static void
msmsdcc_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct msmsdcc_host *host = mmc_priv(mmc);
unsigned long flags;
WARN_ON(host->curr.mrq != NULL);
WARN_ON(host->pwr == 0);
spin_lock_irqsave(&host->lock, flags);
host->stats.reqs++;
if (host->eject) {
if (mrq->data && !(mrq->data->flags & MMC_DATA_READ)) {
mrq->cmd->error = 0;
mrq->data->bytes_xfered = mrq->data->blksz *
mrq->data->blocks;
} else
mrq->cmd->error = -ENOMEDIUM;
spin_unlock_irqrestore(&host->lock, flags);
mmc_request_done(mmc, mrq);
return;
}
host->curr.mrq = mrq;
if (mrq->data && mrq->data->flags & MMC_DATA_READ)
msmsdcc_start_data(host, mrq->data);
msmsdcc_start_command(host, mrq->cmd, 0);
if (host->cmdpoll && !msmsdcc_spin_on_status(host,
MCI_CMDRESPEND|MCI_CMDCRCFAIL|MCI_CMDTIMEOUT,
CMD_SPINMAX)) {
uint32_t status = readl(host->base + MMCISTATUS);
msmsdcc_do_cmdirq(host, status);
writel(MCI_CMDRESPEND | MCI_CMDCRCFAIL | MCI_CMDTIMEOUT,
host->base + MMCICLEAR);
host->stats.cmdpoll_hits++;
} else {
host->stats.cmdpoll_misses++;
mod_timer(&host->command_timer, jiffies + HZ);
}
spin_unlock_irqrestore(&host->lock, flags);
}
static irqreturn_t
msmsdcc_pio_irq(int irq, void *dev_id)
{
struct msmsdcc_host *host = dev_id;
void __iomem *base = host->base;
uint32_t status;
status = readl(base + MMCISTATUS);
#if IRQ_DEBUG
msmsdcc_print_status(host, "irq1-r", status);
#endif
/* SEMC_BEGIN (Crash on irq when data already handled - DMS00718508) */
// do {
while (host->pio.sg) {
/* SEMC_END (Crash on irq when data already handled - DMS00718508) */
unsigned long flags;
unsigned int remain, len;
char *buffer;
if (!(status & (MCI_TXFIFOHALFEMPTY | MCI_RXDATAAVLBL))) {
if (host->curr.xfer_remain == 0 || !msmsdcc_piopoll)
break;
if (msmsdcc_spin_on_status(host,
(MCI_TXFIFOHALFEMPTY |
MCI_RXDATAAVLBL),
PIO_SPINMAX)) {
break;
}
}
/* Map the current scatter buffer */
local_irq_save(flags);
buffer = kmap_atomic(sg_page(host->pio.sg),
KM_BIO_SRC_IRQ) + host->pio.sg->offset;
buffer += host->pio.sg_off;
remain = host->pio.sg->length - host->pio.sg_off;
len = 0;
if (status & MCI_RXACTIVE)
len = msmsdcc_pio_read(host, buffer, remain);
if (status & MCI_TXACTIVE)
len = msmsdcc_pio_write(host, buffer, remain, status);
/* Unmap the buffer */
kunmap_atomic(buffer, KM_BIO_SRC_IRQ);
local_irq_restore(flags);
host->pio.sg_off += len;
host->curr.xfer_remain -= len;
host->curr.data_xfered += len;
remain -= len;
if (remain == 0) {
/* This sg page is full - do some housekeeping */
if (status & MCI_RXACTIVE && host->curr.user_pages)
flush_dcache_page(sg_page(host->pio.sg));
if (!--host->pio.sg_len) {
memset(&host->pio, 0, sizeof(host->pio));
break;
}
/* Advance to next sg */
host->pio.sg++;
host->pio.sg_off = 0;
}
status = readl(base + MMCISTATUS);
/* SEMC_BEGIN (Crash on irq when data already handled - DMS00718508) */
// } while (1);
}
/* SEMC_END (Crash on irq when data already handled - DMS00718508) */
if (status & MCI_RXACTIVE && host->curr.xfer_remain < MCI_FIFOSIZE)
writel(MCI_RXDATAAVLBLMASK, base + MMCIMASK1);
if (!host->curr.xfer_remain)
writel(0, base + MMCIMASK1);
return IRQ_HANDLED;
}
static int
msmsdcc_pio_irq(int irq, void *dev_id)
{
struct msmsdcc_host *host = dev_id;
void __iomem *base = host->base;
uint32_t status;
status = readl(base + MMCISTATUS);
#if IRQ_DEBUG
msmsdcc_print_status(host, "irq1-r", status);
#endif
/* SEMC:LC: Update for DMS00768370 start */
//do { /*original*/
while(host->pio.sg){
/* SEMC:LC: Update for DMS00768370 end */
unsigned long flags;
unsigned int remain, len;
char *buffer;
if (!(status & (MCI_TXFIFOHALFEMPTY | MCI_RXDATAAVLBL))) {
if (host->curr.xfer_remain == 0 || !msmsdcc_piopoll)
break;
if (msmsdcc_spin_on_status(host,
(MCI_TXFIFOHALFEMPTY |
MCI_RXDATAAVLBL),
PIO_SPINMAX)) {
break;
}
}
/* Map the current scatter buffer */
local_irq_save(flags);
buffer = kmap_atomic(sg_page(host->pio.sg),
KM_BIO_SRC_IRQ) + host->pio.sg->offset;
buffer += host->pio.sg_off;
remain = host->pio.sg->length - host->pio.sg_off;
len = 0;
if (status & MCI_RXACTIVE)
len = msmsdcc_pio_read(host, buffer, remain);
if (status & MCI_TXACTIVE)
len = msmsdcc_pio_write(host, buffer, remain, status);
/* Unmap the buffer */
kunmap_atomic(buffer, KM_BIO_SRC_IRQ);
local_irq_restore(flags);
host->pio.sg_off += len;
host->curr.xfer_remain -= len;
host->curr.data_xfered += len;
remain -= len;
if (remain == 0) {
/* This sg page is full - do some housekeeping */
if (status & MCI_RXACTIVE && host->curr.user_pages)
flush_dcache_page(sg_page(host->pio.sg));
if (!--host->pio.sg_len) {
memset(&host->pio, 0, sizeof(host->pio));
break;
}
/* Advance to next sg */
host->pio.sg++;
host->pio.sg_off = 0;
}
status = readl(base + MMCISTATUS);
/* SEMC:LC: Update for DMS00768370 start */
//} while (1); /*original*/
}
/* SEMC:LC: Update for DMS00768370 end */
if (status & MCI_RXACTIVE && host->curr.xfer_remain < MCI_FIFOSIZE)
writel(MCI_RXDATAAVLBLMASK, base + MMCIMASK1);
/* ATHENV */
#ifdef ATH_PATCH
if (!host->curr.xfer_remain) {
if (host->pdev_id == ATH_WLAN_SLOT) {
if (readl(host->base + MMCIMASK0) &
MCI_SDIOINTOPERMASK)
writel(MCI_SDIOINTOPERMASK, base + MMCIMASK1);
else
writel(0, base + MMCIMASK1);
} else {
writel(0, base + MMCIMASK1);
}
}
#else
if (!host->curr.xfer_remain)
writel(0, base + MMCIMASK1);
#endif
/* ATHENV */
return IRQ_HANDLED;
}