target/linux/ubicom32/files/arch/ubicom32/mach-ip7k/board-ip7500iap.c

   1 /*
   2  * arch/ubicom32/mach-ip7k/board-ip7500iap.c
   3  *   Support for IP7500 Internet Audio Player
   4  *
   5  * This file supports the IP7500 Internet Audio Player:
   6  *      8007-1110  Rev 1.0
   7  *
   8  * (C) Copyright 2009, Ubicom, Inc.
   9  *
  10  * This file is part of the Ubicom32 Linux Kernel Port.
  11  *
  12  * The Ubicom32 Linux Kernel Port is free software: you can redistribute
  13  * it and/or modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation, either version 2 of the
  15  * License, or (at your option) any later version.
  16  *
  17  * The Ubicom32 Linux Kernel Port is distributed in the hope that it
  18  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  19  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  20  * the GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with the Ubicom32 Linux Kernel Port.  If not,
  24  * see <http://www.gnu.org/licenses/>.
  25  */
  26 #include <linux/device.h>
  27 #include <linux/gpio.h>
  28 #include <asm/board.h>
  29
  30 #include <linux/delay.h>
  31
  32 #include <linux/platform_device.h>
  33 #include <asm/audio.h>
  34 #include <linux/i2c.h>
  35 #include <linux/i2c-gpio.h>
  36
  37 #include <asm/ubicom32sd.h>
  38 #include <asm/sd_tio.h>
  39
  40 #include <asm/ubicom32bl.h>
  41
  42 #include <asm/machdep.h>
  43
  44 /******************************************************************************
  45  * SD/IO Port F (Slot 1) platform data
  46  */
  47 static struct resource ip7500iap_portf_sd_resources[] = {
  48         /*
  49          * Send IRQ
  50          */
  51         [0] = {
  52                 /*
  53                  * The init routine will query the devtree and fill this in
  54                  */
  55                 .flags  = IORESOURCE_IRQ,
  56         },
  57
  58         /*
  59          * Receive IRQ
  60          */
  61         [1] = {
  62                 /*
  63                  * The init routine will query the devtree and fill this in
  64                  */
  65                 .flags  = IORESOURCE_IRQ,
  66         },
  67
  68         /*
  69          * Memory Mapped Registers
  70          */
  71         [2] = {
  72                 /*
  73                  * The init routine will query the devtree and fill this in
  74                  */
  75                 .flags  = IORESOURCE_MEM,
  76         },
  77 };
  78
  79 static struct ubicom32sd_card ip7500iap_portf_sd_cards[] = {
  80         [0] = {
  81                 .pin_wp         = GPIO_RF_7,
  82                 .wp_polarity    = 1,
  83                 .pin_pwr        = GPIO_RF_8,
  84                 .pin_cd         = GPIO_RF_6,
  85         },
  86 };
  87
  88 static struct ubicom32sd_platform_data ip7500iap_portf_sd_platform_data = {
  89         .ncards         = 1,
  90         .cards          = ip7500iap_portf_sd_cards,
  91 };
  92
  93 static struct platform_device ip7500iap_portf_sd_device = {
  94         .name           = "ubicom32sd",
  95         .id             = 0,
  96         .resource       = ip7500iap_portf_sd_resources,
  97         .num_resources  = ARRAY_SIZE(ip7500iap_portf_sd_resources),
  98         .dev            = {
  99                         .platform_data = &ip7500iap_portf_sd_platform_data,
 100         },
 101
 102 };
 103
 104 /*
 105  * ip7500iap_portf_sd_init
 106  */
 107 static void ip7500iap_portf_sd_init(void)
 108 {
 109         /*
 110          * Check the device tree for the sd_tio
 111          */
 112         struct sd_tio_node *sd_node = (struct sd_tio_node *)devtree_find_node("portf_sd");
 113         if (!sd_node) {
 114                 printk(KERN_INFO "PortF SDTIO not found\n");
 115                 return;
 116         }
 117
 118         /*
 119          * Fill in the resources and platform data from devtree information
 120          */
 121         ip7500iap_portf_sd_resources[0].start = sd_node->dn.sendirq;
 122         ip7500iap_portf_sd_resources[1].start = sd_node->dn.recvirq;
 123         ip7500iap_portf_sd_resources[2].start = (u32_t)&(sd_node->regs);
 124         ip7500iap_portf_sd_resources[2].end = (u32_t)&(sd_node->regs) + sizeof(sd_node->regs);
 125
 126         platform_device_register(&ip7500iap_portf_sd_device);
 127 }
 128
 129 /******************************************************************************
 130  * SD/IO Port B (Slot 2) platform data
 131  */
 132 static struct resource ip7500iap_portb_sd_resources[] = {
 133         /*
 134          * Send IRQ
 135          */
 136         [0] = {
 137                 /*
 138                  * The init routine will query the devtree and fill this in
 139                  */
 140                 .flags  = IORESOURCE_IRQ,
 141         },
 142
 143         /*
 144          * Receive IRQ
 145          */
 146         [1] = {
 147                 /*
 148                  * The init routine will query the devtree and fill this in
 149                  */
 150                 .flags  = IORESOURCE_IRQ,
 151         },
 152
 153         /*
 154          * Memory Mapped Registers
 155          */
 156         [2] = {
 157                 /*
 158                  * The init routine will query the devtree and fill this in
 159                  */
 160                 .flags  = IORESOURCE_MEM,
 161         },
 162 };
 163
 164 static struct ubicom32sd_card ip7500iap_portb_sd_cards[] = {
 165         [0] = {
 166                 .pin_wp         = GPIO_RB_13,
 167                 .wp_polarity    = 1,
 168                 .pin_pwr        = GPIO_RB_11,
 169                 .pin_cd         = GPIO_RB_12,
 170         },
 171 };
 172
 173 static struct ubicom32sd_platform_data ip7500iap_portb_sd_platform_data = {
 174         .ncards         = 1,
 175         .cards          = ip7500iap_portb_sd_cards,
 176 };
 177
 178 static struct platform_device ip7500iap_portb_sd_device = {
 179         .name           = "ubicom32sd",
 180         .id             = 1,
 181         .resource       = ip7500iap_portb_sd_resources,
 182         .num_resources  = ARRAY_SIZE(ip7500iap_portb_sd_resources),
 183         .dev            = {
 184                         .platform_data = &ip7500iap_portb_sd_platform_data,
 185         },
 186
 187 };
 188
 189 /*
 190  * ip7500iap_portb_sd_init
 191  */
 192 static void ip7500iap_portb_sd_init(void)
 193 {
 194         /*
 195          * Check the device tree for the sd_tio
 196          */
 197         struct sd_tio_node *sd_node = (struct sd_tio_node *)devtree_find_node("portb_sd");
 198         if (!sd_node) {
 199                 printk(KERN_INFO "PortB SDTIO not found\n");
 200                 return;
 201         }
 202
 203         /*
 204          * Fill in the resources and platform data from devtree information
 205          */
 206         ip7500iap_portb_sd_resources[0].start = sd_node->dn.sendirq;
 207         ip7500iap_portb_sd_resources[1].start = sd_node->dn.recvirq;
 208         ip7500iap_portb_sd_resources[2].start = (u32_t)&(sd_node->regs);
 209         ip7500iap_portb_sd_resources[2].end = (u32_t)&(sd_node->regs) + sizeof(sd_node->regs);
 210
 211         platform_device_register(&ip7500iap_portb_sd_device);
 212 }
 213
 214 /******************************************************************************
 215  * Touch controller
 216  *
 217  * Connected via I2C bus, interrupt on PA6
 218  */
 219 #include <linux/i2c/tsc2007.h>
 220
 221 /*
 222  * ip7500iap_tsc2007_exit_platform_hw
 223  */
 224 static void ip7500iap_tsc2007_exit_platform_hw(void)
 225 {
 226         UBICOM32_IO_PORT(RA)->ctl0 &= ~(0x03 << 19);
 227         gpio_free(GPIO_RA_6);
 228 }
 229
 230 /*
 231  * ip7500iap_tsc2007_init_platform_hw
 232  */
 233 static int ip7500iap_tsc2007_init_platform_hw(void)
 234 {
 235         int res = gpio_request(GPIO_RA_6, "TSC2007_IRQ");
 236         if (res) {
 237                 return res;
 238         }
 239
 240         UBICOM32_IO_PORT(RA)->ctl0 &= ~(0x03 << 19);
 241         UBICOM32_IO_PORT(RA)->ctl0 |= (0x02 << 19);
 242         return 0;
 243 }
 244
 245 /*
 246  * ip7500iap_tsc2007_get_pendown_state
 247  */
 248 static int ip7500iap_tsc2007_get_pendown_state(void)
 249 {
 250         return !gpio_get_value(GPIO_RA_6);
 251 }
 252
 253 static struct tsc2007_platform_data ip7500iap_tsc2007_data = {
 254         .model                  = 2007,
 255         .x_plate_ohms           = 350,
 256         .get_pendown_state      = ip7500iap_tsc2007_get_pendown_state,
 257         .init_platform_hw       = ip7500iap_tsc2007_init_platform_hw,
 258         .exit_platform_hw       = ip7500iap_tsc2007_exit_platform_hw,
 259 };
 260
 261 /******************************************************************************
 262  * i2c devices
 263  *
 264  * DO NOT CHANGE THE ORDER HERE unless you know how this works.  There
 265  * are hardcoded indicies which refer to the order of drivers listed here.
 266  */
 267 static struct i2c_board_info __initdata ip7500iap_i2c_board_info[] = {
 268         /*
 269          * U6, CS4350 DAC, address 0x4B
 270          */
 271         {
 272                 .type           = "cs4350",
 273                 .addr           = 0x4B,
 274         },
 275
 276         /*
 277          * U20, S35390A RTC, address 0x30
 278          */
 279         {
 280                 .type           = "s35390a",
 281                 .addr           = 0x30,
 282         },
 283
 284         /*
 285          * U9, TSC2007 Touch screen controller, address 0x49, irq RA6
 286          */
 287         {
 288                 .type           = "tsc2007",
 289                 .addr           = 0x49,
 290                 .irq            = 46,
 291                 .platform_data  = &ip7500iap_tsc2007_data,
 292         },
 293 };
 294
 295 /*
 296  * I2C bus on the board, SDA PE4, SCL PE5
 297  */
 298 static struct i2c_gpio_platform_data ip7500iap_i2c_data = {
 299         .sda_pin                = GPIO_RF_14,
 300         .scl_pin                = GPIO_RF_13,
 301         .sda_is_open_drain      = 0,
 302         .scl_is_open_drain      = 0,
 303         .udelay                 = 50,
 304 };
 305
 306 static struct platform_device ip7500iap_i2c_device = {
 307         .name   = "i2c-gpio",
 308         .id     = 0,
 309         .dev    = {
 310                 .platform_data = &ip7500iap_i2c_data,
 311         },
 312 };
 313
 314 /******************************************************************************
 315  * Backlight on the board PD0, hardware PWM
 316  */
 317 static struct ubicom32bl_platform_data ip7500iap_backlight_data = {
 318         .type                   = UBICOM32BL_TYPE_PWM,
 319         .pwm_channel            = 2,
 320         .pwm_prescale           = 15,
 321         .pwm_period             = 60,
 322         .default_intensity      = 0x80,
 323 };
 324
 325 static struct platform_device ip7500iap_backlight_device = {
 326         .name   = "ubicom32bl",
 327         .id     = -1,
 328         .dev    = {
 329                 .platform_data = &ip7500iap_backlight_data,
 330         },
 331 };
 332
 333 /******************************************************************************
 334  * Devices on this board
 335  */
 336 static struct platform_device *ip7500iap_devices[] __initdata = {
 337         &ip7500iap_i2c_device,
 338         &ip7500iap_backlight_device,
 339 };
 340
 341 /*
 342  * ip7500iap_power_off
 343  *      Called to turn the power off for this board
 344  */
 345 static void ip7500iap_power_off(void)
 346 {
 347         gpio_set_value(GPIO_RF_11, 0);
 348 }
 349
 350 /*
 351  * ip7500iap_init
 352  *      Called to add the devices which we have on this board
 353  */
 354 static int __init ip7500iap_init(void)
 355 {
 356         struct platform_device *audio_dev;
 357         struct platform_device *audio_dev2;
 358         int ret;
 359
 360         board_init();
 361
 362         ubi_gpio_init();
 363
 364         /*
 365          * Hold the POWER_HOLD line
 366          */
 367         ret = gpio_request(GPIO_RF_11, "POWER_HOLD");
 368         if (ret) {
 369                 printk(KERN_ERR "%s: could not request POWER_HOLD GPIO\n", __FUNCTION__);
 370         }
 371         gpio_direction_output(GPIO_RF_11, 1);
 372         mach_power_off = ip7500iap_power_off;
 373
 374         /*
 375          * DAC nRESET line
 376          */
 377         ret = gpio_request(GPIO_RE_7, "DAC_nRESET");
 378         if (ret) {
 379                 printk(KERN_ERR "%s: could not request DAC_nRESET GPIO\n", __FUNCTION__);
 380         }
 381         gpio_direction_output(GPIO_RE_7, 0);
 382         udelay(1);
 383         gpio_set_value(GPIO_RE_7, 1);
 384
 385         /*
 386          * Bring up any SDIO slots
 387          */
 388         ip7500iap_portb_sd_init();
 389         ip7500iap_portf_sd_init();
 390
 391         /*
 392          * Bring up audio devices
 393          */
 394         platform_add_devices(ip7500iap_devices, ARRAY_SIZE(ip7500iap_devices));
 395
 396         audio_dev = audio_device_alloc("snd-ubi32-cs4350", "audio", "audio-i2sout", 0);
 397         if (audio_dev) {
 398                 ip7500iap_i2c_board_info[0].platform_data = audio_dev;
 399         }
 400
 401         audio_dev2 = audio_device_alloc("snd-ubi32-generic", "audio", "audio-spdifout", 0);
 402         if (audio_dev2) {
 403                 platform_device_register(audio_dev2);
 404         }
 405
 406         printk(KERN_INFO "%s: registering i2c resources\n", __FUNCTION__);
 407         i2c_register_board_info(0, ip7500iap_i2c_board_info, ARRAY_SIZE(ip7500iap_i2c_board_info));
 408
 409         printk(KERN_INFO "IP7500 Internet Audio Player\n");
 410
 411         return 0;
 412 }
 413
 414 arch_initcall(ip7500iap_init);