target/linux/xburst/files-2.6.32/arch/mips/jz4740/board-n526.c

   1 /*
   2  *  Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
   3  *      N526 eBook reader support
   4  *
   5  *  This program is free software; you can redistribute  it and/or modify it
   6  *  under  the terms of  the GNU General  Public License as published by the
   7  *  Free Software Foundation;  either version 2 of the  License, or (at your
   8  *  option) any later version.
   9  *
  10  *  You should have received a copy of the  GNU General Public License along
  11  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  12  *  675 Mass Ave, Cambridge, MA 02139, USA.
  13  *
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/init.h>
  18 #include <linux/gpio.h>
  19
  20 #include <asm/mach-jz4740/platform.h>
  21
  22 #include <linux/mtd/jz4740_nand.h>
  23 #include <linux/jz4740_fb.h>
  24 #include <linux/power_supply.h>
  25 #include <linux/mmc/jz4740_mmc.h>
  26
  27 #include <video/broadsheetfb.h>
  28 #include <linux/delay.h>
  29 #include <linux/interrupt.h>
  30
  31 #include <linux/input.h>
  32 #include <linux/gpio_keys.h>
  33
  34 #include <linux/i2c.h>
  35 #include <linux/i2c-gpio.h>
  36
  37 #include "clock.h"
  38
  39 /* NAND */
  40 static struct nand_ecclayout n526_ecclayout = {
  41         .eccbytes = 36,
  42         .eccpos = {
  43                 6,  7,  8,  9,  10, 11, 12, 13,
  44                 14, 15, 16, 17, 18, 19, 20, 21,
  45                 22, 23, 24, 25, 26, 27, 28, 29,
  46                 30, 31, 32, 33, 34, 35, 36, 37,
  47                 38, 39, 40, 41},
  48         .oobfree = {
  49                 {.offset = 2,
  50                  .length = 4},
  51                 {.offset = 42,
  52                  .length = 22}}
  53 };
  54
  55 static struct mtd_partition n526_partitions[] = {
  56         { .name = "NAND BOOT partition",
  57           .offset = 0 * 0x100000,
  58           .size = 4 * 0x100000,
  59         },
  60         { .name = "NAND KERNEL partition",
  61           .offset = 4 * 0x100000,
  62           .size = 4 * 0x100000,
  63         },
  64         { .name = "NAND ROOTFS partition",
  65           .offset = 16 * 0x100000,
  66           .size = 498 * 0x100000,
  67         },
  68 };
  69
  70 static struct jz_nand_platform_data n526_nand_pdata = {
  71         .ecc_layout = &n526_ecclayout,
  72         .partitions = n526_partitions,
  73         .num_partitions = ARRAY_SIZE(n526_partitions),
  74         .busy_gpio = 94,
  75 };
  76
  77 static struct jz4740_mmc_platform_data n526_mmc_pdata = {
  78         .gpio_card_detect       = JZ_GPIO_PORTD(7),
  79         .card_detect_active_low = 1,
  80         .gpio_read_only         = -1,
  81         .gpio_power             = JZ_GPIO_PORTD(17),
  82         .power_active_low = 1,
  83 };
  84
  85 static struct gpio_led n526_leds[] = {
  86         {
  87                 .name = "n526:blue:power",
  88                 .gpio = JZ_GPIO_PORTD(28),
  89                 .default_state = LEDS_GPIO_DEFSTATE_ON,
  90         }
  91 };
  92
  93 static struct gpio_led_platform_data n526_leds_pdata = {
  94         .leds = n526_leds,
  95         .num_leds = ARRAY_SIZE(n526_leds),
  96 };
  97
  98 static struct platform_device n526_leds_device = {
  99         .name = "leds-gpio",
 100         .id = -1,
 101         .dev = {
 102                 .platform_data = &n526_leds_pdata,
 103         },
 104 };
 105
 106 static void __init board_gpio_setup(void)
 107 {
 108         /* We only need to enable/disable pullup here for pins used in generic
 109          * drivers. Everything else is done by the drivers themselfs. */
 110         jz_gpio_disable_pullup(JZ_GPIO_PORTD(17));
 111         jz_gpio_enable_pullup(JZ_GPIO_PORTD(7));
 112         jz_gpio_disable_pullup(JZ_GPIO_PORTC(19));
 113         jz_gpio_disable_pullup(JZ_GPIO_PORTC(20));
 114         jz_gpio_disable_pullup(JZ_GPIO_PORTC(21));
 115         jz_gpio_disable_pullup(JZ_GPIO_PORTC(23));
 116 }
 117
 118
 119 static const int n526_eink_ctrl_gpios[] = {
 120         0,
 121         JZ_GPIO_PORTC(23),
 122         JZ_GPIO_PORTC(19),
 123         JZ_GPIO_PORTC(20),
 124 };
 125
 126 static void n526_eink_set_ctl(struct broadsheetfb_par * par, unsigned char ctrl, u8
 127 value)
 128 {
 129         gpio_set_value(n526_eink_ctrl_gpios[ctrl], value);
 130 }
 131
 132
 133 static int n526_eink_wait(struct broadsheetfb_par *par)
 134 {
 135         wait_event(par->waitq, gpio_get_value(JZ_GPIO_PORTB(17)));
 136
 137         return 0;
 138 }
 139
 140 static u16 n526_eink_get_hdb(struct broadsheetfb_par *par)
 141 {
 142         u16 value = 0;
 143         jz_gpio_port_direction_input(JZ_GPIO_PORTC(0), 0xffff);
 144         gpio_set_value(JZ_GPIO_PORTC(21), 0);
 145         mdelay(100);
 146
 147         value = jz_gpio_port_get_value(JZ_GPIO_PORTC(0), 0xffff);
 148
 149         gpio_set_value(JZ_GPIO_PORTC(21), 1);
 150         jz_gpio_port_direction_output(JZ_GPIO_PORTC(0), 0xffff);
 151         return value;
 152 }
 153
 154 static void n526_eink_set_hdb(struct broadsheetfb_par *par, u16 value)
 155 {
 156         jz_gpio_port_set_value(JZ_GPIO_PORTC(0), value, 0xffff);
 157 }
 158
 159 static int n526_eink_init(struct broadsheetfb_par *par)
 160 {
 161         int i;
 162
 163         gpio_request(JZ_GPIO_PORTD(1), "display reset");
 164         gpio_direction_output(JZ_GPIO_PORTD(1), 1);
 165         mdelay(10);
 166         gpio_set_value(JZ_GPIO_PORTD(1), 0);
 167
 168         gpio_request(JZ_GPIO_PORTB(18), "eink enable");
 169         gpio_direction_output(JZ_GPIO_PORTB(18), 0);
 170
 171         gpio_request(JZ_GPIO_PORTB(29), "foobar");
 172         gpio_direction_output(JZ_GPIO_PORTB(29), 1);
 173
 174         for(i = 1; i < ARRAY_SIZE(n526_eink_ctrl_gpios); ++i) {
 175                 gpio_request(n526_eink_ctrl_gpios[i], "eink display ctrl");
 176                 gpio_direction_output(n526_eink_ctrl_gpios[i], 0);
 177         }
 178
 179         gpio_request(JZ_GPIO_PORTC(22), "foobar");
 180         gpio_direction_input(JZ_GPIO_PORTC(22));
 181         gpio_request(JZ_GPIO_PORTC(21), "eink nRD");
 182         gpio_direction_output(JZ_GPIO_PORTC(21), 1);
 183
 184         for(i = 0; i < 16; ++i) {
 185                 gpio_request(JZ_GPIO_PORTC(i), "eink display data");
 186         }
 187         jz_gpio_port_direction_output(JZ_GPIO_PORTC(0), 0xffff);
 188
 189         gpio_set_value(JZ_GPIO_PORTB(18), 1);
 190
 191         return 0;
 192 }
 193
 194 static irqreturn_t n526_eink_busy_irq(int irq, void *devid)
 195 {
 196         struct broadsheetfb_par *par = devid;
 197         wake_up(&par->waitq);
 198
 199         return IRQ_HANDLED;
 200 }
 201
 202 static int n526_eink_setup_irq(struct fb_info *info)
 203 {
 204         int ret;
 205         struct broadsheetfb_par *par = info->par;
 206
 207         gpio_request(JZ_GPIO_PORTB(17), "eink busy");
 208         gpio_direction_input(JZ_GPIO_PORTB(17));
 209
 210         ret = request_irq(gpio_to_irq(JZ_GPIO_PORTB(17)), n526_eink_busy_irq,
 211                                 IRQF_DISABLED | IRQF_TRIGGER_RISING,
 212                                 "eink busyline", par);
 213         if (ret)
 214                 printk("n526 display: Failed to request busyline irq: %d\n", ret);
 215         return 0;
 216 }
 217
 218 static void n526_eink_cleanup(struct broadsheetfb_par *par)
 219 {
 220 }
 221
 222 static struct broadsheet_board broadsheet_pdata = {
 223         .owner = THIS_MODULE,
 224         .init = n526_eink_init,
 225         .wait_for_rdy = n526_eink_wait,
 226         .set_ctl = n526_eink_set_ctl,
 227         .set_hdb = n526_eink_set_hdb,
 228         .get_hdb = n526_eink_get_hdb,
 229         .cleanup = n526_eink_cleanup,
 230         .setup_irq = n526_eink_setup_irq,
 231 };
 232
 233 static struct platform_device n526_broadsheet_device = {
 234         .name = "broadsheetfb",
 235         .id = -1,
 236         .dev = {
 237                 .platform_data = &broadsheet_pdata,
 238         },
 239 };
 240
 241 static struct gpio_keys_button qi_lb60_gpio_keys_buttons[] = {
 242         [0] = {
 243                 .code           = KEY_ENTER,
 244                 .gpio           = 0,
 245                 .active_low     = 1,
 246                 .desc           = "Power",
 247         },
 248 };
 249
 250 static struct gpio_keys_platform_data qi_lb60_gpio_keys_data = {
 251         .nbuttons = ARRAY_SIZE(qi_lb60_gpio_keys_buttons),
 252         .buttons = qi_lb60_gpio_keys_buttons,
 253 };
 254
 255 static struct platform_device qi_lb60_gpio_keys = {
 256         .name = "gpio-keys",
 257         .id =   -1,
 258         .dev = {
 259                 .platform_data = &qi_lb60_gpio_keys_data,
 260         }
 261 };
 262
 263 static struct i2c_gpio_platform_data n526_i2c_pdata = {
 264         .sda_pin = JZ_GPIO_PORTD(23),
 265         .scl_pin = JZ_GPIO_PORTD(24),
 266         .udelay = 2,
 267         .timeout = 3 * HZ,
 268 };
 269
 270 static struct platform_device n526_i2c_device = {
 271         .name = "i2c-gpio",
 272         .id = -1,
 273         .dev = {
 274                 .platform_data = &n526_i2c_pdata,
 275         },
 276 };
 277
 278 static struct i2c_board_info n526_i2c_board_info = {
 279         .type = "n526-lpc",
 280         .addr = 0x54,
 281 };
 282
 283 static struct platform_device *jz_platform_devices[] __initdata = {
 284         &jz4740_usb_ohci_device,
 285         &jz4740_usb_gdt_device,
 286         &jz4740_mmc_device,
 287         &jz4740_nand_device,
 288         &jz4740_i2s_device,
 289         &jz4740_codec_device,
 290         &jz4740_rtc_device,
 291         &n526_leds_device,
 292         &n526_broadsheet_device,
 293         &qi_lb60_gpio_keys,
 294         &n526_i2c_device,
 295 };
 296
 297
 298 static int __init n526_init_platform_devices(void)
 299 {
 300
 301         jz4740_nand_device.dev.platform_data = &n526_nand_pdata;
 302         jz4740_mmc_device.dev.platform_data = &n526_mmc_pdata;
 303
 304         n526_i2c_board_info.irq = gpio_to_irq(JZ_GPIO_PORTD(14)),
 305         i2c_register_board_info(0, &n526_i2c_board_info, 1);
 306
 307         return platform_add_devices(jz_platform_devices,
 308                                         ARRAY_SIZE(jz_platform_devices));
 309
 310 }
 311
 312 struct jz4740_clock_board_data jz4740_clock_bdata = {
 313         .ext_rate = 12000000,
 314         .rtc_rate = 32768,
 315 };
 316
 317 extern int jz_gpiolib_init(void);
 318
 319 static int __init n526_board_setup(void)
 320 {
 321         if (jz_gpiolib_init())
 322                 panic("Failed to initalize jz gpio\n");
 323
 324         jz4740_clock_init();
 325         board_gpio_setup();
 326
 327         if (n526_init_platform_devices())
 328                 panic("Failed to initalize platform devices\n");
 329
 330         return 0;
 331 }
 332
 333 arch_initcall(n526_board_setup);