[PATCH 4/6] dmaengine: sun6i: Add a quirk for setting mode fields

Jernej Skrabec
2019-03-07T16:58:27Z

H6 DMA has mode fields in different position than any other currently
supported DMA controller.

Add a quirk for that.

Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
---
drivers/dma/sun6i-dma.c | 46 ++++++++++++++++++++++++-----------------
1 file changed, 27 insertions(+), 19 deletions(-)

diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index 9dd23b76d841..6a37f8bb39b1 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -70,15 +70,13 @@
#define DMA_CHAN_CUR_CFG 0x0c
#define DMA_CHAN_MAX_DRQ_A31 0x1f
#define DMA_CHAN_CFG_SRC_DRQ_A31(x) ((x) & DMA_CHAN_MAX_DRQ_A31)
-#define DMA_CHAN_CFG_SRC_IO_MODE BIT(5)
-#define DMA_CHAN_CFG_SRC_LINEAR_MODE (0 << 5)
+#define DMA_CHAN_CFG_SRC_MODE_A31(x) (((x) & 0x1) << 5)
#define DMA_CHAN_CFG_SRC_BURST_A31(x) (((x) & 0x3) << 7)
#define DMA_CHAN_CFG_SRC_BURST_H3(x) (((x) & 0x3) << 6)
#define DMA_CHAN_CFG_SRC_WIDTH(x) (((x) & 0x3) << 9)

#define DMA_CHAN_CFG_DST_DRQ_A31(x) (DMA_CHAN_CFG_SRC_DRQ_A31(x) << 16)
-#define DMA_CHAN_CFG_DST_IO_MODE (DMA_CHAN_CFG_SRC_IO_MODE << 16)
-#define DMA_CHAN_CFG_DST_LINEAR_MODE (DMA_CHAN_CFG_SRC_LINEAR_MODE << 16)
+#define DMA_CHAN_CFG_DST_MODE_A31(x) (DMA_CHAN_CFG_SRC_MODE_A31(x) << 16)
#define DMA_CHAN_CFG_DST_BURST_A31(x) (DMA_CHAN_CFG_SRC_BURST_A31(x) << 16)
#define DMA_CHAN_CFG_DST_BURST_H3(x) (DMA_CHAN_CFG_SRC_BURST_H3(x) << 16)
#define DMA_CHAN_CFG_DST_WIDTH(x) (DMA_CHAN_CFG_SRC_WIDTH(x) << 16)
@@ -98,6 +96,8 @@
#define LLI_LAST_ITEM 0xfffff800
#define NORMAL_WAIT 8
#define DRQ_SDRAM 1
+#define LINEAR_MODE 0
+#define IO_MODE 1

/* forward declaration */
struct sun6i_dma_dev;
@@ -126,6 +126,7 @@ struct sun6i_dma_config {
void (*clock_autogate_enable)(struct sun6i_dma_dev *);
void (*set_burst_length)(u32 *p_cfg, s8 src_burst, s8 dst_burst);
void (*set_drq)(u32 *p_cfg, s8 src_drq, s8 dst_drq);
+ void (*set_mode)(u32 *p_cfg, s8 src_mode, s8 dst_mode);
u32 src_burst_lengths;
u32 dst_burst_lengths;
u32 src_addr_widths;
@@ -318,6 +319,12 @@ static void sun6i_set_drq_a31(u32 *p_cfg, s8 src_drq, s8 dst_drq)
DMA_CHAN_CFG_DST_DRQ_A31(dst_drq);
}

+static void sun6i_set_mode_a31(u32 *p_cfg, s8 src_mode, s8 dst_mode)
+{
+ *p_cfg |= DMA_CHAN_CFG_SRC_MODE_A31(src_mode) |
+ DMA_CHAN_CFG_DST_MODE_A31(dst_mode);
+}
+
static size_t sun6i_get_chan_size(struct sun6i_pchan *pchan)
{
struct sun6i_desc *txd = pchan->desc;
@@ -641,13 +648,12 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_dma_memcpy(

burst = convert_burst(8);
width = convert_buswidth(DMA_SLAVE_BUSWIDTH_4_BYTES);
- v_lli->cfg = DMA_CHAN_CFG_DST_LINEAR_MODE |
- DMA_CHAN_CFG_SRC_LINEAR_MODE |
- DMA_CHAN_CFG_SRC_WIDTH(width) |
+ v_lli->cfg = DMA_CHAN_CFG_SRC_WIDTH(width) |
DMA_CHAN_CFG_DST_WIDTH(width);

sdev->cfg->set_burst_length(&v_lli->cfg, burst, burst);
sdev->cfg->set_drq(&v_lli->cfg, DRQ_SDRAM, DRQ_SDRAM);
+ sdev->cfg->set_mode(&v_lli->cfg, LINEAR_MODE, LINEAR_MODE);

sun6i_dma_lli_add(NULL, v_lli, p_lli, txd);

@@ -699,10 +705,9 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_slave_sg(
if (dir == DMA_MEM_TO_DEV) {
v_lli->src = sg_dma_address(sg);
v_lli->dst = sconfig->dst_addr;
- v_lli->cfg = lli_cfg |
- DMA_CHAN_CFG_DST_IO_MODE |
- DMA_CHAN_CFG_SRC_LINEAR_MODE;
+ v_lli->cfg = lli_cfg;
sdev->cfg->set_drq(&v_lli->cfg, DRQ_SDRAM, vchan->port);
+ sdev->cfg->set_mode(&v_lli->cfg, LINEAR_MODE, IO_MODE);

dev_dbg(chan2dev(chan),
"%s; chan: %d, dest: %pad, src: %pad, len: %u. flags: 0x%08lx\n",
@@ -713,10 +718,9 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_slave_sg(
} else {
v_lli->src = sconfig->src_addr;
v_lli->dst = sg_dma_address(sg);
- v_lli->cfg = lli_cfg |
- DMA_CHAN_CFG_DST_LINEAR_MODE |
- DMA_CHAN_CFG_SRC_IO_MODE;
+ v_lli->cfg = lli_cfg;
sdev->cfg->set_drq(&v_lli->cfg, vchan->port, DRQ_SDRAM);
+ sdev->cfg->set_mode(&v_lli->cfg, IO_MODE, LINEAR_MODE);

dev_dbg(chan2dev(chan),
"%s; chan: %d, dest: %pad, src: %pad, len: %u. flags: 0x%08lx\n",
@@ -782,17 +786,15 @@ static struct dma_async_tx_descriptor *sun6i_dma_prep_dma_cyclic(
if (dir == DMA_MEM_TO_DEV) {
v_lli->src = buf_addr + period_len * i;
v_lli->dst = sconfig->dst_addr;
- v_lli->cfg = lli_cfg |
- DMA_CHAN_CFG_DST_IO_MODE |
- DMA_CHAN_CFG_SRC_LINEAR_MODE;
+ v_lli->cfg = lli_cfg;
sdev->cfg->set_drq(&v_lli->cfg, DRQ_SDRAM, vchan->port);
+ sdev->cfg->set_mode(&v_lli->cfg, LINEAR_MODE, IO_MODE);
} else {
v_lli->src = sconfig->src_addr;
v_lli->dst = buf_addr + period_len * i;
- v_lli->cfg = lli_cfg |
- DMA_CHAN_CFG_DST_LINEAR_MODE |
- DMA_CHAN_CFG_SRC_IO_MODE;
+ v_lli->cfg = lli_cfg;
sdev->cfg->set_drq(&v_lli->cfg, vchan->port, DRQ_SDRAM);
+ sdev->cfg->set_mode(&v_lli->cfg, IO_MODE, LINEAR_MODE);
}

prev = sun6i_dma_lli_add(prev, v_lli, p_lli, txd);
@@ -1058,6 +1060,7 @@ static struct sun6i_dma_config sun6i_a31_dma_cfg = {
.nr_max_vchans = 53,
.set_burst_length = sun6i_set_burst_length_a31,
.set_drq = sun6i_set_drq_a31,
+ .set_mode = sun6i_set_mode_a31,
.src_burst_lengths = BIT(1) | BIT(8),
.dst_burst_lengths = BIT(1) | BIT(8),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1080,6 +1083,7 @@ static struct sun6i_dma_config sun8i_a23_dma_cfg = {
.clock_autogate_enable = sun6i_enable_clock_autogate_a23,
.set_burst_length = sun6i_set_burst_length_a31,
.set_drq = sun6i_set_drq_a31,
+ .set_mode = sun6i_set_mode_a31,
.src_burst_lengths = BIT(1) | BIT(8),
.dst_burst_lengths = BIT(1) | BIT(8),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1097,6 +1101,7 @@ static struct sun6i_dma_config sun8i_a83t_dma_cfg = {
.clock_autogate_enable = sun6i_enable_clock_autogate_a23,
.set_burst_length = sun6i_set_burst_length_a31,
.set_drq = sun6i_set_drq_a31,
+ .set_mode = sun6i_set_mode_a31,
.src_burst_lengths = BIT(1) | BIT(8),
.dst_burst_lengths = BIT(1) | BIT(8),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1121,6 +1126,7 @@ static struct sun6i_dma_config sun8i_h3_dma_cfg = {
.clock_autogate_enable = sun6i_enable_clock_autogate_h3,
.set_burst_length = sun6i_set_burst_length_h3,
.set_drq = sun6i_set_drq_a31,
+ .set_mode = sun6i_set_mode_a31,
.src_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
.dst_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1141,6 +1147,7 @@ static struct sun6i_dma_config sun50i_a64_dma_cfg = {
.clock_autogate_enable = sun6i_enable_clock_autogate_h3,
.set_burst_length = sun6i_set_burst_length_h3,
.set_drq = sun6i_set_drq_a31,
+ .set_mode = sun6i_set_mode_a31,
.src_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
.dst_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
@@ -1165,6 +1172,7 @@ static struct sun6i_dma_config sun8i_v3s_dma_cfg = {
.clock_autogate_enable = sun6i_enable_clock_autogate_a23,
.set_burst_length = sun6i_set_burst_length_a31,
.set_drq = sun6i_set_drq_a31,
+ .set_mode = sun6i_set_mode_a31,
.src_burst_lengths = BIT(1) | BIT(8),
.dst_burst_lengths = BIT(1) | BIT(8),
.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
--
2.21.0