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> |
| 12 | #include <linux/list.h> |
| 13 | #include <linux/sched.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/device.h> |
| 16 | #include <linux/serial_8250.h> |
| 17 | |
| 18 | #include <asm/mach/arch.h> |
| 19 | #include <asm/mach/map.h> |
| 20 | #include <asm/mach/irq.h> |
| 21 | #include <asm/mach/time.h> |
| 22 | |
| 23 | #include <asm/hardware.h> |
| 24 | #include <asm/hardware/iomd.h> |
| 25 | #include <asm/io.h> |
| 26 | #include <asm/irq.h> |
| 27 | #include <asm/mach-types.h> |
| 28 | |
| 29 | static void cl7500_ack_irq_a(unsigned int irq) |
| 30 | { |
| 31 | unsigned int val, mask; |
| 32 | |
| 33 | mask = 1 << irq; |
| 34 | val = iomd_readb(IOMD_IRQMASKA); |
| 35 | iomd_writeb(val & ~mask, IOMD_IRQMASKA); |
| 36 | iomd_writeb(mask, IOMD_IRQCLRA); |
| 37 | } |
| 38 | |
| 39 | static void cl7500_mask_irq_a(unsigned int irq) |
| 40 | { |
| 41 | unsigned int val, mask; |
| 42 | |
| 43 | mask = 1 << irq; |
| 44 | val = iomd_readb(IOMD_IRQMASKA); |
| 45 | iomd_writeb(val & ~mask, IOMD_IRQMASKA); |
| 46 | } |
| 47 | |
| 48 | static void cl7500_unmask_irq_a(unsigned int irq) |
| 49 | { |
| 50 | unsigned int val, mask; |
| 51 | |
| 52 | mask = 1 << irq; |
| 53 | val = iomd_readb(IOMD_IRQMASKA); |
| 54 | iomd_writeb(val | mask, IOMD_IRQMASKA); |
| 55 | } |
| 56 | |
| 57 | static struct irqchip clps7500_a_chip = { |
| 58 | .ack = cl7500_ack_irq_a, |
| 59 | .mask = cl7500_mask_irq_a, |
| 60 | .unmask = cl7500_unmask_irq_a, |
| 61 | }; |
| 62 | |
| 63 | static void cl7500_mask_irq_b(unsigned int irq) |
| 64 | { |
| 65 | unsigned int val, mask; |
| 66 | |
| 67 | mask = 1 << (irq & 7); |
| 68 | val = iomd_readb(IOMD_IRQMASKB); |
| 69 | iomd_writeb(val & ~mask, IOMD_IRQMASKB); |
| 70 | } |
| 71 | |
| 72 | static void cl7500_unmask_irq_b(unsigned int irq) |
| 73 | { |
| 74 | unsigned int val, mask; |
| 75 | |
| 76 | mask = 1 << (irq & 7); |
| 77 | val = iomd_readb(IOMD_IRQMASKB); |
| 78 | iomd_writeb(val | mask, IOMD_IRQMASKB); |
| 79 | } |
| 80 | |
| 81 | static struct irqchip clps7500_b_chip = { |
| 82 | .ack = cl7500_mask_irq_b, |
| 83 | .mask = cl7500_mask_irq_b, |
| 84 | .unmask = cl7500_unmask_irq_b, |
| 85 | }; |
| 86 | |
| 87 | static void cl7500_mask_irq_c(unsigned int irq) |
| 88 | { |
| 89 | unsigned int val, mask; |
| 90 | |
| 91 | mask = 1 << (irq & 7); |
| 92 | val = iomd_readb(IOMD_IRQMASKC); |
| 93 | iomd_writeb(val & ~mask, IOMD_IRQMASKC); |
| 94 | } |
| 95 | |
| 96 | static void cl7500_unmask_irq_c(unsigned int irq) |
| 97 | { |
| 98 | unsigned int val, mask; |
| 99 | |
| 100 | mask = 1 << (irq & 7); |
| 101 | val = iomd_readb(IOMD_IRQMASKC); |
| 102 | iomd_writeb(val | mask, IOMD_IRQMASKC); |
| 103 | } |
| 104 | |
| 105 | static struct irqchip clps7500_c_chip = { |
| 106 | .ack = cl7500_mask_irq_c, |
| 107 | .mask = cl7500_mask_irq_c, |
| 108 | .unmask = cl7500_unmask_irq_c, |
| 109 | }; |
| 110 | |
| 111 | static void cl7500_mask_irq_d(unsigned int irq) |
| 112 | { |
| 113 | unsigned int val, mask; |
| 114 | |
| 115 | mask = 1 << (irq & 7); |
| 116 | val = iomd_readb(IOMD_IRQMASKD); |
| 117 | iomd_writeb(val & ~mask, IOMD_IRQMASKD); |
| 118 | } |
| 119 | |
| 120 | static void cl7500_unmask_irq_d(unsigned int irq) |
| 121 | { |
| 122 | unsigned int val, mask; |
| 123 | |
| 124 | mask = 1 << (irq & 7); |
| 125 | val = iomd_readb(IOMD_IRQMASKD); |
| 126 | iomd_writeb(val | mask, IOMD_IRQMASKD); |
| 127 | } |
| 128 | |
| 129 | static struct irqchip clps7500_d_chip = { |
| 130 | .ack = cl7500_mask_irq_d, |
| 131 | .mask = cl7500_mask_irq_d, |
| 132 | .unmask = cl7500_unmask_irq_d, |
| 133 | }; |
| 134 | |
| 135 | static void cl7500_mask_irq_dma(unsigned int irq) |
| 136 | { |
| 137 | unsigned int val, mask; |
| 138 | |
| 139 | mask = 1 << (irq & 7); |
| 140 | val = iomd_readb(IOMD_DMAMASK); |
| 141 | iomd_writeb(val & ~mask, IOMD_DMAMASK); |
| 142 | } |
| 143 | |
| 144 | static void cl7500_unmask_irq_dma(unsigned int irq) |
| 145 | { |
| 146 | unsigned int val, mask; |
| 147 | |
| 148 | mask = 1 << (irq & 7); |
| 149 | val = iomd_readb(IOMD_DMAMASK); |
| 150 | iomd_writeb(val | mask, IOMD_DMAMASK); |
| 151 | } |
| 152 | |
| 153 | static struct irqchip clps7500_dma_chip = { |
| 154 | .ack = cl7500_mask_irq_dma, |
| 155 | .mask = cl7500_mask_irq_dma, |
| 156 | .unmask = cl7500_unmask_irq_dma, |
| 157 | }; |
| 158 | |
| 159 | static void cl7500_mask_irq_fiq(unsigned int irq) |
| 160 | { |
| 161 | unsigned int val, mask; |
| 162 | |
| 163 | mask = 1 << (irq & 7); |
| 164 | val = iomd_readb(IOMD_FIQMASK); |
| 165 | iomd_writeb(val & ~mask, IOMD_FIQMASK); |
| 166 | } |
| 167 | |
| 168 | static void cl7500_unmask_irq_fiq(unsigned int irq) |
| 169 | { |
| 170 | unsigned int val, mask; |
| 171 | |
| 172 | mask = 1 << (irq & 7); |
| 173 | val = iomd_readb(IOMD_FIQMASK); |
| 174 | iomd_writeb(val | mask, IOMD_FIQMASK); |
| 175 | } |
| 176 | |
| 177 | static struct irqchip clps7500_fiq_chip = { |
| 178 | .ack = cl7500_mask_irq_fiq, |
| 179 | .mask = cl7500_mask_irq_fiq, |
| 180 | .unmask = cl7500_unmask_irq_fiq, |
| 181 | }; |
| 182 | |
| 183 | static void cl7500_no_action(unsigned int irq) |
| 184 | { |
| 185 | } |
| 186 | |
| 187 | static struct irqchip clps7500_no_chip = { |
| 188 | .ack = cl7500_no_action, |
| 189 | .mask = cl7500_no_action, |
| 190 | .unmask = cl7500_no_action, |
| 191 | }; |
| 192 | |
| 193 | static struct irqaction irq_isa = { no_action, 0, CPU_MASK_NONE, "isa", NULL, NULL }; |
| 194 | |
| 195 | static void __init clps7500_init_irq(void) |
| 196 | { |
| 197 | unsigned int irq, flags; |
| 198 | |
| 199 | iomd_writeb(0, IOMD_IRQMASKA); |
| 200 | iomd_writeb(0, IOMD_IRQMASKB); |
| 201 | iomd_writeb(0, IOMD_FIQMASK); |
| 202 | iomd_writeb(0, IOMD_DMAMASK); |
| 203 | |
| 204 | for (irq = 0; irq < NR_IRQS; irq++) { |
| 205 | flags = IRQF_VALID; |
| 206 | |
| 207 | if (irq <= 6 || (irq >= 9 && irq <= 15) || |
| 208 | (irq >= 48 && irq <= 55)) |
| 209 | flags |= IRQF_PROBE; |
| 210 | |
| 211 | switch (irq) { |
| 212 | case 0 ... 7: |
| 213 | set_irq_chip(irq, &clps7500_a_chip); |
| 214 | set_irq_handler(irq, do_level_IRQ); |
| 215 | set_irq_flags(irq, flags); |
| 216 | break; |
| 217 | |
| 218 | case 8 ... 15: |
| 219 | set_irq_chip(irq, &clps7500_b_chip); |
| 220 | set_irq_handler(irq, do_level_IRQ); |
| 221 | set_irq_flags(irq, flags); |
| 222 | break; |
| 223 | |
| 224 | case 16 ... 22: |
| 225 | set_irq_chip(irq, &clps7500_dma_chip); |
| 226 | set_irq_handler(irq, do_level_IRQ); |
| 227 | set_irq_flags(irq, flags); |
| 228 | break; |
| 229 | |
| 230 | case 24 ... 31: |
| 231 | set_irq_chip(irq, &clps7500_c_chip); |
| 232 | set_irq_handler(irq, do_level_IRQ); |
| 233 | set_irq_flags(irq, flags); |
| 234 | break; |
| 235 | |
| 236 | case 40 ... 47: |
| 237 | set_irq_chip(irq, &clps7500_d_chip); |
| 238 | set_irq_handler(irq, do_level_IRQ); |
| 239 | set_irq_flags(irq, flags); |
| 240 | break; |
| 241 | |
| 242 | case 48 ... 55: |
| 243 | set_irq_chip(irq, &clps7500_no_chip); |
| 244 | set_irq_handler(irq, do_level_IRQ); |
| 245 | set_irq_flags(irq, flags); |
| 246 | break; |
| 247 | |
| 248 | case 64 ... 72: |
| 249 | set_irq_chip(irq, &clps7500_fiq_chip); |
| 250 | set_irq_handler(irq, do_level_IRQ); |
| 251 | set_irq_flags(irq, flags); |
| 252 | break; |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | setup_irq(IRQ_ISA, &irq_isa); |
| 257 | } |
| 258 | |
| 259 | static struct map_desc cl7500_io_desc[] __initdata = { |
| 260 | { IO_BASE, IO_START, IO_SIZE, MT_DEVICE }, /* IO space */ |
| 261 | { ISA_BASE, ISA_START, ISA_SIZE, MT_DEVICE }, /* ISA space */ |
| 262 | { FLASH_BASE, FLASH_START, FLASH_SIZE, MT_DEVICE }, /* Flash */ |
| 263 | { LED_BASE, LED_START, LED_SIZE, MT_DEVICE } /* LED */ |
| 264 | }; |
| 265 | |
| 266 | static void __init clps7500_map_io(void) |
| 267 | { |
| 268 | iotable_init(cl7500_io_desc, ARRAY_SIZE(cl7500_io_desc)); |
| 269 | } |
| 270 | |
| 271 | extern void ioctime_init(void); |
| 272 | extern unsigned long ioc_timer_gettimeoffset(void); |
| 273 | |
| 274 | static irqreturn_t |
| 275 | clps7500_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) |
| 276 | { |
| 277 | write_seqlock(&xtime_lock); |
| 278 | |
| 279 | timer_tick(regs); |
| 280 | |
| 281 | /* Why not using do_leds interface?? */ |
| 282 | { |
| 283 | /* Twinkle the lights. */ |
| 284 | static int count, state = 0xff00; |
| 285 | if (count-- == 0) { |
| 286 | state ^= 0x100; |
| 287 | count = 25; |
| 288 | *((volatile unsigned int *)LED_ADDRESS) = state; |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | write_sequnlock(&xtime_lock); |
| 293 | |
| 294 | return IRQ_HANDLED; |
| 295 | } |
| 296 | |
| 297 | static struct irqaction clps7500_timer_irq = { |
| 298 | .name = "CLPS7500 Timer Tick", |
| 299 | .flags = SA_INTERRUPT, |
| 300 | .handler = clps7500_timer_interrupt |
| 301 | }; |
| 302 | |
| 303 | /* |
| 304 | * Set up timer interrupt. |
| 305 | */ |
| 306 | static void __init clps7500_timer_init(void) |
| 307 | { |
| 308 | ioctime_init(); |
| 309 | setup_irq(IRQ_TIMER, &clps7500_timer_irq); |
| 310 | } |
| 311 | |
| 312 | static struct sys_timer clps7500_timer = { |
| 313 | .init = clps7500_timer_init, |
| 314 | .offset = ioc_timer_gettimeoffset, |
| 315 | }; |
| 316 | |
| 317 | static struct plat_serial8250_port serial_platform_data[] = { |
| 318 | { |
| 319 | .mapbase = 0x03010fe0, |
| 320 | .irq = 10, |
| 321 | .uartclk = 1843200, |
| 322 | .regshift = 2, |
| 323 | .iotype = UPIO_MEM, |
| 324 | .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST, |
| 325 | }, |
| 326 | { |
| 327 | .mapbase = 0x03010be0, |
| 328 | .irq = 0, |
| 329 | .uartclk = 1843200, |
| 330 | .regshift = 2, |
| 331 | .iotype = UPIO_MEM, |
| 332 | .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST, |
| 333 | }, |
| 334 | { |
| 335 | .iobase = ISASLOT_IO + 0x2e8, |
| 336 | .irq = 41, |
| 337 | .uartclk = 1843200, |
| 338 | .regshift = 0, |
| 339 | .iotype = UPIO_PORT, |
| 340 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, |
| 341 | }, |
| 342 | { |
| 343 | .iobase = ISASLOT_IO + 0x3e8, |
| 344 | .irq = 40, |
| 345 | .uartclk = 1843200, |
| 346 | .regshift = 0, |
| 347 | .iotype = UPIO_PORT, |
| 348 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, |
| 349 | }, |
| 350 | { }, |
| 351 | }; |
| 352 | |
| 353 | static struct platform_device serial_device = { |
| 354 | .name = "serial8250", |
| 355 | .id = 0, |
| 356 | .dev = { |
| 357 | .platform_data = serial_platform_data, |
| 358 | }, |
| 359 | }; |
| 360 | |
| 361 | static void __init clps7500_init(void) |
| 362 | { |
| 363 | platform_device_register(&serial_device); |
| 364 | } |
| 365 | |
| 366 | MACHINE_START(CLPS7500, "CL-PS7500") |
| 367 | MAINTAINER("Philip Blundell") |
| 368 | BOOT_MEM(0x10000000, 0x03000000, 0xe0000000) |
| 369 | MAPIO(clps7500_map_io) |
| 370 | INITIRQ(clps7500_init_irq) |
| 371 | .init_machine = clps7500_init, |
| 372 | .timer = &clps7500_timer, |
| 373 | MACHINE_END |
| 374 | |