@@ -665,7 +665,7 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
u8 m_master = dwc->m_master;
unsigned int src_width;
unsigned int dst_width;
- unsigned int data_width = dw->data_width[m_master];
+ unsigned int data_width = dw->pdata->data_width[m_master];
u32 ctllo;
u8 lms = DWC_LLP_LMS(m_master);
@@ -745,7 +745,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
dma_addr_t reg;
unsigned int reg_width;
unsigned int mem_width;
- unsigned int data_width = dw->data_width[m_master];
+ unsigned int data_width = dw->pdata->data_width[m_master];
unsigned int i;
struct scatterlist *sg;
size_t total_len = 0;
@@ -1444,7 +1444,6 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
struct dw_dma *dw;
bool autocfg = false;
unsigned int dw_params;
- unsigned int max_blk_size = 0;
unsigned int i;
int err;
@@ -1452,6 +1451,10 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
if (!dw)
return -ENOMEM;
+ dw->pdata = devm_kzalloc(chip->dev, sizeof(*dw->pdata), GFP_KERNEL);
+ if (!dw->pdata)
+ return -ENOMEM;
+
dw->regs = chip->regs;
chip->dw = dw;
@@ -1467,11 +1470,8 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
goto err_pdata;
}
- pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
- if (!pdata) {
- err = -ENOMEM;
- goto err_pdata;
- }
+ /* Reassign the platform data pointer */
+ pdata = dw->pdata;
/* Get hardware configuration parameters */
pdata->nr_channels = (dw_params >> DW_PARAMS_NR_CHAN & 7) + 1;
@@ -1480,7 +1480,7 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
pdata->data_width[i] =
4 << (dw_params >> DW_PARAMS_DATA_WIDTH(i) & 3);
}
- max_blk_size = dma_readl(dw, MAX_BLK_SIZE);
+ pdata->block_size = dma_readl(dw, MAX_BLK_SIZE);
/* Fill platform data with the default values */
pdata->is_private = true;
@@ -1490,6 +1490,11 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
} else if (pdata->nr_channels > DW_DMA_MAX_NR_CHANNELS) {
err = -EINVAL;
goto err_pdata;
+ } else {
+ memcpy(dw->pdata, pdata, sizeof(*dw->pdata));
+
+ /* Reassign the platform data pointer */
+ pdata = dw->pdata;
}
dw->chan = devm_kcalloc(chip->dev, pdata->nr_channels, sizeof(*dw->chan),
@@ -1499,11 +1504,6 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
goto err_pdata;
}
- /* Get hardware configuration parameters */
- dw->nr_masters = pdata->nr_masters;
- for (i = 0; i < dw->nr_masters; i++)
- dw->data_width[i] = pdata->data_width[i];
-
/* Calculate all channel mask before DMA setup */
dw->all_chan_mask = (1 << pdata->nr_channels) - 1;
@@ -1570,7 +1570,7 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct dw_dma_platform_data *pdata)
* up to 0x0a for 4095.
*/
dwc->block_size =
- (4 << ((max_blk_size >> 4 * i) & 0xf)) - 1;
+ (4 << ((pdata->block_size >> 4 * i) & 0xf)) - 1;
dwc->nollp =
(dwc_params >> DWC_PARAMS_MBLK_EN & 0x1) == 0;
} else {
@@ -47,8 +47,8 @@ static struct dma_chan *dw_dma_of_xlate(struct of_phandle_args *dma_spec,
if (WARN_ON(slave.src_id >= DW_DMA_MAX_NR_REQUESTS ||
slave.dst_id >= DW_DMA_MAX_NR_REQUESTS ||
- slave.m_master >= dw->nr_masters ||
- slave.p_master >= dw->nr_masters))
+ slave.m_master >= dw->pdata->nr_masters ||
+ slave.p_master >= dw->pdata->nr_masters))
return NULL;
dma_cap_zero(cap);
@@ -281,9 +281,8 @@ struct dw_dma {
u8 all_chan_mask;
u8 in_use;
- /* hardware configuration */
- unsigned char nr_masters;
- unsigned char data_width[DW_DMA_MAX_NR_MASTERS];
+ /* platform data */
+ struct dw_dma_platform_data *pdata;
};
static inline struct dw_dma_regs __iomem *__dw_regs(struct dw_dma *dw)
@@ -55,7 +55,7 @@ struct dw_dma_platform_data {
#define CHAN_PRIORITY_ASCENDING 0 /* chan0 highest */
#define CHAN_PRIORITY_DESCENDING 1 /* chan7 highest */
unsigned char chan_priority;
- unsigned short block_size;
+ unsigned int block_size;
unsigned char nr_masters;
unsigned char data_width[DW_DMA_MAX_NR_MASTERS];
};
Keep the entire platform data in the struct dw_dma. It makes the driver a bit cleaner. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- drivers/dma/dw/core.c | 30 +++++++++++++++--------------- drivers/dma/dw/platform.c | 4 ++-- drivers/dma/dw/regs.h | 5 ++--- include/linux/platform_data/dma-dw.h | 2 +- 4 files changed, 20 insertions(+), 21 deletions(-)