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authorAlex Dubov <oakad@yahoo.com>2007-11-14 23:55:36 +1100
committerPierre Ossman <drzeus@drzeus.cx>2007-11-21 18:42:45 +0100
commitb37a05069b9ab9fb1e52393a3448d710c50c54d5 (patch)
tree04de6bb95d9835e96c9b2c269348206570160ce4 /drivers/mmc
parentd198f101989d9bb950327f0d043f6203bb862343 (diff)
downloadop-kernel-dev-b37a05069b9ab9fb1e52393a3448d710c50c54d5.zip
op-kernel-dev-b37a05069b9ab9fb1e52393a3448d710c50c54d5.tar.gz
tifm_sd: handle non-power-of-2 block sizes
It is possible to handle arbitrary block sizes with tifm card reader by conditionally switching to PIO in case such block has to be delivered. At the beginning of each request, DMA is either disabled (non-power-of-2 block size) or set to load time user preference. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/tifm_sd.c18
1 files changed, 7 insertions, 11 deletions
diff --git a/drivers/mmc/host/tifm_sd.c b/drivers/mmc/host/tifm_sd.c
index c11a3d2..20d5c7b 100644
--- a/drivers/mmc/host/tifm_sd.c
+++ b/drivers/mmc/host/tifm_sd.c
@@ -16,7 +16,6 @@
#include <linux/mmc/host.h>
#include <linux/highmem.h>
#include <linux/scatterlist.h>
-#include <linux/log2.h>
#include <asm/io.h>
#define DRIVER_NAME "tifm_sd"
@@ -638,17 +637,15 @@ static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq)
goto err_out;
}
- if (mrq->data && !is_power_of_2(mrq->data->blksz)) {
- printk(KERN_ERR "%s: Unsupported block size (%d bytes)\n",
- sock->dev.bus_id, mrq->data->blksz);
- mrq->cmd->error = -EINVAL;
- goto err_out;
- }
-
host->cmd_flags = 0;
host->block_pos = 0;
host->sg_pos = 0;
+ if (mrq->data && !is_power_of_2(mrq->data->blksz))
+ host->no_dma = 1;
+ else
+ host->no_dma = no_dma ? 1 : 0;
+
if (r_data) {
tifm_sd_set_data_timeout(host, r_data);
@@ -676,7 +673,7 @@ static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq)
: PCI_DMA_FROMDEVICE)) {
printk(KERN_ERR "%s : scatterlist map failed\n",
sock->dev.bus_id);
- spin_unlock_irqrestore(&sock->lock, flags);
+ mrq->cmd->error = -ENOMEM;
goto err_out;
}
host->sg_len = tifm_map_sg(sock, r_data->sg,
@@ -692,7 +689,7 @@ static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq)
r_data->flags & MMC_DATA_WRITE
? PCI_DMA_TODEVICE
: PCI_DMA_FROMDEVICE);
- spin_unlock_irqrestore(&sock->lock, flags);
+ mrq->cmd->error = -ENOMEM;
goto err_out;
}
@@ -966,7 +963,6 @@ static int tifm_sd_probe(struct tifm_dev *sock)
return -ENOMEM;
host = mmc_priv(mmc);
- host->no_dma = no_dma;
tifm_set_drvdata(sock, mmc);
host->dev = sock;
host->timeout_jiffies = msecs_to_jiffies(1000);
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