Lines Matching full:host
59 #include <linux/mmc/host.h>
71 #define SDHSTS 0x20 /* SD host status - 11 R/W */
74 #define SDHCFG 0x38 /* Host configuration - 2 R/W */
75 #define SDHBCT 0x3c /* Host byte count (debug) - 32 R/W */
77 #define SDHBLC 0x50 /* Host block count (SDIO/SDHC) - 9 R/W */
204 static void bcm2835_dumpcmd(struct bcm2835_host *host, struct mmc_command *cmd, in bcm2835_dumpcmd() argument
207 struct device *dev = &host->pdev->dev; in bcm2835_dumpcmd()
213 (cmd == host->cmd) ? '>' : ' ', in bcm2835_dumpcmd()
219 static void bcm2835_dumpregs(struct bcm2835_host *host) in bcm2835_dumpregs() argument
221 struct mmc_request *mrq = host->mrq; in bcm2835_dumpregs()
222 struct device *dev = &host->pdev->dev; in bcm2835_dumpregs()
225 bcm2835_dumpcmd(host, mrq->sbc, "sbc"); in bcm2835_dumpregs()
226 bcm2835_dumpcmd(host, mrq->cmd, "cmd"); in bcm2835_dumpregs()
233 bcm2835_dumpcmd(host, mrq->stop, "stop"); in bcm2835_dumpregs()
237 dev_dbg(dev, "SDCMD 0x%08x\n", readl(host->ioaddr + SDCMD)); in bcm2835_dumpregs()
238 dev_dbg(dev, "SDARG 0x%08x\n", readl(host->ioaddr + SDARG)); in bcm2835_dumpregs()
239 dev_dbg(dev, "SDTOUT 0x%08x\n", readl(host->ioaddr + SDTOUT)); in bcm2835_dumpregs()
240 dev_dbg(dev, "SDCDIV 0x%08x\n", readl(host->ioaddr + SDCDIV)); in bcm2835_dumpregs()
241 dev_dbg(dev, "SDRSP0 0x%08x\n", readl(host->ioaddr + SDRSP0)); in bcm2835_dumpregs()
242 dev_dbg(dev, "SDRSP1 0x%08x\n", readl(host->ioaddr + SDRSP1)); in bcm2835_dumpregs()
243 dev_dbg(dev, "SDRSP2 0x%08x\n", readl(host->ioaddr + SDRSP2)); in bcm2835_dumpregs()
244 dev_dbg(dev, "SDRSP3 0x%08x\n", readl(host->ioaddr + SDRSP3)); in bcm2835_dumpregs()
245 dev_dbg(dev, "SDHSTS 0x%08x\n", readl(host->ioaddr + SDHSTS)); in bcm2835_dumpregs()
246 dev_dbg(dev, "SDVDD 0x%08x\n", readl(host->ioaddr + SDVDD)); in bcm2835_dumpregs()
247 dev_dbg(dev, "SDEDM 0x%08x\n", readl(host->ioaddr + SDEDM)); in bcm2835_dumpregs()
248 dev_dbg(dev, "SDHCFG 0x%08x\n", readl(host->ioaddr + SDHCFG)); in bcm2835_dumpregs()
249 dev_dbg(dev, "SDHBCT 0x%08x\n", readl(host->ioaddr + SDHBCT)); in bcm2835_dumpregs()
250 dev_dbg(dev, "SDHBLC 0x%08x\n", readl(host->ioaddr + SDHBLC)); in bcm2835_dumpregs()
254 static void bcm2835_reset_internal(struct bcm2835_host *host) in bcm2835_reset_internal() argument
258 writel(SDVDD_POWER_OFF, host->ioaddr + SDVDD); in bcm2835_reset_internal()
259 writel(0, host->ioaddr + SDCMD); in bcm2835_reset_internal()
260 writel(0, host->ioaddr + SDARG); in bcm2835_reset_internal()
261 writel(0xf00000, host->ioaddr + SDTOUT); in bcm2835_reset_internal()
262 writel(0, host->ioaddr + SDCDIV); in bcm2835_reset_internal()
263 writel(0x7f8, host->ioaddr + SDHSTS); /* Write 1s to clear */ in bcm2835_reset_internal()
264 writel(0, host->ioaddr + SDHCFG); in bcm2835_reset_internal()
265 writel(0, host->ioaddr + SDHBCT); in bcm2835_reset_internal()
266 writel(0, host->ioaddr + SDHBLC); in bcm2835_reset_internal()
269 temp = readl(host->ioaddr + SDEDM); in bcm2835_reset_internal()
274 writel(temp, host->ioaddr + SDEDM); in bcm2835_reset_internal()
276 writel(SDVDD_POWER_ON, host->ioaddr + SDVDD); in bcm2835_reset_internal()
278 host->clock = 0; in bcm2835_reset_internal()
279 writel(host->hcfg, host->ioaddr + SDHCFG); in bcm2835_reset_internal()
280 writel(host->cdiv, host->ioaddr + SDCDIV); in bcm2835_reset_internal()
285 struct bcm2835_host *host = mmc_priv(mmc); in bcm2835_reset() local
287 if (host->dma_chan) in bcm2835_reset()
288 dmaengine_terminate_sync(host->dma_chan); in bcm2835_reset()
289 host->dma_chan = NULL; in bcm2835_reset()
290 bcm2835_reset_internal(host); in bcm2835_reset()
293 static void bcm2835_finish_command(struct bcm2835_host *host);
295 static void bcm2835_wait_transfer_complete(struct bcm2835_host *host) in bcm2835_wait_transfer_complete() argument
300 alternate_idle = (host->mrq->data->flags & MMC_DATA_READ) ? in bcm2835_wait_transfer_complete()
308 edm = readl(host->ioaddr + SDEDM); in bcm2835_wait_transfer_complete()
316 host->ioaddr + SDEDM); in bcm2835_wait_transfer_complete()
322 dev_err(&host->pdev->dev, in bcm2835_wait_transfer_complete()
325 bcm2835_dumpregs(host); in bcm2835_wait_transfer_complete()
326 host->mrq->data->error = -ETIMEDOUT; in bcm2835_wait_transfer_complete()
335 struct bcm2835_host *host = param; in bcm2835_dma_complete() local
337 schedule_work(&host->dma_work); in bcm2835_dma_complete()
340 static void bcm2835_transfer_block_pio(struct bcm2835_host *host, bool is_read) in bcm2835_transfer_block_pio() argument
346 blksize = host->data->blksz; in bcm2835_transfer_block_pio()
358 if (!sg_miter_next(&host->sg_miter)) { in bcm2835_transfer_block_pio()
359 host->data->error = -EINVAL; in bcm2835_transfer_block_pio()
363 len = min(host->sg_miter.length, blksize); in bcm2835_transfer_block_pio()
365 host->data->error = -EINVAL; in bcm2835_transfer_block_pio()
370 host->sg_miter.consumed = len; in bcm2835_transfer_block_pio()
372 buf = (u32 *)host->sg_miter.addr; in bcm2835_transfer_block_pio()
381 edm = readl(host->ioaddr + SDEDM); in bcm2835_transfer_block_pio()
389 struct device *dev = &host->pdev->dev; in bcm2835_transfer_block_pio()
399 hsts = readl(host->ioaddr + SDHSTS); in bcm2835_transfer_block_pio()
414 host->ns_per_fifo_word); in bcm2835_transfer_block_pio()
424 *(buf++) = readl(host->ioaddr + SDDATA); in bcm2835_transfer_block_pio()
426 writel(*(buf++), host->ioaddr + SDDATA); in bcm2835_transfer_block_pio()
435 sg_miter_stop(&host->sg_miter); in bcm2835_transfer_block_pio()
440 static void bcm2835_transfer_pio(struct bcm2835_host *host) in bcm2835_transfer_pio() argument
442 struct device *dev = &host->pdev->dev; in bcm2835_transfer_pio()
446 is_read = (host->data->flags & MMC_DATA_READ) != 0; in bcm2835_transfer_pio()
447 bcm2835_transfer_block_pio(host, is_read); in bcm2835_transfer_pio()
449 sdhsts = readl(host->ioaddr + SDHSTS); in bcm2835_transfer_pio()
455 host->data->error = -EILSEQ; in bcm2835_transfer_pio()
460 host->data->error = -ETIMEDOUT; in bcm2835_transfer_pio()
465 void bcm2835_prepare_dma(struct bcm2835_host *host, struct mmc_data *data) in bcm2835_prepare_dma() argument
471 dma_chan = host->dma_chan_rxtx; in bcm2835_prepare_dma()
487 host->drain_words = 0; in bcm2835_prepare_dma()
500 host->drain_page = sg_page(sg); in bcm2835_prepare_dma()
501 host->drain_offset = sg->offset + sg->length; in bcm2835_prepare_dma()
504 host->drain_words = len / 4; in bcm2835_prepare_dma()
510 &host->dma_cfg_rx : in bcm2835_prepare_dma()
511 &host->dma_cfg_tx); in bcm2835_prepare_dma()
525 desc->callback_param = host; in bcm2835_prepare_dma()
526 host->dma_desc = desc; in bcm2835_prepare_dma()
527 host->dma_chan = dma_chan; in bcm2835_prepare_dma()
528 host->dma_dir = dir_data; in bcm2835_prepare_dma()
532 static void bcm2835_start_dma(struct bcm2835_host *host) in bcm2835_start_dma() argument
534 dmaengine_submit(host->dma_desc); in bcm2835_start_dma()
535 dma_async_issue_pending(host->dma_chan); in bcm2835_start_dma()
538 static void bcm2835_set_transfer_irqs(struct bcm2835_host *host) in bcm2835_set_transfer_irqs() argument
543 if (host->dma_desc) { in bcm2835_set_transfer_irqs()
544 host->hcfg = (host->hcfg & ~all_irqs) | in bcm2835_set_transfer_irqs()
547 host->hcfg = (host->hcfg & ~all_irqs) | in bcm2835_set_transfer_irqs()
552 writel(host->hcfg, host->ioaddr + SDHCFG); in bcm2835_set_transfer_irqs()
556 void bcm2835_prepare_data(struct bcm2835_host *host, struct mmc_command *cmd) in bcm2835_prepare_data() argument
560 WARN_ON(host->data); in bcm2835_prepare_data()
562 host->data = data; in bcm2835_prepare_data()
566 host->data_complete = false; in bcm2835_prepare_data()
567 host->data->bytes_xfered = 0; in bcm2835_prepare_data()
569 if (!host->dma_desc) { in bcm2835_prepare_data()
577 sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); in bcm2835_prepare_data()
578 host->blocks = data->blocks; in bcm2835_prepare_data()
581 bcm2835_set_transfer_irqs(host); in bcm2835_prepare_data()
583 writel(data->blksz, host->ioaddr + SDHBCT); in bcm2835_prepare_data()
584 writel(data->blocks, host->ioaddr + SDHBLC); in bcm2835_prepare_data()
587 static u32 bcm2835_read_wait_sdcmd(struct bcm2835_host *host, u32 max_ms) in bcm2835_read_wait_sdcmd() argument
589 struct device *dev = &host->pdev->dev; in bcm2835_read_wait_sdcmd()
593 ret = readl_poll_timeout(host->ioaddr + SDCMD, value, in bcm2835_read_wait_sdcmd()
597 ret = readl_poll_timeout(host->ioaddr + SDCMD, value, in bcm2835_read_wait_sdcmd()
606 static void bcm2835_finish_request(struct bcm2835_host *host) in bcm2835_finish_request() argument
611 cancel_delayed_work(&host->timeout_work); in bcm2835_finish_request()
613 mrq = host->mrq; in bcm2835_finish_request()
615 host->mrq = NULL; in bcm2835_finish_request()
616 host->cmd = NULL; in bcm2835_finish_request()
617 host->data = NULL; in bcm2835_finish_request()
619 host->dma_desc = NULL; in bcm2835_finish_request()
620 terminate_chan = host->dma_chan; in bcm2835_finish_request()
621 host->dma_chan = NULL; in bcm2835_finish_request()
627 dev_err(&host->pdev->dev, in bcm2835_finish_request()
631 mmc_request_done(host->mmc, mrq); in bcm2835_finish_request()
635 bool bcm2835_send_command(struct bcm2835_host *host, struct mmc_command *cmd) in bcm2835_send_command() argument
637 struct device *dev = &host->pdev->dev; in bcm2835_send_command()
641 WARN_ON(host->cmd); in bcm2835_send_command()
643 sdcmd = bcm2835_read_wait_sdcmd(host, 100); in bcm2835_send_command()
646 bcm2835_dumpregs(host); in bcm2835_send_command()
648 bcm2835_finish_request(host); in bcm2835_send_command()
656 schedule_delayed_work(&host->timeout_work, timeout); in bcm2835_send_command()
658 host->cmd = cmd; in bcm2835_send_command()
661 sdhsts = readl(host->ioaddr + SDHSTS); in bcm2835_send_command()
663 writel(sdhsts, host->ioaddr + SDHSTS); in bcm2835_send_command()
668 bcm2835_finish_request(host); in bcm2835_send_command()
672 bcm2835_prepare_data(host, cmd); in bcm2835_send_command()
674 writel(cmd->arg, host->ioaddr + SDARG); in bcm2835_send_command()
678 host->use_busy = false; in bcm2835_send_command()
686 host->use_busy = true; in bcm2835_send_command()
697 writel(sdcmd | SDCMD_NEW_FLAG, host->ioaddr + SDCMD); in bcm2835_send_command()
702 static void bcm2835_transfer_complete(struct bcm2835_host *host) in bcm2835_transfer_complete() argument
706 WARN_ON(!host->data_complete); in bcm2835_transfer_complete()
708 data = host->data; in bcm2835_transfer_complete()
709 host->data = NULL; in bcm2835_transfer_complete()
715 if (host->mrq->stop && (data->error || !host->use_sbc)) { in bcm2835_transfer_complete()
716 if (bcm2835_send_command(host, host->mrq->stop)) { in bcm2835_transfer_complete()
718 if (!host->use_busy) in bcm2835_transfer_complete()
719 bcm2835_finish_command(host); in bcm2835_transfer_complete()
722 bcm2835_wait_transfer_complete(host); in bcm2835_transfer_complete()
723 bcm2835_finish_request(host); in bcm2835_transfer_complete()
727 static void bcm2835_finish_data(struct bcm2835_host *host) in bcm2835_finish_data() argument
729 struct device *dev = &host->pdev->dev; in bcm2835_finish_data()
732 data = host->data; in bcm2835_finish_data()
734 host->hcfg &= ~(SDHCFG_DATA_IRPT_EN | SDHCFG_BLOCK_IRPT_EN); in bcm2835_finish_data()
735 writel(host->hcfg, host->ioaddr + SDHCFG); in bcm2835_finish_data()
739 host->data_complete = true; in bcm2835_finish_data()
741 if (host->cmd) { in bcm2835_finish_data()
747 readl(host->ioaddr + SDHSTS)); in bcm2835_finish_data()
749 bcm2835_transfer_complete(host); in bcm2835_finish_data()
753 static void bcm2835_finish_command(struct bcm2835_host *host) in bcm2835_finish_command() argument
755 struct device *dev = &host->pdev->dev; in bcm2835_finish_command()
756 struct mmc_command *cmd = host->cmd; in bcm2835_finish_command()
759 sdcmd = bcm2835_read_wait_sdcmd(host, 100); in bcm2835_finish_command()
764 bcm2835_dumpregs(host); in bcm2835_finish_command()
765 host->cmd->error = -EIO; in bcm2835_finish_command()
766 bcm2835_finish_request(host); in bcm2835_finish_command()
769 u32 sdhsts = readl(host->ioaddr + SDHSTS); in bcm2835_finish_command()
772 writel(SDHSTS_ERROR_MASK, host->ioaddr + SDHSTS); in bcm2835_finish_command()
775 (host->cmd->opcode != MMC_SEND_OP_COND)) { in bcm2835_finish_command()
779 host->cmd->error = -ETIMEDOUT; in bcm2835_finish_command()
782 host->cmd->opcode); in bcm2835_finish_command()
783 bcm2835_dumpregs(host); in bcm2835_finish_command()
784 host->cmd->error = -EILSEQ; in bcm2835_finish_command()
786 edm = readl(host->ioaddr + SDEDM); in bcm2835_finish_command()
792 host->ioaddr + SDEDM); in bcm2835_finish_command()
793 bcm2835_finish_request(host); in bcm2835_finish_command()
804 readl(host->ioaddr + SDRSP0 + i * 4); in bcm2835_finish_command()
807 cmd->resp[0] = readl(host->ioaddr + SDRSP0); in bcm2835_finish_command()
811 if (cmd == host->mrq->sbc) { in bcm2835_finish_command()
813 host->cmd = NULL; in bcm2835_finish_command()
814 if (bcm2835_send_command(host, host->mrq->cmd)) { in bcm2835_finish_command()
815 if (host->data && host->dma_desc) in bcm2835_finish_command()
819 bcm2835_start_dma(host); in bcm2835_finish_command()
821 if (!host->use_busy) in bcm2835_finish_command()
822 bcm2835_finish_command(host); in bcm2835_finish_command()
824 } else if (cmd == host->mrq->stop) { in bcm2835_finish_command()
826 bcm2835_finish_request(host); in bcm2835_finish_command()
829 host->cmd = NULL; in bcm2835_finish_command()
830 if (!host->data) in bcm2835_finish_command()
831 bcm2835_finish_request(host); in bcm2835_finish_command()
832 else if (host->data_complete) in bcm2835_finish_command()
833 bcm2835_transfer_complete(host); in bcm2835_finish_command()
840 struct bcm2835_host *host = in bcm2835_timeout() local
842 struct device *dev = &host->pdev->dev; in bcm2835_timeout()
844 mutex_lock(&host->mutex); in bcm2835_timeout()
846 if (host->mrq) { in bcm2835_timeout()
848 bcm2835_dumpregs(host); in bcm2835_timeout()
850 bcm2835_reset(host->mmc); in bcm2835_timeout()
852 if (host->data) { in bcm2835_timeout()
853 host->data->error = -ETIMEDOUT; in bcm2835_timeout()
854 bcm2835_finish_data(host); in bcm2835_timeout()
856 if (host->cmd) in bcm2835_timeout()
857 host->cmd->error = -ETIMEDOUT; in bcm2835_timeout()
859 host->mrq->cmd->error = -ETIMEDOUT; in bcm2835_timeout()
861 bcm2835_finish_request(host); in bcm2835_timeout()
865 mutex_unlock(&host->mutex); in bcm2835_timeout()
868 static bool bcm2835_check_cmd_error(struct bcm2835_host *host, u32 intmask) in bcm2835_check_cmd_error() argument
870 struct device *dev = &host->pdev->dev; in bcm2835_check_cmd_error()
875 if (!host->cmd) in bcm2835_check_cmd_error()
880 host->cmd->error = -EILSEQ; in bcm2835_check_cmd_error()
883 if (host->mrq->data) in bcm2835_check_cmd_error()
884 host->mrq->data->error = -EILSEQ; in bcm2835_check_cmd_error()
886 host->cmd->error = -EILSEQ; in bcm2835_check_cmd_error()
888 if (host->mrq->data) in bcm2835_check_cmd_error()
889 host->mrq->data->error = -ETIMEDOUT; in bcm2835_check_cmd_error()
891 host->cmd->error = -ETIMEDOUT; in bcm2835_check_cmd_error()
893 host->cmd->error = -ETIMEDOUT; in bcm2835_check_cmd_error()
895 bcm2835_dumpregs(host); in bcm2835_check_cmd_error()
899 static void bcm2835_check_data_error(struct bcm2835_host *host, u32 intmask) in bcm2835_check_data_error() argument
901 if (!host->data) in bcm2835_check_data_error()
904 host->data->error = -EILSEQ; in bcm2835_check_data_error()
906 host->data->error = -ETIMEDOUT; in bcm2835_check_data_error()
909 static void bcm2835_busy_irq(struct bcm2835_host *host) in bcm2835_busy_irq() argument
911 if (WARN_ON(!host->cmd)) { in bcm2835_busy_irq()
912 bcm2835_dumpregs(host); in bcm2835_busy_irq()
916 if (WARN_ON(!host->use_busy)) { in bcm2835_busy_irq()
917 bcm2835_dumpregs(host); in bcm2835_busy_irq()
920 host->use_busy = false; in bcm2835_busy_irq()
922 bcm2835_finish_command(host); in bcm2835_busy_irq()
925 static void bcm2835_data_irq(struct bcm2835_host *host, u32 intmask) in bcm2835_data_irq() argument
933 if (!host->data) in bcm2835_data_irq()
936 bcm2835_check_data_error(host, intmask); in bcm2835_data_irq()
937 if (host->data->error) in bcm2835_data_irq()
940 if (host->data->flags & MMC_DATA_WRITE) { in bcm2835_data_irq()
942 host->hcfg &= ~(SDHCFG_DATA_IRPT_EN); in bcm2835_data_irq()
943 host->hcfg |= SDHCFG_BLOCK_IRPT_EN; in bcm2835_data_irq()
944 writel(host->hcfg, host->ioaddr + SDHCFG); in bcm2835_data_irq()
945 bcm2835_transfer_pio(host); in bcm2835_data_irq()
947 bcm2835_transfer_pio(host); in bcm2835_data_irq()
948 host->blocks--; in bcm2835_data_irq()
949 if ((host->blocks == 0) || host->data->error) in bcm2835_data_irq()
955 host->hcfg &= ~(SDHCFG_DATA_IRPT_EN | SDHCFG_BLOCK_IRPT_EN); in bcm2835_data_irq()
956 writel(host->hcfg, host->ioaddr + SDHCFG); in bcm2835_data_irq()
959 static void bcm2835_data_threaded_irq(struct bcm2835_host *host) in bcm2835_data_threaded_irq() argument
961 if (!host->data) in bcm2835_data_threaded_irq()
963 if ((host->blocks == 0) || host->data->error) in bcm2835_data_threaded_irq()
964 bcm2835_finish_data(host); in bcm2835_data_threaded_irq()
967 static void bcm2835_block_irq(struct bcm2835_host *host) in bcm2835_block_irq() argument
969 if (WARN_ON(!host->data)) { in bcm2835_block_irq()
970 bcm2835_dumpregs(host); in bcm2835_block_irq()
974 if (!host->dma_desc) { in bcm2835_block_irq()
975 WARN_ON(!host->blocks); in bcm2835_block_irq()
976 if (host->data->error || (--host->blocks == 0)) in bcm2835_block_irq()
977 bcm2835_finish_data(host); in bcm2835_block_irq()
979 bcm2835_transfer_pio(host); in bcm2835_block_irq()
980 } else if (host->data->flags & MMC_DATA_WRITE) { in bcm2835_block_irq()
981 bcm2835_finish_data(host); in bcm2835_block_irq()
988 struct bcm2835_host *host = dev_id; in bcm2835_irq() local
991 spin_lock(&host->lock); in bcm2835_irq()
993 intmask = readl(host->ioaddr + SDHSTS); in bcm2835_irq()
999 host->ioaddr + SDHSTS); in bcm2835_irq()
1002 bcm2835_check_data_error(host, intmask); in bcm2835_irq()
1003 host->irq_block = true; in bcm2835_irq()
1008 if (!bcm2835_check_cmd_error(host, intmask)) { in bcm2835_irq()
1009 host->irq_busy = true; in bcm2835_irq()
1021 (host->hcfg & SDHCFG_DATA_IRPT_EN)) { in bcm2835_irq()
1022 bcm2835_data_irq(host, intmask); in bcm2835_irq()
1023 host->irq_data = true; in bcm2835_irq()
1027 spin_unlock(&host->lock); in bcm2835_irq()
1034 struct bcm2835_host *host = dev_id; in bcm2835_threaded_irq() local
1038 spin_lock_irqsave(&host->lock, flags); in bcm2835_threaded_irq()
1040 block = host->irq_block; in bcm2835_threaded_irq()
1041 busy = host->irq_busy; in bcm2835_threaded_irq()
1042 data = host->irq_data; in bcm2835_threaded_irq()
1043 host->irq_block = false; in bcm2835_threaded_irq()
1044 host->irq_busy = false; in bcm2835_threaded_irq()
1045 host->irq_data = false; in bcm2835_threaded_irq()
1047 spin_unlock_irqrestore(&host->lock, flags); in bcm2835_threaded_irq()
1049 mutex_lock(&host->mutex); in bcm2835_threaded_irq()
1052 bcm2835_block_irq(host); in bcm2835_threaded_irq()
1054 bcm2835_busy_irq(host); in bcm2835_threaded_irq()
1056 bcm2835_data_threaded_irq(host); in bcm2835_threaded_irq()
1058 mutex_unlock(&host->mutex); in bcm2835_threaded_irq()
1065 struct bcm2835_host *host = in bcm2835_dma_complete_work() local
1067 struct mmc_data *data = host->data; in bcm2835_dma_complete_work()
1069 mutex_lock(&host->mutex); in bcm2835_dma_complete_work()
1071 if (host->dma_chan) { in bcm2835_dma_complete_work()
1072 dma_unmap_sg(host->dma_chan->device->dev, in bcm2835_dma_complete_work()
1074 host->dma_dir); in bcm2835_dma_complete_work()
1076 host->dma_chan = NULL; in bcm2835_dma_complete_work()
1079 if (host->drain_words) { in bcm2835_dma_complete_work()
1084 if (host->drain_offset & PAGE_MASK) { in bcm2835_dma_complete_work()
1085 host->drain_page += host->drain_offset >> PAGE_SHIFT; in bcm2835_dma_complete_work()
1086 host->drain_offset &= ~PAGE_MASK; in bcm2835_dma_complete_work()
1089 page = kmap_atomic(host->drain_page); in bcm2835_dma_complete_work()
1090 buf = page + host->drain_offset; in bcm2835_dma_complete_work()
1092 while (host->drain_words) { in bcm2835_dma_complete_work()
1093 u32 edm = readl(host->ioaddr + SDEDM); in bcm2835_dma_complete_work()
1096 *(buf++) = readl(host->ioaddr + SDDATA); in bcm2835_dma_complete_work()
1097 host->drain_words--; in bcm2835_dma_complete_work()
1104 bcm2835_finish_data(host); in bcm2835_dma_complete_work()
1106 mutex_unlock(&host->mutex); in bcm2835_dma_complete_work()
1109 static void bcm2835_set_clock(struct bcm2835_host *host, unsigned int clock) in bcm2835_set_clock() argument
1138 host->cdiv = SDCDIV_MAX_CDIV; in bcm2835_set_clock()
1139 writel(host->cdiv, host->ioaddr + SDCDIV); in bcm2835_set_clock()
1143 div = host->max_clk / clock; in bcm2835_set_clock()
1146 if ((host->max_clk / div) > clock) in bcm2835_set_clock()
1153 clock = host->max_clk / (div + 2); in bcm2835_set_clock()
1154 host->mmc->actual_clock = clock; in bcm2835_set_clock()
1158 host->ns_per_fifo_word = (1000000000 / clock) * in bcm2835_set_clock()
1159 ((host->mmc->caps & MMC_CAP_4_BIT_DATA) ? 8 : 32); in bcm2835_set_clock()
1161 host->cdiv = div; in bcm2835_set_clock()
1162 writel(host->cdiv, host->ioaddr + SDCDIV); in bcm2835_set_clock()
1165 writel(host->mmc->actual_clock / 2, host->ioaddr + SDTOUT); in bcm2835_set_clock()
1170 struct bcm2835_host *host = mmc_priv(mmc); in bcm2835_request() local
1171 struct device *dev = &host->pdev->dev; in bcm2835_request()
1195 if (host->use_dma && mrq->data && (mrq->data->blocks > PIO_THRESHOLD)) in bcm2835_request()
1196 bcm2835_prepare_dma(host, mrq->data); in bcm2835_request()
1198 mutex_lock(&host->mutex); in bcm2835_request()
1200 WARN_ON(host->mrq); in bcm2835_request()
1201 host->mrq = mrq; in bcm2835_request()
1203 edm = readl(host->ioaddr + SDEDM); in bcm2835_request()
1209 readl(host->ioaddr + SDCMD) & SDCMD_CMD_MASK, in bcm2835_request()
1211 bcm2835_dumpregs(host); in bcm2835_request()
1216 bcm2835_finish_request(host); in bcm2835_request()
1217 mutex_unlock(&host->mutex); in bcm2835_request()
1221 host->use_sbc = !!mrq->sbc && host->mrq->data && in bcm2835_request()
1222 (host->mrq->data->flags & MMC_DATA_READ); in bcm2835_request()
1223 if (host->use_sbc) { in bcm2835_request()
1224 if (bcm2835_send_command(host, mrq->sbc)) { in bcm2835_request()
1225 if (!host->use_busy) in bcm2835_request()
1226 bcm2835_finish_command(host); in bcm2835_request()
1228 } else if (mrq->cmd && bcm2835_send_command(host, mrq->cmd)) { in bcm2835_request()
1229 if (host->data && host->dma_desc) { in bcm2835_request()
1231 bcm2835_start_dma(host); in bcm2835_request()
1234 if (!host->use_busy) in bcm2835_request()
1235 bcm2835_finish_command(host); in bcm2835_request()
1238 mutex_unlock(&host->mutex); in bcm2835_request()
1243 struct bcm2835_host *host = mmc_priv(mmc); in bcm2835_set_ios() local
1245 mutex_lock(&host->mutex); in bcm2835_set_ios()
1247 if (!ios->clock || ios->clock != host->clock) { in bcm2835_set_ios()
1248 bcm2835_set_clock(host, ios->clock); in bcm2835_set_ios()
1249 host->clock = ios->clock; in bcm2835_set_ios()
1253 host->hcfg &= ~SDHCFG_WIDE_EXT_BUS; in bcm2835_set_ios()
1255 host->hcfg |= SDHCFG_WIDE_EXT_BUS; in bcm2835_set_ios()
1257 host->hcfg |= SDHCFG_WIDE_INT_BUS; in bcm2835_set_ios()
1260 host->hcfg |= SDHCFG_SLOW_CARD; in bcm2835_set_ios()
1262 writel(host->hcfg, host->ioaddr + SDHCFG); in bcm2835_set_ios()
1264 mutex_unlock(&host->mutex); in bcm2835_set_ios()
1273 static int bcm2835_add_host(struct bcm2835_host *host) in bcm2835_add_host() argument
1275 struct mmc_host *mmc = host->mmc; in bcm2835_add_host()
1276 struct device *dev = &host->pdev->dev; in bcm2835_add_host()
1280 if (!mmc->f_max || mmc->f_max > host->max_clk) in bcm2835_add_host()
1281 mmc->f_max = host->max_clk; in bcm2835_add_host()
1282 mmc->f_min = host->max_clk / SDCDIV_MAX_CDIV; in bcm2835_add_host()
1289 /* host controller capabilities */ in bcm2835_add_host()
1294 spin_lock_init(&host->lock); in bcm2835_add_host()
1295 mutex_init(&host->mutex); in bcm2835_add_host()
1297 if (IS_ERR_OR_NULL(host->dma_chan_rxtx)) { in bcm2835_add_host()
1299 host->use_dma = false; in bcm2835_add_host()
1301 host->use_dma = true; in bcm2835_add_host()
1303 host->dma_cfg_tx.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; in bcm2835_add_host()
1304 host->dma_cfg_tx.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; in bcm2835_add_host()
1305 host->dma_cfg_tx.slave_id = 13; /* DREQ channel */ in bcm2835_add_host()
1306 host->dma_cfg_tx.direction = DMA_MEM_TO_DEV; in bcm2835_add_host()
1307 host->dma_cfg_tx.src_addr = 0; in bcm2835_add_host()
1308 host->dma_cfg_tx.dst_addr = host->phys_addr + SDDATA; in bcm2835_add_host()
1310 host->dma_cfg_rx.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; in bcm2835_add_host()
1311 host->dma_cfg_rx.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; in bcm2835_add_host()
1312 host->dma_cfg_rx.slave_id = 13; /* DREQ channel */ in bcm2835_add_host()
1313 host->dma_cfg_rx.direction = DMA_DEV_TO_MEM; in bcm2835_add_host()
1314 host->dma_cfg_rx.src_addr = host->phys_addr + SDDATA; in bcm2835_add_host()
1315 host->dma_cfg_rx.dst_addr = 0; in bcm2835_add_host()
1317 if (dmaengine_slave_config(host->dma_chan_rxtx, in bcm2835_add_host()
1318 &host->dma_cfg_tx) != 0 || in bcm2835_add_host()
1319 dmaengine_slave_config(host->dma_chan_rxtx, in bcm2835_add_host()
1320 &host->dma_cfg_rx) != 0) in bcm2835_add_host()
1321 host->use_dma = false; in bcm2835_add_host()
1333 INIT_WORK(&host->dma_work, bcm2835_dma_complete_work); in bcm2835_add_host()
1334 INIT_DELAYED_WORK(&host->timeout_work, bcm2835_timeout); in bcm2835_add_host()
1337 host->hcfg = SDHCFG_BUSY_IRPT_EN; in bcm2835_add_host()
1339 bcm2835_reset_internal(host); in bcm2835_add_host()
1341 ret = request_threaded_irq(host->irq, bcm2835_irq, in bcm2835_add_host()
1343 0, mmc_hostname(mmc), host); in bcm2835_add_host()
1345 dev_err(dev, "failed to request IRQ %d: %d\n", host->irq, ret); in bcm2835_add_host()
1351 free_irq(host->irq, host); in bcm2835_add_host()
1356 if (host->use_dma && (PIO_THRESHOLD > 0)) in bcm2835_add_host()
1359 host->use_dma ? "enabled" : "disabled", pio_limit_string); in bcm2835_add_host()
1369 struct bcm2835_host *host; in bcm2835_probe() local
1375 mmc = mmc_alloc_host(sizeof(*host), dev); in bcm2835_probe()
1380 host = mmc_priv(mmc); in bcm2835_probe()
1381 host->mmc = mmc; in bcm2835_probe()
1382 host->pdev = pdev; in bcm2835_probe()
1383 spin_lock_init(&host->lock); in bcm2835_probe()
1386 host->ioaddr = devm_ioremap_resource(dev, iomem); in bcm2835_probe()
1387 if (IS_ERR(host->ioaddr)) { in bcm2835_probe()
1388 ret = PTR_ERR(host->ioaddr); in bcm2835_probe()
1402 host->phys_addr = be32_to_cpup(regaddr_p); in bcm2835_probe()
1404 host->dma_chan = NULL; in bcm2835_probe()
1405 host->dma_desc = NULL; in bcm2835_probe()
1407 host->dma_chan_rxtx = dma_request_slave_channel(dev, "rx-tx"); in bcm2835_probe()
1417 host->max_clk = clk_get_rate(clk); in bcm2835_probe()
1419 host->irq = platform_get_irq(pdev, 0); in bcm2835_probe()
1420 if (host->irq <= 0) { in bcm2835_probe()
1430 ret = bcm2835_add_host(host); in bcm2835_probe()
1434 platform_set_drvdata(pdev, host); in bcm2835_probe()
1442 if (host->dma_chan_rxtx) in bcm2835_probe()
1443 dma_release_channel(host->dma_chan_rxtx); in bcm2835_probe()
1451 struct bcm2835_host *host = platform_get_drvdata(pdev); in bcm2835_remove() local
1453 mmc_remove_host(host->mmc); in bcm2835_remove()
1455 writel(SDVDD_POWER_OFF, host->ioaddr + SDVDD); in bcm2835_remove()
1457 free_irq(host->irq, host); in bcm2835_remove()
1459 cancel_work_sync(&host->dma_work); in bcm2835_remove()
1460 cancel_delayed_work_sync(&host->timeout_work); in bcm2835_remove()
1462 mmc_free_host(host->mmc); in bcm2835_remove()