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Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001/*
2 * linux/drivers/mmc/host/tmio_mmc_pio.c
3 *
4 * Copyright (C) 2011 Guennadi Liakhovetski
5 * Copyright (C) 2007 Ian Molton
6 * Copyright (C) 2004 Ian Molton
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * Driver for the MMC / SD / SDIO IP found in:
13 *
14 * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs
15 *
16 * This driver draws mainly on scattered spec sheets, Reverse engineering
17 * of the toshiba e800 SD driver and some parts of the 2.4 ASIC3 driver (4 bit
18 * support). (Further 4 bit support from a later datasheet).
19 *
20 * TODO:
21 * Investigate using a workqueue for PIO transfers
22 * Eliminate FIXMEs
23 * SDIO support
24 * Better Power management
25 * Handle MMC errors better
26 * double buffer support
27 *
28 */
29
30#include <linux/delay.h>
31#include <linux/device.h>
32#include <linux/highmem.h>
33#include <linux/interrupt.h>
34#include <linux/io.h>
35#include <linux/irq.h>
36#include <linux/mfd/tmio.h>
37#include <linux/mmc/host.h>
Guennadi Liakhovetski0f506a92012-06-20 19:10:35 +020038#include <linux/mmc/mmc.h>
Guennadi Liakhovetskifd0ea652012-04-30 23:31:57 +020039#include <linux/mmc/slot-gpio.h>
Simon Hormancba179a2011-03-24 09:48:36 +010040#include <linux/mmc/tmio.h>
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010041#include <linux/module.h>
42#include <linux/pagemap.h>
43#include <linux/platform_device.h>
Rafael J. Wysockic419e612012-03-13 01:01:51 +010044#include <linux/pm_qos.h>
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +000045#include <linux/pm_runtime.h>
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +010046#include <linux/regulator/consumer.h>
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010047#include <linux/scatterlist.h>
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010048#include <linux/spinlock.h>
Guennadi Liakhovetskie3de2be2012-01-06 13:06:51 +010049#include <linux/workqueue.h>
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010050
51#include "tmio_mmc.h"
52
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010053void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
54{
Simon Horman54680fe2011-08-25 10:27:25 +090055 host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ);
56 sd_ctrl_write32(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010057}
58
59void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
60{
Simon Horman54680fe2011-08-25 10:27:25 +090061 host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ);
62 sd_ctrl_write32(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +010063}
64
65static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i)
66{
67 sd_ctrl_write32(host, CTL_STATUS, ~i);
68}
69
70static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data)
71{
72 host->sg_len = data->sg_len;
73 host->sg_ptr = data->sg;
74 host->sg_orig = data->sg;
75 host->sg_off = 0;
76}
77
78static int tmio_mmc_next_sg(struct tmio_mmc_host *host)
79{
80 host->sg_ptr = sg_next(host->sg_ptr);
81 host->sg_off = 0;
82 return --host->sg_len;
83}
84
85#ifdef CONFIG_MMC_DEBUG
86
87#define STATUS_TO_TEXT(a, status, i) \
88 do { \
89 if (status & TMIO_STAT_##a) { \
90 if (i++) \
91 printk(" | "); \
92 printk(#a); \
93 } \
94 } while (0)
95
96static void pr_debug_status(u32 status)
97{
98 int i = 0;
Girish K Sa3c76eb2011-10-11 11:44:09 +053099 pr_debug("status: %08x = ", status);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100100 STATUS_TO_TEXT(CARD_REMOVE, status, i);
101 STATUS_TO_TEXT(CARD_INSERT, status, i);
102 STATUS_TO_TEXT(SIGSTATE, status, i);
103 STATUS_TO_TEXT(WRPROTECT, status, i);
104 STATUS_TO_TEXT(CARD_REMOVE_A, status, i);
105 STATUS_TO_TEXT(CARD_INSERT_A, status, i);
106 STATUS_TO_TEXT(SIGSTATE_A, status, i);
107 STATUS_TO_TEXT(CMD_IDX_ERR, status, i);
108 STATUS_TO_TEXT(STOPBIT_ERR, status, i);
109 STATUS_TO_TEXT(ILL_FUNC, status, i);
110 STATUS_TO_TEXT(CMD_BUSY, status, i);
111 STATUS_TO_TEXT(CMDRESPEND, status, i);
112 STATUS_TO_TEXT(DATAEND, status, i);
113 STATUS_TO_TEXT(CRCFAIL, status, i);
114 STATUS_TO_TEXT(DATATIMEOUT, status, i);
115 STATUS_TO_TEXT(CMDTIMEOUT, status, i);
116 STATUS_TO_TEXT(RXOVERFLOW, status, i);
117 STATUS_TO_TEXT(TXUNDERRUN, status, i);
118 STATUS_TO_TEXT(RXRDY, status, i);
119 STATUS_TO_TEXT(TXRQ, status, i);
120 STATUS_TO_TEXT(ILL_ACCESS, status, i);
121 printk("\n");
122}
123
124#else
125#define pr_debug_status(s) do { } while (0)
126#endif
127
128static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
129{
130 struct tmio_mmc_host *host = mmc_priv(mmc);
131
Ulf Hansson7501c432013-10-24 15:58:45 +0200132 if (enable && !host->sdio_irq_enabled) {
133 /* Keep device active while SDIO irq is enabled */
134 pm_runtime_get_sync(mmc_dev(mmc));
135 host->sdio_irq_enabled = true;
136
Simon Horman54680fe2011-08-25 10:27:25 +0900137 host->sdio_irq_mask = TMIO_SDIO_MASK_ALL &
138 ~TMIO_SDIO_STAT_IOIRQ;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100139 sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001);
Simon Horman54680fe2011-08-25 10:27:25 +0900140 sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
Ulf Hansson7501c432013-10-24 15:58:45 +0200141 } else if (!enable && host->sdio_irq_enabled) {
Simon Horman54680fe2011-08-25 10:27:25 +0900142 host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
143 sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100144 sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000);
Ulf Hansson7501c432013-10-24 15:58:45 +0200145
146 host->sdio_irq_enabled = false;
Ulf Hansson03694832013-10-24 16:42:33 +0200147 pm_runtime_mark_last_busy(mmc_dev(mmc));
148 pm_runtime_put_autosuspend(mmc_dev(mmc));
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100149 }
150}
151
Ulf Hanssonae12d252013-10-30 00:16:17 +0100152static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
153 unsigned int new_clock)
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100154{
155 u32 clk = 0, clock;
156
157 if (new_clock) {
158 for (clock = host->mmc->f_min, clk = 0x80000080;
159 new_clock >= (clock<<1); clk >>= 1)
160 clock <<= 1;
161 clk |= 0x100;
162 }
163
164 if (host->set_clk_div)
165 host->set_clk_div(host->pdev, (clk>>22) & 1);
166
167 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & 0x1ff);
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100168 msleep(10);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100169}
170
171static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
172{
Guennadi Liakhovetski69d1fe12011-03-09 17:28:55 +0100173 /* implicit BUG_ON(!res) */
Kuninori Morimoto5d60e502013-11-20 00:31:06 -0800174 if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
Guennadi Liakhovetski69d1fe12011-03-09 17:28:55 +0100175 sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000);
176 msleep(10);
177 }
Guennadi Liakhovetskid9b03422011-03-10 18:43:07 +0100178
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100179 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~0x0100 &
180 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
181 msleep(10);
182}
183
184static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
185{
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100186 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, 0x0100 |
187 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
188 msleep(10);
Guennadi Liakhovetskid9b03422011-03-10 18:43:07 +0100189
Guennadi Liakhovetski69d1fe12011-03-09 17:28:55 +0100190 /* implicit BUG_ON(!res) */
Kuninori Morimoto5d60e502013-11-20 00:31:06 -0800191 if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
Guennadi Liakhovetski69d1fe12011-03-09 17:28:55 +0100192 sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
193 msleep(10);
194 }
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100195}
196
197static void tmio_mmc_reset(struct tmio_mmc_host *host)
198{
199 /* FIXME - should we set stop clock reg here */
200 sd_ctrl_write16(host, CTL_RESET_SD, 0x0000);
Guennadi Liakhovetski69d1fe12011-03-09 17:28:55 +0100201 /* implicit BUG_ON(!res) */
Kuninori Morimoto5d60e502013-11-20 00:31:06 -0800202 if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG)
Guennadi Liakhovetski69d1fe12011-03-09 17:28:55 +0100203 sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100204 msleep(10);
205 sd_ctrl_write16(host, CTL_RESET_SD, 0x0001);
Kuninori Morimoto5d60e502013-11-20 00:31:06 -0800206 if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG)
Guennadi Liakhovetski69d1fe12011-03-09 17:28:55 +0100207 sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100208 msleep(10);
209}
210
211static void tmio_mmc_reset_work(struct work_struct *work)
212{
213 struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
214 delayed_reset_work.work);
215 struct mmc_request *mrq;
216 unsigned long flags;
217
218 spin_lock_irqsave(&host->lock, flags);
219 mrq = host->mrq;
220
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000221 /*
222 * is request already finished? Since we use a non-blocking
223 * cancel_delayed_work(), it can happen, that a .set_ios() call preempts
224 * us, so, have to check for IS_ERR(host->mrq)
225 */
226 if (IS_ERR_OR_NULL(mrq)
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100227 || time_is_after_jiffies(host->last_req_ts +
228 msecs_to_jiffies(2000))) {
229 spin_unlock_irqrestore(&host->lock, flags);
230 return;
231 }
232
233 dev_warn(&host->pdev->dev,
234 "timeout waiting for hardware interrupt (CMD%u)\n",
235 mrq->cmd->opcode);
236
237 if (host->data)
238 host->data->error = -ETIMEDOUT;
239 else if (host->cmd)
240 host->cmd->error = -ETIMEDOUT;
241 else
242 mrq->cmd->error = -ETIMEDOUT;
243
244 host->cmd = NULL;
245 host->data = NULL;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100246 host->force_pio = false;
247
248 spin_unlock_irqrestore(&host->lock, flags);
249
250 tmio_mmc_reset(host);
251
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000252 /* Ready for new calls */
253 host->mrq = NULL;
254
Guennadi Liakhovetskie3de2be2012-01-06 13:06:51 +0100255 tmio_mmc_abort_dma(host);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100256 mmc_request_done(host->mmc, mrq);
Ulf Hansson03694832013-10-24 16:42:33 +0200257
258 pm_runtime_mark_last_busy(mmc_dev(host->mmc));
259 pm_runtime_put_autosuspend(mmc_dev(host->mmc));
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100260}
261
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000262/* called with host->lock held, interrupts disabled */
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100263static void tmio_mmc_finish_request(struct tmio_mmc_host *host)
264{
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200265 struct mmc_request *mrq;
266 unsigned long flags;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100267
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200268 spin_lock_irqsave(&host->lock, flags);
269
270 mrq = host->mrq;
271 if (IS_ERR_OR_NULL(mrq)) {
272 spin_unlock_irqrestore(&host->lock, flags);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100273 return;
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200274 }
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100275
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100276 host->cmd = NULL;
277 host->data = NULL;
278 host->force_pio = false;
279
280 cancel_delayed_work(&host->delayed_reset_work);
281
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000282 host->mrq = NULL;
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200283 spin_unlock_irqrestore(&host->lock, flags);
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000284
Guennadi Liakhovetskie3de2be2012-01-06 13:06:51 +0100285 if (mrq->cmd->error || (mrq->data && mrq->data->error))
286 tmio_mmc_abort_dma(host);
287
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100288 mmc_request_done(host->mmc, mrq);
Ulf Hansson03694832013-10-24 16:42:33 +0200289
290 pm_runtime_mark_last_busy(mmc_dev(host->mmc));
291 pm_runtime_put_autosuspend(mmc_dev(host->mmc));
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100292}
293
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200294static void tmio_mmc_done_work(struct work_struct *work)
295{
296 struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
297 done);
298 tmio_mmc_finish_request(host);
299}
300
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100301/* These are the bitmasks the tmio chip requires to implement the MMC response
302 * types. Note that R1 and R6 are the same in this scheme. */
303#define APP_CMD 0x0040
304#define RESP_NONE 0x0300
305#define RESP_R1 0x0400
306#define RESP_R1B 0x0500
307#define RESP_R2 0x0600
308#define RESP_R3 0x0700
309#define DATA_PRESENT 0x0800
310#define TRANSFER_READ 0x1000
311#define TRANSFER_MULTI 0x2000
312#define SECURITY_CMD 0x4000
313
314static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd)
315{
316 struct mmc_data *data = host->data;
317 int c = cmd->opcode;
Guennadi Liakhovetskie23cd532012-02-22 13:16:09 +0100318 u32 irq_mask = TMIO_MASK_CMD;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100319
Guennadi Liakhovetski0f506a92012-06-20 19:10:35 +0200320 /* CMD12 is handled by hardware */
321 if (cmd->opcode == MMC_STOP_TRANSMISSION && !cmd->arg) {
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100322 sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x001);
323 return 0;
324 }
325
326 switch (mmc_resp_type(cmd)) {
327 case MMC_RSP_NONE: c |= RESP_NONE; break;
328 case MMC_RSP_R1: c |= RESP_R1; break;
329 case MMC_RSP_R1B: c |= RESP_R1B; break;
330 case MMC_RSP_R2: c |= RESP_R2; break;
331 case MMC_RSP_R3: c |= RESP_R3; break;
332 default:
333 pr_debug("Unknown response type %d\n", mmc_resp_type(cmd));
334 return -EINVAL;
335 }
336
337 host->cmd = cmd;
338
339/* FIXME - this seems to be ok commented out but the spec suggest this bit
340 * should be set when issuing app commands.
341 * if(cmd->flags & MMC_FLAG_ACMD)
342 * c |= APP_CMD;
343 */
344 if (data) {
345 c |= DATA_PRESENT;
346 if (data->blocks > 1) {
347 sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x100);
348 c |= TRANSFER_MULTI;
349 }
350 if (data->flags & MMC_DATA_READ)
351 c |= TRANSFER_READ;
352 }
353
Guennadi Liakhovetskie23cd532012-02-22 13:16:09 +0100354 if (!host->native_hotplug)
355 irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
356 tmio_mmc_enable_mmc_irqs(host, irq_mask);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100357
358 /* Fire off the command */
359 sd_ctrl_write32(host, CTL_ARG_REG, cmd->arg);
360 sd_ctrl_write16(host, CTL_SD_CMD, c);
361
362 return 0;
363}
364
365/*
366 * This chip always returns (at least?) as much data as you ask for.
367 * I'm unsure what happens if you ask for less than a block. This should be
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300368 * looked into to ensure that a funny length read doesn't hose the controller.
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100369 */
370static void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
371{
372 struct mmc_data *data = host->data;
373 void *sg_virt;
374 unsigned short *buf;
375 unsigned int count;
376 unsigned long flags;
377
378 if ((host->chan_tx || host->chan_rx) && !host->force_pio) {
379 pr_err("PIO IRQ in DMA mode!\n");
380 return;
381 } else if (!data) {
382 pr_debug("Spurious PIO IRQ\n");
383 return;
384 }
385
386 sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags);
387 buf = (unsigned short *)(sg_virt + host->sg_off);
388
389 count = host->sg_ptr->length - host->sg_off;
390 if (count > data->blksz)
391 count = data->blksz;
392
393 pr_debug("count: %08x offset: %08x flags %08x\n",
394 count, host->sg_off, data->flags);
395
396 /* Transfer the data */
397 if (data->flags & MMC_DATA_READ)
398 sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
399 else
400 sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
401
402 host->sg_off += count;
403
404 tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt);
405
406 if (host->sg_off == host->sg_ptr->length)
407 tmio_mmc_next_sg(host);
408
409 return;
410}
411
412static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host *host)
413{
414 if (host->sg_ptr == &host->bounce_sg) {
415 unsigned long flags;
416 void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags);
417 memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length);
418 tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr);
419 }
420}
421
422/* needs to be called with host->lock held */
423void tmio_mmc_do_data_irq(struct tmio_mmc_host *host)
424{
425 struct mmc_data *data = host->data;
426 struct mmc_command *stop;
427
428 host->data = NULL;
429
430 if (!data) {
431 dev_warn(&host->pdev->dev, "Spurious data end IRQ\n");
432 return;
433 }
434 stop = data->stop;
435
436 /* FIXME - return correct transfer count on errors */
437 if (!data->error)
438 data->bytes_xfered = data->blocks * data->blksz;
439 else
440 data->bytes_xfered = 0;
441
442 pr_debug("Completed data request\n");
443
444 /*
445 * FIXME: other drivers allow an optional stop command of any given type
446 * which we dont do, as the chip can auto generate them.
447 * Perhaps we can be smarter about when to use auto CMD12 and
448 * only issue the auto request when we know this is the desired
449 * stop command, allowing fallback to the stop command the
450 * upper layers expect. For now, we do what works.
451 */
452
453 if (data->flags & MMC_DATA_READ) {
454 if (host->chan_rx && !host->force_pio)
455 tmio_mmc_check_bounce_buffer(host);
456 dev_dbg(&host->pdev->dev, "Complete Rx request %p\n",
457 host->mrq);
458 } else {
459 dev_dbg(&host->pdev->dev, "Complete Tx request %p\n",
460 host->mrq);
461 }
462
463 if (stop) {
Guennadi Liakhovetski0f506a92012-06-20 19:10:35 +0200464 if (stop->opcode == MMC_STOP_TRANSMISSION && !stop->arg)
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100465 sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x000);
466 else
467 BUG();
468 }
469
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200470 schedule_work(&host->done);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100471}
472
473static void tmio_mmc_data_irq(struct tmio_mmc_host *host)
474{
475 struct mmc_data *data;
476 spin_lock(&host->lock);
477 data = host->data;
478
479 if (!data)
480 goto out;
481
482 if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) {
483 /*
484 * Has all data been written out yet? Testing on SuperH showed,
485 * that in most cases the first interrupt comes already with the
486 * BUSY status bit clear, but on some operations, like mount or
487 * in the beginning of a write / sync / umount, there is one
488 * DATAEND interrupt with the BUSY bit set, in this cases
489 * waiting for one more interrupt fixes the problem.
490 */
491 if (!(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_CMD_BUSY)) {
492 tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
493 tasklet_schedule(&host->dma_complete);
494 }
495 } else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) {
496 tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
497 tasklet_schedule(&host->dma_complete);
498 } else {
499 tmio_mmc_do_data_irq(host);
500 tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP);
501 }
502out:
503 spin_unlock(&host->lock);
504}
505
506static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
507 unsigned int stat)
508{
509 struct mmc_command *cmd = host->cmd;
510 int i, addr;
511
512 spin_lock(&host->lock);
513
514 if (!host->cmd) {
515 pr_debug("Spurious CMD irq\n");
516 goto out;
517 }
518
519 host->cmd = NULL;
520
521 /* This controller is sicker than the PXA one. Not only do we need to
522 * drop the top 8 bits of the first response word, we also need to
523 * modify the order of the response for short response command types.
524 */
525
526 for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4)
527 cmd->resp[i] = sd_ctrl_read32(host, addr);
528
529 if (cmd->flags & MMC_RSP_136) {
530 cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24);
531 cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24);
532 cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24);
533 cmd->resp[3] <<= 8;
534 } else if (cmd->flags & MMC_RSP_R3) {
535 cmd->resp[0] = cmd->resp[3];
536 }
537
538 if (stat & TMIO_STAT_CMDTIMEOUT)
539 cmd->error = -ETIMEDOUT;
540 else if (stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC)
541 cmd->error = -EILSEQ;
542
543 /* If there is data to handle we enable data IRQs here, and
544 * we will ultimatley finish the request in the data_end handler.
545 * If theres no data or we encountered an error, finish now.
546 */
547 if (host->data && !cmd->error) {
548 if (host->data->flags & MMC_DATA_READ) {
549 if (host->force_pio || !host->chan_rx)
550 tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP);
551 else
552 tasklet_schedule(&host->dma_issue);
553 } else {
554 if (host->force_pio || !host->chan_tx)
555 tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP);
556 else
557 tasklet_schedule(&host->dma_issue);
558 }
559 } else {
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200560 schedule_work(&host->done);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100561 }
562
563out:
564 spin_unlock(&host->lock);
565}
566
Simon Horman7729c7a2011-08-25 10:27:26 +0900567static void tmio_mmc_card_irq_status(struct tmio_mmc_host *host,
568 int *ireg, int *status)
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100569{
Simon Horman7729c7a2011-08-25 10:27:26 +0900570 *status = sd_ctrl_read32(host, CTL_STATUS);
571 *ireg = *status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask;
572
573 pr_debug_status(*status);
574 pr_debug_status(*ireg);
575}
576
577static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host,
578 int ireg, int status)
579{
Guennadi Liakhovetski71d111c2011-07-14 12:16:59 +0200580 struct mmc_host *mmc = host->mmc;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100581
Paul Parsonse312eb12011-05-15 13:24:41 +0000582 /* Card insert / remove attempts */
583 if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) {
584 tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT |
585 TMIO_STAT_CARD_REMOVE);
Guennadi Liakhovetski71d111c2011-07-14 12:16:59 +0200586 if ((((ireg & TMIO_STAT_CARD_REMOVE) && mmc->card) ||
587 ((ireg & TMIO_STAT_CARD_INSERT) && !mmc->card)) &&
588 !work_pending(&mmc->detect.work))
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200589 mmc_detect_change(host->mmc, msecs_to_jiffies(100));
Simon Horman7729c7a2011-08-25 10:27:26 +0900590 return true;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100591 }
592
Simon Horman7729c7a2011-08-25 10:27:26 +0900593 return false;
594}
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100595
Simon Horman7729c7a2011-08-25 10:27:26 +0900596irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid)
597{
598 unsigned int ireg, status;
599 struct tmio_mmc_host *host = devid;
600
601 tmio_mmc_card_irq_status(host, &ireg, &status);
602 __tmio_mmc_card_detect_irq(host, ireg, status);
603
604 return IRQ_HANDLED;
605}
606EXPORT_SYMBOL(tmio_mmc_card_detect_irq);
607
608static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host,
609 int ireg, int status)
610{
Paul Parsonse312eb12011-05-15 13:24:41 +0000611 /* Command completion */
612 if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) {
613 tmio_mmc_ack_mmc_irqs(host,
614 TMIO_STAT_CMDRESPEND |
615 TMIO_STAT_CMDTIMEOUT);
616 tmio_mmc_cmd_irq(host, status);
Simon Horman7729c7a2011-08-25 10:27:26 +0900617 return true;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100618 }
Paul Parsonse312eb12011-05-15 13:24:41 +0000619
620 /* Data transfer */
621 if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) {
622 tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ);
623 tmio_mmc_pio_irq(host);
Simon Horman7729c7a2011-08-25 10:27:26 +0900624 return true;
Paul Parsonse312eb12011-05-15 13:24:41 +0000625 }
626
627 /* Data transfer completion */
628 if (ireg & TMIO_STAT_DATAEND) {
629 tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND);
630 tmio_mmc_data_irq(host);
Simon Horman7729c7a2011-08-25 10:27:26 +0900631 return true;
Paul Parsonse312eb12011-05-15 13:24:41 +0000632 }
633
Simon Horman7729c7a2011-08-25 10:27:26 +0900634 return false;
635}
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100636
Simon Horman7729c7a2011-08-25 10:27:26 +0900637irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid)
638{
639 unsigned int ireg, status;
640 struct tmio_mmc_host *host = devid;
641
642 tmio_mmc_card_irq_status(host, &ireg, &status);
643 __tmio_mmc_sdcard_irq(host, ireg, status);
644
645 return IRQ_HANDLED;
646}
647EXPORT_SYMBOL(tmio_mmc_sdcard_irq);
648
649irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid)
650{
651 struct tmio_mmc_host *host = devid;
652 struct mmc_host *mmc = host->mmc;
653 struct tmio_mmc_data *pdata = host->pdata;
654 unsigned int ireg, status;
655
656 if (!(pdata->flags & TMIO_MMC_SDIO_IRQ))
657 return IRQ_HANDLED;
658
659 status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
660 ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask;
661
662 sd_ctrl_write16(host, CTL_SDIO_STATUS, status & ~TMIO_SDIO_MASK_ALL);
663
664 if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ)
665 mmc_signal_sdio_irq(mmc);
666
667 return IRQ_HANDLED;
668}
669EXPORT_SYMBOL(tmio_mmc_sdio_irq);
670
671irqreturn_t tmio_mmc_irq(int irq, void *devid)
672{
673 struct tmio_mmc_host *host = devid;
674 unsigned int ireg, status;
675
676 pr_debug("MMC IRQ begin\n");
677
678 tmio_mmc_card_irq_status(host, &ireg, &status);
679 if (__tmio_mmc_card_detect_irq(host, ireg, status))
680 return IRQ_HANDLED;
681 if (__tmio_mmc_sdcard_irq(host, ireg, status))
682 return IRQ_HANDLED;
683
684 tmio_mmc_sdio_irq(irq, devid);
685
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100686 return IRQ_HANDLED;
687}
Magnus Damm8e7bfdb2011-05-06 11:02:33 +0000688EXPORT_SYMBOL(tmio_mmc_irq);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100689
690static int tmio_mmc_start_data(struct tmio_mmc_host *host,
691 struct mmc_data *data)
692{
693 struct tmio_mmc_data *pdata = host->pdata;
694
695 pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n",
696 data->blksz, data->blocks);
697
698 /* Some hardware cannot perform 2 byte requests in 4 bit mode */
699 if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) {
700 int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES;
701
702 if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) {
703 pr_err("%s: %d byte block unsupported in 4 bit mode\n",
704 mmc_hostname(host->mmc), data->blksz);
705 return -EINVAL;
706 }
707 }
708
709 tmio_mmc_init_sg(host, data);
710 host->data = data;
711
712 /* Set transfer length / blocksize */
713 sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz);
714 sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks);
715
716 tmio_mmc_start_dma(host, data);
717
718 return 0;
719}
720
721/* Process requests from the MMC layer */
722static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
723{
724 struct tmio_mmc_host *host = mmc_priv(mmc);
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000725 unsigned long flags;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100726 int ret;
727
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000728 spin_lock_irqsave(&host->lock, flags);
729
730 if (host->mrq) {
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100731 pr_debug("request not null\n");
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000732 if (IS_ERR(host->mrq)) {
733 spin_unlock_irqrestore(&host->lock, flags);
734 mrq->cmd->error = -EAGAIN;
735 mmc_request_done(mmc, mrq);
736 return;
737 }
738 }
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100739
740 host->last_req_ts = jiffies;
741 wmb();
742 host->mrq = mrq;
743
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000744 spin_unlock_irqrestore(&host->lock, flags);
745
Ulf Hansson03694832013-10-24 16:42:33 +0200746 pm_runtime_get_sync(mmc_dev(mmc));
747
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100748 if (mrq->data) {
749 ret = tmio_mmc_start_data(host, mrq->data);
750 if (ret)
751 goto fail;
752 }
753
754 ret = tmio_mmc_start_command(host, mrq->cmd);
755 if (!ret) {
756 schedule_delayed_work(&host->delayed_reset_work,
757 msecs_to_jiffies(2000));
758 return;
759 }
760
761fail:
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100762 host->force_pio = false;
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000763 host->mrq = NULL;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100764 mrq->cmd->error = ret;
765 mmc_request_done(mmc, mrq);
Ulf Hansson03694832013-10-24 16:42:33 +0200766
767 pm_runtime_mark_last_busy(mmc_dev(mmc));
768 pm_runtime_put_autosuspend(mmc_dev(mmc));
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100769}
770
Ulf Hanssonae12d252013-10-30 00:16:17 +0100771static int tmio_mmc_clk_update(struct tmio_mmc_host *host)
Guennadi Liakhovetski8c102a92012-06-20 19:10:31 +0200772{
Ulf Hanssonae12d252013-10-30 00:16:17 +0100773 struct mmc_host *mmc = host->mmc;
Guennadi Liakhovetski8c102a92012-06-20 19:10:31 +0200774 struct tmio_mmc_data *pdata = host->pdata;
775 int ret;
776
777 if (!pdata->clk_enable)
778 return -ENOTSUPP;
779
780 ret = pdata->clk_enable(host->pdev, &mmc->f_max);
781 if (!ret)
782 mmc->f_min = mmc->f_max / 512;
783
784 return ret;
785}
786
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100787static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd)
788{
789 struct mmc_host *mmc = host->mmc;
790 int ret = 0;
791
792 /* .set_ios() is returning void, so, no chance to report an error */
793
Chris Ball9d731e72013-09-06 07:29:05 -0400794 if (host->set_pwr)
795 host->set_pwr(host->pdev, 1);
796
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100797 if (!IS_ERR(mmc->supply.vmmc)) {
798 ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
799 /*
800 * Attention: empiric value. With a b43 WiFi SDIO card this
801 * delay proved necessary for reliable card-insertion probing.
802 * 100us were not enough. Is this the same 140us delay, as in
803 * tmio_mmc_set_ios()?
804 */
805 udelay(200);
806 }
807 /*
808 * It seems, VccQ should be switched on after Vcc, this is also what the
809 * omap_hsmmc.c driver does.
810 */
811 if (!IS_ERR(mmc->supply.vqmmc) && !ret) {
Guennadi Liakhovetski6d1d6b42013-07-08 11:38:09 +0200812 ret = regulator_enable(mmc->supply.vqmmc);
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100813 udelay(200);
814 }
Guennadi Liakhovetski6d1d6b42013-07-08 11:38:09 +0200815
816 if (ret < 0)
817 dev_dbg(&host->pdev->dev, "Regulators failed to power up: %d\n",
818 ret);
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100819}
820
821static void tmio_mmc_power_off(struct tmio_mmc_host *host)
Guennadi Liakhovetskib958a672012-06-20 19:10:33 +0200822{
823 struct mmc_host *mmc = host->mmc;
824
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100825 if (!IS_ERR(mmc->supply.vqmmc))
826 regulator_disable(mmc->supply.vqmmc);
827
Guennadi Liakhovetskib958a672012-06-20 19:10:33 +0200828 if (!IS_ERR(mmc->supply.vmmc))
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100829 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
Chris Ball9d731e72013-09-06 07:29:05 -0400830
831 if (host->set_pwr)
832 host->set_pwr(host->pdev, 0);
Guennadi Liakhovetskib958a672012-06-20 19:10:33 +0200833}
834
Ulf Hansson9ae4ed72013-10-24 17:42:53 +0200835static void tmio_mmc_set_bus_width(struct tmio_mmc_host *host,
836 unsigned char bus_width)
837{
838 switch (bus_width) {
839 case MMC_BUS_WIDTH_1:
840 sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0);
841 break;
842 case MMC_BUS_WIDTH_4:
843 sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0);
844 break;
845 }
846}
847
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100848/* Set MMC clock / power.
849 * Note: This controller uses a simple divider scheme therefore it cannot
850 * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as
851 * MMC wont run that fast, it has to be clocked at 12MHz which is the next
852 * slowest setting.
853 */
854static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
855{
856 struct tmio_mmc_host *host = mmc_priv(mmc);
Guennadi Liakhovetski4932bd62012-02-09 22:57:16 +0100857 struct device *dev = &host->pdev->dev;
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000858 unsigned long flags;
859
Ulf Hansson03694832013-10-24 16:42:33 +0200860 pm_runtime_get_sync(mmc_dev(mmc));
861
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200862 mutex_lock(&host->ios_lock);
863
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000864 spin_lock_irqsave(&host->lock, flags);
865 if (host->mrq) {
866 if (IS_ERR(host->mrq)) {
Guennadi Liakhovetski4932bd62012-02-09 22:57:16 +0100867 dev_dbg(dev,
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000868 "%s.%d: concurrent .set_ios(), clk %u, mode %u\n",
869 current->comm, task_pid_nr(current),
870 ios->clock, ios->power_mode);
871 host->mrq = ERR_PTR(-EINTR);
872 } else {
Guennadi Liakhovetski4932bd62012-02-09 22:57:16 +0100873 dev_dbg(dev,
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000874 "%s.%d: CMD%u active since %lu, now %lu!\n",
875 current->comm, task_pid_nr(current),
876 host->mrq->cmd->opcode, host->last_req_ts, jiffies);
877 }
878 spin_unlock_irqrestore(&host->lock, flags);
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200879
880 mutex_unlock(&host->ios_lock);
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000881 return;
882 }
883
884 host->mrq = ERR_PTR(-EBUSY);
885
886 spin_unlock_irqrestore(&host->lock, flags);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100887
Ulf Hansson3b292bb2013-10-24 17:53:15 +0200888 switch (ios->power_mode) {
889 case MMC_POWER_OFF:
890 tmio_mmc_power_off(host);
891 tmio_mmc_clk_stop(host);
892 break;
893 case MMC_POWER_UP:
Guennadi Liakhovetski71d111c2011-07-14 12:16:59 +0200894 tmio_mmc_set_clock(host, ios->clock);
Ulf Hansson3b292bb2013-10-24 17:53:15 +0200895 tmio_mmc_power_on(host, ios->vdd);
Guennadi Liakhovetski5fd01572011-03-09 14:45:44 +0100896 tmio_mmc_clk_start(host);
Ulf Hansson9ae4ed72013-10-24 17:42:53 +0200897 tmio_mmc_set_bus_width(host, ios->bus_width);
Ulf Hansson3b292bb2013-10-24 17:53:15 +0200898 break;
899 case MMC_POWER_ON:
900 tmio_mmc_set_clock(host, ios->clock);
901 tmio_mmc_clk_start(host);
902 tmio_mmc_set_bus_width(host, ios->bus_width);
903 break;
904 }
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100905
906 /* Let things settle. delay taken from winCE driver */
907 udelay(140);
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000908 if (PTR_ERR(host->mrq) == -EINTR)
909 dev_dbg(&host->pdev->dev,
910 "%s.%d: IOS interrupted: clk %u, mode %u",
911 current->comm, task_pid_nr(current),
912 ios->clock, ios->power_mode);
913 host->mrq = NULL;
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200914
Ulf Hanssonae12d252013-10-30 00:16:17 +0100915 host->clk_cache = ios->clock;
916
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200917 mutex_unlock(&host->ios_lock);
Ulf Hansson03694832013-10-24 16:42:33 +0200918
919 pm_runtime_mark_last_busy(mmc_dev(mmc));
920 pm_runtime_put_autosuspend(mmc_dev(mmc));
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100921}
922
923static int tmio_mmc_get_ro(struct mmc_host *mmc)
924{
925 struct tmio_mmc_host *host = mmc_priv(mmc);
926 struct tmio_mmc_data *pdata = host->pdata;
Guennadi Liakhovetski3071caf2012-05-01 17:11:56 +0200927 int ret = mmc_gpio_get_ro(mmc);
928 if (ret >= 0)
929 return ret;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100930
Ulf Hansson03694832013-10-24 16:42:33 +0200931 pm_runtime_get_sync(mmc_dev(mmc));
932 ret = !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) ||
933 (sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT));
934 pm_runtime_mark_last_busy(mmc_dev(mmc));
935 pm_runtime_put_autosuspend(mmc_dev(mmc));
936
937 return ret;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100938}
939
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100940static const struct mmc_host_ops tmio_mmc_ops = {
941 .request = tmio_mmc_request,
942 .set_ios = tmio_mmc_set_ios,
943 .get_ro = tmio_mmc_get_ro,
Laurent Pinchart2b63b342013-08-08 12:38:43 +0200944 .get_cd = mmc_gpio_get_cd,
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100945 .enable_sdio_irq = tmio_mmc_enable_sdio_irq,
946};
947
Kuninori Morimoto05fae4a2013-11-20 00:30:39 -0800948static int tmio_mmc_init_ocr(struct tmio_mmc_host *host)
Guennadi Liakhovetskib958a672012-06-20 19:10:33 +0200949{
950 struct tmio_mmc_data *pdata = host->pdata;
951 struct mmc_host *mmc = host->mmc;
952
953 mmc_regulator_get_supply(mmc);
954
Kuninori Morimoto05fae4a2013-11-20 00:30:39 -0800955 /* use ocr_mask if no regulator */
Guennadi Liakhovetskib958a672012-06-20 19:10:33 +0200956 if (!mmc->ocr_avail)
Kuninori Morimoto05fae4a2013-11-20 00:30:39 -0800957 mmc->ocr_avail = pdata->ocr_mask;
958
959 /*
960 * try again.
961 * There is possibility that regulator has not been probed
962 */
963 if (!mmc->ocr_avail)
964 return -EPROBE_DEFER;
965
966 return 0;
Guennadi Liakhovetskib958a672012-06-20 19:10:33 +0200967}
968
Guennadi Liakhovetski5a00a972013-02-15 16:13:56 +0100969static void tmio_mmc_of_parse(struct platform_device *pdev,
970 struct tmio_mmc_data *pdata)
971{
972 const struct device_node *np = pdev->dev.of_node;
973 if (!np)
974 return;
975
976 if (of_get_property(np, "toshiba,mmc-wrprotect-disable", NULL))
977 pdata->flags |= TMIO_MMC_WRPROTECT_DISABLE;
978}
979
Bill Pembertonc3be1ef2012-11-19 13:23:06 -0500980int tmio_mmc_host_probe(struct tmio_mmc_host **host,
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100981 struct platform_device *pdev,
982 struct tmio_mmc_data *pdata)
983{
984 struct tmio_mmc_host *_host;
985 struct mmc_host *mmc;
986 struct resource *res_ctl;
987 int ret;
988 u32 irq_mask = TMIO_MASK_CMD;
989
Guennadi Liakhovetski5a00a972013-02-15 16:13:56 +0100990 tmio_mmc_of_parse(pdev, pdata);
991
Guennadi Liakhovetski7b952132013-02-15 16:13:50 +0100992 if (!(pdata->flags & TMIO_MMC_HAS_IDLE_WAIT))
993 pdata->write16_hook = NULL;
994
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100995 res_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 0);
996 if (!res_ctl)
997 return -EINVAL;
998
999 mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev);
1000 if (!mmc)
1001 return -ENOMEM;
1002
Simon Baatz274a7522013-06-09 22:14:13 +02001003 ret = mmc_of_parse(mmc);
1004 if (ret < 0)
1005 goto host_free;
Guennadi Liakhovetski5a00a972013-02-15 16:13:56 +01001006
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001007 pdata->dev = &pdev->dev;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001008 _host = mmc_priv(mmc);
1009 _host->pdata = pdata;
1010 _host->mmc = mmc;
1011 _host->pdev = pdev;
1012 platform_set_drvdata(pdev, mmc);
1013
Chris Ball9d731e72013-09-06 07:29:05 -04001014 _host->set_pwr = pdata->set_pwr;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001015 _host->set_clk_div = pdata->set_clk_div;
1016
Kuninori Morimoto05fae4a2013-11-20 00:30:39 -08001017 ret = tmio_mmc_init_ocr(_host);
1018 if (ret < 0)
1019 goto host_free;
1020
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001021 _host->ctl = ioremap(res_ctl->start, resource_size(res_ctl));
1022 if (!_host->ctl) {
1023 ret = -ENOMEM;
1024 goto host_free;
1025 }
1026
1027 mmc->ops = &tmio_mmc_ops;
Guennadi Liakhovetski5a00a972013-02-15 16:13:56 +01001028 mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities;
Kuninori Morimotodd006b32013-11-20 00:16:14 -08001029 mmc->caps2 |= pdata->capabilities2;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001030 mmc->max_segs = 32;
1031 mmc->max_blk_size = 512;
1032 mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size) *
1033 mmc->max_segs;
1034 mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
1035 mmc->max_seg_size = mmc->max_req_size;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001036
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001037 _host->native_hotplug = !(pdata->flags & TMIO_MMC_USE_GPIO_CD ||
Guennadi Liakhovetski2b1ac5c2012-02-09 22:57:08 +01001038 mmc->caps & MMC_CAP_NEEDS_POLL ||
Guennadi Liakhovetski5a00a972013-02-15 16:13:56 +01001039 mmc->caps & MMC_CAP_NONREMOVABLE ||
1040 mmc->slot.cd_irq >= 0);
Guennadi Liakhovetski2b1ac5c2012-02-09 22:57:08 +01001041
Ulf Hanssonae12d252013-10-30 00:16:17 +01001042 if (tmio_mmc_clk_update(_host) < 0) {
Guennadi Liakhovetski8c102a92012-06-20 19:10:31 +02001043 mmc->f_max = pdata->hclk;
1044 mmc->f_min = mmc->f_max / 512;
1045 }
1046
Bastian Hechtcbb18b32011-12-23 23:03:13 +01001047 /*
Ulf Hansson03694832013-10-24 16:42:33 +02001048 * While using internal tmio hardware logic for card detection, we need
1049 * to ensure it stays powered for it to work.
Bastian Hechtcbb18b32011-12-23 23:03:13 +01001050 */
Guennadi Liakhovetski2b1ac5c2012-02-09 22:57:08 +01001051 if (_host->native_hotplug)
Bastian Hechtcbb18b32011-12-23 23:03:13 +01001052 pm_runtime_get_noresume(&pdev->dev);
1053
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001054 tmio_mmc_clk_stop(_host);
1055 tmio_mmc_reset(_host);
1056
Simon Horman54680fe2011-08-25 10:27:25 +09001057 _host->sdcard_irq_mask = sd_ctrl_read32(_host, CTL_IRQ_MASK);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001058 tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL);
Guennadi Liakhovetskie0337cc2012-06-20 19:10:30 +02001059
1060 /* Unmask the IRQs we want to know about */
1061 if (!_host->chan_rx)
1062 irq_mask |= TMIO_MASK_READOP;
1063 if (!_host->chan_tx)
1064 irq_mask |= TMIO_MASK_WRITEOP;
1065 if (!_host->native_hotplug)
1066 irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
1067
1068 _host->sdcard_irq_mask &= ~irq_mask;
1069
Ulf Hansson7501c432013-10-24 15:58:45 +02001070 _host->sdio_irq_enabled = false;
1071 if (pdata->flags & TMIO_MMC_SDIO_IRQ) {
1072 _host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
1073 sd_ctrl_write16(_host, CTL_SDIO_IRQ_MASK, _host->sdio_irq_mask);
1074 sd_ctrl_write16(_host, CTL_TRANSACTION_CTL, 0x0000);
1075 }
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001076
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001077 spin_lock_init(&_host->lock);
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +02001078 mutex_init(&_host->ios_lock);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001079
1080 /* Init delayed work for request timeouts */
1081 INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work);
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +02001082 INIT_WORK(&_host->done, tmio_mmc_done_work);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001083
1084 /* See if we also get DMA */
1085 tmio_mmc_request_dma(_host, pdata);
1086
Ulf Hansson03694832013-10-24 16:42:33 +02001087 pm_runtime_set_active(&pdev->dev);
1088 pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
1089 pm_runtime_use_autosuspend(&pdev->dev);
1090 pm_runtime_enable(&pdev->dev);
1091
Guennadi Liakhovetski8c102a92012-06-20 19:10:31 +02001092 ret = mmc_add_host(mmc);
Guennadi Liakhovetski8c102a92012-06-20 19:10:31 +02001093 if (ret < 0) {
1094 tmio_mmc_host_remove(_host);
1095 return ret;
1096 }
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001097
Rafael J. Wysockic419e612012-03-13 01:01:51 +01001098 dev_pm_qos_expose_latency_limit(&pdev->dev, 100);
1099
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001100 if (pdata->flags & TMIO_MMC_USE_GPIO_CD) {
Laurent Pinchart214fc302013-08-08 12:38:31 +02001101 ret = mmc_gpio_request_cd(mmc, pdata->cd_gpio, 0);
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001102 if (ret < 0) {
1103 tmio_mmc_host_remove(_host);
1104 return ret;
1105 }
1106 }
1107
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001108 *host = _host;
1109
1110 return 0;
1111
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001112host_free:
1113 mmc_free_host(mmc);
1114
1115 return ret;
1116}
1117EXPORT_SYMBOL(tmio_mmc_host_probe);
1118
1119void tmio_mmc_host_remove(struct tmio_mmc_host *host)
1120{
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001121 struct platform_device *pdev = host->pdev;
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001122 struct mmc_host *mmc = host->mmc;
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001123
Guennadi Liakhovetski2b1ac5c2012-02-09 22:57:08 +01001124 if (!host->native_hotplug)
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001125 pm_runtime_get_sync(&pdev->dev);
1126
Rafael J. Wysockic419e612012-03-13 01:01:51 +01001127 dev_pm_qos_hide_latency_limit(&pdev->dev);
1128
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001129 mmc_remove_host(mmc);
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +02001130 cancel_work_sync(&host->done);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001131 cancel_delayed_work_sync(&host->delayed_reset_work);
1132 tmio_mmc_release_dma(host);
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001133
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001134 pm_runtime_put_sync(&pdev->dev);
1135 pm_runtime_disable(&pdev->dev);
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001136
1137 iounmap(host->ctl);
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001138 mmc_free_host(mmc);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001139}
1140EXPORT_SYMBOL(tmio_mmc_host_remove);
1141
Ulf Hansson710dec92013-10-23 14:55:07 +02001142#ifdef CONFIG_PM_SLEEP
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001143int tmio_mmc_host_suspend(struct device *dev)
1144{
1145 struct mmc_host *mmc = dev_get_drvdata(dev);
1146 struct tmio_mmc_host *host = mmc_priv(mmc);
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001147
Ulf Hanssond62c9572013-09-26 10:36:06 +02001148 tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL);
1149 return 0;
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001150}
1151EXPORT_SYMBOL(tmio_mmc_host_suspend);
1152
1153int tmio_mmc_host_resume(struct device *dev)
1154{
1155 struct mmc_host *mmc = dev_get_drvdata(dev);
1156 struct tmio_mmc_host *host = mmc_priv(mmc);
1157
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001158 tmio_mmc_enable_dma(host, true);
1159
Ulf Hanssond62c9572013-09-26 10:36:06 +02001160 return 0;
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001161}
1162EXPORT_SYMBOL(tmio_mmc_host_resume);
Ulf Hansson710dec92013-10-23 14:55:07 +02001163#endif
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001164
Ulf Hansson710dec92013-10-23 14:55:07 +02001165#ifdef CONFIG_PM_RUNTIME
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001166int tmio_mmc_host_runtime_suspend(struct device *dev)
1167{
Ulf Hanssonae12d252013-10-30 00:16:17 +01001168 struct mmc_host *mmc = dev_get_drvdata(dev);
1169 struct tmio_mmc_host *host = mmc_priv(mmc);
1170
1171 if (host->clk_cache)
1172 tmio_mmc_clk_stop(host);
1173
1174 if (host->pdata->clk_disable)
1175 host->pdata->clk_disable(host->pdev);
1176
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001177 return 0;
1178}
1179EXPORT_SYMBOL(tmio_mmc_host_runtime_suspend);
1180
1181int tmio_mmc_host_runtime_resume(struct device *dev)
1182{
1183 struct mmc_host *mmc = dev_get_drvdata(dev);
1184 struct tmio_mmc_host *host = mmc_priv(mmc);
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001185
Ulf Hanssonae12d252013-10-30 00:16:17 +01001186 tmio_mmc_reset(host);
1187 tmio_mmc_clk_update(host);
1188
1189 if (host->clk_cache) {
1190 tmio_mmc_set_clock(host, host->clk_cache);
1191 tmio_mmc_clk_start(host);
1192 }
1193
Guennadi Liakhovetski162f43e2011-07-14 18:39:10 +02001194 tmio_mmc_enable_dma(host, true);
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001195
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001196 return 0;
1197}
1198EXPORT_SYMBOL(tmio_mmc_host_runtime_resume);
Ulf Hansson710dec92013-10-23 14:55:07 +02001199#endif
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001200
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001201MODULE_LICENSE("GPL v2");