Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1 | /* |
| 2 | * drivers/mmc/host/omap_hsmmc.c |
| 3 | * |
| 4 | * Driver for OMAP2430/3430 MMC controller. |
| 5 | * |
| 6 | * Copyright (C) 2007 Texas Instruments. |
| 7 | * |
| 8 | * Authors: |
| 9 | * Syed Mohammed Khasim <x0khasim@ti.com> |
| 10 | * Madhusudhan <madhu.cr@ti.com> |
| 11 | * Mohit Jalori <mjalori@ti.com> |
| 12 | * |
| 13 | * This file is licensed under the terms of the GNU General Public License |
| 14 | * version 2. This program is licensed "as is" without any warranty of any |
| 15 | * kind, whether express or implied. |
| 16 | */ |
| 17 | |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/init.h> |
Denis Karpov | d900f71 | 2009-09-22 16:44:38 -0700 | [diff] [blame] | 20 | #include <linux/debugfs.h> |
| 21 | #include <linux/seq_file.h> |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 22 | #include <linux/interrupt.h> |
| 23 | #include <linux/delay.h> |
| 24 | #include <linux/dma-mapping.h> |
| 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/workqueue.h> |
| 27 | #include <linux/timer.h> |
| 28 | #include <linux/clk.h> |
| 29 | #include <linux/mmc/host.h> |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 30 | #include <linux/mmc/core.h> |
Adrian Hunter | 93caf8e69 | 2010-08-11 14:17:48 -0700 | [diff] [blame] | 31 | #include <linux/mmc/mmc.h> |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 32 | #include <linux/io.h> |
| 33 | #include <linux/semaphore.h> |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 34 | #include <linux/gpio.h> |
| 35 | #include <linux/regulator/consumer.h> |
Tony Lindgren | ce491cf | 2009-10-20 09:40:47 -0700 | [diff] [blame] | 36 | #include <plat/dma.h> |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 37 | #include <mach/hardware.h> |
Tony Lindgren | ce491cf | 2009-10-20 09:40:47 -0700 | [diff] [blame] | 38 | #include <plat/board.h> |
| 39 | #include <plat/mmc.h> |
| 40 | #include <plat/cpu.h> |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 41 | |
| 42 | /* OMAP HSMMC Host Controller Registers */ |
| 43 | #define OMAP_HSMMC_SYSCONFIG 0x0010 |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 44 | #define OMAP_HSMMC_SYSSTATUS 0x0014 |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 45 | #define OMAP_HSMMC_CON 0x002C |
| 46 | #define OMAP_HSMMC_BLK 0x0104 |
| 47 | #define OMAP_HSMMC_ARG 0x0108 |
| 48 | #define OMAP_HSMMC_CMD 0x010C |
| 49 | #define OMAP_HSMMC_RSP10 0x0110 |
| 50 | #define OMAP_HSMMC_RSP32 0x0114 |
| 51 | #define OMAP_HSMMC_RSP54 0x0118 |
| 52 | #define OMAP_HSMMC_RSP76 0x011C |
| 53 | #define OMAP_HSMMC_DATA 0x0120 |
| 54 | #define OMAP_HSMMC_HCTL 0x0128 |
| 55 | #define OMAP_HSMMC_SYSCTL 0x012C |
| 56 | #define OMAP_HSMMC_STAT 0x0130 |
| 57 | #define OMAP_HSMMC_IE 0x0134 |
| 58 | #define OMAP_HSMMC_ISE 0x0138 |
| 59 | #define OMAP_HSMMC_CAPA 0x0140 |
| 60 | |
| 61 | #define VS18 (1 << 26) |
| 62 | #define VS30 (1 << 25) |
| 63 | #define SDVS18 (0x5 << 9) |
| 64 | #define SDVS30 (0x6 << 9) |
David Brownell | eb25082 | 2009-02-17 14:49:01 -0800 | [diff] [blame] | 65 | #define SDVS33 (0x7 << 9) |
Kim Kyuwon | 1b331e6 | 2009-02-20 13:10:08 +0100 | [diff] [blame] | 66 | #define SDVS_MASK 0x00000E00 |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 67 | #define SDVSCLR 0xFFFFF1FF |
| 68 | #define SDVSDET 0x00000400 |
| 69 | #define AUTOIDLE 0x1 |
| 70 | #define SDBP (1 << 8) |
| 71 | #define DTO 0xe |
| 72 | #define ICE 0x1 |
| 73 | #define ICS 0x2 |
| 74 | #define CEN (1 << 2) |
| 75 | #define CLKD_MASK 0x0000FFC0 |
| 76 | #define CLKD_SHIFT 6 |
| 77 | #define DTO_MASK 0x000F0000 |
| 78 | #define DTO_SHIFT 16 |
| 79 | #define INT_EN_MASK 0x307F0033 |
Anand Gadiyar | ccdfe3a | 2009-09-22 16:44:21 -0700 | [diff] [blame] | 80 | #define BWR_ENABLE (1 << 4) |
| 81 | #define BRR_ENABLE (1 << 5) |
Adrian Hunter | 93caf8e69 | 2010-08-11 14:17:48 -0700 | [diff] [blame] | 82 | #define DTO_ENABLE (1 << 20) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 83 | #define INIT_STREAM (1 << 1) |
| 84 | #define DP_SELECT (1 << 21) |
| 85 | #define DDIR (1 << 4) |
| 86 | #define DMA_EN 0x1 |
| 87 | #define MSBS (1 << 5) |
| 88 | #define BCE (1 << 1) |
| 89 | #define FOUR_BIT (1 << 1) |
Jarkko Lavinen | 7315301 | 2008-11-21 16:49:54 +0200 | [diff] [blame] | 90 | #define DW8 (1 << 5) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 91 | #define CC 0x1 |
| 92 | #define TC 0x02 |
| 93 | #define OD 0x1 |
| 94 | #define ERR (1 << 15) |
| 95 | #define CMD_TIMEOUT (1 << 16) |
| 96 | #define DATA_TIMEOUT (1 << 20) |
| 97 | #define CMD_CRC (1 << 17) |
| 98 | #define DATA_CRC (1 << 21) |
| 99 | #define CARD_ERR (1 << 28) |
| 100 | #define STAT_CLEAR 0xFFFFFFFF |
| 101 | #define INIT_STREAM_CMD 0x00000000 |
| 102 | #define DUAL_VOLT_OCR_BIT 7 |
| 103 | #define SRC (1 << 25) |
| 104 | #define SRD (1 << 26) |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 105 | #define SOFTRESET (1 << 1) |
| 106 | #define RESETDONE (1 << 0) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 107 | |
| 108 | /* |
| 109 | * FIXME: Most likely all the data using these _DEVID defines should come |
| 110 | * from the platform_data, or implemented in controller and slot specific |
| 111 | * functions. |
| 112 | */ |
| 113 | #define OMAP_MMC1_DEVID 0 |
| 114 | #define OMAP_MMC2_DEVID 1 |
Grazvydas Ignotas | f3e2f1d | 2009-01-03 10:36:13 +0000 | [diff] [blame] | 115 | #define OMAP_MMC3_DEVID 2 |
kishore kadiyala | 82cf818 | 2009-09-22 16:45:25 -0700 | [diff] [blame] | 116 | #define OMAP_MMC4_DEVID 3 |
| 117 | #define OMAP_MMC5_DEVID 4 |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 118 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 119 | #define MMC_TIMEOUT_MS 20 |
| 120 | #define OMAP_MMC_MASTER_CLOCK 96000000 |
| 121 | #define DRIVER_NAME "mmci-omap-hs" |
| 122 | |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 123 | /* Timeouts for entering power saving states on inactivity, msec */ |
| 124 | #define OMAP_MMC_DISABLED_TIMEOUT 100 |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 125 | #define OMAP_MMC_SLEEP_TIMEOUT 1000 |
| 126 | #define OMAP_MMC_OFF_TIMEOUT 8000 |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 127 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 128 | /* |
| 129 | * One controller can have multiple slots, like on some omap boards using |
| 130 | * omap.c controller driver. Luckily this is not currently done on any known |
| 131 | * omap_hsmmc.c device. |
| 132 | */ |
| 133 | #define mmc_slot(host) (host->pdata->slots[host->slot_id]) |
| 134 | |
| 135 | /* |
| 136 | * MMC Host controller read/write API's |
| 137 | */ |
| 138 | #define OMAP_HSMMC_READ(base, reg) \ |
| 139 | __raw_readl((base) + OMAP_HSMMC_##reg) |
| 140 | |
| 141 | #define OMAP_HSMMC_WRITE(base, reg, val) \ |
| 142 | __raw_writel((val), (base) + OMAP_HSMMC_##reg) |
| 143 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 144 | struct omap_hsmmc_host { |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 145 | struct device *dev; |
| 146 | struct mmc_host *mmc; |
| 147 | struct mmc_request *mrq; |
| 148 | struct mmc_command *cmd; |
| 149 | struct mmc_data *data; |
| 150 | struct clk *fclk; |
| 151 | struct clk *iclk; |
| 152 | struct clk *dbclk; |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 153 | /* |
| 154 | * vcc == configured supply |
| 155 | * vcc_aux == optional |
| 156 | * - MMC1, supply for DAT4..DAT7 |
| 157 | * - MMC2/MMC2, external level shifter voltage supply, for |
| 158 | * chip (SDIO, eMMC, etc) or transceiver (MMC2 only) |
| 159 | */ |
| 160 | struct regulator *vcc; |
| 161 | struct regulator *vcc_aux; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 162 | struct work_struct mmc_carddetect_work; |
| 163 | void __iomem *base; |
| 164 | resource_size_t mapbase; |
Adrian Hunter | 4dffd7a | 2009-09-22 16:44:58 -0700 | [diff] [blame] | 165 | spinlock_t irq_lock; /* Prevent races with irq handler */ |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 166 | unsigned int id; |
| 167 | unsigned int dma_len; |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 168 | unsigned int dma_sg_idx; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 169 | unsigned char bus_mode; |
Adrian Hunter | a362146 | 2009-09-22 16:44:42 -0700 | [diff] [blame] | 170 | unsigned char power_mode; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 171 | u32 *buffer; |
| 172 | u32 bytesleft; |
| 173 | int suspended; |
| 174 | int irq; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 175 | int use_dma, dma_ch; |
Grazvydas Ignotas | f3e2f1d | 2009-01-03 10:36:13 +0000 | [diff] [blame] | 176 | int dma_line_tx, dma_line_rx; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 177 | int slot_id; |
Adrian Hunter | 2bec089 | 2009-09-22 16:45:02 -0700 | [diff] [blame] | 178 | int got_dbclk; |
Adrian Hunter | 4a694dc | 2009-01-12 16:13:08 +0200 | [diff] [blame] | 179 | int response_busy; |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 180 | int context_loss; |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 181 | int dpm_state; |
Adrian Hunter | 623821f | 2009-09-22 16:44:51 -0700 | [diff] [blame] | 182 | int vdd; |
Adrian Hunter | b62f622 | 2009-09-22 16:45:01 -0700 | [diff] [blame] | 183 | int protect_card; |
| 184 | int reqs_blocked; |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 185 | int use_reg; |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 186 | int req_in_progress; |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 187 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 188 | struct omap_mmc_platform_data *pdata; |
| 189 | }; |
| 190 | |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 191 | static int omap_hsmmc_card_detect(struct device *dev, int slot) |
| 192 | { |
| 193 | struct omap_mmc_platform_data *mmc = dev->platform_data; |
| 194 | |
| 195 | /* NOTE: assumes card detect signal is active-low */ |
| 196 | return !gpio_get_value_cansleep(mmc->slots[0].switch_pin); |
| 197 | } |
| 198 | |
| 199 | static int omap_hsmmc_get_wp(struct device *dev, int slot) |
| 200 | { |
| 201 | struct omap_mmc_platform_data *mmc = dev->platform_data; |
| 202 | |
| 203 | /* NOTE: assumes write protect signal is active-high */ |
| 204 | return gpio_get_value_cansleep(mmc->slots[0].gpio_wp); |
| 205 | } |
| 206 | |
| 207 | static int omap_hsmmc_get_cover_state(struct device *dev, int slot) |
| 208 | { |
| 209 | struct omap_mmc_platform_data *mmc = dev->platform_data; |
| 210 | |
| 211 | /* NOTE: assumes card detect signal is active-low */ |
| 212 | return !gpio_get_value_cansleep(mmc->slots[0].switch_pin); |
| 213 | } |
| 214 | |
| 215 | #ifdef CONFIG_PM |
| 216 | |
| 217 | static int omap_hsmmc_suspend_cdirq(struct device *dev, int slot) |
| 218 | { |
| 219 | struct omap_mmc_platform_data *mmc = dev->platform_data; |
| 220 | |
| 221 | disable_irq(mmc->slots[0].card_detect_irq); |
| 222 | return 0; |
| 223 | } |
| 224 | |
| 225 | static int omap_hsmmc_resume_cdirq(struct device *dev, int slot) |
| 226 | { |
| 227 | struct omap_mmc_platform_data *mmc = dev->platform_data; |
| 228 | |
| 229 | enable_irq(mmc->slots[0].card_detect_irq); |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | #else |
| 234 | |
| 235 | #define omap_hsmmc_suspend_cdirq NULL |
| 236 | #define omap_hsmmc_resume_cdirq NULL |
| 237 | |
| 238 | #endif |
| 239 | |
Adrian Hunter | b702b10 | 2010-02-15 10:03:35 -0800 | [diff] [blame] | 240 | #ifdef CONFIG_REGULATOR |
| 241 | |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 242 | static int omap_hsmmc_1_set_power(struct device *dev, int slot, int power_on, |
| 243 | int vdd) |
| 244 | { |
| 245 | struct omap_hsmmc_host *host = |
| 246 | platform_get_drvdata(to_platform_device(dev)); |
| 247 | int ret; |
| 248 | |
| 249 | if (mmc_slot(host).before_set_reg) |
| 250 | mmc_slot(host).before_set_reg(dev, slot, power_on, vdd); |
| 251 | |
| 252 | if (power_on) |
| 253 | ret = mmc_regulator_set_ocr(host->vcc, vdd); |
| 254 | else |
| 255 | ret = mmc_regulator_set_ocr(host->vcc, 0); |
| 256 | |
| 257 | if (mmc_slot(host).after_set_reg) |
| 258 | mmc_slot(host).after_set_reg(dev, slot, power_on, vdd); |
| 259 | |
| 260 | return ret; |
| 261 | } |
| 262 | |
| 263 | static int omap_hsmmc_23_set_power(struct device *dev, int slot, int power_on, |
| 264 | int vdd) |
| 265 | { |
| 266 | struct omap_hsmmc_host *host = |
| 267 | platform_get_drvdata(to_platform_device(dev)); |
| 268 | int ret = 0; |
| 269 | |
| 270 | /* |
| 271 | * If we don't see a Vcc regulator, assume it's a fixed |
| 272 | * voltage always-on regulator. |
| 273 | */ |
| 274 | if (!host->vcc) |
| 275 | return 0; |
| 276 | |
| 277 | if (mmc_slot(host).before_set_reg) |
| 278 | mmc_slot(host).before_set_reg(dev, slot, power_on, vdd); |
| 279 | |
| 280 | /* |
| 281 | * Assume Vcc regulator is used only to power the card ... OMAP |
| 282 | * VDDS is used to power the pins, optionally with a transceiver to |
| 283 | * support cards using voltages other than VDDS (1.8V nominal). When a |
| 284 | * transceiver is used, DAT3..7 are muxed as transceiver control pins. |
| 285 | * |
| 286 | * In some cases this regulator won't support enable/disable; |
| 287 | * e.g. it's a fixed rail for a WLAN chip. |
| 288 | * |
| 289 | * In other cases vcc_aux switches interface power. Example, for |
| 290 | * eMMC cards it represents VccQ. Sometimes transceivers or SDIO |
| 291 | * chips/cards need an interface voltage rail too. |
| 292 | */ |
| 293 | if (power_on) { |
| 294 | ret = mmc_regulator_set_ocr(host->vcc, vdd); |
| 295 | /* Enable interface voltage rail, if needed */ |
| 296 | if (ret == 0 && host->vcc_aux) { |
| 297 | ret = regulator_enable(host->vcc_aux); |
| 298 | if (ret < 0) |
| 299 | ret = mmc_regulator_set_ocr(host->vcc, 0); |
| 300 | } |
| 301 | } else { |
Adrian Hunter | 6da20c8 | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 302 | if (host->vcc_aux) |
| 303 | ret = regulator_disable(host->vcc_aux); |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 304 | if (ret == 0) |
| 305 | ret = mmc_regulator_set_ocr(host->vcc, 0); |
| 306 | } |
| 307 | |
| 308 | if (mmc_slot(host).after_set_reg) |
| 309 | mmc_slot(host).after_set_reg(dev, slot, power_on, vdd); |
| 310 | |
| 311 | return ret; |
| 312 | } |
| 313 | |
| 314 | static int omap_hsmmc_1_set_sleep(struct device *dev, int slot, int sleep, |
| 315 | int vdd, int cardsleep) |
| 316 | { |
| 317 | struct omap_hsmmc_host *host = |
| 318 | platform_get_drvdata(to_platform_device(dev)); |
| 319 | int mode = sleep ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL; |
| 320 | |
| 321 | return regulator_set_mode(host->vcc, mode); |
| 322 | } |
| 323 | |
| 324 | static int omap_hsmmc_23_set_sleep(struct device *dev, int slot, int sleep, |
| 325 | int vdd, int cardsleep) |
| 326 | { |
| 327 | struct omap_hsmmc_host *host = |
| 328 | platform_get_drvdata(to_platform_device(dev)); |
| 329 | int err, mode; |
| 330 | |
| 331 | /* |
| 332 | * If we don't see a Vcc regulator, assume it's a fixed |
| 333 | * voltage always-on regulator. |
| 334 | */ |
| 335 | if (!host->vcc) |
| 336 | return 0; |
| 337 | |
| 338 | mode = sleep ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL; |
| 339 | |
| 340 | if (!host->vcc_aux) |
| 341 | return regulator_set_mode(host->vcc, mode); |
| 342 | |
| 343 | if (cardsleep) { |
| 344 | /* VCC can be turned off if card is asleep */ |
| 345 | if (sleep) |
| 346 | err = mmc_regulator_set_ocr(host->vcc, 0); |
| 347 | else |
| 348 | err = mmc_regulator_set_ocr(host->vcc, vdd); |
| 349 | } else |
| 350 | err = regulator_set_mode(host->vcc, mode); |
| 351 | if (err) |
| 352 | return err; |
Adrian Hunter | e0eb242 | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 353 | |
| 354 | if (!mmc_slot(host).vcc_aux_disable_is_sleep) |
| 355 | return regulator_set_mode(host->vcc_aux, mode); |
| 356 | |
| 357 | if (sleep) |
| 358 | return regulator_disable(host->vcc_aux); |
| 359 | else |
| 360 | return regulator_enable(host->vcc_aux); |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 361 | } |
| 362 | |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 363 | static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) |
| 364 | { |
| 365 | struct regulator *reg; |
| 366 | int ret = 0; |
kishore kadiyala | 64be978 | 2010-10-01 16:35:28 -0700 | [diff] [blame^] | 367 | int ocr_value = 0; |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 368 | |
| 369 | switch (host->id) { |
| 370 | case OMAP_MMC1_DEVID: |
| 371 | /* On-chip level shifting via PBIAS0/PBIAS1 */ |
| 372 | mmc_slot(host).set_power = omap_hsmmc_1_set_power; |
| 373 | mmc_slot(host).set_sleep = omap_hsmmc_1_set_sleep; |
| 374 | break; |
| 375 | case OMAP_MMC2_DEVID: |
| 376 | case OMAP_MMC3_DEVID: |
| 377 | /* Off-chip level shifting, or none */ |
| 378 | mmc_slot(host).set_power = omap_hsmmc_23_set_power; |
| 379 | mmc_slot(host).set_sleep = omap_hsmmc_23_set_sleep; |
| 380 | break; |
| 381 | default: |
| 382 | pr_err("MMC%d configuration not supported!\n", host->id); |
| 383 | return -EINVAL; |
| 384 | } |
| 385 | |
| 386 | reg = regulator_get(host->dev, "vmmc"); |
| 387 | if (IS_ERR(reg)) { |
| 388 | dev_dbg(host->dev, "vmmc regulator missing\n"); |
| 389 | /* |
| 390 | * HACK: until fixed.c regulator is usable, |
| 391 | * we don't require a main regulator |
| 392 | * for MMC2 or MMC3 |
| 393 | */ |
| 394 | if (host->id == OMAP_MMC1_DEVID) { |
| 395 | ret = PTR_ERR(reg); |
| 396 | goto err; |
| 397 | } |
| 398 | } else { |
| 399 | host->vcc = reg; |
kishore kadiyala | 64be978 | 2010-10-01 16:35:28 -0700 | [diff] [blame^] | 400 | ocr_value = mmc_regulator_get_ocrmask(reg); |
| 401 | if (!mmc_slot(host).ocr_mask) { |
| 402 | mmc_slot(host).ocr_mask = ocr_value; |
| 403 | } else { |
| 404 | if (!(mmc_slot(host).ocr_mask & ocr_value)) { |
| 405 | pr_err("MMC%d ocrmask %x is not supported\n", |
| 406 | host->id, mmc_slot(host).ocr_mask); |
| 407 | mmc_slot(host).ocr_mask = 0; |
| 408 | return -EINVAL; |
| 409 | } |
| 410 | } |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 411 | mmc_slot(host).ocr_mask = mmc_regulator_get_ocrmask(reg); |
| 412 | |
| 413 | /* Allow an aux regulator */ |
| 414 | reg = regulator_get(host->dev, "vmmc_aux"); |
| 415 | host->vcc_aux = IS_ERR(reg) ? NULL : reg; |
| 416 | |
| 417 | /* |
| 418 | * UGLY HACK: workaround regulator framework bugs. |
| 419 | * When the bootloader leaves a supply active, it's |
| 420 | * initialized with zero usecount ... and we can't |
| 421 | * disable it without first enabling it. Until the |
| 422 | * framework is fixed, we need a workaround like this |
| 423 | * (which is safe for MMC, but not in general). |
| 424 | */ |
| 425 | if (regulator_is_enabled(host->vcc) > 0) { |
| 426 | regulator_enable(host->vcc); |
| 427 | regulator_disable(host->vcc); |
| 428 | } |
| 429 | if (host->vcc_aux) { |
| 430 | if (regulator_is_enabled(reg) > 0) { |
| 431 | regulator_enable(reg); |
| 432 | regulator_disable(reg); |
| 433 | } |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | return 0; |
| 438 | |
| 439 | err: |
| 440 | mmc_slot(host).set_power = NULL; |
| 441 | mmc_slot(host).set_sleep = NULL; |
| 442 | return ret; |
| 443 | } |
| 444 | |
| 445 | static void omap_hsmmc_reg_put(struct omap_hsmmc_host *host) |
| 446 | { |
| 447 | regulator_put(host->vcc); |
| 448 | regulator_put(host->vcc_aux); |
| 449 | mmc_slot(host).set_power = NULL; |
| 450 | mmc_slot(host).set_sleep = NULL; |
| 451 | } |
| 452 | |
Adrian Hunter | b702b10 | 2010-02-15 10:03:35 -0800 | [diff] [blame] | 453 | static inline int omap_hsmmc_have_reg(void) |
| 454 | { |
| 455 | return 1; |
| 456 | } |
| 457 | |
| 458 | #else |
| 459 | |
| 460 | static inline int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) |
| 461 | { |
| 462 | return -EINVAL; |
| 463 | } |
| 464 | |
| 465 | static inline void omap_hsmmc_reg_put(struct omap_hsmmc_host *host) |
| 466 | { |
| 467 | } |
| 468 | |
| 469 | static inline int omap_hsmmc_have_reg(void) |
| 470 | { |
| 471 | return 0; |
| 472 | } |
| 473 | |
| 474 | #endif |
| 475 | |
| 476 | static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata) |
| 477 | { |
| 478 | int ret; |
| 479 | |
| 480 | if (gpio_is_valid(pdata->slots[0].switch_pin)) { |
| 481 | pdata->suspend = omap_hsmmc_suspend_cdirq; |
| 482 | pdata->resume = omap_hsmmc_resume_cdirq; |
| 483 | if (pdata->slots[0].cover) |
| 484 | pdata->slots[0].get_cover_state = |
| 485 | omap_hsmmc_get_cover_state; |
| 486 | else |
| 487 | pdata->slots[0].card_detect = omap_hsmmc_card_detect; |
| 488 | pdata->slots[0].card_detect_irq = |
| 489 | gpio_to_irq(pdata->slots[0].switch_pin); |
| 490 | ret = gpio_request(pdata->slots[0].switch_pin, "mmc_cd"); |
| 491 | if (ret) |
| 492 | return ret; |
| 493 | ret = gpio_direction_input(pdata->slots[0].switch_pin); |
| 494 | if (ret) |
| 495 | goto err_free_sp; |
| 496 | } else |
| 497 | pdata->slots[0].switch_pin = -EINVAL; |
| 498 | |
| 499 | if (gpio_is_valid(pdata->slots[0].gpio_wp)) { |
| 500 | pdata->slots[0].get_ro = omap_hsmmc_get_wp; |
| 501 | ret = gpio_request(pdata->slots[0].gpio_wp, "mmc_wp"); |
| 502 | if (ret) |
| 503 | goto err_free_cd; |
| 504 | ret = gpio_direction_input(pdata->slots[0].gpio_wp); |
| 505 | if (ret) |
| 506 | goto err_free_wp; |
| 507 | } else |
| 508 | pdata->slots[0].gpio_wp = -EINVAL; |
| 509 | |
| 510 | return 0; |
| 511 | |
| 512 | err_free_wp: |
| 513 | gpio_free(pdata->slots[0].gpio_wp); |
| 514 | err_free_cd: |
| 515 | if (gpio_is_valid(pdata->slots[0].switch_pin)) |
| 516 | err_free_sp: |
| 517 | gpio_free(pdata->slots[0].switch_pin); |
| 518 | return ret; |
| 519 | } |
| 520 | |
| 521 | static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata) |
| 522 | { |
| 523 | if (gpio_is_valid(pdata->slots[0].gpio_wp)) |
| 524 | gpio_free(pdata->slots[0].gpio_wp); |
| 525 | if (gpio_is_valid(pdata->slots[0].switch_pin)) |
| 526 | gpio_free(pdata->slots[0].switch_pin); |
| 527 | } |
| 528 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 529 | /* |
| 530 | * Stop clock to the card |
| 531 | */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 532 | static void omap_hsmmc_stop_clock(struct omap_hsmmc_host *host) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 533 | { |
| 534 | OMAP_HSMMC_WRITE(host->base, SYSCTL, |
| 535 | OMAP_HSMMC_READ(host->base, SYSCTL) & ~CEN); |
| 536 | if ((OMAP_HSMMC_READ(host->base, SYSCTL) & CEN) != 0x0) |
| 537 | dev_dbg(mmc_dev(host->mmc), "MMC Clock is not stoped\n"); |
| 538 | } |
| 539 | |
Adrian Hunter | 93caf8e69 | 2010-08-11 14:17:48 -0700 | [diff] [blame] | 540 | static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host, |
| 541 | struct mmc_command *cmd) |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 542 | { |
| 543 | unsigned int irq_mask; |
| 544 | |
| 545 | if (host->use_dma) |
| 546 | irq_mask = INT_EN_MASK & ~(BRR_ENABLE | BWR_ENABLE); |
| 547 | else |
| 548 | irq_mask = INT_EN_MASK; |
| 549 | |
Adrian Hunter | 93caf8e69 | 2010-08-11 14:17:48 -0700 | [diff] [blame] | 550 | /* Disable timeout for erases */ |
| 551 | if (cmd->opcode == MMC_ERASE) |
| 552 | irq_mask &= ~DTO_ENABLE; |
| 553 | |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 554 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); |
| 555 | OMAP_HSMMC_WRITE(host->base, ISE, irq_mask); |
| 556 | OMAP_HSMMC_WRITE(host->base, IE, irq_mask); |
| 557 | } |
| 558 | |
| 559 | static void omap_hsmmc_disable_irq(struct omap_hsmmc_host *host) |
| 560 | { |
| 561 | OMAP_HSMMC_WRITE(host->base, ISE, 0); |
| 562 | OMAP_HSMMC_WRITE(host->base, IE, 0); |
| 563 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); |
| 564 | } |
| 565 | |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 566 | #ifdef CONFIG_PM |
| 567 | |
| 568 | /* |
| 569 | * Restore the MMC host context, if it was lost as result of a |
| 570 | * power state change. |
| 571 | */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 572 | static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host) |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 573 | { |
| 574 | struct mmc_ios *ios = &host->mmc->ios; |
| 575 | struct omap_mmc_platform_data *pdata = host->pdata; |
| 576 | int context_loss = 0; |
| 577 | u32 hctl, capa, con; |
| 578 | u16 dsor = 0; |
| 579 | unsigned long timeout; |
| 580 | |
| 581 | if (pdata->get_context_loss_count) { |
| 582 | context_loss = pdata->get_context_loss_count(host->dev); |
| 583 | if (context_loss < 0) |
| 584 | return 1; |
| 585 | } |
| 586 | |
| 587 | dev_dbg(mmc_dev(host->mmc), "context was %slost\n", |
| 588 | context_loss == host->context_loss ? "not " : ""); |
| 589 | if (host->context_loss == context_loss) |
| 590 | return 1; |
| 591 | |
| 592 | /* Wait for hardware reset */ |
| 593 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); |
| 594 | while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE |
| 595 | && time_before(jiffies, timeout)) |
| 596 | ; |
| 597 | |
| 598 | /* Do software reset */ |
| 599 | OMAP_HSMMC_WRITE(host->base, SYSCONFIG, SOFTRESET); |
| 600 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); |
| 601 | while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE |
| 602 | && time_before(jiffies, timeout)) |
| 603 | ; |
| 604 | |
| 605 | OMAP_HSMMC_WRITE(host->base, SYSCONFIG, |
| 606 | OMAP_HSMMC_READ(host->base, SYSCONFIG) | AUTOIDLE); |
| 607 | |
| 608 | if (host->id == OMAP_MMC1_DEVID) { |
| 609 | if (host->power_mode != MMC_POWER_OFF && |
| 610 | (1 << ios->vdd) <= MMC_VDD_23_24) |
| 611 | hctl = SDVS18; |
| 612 | else |
| 613 | hctl = SDVS30; |
| 614 | capa = VS30 | VS18; |
| 615 | } else { |
| 616 | hctl = SDVS18; |
| 617 | capa = VS18; |
| 618 | } |
| 619 | |
| 620 | OMAP_HSMMC_WRITE(host->base, HCTL, |
| 621 | OMAP_HSMMC_READ(host->base, HCTL) | hctl); |
| 622 | |
| 623 | OMAP_HSMMC_WRITE(host->base, CAPA, |
| 624 | OMAP_HSMMC_READ(host->base, CAPA) | capa); |
| 625 | |
| 626 | OMAP_HSMMC_WRITE(host->base, HCTL, |
| 627 | OMAP_HSMMC_READ(host->base, HCTL) | SDBP); |
| 628 | |
| 629 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); |
| 630 | while ((OMAP_HSMMC_READ(host->base, HCTL) & SDBP) != SDBP |
| 631 | && time_before(jiffies, timeout)) |
| 632 | ; |
| 633 | |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 634 | omap_hsmmc_disable_irq(host); |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 635 | |
| 636 | /* Do not initialize card-specific things if the power is off */ |
| 637 | if (host->power_mode == MMC_POWER_OFF) |
| 638 | goto out; |
| 639 | |
| 640 | con = OMAP_HSMMC_READ(host->base, CON); |
| 641 | switch (ios->bus_width) { |
| 642 | case MMC_BUS_WIDTH_8: |
| 643 | OMAP_HSMMC_WRITE(host->base, CON, con | DW8); |
| 644 | break; |
| 645 | case MMC_BUS_WIDTH_4: |
| 646 | OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8); |
| 647 | OMAP_HSMMC_WRITE(host->base, HCTL, |
| 648 | OMAP_HSMMC_READ(host->base, HCTL) | FOUR_BIT); |
| 649 | break; |
| 650 | case MMC_BUS_WIDTH_1: |
| 651 | OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8); |
| 652 | OMAP_HSMMC_WRITE(host->base, HCTL, |
| 653 | OMAP_HSMMC_READ(host->base, HCTL) & ~FOUR_BIT); |
| 654 | break; |
| 655 | } |
| 656 | |
| 657 | if (ios->clock) { |
| 658 | dsor = OMAP_MMC_MASTER_CLOCK / ios->clock; |
| 659 | if (dsor < 1) |
| 660 | dsor = 1; |
| 661 | |
| 662 | if (OMAP_MMC_MASTER_CLOCK / dsor > ios->clock) |
| 663 | dsor++; |
| 664 | |
| 665 | if (dsor > 250) |
| 666 | dsor = 250; |
| 667 | } |
| 668 | |
| 669 | OMAP_HSMMC_WRITE(host->base, SYSCTL, |
| 670 | OMAP_HSMMC_READ(host->base, SYSCTL) & ~CEN); |
| 671 | OMAP_HSMMC_WRITE(host->base, SYSCTL, (dsor << 6) | (DTO << 16)); |
| 672 | OMAP_HSMMC_WRITE(host->base, SYSCTL, |
| 673 | OMAP_HSMMC_READ(host->base, SYSCTL) | ICE); |
| 674 | |
| 675 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); |
| 676 | while ((OMAP_HSMMC_READ(host->base, SYSCTL) & ICS) != ICS |
| 677 | && time_before(jiffies, timeout)) |
| 678 | ; |
| 679 | |
| 680 | OMAP_HSMMC_WRITE(host->base, SYSCTL, |
| 681 | OMAP_HSMMC_READ(host->base, SYSCTL) | CEN); |
| 682 | |
| 683 | con = OMAP_HSMMC_READ(host->base, CON); |
| 684 | if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) |
| 685 | OMAP_HSMMC_WRITE(host->base, CON, con | OD); |
| 686 | else |
| 687 | OMAP_HSMMC_WRITE(host->base, CON, con & ~OD); |
| 688 | out: |
| 689 | host->context_loss = context_loss; |
| 690 | |
| 691 | dev_dbg(mmc_dev(host->mmc), "context is restored\n"); |
| 692 | return 0; |
| 693 | } |
| 694 | |
| 695 | /* |
| 696 | * Save the MMC host context (store the number of power state changes so far). |
| 697 | */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 698 | static void omap_hsmmc_context_save(struct omap_hsmmc_host *host) |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 699 | { |
| 700 | struct omap_mmc_platform_data *pdata = host->pdata; |
| 701 | int context_loss; |
| 702 | |
| 703 | if (pdata->get_context_loss_count) { |
| 704 | context_loss = pdata->get_context_loss_count(host->dev); |
| 705 | if (context_loss < 0) |
| 706 | return; |
| 707 | host->context_loss = context_loss; |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | #else |
| 712 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 713 | static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host) |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 714 | { |
| 715 | return 0; |
| 716 | } |
| 717 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 718 | static void omap_hsmmc_context_save(struct omap_hsmmc_host *host) |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 719 | { |
| 720 | } |
| 721 | |
| 722 | #endif |
| 723 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 724 | /* |
| 725 | * Send init stream sequence to card |
| 726 | * before sending IDLE command |
| 727 | */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 728 | static void send_init_stream(struct omap_hsmmc_host *host) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 729 | { |
| 730 | int reg = 0; |
| 731 | unsigned long timeout; |
| 732 | |
Adrian Hunter | b62f622 | 2009-09-22 16:45:01 -0700 | [diff] [blame] | 733 | if (host->protect_card) |
| 734 | return; |
| 735 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 736 | disable_irq(host->irq); |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 737 | |
| 738 | OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 739 | OMAP_HSMMC_WRITE(host->base, CON, |
| 740 | OMAP_HSMMC_READ(host->base, CON) | INIT_STREAM); |
| 741 | OMAP_HSMMC_WRITE(host->base, CMD, INIT_STREAM_CMD); |
| 742 | |
| 743 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); |
| 744 | while ((reg != CC) && time_before(jiffies, timeout)) |
| 745 | reg = OMAP_HSMMC_READ(host->base, STAT) & CC; |
| 746 | |
| 747 | OMAP_HSMMC_WRITE(host->base, CON, |
| 748 | OMAP_HSMMC_READ(host->base, CON) & ~INIT_STREAM); |
Adrian Hunter | c653a6d | 2009-09-22 16:44:56 -0700 | [diff] [blame] | 749 | |
| 750 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); |
| 751 | OMAP_HSMMC_READ(host->base, STAT); |
| 752 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 753 | enable_irq(host->irq); |
| 754 | } |
| 755 | |
| 756 | static inline |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 757 | int omap_hsmmc_cover_is_closed(struct omap_hsmmc_host *host) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 758 | { |
| 759 | int r = 1; |
| 760 | |
Denis Karpov | 191d1f1 | 2009-09-22 16:44:55 -0700 | [diff] [blame] | 761 | if (mmc_slot(host).get_cover_state) |
| 762 | r = mmc_slot(host).get_cover_state(host->dev, host->slot_id); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 763 | return r; |
| 764 | } |
| 765 | |
| 766 | static ssize_t |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 767 | omap_hsmmc_show_cover_switch(struct device *dev, struct device_attribute *attr, |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 768 | char *buf) |
| 769 | { |
| 770 | struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev); |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 771 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 772 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 773 | return sprintf(buf, "%s\n", |
| 774 | omap_hsmmc_cover_is_closed(host) ? "closed" : "open"); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 775 | } |
| 776 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 777 | static DEVICE_ATTR(cover_switch, S_IRUGO, omap_hsmmc_show_cover_switch, NULL); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 778 | |
| 779 | static ssize_t |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 780 | omap_hsmmc_show_slot_name(struct device *dev, struct device_attribute *attr, |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 781 | char *buf) |
| 782 | { |
| 783 | struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev); |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 784 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 785 | |
Denis Karpov | 191d1f1 | 2009-09-22 16:44:55 -0700 | [diff] [blame] | 786 | return sprintf(buf, "%s\n", mmc_slot(host).name); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 787 | } |
| 788 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 789 | static DEVICE_ATTR(slot_name, S_IRUGO, omap_hsmmc_show_slot_name, NULL); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 790 | |
| 791 | /* |
| 792 | * Configure the response type and send the cmd. |
| 793 | */ |
| 794 | static void |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 795 | omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd, |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 796 | struct mmc_data *data) |
| 797 | { |
| 798 | int cmdreg = 0, resptype = 0, cmdtype = 0; |
| 799 | |
| 800 | dev_dbg(mmc_dev(host->mmc), "%s: CMD%d, argument 0x%08x\n", |
| 801 | mmc_hostname(host->mmc), cmd->opcode, cmd->arg); |
| 802 | host->cmd = cmd; |
| 803 | |
Adrian Hunter | 93caf8e69 | 2010-08-11 14:17:48 -0700 | [diff] [blame] | 804 | omap_hsmmc_enable_irq(host, cmd); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 805 | |
Adrian Hunter | 4a694dc | 2009-01-12 16:13:08 +0200 | [diff] [blame] | 806 | host->response_busy = 0; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 807 | if (cmd->flags & MMC_RSP_PRESENT) { |
| 808 | if (cmd->flags & MMC_RSP_136) |
| 809 | resptype = 1; |
Adrian Hunter | 4a694dc | 2009-01-12 16:13:08 +0200 | [diff] [blame] | 810 | else if (cmd->flags & MMC_RSP_BUSY) { |
| 811 | resptype = 3; |
| 812 | host->response_busy = 1; |
| 813 | } else |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 814 | resptype = 2; |
| 815 | } |
| 816 | |
| 817 | /* |
| 818 | * Unlike OMAP1 controller, the cmdtype does not seem to be based on |
| 819 | * ac, bc, adtc, bcr. Only commands ending an open ended transfer need |
| 820 | * a val of 0x3, rest 0x0. |
| 821 | */ |
| 822 | if (cmd == host->mrq->stop) |
| 823 | cmdtype = 0x3; |
| 824 | |
| 825 | cmdreg = (cmd->opcode << 24) | (resptype << 16) | (cmdtype << 22); |
| 826 | |
| 827 | if (data) { |
| 828 | cmdreg |= DP_SELECT | MSBS | BCE; |
| 829 | if (data->flags & MMC_DATA_READ) |
| 830 | cmdreg |= DDIR; |
| 831 | else |
| 832 | cmdreg &= ~(DDIR); |
| 833 | } |
| 834 | |
| 835 | if (host->use_dma) |
| 836 | cmdreg |= DMA_EN; |
| 837 | |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 838 | host->req_in_progress = 1; |
Adrian Hunter | 4dffd7a | 2009-09-22 16:44:58 -0700 | [diff] [blame] | 839 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 840 | OMAP_HSMMC_WRITE(host->base, ARG, cmd->arg); |
| 841 | OMAP_HSMMC_WRITE(host->base, CMD, cmdreg); |
| 842 | } |
| 843 | |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 844 | static int |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 845 | omap_hsmmc_get_dma_dir(struct omap_hsmmc_host *host, struct mmc_data *data) |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 846 | { |
| 847 | if (data->flags & MMC_DATA_WRITE) |
| 848 | return DMA_TO_DEVICE; |
| 849 | else |
| 850 | return DMA_FROM_DEVICE; |
| 851 | } |
| 852 | |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 853 | static void omap_hsmmc_request_done(struct omap_hsmmc_host *host, struct mmc_request *mrq) |
| 854 | { |
| 855 | int dma_ch; |
| 856 | |
| 857 | spin_lock(&host->irq_lock); |
| 858 | host->req_in_progress = 0; |
| 859 | dma_ch = host->dma_ch; |
| 860 | spin_unlock(&host->irq_lock); |
| 861 | |
| 862 | omap_hsmmc_disable_irq(host); |
| 863 | /* Do not complete the request if DMA is still in progress */ |
| 864 | if (mrq->data && host->use_dma && dma_ch != -1) |
| 865 | return; |
| 866 | host->mrq = NULL; |
| 867 | mmc_request_done(host->mmc, mrq); |
| 868 | } |
| 869 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 870 | /* |
| 871 | * Notify the transfer complete to MMC core |
| 872 | */ |
| 873 | static void |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 874 | omap_hsmmc_xfer_done(struct omap_hsmmc_host *host, struct mmc_data *data) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 875 | { |
Adrian Hunter | 4a694dc | 2009-01-12 16:13:08 +0200 | [diff] [blame] | 876 | if (!data) { |
| 877 | struct mmc_request *mrq = host->mrq; |
| 878 | |
Adrian Hunter | 2305010 | 2009-09-22 16:44:57 -0700 | [diff] [blame] | 879 | /* TC before CC from CMD6 - don't know why, but it happens */ |
| 880 | if (host->cmd && host->cmd->opcode == 6 && |
| 881 | host->response_busy) { |
| 882 | host->response_busy = 0; |
| 883 | return; |
| 884 | } |
| 885 | |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 886 | omap_hsmmc_request_done(host, mrq); |
Adrian Hunter | 4a694dc | 2009-01-12 16:13:08 +0200 | [diff] [blame] | 887 | return; |
| 888 | } |
| 889 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 890 | host->data = NULL; |
| 891 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 892 | if (!data->error) |
| 893 | data->bytes_xfered += data->blocks * (data->blksz); |
| 894 | else |
| 895 | data->bytes_xfered = 0; |
| 896 | |
| 897 | if (!data->stop) { |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 898 | omap_hsmmc_request_done(host, data->mrq); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 899 | return; |
| 900 | } |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 901 | omap_hsmmc_start_command(host, data->stop, NULL); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 902 | } |
| 903 | |
| 904 | /* |
| 905 | * Notify the core about command completion |
| 906 | */ |
| 907 | static void |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 908 | omap_hsmmc_cmd_done(struct omap_hsmmc_host *host, struct mmc_command *cmd) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 909 | { |
| 910 | host->cmd = NULL; |
| 911 | |
| 912 | if (cmd->flags & MMC_RSP_PRESENT) { |
| 913 | if (cmd->flags & MMC_RSP_136) { |
| 914 | /* response type 2 */ |
| 915 | cmd->resp[3] = OMAP_HSMMC_READ(host->base, RSP10); |
| 916 | cmd->resp[2] = OMAP_HSMMC_READ(host->base, RSP32); |
| 917 | cmd->resp[1] = OMAP_HSMMC_READ(host->base, RSP54); |
| 918 | cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP76); |
| 919 | } else { |
| 920 | /* response types 1, 1b, 3, 4, 5, 6 */ |
| 921 | cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP10); |
| 922 | } |
| 923 | } |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 924 | if ((host->data == NULL && !host->response_busy) || cmd->error) |
| 925 | omap_hsmmc_request_done(host, cmd->mrq); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 926 | } |
| 927 | |
| 928 | /* |
| 929 | * DMA clean up for command errors |
| 930 | */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 931 | static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 932 | { |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 933 | int dma_ch; |
| 934 | |
Jarkko Lavinen | 82788ff | 2008-12-05 12:31:46 +0200 | [diff] [blame] | 935 | host->data->error = errno; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 936 | |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 937 | spin_lock(&host->irq_lock); |
| 938 | dma_ch = host->dma_ch; |
| 939 | host->dma_ch = -1; |
| 940 | spin_unlock(&host->irq_lock); |
| 941 | |
| 942 | if (host->use_dma && dma_ch != -1) { |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 943 | dma_unmap_sg(mmc_dev(host->mmc), host->data->sg, host->dma_len, |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 944 | omap_hsmmc_get_dma_dir(host, host->data)); |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 945 | omap_free_dma(dma_ch); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 946 | } |
| 947 | host->data = NULL; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 948 | } |
| 949 | |
| 950 | /* |
| 951 | * Readable error output |
| 952 | */ |
| 953 | #ifdef CONFIG_MMC_DEBUG |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 954 | static void omap_hsmmc_report_irq(struct omap_hsmmc_host *host, u32 status) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 955 | { |
| 956 | /* --- means reserved bit without definition at documentation */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 957 | static const char *omap_hsmmc_status_bits[] = { |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 958 | "CC", "TC", "BGE", "---", "BWR", "BRR", "---", "---", "CIRQ", |
| 959 | "OBI", "---", "---", "---", "---", "---", "ERRI", "CTO", "CCRC", |
| 960 | "CEB", "CIE", "DTO", "DCRC", "DEB", "---", "ACE", "---", |
| 961 | "---", "---", "---", "CERR", "CERR", "BADA", "---", "---", "---" |
| 962 | }; |
| 963 | char res[256]; |
| 964 | char *buf = res; |
| 965 | int len, i; |
| 966 | |
| 967 | len = sprintf(buf, "MMC IRQ 0x%x :", status); |
| 968 | buf += len; |
| 969 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 970 | for (i = 0; i < ARRAY_SIZE(omap_hsmmc_status_bits); i++) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 971 | if (status & (1 << i)) { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 972 | len = sprintf(buf, " %s", omap_hsmmc_status_bits[i]); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 973 | buf += len; |
| 974 | } |
| 975 | |
| 976 | dev_dbg(mmc_dev(host->mmc), "%s\n", res); |
| 977 | } |
| 978 | #endif /* CONFIG_MMC_DEBUG */ |
| 979 | |
Jean Pihet | 3ebf74b | 2009-02-06 16:42:51 +0100 | [diff] [blame] | 980 | /* |
| 981 | * MMC controller internal state machines reset |
| 982 | * |
| 983 | * Used to reset command or data internal state machines, using respectively |
| 984 | * SRC or SRD bit of SYSCTL register |
| 985 | * Can be called from interrupt context |
| 986 | */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 987 | static inline void omap_hsmmc_reset_controller_fsm(struct omap_hsmmc_host *host, |
| 988 | unsigned long bit) |
Jean Pihet | 3ebf74b | 2009-02-06 16:42:51 +0100 | [diff] [blame] | 989 | { |
| 990 | unsigned long i = 0; |
| 991 | unsigned long limit = (loops_per_jiffy * |
| 992 | msecs_to_jiffies(MMC_TIMEOUT_MS)); |
| 993 | |
| 994 | OMAP_HSMMC_WRITE(host->base, SYSCTL, |
| 995 | OMAP_HSMMC_READ(host->base, SYSCTL) | bit); |
| 996 | |
Madhusudhan Chikkature | 07ad64b | 2010-10-01 16:35:25 -0700 | [diff] [blame] | 997 | /* |
| 998 | * OMAP4 ES2 and greater has an updated reset logic. |
| 999 | * Monitor a 0->1 transition first |
| 1000 | */ |
| 1001 | if (mmc_slot(host).features & HSMMC_HAS_UPDATED_RESET) { |
| 1002 | while ((!(OMAP_HSMMC_READ(host, SYSCTL) & bit)) |
| 1003 | && (i++ < limit)) |
| 1004 | cpu_relax(); |
| 1005 | } |
| 1006 | i = 0; |
| 1007 | |
Jean Pihet | 3ebf74b | 2009-02-06 16:42:51 +0100 | [diff] [blame] | 1008 | while ((OMAP_HSMMC_READ(host->base, SYSCTL) & bit) && |
| 1009 | (i++ < limit)) |
| 1010 | cpu_relax(); |
| 1011 | |
| 1012 | if (OMAP_HSMMC_READ(host->base, SYSCTL) & bit) |
| 1013 | dev_err(mmc_dev(host->mmc), |
| 1014 | "Timeout waiting on controller reset in %s\n", |
| 1015 | __func__); |
| 1016 | } |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1017 | |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1018 | static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1019 | { |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1020 | struct mmc_data *data; |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1021 | int end_cmd = 0, end_trans = 0; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1022 | |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1023 | if (!host->req_in_progress) { |
| 1024 | do { |
| 1025 | OMAP_HSMMC_WRITE(host->base, STAT, status); |
| 1026 | /* Flush posted write */ |
| 1027 | status = OMAP_HSMMC_READ(host->base, STAT); |
| 1028 | } while (status & INT_EN_MASK); |
| 1029 | return; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1030 | } |
| 1031 | |
| 1032 | data = host->data; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1033 | dev_dbg(mmc_dev(host->mmc), "IRQ Status is %x\n", status); |
| 1034 | |
| 1035 | if (status & ERR) { |
| 1036 | #ifdef CONFIG_MMC_DEBUG |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1037 | omap_hsmmc_report_irq(host, status); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1038 | #endif |
| 1039 | if ((status & CMD_TIMEOUT) || |
| 1040 | (status & CMD_CRC)) { |
| 1041 | if (host->cmd) { |
| 1042 | if (status & CMD_TIMEOUT) { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1043 | omap_hsmmc_reset_controller_fsm(host, |
| 1044 | SRC); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1045 | host->cmd->error = -ETIMEDOUT; |
| 1046 | } else { |
| 1047 | host->cmd->error = -EILSEQ; |
| 1048 | } |
| 1049 | end_cmd = 1; |
| 1050 | } |
Adrian Hunter | 4a694dc | 2009-01-12 16:13:08 +0200 | [diff] [blame] | 1051 | if (host->data || host->response_busy) { |
| 1052 | if (host->data) |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1053 | omap_hsmmc_dma_cleanup(host, |
| 1054 | -ETIMEDOUT); |
Adrian Hunter | 4a694dc | 2009-01-12 16:13:08 +0200 | [diff] [blame] | 1055 | host->response_busy = 0; |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1056 | omap_hsmmc_reset_controller_fsm(host, SRD); |
Jean Pihet | c232f45 | 2009-02-11 13:11:39 -0800 | [diff] [blame] | 1057 | } |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1058 | } |
| 1059 | if ((status & DATA_TIMEOUT) || |
| 1060 | (status & DATA_CRC)) { |
Adrian Hunter | 4a694dc | 2009-01-12 16:13:08 +0200 | [diff] [blame] | 1061 | if (host->data || host->response_busy) { |
| 1062 | int err = (status & DATA_TIMEOUT) ? |
| 1063 | -ETIMEDOUT : -EILSEQ; |
| 1064 | |
| 1065 | if (host->data) |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1066 | omap_hsmmc_dma_cleanup(host, err); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1067 | else |
Adrian Hunter | 4a694dc | 2009-01-12 16:13:08 +0200 | [diff] [blame] | 1068 | host->mrq->cmd->error = err; |
| 1069 | host->response_busy = 0; |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1070 | omap_hsmmc_reset_controller_fsm(host, SRD); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1071 | end_trans = 1; |
| 1072 | } |
| 1073 | } |
| 1074 | if (status & CARD_ERR) { |
| 1075 | dev_dbg(mmc_dev(host->mmc), |
| 1076 | "Ignoring card err CMD%d\n", host->cmd->opcode); |
| 1077 | if (host->cmd) |
| 1078 | end_cmd = 1; |
| 1079 | if (host->data) |
| 1080 | end_trans = 1; |
| 1081 | } |
| 1082 | } |
| 1083 | |
| 1084 | OMAP_HSMMC_WRITE(host->base, STAT, status); |
| 1085 | |
Jarkko Lavinen | a8fe29d | 2009-04-08 11:18:32 +0300 | [diff] [blame] | 1086 | if (end_cmd || ((status & CC) && host->cmd)) |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1087 | omap_hsmmc_cmd_done(host, host->cmd); |
Jarkko Lavinen | 0a40e64 | 2009-09-22 16:44:54 -0700 | [diff] [blame] | 1088 | if ((end_trans || (status & TC)) && host->mrq) |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1089 | omap_hsmmc_xfer_done(host, data); |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1090 | } |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1091 | |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1092 | /* |
| 1093 | * MMC controller IRQ handler |
| 1094 | */ |
| 1095 | static irqreturn_t omap_hsmmc_irq(int irq, void *dev_id) |
| 1096 | { |
| 1097 | struct omap_hsmmc_host *host = dev_id; |
| 1098 | int status; |
| 1099 | |
| 1100 | status = OMAP_HSMMC_READ(host->base, STAT); |
| 1101 | do { |
| 1102 | omap_hsmmc_do_irq(host, status); |
| 1103 | /* Flush posted write */ |
| 1104 | status = OMAP_HSMMC_READ(host->base, STAT); |
| 1105 | } while (status & INT_EN_MASK); |
Adrian Hunter | 4dffd7a | 2009-09-22 16:44:58 -0700 | [diff] [blame] | 1106 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1107 | return IRQ_HANDLED; |
| 1108 | } |
| 1109 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1110 | static void set_sd_bus_power(struct omap_hsmmc_host *host) |
Adrian Hunter | e13bb30 | 2009-03-12 17:08:26 +0200 | [diff] [blame] | 1111 | { |
| 1112 | unsigned long i; |
| 1113 | |
| 1114 | OMAP_HSMMC_WRITE(host->base, HCTL, |
| 1115 | OMAP_HSMMC_READ(host->base, HCTL) | SDBP); |
| 1116 | for (i = 0; i < loops_per_jiffy; i++) { |
| 1117 | if (OMAP_HSMMC_READ(host->base, HCTL) & SDBP) |
| 1118 | break; |
| 1119 | cpu_relax(); |
| 1120 | } |
| 1121 | } |
| 1122 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1123 | /* |
David Brownell | eb25082 | 2009-02-17 14:49:01 -0800 | [diff] [blame] | 1124 | * Switch MMC interface voltage ... only relevant for MMC1. |
| 1125 | * |
| 1126 | * MMC2 and MMC3 use fixed 1.8V levels, and maybe a transceiver. |
| 1127 | * The MMC2 transceiver controls are used instead of DAT4..DAT7. |
| 1128 | * Some chips, like eMMC ones, use internal transceivers. |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1129 | */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1130 | static int omap_hsmmc_switch_opcond(struct omap_hsmmc_host *host, int vdd) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1131 | { |
| 1132 | u32 reg_val = 0; |
| 1133 | int ret; |
| 1134 | |
| 1135 | /* Disable the clocks */ |
| 1136 | clk_disable(host->fclk); |
| 1137 | clk_disable(host->iclk); |
Adrian Hunter | 2bec089 | 2009-09-22 16:45:02 -0700 | [diff] [blame] | 1138 | if (host->got_dbclk) |
| 1139 | clk_disable(host->dbclk); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1140 | |
| 1141 | /* Turn the power off */ |
| 1142 | ret = mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1143 | |
| 1144 | /* Turn the power ON with given VDD 1.8 or 3.0v */ |
Adrian Hunter | 2bec089 | 2009-09-22 16:45:02 -0700 | [diff] [blame] | 1145 | if (!ret) |
| 1146 | ret = mmc_slot(host).set_power(host->dev, host->slot_id, 1, |
| 1147 | vdd); |
| 1148 | clk_enable(host->iclk); |
| 1149 | clk_enable(host->fclk); |
| 1150 | if (host->got_dbclk) |
| 1151 | clk_enable(host->dbclk); |
| 1152 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1153 | if (ret != 0) |
| 1154 | goto err; |
| 1155 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1156 | OMAP_HSMMC_WRITE(host->base, HCTL, |
| 1157 | OMAP_HSMMC_READ(host->base, HCTL) & SDVSCLR); |
| 1158 | reg_val = OMAP_HSMMC_READ(host->base, HCTL); |
David Brownell | eb25082 | 2009-02-17 14:49:01 -0800 | [diff] [blame] | 1159 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1160 | /* |
| 1161 | * If a MMC dual voltage card is detected, the set_ios fn calls |
| 1162 | * this fn with VDD bit set for 1.8V. Upon card removal from the |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1163 | * slot, omap_hsmmc_set_ios sets the VDD back to 3V on MMC_POWER_OFF. |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1164 | * |
David Brownell | eb25082 | 2009-02-17 14:49:01 -0800 | [diff] [blame] | 1165 | * Cope with a bit of slop in the range ... per data sheets: |
| 1166 | * - "1.8V" for vdds_mmc1/vdds_mmc1a can be up to 2.45V max, |
| 1167 | * but recommended values are 1.71V to 1.89V |
| 1168 | * - "3.0V" for vdds_mmc1/vdds_mmc1a can be up to 3.5V max, |
| 1169 | * but recommended values are 2.7V to 3.3V |
| 1170 | * |
| 1171 | * Board setup code shouldn't permit anything very out-of-range. |
| 1172 | * TWL4030-family VMMC1 and VSIM regulators are fine (avoiding the |
| 1173 | * middle range) but VSIM can't power DAT4..DAT7 at more than 3V. |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1174 | */ |
David Brownell | eb25082 | 2009-02-17 14:49:01 -0800 | [diff] [blame] | 1175 | if ((1 << vdd) <= MMC_VDD_23_24) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1176 | reg_val |= SDVS18; |
David Brownell | eb25082 | 2009-02-17 14:49:01 -0800 | [diff] [blame] | 1177 | else |
| 1178 | reg_val |= SDVS30; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1179 | |
| 1180 | OMAP_HSMMC_WRITE(host->base, HCTL, reg_val); |
Adrian Hunter | e13bb30 | 2009-03-12 17:08:26 +0200 | [diff] [blame] | 1181 | set_sd_bus_power(host); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1182 | |
| 1183 | return 0; |
| 1184 | err: |
| 1185 | dev_dbg(mmc_dev(host->mmc), "Unable to switch operating voltage\n"); |
| 1186 | return ret; |
| 1187 | } |
| 1188 | |
Adrian Hunter | b62f622 | 2009-09-22 16:45:01 -0700 | [diff] [blame] | 1189 | /* Protect the card while the cover is open */ |
| 1190 | static void omap_hsmmc_protect_card(struct omap_hsmmc_host *host) |
| 1191 | { |
| 1192 | if (!mmc_slot(host).get_cover_state) |
| 1193 | return; |
| 1194 | |
| 1195 | host->reqs_blocked = 0; |
| 1196 | if (mmc_slot(host).get_cover_state(host->dev, host->slot_id)) { |
| 1197 | if (host->protect_card) { |
| 1198 | printk(KERN_INFO "%s: cover is closed, " |
| 1199 | "card is now accessible\n", |
| 1200 | mmc_hostname(host->mmc)); |
| 1201 | host->protect_card = 0; |
| 1202 | } |
| 1203 | } else { |
| 1204 | if (!host->protect_card) { |
| 1205 | printk(KERN_INFO "%s: cover is open, " |
| 1206 | "card is now inaccessible\n", |
| 1207 | mmc_hostname(host->mmc)); |
| 1208 | host->protect_card = 1; |
| 1209 | } |
| 1210 | } |
| 1211 | } |
| 1212 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1213 | /* |
| 1214 | * Work Item to notify the core about card insertion/removal |
| 1215 | */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1216 | static void omap_hsmmc_detect(struct work_struct *work) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1217 | { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1218 | struct omap_hsmmc_host *host = |
| 1219 | container_of(work, struct omap_hsmmc_host, mmc_carddetect_work); |
David Brownell | 249d0fa | 2009-02-04 14:42:03 -0800 | [diff] [blame] | 1220 | struct omap_mmc_slot_data *slot = &mmc_slot(host); |
Adrian Hunter | a6b2240 | 2009-09-22 16:44:45 -0700 | [diff] [blame] | 1221 | int carddetect; |
David Brownell | 249d0fa | 2009-02-04 14:42:03 -0800 | [diff] [blame] | 1222 | |
Adrian Hunter | a6b2240 | 2009-09-22 16:44:45 -0700 | [diff] [blame] | 1223 | if (host->suspended) |
| 1224 | return; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1225 | |
| 1226 | sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch"); |
Adrian Hunter | a6b2240 | 2009-09-22 16:44:45 -0700 | [diff] [blame] | 1227 | |
Denis Karpov | 191d1f1 | 2009-09-22 16:44:55 -0700 | [diff] [blame] | 1228 | if (slot->card_detect) |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 1229 | carddetect = slot->card_detect(host->dev, host->slot_id); |
Adrian Hunter | b62f622 | 2009-09-22 16:45:01 -0700 | [diff] [blame] | 1230 | else { |
| 1231 | omap_hsmmc_protect_card(host); |
Adrian Hunter | a6b2240 | 2009-09-22 16:44:45 -0700 | [diff] [blame] | 1232 | carddetect = -ENOSYS; |
Adrian Hunter | b62f622 | 2009-09-22 16:45:01 -0700 | [diff] [blame] | 1233 | } |
Adrian Hunter | a6b2240 | 2009-09-22 16:44:45 -0700 | [diff] [blame] | 1234 | |
Madhusudhan Chikkature | cdeebad | 2010-04-06 14:34:49 -0700 | [diff] [blame] | 1235 | if (carddetect) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1236 | mmc_detect_change(host->mmc, (HZ * 200) / 1000); |
Madhusudhan Chikkature | cdeebad | 2010-04-06 14:34:49 -0700 | [diff] [blame] | 1237 | else |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1238 | mmc_detect_change(host->mmc, (HZ * 50) / 1000); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1239 | } |
| 1240 | |
| 1241 | /* |
| 1242 | * ISR for handling card insertion and removal |
| 1243 | */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1244 | static irqreturn_t omap_hsmmc_cd_handler(int irq, void *dev_id) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1245 | { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1246 | struct omap_hsmmc_host *host = (struct omap_hsmmc_host *)dev_id; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1247 | |
Adrian Hunter | a6b2240 | 2009-09-22 16:44:45 -0700 | [diff] [blame] | 1248 | if (host->suspended) |
| 1249 | return IRQ_HANDLED; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1250 | schedule_work(&host->mmc_carddetect_work); |
| 1251 | |
| 1252 | return IRQ_HANDLED; |
| 1253 | } |
| 1254 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1255 | static int omap_hsmmc_get_dma_sync_dev(struct omap_hsmmc_host *host, |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 1256 | struct mmc_data *data) |
| 1257 | { |
| 1258 | int sync_dev; |
| 1259 | |
Grazvydas Ignotas | f3e2f1d | 2009-01-03 10:36:13 +0000 | [diff] [blame] | 1260 | if (data->flags & MMC_DATA_WRITE) |
| 1261 | sync_dev = host->dma_line_tx; |
| 1262 | else |
| 1263 | sync_dev = host->dma_line_rx; |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 1264 | return sync_dev; |
| 1265 | } |
| 1266 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1267 | static void omap_hsmmc_config_dma_params(struct omap_hsmmc_host *host, |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 1268 | struct mmc_data *data, |
| 1269 | struct scatterlist *sgl) |
| 1270 | { |
| 1271 | int blksz, nblk, dma_ch; |
| 1272 | |
| 1273 | dma_ch = host->dma_ch; |
| 1274 | if (data->flags & MMC_DATA_WRITE) { |
| 1275 | omap_set_dma_dest_params(dma_ch, 0, OMAP_DMA_AMODE_CONSTANT, |
| 1276 | (host->mapbase + OMAP_HSMMC_DATA), 0, 0); |
| 1277 | omap_set_dma_src_params(dma_ch, 0, OMAP_DMA_AMODE_POST_INC, |
| 1278 | sg_dma_address(sgl), 0, 0); |
| 1279 | } else { |
| 1280 | omap_set_dma_src_params(dma_ch, 0, OMAP_DMA_AMODE_CONSTANT, |
Denis Karpov | 191d1f1 | 2009-09-22 16:44:55 -0700 | [diff] [blame] | 1281 | (host->mapbase + OMAP_HSMMC_DATA), 0, 0); |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 1282 | omap_set_dma_dest_params(dma_ch, 0, OMAP_DMA_AMODE_POST_INC, |
| 1283 | sg_dma_address(sgl), 0, 0); |
| 1284 | } |
| 1285 | |
| 1286 | blksz = host->data->blksz; |
| 1287 | nblk = sg_dma_len(sgl) / blksz; |
| 1288 | |
| 1289 | omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S32, |
| 1290 | blksz / 4, nblk, OMAP_DMA_SYNC_FRAME, |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1291 | omap_hsmmc_get_dma_sync_dev(host, data), |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 1292 | !(data->flags & MMC_DATA_WRITE)); |
| 1293 | |
| 1294 | omap_start_dma(dma_ch); |
| 1295 | } |
| 1296 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1297 | /* |
| 1298 | * DMA call back function |
| 1299 | */ |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1300 | static void omap_hsmmc_dma_cb(int lch, u16 ch_status, void *cb_data) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1301 | { |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1302 | struct omap_hsmmc_host *host = cb_data; |
| 1303 | struct mmc_data *data = host->mrq->data; |
| 1304 | int dma_ch, req_in_progress; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1305 | |
Venkatraman S | f3584e5 | 2010-08-10 18:01:54 -0700 | [diff] [blame] | 1306 | if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) { |
| 1307 | dev_warn(mmc_dev(host->mmc), "unexpected dma status %x\n", |
| 1308 | ch_status); |
| 1309 | return; |
| 1310 | } |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1311 | |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1312 | spin_lock(&host->irq_lock); |
| 1313 | if (host->dma_ch < 0) { |
| 1314 | spin_unlock(&host->irq_lock); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1315 | return; |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1316 | } |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1317 | |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 1318 | host->dma_sg_idx++; |
| 1319 | if (host->dma_sg_idx < host->dma_len) { |
| 1320 | /* Fire up the next transfer. */ |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1321 | omap_hsmmc_config_dma_params(host, data, |
| 1322 | data->sg + host->dma_sg_idx); |
| 1323 | spin_unlock(&host->irq_lock); |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 1324 | return; |
| 1325 | } |
| 1326 | |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1327 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->dma_len, |
| 1328 | omap_hsmmc_get_dma_dir(host, data)); |
| 1329 | |
| 1330 | req_in_progress = host->req_in_progress; |
| 1331 | dma_ch = host->dma_ch; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1332 | host->dma_ch = -1; |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1333 | spin_unlock(&host->irq_lock); |
| 1334 | |
| 1335 | omap_free_dma(dma_ch); |
| 1336 | |
| 1337 | /* If DMA has finished after TC, complete the request */ |
| 1338 | if (!req_in_progress) { |
| 1339 | struct mmc_request *mrq = host->mrq; |
| 1340 | |
| 1341 | host->mrq = NULL; |
| 1342 | mmc_request_done(host->mmc, mrq); |
| 1343 | } |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1344 | } |
| 1345 | |
| 1346 | /* |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1347 | * Routine to configure and start DMA for the MMC card |
| 1348 | */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1349 | static int omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host, |
| 1350 | struct mmc_request *req) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1351 | { |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1352 | int dma_ch = 0, ret = 0, i; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1353 | struct mmc_data *data = req->data; |
| 1354 | |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 1355 | /* Sanity check: all the SG entries must be aligned by block size. */ |
Jarkko Lavinen | a3f406f | 2009-09-22 16:44:46 -0700 | [diff] [blame] | 1356 | for (i = 0; i < data->sg_len; i++) { |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 1357 | struct scatterlist *sgl; |
| 1358 | |
| 1359 | sgl = data->sg + i; |
| 1360 | if (sgl->length % data->blksz) |
| 1361 | return -EINVAL; |
| 1362 | } |
| 1363 | if ((data->blksz % 4) != 0) |
| 1364 | /* REVISIT: The MMC buffer increments only when MSB is written. |
| 1365 | * Return error for blksz which is non multiple of four. |
| 1366 | */ |
| 1367 | return -EINVAL; |
| 1368 | |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1369 | BUG_ON(host->dma_ch != -1); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1370 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1371 | ret = omap_request_dma(omap_hsmmc_get_dma_sync_dev(host, data), |
| 1372 | "MMC/SD", omap_hsmmc_dma_cb, host, &dma_ch); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1373 | if (ret != 0) { |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 1374 | dev_err(mmc_dev(host->mmc), |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1375 | "%s: omap_request_dma() failed with %d\n", |
| 1376 | mmc_hostname(host->mmc), ret); |
| 1377 | return ret; |
| 1378 | } |
| 1379 | |
| 1380 | host->dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1381 | data->sg_len, omap_hsmmc_get_dma_dir(host, data)); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1382 | host->dma_ch = dma_ch; |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 1383 | host->dma_sg_idx = 0; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1384 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1385 | omap_hsmmc_config_dma_params(host, data, data->sg); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1386 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1387 | return 0; |
| 1388 | } |
| 1389 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1390 | static void set_data_timeout(struct omap_hsmmc_host *host, |
Adrian Hunter | e2bf08d | 2009-09-22 16:45:03 -0700 | [diff] [blame] | 1391 | unsigned int timeout_ns, |
| 1392 | unsigned int timeout_clks) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1393 | { |
| 1394 | unsigned int timeout, cycle_ns; |
| 1395 | uint32_t reg, clkd, dto = 0; |
| 1396 | |
| 1397 | reg = OMAP_HSMMC_READ(host->base, SYSCTL); |
| 1398 | clkd = (reg & CLKD_MASK) >> CLKD_SHIFT; |
| 1399 | if (clkd == 0) |
| 1400 | clkd = 1; |
| 1401 | |
| 1402 | cycle_ns = 1000000000 / (clk_get_rate(host->fclk) / clkd); |
Adrian Hunter | e2bf08d | 2009-09-22 16:45:03 -0700 | [diff] [blame] | 1403 | timeout = timeout_ns / cycle_ns; |
| 1404 | timeout += timeout_clks; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1405 | if (timeout) { |
| 1406 | while ((timeout & 0x80000000) == 0) { |
| 1407 | dto += 1; |
| 1408 | timeout <<= 1; |
| 1409 | } |
| 1410 | dto = 31 - dto; |
| 1411 | timeout <<= 1; |
| 1412 | if (timeout && dto) |
| 1413 | dto += 1; |
| 1414 | if (dto >= 13) |
| 1415 | dto -= 13; |
| 1416 | else |
| 1417 | dto = 0; |
| 1418 | if (dto > 14) |
| 1419 | dto = 14; |
| 1420 | } |
| 1421 | |
| 1422 | reg &= ~DTO_MASK; |
| 1423 | reg |= dto << DTO_SHIFT; |
| 1424 | OMAP_HSMMC_WRITE(host->base, SYSCTL, reg); |
| 1425 | } |
| 1426 | |
| 1427 | /* |
| 1428 | * Configure block length for MMC/SD cards and initiate the transfer. |
| 1429 | */ |
| 1430 | static int |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1431 | omap_hsmmc_prepare_data(struct omap_hsmmc_host *host, struct mmc_request *req) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1432 | { |
| 1433 | int ret; |
| 1434 | host->data = req->data; |
| 1435 | |
| 1436 | if (req->data == NULL) { |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1437 | OMAP_HSMMC_WRITE(host->base, BLK, 0); |
Adrian Hunter | e2bf08d | 2009-09-22 16:45:03 -0700 | [diff] [blame] | 1438 | /* |
| 1439 | * Set an arbitrary 100ms data timeout for commands with |
| 1440 | * busy signal. |
| 1441 | */ |
| 1442 | if (req->cmd->flags & MMC_RSP_BUSY) |
| 1443 | set_data_timeout(host, 100000000U, 0); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1444 | return 0; |
| 1445 | } |
| 1446 | |
| 1447 | OMAP_HSMMC_WRITE(host->base, BLK, (req->data->blksz) |
| 1448 | | (req->data->blocks << 16)); |
Adrian Hunter | e2bf08d | 2009-09-22 16:45:03 -0700 | [diff] [blame] | 1449 | set_data_timeout(host, req->data->timeout_ns, req->data->timeout_clks); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1450 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1451 | if (host->use_dma) { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1452 | ret = omap_hsmmc_start_dma_transfer(host, req); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1453 | if (ret != 0) { |
| 1454 | dev_dbg(mmc_dev(host->mmc), "MMC start dma failure\n"); |
| 1455 | return ret; |
| 1456 | } |
| 1457 | } |
| 1458 | return 0; |
| 1459 | } |
| 1460 | |
| 1461 | /* |
| 1462 | * Request function. for read/write operation |
| 1463 | */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1464 | static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1465 | { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1466 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
Jarkko Lavinen | a3f406f | 2009-09-22 16:44:46 -0700 | [diff] [blame] | 1467 | int err; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1468 | |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 1469 | BUG_ON(host->req_in_progress); |
| 1470 | BUG_ON(host->dma_ch != -1); |
| 1471 | if (host->protect_card) { |
| 1472 | if (host->reqs_blocked < 3) { |
| 1473 | /* |
| 1474 | * Ensure the controller is left in a consistent |
| 1475 | * state by resetting the command and data state |
| 1476 | * machines. |
| 1477 | */ |
| 1478 | omap_hsmmc_reset_controller_fsm(host, SRD); |
| 1479 | omap_hsmmc_reset_controller_fsm(host, SRC); |
| 1480 | host->reqs_blocked += 1; |
| 1481 | } |
| 1482 | req->cmd->error = -EBADF; |
| 1483 | if (req->data) |
| 1484 | req->data->error = -EBADF; |
| 1485 | req->cmd->retries = 0; |
| 1486 | mmc_request_done(mmc, req); |
| 1487 | return; |
| 1488 | } else if (host->reqs_blocked) |
| 1489 | host->reqs_blocked = 0; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1490 | WARN_ON(host->mrq != NULL); |
| 1491 | host->mrq = req; |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1492 | err = omap_hsmmc_prepare_data(host, req); |
Jarkko Lavinen | a3f406f | 2009-09-22 16:44:46 -0700 | [diff] [blame] | 1493 | if (err) { |
| 1494 | req->cmd->error = err; |
| 1495 | if (req->data) |
| 1496 | req->data->error = err; |
| 1497 | host->mrq = NULL; |
| 1498 | mmc_request_done(mmc, req); |
| 1499 | return; |
| 1500 | } |
| 1501 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1502 | omap_hsmmc_start_command(host, req->cmd, req->data); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1503 | } |
| 1504 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1505 | /* Routine to configure clock values. Exposed API to core */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1506 | static void omap_hsmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1507 | { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1508 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1509 | u16 dsor = 0; |
| 1510 | unsigned long regval; |
| 1511 | unsigned long timeout; |
Jarkko Lavinen | 7315301 | 2008-11-21 16:49:54 +0200 | [diff] [blame] | 1512 | u32 con; |
Adrian Hunter | a362146 | 2009-09-22 16:44:42 -0700 | [diff] [blame] | 1513 | int do_send_init_stream = 0; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1514 | |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 1515 | mmc_host_enable(host->mmc); |
| 1516 | |
Adrian Hunter | a362146 | 2009-09-22 16:44:42 -0700 | [diff] [blame] | 1517 | if (ios->power_mode != host->power_mode) { |
| 1518 | switch (ios->power_mode) { |
| 1519 | case MMC_POWER_OFF: |
| 1520 | mmc_slot(host).set_power(host->dev, host->slot_id, |
| 1521 | 0, 0); |
Adrian Hunter | 623821f | 2009-09-22 16:44:51 -0700 | [diff] [blame] | 1522 | host->vdd = 0; |
Adrian Hunter | a362146 | 2009-09-22 16:44:42 -0700 | [diff] [blame] | 1523 | break; |
| 1524 | case MMC_POWER_UP: |
| 1525 | mmc_slot(host).set_power(host->dev, host->slot_id, |
| 1526 | 1, ios->vdd); |
Adrian Hunter | 623821f | 2009-09-22 16:44:51 -0700 | [diff] [blame] | 1527 | host->vdd = ios->vdd; |
Adrian Hunter | a362146 | 2009-09-22 16:44:42 -0700 | [diff] [blame] | 1528 | break; |
| 1529 | case MMC_POWER_ON: |
| 1530 | do_send_init_stream = 1; |
| 1531 | break; |
| 1532 | } |
| 1533 | host->power_mode = ios->power_mode; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1534 | } |
| 1535 | |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1536 | /* FIXME: set registers based only on changes to ios */ |
| 1537 | |
Jarkko Lavinen | 7315301 | 2008-11-21 16:49:54 +0200 | [diff] [blame] | 1538 | con = OMAP_HSMMC_READ(host->base, CON); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1539 | switch (mmc->ios.bus_width) { |
Jarkko Lavinen | 7315301 | 2008-11-21 16:49:54 +0200 | [diff] [blame] | 1540 | case MMC_BUS_WIDTH_8: |
| 1541 | OMAP_HSMMC_WRITE(host->base, CON, con | DW8); |
| 1542 | break; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1543 | case MMC_BUS_WIDTH_4: |
Jarkko Lavinen | 7315301 | 2008-11-21 16:49:54 +0200 | [diff] [blame] | 1544 | OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1545 | OMAP_HSMMC_WRITE(host->base, HCTL, |
| 1546 | OMAP_HSMMC_READ(host->base, HCTL) | FOUR_BIT); |
| 1547 | break; |
| 1548 | case MMC_BUS_WIDTH_1: |
Jarkko Lavinen | 7315301 | 2008-11-21 16:49:54 +0200 | [diff] [blame] | 1549 | OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1550 | OMAP_HSMMC_WRITE(host->base, HCTL, |
| 1551 | OMAP_HSMMC_READ(host->base, HCTL) & ~FOUR_BIT); |
| 1552 | break; |
| 1553 | } |
| 1554 | |
| 1555 | if (host->id == OMAP_MMC1_DEVID) { |
David Brownell | eb25082 | 2009-02-17 14:49:01 -0800 | [diff] [blame] | 1556 | /* Only MMC1 can interface at 3V without some flavor |
| 1557 | * of external transceiver; but they all handle 1.8V. |
| 1558 | */ |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1559 | if ((OMAP_HSMMC_READ(host->base, HCTL) & SDVSDET) && |
| 1560 | (ios->vdd == DUAL_VOLT_OCR_BIT)) { |
| 1561 | /* |
| 1562 | * The mmc_select_voltage fn of the core does |
| 1563 | * not seem to set the power_mode to |
| 1564 | * MMC_POWER_UP upon recalculating the voltage. |
| 1565 | * vdd 1.8v. |
| 1566 | */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1567 | if (omap_hsmmc_switch_opcond(host, ios->vdd) != 0) |
| 1568 | dev_dbg(mmc_dev(host->mmc), |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1569 | "Switch operation failed\n"); |
| 1570 | } |
| 1571 | } |
| 1572 | |
| 1573 | if (ios->clock) { |
| 1574 | dsor = OMAP_MMC_MASTER_CLOCK / ios->clock; |
| 1575 | if (dsor < 1) |
| 1576 | dsor = 1; |
| 1577 | |
| 1578 | if (OMAP_MMC_MASTER_CLOCK / dsor > ios->clock) |
| 1579 | dsor++; |
| 1580 | |
| 1581 | if (dsor > 250) |
| 1582 | dsor = 250; |
| 1583 | } |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1584 | omap_hsmmc_stop_clock(host); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1585 | regval = OMAP_HSMMC_READ(host->base, SYSCTL); |
| 1586 | regval = regval & ~(CLKD_MASK); |
| 1587 | regval = regval | (dsor << 6) | (DTO << 16); |
| 1588 | OMAP_HSMMC_WRITE(host->base, SYSCTL, regval); |
| 1589 | OMAP_HSMMC_WRITE(host->base, SYSCTL, |
| 1590 | OMAP_HSMMC_READ(host->base, SYSCTL) | ICE); |
| 1591 | |
| 1592 | /* Wait till the ICS bit is set */ |
| 1593 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 1594 | while ((OMAP_HSMMC_READ(host->base, SYSCTL) & ICS) != ICS |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1595 | && time_before(jiffies, timeout)) |
| 1596 | msleep(1); |
| 1597 | |
| 1598 | OMAP_HSMMC_WRITE(host->base, SYSCTL, |
| 1599 | OMAP_HSMMC_READ(host->base, SYSCTL) | CEN); |
| 1600 | |
Adrian Hunter | a362146 | 2009-09-22 16:44:42 -0700 | [diff] [blame] | 1601 | if (do_send_init_stream) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1602 | send_init_stream(host); |
| 1603 | |
Denis Karpov | abb28e7 | 2009-09-22 16:44:44 -0700 | [diff] [blame] | 1604 | con = OMAP_HSMMC_READ(host->base, CON); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1605 | if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) |
Denis Karpov | abb28e7 | 2009-09-22 16:44:44 -0700 | [diff] [blame] | 1606 | OMAP_HSMMC_WRITE(host->base, CON, con | OD); |
| 1607 | else |
| 1608 | OMAP_HSMMC_WRITE(host->base, CON, con & ~OD); |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 1609 | |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1610 | if (host->power_mode == MMC_POWER_OFF) |
| 1611 | mmc_host_disable(host->mmc); |
| 1612 | else |
| 1613 | mmc_host_lazy_disable(host->mmc); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1614 | } |
| 1615 | |
| 1616 | static int omap_hsmmc_get_cd(struct mmc_host *mmc) |
| 1617 | { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1618 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1619 | |
Denis Karpov | 191d1f1 | 2009-09-22 16:44:55 -0700 | [diff] [blame] | 1620 | if (!mmc_slot(host).card_detect) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1621 | return -ENOSYS; |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 1622 | return mmc_slot(host).card_detect(host->dev, host->slot_id); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1623 | } |
| 1624 | |
| 1625 | static int omap_hsmmc_get_ro(struct mmc_host *mmc) |
| 1626 | { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1627 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1628 | |
Denis Karpov | 191d1f1 | 2009-09-22 16:44:55 -0700 | [diff] [blame] | 1629 | if (!mmc_slot(host).get_ro) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1630 | return -ENOSYS; |
Denis Karpov | 191d1f1 | 2009-09-22 16:44:55 -0700 | [diff] [blame] | 1631 | return mmc_slot(host).get_ro(host->dev, 0); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1632 | } |
| 1633 | |
Grazvydas Ignotas | 4816858 | 2010-08-10 18:01:52 -0700 | [diff] [blame] | 1634 | static void omap_hsmmc_init_card(struct mmc_host *mmc, struct mmc_card *card) |
| 1635 | { |
| 1636 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
| 1637 | |
| 1638 | if (mmc_slot(host).init_card) |
| 1639 | mmc_slot(host).init_card(card); |
| 1640 | } |
| 1641 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1642 | static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host) |
Kim Kyuwon | 1b331e6 | 2009-02-20 13:10:08 +0100 | [diff] [blame] | 1643 | { |
| 1644 | u32 hctl, capa, value; |
| 1645 | |
| 1646 | /* Only MMC1 supports 3.0V */ |
| 1647 | if (host->id == OMAP_MMC1_DEVID) { |
| 1648 | hctl = SDVS30; |
| 1649 | capa = VS30 | VS18; |
| 1650 | } else { |
| 1651 | hctl = SDVS18; |
| 1652 | capa = VS18; |
| 1653 | } |
| 1654 | |
| 1655 | value = OMAP_HSMMC_READ(host->base, HCTL) & ~SDVS_MASK; |
| 1656 | OMAP_HSMMC_WRITE(host->base, HCTL, value | hctl); |
| 1657 | |
| 1658 | value = OMAP_HSMMC_READ(host->base, CAPA); |
| 1659 | OMAP_HSMMC_WRITE(host->base, CAPA, value | capa); |
| 1660 | |
| 1661 | /* Set the controller to AUTO IDLE mode */ |
| 1662 | value = OMAP_HSMMC_READ(host->base, SYSCONFIG); |
| 1663 | OMAP_HSMMC_WRITE(host->base, SYSCONFIG, value | AUTOIDLE); |
| 1664 | |
| 1665 | /* Set SD bus power bit */ |
Adrian Hunter | e13bb30 | 2009-03-12 17:08:26 +0200 | [diff] [blame] | 1666 | set_sd_bus_power(host); |
Kim Kyuwon | 1b331e6 | 2009-02-20 13:10:08 +0100 | [diff] [blame] | 1667 | } |
| 1668 | |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1669 | /* |
| 1670 | * Dynamic power saving handling, FSM: |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1671 | * ENABLED -> DISABLED -> CARDSLEEP / REGSLEEP -> OFF |
| 1672 | * ^___________| | | |
| 1673 | * |______________________|______________________| |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1674 | * |
| 1675 | * ENABLED: mmc host is fully functional |
| 1676 | * DISABLED: fclk is off |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1677 | * CARDSLEEP: fclk is off, card is asleep, voltage regulator is asleep |
| 1678 | * REGSLEEP: fclk is off, voltage regulator is asleep |
| 1679 | * OFF: fclk is off, voltage regulator is off |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1680 | * |
| 1681 | * Transition handlers return the timeout for the next state transition |
| 1682 | * or negative error. |
| 1683 | */ |
| 1684 | |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1685 | enum {ENABLED = 0, DISABLED, CARDSLEEP, REGSLEEP, OFF}; |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1686 | |
| 1687 | /* Handler for [ENABLED -> DISABLED] transition */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1688 | static int omap_hsmmc_enabled_to_disabled(struct omap_hsmmc_host *host) |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1689 | { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1690 | omap_hsmmc_context_save(host); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1691 | clk_disable(host->fclk); |
| 1692 | host->dpm_state = DISABLED; |
| 1693 | |
| 1694 | dev_dbg(mmc_dev(host->mmc), "ENABLED -> DISABLED\n"); |
| 1695 | |
| 1696 | if (host->power_mode == MMC_POWER_OFF) |
| 1697 | return 0; |
| 1698 | |
Adrian Hunter | 4380eea | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 1699 | return OMAP_MMC_SLEEP_TIMEOUT; |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1700 | } |
| 1701 | |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1702 | /* Handler for [DISABLED -> REGSLEEP / CARDSLEEP] transition */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1703 | static int omap_hsmmc_disabled_to_sleep(struct omap_hsmmc_host *host) |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1704 | { |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1705 | int err, new_state; |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1706 | |
| 1707 | if (!mmc_try_claim_host(host->mmc)) |
| 1708 | return 0; |
| 1709 | |
| 1710 | clk_enable(host->fclk); |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1711 | omap_hsmmc_context_restore(host); |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1712 | if (mmc_card_can_sleep(host->mmc)) { |
| 1713 | err = mmc_card_sleep(host->mmc); |
| 1714 | if (err < 0) { |
| 1715 | clk_disable(host->fclk); |
| 1716 | mmc_release_host(host->mmc); |
| 1717 | return err; |
| 1718 | } |
| 1719 | new_state = CARDSLEEP; |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1720 | } else { |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1721 | new_state = REGSLEEP; |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1722 | } |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1723 | if (mmc_slot(host).set_sleep) |
| 1724 | mmc_slot(host).set_sleep(host->dev, host->slot_id, 1, 0, |
| 1725 | new_state == CARDSLEEP); |
| 1726 | /* FIXME: turn off bus power and perhaps interrupts too */ |
| 1727 | clk_disable(host->fclk); |
| 1728 | host->dpm_state = new_state; |
| 1729 | |
| 1730 | mmc_release_host(host->mmc); |
| 1731 | |
| 1732 | dev_dbg(mmc_dev(host->mmc), "DISABLED -> %s\n", |
| 1733 | host->dpm_state == CARDSLEEP ? "CARDSLEEP" : "REGSLEEP"); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1734 | |
Adrian Hunter | 1df58db | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 1735 | if (mmc_slot(host).no_off) |
| 1736 | return 0; |
| 1737 | |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1738 | if ((host->mmc->caps & MMC_CAP_NONREMOVABLE) || |
| 1739 | mmc_slot(host).card_detect || |
| 1740 | (mmc_slot(host).get_cover_state && |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1741 | mmc_slot(host).get_cover_state(host->dev, host->slot_id))) |
Adrian Hunter | 4380eea | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 1742 | return OMAP_MMC_OFF_TIMEOUT; |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1743 | |
| 1744 | return 0; |
| 1745 | } |
| 1746 | |
| 1747 | /* Handler for [REGSLEEP / CARDSLEEP -> OFF] transition */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1748 | static int omap_hsmmc_sleep_to_off(struct omap_hsmmc_host *host) |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1749 | { |
| 1750 | if (!mmc_try_claim_host(host->mmc)) |
| 1751 | return 0; |
| 1752 | |
Adrian Hunter | 1df58db | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 1753 | if (mmc_slot(host).no_off) |
| 1754 | return 0; |
| 1755 | |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1756 | if (!((host->mmc->caps & MMC_CAP_NONREMOVABLE) || |
| 1757 | mmc_slot(host).card_detect || |
| 1758 | (mmc_slot(host).get_cover_state && |
| 1759 | mmc_slot(host).get_cover_state(host->dev, host->slot_id)))) { |
| 1760 | mmc_release_host(host->mmc); |
| 1761 | return 0; |
Adrian Hunter | 623821f | 2009-09-22 16:44:51 -0700 | [diff] [blame] | 1762 | } |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1763 | |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1764 | mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0); |
| 1765 | host->vdd = 0; |
| 1766 | host->power_mode = MMC_POWER_OFF; |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1767 | |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1768 | dev_dbg(mmc_dev(host->mmc), "%s -> OFF\n", |
| 1769 | host->dpm_state == CARDSLEEP ? "CARDSLEEP" : "REGSLEEP"); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1770 | |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1771 | host->dpm_state = OFF; |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1772 | |
| 1773 | mmc_release_host(host->mmc); |
| 1774 | |
| 1775 | return 0; |
| 1776 | } |
| 1777 | |
| 1778 | /* Handler for [DISABLED -> ENABLED] transition */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1779 | static int omap_hsmmc_disabled_to_enabled(struct omap_hsmmc_host *host) |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1780 | { |
| 1781 | int err; |
| 1782 | |
| 1783 | err = clk_enable(host->fclk); |
| 1784 | if (err < 0) |
| 1785 | return err; |
| 1786 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1787 | omap_hsmmc_context_restore(host); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1788 | host->dpm_state = ENABLED; |
| 1789 | |
| 1790 | dev_dbg(mmc_dev(host->mmc), "DISABLED -> ENABLED\n"); |
| 1791 | |
| 1792 | return 0; |
| 1793 | } |
| 1794 | |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1795 | /* Handler for [SLEEP -> ENABLED] transition */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1796 | static int omap_hsmmc_sleep_to_enabled(struct omap_hsmmc_host *host) |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1797 | { |
| 1798 | if (!mmc_try_claim_host(host->mmc)) |
| 1799 | return 0; |
| 1800 | |
| 1801 | clk_enable(host->fclk); |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1802 | omap_hsmmc_context_restore(host); |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1803 | if (mmc_slot(host).set_sleep) |
| 1804 | mmc_slot(host).set_sleep(host->dev, host->slot_id, 0, |
| 1805 | host->vdd, host->dpm_state == CARDSLEEP); |
| 1806 | if (mmc_card_can_sleep(host->mmc)) |
| 1807 | mmc_card_awake(host->mmc); |
| 1808 | |
| 1809 | dev_dbg(mmc_dev(host->mmc), "%s -> ENABLED\n", |
| 1810 | host->dpm_state == CARDSLEEP ? "CARDSLEEP" : "REGSLEEP"); |
| 1811 | |
| 1812 | host->dpm_state = ENABLED; |
| 1813 | |
| 1814 | mmc_release_host(host->mmc); |
| 1815 | |
| 1816 | return 0; |
| 1817 | } |
| 1818 | |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1819 | /* Handler for [OFF -> ENABLED] transition */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1820 | static int omap_hsmmc_off_to_enabled(struct omap_hsmmc_host *host) |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1821 | { |
| 1822 | clk_enable(host->fclk); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1823 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1824 | omap_hsmmc_context_restore(host); |
| 1825 | omap_hsmmc_conf_bus_power(host); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1826 | mmc_power_restore_host(host->mmc); |
| 1827 | |
| 1828 | host->dpm_state = ENABLED; |
| 1829 | |
| 1830 | dev_dbg(mmc_dev(host->mmc), "OFF -> ENABLED\n"); |
| 1831 | |
| 1832 | return 0; |
| 1833 | } |
| 1834 | |
| 1835 | /* |
| 1836 | * Bring MMC host to ENABLED from any other PM state. |
| 1837 | */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1838 | static int omap_hsmmc_enable(struct mmc_host *mmc) |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1839 | { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1840 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1841 | |
| 1842 | switch (host->dpm_state) { |
| 1843 | case DISABLED: |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1844 | return omap_hsmmc_disabled_to_enabled(host); |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1845 | case CARDSLEEP: |
Adrian Hunter | 623821f | 2009-09-22 16:44:51 -0700 | [diff] [blame] | 1846 | case REGSLEEP: |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1847 | return omap_hsmmc_sleep_to_enabled(host); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1848 | case OFF: |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1849 | return omap_hsmmc_off_to_enabled(host); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1850 | default: |
| 1851 | dev_dbg(mmc_dev(host->mmc), "UNKNOWN state\n"); |
| 1852 | return -EINVAL; |
| 1853 | } |
| 1854 | } |
| 1855 | |
| 1856 | /* |
| 1857 | * Bring MMC host in PM state (one level deeper). |
| 1858 | */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1859 | static int omap_hsmmc_disable(struct mmc_host *mmc, int lazy) |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1860 | { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1861 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1862 | |
| 1863 | switch (host->dpm_state) { |
| 1864 | case ENABLED: { |
| 1865 | int delay; |
| 1866 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1867 | delay = omap_hsmmc_enabled_to_disabled(host); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1868 | if (lazy || delay < 0) |
| 1869 | return delay; |
| 1870 | return 0; |
| 1871 | } |
| 1872 | case DISABLED: |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1873 | return omap_hsmmc_disabled_to_sleep(host); |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1874 | case CARDSLEEP: |
| 1875 | case REGSLEEP: |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1876 | return omap_hsmmc_sleep_to_off(host); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1877 | default: |
| 1878 | dev_dbg(mmc_dev(host->mmc), "UNKNOWN state\n"); |
| 1879 | return -EINVAL; |
| 1880 | } |
| 1881 | } |
| 1882 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1883 | static int omap_hsmmc_enable_fclk(struct mmc_host *mmc) |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1884 | { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1885 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1886 | int err; |
| 1887 | |
| 1888 | err = clk_enable(host->fclk); |
| 1889 | if (err) |
| 1890 | return err; |
| 1891 | dev_dbg(mmc_dev(host->mmc), "mmc_fclk: enabled\n"); |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1892 | omap_hsmmc_context_restore(host); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1893 | return 0; |
| 1894 | } |
| 1895 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1896 | static int omap_hsmmc_disable_fclk(struct mmc_host *mmc, int lazy) |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1897 | { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1898 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1899 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1900 | omap_hsmmc_context_save(host); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1901 | clk_disable(host->fclk); |
| 1902 | dev_dbg(mmc_dev(host->mmc), "mmc_fclk: disabled\n"); |
| 1903 | return 0; |
| 1904 | } |
| 1905 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1906 | static const struct mmc_host_ops omap_hsmmc_ops = { |
| 1907 | .enable = omap_hsmmc_enable_fclk, |
| 1908 | .disable = omap_hsmmc_disable_fclk, |
| 1909 | .request = omap_hsmmc_request, |
| 1910 | .set_ios = omap_hsmmc_set_ios, |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1911 | .get_cd = omap_hsmmc_get_cd, |
| 1912 | .get_ro = omap_hsmmc_get_ro, |
Grazvydas Ignotas | 4816858 | 2010-08-10 18:01:52 -0700 | [diff] [blame] | 1913 | .init_card = omap_hsmmc_init_card, |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1914 | /* NYET -- enable_sdio_irq */ |
| 1915 | }; |
| 1916 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1917 | static const struct mmc_host_ops omap_hsmmc_ps_ops = { |
| 1918 | .enable = omap_hsmmc_enable, |
| 1919 | .disable = omap_hsmmc_disable, |
| 1920 | .request = omap_hsmmc_request, |
| 1921 | .set_ios = omap_hsmmc_set_ios, |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1922 | .get_cd = omap_hsmmc_get_cd, |
| 1923 | .get_ro = omap_hsmmc_get_ro, |
Grazvydas Ignotas | 4816858 | 2010-08-10 18:01:52 -0700 | [diff] [blame] | 1924 | .init_card = omap_hsmmc_init_card, |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 1925 | /* NYET -- enable_sdio_irq */ |
| 1926 | }; |
| 1927 | |
Denis Karpov | d900f71 | 2009-09-22 16:44:38 -0700 | [diff] [blame] | 1928 | #ifdef CONFIG_DEBUG_FS |
| 1929 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1930 | static int omap_hsmmc_regs_show(struct seq_file *s, void *data) |
Denis Karpov | d900f71 | 2009-09-22 16:44:38 -0700 | [diff] [blame] | 1931 | { |
| 1932 | struct mmc_host *mmc = s->private; |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1933 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 1934 | int context_loss = 0; |
| 1935 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1936 | if (host->pdata->get_context_loss_count) |
| 1937 | context_loss = host->pdata->get_context_loss_count(host->dev); |
Denis Karpov | d900f71 | 2009-09-22 16:44:38 -0700 | [diff] [blame] | 1938 | |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 1939 | seq_printf(s, "mmc%d:\n" |
| 1940 | " enabled:\t%d\n" |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1941 | " dpm_state:\t%d\n" |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 1942 | " nesting_cnt:\t%d\n" |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 1943 | " ctx_loss:\t%d:%d\n" |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 1944 | "\nregs:\n", |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1945 | mmc->index, mmc->enabled ? 1 : 0, |
| 1946 | host->dpm_state, mmc->nesting_cnt, |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 1947 | host->context_loss, context_loss); |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 1948 | |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 1949 | if (host->suspended || host->dpm_state == OFF) { |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1950 | seq_printf(s, "host suspended, can't read registers\n"); |
| 1951 | return 0; |
| 1952 | } |
| 1953 | |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 1954 | if (clk_enable(host->fclk) != 0) { |
| 1955 | seq_printf(s, "can't read the regs\n"); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1956 | return 0; |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 1957 | } |
Denis Karpov | d900f71 | 2009-09-22 16:44:38 -0700 | [diff] [blame] | 1958 | |
| 1959 | seq_printf(s, "SYSCONFIG:\t0x%08x\n", |
| 1960 | OMAP_HSMMC_READ(host->base, SYSCONFIG)); |
| 1961 | seq_printf(s, "CON:\t\t0x%08x\n", |
| 1962 | OMAP_HSMMC_READ(host->base, CON)); |
| 1963 | seq_printf(s, "HCTL:\t\t0x%08x\n", |
| 1964 | OMAP_HSMMC_READ(host->base, HCTL)); |
| 1965 | seq_printf(s, "SYSCTL:\t\t0x%08x\n", |
| 1966 | OMAP_HSMMC_READ(host->base, SYSCTL)); |
| 1967 | seq_printf(s, "IE:\t\t0x%08x\n", |
| 1968 | OMAP_HSMMC_READ(host->base, IE)); |
| 1969 | seq_printf(s, "ISE:\t\t0x%08x\n", |
| 1970 | OMAP_HSMMC_READ(host->base, ISE)); |
| 1971 | seq_printf(s, "CAPA:\t\t0x%08x\n", |
| 1972 | OMAP_HSMMC_READ(host->base, CAPA)); |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 1973 | |
| 1974 | clk_disable(host->fclk); |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 1975 | |
Denis Karpov | d900f71 | 2009-09-22 16:44:38 -0700 | [diff] [blame] | 1976 | return 0; |
| 1977 | } |
| 1978 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1979 | static int omap_hsmmc_regs_open(struct inode *inode, struct file *file) |
Denis Karpov | d900f71 | 2009-09-22 16:44:38 -0700 | [diff] [blame] | 1980 | { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1981 | return single_open(file, omap_hsmmc_regs_show, inode->i_private); |
Denis Karpov | d900f71 | 2009-09-22 16:44:38 -0700 | [diff] [blame] | 1982 | } |
| 1983 | |
| 1984 | static const struct file_operations mmc_regs_fops = { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1985 | .open = omap_hsmmc_regs_open, |
Denis Karpov | d900f71 | 2009-09-22 16:44:38 -0700 | [diff] [blame] | 1986 | .read = seq_read, |
| 1987 | .llseek = seq_lseek, |
| 1988 | .release = single_release, |
| 1989 | }; |
| 1990 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 1991 | static void omap_hsmmc_debugfs(struct mmc_host *mmc) |
Denis Karpov | d900f71 | 2009-09-22 16:44:38 -0700 | [diff] [blame] | 1992 | { |
| 1993 | if (mmc->debugfs_root) |
| 1994 | debugfs_create_file("regs", S_IRUSR, mmc->debugfs_root, |
| 1995 | mmc, &mmc_regs_fops); |
| 1996 | } |
| 1997 | |
| 1998 | #else |
| 1999 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2000 | static void omap_hsmmc_debugfs(struct mmc_host *mmc) |
Denis Karpov | d900f71 | 2009-09-22 16:44:38 -0700 | [diff] [blame] | 2001 | { |
| 2002 | } |
| 2003 | |
| 2004 | #endif |
| 2005 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2006 | static int __init omap_hsmmc_probe(struct platform_device *pdev) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2007 | { |
| 2008 | struct omap_mmc_platform_data *pdata = pdev->dev.platform_data; |
| 2009 | struct mmc_host *mmc; |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2010 | struct omap_hsmmc_host *host = NULL; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2011 | struct resource *res; |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 2012 | int ret, irq; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2013 | |
| 2014 | if (pdata == NULL) { |
| 2015 | dev_err(&pdev->dev, "Platform Data is missing\n"); |
| 2016 | return -ENXIO; |
| 2017 | } |
| 2018 | |
| 2019 | if (pdata->nr_slots == 0) { |
| 2020 | dev_err(&pdev->dev, "No Slots\n"); |
| 2021 | return -ENXIO; |
| 2022 | } |
| 2023 | |
| 2024 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 2025 | irq = platform_get_irq(pdev, 0); |
| 2026 | if (res == NULL || irq < 0) |
| 2027 | return -ENXIO; |
| 2028 | |
kishore kadiyala | 91a0b08 | 2010-10-01 16:35:28 -0700 | [diff] [blame] | 2029 | res->start += pdata->reg_offset; |
| 2030 | res->end += pdata->reg_offset; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2031 | res = request_mem_region(res->start, res->end - res->start + 1, |
| 2032 | pdev->name); |
| 2033 | if (res == NULL) |
| 2034 | return -EBUSY; |
| 2035 | |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 2036 | ret = omap_hsmmc_gpio_init(pdata); |
| 2037 | if (ret) |
| 2038 | goto err; |
| 2039 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2040 | mmc = mmc_alloc_host(sizeof(struct omap_hsmmc_host), &pdev->dev); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2041 | if (!mmc) { |
| 2042 | ret = -ENOMEM; |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 2043 | goto err_alloc; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2044 | } |
| 2045 | |
| 2046 | host = mmc_priv(mmc); |
| 2047 | host->mmc = mmc; |
| 2048 | host->pdata = pdata; |
| 2049 | host->dev = &pdev->dev; |
| 2050 | host->use_dma = 1; |
| 2051 | host->dev->dma_mask = &pdata->dma_mask; |
| 2052 | host->dma_ch = -1; |
| 2053 | host->irq = irq; |
| 2054 | host->id = pdev->id; |
| 2055 | host->slot_id = 0; |
| 2056 | host->mapbase = res->start; |
| 2057 | host->base = ioremap(host->mapbase, SZ_4K); |
Adrian Hunter | 6da20c8 | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 2058 | host->power_mode = MMC_POWER_OFF; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2059 | |
| 2060 | platform_set_drvdata(pdev, host); |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2061 | INIT_WORK(&host->mmc_carddetect_work, omap_hsmmc_detect); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2062 | |
Denis Karpov | 191d1f1 | 2009-09-22 16:44:55 -0700 | [diff] [blame] | 2063 | if (mmc_slot(host).power_saving) |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2064 | mmc->ops = &omap_hsmmc_ps_ops; |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 2065 | else |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2066 | mmc->ops = &omap_hsmmc_ops; |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 2067 | |
Adrian Hunter | e0eb242 | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 2068 | /* |
| 2069 | * If regulator_disable can only put vcc_aux to sleep then there is |
| 2070 | * no off state. |
| 2071 | */ |
| 2072 | if (mmc_slot(host).vcc_aux_disable_is_sleep) |
| 2073 | mmc_slot(host).no_off = 1; |
| 2074 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2075 | mmc->f_min = 400000; |
| 2076 | mmc->f_max = 52000000; |
| 2077 | |
Adrian Hunter | 4dffd7a | 2009-09-22 16:44:58 -0700 | [diff] [blame] | 2078 | spin_lock_init(&host->irq_lock); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2079 | |
Russell King | 6f7607c | 2009-01-28 10:22:50 +0000 | [diff] [blame] | 2080 | host->iclk = clk_get(&pdev->dev, "ick"); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2081 | if (IS_ERR(host->iclk)) { |
| 2082 | ret = PTR_ERR(host->iclk); |
| 2083 | host->iclk = NULL; |
| 2084 | goto err1; |
| 2085 | } |
Russell King | 6f7607c | 2009-01-28 10:22:50 +0000 | [diff] [blame] | 2086 | host->fclk = clk_get(&pdev->dev, "fck"); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2087 | if (IS_ERR(host->fclk)) { |
| 2088 | ret = PTR_ERR(host->fclk); |
| 2089 | host->fclk = NULL; |
| 2090 | clk_put(host->iclk); |
| 2091 | goto err1; |
| 2092 | } |
| 2093 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2094 | omap_hsmmc_context_save(host); |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 2095 | |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 2096 | mmc->caps |= MMC_CAP_DISABLE; |
Denis Karpov | dd498ef | 2009-09-22 16:44:49 -0700 | [diff] [blame] | 2097 | mmc_set_disable_delay(mmc, OMAP_MMC_DISABLED_TIMEOUT); |
| 2098 | /* we start off in DISABLED state */ |
| 2099 | host->dpm_state = DISABLED; |
| 2100 | |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 2101 | if (mmc_host_enable(host->mmc) != 0) { |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2102 | clk_put(host->iclk); |
| 2103 | clk_put(host->fclk); |
| 2104 | goto err1; |
| 2105 | } |
| 2106 | |
| 2107 | if (clk_enable(host->iclk) != 0) { |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 2108 | mmc_host_disable(host->mmc); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2109 | clk_put(host->iclk); |
| 2110 | clk_put(host->fclk); |
| 2111 | goto err1; |
| 2112 | } |
| 2113 | |
Adrian Hunter | 2bec089 | 2009-09-22 16:45:02 -0700 | [diff] [blame] | 2114 | if (cpu_is_omap2430()) { |
| 2115 | host->dbclk = clk_get(&pdev->dev, "mmchsdb_fck"); |
| 2116 | /* |
| 2117 | * MMC can still work without debounce clock. |
| 2118 | */ |
| 2119 | if (IS_ERR(host->dbclk)) |
| 2120 | dev_warn(mmc_dev(host->mmc), |
| 2121 | "Failed to get debounce clock\n"); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2122 | else |
Adrian Hunter | 2bec089 | 2009-09-22 16:45:02 -0700 | [diff] [blame] | 2123 | host->got_dbclk = 1; |
| 2124 | |
| 2125 | if (host->got_dbclk) |
| 2126 | if (clk_enable(host->dbclk) != 0) |
| 2127 | dev_dbg(mmc_dev(host->mmc), "Enabling debounce" |
| 2128 | " clk failed\n"); |
| 2129 | } |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2130 | |
Juha Yrjola | 0ccd76d | 2008-11-14 15:22:00 +0200 | [diff] [blame] | 2131 | /* Since we do only SG emulation, we can have as many segs |
| 2132 | * as we want. */ |
| 2133 | mmc->max_phys_segs = 1024; |
| 2134 | mmc->max_hw_segs = 1024; |
| 2135 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2136 | mmc->max_blk_size = 512; /* Block Length at max can be 1024 */ |
| 2137 | mmc->max_blk_count = 0xFFFF; /* No. of Blocks is 16 bits */ |
| 2138 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; |
| 2139 | mmc->max_seg_size = mmc->max_req_size; |
| 2140 | |
Jarkko Lavinen | 13189e7 | 2009-09-22 16:44:53 -0700 | [diff] [blame] | 2141 | mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED | |
Adrian Hunter | 93caf8e69 | 2010-08-11 14:17:48 -0700 | [diff] [blame] | 2142 | MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_ERASE; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2143 | |
Sukumar Ghorai | 3a63833 | 2010-09-15 14:49:23 +0000 | [diff] [blame] | 2144 | mmc->caps |= mmc_slot(host).caps; |
| 2145 | if (mmc->caps & MMC_CAP_8_BIT_DATA) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2146 | mmc->caps |= MMC_CAP_4_BIT_DATA; |
| 2147 | |
Denis Karpov | 191d1f1 | 2009-09-22 16:44:55 -0700 | [diff] [blame] | 2148 | if (mmc_slot(host).nonremovable) |
Adrian Hunter | 23d99bb | 2009-09-22 16:44:48 -0700 | [diff] [blame] | 2149 | mmc->caps |= MMC_CAP_NONREMOVABLE; |
| 2150 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2151 | omap_hsmmc_conf_bus_power(host); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2152 | |
Grazvydas Ignotas | f3e2f1d | 2009-01-03 10:36:13 +0000 | [diff] [blame] | 2153 | /* Select DMA lines */ |
| 2154 | switch (host->id) { |
| 2155 | case OMAP_MMC1_DEVID: |
| 2156 | host->dma_line_tx = OMAP24XX_DMA_MMC1_TX; |
| 2157 | host->dma_line_rx = OMAP24XX_DMA_MMC1_RX; |
| 2158 | break; |
| 2159 | case OMAP_MMC2_DEVID: |
| 2160 | host->dma_line_tx = OMAP24XX_DMA_MMC2_TX; |
| 2161 | host->dma_line_rx = OMAP24XX_DMA_MMC2_RX; |
| 2162 | break; |
| 2163 | case OMAP_MMC3_DEVID: |
| 2164 | host->dma_line_tx = OMAP34XX_DMA_MMC3_TX; |
| 2165 | host->dma_line_rx = OMAP34XX_DMA_MMC3_RX; |
| 2166 | break; |
kishore kadiyala | 82cf818 | 2009-09-22 16:45:25 -0700 | [diff] [blame] | 2167 | case OMAP_MMC4_DEVID: |
| 2168 | host->dma_line_tx = OMAP44XX_DMA_MMC4_TX; |
| 2169 | host->dma_line_rx = OMAP44XX_DMA_MMC4_RX; |
| 2170 | break; |
| 2171 | case OMAP_MMC5_DEVID: |
| 2172 | host->dma_line_tx = OMAP44XX_DMA_MMC5_TX; |
| 2173 | host->dma_line_rx = OMAP44XX_DMA_MMC5_RX; |
| 2174 | break; |
Grazvydas Ignotas | f3e2f1d | 2009-01-03 10:36:13 +0000 | [diff] [blame] | 2175 | default: |
| 2176 | dev_err(mmc_dev(host->mmc), "Invalid MMC id\n"); |
| 2177 | goto err_irq; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2178 | } |
| 2179 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2180 | /* Request IRQ for MMC operations */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2181 | ret = request_irq(host->irq, omap_hsmmc_irq, IRQF_DISABLED, |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2182 | mmc_hostname(mmc), host); |
| 2183 | if (ret) { |
| 2184 | dev_dbg(mmc_dev(host->mmc), "Unable to grab HSMMC IRQ\n"); |
| 2185 | goto err_irq; |
| 2186 | } |
| 2187 | |
| 2188 | if (pdata->init != NULL) { |
| 2189 | if (pdata->init(&pdev->dev) != 0) { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2190 | dev_dbg(mmc_dev(host->mmc), |
| 2191 | "Unable to configure MMC IRQs\n"); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2192 | goto err_irq_cd_init; |
| 2193 | } |
| 2194 | } |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 2195 | |
Adrian Hunter | b702b10 | 2010-02-15 10:03:35 -0800 | [diff] [blame] | 2196 | if (omap_hsmmc_have_reg() && !mmc_slot(host).set_power) { |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 2197 | ret = omap_hsmmc_reg_get(host); |
| 2198 | if (ret) |
| 2199 | goto err_reg; |
| 2200 | host->use_reg = 1; |
| 2201 | } |
| 2202 | |
David Brownell | b583f26 | 2009-05-28 14:04:03 -0700 | [diff] [blame] | 2203 | mmc->ocr_avail = mmc_slot(host).ocr_mask; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2204 | |
| 2205 | /* Request IRQ for card detect */ |
Adrian Hunter | e1a55f5 | 2009-01-26 13:17:25 +0200 | [diff] [blame] | 2206 | if ((mmc_slot(host).card_detect_irq)) { |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2207 | ret = request_irq(mmc_slot(host).card_detect_irq, |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2208 | omap_hsmmc_cd_handler, |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2209 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
| 2210 | | IRQF_DISABLED, |
| 2211 | mmc_hostname(mmc), host); |
| 2212 | if (ret) { |
| 2213 | dev_dbg(mmc_dev(host->mmc), |
| 2214 | "Unable to grab MMC CD IRQ\n"); |
| 2215 | goto err_irq_cd; |
| 2216 | } |
| 2217 | } |
| 2218 | |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 2219 | omap_hsmmc_disable_irq(host); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2220 | |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 2221 | mmc_host_lazy_disable(host->mmc); |
| 2222 | |
Adrian Hunter | b62f622 | 2009-09-22 16:45:01 -0700 | [diff] [blame] | 2223 | omap_hsmmc_protect_card(host); |
| 2224 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2225 | mmc_add_host(mmc); |
| 2226 | |
Denis Karpov | 191d1f1 | 2009-09-22 16:44:55 -0700 | [diff] [blame] | 2227 | if (mmc_slot(host).name != NULL) { |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2228 | ret = device_create_file(&mmc->class_dev, &dev_attr_slot_name); |
| 2229 | if (ret < 0) |
| 2230 | goto err_slot_name; |
| 2231 | } |
Denis Karpov | 191d1f1 | 2009-09-22 16:44:55 -0700 | [diff] [blame] | 2232 | if (mmc_slot(host).card_detect_irq && mmc_slot(host).get_cover_state) { |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2233 | ret = device_create_file(&mmc->class_dev, |
| 2234 | &dev_attr_cover_switch); |
| 2235 | if (ret < 0) |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 2236 | goto err_slot_name; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2237 | } |
| 2238 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2239 | omap_hsmmc_debugfs(mmc); |
Denis Karpov | d900f71 | 2009-09-22 16:44:38 -0700 | [diff] [blame] | 2240 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2241 | return 0; |
| 2242 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2243 | err_slot_name: |
| 2244 | mmc_remove_host(mmc); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2245 | free_irq(mmc_slot(host).card_detect_irq, host); |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 2246 | err_irq_cd: |
| 2247 | if (host->use_reg) |
| 2248 | omap_hsmmc_reg_put(host); |
| 2249 | err_reg: |
| 2250 | if (host->pdata->cleanup) |
| 2251 | host->pdata->cleanup(&pdev->dev); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2252 | err_irq_cd_init: |
| 2253 | free_irq(host->irq, host); |
| 2254 | err_irq: |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 2255 | mmc_host_disable(host->mmc); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2256 | clk_disable(host->iclk); |
| 2257 | clk_put(host->fclk); |
| 2258 | clk_put(host->iclk); |
Adrian Hunter | 2bec089 | 2009-09-22 16:45:02 -0700 | [diff] [blame] | 2259 | if (host->got_dbclk) { |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2260 | clk_disable(host->dbclk); |
| 2261 | clk_put(host->dbclk); |
| 2262 | } |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2263 | err1: |
| 2264 | iounmap(host->base); |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 2265 | platform_set_drvdata(pdev, NULL); |
| 2266 | mmc_free_host(mmc); |
| 2267 | err_alloc: |
| 2268 | omap_hsmmc_gpio_free(pdata); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2269 | err: |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2270 | release_mem_region(res->start, res->end - res->start + 1); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2271 | return ret; |
| 2272 | } |
| 2273 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2274 | static int omap_hsmmc_remove(struct platform_device *pdev) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2275 | { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2276 | struct omap_hsmmc_host *host = platform_get_drvdata(pdev); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2277 | struct resource *res; |
| 2278 | |
| 2279 | if (host) { |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 2280 | mmc_host_enable(host->mmc); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2281 | mmc_remove_host(host->mmc); |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 2282 | if (host->use_reg) |
| 2283 | omap_hsmmc_reg_put(host); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2284 | if (host->pdata->cleanup) |
| 2285 | host->pdata->cleanup(&pdev->dev); |
| 2286 | free_irq(host->irq, host); |
| 2287 | if (mmc_slot(host).card_detect_irq) |
| 2288 | free_irq(mmc_slot(host).card_detect_irq, host); |
| 2289 | flush_scheduled_work(); |
| 2290 | |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 2291 | mmc_host_disable(host->mmc); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2292 | clk_disable(host->iclk); |
| 2293 | clk_put(host->fclk); |
| 2294 | clk_put(host->iclk); |
Adrian Hunter | 2bec089 | 2009-09-22 16:45:02 -0700 | [diff] [blame] | 2295 | if (host->got_dbclk) { |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2296 | clk_disable(host->dbclk); |
| 2297 | clk_put(host->dbclk); |
| 2298 | } |
| 2299 | |
| 2300 | mmc_free_host(host->mmc); |
| 2301 | iounmap(host->base); |
Adrian Hunter | db0fefc | 2010-02-15 10:03:34 -0800 | [diff] [blame] | 2302 | omap_hsmmc_gpio_free(pdev->dev.platform_data); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2303 | } |
| 2304 | |
| 2305 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 2306 | if (res) |
| 2307 | release_mem_region(res->start, res->end - res->start + 1); |
| 2308 | platform_set_drvdata(pdev, NULL); |
| 2309 | |
| 2310 | return 0; |
| 2311 | } |
| 2312 | |
| 2313 | #ifdef CONFIG_PM |
Kevin Hilman | a791daa | 2010-05-26 14:42:07 -0700 | [diff] [blame] | 2314 | static int omap_hsmmc_suspend(struct device *dev) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2315 | { |
| 2316 | int ret = 0; |
Kevin Hilman | a791daa | 2010-05-26 14:42:07 -0700 | [diff] [blame] | 2317 | struct platform_device *pdev = to_platform_device(dev); |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2318 | struct omap_hsmmc_host *host = platform_get_drvdata(pdev); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2319 | |
| 2320 | if (host && host->suspended) |
| 2321 | return 0; |
| 2322 | |
| 2323 | if (host) { |
Adrian Hunter | a6b2240 | 2009-09-22 16:44:45 -0700 | [diff] [blame] | 2324 | host->suspended = 1; |
| 2325 | if (host->pdata->suspend) { |
| 2326 | ret = host->pdata->suspend(&pdev->dev, |
| 2327 | host->slot_id); |
| 2328 | if (ret) { |
| 2329 | dev_dbg(mmc_dev(host->mmc), |
| 2330 | "Unable to handle MMC board" |
| 2331 | " level suspend\n"); |
| 2332 | host->suspended = 0; |
| 2333 | return ret; |
| 2334 | } |
| 2335 | } |
| 2336 | cancel_work_sync(&host->mmc_carddetect_work); |
Matt Fleming | 1a13f8f | 2010-05-26 14:42:08 -0700 | [diff] [blame] | 2337 | ret = mmc_suspend_host(host->mmc); |
Ethan Du | e7cb756 | 2010-09-09 16:37:49 -0700 | [diff] [blame] | 2338 | mmc_host_enable(host->mmc); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2339 | if (ret == 0) { |
Adrian Hunter | b417577 | 2010-05-26 14:42:06 -0700 | [diff] [blame] | 2340 | omap_hsmmc_disable_irq(host); |
Jarkko Lavinen | 0683af4 | 2009-03-12 15:30:58 +0200 | [diff] [blame] | 2341 | OMAP_HSMMC_WRITE(host->base, HCTL, |
Denis Karpov | 191d1f1 | 2009-09-22 16:44:55 -0700 | [diff] [blame] | 2342 | OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP); |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 2343 | mmc_host_disable(host->mmc); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2344 | clk_disable(host->iclk); |
Adrian Hunter | 2bec089 | 2009-09-22 16:45:02 -0700 | [diff] [blame] | 2345 | if (host->got_dbclk) |
| 2346 | clk_disable(host->dbclk); |
Adrian Hunter | a6b2240 | 2009-09-22 16:44:45 -0700 | [diff] [blame] | 2347 | } else { |
| 2348 | host->suspended = 0; |
| 2349 | if (host->pdata->resume) { |
| 2350 | ret = host->pdata->resume(&pdev->dev, |
| 2351 | host->slot_id); |
| 2352 | if (ret) |
| 2353 | dev_dbg(mmc_dev(host->mmc), |
| 2354 | "Unmask interrupt failed\n"); |
| 2355 | } |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 2356 | mmc_host_disable(host->mmc); |
Adrian Hunter | a6b2240 | 2009-09-22 16:44:45 -0700 | [diff] [blame] | 2357 | } |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2358 | |
| 2359 | } |
| 2360 | return ret; |
| 2361 | } |
| 2362 | |
| 2363 | /* Routine to resume the MMC device */ |
Kevin Hilman | a791daa | 2010-05-26 14:42:07 -0700 | [diff] [blame] | 2364 | static int omap_hsmmc_resume(struct device *dev) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2365 | { |
| 2366 | int ret = 0; |
Kevin Hilman | a791daa | 2010-05-26 14:42:07 -0700 | [diff] [blame] | 2367 | struct platform_device *pdev = to_platform_device(dev); |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2368 | struct omap_hsmmc_host *host = platform_get_drvdata(pdev); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2369 | |
| 2370 | if (host && !host->suspended) |
| 2371 | return 0; |
| 2372 | |
| 2373 | if (host) { |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2374 | ret = clk_enable(host->iclk); |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 2375 | if (ret) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2376 | goto clk_en_err; |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2377 | |
Denis Karpov | 11dd62a | 2009-09-22 16:44:43 -0700 | [diff] [blame] | 2378 | if (mmc_host_enable(host->mmc) != 0) { |
| 2379 | clk_disable(host->iclk); |
| 2380 | goto clk_en_err; |
| 2381 | } |
| 2382 | |
Adrian Hunter | 2bec089 | 2009-09-22 16:45:02 -0700 | [diff] [blame] | 2383 | if (host->got_dbclk) |
| 2384 | clk_enable(host->dbclk); |
| 2385 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2386 | omap_hsmmc_conf_bus_power(host); |
Kim Kyuwon | 1b331e6 | 2009-02-20 13:10:08 +0100 | [diff] [blame] | 2387 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2388 | if (host->pdata->resume) { |
| 2389 | ret = host->pdata->resume(&pdev->dev, host->slot_id); |
| 2390 | if (ret) |
| 2391 | dev_dbg(mmc_dev(host->mmc), |
| 2392 | "Unmask interrupt failed\n"); |
| 2393 | } |
| 2394 | |
Adrian Hunter | b62f622 | 2009-09-22 16:45:01 -0700 | [diff] [blame] | 2395 | omap_hsmmc_protect_card(host); |
| 2396 | |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2397 | /* Notify the core to resume the host */ |
| 2398 | ret = mmc_resume_host(host->mmc); |
| 2399 | if (ret == 0) |
| 2400 | host->suspended = 0; |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2401 | |
Adrian Hunter | 5e2ea61 | 2009-09-22 16:44:39 -0700 | [diff] [blame] | 2402 | mmc_host_lazy_disable(host->mmc); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2403 | } |
| 2404 | |
| 2405 | return ret; |
| 2406 | |
| 2407 | clk_en_err: |
| 2408 | dev_dbg(mmc_dev(host->mmc), |
| 2409 | "Failed to enable MMC clocks during resume\n"); |
| 2410 | return ret; |
| 2411 | } |
| 2412 | |
| 2413 | #else |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2414 | #define omap_hsmmc_suspend NULL |
| 2415 | #define omap_hsmmc_resume NULL |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2416 | #endif |
| 2417 | |
Kevin Hilman | a791daa | 2010-05-26 14:42:07 -0700 | [diff] [blame] | 2418 | static struct dev_pm_ops omap_hsmmc_dev_pm_ops = { |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2419 | .suspend = omap_hsmmc_suspend, |
| 2420 | .resume = omap_hsmmc_resume, |
Kevin Hilman | a791daa | 2010-05-26 14:42:07 -0700 | [diff] [blame] | 2421 | }; |
| 2422 | |
| 2423 | static struct platform_driver omap_hsmmc_driver = { |
| 2424 | .remove = omap_hsmmc_remove, |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2425 | .driver = { |
| 2426 | .name = DRIVER_NAME, |
| 2427 | .owner = THIS_MODULE, |
Kevin Hilman | a791daa | 2010-05-26 14:42:07 -0700 | [diff] [blame] | 2428 | .pm = &omap_hsmmc_dev_pm_ops, |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2429 | }, |
| 2430 | }; |
| 2431 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2432 | static int __init omap_hsmmc_init(void) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2433 | { |
| 2434 | /* Register the MMC driver */ |
Roger Quadros | 8753298 | 2009-10-26 16:49:38 -0700 | [diff] [blame] | 2435 | return platform_driver_probe(&omap_hsmmc_driver, omap_hsmmc_probe); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2436 | } |
| 2437 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2438 | static void __exit omap_hsmmc_cleanup(void) |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2439 | { |
| 2440 | /* Unregister MMC driver */ |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2441 | platform_driver_unregister(&omap_hsmmc_driver); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2442 | } |
| 2443 | |
Denis Karpov | 70a3341 | 2009-09-22 16:44:59 -0700 | [diff] [blame] | 2444 | module_init(omap_hsmmc_init); |
| 2445 | module_exit(omap_hsmmc_cleanup); |
Madhusudhan Chikkature | a45c6cb | 2009-01-23 01:05:23 +0100 | [diff] [blame] | 2446 | |
| 2447 | MODULE_DESCRIPTION("OMAP High Speed Multimedia Card driver"); |
| 2448 | MODULE_LICENSE("GPL"); |
| 2449 | MODULE_ALIAS("platform:" DRIVER_NAME); |
| 2450 | MODULE_AUTHOR("Texas Instruments Inc"); |