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authorSerge Semin <Sergey.Semin@baikalelectronics.ru>2020-05-29 16:12:02 +0300
committerMark Brown <broonie@kernel.org>2020-05-29 15:55:52 +0100
commit57784411728ff4d72ae051fdbba1e54fcb1f8d6f (patch)
tree8272a1c20ae15ce167ae6513b179bda1648bc745 /drivers/spi/spi-dw-dma.c
parentecb3a67edfd353837dc23b538fb250d1dfd88e7b (diff)
spi: dw: Cleanup generic DW DMA code namings
Since from now the former Intel MID platform layer is used as a generic DW SPI DMA module, let's alter the internal methods naming to be DMA-related instead of having the "mid_" prefix. Co-developed-by: Georgy Vlasov <Georgy.Vlasov@baikalelectronics.ru> Co-developed-by: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru> Signed-off-by: Georgy Vlasov <Georgy.Vlasov@baikalelectronics.ru> Signed-off-by: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru> Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Feng Tang <feng.tang@intel.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: linux-mips@vger.kernel.org Cc: devicetree@vger.kernel.org Link: https://lore.kernel.org/r/20200529131205.31838-14-Sergey.Semin@baikalelectronics.ru Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-dw-dma.c')
-rw-r--r--drivers/spi/spi-dw-dma.c85
1 files changed, 43 insertions, 42 deletions
diff --git a/drivers/spi/spi-dw-dma.c b/drivers/spi/spi-dw-dma.c
index 7ae31682b5de..1b96cec6d8cd 100644
--- a/drivers/spi/spi-dw-dma.c
+++ b/drivers/spi/spi-dw-dma.c
@@ -23,7 +23,7 @@
#define TX_BUSY 1
#define TX_BURST_LEVEL 16
-static bool mid_spi_dma_chan_filter(struct dma_chan *chan, void *param)
+static bool dw_spi_dma_chan_filter(struct dma_chan *chan, void *param)
{
struct dw_dma_slave *s = param;
@@ -34,7 +34,7 @@ static bool mid_spi_dma_chan_filter(struct dma_chan *chan, void *param)
return true;
}
-static void mid_spi_maxburst_init(struct dw_spi *dws)
+static void dw_spi_dma_maxburst_init(struct dw_spi *dws)
{
struct dma_slave_caps caps;
u32 max_burst, def_burst;
@@ -59,7 +59,7 @@ static void mid_spi_maxburst_init(struct dw_spi *dws)
dws->txburst = min(max_burst, def_burst);
}
-static int mid_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws)
+static int dw_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws)
{
struct dw_dma_slave slave = {
.src_id = 0,
@@ -81,13 +81,13 @@ static int mid_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws)
/* 1. Init rx channel */
slave.dma_dev = &dma_dev->dev;
- dws->rxchan = dma_request_channel(mask, mid_spi_dma_chan_filter, &slave);
+ dws->rxchan = dma_request_channel(mask, dw_spi_dma_chan_filter, &slave);
if (!dws->rxchan)
goto err_exit;
/* 2. Init tx channel */
slave.dst_id = 1;
- dws->txchan = dma_request_channel(mask, mid_spi_dma_chan_filter, &slave);
+ dws->txchan = dma_request_channel(mask, dw_spi_dma_chan_filter, &slave);
if (!dws->txchan)
goto free_rxchan;
@@ -96,7 +96,7 @@ static int mid_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws)
init_completion(&dws->dma_completion);
- mid_spi_maxburst_init(dws);
+ dw_spi_dma_maxburst_init(dws);
return 0;
@@ -107,7 +107,7 @@ err_exit:
return -EBUSY;
}
-static int mid_spi_dma_init_generic(struct device *dev, struct dw_spi *dws)
+static int dw_spi_dma_init_generic(struct device *dev, struct dw_spi *dws)
{
dws->rxchan = dma_request_slave_channel(dev, "rx");
if (!dws->rxchan)
@@ -125,12 +125,12 @@ static int mid_spi_dma_init_generic(struct device *dev, struct dw_spi *dws)
init_completion(&dws->dma_completion);
- mid_spi_maxburst_init(dws);
+ dw_spi_dma_maxburst_init(dws);
return 0;
}
-static void mid_spi_dma_exit(struct dw_spi *dws)
+static void dw_spi_dma_exit(struct dw_spi *dws)
{
if (dws->txchan) {
dmaengine_terminate_sync(dws->txchan);
@@ -145,7 +145,7 @@ static void mid_spi_dma_exit(struct dw_spi *dws)
dw_writel(dws, DW_SPI_DMACR, 0);
}
-static irqreturn_t dma_transfer(struct dw_spi *dws)
+static irqreturn_t dw_spi_dma_transfer_handler(struct dw_spi *dws)
{
u16 irq_status = dw_readl(dws, DW_SPI_ISR);
@@ -161,15 +161,16 @@ static irqreturn_t dma_transfer(struct dw_spi *dws)
return IRQ_HANDLED;
}
-static bool mid_spi_can_dma(struct spi_controller *master,
- struct spi_device *spi, struct spi_transfer *xfer)
+static bool dw_spi_can_dma(struct spi_controller *master,
+ struct spi_device *spi, struct spi_transfer *xfer)
{
struct dw_spi *dws = spi_controller_get_devdata(master);
return xfer->len > dws->fifo_len;
}
-static enum dma_slave_buswidth convert_dma_width(u8 n_bytes) {
+static enum dma_slave_buswidth dw_spi_dma_convert_width(u8 n_bytes)
+{
if (n_bytes == 1)
return DMA_SLAVE_BUSWIDTH_1_BYTE;
else if (n_bytes == 2)
@@ -244,8 +245,8 @@ static void dw_spi_dma_tx_done(void *arg)
complete(&dws->dma_completion);
}
-static struct dma_async_tx_descriptor *dw_spi_dma_prepare_tx(struct dw_spi *dws,
- struct spi_transfer *xfer)
+static struct dma_async_tx_descriptor *
+dw_spi_dma_prepare_tx(struct dw_spi *dws, struct spi_transfer *xfer)
{
struct dma_slave_config txconf;
struct dma_async_tx_descriptor *txdesc;
@@ -258,7 +259,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_tx(struct dw_spi *dws,
txconf.dst_addr = dws->dma_addr;
txconf.dst_maxburst = dws->txburst;
txconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
- txconf.dst_addr_width = convert_dma_width(dws->n_bytes);
+ txconf.dst_addr_width = dw_spi_dma_convert_width(dws->n_bytes);
txconf.device_fc = false;
dmaengine_slave_config(dws->txchan, &txconf);
@@ -350,7 +351,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_rx(struct dw_spi *dws,
rxconf.src_addr = dws->dma_addr;
rxconf.src_maxburst = dws->rxburst;
rxconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
- rxconf.src_addr_width = convert_dma_width(dws->n_bytes);
+ rxconf.src_addr_width = dw_spi_dma_convert_width(dws->n_bytes);
rxconf.device_fc = false;
dmaengine_slave_config(dws->rxchan, &rxconf);
@@ -369,7 +370,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_rx(struct dw_spi *dws,
return rxdesc;
}
-static int mid_spi_dma_setup(struct dw_spi *dws, struct spi_transfer *xfer)
+static int dw_spi_dma_setup(struct dw_spi *dws, struct spi_transfer *xfer)
{
u16 imr = 0, dma_ctrl = 0;
@@ -391,12 +392,12 @@ static int mid_spi_dma_setup(struct dw_spi *dws, struct spi_transfer *xfer)
reinit_completion(&dws->dma_completion);
- dws->transfer_handler = dma_transfer;
+ dws->transfer_handler = dw_spi_dma_transfer_handler;
return 0;
}
-static int mid_spi_dma_transfer(struct dw_spi *dws, struct spi_transfer *xfer)
+static int dw_spi_dma_transfer(struct dw_spi *dws, struct spi_transfer *xfer)
{
struct dma_async_tx_descriptor *txdesc, *rxdesc;
int ret;
@@ -436,7 +437,7 @@ static int mid_spi_dma_transfer(struct dw_spi *dws, struct spi_transfer *xfer)
return ret;
}
-static void mid_spi_dma_stop(struct dw_spi *dws)
+static void dw_spi_dma_stop(struct dw_spi *dws)
{
if (test_bit(TX_BUSY, &dws->dma_chan_busy)) {
dmaengine_terminate_sync(dws->txchan);
@@ -450,32 +451,32 @@ static void mid_spi_dma_stop(struct dw_spi *dws)
dw_writel(dws, DW_SPI_DMACR, 0);
}
-static const struct dw_spi_dma_ops mfld_dma_ops = {
- .dma_init = mid_spi_dma_init_mfld,
- .dma_exit = mid_spi_dma_exit,
- .dma_setup = mid_spi_dma_setup,
- .can_dma = mid_spi_can_dma,
- .dma_transfer = mid_spi_dma_transfer,
- .dma_stop = mid_spi_dma_stop,
+static const struct dw_spi_dma_ops dw_spi_dma_mfld_ops = {
+ .dma_init = dw_spi_dma_init_mfld,
+ .dma_exit = dw_spi_dma_exit,
+ .dma_setup = dw_spi_dma_setup,
+ .can_dma = dw_spi_can_dma,
+ .dma_transfer = dw_spi_dma_transfer,
+ .dma_stop = dw_spi_dma_stop,
};
-void dw_spi_mid_setup_dma_mfld(struct dw_spi *dws)
+void dw_spi_dma_setup_mfld(struct dw_spi *dws)
{
- dws->dma_ops = &mfld_dma_ops;
+ dws->dma_ops = &dw_spi_dma_mfld_ops;
}
-EXPORT_SYMBOL_GPL(dw_spi_mid_setup_dma_mfld);
-
-static const struct dw_spi_dma_ops generic_dma_ops = {
- .dma_init = mid_spi_dma_init_generic,
- .dma_exit = mid_spi_dma_exit,
- .dma_setup = mid_spi_dma_setup,
- .can_dma = mid_spi_can_dma,
- .dma_transfer = mid_spi_dma_transfer,
- .dma_stop = mid_spi_dma_stop,
+EXPORT_SYMBOL_GPL(dw_spi_dma_setup_mfld);
+
+static const struct dw_spi_dma_ops dw_spi_dma_generic_ops = {
+ .dma_init = dw_spi_dma_init_generic,
+ .dma_exit = dw_spi_dma_exit,
+ .dma_setup = dw_spi_dma_setup,
+ .can_dma = dw_spi_can_dma,
+ .dma_transfer = dw_spi_dma_transfer,
+ .dma_stop = dw_spi_dma_stop,
};
-void dw_spi_mid_setup_dma_generic(struct dw_spi *dws)
+void dw_spi_dma_setup_generic(struct dw_spi *dws)
{
- dws->dma_ops = &generic_dma_ops;
+ dws->dma_ops = &dw_spi_dma_generic_ops;
}
-EXPORT_SYMBOL_GPL(dw_spi_mid_setup_dma_generic);
+EXPORT_SYMBOL_GPL(dw_spi_dma_setup_generic);