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| author | Mark Brown <broonie@kernel.org> | 2023-04-17 22:27:00 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-04-17 22:27:00 +0300 |
| commit | ed5a25ac750684269b905e434ea9ffcc86e5e75a (patch) | |
| tree | 25fd16933abc57acadd1cfb37ac51d110d440c57 /drivers/spi | |
| parent | 2c8606040a808aa01d2d9e4f5b9332e87bb66377 (diff) | |
| parent | c0b53f4e545e4c6106aab553eb351138d46211cc (diff) | |
| download | linux-ed5a25ac750684269b905e434ea9ffcc86e5e75a.tar.xz | |
spi: cadence-quadspi: Fix random issues with Xilinx
Merge series from Sai Krishna Potthuri <sai.krishna.potthuri@amd.com>:
Update Xilinx Versal external DMA read logic to fix random issues
- Instead of having the fixed timeout, update the read timeout based on
the length of the transfer to avoid timeout for larger data size.
- While switching between external DMA read and indirect read, disable the
SPI before configuration and enable it after configuration as recommended
by Octal-SPI Flash Controller specification.
Sai Krishna Potthuri (2):
spi: cadence-quadspi: Update the read timeout based on the length
spi: cadence-quadspi: Disable the SPI before reconfiguring
drivers/spi/spi-cadence-quadspi.c | 40 ++++++++++++++++++-------------
1 file changed, 24 insertions(+), 16 deletions(-)
--
2.25.1
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-cadence-quadspi.c | 40 |
1 files changed, 24 insertions, 16 deletions
diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c index 79ab7e309644..d4a2b72985da 100644 --- a/drivers/spi/spi-cadence-quadspi.c +++ b/drivers/spi/spi-cadence-quadspi.c @@ -791,6 +791,21 @@ failrd: return ret; } +static void cqspi_controller_enable(struct cqspi_st *cqspi, bool enable) +{ + void __iomem *reg_base = cqspi->iobase; + unsigned int reg; + + reg = readl(reg_base + CQSPI_REG_CONFIG); + + if (enable) + reg |= CQSPI_REG_CONFIG_ENABLE_MASK; + else + reg &= ~CQSPI_REG_CONFIG_ENABLE_MASK; + + writel(reg, reg_base + CQSPI_REG_CONFIG); +} + static int cqspi_versal_indirect_read_dma(struct cqspi_flash_pdata *f_pdata, u_char *rxbuf, loff_t from_addr, size_t n_rx) @@ -815,10 +830,14 @@ static int cqspi_versal_indirect_read_dma(struct cqspi_flash_pdata *f_pdata, if (ret) return ret; + cqspi_controller_enable(cqspi, 0); + reg = readl(cqspi->iobase + CQSPI_REG_CONFIG); reg |= CQSPI_REG_CONFIG_DMA_MASK; writel(reg, cqspi->iobase + CQSPI_REG_CONFIG); + cqspi_controller_enable(cqspi, 1); + dma_addr = dma_map_single(dev, rxbuf, bytes_to_dma, DMA_FROM_DEVICE); if (dma_mapping_error(dev, dma_addr)) { dev_err(dev, "dma mapping failed\n"); @@ -863,7 +882,7 @@ static int cqspi_versal_indirect_read_dma(struct cqspi_flash_pdata *f_pdata, reinit_completion(&cqspi->transfer_complete); if (!wait_for_completion_timeout(&cqspi->transfer_complete, - msecs_to_jiffies(CQSPI_READ_TIMEOUT_MS))) { + msecs_to_jiffies(max_t(size_t, bytes_to_dma, 500)))) { ret = -ETIMEDOUT; goto failrd; } @@ -876,10 +895,14 @@ static int cqspi_versal_indirect_read_dma(struct cqspi_flash_pdata *f_pdata, cqspi->iobase + CQSPI_REG_INDIRECTRD); dma_unmap_single(dev, dma_addr, bytes_to_dma, DMA_FROM_DEVICE); + cqspi_controller_enable(cqspi, 0); + reg = readl(cqspi->iobase + CQSPI_REG_CONFIG); reg &= ~CQSPI_REG_CONFIG_DMA_MASK; writel(reg, cqspi->iobase + CQSPI_REG_CONFIG); + cqspi_controller_enable(cqspi, 1); + ret = zynqmp_pm_ospi_mux_select(cqspi->pd_dev_id, PM_OSPI_MUX_SEL_LINEAR); if (ret) @@ -1182,21 +1205,6 @@ static void cqspi_readdata_capture(struct cqspi_st *cqspi, writel(reg, reg_base + CQSPI_REG_READCAPTURE); } -static void cqspi_controller_enable(struct cqspi_st *cqspi, bool enable) -{ - void __iomem *reg_base = cqspi->iobase; - unsigned int reg; - - reg = readl(reg_base + CQSPI_REG_CONFIG); - - if (enable) - reg |= CQSPI_REG_CONFIG_ENABLE_MASK; - else - reg &= ~CQSPI_REG_CONFIG_ENABLE_MASK; - - writel(reg, reg_base + CQSPI_REG_CONFIG); -} - static void cqspi_configure(struct cqspi_flash_pdata *f_pdata, unsigned long sclk) { |