18 #include <linux/mmc/host.h>
189 static void jz4740_mmc_write_irq_mask(struct jz4740_mmc_host *host,  in jz4740_mmc_write_irq_mask()  argument
192 	if (host->version >= JZ_MMC_JZ4725B)  in jz4740_mmc_write_irq_mask()
193 		return writel(val, host->base + JZ_REG_MMC_IMASK);  in jz4740_mmc_write_irq_mask()
195 		return writew(val, host->base + JZ_REG_MMC_IMASK);  in jz4740_mmc_write_irq_mask()
198 static void jz4740_mmc_write_irq_reg(struct jz4740_mmc_host *host,  in jz4740_mmc_write_irq_reg()  argument
201 	if (host->version >= JZ_MMC_JZ4780)  in jz4740_mmc_write_irq_reg()
202 		writel(val, host->base + JZ_REG_MMC_IREG);  in jz4740_mmc_write_irq_reg()
204 		writew(val, host->base + JZ_REG_MMC_IREG);  in jz4740_mmc_write_irq_reg()
207 static uint32_t jz4740_mmc_read_irq_reg(struct jz4740_mmc_host *host)  in jz4740_mmc_read_irq_reg()  argument
209 	if (host->version >= JZ_MMC_JZ4780)  in jz4740_mmc_read_irq_reg()
210 		return readl(host->base + JZ_REG_MMC_IREG);  in jz4740_mmc_read_irq_reg()
212 		return readw(host->base + JZ_REG_MMC_IREG);  in jz4740_mmc_read_irq_reg()
218 static void jz4740_mmc_release_dma_channels(struct jz4740_mmc_host *host)  in jz4740_mmc_release_dma_channels()  argument
220 	if (!host->use_dma)  in jz4740_mmc_release_dma_channels()
223 	dma_release_channel(host->dma_tx);  in jz4740_mmc_release_dma_channels()
224 	if (host->dma_rx)  in jz4740_mmc_release_dma_channels()
225 		dma_release_channel(host->dma_rx);  in jz4740_mmc_release_dma_channels()
228 static int jz4740_mmc_acquire_dma_channels(struct jz4740_mmc_host *host)  in jz4740_mmc_acquire_dma_channels()  argument
230 	struct device *dev = mmc_dev(host->mmc);  in jz4740_mmc_acquire_dma_channels()
232 	host->dma_tx = dma_request_chan(dev, "tx-rx");  in jz4740_mmc_acquire_dma_channels()
233 	if (!IS_ERR(host->dma_tx))  in jz4740_mmc_acquire_dma_channels()
236 	if (PTR_ERR(host->dma_tx) != -ENODEV) {  in jz4740_mmc_acquire_dma_channels()
238 		return PTR_ERR(host->dma_tx);  in jz4740_mmc_acquire_dma_channels()
241 	host->dma_tx = dma_request_chan(mmc_dev(host->mmc), "tx");  in jz4740_mmc_acquire_dma_channels()
242 	if (IS_ERR(host->dma_tx)) {  in jz4740_mmc_acquire_dma_channels()
243 		dev_err(mmc_dev(host->mmc), "Failed to get dma_tx channel\n");  in jz4740_mmc_acquire_dma_channels()
244 		return PTR_ERR(host->dma_tx);  in jz4740_mmc_acquire_dma_channels()
247 	host->dma_rx = dma_request_chan(mmc_dev(host->mmc), "rx");  in jz4740_mmc_acquire_dma_channels()
248 	if (IS_ERR(host->dma_rx)) {  in jz4740_mmc_acquire_dma_channels()
249 		dev_err(mmc_dev(host->mmc), "Failed to get dma_rx channel\n");  in jz4740_mmc_acquire_dma_channels()
250 		dma_release_channel(host->dma_tx);  in jz4740_mmc_acquire_dma_channels()
251 		return PTR_ERR(host->dma_rx);  in jz4740_mmc_acquire_dma_channels()
258 	if (host->dma_tx) {  in jz4740_mmc_acquire_dma_channels()
259 		struct device *dev = host->dma_tx->device->dev;  in jz4740_mmc_acquire_dma_channels()
262 		if (max_seg_size < host->mmc->max_seg_size)  in jz4740_mmc_acquire_dma_channels()
263 			host->mmc->max_seg_size = max_seg_size;  in jz4740_mmc_acquire_dma_channels()
266 	if (host->dma_rx) {  in jz4740_mmc_acquire_dma_channels()
267 		struct device *dev = host->dma_rx->device->dev;  in jz4740_mmc_acquire_dma_channels()
270 		if (max_seg_size < host->mmc->max_seg_size)  in jz4740_mmc_acquire_dma_channels()
271 			host->mmc->max_seg_size = max_seg_size;  in jz4740_mmc_acquire_dma_channels()
277 static inline struct dma_chan *jz4740_mmc_get_dma_chan(struct jz4740_mmc_host *host,  in jz4740_mmc_get_dma_chan()  argument
280 	if ((data->flags & MMC_DATA_READ) && host->dma_rx)  in jz4740_mmc_get_dma_chan()
281 		return host->dma_rx;  in jz4740_mmc_get_dma_chan()
283 		return host->dma_tx;  in jz4740_mmc_get_dma_chan()
286 static void jz4740_mmc_dma_unmap(struct jz4740_mmc_host *host,  in jz4740_mmc_dma_unmap()  argument
289 	struct dma_chan *chan = jz4740_mmc_get_dma_chan(host, data);  in jz4740_mmc_dma_unmap()
299 static int jz4740_mmc_prepare_dma_data(struct jz4740_mmc_host *host,  in jz4740_mmc_prepare_dma_data()  argument
303 	struct dma_chan *chan = jz4740_mmc_get_dma_chan(host, data);  in jz4740_mmc_prepare_dma_data()
316 		dev_err(mmc_dev(host->mmc),  in jz4740_mmc_prepare_dma_data()
327 static int jz4740_mmc_start_dma_transfer(struct jz4740_mmc_host *host,  in jz4740_mmc_start_dma_transfer()  argument
330 	struct dma_chan *chan = jz4740_mmc_get_dma_chan(host, data);  in jz4740_mmc_start_dma_transfer()
342 		conf.dst_addr = host->mem_res->start + JZ_REG_MMC_TXFIFO;  in jz4740_mmc_start_dma_transfer()
345 		conf.src_addr = host->mem_res->start + JZ_REG_MMC_RXFIFO;  in jz4740_mmc_start_dma_transfer()
348 	sg_count = jz4740_mmc_prepare_dma_data(host, data, COOKIE_MAPPED);  in jz4740_mmc_start_dma_transfer()
357 		dev_err(mmc_dev(host->mmc),  in jz4740_mmc_start_dma_transfer()
370 		jz4740_mmc_dma_unmap(host, data);  in jz4740_mmc_start_dma_transfer()
377 	struct jz4740_mmc_host *host = mmc_priv(mmc);  in jz4740_mmc_pre_request()  local
380 	if (!host->use_dma)  in jz4740_mmc_pre_request()
384 	if (jz4740_mmc_prepare_dma_data(host, data, COOKIE_PREMAPPED) < 0)  in jz4740_mmc_pre_request()
392 	struct jz4740_mmc_host *host = mmc_priv(mmc);  in jz4740_mmc_post_request()  local
396 		jz4740_mmc_dma_unmap(host, data);  in jz4740_mmc_post_request()
399 		struct dma_chan *chan = jz4740_mmc_get_dma_chan(host, data);  in jz4740_mmc_post_request()
407 static void jz4740_mmc_set_irq_enabled(struct jz4740_mmc_host *host,  in jz4740_mmc_set_irq_enabled()  argument
412 	spin_lock_irqsave(&host->lock, flags);  in jz4740_mmc_set_irq_enabled()
414 		host->irq_mask &= ~irq;  in jz4740_mmc_set_irq_enabled()
416 		host->irq_mask |= irq;  in jz4740_mmc_set_irq_enabled()
418 	jz4740_mmc_write_irq_mask(host, host->irq_mask);  in jz4740_mmc_set_irq_enabled()
419 	spin_unlock_irqrestore(&host->lock, flags);  in jz4740_mmc_set_irq_enabled()
422 static void jz4740_mmc_clock_enable(struct jz4740_mmc_host *host,  in jz4740_mmc_clock_enable()  argument
430 	writew(val, host->base + JZ_REG_MMC_STRPCL);  in jz4740_mmc_clock_enable()
433 static void jz4740_mmc_clock_disable(struct jz4740_mmc_host *host)  in jz4740_mmc_clock_disable()  argument
438 	writew(JZ_MMC_STRPCL_CLOCK_STOP, host->base + JZ_REG_MMC_STRPCL);  in jz4740_mmc_clock_disable()
440 		status = readl(host->base + JZ_REG_MMC_STATUS);  in jz4740_mmc_clock_disable()
444 static void jz4740_mmc_reset(struct jz4740_mmc_host *host)  in jz4740_mmc_reset()  argument
449 	writew(JZ_MMC_STRPCL_RESET, host->base + JZ_REG_MMC_STRPCL);  in jz4740_mmc_reset()
452 		status = readl(host->base + JZ_REG_MMC_STATUS);  in jz4740_mmc_reset()
456 static void jz4740_mmc_request_done(struct jz4740_mmc_host *host)  in jz4740_mmc_request_done()  argument
461 	req = host->req;  in jz4740_mmc_request_done()
463 	host->req = NULL;  in jz4740_mmc_request_done()
466 		jz4740_mmc_dma_unmap(host, data);  in jz4740_mmc_request_done()
467 	mmc_request_done(host->mmc, req);  in jz4740_mmc_request_done()
470 static unsigned int jz4740_mmc_poll_irq(struct jz4740_mmc_host *host,  in jz4740_mmc_poll_irq()  argument
477 		status = jz4740_mmc_read_irq_reg(host);  in jz4740_mmc_poll_irq()
481 		set_bit(0, &host->waiting);  in jz4740_mmc_poll_irq()
482 		mod_timer(&host->timeout_timer,  in jz4740_mmc_poll_irq()
484 		jz4740_mmc_set_irq_enabled(host, irq, true);  in jz4740_mmc_poll_irq()
491 static void jz4740_mmc_transfer_check_state(struct jz4740_mmc_host *host,  in jz4740_mmc_transfer_check_state()  argument
496 	status = readl(host->base + JZ_REG_MMC_STATUS);  in jz4740_mmc_transfer_check_state()
499 			host->req->cmd->error = -ETIMEDOUT;  in jz4740_mmc_transfer_check_state()
502 			host->req->cmd->error = -EIO;  in jz4740_mmc_transfer_check_state()
507 			host->req->cmd->error = -ETIMEDOUT;  in jz4740_mmc_transfer_check_state()
510 			host->req->cmd->error = -EIO;  in jz4740_mmc_transfer_check_state()
516 static bool jz4740_mmc_write_data(struct jz4740_mmc_host *host,  in jz4740_mmc_write_data()  argument
519 	struct sg_mapping_iter *miter = &host->miter;  in jz4740_mmc_write_data()
520 	void __iomem *fifo_addr = host->base + JZ_REG_MMC_TXFIFO;  in jz4740_mmc_write_data()
531 			timeout = jz4740_mmc_poll_irq(host, JZ_MMC_IRQ_TXFIFO_WR_REQ);  in jz4740_mmc_write_data()
547 			timeout = jz4740_mmc_poll_irq(host, JZ_MMC_IRQ_TXFIFO_WR_REQ);  in jz4740_mmc_write_data()
571 static bool jz4740_mmc_read_data(struct jz4740_mmc_host *host,  in jz4740_mmc_read_data()  argument
574 	struct sg_mapping_iter *miter = &host->miter;  in jz4740_mmc_read_data()
575 	void __iomem *fifo_addr = host->base + JZ_REG_MMC_RXFIFO;  in jz4740_mmc_read_data()
588 			timeout = jz4740_mmc_poll_irq(host, JZ_MMC_IRQ_RXFIFO_RD_REQ);  in jz4740_mmc_read_data()
606 			timeout = jz4740_mmc_poll_irq(host, JZ_MMC_IRQ_RXFIFO_RD_REQ);  in jz4740_mmc_read_data()
626 	status = readl(host->base + JZ_REG_MMC_STATUS);  in jz4740_mmc_read_data()
629 		status = readl(host->base + JZ_REG_MMC_STATUS);  in jz4740_mmc_read_data()
644 	struct jz4740_mmc_host *host = timer_container_of(host, t,  in jz4740_mmc_timeout()  local
647 	if (!test_and_clear_bit(0, &host->waiting))  in jz4740_mmc_timeout()
650 	jz4740_mmc_set_irq_enabled(host, JZ_MMC_IRQ_END_CMD_RES, false);  in jz4740_mmc_timeout()
652 	host->req->cmd->error = -ETIMEDOUT;  in jz4740_mmc_timeout()
653 	jz4740_mmc_request_done(host);  in jz4740_mmc_timeout()
656 static void jz4740_mmc_read_response(struct jz4740_mmc_host *host,  in jz4740_mmc_read_response()  argument
661 	void __iomem *fifo_addr = host->base + JZ_REG_MMC_RESP_FIFO;  in jz4740_mmc_read_response()
679 static void jz4740_mmc_send_command(struct jz4740_mmc_host *host,  in jz4740_mmc_send_command()  argument
682 	uint32_t cmdat = host->cmdat;  in jz4740_mmc_send_command()
684 	host->cmdat &= ~JZ_MMC_CMDAT_INIT;  in jz4740_mmc_send_command()
685 	jz4740_mmc_clock_disable(host);  in jz4740_mmc_send_command()
687 	host->cmd = cmd;  in jz4740_mmc_send_command()
711 		if (host->use_dma) {  in jz4740_mmc_send_command()
721 			if (host->version >= JZ_MMC_JZ4780) {  in jz4740_mmc_send_command()
723 				       host->base + JZ_REG_MMC_DMAC);  in jz4740_mmc_send_command()
727 		} else if (host->version >= JZ_MMC_JZ4780) {  in jz4740_mmc_send_command()
728 			writel(0, host->base + JZ_REG_MMC_DMAC);  in jz4740_mmc_send_command()
731 		writew(cmd->data->blksz, host->base + JZ_REG_MMC_BLKLEN);  in jz4740_mmc_send_command()
732 		writew(cmd->data->blocks, host->base + JZ_REG_MMC_NOB);  in jz4740_mmc_send_command()
735 	writeb(cmd->opcode, host->base + JZ_REG_MMC_CMD);  in jz4740_mmc_send_command()
736 	writel(cmd->arg, host->base + JZ_REG_MMC_ARG);  in jz4740_mmc_send_command()
737 	writel(cmdat, host->base + JZ_REG_MMC_CMDAT);  in jz4740_mmc_send_command()
739 	jz4740_mmc_clock_enable(host, 1);  in jz4740_mmc_send_command()
742 static void jz_mmc_prepare_data_transfer(struct jz4740_mmc_host *host)  in jz_mmc_prepare_data_transfer()  argument
744 	struct mmc_command *cmd = host->req->cmd;  in jz_mmc_prepare_data_transfer()
753 	sg_miter_start(&host->miter, data->sg, data->sg_len, direction);  in jz_mmc_prepare_data_transfer()
759 	struct jz4740_mmc_host *host = (struct jz4740_mmc_host *)devid;  in jz_mmc_irq_worker()  local
760 	struct mmc_command *cmd = host->req->cmd;  in jz_mmc_irq_worker()
761 	struct mmc_request *req = host->req;  in jz_mmc_irq_worker()
766 		host->state = JZ4740_MMC_STATE_DONE;  in jz_mmc_irq_worker()
768 	switch (host->state) {  in jz_mmc_irq_worker()
771 			jz4740_mmc_read_response(host, cmd);  in jz_mmc_irq_worker()
776 		jz_mmc_prepare_data_transfer(host);  in jz_mmc_irq_worker()
780 		if (host->use_dma) {  in jz_mmc_irq_worker()
787 			timeout = jz4740_mmc_start_dma_transfer(host, data);  in jz_mmc_irq_worker()
795 			timeout = jz4740_mmc_read_data(host, data);  in jz_mmc_irq_worker()
797 			timeout = jz4740_mmc_write_data(host, data);  in jz_mmc_irq_worker()
800 			host->state = JZ4740_MMC_STATE_TRANSFER_DATA;  in jz_mmc_irq_worker()
804 		jz4740_mmc_transfer_check_state(host, data);  in jz_mmc_irq_worker()
806 		timeout = jz4740_mmc_poll_irq(host, JZ_MMC_IRQ_DATA_TRAN_DONE);  in jz_mmc_irq_worker()
808 			host->state = JZ4740_MMC_STATE_SEND_STOP;  in jz_mmc_irq_worker()
811 		jz4740_mmc_write_irq_reg(host, JZ_MMC_IRQ_DATA_TRAN_DONE);  in jz_mmc_irq_worker()
818 		jz4740_mmc_send_command(host, req->stop);  in jz_mmc_irq_worker()
821 			timeout = jz4740_mmc_poll_irq(host,  in jz_mmc_irq_worker()
824 				host->state = JZ4740_MMC_STATE_DONE;  in jz_mmc_irq_worker()
835 		jz4740_mmc_request_done(host);  in jz_mmc_irq_worker()
842 	struct jz4740_mmc_host *host = devid;  in jz_mmc_irq()  local
843 	struct mmc_command *cmd = host->cmd;  in jz_mmc_irq()
846 	status = readl(host->base + JZ_REG_MMC_STATUS);  in jz_mmc_irq()
847 	irq_reg = jz4740_mmc_read_irq_reg(host);  in jz_mmc_irq()
850 	irq_reg &= ~host->irq_mask;  in jz_mmc_irq()
856 		jz4740_mmc_write_irq_reg(host, tmp & ~irq_reg);  in jz_mmc_irq()
859 		jz4740_mmc_write_irq_reg(host, JZ_MMC_IRQ_SDIO);  in jz_mmc_irq()
860 		mmc_signal_sdio_irq(host->mmc);  in jz_mmc_irq()
864 	if (host->req && cmd && irq_reg) {  in jz_mmc_irq()
865 		if (test_and_clear_bit(0, &host->waiting)) {  in jz_mmc_irq()
866 			timer_delete(&host->timeout_timer);  in jz_mmc_irq()
879 			jz4740_mmc_set_irq_enabled(host, irq_reg, false);  in jz_mmc_irq()
880 			jz4740_mmc_write_irq_reg(host, irq_reg);  in jz_mmc_irq()
889 static int jz4740_mmc_set_clock_rate(struct jz4740_mmc_host *host, int rate)  in jz4740_mmc_set_clock_rate()  argument
894 	jz4740_mmc_clock_disable(host);  in jz4740_mmc_set_clock_rate()
895 	clk_set_rate(host->clk, host->mmc->f_max);  in jz4740_mmc_set_clock_rate()
897 	real_rate = clk_get_rate(host->clk);  in jz4740_mmc_set_clock_rate()
904 	writew(div, host->base + JZ_REG_MMC_CLKRT);  in jz4740_mmc_set_clock_rate()
907 		if (host->version >= JZ_MMC_JZ4780) {  in jz4740_mmc_set_clock_rate()
911 				   host->base + JZ_REG_MMC_LPM);  in jz4740_mmc_set_clock_rate()
912 		} else if (host->version >= JZ_MMC_JZ4760) {  in jz4740_mmc_set_clock_rate()
915 				   host->base + JZ_REG_MMC_LPM);  in jz4740_mmc_set_clock_rate()
916 		} else if (host->version >= JZ_MMC_JZ4725B)  in jz4740_mmc_set_clock_rate()
918 				   host->base + JZ_REG_MMC_LPM);  in jz4740_mmc_set_clock_rate()
926 	struct jz4740_mmc_host *host = mmc_priv(mmc);  in jz4740_mmc_request()  local
928 	host->req = req;  in jz4740_mmc_request()
930 	jz4740_mmc_write_irq_reg(host, ~0);  in jz4740_mmc_request()
931 	jz4740_mmc_set_irq_enabled(host, JZ_MMC_IRQ_END_CMD_RES, true);  in jz4740_mmc_request()
933 	host->state = JZ4740_MMC_STATE_READ_RESPONSE;  in jz4740_mmc_request()
934 	set_bit(0, &host->waiting);  in jz4740_mmc_request()
935 	mod_timer(&host->timeout_timer,  in jz4740_mmc_request()
937 	jz4740_mmc_send_command(host, req->cmd);  in jz4740_mmc_request()
942 	struct jz4740_mmc_host *host = mmc_priv(mmc);  in jz4740_mmc_set_ios()  local
946 		jz4740_mmc_set_clock_rate(host, ios->clock);  in jz4740_mmc_set_ios()
950 		jz4740_mmc_reset(host);  in jz4740_mmc_set_ios()
953 		host->cmdat |= JZ_MMC_CMDAT_INIT;  in jz4740_mmc_set_ios()
954 		clk_prepare_enable(host->clk);  in jz4740_mmc_set_ios()
957 		if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) {  in jz4740_mmc_set_ios()
960 				dev_err(&host->pdev->dev, "Failed to set vqmmc power!\n");  in jz4740_mmc_set_ios()
962 				host->vqmmc_enabled = true;  in jz4740_mmc_set_ios()
968 		if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) {  in jz4740_mmc_set_ios()
970 			host->vqmmc_enabled = false;  in jz4740_mmc_set_ios()
972 		clk_disable_unprepare(host->clk);  in jz4740_mmc_set_ios()
980 		host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_MASK;  in jz4740_mmc_set_ios()
983 		host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_MASK;  in jz4740_mmc_set_ios()
984 		host->cmdat |= JZ_MMC_CMDAT_BUS_WIDTH_4BIT;  in jz4740_mmc_set_ios()
987 		host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_MASK;  in jz4740_mmc_set_ios()
988 		host->cmdat |= JZ_MMC_CMDAT_BUS_WIDTH_8BIT;  in jz4740_mmc_set_ios()
997 	struct jz4740_mmc_host *host = mmc_priv(mmc);  in jz4740_mmc_enable_sdio_irq()  local
998 	jz4740_mmc_set_irq_enabled(host, JZ_MMC_IRQ_SDIO, enable);  in jz4740_mmc_enable_sdio_irq()
1044 	struct jz4740_mmc_host *host;  in jz4740_mmc_probe()  local
1046 	mmc = devm_mmc_alloc_host(&pdev->dev, sizeof(*host));  in jz4740_mmc_probe()
1048 		dev_err(&pdev->dev, "Failed to alloc mmc host structure\n");  in jz4740_mmc_probe()
1052 	host = mmc_priv(mmc);  in jz4740_mmc_probe()
1055 	host->version = (enum jz4740_mmc_version)device_get_match_data(&pdev->dev);  in jz4740_mmc_probe()
1064 	host->irq = platform_get_irq(pdev, 0);  in jz4740_mmc_probe()
1065 	if (host->irq < 0)  in jz4740_mmc_probe()
1066 		return host->irq;  in jz4740_mmc_probe()
1068 	host->clk = devm_clk_get(&pdev->dev, "mmc");  in jz4740_mmc_probe()
1069 	if (IS_ERR(host->clk))  in jz4740_mmc_probe()
1070 		return dev_err_probe(&pdev->dev, PTR_ERR(host->clk),  in jz4740_mmc_probe()
1073 	host->base = devm_platform_get_and_ioremap_resource(pdev, 0, &host->mem_res);  in jz4740_mmc_probe()
1074 	if (IS_ERR(host->base))  in jz4740_mmc_probe()
1075 		return PTR_ERR(host->base);  in jz4740_mmc_probe()
1087 	if (host->version == JZ_MMC_JZ4760 && mmc->f_max > JZ_MMC_CLK_RATE)  in jz4740_mmc_probe()
1106 	host->mmc = mmc;  in jz4740_mmc_probe()
1107 	host->pdev = pdev;  in jz4740_mmc_probe()
1108 	spin_lock_init(&host->lock);  in jz4740_mmc_probe()
1109 	host->irq_mask = ~0;  in jz4740_mmc_probe()
1111 	jz4740_mmc_reset(host);  in jz4740_mmc_probe()
1113 	ret = request_threaded_irq(host->irq, jz_mmc_irq, jz_mmc_irq_worker, 0,  in jz4740_mmc_probe()
1114 			dev_name(&pdev->dev), host);  in jz4740_mmc_probe()
1118 	jz4740_mmc_clock_disable(host);  in jz4740_mmc_probe()
1119 	timer_setup(&host->timeout_timer, jz4740_mmc_timeout, 0);  in jz4740_mmc_probe()
1121 	ret = jz4740_mmc_acquire_dma_channels(host);  in jz4740_mmc_probe()
1124 	host->use_dma = !ret;  in jz4740_mmc_probe()
1126 	platform_set_drvdata(pdev, host);  in jz4740_mmc_probe()
1130 		dev_err(&pdev->dev, "Failed to add mmc host: %d\n", ret);  in jz4740_mmc_probe()
1136 		 host->use_dma ? "DMA" : "PIO",  in jz4740_mmc_probe()
1143 	if (host->use_dma)  in jz4740_mmc_probe()
1144 		jz4740_mmc_release_dma_channels(host);  in jz4740_mmc_probe()
1146 	free_irq(host->irq, host);  in jz4740_mmc_probe()
1152 	struct jz4740_mmc_host *host = platform_get_drvdata(pdev);  in jz4740_mmc_remove()  local
1154 	timer_delete_sync(&host->timeout_timer);  in jz4740_mmc_remove()
1155 	jz4740_mmc_set_irq_enabled(host, 0xff, false);  in jz4740_mmc_remove()
1156 	jz4740_mmc_reset(host);  in jz4740_mmc_remove()
1158 	mmc_remove_host(host->mmc);  in jz4740_mmc_remove()
1160 	free_irq(host->irq, host);  in jz4740_mmc_remove()
1162 	if (host->use_dma)  in jz4740_mmc_remove()
1163 		jz4740_mmc_release_dma_channels(host);  in jz4740_mmc_remove()