diff options
author | Waldemar Brodkorb <wbx@openadk.org> | 2014-09-08 15:09:32 +0200 |
---|---|---|
committer | Waldemar Brodkorb <wbx@openadk.org> | 2014-09-08 15:09:58 +0200 |
commit | 5f9b9b707d9b29b1353c34ca0d6ef0a3dba46583 (patch) | |
tree | 2b2e81058de8693183c3c7514ccff28579f5d3a6 /target/mips/mikrotik-rb4xx/patches/3.14.15/0020-spi-ath79-add-fast-flash-read-support.patch | |
parent | 642da637d9cc31e735a484bd498e6bf916ae85a8 (diff) |
bump all kernels, remove 3.15
Diffstat (limited to 'target/mips/mikrotik-rb4xx/patches/3.14.15/0020-spi-ath79-add-fast-flash-read-support.patch')
-rw-r--r-- | target/mips/mikrotik-rb4xx/patches/3.14.15/0020-spi-ath79-add-fast-flash-read-support.patch | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/target/mips/mikrotik-rb4xx/patches/3.14.15/0020-spi-ath79-add-fast-flash-read-support.patch b/target/mips/mikrotik-rb4xx/patches/3.14.15/0020-spi-ath79-add-fast-flash-read-support.patch deleted file mode 100644 index 8fd174448..000000000 --- a/target/mips/mikrotik-rb4xx/patches/3.14.15/0020-spi-ath79-add-fast-flash-read-support.patch +++ /dev/null @@ -1,202 +0,0 @@ -From c4388a57860440e23c9654f4de2f515433e685a1 Mon Sep 17 00:00:00 2001 -From: Phil Sutter <phil@nwl.cc> -Date: Tue, 13 May 2014 04:12:35 +0200 -Subject: [PATCH] spi-ath79: add fast flash read support - ---- - .../include/asm/mach-ath79/ath79_spi_platform.h | 1 + - drivers/spi/spi-ath79.c | 124 ++++++++++++++++++++- - 2 files changed, 120 insertions(+), 5 deletions(-) - -diff --git a/arch/mips/include/asm/mach-ath79/ath79_spi_platform.h b/arch/mips/include/asm/mach-ath79/ath79_spi_platform.h -index aa2283e..65369fe 100644 ---- a/arch/mips/include/asm/mach-ath79/ath79_spi_platform.h -+++ b/arch/mips/include/asm/mach-ath79/ath79_spi_platform.h -@@ -18,6 +18,7 @@ struct ath79_spi_platform_data { - - struct ath79_spi_controller_data { - unsigned gpio; -+ bool is_flash; - }; - - #endif /* _ATH79_SPI_PLATFORM_H */ -diff --git a/drivers/spi/spi-ath79.c b/drivers/spi/spi-ath79.c -index c3b2fb9..a26a6a4 100644 ---- a/drivers/spi/spi-ath79.c -+++ b/drivers/spi/spi-ath79.c -@@ -35,6 +35,11 @@ - #define ATH79_SPI_RRW_DELAY_FACTOR 12000 - #define MHZ (1000 * 1000) - -+enum ath79_spi_state { -+ ATH79_SPI_STATE_WAIT_CMD = 0, -+ ATH79_SPI_STATE_WAIT_READ, -+}; -+ - struct ath79_spi { - struct spi_bitbang bitbang; - u32 ioc_base; -@@ -42,6 +47,11 @@ struct ath79_spi { - void __iomem *base; - struct clk *clk; - unsigned rrw_delay; -+ -+ enum ath79_spi_state state; -+ u32 clk_div; -+ unsigned long read_addr; -+ unsigned long ahb_rate; - }; - - static inline u32 ath79_spi_rr(struct ath79_spi *sp, unsigned reg) -@@ -104,9 +114,6 @@ static void ath79_spi_enable(struct ath79_spi *sp) - /* save CTRL register */ - sp->reg_ctrl = ath79_spi_rr(sp, AR71XX_SPI_REG_CTRL); - sp->ioc_base = ath79_spi_rr(sp, AR71XX_SPI_REG_IOC); -- -- /* TODO: setup speed? */ -- ath79_spi_wr(sp, AR71XX_SPI_REG_CTRL, 0x43); - } - - static void ath79_spi_disable(struct ath79_spi *sp) -@@ -203,6 +210,110 @@ static u32 ath79_spi_txrx_mode0(struct spi_device *spi, unsigned nsecs, - return ath79_spi_rr(sp, AR71XX_SPI_REG_RDS); - } - -+static int ath79_spi_do_read_flash_data(struct spi_device *spi, -+ struct spi_transfer *t) -+{ -+ struct ath79_spi *sp = ath79_spidev_to_sp(spi); -+ -+ /* disable GPIO mode */ -+ ath79_spi_wr(sp, AR71XX_SPI_REG_FS, 0); -+ -+ memcpy_fromio(t->rx_buf, sp->base + sp->read_addr, t->len); -+ -+ /* enable GPIO mode */ -+ ath79_spi_wr(sp, AR71XX_SPI_REG_FS, AR71XX_SPI_FS_GPIO); -+ -+ /* restore IOC register */ -+ ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base); -+ -+ return t->len; -+} -+ -+static int ath79_spi_do_read_flash_cmd(struct spi_device *spi, -+ struct spi_transfer *t) -+{ -+ struct ath79_spi *sp = ath79_spidev_to_sp(spi); -+ int len; -+ const u8 *p; -+ -+ sp->read_addr = 0; -+ -+ len = t->len - 1; -+ p = t->tx_buf; -+ -+ while (len--) { -+ p++; -+ sp->read_addr <<= 8; -+ sp->read_addr |= *p; -+ } -+ -+ return t->len; -+} -+ -+static bool ath79_spi_is_read_cmd(struct spi_device *spi, -+ struct spi_transfer *t) -+{ -+ return t->type == SPI_TRANSFER_FLASH_READ_CMD; -+} -+ -+static bool ath79_spi_is_data_read(struct spi_device *spi, -+ struct spi_transfer *t) -+{ -+ return t->type == SPI_TRANSFER_FLASH_READ_DATA; -+} -+ -+static int ath79_spi_txrx_bufs(struct spi_device *spi, struct spi_transfer *t) -+{ -+ struct ath79_spi *sp = ath79_spidev_to_sp(spi); -+ int ret; -+ -+ switch (sp->state) { -+ case ATH79_SPI_STATE_WAIT_CMD: -+ if (ath79_spi_is_read_cmd(spi, t)) { -+ ret = ath79_spi_do_read_flash_cmd(spi, t); -+ sp->state = ATH79_SPI_STATE_WAIT_READ; -+ } else { -+ ret = spi_bitbang_bufs(spi, t); -+ } -+ break; -+ -+ case ATH79_SPI_STATE_WAIT_READ: -+ if (ath79_spi_is_data_read(spi, t)) { -+ ret = ath79_spi_do_read_flash_data(spi, t); -+ } else { -+ dev_warn(&spi->dev, "flash data read expected\n"); -+ ret = -EIO; -+ } -+ sp->state = ATH79_SPI_STATE_WAIT_CMD; -+ break; -+ -+ default: -+ BUG(); -+ } -+ -+ return ret; -+} -+ -+static int ath79_spi_setup_transfer(struct spi_device *spi, -+ struct spi_transfer *t) -+{ -+ struct ath79_spi *sp = ath79_spidev_to_sp(spi); -+ struct ath79_spi_controller_data *cdata; -+ int ret; -+ -+ ret = spi_bitbang_setup_transfer(spi, t); -+ if (ret) -+ return ret; -+ -+ cdata = spi->controller_data; -+ if (cdata->is_flash) -+ sp->bitbang.txrx_bufs = ath79_spi_txrx_bufs; -+ else -+ sp->bitbang.txrx_bufs = spi_bitbang_bufs; -+ -+ return ret; -+} -+ - static int ath79_spi_probe(struct platform_device *pdev) - { - struct spi_master *master; -@@ -223,6 +334,8 @@ static int ath79_spi_probe(struct platform_device *pdev) - - pdata = dev_get_platdata(&pdev->dev); - -+ sp->state = ATH79_SPI_STATE_WAIT_CMD; -+ - master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32); - master->setup = ath79_spi_setup; - master->cleanup = ath79_spi_cleanup; -@@ -234,7 +347,7 @@ static int ath79_spi_probe(struct platform_device *pdev) - sp->bitbang.master = master; - sp->bitbang.chipselect = ath79_spi_chipselect; - sp->bitbang.txrx_word[SPI_MODE_0] = ath79_spi_txrx_mode0; -- sp->bitbang.setup_transfer = spi_bitbang_setup_transfer; -+ sp->bitbang.setup_transfer = ath79_spi_setup_transfer; - sp->bitbang.flags = SPI_CS_HIGH; - - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); -@@ -259,7 +372,8 @@ static int ath79_spi_probe(struct platform_device *pdev) - if (ret) - goto err_put_master; - -- rate = DIV_ROUND_UP(clk_get_rate(sp->clk), MHZ); -+ sp->ahb_rate = clk_get_rate(sp->clk); -+ rate = DIV_ROUND_UP(sp->ahb_rate, MHZ); - if (!rate) { - ret = -EINVAL; - goto err_clk_disable; --- -1.8.5.3 - |