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authorJohn Crispin <blogic@openwrt.org>2012-04-30 11:33:09 +0200
committerRalf Baechle <ralf@linux-mips.org>2012-05-15 17:49:23 +0200
commit6697c6933048aabe94f0049070f7ec09cd52baa8 (patch)
tree5c155125c4f1daed435c696e5d8aa5bb70d9abd6 /arch/mips
parent215ed2009c83615896ee060c08fe574894f084a6 (diff)
MIPS: lantiq: cleanup reset code
Add 2 new soc specifc handlers and remove superflous pr_notice calls. Signed-off-by: John Crispin <blogic@openwrt.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/3705/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/include/asm/mach-lantiq/lantiq.h3
-rw-r--r--arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h10
-rw-r--r--arch/mips/lantiq/xway/reset.c48
3 files changed, 48 insertions, 13 deletions
diff --git a/arch/mips/include/asm/mach-lantiq/lantiq.h b/arch/mips/include/asm/mach-lantiq/lantiq.h
index ce2f02929d22..7a90190bc387 100644
--- a/arch/mips/include/asm/mach-lantiq/lantiq.h
+++ b/arch/mips/include/asm/mach-lantiq/lantiq.h
@@ -48,7 +48,8 @@ extern spinlock_t ebu_lock;
extern void ltq_disable_irq(struct irq_data *data);
extern void ltq_mask_and_ack_irq(struct irq_data *data);
extern void ltq_enable_irq(struct irq_data *data);
-
+/* find out what bootsource we have */
+extern unsigned char ltq_boot_select(void);
/* find out what caused the last cpu reset */
extern int ltq_reset_cause(void);
#define LTQ_RST_CAUSE_WDTRST 0x20
diff --git a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
index af6c0f063130..15eb4dc6ec03 100644
--- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
+++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
@@ -49,6 +49,16 @@
#define LTQ_ASC1_BASE_ADDR 0x1E100C00
#define LTQ_ASC_SIZE 0x400
+/* BOOT_SEL - find what boot media we have */
+#define BS_EXT_ROM 0x0
+#define BS_FLASH 0x1
+#define BS_MII0 0x2
+#define BS_PCI 0x3
+#define BS_UART1 0x4
+#define BS_SPI 0x5
+#define BS_NAND 0x6
+#define BS_RMII0 0x7
+
/*
* during early_printk no ioremap is possible
* lets use KSEG1 instead
diff --git a/arch/mips/lantiq/xway/reset.c b/arch/mips/lantiq/xway/reset.c
index 8b66bd87f0c1..3327211746ac 100644
--- a/arch/mips/lantiq/xway/reset.c
+++ b/arch/mips/lantiq/xway/reset.c
@@ -11,19 +11,31 @@
#include <linux/ioport.h>
#include <linux/pm.h>
#include <linux/export.h>
+#include <linux/delay.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+
#include <asm/reboot.h>
#include <lantiq_soc.h>
+#include "../prom.h"
+
#define ltq_rcu_w32(x, y) ltq_w32((x), ltq_rcu_membase + (y))
#define ltq_rcu_r32(x) ltq_r32(ltq_rcu_membase + (x))
-/* register definitions */
-#define LTQ_RCU_RST 0x0010
-#define LTQ_RCU_RST_ALL 0x40000000
+/* reset request register */
+#define RCU_RST_REQ 0x0010
+/* reset status register */
+#define RCU_RST_STAT 0x0014
-#define LTQ_RCU_RST_STAT 0x0014
-#define LTQ_RCU_STAT_SHIFT 26
+/* reboot bit */
+#define RCU_RD_SRST BIT(30)
+/* reset cause */
+#define RCU_STAT_SHIFT 26
+/* boot selection */
+#define RCU_BOOT_SEL_SHIFT 26
+#define RCU_BOOT_SEL_MASK 0x7
static struct resource ltq_rcu_resource = {
.name = "rcu",
@@ -38,29 +50,41 @@ static void __iomem *ltq_rcu_membase;
/* This function is used by the watchdog driver */
int ltq_reset_cause(void)
{
- u32 val = ltq_rcu_r32(LTQ_RCU_RST_STAT);
- return val >> LTQ_RCU_STAT_SHIFT;
+ u32 val = ltq_rcu_r32(RCU_RST_STAT);
+ return val >> RCU_STAT_SHIFT;
}
EXPORT_SYMBOL_GPL(ltq_reset_cause);
+/* allow platform code to find out what source we booted from */
+unsigned char ltq_boot_select(void)
+{
+ u32 val = ltq_rcu_r32(RCU_RST_STAT);
+ return (val >> RCU_BOOT_SEL_SHIFT) & RCU_BOOT_SEL_MASK;
+}
+
+/* reset a io domain for u micro seconds */
+void ltq_reset_once(unsigned int module, ulong u)
+{
+ ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) | module, RCU_RST_REQ);
+ udelay(u);
+ ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) & ~module, RCU_RST_REQ);
+}
+
static void ltq_machine_restart(char *command)
{
- pr_notice("System restart\n");
local_irq_disable();
- ltq_rcu_w32(ltq_rcu_r32(LTQ_RCU_RST) | LTQ_RCU_RST_ALL, LTQ_RCU_RST);
+ ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) | RCU_RD_SRST, RCU_RST_REQ);
unreachable();
}
static void ltq_machine_halt(void)
{
- pr_notice("System halted.\n");
local_irq_disable();
unreachable();
}
static void ltq_machine_power_off(void)
{
- pr_notice("Please turn off the power now.\n");
local_irq_disable();
unreachable();
}
@@ -79,7 +103,7 @@ static int __init mips_reboot_setup(void)
ltq_rcu_membase = ioremap_nocache(ltq_rcu_resource.start,
resource_size(&ltq_rcu_resource));
if (!ltq_rcu_membase)
- panic("Failed to remap rcu memory");
+ panic("Failed to remap core memory");
_machine_restart = ltq_machine_restart;
_machine_halt = ltq_machine_halt;