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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
132 if (enable) {
Simon Horman54680fe2011-08-25 10:27:25 +0900133 host->sdio_irq_mask = TMIO_SDIO_MASK_ALL &
134 ~TMIO_SDIO_STAT_IOIRQ;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100135 sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001);
Simon Horman54680fe2011-08-25 10:27:25 +0900136 sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100137 } else {
Simon Horman54680fe2011-08-25 10:27:25 +0900138 host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
139 sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100140 sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100141 }
142}
143
144static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock)
145{
146 u32 clk = 0, clock;
147
148 if (new_clock) {
149 for (clock = host->mmc->f_min, clk = 0x80000080;
150 new_clock >= (clock<<1); clk >>= 1)
151 clock <<= 1;
152 clk |= 0x100;
153 }
154
155 if (host->set_clk_div)
156 host->set_clk_div(host->pdev, (clk>>22) & 1);
157
158 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & 0x1ff);
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100159 msleep(10);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100160}
161
162static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
163{
Guennadi Liakhovetski69d1fe12011-03-09 17:28:55 +0100164 struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100165
Guennadi Liakhovetski69d1fe12011-03-09 17:28:55 +0100166 /* implicit BUG_ON(!res) */
167 if (resource_size(res) > 0x100) {
168 sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000);
169 msleep(10);
170 }
Guennadi Liakhovetskid9b03422011-03-10 18:43:07 +0100171
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100172 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~0x0100 &
173 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
174 msleep(10);
175}
176
177static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
178{
Guennadi Liakhovetski69d1fe12011-03-09 17:28:55 +0100179 struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100180
181 sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, 0x0100 |
182 sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
183 msleep(10);
Guennadi Liakhovetskid9b03422011-03-10 18:43:07 +0100184
Guennadi Liakhovetski69d1fe12011-03-09 17:28:55 +0100185 /* implicit BUG_ON(!res) */
186 if (resource_size(res) > 0x100) {
187 sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
188 msleep(10);
189 }
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100190}
191
192static void tmio_mmc_reset(struct tmio_mmc_host *host)
193{
Guennadi Liakhovetski69d1fe12011-03-09 17:28:55 +0100194 struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0);
195
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100196 /* FIXME - should we set stop clock reg here */
197 sd_ctrl_write16(host, CTL_RESET_SD, 0x0000);
Guennadi Liakhovetski69d1fe12011-03-09 17:28:55 +0100198 /* implicit BUG_ON(!res) */
199 if (resource_size(res) > 0x100)
200 sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100201 msleep(10);
202 sd_ctrl_write16(host, CTL_RESET_SD, 0x0001);
Guennadi Liakhovetski69d1fe12011-03-09 17:28:55 +0100203 if (resource_size(res) > 0x100)
204 sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100205 msleep(10);
206}
207
208static void tmio_mmc_reset_work(struct work_struct *work)
209{
210 struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
211 delayed_reset_work.work);
212 struct mmc_request *mrq;
213 unsigned long flags;
214
215 spin_lock_irqsave(&host->lock, flags);
216 mrq = host->mrq;
217
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000218 /*
219 * is request already finished? Since we use a non-blocking
220 * cancel_delayed_work(), it can happen, that a .set_ios() call preempts
221 * us, so, have to check for IS_ERR(host->mrq)
222 */
223 if (IS_ERR_OR_NULL(mrq)
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100224 || time_is_after_jiffies(host->last_req_ts +
225 msecs_to_jiffies(2000))) {
226 spin_unlock_irqrestore(&host->lock, flags);
227 return;
228 }
229
230 dev_warn(&host->pdev->dev,
231 "timeout waiting for hardware interrupt (CMD%u)\n",
232 mrq->cmd->opcode);
233
234 if (host->data)
235 host->data->error = -ETIMEDOUT;
236 else if (host->cmd)
237 host->cmd->error = -ETIMEDOUT;
238 else
239 mrq->cmd->error = -ETIMEDOUT;
240
241 host->cmd = NULL;
242 host->data = NULL;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100243 host->force_pio = false;
244
245 spin_unlock_irqrestore(&host->lock, flags);
246
247 tmio_mmc_reset(host);
248
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000249 /* Ready for new calls */
250 host->mrq = NULL;
251
Guennadi Liakhovetskie3de2be2012-01-06 13:06:51 +0100252 tmio_mmc_abort_dma(host);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100253 mmc_request_done(host->mmc, mrq);
254}
255
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000256/* called with host->lock held, interrupts disabled */
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100257static void tmio_mmc_finish_request(struct tmio_mmc_host *host)
258{
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200259 struct mmc_request *mrq;
260 unsigned long flags;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100261
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200262 spin_lock_irqsave(&host->lock, flags);
263
264 mrq = host->mrq;
265 if (IS_ERR_OR_NULL(mrq)) {
266 spin_unlock_irqrestore(&host->lock, flags);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100267 return;
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200268 }
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100269
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100270 host->cmd = NULL;
271 host->data = NULL;
272 host->force_pio = false;
273
274 cancel_delayed_work(&host->delayed_reset_work);
275
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000276 host->mrq = NULL;
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200277 spin_unlock_irqrestore(&host->lock, flags);
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000278
Guennadi Liakhovetskie3de2be2012-01-06 13:06:51 +0100279 if (mrq->cmd->error || (mrq->data && mrq->data->error))
280 tmio_mmc_abort_dma(host);
281
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100282 mmc_request_done(host->mmc, mrq);
283}
284
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200285static void tmio_mmc_done_work(struct work_struct *work)
286{
287 struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
288 done);
289 tmio_mmc_finish_request(host);
290}
291
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100292/* These are the bitmasks the tmio chip requires to implement the MMC response
293 * types. Note that R1 and R6 are the same in this scheme. */
294#define APP_CMD 0x0040
295#define RESP_NONE 0x0300
296#define RESP_R1 0x0400
297#define RESP_R1B 0x0500
298#define RESP_R2 0x0600
299#define RESP_R3 0x0700
300#define DATA_PRESENT 0x0800
301#define TRANSFER_READ 0x1000
302#define TRANSFER_MULTI 0x2000
303#define SECURITY_CMD 0x4000
304
305static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd)
306{
307 struct mmc_data *data = host->data;
308 int c = cmd->opcode;
Guennadi Liakhovetskie23cd532012-02-22 13:16:09 +0100309 u32 irq_mask = TMIO_MASK_CMD;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100310
Guennadi Liakhovetski0f506a92012-06-20 19:10:35 +0200311 /* CMD12 is handled by hardware */
312 if (cmd->opcode == MMC_STOP_TRANSMISSION && !cmd->arg) {
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100313 sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x001);
314 return 0;
315 }
316
317 switch (mmc_resp_type(cmd)) {
318 case MMC_RSP_NONE: c |= RESP_NONE; break;
319 case MMC_RSP_R1: c |= RESP_R1; break;
320 case MMC_RSP_R1B: c |= RESP_R1B; break;
321 case MMC_RSP_R2: c |= RESP_R2; break;
322 case MMC_RSP_R3: c |= RESP_R3; break;
323 default:
324 pr_debug("Unknown response type %d\n", mmc_resp_type(cmd));
325 return -EINVAL;
326 }
327
328 host->cmd = cmd;
329
330/* FIXME - this seems to be ok commented out but the spec suggest this bit
331 * should be set when issuing app commands.
332 * if(cmd->flags & MMC_FLAG_ACMD)
333 * c |= APP_CMD;
334 */
335 if (data) {
336 c |= DATA_PRESENT;
337 if (data->blocks > 1) {
338 sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x100);
339 c |= TRANSFER_MULTI;
340 }
341 if (data->flags & MMC_DATA_READ)
342 c |= TRANSFER_READ;
343 }
344
Guennadi Liakhovetskie23cd532012-02-22 13:16:09 +0100345 if (!host->native_hotplug)
346 irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
347 tmio_mmc_enable_mmc_irqs(host, irq_mask);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100348
349 /* Fire off the command */
350 sd_ctrl_write32(host, CTL_ARG_REG, cmd->arg);
351 sd_ctrl_write16(host, CTL_SD_CMD, c);
352
353 return 0;
354}
355
356/*
357 * This chip always returns (at least?) as much data as you ask for.
358 * I'm unsure what happens if you ask for less than a block. This should be
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300359 * looked into to ensure that a funny length read doesn't hose the controller.
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100360 */
361static void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
362{
363 struct mmc_data *data = host->data;
364 void *sg_virt;
365 unsigned short *buf;
366 unsigned int count;
367 unsigned long flags;
368
369 if ((host->chan_tx || host->chan_rx) && !host->force_pio) {
370 pr_err("PIO IRQ in DMA mode!\n");
371 return;
372 } else if (!data) {
373 pr_debug("Spurious PIO IRQ\n");
374 return;
375 }
376
377 sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags);
378 buf = (unsigned short *)(sg_virt + host->sg_off);
379
380 count = host->sg_ptr->length - host->sg_off;
381 if (count > data->blksz)
382 count = data->blksz;
383
384 pr_debug("count: %08x offset: %08x flags %08x\n",
385 count, host->sg_off, data->flags);
386
387 /* Transfer the data */
388 if (data->flags & MMC_DATA_READ)
389 sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
390 else
391 sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
392
393 host->sg_off += count;
394
395 tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt);
396
397 if (host->sg_off == host->sg_ptr->length)
398 tmio_mmc_next_sg(host);
399
400 return;
401}
402
403static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host *host)
404{
405 if (host->sg_ptr == &host->bounce_sg) {
406 unsigned long flags;
407 void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags);
408 memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length);
409 tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr);
410 }
411}
412
413/* needs to be called with host->lock held */
414void tmio_mmc_do_data_irq(struct tmio_mmc_host *host)
415{
416 struct mmc_data *data = host->data;
417 struct mmc_command *stop;
418
419 host->data = NULL;
420
421 if (!data) {
422 dev_warn(&host->pdev->dev, "Spurious data end IRQ\n");
423 return;
424 }
425 stop = data->stop;
426
427 /* FIXME - return correct transfer count on errors */
428 if (!data->error)
429 data->bytes_xfered = data->blocks * data->blksz;
430 else
431 data->bytes_xfered = 0;
432
433 pr_debug("Completed data request\n");
434
435 /*
436 * FIXME: other drivers allow an optional stop command of any given type
437 * which we dont do, as the chip can auto generate them.
438 * Perhaps we can be smarter about when to use auto CMD12 and
439 * only issue the auto request when we know this is the desired
440 * stop command, allowing fallback to the stop command the
441 * upper layers expect. For now, we do what works.
442 */
443
444 if (data->flags & MMC_DATA_READ) {
445 if (host->chan_rx && !host->force_pio)
446 tmio_mmc_check_bounce_buffer(host);
447 dev_dbg(&host->pdev->dev, "Complete Rx request %p\n",
448 host->mrq);
449 } else {
450 dev_dbg(&host->pdev->dev, "Complete Tx request %p\n",
451 host->mrq);
452 }
453
454 if (stop) {
Guennadi Liakhovetski0f506a92012-06-20 19:10:35 +0200455 if (stop->opcode == MMC_STOP_TRANSMISSION && !stop->arg)
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100456 sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x000);
457 else
458 BUG();
459 }
460
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200461 schedule_work(&host->done);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100462}
463
464static void tmio_mmc_data_irq(struct tmio_mmc_host *host)
465{
466 struct mmc_data *data;
467 spin_lock(&host->lock);
468 data = host->data;
469
470 if (!data)
471 goto out;
472
473 if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) {
474 /*
475 * Has all data been written out yet? Testing on SuperH showed,
476 * that in most cases the first interrupt comes already with the
477 * BUSY status bit clear, but on some operations, like mount or
478 * in the beginning of a write / sync / umount, there is one
479 * DATAEND interrupt with the BUSY bit set, in this cases
480 * waiting for one more interrupt fixes the problem.
481 */
482 if (!(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_CMD_BUSY)) {
483 tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
484 tasklet_schedule(&host->dma_complete);
485 }
486 } else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) {
487 tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
488 tasklet_schedule(&host->dma_complete);
489 } else {
490 tmio_mmc_do_data_irq(host);
491 tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP);
492 }
493out:
494 spin_unlock(&host->lock);
495}
496
497static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
498 unsigned int stat)
499{
500 struct mmc_command *cmd = host->cmd;
501 int i, addr;
502
503 spin_lock(&host->lock);
504
505 if (!host->cmd) {
506 pr_debug("Spurious CMD irq\n");
507 goto out;
508 }
509
510 host->cmd = NULL;
511
512 /* This controller is sicker than the PXA one. Not only do we need to
513 * drop the top 8 bits of the first response word, we also need to
514 * modify the order of the response for short response command types.
515 */
516
517 for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4)
518 cmd->resp[i] = sd_ctrl_read32(host, addr);
519
520 if (cmd->flags & MMC_RSP_136) {
521 cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24);
522 cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24);
523 cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24);
524 cmd->resp[3] <<= 8;
525 } else if (cmd->flags & MMC_RSP_R3) {
526 cmd->resp[0] = cmd->resp[3];
527 }
528
529 if (stat & TMIO_STAT_CMDTIMEOUT)
530 cmd->error = -ETIMEDOUT;
531 else if (stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC)
532 cmd->error = -EILSEQ;
533
534 /* If there is data to handle we enable data IRQs here, and
535 * we will ultimatley finish the request in the data_end handler.
536 * If theres no data or we encountered an error, finish now.
537 */
538 if (host->data && !cmd->error) {
539 if (host->data->flags & MMC_DATA_READ) {
540 if (host->force_pio || !host->chan_rx)
541 tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP);
542 else
543 tasklet_schedule(&host->dma_issue);
544 } else {
545 if (host->force_pio || !host->chan_tx)
546 tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP);
547 else
548 tasklet_schedule(&host->dma_issue);
549 }
550 } else {
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200551 schedule_work(&host->done);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100552 }
553
554out:
555 spin_unlock(&host->lock);
556}
557
Simon Horman7729c7a2011-08-25 10:27:26 +0900558static void tmio_mmc_card_irq_status(struct tmio_mmc_host *host,
559 int *ireg, int *status)
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100560{
Simon Horman7729c7a2011-08-25 10:27:26 +0900561 *status = sd_ctrl_read32(host, CTL_STATUS);
562 *ireg = *status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask;
563
564 pr_debug_status(*status);
565 pr_debug_status(*ireg);
566}
567
568static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host,
569 int ireg, int status)
570{
Guennadi Liakhovetski71d111c2011-07-14 12:16:59 +0200571 struct mmc_host *mmc = host->mmc;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100572
Paul Parsonse312eb12011-05-15 13:24:41 +0000573 /* Card insert / remove attempts */
574 if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) {
575 tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT |
576 TMIO_STAT_CARD_REMOVE);
Guennadi Liakhovetski71d111c2011-07-14 12:16:59 +0200577 if ((((ireg & TMIO_STAT_CARD_REMOVE) && mmc->card) ||
578 ((ireg & TMIO_STAT_CARD_INSERT) && !mmc->card)) &&
579 !work_pending(&mmc->detect.work))
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200580 mmc_detect_change(host->mmc, msecs_to_jiffies(100));
Simon Horman7729c7a2011-08-25 10:27:26 +0900581 return true;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100582 }
583
Simon Horman7729c7a2011-08-25 10:27:26 +0900584 return false;
585}
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100586
Simon Horman7729c7a2011-08-25 10:27:26 +0900587irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid)
588{
589 unsigned int ireg, status;
590 struct tmio_mmc_host *host = devid;
591
592 tmio_mmc_card_irq_status(host, &ireg, &status);
593 __tmio_mmc_card_detect_irq(host, ireg, status);
594
595 return IRQ_HANDLED;
596}
597EXPORT_SYMBOL(tmio_mmc_card_detect_irq);
598
599static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host,
600 int ireg, int status)
601{
Paul Parsonse312eb12011-05-15 13:24:41 +0000602 /* Command completion */
603 if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) {
604 tmio_mmc_ack_mmc_irqs(host,
605 TMIO_STAT_CMDRESPEND |
606 TMIO_STAT_CMDTIMEOUT);
607 tmio_mmc_cmd_irq(host, status);
Simon Horman7729c7a2011-08-25 10:27:26 +0900608 return true;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100609 }
Paul Parsonse312eb12011-05-15 13:24:41 +0000610
611 /* Data transfer */
612 if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) {
613 tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ);
614 tmio_mmc_pio_irq(host);
Simon Horman7729c7a2011-08-25 10:27:26 +0900615 return true;
Paul Parsonse312eb12011-05-15 13:24:41 +0000616 }
617
618 /* Data transfer completion */
619 if (ireg & TMIO_STAT_DATAEND) {
620 tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND);
621 tmio_mmc_data_irq(host);
Simon Horman7729c7a2011-08-25 10:27:26 +0900622 return true;
Paul Parsonse312eb12011-05-15 13:24:41 +0000623 }
624
Simon Horman7729c7a2011-08-25 10:27:26 +0900625 return false;
626}
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100627
Simon Horman7729c7a2011-08-25 10:27:26 +0900628irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid)
629{
630 unsigned int ireg, status;
631 struct tmio_mmc_host *host = devid;
632
633 tmio_mmc_card_irq_status(host, &ireg, &status);
634 __tmio_mmc_sdcard_irq(host, ireg, status);
635
636 return IRQ_HANDLED;
637}
638EXPORT_SYMBOL(tmio_mmc_sdcard_irq);
639
640irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid)
641{
642 struct tmio_mmc_host *host = devid;
643 struct mmc_host *mmc = host->mmc;
644 struct tmio_mmc_data *pdata = host->pdata;
645 unsigned int ireg, status;
646
647 if (!(pdata->flags & TMIO_MMC_SDIO_IRQ))
648 return IRQ_HANDLED;
649
650 status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
651 ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask;
652
653 sd_ctrl_write16(host, CTL_SDIO_STATUS, status & ~TMIO_SDIO_MASK_ALL);
654
655 if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ)
656 mmc_signal_sdio_irq(mmc);
657
658 return IRQ_HANDLED;
659}
660EXPORT_SYMBOL(tmio_mmc_sdio_irq);
661
662irqreturn_t tmio_mmc_irq(int irq, void *devid)
663{
664 struct tmio_mmc_host *host = devid;
665 unsigned int ireg, status;
666
667 pr_debug("MMC IRQ begin\n");
668
669 tmio_mmc_card_irq_status(host, &ireg, &status);
670 if (__tmio_mmc_card_detect_irq(host, ireg, status))
671 return IRQ_HANDLED;
672 if (__tmio_mmc_sdcard_irq(host, ireg, status))
673 return IRQ_HANDLED;
674
675 tmio_mmc_sdio_irq(irq, devid);
676
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100677 return IRQ_HANDLED;
678}
Magnus Damm8e7bfdb2011-05-06 11:02:33 +0000679EXPORT_SYMBOL(tmio_mmc_irq);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100680
681static int tmio_mmc_start_data(struct tmio_mmc_host *host,
682 struct mmc_data *data)
683{
684 struct tmio_mmc_data *pdata = host->pdata;
685
686 pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n",
687 data->blksz, data->blocks);
688
689 /* Some hardware cannot perform 2 byte requests in 4 bit mode */
690 if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) {
691 int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES;
692
693 if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) {
694 pr_err("%s: %d byte block unsupported in 4 bit mode\n",
695 mmc_hostname(host->mmc), data->blksz);
696 return -EINVAL;
697 }
698 }
699
700 tmio_mmc_init_sg(host, data);
701 host->data = data;
702
703 /* Set transfer length / blocksize */
704 sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz);
705 sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks);
706
707 tmio_mmc_start_dma(host, data);
708
709 return 0;
710}
711
712/* Process requests from the MMC layer */
713static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
714{
715 struct tmio_mmc_host *host = mmc_priv(mmc);
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000716 unsigned long flags;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100717 int ret;
718
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000719 spin_lock_irqsave(&host->lock, flags);
720
721 if (host->mrq) {
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100722 pr_debug("request not null\n");
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000723 if (IS_ERR(host->mrq)) {
724 spin_unlock_irqrestore(&host->lock, flags);
725 mrq->cmd->error = -EAGAIN;
726 mmc_request_done(mmc, mrq);
727 return;
728 }
729 }
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100730
731 host->last_req_ts = jiffies;
732 wmb();
733 host->mrq = mrq;
734
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000735 spin_unlock_irqrestore(&host->lock, flags);
736
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100737 if (mrq->data) {
738 ret = tmio_mmc_start_data(host, mrq->data);
739 if (ret)
740 goto fail;
741 }
742
743 ret = tmio_mmc_start_command(host, mrq->cmd);
744 if (!ret) {
745 schedule_delayed_work(&host->delayed_reset_work,
746 msecs_to_jiffies(2000));
747 return;
748 }
749
750fail:
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100751 host->force_pio = false;
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000752 host->mrq = NULL;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100753 mrq->cmd->error = ret;
754 mmc_request_done(mmc, mrq);
755}
756
Guennadi Liakhovetski8c102a92012-06-20 19:10:31 +0200757static int tmio_mmc_clk_update(struct mmc_host *mmc)
758{
759 struct tmio_mmc_host *host = mmc_priv(mmc);
760 struct tmio_mmc_data *pdata = host->pdata;
761 int ret;
762
763 if (!pdata->clk_enable)
764 return -ENOTSUPP;
765
766 ret = pdata->clk_enable(host->pdev, &mmc->f_max);
767 if (!ret)
768 mmc->f_min = mmc->f_max / 512;
769
770 return ret;
771}
772
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100773static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd)
774{
775 struct mmc_host *mmc = host->mmc;
776 int ret = 0;
777
778 /* .set_ios() is returning void, so, no chance to report an error */
779
780 if (host->set_pwr)
781 host->set_pwr(host->pdev, 1);
782
783 if (!IS_ERR(mmc->supply.vmmc)) {
784 ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
785 /*
786 * Attention: empiric value. With a b43 WiFi SDIO card this
787 * delay proved necessary for reliable card-insertion probing.
788 * 100us were not enough. Is this the same 140us delay, as in
789 * tmio_mmc_set_ios()?
790 */
791 udelay(200);
792 }
793 /*
794 * It seems, VccQ should be switched on after Vcc, this is also what the
795 * omap_hsmmc.c driver does.
796 */
797 if (!IS_ERR(mmc->supply.vqmmc) && !ret) {
Guennadi Liakhovetski6d1d6b42013-07-08 11:38:09 +0200798 ret = regulator_enable(mmc->supply.vqmmc);
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100799 udelay(200);
800 }
Guennadi Liakhovetski6d1d6b42013-07-08 11:38:09 +0200801
802 if (ret < 0)
803 dev_dbg(&host->pdev->dev, "Regulators failed to power up: %d\n",
804 ret);
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100805}
806
807static void tmio_mmc_power_off(struct tmio_mmc_host *host)
Guennadi Liakhovetskib958a672012-06-20 19:10:33 +0200808{
809 struct mmc_host *mmc = host->mmc;
810
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100811 if (!IS_ERR(mmc->supply.vqmmc))
812 regulator_disable(mmc->supply.vqmmc);
813
Guennadi Liakhovetskib958a672012-06-20 19:10:33 +0200814 if (!IS_ERR(mmc->supply.vmmc))
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100815 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
816
817 if (host->set_pwr)
818 host->set_pwr(host->pdev, 0);
Guennadi Liakhovetskib958a672012-06-20 19:10:33 +0200819}
820
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100821/* Set MMC clock / power.
822 * Note: This controller uses a simple divider scheme therefore it cannot
823 * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as
824 * MMC wont run that fast, it has to be clocked at 12MHz which is the next
825 * slowest setting.
826 */
827static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
828{
829 struct tmio_mmc_host *host = mmc_priv(mmc);
Guennadi Liakhovetski4932bd62012-02-09 22:57:16 +0100830 struct device *dev = &host->pdev->dev;
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000831 unsigned long flags;
832
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200833 mutex_lock(&host->ios_lock);
834
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000835 spin_lock_irqsave(&host->lock, flags);
836 if (host->mrq) {
837 if (IS_ERR(host->mrq)) {
Guennadi Liakhovetski4932bd62012-02-09 22:57:16 +0100838 dev_dbg(dev,
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000839 "%s.%d: concurrent .set_ios(), clk %u, mode %u\n",
840 current->comm, task_pid_nr(current),
841 ios->clock, ios->power_mode);
842 host->mrq = ERR_PTR(-EINTR);
843 } else {
Guennadi Liakhovetski4932bd62012-02-09 22:57:16 +0100844 dev_dbg(dev,
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000845 "%s.%d: CMD%u active since %lu, now %lu!\n",
846 current->comm, task_pid_nr(current),
847 host->mrq->cmd->opcode, host->last_req_ts, jiffies);
848 }
849 spin_unlock_irqrestore(&host->lock, flags);
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200850
851 mutex_unlock(&host->ios_lock);
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000852 return;
853 }
854
855 host->mrq = ERR_PTR(-EBUSY);
856
857 spin_unlock_irqrestore(&host->lock, flags);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100858
Guennadi Liakhovetski71d111c2011-07-14 12:16:59 +0200859 /*
Guennadi Liakhovetskic391e1b2012-02-09 22:57:13 +0100860 * host->power toggles between false and true in both cases - either
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +0100861 * or not the controller can be runtime-suspended during inactivity.
862 * But if the controller has to be kept on, the runtime-pm usage_count
863 * is kept positive, so no suspending actually takes place.
Guennadi Liakhovetski71d111c2011-07-14 12:16:59 +0200864 */
865 if (ios->power_mode == MMC_POWER_ON && ios->clock) {
Guennadi Liakhovetskie83b7a82013-06-06 16:35:44 +0200866 if (host->power != TMIO_MMC_ON_RUN) {
Guennadi Liakhovetski8c102a92012-06-20 19:10:31 +0200867 tmio_mmc_clk_update(mmc);
Guennadi Liakhovetski4932bd62012-02-09 22:57:16 +0100868 pm_runtime_get_sync(dev);
Guennadi Liakhovetskib22ffdc2013-04-22 10:29:26 +0200869 if (host->resuming) {
870 tmio_mmc_reset(host);
871 host->resuming = false;
872 }
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +0000873 }
Guennadi Liakhovetskib9ec2742013-06-06 16:35:48 +0200874 if (host->power == TMIO_MMC_OFF_STOP)
875 tmio_mmc_reset(host);
Guennadi Liakhovetski71d111c2011-07-14 12:16:59 +0200876 tmio_mmc_set_clock(host, ios->clock);
Guennadi Liakhovetskie83b7a82013-06-06 16:35:44 +0200877 if (host->power == TMIO_MMC_OFF_STOP)
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100878 /* power up SD card and the bus */
879 tmio_mmc_power_on(host, ios->vdd);
Guennadi Liakhovetskie83b7a82013-06-06 16:35:44 +0200880 host->power = TMIO_MMC_ON_RUN;
Guennadi Liakhovetski5fd01572011-03-09 14:45:44 +0100881 /* start bus clock */
882 tmio_mmc_clk_start(host);
Guennadi Liakhovetski71d111c2011-07-14 12:16:59 +0200883 } else if (ios->power_mode != MMC_POWER_UP) {
Guennadi Liakhovetskie83b7a82013-06-06 16:35:44 +0200884 struct tmio_mmc_data *pdata = host->pdata;
885 unsigned int old_power = host->power;
886
887 if (old_power != TMIO_MMC_OFF_STOP) {
888 if (ios->power_mode == MMC_POWER_OFF) {
Guennadi Liakhovetski619b08d2013-02-15 16:14:00 +0100889 tmio_mmc_power_off(host);
Guennadi Liakhovetskie83b7a82013-06-06 16:35:44 +0200890 host->power = TMIO_MMC_OFF_STOP;
891 } else {
892 host->power = TMIO_MMC_ON_STOP;
893 }
894 }
895
896 if (old_power == TMIO_MMC_ON_RUN) {
Laurent Pinchart6de707f2012-06-12 23:29:35 +0200897 tmio_mmc_clk_stop(host);
Guennadi Liakhovetski4932bd62012-02-09 22:57:16 +0100898 pm_runtime_put(dev);
Guennadi Liakhovetski8c102a92012-06-20 19:10:31 +0200899 if (pdata->clk_disable)
900 pdata->clk_disable(host->pdev);
Guennadi Liakhovetski71d111c2011-07-14 12:16:59 +0200901 }
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100902 }
903
Guennadi Liakhovetskie83b7a82013-06-06 16:35:44 +0200904 if (host->power != TMIO_MMC_OFF_STOP) {
Laurent Pinchart6de707f2012-06-12 23:29:35 +0200905 switch (ios->bus_width) {
906 case MMC_BUS_WIDTH_1:
907 sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0);
908 break;
909 case MMC_BUS_WIDTH_4:
910 sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0);
911 break;
912 }
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100913 }
914
915 /* Let things settle. delay taken from winCE driver */
916 udelay(140);
Guennadi Liakhovetskidf3ef2d2011-04-21 07:20:16 +0000917 if (PTR_ERR(host->mrq) == -EINTR)
918 dev_dbg(&host->pdev->dev,
919 "%s.%d: IOS interrupted: clk %u, mode %u",
920 current->comm, task_pid_nr(current),
921 ios->clock, ios->power_mode);
922 host->mrq = NULL;
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +0200923
924 mutex_unlock(&host->ios_lock);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100925}
926
927static int tmio_mmc_get_ro(struct mmc_host *mmc)
928{
929 struct tmio_mmc_host *host = mmc_priv(mmc);
930 struct tmio_mmc_data *pdata = host->pdata;
Guennadi Liakhovetski3071caf2012-05-01 17:11:56 +0200931 int ret = mmc_gpio_get_ro(mmc);
932 if (ret >= 0)
933 return ret;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100934
Guennadi Liakhovetski7d8b4c22011-06-20 16:51:10 +0200935 return !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) ||
936 (sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT));
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100937}
938
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100939static const struct mmc_host_ops tmio_mmc_ops = {
940 .request = tmio_mmc_request,
941 .set_ios = tmio_mmc_set_ios,
942 .get_ro = tmio_mmc_get_ro,
Laurent Pinchart2b63b342013-08-08 12:38:43 +0200943 .get_cd = mmc_gpio_get_cd,
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100944 .enable_sdio_irq = tmio_mmc_enable_sdio_irq,
945};
946
Guennadi Liakhovetskib958a672012-06-20 19:10:33 +0200947static void tmio_mmc_init_ocr(struct tmio_mmc_host *host)
948{
949 struct tmio_mmc_data *pdata = host->pdata;
950 struct mmc_host *mmc = host->mmc;
951
952 mmc_regulator_get_supply(mmc);
953
954 if (!mmc->ocr_avail)
955 mmc->ocr_avail = pdata->ocr_mask ? : MMC_VDD_32_33 | MMC_VDD_33_34;
956 else if (pdata->ocr_mask)
957 dev_warn(mmc_dev(mmc), "Platform OCR mask is ignored\n");
958}
959
Guennadi Liakhovetski5a00a972013-02-15 16:13:56 +0100960static void tmio_mmc_of_parse(struct platform_device *pdev,
961 struct tmio_mmc_data *pdata)
962{
963 const struct device_node *np = pdev->dev.of_node;
964 if (!np)
965 return;
966
967 if (of_get_property(np, "toshiba,mmc-wrprotect-disable", NULL))
968 pdata->flags |= TMIO_MMC_WRPROTECT_DISABLE;
969}
970
Bill Pembertonc3be1ef2012-11-19 13:23:06 -0500971int tmio_mmc_host_probe(struct tmio_mmc_host **host,
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100972 struct platform_device *pdev,
973 struct tmio_mmc_data *pdata)
974{
975 struct tmio_mmc_host *_host;
976 struct mmc_host *mmc;
977 struct resource *res_ctl;
978 int ret;
979 u32 irq_mask = TMIO_MASK_CMD;
980
Guennadi Liakhovetski5a00a972013-02-15 16:13:56 +0100981 tmio_mmc_of_parse(pdev, pdata);
982
Guennadi Liakhovetski7b952132013-02-15 16:13:50 +0100983 if (!(pdata->flags & TMIO_MMC_HAS_IDLE_WAIT))
984 pdata->write16_hook = NULL;
985
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100986 res_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 0);
987 if (!res_ctl)
988 return -EINVAL;
989
990 mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev);
991 if (!mmc)
992 return -ENOMEM;
993
Simon Baatz274a7522013-06-09 22:14:13 +0200994 ret = mmc_of_parse(mmc);
995 if (ret < 0)
996 goto host_free;
Guennadi Liakhovetski5a00a972013-02-15 16:13:56 +0100997
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +0000998 pdata->dev = &pdev->dev;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +0100999 _host = mmc_priv(mmc);
1000 _host->pdata = pdata;
1001 _host->mmc = mmc;
1002 _host->pdev = pdev;
1003 platform_set_drvdata(pdev, mmc);
1004
1005 _host->set_pwr = pdata->set_pwr;
1006 _host->set_clk_div = pdata->set_clk_div;
1007
1008 /* SD control register space size is 0x200, 0x400 for bus_shift=1 */
1009 _host->bus_shift = resource_size(res_ctl) >> 10;
1010
1011 _host->ctl = ioremap(res_ctl->start, resource_size(res_ctl));
1012 if (!_host->ctl) {
1013 ret = -ENOMEM;
1014 goto host_free;
1015 }
1016
1017 mmc->ops = &tmio_mmc_ops;
Guennadi Liakhovetski5a00a972013-02-15 16:13:56 +01001018 mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities;
Guennadi Liakhovetski02cb3222012-05-23 10:44:37 +02001019 mmc->caps2 = pdata->capabilities2;
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001020 mmc->max_segs = 32;
1021 mmc->max_blk_size = 512;
1022 mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size) *
1023 mmc->max_segs;
1024 mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
1025 mmc->max_seg_size = mmc->max_req_size;
Guennadi Liakhovetskib958a672012-06-20 19:10:33 +02001026 tmio_mmc_init_ocr(_host);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001027
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001028 _host->native_hotplug = !(pdata->flags & TMIO_MMC_USE_GPIO_CD ||
Guennadi Liakhovetski2b1ac5c2012-02-09 22:57:08 +01001029 mmc->caps & MMC_CAP_NEEDS_POLL ||
Guennadi Liakhovetski5a00a972013-02-15 16:13:56 +01001030 mmc->caps & MMC_CAP_NONREMOVABLE ||
1031 mmc->slot.cd_irq >= 0);
Guennadi Liakhovetski2b1ac5c2012-02-09 22:57:08 +01001032
Guennadi Liakhovetskie83b7a82013-06-06 16:35:44 +02001033 _host->power = TMIO_MMC_OFF_STOP;
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001034 pm_runtime_enable(&pdev->dev);
1035 ret = pm_runtime_resume(&pdev->dev);
1036 if (ret < 0)
1037 goto pm_disable;
1038
Guennadi Liakhovetski8c102a92012-06-20 19:10:31 +02001039 if (tmio_mmc_clk_update(mmc) < 0) {
1040 mmc->f_max = pdata->hclk;
1041 mmc->f_min = mmc->f_max / 512;
1042 }
1043
Bastian Hechtcbb18b32011-12-23 23:03:13 +01001044 /*
1045 * There are 4 different scenarios for the card detection:
1046 * 1) an external gpio irq handles the cd (best for power savings)
1047 * 2) internal sdhi irq handles the cd
1048 * 3) a worker thread polls the sdhi - indicated by MMC_CAP_NEEDS_POLL
1049 * 4) the medium is non-removable - indicated by MMC_CAP_NONREMOVABLE
1050 *
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001051 * While we increment the runtime PM counter for all scenarios when
1052 * the mmc core activates us by calling an appropriate set_ios(), we
1053 * must additionally ensure that in case 2) the tmio mmc hardware stays
Bastian Hechtcbb18b32011-12-23 23:03:13 +01001054 * powered on during runtime for the card detection to work.
1055 */
Guennadi Liakhovetski2b1ac5c2012-02-09 22:57:08 +01001056 if (_host->native_hotplug)
Bastian Hechtcbb18b32011-12-23 23:03:13 +01001057 pm_runtime_get_noresume(&pdev->dev);
1058
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001059 tmio_mmc_clk_stop(_host);
1060 tmio_mmc_reset(_host);
1061
Simon Horman54680fe2011-08-25 10:27:25 +09001062 _host->sdcard_irq_mask = sd_ctrl_read32(_host, CTL_IRQ_MASK);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001063 tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL);
Guennadi Liakhovetskie0337cc2012-06-20 19:10:30 +02001064
1065 /* Unmask the IRQs we want to know about */
1066 if (!_host->chan_rx)
1067 irq_mask |= TMIO_MASK_READOP;
1068 if (!_host->chan_tx)
1069 irq_mask |= TMIO_MASK_WRITEOP;
1070 if (!_host->native_hotplug)
1071 irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
1072
1073 _host->sdcard_irq_mask &= ~irq_mask;
1074
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001075 if (pdata->flags & TMIO_MMC_SDIO_IRQ)
1076 tmio_mmc_enable_sdio_irq(mmc, 0);
1077
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001078 spin_lock_init(&_host->lock);
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +02001079 mutex_init(&_host->ios_lock);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001080
1081 /* Init delayed work for request timeouts */
1082 INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work);
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +02001083 INIT_WORK(&_host->done, tmio_mmc_done_work);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001084
1085 /* See if we also get DMA */
1086 tmio_mmc_request_dma(_host, pdata);
1087
Guennadi Liakhovetski8c102a92012-06-20 19:10:31 +02001088 ret = mmc_add_host(mmc);
1089 if (pdata->clk_disable)
1090 pdata->clk_disable(pdev);
1091 if (ret < 0) {
1092 tmio_mmc_host_remove(_host);
1093 return ret;
1094 }
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001095
Rafael J. Wysockic419e612012-03-13 01:01:51 +01001096 dev_pm_qos_expose_latency_limit(&pdev->dev, 100);
1097
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001098 if (pdata->flags & TMIO_MMC_USE_GPIO_CD) {
Laurent Pinchart214fc302013-08-08 12:38:31 +02001099 ret = mmc_gpio_request_cd(mmc, pdata->cd_gpio, 0);
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001100 if (ret < 0) {
1101 tmio_mmc_host_remove(_host);
1102 return ret;
1103 }
1104 }
1105
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001106 *host = _host;
1107
1108 return 0;
1109
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001110pm_disable:
1111 pm_runtime_disable(&pdev->dev);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001112 iounmap(_host->ctl);
1113host_free:
1114 mmc_free_host(mmc);
1115
1116 return ret;
1117}
1118EXPORT_SYMBOL(tmio_mmc_host_probe);
1119
1120void tmio_mmc_host_remove(struct tmio_mmc_host *host)
1121{
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001122 struct platform_device *pdev = host->pdev;
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001123 struct mmc_host *mmc = host->mmc;
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001124
Guennadi Liakhovetski2b1ac5c2012-02-09 22:57:08 +01001125 if (!host->native_hotplug)
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001126 pm_runtime_get_sync(&pdev->dev);
1127
Rafael J. Wysockic419e612012-03-13 01:01:51 +01001128 dev_pm_qos_hide_latency_limit(&pdev->dev);
1129
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001130 mmc_remove_host(mmc);
Guennadi Liakhovetskib9269fd2011-07-14 12:12:38 +02001131 cancel_work_sync(&host->done);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001132 cancel_delayed_work_sync(&host->delayed_reset_work);
1133 tmio_mmc_release_dma(host);
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001134
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001135 pm_runtime_put_sync(&pdev->dev);
1136 pm_runtime_disable(&pdev->dev);
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001137
1138 iounmap(host->ctl);
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001139 mmc_free_host(mmc);
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001140}
1141EXPORT_SYMBOL(tmio_mmc_host_remove);
1142
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001143#ifdef CONFIG_PM
1144int tmio_mmc_host_suspend(struct device *dev)
1145{
1146 struct mmc_host *mmc = dev_get_drvdata(dev);
1147 struct tmio_mmc_host *host = mmc_priv(mmc);
1148 int ret = mmc_suspend_host(mmc);
1149
1150 if (!ret)
1151 tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL);
1152
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001153 return ret;
1154}
1155EXPORT_SYMBOL(tmio_mmc_host_suspend);
1156
1157int tmio_mmc_host_resume(struct device *dev)
1158{
1159 struct mmc_host *mmc = dev_get_drvdata(dev);
1160 struct tmio_mmc_host *host = mmc_priv(mmc);
1161
Guennadi Liakhovetskic8be24c2012-02-09 22:57:09 +01001162 tmio_mmc_enable_dma(host, true);
1163
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001164 /* The MMC core will perform the complete set up */
Guennadi Liakhovetskib22ffdc2013-04-22 10:29:26 +02001165 host->resuming = true;
Guennadi Liakhovetskie6ee7182011-05-05 16:13:12 +00001166 return mmc_resume_host(mmc);
1167}
1168EXPORT_SYMBOL(tmio_mmc_host_resume);
1169
1170#endif /* CONFIG_PM */
1171
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001172int tmio_mmc_host_runtime_suspend(struct device *dev)
1173{
1174 return 0;
1175}
1176EXPORT_SYMBOL(tmio_mmc_host_runtime_suspend);
1177
1178int tmio_mmc_host_runtime_resume(struct device *dev)
1179{
1180 struct mmc_host *mmc = dev_get_drvdata(dev);
1181 struct tmio_mmc_host *host = mmc_priv(mmc);
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001182
Guennadi Liakhovetski162f43e2011-07-14 18:39:10 +02001183 tmio_mmc_enable_dma(host, true);
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001184
Guennadi Liakhovetski7311bef2011-05-11 16:51:11 +00001185 return 0;
1186}
1187EXPORT_SYMBOL(tmio_mmc_host_runtime_resume);
1188
Guennadi Liakhovetskib6147492011-03-23 12:42:44 +01001189MODULE_LICENSE("GPL v2");