3  * Amlogic Meson6/Meson8/Meson8b/Meson8m2 SDHC MMC host controller driver.
21 #include <linux/mmc/host.h>
68 static void meson_mx_sdhc_reset(struct meson_mx_sdhc_host *host)  in meson_mx_sdhc_reset()  argument
70 	regmap_write(host->regmap, MESON_SDHC_SRST, MESON_SDHC_SRST_MAIN_CTRL |  in meson_mx_sdhc_reset()
76 	regmap_write(host->regmap, MESON_SDHC_SRST, 0);  in meson_mx_sdhc_reset()
82 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_clear_fifo()  local
85 	regmap_read(host->regmap, MESON_SDHC_STAT, &stat);  in meson_mx_sdhc_clear_fifo()
90 	regmap_write(host->regmap, MESON_SDHC_SRST, MESON_SDHC_SRST_RXFIFO |  in meson_mx_sdhc_clear_fifo()
94 	regmap_read(host->regmap, MESON_SDHC_STAT, &stat);  in meson_mx_sdhc_clear_fifo()
97 		dev_warn(mmc_dev(host->mmc),  in meson_mx_sdhc_clear_fifo()
105 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_wait_cmd_ready()  local
109 	ret = regmap_read_poll_timeout(host->regmap, MESON_SDHC_STAT, stat,  in meson_mx_sdhc_wait_cmd_ready()
116 			 host->cmd->opcode);  in meson_mx_sdhc_wait_cmd_ready()
117 		meson_mx_sdhc_reset(host);  in meson_mx_sdhc_wait_cmd_ready()
120 	ret = regmap_read_poll_timeout(host->regmap, MESON_SDHC_ESTA, esta,  in meson_mx_sdhc_wait_cmd_ready()
127 			 host->cmd->opcode);  in meson_mx_sdhc_wait_cmd_ready()
128 		meson_mx_sdhc_reset(host);  in meson_mx_sdhc_wait_cmd_ready()
135 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_start_cmd()  local
140 	host->cmd = cmd;  in meson_mx_sdhc_start_cmd()
167 		if (host->platform->hardware_flush_all_cmds ||  in meson_mx_sdhc_start_cmd()
191 	regmap_update_bits(host->regmap, MESON_SDHC_MISC,  in meson_mx_sdhc_start_cmd()
213 	regmap_write(host->regmap, MESON_SDHC_ICTL, ictl);  in meson_mx_sdhc_start_cmd()
214 	regmap_write(host->regmap, MESON_SDHC_ISTA, MESON_SDHC_ISTA_ALL_IRQS);  in meson_mx_sdhc_start_cmd()
216 	regmap_write(host->regmap, MESON_SDHC_ARGU, cmd->arg);  in meson_mx_sdhc_start_cmd()
218 	regmap_update_bits(host->regmap, MESON_SDHC_CTRL,  in meson_mx_sdhc_start_cmd()
223 		regmap_write(host->regmap, MESON_SDHC_ADDR,  in meson_mx_sdhc_start_cmd()
229 		host->platform->set_pdma(mmc);  in meson_mx_sdhc_start_cmd()
231 	if (host->platform->wait_before_send)  in meson_mx_sdhc_start_cmd()
232 		host->platform->wait_before_send(mmc);  in meson_mx_sdhc_start_cmd()
234 	regmap_write(host->regmap, MESON_SDHC_SEND, send);  in meson_mx_sdhc_start_cmd()
239 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_disable_clks()  local
241 	if (!host->bulk_clks_enabled)  in meson_mx_sdhc_disable_clks()
244 	clk_bulk_disable_unprepare(MESON_SDHC_NUM_BULK_CLKS, host->bulk_clks);  in meson_mx_sdhc_disable_clks()
246 	host->bulk_clks_enabled = false;  in meson_mx_sdhc_disable_clks()
251 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_enable_clks()  local
254 	if (host->bulk_clks_enabled)  in meson_mx_sdhc_enable_clks()
258 				      host->bulk_clks);  in meson_mx_sdhc_enable_clks()
262 	host->bulk_clks_enabled = true;  in meson_mx_sdhc_enable_clks()
269 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_set_clk()  local
276 		ret = clk_set_rate(host->sd_clk, ios->clock);  in meson_mx_sdhc_set_clk()
280 				 ios->clock, host->error);  in meson_mx_sdhc_set_clk()
288 		mmc->actual_clock = clk_get_rate(host->sd_clk);  in meson_mx_sdhc_set_clk()
294 		regmap_read(host->regmap, MESON_SDHC_CLKC, &val);  in meson_mx_sdhc_set_clk()
296 		regmap_update_bits(host->regmap, MESON_SDHC_CLK2,  in meson_mx_sdhc_set_clk()
309 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_set_ios()  local
319 			host->error = mmc_regulator_set_ocr(mmc,  in meson_mx_sdhc_set_ios()
322 			if (host->error)  in meson_mx_sdhc_set_ios()
332 	host->error = meson_mx_sdhc_set_clk(mmc, ios);  in meson_mx_sdhc_set_ios()
333 	if (host->error)  in meson_mx_sdhc_set_ios()
338 		regmap_update_bits(host->regmap, MESON_SDHC_CTRL,  in meson_mx_sdhc_set_ios()
344 		regmap_update_bits(host->regmap, MESON_SDHC_CTRL,  in meson_mx_sdhc_set_ios()
350 		regmap_update_bits(host->regmap, MESON_SDHC_CTRL,  in meson_mx_sdhc_set_ios()
358 		host->error = -EINVAL;  in meson_mx_sdhc_set_ios()
383 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_request()  local
386 	if (!host->error)  in meson_mx_sdhc_request()
387 		host->error = meson_mx_sdhc_map_dma(mmc, mrq);  in meson_mx_sdhc_request()
389 	if (host->error) {  in meson_mx_sdhc_request()
390 		cmd->error = host->error;  in meson_mx_sdhc_request()
395 	host->mrq = mrq;  in meson_mx_sdhc_request()
402 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_card_busy()  local
405 	regmap_read(host->regmap, MESON_SDHC_STAT, &stat);  in meson_mx_sdhc_card_busy()
426 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_execute_tuning()  local
435 	regmap_read(host->regmap, MESON_SDHC_CLK2, &val);  in meson_mx_sdhc_execute_tuning()
438 	regmap_read(host->regmap, MESON_SDHC_CLKC, &val);  in meson_mx_sdhc_execute_tuning()
442 		regmap_update_bits(host->regmap, MESON_SDHC_CLK2,  in meson_mx_sdhc_execute_tuning()
482 	regmap_update_bits(host->regmap, MESON_SDHC_CLK2,  in meson_mx_sdhc_execute_tuning()
504 static void meson_mx_sdhc_request_done(struct meson_mx_sdhc_host *host)  in meson_mx_sdhc_request_done()  argument
506 	struct mmc_request *mrq = host->mrq;  in meson_mx_sdhc_request_done()
507 	struct mmc_host *mmc = host->mmc;  in meson_mx_sdhc_request_done()
510 	regmap_update_bits(host->regmap, MESON_SDHC_ICTL,  in meson_mx_sdhc_request_done()
512 	regmap_update_bits(host->regmap, MESON_SDHC_ISTA,  in meson_mx_sdhc_request_done()
515 	host->mrq = NULL;  in meson_mx_sdhc_request_done()
516 	host->cmd = NULL;  in meson_mx_sdhc_request_done()
521 static u32 meson_mx_sdhc_read_response(struct meson_mx_sdhc_host *host, u8 idx)  in meson_mx_sdhc_read_response()  argument
525 	regmap_update_bits(host->regmap, MESON_SDHC_PDMA,  in meson_mx_sdhc_read_response()
528 	regmap_update_bits(host->regmap, MESON_SDHC_PDMA,  in meson_mx_sdhc_read_response()
532 	regmap_read(host->regmap, MESON_SDHC_ARGU, &val);  in meson_mx_sdhc_read_response()
539 	struct meson_mx_sdhc_host *host = data;  in meson_mx_sdhc_irq()  local
540 	struct mmc_command *cmd = host->cmd;  in meson_mx_sdhc_irq()
543 	regmap_read(host->regmap, MESON_SDHC_ICTL, &ictl);  in meson_mx_sdhc_irq()
544 	regmap_read(host->regmap, MESON_SDHC_ISTA, &ista);  in meson_mx_sdhc_irq()
565 		dev_dbg(mmc_dev(host->mmc), "CMD%d error, ISTA: 0x%08x\n",  in meson_mx_sdhc_irq()
573 	struct meson_mx_sdhc_host *host = irq_data;  in meson_mx_sdhc_irq_thread()  local
577 	cmd = host->cmd;  in meson_mx_sdhc_irq_thread()
582 		if (!host->platform->hardware_flush_all_cmds &&  in meson_mx_sdhc_irq_thread()
584 			meson_mx_sdhc_wait_cmd_ready(host->mmc);  in meson_mx_sdhc_irq_thread()
596 			regmap_update_bits(host->regmap, MESON_SDHC_PDMA, val,  in meson_mx_sdhc_irq_thread()
600 		dma_unmap_sg(mmc_dev(host->mmc), cmd->data->sg,  in meson_mx_sdhc_irq_thread()
606 	meson_mx_sdhc_wait_cmd_ready(host->mmc);  in meson_mx_sdhc_irq_thread()
609 		cmd->resp[0] = meson_mx_sdhc_read_response(host, 4);  in meson_mx_sdhc_irq_thread()
610 		cmd->resp[1] = meson_mx_sdhc_read_response(host, 3);  in meson_mx_sdhc_irq_thread()
611 		cmd->resp[2] = meson_mx_sdhc_read_response(host, 2);  in meson_mx_sdhc_irq_thread()
612 		cmd->resp[3] = meson_mx_sdhc_read_response(host, 1);  in meson_mx_sdhc_irq_thread()
614 		cmd->resp[0] = meson_mx_sdhc_read_response(host, 0);  in meson_mx_sdhc_irq_thread()
618 		meson_mx_sdhc_reset(host);  in meson_mx_sdhc_irq_thread()
626 		meson_mx_sdhc_clear_fifo(host->mmc);  in meson_mx_sdhc_irq_thread()
628 	meson_mx_sdhc_request_done(host);  in meson_mx_sdhc_irq_thread()
635 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_init_hw_meson8()  local
637 	regmap_write(host->regmap, MESON_SDHC_MISC,  in meson_mx_sdhc_init_hw_meson8()
642 	regmap_write(host->regmap, MESON_SDHC_ENHC,  in meson_mx_sdhc_init_hw_meson8()
651 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_set_pdma_meson8()  local
653 	if (host->cmd->data->flags & MMC_DATA_WRITE)  in meson_mx_sdhc_set_pdma_meson8()
654 		regmap_update_bits(host->regmap, MESON_SDHC_PDMA,  in meson_mx_sdhc_set_pdma_meson8()
662 		regmap_update_bits(host->regmap, MESON_SDHC_PDMA,  in meson_mx_sdhc_set_pdma_meson8()
669 	if (host->cmd->data->flags & MMC_DATA_WRITE)  in meson_mx_sdhc_set_pdma_meson8()
670 		regmap_update_bits(host->regmap, MESON_SDHC_PDMA,  in meson_mx_sdhc_set_pdma_meson8()
677 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_wait_before_send_meson8()  local
681 	ret = regmap_read_poll_timeout(host->regmap, MESON_SDHC_ESTA, val,  in meson_mx_sdhc_wait_before_send_meson8()
689 	if (host->cmd->data && host->cmd->data->flags & MMC_DATA_WRITE) {  in meson_mx_sdhc_wait_before_send_meson8()
690 		ret = regmap_read_poll_timeout(host->regmap, MESON_SDHC_STAT,  in meson_mx_sdhc_wait_before_send_meson8()
702 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_init_hw_meson8m2()  local
704 	regmap_write(host->regmap, MESON_SDHC_MISC,  in meson_mx_sdhc_init_hw_meson8m2()
709 	regmap_write(host->regmap, MESON_SDHC_ENHC,  in meson_mx_sdhc_init_hw_meson8m2()
718 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_set_pdma_meson8m2()  local
720 	regmap_update_bits(host->regmap, MESON_SDHC_PDMA,  in meson_mx_sdhc_set_pdma_meson8m2()
726 	struct meson_mx_sdhc_host *host = mmc_priv(mmc);  in meson_mx_sdhc_init_hw()  local
728 	meson_mx_sdhc_reset(host);  in meson_mx_sdhc_init_hw()
730 	regmap_write(host->regmap, MESON_SDHC_CTRL,  in meson_mx_sdhc_init_hw()
740 	regmap_write(host->regmap, MESON_SDHC_CLKC, MESON_SDHC_CLKC_CLK_DIV);  in meson_mx_sdhc_init_hw()
742 	regmap_write(host->regmap, MESON_SDHC_CLK2,  in meson_mx_sdhc_init_hw()
745 	regmap_write(host->regmap, MESON_SDHC_PDMA,  in meson_mx_sdhc_init_hw()
753 	host->platform->init_hw(mmc);  in meson_mx_sdhc_init_hw()
756 	regmap_write(host->regmap, MESON_SDHC_ICTL, 0);  in meson_mx_sdhc_init_hw()
757 	regmap_write(host->regmap, MESON_SDHC_ISTA, MESON_SDHC_ISTA_ALL_IRQS);  in meson_mx_sdhc_init_hw()
763 	struct meson_mx_sdhc_host *host;  in meson_mx_sdhc_probe()  local
768 	mmc = devm_mmc_alloc_host(dev, sizeof(*host));  in meson_mx_sdhc_probe()
772 	host = mmc_priv(mmc);  in meson_mx_sdhc_probe()
773 	host->mmc = mmc;  in meson_mx_sdhc_probe()
775 	platform_set_drvdata(pdev, host);  in meson_mx_sdhc_probe()
777 	host->platform = device_get_match_data(dev);  in meson_mx_sdhc_probe()
778 	if (!host->platform)  in meson_mx_sdhc_probe()
785 	host->regmap = devm_regmap_init_mmio(dev, base,  in meson_mx_sdhc_probe()
787 	if (IS_ERR(host->regmap))  in meson_mx_sdhc_probe()
788 		return PTR_ERR(host->regmap);  in meson_mx_sdhc_probe()
790 	host->pclk = devm_clk_get(dev, "pclk");  in meson_mx_sdhc_probe()
791 	if (IS_ERR(host->pclk))  in meson_mx_sdhc_probe()
792 		return PTR_ERR(host->pclk);  in meson_mx_sdhc_probe()
795 	ret = clk_prepare_enable(host->pclk);  in meson_mx_sdhc_probe()
803 	ret = meson_mx_sdhc_register_clkc(dev, base, host->bulk_clks);  in meson_mx_sdhc_probe()
807 	host->sd_clk = host->bulk_clks[1].clk;  in meson_mx_sdhc_probe()
819 	mmc->f_min = clk_round_rate(host->sd_clk, 1);  in meson_mx_sdhc_probe()
820 	mmc->f_max = clk_round_rate(host->sd_clk, ULONG_MAX);  in meson_mx_sdhc_probe()
838 					NULL, host);  in meson_mx_sdhc_probe()
849 	clk_disable_unprepare(host->pclk);  in meson_mx_sdhc_probe()
855 	struct meson_mx_sdhc_host *host = platform_get_drvdata(pdev);  in meson_mx_sdhc_remove()  local
857 	mmc_remove_host(host->mmc);  in meson_mx_sdhc_remove()
859 	meson_mx_sdhc_disable_clks(host->mmc);  in meson_mx_sdhc_remove()
861 	clk_disable_unprepare(host->pclk);  in meson_mx_sdhc_remove()
906 MODULE_DESCRIPTION("Meson6, Meson8, Meson8b and Meson8m2 SDHC Host Driver");