diff options
Diffstat (limited to 'target/linux/ipq806x/patches-4.4/709-spi-qup-Fix-fifo-and-dma-support-for-IPQ806x.patch')
| -rw-r--r-- | target/linux/ipq806x/patches-4.4/709-spi-qup-Fix-fifo-and-dma-support-for-IPQ806x.patch | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-4.4/709-spi-qup-Fix-fifo-and-dma-support-for-IPQ806x.patch b/target/linux/ipq806x/patches-4.4/709-spi-qup-Fix-fifo-and-dma-support-for-IPQ806x.patch new file mode 100644 index 0000000000..8c4718e2a6 --- /dev/null +++ b/target/linux/ipq806x/patches-4.4/709-spi-qup-Fix-fifo-and-dma-support-for-IPQ806x.patch @@ -0,0 +1,134 @@ +From 16d2871830ff3fe12a6bff582549a9264adff278 Mon Sep 17 00:00:00 2001 +From: Ram Chandra Jangir <rjangi@codeaurora.org> +Date: Tue, 10 May 2016 20:19:31 +0530 +Subject: [PATCH] spi: qup: Fix fifo and dma support for IPQ806x + +Signed-off-by: Ram Chandra Jangir <rjangi@codeaurora.org> +--- + drivers/spi/spi-qup.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++-- + 1 file changed, 52 insertions(+), 2 deletions(-) + +diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c +index 810a7fa..0808017 100644 +--- a/drivers/spi/spi-qup.c ++++ b/drivers/spi/spi-qup.c +@@ -24,6 +24,7 @@ + #include <linux/spi/spi.h> + #include <linux/dmaengine.h> + #include <linux/dma-mapping.h> ++#include <linux/gpio.h> + + #define QUP_CONFIG 0x0000 + #define QUP_STATE 0x0004 +@@ -152,6 +153,7 @@ struct spi_qup { + int use_dma; + struct dma_slave_config rx_conf; + struct dma_slave_config tx_conf; ++ int mode; + }; + + +@@ -370,7 +372,8 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer) + return ret; + } + +- spi_qup_fifo_write(qup, xfer); ++ if (qup->mode == QUP_IO_M_MODE_FIFO) ++ spi_qup_fifo_write(qup, xfer); + + return 0; + } +@@ -448,6 +451,7 @@ spi_qup_get_mode(struct spi_master *master, struct spi_transfer *xfer) + { + struct spi_qup *qup = spi_master_get_devdata(master); + u32 mode; ++ size_t dma_align = dma_get_cache_alignment(); + + qup->w_size = 4; + +@@ -458,6 +462,14 @@ spi_qup_get_mode(struct spi_master *master, struct spi_transfer *xfer) + + qup->n_words = xfer->len / qup->w_size; + ++ if (!IS_ERR_OR_NULL(master->dma_rx) && ++ IS_ALIGNED((size_t)xfer->tx_buf, dma_align) && ++ IS_ALIGNED((size_t)xfer->rx_buf, dma_align) && ++ !is_vmalloc_addr(xfer->tx_buf) && ++ !is_vmalloc_addr(xfer->rx_buf) && ++ (xfer->len > 3*qup->in_blk_sz)) ++ qup->use_dma = 1; ++ + if (qup->n_words <= (qup->in_fifo_sz / sizeof(u32))) + mode = QUP_IO_M_MODE_FIFO; + else +@@ -491,7 +503,7 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer) + return -EIO; + } + +- mode = spi_qup_get_mode(spi->master, xfer); ++ controller->mode = mode = spi_qup_get_mode(spi->master, xfer); + n_words = controller->n_words; + + if (mode == QUP_IO_M_MODE_FIFO) { +@@ -500,6 +512,7 @@ static int spi_qup_io_config(struct spi_device *spi, struct spi_transfer *xfer) + /* must be zero for FIFO */ + writel_relaxed(0, controller->base + QUP_MX_INPUT_CNT); + writel_relaxed(0, controller->base + QUP_MX_OUTPUT_CNT); ++ controller->use_dma = 0; + } else if (!controller->use_dma) { + writel_relaxed(n_words, controller->base + QUP_MX_INPUT_CNT); + writel_relaxed(n_words, controller->base + QUP_MX_OUTPUT_CNT); +@@ -750,6 +763,38 @@ err_tx: + return ret; + } + ++static void spi_qup_set_cs(struct spi_device *spi, bool val) ++{ ++ struct spi_qup *controller; ++ u32 spi_ioc; ++ u32 spi_ioc_orig; ++ ++ controller = spi_master_get_devdata(spi->master); ++ spi_ioc = readl_relaxed(controller->base + SPI_IO_CONTROL); ++ spi_ioc_orig = spi_ioc; ++ if (!val) ++ spi_ioc |= SPI_IO_C_FORCE_CS; ++ else ++ spi_ioc &= ~SPI_IO_C_FORCE_CS; ++ ++ if (spi_ioc != spi_ioc_orig) ++ writel_relaxed(spi_ioc, controller->base + SPI_IO_CONTROL); ++} ++ ++static int spi_qup_setup(struct spi_device *spi) ++{ ++ if (spi->cs_gpio >= 0) { ++ if (spi->mode & SPI_CS_HIGH) ++ gpio_set_value(spi->cs_gpio, 0); ++ else ++ gpio_set_value(spi->cs_gpio, 1); ++ ++ udelay(10); ++ } ++ ++ return 0; ++} ++ + static int spi_qup_probe(struct platform_device *pdev) + { + struct spi_master *master; +@@ -846,6 +891,11 @@ static int spi_qup_probe(struct platform_device *pdev) + if (of_device_is_compatible(dev->of_node, "qcom,spi-qup-v1.1.1")) + controller->qup_v1 = 1; + ++ if (!controller->qup_v1) ++ master->set_cs = spi_qup_set_cs; ++ else ++ master->setup = spi_qup_setup; ++ + spin_lock_init(&controller->lock); + init_completion(&controller->done); + +-- +2.7.2 + |