target/linux/xburst/patches-2.6.37/007-add-n526-board-support.patch

   1 From 5739f1348052000ed12a7745f7bafd352fff832a Mon Sep 17 00:00:00 2001
   2 From: Lars-Peter Clausen <lars@metafoo.de>
   3 Date: Sat, 24 Apr 2010 17:25:23 +0200
   4 Subject: [PATCH 07/23] Add n526 board support
   5
   6 ---
   7  arch/mips/jz4740/Kconfig      |    4 +
   8  arch/mips/jz4740/Makefile     |    1 +
   9  arch/mips/jz4740/board-n526.c |  318 +++++++++++++++++++++++++++++++++++++++++
  10  3 files changed, 323 insertions(+), 0 deletions(-)
  11  create mode 100644 arch/mips/jz4740/board-n526.c
  12
  13 --- a/arch/mips/jz4740/Kconfig
  14 +++ b/arch/mips/jz4740/Kconfig
  15 @@ -10,6 +10,10 @@ config JZ4740_N516
  16         bool "Hanvon n516 eBook reader"
  17         select SOC_JZ4740
  18
  19 +config JZ4740_N526
  20 +       bool "Hanvon n526 eBook reader"
  21 +       select SOC_JZ4740
  22 +
  23  endchoice
  24
  25  config HAVE_PWM
  26 --- a/arch/mips/jz4740/Makefile
  27 +++ b/arch/mips/jz4740/Makefile
  28 @@ -13,6 +13,7 @@ obj-$(CONFIG_DEBUG_FS) += clock-debugfs.
  29
  30  obj-$(CONFIG_JZ4740_QI_LB60)   += board-qi_lb60.o
  31  obj-$(CONFIG_JZ4740_N516)      += board-n516.o board-n516-display.o
  32 +obj-$(CONFIG_JZ4740_N526)      += board-n526.o
  33
  34  # PM support
  35
  36 --- /dev/null
  37 +++ b/arch/mips/jz4740/board-n526.c
  38 @@ -0,0 +1,320 @@
  39 +/*
  40 + *  Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
  41 + *     N526 eBook reader support
  42 + *
  43 + *  This program is free software; you can redistribute         it and/or modify it
  44 + *  under  the terms of         the GNU General  Public License as published by the
  45 + *  Free Software Foundation;  either version 2 of the License, or (at your
  46 + *  option) any later version.
  47 + *
  48 + *  You should have received a copy of the  GNU General Public License along
  49 + *  with this program; if not, write  to the Free Software Foundation, Inc.,
  50 + *  675 Mass Ave, Cambridge, MA 02139, USA.
  51 + *
  52 + */
  53 +
  54 +#include <linux/kernel.h>
  55 +#include <linux/init.h>
  56 +#include <linux/gpio.h>
  57 +
  58 +#include <linux/mutex.h>
  59 +#include <linux/wait.h>
  60 +#include <video/broadsheetfb.h>
  61 +#include <linux/delay.h>
  62 +#include <linux/interrupt.h>
  63 +
  64 +#include <linux/input.h>
  65 +#include <linux/gpio_keys.h>
  66 +
  67 +#include <linux/leds.h>
  68 +
  69 +#include <linux/i2c.h>
  70 +
  71 +#include "clock.h"
  72 +
  73 +#include <asm/mach-jz4740/jz4740_mmc.h>
  74 +#include <asm/mach-jz4740/jz4740_nand.h>
  75 +#include <asm/mach-jz4740/jz4740_fb.h>
  76 +
  77 +#include <asm/mach-jz4740/platform.h>
  78 +
  79 +/* NAND */
  80 +static struct nand_ecclayout n526_ecclayout = {
  81 +       .eccbytes = 36,
  82 +       .eccpos = {
  83 +               6,  7,  8,  9,  10, 11, 12, 13,
  84 +               14, 15, 16, 17, 18, 19, 20, 21,
  85 +               22, 23, 24, 25, 26, 27, 28, 29,
  86 +               30, 31, 32, 33, 34, 35, 36, 37,
  87 +               38, 39, 40, 41},
  88 +       .oobfree = {
  89 +               {
  90 +                       .offset = 2,
  91 +                       .length = 4,
  92 +               },
  93 +               {
  94 +                       .offset = 42,
  95 +                       .length = 22,
  96 +               },
  97 +       }
  98 +};
  99 +
 100 +static struct mtd_partition n526_partitions[] = {
 101 +       { .name = "NAND BOOT partition",
 102 +         .offset = 0 * 0x100000,
 103 +         .size = 4 * 0x100000,
 104 +       },
 105 +       { .name = "NAND KERNEL partition",
 106 +         .offset = 4 * 0x100000,
 107 +         .size = 4 * 0x100000,
 108 +       },
 109 +       { .name = "NAND ROOTFS partition",
 110 +         .offset = 16 * 0x100000,
 111 +         .size = 498 * 0x100000,
 112 +       },
 113 +};
 114 +
 115 +static struct jz_nand_platform_data n526_nand_pdata = {
 116 +       .ecc_layout = &n526_ecclayout,
 117 +       .partitions = n526_partitions,
 118 +       .num_partitions = ARRAY_SIZE(n526_partitions),
 119 +       .busy_gpio = JZ_GPIO_PORTC(30),
 120 +};
 121 +
 122 +static struct jz4740_mmc_platform_data n526_mmc_pdata = {
 123 +       .gpio_card_detect       = JZ_GPIO_PORTD(7),
 124 +       .card_detect_active_low = 1,
 125 +       .gpio_read_only         = -1,
 126 +       .gpio_power             = JZ_GPIO_PORTD(17),
 127 +       .power_active_low       = 1,
 128 +};
 129 +
 130 +static struct gpio_led n526_leds[] = {
 131 +       {
 132 +               .name = "n526:blue:power",
 133 +               .gpio = JZ_GPIO_PORTD(28),
 134 +               .default_state = LEDS_GPIO_DEFSTATE_ON,
 135 +       }
 136 +};
 137 +
 138 +static struct gpio_led_platform_data n526_leds_pdata = {
 139 +       .leds = n526_leds,
 140 +       .num_leds = ARRAY_SIZE(n526_leds),
 141 +};
 142 +
 143 +static struct platform_device n526_leds_device = {
 144 +       .name = "leds-gpio",
 145 +       .id = -1,
 146 +       .dev = {
 147 +               .platform_data = &n526_leds_pdata,
 148 +       },
 149 +};
 150 +
 151 +static void __init board_gpio_setup(void)
 152 +{
 153 +       /* We only need to enable/disable pullup here for pins used in generic
 154 +        * drivers. Everything else is done by the drivers themselfs. */
 155 +       jz_gpio_disable_pullup(JZ_GPIO_PORTD(17));
 156 +       jz_gpio_enable_pullup(JZ_GPIO_PORTD(7));
 157 +       jz_gpio_disable_pullup(JZ_GPIO_PORTC(19));
 158 +       jz_gpio_disable_pullup(JZ_GPIO_PORTC(20));
 159 +       jz_gpio_disable_pullup(JZ_GPIO_PORTC(21));
 160 +       jz_gpio_disable_pullup(JZ_GPIO_PORTC(23));
 161 +}
 162 +
 163 +
 164 +static const int n526_eink_ctrl_gpios[] = {
 165 +       0,
 166 +       JZ_GPIO_PORTC(23),
 167 +       JZ_GPIO_PORTC(19),
 168 +       JZ_GPIO_PORTC(20),
 169 +};
 170 +
 171 +static void n526_eink_set_ctl(struct broadsheetfb_par * par, unsigned char ctrl, u8
 172 +value)
 173 +{
 174 +       gpio_set_value(n526_eink_ctrl_gpios[ctrl], value);
 175 +}
 176 +
 177 +
 178 +static int n526_eink_wait(struct broadsheetfb_par *par)
 179 +{
 180 +       wait_event(par->waitq, gpio_get_value(JZ_GPIO_PORTB(17)));
 181 +
 182 +       return 0;
 183 +}
 184 +
 185 +static u16 n526_eink_get_hdb(struct broadsheetfb_par *par)
 186 +{
 187 +       u16 value = 0;
 188 +       jz_gpio_port_direction_input(JZ_GPIO_PORTC(0), 0xffff);
 189 +       gpio_set_value(JZ_GPIO_PORTC(21), 0);
 190 +       mdelay(100);
 191 +
 192 +       value = jz_gpio_port_get_value(JZ_GPIO_PORTC(0), 0xffff);
 193 +
 194 +       gpio_set_value(JZ_GPIO_PORTC(21), 1);
 195 +       jz_gpio_port_direction_output(JZ_GPIO_PORTC(0), 0xffff);
 196 +       return value;
 197 +}
 198 +
 199 +static void n526_eink_set_hdb(struct broadsheetfb_par *par, u16 value)
 200 +{
 201 +       jz_gpio_port_set_value(JZ_GPIO_PORTC(0), value, 0xffff);
 202 +}
 203 +
 204 +static int n526_eink_init(struct broadsheetfb_par *par)
 205 +{
 206 +       int i;
 207 +
 208 +       gpio_request(JZ_GPIO_PORTD(1), "display reset");
 209 +       gpio_direction_output(JZ_GPIO_PORTD(1), 1);
 210 +       mdelay(10);
 211 +       gpio_set_value(JZ_GPIO_PORTD(1), 0);
 212 +
 213 +       gpio_request(JZ_GPIO_PORTB(18), "eink enable");
 214 +       gpio_direction_output(JZ_GPIO_PORTB(18), 0);
 215 +
 216 +       gpio_request(JZ_GPIO_PORTB(29), "foobar");
 217 +       gpio_direction_output(JZ_GPIO_PORTB(29), 1);
 218 +
 219 +       for(i = 1; i < ARRAY_SIZE(n526_eink_ctrl_gpios); ++i) {
 220 +               gpio_request(n526_eink_ctrl_gpios[i], "eink display ctrl");
 221 +               gpio_direction_output(n526_eink_ctrl_gpios[i], 0);
 222 +       }
 223 +
 224 +       gpio_request(JZ_GPIO_PORTC(22), "foobar");
 225 +       gpio_direction_input(JZ_GPIO_PORTC(22));
 226 +       gpio_request(JZ_GPIO_PORTC(21), "eink nRD");
 227 +       gpio_direction_output(JZ_GPIO_PORTC(21), 1);
 228 +
 229 +       for(i = 0; i < 16; ++i) {
 230 +               gpio_request(JZ_GPIO_PORTC(i), "eink display data");
 231 +       }
 232 +       jz_gpio_port_direction_output(JZ_GPIO_PORTC(0), 0xffff);
 233 +
 234 +       gpio_set_value(JZ_GPIO_PORTB(18), 1);
 235 +
 236 +       return 0;
 237 +}
 238 +
 239 +static irqreturn_t n526_eink_busy_irq(int irq, void *devid)
 240 +{
 241 +       struct broadsheetfb_par *par = devid;
 242 +       wake_up(&par->waitq);
 243 +
 244 +       return IRQ_HANDLED;
 245 +}
 246 +
 247 +static int n526_eink_setup_irq(struct fb_info *info)
 248 +{
 249 +       int ret;
 250 +       struct broadsheetfb_par *par = info->par;
 251 +
 252 +       gpio_request(JZ_GPIO_PORTB(17), "eink busy");
 253 +       gpio_direction_input(JZ_GPIO_PORTB(17));
 254 +
 255 +       ret = request_irq(gpio_to_irq(JZ_GPIO_PORTB(17)), n526_eink_busy_irq,
 256 +                               IRQF_DISABLED | IRQF_TRIGGER_RISING,
 257 +                               "eink busyline", par);
 258 +       if (ret)
 259 +               printk("n526 display: Failed to request busyline irq: %d\n", ret);
 260 +       return 0;
 261 +}
 262 +
 263 +static void n526_eink_cleanup(struct broadsheetfb_par *par)
 264 +{
 265 +}
 266 +
 267 +static struct broadsheet_board broadsheet_pdata = {
 268 +       .owner = THIS_MODULE,
 269 +       .init = n526_eink_init,
 270 +       .wait_for_rdy = n526_eink_wait,
 271 +       .set_ctl = n526_eink_set_ctl,
 272 +       .set_hdb = n526_eink_set_hdb,
 273 +       .get_hdb = n526_eink_get_hdb,
 274 +       .cleanup = n526_eink_cleanup,
 275 +       .setup_irq = n526_eink_setup_irq,
 276 +};
 277 +
 278 +static struct platform_device n526_broadsheet_device = {
 279 +       .name = "broadsheetfb",
 280 +       .id = -1,
 281 +       .dev = {
 282 +               .platform_data = &broadsheet_pdata,
 283 +       },
 284 +};
 285 +
 286 +/* Buttons */
 287 +static struct gpio_keys_button n526_gpio_keys_buttons[] = {
 288 +       [0] = {
 289 +               .code           = KEY_ENTER,
 290 +               .gpio           = 0,
 291 +               .active_low     = 1,
 292 +               .desc           = "Power",
 293 +       },
 294 +};
 295 +
 296 +static struct gpio_keys_platform_data n526_gpio_keys_data = {
 297 +       .nbuttons = ARRAY_SIZE(n526_gpio_keys_buttons),
 298 +       .buttons = n526_gpio_keys_buttons,
 299 +};
 300 +
 301 +static struct platform_device n526_gpio_keys_device = {
 302 +       .name = "gpio-keys",
 303 +       .id =   -1,
 304 +       .dev = {
 305 +               .platform_data = &n526_gpio_keys_data,
 306 +       }
 307 +};
 308 +
 309 +static struct i2c_board_info n526_i2c_board_info = {
 310 +       .type = "n526-lpc",
 311 +       .addr = 0x54,
 312 +};
 313 +
 314 +static struct platform_device *n526_platform_devices[] __initdata = {
 315 +       &jz4740_usb_ohci_device,
 316 +       &jz4740_udc_device,
 317 +       &jz4740_mmc_device,
 318 +       &jz4740_nand_device,
 319 +       &jz4740_i2s_device,
 320 +       &jz4740_codec_device,
 321 +       &jz4740_pcm_device,
 322 +       &jz4740_rtc_device,
 323 +       &jz4740_i2c_device,
 324 +       &n526_leds_device,
 325 +       &n526_broadsheet_device,
 326 +       &n526_gpio_keys_device,
 327 +};
 328 +
 329 +static int __init n526_init_platform_devices(void)
 330 +{
 331 +       jz4740_nand_device.dev.platform_data = &n526_nand_pdata;
 332 +       jz4740_mmc_device.dev.platform_data = &n526_mmc_pdata;
 333 +
 334 +       jz4740_serial_device_register();
 335 +
 336 +       n526_i2c_board_info.irq = gpio_to_irq(JZ_GPIO_PORTD(14)),
 337 +       i2c_register_board_info(0, &n526_i2c_board_info, 1);
 338 +
 339 +       return platform_add_devices(n526_platform_devices,
 340 +                                       ARRAY_SIZE(n526_platform_devices));
 341 +
 342 +}
 343 +
 344 +struct jz4740_clock_board_data jz4740_clock_bdata = {
 345 +       .ext_rate = 12000000,
 346 +       .rtc_rate = 32768,
 347 +};
 348 +
 349 +static int __init n526_board_setup(void)
 350 +{
 351 +       board_gpio_setup();
 352 +
 353 +       if (n526_init_platform_devices())
 354 +               panic("Failed to initalize platform devices\n");
 355 +
 356 +       return 0;
 357 +}
 358 +arch_initcall(n526_board_setup);