| /* |
| * 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/gpio.h> |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/pm.h> |
| #include <linux/cpufreq.h> |
| #include <linux/ioport.h> |
| #include <linux/platform_device.h> |
| #include <linux/reboot.h> |
| |
| #include <video/sa1100fb.h> |
| |
| #include <asm/div64.h> |
| #include <asm/mach/map.h> |
| #include <asm/mach/flash.h> |
| #include <asm/irq.h> |
| #include <asm/system_misc.h> |
| |
| #include <mach/hardware.h> |
| #include <mach/irqs.h> |
| |
| #include "generic.h" |
| |
| unsigned int reset_status; |
| EXPORT_SYMBOL(reset_status); |
| |
| #define NR_FREQS 16 |
| |
| /* |
| * This table is setup for a 3.6864MHz Crystal. |
| */ |
| struct cpufreq_frequency_table sa11x0_freq_table[NR_FREQS+1] = { |
| { .frequency = 59000, /* 59.0 MHz */}, |
| { .frequency = 73700, /* 73.7 MHz */}, |
| { .frequency = 88500, /* 88.5 MHz */}, |
| { .frequency = 103200, /* 103.2 MHz */}, |
| { .frequency = 118000, /* 118.0 MHz */}, |
| { .frequency = 132700, /* 132.7 MHz */}, |
| { .frequency = 147500, /* 147.5 MHz */}, |
| { .frequency = 162200, /* 162.2 MHz */}, |
| { .frequency = 176900, /* 176.9 MHz */}, |
| { .frequency = 191700, /* 191.7 MHz */}, |
| { .frequency = 206400, /* 206.4 MHz */}, |
| { .frequency = 221200, /* 221.2 MHz */}, |
| { .frequency = 235900, /* 235.9 MHz */}, |
| { .frequency = 250700, /* 250.7 MHz */}, |
| { .frequency = 265400, /* 265.4 MHz */}, |
| { .frequency = 280200, /* 280.2 MHz */}, |
| { .frequency = CPUFREQ_TABLE_END, }, |
| }; |
| |
| /* rounds up(!) */ |
| unsigned int sa11x0_freq_to_ppcr(unsigned int khz) |
| { |
| int i; |
| |
| for (i = 0; i < NR_FREQS; i++) |
| if (sa11x0_freq_table[i].frequency >= khz) |
| break; |
| |
| return i; |
| } |
| |
| unsigned int sa11x0_ppcr_to_freq(unsigned int idx) |
| { |
| unsigned int freq = 0; |
| if (idx < NR_FREQS) |
| freq = sa11x0_freq_table[idx].frequency; |
| 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 = sa11x0_freq_table[sa11x0_freq_to_ppcr(policy->min)].frequency; |
| 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 sa11x0_freq_table[PPCR & 0xf].frequency; |
| } |
| |
| /* |
| * 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; |
| } |
| |
| void sa11x0_restart(enum reboot_mode mode, const char *cmd) |
| { |
| if (mode == REBOOT_SOFT) { |
| /* Jump into ROM at address 0 */ |
| soft_restart(0); |
| } else { |
| /* Use on-chip reset capability */ |
| RSRR = RSRR_SWR; |
| } |
| } |
| |
| static void sa11x0_register_device(struct platform_device *dev, void *data) |
| { |
| int err; |
| dev->dev.platform_data = data; |
| err = platform_device_register(dev); |
| if (err) |
| printk(KERN_ERR "Unable to register device %s: %d\n", |
| dev->name, err); |
| } |
| |
| |
| static struct resource sa11x0udc_resources[] = { |
| [0] = DEFINE_RES_MEM(__PREG(Ser0UDCCR), SZ_64K), |
| [1] = DEFINE_RES_IRQ(IRQ_Ser0UDC), |
| }; |
| |
| 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] = DEFINE_RES_MEM(__PREG(Ser1UTCR0), SZ_64K), |
| [1] = DEFINE_RES_IRQ(IRQ_Ser1UART), |
| }; |
| |
| 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] = DEFINE_RES_MEM(__PREG(Ser3UTCR0), SZ_64K), |
| [1] = DEFINE_RES_IRQ(IRQ_Ser3UART), |
| }; |
| |
| 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] = DEFINE_RES_MEM(__PREG(Ser4MCCR0), SZ_64K), |
| [1] = DEFINE_RES_MEM(__PREG(Ser4MCCR1), 4), |
| [2] = DEFINE_RES_IRQ(IRQ_Ser4MCP), |
| }; |
| |
| 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 __init sa11x0_ppc_configure_mcp(void) |
| { |
| /* Setup the PPC unit for the MCP */ |
| PPDR &= ~PPC_RXD4; |
| PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM; |
| PSDR |= PPC_RXD4; |
| PSDR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM); |
| PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM); |
| } |
| |
| void sa11x0_register_mcp(struct mcp_plat_data *data) |
| { |
| sa11x0_register_device(&sa11x0mcp_device, data); |
| } |
| |
| static struct resource sa11x0ssp_resources[] = { |
| [0] = DEFINE_RES_MEM(0x80070000, SZ_64K), |
| [1] = DEFINE_RES_IRQ(IRQ_Ser4SSP), |
| }; |
| |
| 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] = DEFINE_RES_MEM(0xb0100000, SZ_64K), |
| [1] = DEFINE_RES_IRQ(IRQ_LCD), |
| }; |
| |
| 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, |
| }; |
| |
| void sa11x0_register_lcd(struct sa1100fb_mach_info *inf) |
| { |
| sa11x0_register_device(&sa11x0fb_device, inf); |
| } |
| |
| static struct platform_device sa11x0pcmcia_device = { |
| .name = "sa11x0-pcmcia", |
| .id = -1, |
| }; |
| |
| static struct platform_device sa11x0mtd_device = { |
| .name = "sa1100-mtd", |
| .id = -1, |
| }; |
| |
| void sa11x0_register_mtd(struct flash_platform_data *flash, |
| struct resource *res, int nr) |
| { |
| flash->name = "sa1100"; |
| sa11x0mtd_device.resource = res; |
| sa11x0mtd_device.num_resources = nr; |
| sa11x0_register_device(&sa11x0mtd_device, flash); |
| } |
| |
| static struct resource sa11x0ir_resources[] = { |
| DEFINE_RES_MEM(__PREG(Ser2UTCR0), 0x24), |
| DEFINE_RES_MEM(__PREG(Ser2HSCR0), 0x1c), |
| DEFINE_RES_MEM(__PREG(Ser2HSCR2), 0x04), |
| DEFINE_RES_IRQ(IRQ_Ser2ICP), |
| }; |
| |
| static struct platform_device sa11x0ir_device = { |
| .name = "sa11x0-ir", |
| .id = -1, |
| .num_resources = ARRAY_SIZE(sa11x0ir_resources), |
| .resource = sa11x0ir_resources, |
| }; |
| |
| void sa11x0_register_irda(struct irda_platform_data *irda) |
| { |
| sa11x0_register_device(&sa11x0ir_device, irda); |
| } |
| |
| static struct resource sa1100_rtc_resources[] = { |
| DEFINE_RES_MEM(0x90010000, 0x40), |
| DEFINE_RES_IRQ_NAMED(IRQ_RTC1Hz, "rtc 1Hz"), |
| DEFINE_RES_IRQ_NAMED(IRQ_RTCAlrm, "rtc alarm"), |
| }; |
| |
| static struct platform_device sa11x0rtc_device = { |
| .name = "sa1100-rtc", |
| .id = -1, |
| .num_resources = ARRAY_SIZE(sa1100_rtc_resources), |
| .resource = sa1100_rtc_resources, |
| }; |
| |
| static struct resource sa11x0dma_resources[] = { |
| DEFINE_RES_MEM(DMA_PHYS, DMA_SIZE), |
| DEFINE_RES_IRQ(IRQ_DMA0), |
| DEFINE_RES_IRQ(IRQ_DMA1), |
| DEFINE_RES_IRQ(IRQ_DMA2), |
| DEFINE_RES_IRQ(IRQ_DMA3), |
| DEFINE_RES_IRQ(IRQ_DMA4), |
| DEFINE_RES_IRQ(IRQ_DMA5), |
| }; |
| |
| static u64 sa11x0dma_dma_mask = DMA_BIT_MASK(32); |
| |
| static struct platform_device sa11x0dma_device = { |
| .name = "sa11x0-dma", |
| .id = -1, |
| .dev = { |
| .dma_mask = &sa11x0dma_dma_mask, |
| .coherent_dma_mask = 0xffffffff, |
| }, |
| .num_resources = ARRAY_SIZE(sa11x0dma_resources), |
| .resource = sa11x0dma_resources, |
| }; |
| |
| static struct platform_device *sa11x0_devices[] __initdata = { |
| &sa11x0udc_device, |
| &sa11x0uart1_device, |
| &sa11x0uart3_device, |
| &sa11x0ssp_device, |
| &sa11x0pcmcia_device, |
| &sa11x0rtc_device, |
| &sa11x0dma_device, |
| }; |
| |
| static int __init sa1100_init(void) |
| { |
| pm_power_off = sa1100_power_off; |
| return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices)); |
| } |
| |
| arch_initcall(sa1100_init); |
| |
| void __init sa11x0_init_late(void) |
| { |
| sa11x0_pm_init(); |
| } |
| |
| /* |
| * 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 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 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); |
| } |
| |