diff options
Diffstat (limited to 'drivers/mmc/tifm_sd.c')
| -rw-r--r-- | drivers/mmc/tifm_sd.c | 987 |
1 files changed, 0 insertions, 987 deletions
diff --git a/drivers/mmc/tifm_sd.c b/drivers/mmc/tifm_sd.c deleted file mode 100644 index 0581d09c58f..00000000000 --- a/drivers/mmc/tifm_sd.c +++ /dev/null @@ -1,987 +0,0 @@ -/* - * 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> -#include <asm/io.h> - -#define DRIVER_NAME "tifm_sd" -#define DRIVER_VERSION "0.7" - -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 0x401d /* set bits: CERR, EOFB, BRS, CB, EOC */ -#define TIFM_MMCSD_ERRMASK 0x01e0 /* set bits: 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 */ - 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; - - struct tasklet_struct finish_tasklet; - struct timer_list timer; - struct mmc_request *req; - wait_queue_head_t notify; - - size_t written_blocks; - size_t buffer_size; - size_t buffer_pos; - -}; - -static char* tifm_sd_data_buffer(struct mmc_data *data) -{ - return page_address(data->sg->page) + data->sg->offset; -} - -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; - char *buffer; - - if (host_status & TIFM_MMCSD_BRS) { - /* in non-dma rx mode BRS fires when fifo is still not empty */ - if (no_dma && (cmd->data->flags & MMC_DATA_READ)) { - buffer = tifm_sd_data_buffer(host->req->data); - while (host->buffer_size > host->buffer_pos) { - t_val = readl(sock->addr + SOCK_MMCSD_DATA); - buffer[host->buffer_pos++] = t_val & 0xff; - buffer[host->buffer_pos++] = - (t_val >> 8) & 0xff; - } - } - return 1; - } else if (no_dma) { - buffer = tifm_sd_data_buffer(host->req->data); - 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) { - buffer[host->buffer_pos++] = - t_val & 0xff; - 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 = buffer[host->buffer_pos++] - & 0x00ff; - t_val |= ((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; - 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_MMCSD_CERR)) { - 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 (cmd->data->flags & MMC_DATA_WRITE) { - host->state = CARD; - } else { - if (no_dma) { - if (host->req->stop) { - tifm_sd_exec(host, host->req->stop); - host->state = SCMD; - } else { - host->state = READY; - } - } else { - host->state = FIFO; - } - } - goto change_state; - } - break; - case SCMD: - if (host_status & TIFM_MMCSD_EOC) { - tifm_sd_fetch_resp(host->req->stop, sock); - host->state = READY; - goto change_state; - } - break; - case CARD: - dev_dbg(&sock->dev, "waiting for CARD, have %zd blocks\n", - host->written_blocks); - if (!(host->flags & CARD_BUSY) - && (host->written_blocks == cmd->data->blocks)) { - if (no_dma) { - if (host->req->stop) { - tifm_sd_exec(host, host->req->stop); - host->state = SCMD; - } else { - host->state = READY; - } - } else { - host->state = FIFO; - } - goto change_state; - } - break; - case FIFO: - if (host->flags & FIFO_RDY) { - host->flags &= ~FIFO_RDY; - if (host->req->stop) { - tifm_sd_exec(host, host->req->stop); - host->state = SCMD; - } else { - host->state = READY; - } - goto change_state; - } - break; - case READY: - tasklet_schedule(&host->finish_tasklet); - return; - } - -} - -/* Called from interrupt handler */ -static void 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)); - - 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->req) - goto done; - - if (host_status & TIFM_MMCSD_ERRMASK) { - 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->state == CARD - || host->state == FIFO) { - host->req->cmd->error = error_code; - tifm_sd_exec(host, host->req->stop); - 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); -} - -static void tifm_sd_prepare_data(struct tifm_sd *host, struct mmc_command *cmd) -{ - struct tifm_dev *sock = host->dev; - unsigned int dest_cnt; - - /* DMA style IO */ - dev_dbg(&sock->dev, "setting dma for %d blocks\n", - cmd->data->blocks); - writel(TIFM_FIFO_INT_SETALL, - sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); - writel(ilog2(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 / - ((1000000000UL / host->clk_freq) * host->clk_div); - - if (data_timeout < 0xffff) { - writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO); - writel((~TIFM_MMCSD_DPE) - & readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), - sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); - } else { - 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); - writel(TIFM_MMCSD_DPE - | readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), - sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); - } -} - -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; - mod_timer(&host->timer, jiffies + host->timeout_jiffies); - host->state = CMD; - 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(unsigned long 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 = NULL; - unsigned long flags; - - spin_lock_irqsave(&sock->lock, flags); - - del_timer(&host->timer); - mrq = host->req; - host->req = NULL; - 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; - - 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_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; - mod_timer(&host->timer, jiffies + host->timeout_jiffies); - host->state = CMD; - 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: - mrq->cmd->error = MMC_ERR_TIMEOUT; - mmc_request_done(mmc, mrq); -} - -static void tifm_sd_end_cmd_nodma(unsigned long 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 = NULL; - unsigned long flags; - - spin_lock_irqsave(&sock->lock, flags); - - del_timer(&host->timer); - mrq = host->req; - host->req = NULL; - 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_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); - - mmc_request_done(mmc, mrq); -} - -static void tifm_sd_terminate(struct tifm_sd *host) -{ - struct tifm_dev *sock = host->dev; - unsigned long flags; - - writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); - mmiowb(); - spin_lock_irqsave(&sock->lock, flags); - host->flags |= EJECT; - if (host->req) { - writel(TIFM_FIFO_INT_SETALL, - sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); - writel(0, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); - tasklet_schedule(&host->finish_tasklet); - } - spin_unlock_irqrestore(&sock->lock, flags); -} - -static void tifm_sd_abort(unsigned long data) -{ - struct tifm_sd *host = (struct tifm_sd*)data; - - printk(KERN_ERR DRIVER_NAME - ": card failed to respond for a long period of time"); - - tifm_sd_terminate(host); - tifm_eject(host->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->notify); - } - - 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 int tifm_sd_initialize_host(struct tifm_sd *host) -{ - int rc; - unsigned int host_status = 0; - struct tifm_dev *sock = host->dev; - - writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); - mmiowb(); - host->clk_div = 61; - host->clk_freq = 20000000; - writel(TIFM_MMCSD_RESET, sock->addr + SOCK_MMCSD_SYSTEM_CONTROL); - writel(host->clk_div | TIFM_MMCSD_POWER, - sock->addr + SOCK_MMCSD_CONFIG); - - /* wait up to 0.51 sec for reset */ - for (rc = 2; rc <= 256; rc <<= 1) { - if (1 & readl(sock->addr + SOCK_MMCSD_SYSTEM_STATUS)) { - rc = 0; - break; - } - msleep(rc); - } - - if (rc) { - printk(KERN_ERR DRIVER_NAME - ": controller failed to reset\n"); - 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); - - // command timeout fixed to 64 clocks for now - writel(64, sock->addr + SOCK_MMCSD_COMMAND_TO); - writel(TIFM_MMCSD_INAB, sock->addr + SOCK_MMCSD_COMMAND); - - /* INAB should take much less than reset */ - for (rc = 1; rc <= 16; rc <<= 1) { - host_status = readl(sock->addr + SOCK_MMCSD_STATUS); - writel(host_status, sock->addr + SOCK_MMCSD_STATUS); - if (!(host_status & TIFM_MMCSD_ERRMASK) - && (host_status & TIFM_MMCSD_EOC)) { - rc = 0; - break; - } - msleep(rc); - } - - if (rc) { - printk(KERN_ERR DRIVER_NAME - ": card not ready - probe failed on initialization\n"); - return -ENODEV; - } - - writel(TIFM_MMCSD_DATAMASK | TIFM_MMCSD_ERRMASK, - sock->addr + SOCK_MMCSD_INT_ENABLE); - mmiowb(); - - return 0; -} - -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); - tifm_set_drvdata(sock, mmc); - host->dev = sock; - host->timeout_jiffies = msecs_to_jiffies(1000); - - init_waitqueue_head(&host->notify); - tasklet_init(&host->finish_tasklet, - no_dma ? tifm_sd_end_cmd_nodma : tifm_sd_end_cmd, - (unsigned long)host); - setup_timer(&host->timer, tifm_sd_abort, (unsigned long)host); - - 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_CAP_MULTIWRITE; - mmc->f_min = 20000000 / 60; - mmc->f_max = 24000000; - mmc->max_hw_segs = 1; - mmc->max_phys_segs = 1; - // limited by DMA counter - it's safer to stick with - // block counter has 11 bits though - mmc->max_blk_count = 256; - // 2k maximum hw block length - mmc->max_blk_size = 2048; - mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; - mmc->max_seg_size = mmc->max_req_size; - sock->signal_irq = tifm_sd_signal_irq; - rc = tifm_sd_initialize_host(host); - - if (!rc) - rc = mmc_add_host(mmc); - if (rc) - goto out_free_mmc; - - return 0; -out_free_mmc: - mmc_free_host(mmc); - 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); - - del_timer_sync(&host->timer); - tifm_sd_terminate(host); - wait_event_timeout(host->notify, host->flags & EJECT_DONE, - host->timeout_jiffies); - tasklet_kill(&host->finish_tasklet); - 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); - - tifm_set_drvdata(sock, NULL); - mmc_free_host(mmc); -} - -#ifdef CONFIG_PM - -static int tifm_sd_suspend(struct tifm_dev *sock, pm_message_t state) -{ - struct mmc_host *mmc = tifm_get_drvdata(sock); - int rc; - - rc = mmc_suspend_host(mmc, state); - /* The meaning of the bit majority in this constant is unknown. */ - writel(0xfff8 & readl(sock->addr + SOCK_CONTROL), - sock->addr + SOCK_CONTROL); - return rc; -} - -static int tifm_sd_resume(struct tifm_dev *sock) -{ - struct mmc_host *mmc = tifm_get_drvdata(sock); - struct tifm_sd *host = mmc_priv(mmc); - - if (sock->media_id != FM_SD - || tifm_sd_initialize_host(host)) { - tifm_eject(sock); - return 0; - } else { - return mmc_resume_host(mmc); - } -} - -#else - -#define tifm_sd_suspend NULL -#define tifm_sd_resume NULL - -#endif /* CONFIG_PM */ - -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, - .suspend = tifm_sd_suspend, - .resume = tifm_sd_resume -}; - -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); |