/* * linux/arch/arm/mach-realview/core.c * * Copyright (C) 1999 - 2003 ARM Limited * Copyright (C) 2000 Deep Blue Solutions Ltd * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/init.h> #include <linux/platform_device.h> #include <linux/dma-mapping.h> #include <linux/sysdev.h> #include <linux/interrupt.h> #include <linux/amba/bus.h> #include <linux/amba/clcd.h> #include <linux/clocksource.h> #include <linux/clockchips.h> #include <linux/io.h> #include <asm/system.h> #include <mach/hardware.h> #include <asm/irq.h> #include <asm/leds.h> #include <asm/hardware/arm_timer.h> #include <asm/hardware/icst307.h> #include <asm/mach/arch.h> #include <asm/mach/flash.h> #include <asm/mach/irq.h> #include <asm/mach/map.h> #include <asm/mach/mmc.h> #include <asm/hardware/gic.h> #include "core.h" #include "clock.h" #define REALVIEW_REFCOUNTER (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_24MHz_OFFSET) /* used by entry-macro.S */ void __iomem *gic_cpu_base_addr; /* * This is the RealView sched_clock implementation. This has * a resolution of 41.7ns, and a maximum value of about 179s. */ unsigned long long sched_clock(void) { unsigned long long v; v = (unsigned long long)readl(REALVIEW_REFCOUNTER) * 125; do_div(v, 3); return v; } #define REALVIEW_FLASHCTRL (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_FLASH_OFFSET) static int realview_flash_init(void) { u32 val; val = __raw_readl(REALVIEW_FLASHCTRL); val &= ~REALVIEW_FLASHPROG_FLVPPEN; __raw_writel(val, REALVIEW_FLASHCTRL); return 0; } static void realview_flash_exit(void) { u32 val; val = __raw_readl(REALVIEW_FLASHCTRL); val &= ~REALVIEW_FLASHPROG_FLVPPEN; __raw_writel(val, REALVIEW_FLASHCTRL); } static void realview_flash_set_vpp(int on) { u32 val; val = __raw_readl(REALVIEW_FLASHCTRL); if (on) val |= REALVIEW_FLASHPROG_FLVPPEN; else val &= ~REALVIEW_FLASHPROG_FLVPPEN; __raw_writel(val, REALVIEW_FLASHCTRL); } static struct flash_platform_data realview_flash_data = { .map_name = "cfi_probe", .width = 4, .init = realview_flash_init, .exit = realview_flash_exit, .set_vpp = realview_flash_set_vpp, }; struct platform_device realview_flash_device = { .name = "armflash", .id = 0, .dev = { .platform_data = &realview_flash_data, }, }; int realview_flash_register(struct resource *res, u32 num) { realview_flash_device.resource = res; realview_flash_device.num_resources = num; return platform_device_register(&realview_flash_device); } static struct resource realview_i2c_resource = { .start = REALVIEW_I2C_BASE, .end = REALVIEW_I2C_BASE + SZ_4K - 1, .flags = IORESOURCE_MEM, }; struct platform_device realview_i2c_device = { .name = "versatile-i2c", .id = -1, .num_resources = 1, .resource = &realview_i2c_resource, }; #define REALVIEW_SYSMCI (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_MCI_OFFSET) static unsigned int realview_mmc_status(struct device *dev) { struct amba_device *adev = container_of(dev, struct amba_device, dev); u32 mask; if (adev->res.start == REALVIEW_MMCI0_BASE) mask = 1; else mask = 2; return readl(REALVIEW_SYSMCI) & mask; } struct mmc_platform_data realview_mmc0_plat_data = { .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34, .status = realview_mmc_status, }; struct mmc_platform_data realview_mmc1_plat_data = { .ocr_mask = MMC_VDD_32_33|MMC_VDD_33_34, .status = realview_mmc_status, }; /* * Clock handling */ static const struct icst307_params realview_oscvco_params = { .ref = 24000, .vco_max = 200000, .vd_min = 4 + 8, .vd_max = 511 + 8, .rd_min = 1 + 2, .rd_max = 127 + 2, }; static void realview_oscvco_set(struct clk *clk, struct icst307_vco vco) { void __iomem *sys_lock = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LOCK_OFFSET; void __iomem *sys_osc = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_OSC4_OFFSET; u32 val; val = readl(sys_osc) & ~0x7ffff; val |= vco.v | (vco.r << 9) | (vco.s << 16); writel(0xa05f, sys_lock); writel(val, sys_osc); writel(0, sys_lock); } struct clk realview_clcd_clk = { .name = "CLCDCLK", .params = &realview_oscvco_params, .setvco = realview_oscvco_set, }; /* * CLCD support. */ #define SYS_CLCD_NLCDIOON (1 << 2) #define SYS_CLCD_VDDPOSSWITCH (1 << 3) #define SYS_CLCD_PWR3V5SWITCH (1 << 4) #define SYS_CLCD_ID_MASK (0x1f << 8) #define SYS_CLCD_ID_SANYO_3_8 (0x00 << 8) #define SYS_CLCD_ID_UNKNOWN_8_4 (0x01 << 8) #define SYS_CLCD_ID_EPSON_2_2 (0x02 << 8) #define SYS_CLCD_ID_SANYO_2_5 (0x07 << 8) #define SYS_CLCD_ID_VGA (0x1f << 8) static struct clcd_panel vga = { .mode = { .name = "VGA", .refresh = 60, .xres = 640, .yres = 480, .pixclock = 39721, .left_margin = 40, .right_margin = 24, .upper_margin = 32, .lower_margin = 11, .hsync_len = 96, .vsync_len = 2, .sync = 0, .vmode = FB_VMODE_NONINTERLACED, }, .width = -1, .height = -1, .tim2 = TIM2_BCD | TIM2_IPC, .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1), .bpp = 16, }; static struct clcd_panel sanyo_3_8_in = { .mode = { .name = "Sanyo QVGA", .refresh = 116, .xres = 320, .yres = 240, .pixclock = 100000, .left_margin = 6, .right_margin = 6, .upper_margin = 5, .lower_margin = 5, .hsync_len = 6, .vsync_len = 6, .sync = 0, .vmode = FB_VMODE_NONINTERLACED, }, .width = -1, .height = -1, .tim2 = TIM2_BCD, .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1), .bpp = 16, }; static struct clcd_panel sanyo_2_5_in = { .mode = { .name = "Sanyo QVGA Portrait", .refresh = 116, .xres = 240, .yres = 320, .pixclock = 100000, .left_margin = 20, .right_margin = 10, .upper_margin = 2, .lower_margin = 2, .hsync_len = 10, .vsync_len = 2, .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, .vmode = FB_VMODE_NONINTERLACED, }, .width = -1, .height = -1, .tim2 = TIM2_IVS | TIM2_IHS | TIM2_IPC, .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1), .bpp = 16, }; static struct clcd_panel epson_2_2_in = { .mode = { .name = "Epson QCIF", .refresh = 390, .xres = 176, .yres = 220, .pixclock = 62500, .left_margin = 3, .right_margin = 2, .upper_margin = 1, .lower_margin = 0, .hsync_len = 3, .vsync_len = 2, .sync = 0, .vmode = FB_VMODE_NONINTERLACED, }, .width = -1, .height = -1, .tim2 = TIM2_BCD | TIM2_IPC, .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1), .bpp = 16, }; /* * Detect which LCD panel is connected, and return the appropriate * clcd_panel structure. Note: we do not have any information on * the required timings for the 8.4in panel, so we presently assume * VGA timings. */ static struct clcd_panel *realview_clcd_panel(void) { void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET; struct clcd_panel *panel = &vga; u32 val; val = readl(sys_clcd) & SYS_CLCD_ID_MASK; if (val == SYS_CLCD_ID_SANYO_3_8) panel = &sanyo_3_8_in; else if (val == SYS_CLCD_ID_SANYO_2_5) panel = &sanyo_2_5_in; else if (val == SYS_CLCD_ID_EPSON_2_2) panel = &epson_2_2_in; else if (val == SYS_CLCD_ID_VGA) panel = &vga; else { printk(KERN_ERR "CLCD: unknown LCD panel ID 0x%08x, using VGA\n", val); panel = &vga; } return panel; } /* * Disable all display connectors on the interface module. */ static void realview_clcd_disable(struct clcd_fb *fb) { void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET; u32 val; val = readl(sys_clcd); val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH; writel(val, sys_clcd); } /* * Enable the relevant connector on the interface module. */ static void realview_clcd_enable(struct clcd_fb *fb) { void __iomem *sys_clcd = __io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_CLCD_OFFSET; u32 val; /* * Enable the PSUs */ val = readl(sys_clcd); val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH; writel(val, sys_clcd); } static unsigned long framesize = SZ_1M; static int realview_clcd_setup(struct clcd_fb *fb) { dma_addr_t dma; fb->panel = realview_clcd_panel(); fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, framesize, &dma, GFP_KERNEL); if (!fb->fb.screen_base) { printk(KERN_ERR "CLCD: unable to map framebuffer\n"); return -ENOMEM; } fb->fb.fix.smem_start = dma; fb->fb.fix.smem_len = framesize; return 0; } static int realview_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma) { return dma_mmap_writecombine(&fb->dev->dev, vma, fb->fb.screen_base, fb->fb.fix.smem_start, fb->fb.fix.smem_len); } static void realview_clcd_remove(struct clcd_fb *fb) { dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len, fb->fb.screen_base, fb->fb.fix.smem_start); } struct clcd_board clcd_plat_data = { .name = "RealView", .check = clcdfb_check, .decode = clcdfb_decode, .disable = realview_clcd_disable, .enable = realview_clcd_enable, .setup = realview_clcd_setup, .mmap = realview_clcd_mmap, .remove = realview_clcd_remove, }; #ifdef CONFIG_LEDS #define VA_LEDS_BASE (__io_address(REALVIEW_SYS_BASE) + REALVIEW_SYS_LED_OFFSET) void realview_leds_event(led_event_t ledevt) { unsigned long flags; u32 val; local_irq_save(flags); val = readl(VA_LEDS_BASE); switch (ledevt) { case led_idle_start: val = val & ~REALVIEW_SYS_LED0; break; case led_idle_end: val = val | REALVIEW_SYS_LED0; break; case led_timer: val = val ^ REALVIEW_SYS_LED1; break; case led_halted: val = 0; break; default: break; } writel(val, VA_LEDS_BASE); local_irq_restore(flags); } #endif /* CONFIG_LEDS */ /* * Where is the timer (VA)? */ void __iomem *timer0_va_base; void __iomem *timer1_va_base; void __iomem *timer2_va_base; void __iomem *timer3_va_base; /* * How long is the timer interval? */ #define TIMER_INTERVAL (TICKS_PER_uSEC * mSEC_10) #if TIMER_INTERVAL >= 0x100000 #define TIMER_RELOAD (TIMER_INTERVAL >> 8) #define TIMER_DIVISOR (TIMER_CTRL_DIV256) #define TICKS2USECS(x) (256 * (x) / TICKS_PER_uSEC) #elif TIMER_INTERVAL >= 0x10000 #define TIMER_RELOAD (TIMER_INTERVAL >> 4) /* Divide by 16 */ #define TIMER_DIVISOR (TIMER_CTRL_DIV16) #define TICKS2USECS(x) (16 * (x) / TICKS_PER_uSEC) #else #define TIMER_RELOAD (TIMER_INTERVAL) #define TIMER_DIVISOR (TIMER_CTRL_DIV1) #define TICKS2USECS(x) ((x) / TICKS_PER_uSEC) #endif static void timer_set_mode(enum clock_event_mode mode, struct clock_event_device *clk) { unsigned long ctrl; switch(mode) { case CLOCK_EVT_MODE_PERIODIC: writel(TIMER_RELOAD, timer0_va_base + TIMER_LOAD); 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; } writel(ctrl, timer0_va_base + TIMER_CTRL); } 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, .rating = 300, .cpumask = CPU_MASK_ALL, }; static void __init realview_clockevents_init(unsigned int timer_irq) { timer0_clockevent.irq = timer_irq; 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); clockevents_register_device(&timer0_clockevent); } /* * IRQ handler for the timer */ static irqreturn_t realview_timer_interrupt(int irq, void *dev_id) { struct clock_event_device *evt = &timer0_clockevent; /* clear the interrupt */ writel(1, timer0_va_base + TIMER_INTCLR); evt->event_handler(evt); return IRQ_HANDLED; } static struct irqaction realview_timer_irq = { .name = "RealView Timer Tick", .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, .handler = realview_timer_interrupt, }; static cycle_t realview_get_cycles(void) { return ~readl(timer3_va_base + TIMER_VALUE); } static struct clocksource clocksource_realview = { .name = "timer3", .rating = 200, .read = realview_get_cycles, .mask = CLOCKSOURCE_MASK(32), .shift = 20, .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; static void __init realview_clocksource_init(void) { /* setup timer 0 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_realview.mult = clocksource_khz2mult(1000, clocksource_realview.shift); clocksource_register(&clocksource_realview); } /* * Set up the clock source and clock events devices */ void __init realview_timer_init(unsigned int timer_irq) { u32 val; #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST /* * The dummy clock device has to be registered before the main device * so that the latter will broadcast the clock events */ local_timer_setup(smp_processor_id()); #endif /* * set clock frequency: * REALVIEW_REFCLK is 32KHz * REALVIEW_TIMCLK is 1MHz */ val = readl(__io_address(REALVIEW_SCTL_BASE)); writel((REALVIEW_TIMCLK << REALVIEW_TIMER1_EnSel) | (REALVIEW_TIMCLK << REALVIEW_TIMER2_EnSel) | (REALVIEW_TIMCLK << REALVIEW_TIMER3_EnSel) | (REALVIEW_TIMCLK << REALVIEW_TIMER4_EnSel) | val, __io_address(REALVIEW_SCTL_BASE)); /* * Initialise to a known state (all timers off) */ writel(0, timer0_va_base + TIMER_CTRL); writel(0, timer1_va_base + TIMER_CTRL); writel(0, timer2_va_base + TIMER_CTRL); writel(0, timer3_va_base + TIMER_CTRL); /* * Make irqs happen for the system timer */ setup_irq(timer_irq, &realview_timer_irq); realview_clocksource_init(); realview_clockevents_init(timer_irq); }