diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/mmc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mmc/mmc.c | 6 | ||||
| -rw-r--r-- | drivers/mmc/mmc.h | 4 | ||||
| -rw-r--r-- | drivers/mmc/mmc_block.c | 24 | ||||
| -rw-r--r-- | drivers/mmc/mmc_sysfs.c | 35 | ||||
| -rw-r--r-- | drivers/mmc/sdhci.c | 23 | ||||
| -rw-r--r-- | drivers/mmc/tifm_sd.c | 933 |
8 files changed, 1028 insertions, 14 deletions
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index f540bd88dc5..ea41852ec8c 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -109,4 +109,20 @@ config MMC_IMX If unsure, say N. +config MMC_TIFM_SD + tristate "TI Flash Media MMC/SD Interface support (EXPERIMENTAL)" + depends on MMC && EXPERIMENTAL + select TIFM_CORE + help + Say Y here if you want to be able to access MMC/SD cards with + the Texas Instruments(R) Flash Media card reader, found in many + laptops. + This option 'selects' (turns on, enables) 'TIFM_CORE', but you + probably also need appropriate card reader host adapter, such as + 'Misc devices: TI Flash Media PCI74xx/PCI76xx host adapter support + (TIFM_7XX1)'. + + To compile this driver as a module, choose M here: the + module will be called tifm_sd. + endmenu diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile index b1f6e03e7aa..acfd4de0aba 100644 --- a/drivers/mmc/Makefile +++ b/drivers/mmc/Makefile @@ -23,6 +23,7 @@ obj-$(CONFIG_MMC_WBSD) += wbsd.o obj-$(CONFIG_MMC_AU1X) += au1xmmc.o obj-$(CONFIG_MMC_OMAP) += omap.o obj-$(CONFIG_MMC_AT91RM9200) += at91_mci.o +obj-$(CONFIG_MMC_TIFM_SD) += tifm_sd.o mmc_core-y := mmc.o mmc_sysfs.o mmc_core-$(CONFIG_BLOCK) += mmc_queue.o diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 5b9caa7978d..ee8863c123e 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1166,9 +1166,9 @@ static void mmc_setup(struct mmc_host *host) void mmc_detect_change(struct mmc_host *host, unsigned long delay) { if (delay) - schedule_delayed_work(&host->detect, delay); + mmc_schedule_delayed_work(&host->detect, delay); else - schedule_work(&host->detect); + mmc_schedule_work(&host->detect); } EXPORT_SYMBOL(mmc_detect_change); @@ -1311,7 +1311,7 @@ EXPORT_SYMBOL(mmc_remove_host); */ void mmc_free_host(struct mmc_host *host) { - flush_scheduled_work(); + mmc_flush_scheduled_work(); mmc_free_host_sysfs(host); } diff --git a/drivers/mmc/mmc.h b/drivers/mmc/mmc.h index 97bae00292f..cd5e0ab3d84 100644 --- a/drivers/mmc/mmc.h +++ b/drivers/mmc/mmc.h @@ -18,4 +18,8 @@ struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev); int mmc_add_host_sysfs(struct mmc_host *host); void mmc_remove_host_sysfs(struct mmc_host *host); void mmc_free_host_sysfs(struct mmc_host *host); + +int mmc_schedule_work(struct work_struct *work); +int mmc_schedule_delayed_work(struct work_struct *work, unsigned long delay); +void mmc_flush_scheduled_work(void); #endif diff --git a/drivers/mmc/mmc_block.c b/drivers/mmc/mmc_block.c index db0e8ad439a..c1293f1bda8 100644 --- a/drivers/mmc/mmc_block.c +++ b/drivers/mmc/mmc_block.c @@ -158,13 +158,13 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) { struct mmc_blk_data *md = mq->data; struct mmc_card *card = md->queue.card; + struct mmc_blk_request brq; int ret; if (mmc_card_claim_host(card)) goto cmd_err; do { - struct mmc_blk_request brq; struct mmc_command cmd; u32 readcmd, writecmd; @@ -278,17 +278,27 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) cmd_err: mmc_card_release_host(card); + ret = 1; + /* - * This is a little draconian, but until we get proper - * error handling sorted out here, its the best we can - * do - especially as some hosts have no idea how much - * data was transferred before the error occurred. + * For writes and where the host claims to support proper + * error reporting, we first ok the successful blocks. + * + * For reads we just fail the entire chunk as that should + * be safe in all cases. */ + if (rq_data_dir(req) != READ && + (card->host->caps & MMC_CAP_MULTIWRITE)) { + spin_lock_irq(&md->lock); + ret = end_that_request_chunk(req, 1, brq.data.bytes_xfered); + spin_unlock_irq(&md->lock); + } + spin_lock_irq(&md->lock); - do { + while (ret) { ret = end_that_request_chunk(req, 0, req->current_nr_sectors << 9); - } while (ret); + } add_disk_randomness(req->rq_disk); blkdev_dequeue_request(req); diff --git a/drivers/mmc/mmc_sysfs.c b/drivers/mmc/mmc_sysfs.c index a2a35fd946e..10cc9734eaa 100644 --- a/drivers/mmc/mmc_sysfs.c +++ b/drivers/mmc/mmc_sysfs.c @@ -13,6 +13,7 @@ #include <linux/init.h> #include <linux/device.h> #include <linux/idr.h> +#include <linux/workqueue.h> #include <linux/mmc/card.h> #include <linux/mmc/host.h> @@ -317,10 +318,41 @@ void mmc_free_host_sysfs(struct mmc_host *host) class_device_put(&host->class_dev); } +static struct workqueue_struct *workqueue; + +/* + * Internal function. Schedule work in the MMC work queue. + */ +int mmc_schedule_work(struct work_struct *work) +{ + return queue_work(workqueue, work); +} + +/* + * Internal function. Schedule delayed work in the MMC work queue. + */ +int mmc_schedule_delayed_work(struct work_struct *work, unsigned long delay) +{ + return queue_delayed_work(workqueue, work, delay); +} + +/* + * Internal function. Flush all scheduled work from the MMC work queue. + */ +void mmc_flush_scheduled_work(void) +{ + flush_workqueue(workqueue); +} static int __init mmc_init(void) { - int ret = bus_register(&mmc_bus_type); + int ret; + + workqueue = create_singlethread_workqueue("kmmcd"); + if (!workqueue) + return -ENOMEM; + + ret = bus_register(&mmc_bus_type); if (ret == 0) { ret = class_register(&mmc_host_class); if (ret) @@ -333,6 +365,7 @@ static void __exit mmc_exit(void) { class_unregister(&mmc_host_class); bus_unregister(&mmc_bus_type); + destroy_workqueue(workqueue); } module_init(mmc_init); diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c index 4dab5ec392e..20711acb012 100644 --- a/drivers/mmc/sdhci.c +++ b/drivers/mmc/sdhci.c @@ -35,6 +35,8 @@ static unsigned int debug_quirks = 0; #define SDHCI_QUIRK_CLOCK_BEFORE_RESET (1<<0) #define SDHCI_QUIRK_FORCE_DMA (1<<1) +/* Controller doesn't like some resets when there is no card inserted. */ +#define SDHCI_QUIRK_NO_CARD_NO_RESET (1<<2) static const struct pci_device_id pci_ids[] __devinitdata = { { @@ -51,7 +53,8 @@ static const struct pci_device_id pci_ids[] __devinitdata = { .device = PCI_DEVICE_ID_RICOH_R5C822, .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, - .driver_data = SDHCI_QUIRK_FORCE_DMA, + .driver_data = SDHCI_QUIRK_FORCE_DMA | + SDHCI_QUIRK_NO_CARD_NO_RESET, }, { @@ -125,6 +128,12 @@ static void sdhci_reset(struct sdhci_host *host, u8 mask) { unsigned long timeout; + if (host->chip->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) { + if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & + SDHCI_CARD_PRESENT)) + return; + } + writeb(mask, host->ioaddr + SDHCI_SOFTWARE_RESET); if (mask & SDHCI_RESET_ALL) @@ -717,6 +726,7 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq) } else sdhci_send_command(host, mrq->cmd); + mmiowb(); spin_unlock_irqrestore(&host->lock, flags); } @@ -753,6 +763,7 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) ctrl &= ~SDHCI_CTRL_4BITBUS; writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL); + mmiowb(); spin_unlock_irqrestore(&host->lock, flags); } @@ -860,6 +871,7 @@ static void sdhci_tasklet_finish(unsigned long param) sdhci_deactivate_led(host); + mmiowb(); spin_unlock_irqrestore(&host->lock, flags); mmc_request_done(host->mmc, mrq); @@ -893,6 +905,7 @@ static void sdhci_timeout_timer(unsigned long data) } } + mmiowb(); spin_unlock_irqrestore(&host->lock, flags); } @@ -1030,6 +1043,7 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id, struct pt_regs *regs) result = IRQ_HANDLED; + mmiowb(); out: spin_unlock(&host->lock); @@ -1095,6 +1109,7 @@ static int sdhci_resume (struct pci_dev *pdev) if (chip->hosts[i]->flags & SDHCI_USE_DMA) pci_set_master(pdev); sdhci_init(chip->hosts[i]); + mmiowb(); ret = mmc_resume_host(chip->hosts[i]->mmc); if (ret) return ret; @@ -1168,6 +1183,9 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot) host = mmc_priv(mmc); host->mmc = mmc; + host->chip = chip; + chip->hosts[slot] = host; + host->bar = first_bar + slot; host->addr = pci_resource_start(pdev, host->bar); @@ -1324,8 +1342,7 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot) sdhci_dumpregs(host); #endif - host->chip = chip; - chip->hosts[slot] = host; + mmiowb(); mmc_add_host(mmc); diff --git a/drivers/mmc/tifm_sd.c b/drivers/mmc/tifm_sd.c new file mode 100644 index 00000000000..6d23dc08d16 --- /dev/null +++ b/drivers/mmc/tifm_sd.c @@ -0,0 +1,933 @@ +/* + * tifm_sd.c - TI FlashMedia driver + * + * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + + +#include <linux/tifm.h> +#include <linux/mmc/protocol.h> +#include <linux/mmc/host.h> +#include <linux/highmem.h> + +#define DRIVER_NAME "tifm_sd" +#define DRIVER_VERSION "0.6" + +static int no_dma = 0; +static int fixed_timeout = 0; +module_param(no_dma, bool, 0644); +module_param(fixed_timeout, bool, 0644); + +/* Constants here are mostly from OMAP5912 datasheet */ +#define TIFM_MMCSD_RESET 0x0002 +#define TIFM_MMCSD_CLKMASK 0x03ff +#define TIFM_MMCSD_POWER 0x0800 +#define TIFM_MMCSD_4BBUS 0x8000 +#define TIFM_MMCSD_RXDE 0x8000 /* rx dma enable */ +#define TIFM_MMCSD_TXDE 0x0080 /* tx dma enable */ +#define TIFM_MMCSD_BUFINT 0x0c00 /* set bits: AE, AF */ +#define TIFM_MMCSD_DPE 0x0020 /* data timeout counted in kilocycles */ +#define TIFM_MMCSD_INAB 0x0080 /* abort / initialize command */ +#define TIFM_MMCSD_READ 0x8000 + +#define TIFM_MMCSD_DATAMASK 0x001d /* set bits: EOFB, BRS, CB, EOC */ +#define TIFM_MMCSD_ERRMASK 0x41e0 /* set bits: CERR, CCRC, CTO, DCRC, DTO */ +#define TIFM_MMCSD_EOC 0x0001 /* end of command phase */ +#define TIFM_MMCSD_CB 0x0004 /* card enter busy state */ +#define TIFM_MMCSD_BRS 0x0008 /* block received/sent */ +#define TIFM_MMCSD_EOFB 0x0010 /* card exit busy state */ +#define TIFM_MMCSD_DTO 0x0020 /* data time-out */ +#define TIFM_MMCSD_DCRC 0x0040 /* data crc error */ +#define TIFM_MMCSD_CTO 0x0080 /* command time-out */ +#define TIFM_MMCSD_CCRC 0x0100 /* command crc error */ +#define TIFM_MMCSD_AF 0x0400 /* fifo almost full */ +#define TIFM_MMCSD_AE 0x0800 /* fifo almost empty */ +#define TIFM_MMCSD_CERR 0x4000 /* card status error */ + +#define TIFM_MMCSD_FIFO_SIZE 0x0020 + +#define TIFM_MMCSD_RSP_R0 0x0000 +#define TIFM_MMCSD_RSP_R1 0x0100 +#define TIFM_MMCSD_RSP_R2 0x0200 +#define TIFM_MMCSD_RSP_R3 0x0300 +#define TIFM_MMCSD_RSP_R4 0x0400 +#define TIFM_MMCSD_RSP_R5 0x0500 +#define TIFM_MMCSD_RSP_R6 0x0600 + +#define TIFM_MMCSD_RSP_BUSY 0x0800 + +#define TIFM_MMCSD_CMD_BC 0x0000 +#define TIFM_MMCSD_CMD_BCR 0x1000 +#define TIFM_MMCSD_CMD_AC 0x2000 +#define TIFM_MMCSD_CMD_ADTC 0x3000 + +typedef enum { + IDLE = 0, + CMD, /* main command ended */ + BRS, /* block transfer finished */ + SCMD, /* stop command ended */ + CARD, /* card left busy state */ + FIFO, /* FIFO operation completed (uncertain) */ + READY +} card_state_t; + +enum { + FIFO_RDY = 0x0001, /* hardware dependent value */ + HOST_REG = 0x0002, + EJECT = 0x0004, + EJECT_DONE = 0x0008, + CARD_BUSY = 0x0010, + OPENDRAIN = 0x0040, /* hardware dependent value */ + CARD_EVENT = 0x0100, /* hardware dependent value */ + CARD_RO = 0x0200, /* hardware dependent value */ + FIFO_EVENT = 0x10000 }; /* hardware dependent value */ + +struct tifm_sd { + struct tifm_dev *dev; + + unsigned int flags; + card_state_t state; + unsigned int clk_freq; + unsigned int clk_div; + unsigned long timeout_jiffies; // software timeout - 2 sec + + struct mmc_request *req; + struct work_struct cmd_handler; + struct work_struct abort_handler; + wait_queue_head_t can_eject; + + size_t written_blocks; + char *buffer; + size_t buffer_size; + size_t buffer_pos; + +}; + +static int tifm_sd_transfer_data(struct tifm_dev *sock, struct tifm_sd *host, + unsigned int host_status) +{ + struct mmc_command *cmd = host->req->cmd; + unsigned int t_val = 0, cnt = 0; + + if (host_status & TIFM_MMCSD_BRS) { + /* in non-dma rx mode BRS fires when fifo is still not empty */ + if (host->buffer && (cmd->data->flags & MMC_DATA_READ)) { + while (host->buffer_size > host->buffer_pos) { + t_val = readl(sock->addr + SOCK_MMCSD_DATA); + host->buffer[host->buffer_pos++] = t_val & 0xff; + host->buffer[host->buffer_pos++] = + (t_val >> 8) & 0xff; + } + } + return 1; + } else if (host->buffer) { + if ((cmd->data->flags & MMC_DATA_READ) && + (host_status & TIFM_MMCSD_AF)) { + for (cnt = 0; cnt < TIFM_MMCSD_FIFO_SIZE; cnt++) { + t_val = readl(sock->addr + SOCK_MMCSD_DATA); + if (host->buffer_size > host->buffer_pos) { + host->buffer[host->buffer_pos++] = + t_val & 0xff; + host->buffer[host->buffer_pos++] = + (t_val >> 8) & 0xff; + } + } + } else if ((cmd->data->flags & MMC_DATA_WRITE) + && (host_status & TIFM_MMCSD_AE)) { + for (cnt = 0; cnt < TIFM_MMCSD_FIFO_SIZE; cnt++) { + if (host->buffer_size > host->buffer_pos) { + t_val = host->buffer[host->buffer_pos++] & 0x00ff; + t_val |= ((host->buffer[host->buffer_pos++]) << 8) + & 0xff00; + writel(t_val, + sock->addr + SOCK_MMCSD_DATA); + } + } + } + } + return 0; +} + +static unsigned int tifm_sd_op_flags(struct mmc_command *cmd) +{ + unsigned int rc = 0; + + switch (mmc_resp_type(cmd)) { + case MMC_RSP_NONE: + rc |= TIFM_MMCSD_RSP_R0; + break; + case MMC_RSP_R1B: + rc |= TIFM_MMCSD_RSP_BUSY; // deliberate fall-through + case MMC_RSP_R1: + rc |= TIFM_MMCSD_RSP_R1; + break; + case MMC_RSP_R2: + rc |= TIFM_MMCSD_RSP_R2; + break; + case MMC_RSP_R3: + rc |= TIFM_MMCSD_RSP_R3; + break; + case MMC_RSP_R6: + rc |= TIFM_MMCSD_RSP_R6; + break; + default: + BUG(); + } + + switch (mmc_cmd_type(cmd)) { + case MMC_CMD_BC: + rc |= TIFM_MMCSD_CMD_BC; + break; + case MMC_CMD_BCR: + rc |= TIFM_MMCSD_CMD_BCR; + break; + case MMC_CMD_AC: + rc |= TIFM_MMCSD_CMD_AC; + break; + case MMC_CMD_ADTC: + rc |= TIFM_MMCSD_CMD_ADTC; + break; + default: + BUG(); + } + return rc; +} + +static void tifm_sd_exec(struct tifm_sd *host, struct mmc_command *cmd) +{ + struct tifm_dev *sock = host->dev; + unsigned int cmd_mask = tifm_sd_op_flags(cmd) | + (host->flags & OPENDRAIN); + + if (cmd->data && (cmd->data->flags & MMC_DATA_READ)) + cmd_mask |= TIFM_MMCSD_READ; + + dev_dbg(&sock->dev, "executing opcode 0x%x, arg: 0x%x, mask: 0x%x\n", + cmd->opcode, cmd->arg, cmd_mask); + + writel((cmd->arg >> 16) & 0xffff, sock->addr + SOCK_MMCSD_ARG_HIGH); + writel(cmd->arg & 0xffff, sock->addr + SOCK_MMCSD_ARG_LOW); + writel(cmd->opcode | cmd_mask, sock->addr + SOCK_MMCSD_COMMAND); +} + +static void tifm_sd_fetch_resp(struct mmc_command *cmd, struct tifm_dev *sock) +{ + cmd->resp[0] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x1c) << 16) + | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x18); + cmd->resp[1] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x14) << 16) + | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x10); + cmd->resp[2] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x0c) << 16) + | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x08); + cmd->resp[3] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x04) << 16) + | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x00); +} + +static void tifm_sd_process_cmd(struct tifm_dev *sock, struct tifm_sd *host, + unsigned int host_status) +{ + struct mmc_command *cmd = host->req->cmd; + +change_state: + switch (host->state) { + case IDLE: + return; + case CMD: + if (host_status & TIFM_MMCSD_EOC) { + tifm_sd_fetch_resp(cmd, sock); + if (cmd->data) { + host->state = BRS; + } else + host->state = READY; + goto change_state; + } + break; + case BRS: + if (tifm_sd_transfer_data(sock, host, host_status)) { + if (!host->req->stop) { + if (cmd->data->flags & MMC_DATA_WRITE) { + host->state = CARD; + } else { + host->state = + host->buffer ? READY : FIFO; + } + goto change_state; + } + tifm_sd_exec(host, host->req->stop); + host->state = SCMD; + } + break; + case SCMD: + if (host_status & TIFM_MMCSD_EOC) { + tifm_sd_fetch_resp(host->req->stop, sock); + if (cmd->error) { + host->state = READY; + } else if (cmd->data->flags & MMC_DATA_WRITE) { + host->state = CARD; + } else { + host->state = host->buffer ? READY : FIFO; + } + goto change_state; + } + break; + case CARD: + if (!(host->flags & CARD_BUSY) + && (host->written_blocks == cmd->data->blocks)) { + host->state = host->buffer ? READY : FIFO; + goto change_state; + } + break; + case FIFO: + if (host->flags & FIFO_RDY) { + host->state = READY; + host->flags &= ~FIFO_RDY; + goto change_state; + } + break; + case READY: + queue_work(sock->wq, &host->cmd_handler); + return; + } + + queue_delayed_work(sock->wq, &host->abort_handler, + host->timeout_jiffies); +} + +/* Called from interrupt handler */ +static unsigned int tifm_sd_signal_irq(struct tifm_dev *sock, + unsigned int sock_irq_status) +{ + struct tifm_sd *host; + unsigned int host_status = 0, fifo_status = 0; + int error_code = 0; + + spin_lock(&sock->lock); + host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock)); + cancel_delayed_work(&host->abort_handler); + + if (sock_irq_status & FIFO_EVENT) { + fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS); + writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS); + + host->flags |= fifo_status & FIFO_RDY; + } + + if (sock_irq_status & CARD_EVENT) { + host_status = readl(sock->addr + SOCK_MMCSD_STATUS); + writel(host_status, sock->addr + SOCK_MMCSD_STATUS); + + if (!(host->flags & HOST_REG)) + queue_work(sock->wq, &host->cmd_handler); + if (!host->req) + goto done; + + if (host_status & TIFM_MMCSD_ERRMASK) { + if (host_status & TIFM_MMCSD_CERR) + error_code = MMC_ERR_FAILED; + else if (host_status & + (TIFM_MMCSD_CTO | TIFM_MMCSD_DTO)) + error_code = MMC_ERR_TIMEOUT; + else if (host_status & + (TIFM_MMCSD_CCRC | TIFM_MMCSD_DCRC)) + error_code = MMC_ERR_BADCRC; + + writel(TIFM_FIFO_INT_SETALL, + sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); + writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL); + + if (host->req->stop) { + if (host->state == SCMD) { + host->req->stop->error = error_code; + } else if(host->state == BRS) { + host->req->cmd->error = error_code; + tifm_sd_exec(host, host->req->stop); + queue_delayed_work(sock->wq, + &host->abort_handler, + host->timeout_jiffies); + host->state = SCMD; + goto done; + } else { + host->req->cmd->error = error_code; + } + } else { + host->req->cmd->error = error_code; + } + host->state = READY; + } + + if (host_status & TIFM_MMCSD_CB) + host->flags |= CARD_BUSY; + if ((host_status & TIFM_MMCSD_EOFB) && + (host->flags & CARD_BUSY)) { + host->written_blocks++; + host->flags &= ~CARD_BUSY; + } + } + + if (host->req) + tifm_sd_process_cmd(sock, host, host_status); +done: + dev_dbg(&sock->dev, "host_status %x, fifo_status %x\n", + host_status, fifo_status); + spin_unlock(&sock->lock); + return sock_irq_status; +} + +static void tifm_sd_prepare_data(struct tifm_sd *card, struct mmc_command *cmd) +{ + struct tifm_dev *sock = card->dev; + unsigned int dest_cnt; + + /* DMA style IO */ + + writel(TIFM_FIFO_INT_SETALL, + sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); + writel(long_log2(cmd->data->blksz) - 2, + sock->addr + SOCK_FIFO_PAGE_SIZE); + writel(TIFM_FIFO_ENABLE, sock->addr + SOCK_FIFO_CONTROL); + writel(TIFM_FIFO_INTMASK, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); + + dest_cnt = (cmd->data->blocks) << 8; + + writel(sg_dma_address(cmd->data->sg), sock->addr + SOCK_DMA_ADDRESS); + + writel(cmd->data->blocks - 1, sock->addr + SOCK_MMCSD_NUM_BLOCKS); + writel(cmd->data->blksz - 1, sock->addr + SOCK_MMCSD_BLOCK_LEN); + + if (cmd->data->flags & MMC_DATA_WRITE) { + writel(TIFM_MMCSD_TXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); + writel(dest_cnt | TIFM_DMA_TX | TIFM_DMA_EN, + sock->addr + SOCK_DMA_CONTROL); + } else { + writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); + writel(dest_cnt | TIFM_DMA_EN, sock->addr + SOCK_DMA_CONTROL); + } +} + +static void tifm_sd_set_data_timeout(struct tifm_sd *host, + struct mmc_data *data) +{ + struct tifm_dev *sock = host->dev; + unsigned int data_timeout = data->timeout_clks; + + if (fixed_timeout) + return; + + data_timeout += data->timeout_ns / + ((1000000000 / host->clk_freq) * host->clk_div); + data_timeout *= 10; // call it fudge factor for now + + if (data_timeout < 0xffff) { + writel((~TIFM_MMCSD_DPE) & + readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), + sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); + writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO); + } else { + writel(TIFM_MMCSD_DPE | + readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), + sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); + data_timeout = (data_timeout >> 10) + 1; + if(data_timeout > 0xffff) + data_timeout = 0; /* set to unlimited */ + writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO); + } +} + +static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq) +{ + struct tifm_sd *host = mmc_priv(mmc); + struct tifm_dev *sock = host->dev; + unsigned long flags; + int sg_count = 0; + struct mmc_data *r_data = mrq->cmd->data; + + spin_lock_irqsave(&sock->lock, flags); + if (host->flags & EJECT) { + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } + + if (host->req) { + printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n"); + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } + + if (r_data) { + tifm_sd_set_data_timeout(host, r_data); + + sg_count = tifm_map_sg(sock, r_data->sg, r_data->sg_len, + mrq->cmd->flags & MMC_DATA_WRITE + ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); + if (sg_count != 1) { + printk(KERN_ERR DRIVER_NAME + ": scatterlist map failed\n"); + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } + + host->written_blocks = 0; + host->flags &= ~CARD_BUSY; + tifm_sd_prepare_data(host, mrq->cmd); + } + + host->req = mrq; + host->state = CMD; + queue_delayed_work(sock->wq, &host->abort_handler, + host->timeout_jiffies); + writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + tifm_sd_exec(host, mrq->cmd); + spin_unlock_irqrestore(&sock->lock, flags); + return; + +err_out: + if (sg_count > 0) + tifm_unmap_sg(sock, r_data->sg, r_data->sg_len, + (r_data->flags & MMC_DATA_WRITE) + ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); + + mrq->cmd->error = MMC_ERR_TIMEOUT; + mmc_request_done(mmc, mrq); +} + +static void tifm_sd_end_cmd(void *data) +{ + struct tifm_sd *host = data; + struct tifm_dev *sock = host->dev; + struct mmc_host *mmc = tifm_get_drvdata(sock); + struct mmc_request *mrq; + struct mmc_data *r_data = 0; + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + + mrq = host->req; + host->req = 0; + host->state = IDLE; + + if (!mrq) { + printk(KERN_ERR DRIVER_NAME ": no request to complete?\n"); + spin_unlock_irqrestore(&sock->lock, flags); + return; + } + + r_data = mrq->cmd->data; + if (r_data) { + if (r_data->flags & MMC_DATA_WRITE) { + r_data->bytes_xfered = host->written_blocks * + r_data->blksz; + } else { + r_data->bytes_xfered = r_data->blocks - + readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1; + r_data->bytes_xfered *= r_data->blksz; + r_data->bytes_xfered += r_data->blksz - + readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1; + } + tifm_unmap_sg(sock, r_data->sg, r_data->sg_len, + (r_data->flags & MMC_DATA_WRITE) + ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); + } + + writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + + spin_unlock_irqrestore(&sock->lock, flags); + mmc_request_done(mmc, mrq); +} + +static void tifm_sd_request_nodma(struct mmc_host *mmc, struct mmc_request *mrq) +{ + struct tifm_sd *host = mmc_priv(mmc); + struct tifm_dev *sock = host->dev; + unsigned long flags; + struct mmc_data *r_data = mrq->cmd->data; + char *t_buffer = 0; + + if (r_data) { + t_buffer = kmap(r_data->sg->page); + if (!t_buffer) { + printk(KERN_ERR DRIVER_NAME ": kmap failed\n"); + goto err_out; + } + } + + spin_lock_irqsave(&sock->lock, flags); + if (host->flags & EJECT) { + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } + + if (host->req) { + printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n"); + spin_unlock_irqrestore(&sock->lock, flags); + goto err_out; + } + + if (r_data) { + tifm_sd_set_data_timeout(host, r_data); + + host->buffer = t_buffer + r_data->sg->offset; + host->buffer_size = mrq->cmd->data->blocks * + mrq->cmd->data->blksz; + + writel(TIFM_MMCSD_BUFINT | + readl(sock->addr + SOCK_MMCSD_INT_ENABLE), + sock->addr + SOCK_MMCSD_INT_ENABLE); + writel(((TIFM_MMCSD_FIFO_SIZE - 1) << 8) | + (TIFM_MMCSD_FIFO_SIZE - 1), + sock->addr + SOCK_MMCSD_BUFFER_CONFIG); + + host->written_blocks = 0; + host->flags &= ~CARD_BUSY; + host->buffer_pos = 0; + writel(r_data->blocks - 1, sock->addr + SOCK_MMCSD_NUM_BLOCKS); + writel(r_data->blksz - 1, sock->addr + SOCK_MMCSD_BLOCK_LEN); + } + + host->req = mrq; + host->state = CMD; + queue_delayed_work(sock->wq, &host->abort_handler, + host->timeout_jiffies); + writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + tifm_sd_exec(host, mrq->cmd); + spin_unlock_irqrestore(&sock->lock, flags); + return; + +err_out: + if (t_buffer) + kunmap(r_data->sg->page); + + mrq->cmd->error = MMC_ERR_TIMEOUT; + mmc_request_done(mmc, mrq); +} + +static void tifm_sd_end_cmd_nodma(void *data) +{ + struct tifm_sd *host = (struct tifm_sd*)data; + struct tifm_dev *sock = host->dev; + struct mmc_host *mmc = tifm_get_drvdata(sock); + struct mmc_request *mrq; + struct mmc_data *r_data = 0; + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + + mrq = host->req; + host->req = 0; + host->state = IDLE; + + if (!mrq) { + printk(KERN_ERR DRIVER_NAME ": no request to complete?\n"); + spin_unlock_irqrestore(&sock->lock, flags); + return; + } + + r_data = mrq->cmd->data; + if (r_data) { + writel((~TIFM_MMCSD_BUFINT) & + readl(sock->addr + SOCK_MMCSD_INT_ENABLE), + sock->addr + SOCK_MMCSD_INT_ENABLE); + + if (r_data->flags & MMC_DATA_WRITE) { + r_data->bytes_xfered = host->written_blocks * + r_data->blksz; + } else { + r_data->bytes_xfered = r_data->blocks - + readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1; + r_data->bytes_xfered *= r_data->blksz; + r_data->bytes_xfered += r_data->blksz - + readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1; + } + host->buffer = 0; + host->buffer_pos = 0; + host->buffer_size = 0; + } + + writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + + spin_unlock_irqrestore(&sock->lock, flags); + + if (r_data) + kunmap(r_data->sg->page); + + mmc_request_done(mmc, mrq); +} + +static void tifm_sd_abort(void *data) +{ + printk(KERN_ERR DRIVER_NAME + ": card failed to respond for a long period of time"); + tifm_eject(((struct tifm_sd*)data)->dev); +} + +static void tifm_sd_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct tifm_sd *host = mmc_priv(mmc); + struct tifm_dev *sock = host->dev; + unsigned int clk_div1, clk_div2; + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + + dev_dbg(&sock->dev, "Setting bus width %d, power %d\n", ios->bus_width, + ios->power_mode); + if (ios->bus_width == MMC_BUS_WIDTH_4) { + writel(TIFM_MMCSD_4BBUS | readl(sock->addr + SOCK_MMCSD_CONFIG), + sock->addr + SOCK_MMCSD_CONFIG); + } else { + writel((~TIFM_MMCSD_4BBUS) & + readl(sock->addr + SOCK_MMCSD_CONFIG), + sock->addr + SOCK_MMCSD_CONFIG); + } + + if (ios->clock) { + clk_div1 = 20000000 / ios->clock; + if (!clk_div1) + clk_div1 = 1; + + clk_div2 = 24000000 / ios->clock; + if (!clk_div2) + clk_div2 = 1; + + if ((20000000 / clk_div1) > ios->clock) + clk_div1++; + if ((24000000 / clk_div2) > ios->clock) + clk_div2++; + if ((20000000 / clk_div1) > (24000000 / clk_div2)) { + host->clk_freq = 20000000; + host->clk_div = clk_div1; + writel((~TIFM_CTRL_FAST_CLK) & + readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + } else { + host->clk_freq = 24000000; + host->clk_div = clk_div2; + writel(TIFM_CTRL_FAST_CLK | + readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + } + } else { + host->clk_div = 0; + } + host->clk_div &= TIFM_MMCSD_CLKMASK; + writel(host->clk_div | ((~TIFM_MMCSD_CLKMASK) & + readl(sock->addr + SOCK_MMCSD_CONFIG)), + sock->addr + SOCK_MMCSD_CONFIG); + + if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) + host->flags |= OPENDRAIN; + else + host->flags &= ~OPENDRAIN; + + /* chip_select : maybe later */ + //vdd + //power is set before probe / after remove + //I believe, power_off when already marked for eject is sufficient to + // allow removal. + if ((host->flags & EJECT) && ios->power_mode == MMC_POWER_OFF) { + host->flags |= EJECT_DONE; + wake_up_all(&host->can_eject); + } + + spin_unlock_irqrestore(&sock->lock, flags); +} + +static int tifm_sd_ro(struct mmc_host *mmc) +{ + int rc; + struct tifm_sd *host = mmc_priv(mmc); + struct tifm_dev *sock = host->dev; + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + + host->flags |= (CARD_RO & readl(sock->addr + SOCK_PRESENT_STATE)); + rc = (host->flags & CARD_RO) ? 1 : 0; + + spin_unlock_irqrestore(&sock->lock, flags); + return rc; +} + +static struct mmc_host_ops tifm_sd_ops = { + .request = tifm_sd_request, + .set_ios = tifm_sd_ios, + .get_ro = tifm_sd_ro +}; + +static void tifm_sd_register_host(void *data) +{ + struct tifm_sd *host = (struct tifm_sd*)data; + struct tifm_dev *sock = host->dev; + struct mmc_host *mmc = tifm_get_drvdata(sock); + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + host->flags |= HOST_REG; + PREPARE_WORK(&host->cmd_handler, + no_dma ? tifm_sd_end_cmd_nodma : tifm_sd_end_cmd, + data); + spin_unlock_irqrestore(&sock->lock, flags); + dev_dbg(&sock->dev, "adding host\n"); + mmc_add_host(mmc); +} + +static int tifm_sd_probe(struct tifm_dev *sock) +{ + struct mmc_host *mmc; + struct tifm_sd *host; + int rc = -EIO; + + if (!(TIFM_SOCK_STATE_OCCUPIED & + readl(sock->addr + SOCK_PRESENT_STATE))) { + printk(KERN_WARNING DRIVER_NAME ": card gone, unexpectedly\n"); + return rc; + } + + mmc = mmc_alloc_host(sizeof(struct tifm_sd), &sock->dev); + if (!mmc) + return -ENOMEM; + + host = mmc_priv(mmc); + host->dev = sock; + host->clk_div = 61; + init_waitqueue_head(&host->can_eject); + INIT_WORK(&host->cmd_handler, tifm_sd_register_host, host); + INIT_WORK(&host->abort_handler, tifm_sd_abort, host); + + tifm_set_drvdata(sock, mmc); + sock->signal_irq = tifm_sd_signal_irq; + + host->clk_freq = 20000000; + host->timeout_jiffies = msecs_to_jiffies(1000); + + tifm_sd_ops.request = no_dma ? tifm_sd_request_nodma : tifm_sd_request; + mmc->ops = &tifm_sd_ops; + mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; + mmc->caps = MMC_CAP_4_BIT_DATA; + mmc->f_min = 20000000 / 60; + mmc->f_max = 24000000; + mmc->max_hw_segs = 1; + mmc->max_phys_segs = 1; + mmc->max_sectors = 127; + mmc->max_seg_size = mmc->max_sectors << 11; //2k maximum hw block length + + writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); + writel(TIFM_MMCSD_RESET, sock->addr + SOCK_MMCSD_SYSTEM_CONTROL); + writel(host->clk_div | TIFM_MMCSD_POWER, + sock->addr + SOCK_MMCSD_CONFIG); + + for (rc = 0; rc < 50; rc++) { + /* Wait for reset ack */ + if (1 & readl(sock->addr + SOCK_MMCSD_SYSTEM_STATUS)) { + rc = 0; + break; + } + msleep(10); + } + + if (rc) { + printk(KERN_ERR DRIVER_NAME + ": card not ready - probe failed\n"); + mmc_free_host(mmc); + return -ENODEV; + } + + writel(0, sock->addr + SOCK_MMCSD_NUM_BLOCKS); + writel(host->clk_div | TIFM_MMCSD_POWER, + sock->addr + SOCK_MMCSD_CONFIG); + writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); + writel(TIFM_MMCSD_DATAMASK | TIFM_MMCSD_ERRMASK, + sock->addr + SOCK_MMCSD_INT_ENABLE); + + writel(64, sock->addr + SOCK_MMCSD_COMMAND_TO); // command timeout 64 clocks for now + writel(TIFM_MMCSD_INAB, sock->addr + SOCK_MMCSD_COMMAND); + writel(host->clk_div | TIFM_MMCSD_POWER, + sock->addr + SOCK_MMCSD_CONFIG); + + queue_delayed_work(sock->wq, &host->abort_handler, + host->timeout_jiffies); + + return 0; +} + +static int tifm_sd_host_is_down(struct tifm_dev *sock) +{ + struct mmc_host *mmc = tifm_get_drvdata(sock); + struct tifm_sd *host = mmc_priv(mmc); + unsigned long flags; + int rc = 0; + + spin_lock_irqsave(&sock->lock, flags); + rc = (host->flags & EJECT_DONE); + spin_unlock_irqrestore(&sock->lock, flags); + return rc; +} + +static void tifm_sd_remove(struct tifm_dev *sock) +{ + struct mmc_host *mmc = tifm_get_drvdata(sock); + struct tifm_sd *host = mmc_priv(mmc); + unsigned long flags; + + spin_lock_irqsave(&sock->lock, flags); + host->flags |= EJECT; + if (host->req) + queue_work(sock->wq, &host->cmd_handler); + spin_unlock_irqrestore(&sock->lock, flags); + wait_event_timeout(host->can_eject, tifm_sd_host_is_down(sock), + host->timeout_jiffies); + + if (host->flags & HOST_REG) + mmc_remove_host(mmc); + + /* The meaning of the bit majority in this constant is unknown. */ + writel(0xfff8 & readl(sock->addr + SOCK_CONTROL), + sock->addr + SOCK_CONTROL); + writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); + writel(TIFM_FIFO_INT_SETALL, + sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); + writel(0, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); + + tifm_set_drvdata(sock, 0); + mmc_free_host(mmc); +} + +static tifm_media_id tifm_sd_id_tbl[] = { + FM_SD, 0 +}; + +static struct tifm_driver tifm_sd_driver = { + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE + }, + .id_table = tifm_sd_id_tbl, + .probe = tifm_sd_probe, + .remove = tifm_sd_remove +}; + +static int __init tifm_sd_init(void) +{ + return tifm_register_driver(&tifm_sd_driver); +} + +static void __exit tifm_sd_exit(void) +{ + tifm_unregister_driver(&tifm_sd_driver); +} + +MODULE_AUTHOR("Alex Dubov"); +MODULE_DESCRIPTION("TI FlashMedia SD driver"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(tifm, tifm_sd_id_tbl); +MODULE_VERSION(DRIVER_VERSION); + +module_init(tifm_sd_init); +module_exit(tifm_sd_exit); |