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
  27 #include <asm/hardware.h>
  28 #include <asm/irq.h>
  29 #include <asm/system.h>
  30 #include <asm/pgtable.h>
  31 #include <asm/mach/map.h>
  32
  33 #include <asm/arch/pxa-regs.h>
  34 #include <asm/arch/udc.h>
  35 #include <asm/arch/pxafb.h>
  36 #include <asm/arch/mmc.h>
  37 #include <asm/arch/irda.h>
  38 #include <asm/arch/i2c.h>
  39
  40 #include "generic.h"
  41
  42 /*
  43  * Handy function to set GPIO alternate functions
  44  */
  45
  46 void pxa_gpio_mode(int gpio_mode)
  47 {
  48         unsigned long flags;
  49         int gpio = gpio_mode & GPIO_MD_MASK_NR;
  50         int fn = (gpio_mode & GPIO_MD_MASK_FN) >> 8;
  51         int gafr;
  52
  53         local_irq_save(flags);
  54         if (gpio_mode & GPIO_DFLT_LOW)
  55                 GPCR(gpio) = GPIO_bit(gpio);
  56         else if (gpio_mode & GPIO_DFLT_HIGH)
  57                 GPSR(gpio) = GPIO_bit(gpio);
  58         if (gpio_mode & GPIO_MD_MASK_DIR)
  59                 GPDR(gpio) |= GPIO_bit(gpio);
  60         else
  61                 GPDR(gpio) &= ~GPIO_bit(gpio);
  62         gafr = GAFR(gpio) & ~(0x3 << (((gpio) & 0xf)*2));
  63         GAFR(gpio) = gafr |  (fn  << (((gpio) & 0xf)*2));
  64         local_irq_restore(flags);
  65 }
  66
  67 EXPORT_SYMBOL(pxa_gpio_mode);
  68
  69 /*
  70  * Routine to safely enable or disable a clock in the CKEN
  71  */
  72 void pxa_set_cken(int clock, int enable)
  73 {
  74         unsigned long flags;
  75         local_irq_save(flags);
  76
  77         if (enable)
  78                 CKEN |= clock;
  79         else
  80                 CKEN &= ~clock;
  81
  82         local_irq_restore(flags);
  83 }
  84
  85 EXPORT_SYMBOL(pxa_set_cken);
  86
  87 /*
  88  * Intel PXA2xx internal register mapping.
  89  *
  90  * Note 1: not all PXA2xx variants implement all those addresses.
  91  *
  92  * Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table
  93  *         and cache flush area.
  94  */
  95 static struct map_desc standard_io_desc[] __initdata = {
  96         {       /* Devs */
  97                 .virtual        =  0xf2000000,
  98                 .pfn            = __phys_to_pfn(0x40000000),
  99                 .length         = 0x02000000,
 100                 .type           = MT_DEVICE
 101         }, {    /* LCD */
 102                 .virtual        =  0xf4000000,
 103                 .pfn            = __phys_to_pfn(0x44000000),
 104                 .length         = 0x00100000,
 105                 .type           = MT_DEVICE
 106         }, {    /* Mem Ctl */
 107                 .virtual        =  0xf6000000,
 108                 .pfn            = __phys_to_pfn(0x48000000),
 109                 .length         = 0x00100000,
 110                 .type           = MT_DEVICE
 111         }, {    /* USB host */
 112                 .virtual        =  0xf8000000,
 113                 .pfn            = __phys_to_pfn(0x4c000000),
 114                 .length         = 0x00100000,
 115                 .type           = MT_DEVICE
 116         }, {    /* Camera */
 117                 .virtual        =  0xfa000000,
 118                 .pfn            = __phys_to_pfn(0x50000000),
 119                 .length         = 0x00100000,
 120                 .type           = MT_DEVICE
 121         }, {    /* IMem ctl */
 122                 .virtual        =  0xfe000000,
 123                 .pfn            = __phys_to_pfn(0x58000000),
 124                 .length         = 0x00100000,
 125                 .type           = MT_DEVICE
 126         }, {    /* UNCACHED_PHYS_0 */
 127                 .virtual        = 0xff000000,
 128                 .pfn            = __phys_to_pfn(0x00000000),
 129                 .length         = 0x00100000,
 130                 .type           = MT_DEVICE
 131         }
 132 };
 133
 134 void __init pxa_map_io(void)
 135 {
 136         iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
 137         get_clk_frequency_khz(1);
 138 }
 139
 140
 141 static struct resource pxamci_resources[] = {
 142         [0] = {
 143                 .start  = 0x41100000,
 144                 .end    = 0x41100fff,
 145                 .flags  = IORESOURCE_MEM,
 146         },
 147         [1] = {
 148                 .start  = IRQ_MMC,
 149                 .end    = IRQ_MMC,
 150                 .flags  = IORESOURCE_IRQ,
 151         },
 152 };
 153
 154 static u64 pxamci_dmamask = 0xffffffffUL;
 155
 156 static struct platform_device pxamci_device = {
 157         .name           = "pxa2xx-mci",
 158         .id             = -1,
 159         .dev            = {
 160                 .dma_mask = &pxamci_dmamask,
 161                 .coherent_dma_mask = 0xffffffff,
 162         },
 163         .num_resources  = ARRAY_SIZE(pxamci_resources),
 164         .resource       = pxamci_resources,
 165 };
 166
 167 void __init pxa_set_mci_info(struct pxamci_platform_data *info)
 168 {
 169         pxamci_device.dev.platform_data = info;
 170 }
 171
 172
 173 static struct pxa2xx_udc_mach_info pxa_udc_info;
 174
 175 void __init pxa_set_udc_info(struct pxa2xx_udc_mach_info *info)
 176 {
 177         memcpy(&pxa_udc_info, info, sizeof *info);
 178 }
 179
 180 static struct resource pxa2xx_udc_resources[] = {
 181         [0] = {
 182                 .start  = 0x40600000,
 183                 .end    = 0x4060ffff,
 184                 .flags  = IORESOURCE_MEM,
 185         },
 186         [1] = {
 187                 .start  = IRQ_USB,
 188                 .end    = IRQ_USB,
 189                 .flags  = IORESOURCE_IRQ,
 190         },
 191 };
 192
 193 static u64 udc_dma_mask = ~(u32)0;
 194
 195 static struct platform_device udc_device = {
 196         .name           = "pxa2xx-udc",
 197         .id             = -1,
 198         .resource       = pxa2xx_udc_resources,
 199         .num_resources  = ARRAY_SIZE(pxa2xx_udc_resources),
 200         .dev            =  {
 201                 .platform_data  = &pxa_udc_info,
 202                 .dma_mask       = &udc_dma_mask,
 203         }
 204 };
 205
 206 static struct pxafb_mach_info pxa_fb_info;
 207
 208 void __init set_pxa_fb_info(struct pxafb_mach_info *hard_pxa_fb_info)
 209 {
 210         memcpy(&pxa_fb_info,hard_pxa_fb_info,sizeof(struct pxafb_mach_info));
 211 }
 212
 213 static struct resource pxafb_resources[] = {
 214         [0] = {
 215                 .start  = 0x44000000,
 216                 .end    = 0x4400ffff,
 217                 .flags  = IORESOURCE_MEM,
 218         },
 219         [1] = {
 220                 .start  = IRQ_LCD,
 221                 .end    = IRQ_LCD,
 222                 .flags  = IORESOURCE_IRQ,
 223         },
 224 };
 225
 226 static u64 fb_dma_mask = ~(u64)0;
 227
 228 static struct platform_device pxafb_device = {
 229         .name           = "pxa2xx-fb",
 230         .id             = -1,
 231         .dev            = {
 232                 .platform_data  = &pxa_fb_info,
 233                 .dma_mask       = &fb_dma_mask,
 234                 .coherent_dma_mask = 0xffffffff,
 235         },
 236         .num_resources  = ARRAY_SIZE(pxafb_resources),
 237         .resource       = pxafb_resources,
 238 };
 239
 240 void __init set_pxa_fb_parent(struct device *parent_dev)
 241 {
 242         pxafb_device.dev.parent = parent_dev;
 243 }
 244
 245 static struct platform_device ffuart_device = {
 246         .name           = "pxa2xx-uart",
 247         .id             = 0,
 248 };
 249 static struct platform_device btuart_device = {
 250         .name           = "pxa2xx-uart",
 251         .id             = 1,
 252 };
 253 static struct platform_device stuart_device = {
 254         .name           = "pxa2xx-uart",
 255         .id             = 2,
 256 };
 257 static struct platform_device hwuart_device = {
 258         .name           = "pxa2xx-uart",
 259         .id             = 3,
 260 };
 261
 262 static struct resource i2c_resources[] = {
 263         {
 264                 .start  = 0x40301680,
 265                 .end    = 0x403016a3,
 266                 .flags  = IORESOURCE_MEM,
 267         }, {
 268                 .start  = IRQ_I2C,
 269                 .end    = IRQ_I2C,
 270                 .flags  = IORESOURCE_IRQ,
 271         },
 272 };
 273
 274 static struct platform_device i2c_device = {
 275         .name           = "pxa2xx-i2c",
 276         .id             = 0,
 277         .resource       = i2c_resources,
 278         .num_resources  = ARRAY_SIZE(i2c_resources),
 279 };
 280
 281 void __init pxa_set_i2c_info(struct i2c_pxa_platform_data *info)
 282 {
 283         i2c_device.dev.platform_data = info;
 284 }
 285
 286 static struct resource i2s_resources[] = {
 287         {
 288                 .start  = 0x40400000,
 289                 .end    = 0x40400083,
 290                 .flags  = IORESOURCE_MEM,
 291         }, {
 292                 .start  = IRQ_I2S,
 293                 .end    = IRQ_I2S,
 294                 .flags  = IORESOURCE_IRQ,
 295         },
 296 };
 297
 298 static struct platform_device i2s_device = {
 299         .name           = "pxa2xx-i2s",
 300         .id             = -1,
 301         .resource       = i2s_resources,
 302         .num_resources  = ARRAY_SIZE(i2s_resources),
 303 };
 304
 305 static u64 pxaficp_dmamask = ~(u32)0;
 306
 307 static struct platform_device pxaficp_device = {
 308         .name           = "pxa2xx-ir",
 309         .id             = -1,
 310         .dev            = {
 311                 .dma_mask = &pxaficp_dmamask,
 312                 .coherent_dma_mask = 0xffffffff,
 313         },
 314 };
 315
 316 void __init pxa_set_ficp_info(struct pxaficp_platform_data *info)
 317 {
 318         pxaficp_device.dev.platform_data = info;
 319 }
 320
 321 static struct platform_device *devices[] __initdata = {
 322         &pxamci_device,
 323         &udc_device,
 324         &pxafb_device,
 325         &ffuart_device,
 326         &btuart_device,
 327         &stuart_device,
 328         &pxaficp_device,
 329         &i2c_device,
 330         &i2s_device,
 331 };
 332
 333 static int __init pxa_init(void)
 334 {
 335         int cpuid, ret;
 336
 337         ret = platform_add_devices(devices, ARRAY_SIZE(devices));
 338         if (ret)
 339                 return ret;
 340
 341         /* Only add HWUART for PXA255/26x; PXA210/250/27x do not have it. */
 342         cpuid = read_cpuid(CPUID_ID);
 343         if (((cpuid >> 4) & 0xfff) == 0x2d0 ||
 344             ((cpuid >> 4) & 0xfff) == 0x290)
 345                 ret = platform_device_register(&hwuart_device);
 346
 347         return ret;
 348 }
 349
 350 subsys_initcall(pxa_init);