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path: root/drivers/spi/spi-dw-core.c
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Diffstat (limited to 'drivers/spi/spi-dw-core.c')
-rw-r--r--drivers/spi/spi-dw-core.c40
1 files changed, 16 insertions, 24 deletions
diff --git a/drivers/spi/spi-dw-core.c b/drivers/spi/spi-dw-core.c
index 55afdcee7d2b..d8e92f53e2bc 100644
--- a/drivers/spi/spi-dw-core.c
+++ b/drivers/spi/spi-dw-core.c
@@ -23,7 +23,6 @@
/* Slave spi_dev related */
struct chip_data {
u8 tmode; /* TR/TO/RO/EEPROM */
- u8 type; /* SPI/SSP/MicroWire */
u16 clk_div; /* baud rate divider */
u32 speed_hz; /* baud rate */
@@ -105,7 +104,7 @@ void dw_spi_set_cs(struct spi_device *spi, bool enable)
*/
if (cs_high == enable)
dw_writel(dws, DW_SPI_SER, BIT(spi->chip_select));
- else if (dws->cs_override)
+ else if (dws->caps & DW_SPI_CAP_CS_OVERRIDE)
dw_writel(dws, DW_SPI_SER, 0);
}
EXPORT_SYMBOL_GPL(dw_spi_set_cs);
@@ -142,11 +141,9 @@ static inline u32 rx_max(struct dw_spi *dws)
static void dw_writer(struct dw_spi *dws)
{
- u32 max;
+ u32 max = tx_max(dws);
u16 txw = 0;
- spin_lock(&dws->buf_lock);
- max = tx_max(dws);
while (max--) {
/* Set the tx word if the transfer's original "tx" is not null */
if (dws->tx_end - dws->len) {
@@ -158,16 +155,13 @@ static void dw_writer(struct dw_spi *dws)
dw_write_io_reg(dws, DW_SPI_DR, txw);
dws->tx += dws->n_bytes;
}
- spin_unlock(&dws->buf_lock);
}
static void dw_reader(struct dw_spi *dws)
{
- u32 max;
+ u32 max = rx_max(dws);
u16 rxw;
- spin_lock(&dws->buf_lock);
- max = rx_max(dws);
while (max--) {
rxw = dw_read_io_reg(dws, DW_SPI_DR);
/* Care rx only if the transfer's original "rx" is not null */
@@ -179,7 +173,6 @@ static void dw_reader(struct dw_spi *dws)
}
dws->rx += dws->n_bytes;
}
- spin_unlock(&dws->buf_lock);
}
static void int_error_stop(struct dw_spi *dws, const char *msg)
@@ -204,7 +197,7 @@ static irqreturn_t interrupt_transfer(struct dw_spi *dws)
dw_reader(dws);
if (dws->rx_end == dws->rx) {
- spi_mask_intr(dws, SPI_INT_TXEI);
+ spi_mask_intr(dws, 0xff);
spi_finalize_current_transfer(dws->master);
return IRQ_HANDLED;
}
@@ -228,7 +221,7 @@ static irqreturn_t dw_spi_irq(int irq, void *dev_id)
return IRQ_NONE;
if (!master->cur_msg) {
- spi_mask_intr(dws, SPI_INT_TXEI);
+ spi_mask_intr(dws, 0xff);
return IRQ_HANDLED;
}
@@ -244,7 +237,7 @@ u32 dw_spi_update_cr0(struct spi_controller *master, struct spi_device *spi,
/* Default SPI mode is SCPOL = 0, SCPH = 0 */
cr0 = (transfer->bits_per_word - 1)
- | (chip->type << SPI_FRF_OFFSET)
+ | (SSI_MOTO_SPI << SPI_FRF_OFFSET)
| ((((spi->mode & SPI_CPOL) ? 1 : 0) << SPI_SCOL_OFFSET) |
(((spi->mode & SPI_CPHA) ? 1 : 0) << SPI_SCPH_OFFSET) |
(((spi->mode & SPI_LOOP) ? 1 : 0) << SPI_SRL_OFFSET))
@@ -259,6 +252,7 @@ u32 dw_spi_update_cr0_v1_01a(struct spi_controller *master,
struct spi_device *spi,
struct spi_transfer *transfer)
{
+ struct dw_spi *dws = spi_controller_get_devdata(master);
struct chip_data *chip = spi_get_ctldata(spi);
u32 cr0;
@@ -266,7 +260,7 @@ u32 dw_spi_update_cr0_v1_01a(struct spi_controller *master,
cr0 = (transfer->bits_per_word - 1);
/* CTRLR0[ 7: 6] Frame Format */
- cr0 |= chip->type << DWC_SSI_CTRLR0_FRF_OFFSET;
+ cr0 |= SSI_MOTO_SPI << DWC_SSI_CTRLR0_FRF_OFFSET;
/*
* SPI mode (SCPOL|SCPH)
@@ -282,6 +276,9 @@ u32 dw_spi_update_cr0_v1_01a(struct spi_controller *master,
/* CTRLR0[13] Shift Register Loop */
cr0 |= ((spi->mode & SPI_LOOP) ? 1 : 0) << DWC_SSI_CTRLR0_SRL_OFFSET;
+ if (dws->caps & DW_SPI_CAP_KEEMBAY_MST)
+ cr0 |= DWC_SSI_CTRLR0_KEEMBAY_MST;
+
return cr0;
}
EXPORT_SYMBOL_GPL(dw_spi_update_cr0_v1_01a);
@@ -291,20 +288,18 @@ static int dw_spi_transfer_one(struct spi_controller *master,
{
struct dw_spi *dws = spi_controller_get_devdata(master);
struct chip_data *chip = spi_get_ctldata(spi);
- unsigned long flags;
u8 imask = 0;
u16 txlevel = 0;
u32 cr0;
int ret;
dws->dma_mapped = 0;
- spin_lock_irqsave(&dws->buf_lock, flags);
+ dws->n_bytes = DIV_ROUND_UP(transfer->bits_per_word, BITS_PER_BYTE);
dws->tx = (void *)transfer->tx_buf;
dws->tx_end = dws->tx + transfer->len;
dws->rx = transfer->rx_buf;
dws->rx_end = dws->rx + transfer->len;
dws->len = transfer->len;
- spin_unlock_irqrestore(&dws->buf_lock, flags);
/* Ensure dw->rx and dw->rx_end are visible */
smp_mb();
@@ -323,7 +318,6 @@ static int dw_spi_transfer_one(struct spi_controller *master,
}
transfer->effective_speed_hz = dws->max_freq / chip->clk_div;
- dws->n_bytes = DIV_ROUND_UP(transfer->bits_per_word, BITS_PER_BYTE);
cr0 = dws->update_cr0(master, spi, transfer);
dw_writel(dws, DW_SPI_CTRLR0, cr0);
@@ -445,7 +439,7 @@ static void spi_hw_init(struct device *dev, struct dw_spi *dws)
}
/* enable HW fixup for explicit CS deselect for Amazon's alpine chip */
- if (dws->cs_override)
+ if (dws->caps & DW_SPI_CAP_CS_OVERRIDE)
dw_writel(dws, DW_SPI_CS_OVERRIDE, 0xF);
}
@@ -462,12 +456,13 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
return -ENOMEM;
dws->master = master;
- dws->type = SSI_MOTO_SPI;
dws->dma_addr = (dma_addr_t)(dws->paddr + DW_SPI_DR);
- spin_lock_init(&dws->buf_lock);
spi_controller_set_devdata(master, dws);
+ /* Basic HW init */
+ spi_hw_init(dev, dws);
+
ret = request_irq(dws->irq, dw_spi_irq, IRQF_SHARED, dev_name(dev),
master);
if (ret < 0) {
@@ -498,9 +493,6 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
device_property_read_u32(dev, "rx-sample-delay-ns",
&dws->def_rx_sample_dly_ns);
- /* Basic HW init */
- spi_hw_init(dev, dws);
-
if (dws->dma_ops && dws->dma_ops->dma_init) {
ret = dws->dma_ops->dma_init(dev, dws);
if (ret) {
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-11 00:58:16 +0300