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