arch/arm/mach-ep93xx/vision_ep9307.c

   1 /*
   2  * arch/arm/mach-ep93xx/vision_ep9307.c
   3  * Vision Engraving Systems EP9307 SoM support.
   4  *
   5  * Copyright (C) 2008-2011 Vision Engraving Systems
   6  * H Hartley Sweeten <hsweeten@visionengravers.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or (at
  11  * your option) any later version.
  12  */
  13
  14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  15
  16 #include <linux/kernel.h>
  17 #include <linux/init.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/irq.h>
  20 #include <linux/gpio.h>
  21 #include <linux/fb.h>
  22 #include <linux/io.h>
  23 #include <linux/mtd/partitions.h>
  24 #include <linux/i2c.h>
  25 #include <linux/i2c-gpio.h>
  26 #include <linux/platform_data/pca953x.h>
  27 #include <linux/spi/spi.h>
  28 #include <linux/spi/flash.h>
  29 #include <linux/spi/mmc_spi.h>
  30 #include <linux/mmc/host.h>
  31
  32 #include <sound/cs4271.h>
  33
  34 #include <mach/hardware.h>
  35 #include <linux/platform_data/video-ep93xx.h>
  36 #include <linux/platform_data/spi-ep93xx.h>
  37 #include <mach/gpio-ep93xx.h>
  38
  39 #include <asm/mach-types.h>
  40 #include <asm/mach/map.h>
  41 #include <asm/mach/arch.h>
  42
  43 #include "soc.h"
  44
  45 /*************************************************************************
  46  * Static I/O mappings for the FPGA
  47  *************************************************************************/
  48 #define VISION_PHYS_BASE        EP93XX_CS7_PHYS_BASE
  49 #define VISION_VIRT_BASE        0xfebff000
  50
  51 static struct map_desc vision_io_desc[] __initdata = {
  52         {
  53                 .virtual        = VISION_VIRT_BASE,
  54                 .pfn            = __phys_to_pfn(VISION_PHYS_BASE),
  55                 .length         = SZ_4K,
  56                 .type           = MT_DEVICE,
  57         },
  58 };
  59
  60 static void __init vision_map_io(void)
  61 {
  62         ep93xx_map_io();
  63
  64         iotable_init(vision_io_desc, ARRAY_SIZE(vision_io_desc));
  65 }
  66
  67 /*************************************************************************
  68  * Ethernet
  69  *************************************************************************/
  70 static struct ep93xx_eth_data vision_eth_data __initdata = {
  71         .phy_id         = 1,
  72 };
  73
  74 /*************************************************************************
  75  * Framebuffer
  76  *************************************************************************/
  77 #define VISION_LCD_ENABLE       EP93XX_GPIO_LINE_EGPIO1
  78
  79 static int vision_lcd_setup(struct platform_device *pdev)
  80 {
  81         int err;
  82
  83         err = gpio_request_one(VISION_LCD_ENABLE, GPIOF_INIT_HIGH,
  84                                 dev_name(&pdev->dev));
  85         if (err)
  86                 return err;
  87
  88         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_RAS |
  89                                  EP93XX_SYSCON_DEVCFG_RASONP3 |
  90                                  EP93XX_SYSCON_DEVCFG_EXVC);
  91
  92         return 0;
  93 }
  94
  95 static void vision_lcd_teardown(struct platform_device *pdev)
  96 {
  97         gpio_free(VISION_LCD_ENABLE);
  98 }
  99
 100 static void vision_lcd_blank(int blank_mode, struct fb_info *info)
 101 {
 102         if (blank_mode)
 103                 gpio_set_value(VISION_LCD_ENABLE, 0);
 104         else
 105                 gpio_set_value(VISION_LCD_ENABLE, 1);
 106 }
 107
 108 static struct ep93xxfb_mach_info ep93xxfb_info __initdata = {
 109         .num_modes      = EP93XXFB_USE_MODEDB,
 110         .bpp            = 16,
 111         .flags          = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
 112         .setup          = vision_lcd_setup,
 113         .teardown       = vision_lcd_teardown,
 114         .blank          = vision_lcd_blank,
 115 };
 116
 117
 118 /*************************************************************************
 119  * GPIO Expanders
 120  *************************************************************************/
 121 #define PCA9539_74_GPIO_BASE    (EP93XX_GPIO_LINE_MAX + 1)
 122 #define PCA9539_75_GPIO_BASE    (PCA9539_74_GPIO_BASE + 16)
 123 #define PCA9539_76_GPIO_BASE    (PCA9539_75_GPIO_BASE + 16)
 124 #define PCA9539_77_GPIO_BASE    (PCA9539_76_GPIO_BASE + 16)
 125
 126 static struct pca953x_platform_data pca953x_74_gpio_data = {
 127         .gpio_base      = PCA9539_74_GPIO_BASE,
 128         .irq_base       = EP93XX_BOARD_IRQ(0),
 129 };
 130
 131 static struct pca953x_platform_data pca953x_75_gpio_data = {
 132         .gpio_base      = PCA9539_75_GPIO_BASE,
 133         .irq_base       = -1,
 134 };
 135
 136 static struct pca953x_platform_data pca953x_76_gpio_data = {
 137         .gpio_base      = PCA9539_76_GPIO_BASE,
 138         .irq_base       = -1,
 139 };
 140
 141 static struct pca953x_platform_data pca953x_77_gpio_data = {
 142         .gpio_base      = PCA9539_77_GPIO_BASE,
 143         .irq_base       = -1,
 144 };
 145
 146 /*************************************************************************
 147  * I2C Bus
 148  *************************************************************************/
 149 static struct i2c_gpio_platform_data vision_i2c_gpio_data __initdata = {
 150         .sda_pin                = EP93XX_GPIO_LINE_EEDAT,
 151         .scl_pin                = EP93XX_GPIO_LINE_EECLK,
 152 };
 153
 154 static struct i2c_board_info vision_i2c_info[] __initdata = {
 155         {
 156                 I2C_BOARD_INFO("isl1208", 0x6f),
 157                 .irq            = IRQ_EP93XX_EXT1,
 158         }, {
 159                 I2C_BOARD_INFO("pca9539", 0x74),
 160                 .platform_data  = &pca953x_74_gpio_data,
 161         }, {
 162                 I2C_BOARD_INFO("pca9539", 0x75),
 163                 .platform_data  = &pca953x_75_gpio_data,
 164         }, {
 165                 I2C_BOARD_INFO("pca9539", 0x76),
 166                 .platform_data  = &pca953x_76_gpio_data,
 167         }, {
 168                 I2C_BOARD_INFO("pca9539", 0x77),
 169                 .platform_data  = &pca953x_77_gpio_data,
 170         },
 171 };
 172
 173 /*************************************************************************
 174  * SPI CS4271 Audio Codec
 175  *************************************************************************/
 176 static struct cs4271_platform_data vision_cs4271_data = {
 177         .gpio_nreset    = EP93XX_GPIO_LINE_H(2),
 178 };
 179
 180 static int vision_cs4271_hw_setup(struct spi_device *spi)
 181 {
 182         return gpio_request_one(EP93XX_GPIO_LINE_EGPIO6,
 183                                 GPIOF_OUT_INIT_HIGH, spi->modalias);
 184 }
 185
 186 static void vision_cs4271_hw_cleanup(struct spi_device *spi)
 187 {
 188         gpio_free(EP93XX_GPIO_LINE_EGPIO6);
 189 }
 190
 191 static void vision_cs4271_hw_cs_control(struct spi_device *spi, int value)
 192 {
 193         gpio_set_value(EP93XX_GPIO_LINE_EGPIO6, value);
 194 }
 195
 196 static struct ep93xx_spi_chip_ops vision_cs4271_hw = {
 197         .setup          = vision_cs4271_hw_setup,
 198         .cleanup        = vision_cs4271_hw_cleanup,
 199         .cs_control     = vision_cs4271_hw_cs_control,
 200 };
 201
 202 /*************************************************************************
 203  * SPI Flash
 204  *************************************************************************/
 205 #define VISION_SPI_FLASH_CS     EP93XX_GPIO_LINE_EGPIO7
 206
 207 static struct mtd_partition vision_spi_flash_partitions[] = {
 208         {
 209                 .name   = "SPI bootstrap",
 210                 .offset = 0,
 211                 .size   = SZ_4K,
 212         }, {
 213                 .name   = "Bootstrap config",
 214                 .offset = MTDPART_OFS_APPEND,
 215                 .size   = SZ_4K,
 216         }, {
 217                 .name   = "System config",
 218                 .offset = MTDPART_OFS_APPEND,
 219                 .size   = MTDPART_SIZ_FULL,
 220         },
 221 };
 222
 223 static struct flash_platform_data vision_spi_flash_data = {
 224         .name           = "SPI Flash",
 225         .parts          = vision_spi_flash_partitions,
 226         .nr_parts       = ARRAY_SIZE(vision_spi_flash_partitions),
 227 };
 228
 229 static int vision_spi_flash_hw_setup(struct spi_device *spi)
 230 {
 231         return gpio_request_one(VISION_SPI_FLASH_CS, GPIOF_INIT_HIGH,
 232                                 spi->modalias);
 233 }
 234
 235 static void vision_spi_flash_hw_cleanup(struct spi_device *spi)
 236 {
 237         gpio_free(VISION_SPI_FLASH_CS);
 238 }
 239
 240 static void vision_spi_flash_hw_cs_control(struct spi_device *spi, int value)
 241 {
 242         gpio_set_value(VISION_SPI_FLASH_CS, value);
 243 }
 244
 245 static struct ep93xx_spi_chip_ops vision_spi_flash_hw = {
 246         .setup          = vision_spi_flash_hw_setup,
 247         .cleanup        = vision_spi_flash_hw_cleanup,
 248         .cs_control     = vision_spi_flash_hw_cs_control,
 249 };
 250
 251 /*************************************************************************
 252  * SPI SD/MMC host
 253  *************************************************************************/
 254 #define VISION_SPI_MMC_CS       EP93XX_GPIO_LINE_G(2)
 255 #define VISION_SPI_MMC_WP       EP93XX_GPIO_LINE_F(0)
 256 #define VISION_SPI_MMC_CD       EP93XX_GPIO_LINE_EGPIO15
 257
 258 static struct mmc_spi_platform_data vision_spi_mmc_data = {
 259         .detect_delay   = 100,
 260         .powerup_msecs  = 100,
 261         .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
 262         .flags          = MMC_SPI_USE_CD_GPIO | MMC_SPI_USE_RO_GPIO,
 263         .cd_gpio        = VISION_SPI_MMC_CD,
 264         .cd_debounce    = 1,
 265         .ro_gpio        = VISION_SPI_MMC_WP,
 266         .caps2          = MMC_CAP2_RO_ACTIVE_HIGH,
 267 };
 268
 269 static int vision_spi_mmc_hw_setup(struct spi_device *spi)
 270 {
 271         return gpio_request_one(VISION_SPI_MMC_CS, GPIOF_INIT_HIGH,
 272                                 spi->modalias);
 273 }
 274
 275 static void vision_spi_mmc_hw_cleanup(struct spi_device *spi)
 276 {
 277         gpio_free(VISION_SPI_MMC_CS);
 278 }
 279
 280 static void vision_spi_mmc_hw_cs_control(struct spi_device *spi, int value)
 281 {
 282         gpio_set_value(VISION_SPI_MMC_CS, value);
 283 }
 284
 285 static struct ep93xx_spi_chip_ops vision_spi_mmc_hw = {
 286         .setup          = vision_spi_mmc_hw_setup,
 287         .cleanup        = vision_spi_mmc_hw_cleanup,
 288         .cs_control     = vision_spi_mmc_hw_cs_control,
 289 };
 290
 291 /*************************************************************************
 292  * SPI Bus
 293  *************************************************************************/
 294 static struct spi_board_info vision_spi_board_info[] __initdata = {
 295         {
 296                 .modalias               = "cs4271",
 297                 .platform_data          = &vision_cs4271_data,
 298                 .controller_data        = &vision_cs4271_hw,
 299                 .max_speed_hz           = 6000000,
 300                 .bus_num                = 0,
 301                 .chip_select            = 0,
 302                 .mode                   = SPI_MODE_3,
 303         }, {
 304                 .modalias               = "sst25l",
 305                 .platform_data          = &vision_spi_flash_data,
 306                 .controller_data        = &vision_spi_flash_hw,
 307                 .max_speed_hz           = 20000000,
 308                 .bus_num                = 0,
 309                 .chip_select            = 1,
 310                 .mode                   = SPI_MODE_3,
 311         }, {
 312                 .modalias               = "mmc_spi",
 313                 .platform_data          = &vision_spi_mmc_data,
 314                 .controller_data        = &vision_spi_mmc_hw,
 315                 .max_speed_hz           = 20000000,
 316                 .bus_num                = 0,
 317                 .chip_select            = 2,
 318                 .mode                   = SPI_MODE_3,
 319         },
 320 };
 321
 322 static struct ep93xx_spi_info vision_spi_master __initdata = {
 323         .num_chipselect = ARRAY_SIZE(vision_spi_board_info),
 324         .use_dma        = 1,
 325 };
 326
 327 /*************************************************************************
 328  * I2S Audio
 329  *************************************************************************/
 330 static struct platform_device vision_audio_device = {
 331         .name           = "edb93xx-audio",
 332         .id             = -1,
 333 };
 334
 335 static void __init vision_register_i2s(void)
 336 {
 337         ep93xx_register_i2s();
 338         platform_device_register(&vision_audio_device);
 339 }
 340
 341 /*************************************************************************
 342  * Machine Initialization
 343  *************************************************************************/
 344 static void __init vision_init_machine(void)
 345 {
 346         ep93xx_init_devices();
 347         ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
 348         ep93xx_register_eth(&vision_eth_data, 1);
 349         ep93xx_register_fb(&ep93xxfb_info);
 350         ep93xx_register_pwm(1, 0);
 351
 352         /*
 353          * Request the gpio expander's interrupt gpio line now to prevent
 354          * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
 355          */
 356         if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
 357                                 "pca9539:74"))
 358                 pr_warn("cannot request interrupt gpio for pca9539:74\n");
 359
 360         vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
 361
 362         ep93xx_register_i2c(&vision_i2c_gpio_data, vision_i2c_info,
 363                                 ARRAY_SIZE(vision_i2c_info));
 364         ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
 365                                 ARRAY_SIZE(vision_spi_board_info));
 366         vision_register_i2s();
 367 }
 368
 369 MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
 370         /* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
 371         .atag_offset    = 0x100,
 372         .map_io         = vision_map_io,
 373         .init_irq       = ep93xx_init_irq,
 374         .init_time      = ep93xx_timer_init,
 375         .init_machine   = vision_init_machine,
 376         .init_late      = ep93xx_init_late,
 377         .restart        = ep93xx_restart,
 378 MACHINE_END