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Commit | Line | Data |
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a45c6cb8 MC |
1 | /* |
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> | |
ac330f44 | 20 | #include <linux/kernel.h> |
d900f712 | 21 | #include <linux/debugfs.h> |
c5c98927 | 22 | #include <linux/dmaengine.h> |
d900f712 | 23 | #include <linux/seq_file.h> |
031cd037 | 24 | #include <linux/sizes.h> |
a45c6cb8 MC |
25 | #include <linux/interrupt.h> |
26 | #include <linux/delay.h> | |
27 | #include <linux/dma-mapping.h> | |
28 | #include <linux/platform_device.h> | |
a45c6cb8 MC |
29 | #include <linux/timer.h> |
30 | #include <linux/clk.h> | |
46856a68 | 31 | #include <linux/of.h> |
2cd3a2a5 | 32 | #include <linux/of_irq.h> |
46856a68 RN |
33 | #include <linux/of_gpio.h> |
34 | #include <linux/of_device.h> | |
ee526d51 | 35 | #include <linux/omap-dmaengine.h> |
a45c6cb8 | 36 | #include <linux/mmc/host.h> |
13189e78 | 37 | #include <linux/mmc/core.h> |
93caf8e6 | 38 | #include <linux/mmc/mmc.h> |
a45c6cb8 | 39 | #include <linux/io.h> |
2cd3a2a5 | 40 | #include <linux/irq.h> |
db0fefc5 AH |
41 | #include <linux/gpio.h> |
42 | #include <linux/regulator/consumer.h> | |
46b76035 | 43 | #include <linux/pinctrl/consumer.h> |
fa4aa2d4 | 44 | #include <linux/pm_runtime.h> |
55143438 | 45 | #include <linux/platform_data/hsmmc-omap.h> |
a45c6cb8 MC |
46 | |
47 | /* OMAP HSMMC Host Controller Registers */ | |
11dd62a7 | 48 | #define OMAP_HSMMC_SYSSTATUS 0x0014 |
a45c6cb8 | 49 | #define OMAP_HSMMC_CON 0x002C |
a2e77152 | 50 | #define OMAP_HSMMC_SDMASA 0x0100 |
a45c6cb8 MC |
51 | #define OMAP_HSMMC_BLK 0x0104 |
52 | #define OMAP_HSMMC_ARG 0x0108 | |
53 | #define OMAP_HSMMC_CMD 0x010C | |
54 | #define OMAP_HSMMC_RSP10 0x0110 | |
55 | #define OMAP_HSMMC_RSP32 0x0114 | |
56 | #define OMAP_HSMMC_RSP54 0x0118 | |
57 | #define OMAP_HSMMC_RSP76 0x011C | |
58 | #define OMAP_HSMMC_DATA 0x0120 | |
bb0635f0 | 59 | #define OMAP_HSMMC_PSTATE 0x0124 |
a45c6cb8 MC |
60 | #define OMAP_HSMMC_HCTL 0x0128 |
61 | #define OMAP_HSMMC_SYSCTL 0x012C | |
62 | #define OMAP_HSMMC_STAT 0x0130 | |
63 | #define OMAP_HSMMC_IE 0x0134 | |
64 | #define OMAP_HSMMC_ISE 0x0138 | |
a2e77152 | 65 | #define OMAP_HSMMC_AC12 0x013C |
a45c6cb8 MC |
66 | #define OMAP_HSMMC_CAPA 0x0140 |
67 | ||
68 | #define VS18 (1 << 26) | |
69 | #define VS30 (1 << 25) | |
cd587096 | 70 | #define HSS (1 << 21) |
a45c6cb8 MC |
71 | #define SDVS18 (0x5 << 9) |
72 | #define SDVS30 (0x6 << 9) | |
eb250826 | 73 | #define SDVS33 (0x7 << 9) |
1b331e69 | 74 | #define SDVS_MASK 0x00000E00 |
a45c6cb8 MC |
75 | #define SDVSCLR 0xFFFFF1FF |
76 | #define SDVSDET 0x00000400 | |
77 | #define AUTOIDLE 0x1 | |
78 | #define SDBP (1 << 8) | |
79 | #define DTO 0xe | |
80 | #define ICE 0x1 | |
81 | #define ICS 0x2 | |
82 | #define CEN (1 << 2) | |
ed164182 | 83 | #define CLKD_MAX 0x3FF /* max clock divisor: 1023 */ |
a45c6cb8 MC |
84 | #define CLKD_MASK 0x0000FFC0 |
85 | #define CLKD_SHIFT 6 | |
86 | #define DTO_MASK 0x000F0000 | |
87 | #define DTO_SHIFT 16 | |
a45c6cb8 | 88 | #define INIT_STREAM (1 << 1) |
a2e77152 | 89 | #define ACEN_ACMD23 (2 << 2) |
a45c6cb8 MC |
90 | #define DP_SELECT (1 << 21) |
91 | #define DDIR (1 << 4) | |
a7e96879 | 92 | #define DMAE 0x1 |
a45c6cb8 MC |
93 | #define MSBS (1 << 5) |
94 | #define BCE (1 << 1) | |
95 | #define FOUR_BIT (1 << 1) | |
cd587096 | 96 | #define HSPE (1 << 2) |
5a52b08b | 97 | #define IWE (1 << 24) |
03b5d924 | 98 | #define DDR (1 << 19) |
5a52b08b B |
99 | #define CLKEXTFREE (1 << 16) |
100 | #define CTPL (1 << 11) | |
73153010 | 101 | #define DW8 (1 << 5) |
a45c6cb8 | 102 | #define OD 0x1 |
a45c6cb8 MC |
103 | #define STAT_CLEAR 0xFFFFFFFF |
104 | #define INIT_STREAM_CMD 0x00000000 | |
105 | #define DUAL_VOLT_OCR_BIT 7 | |
106 | #define SRC (1 << 25) | |
107 | #define SRD (1 << 26) | |
11dd62a7 | 108 | #define SOFTRESET (1 << 1) |
a45c6cb8 | 109 | |
f945901f AF |
110 | /* PSTATE */ |
111 | #define DLEV_DAT(x) (1 << (20 + (x))) | |
112 | ||
a7e96879 V |
113 | /* Interrupt masks for IE and ISE register */ |
114 | #define CC_EN (1 << 0) | |
115 | #define TC_EN (1 << 1) | |
116 | #define BWR_EN (1 << 4) | |
117 | #define BRR_EN (1 << 5) | |
2cd3a2a5 | 118 | #define CIRQ_EN (1 << 8) |
a7e96879 V |
119 | #define ERR_EN (1 << 15) |
120 | #define CTO_EN (1 << 16) | |
121 | #define CCRC_EN (1 << 17) | |
122 | #define CEB_EN (1 << 18) | |
123 | #define CIE_EN (1 << 19) | |
124 | #define DTO_EN (1 << 20) | |
125 | #define DCRC_EN (1 << 21) | |
126 | #define DEB_EN (1 << 22) | |
a2e77152 | 127 | #define ACE_EN (1 << 24) |
a7e96879 V |
128 | #define CERR_EN (1 << 28) |
129 | #define BADA_EN (1 << 29) | |
130 | ||
a2e77152 | 131 | #define INT_EN_MASK (BADA_EN | CERR_EN | ACE_EN | DEB_EN | DCRC_EN |\ |
a7e96879 V |
132 | DTO_EN | CIE_EN | CEB_EN | CCRC_EN | CTO_EN | \ |
133 | BRR_EN | BWR_EN | TC_EN | CC_EN) | |
134 | ||
a2e77152 B |
135 | #define CNI (1 << 7) |
136 | #define ACIE (1 << 4) | |
137 | #define ACEB (1 << 3) | |
138 | #define ACCE (1 << 2) | |
139 | #define ACTO (1 << 1) | |
140 | #define ACNE (1 << 0) | |
141 | ||
fa4aa2d4 | 142 | #define MMC_AUTOSUSPEND_DELAY 100 |
1e881786 JM |
143 | #define MMC_TIMEOUT_MS 20 /* 20 mSec */ |
144 | #define MMC_TIMEOUT_US 20000 /* 20000 micro Sec */ | |
6b206efe AS |
145 | #define OMAP_MMC_MIN_CLOCK 400000 |
146 | #define OMAP_MMC_MAX_CLOCK 52000000 | |
0005ae73 | 147 | #define DRIVER_NAME "omap_hsmmc" |
a45c6cb8 | 148 | |
e99448ff B |
149 | #define VDD_1V8 1800000 /* 180000 uV */ |
150 | #define VDD_3V0 3000000 /* 300000 uV */ | |
151 | #define VDD_165_195 (ffs(MMC_VDD_165_195) - 1) | |
152 | ||
a45c6cb8 MC |
153 | /* |
154 | * One controller can have multiple slots, like on some omap boards using | |
155 | * omap.c controller driver. Luckily this is not currently done on any known | |
156 | * omap_hsmmc.c device. | |
157 | */ | |
326119c9 | 158 | #define mmc_pdata(host) host->pdata |
a45c6cb8 MC |
159 | |
160 | /* | |
161 | * MMC Host controller read/write API's | |
162 | */ | |
163 | #define OMAP_HSMMC_READ(base, reg) \ | |
164 | __raw_readl((base) + OMAP_HSMMC_##reg) | |
165 | ||
166 | #define OMAP_HSMMC_WRITE(base, reg, val) \ | |
167 | __raw_writel((val), (base) + OMAP_HSMMC_##reg) | |
168 | ||
9782aff8 PF |
169 | struct omap_hsmmc_next { |
170 | unsigned int dma_len; | |
171 | s32 cookie; | |
172 | }; | |
173 | ||
70a3341a | 174 | struct omap_hsmmc_host { |
a45c6cb8 MC |
175 | struct device *dev; |
176 | struct mmc_host *mmc; | |
177 | struct mmc_request *mrq; | |
178 | struct mmc_command *cmd; | |
179 | struct mmc_data *data; | |
180 | struct clk *fclk; | |
a45c6cb8 | 181 | struct clk *dbclk; |
db0fefc5 AH |
182 | /* |
183 | * vcc == configured supply | |
184 | * vcc_aux == optional | |
185 | * - MMC1, supply for DAT4..DAT7 | |
186 | * - MMC2/MMC2, external level shifter voltage supply, for | |
187 | * chip (SDIO, eMMC, etc) or transceiver (MMC2 only) | |
188 | */ | |
189 | struct regulator *vcc; | |
190 | struct regulator *vcc_aux; | |
e99448ff B |
191 | struct regulator *pbias; |
192 | bool pbias_enabled; | |
a45c6cb8 MC |
193 | void __iomem *base; |
194 | resource_size_t mapbase; | |
4dffd7a2 | 195 | spinlock_t irq_lock; /* Prevent races with irq handler */ |
a45c6cb8 | 196 | unsigned int dma_len; |
0ccd76d4 | 197 | unsigned int dma_sg_idx; |
a45c6cb8 | 198 | unsigned char bus_mode; |
a3621465 | 199 | unsigned char power_mode; |
a45c6cb8 | 200 | int suspended; |
0a82e06e TL |
201 | u32 con; |
202 | u32 hctl; | |
203 | u32 sysctl; | |
204 | u32 capa; | |
a45c6cb8 | 205 | int irq; |
2cd3a2a5 | 206 | int wake_irq; |
a45c6cb8 | 207 | int use_dma, dma_ch; |
c5c98927 RK |
208 | struct dma_chan *tx_chan; |
209 | struct dma_chan *rx_chan; | |
4a694dc9 | 210 | int response_busy; |
11dd62a7 | 211 | int context_loss; |
b62f6228 AH |
212 | int protect_card; |
213 | int reqs_blocked; | |
db0fefc5 | 214 | int use_reg; |
b417577d | 215 | int req_in_progress; |
6e3076c2 | 216 | unsigned long clk_rate; |
a2e77152 | 217 | unsigned int flags; |
2cd3a2a5 AF |
218 | #define AUTO_CMD23 (1 << 0) /* Auto CMD23 support */ |
219 | #define HSMMC_SDIO_IRQ_ENABLED (1 << 1) /* SDIO irq enabled */ | |
220 | #define HSMMC_WAKE_IRQ_ENABLED (1 << 2) | |
9782aff8 | 221 | struct omap_hsmmc_next next_data; |
55143438 | 222 | struct omap_hsmmc_platform_data *pdata; |
b5cd43f0 AF |
223 | |
224 | /* To handle board related suspend/resume functionality for MMC */ | |
80412ca8 AF |
225 | int (*suspend)(struct device *dev); |
226 | int (*resume)(struct device *dev); | |
b5cd43f0 AF |
227 | |
228 | /* return MMC cover switch state, can be NULL if not supported. | |
229 | * | |
230 | * possible return values: | |
231 | * 0 - closed | |
232 | * 1 - open | |
233 | */ | |
80412ca8 | 234 | int (*get_cover_state)(struct device *dev); |
b5cd43f0 AF |
235 | |
236 | /* Card detection IRQs */ | |
237 | int card_detect_irq; | |
238 | ||
80412ca8 AF |
239 | int (*card_detect)(struct device *dev); |
240 | int (*get_ro)(struct device *dev); | |
b5cd43f0 | 241 | |
a45c6cb8 MC |
242 | }; |
243 | ||
59445b10 NM |
244 | struct omap_mmc_of_data { |
245 | u32 reg_offset; | |
246 | u8 controller_flags; | |
247 | }; | |
248 | ||
bf129e1c B |
249 | static void omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host); |
250 | ||
80412ca8 | 251 | static int omap_hsmmc_card_detect(struct device *dev) |
db0fefc5 | 252 | { |
9ea28ecb | 253 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); |
55143438 | 254 | struct omap_hsmmc_platform_data *mmc = host->pdata; |
db0fefc5 AH |
255 | |
256 | /* NOTE: assumes card detect signal is active-low */ | |
326119c9 | 257 | return !gpio_get_value_cansleep(mmc->switch_pin); |
db0fefc5 AH |
258 | } |
259 | ||
80412ca8 | 260 | static int omap_hsmmc_get_wp(struct device *dev) |
db0fefc5 | 261 | { |
9ea28ecb | 262 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); |
55143438 | 263 | struct omap_hsmmc_platform_data *mmc = host->pdata; |
db0fefc5 AH |
264 | |
265 | /* NOTE: assumes write protect signal is active-high */ | |
326119c9 | 266 | return gpio_get_value_cansleep(mmc->gpio_wp); |
db0fefc5 AH |
267 | } |
268 | ||
80412ca8 | 269 | static int omap_hsmmc_get_cover_state(struct device *dev) |
db0fefc5 | 270 | { |
9ea28ecb | 271 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); |
55143438 | 272 | struct omap_hsmmc_platform_data *mmc = host->pdata; |
db0fefc5 AH |
273 | |
274 | /* NOTE: assumes card detect signal is active-low */ | |
326119c9 | 275 | return !gpio_get_value_cansleep(mmc->switch_pin); |
db0fefc5 AH |
276 | } |
277 | ||
278 | #ifdef CONFIG_PM | |
279 | ||
80412ca8 | 280 | static int omap_hsmmc_suspend_cdirq(struct device *dev) |
db0fefc5 | 281 | { |
9ea28ecb | 282 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); |
db0fefc5 | 283 | |
b5cd43f0 | 284 | disable_irq(host->card_detect_irq); |
db0fefc5 AH |
285 | return 0; |
286 | } | |
287 | ||
80412ca8 | 288 | static int omap_hsmmc_resume_cdirq(struct device *dev) |
db0fefc5 | 289 | { |
9ea28ecb | 290 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); |
db0fefc5 | 291 | |
b5cd43f0 | 292 | enable_irq(host->card_detect_irq); |
db0fefc5 AH |
293 | return 0; |
294 | } | |
295 | ||
296 | #else | |
297 | ||
298 | #define omap_hsmmc_suspend_cdirq NULL | |
299 | #define omap_hsmmc_resume_cdirq NULL | |
300 | ||
301 | #endif | |
302 | ||
b702b106 AH |
303 | #ifdef CONFIG_REGULATOR |
304 | ||
80412ca8 | 305 | static int omap_hsmmc_set_power(struct device *dev, int power_on, int vdd) |
db0fefc5 AH |
306 | { |
307 | struct omap_hsmmc_host *host = | |
308 | platform_get_drvdata(to_platform_device(dev)); | |
309 | int ret = 0; | |
310 | ||
311 | /* | |
312 | * If we don't see a Vcc regulator, assume it's a fixed | |
313 | * voltage always-on regulator. | |
314 | */ | |
315 | if (!host->vcc) | |
316 | return 0; | |
317 | ||
326119c9 | 318 | if (mmc_pdata(host)->before_set_reg) |
80412ca8 | 319 | mmc_pdata(host)->before_set_reg(dev, power_on, vdd); |
db0fefc5 | 320 | |
e99448ff B |
321 | if (host->pbias) { |
322 | if (host->pbias_enabled == 1) { | |
323 | ret = regulator_disable(host->pbias); | |
324 | if (!ret) | |
325 | host->pbias_enabled = 0; | |
326 | } | |
327 | regulator_set_voltage(host->pbias, VDD_3V0, VDD_3V0); | |
328 | } | |
329 | ||
db0fefc5 AH |
330 | /* |
331 | * Assume Vcc regulator is used only to power the card ... OMAP | |
332 | * VDDS is used to power the pins, optionally with a transceiver to | |
333 | * support cards using voltages other than VDDS (1.8V nominal). When a | |
334 | * transceiver is used, DAT3..7 are muxed as transceiver control pins. | |
335 | * | |
336 | * In some cases this regulator won't support enable/disable; | |
337 | * e.g. it's a fixed rail for a WLAN chip. | |
338 | * | |
339 | * In other cases vcc_aux switches interface power. Example, for | |
340 | * eMMC cards it represents VccQ. Sometimes transceivers or SDIO | |
341 | * chips/cards need an interface voltage rail too. | |
342 | */ | |
343 | if (power_on) { | |
987fd49b B |
344 | if (host->vcc) |
345 | ret = mmc_regulator_set_ocr(host->mmc, host->vcc, vdd); | |
db0fefc5 AH |
346 | /* Enable interface voltage rail, if needed */ |
347 | if (ret == 0 && host->vcc_aux) { | |
348 | ret = regulator_enable(host->vcc_aux); | |
987fd49b | 349 | if (ret < 0 && host->vcc) |
99fc5131 LW |
350 | ret = mmc_regulator_set_ocr(host->mmc, |
351 | host->vcc, 0); | |
db0fefc5 AH |
352 | } |
353 | } else { | |
99fc5131 | 354 | /* Shut down the rail */ |
6da20c89 AH |
355 | if (host->vcc_aux) |
356 | ret = regulator_disable(host->vcc_aux); | |
987fd49b | 357 | if (host->vcc) { |
99fc5131 LW |
358 | /* Then proceed to shut down the local regulator */ |
359 | ret = mmc_regulator_set_ocr(host->mmc, | |
360 | host->vcc, 0); | |
361 | } | |
db0fefc5 AH |
362 | } |
363 | ||
e99448ff B |
364 | if (host->pbias) { |
365 | if (vdd <= VDD_165_195) | |
366 | ret = regulator_set_voltage(host->pbias, VDD_1V8, | |
367 | VDD_1V8); | |
368 | else | |
369 | ret = regulator_set_voltage(host->pbias, VDD_3V0, | |
370 | VDD_3V0); | |
371 | if (ret < 0) | |
372 | goto error_set_power; | |
373 | ||
374 | if (host->pbias_enabled == 0) { | |
375 | ret = regulator_enable(host->pbias); | |
376 | if (!ret) | |
377 | host->pbias_enabled = 1; | |
378 | } | |
379 | } | |
380 | ||
326119c9 | 381 | if (mmc_pdata(host)->after_set_reg) |
80412ca8 | 382 | mmc_pdata(host)->after_set_reg(dev, power_on, vdd); |
db0fefc5 | 383 | |
e99448ff | 384 | error_set_power: |
db0fefc5 AH |
385 | return ret; |
386 | } | |
387 | ||
db0fefc5 AH |
388 | static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) |
389 | { | |
390 | struct regulator *reg; | |
64be9782 | 391 | int ocr_value = 0; |
db0fefc5 | 392 | |
f2ddc1da | 393 | reg = devm_regulator_get(host->dev, "vmmc"); |
db0fefc5 | 394 | if (IS_ERR(reg)) { |
987fd49b B |
395 | dev_err(host->dev, "unable to get vmmc regulator %ld\n", |
396 | PTR_ERR(reg)); | |
1fdc90fb | 397 | return PTR_ERR(reg); |
db0fefc5 AH |
398 | } else { |
399 | host->vcc = reg; | |
64be9782 | 400 | ocr_value = mmc_regulator_get_ocrmask(reg); |
326119c9 AF |
401 | if (!mmc_pdata(host)->ocr_mask) { |
402 | mmc_pdata(host)->ocr_mask = ocr_value; | |
64be9782 | 403 | } else { |
326119c9 | 404 | if (!(mmc_pdata(host)->ocr_mask & ocr_value)) { |
2cecdf00 | 405 | dev_err(host->dev, "ocrmask %x is not supported\n", |
326119c9 AF |
406 | mmc_pdata(host)->ocr_mask); |
407 | mmc_pdata(host)->ocr_mask = 0; | |
64be9782 | 408 | return -EINVAL; |
409 | } | |
410 | } | |
987fd49b | 411 | } |
326119c9 | 412 | mmc_pdata(host)->set_power = omap_hsmmc_set_power; |
db0fefc5 | 413 | |
987fd49b B |
414 | /* Allow an aux regulator */ |
415 | reg = devm_regulator_get_optional(host->dev, "vmmc_aux"); | |
416 | host->vcc_aux = IS_ERR(reg) ? NULL : reg; | |
417 | ||
e99448ff B |
418 | reg = devm_regulator_get_optional(host->dev, "pbias"); |
419 | host->pbias = IS_ERR(reg) ? NULL : reg; | |
420 | ||
987fd49b | 421 | /* For eMMC do not power off when not in sleep state */ |
326119c9 | 422 | if (mmc_pdata(host)->no_regulator_off_init) |
987fd49b B |
423 | return 0; |
424 | /* | |
425 | * To disable boot_on regulator, enable regulator | |
426 | * to increase usecount and then disable it. | |
427 | */ | |
428 | if ((host->vcc && regulator_is_enabled(host->vcc) > 0) || | |
429 | (host->vcc_aux && regulator_is_enabled(host->vcc_aux))) { | |
326119c9 | 430 | int vdd = ffs(mmc_pdata(host)->ocr_mask) - 1; |
987fd49b | 431 | |
80412ca8 AF |
432 | mmc_pdata(host)->set_power(host->dev, 1, vdd); |
433 | mmc_pdata(host)->set_power(host->dev, 0, 0); | |
db0fefc5 AH |
434 | } |
435 | ||
436 | return 0; | |
db0fefc5 AH |
437 | } |
438 | ||
439 | static void omap_hsmmc_reg_put(struct omap_hsmmc_host *host) | |
440 | { | |
326119c9 | 441 | mmc_pdata(host)->set_power = NULL; |
db0fefc5 AH |
442 | } |
443 | ||
b702b106 AH |
444 | static inline int omap_hsmmc_have_reg(void) |
445 | { | |
446 | return 1; | |
447 | } | |
448 | ||
449 | #else | |
450 | ||
451 | static inline int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) | |
452 | { | |
453 | return -EINVAL; | |
454 | } | |
455 | ||
456 | static inline void omap_hsmmc_reg_put(struct omap_hsmmc_host *host) | |
457 | { | |
458 | } | |
459 | ||
460 | static inline int omap_hsmmc_have_reg(void) | |
461 | { | |
462 | return 0; | |
463 | } | |
464 | ||
465 | #endif | |
466 | ||
1e363e3b AF |
467 | static int omap_hsmmc_gpio_init(struct omap_hsmmc_host *host, |
468 | struct omap_hsmmc_platform_data *pdata) | |
b702b106 AH |
469 | { |
470 | int ret; | |
471 | ||
326119c9 AF |
472 | if (gpio_is_valid(pdata->switch_pin)) { |
473 | if (pdata->cover) | |
b5cd43f0 AF |
474 | host->get_cover_state = |
475 | omap_hsmmc_get_cover_state; | |
b702b106 | 476 | else |
b5cd43f0 AF |
477 | host->card_detect = omap_hsmmc_card_detect; |
478 | host->card_detect_irq = | |
326119c9 AF |
479 | gpio_to_irq(pdata->switch_pin); |
480 | ret = gpio_request(pdata->switch_pin, "mmc_cd"); | |
b702b106 AH |
481 | if (ret) |
482 | return ret; | |
326119c9 | 483 | ret = gpio_direction_input(pdata->switch_pin); |
b702b106 AH |
484 | if (ret) |
485 | goto err_free_sp; | |
326119c9 AF |
486 | } else { |
487 | pdata->switch_pin = -EINVAL; | |
488 | } | |
b702b106 | 489 | |
326119c9 | 490 | if (gpio_is_valid(pdata->gpio_wp)) { |
b5cd43f0 | 491 | host->get_ro = omap_hsmmc_get_wp; |
326119c9 | 492 | ret = gpio_request(pdata->gpio_wp, "mmc_wp"); |
b702b106 AH |
493 | if (ret) |
494 | goto err_free_cd; | |
326119c9 | 495 | ret = gpio_direction_input(pdata->gpio_wp); |
b702b106 AH |
496 | if (ret) |
497 | goto err_free_wp; | |
326119c9 AF |
498 | } else { |
499 | pdata->gpio_wp = -EINVAL; | |
500 | } | |
b702b106 AH |
501 | |
502 | return 0; | |
503 | ||
504 | err_free_wp: | |
326119c9 | 505 | gpio_free(pdata->gpio_wp); |
b702b106 | 506 | err_free_cd: |
326119c9 | 507 | if (gpio_is_valid(pdata->switch_pin)) |
b702b106 | 508 | err_free_sp: |
326119c9 | 509 | gpio_free(pdata->switch_pin); |
b702b106 AH |
510 | return ret; |
511 | } | |
512 | ||
1e363e3b AF |
513 | static void omap_hsmmc_gpio_free(struct omap_hsmmc_host *host, |
514 | struct omap_hsmmc_platform_data *pdata) | |
b702b106 | 515 | { |
326119c9 AF |
516 | if (gpio_is_valid(pdata->gpio_wp)) |
517 | gpio_free(pdata->gpio_wp); | |
518 | if (gpio_is_valid(pdata->switch_pin)) | |
519 | gpio_free(pdata->switch_pin); | |
b702b106 AH |
520 | } |
521 | ||
e0c7f99b AS |
522 | /* |
523 | * Start clock to the card | |
524 | */ | |
525 | static void omap_hsmmc_start_clock(struct omap_hsmmc_host *host) | |
526 | { | |
527 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
528 | OMAP_HSMMC_READ(host->base, SYSCTL) | CEN); | |
529 | } | |
530 | ||
a45c6cb8 MC |
531 | /* |
532 | * Stop clock to the card | |
533 | */ | |
70a3341a | 534 | static void omap_hsmmc_stop_clock(struct omap_hsmmc_host *host) |
a45c6cb8 MC |
535 | { |
536 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
537 | OMAP_HSMMC_READ(host->base, SYSCTL) & ~CEN); | |
538 | if ((OMAP_HSMMC_READ(host->base, SYSCTL) & CEN) != 0x0) | |
7122bbb0 | 539 | dev_dbg(mmc_dev(host->mmc), "MMC Clock is not stopped\n"); |
a45c6cb8 MC |
540 | } |
541 | ||
93caf8e6 AH |
542 | static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host, |
543 | struct mmc_command *cmd) | |
b417577d | 544 | { |
2cd3a2a5 AF |
545 | u32 irq_mask = INT_EN_MASK; |
546 | unsigned long flags; | |
b417577d AH |
547 | |
548 | if (host->use_dma) | |
2cd3a2a5 | 549 | irq_mask &= ~(BRR_EN | BWR_EN); |
b417577d | 550 | |
93caf8e6 AH |
551 | /* Disable timeout for erases */ |
552 | if (cmd->opcode == MMC_ERASE) | |
a7e96879 | 553 | irq_mask &= ~DTO_EN; |
93caf8e6 | 554 | |
2cd3a2a5 | 555 | spin_lock_irqsave(&host->irq_lock, flags); |
b417577d AH |
556 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); |
557 | OMAP_HSMMC_WRITE(host->base, ISE, irq_mask); | |
2cd3a2a5 AF |
558 | |
559 | /* latch pending CIRQ, but don't signal MMC core */ | |
560 | if (host->flags & HSMMC_SDIO_IRQ_ENABLED) | |
561 | irq_mask |= CIRQ_EN; | |
b417577d | 562 | OMAP_HSMMC_WRITE(host->base, IE, irq_mask); |
2cd3a2a5 | 563 | spin_unlock_irqrestore(&host->irq_lock, flags); |
b417577d AH |
564 | } |
565 | ||
566 | static void omap_hsmmc_disable_irq(struct omap_hsmmc_host *host) | |
567 | { | |
2cd3a2a5 AF |
568 | u32 irq_mask = 0; |
569 | unsigned long flags; | |
570 | ||
571 | spin_lock_irqsave(&host->irq_lock, flags); | |
572 | /* no transfer running but need to keep cirq if enabled */ | |
573 | if (host->flags & HSMMC_SDIO_IRQ_ENABLED) | |
574 | irq_mask |= CIRQ_EN; | |
575 | OMAP_HSMMC_WRITE(host->base, ISE, irq_mask); | |
576 | OMAP_HSMMC_WRITE(host->base, IE, irq_mask); | |
b417577d | 577 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); |
2cd3a2a5 | 578 | spin_unlock_irqrestore(&host->irq_lock, flags); |
b417577d AH |
579 | } |
580 | ||
ac330f44 | 581 | /* Calculate divisor for the given clock frequency */ |
d83b6e03 | 582 | static u16 calc_divisor(struct omap_hsmmc_host *host, struct mmc_ios *ios) |
ac330f44 AS |
583 | { |
584 | u16 dsor = 0; | |
585 | ||
586 | if (ios->clock) { | |
d83b6e03 | 587 | dsor = DIV_ROUND_UP(clk_get_rate(host->fclk), ios->clock); |
ed164182 B |
588 | if (dsor > CLKD_MAX) |
589 | dsor = CLKD_MAX; | |
ac330f44 AS |
590 | } |
591 | ||
592 | return dsor; | |
593 | } | |
594 | ||
5934df2f AS |
595 | static void omap_hsmmc_set_clock(struct omap_hsmmc_host *host) |
596 | { | |
597 | struct mmc_ios *ios = &host->mmc->ios; | |
598 | unsigned long regval; | |
599 | unsigned long timeout; | |
cd587096 | 600 | unsigned long clkdiv; |
5934df2f | 601 | |
8986d31b | 602 | dev_vdbg(mmc_dev(host->mmc), "Set clock to %uHz\n", ios->clock); |
5934df2f AS |
603 | |
604 | omap_hsmmc_stop_clock(host); | |
605 | ||
606 | regval = OMAP_HSMMC_READ(host->base, SYSCTL); | |
607 | regval = regval & ~(CLKD_MASK | DTO_MASK); | |
cd587096 HG |
608 | clkdiv = calc_divisor(host, ios); |
609 | regval = regval | (clkdiv << 6) | (DTO << 16); | |
5934df2f AS |
610 | OMAP_HSMMC_WRITE(host->base, SYSCTL, regval); |
611 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
612 | OMAP_HSMMC_READ(host->base, SYSCTL) | ICE); | |
613 | ||
614 | /* Wait till the ICS bit is set */ | |
615 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
616 | while ((OMAP_HSMMC_READ(host->base, SYSCTL) & ICS) != ICS | |
617 | && time_before(jiffies, timeout)) | |
618 | cpu_relax(); | |
619 | ||
cd587096 HG |
620 | /* |
621 | * Enable High-Speed Support | |
622 | * Pre-Requisites | |
623 | * - Controller should support High-Speed-Enable Bit | |
624 | * - Controller should not be using DDR Mode | |
625 | * - Controller should advertise that it supports High Speed | |
626 | * in capabilities register | |
627 | * - MMC/SD clock coming out of controller > 25MHz | |
628 | */ | |
326119c9 | 629 | if ((mmc_pdata(host)->features & HSMMC_HAS_HSPE_SUPPORT) && |
5438ad95 | 630 | (ios->timing != MMC_TIMING_MMC_DDR52) && |
903101a8 | 631 | (ios->timing != MMC_TIMING_UHS_DDR50) && |
cd587096 HG |
632 | ((OMAP_HSMMC_READ(host->base, CAPA) & HSS) == HSS)) { |
633 | regval = OMAP_HSMMC_READ(host->base, HCTL); | |
634 | if (clkdiv && (clk_get_rate(host->fclk)/clkdiv) > 25000000) | |
635 | regval |= HSPE; | |
636 | else | |
637 | regval &= ~HSPE; | |
638 | ||
639 | OMAP_HSMMC_WRITE(host->base, HCTL, regval); | |
640 | } | |
641 | ||
5934df2f AS |
642 | omap_hsmmc_start_clock(host); |
643 | } | |
644 | ||
3796fb8a AS |
645 | static void omap_hsmmc_set_bus_width(struct omap_hsmmc_host *host) |
646 | { | |
647 | struct mmc_ios *ios = &host->mmc->ios; | |
648 | u32 con; | |
649 | ||
650 | con = OMAP_HSMMC_READ(host->base, CON); | |
903101a8 UH |
651 | if (ios->timing == MMC_TIMING_MMC_DDR52 || |
652 | ios->timing == MMC_TIMING_UHS_DDR50) | |
03b5d924 B |
653 | con |= DDR; /* configure in DDR mode */ |
654 | else | |
655 | con &= ~DDR; | |
3796fb8a AS |
656 | switch (ios->bus_width) { |
657 | case MMC_BUS_WIDTH_8: | |
658 | OMAP_HSMMC_WRITE(host->base, CON, con | DW8); | |
659 | break; | |
660 | case MMC_BUS_WIDTH_4: | |
661 | OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8); | |
662 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
663 | OMAP_HSMMC_READ(host->base, HCTL) | FOUR_BIT); | |
664 | break; | |
665 | case MMC_BUS_WIDTH_1: | |
666 | OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8); | |
667 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
668 | OMAP_HSMMC_READ(host->base, HCTL) & ~FOUR_BIT); | |
669 | break; | |
670 | } | |
671 | } | |
672 | ||
673 | static void omap_hsmmc_set_bus_mode(struct omap_hsmmc_host *host) | |
674 | { | |
675 | struct mmc_ios *ios = &host->mmc->ios; | |
676 | u32 con; | |
677 | ||
678 | con = OMAP_HSMMC_READ(host->base, CON); | |
679 | if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) | |
680 | OMAP_HSMMC_WRITE(host->base, CON, con | OD); | |
681 | else | |
682 | OMAP_HSMMC_WRITE(host->base, CON, con & ~OD); | |
683 | } | |
684 | ||
11dd62a7 DK |
685 | #ifdef CONFIG_PM |
686 | ||
687 | /* | |
688 | * Restore the MMC host context, if it was lost as result of a | |
689 | * power state change. | |
690 | */ | |
70a3341a | 691 | static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host) |
11dd62a7 DK |
692 | { |
693 | struct mmc_ios *ios = &host->mmc->ios; | |
3796fb8a | 694 | u32 hctl, capa; |
11dd62a7 DK |
695 | unsigned long timeout; |
696 | ||
0a82e06e TL |
697 | if (host->con == OMAP_HSMMC_READ(host->base, CON) && |
698 | host->hctl == OMAP_HSMMC_READ(host->base, HCTL) && | |
699 | host->sysctl == OMAP_HSMMC_READ(host->base, SYSCTL) && | |
700 | host->capa == OMAP_HSMMC_READ(host->base, CAPA)) | |
701 | return 0; | |
702 | ||
703 | host->context_loss++; | |
704 | ||
c2200efb | 705 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { |
11dd62a7 DK |
706 | if (host->power_mode != MMC_POWER_OFF && |
707 | (1 << ios->vdd) <= MMC_VDD_23_24) | |
708 | hctl = SDVS18; | |
709 | else | |
710 | hctl = SDVS30; | |
711 | capa = VS30 | VS18; | |
712 | } else { | |
713 | hctl = SDVS18; | |
714 | capa = VS18; | |
715 | } | |
716 | ||
5a52b08b B |
717 | if (host->mmc->caps & MMC_CAP_SDIO_IRQ) |
718 | hctl |= IWE; | |
719 | ||
11dd62a7 DK |
720 | OMAP_HSMMC_WRITE(host->base, HCTL, |
721 | OMAP_HSMMC_READ(host->base, HCTL) | hctl); | |
722 | ||
723 | OMAP_HSMMC_WRITE(host->base, CAPA, | |
724 | OMAP_HSMMC_READ(host->base, CAPA) | capa); | |
725 | ||
726 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
727 | OMAP_HSMMC_READ(host->base, HCTL) | SDBP); | |
728 | ||
729 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
730 | while ((OMAP_HSMMC_READ(host->base, HCTL) & SDBP) != SDBP | |
731 | && time_before(jiffies, timeout)) | |
732 | ; | |
733 | ||
2cd3a2a5 AF |
734 | OMAP_HSMMC_WRITE(host->base, ISE, 0); |
735 | OMAP_HSMMC_WRITE(host->base, IE, 0); | |
736 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); | |
11dd62a7 DK |
737 | |
738 | /* Do not initialize card-specific things if the power is off */ | |
739 | if (host->power_mode == MMC_POWER_OFF) | |
740 | goto out; | |
741 | ||
3796fb8a | 742 | omap_hsmmc_set_bus_width(host); |
11dd62a7 | 743 | |
5934df2f | 744 | omap_hsmmc_set_clock(host); |
11dd62a7 | 745 | |
3796fb8a AS |
746 | omap_hsmmc_set_bus_mode(host); |
747 | ||
11dd62a7 | 748 | out: |
0a82e06e TL |
749 | dev_dbg(mmc_dev(host->mmc), "context is restored: restore count %d\n", |
750 | host->context_loss); | |
11dd62a7 DK |
751 | return 0; |
752 | } | |
753 | ||
754 | /* | |
755 | * Save the MMC host context (store the number of power state changes so far). | |
756 | */ | |
70a3341a | 757 | static void omap_hsmmc_context_save(struct omap_hsmmc_host *host) |
11dd62a7 | 758 | { |
0a82e06e TL |
759 | host->con = OMAP_HSMMC_READ(host->base, CON); |
760 | host->hctl = OMAP_HSMMC_READ(host->base, HCTL); | |
761 | host->sysctl = OMAP_HSMMC_READ(host->base, SYSCTL); | |
762 | host->capa = OMAP_HSMMC_READ(host->base, CAPA); | |
11dd62a7 DK |
763 | } |
764 | ||
765 | #else | |
766 | ||
70a3341a | 767 | static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host) |
11dd62a7 DK |
768 | { |
769 | return 0; | |
770 | } | |
771 | ||
70a3341a | 772 | static void omap_hsmmc_context_save(struct omap_hsmmc_host *host) |
11dd62a7 DK |
773 | { |
774 | } | |
775 | ||
776 | #endif | |
777 | ||
a45c6cb8 MC |
778 | /* |
779 | * Send init stream sequence to card | |
780 | * before sending IDLE command | |
781 | */ | |
70a3341a | 782 | static void send_init_stream(struct omap_hsmmc_host *host) |
a45c6cb8 MC |
783 | { |
784 | int reg = 0; | |
785 | unsigned long timeout; | |
786 | ||
b62f6228 AH |
787 | if (host->protect_card) |
788 | return; | |
789 | ||
a45c6cb8 | 790 | disable_irq(host->irq); |
b417577d AH |
791 | |
792 | OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK); | |
a45c6cb8 MC |
793 | OMAP_HSMMC_WRITE(host->base, CON, |
794 | OMAP_HSMMC_READ(host->base, CON) | INIT_STREAM); | |
795 | OMAP_HSMMC_WRITE(host->base, CMD, INIT_STREAM_CMD); | |
796 | ||
797 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
a7e96879 V |
798 | while ((reg != CC_EN) && time_before(jiffies, timeout)) |
799 | reg = OMAP_HSMMC_READ(host->base, STAT) & CC_EN; | |
a45c6cb8 MC |
800 | |
801 | OMAP_HSMMC_WRITE(host->base, CON, | |
802 | OMAP_HSMMC_READ(host->base, CON) & ~INIT_STREAM); | |
c653a6d4 AH |
803 | |
804 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); | |
805 | OMAP_HSMMC_READ(host->base, STAT); | |
806 | ||
a45c6cb8 MC |
807 | enable_irq(host->irq); |
808 | } | |
809 | ||
810 | static inline | |
70a3341a | 811 | int omap_hsmmc_cover_is_closed(struct omap_hsmmc_host *host) |
a45c6cb8 MC |
812 | { |
813 | int r = 1; | |
814 | ||
b5cd43f0 | 815 | if (host->get_cover_state) |
80412ca8 | 816 | r = host->get_cover_state(host->dev); |
a45c6cb8 MC |
817 | return r; |
818 | } | |
819 | ||
820 | static ssize_t | |
70a3341a | 821 | omap_hsmmc_show_cover_switch(struct device *dev, struct device_attribute *attr, |
a45c6cb8 MC |
822 | char *buf) |
823 | { | |
824 | struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev); | |
70a3341a | 825 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 826 | |
70a3341a DK |
827 | return sprintf(buf, "%s\n", |
828 | omap_hsmmc_cover_is_closed(host) ? "closed" : "open"); | |
a45c6cb8 MC |
829 | } |
830 | ||
70a3341a | 831 | static DEVICE_ATTR(cover_switch, S_IRUGO, omap_hsmmc_show_cover_switch, NULL); |
a45c6cb8 MC |
832 | |
833 | static ssize_t | |
70a3341a | 834 | omap_hsmmc_show_slot_name(struct device *dev, struct device_attribute *attr, |
a45c6cb8 MC |
835 | char *buf) |
836 | { | |
837 | struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev); | |
70a3341a | 838 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 839 | |
326119c9 | 840 | return sprintf(buf, "%s\n", mmc_pdata(host)->name); |
a45c6cb8 MC |
841 | } |
842 | ||
70a3341a | 843 | static DEVICE_ATTR(slot_name, S_IRUGO, omap_hsmmc_show_slot_name, NULL); |
a45c6cb8 MC |
844 | |
845 | /* | |
846 | * Configure the response type and send the cmd. | |
847 | */ | |
848 | static void | |
70a3341a | 849 | omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd, |
a45c6cb8 MC |
850 | struct mmc_data *data) |
851 | { | |
852 | int cmdreg = 0, resptype = 0, cmdtype = 0; | |
853 | ||
8986d31b | 854 | dev_vdbg(mmc_dev(host->mmc), "%s: CMD%d, argument 0x%08x\n", |
a45c6cb8 MC |
855 | mmc_hostname(host->mmc), cmd->opcode, cmd->arg); |
856 | host->cmd = cmd; | |
857 | ||
93caf8e6 | 858 | omap_hsmmc_enable_irq(host, cmd); |
a45c6cb8 | 859 | |
4a694dc9 | 860 | host->response_busy = 0; |
a45c6cb8 MC |
861 | if (cmd->flags & MMC_RSP_PRESENT) { |
862 | if (cmd->flags & MMC_RSP_136) | |
863 | resptype = 1; | |
4a694dc9 AH |
864 | else if (cmd->flags & MMC_RSP_BUSY) { |
865 | resptype = 3; | |
866 | host->response_busy = 1; | |
867 | } else | |
a45c6cb8 MC |
868 | resptype = 2; |
869 | } | |
870 | ||
871 | /* | |
872 | * Unlike OMAP1 controller, the cmdtype does not seem to be based on | |
873 | * ac, bc, adtc, bcr. Only commands ending an open ended transfer need | |
874 | * a val of 0x3, rest 0x0. | |
875 | */ | |
876 | if (cmd == host->mrq->stop) | |
877 | cmdtype = 0x3; | |
878 | ||
879 | cmdreg = (cmd->opcode << 24) | (resptype << 16) | (cmdtype << 22); | |
880 | ||
a2e77152 B |
881 | if ((host->flags & AUTO_CMD23) && mmc_op_multi(cmd->opcode) && |
882 | host->mrq->sbc) { | |
883 | cmdreg |= ACEN_ACMD23; | |
884 | OMAP_HSMMC_WRITE(host->base, SDMASA, host->mrq->sbc->arg); | |
885 | } | |
a45c6cb8 MC |
886 | if (data) { |
887 | cmdreg |= DP_SELECT | MSBS | BCE; | |
888 | if (data->flags & MMC_DATA_READ) | |
889 | cmdreg |= DDIR; | |
890 | else | |
891 | cmdreg &= ~(DDIR); | |
892 | } | |
893 | ||
894 | if (host->use_dma) | |
a7e96879 | 895 | cmdreg |= DMAE; |
a45c6cb8 | 896 | |
b417577d | 897 | host->req_in_progress = 1; |
4dffd7a2 | 898 | |
a45c6cb8 MC |
899 | OMAP_HSMMC_WRITE(host->base, ARG, cmd->arg); |
900 | OMAP_HSMMC_WRITE(host->base, CMD, cmdreg); | |
901 | } | |
902 | ||
0ccd76d4 | 903 | static int |
70a3341a | 904 | omap_hsmmc_get_dma_dir(struct omap_hsmmc_host *host, struct mmc_data *data) |
0ccd76d4 JY |
905 | { |
906 | if (data->flags & MMC_DATA_WRITE) | |
907 | return DMA_TO_DEVICE; | |
908 | else | |
909 | return DMA_FROM_DEVICE; | |
910 | } | |
911 | ||
c5c98927 RK |
912 | static struct dma_chan *omap_hsmmc_get_dma_chan(struct omap_hsmmc_host *host, |
913 | struct mmc_data *data) | |
914 | { | |
915 | return data->flags & MMC_DATA_WRITE ? host->tx_chan : host->rx_chan; | |
916 | } | |
917 | ||
b417577d AH |
918 | static void omap_hsmmc_request_done(struct omap_hsmmc_host *host, struct mmc_request *mrq) |
919 | { | |
920 | int dma_ch; | |
31463b14 | 921 | unsigned long flags; |
b417577d | 922 | |
31463b14 | 923 | spin_lock_irqsave(&host->irq_lock, flags); |
b417577d AH |
924 | host->req_in_progress = 0; |
925 | dma_ch = host->dma_ch; | |
31463b14 | 926 | spin_unlock_irqrestore(&host->irq_lock, flags); |
b417577d AH |
927 | |
928 | omap_hsmmc_disable_irq(host); | |
929 | /* Do not complete the request if DMA is still in progress */ | |
930 | if (mrq->data && host->use_dma && dma_ch != -1) | |
931 | return; | |
932 | host->mrq = NULL; | |
933 | mmc_request_done(host->mmc, mrq); | |
934 | } | |
935 | ||
a45c6cb8 MC |
936 | /* |
937 | * Notify the transfer complete to MMC core | |
938 | */ | |
939 | static void | |
70a3341a | 940 | omap_hsmmc_xfer_done(struct omap_hsmmc_host *host, struct mmc_data *data) |
a45c6cb8 | 941 | { |
4a694dc9 AH |
942 | if (!data) { |
943 | struct mmc_request *mrq = host->mrq; | |
944 | ||
23050103 AH |
945 | /* TC before CC from CMD6 - don't know why, but it happens */ |
946 | if (host->cmd && host->cmd->opcode == 6 && | |
947 | host->response_busy) { | |
948 | host->response_busy = 0; | |
949 | return; | |
950 | } | |
951 | ||
b417577d | 952 | omap_hsmmc_request_done(host, mrq); |
4a694dc9 AH |
953 | return; |
954 | } | |
955 | ||
a45c6cb8 MC |
956 | host->data = NULL; |
957 | ||
a45c6cb8 MC |
958 | if (!data->error) |
959 | data->bytes_xfered += data->blocks * (data->blksz); | |
960 | else | |
961 | data->bytes_xfered = 0; | |
962 | ||
bf129e1c B |
963 | if (data->stop && (data->error || !host->mrq->sbc)) |
964 | omap_hsmmc_start_command(host, data->stop, NULL); | |
965 | else | |
b417577d | 966 | omap_hsmmc_request_done(host, data->mrq); |
a45c6cb8 MC |
967 | } |
968 | ||
969 | /* | |
970 | * Notify the core about command completion | |
971 | */ | |
972 | static void | |
70a3341a | 973 | omap_hsmmc_cmd_done(struct omap_hsmmc_host *host, struct mmc_command *cmd) |
a45c6cb8 | 974 | { |
bf129e1c | 975 | if (host->mrq->sbc && (host->cmd == host->mrq->sbc) && |
a2e77152 | 976 | !host->mrq->sbc->error && !(host->flags & AUTO_CMD23)) { |
2177fa94 | 977 | host->cmd = NULL; |
bf129e1c B |
978 | omap_hsmmc_start_dma_transfer(host); |
979 | omap_hsmmc_start_command(host, host->mrq->cmd, | |
980 | host->mrq->data); | |
981 | return; | |
982 | } | |
983 | ||
2177fa94 B |
984 | host->cmd = NULL; |
985 | ||
a45c6cb8 MC |
986 | if (cmd->flags & MMC_RSP_PRESENT) { |
987 | if (cmd->flags & MMC_RSP_136) { | |
988 | /* response type 2 */ | |
989 | cmd->resp[3] = OMAP_HSMMC_READ(host->base, RSP10); | |
990 | cmd->resp[2] = OMAP_HSMMC_READ(host->base, RSP32); | |
991 | cmd->resp[1] = OMAP_HSMMC_READ(host->base, RSP54); | |
992 | cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP76); | |
993 | } else { | |
994 | /* response types 1, 1b, 3, 4, 5, 6 */ | |
995 | cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP10); | |
996 | } | |
997 | } | |
b417577d | 998 | if ((host->data == NULL && !host->response_busy) || cmd->error) |
d4b2c375 | 999 | omap_hsmmc_request_done(host, host->mrq); |
a45c6cb8 MC |
1000 | } |
1001 | ||
1002 | /* | |
1003 | * DMA clean up for command errors | |
1004 | */ | |
70a3341a | 1005 | static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno) |
a45c6cb8 | 1006 | { |
b417577d | 1007 | int dma_ch; |
31463b14 | 1008 | unsigned long flags; |
b417577d | 1009 | |
82788ff5 | 1010 | host->data->error = errno; |
a45c6cb8 | 1011 | |
31463b14 | 1012 | spin_lock_irqsave(&host->irq_lock, flags); |
b417577d AH |
1013 | dma_ch = host->dma_ch; |
1014 | host->dma_ch = -1; | |
31463b14 | 1015 | spin_unlock_irqrestore(&host->irq_lock, flags); |
b417577d AH |
1016 | |
1017 | if (host->use_dma && dma_ch != -1) { | |
c5c98927 RK |
1018 | struct dma_chan *chan = omap_hsmmc_get_dma_chan(host, host->data); |
1019 | ||
1020 | dmaengine_terminate_all(chan); | |
1021 | dma_unmap_sg(chan->device->dev, | |
1022 | host->data->sg, host->data->sg_len, | |
70a3341a | 1023 | omap_hsmmc_get_dma_dir(host, host->data)); |
c5c98927 | 1024 | |
053bf34f | 1025 | host->data->host_cookie = 0; |
a45c6cb8 MC |
1026 | } |
1027 | host->data = NULL; | |
a45c6cb8 MC |
1028 | } |
1029 | ||
1030 | /* | |
1031 | * Readable error output | |
1032 | */ | |
1033 | #ifdef CONFIG_MMC_DEBUG | |
699b958b | 1034 | static void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host, u32 status) |
a45c6cb8 MC |
1035 | { |
1036 | /* --- means reserved bit without definition at documentation */ | |
70a3341a | 1037 | static const char *omap_hsmmc_status_bits[] = { |
699b958b AH |
1038 | "CC" , "TC" , "BGE", "---", "BWR" , "BRR" , "---" , "---" , |
1039 | "CIRQ", "OBI" , "---", "---", "---" , "---" , "---" , "ERRI", | |
1040 | "CTO" , "CCRC", "CEB", "CIE", "DTO" , "DCRC", "DEB" , "---" , | |
1041 | "ACE" , "---" , "---", "---", "CERR", "BADA", "---" , "---" | |
a45c6cb8 MC |
1042 | }; |
1043 | char res[256]; | |
1044 | char *buf = res; | |
1045 | int len, i; | |
1046 | ||
1047 | len = sprintf(buf, "MMC IRQ 0x%x :", status); | |
1048 | buf += len; | |
1049 | ||
70a3341a | 1050 | for (i = 0; i < ARRAY_SIZE(omap_hsmmc_status_bits); i++) |
a45c6cb8 | 1051 | if (status & (1 << i)) { |
70a3341a | 1052 | len = sprintf(buf, " %s", omap_hsmmc_status_bits[i]); |
a45c6cb8 MC |
1053 | buf += len; |
1054 | } | |
1055 | ||
8986d31b | 1056 | dev_vdbg(mmc_dev(host->mmc), "%s\n", res); |
a45c6cb8 | 1057 | } |
699b958b AH |
1058 | #else |
1059 | static inline void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host, | |
1060 | u32 status) | |
1061 | { | |
1062 | } | |
a45c6cb8 MC |
1063 | #endif /* CONFIG_MMC_DEBUG */ |
1064 | ||
3ebf74b1 JP |
1065 | /* |
1066 | * MMC controller internal state machines reset | |
1067 | * | |
1068 | * Used to reset command or data internal state machines, using respectively | |
1069 | * SRC or SRD bit of SYSCTL register | |
1070 | * Can be called from interrupt context | |
1071 | */ | |
70a3341a DK |
1072 | static inline void omap_hsmmc_reset_controller_fsm(struct omap_hsmmc_host *host, |
1073 | unsigned long bit) | |
3ebf74b1 JP |
1074 | { |
1075 | unsigned long i = 0; | |
1e881786 | 1076 | unsigned long limit = MMC_TIMEOUT_US; |
3ebf74b1 JP |
1077 | |
1078 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
1079 | OMAP_HSMMC_READ(host->base, SYSCTL) | bit); | |
1080 | ||
07ad64b6 MC |
1081 | /* |
1082 | * OMAP4 ES2 and greater has an updated reset logic. | |
1083 | * Monitor a 0->1 transition first | |
1084 | */ | |
326119c9 | 1085 | if (mmc_pdata(host)->features & HSMMC_HAS_UPDATED_RESET) { |
b432b4b3 | 1086 | while ((!(OMAP_HSMMC_READ(host->base, SYSCTL) & bit)) |
07ad64b6 | 1087 | && (i++ < limit)) |
1e881786 | 1088 | udelay(1); |
07ad64b6 MC |
1089 | } |
1090 | i = 0; | |
1091 | ||
3ebf74b1 JP |
1092 | while ((OMAP_HSMMC_READ(host->base, SYSCTL) & bit) && |
1093 | (i++ < limit)) | |
1e881786 | 1094 | udelay(1); |
3ebf74b1 JP |
1095 | |
1096 | if (OMAP_HSMMC_READ(host->base, SYSCTL) & bit) | |
1097 | dev_err(mmc_dev(host->mmc), | |
1098 | "Timeout waiting on controller reset in %s\n", | |
1099 | __func__); | |
1100 | } | |
a45c6cb8 | 1101 | |
25e1897b B |
1102 | static void hsmmc_command_incomplete(struct omap_hsmmc_host *host, |
1103 | int err, int end_cmd) | |
ae4bf788 | 1104 | { |
25e1897b | 1105 | if (end_cmd) { |
94d4f272 | 1106 | omap_hsmmc_reset_controller_fsm(host, SRC); |
25e1897b B |
1107 | if (host->cmd) |
1108 | host->cmd->error = err; | |
1109 | } | |
ae4bf788 V |
1110 | |
1111 | if (host->data) { | |
1112 | omap_hsmmc_reset_controller_fsm(host, SRD); | |
1113 | omap_hsmmc_dma_cleanup(host, err); | |
dc7745bd B |
1114 | } else if (host->mrq && host->mrq->cmd) |
1115 | host->mrq->cmd->error = err; | |
ae4bf788 V |
1116 | } |
1117 | ||
b417577d | 1118 | static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status) |
a45c6cb8 | 1119 | { |
a45c6cb8 | 1120 | struct mmc_data *data; |
b417577d | 1121 | int end_cmd = 0, end_trans = 0; |
a2e77152 | 1122 | int error = 0; |
b417577d | 1123 | |
a45c6cb8 | 1124 | data = host->data; |
8986d31b | 1125 | dev_vdbg(mmc_dev(host->mmc), "IRQ Status is %x\n", status); |
a45c6cb8 | 1126 | |
a7e96879 | 1127 | if (status & ERR_EN) { |
699b958b | 1128 | omap_hsmmc_dbg_report_irq(host, status); |
25e1897b | 1129 | |
a7e96879 | 1130 | if (status & (CTO_EN | CCRC_EN)) |
25e1897b | 1131 | end_cmd = 1; |
a7e96879 | 1132 | if (status & (CTO_EN | DTO_EN)) |
25e1897b | 1133 | hsmmc_command_incomplete(host, -ETIMEDOUT, end_cmd); |
a7e96879 | 1134 | else if (status & (CCRC_EN | DCRC_EN)) |
25e1897b | 1135 | hsmmc_command_incomplete(host, -EILSEQ, end_cmd); |
ae4bf788 | 1136 | |
a2e77152 B |
1137 | if (status & ACE_EN) { |
1138 | u32 ac12; | |
1139 | ac12 = OMAP_HSMMC_READ(host->base, AC12); | |
1140 | if (!(ac12 & ACNE) && host->mrq->sbc) { | |
1141 | end_cmd = 1; | |
1142 | if (ac12 & ACTO) | |
1143 | error = -ETIMEDOUT; | |
1144 | else if (ac12 & (ACCE | ACEB | ACIE)) | |
1145 | error = -EILSEQ; | |
1146 | host->mrq->sbc->error = error; | |
1147 | hsmmc_command_incomplete(host, error, end_cmd); | |
1148 | } | |
1149 | dev_dbg(mmc_dev(host->mmc), "AC12 err: 0x%x\n", ac12); | |
1150 | } | |
ae4bf788 | 1151 | if (host->data || host->response_busy) { |
25e1897b | 1152 | end_trans = !end_cmd; |
ae4bf788 | 1153 | host->response_busy = 0; |
a45c6cb8 MC |
1154 | } |
1155 | } | |
1156 | ||
7472bab2 | 1157 | OMAP_HSMMC_WRITE(host->base, STAT, status); |
a7e96879 | 1158 | if (end_cmd || ((status & CC_EN) && host->cmd)) |
70a3341a | 1159 | omap_hsmmc_cmd_done(host, host->cmd); |
a7e96879 | 1160 | if ((end_trans || (status & TC_EN)) && host->mrq) |
70a3341a | 1161 | omap_hsmmc_xfer_done(host, data); |
b417577d | 1162 | } |
a45c6cb8 | 1163 | |
b417577d AH |
1164 | /* |
1165 | * MMC controller IRQ handler | |
1166 | */ | |
1167 | static irqreturn_t omap_hsmmc_irq(int irq, void *dev_id) | |
1168 | { | |
1169 | struct omap_hsmmc_host *host = dev_id; | |
1170 | int status; | |
1171 | ||
1172 | status = OMAP_HSMMC_READ(host->base, STAT); | |
2cd3a2a5 AF |
1173 | while (status & (INT_EN_MASK | CIRQ_EN)) { |
1174 | if (host->req_in_progress) | |
1175 | omap_hsmmc_do_irq(host, status); | |
1176 | ||
1177 | if (status & CIRQ_EN) | |
1178 | mmc_signal_sdio_irq(host->mmc); | |
1f6b9fa4 | 1179 | |
b417577d AH |
1180 | /* Flush posted write */ |
1181 | status = OMAP_HSMMC_READ(host->base, STAT); | |
1f6b9fa4 | 1182 | } |
4dffd7a2 | 1183 | |
a45c6cb8 MC |
1184 | return IRQ_HANDLED; |
1185 | } | |
1186 | ||
2cd3a2a5 AF |
1187 | static irqreturn_t omap_hsmmc_wake_irq(int irq, void *dev_id) |
1188 | { | |
1189 | struct omap_hsmmc_host *host = dev_id; | |
1190 | ||
1191 | /* cirq is level triggered, disable to avoid infinite loop */ | |
1192 | spin_lock(&host->irq_lock); | |
1193 | if (host->flags & HSMMC_WAKE_IRQ_ENABLED) { | |
1194 | disable_irq_nosync(host->wake_irq); | |
1195 | host->flags &= ~HSMMC_WAKE_IRQ_ENABLED; | |
1196 | } | |
1197 | spin_unlock(&host->irq_lock); | |
1198 | pm_request_resume(host->dev); /* no use counter */ | |
1199 | ||
1200 | return IRQ_HANDLED; | |
1201 | } | |
1202 | ||
70a3341a | 1203 | static void set_sd_bus_power(struct omap_hsmmc_host *host) |
e13bb300 AH |
1204 | { |
1205 | unsigned long i; | |
1206 | ||
1207 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
1208 | OMAP_HSMMC_READ(host->base, HCTL) | SDBP); | |
1209 | for (i = 0; i < loops_per_jiffy; i++) { | |
1210 | if (OMAP_HSMMC_READ(host->base, HCTL) & SDBP) | |
1211 | break; | |
1212 | cpu_relax(); | |
1213 | } | |
1214 | } | |
1215 | ||
a45c6cb8 | 1216 | /* |
eb250826 DB |
1217 | * Switch MMC interface voltage ... only relevant for MMC1. |
1218 | * | |
1219 | * MMC2 and MMC3 use fixed 1.8V levels, and maybe a transceiver. | |
1220 | * The MMC2 transceiver controls are used instead of DAT4..DAT7. | |
1221 | * Some chips, like eMMC ones, use internal transceivers. | |
a45c6cb8 | 1222 | */ |
70a3341a | 1223 | static int omap_hsmmc_switch_opcond(struct omap_hsmmc_host *host, int vdd) |
a45c6cb8 MC |
1224 | { |
1225 | u32 reg_val = 0; | |
1226 | int ret; | |
1227 | ||
1228 | /* Disable the clocks */ | |
fa4aa2d4 | 1229 | pm_runtime_put_sync(host->dev); |
cd03d9a8 | 1230 | if (host->dbclk) |
94c18149 | 1231 | clk_disable_unprepare(host->dbclk); |
a45c6cb8 MC |
1232 | |
1233 | /* Turn the power off */ | |
80412ca8 | 1234 | ret = mmc_pdata(host)->set_power(host->dev, 0, 0); |
a45c6cb8 MC |
1235 | |
1236 | /* Turn the power ON with given VDD 1.8 or 3.0v */ | |
2bec0893 | 1237 | if (!ret) |
80412ca8 | 1238 | ret = mmc_pdata(host)->set_power(host->dev, 1, vdd); |
fa4aa2d4 | 1239 | pm_runtime_get_sync(host->dev); |
cd03d9a8 | 1240 | if (host->dbclk) |
94c18149 | 1241 | clk_prepare_enable(host->dbclk); |
2bec0893 | 1242 | |
a45c6cb8 MC |
1243 | if (ret != 0) |
1244 | goto err; | |
1245 | ||
a45c6cb8 MC |
1246 | OMAP_HSMMC_WRITE(host->base, HCTL, |
1247 | OMAP_HSMMC_READ(host->base, HCTL) & SDVSCLR); | |
1248 | reg_val = OMAP_HSMMC_READ(host->base, HCTL); | |
eb250826 | 1249 | |
a45c6cb8 MC |
1250 | /* |
1251 | * If a MMC dual voltage card is detected, the set_ios fn calls | |
1252 | * this fn with VDD bit set for 1.8V. Upon card removal from the | |
70a3341a | 1253 | * slot, omap_hsmmc_set_ios sets the VDD back to 3V on MMC_POWER_OFF. |
a45c6cb8 | 1254 | * |
eb250826 DB |
1255 | * Cope with a bit of slop in the range ... per data sheets: |
1256 | * - "1.8V" for vdds_mmc1/vdds_mmc1a can be up to 2.45V max, | |
1257 | * but recommended values are 1.71V to 1.89V | |
1258 | * - "3.0V" for vdds_mmc1/vdds_mmc1a can be up to 3.5V max, | |
1259 | * but recommended values are 2.7V to 3.3V | |
1260 | * | |
1261 | * Board setup code shouldn't permit anything very out-of-range. | |
1262 | * TWL4030-family VMMC1 and VSIM regulators are fine (avoiding the | |
1263 | * middle range) but VSIM can't power DAT4..DAT7 at more than 3V. | |
a45c6cb8 | 1264 | */ |
eb250826 | 1265 | if ((1 << vdd) <= MMC_VDD_23_24) |
a45c6cb8 | 1266 | reg_val |= SDVS18; |
eb250826 DB |
1267 | else |
1268 | reg_val |= SDVS30; | |
a45c6cb8 MC |
1269 | |
1270 | OMAP_HSMMC_WRITE(host->base, HCTL, reg_val); | |
e13bb300 | 1271 | set_sd_bus_power(host); |
a45c6cb8 MC |
1272 | |
1273 | return 0; | |
1274 | err: | |
b1e056ae | 1275 | dev_err(mmc_dev(host->mmc), "Unable to switch operating voltage\n"); |
a45c6cb8 MC |
1276 | return ret; |
1277 | } | |
1278 | ||
b62f6228 AH |
1279 | /* Protect the card while the cover is open */ |
1280 | static void omap_hsmmc_protect_card(struct omap_hsmmc_host *host) | |
1281 | { | |
b5cd43f0 | 1282 | if (!host->get_cover_state) |
b62f6228 AH |
1283 | return; |
1284 | ||
1285 | host->reqs_blocked = 0; | |
80412ca8 | 1286 | if (host->get_cover_state(host->dev)) { |
b62f6228 | 1287 | if (host->protect_card) { |
2cecdf00 | 1288 | dev_info(host->dev, "%s: cover is closed, " |
b62f6228 AH |
1289 | "card is now accessible\n", |
1290 | mmc_hostname(host->mmc)); | |
1291 | host->protect_card = 0; | |
1292 | } | |
1293 | } else { | |
1294 | if (!host->protect_card) { | |
2cecdf00 | 1295 | dev_info(host->dev, "%s: cover is open, " |
b62f6228 AH |
1296 | "card is now inaccessible\n", |
1297 | mmc_hostname(host->mmc)); | |
1298 | host->protect_card = 1; | |
1299 | } | |
1300 | } | |
1301 | } | |
1302 | ||
a45c6cb8 | 1303 | /* |
7efab4f3 | 1304 | * irq handler to notify the core about card insertion/removal |
a45c6cb8 | 1305 | */ |
7efab4f3 | 1306 | static irqreturn_t omap_hsmmc_detect(int irq, void *dev_id) |
a45c6cb8 | 1307 | { |
7efab4f3 | 1308 | struct omap_hsmmc_host *host = dev_id; |
a6b2240d AH |
1309 | int carddetect; |
1310 | ||
a6b2240d | 1311 | sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch"); |
249d0fa9 | 1312 | |
b5cd43f0 | 1313 | if (host->card_detect) |
80412ca8 | 1314 | carddetect = host->card_detect(host->dev); |
b62f6228 AH |
1315 | else { |
1316 | omap_hsmmc_protect_card(host); | |
a6b2240d | 1317 | carddetect = -ENOSYS; |
b62f6228 | 1318 | } |
a45c6cb8 | 1319 | |
cdeebadd | 1320 | if (carddetect) |
a45c6cb8 | 1321 | mmc_detect_change(host->mmc, (HZ * 200) / 1000); |
cdeebadd | 1322 | else |
a45c6cb8 | 1323 | mmc_detect_change(host->mmc, (HZ * 50) / 1000); |
a45c6cb8 MC |
1324 | return IRQ_HANDLED; |
1325 | } | |
1326 | ||
c5c98927 | 1327 | static void omap_hsmmc_dma_callback(void *param) |
a45c6cb8 | 1328 | { |
c5c98927 RK |
1329 | struct omap_hsmmc_host *host = param; |
1330 | struct dma_chan *chan; | |
770d7432 | 1331 | struct mmc_data *data; |
c5c98927 | 1332 | int req_in_progress; |
a45c6cb8 | 1333 | |
c5c98927 | 1334 | spin_lock_irq(&host->irq_lock); |
b417577d | 1335 | if (host->dma_ch < 0) { |
c5c98927 | 1336 | spin_unlock_irq(&host->irq_lock); |
a45c6cb8 | 1337 | return; |
b417577d | 1338 | } |
a45c6cb8 | 1339 | |
770d7432 | 1340 | data = host->mrq->data; |
c5c98927 | 1341 | chan = omap_hsmmc_get_dma_chan(host, data); |
9782aff8 | 1342 | if (!data->host_cookie) |
c5c98927 RK |
1343 | dma_unmap_sg(chan->device->dev, |
1344 | data->sg, data->sg_len, | |
9782aff8 | 1345 | omap_hsmmc_get_dma_dir(host, data)); |
b417577d AH |
1346 | |
1347 | req_in_progress = host->req_in_progress; | |
a45c6cb8 | 1348 | host->dma_ch = -1; |
c5c98927 | 1349 | spin_unlock_irq(&host->irq_lock); |
b417577d AH |
1350 | |
1351 | /* If DMA has finished after TC, complete the request */ | |
1352 | if (!req_in_progress) { | |
1353 | struct mmc_request *mrq = host->mrq; | |
1354 | ||
1355 | host->mrq = NULL; | |
1356 | mmc_request_done(host->mmc, mrq); | |
1357 | } | |
a45c6cb8 MC |
1358 | } |
1359 | ||
9782aff8 PF |
1360 | static int omap_hsmmc_pre_dma_transfer(struct omap_hsmmc_host *host, |
1361 | struct mmc_data *data, | |
c5c98927 | 1362 | struct omap_hsmmc_next *next, |
26b88520 | 1363 | struct dma_chan *chan) |
9782aff8 PF |
1364 | { |
1365 | int dma_len; | |
1366 | ||
1367 | if (!next && data->host_cookie && | |
1368 | data->host_cookie != host->next_data.cookie) { | |
2cecdf00 | 1369 | dev_warn(host->dev, "[%s] invalid cookie: data->host_cookie %d" |
9782aff8 PF |
1370 | " host->next_data.cookie %d\n", |
1371 | __func__, data->host_cookie, host->next_data.cookie); | |
1372 | data->host_cookie = 0; | |
1373 | } | |
1374 | ||
1375 | /* Check if next job is already prepared */ | |
b38313d6 | 1376 | if (next || data->host_cookie != host->next_data.cookie) { |
26b88520 | 1377 | dma_len = dma_map_sg(chan->device->dev, data->sg, data->sg_len, |
9782aff8 PF |
1378 | omap_hsmmc_get_dma_dir(host, data)); |
1379 | ||
1380 | } else { | |
1381 | dma_len = host->next_data.dma_len; | |
1382 | host->next_data.dma_len = 0; | |
1383 | } | |
1384 | ||
1385 | ||
1386 | if (dma_len == 0) | |
1387 | return -EINVAL; | |
1388 | ||
1389 | if (next) { | |
1390 | next->dma_len = dma_len; | |
1391 | data->host_cookie = ++next->cookie < 0 ? 1 : next->cookie; | |
1392 | } else | |
1393 | host->dma_len = dma_len; | |
1394 | ||
1395 | return 0; | |
1396 | } | |
1397 | ||
a45c6cb8 MC |
1398 | /* |
1399 | * Routine to configure and start DMA for the MMC card | |
1400 | */ | |
9d025334 | 1401 | static int omap_hsmmc_setup_dma_transfer(struct omap_hsmmc_host *host, |
70a3341a | 1402 | struct mmc_request *req) |
a45c6cb8 | 1403 | { |
26b88520 RK |
1404 | struct dma_slave_config cfg; |
1405 | struct dma_async_tx_descriptor *tx; | |
1406 | int ret = 0, i; | |
a45c6cb8 | 1407 | struct mmc_data *data = req->data; |
c5c98927 | 1408 | struct dma_chan *chan; |
a45c6cb8 | 1409 | |
0ccd76d4 | 1410 | /* Sanity check: all the SG entries must be aligned by block size. */ |
a3f406f8 | 1411 | for (i = 0; i < data->sg_len; i++) { |
0ccd76d4 JY |
1412 | struct scatterlist *sgl; |
1413 | ||
1414 | sgl = data->sg + i; | |
1415 | if (sgl->length % data->blksz) | |
1416 | return -EINVAL; | |
1417 | } | |
1418 | if ((data->blksz % 4) != 0) | |
1419 | /* REVISIT: The MMC buffer increments only when MSB is written. | |
1420 | * Return error for blksz which is non multiple of four. | |
1421 | */ | |
1422 | return -EINVAL; | |
1423 | ||
b417577d | 1424 | BUG_ON(host->dma_ch != -1); |
a45c6cb8 | 1425 | |
c5c98927 | 1426 | chan = omap_hsmmc_get_dma_chan(host, data); |
c5c98927 | 1427 | |
26b88520 RK |
1428 | cfg.src_addr = host->mapbase + OMAP_HSMMC_DATA; |
1429 | cfg.dst_addr = host->mapbase + OMAP_HSMMC_DATA; | |
1430 | cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
1431 | cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
1432 | cfg.src_maxburst = data->blksz / 4; | |
1433 | cfg.dst_maxburst = data->blksz / 4; | |
c5c98927 | 1434 | |
26b88520 RK |
1435 | ret = dmaengine_slave_config(chan, &cfg); |
1436 | if (ret) | |
a45c6cb8 | 1437 | return ret; |
c5c98927 | 1438 | |
26b88520 | 1439 | ret = omap_hsmmc_pre_dma_transfer(host, data, NULL, chan); |
9782aff8 PF |
1440 | if (ret) |
1441 | return ret; | |
a45c6cb8 | 1442 | |
26b88520 RK |
1443 | tx = dmaengine_prep_slave_sg(chan, data->sg, data->sg_len, |
1444 | data->flags & MMC_DATA_WRITE ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM, | |
1445 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
1446 | if (!tx) { | |
1447 | dev_err(mmc_dev(host->mmc), "prep_slave_sg() failed\n"); | |
1448 | /* FIXME: cleanup */ | |
1449 | return -1; | |
1450 | } | |
a45c6cb8 | 1451 | |
26b88520 RK |
1452 | tx->callback = omap_hsmmc_dma_callback; |
1453 | tx->callback_param = host; | |
a45c6cb8 | 1454 | |
26b88520 RK |
1455 | /* Does not fail */ |
1456 | dmaengine_submit(tx); | |
c5c98927 | 1457 | |
26b88520 | 1458 | host->dma_ch = 1; |
c5c98927 | 1459 | |
a45c6cb8 MC |
1460 | return 0; |
1461 | } | |
1462 | ||
70a3341a | 1463 | static void set_data_timeout(struct omap_hsmmc_host *host, |
e2bf08d6 AH |
1464 | unsigned int timeout_ns, |
1465 | unsigned int timeout_clks) | |
a45c6cb8 MC |
1466 | { |
1467 | unsigned int timeout, cycle_ns; | |
1468 | uint32_t reg, clkd, dto = 0; | |
1469 | ||
1470 | reg = OMAP_HSMMC_READ(host->base, SYSCTL); | |
1471 | clkd = (reg & CLKD_MASK) >> CLKD_SHIFT; | |
1472 | if (clkd == 0) | |
1473 | clkd = 1; | |
1474 | ||
6e3076c2 | 1475 | cycle_ns = 1000000000 / (host->clk_rate / clkd); |
e2bf08d6 AH |
1476 | timeout = timeout_ns / cycle_ns; |
1477 | timeout += timeout_clks; | |
a45c6cb8 MC |
1478 | if (timeout) { |
1479 | while ((timeout & 0x80000000) == 0) { | |
1480 | dto += 1; | |
1481 | timeout <<= 1; | |
1482 | } | |
1483 | dto = 31 - dto; | |
1484 | timeout <<= 1; | |
1485 | if (timeout && dto) | |
1486 | dto += 1; | |
1487 | if (dto >= 13) | |
1488 | dto -= 13; | |
1489 | else | |
1490 | dto = 0; | |
1491 | if (dto > 14) | |
1492 | dto = 14; | |
1493 | } | |
1494 | ||
1495 | reg &= ~DTO_MASK; | |
1496 | reg |= dto << DTO_SHIFT; | |
1497 | OMAP_HSMMC_WRITE(host->base, SYSCTL, reg); | |
1498 | } | |
1499 | ||
9d025334 B |
1500 | static void omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host) |
1501 | { | |
1502 | struct mmc_request *req = host->mrq; | |
1503 | struct dma_chan *chan; | |
1504 | ||
1505 | if (!req->data) | |
1506 | return; | |
1507 | OMAP_HSMMC_WRITE(host->base, BLK, (req->data->blksz) | |
1508 | | (req->data->blocks << 16)); | |
1509 | set_data_timeout(host, req->data->timeout_ns, | |
1510 | req->data->timeout_clks); | |
1511 | chan = omap_hsmmc_get_dma_chan(host, req->data); | |
1512 | dma_async_issue_pending(chan); | |
1513 | } | |
1514 | ||
a45c6cb8 MC |
1515 | /* |
1516 | * Configure block length for MMC/SD cards and initiate the transfer. | |
1517 | */ | |
1518 | static int | |
70a3341a | 1519 | omap_hsmmc_prepare_data(struct omap_hsmmc_host *host, struct mmc_request *req) |
a45c6cb8 MC |
1520 | { |
1521 | int ret; | |
1522 | host->data = req->data; | |
1523 | ||
1524 | if (req->data == NULL) { | |
a45c6cb8 | 1525 | OMAP_HSMMC_WRITE(host->base, BLK, 0); |
e2bf08d6 AH |
1526 | /* |
1527 | * Set an arbitrary 100ms data timeout for commands with | |
1528 | * busy signal. | |
1529 | */ | |
1530 | if (req->cmd->flags & MMC_RSP_BUSY) | |
1531 | set_data_timeout(host, 100000000U, 0); | |
a45c6cb8 MC |
1532 | return 0; |
1533 | } | |
1534 | ||
a45c6cb8 | 1535 | if (host->use_dma) { |
9d025334 | 1536 | ret = omap_hsmmc_setup_dma_transfer(host, req); |
a45c6cb8 | 1537 | if (ret != 0) { |
b1e056ae | 1538 | dev_err(mmc_dev(host->mmc), "MMC start dma failure\n"); |
a45c6cb8 MC |
1539 | return ret; |
1540 | } | |
1541 | } | |
1542 | return 0; | |
1543 | } | |
1544 | ||
9782aff8 PF |
1545 | static void omap_hsmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq, |
1546 | int err) | |
1547 | { | |
1548 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1549 | struct mmc_data *data = mrq->data; | |
1550 | ||
26b88520 | 1551 | if (host->use_dma && data->host_cookie) { |
c5c98927 | 1552 | struct dma_chan *c = omap_hsmmc_get_dma_chan(host, data); |
c5c98927 | 1553 | |
26b88520 RK |
1554 | dma_unmap_sg(c->device->dev, data->sg, data->sg_len, |
1555 | omap_hsmmc_get_dma_dir(host, data)); | |
9782aff8 PF |
1556 | data->host_cookie = 0; |
1557 | } | |
1558 | } | |
1559 | ||
1560 | static void omap_hsmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq, | |
1561 | bool is_first_req) | |
1562 | { | |
1563 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1564 | ||
1565 | if (mrq->data->host_cookie) { | |
1566 | mrq->data->host_cookie = 0; | |
1567 | return ; | |
1568 | } | |
1569 | ||
c5c98927 RK |
1570 | if (host->use_dma) { |
1571 | struct dma_chan *c = omap_hsmmc_get_dma_chan(host, mrq->data); | |
c5c98927 | 1572 | |
9782aff8 | 1573 | if (omap_hsmmc_pre_dma_transfer(host, mrq->data, |
26b88520 | 1574 | &host->next_data, c)) |
9782aff8 | 1575 | mrq->data->host_cookie = 0; |
c5c98927 | 1576 | } |
9782aff8 PF |
1577 | } |
1578 | ||
a45c6cb8 MC |
1579 | /* |
1580 | * Request function. for read/write operation | |
1581 | */ | |
70a3341a | 1582 | static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req) |
a45c6cb8 | 1583 | { |
70a3341a | 1584 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a3f406f8 | 1585 | int err; |
a45c6cb8 | 1586 | |
b417577d AH |
1587 | BUG_ON(host->req_in_progress); |
1588 | BUG_ON(host->dma_ch != -1); | |
1589 | if (host->protect_card) { | |
1590 | if (host->reqs_blocked < 3) { | |
1591 | /* | |
1592 | * Ensure the controller is left in a consistent | |
1593 | * state by resetting the command and data state | |
1594 | * machines. | |
1595 | */ | |
1596 | omap_hsmmc_reset_controller_fsm(host, SRD); | |
1597 | omap_hsmmc_reset_controller_fsm(host, SRC); | |
1598 | host->reqs_blocked += 1; | |
1599 | } | |
1600 | req->cmd->error = -EBADF; | |
1601 | if (req->data) | |
1602 | req->data->error = -EBADF; | |
1603 | req->cmd->retries = 0; | |
1604 | mmc_request_done(mmc, req); | |
1605 | return; | |
1606 | } else if (host->reqs_blocked) | |
1607 | host->reqs_blocked = 0; | |
a45c6cb8 MC |
1608 | WARN_ON(host->mrq != NULL); |
1609 | host->mrq = req; | |
6e3076c2 | 1610 | host->clk_rate = clk_get_rate(host->fclk); |
70a3341a | 1611 | err = omap_hsmmc_prepare_data(host, req); |
a3f406f8 JL |
1612 | if (err) { |
1613 | req->cmd->error = err; | |
1614 | if (req->data) | |
1615 | req->data->error = err; | |
1616 | host->mrq = NULL; | |
1617 | mmc_request_done(mmc, req); | |
1618 | return; | |
1619 | } | |
a2e77152 | 1620 | if (req->sbc && !(host->flags & AUTO_CMD23)) { |
bf129e1c B |
1621 | omap_hsmmc_start_command(host, req->sbc, NULL); |
1622 | return; | |
1623 | } | |
a3f406f8 | 1624 | |
9d025334 | 1625 | omap_hsmmc_start_dma_transfer(host); |
70a3341a | 1626 | omap_hsmmc_start_command(host, req->cmd, req->data); |
a45c6cb8 MC |
1627 | } |
1628 | ||
a45c6cb8 | 1629 | /* Routine to configure clock values. Exposed API to core */ |
70a3341a | 1630 | static void omap_hsmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
a45c6cb8 | 1631 | { |
70a3341a | 1632 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a3621465 | 1633 | int do_send_init_stream = 0; |
a45c6cb8 | 1634 | |
fa4aa2d4 | 1635 | pm_runtime_get_sync(host->dev); |
5e2ea617 | 1636 | |
a3621465 AH |
1637 | if (ios->power_mode != host->power_mode) { |
1638 | switch (ios->power_mode) { | |
1639 | case MMC_POWER_OFF: | |
80412ca8 | 1640 | mmc_pdata(host)->set_power(host->dev, 0, 0); |
a3621465 AH |
1641 | break; |
1642 | case MMC_POWER_UP: | |
80412ca8 | 1643 | mmc_pdata(host)->set_power(host->dev, 1, ios->vdd); |
a3621465 AH |
1644 | break; |
1645 | case MMC_POWER_ON: | |
1646 | do_send_init_stream = 1; | |
1647 | break; | |
1648 | } | |
1649 | host->power_mode = ios->power_mode; | |
a45c6cb8 MC |
1650 | } |
1651 | ||
dd498eff DK |
1652 | /* FIXME: set registers based only on changes to ios */ |
1653 | ||
3796fb8a | 1654 | omap_hsmmc_set_bus_width(host); |
a45c6cb8 | 1655 | |
4621d5f8 | 1656 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { |
eb250826 DB |
1657 | /* Only MMC1 can interface at 3V without some flavor |
1658 | * of external transceiver; but they all handle 1.8V. | |
1659 | */ | |
a45c6cb8 | 1660 | if ((OMAP_HSMMC_READ(host->base, HCTL) & SDVSDET) && |
2cf171cb | 1661 | (ios->vdd == DUAL_VOLT_OCR_BIT)) { |
a45c6cb8 MC |
1662 | /* |
1663 | * The mmc_select_voltage fn of the core does | |
1664 | * not seem to set the power_mode to | |
1665 | * MMC_POWER_UP upon recalculating the voltage. | |
1666 | * vdd 1.8v. | |
1667 | */ | |
70a3341a DK |
1668 | if (omap_hsmmc_switch_opcond(host, ios->vdd) != 0) |
1669 | dev_dbg(mmc_dev(host->mmc), | |
a45c6cb8 MC |
1670 | "Switch operation failed\n"); |
1671 | } | |
1672 | } | |
1673 | ||
5934df2f | 1674 | omap_hsmmc_set_clock(host); |
a45c6cb8 | 1675 | |
a3621465 | 1676 | if (do_send_init_stream) |
a45c6cb8 MC |
1677 | send_init_stream(host); |
1678 | ||
3796fb8a | 1679 | omap_hsmmc_set_bus_mode(host); |
5e2ea617 | 1680 | |
fa4aa2d4 | 1681 | pm_runtime_put_autosuspend(host->dev); |
a45c6cb8 MC |
1682 | } |
1683 | ||
1684 | static int omap_hsmmc_get_cd(struct mmc_host *mmc) | |
1685 | { | |
70a3341a | 1686 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 1687 | |
b5cd43f0 | 1688 | if (!host->card_detect) |
a45c6cb8 | 1689 | return -ENOSYS; |
80412ca8 | 1690 | return host->card_detect(host->dev); |
a45c6cb8 MC |
1691 | } |
1692 | ||
1693 | static int omap_hsmmc_get_ro(struct mmc_host *mmc) | |
1694 | { | |
70a3341a | 1695 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 1696 | |
b5cd43f0 | 1697 | if (!host->get_ro) |
a45c6cb8 | 1698 | return -ENOSYS; |
80412ca8 | 1699 | return host->get_ro(host->dev); |
a45c6cb8 MC |
1700 | } |
1701 | ||
4816858c GI |
1702 | static void omap_hsmmc_init_card(struct mmc_host *mmc, struct mmc_card *card) |
1703 | { | |
1704 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1705 | ||
326119c9 AF |
1706 | if (mmc_pdata(host)->init_card) |
1707 | mmc_pdata(host)->init_card(card); | |
4816858c GI |
1708 | } |
1709 | ||
2cd3a2a5 AF |
1710 | static void omap_hsmmc_enable_sdio_irq(struct mmc_host *mmc, int enable) |
1711 | { | |
1712 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
5a52b08b | 1713 | u32 irq_mask, con; |
2cd3a2a5 AF |
1714 | unsigned long flags; |
1715 | ||
1716 | spin_lock_irqsave(&host->irq_lock, flags); | |
1717 | ||
5a52b08b | 1718 | con = OMAP_HSMMC_READ(host->base, CON); |
2cd3a2a5 AF |
1719 | irq_mask = OMAP_HSMMC_READ(host->base, ISE); |
1720 | if (enable) { | |
1721 | host->flags |= HSMMC_SDIO_IRQ_ENABLED; | |
1722 | irq_mask |= CIRQ_EN; | |
5a52b08b | 1723 | con |= CTPL | CLKEXTFREE; |
2cd3a2a5 AF |
1724 | } else { |
1725 | host->flags &= ~HSMMC_SDIO_IRQ_ENABLED; | |
1726 | irq_mask &= ~CIRQ_EN; | |
5a52b08b | 1727 | con &= ~(CTPL | CLKEXTFREE); |
2cd3a2a5 | 1728 | } |
5a52b08b | 1729 | OMAP_HSMMC_WRITE(host->base, CON, con); |
2cd3a2a5 AF |
1730 | OMAP_HSMMC_WRITE(host->base, IE, irq_mask); |
1731 | ||
1732 | /* | |
1733 | * if enable, piggy back detection on current request | |
1734 | * but always disable immediately | |
1735 | */ | |
1736 | if (!host->req_in_progress || !enable) | |
1737 | OMAP_HSMMC_WRITE(host->base, ISE, irq_mask); | |
1738 | ||
1739 | /* flush posted write */ | |
1740 | OMAP_HSMMC_READ(host->base, IE); | |
1741 | ||
1742 | spin_unlock_irqrestore(&host->irq_lock, flags); | |
1743 | } | |
1744 | ||
1745 | static int omap_hsmmc_configure_wake_irq(struct omap_hsmmc_host *host) | |
1746 | { | |
1747 | struct mmc_host *mmc = host->mmc; | |
1748 | int ret; | |
1749 | ||
1750 | /* | |
1751 | * For omaps with wake-up path, wakeirq will be irq from pinctrl and | |
1752 | * for other omaps, wakeirq will be from GPIO (dat line remuxed to | |
1753 | * gpio). wakeirq is needed to detect sdio irq in runtime suspend state | |
1754 | * with functional clock disabled. | |
1755 | */ | |
1756 | if (!host->dev->of_node || !host->wake_irq) | |
1757 | return -ENODEV; | |
1758 | ||
1759 | /* Prevent auto-enabling of IRQ */ | |
1760 | irq_set_status_flags(host->wake_irq, IRQ_NOAUTOEN); | |
1761 | ret = devm_request_irq(host->dev, host->wake_irq, omap_hsmmc_wake_irq, | |
1762 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1763 | mmc_hostname(mmc), host); | |
1764 | if (ret) { | |
1765 | dev_err(mmc_dev(host->mmc), "Unable to request wake IRQ\n"); | |
1766 | goto err; | |
1767 | } | |
1768 | ||
1769 | /* | |
1770 | * Some omaps don't have wake-up path from deeper idle states | |
1771 | * and need to remux SDIO DAT1 to GPIO for wake-up from idle. | |
1772 | */ | |
1773 | if (host->pdata->controller_flags & OMAP_HSMMC_SWAKEUP_MISSING) { | |
455e5cd6 AF |
1774 | struct pinctrl *p = devm_pinctrl_get(host->dev); |
1775 | if (!p) { | |
1776 | ret = -ENODEV; | |
1777 | goto err_free_irq; | |
1778 | } | |
1779 | if (IS_ERR(pinctrl_lookup_state(p, PINCTRL_STATE_DEFAULT))) { | |
1780 | dev_info(host->dev, "missing default pinctrl state\n"); | |
1781 | devm_pinctrl_put(p); | |
1782 | ret = -EINVAL; | |
1783 | goto err_free_irq; | |
1784 | } | |
1785 | ||
1786 | if (IS_ERR(pinctrl_lookup_state(p, PINCTRL_STATE_IDLE))) { | |
1787 | dev_info(host->dev, "missing idle pinctrl state\n"); | |
1788 | devm_pinctrl_put(p); | |
1789 | ret = -EINVAL; | |
1790 | goto err_free_irq; | |
1791 | } | |
1792 | devm_pinctrl_put(p); | |
2cd3a2a5 AF |
1793 | } |
1794 | ||
5a52b08b B |
1795 | OMAP_HSMMC_WRITE(host->base, HCTL, |
1796 | OMAP_HSMMC_READ(host->base, HCTL) | IWE); | |
2cd3a2a5 AF |
1797 | return 0; |
1798 | ||
455e5cd6 AF |
1799 | err_free_irq: |
1800 | devm_free_irq(host->dev, host->wake_irq, host); | |
2cd3a2a5 AF |
1801 | err: |
1802 | dev_warn(host->dev, "no SDIO IRQ support, falling back to polling\n"); | |
1803 | host->wake_irq = 0; | |
1804 | return ret; | |
1805 | } | |
1806 | ||
70a3341a | 1807 | static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host) |
1b331e69 KK |
1808 | { |
1809 | u32 hctl, capa, value; | |
1810 | ||
1811 | /* Only MMC1 supports 3.0V */ | |
4621d5f8 | 1812 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { |
1b331e69 KK |
1813 | hctl = SDVS30; |
1814 | capa = VS30 | VS18; | |
1815 | } else { | |
1816 | hctl = SDVS18; | |
1817 | capa = VS18; | |
1818 | } | |
1819 | ||
1820 | value = OMAP_HSMMC_READ(host->base, HCTL) & ~SDVS_MASK; | |
1821 | OMAP_HSMMC_WRITE(host->base, HCTL, value | hctl); | |
1822 | ||
1823 | value = OMAP_HSMMC_READ(host->base, CAPA); | |
1824 | OMAP_HSMMC_WRITE(host->base, CAPA, value | capa); | |
1825 | ||
1b331e69 | 1826 | /* Set SD bus power bit */ |
e13bb300 | 1827 | set_sd_bus_power(host); |
1b331e69 KK |
1828 | } |
1829 | ||
70a3341a | 1830 | static int omap_hsmmc_enable_fclk(struct mmc_host *mmc) |
dd498eff | 1831 | { |
70a3341a | 1832 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
dd498eff | 1833 | |
fa4aa2d4 B |
1834 | pm_runtime_get_sync(host->dev); |
1835 | ||
dd498eff DK |
1836 | return 0; |
1837 | } | |
1838 | ||
907d2e7c | 1839 | static int omap_hsmmc_disable_fclk(struct mmc_host *mmc) |
dd498eff | 1840 | { |
70a3341a | 1841 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
dd498eff | 1842 | |
fa4aa2d4 B |
1843 | pm_runtime_mark_last_busy(host->dev); |
1844 | pm_runtime_put_autosuspend(host->dev); | |
1845 | ||
dd498eff DK |
1846 | return 0; |
1847 | } | |
1848 | ||
afd8c29d KM |
1849 | static int omap_hsmmc_multi_io_quirk(struct mmc_card *card, |
1850 | unsigned int direction, int blk_size) | |
1851 | { | |
1852 | /* This controller can't do multiblock reads due to hw bugs */ | |
1853 | if (direction == MMC_DATA_READ) | |
1854 | return 1; | |
1855 | ||
1856 | return blk_size; | |
1857 | } | |
1858 | ||
1859 | static struct mmc_host_ops omap_hsmmc_ops = { | |
70a3341a DK |
1860 | .enable = omap_hsmmc_enable_fclk, |
1861 | .disable = omap_hsmmc_disable_fclk, | |
9782aff8 PF |
1862 | .post_req = omap_hsmmc_post_req, |
1863 | .pre_req = omap_hsmmc_pre_req, | |
70a3341a DK |
1864 | .request = omap_hsmmc_request, |
1865 | .set_ios = omap_hsmmc_set_ios, | |
dd498eff DK |
1866 | .get_cd = omap_hsmmc_get_cd, |
1867 | .get_ro = omap_hsmmc_get_ro, | |
4816858c | 1868 | .init_card = omap_hsmmc_init_card, |
2cd3a2a5 | 1869 | .enable_sdio_irq = omap_hsmmc_enable_sdio_irq, |
dd498eff DK |
1870 | }; |
1871 | ||
d900f712 DK |
1872 | #ifdef CONFIG_DEBUG_FS |
1873 | ||
70a3341a | 1874 | static int omap_hsmmc_regs_show(struct seq_file *s, void *data) |
d900f712 DK |
1875 | { |
1876 | struct mmc_host *mmc = s->private; | |
70a3341a | 1877 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
d900f712 | 1878 | |
bb0635f0 AF |
1879 | seq_printf(s, "mmc%d:\n", mmc->index); |
1880 | seq_printf(s, "sdio irq mode\t%s\n", | |
1881 | (mmc->caps & MMC_CAP_SDIO_IRQ) ? "interrupt" : "polling"); | |
5e2ea617 | 1882 | |
bb0635f0 AF |
1883 | if (mmc->caps & MMC_CAP_SDIO_IRQ) { |
1884 | seq_printf(s, "sdio irq \t%s\n", | |
1885 | (host->flags & HSMMC_SDIO_IRQ_ENABLED) ? "enabled" | |
1886 | : "disabled"); | |
1887 | } | |
1888 | seq_printf(s, "ctx_loss:\t%d\n", host->context_loss); | |
d900f712 | 1889 | |
bb0635f0 AF |
1890 | pm_runtime_get_sync(host->dev); |
1891 | seq_puts(s, "\nregs:\n"); | |
d900f712 DK |
1892 | seq_printf(s, "CON:\t\t0x%08x\n", |
1893 | OMAP_HSMMC_READ(host->base, CON)); | |
bb0635f0 AF |
1894 | seq_printf(s, "PSTATE:\t\t0x%08x\n", |
1895 | OMAP_HSMMC_READ(host->base, PSTATE)); | |
d900f712 DK |
1896 | seq_printf(s, "HCTL:\t\t0x%08x\n", |
1897 | OMAP_HSMMC_READ(host->base, HCTL)); | |
1898 | seq_printf(s, "SYSCTL:\t\t0x%08x\n", | |
1899 | OMAP_HSMMC_READ(host->base, SYSCTL)); | |
1900 | seq_printf(s, "IE:\t\t0x%08x\n", | |
1901 | OMAP_HSMMC_READ(host->base, IE)); | |
1902 | seq_printf(s, "ISE:\t\t0x%08x\n", | |
1903 | OMAP_HSMMC_READ(host->base, ISE)); | |
1904 | seq_printf(s, "CAPA:\t\t0x%08x\n", | |
1905 | OMAP_HSMMC_READ(host->base, CAPA)); | |
5e2ea617 | 1906 | |
fa4aa2d4 B |
1907 | pm_runtime_mark_last_busy(host->dev); |
1908 | pm_runtime_put_autosuspend(host->dev); | |
dd498eff | 1909 | |
d900f712 DK |
1910 | return 0; |
1911 | } | |
1912 | ||
70a3341a | 1913 | static int omap_hsmmc_regs_open(struct inode *inode, struct file *file) |
d900f712 | 1914 | { |
70a3341a | 1915 | return single_open(file, omap_hsmmc_regs_show, inode->i_private); |
d900f712 DK |
1916 | } |
1917 | ||
1918 | static const struct file_operations mmc_regs_fops = { | |
70a3341a | 1919 | .open = omap_hsmmc_regs_open, |
d900f712 DK |
1920 | .read = seq_read, |
1921 | .llseek = seq_lseek, | |
1922 | .release = single_release, | |
1923 | }; | |
1924 | ||
70a3341a | 1925 | static void omap_hsmmc_debugfs(struct mmc_host *mmc) |
d900f712 DK |
1926 | { |
1927 | if (mmc->debugfs_root) | |
1928 | debugfs_create_file("regs", S_IRUSR, mmc->debugfs_root, | |
1929 | mmc, &mmc_regs_fops); | |
1930 | } | |
1931 | ||
1932 | #else | |
1933 | ||
70a3341a | 1934 | static void omap_hsmmc_debugfs(struct mmc_host *mmc) |
d900f712 DK |
1935 | { |
1936 | } | |
1937 | ||
1938 | #endif | |
1939 | ||
46856a68 | 1940 | #ifdef CONFIG_OF |
59445b10 NM |
1941 | static const struct omap_mmc_of_data omap3_pre_es3_mmc_of_data = { |
1942 | /* See 35xx errata 2.1.1.128 in SPRZ278F */ | |
1943 | .controller_flags = OMAP_HSMMC_BROKEN_MULTIBLOCK_READ, | |
1944 | }; | |
1945 | ||
1946 | static const struct omap_mmc_of_data omap4_mmc_of_data = { | |
1947 | .reg_offset = 0x100, | |
1948 | }; | |
2cd3a2a5 AF |
1949 | static const struct omap_mmc_of_data am33xx_mmc_of_data = { |
1950 | .reg_offset = 0x100, | |
1951 | .controller_flags = OMAP_HSMMC_SWAKEUP_MISSING, | |
1952 | }; | |
46856a68 RN |
1953 | |
1954 | static const struct of_device_id omap_mmc_of_match[] = { | |
1955 | { | |
1956 | .compatible = "ti,omap2-hsmmc", | |
1957 | }, | |
59445b10 NM |
1958 | { |
1959 | .compatible = "ti,omap3-pre-es3-hsmmc", | |
1960 | .data = &omap3_pre_es3_mmc_of_data, | |
1961 | }, | |
46856a68 RN |
1962 | { |
1963 | .compatible = "ti,omap3-hsmmc", | |
1964 | }, | |
1965 | { | |
1966 | .compatible = "ti,omap4-hsmmc", | |
59445b10 | 1967 | .data = &omap4_mmc_of_data, |
46856a68 | 1968 | }, |
2cd3a2a5 AF |
1969 | { |
1970 | .compatible = "ti,am33xx-hsmmc", | |
1971 | .data = &am33xx_mmc_of_data, | |
1972 | }, | |
46856a68 | 1973 | {}, |
b6d085f6 | 1974 | }; |
46856a68 RN |
1975 | MODULE_DEVICE_TABLE(of, omap_mmc_of_match); |
1976 | ||
55143438 | 1977 | static struct omap_hsmmc_platform_data *of_get_hsmmc_pdata(struct device *dev) |
46856a68 | 1978 | { |
55143438 | 1979 | struct omap_hsmmc_platform_data *pdata; |
46856a68 | 1980 | struct device_node *np = dev->of_node; |
d8714e87 | 1981 | u32 bus_width, max_freq; |
dc642c28 JL |
1982 | int cd_gpio, wp_gpio; |
1983 | ||
1984 | cd_gpio = of_get_named_gpio(np, "cd-gpios", 0); | |
1985 | wp_gpio = of_get_named_gpio(np, "wp-gpios", 0); | |
1986 | if (cd_gpio == -EPROBE_DEFER || wp_gpio == -EPROBE_DEFER) | |
1987 | return ERR_PTR(-EPROBE_DEFER); | |
46856a68 RN |
1988 | |
1989 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
1990 | if (!pdata) | |
19df45bc | 1991 | return ERR_PTR(-ENOMEM); /* out of memory */ |
46856a68 RN |
1992 | |
1993 | if (of_find_property(np, "ti,dual-volt", NULL)) | |
1994 | pdata->controller_flags |= OMAP_HSMMC_SUPPORTS_DUAL_VOLT; | |
1995 | ||
326119c9 AF |
1996 | pdata->switch_pin = cd_gpio; |
1997 | pdata->gpio_wp = wp_gpio; | |
46856a68 RN |
1998 | |
1999 | if (of_find_property(np, "ti,non-removable", NULL)) { | |
326119c9 AF |
2000 | pdata->nonremovable = true; |
2001 | pdata->no_regulator_off_init = true; | |
46856a68 | 2002 | } |
7f217794 | 2003 | of_property_read_u32(np, "bus-width", &bus_width); |
46856a68 | 2004 | if (bus_width == 4) |
326119c9 | 2005 | pdata->caps |= MMC_CAP_4_BIT_DATA; |
46856a68 | 2006 | else if (bus_width == 8) |
326119c9 | 2007 | pdata->caps |= MMC_CAP_8_BIT_DATA; |
46856a68 RN |
2008 | |
2009 | if (of_find_property(np, "ti,needs-special-reset", NULL)) | |
326119c9 | 2010 | pdata->features |= HSMMC_HAS_UPDATED_RESET; |
46856a68 | 2011 | |
d8714e87 DM |
2012 | if (!of_property_read_u32(np, "max-frequency", &max_freq)) |
2013 | pdata->max_freq = max_freq; | |
2014 | ||
cd587096 | 2015 | if (of_find_property(np, "ti,needs-special-hs-handling", NULL)) |
326119c9 | 2016 | pdata->features |= HSMMC_HAS_HSPE_SUPPORT; |
cd587096 | 2017 | |
c9ae64db | 2018 | if (of_find_property(np, "keep-power-in-suspend", NULL)) |
326119c9 | 2019 | pdata->pm_caps |= MMC_PM_KEEP_POWER; |
c9ae64db DM |
2020 | |
2021 | if (of_find_property(np, "enable-sdio-wakeup", NULL)) | |
326119c9 | 2022 | pdata->pm_caps |= MMC_PM_WAKE_SDIO_IRQ; |
c9ae64db | 2023 | |
46856a68 RN |
2024 | return pdata; |
2025 | } | |
2026 | #else | |
55143438 | 2027 | static inline struct omap_hsmmc_platform_data |
46856a68 RN |
2028 | *of_get_hsmmc_pdata(struct device *dev) |
2029 | { | |
19df45bc | 2030 | return ERR_PTR(-EINVAL); |
46856a68 RN |
2031 | } |
2032 | #endif | |
2033 | ||
c3be1efd | 2034 | static int omap_hsmmc_probe(struct platform_device *pdev) |
a45c6cb8 | 2035 | { |
55143438 | 2036 | struct omap_hsmmc_platform_data *pdata = pdev->dev.platform_data; |
a45c6cb8 | 2037 | struct mmc_host *mmc; |
70a3341a | 2038 | struct omap_hsmmc_host *host = NULL; |
a45c6cb8 | 2039 | struct resource *res; |
db0fefc5 | 2040 | int ret, irq; |
46856a68 | 2041 | const struct of_device_id *match; |
26b88520 RK |
2042 | dma_cap_mask_t mask; |
2043 | unsigned tx_req, rx_req; | |
59445b10 | 2044 | const struct omap_mmc_of_data *data; |
77fae219 | 2045 | void __iomem *base; |
46856a68 RN |
2046 | |
2047 | match = of_match_device(of_match_ptr(omap_mmc_of_match), &pdev->dev); | |
2048 | if (match) { | |
2049 | pdata = of_get_hsmmc_pdata(&pdev->dev); | |
dc642c28 JL |
2050 | |
2051 | if (IS_ERR(pdata)) | |
2052 | return PTR_ERR(pdata); | |
2053 | ||
46856a68 | 2054 | if (match->data) { |
59445b10 NM |
2055 | data = match->data; |
2056 | pdata->reg_offset = data->reg_offset; | |
2057 | pdata->controller_flags |= data->controller_flags; | |
46856a68 RN |
2058 | } |
2059 | } | |
a45c6cb8 MC |
2060 | |
2061 | if (pdata == NULL) { | |
2062 | dev_err(&pdev->dev, "Platform Data is missing\n"); | |
2063 | return -ENXIO; | |
2064 | } | |
2065 | ||
a45c6cb8 MC |
2066 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
2067 | irq = platform_get_irq(pdev, 0); | |
2068 | if (res == NULL || irq < 0) | |
2069 | return -ENXIO; | |
2070 | ||
77fae219 B |
2071 | base = devm_ioremap_resource(&pdev->dev, res); |
2072 | if (IS_ERR(base)) | |
2073 | return PTR_ERR(base); | |
a45c6cb8 | 2074 | |
70a3341a | 2075 | mmc = mmc_alloc_host(sizeof(struct omap_hsmmc_host), &pdev->dev); |
a45c6cb8 MC |
2076 | if (!mmc) { |
2077 | ret = -ENOMEM; | |
1e363e3b | 2078 | goto err; |
a45c6cb8 MC |
2079 | } |
2080 | ||
2081 | host = mmc_priv(mmc); | |
2082 | host->mmc = mmc; | |
2083 | host->pdata = pdata; | |
2084 | host->dev = &pdev->dev; | |
2085 | host->use_dma = 1; | |
a45c6cb8 MC |
2086 | host->dma_ch = -1; |
2087 | host->irq = irq; | |
fc307df8 | 2088 | host->mapbase = res->start + pdata->reg_offset; |
77fae219 | 2089 | host->base = base + pdata->reg_offset; |
6da20c89 | 2090 | host->power_mode = MMC_POWER_OFF; |
9782aff8 | 2091 | host->next_data.cookie = 1; |
e99448ff | 2092 | host->pbias_enabled = 0; |
a45c6cb8 | 2093 | |
1e363e3b AF |
2094 | ret = omap_hsmmc_gpio_init(host, pdata); |
2095 | if (ret) | |
2096 | goto err_gpio; | |
2097 | ||
a45c6cb8 | 2098 | platform_set_drvdata(pdev, host); |
a45c6cb8 | 2099 | |
2cd3a2a5 AF |
2100 | if (pdev->dev.of_node) |
2101 | host->wake_irq = irq_of_parse_and_map(pdev->dev.of_node, 1); | |
2102 | ||
7a8c2cef | 2103 | mmc->ops = &omap_hsmmc_ops; |
dd498eff | 2104 | |
d418ed87 DM |
2105 | mmc->f_min = OMAP_MMC_MIN_CLOCK; |
2106 | ||
2107 | if (pdata->max_freq > 0) | |
2108 | mmc->f_max = pdata->max_freq; | |
2109 | else | |
2110 | mmc->f_max = OMAP_MMC_MAX_CLOCK; | |
a45c6cb8 | 2111 | |
4dffd7a2 | 2112 | spin_lock_init(&host->irq_lock); |
a45c6cb8 | 2113 | |
9618195e | 2114 | host->fclk = devm_clk_get(&pdev->dev, "fck"); |
a45c6cb8 MC |
2115 | if (IS_ERR(host->fclk)) { |
2116 | ret = PTR_ERR(host->fclk); | |
2117 | host->fclk = NULL; | |
a45c6cb8 MC |
2118 | goto err1; |
2119 | } | |
2120 | ||
9b68256c PW |
2121 | if (host->pdata->controller_flags & OMAP_HSMMC_BROKEN_MULTIBLOCK_READ) { |
2122 | dev_info(&pdev->dev, "multiblock reads disabled due to 35xx erratum 2.1.1.128; MMC read performance may suffer\n"); | |
afd8c29d | 2123 | omap_hsmmc_ops.multi_io_quirk = omap_hsmmc_multi_io_quirk; |
9b68256c | 2124 | } |
dd498eff | 2125 | |
fa4aa2d4 B |
2126 | pm_runtime_enable(host->dev); |
2127 | pm_runtime_get_sync(host->dev); | |
2128 | pm_runtime_set_autosuspend_delay(host->dev, MMC_AUTOSUSPEND_DELAY); | |
2129 | pm_runtime_use_autosuspend(host->dev); | |
a45c6cb8 | 2130 | |
92a3aebf B |
2131 | omap_hsmmc_context_save(host); |
2132 | ||
9618195e | 2133 | host->dbclk = devm_clk_get(&pdev->dev, "mmchsdb_fck"); |
cd03d9a8 RN |
2134 | /* |
2135 | * MMC can still work without debounce clock. | |
2136 | */ | |
2137 | if (IS_ERR(host->dbclk)) { | |
cd03d9a8 | 2138 | host->dbclk = NULL; |
94c18149 | 2139 | } else if (clk_prepare_enable(host->dbclk) != 0) { |
cd03d9a8 | 2140 | dev_warn(mmc_dev(host->mmc), "Failed to enable debounce clk\n"); |
cd03d9a8 | 2141 | host->dbclk = NULL; |
2bec0893 | 2142 | } |
a45c6cb8 | 2143 | |
0ccd76d4 JY |
2144 | /* Since we do only SG emulation, we can have as many segs |
2145 | * as we want. */ | |
a36274e0 | 2146 | mmc->max_segs = 1024; |
0ccd76d4 | 2147 | |
a45c6cb8 MC |
2148 | mmc->max_blk_size = 512; /* Block Length at max can be 1024 */ |
2149 | mmc->max_blk_count = 0xFFFF; /* No. of Blocks is 16 bits */ | |
2150 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; | |
2151 | mmc->max_seg_size = mmc->max_req_size; | |
2152 | ||
13189e78 | 2153 | mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED | |
93caf8e6 | 2154 | MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_ERASE; |
a45c6cb8 | 2155 | |
326119c9 | 2156 | mmc->caps |= mmc_pdata(host)->caps; |
3a63833e | 2157 | if (mmc->caps & MMC_CAP_8_BIT_DATA) |
a45c6cb8 MC |
2158 | mmc->caps |= MMC_CAP_4_BIT_DATA; |
2159 | ||
326119c9 | 2160 | if (mmc_pdata(host)->nonremovable) |
23d99bb9 AH |
2161 | mmc->caps |= MMC_CAP_NONREMOVABLE; |
2162 | ||
326119c9 | 2163 | mmc->pm_caps = mmc_pdata(host)->pm_caps; |
6fdc75de | 2164 | |
70a3341a | 2165 | omap_hsmmc_conf_bus_power(host); |
a45c6cb8 | 2166 | |
4a29b559 SS |
2167 | if (!pdev->dev.of_node) { |
2168 | res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx"); | |
2169 | if (!res) { | |
2170 | dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n"); | |
2171 | ret = -ENXIO; | |
2172 | goto err_irq; | |
2173 | } | |
2174 | tx_req = res->start; | |
b7bf773b | 2175 | |
4a29b559 SS |
2176 | res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx"); |
2177 | if (!res) { | |
2178 | dev_err(mmc_dev(host->mmc), "cannot get DMA RX channel\n"); | |
2179 | ret = -ENXIO; | |
2180 | goto err_irq; | |
2181 | } | |
2182 | rx_req = res->start; | |
f3e2f1dd | 2183 | } |
a45c6cb8 | 2184 | |
26b88520 RK |
2185 | dma_cap_zero(mask); |
2186 | dma_cap_set(DMA_SLAVE, mask); | |
2187 | ||
d272fbf0 MP |
2188 | host->rx_chan = |
2189 | dma_request_slave_channel_compat(mask, omap_dma_filter_fn, | |
2190 | &rx_req, &pdev->dev, "rx"); | |
2191 | ||
26b88520 RK |
2192 | if (!host->rx_chan) { |
2193 | dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel %u\n", rx_req); | |
04e8c7bc | 2194 | ret = -ENXIO; |
26b88520 RK |
2195 | goto err_irq; |
2196 | } | |
2197 | ||
d272fbf0 MP |
2198 | host->tx_chan = |
2199 | dma_request_slave_channel_compat(mask, omap_dma_filter_fn, | |
2200 | &tx_req, &pdev->dev, "tx"); | |
2201 | ||
26b88520 RK |
2202 | if (!host->tx_chan) { |
2203 | dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel %u\n", tx_req); | |
04e8c7bc | 2204 | ret = -ENXIO; |
26b88520 | 2205 | goto err_irq; |
c5c98927 | 2206 | } |
a45c6cb8 MC |
2207 | |
2208 | /* Request IRQ for MMC operations */ | |
e1538ed7 | 2209 | ret = devm_request_irq(&pdev->dev, host->irq, omap_hsmmc_irq, 0, |
a45c6cb8 MC |
2210 | mmc_hostname(mmc), host); |
2211 | if (ret) { | |
b1e056ae | 2212 | dev_err(mmc_dev(host->mmc), "Unable to grab HSMMC IRQ\n"); |
a45c6cb8 MC |
2213 | goto err_irq; |
2214 | } | |
2215 | ||
326119c9 | 2216 | if (omap_hsmmc_have_reg() && !mmc_pdata(host)->set_power) { |
db0fefc5 AH |
2217 | ret = omap_hsmmc_reg_get(host); |
2218 | if (ret) | |
bb09d151 | 2219 | goto err_irq; |
db0fefc5 AH |
2220 | host->use_reg = 1; |
2221 | } | |
2222 | ||
326119c9 | 2223 | mmc->ocr_avail = mmc_pdata(host)->ocr_mask; |
a45c6cb8 MC |
2224 | |
2225 | /* Request IRQ for card detect */ | |
b5cd43f0 | 2226 | if (host->card_detect_irq) { |
9fa0e05e | 2227 | ret = devm_request_threaded_irq(&pdev->dev, |
b5cd43f0 | 2228 | host->card_detect_irq, |
9fa0e05e | 2229 | NULL, omap_hsmmc_detect, |
db35f83e | 2230 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
7efab4f3 | 2231 | mmc_hostname(mmc), host); |
a45c6cb8 | 2232 | if (ret) { |
b1e056ae | 2233 | dev_err(mmc_dev(host->mmc), |
a45c6cb8 MC |
2234 | "Unable to grab MMC CD IRQ\n"); |
2235 | goto err_irq_cd; | |
2236 | } | |
b5cd43f0 AF |
2237 | host->suspend = omap_hsmmc_suspend_cdirq; |
2238 | host->resume = omap_hsmmc_resume_cdirq; | |
a45c6cb8 MC |
2239 | } |
2240 | ||
b417577d | 2241 | omap_hsmmc_disable_irq(host); |
a45c6cb8 | 2242 | |
2cd3a2a5 AF |
2243 | /* |
2244 | * For now, only support SDIO interrupt if we have a separate | |
2245 | * wake-up interrupt configured from device tree. This is because | |
2246 | * the wake-up interrupt is needed for idle state and some | |
2247 | * platforms need special quirks. And we don't want to add new | |
2248 | * legacy mux platform init code callbacks any longer as we | |
2249 | * are moving to DT based booting anyways. | |
2250 | */ | |
2251 | ret = omap_hsmmc_configure_wake_irq(host); | |
2252 | if (!ret) | |
2253 | mmc->caps |= MMC_CAP_SDIO_IRQ; | |
2254 | ||
b62f6228 AH |
2255 | omap_hsmmc_protect_card(host); |
2256 | ||
a45c6cb8 MC |
2257 | mmc_add_host(mmc); |
2258 | ||
326119c9 | 2259 | if (mmc_pdata(host)->name != NULL) { |
a45c6cb8 MC |
2260 | ret = device_create_file(&mmc->class_dev, &dev_attr_slot_name); |
2261 | if (ret < 0) | |
2262 | goto err_slot_name; | |
2263 | } | |
b5cd43f0 | 2264 | if (host->card_detect_irq && host->get_cover_state) { |
a45c6cb8 MC |
2265 | ret = device_create_file(&mmc->class_dev, |
2266 | &dev_attr_cover_switch); | |
2267 | if (ret < 0) | |
db0fefc5 | 2268 | goto err_slot_name; |
a45c6cb8 MC |
2269 | } |
2270 | ||
70a3341a | 2271 | omap_hsmmc_debugfs(mmc); |
fa4aa2d4 B |
2272 | pm_runtime_mark_last_busy(host->dev); |
2273 | pm_runtime_put_autosuspend(host->dev); | |
d900f712 | 2274 | |
a45c6cb8 MC |
2275 | return 0; |
2276 | ||
a45c6cb8 MC |
2277 | err_slot_name: |
2278 | mmc_remove_host(mmc); | |
db0fefc5 AH |
2279 | err_irq_cd: |
2280 | if (host->use_reg) | |
2281 | omap_hsmmc_reg_put(host); | |
a45c6cb8 | 2282 | err_irq: |
c5c98927 RK |
2283 | if (host->tx_chan) |
2284 | dma_release_channel(host->tx_chan); | |
2285 | if (host->rx_chan) | |
2286 | dma_release_channel(host->rx_chan); | |
d59d77ed | 2287 | pm_runtime_put_sync(host->dev); |
37f6190d | 2288 | pm_runtime_disable(host->dev); |
9618195e | 2289 | if (host->dbclk) |
94c18149 | 2290 | clk_disable_unprepare(host->dbclk); |
a45c6cb8 | 2291 | err1: |
1e363e3b AF |
2292 | omap_hsmmc_gpio_free(host, pdata); |
2293 | err_gpio: | |
db0fefc5 | 2294 | mmc_free_host(mmc); |
a45c6cb8 | 2295 | err: |
a45c6cb8 MC |
2296 | return ret; |
2297 | } | |
2298 | ||
6e0ee714 | 2299 | static int omap_hsmmc_remove(struct platform_device *pdev) |
a45c6cb8 | 2300 | { |
70a3341a | 2301 | struct omap_hsmmc_host *host = platform_get_drvdata(pdev); |
a45c6cb8 | 2302 | |
927ce944 FB |
2303 | pm_runtime_get_sync(host->dev); |
2304 | mmc_remove_host(host->mmc); | |
2305 | if (host->use_reg) | |
2306 | omap_hsmmc_reg_put(host); | |
a45c6cb8 | 2307 | |
c5c98927 RK |
2308 | if (host->tx_chan) |
2309 | dma_release_channel(host->tx_chan); | |
2310 | if (host->rx_chan) | |
2311 | dma_release_channel(host->rx_chan); | |
2312 | ||
927ce944 FB |
2313 | pm_runtime_put_sync(host->dev); |
2314 | pm_runtime_disable(host->dev); | |
9618195e | 2315 | if (host->dbclk) |
94c18149 | 2316 | clk_disable_unprepare(host->dbclk); |
a45c6cb8 | 2317 | |
1e363e3b | 2318 | omap_hsmmc_gpio_free(host, host->pdata); |
9d1f0286 | 2319 | mmc_free_host(host->mmc); |
927ce944 | 2320 | |
a45c6cb8 MC |
2321 | return 0; |
2322 | } | |
2323 | ||
2324 | #ifdef CONFIG_PM | |
a48ce884 FB |
2325 | static int omap_hsmmc_prepare(struct device *dev) |
2326 | { | |
2327 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); | |
2328 | ||
b5cd43f0 | 2329 | if (host->suspend) |
80412ca8 | 2330 | return host->suspend(dev); |
a48ce884 FB |
2331 | |
2332 | return 0; | |
2333 | } | |
2334 | ||
2335 | static void omap_hsmmc_complete(struct device *dev) | |
2336 | { | |
2337 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); | |
2338 | ||
b5cd43f0 | 2339 | if (host->resume) |
80412ca8 | 2340 | host->resume(dev); |
a48ce884 FB |
2341 | |
2342 | } | |
2343 | ||
a791daa1 | 2344 | static int omap_hsmmc_suspend(struct device *dev) |
a45c6cb8 | 2345 | { |
927ce944 | 2346 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); |
a45c6cb8 | 2347 | |
927ce944 | 2348 | if (!host) |
a45c6cb8 MC |
2349 | return 0; |
2350 | ||
927ce944 | 2351 | pm_runtime_get_sync(host->dev); |
31f9d463 | 2352 | |
927ce944 | 2353 | if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) { |
2cd3a2a5 AF |
2354 | OMAP_HSMMC_WRITE(host->base, ISE, 0); |
2355 | OMAP_HSMMC_WRITE(host->base, IE, 0); | |
2356 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); | |
927ce944 FB |
2357 | OMAP_HSMMC_WRITE(host->base, HCTL, |
2358 | OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP); | |
a45c6cb8 | 2359 | } |
927ce944 | 2360 | |
2cd3a2a5 AF |
2361 | /* do not wake up due to sdio irq */ |
2362 | if ((host->mmc->caps & MMC_CAP_SDIO_IRQ) && | |
2363 | !(host->mmc->pm_flags & MMC_PM_WAKE_SDIO_IRQ)) | |
2364 | disable_irq(host->wake_irq); | |
2365 | ||
cd03d9a8 | 2366 | if (host->dbclk) |
94c18149 | 2367 | clk_disable_unprepare(host->dbclk); |
3932afd5 | 2368 | |
31f9d463 | 2369 | pm_runtime_put_sync(host->dev); |
3932afd5 | 2370 | return 0; |
a45c6cb8 MC |
2371 | } |
2372 | ||
2373 | /* Routine to resume the MMC device */ | |
a791daa1 | 2374 | static int omap_hsmmc_resume(struct device *dev) |
a45c6cb8 | 2375 | { |
927ce944 FB |
2376 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); |
2377 | ||
2378 | if (!host) | |
2379 | return 0; | |
a45c6cb8 | 2380 | |
927ce944 | 2381 | pm_runtime_get_sync(host->dev); |
11dd62a7 | 2382 | |
cd03d9a8 | 2383 | if (host->dbclk) |
94c18149 | 2384 | clk_prepare_enable(host->dbclk); |
2bec0893 | 2385 | |
927ce944 FB |
2386 | if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) |
2387 | omap_hsmmc_conf_bus_power(host); | |
1b331e69 | 2388 | |
927ce944 | 2389 | omap_hsmmc_protect_card(host); |
b62f6228 | 2390 | |
2cd3a2a5 AF |
2391 | if ((host->mmc->caps & MMC_CAP_SDIO_IRQ) && |
2392 | !(host->mmc->pm_flags & MMC_PM_WAKE_SDIO_IRQ)) | |
2393 | enable_irq(host->wake_irq); | |
2394 | ||
927ce944 FB |
2395 | pm_runtime_mark_last_busy(host->dev); |
2396 | pm_runtime_put_autosuspend(host->dev); | |
3932afd5 | 2397 | return 0; |
a45c6cb8 MC |
2398 | } |
2399 | ||
2400 | #else | |
a48ce884 FB |
2401 | #define omap_hsmmc_prepare NULL |
2402 | #define omap_hsmmc_complete NULL | |
70a3341a | 2403 | #define omap_hsmmc_suspend NULL |
a48ce884 | 2404 | #define omap_hsmmc_resume NULL |
a45c6cb8 MC |
2405 | #endif |
2406 | ||
fa4aa2d4 B |
2407 | static int omap_hsmmc_runtime_suspend(struct device *dev) |
2408 | { | |
2409 | struct omap_hsmmc_host *host; | |
2cd3a2a5 | 2410 | unsigned long flags; |
f945901f | 2411 | int ret = 0; |
fa4aa2d4 B |
2412 | |
2413 | host = platform_get_drvdata(to_platform_device(dev)); | |
2414 | omap_hsmmc_context_save(host); | |
927ce944 | 2415 | dev_dbg(dev, "disabled\n"); |
fa4aa2d4 | 2416 | |
2cd3a2a5 AF |
2417 | spin_lock_irqsave(&host->irq_lock, flags); |
2418 | if ((host->mmc->caps & MMC_CAP_SDIO_IRQ) && | |
2419 | (host->flags & HSMMC_SDIO_IRQ_ENABLED)) { | |
2420 | /* disable sdio irq handling to prevent race */ | |
2421 | OMAP_HSMMC_WRITE(host->base, ISE, 0); | |
2422 | OMAP_HSMMC_WRITE(host->base, IE, 0); | |
f945901f AF |
2423 | |
2424 | if (!(OMAP_HSMMC_READ(host->base, PSTATE) & DLEV_DAT(1))) { | |
2425 | /* | |
2426 | * dat1 line low, pending sdio irq | |
2427 | * race condition: possible irq handler running on | |
2428 | * multi-core, abort | |
2429 | */ | |
2430 | dev_dbg(dev, "pending sdio irq, abort suspend\n"); | |
2431 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); | |
2432 | OMAP_HSMMC_WRITE(host->base, ISE, CIRQ_EN); | |
2433 | OMAP_HSMMC_WRITE(host->base, IE, CIRQ_EN); | |
2434 | pm_runtime_mark_last_busy(dev); | |
2435 | ret = -EBUSY; | |
2436 | goto abort; | |
2437 | } | |
2cd3a2a5 | 2438 | |
97978a44 AF |
2439 | pinctrl_pm_select_idle_state(dev); |
2440 | ||
2cd3a2a5 AF |
2441 | WARN_ON(host->flags & HSMMC_WAKE_IRQ_ENABLED); |
2442 | enable_irq(host->wake_irq); | |
2443 | host->flags |= HSMMC_WAKE_IRQ_ENABLED; | |
97978a44 AF |
2444 | } else { |
2445 | pinctrl_pm_select_idle_state(dev); | |
2cd3a2a5 | 2446 | } |
97978a44 | 2447 | |
f945901f | 2448 | abort: |
2cd3a2a5 | 2449 | spin_unlock_irqrestore(&host->irq_lock, flags); |
f945901f | 2450 | return ret; |
fa4aa2d4 B |
2451 | } |
2452 | ||
2453 | static int omap_hsmmc_runtime_resume(struct device *dev) | |
2454 | { | |
2455 | struct omap_hsmmc_host *host; | |
2cd3a2a5 | 2456 | unsigned long flags; |
fa4aa2d4 B |
2457 | |
2458 | host = platform_get_drvdata(to_platform_device(dev)); | |
2459 | omap_hsmmc_context_restore(host); | |
927ce944 | 2460 | dev_dbg(dev, "enabled\n"); |
fa4aa2d4 | 2461 | |
2cd3a2a5 AF |
2462 | spin_lock_irqsave(&host->irq_lock, flags); |
2463 | if ((host->mmc->caps & MMC_CAP_SDIO_IRQ) && | |
2464 | (host->flags & HSMMC_SDIO_IRQ_ENABLED)) { | |
2465 | /* sdio irq flag can't change while in runtime suspend */ | |
2466 | if (host->flags & HSMMC_WAKE_IRQ_ENABLED) { | |
2467 | disable_irq_nosync(host->wake_irq); | |
2468 | host->flags &= ~HSMMC_WAKE_IRQ_ENABLED; | |
2469 | } | |
2470 | ||
97978a44 AF |
2471 | pinctrl_pm_select_default_state(host->dev); |
2472 | ||
2473 | /* irq lost, if pinmux incorrect */ | |
2cd3a2a5 AF |
2474 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); |
2475 | OMAP_HSMMC_WRITE(host->base, ISE, CIRQ_EN); | |
2476 | OMAP_HSMMC_WRITE(host->base, IE, CIRQ_EN); | |
97978a44 AF |
2477 | } else { |
2478 | pinctrl_pm_select_default_state(host->dev); | |
2cd3a2a5 AF |
2479 | } |
2480 | spin_unlock_irqrestore(&host->irq_lock, flags); | |
fa4aa2d4 B |
2481 | return 0; |
2482 | } | |
2483 | ||
a791daa1 | 2484 | static struct dev_pm_ops omap_hsmmc_dev_pm_ops = { |
70a3341a DK |
2485 | .suspend = omap_hsmmc_suspend, |
2486 | .resume = omap_hsmmc_resume, | |
a48ce884 FB |
2487 | .prepare = omap_hsmmc_prepare, |
2488 | .complete = omap_hsmmc_complete, | |
fa4aa2d4 B |
2489 | .runtime_suspend = omap_hsmmc_runtime_suspend, |
2490 | .runtime_resume = omap_hsmmc_runtime_resume, | |
a791daa1 KH |
2491 | }; |
2492 | ||
2493 | static struct platform_driver omap_hsmmc_driver = { | |
efa25fd3 | 2494 | .probe = omap_hsmmc_probe, |
0433c143 | 2495 | .remove = omap_hsmmc_remove, |
a45c6cb8 MC |
2496 | .driver = { |
2497 | .name = DRIVER_NAME, | |
a791daa1 | 2498 | .pm = &omap_hsmmc_dev_pm_ops, |
46856a68 | 2499 | .of_match_table = of_match_ptr(omap_mmc_of_match), |
a45c6cb8 MC |
2500 | }, |
2501 | }; | |
2502 | ||
b796450b | 2503 | module_platform_driver(omap_hsmmc_driver); |
a45c6cb8 MC |
2504 | MODULE_DESCRIPTION("OMAP High Speed Multimedia Card driver"); |
2505 | MODULE_LICENSE("GPL"); | |
2506 | MODULE_ALIAS("platform:" DRIVER_NAME); | |
2507 | MODULE_AUTHOR("Texas Instruments Inc"); |