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Commit | Line | Data |
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1da177e4 | 1 | /* |
70f10482 | 2 | * linux/drivers/mmc/host/mmci.c - ARM PrimeCell MMCI PL180/1 driver |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved. | |
c8ebae37 | 5 | * Copyright (C) 2010 ST-Ericsson SA |
1da177e4 LT |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
1da177e4 LT |
11 | #include <linux/module.h> |
12 | #include <linux/moduleparam.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/ioport.h> | |
15 | #include <linux/device.h> | |
ef289982 | 16 | #include <linux/io.h> |
1da177e4 | 17 | #include <linux/interrupt.h> |
613b152c | 18 | #include <linux/kernel.h> |
000bc9d5 | 19 | #include <linux/slab.h> |
1da177e4 LT |
20 | #include <linux/delay.h> |
21 | #include <linux/err.h> | |
22 | #include <linux/highmem.h> | |
019a5f56 | 23 | #include <linux/log2.h> |
70be208f | 24 | #include <linux/mmc/pm.h> |
1da177e4 | 25 | #include <linux/mmc/host.h> |
34177802 | 26 | #include <linux/mmc/card.h> |
d2762090 | 27 | #include <linux/mmc/slot-gpio.h> |
a62c80e5 | 28 | #include <linux/amba/bus.h> |
f8ce2547 | 29 | #include <linux/clk.h> |
bd6dee6f | 30 | #include <linux/scatterlist.h> |
89001446 | 31 | #include <linux/gpio.h> |
9a597016 | 32 | #include <linux/of_gpio.h> |
34e84f39 | 33 | #include <linux/regulator/consumer.h> |
c8ebae37 RK |
34 | #include <linux/dmaengine.h> |
35 | #include <linux/dma-mapping.h> | |
36 | #include <linux/amba/mmci.h> | |
1c3be369 | 37 | #include <linux/pm_runtime.h> |
258aea76 | 38 | #include <linux/types.h> |
a9a83785 | 39 | #include <linux/pinctrl/consumer.h> |
1da177e4 | 40 | |
7b09cdac | 41 | #include <asm/div64.h> |
1da177e4 | 42 | #include <asm/io.h> |
c6b8fdad | 43 | #include <asm/sizes.h> |
1da177e4 LT |
44 | |
45 | #include "mmci.h" | |
9cb15142 | 46 | #include "mmci_qcom_dml.h" |
1da177e4 LT |
47 | |
48 | #define DRIVER_NAME "mmci-pl18x" | |
49 | ||
1da177e4 LT |
50 | static unsigned int fmax = 515633; |
51 | ||
4956e109 RV |
52 | /** |
53 | * struct variant_data - MMCI variant-specific quirks | |
54 | * @clkreg: default value for MCICLOCK register | |
4380c14f | 55 | * @clkreg_enable: enable value for MMCICLOCK register |
e1412d85 | 56 | * @clkreg_8bit_bus_enable: enable value for 8 bit bus |
e8740644 | 57 | * @clkreg_neg_edge_enable: enable value for inverted data/cmd output |
08458ef6 | 58 | * @datalength_bits: number of bits in the MMCIDATALENGTH register |
8301bb68 RV |
59 | * @fifosize: number of bytes that can be written when MMCI_TXFIFOEMPTY |
60 | * is asserted (likewise for RX) | |
61 | * @fifohalfsize: number of bytes that can be written when MCI_TXFIFOHALFEMPTY | |
62 | * is asserted (likewise for RX) | |
ae7b0061 | 63 | * @data_cmd_enable: enable value for data commands. |
c7354133 | 64 | * @st_sdio: enable ST specific SDIO logic |
b70a67f9 | 65 | * @st_clkdiv: true if using a ST-specific clock divider algorithm |
e17dca2b | 66 | * @datactrl_mask_ddrmode: ddr mode mask in datactrl register. |
1784b157 | 67 | * @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register |
ff783233 SK |
68 | * @blksz_datactrl4: true if Block size is at b4..b16 position in datactrl |
69 | * register | |
5df014df | 70 | * @datactrl_mask_sdio: SDIO enable mask in datactrl register |
7d72a1d4 | 71 | * @pwrreg_powerup: power up value for MMCIPOWER register |
dc6500bf | 72 | * @f_max: maximum clk frequency supported by the controller. |
4d1a3a0d | 73 | * @signal_direction: input/out direction of bus signals can be indicated |
f4670dae | 74 | * @pwrreg_clkgate: MMCIPOWER register must be used to gate the clock |
01259620 | 75 | * @busy_detect: true if busy detection on dat0 is supported |
1ff44433 | 76 | * @pwrreg_nopower: bits in MMCIPOWER don't controls ext. power supply |
3f4e6f7b | 77 | * @explicit_mclk_control: enable explicit mclk control in driver. |
9c34b73d | 78 | * @qcom_fifo: enables qcom specific fifo pio read logic. |
9cb15142 | 79 | * @qcom_dml: enables qcom specific dma glue for dma transfers. |
7878289b | 80 | * @reversed_irq_handling: handle data irq before cmd irq. |
4956e109 RV |
81 | */ |
82 | struct variant_data { | |
83 | unsigned int clkreg; | |
4380c14f | 84 | unsigned int clkreg_enable; |
e1412d85 | 85 | unsigned int clkreg_8bit_bus_enable; |
e8740644 | 86 | unsigned int clkreg_neg_edge_enable; |
08458ef6 | 87 | unsigned int datalength_bits; |
8301bb68 RV |
88 | unsigned int fifosize; |
89 | unsigned int fifohalfsize; | |
ae7b0061 | 90 | unsigned int data_cmd_enable; |
e17dca2b | 91 | unsigned int datactrl_mask_ddrmode; |
5df014df | 92 | unsigned int datactrl_mask_sdio; |
c7354133 | 93 | bool st_sdio; |
b70a67f9 | 94 | bool st_clkdiv; |
1784b157 | 95 | bool blksz_datactrl16; |
ff783233 | 96 | bool blksz_datactrl4; |
7d72a1d4 | 97 | u32 pwrreg_powerup; |
dc6500bf | 98 | u32 f_max; |
4d1a3a0d | 99 | bool signal_direction; |
f4670dae | 100 | bool pwrreg_clkgate; |
01259620 | 101 | bool busy_detect; |
1ff44433 | 102 | bool pwrreg_nopower; |
3f4e6f7b | 103 | bool explicit_mclk_control; |
9c34b73d | 104 | bool qcom_fifo; |
9cb15142 | 105 | bool qcom_dml; |
7878289b | 106 | bool reversed_irq_handling; |
4956e109 RV |
107 | }; |
108 | ||
109 | static struct variant_data variant_arm = { | |
8301bb68 RV |
110 | .fifosize = 16 * 4, |
111 | .fifohalfsize = 8 * 4, | |
08458ef6 | 112 | .datalength_bits = 16, |
7d72a1d4 | 113 | .pwrreg_powerup = MCI_PWR_UP, |
dc6500bf | 114 | .f_max = 100000000, |
7878289b | 115 | .reversed_irq_handling = true, |
4956e109 RV |
116 | }; |
117 | ||
768fbc18 PM |
118 | static struct variant_data variant_arm_extended_fifo = { |
119 | .fifosize = 128 * 4, | |
120 | .fifohalfsize = 64 * 4, | |
121 | .datalength_bits = 16, | |
7d72a1d4 | 122 | .pwrreg_powerup = MCI_PWR_UP, |
dc6500bf | 123 | .f_max = 100000000, |
768fbc18 PM |
124 | }; |
125 | ||
3a37298a PM |
126 | static struct variant_data variant_arm_extended_fifo_hwfc = { |
127 | .fifosize = 128 * 4, | |
128 | .fifohalfsize = 64 * 4, | |
129 | .clkreg_enable = MCI_ARM_HWFCEN, | |
130 | .datalength_bits = 16, | |
131 | .pwrreg_powerup = MCI_PWR_UP, | |
dc6500bf | 132 | .f_max = 100000000, |
3a37298a PM |
133 | }; |
134 | ||
4956e109 | 135 | static struct variant_data variant_u300 = { |
8301bb68 RV |
136 | .fifosize = 16 * 4, |
137 | .fifohalfsize = 8 * 4, | |
49ac215e | 138 | .clkreg_enable = MCI_ST_U300_HWFCEN, |
e1412d85 | 139 | .clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS, |
08458ef6 | 140 | .datalength_bits = 16, |
5df014df | 141 | .datactrl_mask_sdio = MCI_ST_DPSM_SDIOEN, |
c7354133 | 142 | .st_sdio = true, |
7d72a1d4 | 143 | .pwrreg_powerup = MCI_PWR_ON, |
dc6500bf | 144 | .f_max = 100000000, |
4d1a3a0d | 145 | .signal_direction = true, |
f4670dae | 146 | .pwrreg_clkgate = true, |
1ff44433 | 147 | .pwrreg_nopower = true, |
4956e109 RV |
148 | }; |
149 | ||
34fd4213 LW |
150 | static struct variant_data variant_nomadik = { |
151 | .fifosize = 16 * 4, | |
152 | .fifohalfsize = 8 * 4, | |
153 | .clkreg = MCI_CLK_ENABLE, | |
154 | .datalength_bits = 24, | |
5df014df | 155 | .datactrl_mask_sdio = MCI_ST_DPSM_SDIOEN, |
c7354133 | 156 | .st_sdio = true, |
34fd4213 LW |
157 | .st_clkdiv = true, |
158 | .pwrreg_powerup = MCI_PWR_ON, | |
dc6500bf | 159 | .f_max = 100000000, |
34fd4213 | 160 | .signal_direction = true, |
f4670dae | 161 | .pwrreg_clkgate = true, |
1ff44433 | 162 | .pwrreg_nopower = true, |
34fd4213 LW |
163 | }; |
164 | ||
4956e109 | 165 | static struct variant_data variant_ux500 = { |
8301bb68 RV |
166 | .fifosize = 30 * 4, |
167 | .fifohalfsize = 8 * 4, | |
4956e109 | 168 | .clkreg = MCI_CLK_ENABLE, |
49ac215e | 169 | .clkreg_enable = MCI_ST_UX500_HWFCEN, |
e1412d85 | 170 | .clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS, |
e8740644 | 171 | .clkreg_neg_edge_enable = MCI_ST_UX500_NEG_EDGE, |
08458ef6 | 172 | .datalength_bits = 24, |
5df014df | 173 | .datactrl_mask_sdio = MCI_ST_DPSM_SDIOEN, |
c7354133 | 174 | .st_sdio = true, |
b70a67f9 | 175 | .st_clkdiv = true, |
7d72a1d4 | 176 | .pwrreg_powerup = MCI_PWR_ON, |
dc6500bf | 177 | .f_max = 100000000, |
4d1a3a0d | 178 | .signal_direction = true, |
f4670dae | 179 | .pwrreg_clkgate = true, |
01259620 | 180 | .busy_detect = true, |
1ff44433 | 181 | .pwrreg_nopower = true, |
4956e109 | 182 | }; |
b70a67f9 | 183 | |
1784b157 PL |
184 | static struct variant_data variant_ux500v2 = { |
185 | .fifosize = 30 * 4, | |
186 | .fifohalfsize = 8 * 4, | |
187 | .clkreg = MCI_CLK_ENABLE, | |
188 | .clkreg_enable = MCI_ST_UX500_HWFCEN, | |
e1412d85 | 189 | .clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS, |
e8740644 | 190 | .clkreg_neg_edge_enable = MCI_ST_UX500_NEG_EDGE, |
e17dca2b | 191 | .datactrl_mask_ddrmode = MCI_ST_DPSM_DDRMODE, |
1784b157 | 192 | .datalength_bits = 24, |
5df014df | 193 | .datactrl_mask_sdio = MCI_ST_DPSM_SDIOEN, |
c7354133 | 194 | .st_sdio = true, |
1784b157 PL |
195 | .st_clkdiv = true, |
196 | .blksz_datactrl16 = true, | |
7d72a1d4 | 197 | .pwrreg_powerup = MCI_PWR_ON, |
dc6500bf | 198 | .f_max = 100000000, |
4d1a3a0d | 199 | .signal_direction = true, |
f4670dae | 200 | .pwrreg_clkgate = true, |
01259620 | 201 | .busy_detect = true, |
1ff44433 | 202 | .pwrreg_nopower = true, |
1784b157 PL |
203 | }; |
204 | ||
55b604ae SK |
205 | static struct variant_data variant_qcom = { |
206 | .fifosize = 16 * 4, | |
207 | .fifohalfsize = 8 * 4, | |
208 | .clkreg = MCI_CLK_ENABLE, | |
209 | .clkreg_enable = MCI_QCOM_CLK_FLOWENA | | |
210 | MCI_QCOM_CLK_SELECT_IN_FBCLK, | |
211 | .clkreg_8bit_bus_enable = MCI_QCOM_CLK_WIDEBUS_8, | |
212 | .datactrl_mask_ddrmode = MCI_QCOM_CLK_SELECT_IN_DDR_MODE, | |
213 | .data_cmd_enable = MCI_QCOM_CSPM_DATCMD, | |
214 | .blksz_datactrl4 = true, | |
215 | .datalength_bits = 24, | |
216 | .pwrreg_powerup = MCI_PWR_UP, | |
217 | .f_max = 208000000, | |
218 | .explicit_mclk_control = true, | |
219 | .qcom_fifo = true, | |
9cb15142 | 220 | .qcom_dml = true, |
55b604ae SK |
221 | }; |
222 | ||
01259620 UH |
223 | static int mmci_card_busy(struct mmc_host *mmc) |
224 | { | |
225 | struct mmci_host *host = mmc_priv(mmc); | |
226 | unsigned long flags; | |
227 | int busy = 0; | |
228 | ||
229 | pm_runtime_get_sync(mmc_dev(mmc)); | |
230 | ||
231 | spin_lock_irqsave(&host->lock, flags); | |
232 | if (readl(host->base + MMCISTATUS) & MCI_ST_CARDBUSY) | |
233 | busy = 1; | |
234 | spin_unlock_irqrestore(&host->lock, flags); | |
235 | ||
236 | pm_runtime_mark_last_busy(mmc_dev(mmc)); | |
237 | pm_runtime_put_autosuspend(mmc_dev(mmc)); | |
238 | ||
239 | return busy; | |
240 | } | |
241 | ||
653a761e UH |
242 | /* |
243 | * Validate mmc prerequisites | |
244 | */ | |
245 | static int mmci_validate_data(struct mmci_host *host, | |
246 | struct mmc_data *data) | |
247 | { | |
248 | if (!data) | |
249 | return 0; | |
250 | ||
251 | if (!is_power_of_2(data->blksz)) { | |
252 | dev_err(mmc_dev(host->mmc), | |
253 | "unsupported block size (%d bytes)\n", data->blksz); | |
254 | return -EINVAL; | |
255 | } | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
f829c042 UH |
260 | static void mmci_reg_delay(struct mmci_host *host) |
261 | { | |
262 | /* | |
263 | * According to the spec, at least three feedback clock cycles | |
264 | * of max 52 MHz must pass between two writes to the MMCICLOCK reg. | |
265 | * Three MCLK clock cycles must pass between two MMCIPOWER reg writes. | |
266 | * Worst delay time during card init is at 100 kHz => 30 us. | |
267 | * Worst delay time when up and running is at 25 MHz => 120 ns. | |
268 | */ | |
269 | if (host->cclk < 25000000) | |
270 | udelay(30); | |
271 | else | |
272 | ndelay(120); | |
273 | } | |
274 | ||
7437cfa5 UH |
275 | /* |
276 | * This must be called with host->lock held | |
277 | */ | |
278 | static void mmci_write_clkreg(struct mmci_host *host, u32 clk) | |
279 | { | |
280 | if (host->clk_reg != clk) { | |
281 | host->clk_reg = clk; | |
282 | writel(clk, host->base + MMCICLOCK); | |
283 | } | |
284 | } | |
285 | ||
286 | /* | |
287 | * This must be called with host->lock held | |
288 | */ | |
289 | static void mmci_write_pwrreg(struct mmci_host *host, u32 pwr) | |
290 | { | |
291 | if (host->pwr_reg != pwr) { | |
292 | host->pwr_reg = pwr; | |
293 | writel(pwr, host->base + MMCIPOWER); | |
294 | } | |
295 | } | |
296 | ||
9cc639a2 UH |
297 | /* |
298 | * This must be called with host->lock held | |
299 | */ | |
300 | static void mmci_write_datactrlreg(struct mmci_host *host, u32 datactrl) | |
301 | { | |
01259620 UH |
302 | /* Keep ST Micro busy mode if enabled */ |
303 | datactrl |= host->datactrl_reg & MCI_ST_DPSM_BUSYMODE; | |
304 | ||
9cc639a2 UH |
305 | if (host->datactrl_reg != datactrl) { |
306 | host->datactrl_reg = datactrl; | |
307 | writel(datactrl, host->base + MMCIDATACTRL); | |
308 | } | |
309 | } | |
310 | ||
a6a6464a LW |
311 | /* |
312 | * This must be called with host->lock held | |
313 | */ | |
314 | static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired) | |
315 | { | |
4956e109 RV |
316 | struct variant_data *variant = host->variant; |
317 | u32 clk = variant->clkreg; | |
a6a6464a | 318 | |
c58a8509 UH |
319 | /* Make sure cclk reflects the current calculated clock */ |
320 | host->cclk = 0; | |
321 | ||
a6a6464a | 322 | if (desired) { |
3f4e6f7b SK |
323 | if (variant->explicit_mclk_control) { |
324 | host->cclk = host->mclk; | |
325 | } else if (desired >= host->mclk) { | |
991a86e1 | 326 | clk = MCI_CLK_BYPASS; |
399bc486 LW |
327 | if (variant->st_clkdiv) |
328 | clk |= MCI_ST_UX500_NEG_EDGE; | |
a6a6464a | 329 | host->cclk = host->mclk; |
b70a67f9 LW |
330 | } else if (variant->st_clkdiv) { |
331 | /* | |
332 | * DB8500 TRM says f = mclk / (clkdiv + 2) | |
333 | * => clkdiv = (mclk / f) - 2 | |
334 | * Round the divider up so we don't exceed the max | |
335 | * frequency | |
336 | */ | |
337 | clk = DIV_ROUND_UP(host->mclk, desired) - 2; | |
338 | if (clk >= 256) | |
339 | clk = 255; | |
340 | host->cclk = host->mclk / (clk + 2); | |
a6a6464a | 341 | } else { |
b70a67f9 LW |
342 | /* |
343 | * PL180 TRM says f = mclk / (2 * (clkdiv + 1)) | |
344 | * => clkdiv = mclk / (2 * f) - 1 | |
345 | */ | |
a6a6464a LW |
346 | clk = host->mclk / (2 * desired) - 1; |
347 | if (clk >= 256) | |
348 | clk = 255; | |
349 | host->cclk = host->mclk / (2 * (clk + 1)); | |
350 | } | |
4380c14f RV |
351 | |
352 | clk |= variant->clkreg_enable; | |
a6a6464a LW |
353 | clk |= MCI_CLK_ENABLE; |
354 | /* This hasn't proven to be worthwhile */ | |
355 | /* clk |= MCI_CLK_PWRSAVE; */ | |
356 | } | |
357 | ||
c58a8509 UH |
358 | /* Set actual clock for debug */ |
359 | host->mmc->actual_clock = host->cclk; | |
360 | ||
9e6c82cd | 361 | if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) |
771dc157 LW |
362 | clk |= MCI_4BIT_BUS; |
363 | if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_8) | |
e1412d85 | 364 | clk |= variant->clkreg_8bit_bus_enable; |
9e6c82cd | 365 | |
6dad6c95 SJ |
366 | if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50 || |
367 | host->mmc->ios.timing == MMC_TIMING_MMC_DDR52) | |
e8740644 | 368 | clk |= variant->clkreg_neg_edge_enable; |
6dbb6ee0 | 369 | |
7437cfa5 | 370 | mmci_write_clkreg(host, clk); |
a6a6464a LW |
371 | } |
372 | ||
1da177e4 LT |
373 | static void |
374 | mmci_request_end(struct mmci_host *host, struct mmc_request *mrq) | |
375 | { | |
376 | writel(0, host->base + MMCICOMMAND); | |
377 | ||
e47c222b RK |
378 | BUG_ON(host->data); |
379 | ||
1da177e4 LT |
380 | host->mrq = NULL; |
381 | host->cmd = NULL; | |
382 | ||
1da177e4 | 383 | mmc_request_done(host->mmc, mrq); |
2cd976c4 UH |
384 | |
385 | pm_runtime_mark_last_busy(mmc_dev(host->mmc)); | |
386 | pm_runtime_put_autosuspend(mmc_dev(host->mmc)); | |
1da177e4 LT |
387 | } |
388 | ||
2686b4b4 LW |
389 | static void mmci_set_mask1(struct mmci_host *host, unsigned int mask) |
390 | { | |
391 | void __iomem *base = host->base; | |
392 | ||
393 | if (host->singleirq) { | |
394 | unsigned int mask0 = readl(base + MMCIMASK0); | |
395 | ||
396 | mask0 &= ~MCI_IRQ1MASK; | |
397 | mask0 |= mask; | |
398 | ||
399 | writel(mask0, base + MMCIMASK0); | |
400 | } | |
401 | ||
402 | writel(mask, base + MMCIMASK1); | |
403 | } | |
404 | ||
1da177e4 LT |
405 | static void mmci_stop_data(struct mmci_host *host) |
406 | { | |
9cc639a2 | 407 | mmci_write_datactrlreg(host, 0); |
2686b4b4 | 408 | mmci_set_mask1(host, 0); |
1da177e4 LT |
409 | host->data = NULL; |
410 | } | |
411 | ||
4ce1d6cb RV |
412 | static void mmci_init_sg(struct mmci_host *host, struct mmc_data *data) |
413 | { | |
414 | unsigned int flags = SG_MITER_ATOMIC; | |
415 | ||
416 | if (data->flags & MMC_DATA_READ) | |
417 | flags |= SG_MITER_TO_SG; | |
418 | else | |
419 | flags |= SG_MITER_FROM_SG; | |
420 | ||
421 | sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); | |
422 | } | |
423 | ||
c8ebae37 RK |
424 | /* |
425 | * All the DMA operation mode stuff goes inside this ifdef. | |
426 | * This assumes that you have a generic DMA device interface, | |
427 | * no custom DMA interfaces are supported. | |
428 | */ | |
429 | #ifdef CONFIG_DMA_ENGINE | |
c3be1efd | 430 | static void mmci_dma_setup(struct mmci_host *host) |
c8ebae37 | 431 | { |
c8ebae37 RK |
432 | const char *rxname, *txname; |
433 | dma_cap_mask_t mask; | |
9cb15142 | 434 | struct variant_data *variant = host->variant; |
c8ebae37 | 435 | |
1fd83f0e LJ |
436 | host->dma_rx_channel = dma_request_slave_channel(mmc_dev(host->mmc), "rx"); |
437 | host->dma_tx_channel = dma_request_slave_channel(mmc_dev(host->mmc), "tx"); | |
c8ebae37 | 438 | |
58c7ccbf PF |
439 | /* initialize pre request cookie */ |
440 | host->next_data.cookie = 1; | |
441 | ||
c8ebae37 RK |
442 | /* Try to acquire a generic DMA engine slave channel */ |
443 | dma_cap_zero(mask); | |
444 | dma_cap_set(DMA_SLAVE, mask); | |
445 | ||
1fd83f0e LJ |
446 | /* |
447 | * If only an RX channel is specified, the driver will | |
448 | * attempt to use it bidirectionally, however if it is | |
449 | * is specified but cannot be located, DMA will be disabled. | |
450 | */ | |
451 | if (host->dma_rx_channel && !host->dma_tx_channel) | |
452 | host->dma_tx_channel = host->dma_rx_channel; | |
453 | ||
c8ebae37 RK |
454 | if (host->dma_rx_channel) |
455 | rxname = dma_chan_name(host->dma_rx_channel); | |
456 | else | |
457 | rxname = "none"; | |
458 | ||
459 | if (host->dma_tx_channel) | |
460 | txname = dma_chan_name(host->dma_tx_channel); | |
461 | else | |
462 | txname = "none"; | |
463 | ||
464 | dev_info(mmc_dev(host->mmc), "DMA channels RX %s, TX %s\n", | |
465 | rxname, txname); | |
466 | ||
467 | /* | |
468 | * Limit the maximum segment size in any SG entry according to | |
469 | * the parameters of the DMA engine device. | |
470 | */ | |
471 | if (host->dma_tx_channel) { | |
472 | struct device *dev = host->dma_tx_channel->device->dev; | |
473 | unsigned int max_seg_size = dma_get_max_seg_size(dev); | |
474 | ||
475 | if (max_seg_size < host->mmc->max_seg_size) | |
476 | host->mmc->max_seg_size = max_seg_size; | |
477 | } | |
478 | if (host->dma_rx_channel) { | |
479 | struct device *dev = host->dma_rx_channel->device->dev; | |
480 | unsigned int max_seg_size = dma_get_max_seg_size(dev); | |
481 | ||
482 | if (max_seg_size < host->mmc->max_seg_size) | |
483 | host->mmc->max_seg_size = max_seg_size; | |
484 | } | |
9cb15142 SK |
485 | |
486 | if (variant->qcom_dml && host->dma_rx_channel && host->dma_tx_channel) | |
487 | if (dml_hw_init(host, host->mmc->parent->of_node)) | |
488 | variant->qcom_dml = false; | |
c8ebae37 RK |
489 | } |
490 | ||
491 | /* | |
6e0ee714 | 492 | * This is used in or so inline it |
c8ebae37 RK |
493 | * so it can be discarded. |
494 | */ | |
495 | static inline void mmci_dma_release(struct mmci_host *host) | |
496 | { | |
c8ebae37 RK |
497 | if (host->dma_rx_channel) |
498 | dma_release_channel(host->dma_rx_channel); | |
8c3a05b4 | 499 | if (host->dma_tx_channel) |
c8ebae37 RK |
500 | dma_release_channel(host->dma_tx_channel); |
501 | host->dma_rx_channel = host->dma_tx_channel = NULL; | |
502 | } | |
503 | ||
653a761e UH |
504 | static void mmci_dma_data_error(struct mmci_host *host) |
505 | { | |
506 | dev_err(mmc_dev(host->mmc), "error during DMA transfer!\n"); | |
507 | dmaengine_terminate_all(host->dma_current); | |
508 | host->dma_current = NULL; | |
509 | host->dma_desc_current = NULL; | |
510 | host->data->host_cookie = 0; | |
511 | } | |
512 | ||
c8ebae37 RK |
513 | static void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data) |
514 | { | |
653a761e | 515 | struct dma_chan *chan; |
c8ebae37 | 516 | enum dma_data_direction dir; |
653a761e UH |
517 | |
518 | if (data->flags & MMC_DATA_READ) { | |
519 | dir = DMA_FROM_DEVICE; | |
520 | chan = host->dma_rx_channel; | |
521 | } else { | |
522 | dir = DMA_TO_DEVICE; | |
523 | chan = host->dma_tx_channel; | |
524 | } | |
525 | ||
526 | dma_unmap_sg(chan->device->dev, data->sg, data->sg_len, dir); | |
527 | } | |
528 | ||
529 | static void mmci_dma_finalize(struct mmci_host *host, struct mmc_data *data) | |
530 | { | |
c8ebae37 RK |
531 | u32 status; |
532 | int i; | |
533 | ||
534 | /* Wait up to 1ms for the DMA to complete */ | |
535 | for (i = 0; ; i++) { | |
536 | status = readl(host->base + MMCISTATUS); | |
537 | if (!(status & MCI_RXDATAAVLBLMASK) || i >= 100) | |
538 | break; | |
539 | udelay(10); | |
540 | } | |
541 | ||
542 | /* | |
543 | * Check to see whether we still have some data left in the FIFO - | |
544 | * this catches DMA controllers which are unable to monitor the | |
545 | * DMALBREQ and DMALSREQ signals while allowing us to DMA to non- | |
546 | * contiguous buffers. On TX, we'll get a FIFO underrun error. | |
547 | */ | |
548 | if (status & MCI_RXDATAAVLBLMASK) { | |
653a761e | 549 | mmci_dma_data_error(host); |
c8ebae37 RK |
550 | if (!data->error) |
551 | data->error = -EIO; | |
552 | } | |
553 | ||
58c7ccbf | 554 | if (!data->host_cookie) |
653a761e | 555 | mmci_dma_unmap(host, data); |
c8ebae37 RK |
556 | |
557 | /* | |
558 | * Use of DMA with scatter-gather is impossible. | |
559 | * Give up with DMA and switch back to PIO mode. | |
560 | */ | |
561 | if (status & MCI_RXDATAAVLBLMASK) { | |
562 | dev_err(mmc_dev(host->mmc), "buggy DMA detected. Taking evasive action.\n"); | |
563 | mmci_dma_release(host); | |
564 | } | |
c8ebae37 | 565 | |
653a761e UH |
566 | host->dma_current = NULL; |
567 | host->dma_desc_current = NULL; | |
c8ebae37 RK |
568 | } |
569 | ||
653a761e UH |
570 | /* prepares DMA channel and DMA descriptor, returns non-zero on failure */ |
571 | static int __mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data, | |
572 | struct dma_chan **dma_chan, | |
573 | struct dma_async_tx_descriptor **dma_desc) | |
c8ebae37 RK |
574 | { |
575 | struct variant_data *variant = host->variant; | |
576 | struct dma_slave_config conf = { | |
577 | .src_addr = host->phybase + MMCIFIFO, | |
578 | .dst_addr = host->phybase + MMCIFIFO, | |
579 | .src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, | |
580 | .dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, | |
581 | .src_maxburst = variant->fifohalfsize >> 2, /* # of words */ | |
582 | .dst_maxburst = variant->fifohalfsize >> 2, /* # of words */ | |
258aea76 | 583 | .device_fc = false, |
c8ebae37 | 584 | }; |
c8ebae37 RK |
585 | struct dma_chan *chan; |
586 | struct dma_device *device; | |
587 | struct dma_async_tx_descriptor *desc; | |
05f5799c | 588 | enum dma_data_direction buffer_dirn; |
c8ebae37 | 589 | int nr_sg; |
9cb15142 | 590 | unsigned long flags = DMA_CTRL_ACK; |
c8ebae37 | 591 | |
c8ebae37 | 592 | if (data->flags & MMC_DATA_READ) { |
05f5799c VK |
593 | conf.direction = DMA_DEV_TO_MEM; |
594 | buffer_dirn = DMA_FROM_DEVICE; | |
c8ebae37 RK |
595 | chan = host->dma_rx_channel; |
596 | } else { | |
05f5799c VK |
597 | conf.direction = DMA_MEM_TO_DEV; |
598 | buffer_dirn = DMA_TO_DEVICE; | |
c8ebae37 RK |
599 | chan = host->dma_tx_channel; |
600 | } | |
601 | ||
602 | /* If there's no DMA channel, fall back to PIO */ | |
603 | if (!chan) | |
604 | return -EINVAL; | |
605 | ||
606 | /* If less than or equal to the fifo size, don't bother with DMA */ | |
58c7ccbf | 607 | if (data->blksz * data->blocks <= variant->fifosize) |
c8ebae37 RK |
608 | return -EINVAL; |
609 | ||
610 | device = chan->device; | |
05f5799c | 611 | nr_sg = dma_map_sg(device->dev, data->sg, data->sg_len, buffer_dirn); |
c8ebae37 RK |
612 | if (nr_sg == 0) |
613 | return -EINVAL; | |
614 | ||
9cb15142 SK |
615 | if (host->variant->qcom_dml) |
616 | flags |= DMA_PREP_INTERRUPT; | |
617 | ||
c8ebae37 | 618 | dmaengine_slave_config(chan, &conf); |
16052827 | 619 | desc = dmaengine_prep_slave_sg(chan, data->sg, nr_sg, |
9cb15142 | 620 | conf.direction, flags); |
c8ebae37 RK |
621 | if (!desc) |
622 | goto unmap_exit; | |
623 | ||
653a761e UH |
624 | *dma_chan = chan; |
625 | *dma_desc = desc; | |
58c7ccbf PF |
626 | |
627 | return 0; | |
c8ebae37 | 628 | |
58c7ccbf | 629 | unmap_exit: |
05f5799c | 630 | dma_unmap_sg(device->dev, data->sg, data->sg_len, buffer_dirn); |
58c7ccbf PF |
631 | return -ENOMEM; |
632 | } | |
633 | ||
653a761e UH |
634 | static inline int mmci_dma_prep_data(struct mmci_host *host, |
635 | struct mmc_data *data) | |
636 | { | |
637 | /* Check if next job is already prepared. */ | |
638 | if (host->dma_current && host->dma_desc_current) | |
639 | return 0; | |
640 | ||
641 | /* No job were prepared thus do it now. */ | |
642 | return __mmci_dma_prep_data(host, data, &host->dma_current, | |
643 | &host->dma_desc_current); | |
644 | } | |
645 | ||
646 | static inline int mmci_dma_prep_next(struct mmci_host *host, | |
647 | struct mmc_data *data) | |
648 | { | |
649 | struct mmci_host_next *nd = &host->next_data; | |
650 | return __mmci_dma_prep_data(host, data, &nd->dma_chan, &nd->dma_desc); | |
651 | } | |
652 | ||
58c7ccbf PF |
653 | static int mmci_dma_start_data(struct mmci_host *host, unsigned int datactrl) |
654 | { | |
655 | int ret; | |
656 | struct mmc_data *data = host->data; | |
657 | ||
653a761e | 658 | ret = mmci_dma_prep_data(host, host->data); |
58c7ccbf PF |
659 | if (ret) |
660 | return ret; | |
661 | ||
662 | /* Okay, go for it. */ | |
c8ebae37 RK |
663 | dev_vdbg(mmc_dev(host->mmc), |
664 | "Submit MMCI DMA job, sglen %d blksz %04x blks %04x flags %08x\n", | |
665 | data->sg_len, data->blksz, data->blocks, data->flags); | |
58c7ccbf PF |
666 | dmaengine_submit(host->dma_desc_current); |
667 | dma_async_issue_pending(host->dma_current); | |
c8ebae37 | 668 | |
9cb15142 SK |
669 | if (host->variant->qcom_dml) |
670 | dml_start_xfer(host, data); | |
671 | ||
c8ebae37 RK |
672 | datactrl |= MCI_DPSM_DMAENABLE; |
673 | ||
674 | /* Trigger the DMA transfer */ | |
9cc639a2 | 675 | mmci_write_datactrlreg(host, datactrl); |
c8ebae37 RK |
676 | |
677 | /* | |
678 | * Let the MMCI say when the data is ended and it's time | |
679 | * to fire next DMA request. When that happens, MMCI will | |
680 | * call mmci_data_end() | |
681 | */ | |
682 | writel(readl(host->base + MMCIMASK0) | MCI_DATAENDMASK, | |
683 | host->base + MMCIMASK0); | |
684 | return 0; | |
58c7ccbf | 685 | } |
c8ebae37 | 686 | |
58c7ccbf PF |
687 | static void mmci_get_next_data(struct mmci_host *host, struct mmc_data *data) |
688 | { | |
689 | struct mmci_host_next *next = &host->next_data; | |
690 | ||
653a761e UH |
691 | WARN_ON(data->host_cookie && data->host_cookie != next->cookie); |
692 | WARN_ON(!data->host_cookie && (next->dma_desc || next->dma_chan)); | |
58c7ccbf PF |
693 | |
694 | host->dma_desc_current = next->dma_desc; | |
695 | host->dma_current = next->dma_chan; | |
58c7ccbf PF |
696 | next->dma_desc = NULL; |
697 | next->dma_chan = NULL; | |
c8ebae37 | 698 | } |
58c7ccbf PF |
699 | |
700 | static void mmci_pre_request(struct mmc_host *mmc, struct mmc_request *mrq, | |
701 | bool is_first_req) | |
702 | { | |
703 | struct mmci_host *host = mmc_priv(mmc); | |
704 | struct mmc_data *data = mrq->data; | |
705 | struct mmci_host_next *nd = &host->next_data; | |
706 | ||
707 | if (!data) | |
708 | return; | |
709 | ||
653a761e UH |
710 | BUG_ON(data->host_cookie); |
711 | ||
712 | if (mmci_validate_data(host, data)) | |
58c7ccbf | 713 | return; |
58c7ccbf | 714 | |
653a761e UH |
715 | if (!mmci_dma_prep_next(host, data)) |
716 | data->host_cookie = ++nd->cookie < 0 ? 1 : nd->cookie; | |
58c7ccbf PF |
717 | } |
718 | ||
719 | static void mmci_post_request(struct mmc_host *mmc, struct mmc_request *mrq, | |
720 | int err) | |
721 | { | |
722 | struct mmci_host *host = mmc_priv(mmc); | |
723 | struct mmc_data *data = mrq->data; | |
58c7ccbf | 724 | |
653a761e | 725 | if (!data || !data->host_cookie) |
58c7ccbf PF |
726 | return; |
727 | ||
653a761e | 728 | mmci_dma_unmap(host, data); |
58c7ccbf | 729 | |
653a761e UH |
730 | if (err) { |
731 | struct mmci_host_next *next = &host->next_data; | |
732 | struct dma_chan *chan; | |
733 | if (data->flags & MMC_DATA_READ) | |
734 | chan = host->dma_rx_channel; | |
735 | else | |
736 | chan = host->dma_tx_channel; | |
737 | dmaengine_terminate_all(chan); | |
58c7ccbf | 738 | |
b5c16a60 SK |
739 | if (host->dma_desc_current == next->dma_desc) |
740 | host->dma_desc_current = NULL; | |
741 | ||
742 | if (host->dma_current == next->dma_chan) | |
743 | host->dma_current = NULL; | |
744 | ||
653a761e UH |
745 | next->dma_desc = NULL; |
746 | next->dma_chan = NULL; | |
b5c16a60 | 747 | data->host_cookie = 0; |
58c7ccbf PF |
748 | } |
749 | } | |
750 | ||
c8ebae37 RK |
751 | #else |
752 | /* Blank functions if the DMA engine is not available */ | |
58c7ccbf PF |
753 | static void mmci_get_next_data(struct mmci_host *host, struct mmc_data *data) |
754 | { | |
755 | } | |
c8ebae37 RK |
756 | static inline void mmci_dma_setup(struct mmci_host *host) |
757 | { | |
758 | } | |
759 | ||
760 | static inline void mmci_dma_release(struct mmci_host *host) | |
761 | { | |
762 | } | |
763 | ||
764 | static inline void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data) | |
765 | { | |
766 | } | |
767 | ||
653a761e UH |
768 | static inline void mmci_dma_finalize(struct mmci_host *host, |
769 | struct mmc_data *data) | |
770 | { | |
771 | } | |
772 | ||
c8ebae37 RK |
773 | static inline void mmci_dma_data_error(struct mmci_host *host) |
774 | { | |
775 | } | |
776 | ||
777 | static inline int mmci_dma_start_data(struct mmci_host *host, unsigned int datactrl) | |
778 | { | |
779 | return -ENOSYS; | |
780 | } | |
58c7ccbf PF |
781 | |
782 | #define mmci_pre_request NULL | |
783 | #define mmci_post_request NULL | |
784 | ||
c8ebae37 RK |
785 | #endif |
786 | ||
1da177e4 LT |
787 | static void mmci_start_data(struct mmci_host *host, struct mmc_data *data) |
788 | { | |
8301bb68 | 789 | struct variant_data *variant = host->variant; |
1da177e4 | 790 | unsigned int datactrl, timeout, irqmask; |
7b09cdac | 791 | unsigned long long clks; |
1da177e4 | 792 | void __iomem *base; |
3bc87f24 | 793 | int blksz_bits; |
1da177e4 | 794 | |
64de0289 LW |
795 | dev_dbg(mmc_dev(host->mmc), "blksz %04x blks %04x flags %08x\n", |
796 | data->blksz, data->blocks, data->flags); | |
1da177e4 LT |
797 | |
798 | host->data = data; | |
528320db | 799 | host->size = data->blksz * data->blocks; |
51d4375d | 800 | data->bytes_xfered = 0; |
1da177e4 | 801 | |
7b09cdac | 802 | clks = (unsigned long long)data->timeout_ns * host->cclk; |
c4a35769 | 803 | do_div(clks, NSEC_PER_SEC); |
7b09cdac RK |
804 | |
805 | timeout = data->timeout_clks + (unsigned int)clks; | |
1da177e4 LT |
806 | |
807 | base = host->base; | |
808 | writel(timeout, base + MMCIDATATIMER); | |
809 | writel(host->size, base + MMCIDATALENGTH); | |
810 | ||
3bc87f24 RK |
811 | blksz_bits = ffs(data->blksz) - 1; |
812 | BUG_ON(1 << blksz_bits != data->blksz); | |
813 | ||
1784b157 PL |
814 | if (variant->blksz_datactrl16) |
815 | datactrl = MCI_DPSM_ENABLE | (data->blksz << 16); | |
ff783233 SK |
816 | else if (variant->blksz_datactrl4) |
817 | datactrl = MCI_DPSM_ENABLE | (data->blksz << 4); | |
1784b157 PL |
818 | else |
819 | datactrl = MCI_DPSM_ENABLE | blksz_bits << 4; | |
c8ebae37 RK |
820 | |
821 | if (data->flags & MMC_DATA_READ) | |
1da177e4 | 822 | datactrl |= MCI_DPSM_DIRECTION; |
c8ebae37 | 823 | |
c7354133 SK |
824 | if (host->mmc->card && mmc_card_sdio(host->mmc->card)) { |
825 | u32 clk; | |
7258db7e | 826 | |
c7354133 SK |
827 | datactrl |= variant->datactrl_mask_sdio; |
828 | ||
829 | /* | |
830 | * The ST Micro variant for SDIO small write transfers | |
831 | * needs to have clock H/W flow control disabled, | |
832 | * otherwise the transfer will not start. The threshold | |
833 | * depends on the rate of MCLK. | |
834 | */ | |
835 | if (variant->st_sdio && data->flags & MMC_DATA_WRITE && | |
836 | (host->size < 8 || | |
837 | (host->size <= 8 && host->mclk > 50000000))) | |
838 | clk = host->clk_reg & ~variant->clkreg_enable; | |
839 | else | |
840 | clk = host->clk_reg | variant->clkreg_enable; | |
841 | ||
842 | mmci_write_clkreg(host, clk); | |
843 | } | |
06c1a121 | 844 | |
6dad6c95 SJ |
845 | if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50 || |
846 | host->mmc->ios.timing == MMC_TIMING_MMC_DDR52) | |
e17dca2b | 847 | datactrl |= variant->datactrl_mask_ddrmode; |
6dbb6ee0 | 848 | |
c8ebae37 RK |
849 | /* |
850 | * Attempt to use DMA operation mode, if this | |
851 | * should fail, fall back to PIO mode | |
852 | */ | |
853 | if (!mmci_dma_start_data(host, datactrl)) | |
854 | return; | |
855 | ||
856 | /* IRQ mode, map the SG list for CPU reading/writing */ | |
857 | mmci_init_sg(host, data); | |
858 | ||
859 | if (data->flags & MMC_DATA_READ) { | |
1da177e4 | 860 | irqmask = MCI_RXFIFOHALFFULLMASK; |
0425a142 RK |
861 | |
862 | /* | |
c4d877c1 RK |
863 | * If we have less than the fifo 'half-full' threshold to |
864 | * transfer, trigger a PIO interrupt as soon as any data | |
865 | * is available. | |
0425a142 | 866 | */ |
c4d877c1 | 867 | if (host->size < variant->fifohalfsize) |
0425a142 | 868 | irqmask |= MCI_RXDATAAVLBLMASK; |
1da177e4 LT |
869 | } else { |
870 | /* | |
871 | * We don't actually need to include "FIFO empty" here | |
872 | * since its implicit in "FIFO half empty". | |
873 | */ | |
874 | irqmask = MCI_TXFIFOHALFEMPTYMASK; | |
875 | } | |
876 | ||
9cc639a2 | 877 | mmci_write_datactrlreg(host, datactrl); |
1da177e4 | 878 | writel(readl(base + MMCIMASK0) & ~MCI_DATAENDMASK, base + MMCIMASK0); |
2686b4b4 | 879 | mmci_set_mask1(host, irqmask); |
1da177e4 LT |
880 | } |
881 | ||
882 | static void | |
883 | mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c) | |
884 | { | |
885 | void __iomem *base = host->base; | |
886 | ||
64de0289 | 887 | dev_dbg(mmc_dev(host->mmc), "op %02x arg %08x flags %08x\n", |
1da177e4 LT |
888 | cmd->opcode, cmd->arg, cmd->flags); |
889 | ||
890 | if (readl(base + MMCICOMMAND) & MCI_CPSM_ENABLE) { | |
891 | writel(0, base + MMCICOMMAND); | |
6adb2a80 | 892 | mmci_reg_delay(host); |
1da177e4 LT |
893 | } |
894 | ||
895 | c |= cmd->opcode | MCI_CPSM_ENABLE; | |
e9225176 RK |
896 | if (cmd->flags & MMC_RSP_PRESENT) { |
897 | if (cmd->flags & MMC_RSP_136) | |
898 | c |= MCI_CPSM_LONGRSP; | |
1da177e4 | 899 | c |= MCI_CPSM_RESPONSE; |
1da177e4 LT |
900 | } |
901 | if (/*interrupt*/0) | |
902 | c |= MCI_CPSM_INTERRUPT; | |
903 | ||
ae7b0061 SK |
904 | if (mmc_cmd_type(cmd) == MMC_CMD_ADTC) |
905 | c |= host->variant->data_cmd_enable; | |
906 | ||
1da177e4 LT |
907 | host->cmd = cmd; |
908 | ||
909 | writel(cmd->arg, base + MMCIARGUMENT); | |
910 | writel(c, base + MMCICOMMAND); | |
911 | } | |
912 | ||
913 | static void | |
914 | mmci_data_irq(struct mmci_host *host, struct mmc_data *data, | |
915 | unsigned int status) | |
916 | { | |
1cb9da50 UH |
917 | /* Make sure we have data to handle */ |
918 | if (!data) | |
919 | return; | |
920 | ||
f20f8f21 | 921 | /* First check for errors */ |
b63038d6 UH |
922 | if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_STARTBITERR| |
923 | MCI_TXUNDERRUN|MCI_RXOVERRUN)) { | |
8cb28155 | 924 | u32 remain, success; |
f20f8f21 | 925 | |
c8ebae37 | 926 | /* Terminate the DMA transfer */ |
653a761e | 927 | if (dma_inprogress(host)) { |
c8ebae37 | 928 | mmci_dma_data_error(host); |
653a761e UH |
929 | mmci_dma_unmap(host, data); |
930 | } | |
e9c091b4 RK |
931 | |
932 | /* | |
c8afc9d5 RK |
933 | * Calculate how far we are into the transfer. Note that |
934 | * the data counter gives the number of bytes transferred | |
935 | * on the MMC bus, not on the host side. On reads, this | |
936 | * can be as much as a FIFO-worth of data ahead. This | |
937 | * matters for FIFO overruns only. | |
e9c091b4 | 938 | */ |
f5a106d9 | 939 | remain = readl(host->base + MMCIDATACNT); |
8cb28155 LW |
940 | success = data->blksz * data->blocks - remain; |
941 | ||
c8afc9d5 RK |
942 | dev_dbg(mmc_dev(host->mmc), "MCI ERROR IRQ, status 0x%08x at 0x%08x\n", |
943 | status, success); | |
8cb28155 LW |
944 | if (status & MCI_DATACRCFAIL) { |
945 | /* Last block was not successful */ | |
c8afc9d5 | 946 | success -= 1; |
17b0429d | 947 | data->error = -EILSEQ; |
8cb28155 | 948 | } else if (status & MCI_DATATIMEOUT) { |
17b0429d | 949 | data->error = -ETIMEDOUT; |
757df746 LW |
950 | } else if (status & MCI_STARTBITERR) { |
951 | data->error = -ECOMM; | |
c8afc9d5 RK |
952 | } else if (status & MCI_TXUNDERRUN) { |
953 | data->error = -EIO; | |
954 | } else if (status & MCI_RXOVERRUN) { | |
955 | if (success > host->variant->fifosize) | |
956 | success -= host->variant->fifosize; | |
957 | else | |
958 | success = 0; | |
17b0429d | 959 | data->error = -EIO; |
4ce1d6cb | 960 | } |
51d4375d | 961 | data->bytes_xfered = round_down(success, data->blksz); |
1da177e4 | 962 | } |
f20f8f21 | 963 | |
8cb28155 LW |
964 | if (status & MCI_DATABLOCKEND) |
965 | dev_err(mmc_dev(host->mmc), "stray MCI_DATABLOCKEND interrupt\n"); | |
f20f8f21 | 966 | |
ccff9b51 | 967 | if (status & MCI_DATAEND || data->error) { |
c8ebae37 | 968 | if (dma_inprogress(host)) |
653a761e | 969 | mmci_dma_finalize(host, data); |
1da177e4 LT |
970 | mmci_stop_data(host); |
971 | ||
8cb28155 LW |
972 | if (!data->error) |
973 | /* The error clause is handled above, success! */ | |
51d4375d | 974 | data->bytes_xfered = data->blksz * data->blocks; |
f20f8f21 | 975 | |
024629c6 | 976 | if (!data->stop || host->mrq->sbc) { |
1da177e4 LT |
977 | mmci_request_end(host, data->mrq); |
978 | } else { | |
979 | mmci_start_command(host, data->stop, 0); | |
980 | } | |
981 | } | |
982 | } | |
983 | ||
984 | static void | |
985 | mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd, | |
986 | unsigned int status) | |
987 | { | |
988 | void __iomem *base = host->base; | |
ad82bfea UH |
989 | bool sbc, busy_resp; |
990 | ||
991 | if (!cmd) | |
992 | return; | |
993 | ||
994 | sbc = (cmd == host->mrq->sbc); | |
995 | busy_resp = host->variant->busy_detect && (cmd->flags & MMC_RSP_BUSY); | |
996 | ||
997 | if (!((status|host->busy_status) & (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT| | |
998 | MCI_CMDSENT|MCI_CMDRESPEND))) | |
999 | return; | |
8d94b54d UH |
1000 | |
1001 | /* Check if we need to wait for busy completion. */ | |
1002 | if (host->busy_status && (status & MCI_ST_CARDBUSY)) | |
1003 | return; | |
1004 | ||
1005 | /* Enable busy completion if needed and supported. */ | |
1006 | if (!host->busy_status && busy_resp && | |
1007 | !(status & (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT)) && | |
1008 | (readl(base + MMCISTATUS) & MCI_ST_CARDBUSY)) { | |
1009 | writel(readl(base + MMCIMASK0) | MCI_ST_BUSYEND, | |
1010 | base + MMCIMASK0); | |
1011 | host->busy_status = status & (MCI_CMDSENT|MCI_CMDRESPEND); | |
1012 | return; | |
1013 | } | |
1014 | ||
1015 | /* At busy completion, mask the IRQ and complete the request. */ | |
1016 | if (host->busy_status) { | |
1017 | writel(readl(base + MMCIMASK0) & ~MCI_ST_BUSYEND, | |
1018 | base + MMCIMASK0); | |
1019 | host->busy_status = 0; | |
1020 | } | |
1da177e4 LT |
1021 | |
1022 | host->cmd = NULL; | |
1023 | ||
1da177e4 | 1024 | if (status & MCI_CMDTIMEOUT) { |
17b0429d | 1025 | cmd->error = -ETIMEDOUT; |
1da177e4 | 1026 | } else if (status & MCI_CMDCRCFAIL && cmd->flags & MMC_RSP_CRC) { |
17b0429d | 1027 | cmd->error = -EILSEQ; |
9047b435 RKAL |
1028 | } else { |
1029 | cmd->resp[0] = readl(base + MMCIRESPONSE0); | |
1030 | cmd->resp[1] = readl(base + MMCIRESPONSE1); | |
1031 | cmd->resp[2] = readl(base + MMCIRESPONSE2); | |
1032 | cmd->resp[3] = readl(base + MMCIRESPONSE3); | |
1da177e4 LT |
1033 | } |
1034 | ||
024629c6 | 1035 | if ((!sbc && !cmd->data) || cmd->error) { |
3b6e3c73 UH |
1036 | if (host->data) { |
1037 | /* Terminate the DMA transfer */ | |
653a761e | 1038 | if (dma_inprogress(host)) { |
3b6e3c73 | 1039 | mmci_dma_data_error(host); |
653a761e UH |
1040 | mmci_dma_unmap(host, host->data); |
1041 | } | |
e47c222b | 1042 | mmci_stop_data(host); |
3b6e3c73 | 1043 | } |
024629c6 UH |
1044 | mmci_request_end(host, host->mrq); |
1045 | } else if (sbc) { | |
1046 | mmci_start_command(host, host->mrq->cmd, 0); | |
1da177e4 LT |
1047 | } else if (!(cmd->data->flags & MMC_DATA_READ)) { |
1048 | mmci_start_data(host, cmd->data); | |
1049 | } | |
1050 | } | |
1051 | ||
9c34b73d SK |
1052 | static int mmci_get_rx_fifocnt(struct mmci_host *host, u32 status, int remain) |
1053 | { | |
1054 | return remain - (readl(host->base + MMCIFIFOCNT) << 2); | |
1055 | } | |
1056 | ||
1057 | static int mmci_qcom_get_rx_fifocnt(struct mmci_host *host, u32 status, int r) | |
1058 | { | |
1059 | /* | |
1060 | * on qcom SDCC4 only 8 words are used in each burst so only 8 addresses | |
1061 | * from the fifo range should be used | |
1062 | */ | |
1063 | if (status & MCI_RXFIFOHALFFULL) | |
1064 | return host->variant->fifohalfsize; | |
1065 | else if (status & MCI_RXDATAAVLBL) | |
1066 | return 4; | |
1067 | ||
1068 | return 0; | |
1069 | } | |
1070 | ||
1da177e4 LT |
1071 | static int mmci_pio_read(struct mmci_host *host, char *buffer, unsigned int remain) |
1072 | { | |
1073 | void __iomem *base = host->base; | |
1074 | char *ptr = buffer; | |
9c34b73d | 1075 | u32 status = readl(host->base + MMCISTATUS); |
26eed9a5 | 1076 | int host_remain = host->size; |
1da177e4 LT |
1077 | |
1078 | do { | |
9c34b73d | 1079 | int count = host->get_rx_fifocnt(host, status, host_remain); |
1da177e4 LT |
1080 | |
1081 | if (count > remain) | |
1082 | count = remain; | |
1083 | ||
1084 | if (count <= 0) | |
1085 | break; | |
1086 | ||
393e5e24 UH |
1087 | /* |
1088 | * SDIO especially may want to send something that is | |
1089 | * not divisible by 4 (as opposed to card sectors | |
1090 | * etc). Therefore make sure to always read the last bytes | |
1091 | * while only doing full 32-bit reads towards the FIFO. | |
1092 | */ | |
1093 | if (unlikely(count & 0x3)) { | |
1094 | if (count < 4) { | |
1095 | unsigned char buf[4]; | |
4b85da08 | 1096 | ioread32_rep(base + MMCIFIFO, buf, 1); |
393e5e24 UH |
1097 | memcpy(ptr, buf, count); |
1098 | } else { | |
4b85da08 | 1099 | ioread32_rep(base + MMCIFIFO, ptr, count >> 2); |
393e5e24 UH |
1100 | count &= ~0x3; |
1101 | } | |
1102 | } else { | |
4b85da08 | 1103 | ioread32_rep(base + MMCIFIFO, ptr, count >> 2); |
393e5e24 | 1104 | } |
1da177e4 LT |
1105 | |
1106 | ptr += count; | |
1107 | remain -= count; | |
26eed9a5 | 1108 | host_remain -= count; |
1da177e4 LT |
1109 | |
1110 | if (remain == 0) | |
1111 | break; | |
1112 | ||
1113 | status = readl(base + MMCISTATUS); | |
1114 | } while (status & MCI_RXDATAAVLBL); | |
1115 | ||
1116 | return ptr - buffer; | |
1117 | } | |
1118 | ||
1119 | static int mmci_pio_write(struct mmci_host *host, char *buffer, unsigned int remain, u32 status) | |
1120 | { | |
8301bb68 | 1121 | struct variant_data *variant = host->variant; |
1da177e4 LT |
1122 | void __iomem *base = host->base; |
1123 | char *ptr = buffer; | |
1124 | ||
1125 | do { | |
1126 | unsigned int count, maxcnt; | |
1127 | ||
8301bb68 RV |
1128 | maxcnt = status & MCI_TXFIFOEMPTY ? |
1129 | variant->fifosize : variant->fifohalfsize; | |
1da177e4 LT |
1130 | count = min(remain, maxcnt); |
1131 | ||
34177802 LW |
1132 | /* |
1133 | * SDIO especially may want to send something that is | |
1134 | * not divisible by 4 (as opposed to card sectors | |
1135 | * etc), and the FIFO only accept full 32-bit writes. | |
1136 | * So compensate by adding +3 on the count, a single | |
1137 | * byte become a 32bit write, 7 bytes will be two | |
1138 | * 32bit writes etc. | |
1139 | */ | |
4b85da08 | 1140 | iowrite32_rep(base + MMCIFIFO, ptr, (count + 3) >> 2); |
1da177e4 LT |
1141 | |
1142 | ptr += count; | |
1143 | remain -= count; | |
1144 | ||
1145 | if (remain == 0) | |
1146 | break; | |
1147 | ||
1148 | status = readl(base + MMCISTATUS); | |
1149 | } while (status & MCI_TXFIFOHALFEMPTY); | |
1150 | ||
1151 | return ptr - buffer; | |
1152 | } | |
1153 | ||
1154 | /* | |
1155 | * PIO data transfer IRQ handler. | |
1156 | */ | |
7d12e780 | 1157 | static irqreturn_t mmci_pio_irq(int irq, void *dev_id) |
1da177e4 LT |
1158 | { |
1159 | struct mmci_host *host = dev_id; | |
4ce1d6cb | 1160 | struct sg_mapping_iter *sg_miter = &host->sg_miter; |
8301bb68 | 1161 | struct variant_data *variant = host->variant; |
1da177e4 | 1162 | void __iomem *base = host->base; |
4ce1d6cb | 1163 | unsigned long flags; |
1da177e4 LT |
1164 | u32 status; |
1165 | ||
1166 | status = readl(base + MMCISTATUS); | |
1167 | ||
64de0289 | 1168 | dev_dbg(mmc_dev(host->mmc), "irq1 (pio) %08x\n", status); |
1da177e4 | 1169 | |
4ce1d6cb RV |
1170 | local_irq_save(flags); |
1171 | ||
1da177e4 | 1172 | do { |
1da177e4 LT |
1173 | unsigned int remain, len; |
1174 | char *buffer; | |
1175 | ||
1176 | /* | |
1177 | * For write, we only need to test the half-empty flag | |
1178 | * here - if the FIFO is completely empty, then by | |
1179 | * definition it is more than half empty. | |
1180 | * | |
1181 | * For read, check for data available. | |
1182 | */ | |
1183 | if (!(status & (MCI_TXFIFOHALFEMPTY|MCI_RXDATAAVLBL))) | |
1184 | break; | |
1185 | ||
4ce1d6cb RV |
1186 | if (!sg_miter_next(sg_miter)) |
1187 | break; | |
1188 | ||
1189 | buffer = sg_miter->addr; | |
1190 | remain = sg_miter->length; | |
1da177e4 LT |
1191 | |
1192 | len = 0; | |
1193 | if (status & MCI_RXACTIVE) | |
1194 | len = mmci_pio_read(host, buffer, remain); | |
1195 | if (status & MCI_TXACTIVE) | |
1196 | len = mmci_pio_write(host, buffer, remain, status); | |
1197 | ||
4ce1d6cb | 1198 | sg_miter->consumed = len; |
1da177e4 | 1199 | |
1da177e4 LT |
1200 | host->size -= len; |
1201 | remain -= len; | |
1202 | ||
1203 | if (remain) | |
1204 | break; | |
1205 | ||
1da177e4 LT |
1206 | status = readl(base + MMCISTATUS); |
1207 | } while (1); | |
1208 | ||
4ce1d6cb RV |
1209 | sg_miter_stop(sg_miter); |
1210 | ||
1211 | local_irq_restore(flags); | |
1212 | ||
1da177e4 | 1213 | /* |
c4d877c1 RK |
1214 | * If we have less than the fifo 'half-full' threshold to transfer, |
1215 | * trigger a PIO interrupt as soon as any data is available. | |
1da177e4 | 1216 | */ |
c4d877c1 | 1217 | if (status & MCI_RXACTIVE && host->size < variant->fifohalfsize) |
2686b4b4 | 1218 | mmci_set_mask1(host, MCI_RXDATAAVLBLMASK); |
1da177e4 LT |
1219 | |
1220 | /* | |
1221 | * If we run out of data, disable the data IRQs; this | |
1222 | * prevents a race where the FIFO becomes empty before | |
1223 | * the chip itself has disabled the data path, and | |
1224 | * stops us racing with our data end IRQ. | |
1225 | */ | |
1226 | if (host->size == 0) { | |
2686b4b4 | 1227 | mmci_set_mask1(host, 0); |
1da177e4 LT |
1228 | writel(readl(base + MMCIMASK0) | MCI_DATAENDMASK, base + MMCIMASK0); |
1229 | } | |
1230 | ||
1231 | return IRQ_HANDLED; | |
1232 | } | |
1233 | ||
1234 | /* | |
1235 | * Handle completion of command and data transfers. | |
1236 | */ | |
7d12e780 | 1237 | static irqreturn_t mmci_irq(int irq, void *dev_id) |
1da177e4 LT |
1238 | { |
1239 | struct mmci_host *host = dev_id; | |
1240 | u32 status; | |
1241 | int ret = 0; | |
1242 | ||
1243 | spin_lock(&host->lock); | |
1244 | ||
1245 | do { | |
1da177e4 | 1246 | status = readl(host->base + MMCISTATUS); |
2686b4b4 LW |
1247 | |
1248 | if (host->singleirq) { | |
1249 | if (status & readl(host->base + MMCIMASK1)) | |
1250 | mmci_pio_irq(irq, dev_id); | |
1251 | ||
1252 | status &= ~MCI_IRQ1MASK; | |
1253 | } | |
1254 | ||
8d94b54d UH |
1255 | /* |
1256 | * We intentionally clear the MCI_ST_CARDBUSY IRQ here (if it's | |
1257 | * enabled) since the HW seems to be triggering the IRQ on both | |
1258 | * edges while monitoring DAT0 for busy completion. | |
1259 | */ | |
1da177e4 LT |
1260 | status &= readl(host->base + MMCIMASK0); |
1261 | writel(status, host->base + MMCICLEAR); | |
1262 | ||
64de0289 | 1263 | dev_dbg(mmc_dev(host->mmc), "irq0 (data+cmd) %08x\n", status); |
1da177e4 | 1264 | |
7878289b UH |
1265 | if (host->variant->reversed_irq_handling) { |
1266 | mmci_data_irq(host, host->data, status); | |
1267 | mmci_cmd_irq(host, host->cmd, status); | |
1268 | } else { | |
1269 | mmci_cmd_irq(host, host->cmd, status); | |
1270 | mmci_data_irq(host, host->data, status); | |
1271 | } | |
1da177e4 | 1272 | |
8d94b54d UH |
1273 | /* Don't poll for busy completion in irq context. */ |
1274 | if (host->busy_status) | |
1275 | status &= ~MCI_ST_CARDBUSY; | |
1276 | ||
1da177e4 LT |
1277 | ret = 1; |
1278 | } while (status); | |
1279 | ||
1280 | spin_unlock(&host->lock); | |
1281 | ||
1282 | return IRQ_RETVAL(ret); | |
1283 | } | |
1284 | ||
1285 | static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
1286 | { | |
1287 | struct mmci_host *host = mmc_priv(mmc); | |
9e943021 | 1288 | unsigned long flags; |
1da177e4 LT |
1289 | |
1290 | WARN_ON(host->mrq != NULL); | |
1291 | ||
653a761e UH |
1292 | mrq->cmd->error = mmci_validate_data(host, mrq->data); |
1293 | if (mrq->cmd->error) { | |
255d01af PO |
1294 | mmc_request_done(mmc, mrq); |
1295 | return; | |
1296 | } | |
1297 | ||
1c3be369 RK |
1298 | pm_runtime_get_sync(mmc_dev(mmc)); |
1299 | ||
9e943021 | 1300 | spin_lock_irqsave(&host->lock, flags); |
1da177e4 LT |
1301 | |
1302 | host->mrq = mrq; | |
1303 | ||
58c7ccbf PF |
1304 | if (mrq->data) |
1305 | mmci_get_next_data(host, mrq->data); | |
1306 | ||
1da177e4 LT |
1307 | if (mrq->data && mrq->data->flags & MMC_DATA_READ) |
1308 | mmci_start_data(host, mrq->data); | |
1309 | ||
024629c6 UH |
1310 | if (mrq->sbc) |
1311 | mmci_start_command(host, mrq->sbc, 0); | |
1312 | else | |
1313 | mmci_start_command(host, mrq->cmd, 0); | |
1da177e4 | 1314 | |
9e943021 | 1315 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 LT |
1316 | } |
1317 | ||
1318 | static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
1319 | { | |
1320 | struct mmci_host *host = mmc_priv(mmc); | |
7d72a1d4 | 1321 | struct variant_data *variant = host->variant; |
a6a6464a LW |
1322 | u32 pwr = 0; |
1323 | unsigned long flags; | |
db90f91f | 1324 | int ret; |
1da177e4 | 1325 | |
2cd976c4 UH |
1326 | pm_runtime_get_sync(mmc_dev(mmc)); |
1327 | ||
bc521818 UH |
1328 | if (host->plat->ios_handler && |
1329 | host->plat->ios_handler(mmc_dev(mmc), ios)) | |
1330 | dev_err(mmc_dev(mmc), "platform ios_handler failed\n"); | |
1331 | ||
1da177e4 LT |
1332 | switch (ios->power_mode) { |
1333 | case MMC_POWER_OFF: | |
599c1d5c UH |
1334 | if (!IS_ERR(mmc->supply.vmmc)) |
1335 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); | |
237fb5e6 | 1336 | |
7c0136ef | 1337 | if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) { |
237fb5e6 | 1338 | regulator_disable(mmc->supply.vqmmc); |
7c0136ef UH |
1339 | host->vqmmc_enabled = false; |
1340 | } | |
237fb5e6 | 1341 | |
1da177e4 LT |
1342 | break; |
1343 | case MMC_POWER_UP: | |
599c1d5c UH |
1344 | if (!IS_ERR(mmc->supply.vmmc)) |
1345 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, ios->vdd); | |
1346 | ||
7d72a1d4 UH |
1347 | /* |
1348 | * The ST Micro variant doesn't have the PL180s MCI_PWR_UP | |
1349 | * and instead uses MCI_PWR_ON so apply whatever value is | |
1350 | * configured in the variant data. | |
1351 | */ | |
1352 | pwr |= variant->pwrreg_powerup; | |
1353 | ||
1354 | break; | |
1da177e4 | 1355 | case MMC_POWER_ON: |
7c0136ef | 1356 | if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) { |
db90f91f LJ |
1357 | ret = regulator_enable(mmc->supply.vqmmc); |
1358 | if (ret < 0) | |
1359 | dev_err(mmc_dev(mmc), | |
1360 | "failed to enable vqmmc regulator\n"); | |
7c0136ef UH |
1361 | else |
1362 | host->vqmmc_enabled = true; | |
db90f91f | 1363 | } |
237fb5e6 | 1364 | |
1da177e4 LT |
1365 | pwr |= MCI_PWR_ON; |
1366 | break; | |
1367 | } | |
1368 | ||
4d1a3a0d UH |
1369 | if (variant->signal_direction && ios->power_mode != MMC_POWER_OFF) { |
1370 | /* | |
1371 | * The ST Micro variant has some additional bits | |
1372 | * indicating signal direction for the signals in | |
1373 | * the SD/MMC bus and feedback-clock usage. | |
1374 | */ | |
4593df29 | 1375 | pwr |= host->pwr_reg_add; |
4d1a3a0d UH |
1376 | |
1377 | if (ios->bus_width == MMC_BUS_WIDTH_4) | |
1378 | pwr &= ~MCI_ST_DATA74DIREN; | |
1379 | else if (ios->bus_width == MMC_BUS_WIDTH_1) | |
1380 | pwr &= (~MCI_ST_DATA74DIREN & | |
1381 | ~MCI_ST_DATA31DIREN & | |
1382 | ~MCI_ST_DATA2DIREN); | |
1383 | } | |
1384 | ||
cc30d60e | 1385 | if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) { |
f17a1f06 | 1386 | if (host->hw_designer != AMBA_VENDOR_ST) |
cc30d60e LW |
1387 | pwr |= MCI_ROD; |
1388 | else { | |
1389 | /* | |
1390 | * The ST Micro variant use the ROD bit for something | |
1391 | * else and only has OD (Open Drain). | |
1392 | */ | |
1393 | pwr |= MCI_OD; | |
1394 | } | |
1395 | } | |
1da177e4 | 1396 | |
f4670dae UH |
1397 | /* |
1398 | * If clock = 0 and the variant requires the MMCIPOWER to be used for | |
1399 | * gating the clock, the MCI_PWR_ON bit is cleared. | |
1400 | */ | |
1401 | if (!ios->clock && variant->pwrreg_clkgate) | |
1402 | pwr &= ~MCI_PWR_ON; | |
1403 | ||
3f4e6f7b SK |
1404 | if (host->variant->explicit_mclk_control && |
1405 | ios->clock != host->clock_cache) { | |
1406 | ret = clk_set_rate(host->clk, ios->clock); | |
1407 | if (ret < 0) | |
1408 | dev_err(mmc_dev(host->mmc), | |
1409 | "Error setting clock rate (%d)\n", ret); | |
1410 | else | |
1411 | host->mclk = clk_get_rate(host->clk); | |
1412 | } | |
1413 | host->clock_cache = ios->clock; | |
1414 | ||
a6a6464a LW |
1415 | spin_lock_irqsave(&host->lock, flags); |
1416 | ||
1417 | mmci_set_clkreg(host, ios->clock); | |
7437cfa5 | 1418 | mmci_write_pwrreg(host, pwr); |
f829c042 | 1419 | mmci_reg_delay(host); |
a6a6464a LW |
1420 | |
1421 | spin_unlock_irqrestore(&host->lock, flags); | |
2cd976c4 | 1422 | |
2cd976c4 UH |
1423 | pm_runtime_mark_last_busy(mmc_dev(mmc)); |
1424 | pm_runtime_put_autosuspend(mmc_dev(mmc)); | |
1da177e4 LT |
1425 | } |
1426 | ||
89001446 RK |
1427 | static int mmci_get_cd(struct mmc_host *mmc) |
1428 | { | |
1429 | struct mmci_host *host = mmc_priv(mmc); | |
29719445 | 1430 | struct mmci_platform_data *plat = host->plat; |
d2762090 | 1431 | unsigned int status = mmc_gpio_get_cd(mmc); |
89001446 | 1432 | |
d2762090 | 1433 | if (status == -ENOSYS) { |
4b8caec0 RV |
1434 | if (!plat->status) |
1435 | return 1; /* Assume always present */ | |
1436 | ||
29719445 | 1437 | status = plat->status(mmc_dev(host->mmc)); |
d2762090 | 1438 | } |
74bc8093 | 1439 | return status; |
89001446 RK |
1440 | } |
1441 | ||
0f3ed7f7 UH |
1442 | static int mmci_sig_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios) |
1443 | { | |
1444 | int ret = 0; | |
1445 | ||
1446 | if (!IS_ERR(mmc->supply.vqmmc)) { | |
1447 | ||
1448 | pm_runtime_get_sync(mmc_dev(mmc)); | |
1449 | ||
1450 | switch (ios->signal_voltage) { | |
1451 | case MMC_SIGNAL_VOLTAGE_330: | |
1452 | ret = regulator_set_voltage(mmc->supply.vqmmc, | |
1453 | 2700000, 3600000); | |
1454 | break; | |
1455 | case MMC_SIGNAL_VOLTAGE_180: | |
1456 | ret = regulator_set_voltage(mmc->supply.vqmmc, | |
1457 | 1700000, 1950000); | |
1458 | break; | |
1459 | case MMC_SIGNAL_VOLTAGE_120: | |
1460 | ret = regulator_set_voltage(mmc->supply.vqmmc, | |
1461 | 1100000, 1300000); | |
1462 | break; | |
1463 | } | |
1464 | ||
1465 | if (ret) | |
1466 | dev_warn(mmc_dev(mmc), "Voltage switch failed\n"); | |
1467 | ||
1468 | pm_runtime_mark_last_busy(mmc_dev(mmc)); | |
1469 | pm_runtime_put_autosuspend(mmc_dev(mmc)); | |
1470 | } | |
1471 | ||
1472 | return ret; | |
1473 | } | |
1474 | ||
01259620 | 1475 | static struct mmc_host_ops mmci_ops = { |
1da177e4 | 1476 | .request = mmci_request, |
58c7ccbf PF |
1477 | .pre_req = mmci_pre_request, |
1478 | .post_req = mmci_post_request, | |
1da177e4 | 1479 | .set_ios = mmci_set_ios, |
d2762090 | 1480 | .get_ro = mmc_gpio_get_ro, |
89001446 | 1481 | .get_cd = mmci_get_cd, |
0f3ed7f7 | 1482 | .start_signal_voltage_switch = mmci_sig_volt_switch, |
1da177e4 LT |
1483 | }; |
1484 | ||
4593df29 | 1485 | static int mmci_of_parse(struct device_node *np, struct mmc_host *mmc) |
000bc9d5 | 1486 | { |
4593df29 UH |
1487 | struct mmci_host *host = mmc_priv(mmc); |
1488 | int ret = mmc_of_parse(mmc); | |
1489 | ||
1490 | if (ret) | |
1491 | return ret; | |
1492 | ||
ae94cafe | 1493 | if (of_get_property(np, "st,sig-dir-dat0", NULL)) |
4593df29 | 1494 | host->pwr_reg_add |= MCI_ST_DATA0DIREN; |
ae94cafe | 1495 | if (of_get_property(np, "st,sig-dir-dat2", NULL)) |
4593df29 | 1496 | host->pwr_reg_add |= MCI_ST_DATA2DIREN; |
ae94cafe | 1497 | if (of_get_property(np, "st,sig-dir-dat31", NULL)) |
4593df29 | 1498 | host->pwr_reg_add |= MCI_ST_DATA31DIREN; |
ae94cafe | 1499 | if (of_get_property(np, "st,sig-dir-dat74", NULL)) |
4593df29 | 1500 | host->pwr_reg_add |= MCI_ST_DATA74DIREN; |
ae94cafe | 1501 | if (of_get_property(np, "st,sig-dir-cmd", NULL)) |
4593df29 | 1502 | host->pwr_reg_add |= MCI_ST_CMDDIREN; |
1a7e99c1 | 1503 | if (of_get_property(np, "st,sig-pin-fbclk", NULL)) |
4593df29 | 1504 | host->pwr_reg_add |= MCI_ST_FBCLKEN; |
000bc9d5 LJ |
1505 | |
1506 | if (of_get_property(np, "mmc-cap-mmc-highspeed", NULL)) | |
78f87df2 | 1507 | mmc->caps |= MMC_CAP_MMC_HIGHSPEED; |
000bc9d5 | 1508 | if (of_get_property(np, "mmc-cap-sd-highspeed", NULL)) |
78f87df2 | 1509 | mmc->caps |= MMC_CAP_SD_HIGHSPEED; |
000bc9d5 | 1510 | |
78f87df2 | 1511 | return 0; |
c0a120a4 | 1512 | } |
000bc9d5 | 1513 | |
c3be1efd | 1514 | static int mmci_probe(struct amba_device *dev, |
aa25afad | 1515 | const struct amba_id *id) |
1da177e4 | 1516 | { |
6ef297f8 | 1517 | struct mmci_platform_data *plat = dev->dev.platform_data; |
000bc9d5 | 1518 | struct device_node *np = dev->dev.of_node; |
4956e109 | 1519 | struct variant_data *variant = id->data; |
1da177e4 LT |
1520 | struct mmci_host *host; |
1521 | struct mmc_host *mmc; | |
1522 | int ret; | |
1523 | ||
000bc9d5 LJ |
1524 | /* Must have platform data or Device Tree. */ |
1525 | if (!plat && !np) { | |
1526 | dev_err(&dev->dev, "No plat data or DT found\n"); | |
1527 | return -EINVAL; | |
1da177e4 LT |
1528 | } |
1529 | ||
b9b52918 LJ |
1530 | if (!plat) { |
1531 | plat = devm_kzalloc(&dev->dev, sizeof(*plat), GFP_KERNEL); | |
1532 | if (!plat) | |
1533 | return -ENOMEM; | |
1534 | } | |
1535 | ||
1da177e4 | 1536 | mmc = mmc_alloc_host(sizeof(struct mmci_host), &dev->dev); |
ef289982 UH |
1537 | if (!mmc) |
1538 | return -ENOMEM; | |
1da177e4 | 1539 | |
78f87df2 UH |
1540 | ret = mmci_of_parse(np, mmc); |
1541 | if (ret) | |
1542 | goto host_free; | |
1543 | ||
1da177e4 | 1544 | host = mmc_priv(mmc); |
4ea580f1 | 1545 | host->mmc = mmc; |
012b7d33 RK |
1546 | |
1547 | host->hw_designer = amba_manf(dev); | |
1548 | host->hw_revision = amba_rev(dev); | |
64de0289 LW |
1549 | dev_dbg(mmc_dev(mmc), "designer ID = 0x%02x\n", host->hw_designer); |
1550 | dev_dbg(mmc_dev(mmc), "revision = 0x%01x\n", host->hw_revision); | |
012b7d33 | 1551 | |
665ba56f | 1552 | host->clk = devm_clk_get(&dev->dev, NULL); |
1da177e4 LT |
1553 | if (IS_ERR(host->clk)) { |
1554 | ret = PTR_ERR(host->clk); | |
1da177e4 LT |
1555 | goto host_free; |
1556 | } | |
1557 | ||
ac940938 | 1558 | ret = clk_prepare_enable(host->clk); |
1da177e4 | 1559 | if (ret) |
665ba56f | 1560 | goto host_free; |
1da177e4 | 1561 | |
9c34b73d SK |
1562 | if (variant->qcom_fifo) |
1563 | host->get_rx_fifocnt = mmci_qcom_get_rx_fifocnt; | |
1564 | else | |
1565 | host->get_rx_fifocnt = mmci_get_rx_fifocnt; | |
1566 | ||
1da177e4 | 1567 | host->plat = plat; |
4956e109 | 1568 | host->variant = variant; |
1da177e4 | 1569 | host->mclk = clk_get_rate(host->clk); |
c8df9a53 LW |
1570 | /* |
1571 | * According to the spec, mclk is max 100 MHz, | |
1572 | * so we try to adjust the clock down to this, | |
1573 | * (if possible). | |
1574 | */ | |
dc6500bf SK |
1575 | if (host->mclk > variant->f_max) { |
1576 | ret = clk_set_rate(host->clk, variant->f_max); | |
c8df9a53 LW |
1577 | if (ret < 0) |
1578 | goto clk_disable; | |
1579 | host->mclk = clk_get_rate(host->clk); | |
64de0289 LW |
1580 | dev_dbg(mmc_dev(mmc), "eventual mclk rate: %u Hz\n", |
1581 | host->mclk); | |
c8df9a53 | 1582 | } |
ef289982 | 1583 | |
c8ebae37 | 1584 | host->phybase = dev->res.start; |
ef289982 UH |
1585 | host->base = devm_ioremap_resource(&dev->dev, &dev->res); |
1586 | if (IS_ERR(host->base)) { | |
1587 | ret = PTR_ERR(host->base); | |
1da177e4 LT |
1588 | goto clk_disable; |
1589 | } | |
1590 | ||
7f294e49 LW |
1591 | /* |
1592 | * The ARM and ST versions of the block have slightly different | |
1593 | * clock divider equations which means that the minimum divider | |
1594 | * differs too. | |
3f4e6f7b | 1595 | * on Qualcomm like controllers get the nearest minimum clock to 100Khz |
7f294e49 LW |
1596 | */ |
1597 | if (variant->st_clkdiv) | |
1598 | mmc->f_min = DIV_ROUND_UP(host->mclk, 257); | |
3f4e6f7b SK |
1599 | else if (variant->explicit_mclk_control) |
1600 | mmc->f_min = clk_round_rate(host->clk, 100000); | |
7f294e49 LW |
1601 | else |
1602 | mmc->f_min = DIV_ROUND_UP(host->mclk, 512); | |
808d97cc | 1603 | /* |
78f87df2 UH |
1604 | * If no maximum operating frequency is supplied, fall back to use |
1605 | * the module parameter, which has a (low) default value in case it | |
1606 | * is not specified. Either value must not exceed the clock rate into | |
5080a08d | 1607 | * the block, of course. |
808d97cc | 1608 | */ |
78f87df2 | 1609 | if (mmc->f_max) |
3f4e6f7b SK |
1610 | mmc->f_max = variant->explicit_mclk_control ? |
1611 | min(variant->f_max, mmc->f_max) : | |
1612 | min(host->mclk, mmc->f_max); | |
808d97cc | 1613 | else |
3f4e6f7b SK |
1614 | mmc->f_max = variant->explicit_mclk_control ? |
1615 | fmax : min(host->mclk, fmax); | |
1616 | ||
1617 | ||
64de0289 LW |
1618 | dev_dbg(mmc_dev(mmc), "clocking block at %u Hz\n", mmc->f_max); |
1619 | ||
599c1d5c UH |
1620 | /* Get regulators and the supported OCR mask */ |
1621 | mmc_regulator_get_supply(mmc); | |
1622 | if (!mmc->ocr_avail) | |
34e84f39 | 1623 | mmc->ocr_avail = plat->ocr_mask; |
599c1d5c UH |
1624 | else if (plat->ocr_mask) |
1625 | dev_warn(mmc_dev(mmc), "Platform OCR mask is ignored\n"); | |
1626 | ||
78f87df2 | 1627 | /* DT takes precedence over platform data. */ |
78f87df2 UH |
1628 | if (!np) { |
1629 | if (!plat->cd_invert) | |
1630 | mmc->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH; | |
1631 | mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH; | |
1632 | } | |
1da177e4 | 1633 | |
9dd8a8b8 UH |
1634 | /* We support these capabilities. */ |
1635 | mmc->caps |= MMC_CAP_CMD23; | |
1636 | ||
8d94b54d UH |
1637 | if (variant->busy_detect) { |
1638 | mmci_ops.card_busy = mmci_card_busy; | |
1639 | mmci_write_datactrlreg(host, MCI_ST_DPSM_BUSYMODE); | |
1640 | mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY; | |
1641 | mmc->max_busy_timeout = 0; | |
1642 | } | |
1643 | ||
1644 | mmc->ops = &mmci_ops; | |
1645 | ||
70be208f | 1646 | /* We support these PM capabilities. */ |
78f87df2 | 1647 | mmc->pm_caps |= MMC_PM_KEEP_POWER; |
70be208f | 1648 | |
1da177e4 LT |
1649 | /* |
1650 | * We can do SGIO | |
1651 | */ | |
a36274e0 | 1652 | mmc->max_segs = NR_SG; |
1da177e4 LT |
1653 | |
1654 | /* | |
08458ef6 RV |
1655 | * Since only a certain number of bits are valid in the data length |
1656 | * register, we must ensure that we don't exceed 2^num-1 bytes in a | |
1657 | * single request. | |
1da177e4 | 1658 | */ |
08458ef6 | 1659 | mmc->max_req_size = (1 << variant->datalength_bits) - 1; |
1da177e4 LT |
1660 | |
1661 | /* | |
1662 | * Set the maximum segment size. Since we aren't doing DMA | |
1663 | * (yet) we are only limited by the data length register. | |
1664 | */ | |
55db890a | 1665 | mmc->max_seg_size = mmc->max_req_size; |
1da177e4 | 1666 | |
fe4a3c7a PO |
1667 | /* |
1668 | * Block size can be up to 2048 bytes, but must be a power of two. | |
1669 | */ | |
8f7f6b7e | 1670 | mmc->max_blk_size = 1 << 11; |
fe4a3c7a | 1671 | |
55db890a | 1672 | /* |
8f7f6b7e WD |
1673 | * Limit the number of blocks transferred so that we don't overflow |
1674 | * the maximum request size. | |
55db890a | 1675 | */ |
8f7f6b7e | 1676 | mmc->max_blk_count = mmc->max_req_size >> 11; |
55db890a | 1677 | |
1da177e4 LT |
1678 | spin_lock_init(&host->lock); |
1679 | ||
1680 | writel(0, host->base + MMCIMASK0); | |
1681 | writel(0, host->base + MMCIMASK1); | |
1682 | writel(0xfff, host->base + MMCICLEAR); | |
1683 | ||
ce437aa4 LW |
1684 | /* |
1685 | * If: | |
1686 | * - not using DT but using a descriptor table, or | |
1687 | * - using a table of descriptors ALONGSIDE DT, or | |
1688 | * look up these descriptors named "cd" and "wp" right here, fail | |
1689 | * silently of these do not exist and proceed to try platform data | |
1690 | */ | |
1691 | if (!np) { | |
89168b48 | 1692 | ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0, NULL); |
ce437aa4 LW |
1693 | if (ret < 0) { |
1694 | if (ret == -EPROBE_DEFER) | |
1695 | goto clk_disable; | |
1696 | else if (gpio_is_valid(plat->gpio_cd)) { | |
1697 | ret = mmc_gpio_request_cd(mmc, plat->gpio_cd, 0); | |
1698 | if (ret) | |
1699 | goto clk_disable; | |
1700 | } | |
1701 | } | |
1702 | ||
89168b48 | 1703 | ret = mmc_gpiod_request_ro(mmc, "wp", 0, false, 0, NULL); |
ce437aa4 LW |
1704 | if (ret < 0) { |
1705 | if (ret == -EPROBE_DEFER) | |
1706 | goto clk_disable; | |
1707 | else if (gpio_is_valid(plat->gpio_wp)) { | |
1708 | ret = mmc_gpio_request_ro(mmc, plat->gpio_wp); | |
1709 | if (ret) | |
1710 | goto clk_disable; | |
1711 | } | |
1712 | } | |
89001446 RK |
1713 | } |
1714 | ||
ef289982 UH |
1715 | ret = devm_request_irq(&dev->dev, dev->irq[0], mmci_irq, IRQF_SHARED, |
1716 | DRIVER_NAME " (cmd)", host); | |
1da177e4 | 1717 | if (ret) |
ef289982 | 1718 | goto clk_disable; |
1da177e4 | 1719 | |
dfb85185 | 1720 | if (!dev->irq[1]) |
2686b4b4 LW |
1721 | host->singleirq = true; |
1722 | else { | |
ef289982 UH |
1723 | ret = devm_request_irq(&dev->dev, dev->irq[1], mmci_pio_irq, |
1724 | IRQF_SHARED, DRIVER_NAME " (pio)", host); | |
2686b4b4 | 1725 | if (ret) |
ef289982 | 1726 | goto clk_disable; |
2686b4b4 | 1727 | } |
1da177e4 | 1728 | |
8cb28155 | 1729 | writel(MCI_IRQENABLE, host->base + MMCIMASK0); |
1da177e4 LT |
1730 | |
1731 | amba_set_drvdata(dev, mmc); | |
1732 | ||
c8ebae37 RK |
1733 | dev_info(&dev->dev, "%s: PL%03x manf %x rev%u at 0x%08llx irq %d,%d (pio)\n", |
1734 | mmc_hostname(mmc), amba_part(dev), amba_manf(dev), | |
1735 | amba_rev(dev), (unsigned long long)dev->res.start, | |
1736 | dev->irq[0], dev->irq[1]); | |
1737 | ||
1738 | mmci_dma_setup(host); | |
1da177e4 | 1739 | |
2cd976c4 UH |
1740 | pm_runtime_set_autosuspend_delay(&dev->dev, 50); |
1741 | pm_runtime_use_autosuspend(&dev->dev); | |
1c3be369 RK |
1742 | pm_runtime_put(&dev->dev); |
1743 | ||
8c11a94d RK |
1744 | mmc_add_host(mmc); |
1745 | ||
1da177e4 LT |
1746 | return 0; |
1747 | ||
1da177e4 | 1748 | clk_disable: |
ac940938 | 1749 | clk_disable_unprepare(host->clk); |
1da177e4 LT |
1750 | host_free: |
1751 | mmc_free_host(mmc); | |
1da177e4 LT |
1752 | return ret; |
1753 | } | |
1754 | ||
6e0ee714 | 1755 | static int mmci_remove(struct amba_device *dev) |
1da177e4 LT |
1756 | { |
1757 | struct mmc_host *mmc = amba_get_drvdata(dev); | |
1758 | ||
1da177e4 LT |
1759 | if (mmc) { |
1760 | struct mmci_host *host = mmc_priv(mmc); | |
1761 | ||
1c3be369 RK |
1762 | /* |
1763 | * Undo pm_runtime_put() in probe. We use the _sync | |
1764 | * version here so that we can access the primecell. | |
1765 | */ | |
1766 | pm_runtime_get_sync(&dev->dev); | |
1767 | ||
1da177e4 LT |
1768 | mmc_remove_host(mmc); |
1769 | ||
1770 | writel(0, host->base + MMCIMASK0); | |
1771 | writel(0, host->base + MMCIMASK1); | |
1772 | ||
1773 | writel(0, host->base + MMCICOMMAND); | |
1774 | writel(0, host->base + MMCIDATACTRL); | |
1775 | ||
c8ebae37 | 1776 | mmci_dma_release(host); |
ac940938 | 1777 | clk_disable_unprepare(host->clk); |
1da177e4 | 1778 | mmc_free_host(mmc); |
1da177e4 LT |
1779 | } |
1780 | ||
1781 | return 0; | |
1782 | } | |
1783 | ||
571dce4f | 1784 | #ifdef CONFIG_PM |
1ff44433 UH |
1785 | static void mmci_save(struct mmci_host *host) |
1786 | { | |
1787 | unsigned long flags; | |
1788 | ||
42dcc89a | 1789 | spin_lock_irqsave(&host->lock, flags); |
1ff44433 | 1790 | |
42dcc89a UH |
1791 | writel(0, host->base + MMCIMASK0); |
1792 | if (host->variant->pwrreg_nopower) { | |
1ff44433 UH |
1793 | writel(0, host->base + MMCIDATACTRL); |
1794 | writel(0, host->base + MMCIPOWER); | |
1795 | writel(0, host->base + MMCICLOCK); | |
1ff44433 | 1796 | } |
42dcc89a | 1797 | mmci_reg_delay(host); |
1ff44433 | 1798 | |
42dcc89a | 1799 | spin_unlock_irqrestore(&host->lock, flags); |
1ff44433 UH |
1800 | } |
1801 | ||
1802 | static void mmci_restore(struct mmci_host *host) | |
1803 | { | |
1804 | unsigned long flags; | |
1805 | ||
42dcc89a | 1806 | spin_lock_irqsave(&host->lock, flags); |
1ff44433 | 1807 | |
42dcc89a | 1808 | if (host->variant->pwrreg_nopower) { |
1ff44433 UH |
1809 | writel(host->clk_reg, host->base + MMCICLOCK); |
1810 | writel(host->datactrl_reg, host->base + MMCIDATACTRL); | |
1811 | writel(host->pwr_reg, host->base + MMCIPOWER); | |
1ff44433 | 1812 | } |
42dcc89a UH |
1813 | writel(MCI_IRQENABLE, host->base + MMCIMASK0); |
1814 | mmci_reg_delay(host); | |
1815 | ||
1816 | spin_unlock_irqrestore(&host->lock, flags); | |
1ff44433 UH |
1817 | } |
1818 | ||
8259293a UH |
1819 | static int mmci_runtime_suspend(struct device *dev) |
1820 | { | |
1821 | struct amba_device *adev = to_amba_device(dev); | |
1822 | struct mmc_host *mmc = amba_get_drvdata(adev); | |
1823 | ||
1824 | if (mmc) { | |
1825 | struct mmci_host *host = mmc_priv(mmc); | |
e36bd9c6 | 1826 | pinctrl_pm_select_sleep_state(dev); |
1ff44433 | 1827 | mmci_save(host); |
8259293a UH |
1828 | clk_disable_unprepare(host->clk); |
1829 | } | |
1830 | ||
1831 | return 0; | |
1832 | } | |
1833 | ||
1834 | static int mmci_runtime_resume(struct device *dev) | |
1835 | { | |
1836 | struct amba_device *adev = to_amba_device(dev); | |
1837 | struct mmc_host *mmc = amba_get_drvdata(adev); | |
1838 | ||
1839 | if (mmc) { | |
1840 | struct mmci_host *host = mmc_priv(mmc); | |
1841 | clk_prepare_enable(host->clk); | |
1ff44433 | 1842 | mmci_restore(host); |
e36bd9c6 | 1843 | pinctrl_pm_select_default_state(dev); |
8259293a UH |
1844 | } |
1845 | ||
1846 | return 0; | |
1847 | } | |
1848 | #endif | |
1849 | ||
48fa7003 | 1850 | static const struct dev_pm_ops mmci_dev_pm_ops = { |
f3737fa3 UH |
1851 | SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, |
1852 | pm_runtime_force_resume) | |
6ed23b80 | 1853 | SET_RUNTIME_PM_OPS(mmci_runtime_suspend, mmci_runtime_resume, NULL) |
48fa7003 UH |
1854 | }; |
1855 | ||
1da177e4 LT |
1856 | static struct amba_id mmci_ids[] = { |
1857 | { | |
1858 | .id = 0x00041180, | |
768fbc18 | 1859 | .mask = 0xff0fffff, |
4956e109 | 1860 | .data = &variant_arm, |
1da177e4 | 1861 | }, |
768fbc18 PM |
1862 | { |
1863 | .id = 0x01041180, | |
1864 | .mask = 0xff0fffff, | |
1865 | .data = &variant_arm_extended_fifo, | |
1866 | }, | |
3a37298a PM |
1867 | { |
1868 | .id = 0x02041180, | |
1869 | .mask = 0xff0fffff, | |
1870 | .data = &variant_arm_extended_fifo_hwfc, | |
1871 | }, | |
1da177e4 LT |
1872 | { |
1873 | .id = 0x00041181, | |
1874 | .mask = 0x000fffff, | |
4956e109 | 1875 | .data = &variant_arm, |
1da177e4 | 1876 | }, |
cc30d60e LW |
1877 | /* ST Micro variants */ |
1878 | { | |
1879 | .id = 0x00180180, | |
1880 | .mask = 0x00ffffff, | |
4956e109 | 1881 | .data = &variant_u300, |
cc30d60e | 1882 | }, |
34fd4213 LW |
1883 | { |
1884 | .id = 0x10180180, | |
1885 | .mask = 0xf0ffffff, | |
1886 | .data = &variant_nomadik, | |
1887 | }, | |
cc30d60e LW |
1888 | { |
1889 | .id = 0x00280180, | |
1890 | .mask = 0x00ffffff, | |
4956e109 RV |
1891 | .data = &variant_u300, |
1892 | }, | |
1893 | { | |
1894 | .id = 0x00480180, | |
1784b157 | 1895 | .mask = 0xf0ffffff, |
4956e109 | 1896 | .data = &variant_ux500, |
cc30d60e | 1897 | }, |
1784b157 PL |
1898 | { |
1899 | .id = 0x10480180, | |
1900 | .mask = 0xf0ffffff, | |
1901 | .data = &variant_ux500v2, | |
1902 | }, | |
55b604ae SK |
1903 | /* Qualcomm variants */ |
1904 | { | |
1905 | .id = 0x00051180, | |
1906 | .mask = 0x000fffff, | |
1907 | .data = &variant_qcom, | |
1908 | }, | |
1da177e4 LT |
1909 | { 0, 0 }, |
1910 | }; | |
1911 | ||
9f99835f DM |
1912 | MODULE_DEVICE_TABLE(amba, mmci_ids); |
1913 | ||
1da177e4 LT |
1914 | static struct amba_driver mmci_driver = { |
1915 | .drv = { | |
1916 | .name = DRIVER_NAME, | |
48fa7003 | 1917 | .pm = &mmci_dev_pm_ops, |
1da177e4 LT |
1918 | }, |
1919 | .probe = mmci_probe, | |
0433c143 | 1920 | .remove = mmci_remove, |
1da177e4 LT |
1921 | .id_table = mmci_ids, |
1922 | }; | |
1923 | ||
9e5ed094 | 1924 | module_amba_driver(mmci_driver); |
1da177e4 | 1925 | |
1da177e4 LT |
1926 | module_param(fmax, uint, 0444); |
1927 | ||
1928 | MODULE_DESCRIPTION("ARM PrimeCell PL180/181 Multimedia Card Interface driver"); | |
1929 | MODULE_LICENSE("GPL"); |