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> |
Arnd Bergmann | cc014f3 | 2013-03-04 18:28:21 +0100 | [diff] [blame] | 18 | #include <linux/platform_data/mmc-sdhci-s3c.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 19 | #include <linux/slab.h> |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 20 | #include <linux/clk.h> |
| 21 | #include <linux/io.h> |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 22 | #include <linux/gpio.h> |
Mark Brown | 55156d2 | 2011-07-29 15:35:00 +0100 | [diff] [blame] | 23 | #include <linux/module.h> |
Mark Brown | d5e9c02 | 2012-03-03 00:46:41 +0000 | [diff] [blame] | 24 | #include <linux/of.h> |
| 25 | #include <linux/of_gpio.h> |
| 26 | #include <linux/pm.h> |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 27 | #include <linux/pm_runtime.h> |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 28 | |
| 29 | #include <linux/mmc/host.h> |
| 30 | |
Arnd Bergmann | cc014f3 | 2013-03-04 18:28:21 +0100 | [diff] [blame] | 31 | #include "sdhci-s3c-regs.h" |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 32 | #include "sdhci.h" |
| 33 | |
| 34 | #define MAX_BUS_CLK (4) |
| 35 | |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 36 | /* Number of gpio's used is max data bus width + command and clock lines */ |
| 37 | #define NUM_GPIOS(x) (x + 2) |
| 38 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 39 | /** |
| 40 | * struct sdhci_s3c - S3C SDHCI instance |
| 41 | * @host: The SDHCI host created |
| 42 | * @pdev: The platform device we where created from. |
| 43 | * @ioarea: The resource created when we claimed the IO area. |
| 44 | * @pdata: The platform data for this controller. |
| 45 | * @cur_clk: The index of the current bus clock. |
| 46 | * @clk_io: The clock for the internal bus interface. |
| 47 | * @clk_bus: The clocks that are available for the SD/MMC bus clock. |
| 48 | */ |
| 49 | struct sdhci_s3c { |
| 50 | struct sdhci_host *host; |
| 51 | struct platform_device *pdev; |
| 52 | struct resource *ioarea; |
| 53 | struct s3c_sdhci_platdata *pdata; |
| 54 | unsigned int cur_clk; |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 55 | int ext_cd_irq; |
| 56 | int ext_cd_gpio; |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 57 | |
| 58 | struct clk *clk_io; |
| 59 | struct clk *clk_bus[MAX_BUS_CLK]; |
| 60 | }; |
| 61 | |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 62 | /** |
| 63 | * struct sdhci_s3c_driver_data - S3C SDHCI platform specific driver data |
| 64 | * @sdhci_quirks: sdhci host specific quirks. |
| 65 | * |
| 66 | * Specifies platform specific configuration of sdhci controller. |
| 67 | * Note: A structure for driver specific platform data is used for future |
| 68 | * expansion of its usage. |
| 69 | */ |
| 70 | struct sdhci_s3c_drv_data { |
| 71 | unsigned int sdhci_quirks; |
| 72 | }; |
| 73 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 74 | static inline struct sdhci_s3c *to_s3c(struct sdhci_host *host) |
| 75 | { |
| 76 | return sdhci_priv(host); |
| 77 | } |
| 78 | |
| 79 | /** |
| 80 | * get_curclk - convert ctrl2 register to clock source number |
| 81 | * @ctrl2: Control2 register value. |
| 82 | */ |
| 83 | static u32 get_curclk(u32 ctrl2) |
| 84 | { |
| 85 | ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; |
| 86 | ctrl2 >>= S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; |
| 87 | |
| 88 | return ctrl2; |
| 89 | } |
| 90 | |
| 91 | static void sdhci_s3c_check_sclk(struct sdhci_host *host) |
| 92 | { |
| 93 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 94 | u32 tmp = readl(host->ioaddr + S3C_SDHCI_CONTROL2); |
| 95 | |
| 96 | if (get_curclk(tmp) != ourhost->cur_clk) { |
| 97 | dev_dbg(&ourhost->pdev->dev, "restored ctrl2 clock setting\n"); |
| 98 | |
| 99 | tmp &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; |
| 100 | tmp |= ourhost->cur_clk << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; |
Jingoo Han | 7003fec | 2011-12-14 13:25:46 +0900 | [diff] [blame] | 101 | writel(tmp, host->ioaddr + S3C_SDHCI_CONTROL2); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 102 | } |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * sdhci_s3c_get_max_clk - callback to get maximum clock frequency. |
| 107 | * @host: The SDHCI host instance. |
| 108 | * |
| 109 | * Callback to return the maximum clock rate acheivable by the controller. |
| 110 | */ |
| 111 | static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host) |
| 112 | { |
| 113 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 114 | struct clk *busclk; |
| 115 | unsigned int rate, max; |
| 116 | int clk; |
| 117 | |
| 118 | /* note, a reset will reset the clock source */ |
| 119 | |
| 120 | sdhci_s3c_check_sclk(host); |
| 121 | |
| 122 | for (max = 0, clk = 0; clk < MAX_BUS_CLK; clk++) { |
| 123 | busclk = ourhost->clk_bus[clk]; |
| 124 | if (!busclk) |
| 125 | continue; |
| 126 | |
| 127 | rate = clk_get_rate(busclk); |
| 128 | if (rate > max) |
| 129 | max = rate; |
| 130 | } |
| 131 | |
| 132 | return max; |
| 133 | } |
| 134 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 135 | /** |
| 136 | * sdhci_s3c_consider_clock - consider one the bus clocks for current setting |
| 137 | * @ourhost: Our SDHCI instance. |
| 138 | * @src: The source clock index. |
| 139 | * @wanted: The clock frequency wanted. |
| 140 | */ |
| 141 | static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost, |
| 142 | unsigned int src, |
| 143 | unsigned int wanted) |
| 144 | { |
| 145 | unsigned long rate; |
| 146 | struct clk *clksrc = ourhost->clk_bus[src]; |
| 147 | int div; |
| 148 | |
| 149 | if (!clksrc) |
| 150 | return UINT_MAX; |
| 151 | |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 152 | /* |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 153 | * If controller uses a non-standard clock division, find the best clock |
| 154 | * speed possible with selected clock source and skip the division. |
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 (ourhost->host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) { |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 157 | rate = clk_round_rate(clksrc, wanted); |
| 158 | return wanted - rate; |
| 159 | } |
| 160 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 161 | rate = clk_get_rate(clksrc); |
| 162 | |
| 163 | for (div = 1; div < 256; div *= 2) { |
| 164 | if ((rate / div) <= wanted) |
| 165 | break; |
| 166 | } |
| 167 | |
| 168 | dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n", |
| 169 | src, rate, wanted, rate / div); |
| 170 | |
Jingoo Han | 2ad0b24 | 2012-08-29 14:35:06 +0900 | [diff] [blame] | 171 | return wanted - (rate / div); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 172 | } |
| 173 | |
| 174 | /** |
| 175 | * sdhci_s3c_set_clock - callback on clock change |
| 176 | * @host: The SDHCI host being changed |
| 177 | * @clock: The clock rate being requested. |
| 178 | * |
| 179 | * When the card's clock is going to be changed, look at the new frequency |
| 180 | * and find the best clock source to go with it. |
| 181 | */ |
| 182 | static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock) |
| 183 | { |
| 184 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 185 | unsigned int best = UINT_MAX; |
| 186 | unsigned int delta; |
| 187 | int best_src = 0; |
| 188 | int src; |
| 189 | u32 ctrl; |
| 190 | |
| 191 | /* don't bother if the clock is going off. */ |
| 192 | if (clock == 0) |
| 193 | return; |
| 194 | |
| 195 | for (src = 0; src < MAX_BUS_CLK; src++) { |
| 196 | delta = sdhci_s3c_consider_clock(ourhost, src, clock); |
| 197 | if (delta < best) { |
| 198 | best = delta; |
| 199 | best_src = src; |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | dev_dbg(&ourhost->pdev->dev, |
| 204 | "selected source %d, clock %d, delta %d\n", |
| 205 | best_src, clock, best); |
| 206 | |
| 207 | /* select the new clock source */ |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 208 | if (ourhost->cur_clk != best_src) { |
| 209 | struct clk *clk = ourhost->clk_bus[best_src]; |
| 210 | |
Thomas Abraham | 0f310a0 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 211 | clk_prepare_enable(clk); |
| 212 | clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]); |
Chander Kashyap | e684c46 | 2012-09-14 09:08:49 +0000 | [diff] [blame] | 213 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 214 | /* turn clock off to card before changing clock source */ |
| 215 | writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL); |
| 216 | |
| 217 | ourhost->cur_clk = best_src; |
| 218 | host->max_clk = clk_get_rate(clk); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 219 | |
| 220 | ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); |
| 221 | ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; |
| 222 | ctrl |= best_src << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; |
| 223 | writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); |
| 224 | } |
| 225 | |
Thomas Abraham | 6fe4717 | 2011-09-14 12:39:17 +0530 | [diff] [blame] | 226 | /* reprogram default hardware configuration */ |
| 227 | writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, |
| 228 | host->ioaddr + S3C64XX_SDHCI_CONTROL4); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 229 | |
Thomas Abraham | 6fe4717 | 2011-09-14 12:39:17 +0530 | [diff] [blame] | 230 | ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); |
| 231 | ctrl |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | |
| 232 | S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | |
| 233 | S3C_SDHCI_CTRL2_ENFBCLKRX | |
| 234 | S3C_SDHCI_CTRL2_DFCNT_NONE | |
| 235 | S3C_SDHCI_CTRL2_ENCLKOUTHOLD); |
| 236 | writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 237 | |
Thomas Abraham | 6fe4717 | 2011-09-14 12:39:17 +0530 | [diff] [blame] | 238 | /* reconfigure the controller for new clock rate */ |
| 239 | ctrl = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0); |
| 240 | if (clock < 25 * 1000000) |
| 241 | ctrl |= (S3C_SDHCI_CTRL3_FCSEL3 | S3C_SDHCI_CTRL3_FCSEL2); |
| 242 | writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL3); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 243 | } |
| 244 | |
Marek Szyprowski | ce5f036 | 2010-08-10 18:01:56 -0700 | [diff] [blame] | 245 | /** |
| 246 | * sdhci_s3c_get_min_clock - callback to get minimal supported clock value |
| 247 | * @host: The SDHCI host being queried |
| 248 | * |
| 249 | * To init mmc host properly a minimal clock value is needed. For high system |
| 250 | * bus clock's values the standard formula gives values out of allowed range. |
| 251 | * The clock still can be set to lower values, if clock source other then |
| 252 | * system bus is selected. |
| 253 | */ |
| 254 | static unsigned int sdhci_s3c_get_min_clock(struct sdhci_host *host) |
| 255 | { |
| 256 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 257 | unsigned int delta, min = UINT_MAX; |
| 258 | int src; |
| 259 | |
| 260 | for (src = 0; src < MAX_BUS_CLK; src++) { |
| 261 | delta = sdhci_s3c_consider_clock(ourhost, src, 0); |
| 262 | if (delta == UINT_MAX) |
| 263 | continue; |
| 264 | /* delta is a negative value in this case */ |
| 265 | if (-delta < min) |
| 266 | min = -delta; |
| 267 | } |
| 268 | return min; |
| 269 | } |
| 270 | |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 271 | /* sdhci_cmu_get_max_clk - callback to get maximum clock frequency.*/ |
| 272 | static unsigned int sdhci_cmu_get_max_clock(struct sdhci_host *host) |
| 273 | { |
| 274 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 275 | |
| 276 | return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], UINT_MAX); |
| 277 | } |
| 278 | |
| 279 | /* sdhci_cmu_get_min_clock - callback to get minimal supported clock value. */ |
| 280 | static unsigned int sdhci_cmu_get_min_clock(struct sdhci_host *host) |
| 281 | { |
| 282 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 283 | |
| 284 | /* |
| 285 | * initial clock can be in the frequency range of |
| 286 | * 100KHz-400KHz, so we set it as max value. |
| 287 | */ |
| 288 | return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], 400000); |
| 289 | } |
| 290 | |
| 291 | /* sdhci_cmu_set_clock - callback on clock change.*/ |
| 292 | static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock) |
| 293 | { |
| 294 | struct sdhci_s3c *ourhost = to_s3c(host); |
Jingoo Han | 2ad0b24 | 2012-08-29 14:35:06 +0900 | [diff] [blame] | 295 | struct device *dev = &ourhost->pdev->dev; |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 296 | unsigned long timeout; |
| 297 | u16 clk = 0; |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 298 | |
Jaehoon Chung | 7ef2a5e | 2013-08-02 23:08:58 +0900 | [diff] [blame] | 299 | /* If the clock is going off, set to 0 at clock control register */ |
| 300 | if (clock == 0) { |
| 301 | sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL); |
| 302 | host->clock = clock; |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 303 | return; |
Jaehoon Chung | 7ef2a5e | 2013-08-02 23:08:58 +0900 | [diff] [blame] | 304 | } |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 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 | /** |
Sascha Hauer | 7bc088d | 2013-01-21 19:02:27 +0800 | [diff] [blame] | 333 | * sdhci_s3c_platform_bus_width - support 8bit buswidth |
Jaehoon Chung | 548f07d | 2011-01-12 11:59:12 +0900 | [diff] [blame] | 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. |
Sascha Hauer | 7bc088d | 2013-01-21 19:02:27 +0800 | [diff] [blame] | 338 | * So we add platform_bus_width() and support 8bit width. |
Jaehoon Chung | 548f07d | 2011-01-12 11:59:12 +0900 | [diff] [blame] | 339 | */ |
Sascha Hauer | 7bc088d | 2013-01-21 19:02:27 +0800 | [diff] [blame] | 340 | static int sdhci_s3c_platform_bus_width(struct sdhci_host *host, int width) |
Jaehoon Chung | 548f07d | 2011-01-12 11:59:12 +0900 | [diff] [blame] | 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, |
Sascha Hauer | 7bc088d | 2013-01-21 19:02:27 +0800 | [diff] [blame] | 370 | .platform_bus_width = sdhci_s3c_platform_bus_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); |
Sachin Kamat | 4577f77 | 2012-12-04 17:03:07 +0530 | [diff] [blame] | 376 | #ifdef CONFIG_PM_RUNTIME |
Heiko Stübner | fe007c0 | 2012-11-18 19:50:05 +0100 | [diff] [blame] | 377 | struct sdhci_s3c *sc = sdhci_priv(host); |
Sachin Kamat | 4577f77 | 2012-12-04 17:03:07 +0530 | [diff] [blame] | 378 | #endif |
Marek Szyprowski | 06fe577 | 2010-09-20 15:03:42 +0200 | [diff] [blame] | 379 | unsigned long flags; |
| 380 | |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 381 | if (host) { |
Marek Szyprowski | 06fe577 | 2010-09-20 15:03:42 +0200 | [diff] [blame] | 382 | spin_lock_irqsave(&host->lock, flags); |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 383 | if (state) { |
| 384 | dev_dbg(&dev->dev, "card inserted.\n"); |
Heiko Stübner | fe007c0 | 2012-11-18 19:50:05 +0100 | [diff] [blame] | 385 | #ifdef CONFIG_PM_RUNTIME |
| 386 | clk_prepare_enable(sc->clk_io); |
| 387 | #endif |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 388 | host->flags &= ~SDHCI_DEVICE_DEAD; |
| 389 | host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; |
| 390 | } else { |
| 391 | dev_dbg(&dev->dev, "card removed.\n"); |
| 392 | host->flags |= SDHCI_DEVICE_DEAD; |
| 393 | host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION; |
Heiko Stübner | fe007c0 | 2012-11-18 19:50:05 +0100 | [diff] [blame] | 394 | #ifdef CONFIG_PM_RUNTIME |
| 395 | clk_disable_unprepare(sc->clk_io); |
| 396 | #endif |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 397 | } |
Kyungmin Park | f522886 | 2010-08-19 14:13:37 -0700 | [diff] [blame] | 398 | tasklet_schedule(&host->card_tasklet); |
Marek Szyprowski | 06fe577 | 2010-09-20 15:03:42 +0200 | [diff] [blame] | 399 | spin_unlock_irqrestore(&host->lock, flags); |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 400 | } |
| 401 | } |
| 402 | |
| 403 | static irqreturn_t sdhci_s3c_gpio_card_detect_thread(int irq, void *dev_id) |
| 404 | { |
| 405 | struct sdhci_s3c *sc = dev_id; |
| 406 | int status = gpio_get_value(sc->ext_cd_gpio); |
| 407 | if (sc->pdata->ext_cd_gpio_invert) |
| 408 | status = !status; |
| 409 | sdhci_s3c_notify_change(sc->pdev, status); |
| 410 | return IRQ_HANDLED; |
| 411 | } |
| 412 | |
| 413 | static void sdhci_s3c_setup_card_detect_gpio(struct sdhci_s3c *sc) |
| 414 | { |
| 415 | struct s3c_sdhci_platdata *pdata = sc->pdata; |
| 416 | struct device *dev = &sc->pdev->dev; |
| 417 | |
Tomasz Figa | b1b8fea | 2012-11-25 15:40:44 -0500 | [diff] [blame] | 418 | if (devm_gpio_request(dev, pdata->ext_cd_gpio, "SDHCI EXT CD") == 0) { |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 419 | sc->ext_cd_gpio = pdata->ext_cd_gpio; |
| 420 | sc->ext_cd_irq = gpio_to_irq(pdata->ext_cd_gpio); |
| 421 | if (sc->ext_cd_irq && |
| 422 | request_threaded_irq(sc->ext_cd_irq, NULL, |
| 423 | sdhci_s3c_gpio_card_detect_thread, |
Jingoo Han | 2ad0b24 | 2012-08-29 14:35:06 +0900 | [diff] [blame] | 424 | IRQF_TRIGGER_RISING | |
| 425 | IRQF_TRIGGER_FALLING | |
| 426 | IRQF_ONESHOT, |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 427 | dev_name(dev), sc) == 0) { |
| 428 | int status = gpio_get_value(sc->ext_cd_gpio); |
| 429 | if (pdata->ext_cd_gpio_invert) |
| 430 | status = !status; |
| 431 | sdhci_s3c_notify_change(sc->pdev, status); |
| 432 | } else { |
| 433 | dev_warn(dev, "cannot request irq for card detect\n"); |
| 434 | sc->ext_cd_irq = 0; |
| 435 | } |
| 436 | } else { |
| 437 | dev_err(dev, "cannot request gpio for card detect\n"); |
| 438 | } |
| 439 | } |
| 440 | |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 441 | #ifdef CONFIG_OF |
Bill Pemberton | c3be1ef | 2012-11-19 13:23:06 -0500 | [diff] [blame] | 442 | static int sdhci_s3c_parse_dt(struct device *dev, |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 443 | struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) |
| 444 | { |
| 445 | struct device_node *node = dev->of_node; |
| 446 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 447 | u32 max_width; |
Thomas Abraham | e19499a | 2013-03-06 17:06:16 +0530 | [diff] [blame] | 448 | int gpio; |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 449 | |
| 450 | /* if the bus-width property is not specified, assume width as 1 */ |
| 451 | if (of_property_read_u32(node, "bus-width", &max_width)) |
| 452 | max_width = 1; |
| 453 | pdata->max_width = max_width; |
| 454 | |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 455 | /* get the card detection method */ |
Tushar Behera | ab5023e | 2012-11-20 09:41:53 +0530 | [diff] [blame] | 456 | if (of_get_property(node, "broken-cd", NULL)) { |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 457 | pdata->cd_type = S3C_SDHCI_CD_NONE; |
Thomas Abraham | e19499a | 2013-03-06 17:06:16 +0530 | [diff] [blame] | 458 | return 0; |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 459 | } |
| 460 | |
Tushar Behera | ab5023e | 2012-11-20 09:41:53 +0530 | [diff] [blame] | 461 | if (of_get_property(node, "non-removable", NULL)) { |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 462 | pdata->cd_type = S3C_SDHCI_CD_PERMANENT; |
Thomas Abraham | e19499a | 2013-03-06 17:06:16 +0530 | [diff] [blame] | 463 | return 0; |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | gpio = of_get_named_gpio(node, "cd-gpios", 0); |
| 467 | if (gpio_is_valid(gpio)) { |
| 468 | pdata->cd_type = S3C_SDHCI_CD_GPIO; |
Thomas Abraham | e19499a | 2013-03-06 17:06:16 +0530 | [diff] [blame] | 469 | pdata->ext_cd_gpio = gpio; |
| 470 | ourhost->ext_cd_gpio = -1; |
| 471 | if (of_get_property(node, "cd-inverted", NULL)) |
| 472 | pdata->ext_cd_gpio_invert = 1; |
| 473 | return 0; |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 474 | } else if (gpio != -ENOENT) { |
| 475 | dev_err(dev, "invalid card detect gpio specified\n"); |
| 476 | return -EINVAL; |
| 477 | } |
| 478 | |
Tomasz Figa | b96efcc | 2012-11-16 15:28:17 +0100 | [diff] [blame] | 479 | /* assuming internal card detect that will be configured by pinctrl */ |
| 480 | pdata->cd_type = S3C_SDHCI_CD_INTERNAL; |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 481 | return 0; |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 482 | } |
| 483 | #else |
Bill Pemberton | c3be1ef | 2012-11-19 13:23:06 -0500 | [diff] [blame] | 484 | static int sdhci_s3c_parse_dt(struct device *dev, |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 485 | struct sdhci_host *host, struct s3c_sdhci_platdata *pdata) |
| 486 | { |
| 487 | return -EINVAL; |
| 488 | } |
| 489 | #endif |
| 490 | |
| 491 | static const struct of_device_id sdhci_s3c_dt_match[]; |
| 492 | |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 493 | static inline struct sdhci_s3c_drv_data *sdhci_s3c_get_driver_data( |
| 494 | struct platform_device *pdev) |
| 495 | { |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 496 | #ifdef CONFIG_OF |
| 497 | if (pdev->dev.of_node) { |
| 498 | const struct of_device_id *match; |
| 499 | match = of_match_node(sdhci_s3c_dt_match, pdev->dev.of_node); |
| 500 | return (struct sdhci_s3c_drv_data *)match->data; |
| 501 | } |
| 502 | #endif |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 503 | return (struct sdhci_s3c_drv_data *) |
| 504 | platform_get_device_id(pdev)->driver_data; |
| 505 | } |
| 506 | |
Bill Pemberton | c3be1ef | 2012-11-19 13:23:06 -0500 | [diff] [blame] | 507 | static int sdhci_s3c_probe(struct platform_device *pdev) |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 508 | { |
Thomas Abraham | 1d4dc33 | 2012-02-16 22:23:59 +0900 | [diff] [blame] | 509 | struct s3c_sdhci_platdata *pdata; |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 510 | struct sdhci_s3c_drv_data *drv_data; |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 511 | struct device *dev = &pdev->dev; |
| 512 | struct sdhci_host *host; |
| 513 | struct sdhci_s3c *sc; |
| 514 | struct resource *res; |
| 515 | int ret, irq, ptr, clks; |
| 516 | |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 517 | if (!pdev->dev.platform_data && !pdev->dev.of_node) { |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 518 | dev_err(dev, "no device data specified\n"); |
| 519 | return -ENOENT; |
| 520 | } |
| 521 | |
| 522 | irq = platform_get_irq(pdev, 0); |
| 523 | if (irq < 0) { |
| 524 | dev_err(dev, "no irq specified\n"); |
| 525 | return irq; |
| 526 | } |
| 527 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 528 | host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c)); |
| 529 | if (IS_ERR(host)) { |
| 530 | dev_err(dev, "sdhci_alloc_host() failed\n"); |
| 531 | return PTR_ERR(host); |
| 532 | } |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 533 | sc = sdhci_priv(host); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 534 | |
Thomas Abraham | 1d4dc33 | 2012-02-16 22:23:59 +0900 | [diff] [blame] | 535 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); |
| 536 | if (!pdata) { |
| 537 | ret = -ENOMEM; |
Tomasz Figa | b1b8fea | 2012-11-25 15:40:44 -0500 | [diff] [blame] | 538 | goto err_pdata_io_clk; |
Thomas Abraham | 1d4dc33 | 2012-02-16 22:23:59 +0900 | [diff] [blame] | 539 | } |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 540 | |
| 541 | if (pdev->dev.of_node) { |
| 542 | ret = sdhci_s3c_parse_dt(&pdev->dev, host, pdata); |
| 543 | if (ret) |
Tomasz Figa | b1b8fea | 2012-11-25 15:40:44 -0500 | [diff] [blame] | 544 | goto err_pdata_io_clk; |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 545 | } else { |
| 546 | memcpy(pdata, pdev->dev.platform_data, sizeof(*pdata)); |
| 547 | sc->ext_cd_gpio = -1; /* invalid gpio number */ |
| 548 | } |
Thomas Abraham | 1d4dc33 | 2012-02-16 22:23:59 +0900 | [diff] [blame] | 549 | |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 550 | drv_data = sdhci_s3c_get_driver_data(pdev); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 551 | |
| 552 | sc->host = host; |
| 553 | sc->pdev = pdev; |
| 554 | sc->pdata = pdata; |
| 555 | |
| 556 | platform_set_drvdata(pdev, host); |
| 557 | |
Jingoo Han | 3aaf7ba | 2013-02-12 12:24:39 +0900 | [diff] [blame] | 558 | sc->clk_io = devm_clk_get(dev, "hsmmc"); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 559 | if (IS_ERR(sc->clk_io)) { |
| 560 | dev_err(dev, "failed to get io clock\n"); |
| 561 | ret = PTR_ERR(sc->clk_io); |
Tomasz Figa | b1b8fea | 2012-11-25 15:40:44 -0500 | [diff] [blame] | 562 | goto err_pdata_io_clk; |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 563 | } |
| 564 | |
| 565 | /* enable the local io clock and keep it running for the moment. */ |
Thomas Abraham | 0f310a0 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 566 | clk_prepare_enable(sc->clk_io); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 567 | |
| 568 | for (clks = 0, ptr = 0; ptr < MAX_BUS_CLK; ptr++) { |
| 569 | struct clk *clk; |
Rajeshwari Shinde | 4346b6d | 2011-11-03 10:52:58 +0900 | [diff] [blame] | 570 | char name[14]; |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 571 | |
Rajeshwari Shinde | 4346b6d | 2011-11-03 10:52:58 +0900 | [diff] [blame] | 572 | snprintf(name, 14, "mmc_busclk.%d", ptr); |
Jingoo Han | 3aaf7ba | 2013-02-12 12:24:39 +0900 | [diff] [blame] | 573 | clk = devm_clk_get(dev, name); |
Jingoo Han | 2ad0b24 | 2012-08-29 14:35:06 +0900 | [diff] [blame] | 574 | if (IS_ERR(clk)) |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 575 | continue; |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 576 | |
| 577 | clks++; |
| 578 | sc->clk_bus[ptr] = clk; |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 579 | |
| 580 | /* |
| 581 | * save current clock index to know which clock bus |
| 582 | * is used later in overriding functions. |
| 583 | */ |
| 584 | sc->cur_clk = ptr; |
| 585 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 586 | dev_info(dev, "clock source %d: %s (%ld Hz)\n", |
| 587 | ptr, name, clk_get_rate(clk)); |
| 588 | } |
| 589 | |
| 590 | if (clks == 0) { |
| 591 | dev_err(dev, "failed to find any bus clocks\n"); |
| 592 | ret = -ENOENT; |
| 593 | goto err_no_busclks; |
| 594 | } |
| 595 | |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 596 | #ifndef CONFIG_PM_RUNTIME |
Thomas Abraham | 0f310a0 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 597 | clk_prepare_enable(sc->clk_bus[sc->cur_clk]); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 598 | #endif |
Chander Kashyap | e684c46 | 2012-09-14 09:08:49 +0000 | [diff] [blame] | 599 | |
Julia Lawall | 9bda6da | 2012-03-08 23:24:53 -0500 | [diff] [blame] | 600 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Thierry Reding | a3e2cd7 | 2013-01-21 11:09:11 +0100 | [diff] [blame] | 601 | host->ioaddr = devm_ioremap_resource(&pdev->dev, res); |
| 602 | if (IS_ERR(host->ioaddr)) { |
| 603 | ret = PTR_ERR(host->ioaddr); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 604 | goto err_req_regs; |
| 605 | } |
| 606 | |
| 607 | /* Ensure we have minimal gpio selected CMD/CLK/Detect */ |
| 608 | if (pdata->cfg_gpio) |
| 609 | pdata->cfg_gpio(pdev, pdata->max_width); |
| 610 | |
| 611 | host->hw_name = "samsung-hsmmc"; |
| 612 | host->ops = &sdhci_s3c_ops; |
| 613 | host->quirks = 0; |
Jaehoon Chung | 285e244 | 2013-08-02 23:09:00 +0900 | [diff] [blame] | 614 | host->quirks2 = 0; |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 615 | host->irq = irq; |
| 616 | |
| 617 | /* Setup quirks for the controller */ |
Thomas Abraham | b2e75ef | 2010-05-26 14:42:05 -0700 | [diff] [blame] | 618 | host->quirks |= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC; |
Marek Szyprowski | a1d5646 | 2010-08-10 18:01:57 -0700 | [diff] [blame] | 619 | host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT; |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 620 | if (drv_data) |
| 621 | host->quirks |= drv_data->sdhci_quirks; |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 622 | |
| 623 | #ifndef CONFIG_MMC_SDHCI_S3C_DMA |
| 624 | |
| 625 | /* we currently see overruns on errors, so disable the SDMA |
| 626 | * support as well. */ |
| 627 | host->quirks |= SDHCI_QUIRK_BROKEN_DMA; |
| 628 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 629 | #endif /* CONFIG_MMC_SDHCI_S3C_DMA */ |
| 630 | |
| 631 | /* It seems we do not get an DATA transfer complete on non-busy |
| 632 | * transfers, not sure if this is a problem with this specific |
| 633 | * SDHCI block, or a missing configuration that needs to be set. */ |
| 634 | host->quirks |= SDHCI_QUIRK_NO_BUSY_IRQ; |
| 635 | |
Kyungmin Park | 732f0e3 | 2010-10-30 12:58:56 +0900 | [diff] [blame] | 636 | /* This host supports the Auto CMD12 */ |
| 637 | host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; |
| 638 | |
Jaehoon Chung | 7199e2b | 2011-07-12 17:30:47 +0900 | [diff] [blame] | 639 | /* Samsung SoCs need BROKEN_ADMA_ZEROLEN_DESC */ |
| 640 | host->quirks |= SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC; |
| 641 | |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 642 | if (pdata->cd_type == S3C_SDHCI_CD_NONE || |
| 643 | pdata->cd_type == S3C_SDHCI_CD_PERMANENT) |
| 644 | host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; |
| 645 | |
| 646 | if (pdata->cd_type == S3C_SDHCI_CD_PERMANENT) |
| 647 | host->mmc->caps = MMC_CAP_NONREMOVABLE; |
| 648 | |
Thomas Abraham | 0d22c77 | 2012-03-31 23:29:45 -0400 | [diff] [blame] | 649 | switch (pdata->max_width) { |
| 650 | case 8: |
| 651 | host->mmc->caps |= MMC_CAP_8_BIT_DATA; |
| 652 | case 4: |
| 653 | host->mmc->caps |= MMC_CAP_4_BIT_DATA; |
| 654 | break; |
| 655 | } |
| 656 | |
Sangwook Lee | fa1773c | 2011-11-07 17:05:22 +0000 | [diff] [blame] | 657 | if (pdata->pm_caps) |
| 658 | host->mmc->pm_caps |= pdata->pm_caps; |
| 659 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 660 | host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR | |
| 661 | SDHCI_QUIRK_32BIT_DMA_SIZE); |
| 662 | |
Hyuk Lee | 3fe42e0 | 2010-08-10 18:01:55 -0700 | [diff] [blame] | 663 | /* HSMMC on Samsung SoCs uses SDCLK as timeout clock */ |
| 664 | host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK; |
| 665 | |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 666 | /* |
| 667 | * If controller does not have internal clock divider, |
| 668 | * we can use overriding functions instead of default. |
| 669 | */ |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 670 | if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) { |
Jeongbae Seo | 253e0a7 | 2010-10-08 17:46:21 +0900 | [diff] [blame] | 671 | sdhci_s3c_ops.set_clock = sdhci_cmu_set_clock; |
| 672 | sdhci_s3c_ops.get_min_clock = sdhci_cmu_get_min_clock; |
| 673 | sdhci_s3c_ops.get_max_clock = sdhci_cmu_get_max_clock; |
| 674 | } |
| 675 | |
Jeongbae Seo | b3824f2 | 2010-10-08 17:46:20 +0900 | [diff] [blame] | 676 | /* It supports additional host capabilities if needed */ |
| 677 | if (pdata->host_caps) |
| 678 | host->mmc->caps |= pdata->host_caps; |
| 679 | |
Jaehoon Chung | c1c4b66 | 2012-02-07 15:59:01 +0900 | [diff] [blame] | 680 | if (pdata->host_caps2) |
| 681 | host->mmc->caps2 |= pdata->host_caps2; |
| 682 | |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 683 | pm_runtime_enable(&pdev->dev); |
| 684 | pm_runtime_set_autosuspend_delay(&pdev->dev, 50); |
| 685 | pm_runtime_use_autosuspend(&pdev->dev); |
| 686 | pm_suspend_ignore_children(&pdev->dev, 1); |
| 687 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 688 | ret = sdhci_add_host(host); |
| 689 | if (ret) { |
| 690 | dev_err(dev, "sdhci_add_host() failed\n"); |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 691 | pm_runtime_forbid(&pdev->dev); |
| 692 | pm_runtime_get_noresume(&pdev->dev); |
Julia Lawall | 9bda6da | 2012-03-08 23:24:53 -0500 | [diff] [blame] | 693 | goto err_req_regs; |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 694 | } |
| 695 | |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 696 | /* The following two methods of card detection might call |
| 697 | sdhci_s3c_notify_change() immediately, so they can be called |
| 698 | only after sdhci_add_host(). Setup errors are ignored. */ |
| 699 | if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_init) |
| 700 | pdata->ext_cd_init(&sdhci_s3c_notify_change); |
| 701 | if (pdata->cd_type == S3C_SDHCI_CD_GPIO && |
| 702 | gpio_is_valid(pdata->ext_cd_gpio)) |
| 703 | sdhci_s3c_setup_card_detect_gpio(sc); |
| 704 | |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 705 | #ifdef CONFIG_PM_RUNTIME |
Seungwon Jeon | 0aa55c2 | 2012-10-30 14:28:36 +0900 | [diff] [blame] | 706 | if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL) |
| 707 | clk_disable_unprepare(sc->clk_io); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 708 | #endif |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 709 | return 0; |
| 710 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 711 | err_req_regs: |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 712 | #ifndef CONFIG_PM_RUNTIME |
Thomas Abraham | 0f310a0 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 713 | clk_disable_unprepare(sc->clk_bus[sc->cur_clk]); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 714 | #endif |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 715 | |
| 716 | err_no_busclks: |
Thomas Abraham | 0f310a0 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 717 | clk_disable_unprepare(sc->clk_io); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 718 | |
Tomasz Figa | b1b8fea | 2012-11-25 15:40:44 -0500 | [diff] [blame] | 719 | err_pdata_io_clk: |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 720 | sdhci_free_host(host); |
| 721 | |
| 722 | return ret; |
| 723 | } |
| 724 | |
Bill Pemberton | 6e0ee71 | 2012-11-19 13:26:03 -0500 | [diff] [blame] | 725 | static int sdhci_s3c_remove(struct platform_device *pdev) |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 726 | { |
Marek Szyprowski | 9d51a6b | 2010-07-20 13:24:33 -0700 | [diff] [blame] | 727 | struct sdhci_host *host = platform_get_drvdata(pdev); |
| 728 | struct sdhci_s3c *sc = sdhci_priv(host); |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 729 | struct s3c_sdhci_platdata *pdata = sc->pdata; |
Marek Szyprowski | 9d51a6b | 2010-07-20 13:24:33 -0700 | [diff] [blame] | 730 | |
Marek Szyprowski | 17866e1 | 2010-08-10 18:01:58 -0700 | [diff] [blame] | 731 | if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_cleanup) |
| 732 | pdata->ext_cd_cleanup(&sdhci_s3c_notify_change); |
| 733 | |
| 734 | if (sc->ext_cd_irq) |
| 735 | free_irq(sc->ext_cd_irq, sc); |
| 736 | |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 737 | #ifdef CONFIG_PM_RUNTIME |
Seungwon Jeon | 0aa55c2 | 2012-10-30 14:28:36 +0900 | [diff] [blame] | 738 | if (pdata->cd_type != S3C_SDHCI_CD_INTERNAL) |
| 739 | clk_prepare_enable(sc->clk_io); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 740 | #endif |
Marek Szyprowski | 9d51a6b | 2010-07-20 13:24:33 -0700 | [diff] [blame] | 741 | sdhci_remove_host(host, 1); |
| 742 | |
Chander Kashyap | 387a8cbd | 2012-09-14 09:08:50 +0000 | [diff] [blame] | 743 | pm_runtime_dont_use_autosuspend(&pdev->dev); |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 744 | pm_runtime_disable(&pdev->dev); |
| 745 | |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 746 | #ifndef CONFIG_PM_RUNTIME |
Thomas Abraham | 0f310a0 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 747 | clk_disable_unprepare(sc->clk_bus[sc->cur_clk]); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 748 | #endif |
Thomas Abraham | 0f310a0 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 749 | clk_disable_unprepare(sc->clk_io); |
Marek Szyprowski | 9d51a6b | 2010-07-20 13:24:33 -0700 | [diff] [blame] | 750 | |
Marek Szyprowski | 9d51a6b | 2010-07-20 13:24:33 -0700 | [diff] [blame] | 751 | sdhci_free_host(host); |
Marek Szyprowski | 9d51a6b | 2010-07-20 13:24:33 -0700 | [diff] [blame] | 752 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 753 | return 0; |
| 754 | } |
| 755 | |
Mark Brown | d5e9c02 | 2012-03-03 00:46:41 +0000 | [diff] [blame] | 756 | #ifdef CONFIG_PM_SLEEP |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 757 | static int sdhci_s3c_suspend(struct device *dev) |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 758 | { |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 759 | struct sdhci_host *host = dev_get_drvdata(dev); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 760 | |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 761 | return sdhci_suspend_host(host); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 762 | } |
| 763 | |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 764 | static int sdhci_s3c_resume(struct device *dev) |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 765 | { |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 766 | struct sdhci_host *host = dev_get_drvdata(dev); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 767 | |
Wonil Choi | 65d1351 | 2011-06-29 11:38:38 +0900 | [diff] [blame] | 768 | return sdhci_resume_host(host); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 769 | } |
Mark Brown | d5e9c02 | 2012-03-03 00:46:41 +0000 | [diff] [blame] | 770 | #endif |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 771 | |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 772 | #ifdef CONFIG_PM_RUNTIME |
| 773 | static int sdhci_s3c_runtime_suspend(struct device *dev) |
| 774 | { |
| 775 | struct sdhci_host *host = dev_get_drvdata(dev); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 776 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 777 | struct clk *busclk = ourhost->clk_io; |
| 778 | int ret; |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 779 | |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 780 | ret = sdhci_runtime_suspend_host(host); |
| 781 | |
Thomas Abraham | 0f310a0 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 782 | clk_disable_unprepare(ourhost->clk_bus[ourhost->cur_clk]); |
| 783 | clk_disable_unprepare(busclk); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 784 | return ret; |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 785 | } |
| 786 | |
| 787 | static int sdhci_s3c_runtime_resume(struct device *dev) |
| 788 | { |
| 789 | struct sdhci_host *host = dev_get_drvdata(dev); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 790 | struct sdhci_s3c *ourhost = to_s3c(host); |
| 791 | struct clk *busclk = ourhost->clk_io; |
| 792 | int ret; |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 793 | |
Thomas Abraham | 0f310a0 | 2012-10-03 08:35:43 +0900 | [diff] [blame] | 794 | clk_prepare_enable(busclk); |
| 795 | clk_prepare_enable(ourhost->clk_bus[ourhost->cur_clk]); |
Chander Kashyap | 2abeb5c | 2012-09-21 05:42:08 +0000 | [diff] [blame] | 796 | ret = sdhci_runtime_resume_host(host); |
| 797 | return ret; |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 798 | } |
| 799 | #endif |
| 800 | |
Mark Brown | d5e9c02 | 2012-03-03 00:46:41 +0000 | [diff] [blame] | 801 | #ifdef CONFIG_PM |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 802 | static const struct dev_pm_ops sdhci_s3c_pmops = { |
Mark Brown | d5e9c02 | 2012-03-03 00:46:41 +0000 | [diff] [blame] | 803 | SET_SYSTEM_SLEEP_PM_OPS(sdhci_s3c_suspend, sdhci_s3c_resume) |
Mark Brown | 9f4e815 | 2012-03-31 23:31:55 -0400 | [diff] [blame] | 804 | SET_RUNTIME_PM_OPS(sdhci_s3c_runtime_suspend, sdhci_s3c_runtime_resume, |
| 805 | NULL) |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 806 | }; |
| 807 | |
| 808 | #define SDHCI_S3C_PMOPS (&sdhci_s3c_pmops) |
| 809 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 810 | #else |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 811 | #define SDHCI_S3C_PMOPS NULL |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 812 | #endif |
| 813 | |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 814 | #if defined(CONFIG_CPU_EXYNOS4210) || defined(CONFIG_SOC_EXYNOS4212) |
| 815 | static struct sdhci_s3c_drv_data exynos4_sdhci_drv_data = { |
| 816 | .sdhci_quirks = SDHCI_QUIRK_NONSTANDARD_CLOCK, |
| 817 | }; |
| 818 | #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)&exynos4_sdhci_drv_data) |
| 819 | #else |
| 820 | #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)NULL) |
| 821 | #endif |
| 822 | |
| 823 | static struct platform_device_id sdhci_s3c_driver_ids[] = { |
| 824 | { |
| 825 | .name = "s3c-sdhci", |
| 826 | .driver_data = (kernel_ulong_t)NULL, |
| 827 | }, { |
| 828 | .name = "exynos4-sdhci", |
| 829 | .driver_data = EXYNOS4_SDHCI_DRV_DATA, |
| 830 | }, |
| 831 | { } |
| 832 | }; |
| 833 | MODULE_DEVICE_TABLE(platform, sdhci_s3c_driver_ids); |
| 834 | |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 835 | #ifdef CONFIG_OF |
| 836 | static const struct of_device_id sdhci_s3c_dt_match[] = { |
| 837 | { .compatible = "samsung,s3c6410-sdhci", }, |
| 838 | { .compatible = "samsung,exynos4210-sdhci", |
| 839 | .data = (void *)EXYNOS4_SDHCI_DRV_DATA }, |
| 840 | {}, |
| 841 | }; |
| 842 | MODULE_DEVICE_TABLE(of, sdhci_s3c_dt_match); |
| 843 | #endif |
| 844 | |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 845 | static struct platform_driver sdhci_s3c_driver = { |
| 846 | .probe = sdhci_s3c_probe, |
Bill Pemberton | 0433c14 | 2012-11-19 13:20:26 -0500 | [diff] [blame] | 847 | .remove = sdhci_s3c_remove, |
Thomas Abraham | 3119936a | 2012-02-16 22:23:58 +0900 | [diff] [blame] | 848 | .id_table = sdhci_s3c_driver_ids, |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 849 | .driver = { |
| 850 | .owner = THIS_MODULE, |
| 851 | .name = "s3c-sdhci", |
Thomas Abraham | cd1b00e | 2012-08-23 17:10:09 +0000 | [diff] [blame] | 852 | .of_match_table = of_match_ptr(sdhci_s3c_dt_match), |
Manuel Lauss | 29495aa | 2011-11-03 11:09:45 +0100 | [diff] [blame] | 853 | .pm = SDHCI_S3C_PMOPS, |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 854 | }, |
| 855 | }; |
| 856 | |
Axel Lin | d1f81a6 | 2011-11-26 12:55:43 +0800 | [diff] [blame] | 857 | module_platform_driver(sdhci_s3c_driver); |
Ben Dooks | 0d1bb41 | 2009-06-14 13:52:37 +0100 | [diff] [blame] | 858 | |
| 859 | MODULE_DESCRIPTION("Samsung SDHCI (HSMMC) glue"); |
| 860 | MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); |
| 861 | MODULE_LICENSE("GPL v2"); |
| 862 | MODULE_ALIAS("platform:s3c-sdhci"); |