From patchwork Wed Dec 7 16:24:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13067324 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51A41C63706 for ; Wed, 7 Dec 2022 16:24:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229868AbiLGQYr (ORCPT ); Wed, 7 Dec 2022 11:24:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48278 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229849AbiLGQYq (ORCPT ); Wed, 7 Dec 2022 11:24:46 -0500 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B15A928E04; Wed, 7 Dec 2022 08:24:44 -0800 (PST) Received: (Authenticated sender: herve.codina@bootlin.com) by mail.gandi.net (Postfix) with ESMTPA id D829340005; Wed, 7 Dec 2022 16:24:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1670430283; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mFK6AOeENQ1uANcJv+R12Fnypco6L8enVtc9IJTWm00=; b=P0orn2Lv9JNQJJe7+lWZGgHK/k2G39eaNPn+ItuddzLi7mNZ/ITdIRZgAydOu9rsvQqEbd lX6xbyt8Y2axGl2afrc12ATZr3i0HcCptB8/4EhNYp7auQRX4dKBxgUlxJQnpyUpKJ0f+1 keFzyfrdit4jY3FzVg8yOKpifYspeeLs+Cy/SWKzSKBrupAh8T1pN2DooR/emLQoAKDLhs mcMOm4X6oZkZW76adsBg5g2bmjvRolWTdlZVZ5Pdl9QSNBaGN4vG0T2HyXXLP4JoJfFtiK TEkkbZFLuaYfZI5QC/tTj28ed3zVo5tmhFNrv+yOCPUiNZuHccnQB+5A71R1dg== From: Herve Codina To: Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Herve Codina , Greg Kroah-Hartman , Magnus Damm , Gareth Williams Cc: linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Thomas Petazzoni , Miquel Raynal Subject: [PATCH v3 1/9] dt-bindings: PCI: renesas,pci-rcar-gen2: Add depends-on for RZ/N1 SoC family Date: Wed, 7 Dec 2022 17:24:27 +0100 Message-Id: <20221207162435.1001782-2-herve.codina@bootlin.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221207162435.1001782-1-herve.codina@bootlin.com> References: <20221207162435.1001782-1-herve.codina@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org In RZ/N1 SoC family, a h2mode setting is available to change the USB configuration from one host and one device to two hosts. This change will be done at sysctrl level and must not be done while USB host or device are running. In order to express this dependency (probe order dependency), introduce 'depends-on' property at PCI bridge level. Signed-off-by: Herve Codina --- .../devicetree/bindings/pci/renesas,pci-rcar-gen2.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/renesas,pci-rcar-gen2.yaml b/Documentation/devicetree/bindings/pci/renesas,pci-rcar-gen2.yaml index 0f18cceba3d5..e1221ad68465 100644 --- a/Documentation/devicetree/bindings/pci/renesas,pci-rcar-gen2.yaml +++ b/Documentation/devicetree/bindings/pci/renesas,pci-rcar-gen2.yaml @@ -130,6 +130,12 @@ allOf: - const: hclkh - const: hclkpm - const: pciclk + depends-on: + $ref: /schemas/types.yaml#/definitions/phandle + description: + Phandle to the node (sysctrl node) that set the 'h2mode' value in + order to express the fact that sysctrl must set the 'h2mode' before + the underlying USB hosts start. required: - clock-names else: From patchwork Wed Dec 7 16:24:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13067325 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6BC1C63706 for ; Wed, 7 Dec 2022 16:24:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229952AbiLGQYu (ORCPT ); Wed, 7 Dec 2022 11:24:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48292 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229762AbiLGQYs (ORCPT ); Wed, 7 Dec 2022 11:24:48 -0500 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 26AC127CFA; Wed, 7 Dec 2022 08:24:47 -0800 (PST) Received: (Authenticated sender: herve.codina@bootlin.com) by mail.gandi.net (Postfix) with ESMTPA id 500AA40009; Wed, 7 Dec 2022 16:24:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1670430285; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=9LRHjpfGj+HDdjJnVaxhTILYasE6yuBGE7Rp83TGivU=; b=jsmrA0urGZbj6X5VOvfY1CuMF2ZgHnn+6tnTV5YbB8b8sp3bTzIiqPQtQuuBZTWmuEKrgW y+zC4LqXixyAQQbmn8uJGov3bDSw4n2gEyMi8u4SX771zSbI0iEFnH9OImr05i5KBBBDPO 9lt0DXAtou7NfHnTuTk5K7ShC1KrnL/tB8nMBwfkXJ6jEHXZAKa9FWLWO9TvydZD7fMiox o7xAlI1QV2oXYKthcV2beGLcHKz8EO5020WGCnISHY+OZB6egmif/FukTsyiNu3Wfa6+sE AuiBmOB6TTiw+xKMo9CAs+E18UVdC46nVwdlzz8Snim3HILF1fu1dpwL9rn0pA== From: Herve Codina To: Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Herve Codina , Greg Kroah-Hartman , Magnus Damm , Gareth Williams Cc: linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Thomas Petazzoni , Miquel Raynal Subject: [PATCH v3 2/9] ARM: dts: r9a06g032: Add dependency to sysctrl in the PCI bridge Date: Wed, 7 Dec 2022 17:24:28 +0100 Message-Id: <20221207162435.1001782-3-herve.codina@bootlin.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221207162435.1001782-1-herve.codina@bootlin.com> References: <20221207162435.1001782-1-herve.codina@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org In r9a06g032 (RZ/N1 SoC family), the USB hosts are impacted by the h2mode setting. This setting will be done at sysctrl level and must not be done while USB hosts are running. Express this dependency using 'depends-on' property. Signed-off-by: Herve Codina --- arch/arm/boot/dts/r9a06g032.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/r9a06g032.dtsi b/arch/arm/boot/dts/r9a06g032.dtsi index 563024c9a4ae..401c88bcdd51 100644 --- a/arch/arm/boot/dts/r9a06g032.dtsi +++ b/arch/arm/boot/dts/r9a06g032.dtsi @@ -125,6 +125,7 @@ pci_usb: pci@40030000 { <&sysctrl R9A06G032_CLK_PCI_USB>; clock-names = "hclkh", "hclkpm", "pciclk"; power-domains = <&sysctrl>; + depends-on = <&sysctrl>; reg = <0x40030000 0xc00>, <0x40020000 0x1100>; interrupts = ; From patchwork Wed Dec 7 16:24:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13067326 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B081CC63706 for ; Wed, 7 Dec 2022 16:24:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229811AbiLGQYy (ORCPT ); Wed, 7 Dec 2022 11:24:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48370 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229979AbiLGQYu (ORCPT ); Wed, 7 Dec 2022 11:24:50 -0500 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::222]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8398D5FB83; Wed, 7 Dec 2022 08:24:49 -0800 (PST) Received: (Authenticated sender: herve.codina@bootlin.com) by mail.gandi.net (Postfix) with ESMTPA id B73DC40008; Wed, 7 Dec 2022 16:24:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1670430288; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=y0zlUYLSpRM2wYy6doN2jLNpclnCDqnuIhKuhPexUHA=; b=YcIx80TuiDjJEXm9SdkhbZCuZuMNq4B5HxmU8WHlg+JbX75PaQ8+QIGGFKcCbBfGPY3fiX XtdvALu+1i+h/rQQhII4b8/78AXi23pDoy8LHtiStSXu+5tZgYoYK+ppIicq8S5Lui5nqq rTbsTvjoJDpNBUZMwC3+BIr2bNyZLP/VM1Ao2HqSCSHaeEeRWUCTFsmliz+Ia1FIjBaeIy wrQWoeoF1EYFpO7MAF3gRfp9uHtuP78uEPlmxKqaCOpigYa3b7+WOD+x8IcSwULDrwsKpA IEGJh0AblSJfPVA7IM1v65yaaJ3W+n3ISO3UEu1qFxu2m6UFxmon7DbeIuXCuA== From: Herve Codina To: Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Herve Codina , Greg Kroah-Hartman , Magnus Damm , Gareth Williams Cc: linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Thomas Petazzoni , Miquel Raynal Subject: [PATCH v3 3/9] dt-bindings: PCI: renesas,pci-rcar-gen2: 'depends-on' is no more optional Date: Wed, 7 Dec 2022 17:24:29 +0100 Message-Id: <20221207162435.1001782-4-herve.codina@bootlin.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221207162435.1001782-1-herve.codina@bootlin.com> References: <20221207162435.1001782-1-herve.codina@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org The 'depends-on' property is set in involved DTS. Move it to a required property. Signed-off-by: Herve Codina --- Documentation/devicetree/bindings/pci/renesas,pci-rcar-gen2.yaml | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/pci/renesas,pci-rcar-gen2.yaml b/Documentation/devicetree/bindings/pci/renesas,pci-rcar-gen2.yaml index e1221ad68465..4dd0f2f72e62 100644 --- a/Documentation/devicetree/bindings/pci/renesas,pci-rcar-gen2.yaml +++ b/Documentation/devicetree/bindings/pci/renesas,pci-rcar-gen2.yaml @@ -138,6 +138,7 @@ allOf: the underlying USB hosts start. required: - clock-names + - depends-on else: properties: clocks: From patchwork Wed Dec 7 16:24:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13067327 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 795BAC63707 for ; Wed, 7 Dec 2022 16:25:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230048AbiLGQZB (ORCPT ); Wed, 7 Dec 2022 11:25:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48402 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230018AbiLGQYw (ORCPT ); Wed, 7 Dec 2022 11:24:52 -0500 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8E5C05E9C7; Wed, 7 Dec 2022 08:24:51 -0800 (PST) Received: (Authenticated sender: herve.codina@bootlin.com) by mail.gandi.net (Postfix) with ESMTPA id F06204000B; Wed, 7 Dec 2022 16:24:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1670430290; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=MS5FcYqq6lphv5bSGh7WZDJt7IC7M73R256NubizXec=; b=levzMiiyqvZQw+FrML4b35QComxkhyuxLis/u7chs95b8evzNvM/txYKoRR88FjyHyh7yr w74g39KZIsvnA6YPFrvvR1wwpNpxm98DI10XS6S54C5aonZ+2kHKrEEHk3ktQ9hL4Ii4e+ Sg6KAhmrdv99JClWCFSCSXeSn2XPq6KykcbyS8tdgMf1F0wHNsaAjx3VlNwfrkVPJHd8L7 L0sCI3tsi4j7iXw5rolDoqsmD3v1/zJ2YKMMEhyqdZvaO7T6zZ9V0y7slzGymqbizvgkI3 ytSi/VWzIbsYuNf0ciSpXMR3U1buaRHTrdc0WK1qO82aByrvJt9eEjyzdTBNKA== From: Herve Codina To: Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Herve Codina , Greg Kroah-Hartman , Magnus Damm , Gareth Williams Cc: linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Thomas Petazzoni , Miquel Raynal Subject: [PATCH v3 4/9] of: property: fw_devlink: Add support for "depends-on" Date: Wed, 7 Dec 2022 17:24:30 +0100 Message-Id: <20221207162435.1001782-5-herve.codina@bootlin.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221207162435.1001782-1-herve.codina@bootlin.com> References: <20221207162435.1001782-1-herve.codina@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org The generic "depends-on" property expresses a simple functionnal dependency. The "depends-on" consumer must be available before the "depends-on" provider. Handling "depends-on" as a fw_devlink matches this dependency in a generic way. Signed-off-by: Herve Codina --- drivers/of/property.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/of/property.c b/drivers/of/property.c index 134cfc980b70..e96678d78f6a 100644 --- a/drivers/of/property.c +++ b/drivers/of/property.c @@ -1324,6 +1324,7 @@ DEFINE_SIMPLE_PROP(pwms, "pwms", "#pwm-cells") DEFINE_SIMPLE_PROP(resets, "resets", "#reset-cells") DEFINE_SIMPLE_PROP(leds, "leds", NULL) DEFINE_SIMPLE_PROP(backlight, "backlight", NULL) +DEFINE_SIMPLE_PROP(depends_on, "depends-on", NULL) DEFINE_SUFFIX_PROP(regulators, "-supply", NULL) DEFINE_SUFFIX_PROP(gpio, "-gpio", "#gpio-cells") @@ -1417,6 +1418,7 @@ static const struct supplier_bindings of_supplier_bindings[] = { { .parse_prop = parse_regulators, }, { .parse_prop = parse_gpio, }, { .parse_prop = parse_gpios, }, + { .parse_prop = parse_depends_on, }, {} }; From patchwork Wed Dec 7 16:24:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13067328 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3BEF2C352A1 for ; Wed, 7 Dec 2022 16:25:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230054AbiLGQZI (ORCPT ); Wed, 7 Dec 2022 11:25:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48510 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229634AbiLGQYz (ORCPT ); Wed, 7 Dec 2022 11:24:55 -0500 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E5269654C5; Wed, 7 Dec 2022 08:24:53 -0800 (PST) Received: (Authenticated sender: herve.codina@bootlin.com) by mail.gandi.net (Postfix) with ESMTPA id 1BA6840002; Wed, 7 Dec 2022 16:24:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1670430292; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Cw1SD2x2j9VwG5OfOxSIfzoHCrLTb+QOElcScbrzv58=; b=Hkxkn/PiG3n5PuVYBTTcdXohsjj1XD/w/ITs/yTxn6IcF29RaPmbylXvApwzBI1twbgert dxdMQWgDUvTNf5Ozg7L92XSDvt+TBk99YsqpKAhJQcvEcfSjwG8LUuVAQ61L+PUvqSB5a/ jL662I6zZEMQaPqG5ulaI2+odF4ALyG7HhL6UGqtbP0LrcE471l2QMUKjgMU8CK1J+SPRd tnD75izDW2Z9xPwE0T42U7aGZXs7SlXgP9zsFDq4iT+WrOcFowff6/2TwVpFifIfgu5nwa 5fWmiSmyUvSbB/vc77olpgUdvnonUDPomfBRUgbnl/BQbTEvWmkgaVB2fCmmzg== From: Herve Codina To: Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Herve Codina , Greg Kroah-Hartman , Magnus Damm , Gareth Williams Cc: linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Thomas Petazzoni , Miquel Raynal Subject: [PATCH v3 5/9] dt-bindings: usb: add the Renesas RZ/N1 USBF controller Date: Wed, 7 Dec 2022 17:24:31 +0100 Message-Id: <20221207162435.1001782-6-herve.codina@bootlin.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221207162435.1001782-1-herve.codina@bootlin.com> References: <20221207162435.1001782-1-herve.codina@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org The Renesas RZ/N1 USBF controller is an USB2.0 device controller (UDC) available in the Renesas r9a06g032 SoC (RZ/N1 family). Signed-off-by: Herve Codina --- .../bindings/usb/renesas,rzn1-usbf.yaml | 77 +++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 Documentation/devicetree/bindings/usb/renesas,rzn1-usbf.yaml diff --git a/Documentation/devicetree/bindings/usb/renesas,rzn1-usbf.yaml b/Documentation/devicetree/bindings/usb/renesas,rzn1-usbf.yaml new file mode 100644 index 000000000000..e746ea55b78d --- /dev/null +++ b/Documentation/devicetree/bindings/usb/renesas,rzn1-usbf.yaml @@ -0,0 +1,77 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/usb/renesas,rzn1-usbf.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Renesas RZ/N1 SoCs USBF (USB Function) controller + +description: | + The Renesas USBF controller is an USB2.0 device + controller (UDC). + +maintainers: + - Herve Codina + +properties: + compatible: + items: + - enum: + - renesas,r9a06g032-usbf + - const: renesas,rzn1-usbf + + reg: + maxItems: 1 + + clocks: + items: + - description: Internal bus clock (AHB) for Function + - description: Internal bus clock (AHB) for Power Management + + clock-names: + items: + - const: hclkf + - const: hclkpm + + power-domains: + maxItems: 1 + + interrupts: + items: + - description: The USBF EPC interrupt + - description: The USBF AHB-EPC interrupt + + depends-on: + $ref: /schemas/types.yaml#/definitions/phandle + description: + Phandle to the node (sysctrl node) that set the 'h2mode' value in + order to express the fact that sysctrl must set the 'h2mode' before + the USB device controller starts. + +required: + - compatible + - reg + - clocks + - clock-names + - power-domains + - interrupts + - depends-on + +additionalProperties: false + +examples: + - | + #include + #include + + usb@4001e000 { + compatible = "renesas,r9a06g032-usbf", "renesas,rzn1-usbf"; + reg = <0x4001e000 0x2000>; + interrupts = , + ; + clocks = <&sysctrl R9A06G032_HCLK_USBF>, + <&sysctrl R9A06G032_HCLK_USBPM>; + clock-names = "hclkf", "hclkpm"; + power-domains = <&sysctrl>; + depends-on = <&sysctrl>; + }; From patchwork Wed Dec 7 16:24:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13067329 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ABE46C4708E for ; Wed, 7 Dec 2022 16:25:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230078AbiLGQZK (ORCPT ); Wed, 7 Dec 2022 11:25:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48712 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229806AbiLGQZA (ORCPT ); Wed, 7 Dec 2022 11:25:00 -0500 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 37B6266C96; Wed, 7 Dec 2022 08:24:56 -0800 (PST) Received: (Authenticated sender: herve.codina@bootlin.com) by mail.gandi.net (Postfix) with ESMTPA id 8507840006; Wed, 7 Dec 2022 16:24:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1670430295; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=pHU0aD1tbBdA8rWIMWA9fVO3ryqaSawRTAzH+m73la0=; b=HDim3kUSIZzhrx35P/B82PmcbWhVElumWfFO2GVmRyvUjJK61FAyp9vVU9VeYIxHSLq4Zv 0dJa+VF3gZ7vmh/j4A6OfjwAznqaZqAgYgUzlmdahgO7wNl+Nv59HDfKWgF93yHs8wEXI0 qZs20lPadclrnVqzNtACyxir5UVDVZIjlxHBgfPotVwYgu+E9jfqpv+WtU7E1SaPLNh+7z 5/TwZ/WUYhhn3vPgUU3kLFEFa0DybBDEkR4yfs5A16FpOI2WRjLdL8YmUdk5nwR8S3nc4O HCuX/nRzAXT7U6wolbjBRyW+H4LQZr4rD7KcWCCqIg42evLgA8+m7fruRc+2Vg== From: Herve Codina To: Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Herve Codina , Greg Kroah-Hartman , Magnus Damm , Gareth Williams Cc: linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Thomas Petazzoni , Miquel Raynal Subject: [PATCH v3 6/9] soc: renesas: r9a06g032-sysctrl: Handle h2mode setting based on USBF presence Date: Wed, 7 Dec 2022 17:24:32 +0100 Message-Id: <20221207162435.1001782-7-herve.codina@bootlin.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221207162435.1001782-1-herve.codina@bootlin.com> References: <20221207162435.1001782-1-herve.codina@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org The CFG_USB[H2MODE] allows to switch the USB configuration. The configuration supported are: - One host and one device or - Two hosts Set CFG_USB[H2MODE] based on the USBF controller (USB device) availability. Signed-off-by: Herve Codina Reviewed-by: Geert Uytterhoeven --- drivers/clk/renesas/r9a06g032-clocks.c | 28 ++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/clk/renesas/r9a06g032-clocks.c b/drivers/clk/renesas/r9a06g032-clocks.c index 1488c9d6e639..8a09ba79b97f 100644 --- a/drivers/clk/renesas/r9a06g032-clocks.c +++ b/drivers/clk/renesas/r9a06g032-clocks.c @@ -25,6 +25,8 @@ #include #include +#define R9A06G032_SYSCTRL_USB 0x00 +#define R9A06G032_SYSCTRL_USB_H2MODE (1<<1) #define R9A06G032_SYSCTRL_DMAMUX 0xA0 struct r9a06g032_gate { @@ -919,6 +921,29 @@ static void r9a06g032_clocks_del_clk_provider(void *data) of_clk_del_provider(data); } +static void __init r9a06g032_init_h2mode(struct r9a06g032_priv *clocks) +{ + struct device_node *usbf_np = NULL; + u32 usb; + + while ((usbf_np = of_find_compatible_node(usbf_np, NULL, + "renesas,rzn1-usbf"))) { + if (of_device_is_available(usbf_np)) + break; + } + + usb = readl(clocks->reg + R9A06G032_SYSCTRL_USB); + if (usbf_np) { + /* 1 host and 1 device mode */ + usb &= ~R9A06G032_SYSCTRL_USB_H2MODE; + of_node_put(usbf_np); + } else { + /* 2 hosts mode */ + usb |= R9A06G032_SYSCTRL_USB_H2MODE; + } + writel(usb, clocks->reg + R9A06G032_SYSCTRL_USB); +} + static int __init r9a06g032_clocks_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -948,6 +973,9 @@ static int __init r9a06g032_clocks_probe(struct platform_device *pdev) clocks->reg = of_iomap(np, 0); if (WARN_ON(!clocks->reg)) return -ENOMEM; + + r9a06g032_init_h2mode(clocks); + for (i = 0; i < ARRAY_SIZE(r9a06g032_clocks); ++i) { const struct r9a06g032_clkdesc *d = &r9a06g032_clocks[i]; const char *parent_name = d->source ? From patchwork Wed Dec 7 16:24:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13067330 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1FD4DC352A1 for ; Wed, 7 Dec 2022 16:25:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230136AbiLGQZ3 (ORCPT ); Wed, 7 Dec 2022 11:25:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48724 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230088AbiLGQZK (ORCPT ); Wed, 7 Dec 2022 11:25:10 -0500 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0230066CA2; Wed, 7 Dec 2022 08:24:58 -0800 (PST) Received: (Authenticated sender: herve.codina@bootlin.com) by mail.gandi.net (Postfix) with ESMTPA id E656740008; Wed, 7 Dec 2022 16:24:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1670430297; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=5vMoI2RfYchgdqqCQLWwDyzTsR6N7TvYR1K72aIp0kM=; b=ffMHgo/kc+tGY1tbUw0zojLy+flLWBFrVMjxuoHNsXmQJ4d5DxTxF8ESTwrWafo0HYwXql Z+yzSvZ5S8hMFbMz1c11+XnnYI6sj6rEkkbPx4kTtZTLWhP1aPLViOWWQYUfxiialm8SfC n+SSIg/G0YCpWgrtkBYaWOwowwvTcmMlc9J+xz9ugsb3b9QjIa2Bu+WzH/xDKaZf6lAuZM +SbLaCFnJtohhHKvjaCQmqkln7wyh/x1/Xa/S3kFtEQrLltD9h+S8PAojtPgzBjMZvOd2i iSZ3vfpyK+SExHqEsl6mm/83as6BnTY8dj6bXU/YXl+DaXRyj8cHWC868l8Eig== From: Herve Codina To: Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Herve Codina , Greg Kroah-Hartman , Magnus Damm , Gareth Williams Cc: linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Thomas Petazzoni , Miquel Raynal Subject: [PATCH v3 7/9] usb: gadget: udc: add Renesas RZ/N1 USBF controller support Date: Wed, 7 Dec 2022 17:24:33 +0100 Message-Id: <20221207162435.1001782-8-herve.codina@bootlin.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221207162435.1001782-1-herve.codina@bootlin.com> References: <20221207162435.1001782-1-herve.codina@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Add support for the Renesas USBF controller. This controller is an USB2.0 UDC controller available in the Renesas r9a06g032 SoC (RZ/N1 family). Signed-off-by: Herve Codina --- drivers/usb/gadget/udc/Kconfig | 11 + drivers/usb/gadget/udc/Makefile | 1 + drivers/usb/gadget/udc/renesas_usbf.c | 3420 +++++++++++++++++++++++++ 3 files changed, 3432 insertions(+) create mode 100644 drivers/usb/gadget/udc/renesas_usbf.c diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig index 5756acb07b8d..f856d2c61603 100644 --- a/drivers/usb/gadget/udc/Kconfig +++ b/drivers/usb/gadget/udc/Kconfig @@ -204,6 +204,17 @@ config USB_RENESAS_USB3 dynamically linked module called "renesas_usb3" and force all gadget drivers to also be dynamically linked. +config USB_RENESAS_USBF + tristate 'Renesas USB Function controller' + depends on ARCH_RENESAS || COMPILE_TEST + help + Renesas USB Function controller is a USB peripheral controller + available on RZ/N1 Renesas SoCs. + + Say "y" to link the driver statically, or "m" to build a + dynamically linked module called "renesas_usbf" and force all + gadget drivers to also be dynamically linked. + config USB_PXA27X tristate "PXA 27x" depends on HAS_IOMEM diff --git a/drivers/usb/gadget/udc/Makefile b/drivers/usb/gadget/udc/Makefile index 12f9e4c9eb0c..99a2221c0f8b 100644 --- a/drivers/usb/gadget/udc/Makefile +++ b/drivers/usb/gadget/udc/Makefile @@ -27,6 +27,7 @@ obj-$(CONFIG_USB_TEGRA_XUDC) += tegra-xudc.o obj-$(CONFIG_USB_M66592) += m66592-udc.o obj-$(CONFIG_USB_R8A66597) += r8a66597-udc.o obj-$(CONFIG_USB_RENESAS_USB3) += renesas_usb3.o +obj-$(CONFIG_USB_RENESAS_USBF) += renesas_usbf.o obj-$(CONFIG_USB_FSL_QE) += fsl_qe_udc.o obj-$(CONFIG_USB_S3C_HSUDC) += s3c-hsudc.o obj-$(CONFIG_USB_LPC32XX) += lpc32xx_udc.o diff --git a/drivers/usb/gadget/udc/renesas_usbf.c b/drivers/usb/gadget/udc/renesas_usbf.c new file mode 100644 index 000000000000..856017de8f9b --- /dev/null +++ b/drivers/usb/gadget/udc/renesas_usbf.c @@ -0,0 +1,3420 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Renesas USBF USB Function driver + * + * Copyright 2022 Schneider Electric + * Author: Herve Codina + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifdef DEBUG +#define TRACE(_fmt, ...) trace_printk("%s: " _fmt, __func__, ##__VA_ARGS__) +#define USBF_TRACE_EP_MASK 0x0ffff /* All the 16 endpoints */ +#define TRACEEP(_ep, _fmt, ...) \ + do { \ + if ((1 << (_ep)->id) & USBF_TRACE_EP_MASK) \ + trace_printk("%s: " _fmt, __func__, ##__VA_ARGS__); \ + } while (0) +#else +#define TRACE(_fmt, ...) do { } while (0) +#define TRACEEP(_ep, _fmt, ...) do { } while (0) +#endif + +#define USBF_NUM_ENDPOINTS 16 +#define USBF_EP0_MAX_PCKT_SIZE 64 + +/* EPC registers */ +#define USBF_REG_USB_CONTROL 0x000 +#define USBF_USB_PUE2 BIT(2) +#define USBF_USB_CONNECTB BIT(3) +#define USBF_USB_DEFAULT BIT(4) +#define USBF_USB_CONF BIT(5) +#define USBF_USB_SUSPEND BIT(6) +#define USBF_USB_RSUM_IN BIT(7) +#define USBF_USB_SOF_RCV BIT(8) +#define USBF_USB_FORCEFS BIT(9) +#define USBF_USB_INT_SEL BIT(10) +#define USBF_USB_SOF_CLK_MODE BIT(11) + +#define USBF_REG_USB_STATUS 0x004 +#define USBF_USB_RSUM_OUT BIT(1) +#define USBF_USB_SPND_OUT BIT(2) +#define USBF_USB_USB_RST BIT(3) +#define USBF_USB_DEFAULT_ST BIT(4) +#define USBF_USB_CONF_ST BIT(5) +#define USBF_USB_SPEED_MODE BIT(6) +#define USBF_USB_SOF_DELAY_STATUS BIT(31) + +#define USBF_REG_USB_ADDRESS 0x008 +#define USBF_USB_SOF_STATUS BIT(15) +#define USBF_USB_SET_USB_ADDR(_a) ((_a) << 16) +#define USBF_USB_GET_FRAME(_r) ((_r) & 0x7FF) + +#define USBF_REG_SETUP_DATA0 0x018 +#define USBF_REG_SETUP_DATA1 0x01C +#define USBF_REG_USB_INT_STA 0x020 +#define USBF_USB_RSUM_INT BIT(1) +#define USBF_USB_SPND_INT BIT(2) +#define USBF_USB_USB_RST_INT BIT(3) +#define USBF_USB_SOF_INT BIT(4) +#define USBF_USB_SOF_ERROR_INT BIT(5) +#define USBF_USB_SPEED_MODE_INT BIT(6) +#define USBF_USB_EPN_INT(_n) (BIT(8) << (_n)) /* n=0..15 */ + +#define USBF_REG_USB_INT_ENA 0x024 +#define USBF_USB_RSUM_EN BIT(1) +#define USBF_USB_SPND_EN BIT(2) +#define USBF_USB_USB_RST_EN BIT(3) +#define USBF_USB_SOF_EN BIT(4) +#define USBF_USB_SOF_ERROR_EN BIT(5) +#define USBF_USB_SPEED_MODE_EN BIT(6) +#define USBF_USB_EPN_EN(_n) (BIT(8) << (_n)) /* n=0..15 */ + +#define USBF_BASE_EP0 0x028 +/* EP0 registers offsets from Base + USBF_BASE_EP0 (EP0 regs area) */ +#define USBF_REG_EP0_CONTROL 0x00 +#define USBF_EP0_ONAK BIT(0) +#define USBF_EP0_INAK BIT(1) +#define USBF_EP0_STL BIT(2) +#define USBF_EP0_PERR_NAK_CLR BIT(3) +#define USBF_EP0_INAK_EN BIT(4) +#define USBF_EP0_DW_MASK (0x3 << 5) +#define USBF_EP0_DW(_s) ((_s) << 5) +#define USBF_EP0_DEND BIT(7) +#define USBF_EP0_BCLR BIT(8) +#define USBF_EP0_PIDCLR BIT(9) +#define USBF_EP0_AUTO BIT(16) +#define USBF_EP0_OVERSEL BIT(17) +#define USBF_EP0_STGSEL BIT(18) + +#define USBF_REG_EP0_STATUS 0x04 +#define USBF_EP0_SETUP_INT BIT(0) +#define USBF_EP0_STG_START_INT BIT(1) +#define USBF_EP0_STG_END_INT BIT(2) +#define USBF_EP0_STALL_INT BIT(3) +#define USBF_EP0_IN_INT BIT(4) +#define USBF_EP0_OUT_INT BIT(5) +#define USBF_EP0_OUT_OR_INT BIT(6) +#define USBF_EP0_OUT_NULL_INT BIT(7) +#define USBF_EP0_IN_EMPTY BIT(8) +#define USBF_EP0_IN_FULL BIT(9) +#define USBF_EP0_IN_DATA BIT(10) +#define USBF_EP0_IN_NAK_INT BIT(11) +#define USBF_EP0_OUT_EMPTY BIT(12) +#define USBF_EP0_OUT_FULL BIT(13) +#define USBF_EP0_OUT_NULL BIT(14) +#define USBF_EP0_OUT_NAK_INT BIT(15) +#define USBF_EP0_PERR_NAK_INT BIT(16) +#define USBF_EP0_PERR_NAK BIT(17) +#define USBF_EP0_PID BIT(18) + +#define USBF_REG_EP0_INT_ENA 0x08 +#define USBF_EP0_SETUP_EN BIT(0) +#define USBF_EP0_STG_START_EN BIT(1) +#define USBF_EP0_STG_END_EN BIT(2) +#define USBF_EP0_STALL_EN BIT(3) +#define USBF_EP0_IN_EN BIT(4) +#define USBF_EP0_OUT_EN BIT(5) +#define USBF_EP0_OUT_OR_EN BIT(6) +#define USBF_EP0_OUT_NULL_EN BIT(7) +#define USBF_EP0_IN_NAK_EN BIT(11) +#define USBF_EP0_OUT_NAK_EN BIT(15) +#define USBF_EP0_PERR_NAK_EN BIT(16) + +#define USBF_REG_EP0_LENGTH 0x0C +#define USBF_EP0_LDATA (0x7FF << 0) +#define USBF_REG_EP0_READ 0x10 +#define USBF_REG_EP0_WRITE 0x14 + +#define USBF_BASE_EPN(_n) (0x040 + (_n) * 0x020) +/* EPn registers offsets from Base + USBF_BASE_EPN(n-1). n=1..15 */ +#define USBF_REG_EPN_CONTROL 0x000 +#define USBF_EPN_ONAK BIT(0) +#define USBF_EPN_OSTL BIT(2) +#define USBF_EPN_ISTL BIT(3) +#define USBF_EPN_OSTL_EN BIT(4) +#define USBF_EPN_DW_MASK (0x3 << 5) +#define USBF_EPN_DW(_s) ((_s) << 5) +#define USBF_EPN_DEND BIT(7) +#define USBF_EPN_CBCLR BIT(8) +#define USBF_EPN_BCLR BIT(9) +#define USBF_EPN_OPIDCLR BIT(10) +#define USBF_EPN_IPIDCLR BIT(11) +#define USBF_EPN_AUTO BIT(16) +#define USBF_EPN_OVERSEL BIT(17) +#define USBF_EPN_MODE_MASK (0x3 << 24) +#define USBF_EPN_MODE_BULK (0x0 << 24) +#define USBF_EPN_MODE_INTR (0x1 << 24) +#define USBF_EPN_MODE_ISO (0x2 << 24) +#define USBF_EPN_DIR0 BIT(26) +#define USBF_EPN_BUF_TYPE_DOUBLE BIT(30) +#define USBF_EPN_EN BIT(31) + +#define USBF_REG_EPN_STATUS 0x004 +#define USBF_EPN_IN_EMPTY BIT(0) +#define USBF_EPN_IN_FULL BIT(1) +#define USBF_EPN_IN_DATA BIT(2) +#define USBF_EPN_IN_INT BIT(3) +#define USBF_EPN_IN_STALL_INT BIT(4) +#define USBF_EPN_IN_NAK_ERR_INT BIT(5) +#define USBF_EPN_IN_END_INT BIT(7) +#define USBF_EPN_IPID BIT(10) +#define USBF_EPN_OUT_EMPTY BIT(16) +#define USBF_EPN_OUT_FULL BIT(17) +#define USBF_EPN_OUT_NULL_INT BIT(18) +#define USBF_EPN_OUT_INT BIT(19) +#define USBF_EPN_OUT_STALL_INT BIT(20) +#define USBF_EPN_OUT_NAK_ERR_INT BIT(21) +#define USBF_EPN_OUT_OR_INT BIT(22) +#define USBF_EPN_OUT_END_INT BIT(23) +#define USBF_EPN_ISO_CRC BIT(24) +#define USBF_EPN_ISO_OR BIT(26) +#define USBF_EPN_OUT_NOTKN BIT(27) +#define USBF_EPN_ISO_OPID BIT(28) +#define USBF_EPN_ISO_PIDERR BIT(29) + +#define USBF_REG_EPN_INT_ENA 0x008 +#define USBF_EPN_IN_EN BIT(3) +#define USBF_EPN_IN_STALL_EN BIT(4) +#define USBF_EPN_IN_NAK_ERR_EN BIT(5) +#define USBF_EPN_IN_END_EN BIT(7) +#define USBF_EPN_OUT_NULL_EN BIT(18) +#define USBF_EPN_OUT_EN BIT(19) +#define USBF_EPN_OUT_STALL_EN BIT(20) +#define USBF_EPN_OUT_NAK_ERR_EN BIT(21) +#define USBF_EPN_OUT_OR_EN BIT(22) +#define USBF_EPN_OUT_END_EN BIT(23) + +#define USBF_REG_EPN_DMA_CTRL 0x00C +#define USBF_EPN_DMAMODE0 BIT(0) +#define USBF_EPN_DMA_EN BIT(4) +#define USBF_EPN_STOP_SET BIT(8) +#define USBF_EPN_BURST_SET BIT(9) +#define USBF_EPN_DEND_SET BIT(10) +#define USBF_EPN_STOP_MODE BIT(11) + +#define USBF_REG_EPN_PCKT_ADRS 0x010 +#define USBF_EPN_MPKT(_l) ((_l) << 0) +#define USBF_EPN_BASEAD(_a) ((_a) << 16) + +#define USBF_REG_EPN_LEN_DCNT 0x014 +#define USBF_EPN_GET_LDATA(_r) ((_r) & 0x7FF) +#define USBF_EPN_SET_DMACNT(_c) ((_c) << 16) +#define USBF_EPN_GET_DMACNT(_r) (((_r) >> 16) & 0x1ff) + +#define USBF_REG_EPN_READ 0x018 +#define USBF_REG_EPN_WRITE 0x01C + +/* AHB-EPC Bridge registers */ +#define USBF_REG_AHBSCTR 0x1000 +#define USBF_REG_AHBMCTR 0x1004 +#define USBF_SYS_WBURST_TYPE BIT(2) +#define USBF_SYS_ARBITER_CTR BIT(31) + +#define USBF_REG_AHBBINT 0x1008 +#define USBF_SYS_ERR_MASTER (0x0F << 0) +#define USBF_SYS_SBUS_ERRINT0 BIT(4) +#define USBF_SYS_SBUS_ERRINT1 BIT(5) +#define USBF_SYS_MBUS_ERRINT BIT(6) +#define USBF_SYS_VBUS_INT BIT(13) +#define USBF_SYS_DMA_ENDINT_EPN(_n) (BIT(16) << (_n)) /* _n=1..15 */ + +#define USBF_REG_AHBBINTEN 0x100C +#define USBF_SYS_SBUS_ERRINT0EN BIT(4) +#define USBF_SYS_SBUS_ERRINT1EN BIT(5) +#define USBF_SYS_MBUS_ERRINTEN BIT(6) +#define USBF_SYS_VBUS_INTEN BIT(13) +#define USBF_SYS_DMA_ENDINTEN_EPN(_n) (BIT(16) << (_n)) /* _n=1..15 */ + +#define USBF_REG_EPCTR 0x1010 +#define USBF_SYS_EPC_RST BIT(0) +#define USBF_SYS_PLL_RST BIT(2) +#define USBF_SYS_PLL_LOCK BIT(4) +#define USBF_SYS_PLL_RESUME BIT(5) +#define USBF_SYS_VBUS_LEVEL BIT(8) +#define USBF_SYS_DIRPD BIT(12) + +#define USBF_REG_USBSSVER 0x1020 +#define USBF_REG_USBSSCONF 0x1024 +#define USBF_SYS_DMA_AVAILABLE(_n) (BIT(0) << (_n)) /* _n=0..15 */ +#define USBF_SYS_EP_AVAILABLE(_n) (BIT(16) << (_n)) /* _n=0..15 */ + +#define USBF_BASE_DMA_EPN(_n) (0x1110 + (_n) * 0x010) +/* EPn DMA registers offsets from Base USBF_BASE_DMA_EPN(n-1). n=1..15*/ +#define USBF_REG_DMA_EPN_DCR1 0x00 +#define USBF_SYS_EPN_REQEN BIT(0) +#define USBF_SYS_EPN_DIR0 BIT(1) +#define USBF_SYS_EPN_SET_DMACNT(_c) ((_c) << 16) +#define USBF_SYS_EPN_GET_DMACNT(_r) (((_r) >> 16) & 0x0FF) + +#define USBF_REG_DMA_EPN_DCR2 0x04 +#define USBF_SYS_EPN_MPKT(_s) ((_s) << 0) +#define USBF_SYS_EPN_LMPKT(_l) ((_l) << 16) + +#define USBF_REG_DMA_EPN_TADR 0x08 + +/* USB request */ +struct usbf_req { + struct usb_request req; + struct list_head queue; + unsigned int is_zero_sent : 1; + unsigned int is_mapped : 1; + enum { + USBF_XFER_START, + USBF_XFER_WAIT_DMA, + USBF_XFER_SEND_NULL, + USBF_XFER_WAIT_END, + USBF_XFER_WAIT_DMA_SHORT, + USBF_XFER_WAIT_BRIDGE, + } xfer_step; + size_t dma_size; +}; + +/* USB Endpoint */ +struct usbf_ep { + struct usb_ep ep; + char name[32]; + struct list_head queue; + int is_processing : 1; + int is_in : 1; + struct usbf_udc *udc; + void __iomem *regs; + void __iomem *dma_regs; + unsigned id : 8; + unsigned disabled : 1; + unsigned is_wedged : 1; + unsigned delayed_status : 1; + u32 status; + void (*bridge_on_dma_end)(struct usbf_ep *ep); +}; + +enum usbf_ep0state { + EP0_IDLE, + EP0_IN_DATA_PHASE, + EP0_OUT_DATA_PHASE, + EP0_OUT_STATUS_START_PHASE, + EP0_OUT_STATUS_PHASE, + EP0_OUT_STATUS_END_PHASE, + EP0_IN_STATUS_START_PHASE, + EP0_IN_STATUS_PHASE, + EP0_IN_STATUS_END_PHASE, +}; + +struct usbf_udc { + struct usb_gadget gadget; + struct usb_gadget_driver *driver; + struct device *dev; + void __iomem *regs; + spinlock_t lock; + bool is_remote_wakeup; + bool is_usb_suspended; + struct usbf_ep ep[USBF_NUM_ENDPOINTS]; + /* for EP0 control messages */ + enum usbf_ep0state ep0state; + struct usbf_req setup_reply; + u8 ep0_buf[USBF_EP0_MAX_PCKT_SIZE]; +}; + +struct usbf_ep_info { + const char *name; + struct usb_ep_caps caps; + u16 base_addr; + int is_double : 1; + u16 maxpacket_limit; +}; + +#define USBF_SINGLE_BUFFER 0 +#define USBF_DOUBLE_BUFFER 1 +#define USBF_EP_INFO(_name, _caps, _base_addr, _is_double, _maxpacket_limit) \ + { \ + .name = _name, \ + .caps = _caps, \ + .base_addr = _base_addr, \ + .is_double = _is_double, \ + .maxpacket_limit = _maxpacket_limit, \ + } + +/* This table is computed from the recommended values provided in the SOC + * datasheet. The buffer type (single/double) and the endpoint type cannot + * be changed. The mapping in internal RAM (base_addr and number of words) + * for each endpoints depends on the max packet size and the buffer type. + */ +static const struct usbf_ep_info usbf_ep_info[USBF_NUM_ENDPOINTS] = { + /* ep0: buf @0x0000 64 bytes, fixed 32 words */ + [0] = USBF_EP_INFO("ep0-ctrl", + USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, + USB_EP_CAPS_DIR_ALL), + 0x0000, USBF_SINGLE_BUFFER, USBF_EP0_MAX_PCKT_SIZE), + /* ep1: buf @0x0020, 2 buffers 512 bytes -> (512 * 2 / 4) words */ + [1] = USBF_EP_INFO("ep1-bulk", + USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, + USB_EP_CAPS_DIR_ALL), + 0x0020, USBF_DOUBLE_BUFFER, 512), + /* ep2: buf @0x0120, 2 buffers 512 bytes -> (512 * 2 / 4) words */ + [2] = USBF_EP_INFO("ep2-bulk", + USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, + USB_EP_CAPS_DIR_ALL), + 0x0120, USBF_DOUBLE_BUFFER, 512), + /* ep3: buf @0x0220, 1 buffer 512 bytes -> (512 * 2 / 4) words */ + [3] = USBF_EP_INFO("ep3-bulk", + USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, + USB_EP_CAPS_DIR_ALL), + 0x0220, USBF_SINGLE_BUFFER, 512), + /* ep4: buf @0x02A0, 1 buffer 512 bytes -> (512 * 1 / 4) words */ + [4] = USBF_EP_INFO("ep4-bulk", + USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, + USB_EP_CAPS_DIR_ALL), + 0x02A0, USBF_SINGLE_BUFFER, 512), + /* ep5: buf @0x0320, 1 buffer 512 bytes -> (512 * 2 / 4) words */ + [5] = USBF_EP_INFO("ep5-bulk", + USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, + USB_EP_CAPS_DIR_ALL), + 0x0320, USBF_SINGLE_BUFFER, 512), + /* ep6: buf @0x03A0, 1 buffer 1024 bytes -> (1024 * 1 / 4) words */ + [6] = USBF_EP_INFO("ep6-int", + USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, + USB_EP_CAPS_DIR_ALL), + 0x03A0, USBF_SINGLE_BUFFER, 1024), + /* ep7: buf @0x04A0, 1 buffer 1024 bytes -> (1024 * 1 / 4) words */ + [7] = USBF_EP_INFO("ep7-int", + USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, + USB_EP_CAPS_DIR_ALL), + 0x04A0, USBF_SINGLE_BUFFER, 1024), + /* ep8: buf @0x0520, 1 buffer 1024 bytes -> (1024 * 1 / 4) words */ + [8] = USBF_EP_INFO("ep8-int", + USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, + USB_EP_CAPS_DIR_ALL), + 0x0520, USBF_SINGLE_BUFFER, 1024), + /* ep9: buf @0x0620, 1 buffer 1024 bytes -> (1024 * 1 / 4) words */ + [9] = USBF_EP_INFO("ep9-int", + USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, + USB_EP_CAPS_DIR_ALL), + 0x0620, USBF_SINGLE_BUFFER, 1024), + /* ep10: buf @0x0720, 2 buffers 1024 bytes -> (1024 * 2 / 4) words */ + [10] = USBF_EP_INFO("ep10-iso", + USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, + USB_EP_CAPS_DIR_ALL), + 0x0720, USBF_DOUBLE_BUFFER, 1024), + /* ep11: buf @0x0920, 2 buffers 1024 bytes -> (1024 * 2 / 4) words */ + [11] = USBF_EP_INFO("ep11-iso", + USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, + USB_EP_CAPS_DIR_ALL), + 0x0920, USBF_DOUBLE_BUFFER, 1024), + /* ep12: buf @0x0B20, 2 buffers 1024 bytes -> (1024 * 2 / 4) words */ + [12] = USBF_EP_INFO("ep12-iso", + USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, + USB_EP_CAPS_DIR_ALL), + 0x0B20, USBF_DOUBLE_BUFFER, 1024), + /* ep13: buf @0x0D20, 2 buffers 1024 bytes -> (1024 * 2 / 4) words */ + [13] = USBF_EP_INFO("ep13-iso", + USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, + USB_EP_CAPS_DIR_ALL), + 0x0D20, USBF_DOUBLE_BUFFER, 1024), + /* ep14: buf @0x0F20, 2 buffers 1024 bytes -> (1024 * 2 / 4) words */ + [14] = USBF_EP_INFO("ep14-iso", + USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, + USB_EP_CAPS_DIR_ALL), + 0x0F20, USBF_DOUBLE_BUFFER, 1024), + /* ep15: buf @0x1120, 2 buffers 1024 bytes -> (1024 * 2 / 4) words */ + [15] = USBF_EP_INFO("ep15-iso", + USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, + USB_EP_CAPS_DIR_ALL), + 0x1120, USBF_DOUBLE_BUFFER, 1024), +}; + +static inline u32 usbf_reg_readl(struct usbf_udc *udc, uint offset) +{ + return readl(udc->regs + offset); +} + +static inline void usbf_reg_writel(struct usbf_udc *udc, uint offset, u32 val) +{ + writel(val, udc->regs + offset); +} + +static inline void usbf_reg_bitset(struct usbf_udc *udc, uint offset, u32 set) +{ + u32 tmp; + + tmp = usbf_reg_readl(udc, offset); + tmp |= set; + usbf_reg_writel(udc, offset, tmp); +} + +static inline void usbf_reg_bitclr(struct usbf_udc *udc, uint offset, u32 clr) +{ + u32 tmp; + + tmp = usbf_reg_readl(udc, offset); + tmp &= ~clr; + usbf_reg_writel(udc, offset, tmp); +} + +static inline void usbf_reg_clrset(struct usbf_udc *udc, uint offset, + u32 clr, u32 set) +{ + u32 tmp; + + tmp = usbf_reg_readl(udc, offset); + tmp &= ~clr; + tmp |= set; + usbf_reg_writel(udc, offset, tmp); +} + +static inline u32 usbf_ep_reg_readl(struct usbf_ep *ep, uint offset) +{ + return readl(ep->regs + offset); +} + +static inline void usbf_ep_reg_read_rep(struct usbf_ep *ep, uint offset, + void *dst, uint count) +{ + readsl(ep->regs + offset, dst, count); +} + +static inline void usbf_ep_reg_writel(struct usbf_ep *ep, uint offset, u32 val) +{ + writel(val, ep->regs + offset); +} + +static inline void usbf_ep_reg_write_rep(struct usbf_ep *ep, uint offset, + const void *src, uint count) +{ + writesl(ep->regs + offset, src, count); +} + +static inline void usbf_ep_reg_bitset(struct usbf_ep *ep, uint offset, u32 set) +{ + u32 tmp; + + tmp = usbf_ep_reg_readl(ep, offset); + tmp |= set; + usbf_ep_reg_writel(ep, offset, tmp); +} + +static inline void usbf_ep_reg_bitclr(struct usbf_ep *ep, uint offset, u32 clr) +{ + u32 tmp; + + tmp = usbf_ep_reg_readl(ep, offset); + tmp &= ~clr; + usbf_ep_reg_writel(ep, offset, tmp); +} + +static inline void usbf_ep_reg_clrset(struct usbf_ep *ep, uint offset, + u32 clr, u32 set) +{ + u32 tmp; + + tmp = usbf_ep_reg_readl(ep, offset); + tmp &= ~clr; + tmp |= set; + usbf_ep_reg_writel(ep, offset, tmp); +} + +static inline u32 usbf_ep_dma_reg_readl(struct usbf_ep *ep, uint offset) +{ + return readl(ep->dma_regs + offset); +} + +static inline void usbf_ep_dma_reg_writel(struct usbf_ep *ep, uint offset, + u32 val) +{ + writel(val, ep->dma_regs + offset); +} + +static inline void usbf_ep_dma_reg_bitset(struct usbf_ep *ep, uint offset, + u32 set) +{ + u32 tmp; + + tmp = usbf_ep_dma_reg_readl(ep, offset); + tmp |= set; + usbf_ep_dma_reg_writel(ep, offset, tmp); +} + +static inline void usbf_ep_dma_reg_bitclr(struct usbf_ep *ep, uint offset, + u32 clr) +{ + u32 tmp; + + tmp = usbf_ep_dma_reg_readl(ep, offset); + tmp &= ~clr; + usbf_ep_dma_reg_writel(ep, offset, tmp); +} + +static inline void usbf_ep_dma_reg_clrset(struct usbf_ep *ep, uint offset, + u32 clr, u32 set) +{ + u32 tmp; + + tmp = usbf_ep_dma_reg_readl(ep, offset); + tmp &= ~clr; + tmp |= set; + usbf_ep_dma_reg_writel(ep, offset, tmp); +} + +static void usbf_ep0_send_null(struct usbf_ep *ep0, bool is_data1) +{ + u32 set; + + set = USBF_EP0_DEND; + if (is_data1) + set |= USBF_EP0_PIDCLR; + + usbf_ep_reg_bitset(ep0, USBF_REG_EP0_CONTROL, set); +} + +static int usbf_ep0_pio_in(struct usbf_ep *ep0, struct usbf_req *req) +{ + unsigned int left; + unsigned int nb; + const void *buf; + u32 ctrl; + u32 last; + + left = req->req.length - req->req.actual; + + if (left == 0) { + if (!req->is_zero_sent) { + if (req->req.length == 0) { + TRACEEP(ep0, "send null\n"); + usbf_ep0_send_null(ep0, false); + req->is_zero_sent = 1; + return -EINPROGRESS; + } + if ((req->req.actual % ep0->ep.maxpacket) == 0) { + if (req->req.zero) { + TRACEEP(ep0, "send null\n"); + usbf_ep0_send_null(ep0, false); + req->is_zero_sent = 1; + return -EINPROGRESS; + } + } + } + return 0; + } + + if (left > ep0->ep.maxpacket) + left = ep0->ep.maxpacket; + + buf = req->req.buf; + buf += req->req.actual; + + nb = left / sizeof(u32); + if (nb) { + usbf_ep_reg_write_rep(ep0, USBF_REG_EP0_WRITE, buf, nb); + buf += (nb * sizeof(u32)); + req->req.actual += (nb * sizeof(u32)); + left -= (nb * sizeof(u32)); + } + ctrl = usbf_ep_reg_readl(ep0, USBF_REG_EP0_CONTROL); + ctrl &= ~USBF_EP0_DW_MASK; + if (left) { + memcpy(&last, buf, left); + usbf_ep_reg_writel(ep0, USBF_REG_EP0_WRITE, last); + ctrl |= USBF_EP0_DW(left); + req->req.actual += left; + } + usbf_ep_reg_writel(ep0, USBF_REG_EP0_CONTROL, ctrl | USBF_EP0_DEND); + + TRACEEP(ep0, "send %u/%u\n", req->req.actual, req->req.length); + + return -EINPROGRESS; +} + +static int usbf_ep0_pio_out(struct usbf_ep *ep0, struct usbf_req *req) +{ + int req_status = 0; + unsigned int count; + unsigned int recv; + unsigned int left; + unsigned int nb; + void *buf; + u32 last; + + if (ep0->status & USBF_EP0_OUT_INT) { + recv = usbf_ep_reg_readl(ep0, USBF_REG_EP0_LENGTH) & USBF_EP0_LDATA; + count = recv; + + buf = req->req.buf; + buf += req->req.actual; + + left = req->req.length - req->req.actual; + + TRACEEP(ep0, "recv %u, left %u\n", count, left); + + if (left > ep0->ep.maxpacket) + left = ep0->ep.maxpacket; + + if (count > left) { + req_status = -EOVERFLOW; + count = left; + } + + if (count) { + nb = count / sizeof(u32); + if (nb) { + usbf_ep_reg_read_rep(ep0, USBF_REG_EP0_READ, + buf, nb); + buf += (nb * sizeof(u32)); + req->req.actual += (nb * sizeof(u32)); + count -= (nb * sizeof(u32)); + } + if (count) { + last = usbf_ep_reg_readl(ep0, USBF_REG_EP0_READ); + memcpy(buf, &last, count); + req->req.actual += count; + } + } + TRACEEP(ep0, "recv %u/%u\n", req->req.actual, req->req.length); + + if (req_status) { + TRACEEP(ep0, "req.status=%d\n", req_status); + req->req.status = req_status; + return 0; + } + + if (recv < ep0->ep.maxpacket) { + TRACEEP(ep0, "short packet\n"); + /* This is a short packet -> It is the end */ + req->req.status = 0; + return 0; + } + + /* The Data stage of a control transfer from an endpoint to the + * host is complete when the endpoint does one of the following: + * - Has transferred exactly the expected amount of data + * - Transfers a packet with a payload size less than + * wMaxPacketSize or transfers a zero-length packet + */ + if (req->req.actual == req->req.length) { + req->req.status = 0; + return 0; + } + } + + if (ep0->status & USBF_EP0_OUT_NULL_INT) { + /* NULL packet received */ + TRACEEP(ep0, "null packet\n"); + if (req->req.actual != req->req.length) { + req->req.status = req->req.short_not_ok ? + -EREMOTEIO : 0; + } else { + req->req.status = 0; + } + return 0; + } + + return -EINPROGRESS; +} + +static void usbf_ep0_fifo_flush(struct usbf_ep *ep0) +{ + u32 sts; + int ret; + + usbf_ep_reg_bitset(ep0, USBF_REG_EP0_CONTROL, USBF_EP0_BCLR); + + ret = readl_poll_timeout_atomic(ep0->regs + USBF_REG_EP0_STATUS, sts, + (sts & (USBF_EP0_IN_DATA | USBF_EP0_IN_EMPTY)) == USBF_EP0_IN_EMPTY, + 0, 10000); + if (ret) + dev_err(ep0->udc->dev, "ep0 flush fifo timed out\n"); + +} + +static void usbf_epn_send_null(struct usbf_ep *epn) +{ + usbf_ep_reg_bitset(epn, USBF_REG_EPN_CONTROL, USBF_EPN_DEND); +} + +static void usbf_epn_send_residue(struct usbf_ep *epn, const void *buf, + unsigned int size) +{ + u32 tmp; + + memcpy(&tmp, buf, size); + usbf_ep_reg_writel(epn, USBF_REG_EPN_WRITE, tmp); + + usbf_ep_reg_clrset(epn, USBF_REG_EPN_CONTROL, + USBF_EPN_DW_MASK, + USBF_EPN_DW(size) | USBF_EPN_DEND); +} + +static int usbf_epn_pio_in(struct usbf_ep *epn, struct usbf_req *req) +{ + unsigned int left; + unsigned int nb; + const void *buf; + + left = req->req.length - req->req.actual; + + if (left == 0) { + if (!req->is_zero_sent) { + if (req->req.length == 0) { + TRACEEP(epn, "ep%d send_null\n", epn->id); + usbf_epn_send_null(epn); + req->is_zero_sent = 1; + return -EINPROGRESS; + } + if ((req->req.actual % epn->ep.maxpacket) == 0) { + if (req->req.zero) { + TRACEEP(epn, "ep%d send_null\n", + epn->id); + usbf_epn_send_null(epn); + req->is_zero_sent = 1; + return -EINPROGRESS; + } + } + } + return 0; + } + + if (left > epn->ep.maxpacket) + left = epn->ep.maxpacket; + + buf = req->req.buf; + buf += req->req.actual; + + nb = left / sizeof(u32); + if (nb) { + usbf_ep_reg_write_rep(epn, USBF_REG_EPN_WRITE, buf, nb); + buf += (nb * sizeof(u32)); + req->req.actual += (nb * sizeof(u32)); + left -= (nb * sizeof(u32)); + } + + if (left) { + usbf_epn_send_residue(epn, buf, left); + req->req.actual += left; + } else { + usbf_ep_reg_clrset(epn, USBF_REG_EPN_CONTROL, + USBF_EPN_DW_MASK, + USBF_EPN_DEND); + } + + TRACEEP(epn, "ep%d send %u/%u\n", epn->id, req->req.actual, + req->req.length); + + return -EINPROGRESS; +} + +static void usbf_epn_enable_in_end_int(struct usbf_ep *epn) +{ + usbf_ep_reg_bitset(epn, USBF_REG_EPN_INT_ENA, USBF_EPN_IN_END_EN); +} + +static int usbf_epn_dma_in(struct usbf_ep *epn, struct usbf_req *req) +{ + unsigned int left; + u32 npkt; + u32 lastpkt; + int ret; + + if (!IS_ALIGNED((uintptr_t)req->req.buf, 4)) { + TRACEEP(epn, "ep%d buf unaligned -> fallback pio\n", epn->id); + return usbf_epn_pio_in(epn, req); + } + + left = req->req.length - req->req.actual; + + switch (req->xfer_step) { + default: + case USBF_XFER_START: + if (left == 0) { + TRACEEP(epn, "ep%d send null\n", epn->id); + usbf_epn_send_null(epn); + req->xfer_step = USBF_XFER_WAIT_END; + break; + } + if (left < 4) { + TRACEEP(epn, "ep%d send residue %u\n", epn->id, left); + usbf_epn_send_residue(epn, + req->req.buf + req->req.actual, left); + req->req.actual += left; + req->xfer_step = USBF_XFER_WAIT_END; + break; + } + + ret = usb_gadget_map_request(&epn->udc->gadget, &req->req, 1); + if (ret < 0) { + dev_err(epn->udc->dev, "usb_gadget_map_request failed (%d)\n", + ret); + return ret; + } + req->is_mapped = 1; + + npkt = DIV_ROUND_UP(left, epn->ep.maxpacket); + lastpkt = (left % epn->ep.maxpacket); + if (lastpkt == 0) + lastpkt = epn->ep.maxpacket; + lastpkt &= ~0x3; /* DMA is done on 32bit units */ + + usbf_ep_dma_reg_writel(epn, USBF_REG_DMA_EPN_DCR2, + USBF_SYS_EPN_MPKT(epn->ep.maxpacket) | USBF_SYS_EPN_LMPKT(lastpkt)); + usbf_ep_dma_reg_writel(epn, USBF_REG_DMA_EPN_TADR, + req->req.dma); + usbf_ep_dma_reg_writel(epn, USBF_REG_DMA_EPN_DCR1, + USBF_SYS_EPN_SET_DMACNT(npkt)); + usbf_ep_dma_reg_bitset(epn, USBF_REG_DMA_EPN_DCR1, + USBF_SYS_EPN_REQEN); + + usbf_ep_reg_writel(epn, USBF_REG_EPN_LEN_DCNT, USBF_EPN_SET_DMACNT(npkt)); + + usbf_ep_reg_bitset(epn, USBF_REG_EPN_CONTROL, USBF_EPN_AUTO); + + /* The end of DMA transfer at the USBF level needs to be handle + * after the detection of the end of DMA transfer at the brige + * level. + * To force this sequence, EPN_IN_END_EN will be set by the + * detection of the end of transfer at bridge level (ie. bridge + * interrupt). + */ + usbf_ep_reg_bitclr(epn, USBF_REG_EPN_INT_ENA, + USBF_EPN_IN_EN | USBF_EPN_IN_END_EN); + epn->bridge_on_dma_end = usbf_epn_enable_in_end_int; + + /* Clear any pending IN_END interrupt */ + usbf_ep_reg_writel(epn, USBF_REG_EPN_STATUS, ~(u32)USBF_EPN_IN_END_INT); + + usbf_ep_reg_writel(epn, USBF_REG_EPN_DMA_CTRL, + USBF_EPN_BURST_SET | USBF_EPN_DMAMODE0); + usbf_ep_reg_bitset(epn, USBF_REG_EPN_DMA_CTRL, + USBF_EPN_DMA_EN); + + req->dma_size = (npkt - 1) * epn->ep.maxpacket + lastpkt; + + TRACEEP(epn, "ep%d dma xfer %zu\n", epn->id, req->dma_size); + + req->xfer_step = USBF_XFER_WAIT_DMA; + break; + + case USBF_XFER_WAIT_DMA: + if (!(epn->status & USBF_EPN_IN_END_INT)) { + TRACEEP(epn, "ep%d dma not done\n", epn->id); + break; + } + TRACEEP(epn, "ep%d dma done\n", epn->id); + + usb_gadget_unmap_request(&epn->udc->gadget, &req->req, 1); + req->is_mapped = 0; + + usbf_ep_reg_bitclr(epn, USBF_REG_EPN_CONTROL, USBF_EPN_AUTO); + + usbf_ep_reg_clrset(epn, USBF_REG_EPN_INT_ENA, + USBF_EPN_IN_END_EN, + USBF_EPN_IN_EN); + + req->req.actual += req->dma_size; + + left = req->req.length - req->req.actual; + if (left) { + usbf_ep_reg_writel(epn, USBF_REG_EPN_STATUS, ~(u32)USBF_EPN_IN_INT); + + TRACEEP(epn, "ep%d send residue %u\n", epn->id, left); + usbf_epn_send_residue(epn, + req->req.buf + req->req.actual, left); + req->req.actual += left; + req->xfer_step = USBF_XFER_WAIT_END; + break; + } + + if (req->req.actual % epn->ep.maxpacket) { + /* last packet was a short packet. Tell the hardware to + * send it right now. + */ + TRACEEP(epn, "ep%d send short\n", epn->id); + + usbf_ep_reg_writel(epn, USBF_REG_EPN_STATUS, + ~(u32)USBF_EPN_IN_INT); + usbf_ep_reg_bitset(epn, USBF_REG_EPN_CONTROL, + USBF_EPN_DEND); + + req->xfer_step = USBF_XFER_WAIT_END; + break; + } + + /* Last packet size was a maxpacket size + * Send null packet if needed + */ + if (req->req.zero) { + req->xfer_step = USBF_XFER_SEND_NULL; + break; + } + + /* No more action to do. Wait for the end of the USB transfer */ + req->xfer_step = USBF_XFER_WAIT_END; + break; + + case USBF_XFER_SEND_NULL: + TRACEEP(epn, "ep%d send null\n", epn->id); + usbf_epn_send_null(epn); + req->xfer_step = USBF_XFER_WAIT_END; + break; + + case USBF_XFER_WAIT_END: + if (!(epn->status & USBF_EPN_IN_INT)) { + TRACEEP(epn, "ep%d end not done\n", epn->id); + break; + } + TRACEEP(epn, "ep%d send done %u/%u\n", epn->id, + req->req.actual, req->req.length); + req->xfer_step = USBF_XFER_START; + return 0; + } + + return -EINPROGRESS; +} + +static void usbf_epn_recv_residue(struct usbf_ep *epn, void *buf, + unsigned int size) +{ + u32 last; + + last = usbf_ep_reg_readl(epn, USBF_REG_EPN_READ); + memcpy(buf, &last, size); +} + +static int usbf_epn_pio_out(struct usbf_ep *epn, struct usbf_req *req) +{ + int req_status = 0; + unsigned int count; + unsigned int recv; + unsigned int left; + unsigned int nb; + void *buf; + + if (epn->status & USBF_EPN_OUT_INT) { + recv = USBF_EPN_GET_LDATA( + usbf_ep_reg_readl(epn, USBF_REG_EPN_LEN_DCNT)); + count = recv; + + buf = req->req.buf; + buf += req->req.actual; + + left = req->req.length - req->req.actual; + + TRACEEP(epn, "ep%d recv %u, left %u, mpkt %u\n", epn->id, + recv, left, epn->ep.maxpacket); + + if (left > epn->ep.maxpacket) + left = epn->ep.maxpacket; + + if (count > left) { + req_status = -EOVERFLOW; + count = left; + } + + if (count) { + nb = count / sizeof(u32); + if (nb) { + usbf_ep_reg_read_rep(epn, USBF_REG_EPN_READ, + buf, nb); + buf += (nb * sizeof(u32)); + req->req.actual += (nb * sizeof(u32)); + count -= (nb * sizeof(u32)); + } + if (count) { + usbf_epn_recv_residue(epn, buf, count); + req->req.actual += count; + } + } + TRACEEP(epn, "ep%d recv %u/%u\n", epn->id, + req->req.actual, req->req.length); + + if (req_status) { + TRACEEP(epn, "ep%d req.status=%d\n", epn->id, + req_status); + req->req.status = req_status; + return 0; + } + + if (recv < epn->ep.maxpacket) { + TRACEEP(epn, "ep%d short packet\n", epn->id); + /* This is a short packet -> It is the end */ + req->req.status = 0; + return 0; + } + + /* Request full -> complete */ + if (req->req.actual == req->req.length) { + req->req.status = 0; + return 0; + } + } + + if (epn->status & USBF_EPN_OUT_NULL_INT) { + /* NULL packet received */ + TRACEEP(epn, "ep%d null packet\n", epn->id); + if (req->req.actual != req->req.length) { + req->req.status = req->req.short_not_ok ? + -EREMOTEIO : 0; + } else { + req->req.status = 0; + } + return 0; + } + + return -EINPROGRESS; +} + +static void usbf_epn_enable_out_end_int(struct usbf_ep *epn) +{ + usbf_ep_reg_bitset(epn, USBF_REG_EPN_INT_ENA, USBF_EPN_OUT_END_EN); +} + +static void usbf_epn_process_queue(struct usbf_ep *epn); + +static void usbf_epn_dma_out_send_dma(struct usbf_ep *epn, dma_addr_t addr, u32 npkt, bool is_short) +{ + usbf_ep_dma_reg_writel(epn, USBF_REG_DMA_EPN_DCR2, USBF_SYS_EPN_MPKT(epn->ep.maxpacket)); + usbf_ep_dma_reg_writel(epn, USBF_REG_DMA_EPN_TADR, addr); + + if (is_short) { + usbf_ep_dma_reg_writel(epn, USBF_REG_DMA_EPN_DCR1, + USBF_SYS_EPN_SET_DMACNT(1) | USBF_SYS_EPN_DIR0); + usbf_ep_dma_reg_bitset(epn, USBF_REG_DMA_EPN_DCR1, + USBF_SYS_EPN_REQEN); + + usbf_ep_reg_writel(epn, USBF_REG_EPN_LEN_DCNT, + USBF_EPN_SET_DMACNT(0)); + + /* The end of DMA transfer at the USBF level needs to be handled + * after the detection of the end of DMA transfer at the brige + * level. + * To force this sequence, enabling the OUT_END interrupt will + * be donee by the detection of the end of transfer at bridge + * level (ie. bridge interrupt). + */ + usbf_ep_reg_bitclr(epn, USBF_REG_EPN_INT_ENA, + USBF_EPN_OUT_EN | USBF_EPN_OUT_NULL_EN | USBF_EPN_OUT_END_EN); + epn->bridge_on_dma_end = usbf_epn_enable_out_end_int; + + /* Clear any pending OUT_END interrupt */ + usbf_ep_reg_writel(epn, USBF_REG_EPN_STATUS, + ~(u32)USBF_EPN_OUT_END_INT); + + usbf_ep_reg_writel(epn, USBF_REG_EPN_DMA_CTRL, + USBF_EPN_STOP_MODE | USBF_EPN_STOP_SET | USBF_EPN_DMAMODE0); + usbf_ep_reg_bitset(epn, USBF_REG_EPN_DMA_CTRL, + USBF_EPN_DMA_EN); + return; + } + + usbf_ep_dma_reg_writel(epn, USBF_REG_DMA_EPN_DCR1, + USBF_SYS_EPN_SET_DMACNT(npkt) | USBF_SYS_EPN_DIR0); + usbf_ep_dma_reg_bitset(epn, USBF_REG_DMA_EPN_DCR1, + USBF_SYS_EPN_REQEN); + + usbf_ep_reg_writel(epn, USBF_REG_EPN_LEN_DCNT, + USBF_EPN_SET_DMACNT(npkt)); + + /* Here, the bridge may or may not generate an interrupt to signal the + * end of DMA transfer. + * Keep only OUT_END interrupt and let handle the bridge later during + * the OUT_END processing. + */ + usbf_ep_reg_clrset(epn, USBF_REG_EPN_INT_ENA, + USBF_EPN_OUT_EN | USBF_EPN_OUT_NULL_EN, + USBF_EPN_OUT_END_EN); + + /* Disable bridge interrupt. It will be renabled later */ + usbf_reg_bitclr(epn->udc, USBF_REG_AHBBINTEN, + USBF_SYS_DMA_ENDINTEN_EPN(epn->id)); + + /* Clear any pending DMA_END interrupt at bridge level */ + usbf_reg_writel(epn->udc, USBF_REG_AHBBINT, + USBF_SYS_DMA_ENDINT_EPN(epn->id)); + + /* Clear any pending OUT_END interrupt */ + usbf_ep_reg_writel(epn, USBF_REG_EPN_STATUS, + ~(u32)USBF_EPN_OUT_END_INT); + + usbf_ep_reg_writel(epn, USBF_REG_EPN_DMA_CTRL, + USBF_EPN_STOP_MODE | USBF_EPN_STOP_SET | USBF_EPN_DMAMODE0 | USBF_EPN_BURST_SET); + usbf_ep_reg_bitset(epn, USBF_REG_EPN_DMA_CTRL, + USBF_EPN_DMA_EN); +} + +static size_t usbf_epn_dma_out_complete_dma(struct usbf_ep *epn, bool is_short) +{ + u32 dmacnt; + u32 tmp; + int ret; + + /* Restore interrupt mask */ + usbf_ep_reg_clrset(epn, USBF_REG_EPN_INT_ENA, + USBF_EPN_OUT_END_EN, + USBF_EPN_OUT_EN | USBF_EPN_OUT_NULL_EN); + + if (is_short) { + /* Nothing more to do when the DMA was for a short packet */ + return 0; + } + + /* Enable the bridge interrupt */ + usbf_reg_bitset(epn->udc, USBF_REG_AHBBINTEN, + USBF_SYS_DMA_ENDINTEN_EPN(epn->id)); + + tmp = usbf_ep_reg_readl(epn, USBF_REG_EPN_LEN_DCNT); + dmacnt = USBF_EPN_GET_DMACNT(tmp); + + if (dmacnt) { + /* Some packet were not received (halted by a short or a null + * packet. + * The bridge never raises an interrupt in this case. + * Wait for the end of transfer at bridge level + */ + ret = readl_poll_timeout_atomic( + epn->dma_regs + USBF_REG_DMA_EPN_DCR1, + tmp, (USBF_SYS_EPN_GET_DMACNT(tmp) == dmacnt), + 0, 10000); + if (ret) { + dev_err(epn->udc->dev, "ep%d wait bridge timed out\n", + epn->id); + } + + usbf_ep_dma_reg_bitclr(epn, USBF_REG_DMA_EPN_DCR1, + USBF_SYS_EPN_REQEN); + + /* The dmacnt value tells how many packet were not transferred + * from the maximum number of packet we set for the DMA transfer. + * Compute the left DMA size based on this value. + */ + return dmacnt * epn->ep.maxpacket; + } + + return 0; +} + +static int usbf_epn_dma_out(struct usbf_ep *epn, struct usbf_req *req) +{ + unsigned int dma_left; + unsigned int count; + unsigned int recv; + unsigned int left; + u32 npkt; + int ret; + + if (!IS_ALIGNED((uintptr_t)req->req.buf, 4)) { + TRACEEP(epn, "ep%d buf unaligned -> fallback pio\n", epn->id); + return usbf_epn_pio_out(epn, req); + } + + switch (req->xfer_step) { + default: + case USBF_XFER_START: + if (epn->status & USBF_EPN_OUT_NULL_INT) { + TRACEEP(epn, "ep%d null packet\n", epn->id); + if (req->req.actual != req->req.length) { + req->req.status = req->req.short_not_ok ? + -EREMOTEIO : 0; + } else { + req->req.status = 0; + } + return 0; + } + + if (!(epn->status & USBF_EPN_OUT_INT)) { + TRACEEP(epn, "ep%d OUT_INT not set -> spurious\n", + epn->id); + break; + } + + recv = USBF_EPN_GET_LDATA( + usbf_ep_reg_readl(epn, USBF_REG_EPN_LEN_DCNT)); + if (!recv) { + TRACEEP(epn, "ep%d recv = 0 -> spurious\n", + epn->id); + break; + } + + left = req->req.length - req->req.actual; + + TRACEEP(epn, "ep%d recv %u, left %u, mpkt %u\n", epn->id, + recv, left, epn->ep.maxpacket); + + if (recv > left) { + dev_err(epn->udc->dev, "ep%d overflow (%u/%u)\n", + epn->id, recv, left); + req->req.status = -EOVERFLOW; + return -EOVERFLOW; + } + + if (recv < epn->ep.maxpacket) { + /* Short packet received */ + TRACEEP(epn, "ep%d short packet\n", epn->id); + if (recv <= 3) { + usbf_epn_recv_residue(epn, + req->req.buf + req->req.actual, recv); + req->req.actual += recv; + + TRACEEP(epn, "ep%d recv done %u/%u\n", epn->id, + req->req.actual, req->req.length); + + req->xfer_step = USBF_XFER_START; + return 0; + } + + ret = usb_gadget_map_request(&epn->udc->gadget, &req->req, 0); + if (ret < 0) { + dev_err(epn->udc->dev, "map request failed (%d)\n", + ret); + return ret; + } + req->is_mapped = 1; + + usbf_epn_dma_out_send_dma(epn, + req->req.dma + req->req.actual, + 1, true); + req->dma_size = recv & ~0x3; + + TRACEEP(epn, "ep%d dma short xfer %zu\n", epn->id, + req->dma_size); + + req->xfer_step = USBF_XFER_WAIT_DMA_SHORT; + break; + } + + ret = usb_gadget_map_request(&epn->udc->gadget, &req->req, 0); + if (ret < 0) { + dev_err(epn->udc->dev, "map request failed (%d)\n", + ret); + return ret; + } + req->is_mapped = 1; + + /* Use the maximum DMA size according to the request buffer. + * We will adjust the received size later at the end of the DMA + * transfer with the left size computed from + * usbf_epn_dma_out_complete_dma(). + */ + npkt = left / epn->ep.maxpacket; + usbf_epn_dma_out_send_dma(epn, + req->req.dma + req->req.actual, + npkt, false); + req->dma_size = npkt * epn->ep.maxpacket; + + TRACEEP(epn, "ep%d dma xfer %zu (%u)\n", epn->id, + req->dma_size, npkt); + + req->xfer_step = USBF_XFER_WAIT_DMA; + break; + + case USBF_XFER_WAIT_DMA_SHORT: + if (!(epn->status & USBF_EPN_OUT_END_INT)) { + TRACEEP(epn, "ep%d dma short not done\n", epn->id); + break; + } + TRACEEP(epn, "ep%d dma short done\n", epn->id); + + usbf_epn_dma_out_complete_dma(epn, true); + + usb_gadget_unmap_request(&epn->udc->gadget, &req->req, 0); + req->is_mapped = 0; + + req->req.actual += req->dma_size; + + recv = USBF_EPN_GET_LDATA( + usbf_ep_reg_readl(epn, USBF_REG_EPN_LEN_DCNT)); + + count = recv & 0x3; + if (count) { + TRACEEP(epn, "ep%d recv residue %u\n", epn->id, + count); + usbf_epn_recv_residue(epn, + req->req.buf + req->req.actual, count); + req->req.actual += count; + } + + TRACEEP(epn, "ep%d recv done %u/%u\n", epn->id, + req->req.actual, req->req.length); + + req->xfer_step = USBF_XFER_START; + return 0; + + case USBF_XFER_WAIT_DMA: + if (!(epn->status & USBF_EPN_OUT_END_INT)) { + TRACEEP(epn, "ep%d dma not done\n", epn->id); + break; + } + TRACEEP(epn, "ep%d dma done\n", epn->id); + + dma_left = usbf_epn_dma_out_complete_dma(epn, false); + if (dma_left) { + /* Adjust the final DMA size with */ + count = req->dma_size - dma_left; + + TRACEEP(epn, "ep%d dma xfer done %u\n", epn->id, count); + + req->req.actual += count; + + if (epn->status & USBF_EPN_OUT_NULL_INT) { + /* DMA was stopped by a null packet reception */ + TRACEEP(epn, "ep%d dma stopped by null pckt\n", + epn->id); + usb_gadget_unmap_request(&epn->udc->gadget, + &req->req, 0); + req->is_mapped = 0; + + usbf_ep_reg_writel(epn, USBF_REG_EPN_STATUS, + ~(u32)USBF_EPN_OUT_NULL_INT); + + if (req->req.actual != req->req.length) { + req->req.status = req->req.short_not_ok ? + -EREMOTEIO : 0; + } else { + req->req.status = 0; + } + TRACEEP(epn, "ep%d recv done %u/%u\n", epn->id, + req->req.actual, req->req.length); + req->xfer_step = USBF_XFER_START; + return 0; + } + + recv = USBF_EPN_GET_LDATA( + usbf_ep_reg_readl(epn, USBF_REG_EPN_LEN_DCNT)); + left = req->req.length - req->req.actual; + if (recv > left) { + dev_err(epn->udc->dev, + "ep%d overflow (%u/%u)\n", epn->id, + recv, left); + req->req.status = -EOVERFLOW; + usb_gadget_unmap_request(&epn->udc->gadget, + &req->req, 0); + req->is_mapped = 0; + + req->xfer_step = USBF_XFER_START; + return -EOVERFLOW; + } + + if (recv > 3) { + usbf_epn_dma_out_send_dma(epn, + req->req.dma + req->req.actual, + 1, true); + req->dma_size = recv & ~0x3; + + TRACEEP(epn, "ep%d dma short xfer %zu\n", epn->id, + req->dma_size); + + req->xfer_step = USBF_XFER_WAIT_DMA_SHORT; + break; + } + + usb_gadget_unmap_request(&epn->udc->gadget, &req->req, 0); + req->is_mapped = 0; + + count = recv & 0x3; + if (count) { + TRACEEP(epn, "ep%d recv residue %u\n", epn->id, + count); + usbf_epn_recv_residue(epn, + req->req.buf + req->req.actual, count); + req->req.actual += count; + } + + TRACEEP(epn, "ep%d recv done %u/%u\n", epn->id, + req->req.actual, req->req.length); + + req->xfer_step = USBF_XFER_START; + return 0; + } + + /* Process queue at bridge interrupt only */ + usbf_ep_reg_bitclr(epn, USBF_REG_EPN_INT_ENA, + USBF_EPN_OUT_END_EN | USBF_EPN_OUT_EN | USBF_EPN_OUT_NULL_EN); + epn->status = 0; + epn->bridge_on_dma_end = usbf_epn_process_queue; + + req->xfer_step = USBF_XFER_WAIT_BRIDGE; + break; + + case USBF_XFER_WAIT_BRIDGE: + TRACEEP(epn, "ep%d bridge transfers done\n", epn->id); + + /* Restore interrupt mask */ + usbf_ep_reg_clrset(epn, USBF_REG_EPN_INT_ENA, + USBF_EPN_OUT_END_EN, + USBF_EPN_OUT_EN | USBF_EPN_OUT_NULL_EN); + + usb_gadget_unmap_request(&epn->udc->gadget, &req->req, 0); + req->is_mapped = 0; + + req->req.actual += req->dma_size; + + req->xfer_step = USBF_XFER_START; + left = req->req.length - req->req.actual; + if (!left) { + /* No more data can be added to the buffer */ + TRACEEP(epn, "ep%d recv done %u/%u\n", epn->id, + req->req.actual, req->req.length); + return 0; + } + TRACEEP(epn, "ep%d recv done %u/%u, wait more data\n", epn->id, + req->req.actual, req->req.length); + break; + } + + return -EINPROGRESS; +} + +static void usbf_epn_dma_stop(struct usbf_ep *epn) +{ + usbf_ep_dma_reg_bitclr(epn, USBF_REG_DMA_EPN_DCR1, USBF_SYS_EPN_REQEN); + + /* In the datasheet: + * If EP[m]_REQEN = 0b is set during DMA transfer, AHB-EPC stops DMA + * after 1 packet transfer completed. + * Therefore, wait sufficient time for ensuring DMA transfer + * completion. The WAIT time depends on the system, especially AHB + * bus activity + * So arbitrary 10ms would be sufficient. + */ + mdelay(10); + + usbf_ep_reg_bitclr(epn, USBF_REG_EPN_DMA_CTRL, USBF_EPN_DMA_EN); +} + +static void usbf_epn_dma_abort(struct usbf_ep *epn, struct usbf_req *req) +{ + TRACEEP(epn, "ep%d %s dma abort\n", epn->id, epn->is_in ? "in" : "out"); + + epn->bridge_on_dma_end = NULL; + + usbf_epn_dma_stop(epn); + + usb_gadget_unmap_request(&epn->udc->gadget, &req->req, + epn->is_in ? 1 : 0); + req->is_mapped = 0; + + usbf_ep_reg_bitclr(epn, USBF_REG_EPN_CONTROL, USBF_EPN_AUTO); + + if (epn->is_in) { + usbf_ep_reg_clrset(epn, USBF_REG_EPN_INT_ENA, + USBF_EPN_IN_END_EN, + USBF_EPN_IN_EN); + } else { + usbf_ep_reg_clrset(epn, USBF_REG_EPN_INT_ENA, + USBF_EPN_OUT_END_EN, + USBF_EPN_OUT_EN | USBF_EPN_OUT_NULL_EN); + } + + /* As dma is stopped, be sure that no DMA interrupt are pending */ + usbf_ep_reg_writel(epn, USBF_REG_EPN_STATUS, + USBF_EPN_IN_END_INT | USBF_EPN_OUT_END_INT); + + usbf_reg_writel(epn->udc, USBF_REG_AHBBINT, USBF_SYS_DMA_ENDINT_EPN(epn->id)); + + /* Enable DMA interrupt the bridge level */ + usbf_reg_bitset(epn->udc, USBF_REG_AHBBINTEN, + USBF_SYS_DMA_ENDINTEN_EPN(epn->id)); + + /* Reset transfer step */ + req->xfer_step = USBF_XFER_START; +} + +static void usbf_epn_fifo_flush(struct usbf_ep *epn) +{ + u32 ctrl; + u32 sts; + int ret; + + TRACEEP(epn, "ep%d %s fifo flush\n", epn->id, epn->is_in ? "in" : "out"); + + ctrl = usbf_ep_reg_readl(epn, USBF_REG_EPN_CONTROL); + usbf_ep_reg_writel(epn, USBF_REG_EPN_CONTROL, ctrl | USBF_EPN_BCLR); + + if (ctrl & USBF_EPN_DIR0) + return; + + ret = readl_poll_timeout_atomic(epn->regs + USBF_REG_EPN_STATUS, sts, + (sts & (USBF_EPN_IN_DATA | USBF_EPN_IN_EMPTY)) == USBF_EPN_IN_EMPTY, + 0, 10000); + if (ret) + dev_err(epn->udc->dev, "ep%d flush fifo timed out\n", epn->id); +} + +static void usbf_ep_req_done(struct usbf_ep *ep, struct usbf_req *req, + int status) +{ + list_del_init(&req->queue); + + if (status) { + req->req.status = status; + } else { + if (req->req.status == -EINPROGRESS) + req->req.status = status; + } + + TRACEEP(ep, "ep%d %s req done length %u/%u, status=%d\n", ep->id, + ep->is_in ? "in" : "out", + req->req.actual, req->req.length, req->req.status); + + if (req->is_mapped) + usbf_epn_dma_abort(ep, req); + + spin_unlock(&ep->udc->lock); + usb_gadget_giveback_request(&ep->ep, &req->req); + spin_lock(&ep->udc->lock); +} + +static void usbf_ep_nuke(struct usbf_ep *ep, int status) +{ + struct usbf_req *req; + + TRACEEP(ep, "ep%d %s nuke status %d\n", ep->id, + ep->is_in ? "in" : "out", + status); + + while (!list_empty(&ep->queue)) { + req = list_first_entry(&ep->queue, struct usbf_req, queue); + usbf_ep_req_done(ep, req, status); + } + + if (ep->id == 0) + usbf_ep0_fifo_flush(ep); + else + usbf_epn_fifo_flush(ep); +} + +static bool usbf_ep_is_stalled(struct usbf_ep *ep) +{ + u32 ctrl; + + if (ep->id == 0) { + ctrl = usbf_ep_reg_readl(ep, USBF_REG_EP0_CONTROL); + return (ctrl & USBF_EP0_STL) ? true : false; + } + + ctrl = usbf_ep_reg_readl(ep, USBF_REG_EPN_CONTROL); + if (ep->is_in) + return (ctrl & USBF_EPN_ISTL) ? true : false; + + return (ctrl & USBF_EPN_OSTL) ? true : false; +} + +static int usbf_epn_start_queue(struct usbf_ep *epn) +{ + struct usbf_req *req; + int ret; + + if (usbf_ep_is_stalled(epn)) + return 0; + + req = list_first_entry_or_null(&epn->queue, struct usbf_req, queue); + + if (epn->is_in) { + if (req && !epn->is_processing) { + ret = epn->dma_regs ? + usbf_epn_dma_in(epn, req) : + usbf_epn_pio_in(epn, req); + if (ret != -EINPROGRESS) { + dev_err(epn->udc->dev, + "queued next request not in progress\n"); + /* The request cannot be completed (ie + * ret == 0) on the first call. + * stall and nuke the endpoint + */ + return ret ? ret : -EIO; + } + } + } else { + if (req) { + /* Clear ONAK to accept OUT tokens */ + usbf_ep_reg_bitclr(epn, USBF_REG_EPN_CONTROL, + USBF_EPN_ONAK); + + /* Enable interrupts */ + usbf_ep_reg_bitset(epn, USBF_REG_EPN_INT_ENA, + USBF_EPN_OUT_INT | USBF_EPN_OUT_NULL_INT); + } else { + /* Disable incoming data and interrupt. + * They will be enable on next usb_eb_queue call + */ + usbf_ep_reg_bitset(epn, USBF_REG_EPN_CONTROL, + USBF_EPN_ONAK); + usbf_ep_reg_bitclr(epn, USBF_REG_EPN_INT_ENA, + USBF_EPN_OUT_INT | USBF_EPN_OUT_NULL_INT); + } + } + return 0; +} + +static int usbf_ep_process_queue(struct usbf_ep *ep) +{ + int (*usbf_ep_xfer)(struct usbf_ep *ep, struct usbf_req *req); + struct usbf_req *req; + int is_processing; + int ret; + + if (ep->is_in) { + usbf_ep_xfer = usbf_ep0_pio_in; + if (ep->id) { + usbf_ep_xfer = ep->dma_regs ? + usbf_epn_dma_in : usbf_epn_pio_in; + } + } else { + usbf_ep_xfer = usbf_ep0_pio_out; + if (ep->id) { + usbf_ep_xfer = ep->dma_regs ? + usbf_epn_dma_out : usbf_epn_pio_out; + } + } + + req = list_first_entry_or_null(&ep->queue, struct usbf_req, queue); + if (!req) { + dev_err(ep->udc->dev, + "no request available for ep%d %s process\n", ep->id, + ep->is_in ? "in" : "out"); + return -ENOENT; + } + + do { + /* Were going to read the FIFO for this current request. + * NAK any other incoming data to avoid a race condition if no + * more request are available. + */ + if (!ep->is_in && ep->id != 0) { + usbf_ep_reg_bitset(ep, USBF_REG_EPN_CONTROL, + USBF_EPN_ONAK); + } + + ret = usbf_ep_xfer(ep, req); + if (ret == -EINPROGRESS) { + if (!ep->is_in && ep->id != 0) { + /* The current request needs more data. + * Allow incoming data + */ + usbf_ep_reg_bitclr(ep, USBF_REG_EPN_CONTROL, + USBF_EPN_ONAK); + } + return ret; + } + + is_processing = ep->is_processing; + ep->is_processing = 1; + usbf_ep_req_done(ep, req, ret); + ep->is_processing = is_processing; + + if (ret) { + /* An error was detected during the request transfer. + * Any pending DMA transfers were aborted by the + * usbf_ep_req_done() call. + * It's time to flush the fifo + */ + if (ep->id == 0) + usbf_ep0_fifo_flush(ep); + else + usbf_epn_fifo_flush(ep); + } + + req = list_first_entry_or_null(&ep->queue, struct usbf_req, + queue); + + if (ep->is_in) + continue; + + if (ep->id != 0) { + if (req) { + /* An other request is available. + * Allow incoming data + */ + usbf_ep_reg_bitclr(ep, USBF_REG_EPN_CONTROL, + USBF_EPN_ONAK); + } else { + /* No request queued. Disable interrupts. + * They will be enabled on usb_ep_queue + */ + usbf_ep_reg_bitclr(ep, USBF_REG_EPN_INT_ENA, + USBF_EPN_OUT_INT | USBF_EPN_OUT_NULL_INT); + } + } + /* Do not recall usbf_ep_xfer() */ + return req ? -EINPROGRESS : 0; + + } while (req); + + return 0; +} + +static void usbf_ep_stall(struct usbf_ep *ep, bool stall) +{ + struct usbf_req *first; + + TRACEEP(ep, "ep%d %s %s\n", ep->id, + ep->is_in ? "in" : "out", + stall ? "stall" : "unstall"); + + if (ep->id == 0) { + if (stall) + usbf_ep_reg_bitset(ep, USBF_REG_EP0_CONTROL, USBF_EP0_STL); + else + usbf_ep_reg_bitclr(ep, USBF_REG_EP0_CONTROL, USBF_EP0_STL); + return; + } + + if (stall) { + if (ep->is_in) + usbf_ep_reg_bitset(ep, USBF_REG_EPN_CONTROL, + USBF_EPN_ISTL); + else + usbf_ep_reg_bitset(ep, USBF_REG_EPN_CONTROL, + USBF_EPN_OSTL | USBF_EPN_OSTL_EN); + } else { + first = list_first_entry_or_null(&ep->queue, struct usbf_req, queue); + if (first && first->is_mapped) { + /* This can appear if the host halts an endpoint using + * SET_FEATURE and then un-halts the endpoint + */ + usbf_epn_dma_abort(ep, first); + } + usbf_epn_fifo_flush(ep); + if (ep->is_in) { + usbf_ep_reg_clrset(ep, USBF_REG_EPN_CONTROL, + USBF_EPN_ISTL, + USBF_EPN_IPIDCLR); + } else { + usbf_ep_reg_clrset(ep, USBF_REG_EPN_CONTROL, + USBF_EPN_OSTL, + USBF_EPN_OSTL_EN | USBF_EPN_OPIDCLR); + } + usbf_epn_start_queue(ep); + } +} + +static void usbf_ep0_enable(struct usbf_ep *ep0) +{ + usbf_ep_reg_writel(ep0, USBF_REG_EP0_CONTROL, USBF_EP0_INAK_EN | USBF_EP0_BCLR); + + usbf_ep_reg_writel(ep0, USBF_REG_EP0_INT_ENA, + USBF_EP0_SETUP_EN | USBF_EP0_STG_START_EN | USBF_EP0_STG_END_EN | + USBF_EP0_OUT_EN | USBF_EP0_OUT_NULL_EN | USBF_EP0_IN_EN); + + ep0->udc->ep0state = EP0_IDLE; + ep0->disabled = 0; + + /* enable interrupts for the ep0 */ + usbf_reg_bitset(ep0->udc, USBF_REG_USB_INT_ENA, USBF_USB_EPN_EN(0)); +} + +static int usbf_epn_enable(struct usbf_ep *epn) +{ + u32 base_addr; + u32 ctrl; + + base_addr = usbf_ep_info[epn->id].base_addr; + usbf_ep_reg_writel(epn, USBF_REG_EPN_PCKT_ADRS, + USBF_EPN_BASEAD(base_addr) | USBF_EPN_MPKT(epn->ep.maxpacket)); + + /* OUT transfer interrupt are enabled during usb_ep_queue */ + if (epn->is_in) { + /* Will be changed in DMA processing */ + usbf_ep_reg_writel(epn, USBF_REG_EPN_INT_ENA, USBF_EPN_IN_EN); + } + + /* Clear, set endpoint direction, set IN/OUT STL, and enable + * Send NAK for Data out as request are not queued yet + */ + ctrl = USBF_EPN_EN | USBF_EPN_BCLR; + if (epn->is_in) + ctrl |= USBF_EPN_OSTL | USBF_EPN_OSTL_EN; + else + ctrl |= USBF_EPN_DIR0 | USBF_EPN_ISTL | USBF_EPN_OSTL_EN | USBF_EPN_ONAK; + usbf_ep_reg_writel(epn, USBF_REG_EPN_CONTROL, ctrl); + + return 0; +} + +static int usbf_ep_enable(struct usb_ep *_ep, + const struct usb_endpoint_descriptor *desc) +{ + struct usbf_ep *ep = container_of(_ep, struct usbf_ep, ep); + struct usbf_udc *udc = ep->udc; + unsigned long flags; + int ret; + + if (ep->id == 0) { + TRACEEP(ep, "ep0 invalid call\n"); + return -EINVAL; + } + + if (!desc || desc->bDescriptorType != USB_DT_ENDPOINT) { + TRACEEP(ep, "ep%d bad descriptor\n", ep->id); + return -EINVAL; + } + + TRACEEP(ep, "ep%d %s mpkts %d\n", ep->id, + usb_endpoint_dir_in(desc) ? "in" : "out", + usb_endpoint_maxp(desc)); + + spin_lock_irqsave(&ep->udc->lock, flags); + ep->is_in = usb_endpoint_dir_in(desc); + ep->ep.maxpacket = usb_endpoint_maxp(desc); + + ret = usbf_epn_enable(ep); + if (ret) + goto end; + + ep->disabled = 0; + + /* enable interrupts for this endpoint */ + usbf_reg_bitset(udc, USBF_REG_USB_INT_ENA, USBF_USB_EPN_EN(ep->id)); + + /* enable DMA interrupt at bridge level if DMA is used */ + if (ep->dma_regs) { + ep->bridge_on_dma_end = NULL; + usbf_reg_bitset(udc, USBF_REG_AHBBINTEN, + USBF_SYS_DMA_ENDINTEN_EPN(ep->id)); + } + + ret = 0; +end: + spin_unlock_irqrestore(&ep->udc->lock, flags); + return ret; +} + +static int usbf_epn_disable(struct usbf_ep *epn) +{ + /* Disable interrupts */ + usbf_ep_reg_writel(epn, USBF_REG_EPN_INT_ENA, 0); + + /* Disable endpoint */ + usbf_ep_reg_bitclr(epn, USBF_REG_EPN_CONTROL, USBF_EPN_EN); + + /* remove anything that was pending */ + usbf_ep_nuke(epn, -ESHUTDOWN); + + return 0; +} + +static int usbf_ep_disable(struct usb_ep *_ep) +{ + struct usbf_ep *ep = container_of(_ep, struct usbf_ep, ep); + struct usbf_udc *udc = ep->udc; + unsigned long flags; + int ret; + + if (ep->id == 0) { + TRACEEP(ep, "ep0 invalid call\n"); + return -EINVAL; + } + + TRACEEP(ep, "ep%d %s mpkts %d\n", ep->id, + ep->is_in ? "in" : "out", ep->ep.maxpacket); + + spin_lock_irqsave(&ep->udc->lock, flags); + ep->disabled = 1; + /* Disable DMA interrupt */ + if (ep->dma_regs) { + usbf_reg_bitclr(udc, USBF_REG_AHBBINTEN, + USBF_SYS_DMA_ENDINTEN_EPN(ep->id)); + ep->bridge_on_dma_end = NULL; + } + /* disable interrupts for this endpoint */ + usbf_reg_bitclr(udc, USBF_REG_USB_INT_ENA, USBF_USB_EPN_EN(ep->id)); + /* and the endpoint itself */ + ret = usbf_epn_disable(ep); + spin_unlock_irqrestore(&ep->udc->lock, flags); + + return ret; +} + +static int usbf_ep0_queue(struct usbf_ep *ep0, struct usbf_req *req, + gfp_t gfp_flags) +{ + int ret; + + req->req.actual = 0; + req->req.status = -EINPROGRESS; + req->is_zero_sent = 0; + + list_add_tail(&req->queue, &ep0->queue); + + if (ep0->udc->ep0state == EP0_IN_STATUS_START_PHASE) + return 0; + + if (!ep0->is_in) + return 0; + + if (ep0->udc->ep0state == EP0_IN_STATUS_PHASE) { + if (req->req.length) { + dev_err(ep0->udc->dev, + "request lng %u for ep0 in status phase\n", + req->req.length); + return -EINVAL; + } + ep0->delayed_status = 0; + } + if (!ep0->is_processing) { + ret = usbf_ep0_pio_in(ep0, req); + if (ret != -EINPROGRESS) { + dev_err(ep0->udc->dev, + "queued request not in progress\n"); + /* The request cannot be completed (ie + * ret == 0) on the first call + */ + return ret ? ret : -EIO; + } + } + + return 0; +} + +static int usbf_epn_queue(struct usbf_ep *ep, struct usbf_req *req, + gfp_t gfp_flags) +{ + int was_empty; + int ret; + + if (ep->disabled) { + dev_err(ep->udc->dev, "ep%d request queue while disable\n", + ep->id); + return -ESHUTDOWN; + } + + req->req.actual = 0; + req->req.status = -EINPROGRESS; + req->is_zero_sent = 0; + req->xfer_step = USBF_XFER_START; + + was_empty = list_empty(&ep->queue); + list_add_tail(&req->queue, &ep->queue); + if (was_empty) { + ret = usbf_epn_start_queue(ep); + if (ret) + return ret; + } + return 0; +} + +static int usbf_ep_queue(struct usb_ep *_ep, struct usb_request *_req, + gfp_t gfp_flags) +{ + struct usbf_req *req = container_of(_req, struct usbf_req, req); + struct usbf_ep *ep = container_of(_ep, struct usbf_ep, ep); + struct usbf_udc *udc = ep->udc; + unsigned long flags; + int ret; + + if (!_req || !_req->buf) { + TRACEEP(ep, "ep%d invalid request\n", ep->id); + return -EINVAL; + } + + if (!udc || !udc->driver) { + TRACEEP(ep, "ep%d invalid device\n", ep->id); + return -EINVAL; + } + + TRACEEP(ep, "ep%d %s req queue length %u, zero %u, short_not_ok %u\n", + ep->id, ep->is_in ? "in" : "out", + req->req.length, req->req.zero, req->req.short_not_ok); + + spin_lock_irqsave(&ep->udc->lock, flags); + if (ep->id == 0) + ret = usbf_ep0_queue(ep, req, gfp_flags); + else + ret = usbf_epn_queue(ep, req, gfp_flags); + spin_unlock_irqrestore(&ep->udc->lock, flags); + return ret; +} + +static int usbf_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) +{ + struct usbf_req *req = container_of(_req, struct usbf_req, req); + struct usbf_ep *ep = container_of(_ep, struct usbf_ep, ep); + unsigned long flags; + int is_processing; + int first; + int ret; + + spin_lock_irqsave(&ep->udc->lock, flags); + + TRACEEP(ep, "ep%d %s req dequeue length %u/%u\n", + ep->id, ep->is_in ? "in" : "out", + req->req.actual, req->req.length); + + first = list_is_first(&req->queue, &ep->queue); + + /* Complete the request but avoid any operation that could be done + * if a new request is queued during the request completion + */ + is_processing = ep->is_processing; + ep->is_processing = 1; + usbf_ep_req_done(ep, req, -ECONNRESET); + ep->is_processing = is_processing; + + if (first) { + /* The first item in the list was dequeued. + * This item could already be submitted to the hardware. + * So, flush the fifo + */ + if (ep->id) + usbf_epn_fifo_flush(ep); + else + usbf_ep0_fifo_flush(ep); + } + + if (ep->id == 0) { + /* We dequeue a request on ep0. On this endpoint, we can have + * 1 request related to the data stage and/or 1 request + * related to the status stage. + * We dequeue one of them and so the USB control transaction + * is no more coherent. The simple way to be consistent after + * dequeuing is to stall and nuke the endpoint and wait the + * next SETUP packet. + */ + usbf_ep_stall(ep, true); + usbf_ep_nuke(ep, -ECONNRESET); + ep->udc->ep0state = EP0_IDLE; + goto end; + } + + if (!first) + goto end; + + ret = usbf_epn_start_queue(ep); + if (ret) { + usbf_ep_stall(ep, true); + usbf_ep_nuke(ep, -EIO); + } +end: + spin_unlock_irqrestore(&ep->udc->lock, flags); + return 0; +} + +static struct usb_request *usbf_ep_alloc_request(struct usb_ep *_ep, + gfp_t gfp_flags) +{ + struct usbf_req *req; + + if (!_ep) + return NULL; + + req = kzalloc(sizeof(*req), gfp_flags); + if (!req) + return NULL; + + INIT_LIST_HEAD(&req->queue); + + return &req->req; +} + +static void usbf_ep_free_request(struct usb_ep *_ep, struct usb_request *_req) +{ + struct usbf_req *req; + unsigned long flags; + struct usbf_ep *ep; + + if (!_ep || !_req) + return; + + req = container_of(_req, struct usbf_req, req); + ep = container_of(_ep, struct usbf_ep, ep); + + spin_lock_irqsave(&ep->udc->lock, flags); + list_del_init(&req->queue); + spin_unlock_irqrestore(&ep->udc->lock, flags); + kfree(req); +} + +static int usbf_ep_set_halt(struct usb_ep *_ep, int halt) +{ + struct usbf_ep *ep = container_of(_ep, struct usbf_ep, ep); + unsigned long flags; + int ret; + + if (ep->id == 0) + return -EINVAL; + + spin_lock_irqsave(&ep->udc->lock, flags); + + if (!list_empty(&ep->queue)) { + ret = -EAGAIN; + goto end; + } + + usbf_ep_stall(ep, halt); + if (!halt) + ep->is_wedged = 0; + + ret = 0; +end: + spin_unlock_irqrestore(&ep->udc->lock, flags); + + return ret; +} + +static int usbf_ep_set_wedge(struct usb_ep *_ep) +{ + struct usbf_ep *ep = container_of(_ep, struct usbf_ep, ep); + unsigned long flags; + int ret; + + if (ep->id == 0) + return -EINVAL; + + spin_lock_irqsave(&ep->udc->lock, flags); + if (!list_empty(&ep->queue)) { + ret = -EAGAIN; + goto end; + } + usbf_ep_stall(ep, 1); + ep->is_wedged = 1; + + ret = 0; +end: + spin_unlock_irqrestore(&ep->udc->lock, flags); + return ret; +} + +static struct usb_ep_ops usbf_ep_ops = { + .enable = usbf_ep_enable, + .disable = usbf_ep_disable, + .queue = usbf_ep_queue, + .dequeue = usbf_ep_dequeue, + .set_halt = usbf_ep_set_halt, + .set_wedge = usbf_ep_set_wedge, + .alloc_request = usbf_ep_alloc_request, + .free_request = usbf_ep_free_request, +}; + +static void usbf_ep0_req_complete(struct usb_ep *_ep, struct usb_request *_req) +{ +} + +static void usbf_ep0_fill_req(struct usbf_ep *ep0, struct usbf_req *req, + void *buf, unsigned int length, + void (*complete)(struct usb_ep *_ep, + struct usb_request *_req)) +{ + if (buf && length) + memcpy(ep0->udc->ep0_buf, buf, length); + + req->req.buf = ep0->udc->ep0_buf; + req->req.length = length; + req->req.dma = 0; + req->req.zero = true; + req->req.complete = complete ? complete : usbf_ep0_req_complete; + req->req.status = -EINPROGRESS; + req->req.context = NULL; + req->req.actual = 0; +} + +static struct usbf_ep *usbf_get_ep_by_addr(struct usbf_udc *udc, u8 address) +{ + struct usbf_ep *ep; + unsigned int i; + + if ((address & USB_ENDPOINT_NUMBER_MASK) == 0) + return &udc->ep[0]; + + for (i = 1; i < ARRAY_SIZE(udc->ep); i++) { + ep = &udc->ep[i]; + + if (!ep->ep.desc) + continue; + + if (ep->ep.desc->bEndpointAddress == address) + return ep; + } + + return NULL; +} + +static int usbf_req_delegate(struct usbf_udc *udc, + const struct usb_ctrlrequest *ctrlrequest) +{ + int ret; + + spin_unlock(&udc->lock); + ret = udc->driver->setup(&udc->gadget, ctrlrequest); + spin_lock(&udc->lock); + if (ret < 0) { + TRACEEP(&udc->ep[0], "udc driver setup failed %d\n", ret); + return ret; + } + if (ret == USB_GADGET_DELAYED_STATUS) { + TRACEEP(&udc->ep[0], "delayed status set\n"); + udc->ep[0].delayed_status = 1; + return 0; + } + return ret; +} + +static int usbf_req_get_status(struct usbf_udc *udc, + const struct usb_ctrlrequest *ctrlrequest) +{ + struct usbf_ep *ep; + u16 status_data; + u16 wLength; + u16 wValue; + u16 wIndex; + + wValue = le16_to_cpu(ctrlrequest->wValue); + wLength = le16_to_cpu(ctrlrequest->wLength); + wIndex = le16_to_cpu(ctrlrequest->wIndex); + + switch (ctrlrequest->bRequestType) { + case USB_DIR_IN | USB_RECIP_DEVICE | USB_TYPE_STANDARD: + if ((wValue != 0) || (wIndex != 0) || (wLength != 2)) + goto delegate; + + status_data = 0; + if (udc->gadget.is_selfpowered) + status_data |= BIT(USB_DEVICE_SELF_POWERED); + + if (udc->is_remote_wakeup) + status_data |= BIT(USB_DEVICE_REMOTE_WAKEUP); + + break; + + case USB_DIR_IN | USB_RECIP_ENDPOINT | USB_TYPE_STANDARD: + if ((wValue != 0) || (wLength != 2)) + goto delegate; + + ep = usbf_get_ep_by_addr(udc, wIndex); + if (!ep) + return -EINVAL; + + status_data = 0; + if (usbf_ep_is_stalled(ep)) + status_data |= cpu_to_le16(1); + break; + + case USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_STANDARD: + if ((wValue != 0) || (wLength != 2)) + goto delegate; + status_data = 0; + break; + + default: + goto delegate; + } + + usbf_ep0_fill_req(&udc->ep[0], &udc->setup_reply, &status_data, + sizeof(status_data), NULL); + usbf_ep0_queue(&udc->ep[0], &udc->setup_reply, GFP_ATOMIC); + + return 0; + +delegate: + return usbf_req_delegate(udc, ctrlrequest); +} + +static int usbf_req_clear_set_feature(struct usbf_udc *udc, + const struct usb_ctrlrequest *ctrlrequest, + bool is_set) +{ + struct usbf_ep *ep; + u16 wLength; + u16 wValue; + u16 wIndex; + + wValue = le16_to_cpu(ctrlrequest->wValue); + wLength = le16_to_cpu(ctrlrequest->wLength); + wIndex = le16_to_cpu(ctrlrequest->wIndex); + + switch (ctrlrequest->bRequestType) { + case USB_DIR_OUT | USB_RECIP_DEVICE: + if ((wIndex != 0) || (wLength != 0)) + goto delegate; + + if (wValue != cpu_to_le16(USB_DEVICE_REMOTE_WAKEUP)) + goto delegate; + + udc->is_remote_wakeup = is_set; + break; + + case USB_DIR_OUT | USB_RECIP_ENDPOINT: + if (wLength != 0) + goto delegate; + + ep = usbf_get_ep_by_addr(udc, wIndex); + if (!ep) + return -EINVAL; + + if ((ep->id == 0) && is_set) { + /* Endpoint 0 cannot be halted (stalled) + * Returning an error code leads to a STALL on this ep0 + * but keep the automate in a consistent state. + */ + return -EINVAL; + } + if (ep->is_wedged && !is_set) { + /* Ignore CLEAR_FEATURE(HALT ENDPOINT) when the + * endpoint is wedged + */ + break; + } + usbf_ep_stall(ep, is_set); + break; + + default: + goto delegate; + } + + return 0; + +delegate: + return usbf_req_delegate(udc, ctrlrequest); +} + +static void usbf_ep0_req_set_address_complete(struct usb_ep *_ep, + struct usb_request *_req) +{ + struct usbf_ep *ep = container_of(_ep, struct usbf_ep, ep); + + /* The status phase of the SET_ADDRESS request is completed ... */ + if (_req->status == 0) { + /* ... without any errors -> Signaled the state to the core. */ + usb_gadget_set_state(&ep->udc->gadget, USB_STATE_ADDRESS); + } + + /* In case of request failure, there is no need to revert the address + * value set to the hardware as the hardware will take care of the + * value only if the status stage is completed normally. + */ +} + +static int usbf_req_set_address(struct usbf_udc *udc, + const struct usb_ctrlrequest *ctrlrequest) +{ + u16 wLength; + u16 wValue; + u16 wIndex; + u32 addr; + + wValue = le16_to_cpu(ctrlrequest->wValue); + wLength = le16_to_cpu(ctrlrequest->wLength); + wIndex = le16_to_cpu(ctrlrequest->wIndex); + + if (ctrlrequest->bRequestType != (USB_DIR_OUT | USB_RECIP_DEVICE)) + goto delegate; + + if ((wIndex != 0) || (wLength != 0) || (wValue > 127)) + return -EINVAL; + + addr = wValue; + /* The hardware will take care of this USB address after the status + * stage of the SET_ADDRESS request is completed normally. + * It is safe to write it now + */ + usbf_reg_writel(udc, USBF_REG_USB_ADDRESS, USBF_USB_SET_USB_ADDR(addr)); + + /* Queued the status request */ + usbf_ep0_fill_req(&udc->ep[0], &udc->setup_reply, NULL, 0, + usbf_ep0_req_set_address_complete); + usbf_ep0_queue(&udc->ep[0], &udc->setup_reply, GFP_ATOMIC); + + return 0; + +delegate: + return usbf_req_delegate(udc, ctrlrequest); +} + +static int usbf_req_set_configuration(struct usbf_udc *udc, + const struct usb_ctrlrequest *ctrlrequest) +{ + u16 wLength; + u16 wValue; + u16 wIndex; + int ret; + + ret = usbf_req_delegate(udc, ctrlrequest); + if (ret) + return ret; + + wValue = le16_to_cpu(ctrlrequest->wValue); + wLength = le16_to_cpu(ctrlrequest->wLength); + wIndex = le16_to_cpu(ctrlrequest->wIndex); + + if ((ctrlrequest->bRequestType != (USB_DIR_OUT | USB_RECIP_DEVICE)) || + (wIndex != 0) || (wLength != 0)) { + /* No error detected by driver->setup() but it is not an USB2.0 + * Ch9 SET_CONFIGURATION. + * Nothing more to do + */ + return 0; + } + + if (wValue & 0x00FF) { + usbf_reg_bitset(udc, USBF_REG_USB_CONTROL, USBF_USB_CONF); + } else { + usbf_reg_bitclr(udc, USBF_REG_USB_CONTROL, USBF_USB_CONF); + /* Go back to Address State */ + spin_unlock(&udc->lock); + usb_gadget_set_state(&udc->gadget, USB_STATE_ADDRESS); + spin_lock(&udc->lock); + } + + return 0; +} + +static int usbf_handle_ep0_setup(struct usbf_ep *ep0) +{ + union { + struct usb_ctrlrequest ctrlreq; + u32 raw[2]; + } crq; + struct usbf_udc *udc = ep0->udc; + int ret; + + /* Read setup data (ie the USB control request) */ + crq.raw[0] = usbf_reg_readl(udc, USBF_REG_SETUP_DATA0); + crq.raw[1] = usbf_reg_readl(udc, USBF_REG_SETUP_DATA1); + + TRACEEP(ep0, + "req%02x.%02x, wValue 0x%04x, wIndex 0x%04x, wLength 0x%04x\n", + crq.ctrlreq.bRequestType, crq.ctrlreq.bRequest, + crq.ctrlreq.wValue, crq.ctrlreq.wIndex, crq.ctrlreq.wLength); + + /* Set current EP0 state according to the received request */ + if (crq.ctrlreq.wLength) { + if (crq.ctrlreq.bRequestType & USB_DIR_IN) { + udc->ep0state = EP0_IN_DATA_PHASE; + usbf_ep_reg_clrset(ep0, USBF_REG_EP0_CONTROL, + USBF_EP0_INAK, + USBF_EP0_INAK_EN); + ep0->is_in = 1; + } else { + udc->ep0state = EP0_OUT_DATA_PHASE; + usbf_ep_reg_bitclr(ep0, USBF_REG_EP0_CONTROL, + USBF_EP0_ONAK); + ep0->is_in = 0; + } + } else { + udc->ep0state = EP0_IN_STATUS_START_PHASE; + ep0->is_in = 1; + } + + /* We starts a new control transfer -> Clear the delayed status flag */ + ep0->delayed_status = 0; + + if ((crq.ctrlreq.bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD) { + /* This is not a USB standard request -> delelate */ + goto delegate; + } + + switch (crq.ctrlreq.bRequest) { + case USB_REQ_GET_STATUS: + ret = usbf_req_get_status(udc, &crq.ctrlreq); + break; + + case USB_REQ_CLEAR_FEATURE: + ret = usbf_req_clear_set_feature(udc, &crq.ctrlreq, false); + break; + + case USB_REQ_SET_FEATURE: + ret = usbf_req_clear_set_feature(udc, &crq.ctrlreq, true); + break; + + case USB_REQ_SET_ADDRESS: + ret = usbf_req_set_address(udc, &crq.ctrlreq); + break; + + case USB_REQ_SET_CONFIGURATION: + ret = usbf_req_set_configuration(udc, &crq.ctrlreq); + break; + + default: + goto delegate; + } + + return ret; + +delegate: + return usbf_req_delegate(udc, &crq.ctrlreq); +} + +static int usbf_handle_ep0_data_status(struct usbf_ep *ep0, + const char *ep0state_name, + enum usbf_ep0state next_ep0state) +{ + struct usbf_udc *udc = ep0->udc; + int ret; + + ret = usbf_ep_process_queue(ep0); + switch (ret) { + case -ENOENT: + dev_err(udc->dev, + "no request available for ep0 %s phase\n", + ep0state_name); + break; + case -EINPROGRESS: + /* More data needs to be processed */ + ret = 0; + break; + case 0: + /* All requests in the queue are processed */ + udc->ep0state = next_ep0state; + break; + default: + dev_err(udc->dev, + "process queue failed for ep0 %s phase (%d)\n", + ep0state_name, ret); + break; + } + return ret; +} + +static int usbf_handle_ep0_out_status_start(struct usbf_ep *ep0) +{ + struct usbf_udc *udc = ep0->udc; + struct usbf_req *req; + + usbf_ep_reg_clrset(ep0, USBF_REG_EP0_CONTROL, + USBF_EP0_ONAK, + USBF_EP0_PIDCLR); + ep0->is_in = 0; + + req = list_first_entry_or_null(&ep0->queue, struct usbf_req, queue); + if (!req) { + usbf_ep0_fill_req(ep0, &udc->setup_reply, NULL, 0, NULL); + usbf_ep0_queue(ep0, &udc->setup_reply, GFP_ATOMIC); + } else { + if (req->req.length) { + dev_err(udc->dev, + "queued request length %u for ep0 out status phase\n", + req->req.length); + } + } + udc->ep0state = EP0_OUT_STATUS_PHASE; + return 0; +} + +static int usbf_handle_ep0_in_status_start(struct usbf_ep *ep0) +{ + struct usbf_udc *udc = ep0->udc; + struct usbf_req *req; + int ret; + + usbf_ep_reg_clrset(ep0, USBF_REG_EP0_CONTROL, + USBF_EP0_INAK, + USBF_EP0_INAK_EN | USBF_EP0_PIDCLR); + ep0->is_in = 1; + + /* Queue request for status if needed */ + req = list_first_entry_or_null(&ep0->queue, struct usbf_req, queue); + if (!req) { + if (ep0->delayed_status) { + TRACEEP(ep0, + "EP0_IN_STATUS_START_PHASE ep0->delayed_status set\n"); + udc->ep0state = EP0_IN_STATUS_PHASE; + return 0; + } + + usbf_ep0_fill_req(ep0, &udc->setup_reply, NULL, + 0, NULL); + usbf_ep0_queue(ep0, &udc->setup_reply, + GFP_ATOMIC); + + req = list_first_entry_or_null(&ep0->queue, struct usbf_req, queue); + } else { + if (req->req.length) { + dev_err(udc->dev, + "queued request length %u for ep0 in status phase\n", + req->req.length); + } + } + + ret = usbf_ep0_pio_in(ep0, req); + if (ret != -EINPROGRESS) { + usbf_ep_req_done(ep0, req, ret); + udc->ep0state = EP0_IN_STATUS_END_PHASE; + return 0; + } + + udc->ep0state = EP0_IN_STATUS_PHASE; + return 0; +} + +static void usbf_ep0_interrupt(struct usbf_ep *ep0) +{ + struct usbf_udc *udc = ep0->udc; + u32 sts, prev_sts; + int prev_ep0state; + int ret; + + ep0->status = usbf_ep_reg_readl(ep0, USBF_REG_EP0_STATUS); + usbf_ep_reg_writel(ep0, USBF_REG_EP0_STATUS, ~ep0->status); + + TRACEEP(ep0, "ep0 status=0x%08x, enable=%08x\n, ctrl=0x%08x\n", + ep0->status, + usbf_ep_reg_readl(ep0, USBF_REG_EP0_INT_ENA), + usbf_ep_reg_readl(ep0, USBF_REG_EP0_CONTROL)); + + sts = ep0->status & (USBF_EP0_SETUP_INT | USBF_EP0_IN_INT | USBF_EP0_OUT_INT | + USBF_EP0_OUT_NULL_INT | USBF_EP0_STG_START_INT | + USBF_EP0_STG_END_INT); + + ret = 0; + do { + TRACEEP(ep0, "udc->ep0state=%d\n", udc->ep0state); + + prev_sts = sts; + prev_ep0state = udc->ep0state; + switch (udc->ep0state) { + case EP0_IDLE: + if (!(sts & USBF_EP0_SETUP_INT)) + break; + + sts &= ~USBF_EP0_SETUP_INT; + TRACEEP(ep0, "handle setup\n"); + ret = usbf_handle_ep0_setup(ep0); + break; + + case EP0_IN_DATA_PHASE: + if (!(sts & USBF_EP0_IN_INT)) + break; + + sts &= ~USBF_EP0_IN_INT; + TRACEEP(ep0, "handle in data phase\n"); + ret = usbf_handle_ep0_data_status(ep0, + "in data", EP0_OUT_STATUS_START_PHASE); + break; + + case EP0_OUT_STATUS_START_PHASE: + if (!(sts & USBF_EP0_STG_START_INT)) + break; + + sts &= ~USBF_EP0_STG_START_INT; + TRACEEP(ep0, "handle out status start phase\n"); + ret = usbf_handle_ep0_out_status_start(ep0); + break; + + case EP0_OUT_STATUS_PHASE: + if (!(sts & (USBF_EP0_OUT_INT | USBF_EP0_OUT_NULL_INT))) + break; + + sts &= ~(USBF_EP0_OUT_INT | USBF_EP0_OUT_NULL_INT); + TRACEEP(ep0, "handle out status phase\n"); + ret = usbf_handle_ep0_data_status(ep0, + "out status", + EP0_OUT_STATUS_END_PHASE); + break; + + case EP0_OUT_STATUS_END_PHASE: + if (!(sts & (USBF_EP0_STG_END_INT | USBF_EP0_SETUP_INT))) + break; + + sts &= ~USBF_EP0_STG_END_INT; + TRACEEP(ep0, "handle out status end phase\n"); + udc->ep0state = EP0_IDLE; + break; + + case EP0_OUT_DATA_PHASE: + if (!(sts & (USBF_EP0_OUT_INT | USBF_EP0_OUT_NULL_INT))) + break; + + sts &= ~(USBF_EP0_OUT_INT | USBF_EP0_OUT_NULL_INT); + TRACEEP(ep0, "handle out data phase\n"); + ret = usbf_handle_ep0_data_status(ep0, + "out data", EP0_IN_STATUS_START_PHASE); + break; + + case EP0_IN_STATUS_START_PHASE: + if (!(sts & USBF_EP0_STG_START_INT)) + break; + + sts &= ~USBF_EP0_STG_START_INT; + TRACEEP(ep0, "handle in status start phase\n"); + ret = usbf_handle_ep0_in_status_start(ep0); + break; + + case EP0_IN_STATUS_PHASE: + if (!(sts & USBF_EP0_IN_INT)) + break; + + sts &= ~USBF_EP0_IN_INT; + TRACEEP(ep0, "handle in status phase\n"); + ret = usbf_handle_ep0_data_status(ep0, + "in status", EP0_IN_STATUS_END_PHASE); + break; + + case EP0_IN_STATUS_END_PHASE: + if (!(sts & (USBF_EP0_STG_END_INT | USBF_EP0_SETUP_INT))) + break; + + sts &= ~USBF_EP0_STG_END_INT; + TRACEEP(ep0, "handle in status end\n"); + udc->ep0state = EP0_IDLE; + break; + + default: + udc->ep0state = EP0_IDLE; + break; + } + + if (ret) { + TRACEEP(ep0, "failed (%d)\n", ret); + /* Failure -> stall. + * This stall state will be automatically cleared when + * the IP receives the next SETUP packet + */ + usbf_ep_stall(ep0, true); + + /* Remove anything that was pending */ + usbf_ep_nuke(ep0, -EPROTO); + + udc->ep0state = EP0_IDLE; + break; + } + + } while ((prev_ep0state != udc->ep0state) || (prev_sts != sts)); + + TRACEEP(ep0, "done udc->ep0state=%d, status=0x%08x. next=0x%08x\n", + udc->ep0state, sts, + usbf_ep_reg_readl(ep0, USBF_REG_EP0_STATUS)); +} + +static void usbf_epn_process_queue(struct usbf_ep *epn) +{ + int ret; + + ret = usbf_ep_process_queue(epn); + switch (ret) { + case -ENOENT: + dev_warn(epn->udc->dev, "ep%d %s, no request available\n", + epn->id, epn->is_in ? "in" : "out"); + break; + case -EINPROGRESS: + /* More data needs to be processed */ + ret = 0; + break; + case 0: + /* All requests in the queue are processed */ + break; + default: + dev_err(epn->udc->dev, "ep%d %s, process queue failed (%d)\n", + epn->id, epn->is_in ? "in" : "out", ret); + break; + } + + if (ret) { + TRACEEP(epn, "ep%d %s failed (%d)\n", epn->id, + epn->is_in ? "in" : "out", ret); + usbf_ep_stall(epn, true); + usbf_ep_nuke(epn, ret); + } +} + +static void usbf_epn_interrupt(struct usbf_ep *epn) +{ + u32 sts; + u32 ena; + + epn->status = usbf_ep_reg_readl(epn, USBF_REG_EPN_STATUS); + ena = usbf_ep_reg_readl(epn, USBF_REG_EPN_INT_ENA); + usbf_ep_reg_writel(epn, USBF_REG_EPN_STATUS, ~(epn->status & ena)); + + TRACEEP(epn, "ep%d %s status=0x%08x, enable=%08x\n, ctrl=0x%08x\n", + epn->id, epn->is_in ? "in" : "out", epn->status, ena, + usbf_ep_reg_readl(epn, USBF_REG_EPN_CONTROL)); + + if (epn->disabled) { + dev_warn(epn->udc->dev, "ep%d %s, interrupt while disabled\n", + epn->id, epn->is_in ? "in" : "out"); + return; + } + + sts = epn->status & ena; + + if (sts & (USBF_EPN_IN_END_INT | USBF_EPN_IN_INT)) { + sts &= ~(USBF_EPN_IN_END_INT | USBF_EPN_IN_INT); + TRACEEP(epn, "ep%d %s process queue (in interrupts)\n", + epn->id, epn->is_in ? "in" : "out"); + usbf_epn_process_queue(epn); + } + + if (sts & (USBF_EPN_OUT_END_INT | USBF_EPN_OUT_INT | USBF_EPN_OUT_NULL_INT)) { + sts &= ~(USBF_EPN_OUT_END_INT | USBF_EPN_OUT_INT | USBF_EPN_OUT_NULL_INT); + TRACEEP(epn, "ep%d %s process queue (out interrupts)\n", + epn->id, epn->is_in ? "in" : "out"); + usbf_epn_process_queue(epn); + } + + TRACEEP(epn, "ep%d %s done status=0x%08x. next=0x%08x\n", + epn->id, epn->is_in ? "in" : "out", + sts, usbf_ep_reg_readl(epn, USBF_REG_EPN_STATUS)); +} + +static void usbf_ep_reset(struct usbf_ep *ep) +{ + ep->status = 0; + /* Remove anything that was pending */ + usbf_ep_nuke(ep, -ESHUTDOWN); +} + +static void usbf_reset(struct usbf_udc *udc) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(udc->ep); i++) { + if (udc->ep[i].disabled) + continue; + + usbf_ep_reset(&udc->ep[i]); + } + + if (usbf_reg_readl(udc, USBF_REG_USB_STATUS) & USBF_USB_SPEED_MODE) + udc->gadget.speed = USB_SPEED_HIGH; + else + udc->gadget.speed = USB_SPEED_FULL; + + /* Remote wakeup feature must be disabled on USB bus reset */ + udc->is_remote_wakeup = false; + + /* Enable endpoint zero */ + usbf_ep0_enable(&udc->ep[0]); + + if (udc->driver) { + /* Signal the reset */ + spin_unlock(&udc->lock); + usb_gadget_udc_reset(&udc->gadget, udc->driver); + spin_lock(&udc->lock); + } +} + +static void usbf_driver_suspend(struct usbf_udc *udc) +{ + if (udc->is_usb_suspended) { + TRACE("already suspended\n"); + return; + } + + TRACE("do usb suspend\n"); + udc->is_usb_suspended = true; + + if (udc->driver && udc->driver->suspend) { + spin_unlock(&udc->lock); + udc->driver->suspend(&udc->gadget); + spin_lock(&udc->lock); + + /* The datasheet tells to set the USB_CONTROL register SUSPEND + * bit when the USB bus suspend is detected. + * This bit stops the clocks (clocks for EPC, SIE, USBPHY) but + * these clocks seems not used only by the USB device. Some + * UARTs can be lost ... + * So, do not set the USB_CONTROL register SUSPEND bit. + */ + } +} + +static void usbf_driver_resume(struct usbf_udc *udc) +{ + if (!udc->is_usb_suspended) + return; + + TRACE("do usb resume\n"); + udc->is_usb_suspended = false; + + if (udc->driver && udc->driver->resume) { + spin_unlock(&udc->lock); + udc->driver->resume(&udc->gadget); + spin_lock(&udc->lock); + } +} + +static irqreturn_t usbf_epc_irq(int irq, void *_udc) +{ + struct usbf_udc *udc = (struct usbf_udc *)_udc; + unsigned long flags; + struct usbf_ep *ep; + u32 int_sts; + u32 int_en; + int i; + + spin_lock_irqsave(&udc->lock, flags); + + int_en = usbf_reg_readl(udc, USBF_REG_USB_INT_ENA); + int_sts = usbf_reg_readl(udc, USBF_REG_USB_INT_STA) & int_en; + usbf_reg_writel(udc, USBF_REG_USB_INT_STA, ~int_sts); + + TRACE("int_sts=0x%08x\n", int_sts); + + if (int_sts & USBF_USB_RSUM_INT) { + TRACE("handle resume\n"); + usbf_driver_resume(udc); + } + + if (int_sts & USBF_USB_USB_RST_INT) { + TRACE("handle bus reset\n"); + usbf_driver_resume(udc); + usbf_reset(udc); + } + + if (int_sts & USBF_USB_SPEED_MODE_INT) { + if (usbf_reg_readl(udc, USBF_REG_USB_STATUS) & USBF_USB_SPEED_MODE) + udc->gadget.speed = USB_SPEED_HIGH; + else + udc->gadget.speed = USB_SPEED_FULL; + TRACE("handle speed change (%s)\n", + udc->gadget.speed == USB_SPEED_HIGH ? "High" : "Full"); + } + + if (int_sts & USBF_USB_EPN_INT(0)) { + usbf_driver_resume(udc); + usbf_ep0_interrupt(&udc->ep[0]); + } + + for (i = 1; i < ARRAY_SIZE(udc->ep); i++) { + ep = &udc->ep[i]; + + if (int_sts & USBF_USB_EPN_INT(i)) { + usbf_driver_resume(udc); + usbf_epn_interrupt(ep); + } + } + + if (int_sts & USBF_USB_SPND_INT) { + TRACE("handle suspend\n"); + usbf_driver_suspend(udc); + } + + spin_unlock_irqrestore(&udc->lock, flags); + + return IRQ_HANDLED; +} + +static irqreturn_t usbf_ahb_epc_irq(int irq, void *_udc) +{ + struct usbf_udc *udc = (struct usbf_udc *)_udc; + unsigned long flags; + struct usbf_ep *epn; + u32 sysbint; + void (*ep_action)(struct usbf_ep *epn); + int i; + + spin_lock_irqsave(&udc->lock, flags); + + /* Read and ack interrupts */ + sysbint = usbf_reg_readl(udc, USBF_REG_AHBBINT); + usbf_reg_writel(udc, USBF_REG_AHBBINT, sysbint); + + if ((sysbint & USBF_SYS_VBUS_INT) == USBF_SYS_VBUS_INT) { + if (usbf_reg_readl(udc, USBF_REG_EPCTR) & USBF_SYS_VBUS_LEVEL) { + TRACE("handle vbus (1)\n"); + spin_unlock(&udc->lock); + usb_udc_vbus_handler(&udc->gadget, true); + usb_gadget_set_state(&udc->gadget, USB_STATE_POWERED); + spin_lock(&udc->lock); + } else { + TRACE("handle vbus (0)\n"); + udc->is_usb_suspended = false; + spin_unlock(&udc->lock); + usb_udc_vbus_handler(&udc->gadget, false); + usb_gadget_set_state(&udc->gadget, + USB_STATE_NOTATTACHED); + spin_lock(&udc->lock); + } + } + + for (i = 1; i < ARRAY_SIZE(udc->ep); i++) { + if (sysbint & USBF_SYS_DMA_ENDINT_EPN(i)) { + epn = &udc->ep[i]; + TRACEEP(epn, + "ep%d handle DMA complete. action=%ps\n", + epn->id, epn->bridge_on_dma_end); + ep_action = epn->bridge_on_dma_end; + if (ep_action) { + epn->bridge_on_dma_end = NULL; + ep_action(epn); + } + } + } + + spin_unlock_irqrestore(&udc->lock, flags); + + return IRQ_HANDLED; +} + +static int usbf_udc_start(struct usb_gadget *gadget, + struct usb_gadget_driver *driver) +{ + struct usbf_udc *udc = container_of(gadget, struct usbf_udc, gadget); + unsigned long flags; + + dev_info(udc->dev, "start (driver '%s')\n", driver->driver.name); + + spin_lock_irqsave(&udc->lock, flags); + + /* hook up the driver */ + udc->driver = driver; + + /* Enable VBUS interrupt */ + usbf_reg_writel(udc, USBF_REG_AHBBINTEN, USBF_SYS_VBUS_INTEN); + + spin_unlock_irqrestore(&udc->lock, flags); + + return 0; +} + +static int usbf_udc_stop(struct usb_gadget *gadget) +{ + struct usbf_udc *udc = container_of(gadget, struct usbf_udc, gadget); + unsigned long flags; + + spin_lock_irqsave(&udc->lock, flags); + + /* Disable VBUS interrupt */ + usbf_reg_writel(udc, USBF_REG_AHBBINTEN, 0); + + udc->driver = NULL; + + spin_unlock_irqrestore(&udc->lock, flags); + + dev_info(udc->dev, "stopped\n"); + + return 0; +} + +static int usbf_get_frame(struct usb_gadget *gadget) +{ + struct usbf_udc *udc = container_of(gadget, struct usbf_udc, gadget); + + return USBF_USB_GET_FRAME(usbf_reg_readl(udc, USBF_REG_USB_ADDRESS)); +} + +static void usbf_attach(struct usbf_udc *udc) +{ + /* Enable USB signal to Function PHY + * D+ signal Pull-up + * Disable endpoint 0, it will be automatically enable when a USB reset + * is received. + * Disable the other endpoints + */ + usbf_reg_clrset(udc, USBF_REG_USB_CONTROL, + USBF_USB_CONNECTB | USBF_USB_DEFAULT | USBF_USB_CONF, + USBF_USB_PUE2); + + /* Enable reset and mode change interrupts */ + usbf_reg_bitset(udc, USBF_REG_USB_INT_ENA, + USBF_USB_USB_RST_EN | USBF_USB_SPEED_MODE_EN | USBF_USB_RSUM_EN | USBF_USB_SPND_EN); +} + +static void usbf_detach(struct usbf_udc *udc) +{ + int i; + + /* Disable interrupts */ + usbf_reg_writel(udc, USBF_REG_USB_INT_ENA, 0); + + for (i = 0; i < ARRAY_SIZE(udc->ep); i++) { + if (udc->ep[i].disabled) + continue; + + usbf_ep_reset(&udc->ep[i]); + } + + /* Disable USB signal to Function PHY + * Do not Pull-up D+ signal + * Disable endpoint 0 + * Disable the other endpoints + */ + usbf_reg_clrset(udc, USBF_REG_USB_CONTROL, + USBF_USB_PUE2 | USBF_USB_DEFAULT | USBF_USB_CONF, + USBF_USB_CONNECTB); +} + +static int usbf_pullup(struct usb_gadget *gadget, int is_on) +{ + struct usbf_udc *udc = container_of(gadget, struct usbf_udc, gadget); + unsigned long flags; + + TRACE("is_on=%d\n", is_on); + + spin_lock_irqsave(&udc->lock, flags); + if (is_on) + usbf_attach(udc); + else + usbf_detach(udc); + spin_unlock_irqrestore(&udc->lock, flags); + + return 0; +} + +static int usbf_udc_set_selfpowered(struct usb_gadget *gadget, + int is_selfpowered) +{ + struct usbf_udc *udc = container_of(gadget, struct usbf_udc, gadget); + unsigned long flags; + + spin_lock_irqsave(&udc->lock, flags); + gadget->is_selfpowered = (is_selfpowered != 0); + spin_unlock_irqrestore(&udc->lock, flags); + + return 0; +} + +static int usbf_udc_wakeup(struct usb_gadget *gadget) +{ + struct usbf_udc *udc = container_of(gadget, struct usbf_udc, gadget); + unsigned long flags; + int ret; + + spin_lock_irqsave(&udc->lock, flags); + + if (!udc->is_remote_wakeup) { + TRACE("remote wakeup not allowed\n"); + ret = -EINVAL; + goto end; + } + + TRACE("do wakeup\n"); + + /* Send the resume signal */ + usbf_reg_bitset(udc, USBF_REG_USB_CONTROL, USBF_USB_RSUM_IN); + usbf_reg_bitclr(udc, USBF_REG_USB_CONTROL, USBF_USB_RSUM_IN); + + ret = 0; +end: + spin_unlock_irqrestore(&udc->lock, flags); + return ret; +} + +static struct usb_gadget_ops usbf_gadget_ops = { + .get_frame = usbf_get_frame, + .pullup = usbf_pullup, + .udc_start = usbf_udc_start, + .udc_stop = usbf_udc_stop, + .set_selfpowered = usbf_udc_set_selfpowered, + .wakeup = usbf_udc_wakeup, +}; + +static int usbf_epn_check(struct usbf_ep *epn) +{ + const char *type_txt; + const char *buf_txt; + int ret = 0; + u32 ctrl; + + ctrl = usbf_ep_reg_readl(epn, USBF_REG_EPN_CONTROL); + + switch (ctrl & USBF_EPN_MODE_MASK) { + case USBF_EPN_MODE_BULK: + type_txt = "bulk"; + if (epn->ep.caps.type_control || epn->ep.caps.type_iso || + !epn->ep.caps.type_bulk || epn->ep.caps.type_int) { + dev_err(epn->udc->dev, + "ep%d caps mismatch, bulk expected\n", epn->id); + ret = -EINVAL; + } + break; + case USBF_EPN_MODE_INTR: + type_txt = "intr"; + if (epn->ep.caps.type_control || epn->ep.caps.type_iso || + epn->ep.caps.type_bulk || !epn->ep.caps.type_int) { + dev_err(epn->udc->dev, + "ep%d caps mismatch, int expected\n", epn->id); + ret = -EINVAL; + } + break; + case USBF_EPN_MODE_ISO: + type_txt = "iso"; + if (epn->ep.caps.type_control || !epn->ep.caps.type_iso || + epn->ep.caps.type_bulk || epn->ep.caps.type_int) { + dev_err(epn->udc->dev, + "ep%d caps mismatch, iso expected\n", epn->id); + ret = -EINVAL; + } + break; + default: + type_txt = "unknown"; + dev_err(epn->udc->dev, "ep%d unknown type\n", epn->id); + ret = -EINVAL; + break; + } + + if (ctrl & USBF_EPN_BUF_TYPE_DOUBLE) { + buf_txt = "double"; + if (!usbf_ep_info[epn->id].is_double) { + dev_err(epn->udc->dev, + "ep%d buffer mismatch, double expected\n", + epn->id); + ret = -EINVAL; + } + } else { + buf_txt = "single"; + if (usbf_ep_info[epn->id].is_double) { + dev_err(epn->udc->dev, + "ep%d buffer mismatch, single expected\n", + epn->id); + ret = -EINVAL; + } + } + + dev_dbg(epn->udc->dev, "ep%d (%s) %s, %s buffer %u, checked %s\n", + epn->id, epn->ep.name, type_txt, buf_txt, + epn->ep.maxpacket_limit, ret ? "failed" : "ok"); + + return ret; +} + +static int usbf_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct usbf_udc *udc; + struct usbf_ep *ep; + int irq; + int ret; + int i; + + udc = devm_kzalloc(dev, sizeof(*udc), GFP_KERNEL); + if (!udc) + return -ENOMEM; + platform_set_drvdata(pdev, udc); + + udc->dev = dev; + spin_lock_init(&udc->lock); + + udc->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(udc->regs)) + return PTR_ERR(udc->regs); + + devm_pm_runtime_enable(&pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); + if (ret < 0) + return ret; + + dev_info(dev, "USBF version: %08x\n", + usbf_reg_readl(udc, USBF_REG_USBSSVER)); + + /* Resetting the PLL is handled via the clock driver as it has common + * registers with USB Host + */ + usbf_reg_bitclr(udc, USBF_REG_EPCTR, USBF_SYS_EPC_RST); + + /* modify in register gadget process */ + udc->gadget.speed = USB_SPEED_FULL; + udc->gadget.max_speed = USB_SPEED_HIGH; + udc->gadget.ops = &usbf_gadget_ops; + + udc->gadget.name = dev->driver->name; + udc->gadget.dev.parent = dev; + udc->gadget.ep0 = &udc->ep[0].ep; + + /* The hardware DMA controller needs dma addresses aligned on 32bit. + * A fallback to pio is done if DMA addresses are not aligned. + */ + udc->gadget.quirk_avoids_skb_reserve = 1; + + INIT_LIST_HEAD(&udc->gadget.ep_list); + /* we have a canned request structure to allow sending packets as reply + * to get_status requests + */ + INIT_LIST_HEAD(&udc->setup_reply.queue); + + for (i = 0; i < ARRAY_SIZE(udc->ep); i++) { + ep = &udc->ep[i]; + + if (!(usbf_reg_readl(udc, USBF_REG_USBSSCONF) & + USBF_SYS_EP_AVAILABLE(i))) { + continue; + } + + INIT_LIST_HEAD(&ep->queue); + + ep->id = i; + ep->disabled = 1; + ep->udc = udc; + ep->ep.ops = &usbf_ep_ops; + ep->ep.name = usbf_ep_info[i].name; + ep->ep.caps = usbf_ep_info[i].caps; + usb_ep_set_maxpacket_limit(&ep->ep, + usbf_ep_info[i].maxpacket_limit); + + if (ep->id == 0) { + ep->regs = ep->udc->regs + USBF_BASE_EP0; + } else { + ep->regs = ep->udc->regs + USBF_BASE_EPN(ep->id - 1); + ret = usbf_epn_check(ep); + if (ret) + return ret; + if (usbf_reg_readl(udc, USBF_REG_USBSSCONF) & + USBF_SYS_DMA_AVAILABLE(i)) { + ep->dma_regs = ep->udc->regs + + USBF_BASE_DMA_EPN(ep->id - 1); + } + list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); + } + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + ret = devm_request_irq(dev, irq, usbf_epc_irq, 0, "usbf-epc", udc); + if (ret) { + dev_err(dev, "cannot request irq %d err %d\n", irq, ret); + return ret; + } + + irq = platform_get_irq(pdev, 1); + if (irq < 0) + return irq; + ret = devm_request_irq(dev, irq, usbf_ahb_epc_irq, 0, "usbf-ahb-epc", udc); + if (ret) { + dev_err(dev, "cannot request irq %d err %d\n", irq, ret); + return ret; + } + + usbf_reg_bitset(udc, USBF_REG_AHBMCTR, USBF_SYS_WBURST_TYPE); + + usbf_reg_bitset(udc, USBF_REG_USB_CONTROL, + USBF_USB_INT_SEL | USBF_USB_SOF_RCV | USBF_USB_SOF_CLK_MODE); + + ret = usb_add_gadget_udc(dev, &udc->gadget); + if (ret) + return ret; + + return 0; +} + +static int usbf_remove(struct platform_device *pdev) +{ + struct usbf_udc *udc = platform_get_drvdata(pdev); + + usb_del_gadget_udc(&udc->gadget); + + pm_runtime_put(&pdev->dev); + + return 0; +} + +static const struct of_device_id usbf_match[] = { + { .compatible = "renesas,rzn1-usbf" }, + {} /* sentinel */ +}; +MODULE_DEVICE_TABLE(of, usbf_match); + +static struct platform_driver udc_driver = { + .driver = { + .name = "usbf_renesas", + .owner = THIS_MODULE, + .of_match_table = usbf_match, + }, + .probe = usbf_probe, + .remove = usbf_remove, +}; + +module_platform_driver(udc_driver); + +MODULE_AUTHOR("Herve Codina "); +MODULE_DESCRIPTION("Renesas R-Car Gen3 & RZ/N1 USB Function driver"); +MODULE_LICENSE("GPL"); From patchwork Wed Dec 7 16:24:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13067331 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 04A5DC63709 for ; Wed, 7 Dec 2022 16:25:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230158AbiLGQZb (ORCPT ); Wed, 7 Dec 2022 11:25:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48754 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230099AbiLGQZL (ORCPT ); Wed, 7 Dec 2022 11:25:11 -0500 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7A57866C9D; Wed, 7 Dec 2022 08:25:02 -0800 (PST) Received: (Authenticated sender: herve.codina@bootlin.com) by mail.gandi.net (Postfix) with ESMTPA id 8174540005; Wed, 7 Dec 2022 16:24:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1670430300; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=TihRoOIIlvWBr2aPxHY68KFlI34LyysIMIjsTZJBegk=; b=phliuoeEnzcMaOBgjmn0khKUXd4Djca6HtKn0flaBs1Z31VbhoSX3XyE6mTOmR/wMf6Or/ a8p4cKEXfV5j/sVaLi3qWaZfPkLRQGT79MDKzBJ9mqwcNXaNKGZRKDvbRE3H4yaL1RBL+3 00UTbiYc95oNwMbnAdPHvZzqLsVw25wkU2uWQKI6zIypiqcRHEQRGZiuif4jI0Ug6yI1Tq OYl6jO/Lv3LvrBXBh1Hdjdt+OValFF5qz2pp3v084/Dhq2MRj3C7LBV3aclBOILbv0iOFG bsHD4BQledwST/XCg4TktGIovxj7AHMrONeOmWNWWM7nr0igSwbYmw/plXsJzw== From: Herve Codina To: Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Herve Codina , Greg Kroah-Hartman , Magnus Damm , Gareth Williams Cc: linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Thomas Petazzoni , Miquel Raynal Subject: [PATCH v3 8/9] ARM: dts: r9a06g032: Add the USBF controller node Date: Wed, 7 Dec 2022 17:24:34 +0100 Message-Id: <20221207162435.1001782-9-herve.codina@bootlin.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221207162435.1001782-1-herve.codina@bootlin.com> References: <20221207162435.1001782-1-herve.codina@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Add the USBF controller available in the r9a06g032 SoC. Signed-off-by: Herve Codina Reviewed-by: Geert Uytterhoeven --- arch/arm/boot/dts/r9a06g032.dtsi | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/arm/boot/dts/r9a06g032.dtsi b/arch/arm/boot/dts/r9a06g032.dtsi index 401c88bcdd51..d3c459537dbb 100644 --- a/arch/arm/boot/dts/r9a06g032.dtsi +++ b/arch/arm/boot/dts/r9a06g032.dtsi @@ -117,6 +117,19 @@ dmamux: dma-router@a0 { }; }; + udc: usb@4001e000 { + compatible = "renesas,r9a06g032-usbf", "renesas,rzn1-usbf"; + reg = <0x4001e000 0x2000>; + interrupts = , + ; + clocks = <&sysctrl R9A06G032_HCLK_USBF>, + <&sysctrl R9A06G032_HCLK_USBPM>; + clock-names = "hclkf", "hclkpm"; + power-domains = <&sysctrl>; + depends-on = <&sysctrl>; + status = "disabled"; + }; + pci_usb: pci@40030000 { compatible = "renesas,pci-r9a06g032", "renesas,pci-rzn1"; device_type = "pci"; From patchwork Wed Dec 7 16:24:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13067332 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 123EFC352A1 for ; Wed, 7 Dec 2022 16:25:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230182AbiLGQZu (ORCPT ); Wed, 7 Dec 2022 11:25:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49008 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229775AbiLGQZ0 (ORCPT ); Wed, 7 Dec 2022 11:25:26 -0500 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::222]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E10A86721F; Wed, 7 Dec 2022 08:25:09 -0800 (PST) Received: (Authenticated sender: herve.codina@bootlin.com) by mail.gandi.net (Postfix) with ESMTPA id ED7324000A; Wed, 7 Dec 2022 16:25:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1670430308; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=qVVPGGJ5wD/Pxteagqvg58bV2zwW32bCcfFwOUVXpsY=; b=InaD6Obosh7+P5c7PmHRZXVJ/tICh/b190U+1Cz1Th3q970arZlVnX0Q05skh4RU5L3vXj 270vVj8yxI/OJg0CrjVu+medqAIrKDRnJmOoy+zQckqWW0lO4EVCRKeUWlKjOL+ARqsIZz oeBjFghpSJ7vsV3g9GtwEOytDP/BtGHrJy78rgD0rcMWLoRq3fs6dEYCnt/aEqMacA/K3r A4B+IiIDge5oFBFmAVmPXCjbU83QMJvg8yEzFfzOvfcPZyv0w3rFL2GCb1Yqh3Pdy4VaQ9 0ahsix94J6YNsgpXwv2VJ4SNk/3sai6KnAMNF5jy/TeUK9ujKrnoHc5lNgw36A== From: Herve Codina To: Geert Uytterhoeven , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Herve Codina , Greg Kroah-Hartman , Magnus Damm , Gareth Williams Cc: linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, Thomas Petazzoni , Miquel Raynal Subject: [PATCH v3 9/9] MAINTAINERS: add the Renesas RZ/N1 USBF controller entry Date: Wed, 7 Dec 2022 17:24:35 +0100 Message-Id: <20221207162435.1001782-10-herve.codina@bootlin.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221207162435.1001782-1-herve.codina@bootlin.com> References: <20221207162435.1001782-1-herve.codina@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org After contributing the driver, add myself as the maintainer for Renesas RZ/N1 USBF controller. Signed-off-by: Herve Codina Reviewed-by: Geert Uytterhoeven --- MAINTAINERS | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 1daadaa4d48b..5bf800b4e166 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -17632,6 +17632,14 @@ S: Maintained F: Documentation/devicetree/bindings/rtc/renesas,rzn1-rtc.yaml F: drivers/rtc/rtc-rzn1.c +RENESAS RZ/N1 USBF CONTROLLER DRIVER +M: Herve Codina +L: linux-renesas-soc@vger.kernel.org +L: linux-usb@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/usb/renesas,rzn1-usbf.yaml +F: drivers/usb/gadget/udc/renesas_usbf.c + RENESAS R-CAR GEN3 & RZ/N1 NAND CONTROLLER DRIVER M: Miquel Raynal L: linux-mtd@lists.infradead.org