From patchwork Sat Dec 18 08:27:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 12685951 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C0A58C433F5 for ; Sat, 18 Dec 2021 08:28:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=kpekc8SZWevUWzqEOyZjlZGufNgA4TTihA1wbfga90o=; b=Vj6WWr6ZvAy8P7 8HKJP4VUktWNKTCGO/dZJZivgjeVm14y8+ZfiLlJCUWTrBNYezSuy9w153781g/QMz1/4hKJjoX9u TkLuT8mfx9gty+K2x2KC+per3FGjqdSd6ECnpHl73BWaRjDalKt/4nT21e/zMnqogBfUUZXFXjjg8 xu8bnugFRBgRPLnf4SARiWsyoUlniFIGUv7FmmqTg+vrQtys9QIEYfVK4DRwb0mRIppPH4sHhxVUQ IqoJCKft/7i0pNGnBcTr6yXKIVXBHOmKi4IYZ7P6lyuy46F/O9yq0QeR8iiH8dkpeccFdHIRwj3Rl bWgBLDPUJaeviy8eJNzg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1myV4q-00DEeo-6k; Sat, 18 Dec 2021 08:28:24 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1myV4e-00DEb4-4N; Sat, 18 Dec 2021 08:28:14 +0000 X-UUID: 5af4264823c94cda9941afc0ccba8f7c-20211218 X-UUID: 5af4264823c94cda9941afc0ccba8f7c-20211218 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 313102676; Sat, 18 Dec 2021 01:28:06 -0700 Received: from mtkmbs07n1.mediatek.inc (172.21.101.16) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sat, 18 Dec 2021 00:28:04 -0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sat, 18 Dec 2021 16:28:03 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Sat, 18 Dec 2021 16:28:02 +0800 From: Chunfeng Yun To: Vinod Koul CC: Chunfeng Yun , Kishon Vijay Abraham I , Rob Herring , Matthias Brugger , , , , , , Eddie Hung Subject: [PATCH v2 2/5] phy: phy-mtk-tphy: add support efuse setting Date: Sat, 18 Dec 2021 16:27:59 +0800 Message-ID: <20211218082802.5256-2-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211218082802.5256-1-chunfeng.yun@mediatek.com> References: <20211218082802.5256-1-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211218_002812_219192_ACCA1444 X-CRM114-Status: GOOD ( 21.55 ) X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org Due to some SoCs have a bit shift issue that will drop a bit for usb3 phy or pcie phy, fix it by adding software efuse reading and setting, but only support it optionally for version 2/3. Signed-off-by: Chunfeng Yun --- v2: changes suggested by Vinod 1. fix typo of version in commit message 2. use dev_dbg() instead of dev_info() --- drivers/phy/mediatek/phy-mtk-tphy.c | 162 ++++++++++++++++++++++++++++ 1 file changed, 162 insertions(+) diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c b/drivers/phy/mediatek/phy-mtk-tphy.c index cdcef865fe9e..98a942c607a6 100644 --- a/drivers/phy/mediatek/phy-mtk-tphy.c +++ b/drivers/phy/mediatek/phy-mtk-tphy.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -41,6 +42,9 @@ #define SSUSB_SIFSLV_V2_U3PHYD 0x200 #define SSUSB_SIFSLV_V2_U3PHYA 0x400 +#define U3P_MISC_REG1 0x04 +#define MR1_EFUSE_AUTO_LOAD_DIS BIT(6) + #define U3P_USBPHYACR0 0x000 #define PA0_RG_U2PLL_FORCE_ON BIT(15) #define PA0_USB20_PLL_PREDIV GENMASK(7, 6) @@ -133,6 +137,8 @@ #define P3C_RG_SWRST_U3_PHYD_FORCE_EN BIT(24) #define U3P_U3_PHYA_REG0 0x000 +#define P3A_RG_IEXT_INTR GENMASK(15, 10) +#define P3A_RG_IEXT_INTR_VAL(x) ((0x3f & (x)) << 10) #define P3A_RG_CLKDRV_OFF GENMASK(3, 2) #define P3A_RG_CLKDRV_OFF_VAL(x) ((0x3 & (x)) << 2) @@ -187,6 +193,19 @@ #define P3D_RG_FWAKE_TH GENMASK(21, 16) #define P3D_RG_FWAKE_TH_VAL(x) ((0x3f & (x)) << 16) +#define U3P_U3_PHYD_IMPCAL0 0x010 +#define P3D_RG_FORCE_TX_IMPEL BIT(31) +#define P3D_RG_TX_IMPEL GENMASK(28, 24) +#define P3D_RG_TX_IMPEL_VAL(x) ((0x1f & (x)) << 24) + +#define U3P_U3_PHYD_IMPCAL1 0x014 +#define P3D_RG_FORCE_RX_IMPEL BIT(31) +#define P3D_RG_RX_IMPEL GENMASK(28, 24) +#define P3D_RG_RX_IMPEL_VAL(x) ((0x1f & (x)) << 24) + +#define U3P_U3_PHYD_RSV 0x054 +#define P3D_RG_EFUSE_AUTO_LOAD_DIS BIT(12) + #define U3P_U3_PHYD_CDR1 0x05c #define P3D_RG_CDR_BIR_LTD1 GENMASK(28, 24) #define P3D_RG_CDR_BIR_LTD1_VAL(x) ((0x1f & (x)) << 24) @@ -307,6 +326,11 @@ struct mtk_phy_pdata { * 48M PLL, fix it by switching PLL to 26M from default 48M */ bool sw_pll_48m_to_26m; + /* + * Some SoCs (e.g. mt8195) drop a bit when use auto load efuse, + * support sw way, also support it for v2/v3 optionally. + */ + bool sw_efuse_supported; enum mtk_phy_version version; }; @@ -336,6 +360,10 @@ struct mtk_phy_instance { struct regmap *type_sw; u32 type_sw_reg; u32 type_sw_index; + u32 efuse_sw_en; + u32 efuse_intr; + u32 efuse_tx_imp; + u32 efuse_rx_imp; int eye_src; int eye_vrt; int eye_term; @@ -1040,6 +1068,130 @@ static int phy_type_set(struct mtk_phy_instance *instance) return 0; } +static int phy_efuse_get(struct mtk_tphy *tphy, struct mtk_phy_instance *instance) +{ + struct device *dev = &instance->phy->dev; + int ret = 0; + + /* tphy v1 doesn't support sw efuse, skip it */ + if (!tphy->pdata->sw_efuse_supported) { + instance->efuse_sw_en = 0; + return 0; + } + + /* software efuse is optional */ + instance->efuse_sw_en = device_property_read_bool(dev, "nvmem-cells"); + if (!instance->efuse_sw_en) + return 0; + + switch (instance->type) { + case PHY_TYPE_USB2: + ret = nvmem_cell_read_variable_le_u32(dev, "intr", &instance->efuse_intr); + if (ret) { + dev_err(dev, "fail to get u2 intr efuse, %d\n", ret); + break; + } + + /* no efuse, ignore it */ + if (!instance->efuse_intr) { + dev_warn(dev, "no u2 intr efuse, but dts enable it\n"); + instance->efuse_sw_en = 0; + break; + } + + dev_dbg(dev, "u2 efuse - intr %x\n", instance->efuse_intr); + break; + + case PHY_TYPE_USB3: + case PHY_TYPE_PCIE: + ret = nvmem_cell_read_variable_le_u32(dev, "intr", &instance->efuse_intr); + if (ret) { + dev_err(dev, "fail to get u3 intr efuse, %d\n", ret); + break; + } + + ret = nvmem_cell_read_variable_le_u32(dev, "rx_imp", &instance->efuse_rx_imp); + if (ret) { + dev_err(dev, "fail to get u3 rx_imp efuse, %d\n", ret); + break; + } + + ret = nvmem_cell_read_variable_le_u32(dev, "tx_imp", &instance->efuse_tx_imp); + if (ret) { + dev_err(dev, "fail to get u3 tx_imp efuse, %d\n", ret); + break; + } + + /* no efuse, ignore it */ + if (!instance->efuse_intr && + !instance->efuse_rx_imp && + !instance->efuse_rx_imp) { + dev_warn(dev, "no u3 intr efuse, but dts enable it\n"); + instance->efuse_sw_en = 0; + break; + } + + dev_dbg(dev, "u3 efuse - intr %x, rx_imp %x, tx_imp %x\n", + instance->efuse_intr, instance->efuse_rx_imp,instance->efuse_tx_imp); + break; + default: + dev_err(dev, "no sw efuse for type %d\n", instance->type); + ret = -EINVAL; + } + + return ret; +} + +static void phy_efuse_set(struct mtk_phy_instance *instance) +{ + struct device *dev = &instance->phy->dev; + struct u2phy_banks *u2_banks = &instance->u2_banks; + struct u3phy_banks *u3_banks = &instance->u3_banks; + u32 tmp; + + if (!instance->efuse_sw_en) + return; + + switch (instance->type) { + case PHY_TYPE_USB2: + tmp = readl(u2_banks->misc + U3P_MISC_REG1); + tmp |= MR1_EFUSE_AUTO_LOAD_DIS; + writel(tmp, u2_banks->misc + U3P_MISC_REG1); + + tmp = readl(u2_banks->com + U3P_USBPHYACR1); + tmp &= ~PA1_RG_INTR_CAL; + tmp |= PA1_RG_INTR_CAL_VAL(instance->efuse_intr); + writel(tmp, u2_banks->com + U3P_USBPHYACR1); + break; + case PHY_TYPE_USB3: + case PHY_TYPE_PCIE: + tmp = readl(u3_banks->phyd + U3P_U3_PHYD_RSV); + tmp |= P3D_RG_EFUSE_AUTO_LOAD_DIS; + writel(tmp, u3_banks->phyd + U3P_U3_PHYD_RSV); + + tmp = readl(u3_banks->phyd + U3P_U3_PHYD_IMPCAL0); + tmp &= ~P3D_RG_TX_IMPEL; + tmp |= P3D_RG_TX_IMPEL_VAL(instance->efuse_tx_imp); + tmp |= P3D_RG_FORCE_TX_IMPEL; + writel(tmp, u3_banks->phyd + U3P_U3_PHYD_IMPCAL0); + + tmp = readl(u3_banks->phyd + U3P_U3_PHYD_IMPCAL1); + tmp &= ~P3D_RG_RX_IMPEL; + tmp |= P3D_RG_RX_IMPEL_VAL(instance->efuse_rx_imp); + tmp |= P3D_RG_FORCE_RX_IMPEL; + writel(tmp, u3_banks->phyd + U3P_U3_PHYD_IMPCAL1); + + tmp = readl(u3_banks->phya + U3P_U3_PHYA_REG0); + tmp &= ~P3A_RG_IEXT_INTR; + tmp |= P3A_RG_IEXT_INTR_VAL(instance->efuse_intr); + writel(tmp, u3_banks->phya + U3P_U3_PHYA_REG0); + break; + default: + dev_warn(dev, "no sw efuse for type %d\n", instance->type); + break; + } +} + static int mtk_phy_init(struct phy *phy) { struct mtk_phy_instance *instance = phy_get_drvdata(phy); @@ -1050,6 +1202,8 @@ static int mtk_phy_init(struct phy *phy) if (ret) return ret; + phy_efuse_set(instance); + switch (instance->type) { case PHY_TYPE_USB2: u2_phy_instance_init(tphy, instance); @@ -1134,6 +1288,7 @@ static struct phy *mtk_phy_xlate(struct device *dev, struct mtk_phy_instance *instance = NULL; struct device_node *phy_np = args->np; int index; + int ret; if (args->args_count != 1) { dev_err(dev, "invalid number of cells in 'phy' property\n"); @@ -1174,6 +1329,10 @@ static struct phy *mtk_phy_xlate(struct device *dev, return ERR_PTR(-EINVAL); } + ret = phy_efuse_get(tphy, instance); + if (ret) + return ERR_PTR(ret); + phy_parse_property(tphy, instance); phy_type_set(instance); @@ -1196,10 +1355,12 @@ static const struct mtk_phy_pdata tphy_v1_pdata = { static const struct mtk_phy_pdata tphy_v2_pdata = { .avoid_rx_sen_degradation = false, + .sw_efuse_supported = true, .version = MTK_PHY_V2, }; static const struct mtk_phy_pdata tphy_v3_pdata = { + .sw_efuse_supported = true, .version = MTK_PHY_V3, }; @@ -1210,6 +1371,7 @@ static const struct mtk_phy_pdata mt8173_pdata = { static const struct mtk_phy_pdata mt8195_pdata = { .sw_pll_48m_to_26m = true, + .sw_efuse_supported = true, .version = MTK_PHY_V3, };