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-rw-r--r--arch/arm/mach-ep93xx/Kconfig1
-rw-r--r--arch/arm/mach-ep93xx/core.c113
-rw-r--r--arch/arm/mach-ep93xx/crunch-bits.S14
-rw-r--r--arch/arm/mach-ep93xx/include/mach/platform.h3
-rw-r--r--arch/arm/mach-ep93xx/include/mach/timex.h5
5 files changed, 124 insertions, 12 deletions
diff --git a/arch/arm/mach-ep93xx/Kconfig b/arch/arm/mach-ep93xx/Kconfig
index 93e54fd4e3d..bec570ae649 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 d95ee28a616..0e571f1749d 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -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>
@@ -44,6 +45,7 @@
#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>
@@ -115,7 +117,7 @@ void __init ep93xx_map_io(void)
#define EP93XX_TIMER4_CLOCK 983040
#define TIMER1_RELOAD ((EP93XX_TIMER123_CLOCK / HZ) - 1)
-#define TIMER4_TICKS_PER_JIFFY DIV_ROUND_CLOSEST(CLOCK_TICK_RATE, HZ)
+#define TIMER4_TICKS_PER_JIFFY DIV_ROUND_CLOSEST(EP93XX_TIMER4_CLOCK, HZ)
static unsigned int last_jiffy_time;
@@ -137,7 +139,7 @@ static irqreturn_t ep93xx_timer_interrupt(int irq, void *dev_id)
static struct irqaction ep93xx_timer_irq = {
.name = "ep93xx timer",
- .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+ .flags = IRQF_TIMER | IRQF_IRQPOLL,
.handler = ep93xx_timer_interrupt,
};
@@ -240,6 +242,7 @@ unsigned int ep93xx_chip_revision(void)
v >>= EP93XX_SYSCON_SYSCFG_REV_SHIFT;
return v;
}
+EXPORT_SYMBOL_GPL(ep93xx_chip_revision);
/*************************************************************************
* EP93xx GPIO
@@ -925,8 +928,108 @@ 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);
@@ -937,6 +1040,8 @@ 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);
@@ -949,6 +1054,8 @@ 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(enum reboot_mode mode, const char *cmd)
diff --git a/arch/arm/mach-ep93xx/crunch-bits.S b/arch/arm/mach-ep93xx/crunch-bits.S
index 0ec9bb48fab..e96923a3017 100644
--- a/arch/arm/mach-ep93xx/crunch-bits.S
+++ b/arch/arm/mach-ep93xx/crunch-bits.S
@@ -16,6 +16,7 @@
#include <asm/ptrace.h>
#include <asm/thread_info.h>
#include <asm/asm-offsets.h>
+#include <asm/assembler.h>
#include <mach/ep93xx-regs.h>
/*
@@ -62,14 +63,16 @@
* r9 = ret_from_exception
* lr = undefined instr exit
*
- * called from prefetch exception handler with interrupts disabled
+ * called from prefetch exception handler with interrupts enabled
*/
ENTRY(crunch_task_enable)
+ inc_preempt_count r10, r3
+
ldr r8, =(EP93XX_APB_VIRT_BASE + 0x00130000) @ syscon addr
ldr r1, [r8, #0x80]
tst r1, #0x00800000 @ access to crunch enabled?
- movne pc, lr @ if so no business here
+ bne 2f @ if so no business here
mov r3, #0xaa @ unlock syscon swlock
str r3, [r8, #0xc0]
orr r1, r1, #0x00800000 @ enable access to crunch
@@ -142,7 +145,7 @@ crunch_save:
teq r0, #0 @ anything to load?
cfldr64eq mvdx0, [r1, #CRUNCH_MVDX0] @ mvdx0 was clobbered
- moveq pc, lr
+ beq 1f
crunch_load:
cfldr64 mvdx0, [r0, #CRUNCH_DSPSC] @ load status word
@@ -190,6 +193,11 @@ crunch_load:
cfldr64 mvdx14, [r0, #CRUNCH_MVDX14]
cfldr64 mvdx15, [r0, #CRUNCH_MVDX15]
+1:
+#ifdef CONFIG_PREEMPT_COUNT
+ get_thread_info r10
+#endif
+2: dec_preempt_count r10, r3
mov pc, lr
/*
diff --git a/arch/arm/mach-ep93xx/include/mach/platform.h b/arch/arm/mach-ep93xx/include/mach/platform.h
index e256e0baec2..4c0bbd97f74 100644
--- a/arch/arm/mach-ep93xx/include/mach/platform.h
+++ b/arch/arm/mach-ep93xx/include/mach/platform.h
@@ -6,6 +6,7 @@
#include <linux/reboot.h>
+struct device;
struct i2c_gpio_platform_data;
struct i2c_board_info;
struct spi_board_info;
@@ -54,7 +55,7 @@ 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(enum reboot_mode, const char *);
diff --git a/arch/arm/mach-ep93xx/include/mach/timex.h b/arch/arm/mach-ep93xx/include/mach/timex.h
deleted file mode 100644
index 6b3503b01fa..00000000000
--- a/arch/arm/mach-ep93xx/include/mach/timex.h
+++ /dev/null
@@ -1,5 +0,0 @@
-/*
- * arch/arm/mach-ep93xx/include/mach/timex.h
- */
-
-#define CLOCK_TICK_RATE 983040
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-13 17:34:24 +0000