Bellido Nicolas | 038c5b6 | 2005-06-20 18:51:05 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-aaec2000/core.c |
| 3 | * |
| 4 | * Code common to all AAEC-2000 machines |
| 5 | * |
| 6 | * Copyright (c) 2005 Nicolas Bellido Y Ortega |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | #include <linux/config.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/init.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 16 | #include <linux/platform_device.h> |
Bellido Nicolas | 038c5b6 | 2005-06-20 18:51:05 +0100 | [diff] [blame] | 17 | #include <linux/list.h> |
| 18 | #include <linux/errno.h> |
Bellido Nicolas | 049eb32 | 2005-10-28 16:51:44 +0100 | [diff] [blame] | 19 | #include <linux/dma-mapping.h> |
Bellido Nicolas | 038c5b6 | 2005-06-20 18:51:05 +0100 | [diff] [blame] | 20 | #include <linux/interrupt.h> |
| 21 | #include <linux/timex.h> |
| 22 | #include <linux/signal.h> |
| 23 | |
| 24 | #include <asm/hardware.h> |
| 25 | #include <asm/irq.h> |
Bellido Nicolas | 049eb32 | 2005-10-28 16:51:44 +0100 | [diff] [blame] | 26 | #include <asm/sizes.h> |
Bellido Nicolas | 038c5b6 | 2005-06-20 18:51:05 +0100 | [diff] [blame] | 27 | |
Bellido Nicolas | 4a91ca2 | 2005-10-28 16:51:42 +0100 | [diff] [blame] | 28 | #include <asm/mach/flash.h> |
Bellido Nicolas | 038c5b6 | 2005-06-20 18:51:05 +0100 | [diff] [blame] | 29 | #include <asm/mach/irq.h> |
| 30 | #include <asm/mach/time.h> |
| 31 | #include <asm/mach/map.h> |
| 32 | |
Bellido Nicolas | 049eb32 | 2005-10-28 16:51:44 +0100 | [diff] [blame] | 33 | #include "core.h" |
| 34 | #include "clock.h" |
| 35 | |
Bellido Nicolas | 038c5b6 | 2005-06-20 18:51:05 +0100 | [diff] [blame] | 36 | /* |
| 37 | * Common I/O mapping: |
| 38 | * |
| 39 | * Static virtual address mappings are as follow: |
| 40 | * |
| 41 | * 0xf8000000-0xf8001ffff: Devices connected to APB bus |
| 42 | * 0xf8002000-0xf8003ffff: Devices connected to AHB bus |
| 43 | * |
| 44 | * Below 0xe8000000 is reserved for vm allocation. |
| 45 | * |
| 46 | * The machine specific code must provide the extra mapping beside the |
| 47 | * default mapping provided here. |
| 48 | */ |
| 49 | static struct map_desc standard_io_desc[] __initdata = { |
Deepak Saxena | f70cd65 | 2005-10-28 15:18:56 +0100 | [diff] [blame] | 50 | { |
| 51 | .virtual = VIO_APB_BASE, |
Bellido Nicolas | 16b6dd4 | 2006-05-07 22:49:21 +0100 | [diff] [blame] | 52 | .pfn = __phys_to_pfn(PIO_APB_BASE), |
Deepak Saxena | f70cd65 | 2005-10-28 15:18:56 +0100 | [diff] [blame] | 53 | .length = IO_APB_LENGTH, |
| 54 | .type = MT_DEVICE |
| 55 | }, { |
| 56 | .virtual = VIO_AHB_BASE, |
Bellido Nicolas | 16b6dd4 | 2006-05-07 22:49:21 +0100 | [diff] [blame] | 57 | .pfn = __phys_to_pfn(PIO_AHB_BASE), |
Deepak Saxena | f70cd65 | 2005-10-28 15:18:56 +0100 | [diff] [blame] | 58 | .length = IO_AHB_LENGTH, |
| 59 | .type = MT_DEVICE |
| 60 | } |
Bellido Nicolas | 038c5b6 | 2005-06-20 18:51:05 +0100 | [diff] [blame] | 61 | }; |
| 62 | |
| 63 | void __init aaec2000_map_io(void) |
| 64 | { |
| 65 | iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc)); |
| 66 | } |
| 67 | |
| 68 | /* |
| 69 | * Interrupt handling routines |
| 70 | */ |
| 71 | static void aaec2000_int_ack(unsigned int irq) |
| 72 | { |
| 73 | IRQ_INTSR = 1 << irq; |
| 74 | } |
| 75 | |
| 76 | static void aaec2000_int_mask(unsigned int irq) |
| 77 | { |
| 78 | IRQ_INTENC |= (1 << irq); |
| 79 | } |
| 80 | |
| 81 | static void aaec2000_int_unmask(unsigned int irq) |
| 82 | { |
| 83 | IRQ_INTENS |= (1 << irq); |
| 84 | } |
| 85 | |
| 86 | static struct irqchip aaec2000_irq_chip = { |
| 87 | .ack = aaec2000_int_ack, |
| 88 | .mask = aaec2000_int_mask, |
| 89 | .unmask = aaec2000_int_unmask, |
| 90 | }; |
| 91 | |
| 92 | void __init aaec2000_init_irq(void) |
| 93 | { |
| 94 | unsigned int i; |
| 95 | |
| 96 | for (i = 0; i < NR_IRQS; i++) { |
| 97 | set_irq_handler(i, do_level_IRQ); |
| 98 | set_irq_chip(i, &aaec2000_irq_chip); |
| 99 | set_irq_flags(i, IRQF_VALID); |
| 100 | } |
| 101 | |
| 102 | /* Disable all interrupts */ |
| 103 | IRQ_INTENC = 0xffffffff; |
| 104 | |
| 105 | /* Clear any pending interrupts */ |
| 106 | IRQ_INTSR = IRQ_INTSR; |
| 107 | } |
| 108 | |
| 109 | /* |
| 110 | * Time keeping |
| 111 | */ |
| 112 | /* IRQs are disabled before entering here from do_gettimeofday() */ |
| 113 | static unsigned long aaec2000_gettimeoffset(void) |
| 114 | { |
| 115 | unsigned long ticks_to_match, elapsed, usec; |
| 116 | |
| 117 | /* Get ticks before next timer match */ |
| 118 | ticks_to_match = TIMER1_LOAD - TIMER1_VAL; |
| 119 | |
| 120 | /* We need elapsed ticks since last match */ |
| 121 | elapsed = LATCH - ticks_to_match; |
| 122 | |
| 123 | /* Now, convert them to usec */ |
| 124 | usec = (unsigned long)(elapsed * (tick_nsec / 1000))/LATCH; |
| 125 | |
| 126 | return usec; |
| 127 | } |
| 128 | |
| 129 | /* We enter here with IRQs enabled */ |
| 130 | static irqreturn_t |
| 131 | aaec2000_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) |
| 132 | { |
| 133 | /* TODO: Check timer accuracy */ |
| 134 | write_seqlock(&xtime_lock); |
| 135 | |
| 136 | timer_tick(regs); |
| 137 | TIMER1_CLEAR = 1; |
| 138 | |
| 139 | write_sequnlock(&xtime_lock); |
| 140 | |
| 141 | return IRQ_HANDLED; |
| 142 | } |
| 143 | |
| 144 | static struct irqaction aaec2000_timer_irq = { |
| 145 | .name = "AAEC-2000 Timer Tick", |
Russell King | 09b8b5f | 2005-06-26 17:06:36 +0100 | [diff] [blame] | 146 | .flags = SA_INTERRUPT | SA_TIMER, |
| 147 | .handler = aaec2000_timer_interrupt, |
Bellido Nicolas | 038c5b6 | 2005-06-20 18:51:05 +0100 | [diff] [blame] | 148 | }; |
| 149 | |
| 150 | static void __init aaec2000_timer_init(void) |
| 151 | { |
| 152 | /* Disable timer 1 */ |
| 153 | TIMER1_CTRL = 0; |
| 154 | |
| 155 | /* We have somehow to generate a 100Hz clock. |
| 156 | * We then use the 508KHz timer in periodic mode. |
| 157 | */ |
| 158 | TIMER1_LOAD = LATCH; |
| 159 | TIMER1_CLEAR = 1; /* Clear interrupt */ |
| 160 | |
| 161 | setup_irq(INT_TMR1_OFL, &aaec2000_timer_irq); |
| 162 | |
| 163 | TIMER1_CTRL = TIMER_CTRL_ENABLE | |
| 164 | TIMER_CTRL_PERIODIC | |
| 165 | TIMER_CTRL_CLKSEL_508K; |
| 166 | } |
| 167 | |
| 168 | struct sys_timer aaec2000_timer = { |
| 169 | .init = aaec2000_timer_init, |
| 170 | .offset = aaec2000_gettimeoffset, |
| 171 | }; |
| 172 | |
Bellido Nicolas | 049eb32 | 2005-10-28 16:51:44 +0100 | [diff] [blame] | 173 | static struct clcd_panel mach_clcd_panel; |
| 174 | |
| 175 | static int aaec2000_clcd_setup(struct clcd_fb *fb) |
| 176 | { |
| 177 | dma_addr_t dma; |
| 178 | |
| 179 | fb->panel = &mach_clcd_panel; |
| 180 | |
| 181 | fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, SZ_1M, |
| 182 | &dma, GFP_KERNEL); |
| 183 | |
| 184 | if (!fb->fb.screen_base) { |
| 185 | printk(KERN_ERR "CLCD: unable to map framebuffer\n"); |
| 186 | return -ENOMEM; |
| 187 | } |
| 188 | |
| 189 | fb->fb.fix.smem_start = dma; |
| 190 | fb->fb.fix.smem_len = SZ_1M; |
| 191 | |
| 192 | return 0; |
| 193 | } |
| 194 | |
| 195 | static int aaec2000_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma) |
| 196 | { |
| 197 | return dma_mmap_writecombine(&fb->dev->dev, vma, |
| 198 | fb->fb.screen_base, |
| 199 | fb->fb.fix.smem_start, |
| 200 | fb->fb.fix.smem_len); |
| 201 | } |
| 202 | |
| 203 | static void aaec2000_clcd_remove(struct clcd_fb *fb) |
| 204 | { |
| 205 | dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len, |
| 206 | fb->fb.screen_base, fb->fb.fix.smem_start); |
| 207 | } |
| 208 | |
| 209 | static struct clcd_board clcd_plat_data = { |
| 210 | .name = "AAEC-2000", |
| 211 | .check = clcdfb_check, |
| 212 | .decode = clcdfb_decode, |
| 213 | .setup = aaec2000_clcd_setup, |
| 214 | .mmap = aaec2000_clcd_mmap, |
| 215 | .remove = aaec2000_clcd_remove, |
| 216 | }; |
| 217 | |
| 218 | static struct amba_device clcd_device = { |
| 219 | .dev = { |
| 220 | .bus_id = "mb:16", |
| 221 | .coherent_dma_mask = ~0, |
| 222 | .platform_data = &clcd_plat_data, |
| 223 | }, |
| 224 | .res = { |
| 225 | .start = AAEC_CLCD_PHYS, |
| 226 | .end = AAEC_CLCD_PHYS + SZ_4K - 1, |
| 227 | .flags = IORESOURCE_MEM, |
| 228 | }, |
| 229 | .irq = { INT_LCD, NO_IRQ }, |
| 230 | .periphid = 0x41110, |
| 231 | }; |
| 232 | |
| 233 | static struct amba_device *amba_devs[] __initdata = { |
| 234 | &clcd_device, |
| 235 | }; |
| 236 | |
| 237 | static struct clk aaec2000_clcd_clk = { |
| 238 | .name = "CLCDCLK", |
| 239 | }; |
| 240 | |
| 241 | void __init aaec2000_set_clcd_plat_data(struct aaec2000_clcd_info *clcd) |
| 242 | { |
| 243 | clcd_plat_data.enable = clcd->enable; |
| 244 | clcd_plat_data.disable = clcd->disable; |
| 245 | memcpy(&mach_clcd_panel, &clcd->panel, sizeof(struct clcd_panel)); |
| 246 | } |
| 247 | |
Bellido Nicolas | 4a91ca2 | 2005-10-28 16:51:42 +0100 | [diff] [blame] | 248 | static struct flash_platform_data aaec2000_flash_data = { |
| 249 | .map_name = "cfi_probe", |
| 250 | .width = 4, |
| 251 | }; |
| 252 | |
| 253 | static struct resource aaec2000_flash_resource = { |
| 254 | .start = AAEC_FLASH_BASE, |
| 255 | .end = AAEC_FLASH_BASE + AAEC_FLASH_SIZE, |
| 256 | .flags = IORESOURCE_MEM, |
| 257 | }; |
| 258 | |
| 259 | static struct platform_device aaec2000_flash_device = { |
| 260 | .name = "armflash", |
| 261 | .id = 0, |
| 262 | .dev = { |
| 263 | .platform_data = &aaec2000_flash_data, |
| 264 | }, |
| 265 | .num_resources = 1, |
| 266 | .resource = &aaec2000_flash_resource, |
| 267 | }; |
| 268 | |
| 269 | static int __init aaec2000_init(void) |
| 270 | { |
Bellido Nicolas | 049eb32 | 2005-10-28 16:51:44 +0100 | [diff] [blame] | 271 | int i; |
| 272 | |
| 273 | clk_register(&aaec2000_clcd_clk); |
| 274 | |
| 275 | for (i = 0; i < ARRAY_SIZE(amba_devs); i++) { |
| 276 | struct amba_device *d = amba_devs[i]; |
| 277 | amba_device_register(d, &iomem_resource); |
| 278 | } |
| 279 | |
Bellido Nicolas | 4a91ca2 | 2005-10-28 16:51:42 +0100 | [diff] [blame] | 280 | platform_device_register(&aaec2000_flash_device); |
| 281 | |
| 282 | return 0; |
| 283 | }; |
| 284 | arch_initcall(aaec2000_init); |
| 285 | |