#include "core.h"
#include "bus.h"
#include "host.h"
+#include "sdio_bus.h"
#include "mmc_ops.h"
#include "sd_ops.h"
+#include "sdio_ops.h"
extern int mmc_attach_mmc(struct mmc_host *host, u32 ocr);
extern int mmc_attach_sd(struct mmc_host *host, u32 ocr);
+extern int mmc_attach_sdio(struct mmc_host *host, u32 ocr);
static struct workqueue_struct *workqueue;
struct mmc_command *cmd = mrq->cmd;
int err = cmd->error;
- pr_debug("%s: req done (CMD%u): %d/%d/%d: %08x %08x %08x %08x\n",
- mmc_hostname(host), cmd->opcode, err,
- mrq->data ? mrq->data->error : 0,
- mrq->stop ? mrq->stop->error : 0,
- cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]);
-
if (err && cmd->retries) {
+ pr_debug("%s: req failed (CMD%u): %d, retrying...\n",
+ mmc_hostname(host), cmd->opcode, err);
+
cmd->retries--;
cmd->error = 0;
host->ops->request(host, mrq);
- } else if (mrq->done) {
- mrq->done(mrq);
+ } else {
+ pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n",
+ mmc_hostname(host), cmd->opcode, err,
+ cmd->resp[0], cmd->resp[1],
+ cmd->resp[2], cmd->resp[3]);
+
+ if (mrq->data) {
+ pr_debug("%s: %d bytes transferred: %d\n",
+ mmc_hostname(host),
+ mrq->data->bytes_xfered, mrq->data->error);
+ }
+
+ if (mrq->stop) {
+ pr_debug("%s: (CMD%u): %d: %08x %08x %08x %08x\n",
+ mmc_hostname(host), mrq->stop->opcode,
+ mrq->stop->error,
+ mrq->stop->resp[0], mrq->stop->resp[1],
+ mrq->stop->resp[2], mrq->stop->resp[3]);
+ }
+
+ if (mrq->done)
+ mrq->done(mrq);
}
}
EXPORT_SYMBOL(mmc_request_done);
-/**
- * mmc_start_request - start a command on a host
- * @host: MMC host to start command on
- * @mrq: MMC request to start
- *
- * Queue a command on the specified host. We expect the
- * caller to be holding the host lock with interrupts disabled.
- */
-void
+static void
mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
{
#ifdef CONFIG_MMC_DEBUG
mmc_hostname(host), mrq->cmd->opcode,
mrq->cmd->arg, mrq->cmd->flags);
+ if (mrq->data) {
+ pr_debug("%s: blksz %d blocks %d flags %08x "
+ "tsac %d ms nsac %d\n",
+ mmc_hostname(host), mrq->data->blksz,
+ mrq->data->blocks, mrq->data->flags,
+ mrq->data->timeout_ns / 1000000,
+ mrq->data->timeout_clks);
+ }
+
+ if (mrq->stop) {
+ pr_debug("%s: CMD%u arg %08x flags %08x\n",
+ mmc_hostname(host), mrq->stop->opcode,
+ mrq->stop->arg, mrq->stop->flags);
+ }
+
WARN_ON(!host->claimed);
mrq->cmd->error = 0;
host->ops->request(host, mrq);
}
-EXPORT_SYMBOL(mmc_start_request);
-
static void mmc_wait_done(struct mmc_request *mrq)
{
complete(mrq->done_data);
}
-int mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
+/**
+ * mmc_wait_for_req - start a request and wait for completion
+ * @host: MMC host to start command
+ * @mrq: MMC request to start
+ *
+ * Start a new MMC custom command request for a host, and wait
+ * for the command to complete. Does not attempt to parse the
+ * response.
+ */
+void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
{
DECLARE_COMPLETION_ONSTACK(complete);
mmc_start_request(host, mrq);
wait_for_completion(&complete);
-
- return 0;
}
EXPORT_SYMBOL(mmc_wait_for_req);
* mmc_set_data_timeout - set the timeout for a data command
* @data: data phase for command
* @card: the MMC card associated with the data transfer
- * @write: flag to differentiate reads from writes
+ *
+ * Computes the data timeout parameters according to the
+ * correct algorithm given the card type.
*/
-void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card,
- int write)
+void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card)
{
unsigned int mult;
+ /*
+ * SDIO cards only define an upper 1 s limit on access.
+ */
+ if (mmc_card_sdio(card)) {
+ data->timeout_ns = 1000000000;
+ data->timeout_clks = 0;
+ return;
+ }
+
/*
* SD cards use a 100 multiplier rather than 10
*/
* Scale up the multiplier (and therefore the timeout) by
* the r2w factor for writes.
*/
- if (write)
+ if (data->flags & MMC_DATA_WRITE)
mult <<= card->csd.r2w_factor;
data->timeout_ns = card->csd.tacc_ns * mult;
timeout_us += data->timeout_clks * 1000 /
(card->host->ios.clock / 1000);
- if (write)
+ if (data->flags & MMC_DATA_WRITE)
limit_us = 250000;
else
limit_us = 100000;
/**
* __mmc_claim_host - exclusively claim a host
* @host: mmc host to claim
- * @card: mmc card to claim host for
- *
- * Claim a host for a set of operations. If a valid card
- * is passed and this wasn't the last card selected, select
- * the card before returning.
+ * @abort: whether or not the operation should be aborted
*
- * Note: you should use mmc_card_claim_host or mmc_claim_host.
+ * Claim a host for a set of operations. If @abort is non null and
+ * dereference a non-zero value then this will return prematurely with
+ * that non-zero value without acquiring the lock. Returns zero
+ * with the lock held otherwise.
*/
-void mmc_claim_host(struct mmc_host *host)
+int __mmc_claim_host(struct mmc_host *host, atomic_t *abort)
{
DECLARE_WAITQUEUE(wait, current);
unsigned long flags;
+ int stop;
+
+ might_sleep();
add_wait_queue(&host->wq, &wait);
spin_lock_irqsave(&host->lock, flags);
while (1) {
set_current_state(TASK_UNINTERRUPTIBLE);
- if (!host->claimed)
+ stop = abort ? atomic_read(abort) : 0;
+ if (stop || !host->claimed)
break;
spin_unlock_irqrestore(&host->lock, flags);
schedule();
spin_lock_irqsave(&host->lock, flags);
}
set_current_state(TASK_RUNNING);
- host->claimed = 1;
+ if (!stop)
+ host->claimed = 1;
+ else
+ wake_up(&host->wq);
spin_unlock_irqrestore(&host->lock, flags);
remove_wait_queue(&host->wq, &wait);
+ return stop;
}
-EXPORT_SYMBOL(mmc_claim_host);
+EXPORT_SYMBOL(__mmc_claim_host);
/**
* mmc_release_host - release a host
mmc_set_ios(host);
}
+/*
+ * Cleanup when the last reference to the bus operator is dropped.
+ */
+void __mmc_release_bus(struct mmc_host *host)
+{
+ BUG_ON(!host);
+ BUG_ON(host->bus_refs);
+ BUG_ON(!host->bus_dead);
+
+ host->bus_ops = NULL;
+}
+
+/*
+ * Increase reference count of bus operator
+ */
+static inline void mmc_bus_get(struct mmc_host *host)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+ host->bus_refs++;
+ spin_unlock_irqrestore(&host->lock, flags);
+}
+
+/*
+ * Decrease reference count of bus operator and free it if
+ * it is the last reference.
+ */
+static inline void mmc_bus_put(struct mmc_host *host)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+ host->bus_refs--;
+ if ((host->bus_refs == 0) && host->bus_ops)
+ __mmc_release_bus(host);
+ spin_unlock_irqrestore(&host->lock, flags);
+}
+
/*
* Assign a mmc bus handler to a host. Only one bus handler may control a
* host at any given time.
mmc_bus_put(host);
}
-/*
- * Cleanup when the last reference to the bus operator is dropped.
- */
-void __mmc_release_bus(struct mmc_host *host)
-{
- BUG_ON(!host);
- BUG_ON(host->bus_refs);
- BUG_ON(!host->bus_dead);
-
- host->bus_ops = NULL;
-}
-
/**
* mmc_detect_change - process change of state on a MMC socket
* @host: host which changed state.
* @delay: optional delay to wait before detection (jiffies)
*
- * All we know is that card(s) have been inserted or removed
- * from the socket(s). We don't know which socket or cards.
+ * MMC drivers should call this when they detect a card has been
+ * inserted or removed. The MMC layer will confirm that any
+ * present card is still functional, and initialize any newly
+ * inserted.
*/
void mmc_detect_change(struct mmc_host *host, unsigned long delay)
{
mmc_send_if_cond(host, host->ocr_avail);
+ /*
+ * First we search for SDIO...
+ */
+ err = mmc_send_io_op_cond(host, 0, &ocr);
+ if (!err) {
+ if (mmc_attach_sdio(host, ocr))
+ mmc_power_off(host);
+ return;
+ }
+
+ /*
+ * ...then normal SD...
+ */
err = mmc_send_app_op_cond(host, 0, &ocr);
- if (err == MMC_ERR_NONE) {
+ if (!err) {
if (mmc_attach_sd(host, ocr))
mmc_power_off(host);
- } else {
- /*
- * If we fail to detect any SD cards then try
- * searching for MMC cards.
- */
- err = mmc_send_op_cond(host, 0, &ocr);
- if (err == MMC_ERR_NONE) {
- if (mmc_attach_mmc(host, ocr))
- mmc_power_off(host);
- } else {
+ return;
+ }
+
+ /*
+ * ...and finally MMC.
+ */
+ err = mmc_send_op_cond(host, 0, &ocr);
+ if (!err) {
+ if (mmc_attach_mmc(host, ocr))
mmc_power_off(host);
- mmc_release_host(host);
- }
+ return;
}
+
+ mmc_release_host(host);
+ mmc_power_off(host);
} else {
if (host->bus_ops->detect && !host->bus_dead)
host->bus_ops->detect(host);
return -ENOMEM;
ret = mmc_register_bus();
- if (ret == 0) {
- ret = mmc_register_host_class();
- if (ret)
- mmc_unregister_bus();
- }
+ if (ret)
+ goto destroy_workqueue;
+
+ ret = mmc_register_host_class();
+ if (ret)
+ goto unregister_bus;
+
+ ret = sdio_register_bus();
+ if (ret)
+ goto unregister_host_class;
+
+ return 0;
+
+unregister_host_class:
+ mmc_unregister_host_class();
+unregister_bus:
+ mmc_unregister_bus();
+destroy_workqueue:
+ destroy_workqueue(workqueue);
+
return ret;
}
static void __exit mmc_exit(void)
{
+ sdio_unregister_bus();
mmc_unregister_host_class();
mmc_unregister_bus();
destroy_workqueue(workqueue);
}
-module_init(mmc_init);
+subsys_initcall(mmc_init);
module_exit(mmc_exit);
MODULE_LICENSE("GPL");
projects / linux-2.6-omap-h63xx.git / blobdiff