kernel/arch/arm/mach-sa1100/generic.c

   1 /*
   2  * linux/arch/arm/mach-sa1100/generic.c
   3  *
   4  * Author: Nicolas Pitre
   5  *
   6  * Code common to all SA11x0 machines.
   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/gpio.h>
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/delay.h>
  17 #include <linux/dma-mapping.h>
  18 #include <linux/pm.h>
  19 #include <linux/cpufreq.h>
  20 #include <linux/ioport.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/reboot.h>
  23 #include <linux/irqchip/irq-sa11x0.h>
  24
  25 #include <video/sa1100fb.h>
  26
  27 #include <soc/sa1100/pwer.h>
  28
  29 #include <asm/div64.h>
  30 #include <asm/mach/map.h>
  31 #include <asm/mach/flash.h>
  32 #include <asm/irq.h>
  33 #include <asm/system_misc.h>
  34
  35 #include <mach/hardware.h>
  36 #include <mach/irqs.h>
  37
  38 #include "generic.h"
  39 #include <clocksource/pxa.h>
  40
  41 unsigned int reset_status;
  42 EXPORT_SYMBOL(reset_status);
  43
  44 #define NR_FREQS        16
  45
  46 /*
  47  * This table is setup for a 3.6864MHz Crystal.
  48  */
  49 struct cpufreq_frequency_table sa11x0_freq_table[NR_FREQS+1] = {
  50         { .frequency = 59000,   /*  59.0 MHz */},
  51         { .frequency = 73700,   /*  73.7 MHz */},
  52         { .frequency = 88500,   /*  88.5 MHz */},
  53         { .frequency = 103200,  /* 103.2 MHz */},
  54         { .frequency = 118000,  /* 118.0 MHz */},
  55         { .frequency = 132700,  /* 132.7 MHz */},
  56         { .frequency = 147500,  /* 147.5 MHz */},
  57         { .frequency = 162200,  /* 162.2 MHz */},
  58         { .frequency = 176900,  /* 176.9 MHz */},
  59         { .frequency = 191700,  /* 191.7 MHz */},
  60         { .frequency = 206400,  /* 206.4 MHz */},
  61         { .frequency = 221200,  /* 221.2 MHz */},
  62         { .frequency = 235900,  /* 235.9 MHz */},
  63         { .frequency = 250700,  /* 250.7 MHz */},
  64         { .frequency = 265400,  /* 265.4 MHz */},
  65         { .frequency = 280200,  /* 280.2 MHz */},
  66         { .frequency = CPUFREQ_TABLE_END, },
  67 };
  68
  69 unsigned int sa11x0_getspeed(unsigned int cpu)
  70 {
  71         if (cpu)
  72                 return 0;
  73         return sa11x0_freq_table[PPCR & 0xf].frequency;
  74 }
  75
  76 /*
  77  * Default power-off for SA1100
  78  */
  79 static void sa1100_power_off(void)
  80 {
  81         mdelay(100);
  82         local_irq_disable();
  83         /* disable internal oscillator, float CS lines */
  84         PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
  85         /* enable wake-up on GPIO0 (Assabet...) */
  86         PWER = GFER = GRER = 1;
  87         /*
  88          * set scratchpad to zero, just in case it is used as a
  89          * restart address by the bootloader.
  90          */
  91         PSPR = 0;
  92         /* enter sleep mode */
  93         PMCR = PMCR_SF;
  94 }
  95
  96 void sa11x0_restart(enum reboot_mode mode, const char *cmd)
  97 {
  98         if (mode == REBOOT_SOFT) {
  99                 /* Jump into ROM at address 0 */
 100                 soft_restart(0);
 101         } else {
 102                 /* Use on-chip reset capability */
 103                 RSRR = RSRR_SWR;
 104         }
 105 }
 106
 107 static void sa11x0_register_device(struct platform_device *dev, void *data)
 108 {
 109         int err;
 110         dev->dev.platform_data = data;
 111         err = platform_device_register(dev);
 112         if (err)
 113                 printk(KERN_ERR "Unable to register device %s: %d\n",
 114                         dev->name, err);
 115 }
 116
 117
 118 static struct resource sa11x0udc_resources[] = {
 119         [0] = DEFINE_RES_MEM(__PREG(Ser0UDCCR), SZ_64K),
 120         [1] = DEFINE_RES_IRQ(IRQ_Ser0UDC),
 121 };
 122
 123 static u64 sa11x0udc_dma_mask = 0xffffffffUL;
 124
 125 static struct platform_device sa11x0udc_device = {
 126         .name           = "sa11x0-udc",
 127         .id             = -1,
 128         .dev            = {
 129                 .dma_mask = &sa11x0udc_dma_mask,
 130                 .coherent_dma_mask = 0xffffffff,
 131         },
 132         .num_resources  = ARRAY_SIZE(sa11x0udc_resources),
 133         .resource       = sa11x0udc_resources,
 134 };
 135
 136 static struct resource sa11x0uart1_resources[] = {
 137         [0] = DEFINE_RES_MEM(__PREG(Ser1UTCR0), SZ_64K),
 138         [1] = DEFINE_RES_IRQ(IRQ_Ser1UART),
 139 };
 140
 141 static struct platform_device sa11x0uart1_device = {
 142         .name           = "sa11x0-uart",
 143         .id             = 1,
 144         .num_resources  = ARRAY_SIZE(sa11x0uart1_resources),
 145         .resource       = sa11x0uart1_resources,
 146 };
 147
 148 static struct resource sa11x0uart3_resources[] = {
 149         [0] = DEFINE_RES_MEM(__PREG(Ser3UTCR0), SZ_64K),
 150         [1] = DEFINE_RES_IRQ(IRQ_Ser3UART),
 151 };
 152
 153 static struct platform_device sa11x0uart3_device = {
 154         .name           = "sa11x0-uart",
 155         .id             = 3,
 156         .num_resources  = ARRAY_SIZE(sa11x0uart3_resources),
 157         .resource       = sa11x0uart3_resources,
 158 };
 159
 160 static struct resource sa11x0mcp_resources[] = {
 161         [0] = DEFINE_RES_MEM(__PREG(Ser4MCCR0), SZ_64K),
 162         [1] = DEFINE_RES_MEM(__PREG(Ser4MCCR1), 4),
 163         [2] = DEFINE_RES_IRQ(IRQ_Ser4MCP),
 164 };
 165
 166 static u64 sa11x0mcp_dma_mask = 0xffffffffUL;
 167
 168 static struct platform_device sa11x0mcp_device = {
 169         .name           = "sa11x0-mcp",
 170         .id             = -1,
 171         .dev = {
 172                 .dma_mask = &sa11x0mcp_dma_mask,
 173                 .coherent_dma_mask = 0xffffffff,
 174         },
 175         .num_resources  = ARRAY_SIZE(sa11x0mcp_resources),
 176         .resource       = sa11x0mcp_resources,
 177 };
 178
 179 void __init sa11x0_ppc_configure_mcp(void)
 180 {
 181         /* Setup the PPC unit for the MCP */
 182         PPDR &= ~PPC_RXD4;
 183         PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
 184         PSDR |= PPC_RXD4;
 185         PSDR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
 186         PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
 187 }
 188
 189 void sa11x0_register_mcp(struct mcp_plat_data *data)
 190 {
 191         sa11x0_register_device(&sa11x0mcp_device, data);
 192 }
 193
 194 static struct resource sa11x0ssp_resources[] = {
 195         [0] = DEFINE_RES_MEM(0x80070000, SZ_64K),
 196         [1] = DEFINE_RES_IRQ(IRQ_Ser4SSP),
 197 };
 198
 199 static u64 sa11x0ssp_dma_mask = 0xffffffffUL;
 200
 201 static struct platform_device sa11x0ssp_device = {
 202         .name           = "sa11x0-ssp",
 203         .id             = -1,
 204         .dev = {
 205                 .dma_mask = &sa11x0ssp_dma_mask,
 206                 .coherent_dma_mask = 0xffffffff,
 207         },
 208         .num_resources  = ARRAY_SIZE(sa11x0ssp_resources),
 209         .resource       = sa11x0ssp_resources,
 210 };
 211
 212 static struct resource sa11x0fb_resources[] = {
 213         [0] = DEFINE_RES_MEM(0xb0100000, SZ_64K),
 214         [1] = DEFINE_RES_IRQ(IRQ_LCD),
 215 };
 216
 217 static struct platform_device sa11x0fb_device = {
 218         .name           = "sa11x0-fb",
 219         .id             = -1,
 220         .dev = {
 221                 .coherent_dma_mask = 0xffffffff,
 222         },
 223         .num_resources  = ARRAY_SIZE(sa11x0fb_resources),
 224         .resource       = sa11x0fb_resources,
 225 };
 226
 227 void sa11x0_register_lcd(struct sa1100fb_mach_info *inf)
 228 {
 229         sa11x0_register_device(&sa11x0fb_device, inf);
 230 }
 231
 232 static struct platform_device sa11x0pcmcia_device = {
 233         .name           = "sa11x0-pcmcia",
 234         .id             = -1,
 235 };
 236
 237 static struct platform_device sa11x0mtd_device = {
 238         .name           = "sa1100-mtd",
 239         .id             = -1,
 240 };
 241
 242 void sa11x0_register_mtd(struct flash_platform_data *flash,
 243                          struct resource *res, int nr)
 244 {
 245         flash->name = "sa1100";
 246         sa11x0mtd_device.resource = res;
 247         sa11x0mtd_device.num_resources = nr;
 248         sa11x0_register_device(&sa11x0mtd_device, flash);
 249 }
 250
 251 static struct resource sa11x0ir_resources[] = {
 252         DEFINE_RES_MEM(__PREG(Ser2UTCR0), 0x24),
 253         DEFINE_RES_MEM(__PREG(Ser2HSCR0), 0x1c),
 254         DEFINE_RES_MEM(__PREG(Ser2HSCR2), 0x04),
 255         DEFINE_RES_IRQ(IRQ_Ser2ICP),
 256 };
 257
 258 static struct platform_device sa11x0ir_device = {
 259         .name           = "sa11x0-ir",
 260         .id             = -1,
 261         .num_resources  = ARRAY_SIZE(sa11x0ir_resources),
 262         .resource       = sa11x0ir_resources,
 263 };
 264
 265 void sa11x0_register_irda(struct irda_platform_data *irda)
 266 {
 267         sa11x0_register_device(&sa11x0ir_device, irda);
 268 }
 269
 270 static struct resource sa1100_rtc_resources[] = {
 271         DEFINE_RES_MEM(0x90010000, 0x40),
 272         DEFINE_RES_IRQ_NAMED(IRQ_RTC1Hz, "rtc 1Hz"),
 273         DEFINE_RES_IRQ_NAMED(IRQ_RTCAlrm, "rtc alarm"),
 274 };
 275
 276 static struct platform_device sa11x0rtc_device = {
 277         .name           = "sa1100-rtc",
 278         .id             = -1,
 279         .num_resources  = ARRAY_SIZE(sa1100_rtc_resources),
 280         .resource       = sa1100_rtc_resources,
 281 };
 282
 283 static struct resource sa11x0dma_resources[] = {
 284         DEFINE_RES_MEM(DMA_PHYS, DMA_SIZE),
 285         DEFINE_RES_IRQ(IRQ_DMA0),
 286         DEFINE_RES_IRQ(IRQ_DMA1),
 287         DEFINE_RES_IRQ(IRQ_DMA2),
 288         DEFINE_RES_IRQ(IRQ_DMA3),
 289         DEFINE_RES_IRQ(IRQ_DMA4),
 290         DEFINE_RES_IRQ(IRQ_DMA5),
 291 };
 292
 293 static u64 sa11x0dma_dma_mask = DMA_BIT_MASK(32);
 294
 295 static struct platform_device sa11x0dma_device = {
 296         .name           = "sa11x0-dma",
 297         .id             = -1,
 298         .dev = {
 299                 .dma_mask = &sa11x0dma_dma_mask,
 300                 .coherent_dma_mask = 0xffffffff,
 301         },
 302         .num_resources  = ARRAY_SIZE(sa11x0dma_resources),
 303         .resource       = sa11x0dma_resources,
 304 };
 305
 306 static struct platform_device *sa11x0_devices[] __initdata = {
 307         &sa11x0udc_device,
 308         &sa11x0uart1_device,
 309         &sa11x0uart3_device,
 310         &sa11x0ssp_device,
 311         &sa11x0pcmcia_device,
 312         &sa11x0rtc_device,
 313         &sa11x0dma_device,
 314 };
 315
 316 static int __init sa1100_init(void)
 317 {
 318         pm_power_off = sa1100_power_off;
 319         return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices));
 320 }
 321
 322 arch_initcall(sa1100_init);
 323
 324 void __init sa11x0_init_late(void)
 325 {
 326         sa11x0_pm_init();
 327 }
 328
 329 /*
 330  * Common I/O mapping:
 331  *
 332  * Typically, static virtual address mappings are as follow:
 333  *
 334  * 0xf0000000-0xf3ffffff:       miscellaneous stuff (CPLDs, etc.)
 335  * 0xf4000000-0xf4ffffff:       SA-1111
 336  * 0xf5000000-0xf5ffffff:       reserved (used by cache flushing area)
 337  * 0xf6000000-0xfffeffff:       reserved (internal SA1100 IO defined above)
 338  * 0xffff0000-0xffff0fff:       SA1100 exception vectors
 339  * 0xffff2000-0xffff2fff:       Minicache copy_user_page area
 340  *
 341  * Below 0xe8000000 is reserved for vm allocation.
 342  *
 343  * The machine specific code must provide the extra mapping beside the
 344  * default mapping provided here.
 345  */
 346
 347 static struct map_desc standard_io_desc[] __initdata = {
 348         {       /* PCM */
 349                 .virtual        =  0xf8000000,
 350                 .pfn            = __phys_to_pfn(0x80000000),
 351                 .length         = 0x00100000,
 352                 .type           = MT_DEVICE
 353         }, {    /* SCM */
 354                 .virtual        =  0xfa000000,
 355                 .pfn            = __phys_to_pfn(0x90000000),
 356                 .length         = 0x00100000,
 357                 .type           = MT_DEVICE
 358         }, {    /* MER */
 359                 .virtual        =  0xfc000000,
 360                 .pfn            = __phys_to_pfn(0xa0000000),
 361                 .length         = 0x00100000,
 362                 .type           = MT_DEVICE
 363         }, {    /* LCD + DMA */
 364                 .virtual        =  0xfe000000,
 365                 .pfn            = __phys_to_pfn(0xb0000000),
 366                 .length         = 0x00200000,
 367                 .type           = MT_DEVICE
 368         },
 369 };
 370
 371 void __init sa1100_map_io(void)
 372 {
 373         iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
 374 }
 375
 376 void __init sa1100_timer_init(void)
 377 {
 378         pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x90000000), 3686400);
 379 }
 380
 381 static struct resource irq_resource =
 382         DEFINE_RES_MEM_NAMED(0x90050000, SZ_64K, "irqs");
 383
 384 void __init sa1100_init_irq(void)
 385 {
 386         request_resource(&iomem_resource, &irq_resource);
 387
 388         sa11x0_init_irq_nodt(IRQ_GPIO0_SC, irq_resource.start);
 389
 390         sa1100_init_gpio();
 391 }
 392
 393 /*
 394  * Disable the memory bus request/grant signals on the SA1110 to
 395  * ensure that we don't receive spurious memory requests.  We set
 396  * the MBGNT signal false to ensure the SA1111 doesn't own the
 397  * SDRAM bus.
 398  */
 399 void sa1110_mb_disable(void)
 400 {
 401         unsigned long flags;
 402
 403         local_irq_save(flags);
 404
 405         PGSR &= ~GPIO_MBGNT;
 406         GPCR = GPIO_MBGNT;
 407         GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
 408
 409         GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ);
 410
 411         local_irq_restore(flags);
 412 }
 413
 414 /*
 415  * If the system is going to use the SA-1111 DMA engines, set up
 416  * the memory bus request/grant pins.
 417  */
 418 void sa1110_mb_enable(void)
 419 {
 420         unsigned long flags;
 421
 422         local_irq_save(flags);
 423
 424         PGSR &= ~GPIO_MBGNT;
 425         GPCR = GPIO_MBGNT;
 426         GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
 427
 428         GAFR |= (GPIO_MBGNT | GPIO_MBREQ);
 429         TUCR |= TUCR_MR;
 430
 431         local_irq_restore(flags);
 432 }
 433
 434 int sa11x0_gpio_set_wake(unsigned int gpio, unsigned int on)
 435 {
 436         if (on)
 437                 PWER |= BIT(gpio);
 438         else
 439                 PWER &= ~BIT(gpio);
 440
 441         return 0;
 442 }
 443
 444 int sa11x0_sc_set_wake(unsigned int irq, unsigned int on)
 445 {
 446         if (BIT(irq) != IC_RTCAlrm)
 447                 return -EINVAL;
 448
 449         if (on)
 450                 PWER |= PWER_RTC;
 451         else
 452                 PWER &= ~PWER_RTC;
 453
 454         return 0;
 455 }