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