2 * linux/drivers/mmc/host/pxa.c - PXA MMCI driver
4 * Copyright (C) 2003 Russell King, All Rights Reserved.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * This hardware is really sick:
11 * - No way to clear interrupts.
12 * - Have to turn off the clock whenever we touch the device.
13 * - Doesn't tell you how many data blocks were transferred.
16 * 1 and 3 byte data transfers not supported
17 * max block length up to 1023
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/ioport.h>
22 #include <linux/platform_device.h>
23 #include <linux/delay.h>
24 #include <linux/interrupt.h>
25 #include <linux/dmaengine.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/dma/pxa-dma.h>
28 #include <linux/clk.h>
29 #include <linux/err.h>
30 #include <linux/mmc/host.h>
32 #include <linux/regulator/consumer.h>
33 #include <linux/gpio.h>
34 #include <linux/gfp.h>
36 #include <linux/of_gpio.h>
37 #include <linux/of_device.h>
39 #include <asm/sizes.h>
41 #include <mach/hardware.h>
42 #include <linux/platform_data/mmc-pxamci.h>
46 #define DRIVER_NAME "pxa2xx-mci"
49 #define CLKRT_OFF (~0)
51 #define mmc_has_26MHz() (cpu_is_pxa300() || cpu_is_pxa310() \
60 unsigned long clkrate;
65 unsigned int power_mode;
66 struct pxamci_platform_data *pdata;
68 struct mmc_request *mrq;
69 struct mmc_command *cmd;
70 struct mmc_data *data;
72 struct dma_chan *dma_chan_rx;
73 struct dma_chan *dma_chan_tx;
74 dma_cookie_t dma_cookie;
79 unsigned int dma_drcmrrx;
80 unsigned int dma_drcmrtx;
82 struct regulator *vcc;
85 static inline void pxamci_init_ocr(struct pxamci_host *host)
87 #ifdef CONFIG_REGULATOR
88 host->vcc = regulator_get_optional(mmc_dev(host->mmc), "vmmc");
90 if (IS_ERR(host->vcc))
93 host->mmc->ocr_avail = mmc_regulator_get_ocrmask(host->vcc);
94 if (host->pdata && host->pdata->ocr_mask)
95 dev_warn(mmc_dev(host->mmc),
96 "ocr_mask/setpower will not be used\n");
99 if (host->vcc == NULL) {
100 /* fall-back to platform data */
101 host->mmc->ocr_avail = host->pdata ?
102 host->pdata->ocr_mask :
103 MMC_VDD_32_33 | MMC_VDD_33_34;
107 static inline int pxamci_set_power(struct pxamci_host *host,
108 unsigned char power_mode,
116 if (power_mode == MMC_POWER_UP) {
117 ret = mmc_regulator_set_ocr(host->mmc, host->vcc, vdd);
120 } else if (power_mode == MMC_POWER_OFF) {
121 ret = mmc_regulator_set_ocr(host->mmc, host->vcc, 0);
126 if (!host->vcc && host->pdata &&
127 gpio_is_valid(host->pdata->gpio_power)) {
128 on = ((1 << vdd) & host->pdata->ocr_mask);
129 gpio_set_value(host->pdata->gpio_power,
130 !!on ^ host->pdata->gpio_power_invert);
132 if (!host->vcc && host->pdata && host->pdata->setpower)
133 return host->pdata->setpower(mmc_dev(host->mmc), vdd);
138 static void pxamci_stop_clock(struct pxamci_host *host)
140 if (readl(host->base + MMC_STAT) & STAT_CLK_EN) {
141 unsigned long timeout = 10000;
144 writel(STOP_CLOCK, host->base + MMC_STRPCL);
147 v = readl(host->base + MMC_STAT);
148 if (!(v & STAT_CLK_EN))
154 dev_err(mmc_dev(host->mmc), "unable to stop clock\n");
158 static void pxamci_enable_irq(struct pxamci_host *host, unsigned int mask)
162 spin_lock_irqsave(&host->lock, flags);
163 host->imask &= ~mask;
164 writel(host->imask, host->base + MMC_I_MASK);
165 spin_unlock_irqrestore(&host->lock, flags);
168 static void pxamci_disable_irq(struct pxamci_host *host, unsigned int mask)
172 spin_lock_irqsave(&host->lock, flags);
174 writel(host->imask, host->base + MMC_I_MASK);
175 spin_unlock_irqrestore(&host->lock, flags);
178 static void pxamci_dma_irq(void *param);
180 static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data)
182 struct dma_async_tx_descriptor *tx;
183 enum dma_data_direction direction;
184 struct dma_slave_config config;
185 struct dma_chan *chan;
186 unsigned int nob = data->blocks;
187 unsigned long long clks;
188 unsigned int timeout;
193 if (data->flags & MMC_DATA_STREAM)
196 writel(nob, host->base + MMC_NOB);
197 writel(data->blksz, host->base + MMC_BLKLEN);
199 clks = (unsigned long long)data->timeout_ns * host->clkrate;
200 do_div(clks, 1000000000UL);
201 timeout = (unsigned int)clks + (data->timeout_clks << host->clkrt);
202 writel((timeout + 255) / 256, host->base + MMC_RDTO);
204 memset(&config, 0, sizeof(config));
205 config.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
206 config.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
207 config.src_addr = host->res->start + MMC_RXFIFO;
208 config.dst_addr = host->res->start + MMC_TXFIFO;
209 config.src_maxburst = 32;
210 config.dst_maxburst = 32;
212 if (data->flags & MMC_DATA_READ) {
213 host->dma_dir = DMA_FROM_DEVICE;
214 direction = DMA_DEV_TO_MEM;
215 chan = host->dma_chan_rx;
217 host->dma_dir = DMA_TO_DEVICE;
218 direction = DMA_MEM_TO_DEV;
219 chan = host->dma_chan_tx;
222 config.direction = direction;
224 ret = dmaengine_slave_config(chan, &config);
226 dev_err(mmc_dev(host->mmc), "dma slave config failed\n");
230 host->dma_len = dma_map_sg(chan->device->dev, data->sg, data->sg_len,
233 tx = dmaengine_prep_slave_sg(chan, data->sg, host->dma_len, direction,
236 dev_err(mmc_dev(host->mmc), "prep_slave_sg() failed\n");
240 if (!(data->flags & MMC_DATA_READ)) {
241 tx->callback = pxamci_dma_irq;
242 tx->callback_param = host;
245 host->dma_cookie = dmaengine_submit(tx);
248 * workaround for erratum #91:
249 * only start DMA now if we are doing a read,
250 * otherwise we wait until CMD/RESP has finished
251 * before starting DMA.
253 if (!cpu_is_pxa27x() || data->flags & MMC_DATA_READ)
254 dma_async_issue_pending(chan);
257 static void pxamci_start_cmd(struct pxamci_host *host, struct mmc_command *cmd, unsigned int cmdat)
259 WARN_ON(host->cmd != NULL);
262 if (cmd->flags & MMC_RSP_BUSY)
265 #define RSP_TYPE(x) ((x) & ~(MMC_RSP_BUSY|MMC_RSP_OPCODE))
266 switch (RSP_TYPE(mmc_resp_type(cmd))) {
267 case RSP_TYPE(MMC_RSP_R1): /* r1, r1b, r6, r7 */
268 cmdat |= CMDAT_RESP_SHORT;
270 case RSP_TYPE(MMC_RSP_R3):
271 cmdat |= CMDAT_RESP_R3;
273 case RSP_TYPE(MMC_RSP_R2):
274 cmdat |= CMDAT_RESP_R2;
280 writel(cmd->opcode, host->base + MMC_CMD);
281 writel(cmd->arg >> 16, host->base + MMC_ARGH);
282 writel(cmd->arg & 0xffff, host->base + MMC_ARGL);
283 writel(cmdat, host->base + MMC_CMDAT);
284 writel(host->clkrt, host->base + MMC_CLKRT);
286 writel(START_CLOCK, host->base + MMC_STRPCL);
288 pxamci_enable_irq(host, END_CMD_RES);
291 static void pxamci_finish_request(struct pxamci_host *host, struct mmc_request *mrq)
296 mmc_request_done(host->mmc, mrq);
299 static int pxamci_cmd_done(struct pxamci_host *host, unsigned int stat)
301 struct mmc_command *cmd = host->cmd;
311 * Did I mention this is Sick. We always need to
312 * discard the upper 8 bits of the first 16-bit word.
314 v = readl(host->base + MMC_RES) & 0xffff;
315 for (i = 0; i < 4; i++) {
316 u32 w1 = readl(host->base + MMC_RES) & 0xffff;
317 u32 w2 = readl(host->base + MMC_RES) & 0xffff;
318 cmd->resp[i] = v << 24 | w1 << 8 | w2 >> 8;
322 if (stat & STAT_TIME_OUT_RESPONSE) {
323 cmd->error = -ETIMEDOUT;
324 } else if (stat & STAT_RES_CRC_ERR && cmd->flags & MMC_RSP_CRC) {
326 * workaround for erratum #42:
327 * Intel PXA27x Family Processor Specification Update Rev 001
328 * A bogus CRC error can appear if the msb of a 136 bit
331 if (cpu_is_pxa27x() &&
332 (cmd->flags & MMC_RSP_136 && cmd->resp[0] & 0x80000000))
333 pr_debug("ignoring CRC from command %d - *risky*\n", cmd->opcode);
335 cmd->error = -EILSEQ;
338 pxamci_disable_irq(host, END_CMD_RES);
339 if (host->data && !cmd->error) {
340 pxamci_enable_irq(host, DATA_TRAN_DONE);
342 * workaround for erratum #91, if doing write
345 if (cpu_is_pxa27x() && host->data->flags & MMC_DATA_WRITE)
346 dma_async_issue_pending(host->dma_chan_tx);
348 pxamci_finish_request(host, host->mrq);
354 static int pxamci_data_done(struct pxamci_host *host, unsigned int stat)
356 struct mmc_data *data = host->data;
357 struct dma_chan *chan;
362 if (data->flags & MMC_DATA_READ)
363 chan = host->dma_chan_rx;
365 chan = host->dma_chan_tx;
366 dma_unmap_sg(chan->device->dev,
367 data->sg, data->sg_len, host->dma_dir);
369 if (stat & STAT_READ_TIME_OUT)
370 data->error = -ETIMEDOUT;
371 else if (stat & (STAT_CRC_READ_ERROR|STAT_CRC_WRITE_ERROR))
372 data->error = -EILSEQ;
375 * There appears to be a hardware design bug here. There seems to
376 * be no way to find out how much data was transferred to the card.
377 * This means that if there was an error on any block, we mark all
378 * data blocks as being in error.
381 data->bytes_xfered = data->blocks * data->blksz;
383 data->bytes_xfered = 0;
385 pxamci_disable_irq(host, DATA_TRAN_DONE);
388 if (host->mrq->stop) {
389 pxamci_stop_clock(host);
390 pxamci_start_cmd(host, host->mrq->stop, host->cmdat);
392 pxamci_finish_request(host, host->mrq);
398 static irqreturn_t pxamci_irq(int irq, void *devid)
400 struct pxamci_host *host = devid;
404 ireg = readl(host->base + MMC_I_REG) & ~readl(host->base + MMC_I_MASK);
407 unsigned stat = readl(host->base + MMC_STAT);
409 pr_debug("PXAMCI: irq %08x stat %08x\n", ireg, stat);
411 if (ireg & END_CMD_RES)
412 handled |= pxamci_cmd_done(host, stat);
413 if (ireg & DATA_TRAN_DONE)
414 handled |= pxamci_data_done(host, stat);
415 if (ireg & SDIO_INT) {
416 mmc_signal_sdio_irq(host->mmc);
421 return IRQ_RETVAL(handled);
424 static void pxamci_request(struct mmc_host *mmc, struct mmc_request *mrq)
426 struct pxamci_host *host = mmc_priv(mmc);
429 WARN_ON(host->mrq != NULL);
433 pxamci_stop_clock(host);
436 host->cmdat &= ~CMDAT_INIT;
439 pxamci_setup_data(host, mrq->data);
441 cmdat &= ~CMDAT_BUSY;
442 cmdat |= CMDAT_DATAEN | CMDAT_DMAEN;
443 if (mrq->data->flags & MMC_DATA_WRITE)
444 cmdat |= CMDAT_WRITE;
446 if (mrq->data->flags & MMC_DATA_STREAM)
447 cmdat |= CMDAT_STREAM;
450 pxamci_start_cmd(host, mrq->cmd, cmdat);
453 static int pxamci_get_ro(struct mmc_host *mmc)
455 struct pxamci_host *host = mmc_priv(mmc);
457 if (host->pdata && gpio_is_valid(host->pdata->gpio_card_ro)) {
458 if (host->pdata->gpio_card_ro_invert)
459 return !gpio_get_value(host->pdata->gpio_card_ro);
461 return gpio_get_value(host->pdata->gpio_card_ro);
463 if (host->pdata && host->pdata->get_ro)
464 return !!host->pdata->get_ro(mmc_dev(mmc));
466 * Board doesn't support read only detection; let the mmc core
472 static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
474 struct pxamci_host *host = mmc_priv(mmc);
477 unsigned long rate = host->clkrate;
478 unsigned int clk = rate / ios->clock;
480 if (host->clkrt == CLKRT_OFF)
481 clk_prepare_enable(host->clk);
483 if (ios->clock == 26000000) {
484 /* to support 26MHz */
487 /* to handle (19.5MHz, 26MHz) */
492 * clk might result in a lower divisor than we
493 * desire. check for that condition and adjust
496 if (rate / clk > ios->clock)
498 host->clkrt = fls(clk) - 1;
502 * we write clkrt on the next command
505 pxamci_stop_clock(host);
506 if (host->clkrt != CLKRT_OFF) {
507 host->clkrt = CLKRT_OFF;
508 clk_disable_unprepare(host->clk);
512 if (host->power_mode != ios->power_mode) {
515 host->power_mode = ios->power_mode;
517 ret = pxamci_set_power(host, ios->power_mode, ios->vdd);
519 dev_err(mmc_dev(mmc), "unable to set power\n");
521 * The .set_ios() function in the mmc_host_ops
522 * struct return void, and failing to set the
523 * power should be rare so we print an error and
529 if (ios->power_mode == MMC_POWER_ON)
530 host->cmdat |= CMDAT_INIT;
533 if (ios->bus_width == MMC_BUS_WIDTH_4)
534 host->cmdat |= CMDAT_SD_4DAT;
536 host->cmdat &= ~CMDAT_SD_4DAT;
538 dev_dbg(mmc_dev(mmc), "PXAMCI: clkrt = %x cmdat = %x\n",
539 host->clkrt, host->cmdat);
542 static void pxamci_enable_sdio_irq(struct mmc_host *host, int enable)
544 struct pxamci_host *pxa_host = mmc_priv(host);
547 pxamci_enable_irq(pxa_host, SDIO_INT);
549 pxamci_disable_irq(pxa_host, SDIO_INT);
552 static const struct mmc_host_ops pxamci_ops = {
553 .request = pxamci_request,
554 .get_ro = pxamci_get_ro,
555 .set_ios = pxamci_set_ios,
556 .enable_sdio_irq = pxamci_enable_sdio_irq,
559 static void pxamci_dma_irq(void *param)
561 struct pxamci_host *host = param;
562 struct dma_tx_state state;
563 enum dma_status status;
564 struct dma_chan *chan;
567 spin_lock_irqsave(&host->lock, flags);
572 if (host->data->flags & MMC_DATA_READ)
573 chan = host->dma_chan_rx;
575 chan = host->dma_chan_tx;
577 status = dmaengine_tx_status(chan, host->dma_cookie, &state);
579 if (likely(status == DMA_COMPLETE)) {
580 writel(BUF_PART_FULL, host->base + MMC_PRTBUF);
582 pr_err("%s: DMA error on %s channel\n", mmc_hostname(host->mmc),
583 host->data->flags & MMC_DATA_READ ? "rx" : "tx");
584 host->data->error = -EIO;
585 pxamci_data_done(host, 0);
589 spin_unlock_irqrestore(&host->lock, flags);
592 static irqreturn_t pxamci_detect_irq(int irq, void *devid)
594 struct pxamci_host *host = mmc_priv(devid);
596 mmc_detect_change(devid, msecs_to_jiffies(host->pdata->detect_delay_ms));
601 static const struct of_device_id pxa_mmc_dt_ids[] = {
602 { .compatible = "marvell,pxa-mmc" },
606 MODULE_DEVICE_TABLE(of, pxa_mmc_dt_ids);
608 static int pxamci_of_init(struct platform_device *pdev)
610 struct device_node *np = pdev->dev.of_node;
611 struct pxamci_platform_data *pdata;
617 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
621 pdata->gpio_card_detect =
622 of_get_named_gpio(np, "cd-gpios", 0);
623 pdata->gpio_card_ro =
624 of_get_named_gpio(np, "wp-gpios", 0);
626 /* pxa-mmc specific */
628 of_get_named_gpio(np, "pxa-mmc,gpio-power", 0);
630 if (of_property_read_u32(np, "pxa-mmc,detect-delay-ms", &tmp) == 0)
631 pdata->detect_delay_ms = tmp;
633 pdev->dev.platform_data = pdata;
638 static int pxamci_of_init(struct platform_device *pdev)
644 static int pxamci_probe(struct platform_device *pdev)
646 struct mmc_host *mmc;
647 struct pxamci_host *host = NULL;
648 struct resource *r, *dmarx, *dmatx;
649 struct pxad_param param_rx, param_tx;
650 int ret, irq, gpio_cd = -1, gpio_ro = -1, gpio_power = -1;
653 ret = pxamci_of_init(pdev);
657 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
658 irq = platform_get_irq(pdev, 0);
662 r = request_mem_region(r->start, SZ_4K, DRIVER_NAME);
666 mmc = mmc_alloc_host(sizeof(struct pxamci_host), &pdev->dev);
672 mmc->ops = &pxamci_ops;
675 * We can do SG-DMA, but we don't because we never know how much
676 * data we successfully wrote to the card.
678 mmc->max_segs = NR_SG;
681 * Our hardware DMA can handle a maximum of one page per SG entry.
683 mmc->max_seg_size = PAGE_SIZE;
686 * Block length register is only 10 bits before PXA27x.
688 mmc->max_blk_size = cpu_is_pxa25x() ? 1023 : 2048;
691 * Block count register is 16 bits.
693 mmc->max_blk_count = 65535;
695 host = mmc_priv(mmc);
697 host->pdata = pdev->dev.platform_data;
698 host->clkrt = CLKRT_OFF;
700 host->clk = clk_get(&pdev->dev, NULL);
701 if (IS_ERR(host->clk)) {
702 ret = PTR_ERR(host->clk);
707 host->clkrate = clk_get_rate(host->clk);
710 * Calculate minimum clock rate, rounding up.
712 mmc->f_min = (host->clkrate + 63) / 64;
713 mmc->f_max = (mmc_has_26MHz()) ? 26000000 : host->clkrate;
715 pxamci_init_ocr(host);
719 if (!cpu_is_pxa25x()) {
720 mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ;
721 host->cmdat |= CMDAT_SDIO_INT_EN;
723 mmc->caps |= MMC_CAP_MMC_HIGHSPEED |
724 MMC_CAP_SD_HIGHSPEED;
727 spin_lock_init(&host->lock);
730 host->imask = MMC_I_MASK_ALL;
732 host->base = ioremap(r->start, SZ_4K);
739 * Ensure that the host controller is shut down, and setup
742 pxamci_stop_clock(host);
743 writel(0, host->base + MMC_SPI);
744 writel(64, host->base + MMC_RESTO);
745 writel(host->imask, host->base + MMC_I_MASK);
747 ret = request_irq(host->irq, pxamci_irq, 0, DRIVER_NAME, host);
751 platform_set_drvdata(pdev, mmc);
753 if (!pdev->dev.of_node) {
754 dmarx = platform_get_resource(pdev, IORESOURCE_DMA, 0);
755 dmatx = platform_get_resource(pdev, IORESOURCE_DMA, 1);
756 if (!dmarx || !dmatx) {
760 param_rx.prio = PXAD_PRIO_LOWEST;
761 param_rx.drcmr = dmarx->start;
762 param_tx.prio = PXAD_PRIO_LOWEST;
763 param_tx.drcmr = dmatx->start;
767 dma_cap_set(DMA_SLAVE, mask);
770 dma_request_slave_channel_compat(mask, pxad_filter_fn,
771 ¶m_rx, &pdev->dev, "rx");
772 if (host->dma_chan_rx == NULL) {
773 dev_err(&pdev->dev, "unable to request rx dma channel\n");
779 dma_request_slave_channel_compat(mask, pxad_filter_fn,
780 ¶m_tx, &pdev->dev, "tx");
781 if (host->dma_chan_tx == NULL) {
782 dev_err(&pdev->dev, "unable to request tx dma channel\n");
788 gpio_cd = host->pdata->gpio_card_detect;
789 gpio_ro = host->pdata->gpio_card_ro;
790 gpio_power = host->pdata->gpio_power;
792 if (gpio_is_valid(gpio_power)) {
793 ret = gpio_request(gpio_power, "mmc card power");
795 dev_err(&pdev->dev, "Failed requesting gpio_power %d\n", gpio_power);
798 gpio_direction_output(gpio_power,
799 host->pdata->gpio_power_invert);
801 if (gpio_is_valid(gpio_ro)) {
802 ret = gpio_request(gpio_ro, "mmc card read only");
804 dev_err(&pdev->dev, "Failed requesting gpio_ro %d\n", gpio_ro);
807 gpio_direction_input(gpio_ro);
809 if (gpio_is_valid(gpio_cd)) {
810 ret = gpio_request(gpio_cd, "mmc card detect");
812 dev_err(&pdev->dev, "Failed requesting gpio_cd %d\n", gpio_cd);
815 gpio_direction_input(gpio_cd);
817 ret = request_irq(gpio_to_irq(gpio_cd), pxamci_detect_irq,
818 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
819 "mmc card detect", mmc);
821 dev_err(&pdev->dev, "failed to request card detect IRQ\n");
822 goto err_request_irq;
826 if (host->pdata && host->pdata->init)
827 host->pdata->init(&pdev->dev, pxamci_detect_irq, mmc);
829 if (gpio_is_valid(gpio_power) && host->pdata->setpower)
830 dev_warn(&pdev->dev, "gpio_power and setpower() both defined\n");
831 if (gpio_is_valid(gpio_ro) && host->pdata->get_ro)
832 dev_warn(&pdev->dev, "gpio_ro and get_ro() both defined\n");
843 gpio_free(gpio_power);
846 if (host->dma_chan_rx)
847 dma_release_channel(host->dma_chan_rx);
848 if (host->dma_chan_tx)
849 dma_release_channel(host->dma_chan_tx);
861 static int pxamci_remove(struct platform_device *pdev)
863 struct mmc_host *mmc = platform_get_drvdata(pdev);
864 int gpio_cd = -1, gpio_ro = -1, gpio_power = -1;
867 struct pxamci_host *host = mmc_priv(mmc);
869 mmc_remove_host(mmc);
872 gpio_cd = host->pdata->gpio_card_detect;
873 gpio_ro = host->pdata->gpio_card_ro;
874 gpio_power = host->pdata->gpio_power;
876 if (gpio_is_valid(gpio_cd)) {
877 free_irq(gpio_to_irq(gpio_cd), mmc);
880 if (gpio_is_valid(gpio_ro))
882 if (gpio_is_valid(gpio_power))
883 gpio_free(gpio_power);
885 regulator_put(host->vcc);
887 if (host->pdata && host->pdata->exit)
888 host->pdata->exit(&pdev->dev, mmc);
890 pxamci_stop_clock(host);
891 writel(TXFIFO_WR_REQ|RXFIFO_RD_REQ|CLK_IS_OFF|STOP_CMD|
892 END_CMD_RES|PRG_DONE|DATA_TRAN_DONE,
893 host->base + MMC_I_MASK);
895 free_irq(host->irq, host);
896 dmaengine_terminate_all(host->dma_chan_rx);
897 dmaengine_terminate_all(host->dma_chan_tx);
898 dma_release_channel(host->dma_chan_rx);
899 dma_release_channel(host->dma_chan_tx);
904 release_resource(host->res);
911 static struct platform_driver pxamci_driver = {
912 .probe = pxamci_probe,
913 .remove = pxamci_remove,
916 .of_match_table = of_match_ptr(pxa_mmc_dt_ids),
920 module_platform_driver(pxamci_driver);
922 MODULE_DESCRIPTION("PXA Multimedia Card Interface Driver");
923 MODULE_LICENSE("GPL");
924 MODULE_ALIAS("platform:pxa2xx-mci");