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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> |
0d1bb41a BD |
23 | |
24 | #include <linux/mmc/host.h> | |
25 | ||
26 | #include <plat/sdhci.h> | |
27 | #include <plat/regs-sdhci.h> | |
28 | ||
29 | #include "sdhci.h" | |
30 | ||
31 | #define MAX_BUS_CLK (4) | |
32 | ||
33 | /** | |
34 | * struct sdhci_s3c - S3C SDHCI instance | |
35 | * @host: The SDHCI host created | |
36 | * @pdev: The platform device we where created from. | |
37 | * @ioarea: The resource created when we claimed the IO area. | |
38 | * @pdata: The platform data for this controller. | |
39 | * @cur_clk: The index of the current bus clock. | |
40 | * @clk_io: The clock for the internal bus interface. | |
41 | * @clk_bus: The clocks that are available for the SD/MMC bus clock. | |
42 | */ | |
43 | struct sdhci_s3c { | |
44 | struct sdhci_host *host; | |
45 | struct platform_device *pdev; | |
46 | struct resource *ioarea; | |
47 | struct s3c_sdhci_platdata *pdata; | |
48 | unsigned int cur_clk; | |
17866e14 MS |
49 | int ext_cd_irq; |
50 | int ext_cd_gpio; | |
0d1bb41a BD |
51 | |
52 | struct clk *clk_io; | |
53 | struct clk *clk_bus[MAX_BUS_CLK]; | |
54 | }; | |
55 | ||
56 | static inline struct sdhci_s3c *to_s3c(struct sdhci_host *host) | |
57 | { | |
58 | return sdhci_priv(host); | |
59 | } | |
60 | ||
61 | /** | |
62 | * get_curclk - convert ctrl2 register to clock source number | |
63 | * @ctrl2: Control2 register value. | |
64 | */ | |
65 | static u32 get_curclk(u32 ctrl2) | |
66 | { | |
67 | ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; | |
68 | ctrl2 >>= S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; | |
69 | ||
70 | return ctrl2; | |
71 | } | |
72 | ||
73 | static void sdhci_s3c_check_sclk(struct sdhci_host *host) | |
74 | { | |
75 | struct sdhci_s3c *ourhost = to_s3c(host); | |
76 | u32 tmp = readl(host->ioaddr + S3C_SDHCI_CONTROL2); | |
77 | ||
78 | if (get_curclk(tmp) != ourhost->cur_clk) { | |
79 | dev_dbg(&ourhost->pdev->dev, "restored ctrl2 clock setting\n"); | |
80 | ||
81 | tmp &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; | |
82 | tmp |= ourhost->cur_clk << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; | |
83 | writel(tmp, host->ioaddr + 0x80); | |
84 | } | |
85 | } | |
86 | ||
87 | /** | |
88 | * sdhci_s3c_get_max_clk - callback to get maximum clock frequency. | |
89 | * @host: The SDHCI host instance. | |
90 | * | |
91 | * Callback to return the maximum clock rate acheivable by the controller. | |
92 | */ | |
93 | static unsigned int sdhci_s3c_get_max_clk(struct sdhci_host *host) | |
94 | { | |
95 | struct sdhci_s3c *ourhost = to_s3c(host); | |
96 | struct clk *busclk; | |
97 | unsigned int rate, max; | |
98 | int clk; | |
99 | ||
100 | /* note, a reset will reset the clock source */ | |
101 | ||
102 | sdhci_s3c_check_sclk(host); | |
103 | ||
104 | for (max = 0, clk = 0; clk < MAX_BUS_CLK; clk++) { | |
105 | busclk = ourhost->clk_bus[clk]; | |
106 | if (!busclk) | |
107 | continue; | |
108 | ||
109 | rate = clk_get_rate(busclk); | |
110 | if (rate > max) | |
111 | max = rate; | |
112 | } | |
113 | ||
114 | return max; | |
115 | } | |
116 | ||
0d1bb41a BD |
117 | /** |
118 | * sdhci_s3c_consider_clock - consider one the bus clocks for current setting | |
119 | * @ourhost: Our SDHCI instance. | |
120 | * @src: The source clock index. | |
121 | * @wanted: The clock frequency wanted. | |
122 | */ | |
123 | static unsigned int sdhci_s3c_consider_clock(struct sdhci_s3c *ourhost, | |
124 | unsigned int src, | |
125 | unsigned int wanted) | |
126 | { | |
127 | unsigned long rate; | |
128 | struct clk *clksrc = ourhost->clk_bus[src]; | |
129 | int div; | |
130 | ||
131 | if (!clksrc) | |
132 | return UINT_MAX; | |
133 | ||
253e0a7c JS |
134 | /* |
135 | * Clock divider's step is different as 1 from that of host controller | |
136 | * when 'clk_type' is S3C_SDHCI_CLK_DIV_EXTERNAL. | |
137 | */ | |
138 | if (ourhost->pdata->clk_type) { | |
139 | rate = clk_round_rate(clksrc, wanted); | |
140 | return wanted - rate; | |
141 | } | |
142 | ||
0d1bb41a BD |
143 | rate = clk_get_rate(clksrc); |
144 | ||
145 | for (div = 1; div < 256; div *= 2) { | |
146 | if ((rate / div) <= wanted) | |
147 | break; | |
148 | } | |
149 | ||
150 | dev_dbg(&ourhost->pdev->dev, "clk %d: rate %ld, want %d, got %ld\n", | |
151 | src, rate, wanted, rate / div); | |
152 | ||
153 | return (wanted - (rate / div)); | |
154 | } | |
155 | ||
156 | /** | |
157 | * sdhci_s3c_set_clock - callback on clock change | |
158 | * @host: The SDHCI host being changed | |
159 | * @clock: The clock rate being requested. | |
160 | * | |
161 | * When the card's clock is going to be changed, look at the new frequency | |
162 | * and find the best clock source to go with it. | |
163 | */ | |
164 | static void sdhci_s3c_set_clock(struct sdhci_host *host, unsigned int clock) | |
165 | { | |
166 | struct sdhci_s3c *ourhost = to_s3c(host); | |
167 | unsigned int best = UINT_MAX; | |
168 | unsigned int delta; | |
169 | int best_src = 0; | |
170 | int src; | |
171 | u32 ctrl; | |
172 | ||
173 | /* don't bother if the clock is going off. */ | |
174 | if (clock == 0) | |
175 | return; | |
176 | ||
177 | for (src = 0; src < MAX_BUS_CLK; src++) { | |
178 | delta = sdhci_s3c_consider_clock(ourhost, src, clock); | |
179 | if (delta < best) { | |
180 | best = delta; | |
181 | best_src = src; | |
182 | } | |
183 | } | |
184 | ||
185 | dev_dbg(&ourhost->pdev->dev, | |
186 | "selected source %d, clock %d, delta %d\n", | |
187 | best_src, clock, best); | |
188 | ||
189 | /* select the new clock source */ | |
190 | ||
191 | if (ourhost->cur_clk != best_src) { | |
192 | struct clk *clk = ourhost->clk_bus[best_src]; | |
193 | ||
194 | /* turn clock off to card before changing clock source */ | |
195 | writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL); | |
196 | ||
197 | ourhost->cur_clk = best_src; | |
198 | host->max_clk = clk_get_rate(clk); | |
0d1bb41a BD |
199 | |
200 | ctrl = readl(host->ioaddr + S3C_SDHCI_CONTROL2); | |
201 | ctrl &= ~S3C_SDHCI_CTRL2_SELBASECLK_MASK; | |
202 | ctrl |= best_src << S3C_SDHCI_CTRL2_SELBASECLK_SHIFT; | |
203 | writel(ctrl, host->ioaddr + S3C_SDHCI_CONTROL2); | |
204 | } | |
205 | ||
206 | /* reconfigure the hardware for new clock rate */ | |
207 | ||
208 | { | |
209 | struct mmc_ios ios; | |
210 | ||
211 | ios.clock = clock; | |
212 | ||
213 | if (ourhost->pdata->cfg_card) | |
214 | (ourhost->pdata->cfg_card)(ourhost->pdev, host->ioaddr, | |
215 | &ios, NULL); | |
216 | } | |
217 | } | |
218 | ||
ce5f036b MS |
219 | /** |
220 | * sdhci_s3c_get_min_clock - callback to get minimal supported clock value | |
221 | * @host: The SDHCI host being queried | |
222 | * | |
223 | * To init mmc host properly a minimal clock value is needed. For high system | |
224 | * bus clock's values the standard formula gives values out of allowed range. | |
225 | * The clock still can be set to lower values, if clock source other then | |
226 | * system bus is selected. | |
227 | */ | |
228 | static unsigned int sdhci_s3c_get_min_clock(struct sdhci_host *host) | |
229 | { | |
230 | struct sdhci_s3c *ourhost = to_s3c(host); | |
231 | unsigned int delta, min = UINT_MAX; | |
232 | int src; | |
233 | ||
234 | for (src = 0; src < MAX_BUS_CLK; src++) { | |
235 | delta = sdhci_s3c_consider_clock(ourhost, src, 0); | |
236 | if (delta == UINT_MAX) | |
237 | continue; | |
238 | /* delta is a negative value in this case */ | |
239 | if (-delta < min) | |
240 | min = -delta; | |
241 | } | |
242 | return min; | |
243 | } | |
244 | ||
253e0a7c JS |
245 | /* sdhci_cmu_get_max_clk - callback to get maximum clock frequency.*/ |
246 | static unsigned int sdhci_cmu_get_max_clock(struct sdhci_host *host) | |
247 | { | |
248 | struct sdhci_s3c *ourhost = to_s3c(host); | |
249 | ||
250 | return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], UINT_MAX); | |
251 | } | |
252 | ||
253 | /* sdhci_cmu_get_min_clock - callback to get minimal supported clock value. */ | |
254 | static unsigned int sdhci_cmu_get_min_clock(struct sdhci_host *host) | |
255 | { | |
256 | struct sdhci_s3c *ourhost = to_s3c(host); | |
257 | ||
258 | /* | |
259 | * initial clock can be in the frequency range of | |
260 | * 100KHz-400KHz, so we set it as max value. | |
261 | */ | |
262 | return clk_round_rate(ourhost->clk_bus[ourhost->cur_clk], 400000); | |
263 | } | |
264 | ||
265 | /* sdhci_cmu_set_clock - callback on clock change.*/ | |
266 | static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock) | |
267 | { | |
268 | struct sdhci_s3c *ourhost = to_s3c(host); | |
269 | ||
270 | /* don't bother if the clock is going off */ | |
271 | if (clock == 0) | |
272 | return; | |
273 | ||
274 | sdhci_s3c_set_clock(host, clock); | |
275 | ||
276 | clk_set_rate(ourhost->clk_bus[ourhost->cur_clk], clock); | |
277 | ||
278 | host->clock = clock; | |
279 | } | |
280 | ||
548f07d2 JC |
281 | /** |
282 | * sdhci_s3c_platform_8bit_width - support 8bit buswidth | |
283 | * @host: The SDHCI host being queried | |
284 | * @width: MMC_BUS_WIDTH_ macro for the bus width being requested | |
285 | * | |
286 | * We have 8-bit width support but is not a v3 controller. | |
287 | * So we add platform_8bit_width() and support 8bit width. | |
288 | */ | |
289 | static int sdhci_s3c_platform_8bit_width(struct sdhci_host *host, int width) | |
290 | { | |
291 | u8 ctrl; | |
292 | ||
293 | ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); | |
294 | ||
295 | switch (width) { | |
296 | case MMC_BUS_WIDTH_8: | |
297 | ctrl |= SDHCI_CTRL_8BITBUS; | |
298 | ctrl &= ~SDHCI_CTRL_4BITBUS; | |
299 | break; | |
300 | case MMC_BUS_WIDTH_4: | |
301 | ctrl |= SDHCI_CTRL_4BITBUS; | |
302 | ctrl &= ~SDHCI_CTRL_8BITBUS; | |
303 | break; | |
304 | default: | |
49bb1e61 G |
305 | ctrl &= ~SDHCI_CTRL_4BITBUS; |
306 | ctrl &= ~SDHCI_CTRL_8BITBUS; | |
548f07d2 JC |
307 | break; |
308 | } | |
309 | ||
310 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
0d1bb41a BD |
315 | static struct sdhci_ops sdhci_s3c_ops = { |
316 | .get_max_clock = sdhci_s3c_get_max_clk, | |
0d1bb41a | 317 | .set_clock = sdhci_s3c_set_clock, |
ce5f036b | 318 | .get_min_clock = sdhci_s3c_get_min_clock, |
548f07d2 | 319 | .platform_8bit_width = sdhci_s3c_platform_8bit_width, |
0d1bb41a BD |
320 | }; |
321 | ||
17866e14 MS |
322 | static void sdhci_s3c_notify_change(struct platform_device *dev, int state) |
323 | { | |
324 | struct sdhci_host *host = platform_get_drvdata(dev); | |
06fe577f MS |
325 | unsigned long flags; |
326 | ||
17866e14 | 327 | if (host) { |
06fe577f | 328 | spin_lock_irqsave(&host->lock, flags); |
17866e14 MS |
329 | if (state) { |
330 | dev_dbg(&dev->dev, "card inserted.\n"); | |
331 | host->flags &= ~SDHCI_DEVICE_DEAD; | |
332 | host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; | |
333 | } else { | |
334 | dev_dbg(&dev->dev, "card removed.\n"); | |
335 | host->flags |= SDHCI_DEVICE_DEAD; | |
336 | host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION; | |
337 | } | |
f522886e | 338 | tasklet_schedule(&host->card_tasklet); |
06fe577f | 339 | spin_unlock_irqrestore(&host->lock, flags); |
17866e14 MS |
340 | } |
341 | } | |
342 | ||
343 | static irqreturn_t sdhci_s3c_gpio_card_detect_thread(int irq, void *dev_id) | |
344 | { | |
345 | struct sdhci_s3c *sc = dev_id; | |
346 | int status = gpio_get_value(sc->ext_cd_gpio); | |
347 | if (sc->pdata->ext_cd_gpio_invert) | |
348 | status = !status; | |
349 | sdhci_s3c_notify_change(sc->pdev, status); | |
350 | return IRQ_HANDLED; | |
351 | } | |
352 | ||
353 | static void sdhci_s3c_setup_card_detect_gpio(struct sdhci_s3c *sc) | |
354 | { | |
355 | struct s3c_sdhci_platdata *pdata = sc->pdata; | |
356 | struct device *dev = &sc->pdev->dev; | |
357 | ||
358 | if (gpio_request(pdata->ext_cd_gpio, "SDHCI EXT CD") == 0) { | |
359 | sc->ext_cd_gpio = pdata->ext_cd_gpio; | |
360 | sc->ext_cd_irq = gpio_to_irq(pdata->ext_cd_gpio); | |
361 | if (sc->ext_cd_irq && | |
362 | request_threaded_irq(sc->ext_cd_irq, NULL, | |
363 | sdhci_s3c_gpio_card_detect_thread, | |
364 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
365 | dev_name(dev), sc) == 0) { | |
366 | int status = gpio_get_value(sc->ext_cd_gpio); | |
367 | if (pdata->ext_cd_gpio_invert) | |
368 | status = !status; | |
369 | sdhci_s3c_notify_change(sc->pdev, status); | |
370 | } else { | |
371 | dev_warn(dev, "cannot request irq for card detect\n"); | |
372 | sc->ext_cd_irq = 0; | |
373 | } | |
374 | } else { | |
375 | dev_err(dev, "cannot request gpio for card detect\n"); | |
376 | } | |
377 | } | |
378 | ||
0d1bb41a BD |
379 | static int __devinit sdhci_s3c_probe(struct platform_device *pdev) |
380 | { | |
381 | struct s3c_sdhci_platdata *pdata = pdev->dev.platform_data; | |
382 | struct device *dev = &pdev->dev; | |
383 | struct sdhci_host *host; | |
384 | struct sdhci_s3c *sc; | |
385 | struct resource *res; | |
386 | int ret, irq, ptr, clks; | |
387 | ||
388 | if (!pdata) { | |
389 | dev_err(dev, "no device data specified\n"); | |
390 | return -ENOENT; | |
391 | } | |
392 | ||
393 | irq = platform_get_irq(pdev, 0); | |
394 | if (irq < 0) { | |
395 | dev_err(dev, "no irq specified\n"); | |
396 | return irq; | |
397 | } | |
398 | ||
399 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
400 | if (!res) { | |
401 | dev_err(dev, "no memory specified\n"); | |
402 | return -ENOENT; | |
403 | } | |
404 | ||
405 | host = sdhci_alloc_host(dev, sizeof(struct sdhci_s3c)); | |
406 | if (IS_ERR(host)) { | |
407 | dev_err(dev, "sdhci_alloc_host() failed\n"); | |
408 | return PTR_ERR(host); | |
409 | } | |
410 | ||
411 | sc = sdhci_priv(host); | |
412 | ||
413 | sc->host = host; | |
414 | sc->pdev = pdev; | |
415 | sc->pdata = pdata; | |
17866e14 | 416 | sc->ext_cd_gpio = -1; /* invalid gpio number */ |
0d1bb41a BD |
417 | |
418 | platform_set_drvdata(pdev, host); | |
419 | ||
420 | sc->clk_io = clk_get(dev, "hsmmc"); | |
421 | if (IS_ERR(sc->clk_io)) { | |
422 | dev_err(dev, "failed to get io clock\n"); | |
423 | ret = PTR_ERR(sc->clk_io); | |
424 | goto err_io_clk; | |
425 | } | |
426 | ||
427 | /* enable the local io clock and keep it running for the moment. */ | |
428 | clk_enable(sc->clk_io); | |
429 | ||
430 | for (clks = 0, ptr = 0; ptr < MAX_BUS_CLK; ptr++) { | |
431 | struct clk *clk; | |
432 | char *name = pdata->clocks[ptr]; | |
433 | ||
434 | if (name == NULL) | |
435 | continue; | |
436 | ||
437 | clk = clk_get(dev, name); | |
438 | if (IS_ERR(clk)) { | |
439 | dev_err(dev, "failed to get clock %s\n", name); | |
440 | continue; | |
441 | } | |
442 | ||
443 | clks++; | |
444 | sc->clk_bus[ptr] = clk; | |
253e0a7c JS |
445 | |
446 | /* | |
447 | * save current clock index to know which clock bus | |
448 | * is used later in overriding functions. | |
449 | */ | |
450 | sc->cur_clk = ptr; | |
451 | ||
0d1bb41a BD |
452 | clk_enable(clk); |
453 | ||
454 | dev_info(dev, "clock source %d: %s (%ld Hz)\n", | |
455 | ptr, name, clk_get_rate(clk)); | |
456 | } | |
457 | ||
458 | if (clks == 0) { | |
459 | dev_err(dev, "failed to find any bus clocks\n"); | |
460 | ret = -ENOENT; | |
461 | goto err_no_busclks; | |
462 | } | |
463 | ||
464 | sc->ioarea = request_mem_region(res->start, resource_size(res), | |
465 | mmc_hostname(host->mmc)); | |
466 | if (!sc->ioarea) { | |
467 | dev_err(dev, "failed to reserve register area\n"); | |
468 | ret = -ENXIO; | |
469 | goto err_req_regs; | |
470 | } | |
471 | ||
472 | host->ioaddr = ioremap_nocache(res->start, resource_size(res)); | |
473 | if (!host->ioaddr) { | |
474 | dev_err(dev, "failed to map registers\n"); | |
475 | ret = -ENXIO; | |
476 | goto err_req_regs; | |
477 | } | |
478 | ||
479 | /* Ensure we have minimal gpio selected CMD/CLK/Detect */ | |
480 | if (pdata->cfg_gpio) | |
481 | pdata->cfg_gpio(pdev, pdata->max_width); | |
482 | ||
483 | host->hw_name = "samsung-hsmmc"; | |
484 | host->ops = &sdhci_s3c_ops; | |
485 | host->quirks = 0; | |
486 | host->irq = irq; | |
487 | ||
488 | /* Setup quirks for the controller */ | |
b2e75eff | 489 | host->quirks |= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC; |
a1d56460 | 490 | host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT; |
0d1bb41a BD |
491 | |
492 | #ifndef CONFIG_MMC_SDHCI_S3C_DMA | |
493 | ||
494 | /* we currently see overruns on errors, so disable the SDMA | |
495 | * support as well. */ | |
496 | host->quirks |= SDHCI_QUIRK_BROKEN_DMA; | |
497 | ||
498 | #endif /* CONFIG_MMC_SDHCI_S3C_DMA */ | |
499 | ||
500 | /* It seems we do not get an DATA transfer complete on non-busy | |
501 | * transfers, not sure if this is a problem with this specific | |
502 | * SDHCI block, or a missing configuration that needs to be set. */ | |
503 | host->quirks |= SDHCI_QUIRK_NO_BUSY_IRQ; | |
504 | ||
732f0e31 KP |
505 | /* This host supports the Auto CMD12 */ |
506 | host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; | |
507 | ||
7199e2b6 JC |
508 | /* Samsung SoCs need BROKEN_ADMA_ZEROLEN_DESC */ |
509 | host->quirks |= SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC; | |
510 | ||
17866e14 MS |
511 | if (pdata->cd_type == S3C_SDHCI_CD_NONE || |
512 | pdata->cd_type == S3C_SDHCI_CD_PERMANENT) | |
513 | host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; | |
514 | ||
515 | if (pdata->cd_type == S3C_SDHCI_CD_PERMANENT) | |
516 | host->mmc->caps = MMC_CAP_NONREMOVABLE; | |
517 | ||
548f07d2 JC |
518 | if (pdata->host_caps) |
519 | host->mmc->caps |= pdata->host_caps; | |
520 | ||
0d1bb41a BD |
521 | host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR | |
522 | SDHCI_QUIRK_32BIT_DMA_SIZE); | |
523 | ||
3fe42e07 HL |
524 | /* HSMMC on Samsung SoCs uses SDCLK as timeout clock */ |
525 | host->quirks |= SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK; | |
526 | ||
253e0a7c JS |
527 | /* |
528 | * If controller does not have internal clock divider, | |
529 | * we can use overriding functions instead of default. | |
530 | */ | |
531 | if (pdata->clk_type) { | |
532 | sdhci_s3c_ops.set_clock = sdhci_cmu_set_clock; | |
533 | sdhci_s3c_ops.get_min_clock = sdhci_cmu_get_min_clock; | |
534 | sdhci_s3c_ops.get_max_clock = sdhci_cmu_get_max_clock; | |
535 | } | |
536 | ||
b3824f2c JS |
537 | /* It supports additional host capabilities if needed */ |
538 | if (pdata->host_caps) | |
539 | host->mmc->caps |= pdata->host_caps; | |
540 | ||
0d1bb41a BD |
541 | ret = sdhci_add_host(host); |
542 | if (ret) { | |
543 | dev_err(dev, "sdhci_add_host() failed\n"); | |
544 | goto err_add_host; | |
545 | } | |
546 | ||
17866e14 MS |
547 | /* The following two methods of card detection might call |
548 | sdhci_s3c_notify_change() immediately, so they can be called | |
549 | only after sdhci_add_host(). Setup errors are ignored. */ | |
550 | if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_init) | |
551 | pdata->ext_cd_init(&sdhci_s3c_notify_change); | |
552 | if (pdata->cd_type == S3C_SDHCI_CD_GPIO && | |
553 | gpio_is_valid(pdata->ext_cd_gpio)) | |
554 | sdhci_s3c_setup_card_detect_gpio(sc); | |
555 | ||
0d1bb41a BD |
556 | return 0; |
557 | ||
558 | err_add_host: | |
559 | release_resource(sc->ioarea); | |
560 | kfree(sc->ioarea); | |
561 | ||
562 | err_req_regs: | |
563 | for (ptr = 0; ptr < MAX_BUS_CLK; ptr++) { | |
564 | clk_disable(sc->clk_bus[ptr]); | |
565 | clk_put(sc->clk_bus[ptr]); | |
566 | } | |
567 | ||
568 | err_no_busclks: | |
569 | clk_disable(sc->clk_io); | |
570 | clk_put(sc->clk_io); | |
571 | ||
572 | err_io_clk: | |
573 | sdhci_free_host(host); | |
574 | ||
575 | return ret; | |
576 | } | |
577 | ||
578 | static int __devexit sdhci_s3c_remove(struct platform_device *pdev) | |
579 | { | |
17866e14 | 580 | struct s3c_sdhci_platdata *pdata = pdev->dev.platform_data; |
9d51a6b2 MS |
581 | struct sdhci_host *host = platform_get_drvdata(pdev); |
582 | struct sdhci_s3c *sc = sdhci_priv(host); | |
583 | int ptr; | |
584 | ||
17866e14 MS |
585 | if (pdata->cd_type == S3C_SDHCI_CD_EXTERNAL && pdata->ext_cd_cleanup) |
586 | pdata->ext_cd_cleanup(&sdhci_s3c_notify_change); | |
587 | ||
588 | if (sc->ext_cd_irq) | |
589 | free_irq(sc->ext_cd_irq, sc); | |
590 | ||
591 | if (gpio_is_valid(sc->ext_cd_gpio)) | |
592 | gpio_free(sc->ext_cd_gpio); | |
593 | ||
9d51a6b2 MS |
594 | sdhci_remove_host(host, 1); |
595 | ||
596 | for (ptr = 0; ptr < 3; ptr++) { | |
9320f7cb MS |
597 | if (sc->clk_bus[ptr]) { |
598 | clk_disable(sc->clk_bus[ptr]); | |
599 | clk_put(sc->clk_bus[ptr]); | |
600 | } | |
9d51a6b2 MS |
601 | } |
602 | clk_disable(sc->clk_io); | |
603 | clk_put(sc->clk_io); | |
604 | ||
605 | iounmap(host->ioaddr); | |
606 | release_resource(sc->ioarea); | |
607 | kfree(sc->ioarea); | |
608 | ||
609 | sdhci_free_host(host); | |
610 | platform_set_drvdata(pdev, NULL); | |
611 | ||
0d1bb41a BD |
612 | return 0; |
613 | } | |
614 | ||
615 | #ifdef CONFIG_PM | |
616 | ||
617 | static int sdhci_s3c_suspend(struct platform_device *dev, pm_message_t pm) | |
618 | { | |
619 | struct sdhci_host *host = platform_get_drvdata(dev); | |
620 | ||
65d13516 | 621 | return sdhci_suspend_host(host, pm); |
0d1bb41a BD |
622 | } |
623 | ||
624 | static int sdhci_s3c_resume(struct platform_device *dev) | |
625 | { | |
626 | struct sdhci_host *host = platform_get_drvdata(dev); | |
627 | ||
65d13516 | 628 | return sdhci_resume_host(host); |
0d1bb41a BD |
629 | } |
630 | ||
631 | #else | |
632 | #define sdhci_s3c_suspend NULL | |
633 | #define sdhci_s3c_resume NULL | |
634 | #endif | |
635 | ||
636 | static struct platform_driver sdhci_s3c_driver = { | |
637 | .probe = sdhci_s3c_probe, | |
638 | .remove = __devexit_p(sdhci_s3c_remove), | |
639 | .suspend = sdhci_s3c_suspend, | |
640 | .resume = sdhci_s3c_resume, | |
641 | .driver = { | |
642 | .owner = THIS_MODULE, | |
643 | .name = "s3c-sdhci", | |
644 | }, | |
645 | }; | |
646 | ||
647 | static int __init sdhci_s3c_init(void) | |
648 | { | |
649 | return platform_driver_register(&sdhci_s3c_driver); | |
650 | } | |
651 | ||
652 | static void __exit sdhci_s3c_exit(void) | |
653 | { | |
654 | platform_driver_unregister(&sdhci_s3c_driver); | |
655 | } | |
656 | ||
657 | module_init(sdhci_s3c_init); | |
658 | module_exit(sdhci_s3c_exit); | |
659 | ||
660 | MODULE_DESCRIPTION("Samsung SDHCI (HSMMC) glue"); | |
661 | MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); | |
662 | MODULE_LICENSE("GPL v2"); | |
663 | MODULE_ALIAS("platform:s3c-sdhci"); |