84d489f64f
Changelog: https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.14 Some manual changes to target/linux/generic/patches-4.4/610- netfilter_match_bypass_default_checks.patch were needed. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
129 lines
3.5 KiB
Diff
129 lines
3.5 KiB
Diff
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(-)
|
|
|
|
--- 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_mas
|
|
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 *mast
|
|
{
|
|
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 *mast
|
|
|
|
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_
|
|
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_
|
|
/* 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
|
|
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);
|
|
|