msm: Generalize timer register mappings

Allow the timer register to be determined dynamically instead of at
compile time.  Use common virtual addresses for the registers across
all MSM chips, and select the register mappings based on the detected
CPU.

Signed-off-by: David Brown <davidb@codeaurora.org>

1 files changed, 25 insertions, 18 deletions

diff --git a/arch/arm/mach-msm/timer.c b/arch/arm/mach-msm/timer.c
index c105d28b53e..5548b156cff 100644
--- a/arch/arm/mach-msm/timer.c
+++ b/arch/arm/mach-msm/timer.c
@@ -24,10 +24,7 @@
 
 #include <asm/mach/time.h>
 #include <mach/msm_iomap.h>
-
-#ifndef MSM_DGT_BASE
-#define MSM_DGT_BASE (MSM_GPT_BASE + 0x10)
-#endif
+#include <mach/cpu.h>
 
 #define TIMER_MATCH_VAL         0x0000
 #define TIMER_COUNT_VAL         0x0004
@@ -52,14 +49,9 @@ enum timer_location {
 	GLOBAL_TIMER = 1,
 };
 
-#ifdef MSM_TMR0_BASE
-#define MSM_TMR_GLOBAL		(MSM_TMR0_BASE - MSM_TMR_BASE)
-#else
-#define MSM_TMR_GLOBAL		0
-#endif
-
 #define MSM_GLOBAL_TIMER MSM_CLOCK_DGT
 
+/* TODO: Remove these ifdefs */
 #if defined(CONFIG_ARCH_QSD8X50)
 #define DGT_HZ (19200000 / 4) /* 19.2 MHz / 4 by default */
 #define MSM_DGT_SHIFT (0)
@@ -177,11 +169,7 @@ static struct msm_clock msm_clocks[] = {
 			.dev_id  = &msm_clocks[0].clockevent,
 			.irq     = INT_GP_TIMER_EXP
 		},
-		.regbase = MSM_GPT_BASE,
 		.freq = GPT_HZ,
-		.local_counter = MSM_GPT_BASE + TIMER_COUNT_VAL,
-		.global_counter = MSM_GPT_BASE + TIMER_COUNT_VAL +
-			MSM_TMR_GLOBAL,
 	},
 	[MSM_CLOCK_DGT] = {
 		.clockevent = {
@@ -206,12 +194,8 @@ static struct msm_clock msm_clocks[] = {
 			.dev_id  = &msm_clocks[1].clockevent,
 			.irq     = INT_DEBUG_TIMER_EXP
 		},
-		.regbase = MSM_DGT_BASE,
 		.freq = DGT_HZ >> MSM_DGT_SHIFT,
 		.shift = MSM_DGT_SHIFT,
-		.local_counter = MSM_DGT_BASE + TIMER_COUNT_VAL,
-		.global_counter = MSM_DGT_BASE + TIMER_COUNT_VAL +
-			MSM_TMR_GLOBAL,
 	}
 };
 
@@ -219,6 +203,25 @@ static void __init msm_timer_init(void)
 {
 	int i;
 	int res;
+	int global_offset = 0;
+
+	if (cpu_is_msm7x01()) {
+		msm_clocks[MSM_CLOCK_GPT].regbase = MSM_CSR_BASE;
+		msm_clocks[MSM_CLOCK_DGT].regbase = MSM_CSR_BASE + 0x10;
+	} else if (cpu_is_msm7x30()) {
+		msm_clocks[MSM_CLOCK_GPT].regbase = MSM_CSR_BASE + 0x04;
+		msm_clocks[MSM_CLOCK_DGT].regbase = MSM_CSR_BASE + 0x24;
+	} else if (cpu_is_qsd8x50()) {
+		msm_clocks[MSM_CLOCK_GPT].regbase = MSM_CSR_BASE;
+		msm_clocks[MSM_CLOCK_DGT].regbase = MSM_CSR_BASE + 0x10;
+	} else if (cpu_is_msm8x60()) {
+		msm_clocks[MSM_CLOCK_GPT].regbase = MSM_TMR_BASE + 0x04;
+		msm_clocks[MSM_CLOCK_DGT].regbase = MSM_TMR_BASE + 0x24;
+
+		/* Use CPU0's timer as the global timer. */
+		global_offset = MSM_TMR0_BASE - MSM_TMR_BASE;
+	} else
+		BUG();
 
 #ifdef CONFIG_ARCH_MSM_SCORPIONMP
 	writel(DGT_CLK_CTL_DIV_4, MSM_TMR_BASE + DGT_CLK_CTL);
@@ -228,6 +231,10 @@ static void __init msm_timer_init(void)
 		struct msm_clock *clock = &msm_clocks[i];
 		struct clock_event_device *ce = &clock->clockevent;
 		struct clocksource *cs = &clock->clocksource;
+
+		clock->local_counter = clock->regbase + TIMER_COUNT_VAL;
+		clock->global_counter = clock->local_counter + global_offset;
+
 		writel(0, clock->regbase + TIMER_ENABLE);
 		writel(0, clock->regbase + TIMER_CLEAR);
 		writel(~0, clock->regbase + TIMER_MATCH_VAL);