static void
goldfish_mmc_end_of_data(struct goldfish_mmc_host *host, struct mmc_data *data)
{
if (!host->dma_in_use) {
goldfish_mmc_xfer_done(host, data);
return;
}
if (host->dma_done)
goldfish_mmc_xfer_done(host, data);
}
static irqreturn_t goldfish_mmc_irq(int irq, void *dev_id)
{
struct goldfish_mmc_host * host = (struct goldfish_mmc_host *)dev_id;
u16 status;
int end_command = 0;
int end_transfer = 0;
int transfer_error = 0;
int state_changed = 0;
int cmd_timeout = 0;
while ((status = GOLDFISH_MMC_READ(host, MMC_INT_STATUS)) != 0) {
GOLDFISH_MMC_WRITE(host, MMC_INT_STATUS, status);
if (status & MMC_STAT_END_OF_CMD) {
end_command = 1;
}
if (status & MMC_STAT_END_OF_DATA) {
end_transfer = 1;
}
if (status & MMC_STAT_STATE_CHANGE) {
state_changed = 1;
}
if (status & MMC_STAT_CMD_TIMEOUT) {
end_command = 0;
cmd_timeout = 1;
}
}
if (cmd_timeout) {
struct mmc_request *mrq = host->mrq;
mrq->cmd->error = -ETIMEDOUT;
host->mrq = NULL;
mmc_request_done(host->mmc, mrq);
}
if (end_command) {
goldfish_mmc_cmd_done(host, host->cmd);
}
if (transfer_error)
goldfish_mmc_xfer_done(host, host->data);
else if (end_transfer) {
host->dma_done = 1;
goldfish_mmc_end_of_data(host, host->data);
} else if (host->data != NULL && host->mrq->cmd->opcode == 13) {
/*
* WORKAROUND -- after porting this driver from 2.6 to 3.4,
* this case pops up during device initialization.
* This happens as the host stack is sending ACMD13 which
* involves data read while goldfish emulator implementation
* only supports CMD13 which does not have data phase.
* The workaround works by passing garbage result to the stack.
* TODO -- To implement proper response
*/
host->dma_done = 1;
goldfish_mmc_end_of_data(host, host->data);
}
if (state_changed) {
u32 state = GOLDFISH_MMC_READ(host, MMC_STATE);
pr_info("%s: Card detect now %d\n", __func__,
(state & MMC_STATE_INSERTED));
mmc_detect_change(host->mmc, 0);
}
if (!end_command && !end_transfer &&
!transfer_error && !state_changed && !cmd_timeout) {
status = GOLDFISH_MMC_READ(host, MMC_INT_STATUS);
dev_info(mmc_dev(host->mmc),"spurious irq 0x%04x\n", status);
if (status != 0) {
GOLDFISH_MMC_WRITE(host, MMC_INT_STATUS, status);
GOLDFISH_MMC_WRITE(host, MMC_INT_ENABLE, 0);
}
}
return IRQ_HANDLED;
}
static irqreturn_t goldfish_mmc_irq(int irq, void *dev_id)
{
struct goldfish_mmc_host * host = (struct goldfish_mmc_host *)dev_id;
u16 status;
int end_command = 0;
int end_transfer = 0;
int transfer_error = 0;
int state_changed = 0;
int cmd_timeout = 0;
while ((status = GOLDFISH_MMC_READ(host, MMC_INT_STATUS)) != 0) {
GOLDFISH_MMC_WRITE(host, MMC_INT_STATUS, status);
if (status & MMC_STAT_END_OF_CMD) {
end_command = 1;
}
if (status & MMC_STAT_END_OF_DATA) {
end_transfer = 1;
}
if (status & MMC_STAT_STATE_CHANGE) {
state_changed = 1;
}
if (status & MMC_STAT_CMD_TIMEOUT) {
end_command = 0;
cmd_timeout = 1;
}
}
if (cmd_timeout) {
struct mmc_request *mrq = host->mrq;
mrq->cmd->error = -ETIMEDOUT;
host->mrq = NULL;
mmc_request_done(host->mmc, mrq);
}
if (end_command) {
goldfish_mmc_cmd_done(host, host->cmd);
}
if (transfer_error)
goldfish_mmc_xfer_done(host, host->data);
else if (end_transfer) {
host->dma_done = 1;
goldfish_mmc_end_of_data(host, host->data);
}
if (state_changed) {
u32 state = GOLDFISH_MMC_READ(host, MMC_STATE);
pr_info("%s: Card detect now %d\n", __func__,
(state & MMC_STATE_INSERTED));
mmc_detect_change(host->mmc, 0);
}
if (!end_command && !end_transfer &&
!transfer_error && !state_changed && !cmd_timeout) {
status = GOLDFISH_MMC_READ(host, MMC_INT_STATUS);
dev_info(mmc_dev(host->mmc),"spurious irq 0x%04x\n", status);
if (status != 0) {
GOLDFISH_MMC_WRITE(host, MMC_INT_STATUS, status);
GOLDFISH_MMC_WRITE(host, MMC_INT_ENABLE, 0);
}
}
return IRQ_HANDLED;
}
