Commit | Line | Data |
---|---|---|
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> | |
16 | #include <linux/interrupt.h> | |
613b152c | 17 | #include <linux/kernel.h> |
000bc9d5 | 18 | #include <linux/slab.h> |
1da177e4 LT |
19 | #include <linux/delay.h> |
20 | #include <linux/err.h> | |
21 | #include <linux/highmem.h> | |
019a5f56 | 22 | #include <linux/log2.h> |
70be208f | 23 | #include <linux/mmc/pm.h> |
1da177e4 | 24 | #include <linux/mmc/host.h> |
34177802 | 25 | #include <linux/mmc/card.h> |
a62c80e5 | 26 | #include <linux/amba/bus.h> |
f8ce2547 | 27 | #include <linux/clk.h> |
bd6dee6f | 28 | #include <linux/scatterlist.h> |
89001446 | 29 | #include <linux/gpio.h> |
9a597016 | 30 | #include <linux/of_gpio.h> |
34e84f39 | 31 | #include <linux/regulator/consumer.h> |
c8ebae37 RK |
32 | #include <linux/dmaengine.h> |
33 | #include <linux/dma-mapping.h> | |
34 | #include <linux/amba/mmci.h> | |
1c3be369 | 35 | #include <linux/pm_runtime.h> |
258aea76 | 36 | #include <linux/types.h> |
a9a83785 | 37 | #include <linux/pinctrl/consumer.h> |
1da177e4 | 38 | |
7b09cdac | 39 | #include <asm/div64.h> |
1da177e4 | 40 | #include <asm/io.h> |
c6b8fdad | 41 | #include <asm/sizes.h> |
1da177e4 LT |
42 | |
43 | #include "mmci.h" | |
44 | ||
45 | #define DRIVER_NAME "mmci-pl18x" | |
46 | ||
1da177e4 LT |
47 | static unsigned int fmax = 515633; |
48 | ||
4956e109 RV |
49 | /** |
50 | * struct variant_data - MMCI variant-specific quirks | |
51 | * @clkreg: default value for MCICLOCK register | |
4380c14f | 52 | * @clkreg_enable: enable value for MMCICLOCK register |
08458ef6 | 53 | * @datalength_bits: number of bits in the MMCIDATALENGTH register |
8301bb68 RV |
54 | * @fifosize: number of bytes that can be written when MMCI_TXFIFOEMPTY |
55 | * is asserted (likewise for RX) | |
56 | * @fifohalfsize: number of bytes that can be written when MCI_TXFIFOHALFEMPTY | |
57 | * is asserted (likewise for RX) | |
34177802 | 58 | * @sdio: variant supports SDIO |
b70a67f9 | 59 | * @st_clkdiv: true if using a ST-specific clock divider algorithm |
1784b157 | 60 | * @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register |
7d72a1d4 | 61 | * @pwrreg_powerup: power up value for MMCIPOWER register |
4d1a3a0d | 62 | * @signal_direction: input/out direction of bus signals can be indicated |
f4670dae | 63 | * @pwrreg_clkgate: MMCIPOWER register must be used to gate the clock |
01259620 | 64 | * @busy_detect: true if busy detection on dat0 is supported |
1ff44433 | 65 | * @pwrreg_nopower: bits in MMCIPOWER don't controls ext. power supply |
4956e109 RV |
66 | */ |
67 | struct variant_data { | |
68 | unsigned int clkreg; | |
4380c14f | 69 | unsigned int clkreg_enable; |
08458ef6 | 70 | unsigned int datalength_bits; |
8301bb68 RV |
71 | unsigned int fifosize; |
72 | unsigned int fifohalfsize; | |
34177802 | 73 | bool sdio; |
b70a67f9 | 74 | bool st_clkdiv; |
1784b157 | 75 | bool blksz_datactrl16; |
7d72a1d4 | 76 | u32 pwrreg_powerup; |
4d1a3a0d | 77 | bool signal_direction; |
f4670dae | 78 | bool pwrreg_clkgate; |
01259620 | 79 | bool busy_detect; |
1ff44433 | 80 | bool pwrreg_nopower; |
4956e109 RV |
81 | }; |
82 | ||
83 | static struct variant_data variant_arm = { | |
8301bb68 RV |
84 | .fifosize = 16 * 4, |
85 | .fifohalfsize = 8 * 4, | |
08458ef6 | 86 | .datalength_bits = 16, |
7d72a1d4 | 87 | .pwrreg_powerup = MCI_PWR_UP, |
4956e109 RV |
88 | }; |
89 | ||
768fbc18 PM |
90 | static struct variant_data variant_arm_extended_fifo = { |
91 | .fifosize = 128 * 4, | |
92 | .fifohalfsize = 64 * 4, | |
93 | .datalength_bits = 16, | |
7d72a1d4 | 94 | .pwrreg_powerup = MCI_PWR_UP, |
768fbc18 PM |
95 | }; |
96 | ||
3a37298a PM |
97 | static struct variant_data variant_arm_extended_fifo_hwfc = { |
98 | .fifosize = 128 * 4, | |
99 | .fifohalfsize = 64 * 4, | |
100 | .clkreg_enable = MCI_ARM_HWFCEN, | |
101 | .datalength_bits = 16, | |
102 | .pwrreg_powerup = MCI_PWR_UP, | |
103 | }; | |
104 | ||
4956e109 | 105 | static struct variant_data variant_u300 = { |
8301bb68 RV |
106 | .fifosize = 16 * 4, |
107 | .fifohalfsize = 8 * 4, | |
49ac215e | 108 | .clkreg_enable = MCI_ST_U300_HWFCEN, |
08458ef6 | 109 | .datalength_bits = 16, |
34177802 | 110 | .sdio = true, |
7d72a1d4 | 111 | .pwrreg_powerup = MCI_PWR_ON, |
4d1a3a0d | 112 | .signal_direction = true, |
f4670dae | 113 | .pwrreg_clkgate = true, |
1ff44433 | 114 | .pwrreg_nopower = true, |
4956e109 RV |
115 | }; |
116 | ||
34fd4213 LW |
117 | static struct variant_data variant_nomadik = { |
118 | .fifosize = 16 * 4, | |
119 | .fifohalfsize = 8 * 4, | |
120 | .clkreg = MCI_CLK_ENABLE, | |
121 | .datalength_bits = 24, | |
122 | .sdio = true, | |
123 | .st_clkdiv = true, | |
124 | .pwrreg_powerup = MCI_PWR_ON, | |
125 | .signal_direction = true, | |
f4670dae | 126 | .pwrreg_clkgate = true, |
1ff44433 | 127 | .pwrreg_nopower = true, |
34fd4213 LW |
128 | }; |
129 | ||
4956e109 | 130 | static struct variant_data variant_ux500 = { |
8301bb68 RV |
131 | .fifosize = 30 * 4, |
132 | .fifohalfsize = 8 * 4, | |
4956e109 | 133 | .clkreg = MCI_CLK_ENABLE, |
49ac215e | 134 | .clkreg_enable = MCI_ST_UX500_HWFCEN, |
08458ef6 | 135 | .datalength_bits = 24, |
34177802 | 136 | .sdio = true, |
b70a67f9 | 137 | .st_clkdiv = true, |
7d72a1d4 | 138 | .pwrreg_powerup = MCI_PWR_ON, |
4d1a3a0d | 139 | .signal_direction = true, |
f4670dae | 140 | .pwrreg_clkgate = true, |
01259620 | 141 | .busy_detect = true, |
1ff44433 | 142 | .pwrreg_nopower = true, |
4956e109 | 143 | }; |
b70a67f9 | 144 | |
1784b157 PL |
145 | static struct variant_data variant_ux500v2 = { |
146 | .fifosize = 30 * 4, | |
147 | .fifohalfsize = 8 * 4, | |
148 | .clkreg = MCI_CLK_ENABLE, | |
149 | .clkreg_enable = MCI_ST_UX500_HWFCEN, | |
150 | .datalength_bits = 24, | |
151 | .sdio = true, | |
152 | .st_clkdiv = true, | |
153 | .blksz_datactrl16 = true, | |
7d72a1d4 | 154 | .pwrreg_powerup = MCI_PWR_ON, |
4d1a3a0d | 155 | .signal_direction = true, |
f4670dae | 156 | .pwrreg_clkgate = true, |
01259620 | 157 | .busy_detect = true, |
1ff44433 | 158 | .pwrreg_nopower = true, |
1784b157 PL |
159 | }; |
160 | ||
01259620 UH |
161 | static int mmci_card_busy(struct mmc_host *mmc) |
162 | { | |
163 | struct mmci_host *host = mmc_priv(mmc); | |
164 | unsigned long flags; | |
165 | int busy = 0; | |
166 | ||
167 | pm_runtime_get_sync(mmc_dev(mmc)); | |
168 | ||
169 | spin_lock_irqsave(&host->lock, flags); | |
170 | if (readl(host->base + MMCISTATUS) & MCI_ST_CARDBUSY) | |
171 | busy = 1; | |
172 | spin_unlock_irqrestore(&host->lock, flags); | |
173 | ||
174 | pm_runtime_mark_last_busy(mmc_dev(mmc)); | |
175 | pm_runtime_put_autosuspend(mmc_dev(mmc)); | |
176 | ||
177 | return busy; | |
178 | } | |
179 | ||
653a761e UH |
180 | /* |
181 | * Validate mmc prerequisites | |
182 | */ | |
183 | static int mmci_validate_data(struct mmci_host *host, | |
184 | struct mmc_data *data) | |
185 | { | |
186 | if (!data) | |
187 | return 0; | |
188 | ||
189 | if (!is_power_of_2(data->blksz)) { | |
190 | dev_err(mmc_dev(host->mmc), | |
191 | "unsupported block size (%d bytes)\n", data->blksz); | |
192 | return -EINVAL; | |
193 | } | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
f829c042 UH |
198 | static void mmci_reg_delay(struct mmci_host *host) |
199 | { | |
200 | /* | |
201 | * According to the spec, at least three feedback clock cycles | |
202 | * of max 52 MHz must pass between two writes to the MMCICLOCK reg. | |
203 | * Three MCLK clock cycles must pass between two MMCIPOWER reg writes. | |
204 | * Worst delay time during card init is at 100 kHz => 30 us. | |
205 | * Worst delay time when up and running is at 25 MHz => 120 ns. | |
206 | */ | |
207 | if (host->cclk < 25000000) | |
208 | udelay(30); | |
209 | else | |
210 | ndelay(120); | |
211 | } | |
212 | ||
7437cfa5 UH |
213 | /* |
214 | * This must be called with host->lock held | |
215 | */ | |
216 | static void mmci_write_clkreg(struct mmci_host *host, u32 clk) | |
217 | { | |
218 | if (host->clk_reg != clk) { | |
219 | host->clk_reg = clk; | |
220 | writel(clk, host->base + MMCICLOCK); | |
221 | } | |
222 | } | |
223 | ||
224 | /* | |
225 | * This must be called with host->lock held | |
226 | */ | |
227 | static void mmci_write_pwrreg(struct mmci_host *host, u32 pwr) | |
228 | { | |
229 | if (host->pwr_reg != pwr) { | |
230 | host->pwr_reg = pwr; | |
231 | writel(pwr, host->base + MMCIPOWER); | |
232 | } | |
233 | } | |
234 | ||
9cc639a2 UH |
235 | /* |
236 | * This must be called with host->lock held | |
237 | */ | |
238 | static void mmci_write_datactrlreg(struct mmci_host *host, u32 datactrl) | |
239 | { | |
01259620 UH |
240 | /* Keep ST Micro busy mode if enabled */ |
241 | datactrl |= host->datactrl_reg & MCI_ST_DPSM_BUSYMODE; | |
242 | ||
9cc639a2 UH |
243 | if (host->datactrl_reg != datactrl) { |
244 | host->datactrl_reg = datactrl; | |
245 | writel(datactrl, host->base + MMCIDATACTRL); | |
246 | } | |
247 | } | |
248 | ||
a6a6464a LW |
249 | /* |
250 | * This must be called with host->lock held | |
251 | */ | |
252 | static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired) | |
253 | { | |
4956e109 RV |
254 | struct variant_data *variant = host->variant; |
255 | u32 clk = variant->clkreg; | |
a6a6464a | 256 | |
c58a8509 UH |
257 | /* Make sure cclk reflects the current calculated clock */ |
258 | host->cclk = 0; | |
259 | ||
a6a6464a LW |
260 | if (desired) { |
261 | if (desired >= host->mclk) { | |
991a86e1 | 262 | clk = MCI_CLK_BYPASS; |
399bc486 LW |
263 | if (variant->st_clkdiv) |
264 | clk |= MCI_ST_UX500_NEG_EDGE; | |
a6a6464a | 265 | host->cclk = host->mclk; |
b70a67f9 LW |
266 | } else if (variant->st_clkdiv) { |
267 | /* | |
268 | * DB8500 TRM says f = mclk / (clkdiv + 2) | |
269 | * => clkdiv = (mclk / f) - 2 | |
270 | * Round the divider up so we don't exceed the max | |
271 | * frequency | |
272 | */ | |
273 | clk = DIV_ROUND_UP(host->mclk, desired) - 2; | |
274 | if (clk >= 256) | |
275 | clk = 255; | |
276 | host->cclk = host->mclk / (clk + 2); | |
a6a6464a | 277 | } else { |
b70a67f9 LW |
278 | /* |
279 | * PL180 TRM says f = mclk / (2 * (clkdiv + 1)) | |
280 | * => clkdiv = mclk / (2 * f) - 1 | |
281 | */ | |
a6a6464a LW |
282 | clk = host->mclk / (2 * desired) - 1; |
283 | if (clk >= 256) | |
284 | clk = 255; | |
285 | host->cclk = host->mclk / (2 * (clk + 1)); | |
286 | } | |
4380c14f RV |
287 | |
288 | clk |= variant->clkreg_enable; | |
a6a6464a LW |
289 | clk |= MCI_CLK_ENABLE; |
290 | /* This hasn't proven to be worthwhile */ | |
291 | /* clk |= MCI_CLK_PWRSAVE; */ | |
292 | } | |
293 | ||
c58a8509 UH |
294 | /* Set actual clock for debug */ |
295 | host->mmc->actual_clock = host->cclk; | |
296 | ||
9e6c82cd | 297 | if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) |
771dc157 LW |
298 | clk |= MCI_4BIT_BUS; |
299 | if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_8) | |
300 | clk |= MCI_ST_8BIT_BUS; | |
9e6c82cd | 301 | |
6dbb6ee0 UH |
302 | if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50) |
303 | clk |= MCI_ST_UX500_NEG_EDGE; | |
304 | ||
7437cfa5 | 305 | mmci_write_clkreg(host, clk); |
a6a6464a LW |
306 | } |
307 | ||
1da177e4 LT |
308 | static void |
309 | mmci_request_end(struct mmci_host *host, struct mmc_request *mrq) | |
310 | { | |
311 | writel(0, host->base + MMCICOMMAND); | |
312 | ||
e47c222b RK |
313 | BUG_ON(host->data); |
314 | ||
1da177e4 LT |
315 | host->mrq = NULL; |
316 | host->cmd = NULL; | |
317 | ||
1da177e4 | 318 | mmc_request_done(host->mmc, mrq); |
2cd976c4 UH |
319 | |
320 | pm_runtime_mark_last_busy(mmc_dev(host->mmc)); | |
321 | pm_runtime_put_autosuspend(mmc_dev(host->mmc)); | |
1da177e4 LT |
322 | } |
323 | ||
2686b4b4 LW |
324 | static void mmci_set_mask1(struct mmci_host *host, unsigned int mask) |
325 | { | |
326 | void __iomem *base = host->base; | |
327 | ||
328 | if (host->singleirq) { | |
329 | unsigned int mask0 = readl(base + MMCIMASK0); | |
330 | ||
331 | mask0 &= ~MCI_IRQ1MASK; | |
332 | mask0 |= mask; | |
333 | ||
334 | writel(mask0, base + MMCIMASK0); | |
335 | } | |
336 | ||
337 | writel(mask, base + MMCIMASK1); | |
338 | } | |
339 | ||
1da177e4 LT |
340 | static void mmci_stop_data(struct mmci_host *host) |
341 | { | |
9cc639a2 | 342 | mmci_write_datactrlreg(host, 0); |
2686b4b4 | 343 | mmci_set_mask1(host, 0); |
1da177e4 LT |
344 | host->data = NULL; |
345 | } | |
346 | ||
4ce1d6cb RV |
347 | static void mmci_init_sg(struct mmci_host *host, struct mmc_data *data) |
348 | { | |
349 | unsigned int flags = SG_MITER_ATOMIC; | |
350 | ||
351 | if (data->flags & MMC_DATA_READ) | |
352 | flags |= SG_MITER_TO_SG; | |
353 | else | |
354 | flags |= SG_MITER_FROM_SG; | |
355 | ||
356 | sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); | |
357 | } | |
358 | ||
c8ebae37 RK |
359 | /* |
360 | * All the DMA operation mode stuff goes inside this ifdef. | |
361 | * This assumes that you have a generic DMA device interface, | |
362 | * no custom DMA interfaces are supported. | |
363 | */ | |
364 | #ifdef CONFIG_DMA_ENGINE | |
c3be1efd | 365 | static void mmci_dma_setup(struct mmci_host *host) |
c8ebae37 RK |
366 | { |
367 | struct mmci_platform_data *plat = host->plat; | |
368 | const char *rxname, *txname; | |
369 | dma_cap_mask_t mask; | |
370 | ||
1fd83f0e LJ |
371 | host->dma_rx_channel = dma_request_slave_channel(mmc_dev(host->mmc), "rx"); |
372 | host->dma_tx_channel = dma_request_slave_channel(mmc_dev(host->mmc), "tx"); | |
c8ebae37 | 373 | |
58c7ccbf PF |
374 | /* initialize pre request cookie */ |
375 | host->next_data.cookie = 1; | |
376 | ||
c8ebae37 RK |
377 | /* Try to acquire a generic DMA engine slave channel */ |
378 | dma_cap_zero(mask); | |
379 | dma_cap_set(DMA_SLAVE, mask); | |
380 | ||
1fd83f0e LJ |
381 | if (plat && plat->dma_filter) { |
382 | if (!host->dma_rx_channel && plat->dma_rx_param) { | |
383 | host->dma_rx_channel = dma_request_channel(mask, | |
c8ebae37 RK |
384 | plat->dma_filter, |
385 | plat->dma_rx_param); | |
1fd83f0e LJ |
386 | /* E.g if no DMA hardware is present */ |
387 | if (!host->dma_rx_channel) | |
388 | dev_err(mmc_dev(host->mmc), "no RX DMA channel\n"); | |
389 | } | |
c8ebae37 | 390 | |
1fd83f0e LJ |
391 | if (!host->dma_tx_channel && plat->dma_tx_param) { |
392 | host->dma_tx_channel = dma_request_channel(mask, | |
c8ebae37 RK |
393 | plat->dma_filter, |
394 | plat->dma_tx_param); | |
1fd83f0e LJ |
395 | if (!host->dma_tx_channel) |
396 | dev_warn(mmc_dev(host->mmc), "no TX DMA channel\n"); | |
397 | } | |
c8ebae37 RK |
398 | } |
399 | ||
1fd83f0e LJ |
400 | /* |
401 | * If only an RX channel is specified, the driver will | |
402 | * attempt to use it bidirectionally, however if it is | |
403 | * is specified but cannot be located, DMA will be disabled. | |
404 | */ | |
405 | if (host->dma_rx_channel && !host->dma_tx_channel) | |
406 | host->dma_tx_channel = host->dma_rx_channel; | |
407 | ||
c8ebae37 RK |
408 | if (host->dma_rx_channel) |
409 | rxname = dma_chan_name(host->dma_rx_channel); | |
410 | else | |
411 | rxname = "none"; | |
412 | ||
413 | if (host->dma_tx_channel) | |
414 | txname = dma_chan_name(host->dma_tx_channel); | |
415 | else | |
416 | txname = "none"; | |
417 | ||
418 | dev_info(mmc_dev(host->mmc), "DMA channels RX %s, TX %s\n", | |
419 | rxname, txname); | |
420 | ||
421 | /* | |
422 | * Limit the maximum segment size in any SG entry according to | |
423 | * the parameters of the DMA engine device. | |
424 | */ | |
425 | if (host->dma_tx_channel) { | |
426 | struct device *dev = host->dma_tx_channel->device->dev; | |
427 | unsigned int max_seg_size = dma_get_max_seg_size(dev); | |
428 | ||
429 | if (max_seg_size < host->mmc->max_seg_size) | |
430 | host->mmc->max_seg_size = max_seg_size; | |
431 | } | |
432 | if (host->dma_rx_channel) { | |
433 | struct device *dev = host->dma_rx_channel->device->dev; | |
434 | unsigned int max_seg_size = dma_get_max_seg_size(dev); | |
435 | ||
436 | if (max_seg_size < host->mmc->max_seg_size) | |
437 | host->mmc->max_seg_size = max_seg_size; | |
438 | } | |
439 | } | |
440 | ||
441 | /* | |
6e0ee714 | 442 | * This is used in or so inline it |
c8ebae37 RK |
443 | * so it can be discarded. |
444 | */ | |
445 | static inline void mmci_dma_release(struct mmci_host *host) | |
446 | { | |
447 | struct mmci_platform_data *plat = host->plat; | |
448 | ||
449 | if (host->dma_rx_channel) | |
450 | dma_release_channel(host->dma_rx_channel); | |
451 | if (host->dma_tx_channel && plat->dma_tx_param) | |
452 | dma_release_channel(host->dma_tx_channel); | |
453 | host->dma_rx_channel = host->dma_tx_channel = NULL; | |
454 | } | |
455 | ||
653a761e UH |
456 | static void mmci_dma_data_error(struct mmci_host *host) |
457 | { | |
458 | dev_err(mmc_dev(host->mmc), "error during DMA transfer!\n"); | |
459 | dmaengine_terminate_all(host->dma_current); | |
460 | host->dma_current = NULL; | |
461 | host->dma_desc_current = NULL; | |
462 | host->data->host_cookie = 0; | |
463 | } | |
464 | ||
c8ebae37 RK |
465 | static void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data) |
466 | { | |
653a761e | 467 | struct dma_chan *chan; |
c8ebae37 | 468 | enum dma_data_direction dir; |
653a761e UH |
469 | |
470 | if (data->flags & MMC_DATA_READ) { | |
471 | dir = DMA_FROM_DEVICE; | |
472 | chan = host->dma_rx_channel; | |
473 | } else { | |
474 | dir = DMA_TO_DEVICE; | |
475 | chan = host->dma_tx_channel; | |
476 | } | |
477 | ||
478 | dma_unmap_sg(chan->device->dev, data->sg, data->sg_len, dir); | |
479 | } | |
480 | ||
481 | static void mmci_dma_finalize(struct mmci_host *host, struct mmc_data *data) | |
482 | { | |
c8ebae37 RK |
483 | u32 status; |
484 | int i; | |
485 | ||
486 | /* Wait up to 1ms for the DMA to complete */ | |
487 | for (i = 0; ; i++) { | |
488 | status = readl(host->base + MMCISTATUS); | |
489 | if (!(status & MCI_RXDATAAVLBLMASK) || i >= 100) | |
490 | break; | |
491 | udelay(10); | |
492 | } | |
493 | ||
494 | /* | |
495 | * Check to see whether we still have some data left in the FIFO - | |
496 | * this catches DMA controllers which are unable to monitor the | |
497 | * DMALBREQ and DMALSREQ signals while allowing us to DMA to non- | |
498 | * contiguous buffers. On TX, we'll get a FIFO underrun error. | |
499 | */ | |
500 | if (status & MCI_RXDATAAVLBLMASK) { | |
653a761e | 501 | mmci_dma_data_error(host); |
c8ebae37 RK |
502 | if (!data->error) |
503 | data->error = -EIO; | |
504 | } | |
505 | ||
58c7ccbf | 506 | if (!data->host_cookie) |
653a761e | 507 | mmci_dma_unmap(host, data); |
c8ebae37 RK |
508 | |
509 | /* | |
510 | * Use of DMA with scatter-gather is impossible. | |
511 | * Give up with DMA and switch back to PIO mode. | |
512 | */ | |
513 | if (status & MCI_RXDATAAVLBLMASK) { | |
514 | dev_err(mmc_dev(host->mmc), "buggy DMA detected. Taking evasive action.\n"); | |
515 | mmci_dma_release(host); | |
516 | } | |
c8ebae37 | 517 | |
653a761e UH |
518 | host->dma_current = NULL; |
519 | host->dma_desc_current = NULL; | |
c8ebae37 RK |
520 | } |
521 | ||
653a761e UH |
522 | /* prepares DMA channel and DMA descriptor, returns non-zero on failure */ |
523 | static int __mmci_dma_prep_data(struct mmci_host *host, struct mmc_data *data, | |
524 | struct dma_chan **dma_chan, | |
525 | struct dma_async_tx_descriptor **dma_desc) | |
c8ebae37 RK |
526 | { |
527 | struct variant_data *variant = host->variant; | |
528 | struct dma_slave_config conf = { | |
529 | .src_addr = host->phybase + MMCIFIFO, | |
530 | .dst_addr = host->phybase + MMCIFIFO, | |
531 | .src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, | |
532 | .dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, | |
533 | .src_maxburst = variant->fifohalfsize >> 2, /* # of words */ | |
534 | .dst_maxburst = variant->fifohalfsize >> 2, /* # of words */ | |
258aea76 | 535 | .device_fc = false, |
c8ebae37 | 536 | }; |
c8ebae37 RK |
537 | struct dma_chan *chan; |
538 | struct dma_device *device; | |
539 | struct dma_async_tx_descriptor *desc; | |
05f5799c | 540 | enum dma_data_direction buffer_dirn; |
c8ebae37 RK |
541 | int nr_sg; |
542 | ||
c8ebae37 | 543 | if (data->flags & MMC_DATA_READ) { |
05f5799c VK |
544 | conf.direction = DMA_DEV_TO_MEM; |
545 | buffer_dirn = DMA_FROM_DEVICE; | |
c8ebae37 RK |
546 | chan = host->dma_rx_channel; |
547 | } else { | |
05f5799c VK |
548 | conf.direction = DMA_MEM_TO_DEV; |
549 | buffer_dirn = DMA_TO_DEVICE; | |
c8ebae37 RK |
550 | chan = host->dma_tx_channel; |
551 | } | |
552 | ||
553 | /* If there's no DMA channel, fall back to PIO */ | |
554 | if (!chan) | |
555 | return -EINVAL; | |
556 | ||
557 | /* If less than or equal to the fifo size, don't bother with DMA */ | |
58c7ccbf | 558 | if (data->blksz * data->blocks <= variant->fifosize) |
c8ebae37 RK |
559 | return -EINVAL; |
560 | ||
561 | device = chan->device; | |
05f5799c | 562 | nr_sg = dma_map_sg(device->dev, data->sg, data->sg_len, buffer_dirn); |
c8ebae37 RK |
563 | if (nr_sg == 0) |
564 | return -EINVAL; | |
565 | ||
566 | dmaengine_slave_config(chan, &conf); | |
16052827 | 567 | desc = dmaengine_prep_slave_sg(chan, data->sg, nr_sg, |
c8ebae37 RK |
568 | conf.direction, DMA_CTRL_ACK); |
569 | if (!desc) | |
570 | goto unmap_exit; | |
571 | ||
653a761e UH |
572 | *dma_chan = chan; |
573 | *dma_desc = desc; | |
58c7ccbf PF |
574 | |
575 | return 0; | |
c8ebae37 | 576 | |
58c7ccbf | 577 | unmap_exit: |
05f5799c | 578 | dma_unmap_sg(device->dev, data->sg, data->sg_len, buffer_dirn); |
58c7ccbf PF |
579 | return -ENOMEM; |
580 | } | |
581 | ||
653a761e UH |
582 | static inline int mmci_dma_prep_data(struct mmci_host *host, |
583 | struct mmc_data *data) | |
584 | { | |
585 | /* Check if next job is already prepared. */ | |
586 | if (host->dma_current && host->dma_desc_current) | |
587 | return 0; | |
588 | ||
589 | /* No job were prepared thus do it now. */ | |
590 | return __mmci_dma_prep_data(host, data, &host->dma_current, | |
591 | &host->dma_desc_current); | |
592 | } | |
593 | ||
594 | static inline int mmci_dma_prep_next(struct mmci_host *host, | |
595 | struct mmc_data *data) | |
596 | { | |
597 | struct mmci_host_next *nd = &host->next_data; | |
598 | return __mmci_dma_prep_data(host, data, &nd->dma_chan, &nd->dma_desc); | |
599 | } | |
600 | ||
58c7ccbf PF |
601 | static int mmci_dma_start_data(struct mmci_host *host, unsigned int datactrl) |
602 | { | |
603 | int ret; | |
604 | struct mmc_data *data = host->data; | |
605 | ||
653a761e | 606 | ret = mmci_dma_prep_data(host, host->data); |
58c7ccbf PF |
607 | if (ret) |
608 | return ret; | |
609 | ||
610 | /* Okay, go for it. */ | |
c8ebae37 RK |
611 | dev_vdbg(mmc_dev(host->mmc), |
612 | "Submit MMCI DMA job, sglen %d blksz %04x blks %04x flags %08x\n", | |
613 | data->sg_len, data->blksz, data->blocks, data->flags); | |
58c7ccbf PF |
614 | dmaengine_submit(host->dma_desc_current); |
615 | dma_async_issue_pending(host->dma_current); | |
c8ebae37 RK |
616 | |
617 | datactrl |= MCI_DPSM_DMAENABLE; | |
618 | ||
619 | /* Trigger the DMA transfer */ | |
9cc639a2 | 620 | mmci_write_datactrlreg(host, datactrl); |
c8ebae37 RK |
621 | |
622 | /* | |
623 | * Let the MMCI say when the data is ended and it's time | |
624 | * to fire next DMA request. When that happens, MMCI will | |
625 | * call mmci_data_end() | |
626 | */ | |
627 | writel(readl(host->base + MMCIMASK0) | MCI_DATAENDMASK, | |
628 | host->base + MMCIMASK0); | |
629 | return 0; | |
58c7ccbf | 630 | } |
c8ebae37 | 631 | |
58c7ccbf PF |
632 | static void mmci_get_next_data(struct mmci_host *host, struct mmc_data *data) |
633 | { | |
634 | struct mmci_host_next *next = &host->next_data; | |
635 | ||
653a761e UH |
636 | WARN_ON(data->host_cookie && data->host_cookie != next->cookie); |
637 | WARN_ON(!data->host_cookie && (next->dma_desc || next->dma_chan)); | |
58c7ccbf PF |
638 | |
639 | host->dma_desc_current = next->dma_desc; | |
640 | host->dma_current = next->dma_chan; | |
58c7ccbf PF |
641 | next->dma_desc = NULL; |
642 | next->dma_chan = NULL; | |
c8ebae37 | 643 | } |
58c7ccbf PF |
644 | |
645 | static void mmci_pre_request(struct mmc_host *mmc, struct mmc_request *mrq, | |
646 | bool is_first_req) | |
647 | { | |
648 | struct mmci_host *host = mmc_priv(mmc); | |
649 | struct mmc_data *data = mrq->data; | |
650 | struct mmci_host_next *nd = &host->next_data; | |
651 | ||
652 | if (!data) | |
653 | return; | |
654 | ||
653a761e UH |
655 | BUG_ON(data->host_cookie); |
656 | ||
657 | if (mmci_validate_data(host, data)) | |
58c7ccbf | 658 | return; |
58c7ccbf | 659 | |
653a761e UH |
660 | if (!mmci_dma_prep_next(host, data)) |
661 | data->host_cookie = ++nd->cookie < 0 ? 1 : nd->cookie; | |
58c7ccbf PF |
662 | } |
663 | ||
664 | static void mmci_post_request(struct mmc_host *mmc, struct mmc_request *mrq, | |
665 | int err) | |
666 | { | |
667 | struct mmci_host *host = mmc_priv(mmc); | |
668 | struct mmc_data *data = mrq->data; | |
58c7ccbf | 669 | |
653a761e | 670 | if (!data || !data->host_cookie) |
58c7ccbf PF |
671 | return; |
672 | ||
653a761e | 673 | mmci_dma_unmap(host, data); |
58c7ccbf | 674 | |
653a761e UH |
675 | if (err) { |
676 | struct mmci_host_next *next = &host->next_data; | |
677 | struct dma_chan *chan; | |
678 | if (data->flags & MMC_DATA_READ) | |
679 | chan = host->dma_rx_channel; | |
680 | else | |
681 | chan = host->dma_tx_channel; | |
682 | dmaengine_terminate_all(chan); | |
58c7ccbf | 683 | |
653a761e UH |
684 | next->dma_desc = NULL; |
685 | next->dma_chan = NULL; | |
58c7ccbf PF |
686 | } |
687 | } | |
688 | ||
c8ebae37 RK |
689 | #else |
690 | /* Blank functions if the DMA engine is not available */ | |
58c7ccbf PF |
691 | static void mmci_get_next_data(struct mmci_host *host, struct mmc_data *data) |
692 | { | |
693 | } | |
c8ebae37 RK |
694 | static inline void mmci_dma_setup(struct mmci_host *host) |
695 | { | |
696 | } | |
697 | ||
698 | static inline void mmci_dma_release(struct mmci_host *host) | |
699 | { | |
700 | } | |
701 | ||
702 | static inline void mmci_dma_unmap(struct mmci_host *host, struct mmc_data *data) | |
703 | { | |
704 | } | |
705 | ||
653a761e UH |
706 | static inline void mmci_dma_finalize(struct mmci_host *host, |
707 | struct mmc_data *data) | |
708 | { | |
709 | } | |
710 | ||
c8ebae37 RK |
711 | static inline void mmci_dma_data_error(struct mmci_host *host) |
712 | { | |
713 | } | |
714 | ||
715 | static inline int mmci_dma_start_data(struct mmci_host *host, unsigned int datactrl) | |
716 | { | |
717 | return -ENOSYS; | |
718 | } | |
58c7ccbf PF |
719 | |
720 | #define mmci_pre_request NULL | |
721 | #define mmci_post_request NULL | |
722 | ||
c8ebae37 RK |
723 | #endif |
724 | ||
1da177e4 LT |
725 | static void mmci_start_data(struct mmci_host *host, struct mmc_data *data) |
726 | { | |
8301bb68 | 727 | struct variant_data *variant = host->variant; |
1da177e4 | 728 | unsigned int datactrl, timeout, irqmask; |
7b09cdac | 729 | unsigned long long clks; |
1da177e4 | 730 | void __iomem *base; |
3bc87f24 | 731 | int blksz_bits; |
1da177e4 | 732 | |
64de0289 LW |
733 | dev_dbg(mmc_dev(host->mmc), "blksz %04x blks %04x flags %08x\n", |
734 | data->blksz, data->blocks, data->flags); | |
1da177e4 LT |
735 | |
736 | host->data = data; | |
528320db | 737 | host->size = data->blksz * data->blocks; |
51d4375d | 738 | data->bytes_xfered = 0; |
1da177e4 | 739 | |
7b09cdac RK |
740 | clks = (unsigned long long)data->timeout_ns * host->cclk; |
741 | do_div(clks, 1000000000UL); | |
742 | ||
743 | timeout = data->timeout_clks + (unsigned int)clks; | |
1da177e4 LT |
744 | |
745 | base = host->base; | |
746 | writel(timeout, base + MMCIDATATIMER); | |
747 | writel(host->size, base + MMCIDATALENGTH); | |
748 | ||
3bc87f24 RK |
749 | blksz_bits = ffs(data->blksz) - 1; |
750 | BUG_ON(1 << blksz_bits != data->blksz); | |
751 | ||
1784b157 PL |
752 | if (variant->blksz_datactrl16) |
753 | datactrl = MCI_DPSM_ENABLE | (data->blksz << 16); | |
754 | else | |
755 | datactrl = MCI_DPSM_ENABLE | blksz_bits << 4; | |
c8ebae37 RK |
756 | |
757 | if (data->flags & MMC_DATA_READ) | |
1da177e4 | 758 | datactrl |= MCI_DPSM_DIRECTION; |
c8ebae37 | 759 | |
7258db7e UH |
760 | /* The ST Micro variants has a special bit to enable SDIO */ |
761 | if (variant->sdio && host->mmc->card) | |
06c1a121 UH |
762 | if (mmc_card_sdio(host->mmc->card)) { |
763 | /* | |
764 | * The ST Micro variants has a special bit | |
765 | * to enable SDIO. | |
766 | */ | |
767 | u32 clk; | |
768 | ||
7258db7e UH |
769 | datactrl |= MCI_ST_DPSM_SDIOEN; |
770 | ||
06c1a121 | 771 | /* |
70ac0935 UH |
772 | * The ST Micro variant for SDIO small write transfers |
773 | * needs to have clock H/W flow control disabled, | |
774 | * otherwise the transfer will not start. The threshold | |
775 | * depends on the rate of MCLK. | |
06c1a121 | 776 | */ |
70ac0935 UH |
777 | if (data->flags & MMC_DATA_WRITE && |
778 | (host->size < 8 || | |
779 | (host->size <= 8 && host->mclk > 50000000))) | |
06c1a121 UH |
780 | clk = host->clk_reg & ~variant->clkreg_enable; |
781 | else | |
782 | clk = host->clk_reg | variant->clkreg_enable; | |
783 | ||
784 | mmci_write_clkreg(host, clk); | |
785 | } | |
786 | ||
6dbb6ee0 UH |
787 | if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50) |
788 | datactrl |= MCI_ST_DPSM_DDRMODE; | |
789 | ||
c8ebae37 RK |
790 | /* |
791 | * Attempt to use DMA operation mode, if this | |
792 | * should fail, fall back to PIO mode | |
793 | */ | |
794 | if (!mmci_dma_start_data(host, datactrl)) | |
795 | return; | |
796 | ||
797 | /* IRQ mode, map the SG list for CPU reading/writing */ | |
798 | mmci_init_sg(host, data); | |
799 | ||
800 | if (data->flags & MMC_DATA_READ) { | |
1da177e4 | 801 | irqmask = MCI_RXFIFOHALFFULLMASK; |
0425a142 RK |
802 | |
803 | /* | |
c4d877c1 RK |
804 | * If we have less than the fifo 'half-full' threshold to |
805 | * transfer, trigger a PIO interrupt as soon as any data | |
806 | * is available. | |
0425a142 | 807 | */ |
c4d877c1 | 808 | if (host->size < variant->fifohalfsize) |
0425a142 | 809 | irqmask |= MCI_RXDATAAVLBLMASK; |
1da177e4 LT |
810 | } else { |
811 | /* | |
812 | * We don't actually need to include "FIFO empty" here | |
813 | * since its implicit in "FIFO half empty". | |
814 | */ | |
815 | irqmask = MCI_TXFIFOHALFEMPTYMASK; | |
816 | } | |
817 | ||
9cc639a2 | 818 | mmci_write_datactrlreg(host, datactrl); |
1da177e4 | 819 | writel(readl(base + MMCIMASK0) & ~MCI_DATAENDMASK, base + MMCIMASK0); |
2686b4b4 | 820 | mmci_set_mask1(host, irqmask); |
1da177e4 LT |
821 | } |
822 | ||
823 | static void | |
824 | mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c) | |
825 | { | |
826 | void __iomem *base = host->base; | |
827 | ||
64de0289 | 828 | dev_dbg(mmc_dev(host->mmc), "op %02x arg %08x flags %08x\n", |
1da177e4 LT |
829 | cmd->opcode, cmd->arg, cmd->flags); |
830 | ||
831 | if (readl(base + MMCICOMMAND) & MCI_CPSM_ENABLE) { | |
832 | writel(0, base + MMCICOMMAND); | |
833 | udelay(1); | |
834 | } | |
835 | ||
836 | c |= cmd->opcode | MCI_CPSM_ENABLE; | |
e9225176 RK |
837 | if (cmd->flags & MMC_RSP_PRESENT) { |
838 | if (cmd->flags & MMC_RSP_136) | |
839 | c |= MCI_CPSM_LONGRSP; | |
1da177e4 | 840 | c |= MCI_CPSM_RESPONSE; |
1da177e4 LT |
841 | } |
842 | if (/*interrupt*/0) | |
843 | c |= MCI_CPSM_INTERRUPT; | |
844 | ||
845 | host->cmd = cmd; | |
846 | ||
847 | writel(cmd->arg, base + MMCIARGUMENT); | |
848 | writel(c, base + MMCICOMMAND); | |
849 | } | |
850 | ||
851 | static void | |
852 | mmci_data_irq(struct mmci_host *host, struct mmc_data *data, | |
853 | unsigned int status) | |
854 | { | |
f20f8f21 | 855 | /* First check for errors */ |
b63038d6 UH |
856 | if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_STARTBITERR| |
857 | MCI_TXUNDERRUN|MCI_RXOVERRUN)) { | |
8cb28155 | 858 | u32 remain, success; |
f20f8f21 | 859 | |
c8ebae37 | 860 | /* Terminate the DMA transfer */ |
653a761e | 861 | if (dma_inprogress(host)) { |
c8ebae37 | 862 | mmci_dma_data_error(host); |
653a761e UH |
863 | mmci_dma_unmap(host, data); |
864 | } | |
e9c091b4 RK |
865 | |
866 | /* | |
c8afc9d5 RK |
867 | * Calculate how far we are into the transfer. Note that |
868 | * the data counter gives the number of bytes transferred | |
869 | * on the MMC bus, not on the host side. On reads, this | |
870 | * can be as much as a FIFO-worth of data ahead. This | |
871 | * matters for FIFO overruns only. | |
e9c091b4 | 872 | */ |
f5a106d9 | 873 | remain = readl(host->base + MMCIDATACNT); |
8cb28155 LW |
874 | success = data->blksz * data->blocks - remain; |
875 | ||
c8afc9d5 RK |
876 | dev_dbg(mmc_dev(host->mmc), "MCI ERROR IRQ, status 0x%08x at 0x%08x\n", |
877 | status, success); | |
8cb28155 LW |
878 | if (status & MCI_DATACRCFAIL) { |
879 | /* Last block was not successful */ | |
c8afc9d5 | 880 | success -= 1; |
17b0429d | 881 | data->error = -EILSEQ; |
8cb28155 | 882 | } else if (status & MCI_DATATIMEOUT) { |
17b0429d | 883 | data->error = -ETIMEDOUT; |
757df746 LW |
884 | } else if (status & MCI_STARTBITERR) { |
885 | data->error = -ECOMM; | |
c8afc9d5 RK |
886 | } else if (status & MCI_TXUNDERRUN) { |
887 | data->error = -EIO; | |
888 | } else if (status & MCI_RXOVERRUN) { | |
889 | if (success > host->variant->fifosize) | |
890 | success -= host->variant->fifosize; | |
891 | else | |
892 | success = 0; | |
17b0429d | 893 | data->error = -EIO; |
4ce1d6cb | 894 | } |
51d4375d | 895 | data->bytes_xfered = round_down(success, data->blksz); |
1da177e4 | 896 | } |
f20f8f21 | 897 | |
8cb28155 LW |
898 | if (status & MCI_DATABLOCKEND) |
899 | dev_err(mmc_dev(host->mmc), "stray MCI_DATABLOCKEND interrupt\n"); | |
f20f8f21 | 900 | |
ccff9b51 | 901 | if (status & MCI_DATAEND || data->error) { |
c8ebae37 | 902 | if (dma_inprogress(host)) |
653a761e | 903 | mmci_dma_finalize(host, data); |
1da177e4 LT |
904 | mmci_stop_data(host); |
905 | ||
8cb28155 LW |
906 | if (!data->error) |
907 | /* The error clause is handled above, success! */ | |
51d4375d | 908 | data->bytes_xfered = data->blksz * data->blocks; |
f20f8f21 | 909 | |
024629c6 | 910 | if (!data->stop || host->mrq->sbc) { |
1da177e4 LT |
911 | mmci_request_end(host, data->mrq); |
912 | } else { | |
913 | mmci_start_command(host, data->stop, 0); | |
914 | } | |
915 | } | |
916 | } | |
917 | ||
918 | static void | |
919 | mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd, | |
920 | unsigned int status) | |
921 | { | |
922 | void __iomem *base = host->base; | |
024629c6 | 923 | bool sbc = (cmd == host->mrq->sbc); |
1da177e4 LT |
924 | |
925 | host->cmd = NULL; | |
926 | ||
1da177e4 | 927 | if (status & MCI_CMDTIMEOUT) { |
17b0429d | 928 | cmd->error = -ETIMEDOUT; |
1da177e4 | 929 | } else if (status & MCI_CMDCRCFAIL && cmd->flags & MMC_RSP_CRC) { |
17b0429d | 930 | cmd->error = -EILSEQ; |
9047b435 RKAL |
931 | } else { |
932 | cmd->resp[0] = readl(base + MMCIRESPONSE0); | |
933 | cmd->resp[1] = readl(base + MMCIRESPONSE1); | |
934 | cmd->resp[2] = readl(base + MMCIRESPONSE2); | |
935 | cmd->resp[3] = readl(base + MMCIRESPONSE3); | |
1da177e4 LT |
936 | } |
937 | ||
024629c6 | 938 | if ((!sbc && !cmd->data) || cmd->error) { |
3b6e3c73 UH |
939 | if (host->data) { |
940 | /* Terminate the DMA transfer */ | |
653a761e | 941 | if (dma_inprogress(host)) { |
3b6e3c73 | 942 | mmci_dma_data_error(host); |
653a761e UH |
943 | mmci_dma_unmap(host, host->data); |
944 | } | |
e47c222b | 945 | mmci_stop_data(host); |
3b6e3c73 | 946 | } |
024629c6 UH |
947 | mmci_request_end(host, host->mrq); |
948 | } else if (sbc) { | |
949 | mmci_start_command(host, host->mrq->cmd, 0); | |
1da177e4 LT |
950 | } else if (!(cmd->data->flags & MMC_DATA_READ)) { |
951 | mmci_start_data(host, cmd->data); | |
952 | } | |
953 | } | |
954 | ||
955 | static int mmci_pio_read(struct mmci_host *host, char *buffer, unsigned int remain) | |
956 | { | |
957 | void __iomem *base = host->base; | |
958 | char *ptr = buffer; | |
959 | u32 status; | |
26eed9a5 | 960 | int host_remain = host->size; |
1da177e4 LT |
961 | |
962 | do { | |
26eed9a5 | 963 | int count = host_remain - (readl(base + MMCIFIFOCNT) << 2); |
1da177e4 LT |
964 | |
965 | if (count > remain) | |
966 | count = remain; | |
967 | ||
968 | if (count <= 0) | |
969 | break; | |
970 | ||
393e5e24 UH |
971 | /* |
972 | * SDIO especially may want to send something that is | |
973 | * not divisible by 4 (as opposed to card sectors | |
974 | * etc). Therefore make sure to always read the last bytes | |
975 | * while only doing full 32-bit reads towards the FIFO. | |
976 | */ | |
977 | if (unlikely(count & 0x3)) { | |
978 | if (count < 4) { | |
979 | unsigned char buf[4]; | |
4b85da08 | 980 | ioread32_rep(base + MMCIFIFO, buf, 1); |
393e5e24 UH |
981 | memcpy(ptr, buf, count); |
982 | } else { | |
4b85da08 | 983 | ioread32_rep(base + MMCIFIFO, ptr, count >> 2); |
393e5e24 UH |
984 | count &= ~0x3; |
985 | } | |
986 | } else { | |
4b85da08 | 987 | ioread32_rep(base + MMCIFIFO, ptr, count >> 2); |
393e5e24 | 988 | } |
1da177e4 LT |
989 | |
990 | ptr += count; | |
991 | remain -= count; | |
26eed9a5 | 992 | host_remain -= count; |
1da177e4 LT |
993 | |
994 | if (remain == 0) | |
995 | break; | |
996 | ||
997 | status = readl(base + MMCISTATUS); | |
998 | } while (status & MCI_RXDATAAVLBL); | |
999 | ||
1000 | return ptr - buffer; | |
1001 | } | |
1002 | ||
1003 | static int mmci_pio_write(struct mmci_host *host, char *buffer, unsigned int remain, u32 status) | |
1004 | { | |
8301bb68 | 1005 | struct variant_data *variant = host->variant; |
1da177e4 LT |
1006 | void __iomem *base = host->base; |
1007 | char *ptr = buffer; | |
1008 | ||
1009 | do { | |
1010 | unsigned int count, maxcnt; | |
1011 | ||
8301bb68 RV |
1012 | maxcnt = status & MCI_TXFIFOEMPTY ? |
1013 | variant->fifosize : variant->fifohalfsize; | |
1da177e4 LT |
1014 | count = min(remain, maxcnt); |
1015 | ||
34177802 LW |
1016 | /* |
1017 | * SDIO especially may want to send something that is | |
1018 | * not divisible by 4 (as opposed to card sectors | |
1019 | * etc), and the FIFO only accept full 32-bit writes. | |
1020 | * So compensate by adding +3 on the count, a single | |
1021 | * byte become a 32bit write, 7 bytes will be two | |
1022 | * 32bit writes etc. | |
1023 | */ | |
4b85da08 | 1024 | iowrite32_rep(base + MMCIFIFO, ptr, (count + 3) >> 2); |
1da177e4 LT |
1025 | |
1026 | ptr += count; | |
1027 | remain -= count; | |
1028 | ||
1029 | if (remain == 0) | |
1030 | break; | |
1031 | ||
1032 | status = readl(base + MMCISTATUS); | |
1033 | } while (status & MCI_TXFIFOHALFEMPTY); | |
1034 | ||
1035 | return ptr - buffer; | |
1036 | } | |
1037 | ||
1038 | /* | |
1039 | * PIO data transfer IRQ handler. | |
1040 | */ | |
7d12e780 | 1041 | static irqreturn_t mmci_pio_irq(int irq, void *dev_id) |
1da177e4 LT |
1042 | { |
1043 | struct mmci_host *host = dev_id; | |
4ce1d6cb | 1044 | struct sg_mapping_iter *sg_miter = &host->sg_miter; |
8301bb68 | 1045 | struct variant_data *variant = host->variant; |
1da177e4 | 1046 | void __iomem *base = host->base; |
4ce1d6cb | 1047 | unsigned long flags; |
1da177e4 LT |
1048 | u32 status; |
1049 | ||
1050 | status = readl(base + MMCISTATUS); | |
1051 | ||
64de0289 | 1052 | dev_dbg(mmc_dev(host->mmc), "irq1 (pio) %08x\n", status); |
1da177e4 | 1053 | |
4ce1d6cb RV |
1054 | local_irq_save(flags); |
1055 | ||
1da177e4 | 1056 | do { |
1da177e4 LT |
1057 | unsigned int remain, len; |
1058 | char *buffer; | |
1059 | ||
1060 | /* | |
1061 | * For write, we only need to test the half-empty flag | |
1062 | * here - if the FIFO is completely empty, then by | |
1063 | * definition it is more than half empty. | |
1064 | * | |
1065 | * For read, check for data available. | |
1066 | */ | |
1067 | if (!(status & (MCI_TXFIFOHALFEMPTY|MCI_RXDATAAVLBL))) | |
1068 | break; | |
1069 | ||
4ce1d6cb RV |
1070 | if (!sg_miter_next(sg_miter)) |
1071 | break; | |
1072 | ||
1073 | buffer = sg_miter->addr; | |
1074 | remain = sg_miter->length; | |
1da177e4 LT |
1075 | |
1076 | len = 0; | |
1077 | if (status & MCI_RXACTIVE) | |
1078 | len = mmci_pio_read(host, buffer, remain); | |
1079 | if (status & MCI_TXACTIVE) | |
1080 | len = mmci_pio_write(host, buffer, remain, status); | |
1081 | ||
4ce1d6cb | 1082 | sg_miter->consumed = len; |
1da177e4 | 1083 | |
1da177e4 LT |
1084 | host->size -= len; |
1085 | remain -= len; | |
1086 | ||
1087 | if (remain) | |
1088 | break; | |
1089 | ||
1da177e4 LT |
1090 | status = readl(base + MMCISTATUS); |
1091 | } while (1); | |
1092 | ||
4ce1d6cb RV |
1093 | sg_miter_stop(sg_miter); |
1094 | ||
1095 | local_irq_restore(flags); | |
1096 | ||
1da177e4 | 1097 | /* |
c4d877c1 RK |
1098 | * If we have less than the fifo 'half-full' threshold to transfer, |
1099 | * trigger a PIO interrupt as soon as any data is available. | |
1da177e4 | 1100 | */ |
c4d877c1 | 1101 | if (status & MCI_RXACTIVE && host->size < variant->fifohalfsize) |
2686b4b4 | 1102 | mmci_set_mask1(host, MCI_RXDATAAVLBLMASK); |
1da177e4 LT |
1103 | |
1104 | /* | |
1105 | * If we run out of data, disable the data IRQs; this | |
1106 | * prevents a race where the FIFO becomes empty before | |
1107 | * the chip itself has disabled the data path, and | |
1108 | * stops us racing with our data end IRQ. | |
1109 | */ | |
1110 | if (host->size == 0) { | |
2686b4b4 | 1111 | mmci_set_mask1(host, 0); |
1da177e4 LT |
1112 | writel(readl(base + MMCIMASK0) | MCI_DATAENDMASK, base + MMCIMASK0); |
1113 | } | |
1114 | ||
1115 | return IRQ_HANDLED; | |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | * Handle completion of command and data transfers. | |
1120 | */ | |
7d12e780 | 1121 | static irqreturn_t mmci_irq(int irq, void *dev_id) |
1da177e4 LT |
1122 | { |
1123 | struct mmci_host *host = dev_id; | |
1124 | u32 status; | |
1125 | int ret = 0; | |
1126 | ||
1127 | spin_lock(&host->lock); | |
1128 | ||
1129 | do { | |
1130 | struct mmc_command *cmd; | |
1131 | struct mmc_data *data; | |
1132 | ||
1133 | status = readl(host->base + MMCISTATUS); | |
2686b4b4 LW |
1134 | |
1135 | if (host->singleirq) { | |
1136 | if (status & readl(host->base + MMCIMASK1)) | |
1137 | mmci_pio_irq(irq, dev_id); | |
1138 | ||
1139 | status &= ~MCI_IRQ1MASK; | |
1140 | } | |
1141 | ||
1da177e4 LT |
1142 | status &= readl(host->base + MMCIMASK0); |
1143 | writel(status, host->base + MMCICLEAR); | |
1144 | ||
64de0289 | 1145 | dev_dbg(mmc_dev(host->mmc), "irq0 (data+cmd) %08x\n", status); |
1da177e4 | 1146 | |
e7f3d222 UH |
1147 | cmd = host->cmd; |
1148 | if (status & (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT|MCI_CMDSENT| | |
1149 | MCI_CMDRESPEND) && cmd) | |
1150 | mmci_cmd_irq(host, cmd, status); | |
1151 | ||
1da177e4 | 1152 | data = host->data; |
b63038d6 UH |
1153 | if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_STARTBITERR| |
1154 | MCI_TXUNDERRUN|MCI_RXOVERRUN|MCI_DATAEND| | |
1155 | MCI_DATABLOCKEND) && data) | |
1da177e4 LT |
1156 | mmci_data_irq(host, data, status); |
1157 | ||
1da177e4 LT |
1158 | ret = 1; |
1159 | } while (status); | |
1160 | ||
1161 | spin_unlock(&host->lock); | |
1162 | ||
1163 | return IRQ_RETVAL(ret); | |
1164 | } | |
1165 | ||
1166 | static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
1167 | { | |
1168 | struct mmci_host *host = mmc_priv(mmc); | |
9e943021 | 1169 | unsigned long flags; |
1da177e4 LT |
1170 | |
1171 | WARN_ON(host->mrq != NULL); | |
1172 | ||
653a761e UH |
1173 | mrq->cmd->error = mmci_validate_data(host, mrq->data); |
1174 | if (mrq->cmd->error) { | |
255d01af PO |
1175 | mmc_request_done(mmc, mrq); |
1176 | return; | |
1177 | } | |
1178 | ||
1c3be369 RK |
1179 | pm_runtime_get_sync(mmc_dev(mmc)); |
1180 | ||
9e943021 | 1181 | spin_lock_irqsave(&host->lock, flags); |
1da177e4 LT |
1182 | |
1183 | host->mrq = mrq; | |
1184 | ||
58c7ccbf PF |
1185 | if (mrq->data) |
1186 | mmci_get_next_data(host, mrq->data); | |
1187 | ||
1da177e4 LT |
1188 | if (mrq->data && mrq->data->flags & MMC_DATA_READ) |
1189 | mmci_start_data(host, mrq->data); | |
1190 | ||
024629c6 UH |
1191 | if (mrq->sbc) |
1192 | mmci_start_command(host, mrq->sbc, 0); | |
1193 | else | |
1194 | mmci_start_command(host, mrq->cmd, 0); | |
1da177e4 | 1195 | |
9e943021 | 1196 | spin_unlock_irqrestore(&host->lock, flags); |
1da177e4 LT |
1197 | } |
1198 | ||
1199 | static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
1200 | { | |
1201 | struct mmci_host *host = mmc_priv(mmc); | |
7d72a1d4 | 1202 | struct variant_data *variant = host->variant; |
a6a6464a LW |
1203 | u32 pwr = 0; |
1204 | unsigned long flags; | |
db90f91f | 1205 | int ret; |
1da177e4 | 1206 | |
2cd976c4 UH |
1207 | pm_runtime_get_sync(mmc_dev(mmc)); |
1208 | ||
bc521818 UH |
1209 | if (host->plat->ios_handler && |
1210 | host->plat->ios_handler(mmc_dev(mmc), ios)) | |
1211 | dev_err(mmc_dev(mmc), "platform ios_handler failed\n"); | |
1212 | ||
1da177e4 LT |
1213 | switch (ios->power_mode) { |
1214 | case MMC_POWER_OFF: | |
599c1d5c UH |
1215 | if (!IS_ERR(mmc->supply.vmmc)) |
1216 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); | |
237fb5e6 | 1217 | |
7c0136ef | 1218 | if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) { |
237fb5e6 | 1219 | regulator_disable(mmc->supply.vqmmc); |
7c0136ef UH |
1220 | host->vqmmc_enabled = false; |
1221 | } | |
237fb5e6 | 1222 | |
1da177e4 LT |
1223 | break; |
1224 | case MMC_POWER_UP: | |
599c1d5c UH |
1225 | if (!IS_ERR(mmc->supply.vmmc)) |
1226 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, ios->vdd); | |
1227 | ||
7d72a1d4 UH |
1228 | /* |
1229 | * The ST Micro variant doesn't have the PL180s MCI_PWR_UP | |
1230 | * and instead uses MCI_PWR_ON so apply whatever value is | |
1231 | * configured in the variant data. | |
1232 | */ | |
1233 | pwr |= variant->pwrreg_powerup; | |
1234 | ||
1235 | break; | |
1da177e4 | 1236 | case MMC_POWER_ON: |
7c0136ef | 1237 | if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) { |
db90f91f LJ |
1238 | ret = regulator_enable(mmc->supply.vqmmc); |
1239 | if (ret < 0) | |
1240 | dev_err(mmc_dev(mmc), | |
1241 | "failed to enable vqmmc regulator\n"); | |
7c0136ef UH |
1242 | else |
1243 | host->vqmmc_enabled = true; | |
db90f91f | 1244 | } |
237fb5e6 | 1245 | |
1da177e4 LT |
1246 | pwr |= MCI_PWR_ON; |
1247 | break; | |
1248 | } | |
1249 | ||
4d1a3a0d UH |
1250 | if (variant->signal_direction && ios->power_mode != MMC_POWER_OFF) { |
1251 | /* | |
1252 | * The ST Micro variant has some additional bits | |
1253 | * indicating signal direction for the signals in | |
1254 | * the SD/MMC bus and feedback-clock usage. | |
1255 | */ | |
1256 | pwr |= host->plat->sigdir; | |
1257 | ||
1258 | if (ios->bus_width == MMC_BUS_WIDTH_4) | |
1259 | pwr &= ~MCI_ST_DATA74DIREN; | |
1260 | else if (ios->bus_width == MMC_BUS_WIDTH_1) | |
1261 | pwr &= (~MCI_ST_DATA74DIREN & | |
1262 | ~MCI_ST_DATA31DIREN & | |
1263 | ~MCI_ST_DATA2DIREN); | |
1264 | } | |
1265 | ||
cc30d60e | 1266 | if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) { |
f17a1f06 | 1267 | if (host->hw_designer != AMBA_VENDOR_ST) |
cc30d60e LW |
1268 | pwr |= MCI_ROD; |
1269 | else { | |
1270 | /* | |
1271 | * The ST Micro variant use the ROD bit for something | |
1272 | * else and only has OD (Open Drain). | |
1273 | */ | |
1274 | pwr |= MCI_OD; | |
1275 | } | |
1276 | } | |
1da177e4 | 1277 | |
f4670dae UH |
1278 | /* |
1279 | * If clock = 0 and the variant requires the MMCIPOWER to be used for | |
1280 | * gating the clock, the MCI_PWR_ON bit is cleared. | |
1281 | */ | |
1282 | if (!ios->clock && variant->pwrreg_clkgate) | |
1283 | pwr &= ~MCI_PWR_ON; | |
1284 | ||
a6a6464a LW |
1285 | spin_lock_irqsave(&host->lock, flags); |
1286 | ||
1287 | mmci_set_clkreg(host, ios->clock); | |
7437cfa5 | 1288 | mmci_write_pwrreg(host, pwr); |
f829c042 | 1289 | mmci_reg_delay(host); |
a6a6464a LW |
1290 | |
1291 | spin_unlock_irqrestore(&host->lock, flags); | |
2cd976c4 | 1292 | |
2cd976c4 UH |
1293 | pm_runtime_mark_last_busy(mmc_dev(mmc)); |
1294 | pm_runtime_put_autosuspend(mmc_dev(mmc)); | |
1da177e4 LT |
1295 | } |
1296 | ||
89001446 RK |
1297 | static int mmci_get_ro(struct mmc_host *mmc) |
1298 | { | |
1299 | struct mmci_host *host = mmc_priv(mmc); | |
1300 | ||
1301 | if (host->gpio_wp == -ENOSYS) | |
1302 | return -ENOSYS; | |
1303 | ||
18a06301 | 1304 | return gpio_get_value_cansleep(host->gpio_wp); |
89001446 RK |
1305 | } |
1306 | ||
1307 | static int mmci_get_cd(struct mmc_host *mmc) | |
1308 | { | |
1309 | struct mmci_host *host = mmc_priv(mmc); | |
29719445 | 1310 | struct mmci_platform_data *plat = host->plat; |
89001446 RK |
1311 | unsigned int status; |
1312 | ||
4b8caec0 RV |
1313 | if (host->gpio_cd == -ENOSYS) { |
1314 | if (!plat->status) | |
1315 | return 1; /* Assume always present */ | |
1316 | ||
29719445 | 1317 | status = plat->status(mmc_dev(host->mmc)); |
4b8caec0 | 1318 | } else |
18a06301 LW |
1319 | status = !!gpio_get_value_cansleep(host->gpio_cd) |
1320 | ^ plat->cd_invert; | |
89001446 | 1321 | |
74bc8093 RK |
1322 | /* |
1323 | * Use positive logic throughout - status is zero for no card, | |
1324 | * non-zero for card inserted. | |
1325 | */ | |
1326 | return status; | |
89001446 RK |
1327 | } |
1328 | ||
0f3ed7f7 UH |
1329 | static int mmci_sig_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios) |
1330 | { | |
1331 | int ret = 0; | |
1332 | ||
1333 | if (!IS_ERR(mmc->supply.vqmmc)) { | |
1334 | ||
1335 | pm_runtime_get_sync(mmc_dev(mmc)); | |
1336 | ||
1337 | switch (ios->signal_voltage) { | |
1338 | case MMC_SIGNAL_VOLTAGE_330: | |
1339 | ret = regulator_set_voltage(mmc->supply.vqmmc, | |
1340 | 2700000, 3600000); | |
1341 | break; | |
1342 | case MMC_SIGNAL_VOLTAGE_180: | |
1343 | ret = regulator_set_voltage(mmc->supply.vqmmc, | |
1344 | 1700000, 1950000); | |
1345 | break; | |
1346 | case MMC_SIGNAL_VOLTAGE_120: | |
1347 | ret = regulator_set_voltage(mmc->supply.vqmmc, | |
1348 | 1100000, 1300000); | |
1349 | break; | |
1350 | } | |
1351 | ||
1352 | if (ret) | |
1353 | dev_warn(mmc_dev(mmc), "Voltage switch failed\n"); | |
1354 | ||
1355 | pm_runtime_mark_last_busy(mmc_dev(mmc)); | |
1356 | pm_runtime_put_autosuspend(mmc_dev(mmc)); | |
1357 | } | |
1358 | ||
1359 | return ret; | |
1360 | } | |
1361 | ||
148b8b39 RV |
1362 | static irqreturn_t mmci_cd_irq(int irq, void *dev_id) |
1363 | { | |
1364 | struct mmci_host *host = dev_id; | |
1365 | ||
1366 | mmc_detect_change(host->mmc, msecs_to_jiffies(500)); | |
1367 | ||
1368 | return IRQ_HANDLED; | |
1369 | } | |
1370 | ||
01259620 | 1371 | static struct mmc_host_ops mmci_ops = { |
1da177e4 | 1372 | .request = mmci_request, |
58c7ccbf PF |
1373 | .pre_req = mmci_pre_request, |
1374 | .post_req = mmci_post_request, | |
1da177e4 | 1375 | .set_ios = mmci_set_ios, |
89001446 RK |
1376 | .get_ro = mmci_get_ro, |
1377 | .get_cd = mmci_get_cd, | |
0f3ed7f7 | 1378 | .start_signal_voltage_switch = mmci_sig_volt_switch, |
1da177e4 LT |
1379 | }; |
1380 | ||
000bc9d5 LJ |
1381 | #ifdef CONFIG_OF |
1382 | static void mmci_dt_populate_generic_pdata(struct device_node *np, | |
1383 | struct mmci_platform_data *pdata) | |
1384 | { | |
1385 | int bus_width = 0; | |
1386 | ||
9a597016 | 1387 | pdata->gpio_wp = of_get_named_gpio(np, "wp-gpios", 0); |
9a597016 | 1388 | pdata->gpio_cd = of_get_named_gpio(np, "cd-gpios", 0); |
000bc9d5 LJ |
1389 | |
1390 | if (of_get_property(np, "cd-inverted", NULL)) | |
1391 | pdata->cd_invert = true; | |
1392 | else | |
1393 | pdata->cd_invert = false; | |
1394 | ||
1395 | of_property_read_u32(np, "max-frequency", &pdata->f_max); | |
1396 | if (!pdata->f_max) | |
1397 | pr_warn("%s has no 'max-frequency' property\n", np->full_name); | |
1398 | ||
1399 | if (of_get_property(np, "mmc-cap-mmc-highspeed", NULL)) | |
1400 | pdata->capabilities |= MMC_CAP_MMC_HIGHSPEED; | |
1401 | if (of_get_property(np, "mmc-cap-sd-highspeed", NULL)) | |
1402 | pdata->capabilities |= MMC_CAP_SD_HIGHSPEED; | |
1403 | ||
1404 | of_property_read_u32(np, "bus-width", &bus_width); | |
1405 | switch (bus_width) { | |
1406 | case 0 : | |
1407 | /* No bus-width supplied. */ | |
1408 | break; | |
1409 | case 4 : | |
1410 | pdata->capabilities |= MMC_CAP_4_BIT_DATA; | |
1411 | break; | |
1412 | case 8 : | |
1413 | pdata->capabilities |= MMC_CAP_8_BIT_DATA; | |
1414 | break; | |
1415 | default : | |
1416 | pr_warn("%s: Unsupported bus width\n", np->full_name); | |
1417 | } | |
1418 | } | |
c0a120a4 LJ |
1419 | #else |
1420 | static void mmci_dt_populate_generic_pdata(struct device_node *np, | |
1421 | struct mmci_platform_data *pdata) | |
1422 | { | |
1423 | return; | |
1424 | } | |
000bc9d5 LJ |
1425 | #endif |
1426 | ||
c3be1efd | 1427 | static int mmci_probe(struct amba_device *dev, |
aa25afad | 1428 | const struct amba_id *id) |
1da177e4 | 1429 | { |
6ef297f8 | 1430 | struct mmci_platform_data *plat = dev->dev.platform_data; |
000bc9d5 | 1431 | struct device_node *np = dev->dev.of_node; |
4956e109 | 1432 | struct variant_data *variant = id->data; |
1da177e4 LT |
1433 | struct mmci_host *host; |
1434 | struct mmc_host *mmc; | |
1435 | int ret; | |
1436 | ||
000bc9d5 LJ |
1437 | /* Must have platform data or Device Tree. */ |
1438 | if (!plat && !np) { | |
1439 | dev_err(&dev->dev, "No plat data or DT found\n"); | |
1440 | return -EINVAL; | |
1da177e4 LT |
1441 | } |
1442 | ||
b9b52918 LJ |
1443 | if (!plat) { |
1444 | plat = devm_kzalloc(&dev->dev, sizeof(*plat), GFP_KERNEL); | |
1445 | if (!plat) | |
1446 | return -ENOMEM; | |
1447 | } | |
1448 | ||
000bc9d5 LJ |
1449 | if (np) |
1450 | mmci_dt_populate_generic_pdata(np, plat); | |
1451 | ||
1da177e4 LT |
1452 | ret = amba_request_regions(dev, DRIVER_NAME); |
1453 | if (ret) | |
1454 | goto out; | |
1455 | ||
1456 | mmc = mmc_alloc_host(sizeof(struct mmci_host), &dev->dev); | |
1457 | if (!mmc) { | |
1458 | ret = -ENOMEM; | |
1459 | goto rel_regions; | |
1460 | } | |
1461 | ||
1462 | host = mmc_priv(mmc); | |
4ea580f1 | 1463 | host->mmc = mmc; |
012b7d33 | 1464 | |
89001446 RK |
1465 | host->gpio_wp = -ENOSYS; |
1466 | host->gpio_cd = -ENOSYS; | |
148b8b39 | 1467 | host->gpio_cd_irq = -1; |
89001446 | 1468 | |
012b7d33 RK |
1469 | host->hw_designer = amba_manf(dev); |
1470 | host->hw_revision = amba_rev(dev); | |
64de0289 LW |
1471 | dev_dbg(mmc_dev(mmc), "designer ID = 0x%02x\n", host->hw_designer); |
1472 | dev_dbg(mmc_dev(mmc), "revision = 0x%01x\n", host->hw_revision); | |
012b7d33 | 1473 | |
665ba56f | 1474 | host->clk = devm_clk_get(&dev->dev, NULL); |
1da177e4 LT |
1475 | if (IS_ERR(host->clk)) { |
1476 | ret = PTR_ERR(host->clk); | |
1da177e4 LT |
1477 | goto host_free; |
1478 | } | |
1479 | ||
ac940938 | 1480 | ret = clk_prepare_enable(host->clk); |
1da177e4 | 1481 | if (ret) |
665ba56f | 1482 | goto host_free; |
1da177e4 LT |
1483 | |
1484 | host->plat = plat; | |
4956e109 | 1485 | host->variant = variant; |
1da177e4 | 1486 | host->mclk = clk_get_rate(host->clk); |
c8df9a53 LW |
1487 | /* |
1488 | * According to the spec, mclk is max 100 MHz, | |
1489 | * so we try to adjust the clock down to this, | |
1490 | * (if possible). | |
1491 | */ | |
1492 | if (host->mclk > 100000000) { | |
1493 | ret = clk_set_rate(host->clk, 100000000); | |
1494 | if (ret < 0) | |
1495 | goto clk_disable; | |
1496 | host->mclk = clk_get_rate(host->clk); | |
64de0289 LW |
1497 | dev_dbg(mmc_dev(mmc), "eventual mclk rate: %u Hz\n", |
1498 | host->mclk); | |
c8df9a53 | 1499 | } |
c8ebae37 | 1500 | host->phybase = dev->res.start; |
dc890c2d | 1501 | host->base = ioremap(dev->res.start, resource_size(&dev->res)); |
1da177e4 LT |
1502 | if (!host->base) { |
1503 | ret = -ENOMEM; | |
1504 | goto clk_disable; | |
1505 | } | |
1506 | ||
01259620 UH |
1507 | if (variant->busy_detect) { |
1508 | mmci_ops.card_busy = mmci_card_busy; | |
1509 | mmci_write_datactrlreg(host, MCI_ST_DPSM_BUSYMODE); | |
1510 | } | |
1511 | ||
1da177e4 | 1512 | mmc->ops = &mmci_ops; |
7f294e49 LW |
1513 | /* |
1514 | * The ARM and ST versions of the block have slightly different | |
1515 | * clock divider equations which means that the minimum divider | |
1516 | * differs too. | |
1517 | */ | |
1518 | if (variant->st_clkdiv) | |
1519 | mmc->f_min = DIV_ROUND_UP(host->mclk, 257); | |
1520 | else | |
1521 | mmc->f_min = DIV_ROUND_UP(host->mclk, 512); | |
808d97cc LW |
1522 | /* |
1523 | * If the platform data supplies a maximum operating | |
1524 | * frequency, this takes precedence. Else, we fall back | |
1525 | * to using the module parameter, which has a (low) | |
1526 | * default value in case it is not specified. Either | |
1527 | * value must not exceed the clock rate into the block, | |
1528 | * of course. | |
1529 | */ | |
1530 | if (plat->f_max) | |
1531 | mmc->f_max = min(host->mclk, plat->f_max); | |
1532 | else | |
1533 | mmc->f_max = min(host->mclk, fmax); | |
64de0289 LW |
1534 | dev_dbg(mmc_dev(mmc), "clocking block at %u Hz\n", mmc->f_max); |
1535 | ||
599c1d5c UH |
1536 | /* Get regulators and the supported OCR mask */ |
1537 | mmc_regulator_get_supply(mmc); | |
1538 | if (!mmc->ocr_avail) | |
34e84f39 | 1539 | mmc->ocr_avail = plat->ocr_mask; |
599c1d5c UH |
1540 | else if (plat->ocr_mask) |
1541 | dev_warn(mmc_dev(mmc), "Platform OCR mask is ignored\n"); | |
1542 | ||
9e6c82cd | 1543 | mmc->caps = plat->capabilities; |
5a092627 | 1544 | mmc->caps2 = plat->capabilities2; |
1da177e4 | 1545 | |
70be208f UH |
1546 | /* We support these PM capabilities. */ |
1547 | mmc->pm_caps = MMC_PM_KEEP_POWER; | |
1548 | ||
1da177e4 LT |
1549 | /* |
1550 | * We can do SGIO | |
1551 | */ | |
a36274e0 | 1552 | mmc->max_segs = NR_SG; |
1da177e4 LT |
1553 | |
1554 | /* | |
08458ef6 RV |
1555 | * Since only a certain number of bits are valid in the data length |
1556 | * register, we must ensure that we don't exceed 2^num-1 bytes in a | |
1557 | * single request. | |
1da177e4 | 1558 | */ |
08458ef6 | 1559 | mmc->max_req_size = (1 << variant->datalength_bits) - 1; |
1da177e4 LT |
1560 | |
1561 | /* | |
1562 | * Set the maximum segment size. Since we aren't doing DMA | |
1563 | * (yet) we are only limited by the data length register. | |
1564 | */ | |
55db890a | 1565 | mmc->max_seg_size = mmc->max_req_size; |
1da177e4 | 1566 | |
fe4a3c7a PO |
1567 | /* |
1568 | * Block size can be up to 2048 bytes, but must be a power of two. | |
1569 | */ | |
8f7f6b7e | 1570 | mmc->max_blk_size = 1 << 11; |
fe4a3c7a | 1571 | |
55db890a | 1572 | /* |
8f7f6b7e WD |
1573 | * Limit the number of blocks transferred so that we don't overflow |
1574 | * the maximum request size. | |
55db890a | 1575 | */ |
8f7f6b7e | 1576 | mmc->max_blk_count = mmc->max_req_size >> 11; |
55db890a | 1577 | |
1da177e4 LT |
1578 | spin_lock_init(&host->lock); |
1579 | ||
1580 | writel(0, host->base + MMCIMASK0); | |
1581 | writel(0, host->base + MMCIMASK1); | |
1582 | writel(0xfff, host->base + MMCICLEAR); | |
1583 | ||
2805b9ab RS |
1584 | if (plat->gpio_cd == -EPROBE_DEFER) { |
1585 | ret = -EPROBE_DEFER; | |
1586 | goto err_gpio_cd; | |
1587 | } | |
89001446 RK |
1588 | if (gpio_is_valid(plat->gpio_cd)) { |
1589 | ret = gpio_request(plat->gpio_cd, DRIVER_NAME " (cd)"); | |
1590 | if (ret == 0) | |
1591 | ret = gpio_direction_input(plat->gpio_cd); | |
1592 | if (ret == 0) | |
1593 | host->gpio_cd = plat->gpio_cd; | |
1594 | else if (ret != -ENOSYS) | |
1595 | goto err_gpio_cd; | |
148b8b39 | 1596 | |
17ee083b LW |
1597 | /* |
1598 | * A gpio pin that will detect cards when inserted and removed | |
1599 | * will most likely want to trigger on the edges if it is | |
1600 | * 0 when ejected and 1 when inserted (or mutatis mutandis | |
1601 | * for the inverted case) so we request triggers on both | |
1602 | * edges. | |
1603 | */ | |
148b8b39 | 1604 | ret = request_any_context_irq(gpio_to_irq(plat->gpio_cd), |
17ee083b LW |
1605 | mmci_cd_irq, |
1606 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
1607 | DRIVER_NAME " (cd)", host); | |
148b8b39 RV |
1608 | if (ret >= 0) |
1609 | host->gpio_cd_irq = gpio_to_irq(plat->gpio_cd); | |
89001446 | 1610 | } |
2805b9ab RS |
1611 | if (plat->gpio_wp == -EPROBE_DEFER) { |
1612 | ret = -EPROBE_DEFER; | |
1613 | goto err_gpio_wp; | |
1614 | } | |
89001446 RK |
1615 | if (gpio_is_valid(plat->gpio_wp)) { |
1616 | ret = gpio_request(plat->gpio_wp, DRIVER_NAME " (wp)"); | |
1617 | if (ret == 0) | |
1618 | ret = gpio_direction_input(plat->gpio_wp); | |
1619 | if (ret == 0) | |
1620 | host->gpio_wp = plat->gpio_wp; | |
1621 | else if (ret != -ENOSYS) | |
1622 | goto err_gpio_wp; | |
1623 | } | |
1624 | ||
4b8caec0 RV |
1625 | if ((host->plat->status || host->gpio_cd != -ENOSYS) |
1626 | && host->gpio_cd_irq < 0) | |
148b8b39 RV |
1627 | mmc->caps |= MMC_CAP_NEEDS_POLL; |
1628 | ||
dace1453 | 1629 | ret = request_irq(dev->irq[0], mmci_irq, IRQF_SHARED, DRIVER_NAME " (cmd)", host); |
1da177e4 LT |
1630 | if (ret) |
1631 | goto unmap; | |
1632 | ||
dfb85185 | 1633 | if (!dev->irq[1]) |
2686b4b4 LW |
1634 | host->singleirq = true; |
1635 | else { | |
1636 | ret = request_irq(dev->irq[1], mmci_pio_irq, IRQF_SHARED, | |
1637 | DRIVER_NAME " (pio)", host); | |
1638 | if (ret) | |
1639 | goto irq0_free; | |
1640 | } | |
1da177e4 | 1641 | |
8cb28155 | 1642 | writel(MCI_IRQENABLE, host->base + MMCIMASK0); |
1da177e4 LT |
1643 | |
1644 | amba_set_drvdata(dev, mmc); | |
1645 | ||
c8ebae37 RK |
1646 | dev_info(&dev->dev, "%s: PL%03x manf %x rev%u at 0x%08llx irq %d,%d (pio)\n", |
1647 | mmc_hostname(mmc), amba_part(dev), amba_manf(dev), | |
1648 | amba_rev(dev), (unsigned long long)dev->res.start, | |
1649 | dev->irq[0], dev->irq[1]); | |
1650 | ||
1651 | mmci_dma_setup(host); | |
1da177e4 | 1652 | |
2cd976c4 UH |
1653 | pm_runtime_set_autosuspend_delay(&dev->dev, 50); |
1654 | pm_runtime_use_autosuspend(&dev->dev); | |
1c3be369 RK |
1655 | pm_runtime_put(&dev->dev); |
1656 | ||
8c11a94d RK |
1657 | mmc_add_host(mmc); |
1658 | ||
1da177e4 LT |
1659 | return 0; |
1660 | ||
1661 | irq0_free: | |
1662 | free_irq(dev->irq[0], host); | |
1663 | unmap: | |
89001446 RK |
1664 | if (host->gpio_wp != -ENOSYS) |
1665 | gpio_free(host->gpio_wp); | |
1666 | err_gpio_wp: | |
148b8b39 RV |
1667 | if (host->gpio_cd_irq >= 0) |
1668 | free_irq(host->gpio_cd_irq, host); | |
89001446 RK |
1669 | if (host->gpio_cd != -ENOSYS) |
1670 | gpio_free(host->gpio_cd); | |
1671 | err_gpio_cd: | |
1da177e4 LT |
1672 | iounmap(host->base); |
1673 | clk_disable: | |
ac940938 | 1674 | clk_disable_unprepare(host->clk); |
1da177e4 LT |
1675 | host_free: |
1676 | mmc_free_host(mmc); | |
1677 | rel_regions: | |
1678 | amba_release_regions(dev); | |
1679 | out: | |
1680 | return ret; | |
1681 | } | |
1682 | ||
6e0ee714 | 1683 | static int mmci_remove(struct amba_device *dev) |
1da177e4 LT |
1684 | { |
1685 | struct mmc_host *mmc = amba_get_drvdata(dev); | |
1686 | ||
1da177e4 LT |
1687 | if (mmc) { |
1688 | struct mmci_host *host = mmc_priv(mmc); | |
1689 | ||
1c3be369 RK |
1690 | /* |
1691 | * Undo pm_runtime_put() in probe. We use the _sync | |
1692 | * version here so that we can access the primecell. | |
1693 | */ | |
1694 | pm_runtime_get_sync(&dev->dev); | |
1695 | ||
1da177e4 LT |
1696 | mmc_remove_host(mmc); |
1697 | ||
1698 | writel(0, host->base + MMCIMASK0); | |
1699 | writel(0, host->base + MMCIMASK1); | |
1700 | ||
1701 | writel(0, host->base + MMCICOMMAND); | |
1702 | writel(0, host->base + MMCIDATACTRL); | |
1703 | ||
c8ebae37 | 1704 | mmci_dma_release(host); |
1da177e4 | 1705 | free_irq(dev->irq[0], host); |
2686b4b4 LW |
1706 | if (!host->singleirq) |
1707 | free_irq(dev->irq[1], host); | |
1da177e4 | 1708 | |
89001446 RK |
1709 | if (host->gpio_wp != -ENOSYS) |
1710 | gpio_free(host->gpio_wp); | |
148b8b39 RV |
1711 | if (host->gpio_cd_irq >= 0) |
1712 | free_irq(host->gpio_cd_irq, host); | |
89001446 RK |
1713 | if (host->gpio_cd != -ENOSYS) |
1714 | gpio_free(host->gpio_cd); | |
1715 | ||
1da177e4 | 1716 | iounmap(host->base); |
ac940938 | 1717 | clk_disable_unprepare(host->clk); |
1da177e4 LT |
1718 | |
1719 | mmc_free_host(mmc); | |
1720 | ||
1721 | amba_release_regions(dev); | |
1722 | } | |
1723 | ||
1724 | return 0; | |
1725 | } | |
1726 | ||
48fa7003 UH |
1727 | #ifdef CONFIG_SUSPEND |
1728 | static int mmci_suspend(struct device *dev) | |
1da177e4 | 1729 | { |
48fa7003 UH |
1730 | struct amba_device *adev = to_amba_device(dev); |
1731 | struct mmc_host *mmc = amba_get_drvdata(adev); | |
1da177e4 LT |
1732 | |
1733 | if (mmc) { | |
1734 | struct mmci_host *host = mmc_priv(mmc); | |
578aebc7 UH |
1735 | pm_runtime_get_sync(dev); |
1736 | writel(0, host->base + MMCIMASK0); | |
1da177e4 LT |
1737 | } |
1738 | ||
578aebc7 | 1739 | return 0; |
1da177e4 LT |
1740 | } |
1741 | ||
48fa7003 | 1742 | static int mmci_resume(struct device *dev) |
1da177e4 | 1743 | { |
48fa7003 UH |
1744 | struct amba_device *adev = to_amba_device(dev); |
1745 | struct mmc_host *mmc = amba_get_drvdata(adev); | |
1da177e4 LT |
1746 | |
1747 | if (mmc) { | |
1748 | struct mmci_host *host = mmc_priv(mmc); | |
1da177e4 | 1749 | writel(MCI_IRQENABLE, host->base + MMCIMASK0); |
2cd976c4 | 1750 | pm_runtime_put(dev); |
1da177e4 LT |
1751 | } |
1752 | ||
578aebc7 | 1753 | return 0; |
1da177e4 | 1754 | } |
1da177e4 LT |
1755 | #endif |
1756 | ||
8259293a | 1757 | #ifdef CONFIG_PM_RUNTIME |
1ff44433 UH |
1758 | static void mmci_save(struct mmci_host *host) |
1759 | { | |
1760 | unsigned long flags; | |
1761 | ||
1762 | if (host->variant->pwrreg_nopower) { | |
1763 | spin_lock_irqsave(&host->lock, flags); | |
1764 | ||
1765 | writel(0, host->base + MMCIMASK0); | |
1766 | writel(0, host->base + MMCIDATACTRL); | |
1767 | writel(0, host->base + MMCIPOWER); | |
1768 | writel(0, host->base + MMCICLOCK); | |
1769 | mmci_reg_delay(host); | |
1770 | ||
1771 | spin_unlock_irqrestore(&host->lock, flags); | |
1772 | } | |
1773 | ||
1774 | } | |
1775 | ||
1776 | static void mmci_restore(struct mmci_host *host) | |
1777 | { | |
1778 | unsigned long flags; | |
1779 | ||
1780 | if (host->variant->pwrreg_nopower) { | |
1781 | spin_lock_irqsave(&host->lock, flags); | |
1782 | ||
1783 | writel(host->clk_reg, host->base + MMCICLOCK); | |
1784 | writel(host->datactrl_reg, host->base + MMCIDATACTRL); | |
1785 | writel(host->pwr_reg, host->base + MMCIPOWER); | |
1786 | writel(MCI_IRQENABLE, host->base + MMCIMASK0); | |
1787 | mmci_reg_delay(host); | |
1788 | ||
1789 | spin_unlock_irqrestore(&host->lock, flags); | |
1790 | } | |
1791 | } | |
1792 | ||
8259293a UH |
1793 | static int mmci_runtime_suspend(struct device *dev) |
1794 | { | |
1795 | struct amba_device *adev = to_amba_device(dev); | |
1796 | struct mmc_host *mmc = amba_get_drvdata(adev); | |
1797 | ||
1798 | if (mmc) { | |
1799 | struct mmci_host *host = mmc_priv(mmc); | |
e36bd9c6 | 1800 | pinctrl_pm_select_sleep_state(dev); |
1ff44433 | 1801 | mmci_save(host); |
8259293a UH |
1802 | clk_disable_unprepare(host->clk); |
1803 | } | |
1804 | ||
1805 | return 0; | |
1806 | } | |
1807 | ||
1808 | static int mmci_runtime_resume(struct device *dev) | |
1809 | { | |
1810 | struct amba_device *adev = to_amba_device(dev); | |
1811 | struct mmc_host *mmc = amba_get_drvdata(adev); | |
1812 | ||
1813 | if (mmc) { | |
1814 | struct mmci_host *host = mmc_priv(mmc); | |
1815 | clk_prepare_enable(host->clk); | |
1ff44433 | 1816 | mmci_restore(host); |
e36bd9c6 | 1817 | pinctrl_pm_select_default_state(dev); |
8259293a UH |
1818 | } |
1819 | ||
1820 | return 0; | |
1821 | } | |
1822 | #endif | |
1823 | ||
48fa7003 UH |
1824 | static const struct dev_pm_ops mmci_dev_pm_ops = { |
1825 | SET_SYSTEM_SLEEP_PM_OPS(mmci_suspend, mmci_resume) | |
8259293a | 1826 | SET_RUNTIME_PM_OPS(mmci_runtime_suspend, mmci_runtime_resume, NULL) |
48fa7003 UH |
1827 | }; |
1828 | ||
1da177e4 LT |
1829 | static struct amba_id mmci_ids[] = { |
1830 | { | |
1831 | .id = 0x00041180, | |
768fbc18 | 1832 | .mask = 0xff0fffff, |
4956e109 | 1833 | .data = &variant_arm, |
1da177e4 | 1834 | }, |
768fbc18 PM |
1835 | { |
1836 | .id = 0x01041180, | |
1837 | .mask = 0xff0fffff, | |
1838 | .data = &variant_arm_extended_fifo, | |
1839 | }, | |
3a37298a PM |
1840 | { |
1841 | .id = 0x02041180, | |
1842 | .mask = 0xff0fffff, | |
1843 | .data = &variant_arm_extended_fifo_hwfc, | |
1844 | }, | |
1da177e4 LT |
1845 | { |
1846 | .id = 0x00041181, | |
1847 | .mask = 0x000fffff, | |
4956e109 | 1848 | .data = &variant_arm, |
1da177e4 | 1849 | }, |
cc30d60e LW |
1850 | /* ST Micro variants */ |
1851 | { | |
1852 | .id = 0x00180180, | |
1853 | .mask = 0x00ffffff, | |
4956e109 | 1854 | .data = &variant_u300, |
cc30d60e | 1855 | }, |
34fd4213 LW |
1856 | { |
1857 | .id = 0x10180180, | |
1858 | .mask = 0xf0ffffff, | |
1859 | .data = &variant_nomadik, | |
1860 | }, | |
cc30d60e LW |
1861 | { |
1862 | .id = 0x00280180, | |
1863 | .mask = 0x00ffffff, | |
4956e109 RV |
1864 | .data = &variant_u300, |
1865 | }, | |
1866 | { | |
1867 | .id = 0x00480180, | |
1784b157 | 1868 | .mask = 0xf0ffffff, |
4956e109 | 1869 | .data = &variant_ux500, |
cc30d60e | 1870 | }, |
1784b157 PL |
1871 | { |
1872 | .id = 0x10480180, | |
1873 | .mask = 0xf0ffffff, | |
1874 | .data = &variant_ux500v2, | |
1875 | }, | |
1da177e4 LT |
1876 | { 0, 0 }, |
1877 | }; | |
1878 | ||
9f99835f DM |
1879 | MODULE_DEVICE_TABLE(amba, mmci_ids); |
1880 | ||
1da177e4 LT |
1881 | static struct amba_driver mmci_driver = { |
1882 | .drv = { | |
1883 | .name = DRIVER_NAME, | |
48fa7003 | 1884 | .pm = &mmci_dev_pm_ops, |
1da177e4 LT |
1885 | }, |
1886 | .probe = mmci_probe, | |
0433c143 | 1887 | .remove = mmci_remove, |
1da177e4 LT |
1888 | .id_table = mmci_ids, |
1889 | }; | |
1890 | ||
9e5ed094 | 1891 | module_amba_driver(mmci_driver); |
1da177e4 | 1892 | |
1da177e4 LT |
1893 | module_param(fmax, uint, 0444); |
1894 | ||
1895 | MODULE_DESCRIPTION("ARM PrimeCell PL180/181 Multimedia Card Interface driver"); | |
1896 | MODULE_LICENSE("GPL"); |