arch/arm/mach-pxa/generic.c

   1 /*
   2  *  linux/arch/arm/mach-pxa/generic.c
   3  *
   4  *  Author:     Nicolas Pitre
   5  *  Created:    Jun 15, 2001
   6  *  Copyright:  MontaVista Software Inc.
   7  *
   8  * Code common to all PXA machines.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  * Since this file should be linked before any other machine specific file,
  15  * the __initcall() here will be executed first.  This serves as default
  16  * initialization stuff for PXA machines which can be overridden later if
  17  * need be.
  18  */
  19 #include <linux/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/init.h>
  22 #include <linux/delay.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/ioport.h>
  25 #include <linux/pm.h>
  26 #include <linux/string.h>
  27
  28 #include <asm/hardware.h>
  29 #include <asm/irq.h>
  30 #include <asm/system.h>
  31 #include <asm/pgtable.h>
  32 #include <asm/mach/map.h>
  33
  34 #include <asm/arch/pxa-regs.h>
  35 #include <asm/arch/gpio.h>
  36 #include <asm/arch/udc.h>
  37 #include <asm/arch/pxafb.h>
  38 #include <asm/arch/mmc.h>
  39 #include <asm/arch/irda.h>
  40 #include <asm/arch/i2c.h>
  41
  42 #include "devices.h"
  43 #include "generic.h"
  44
  45 /*
  46  * Get the clock frequency as reflected by CCCR and the turbo flag.
  47  * We assume these values have been applied via a fcs.
  48  * If info is not 0 we also display the current settings.
  49  */
  50 unsigned int get_clk_frequency_khz(int info)
  51 {
  52         if (cpu_is_pxa21x() || cpu_is_pxa25x())
  53                 return pxa25x_get_clk_frequency_khz(info);
  54         else if (cpu_is_pxa27x())
  55                 return pxa27x_get_clk_frequency_khz(info);
  56         else
  57                 return pxa3xx_get_clk_frequency_khz(info);
  58 }
  59 EXPORT_SYMBOL(get_clk_frequency_khz);
  60
  61 /*
  62  * Return the current memory clock frequency in units of 10kHz
  63  */
  64 unsigned int get_memclk_frequency_10khz(void)
  65 {
  66         if (cpu_is_pxa21x() || cpu_is_pxa25x())
  67                 return pxa25x_get_memclk_frequency_10khz();
  68         else if (cpu_is_pxa27x())
  69                 return pxa27x_get_memclk_frequency_10khz();
  70         else
  71                 return pxa3xx_get_memclk_frequency_10khz();
  72 }
  73 EXPORT_SYMBOL(get_memclk_frequency_10khz);
  74
  75 /*
  76  * Handy function to set GPIO alternate functions
  77  */
  78 int pxa_last_gpio;
  79
  80 int pxa_gpio_mode(int gpio_mode)
  81 {
  82         unsigned long flags;
  83         int gpio = gpio_mode & GPIO_MD_MASK_NR;
  84         int fn = (gpio_mode & GPIO_MD_MASK_FN) >> 8;
  85         int gafr;
  86
  87         if (gpio > pxa_last_gpio)
  88                 return -EINVAL;
  89
  90         local_irq_save(flags);
  91         if (gpio_mode & GPIO_DFLT_LOW)
  92                 GPCR(gpio) = GPIO_bit(gpio);
  93         else if (gpio_mode & GPIO_DFLT_HIGH)
  94                 GPSR(gpio) = GPIO_bit(gpio);
  95         if (gpio_mode & GPIO_MD_MASK_DIR)
  96                 GPDR(gpio) |= GPIO_bit(gpio);
  97         else
  98                 GPDR(gpio) &= ~GPIO_bit(gpio);
  99         gafr = GAFR(gpio) & ~(0x3 << (((gpio) & 0xf)*2));
 100         GAFR(gpio) = gafr |  (fn  << (((gpio) & 0xf)*2));
 101         local_irq_restore(flags);
 102
 103         return 0;
 104 }
 105
 106 EXPORT_SYMBOL(pxa_gpio_mode);
 107
 108 int gpio_direction_input(unsigned gpio)
 109 {
 110         unsigned long flags;
 111         u32 mask;
 112
 113         if (gpio > pxa_last_gpio)
 114                 return -EINVAL;
 115
 116         mask = GPIO_bit(gpio);
 117         local_irq_save(flags);
 118         GPDR(gpio) &= ~mask;
 119         local_irq_restore(flags);
 120
 121         return 0;
 122 }
 123 EXPORT_SYMBOL(gpio_direction_input);
 124
 125 int gpio_direction_output(unsigned gpio, int value)
 126 {
 127         unsigned long flags;
 128         u32 mask;
 129
 130         if (gpio > pxa_last_gpio)
 131                 return -EINVAL;
 132
 133         mask = GPIO_bit(gpio);
 134         local_irq_save(flags);
 135         if (value)
 136                 GPSR(gpio) = mask;
 137         else
 138                 GPCR(gpio) = mask;
 139         GPDR(gpio) |= mask;
 140         local_irq_restore(flags);
 141
 142         return 0;
 143 }
 144 EXPORT_SYMBOL(gpio_direction_output);
 145
 146 /*
 147  * Return GPIO level
 148  */
 149 int pxa_gpio_get_value(unsigned gpio)
 150 {
 151         return __gpio_get_value(gpio);
 152 }
 153
 154 EXPORT_SYMBOL(pxa_gpio_get_value);
 155
 156 /*
 157  * Set output GPIO level
 158  */
 159 void pxa_gpio_set_value(unsigned gpio, int value)
 160 {
 161         __gpio_set_value(gpio, value);
 162 }
 163
 164 EXPORT_SYMBOL(pxa_gpio_set_value);
 165
 166 /*
 167  * Routine to safely enable or disable a clock in the CKEN
 168  */
 169 void __pxa_set_cken(int clock, int enable)
 170 {
 171         unsigned long flags;
 172         local_irq_save(flags);
 173
 174         if (enable)
 175                 CKEN |= (1 << clock);
 176         else
 177                 CKEN &= ~(1 << clock);
 178
 179         local_irq_restore(flags);
 180 }
 181
 182 EXPORT_SYMBOL(__pxa_set_cken);
 183
 184 /*
 185  * Intel PXA2xx internal register mapping.
 186  *
 187  * Note 1: not all PXA2xx variants implement all those addresses.
 188  *
 189  * Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table
 190  *         and cache flush area.
 191  */
 192 static struct map_desc standard_io_desc[] __initdata = {
 193         {       /* Devs */
 194                 .virtual        =  0xf2000000,
 195                 .pfn            = __phys_to_pfn(0x40000000),
 196                 .length         = 0x02000000,
 197                 .type           = MT_DEVICE
 198         }, {    /* LCD */
 199                 .virtual        =  0xf4000000,
 200                 .pfn            = __phys_to_pfn(0x44000000),
 201                 .length         = 0x00100000,
 202                 .type           = MT_DEVICE
 203         }, {    /* Mem Ctl */
 204                 .virtual        =  0xf6000000,
 205                 .pfn            = __phys_to_pfn(0x48000000),
 206                 .length         = 0x00100000,
 207                 .type           = MT_DEVICE
 208         }, {    /* USB host */
 209                 .virtual        =  0xf8000000,
 210                 .pfn            = __phys_to_pfn(0x4c000000),
 211                 .length         = 0x00100000,
 212                 .type           = MT_DEVICE
 213         }, {    /* Camera */
 214                 .virtual        =  0xfa000000,
 215                 .pfn            = __phys_to_pfn(0x50000000),
 216                 .length         = 0x00100000,
 217                 .type           = MT_DEVICE
 218         }, {    /* IMem ctl */
 219                 .virtual        =  0xfe000000,
 220                 .pfn            = __phys_to_pfn(0x58000000),
 221                 .length         = 0x00100000,
 222                 .type           = MT_DEVICE
 223         }, {    /* UNCACHED_PHYS_0 */
 224                 .virtual        = 0xff000000,
 225                 .pfn            = __phys_to_pfn(0x00000000),
 226                 .length         = 0x00100000,
 227                 .type           = MT_DEVICE
 228         }
 229 };
 230
 231 void __init pxa_map_io(void)
 232 {
 233         iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
 234         get_clk_frequency_khz(1);
 235 }
 236
 237
 238 void __init pxa_register_device(struct platform_device *dev, void *data)
 239 {
 240         int ret;
 241
 242         dev->dev.platform_data = data;
 243
 244         ret = platform_device_register(dev);
 245         if (ret)
 246                 dev_err(&dev->dev, "unable to register device: %d\n", ret);
 247 }
 248
 249
 250 static struct resource pxamci_resources[] = {
 251         [0] = {
 252                 .start  = 0x41100000,
 253                 .end    = 0x41100fff,
 254                 .flags  = IORESOURCE_MEM,
 255         },
 256         [1] = {
 257                 .start  = IRQ_MMC,
 258                 .end    = IRQ_MMC,
 259                 .flags  = IORESOURCE_IRQ,
 260         },
 261 };
 262
 263 static u64 pxamci_dmamask = 0xffffffffUL;
 264
 265 struct platform_device pxa_device_mci = {
 266         .name           = "pxa2xx-mci",
 267         .id             = -1,
 268         .dev            = {
 269                 .dma_mask = &pxamci_dmamask,
 270                 .coherent_dma_mask = 0xffffffff,
 271         },
 272         .num_resources  = ARRAY_SIZE(pxamci_resources),
 273         .resource       = pxamci_resources,
 274 };
 275
 276 void __init pxa_set_mci_info(struct pxamci_platform_data *info)
 277 {
 278         pxa_register_device(&pxa_device_mci, info);
 279 }
 280
 281
 282 static struct pxa2xx_udc_mach_info pxa_udc_info;
 283
 284 void __init pxa_set_udc_info(struct pxa2xx_udc_mach_info *info)
 285 {
 286         memcpy(&pxa_udc_info, info, sizeof *info);
 287 }
 288
 289 static struct resource pxa2xx_udc_resources[] = {
 290         [0] = {
 291                 .start  = 0x40600000,
 292                 .end    = 0x4060ffff,
 293                 .flags  = IORESOURCE_MEM,
 294         },
 295         [1] = {
 296                 .start  = IRQ_USB,
 297                 .end    = IRQ_USB,
 298                 .flags  = IORESOURCE_IRQ,
 299         },
 300 };
 301
 302 static u64 udc_dma_mask = ~(u32)0;
 303
 304 struct platform_device pxa_device_udc = {
 305         .name           = "pxa2xx-udc",
 306         .id             = -1,
 307         .resource       = pxa2xx_udc_resources,
 308         .num_resources  = ARRAY_SIZE(pxa2xx_udc_resources),
 309         .dev            =  {
 310                 .platform_data  = &pxa_udc_info,
 311                 .dma_mask       = &udc_dma_mask,
 312         }
 313 };
 314
 315 static struct resource pxafb_resources[] = {
 316         [0] = {
 317                 .start  = 0x44000000,
 318                 .end    = 0x4400ffff,
 319                 .flags  = IORESOURCE_MEM,
 320         },
 321         [1] = {
 322                 .start  = IRQ_LCD,
 323                 .end    = IRQ_LCD,
 324                 .flags  = IORESOURCE_IRQ,
 325         },
 326 };
 327
 328 static u64 fb_dma_mask = ~(u64)0;
 329
 330 struct platform_device pxa_device_fb = {
 331         .name           = "pxa2xx-fb",
 332         .id             = -1,
 333         .dev            = {
 334                 .dma_mask       = &fb_dma_mask,
 335                 .coherent_dma_mask = 0xffffffff,
 336         },
 337         .num_resources  = ARRAY_SIZE(pxafb_resources),
 338         .resource       = pxafb_resources,
 339 };
 340
 341 void __init set_pxa_fb_info(struct pxafb_mach_info *info)
 342 {
 343         pxa_register_device(&pxa_device_fb, info);
 344 }
 345
 346 void __init set_pxa_fb_parent(struct device *parent_dev)
 347 {
 348         pxa_device_fb.dev.parent = parent_dev;
 349 }
 350
 351 static struct resource pxa_resource_ffuart[] = {
 352         {
 353                 .start  = __PREG(FFUART),
 354                 .end    = __PREG(FFUART) + 35,
 355                 .flags  = IORESOURCE_MEM,
 356         }, {
 357                 .start  = IRQ_FFUART,
 358                 .end    = IRQ_FFUART,
 359                 .flags  = IORESOURCE_IRQ,
 360         }
 361 };
 362
 363 struct platform_device pxa_device_ffuart= {
 364         .name           = "pxa2xx-uart",
 365         .id             = 0,
 366         .resource       = pxa_resource_ffuart,
 367         .num_resources  = ARRAY_SIZE(pxa_resource_ffuart),
 368 };
 369
 370 static struct resource pxa_resource_btuart[] = {
 371         {
 372                 .start  = __PREG(BTUART),
 373                 .end    = __PREG(BTUART) + 35,
 374                 .flags  = IORESOURCE_MEM,
 375         }, {
 376                 .start  = IRQ_BTUART,
 377                 .end    = IRQ_BTUART,
 378                 .flags  = IORESOURCE_IRQ,
 379         }
 380 };
 381
 382 struct platform_device pxa_device_btuart = {
 383         .name           = "pxa2xx-uart",
 384         .id             = 1,
 385         .resource       = pxa_resource_btuart,
 386         .num_resources  = ARRAY_SIZE(pxa_resource_btuart),
 387 };
 388
 389 static struct resource pxa_resource_stuart[] = {
 390         {
 391                 .start  = __PREG(STUART),
 392                 .end    = __PREG(STUART) + 35,
 393                 .flags  = IORESOURCE_MEM,
 394         }, {
 395                 .start  = IRQ_STUART,
 396                 .end    = IRQ_STUART,
 397                 .flags  = IORESOURCE_IRQ,
 398         }
 399 };
 400
 401 struct platform_device pxa_device_stuart = {
 402         .name           = "pxa2xx-uart",
 403         .id             = 2,
 404         .resource       = pxa_resource_stuart,
 405         .num_resources  = ARRAY_SIZE(pxa_resource_stuart),
 406 };
 407
 408 static struct resource pxa_resource_hwuart[] = {
 409         {
 410                 .start  = __PREG(HWUART),
 411                 .end    = __PREG(HWUART) + 47,
 412                 .flags  = IORESOURCE_MEM,
 413         }, {
 414                 .start  = IRQ_HWUART,
 415                 .end    = IRQ_HWUART,
 416                 .flags  = IORESOURCE_IRQ,
 417         }
 418 };
 419
 420 struct platform_device pxa_device_hwuart = {
 421         .name           = "pxa2xx-uart",
 422         .id             = 3,
 423         .resource       = pxa_resource_hwuart,
 424         .num_resources  = ARRAY_SIZE(pxa_resource_hwuart),
 425 };
 426
 427 static struct resource pxai2c_resources[] = {
 428         {
 429                 .start  = 0x40301680,
 430                 .end    = 0x403016a3,
 431                 .flags  = IORESOURCE_MEM,
 432         }, {
 433                 .start  = IRQ_I2C,
 434                 .end    = IRQ_I2C,
 435                 .flags  = IORESOURCE_IRQ,
 436         },
 437 };
 438
 439 struct platform_device pxa_device_i2c = {
 440         .name           = "pxa2xx-i2c",
 441         .id             = 0,
 442         .resource       = pxai2c_resources,
 443         .num_resources  = ARRAY_SIZE(pxai2c_resources),
 444 };
 445
 446 void __init pxa_set_i2c_info(struct i2c_pxa_platform_data *info)
 447 {
 448         pxa_register_device(&pxa_device_i2c, info);
 449 }
 450
 451 static struct resource pxai2s_resources[] = {
 452         {
 453                 .start  = 0x40400000,
 454                 .end    = 0x40400083,
 455                 .flags  = IORESOURCE_MEM,
 456         }, {
 457                 .start  = IRQ_I2S,
 458                 .end    = IRQ_I2S,
 459                 .flags  = IORESOURCE_IRQ,
 460         },
 461 };
 462
 463 struct platform_device pxa_device_i2s = {
 464         .name           = "pxa2xx-i2s",
 465         .id             = -1,
 466         .resource       = pxai2s_resources,
 467         .num_resources  = ARRAY_SIZE(pxai2s_resources),
 468 };
 469
 470 static u64 pxaficp_dmamask = ~(u32)0;
 471
 472 struct platform_device pxa_device_ficp = {
 473         .name           = "pxa2xx-ir",
 474         .id             = -1,
 475         .dev            = {
 476                 .dma_mask = &pxaficp_dmamask,
 477                 .coherent_dma_mask = 0xffffffff,
 478         },
 479 };
 480
 481 void __init pxa_set_ficp_info(struct pxaficp_platform_data *info)
 482 {
 483         pxa_register_device(&pxa_device_ficp, info);
 484 }
 485
 486 struct platform_device pxa_device_rtc = {
 487         .name           = "sa1100-rtc",
 488         .id             = -1,
 489 };