blob: 510479516b80432328b26ad827788afd4769f82d [file] [log] [blame]
Ian Campbelle24ea552014-05-05 14:42:31 +01001/*
2 * (C) Copyright 2007-2011
3 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
4 * Aaron <leafy.myeh@allwinnertech.com>
5 *
6 * MMC driver for allwinner sunxi platform.
7 *
8 * SPDX-License-Identifier: GPL-2.0+
9 */
10
11#include <common.h>
12#include <malloc.h>
13#include <mmc.h>
14#include <asm/io.h>
15#include <asm/arch/clock.h>
16#include <asm/arch/cpu.h>
Hans de Goedecd821132014-10-02 20:29:26 +020017#include <asm/arch/gpio.h>
Ian Campbelle24ea552014-05-05 14:42:31 +010018#include <asm/arch/mmc.h>
Hans de Goedecd821132014-10-02 20:29:26 +020019#include <asm-generic/gpio.h>
Ian Campbelle24ea552014-05-05 14:42:31 +010020
Ian Campbelle24ea552014-05-05 14:42:31 +010021struct sunxi_mmc_host {
22 unsigned mmc_no;
23 uint32_t *mclkreg;
Ian Campbelle24ea552014-05-05 14:42:31 +010024 unsigned fatal_err;
Ian Campbelle24ea552014-05-05 14:42:31 +010025 struct sunxi_mmc *reg;
26 struct mmc_config cfg;
27};
28
29/* support 4 mmc hosts */
30struct sunxi_mmc_host mmc_host[4];
31
Hans de Goede967325f2014-10-31 16:55:02 +010032static int sunxi_mmc_getcd_gpio(int sdc_no)
33{
34 switch (sdc_no) {
35 case 0: return sunxi_name_to_gpio(CONFIG_MMC0_CD_PIN);
36 case 1: return sunxi_name_to_gpio(CONFIG_MMC1_CD_PIN);
37 case 2: return sunxi_name_to_gpio(CONFIG_MMC2_CD_PIN);
38 case 3: return sunxi_name_to_gpio(CONFIG_MMC3_CD_PIN);
39 }
40 return -1;
41}
42
Ian Campbelle24ea552014-05-05 14:42:31 +010043static int mmc_resource_init(int sdc_no)
44{
45 struct sunxi_mmc_host *mmchost = &mmc_host[sdc_no];
46 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
Hans de Goede967325f2014-10-31 16:55:02 +010047 int cd_pin, ret = 0;
Ian Campbelle24ea552014-05-05 14:42:31 +010048
49 debug("init mmc %d resource\n", sdc_no);
50
51 switch (sdc_no) {
52 case 0:
53 mmchost->reg = (struct sunxi_mmc *)SUNXI_MMC0_BASE;
54 mmchost->mclkreg = &ccm->sd0_clk_cfg;
55 break;
56 case 1:
57 mmchost->reg = (struct sunxi_mmc *)SUNXI_MMC1_BASE;
58 mmchost->mclkreg = &ccm->sd1_clk_cfg;
59 break;
60 case 2:
61 mmchost->reg = (struct sunxi_mmc *)SUNXI_MMC2_BASE;
62 mmchost->mclkreg = &ccm->sd2_clk_cfg;
63 break;
64 case 3:
65 mmchost->reg = (struct sunxi_mmc *)SUNXI_MMC3_BASE;
66 mmchost->mclkreg = &ccm->sd3_clk_cfg;
67 break;
68 default:
69 printf("Wrong mmc number %d\n", sdc_no);
70 return -1;
71 }
Ian Campbelle24ea552014-05-05 14:42:31 +010072 mmchost->mmc_no = sdc_no;
73
Hans de Goede967325f2014-10-31 16:55:02 +010074 cd_pin = sunxi_mmc_getcd_gpio(sdc_no);
Axel Linb0c4ae12014-12-20 11:41:25 +080075 if (cd_pin != -1) {
Hans de Goede967325f2014-10-31 16:55:02 +010076 ret = gpio_request(cd_pin, "mmc_cd");
Axel Linb0c4ae12014-12-20 11:41:25 +080077 if (!ret)
78 ret = gpio_direction_input(cd_pin);
79 }
Hans de Goede967325f2014-10-31 16:55:02 +010080
81 return ret;
Ian Campbelle24ea552014-05-05 14:42:31 +010082}
83
Hans de Goedefc3a8322014-12-07 20:55:10 +010084static int mmc_set_mod_clk(struct sunxi_mmc_host *mmchost, unsigned int hz)
85{
86 unsigned int pll, pll_hz, div, n, oclk_dly, sclk_dly;
87
88 if (hz <= 24000000) {
89 pll = CCM_MMC_CTRL_OSCM24;
90 pll_hz = 24000000;
91 } else {
Hans de Goededaf22632015-01-14 19:05:03 +010092#ifdef CONFIG_MACH_SUN9I
93 pll = CCM_MMC_CTRL_PLL_PERIPH0;
94 pll_hz = clock_get_pll4_periph0();
95#else
Hans de Goedefc3a8322014-12-07 20:55:10 +010096 pll = CCM_MMC_CTRL_PLL6;
97 pll_hz = clock_get_pll6();
Hans de Goededaf22632015-01-14 19:05:03 +010098#endif
Hans de Goedefc3a8322014-12-07 20:55:10 +010099 }
100
101 div = pll_hz / hz;
102 if (pll_hz % hz)
103 div++;
104
105 n = 0;
106 while (div > 16) {
107 n++;
108 div = (div + 1) / 2;
109 }
110
111 if (n > 3) {
112 printf("mmc %u error cannot set clock to %u\n",
113 mmchost->mmc_no, hz);
114 return -1;
115 }
116
117 /* determine delays */
118 if (hz <= 400000) {
119 oclk_dly = 0;
120 sclk_dly = 7;
121 } else if (hz <= 25000000) {
122 oclk_dly = 0;
123 sclk_dly = 5;
124 } else if (hz <= 50000000) {
125 oclk_dly = 3;
126 sclk_dly = 5;
127 } else {
128 /* hz > 50000000 */
129 oclk_dly = 2;
130 sclk_dly = 4;
131 }
132
133 writel(CCM_MMC_CTRL_ENABLE | pll | CCM_MMC_CTRL_SCLK_DLY(sclk_dly) |
134 CCM_MMC_CTRL_N(n) | CCM_MMC_CTRL_OCLK_DLY(oclk_dly) |
135 CCM_MMC_CTRL_M(div), mmchost->mclkreg);
136
137 debug("mmc %u set mod-clk req %u parent %u n %u m %u rate %u\n",
138 mmchost->mmc_no, hz, pll_hz, 1u << n, div,
139 pll_hz / (1u << n) / div);
140
141 return 0;
142}
143
Ian Campbelle24ea552014-05-05 14:42:31 +0100144static int mmc_clk_io_on(int sdc_no)
145{
Ian Campbelle24ea552014-05-05 14:42:31 +0100146 struct sunxi_mmc_host *mmchost = &mmc_host[sdc_no];
147 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
148
149 debug("init mmc %d clock and io\n", sdc_no);
150
151 /* config ahb clock */
152 setbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_MMC(sdc_no));
153
Hans de Goededaf22632015-01-14 19:05:03 +0100154#if defined(CONFIG_MACH_SUN6I) || defined(CONFIG_MACH_SUN8I) || \
155 defined(CONFIG_MACH_SUN9I)
Hans de Goede1d1bd422014-10-03 20:16:26 +0800156 /* unassert reset */
157 setbits_le32(&ccm->ahb_reset0_cfg, 1 << AHB_RESET_OFFSET_MMC(sdc_no));
158#endif
Hans de Goededaf22632015-01-14 19:05:03 +0100159#if defined(CONFIG_MACH_SUN9I)
160 /* sun9i has a mmc-common module, also set the gate and reset there */
161 writel(SUNXI_MMC_COMMON_CLK_GATE | SUNXI_MMC_COMMON_RESET,
162 SUNXI_MMC_COMMON_BASE + 4 * sdc_no);
163#endif
Hans de Goede1d1bd422014-10-03 20:16:26 +0800164
Hans de Goedefc3a8322014-12-07 20:55:10 +0100165 return mmc_set_mod_clk(mmchost, 24000000);
Ian Campbelle24ea552014-05-05 14:42:31 +0100166}
167
168static int mmc_update_clk(struct mmc *mmc)
169{
170 struct sunxi_mmc_host *mmchost = mmc->priv;
171 unsigned int cmd;
172 unsigned timeout_msecs = 2000;
173
174 cmd = SUNXI_MMC_CMD_START |
175 SUNXI_MMC_CMD_UPCLK_ONLY |
176 SUNXI_MMC_CMD_WAIT_PRE_OVER;
177 writel(cmd, &mmchost->reg->cmd);
178 while (readl(&mmchost->reg->cmd) & SUNXI_MMC_CMD_START) {
179 if (!timeout_msecs--)
180 return -1;
181 udelay(1000);
182 }
183
184 /* clock update sets various irq status bits, clear these */
185 writel(readl(&mmchost->reg->rint), &mmchost->reg->rint);
186
187 return 0;
188}
189
Hans de Goedefc3a8322014-12-07 20:55:10 +0100190static int mmc_config_clock(struct mmc *mmc)
Ian Campbelle24ea552014-05-05 14:42:31 +0100191{
192 struct sunxi_mmc_host *mmchost = mmc->priv;
193 unsigned rval = readl(&mmchost->reg->clkcr);
194
195 /* Disable Clock */
196 rval &= ~SUNXI_MMC_CLK_ENABLE;
197 writel(rval, &mmchost->reg->clkcr);
198 if (mmc_update_clk(mmc))
199 return -1;
200
Hans de Goedefc3a8322014-12-07 20:55:10 +0100201 /* Set mod_clk to new rate */
202 if (mmc_set_mod_clk(mmchost, mmc->clock))
Ian Campbelle24ea552014-05-05 14:42:31 +0100203 return -1;
Hans de Goedefc3a8322014-12-07 20:55:10 +0100204
205 /* Clear internal divider */
206 rval &= ~SUNXI_MMC_CLK_DIVIDER_MASK;
207 writel(rval, &mmchost->reg->clkcr);
208
Ian Campbelle24ea552014-05-05 14:42:31 +0100209 /* Re-enable Clock */
210 rval |= SUNXI_MMC_CLK_ENABLE;
211 writel(rval, &mmchost->reg->clkcr);
Ian Campbelle24ea552014-05-05 14:42:31 +0100212 if (mmc_update_clk(mmc))
213 return -1;
214
215 return 0;
216}
217
218static void mmc_set_ios(struct mmc *mmc)
219{
220 struct sunxi_mmc_host *mmchost = mmc->priv;
Ian Campbelle24ea552014-05-05 14:42:31 +0100221
Hans de Goedefc3a8322014-12-07 20:55:10 +0100222 debug("set ios: bus_width: %x, clock: %d\n",
223 mmc->bus_width, mmc->clock);
Ian Campbelle24ea552014-05-05 14:42:31 +0100224
225 /* Change clock first */
Hans de Goedefc3a8322014-12-07 20:55:10 +0100226 if (mmc->clock && mmc_config_clock(mmc) != 0) {
227 mmchost->fatal_err = 1;
228 return;
Ian Campbelle24ea552014-05-05 14:42:31 +0100229 }
230
231 /* Change bus width */
232 if (mmc->bus_width == 8)
233 writel(0x2, &mmchost->reg->width);
234 else if (mmc->bus_width == 4)
235 writel(0x1, &mmchost->reg->width);
236 else
237 writel(0x0, &mmchost->reg->width);
238}
239
240static int mmc_core_init(struct mmc *mmc)
241{
242 struct sunxi_mmc_host *mmchost = mmc->priv;
243
244 /* Reset controller */
245 writel(SUNXI_MMC_GCTRL_RESET, &mmchost->reg->gctrl);
Hans de Goedeb6ae6762014-06-09 11:36:55 +0200246 udelay(1000);
Ian Campbelle24ea552014-05-05 14:42:31 +0100247
248 return 0;
249}
250
251static int mmc_trans_data_by_cpu(struct mmc *mmc, struct mmc_data *data)
252{
253 struct sunxi_mmc_host *mmchost = mmc->priv;
254 const int reading = !!(data->flags & MMC_DATA_READ);
255 const uint32_t status_bit = reading ? SUNXI_MMC_STATUS_FIFO_EMPTY :
256 SUNXI_MMC_STATUS_FIFO_FULL;
257 unsigned i;
258 unsigned byte_cnt = data->blocksize * data->blocks;
259 unsigned timeout_msecs = 2000;
260 unsigned *buff = (unsigned int *)(reading ? data->dest : data->src);
261
Hans de Goedeb6ae6762014-06-09 11:36:55 +0200262 /* Always read / write data through the CPU */
263 setbits_le32(&mmchost->reg->gctrl, SUNXI_MMC_GCTRL_ACCESS_BY_AHB);
264
Ian Campbelle24ea552014-05-05 14:42:31 +0100265 for (i = 0; i < (byte_cnt >> 2); i++) {
266 while (readl(&mmchost->reg->status) & status_bit) {
267 if (!timeout_msecs--)
268 return -1;
269 udelay(1000);
270 }
271
272 if (reading)
Hans de Goede1d1bd422014-10-03 20:16:26 +0800273 buff[i] = readl(&mmchost->reg->fifo);
Ian Campbelle24ea552014-05-05 14:42:31 +0100274 else
Hans de Goede1d1bd422014-10-03 20:16:26 +0800275 writel(buff[i], &mmchost->reg->fifo);
Ian Campbelle24ea552014-05-05 14:42:31 +0100276 }
277
278 return 0;
279}
280
Ian Campbelle24ea552014-05-05 14:42:31 +0100281static int mmc_rint_wait(struct mmc *mmc, unsigned int timeout_msecs,
282 unsigned int done_bit, const char *what)
283{
284 struct sunxi_mmc_host *mmchost = mmc->priv;
285 unsigned int status;
286
287 do {
288 status = readl(&mmchost->reg->rint);
289 if (!timeout_msecs-- ||
290 (status & SUNXI_MMC_RINT_INTERRUPT_ERROR_BIT)) {
291 debug("%s timeout %x\n", what,
292 status & SUNXI_MMC_RINT_INTERRUPT_ERROR_BIT);
293 return TIMEOUT;
294 }
295 udelay(1000);
296 } while (!(status & done_bit));
297
298 return 0;
299}
300
301static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
302 struct mmc_data *data)
303{
304 struct sunxi_mmc_host *mmchost = mmc->priv;
305 unsigned int cmdval = SUNXI_MMC_CMD_START;
306 unsigned int timeout_msecs;
307 int error = 0;
308 unsigned int status = 0;
Ian Campbelle24ea552014-05-05 14:42:31 +0100309 unsigned int bytecnt = 0;
310
311 if (mmchost->fatal_err)
312 return -1;
313 if (cmd->resp_type & MMC_RSP_BUSY)
314 debug("mmc cmd %d check rsp busy\n", cmd->cmdidx);
315 if (cmd->cmdidx == 12)
316 return 0;
317
318 if (!cmd->cmdidx)
319 cmdval |= SUNXI_MMC_CMD_SEND_INIT_SEQ;
320 if (cmd->resp_type & MMC_RSP_PRESENT)
321 cmdval |= SUNXI_MMC_CMD_RESP_EXPIRE;
322 if (cmd->resp_type & MMC_RSP_136)
323 cmdval |= SUNXI_MMC_CMD_LONG_RESPONSE;
324 if (cmd->resp_type & MMC_RSP_CRC)
325 cmdval |= SUNXI_MMC_CMD_CHK_RESPONSE_CRC;
326
327 if (data) {
328 if ((u32) data->dest & 0x3) {
329 error = -1;
330 goto out;
331 }
332
333 cmdval |= SUNXI_MMC_CMD_DATA_EXPIRE|SUNXI_MMC_CMD_WAIT_PRE_OVER;
334 if (data->flags & MMC_DATA_WRITE)
335 cmdval |= SUNXI_MMC_CMD_WRITE;
336 if (data->blocks > 1)
337 cmdval |= SUNXI_MMC_CMD_AUTO_STOP;
338 writel(data->blocksize, &mmchost->reg->blksz);
339 writel(data->blocks * data->blocksize, &mmchost->reg->bytecnt);
340 }
341
342 debug("mmc %d, cmd %d(0x%08x), arg 0x%08x\n", mmchost->mmc_no,
343 cmd->cmdidx, cmdval | cmd->cmdidx, cmd->cmdarg);
344 writel(cmd->cmdarg, &mmchost->reg->arg);
345
346 if (!data)
347 writel(cmdval | cmd->cmdidx, &mmchost->reg->cmd);
348
349 /*
350 * transfer data and check status
351 * STATREG[2] : FIFO empty
352 * STATREG[3] : FIFO full
353 */
354 if (data) {
355 int ret = 0;
356
357 bytecnt = data->blocksize * data->blocks;
358 debug("trans data %d bytes\n", bytecnt);
Hans de Goedeb6ae6762014-06-09 11:36:55 +0200359 writel(cmdval | cmd->cmdidx, &mmchost->reg->cmd);
360 ret = mmc_trans_data_by_cpu(mmc, data);
Ian Campbelle24ea552014-05-05 14:42:31 +0100361 if (ret) {
362 error = readl(&mmchost->reg->rint) & \
363 SUNXI_MMC_RINT_INTERRUPT_ERROR_BIT;
364 error = TIMEOUT;
365 goto out;
366 }
367 }
368
Hans de Goede5b8d7fb2015-01-15 13:50:35 +0100369 error = mmc_rint_wait(mmc, 1000, SUNXI_MMC_RINT_COMMAND_DONE, "cmd");
Ian Campbelle24ea552014-05-05 14:42:31 +0100370 if (error)
371 goto out;
372
373 if (data) {
Hans de Goedeb6ae6762014-06-09 11:36:55 +0200374 timeout_msecs = 120;
Ian Campbelle24ea552014-05-05 14:42:31 +0100375 debug("cacl timeout %x msec\n", timeout_msecs);
376 error = mmc_rint_wait(mmc, timeout_msecs,
377 data->blocks > 1 ?
378 SUNXI_MMC_RINT_AUTO_COMMAND_DONE :
379 SUNXI_MMC_RINT_DATA_OVER,
380 "data");
381 if (error)
382 goto out;
383 }
384
385 if (cmd->resp_type & MMC_RSP_BUSY) {
386 timeout_msecs = 2000;
387 do {
388 status = readl(&mmchost->reg->status);
389 if (!timeout_msecs--) {
390 debug("busy timeout\n");
391 error = TIMEOUT;
392 goto out;
393 }
394 udelay(1000);
395 } while (status & SUNXI_MMC_STATUS_CARD_DATA_BUSY);
396 }
397
398 if (cmd->resp_type & MMC_RSP_136) {
399 cmd->response[0] = readl(&mmchost->reg->resp3);
400 cmd->response[1] = readl(&mmchost->reg->resp2);
401 cmd->response[2] = readl(&mmchost->reg->resp1);
402 cmd->response[3] = readl(&mmchost->reg->resp0);
403 debug("mmc resp 0x%08x 0x%08x 0x%08x 0x%08x\n",
404 cmd->response[3], cmd->response[2],
405 cmd->response[1], cmd->response[0]);
406 } else {
407 cmd->response[0] = readl(&mmchost->reg->resp0);
408 debug("mmc resp 0x%08x\n", cmd->response[0]);
409 }
410out:
Ian Campbelle24ea552014-05-05 14:42:31 +0100411 if (error < 0) {
412 writel(SUNXI_MMC_GCTRL_RESET, &mmchost->reg->gctrl);
413 mmc_update_clk(mmc);
414 }
415 writel(0xffffffff, &mmchost->reg->rint);
416 writel(readl(&mmchost->reg->gctrl) | SUNXI_MMC_GCTRL_FIFO_RESET,
417 &mmchost->reg->gctrl);
418
419 return error;
420}
421
Hans de Goedecd821132014-10-02 20:29:26 +0200422static int sunxi_mmc_getcd(struct mmc *mmc)
423{
424 struct sunxi_mmc_host *mmchost = mmc->priv;
Hans de Goede967325f2014-10-31 16:55:02 +0100425 int cd_pin;
Hans de Goedecd821132014-10-02 20:29:26 +0200426
Hans de Goede967325f2014-10-31 16:55:02 +0100427 cd_pin = sunxi_mmc_getcd_gpio(mmchost->mmc_no);
Hans de Goedecd821132014-10-02 20:29:26 +0200428 if (cd_pin == -1)
429 return 1;
430
Axel Linb0c4ae12014-12-20 11:41:25 +0800431 return !gpio_get_value(cd_pin);
Hans de Goedecd821132014-10-02 20:29:26 +0200432}
433
Ian Campbelle24ea552014-05-05 14:42:31 +0100434static const struct mmc_ops sunxi_mmc_ops = {
435 .send_cmd = mmc_send_cmd,
436 .set_ios = mmc_set_ios,
437 .init = mmc_core_init,
Hans de Goedecd821132014-10-02 20:29:26 +0200438 .getcd = sunxi_mmc_getcd,
Ian Campbelle24ea552014-05-05 14:42:31 +0100439};
440
Hans de Goedee79c7c82014-10-02 21:13:54 +0200441struct mmc *sunxi_mmc_init(int sdc_no)
Ian Campbelle24ea552014-05-05 14:42:31 +0100442{
443 struct mmc_config *cfg = &mmc_host[sdc_no].cfg;
444
445 memset(&mmc_host[sdc_no], 0, sizeof(struct sunxi_mmc_host));
446
447 cfg->name = "SUNXI SD/MMC";
448 cfg->ops = &sunxi_mmc_ops;
449
450 cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
451 cfg->host_caps = MMC_MODE_4BIT;
452 cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
Hans de Goededaf22632015-01-14 19:05:03 +0100453#if defined(CONFIG_MACH_SUN6I) || defined(CONFIG_MACH_SUN7I) || \
454 defined(CONFIG_MACH_SUN8I) || defined(CONFIG_MACH_SUN9I)
Wills Wanga3e8c222014-09-22 18:26:03 +0800455 cfg->host_caps |= MMC_MODE_HC;
456#endif
Ian Campbelle24ea552014-05-05 14:42:31 +0100457 cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
458
459 cfg->f_min = 400000;
460 cfg->f_max = 52000000;
461
Hans de Goede967325f2014-10-31 16:55:02 +0100462 if (mmc_resource_init(sdc_no) != 0)
463 return NULL;
464
Ian Campbelle24ea552014-05-05 14:42:31 +0100465 mmc_clk_io_on(sdc_no);
466
Hans de Goedee79c7c82014-10-02 21:13:54 +0200467 return mmc_create(cfg, &mmc_host[sdc_no]);
Ian Campbelle24ea552014-05-05 14:42:31 +0100468}