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authorMarek Vasut <marex@denx.de>2012-08-03 17:26:12 +0200
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-08-17 22:54:15 +0100
commit65defb9b3ba67c1d6f88ac62c24644eb23a7b676 (patch)
tree68b68b0eb966f6691353363deea65de0d1ea06d1
parent646781d3325cdcc648b8eeb3b7cda393bcb78659 (diff)
downloadlinux-linaro-stable-65defb9b3ba67c1d6f88ac62c24644eb23a7b676.tar.gz
mmc: spi: Pull out common DMA parts from MXS MMC
These parts will be used by the MXS SPI driver too. Signed-off-by: Marek Vasut <marex@denx.de> Acked-by: Chris Ball <cjb@laptop.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
-rw-r--r--drivers/mmc/host/mxs-mmc.c88
-rw-r--r--drivers/spi/spi-mxs.c1
-rw-r--r--include/linux/spi/mxs-spi.h9
3 files changed, 51 insertions, 47 deletions
diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index 0813340fa29c..4da996654772 100644
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -41,7 +41,6 @@
#include <linux/gpio.h>
#include <linux/regulator/consumer.h>
#include <linux/module.h>
-#include <linux/fsl/mxs-dma.h>
#include <linux/pinctrl/consumer.h>
#include <linux/stmp_device.h>
#include <linux/mmc/mxs-mmc.h>
@@ -69,13 +68,6 @@ struct mxs_mmc_host {
struct mmc_command *cmd;
struct mmc_data *data;
- int dma_channel;
- struct dma_chan *dmach;
- struct mxs_dma_data dma_data;
- unsigned int dma_dir;
- enum dma_transfer_direction slave_dirn;
- u32 ssp_pio_words[SSP_PIO_NUM];
-
unsigned char bus_width;
spinlock_t lock;
int sdio_irq_en;
@@ -163,7 +155,7 @@ static void mxs_mmc_request_done(struct mxs_mmc_host *host)
if (data) {
dma_unmap_sg(mmc_dev(host->mmc), data->sg,
- data->sg_len, host->dma_dir);
+ data->sg_len, ssp->dma_dir);
/*
* If there was an error on any block, we mark all
* data blocks as being in error.
@@ -232,6 +224,7 @@ static irqreturn_t mxs_mmc_irq_handler(int irq, void *dev_id)
static struct dma_async_tx_descriptor *mxs_mmc_prep_dma(
struct mxs_mmc_host *host, unsigned long flags)
{
+ struct mxs_ssp *ssp = &host->ssp;
struct dma_async_tx_descriptor *desc;
struct mmc_data *data = host->data;
struct scatterlist * sgl;
@@ -240,24 +233,24 @@ static struct dma_async_tx_descriptor *mxs_mmc_prep_dma(
if (data) {
/* data */
dma_map_sg(mmc_dev(host->mmc), data->sg,
- data->sg_len, host->dma_dir);
+ data->sg_len, ssp->dma_dir);
sgl = data->sg;
sg_len = data->sg_len;
} else {
/* pio */
- sgl = (struct scatterlist *) host->ssp_pio_words;
+ sgl = (struct scatterlist *) ssp->ssp_pio_words;
sg_len = SSP_PIO_NUM;
}
- desc = dmaengine_prep_slave_sg(host->dmach,
- sgl, sg_len, host->slave_dirn, flags);
+ desc = dmaengine_prep_slave_sg(ssp->dmach,
+ sgl, sg_len, ssp->slave_dirn, flags);
if (desc) {
desc->callback = mxs_mmc_dma_irq_callback;
desc->callback_param = host;
} else {
if (data)
dma_unmap_sg(mmc_dev(host->mmc), data->sg,
- data->sg_len, host->dma_dir);
+ data->sg_len, ssp->dma_dir);
}
return desc;
@@ -265,6 +258,7 @@ static struct dma_async_tx_descriptor *mxs_mmc_prep_dma(
static void mxs_mmc_bc(struct mxs_mmc_host *host)
{
+ struct mxs_ssp *ssp = &host->ssp;
struct mmc_command *cmd = host->cmd;
struct dma_async_tx_descriptor *desc;
u32 ctrl0, cmd0, cmd1;
@@ -278,17 +272,17 @@ static void mxs_mmc_bc(struct mxs_mmc_host *host)
cmd0 |= BM_SSP_CMD0_CONT_CLKING_EN | BM_SSP_CMD0_SLOW_CLKING_EN;
}
- host->ssp_pio_words[0] = ctrl0;
- host->ssp_pio_words[1] = cmd0;
- host->ssp_pio_words[2] = cmd1;
- host->dma_dir = DMA_NONE;
- host->slave_dirn = DMA_TRANS_NONE;
+ ssp->ssp_pio_words[0] = ctrl0;
+ ssp->ssp_pio_words[1] = cmd0;
+ ssp->ssp_pio_words[2] = cmd1;
+ ssp->dma_dir = DMA_NONE;
+ ssp->slave_dirn = DMA_TRANS_NONE;
desc = mxs_mmc_prep_dma(host, DMA_CTRL_ACK);
if (!desc)
goto out;
dmaengine_submit(desc);
- dma_async_issue_pending(host->dmach);
+ dma_async_issue_pending(ssp->dmach);
return;
out:
@@ -298,6 +292,7 @@ out:
static void mxs_mmc_ac(struct mxs_mmc_host *host)
{
+ struct mxs_ssp *ssp = &host->ssp;
struct mmc_command *cmd = host->cmd;
struct dma_async_tx_descriptor *desc;
u32 ignore_crc, get_resp, long_resp;
@@ -319,17 +314,17 @@ static void mxs_mmc_ac(struct mxs_mmc_host *host)
cmd0 |= BM_SSP_CMD0_CONT_CLKING_EN | BM_SSP_CMD0_SLOW_CLKING_EN;
}
- host->ssp_pio_words[0] = ctrl0;
- host->ssp_pio_words[1] = cmd0;
- host->ssp_pio_words[2] = cmd1;
- host->dma_dir = DMA_NONE;
- host->slave_dirn = DMA_TRANS_NONE;
+ ssp->ssp_pio_words[0] = ctrl0;
+ ssp->ssp_pio_words[1] = cmd0;
+ ssp->ssp_pio_words[2] = cmd1;
+ ssp->dma_dir = DMA_NONE;
+ ssp->slave_dirn = DMA_TRANS_NONE;
desc = mxs_mmc_prep_dma(host, DMA_CTRL_ACK);
if (!desc)
goto out;
dmaengine_submit(desc);
- dma_async_issue_pending(host->dmach);
+ dma_async_issue_pending(ssp->dmach);
return;
out:
@@ -441,11 +436,11 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host)
writel(val, ssp->base + HW_SSP_TIMING(ssp));
/* pio */
- host->ssp_pio_words[0] = ctrl0;
- host->ssp_pio_words[1] = cmd0;
- host->ssp_pio_words[2] = cmd1;
- host->dma_dir = DMA_NONE;
- host->slave_dirn = DMA_TRANS_NONE;
+ ssp->ssp_pio_words[0] = ctrl0;
+ ssp->ssp_pio_words[1] = cmd0;
+ ssp->ssp_pio_words[2] = cmd1;
+ ssp->dma_dir = DMA_NONE;
+ ssp->slave_dirn = DMA_TRANS_NONE;
desc = mxs_mmc_prep_dma(host, 0);
if (!desc)
goto out;
@@ -453,14 +448,14 @@ static void mxs_mmc_adtc(struct mxs_mmc_host *host)
/* append data sg */
WARN_ON(host->data != NULL);
host->data = data;
- host->dma_dir = dma_data_dir;
- host->slave_dirn = slave_dirn;
+ ssp->dma_dir = dma_data_dir;
+ ssp->slave_dirn = slave_dirn;
desc = mxs_mmc_prep_dma(host, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc)
goto out;
dmaengine_submit(desc);
- dma_async_issue_pending(host->dmach);
+ dma_async_issue_pending(ssp->dmach);
return;
out:
dev_warn(mmc_dev(host->mmc),
@@ -557,14 +552,15 @@ static const struct mmc_host_ops mxs_mmc_ops = {
static bool mxs_mmc_dma_filter(struct dma_chan *chan, void *param)
{
struct mxs_mmc_host *host = param;
+ struct mxs_ssp *ssp = &host->ssp;
if (!mxs_dma_is_apbh(chan))
return false;
- if (chan->chan_id != host->dma_channel)
+ if (chan->chan_id != ssp->dma_channel)
return false;
- chan->private = &host->dma_data;
+ chan->private = &ssp->dma_data;
return true;
}
@@ -632,7 +628,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
* to use generic DMA binding later when the helpers get in.
*/
ret = of_property_read_u32(np, "fsl,ssp-dma-channel",
- &host->dma_channel);
+ &ssp->dma_channel);
if (ret) {
dev_err(mmc_dev(host->mmc),
"failed to get dma channel\n");
@@ -640,7 +636,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
}
} else {
ssp->devid = pdev->id_entry->driver_data;
- host->dma_channel = dmares->start;
+ ssp->dma_channel = dmares->start;
}
host->mmc = mmc;
@@ -673,9 +669,9 @@ static int mxs_mmc_probe(struct platform_device *pdev)
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
- host->dma_data.chan_irq = irq_dma;
- host->dmach = dma_request_channel(mask, mxs_mmc_dma_filter, host);
- if (!host->dmach) {
+ ssp->dma_data.chan_irq = irq_dma;
+ ssp->dmach = dma_request_channel(mask, mxs_mmc_dma_filter, host);
+ if (!ssp->dmach) {
dev_err(mmc_dev(host->mmc),
"%s: failed to request dma\n", __func__);
goto out_clk_put;
@@ -714,7 +710,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
mmc->max_blk_size = 1 << 0xf;
mmc->max_blk_count = (ssp_is_old(ssp)) ? 0xff : 0xffffff;
mmc->max_req_size = (ssp_is_old(ssp)) ? 0xffff : 0xffffffff;
- mmc->max_seg_size = dma_get_max_seg_size(host->dmach->device->dev);
+ mmc->max_seg_size = dma_get_max_seg_size(ssp->dmach->device->dev);
platform_set_drvdata(pdev, mmc);
@@ -734,8 +730,8 @@ static int mxs_mmc_probe(struct platform_device *pdev)
return 0;
out_free_dma:
- if (host->dmach)
- dma_release_channel(host->dmach);
+ if (ssp->dmach)
+ dma_release_channel(ssp->dmach);
out_clk_put:
clk_disable_unprepare(ssp->clk);
clk_put(ssp->clk);
@@ -754,8 +750,8 @@ static int mxs_mmc_remove(struct platform_device *pdev)
platform_set_drvdata(pdev, NULL);
- if (host->dmach)
- dma_release_channel(host->dmach);
+ if (ssp->dmach)
+ dma_release_channel(ssp->dmach);
clk_disable_unprepare(ssp->clk);
clk_put(ssp->clk);
diff --git a/drivers/spi/spi-mxs.c b/drivers/spi/spi-mxs.c
index 7bf826f5af59..0f28afb80310 100644
--- a/drivers/spi/spi-mxs.c
+++ b/drivers/spi/spi-mxs.c
@@ -46,7 +46,6 @@
#include <linux/gpio.h>
#include <linux/regulator/consumer.h>
#include <linux/module.h>
-#include <linux/fsl/mxs-dma.h>
#include <linux/pinctrl/consumer.h>
#include <linux/stmp_device.h>
#include <linux/spi/spi.h>
diff --git a/include/linux/spi/mxs-spi.h b/include/linux/spi/mxs-spi.h
index d07f8dc7fdd9..61ae1306db23 100644
--- a/include/linux/spi/mxs-spi.h
+++ b/include/linux/spi/mxs-spi.h
@@ -24,6 +24,8 @@
#ifndef __LINUX_SPI_MXS_SPI_H__
#define __LINUX_SPI_MXS_SPI_H__
+#include <linux/fsl/mxs-dma.h>
+
#define ssp_is_old(host) ((host)->devid == IMX23_SSP)
/* SSP registers */
@@ -134,6 +136,13 @@ struct mxs_ssp {
struct clk *clk;
unsigned int clk_rate;
enum mxs_ssp_id devid;
+
+ int dma_channel;
+ struct dma_chan *dmach;
+ struct mxs_dma_data dma_data;
+ unsigned int dma_dir;
+ enum dma_transfer_direction slave_dirn;
+ u32 ssp_pio_words[SSP_PIO_NUM];
};
void mxs_ssp_set_clk_rate(struct mxs_ssp *ssp, unsigned int rate);