intel_mid_dma seems to be unmaintained for a long time. Moreover, the IP block
of DMA itself is the same in both dw_dmac and intel_mid_dma. This patch moves
spi-dw-midpci to use dw_dmac driver.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
drivers/spi/Kconfig | 2 +-
drivers/spi/spi-dw-mid.c | 43 +++++++++++++++++++------------------------
drivers/spi/spi-dw.h | 5 +++--
3 files changed, 23 insertions(+), 27 deletions(-)
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index dc10453..d1b0a33 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -601,7 +601,7 @@ config SPI_DW_PCI
config SPI_DW_MID_DMA
bool "DMA support for DW SPI controller on Intel MID platform"
- depends on SPI_DW_PCI && INTEL_MID_DMAC
+ depends on SPI_DW_PCI && DW_DMAC_PCI
config SPI_DW_MMIO
tristate "Memory-mapped io interface driver for DW SPI core"
diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c
index fad7425..5b1d54e 100644
--- a/drivers/spi/spi-dw-mid.c
+++ b/drivers/spi/spi-dw-mid.c
@@ -23,26 +23,28 @@
#include "spi-dw.h"
#ifdef CONFIG_SPI_DW_MID_DMA
-#include <linux/intel_mid_dma.h>
#include <linux/pci.h>
+#include <linux/platform_data/dma-dw.h>
-struct mid_dma {
- struct intel_mid_dma_slave dmas_tx;
- struct intel_mid_dma_slave dmas_rx;
-};
+static struct dw_dma_slave mid_dma_tx = { .dst_id = 1 };
+static struct dw_dma_slave mid_dma_rx = { .src_id = 0 };
static bool mid_spi_dma_chan_filter(struct dma_chan *chan, void *param)
{
- struct dw_spi *dws = param;
+ struct dw_dma_slave *dws = param;
+
+ if (dws->dma_dev != chan->device->dev)
+ return false;
- return dws->dma_dev == chan->device->dev;
+ chan->private = dws;
+ return true;
}
static int mid_spi_dma_init(struct dw_spi *dws)
{
- struct mid_dma *dw_dma = dws->dma_priv;
struct pci_dev *dma_dev;
- struct intel_mid_dma_slave *rxs, *txs;
+ struct dw_dma_slave *tx = dws->dma_tx;
+ struct dw_dma_slave *rx = dws->dma_rx;
dma_cap_mask_t mask;
/*
@@ -59,23 +61,17 @@ static int mid_spi_dma_init(struct dw_spi *dws)
dma_cap_set(DMA_SLAVE, mask);
/* 1. Init rx channel */
- dws->rxchan = dma_request_channel(mask, mid_spi_dma_chan_filter, dws);
+ rx->dma_dev = dws->dma_dev;
+ dws->rxchan = dma_request_channel(mask, mid_spi_dma_chan_filter, rx);
if (!dws->rxchan)
goto err_exit;
- rxs = &dw_dma->dmas_rx;
- rxs->hs_mode = LNW_DMA_HW_HS;
- rxs->cfg_mode = LNW_DMA_PER_TO_MEM;
- dws->rxchan->private = rxs;
dws->master->dma_rx = dws->rxchan;
/* 2. Init tx channel */
- dws->txchan = dma_request_channel(mask, mid_spi_dma_chan_filter, dws);
+ tx->dma_dev = dws->dma_dev;
+ dws->txchan = dma_request_channel(mask, mid_spi_dma_chan_filter, tx);
if (!dws->txchan)
goto free_rxchan;
- txs = &dw_dma->dmas_tx;
- txs->hs_mode = LNW_DMA_HW_HS;
- txs->cfg_mode = LNW_DMA_MEM_TO_PER;
- dws->txchan->private = txs;
dws->master->dma_tx = dws->txchan;
dws->dma_inited = 1;
@@ -150,7 +146,7 @@ static int mid_spi_dma_transfer(struct dw_spi *dws, int cs_change)
/* 2. Prepare the TX dma transfer */
txconf.direction = DMA_MEM_TO_DEV;
txconf.dst_addr = dws->dma_addr;
- txconf.dst_maxburst = LNW_DMA_MSIZE_16;
+ txconf.dst_maxburst = 16;
txconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
txconf.dst_addr_width = dws->dma_width;
txconf.device_fc = false;
@@ -169,7 +165,7 @@ static int mid_spi_dma_transfer(struct dw_spi *dws, int cs_change)
/* 3. Prepare the RX dma transfer */
rxconf.direction = DMA_DEV_TO_MEM;
rxconf.src_addr = dws->dma_addr;
- rxconf.src_maxburst = LNW_DMA_MSIZE_16;
+ rxconf.src_maxburst = 16;
rxconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
rxconf.src_addr_width = dws->dma_width;
rxconf.device_fc = false;
@@ -232,9 +228,8 @@ int dw_spi_mid_init(struct dw_spi *dws)
dws->fifo_len = 40; /* FIFO has 40 words buffer */
#ifdef CONFIG_SPI_DW_MID_DMA
- dws->dma_priv = kzalloc(sizeof(struct mid_dma), GFP_KERNEL);
- if (!dws->dma_priv)
- return -ENOMEM;
+ dws->dma_tx = &mid_dma_tx;
+ dws->dma_rx = &mid_dma_rx;
dws->dma_ops = &mid_dma_ops;
#endif
return 0;
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h
index 436678f4..5d3f0d5 100644
--- a/drivers/spi/spi-dw.h
+++ b/drivers/spi/spi-dw.h
@@ -133,7 +133,7 @@ struct dw_spi {
irqreturn_t (*transfer_handler)(struct dw_spi *dws);
void (*cs_control)(u32 command);
- /* Dma info */
+ /* DMA info */
int dma_inited;
struct dma_chan *txchan;
struct dma_chan *rxchan;
@@ -141,7 +141,8 @@ struct dw_spi {
struct device *dma_dev;
dma_addr_t dma_addr; /* phy address of the Data register */
struct dw_spi_dma_ops *dma_ops;
- void *dma_priv; /* platform relate info */
+ void *dma_tx;
+ void *dma_rx;
/* Bus interface info */
void *priv;
--
2.1.0
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