arch/arm/mach-clps7500/core.c

   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/irq.h>
  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
  30 unsigned int vram_size;
  31
  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 irq_chip 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 irq_chip 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 irq_chip 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 irq_chip 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 irq_chip 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 irq_chip 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 irq_chip 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 = {
 197         .handler = no_action,
 198         .mask = CPU_MASK_NONE,
 199         .name = "isa",
 200 };
 201
 202 static void __init clps7500_init_irq(void)
 203 {
 204         unsigned int irq, flags;
 205
 206         iomd_writeb(0, IOMD_IRQMASKA);
 207         iomd_writeb(0, IOMD_IRQMASKB);
 208         iomd_writeb(0, IOMD_FIQMASK);
 209         iomd_writeb(0, IOMD_DMAMASK);
 210
 211         for (irq = 0; irq < NR_IRQS; irq++) {
 212                 flags = IRQF_VALID;
 213
 214                 if (irq <= 6 || (irq >= 9 && irq <= 15) ||
 215                     (irq >= 48 && irq <= 55))
 216                         flags |= IRQF_PROBE;
 217
 218                 switch (irq) {
 219                 case 0 ... 7:
 220                         set_irq_chip(irq, &clps7500_a_chip);
 221                         set_irq_handler(irq, handle_level_irq);
 222                         set_irq_flags(irq, flags);
 223                         break;
 224
 225                 case 8 ... 15:
 226                         set_irq_chip(irq, &clps7500_b_chip);
 227                         set_irq_handler(irq, handle_level_irq);
 228                         set_irq_flags(irq, flags);
 229                         break;
 230
 231                 case 16 ... 22:
 232                         set_irq_chip(irq, &clps7500_dma_chip);
 233                         set_irq_handler(irq, handle_level_irq);
 234                         set_irq_flags(irq, flags);
 235                         break;
 236
 237                 case 24 ... 31:
 238                         set_irq_chip(irq, &clps7500_c_chip);
 239                         set_irq_handler(irq, handle_level_irq);
 240                         set_irq_flags(irq, flags);
 241                         break;
 242
 243                 case 40 ... 47:
 244                         set_irq_chip(irq, &clps7500_d_chip);
 245                         set_irq_handler(irq, handle_level_irq);
 246                         set_irq_flags(irq, flags);
 247                         break;
 248
 249                 case 48 ... 55:
 250                         set_irq_chip(irq, &clps7500_no_chip);
 251                         set_irq_handler(irq, handle_level_irq);
 252                         set_irq_flags(irq, flags);
 253                         break;
 254
 255                 case 64 ... 72:
 256                         set_irq_chip(irq, &clps7500_fiq_chip);
 257                         set_irq_handler(irq, handle_level_irq);
 258                         set_irq_flags(irq, flags);
 259                         break;
 260                 }
 261         }
 262
 263         setup_irq(IRQ_ISA, &irq_isa);
 264 }
 265
 266 static struct map_desc cl7500_io_desc[] __initdata = {
 267         {       /* IO space     */
 268                 .virtual        = (unsigned long)IO_BASE,
 269                 .pfn            = __phys_to_pfn(IO_START),
 270                 .length         = IO_SIZE,
 271                 .type           = MT_DEVICE
 272         }, {    /* ISA space    */
 273                 .virtual        = ISA_BASE,
 274                 .pfn            = __phys_to_pfn(ISA_START),
 275                 .length         = ISA_SIZE,
 276                 .type           = MT_DEVICE
 277         }, {    /* Flash        */
 278                 .virtual        = FLASH_BASE,
 279                 .pfn            = __phys_to_pfn(FLASH_START),
 280                 .length         = FLASH_SIZE,
 281                 .type           = MT_DEVICE
 282         }, {    /* LED          */
 283                 .virtual        = LED_BASE,
 284                 .pfn            = __phys_to_pfn(LED_START),
 285                 .length         = LED_SIZE,
 286                 .type           = MT_DEVICE
 287         }
 288 };
 289
 290 static void __init clps7500_map_io(void)
 291 {
 292         iotable_init(cl7500_io_desc, ARRAY_SIZE(cl7500_io_desc));
 293 }
 294
 295 extern void ioctime_init(void);
 296 extern unsigned long ioc_timer_gettimeoffset(void);
 297
 298 static irqreturn_t
 299 clps7500_timer_interrupt(int irq, void *dev_id)
 300 {
 301         write_seqlock(&xtime_lock);
 302
 303         timer_tick();
 304
 305         /* Why not using do_leds interface?? */
 306         {
 307                 /* Twinkle the lights. */
 308                 static int count, state = 0xff00;
 309                 if (count-- == 0) {
 310                         state ^= 0x100;
 311                         count = 25;
 312                         *((volatile unsigned int *)LED_ADDRESS) = state;
 313                 }
 314         }
 315
 316         write_sequnlock(&xtime_lock);
 317
 318         return IRQ_HANDLED;
 319 }
 320
 321 static struct irqaction clps7500_timer_irq = {
 322         .name           = "CLPS7500 Timer Tick",
 323         .flags          = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
 324         .handler        = clps7500_timer_interrupt,
 325 };
 326
 327 /*
 328  * Set up timer interrupt.
 329  */
 330 static void __init clps7500_timer_init(void)
 331 {
 332         ioctime_init();
 333         setup_irq(IRQ_TIMER, &clps7500_timer_irq);
 334 }
 335
 336 static struct sys_timer clps7500_timer = {
 337         .init           = clps7500_timer_init,
 338         .offset         = ioc_timer_gettimeoffset,
 339 };
 340
 341 static struct plat_serial8250_port serial_platform_data[] = {
 342         {
 343                 .mapbase        = 0x03010fe0,
 344                 .irq            = 10,
 345                 .uartclk        = 1843200,
 346                 .regshift       = 2,
 347                 .iotype         = UPIO_MEM,
 348                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
 349         },
 350         {
 351                 .mapbase        = 0x03010be0,
 352                 .irq            = 0,
 353                 .uartclk        = 1843200,
 354                 .regshift       = 2,
 355                 .iotype         = UPIO_MEM,
 356                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
 357         },
 358         {
 359                 .iobase         = ISASLOT_IO + 0x2e8,
 360                 .irq            = 41,
 361                 .uartclk        = 1843200,
 362                 .regshift       = 0,
 363                 .iotype         = UPIO_PORT,
 364                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 365         },
 366         {
 367                 .iobase         = ISASLOT_IO + 0x3e8,
 368                 .irq            = 40,
 369                 .uartclk        = 1843200,
 370                 .regshift       = 0,
 371                 .iotype         = UPIO_PORT,
 372                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 373         },
 374         { },
 375 };
 376
 377 static struct platform_device serial_device = {
 378         .name                   = "serial8250",
 379         .id                     = PLAT8250_DEV_PLATFORM,
 380         .dev                    = {
 381                 .platform_data  = serial_platform_data,
 382         },
 383 };
 384
 385 static void __init clps7500_init(void)
 386 {
 387         platform_device_register(&serial_device);
 388 }
 389
 390 MACHINE_START(CLPS7500, "CL-PS7500")
 391         /* Maintainer: Philip Blundell */
 392         .phys_io        = 0x03000000,
 393         .io_pg_offst    = ((0xe0000000) >> 18) & 0xfffc,
 394         .map_io         = clps7500_map_io,
 395         .init_irq       = clps7500_init_irq,
 396         .init_machine   = clps7500_init,
 397         .timer          = &clps7500_timer,
 398 MACHINE_END
 399