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/gpio/machine.h>
  14 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/delay.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/pm.h>
  20 #include <linux/cpufreq.h>
  21 #include <linux/ioport.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/reboot.h>
  24 #include <linux/regulator/fixed.h>
  25 #include <linux/regulator/machine.h>
  26 #include <linux/irqchip/irq-sa11x0.h>
  27
  28 #include <video/sa1100fb.h>
  29
  30 #include <soc/sa1100/pwer.h>
  31
  32 #include <asm/div64.h>
  33 #include <asm/mach/map.h>
  34 #include <asm/mach/flash.h>
  35 #include <asm/irq.h>
  36 #include <asm/system_misc.h>
  37
  38 #include <mach/hardware.h>
  39 #include <mach/irqs.h>
  40 #include <mach/reset.h>
  41
  42 #include "generic.h"
  43 #include <clocksource/pxa.h>
  44
  45 unsigned int reset_status;
  46 EXPORT_SYMBOL(reset_status);
  47
  48 #define NR_FREQS        16
  49
  50 /*
  51  * This table is setup for a 3.6864MHz Crystal.
  52  */
  53 struct cpufreq_frequency_table sa11x0_freq_table[NR_FREQS+1] = {
  54         { .frequency = 59000,   /*  59.0 MHz */},
  55         { .frequency = 73700,   /*  73.7 MHz */},
  56         { .frequency = 88500,   /*  88.5 MHz */},
  57         { .frequency = 103200,  /* 103.2 MHz */},
  58         { .frequency = 118000,  /* 118.0 MHz */},
  59         { .frequency = 132700,  /* 132.7 MHz */},
  60         { .frequency = 147500,  /* 147.5 MHz */},
  61         { .frequency = 162200,  /* 162.2 MHz */},
  62         { .frequency = 176900,  /* 176.9 MHz */},
  63         { .frequency = 191700,  /* 191.7 MHz */},
  64         { .frequency = 206400,  /* 206.4 MHz */},
  65         { .frequency = 221200,  /* 221.2 MHz */},
  66         { .frequency = 235900,  /* 235.9 MHz */},
  67         { .frequency = 250700,  /* 250.7 MHz */},
  68         { .frequency = 265400,  /* 265.4 MHz */},
  69         { .frequency = 280200,  /* 280.2 MHz */},
  70         { .frequency = CPUFREQ_TABLE_END, },
  71 };
  72
  73 unsigned int sa11x0_getspeed(unsigned int cpu)
  74 {
  75         if (cpu)
  76                 return 0;
  77         return sa11x0_freq_table[PPCR & 0xf].frequency;
  78 }
  79
  80 /*
  81  * Default power-off for SA1100
  82  */
  83 static void sa1100_power_off(void)
  84 {
  85         mdelay(100);
  86         local_irq_disable();
  87         /* disable internal oscillator, float CS lines */
  88         PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);
  89         /* enable wake-up on GPIO0 (Assabet...) */
  90         PWER = GFER = GRER = 1;
  91         /*
  92          * set scratchpad to zero, just in case it is used as a
  93          * restart address by the bootloader.
  94          */
  95         PSPR = 0;
  96         /* enter sleep mode */
  97         PMCR = PMCR_SF;
  98 }
  99
 100 void sa11x0_restart(enum reboot_mode mode, const char *cmd)
 101 {
 102         clear_reset_status(RESET_STATUS_ALL);
 103
 104         if (mode == REBOOT_SOFT) {
 105                 /* Jump into ROM at address 0 */
 106                 soft_restart(0);
 107         } else {
 108                 /* Use on-chip reset capability */
 109                 RSRR = RSRR_SWR;
 110         }
 111 }
 112
 113 static void sa11x0_register_device(struct platform_device *dev, void *data)
 114 {
 115         int err;
 116         dev->dev.platform_data = data;
 117         err = platform_device_register(dev);
 118         if (err)
 119                 printk(KERN_ERR "Unable to register device %s: %d\n",
 120                         dev->name, err);
 121 }
 122
 123
 124 static struct resource sa11x0udc_resources[] = {
 125         [0] = DEFINE_RES_MEM(__PREG(Ser0UDCCR), SZ_64K),
 126         [1] = DEFINE_RES_IRQ(IRQ_Ser0UDC),
 127 };
 128
 129 static u64 sa11x0udc_dma_mask = 0xffffffffUL;
 130
 131 static struct platform_device sa11x0udc_device = {
 132         .name           = "sa11x0-udc",
 133         .id             = -1,
 134         .dev            = {
 135                 .dma_mask = &sa11x0udc_dma_mask,
 136                 .coherent_dma_mask = 0xffffffff,
 137         },
 138         .num_resources  = ARRAY_SIZE(sa11x0udc_resources),
 139         .resource       = sa11x0udc_resources,
 140 };
 141
 142 static struct resource sa11x0uart1_resources[] = {
 143         [0] = DEFINE_RES_MEM(__PREG(Ser1UTCR0), SZ_64K),
 144         [1] = DEFINE_RES_IRQ(IRQ_Ser1UART),
 145 };
 146
 147 static struct platform_device sa11x0uart1_device = {
 148         .name           = "sa11x0-uart",
 149         .id             = 1,
 150         .num_resources  = ARRAY_SIZE(sa11x0uart1_resources),
 151         .resource       = sa11x0uart1_resources,
 152 };
 153
 154 static struct resource sa11x0uart3_resources[] = {
 155         [0] = DEFINE_RES_MEM(__PREG(Ser3UTCR0), SZ_64K),
 156         [1] = DEFINE_RES_IRQ(IRQ_Ser3UART),
 157 };
 158
 159 static struct platform_device sa11x0uart3_device = {
 160         .name           = "sa11x0-uart",
 161         .id             = 3,
 162         .num_resources  = ARRAY_SIZE(sa11x0uart3_resources),
 163         .resource       = sa11x0uart3_resources,
 164 };
 165
 166 static struct resource sa11x0mcp_resources[] = {
 167         [0] = DEFINE_RES_MEM(__PREG(Ser4MCCR0), SZ_64K),
 168         [1] = DEFINE_RES_MEM(__PREG(Ser4MCCR1), 4),
 169         [2] = DEFINE_RES_IRQ(IRQ_Ser4MCP),
 170 };
 171
 172 static u64 sa11x0mcp_dma_mask = 0xffffffffUL;
 173
 174 static struct platform_device sa11x0mcp_device = {
 175         .name           = "sa11x0-mcp",
 176         .id             = -1,
 177         .dev = {
 178                 .dma_mask = &sa11x0mcp_dma_mask,
 179                 .coherent_dma_mask = 0xffffffff,
 180         },
 181         .num_resources  = ARRAY_SIZE(sa11x0mcp_resources),
 182         .resource       = sa11x0mcp_resources,
 183 };
 184
 185 void __init sa11x0_ppc_configure_mcp(void)
 186 {
 187         /* Setup the PPC unit for the MCP */
 188         PPDR &= ~PPC_RXD4;
 189         PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
 190         PSDR |= PPC_RXD4;
 191         PSDR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
 192         PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);
 193 }
 194
 195 void sa11x0_register_mcp(struct mcp_plat_data *data)
 196 {
 197         sa11x0_register_device(&sa11x0mcp_device, data);
 198 }
 199
 200 static struct resource sa11x0ssp_resources[] = {
 201         [0] = DEFINE_RES_MEM(0x80070000, SZ_64K),
 202         [1] = DEFINE_RES_IRQ(IRQ_Ser4SSP),
 203 };
 204
 205 static u64 sa11x0ssp_dma_mask = 0xffffffffUL;
 206
 207 static struct platform_device sa11x0ssp_device = {
 208         .name           = "sa11x0-ssp",
 209         .id             = -1,
 210         .dev = {
 211                 .dma_mask = &sa11x0ssp_dma_mask,
 212                 .coherent_dma_mask = 0xffffffff,
 213         },
 214         .num_resources  = ARRAY_SIZE(sa11x0ssp_resources),
 215         .resource       = sa11x0ssp_resources,
 216 };
 217
 218 static struct resource sa11x0fb_resources[] = {
 219         [0] = DEFINE_RES_MEM(0xb0100000, SZ_64K),
 220         [1] = DEFINE_RES_IRQ(IRQ_LCD),
 221 };
 222
 223 static struct platform_device sa11x0fb_device = {
 224         .name           = "sa11x0-fb",
 225         .id             = -1,
 226         .dev = {
 227                 .coherent_dma_mask = 0xffffffff,
 228         },
 229         .num_resources  = ARRAY_SIZE(sa11x0fb_resources),
 230         .resource       = sa11x0fb_resources,
 231 };
 232
 233 void sa11x0_register_lcd(struct sa1100fb_mach_info *inf)
 234 {
 235         sa11x0_register_device(&sa11x0fb_device, inf);
 236 }
 237
 238 static bool sa11x0pcmcia_legacy = true;
 239 static struct platform_device sa11x0pcmcia_device = {
 240         .name           = "sa11x0-pcmcia",
 241         .id             = -1,
 242 };
 243
 244 void sa11x0_register_pcmcia(int socket, struct gpiod_lookup_table *table)
 245 {
 246         if (table)
 247                 gpiod_add_lookup_table(table);
 248         platform_device_register_simple("sa11x0-pcmcia", socket, NULL, 0);
 249         sa11x0pcmcia_legacy = false;
 250 }
 251
 252 static struct platform_device sa11x0mtd_device = {
 253         .name           = "sa1100-mtd",
 254         .id             = -1,
 255 };
 256
 257 void sa11x0_register_mtd(struct flash_platform_data *flash,
 258                          struct resource *res, int nr)
 259 {
 260         flash->name = "sa1100";
 261         sa11x0mtd_device.resource = res;
 262         sa11x0mtd_device.num_resources = nr;
 263         sa11x0_register_device(&sa11x0mtd_device, flash);
 264 }
 265
 266 static struct resource sa11x0ir_resources[] = {
 267         DEFINE_RES_MEM(__PREG(Ser2UTCR0), 0x24),
 268         DEFINE_RES_MEM(__PREG(Ser2HSCR0), 0x1c),
 269         DEFINE_RES_MEM(__PREG(Ser2HSCR2), 0x04),
 270         DEFINE_RES_IRQ(IRQ_Ser2ICP),
 271 };
 272
 273 static struct platform_device sa11x0ir_device = {
 274         .name           = "sa11x0-ir",
 275         .id             = -1,
 276         .num_resources  = ARRAY_SIZE(sa11x0ir_resources),
 277         .resource       = sa11x0ir_resources,
 278 };
 279
 280 void sa11x0_register_irda(struct irda_platform_data *irda)
 281 {
 282         sa11x0_register_device(&sa11x0ir_device, irda);
 283 }
 284
 285 static struct resource sa1100_rtc_resources[] = {
 286         DEFINE_RES_MEM(0x90010000, 0x40),
 287         DEFINE_RES_IRQ_NAMED(IRQ_RTC1Hz, "rtc 1Hz"),
 288         DEFINE_RES_IRQ_NAMED(IRQ_RTCAlrm, "rtc alarm"),
 289 };
 290
 291 static struct platform_device sa11x0rtc_device = {
 292         .name           = "sa1100-rtc",
 293         .id             = -1,
 294         .num_resources  = ARRAY_SIZE(sa1100_rtc_resources),
 295         .resource       = sa1100_rtc_resources,
 296 };
 297
 298 static struct resource sa11x0dma_resources[] = {
 299         DEFINE_RES_MEM(DMA_PHYS, DMA_SIZE),
 300         DEFINE_RES_IRQ(IRQ_DMA0),
 301         DEFINE_RES_IRQ(IRQ_DMA1),
 302         DEFINE_RES_IRQ(IRQ_DMA2),
 303         DEFINE_RES_IRQ(IRQ_DMA3),
 304         DEFINE_RES_IRQ(IRQ_DMA4),
 305         DEFINE_RES_IRQ(IRQ_DMA5),
 306 };
 307
 308 static u64 sa11x0dma_dma_mask = DMA_BIT_MASK(32);
 309
 310 static struct platform_device sa11x0dma_device = {
 311         .name           = "sa11x0-dma",
 312         .id             = -1,
 313         .dev = {
 314                 .dma_mask = &sa11x0dma_dma_mask,
 315                 .coherent_dma_mask = 0xffffffff,
 316         },
 317         .num_resources  = ARRAY_SIZE(sa11x0dma_resources),
 318         .resource       = sa11x0dma_resources,
 319 };
 320
 321 static struct platform_device *sa11x0_devices[] __initdata = {
 322         &sa11x0udc_device,
 323         &sa11x0uart1_device,
 324         &sa11x0uart3_device,
 325         &sa11x0ssp_device,
 326         &sa11x0rtc_device,
 327         &sa11x0dma_device,
 328 };
 329
 330 static int __init sa1100_init(void)
 331 {
 332         pm_power_off = sa1100_power_off;
 333
 334         if (sa11x0pcmcia_legacy)
 335                 platform_device_register(&sa11x0pcmcia_device);
 336
 337         regulator_has_full_constraints();
 338
 339         return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices));
 340 }
 341
 342 arch_initcall(sa1100_init);
 343
 344 void __init sa11x0_init_late(void)
 345 {
 346         sa11x0_pm_init();
 347 }
 348
 349 int __init sa11x0_register_fixed_regulator(int n,
 350         struct fixed_voltage_config *cfg,
 351         struct regulator_consumer_supply *supplies, unsigned num_supplies,
 352         bool uses_gpio)
 353 {
 354         struct regulator_init_data *id;
 355
 356         cfg->init_data = id = kzalloc(sizeof(*cfg->init_data), GFP_KERNEL);
 357         if (!cfg->init_data)
 358                 return -ENOMEM;
 359
 360         if (!uses_gpio)
 361                 id->constraints.always_on = 1;
 362         id->constraints.name = cfg->supply_name;
 363         id->constraints.min_uV = cfg->microvolts;
 364         id->constraints.max_uV = cfg->microvolts;
 365         id->constraints.valid_modes_mask = REGULATOR_MODE_NORMAL;
 366         id->constraints.valid_ops_mask = REGULATOR_CHANGE_STATUS;
 367         id->consumer_supplies = supplies;
 368         id->num_consumer_supplies = num_supplies;
 369
 370         platform_device_register_resndata(NULL, "reg-fixed-voltage", n,
 371                                           NULL, 0, cfg, sizeof(*cfg));
 372         return 0;
 373 }
 374
 375 /*
 376  * Common I/O mapping:
 377  *
 378  * Typically, static virtual address mappings are as follow:
 379  *
 380  * 0xf0000000-0xf3ffffff:       miscellaneous stuff (CPLDs, etc.)
 381  * 0xf4000000-0xf4ffffff:       SA-1111
 382  * 0xf5000000-0xf5ffffff:       reserved (used by cache flushing area)
 383  * 0xf6000000-0xfffeffff:       reserved (internal SA1100 IO defined above)
 384  * 0xffff0000-0xffff0fff:       SA1100 exception vectors
 385  * 0xffff2000-0xffff2fff:       Minicache copy_user_page area
 386  *
 387  * Below 0xe8000000 is reserved for vm allocation.
 388  *
 389  * The machine specific code must provide the extra mapping beside the
 390  * default mapping provided here.
 391  */
 392
 393 static struct map_desc standard_io_desc[] __initdata = {
 394         {       /* PCM */
 395                 .virtual        =  0xf8000000,
 396                 .pfn            = __phys_to_pfn(0x80000000),
 397                 .length         = 0x00100000,
 398                 .type           = MT_DEVICE
 399         }, {    /* SCM */
 400                 .virtual        =  0xfa000000,
 401                 .pfn            = __phys_to_pfn(0x90000000),
 402                 .length         = 0x00100000,
 403                 .type           = MT_DEVICE
 404         }, {    /* MER */
 405                 .virtual        =  0xfc000000,
 406                 .pfn            = __phys_to_pfn(0xa0000000),
 407                 .length         = 0x00100000,
 408                 .type           = MT_DEVICE
 409         }, {    /* LCD + DMA */
 410                 .virtual        =  0xfe000000,
 411                 .pfn            = __phys_to_pfn(0xb0000000),
 412                 .length         = 0x00200000,
 413                 .type           = MT_DEVICE
 414         },
 415 };
 416
 417 void __init sa1100_map_io(void)
 418 {
 419         iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
 420 }
 421
 422 void __init sa1100_timer_init(void)
 423 {
 424         pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x90000000));
 425 }
 426
 427 static struct resource irq_resource =
 428         DEFINE_RES_MEM_NAMED(0x90050000, SZ_64K, "irqs");
 429
 430 void __init sa1100_init_irq(void)
 431 {
 432         request_resource(&iomem_resource, &irq_resource);
 433
 434         sa11x0_init_irq_nodt(IRQ_GPIO0_SC, irq_resource.start);
 435
 436         sa1100_init_gpio();
 437         sa11xx_clk_init();
 438 }
 439
 440 /*
 441  * Disable the memory bus request/grant signals on the SA1110 to
 442  * ensure that we don't receive spurious memory requests.  We set
 443  * the MBGNT signal false to ensure the SA1111 doesn't own the
 444  * SDRAM bus.
 445  */
 446 void sa1110_mb_disable(void)
 447 {
 448         unsigned long flags;
 449
 450         local_irq_save(flags);
 451
 452         PGSR &= ~GPIO_MBGNT;
 453         GPCR = GPIO_MBGNT;
 454         GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
 455
 456         GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ);
 457
 458         local_irq_restore(flags);
 459 }
 460
 461 /*
 462  * If the system is going to use the SA-1111 DMA engines, set up
 463  * the memory bus request/grant pins.
 464  */
 465 void sa1110_mb_enable(void)
 466 {
 467         unsigned long flags;
 468
 469         local_irq_save(flags);
 470
 471         PGSR &= ~GPIO_MBGNT;
 472         GPCR = GPIO_MBGNT;
 473         GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;
 474
 475         GAFR |= (GPIO_MBGNT | GPIO_MBREQ);
 476         TUCR |= TUCR_MR;
 477
 478         local_irq_restore(flags);
 479 }
 480
 481 int sa11x0_gpio_set_wake(unsigned int gpio, unsigned int on)
 482 {
 483         if (on)
 484                 PWER |= BIT(gpio);
 485         else
 486                 PWER &= ~BIT(gpio);
 487
 488         return 0;
 489 }
 490
 491 int sa11x0_sc_set_wake(unsigned int irq, unsigned int on)
 492 {
 493         if (BIT(irq) != IC_RTCAlrm)
 494                 return -EINVAL;
 495
 496         if (on)
 497                 PWER |= PWER_RTC;
 498         else
 499                 PWER &= ~PWER_RTC;
 500
 501         return 0;
 502 }