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 <mach/fb.h>
  34 #include <mach/ep93xx_spi.h>
  35
  36 #include <asm/mach-types.h>
  37 #include <asm/mach/map.h>
  38 #include <asm/mach/arch.h>
  39
  40 /*************************************************************************
  41  * Static I/O mappings for the FPGA
  42  *************************************************************************/
  43 #define VISION_PHYS_BASE        EP93XX_CS7_PHYS_BASE
  44 #define VISION_VIRT_BASE        0xfebff000
  45
  46 static struct map_desc vision_io_desc[] __initdata = {
  47         {
  48                 .virtual        = VISION_VIRT_BASE,
  49                 .pfn            = __phys_to_pfn(VISION_PHYS_BASE),
  50                 .length         = SZ_4K,
  51                 .type           = MT_DEVICE,
  52         },
  53 };
  54
  55 static void __init vision_map_io(void)
  56 {
  57         ep93xx_map_io();
  58
  59         iotable_init(vision_io_desc, ARRAY_SIZE(vision_io_desc));
  60 }
  61
  62 /*************************************************************************
  63  * Ethernet
  64  *************************************************************************/
  65 static struct ep93xx_eth_data vision_eth_data __initdata = {
  66         .phy_id         = 1,
  67 };
  68
  69 /*************************************************************************
  70  * Framebuffer
  71  *************************************************************************/
  72 #define VISION_LCD_ENABLE       EP93XX_GPIO_LINE_EGPIO1
  73
  74 static int vision_lcd_setup(struct platform_device *pdev)
  75 {
  76         int err;
  77
  78         err = gpio_request_one(VISION_LCD_ENABLE, GPIOF_INIT_HIGH,
  79                                 dev_name(&pdev->dev));
  80         if (err)
  81                 return err;
  82
  83         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_RAS |
  84                                  EP93XX_SYSCON_DEVCFG_RASONP3 |
  85                                  EP93XX_SYSCON_DEVCFG_EXVC);
  86
  87         return 0;
  88 }
  89
  90 static void vision_lcd_teardown(struct platform_device *pdev)
  91 {
  92         gpio_free(VISION_LCD_ENABLE);
  93 }
  94
  95 static void vision_lcd_blank(int blank_mode, struct fb_info *info)
  96 {
  97         if (blank_mode)
  98                 gpio_set_value(VISION_LCD_ENABLE, 0);
  99         else
 100                 gpio_set_value(VISION_LCD_ENABLE, 1);
 101 }
 102
 103 static struct ep93xxfb_mach_info ep93xxfb_info __initdata = {
 104         .num_modes      = EP93XXFB_USE_MODEDB,
 105         .bpp            = 16,
 106         .flags          = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
 107         .setup          = vision_lcd_setup,
 108         .teardown       = vision_lcd_teardown,
 109         .blank          = vision_lcd_blank,
 110 };
 111
 112
 113 /*************************************************************************
 114  * GPIO Expanders
 115  *************************************************************************/
 116 #define PCA9539_74_GPIO_BASE    (EP93XX_GPIO_LINE_MAX + 1)
 117 #define PCA9539_75_GPIO_BASE    (PCA9539_74_GPIO_BASE + 16)
 118 #define PCA9539_76_GPIO_BASE    (PCA9539_75_GPIO_BASE + 16)
 119 #define PCA9539_77_GPIO_BASE    (PCA9539_76_GPIO_BASE + 16)
 120
 121 static struct pca953x_platform_data pca953x_74_gpio_data = {
 122         .gpio_base      = PCA9539_74_GPIO_BASE,
 123         .irq_base       = EP93XX_BOARD_IRQ(0),
 124 };
 125
 126 static struct pca953x_platform_data pca953x_75_gpio_data = {
 127         .gpio_base      = PCA9539_75_GPIO_BASE,
 128         .irq_base       = -1,
 129 };
 130
 131 static struct pca953x_platform_data pca953x_76_gpio_data = {
 132         .gpio_base      = PCA9539_76_GPIO_BASE,
 133         .irq_base       = -1,
 134 };
 135
 136 static struct pca953x_platform_data pca953x_77_gpio_data = {
 137         .gpio_base      = PCA9539_77_GPIO_BASE,
 138         .irq_base       = -1,
 139 };
 140
 141 /*************************************************************************
 142  * I2C Bus
 143  *************************************************************************/
 144 static struct i2c_gpio_platform_data vision_i2c_gpio_data __initdata = {
 145         .sda_pin                = EP93XX_GPIO_LINE_EEDAT,
 146         .scl_pin                = EP93XX_GPIO_LINE_EECLK,
 147 };
 148
 149 static struct i2c_board_info vision_i2c_info[] __initdata = {
 150         {
 151                 I2C_BOARD_INFO("isl1208", 0x6f),
 152                 .irq            = IRQ_EP93XX_EXT1,
 153         }, {
 154                 I2C_BOARD_INFO("pca9539", 0x74),
 155                 .platform_data  = &pca953x_74_gpio_data,
 156                 .irq            = gpio_to_irq(EP93XX_GPIO_LINE_F(7)),
 157         }, {
 158                 I2C_BOARD_INFO("pca9539", 0x75),
 159                 .platform_data  = &pca953x_75_gpio_data,
 160         }, {
 161                 I2C_BOARD_INFO("pca9539", 0x76),
 162                 .platform_data  = &pca953x_76_gpio_data,
 163         }, {
 164                 I2C_BOARD_INFO("pca9539", 0x77),
 165                 .platform_data  = &pca953x_77_gpio_data,
 166         },
 167 };
 168
 169 /*************************************************************************
 170  * SPI Flash
 171  *************************************************************************/
 172 #define VISION_SPI_FLASH_CS     EP93XX_GPIO_LINE_EGPIO7
 173
 174 static struct mtd_partition vision_spi_flash_partitions[] = {
 175         {
 176                 .name   = "SPI bootstrap",
 177                 .offset = 0,
 178                 .size   = SZ_4K,
 179         }, {
 180                 .name   = "Bootstrap config",
 181                 .offset = MTDPART_OFS_APPEND,
 182                 .size   = SZ_4K,
 183         }, {
 184                 .name   = "System config",
 185                 .offset = MTDPART_OFS_APPEND,
 186                 .size   = MTDPART_SIZ_FULL,
 187         },
 188 };
 189
 190 static struct flash_platform_data vision_spi_flash_data = {
 191         .name           = "SPI Flash",
 192         .parts          = vision_spi_flash_partitions,
 193         .nr_parts       = ARRAY_SIZE(vision_spi_flash_partitions),
 194 };
 195
 196 static int vision_spi_flash_hw_setup(struct spi_device *spi)
 197 {
 198         return gpio_request_one(VISION_SPI_FLASH_CS, GPIOF_INIT_HIGH,
 199                                 spi->modalias);
 200 }
 201
 202 static void vision_spi_flash_hw_cleanup(struct spi_device *spi)
 203 {
 204         gpio_free(VISION_SPI_FLASH_CS);
 205 }
 206
 207 static void vision_spi_flash_hw_cs_control(struct spi_device *spi, int value)
 208 {
 209         gpio_set_value(VISION_SPI_FLASH_CS, value);
 210 }
 211
 212 static struct ep93xx_spi_chip_ops vision_spi_flash_hw = {
 213         .setup          = vision_spi_flash_hw_setup,
 214         .cleanup        = vision_spi_flash_hw_cleanup,
 215         .cs_control     = vision_spi_flash_hw_cs_control,
 216 };
 217
 218 /*************************************************************************
 219  * SPI SD/MMC host
 220  *************************************************************************/
 221 #define VISION_SPI_MMC_CS       EP93XX_GPIO_LINE_G(2)
 222 #define VISION_SPI_MMC_WP       EP93XX_GPIO_LINE_F(0)
 223 #define VISION_SPI_MMC_CD       EP93XX_GPIO_LINE_EGPIO15
 224
 225 static struct gpio vision_spi_mmc_gpios[] = {
 226         { VISION_SPI_MMC_WP, GPIOF_DIR_IN, "mmc_spi:wp" },
 227         { VISION_SPI_MMC_CD, GPIOF_DIR_IN, "mmc_spi:cd" },
 228 };
 229
 230 static int vision_spi_mmc_init(struct device *pdev,
 231                         irqreturn_t (*func)(int, void *), void *pdata)
 232 {
 233         int err;
 234
 235         err = gpio_request_array(vision_spi_mmc_gpios,
 236                                  ARRAY_SIZE(vision_spi_mmc_gpios));
 237         if (err)
 238                 return err;
 239
 240         err = gpio_set_debounce(VISION_SPI_MMC_CD, 1);
 241         if (err)
 242                 goto exit_err;
 243
 244         err = request_irq(gpio_to_irq(VISION_SPI_MMC_CD), func,
 245                         IRQ_TYPE_EDGE_BOTH, "mmc_spi:cd", pdata);
 246         if (err)
 247                 goto exit_err;
 248
 249         return 0;
 250
 251 exit_err:
 252         gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
 253         return err;
 254
 255 }
 256
 257 static void vision_spi_mmc_exit(struct device *pdev, void *pdata)
 258 {
 259         free_irq(gpio_to_irq(VISION_SPI_MMC_CD), pdata);
 260         gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
 261 }
 262
 263 static int vision_spi_mmc_get_ro(struct device *pdev)
 264 {
 265         return !!gpio_get_value(VISION_SPI_MMC_WP);
 266 }
 267
 268 static int vision_spi_mmc_get_cd(struct device *pdev)
 269 {
 270         return !gpio_get_value(VISION_SPI_MMC_CD);
 271 }
 272
 273 static struct mmc_spi_platform_data vision_spi_mmc_data = {
 274         .init           = vision_spi_mmc_init,
 275         .exit           = vision_spi_mmc_exit,
 276         .get_ro         = vision_spi_mmc_get_ro,
 277         .get_cd         = vision_spi_mmc_get_cd,
 278         .detect_delay   = 100,
 279         .powerup_msecs  = 100,
 280         .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
 281 };
 282
 283 static int vision_spi_mmc_hw_setup(struct spi_device *spi)
 284 {
 285         return gpio_request_one(VISION_SPI_MMC_CS, GPIOF_INIT_HIGH,
 286                                 spi->modalias);
 287 }
 288
 289 static void vision_spi_mmc_hw_cleanup(struct spi_device *spi)
 290 {
 291         gpio_free(VISION_SPI_MMC_CS);
 292 }
 293
 294 static void vision_spi_mmc_hw_cs_control(struct spi_device *spi, int value)
 295 {
 296         gpio_set_value(VISION_SPI_MMC_CS, value);
 297 }
 298
 299 static struct ep93xx_spi_chip_ops vision_spi_mmc_hw = {
 300         .setup          = vision_spi_mmc_hw_setup,
 301         .cleanup        = vision_spi_mmc_hw_cleanup,
 302         .cs_control     = vision_spi_mmc_hw_cs_control,
 303 };
 304
 305 /*************************************************************************
 306  * SPI Bus
 307  *************************************************************************/
 308 static struct spi_board_info vision_spi_board_info[] __initdata = {
 309         {
 310                 .modalias               = "sst25l",
 311                 .platform_data          = &vision_spi_flash_data,
 312                 .controller_data        = &vision_spi_flash_hw,
 313                 .max_speed_hz           = 20000000,
 314                 .bus_num                = 0,
 315                 .chip_select            = 0,
 316                 .mode                   = SPI_MODE_3,
 317         }, {
 318                 .modalias               = "mmc_spi",
 319                 .platform_data          = &vision_spi_mmc_data,
 320                 .controller_data        = &vision_spi_mmc_hw,
 321                 .max_speed_hz           = 20000000,
 322                 .bus_num                = 0,
 323                 .chip_select            = 1,
 324                 .mode                   = SPI_MODE_3,
 325         },
 326 };
 327
 328 static struct ep93xx_spi_info vision_spi_master __initdata = {
 329         .num_chipselect         = ARRAY_SIZE(vision_spi_board_info),
 330 };
 331
 332 /*************************************************************************
 333  * Machine Initialization
 334  *************************************************************************/
 335 static void __init vision_init_machine(void)
 336 {
 337         ep93xx_init_devices();
 338         ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
 339         ep93xx_register_eth(&vision_eth_data, 1);
 340         ep93xx_register_fb(&ep93xxfb_info);
 341         ep93xx_register_pwm(1, 0);
 342
 343         /*
 344          * Request the gpio expander's interrupt gpio line now to prevent
 345          * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
 346          */
 347         if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
 348                                 "pca9539:74"))
 349                 pr_warn("cannot request interrupt gpio for pca9539:74\n");
 350
 351         ep93xx_register_i2c(&vision_i2c_gpio_data, vision_i2c_info,
 352                                 ARRAY_SIZE(vision_i2c_info));
 353         ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
 354                                 ARRAY_SIZE(vision_spi_board_info));
 355 }
 356
 357 MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
 358         /* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
 359         .atag_offset    = 0x100,
 360         .map_io         = vision_map_io,
 361         .init_irq       = ep93xx_init_irq,
 362         .timer          = &ep93xx_timer,
 363         .init_machine   = vision_init_machine,
 364 MACHINE_END