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 #include <mach/gpio-ep93xx.h>
  36
  37 #include <asm/hardware/vic.h>
  38 #include <asm/mach-types.h>
  39 #include <asm/mach/map.h>
  40 #include <asm/mach/arch.h>
  41
  42 /*************************************************************************
  43  * Static I/O mappings for the FPGA
  44  *************************************************************************/
  45 #define VISION_PHYS_BASE        EP93XX_CS7_PHYS_BASE
  46 #define VISION_VIRT_BASE        0xfebff000
  47
  48 static struct map_desc vision_io_desc[] __initdata = {
  49         {
  50                 .virtual        = VISION_VIRT_BASE,
  51                 .pfn            = __phys_to_pfn(VISION_PHYS_BASE),
  52                 .length         = SZ_4K,
  53                 .type           = MT_DEVICE,
  54         },
  55 };
  56
  57 static void __init vision_map_io(void)
  58 {
  59         ep93xx_map_io();
  60
  61         iotable_init(vision_io_desc, ARRAY_SIZE(vision_io_desc));
  62 }
  63
  64 /*************************************************************************
  65  * Ethernet
  66  *************************************************************************/
  67 static struct ep93xx_eth_data vision_eth_data __initdata = {
  68         .phy_id         = 1,
  69 };
  70
  71 /*************************************************************************
  72  * Framebuffer
  73  *************************************************************************/
  74 #define VISION_LCD_ENABLE       EP93XX_GPIO_LINE_EGPIO1
  75
  76 static int vision_lcd_setup(struct platform_device *pdev)
  77 {
  78         int err;
  79
  80         err = gpio_request_one(VISION_LCD_ENABLE, GPIOF_INIT_HIGH,
  81                                 dev_name(&pdev->dev));
  82         if (err)
  83                 return err;
  84
  85         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_RAS |
  86                                  EP93XX_SYSCON_DEVCFG_RASONP3 |
  87                                  EP93XX_SYSCON_DEVCFG_EXVC);
  88
  89         return 0;
  90 }
  91
  92 static void vision_lcd_teardown(struct platform_device *pdev)
  93 {
  94         gpio_free(VISION_LCD_ENABLE);
  95 }
  96
  97 static void vision_lcd_blank(int blank_mode, struct fb_info *info)
  98 {
  99         if (blank_mode)
 100                 gpio_set_value(VISION_LCD_ENABLE, 0);
 101         else
 102                 gpio_set_value(VISION_LCD_ENABLE, 1);
 103 }
 104
 105 static struct ep93xxfb_mach_info ep93xxfb_info __initdata = {
 106         .num_modes      = EP93XXFB_USE_MODEDB,
 107         .bpp            = 16,
 108         .flags          = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
 109         .setup          = vision_lcd_setup,
 110         .teardown       = vision_lcd_teardown,
 111         .blank          = vision_lcd_blank,
 112 };
 113
 114
 115 /*************************************************************************
 116  * GPIO Expanders
 117  *************************************************************************/
 118 #define PCA9539_74_GPIO_BASE    (EP93XX_GPIO_LINE_MAX + 1)
 119 #define PCA9539_75_GPIO_BASE    (PCA9539_74_GPIO_BASE + 16)
 120 #define PCA9539_76_GPIO_BASE    (PCA9539_75_GPIO_BASE + 16)
 121 #define PCA9539_77_GPIO_BASE    (PCA9539_76_GPIO_BASE + 16)
 122
 123 static struct pca953x_platform_data pca953x_74_gpio_data = {
 124         .gpio_base      = PCA9539_74_GPIO_BASE,
 125         .irq_base       = EP93XX_BOARD_IRQ(0),
 126 };
 127
 128 static struct pca953x_platform_data pca953x_75_gpio_data = {
 129         .gpio_base      = PCA9539_75_GPIO_BASE,
 130         .irq_base       = -1,
 131 };
 132
 133 static struct pca953x_platform_data pca953x_76_gpio_data = {
 134         .gpio_base      = PCA9539_76_GPIO_BASE,
 135         .irq_base       = -1,
 136 };
 137
 138 static struct pca953x_platform_data pca953x_77_gpio_data = {
 139         .gpio_base      = PCA9539_77_GPIO_BASE,
 140         .irq_base       = -1,
 141 };
 142
 143 /*************************************************************************
 144  * I2C Bus
 145  *************************************************************************/
 146 static struct i2c_gpio_platform_data vision_i2c_gpio_data __initdata = {
 147         .sda_pin                = EP93XX_GPIO_LINE_EEDAT,
 148         .scl_pin                = EP93XX_GPIO_LINE_EECLK,
 149 };
 150
 151 static struct i2c_board_info vision_i2c_info[] __initdata = {
 152         {
 153                 I2C_BOARD_INFO("isl1208", 0x6f),
 154                 .irq            = IRQ_EP93XX_EXT1,
 155         }, {
 156                 I2C_BOARD_INFO("pca9539", 0x74),
 157                 .platform_data  = &pca953x_74_gpio_data,
 158         }, {
 159                 I2C_BOARD_INFO("pca9539", 0x75),
 160                 .platform_data  = &pca953x_75_gpio_data,
 161         }, {
 162                 I2C_BOARD_INFO("pca9539", 0x76),
 163                 .platform_data  = &pca953x_76_gpio_data,
 164         }, {
 165                 I2C_BOARD_INFO("pca9539", 0x77),
 166                 .platform_data  = &pca953x_77_gpio_data,
 167         },
 168 };
 169
 170 /*************************************************************************
 171  * SPI Flash
 172  *************************************************************************/
 173 #define VISION_SPI_FLASH_CS     EP93XX_GPIO_LINE_EGPIO7
 174
 175 static struct mtd_partition vision_spi_flash_partitions[] = {
 176         {
 177                 .name   = "SPI bootstrap",
 178                 .offset = 0,
 179                 .size   = SZ_4K,
 180         }, {
 181                 .name   = "Bootstrap config",
 182                 .offset = MTDPART_OFS_APPEND,
 183                 .size   = SZ_4K,
 184         }, {
 185                 .name   = "System config",
 186                 .offset = MTDPART_OFS_APPEND,
 187                 .size   = MTDPART_SIZ_FULL,
 188         },
 189 };
 190
 191 static struct flash_platform_data vision_spi_flash_data = {
 192         .name           = "SPI Flash",
 193         .parts          = vision_spi_flash_partitions,
 194         .nr_parts       = ARRAY_SIZE(vision_spi_flash_partitions),
 195 };
 196
 197 static int vision_spi_flash_hw_setup(struct spi_device *spi)
 198 {
 199         return gpio_request_one(VISION_SPI_FLASH_CS, GPIOF_INIT_HIGH,
 200                                 spi->modalias);
 201 }
 202
 203 static void vision_spi_flash_hw_cleanup(struct spi_device *spi)
 204 {
 205         gpio_free(VISION_SPI_FLASH_CS);
 206 }
 207
 208 static void vision_spi_flash_hw_cs_control(struct spi_device *spi, int value)
 209 {
 210         gpio_set_value(VISION_SPI_FLASH_CS, value);
 211 }
 212
 213 static struct ep93xx_spi_chip_ops vision_spi_flash_hw = {
 214         .setup          = vision_spi_flash_hw_setup,
 215         .cleanup        = vision_spi_flash_hw_cleanup,
 216         .cs_control     = vision_spi_flash_hw_cs_control,
 217 };
 218
 219 /*************************************************************************
 220  * SPI SD/MMC host
 221  *************************************************************************/
 222 #define VISION_SPI_MMC_CS       EP93XX_GPIO_LINE_G(2)
 223 #define VISION_SPI_MMC_WP       EP93XX_GPIO_LINE_F(0)
 224 #define VISION_SPI_MMC_CD       EP93XX_GPIO_LINE_EGPIO15
 225
 226 static struct gpio vision_spi_mmc_gpios[] = {
 227         { VISION_SPI_MMC_WP, GPIOF_DIR_IN, "mmc_spi:wp" },
 228         { VISION_SPI_MMC_CD, GPIOF_DIR_IN, "mmc_spi:cd" },
 229 };
 230
 231 static int vision_spi_mmc_init(struct device *pdev,
 232                         irqreturn_t (*func)(int, void *), void *pdata)
 233 {
 234         int err;
 235
 236         err = gpio_request_array(vision_spi_mmc_gpios,
 237                                  ARRAY_SIZE(vision_spi_mmc_gpios));
 238         if (err)
 239                 return err;
 240
 241         err = gpio_set_debounce(VISION_SPI_MMC_CD, 1);
 242         if (err)
 243                 goto exit_err;
 244
 245         err = request_irq(gpio_to_irq(VISION_SPI_MMC_CD), func,
 246                         IRQ_TYPE_EDGE_BOTH, "mmc_spi:cd", pdata);
 247         if (err)
 248                 goto exit_err;
 249
 250         return 0;
 251
 252 exit_err:
 253         gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
 254         return err;
 255
 256 }
 257
 258 static void vision_spi_mmc_exit(struct device *pdev, void *pdata)
 259 {
 260         free_irq(gpio_to_irq(VISION_SPI_MMC_CD), pdata);
 261         gpio_free_array(vision_spi_mmc_gpios, ARRAY_SIZE(vision_spi_mmc_gpios));
 262 }
 263
 264 static int vision_spi_mmc_get_ro(struct device *pdev)
 265 {
 266         return !!gpio_get_value(VISION_SPI_MMC_WP);
 267 }
 268
 269 static int vision_spi_mmc_get_cd(struct device *pdev)
 270 {
 271         return !gpio_get_value(VISION_SPI_MMC_CD);
 272 }
 273
 274 static struct mmc_spi_platform_data vision_spi_mmc_data = {
 275         .init           = vision_spi_mmc_init,
 276         .exit           = vision_spi_mmc_exit,
 277         .get_ro         = vision_spi_mmc_get_ro,
 278         .get_cd         = vision_spi_mmc_get_cd,
 279         .detect_delay   = 100,
 280         .powerup_msecs  = 100,
 281         .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
 282 };
 283
 284 static int vision_spi_mmc_hw_setup(struct spi_device *spi)
 285 {
 286         return gpio_request_one(VISION_SPI_MMC_CS, GPIOF_INIT_HIGH,
 287                                 spi->modalias);
 288 }
 289
 290 static void vision_spi_mmc_hw_cleanup(struct spi_device *spi)
 291 {
 292         gpio_free(VISION_SPI_MMC_CS);
 293 }
 294
 295 static void vision_spi_mmc_hw_cs_control(struct spi_device *spi, int value)
 296 {
 297         gpio_set_value(VISION_SPI_MMC_CS, value);
 298 }
 299
 300 static struct ep93xx_spi_chip_ops vision_spi_mmc_hw = {
 301         .setup          = vision_spi_mmc_hw_setup,
 302         .cleanup        = vision_spi_mmc_hw_cleanup,
 303         .cs_control     = vision_spi_mmc_hw_cs_control,
 304 };
 305
 306 /*************************************************************************
 307  * SPI Bus
 308  *************************************************************************/
 309 static struct spi_board_info vision_spi_board_info[] __initdata = {
 310         {
 311                 .modalias               = "sst25l",
 312                 .platform_data          = &vision_spi_flash_data,
 313                 .controller_data        = &vision_spi_flash_hw,
 314                 .max_speed_hz           = 20000000,
 315                 .bus_num                = 0,
 316                 .chip_select            = 0,
 317                 .mode                   = SPI_MODE_3,
 318         }, {
 319                 .modalias               = "mmc_spi",
 320                 .platform_data          = &vision_spi_mmc_data,
 321                 .controller_data        = &vision_spi_mmc_hw,
 322                 .max_speed_hz           = 20000000,
 323                 .bus_num                = 0,
 324                 .chip_select            = 1,
 325                 .mode                   = SPI_MODE_3,
 326         },
 327 };
 328
 329 static struct ep93xx_spi_info vision_spi_master __initdata = {
 330         .num_chipselect         = ARRAY_SIZE(vision_spi_board_info),
 331 };
 332
 333 /*************************************************************************
 334  * Machine Initialization
 335  *************************************************************************/
 336 static void __init vision_init_machine(void)
 337 {
 338         ep93xx_init_devices();
 339         ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
 340         ep93xx_register_eth(&vision_eth_data, 1);
 341         ep93xx_register_fb(&ep93xxfb_info);
 342         ep93xx_register_pwm(1, 0);
 343
 344         /*
 345          * Request the gpio expander's interrupt gpio line now to prevent
 346          * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
 347          */
 348         if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
 349                                 "pca9539:74"))
 350                 pr_warn("cannot request interrupt gpio for pca9539:74\n");
 351
 352         vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
 353
 354         ep93xx_register_i2c(&vision_i2c_gpio_data, vision_i2c_info,
 355                                 ARRAY_SIZE(vision_i2c_info));
 356         ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
 357                                 ARRAY_SIZE(vision_spi_board_info));
 358 }
 359
 360 MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
 361         /* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
 362         .atag_offset    = 0x100,
 363         .map_io         = vision_map_io,
 364         .init_irq       = ep93xx_init_irq,
 365         .handle_irq     = vic_handle_irq,
 366         .timer          = &ep93xx_timer,
 367         .init_machine   = vision_init_machine,
 368         .restart        = ep93xx_restart,
 369 MACHINE_END