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 static struct resource pxamci_resources[] = {
 239         [0] = {
 240                 .start  = 0x41100000,
 241                 .end    = 0x41100fff,
 242                 .flags  = IORESOURCE_MEM,
 243         },
 244         [1] = {
 245                 .start  = IRQ_MMC,
 246                 .end    = IRQ_MMC,
 247                 .flags  = IORESOURCE_IRQ,
 248         },
 249 };
 250
 251 static u64 pxamci_dmamask = 0xffffffffUL;
 252
 253 struct platform_device pxa_device_mci = {
 254         .name           = "pxa2xx-mci",
 255         .id             = -1,
 256         .dev            = {
 257                 .dma_mask = &pxamci_dmamask,
 258                 .coherent_dma_mask = 0xffffffff,
 259         },
 260         .num_resources  = ARRAY_SIZE(pxamci_resources),
 261         .resource       = pxamci_resources,
 262 };
 263
 264 void __init pxa_set_mci_info(struct pxamci_platform_data *info)
 265 {
 266         pxa_device_mci.dev.platform_data = info;
 267 }
 268
 269
 270 static struct pxa2xx_udc_mach_info pxa_udc_info;
 271
 272 void __init pxa_set_udc_info(struct pxa2xx_udc_mach_info *info)
 273 {
 274         memcpy(&pxa_udc_info, info, sizeof *info);
 275 }
 276
 277 static struct resource pxa2xx_udc_resources[] = {
 278         [0] = {
 279                 .start  = 0x40600000,
 280                 .end    = 0x4060ffff,
 281                 .flags  = IORESOURCE_MEM,
 282         },
 283         [1] = {
 284                 .start  = IRQ_USB,
 285                 .end    = IRQ_USB,
 286                 .flags  = IORESOURCE_IRQ,
 287         },
 288 };
 289
 290 static u64 udc_dma_mask = ~(u32)0;
 291
 292 struct platform_device pxa_device_udc = {
 293         .name           = "pxa2xx-udc",
 294         .id             = -1,
 295         .resource       = pxa2xx_udc_resources,
 296         .num_resources  = ARRAY_SIZE(pxa2xx_udc_resources),
 297         .dev            =  {
 298                 .platform_data  = &pxa_udc_info,
 299                 .dma_mask       = &udc_dma_mask,
 300         }
 301 };
 302
 303 static struct resource pxafb_resources[] = {
 304         [0] = {
 305                 .start  = 0x44000000,
 306                 .end    = 0x4400ffff,
 307                 .flags  = IORESOURCE_MEM,
 308         },
 309         [1] = {
 310                 .start  = IRQ_LCD,
 311                 .end    = IRQ_LCD,
 312                 .flags  = IORESOURCE_IRQ,
 313         },
 314 };
 315
 316 static u64 fb_dma_mask = ~(u64)0;
 317
 318 struct platform_device pxa_device_fb = {
 319         .name           = "pxa2xx-fb",
 320         .id             = -1,
 321         .dev            = {
 322                 .dma_mask       = &fb_dma_mask,
 323                 .coherent_dma_mask = 0xffffffff,
 324         },
 325         .num_resources  = ARRAY_SIZE(pxafb_resources),
 326         .resource       = pxafb_resources,
 327 };
 328
 329 void __init set_pxa_fb_info(struct pxafb_mach_info *info)
 330 {
 331         pxa_device_fb.dev.platform_data = info;
 332 }
 333
 334 void __init set_pxa_fb_parent(struct device *parent_dev)
 335 {
 336         pxa_device_fb.dev.parent = parent_dev;
 337 }
 338
 339 static struct resource pxa_resource_ffuart[] = {
 340         {
 341                 .start  = __PREG(FFUART),
 342                 .end    = __PREG(FFUART) + 35,
 343                 .flags  = IORESOURCE_MEM,
 344         }, {
 345                 .start  = IRQ_FFUART,
 346                 .end    = IRQ_FFUART,
 347                 .flags  = IORESOURCE_IRQ,
 348         }
 349 };
 350
 351 struct platform_device pxa_device_ffuart= {
 352         .name           = "pxa2xx-uart",
 353         .id             = 0,
 354         .resource       = pxa_resource_ffuart,
 355         .num_resources  = ARRAY_SIZE(pxa_resource_ffuart),
 356 };
 357
 358 static struct resource pxa_resource_btuart[] = {
 359         {
 360                 .start  = __PREG(BTUART),
 361                 .end    = __PREG(BTUART) + 35,
 362                 .flags  = IORESOURCE_MEM,
 363         }, {
 364                 .start  = IRQ_BTUART,
 365                 .end    = IRQ_BTUART,
 366                 .flags  = IORESOURCE_IRQ,
 367         }
 368 };
 369
 370 struct platform_device pxa_device_btuart = {
 371         .name           = "pxa2xx-uart",
 372         .id             = 1,
 373         .resource       = pxa_resource_btuart,
 374         .num_resources  = ARRAY_SIZE(pxa_resource_btuart),
 375 };
 376
 377 static struct resource pxa_resource_stuart[] = {
 378         {
 379                 .start  = __PREG(STUART),
 380                 .end    = __PREG(STUART) + 35,
 381                 .flags  = IORESOURCE_MEM,
 382         }, {
 383                 .start  = IRQ_STUART,
 384                 .end    = IRQ_STUART,
 385                 .flags  = IORESOURCE_IRQ,
 386         }
 387 };
 388
 389 struct platform_device pxa_device_stuart = {
 390         .name           = "pxa2xx-uart",
 391         .id             = 2,
 392         .resource       = pxa_resource_stuart,
 393         .num_resources  = ARRAY_SIZE(pxa_resource_stuart),
 394 };
 395
 396 static struct resource pxa_resource_hwuart[] = {
 397         {
 398                 .start  = __PREG(HWUART),
 399                 .end    = __PREG(HWUART) + 47,
 400                 .flags  = IORESOURCE_MEM,
 401         }, {
 402                 .start  = IRQ_HWUART,
 403                 .end    = IRQ_HWUART,
 404                 .flags  = IORESOURCE_IRQ,
 405         }
 406 };
 407
 408 struct platform_device pxa_device_hwuart = {
 409         .name           = "pxa2xx-uart",
 410         .id             = 3,
 411         .resource       = pxa_resource_hwuart,
 412         .num_resources  = ARRAY_SIZE(pxa_resource_hwuart),
 413 };
 414
 415 static struct resource pxai2c_resources[] = {
 416         {
 417                 .start  = 0x40301680,
 418                 .end    = 0x403016a3,
 419                 .flags  = IORESOURCE_MEM,
 420         }, {
 421                 .start  = IRQ_I2C,
 422                 .end    = IRQ_I2C,
 423                 .flags  = IORESOURCE_IRQ,
 424         },
 425 };
 426
 427 struct platform_device pxa_device_i2c = {
 428         .name           = "pxa2xx-i2c",
 429         .id             = 0,
 430         .resource       = pxai2c_resources,
 431         .num_resources  = ARRAY_SIZE(pxai2c_resources),
 432 };
 433
 434 void __init pxa_set_i2c_info(struct i2c_pxa_platform_data *info)
 435 {
 436         pxa_device_i2c.dev.platform_data = info;
 437 }
 438
 439 static struct resource pxai2s_resources[] = {
 440         {
 441                 .start  = 0x40400000,
 442                 .end    = 0x40400083,
 443                 .flags  = IORESOURCE_MEM,
 444         }, {
 445                 .start  = IRQ_I2S,
 446                 .end    = IRQ_I2S,
 447                 .flags  = IORESOURCE_IRQ,
 448         },
 449 };
 450
 451 struct platform_device pxa_device_i2s = {
 452         .name           = "pxa2xx-i2s",
 453         .id             = -1,
 454         .resource       = pxai2s_resources,
 455         .num_resources  = ARRAY_SIZE(pxai2s_resources),
 456 };
 457
 458 static u64 pxaficp_dmamask = ~(u32)0;
 459
 460 struct platform_device pxa_device_ficp = {
 461         .name           = "pxa2xx-ir",
 462         .id             = -1,
 463         .dev            = {
 464                 .dma_mask = &pxaficp_dmamask,
 465                 .coherent_dma_mask = 0xffffffff,
 466         },
 467 };
 468
 469 void __init pxa_set_ficp_info(struct pxaficp_platform_data *info)
 470 {
 471         pxa_device_ficp.dev.platform_data = info;
 472 }
 473
 474 struct platform_device pxa_device_rtc = {
 475         .name           = "sa1100-rtc",
 476         .id             = -1,
 477 };