Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-clps7500/core.c |
| 3 | * |
| 4 | * Copyright (C) 1998 Russell King |
| 5 | * Copyright (C) 1999 Nexus Electronics Ltd |
| 6 | * |
| 7 | * Extra MM routines for CL7500 architecture |
| 8 | */ |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/types.h> |
| 11 | #include <linux/interrupt.h> |
Thomas Gleixner | cb03f87 | 2006-07-01 22:32:33 +0100 | [diff] [blame^] | 12 | #include <linux/irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/list.h> |
| 14 | #include <linux/sched.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/device.h> |
| 17 | #include <linux/serial_8250.h> |
| 18 | |
| 19 | #include <asm/mach/arch.h> |
| 20 | #include <asm/mach/map.h> |
| 21 | #include <asm/mach/irq.h> |
| 22 | #include <asm/mach/time.h> |
| 23 | |
| 24 | #include <asm/hardware.h> |
| 25 | #include <asm/hardware/iomd.h> |
| 26 | #include <asm/io.h> |
| 27 | #include <asm/irq.h> |
| 28 | #include <asm/mach-types.h> |
| 29 | |
Russell King | 0521621 | 2005-06-22 09:56:57 +0100 | [diff] [blame] | 30 | unsigned int vram_size; |
| 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | static void cl7500_ack_irq_a(unsigned int irq) |
| 33 | { |
| 34 | unsigned int val, mask; |
| 35 | |
| 36 | mask = 1 << irq; |
| 37 | val = iomd_readb(IOMD_IRQMASKA); |
| 38 | iomd_writeb(val & ~mask, IOMD_IRQMASKA); |
| 39 | iomd_writeb(mask, IOMD_IRQCLRA); |
| 40 | } |
| 41 | |
| 42 | static void cl7500_mask_irq_a(unsigned int irq) |
| 43 | { |
| 44 | unsigned int val, mask; |
| 45 | |
| 46 | mask = 1 << irq; |
| 47 | val = iomd_readb(IOMD_IRQMASKA); |
| 48 | iomd_writeb(val & ~mask, IOMD_IRQMASKA); |
| 49 | } |
| 50 | |
| 51 | static void cl7500_unmask_irq_a(unsigned int irq) |
| 52 | { |
| 53 | unsigned int val, mask; |
| 54 | |
| 55 | mask = 1 << irq; |
| 56 | val = iomd_readb(IOMD_IRQMASKA); |
| 57 | iomd_writeb(val | mask, IOMD_IRQMASKA); |
| 58 | } |
| 59 | |
| 60 | static struct irqchip clps7500_a_chip = { |
| 61 | .ack = cl7500_ack_irq_a, |
| 62 | .mask = cl7500_mask_irq_a, |
| 63 | .unmask = cl7500_unmask_irq_a, |
| 64 | }; |
| 65 | |
| 66 | static void cl7500_mask_irq_b(unsigned int irq) |
| 67 | { |
| 68 | unsigned int val, mask; |
| 69 | |
| 70 | mask = 1 << (irq & 7); |
| 71 | val = iomd_readb(IOMD_IRQMASKB); |
| 72 | iomd_writeb(val & ~mask, IOMD_IRQMASKB); |
| 73 | } |
| 74 | |
| 75 | static void cl7500_unmask_irq_b(unsigned int irq) |
| 76 | { |
| 77 | unsigned int val, mask; |
| 78 | |
| 79 | mask = 1 << (irq & 7); |
| 80 | val = iomd_readb(IOMD_IRQMASKB); |
| 81 | iomd_writeb(val | mask, IOMD_IRQMASKB); |
| 82 | } |
| 83 | |
| 84 | static struct irqchip clps7500_b_chip = { |
| 85 | .ack = cl7500_mask_irq_b, |
| 86 | .mask = cl7500_mask_irq_b, |
| 87 | .unmask = cl7500_unmask_irq_b, |
| 88 | }; |
| 89 | |
| 90 | static void cl7500_mask_irq_c(unsigned int irq) |
| 91 | { |
| 92 | unsigned int val, mask; |
| 93 | |
| 94 | mask = 1 << (irq & 7); |
| 95 | val = iomd_readb(IOMD_IRQMASKC); |
| 96 | iomd_writeb(val & ~mask, IOMD_IRQMASKC); |
| 97 | } |
| 98 | |
| 99 | static void cl7500_unmask_irq_c(unsigned int irq) |
| 100 | { |
| 101 | unsigned int val, mask; |
| 102 | |
| 103 | mask = 1 << (irq & 7); |
| 104 | val = iomd_readb(IOMD_IRQMASKC); |
| 105 | iomd_writeb(val | mask, IOMD_IRQMASKC); |
| 106 | } |
| 107 | |
| 108 | static struct irqchip clps7500_c_chip = { |
| 109 | .ack = cl7500_mask_irq_c, |
| 110 | .mask = cl7500_mask_irq_c, |
| 111 | .unmask = cl7500_unmask_irq_c, |
| 112 | }; |
| 113 | |
| 114 | static void cl7500_mask_irq_d(unsigned int irq) |
| 115 | { |
| 116 | unsigned int val, mask; |
| 117 | |
| 118 | mask = 1 << (irq & 7); |
| 119 | val = iomd_readb(IOMD_IRQMASKD); |
| 120 | iomd_writeb(val & ~mask, IOMD_IRQMASKD); |
| 121 | } |
| 122 | |
| 123 | static void cl7500_unmask_irq_d(unsigned int irq) |
| 124 | { |
| 125 | unsigned int val, mask; |
| 126 | |
| 127 | mask = 1 << (irq & 7); |
| 128 | val = iomd_readb(IOMD_IRQMASKD); |
| 129 | iomd_writeb(val | mask, IOMD_IRQMASKD); |
| 130 | } |
| 131 | |
| 132 | static struct irqchip clps7500_d_chip = { |
| 133 | .ack = cl7500_mask_irq_d, |
| 134 | .mask = cl7500_mask_irq_d, |
| 135 | .unmask = cl7500_unmask_irq_d, |
| 136 | }; |
| 137 | |
| 138 | static void cl7500_mask_irq_dma(unsigned int irq) |
| 139 | { |
| 140 | unsigned int val, mask; |
| 141 | |
| 142 | mask = 1 << (irq & 7); |
| 143 | val = iomd_readb(IOMD_DMAMASK); |
| 144 | iomd_writeb(val & ~mask, IOMD_DMAMASK); |
| 145 | } |
| 146 | |
| 147 | static void cl7500_unmask_irq_dma(unsigned int irq) |
| 148 | { |
| 149 | unsigned int val, mask; |
| 150 | |
| 151 | mask = 1 << (irq & 7); |
| 152 | val = iomd_readb(IOMD_DMAMASK); |
| 153 | iomd_writeb(val | mask, IOMD_DMAMASK); |
| 154 | } |
| 155 | |
| 156 | static struct irqchip clps7500_dma_chip = { |
| 157 | .ack = cl7500_mask_irq_dma, |
| 158 | .mask = cl7500_mask_irq_dma, |
| 159 | .unmask = cl7500_unmask_irq_dma, |
| 160 | }; |
| 161 | |
| 162 | static void cl7500_mask_irq_fiq(unsigned int irq) |
| 163 | { |
| 164 | unsigned int val, mask; |
| 165 | |
| 166 | mask = 1 << (irq & 7); |
| 167 | val = iomd_readb(IOMD_FIQMASK); |
| 168 | iomd_writeb(val & ~mask, IOMD_FIQMASK); |
| 169 | } |
| 170 | |
| 171 | static void cl7500_unmask_irq_fiq(unsigned int irq) |
| 172 | { |
| 173 | unsigned int val, mask; |
| 174 | |
| 175 | mask = 1 << (irq & 7); |
| 176 | val = iomd_readb(IOMD_FIQMASK); |
| 177 | iomd_writeb(val | mask, IOMD_FIQMASK); |
| 178 | } |
| 179 | |
| 180 | static struct irqchip clps7500_fiq_chip = { |
| 181 | .ack = cl7500_mask_irq_fiq, |
| 182 | .mask = cl7500_mask_irq_fiq, |
| 183 | .unmask = cl7500_unmask_irq_fiq, |
| 184 | }; |
| 185 | |
| 186 | static void cl7500_no_action(unsigned int irq) |
| 187 | { |
| 188 | } |
| 189 | |
| 190 | static struct irqchip clps7500_no_chip = { |
| 191 | .ack = cl7500_no_action, |
| 192 | .mask = cl7500_no_action, |
| 193 | .unmask = cl7500_no_action, |
| 194 | }; |
| 195 | |
| 196 | static struct irqaction irq_isa = { no_action, 0, CPU_MASK_NONE, "isa", NULL, NULL }; |
| 197 | |
| 198 | static void __init clps7500_init_irq(void) |
| 199 | { |
| 200 | unsigned int irq, flags; |
| 201 | |
| 202 | iomd_writeb(0, IOMD_IRQMASKA); |
| 203 | iomd_writeb(0, IOMD_IRQMASKB); |
| 204 | iomd_writeb(0, IOMD_FIQMASK); |
| 205 | iomd_writeb(0, IOMD_DMAMASK); |
| 206 | |
| 207 | for (irq = 0; irq < NR_IRQS; irq++) { |
| 208 | flags = IRQF_VALID; |
| 209 | |
| 210 | if (irq <= 6 || (irq >= 9 && irq <= 15) || |
| 211 | (irq >= 48 && irq <= 55)) |
| 212 | flags |= IRQF_PROBE; |
| 213 | |
| 214 | switch (irq) { |
| 215 | case 0 ... 7: |
| 216 | set_irq_chip(irq, &clps7500_a_chip); |
| 217 | set_irq_handler(irq, do_level_IRQ); |
| 218 | set_irq_flags(irq, flags); |
| 219 | break; |
| 220 | |
| 221 | case 8 ... 15: |
| 222 | set_irq_chip(irq, &clps7500_b_chip); |
| 223 | set_irq_handler(irq, do_level_IRQ); |
| 224 | set_irq_flags(irq, flags); |
| 225 | break; |
| 226 | |
| 227 | case 16 ... 22: |
| 228 | set_irq_chip(irq, &clps7500_dma_chip); |
| 229 | set_irq_handler(irq, do_level_IRQ); |
| 230 | set_irq_flags(irq, flags); |
| 231 | break; |
| 232 | |
| 233 | case 24 ... 31: |
| 234 | set_irq_chip(irq, &clps7500_c_chip); |
| 235 | set_irq_handler(irq, do_level_IRQ); |
| 236 | set_irq_flags(irq, flags); |
| 237 | break; |
| 238 | |
| 239 | case 40 ... 47: |
| 240 | set_irq_chip(irq, &clps7500_d_chip); |
| 241 | set_irq_handler(irq, do_level_IRQ); |
| 242 | set_irq_flags(irq, flags); |
| 243 | break; |
| 244 | |
| 245 | case 48 ... 55: |
| 246 | set_irq_chip(irq, &clps7500_no_chip); |
| 247 | set_irq_handler(irq, do_level_IRQ); |
| 248 | set_irq_flags(irq, flags); |
| 249 | break; |
| 250 | |
| 251 | case 64 ... 72: |
| 252 | set_irq_chip(irq, &clps7500_fiq_chip); |
| 253 | set_irq_handler(irq, do_level_IRQ); |
| 254 | set_irq_flags(irq, flags); |
| 255 | break; |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | setup_irq(IRQ_ISA, &irq_isa); |
| 260 | } |
| 261 | |
| 262 | static struct map_desc cl7500_io_desc[] __initdata = { |
Deepak Saxena | d157e9e | 2005-10-28 15:19:05 +0100 | [diff] [blame] | 263 | { /* IO space */ |
Russell King | 9b73fcf | 2005-11-21 17:03:15 +0000 | [diff] [blame] | 264 | .virtual = (unsigned long)IO_BASE, |
Deepak Saxena | d157e9e | 2005-10-28 15:19:05 +0100 | [diff] [blame] | 265 | .pfn = __phys_to_pfn(IO_START), |
| 266 | .length = IO_SIZE, |
| 267 | .type = MT_DEVICE |
| 268 | }, { /* ISA space */ |
| 269 | .virtual = ISA_BASE, |
| 270 | .pfn = __phys_to_pfn(ISA_START), |
| 271 | .length = ISA_SIZE, |
| 272 | .type = MT_DEVICE |
| 273 | }, { /* Flash */ |
| 274 | .virtual = FLASH_BASE, |
| 275 | .pfn = __phys_to_pfn(FLASH_START), |
| 276 | .length = FLASH_SIZE, |
| 277 | .type = MT_DEVICE |
| 278 | }, { /* LED */ |
| 279 | .virtual = LED_BASE, |
| 280 | .pfn = __phys_to_pfn(LED_START), |
| 281 | .length = LED_SIZE, |
| 282 | .type = MT_DEVICE |
| 283 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | }; |
| 285 | |
| 286 | static void __init clps7500_map_io(void) |
| 287 | { |
| 288 | iotable_init(cl7500_io_desc, ARRAY_SIZE(cl7500_io_desc)); |
| 289 | } |
| 290 | |
| 291 | extern void ioctime_init(void); |
| 292 | extern unsigned long ioc_timer_gettimeoffset(void); |
| 293 | |
| 294 | static irqreturn_t |
| 295 | clps7500_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) |
| 296 | { |
| 297 | write_seqlock(&xtime_lock); |
| 298 | |
| 299 | timer_tick(regs); |
| 300 | |
| 301 | /* Why not using do_leds interface?? */ |
| 302 | { |
| 303 | /* Twinkle the lights. */ |
| 304 | static int count, state = 0xff00; |
| 305 | if (count-- == 0) { |
| 306 | state ^= 0x100; |
| 307 | count = 25; |
| 308 | *((volatile unsigned int *)LED_ADDRESS) = state; |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | write_sequnlock(&xtime_lock); |
| 313 | |
| 314 | return IRQ_HANDLED; |
| 315 | } |
| 316 | |
| 317 | static struct irqaction clps7500_timer_irq = { |
| 318 | .name = "CLPS7500 Timer Tick", |
Russell King | 09b8b5f | 2005-06-26 17:06:36 +0100 | [diff] [blame] | 319 | .flags = SA_INTERRUPT | SA_TIMER, |
| 320 | .handler = clps7500_timer_interrupt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | }; |
| 322 | |
| 323 | /* |
| 324 | * Set up timer interrupt. |
| 325 | */ |
| 326 | static void __init clps7500_timer_init(void) |
| 327 | { |
| 328 | ioctime_init(); |
| 329 | setup_irq(IRQ_TIMER, &clps7500_timer_irq); |
| 330 | } |
| 331 | |
| 332 | static struct sys_timer clps7500_timer = { |
| 333 | .init = clps7500_timer_init, |
| 334 | .offset = ioc_timer_gettimeoffset, |
| 335 | }; |
| 336 | |
| 337 | static struct plat_serial8250_port serial_platform_data[] = { |
| 338 | { |
| 339 | .mapbase = 0x03010fe0, |
| 340 | .irq = 10, |
| 341 | .uartclk = 1843200, |
| 342 | .regshift = 2, |
| 343 | .iotype = UPIO_MEM, |
| 344 | .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST, |
| 345 | }, |
| 346 | { |
| 347 | .mapbase = 0x03010be0, |
| 348 | .irq = 0, |
| 349 | .uartclk = 1843200, |
| 350 | .regshift = 2, |
| 351 | .iotype = UPIO_MEM, |
| 352 | .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST, |
| 353 | }, |
| 354 | { |
| 355 | .iobase = ISASLOT_IO + 0x2e8, |
| 356 | .irq = 41, |
| 357 | .uartclk = 1843200, |
| 358 | .regshift = 0, |
| 359 | .iotype = UPIO_PORT, |
| 360 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, |
| 361 | }, |
| 362 | { |
| 363 | .iobase = ISASLOT_IO + 0x3e8, |
| 364 | .irq = 40, |
| 365 | .uartclk = 1843200, |
| 366 | .regshift = 0, |
| 367 | .iotype = UPIO_PORT, |
| 368 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, |
| 369 | }, |
| 370 | { }, |
| 371 | }; |
| 372 | |
| 373 | static struct platform_device serial_device = { |
| 374 | .name = "serial8250", |
Russell King | 6df29de | 2005-09-08 16:04:41 +0100 | [diff] [blame] | 375 | .id = PLAT8250_DEV_PLATFORM, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | .dev = { |
| 377 | .platform_data = serial_platform_data, |
| 378 | }, |
| 379 | }; |
| 380 | |
| 381 | static void __init clps7500_init(void) |
| 382 | { |
| 383 | platform_device_register(&serial_device); |
| 384 | } |
| 385 | |
| 386 | MACHINE_START(CLPS7500, "CL-PS7500") |
Russell King | e9dea0c | 2005-07-03 17:38:58 +0100 | [diff] [blame] | 387 | /* Maintainer: Philip Blundell */ |
Russell King | e9dea0c | 2005-07-03 17:38:58 +0100 | [diff] [blame] | 388 | .phys_io = 0x03000000, |
| 389 | .io_pg_offst = ((0xe0000000) >> 18) & 0xfffc, |
| 390 | .map_io = clps7500_map_io, |
| 391 | .init_irq = clps7500_init_irq, |
| 392 | .init_machine = clps7500_init, |
| 393 | .timer = &clps7500_timer, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | MACHINE_END |
| 395 | |