enum {
FIFO_RDY = 0x0001, /* hardware dependent value */
- HOST_REG = 0x0002,
EJECT = 0x0004,
EJECT_DONE = 0x0008,
CARD_BUSY = 0x0010,
unsigned int clk_div;
unsigned long timeout_jiffies;
+ struct tasklet_struct finish_tasklet;
struct timer_list timer;
struct mmc_request *req;
- struct work_struct cmd_handler;
- wait_queue_head_t can_eject;
+ wait_queue_head_t notify;
size_t written_blocks;
size_t buffer_size;
}
break;
case READY:
- queue_work(sock->wq, &host->cmd_handler);
+ tasklet_schedule(&host->finish_tasklet);
return;
}
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;
mmc_request_done(mmc, mrq);
}
-static void tifm_sd_end_cmd(struct work_struct *work)
+static void tifm_sd_end_cmd(unsigned long data)
{
- struct tifm_sd *host = container_of(work, struct tifm_sd, cmd_handler);
+ 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;
mmc_request_done(mmc, mrq);
}
-static void tifm_sd_end_cmd_nodma(struct work_struct *work)
+static void tifm_sd_end_cmd_nodma(unsigned long data)
{
- struct tifm_sd *host = container_of(work, struct tifm_sd, cmd_handler);
+ 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;
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_eject(((struct tifm_sd*)data)->dev);
+
+ tifm_sd_terminate(host);
+ tifm_eject(host->dev);
}
static void tifm_sd_ios(struct mmc_host *mmc, struct mmc_ios *ios)
// allow removal.
if ((host->flags & EJECT) && ios->power_mode == MMC_POWER_OFF) {
host->flags |= EJECT_DONE;
- wake_up_all(&host->can_eject);
+ wake_up_all(&host->notify);
}
spin_unlock_irqrestore(&sock->lock, flags);
.get_ro = tifm_sd_ro
};
-static void tifm_sd_register_host(struct work_struct *work)
+static int tifm_sd_initialize_host(struct tifm_sd *host)
{
- struct tifm_sd *host = container_of(work, struct tifm_sd, cmd_handler);
+ int rc;
+ unsigned int host_status = 0;
struct tifm_dev *sock = host->dev;
- struct mmc_host *mmc = tifm_get_drvdata(sock);
- unsigned long flags;
- spin_lock_irqsave(&sock->lock, flags);
- del_timer(&host->timer);
- host->flags |= HOST_REG;
- PREPARE_WORK(&host->cmd_handler,
- no_dma ? tifm_sd_end_cmd_nodma : tifm_sd_end_cmd);
- spin_unlock_irqrestore(&sock->lock, flags);
- dev_dbg(&sock->dev, "adding host\n");
- mmc_add_host(mmc);
+ 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)
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);
- setup_timer(&host->timer, tifm_sd_abort, (unsigned long)host);
-
tifm_set_drvdata(sock, mmc);
- sock->signal_irq = tifm_sd_signal_irq;
-
- host->clk_freq = 20000000;
+ 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->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;
mmc->max_sectors = 127;
mmc->max_seg_size = mmc->max_sectors << 11; //2k maximum hw block length
+ sock->signal_irq = tifm_sd_signal_irq;
+ rc = tifm_sd_initialize_host(host);
- 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);
-
- mod_timer(&host->timer, jiffies + host->timeout_jiffies);
+ if (!rc)
+ rc = mmc_add_host(mmc);
+ if (rc)
+ goto out_free_mmc;
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);
+out_free_mmc:
+ mmc_free_host(mmc);
return rc;
}
{
struct mmc_host *mmc = tifm_get_drvdata(sock);
struct tifm_sd *host = mmc_priv(mmc);
- unsigned long flags;
del_timer_sync(&host->timer);
- 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);
+ 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);
- 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, NULL);
mmc_free_host(mmc);
projects / linux-2.6 / commitdiff