arch/arm/mach-omap2/board-n800-mmc.c

   1 /*
   2  * linux/arch/arm/mach-omap2/board-n800-mmc.c
   3  *
   4  * Copyright (C) 2006 Nokia Corporation
   5  * Author: Juha Yrjola
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <asm/arch/mmc.h>
  13 #include <asm/arch/menelaus.h>
  14 #include <asm/arch/gpio.h>
  15
  16 #include <asm/mach-types.h>
  17 #include <linux/delay.h>
  18
  19 #ifdef CONFIG_MMC_OMAP
  20
  21 static const int slot_switch_gpio = 96;
  22
  23 static const int n810_slot2_pw_vddf = 23;
  24 static const int n810_slot2_pw_vdd = 9;
  25
  26 static int slot1_cover_open;
  27 static int slot2_cover_open;
  28 static struct device *mmc_device;
  29
  30 /*
  31  * VMMC   --> slot 1 (N800 & N810)
  32  * VDCDC3_APE, VMCS2_APE --> slot 2 on N800
  33  * GPIO96 --> Menelaus GPIO2
  34  * GPIO23 --> controls slot2 VSD    (N810 only)
  35  * GPIO9  --> controls slot2 VIO_SD (N810 only)
  36  */
  37
  38 static int n800_mmc_switch_slot(struct device *dev, int slot)
  39 {
  40 #ifdef CONFIG_MMC_DEBUG
  41         dev_dbg(dev, "Choose slot %d\n", slot + 1);
  42 #endif
  43         if (slot == 0)
  44                 omap_set_gpio_dataout(slot_switch_gpio, 0);
  45         else
  46                 omap_set_gpio_dataout(slot_switch_gpio, 1);
  47         return 0;
  48 }
  49
  50 static int n800_mmc_set_power_menelaus(struct device *dev, int slot,
  51                                         int power_on, int vdd)
  52 {
  53         int mV;
  54
  55 #ifdef CONFIG_MMC_DEBUG
  56         dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
  57                 power_on ? "on" : "off", vdd);
  58 #endif
  59         if (slot == 0) {
  60                 if (!power_on)
  61                         return menelaus_set_vmmc(0);
  62                 switch (1 << vdd) {
  63                 case MMC_VDD_33_34:
  64                 case MMC_VDD_32_33:
  65                 case MMC_VDD_31_32:
  66                         mV = 3100;
  67                         break;
  68                 case MMC_VDD_30_31:
  69                         mV = 3000;
  70                         break;
  71                 case MMC_VDD_28_29:
  72                         mV = 2800;
  73                         break;
  74                 case MMC_VDD_165_195:
  75                         mV = 1850;
  76                         break;
  77                 default:
  78                         BUG();
  79                 }
  80                 return menelaus_set_vmmc(mV);
  81         } else {
  82                 if (!power_on)
  83                         return menelaus_set_vdcdc(3, 0);
  84                 switch (1 << vdd) {
  85                 case MMC_VDD_33_34:
  86                 case MMC_VDD_32_33:
  87                         mV = 3300;
  88                         break;
  89                 case MMC_VDD_30_31:
  90                 case MMC_VDD_29_30:
  91                         mV = 3000;
  92                         break;
  93                 case MMC_VDD_28_29:
  94                 case MMC_VDD_27_28:
  95                         mV = 2800;
  96                         break;
  97                 case MMC_VDD_24_25:
  98                 case MMC_VDD_23_24:
  99                         mV = 2400;
 100                         break;
 101                 case MMC_VDD_22_23:
 102                 case MMC_VDD_21_22:
 103                         mV = 2200;
 104                         break;
 105                 case MMC_VDD_20_21:
 106                         mV = 2000;
 107                         break;
 108                 case MMC_VDD_165_195:
 109                         mV = 1800;
 110                         break;
 111                 default:
 112                         BUG();
 113                 }
 114                 return menelaus_set_vdcdc(3, mV);
 115         }
 116         return 0;
 117 }
 118
 119 static void nokia_mmc_set_power_internal(struct device *dev,
 120                                          int power_on)
 121 {
 122         dev_dbg(dev, "Set internal slot power %s\n",
 123                 power_on ? "on" : "off");
 124
 125         if (power_on) {
 126                 omap_set_gpio_dataout(n810_slot2_pw_vddf, 1);
 127                 udelay(30);
 128                 omap_set_gpio_dataout(n810_slot2_pw_vdd, 1);
 129                 udelay(100);
 130         } else {
 131                 omap_set_gpio_dataout(n810_slot2_pw_vdd, 0);
 132                 msleep(50);
 133                 omap_set_gpio_dataout(n810_slot2_pw_vddf, 0);
 134                 msleep(50);
 135         }
 136 }
 137
 138 static int n800_mmc_set_power(struct device *dev, int slot, int power_on,
 139                               int vdd)
 140 {
 141         if (machine_is_nokia_n800() || slot == 0)
 142                 return n800_mmc_set_power_menelaus(dev, slot, power_on, vdd);
 143
 144         nokia_mmc_set_power_internal(dev, power_on);
 145
 146         return 0;
 147 }
 148
 149 static int n800_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
 150 {
 151         int r;
 152
 153         dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
 154                 bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
 155         BUG_ON(slot != 0 && slot != 1);
 156         slot++;
 157         switch (bus_mode) {
 158         case MMC_BUSMODE_OPENDRAIN:
 159                 r = menelaus_set_mmc_opendrain(slot, 1);
 160                 break;
 161         case MMC_BUSMODE_PUSHPULL:
 162                 r = menelaus_set_mmc_opendrain(slot, 0);
 163                 break;
 164         default:
 165                 BUG();
 166         }
 167         if (r != 0 && printk_ratelimit())
 168                 dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
 169                         slot);
 170         return r;
 171 }
 172
 173 static int n800_mmc_get_cover_state(struct device *dev, int slot)
 174 {
 175         slot++;
 176         BUG_ON(slot != 1 && slot != 2);
 177         if (slot == 1)
 178                 return slot1_cover_open;
 179         else
 180                 return slot2_cover_open;
 181 }
 182
 183 static void n800_mmc_callback(void *data, u8 card_mask)
 184 {
 185         int bit, *openp, index;
 186
 187         if (machine_is_nokia_n800()) {
 188                 bit = 1 << 1;
 189                 openp = &slot2_cover_open;
 190                 index = 1;
 191         } else {
 192                 bit = 1;
 193                 openp = &slot1_cover_open;
 194                 index = 0;
 195         }
 196
 197         if (card_mask & bit)
 198                 *openp = 1;
 199         else
 200                 *openp = 0;
 201
 202         omap_mmc_notify_cover_event(mmc_device, index, *openp);
 203 }
 204
 205 void n800_mmc_slot1_cover_handler(void *arg, int closed_state)
 206 {
 207         if (mmc_device == NULL)
 208                 return;
 209
 210         slot1_cover_open = !closed_state;
 211         omap_mmc_notify_cover_event(mmc_device, 0, closed_state);
 212 }
 213
 214 static int n800_mmc_late_init(struct device *dev)
 215 {
 216         int r, bit, *openp;
 217         int vs2sel;
 218
 219         mmc_device = dev;
 220
 221         r = menelaus_set_slot_sel(1);
 222         if (r < 0)
 223                 return r;
 224
 225         if (machine_is_nokia_n800())
 226                 vs2sel = 0;
 227         else
 228                 vs2sel = 2;
 229
 230         r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
 231         if (r < 0)
 232                 return r;
 233
 234         n800_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
 235         n800_mmc_set_power(dev, 1, MMC_POWER_ON, 16);
 236
 237         r = menelaus_set_mmc_slot(1, 1, 0, 1);
 238         if (r < 0)
 239                 return r;
 240         r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
 241         if (r < 0)
 242                 return r;
 243
 244         r = menelaus_get_slot_pin_states();
 245         if (r < 0)
 246                 return r;
 247
 248         if (machine_is_nokia_n800()) {
 249                 bit = 1 << 1;
 250                 openp = &slot2_cover_open;
 251         } else {
 252                 bit = 1;
 253                 openp = &slot1_cover_open;
 254                 slot2_cover_open = 0;
 255         }
 256
 257         /* All slot pin bits seem to be inversed until first swith change */
 258         if (r == 0xf || r == (0xf & ~bit))
 259                 r = ~r;
 260
 261         if (r & bit)
 262                 *openp = 1;
 263         else
 264                 *openp = 0;
 265
 266         r = menelaus_register_mmc_callback(n800_mmc_callback, NULL);
 267
 268         return r;
 269 }
 270
 271 static void n800_mmc_shutdown(struct device *dev)
 272 {
 273         int vs2sel;
 274
 275         if (machine_is_nokia_n800())
 276                 vs2sel = 0;
 277         else
 278                 vs2sel = 2;
 279
 280         menelaus_set_mmc_slot(1, 0, 0, 0);
 281         menelaus_set_mmc_slot(2, 0, vs2sel, 0);
 282 }
 283
 284 static void n800_mmc_cleanup(struct device *dev)
 285 {
 286         menelaus_unregister_mmc_callback();
 287
 288         omap_free_gpio(slot_switch_gpio);
 289
 290         if (machine_is_nokia_n810()) {
 291                 omap_free_gpio(n810_slot2_pw_vddf);
 292                 omap_free_gpio(n810_slot2_pw_vdd);
 293         }
 294 }
 295
 296 static struct omap_mmc_platform_data n800_mmc_data = {
 297         .nr_slots               = 2,
 298         .switch_slot            = n800_mmc_switch_slot,
 299         .init                   = n800_mmc_late_init,
 300         .cleanup                = n800_mmc_cleanup,
 301         .shutdown               = n800_mmc_shutdown,
 302         .max_freq               = 24000000,
 303         .slots[0] = {
 304                 .set_power      = n800_mmc_set_power,
 305                 .set_bus_mode   = n800_mmc_set_bus_mode,
 306                 .get_ro         = NULL,
 307                 .get_cover_state= n800_mmc_get_cover_state,
 308                 .ocr_mask       = MMC_VDD_165_195 | MMC_VDD_30_31 |
 309                                   MMC_VDD_32_33   | MMC_VDD_33_34,
 310                 .name           = "internal",
 311         },
 312         .slots[1] = {
 313                 .set_power      = n800_mmc_set_power,
 314                 .set_bus_mode   = n800_mmc_set_bus_mode,
 315                 .get_ro         = NULL,
 316                 .get_cover_state= n800_mmc_get_cover_state,
 317                 .ocr_mask       = MMC_VDD_165_195 | MMC_VDD_20_21 |
 318                                   MMC_VDD_21_22 | MMC_VDD_22_23 | MMC_VDD_23_24 |
 319                                   MMC_VDD_24_25 | MMC_VDD_27_28 | MMC_VDD_28_29 |
 320                                   MMC_VDD_29_30 | MMC_VDD_30_31 | MMC_VDD_32_33 |
 321                                   MMC_VDD_33_34,
 322                 .name           = "external",
 323         },
 324 };
 325
 326 void __init n800_mmc_init(void)
 327
 328 {
 329         if (machine_is_nokia_n810()) {
 330                 n800_mmc_data.slots[0].name = "external";
 331
 332                 /*
 333                  * Some Samsung Movinand chips do not like open-ended
 334                  * multi-block reads and fall to braind-dead state
 335                  * while doing so. Reducing the number of blocks in
 336                  * the transfer or delays in clock disable do not help
 337                  */
 338                 n800_mmc_data.slots[1].name = "internal";
 339                 n800_mmc_data.slots[1].ban_openended = 1;
 340         }
 341
 342         omap_set_mmc_info(1, &n800_mmc_data);
 343         if (omap_request_gpio(slot_switch_gpio) < 0)
 344                 BUG();
 345         omap_set_gpio_dataout(slot_switch_gpio, 0);
 346         omap_set_gpio_direction(slot_switch_gpio, 0);
 347
 348         if (machine_is_nokia_n810()) {
 349                 if (omap_request_gpio(n810_slot2_pw_vddf) < 0)
 350                         BUG();
 351                 omap_set_gpio_dataout(n810_slot2_pw_vddf, 0);
 352                 omap_set_gpio_direction(n810_slot2_pw_vddf, 0);
 353
 354                 if (omap_request_gpio(n810_slot2_pw_vdd) < 0)
 355                         BUG();
 356                 omap_set_gpio_dataout(n810_slot2_pw_vdd, 0);
 357                 omap_set_gpio_direction(n810_slot2_pw_vdd, 0);
 358         }
 359 }
 360 #else
 361
 362 void __init n800_mmc_init(void)
 363 {
 364 }
 365
 366 void n800_mmc_slot1_cover_handler(void *arg, int state)
 367 {
 368 }
 369
 370 #endif