mmc: omap: remove private DMA API implementation
Remove the private DMA API implementation from omap, making it use entirely the DMA engine API. Tested-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
parent
3451c06754
commit
4e078fbd58
|
|
@ -101,8 +101,6 @@
|
|||
|
||||
struct mmc_omap_host;
|
||||
|
||||
#define USE_DMA_PRIVATE
|
||||
|
||||
struct mmc_omap_slot {
|
||||
int id;
|
||||
unsigned int vdd;
|
||||
|
|
@ -162,12 +160,6 @@ struct mmc_omap_host {
|
|||
unsigned use_dma:1;
|
||||
unsigned brs_received:1, dma_done:1;
|
||||
unsigned dma_in_use:1;
|
||||
#ifdef USE_DMA_PRIVATE
|
||||
unsigned dma_is_read:1;
|
||||
int dma_ch;
|
||||
struct timer_list dma_timer;
|
||||
unsigned dma_len;
|
||||
#endif
|
||||
spinlock_t dma_lock;
|
||||
|
||||
struct mmc_omap_slot *slots[OMAP_MMC_MAX_SLOTS];
|
||||
|
|
@ -419,13 +411,6 @@ mmc_omap_release_dma(struct mmc_omap_host *host, struct mmc_data *data,
|
|||
struct device *dev = mmc_dev(host->mmc);
|
||||
struct dma_chan *c;
|
||||
|
||||
#ifdef USE_DMA_PRIVATE
|
||||
BUG_ON(host->dma_ch < 0);
|
||||
if (data->error)
|
||||
omap_stop_dma(host->dma_ch);
|
||||
/* Release DMA channel lazily */
|
||||
mod_timer(&host->dma_timer, jiffies + HZ);
|
||||
#endif
|
||||
if (data->flags & MMC_DATA_WRITE) {
|
||||
dma_data_dir = DMA_TO_DEVICE;
|
||||
c = host->dma_tx;
|
||||
|
|
@ -548,18 +533,6 @@ mmc_omap_end_of_data(struct mmc_omap_host *host, struct mmc_data *data)
|
|||
mmc_omap_xfer_done(host, data);
|
||||
}
|
||||
|
||||
#ifdef USE_DMA_PRIVATE
|
||||
static void
|
||||
mmc_omap_dma_timer(unsigned long data)
|
||||
{
|
||||
struct mmc_omap_host *host = (struct mmc_omap_host *) data;
|
||||
|
||||
BUG_ON(host->dma_ch < 0);
|
||||
omap_free_dma(host->dma_ch);
|
||||
host->dma_ch = -1;
|
||||
}
|
||||
#endif
|
||||
|
||||
static void
|
||||
mmc_omap_dma_done(struct mmc_omap_host *host, struct mmc_data *data)
|
||||
{
|
||||
|
|
@ -928,163 +901,6 @@ static void mmc_omap_dma_callback(void *priv)
|
|||
mmc_omap_dma_done(host, data);
|
||||
}
|
||||
|
||||
#ifdef USE_DMA_PRIVATE
|
||||
/* Prepare to transfer the next segment of a scatterlist */
|
||||
static void
|
||||
mmc_omap_prepare_dma(struct mmc_omap_host *host, struct mmc_data *data)
|
||||
{
|
||||
int dma_ch = host->dma_ch;
|
||||
unsigned long data_addr;
|
||||
u16 buf, frame;
|
||||
u32 count;
|
||||
struct scatterlist *sg = &data->sg[host->sg_idx];
|
||||
int src_port = 0;
|
||||
int dst_port = 0;
|
||||
int sync_dev = 0;
|
||||
|
||||
data_addr = host->phys_base + OMAP_MMC_REG(host, DATA);
|
||||
frame = data->blksz;
|
||||
count = sg_dma_len(sg);
|
||||
|
||||
if ((data->blocks == 1) && (count > data->blksz))
|
||||
count = frame;
|
||||
|
||||
host->dma_len = count;
|
||||
|
||||
/* FIFO is 16x2 bytes on 15xx, and 32x2 bytes on 16xx and 24xx.
|
||||
* Use 16 or 32 word frames when the blocksize is at least that large.
|
||||
* Blocksize is usually 512 bytes; but not for some SD reads.
|
||||
*/
|
||||
if (cpu_is_omap15xx() && frame > 32)
|
||||
frame = 32;
|
||||
else if (frame > 64)
|
||||
frame = 64;
|
||||
count /= frame;
|
||||
frame >>= 1;
|
||||
|
||||
if (!(data->flags & MMC_DATA_WRITE)) {
|
||||
buf = 0x800f | ((frame - 1) << 8);
|
||||
|
||||
if (cpu_class_is_omap1()) {
|
||||
src_port = OMAP_DMA_PORT_TIPB;
|
||||
dst_port = OMAP_DMA_PORT_EMIFF;
|
||||
}
|
||||
if (cpu_is_omap24xx())
|
||||
sync_dev = OMAP24XX_DMA_MMC1_RX;
|
||||
|
||||
omap_set_dma_src_params(dma_ch, src_port,
|
||||
OMAP_DMA_AMODE_CONSTANT,
|
||||
data_addr, 0, 0);
|
||||
omap_set_dma_dest_params(dma_ch, dst_port,
|
||||
OMAP_DMA_AMODE_POST_INC,
|
||||
sg_dma_address(sg), 0, 0);
|
||||
omap_set_dma_dest_data_pack(dma_ch, 1);
|
||||
omap_set_dma_dest_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
|
||||
} else {
|
||||
buf = 0x0f80 | ((frame - 1) << 0);
|
||||
|
||||
if (cpu_class_is_omap1()) {
|
||||
src_port = OMAP_DMA_PORT_EMIFF;
|
||||
dst_port = OMAP_DMA_PORT_TIPB;
|
||||
}
|
||||
if (cpu_is_omap24xx())
|
||||
sync_dev = OMAP24XX_DMA_MMC1_TX;
|
||||
|
||||
omap_set_dma_dest_params(dma_ch, dst_port,
|
||||
OMAP_DMA_AMODE_CONSTANT,
|
||||
data_addr, 0, 0);
|
||||
omap_set_dma_src_params(dma_ch, src_port,
|
||||
OMAP_DMA_AMODE_POST_INC,
|
||||
sg_dma_address(sg), 0, 0);
|
||||
omap_set_dma_src_data_pack(dma_ch, 1);
|
||||
omap_set_dma_src_burst_mode(dma_ch, OMAP_DMA_DATA_BURST_4);
|
||||
}
|
||||
|
||||
/* Max limit for DMA frame count is 0xffff */
|
||||
BUG_ON(count > 0xffff);
|
||||
|
||||
OMAP_MMC_WRITE(host, BUF, buf);
|
||||
omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S16,
|
||||
frame, count, OMAP_DMA_SYNC_FRAME,
|
||||
sync_dev, 0);
|
||||
}
|
||||
|
||||
/* A scatterlist segment completed */
|
||||
static void mmc_omap_dma_cb(int lch, u16 ch_status, void *data)
|
||||
{
|
||||
struct mmc_omap_host *host = (struct mmc_omap_host *) data;
|
||||
struct mmc_data *mmcdat = host->data;
|
||||
|
||||
if (unlikely(host->dma_ch < 0)) {
|
||||
dev_err(mmc_dev(host->mmc),
|
||||
"DMA callback while DMA not enabled\n");
|
||||
return;
|
||||
}
|
||||
/* FIXME: We really should do something to _handle_ the errors */
|
||||
if (ch_status & OMAP1_DMA_TOUT_IRQ) {
|
||||
dev_err(mmc_dev(host->mmc),"DMA timeout\n");
|
||||
return;
|
||||
}
|
||||
if (ch_status & OMAP_DMA_DROP_IRQ) {
|
||||
dev_err(mmc_dev(host->mmc), "DMA sync error\n");
|
||||
return;
|
||||
}
|
||||
if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) {
|
||||
return;
|
||||
}
|
||||
mmcdat->bytes_xfered += host->dma_len;
|
||||
host->sg_idx++;
|
||||
if (host->sg_idx < host->sg_len) {
|
||||
mmc_omap_prepare_dma(host, host->data);
|
||||
omap_start_dma(host->dma_ch);
|
||||
} else
|
||||
mmc_omap_dma_done(host, host->data);
|
||||
}
|
||||
|
||||
static int mmc_omap_get_dma_channel(struct mmc_omap_host *host, struct mmc_data *data)
|
||||
{
|
||||
const char *dma_dev_name;
|
||||
int sync_dev, dma_ch, is_read, r;
|
||||
|
||||
is_read = !(data->flags & MMC_DATA_WRITE);
|
||||
del_timer_sync(&host->dma_timer);
|
||||
if (host->dma_ch >= 0) {
|
||||
if (is_read == host->dma_is_read)
|
||||
return 0;
|
||||
omap_free_dma(host->dma_ch);
|
||||
host->dma_ch = -1;
|
||||
}
|
||||
|
||||
if (is_read) {
|
||||
if (host->id == 0) {
|
||||
sync_dev = OMAP_DMA_MMC_RX;
|
||||
dma_dev_name = "MMC1 read";
|
||||
} else {
|
||||
sync_dev = OMAP_DMA_MMC2_RX;
|
||||
dma_dev_name = "MMC2 read";
|
||||
}
|
||||
} else {
|
||||
if (host->id == 0) {
|
||||
sync_dev = OMAP_DMA_MMC_TX;
|
||||
dma_dev_name = "MMC1 write";
|
||||
} else {
|
||||
sync_dev = OMAP_DMA_MMC2_TX;
|
||||
dma_dev_name = "MMC2 write";
|
||||
}
|
||||
}
|
||||
r = omap_request_dma(sync_dev, dma_dev_name, mmc_omap_dma_cb,
|
||||
host, &dma_ch);
|
||||
if (r != 0) {
|
||||
dev_dbg(mmc_dev(host->mmc), "omap_request_dma() failed with %d\n", r);
|
||||
return r;
|
||||
}
|
||||
host->dma_ch = dma_ch;
|
||||
host->dma_is_read = is_read;
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static inline void set_cmd_timeout(struct mmc_omap_host *host, struct mmc_request *req)
|
||||
{
|
||||
u16 reg;
|
||||
|
|
@ -1229,38 +1045,13 @@ mmc_omap_prepare_data(struct mmc_omap_host *host, struct mmc_request *req)
|
|||
return;
|
||||
}
|
||||
use_pio:
|
||||
#ifdef USE_DMA_PRIVATE
|
||||
if (use_dma) {
|
||||
if (mmc_omap_get_dma_channel(host, data) == 0) {
|
||||
enum dma_data_direction dma_data_dir;
|
||||
|
||||
if (data->flags & MMC_DATA_WRITE)
|
||||
dma_data_dir = DMA_TO_DEVICE;
|
||||
else
|
||||
dma_data_dir = DMA_FROM_DEVICE;
|
||||
|
||||
host->sg_len = dma_map_sg(mmc_dev(host->mmc), data->sg,
|
||||
sg_len, dma_data_dir);
|
||||
host->total_bytes_left = 0;
|
||||
mmc_omap_prepare_dma(host, req->data);
|
||||
host->brs_received = 0;
|
||||
host->dma_done = 0;
|
||||
host->dma_in_use = 1;
|
||||
} else
|
||||
use_dma = 0;
|
||||
}
|
||||
#else
|
||||
use_dma = 0;
|
||||
#endif
|
||||
|
||||
/* Revert to PIO? */
|
||||
if (!use_dma) {
|
||||
OMAP_MMC_WRITE(host, BUF, 0x1f1f);
|
||||
host->total_bytes_left = data->blocks * block_size;
|
||||
host->sg_len = sg_len;
|
||||
mmc_omap_sg_to_buf(host);
|
||||
host->dma_in_use = 0;
|
||||
}
|
||||
OMAP_MMC_WRITE(host, BUF, 0x1f1f);
|
||||
host->total_bytes_left = data->blocks * block_size;
|
||||
host->sg_len = sg_len;
|
||||
mmc_omap_sg_to_buf(host);
|
||||
host->dma_in_use = 0;
|
||||
}
|
||||
|
||||
static void mmc_omap_start_request(struct mmc_omap_host *host,
|
||||
|
|
@ -1277,12 +1068,7 @@ static void mmc_omap_start_request(struct mmc_omap_host *host,
|
|||
struct dma_chan *c = host->data->flags & MMC_DATA_WRITE ?
|
||||
host->dma_tx : host->dma_rx;
|
||||
|
||||
if (c)
|
||||
dma_async_issue_pending(c);
|
||||
#ifdef USE_DMA_PRIVATE
|
||||
else
|
||||
omap_start_dma(host->dma_ch);
|
||||
#endif
|
||||
dma_async_issue_pending(c);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -1566,9 +1352,6 @@ static int __devinit mmc_omap_probe(struct platform_device *pdev)
|
|||
setup_timer(&host->clk_timer, mmc_omap_clk_timer, (unsigned long) host);
|
||||
|
||||
spin_lock_init(&host->dma_lock);
|
||||
#ifdef USE_DMA_PRIVATE
|
||||
setup_timer(&host->dma_timer, mmc_omap_dma_timer, (unsigned long) host);
|
||||
#endif
|
||||
spin_lock_init(&host->slot_lock);
|
||||
init_waitqueue_head(&host->slot_wq);
|
||||
|
||||
|
|
@ -1579,13 +1362,7 @@ static int __devinit mmc_omap_probe(struct platform_device *pdev)
|
|||
host->id = pdev->id;
|
||||
host->mem_res = res;
|
||||
host->irq = irq;
|
||||
|
||||
host->use_dma = 1;
|
||||
#ifdef USE_DMA_PRIVATE
|
||||
host->dev->dma_mask = &pdata->dma_mask;
|
||||
host->dma_ch = -1;
|
||||
#endif
|
||||
|
||||
host->irq = irq;
|
||||
host->phys_base = host->mem_res->start;
|
||||
host->virt_base = ioremap(res->start, resource_size(res));
|
||||
|
|
|
|||
Loading…
Reference in New Issue