X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=arch%2Farm%2Fmach-versatile%2Fcore.c;h=51d7aeb6a507466edb3a5131e9a3135b5a5e5252;hb=232eaf7f268f765b52170bec42bfa0c5825aa239;hp=bf71507c76fd91602d2513c40f19e06a8740e06b;hpb=6b65cd742823f78a6538491982159098ab5fcae1;p=safe%2Fjmp%2Flinux-2.6 diff --git a/arch/arm/mach-versatile/core.c b/arch/arm/mach-versatile/core.c index bf71507..51d7aeb 100644 --- a/arch/arm/mach-versatile/core.c +++ b/arch/arm/mach-versatile/core.c @@ -26,11 +26,15 @@ #include #include #include - -#include +#include +#include +#include +#include +#include +#include + +#include #include -#include -#include #include #include #include @@ -43,7 +47,8 @@ #include #include #include -#include +#include +#include #include "core.h" #include "clock.h" @@ -54,7 +59,6 @@ * * Setup a VA for the Versatile Vectored Interrupt Controller. */ -#define __io_address(n) __io(IO_ADDRESS(n)) #define VA_VIC_BASE __io_address(VERSATILE_VIC_BASE) #define VA_SIC_BASE __io_address(VERSATILE_SIC_BASE) @@ -93,8 +97,7 @@ sic_handle_irq(unsigned int irq, struct irq_desc *desc) irq += IRQ_SIC_START; - desc = irq_desc + irq; - desc_handle_irq(irq, desc); + generic_handle_irq(irq); } while (status); } @@ -114,7 +117,7 @@ void __init versatile_init_irq(void) { unsigned int i; - vic_init(VA_VIC_BASE, IRQ_VIC_START, ~0); + vic_init(VA_VIC_BASE, IRQ_VIC_START, ~0, 0); set_irq_chained_handler(IRQ_VICSOURCE31, sic_handle_irq); @@ -333,11 +336,24 @@ static struct resource versatile_i2c_resource = { static struct platform_device versatile_i2c_device = { .name = "versatile-i2c", - .id = -1, + .id = 0, .num_resources = 1, .resource = &versatile_i2c_resource, }; +static struct i2c_board_info versatile_i2c_board_info[] = { + { + I2C_BOARD_INFO("ds1338", 0xd0 >> 1), + }, +}; + +static int __init versatile_i2c_init(void) +{ + return i2c_register_board_info(0, versatile_i2c_board_info, + ARRAY_SIZE(versatile_i2c_board_info)); +} +arch_initcall(versatile_i2c_init); + #define VERSATILE_SYSMCI (__io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_MCI_OFFSET) unsigned int mmc_status(struct device *dev) @@ -353,41 +369,84 @@ unsigned int mmc_status(struct device *dev) return readl(VERSATILE_SYSMCI) & mask; } -static struct mmc_platform_data mmc0_plat_data = { +static struct mmci_platform_data mmc0_plat_data = { .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34, .status = mmc_status, + .gpio_wp = -1, + .gpio_cd = -1, }; /* * Clock handling */ -static const struct icst307_params versatile_oscvco_params = { - .ref = 24000, - .vco_max = 200000, +static const struct icst_params versatile_oscvco_params = { + .ref = 24000000, + .vco_max = ICST307_VCO_MAX, + .vco_min = ICST307_VCO_MIN, .vd_min = 4 + 8, .vd_max = 511 + 8, .rd_min = 1 + 2, .rd_max = 127 + 2, + .s2div = icst307_s2div, + .idx2s = icst307_idx2s, }; -static void versatile_oscvco_set(struct clk *clk, struct icst307_vco vco) +static void versatile_oscvco_set(struct clk *clk, struct icst_vco vco) { - void __iomem *sys_lock = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_LOCK_OFFSET; - void __iomem *sys_osc = __io_address(VERSATILE_SYS_BASE) + VERSATILE_SYS_OSCCLCD_OFFSET; + void __iomem *sys = __io_address(VERSATILE_SYS_BASE); + void __iomem *sys_lock = sys + VERSATILE_SYS_LOCK_OFFSET; u32 val; - val = readl(sys_osc) & ~0x7ffff; + val = readl(sys + clk->oscoff) & ~0x7ffff; val |= vco.v | (vco.r << 9) | (vco.s << 16); writel(0xa05f, sys_lock); - writel(val, sys_osc); + writel(val, sys + clk->oscoff); writel(0, sys_lock); } -static struct clk versatile_clcd_clk = { - .name = "CLCDCLK", +static struct clk osc4_clk = { .params = &versatile_oscvco_params, - .setvco = versatile_oscvco_set, + .oscoff = VERSATILE_SYS_OSCCLCD_OFFSET, + .setvco = versatile_oscvco_set, +}; + +/* + * These are fixed clocks. + */ +static struct clk ref24_clk = { + .rate = 24000000, +}; + +static struct clk_lookup lookups[] = { + { /* UART0 */ + .dev_id = "dev:f1", + .clk = &ref24_clk, + }, { /* UART1 */ + .dev_id = "dev:f2", + .clk = &ref24_clk, + }, { /* UART2 */ + .dev_id = "dev:f3", + .clk = &ref24_clk, + }, { /* UART3 */ + .dev_id = "fpga:09", + .clk = &ref24_clk, + }, { /* KMI0 */ + .dev_id = "fpga:06", + .clk = &ref24_clk, + }, { /* KMI1 */ + .dev_id = "fpga:07", + .clk = &ref24_clk, + }, { /* MMC0 */ + .dev_id = "fpga:05", + .clk = &ref24_clk, + }, { /* MMC1 */ + .dev_id = "fpga:0b", + .clk = &ref24_clk, + }, { /* CLCD */ + .dev_id = "dev:20", + .clk = &osc4_clk, + } }; /* @@ -652,6 +711,16 @@ static struct clcd_board clcd_plat_data = { .remove = versatile_clcd_remove, }; +static struct pl061_platform_data gpio0_plat_data = { + .gpio_base = 0, + .irq_base = IRQ_GPIO0_START, +}; + +static struct pl061_platform_data gpio1_plat_data = { + .gpio_base = 8, + .irq_base = IRQ_GPIO1_START, +}; + #define AACI_IRQ { IRQ_AACI, NO_IRQ } #define AACI_DMA { 0x80, 0x81 } #define MMCI0_IRQ { IRQ_MMCI0A,IRQ_SIC_MMCI0B } @@ -714,8 +783,8 @@ AMBA_DEVICE(clcd, "dev:20", CLCD, &clcd_plat_data); AMBA_DEVICE(dmac, "dev:30", DMAC, NULL); AMBA_DEVICE(sctl, "dev:e0", SCTL, NULL); AMBA_DEVICE(wdog, "dev:e1", WATCHDOG, NULL); -AMBA_DEVICE(gpio0, "dev:e4", GPIO0, NULL); -AMBA_DEVICE(gpio1, "dev:e5", GPIO1, NULL); +AMBA_DEVICE(gpio0, "dev:e4", GPIO0, &gpio0_plat_data); +AMBA_DEVICE(gpio1, "dev:e5", GPIO1, &gpio1_plat_data); AMBA_DEVICE(rtc, "dev:e8", RTC, NULL); AMBA_DEVICE(sci0, "dev:f0", SCI, NULL); AMBA_DEVICE(uart0, "dev:f1", UART0, NULL); @@ -785,7 +854,7 @@ void __init versatile_init(void) { int i; - clk_register(&versatile_clcd_clk); + clkdev_add_table(lookups, ARRAY_SIZE(lookups)); platform_device_register(&versatile_flash_device); platform_device_register(&versatile_i2c_device); @@ -828,69 +897,101 @@ void __init versatile_init(void) #define TICKS2USECS(x) ((x) / TICKS_PER_uSEC) #endif -/* - * Returns number of ms since last clock interrupt. Note that interrupts - * will have been disabled by do_gettimeoffset() - */ -static unsigned long versatile_gettimeoffset(void) +static void timer_set_mode(enum clock_event_mode mode, + struct clock_event_device *clk) { - unsigned long ticks1, ticks2, status; + unsigned long ctrl; - /* - * Get the current number of ticks. Note that there is a race - * condition between us reading the timer and checking for - * an interrupt. We get around this by ensuring that the - * counter has not reloaded between our two reads. - */ - ticks2 = readl(TIMER0_VA_BASE + TIMER_VALUE) & 0xffff; - do { - ticks1 = ticks2; - status = __raw_readl(VA_IC_BASE + VIC_RAW_STATUS); - ticks2 = readl(TIMER0_VA_BASE + TIMER_VALUE) & 0xffff; - } while (ticks2 > ticks1); + switch(mode) { + case CLOCK_EVT_MODE_PERIODIC: + writel(TIMER_RELOAD, TIMER0_VA_BASE + TIMER_LOAD); - /* - * Number of ticks since last interrupt. - */ - ticks1 = TIMER_RELOAD - ticks2; + ctrl = TIMER_CTRL_PERIODIC; + ctrl |= TIMER_CTRL_32BIT | TIMER_CTRL_IE | TIMER_CTRL_ENABLE; + break; + case CLOCK_EVT_MODE_ONESHOT: + /* period set, and timer enabled in 'next_event' hook */ + ctrl = TIMER_CTRL_ONESHOT; + ctrl |= TIMER_CTRL_32BIT | TIMER_CTRL_IE; + break; + case CLOCK_EVT_MODE_UNUSED: + case CLOCK_EVT_MODE_SHUTDOWN: + default: + ctrl = 0; + } - /* - * Interrupt pending? If so, we've reloaded once already. - * - * FIXME: Need to check this is effectively timer 0 that expires - */ - if (status & IRQMASK_TIMERINT0_1) - ticks1 += TIMER_RELOAD; + writel(ctrl, TIMER0_VA_BASE + TIMER_CTRL); +} - /* - * Convert the ticks to usecs - */ - return TICKS2USECS(ticks1); +static int timer_set_next_event(unsigned long evt, + struct clock_event_device *unused) +{ + unsigned long ctrl = readl(TIMER0_VA_BASE + TIMER_CTRL); + + writel(evt, TIMER0_VA_BASE + TIMER_LOAD); + writel(ctrl | TIMER_CTRL_ENABLE, TIMER0_VA_BASE + TIMER_CTRL); + + return 0; } +static struct clock_event_device timer0_clockevent = { + .name = "timer0", + .shift = 32, + .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, + .set_mode = timer_set_mode, + .set_next_event = timer_set_next_event, +}; + /* * IRQ handler for the timer */ static irqreturn_t versatile_timer_interrupt(int irq, void *dev_id) { - write_seqlock(&xtime_lock); + struct clock_event_device *evt = &timer0_clockevent; - // ...clear the interrupt writel(1, TIMER0_VA_BASE + TIMER_INTCLR); - timer_tick(); - - write_sequnlock(&xtime_lock); + evt->event_handler(evt); return IRQ_HANDLED; } static struct irqaction versatile_timer_irq = { .name = "Versatile Timer Tick", - .flags = IRQF_DISABLED | IRQF_TIMER, + .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, .handler = versatile_timer_interrupt, }; +static cycle_t versatile_get_cycles(struct clocksource *cs) +{ + return ~readl(TIMER3_VA_BASE + TIMER_VALUE); +} + +static struct clocksource clocksource_versatile = { + .name = "timer3", + .rating = 200, + .read = versatile_get_cycles, + .mask = CLOCKSOURCE_MASK(32), + .shift = 20, + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + +static int __init versatile_clocksource_init(void) +{ + /* setup timer3 as free-running clocksource */ + writel(0, TIMER3_VA_BASE + TIMER_CTRL); + writel(0xffffffff, TIMER3_VA_BASE + TIMER_LOAD); + writel(0xffffffff, TIMER3_VA_BASE + TIMER_VALUE); + writel(TIMER_CTRL_32BIT | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC, + TIMER3_VA_BASE + TIMER_CTRL); + + clocksource_versatile.mult = + clocksource_khz2mult(1000, clocksource_versatile.shift); + clocksource_register(&clocksource_versatile); + + return 0; +} + /* * Set up timer interrupt, and return the current time in seconds. */ @@ -918,18 +1019,25 @@ static void __init versatile_timer_init(void) writel(0, TIMER2_VA_BASE + TIMER_CTRL); writel(0, TIMER3_VA_BASE + TIMER_CTRL); - writel(TIMER_RELOAD, TIMER0_VA_BASE + TIMER_LOAD); - writel(TIMER_RELOAD, TIMER0_VA_BASE + TIMER_VALUE); - writel(TIMER_DIVISOR | TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC | - TIMER_CTRL_IE, TIMER0_VA_BASE + TIMER_CTRL); - /* * Make irqs happen for the system timer */ setup_irq(IRQ_TIMERINT0_1, &versatile_timer_irq); + + versatile_clocksource_init(); + + timer0_clockevent.mult = + div_sc(1000000, NSEC_PER_SEC, timer0_clockevent.shift); + timer0_clockevent.max_delta_ns = + clockevent_delta2ns(0xffffffff, &timer0_clockevent); + timer0_clockevent.min_delta_ns = + clockevent_delta2ns(0xf, &timer0_clockevent); + + timer0_clockevent.cpumask = cpumask_of(0); + clockevents_register_device(&timer0_clockevent); } struct sys_timer versatile_timer = { .init = versatile_timer_init, - .offset = versatile_gettimeoffset, }; +