From patchwork Tue Jun 25 00:53:21 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hartley Sweeten X-Patchwork-Id: 2774061 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 79F759F245 for ; Tue, 25 Jun 2013 00:54:36 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 46FBF201B1 for ; Tue, 25 Jun 2013 00:54:35 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DB83B201AF for ; Tue, 25 Jun 2013 00:54:33 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UrHWd-0005WE-E9; Tue, 25 Jun 2013 00:54:27 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UrHWa-0000o1-Pv; Tue, 25 Jun 2013 00:54:24 +0000 Received: from mail1.bemta12.messagelabs.com ([216.82.251.9]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UrHWW-0000nU-Og for linux-arm-kernel@lists.infradead.org; Tue, 25 Jun 2013 00:54:21 +0000 Received: from [216.82.250.115:25298] by server-9.bemta-12.messagelabs.com id C1/13-32585-51AE8C15; Tue, 25 Jun 2013 00:53:41 +0000 X-Env-Sender: hartleys@visionengravers.com X-Msg-Ref: server-15.tower-127.messagelabs.com!1372121620!9850160!1 X-Originating-IP: [216.166.12.72] X-StarScan-Received: X-StarScan-Version: 6.9.6; banners=-,-,- X-VirusChecked: Checked Received: (qmail 22827 invoked from network); 25 Jun 2013 00:53:40 -0000 Received: from out001.collaborationhost.net (HELO out001.collaborationhost.net) (216.166.12.72) by server-15.tower-127.messagelabs.com with RC4-SHA encrypted SMTP; 25 Jun 2013 00:53:40 -0000 Received: from etch.local (10.2.3.210) by smtp.hostaccount.com (10.2.0.120) with Microsoft SMTP Server (TLS) id 8.3.213.0; Mon, 24 Jun 2013 19:53:39 -0500 From: H Hartley Sweeten To: ARM Kernel Subject: [PATCH v2] arm: ep93xx: use soc bus Date: Mon, 24 Jun 2013 17:53:21 -0700 User-Agent: KMail/1.9.9 MIME-Version: 1.0 Content-Disposition: inline Message-ID: <201306241753.21929.hartleys@visionengravers.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130624_205421_006613_E6056A36 X-CRM114-Status: GOOD ( 16.87 ) X-Spam-Score: -1.9 (-) Cc: Ryan Mallon X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Use the soc bus to report the silicon revidion and Maverick Key. Both are not currently exposed to the user. In addition, fill in the SoC family and machine for completeness. Signed-off-by: H Hartley Sweeten Cc: Ryan Mallon --- v2: address some comments from Ryan Mallon arch/arm/mach-ep93xx/Kconfig | 1 + arch/arm/mach-ep93xx/core.c | 108 ++++++++++++++++++++++++++- arch/arm/mach-ep93xx/include/mach/platform.h | 3 +- 3 files changed, 110 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-ep93xx/Kconfig b/arch/arm/mach-ep93xx/Kconfig index fe3c1fa..91eee1d 100644 --- a/arch/arm/mach-ep93xx/Kconfig +++ b/arch/arm/mach-ep93xx/Kconfig @@ -5,6 +5,7 @@ menu "Cirrus EP93xx Implementation Options" config EP93XX_SOC_COMMON bool default y + select SOC_BUS select LEDS_GPIO_REGISTER config CRUNCH diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c index c49ed3d..04325f2 100644 --- a/arch/arm/mach-ep93xx/core.c +++ b/arch/arm/mach-ep93xx/core.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include #include @@ -42,6 +43,7 @@ #include #include +#include #include #include @@ -895,8 +897,108 @@ void ep93xx_ide_release_gpio(struct platform_device *pdev) } EXPORT_SYMBOL(ep93xx_ide_release_gpio); -void __init ep93xx_init_devices(void) +/************************************************************************* + * EP93xx Security peripheral + *************************************************************************/ + +/* + * The Maverick Key is 256 bits of micro fuses blown at the factory during + * manufacturing to uniquely identify a part. + * + * See: http://arm.cirrus.com/forum/viewtopic.php?t=486&highlight=maverick+key + */ +#define EP93XX_SECURITY_REG(x) (EP93XX_SECURITY_BASE + (x)) +#define EP93XX_SECURITY_SECFLG EP93XX_SECURITY_REG(0x2400) +#define EP93XX_SECURITY_FUSEFLG EP93XX_SECURITY_REG(0x2410) +#define EP93XX_SECURITY_UNIQID EP93XX_SECURITY_REG(0x2440) +#define EP93XX_SECURITY_UNIQCHK EP93XX_SECURITY_REG(0x2450) +#define EP93XX_SECURITY_UNIQVAL EP93XX_SECURITY_REG(0x2460) +#define EP93XX_SECURITY_SECID1 EP93XX_SECURITY_REG(0x2500) +#define EP93XX_SECURITY_SECID2 EP93XX_SECURITY_REG(0x2504) +#define EP93XX_SECURITY_SECCHK1 EP93XX_SECURITY_REG(0x2520) +#define EP93XX_SECURITY_SECCHK2 EP93XX_SECURITY_REG(0x2524) +#define EP93XX_SECURITY_UNIQID2 EP93XX_SECURITY_REG(0x2700) +#define EP93XX_SECURITY_UNIQID3 EP93XX_SECURITY_REG(0x2704) +#define EP93XX_SECURITY_UNIQID4 EP93XX_SECURITY_REG(0x2708) +#define EP93XX_SECURITY_UNIQID5 EP93XX_SECURITY_REG(0x270c) + +static char ep93xx_soc_id[33]; + +static const char __init *ep93xx_get_soc_id(void) { + unsigned int id, id2, id3, id4, id5; + + if (__raw_readl(EP93XX_SECURITY_UNIQVAL) != 1) + return "bad Hamming code"; + + id = __raw_readl(EP93XX_SECURITY_UNIQID); + id2 = __raw_readl(EP93XX_SECURITY_UNIQID2); + id3 = __raw_readl(EP93XX_SECURITY_UNIQID3); + id4 = __raw_readl(EP93XX_SECURITY_UNIQID4); + id5 = __raw_readl(EP93XX_SECURITY_UNIQID5); + + if (id != id2) + return "invalid"; + + snprintf(ep93xx_soc_id, sizeof(ep93xx_soc_id), + "%08x%08x%08x%08x", id2, id3, id4, id5); + + return ep93xx_soc_id; +} + +static const char __init *ep93xx_get_soc_rev(void) +{ + int rev = ep93xx_chip_revision(); + + switch (rev) { + case EP93XX_CHIP_REV_D0: + return "D0"; + case EP93XX_CHIP_REV_D1: + return "D1"; + case EP93XX_CHIP_REV_E0: + return "E0"; + case EP93XX_CHIP_REV_E1: + return "E1"; + case EP93XX_CHIP_REV_E2: + return "E2"; + default: + return "unknown"; + } +} + +static const char __init *ep93xx_get_machine_name(void) +{ + return kasprintf(GFP_KERNEL,"%s", machine_desc->name); +} + +static struct device __init *ep93xx_init_soc(void) +{ + struct soc_device_attribute *soc_dev_attr; + struct soc_device *soc_dev; + + soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); + if (!soc_dev_attr) + return NULL; + + soc_dev_attr->machine = ep93xx_get_machine_name(); + soc_dev_attr->family = "Cirrus EP93xx"; + soc_dev_attr->revision = ep93xx_get_soc_rev(); + soc_dev_attr->soc_id = ep93xx_get_soc_id(); + + soc_dev = soc_device_register(soc_dev_attr); + if (IS_ERR(soc_dev)) { + kfree(soc_dev_attr->machine); + kfree(soc_dev_attr); + return NULL; + } + + return soc_device_to_device(soc_dev); +} + +struct device __init *ep93xx_init_devices(void) +{ + struct device *parent; + /* Disallow access to MaverickCrunch initially */ ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_CPENA); @@ -907,6 +1009,8 @@ void __init ep93xx_init_devices(void) EP93XX_SYSCON_DEVCFG_GONIDE | EP93XX_SYSCON_DEVCFG_HONIDE); + parent = ep93xx_init_soc(); + /* Get the GPIO working early, other devices need it */ platform_device_register(&ep93xx_gpio_device); @@ -919,6 +1023,8 @@ void __init ep93xx_init_devices(void) platform_device_register(&ep93xx_wdt_device); gpio_led_register_device(-1, &ep93xx_led_data); + + return parent; } void ep93xx_restart(char mode, const char *cmd) diff --git a/arch/arm/mach-ep93xx/include/mach/platform.h b/arch/arm/mach-ep93xx/include/mach/platform.h index a14e1b3..067cf1f 100644 --- a/arch/arm/mach-ep93xx/include/mach/platform.h +++ b/arch/arm/mach-ep93xx/include/mach/platform.h @@ -4,6 +4,7 @@ #ifndef __ASSEMBLY__ +struct device; struct i2c_gpio_platform_data; struct i2c_board_info; struct spi_board_info; @@ -52,7 +53,7 @@ void ep93xx_register_ide(void); int ep93xx_ide_acquire_gpio(struct platform_device *pdev); void ep93xx_ide_release_gpio(struct platform_device *pdev); -void ep93xx_init_devices(void); +struct device *ep93xx_init_devices(void); extern void ep93xx_timer_init(void); void ep93xx_restart(char, const char *);