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Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001/*
2 * drivers/mmc/host/omap_hsmmc.c
3 *
4 * Driver for OMAP2430/3430 MMC controller.
5 *
6 * Copyright (C) 2007 Texas Instruments.
7 *
8 * Authors:
9 * Syed Mohammed Khasim <x0khasim@ti.com>
10 * Madhusudhan <madhu.cr@ti.com>
11 * Mohit Jalori <mjalori@ti.com>
12 *
13 * This file is licensed under the terms of the GNU General Public License
14 * version 2. This program is licensed "as is" without any warranty of any
15 * kind, whether express or implied.
16 */
17
18#include <linux/module.h>
19#include <linux/init.h>
Andy Shevchenkoac330f442011-05-10 15:51:54 +030020#include <linux/kernel.h>
Denis Karpovd900f712009-09-22 16:44:38 -070021#include <linux/debugfs.h>
22#include <linux/seq_file.h>
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +010023#include <linux/interrupt.h>
24#include <linux/delay.h>
25#include <linux/dma-mapping.h>
26#include <linux/platform_device.h>
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +010027#include <linux/timer.h>
28#include <linux/clk.h>
Rajendra Nayak46856a62012-03-12 20:32:37 +053029#include <linux/of.h>
30#include <linux/of_gpio.h>
31#include <linux/of_device.h>
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +010032#include <linux/mmc/host.h>
Jarkko Lavinen13189e72009-09-22 16:44:53 -070033#include <linux/mmc/core.h>
Adrian Hunter93caf8e692010-08-11 14:17:48 -070034#include <linux/mmc/mmc.h>
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +010035#include <linux/io.h>
36#include <linux/semaphore.h>
Adrian Hunterdb0fefc2010-02-15 10:03:34 -080037#include <linux/gpio.h>
38#include <linux/regulator/consumer.h>
Balaji T Kfa4aa2d2011-07-01 22:09:35 +053039#include <linux/pm_runtime.h>
Tony Lindgrence491cf2009-10-20 09:40:47 -070040#include <plat/dma.h>
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +010041#include <mach/hardware.h>
Tony Lindgrence491cf2009-10-20 09:40:47 -070042#include <plat/board.h>
43#include <plat/mmc.h>
44#include <plat/cpu.h>
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +010045
46/* OMAP HSMMC Host Controller Registers */
47#define OMAP_HSMMC_SYSCONFIG 0x0010
Denis Karpov11dd62a2009-09-22 16:44:43 -070048#define OMAP_HSMMC_SYSSTATUS 0x0014
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +010049#define OMAP_HSMMC_CON 0x002C
50#define OMAP_HSMMC_BLK 0x0104
51#define OMAP_HSMMC_ARG 0x0108
52#define OMAP_HSMMC_CMD 0x010C
53#define OMAP_HSMMC_RSP10 0x0110
54#define OMAP_HSMMC_RSP32 0x0114
55#define OMAP_HSMMC_RSP54 0x0118
56#define OMAP_HSMMC_RSP76 0x011C
57#define OMAP_HSMMC_DATA 0x0120
58#define OMAP_HSMMC_HCTL 0x0128
59#define OMAP_HSMMC_SYSCTL 0x012C
60#define OMAP_HSMMC_STAT 0x0130
61#define OMAP_HSMMC_IE 0x0134
62#define OMAP_HSMMC_ISE 0x0138
63#define OMAP_HSMMC_CAPA 0x0140
64
65#define VS18 (1 << 26)
66#define VS30 (1 << 25)
67#define SDVS18 (0x5 << 9)
68#define SDVS30 (0x6 << 9)
David Brownelleb250822009-02-17 14:49:01 -080069#define SDVS33 (0x7 << 9)
Kim Kyuwon1b331e62009-02-20 13:10:08 +010070#define SDVS_MASK 0x00000E00
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +010071#define SDVSCLR 0xFFFFF1FF
72#define SDVSDET 0x00000400
73#define AUTOIDLE 0x1
74#define SDBP (1 << 8)
75#define DTO 0xe
76#define ICE 0x1
77#define ICS 0x2
78#define CEN (1 << 2)
79#define CLKD_MASK 0x0000FFC0
80#define CLKD_SHIFT 6
81#define DTO_MASK 0x000F0000
82#define DTO_SHIFT 16
83#define INT_EN_MASK 0x307F0033
Anand Gadiyarccdfe3a2009-09-22 16:44:21 -070084#define BWR_ENABLE (1 << 4)
85#define BRR_ENABLE (1 << 5)
Adrian Hunter93caf8e692010-08-11 14:17:48 -070086#define DTO_ENABLE (1 << 20)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +010087#define INIT_STREAM (1 << 1)
88#define DP_SELECT (1 << 21)
89#define DDIR (1 << 4)
90#define DMA_EN 0x1
91#define MSBS (1 << 5)
92#define BCE (1 << 1)
93#define FOUR_BIT (1 << 1)
Jarkko Lavinen73153012008-11-21 16:49:54 +020094#define DW8 (1 << 5)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +010095#define CC 0x1
96#define TC 0x02
97#define OD 0x1
98#define ERR (1 << 15)
99#define CMD_TIMEOUT (1 << 16)
100#define DATA_TIMEOUT (1 << 20)
101#define CMD_CRC (1 << 17)
102#define DATA_CRC (1 << 21)
103#define CARD_ERR (1 << 28)
104#define STAT_CLEAR 0xFFFFFFFF
105#define INIT_STREAM_CMD 0x00000000
106#define DUAL_VOLT_OCR_BIT 7
107#define SRC (1 << 25)
108#define SRD (1 << 26)
Denis Karpov11dd62a2009-09-22 16:44:43 -0700109#define SOFTRESET (1 << 1)
110#define RESETDONE (1 << 0)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100111
Balaji T Kfa4aa2d2011-07-01 22:09:35 +0530112#define MMC_AUTOSUSPEND_DELAY 100
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100113#define MMC_TIMEOUT_MS 20
Andy Shevchenko6b206ef2011-07-13 11:16:29 -0400114#define OMAP_MMC_MIN_CLOCK 400000
115#define OMAP_MMC_MAX_CLOCK 52000000
Kishore Kadiyala0005ae72011-02-28 20:48:05 +0530116#define DRIVER_NAME "omap_hsmmc"
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100117
118/*
119 * One controller can have multiple slots, like on some omap boards using
120 * omap.c controller driver. Luckily this is not currently done on any known
121 * omap_hsmmc.c device.
122 */
123#define mmc_slot(host) (host->pdata->slots[host->slot_id])
124
125/*
126 * MMC Host controller read/write API's
127 */
128#define OMAP_HSMMC_READ(base, reg) \
129 __raw_readl((base) + OMAP_HSMMC_##reg)
130
131#define OMAP_HSMMC_WRITE(base, reg, val) \
132 __raw_writel((val), (base) + OMAP_HSMMC_##reg)
133
Per Forlin9782aff2011-07-01 18:55:23 +0200134struct omap_hsmmc_next {
135 unsigned int dma_len;
136 s32 cookie;
137};
138
Denis Karpov70a33412009-09-22 16:44:59 -0700139struct omap_hsmmc_host {
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100140 struct device *dev;
141 struct mmc_host *mmc;
142 struct mmc_request *mrq;
143 struct mmc_command *cmd;
144 struct mmc_data *data;
145 struct clk *fclk;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100146 struct clk *dbclk;
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800147 /*
148 * vcc == configured supply
149 * vcc_aux == optional
150 * - MMC1, supply for DAT4..DAT7
151 * - MMC2/MMC2, external level shifter voltage supply, for
152 * chip (SDIO, eMMC, etc) or transceiver (MMC2 only)
153 */
154 struct regulator *vcc;
155 struct regulator *vcc_aux;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100156 void __iomem *base;
157 resource_size_t mapbase;
Adrian Hunter4dffd7a2009-09-22 16:44:58 -0700158 spinlock_t irq_lock; /* Prevent races with irq handler */
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100159 unsigned int dma_len;
Juha Yrjola0ccd76d2008-11-14 15:22:00 +0200160 unsigned int dma_sg_idx;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100161 unsigned char bus_mode;
Adrian Huntera3621462009-09-22 16:44:42 -0700162 unsigned char power_mode;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100163 u32 *buffer;
164 u32 bytesleft;
165 int suspended;
166 int irq;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100167 int use_dma, dma_ch;
Grazvydas Ignotasf3e2f1d2009-01-03 10:36:13 +0000168 int dma_line_tx, dma_line_rx;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100169 int slot_id;
Adrian Hunter2bec0892009-09-22 16:45:02 -0700170 int got_dbclk;
Adrian Hunter4a694dc2009-01-12 16:13:08 +0200171 int response_busy;
Denis Karpov11dd62a2009-09-22 16:44:43 -0700172 int context_loss;
Adrian Hunter623821f2009-09-22 16:44:51 -0700173 int vdd;
Adrian Hunterb62f6222009-09-22 16:45:01 -0700174 int protect_card;
175 int reqs_blocked;
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800176 int use_reg;
Adrian Hunterb4175772010-05-26 14:42:06 -0700177 int req_in_progress;
Per Forlin9782aff2011-07-01 18:55:23 +0200178 struct omap_hsmmc_next next_data;
Denis Karpov11dd62a2009-09-22 16:44:43 -0700179
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100180 struct omap_mmc_platform_data *pdata;
181};
182
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800183static int omap_hsmmc_card_detect(struct device *dev, int slot)
184{
185 struct omap_mmc_platform_data *mmc = dev->platform_data;
186
187 /* NOTE: assumes card detect signal is active-low */
188 return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
189}
190
191static int omap_hsmmc_get_wp(struct device *dev, int slot)
192{
193 struct omap_mmc_platform_data *mmc = dev->platform_data;
194
195 /* NOTE: assumes write protect signal is active-high */
196 return gpio_get_value_cansleep(mmc->slots[0].gpio_wp);
197}
198
199static int omap_hsmmc_get_cover_state(struct device *dev, int slot)
200{
201 struct omap_mmc_platform_data *mmc = dev->platform_data;
202
203 /* NOTE: assumes card detect signal is active-low */
204 return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
205}
206
207#ifdef CONFIG_PM
208
209static int omap_hsmmc_suspend_cdirq(struct device *dev, int slot)
210{
211 struct omap_mmc_platform_data *mmc = dev->platform_data;
212
213 disable_irq(mmc->slots[0].card_detect_irq);
214 return 0;
215}
216
217static int omap_hsmmc_resume_cdirq(struct device *dev, int slot)
218{
219 struct omap_mmc_platform_data *mmc = dev->platform_data;
220
221 enable_irq(mmc->slots[0].card_detect_irq);
222 return 0;
223}
224
225#else
226
227#define omap_hsmmc_suspend_cdirq NULL
228#define omap_hsmmc_resume_cdirq NULL
229
230#endif
231
Adrian Hunterb702b102010-02-15 10:03:35 -0800232#ifdef CONFIG_REGULATOR
233
Rajendra Nayak69b07ec2012-03-07 09:55:30 -0500234static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on,
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800235 int vdd)
236{
237 struct omap_hsmmc_host *host =
238 platform_get_drvdata(to_platform_device(dev));
239 int ret = 0;
240
241 /*
242 * If we don't see a Vcc regulator, assume it's a fixed
243 * voltage always-on regulator.
244 */
245 if (!host->vcc)
246 return 0;
Rajendra Nayak1f84b712012-03-12 20:32:38 +0530247 /*
248 * With DT, never turn OFF the regulator. This is because
249 * the pbias cell programming support is still missing when
250 * booting with Device tree
251 */
252 if (of_have_populated_dt() && !vdd)
253 return 0;
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800254
255 if (mmc_slot(host).before_set_reg)
256 mmc_slot(host).before_set_reg(dev, slot, power_on, vdd);
257
258 /*
259 * Assume Vcc regulator is used only to power the card ... OMAP
260 * VDDS is used to power the pins, optionally with a transceiver to
261 * support cards using voltages other than VDDS (1.8V nominal). When a
262 * transceiver is used, DAT3..7 are muxed as transceiver control pins.
263 *
264 * In some cases this regulator won't support enable/disable;
265 * e.g. it's a fixed rail for a WLAN chip.
266 *
267 * In other cases vcc_aux switches interface power. Example, for
268 * eMMC cards it represents VccQ. Sometimes transceivers or SDIO
269 * chips/cards need an interface voltage rail too.
270 */
271 if (power_on) {
Linus Walleij99fc5132010-09-29 01:08:27 -0400272 ret = mmc_regulator_set_ocr(host->mmc, host->vcc, vdd);
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800273 /* Enable interface voltage rail, if needed */
274 if (ret == 0 && host->vcc_aux) {
275 ret = regulator_enable(host->vcc_aux);
276 if (ret < 0)
Linus Walleij99fc5132010-09-29 01:08:27 -0400277 ret = mmc_regulator_set_ocr(host->mmc,
278 host->vcc, 0);
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800279 }
280 } else {
Linus Walleij99fc5132010-09-29 01:08:27 -0400281 /* Shut down the rail */
Adrian Hunter6da20c82010-02-15 10:03:34 -0800282 if (host->vcc_aux)
283 ret = regulator_disable(host->vcc_aux);
Linus Walleij99fc5132010-09-29 01:08:27 -0400284 if (!ret) {
285 /* Then proceed to shut down the local regulator */
286 ret = mmc_regulator_set_ocr(host->mmc,
287 host->vcc, 0);
288 }
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800289 }
290
291 if (mmc_slot(host).after_set_reg)
292 mmc_slot(host).after_set_reg(dev, slot, power_on, vdd);
293
294 return ret;
295}
296
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800297static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
298{
299 struct regulator *reg;
kishore kadiyala64be9782010-10-01 16:35:28 -0700300 int ocr_value = 0;
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800301
Rajendra Nayak1cb9af42012-03-07 09:55:31 -0500302 mmc_slot(host).set_power = omap_hsmmc_set_power;
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800303
304 reg = regulator_get(host->dev, "vmmc");
305 if (IS_ERR(reg)) {
306 dev_dbg(host->dev, "vmmc regulator missing\n");
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800307 } else {
308 host->vcc = reg;
kishore kadiyala64be9782010-10-01 16:35:28 -0700309 ocr_value = mmc_regulator_get_ocrmask(reg);
310 if (!mmc_slot(host).ocr_mask) {
311 mmc_slot(host).ocr_mask = ocr_value;
312 } else {
313 if (!(mmc_slot(host).ocr_mask & ocr_value)) {
Rajendra Nayak2cecdf02012-02-23 17:02:20 +0530314 dev_err(host->dev, "ocrmask %x is not supported\n",
Rajendra Nayake3f1adb62012-03-07 09:55:31 -0500315 mmc_slot(host).ocr_mask);
kishore kadiyala64be9782010-10-01 16:35:28 -0700316 mmc_slot(host).ocr_mask = 0;
317 return -EINVAL;
318 }
319 }
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800320
321 /* Allow an aux regulator */
322 reg = regulator_get(host->dev, "vmmc_aux");
323 host->vcc_aux = IS_ERR(reg) ? NULL : reg;
324
Balaji T Kb1c1df72011-05-30 19:55:34 +0530325 /* For eMMC do not power off when not in sleep state */
326 if (mmc_slot(host).no_regulator_off_init)
327 return 0;
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800328 /*
329 * UGLY HACK: workaround regulator framework bugs.
330 * When the bootloader leaves a supply active, it's
331 * initialized with zero usecount ... and we can't
332 * disable it without first enabling it. Until the
333 * framework is fixed, we need a workaround like this
334 * (which is safe for MMC, but not in general).
335 */
Adrian Huntere840ce12011-05-06 12:14:10 +0300336 if (regulator_is_enabled(host->vcc) > 0 ||
337 (host->vcc_aux && regulator_is_enabled(host->vcc_aux))) {
338 int vdd = ffs(mmc_slot(host).ocr_mask) - 1;
339
340 mmc_slot(host).set_power(host->dev, host->slot_id,
341 1, vdd);
342 mmc_slot(host).set_power(host->dev, host->slot_id,
343 0, 0);
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800344 }
345 }
346
347 return 0;
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800348}
349
350static void omap_hsmmc_reg_put(struct omap_hsmmc_host *host)
351{
352 regulator_put(host->vcc);
353 regulator_put(host->vcc_aux);
354 mmc_slot(host).set_power = NULL;
Adrian Hunterdb0fefc2010-02-15 10:03:34 -0800355}
356
Adrian Hunterb702b102010-02-15 10:03:35 -0800357static inline int omap_hsmmc_have_reg(void)
358{
359 return 1;
360}
361
362#else
363
364static inline int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
365{
366 return -EINVAL;
367}
368
369static inline void omap_hsmmc_reg_put(struct omap_hsmmc_host *host)
370{
371}
372
373static inline int omap_hsmmc_have_reg(void)
374{
375 return 0;
376}
377
378#endif
379
380static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata)
381{
382 int ret;
383
384 if (gpio_is_valid(pdata->slots[0].switch_pin)) {
Adrian Hunterb702b102010-02-15 10:03:35 -0800385 if (pdata->slots[0].cover)
386 pdata->slots[0].get_cover_state =
387 omap_hsmmc_get_cover_state;
388 else
389 pdata->slots[0].card_detect = omap_hsmmc_card_detect;
390 pdata->slots[0].card_detect_irq =
391 gpio_to_irq(pdata->slots[0].switch_pin);
392 ret = gpio_request(pdata->slots[0].switch_pin, "mmc_cd");
393 if (ret)
394 return ret;
395 ret = gpio_direction_input(pdata->slots[0].switch_pin);
396 if (ret)
397 goto err_free_sp;
398 } else
399 pdata->slots[0].switch_pin = -EINVAL;
400
401 if (gpio_is_valid(pdata->slots[0].gpio_wp)) {
402 pdata->slots[0].get_ro = omap_hsmmc_get_wp;
403 ret = gpio_request(pdata->slots[0].gpio_wp, "mmc_wp");
404 if (ret)
405 goto err_free_cd;
406 ret = gpio_direction_input(pdata->slots[0].gpio_wp);
407 if (ret)
408 goto err_free_wp;
409 } else
410 pdata->slots[0].gpio_wp = -EINVAL;
411
412 return 0;
413
414err_free_wp:
415 gpio_free(pdata->slots[0].gpio_wp);
416err_free_cd:
417 if (gpio_is_valid(pdata->slots[0].switch_pin))
418err_free_sp:
419 gpio_free(pdata->slots[0].switch_pin);
420 return ret;
421}
422
423static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata)
424{
425 if (gpio_is_valid(pdata->slots[0].gpio_wp))
426 gpio_free(pdata->slots[0].gpio_wp);
427 if (gpio_is_valid(pdata->slots[0].switch_pin))
428 gpio_free(pdata->slots[0].switch_pin);
429}
430
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100431/*
Andy Shevchenkoe0c7f992011-05-06 12:14:05 +0300432 * Start clock to the card
433 */
434static void omap_hsmmc_start_clock(struct omap_hsmmc_host *host)
435{
436 OMAP_HSMMC_WRITE(host->base, SYSCTL,
437 OMAP_HSMMC_READ(host->base, SYSCTL) | CEN);
438}
439
440/*
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100441 * Stop clock to the card
442 */
Denis Karpov70a33412009-09-22 16:44:59 -0700443static void omap_hsmmc_stop_clock(struct omap_hsmmc_host *host)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100444{
445 OMAP_HSMMC_WRITE(host->base, SYSCTL,
446 OMAP_HSMMC_READ(host->base, SYSCTL) & ~CEN);
447 if ((OMAP_HSMMC_READ(host->base, SYSCTL) & CEN) != 0x0)
448 dev_dbg(mmc_dev(host->mmc), "MMC Clock is not stoped\n");
449}
450
Adrian Hunter93caf8e692010-08-11 14:17:48 -0700451static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host,
452 struct mmc_command *cmd)
Adrian Hunterb4175772010-05-26 14:42:06 -0700453{
454 unsigned int irq_mask;
455
456 if (host->use_dma)
457 irq_mask = INT_EN_MASK & ~(BRR_ENABLE | BWR_ENABLE);
458 else
459 irq_mask = INT_EN_MASK;
460
Adrian Hunter93caf8e692010-08-11 14:17:48 -0700461 /* Disable timeout for erases */
462 if (cmd->opcode == MMC_ERASE)
463 irq_mask &= ~DTO_ENABLE;
464
Adrian Hunterb4175772010-05-26 14:42:06 -0700465 OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
466 OMAP_HSMMC_WRITE(host->base, ISE, irq_mask);
467 OMAP_HSMMC_WRITE(host->base, IE, irq_mask);
468}
469
470static void omap_hsmmc_disable_irq(struct omap_hsmmc_host *host)
471{
472 OMAP_HSMMC_WRITE(host->base, ISE, 0);
473 OMAP_HSMMC_WRITE(host->base, IE, 0);
474 OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
475}
476
Andy Shevchenkoac330f442011-05-10 15:51:54 +0300477/* Calculate divisor for the given clock frequency */
Balaji TKd83b6e02011-12-20 15:12:00 +0530478static u16 calc_divisor(struct omap_hsmmc_host *host, struct mmc_ios *ios)
Andy Shevchenkoac330f442011-05-10 15:51:54 +0300479{
480 u16 dsor = 0;
481
482 if (ios->clock) {
Balaji TKd83b6e02011-12-20 15:12:00 +0530483 dsor = DIV_ROUND_UP(clk_get_rate(host->fclk), ios->clock);
Andy Shevchenkoac330f442011-05-10 15:51:54 +0300484 if (dsor > 250)
485 dsor = 250;
486 }
487
488 return dsor;
489}
490
Andy Shevchenko5934df22011-05-06 12:14:06 +0300491static void omap_hsmmc_set_clock(struct omap_hsmmc_host *host)
492{
493 struct mmc_ios *ios = &host->mmc->ios;
494 unsigned long regval;
495 unsigned long timeout;
496
497 dev_dbg(mmc_dev(host->mmc), "Set clock to %uHz\n", ios->clock);
498
499 omap_hsmmc_stop_clock(host);
500
501 regval = OMAP_HSMMC_READ(host->base, SYSCTL);
502 regval = regval & ~(CLKD_MASK | DTO_MASK);
Balaji TKd83b6e02011-12-20 15:12:00 +0530503 regval = regval | (calc_divisor(host, ios) << 6) | (DTO << 16);
Andy Shevchenko5934df22011-05-06 12:14:06 +0300504 OMAP_HSMMC_WRITE(host->base, SYSCTL, regval);
505 OMAP_HSMMC_WRITE(host->base, SYSCTL,
506 OMAP_HSMMC_READ(host->base, SYSCTL) | ICE);
507
508 /* Wait till the ICS bit is set */
509 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
510 while ((OMAP_HSMMC_READ(host->base, SYSCTL) & ICS) != ICS
511 && time_before(jiffies, timeout))
512 cpu_relax();
513
514 omap_hsmmc_start_clock(host);
515}
516
Andy Shevchenko3796fb8a2011-07-13 11:31:15 -0400517static void omap_hsmmc_set_bus_width(struct omap_hsmmc_host *host)
518{
519 struct mmc_ios *ios = &host->mmc->ios;
520 u32 con;
521
522 con = OMAP_HSMMC_READ(host->base, CON);
523 switch (ios->bus_width) {
524 case MMC_BUS_WIDTH_8:
525 OMAP_HSMMC_WRITE(host->base, CON, con | DW8);
526 break;
527 case MMC_BUS_WIDTH_4:
528 OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8);
529 OMAP_HSMMC_WRITE(host->base, HCTL,
530 OMAP_HSMMC_READ(host->base, HCTL) | FOUR_BIT);
531 break;
532 case MMC_BUS_WIDTH_1:
533 OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8);
534 OMAP_HSMMC_WRITE(host->base, HCTL,
535 OMAP_HSMMC_READ(host->base, HCTL) & ~FOUR_BIT);
536 break;
537 }
538}
539
540static void omap_hsmmc_set_bus_mode(struct omap_hsmmc_host *host)
541{
542 struct mmc_ios *ios = &host->mmc->ios;
543 u32 con;
544
545 con = OMAP_HSMMC_READ(host->base, CON);
546 if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
547 OMAP_HSMMC_WRITE(host->base, CON, con | OD);
548 else
549 OMAP_HSMMC_WRITE(host->base, CON, con & ~OD);
550}
551
Denis Karpov11dd62a2009-09-22 16:44:43 -0700552#ifdef CONFIG_PM
553
554/*
555 * Restore the MMC host context, if it was lost as result of a
556 * power state change.
557 */
Denis Karpov70a33412009-09-22 16:44:59 -0700558static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host)
Denis Karpov11dd62a2009-09-22 16:44:43 -0700559{
560 struct mmc_ios *ios = &host->mmc->ios;
561 struct omap_mmc_platform_data *pdata = host->pdata;
562 int context_loss = 0;
Andy Shevchenko3796fb8a2011-07-13 11:31:15 -0400563 u32 hctl, capa;
Denis Karpov11dd62a2009-09-22 16:44:43 -0700564 unsigned long timeout;
565
566 if (pdata->get_context_loss_count) {
567 context_loss = pdata->get_context_loss_count(host->dev);
568 if (context_loss < 0)
569 return 1;
570 }
571
572 dev_dbg(mmc_dev(host->mmc), "context was %slost\n",
573 context_loss == host->context_loss ? "not " : "");
574 if (host->context_loss == context_loss)
575 return 1;
576
577 /* Wait for hardware reset */
578 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
579 while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE
580 && time_before(jiffies, timeout))
581 ;
582
583 /* Do software reset */
584 OMAP_HSMMC_WRITE(host->base, SYSCONFIG, SOFTRESET);
585 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
586 while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE
587 && time_before(jiffies, timeout))
588 ;
589
590 OMAP_HSMMC_WRITE(host->base, SYSCONFIG,
591 OMAP_HSMMC_READ(host->base, SYSCONFIG) | AUTOIDLE);
592
Balaji T Kc2200ef2012-03-07 09:55:30 -0500593 if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) {
Denis Karpov11dd62a2009-09-22 16:44:43 -0700594 if (host->power_mode != MMC_POWER_OFF &&
595 (1 << ios->vdd) <= MMC_VDD_23_24)
596 hctl = SDVS18;
597 else
598 hctl = SDVS30;
599 capa = VS30 | VS18;
600 } else {
601 hctl = SDVS18;
602 capa = VS18;
603 }
604
605 OMAP_HSMMC_WRITE(host->base, HCTL,
606 OMAP_HSMMC_READ(host->base, HCTL) | hctl);
607
608 OMAP_HSMMC_WRITE(host->base, CAPA,
609 OMAP_HSMMC_READ(host->base, CAPA) | capa);
610
611 OMAP_HSMMC_WRITE(host->base, HCTL,
612 OMAP_HSMMC_READ(host->base, HCTL) | SDBP);
613
614 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
615 while ((OMAP_HSMMC_READ(host->base, HCTL) & SDBP) != SDBP
616 && time_before(jiffies, timeout))
617 ;
618
Adrian Hunterb4175772010-05-26 14:42:06 -0700619 omap_hsmmc_disable_irq(host);
Denis Karpov11dd62a2009-09-22 16:44:43 -0700620
621 /* Do not initialize card-specific things if the power is off */
622 if (host->power_mode == MMC_POWER_OFF)
623 goto out;
624
Andy Shevchenko3796fb8a2011-07-13 11:31:15 -0400625 omap_hsmmc_set_bus_width(host);
Denis Karpov11dd62a2009-09-22 16:44:43 -0700626
Andy Shevchenko5934df22011-05-06 12:14:06 +0300627 omap_hsmmc_set_clock(host);
Denis Karpov11dd62a2009-09-22 16:44:43 -0700628
Andy Shevchenko3796fb8a2011-07-13 11:31:15 -0400629 omap_hsmmc_set_bus_mode(host);
630
Denis Karpov11dd62a2009-09-22 16:44:43 -0700631out:
632 host->context_loss = context_loss;
633
634 dev_dbg(mmc_dev(host->mmc), "context is restored\n");
635 return 0;
636}
637
638/*
639 * Save the MMC host context (store the number of power state changes so far).
640 */
Denis Karpov70a33412009-09-22 16:44:59 -0700641static void omap_hsmmc_context_save(struct omap_hsmmc_host *host)
Denis Karpov11dd62a2009-09-22 16:44:43 -0700642{
643 struct omap_mmc_platform_data *pdata = host->pdata;
644 int context_loss;
645
646 if (pdata->get_context_loss_count) {
647 context_loss = pdata->get_context_loss_count(host->dev);
648 if (context_loss < 0)
649 return;
650 host->context_loss = context_loss;
651 }
652}
653
654#else
655
Denis Karpov70a33412009-09-22 16:44:59 -0700656static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host)
Denis Karpov11dd62a2009-09-22 16:44:43 -0700657{
658 return 0;
659}
660
Denis Karpov70a33412009-09-22 16:44:59 -0700661static void omap_hsmmc_context_save(struct omap_hsmmc_host *host)
Denis Karpov11dd62a2009-09-22 16:44:43 -0700662{
663}
664
665#endif
666
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100667/*
668 * Send init stream sequence to card
669 * before sending IDLE command
670 */
Denis Karpov70a33412009-09-22 16:44:59 -0700671static void send_init_stream(struct omap_hsmmc_host *host)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100672{
673 int reg = 0;
674 unsigned long timeout;
675
Adrian Hunterb62f6222009-09-22 16:45:01 -0700676 if (host->protect_card)
677 return;
678
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100679 disable_irq(host->irq);
Adrian Hunterb4175772010-05-26 14:42:06 -0700680
681 OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100682 OMAP_HSMMC_WRITE(host->base, CON,
683 OMAP_HSMMC_READ(host->base, CON) | INIT_STREAM);
684 OMAP_HSMMC_WRITE(host->base, CMD, INIT_STREAM_CMD);
685
686 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
687 while ((reg != CC) && time_before(jiffies, timeout))
688 reg = OMAP_HSMMC_READ(host->base, STAT) & CC;
689
690 OMAP_HSMMC_WRITE(host->base, CON,
691 OMAP_HSMMC_READ(host->base, CON) & ~INIT_STREAM);
Adrian Hunterc653a6d2009-09-22 16:44:56 -0700692
693 OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
694 OMAP_HSMMC_READ(host->base, STAT);
695
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100696 enable_irq(host->irq);
697}
698
699static inline
Denis Karpov70a33412009-09-22 16:44:59 -0700700int omap_hsmmc_cover_is_closed(struct omap_hsmmc_host *host)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100701{
702 int r = 1;
703
Denis Karpov191d1f12009-09-22 16:44:55 -0700704 if (mmc_slot(host).get_cover_state)
705 r = mmc_slot(host).get_cover_state(host->dev, host->slot_id);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100706 return r;
707}
708
709static ssize_t
Denis Karpov70a33412009-09-22 16:44:59 -0700710omap_hsmmc_show_cover_switch(struct device *dev, struct device_attribute *attr,
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100711 char *buf)
712{
713 struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev);
Denis Karpov70a33412009-09-22 16:44:59 -0700714 struct omap_hsmmc_host *host = mmc_priv(mmc);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100715
Denis Karpov70a33412009-09-22 16:44:59 -0700716 return sprintf(buf, "%s\n",
717 omap_hsmmc_cover_is_closed(host) ? "closed" : "open");
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100718}
719
Denis Karpov70a33412009-09-22 16:44:59 -0700720static DEVICE_ATTR(cover_switch, S_IRUGO, omap_hsmmc_show_cover_switch, NULL);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100721
722static ssize_t
Denis Karpov70a33412009-09-22 16:44:59 -0700723omap_hsmmc_show_slot_name(struct device *dev, struct device_attribute *attr,
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100724 char *buf)
725{
726 struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev);
Denis Karpov70a33412009-09-22 16:44:59 -0700727 struct omap_hsmmc_host *host = mmc_priv(mmc);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100728
Denis Karpov191d1f12009-09-22 16:44:55 -0700729 return sprintf(buf, "%s\n", mmc_slot(host).name);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100730}
731
Denis Karpov70a33412009-09-22 16:44:59 -0700732static DEVICE_ATTR(slot_name, S_IRUGO, omap_hsmmc_show_slot_name, NULL);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100733
734/*
735 * Configure the response type and send the cmd.
736 */
737static void
Denis Karpov70a33412009-09-22 16:44:59 -0700738omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd,
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100739 struct mmc_data *data)
740{
741 int cmdreg = 0, resptype = 0, cmdtype = 0;
742
743 dev_dbg(mmc_dev(host->mmc), "%s: CMD%d, argument 0x%08x\n",
744 mmc_hostname(host->mmc), cmd->opcode, cmd->arg);
745 host->cmd = cmd;
746
Adrian Hunter93caf8e692010-08-11 14:17:48 -0700747 omap_hsmmc_enable_irq(host, cmd);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100748
Adrian Hunter4a694dc2009-01-12 16:13:08 +0200749 host->response_busy = 0;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100750 if (cmd->flags & MMC_RSP_PRESENT) {
751 if (cmd->flags & MMC_RSP_136)
752 resptype = 1;
Adrian Hunter4a694dc2009-01-12 16:13:08 +0200753 else if (cmd->flags & MMC_RSP_BUSY) {
754 resptype = 3;
755 host->response_busy = 1;
756 } else
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100757 resptype = 2;
758 }
759
760 /*
761 * Unlike OMAP1 controller, the cmdtype does not seem to be based on
762 * ac, bc, adtc, bcr. Only commands ending an open ended transfer need
763 * a val of 0x3, rest 0x0.
764 */
765 if (cmd == host->mrq->stop)
766 cmdtype = 0x3;
767
768 cmdreg = (cmd->opcode << 24) | (resptype << 16) | (cmdtype << 22);
769
770 if (data) {
771 cmdreg |= DP_SELECT | MSBS | BCE;
772 if (data->flags & MMC_DATA_READ)
773 cmdreg |= DDIR;
774 else
775 cmdreg &= ~(DDIR);
776 }
777
778 if (host->use_dma)
779 cmdreg |= DMA_EN;
780
Adrian Hunterb4175772010-05-26 14:42:06 -0700781 host->req_in_progress = 1;
Adrian Hunter4dffd7a2009-09-22 16:44:58 -0700782
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100783 OMAP_HSMMC_WRITE(host->base, ARG, cmd->arg);
784 OMAP_HSMMC_WRITE(host->base, CMD, cmdreg);
785}
786
Juha Yrjola0ccd76d2008-11-14 15:22:00 +0200787static int
Denis Karpov70a33412009-09-22 16:44:59 -0700788omap_hsmmc_get_dma_dir(struct omap_hsmmc_host *host, struct mmc_data *data)
Juha Yrjola0ccd76d2008-11-14 15:22:00 +0200789{
790 if (data->flags & MMC_DATA_WRITE)
791 return DMA_TO_DEVICE;
792 else
793 return DMA_FROM_DEVICE;
794}
795
Adrian Hunterb4175772010-05-26 14:42:06 -0700796static void omap_hsmmc_request_done(struct omap_hsmmc_host *host, struct mmc_request *mrq)
797{
798 int dma_ch;
799
800 spin_lock(&host->irq_lock);
801 host->req_in_progress = 0;
802 dma_ch = host->dma_ch;
803 spin_unlock(&host->irq_lock);
804
805 omap_hsmmc_disable_irq(host);
806 /* Do not complete the request if DMA is still in progress */
807 if (mrq->data && host->use_dma && dma_ch != -1)
808 return;
809 host->mrq = NULL;
810 mmc_request_done(host->mmc, mrq);
811}
812
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100813/*
814 * Notify the transfer complete to MMC core
815 */
816static void
Denis Karpov70a33412009-09-22 16:44:59 -0700817omap_hsmmc_xfer_done(struct omap_hsmmc_host *host, struct mmc_data *data)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100818{
Adrian Hunter4a694dc2009-01-12 16:13:08 +0200819 if (!data) {
820 struct mmc_request *mrq = host->mrq;
821
Adrian Hunter23050102009-09-22 16:44:57 -0700822 /* TC before CC from CMD6 - don't know why, but it happens */
823 if (host->cmd && host->cmd->opcode == 6 &&
824 host->response_busy) {
825 host->response_busy = 0;
826 return;
827 }
828
Adrian Hunterb4175772010-05-26 14:42:06 -0700829 omap_hsmmc_request_done(host, mrq);
Adrian Hunter4a694dc2009-01-12 16:13:08 +0200830 return;
831 }
832
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100833 host->data = NULL;
834
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100835 if (!data->error)
836 data->bytes_xfered += data->blocks * (data->blksz);
837 else
838 data->bytes_xfered = 0;
839
840 if (!data->stop) {
Adrian Hunterb4175772010-05-26 14:42:06 -0700841 omap_hsmmc_request_done(host, data->mrq);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100842 return;
843 }
Denis Karpov70a33412009-09-22 16:44:59 -0700844 omap_hsmmc_start_command(host, data->stop, NULL);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100845}
846
847/*
848 * Notify the core about command completion
849 */
850static void
Denis Karpov70a33412009-09-22 16:44:59 -0700851omap_hsmmc_cmd_done(struct omap_hsmmc_host *host, struct mmc_command *cmd)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100852{
853 host->cmd = NULL;
854
855 if (cmd->flags & MMC_RSP_PRESENT) {
856 if (cmd->flags & MMC_RSP_136) {
857 /* response type 2 */
858 cmd->resp[3] = OMAP_HSMMC_READ(host->base, RSP10);
859 cmd->resp[2] = OMAP_HSMMC_READ(host->base, RSP32);
860 cmd->resp[1] = OMAP_HSMMC_READ(host->base, RSP54);
861 cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP76);
862 } else {
863 /* response types 1, 1b, 3, 4, 5, 6 */
864 cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP10);
865 }
866 }
Adrian Hunterb4175772010-05-26 14:42:06 -0700867 if ((host->data == NULL && !host->response_busy) || cmd->error)
868 omap_hsmmc_request_done(host, cmd->mrq);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100869}
870
871/*
872 * DMA clean up for command errors
873 */
Denis Karpov70a33412009-09-22 16:44:59 -0700874static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100875{
Adrian Hunterb4175772010-05-26 14:42:06 -0700876 int dma_ch;
877
Jarkko Lavinen82788ff2008-12-05 12:31:46 +0200878 host->data->error = errno;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100879
Adrian Hunterb4175772010-05-26 14:42:06 -0700880 spin_lock(&host->irq_lock);
881 dma_ch = host->dma_ch;
882 host->dma_ch = -1;
883 spin_unlock(&host->irq_lock);
884
885 if (host->use_dma && dma_ch != -1) {
Per Forlina9120c32011-06-17 20:14:21 +0200886 dma_unmap_sg(mmc_dev(host->mmc), host->data->sg,
887 host->data->sg_len,
Denis Karpov70a33412009-09-22 16:44:59 -0700888 omap_hsmmc_get_dma_dir(host, host->data));
Adrian Hunterb4175772010-05-26 14:42:06 -0700889 omap_free_dma(dma_ch);
Per Forlin053bf342011-11-07 21:55:11 +0530890 host->data->host_cookie = 0;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100891 }
892 host->data = NULL;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100893}
894
895/*
896 * Readable error output
897 */
898#ifdef CONFIG_MMC_DEBUG
Adrian Hunter699b9582011-05-06 12:14:01 +0300899static void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host, u32 status)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100900{
901 /* --- means reserved bit without definition at documentation */
Denis Karpov70a33412009-09-22 16:44:59 -0700902 static const char *omap_hsmmc_status_bits[] = {
Adrian Hunter699b9582011-05-06 12:14:01 +0300903 "CC" , "TC" , "BGE", "---", "BWR" , "BRR" , "---" , "---" ,
904 "CIRQ", "OBI" , "---", "---", "---" , "---" , "---" , "ERRI",
905 "CTO" , "CCRC", "CEB", "CIE", "DTO" , "DCRC", "DEB" , "---" ,
906 "ACE" , "---" , "---", "---", "CERR", "BADA", "---" , "---"
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100907 };
908 char res[256];
909 char *buf = res;
910 int len, i;
911
912 len = sprintf(buf, "MMC IRQ 0x%x :", status);
913 buf += len;
914
Denis Karpov70a33412009-09-22 16:44:59 -0700915 for (i = 0; i < ARRAY_SIZE(omap_hsmmc_status_bits); i++)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100916 if (status & (1 << i)) {
Denis Karpov70a33412009-09-22 16:44:59 -0700917 len = sprintf(buf, " %s", omap_hsmmc_status_bits[i]);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100918 buf += len;
919 }
920
921 dev_dbg(mmc_dev(host->mmc), "%s\n", res);
922}
Adrian Hunter699b9582011-05-06 12:14:01 +0300923#else
924static inline void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host,
925 u32 status)
926{
927}
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100928#endif /* CONFIG_MMC_DEBUG */
929
Jean Pihet3ebf74b2009-02-06 16:42:51 +0100930/*
931 * MMC controller internal state machines reset
932 *
933 * Used to reset command or data internal state machines, using respectively
934 * SRC or SRD bit of SYSCTL register
935 * Can be called from interrupt context
936 */
Denis Karpov70a33412009-09-22 16:44:59 -0700937static inline void omap_hsmmc_reset_controller_fsm(struct omap_hsmmc_host *host,
938 unsigned long bit)
Jean Pihet3ebf74b2009-02-06 16:42:51 +0100939{
940 unsigned long i = 0;
941 unsigned long limit = (loops_per_jiffy *
942 msecs_to_jiffies(MMC_TIMEOUT_MS));
943
944 OMAP_HSMMC_WRITE(host->base, SYSCTL,
945 OMAP_HSMMC_READ(host->base, SYSCTL) | bit);
946
Madhusudhan Chikkature07ad64b2010-10-01 16:35:25 -0700947 /*
948 * OMAP4 ES2 and greater has an updated reset logic.
949 * Monitor a 0->1 transition first
950 */
951 if (mmc_slot(host).features & HSMMC_HAS_UPDATED_RESET) {
kishore kadiyalab432b4b2010-11-17 22:35:32 -0500952 while ((!(OMAP_HSMMC_READ(host->base, SYSCTL) & bit))
Madhusudhan Chikkature07ad64b2010-10-01 16:35:25 -0700953 && (i++ < limit))
954 cpu_relax();
955 }
956 i = 0;
957
Jean Pihet3ebf74b2009-02-06 16:42:51 +0100958 while ((OMAP_HSMMC_READ(host->base, SYSCTL) & bit) &&
959 (i++ < limit))
960 cpu_relax();
961
962 if (OMAP_HSMMC_READ(host->base, SYSCTL) & bit)
963 dev_err(mmc_dev(host->mmc),
964 "Timeout waiting on controller reset in %s\n",
965 __func__);
966}
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100967
Adrian Hunterb4175772010-05-26 14:42:06 -0700968static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100969{
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100970 struct mmc_data *data;
Adrian Hunterb4175772010-05-26 14:42:06 -0700971 int end_cmd = 0, end_trans = 0;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100972
Adrian Hunterb4175772010-05-26 14:42:06 -0700973 if (!host->req_in_progress) {
974 do {
975 OMAP_HSMMC_WRITE(host->base, STAT, status);
976 /* Flush posted write */
977 status = OMAP_HSMMC_READ(host->base, STAT);
978 } while (status & INT_EN_MASK);
979 return;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100980 }
981
982 data = host->data;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100983 dev_dbg(mmc_dev(host->mmc), "IRQ Status is %x\n", status);
984
985 if (status & ERR) {
Adrian Hunter699b9582011-05-06 12:14:01 +0300986 omap_hsmmc_dbg_report_irq(host, status);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100987 if ((status & CMD_TIMEOUT) ||
988 (status & CMD_CRC)) {
989 if (host->cmd) {
990 if (status & CMD_TIMEOUT) {
Denis Karpov70a33412009-09-22 16:44:59 -0700991 omap_hsmmc_reset_controller_fsm(host,
992 SRC);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +0100993 host->cmd->error = -ETIMEDOUT;
994 } else {
995 host->cmd->error = -EILSEQ;
996 }
997 end_cmd = 1;
998 }
Adrian Hunter4a694dc2009-01-12 16:13:08 +0200999 if (host->data || host->response_busy) {
1000 if (host->data)
Denis Karpov70a33412009-09-22 16:44:59 -07001001 omap_hsmmc_dma_cleanup(host,
1002 -ETIMEDOUT);
Adrian Hunter4a694dc2009-01-12 16:13:08 +02001003 host->response_busy = 0;
Denis Karpov70a33412009-09-22 16:44:59 -07001004 omap_hsmmc_reset_controller_fsm(host, SRD);
Jean Pihetc232f452009-02-11 13:11:39 -08001005 }
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001006 }
1007 if ((status & DATA_TIMEOUT) ||
1008 (status & DATA_CRC)) {
Adrian Hunter4a694dc2009-01-12 16:13:08 +02001009 if (host->data || host->response_busy) {
1010 int err = (status & DATA_TIMEOUT) ?
1011 -ETIMEDOUT : -EILSEQ;
1012
1013 if (host->data)
Denis Karpov70a33412009-09-22 16:44:59 -07001014 omap_hsmmc_dma_cleanup(host, err);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001015 else
Adrian Hunter4a694dc2009-01-12 16:13:08 +02001016 host->mrq->cmd->error = err;
1017 host->response_busy = 0;
Denis Karpov70a33412009-09-22 16:44:59 -07001018 omap_hsmmc_reset_controller_fsm(host, SRD);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001019 end_trans = 1;
1020 }
1021 }
1022 if (status & CARD_ERR) {
1023 dev_dbg(mmc_dev(host->mmc),
1024 "Ignoring card err CMD%d\n", host->cmd->opcode);
1025 if (host->cmd)
1026 end_cmd = 1;
1027 if (host->data)
1028 end_trans = 1;
1029 }
1030 }
1031
1032 OMAP_HSMMC_WRITE(host->base, STAT, status);
1033
Jarkko Lavinena8fe29d2009-04-08 11:18:32 +03001034 if (end_cmd || ((status & CC) && host->cmd))
Denis Karpov70a33412009-09-22 16:44:59 -07001035 omap_hsmmc_cmd_done(host, host->cmd);
Jarkko Lavinen0a40e642009-09-22 16:44:54 -07001036 if ((end_trans || (status & TC)) && host->mrq)
Denis Karpov70a33412009-09-22 16:44:59 -07001037 omap_hsmmc_xfer_done(host, data);
Adrian Hunterb4175772010-05-26 14:42:06 -07001038}
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001039
Adrian Hunterb4175772010-05-26 14:42:06 -07001040/*
1041 * MMC controller IRQ handler
1042 */
1043static irqreturn_t omap_hsmmc_irq(int irq, void *dev_id)
1044{
1045 struct omap_hsmmc_host *host = dev_id;
1046 int status;
1047
1048 status = OMAP_HSMMC_READ(host->base, STAT);
1049 do {
1050 omap_hsmmc_do_irq(host, status);
1051 /* Flush posted write */
1052 status = OMAP_HSMMC_READ(host->base, STAT);
1053 } while (status & INT_EN_MASK);
Adrian Hunter4dffd7a2009-09-22 16:44:58 -07001054
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001055 return IRQ_HANDLED;
1056}
1057
Denis Karpov70a33412009-09-22 16:44:59 -07001058static void set_sd_bus_power(struct omap_hsmmc_host *host)
Adrian Huntere13bb302009-03-12 17:08:26 +02001059{
1060 unsigned long i;
1061
1062 OMAP_HSMMC_WRITE(host->base, HCTL,
1063 OMAP_HSMMC_READ(host->base, HCTL) | SDBP);
1064 for (i = 0; i < loops_per_jiffy; i++) {
1065 if (OMAP_HSMMC_READ(host->base, HCTL) & SDBP)
1066 break;
1067 cpu_relax();
1068 }
1069}
1070
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001071/*
David Brownelleb250822009-02-17 14:49:01 -08001072 * Switch MMC interface voltage ... only relevant for MMC1.
1073 *
1074 * MMC2 and MMC3 use fixed 1.8V levels, and maybe a transceiver.
1075 * The MMC2 transceiver controls are used instead of DAT4..DAT7.
1076 * Some chips, like eMMC ones, use internal transceivers.
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001077 */
Denis Karpov70a33412009-09-22 16:44:59 -07001078static int omap_hsmmc_switch_opcond(struct omap_hsmmc_host *host, int vdd)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001079{
1080 u32 reg_val = 0;
1081 int ret;
1082
1083 /* Disable the clocks */
Balaji T Kfa4aa2d2011-07-01 22:09:35 +05301084 pm_runtime_put_sync(host->dev);
Adrian Hunter2bec0892009-09-22 16:45:02 -07001085 if (host->got_dbclk)
1086 clk_disable(host->dbclk);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001087
1088 /* Turn the power off */
1089 ret = mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001090
1091 /* Turn the power ON with given VDD 1.8 or 3.0v */
Adrian Hunter2bec0892009-09-22 16:45:02 -07001092 if (!ret)
1093 ret = mmc_slot(host).set_power(host->dev, host->slot_id, 1,
1094 vdd);
Balaji T Kfa4aa2d2011-07-01 22:09:35 +05301095 pm_runtime_get_sync(host->dev);
Adrian Hunter2bec0892009-09-22 16:45:02 -07001096 if (host->got_dbclk)
1097 clk_enable(host->dbclk);
1098
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001099 if (ret != 0)
1100 goto err;
1101
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001102 OMAP_HSMMC_WRITE(host->base, HCTL,
1103 OMAP_HSMMC_READ(host->base, HCTL) & SDVSCLR);
1104 reg_val = OMAP_HSMMC_READ(host->base, HCTL);
David Brownelleb250822009-02-17 14:49:01 -08001105
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001106 /*
1107 * If a MMC dual voltage card is detected, the set_ios fn calls
1108 * this fn with VDD bit set for 1.8V. Upon card removal from the
Denis Karpov70a33412009-09-22 16:44:59 -07001109 * slot, omap_hsmmc_set_ios sets the VDD back to 3V on MMC_POWER_OFF.
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001110 *
David Brownelleb250822009-02-17 14:49:01 -08001111 * Cope with a bit of slop in the range ... per data sheets:
1112 * - "1.8V" for vdds_mmc1/vdds_mmc1a can be up to 2.45V max,
1113 * but recommended values are 1.71V to 1.89V
1114 * - "3.0V" for vdds_mmc1/vdds_mmc1a can be up to 3.5V max,
1115 * but recommended values are 2.7V to 3.3V
1116 *
1117 * Board setup code shouldn't permit anything very out-of-range.
1118 * TWL4030-family VMMC1 and VSIM regulators are fine (avoiding the
1119 * middle range) but VSIM can't power DAT4..DAT7 at more than 3V.
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001120 */
David Brownelleb250822009-02-17 14:49:01 -08001121 if ((1 << vdd) <= MMC_VDD_23_24)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001122 reg_val |= SDVS18;
David Brownelleb250822009-02-17 14:49:01 -08001123 else
1124 reg_val |= SDVS30;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001125
1126 OMAP_HSMMC_WRITE(host->base, HCTL, reg_val);
Adrian Huntere13bb302009-03-12 17:08:26 +02001127 set_sd_bus_power(host);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001128
1129 return 0;
1130err:
1131 dev_dbg(mmc_dev(host->mmc), "Unable to switch operating voltage\n");
1132 return ret;
1133}
1134
Adrian Hunterb62f6222009-09-22 16:45:01 -07001135/* Protect the card while the cover is open */
1136static void omap_hsmmc_protect_card(struct omap_hsmmc_host *host)
1137{
1138 if (!mmc_slot(host).get_cover_state)
1139 return;
1140
1141 host->reqs_blocked = 0;
1142 if (mmc_slot(host).get_cover_state(host->dev, host->slot_id)) {
1143 if (host->protect_card) {
Rajendra Nayak2cecdf02012-02-23 17:02:20 +05301144 dev_info(host->dev, "%s: cover is closed, "
Adrian Hunterb62f6222009-09-22 16:45:01 -07001145 "card is now accessible\n",
1146 mmc_hostname(host->mmc));
1147 host->protect_card = 0;
1148 }
1149 } else {
1150 if (!host->protect_card) {
Rajendra Nayak2cecdf02012-02-23 17:02:20 +05301151 dev_info(host->dev, "%s: cover is open, "
Adrian Hunterb62f6222009-09-22 16:45:01 -07001152 "card is now inaccessible\n",
1153 mmc_hostname(host->mmc));
1154 host->protect_card = 1;
1155 }
1156 }
1157}
1158
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001159/*
NeilBrown7efab4f2011-12-30 12:35:13 +11001160 * irq handler to notify the core about card insertion/removal
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001161 */
NeilBrown7efab4f2011-12-30 12:35:13 +11001162static irqreturn_t omap_hsmmc_detect(int irq, void *dev_id)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001163{
NeilBrown7efab4f2011-12-30 12:35:13 +11001164 struct omap_hsmmc_host *host = dev_id;
David Brownell249d0fa2009-02-04 14:42:03 -08001165 struct omap_mmc_slot_data *slot = &mmc_slot(host);
Adrian Huntera6b22402009-09-22 16:44:45 -07001166 int carddetect;
David Brownell249d0fa2009-02-04 14:42:03 -08001167
Adrian Huntera6b22402009-09-22 16:44:45 -07001168 if (host->suspended)
NeilBrown7efab4f2011-12-30 12:35:13 +11001169 return IRQ_HANDLED;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001170
1171 sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch");
Adrian Huntera6b22402009-09-22 16:44:45 -07001172
Denis Karpov191d1f12009-09-22 16:44:55 -07001173 if (slot->card_detect)
Adrian Hunterdb0fefc2010-02-15 10:03:34 -08001174 carddetect = slot->card_detect(host->dev, host->slot_id);
Adrian Hunterb62f6222009-09-22 16:45:01 -07001175 else {
1176 omap_hsmmc_protect_card(host);
Adrian Huntera6b22402009-09-22 16:44:45 -07001177 carddetect = -ENOSYS;
Adrian Hunterb62f6222009-09-22 16:45:01 -07001178 }
Adrian Huntera6b22402009-09-22 16:44:45 -07001179
Madhusudhan Chikkaturecdeebad2010-04-06 14:34:49 -07001180 if (carddetect)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001181 mmc_detect_change(host->mmc, (HZ * 200) / 1000);
Madhusudhan Chikkaturecdeebad2010-04-06 14:34:49 -07001182 else
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001183 mmc_detect_change(host->mmc, (HZ * 50) / 1000);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001184 return IRQ_HANDLED;
1185}
1186
Denis Karpov70a33412009-09-22 16:44:59 -07001187static int omap_hsmmc_get_dma_sync_dev(struct omap_hsmmc_host *host,
Juha Yrjola0ccd76d2008-11-14 15:22:00 +02001188 struct mmc_data *data)
1189{
1190 int sync_dev;
1191
Grazvydas Ignotasf3e2f1d2009-01-03 10:36:13 +00001192 if (data->flags & MMC_DATA_WRITE)
1193 sync_dev = host->dma_line_tx;
1194 else
1195 sync_dev = host->dma_line_rx;
Juha Yrjola0ccd76d2008-11-14 15:22:00 +02001196 return sync_dev;
1197}
1198
Denis Karpov70a33412009-09-22 16:44:59 -07001199static void omap_hsmmc_config_dma_params(struct omap_hsmmc_host *host,
Juha Yrjola0ccd76d2008-11-14 15:22:00 +02001200 struct mmc_data *data,
1201 struct scatterlist *sgl)
1202{
1203 int blksz, nblk, dma_ch;
1204
1205 dma_ch = host->dma_ch;
1206 if (data->flags & MMC_DATA_WRITE) {
1207 omap_set_dma_dest_params(dma_ch, 0, OMAP_DMA_AMODE_CONSTANT,
1208 (host->mapbase + OMAP_HSMMC_DATA), 0, 0);
1209 omap_set_dma_src_params(dma_ch, 0, OMAP_DMA_AMODE_POST_INC,
1210 sg_dma_address(sgl), 0, 0);
1211 } else {
1212 omap_set_dma_src_params(dma_ch, 0, OMAP_DMA_AMODE_CONSTANT,
Denis Karpov191d1f12009-09-22 16:44:55 -07001213 (host->mapbase + OMAP_HSMMC_DATA), 0, 0);
Juha Yrjola0ccd76d2008-11-14 15:22:00 +02001214 omap_set_dma_dest_params(dma_ch, 0, OMAP_DMA_AMODE_POST_INC,
1215 sg_dma_address(sgl), 0, 0);
1216 }
1217
1218 blksz = host->data->blksz;
1219 nblk = sg_dma_len(sgl) / blksz;
1220
1221 omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S32,
1222 blksz / 4, nblk, OMAP_DMA_SYNC_FRAME,
Denis Karpov70a33412009-09-22 16:44:59 -07001223 omap_hsmmc_get_dma_sync_dev(host, data),
Juha Yrjola0ccd76d2008-11-14 15:22:00 +02001224 !(data->flags & MMC_DATA_WRITE));
1225
1226 omap_start_dma(dma_ch);
1227}
1228
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001229/*
1230 * DMA call back function
1231 */
Adrian Hunterb4175772010-05-26 14:42:06 -07001232static void omap_hsmmc_dma_cb(int lch, u16 ch_status, void *cb_data)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001233{
Adrian Hunterb4175772010-05-26 14:42:06 -07001234 struct omap_hsmmc_host *host = cb_data;
Adrian Hunter770d7432011-05-06 12:14:11 +03001235 struct mmc_data *data;
Adrian Hunterb4175772010-05-26 14:42:06 -07001236 int dma_ch, req_in_progress;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001237
Venkatraman Sf3584e52010-08-10 18:01:54 -07001238 if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) {
1239 dev_warn(mmc_dev(host->mmc), "unexpected dma status %x\n",
1240 ch_status);
1241 return;
1242 }
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001243
Adrian Hunterb4175772010-05-26 14:42:06 -07001244 spin_lock(&host->irq_lock);
1245 if (host->dma_ch < 0) {
1246 spin_unlock(&host->irq_lock);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001247 return;
Adrian Hunterb4175772010-05-26 14:42:06 -07001248 }
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001249
Adrian Hunter770d7432011-05-06 12:14:11 +03001250 data = host->mrq->data;
Juha Yrjola0ccd76d2008-11-14 15:22:00 +02001251 host->dma_sg_idx++;
1252 if (host->dma_sg_idx < host->dma_len) {
1253 /* Fire up the next transfer. */
Adrian Hunterb4175772010-05-26 14:42:06 -07001254 omap_hsmmc_config_dma_params(host, data,
1255 data->sg + host->dma_sg_idx);
1256 spin_unlock(&host->irq_lock);
Juha Yrjola0ccd76d2008-11-14 15:22:00 +02001257 return;
1258 }
1259
Per Forlin9782aff2011-07-01 18:55:23 +02001260 if (!data->host_cookie)
1261 dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
1262 omap_hsmmc_get_dma_dir(host, data));
Adrian Hunterb4175772010-05-26 14:42:06 -07001263
1264 req_in_progress = host->req_in_progress;
1265 dma_ch = host->dma_ch;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001266 host->dma_ch = -1;
Adrian Hunterb4175772010-05-26 14:42:06 -07001267 spin_unlock(&host->irq_lock);
1268
1269 omap_free_dma(dma_ch);
1270
1271 /* If DMA has finished after TC, complete the request */
1272 if (!req_in_progress) {
1273 struct mmc_request *mrq = host->mrq;
1274
1275 host->mrq = NULL;
1276 mmc_request_done(host->mmc, mrq);
1277 }
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001278}
1279
Per Forlin9782aff2011-07-01 18:55:23 +02001280static int omap_hsmmc_pre_dma_transfer(struct omap_hsmmc_host *host,
1281 struct mmc_data *data,
1282 struct omap_hsmmc_next *next)
1283{
1284 int dma_len;
1285
1286 if (!next && data->host_cookie &&
1287 data->host_cookie != host->next_data.cookie) {
Rajendra Nayak2cecdf02012-02-23 17:02:20 +05301288 dev_warn(host->dev, "[%s] invalid cookie: data->host_cookie %d"
Per Forlin9782aff2011-07-01 18:55:23 +02001289 " host->next_data.cookie %d\n",
1290 __func__, data->host_cookie, host->next_data.cookie);
1291 data->host_cookie = 0;
1292 }
1293
1294 /* Check if next job is already prepared */
1295 if (next ||
1296 (!next && data->host_cookie != host->next_data.cookie)) {
1297 dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg,
1298 data->sg_len,
1299 omap_hsmmc_get_dma_dir(host, data));
1300
1301 } else {
1302 dma_len = host->next_data.dma_len;
1303 host->next_data.dma_len = 0;
1304 }
1305
1306
1307 if (dma_len == 0)
1308 return -EINVAL;
1309
1310 if (next) {
1311 next->dma_len = dma_len;
1312 data->host_cookie = ++next->cookie < 0 ? 1 : next->cookie;
1313 } else
1314 host->dma_len = dma_len;
1315
1316 return 0;
1317}
1318
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001319/*
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001320 * Routine to configure and start DMA for the MMC card
1321 */
Denis Karpov70a33412009-09-22 16:44:59 -07001322static int omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host,
1323 struct mmc_request *req)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001324{
Adrian Hunterb4175772010-05-26 14:42:06 -07001325 int dma_ch = 0, ret = 0, i;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001326 struct mmc_data *data = req->data;
1327
Juha Yrjola0ccd76d2008-11-14 15:22:00 +02001328 /* Sanity check: all the SG entries must be aligned by block size. */
Jarkko Lavinena3f406f2009-09-22 16:44:46 -07001329 for (i = 0; i < data->sg_len; i++) {
Juha Yrjola0ccd76d2008-11-14 15:22:00 +02001330 struct scatterlist *sgl;
1331
1332 sgl = data->sg + i;
1333 if (sgl->length % data->blksz)
1334 return -EINVAL;
1335 }
1336 if ((data->blksz % 4) != 0)
1337 /* REVISIT: The MMC buffer increments only when MSB is written.
1338 * Return error for blksz which is non multiple of four.
1339 */
1340 return -EINVAL;
1341
Adrian Hunterb4175772010-05-26 14:42:06 -07001342 BUG_ON(host->dma_ch != -1);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001343
Denis Karpov70a33412009-09-22 16:44:59 -07001344 ret = omap_request_dma(omap_hsmmc_get_dma_sync_dev(host, data),
1345 "MMC/SD", omap_hsmmc_dma_cb, host, &dma_ch);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001346 if (ret != 0) {
Juha Yrjola0ccd76d2008-11-14 15:22:00 +02001347 dev_err(mmc_dev(host->mmc),
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001348 "%s: omap_request_dma() failed with %d\n",
1349 mmc_hostname(host->mmc), ret);
1350 return ret;
1351 }
Per Forlin9782aff2011-07-01 18:55:23 +02001352 ret = omap_hsmmc_pre_dma_transfer(host, data, NULL);
1353 if (ret)
1354 return ret;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001355
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001356 host->dma_ch = dma_ch;
Juha Yrjola0ccd76d2008-11-14 15:22:00 +02001357 host->dma_sg_idx = 0;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001358
Denis Karpov70a33412009-09-22 16:44:59 -07001359 omap_hsmmc_config_dma_params(host, data, data->sg);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001360
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001361 return 0;
1362}
1363
Denis Karpov70a33412009-09-22 16:44:59 -07001364static void set_data_timeout(struct omap_hsmmc_host *host,
Adrian Huntere2bf08d2009-09-22 16:45:03 -07001365 unsigned int timeout_ns,
1366 unsigned int timeout_clks)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001367{
1368 unsigned int timeout, cycle_ns;
1369 uint32_t reg, clkd, dto = 0;
1370
1371 reg = OMAP_HSMMC_READ(host->base, SYSCTL);
1372 clkd = (reg & CLKD_MASK) >> CLKD_SHIFT;
1373 if (clkd == 0)
1374 clkd = 1;
1375
1376 cycle_ns = 1000000000 / (clk_get_rate(host->fclk) / clkd);
Adrian Huntere2bf08d2009-09-22 16:45:03 -07001377 timeout = timeout_ns / cycle_ns;
1378 timeout += timeout_clks;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001379 if (timeout) {
1380 while ((timeout & 0x80000000) == 0) {
1381 dto += 1;
1382 timeout <<= 1;
1383 }
1384 dto = 31 - dto;
1385 timeout <<= 1;
1386 if (timeout && dto)
1387 dto += 1;
1388 if (dto >= 13)
1389 dto -= 13;
1390 else
1391 dto = 0;
1392 if (dto > 14)
1393 dto = 14;
1394 }
1395
1396 reg &= ~DTO_MASK;
1397 reg |= dto << DTO_SHIFT;
1398 OMAP_HSMMC_WRITE(host->base, SYSCTL, reg);
1399}
1400
1401/*
1402 * Configure block length for MMC/SD cards and initiate the transfer.
1403 */
1404static int
Denis Karpov70a33412009-09-22 16:44:59 -07001405omap_hsmmc_prepare_data(struct omap_hsmmc_host *host, struct mmc_request *req)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001406{
1407 int ret;
1408 host->data = req->data;
1409
1410 if (req->data == NULL) {
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001411 OMAP_HSMMC_WRITE(host->base, BLK, 0);
Adrian Huntere2bf08d2009-09-22 16:45:03 -07001412 /*
1413 * Set an arbitrary 100ms data timeout for commands with
1414 * busy signal.
1415 */
1416 if (req->cmd->flags & MMC_RSP_BUSY)
1417 set_data_timeout(host, 100000000U, 0);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001418 return 0;
1419 }
1420
1421 OMAP_HSMMC_WRITE(host->base, BLK, (req->data->blksz)
1422 | (req->data->blocks << 16));
Adrian Huntere2bf08d2009-09-22 16:45:03 -07001423 set_data_timeout(host, req->data->timeout_ns, req->data->timeout_clks);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001424
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001425 if (host->use_dma) {
Denis Karpov70a33412009-09-22 16:44:59 -07001426 ret = omap_hsmmc_start_dma_transfer(host, req);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001427 if (ret != 0) {
1428 dev_dbg(mmc_dev(host->mmc), "MMC start dma failure\n");
1429 return ret;
1430 }
1431 }
1432 return 0;
1433}
1434
Per Forlin9782aff2011-07-01 18:55:23 +02001435static void omap_hsmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
1436 int err)
1437{
1438 struct omap_hsmmc_host *host = mmc_priv(mmc);
1439 struct mmc_data *data = mrq->data;
1440
1441 if (host->use_dma) {
Per Forlin053bf342011-11-07 21:55:11 +05301442 if (data->host_cookie)
1443 dma_unmap_sg(mmc_dev(host->mmc), data->sg,
1444 data->sg_len,
1445 omap_hsmmc_get_dma_dir(host, data));
Per Forlin9782aff2011-07-01 18:55:23 +02001446 data->host_cookie = 0;
1447 }
1448}
1449
1450static void omap_hsmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
1451 bool is_first_req)
1452{
1453 struct omap_hsmmc_host *host = mmc_priv(mmc);
1454
1455 if (mrq->data->host_cookie) {
1456 mrq->data->host_cookie = 0;
1457 return ;
1458 }
1459
1460 if (host->use_dma)
1461 if (omap_hsmmc_pre_dma_transfer(host, mrq->data,
1462 &host->next_data))
1463 mrq->data->host_cookie = 0;
1464}
1465
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001466/*
1467 * Request function. for read/write operation
1468 */
Denis Karpov70a33412009-09-22 16:44:59 -07001469static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001470{
Denis Karpov70a33412009-09-22 16:44:59 -07001471 struct omap_hsmmc_host *host = mmc_priv(mmc);
Jarkko Lavinena3f406f2009-09-22 16:44:46 -07001472 int err;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001473
Adrian Hunterb4175772010-05-26 14:42:06 -07001474 BUG_ON(host->req_in_progress);
1475 BUG_ON(host->dma_ch != -1);
1476 if (host->protect_card) {
1477 if (host->reqs_blocked < 3) {
1478 /*
1479 * Ensure the controller is left in a consistent
1480 * state by resetting the command and data state
1481 * machines.
1482 */
1483 omap_hsmmc_reset_controller_fsm(host, SRD);
1484 omap_hsmmc_reset_controller_fsm(host, SRC);
1485 host->reqs_blocked += 1;
1486 }
1487 req->cmd->error = -EBADF;
1488 if (req->data)
1489 req->data->error = -EBADF;
1490 req->cmd->retries = 0;
1491 mmc_request_done(mmc, req);
1492 return;
1493 } else if (host->reqs_blocked)
1494 host->reqs_blocked = 0;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001495 WARN_ON(host->mrq != NULL);
1496 host->mrq = req;
Denis Karpov70a33412009-09-22 16:44:59 -07001497 err = omap_hsmmc_prepare_data(host, req);
Jarkko Lavinena3f406f2009-09-22 16:44:46 -07001498 if (err) {
1499 req->cmd->error = err;
1500 if (req->data)
1501 req->data->error = err;
1502 host->mrq = NULL;
1503 mmc_request_done(mmc, req);
1504 return;
1505 }
1506
Denis Karpov70a33412009-09-22 16:44:59 -07001507 omap_hsmmc_start_command(host, req->cmd, req->data);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001508}
1509
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001510/* Routine to configure clock values. Exposed API to core */
Denis Karpov70a33412009-09-22 16:44:59 -07001511static void omap_hsmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001512{
Denis Karpov70a33412009-09-22 16:44:59 -07001513 struct omap_hsmmc_host *host = mmc_priv(mmc);
Adrian Huntera3621462009-09-22 16:44:42 -07001514 int do_send_init_stream = 0;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001515
Balaji T Kfa4aa2d2011-07-01 22:09:35 +05301516 pm_runtime_get_sync(host->dev);
Adrian Hunter5e2ea612009-09-22 16:44:39 -07001517
Adrian Huntera3621462009-09-22 16:44:42 -07001518 if (ios->power_mode != host->power_mode) {
1519 switch (ios->power_mode) {
1520 case MMC_POWER_OFF:
1521 mmc_slot(host).set_power(host->dev, host->slot_id,
1522 0, 0);
Adrian Hunter623821f2009-09-22 16:44:51 -07001523 host->vdd = 0;
Adrian Huntera3621462009-09-22 16:44:42 -07001524 break;
1525 case MMC_POWER_UP:
1526 mmc_slot(host).set_power(host->dev, host->slot_id,
1527 1, ios->vdd);
Adrian Hunter623821f2009-09-22 16:44:51 -07001528 host->vdd = ios->vdd;
Adrian Huntera3621462009-09-22 16:44:42 -07001529 break;
1530 case MMC_POWER_ON:
1531 do_send_init_stream = 1;
1532 break;
1533 }
1534 host->power_mode = ios->power_mode;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001535 }
1536
Denis Karpovdd498ef2009-09-22 16:44:49 -07001537 /* FIXME: set registers based only on changes to ios */
1538
Andy Shevchenko3796fb8a2011-07-13 11:31:15 -04001539 omap_hsmmc_set_bus_width(host);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001540
Kishore Kadiyala4621d5f2011-02-28 20:48:04 +05301541 if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) {
David Brownelleb250822009-02-17 14:49:01 -08001542 /* Only MMC1 can interface at 3V without some flavor
1543 * of external transceiver; but they all handle 1.8V.
1544 */
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001545 if ((OMAP_HSMMC_READ(host->base, HCTL) & SDVSDET) &&
Rajendra Nayak1f84b712012-03-12 20:32:38 +05301546 (ios->vdd == DUAL_VOLT_OCR_BIT) &&
1547 /*
1548 * With pbias cell programming missing, this
1549 * can't be allowed when booting with device
1550 * tree.
1551 */
1552 (!of_have_populated_dt())) {
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001553 /*
1554 * The mmc_select_voltage fn of the core does
1555 * not seem to set the power_mode to
1556 * MMC_POWER_UP upon recalculating the voltage.
1557 * vdd 1.8v.
1558 */
Denis Karpov70a33412009-09-22 16:44:59 -07001559 if (omap_hsmmc_switch_opcond(host, ios->vdd) != 0)
1560 dev_dbg(mmc_dev(host->mmc),
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001561 "Switch operation failed\n");
1562 }
1563 }
1564
Andy Shevchenko5934df22011-05-06 12:14:06 +03001565 omap_hsmmc_set_clock(host);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001566
Adrian Huntera3621462009-09-22 16:44:42 -07001567 if (do_send_init_stream)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001568 send_init_stream(host);
1569
Andy Shevchenko3796fb8a2011-07-13 11:31:15 -04001570 omap_hsmmc_set_bus_mode(host);
Adrian Hunter5e2ea612009-09-22 16:44:39 -07001571
Balaji T Kfa4aa2d2011-07-01 22:09:35 +05301572 pm_runtime_put_autosuspend(host->dev);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001573}
1574
1575static int omap_hsmmc_get_cd(struct mmc_host *mmc)
1576{
Denis Karpov70a33412009-09-22 16:44:59 -07001577 struct omap_hsmmc_host *host = mmc_priv(mmc);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001578
Denis Karpov191d1f12009-09-22 16:44:55 -07001579 if (!mmc_slot(host).card_detect)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001580 return -ENOSYS;
Adrian Hunterdb0fefc2010-02-15 10:03:34 -08001581 return mmc_slot(host).card_detect(host->dev, host->slot_id);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001582}
1583
1584static int omap_hsmmc_get_ro(struct mmc_host *mmc)
1585{
Denis Karpov70a33412009-09-22 16:44:59 -07001586 struct omap_hsmmc_host *host = mmc_priv(mmc);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001587
Denis Karpov191d1f12009-09-22 16:44:55 -07001588 if (!mmc_slot(host).get_ro)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001589 return -ENOSYS;
Denis Karpov191d1f12009-09-22 16:44:55 -07001590 return mmc_slot(host).get_ro(host->dev, 0);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001591}
1592
Grazvydas Ignotas48168582010-08-10 18:01:52 -07001593static void omap_hsmmc_init_card(struct mmc_host *mmc, struct mmc_card *card)
1594{
1595 struct omap_hsmmc_host *host = mmc_priv(mmc);
1596
1597 if (mmc_slot(host).init_card)
1598 mmc_slot(host).init_card(card);
1599}
1600
Denis Karpov70a33412009-09-22 16:44:59 -07001601static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host)
Kim Kyuwon1b331e62009-02-20 13:10:08 +01001602{
1603 u32 hctl, capa, value;
1604
1605 /* Only MMC1 supports 3.0V */
Kishore Kadiyala4621d5f2011-02-28 20:48:04 +05301606 if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) {
Kim Kyuwon1b331e62009-02-20 13:10:08 +01001607 hctl = SDVS30;
1608 capa = VS30 | VS18;
1609 } else {
1610 hctl = SDVS18;
1611 capa = VS18;
1612 }
1613
1614 value = OMAP_HSMMC_READ(host->base, HCTL) & ~SDVS_MASK;
1615 OMAP_HSMMC_WRITE(host->base, HCTL, value | hctl);
1616
1617 value = OMAP_HSMMC_READ(host->base, CAPA);
1618 OMAP_HSMMC_WRITE(host->base, CAPA, value | capa);
1619
1620 /* Set the controller to AUTO IDLE mode */
1621 value = OMAP_HSMMC_READ(host->base, SYSCONFIG);
1622 OMAP_HSMMC_WRITE(host->base, SYSCONFIG, value | AUTOIDLE);
1623
1624 /* Set SD bus power bit */
Adrian Huntere13bb302009-03-12 17:08:26 +02001625 set_sd_bus_power(host);
Kim Kyuwon1b331e62009-02-20 13:10:08 +01001626}
1627
Denis Karpov70a33412009-09-22 16:44:59 -07001628static int omap_hsmmc_enable_fclk(struct mmc_host *mmc)
Denis Karpovdd498ef2009-09-22 16:44:49 -07001629{
Denis Karpov70a33412009-09-22 16:44:59 -07001630 struct omap_hsmmc_host *host = mmc_priv(mmc);
Denis Karpovdd498ef2009-09-22 16:44:49 -07001631
Balaji T Kfa4aa2d2011-07-01 22:09:35 +05301632 pm_runtime_get_sync(host->dev);
1633
Denis Karpovdd498ef2009-09-22 16:44:49 -07001634 return 0;
1635}
1636
Adrian Hunter907d2e72012-02-29 09:17:21 +02001637static int omap_hsmmc_disable_fclk(struct mmc_host *mmc)
Denis Karpovdd498ef2009-09-22 16:44:49 -07001638{
Denis Karpov70a33412009-09-22 16:44:59 -07001639 struct omap_hsmmc_host *host = mmc_priv(mmc);
Denis Karpovdd498ef2009-09-22 16:44:49 -07001640
Balaji T Kfa4aa2d2011-07-01 22:09:35 +05301641 pm_runtime_mark_last_busy(host->dev);
1642 pm_runtime_put_autosuspend(host->dev);
1643
Denis Karpovdd498ef2009-09-22 16:44:49 -07001644 return 0;
1645}
1646
Denis Karpov70a33412009-09-22 16:44:59 -07001647static const struct mmc_host_ops omap_hsmmc_ops = {
1648 .enable = omap_hsmmc_enable_fclk,
1649 .disable = omap_hsmmc_disable_fclk,
Per Forlin9782aff2011-07-01 18:55:23 +02001650 .post_req = omap_hsmmc_post_req,
1651 .pre_req = omap_hsmmc_pre_req,
Denis Karpov70a33412009-09-22 16:44:59 -07001652 .request = omap_hsmmc_request,
1653 .set_ios = omap_hsmmc_set_ios,
Denis Karpovdd498ef2009-09-22 16:44:49 -07001654 .get_cd = omap_hsmmc_get_cd,
1655 .get_ro = omap_hsmmc_get_ro,
Grazvydas Ignotas48168582010-08-10 18:01:52 -07001656 .init_card = omap_hsmmc_init_card,
Denis Karpovdd498ef2009-09-22 16:44:49 -07001657 /* NYET -- enable_sdio_irq */
1658};
1659
Denis Karpovd900f712009-09-22 16:44:38 -07001660#ifdef CONFIG_DEBUG_FS
1661
Denis Karpov70a33412009-09-22 16:44:59 -07001662static int omap_hsmmc_regs_show(struct seq_file *s, void *data)
Denis Karpovd900f712009-09-22 16:44:38 -07001663{
1664 struct mmc_host *mmc = s->private;
Denis Karpov70a33412009-09-22 16:44:59 -07001665 struct omap_hsmmc_host *host = mmc_priv(mmc);
Denis Karpov11dd62a2009-09-22 16:44:43 -07001666 int context_loss = 0;
1667
Denis Karpov70a33412009-09-22 16:44:59 -07001668 if (host->pdata->get_context_loss_count)
1669 context_loss = host->pdata->get_context_loss_count(host->dev);
Denis Karpovd900f712009-09-22 16:44:38 -07001670
Adrian Hunter907d2e72012-02-29 09:17:21 +02001671 seq_printf(s, "mmc%d:\n ctx_loss:\t%d:%d\n\nregs:\n",
1672 mmc->index, host->context_loss, context_loss);
Adrian Hunter5e2ea612009-09-22 16:44:39 -07001673
Balaji T K7a8c2ce2011-07-01 22:09:34 +05301674 if (host->suspended) {
Denis Karpovdd498ef2009-09-22 16:44:49 -07001675 seq_printf(s, "host suspended, can't read registers\n");
1676 return 0;
1677 }
1678
Balaji T Kfa4aa2d2011-07-01 22:09:35 +05301679 pm_runtime_get_sync(host->dev);
Denis Karpovd900f712009-09-22 16:44:38 -07001680
1681 seq_printf(s, "SYSCONFIG:\t0x%08x\n",
1682 OMAP_HSMMC_READ(host->base, SYSCONFIG));
1683 seq_printf(s, "CON:\t\t0x%08x\n",
1684 OMAP_HSMMC_READ(host->base, CON));
1685 seq_printf(s, "HCTL:\t\t0x%08x\n",
1686 OMAP_HSMMC_READ(host->base, HCTL));
1687 seq_printf(s, "SYSCTL:\t\t0x%08x\n",
1688 OMAP_HSMMC_READ(host->base, SYSCTL));
1689 seq_printf(s, "IE:\t\t0x%08x\n",
1690 OMAP_HSMMC_READ(host->base, IE));
1691 seq_printf(s, "ISE:\t\t0x%08x\n",
1692 OMAP_HSMMC_READ(host->base, ISE));
1693 seq_printf(s, "CAPA:\t\t0x%08x\n",
1694 OMAP_HSMMC_READ(host->base, CAPA));
Adrian Hunter5e2ea612009-09-22 16:44:39 -07001695
Balaji T Kfa4aa2d2011-07-01 22:09:35 +05301696 pm_runtime_mark_last_busy(host->dev);
1697 pm_runtime_put_autosuspend(host->dev);
Denis Karpovdd498ef2009-09-22 16:44:49 -07001698
Denis Karpovd900f712009-09-22 16:44:38 -07001699 return 0;
1700}
1701
Denis Karpov70a33412009-09-22 16:44:59 -07001702static int omap_hsmmc_regs_open(struct inode *inode, struct file *file)
Denis Karpovd900f712009-09-22 16:44:38 -07001703{
Denis Karpov70a33412009-09-22 16:44:59 -07001704 return single_open(file, omap_hsmmc_regs_show, inode->i_private);
Denis Karpovd900f712009-09-22 16:44:38 -07001705}
1706
1707static const struct file_operations mmc_regs_fops = {
Denis Karpov70a33412009-09-22 16:44:59 -07001708 .open = omap_hsmmc_regs_open,
Denis Karpovd900f712009-09-22 16:44:38 -07001709 .read = seq_read,
1710 .llseek = seq_lseek,
1711 .release = single_release,
1712};
1713
Denis Karpov70a33412009-09-22 16:44:59 -07001714static void omap_hsmmc_debugfs(struct mmc_host *mmc)
Denis Karpovd900f712009-09-22 16:44:38 -07001715{
1716 if (mmc->debugfs_root)
1717 debugfs_create_file("regs", S_IRUSR, mmc->debugfs_root,
1718 mmc, &mmc_regs_fops);
1719}
1720
1721#else
1722
Denis Karpov70a33412009-09-22 16:44:59 -07001723static void omap_hsmmc_debugfs(struct mmc_host *mmc)
Denis Karpovd900f712009-09-22 16:44:38 -07001724{
1725}
1726
1727#endif
1728
Rajendra Nayak46856a62012-03-12 20:32:37 +05301729#ifdef CONFIG_OF
1730static u16 omap4_reg_offset = 0x100;
1731
1732static const struct of_device_id omap_mmc_of_match[] = {
1733 {
1734 .compatible = "ti,omap2-hsmmc",
1735 },
1736 {
1737 .compatible = "ti,omap3-hsmmc",
1738 },
1739 {
1740 .compatible = "ti,omap4-hsmmc",
1741 .data = &omap4_reg_offset,
1742 },
1743 {},
Chris Ballb6d085f2012-04-10 09:57:36 -04001744};
Rajendra Nayak46856a62012-03-12 20:32:37 +05301745MODULE_DEVICE_TABLE(of, omap_mmc_of_match);
1746
1747static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
1748{
1749 struct omap_mmc_platform_data *pdata;
1750 struct device_node *np = dev->of_node;
1751 u32 bus_width;
1752
1753 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
1754 if (!pdata)
1755 return NULL; /* out of memory */
1756
1757 if (of_find_property(np, "ti,dual-volt", NULL))
1758 pdata->controller_flags |= OMAP_HSMMC_SUPPORTS_DUAL_VOLT;
1759
1760 /* This driver only supports 1 slot */
1761 pdata->nr_slots = 1;
1762 pdata->slots[0].switch_pin = of_get_named_gpio(np, "cd-gpios", 0);
1763 pdata->slots[0].gpio_wp = of_get_named_gpio(np, "wp-gpios", 0);
1764
1765 if (of_find_property(np, "ti,non-removable", NULL)) {
1766 pdata->slots[0].nonremovable = true;
1767 pdata->slots[0].no_regulator_off_init = true;
1768 }
1769 of_property_read_u32(np, "ti,bus-width", &bus_width);
1770 if (bus_width == 4)
1771 pdata->slots[0].caps |= MMC_CAP_4_BIT_DATA;
1772 else if (bus_width == 8)
1773 pdata->slots[0].caps |= MMC_CAP_8_BIT_DATA;
1774
1775 if (of_find_property(np, "ti,needs-special-reset", NULL))
1776 pdata->slots[0].features |= HSMMC_HAS_UPDATED_RESET;
1777
1778 return pdata;
1779}
1780#else
1781static inline struct omap_mmc_platform_data
1782 *of_get_hsmmc_pdata(struct device *dev)
1783{
1784 return NULL;
1785}
1786#endif
1787
Felipe Balbiefa25fd2012-03-14 11:18:28 +02001788static int __devinit omap_hsmmc_probe(struct platform_device *pdev)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001789{
1790 struct omap_mmc_platform_data *pdata = pdev->dev.platform_data;
1791 struct mmc_host *mmc;
Denis Karpov70a33412009-09-22 16:44:59 -07001792 struct omap_hsmmc_host *host = NULL;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001793 struct resource *res;
Adrian Hunterdb0fefc2010-02-15 10:03:34 -08001794 int ret, irq;
Rajendra Nayak46856a62012-03-12 20:32:37 +05301795 const struct of_device_id *match;
1796
1797 match = of_match_device(of_match_ptr(omap_mmc_of_match), &pdev->dev);
1798 if (match) {
1799 pdata = of_get_hsmmc_pdata(&pdev->dev);
1800 if (match->data) {
1801 u16 *offsetp = match->data;
1802 pdata->reg_offset = *offsetp;
1803 }
1804 }
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001805
1806 if (pdata == NULL) {
1807 dev_err(&pdev->dev, "Platform Data is missing\n");
1808 return -ENXIO;
1809 }
1810
1811 if (pdata->nr_slots == 0) {
1812 dev_err(&pdev->dev, "No Slots\n");
1813 return -ENXIO;
1814 }
1815
1816 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1817 irq = platform_get_irq(pdev, 0);
1818 if (res == NULL || irq < 0)
1819 return -ENXIO;
1820
Chris Ball984b2032011-03-22 16:34:42 -07001821 res = request_mem_region(res->start, resource_size(res), pdev->name);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001822 if (res == NULL)
1823 return -EBUSY;
1824
Adrian Hunterdb0fefc2010-02-15 10:03:34 -08001825 ret = omap_hsmmc_gpio_init(pdata);
1826 if (ret)
1827 goto err;
1828
Denis Karpov70a33412009-09-22 16:44:59 -07001829 mmc = mmc_alloc_host(sizeof(struct omap_hsmmc_host), &pdev->dev);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001830 if (!mmc) {
1831 ret = -ENOMEM;
Adrian Hunterdb0fefc2010-02-15 10:03:34 -08001832 goto err_alloc;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001833 }
1834
1835 host = mmc_priv(mmc);
1836 host->mmc = mmc;
1837 host->pdata = pdata;
1838 host->dev = &pdev->dev;
1839 host->use_dma = 1;
1840 host->dev->dma_mask = &pdata->dma_mask;
1841 host->dma_ch = -1;
1842 host->irq = irq;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001843 host->slot_id = 0;
Balaji T Kfc307df2012-04-02 12:26:47 +05301844 host->mapbase = res->start + pdata->reg_offset;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001845 host->base = ioremap(host->mapbase, SZ_4K);
Adrian Hunter6da20c82010-02-15 10:03:34 -08001846 host->power_mode = MMC_POWER_OFF;
Per Forlin9782aff2011-07-01 18:55:23 +02001847 host->next_data.cookie = 1;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001848
1849 platform_set_drvdata(pdev, host);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001850
Balaji T K7a8c2ce2011-07-01 22:09:34 +05301851 mmc->ops = &omap_hsmmc_ops;
Denis Karpovdd498ef2009-09-22 16:44:49 -07001852
Adrian Huntere0eb2422010-02-15 10:03:34 -08001853 /*
1854 * If regulator_disable can only put vcc_aux to sleep then there is
1855 * no off state.
1856 */
1857 if (mmc_slot(host).vcc_aux_disable_is_sleep)
1858 mmc_slot(host).no_off = 1;
1859
Daniel Mackd418ed82012-02-19 13:20:33 +01001860 mmc->f_min = OMAP_MMC_MIN_CLOCK;
1861
1862 if (pdata->max_freq > 0)
1863 mmc->f_max = pdata->max_freq;
1864 else
1865 mmc->f_max = OMAP_MMC_MAX_CLOCK;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001866
Adrian Hunter4dffd7a2009-09-22 16:44:58 -07001867 spin_lock_init(&host->irq_lock);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001868
Russell King6f7607c2009-01-28 10:22:50 +00001869 host->fclk = clk_get(&pdev->dev, "fck");
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001870 if (IS_ERR(host->fclk)) {
1871 ret = PTR_ERR(host->fclk);
1872 host->fclk = NULL;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001873 goto err1;
1874 }
1875
Paul Walmsley9b682562011-10-06 14:50:35 -06001876 if (host->pdata->controller_flags & OMAP_HSMMC_BROKEN_MULTIBLOCK_READ) {
1877 dev_info(&pdev->dev, "multiblock reads disabled due to 35xx erratum 2.1.1.128; MMC read performance may suffer\n");
1878 mmc->caps2 |= MMC_CAP2_NO_MULTI_READ;
1879 }
Denis Karpovdd498ef2009-09-22 16:44:49 -07001880
Balaji T Kfa4aa2d2011-07-01 22:09:35 +05301881 pm_runtime_enable(host->dev);
1882 pm_runtime_get_sync(host->dev);
1883 pm_runtime_set_autosuspend_delay(host->dev, MMC_AUTOSUSPEND_DELAY);
1884 pm_runtime_use_autosuspend(host->dev);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001885
Balaji T K92a3aeb2012-02-24 21:14:34 +05301886 omap_hsmmc_context_save(host);
1887
Adrian Hunter2bec0892009-09-22 16:45:02 -07001888 if (cpu_is_omap2430()) {
1889 host->dbclk = clk_get(&pdev->dev, "mmchsdb_fck");
1890 /*
1891 * MMC can still work without debounce clock.
1892 */
1893 if (IS_ERR(host->dbclk))
1894 dev_warn(mmc_dev(host->mmc),
1895 "Failed to get debounce clock\n");
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001896 else
Adrian Hunter2bec0892009-09-22 16:45:02 -07001897 host->got_dbclk = 1;
1898
1899 if (host->got_dbclk)
1900 if (clk_enable(host->dbclk) != 0)
1901 dev_dbg(mmc_dev(host->mmc), "Enabling debounce"
1902 " clk failed\n");
1903 }
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001904
Juha Yrjola0ccd76d2008-11-14 15:22:00 +02001905 /* Since we do only SG emulation, we can have as many segs
1906 * as we want. */
Martin K. Petersena36274e2010-09-10 01:33:59 -04001907 mmc->max_segs = 1024;
Juha Yrjola0ccd76d2008-11-14 15:22:00 +02001908
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001909 mmc->max_blk_size = 512; /* Block Length at max can be 1024 */
1910 mmc->max_blk_count = 0xFFFF; /* No. of Blocks is 16 bits */
1911 mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
1912 mmc->max_seg_size = mmc->max_req_size;
1913
Jarkko Lavinen13189e72009-09-22 16:44:53 -07001914 mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED |
Adrian Hunter93caf8e692010-08-11 14:17:48 -07001915 MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_ERASE;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001916
Sukumar Ghorai3a638332010-09-15 14:49:23 +00001917 mmc->caps |= mmc_slot(host).caps;
1918 if (mmc->caps & MMC_CAP_8_BIT_DATA)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001919 mmc->caps |= MMC_CAP_4_BIT_DATA;
1920
Denis Karpov191d1f12009-09-22 16:44:55 -07001921 if (mmc_slot(host).nonremovable)
Adrian Hunter23d99bb2009-09-22 16:44:48 -07001922 mmc->caps |= MMC_CAP_NONREMOVABLE;
1923
Eliad Peller6fdc75d2011-11-22 16:02:18 +02001924 mmc->pm_caps = mmc_slot(host).pm_caps;
1925
Denis Karpov70a33412009-09-22 16:44:59 -07001926 omap_hsmmc_conf_bus_power(host);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001927
Balaji T Kb7bf7732012-03-07 09:55:30 -05001928 res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
1929 if (!res) {
1930 dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n");
Grazvydas Ignotasf3e2f1d2009-01-03 10:36:13 +00001931 goto err_irq;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001932 }
Balaji T Kb7bf7732012-03-07 09:55:30 -05001933 host->dma_line_tx = res->start;
1934
1935 res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
1936 if (!res) {
1937 dev_err(mmc_dev(host->mmc), "cannot get DMA RX channel\n");
1938 goto err_irq;
1939 }
1940 host->dma_line_rx = res->start;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001941
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001942 /* Request IRQ for MMC operations */
Yong Zhangd9618e92011-09-22 16:59:04 +08001943 ret = request_irq(host->irq, omap_hsmmc_irq, 0,
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001944 mmc_hostname(mmc), host);
1945 if (ret) {
1946 dev_dbg(mmc_dev(host->mmc), "Unable to grab HSMMC IRQ\n");
1947 goto err_irq;
1948 }
1949
1950 if (pdata->init != NULL) {
1951 if (pdata->init(&pdev->dev) != 0) {
Denis Karpov70a33412009-09-22 16:44:59 -07001952 dev_dbg(mmc_dev(host->mmc),
1953 "Unable to configure MMC IRQs\n");
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001954 goto err_irq_cd_init;
1955 }
1956 }
Adrian Hunterdb0fefc2010-02-15 10:03:34 -08001957
Adrian Hunterb702b102010-02-15 10:03:35 -08001958 if (omap_hsmmc_have_reg() && !mmc_slot(host).set_power) {
Adrian Hunterdb0fefc2010-02-15 10:03:34 -08001959 ret = omap_hsmmc_reg_get(host);
1960 if (ret)
1961 goto err_reg;
1962 host->use_reg = 1;
1963 }
1964
David Brownellb583f262009-05-28 14:04:03 -07001965 mmc->ocr_avail = mmc_slot(host).ocr_mask;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001966
1967 /* Request IRQ for card detect */
Adrian Huntere1a55f52009-01-26 13:17:25 +02001968 if ((mmc_slot(host).card_detect_irq)) {
NeilBrown7efab4f2011-12-30 12:35:13 +11001969 ret = request_threaded_irq(mmc_slot(host).card_detect_irq,
1970 NULL,
1971 omap_hsmmc_detect,
1972 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
1973 mmc_hostname(mmc), host);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001974 if (ret) {
1975 dev_dbg(mmc_dev(host->mmc),
1976 "Unable to grab MMC CD IRQ\n");
1977 goto err_irq_cd;
1978 }
kishore kadiyala72f2e2c2010-09-24 17:13:20 +00001979 pdata->suspend = omap_hsmmc_suspend_cdirq;
1980 pdata->resume = omap_hsmmc_resume_cdirq;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001981 }
1982
Adrian Hunterb4175772010-05-26 14:42:06 -07001983 omap_hsmmc_disable_irq(host);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001984
Adrian Hunterb62f6222009-09-22 16:45:01 -07001985 omap_hsmmc_protect_card(host);
1986
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001987 mmc_add_host(mmc);
1988
Denis Karpov191d1f12009-09-22 16:44:55 -07001989 if (mmc_slot(host).name != NULL) {
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001990 ret = device_create_file(&mmc->class_dev, &dev_attr_slot_name);
1991 if (ret < 0)
1992 goto err_slot_name;
1993 }
Denis Karpov191d1f12009-09-22 16:44:55 -07001994 if (mmc_slot(host).card_detect_irq && mmc_slot(host).get_cover_state) {
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001995 ret = device_create_file(&mmc->class_dev,
1996 &dev_attr_cover_switch);
1997 if (ret < 0)
Adrian Hunterdb0fefc2010-02-15 10:03:34 -08001998 goto err_slot_name;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01001999 }
2000
Denis Karpov70a33412009-09-22 16:44:59 -07002001 omap_hsmmc_debugfs(mmc);
Balaji T Kfa4aa2d2011-07-01 22:09:35 +05302002 pm_runtime_mark_last_busy(host->dev);
2003 pm_runtime_put_autosuspend(host->dev);
Denis Karpovd900f712009-09-22 16:44:38 -07002004
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002005 return 0;
2006
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002007err_slot_name:
2008 mmc_remove_host(mmc);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002009 free_irq(mmc_slot(host).card_detect_irq, host);
Adrian Hunterdb0fefc2010-02-15 10:03:34 -08002010err_irq_cd:
2011 if (host->use_reg)
2012 omap_hsmmc_reg_put(host);
2013err_reg:
2014 if (host->pdata->cleanup)
2015 host->pdata->cleanup(&pdev->dev);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002016err_irq_cd_init:
2017 free_irq(host->irq, host);
2018err_irq:
Balaji T Kd59d77e2012-02-24 21:14:33 +05302019 pm_runtime_put_sync(host->dev);
Tony Lindgren37f61902012-03-08 23:41:35 -05002020 pm_runtime_disable(host->dev);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002021 clk_put(host->fclk);
Adrian Hunter2bec0892009-09-22 16:45:02 -07002022 if (host->got_dbclk) {
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002023 clk_disable(host->dbclk);
2024 clk_put(host->dbclk);
2025 }
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002026err1:
2027 iounmap(host->base);
Adrian Hunterdb0fefc2010-02-15 10:03:34 -08002028 platform_set_drvdata(pdev, NULL);
2029 mmc_free_host(mmc);
2030err_alloc:
2031 omap_hsmmc_gpio_free(pdata);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002032err:
Chris Ball984b2032011-03-22 16:34:42 -07002033 release_mem_region(res->start, resource_size(res));
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002034 return ret;
2035}
2036
Felipe Balbiefa25fd2012-03-14 11:18:28 +02002037static int __devexit omap_hsmmc_remove(struct platform_device *pdev)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002038{
Denis Karpov70a33412009-09-22 16:44:59 -07002039 struct omap_hsmmc_host *host = platform_get_drvdata(pdev);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002040 struct resource *res;
2041
Felipe Balbi927ce942012-03-14 11:18:27 +02002042 pm_runtime_get_sync(host->dev);
2043 mmc_remove_host(host->mmc);
2044 if (host->use_reg)
2045 omap_hsmmc_reg_put(host);
2046 if (host->pdata->cleanup)
2047 host->pdata->cleanup(&pdev->dev);
2048 free_irq(host->irq, host);
2049 if (mmc_slot(host).card_detect_irq)
2050 free_irq(mmc_slot(host).card_detect_irq, host);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002051
Felipe Balbi927ce942012-03-14 11:18:27 +02002052 pm_runtime_put_sync(host->dev);
2053 pm_runtime_disable(host->dev);
2054 clk_put(host->fclk);
2055 if (host->got_dbclk) {
2056 clk_disable(host->dbclk);
2057 clk_put(host->dbclk);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002058 }
2059
Felipe Balbi927ce942012-03-14 11:18:27 +02002060 mmc_free_host(host->mmc);
2061 iounmap(host->base);
2062 omap_hsmmc_gpio_free(pdev->dev.platform_data);
2063
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002064 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2065 if (res)
Chris Ball984b2032011-03-22 16:34:42 -07002066 release_mem_region(res->start, resource_size(res));
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002067 platform_set_drvdata(pdev, NULL);
2068
2069 return 0;
2070}
2071
2072#ifdef CONFIG_PM
Kevin Hilmana791daa2010-05-26 14:42:07 -07002073static int omap_hsmmc_suspend(struct device *dev)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002074{
2075 int ret = 0;
Felipe Balbi927ce942012-03-14 11:18:27 +02002076 struct omap_hsmmc_host *host = dev_get_drvdata(dev);
2077
2078 if (!host)
2079 return 0;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002080
2081 if (host && host->suspended)
2082 return 0;
2083
Felipe Balbi927ce942012-03-14 11:18:27 +02002084 pm_runtime_get_sync(host->dev);
2085 host->suspended = 1;
2086 if (host->pdata->suspend) {
2087 ret = host->pdata->suspend(dev, host->slot_id);
Eliad Peller31f9d462011-11-22 16:02:17 +02002088 if (ret) {
Felipe Balbi927ce942012-03-14 11:18:27 +02002089 dev_dbg(dev, "Unable to handle MMC board"
2090 " level suspend\n");
Adrian Huntera6b22402009-09-22 16:44:45 -07002091 host->suspended = 0;
Felipe Balbi927ce942012-03-14 11:18:27 +02002092 return ret;
Adrian Huntera6b22402009-09-22 16:44:45 -07002093 }
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002094 }
Felipe Balbi927ce942012-03-14 11:18:27 +02002095 ret = mmc_suspend_host(host->mmc);
2096
2097 if (ret) {
2098 host->suspended = 0;
2099 if (host->pdata->resume) {
2100 ret = host->pdata->resume(dev, host->slot_id);
2101 if (ret)
2102 dev_dbg(dev, "Unmask interrupt failed\n");
2103 }
2104 goto err;
2105 }
2106
2107 if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) {
2108 omap_hsmmc_disable_irq(host);
2109 OMAP_HSMMC_WRITE(host->base, HCTL,
2110 OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP);
2111 }
2112
2113 if (host->got_dbclk)
2114 clk_disable(host->dbclk);
Eliad Peller31f9d462011-11-22 16:02:17 +02002115err:
2116 pm_runtime_put_sync(host->dev);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002117 return ret;
2118}
2119
2120/* Routine to resume the MMC device */
Kevin Hilmana791daa2010-05-26 14:42:07 -07002121static int omap_hsmmc_resume(struct device *dev)
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002122{
2123 int ret = 0;
Felipe Balbi927ce942012-03-14 11:18:27 +02002124 struct omap_hsmmc_host *host = dev_get_drvdata(dev);
2125
2126 if (!host)
2127 return 0;
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002128
2129 if (host && !host->suspended)
2130 return 0;
2131
Felipe Balbi927ce942012-03-14 11:18:27 +02002132 pm_runtime_get_sync(host->dev);
Denis Karpov11dd62a2009-09-22 16:44:43 -07002133
Felipe Balbi927ce942012-03-14 11:18:27 +02002134 if (host->got_dbclk)
2135 clk_enable(host->dbclk);
Adrian Hunter2bec0892009-09-22 16:45:02 -07002136
Felipe Balbi927ce942012-03-14 11:18:27 +02002137 if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER))
2138 omap_hsmmc_conf_bus_power(host);
Kim Kyuwon1b331e62009-02-20 13:10:08 +01002139
Felipe Balbi927ce942012-03-14 11:18:27 +02002140 if (host->pdata->resume) {
2141 ret = host->pdata->resume(dev, host->slot_id);
2142 if (ret)
2143 dev_dbg(dev, "Unmask interrupt failed\n");
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002144 }
2145
Felipe Balbi927ce942012-03-14 11:18:27 +02002146 omap_hsmmc_protect_card(host);
2147
2148 /* Notify the core to resume the host */
2149 ret = mmc_resume_host(host->mmc);
2150 if (ret == 0)
2151 host->suspended = 0;
2152
2153 pm_runtime_mark_last_busy(host->dev);
2154 pm_runtime_put_autosuspend(host->dev);
2155
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002156 return ret;
2157
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002158}
2159
2160#else
Denis Karpov70a33412009-09-22 16:44:59 -07002161#define omap_hsmmc_suspend NULL
2162#define omap_hsmmc_resume NULL
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002163#endif
2164
Balaji T Kfa4aa2d2011-07-01 22:09:35 +05302165static int omap_hsmmc_runtime_suspend(struct device *dev)
2166{
2167 struct omap_hsmmc_host *host;
2168
2169 host = platform_get_drvdata(to_platform_device(dev));
2170 omap_hsmmc_context_save(host);
Felipe Balbi927ce942012-03-14 11:18:27 +02002171 dev_dbg(dev, "disabled\n");
Balaji T Kfa4aa2d2011-07-01 22:09:35 +05302172
2173 return 0;
2174}
2175
2176static int omap_hsmmc_runtime_resume(struct device *dev)
2177{
2178 struct omap_hsmmc_host *host;
2179
2180 host = platform_get_drvdata(to_platform_device(dev));
2181 omap_hsmmc_context_restore(host);
Felipe Balbi927ce942012-03-14 11:18:27 +02002182 dev_dbg(dev, "enabled\n");
Balaji T Kfa4aa2d2011-07-01 22:09:35 +05302183
2184 return 0;
2185}
2186
Kevin Hilmana791daa2010-05-26 14:42:07 -07002187static struct dev_pm_ops omap_hsmmc_dev_pm_ops = {
Denis Karpov70a33412009-09-22 16:44:59 -07002188 .suspend = omap_hsmmc_suspend,
2189 .resume = omap_hsmmc_resume,
Balaji T Kfa4aa2d2011-07-01 22:09:35 +05302190 .runtime_suspend = omap_hsmmc_runtime_suspend,
2191 .runtime_resume = omap_hsmmc_runtime_resume,
Kevin Hilmana791daa2010-05-26 14:42:07 -07002192};
2193
2194static struct platform_driver omap_hsmmc_driver = {
Felipe Balbiefa25fd2012-03-14 11:18:28 +02002195 .probe = omap_hsmmc_probe,
2196 .remove = __devexit_p(omap_hsmmc_remove),
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002197 .driver = {
2198 .name = DRIVER_NAME,
2199 .owner = THIS_MODULE,
Kevin Hilmana791daa2010-05-26 14:42:07 -07002200 .pm = &omap_hsmmc_dev_pm_ops,
Rajendra Nayak46856a62012-03-12 20:32:37 +05302201 .of_match_table = of_match_ptr(omap_mmc_of_match),
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002202 },
2203};
2204
Felipe Balbib7964502012-03-14 11:18:32 +02002205module_platform_driver(omap_hsmmc_driver);
Madhusudhan Chikkaturea45c6cb2009-01-23 01:05:23 +01002206MODULE_DESCRIPTION("OMAP High Speed Multimedia Card driver");
2207MODULE_LICENSE("GPL");
2208MODULE_ALIAS("platform:" DRIVER_NAME);
2209MODULE_AUTHOR("Texas Instruments Inc");