diff options
author | Arnd Bergmann <arnd@arndb.de> | 2022-09-30 14:08:58 +0300 |
---|---|---|
committer | Arnd Bergmann <arnd@arndb.de> | 2023-01-16 11:26:06 +0300 |
commit | 0b14558977a777780bb18c2e86609cb53fe3d05a (patch) | |
tree | 48019d2cc3226b6718e91b864becfb462991ceff | |
parent | d06dd30beb25b273d477a10ea204f595144c1174 (diff) | |
download | linux-0b14558977a777780bb18c2e86609cb53fe3d05a.tar.xz |
mmc: remove s3cmci driver
The s3c24xx platform is gone, so this driver can be removed as well.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
-rw-r--r-- | MAINTAINERS | 6 | ||||
-rw-r--r-- | drivers/mmc/host/Kconfig | 43 | ||||
-rw-r--r-- | drivers/mmc/host/Makefile | 1 | ||||
-rw-r--r-- | drivers/mmc/host/s3cmci.c | 1777 | ||||
-rw-r--r-- | drivers/mmc/host/s3cmci.h | 75 | ||||
-rw-r--r-- | include/linux/platform_data/mmc-s3cmci.h | 51 |
6 files changed, 0 insertions, 1953 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 35b33e734045..ed103dadc39b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -18284,12 +18284,6 @@ L: linux-s390@vger.kernel.org S: Supported F: drivers/s390/scsi/zfcp_* -S3C24XX SD/MMC Driver -M: Ben Dooks <ben-linux@fluff.org> -L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) -S: Supported -F: drivers/mmc/host/s3cmci.* - SAA6588 RDS RECEIVER DRIVER M: Hans Verkuil <hverkuil@xs4all.nl> L: linux-media@vger.kernel.org diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 1be2884b22fe..f0456ad4b597 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -628,49 +628,6 @@ config MMC_SPI If unsure, or if your system has no SPI master driver, say N. -config MMC_S3C - tristate "Samsung S3C SD/MMC Card Interface support" - depends on ARCH_S3C24XX || COMPILE_TEST - depends on S3C24XX_DMAC || COMPILE_TEST - help - This selects a driver for the MCI interface found in - Samsung's S3C2410, S3C2412, S3C2440, S3C2442 CPUs. - If you have a board based on one of those and a MMC/SD - slot, say Y or M here. - - If unsure, say N. - -config MMC_S3C_HW_SDIO_IRQ - bool "Hardware support for SDIO IRQ" - depends on MMC_S3C - help - Enable the hardware support for SDIO interrupts instead of using - the generic polling code. - -choice - prompt "Samsung S3C SD/MMC transfer code" - depends on MMC_S3C - -config MMC_S3C_PIO - bool "Use PIO transfers only" - help - Use PIO to transfer data between memory and the hardware. - - PIO is slower than DMA as it requires CPU instructions to - move the data. This has been the traditional default for - the S3C MCI driver. - -config MMC_S3C_DMA - bool "Use DMA transfers only" - help - Use DMA to transfer data between memory and the hardware. - - Currently, the DMA support in this driver seems to not be - working properly and needs to be debugged before this - option is useful. - -endchoice - config MMC_SDRICOH_CS tristate "MMC/SD driver for Ricoh Bay1Controllers" depends on PCI && PCMCIA diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index 76bbde01ed73..063d87764966 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -34,7 +34,6 @@ obj-$(CONFIG_MMC_MVSDIO) += mvsdio.o obj-$(CONFIG_MMC_DAVINCI) += davinci_mmc.o obj-$(CONFIG_MMC_SPI) += mmc_spi.o obj-$(CONFIG_MMC_SPI) += of_mmc_spi.o -obj-$(CONFIG_MMC_S3C) += s3cmci.o obj-$(CONFIG_MMC_SDRICOH_CS) += sdricoh_cs.o obj-$(CONFIG_MMC_TMIO) += tmio_mmc.o obj-$(CONFIG_MMC_TMIO_CORE) += tmio_mmc_core.o diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c deleted file mode 100644 index 8d5929a32d34..000000000000 --- a/drivers/mmc/host/s3cmci.c +++ /dev/null @@ -1,1777 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * linux/drivers/mmc/s3cmci.h - Samsung S3C MCI driver - * - * Copyright (C) 2004-2006 maintech GmbH, Thomas Kleffel <tk@maintech.de> - * - * Current driver maintained by Ben Dooks and Simtec Electronics - * Copyright (C) 2008 Simtec Electronics <ben-linux@fluff.org> - */ - -#include <linux/module.h> -#include <linux/dmaengine.h> -#include <linux/dma-mapping.h> -#include <linux/clk.h> -#include <linux/mmc/host.h> -#include <linux/platform_device.h> -#include <linux/cpufreq.h> -#include <linux/debugfs.h> -#include <linux/seq_file.h> -#include <linux/gpio/consumer.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/io.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/mmc/slot-gpio.h> -#include <linux/platform_data/mmc-s3cmci.h> - -#include "s3cmci.h" - -#define DRIVER_NAME "s3c-mci" - -#define S3C2410_SDICON (0x00) -#define S3C2410_SDIPRE (0x04) -#define S3C2410_SDICMDARG (0x08) -#define S3C2410_SDICMDCON (0x0C) -#define S3C2410_SDICMDSTAT (0x10) -#define S3C2410_SDIRSP0 (0x14) -#define S3C2410_SDIRSP1 (0x18) -#define S3C2410_SDIRSP2 (0x1C) -#define S3C2410_SDIRSP3 (0x20) -#define S3C2410_SDITIMER (0x24) -#define S3C2410_SDIBSIZE (0x28) -#define S3C2410_SDIDCON (0x2C) -#define S3C2410_SDIDCNT (0x30) -#define S3C2410_SDIDSTA (0x34) -#define S3C2410_SDIFSTA (0x38) - -#define S3C2410_SDIDATA (0x3C) -#define S3C2410_SDIIMSK (0x40) - -#define S3C2440_SDIDATA (0x40) -#define S3C2440_SDIIMSK (0x3C) - -#define S3C2440_SDICON_SDRESET (1 << 8) -#define S3C2410_SDICON_SDIOIRQ (1 << 3) -#define S3C2410_SDICON_FIFORESET (1 << 1) -#define S3C2410_SDICON_CLOCKTYPE (1 << 0) - -#define S3C2410_SDICMDCON_LONGRSP (1 << 10) -#define S3C2410_SDICMDCON_WAITRSP (1 << 9) -#define S3C2410_SDICMDCON_CMDSTART (1 << 8) -#define S3C2410_SDICMDCON_SENDERHOST (1 << 6) -#define S3C2410_SDICMDCON_INDEX (0x3f) - -#define S3C2410_SDICMDSTAT_CRCFAIL (1 << 12) -#define S3C2410_SDICMDSTAT_CMDSENT (1 << 11) -#define S3C2410_SDICMDSTAT_CMDTIMEOUT (1 << 10) -#define S3C2410_SDICMDSTAT_RSPFIN (1 << 9) - -#define S3C2440_SDIDCON_DS_WORD (2 << 22) -#define S3C2410_SDIDCON_TXAFTERRESP (1 << 20) -#define S3C2410_SDIDCON_RXAFTERCMD (1 << 19) -#define S3C2410_SDIDCON_BLOCKMODE (1 << 17) -#define S3C2410_SDIDCON_WIDEBUS (1 << 16) -#define S3C2410_SDIDCON_DMAEN (1 << 15) -#define S3C2410_SDIDCON_STOP (1 << 14) -#define S3C2440_SDIDCON_DATSTART (1 << 14) - -#define S3C2410_SDIDCON_XFER_RXSTART (2 << 12) -#define S3C2410_SDIDCON_XFER_TXSTART (3 << 12) - -#define S3C2410_SDIDCON_BLKNUM_MASK (0xFFF) - -#define S3C2410_SDIDSTA_SDIOIRQDETECT (1 << 9) -#define S3C2410_SDIDSTA_FIFOFAIL (1 << 8) -#define S3C2410_SDIDSTA_CRCFAIL (1 << 7) -#define S3C2410_SDIDSTA_RXCRCFAIL (1 << 6) -#define S3C2410_SDIDSTA_DATATIMEOUT (1 << 5) -#define S3C2410_SDIDSTA_XFERFINISH (1 << 4) -#define S3C2410_SDIDSTA_TXDATAON (1 << 1) -#define S3C2410_SDIDSTA_RXDATAON (1 << 0) - -#define S3C2440_SDIFSTA_FIFORESET (1 << 16) -#define S3C2440_SDIFSTA_FIFOFAIL (3 << 14) -#define S3C2410_SDIFSTA_TFDET (1 << 13) -#define S3C2410_SDIFSTA_RFDET (1 << 12) -#define S3C2410_SDIFSTA_COUNTMASK (0x7f) - -#define S3C2410_SDIIMSK_RESPONSECRC (1 << 17) -#define S3C2410_SDIIMSK_CMDSENT (1 << 16) -#define S3C2410_SDIIMSK_CMDTIMEOUT (1 << 15) -#define S3C2410_SDIIMSK_RESPONSEND (1 << 14) -#define S3C2410_SDIIMSK_SDIOIRQ (1 << 12) -#define S3C2410_SDIIMSK_FIFOFAIL (1 << 11) -#define S3C2410_SDIIMSK_CRCSTATUS (1 << 10) -#define S3C2410_SDIIMSK_DATACRC (1 << 9) -#define S3C2410_SDIIMSK_DATATIMEOUT (1 << 8) -#define S3C2410_SDIIMSK_DATAFINISH (1 << 7) -#define S3C2410_SDIIMSK_TXFIFOHALF (1 << 4) -#define S3C2410_SDIIMSK_RXFIFOLAST (1 << 2) -#define S3C2410_SDIIMSK_RXFIFOHALF (1 << 0) - -enum dbg_channels { - dbg_err = (1 << 0), - dbg_debug = (1 << 1), - dbg_info = (1 << 2), - dbg_irq = (1 << 3), - dbg_sg = (1 << 4), - dbg_dma = (1 << 5), - dbg_pio = (1 << 6), - dbg_fail = (1 << 7), - dbg_conf = (1 << 8), -}; - -static const int dbgmap_err = dbg_fail; -static const int dbgmap_info = dbg_info | dbg_conf; -static const int dbgmap_debug = dbg_err | dbg_debug; - -#define dbg(host, channels, args...) \ - do { \ - if (dbgmap_err & channels) \ - dev_err(&host->pdev->dev, args); \ - else if (dbgmap_info & channels) \ - dev_info(&host->pdev->dev, args); \ - else if (dbgmap_debug & channels) \ - dev_dbg(&host->pdev->dev, args); \ - } while (0) - -static void finalize_request(struct s3cmci_host *host); -static void s3cmci_send_request(struct mmc_host *mmc); -static void s3cmci_reset(struct s3cmci_host *host); - -#ifdef CONFIG_MMC_DEBUG - -static void dbg_dumpregs(struct s3cmci_host *host, char *prefix) -{ - u32 con, pre, cmdarg, cmdcon, cmdsta, r0, r1, r2, r3, timer; - u32 datcon, datcnt, datsta, fsta; - - con = readl(host->base + S3C2410_SDICON); - pre = readl(host->base + S3C2410_SDIPRE); - cmdarg = readl(host->base + S3C2410_SDICMDARG); - cmdcon = readl(host->base + S3C2410_SDICMDCON); - cmdsta = readl(host->base + S3C2410_SDICMDSTAT); - r0 = readl(host->base + S3C2410_SDIRSP0); - r1 = readl(host->base + S3C2410_SDIRSP1); - r2 = readl(host->base + S3C2410_SDIRSP2); - r3 = readl(host->base + S3C2410_SDIRSP3); - timer = readl(host->base + S3C2410_SDITIMER); - datcon = readl(host->base + S3C2410_SDIDCON); - datcnt = readl(host->base + S3C2410_SDIDCNT); - datsta = readl(host->base + S3C2410_SDIDSTA); - fsta = readl(host->base + S3C2410_SDIFSTA); - - dbg(host, dbg_debug, "%s CON:[%08x] PRE:[%08x] TMR:[%08x]\n", - prefix, con, pre, timer); - - dbg(host, dbg_debug, "%s CCON:[%08x] CARG:[%08x] CSTA:[%08x]\n", - prefix, cmdcon, cmdarg, cmdsta); - - dbg(host, dbg_debug, "%s DCON:[%08x] FSTA:[%08x]" - " DSTA:[%08x] DCNT:[%08x]\n", - prefix, datcon, fsta, datsta, datcnt); - - dbg(host, dbg_debug, "%s R0:[%08x] R1:[%08x]" - " R2:[%08x] R3:[%08x]\n", - prefix, r0, r1, r2, r3); -} - -static void prepare_dbgmsg(struct s3cmci_host *host, struct mmc_command *cmd, - int stop) -{ - snprintf(host->dbgmsg_cmd, 300, - "#%u%s op:%i arg:0x%08x flags:0x08%x retries:%u", - host->ccnt, (stop ? " (STOP)" : ""), - cmd->opcode, cmd->arg, cmd->flags, cmd->retries); - - if (cmd->data) { - snprintf(host->dbgmsg_dat, 300, - "#%u bsize:%u blocks:%u bytes:%u", - host->dcnt, cmd->data->blksz, - cmd->data->blocks, - cmd->data->blocks * cmd->data->blksz); - } else { - host->dbgmsg_dat[0] = '\0'; - } -} - -static void dbg_dumpcmd(struct s3cmci_host *host, struct mmc_command *cmd, - int fail) -{ - unsigned int dbglvl = fail ? dbg_fail : dbg_debug; - - if (!cmd) - return; - - if (cmd->error == 0) { - dbg(host, dbglvl, "CMD[OK] %s R0:0x%08x\n", - host->dbgmsg_cmd, cmd->resp[0]); - } else { - dbg(host, dbglvl, "CMD[ERR %i] %s Status:%s\n", - cmd->error, host->dbgmsg_cmd, host->status); - } - - if (!cmd->data) - return; - - if (cmd->data->error == 0) { - dbg(host, dbglvl, "DAT[OK] %s\n", host->dbgmsg_dat); - } else { - dbg(host, dbglvl, "DAT[ERR %i] %s DCNT:0x%08x\n", - cmd->data->error, host->dbgmsg_dat, - readl(host->base + S3C2410_SDIDCNT)); - } -} -#else -static void dbg_dumpcmd(struct s3cmci_host *host, - struct mmc_command *cmd, int fail) { } - -static void prepare_dbgmsg(struct s3cmci_host *host, struct mmc_command *cmd, - int stop) { } - -static void dbg_dumpregs(struct s3cmci_host *host, char *prefix) { } - -#endif /* CONFIG_MMC_DEBUG */ - -/** - * s3cmci_host_usedma - return whether the host is using dma or pio - * @host: The host state - * - * Return true if the host is using DMA to transfer data, else false - * to use PIO mode. Will return static data depending on the driver - * configuration. - */ -static inline bool s3cmci_host_usedma(struct s3cmci_host *host) -{ -#ifdef CONFIG_MMC_S3C_PIO - return false; -#else /* CONFIG_MMC_S3C_DMA */ - return true; -#endif -} - -static inline u32 enable_imask(struct s3cmci_host *host, u32 imask) -{ - u32 newmask; - - newmask = readl(host->base + host->sdiimsk); - newmask |= imask; - - writel(newmask, host->base + host->sdiimsk); - - return newmask; -} - -static inline u32 disable_imask(struct s3cmci_host *host, u32 imask) -{ - u32 newmask; - - newmask = readl(host->base + host->sdiimsk); - newmask &= ~imask; - - writel(newmask, host->base + host->sdiimsk); - - return newmask; -} - -static inline void clear_imask(struct s3cmci_host *host) -{ - u32 mask = readl(host->base + host->sdiimsk); - - /* preserve the SDIO IRQ mask state */ - mask &= S3C2410_SDIIMSK_SDIOIRQ; - writel(mask, host->base + host->sdiimsk); -} - -/** - * s3cmci_check_sdio_irq - test whether the SDIO IRQ is being signalled - * @host: The host to check. - * - * Test to see if the SDIO interrupt is being signalled in case the - * controller has failed to re-detect a card interrupt. Read GPE8 and - * see if it is low and if so, signal a SDIO interrupt. - * - * This is currently called if a request is finished (we assume that the - * bus is now idle) and when the SDIO IRQ is enabled in case the IRQ is - * already being indicated. -*/ -static void s3cmci_check_sdio_irq(struct s3cmci_host *host) -{ - if (host->sdio_irqen) { - if (host->pdata->bus[3] && - gpiod_get_value(host->pdata->bus[3]) == 0) { - pr_debug("%s: signalling irq\n", __func__); - mmc_signal_sdio_irq(host->mmc); - } - } -} - -static inline int get_data_buffer(struct s3cmci_host *host, - u32 *bytes, u32 **pointer) -{ - struct scatterlist *sg; - - if (host->pio_active == XFER_NONE) - return -EINVAL; - - if ((!host->mrq) || (!host->mrq->data)) - return -EINVAL; - - if (host->pio_sgptr >= host->mrq->data->sg_len) { - dbg(host, dbg_debug, "no more buffers (%i/%i)\n", - host->pio_sgptr, host->mrq->data->sg_len); - return -EBUSY; - } - sg = &host->mrq->data->sg[host->pio_sgptr]; - - *bytes = sg->length; - *pointer = sg_virt(sg); - - host->pio_sgptr++; - - dbg(host, dbg_sg, "new buffer (%i/%i)\n", - host->pio_sgptr, host->mrq->data->sg_len); - - return 0; -} - -static inline u32 fifo_count(struct s3cmci_host *host) -{ - u32 fifostat = readl(host->base + S3C2410_SDIFSTA); - - fifostat &= S3C2410_SDIFSTA_COUNTMASK; - return fifostat; -} - -static inline u32 fifo_free(struct s3cmci_host *host) -{ - u32 fifostat = readl(host->base + S3C2410_SDIFSTA); - - fifostat &= S3C2410_SDIFSTA_COUNTMASK; - return 63 - fifostat; -} - -/** - * s3cmci_enable_irq - enable IRQ, after having disabled it. - * @host: The device state. - * @more: True if more IRQs are expected from transfer. - * - * Enable the main IRQ if needed after it has been disabled. - * - * The IRQ can be one of the following states: - * - disabled during IDLE - * - disabled whilst processing data - * - enabled during transfer - * - enabled whilst awaiting SDIO interrupt detection - */ -static void s3cmci_enable_irq(struct s3cmci_host *host, bool more) -{ - unsigned long flags; - bool enable = false; - - local_irq_save(flags); - - host->irq_enabled = more; - host->irq_disabled = false; - - enable = more | host->sdio_irqen; - - if (host->irq_state != enable) { - host->irq_state = enable; - - if (enable) - enable_irq(host->irq); - else - disable_irq(host->irq); - } - - local_irq_restore(flags); -} - -static void s3cmci_disable_irq(struct s3cmci_host *host, bool transfer) -{ - unsigned long flags; - - local_irq_save(flags); - - /* pr_debug("%s: transfer %d\n", __func__, transfer); */ - - host->irq_disabled = transfer; - - if (transfer && host->irq_state) { - host->irq_state = false; - disable_irq(host->irq); - } - - local_irq_restore(flags); -} - -static void do_pio_read(struct s3cmci_host *host) -{ - int res; - u32 fifo; - u32 *ptr; - u32 fifo_words; - void __iomem *from_ptr; - - /* write real prescaler to host, it might be set slow to fix */ - writel(host->prescaler, host->base + S3C2410_SDIPRE); - - from_ptr = host->base + host->sdidata; - - while ((fifo = fifo_count(host))) { - if (!host->pio_bytes) { - res = get_data_buffer(host, &host->pio_bytes, - &host->pio_ptr); - if (res) { - host->pio_active = XFER_NONE; - host->complete_what = COMPLETION_FINALIZE; - - dbg(host, dbg_pio, "pio_read(): " - "complete (no more data).\n"); - return; - } - - dbg(host, dbg_pio, - "pio_read(): new target: [%i]@[%p]\n", - host->pio_bytes, host->pio_ptr); - } - - dbg(host, dbg_pio, - "pio_read(): fifo:[%02i] buffer:[%03i] dcnt:[%08X]\n", - fifo, host->pio_bytes, - readl(host->base + S3C2410_SDIDCNT)); - - /* If we have reached the end of the block, we can - * read a word and get 1 to 3 bytes. If we in the - * middle of the block, we have to read full words, - * otherwise we will write garbage, so round down to - * an even multiple of 4. */ - if (fifo >= host->pio_bytes) - fifo = host->pio_bytes; - else - fifo -= fifo & 3; - - host->pio_bytes -= fifo; - host->pio_count += fifo; - - fifo_words = fifo >> 2; - ptr = host->pio_ptr; - while (fifo_words--) - *ptr++ = readl(from_ptr); - host->pio_ptr = ptr; - - if (fifo & 3) { - u32 n = fifo & 3; - u32 data = readl(from_ptr); - u8 *p = (u8 *)host->pio_ptr; - - while (n--) { - *p++ = data; - data >>= 8; - } - } - } - - if (!host->pio_bytes) { - res = get_data_buffer(host, &host->pio_bytes, &host->pio_ptr); - if (res) { - dbg(host, dbg_pio, - "pio_read(): complete (no more buffers).\n"); - host->pio_active = XFER_NONE; - host->complete_what = COMPLETION_FINALIZE; - - return; - } - } - - enable_imask(host, - S3C2410_SDIIMSK_RXFIFOHALF | S3C2410_SDIIMSK_RXFIFOLAST); -} - -static void do_pio_write(struct s3cmci_host *host) -{ - void __iomem *to_ptr; - int res; - u32 fifo; - u32 *ptr; - - to_ptr = host->base + host->sdidata; - - while ((fifo = fifo_free(host)) > 3) { - if (!host->pio_bytes) { - res = get_data_buffer(host, &host->pio_bytes, - &host->pio_ptr); - if (res) { - dbg(host, dbg_pio, - "pio_write(): complete (no more data).\n"); - host->pio_active = XFER_NONE; - - return; - } - - dbg(host, dbg_pio, - "pio_write(): new source: [%i]@[%p]\n", - host->pio_bytes, host->pio_ptr); - - } - - /* If we have reached the end of the block, we have to - * write exactly the remaining number of bytes. If we - * in the middle of the block, we have to write full - * words, so round down to an even multiple of 4. */ - if (fifo >= host->pio_bytes) - fifo = host->pio_bytes; - else - fifo -= fifo & 3; - - host->pio_bytes -= fifo; - host->pio_count += fifo; - - fifo = (fifo + 3) >> 2; - ptr = host->pio_ptr; - while (fifo--) - writel(*ptr++, to_ptr); - host->pio_ptr = ptr; - } - - enable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF); -} - -static void pio_tasklet(struct tasklet_struct *t) -{ - struct s3cmci_host *host = from_tasklet(host, t, pio_tasklet); - - s3cmci_disable_irq(host, true); - - if (host->pio_active == XFER_WRITE) - do_pio_write(host); - - if (host->pio_active == XFER_READ) - do_pio_read(host); - - if (host->complete_what == COMPLETION_FINALIZE) { - clear_imask(host); - if (host->pio_active != XFER_NONE) { - dbg(host, dbg_err, "unfinished %s " - "- pio_count:[%u] pio_bytes:[%u]\n", - (host->pio_active == XFER_READ) ? "read" : "write", - host->pio_count, host->pio_bytes); - - if (host->mrq->data) - host->mrq->data->error = -EINVAL; - } - - s3cmci_enable_irq(host, false); - finalize_request(host); - } else - s3cmci_enable_irq(host, true); -} - -/* - * ISR for SDI Interface IRQ - * Communication between driver and ISR works as follows: - * host->mrq points to current request - * host->complete_what Indicates when the request is considered done - * COMPLETION_CMDSENT when the command was sent - * COMPLETION_RSPFIN when a response was received - * COMPLETION_XFERFINISH when the data transfer is finished - * COMPLETION_XFERFINISH_RSPFIN both of the above. - * host->complete_request is the completion-object the driver waits for - * - * 1) Driver sets up host->mrq and host->complete_what - * 2) Driver prepares the transfer - * 3) Driver enables interrupts - * 4) Driver starts transfer - * 5) Driver waits for host->complete_rquest - * 6) ISR checks for request status (errors and success) - * 6) ISR sets host->mrq->cmd->error and host->mrq->data->error - * 7) ISR completes host->complete_request - * 8) ISR disables interrupts - * 9) Driver wakes up and takes care of the request - * - * Note: "->error"-fields are expected to be set to 0 before the request - * was issued by mmc.c - therefore they are only set, when an error - * contition comes up - */ - -static irqreturn_t s3cmci_irq(int irq, void *dev_id) -{ - struct s3cmci_host *host = dev_id; - struct mmc_command *cmd; - u32 mci_csta, mci_dsta, mci_fsta, mci_dcnt, mci_imsk; - u32 mci_cclear = 0, mci_dclear; - unsigned long iflags; - - mci_dsta = readl(host->base + S3C2410_SDIDSTA); - mci_imsk = readl(host->base + host->sdiimsk); - - if (mci_dsta & S3C2410_SDIDSTA_SDIOIRQDETECT) { - if (mci_imsk & S3C2410_SDIIMSK_SDIOIRQ) { - mci_dclear = S3C2410_SDIDSTA_SDIOIRQDETECT; - writel(mci_dclear, host->base + S3C2410_SDIDSTA); - - mmc_signal_sdio_irq(host->mmc); - return IRQ_HANDLED; - } - } - - spin_lock_irqsave(&host->complete_lock, iflags); - - mci_csta = readl(host->base + S3C2410_SDICMDSTAT); - mci_dcnt = readl(host->base + S3C2410_SDIDCNT); - mci_fsta = readl(host->base + S3C2410_SDIFSTA); - mci_dclear = 0; - - if ((host->complete_what == COMPLETION_NONE) || - (host->complete_what == COMPLETION_FINALIZE)) { - host->status = "nothing to complete"; - clear_imask(host); - goto irq_out; - } - - if (!host->mrq) { - host->status = "no active mrq"; - clear_imask(host); - goto irq_out; - } - - cmd = host->cmd_is_stop ? host->mrq->stop : host->mrq->cmd; - - if (!cmd) { - host->status = "no active cmd"; - clear_imask(host); - goto irq_out; - } - - if (!s3cmci_host_usedma(host)) { - if ((host->pio_active == XFER_WRITE) && - (mci_fsta & S3C2410_SDIFSTA_TFDET)) { - - disable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF); - tasklet_schedule(&host->pio_tasklet); - host->status = "pio tx"; - } - - if ((host->pio_active == XFER_READ) && - (mci_fsta & S3C2410_SDIFSTA_RFDET)) { - - disable_imask(host, - S3C2410_SDIIMSK_RXFIFOHALF | - S3C2410_SDIIMSK_RXFIFOLAST); - - tasklet_schedule(&host->pio_tasklet); - host->status = "pio rx"; - } - } - - if (mci_csta & S3C2410_SDICMDSTAT_CMDTIMEOUT) { - dbg(host, dbg_err, "CMDSTAT: error CMDTIMEOUT\n"); - cmd->error = -ETIMEDOUT; - host->status = "error: command timeout"; - goto fail_transfer; - } - - if (mci_csta & S3C2410_SDICMDSTAT_CMDSENT) { - if (host->complete_what == COMPLETION_CMDSENT) { - host->status = "ok: command sent"; - goto close_transfer; - } - - mci_cclear |= S3C2410_SDICMDSTAT_CMDSENT; - } - - if (mci_csta & S3C2410_SDICMDSTAT_CRCFAIL) { - if (cmd->flags & MMC_RSP_CRC) { - if (host->mrq->cmd->flags & MMC_RSP_136) { - dbg(host, dbg_irq, - "fixup: ignore CRC fail with long rsp\n"); - } else { - /* note, we used to fail the transfer - * here, but it seems that this is just - * the hardware getting it wrong. - * - * cmd->error = -EILSEQ; - * host->status = "error: bad command crc"; - * goto fail_transfer; - */ - } - } - - mci_cclear |= S3C2410_SDICMDSTAT_CRCFAIL; - } - - if (mci_csta & S3C2410_SDICMDSTAT_RSPFIN) { - if (host->complete_what == COMPLETION_RSPFIN) { - host->status = "ok: command response received"; - goto close_transfer; - } - - if (host->complete_what == COMPLETION_XFERFINISH_RSPFIN) - host->complete_what = COMPLETION_XFERFINISH; - - mci_cclear |= S3C2410_SDICMDSTAT_RSPFIN; - } - - /* errors handled after this point are only relevant - when a data transfer is in progress */ - - if (!cmd->data) - goto clear_status_bits; - - /* Check for FIFO failure */ - if (host->is2440) { - if (mci_fsta & S3C2440_SDIFSTA_FIFOFAIL) { - dbg(host, dbg_err, "FIFO failure\n"); - host->mrq->data->error = -EILSEQ; - host->status = "error: 2440 fifo failure"; - goto fail_transfer; - } - } else { - if (mci_dsta & S3C2410_SDIDSTA_FIFOFAIL) { - dbg(host, dbg_err, "FIFO failure\n"); - cmd->data->error = -EILSEQ; - host->status = "error: fifo failure"; - goto fail_transfer; - } - } - - if (mci_dsta & S3C2410_SDIDSTA_RXCRCFAIL) { - dbg(host, dbg_err, "bad data crc (outgoing)\n"); - cmd->data->error = -EILSEQ; - host->status = "error: bad data crc (outgoing)"; - goto fail_transfer; - } - - if (mci_dsta & S3C2410_SDIDSTA_CRCFAIL) { - dbg(host, dbg_err, "bad data crc (incoming)\n"); - cmd->data->error = -EILSEQ; - host->status = "error: bad data crc (incoming)"; - goto fail_transfer; - } - - if (mci_dsta & S3C2410_SDIDSTA_DATATIMEOUT) { - dbg(host, dbg_err, "data timeout\n"); - cmd->data->error = -ETIMEDOUT; - host->status = "error: data timeout"; - goto fail_transfer; - } - - if (mci_dsta & S3C2410_SDIDSTA_XFERFINISH) { - if (host->complete_what == COMPLETION_XFERFINISH) { - host->status = "ok: data transfer completed"; - goto close_transfer; - } - - if (host->complete_what == COMPLETION_XFERFINISH_RSPFIN) - host->complete_what = COMPLETION_RSPFIN; - - mci_dclear |= S3C2410_SDIDSTA_XFERFINISH; - } - -clear_status_bits: - writel(mci_cclear, host->base + S3C2410_SDICMDSTAT); - writel(mci_dclear, host->base + S3C2410_SDIDSTA); - - goto irq_out; - -fail_transfer: - host->pio_active = XFER_NONE; - -close_transfer: - host->complete_what = COMPLETION_FINALIZE; - - clear_imask(host); - tasklet_schedule(&host->pio_tasklet); - - goto irq_out; - -irq_out: - dbg(host, dbg_irq, - "csta:0x%08x dsta:0x%08x fsta:0x%08x dcnt:0x%08x status:%s.\n", - mci_csta, mci_dsta, mci_fsta, mci_dcnt, host->status); - - spin_unlock_irqrestore(&host->complete_lock, iflags); - return IRQ_HANDLED; - -} - -static void s3cmci_dma_done_callback(void *arg) -{ - struct s3cmci_host *host = arg; - unsigned long iflags; - - BUG_ON(!host->mrq); - BUG_ON(!host->mrq->data); - - spin_lock_irqsave(&host->complete_lock, iflags); - - dbg(host, dbg_dma, "DMA FINISHED\n"); - - host->dma_complete = 1; - host->complete_what = COMPLETION_FINALIZE; - - tasklet_schedule(&host->pio_tasklet); - spin_unlock_irqrestore(&host->complete_lock, iflags); - -} - -static void finalize_request(struct s3cmci_host *host) -{ - struct mmc_request *mrq = host->mrq; - struct mmc_command *cmd; - int debug_as_failure = 0; - - if (host->complete_what != COMPLETION_FINALIZE) - return; - - if (!mrq) - return; - cmd = host->cmd_is_stop ? mrq->stop : mrq->cmd; - - if (cmd->data && (cmd->error == 0) && - (cmd->data->error == 0)) { - if (s3cmci_host_usedma(host) && (!host->dma_complete)) { - dbg(host, dbg_dma, "DMA Missing (%d)!\n", - host->dma_complete); - return; - } - } - - /* Read response from controller. */ - cmd->resp[0] = readl(host->base + S3C2410_SDIRSP0); - cmd->resp[1] = readl(host->base + S3C2410_SDIRSP1); - cmd->resp[2] = readl(host->base + S3C2410_SDIRSP2); - cmd->resp[3] = readl(host->base + S3C2410_SDIRSP3); - - writel(host->prescaler, host->base + S3C2410_SDIPRE); - - if (cmd->error) - debug_as_failure = 1; - - if (cmd->data && cmd->data->error) - debug_as_failure = 1; - - dbg_dumpcmd(host, cmd, debug_as_failure); - - /* Cleanup controller */ - writel(0, host->base + S3C2410_SDICMDARG); - writel(S3C2410_SDIDCON_STOP, host->base + S3C2410_SDIDCON); - writel(0, host->base + S3C2410_SDICMDCON); - clear_imask(host); - - if (cmd->data && cmd->error) - cmd->data->error = cmd->error; - - if (cmd->data && cmd->data->stop && (!host->cmd_is_stop)) { - host->cmd_is_stop = 1; - s3cmci_send_request(host->mmc); - return; - } - - /* If we have no data transfer we are finished here */ - if (!mrq->data) - goto request_done; - - /* Calculate the amout of bytes transfer if there was no error */ - if (mrq->data->error == 0) { - mrq->data->bytes_xfered = - (mrq->data->blocks * mrq->data->blksz); - } else { - mrq->data->bytes_xfered = 0; - } - - /* If we had an error while transferring data we flush the - * DMA channel and the fifo to clear out any garbage. */ - if (mrq->data->error != 0) { - if (s3cmci_host_usedma(host)) - dmaengine_terminate_all(host->dma); - - if (host->is2440) { - /* Clear failure register and reset fifo. */ - writel(S3C2440_SDIFSTA_FIFORESET | - S3C2440_SDIFSTA_FIFOFAIL, - host->base + S3C2410_SDIFSTA); - } else { - u32 mci_con; - - /* reset fifo */ - mci_con = readl(host->base + S3C2410_SDICON); - mci_con |= S3C2410_SDICON_FIFORESET; - - writel(mci_con, host->base + S3C2410_SDICON); - } - } - -request_done: - host->complete_what = COMPLETION_NONE; - host->mrq = NULL; - - s3cmci_check_sdio_irq(host); - mmc_request_done(host->mmc, mrq); -} - -static void s3cmci_send_command(struct s3cmci_host *host, - struct mmc_command *cmd) -{ - u32 ccon, imsk; - - imsk = S3C2410_SDIIMSK_CRCSTATUS | S3C2410_SDIIMSK_CMDTIMEOUT | - S3C2410_SDIIMSK_RESPONSEND | S3C2410_SDIIMSK_CMDSENT | - S3C2410_SDIIMSK_RESPONSECRC; - - enable_imask(host, imsk); - - if (cmd->data) - host->complete_what = COMPLETION_XFERFINISH_RSPFIN; - else if (cmd->flags & MMC_RSP_PRESENT) - host->complete_what = COMPLETION_RSPFIN; - else - host->complete_what = COMPLETION_CMDSENT; - - writel(cmd->arg, host->base + S3C2410_SDICMDARG); - - ccon = cmd->opcode & S3C2410_SDICMDCON_INDEX; - ccon |= S3C2410_SDICMDCON_SENDERHOST | S3C2410_SDICMDCON_CMDSTART; - - if (cmd->flags & MMC_RSP_PRESENT) - ccon |= S3C2410_SDICMDCON_WAITRSP; - - if (cmd->flags & MMC_RSP_136) - ccon |= S3C2410_SDICMDCON_LONGRSP; - - writel(ccon, host->base + S3C2410_SDICMDCON); -} - -static int s3cmci_setup_data(struct s3cmci_host *host, struct mmc_data *data) -{ - u32 dcon, imsk, stoptries = 3; - - if ((data->blksz & 3) != 0) { - /* We cannot deal with unaligned blocks with more than - * one block being transferred. */ - - if (data->blocks > 1) { - pr_warn("%s: can't do non-word sized block transfers (blksz %d)\n", - __func__, data->blksz); - return -EINVAL; - } - } - - while (readl(host->base + S3C2410_SDIDSTA) & - (S3C2410_SDIDSTA_TXDATAON | S3C2410_SDIDSTA_RXDATAON)) { - - dbg(host, dbg_err, - "mci_setup_data() transfer stillin progress.\n"); - - writel(S3C2410_SDIDCON_STOP, host->base + S3C2410_SDIDCON); - s3cmci_reset(host); - - if ((stoptries--) == 0) { - dbg_dumpregs(host, "DRF"); - return -EINVAL; - } - } - - dcon = data->blocks & S3C2410_SDIDCON_BLKNUM_MASK; - - if (s3cmci_host_usedma(host)) - dcon |= S3C2410_SDIDCON_DMAEN; - - if (host->bus_width == MMC_BUS_WIDTH_4) - dcon |= S3C2410_SDIDCON_WIDEBUS; - - dcon |= S3C2410_SDIDCON_BLOCKMODE; - - if (data->flags & MMC_DATA_WRITE) { - dcon |= S3C2410_SDIDCON_TXAFTERRESP; - dcon |= S3C2410_SDIDCON_XFER_TXSTART; - } - - if (data->flags & MMC_DATA_READ) { - dcon |= S3C2410_SDIDCON_RXAFTERCMD; - dcon |= S3C2410_SDIDCON_XFER_RXSTART; - } - - if (host->is2440) { - dcon |= S3C2440_SDIDCON_DS_WORD; - dcon |= S3C2440_SDIDCON_DATSTART; - } - - writel(dcon, host->base + S3C2410_SDIDCON); - - /* write BSIZE register */ - - writel(data->blksz, host->base + S3C2410_SDIBSIZE); - - /* add to IMASK register */ - imsk = S3C2410_SDIIMSK_FIFOFAIL | S3C2410_SDIIMSK_DATACRC | - S3C2410_SDIIMSK_DATATIMEOUT | S3C2410_SDIIMSK_DATAFINISH; - - enable_imask(host, imsk); - - /* write TIMER register */ - - if (host->is2440) { - writel(0x007FFFFF, host->base + S3C2410_SDITIMER); - } else { - writel(0x0000FFFF, host->base + S3C2410_SDITIMER); - - /* FIX: set slow clock to prevent timeouts on read */ - if (data->flags & MMC_DATA_READ) - writel(0xFF, host->base + S3C2410_SDIPRE); - } - - return 0; -} - -#define BOTH_DIR (MMC_DATA_WRITE | MMC_DATA_READ) - -static int s3cmci_prepare_pio(struct s3cmci_host *host, struct mmc_data *data) -{ - int rw = (data->flags & MMC_DATA_WRITE) ? 1 : 0; - - BUG_ON((data->flags & BOTH_DIR) == BOTH_DIR); - - host->pio_sgptr = 0; - host->pio_bytes = 0; - host->pio_count = 0; - host->pio_active = rw ? XFER_WRITE : XFER_READ; - - if (rw) { - do_pio_write(host); - enable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF); - } else { - enable_imask(host, S3C2410_SDIIMSK_RXFIFOHALF - | S3C2410_SDIIMSK_RXFIFOLAST); - } - - return 0; -} - -static int s3cmci_prepare_dma(struct s3cmci_host *host, struct mmc_data *data) -{ - int rw = data->flags & MMC_DATA_WRITE; - struct dma_async_tx_descriptor *desc; - struct dma_slave_config conf = { - .src_addr = host->mem->start + host->sdidata, - .dst_addr = host->mem->start + host->sdidata, - .src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, - .dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES, - }; - - BUG_ON((data->flags & BOTH_DIR) == BOTH_DIR); - - /* Restore prescaler value */ - writel(host->prescaler, host->base + S3C2410_SDIPRE); - - if (!rw) - conf.direction = DMA_DEV_TO_MEM; - else - conf.direction = DMA_MEM_TO_DEV; - - dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len, - mmc_get_dma_dir(data)); - - dmaengine_slave_config(host->dma, &conf); - desc = dmaengine_prep_slave_sg(host->dma, data->sg, data->sg_len, - conf.direction, - DMA_CTRL_ACK | DMA_PREP_INTERRUPT); - if (!desc) - goto unmap_exit; - desc->callback = s3cmci_dma_done_callback; - desc->callback_param = host; - dmaengine_submit(desc); - dma_async_issue_pending(host->dma); - - return 0; - -unmap_exit: - dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, - mmc_get_dma_dir(data)); - return -ENOMEM; -} - -static void s3cmci_send_request(struct mmc_host *mmc) -{ - struct s3cmci_host *host = mmc_priv(mmc); - struct mmc_request *mrq = host->mrq; - struct mmc_command *cmd = host->cmd_is_stop ? mrq->stop : mrq->cmd; - - host->ccnt++; - prepare_dbgmsg(host, cmd, host->cmd_is_stop); - - /* Clear command, data and fifo status registers - Fifo clear only necessary on 2440, but doesn't hurt on 2410 - */ - writel(0xFFFFFFFF, host->base + S3C2410_SDICMDSTAT); - writel(0xFFFFFFFF, host->base + S3C2410_SDIDSTA); - writel(0xFFFFFFFF, host->base + S3C2410_SDIFSTA); - - if (cmd->data) { - int res = s3cmci_setup_data(host, cmd->data); - - host->dcnt++; - - if (res) { - dbg(host, dbg_err, "setup data error %d\n", res); - cmd->error = res; - cmd->data->error = res; - - mmc_request_done(mmc, mrq); - return; - } - - if (s3cmci_host_usedma(host)) - res = s3cmci_prepare_dma(host, cmd->data); - else - res = s3cmci_prepare_pio(host, cmd->data); - - if (res) { - dbg(host, dbg_err, "data prepare error %d\n", res); - cmd->error = res; - cmd->data->error = res; - - mmc_request_done(mmc, mrq); - return; - } - } - - /* Send command */ - s3cmci_send_command(host, cmd); - - /* Enable Interrupt */ - s3cmci_enable_irq(host, true); -} - -static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq) -{ - struct s3cmci_host *host = mmc_priv(mmc); - - host->status = "mmc request"; - host->cmd_is_stop = 0; - host->mrq = mrq; - - if (mmc_gpio_get_cd(mmc) == 0) { - dbg(host, dbg_err, "%s: no medium present\n", __func__); - host->mrq->cmd->error = -ENOMEDIUM; - mmc_request_done(mmc, mrq); - } else - s3cmci_send_request(mmc); -} - -static void s3cmci_set_clk(struct s3cmci_host *host, struct mmc_ios *ios) -{ - u32 mci_psc; - - /* Set clock */ - for (mci_psc = 0; mci_psc < 255; mci_psc++) { - host->real_rate = host->clk_rate / (host->clk_div*(mci_psc+1)); - - if (host->real_rate <= ios->clock) - break; - } - - if (mci_psc > 255) - mci_psc = 255; - - host->prescaler = mci_psc; - writel(host->prescaler, host->base + S3C2410_SDIPRE); - - /* If requested clock is 0, real_rate will be 0, too */ - if (ios->clock == 0) - host->real_rate = 0; -} - -static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) -{ - struct s3cmci_host *host = mmc_priv(mmc); - u32 mci_con; - - /* Set the power state */ - - mci_con = readl(host->base + S3C2410_SDICON); - - switch (ios->power_mode) { - case MMC_POWER_ON: - case MMC_POWER_UP: - if (!host->is2440) - mci_con |= S3C2410_SDICON_FIFORESET; - break; - - case MMC_POWER_OFF: - default: - if (host->is2440) - mci_con |= S3C2440_SDICON_SDRESET; - break; - } - - if (host->pdata->set_power) - host->pdata->set_power(ios->power_mode, ios->vdd); - - s3cmci_set_clk(host, ios); - - /* Set CLOCK_ENABLE */ - if (ios->clock) - mci_con |= S3C2410_SDICON_CLOCKTYPE; - else - mci_con &= ~S3C2410_SDICON_CLOCKTYPE; - - writel(mci_con, host->base + S3C2410_SDICON); - - if ((ios->power_mode == MMC_POWER_ON) || - (ios->power_mode == MMC_POWER_UP)) { - dbg(host, dbg_conf, "running at %lukHz (requested: %ukHz).\n", - host->real_rate/1000, ios->clock/1000); - } else { - dbg(host, dbg_conf, "powered down.\n"); - } - - host->bus_width = ios->bus_width; -} - -static void s3cmci_reset(struct s3cmci_host *host) -{ - u32 con = readl(host->base + S3C2410_SDICON); - - con |= S3C2440_SDICON_SDRESET; - writel(con, host->base + S3C2410_SDICON); -} - -static void s3cmci_enable_sdio_irq(struct mmc_host *mmc, int enable) -{ - struct s3cmci_host *host = mmc_priv(mmc); - unsigned long flags; - u32 con; - - local_irq_save(flags); - - con = readl(host->base + S3C2410_SDICON); - host->sdio_irqen = enable; - - if (enable == host->sdio_irqen) - goto same_state; - - if (enable) { - con |= S3C2410_SDICON_SDIOIRQ; - enable_imask(host, S3C2410_SDIIMSK_SDIOIRQ); - - if (!host->irq_state && !host->irq_disabled) { - host->irq_state = true; - enable_irq(host->irq); - } - } else { - disable_imask(host, S3C2410_SDIIMSK_SDIOIRQ); - con &= ~S3C2410_SDICON_SDIOIRQ; - - if (!host->irq_enabled && host->irq_state) { - disable_irq_nosync(host->irq); - host->irq_state = false; - } - } - - writel(con, host->base + S3C2410_SDICON); - - same_state: - local_irq_restore(flags); - - s3cmci_check_sdio_irq(host); -} - -static const struct mmc_host_ops s3cmci_ops = { - .request = s3cmci_request, - .set_ios = s3cmci_set_ios, - .get_ro = mmc_gpio_get_ro, - .get_cd = mmc_gpio_get_cd, - .enable_sdio_irq = s3cmci_enable_sdio_irq, -}; - -#ifdef CONFIG_ARM_S3C24XX_CPUFREQ - -static int s3cmci_cpufreq_transition(struct notifier_block *nb, - unsigned long val, void *data) -{ - struct s3cmci_host *host; - struct mmc_host *mmc; - unsigned long newclk; - unsigned long flags; - - host = container_of(nb, struct s3cmci_host, freq_transition); - newclk = clk_get_rate(host->clk); - mmc = host->mmc; - - if ((val == CPUFREQ_PRECHANGE && newclk > host->clk_rate) || - (val == CPUFREQ_POSTCHANGE && newclk < host->clk_rate)) { - spin_lock_irqsave(&mmc->lock, flags); - - host->clk_rate = newclk; - - if (mmc->ios.power_mode != MMC_POWER_OFF && - mmc->ios.clock != 0) - s3cmci_set_clk(host, &mmc->ios); - - spin_unlock_irqrestore(&mmc->lock, flags); - } - - return 0; -} - -static inline int s3cmci_cpufreq_register(struct s3cmci_host *host) -{ - host->freq_transition.notifier_call = s3cmci_cpufreq_transition; - - return cpufreq_register_notifier(&host->freq_transition, - CPUFREQ_TRANSITION_NOTIFIER); -} - -static inline void s3cmci_cpufreq_deregister(struct s3cmci_host *host) -{ - cpufreq_unregister_notifier(&host->freq_transition, - CPUFREQ_TRANSITION_NOTIFIER); -} - -#else -static inline int s3cmci_cpufreq_register(struct s3cmci_host *host) -{ - return 0; -} - -static inline void s3cmci_cpufreq_deregister(struct s3cmci_host *host) -{ -} -#endif - - -#ifdef CONFIG_DEBUG_FS - -static int s3cmci_state_show(struct seq_file *seq, void *v) -{ - struct s3cmci_host *host = seq->private; - - seq_printf(seq, "Register base = 0x%p\n", host->base); - seq_printf(seq, "Clock rate = %ld\n", host->clk_rate); - seq_printf(seq, "Prescale = %d\n", host->prescaler); - seq_printf(seq, "is2440 = %d\n", host->is2440); - seq_printf(seq, "IRQ = %d\n", host->irq); - seq_printf(seq, "IRQ enabled = %d\n", host->irq_enabled); - seq_printf(seq, "IRQ disabled = %d\n", host->irq_disabled); - seq_printf(seq, "IRQ state = %d\n", host->irq_state); - seq_printf(seq, "CD IRQ = %d\n", host->irq_cd); - seq_printf(seq, "Do DMA = %d\n", s3cmci_host_usedma(host)); - seq_printf(seq, "SDIIMSK at %d\n", host->sdiimsk); - seq_printf(seq, "SDIDATA at %d\n", host->sdidata); - - return 0; -} - -DEFINE_SHOW_ATTRIBUTE(s3cmci_state); - -#define DBG_REG(_r) { .addr = S3C2410_SDI##_r, .name = #_r } - -struct s3cmci_reg { - unsigned short addr; - unsigned char *name; -}; - -static const struct s3cmci_reg debug_regs[] = { - DBG_REG(CON), - DBG_REG(PRE), - DBG_REG(CMDARG), - DBG_REG(CMDCON), - DBG_REG(CMDSTAT), - DBG_REG(RSP0), - DBG_REG(RSP1), - DBG_REG(RSP2), - DBG_REG(RSP3), - DBG_REG(TIMER), - DBG_REG(BSIZE), - DBG_REG(DCON), - DBG_REG(DCNT), - DBG_REG(DSTA), - DBG_REG(FSTA), - {} -}; - -static int s3cmci_regs_show(struct seq_file *seq, void *v) -{ - struct s3cmci_host *host = seq->private; - const struct s3cmci_reg *rptr = debug_regs; - - for (; rptr->name; rptr++) - seq_printf(seq, "SDI%s\t=0x%08x\n", rptr->name, - readl(host->base + rptr->addr)); - - seq_printf(seq, "SDIIMSK\t=0x%08x\n", readl(host->base + host->sdiimsk)); - - return 0; -} - -DEFINE_SHOW_ATTRIBUTE(s3cmci_regs); - -static void s3cmci_debugfs_attach(struct s3cmci_host *host) -{ - struct device *dev = &host->pdev->dev; - struct dentry *root; - - root = debugfs_create_dir(dev_name(dev), NULL); - host->debug_root = root; - - debugfs_create_file("state", 0444, root, host, &s3cmci_state_fops); - debugfs_create_file("regs", 0444, root, host, &s3cmci_regs_fops); -} - -static void s3cmci_debugfs_remove(struct s3cmci_host *host) -{ - debugfs_remove_recursive(host->debug_root); -} - -#else -static inline void s3cmci_debugfs_attach(struct s3cmci_host *host) { } -static inline void s3cmci_debugfs_remove(struct s3cmci_host *host) { } - -#endif /* CONFIG_DEBUG_FS */ - -static int s3cmci_probe_pdata(struct s3cmci_host *host) -{ - struct platform_device *pdev = host->pdev; - struct mmc_host *mmc = host->mmc; - struct s3c24xx_mci_pdata *pdata; - int i, ret; - - host->is2440 = platform_get_device_id(pdev)->driver_data; - pdata = pdev->dev.platform_data; - if (!pdata) { - dev_err(&pdev->dev, "need platform data"); - return -ENXIO; - } - - for (i = 0; i < 6; i++) { - pdata->bus[i] = devm_gpiod_get_index(&pdev->dev, "bus", i, - GPIOD_OUT_LOW); - if (IS_ERR(pdata->bus[i])) { - dev_err(&pdev->dev, "failed to get gpio %d\n", i); - return PTR_ERR(pdata->bus[i]); - } - } - - if (pdata->no_wprotect) - mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT; - - if (pdata->no_detect) - mmc->caps |= MMC_CAP_NEEDS_POLL; - - if (pdata->wprotect_invert) - mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH; - - /* If we get -ENOENT we have no card detect GPIO line */ - ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0); - if (ret != -ENOENT) { - dev_err(&pdev->dev, "error requesting GPIO for CD %d\n", - ret); - return ret; - } - - ret = mmc_gpiod_request_ro(host->mmc, "wp", 0, 0); - if (ret != -ENOENT) { - dev_err(&pdev->dev, "error requesting GPIO for WP %d\n", - ret); - return ret; - } - - return 0; -} - -static int s3cmci_probe_dt(struct s3cmci_host *host) -{ - struct platform_device *pdev = host->pdev; - struct s3c24xx_mci_pdata *pdata; - struct mmc_host *mmc = host->mmc; - int ret; - - host->is2440 = (long) of_device_get_match_data(&pdev->dev); - - ret = mmc_of_parse(mmc); - if (ret) - return ret; - - pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); - if (!pdata) - return -ENOMEM; - - pdev->dev.platform_data = pdata; - - return 0; -} - -static int s3cmci_probe(struct platform_device *pdev) -{ - struct s3cmci_host *host; - struct mmc_host *mmc; - int ret; - - mmc = mmc_alloc_host(sizeof(struct s3cmci_host), &pdev->dev); - if (!mmc) { - ret = -ENOMEM; - goto probe_out; - } - - host = mmc_priv(mmc); - host->mmc = mmc; - host->pdev = pdev; - - if (pdev->dev.of_node) - ret = s3cmci_probe_dt(host); - else - ret = s3cmci_probe_pdata(host); - - if (ret) - goto probe_free_host; - - host->pdata = pdev->dev.platform_data; - - spin_lock_init(&host->complete_lock); - tasklet_setup(&host->pio_tasklet, pio_tasklet); - - if (host->is2440) { - host->sdiimsk = S3C2440_SDIIMSK; - host->sdidata = S3C2440_SDIDATA; - host->clk_div = 1; - } else { - host->sdiimsk = S3C2410_SDIIMSK; - host->sdidata = S3C2410_SDIDATA; - host->clk_div = 2; - } - - host->complete_what = COMPLETION_NONE; - host->pio_active = XFER_NONE; - - host->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!host->mem) { - dev_err(&pdev->dev, - "failed to get io memory region resource.\n"); - - ret = -ENOENT; - goto probe_free_host; - } - - host->mem = request_mem_region(host->mem->start, - resource_size(host->mem), pdev->name); - - if (!host->mem) { - dev_err(&pdev->dev, "failed to request io memory region.\n"); - ret = -ENOENT; - goto probe_free_host; - } - - host->base = ioremap(host->mem->start, resource_size(host->mem)); - if (!host->base) { - dev_err(&pdev->dev, "failed to ioremap() io memory region.\n"); - ret = -EINVAL; - goto probe_free_mem_region; - } - - host->irq = platform_get_irq(pdev, 0); - if (host->irq <= 0) { - ret = -EINVAL; - goto probe_iounmap; - } - - if (request_irq(host->irq, s3cmci_irq, IRQF_NO_AUTOEN, DRIVER_NAME, host)) { - dev_err(&pdev->dev, "failed to request mci interrupt.\n"); - ret = -ENOENT; - goto probe_iounmap; - } - - host->irq_state = false; - - /* Depending on the dma state, get a DMA channel to use. */ - - if (s3cmci_host_usedma(host)) { - host->dma = dma_request_chan(&pdev->dev, "rx-tx"); - ret = PTR_ERR_OR_ZERO(host->dma); - if (ret) { - dev_err(&pdev->dev, "cannot get DMA channel.\n"); - goto probe_free_irq; - } - } - - host->clk = clk_get(&pdev->dev, "sdi"); - if (IS_ERR(host->clk)) { - dev_err(&pdev->dev, "failed to find clock source.\n"); - ret = PTR_ERR(host->clk); - host->clk = NULL; - goto probe_free_dma; - } - - ret = clk_prepare_enable(host->clk); - if (ret) { - dev_err(&pdev->dev, "failed to enable clock source.\n"); - goto clk_free; - } - - host->clk_rate = clk_get_rate(host->clk); - - mmc->ops = &s3cmci_ops; - mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; -#ifdef CONFIG_MMC_S3C_HW_SDIO_IRQ - mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; -#else - mmc->caps = MMC_CAP_4_BIT_DATA; -#endif - mmc->f_min = host->clk_rate / (host->clk_div * 256); - mmc->f_max = host->clk_rate / host->clk_div; - - if (host->pdata->ocr_avail) - mmc->ocr_avail = host->pdata->ocr_avail; - - mmc->max_blk_count = 4095; - mmc->max_blk_size = 4095; - mmc->max_req_size = 4095 * 512; - mmc->max_seg_size = mmc->max_req_size; - - mmc->max_segs = 128; - - dbg(host, dbg_debug, - "probe: mode:%s mapped mci_base:%p irq:%u irq_cd:%u dma:%p.\n", - (host->is2440?"2440":""), - host->base, host->irq, host->irq_cd, host->dma); - - ret = s3cmci_cpufreq_register(host); - if (ret) { - dev_err(&pdev->dev, "failed to register cpufreq\n"); - goto free_dmabuf; - } - - ret = mmc_add_host(mmc); - if (ret) { - dev_err(&pdev->dev, "failed to add mmc host.\n"); - goto free_cpufreq; - } - - s3cmci_debugfs_attach(host); - - platform_set_drvdata(pdev, mmc); - dev_info(&pdev->dev, "%s - using %s, %s SDIO IRQ\n", mmc_hostname(mmc), - s3cmci_host_usedma(host) ? "dma" : "pio", - mmc->caps & MMC_CAP_SDIO_IRQ ? "hw" : "sw"); - - return 0; - - free_cpufreq: - s3cmci_cpufreq_deregister(host); - - free_dmabuf: - clk_disable_unprepare(host->clk); - - clk_free: - clk_put(host->clk); - - probe_free_dma: - if (s3cmci_host_usedma(host)) - dma_release_channel(host->dma); - - probe_free_irq: - free_irq(host->irq, host); - - probe_iounmap: - iounmap(host->base); - - probe_free_mem_region: - release_mem_region(host->mem->start, resource_size(host->mem)); - - probe_free_host: - mmc_free_host(mmc); - - probe_out: - return ret; -} - -static void s3cmci_shutdown(struct platform_device *pdev) -{ - struct mmc_host *mmc = platform_get_drvdata(pdev); - struct s3cmci_host *host = mmc_priv(mmc); - - if (host->irq_cd >= 0) - free_irq(host->irq_cd, host); - - s3cmci_debugfs_remove(host); - s3cmci_cpufreq_deregister(host); - mmc_remove_host(mmc); - clk_disable_unprepare(host->clk); -} - -static int s3cmci_remove(struct platform_device *pdev) -{ - struct mmc_host *mmc = platform_get_drvdata(pdev); - struct s3cmci_host *host = mmc_priv(mmc); - - s3cmci_shutdown(pdev); - - clk_put(host->clk); - - tasklet_disable(&host->pio_tasklet); - - if (s3cmci_host_usedma(host)) - dma_release_channel(host->dma); - - free_irq(host->irq, host); - - iounmap(host->base); - release_mem_region(host->mem->start, resource_size(host->mem)); - - mmc_free_host(mmc); - return 0; -} - -static const struct of_device_id s3cmci_dt_match[] = { - { - .compatible = "samsung,s3c2410-sdi", - .data = (void *)0, - }, - { - .compatible = "samsung,s3c2412-sdi", - .data = (void *)1, - }, - { - .compatible = "samsung,s3c2440-sdi", - .data = (void *)1, - }, - { /* sentinel */ }, -}; -MODULE_DEVICE_TABLE(of, s3cmci_dt_match); - -static const struct platform_device_id s3cmci_driver_ids[] = { - { - .name = "s3c2410-sdi", - .driver_data = 0, - }, { - .name = "s3c2412-sdi", - .driver_data = 1, - }, { - .name = "s3c2440-sdi", - .driver_data = 1, - }, - { } -}; - -MODULE_DEVICE_TABLE(platform, s3cmci_driver_ids); - -static struct platform_driver s3cmci_driver = { - .driver = { - .name = "s3c-sdi", - .probe_type = PROBE_PREFER_ASYNCHRONOUS, - .of_match_table = s3cmci_dt_match, - }, - .id_table = s3cmci_driver_ids, - .probe = s3cmci_probe, - .remove = s3cmci_remove, - .shutdown = s3cmci_shutdown, -}; - -module_platform_driver(s3cmci_driver); - -MODULE_DESCRIPTION("Samsung S3C MMC/SD Card Interface driver"); -MODULE_LICENSE("GPL v2"); -MODULE_AUTHOR("Thomas Kleffel <tk@maintech.de>, Ben Dooks <ben-linux@fluff.org>"); diff --git a/drivers/mmc/host/s3cmci.h b/drivers/mmc/host/s3cmci.h deleted file mode 100644 index 8b65d7ad9f97..000000000000 --- a/drivers/mmc/host/s3cmci.h +++ /dev/null @@ -1,75 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * linux/drivers/mmc/s3cmci.h - Samsung S3C MCI driver - * - * Copyright (C) 2004-2006 Thomas Kleffel, All Rights Reserved. - */ - -enum s3cmci_waitfor { - COMPLETION_NONE, - COMPLETION_FINALIZE, - COMPLETION_CMDSENT, - COMPLETION_RSPFIN, - COMPLETION_XFERFINISH, - COMPLETION_XFERFINISH_RSPFIN, -}; - -struct s3cmci_host { - struct platform_device *pdev; - struct s3c24xx_mci_pdata *pdata; - struct mmc_host *mmc; - struct resource *mem; - struct clk *clk; - void __iomem *base; - int irq; - int irq_cd; - struct dma_chan *dma; - - unsigned long clk_rate; - unsigned long clk_div; - unsigned long real_rate; - u8 prescaler; - - int is2440; - unsigned sdiimsk; - unsigned sdidata; - - bool irq_disabled; - bool irq_enabled; - bool irq_state; - int sdio_irqen; - - struct mmc_request *mrq; - int cmd_is_stop; - - spinlock_t complete_lock; - enum s3cmci_waitfor complete_what; - - int dma_complete; - - u32 pio_sgptr; - u32 pio_bytes; - u32 pio_count; - u32 *pio_ptr; -#define XFER_NONE 0 -#define XFER_READ 1 -#define XFER_WRITE 2 - u32 pio_active; - - int bus_width; - - char dbgmsg_cmd[301]; - char dbgmsg_dat[301]; - char *status; - - unsigned int ccnt, dcnt; - struct tasklet_struct pio_tasklet; - -#ifdef CONFIG_DEBUG_FS - struct dentry *debug_root; -#endif - -#ifdef CONFIG_ARM_S3C24XX_CPUFREQ - struct notifier_block freq_transition; -#endif -}; diff --git a/include/linux/platform_data/mmc-s3cmci.h b/include/linux/platform_data/mmc-s3cmci.h deleted file mode 100644 index bacb86db3112..000000000000 --- a/include/linux/platform_data/mmc-s3cmci.h +++ /dev/null @@ -1,51 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ARCH_MCI_H -#define _ARCH_MCI_H - -/** - * struct s3c24xx_mci_pdata - sd/mmc controller platform data - * @no_wprotect: Set this to indicate there is no write-protect switch. - * @no_detect: Set this if there is no detect switch. - * @wprotect_invert: Invert the default sense of the write protect switch. - * @use_dma: Set to allow the use of DMA. - * @gpio_detect: GPIO number for the card detect line. - * @gpio_wprotect: GPIO number for the write protect line. - * @ocr_avail: The mask of the available power states, non-zero to use. - * @set_power: Callback to control the power mode. - * - * The @gpio_detect is used for card detection when @no_wprotect is unset, - * and the default sense is that 0 returned from gpio_get_value() means - * that a card is inserted. If @detect_invert is set, then the value from - * gpio_get_value() is inverted, which makes 1 mean card inserted. - * - * The driver will use @gpio_wprotect to signal whether the card is write - * protected if @no_wprotect is not set. A 0 returned from gpio_get_value() - * means the card is read/write, and 1 means read-only. The @wprotect_invert - * will invert the value returned from gpio_get_value(). - * - * Card power is set by @ocr_availa, using MCC_VDD_ constants if it is set - * to a non-zero value, otherwise the default of 3.2-3.4V is used. - */ -struct s3c24xx_mci_pdata { - unsigned int no_wprotect:1; - unsigned int no_detect:1; - unsigned int wprotect_invert:1; - unsigned int use_dma:1; - - unsigned long ocr_avail; - void (*set_power)(unsigned char power_mode, - unsigned short vdd); - struct gpio_desc *bus[6]; -}; - -/** - * s3c24xx_mci_set_platdata - set platform data for mmc/sdi device - * @pdata: The platform data - * - * Copy the platform data supplied by @pdata so that this can be marked - * __initdata. - */ -extern void s3c24xx_mci_def_set_power(unsigned char power_mode, unsigned short vdd); -extern void s3c24xx_mci_set_platdata(struct s3c24xx_mci_pdata *pdata); - -#endif /* _ARCH_NCI_H */ |