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0d1bb41a BD |
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> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
0d1bb41a BD |
19 | #include <linux/clk.h> |
20 | #include <linux/io.h> | |
17866e14 | 21 | #include <linux/gpio.h> |
55156d24 | 22 | #include <linux/module.h> |
d5e9c02c MB |
23 | #include <linux/of.h> |
24 | #include <linux/of_gpio.h> | |
25 | #include <linux/pm.h> | |
9f4e8151 | 26 | #include <linux/pm_runtime.h> |
0d1bb41a BD |
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 | ||
37 | /** | |
38 | * struct sdhci_s3c - S3C SDHCI instance | |
39 | * @host: The SDHCI host created | |
40 | * @pdev: The platform device we where created from. | |
41 | * @ioarea: The resource created when we claimed the IO area. | |
42 | * @pdata: The platform data for this controller. | |
43 | * @cur_clk: The index of the current bus clock. | |
44 | * @clk_io: The clock for the internal bus interface. | |
45 | * @clk_bus: The clocks that are available for the SD/MMC bus clock. | |
46 | */ | |
47 | struct sdhci_s3c { | |
48 | struct sdhci_host *host; | |
49 | struct platform_device *pdev; | |
50 | struct resource *ioarea; | |
51 | struct s3c_sdhci_platdata *pdata; | |
52 | unsigned int cur_clk; | |
17866e14 MS |
53 | int ext_cd_irq; |
54 | int ext_cd_gpio; | |
0d1bb41a BD |
55 | |
56 | struct clk *clk_io; | |
57 | struct clk *clk_bus[MAX_BUS_CLK]; | |
58 | }; | |
59 | ||
3119936a TA |
60 | /** |
61 | * struct sdhci_s3c_driver_data - S3C SDHCI platform specific driver data | |
62 | * @sdhci_quirks: sdhci host specific quirks. | |
63 | * | |
64 | * Specifies platform specific configuration of sdhci controller. | |
65 | * Note: A structure for driver specific platform data is used for future | |
66 | * expansion of its usage. | |
67 | */ | |
68 | struct sdhci_s3c_drv_data { | |
69 | unsigned int sdhci_quirks; | |
70 | }; | |
71 | ||
0d1bb41a BD |
72 | static inline struct sdhci_s3c *to_s3c(struct sdhci_host *host) |
73 | { | |
74 | return sdhci_priv(host); | |
75 | } | |
76 | ||
77 | /** | |
78 | * get_curclk - convert ctrl2 register to clock source number | |
79 | * @ctrl2: Control2 register value. | |
80 | */ | |
81 | static u32 get_curclk(u32 ctrl2) | |
82 | { | |
83 | ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; | |
84 | ctrl2 >>= S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; | |
85 | ||
86 | return ctrl2; | |
87 | } | |
88 | ||
89 | static void sdhci_s3c_check_sclk(struct sdhci_host *host) | |
90 | { | |
91 | struct sdhci_s3c *ourhost = to_s3c(host); | |
92 | u32 tmp = readl(host->ioaddr + S3C_SDHCI_CONTROL2); | |
93 | ||
94 | if (get_curclk(tmp) != ourhost->cur_clk) { | |
95 | dev_dbg(&ourhost->pdev->dev, "restored ctrl2 clock setting\n"); | |
96 | ||
97 | tmp &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; | |
98 | tmp |= ourhost->cur_clk << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; | |
7003fecb | 99 | writel(tmp, host->ioaddr + S3C_SDHCI_CONTROL2); |
0d1bb41a BD |
100 | } |
101 | } | |
102 | ||
103 | /** | |
104 | * sdhci_s3c_get_max_clk - callback to get maximum clock frequency. | |
105 | * @host: The SDHCI host instance. | |
106 | * | |
107 | * Callback to return the maximum clock rate acheivable by the controller. | |
108 | */ | |
109 | static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host) | |
110 | { | |
111 | struct sdhci_s3c *ourhost = to_s3c(host); | |
112 | struct clk *busclk; | |
113 | unsigned int rate, max; | |
114 | int clk; | |
115 | ||
116 | /* note, a reset will reset the clock source */ | |
117 | ||
118 | sdhci_s3c_check_sclk(host); | |
119 | ||
120 | for (max = 0, clk = 0; clk < MAX_BUS_CLK; clk++) { | |
121 | busclk = ourhost->clk_bus[clk]; | |
122 | if (!busclk) | |
123 | continue; | |
124 | ||
125 | rate = clk_get_rate(busclk); | |
126 | if (rate > max) | |
127 | max = rate; | |
128 | } | |
129 | ||
130 | return max; | |
131 | } | |
132 | ||
0d1bb41a BD |
133 | /** |
134 | * sdhci_s3c_consider_clock - consider one the bus clocks for current setting | |
135 | * @ourhost: Our SDHCI instance. | |
136 | * @src: The source clock index. | |
137 | * @wanted: The clock frequency wanted. | |
138 | */ | |
139 | static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost, | |
140 | unsigned int src, | |
141 | unsigned int wanted) | |
142 | { | |
143 | unsigned long rate; | |
144 | struct clk *clksrc = ourhost->clk_bus[src]; | |
145 | int div; | |
146 | ||
147 | if (!clksrc) | |
148 | return UINT_MAX; | |
149 | ||
253e0a7c | 150 | /* |
3119936a TA |
151 | * If controller uses a non-standard clock division, find the best clock |
152 | * speed possible with selected clock source and skip the division. | |
253e0a7c | 153 | */ |
3119936a | 154 | if (ourhost->host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) { |
253e0a7c JS |
155 | rate = clk_round_rate(clksrc, wanted); |
156 | return wanted - rate; | |
157 | } | |
158 | ||
0d1bb41a BD |
159 | rate = clk_get_rate(clksrc); |
160 | ||
161 | for (div = 1; div < 256; div *= 2) { | |
162 | if ((rate / div) <= wanted) | |
163 | break; | |
164 | } | |
165 | ||
166 | dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n", | |
167 | src, rate, wanted, rate / div); | |
168 | ||
2ad0b249 | 169 | return wanted - (rate / div); |
0d1bb41a BD |
170 | } |
171 | ||
172 | /** | |
173 | * sdhci_s3c_set_clock - callback on clock change | |
174 | * @host: The SDHCI host being changed | |
175 | * @clock: The clock rate being requested. | |
176 | * | |
177 | * When the card's clock is going to be changed, look at the new frequency | |
178 | * and find the best clock source to go with it. | |
179 | */ | |
180 | static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock) | |
181 | { | |
182 | struct sdhci_s3c *ourhost = to_s3c(host); | |
183 | unsigned int best = UINT_MAX; | |
184 | unsigned int delta; | |
185 | int best_src = 0; | |
186 | int src; | |
187 | u32 ctrl; | |
188 | ||
189 | /* don't bother if the clock is going off. */ | |
190 | if (clock == 0) | |
191 | return; | |
192 | ||
193 | for (src = 0; src < MAX_BUS_CLK; src++) { | |
194 | delta = sdhci_s3c_consider_clock(ourhost, src, clock); | |
195 | if (delta < best) { | |
196 | best = delta; | |
197 | best_src = src; | |
198 | } | |
199 | } | |
200 | ||
201 | dev_dbg(&ourhost->pdev->dev, | |
202 | "selected source %d, clock %d, delta %d\n", | |
203 | best_src, clock, best); | |
204 | ||
205 | /* select the new clock source */ | |
206 | ||
207 | if (ourhost->cur_clk != best_src) { | |
208 | struct clk *clk = ourhost->clk_bus[best_src]; | |
209 | ||
210 | /* turn clock off to card before changing clock source */ | |
211 | writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL); | |
212 | ||
213 | ourhost->cur_clk = best_src; | |
214 | host->max_clk = clk_get_rate(clk); | |
0d1bb41a BD |
215 | |
216 | ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); | |
217 | ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; | |
218 | ctrl |= best_src << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; | |
219 | writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); | |
220 | } | |
221 | ||
6fe47179 TA |
222 | /* reprogram default hardware configuration */ |
223 | writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, | |
224 | host->ioaddr + S3C64XX_SDHCI_CONTROL4); | |
225 | ||
226 | ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); | |
227 | ctrl |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | | |
228 | S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | | |
229 | S3C_SDHCI_CTRL2_ENFBCLKRX | | |
230 | S3C_SDHCI_CTRL2_DFCNT_NONE | | |
231 | S3C_SDHCI_CTRL2_ENCLKOUTHOLD); | |
232 | writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); | |
233 | ||
234 | /* reconfigure the controller for new clock rate */ | |
235 | ctrl = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0); | |
236 | if (clock < 25 * 1000000) | |
237 | ctrl |= (S3C_SDHCI_CTRL3_FCSEL3 | S3C_SDHCI_CTRL3_FCSEL2); | |
238 | writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL3); | |
0d1bb41a BD |
239 | } |
240 | ||
ce5f036b MS |
241 | /** |
242 | * sdhci_s3c_get_min_clock - callback to get minimal supported clock value | |
243 | * @host: The SDHCI host being queried | |
244 | * | |
245 | * To init mmc host properly a minimal clock value is needed. For high system | |
246 | * bus clock's values the standard formula gives values out of allowed range. | |
247 | * The clock still can be set to lower values, if clock source other then | |
248 | * system bus is selected. | |
249 | */ | |
250 | static unsigned int sdhci_s3c_get_min_clock(struct sdhci_host *host) | |
251 | { | |
252 | struct sdhci_s3c *ourhost = to_s3c(host); | |
253 | unsigned int delta, min = UINT_MAX; | |
254 | int src; | |
255 | ||
256 | for (src = 0; src < MAX_BUS_CLK; src++) { | |
257 | delta = sdhci_s3c_consider_clock(ourhost, src, 0); | |
258 | if (delta == UINT_MAX) | |
259 | continue; | |
260 | /* delta is a negative value in this case */ | |
261 | if (-delta < min) | |
262 | min = -delta; | |
263 | } | |
264 | return min; | |
265 | } | |
266 | ||
253e0a7c JS |
267 | /* sdhci_cmu_get_max_clk - callback to get maximum clock frequency.*/ |
268 | static unsigned int sdhci_cmu_get_max_clock(struct sdhci_host *host) | |
269 | { | |
270 | struct sdhci_s3c *ourhost = to_s3c(host); | |
271 | ||
272 | return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], UINT_MAX); | |
273 | } | |
274 | ||
275 | /* sdhci_cmu_get_min_clock - callback to get minimal supported clock value. */ | |
276 | static unsigned int sdhci_cmu_get_min_clock(struct sdhci_host *host) | |
277 | { | |
278 | struct sdhci_s3c *ourhost = to_s3c(host); | |
279 | ||
280 | /* | |
281 | * initial clock can be in the frequency range of | |
282 | * 100KHz-400KHz, so we set it as max value. | |
283 | */ | |
284 | return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], 400000); | |
285 | } | |
286 | ||
287 | /* sdhci_cmu_set_clock - callback on clock change.*/ | |
288 | static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock) | |
289 | { | |
290 | struct sdhci_s3c *ourhost = to_s3c(host); | |
2ad0b249 | 291 | struct device *dev = &ourhost->pdev->dev; |
3119936a TA |
292 | unsigned long timeout; |
293 | u16 clk = 0; | |
253e0a7c JS |
294 | |
295 | /* don't bother if the clock is going off */ | |
296 | if (clock == 0) | |
297 | return; | |
298 | ||
299 | sdhci_s3c_set_clock(host, clock); | |
300 | ||
301 | clk_set_rate(ourhost->clk_bus[ourhost->cur_clk], clock); | |
302 | ||
303 | host->clock = clock; | |
3119936a TA |
304 | |
305 | clk = SDHCI_CLOCK_INT_EN; | |
306 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); | |
307 | ||
308 | /* Wait max 20 ms */ | |
309 | timeout = 20; | |
310 | while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL)) | |
311 | & SDHCI_CLOCK_INT_STABLE)) { | |
312 | if (timeout == 0) { | |
2ad0b249 JH |
313 | dev_err(dev, "%s: Internal clock never stabilised.\n", |
314 | mmc_hostname(host->mmc)); | |
3119936a TA |
315 | return; |
316 | } | |
317 | timeout--; | |
318 | mdelay(1); | |
319 | } | |
320 | ||
321 | clk |= SDHCI_CLOCK_CARD_EN; | |
322 | sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL); | |
253e0a7c JS |
323 | } |
324 | ||
548f07d2 JC |
325 | /** |
326 | * sdhci_s3c_platform_8bit_width - support 8bit buswidth | |
327 | * @host: The SDHCI host being queried | |
328 | * @width: MMC_BUS_WIDTH_ macro for the bus width being requested | |
329 | * | |
330 | * We have 8-bit width support but is not a v3 controller. | |
331 | * So we add platform_8bit_width() and support 8bit width. | |
332 | */ | |
333 | static int sdhci_s3c_platform_8bit_width(struct sdhci_host *host, int width) | |
334 | { | |
335 | u8 ctrl; | |
336 | ||
337 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); | |
338 | ||
339 | switch (width) { | |
340 | case MMC_BUS_WIDTH_8: | |
341 | ctrl |= SDHCI_CTRL_8BITBUS; | |
342 | ctrl &= ~SDHCI_CTRL_4BITBUS; | |
343 | break; | |
344 | case MMC_BUS_WIDTH_4: | |
345 | ctrl |= SDHCI_CTRL_4BITBUS; | |
346 | ctrl &= ~SDHCI_CTRL_8BITBUS; | |
347 | break; | |
348 | default: | |
49bb1e61 G |
349 | ctrl &= ~SDHCI_CTRL_4BITBUS; |
350 | ctrl &= ~SDHCI_CTRL_8BITBUS; | |
548f07d2 JC |
351 | break; |
352 | } | |
353 | ||
354 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); | |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
0d1bb41a BD |
359 | static struct sdhci_ops sdhci_s3c_ops = { |
360 | .get_max_clock = sdhci_s3c_get_max_clk, | |
0d1bb41a | 361 | .set_clock = sdhci_s3c_set_clock, |
ce5f036b | 362 | .get_min_clock = sdhci_s3c_get_min_clock, |
548f07d2 | 363 | .platform_8bit_width = sdhci_s3c_platform_8bit_width, |
0d1bb41a BD |
364 | }; |
365 | ||
17866e14 MS |
366 | static void sdhci_s3c_notify_change(struct platform_device *dev, int state) |
367 | { | |
368 | struct sdhci_host *host = platform_get_drvdata(dev); | |
06fe577f MS |
369 | unsigned long flags; |
370 | ||
17866e14 | 371 | if (host) { |
06fe577f | 372 | spin_lock_irqsave(&host->lock, flags); |
17866e14 MS |
373 | if (state) { |
374 | dev_dbg(&dev->dev, "card inserted.\n"); | |
375 | host->flags &= ~SDHCI_DEVICE_DEAD; | |
376 | host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; | |
377 | } else { | |
378 | dev_dbg(&dev->dev, "card removed.\n"); | |
379 | host->flags |= SDHCI_DEVICE_DEAD; | |
380 | host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION; | |
381 | } | |
f522886e | 382 | tasklet_schedule(&host->card_tasklet); |
06fe577f | 383 | spin_unlock_irqrestore(&host->lock, flags); |
17866e14 MS |
384 | } |
385 | } | |
386 | ||
387 | static irqreturn_t sdhci_s3c_gpio_card_detect_thread(int irq, void *dev_id) | |
388 | { | |
389 | struct sdhci_s3c *sc = dev_id; | |
390 | int status = gpio_get_value(sc->ext_cd_gpio); | |
391 | if (sc->pdata->ext_cd_gpio_invert) | |
392 | status = !status; | |
393 | sdhci_s3c_notify_change(sc->pdev, status); | |
394 | return IRQ_HANDLED; | |
395 | } | |
396 | ||
397 | static void sdhci_s3c_setup_card_detect_gpio(struct sdhci_s3c *sc) | |
398 | { | |
399 | struct s3c_sdhci_platdata *pdata = sc->pdata; | |
400 | struct device *dev = &sc->pdev->dev; | |
401 | ||
402 | if (gpio_request(pdata->ext_cd_gpio, "SDHCI EXT CD") == 0) { | |
403 | sc->ext_cd_gpio = pdata->ext_cd_gpio; | |
404 | sc->ext_cd_irq = gpio_to_irq(pdata->ext_cd_gpio); | |
405 | if (sc->ext_cd_irq && | |
406 | request_threaded_irq(sc->ext_cd_irq, NULL, | |
407 | sdhci_s3c_gpio_card_detect_thread, | |
2ad0b249 JH |
408 | IRQF_TRIGGER_RISING | |
409 | IRQF_TRIGGER_FALLING | | |
410 | IRQF_ONESHOT, | |
17866e14 MS |
411 | dev_name(dev), sc) == 0) { |
412 | int status = gpio_get_value(sc->ext_cd_gpio); | |
413 | if (pdata->ext_cd_gpio_invert) | |
414 | status = !status; | |
415 | sdhci_s3c_notify_change(sc->pdev, status); | |
416 | } else { | |
417 | dev_warn(dev, "cannot request irq for card detect\n"); | |
418 | sc->ext_cd_irq = 0; | |
419 | } | |
420 | } else { | |
421 | dev_err(dev, "cannot request gpio for card detect\n"); | |
422 | } | |
423 | } | |
424 | ||
3119936a TA |
425 | static inline struct sdhci_s3c_drv_data *sdhci_s3c_get_driver_data( |
426 | struct platform_device *pdev) | |
427 | { | |
428 | return (struct sdhci_s3c_drv_data *) | |
429 | platform_get_device_id(pdev)->driver_data; | |
430 | } | |
431 | ||
0d1bb41a BD |
432 | static int __devinit sdhci_s3c_probe(struct platform_device *pdev) |
433 | { | |
1d4dc338 | 434 | struct s3c_sdhci_platdata *pdata; |
3119936a | 435 | struct sdhci_s3c_drv_data *drv_data; |
0d1bb41a BD |
436 | struct device *dev = &pdev->dev; |
437 | struct sdhci_host *host; | |
438 | struct sdhci_s3c *sc; | |
439 | struct resource *res; | |
440 | int ret, irq, ptr, clks; | |
441 | ||
1d4dc338 | 442 | if (!pdev->dev.platform_data) { |
0d1bb41a BD |
443 | dev_err(dev, "no device data specified\n"); |
444 | return -ENOENT; | |
445 | } | |
446 | ||
447 | irq = platform_get_irq(pdev, 0); | |
448 | if (irq < 0) { | |
449 | dev_err(dev, "no irq specified\n"); | |
450 | return irq; | |
451 | } | |
452 | ||
0d1bb41a BD |
453 | host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c)); |
454 | if (IS_ERR(host)) { | |
455 | dev_err(dev, "sdhci_alloc_host() failed\n"); | |
456 | return PTR_ERR(host); | |
457 | } | |
458 | ||
1d4dc338 TA |
459 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); |
460 | if (!pdata) { | |
461 | ret = -ENOMEM; | |
462 | goto err_io_clk; | |
463 | } | |
464 | memcpy(pdata, pdev->dev.platform_data, sizeof(*pdata)); | |
465 | ||
3119936a | 466 | drv_data = sdhci_s3c_get_driver_data(pdev); |
0d1bb41a BD |
467 | sc = sdhci_priv(host); |
468 | ||
469 | sc->host = host; | |
470 | sc->pdev = pdev; | |
471 | sc->pdata = pdata; | |
17866e14 | 472 | sc->ext_cd_gpio = -1; /* invalid gpio number */ |
0d1bb41a BD |
473 | |
474 | platform_set_drvdata(pdev, host); | |
475 | ||
476 | sc->clk_io = clk_get(dev, "hsmmc"); | |
477 | if (IS_ERR(sc->clk_io)) { | |
478 | dev_err(dev, "failed to get io clock\n"); | |
479 | ret = PTR_ERR(sc->clk_io); | |
480 | goto err_io_clk; | |
481 | } | |
482 | ||
483 | /* enable the local io clock and keep it running for the moment. */ | |
484 | clk_enable(sc->clk_io); | |
485 | ||
486 | for (clks = 0, ptr = 0; ptr < MAX_BUS_CLK; ptr++) { | |
487 | struct clk *clk; | |
4346b6d9 | 488 | char name[14]; |
0d1bb41a | 489 | |
4346b6d9 | 490 | snprintf(name, 14, "mmc_busclk.%d", ptr); |
0d1bb41a | 491 | clk = clk_get(dev, name); |
2ad0b249 | 492 | if (IS_ERR(clk)) |
0d1bb41a | 493 | continue; |
0d1bb41a BD |
494 | |
495 | clks++; | |
496 | sc->clk_bus[ptr] = clk; | |
253e0a7c JS |
497 | |
498 | /* | |
499 | * save current clock index to know which clock bus | |
500 | * is used later in overriding functions. | |
501 | */ | |
502 | sc->cur_clk = ptr; | |
503 | ||
0d1bb41a BD |
504 | clk_enable(clk); |
505 | ||
506 | dev_info(dev, "clock source %d: %s (%ld Hz)\n", | |
507 | ptr, name, clk_get_rate(clk)); | |
508 | } | |
509 | ||
510 | if (clks == 0) { | |
511 | dev_err(dev, "failed to find any bus clocks\n"); | |
512 | ret = -ENOENT; | |
513 | goto err_no_busclks; | |
514 | } | |
515 | ||
9bda6da7 JL |
516 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
517 | host->ioaddr = devm_request_and_ioremap(&pdev->dev, res); | |
0d1bb41a BD |
518 | if (!host->ioaddr) { |
519 | dev_err(dev, "failed to map registers\n"); | |
520 | ret = -ENXIO; | |
521 | goto err_req_regs; | |
522 | } | |
523 | ||
524 | /* Ensure we have minimal gpio selected CMD/CLK/Detect */ | |
525 | if (pdata->cfg_gpio) | |
526 | pdata->cfg_gpio(pdev, pdata->max_width); | |
527 | ||
528 | host->hw_name = "samsung-hsmmc"; | |
529 | host->ops = &sdhci_s3c_ops; | |
530 | host->quirks = 0; | |
531 | host->irq = irq; | |
532 | ||
533 | /* Setup quirks for the controller */ | |
b2e75eff | 534 | host->quirks |= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC; |
a1d56460 | 535 | host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT; |
3119936a TA |
536 | if (drv_data) |
537 | host->quirks |= drv_data->sdhci_quirks; | |
0d1bb41a BD |
538 | |
539 | #ifndef CONFIG_MMC_SDHCI_S3C_DMA | |
540 | ||
541 | /* we currently see overruns on errors, so disable the SDMA | |
542 | * support as well. */ | |
543 | host->quirks |= SDHCI_QUIRK_BROKEN_DMA; | |
544 | ||
545 | #endif /* CONFIG_MMC_SDHCI_S3C_DMA */ | |
546 | ||
547 | /* It seems we do not get an DATA transfer complete on non-busy | |
548 | * transfers, not sure if this is a problem with this specific | |
549 | * SDHCI block, or a missing configuration that needs to be set. */ | |
550 | host->quirks |= SDHCI_QUIRK_NO_BUSY_IRQ; | |
551 | ||
732f0e31 KP |
552 | /* This host supports the Auto CMD12 */ |
553 | host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; | |
554 | ||
7199e2b6 JC |
555 | /* Samsung SoCs need BROKEN_ADMA_ZEROLEN_DESC */ |
556 | host->quirks |= SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC; | |
557 | ||
17866e14 MS |
558 | if (pdata->cd_type == S3C_SDHCI_CD_NONE || |
559 | pdata->cd_type == S3C_SDHCI_CD_PERMANENT) | |
560 | host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; | |
561 | ||
562 | if (pdata->cd_type == S3C_SDHCI_CD_PERMANENT) | |
563 | host->mmc->caps = MMC_CAP_NONREMOVABLE; | |
564 | ||
0d22c770 TA |
565 | switch (pdata->max_width) { |
566 | case 8: | |
567 | host->mmc->caps |= MMC_CAP_8_BIT_DATA; | |
568 | case 4: | |
569 | host->mmc->caps |= MMC_CAP_4_BIT_DATA; | |
570 | break; | |
571 | } | |
572 | ||
fa1773cc SL |
573 | if (pdata->pm_caps) |
574 | host->mmc->pm_caps |= pdata->pm_caps; | |
575 | ||
0d1bb41a BD |
576 | host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR | |
577 | SDHCI_QUIRK_32BIT_DMA_SIZE); | |
578 | ||
3fe42e07 HL |
579 | /* HSMMC on Samsung SoCs uses SDCLK as timeout clock */ |
580 | host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK; | |
581 | ||
253e0a7c JS |
582 | /* |
583 | * If controller does not have internal clock divider, | |
584 | * we can use overriding functions instead of default. | |
585 | */ | |
3119936a | 586 | if (host->quirks & SDHCI_QUIRK_NONSTANDARD_CLOCK) { |
253e0a7c JS |
587 | sdhci_s3c_ops.set_clock = sdhci_cmu_set_clock; |
588 | sdhci_s3c_ops.get_min_clock = sdhci_cmu_get_min_clock; | |
589 | sdhci_s3c_ops.get_max_clock = sdhci_cmu_get_max_clock; | |
590 | } | |
591 | ||
b3824f2c JS |
592 | /* It supports additional host capabilities if needed */ |
593 | if (pdata->host_caps) | |
594 | host->mmc->caps |= pdata->host_caps; | |
595 | ||
c1c4b66d JC |
596 | if (pdata->host_caps2) |
597 | host->mmc->caps2 |= pdata->host_caps2; | |
598 | ||
9f4e8151 MB |
599 | pm_runtime_enable(&pdev->dev); |
600 | pm_runtime_set_autosuspend_delay(&pdev->dev, 50); | |
601 | pm_runtime_use_autosuspend(&pdev->dev); | |
602 | pm_suspend_ignore_children(&pdev->dev, 1); | |
603 | ||
0d1bb41a BD |
604 | ret = sdhci_add_host(host); |
605 | if (ret) { | |
606 | dev_err(dev, "sdhci_add_host() failed\n"); | |
9f4e8151 MB |
607 | pm_runtime_forbid(&pdev->dev); |
608 | pm_runtime_get_noresume(&pdev->dev); | |
9bda6da7 | 609 | goto err_req_regs; |
0d1bb41a BD |
610 | } |
611 | ||
17866e14 MS |
612 | /* The following two methods of card detection might call |
613 | sdhci_s3c_notify_change() immediately, so they can be called | |
614 | only after sdhci_add_host(). Setup errors are ignored. */ | |
615 | if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_init) | |
616 | pdata->ext_cd_init(&sdhci_s3c_notify_change); | |
617 | if (pdata->cd_type == S3C_SDHCI_CD_GPIO && | |
618 | gpio_is_valid(pdata->ext_cd_gpio)) | |
619 | sdhci_s3c_setup_card_detect_gpio(sc); | |
620 | ||
0d1bb41a BD |
621 | return 0; |
622 | ||
0d1bb41a BD |
623 | err_req_regs: |
624 | for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) { | |
326adda5 JC |
625 | if (sc->clk_bus[ptr]) { |
626 | clk_disable(sc->clk_bus[ptr]); | |
627 | clk_put(sc->clk_bus[ptr]); | |
628 | } | |
0d1bb41a BD |
629 | } |
630 | ||
631 | err_no_busclks: | |
632 | clk_disable(sc->clk_io); | |
633 | clk_put(sc->clk_io); | |
634 | ||
635 | err_io_clk: | |
636 | sdhci_free_host(host); | |
637 | ||
638 | return ret; | |
639 | } | |
640 | ||
641 | static int __devexit sdhci_s3c_remove(struct platform_device *pdev) | |
642 | { | |
17866e14 | 643 | struct s3c_sdhci_platdata *pdata = pdev->dev.platform_data; |
9d51a6b2 MS |
644 | struct sdhci_host *host = platform_get_drvdata(pdev); |
645 | struct sdhci_s3c *sc = sdhci_priv(host); | |
646 | int ptr; | |
647 | ||
17866e14 MS |
648 | if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_cleanup) |
649 | pdata->ext_cd_cleanup(&sdhci_s3c_notify_change); | |
650 | ||
651 | if (sc->ext_cd_irq) | |
652 | free_irq(sc->ext_cd_irq, sc); | |
653 | ||
654 | if (gpio_is_valid(sc->ext_cd_gpio)) | |
655 | gpio_free(sc->ext_cd_gpio); | |
656 | ||
9d51a6b2 MS |
657 | sdhci_remove_host(host, 1); |
658 | ||
9f4e8151 MB |
659 | pm_runtime_disable(&pdev->dev); |
660 | ||
9d51a6b2 | 661 | for (ptr = 0; ptr < 3; ptr++) { |
9320f7cb MS |
662 | if (sc->clk_bus[ptr]) { |
663 | clk_disable(sc->clk_bus[ptr]); | |
664 | clk_put(sc->clk_bus[ptr]); | |
665 | } | |
9d51a6b2 MS |
666 | } |
667 | clk_disable(sc->clk_io); | |
668 | clk_put(sc->clk_io); | |
669 | ||
9d51a6b2 MS |
670 | sdhci_free_host(host); |
671 | platform_set_drvdata(pdev, NULL); | |
672 | ||
0d1bb41a BD |
673 | return 0; |
674 | } | |
675 | ||
d5e9c02c | 676 | #ifdef CONFIG_PM_SLEEP |
29495aa0 | 677 | static int sdhci_s3c_suspend(struct device *dev) |
0d1bb41a | 678 | { |
29495aa0 | 679 | struct sdhci_host *host = dev_get_drvdata(dev); |
0d1bb41a | 680 | |
29495aa0 | 681 | return sdhci_suspend_host(host); |
0d1bb41a BD |
682 | } |
683 | ||
29495aa0 | 684 | static int sdhci_s3c_resume(struct device *dev) |
0d1bb41a | 685 | { |
29495aa0 | 686 | struct sdhci_host *host = dev_get_drvdata(dev); |
0d1bb41a | 687 | |
65d13516 | 688 | return sdhci_resume_host(host); |
0d1bb41a | 689 | } |
d5e9c02c | 690 | #endif |
0d1bb41a | 691 | |
9f4e8151 MB |
692 | #ifdef CONFIG_PM_RUNTIME |
693 | static int sdhci_s3c_runtime_suspend(struct device *dev) | |
694 | { | |
695 | struct sdhci_host *host = dev_get_drvdata(dev); | |
696 | ||
697 | return sdhci_runtime_suspend_host(host); | |
698 | } | |
699 | ||
700 | static int sdhci_s3c_runtime_resume(struct device *dev) | |
701 | { | |
702 | struct sdhci_host *host = dev_get_drvdata(dev); | |
703 | ||
704 | return sdhci_runtime_resume_host(host); | |
705 | } | |
706 | #endif | |
707 | ||
d5e9c02c | 708 | #ifdef CONFIG_PM |
29495aa0 | 709 | static const struct dev_pm_ops sdhci_s3c_pmops = { |
d5e9c02c | 710 | SET_SYSTEM_SLEEP_PM_OPS(sdhci_s3c_suspend, sdhci_s3c_resume) |
9f4e8151 MB |
711 | SET_RUNTIME_PM_OPS(sdhci_s3c_runtime_suspend, sdhci_s3c_runtime_resume, |
712 | NULL) | |
29495aa0 ML |
713 | }; |
714 | ||
715 | #define SDHCI_S3C_PMOPS (&sdhci_s3c_pmops) | |
716 | ||
0d1bb41a | 717 | #else |
29495aa0 | 718 | #define SDHCI_S3C_PMOPS NULL |
0d1bb41a BD |
719 | #endif |
720 | ||
3119936a TA |
721 | #if defined(CONFIG_CPU_EXYNOS4210) || defined(CONFIG_SOC_EXYNOS4212) |
722 | static struct sdhci_s3c_drv_data exynos4_sdhci_drv_data = { | |
723 | .sdhci_quirks = SDHCI_QUIRK_NONSTANDARD_CLOCK, | |
724 | }; | |
725 | #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)&exynos4_sdhci_drv_data) | |
726 | #else | |
727 | #define EXYNOS4_SDHCI_DRV_DATA ((kernel_ulong_t)NULL) | |
728 | #endif | |
729 | ||
730 | static struct platform_device_id sdhci_s3c_driver_ids[] = { | |
731 | { | |
732 | .name = "s3c-sdhci", | |
733 | .driver_data = (kernel_ulong_t)NULL, | |
734 | }, { | |
735 | .name = "exynos4-sdhci", | |
736 | .driver_data = EXYNOS4_SDHCI_DRV_DATA, | |
737 | }, | |
738 | { } | |
739 | }; | |
740 | MODULE_DEVICE_TABLE(platform, sdhci_s3c_driver_ids); | |
741 | ||
0d1bb41a BD |
742 | static struct platform_driver sdhci_s3c_driver = { |
743 | .probe = sdhci_s3c_probe, | |
744 | .remove = __devexit_p(sdhci_s3c_remove), | |
3119936a | 745 | .id_table = sdhci_s3c_driver_ids, |
0d1bb41a BD |
746 | .driver = { |
747 | .owner = THIS_MODULE, | |
748 | .name = "s3c-sdhci", | |
29495aa0 | 749 | .pm = SDHCI_S3C_PMOPS, |
0d1bb41a BD |
750 | }, |
751 | }; | |
752 | ||
d1f81a64 | 753 | module_platform_driver(sdhci_s3c_driver); |
0d1bb41a BD |
754 | |
755 | MODULE_DESCRIPTION("Samsung SDHCI (HSMMC) glue"); | |
756 | MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); | |
757 | MODULE_LICENSE("GPL v2"); | |
758 | MODULE_ALIAS("platform:s3c-sdhci"); |