/* * linux/arch/arm/mach-sa1100/generic.c * * Author: Nicolas Pitre * * Code common to all SA11x0 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. */ #include <linux/config.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/pm.h> #include <linux/cpufreq.h> #include <linux/ioport.h> #include <asm/div64.h> #include <asm/hardware.h> #include <asm/system.h> #include <asm/pgtable.h> #include <asm/mach/map.h> #include <asm/irq.h> #include "generic.h" #define NR_FREQS 16 /* * This table is setup for a 3.6864MHz Crystal. */ static const unsigned short cclk_frequency_100khz[NR_FREQS] = { 590, /* 59.0 MHz */ 737, /* 73.7 MHz */ 885, /* 88.5 MHz */ 1032, /* 103.2 MHz */ 1180, /* 118.0 MHz */ 1327, /* 132.7 MHz */ 1475, /* 147.5 MHz */ 1622, /* 162.2 MHz */ 1769, /* 176.9 MHz */ 1917, /* 191.7 MHz */ 2064, /* 206.4 MHz */ 2212, /* 221.2 MHz */ 2359, /* 235.9 MHz */ 2507, /* 250.7 MHz */ 2654, /* 265.4 MHz */ 2802 /* 280.2 MHz */ }; #if defined(CONFIG_CPU_FREQ_SA1100) || defined(CONFIG_CPU_FREQ_SA1110) /* rounds up(!) */ unsigned int sa11x0_freq_to_ppcr(unsigned int khz) { int i; khz /= 100; for (i = 0; i < NR_FREQS; i++) if (cclk_frequency_100khz[i] >= khz) break; return i; } unsigned int sa11x0_ppcr_to_freq(unsigned int idx) { unsigned int freq = 0; if (idx < NR_FREQS) freq = cclk_frequency_100khz[idx] * 100; return freq; } /* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on * this platform, anyway. */ int sa11x0_verify_speed(struct cpufreq_policy *policy) { unsigned int tmp; if (policy->cpu) return -EINVAL; cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq); /* make sure that at least one frequency is within the policy */ tmp = cclk_frequency_100khz[sa11x0_freq_to_ppcr(policy->min)] * 100; if (tmp > policy->max) policy->max = tmp; cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq); return 0; } unsigned int sa11x0_getspeed(unsigned int cpu) { if (cpu) return 0; return cclk_frequency_100khz[PPCR & 0xf] * 100; } #else /* * We still need to provide this so building without cpufreq works. */ unsigned int cpufreq_get(unsigned int cpu) { return cclk_frequency_100khz[PPCR & 0xf] * 100; } EXPORT_SYMBOL(cpufreq_get); #endif /* * This is the SA11x0 sched_clock implementation. This has * a resolution of 271ns, and a maximum value of 1165s. * ( * 1E9 / 3686400 => * 78125 / 288) */ unsigned long long sched_clock(void) { unsigned long long v; v = (unsigned long long)OSCR * 78125; do_div(v, 288); return v; } /* * Default power-off for SA1100 */ static void sa1100_power_off(void) { mdelay(100); local_irq_disable(); /* disable internal oscillator, float CS lines */ PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS); /* enable wake-up on GPIO0 (Assabet...) */ PWER = GFER = GRER = 1; /* * set scratchpad to zero, just in case it is used as a * restart address by the bootloader. */ PSPR = 0; /* enter sleep mode */ PMCR = PMCR_SF; } static struct resource sa11x0udc_resources[] = { [0] = { .start = 0x80000000, .end = 0x8000ffff, .flags = IORESOURCE_MEM, }, }; static u64 sa11x0udc_dma_mask = 0xffffffffUL; static struct platform_device sa11x0udc_device = { .name = "sa11x0-udc", .id = -1, .dev = { .dma_mask = &sa11x0udc_dma_mask, .coherent_dma_mask = 0xffffffff, }, .num_resources = ARRAY_SIZE(sa11x0udc_resources), .resource = sa11x0udc_resources, }; static struct resource sa11x0uart1_resources[] = { [0] = { .start = 0x80010000, .end = 0x8001ffff, .flags = IORESOURCE_MEM, }, }; static struct platform_device sa11x0uart1_device = { .name = "sa11x0-uart", .id = 1, .num_resources = ARRAY_SIZE(sa11x0uart1_resources), .resource = sa11x0uart1_resources, }; static struct resource sa11x0uart3_resources[] = { [0] = { .start = 0x80050000, .end = 0x8005ffff, .flags = IORESOURCE_MEM, }, }; static struct platform_device sa11x0uart3_device = { .name = "sa11x0-uart", .id = 3, .num_resources = ARRAY_SIZE(sa11x0uart3_resources), .resource = sa11x0uart3_resources, }; static struct resource sa11x0mcp_resources[] = { [0] = { .start = 0x80060000, .end = 0x8006ffff, .flags = IORESOURCE_MEM, }, }; static u64 sa11x0mcp_dma_mask = 0xffffffffUL; static struct platform_device sa11x0mcp_device = { .name = "sa11x0-mcp", .id = -1, .dev = { .dma_mask = &sa11x0mcp_dma_mask, .coherent_dma_mask = 0xffffffff, }, .num_resources = ARRAY_SIZE(sa11x0mcp_resources), .resource = sa11x0mcp_resources, }; void sa11x0_set_mcp_data(struct mcp_plat_data *data) { sa11x0mcp_device.dev.platform_data = data; } static struct resource sa11x0ssp_resources[] = { [0] = { .start = 0x80070000, .end = 0x8007ffff, .flags = IORESOURCE_MEM, }, }; static u64 sa11x0ssp_dma_mask = 0xffffffffUL; static struct platform_device sa11x0ssp_device = { .name = "sa11x0-ssp", .id = -1, .dev = { .dma_mask = &sa11x0ssp_dma_mask, .coherent_dma_mask = 0xffffffff, }, .num_resources = ARRAY_SIZE(sa11x0ssp_resources), .resource = sa11x0ssp_resources, }; static struct resource sa11x0fb_resources[] = { [0] = { .start = 0xb0100000, .end = 0xb010ffff, .flags = IORESOURCE_MEM, }, [1] = { .start = IRQ_LCD, .end = IRQ_LCD, .flags = IORESOURCE_IRQ, }, }; static struct platform_device sa11x0fb_device = { .name = "sa11x0-fb", .id = -1, .dev = { .coherent_dma_mask = 0xffffffff, }, .num_resources = ARRAY_SIZE(sa11x0fb_resources), .resource = sa11x0fb_resources, }; static struct platform_device sa11x0pcmcia_device = { .name = "sa11x0-pcmcia", .id = -1, }; static struct platform_device sa11x0mtd_device = { .name = "flash", .id = -1, }; void sa11x0_set_flash_data(struct flash_platform_data *flash, struct resource *res, int nr) { sa11x0mtd_device.dev.platform_data = flash; sa11x0mtd_device.resource = res; sa11x0mtd_device.num_resources = nr; } static struct resource sa11x0ir_resources[] = { { .start = __PREG(Ser2UTCR0), .end = __PREG(Ser2UTCR0) + 0x24 - 1, .flags = IORESOURCE_MEM, }, { .start = __PREG(Ser2HSCR0), .end = __PREG(Ser2HSCR0) + 0x1c - 1, .flags = IORESOURCE_MEM, }, { .start = __PREG(Ser2HSCR2), .end = __PREG(Ser2HSCR2) + 0x04 - 1, .flags = IORESOURCE_MEM, }, { .start = IRQ_Ser2ICP, .end = IRQ_Ser2ICP, .flags = IORESOURCE_IRQ, } }; static struct platform_device sa11x0ir_device = { .name = "sa11x0-ir", .id = -1, .num_resources = ARRAY_SIZE(sa11x0ir_resources), .resource = sa11x0ir_resources, }; void sa11x0_set_irda_data(struct irda_platform_data *irda) { sa11x0ir_device.dev.platform_data = irda; } static struct platform_device *sa11x0_devices[] __initdata = { &sa11x0udc_device, &sa11x0uart1_device, &sa11x0uart3_device, &sa11x0mcp_device, &sa11x0ssp_device, &sa11x0pcmcia_device, &sa11x0fb_device, &sa11x0mtd_device, }; static int __init sa1100_init(void) { pm_power_off = sa1100_power_off; if (sa11x0ir_device.dev.platform_data) platform_device_register(&sa11x0ir_device); return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices)); } arch_initcall(sa1100_init); void (*sa1100fb_backlight_power)(int on); void (*sa1100fb_lcd_power)(int on); EXPORT_SYMBOL(sa1100fb_backlight_power); EXPORT_SYMBOL(sa1100fb_lcd_power); /* * Common I/O mapping: * * Typically, static virtual address mappings are as follow: * * 0xf0000000-0xf3ffffff: miscellaneous stuff (CPLDs, etc.) * 0xf4000000-0xf4ffffff: SA-1111 * 0xf5000000-0xf5ffffff: reserved (used by cache flushing area) * 0xf6000000-0xfffeffff: reserved (internal SA1100 IO defined above) * 0xffff0000-0xffff0fff: SA1100 exception vectors * 0xffff2000-0xffff2fff: Minicache copy_user_page area * * Below 0xe8000000 is reserved for vm allocation. * * The machine specific code must provide the extra mapping beside the * default mapping provided here. */ static struct map_desc standard_io_desc[] __initdata = { { /* PCM */ .virtual = 0xf8000000, .pfn = __phys_to_pfn(0x80000000), .length = 0x00100000, .type = MT_DEVICE }, { /* SCM */ .virtual = 0xfa000000, .pfn = __phys_to_pfn(0x90000000), .length = 0x00100000, .type = MT_DEVICE }, { /* MER */ .virtual = 0xfc000000, .pfn = __phys_to_pfn(0xa0000000), .length = 0x00100000, .type = MT_DEVICE }, { /* LCD + DMA */ .virtual = 0xfe000000, .pfn = __phys_to_pfn(0xb0000000), .length = 0x00200000, .type = MT_DEVICE }, }; void __init sa1100_map_io(void) { iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc)); } /* * Disable the memory bus request/grant signals on the SA1110 to * ensure that we don't receive spurious memory requests. We set * the MBGNT signal false to ensure the SA1111 doesn't own the * SDRAM bus. */ void __init sa1110_mb_disable(void) { unsigned long flags; local_irq_save(flags); PGSR &= ~GPIO_MBGNT; GPCR = GPIO_MBGNT; GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT; GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ); local_irq_restore(flags); } /* * If the system is going to use the SA-1111 DMA engines, set up * the memory bus request/grant pins. */ void __init sa1110_mb_enable(void) { unsigned long flags; local_irq_save(flags); PGSR &= ~GPIO_MBGNT; GPCR = GPIO_MBGNT; GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT; GAFR |= (GPIO_MBGNT | GPIO_MBREQ); TUCR |= TUCR_MR; local_irq_restore(flags); }