Lines Matching +full:no +full:- +full:mmc
1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/drivers/mmc/s3cmci.h - Samsung S3C MCI driver
5 * Copyright (C) 2004-2006 maintech GmbH, Thomas Kleffel <tk@maintech.de>
8 * Copyright (C) 2008 Simtec Electronics <ben-linux@fluff.org>
13 #include <linux/dma-mapping.h>
15 #include <linux/mmc/host.h>
26 #include <linux/mmc/slot-gpio.h>
27 #include <linux/platform_data/mmc-s3cmci.h>
31 #define DRIVER_NAME "s3c-mci"
133 dev_err(&host->pdev->dev, args); \
135 dev_info(&host->pdev->dev, args); \
137 dev_dbg(&host->pdev->dev, args); \
141 static void s3cmci_send_request(struct mmc_host *mmc);
151 con = readl(host->base + S3C2410_SDICON); in dbg_dumpregs()
152 pre = readl(host->base + S3C2410_SDIPRE); in dbg_dumpregs()
153 cmdarg = readl(host->base + S3C2410_SDICMDARG); in dbg_dumpregs()
154 cmdcon = readl(host->base + S3C2410_SDICMDCON); in dbg_dumpregs()
155 cmdsta = readl(host->base + S3C2410_SDICMDSTAT); in dbg_dumpregs()
156 r0 = readl(host->base + S3C2410_SDIRSP0); in dbg_dumpregs()
157 r1 = readl(host->base + S3C2410_SDIRSP1); in dbg_dumpregs()
158 r2 = readl(host->base + S3C2410_SDIRSP2); in dbg_dumpregs()
159 r3 = readl(host->base + S3C2410_SDIRSP3); in dbg_dumpregs()
160 timer = readl(host->base + S3C2410_SDITIMER); in dbg_dumpregs()
161 datcon = readl(host->base + S3C2410_SDIDCON); in dbg_dumpregs()
162 datcnt = readl(host->base + S3C2410_SDIDCNT); in dbg_dumpregs()
163 datsta = readl(host->base + S3C2410_SDIDSTA); in dbg_dumpregs()
164 fsta = readl(host->base + S3C2410_SDIFSTA); in dbg_dumpregs()
184 snprintf(host->dbgmsg_cmd, 300, in prepare_dbgmsg()
186 host->ccnt, (stop ? " (STOP)" : ""), in prepare_dbgmsg()
187 cmd->opcode, cmd->arg, cmd->flags, cmd->retries); in prepare_dbgmsg()
189 if (cmd->data) { in prepare_dbgmsg()
190 snprintf(host->dbgmsg_dat, 300, in prepare_dbgmsg()
192 host->dcnt, cmd->data->blksz, in prepare_dbgmsg()
193 cmd->data->blocks, in prepare_dbgmsg()
194 cmd->data->blocks * cmd->data->blksz); in prepare_dbgmsg()
196 host->dbgmsg_dat[0] = '\0'; in prepare_dbgmsg()
208 if (cmd->error == 0) { in dbg_dumpcmd()
210 host->dbgmsg_cmd, cmd->resp[0]); in dbg_dumpcmd()
213 cmd->error, host->dbgmsg_cmd, host->status); in dbg_dumpcmd()
216 if (!cmd->data) in dbg_dumpcmd()
219 if (cmd->data->error == 0) { in dbg_dumpcmd()
220 dbg(host, dbglvl, "DAT[OK] %s\n", host->dbgmsg_dat); in dbg_dumpcmd()
223 cmd->data->error, host->dbgmsg_dat, in dbg_dumpcmd()
224 readl(host->base + S3C2410_SDIDCNT)); in dbg_dumpcmd()
239 * s3cmci_host_usedma - return whether the host is using dma or pio
259 newmask = readl(host->base + host->sdiimsk); in enable_imask()
262 writel(newmask, host->base + host->sdiimsk); in enable_imask()
271 newmask = readl(host->base + host->sdiimsk); in disable_imask()
274 writel(newmask, host->base + host->sdiimsk); in disable_imask()
281 u32 mask = readl(host->base + host->sdiimsk); in clear_imask()
285 writel(mask, host->base + host->sdiimsk); in clear_imask()
289 * s3cmci_check_sdio_irq - test whether the SDIO IRQ is being signalled
293 * controller has failed to re-detect a card interrupt. Read GPE8 and
302 if (host->sdio_irqen) { in s3cmci_check_sdio_irq()
303 if (host->pdata->bus[3] && in s3cmci_check_sdio_irq()
304 gpiod_get_value(host->pdata->bus[3]) == 0) { in s3cmci_check_sdio_irq()
306 mmc_signal_sdio_irq(host->mmc); in s3cmci_check_sdio_irq()
316 if (host->pio_active == XFER_NONE) in get_data_buffer()
317 return -EINVAL; in get_data_buffer()
319 if ((!host->mrq) || (!host->mrq->data)) in get_data_buffer()
320 return -EINVAL; in get_data_buffer()
322 if (host->pio_sgptr >= host->mrq->data->sg_len) { in get_data_buffer()
323 dbg(host, dbg_debug, "no more buffers (%i/%i)\n", in get_data_buffer()
324 host->pio_sgptr, host->mrq->data->sg_len); in get_data_buffer()
325 return -EBUSY; in get_data_buffer()
327 sg = &host->mrq->data->sg[host->pio_sgptr]; in get_data_buffer()
329 *bytes = sg->length; in get_data_buffer()
332 host->pio_sgptr++; in get_data_buffer()
335 host->pio_sgptr, host->mrq->data->sg_len); in get_data_buffer()
342 u32 fifostat = readl(host->base + S3C2410_SDIFSTA); in fifo_count()
350 u32 fifostat = readl(host->base + S3C2410_SDIFSTA); in fifo_free()
353 return 63 - fifostat; in fifo_free()
357 * s3cmci_enable_irq - enable IRQ, after having disabled it.
364 * - disabled during IDLE
365 * - disabled whilst processing data
366 * - enabled during transfer
367 * - enabled whilst awaiting SDIO interrupt detection
376 host->irq_enabled = more; in s3cmci_enable_irq()
377 host->irq_disabled = false; in s3cmci_enable_irq()
379 enable = more | host->sdio_irqen; in s3cmci_enable_irq()
381 if (host->irq_state != enable) { in s3cmci_enable_irq()
382 host->irq_state = enable; in s3cmci_enable_irq()
385 enable_irq(host->irq); in s3cmci_enable_irq()
387 disable_irq(host->irq); in s3cmci_enable_irq()
401 host->irq_disabled = transfer; in s3cmci_disable_irq()
403 if (transfer && host->irq_state) { in s3cmci_disable_irq()
404 host->irq_state = false; in s3cmci_disable_irq()
405 disable_irq(host->irq); in s3cmci_disable_irq()
420 writel(host->prescaler, host->base + S3C2410_SDIPRE); in do_pio_read()
422 from_ptr = host->base + host->sdidata; in do_pio_read()
425 if (!host->pio_bytes) { in do_pio_read()
426 res = get_data_buffer(host, &host->pio_bytes, in do_pio_read()
427 &host->pio_ptr); in do_pio_read()
429 host->pio_active = XFER_NONE; in do_pio_read()
430 host->complete_what = COMPLETION_FINALIZE; in do_pio_read()
433 "complete (no more data).\n"); in do_pio_read()
439 host->pio_bytes, host->pio_ptr); in do_pio_read()
444 fifo, host->pio_bytes, in do_pio_read()
445 readl(host->base + S3C2410_SDIDCNT)); in do_pio_read()
452 if (fifo >= host->pio_bytes) in do_pio_read()
453 fifo = host->pio_bytes; in do_pio_read()
455 fifo -= fifo & 3; in do_pio_read()
457 host->pio_bytes -= fifo; in do_pio_read()
458 host->pio_count += fifo; in do_pio_read()
461 ptr = host->pio_ptr; in do_pio_read()
462 while (fifo_words--) in do_pio_read()
464 host->pio_ptr = ptr; in do_pio_read()
469 u8 *p = (u8 *)host->pio_ptr; in do_pio_read()
471 while (n--) { in do_pio_read()
478 if (!host->pio_bytes) { in do_pio_read()
479 res = get_data_buffer(host, &host->pio_bytes, &host->pio_ptr); in do_pio_read()
482 "pio_read(): complete (no more buffers).\n"); in do_pio_read()
483 host->pio_active = XFER_NONE; in do_pio_read()
484 host->complete_what = COMPLETION_FINALIZE; in do_pio_read()
501 to_ptr = host->base + host->sdidata; in do_pio_write()
504 if (!host->pio_bytes) { in do_pio_write()
505 res = get_data_buffer(host, &host->pio_bytes, in do_pio_write()
506 &host->pio_ptr); in do_pio_write()
509 "pio_write(): complete (no more data).\n"); in do_pio_write()
510 host->pio_active = XFER_NONE; in do_pio_write()
517 host->pio_bytes, host->pio_ptr); in do_pio_write()
525 if (fifo >= host->pio_bytes) in do_pio_write()
526 fifo = host->pio_bytes; in do_pio_write()
528 fifo -= fifo & 3; in do_pio_write()
530 host->pio_bytes -= fifo; in do_pio_write()
531 host->pio_count += fifo; in do_pio_write()
534 ptr = host->pio_ptr; in do_pio_write()
535 while (fifo--) in do_pio_write()
537 host->pio_ptr = ptr; in do_pio_write()
549 if (host->pio_active == XFER_WRITE) in pio_tasklet()
552 if (host->pio_active == XFER_READ) in pio_tasklet()
555 if (host->complete_what == COMPLETION_FINALIZE) { in pio_tasklet()
557 if (host->pio_active != XFER_NONE) { in pio_tasklet()
559 "- pio_count:[%u] pio_bytes:[%u]\n", in pio_tasklet()
560 (host->pio_active == XFER_READ) ? "read" : "write", in pio_tasklet()
561 host->pio_count, host->pio_bytes); in pio_tasklet()
563 if (host->mrq->data) in pio_tasklet()
564 host->mrq->data->error = -EINVAL; in pio_tasklet()
576 * host->mrq points to current request
577 * host->complete_what Indicates when the request is considered done
582 * host->complete_request is the completion-object the driver waits for
584 * 1) Driver sets up host->mrq and host->complete_what
588 * 5) Driver waits for host->complete_rquest
590 * 6) ISR sets host->mrq->cmd->error and host->mrq->data->error
591 * 7) ISR completes host->complete_request
595 * Note: "->error"-fields are expected to be set to 0 before the request
596 * was issued by mmc.c - therefore they are only set, when an error
608 mci_dsta = readl(host->base + S3C2410_SDIDSTA); in s3cmci_irq()
609 mci_imsk = readl(host->base + host->sdiimsk); in s3cmci_irq()
614 writel(mci_dclear, host->base + S3C2410_SDIDSTA); in s3cmci_irq()
616 mmc_signal_sdio_irq(host->mmc); in s3cmci_irq()
621 spin_lock_irqsave(&host->complete_lock, iflags); in s3cmci_irq()
623 mci_csta = readl(host->base + S3C2410_SDICMDSTAT); in s3cmci_irq()
624 mci_dcnt = readl(host->base + S3C2410_SDIDCNT); in s3cmci_irq()
625 mci_fsta = readl(host->base + S3C2410_SDIFSTA); in s3cmci_irq()
628 if ((host->complete_what == COMPLETION_NONE) || in s3cmci_irq()
629 (host->complete_what == COMPLETION_FINALIZE)) { in s3cmci_irq()
630 host->status = "nothing to complete"; in s3cmci_irq()
635 if (!host->mrq) { in s3cmci_irq()
636 host->status = "no active mrq"; in s3cmci_irq()
641 cmd = host->cmd_is_stop ? host->mrq->stop : host->mrq->cmd; in s3cmci_irq()
644 host->status = "no active cmd"; in s3cmci_irq()
650 if ((host->pio_active == XFER_WRITE) && in s3cmci_irq()
654 tasklet_schedule(&host->pio_tasklet); in s3cmci_irq()
655 host->status = "pio tx"; in s3cmci_irq()
658 if ((host->pio_active == XFER_READ) && in s3cmci_irq()
665 tasklet_schedule(&host->pio_tasklet); in s3cmci_irq()
666 host->status = "pio rx"; in s3cmci_irq()
672 cmd->error = -ETIMEDOUT; in s3cmci_irq()
673 host->status = "error: command timeout"; in s3cmci_irq()
678 if (host->complete_what == COMPLETION_CMDSENT) { in s3cmci_irq()
679 host->status = "ok: command sent"; in s3cmci_irq()
687 if (cmd->flags & MMC_RSP_CRC) { in s3cmci_irq()
688 if (host->mrq->cmd->flags & MMC_RSP_136) { in s3cmci_irq()
696 * cmd->error = -EILSEQ; in s3cmci_irq()
697 * host->status = "error: bad command crc"; in s3cmci_irq()
707 if (host->complete_what == COMPLETION_RSPFIN) { in s3cmci_irq()
708 host->status = "ok: command response received"; in s3cmci_irq()
712 if (host->complete_what == COMPLETION_XFERFINISH_RSPFIN) in s3cmci_irq()
713 host->complete_what = COMPLETION_XFERFINISH; in s3cmci_irq()
721 if (!cmd->data) in s3cmci_irq()
725 if (host->is2440) { in s3cmci_irq()
728 host->mrq->data->error = -EILSEQ; in s3cmci_irq()
729 host->status = "error: 2440 fifo failure"; in s3cmci_irq()
735 cmd->data->error = -EILSEQ; in s3cmci_irq()
736 host->status = "error: fifo failure"; in s3cmci_irq()
743 cmd->data->error = -EILSEQ; in s3cmci_irq()
744 host->status = "error: bad data crc (outgoing)"; in s3cmci_irq()
750 cmd->data->error = -EILSEQ; in s3cmci_irq()
751 host->status = "error: bad data crc (incoming)"; in s3cmci_irq()
757 cmd->data->error = -ETIMEDOUT; in s3cmci_irq()
758 host->status = "error: data timeout"; in s3cmci_irq()
763 if (host->complete_what == COMPLETION_XFERFINISH) { in s3cmci_irq()
764 host->status = "ok: data transfer completed"; in s3cmci_irq()
768 if (host->complete_what == COMPLETION_XFERFINISH_RSPFIN) in s3cmci_irq()
769 host->complete_what = COMPLETION_RSPFIN; in s3cmci_irq()
775 writel(mci_cclear, host->base + S3C2410_SDICMDSTAT); in s3cmci_irq()
776 writel(mci_dclear, host->base + S3C2410_SDIDSTA); in s3cmci_irq()
781 host->pio_active = XFER_NONE; in s3cmci_irq()
784 host->complete_what = COMPLETION_FINALIZE; in s3cmci_irq()
787 tasklet_schedule(&host->pio_tasklet); in s3cmci_irq()
794 mci_csta, mci_dsta, mci_fsta, mci_dcnt, host->status); in s3cmci_irq()
796 spin_unlock_irqrestore(&host->complete_lock, iflags); in s3cmci_irq()
806 BUG_ON(!host->mrq); in s3cmci_dma_done_callback()
807 BUG_ON(!host->mrq->data); in s3cmci_dma_done_callback()
809 spin_lock_irqsave(&host->complete_lock, iflags); in s3cmci_dma_done_callback()
813 host->dma_complete = 1; in s3cmci_dma_done_callback()
814 host->complete_what = COMPLETION_FINALIZE; in s3cmci_dma_done_callback()
816 tasklet_schedule(&host->pio_tasklet); in s3cmci_dma_done_callback()
817 spin_unlock_irqrestore(&host->complete_lock, iflags); in s3cmci_dma_done_callback()
823 struct mmc_request *mrq = host->mrq; in finalize_request()
827 if (host->complete_what != COMPLETION_FINALIZE) in finalize_request()
832 cmd = host->cmd_is_stop ? mrq->stop : mrq->cmd; in finalize_request()
834 if (cmd->data && (cmd->error == 0) && in finalize_request()
835 (cmd->data->error == 0)) { in finalize_request()
836 if (s3cmci_host_usedma(host) && (!host->dma_complete)) { in finalize_request()
838 host->dma_complete); in finalize_request()
844 cmd->resp[0] = readl(host->base + S3C2410_SDIRSP0); in finalize_request()
845 cmd->resp[1] = readl(host->base + S3C2410_SDIRSP1); in finalize_request()
846 cmd->resp[2] = readl(host->base + S3C2410_SDIRSP2); in finalize_request()
847 cmd->resp[3] = readl(host->base + S3C2410_SDIRSP3); in finalize_request()
849 writel(host->prescaler, host->base + S3C2410_SDIPRE); in finalize_request()
851 if (cmd->error) in finalize_request()
854 if (cmd->data && cmd->data->error) in finalize_request()
860 writel(0, host->base + S3C2410_SDICMDARG); in finalize_request()
861 writel(S3C2410_SDIDCON_STOP, host->base + S3C2410_SDIDCON); in finalize_request()
862 writel(0, host->base + S3C2410_SDICMDCON); in finalize_request()
865 if (cmd->data && cmd->error) in finalize_request()
866 cmd->data->error = cmd->error; in finalize_request()
868 if (cmd->data && cmd->data->stop && (!host->cmd_is_stop)) { in finalize_request()
869 host->cmd_is_stop = 1; in finalize_request()
870 s3cmci_send_request(host->mmc); in finalize_request()
874 /* If we have no data transfer we are finished here */ in finalize_request()
875 if (!mrq->data) in finalize_request()
878 /* Calculate the amout of bytes transfer if there was no error */ in finalize_request()
879 if (mrq->data->error == 0) { in finalize_request()
880 mrq->data->bytes_xfered = in finalize_request()
881 (mrq->data->blocks * mrq->data->blksz); in finalize_request()
883 mrq->data->bytes_xfered = 0; in finalize_request()
888 if (mrq->data->error != 0) { in finalize_request()
890 dmaengine_terminate_all(host->dma); in finalize_request()
892 if (host->is2440) { in finalize_request()
896 host->base + S3C2410_SDIFSTA); in finalize_request()
901 mci_con = readl(host->base + S3C2410_SDICON); in finalize_request()
904 writel(mci_con, host->base + S3C2410_SDICON); in finalize_request()
909 host->complete_what = COMPLETION_NONE; in finalize_request()
910 host->mrq = NULL; in finalize_request()
913 mmc_request_done(host->mmc, mrq); in finalize_request()
927 if (cmd->data) in s3cmci_send_command()
928 host->complete_what = COMPLETION_XFERFINISH_RSPFIN; in s3cmci_send_command()
929 else if (cmd->flags & MMC_RSP_PRESENT) in s3cmci_send_command()
930 host->complete_what = COMPLETION_RSPFIN; in s3cmci_send_command()
932 host->complete_what = COMPLETION_CMDSENT; in s3cmci_send_command()
934 writel(cmd->arg, host->base + S3C2410_SDICMDARG); in s3cmci_send_command()
936 ccon = cmd->opcode & S3C2410_SDICMDCON_INDEX; in s3cmci_send_command()
939 if (cmd->flags & MMC_RSP_PRESENT) in s3cmci_send_command()
942 if (cmd->flags & MMC_RSP_136) in s3cmci_send_command()
945 writel(ccon, host->base + S3C2410_SDICMDCON); in s3cmci_send_command()
952 if ((data->blksz & 3) != 0) { in s3cmci_setup_data()
956 if (data->blocks > 1) { in s3cmci_setup_data()
957 pr_warn("%s: can't do non-word sized block transfers (blksz %d)\n", in s3cmci_setup_data()
958 __func__, data->blksz); in s3cmci_setup_data()
959 return -EINVAL; in s3cmci_setup_data()
963 while (readl(host->base + S3C2410_SDIDSTA) & in s3cmci_setup_data()
969 writel(S3C2410_SDIDCON_STOP, host->base + S3C2410_SDIDCON); in s3cmci_setup_data()
972 if ((stoptries--) == 0) { in s3cmci_setup_data()
974 return -EINVAL; in s3cmci_setup_data()
978 dcon = data->blocks & S3C2410_SDIDCON_BLKNUM_MASK; in s3cmci_setup_data()
983 if (host->bus_width == MMC_BUS_WIDTH_4) in s3cmci_setup_data()
988 if (data->flags & MMC_DATA_WRITE) { in s3cmci_setup_data()
993 if (data->flags & MMC_DATA_READ) { in s3cmci_setup_data()
998 if (host->is2440) { in s3cmci_setup_data()
1003 writel(dcon, host->base + S3C2410_SDIDCON); in s3cmci_setup_data()
1007 writel(data->blksz, host->base + S3C2410_SDIBSIZE); in s3cmci_setup_data()
1017 if (host->is2440) { in s3cmci_setup_data()
1018 writel(0x007FFFFF, host->base + S3C2410_SDITIMER); in s3cmci_setup_data()
1020 writel(0x0000FFFF, host->base + S3C2410_SDITIMER); in s3cmci_setup_data()
1023 if (data->flags & MMC_DATA_READ) in s3cmci_setup_data()
1024 writel(0xFF, host->base + S3C2410_SDIPRE); in s3cmci_setup_data()
1034 int rw = (data->flags & MMC_DATA_WRITE) ? 1 : 0; in s3cmci_prepare_pio()
1036 BUG_ON((data->flags & BOTH_DIR) == BOTH_DIR); in s3cmci_prepare_pio()
1038 host->pio_sgptr = 0; in s3cmci_prepare_pio()
1039 host->pio_bytes = 0; in s3cmci_prepare_pio()
1040 host->pio_count = 0; in s3cmci_prepare_pio()
1041 host->pio_active = rw ? XFER_WRITE : XFER_READ; in s3cmci_prepare_pio()
1056 int rw = data->flags & MMC_DATA_WRITE; in s3cmci_prepare_dma()
1059 .src_addr = host->mem->start + host->sdidata, in s3cmci_prepare_dma()
1060 .dst_addr = host->mem->start + host->sdidata, in s3cmci_prepare_dma()
1065 BUG_ON((data->flags & BOTH_DIR) == BOTH_DIR); in s3cmci_prepare_dma()
1068 writel(host->prescaler, host->base + S3C2410_SDIPRE); in s3cmci_prepare_dma()
1075 dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len, in s3cmci_prepare_dma()
1078 dmaengine_slave_config(host->dma, &conf); in s3cmci_prepare_dma()
1079 desc = dmaengine_prep_slave_sg(host->dma, data->sg, data->sg_len, in s3cmci_prepare_dma()
1084 desc->callback = s3cmci_dma_done_callback; in s3cmci_prepare_dma()
1085 desc->callback_param = host; in s3cmci_prepare_dma()
1087 dma_async_issue_pending(host->dma); in s3cmci_prepare_dma()
1092 dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, in s3cmci_prepare_dma()
1094 return -ENOMEM; in s3cmci_prepare_dma()
1097 static void s3cmci_send_request(struct mmc_host *mmc) in s3cmci_send_request() argument
1099 struct s3cmci_host *host = mmc_priv(mmc); in s3cmci_send_request()
1100 struct mmc_request *mrq = host->mrq; in s3cmci_send_request()
1101 struct mmc_command *cmd = host->cmd_is_stop ? mrq->stop : mrq->cmd; in s3cmci_send_request()
1103 host->ccnt++; in s3cmci_send_request()
1104 prepare_dbgmsg(host, cmd, host->cmd_is_stop); in s3cmci_send_request()
1109 writel(0xFFFFFFFF, host->base + S3C2410_SDICMDSTAT); in s3cmci_send_request()
1110 writel(0xFFFFFFFF, host->base + S3C2410_SDIDSTA); in s3cmci_send_request()
1111 writel(0xFFFFFFFF, host->base + S3C2410_SDIFSTA); in s3cmci_send_request()
1113 if (cmd->data) { in s3cmci_send_request()
1114 int res = s3cmci_setup_data(host, cmd->data); in s3cmci_send_request()
1116 host->dcnt++; in s3cmci_send_request()
1120 cmd->error = res; in s3cmci_send_request()
1121 cmd->data->error = res; in s3cmci_send_request()
1123 mmc_request_done(mmc, mrq); in s3cmci_send_request()
1128 res = s3cmci_prepare_dma(host, cmd->data); in s3cmci_send_request()
1130 res = s3cmci_prepare_pio(host, cmd->data); in s3cmci_send_request()
1134 cmd->error = res; in s3cmci_send_request()
1135 cmd->data->error = res; in s3cmci_send_request()
1137 mmc_request_done(mmc, mrq); in s3cmci_send_request()
1149 static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq) in s3cmci_request() argument
1151 struct s3cmci_host *host = mmc_priv(mmc); in s3cmci_request()
1153 host->status = "mmc request"; in s3cmci_request()
1154 host->cmd_is_stop = 0; in s3cmci_request()
1155 host->mrq = mrq; in s3cmci_request()
1157 if (mmc_gpio_get_cd(mmc) == 0) { in s3cmci_request()
1158 dbg(host, dbg_err, "%s: no medium present\n", __func__); in s3cmci_request()
1159 host->mrq->cmd->error = -ENOMEDIUM; in s3cmci_request()
1160 mmc_request_done(mmc, mrq); in s3cmci_request()
1162 s3cmci_send_request(mmc); in s3cmci_request()
1171 host->real_rate = host->clk_rate / (host->clk_div*(mci_psc+1)); in s3cmci_set_clk()
1173 if (host->real_rate <= ios->clock) in s3cmci_set_clk()
1180 host->prescaler = mci_psc; in s3cmci_set_clk()
1181 writel(host->prescaler, host->base + S3C2410_SDIPRE); in s3cmci_set_clk()
1184 if (ios->clock == 0) in s3cmci_set_clk()
1185 host->real_rate = 0; in s3cmci_set_clk()
1188 static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) in s3cmci_set_ios() argument
1190 struct s3cmci_host *host = mmc_priv(mmc); in s3cmci_set_ios()
1195 mci_con = readl(host->base + S3C2410_SDICON); in s3cmci_set_ios()
1197 switch (ios->power_mode) { in s3cmci_set_ios()
1200 if (!host->is2440) in s3cmci_set_ios()
1206 if (host->is2440) in s3cmci_set_ios()
1211 if (host->pdata->set_power) in s3cmci_set_ios()
1212 host->pdata->set_power(ios->power_mode, ios->vdd); in s3cmci_set_ios()
1217 if (ios->clock) in s3cmci_set_ios()
1222 writel(mci_con, host->base + S3C2410_SDICON); in s3cmci_set_ios()
1224 if ((ios->power_mode == MMC_POWER_ON) || in s3cmci_set_ios()
1225 (ios->power_mode == MMC_POWER_UP)) { in s3cmci_set_ios()
1227 host->real_rate/1000, ios->clock/1000); in s3cmci_set_ios()
1232 host->bus_width = ios->bus_width; in s3cmci_set_ios()
1237 u32 con = readl(host->base + S3C2410_SDICON); in s3cmci_reset()
1240 writel(con, host->base + S3C2410_SDICON); in s3cmci_reset()
1243 static void s3cmci_enable_sdio_irq(struct mmc_host *mmc, int enable) in s3cmci_enable_sdio_irq() argument
1245 struct s3cmci_host *host = mmc_priv(mmc); in s3cmci_enable_sdio_irq()
1251 con = readl(host->base + S3C2410_SDICON); in s3cmci_enable_sdio_irq()
1252 host->sdio_irqen = enable; in s3cmci_enable_sdio_irq()
1254 if (enable == host->sdio_irqen) in s3cmci_enable_sdio_irq()
1261 if (!host->irq_state && !host->irq_disabled) { in s3cmci_enable_sdio_irq()
1262 host->irq_state = true; in s3cmci_enable_sdio_irq()
1263 enable_irq(host->irq); in s3cmci_enable_sdio_irq()
1269 if (!host->irq_enabled && host->irq_state) { in s3cmci_enable_sdio_irq()
1270 disable_irq_nosync(host->irq); in s3cmci_enable_sdio_irq()
1271 host->irq_state = false; in s3cmci_enable_sdio_irq()
1275 writel(con, host->base + S3C2410_SDICON); in s3cmci_enable_sdio_irq()
1297 struct mmc_host *mmc; in s3cmci_cpufreq_transition() local
1302 newclk = clk_get_rate(host->clk); in s3cmci_cpufreq_transition()
1303 mmc = host->mmc; in s3cmci_cpufreq_transition()
1305 if ((val == CPUFREQ_PRECHANGE && newclk > host->clk_rate) || in s3cmci_cpufreq_transition()
1306 (val == CPUFREQ_POSTCHANGE && newclk < host->clk_rate)) { in s3cmci_cpufreq_transition()
1307 spin_lock_irqsave(&mmc->lock, flags); in s3cmci_cpufreq_transition()
1309 host->clk_rate = newclk; in s3cmci_cpufreq_transition()
1311 if (mmc->ios.power_mode != MMC_POWER_OFF && in s3cmci_cpufreq_transition()
1312 mmc->ios.clock != 0) in s3cmci_cpufreq_transition()
1313 s3cmci_set_clk(host, &mmc->ios); in s3cmci_cpufreq_transition()
1315 spin_unlock_irqrestore(&mmc->lock, flags); in s3cmci_cpufreq_transition()
1323 host->freq_transition.notifier_call = s3cmci_cpufreq_transition; in s3cmci_cpufreq_register()
1325 return cpufreq_register_notifier(&host->freq_transition, in s3cmci_cpufreq_register()
1331 cpufreq_unregister_notifier(&host->freq_transition, in s3cmci_cpufreq_deregister()
1351 struct s3cmci_host *host = seq->private; in s3cmci_state_show()
1353 seq_printf(seq, "Register base = 0x%p\n", host->base); in s3cmci_state_show()
1354 seq_printf(seq, "Clock rate = %ld\n", host->clk_rate); in s3cmci_state_show()
1355 seq_printf(seq, "Prescale = %d\n", host->prescaler); in s3cmci_state_show()
1356 seq_printf(seq, "is2440 = %d\n", host->is2440); in s3cmci_state_show()
1357 seq_printf(seq, "IRQ = %d\n", host->irq); in s3cmci_state_show()
1358 seq_printf(seq, "IRQ enabled = %d\n", host->irq_enabled); in s3cmci_state_show()
1359 seq_printf(seq, "IRQ disabled = %d\n", host->irq_disabled); in s3cmci_state_show()
1360 seq_printf(seq, "IRQ state = %d\n", host->irq_state); in s3cmci_state_show()
1361 seq_printf(seq, "CD IRQ = %d\n", host->irq_cd); in s3cmci_state_show()
1363 seq_printf(seq, "SDIIMSK at %d\n", host->sdiimsk); in s3cmci_state_show()
1364 seq_printf(seq, "SDIDATA at %d\n", host->sdidata); in s3cmci_state_show()
1399 struct s3cmci_host *host = seq->private; in s3cmci_regs_show()
1402 for (; rptr->name; rptr++) in s3cmci_regs_show()
1403 seq_printf(seq, "SDI%s\t=0x%08x\n", rptr->name, in s3cmci_regs_show()
1404 readl(host->base + rptr->addr)); in s3cmci_regs_show()
1406 seq_printf(seq, "SDIIMSK\t=0x%08x\n", readl(host->base + host->sdiimsk)); in s3cmci_regs_show()
1415 struct device *dev = &host->pdev->dev; in s3cmci_debugfs_attach()
1419 host->debug_root = root; in s3cmci_debugfs_attach()
1427 debugfs_remove_recursive(host->debug_root); in s3cmci_debugfs_remove()
1438 struct platform_device *pdev = host->pdev; in s3cmci_probe_pdata()
1439 struct mmc_host *mmc = host->mmc; in s3cmci_probe_pdata() local
1443 host->is2440 = platform_get_device_id(pdev)->driver_data; in s3cmci_probe_pdata()
1444 pdata = pdev->dev.platform_data; in s3cmci_probe_pdata()
1446 dev_err(&pdev->dev, "need platform data"); in s3cmci_probe_pdata()
1447 return -ENXIO; in s3cmci_probe_pdata()
1451 pdata->bus[i] = devm_gpiod_get_index(&pdev->dev, "bus", i, in s3cmci_probe_pdata()
1453 if (IS_ERR(pdata->bus[i])) { in s3cmci_probe_pdata()
1454 dev_err(&pdev->dev, "failed to get gpio %d\n", i); in s3cmci_probe_pdata()
1455 return PTR_ERR(pdata->bus[i]); in s3cmci_probe_pdata()
1459 if (pdata->no_wprotect) in s3cmci_probe_pdata()
1460 mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT; in s3cmci_probe_pdata()
1462 if (pdata->no_detect) in s3cmci_probe_pdata()
1463 mmc->caps |= MMC_CAP_NEEDS_POLL; in s3cmci_probe_pdata()
1465 if (pdata->wprotect_invert) in s3cmci_probe_pdata()
1466 mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH; in s3cmci_probe_pdata()
1468 /* If we get -ENOENT we have no card detect GPIO line */ in s3cmci_probe_pdata()
1469 ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0); in s3cmci_probe_pdata()
1470 if (ret != -ENOENT) { in s3cmci_probe_pdata()
1471 dev_err(&pdev->dev, "error requesting GPIO for CD %d\n", in s3cmci_probe_pdata()
1476 ret = mmc_gpiod_request_ro(host->mmc, "wp", 0, 0); in s3cmci_probe_pdata()
1477 if (ret != -ENOENT) { in s3cmci_probe_pdata()
1478 dev_err(&pdev->dev, "error requesting GPIO for WP %d\n", in s3cmci_probe_pdata()
1488 struct platform_device *pdev = host->pdev; in s3cmci_probe_dt()
1490 struct mmc_host *mmc = host->mmc; in s3cmci_probe_dt() local
1493 host->is2440 = (long) of_device_get_match_data(&pdev->dev); in s3cmci_probe_dt()
1495 ret = mmc_of_parse(mmc); in s3cmci_probe_dt()
1499 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); in s3cmci_probe_dt()
1501 return -ENOMEM; in s3cmci_probe_dt()
1503 pdev->dev.platform_data = pdata; in s3cmci_probe_dt()
1511 struct mmc_host *mmc; in s3cmci_probe() local
1514 mmc = mmc_alloc_host(sizeof(struct s3cmci_host), &pdev->dev); in s3cmci_probe()
1515 if (!mmc) { in s3cmci_probe()
1516 ret = -ENOMEM; in s3cmci_probe()
1520 host = mmc_priv(mmc); in s3cmci_probe()
1521 host->mmc = mmc; in s3cmci_probe()
1522 host->pdev = pdev; in s3cmci_probe()
1524 if (pdev->dev.of_node) in s3cmci_probe()
1532 host->pdata = pdev->dev.platform_data; in s3cmci_probe()
1534 spin_lock_init(&host->complete_lock); in s3cmci_probe()
1535 tasklet_init(&host->pio_tasklet, pio_tasklet, (unsigned long) host); in s3cmci_probe()
1537 if (host->is2440) { in s3cmci_probe()
1538 host->sdiimsk = S3C2440_SDIIMSK; in s3cmci_probe()
1539 host->sdidata = S3C2440_SDIDATA; in s3cmci_probe()
1540 host->clk_div = 1; in s3cmci_probe()
1542 host->sdiimsk = S3C2410_SDIIMSK; in s3cmci_probe()
1543 host->sdidata = S3C2410_SDIDATA; in s3cmci_probe()
1544 host->clk_div = 2; in s3cmci_probe()
1547 host->complete_what = COMPLETION_NONE; in s3cmci_probe()
1548 host->pio_active = XFER_NONE; in s3cmci_probe()
1550 host->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); in s3cmci_probe()
1551 if (!host->mem) { in s3cmci_probe()
1552 dev_err(&pdev->dev, in s3cmci_probe()
1555 ret = -ENOENT; in s3cmci_probe()
1559 host->mem = request_mem_region(host->mem->start, in s3cmci_probe()
1560 resource_size(host->mem), pdev->name); in s3cmci_probe()
1562 if (!host->mem) { in s3cmci_probe()
1563 dev_err(&pdev->dev, "failed to request io memory region.\n"); in s3cmci_probe()
1564 ret = -ENOENT; in s3cmci_probe()
1568 host->base = ioremap(host->mem->start, resource_size(host->mem)); in s3cmci_probe()
1569 if (!host->base) { in s3cmci_probe()
1570 dev_err(&pdev->dev, "failed to ioremap() io memory region.\n"); in s3cmci_probe()
1571 ret = -EINVAL; in s3cmci_probe()
1575 host->irq = platform_get_irq(pdev, 0); in s3cmci_probe()
1576 if (host->irq <= 0) { in s3cmci_probe()
1577 ret = -EINVAL; in s3cmci_probe()
1581 if (request_irq(host->irq, s3cmci_irq, 0, DRIVER_NAME, host)) { in s3cmci_probe()
1582 dev_err(&pdev->dev, "failed to request mci interrupt.\n"); in s3cmci_probe()
1583 ret = -ENOENT; in s3cmci_probe()
1589 * ensure we don't lock the system with un-serviceable requests. */ in s3cmci_probe()
1591 disable_irq(host->irq); in s3cmci_probe()
1592 host->irq_state = false; in s3cmci_probe()
1597 host->dma = dma_request_chan(&pdev->dev, "rx-tx"); in s3cmci_probe()
1598 ret = PTR_ERR_OR_ZERO(host->dma); in s3cmci_probe()
1600 dev_err(&pdev->dev, "cannot get DMA channel.\n"); in s3cmci_probe()
1605 host->clk = clk_get(&pdev->dev, "sdi"); in s3cmci_probe()
1606 if (IS_ERR(host->clk)) { in s3cmci_probe()
1607 dev_err(&pdev->dev, "failed to find clock source.\n"); in s3cmci_probe()
1608 ret = PTR_ERR(host->clk); in s3cmci_probe()
1609 host->clk = NULL; in s3cmci_probe()
1613 ret = clk_prepare_enable(host->clk); in s3cmci_probe()
1615 dev_err(&pdev->dev, "failed to enable clock source.\n"); in s3cmci_probe()
1619 host->clk_rate = clk_get_rate(host->clk); in s3cmci_probe()
1621 mmc->ops = &s3cmci_ops; in s3cmci_probe()
1622 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; in s3cmci_probe()
1624 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; in s3cmci_probe()
1626 mmc->caps = MMC_CAP_4_BIT_DATA; in s3cmci_probe()
1628 mmc->f_min = host->clk_rate / (host->clk_div * 256); in s3cmci_probe()
1629 mmc->f_max = host->clk_rate / host->clk_div; in s3cmci_probe()
1631 if (host->pdata->ocr_avail) in s3cmci_probe()
1632 mmc->ocr_avail = host->pdata->ocr_avail; in s3cmci_probe()
1634 mmc->max_blk_count = 4095; in s3cmci_probe()
1635 mmc->max_blk_size = 4095; in s3cmci_probe()
1636 mmc->max_req_size = 4095 * 512; in s3cmci_probe()
1637 mmc->max_seg_size = mmc->max_req_size; in s3cmci_probe()
1639 mmc->max_segs = 128; in s3cmci_probe()
1643 (host->is2440?"2440":""), in s3cmci_probe()
1644 host->base, host->irq, host->irq_cd, host->dma); in s3cmci_probe()
1648 dev_err(&pdev->dev, "failed to register cpufreq\n"); in s3cmci_probe()
1652 ret = mmc_add_host(mmc); in s3cmci_probe()
1654 dev_err(&pdev->dev, "failed to add mmc host.\n"); in s3cmci_probe()
1660 platform_set_drvdata(pdev, mmc); in s3cmci_probe()
1661 dev_info(&pdev->dev, "%s - using %s, %s SDIO IRQ\n", mmc_hostname(mmc), in s3cmci_probe()
1663 mmc->caps & MMC_CAP_SDIO_IRQ ? "hw" : "sw"); in s3cmci_probe()
1671 clk_disable_unprepare(host->clk); in s3cmci_probe()
1674 clk_put(host->clk); in s3cmci_probe()
1678 dma_release_channel(host->dma); in s3cmci_probe()
1681 free_irq(host->irq, host); in s3cmci_probe()
1684 iounmap(host->base); in s3cmci_probe()
1687 release_mem_region(host->mem->start, resource_size(host->mem)); in s3cmci_probe()
1690 mmc_free_host(mmc); in s3cmci_probe()
1698 struct mmc_host *mmc = platform_get_drvdata(pdev); in s3cmci_shutdown() local
1699 struct s3cmci_host *host = mmc_priv(mmc); in s3cmci_shutdown()
1701 if (host->irq_cd >= 0) in s3cmci_shutdown()
1702 free_irq(host->irq_cd, host); in s3cmci_shutdown()
1706 mmc_remove_host(mmc); in s3cmci_shutdown()
1707 clk_disable_unprepare(host->clk); in s3cmci_shutdown()
1712 struct mmc_host *mmc = platform_get_drvdata(pdev); in s3cmci_remove() local
1713 struct s3cmci_host *host = mmc_priv(mmc); in s3cmci_remove()
1717 clk_put(host->clk); in s3cmci_remove()
1719 tasklet_disable(&host->pio_tasklet); in s3cmci_remove()
1722 dma_release_channel(host->dma); in s3cmci_remove()
1724 free_irq(host->irq, host); in s3cmci_remove()
1726 iounmap(host->base); in s3cmci_remove()
1727 release_mem_region(host->mem->start, resource_size(host->mem)); in s3cmci_remove()
1729 mmc_free_host(mmc); in s3cmci_remove()
1735 .compatible = "samsung,s3c2410-sdi",
1739 .compatible = "samsung,s3c2412-sdi",
1743 .compatible = "samsung,s3c2440-sdi",
1752 .name = "s3c2410-sdi",
1755 .name = "s3c2412-sdi",
1758 .name = "s3c2440-sdi",
1768 .name = "s3c-sdi",
1780 MODULE_DESCRIPTION("Samsung S3C MMC/SD Card Interface driver");
1782 MODULE_AUTHOR("Thomas Kleffel <tk@maintech.de>, Ben Dooks <ben-linux@fluff.org>");