diff options
Diffstat (limited to 'target/linux/xburst/patches-2.6.34/400-spi-gpio-3wire.patch')
| -rw-r--r-- | target/linux/xburst/patches-2.6.34/400-spi-gpio-3wire.patch | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/target/linux/xburst/patches-2.6.34/400-spi-gpio-3wire.patch b/target/linux/xburst/patches-2.6.34/400-spi-gpio-3wire.patch deleted file mode 100644 index 90ed1cdb0..000000000 --- a/target/linux/xburst/patches-2.6.34/400-spi-gpio-3wire.patch +++ /dev/null @@ -1,189 +0,0 @@ -From 4cee37dd779deeb01f263995e8bd5e7b8457965b Mon Sep 17 00:00:00 2001 -From: Lars-Peter Clausen <lars@metafoo.de> -Date: Sat, 24 Apr 2010 12:23:01 +0200 -Subject: [PATCH] gpio spi 3wire - ---- - drivers/spi/spi_bitbang.c | 2 + - drivers/spi/spi_gpio.c | 60 ++++++++++++++++++++++++++------------ - include/linux/spi/spi_bitbang.h | 2 + - 3 files changed, 45 insertions(+), 19 deletions(-) - -diff --git a/drivers/spi/spi_bitbang.c b/drivers/spi/spi_bitbang.c -index 5265330..2bec91c 100644 ---- a/drivers/spi/spi_bitbang.c -+++ b/drivers/spi/spi_bitbang.c -@@ -335,6 +335,8 @@ static void bitbang_work(struct work_struct *work) - */ - if (!m->is_dma_mapped) - t->rx_dma = t->tx_dma = 0; -+ if ((spi->mode & SPI_3WIRE) && bitbang->set_direction) -+ bitbang->set_direction(spi, t->tx_buf != NULL); - status = bitbang->txrx_bufs(spi, t); - } - if (status > 0) -diff --git a/drivers/spi/spi_gpio.c b/drivers/spi/spi_gpio.c -index 26bd03e..ca769b8 100644 ---- a/drivers/spi/spi_gpio.c -+++ b/drivers/spi/spi_gpio.c -@@ -45,6 +45,8 @@ struct spi_gpio { - struct spi_bitbang bitbang; - struct spi_gpio_platform_data pdata; - struct platform_device *pdev; -+ -+ int miso_pin; - }; - - /*----------------------------------------------------------------------*/ -@@ -88,19 +90,16 @@ struct spi_gpio { - - /*----------------------------------------------------------------------*/ - --static inline const struct spi_gpio_platform_data * __pure --spi_to_pdata(const struct spi_device *spi) -+static inline const struct spi_gpio * __pure -+spi_to_spi_gpio(const struct spi_device *spi) - { - const struct spi_bitbang *bang; -- const struct spi_gpio *spi_gpio; - - bang = spi_master_get_devdata(spi->master); -- spi_gpio = container_of(bang, struct spi_gpio, bitbang); -- return &spi_gpio->pdata; -+ return container_of(bang, struct spi_gpio, bitbang); - } - --/* this is #defined to avoid unused-variable warnings when inlining */ --#define pdata spi_to_pdata(spi) -+#define pdata &(spi_to_spi_gpio(spi)->pdata) - - static inline void setsck(const struct spi_device *spi, int is_on) - { -@@ -114,10 +113,9 @@ static inline void setmosi(const struct spi_device *spi, int is_on) - - static inline int getmiso(const struct spi_device *spi) - { -- return !!gpio_get_value(SPI_MISO_GPIO); -+ return !!gpio_get_value(spi_to_spi_gpio(spi)->miso_pin); - } - --#undef pdata - - /* - * NOTE: this clocks "as fast as we can". It "should" be a function of the -@@ -173,10 +171,16 @@ static u32 spi_gpio_txrx_word_mode3(struct spi_device *spi, - static void spi_gpio_chipselect(struct spi_device *spi, int is_active) - { - unsigned long cs = (unsigned long) spi->controller_data; -+ struct spi_gpio *spi_gpio = spi_to_spi_gpio(spi); - - /* set initial clock polarity */ -- if (is_active) -+ if (is_active) { - setsck(spi, spi->mode & SPI_CPOL); -+ if (spi->mode & SPI_3WIRE) -+ spi_gpio->miso_pin = SPI_MOSI_GPIO; -+ else -+ spi_gpio->miso_pin = SPI_MISO_GPIO; -+ } - - if (cs != SPI_GPIO_NO_CHIPSELECT) { - /* SPI is normally active-low */ -@@ -192,6 +196,9 @@ static int spi_gpio_setup(struct spi_device *spi) - if (spi->bits_per_word > 32) - return -EINVAL; - -+ if (!(spi->mode & SPI_3WIRE) && !gpio_is_valid(SPI_MISO_GPIO)) -+ return -EINVAL; -+ - if (!spi->controller_state) { - if (cs != SPI_GPIO_NO_CHIPSELECT) { - status = gpio_request(cs, dev_name(&spi->dev)); -@@ -209,6 +216,16 @@ static int spi_gpio_setup(struct spi_device *spi) - return status; - } - -+static void spi_gpio_set_direction(struct spi_device *spi, bool is_tx) -+{ -+ if (is_tx) -+ gpio_direction_output(SPI_MISO_GPIO, 0); -+ else -+ gpio_direction_input(SPI_MISO_GPIO); -+} -+ -+#undef pdata -+ - static void spi_gpio_cleanup(struct spi_device *spi) - { - unsigned long cs = (unsigned long) spi->controller_data; -@@ -243,18 +260,20 @@ spi_gpio_request(struct spi_gpio_platform_data *pdata, const char *label) - if (value) - goto done; - -- value = spi_gpio_alloc(SPI_MISO_GPIO, label, true); -+ value = spi_gpio_alloc(SPI_SCK_GPIO, label, false); - if (value) - goto free_mosi; - -- value = spi_gpio_alloc(SPI_SCK_GPIO, label, false); -- if (value) -- goto free_miso; -+ if (gpio_is_valid(SPI_MISO_GPIO)) { -+ value = spi_gpio_alloc(SPI_MISO_GPIO, label, true); -+ if (value) -+ goto free_sck; -+ } - - goto done; - --free_miso: -- gpio_free(SPI_MISO_GPIO); -+free_sck: -+ gpio_free(SPI_SCK_GPIO); - free_mosi: - gpio_free(SPI_MOSI_GPIO); - done: -@@ -302,13 +321,15 @@ static int __init spi_gpio_probe(struct platform_device *pdev) - spi_gpio->bitbang.txrx_word[SPI_MODE_2] = spi_gpio_txrx_word_mode2; - spi_gpio->bitbang.txrx_word[SPI_MODE_3] = spi_gpio_txrx_word_mode3; - spi_gpio->bitbang.setup_transfer = spi_bitbang_setup_transfer; -- spi_gpio->bitbang.flags = SPI_CS_HIGH; -+ spi_gpio->bitbang.set_direction = spi_gpio_set_direction; -+ spi_gpio->bitbang.flags = SPI_CS_HIGH | SPI_3WIRE; - - status = spi_bitbang_start(&spi_gpio->bitbang); - if (status < 0) { - spi_master_put(spi_gpio->bitbang.master); - gpio_free: -- gpio_free(SPI_MISO_GPIO); -+ if (gpio_is_valid(SPI_MOSI_GPIO)) -+ gpio_free(SPI_MISO_GPIO); - gpio_free(SPI_MOSI_GPIO); - gpio_free(SPI_SCK_GPIO); - spi_master_put(master); -@@ -332,7 +353,8 @@ static int __exit spi_gpio_remove(struct platform_device *pdev) - - platform_set_drvdata(pdev, NULL); - -- gpio_free(SPI_MISO_GPIO); -+ if (gpio_is_valid(SPI_MISO_GPIO)) -+ gpio_free(SPI_MISO_GPIO); - gpio_free(SPI_MOSI_GPIO); - gpio_free(SPI_SCK_GPIO); - -diff --git a/include/linux/spi/spi_bitbang.h b/include/linux/spi/spi_bitbang.h -index 3274c50..0a466c9 100644 ---- a/include/linux/spi/spi_bitbang.h -+++ b/include/linux/spi/spi_bitbang.h -@@ -52,6 +52,8 @@ struct spi_bitbang { - u32 (*txrx_word[4])(struct spi_device *spi, - unsigned nsecs, - u32 word, u8 bits); -+ -+ void (*set_direction)(struct spi_device *, bool is_tx); - }; - - /* you can call these default bitbang->master methods from your custom --- -1.5.6.5 - |