| /* |
| * linux/arch/arm/mach-pxa/generic.c |
| * |
| * Author: Nicolas Pitre |
| * Created: Jun 15, 2001 |
| * Copyright: MontaVista Software Inc. |
| * |
| * Code common to all PXA machines. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * Since this file should be linked before any other machine specific file, |
| * the __initcall() here will be executed first. This serves as default |
| * initialization stuff for PXA machines which can be overridden later if |
| * need be. |
| */ |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/platform_device.h> |
| #include <linux/ioport.h> |
| #include <linux/pm.h> |
| #include <linux/string.h> |
| |
| #include <linux/sched.h> |
| #include <asm/cnt32_to_63.h> |
| #include <asm/div64.h> |
| |
| #include <asm/hardware.h> |
| #include <asm/irq.h> |
| #include <asm/system.h> |
| #include <asm/pgtable.h> |
| #include <asm/mach/map.h> |
| |
| #include <asm/arch/pxa-regs.h> |
| #include <asm/arch/gpio.h> |
| #include <asm/arch/udc.h> |
| #include <asm/arch/pxafb.h> |
| #include <asm/arch/mmc.h> |
| #include <asm/arch/irda.h> |
| #include <asm/arch/i2c.h> |
| |
| #include "generic.h" |
| |
| /* |
| * This is the PXA2xx sched_clock implementation. This has a resolution |
| * of at least 308ns and a maximum value that depends on the value of |
| * CLOCK_TICK_RATE. |
| * |
| * The return value is guaranteed to be monotonic in that range as |
| * long as there is always less than 582 seconds between successive |
| * calls to this function. |
| */ |
| unsigned long long sched_clock(void) |
| { |
| unsigned long long v = cnt32_to_63(OSCR); |
| /* Note: top bit ov v needs cleared unless multiplier is even. */ |
| |
| #if CLOCK_TICK_RATE == 3686400 |
| /* 1E9 / 3686400 => 78125 / 288, max value = 32025597s (370 days). */ |
| /* The <<1 is used to get rid of tick.hi top bit */ |
| v *= 78125<<1; |
| do_div(v, 288<<1); |
| #elif CLOCK_TICK_RATE == 3250000 |
| /* 1E9 / 3250000 => 4000 / 13, max value = 709490156s (8211 days) */ |
| v *= 4000; |
| do_div(v, 13); |
| #elif CLOCK_TICK_RATE == 3249600 |
| /* 1E9 / 3249600 => 625000 / 2031, max value = 4541295s (52 days) */ |
| v *= 625000; |
| do_div(v, 2031); |
| #else |
| #warning "consider fixing sched_clock for your value of CLOCK_TICK_RATE" |
| /* |
| * 96-bit math to perform tick * NSEC_PER_SEC / CLOCK_TICK_RATE for |
| * any value of CLOCK_TICK_RATE. Max value is in the 80 thousand |
| * years range and truncation to unsigned long long limits it to |
| * sched_clock's max range of ~584 years. This is nice but with |
| * higher computation cost. |
| */ |
| { |
| union { |
| unsigned long long val; |
| struct { unsigned long lo, hi; }; |
| } x; |
| unsigned long long y; |
| |
| x.val = v; |
| x.hi &= 0x7fffffff; |
| y = (unsigned long long)x.lo * NSEC_PER_SEC; |
| x.lo = y; |
| y = (y >> 32) + (unsigned long long)x.hi * NSEC_PER_SEC; |
| x.hi = do_div(y, CLOCK_TICK_RATE); |
| do_div(x.val, CLOCK_TICK_RATE); |
| x.hi += y; |
| v = x.val; |
| } |
| #endif |
| |
| return v; |
| } |
| |
| /* |
| * Handy function to set GPIO alternate functions |
| */ |
| |
| int pxa_gpio_mode(int gpio_mode) |
| { |
| unsigned long flags; |
| int gpio = gpio_mode & GPIO_MD_MASK_NR; |
| int fn = (gpio_mode & GPIO_MD_MASK_FN) >> 8; |
| int gafr; |
| |
| if (gpio > PXA_LAST_GPIO) |
| return -EINVAL; |
| |
| local_irq_save(flags); |
| if (gpio_mode & GPIO_DFLT_LOW) |
| GPCR(gpio) = GPIO_bit(gpio); |
| else if (gpio_mode & GPIO_DFLT_HIGH) |
| GPSR(gpio) = GPIO_bit(gpio); |
| if (gpio_mode & GPIO_MD_MASK_DIR) |
| GPDR(gpio) |= GPIO_bit(gpio); |
| else |
| GPDR(gpio) &= ~GPIO_bit(gpio); |
| gafr = GAFR(gpio) & ~(0x3 << (((gpio) & 0xf)*2)); |
| GAFR(gpio) = gafr | (fn << (((gpio) & 0xf)*2)); |
| local_irq_restore(flags); |
| |
| return 0; |
| } |
| |
| EXPORT_SYMBOL(pxa_gpio_mode); |
| |
| /* |
| * Return GPIO level |
| */ |
| int pxa_gpio_get_value(unsigned gpio) |
| { |
| return __gpio_get_value(gpio); |
| } |
| |
| EXPORT_SYMBOL(pxa_gpio_get_value); |
| |
| /* |
| * Set output GPIO level |
| */ |
| void pxa_gpio_set_value(unsigned gpio, int value) |
| { |
| __gpio_set_value(gpio, value); |
| } |
| |
| EXPORT_SYMBOL(pxa_gpio_set_value); |
| |
| /* |
| * Routine to safely enable or disable a clock in the CKEN |
| */ |
| void pxa_set_cken(int clock, int enable) |
| { |
| unsigned long flags; |
| local_irq_save(flags); |
| |
| if (enable) |
| CKEN |= (1 << clock); |
| else |
| CKEN &= ~(1 << clock); |
| |
| local_irq_restore(flags); |
| } |
| |
| EXPORT_SYMBOL(pxa_set_cken); |
| |
| /* |
| * Intel PXA2xx internal register mapping. |
| * |
| * Note 1: not all PXA2xx variants implement all those addresses. |
| * |
| * Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table |
| * and cache flush area. |
| */ |
| static struct map_desc standard_io_desc[] __initdata = { |
| { /* Devs */ |
| .virtual = 0xf2000000, |
| .pfn = __phys_to_pfn(0x40000000), |
| .length = 0x02000000, |
| .type = MT_DEVICE |
| }, { /* LCD */ |
| .virtual = 0xf4000000, |
| .pfn = __phys_to_pfn(0x44000000), |
| .length = 0x00100000, |
| .type = MT_DEVICE |
| }, { /* Mem Ctl */ |
| .virtual = 0xf6000000, |
| .pfn = __phys_to_pfn(0x48000000), |
| .length = 0x00100000, |
| .type = MT_DEVICE |
| }, { /* USB host */ |
| .virtual = 0xf8000000, |
| .pfn = __phys_to_pfn(0x4c000000), |
| .length = 0x00100000, |
| .type = MT_DEVICE |
| }, { /* Camera */ |
| .virtual = 0xfa000000, |
| .pfn = __phys_to_pfn(0x50000000), |
| .length = 0x00100000, |
| .type = MT_DEVICE |
| }, { /* IMem ctl */ |
| .virtual = 0xfe000000, |
| .pfn = __phys_to_pfn(0x58000000), |
| .length = 0x00100000, |
| .type = MT_DEVICE |
| }, { /* UNCACHED_PHYS_0 */ |
| .virtual = 0xff000000, |
| .pfn = __phys_to_pfn(0x00000000), |
| .length = 0x00100000, |
| .type = MT_DEVICE |
| } |
| }; |
| |
| void __init pxa_map_io(void) |
| { |
| iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc)); |
| get_clk_frequency_khz(1); |
| } |
| |
| |
| static struct resource pxamci_resources[] = { |
| [0] = { |
| .start = 0x41100000, |
| .end = 0x41100fff, |
| .flags = IORESOURCE_MEM, |
| }, |
| [1] = { |
| .start = IRQ_MMC, |
| .end = IRQ_MMC, |
| .flags = IORESOURCE_IRQ, |
| }, |
| }; |
| |
| static u64 pxamci_dmamask = 0xffffffffUL; |
| |
| static struct platform_device pxamci_device = { |
| .name = "pxa2xx-mci", |
| .id = -1, |
| .dev = { |
| .dma_mask = &pxamci_dmamask, |
| .coherent_dma_mask = 0xffffffff, |
| }, |
| .num_resources = ARRAY_SIZE(pxamci_resources), |
| .resource = pxamci_resources, |
| }; |
| |
| void __init pxa_set_mci_info(struct pxamci_platform_data *info) |
| { |
| pxamci_device.dev.platform_data = info; |
| } |
| |
| |
| static struct pxa2xx_udc_mach_info pxa_udc_info; |
| |
| void __init pxa_set_udc_info(struct pxa2xx_udc_mach_info *info) |
| { |
| memcpy(&pxa_udc_info, info, sizeof *info); |
| } |
| |
| static struct resource pxa2xx_udc_resources[] = { |
| [0] = { |
| .start = 0x40600000, |
| .end = 0x4060ffff, |
| .flags = IORESOURCE_MEM, |
| }, |
| [1] = { |
| .start = IRQ_USB, |
| .end = IRQ_USB, |
| .flags = IORESOURCE_IRQ, |
| }, |
| }; |
| |
| static u64 udc_dma_mask = ~(u32)0; |
| |
| static struct platform_device udc_device = { |
| .name = "pxa2xx-udc", |
| .id = -1, |
| .resource = pxa2xx_udc_resources, |
| .num_resources = ARRAY_SIZE(pxa2xx_udc_resources), |
| .dev = { |
| .platform_data = &pxa_udc_info, |
| .dma_mask = &udc_dma_mask, |
| } |
| }; |
| |
| static struct resource pxafb_resources[] = { |
| [0] = { |
| .start = 0x44000000, |
| .end = 0x4400ffff, |
| .flags = IORESOURCE_MEM, |
| }, |
| [1] = { |
| .start = IRQ_LCD, |
| .end = IRQ_LCD, |
| .flags = IORESOURCE_IRQ, |
| }, |
| }; |
| |
| static u64 fb_dma_mask = ~(u64)0; |
| |
| static struct platform_device pxafb_device = { |
| .name = "pxa2xx-fb", |
| .id = -1, |
| .dev = { |
| .dma_mask = &fb_dma_mask, |
| .coherent_dma_mask = 0xffffffff, |
| }, |
| .num_resources = ARRAY_SIZE(pxafb_resources), |
| .resource = pxafb_resources, |
| }; |
| |
| void __init set_pxa_fb_info(struct pxafb_mach_info *info) |
| { |
| pxafb_device.dev.platform_data = info; |
| } |
| |
| void __init set_pxa_fb_parent(struct device *parent_dev) |
| { |
| pxafb_device.dev.parent = parent_dev; |
| } |
| |
| static struct platform_device ffuart_device = { |
| .name = "pxa2xx-uart", |
| .id = 0, |
| }; |
| static struct platform_device btuart_device = { |
| .name = "pxa2xx-uart", |
| .id = 1, |
| }; |
| static struct platform_device stuart_device = { |
| .name = "pxa2xx-uart", |
| .id = 2, |
| }; |
| static struct platform_device hwuart_device = { |
| .name = "pxa2xx-uart", |
| .id = 3, |
| }; |
| |
| static struct resource i2c_resources[] = { |
| { |
| .start = 0x40301680, |
| .end = 0x403016a3, |
| .flags = IORESOURCE_MEM, |
| }, { |
| .start = IRQ_I2C, |
| .end = IRQ_I2C, |
| .flags = IORESOURCE_IRQ, |
| }, |
| }; |
| |
| static struct platform_device i2c_device = { |
| .name = "pxa2xx-i2c", |
| .id = 0, |
| .resource = i2c_resources, |
| .num_resources = ARRAY_SIZE(i2c_resources), |
| }; |
| |
| #ifdef CONFIG_PXA27x |
| static struct resource i2c_power_resources[] = { |
| { |
| .start = 0x40f00180, |
| .end = 0x40f001a3, |
| .flags = IORESOURCE_MEM, |
| }, { |
| .start = IRQ_PWRI2C, |
| .end = IRQ_PWRI2C, |
| .flags = IORESOURCE_IRQ, |
| }, |
| }; |
| |
| static struct platform_device i2c_power_device = { |
| .name = "pxa2xx-i2c", |
| .id = 1, |
| .resource = i2c_power_resources, |
| .num_resources = ARRAY_SIZE(i2c_resources), |
| }; |
| #endif |
| |
| void __init pxa_set_i2c_info(struct i2c_pxa_platform_data *info) |
| { |
| i2c_device.dev.platform_data = info; |
| } |
| |
| static struct resource i2s_resources[] = { |
| { |
| .start = 0x40400000, |
| .end = 0x40400083, |
| .flags = IORESOURCE_MEM, |
| }, { |
| .start = IRQ_I2S, |
| .end = IRQ_I2S, |
| .flags = IORESOURCE_IRQ, |
| }, |
| }; |
| |
| static struct platform_device i2s_device = { |
| .name = "pxa2xx-i2s", |
| .id = -1, |
| .resource = i2s_resources, |
| .num_resources = ARRAY_SIZE(i2s_resources), |
| }; |
| |
| static u64 pxaficp_dmamask = ~(u32)0; |
| |
| static struct platform_device pxaficp_device = { |
| .name = "pxa2xx-ir", |
| .id = -1, |
| .dev = { |
| .dma_mask = &pxaficp_dmamask, |
| .coherent_dma_mask = 0xffffffff, |
| }, |
| }; |
| |
| void __init pxa_set_ficp_info(struct pxaficp_platform_data *info) |
| { |
| pxaficp_device.dev.platform_data = info; |
| } |
| |
| static struct platform_device pxartc_device = { |
| .name = "sa1100-rtc", |
| .id = -1, |
| }; |
| |
| static struct platform_device *devices[] __initdata = { |
| &pxamci_device, |
| &udc_device, |
| &pxafb_device, |
| &ffuart_device, |
| &btuart_device, |
| &stuart_device, |
| &pxaficp_device, |
| &i2c_device, |
| #ifdef CONFIG_PXA27x |
| &i2c_power_device, |
| #endif |
| &i2s_device, |
| &pxartc_device, |
| }; |
| |
| static int __init pxa_init(void) |
| { |
| int cpuid, ret; |
| |
| ret = platform_add_devices(devices, ARRAY_SIZE(devices)); |
| if (ret) |
| return ret; |
| |
| /* Only add HWUART for PXA255/26x; PXA210/250/27x do not have it. */ |
| cpuid = read_cpuid(CPUID_ID); |
| if (((cpuid >> 4) & 0xfff) == 0x2d0 || |
| ((cpuid >> 4) & 0xfff) == 0x290) |
| ret = platform_device_register(&hwuart_device); |
| |
| return ret; |
| } |
| |
| subsys_initcall(pxa_init); |