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