Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 1 | /* linux/drivers/mmc/host/sdhci-s3c.c |
| 2 | * |
| 3 | * Copyright 2008 Openmoko Inc. |
| 4 | * Copyright 2008 Simtec Electronics |
| 5 | * Ben Dooks <ben@simtec.co.uk> |
| 6 | * http://armlinux.simtec.co.uk/ |
| 7 | * |
| 8 | * SDHCI (HSMMC) support for Samsung SoC |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/dma-mapping.h> |
| 17 | #include <linux/platform_device.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 18 | #include <linux/slab.h> |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 19 | #include <linux/clk.h> |
| 20 | #include <linux/io.h> |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 21 | #include <linux/gpio.h> |
Mark Brown | 55156d2 | 2011-07-29 15:35:00 +0100 | [diff] [blame] | 22 | #include <linux/module.h> |
Mark Brown | d5e9c02 | 2012-03-03 00:46:41 +0000 | [diff] [blame] | 23 | #include <linux/of.h> |
| 24 | #include <linux/of_gpio.h> |
| 25 | #include <linux/pm.h> |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 26 | #include <linux/pm_runtime.h> |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 27 | |
| 28 | #include <linux/mmc/host.h> |
| 29 | |
| 30 | #include <plat/sdhci.h> |
| 31 | #include <plat/regs-sdhci.h> |
| 32 | |
| 33 | #include "sdhci.h" |
| 34 | |
| 35 | #define MAX_BUS_CLK (4) |
| 36 | |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 37 | /* Number of gpio's used is max data bus width + command and clock lines */ |
| 38 | #define NUM_GPIOS(x) (x + 2) |
| 39 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 40 | /** |
| 41 | * struct sdhci_s3c - S3C SDHCI instance |
| 42 | * @host: The SDHCI host created |
| 43 | * @pdev: The platform device we where created from. |
| 44 | * @ioarea: The resource created when we claimed the IO area. |
| 45 | * @pdata: The platform data for this controller. |
| 46 | * @cur_clk: The index of the current bus clock. |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 47 | * @gpios: List of gpio numbers parsed from device tree. |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 48 | * @clk_io: The clock for the internal bus interface. |
| 49 | * @clk_bus: The clocks that are available for the SD/MMC bus clock. |
| 50 | */ |
| 51 | struct sdhci_s3c { |
| 52 | struct sdhci_host *host; |
| 53 | struct platform_device *pdev; |
| 54 | struct resource *ioarea; |
| 55 | struct s3c_sdhci_platdata *pdata; |
| 56 | unsigned int cur_clk; |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 57 | int ext_cd_irq; |
| 58 | int ext_cd_gpio; |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 59 | int *gpios; |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 60 | |
| 61 | struct clk *clk_io; |
| 62 | struct clk *clk_bus[MAX_BUS_CLK]; |
| 63 | }; |
| 64 | |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 65 | /** |
| 66 | * struct sdhci_s3c_driver_data - S3C SDHCI platform specific driver data |
| 67 | * @sdhci_quirks: sdhci host specific quirks. |
| 68 | * |
| 69 | * Specifies platform specific configuration of sdhci controller. |
| 70 | * Note: A structure for driver specific platform data is used for future |
| 71 | * expansion of its usage. |
| 72 | */ |
| 73 | struct sdhci_s3c_drv_data { |
| 74 | unsigned int sdhci_quirks; |
| 75 | }; |
| 76 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 77 | static inline struct sdhci_s3c *to_s3c(struct sdhci_host *host) |
| 78 | { |
| 79 | return sdhci_priv(host); |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * get_curclk - convert ctrl2 register to clock source number |
| 84 | * @ctrl2: Control2 register value. |
| 85 | */ |
| 86 | static u32 get_curclk(u32 ctrl2) |
| 87 | { |
| 88 | ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; |
| 89 | ctrl2 >>= S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; |
| 90 | |
| 91 | return ctrl2; |
| 92 | } |
| 93 | |
| 94 | static void sdhci_s3c_check_sclk(struct sdhci_host *host) |
| 95 | { |
| 96 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 97 | u32 tmp = readl(host->ioaddr + S3C_SDHCI_CONTROL2); |
| 98 | |
| 99 | if (get_curclk(tmp) != ourhost->cur_clk) { |
| 100 | dev_dbg(&ourhost->pdev->dev, "restored ctrl2 clock setting\n"); |
| 101 | |
| 102 | tmp &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; |
| 103 | tmp |= ourhost->cur_clk << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; |
Jingoo Han | 7003fec | 2011-12-14 13:25:46 +0900 | [diff] [blame] | 104 | writel(tmp, host->ioaddr + S3C_SDHCI_CONTROL2); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 105 | } |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * sdhci_s3c_get_max_clk - callback to get maximum clock frequency. |
| 110 | * @host: The SDHCI host instance. |
| 111 | * |
| 112 | * Callback to return the maximum clock rate acheivable by the controller. |
| 113 | */ |
| 114 | static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host) |
| 115 | { |
| 116 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 117 | struct clk *busclk; |
| 118 | unsigned int rate, max; |
| 119 | int clk; |
| 120 | |
| 121 | /* note, a reset will reset the clock source */ |
| 122 | |
| 123 | sdhci_s3c_check_sclk(host); |
| 124 | |
| 125 | for (max = 0, clk = 0; clk < MAX_BUS_CLK; clk++) { |
| 126 | busclk = ourhost->clk_bus[clk]; |
| 127 | if (!busclk) |
| 128 | continue; |
| 129 | |
| 130 | rate = clk_get_rate(busclk); |
| 131 | if (rate > max) |
| 132 | max = rate; |
| 133 | } |
| 134 | |
| 135 | return max; |
| 136 | } |
| 137 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 138 | /** |
| 139 | * sdhci_s3c_consider_clock - consider one the bus clocks for current setting |
| 140 | * @ourhost: Our SDHCI instance. |
| 141 | * @src: The source clock index. |
| 142 | * @wanted: The clock frequency wanted. |
| 143 | */ |
| 144 | static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost, |
| 145 | unsigned int src, |
| 146 | unsigned int wanted) |
| 147 | { |
| 148 | unsigned long rate; |
| 149 | struct clk *clksrc = ourhost->clk_bus[src]; |
| 150 | int div; |
| 151 | |
| 152 | if (!clksrc) |
| 153 | return UINT_MAX; |
| 154 | |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 155 | /* |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 156 | * If controller uses a non-standard clock division, find the best clock |
| 157 | * speed possible with selected clock source and skip the division. |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 158 | */ |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 159 | if (ourhost->host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) { |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 160 | rate = clk_round_rate(clksrc, wanted); |
| 161 | return wanted - rate; |
| 162 | } |
| 163 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 164 | rate = clk_get_rate(clksrc); |
| 165 | |
| 166 | for (div = 1; div < 256; div *= 2) { |
| 167 | if ((rate / div) <= wanted) |
| 168 | break; |
| 169 | } |
| 170 | |
| 171 | dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n", |
| 172 | src, rate, wanted, rate / div); |
| 173 | |
Jingoo Han | 2ad0b24 | 2012-08-29 14:35:06 +0900 | [diff] [blame] | 174 | return wanted - (rate / div); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 175 | } |
| 176 | |
| 177 | /** |
| 178 | * sdhci_s3c_set_clock - callback on clock change |
| 179 | * @host: The SDHCI host being changed |
| 180 | * @clock: The clock rate being requested. |
| 181 | * |
| 182 | * When the card's clock is going to be changed, look at the new frequency |
| 183 | * and find the best clock source to go with it. |
| 184 | */ |
| 185 | static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock) |
| 186 | { |
| 187 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 188 | unsigned int best = UINT_MAX; |
| 189 | unsigned int delta; |
| 190 | int best_src = 0; |
| 191 | int src; |
| 192 | u32 ctrl; |
| 193 | |
| 194 | /* don't bother if the clock is going off. */ |
| 195 | if (clock == 0) |
| 196 | return; |
| 197 | |
| 198 | for (src = 0; src < MAX_BUS_CLK; src++) { |
| 199 | delta = sdhci_s3c_consider_clock(ourhost, src, clock); |
| 200 | if (delta < best) { |
| 201 | best = delta; |
| 202 | best_src = src; |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | dev_dbg(&ourhost->pdev->dev, |
| 207 | "selected source %d, clock %d, delta %d\n", |
| 208 | best_src, clock, best); |
| 209 | |
| 210 | /* select the new clock source */ |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 211 | if (ourhost->cur_clk != best_src) { |
| 212 | struct clk *clk = ourhost->clk_bus[best_src]; |
| 213 | |
Thomas Abraham | 0f310a05 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 214 | clk_prepare_enable(clk); |
| 215 | clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]); |
Chander Kashyap | e684c46 | 2012-09-14 09:08:49 +0000 | [diff] [blame] | 216 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 217 | /* turn clock off to card before changing clock source */ |
| 218 | writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL); |
| 219 | |
| 220 | ourhost->cur_clk = best_src; |
| 221 | host->max_clk = clk_get_rate(clk); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 222 | |
| 223 | ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); |
| 224 | ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; |
| 225 | ctrl |= best_src << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; |
| 226 | writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); |
| 227 | } |
| 228 | |
Thomas Abraham | 6fe4717 | 2011-09-14 12:39:17 +0530 | [diff] [blame] | 229 | /* reprogram default hardware configuration */ |
| 230 | writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, |
| 231 | host->ioaddr + S3C64XX_SDHCI_CONTROL4); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 232 | |
Thomas Abraham | 6fe4717 | 2011-09-14 12:39:17 +0530 | [diff] [blame] | 233 | ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); |
| 234 | ctrl |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | |
| 235 | S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | |
| 236 | S3C_SDHCI_CTRL2_ENFBCLKRX | |
| 237 | S3C_SDHCI_CTRL2_DFCNT_NONE | |
| 238 | S3C_SDHCI_CTRL2_ENCLKOUTHOLD); |
| 239 | writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 240 | |
Thomas Abraham | 6fe4717 | 2011-09-14 12:39:17 +0530 | [diff] [blame] | 241 | /* reconfigure the controller for new clock rate */ |
| 242 | ctrl = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0); |
| 243 | if (clock < 25 * 1000000) |
| 244 | ctrl |= (S3C_SDHCI_CTRL3_FCSEL3 | S3C_SDHCI_CTRL3_FCSEL2); |
| 245 | writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL3); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 246 | } |
| 247 | |
Marek Szyprowski | ce5f036 | 2010-08-10 18:01:56 -0700 | [diff] [blame] | 248 | /** |
| 249 | * sdhci_s3c_get_min_clock - callback to get minimal supported clock value |
| 250 | * @host: The SDHCI host being queried |
| 251 | * |
| 252 | * To init mmc host properly a minimal clock value is needed. For high system |
| 253 | * bus clock's values the standard formula gives values out of allowed range. |
| 254 | * The clock still can be set to lower values, if clock source other then |
| 255 | * system bus is selected. |
| 256 | */ |
| 257 | static unsigned int sdhci_s3c_get_min_clock(struct sdhci_host *host) |
| 258 | { |
| 259 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 260 | unsigned int delta, min = UINT_MAX; |
| 261 | int src; |
| 262 | |
| 263 | for (src = 0; src < MAX_BUS_CLK; src++) { |
| 264 | delta = sdhci_s3c_consider_clock(ourhost, src, 0); |
| 265 | if (delta == UINT_MAX) |
| 266 | continue; |
| 267 | /* delta is a negative value in this case */ |
| 268 | if (-delta < min) |
| 269 | min = -delta; |
| 270 | } |
| 271 | return min; |
| 272 | } |
| 273 | |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 274 | /* sdhci_cmu_get_max_clk - callback to get maximum clock frequency.*/ |
| 275 | static unsigned int sdhci_cmu_get_max_clock(struct sdhci_host *host) |
| 276 | { |
| 277 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 278 | |
| 279 | return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], UINT_MAX); |
| 280 | } |
| 281 | |
| 282 | /* sdhci_cmu_get_min_clock - callback to get minimal supported clock value. */ |
| 283 | static unsigned int sdhci_cmu_get_min_clock(struct sdhci_host *host) |
| 284 | { |
| 285 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 286 | |
| 287 | /* |
| 288 | * initial clock can be in the frequency range of |
| 289 | * 100KHz-400KHz, so we set it as max value. |
| 290 | */ |
| 291 | return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], 400000); |
| 292 | } |
| 293 | |
| 294 | /* sdhci_cmu_set_clock - callback on clock change.*/ |
| 295 | static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock) |
| 296 | { |
| 297 | struct sdhci_s3c *ourhost = to_s3c(host); |
Jingoo Han | 2ad0b24 | 2012-08-29 14:35:06 +0900 | [diff] [blame] | 298 | struct device *dev = &ourhost->pdev->dev; |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 299 | unsigned long timeout; |
| 300 | u16 clk = 0; |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 301 | |
| 302 | /* don't bother if the clock is going off */ |
| 303 | if (clock == 0) |
| 304 | return; |
| 305 | |
| 306 | sdhci_s3c_set_clock(host, clock); |
| 307 | |
| 308 | clk_set_rate(ourhost->clk_bus[ourhost->cur_clk], clock); |
| 309 | |
| 310 | host->clock = clock; |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 311 | |
| 312 | clk = SDHCI_CLOCK_INT_EN; |
| 313 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); |
| 314 | |
| 315 | /* Wait max 20 ms */ |
| 316 | timeout = 20; |
| 317 | while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL)) |
| 318 | & SDHCI_CLOCK_INT_STABLE)) { |
| 319 | if (timeout == 0) { |
Jingoo Han | 2ad0b24 | 2012-08-29 14:35:06 +0900 | [diff] [blame] | 320 | dev_err(dev, "%s: Internal clock never stabilised.\n", |
| 321 | mmc_hostname(host->mmc)); |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 322 | return; |
| 323 | } |
| 324 | timeout--; |
| 325 | mdelay(1); |
| 326 | } |
| 327 | |
| 328 | clk |= SDHCI_CLOCK_CARD_EN; |
| 329 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 330 | } |
| 331 | |
Jaehoon Chung | 548f07d | 2011-01-12 11:59:12 +0900 | [diff] [blame] | 332 | /** |
| 333 | * sdhci_s3c_platform_8bit_width - support 8bit buswidth |
| 334 | * @host: The SDHCI host being queried |
| 335 | * @width: MMC_BUS_WIDTH_ macro for the bus width being requested |
| 336 | * |
| 337 | * We have 8-bit width support but is not a v3 controller. |
| 338 | * So we add platform_8bit_width() and support 8bit width. |
| 339 | */ |
| 340 | static int sdhci_s3c_platform_8bit_width(struct sdhci_host *host, int width) |
| 341 | { |
| 342 | u8 ctrl; |
| 343 | |
| 344 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); |
| 345 | |
| 346 | switch (width) { |
| 347 | case MMC_BUS_WIDTH_8: |
| 348 | ctrl |= SDHCI_CTRL_8BITBUS; |
| 349 | ctrl &= ~SDHCI_CTRL_4BITBUS; |
| 350 | break; |
| 351 | case MMC_BUS_WIDTH_4: |
| 352 | ctrl |= SDHCI_CTRL_4BITBUS; |
| 353 | ctrl &= ~SDHCI_CTRL_8BITBUS; |
| 354 | break; |
| 355 | default: |
Girish K S | 49bb1e6 | 2011-08-26 14:58:18 +0530 | [diff] [blame] | 356 | ctrl &= ~SDHCI_CTRL_4BITBUS; |
| 357 | ctrl &= ~SDHCI_CTRL_8BITBUS; |
Jaehoon Chung | 548f07d | 2011-01-12 11:59:12 +0900 | [diff] [blame] | 358 | break; |
| 359 | } |
| 360 | |
| 361 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); |
| 362 | |
| 363 | return 0; |
| 364 | } |
| 365 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 366 | static struct sdhci_ops sdhci_s3c_ops = { |
| 367 | .get_max_clock = sdhci_s3c_get_max_clk, |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 368 | .set_clock = sdhci_s3c_set_clock, |
Marek Szyprowski | ce5f036 | 2010-08-10 18:01:56 -0700 | [diff] [blame] | 369 | .get_min_clock = sdhci_s3c_get_min_clock, |
Jaehoon Chung | 548f07d | 2011-01-12 11:59:12 +0900 | [diff] [blame] | 370 | .platform_8bit_width = sdhci_s3c_platform_8bit_width, |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 371 | }; |
| 372 | |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 373 | static void sdhci_s3c_notify_change(struct platform_device *dev, int state) |
| 374 | { |
| 375 | struct sdhci_host *host = platform_get_drvdata(dev); |
Marek Szyprowski | 06fe577 | 2010-09-20 15:03:42 +0200 | [diff] [blame] | 376 | unsigned long flags; |
| 377 | |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 378 | if (host) { |
Marek Szyprowski | 06fe577 | 2010-09-20 15:03:42 +0200 | [diff] [blame] | 379 | spin_lock_irqsave(&host->lock, flags); |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 380 | if (state) { |
| 381 | dev_dbg(&dev->dev, "card inserted.\n"); |
| 382 | host->flags &= ~SDHCI_DEVICE_DEAD; |
| 383 | host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; |
| 384 | } else { |
| 385 | dev_dbg(&dev->dev, "card removed.\n"); |
| 386 | host->flags |= SDHCI_DEVICE_DEAD; |
| 387 | host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION; |
| 388 | } |
Kyungmin Park | f522886 | 2010-08-19 14:13:37 -0700 | [diff] [blame] | 389 | tasklet_schedule(&host->card_tasklet); |
Marek Szyprowski | 06fe577 | 2010-09-20 15:03:42 +0200 | [diff] [blame] | 390 | spin_unlock_irqrestore(&host->lock, flags); |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 391 | } |
| 392 | } |
| 393 | |
| 394 | static irqreturn_t sdhci_s3c_gpio_card_detect_thread(int irq, void *dev_id) |
| 395 | { |
| 396 | struct sdhci_s3c *sc = dev_id; |
| 397 | int status = gpio_get_value(sc->ext_cd_gpio); |
| 398 | if (sc->pdata->ext_cd_gpio_invert) |
| 399 | status = !status; |
| 400 | sdhci_s3c_notify_change(sc->pdev, status); |
| 401 | return IRQ_HANDLED; |
| 402 | } |
| 403 | |
| 404 | static void sdhci_s3c_setup_card_detect_gpio(struct sdhci_s3c *sc) |
| 405 | { |
| 406 | struct s3c_sdhci_platdata *pdata = sc->pdata; |
| 407 | struct device *dev = &sc->pdev->dev; |
| 408 | |
| 409 | if (gpio_request(pdata->ext_cd_gpio, "SDHCI EXT CD") == 0) { |
| 410 | sc->ext_cd_gpio = pdata->ext_cd_gpio; |
| 411 | sc->ext_cd_irq = gpio_to_irq(pdata->ext_cd_gpio); |
| 412 | if (sc->ext_cd_irq && |
| 413 | request_threaded_irq(sc->ext_cd_irq, NULL, |
| 414 | sdhci_s3c_gpio_card_detect_thread, |
Jingoo Han | 2ad0b24 | 2012-08-29 14:35:06 +0900 | [diff] [blame] | 415 | IRQF_TRIGGER_RISING | |
| 416 | IRQF_TRIGGER_FALLING | |
| 417 | IRQF_ONESHOT, |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 418 | dev_name(dev), sc) == 0) { |
| 419 | int status = gpio_get_value(sc->ext_cd_gpio); |
| 420 | if (pdata->ext_cd_gpio_invert) |
| 421 | status = !status; |
| 422 | sdhci_s3c_notify_change(sc->pdev, status); |
| 423 | } else { |
| 424 | dev_warn(dev, "cannot request irq for card detect\n"); |
| 425 | sc->ext_cd_irq = 0; |
| 426 | } |
| 427 | } else { |
| 428 | dev_err(dev, "cannot request gpio for card detect\n"); |
| 429 | } |
| 430 | } |
| 431 | |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 432 | #ifdef CONFIG_OF |
| 433 | static int __devinit sdhci_s3c_parse_dt(struct device *dev, |
| 434 | struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) |
| 435 | { |
| 436 | struct device_node *node = dev->of_node; |
| 437 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 438 | u32 max_width; |
| 439 | int gpio, cnt, ret; |
| 440 | |
| 441 | /* if the bus-width property is not specified, assume width as 1 */ |
| 442 | if (of_property_read_u32(node, "bus-width", &max_width)) |
| 443 | max_width = 1; |
| 444 | pdata->max_width = max_width; |
| 445 | |
| 446 | ourhost->gpios = devm_kzalloc(dev, NUM_GPIOS(pdata->max_width) * |
| 447 | sizeof(int), GFP_KERNEL); |
| 448 | if (!ourhost->gpios) |
| 449 | return -ENOMEM; |
| 450 | |
| 451 | /* get the card detection method */ |
| 452 | if (of_get_property(node, "broken-cd", 0)) { |
| 453 | pdata->cd_type = S3C_SDHCI_CD_NONE; |
| 454 | goto setup_bus; |
| 455 | } |
| 456 | |
| 457 | if (of_get_property(node, "non-removable", 0)) { |
| 458 | pdata->cd_type = S3C_SDHCI_CD_PERMANENT; |
| 459 | goto setup_bus; |
| 460 | } |
| 461 | |
| 462 | gpio = of_get_named_gpio(node, "cd-gpios", 0); |
| 463 | if (gpio_is_valid(gpio)) { |
| 464 | pdata->cd_type = S3C_SDHCI_CD_GPIO; |
| 465 | goto found_cd; |
| 466 | } else if (gpio != -ENOENT) { |
| 467 | dev_err(dev, "invalid card detect gpio specified\n"); |
| 468 | return -EINVAL; |
| 469 | } |
| 470 | |
| 471 | gpio = of_get_named_gpio(node, "samsung,cd-pinmux-gpio", 0); |
| 472 | if (gpio_is_valid(gpio)) { |
| 473 | pdata->cd_type = S3C_SDHCI_CD_INTERNAL; |
| 474 | goto found_cd; |
| 475 | } else if (gpio != -ENOENT) { |
| 476 | dev_err(dev, "invalid card detect gpio specified\n"); |
| 477 | return -EINVAL; |
| 478 | } |
| 479 | |
| 480 | dev_info(dev, "assuming no card detect line available\n"); |
| 481 | pdata->cd_type = S3C_SDHCI_CD_NONE; |
| 482 | |
| 483 | found_cd: |
| 484 | if (pdata->cd_type == S3C_SDHCI_CD_GPIO) { |
| 485 | pdata->ext_cd_gpio = gpio; |
| 486 | ourhost->ext_cd_gpio = -1; |
| 487 | if (of_get_property(node, "cd-inverted", NULL)) |
| 488 | pdata->ext_cd_gpio_invert = 1; |
| 489 | } else if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) { |
| 490 | ret = gpio_request(gpio, "sdhci-cd"); |
| 491 | if (ret) { |
| 492 | dev_err(dev, "card detect gpio request failed\n"); |
| 493 | return -EINVAL; |
| 494 | } |
| 495 | ourhost->ext_cd_gpio = gpio; |
| 496 | } |
| 497 | |
| 498 | setup_bus: |
| 499 | /* get the gpios for command, clock and data lines */ |
| 500 | for (cnt = 0; cnt < NUM_GPIOS(pdata->max_width); cnt++) { |
| 501 | gpio = of_get_gpio(node, cnt); |
| 502 | if (!gpio_is_valid(gpio)) { |
| 503 | dev_err(dev, "invalid gpio[%d]\n", cnt); |
| 504 | goto err_free_dt_cd_gpio; |
| 505 | } |
| 506 | ourhost->gpios[cnt] = gpio; |
| 507 | } |
| 508 | |
| 509 | for (cnt = 0; cnt < NUM_GPIOS(pdata->max_width); cnt++) { |
| 510 | ret = gpio_request(ourhost->gpios[cnt], "sdhci-gpio"); |
| 511 | if (ret) { |
| 512 | dev_err(dev, "gpio[%d] request failed\n", cnt); |
| 513 | goto err_free_dt_gpios; |
| 514 | } |
| 515 | } |
| 516 | |
| 517 | return 0; |
| 518 | |
| 519 | err_free_dt_gpios: |
| 520 | while (--cnt >= 0) |
| 521 | gpio_free(ourhost->gpios[cnt]); |
| 522 | err_free_dt_cd_gpio: |
| 523 | if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) |
| 524 | gpio_free(ourhost->ext_cd_gpio); |
| 525 | return -EINVAL; |
| 526 | } |
| 527 | #else |
| 528 | static int __devinit sdhci_s3c_parse_dt(struct device *dev, |
| 529 | struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) |
| 530 | { |
| 531 | return -EINVAL; |
| 532 | } |
| 533 | #endif |
| 534 | |
| 535 | static const struct of_device_id sdhci_s3c_dt_match[]; |
| 536 | |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 537 | static inline struct sdhci_s3c_drv_data *sdhci_s3c_get_driver_data( |
| 538 | struct platform_device *pdev) |
| 539 | { |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 540 | #ifdef CONFIG_OF |
| 541 | if (pdev->dev.of_node) { |
| 542 | const struct of_device_id *match; |
| 543 | match = of_match_node(sdhci_s3c_dt_match, pdev->dev.of_node); |
| 544 | return (struct sdhci_s3c_drv_data *)match->data; |
| 545 | } |
| 546 | #endif |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 547 | return (struct sdhci_s3c_drv_data *) |
| 548 | platform_get_device_id(pdev)->driver_data; |
| 549 | } |
| 550 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 551 | static int __devinit sdhci_s3c_probe(struct platform_device *pdev) |
| 552 | { |
Thomas Abraham | 1d4dc33 | 2012-02-16 22:23:59 +0900 | [diff] [blame] | 553 | struct s3c_sdhci_platdata *pdata; |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 554 | struct sdhci_s3c_drv_data *drv_data; |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 555 | struct device *dev = &pdev->dev; |
| 556 | struct sdhci_host *host; |
| 557 | struct sdhci_s3c *sc; |
| 558 | struct resource *res; |
| 559 | int ret, irq, ptr, clks; |
| 560 | |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 561 | if (!pdev->dev.platform_data && !pdev->dev.of_node) { |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 562 | dev_err(dev, "no device data specified\n"); |
| 563 | return -ENOENT; |
| 564 | } |
| 565 | |
| 566 | irq = platform_get_irq(pdev, 0); |
| 567 | if (irq < 0) { |
| 568 | dev_err(dev, "no irq specified\n"); |
| 569 | return irq; |
| 570 | } |
| 571 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 572 | host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c)); |
| 573 | if (IS_ERR(host)) { |
| 574 | dev_err(dev, "sdhci_alloc_host() failed\n"); |
| 575 | return PTR_ERR(host); |
| 576 | } |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 577 | sc = sdhci_priv(host); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 578 | |
Thomas Abraham | 1d4dc33 | 2012-02-16 22:23:59 +0900 | [diff] [blame] | 579 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); |
| 580 | if (!pdata) { |
| 581 | ret = -ENOMEM; |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 582 | goto err_pdata; |
Thomas Abraham | 1d4dc33 | 2012-02-16 22:23:59 +0900 | [diff] [blame] | 583 | } |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 584 | |
| 585 | if (pdev->dev.of_node) { |
| 586 | ret = sdhci_s3c_parse_dt(&pdev->dev, host, pdata); |
| 587 | if (ret) |
| 588 | goto err_pdata; |
| 589 | } else { |
| 590 | memcpy(pdata, pdev->dev.platform_data, sizeof(*pdata)); |
| 591 | sc->ext_cd_gpio = -1; /* invalid gpio number */ |
| 592 | } |
Thomas Abraham | 1d4dc33 | 2012-02-16 22:23:59 +0900 | [diff] [blame] | 593 | |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 594 | drv_data = sdhci_s3c_get_driver_data(pdev); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 595 | |
| 596 | sc->host = host; |
| 597 | sc->pdev = pdev; |
| 598 | sc->pdata = pdata; |
| 599 | |
| 600 | platform_set_drvdata(pdev, host); |
| 601 | |
| 602 | sc->clk_io = clk_get(dev, "hsmmc"); |
| 603 | if (IS_ERR(sc->clk_io)) { |
| 604 | dev_err(dev, "failed to get io clock\n"); |
| 605 | ret = PTR_ERR(sc->clk_io); |
| 606 | goto err_io_clk; |
| 607 | } |
| 608 | |
| 609 | /* enable the local io clock and keep it running for the moment. */ |
Thomas Abraham | 0f310a05 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 610 | clk_prepare_enable(sc->clk_io); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 611 | |
| 612 | for (clks = 0, ptr = 0; ptr < MAX_BUS_CLK; ptr++) { |
| 613 | struct clk *clk; |
Rajeshwari Shinde | 4346b6d | 2011-11-03 10:52:58 +0900 | [diff] [blame] | 614 | char name[14]; |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 615 | |
Rajeshwari Shinde | 4346b6d | 2011-11-03 10:52:58 +0900 | [diff] [blame] | 616 | snprintf(name, 14, "mmc_busclk.%d", ptr); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 617 | clk = clk_get(dev, name); |
Jingoo Han | 2ad0b24 | 2012-08-29 14:35:06 +0900 | [diff] [blame] | 618 | if (IS_ERR(clk)) |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 619 | continue; |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 620 | |
| 621 | clks++; |
| 622 | sc->clk_bus[ptr] = clk; |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 623 | |
| 624 | /* |
| 625 | * save current clock index to know which clock bus |
| 626 | * is used later in overriding functions. |
| 627 | */ |
| 628 | sc->cur_clk = ptr; |
| 629 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 630 | dev_info(dev, "clock source %d: %s (%ld Hz)\n", |
| 631 | ptr, name, clk_get_rate(clk)); |
| 632 | } |
| 633 | |
| 634 | if (clks == 0) { |
| 635 | dev_err(dev, "failed to find any bus clocks\n"); |
| 636 | ret = -ENOENT; |
| 637 | goto err_no_busclks; |
| 638 | } |
| 639 | |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 640 | #ifndef CONFIG_PM_RUNTIME |
Thomas Abraham | 0f310a05 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 641 | clk_prepare_enable(sc->clk_bus[sc->cur_clk]); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 642 | #endif |
Chander Kashyap | e684c46 | 2012-09-14 09:08:49 +0000 | [diff] [blame] | 643 | |
Julia Lawall | 9bda6da | 2012-03-08 23:24:53 -0500 | [diff] [blame] | 644 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 645 | host->ioaddr = devm_request_and_ioremap(&pdev->dev, res); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 646 | if (!host->ioaddr) { |
| 647 | dev_err(dev, "failed to map registers\n"); |
| 648 | ret = -ENXIO; |
| 649 | goto err_req_regs; |
| 650 | } |
| 651 | |
| 652 | /* Ensure we have minimal gpio selected CMD/CLK/Detect */ |
| 653 | if (pdata->cfg_gpio) |
| 654 | pdata->cfg_gpio(pdev, pdata->max_width); |
| 655 | |
| 656 | host->hw_name = "samsung-hsmmc"; |
| 657 | host->ops = &sdhci_s3c_ops; |
| 658 | host->quirks = 0; |
| 659 | host->irq = irq; |
| 660 | |
| 661 | /* Setup quirks for the controller */ |
Thomas Abraham | b2e75ef | 2010-05-26 14:42:05 -0700 | [diff] [blame] | 662 | host->quirks |= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC; |
Marek Szyprowski | a1d5646 | 2010-08-10 18:01:57 -0700 | [diff] [blame] | 663 | host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT; |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 664 | if (drv_data) |
| 665 | host->quirks |= drv_data->sdhci_quirks; |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 666 | |
| 667 | #ifndef CONFIG_MMC_SDHCI_S3C_DMA |
| 668 | |
| 669 | /* we currently see overruns on errors, so disable the SDMA |
| 670 | * support as well. */ |
| 671 | host->quirks |= SDHCI_QUIRK_BROKEN_DMA; |
| 672 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 673 | #endif /* CONFIG_MMC_SDHCI_S3C_DMA */ |
| 674 | |
| 675 | /* It seems we do not get an DATA transfer complete on non-busy |
| 676 | * transfers, not sure if this is a problem with this specific |
| 677 | * SDHCI block, or a missing configuration that needs to be set. */ |
| 678 | host->quirks |= SDHCI_QUIRK_NO_BUSY_IRQ; |
| 679 | |
Kyungmin Park | 732f0e3 | 2010-10-30 12:58:56 +0900 | [diff] [blame] | 680 | /* This host supports the Auto CMD12 */ |
| 681 | host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; |
| 682 | |
Jaehoon Chung | 7199e2b | 2011-07-12 17:30:47 +0900 | [diff] [blame] | 683 | /* Samsung SoCs need BROKEN_ADMA_ZEROLEN_DESC */ |
| 684 | host->quirks |= SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC; |
| 685 | |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 686 | if (pdata->cd_type == S3C_SDHCI_CD_NONE || |
| 687 | pdata->cd_type == S3C_SDHCI_CD_PERMANENT) |
| 688 | host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; |
| 689 | |
| 690 | if (pdata->cd_type == S3C_SDHCI_CD_PERMANENT) |
| 691 | host->mmc->caps = MMC_CAP_NONREMOVABLE; |
| 692 | |
Thomas Abraham | 0d22c77 | 2012-03-31 23:29:45 -0400 | [diff] [blame] | 693 | switch (pdata->max_width) { |
| 694 | case 8: |
| 695 | host->mmc->caps |= MMC_CAP_8_BIT_DATA; |
| 696 | case 4: |
| 697 | host->mmc->caps |= MMC_CAP_4_BIT_DATA; |
| 698 | break; |
| 699 | } |
| 700 | |
Sangwook Lee | fa1773c | 2011-11-07 17:05:22 +0000 | [diff] [blame] | 701 | if (pdata->pm_caps) |
| 702 | host->mmc->pm_caps |= pdata->pm_caps; |
| 703 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 704 | host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR | |
| 705 | SDHCI_QUIRK_32BIT_DMA_SIZE); |
| 706 | |
Hyuk Lee | 3fe42e0 | 2010-08-10 18:01:55 -0700 | [diff] [blame] | 707 | /* HSMMC on Samsung SoCs uses SDCLK as timeout clock */ |
| 708 | host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK; |
| 709 | |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 710 | /* |
| 711 | * If controller does not have internal clock divider, |
| 712 | * we can use overriding functions instead of default. |
| 713 | */ |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 714 | if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) { |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 715 | sdhci_s3c_ops.set_clock = sdhci_cmu_set_clock; |
| 716 | sdhci_s3c_ops.get_min_clock = sdhci_cmu_get_min_clock; |
| 717 | sdhci_s3c_ops.get_max_clock = sdhci_cmu_get_max_clock; |
| 718 | } |
| 719 | |
Jeongbae Seo | b3824f2 | 2010-10-08 17:46:20 +0900 | [diff] [blame] | 720 | /* It supports additional host capabilities if needed */ |
| 721 | if (pdata->host_caps) |
| 722 | host->mmc->caps |= pdata->host_caps; |
| 723 | |
Jaehoon Chung | c1c4b66 | 2012-02-07 15:59:01 +0900 | [diff] [blame] | 724 | if (pdata->host_caps2) |
| 725 | host->mmc->caps2 |= pdata->host_caps2; |
| 726 | |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 727 | pm_runtime_enable(&pdev->dev); |
| 728 | pm_runtime_set_autosuspend_delay(&pdev->dev, 50); |
| 729 | pm_runtime_use_autosuspend(&pdev->dev); |
| 730 | pm_suspend_ignore_children(&pdev->dev, 1); |
| 731 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 732 | ret = sdhci_add_host(host); |
| 733 | if (ret) { |
| 734 | dev_err(dev, "sdhci_add_host() failed\n"); |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 735 | pm_runtime_forbid(&pdev->dev); |
| 736 | pm_runtime_get_noresume(&pdev->dev); |
Julia Lawall | 9bda6da | 2012-03-08 23:24:53 -0500 | [diff] [blame] | 737 | goto err_req_regs; |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 738 | } |
| 739 | |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 740 | /* The following two methods of card detection might call |
| 741 | sdhci_s3c_notify_change() immediately, so they can be called |
| 742 | only after sdhci_add_host(). Setup errors are ignored. */ |
| 743 | if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_init) |
| 744 | pdata->ext_cd_init(&sdhci_s3c_notify_change); |
| 745 | if (pdata->cd_type == S3C_SDHCI_CD_GPIO && |
| 746 | gpio_is_valid(pdata->ext_cd_gpio)) |
| 747 | sdhci_s3c_setup_card_detect_gpio(sc); |
| 748 | |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 749 | #ifdef CONFIG_PM_RUNTIME |
Seungwon Jeon | 0aa55c2 | 2012-10-30 14:28:36 +0900 | [diff] [blame^] | 750 | if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL) |
| 751 | clk_disable_unprepare(sc->clk_io); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 752 | #endif |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 753 | return 0; |
| 754 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 755 | err_req_regs: |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 756 | #ifndef CONFIG_PM_RUNTIME |
Thomas Abraham | 0f310a05 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 757 | clk_disable_unprepare(sc->clk_bus[sc->cur_clk]); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 758 | #endif |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 759 | for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) { |
Jaehoon Chung | 326adda | 2011-10-12 13:14:29 +0900 | [diff] [blame] | 760 | if (sc->clk_bus[ptr]) { |
Jaehoon Chung | 326adda | 2011-10-12 13:14:29 +0900 | [diff] [blame] | 761 | clk_put(sc->clk_bus[ptr]); |
| 762 | } |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 763 | } |
| 764 | |
| 765 | err_no_busclks: |
Thomas Abraham | 0f310a05 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 766 | clk_disable_unprepare(sc->clk_io); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 767 | clk_put(sc->clk_io); |
| 768 | |
| 769 | err_io_clk: |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 770 | for (ptr = 0; ptr < NUM_GPIOS(sc->pdata->max_width); ptr++) |
| 771 | gpio_free(sc->gpios[ptr]); |
| 772 | if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) |
| 773 | gpio_free(sc->ext_cd_gpio); |
| 774 | |
| 775 | err_pdata: |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 776 | sdhci_free_host(host); |
| 777 | |
| 778 | return ret; |
| 779 | } |
| 780 | |
| 781 | static int __devexit sdhci_s3c_remove(struct platform_device *pdev) |
| 782 | { |
Marek Szyprowski | 9d51a6b | 2010-07-20 13:24:33 -0700 | [diff] [blame] | 783 | struct sdhci_host *host = platform_get_drvdata(pdev); |
| 784 | struct sdhci_s3c *sc = sdhci_priv(host); |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 785 | struct s3c_sdhci_platdata *pdata = sc->pdata; |
Marek Szyprowski | 9d51a6b | 2010-07-20 13:24:33 -0700 | [diff] [blame] | 786 | int ptr; |
| 787 | |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 788 | if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_cleanup) |
| 789 | pdata->ext_cd_cleanup(&sdhci_s3c_notify_change); |
| 790 | |
| 791 | if (sc->ext_cd_irq) |
| 792 | free_irq(sc->ext_cd_irq, sc); |
| 793 | |
| 794 | if (gpio_is_valid(sc->ext_cd_gpio)) |
| 795 | gpio_free(sc->ext_cd_gpio); |
| 796 | |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 797 | #ifdef CONFIG_PM_RUNTIME |
Seungwon Jeon | 0aa55c2 | 2012-10-30 14:28:36 +0900 | [diff] [blame^] | 798 | if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL) |
| 799 | clk_prepare_enable(sc->clk_io); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 800 | #endif |
Marek Szyprowski | 9d51a6b | 2010-07-20 13:24:33 -0700 | [diff] [blame] | 801 | sdhci_remove_host(host, 1); |
| 802 | |
Chander Kashyap | 387a8cbd | 2012-09-14 09:08:50 +0000 | [diff] [blame] | 803 | pm_runtime_dont_use_autosuspend(&pdev->dev); |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 804 | pm_runtime_disable(&pdev->dev); |
| 805 | |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 806 | #ifndef CONFIG_PM_RUNTIME |
Thomas Abraham | 0f310a05 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 807 | clk_disable_unprepare(sc->clk_bus[sc->cur_clk]); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 808 | #endif |
Jaehoon Chung | 5feb54a | 2012-09-19 14:43:33 +0800 | [diff] [blame] | 809 | for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) { |
Marek Szyprowski | 9320f7c | 2010-09-23 16:22:05 +0200 | [diff] [blame] | 810 | if (sc->clk_bus[ptr]) { |
Marek Szyprowski | 9320f7c | 2010-09-23 16:22:05 +0200 | [diff] [blame] | 811 | clk_put(sc->clk_bus[ptr]); |
| 812 | } |
Marek Szyprowski | 9d51a6b | 2010-07-20 13:24:33 -0700 | [diff] [blame] | 813 | } |
Thomas Abraham | 0f310a05 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 814 | clk_disable_unprepare(sc->clk_io); |
Marek Szyprowski | 9d51a6b | 2010-07-20 13:24:33 -0700 | [diff] [blame] | 815 | clk_put(sc->clk_io); |
| 816 | |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 817 | if (pdev->dev.of_node) { |
| 818 | for (ptr = 0; ptr < NUM_GPIOS(sc->pdata->max_width); ptr++) |
| 819 | gpio_free(sc->gpios[ptr]); |
| 820 | } |
| 821 | |
Marek Szyprowski | 9d51a6b | 2010-07-20 13:24:33 -0700 | [diff] [blame] | 822 | sdhci_free_host(host); |
| 823 | platform_set_drvdata(pdev, NULL); |
| 824 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 825 | return 0; |
| 826 | } |
| 827 | |
Mark Brown | d5e9c02 | 2012-03-03 00:46:41 +0000 | [diff] [blame] | 828 | #ifdef CONFIG_PM_SLEEP |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 829 | static int sdhci_s3c_suspend(struct device *dev) |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 830 | { |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 831 | struct sdhci_host *host = dev_get_drvdata(dev); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 832 | |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 833 | return sdhci_suspend_host(host); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 834 | } |
| 835 | |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 836 | static int sdhci_s3c_resume(struct device *dev) |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 837 | { |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 838 | struct sdhci_host *host = dev_get_drvdata(dev); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 839 | |
Wonil Choi | 65d1351 | 2011-06-29 11:38:38 +0900 | [diff] [blame] | 840 | return sdhci_resume_host(host); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 841 | } |
Mark Brown | d5e9c02 | 2012-03-03 00:46:41 +0000 | [diff] [blame] | 842 | #endif |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 843 | |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 844 | #ifdef CONFIG_PM_RUNTIME |
| 845 | static int sdhci_s3c_runtime_suspend(struct device *dev) |
| 846 | { |
| 847 | struct sdhci_host *host = dev_get_drvdata(dev); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 848 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 849 | struct clk *busclk = ourhost->clk_io; |
| 850 | int ret; |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 851 | |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 852 | ret = sdhci_runtime_suspend_host(host); |
| 853 | |
Thomas Abraham | 0f310a05 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 854 | clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]); |
| 855 | clk_disable_unprepare(busclk); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 856 | return ret; |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 857 | } |
| 858 | |
| 859 | static int sdhci_s3c_runtime_resume(struct device *dev) |
| 860 | { |
| 861 | struct sdhci_host *host = dev_get_drvdata(dev); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 862 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 863 | struct clk *busclk = ourhost->clk_io; |
| 864 | int ret; |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 865 | |
Thomas Abraham | 0f310a05 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 866 | clk_prepare_enable(busclk); |
| 867 | clk_prepare_enable(ourhost->clk_bus[ourhost->cur_clk]); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 868 | ret = sdhci_runtime_resume_host(host); |
| 869 | return ret; |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 870 | } |
| 871 | #endif |
| 872 | |
Mark Brown | d5e9c02 | 2012-03-03 00:46:41 +0000 | [diff] [blame] | 873 | #ifdef CONFIG_PM |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 874 | static const struct dev_pm_ops sdhci_s3c_pmops = { |
Mark Brown | d5e9c02 | 2012-03-03 00:46:41 +0000 | [diff] [blame] | 875 | SET_SYSTEM_SLEEP_PM_OPS(sdhci_s3c_suspend, sdhci_s3c_resume) |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 876 | SET_RUNTIME_PM_OPS(sdhci_s3c_runtime_suspend, sdhci_s3c_runtime_resume, |
| 877 | NULL) |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 878 | }; |
| 879 | |
| 880 | #define SDHCI_S3C_PMOPS (&sdhci_s3c_pmops) |
| 881 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 882 | #else |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 883 | #define SDHCI_S3C_PMOPS NULL |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 884 | #endif |
| 885 | |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 886 | #if defined(CONFIG_CPU_EXYNOS4210) || defined(CONFIG_SOC_EXYNOS4212) |
| 887 | static struct sdhci_s3c_drv_data exynos4_sdhci_drv_data = { |
| 888 | .sdhci_quirks = SDHCI_QUIRK_NONSTANDARD_CLOCK, |
| 889 | }; |
| 890 | #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)&exynos4_sdhci_drv_data) |
| 891 | #else |
| 892 | #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)NULL) |
| 893 | #endif |
| 894 | |
| 895 | static struct platform_device_id sdhci_s3c_driver_ids[] = { |
| 896 | { |
| 897 | .name = "s3c-sdhci", |
| 898 | .driver_data = (kernel_ulong_t)NULL, |
| 899 | }, { |
| 900 | .name = "exynos4-sdhci", |
| 901 | .driver_data = EXYNOS4_SDHCI_DRV_DATA, |
| 902 | }, |
| 903 | { } |
| 904 | }; |
| 905 | MODULE_DEVICE_TABLE(platform, sdhci_s3c_driver_ids); |
| 906 | |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 907 | #ifdef CONFIG_OF |
| 908 | static const struct of_device_id sdhci_s3c_dt_match[] = { |
| 909 | { .compatible = "samsung,s3c6410-sdhci", }, |
| 910 | { .compatible = "samsung,exynos4210-sdhci", |
| 911 | .data = (void *)EXYNOS4_SDHCI_DRV_DATA }, |
| 912 | {}, |
| 913 | }; |
| 914 | MODULE_DEVICE_TABLE(of, sdhci_s3c_dt_match); |
| 915 | #endif |
| 916 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 917 | static struct platform_driver sdhci_s3c_driver = { |
| 918 | .probe = sdhci_s3c_probe, |
| 919 | .remove = __devexit_p(sdhci_s3c_remove), |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 920 | .id_table = sdhci_s3c_driver_ids, |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 921 | .driver = { |
| 922 | .owner = THIS_MODULE, |
| 923 | .name = "s3c-sdhci", |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 924 | .of_match_table = of_match_ptr(sdhci_s3c_dt_match), |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 925 | .pm = SDHCI_S3C_PMOPS, |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 926 | }, |
| 927 | }; |
| 928 | |
Axel Lin | d1f81a6 | 2011-11-26 12:55:43 +0800 | [diff] [blame] | 929 | module_platform_driver(sdhci_s3c_driver); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 930 | |
| 931 | MODULE_DESCRIPTION("Samsung SDHCI (HSMMC) glue"); |
| 932 | MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); |
| 933 | MODULE_LICENSE("GPL v2"); |
| 934 | MODULE_ALIAS("platform:s3c-sdhci"); |