1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2007-2011
4 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
5 * Aaron <leafy.myeh@allwinnertech.com>
7 * MMC driver for allwinner sunxi platform.
16 #include <asm/arch/clock.h>
17 #include <asm/arch/cpu.h>
18 #include <asm/arch/gpio.h>
19 #include <asm/arch/mmc.h>
20 #include <asm-generic/gpio.h>
23 struct sunxi_mmc_variant {
29 struct sunxi_mmc_plat {
30 struct mmc_config cfg;
34 struct sunxi_mmc_priv {
38 struct gpio_desc cd_gpio; /* Change Detect GPIO */
39 int cd_inverted; /* Inverted Card Detect */
40 struct sunxi_mmc *reg;
41 struct mmc_config cfg;
43 const struct sunxi_mmc_variant *variant;
47 #if !CONFIG_IS_ENABLED(DM_MMC)
48 /* support 4 mmc hosts */
49 struct sunxi_mmc_priv mmc_host[4];
51 static int sunxi_mmc_getcd_gpio(int sdc_no)
54 case 0: return sunxi_name_to_gpio(CONFIG_MMC0_CD_PIN);
55 case 1: return sunxi_name_to_gpio(CONFIG_MMC1_CD_PIN);
56 case 2: return sunxi_name_to_gpio(CONFIG_MMC2_CD_PIN);
57 case 3: return sunxi_name_to_gpio(CONFIG_MMC3_CD_PIN);
62 static int mmc_resource_init(int sdc_no)
64 struct sunxi_mmc_priv *priv = &mmc_host[sdc_no];
65 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
68 debug("init mmc %d resource\n", sdc_no);
72 priv->reg = (struct sunxi_mmc *)SUNXI_MMC0_BASE;
73 priv->mclkreg = &ccm->sd0_clk_cfg;
76 priv->reg = (struct sunxi_mmc *)SUNXI_MMC1_BASE;
77 priv->mclkreg = &ccm->sd1_clk_cfg;
80 priv->reg = (struct sunxi_mmc *)SUNXI_MMC2_BASE;
81 priv->mclkreg = &ccm->sd2_clk_cfg;
83 #ifdef SUNXI_MMC3_BASE
85 priv->reg = (struct sunxi_mmc *)SUNXI_MMC3_BASE;
86 priv->mclkreg = &ccm->sd3_clk_cfg;
90 printf("Wrong mmc number %d\n", sdc_no);
93 priv->mmc_no = sdc_no;
95 cd_pin = sunxi_mmc_getcd_gpio(sdc_no);
97 ret = gpio_request(cd_pin, "mmc_cd");
99 sunxi_gpio_set_pull(cd_pin, SUNXI_GPIO_PULL_UP);
100 ret = gpio_direction_input(cd_pin);
108 static int mmc_set_mod_clk(struct sunxi_mmc_priv *priv, unsigned int hz)
110 unsigned int pll, pll_hz, div, n, oclk_dly, sclk_dly;
111 bool new_mode = true;
112 bool calibrate = false;
115 if (!IS_ENABLED(CONFIG_MMC_SUNXI_HAS_NEW_MODE))
118 /* A83T support new mode only on eMMC */
119 if (IS_ENABLED(CONFIG_MACH_SUN8I_A83T) && priv->mmc_no != 2)
122 #if defined(CONFIG_MACH_SUN50I) || defined(CONFIG_MACH_SUN50I_H6)
126 if (hz <= 24000000) {
127 pll = CCM_MMC_CTRL_OSCM24;
130 #ifdef CONFIG_MACH_SUN9I
131 pll = CCM_MMC_CTRL_PLL_PERIPH0;
132 pll_hz = clock_get_pll4_periph0();
133 #elif defined(CONFIG_MACH_SUN50I_H6)
134 pll = CCM_MMC_CTRL_PLL6X2;
135 pll_hz = clock_get_pll6() * 2;
137 pll = CCM_MMC_CTRL_PLL6;
138 pll_hz = clock_get_pll6();
153 printf("mmc %u error cannot set clock to %u\n", priv->mmc_no,
158 /* determine delays */
162 } else if (hz <= 25000000) {
165 #ifdef CONFIG_MACH_SUN9I
166 } else if (hz <= 52000000) {
174 } else if (hz <= 52000000) {
185 #ifdef CONFIG_MMC_SUNXI_HAS_NEW_MODE
186 #ifdef CONFIG_MMC_SUNXI_HAS_MODE_SWITCH
187 val = CCM_MMC_CTRL_MODE_SEL_NEW;
189 setbits_le32(&priv->reg->ntsr, SUNXI_MMC_NTSR_MODE_SEL_NEW);
191 } else if (!calibrate) {
193 * Use hardcoded delay values if controller doesn't support
196 val = CCM_MMC_CTRL_OCLK_DLY(oclk_dly) |
197 CCM_MMC_CTRL_SCLK_DLY(sclk_dly);
200 writel(CCM_MMC_CTRL_ENABLE| pll | CCM_MMC_CTRL_N(n) |
201 CCM_MMC_CTRL_M(div) | val, priv->mclkreg);
203 debug("mmc %u set mod-clk req %u parent %u n %u m %u rate %u\n",
204 priv->mmc_no, hz, pll_hz, 1u << n, div, pll_hz / (1u << n) / div);
209 static int mmc_update_clk(struct sunxi_mmc_priv *priv)
212 unsigned timeout_msecs = 2000;
213 unsigned long start = get_timer(0);
215 cmd = SUNXI_MMC_CMD_START |
216 SUNXI_MMC_CMD_UPCLK_ONLY |
217 SUNXI_MMC_CMD_WAIT_PRE_OVER;
219 writel(cmd, &priv->reg->cmd);
220 while (readl(&priv->reg->cmd) & SUNXI_MMC_CMD_START) {
221 if (get_timer(start) > timeout_msecs)
225 /* clock update sets various irq status bits, clear these */
226 writel(readl(&priv->reg->rint), &priv->reg->rint);
231 static int mmc_config_clock(struct sunxi_mmc_priv *priv, struct mmc *mmc)
233 unsigned rval = readl(&priv->reg->clkcr);
236 rval &= ~SUNXI_MMC_CLK_ENABLE;
237 writel(rval, &priv->reg->clkcr);
238 if (mmc_update_clk(priv))
241 /* Set mod_clk to new rate */
242 if (mmc_set_mod_clk(priv, mmc->clock))
245 /* Clear internal divider */
246 rval &= ~SUNXI_MMC_CLK_DIVIDER_MASK;
247 writel(rval, &priv->reg->clkcr);
249 #if defined(CONFIG_MACH_SUN50I) || defined(CONFIG_MACH_SUN50I_H6)
250 /* A64 supports calibration of delays on MMC controller and we
251 * have to set delay of zero before starting calibration.
252 * Allwinner BSP driver sets a delay only in the case of
253 * using HS400 which is not supported by mainline U-Boot or
254 * Linux at the moment
256 writel(SUNXI_MMC_CAL_DL_SW_EN, &priv->reg->samp_dl);
259 /* Re-enable Clock */
260 rval |= SUNXI_MMC_CLK_ENABLE;
261 writel(rval, &priv->reg->clkcr);
262 if (mmc_update_clk(priv))
268 static int sunxi_mmc_set_ios_common(struct sunxi_mmc_priv *priv,
271 debug("set ios: bus_width: %x, clock: %d\n",
272 mmc->bus_width, mmc->clock);
274 /* Change clock first */
275 if (mmc->clock && mmc_config_clock(priv, mmc) != 0) {
280 /* Change bus width */
281 if (mmc->bus_width == 8)
282 writel(0x2, &priv->reg->width);
283 else if (mmc->bus_width == 4)
284 writel(0x1, &priv->reg->width);
286 writel(0x0, &priv->reg->width);
291 #if !CONFIG_IS_ENABLED(DM_MMC)
292 static int sunxi_mmc_core_init(struct mmc *mmc)
294 struct sunxi_mmc_priv *priv = mmc->priv;
296 /* Reset controller */
297 writel(SUNXI_MMC_GCTRL_RESET, &priv->reg->gctrl);
304 static int mmc_trans_data_by_cpu(struct sunxi_mmc_priv *priv, struct mmc *mmc,
305 struct mmc_data *data)
307 const int reading = !!(data->flags & MMC_DATA_READ);
308 const uint32_t status_bit = reading ? SUNXI_MMC_STATUS_FIFO_EMPTY :
309 SUNXI_MMC_STATUS_FIFO_FULL;
311 unsigned *buff = (unsigned int *)(reading ? data->dest : data->src);
312 unsigned byte_cnt = data->blocksize * data->blocks;
313 unsigned timeout_msecs = byte_cnt >> 8;
316 if (timeout_msecs < 2000)
317 timeout_msecs = 2000;
319 /* Always read / write data through the CPU */
320 setbits_le32(&priv->reg->gctrl, SUNXI_MMC_GCTRL_ACCESS_BY_AHB);
322 start = get_timer(0);
324 for (i = 0; i < (byte_cnt >> 2); i++) {
325 while (readl(&priv->reg->status) & status_bit) {
326 if (get_timer(start) > timeout_msecs)
331 buff[i] = readl(&priv->reg->fifo);
333 writel(buff[i], &priv->reg->fifo);
339 static int mmc_rint_wait(struct sunxi_mmc_priv *priv, struct mmc *mmc,
340 uint timeout_msecs, uint done_bit, const char *what)
343 unsigned long start = get_timer(0);
346 status = readl(&priv->reg->rint);
347 if ((get_timer(start) > timeout_msecs) ||
348 (status & SUNXI_MMC_RINT_INTERRUPT_ERROR_BIT)) {
349 debug("%s timeout %x\n", what,
350 status & SUNXI_MMC_RINT_INTERRUPT_ERROR_BIT);
353 } while (!(status & done_bit));
358 static int sunxi_mmc_send_cmd_common(struct sunxi_mmc_priv *priv,
359 struct mmc *mmc, struct mmc_cmd *cmd,
360 struct mmc_data *data)
362 unsigned int cmdval = SUNXI_MMC_CMD_START;
363 unsigned int timeout_msecs;
365 unsigned int status = 0;
366 unsigned int bytecnt = 0;
370 if (cmd->resp_type & MMC_RSP_BUSY)
371 debug("mmc cmd %d check rsp busy\n", cmd->cmdidx);
372 if (cmd->cmdidx == 12)
376 cmdval |= SUNXI_MMC_CMD_SEND_INIT_SEQ;
377 if (cmd->resp_type & MMC_RSP_PRESENT)
378 cmdval |= SUNXI_MMC_CMD_RESP_EXPIRE;
379 if (cmd->resp_type & MMC_RSP_136)
380 cmdval |= SUNXI_MMC_CMD_LONG_RESPONSE;
381 if (cmd->resp_type & MMC_RSP_CRC)
382 cmdval |= SUNXI_MMC_CMD_CHK_RESPONSE_CRC;
385 if ((u32)(long)data->dest & 0x3) {
390 cmdval |= SUNXI_MMC_CMD_DATA_EXPIRE|SUNXI_MMC_CMD_WAIT_PRE_OVER;
391 if (data->flags & MMC_DATA_WRITE)
392 cmdval |= SUNXI_MMC_CMD_WRITE;
393 if (data->blocks > 1)
394 cmdval |= SUNXI_MMC_CMD_AUTO_STOP;
395 writel(data->blocksize, &priv->reg->blksz);
396 writel(data->blocks * data->blocksize, &priv->reg->bytecnt);
399 debug("mmc %d, cmd %d(0x%08x), arg 0x%08x\n", priv->mmc_no,
400 cmd->cmdidx, cmdval | cmd->cmdidx, cmd->cmdarg);
401 writel(cmd->cmdarg, &priv->reg->arg);
404 writel(cmdval | cmd->cmdidx, &priv->reg->cmd);
407 * transfer data and check status
408 * STATREG[2] : FIFO empty
409 * STATREG[3] : FIFO full
414 bytecnt = data->blocksize * data->blocks;
415 debug("trans data %d bytes\n", bytecnt);
416 writel(cmdval | cmd->cmdidx, &priv->reg->cmd);
417 ret = mmc_trans_data_by_cpu(priv, mmc, data);
419 error = readl(&priv->reg->rint) &
420 SUNXI_MMC_RINT_INTERRUPT_ERROR_BIT;
426 error = mmc_rint_wait(priv, mmc, 1000, SUNXI_MMC_RINT_COMMAND_DONE,
433 debug("cacl timeout %x msec\n", timeout_msecs);
434 error = mmc_rint_wait(priv, mmc, timeout_msecs,
436 SUNXI_MMC_RINT_AUTO_COMMAND_DONE :
437 SUNXI_MMC_RINT_DATA_OVER,
443 if (cmd->resp_type & MMC_RSP_BUSY) {
444 unsigned long start = get_timer(0);
445 timeout_msecs = 2000;
448 status = readl(&priv->reg->status);
449 if (get_timer(start) > timeout_msecs) {
450 debug("busy timeout\n");
454 } while (status & SUNXI_MMC_STATUS_CARD_DATA_BUSY);
457 if (cmd->resp_type & MMC_RSP_136) {
458 cmd->response[0] = readl(&priv->reg->resp3);
459 cmd->response[1] = readl(&priv->reg->resp2);
460 cmd->response[2] = readl(&priv->reg->resp1);
461 cmd->response[3] = readl(&priv->reg->resp0);
462 debug("mmc resp 0x%08x 0x%08x 0x%08x 0x%08x\n",
463 cmd->response[3], cmd->response[2],
464 cmd->response[1], cmd->response[0]);
466 cmd->response[0] = readl(&priv->reg->resp0);
467 debug("mmc resp 0x%08x\n", cmd->response[0]);
471 writel(SUNXI_MMC_GCTRL_RESET, &priv->reg->gctrl);
472 mmc_update_clk(priv);
474 writel(0xffffffff, &priv->reg->rint);
475 writel(readl(&priv->reg->gctrl) | SUNXI_MMC_GCTRL_FIFO_RESET,
481 #if !CONFIG_IS_ENABLED(DM_MMC)
482 static int sunxi_mmc_set_ios_legacy(struct mmc *mmc)
484 struct sunxi_mmc_priv *priv = mmc->priv;
486 return sunxi_mmc_set_ios_common(priv, mmc);
489 static int sunxi_mmc_send_cmd_legacy(struct mmc *mmc, struct mmc_cmd *cmd,
490 struct mmc_data *data)
492 struct sunxi_mmc_priv *priv = mmc->priv;
494 return sunxi_mmc_send_cmd_common(priv, mmc, cmd, data);
497 static int sunxi_mmc_getcd_legacy(struct mmc *mmc)
499 struct sunxi_mmc_priv *priv = mmc->priv;
502 cd_pin = sunxi_mmc_getcd_gpio(priv->mmc_no);
506 return !gpio_get_value(cd_pin);
509 static const struct mmc_ops sunxi_mmc_ops = {
510 .send_cmd = sunxi_mmc_send_cmd_legacy,
511 .set_ios = sunxi_mmc_set_ios_legacy,
512 .init = sunxi_mmc_core_init,
513 .getcd = sunxi_mmc_getcd_legacy,
516 struct mmc *sunxi_mmc_init(int sdc_no)
518 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
519 struct sunxi_mmc_priv *priv = &mmc_host[sdc_no];
520 struct mmc_config *cfg = &priv->cfg;
523 memset(priv, '\0', sizeof(struct sunxi_mmc_priv));
525 cfg->name = "SUNXI SD/MMC";
526 cfg->ops = &sunxi_mmc_ops;
528 cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
529 cfg->host_caps = MMC_MODE_4BIT;
530 #if defined(CONFIG_MACH_SUN50I) || defined(CONFIG_MACH_SUN8I) || defined(CONFIG_MACH_SUN50I_H6)
532 cfg->host_caps = MMC_MODE_8BIT;
534 cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
535 cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
538 cfg->f_max = 52000000;
540 if (mmc_resource_init(sdc_no) != 0)
543 /* config ahb clock */
544 debug("init mmc %d clock and io\n", sdc_no);
545 #if !defined(CONFIG_MACH_SUN50I_H6)
546 setbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_MMC(sdc_no));
548 #ifdef CONFIG_SUNXI_GEN_SUN6I
550 setbits_le32(&ccm->ahb_reset0_cfg, 1 << AHB_RESET_OFFSET_MMC(sdc_no));
552 #if defined(CONFIG_MACH_SUN9I)
553 /* sun9i has a mmc-common module, also set the gate and reset there */
554 writel(SUNXI_MMC_COMMON_CLK_GATE | SUNXI_MMC_COMMON_RESET,
555 SUNXI_MMC_COMMON_BASE + 4 * sdc_no);
557 #else /* CONFIG_MACH_SUN50I_H6 */
558 setbits_le32(&ccm->sd_gate_reset, 1 << sdc_no);
560 setbits_le32(&ccm->sd_gate_reset, 1 << (RESET_SHIFT + sdc_no));
562 ret = mmc_set_mod_clk(priv, 24000000);
566 return mmc_create(cfg, priv);
570 static int sunxi_mmc_set_ios(struct udevice *dev)
572 struct sunxi_mmc_plat *plat = dev_get_platdata(dev);
573 struct sunxi_mmc_priv *priv = dev_get_priv(dev);
575 return sunxi_mmc_set_ios_common(priv, &plat->mmc);
578 static int sunxi_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
579 struct mmc_data *data)
581 struct sunxi_mmc_plat *plat = dev_get_platdata(dev);
582 struct sunxi_mmc_priv *priv = dev_get_priv(dev);
584 return sunxi_mmc_send_cmd_common(priv, &plat->mmc, cmd, data);
587 static int sunxi_mmc_getcd(struct udevice *dev)
589 struct sunxi_mmc_priv *priv = dev_get_priv(dev);
591 if (dm_gpio_is_valid(&priv->cd_gpio)) {
592 int cd_state = dm_gpio_get_value(&priv->cd_gpio);
594 return cd_state ^ priv->cd_inverted;
599 static const struct dm_mmc_ops sunxi_mmc_ops = {
600 .send_cmd = sunxi_mmc_send_cmd,
601 .set_ios = sunxi_mmc_set_ios,
602 .get_cd = sunxi_mmc_getcd,
605 static int sunxi_mmc_probe(struct udevice *dev)
607 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
608 struct sunxi_mmc_plat *plat = dev_get_platdata(dev);
609 struct sunxi_mmc_priv *priv = dev_get_priv(dev);
610 struct mmc_config *cfg = &plat->cfg;
611 struct ofnode_phandle_args args;
612 u32 *gate_reg, *ccu_reg;
615 cfg->name = dev->name;
616 bus_width = dev_read_u32_default(dev, "bus-width", 1);
618 cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
621 cfg->host_caps |= MMC_MODE_8BIT;
623 cfg->host_caps |= MMC_MODE_4BIT;
624 cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
625 cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
628 cfg->f_max = 52000000;
630 priv->reg = (void *)dev_read_addr(dev);
632 (const struct sunxi_mmc_variant *)dev_get_driver_data(dev);
634 /* We don't have a sunxi clock driver so find the clock address here */
635 ret = dev_read_phandle_with_args(dev, "clocks", "#clock-cells", 0,
639 ccu_reg = (u32 *)ofnode_get_addr(args.node);
641 priv->mmc_no = ((uintptr_t)priv->reg - SUNXI_MMC0_BASE) / 0x1000;
642 priv->mclkreg = (void *)ccu_reg +
643 (priv->variant->mclk_offset + (priv->mmc_no * 4));
644 gate_reg = (void *)ccu_reg + priv->variant->gate_offset;
645 setbits_le32(gate_reg, BIT(AHB_GATE_OFFSET_MMC(priv->mmc_no)));
647 ret = mmc_set_mod_clk(priv, 24000000);
651 /* This GPIO is optional */
652 if (!gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio,
654 int cd_pin = gpio_get_number(&priv->cd_gpio);
656 sunxi_gpio_set_pull(cd_pin, SUNXI_GPIO_PULL_UP);
659 /* Check if card detect is inverted */
660 priv->cd_inverted = dev_read_bool(dev, "cd-inverted");
662 upriv->mmc = &plat->mmc;
664 /* Reset controller */
665 writel(SUNXI_MMC_GCTRL_RESET, &priv->reg->gctrl);
671 static int sunxi_mmc_bind(struct udevice *dev)
673 struct sunxi_mmc_plat *plat = dev_get_platdata(dev);
675 return mmc_bind(dev, &plat->mmc, &plat->cfg);
678 static const struct sunxi_mmc_variant sun4i_a10_variant = {
683 static const struct udevice_id sunxi_mmc_ids[] = {
685 .compatible = "allwinner,sun4i-a10-mmc",
686 .data = (ulong)&sun4i_a10_variant,
689 .compatible = "allwinner,sun5i-a13-mmc",
690 .data = (ulong)&sun4i_a10_variant,
693 .compatible = "allwinner,sun7i-a20-mmc",
694 .data = (ulong)&sun4i_a10_variant,
699 U_BOOT_DRIVER(sunxi_mmc_drv) = {
702 .of_match = sunxi_mmc_ids,
703 .bind = sunxi_mmc_bind,
704 .probe = sunxi_mmc_probe,
705 .ops = &sunxi_mmc_ops,
706 .platdata_auto_alloc_size = sizeof(struct sunxi_mmc_plat),
707 .priv_auto_alloc_size = sizeof(struct sunxi_mmc_priv),