arch/arm/mach-davinci/board-evm.c

   1 /*
   2  * TI DaVinci EVM board support
   3  *
   4  * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
   5  *
   6  * 2007 (c) MontaVista Software, Inc. This file is licensed under
   7  * the terms of the GNU General Public License version 2. This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/init.h>
  14 #include <linux/dma-mapping.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/gpio.h>
  17 #include <linux/leds.h>
  18
  19 #include <linux/i2c.h>
  20 #include <linux/i2c/pcf857x.h>
  21 #include <linux/i2c/at24.h>
  22
  23 #include <linux/mtd/mtd.h>
  24 #include <linux/mtd/partitions.h>
  25 #include <linux/mtd/physmap.h>
  26 #include <linux/io.h>
  27
  28 #include <asm/setup.h>
  29 #include <asm/mach-types.h>
  30
  31 #include <asm/mach/arch.h>
  32 #include <asm/mach/map.h>
  33 #include <asm/mach/flash.h>
  34
  35 #include <mach/hardware.h>
  36 #include <mach/common.h>
  37 #include <mach/i2c.h>
  38
  39 /* other misc. init functions */
  40 void __init davinci_psc_init(void);
  41 void __init davinci_irq_init(void);
  42 void __init davinci_map_common_io(void);
  43 void __init davinci_init_common_hw(void);
  44
  45 #if defined(CONFIG_MTD_PHYSMAP) || \
  46     defined(CONFIG_MTD_PHYSMAP_MODULE)
  47
  48 static struct mtd_partition davinci_evm_norflash_partitions[] = {
  49         /* bootloader (U-Boot, etc) in first 4 sectors */
  50         {
  51                 .name           = "bootloader",
  52                 .offset         = 0,
  53                 .size           = 4 * SZ_64K,
  54                 .mask_flags     = MTD_WRITEABLE, /* force read-only */
  55         },
  56         /* bootloader params in the next 1 sectors */
  57         {
  58                 .name           = "params",
  59                 .offset         = MTDPART_OFS_APPEND,
  60                 .size           = SZ_64K,
  61                 .mask_flags     = 0,
  62         },
  63         /* kernel */
  64         {
  65                 .name           = "kernel",
  66                 .offset         = MTDPART_OFS_APPEND,
  67                 .size           = SZ_2M,
  68                 .mask_flags     = 0
  69         },
  70         /* file system */
  71         {
  72                 .name           = "filesystem",
  73                 .offset         = MTDPART_OFS_APPEND,
  74                 .size           = MTDPART_SIZ_FULL,
  75                 .mask_flags     = 0
  76         }
  77 };
  78
  79 static struct physmap_flash_data davinci_evm_norflash_data = {
  80         .width          = 2,
  81         .parts          = davinci_evm_norflash_partitions,
  82         .nr_parts       = ARRAY_SIZE(davinci_evm_norflash_partitions),
  83 };
  84
  85 /* NOTE: CFI probe will correctly detect flash part as 32M, but EMIF
  86  * limits addresses to 16M, so using addresses past 16M will wrap */
  87 static struct resource davinci_evm_norflash_resource = {
  88         .start          = DAVINCI_ASYNC_EMIF_DATA_CE0_BASE,
  89         .end            = DAVINCI_ASYNC_EMIF_DATA_CE0_BASE + SZ_16M - 1,
  90         .flags          = IORESOURCE_MEM,
  91 };
  92
  93 static struct platform_device davinci_evm_norflash_device = {
  94         .name           = "physmap-flash",
  95         .id             = 0,
  96         .dev            = {
  97                 .platform_data  = &davinci_evm_norflash_data,
  98         },
  99         .num_resources  = 1,
 100         .resource       = &davinci_evm_norflash_resource,
 101 };
 102
 103 #endif
 104
 105 #if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \
 106     defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)
 107
 108 static struct resource ide_resources[] = {
 109         {
 110                 .start          = DAVINCI_CFC_ATA_BASE,
 111                 .end            = DAVINCI_CFC_ATA_BASE + 0x7ff,
 112                 .flags          = IORESOURCE_MEM,
 113         },
 114         {
 115                 .start          = IRQ_IDE,
 116                 .end            = IRQ_IDE,
 117                 .flags          = IORESOURCE_IRQ,
 118         },
 119 };
 120
 121 static u64 ide_dma_mask = DMA_BIT_MASK(32);
 122
 123 static struct platform_device ide_dev = {
 124         .name           = "palm_bk3710",
 125         .id             = -1,
 126         .resource       = ide_resources,
 127         .num_resources  = ARRAY_SIZE(ide_resources),
 128         .dev = {
 129                 .dma_mask               = &ide_dma_mask,
 130                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 131         },
 132 };
 133
 134 #endif
 135
 136 /*----------------------------------------------------------------------*/
 137
 138 /*
 139  * I2C GPIO expanders
 140  */
 141
 142 #define PCF_Uxx_BASE(x) (DAVINCI_N_GPIO + ((x) * 8))
 143
 144
 145 /* U2 -- LEDs */
 146
 147 static struct gpio_led evm_leds[] = {
 148         { .name = "DS8", .active_low = 1,
 149                 .default_trigger = "heartbeat", },
 150         { .name = "DS7", .active_low = 1, },
 151         { .name = "DS6", .active_low = 1, },
 152         { .name = "DS5", .active_low = 1, },
 153         { .name = "DS4", .active_low = 1, },
 154         { .name = "DS3", .active_low = 1, },
 155         { .name = "DS2", .active_low = 1,
 156                 .default_trigger = "mmc0", },
 157         { .name = "DS1", .active_low = 1,
 158                 .default_trigger = "ide-disk", },
 159 };
 160
 161 static const struct gpio_led_platform_data evm_led_data = {
 162         .num_leds       = ARRAY_SIZE(evm_leds),
 163         .leds           = evm_leds,
 164 };
 165
 166 static struct platform_device *evm_led_dev;
 167
 168 static int
 169 evm_led_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
 170 {
 171         struct gpio_led *leds = evm_leds;
 172         int status;
 173
 174         while (ngpio--) {
 175                 leds->gpio = gpio++;
 176                 leds++;
 177         }
 178
 179         /* what an extremely annoying way to be forced to handle
 180          * device unregistration ...
 181          */
 182         evm_led_dev = platform_device_alloc("leds-gpio", 0);
 183         platform_device_add_data(evm_led_dev,
 184                         &evm_led_data, sizeof evm_led_data);
 185
 186         evm_led_dev->dev.parent = &client->dev;
 187         status = platform_device_add(evm_led_dev);
 188         if (status < 0) {
 189                 platform_device_put(evm_led_dev);
 190                 evm_led_dev = NULL;
 191         }
 192         return status;
 193 }
 194
 195 static int
 196 evm_led_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
 197 {
 198         if (evm_led_dev) {
 199                 platform_device_unregister(evm_led_dev);
 200                 evm_led_dev = NULL;
 201         }
 202         return 0;
 203 }
 204
 205 static struct pcf857x_platform_data pcf_data_u2 = {
 206         .gpio_base      = PCF_Uxx_BASE(0),
 207         .setup          = evm_led_setup,
 208         .teardown       = evm_led_teardown,
 209 };
 210
 211
 212 /* U18 - A/V clock generator and user switch */
 213
 214 static int sw_gpio;
 215
 216 static ssize_t
 217 sw_show(struct device *d, struct device_attribute *a, char *buf)
 218 {
 219         char *s = gpio_get_value_cansleep(sw_gpio) ? "on\n" : "off\n";
 220
 221         strcpy(buf, s);
 222         return strlen(s);
 223 }
 224
 225 static DEVICE_ATTR(user_sw, S_IRUGO, sw_show, NULL);
 226
 227 static int
 228 evm_u18_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
 229 {
 230         int     status;
 231
 232         /* export dip switch option */
 233         sw_gpio = gpio + 7;
 234         status = gpio_request(sw_gpio, "user_sw");
 235         if (status == 0)
 236                 status = gpio_direction_input(sw_gpio);
 237         if (status == 0)
 238                 status = device_create_file(&client->dev, &dev_attr_user_sw);
 239         else
 240                 gpio_free(sw_gpio);
 241         if (status != 0)
 242                 sw_gpio = -EINVAL;
 243
 244         /* audio PLL:  48 kHz (vs 44.1 or 32), single rate (vs double) */
 245         gpio_request(gpio + 3, "pll_fs2");
 246         gpio_direction_output(gpio + 3, 0);
 247
 248         gpio_request(gpio + 2, "pll_fs1");
 249         gpio_direction_output(gpio + 2, 0);
 250
 251         gpio_request(gpio + 1, "pll_sr");
 252         gpio_direction_output(gpio + 1, 0);
 253
 254         return 0;
 255 }
 256
 257 static int
 258 evm_u18_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
 259 {
 260         gpio_free(gpio + 1);
 261         gpio_free(gpio + 2);
 262         gpio_free(gpio + 3);
 263
 264         if (sw_gpio > 0) {
 265                 device_remove_file(&client->dev, &dev_attr_user_sw);
 266                 gpio_free(sw_gpio);
 267         }
 268         return 0;
 269 }
 270
 271 static struct pcf857x_platform_data pcf_data_u18 = {
 272         .gpio_base      = PCF_Uxx_BASE(1),
 273         .n_latch        = (1 << 3) | (1 << 2) | (1 << 1),
 274         .setup          = evm_u18_setup,
 275         .teardown       = evm_u18_teardown,
 276 };
 277
 278
 279 /* U35 - various I/O signals used to manage USB, CF, ATA, etc */
 280
 281 static int
 282 evm_u35_setup(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
 283 {
 284         /* p0 = nDRV_VBUS (initial:  don't supply it) */
 285         gpio_request(gpio + 0, "nDRV_VBUS");
 286         gpio_direction_output(gpio + 0, 1);
 287
 288         /* p1 = VDDIMX_EN */
 289         gpio_request(gpio + 1, "VDDIMX_EN");
 290         gpio_direction_output(gpio + 1, 1);
 291
 292         /* p2 = VLYNQ_EN */
 293         gpio_request(gpio + 2, "VLYNQ_EN");
 294         gpio_direction_output(gpio + 2, 1);
 295
 296         /* p3 = n3V3_CF_RESET (initial: stay in reset) */
 297         gpio_request(gpio + 3, "nCF_RESET");
 298         gpio_direction_output(gpio + 3, 0);
 299
 300         /* (p4 unused) */
 301
 302         /* p5 = 1V8_WLAN_RESET (initial: stay in reset) */
 303         gpio_request(gpio + 5, "WLAN_RESET");
 304         gpio_direction_output(gpio + 5, 1);
 305
 306         /* p6 = nATA_SEL (initial: select) */
 307         gpio_request(gpio + 6, "nATA_SEL");
 308         gpio_direction_output(gpio + 6, 0);
 309
 310         /* p7 = nCF_SEL (initial: deselect) */
 311         gpio_request(gpio + 7, "nCF_SEL");
 312         gpio_direction_output(gpio + 7, 1);
 313
 314         /* irlml6401 sustains over 3A, switches 5V in under 8 msec */
 315         setup_usb(500, 8);
 316
 317         return 0;
 318 }
 319
 320 static int
 321 evm_u35_teardown(struct i2c_client *client, int gpio, unsigned ngpio, void *c)
 322 {
 323         gpio_free(gpio + 7);
 324         gpio_free(gpio + 6);
 325         gpio_free(gpio + 5);
 326         gpio_free(gpio + 3);
 327         gpio_free(gpio + 2);
 328         gpio_free(gpio + 1);
 329         gpio_free(gpio + 0);
 330         return 0;
 331 }
 332
 333 static struct pcf857x_platform_data pcf_data_u35 = {
 334         .gpio_base      = PCF_Uxx_BASE(2),
 335         .setup          = evm_u35_setup,
 336         .teardown       = evm_u35_teardown,
 337 };
 338
 339 /*----------------------------------------------------------------------*/
 340
 341 /* Most of this EEPROM is unused, but U-Boot uses some data:
 342  *  - 0x7f00, 6 bytes Ethernet Address
 343  *  - 0x0039, 1 byte NTSC vs PAL (bit 0x80 == PAL)
 344  *  - ... newer boards may have more
 345  */
 346 static struct at24_platform_data eeprom_info = {
 347         .byte_len       = (256*1024) / 8,
 348         .page_size      = 64,
 349         .flags          = AT24_FLAG_ADDR16,
 350 };
 351
 352 static struct i2c_board_info __initdata i2c_info[] =  {
 353         {
 354                 I2C_BOARD_INFO("pcf8574", 0x38),
 355                 .platform_data  = &pcf_data_u2,
 356         },
 357         {
 358                 I2C_BOARD_INFO("pcf8574", 0x39),
 359                 .platform_data  = &pcf_data_u18,
 360         },
 361         {
 362                 I2C_BOARD_INFO("pcf8574", 0x3a),
 363                 .platform_data  = &pcf_data_u35,
 364         },
 365         {
 366                 I2C_BOARD_INFO("24c256", 0x50),
 367                 .platform_data  = &eeprom_info,
 368         },
 369         /* ALSO:
 370          * - tvl320aic33 audio codec (0x1b)
 371          * - msp430 microcontroller (0x23)
 372          * - tvp5146 video decoder (0x5d)
 373          */
 374 };
 375
 376 /* The msp430 uses a slow bitbanged I2C implementation (ergo 20 KHz),
 377  * which requires 100 usec of idle bus after i2c writes sent to it.
 378  */
 379 static struct davinci_i2c_platform_data i2c_pdata = {
 380         .bus_freq       = 20 /* kHz */,
 381         .bus_delay      = 100 /* usec */,
 382 };
 383
 384 static void __init evm_init_i2c(void)
 385 {
 386         davinci_init_i2c(&i2c_pdata);
 387         i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info));
 388 }
 389
 390 static struct platform_device *davinci_evm_devices[] __initdata = {
 391 #if defined(CONFIG_MTD_PHYSMAP) || \
 392     defined(CONFIG_MTD_PHYSMAP_MODULE)
 393         &davinci_evm_norflash_device,
 394 #endif
 395 #if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \
 396     defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)
 397         &ide_dev,
 398 #endif
 399 };
 400
 401 static void __init
 402 davinci_evm_map_io(void)
 403 {
 404         davinci_map_common_io();
 405 }
 406
 407 static __init void davinci_evm_init(void)
 408 {
 409         davinci_psc_init();
 410
 411 #if defined(CONFIG_BLK_DEV_PALMCHIP_BK3710) || \
 412     defined(CONFIG_BLK_DEV_PALMCHIP_BK3710_MODULE)
 413 #if defined(CONFIG_MTD_PHYSMAP) || \
 414     defined(CONFIG_MTD_PHYSMAP_MODULE)
 415         printk(KERN_WARNING "WARNING: both IDE and NOR flash are enabled, "
 416                "but share pins.\n\t Disable IDE for NOR support.\n");
 417 #endif
 418 #endif
 419
 420         platform_add_devices(davinci_evm_devices,
 421                              ARRAY_SIZE(davinci_evm_devices));
 422         evm_init_i2c();
 423 }
 424
 425 static __init void davinci_evm_irq_init(void)
 426 {
 427         davinci_init_common_hw();
 428         davinci_irq_init();
 429 }
 430
 431 MACHINE_START(DAVINCI_EVM, "DaVinci EVM")
 432         /* Maintainer: MontaVista Software <source@mvista.com> */
 433         .phys_io      = IO_PHYS,
 434         .io_pg_offst  = (__IO_ADDRESS(IO_PHYS) >> 18) & 0xfffc,
 435         .boot_params  = (DAVINCI_DDR_BASE + 0x100),
 436         .map_io       = davinci_evm_map_io,
 437         .init_irq     = davinci_evm_irq_init,
 438         .timer        = &davinci_timer,
 439         .init_machine = davinci_evm_init,
 440 MACHINE_END