diff options
Diffstat (limited to 'arch/arm/mach-msm/timer.c')
| -rw-r--r-- | arch/arm/mach-msm/timer.c | 115 |
1 files changed, 55 insertions, 60 deletions
diff --git a/arch/arm/mach-msm/timer.c b/arch/arm/mach-msm/timer.c index 2969027f02fa..284313f3e02c 100644 --- a/arch/arm/mach-msm/timer.c +++ b/arch/arm/mach-msm/timer.c @@ -30,19 +30,22 @@ #include "common.h" -#define TIMER_MATCH_VAL 0x0000 -#define TIMER_COUNT_VAL 0x0004 -#define TIMER_ENABLE 0x0008 -#define TIMER_ENABLE_CLR_ON_MATCH_EN BIT(1) -#define TIMER_ENABLE_EN BIT(0) -#define TIMER_CLEAR 0x000C -#define DGT_CLK_CTL_DIV_4 0x3 +#define TIMER_MATCH_VAL 0x0000 +#define TIMER_COUNT_VAL 0x0004 +#define TIMER_ENABLE 0x0008 +#define TIMER_ENABLE_CLR_ON_MATCH_EN BIT(1) +#define TIMER_ENABLE_EN BIT(0) +#define TIMER_CLEAR 0x000C +#define DGT_CLK_CTL 0x10 +#define DGT_CLK_CTL_DIV_4 0x3 +#define TIMER_STS_GPT0_CLR_PEND BIT(10) #define GPT_HZ 32768 #define MSM_DGT_SHIFT 5 static void __iomem *event_base; +static void __iomem *sts_base; static irqreturn_t msm_timer_interrupt(int irq, void *dev_id) { @@ -62,8 +65,16 @@ static int msm_timer_set_next_event(unsigned long cycles, { u32 ctrl = readl_relaxed(event_base + TIMER_ENABLE); - writel_relaxed(0, event_base + TIMER_CLEAR); + ctrl &= ~TIMER_ENABLE_EN; + writel_relaxed(ctrl, event_base + TIMER_ENABLE); + + writel_relaxed(ctrl, event_base + TIMER_CLEAR); writel_relaxed(cycles, event_base + TIMER_MATCH_VAL); + + if (sts_base) + while (readl_relaxed(sts_base) & TIMER_STS_GPT0_CLR_PEND) + cpu_relax(); + writel_relaxed(ctrl | TIMER_ENABLE_EN, event_base + TIMER_ENABLE); return 0; } @@ -134,9 +145,6 @@ static int __cpuinit msm_local_timer_setup(struct clock_event_device *evt) if (!smp_processor_id()) return 0; - writel_relaxed(0, event_base + TIMER_ENABLE); - writel_relaxed(0, event_base + TIMER_CLEAR); - writel_relaxed(~0, event_base + TIMER_MATCH_VAL); evt->irq = msm_clockevent.irq; evt->name = "local_timer"; evt->features = msm_clockevent.features; @@ -174,9 +182,6 @@ static void __init msm_timer_init(u32 dgt_hz, int sched_bits, int irq, struct clocksource *cs = &msm_clocksource; int res; - writel_relaxed(0, event_base + TIMER_ENABLE); - writel_relaxed(0, event_base + TIMER_CLEAR); - writel_relaxed(~0, event_base + TIMER_MATCH_VAL); ce->cpumask = cpumask_of(0); ce->irq = irq; @@ -214,13 +219,9 @@ err: } #ifdef CONFIG_OF -static const struct of_device_id msm_dgt_match[] __initconst = { - { .compatible = "qcom,msm-dgt" }, - { }, -}; - -static const struct of_device_id msm_gpt_match[] __initconst = { - { .compatible = "qcom,msm-gpt" }, +static const struct of_device_id msm_timer_match[] __initconst = { + { .compatible = "qcom,kpss-timer" }, + { .compatible = "qcom,scss-timer" }, { }, }; @@ -231,33 +232,29 @@ void __init msm_dt_timer_init(void) int irq; struct resource res; u32 percpu_offset; - void __iomem *dgt_clk_ctl; + void __iomem *base; + void __iomem *cpu0_base; - np = of_find_matching_node(NULL, msm_gpt_match); + np = of_find_matching_node(NULL, msm_timer_match); if (!np) { - pr_err("Can't find GPT DT node\n"); + pr_err("Can't find msm timer DT node\n"); return; } - event_base = of_iomap(np, 0); - if (!event_base) { + base = of_iomap(np, 0); + if (!base) { pr_err("Failed to map event base\n"); return; } - irq = irq_of_parse_and_map(np, 0); + /* We use GPT0 for the clockevent */ + irq = irq_of_parse_and_map(np, 1); if (irq <= 0) { pr_err("Can't get irq\n"); return; } - of_node_put(np); - - np = of_find_matching_node(NULL, msm_dgt_match); - if (!np) { - pr_err("Can't find DGT DT node\n"); - return; - } + /* We use CPU0's DGT for the clocksource */ if (of_property_read_u32(np, "cpu-offset", &percpu_offset)) percpu_offset = 0; @@ -266,45 +263,43 @@ void __init msm_dt_timer_init(void) return; } - source_base = ioremap(res.start + percpu_offset, resource_size(&res)); - if (!source_base) { + cpu0_base = ioremap(res.start + percpu_offset, resource_size(&res)); + if (!cpu0_base) { pr_err("Failed to map source base\n"); return; } - if (!of_address_to_resource(np, 1, &res)) { - dgt_clk_ctl = ioremap(res.start + percpu_offset, - resource_size(&res)); - if (!dgt_clk_ctl) { - pr_err("Failed to map DGT control base\n"); - return; - } - writel_relaxed(DGT_CLK_CTL_DIV_4, dgt_clk_ctl); - iounmap(dgt_clk_ctl); - } - if (of_property_read_u32(np, "clock-frequency", &freq)) { pr_err("Unknown frequency\n"); return; } of_node_put(np); + event_base = base + 0x4; + sts_base = base + 0x88; + source_base = cpu0_base + 0x24; + freq /= 4; + writel_relaxed(DGT_CLK_CTL_DIV_4, source_base + DGT_CLK_CTL); + msm_timer_init(freq, 32, irq, !!percpu_offset); } #endif -static int __init msm_timer_map(phys_addr_t event, phys_addr_t source) +static int __init msm_timer_map(phys_addr_t addr, u32 event, u32 source, + u32 sts) { - event_base = ioremap(event, SZ_64); - if (!event_base) { - pr_err("Failed to map event base\n"); - return 1; - } - source_base = ioremap(source, SZ_64); - if (!source_base) { - pr_err("Failed to map source base\n"); - return 1; + void __iomem *base; + + base = ioremap(addr, SZ_256); + if (!base) { + pr_err("Failed to map timer base\n"); + return -ENOMEM; } + event_base = base + event; + source_base = base + source; + if (sts) + sts_base = base + sts; + return 0; } @@ -312,7 +307,7 @@ void __init msm7x01_timer_init(void) { struct clocksource *cs = &msm_clocksource; - if (msm_timer_map(0xc0100000, 0xc0100010)) + if (msm_timer_map(0xc0100000, 0x0, 0x10, 0x0)) return; cs->read = msm_read_timer_count_shift; cs->mask = CLOCKSOURCE_MASK((32 - MSM_DGT_SHIFT)); @@ -323,14 +318,14 @@ void __init msm7x01_timer_init(void) void __init msm7x30_timer_init(void) { - if (msm_timer_map(0xc0100004, 0xc0100024)) + if (msm_timer_map(0xc0100000, 0x4, 0x24, 0x80)) return; msm_timer_init(24576000 / 4, 32, 1, false); } void __init qsd8x50_timer_init(void) { - if (msm_timer_map(0xAC100000, 0xAC100010)) + if (msm_timer_map(0xAC100000, 0x0, 0x10, 0x34)) return; msm_timer_init(19200000 / 4, 32, 7, false); } |