Lines Matching full:host
48 #include <linux/mmc/host.h>
60 #define SDHSTS 0x20 /* SD host status - 11 R/W */
63 #define SDHCFG 0x38 /* Host configuration - 2 R/W */
64 #define SDHBCT 0x3c /* Host byte count (debug) - 32 R/W */
66 #define SDHBLC 0x50 /* Host block count (SDIO/SDHC) - 9 R/W */
193 static void bcm2835_dumpcmd(struct bcm2835_host *host, struct mmc_command *cmd, in bcm2835_dumpcmd() argument
196 struct device *dev = &host->pdev->dev; in bcm2835_dumpcmd()
202 (cmd == host->cmd) ? '>' : ' ', in bcm2835_dumpcmd()
208 static void bcm2835_dumpregs(struct bcm2835_host *host) in bcm2835_dumpregs() argument
210 struct mmc_request *mrq = host->mrq; in bcm2835_dumpregs()
211 struct device *dev = &host->pdev->dev; in bcm2835_dumpregs()
214 bcm2835_dumpcmd(host, mrq->sbc, "sbc"); in bcm2835_dumpregs()
215 bcm2835_dumpcmd(host, mrq->cmd, "cmd"); in bcm2835_dumpregs()
222 bcm2835_dumpcmd(host, mrq->stop, "stop"); in bcm2835_dumpregs()
226 dev_dbg(dev, "SDCMD 0x%08x\n", readl(host->ioaddr + SDCMD)); in bcm2835_dumpregs()
227 dev_dbg(dev, "SDARG 0x%08x\n", readl(host->ioaddr + SDARG)); in bcm2835_dumpregs()
228 dev_dbg(dev, "SDTOUT 0x%08x\n", readl(host->ioaddr + SDTOUT)); in bcm2835_dumpregs()
229 dev_dbg(dev, "SDCDIV 0x%08x\n", readl(host->ioaddr + SDCDIV)); in bcm2835_dumpregs()
230 dev_dbg(dev, "SDRSP0 0x%08x\n", readl(host->ioaddr + SDRSP0)); in bcm2835_dumpregs()
231 dev_dbg(dev, "SDRSP1 0x%08x\n", readl(host->ioaddr + SDRSP1)); in bcm2835_dumpregs()
232 dev_dbg(dev, "SDRSP2 0x%08x\n", readl(host->ioaddr + SDRSP2)); in bcm2835_dumpregs()
233 dev_dbg(dev, "SDRSP3 0x%08x\n", readl(host->ioaddr + SDRSP3)); in bcm2835_dumpregs()
234 dev_dbg(dev, "SDHSTS 0x%08x\n", readl(host->ioaddr + SDHSTS)); in bcm2835_dumpregs()
235 dev_dbg(dev, "SDVDD 0x%08x\n", readl(host->ioaddr + SDVDD)); in bcm2835_dumpregs()
236 dev_dbg(dev, "SDEDM 0x%08x\n", readl(host->ioaddr + SDEDM)); in bcm2835_dumpregs()
237 dev_dbg(dev, "SDHCFG 0x%08x\n", readl(host->ioaddr + SDHCFG)); in bcm2835_dumpregs()
238 dev_dbg(dev, "SDHBCT 0x%08x\n", readl(host->ioaddr + SDHBCT)); in bcm2835_dumpregs()
239 dev_dbg(dev, "SDHBLC 0x%08x\n", readl(host->ioaddr + SDHBLC)); in bcm2835_dumpregs()
243 static void bcm2835_reset_internal(struct bcm2835_host *host) in bcm2835_reset_internal() argument
247 writel(SDVDD_POWER_OFF, host->ioaddr + SDVDD); in bcm2835_reset_internal()
248 writel(0, host->ioaddr + SDCMD); in bcm2835_reset_internal()
249 writel(0, host->ioaddr + SDARG); in bcm2835_reset_internal()
250 writel(0xf00000, host->ioaddr + SDTOUT); in bcm2835_reset_internal()
251 writel(0, host->ioaddr + SDCDIV); in bcm2835_reset_internal()
252 writel(0x7f8, host->ioaddr + SDHSTS); /* Write 1s to clear */ in bcm2835_reset_internal()
253 writel(0, host->ioaddr + SDHCFG); in bcm2835_reset_internal()
254 writel(0, host->ioaddr + SDHBCT); in bcm2835_reset_internal()
255 writel(0, host->ioaddr + SDHBLC); in bcm2835_reset_internal()
258 temp = readl(host->ioaddr + SDEDM); in bcm2835_reset_internal()
263 writel(temp, host->ioaddr + SDEDM); in bcm2835_reset_internal()
265 writel(SDVDD_POWER_ON, host->ioaddr + SDVDD); in bcm2835_reset_internal()
267 host->clock = 0; in bcm2835_reset_internal()
268 writel(host->hcfg, host->ioaddr + SDHCFG); in bcm2835_reset_internal()
269 writel(host->cdiv, host->ioaddr + SDCDIV); in bcm2835_reset_internal()
274 struct bcm2835_host *host = mmc_priv(mmc); in bcm2835_reset() local
276 if (host->dma_chan) in bcm2835_reset()
277 dmaengine_terminate_sync(host->dma_chan); in bcm2835_reset()
278 host->dma_chan = NULL; in bcm2835_reset()
279 bcm2835_reset_internal(host); in bcm2835_reset()
282 static void bcm2835_finish_command(struct bcm2835_host *host);
284 static void bcm2835_wait_transfer_complete(struct bcm2835_host *host) in bcm2835_wait_transfer_complete() argument
289 alternate_idle = (host->mrq->data->flags & MMC_DATA_READ) ? in bcm2835_wait_transfer_complete()
297 edm = readl(host->ioaddr + SDEDM); in bcm2835_wait_transfer_complete()
305 host->ioaddr + SDEDM); in bcm2835_wait_transfer_complete()
311 dev_err(&host->pdev->dev, in bcm2835_wait_transfer_complete()
314 bcm2835_dumpregs(host); in bcm2835_wait_transfer_complete()
315 host->mrq->data->error = -ETIMEDOUT; in bcm2835_wait_transfer_complete()
324 struct bcm2835_host *host = param; in bcm2835_dma_complete() local
326 schedule_work(&host->dma_work); in bcm2835_dma_complete()
329 static void bcm2835_transfer_block_pio(struct bcm2835_host *host, bool is_read) in bcm2835_transfer_block_pio() argument
334 blksize = host->data->blksz; in bcm2835_transfer_block_pio()
344 if (!sg_miter_next(&host->sg_miter)) { in bcm2835_transfer_block_pio()
345 host->data->error = -EINVAL; in bcm2835_transfer_block_pio()
349 len = min(host->sg_miter.length, blksize); in bcm2835_transfer_block_pio()
351 host->data->error = -EINVAL; in bcm2835_transfer_block_pio()
356 host->sg_miter.consumed = len; in bcm2835_transfer_block_pio()
358 buf = (u32 *)host->sg_miter.addr; in bcm2835_transfer_block_pio()
367 edm = readl(host->ioaddr + SDEDM); in bcm2835_transfer_block_pio()
375 struct device *dev = &host->pdev->dev; in bcm2835_transfer_block_pio()
385 hsts = readl(host->ioaddr + SDHSTS); in bcm2835_transfer_block_pio()
400 host->ns_per_fifo_word); in bcm2835_transfer_block_pio()
410 *(buf++) = readl(host->ioaddr + SDDATA); in bcm2835_transfer_block_pio()
412 writel(*(buf++), host->ioaddr + SDDATA); in bcm2835_transfer_block_pio()
421 sg_miter_stop(&host->sg_miter); in bcm2835_transfer_block_pio()
424 static void bcm2835_transfer_pio(struct bcm2835_host *host) in bcm2835_transfer_pio() argument
426 struct device *dev = &host->pdev->dev; in bcm2835_transfer_pio()
430 is_read = (host->data->flags & MMC_DATA_READ) != 0; in bcm2835_transfer_pio()
431 bcm2835_transfer_block_pio(host, is_read); in bcm2835_transfer_pio()
433 sdhsts = readl(host->ioaddr + SDHSTS); in bcm2835_transfer_pio()
439 host->data->error = -EILSEQ; in bcm2835_transfer_pio()
444 host->data->error = -ETIMEDOUT; in bcm2835_transfer_pio()
449 void bcm2835_prepare_dma(struct bcm2835_host *host, struct mmc_data *data) in bcm2835_prepare_dma() argument
455 dma_chan = host->dma_chan_rxtx; in bcm2835_prepare_dma()
471 host->drain_words = 0; in bcm2835_prepare_dma()
484 host->drain_page = sg_page(sg); in bcm2835_prepare_dma()
485 host->drain_offset = sg->offset + sg->length; in bcm2835_prepare_dma()
488 host->drain_words = len / 4; in bcm2835_prepare_dma()
494 &host->dma_cfg_rx : in bcm2835_prepare_dma()
495 &host->dma_cfg_tx); in bcm2835_prepare_dma()
511 desc->callback_param = host; in bcm2835_prepare_dma()
512 host->dma_desc = desc; in bcm2835_prepare_dma()
513 host->dma_chan = dma_chan; in bcm2835_prepare_dma()
514 host->dma_dir = dir_data; in bcm2835_prepare_dma()
517 static void bcm2835_start_dma(struct bcm2835_host *host) in bcm2835_start_dma() argument
519 dmaengine_submit(host->dma_desc); in bcm2835_start_dma()
520 dma_async_issue_pending(host->dma_chan); in bcm2835_start_dma()
523 static void bcm2835_set_transfer_irqs(struct bcm2835_host *host) in bcm2835_set_transfer_irqs() argument
528 if (host->dma_desc) { in bcm2835_set_transfer_irqs()
529 host->hcfg = (host->hcfg & ~all_irqs) | in bcm2835_set_transfer_irqs()
532 host->hcfg = (host->hcfg & ~all_irqs) | in bcm2835_set_transfer_irqs()
537 writel(host->hcfg, host->ioaddr + SDHCFG); in bcm2835_set_transfer_irqs()
541 void bcm2835_prepare_data(struct bcm2835_host *host, struct mmc_command *cmd) in bcm2835_prepare_data() argument
545 WARN_ON(host->data); in bcm2835_prepare_data()
547 host->data = data; in bcm2835_prepare_data()
551 host->data_complete = false; in bcm2835_prepare_data()
552 host->data->bytes_xfered = 0; in bcm2835_prepare_data()
554 if (!host->dma_desc) { in bcm2835_prepare_data()
562 sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); in bcm2835_prepare_data()
563 host->blocks = data->blocks; in bcm2835_prepare_data()
566 bcm2835_set_transfer_irqs(host); in bcm2835_prepare_data()
568 writel(data->blksz, host->ioaddr + SDHBCT); in bcm2835_prepare_data()
569 writel(data->blocks, host->ioaddr + SDHBLC); in bcm2835_prepare_data()
572 static u32 bcm2835_read_wait_sdcmd(struct bcm2835_host *host, u32 max_ms) in bcm2835_read_wait_sdcmd() argument
574 struct device *dev = &host->pdev->dev; in bcm2835_read_wait_sdcmd()
578 ret = readl_poll_timeout(host->ioaddr + SDCMD, value, in bcm2835_read_wait_sdcmd()
582 ret = readl_poll_timeout(host->ioaddr + SDCMD, value, in bcm2835_read_wait_sdcmd()
591 static void bcm2835_finish_request(struct bcm2835_host *host) in bcm2835_finish_request() argument
596 cancel_delayed_work(&host->timeout_work); in bcm2835_finish_request()
598 mrq = host->mrq; in bcm2835_finish_request()
600 host->mrq = NULL; in bcm2835_finish_request()
601 host->cmd = NULL; in bcm2835_finish_request()
602 host->data = NULL; in bcm2835_finish_request()
604 host->dma_desc = NULL; in bcm2835_finish_request()
605 terminate_chan = host->dma_chan; in bcm2835_finish_request()
606 host->dma_chan = NULL; in bcm2835_finish_request()
612 dev_err(&host->pdev->dev, in bcm2835_finish_request()
616 mmc_request_done(mmc_from_priv(host), mrq); in bcm2835_finish_request()
620 bool bcm2835_send_command(struct bcm2835_host *host, struct mmc_command *cmd) in bcm2835_send_command() argument
622 struct device *dev = &host->pdev->dev; in bcm2835_send_command()
626 WARN_ON(host->cmd); in bcm2835_send_command()
628 sdcmd = bcm2835_read_wait_sdcmd(host, 100); in bcm2835_send_command()
631 bcm2835_dumpregs(host); in bcm2835_send_command()
633 bcm2835_finish_request(host); in bcm2835_send_command()
641 schedule_delayed_work(&host->timeout_work, timeout); in bcm2835_send_command()
643 host->cmd = cmd; in bcm2835_send_command()
646 sdhsts = readl(host->ioaddr + SDHSTS); in bcm2835_send_command()
648 writel(sdhsts, host->ioaddr + SDHSTS); in bcm2835_send_command()
653 bcm2835_finish_request(host); in bcm2835_send_command()
657 bcm2835_prepare_data(host, cmd); in bcm2835_send_command()
659 writel(cmd->arg, host->ioaddr + SDARG); in bcm2835_send_command()
663 host->use_busy = false; in bcm2835_send_command()
671 host->use_busy = true; in bcm2835_send_command()
682 writel(sdcmd | SDCMD_NEW_FLAG, host->ioaddr + SDCMD); in bcm2835_send_command()
687 static void bcm2835_transfer_complete(struct bcm2835_host *host) in bcm2835_transfer_complete() argument
691 WARN_ON(!host->data_complete); in bcm2835_transfer_complete()
693 data = host->data; in bcm2835_transfer_complete()
694 host->data = NULL; in bcm2835_transfer_complete()
700 if (host->mrq->stop && (data->error || !host->use_sbc)) { in bcm2835_transfer_complete()
701 if (bcm2835_send_command(host, host->mrq->stop)) { in bcm2835_transfer_complete()
703 if (!host->use_busy) in bcm2835_transfer_complete()
704 bcm2835_finish_command(host); in bcm2835_transfer_complete()
707 bcm2835_wait_transfer_complete(host); in bcm2835_transfer_complete()
708 bcm2835_finish_request(host); in bcm2835_transfer_complete()
712 static void bcm2835_finish_data(struct bcm2835_host *host) in bcm2835_finish_data() argument
714 struct device *dev = &host->pdev->dev; in bcm2835_finish_data()
717 data = host->data; in bcm2835_finish_data()
719 host->hcfg &= ~(SDHCFG_DATA_IRPT_EN | SDHCFG_BLOCK_IRPT_EN); in bcm2835_finish_data()
720 writel(host->hcfg, host->ioaddr + SDHCFG); in bcm2835_finish_data()
724 host->data_complete = true; in bcm2835_finish_data()
726 if (host->cmd) { in bcm2835_finish_data()
732 readl(host->ioaddr + SDHSTS)); in bcm2835_finish_data()
734 bcm2835_transfer_complete(host); in bcm2835_finish_data()
738 static void bcm2835_finish_command(struct bcm2835_host *host) in bcm2835_finish_command() argument
740 struct device *dev = &host->pdev->dev; in bcm2835_finish_command()
741 struct mmc_command *cmd = host->cmd; in bcm2835_finish_command()
744 sdcmd = bcm2835_read_wait_sdcmd(host, 100); in bcm2835_finish_command()
749 bcm2835_dumpregs(host); in bcm2835_finish_command()
750 host->cmd->error = -EIO; in bcm2835_finish_command()
751 bcm2835_finish_request(host); in bcm2835_finish_command()
754 u32 sdhsts = readl(host->ioaddr + SDHSTS); in bcm2835_finish_command()
757 writel(SDHSTS_ERROR_MASK, host->ioaddr + SDHSTS); in bcm2835_finish_command()
760 (host->cmd->opcode != MMC_SEND_OP_COND)) { in bcm2835_finish_command()
764 host->cmd->error = -ETIMEDOUT; in bcm2835_finish_command()
767 host->cmd->opcode); in bcm2835_finish_command()
768 bcm2835_dumpregs(host); in bcm2835_finish_command()
769 host->cmd->error = -EILSEQ; in bcm2835_finish_command()
771 edm = readl(host->ioaddr + SDEDM); in bcm2835_finish_command()
777 host->ioaddr + SDEDM); in bcm2835_finish_command()
778 bcm2835_finish_request(host); in bcm2835_finish_command()
789 readl(host->ioaddr + SDRSP0 + i * 4); in bcm2835_finish_command()
792 cmd->resp[0] = readl(host->ioaddr + SDRSP0); in bcm2835_finish_command()
796 if (cmd == host->mrq->sbc) { in bcm2835_finish_command()
798 host->cmd = NULL; in bcm2835_finish_command()
799 if (bcm2835_send_command(host, host->mrq->cmd)) { in bcm2835_finish_command()
800 if (host->data && host->dma_desc) in bcm2835_finish_command()
804 bcm2835_start_dma(host); in bcm2835_finish_command()
806 if (!host->use_busy) in bcm2835_finish_command()
807 bcm2835_finish_command(host); in bcm2835_finish_command()
809 } else if (cmd == host->mrq->stop) { in bcm2835_finish_command()
811 bcm2835_finish_request(host); in bcm2835_finish_command()
814 host->cmd = NULL; in bcm2835_finish_command()
815 if (!host->data) in bcm2835_finish_command()
816 bcm2835_finish_request(host); in bcm2835_finish_command()
817 else if (host->data_complete) in bcm2835_finish_command()
818 bcm2835_transfer_complete(host); in bcm2835_finish_command()
825 struct bcm2835_host *host = in bcm2835_timeout() local
827 struct device *dev = &host->pdev->dev; in bcm2835_timeout()
829 mutex_lock(&host->mutex); in bcm2835_timeout()
831 if (host->mrq) { in bcm2835_timeout()
833 bcm2835_dumpregs(host); in bcm2835_timeout()
835 bcm2835_reset(mmc_from_priv(host)); in bcm2835_timeout()
837 if (host->data) { in bcm2835_timeout()
838 host->data->error = -ETIMEDOUT; in bcm2835_timeout()
839 bcm2835_finish_data(host); in bcm2835_timeout()
841 if (host->cmd) in bcm2835_timeout()
842 host->cmd->error = -ETIMEDOUT; in bcm2835_timeout()
844 host->mrq->cmd->error = -ETIMEDOUT; in bcm2835_timeout()
846 bcm2835_finish_request(host); in bcm2835_timeout()
850 mutex_unlock(&host->mutex); in bcm2835_timeout()
853 static bool bcm2835_check_cmd_error(struct bcm2835_host *host, u32 intmask) in bcm2835_check_cmd_error() argument
855 struct device *dev = &host->pdev->dev; in bcm2835_check_cmd_error()
860 if (!host->cmd) in bcm2835_check_cmd_error()
865 host->cmd->error = -EILSEQ; in bcm2835_check_cmd_error()
868 if (host->mrq->data) in bcm2835_check_cmd_error()
869 host->mrq->data->error = -EILSEQ; in bcm2835_check_cmd_error()
871 host->cmd->error = -EILSEQ; in bcm2835_check_cmd_error()
873 if (host->mrq->data) in bcm2835_check_cmd_error()
874 host->mrq->data->error = -ETIMEDOUT; in bcm2835_check_cmd_error()
876 host->cmd->error = -ETIMEDOUT; in bcm2835_check_cmd_error()
878 host->cmd->error = -ETIMEDOUT; in bcm2835_check_cmd_error()
880 bcm2835_dumpregs(host); in bcm2835_check_cmd_error()
884 static void bcm2835_check_data_error(struct bcm2835_host *host, u32 intmask) in bcm2835_check_data_error() argument
886 if (!host->data) in bcm2835_check_data_error()
889 host->data->error = -EILSEQ; in bcm2835_check_data_error()
891 host->data->error = -ETIMEDOUT; in bcm2835_check_data_error()
894 static void bcm2835_busy_irq(struct bcm2835_host *host) in bcm2835_busy_irq() argument
896 if (WARN_ON(!host->cmd)) { in bcm2835_busy_irq()
897 bcm2835_dumpregs(host); in bcm2835_busy_irq()
901 if (WARN_ON(!host->use_busy)) { in bcm2835_busy_irq()
902 bcm2835_dumpregs(host); in bcm2835_busy_irq()
905 host->use_busy = false; in bcm2835_busy_irq()
907 bcm2835_finish_command(host); in bcm2835_busy_irq()
910 static void bcm2835_data_irq(struct bcm2835_host *host, u32 intmask) in bcm2835_data_irq() argument
918 if (!host->data) in bcm2835_data_irq()
921 bcm2835_check_data_error(host, intmask); in bcm2835_data_irq()
922 if (host->data->error) in bcm2835_data_irq()
925 if (host->data->flags & MMC_DATA_WRITE) { in bcm2835_data_irq()
927 host->hcfg &= ~(SDHCFG_DATA_IRPT_EN); in bcm2835_data_irq()
928 host->hcfg |= SDHCFG_BLOCK_IRPT_EN; in bcm2835_data_irq()
929 writel(host->hcfg, host->ioaddr + SDHCFG); in bcm2835_data_irq()
930 bcm2835_transfer_pio(host); in bcm2835_data_irq()
932 bcm2835_transfer_pio(host); in bcm2835_data_irq()
933 host->blocks--; in bcm2835_data_irq()
934 if ((host->blocks == 0) || host->data->error) in bcm2835_data_irq()
940 host->hcfg &= ~(SDHCFG_DATA_IRPT_EN | SDHCFG_BLOCK_IRPT_EN); in bcm2835_data_irq()
941 writel(host->hcfg, host->ioaddr + SDHCFG); in bcm2835_data_irq()
944 static void bcm2835_data_threaded_irq(struct bcm2835_host *host) in bcm2835_data_threaded_irq() argument
946 if (!host->data) in bcm2835_data_threaded_irq()
948 if ((host->blocks == 0) || host->data->error) in bcm2835_data_threaded_irq()
949 bcm2835_finish_data(host); in bcm2835_data_threaded_irq()
952 static void bcm2835_block_irq(struct bcm2835_host *host) in bcm2835_block_irq() argument
954 if (WARN_ON(!host->data)) { in bcm2835_block_irq()
955 bcm2835_dumpregs(host); in bcm2835_block_irq()
959 if (!host->dma_desc) { in bcm2835_block_irq()
960 WARN_ON(!host->blocks); in bcm2835_block_irq()
961 if (host->data->error || (--host->blocks == 0)) in bcm2835_block_irq()
962 bcm2835_finish_data(host); in bcm2835_block_irq()
964 bcm2835_transfer_pio(host); in bcm2835_block_irq()
965 } else if (host->data->flags & MMC_DATA_WRITE) { in bcm2835_block_irq()
966 bcm2835_finish_data(host); in bcm2835_block_irq()
973 struct bcm2835_host *host = dev_id; in bcm2835_irq() local
976 spin_lock(&host->lock); in bcm2835_irq()
978 intmask = readl(host->ioaddr + SDHSTS); in bcm2835_irq()
984 host->ioaddr + SDHSTS); in bcm2835_irq()
987 bcm2835_check_data_error(host, intmask); in bcm2835_irq()
988 host->irq_block = true; in bcm2835_irq()
993 if (!bcm2835_check_cmd_error(host, intmask)) { in bcm2835_irq()
994 host->irq_busy = true; in bcm2835_irq()
1006 (host->hcfg & SDHCFG_DATA_IRPT_EN)) { in bcm2835_irq()
1007 bcm2835_data_irq(host, intmask); in bcm2835_irq()
1008 host->irq_data = true; in bcm2835_irq()
1012 spin_unlock(&host->lock); in bcm2835_irq()
1019 struct bcm2835_host *host = dev_id; in bcm2835_threaded_irq() local
1023 spin_lock_irqsave(&host->lock, flags); in bcm2835_threaded_irq()
1025 block = host->irq_block; in bcm2835_threaded_irq()
1026 busy = host->irq_busy; in bcm2835_threaded_irq()
1027 data = host->irq_data; in bcm2835_threaded_irq()
1028 host->irq_block = false; in bcm2835_threaded_irq()
1029 host->irq_busy = false; in bcm2835_threaded_irq()
1030 host->irq_data = false; in bcm2835_threaded_irq()
1032 spin_unlock_irqrestore(&host->lock, flags); in bcm2835_threaded_irq()
1034 mutex_lock(&host->mutex); in bcm2835_threaded_irq()
1037 bcm2835_block_irq(host); in bcm2835_threaded_irq()
1039 bcm2835_busy_irq(host); in bcm2835_threaded_irq()
1041 bcm2835_data_threaded_irq(host); in bcm2835_threaded_irq()
1043 mutex_unlock(&host->mutex); in bcm2835_threaded_irq()
1050 struct bcm2835_host *host = in bcm2835_dma_complete_work() local
1054 mutex_lock(&host->mutex); in bcm2835_dma_complete_work()
1056 data = host->data; in bcm2835_dma_complete_work()
1058 if (host->dma_chan) { in bcm2835_dma_complete_work()
1059 dma_unmap_sg(host->dma_chan->device->dev, in bcm2835_dma_complete_work()
1061 host->dma_dir); in bcm2835_dma_complete_work()
1063 host->dma_chan = NULL; in bcm2835_dma_complete_work()
1066 if (host->drain_words) { in bcm2835_dma_complete_work()
1070 if (host->drain_offset & PAGE_MASK) { in bcm2835_dma_complete_work()
1071 host->drain_page += host->drain_offset >> PAGE_SHIFT; in bcm2835_dma_complete_work()
1072 host->drain_offset &= ~PAGE_MASK; in bcm2835_dma_complete_work()
1074 page = kmap_local_page(host->drain_page); in bcm2835_dma_complete_work()
1075 buf = page + host->drain_offset; in bcm2835_dma_complete_work()
1077 while (host->drain_words) { in bcm2835_dma_complete_work()
1078 u32 edm = readl(host->ioaddr + SDEDM); in bcm2835_dma_complete_work()
1081 *(buf++) = readl(host->ioaddr + SDDATA); in bcm2835_dma_complete_work()
1082 host->drain_words--; in bcm2835_dma_complete_work()
1088 bcm2835_finish_data(host); in bcm2835_dma_complete_work()
1090 mutex_unlock(&host->mutex); in bcm2835_dma_complete_work()
1093 static void bcm2835_set_clock(struct bcm2835_host *host, unsigned int clock) in bcm2835_set_clock() argument
1095 struct mmc_host *mmc = mmc_from_priv(host); in bcm2835_set_clock()
1123 host->cdiv = SDCDIV_MAX_CDIV; in bcm2835_set_clock()
1124 writel(host->cdiv, host->ioaddr + SDCDIV); in bcm2835_set_clock()
1128 div = host->max_clk / clock; in bcm2835_set_clock()
1131 if ((host->max_clk / div) > clock) in bcm2835_set_clock()
1138 clock = host->max_clk / (div + 2); in bcm2835_set_clock()
1143 host->ns_per_fifo_word = (1000000000 / clock) * in bcm2835_set_clock()
1146 host->cdiv = div; in bcm2835_set_clock()
1147 writel(host->cdiv, host->ioaddr + SDCDIV); in bcm2835_set_clock()
1150 writel(mmc->actual_clock / 2, host->ioaddr + SDTOUT); in bcm2835_set_clock()
1155 struct bcm2835_host *host = mmc_priv(mmc); in bcm2835_request() local
1156 struct device *dev = &host->pdev->dev; in bcm2835_request()
1180 mutex_lock(&host->mutex); in bcm2835_request()
1182 WARN_ON(host->mrq); in bcm2835_request()
1183 host->mrq = mrq; in bcm2835_request()
1185 edm = readl(host->ioaddr + SDEDM); in bcm2835_request()
1191 readl(host->ioaddr + SDCMD) & SDCMD_CMD_MASK, in bcm2835_request()
1193 bcm2835_dumpregs(host); in bcm2835_request()
1198 bcm2835_finish_request(host); in bcm2835_request()
1199 mutex_unlock(&host->mutex); in bcm2835_request()
1203 if (host->use_dma && mrq->data && (mrq->data->blocks > PIO_THRESHOLD)) in bcm2835_request()
1204 bcm2835_prepare_dma(host, mrq->data); in bcm2835_request()
1206 host->use_sbc = !!mrq->sbc && host->mrq->data && in bcm2835_request()
1207 (host->mrq->data->flags & MMC_DATA_READ); in bcm2835_request()
1208 if (host->use_sbc) { in bcm2835_request()
1209 if (bcm2835_send_command(host, mrq->sbc)) { in bcm2835_request()
1210 if (!host->use_busy) in bcm2835_request()
1211 bcm2835_finish_command(host); in bcm2835_request()
1213 } else if (mrq->cmd && bcm2835_send_command(host, mrq->cmd)) { in bcm2835_request()
1214 if (host->data && host->dma_desc) { in bcm2835_request()
1216 bcm2835_start_dma(host); in bcm2835_request()
1219 if (!host->use_busy) in bcm2835_request()
1220 bcm2835_finish_command(host); in bcm2835_request()
1223 mutex_unlock(&host->mutex); in bcm2835_request()
1228 struct bcm2835_host *host = mmc_priv(mmc); in bcm2835_set_ios() local
1230 mutex_lock(&host->mutex); in bcm2835_set_ios()
1232 if (!ios->clock || ios->clock != host->clock) { in bcm2835_set_ios()
1233 bcm2835_set_clock(host, ios->clock); in bcm2835_set_ios()
1234 host->clock = ios->clock; in bcm2835_set_ios()
1238 host->hcfg &= ~SDHCFG_WIDE_EXT_BUS; in bcm2835_set_ios()
1240 host->hcfg |= SDHCFG_WIDE_EXT_BUS; in bcm2835_set_ios()
1242 host->hcfg |= SDHCFG_WIDE_INT_BUS; in bcm2835_set_ios()
1245 host->hcfg |= SDHCFG_SLOW_CARD; in bcm2835_set_ios()
1247 writel(host->hcfg, host->ioaddr + SDHCFG); in bcm2835_set_ios()
1249 mutex_unlock(&host->mutex); in bcm2835_set_ios()
1258 static int bcm2835_add_host(struct bcm2835_host *host) in bcm2835_add_host() argument
1260 struct mmc_host *mmc = mmc_from_priv(host); in bcm2835_add_host()
1261 struct device *dev = &host->pdev->dev; in bcm2835_add_host()
1265 if (!mmc->f_max || mmc->f_max > host->max_clk) in bcm2835_add_host()
1266 mmc->f_max = host->max_clk; in bcm2835_add_host()
1267 mmc->f_min = host->max_clk / SDCDIV_MAX_CDIV; in bcm2835_add_host()
1274 /* host controller capabilities */ in bcm2835_add_host()
1278 spin_lock_init(&host->lock); in bcm2835_add_host()
1279 mutex_init(&host->mutex); in bcm2835_add_host()
1281 if (!host->dma_chan_rxtx) { in bcm2835_add_host()
1283 host->use_dma = false; in bcm2835_add_host()
1285 host->use_dma = true; in bcm2835_add_host()
1287 host->dma_cfg_tx.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; in bcm2835_add_host()
1288 host->dma_cfg_tx.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; in bcm2835_add_host()
1289 host->dma_cfg_tx.direction = DMA_MEM_TO_DEV; in bcm2835_add_host()
1290 host->dma_cfg_tx.src_addr = 0; in bcm2835_add_host()
1291 host->dma_cfg_tx.dst_addr = host->phys_addr + SDDATA; in bcm2835_add_host()
1293 host->dma_cfg_rx.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; in bcm2835_add_host()
1294 host->dma_cfg_rx.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; in bcm2835_add_host()
1295 host->dma_cfg_rx.direction = DMA_DEV_TO_MEM; in bcm2835_add_host()
1296 host->dma_cfg_rx.src_addr = host->phys_addr + SDDATA; in bcm2835_add_host()
1297 host->dma_cfg_rx.dst_addr = 0; in bcm2835_add_host()
1299 if (dmaengine_slave_config(host->dma_chan_rxtx, in bcm2835_add_host()
1300 &host->dma_cfg_tx) != 0 || in bcm2835_add_host()
1301 dmaengine_slave_config(host->dma_chan_rxtx, in bcm2835_add_host()
1302 &host->dma_cfg_rx) != 0) in bcm2835_add_host()
1303 host->use_dma = false; in bcm2835_add_host()
1315 INIT_WORK(&host->dma_work, bcm2835_dma_complete_work); in bcm2835_add_host()
1316 INIT_DELAYED_WORK(&host->timeout_work, bcm2835_timeout); in bcm2835_add_host()
1319 host->hcfg = SDHCFG_BUSY_IRPT_EN; in bcm2835_add_host()
1321 bcm2835_reset_internal(host); in bcm2835_add_host()
1323 ret = request_threaded_irq(host->irq, bcm2835_irq, in bcm2835_add_host()
1325 0, mmc_hostname(mmc), host); in bcm2835_add_host()
1327 dev_err(dev, "failed to request IRQ %d: %d\n", host->irq, ret); in bcm2835_add_host()
1333 free_irq(host->irq, host); in bcm2835_add_host()
1338 if (host->use_dma && (PIO_THRESHOLD > 0)) in bcm2835_add_host()
1341 host->use_dma ? "enabled" : "disabled", pio_limit_string); in bcm2835_add_host()
1348 struct bcm2835_host *host = dev_get_drvdata(dev); in bcm2835_suspend() local
1350 clk_disable_unprepare(host->clk); in bcm2835_suspend()
1357 struct bcm2835_host *host = dev_get_drvdata(dev); in bcm2835_resume() local
1359 return clk_prepare_enable(host->clk); in bcm2835_resume()
1368 struct bcm2835_host *host; in bcm2835_probe() local
1374 mmc = mmc_alloc_host(sizeof(*host), dev); in bcm2835_probe()
1379 host = mmc_priv(mmc); in bcm2835_probe()
1380 host->pdev = pdev; in bcm2835_probe()
1381 spin_lock_init(&host->lock); in bcm2835_probe()
1383 host->ioaddr = devm_platform_ioremap_resource(pdev, 0); in bcm2835_probe()
1384 if (IS_ERR(host->ioaddr)) { in bcm2835_probe()
1385 ret = PTR_ERR(host->ioaddr); in bcm2835_probe()
1399 host->phys_addr = be32_to_cpup(regaddr_p); in bcm2835_probe()
1401 host->dma_chan = NULL; in bcm2835_probe()
1402 host->dma_desc = NULL; in bcm2835_probe()
1404 host->dma_chan_rxtx = dma_request_chan(dev, "rx-tx"); in bcm2835_probe()
1405 if (IS_ERR(host->dma_chan_rxtx)) { in bcm2835_probe()
1406 ret = PTR_ERR(host->dma_chan_rxtx); in bcm2835_probe()
1407 host->dma_chan_rxtx = NULL; in bcm2835_probe()
1415 host->irq = platform_get_irq(pdev, 0); in bcm2835_probe()
1416 if (host->irq < 0) { in bcm2835_probe()
1417 ret = host->irq; in bcm2835_probe()
1425 host->clk = devm_clk_get(dev, NULL); in bcm2835_probe()
1426 if (IS_ERR(host->clk)) { in bcm2835_probe()
1427 ret = dev_err_probe(dev, PTR_ERR(host->clk), "could not get clk\n"); in bcm2835_probe()
1431 ret = clk_prepare_enable(host->clk); in bcm2835_probe()
1435 host->max_clk = clk_get_rate(host->clk); in bcm2835_probe()
1437 ret = bcm2835_add_host(host); in bcm2835_probe()
1441 platform_set_drvdata(pdev, host); in bcm2835_probe()
1448 clk_disable_unprepare(host->clk); in bcm2835_probe()
1451 if (host->dma_chan_rxtx) in bcm2835_probe()
1452 dma_release_channel(host->dma_chan_rxtx); in bcm2835_probe()
1460 struct bcm2835_host *host = platform_get_drvdata(pdev); in bcm2835_remove() local
1461 struct mmc_host *mmc = mmc_from_priv(host); in bcm2835_remove()
1465 writel(SDVDD_POWER_OFF, host->ioaddr + SDVDD); in bcm2835_remove()
1467 free_irq(host->irq, host); in bcm2835_remove()
1469 cancel_work_sync(&host->dma_work); in bcm2835_remove()
1470 cancel_delayed_work_sync(&host->timeout_work); in bcm2835_remove()
1472 clk_disable_unprepare(host->clk); in bcm2835_remove()
1474 if (host->dma_chan_rxtx) in bcm2835_remove()
1475 dma_release_channel(host->dma_chan_rxtx); in bcm2835_remove()