@@ -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
@@ -21,6 +21,7 @@
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
+#include <linux/sys_soc.h>
#include <linux/timex.h>
#include <linux/irq.h>
#include <linux/io.h>
@@ -42,6 +43,7 @@
#include <linux/platform_data/spi-ep93xx.h>
#include <mach/gpio-ep93xx.h>
+#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
@@ -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 Logic 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)
@@ -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 *);
Use the soc bus to report the silicon revision 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 <hsweeten@visionengravers.com> Cc: Ryan Mallon <rmallon@gmail.com> Cc: Alexander Shiyan <shc_work@mail.ru> --- v3: use the full name for the family as suggested by Alexander Shiyan 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(-)