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-rw-r--r--target/linux/ramips/patches-4.4/0042-SPI-ralink-add-Ralink-SoC-spi-driver.patch574
1 files changed, 0 insertions, 574 deletions
diff --git a/target/linux/ramips/patches-4.4/0042-SPI-ralink-add-Ralink-SoC-spi-driver.patch b/target/linux/ramips/patches-4.4/0042-SPI-ralink-add-Ralink-SoC-spi-driver.patch
deleted file mode 100644
index 642632628b..0000000000
--- a/target/linux/ramips/patches-4.4/0042-SPI-ralink-add-Ralink-SoC-spi-driver.patch
+++ /dev/null
@@ -1,574 +0,0 @@
-From 683af4ebb91a1600df1946ac4769d916b8a1be65 Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Sun, 27 Jul 2014 11:15:12 +0100
-Subject: [PATCH 42/53] SPI: ralink: add Ralink SoC spi driver
-
-Add the driver needed to make SPI work on Ralink SoC.
-
-Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
-Acked-by: John Crispin <blogic@openwrt.org>
----
- drivers/spi/Kconfig | 6 +
- drivers/spi/Makefile | 1 +
- drivers/spi/spi-rt2880.c | 530 ++++++++++++++++++++++++++++++++++++++++++++++
- 3 files changed, 537 insertions(+)
- create mode 100644 drivers/spi/spi-rt2880.c
-
---- a/drivers/spi/Kconfig
-+++ b/drivers/spi/Kconfig
-@@ -477,6 +477,12 @@ config SPI_QUP
- This driver can also be built as a module. If so, the module
- will be called spi_qup.
-
-+config SPI_RT2880
-+ tristate "Ralink RT288x SPI Controller"
-+ depends on RALINK
-+ help
-+ This selects a driver for the Ralink RT288x/RT305x SPI Controller.
-+
- config SPI_S3C24XX
- tristate "Samsung S3C24XX series SPI"
- depends on ARCH_S3C24XX
---- a/drivers/spi/Makefile
-+++ b/drivers/spi/Makefile
-@@ -70,6 +70,7 @@ obj-$(CONFIG_SPI_QUP) += spi-qup.o
- obj-$(CONFIG_SPI_ROCKCHIP) += spi-rockchip.o
- obj-$(CONFIG_SPI_RB4XX) += spi-rb4xx.o
- obj-$(CONFIG_SPI_RSPI) += spi-rspi.o
-+obj-$(CONFIG_SPI_RT2880) += spi-rt2880.o
- obj-$(CONFIG_SPI_S3C24XX) += spi-s3c24xx-hw.o
- spi-s3c24xx-hw-y := spi-s3c24xx.o
- spi-s3c24xx-hw-$(CONFIG_SPI_S3C24XX_FIQ) += spi-s3c24xx-fiq.o
---- /dev/null
-+++ b/drivers/spi/spi-rt2880.c
-@@ -0,0 +1,530 @@
-+/*
-+ * spi-rt2880.c -- Ralink RT288x/RT305x SPI controller driver
-+ *
-+ * Copyright (C) 2011 Sergiy <piratfm@gmail.com>
-+ * Copyright (C) 2011-2013 Gabor Juhos <juhosg@openwrt.org>
-+ *
-+ * Some parts are based on spi-orion.c:
-+ * Author: Shadi Ammouri <shadi@marvell.com>
-+ * Copyright (C) 2007-2008 Marvell Ltd.
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ */
-+
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/clk.h>
-+#include <linux/err.h>
-+#include <linux/delay.h>
-+#include <linux/io.h>
-+#include <linux/reset.h>
-+#include <linux/spi/spi.h>
-+#include <linux/platform_device.h>
-+#include <linux/gpio.h>
-+
-+#define DRIVER_NAME "spi-rt2880"
-+
-+#define RAMIPS_SPI_STAT 0x00
-+#define RAMIPS_SPI_CFG 0x10
-+#define RAMIPS_SPI_CTL 0x14
-+#define RAMIPS_SPI_DATA 0x20
-+#define RAMIPS_SPI_ADDR 0x24
-+#define RAMIPS_SPI_BS 0x28
-+#define RAMIPS_SPI_USER 0x2C
-+#define RAMIPS_SPI_TXFIFO 0x30
-+#define RAMIPS_SPI_RXFIFO 0x34
-+#define RAMIPS_SPI_FIFO_STAT 0x38
-+#define RAMIPS_SPI_MODE 0x3C
-+#define RAMIPS_SPI_DEV_OFFSET 0x40
-+#define RAMIPS_SPI_DMA 0x80
-+#define RAMIPS_SPI_DMASTAT 0x84
-+#define RAMIPS_SPI_ARBITER 0xF0
-+
-+/* SPISTAT register bit field */
-+#define SPISTAT_BUSY BIT(0)
-+
-+/* SPICFG register bit field */
-+#define SPICFG_ADDRMODE BIT(12)
-+#define SPICFG_RXENVDIS BIT(11)
-+#define SPICFG_RXCAP BIT(10)
-+#define SPICFG_SPIENMODE BIT(9)
-+#define SPICFG_MSBFIRST BIT(8)
-+#define SPICFG_SPICLKPOL BIT(6)
-+#define SPICFG_RXCLKEDGE_FALLING BIT(5)
-+#define SPICFG_TXCLKEDGE_FALLING BIT(4)
-+#define SPICFG_HIZSPI BIT(3)
-+#define SPICFG_SPICLK_PRESCALE_MASK 0x7
-+#define SPICFG_SPICLK_DIV2 0
-+#define SPICFG_SPICLK_DIV4 1
-+#define SPICFG_SPICLK_DIV8 2
-+#define SPICFG_SPICLK_DIV16 3
-+#define SPICFG_SPICLK_DIV32 4
-+#define SPICFG_SPICLK_DIV64 5
-+#define SPICFG_SPICLK_DIV128 6
-+#define SPICFG_SPICLK_DISABLE 7
-+
-+/* SPICTL register bit field */
-+#define SPICTL_START BIT(4)
-+#define SPICTL_HIZSDO BIT(3)
-+#define SPICTL_STARTWR BIT(2)
-+#define SPICTL_STARTRD BIT(1)
-+#define SPICTL_SPIENA BIT(0)
-+
-+/* SPIUSER register bit field */
-+#define SPIUSER_USERMODE BIT(21)
-+#define SPIUSER_INSTR_PHASE BIT(20)
-+#define SPIUSER_ADDR_PHASE_MASK 0x7
-+#define SPIUSER_ADDR_PHASE_OFFSET 17
-+#define SPIUSER_MODE_PHASE BIT(16)
-+#define SPIUSER_DUMMY_PHASE_MASK 0x3
-+#define SPIUSER_DUMMY_PHASE_OFFSET 14
-+#define SPIUSER_DATA_PHASE_MASK 0x3
-+#define SPIUSER_DATA_PHASE_OFFSET 12
-+#define SPIUSER_DATA_READ (BIT(0) << SPIUSER_DATA_PHASE_OFFSET)
-+#define SPIUSER_DATA_WRITE (BIT(1) << SPIUSER_DATA_PHASE_OFFSET)
-+#define SPIUSER_ADDR_TYPE_OFFSET 9
-+#define SPIUSER_MODE_TYPE_OFFSET 6
-+#define SPIUSER_DUMMY_TYPE_OFFSET 3
-+#define SPIUSER_DATA_TYPE_OFFSET 0
-+#define SPIUSER_TRANSFER_MASK 0x7
-+#define SPIUSER_TRANSFER_SINGLE BIT(0)
-+#define SPIUSER_TRANSFER_DUAL BIT(1)
-+#define SPIUSER_TRANSFER_QUAD BIT(2)
-+
-+#define SPIUSER_TRANSFER_TYPE(type) ( \
-+ (type << SPIUSER_ADDR_TYPE_OFFSET) | \
-+ (type << SPIUSER_MODE_TYPE_OFFSET) | \
-+ (type << SPIUSER_DUMMY_TYPE_OFFSET) | \
-+ (type << SPIUSER_DATA_TYPE_OFFSET) \
-+)
-+
-+/* SPIFIFOSTAT register bit field */
-+#define SPIFIFOSTAT_TXEMPTY BIT(19)
-+#define SPIFIFOSTAT_RXEMPTY BIT(18)
-+#define SPIFIFOSTAT_TXFULL BIT(17)
-+#define SPIFIFOSTAT_RXFULL BIT(16)
-+#define SPIFIFOSTAT_FIFO_MASK 0xff
-+#define SPIFIFOSTAT_TX_OFFSET 8
-+#define SPIFIFOSTAT_RX_OFFSET 0
-+
-+#define SPI_FIFO_DEPTH 16
-+
-+/* SPIMODE register bit field */
-+#define SPIMODE_MODE_OFFSET 24
-+#define SPIMODE_DUMMY_OFFSET 0
-+
-+/* SPIARB register bit field */
-+#define SPICTL_ARB_EN BIT(31)
-+#define SPICTL_CSCTL1 BIT(16)
-+#define SPI1_POR BIT(1)
-+#define SPI0_POR BIT(0)
-+
-+#define RT2880_SPI_MODE_BITS (SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST | \
-+ SPI_CS_HIGH)
-+
-+static atomic_t hw_reset_count = ATOMIC_INIT(0);
-+
-+struct rt2880_spi {
-+ struct spi_master *master;
-+ void __iomem *base;
-+ u32 speed;
-+ u16 wait_loops;
-+ u16 mode;
-+ struct clk *clk;
-+};
-+
-+static inline struct rt2880_spi *spidev_to_rt2880_spi(struct spi_device *spi)
-+{
-+ return spi_master_get_devdata(spi->master);
-+}
-+
-+static inline u32 rt2880_spi_read(struct rt2880_spi *rs, u32 reg)
-+{
-+ return ioread32(rs->base + reg);
-+}
-+
-+static inline void rt2880_spi_write(struct rt2880_spi *rs, u32 reg,
-+ const u32 val)
-+{
-+ iowrite32(val, rs->base + reg);
-+}
-+
-+static inline void rt2880_spi_setbits(struct rt2880_spi *rs, u32 reg, u32 mask)
-+{
-+ void __iomem *addr = rs->base + reg;
-+
-+ iowrite32((ioread32(addr) | mask), addr);
-+}
-+
-+static inline void rt2880_spi_clrbits(struct rt2880_spi *rs, u32 reg, u32 mask)
-+{
-+ void __iomem *addr = rs->base + reg;
-+
-+ iowrite32((ioread32(addr) & ~mask), addr);
-+}
-+
-+static u32 rt2880_spi_baudrate_get(struct spi_device *spi, unsigned int speed)
-+{
-+ struct rt2880_spi *rs = spidev_to_rt2880_spi(spi);
-+ u32 rate;
-+ u32 prescale;
-+
-+ /*
-+ * the supported rates are: 2, 4, 8, ... 128
-+ * round up as we look for equal or less speed
-+ */
-+ rate = DIV_ROUND_UP(clk_get_rate(rs->clk), speed);
-+ rate = roundup_pow_of_two(rate);
-+
-+ /* Convert the rate to SPI clock divisor value. */
-+ prescale = ilog2(rate / 2);
-+
-+ /* some tolerance. double and add 100 */
-+ rs->wait_loops = (8 * HZ * loops_per_jiffy) /
-+ (clk_get_rate(rs->clk) / rate);
-+ rs->wait_loops = (rs->wait_loops << 1) + 100;
-+ rs->speed = speed;
-+
-+ dev_dbg(&spi->dev, "speed: %lu/%u, rate: %u, prescal: %u, loops: %hu\n",
-+ clk_get_rate(rs->clk) / rate, speed, rate, prescale,
-+ rs->wait_loops);
-+
-+ return prescale;
-+}
-+
-+static u32 get_arbiter_offset(struct spi_master *master)
-+{
-+ u32 offset;
-+
-+ offset = RAMIPS_SPI_ARBITER;
-+ if (master->bus_num == 1)
-+ offset -= RAMIPS_SPI_DEV_OFFSET;
-+
-+ return offset;
-+}
-+
-+static void rt2880_spi_set_cs(struct spi_device *spi, bool enable)
-+{
-+ struct rt2880_spi *rs = spidev_to_rt2880_spi(spi);
-+
-+ if (enable)
-+ rt2880_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_SPIENA);
-+ else
-+ rt2880_spi_clrbits(rs, RAMIPS_SPI_CTL, SPICTL_SPIENA);
-+}
-+
-+static int rt2880_spi_wait_ready(struct rt2880_spi *rs, int len)
-+{
-+ int loop = rs->wait_loops * len;
-+
-+ while ((rt2880_spi_read(rs, RAMIPS_SPI_STAT) & SPISTAT_BUSY) && --loop)
-+ cpu_relax();
-+
-+ if (loop)
-+ return 0;
-+
-+ return -ETIMEDOUT;
-+}
-+
-+static void rt2880_dump_reg(struct spi_master *master)
-+{
-+ struct rt2880_spi *rs = spi_master_get_devdata(master);
-+
-+ dev_dbg(&master->dev, "stat: %08x, cfg: %08x, ctl: %08x, " \
-+ "data: %08x, arb: %08x\n",
-+ rt2880_spi_read(rs, RAMIPS_SPI_STAT),
-+ rt2880_spi_read(rs, RAMIPS_SPI_CFG),
-+ rt2880_spi_read(rs, RAMIPS_SPI_CTL),
-+ rt2880_spi_read(rs, RAMIPS_SPI_DATA),
-+ rt2880_spi_read(rs, get_arbiter_offset(master)));
-+}
-+
-+static int rt2880_spi_transfer_one(struct spi_master *master,
-+ struct spi_device *spi, struct spi_transfer *xfer)
-+{
-+ struct rt2880_spi *rs = spi_master_get_devdata(master);
-+ unsigned len;
-+ const u8 *tx = xfer->tx_buf;
-+ u8 *rx = xfer->rx_buf;
-+ int err = 0;
-+
-+ /* change clock speed */
-+ if (unlikely(rs->speed != xfer->speed_hz)) {
-+ u32 reg;
-+ reg = rt2880_spi_read(rs, RAMIPS_SPI_CFG);
-+ reg &= ~SPICFG_SPICLK_PRESCALE_MASK;
-+ reg |= rt2880_spi_baudrate_get(spi, xfer->speed_hz);
-+ rt2880_spi_write(rs, RAMIPS_SPI_CFG, reg);
-+ }
-+
-+ if (tx) {
-+ len = xfer->len;
-+ while (len-- > 0) {
-+ rt2880_spi_write(rs, RAMIPS_SPI_DATA, *tx++);
-+ rt2880_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_STARTWR);
-+ err = rt2880_spi_wait_ready(rs, 1);
-+ if (err) {
-+ dev_err(&spi->dev, "TX failed, err=%d\n", err);
-+ goto out;
-+ }
-+ }
-+ }
-+
-+ if (rx) {
-+ len = xfer->len;
-+ while (len-- > 0) {
-+ rt2880_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_STARTRD);
-+ err = rt2880_spi_wait_ready(rs, 1);
-+ if (err) {
-+ dev_err(&spi->dev, "RX failed, err=%d\n", err);
-+ goto out;
-+ }
-+ *rx++ = (u8) rt2880_spi_read(rs, RAMIPS_SPI_DATA);
-+ }
-+ }
-+
-+out:
-+ return err;
-+}
-+
-+/* copy from spi.c */
-+static void spi_set_cs(struct spi_device *spi, bool enable)
-+{
-+ if (spi->mode & SPI_CS_HIGH)
-+ enable = !enable;
-+
-+ if (spi->cs_gpio >= 0)
-+ gpio_set_value(spi->cs_gpio, !enable);
-+ else if (spi->master->set_cs)
-+ spi->master->set_cs(spi, !enable);
-+}
-+
-+static int rt2880_spi_setup(struct spi_device *spi)
-+{
-+ struct spi_master *master = spi->master;
-+ struct rt2880_spi *rs = spi_master_get_devdata(master);
-+ u32 reg, old_reg, arbit_off;
-+
-+ if ((spi->max_speed_hz > master->max_speed_hz) ||
-+ (spi->max_speed_hz < master->min_speed_hz)) {
-+ dev_err(&spi->dev, "invalide requested speed %d Hz\n",
-+ spi->max_speed_hz);
-+ return -EINVAL;
-+ }
-+
-+ if (!(master->bits_per_word_mask &
-+ BIT(spi->bits_per_word - 1))) {
-+ dev_err(&spi->dev, "invalide bits_per_word %d\n",
-+ spi->bits_per_word);
-+ return -EINVAL;
-+ }
-+
-+ /* the hardware seems can't work on mode0 force it to mode3 */
-+ if ((spi->mode & (SPI_CPOL | SPI_CPHA)) == SPI_MODE_0) {
-+ dev_warn(&spi->dev, "force spi mode3\n");
-+ spi->mode |= SPI_MODE_3;
-+ }
-+
-+ /* chip polarity */
-+ arbit_off = get_arbiter_offset(master);
-+ reg = old_reg = rt2880_spi_read(rs, arbit_off);
-+ if (spi->mode & SPI_CS_HIGH) {
-+ switch (master->bus_num) {
-+ case 1:
-+ reg |= SPI1_POR;
-+ break;
-+ default:
-+ reg |= SPI0_POR;
-+ break;
-+ }
-+ } else {
-+ switch (master->bus_num) {
-+ case 1:
-+ reg &= ~SPI1_POR;
-+ break;
-+ default:
-+ reg &= ~SPI0_POR;
-+ break;
-+ }
-+ }
-+
-+ /* enable spi1 */
-+ if (master->bus_num == 1)
-+ reg |= SPICTL_ARB_EN;
-+
-+ if (reg != old_reg)
-+ rt2880_spi_write(rs, arbit_off, reg);
-+
-+ /* deselected the spi device */
-+ spi_set_cs(spi, false);
-+
-+ rt2880_dump_reg(master);
-+
-+ return 0;
-+}
-+
-+static int rt2880_spi_prepare_message(struct spi_master *master,
-+ struct spi_message *msg)
-+{
-+ struct rt2880_spi *rs = spi_master_get_devdata(master);
-+ struct spi_device *spi = msg->spi;
-+ u32 reg;
-+
-+ if ((rs->mode == spi->mode) && (rs->speed == spi->max_speed_hz))
-+ return 0;
-+
-+#if 0
-+ /* set spido to tri-state */
-+ rt2880_spi_setbits(rs, RAMIPS_SPI_CTL, SPICTL_HIZSDO);
-+#endif
-+
-+ reg = rt2880_spi_read(rs, RAMIPS_SPI_CFG);
-+
-+ reg &= ~(SPICFG_MSBFIRST | SPICFG_SPICLKPOL |
-+ SPICFG_RXCLKEDGE_FALLING |
-+ SPICFG_TXCLKEDGE_FALLING |
-+ SPICFG_SPICLK_PRESCALE_MASK);
-+
-+ /* MSB */
-+ if (!(spi->mode & SPI_LSB_FIRST))
-+ reg |= SPICFG_MSBFIRST;
-+
-+ /* spi mode */
-+ switch (spi->mode & (SPI_CPOL | SPI_CPHA)) {
-+ case SPI_MODE_0:
-+ reg |= SPICFG_TXCLKEDGE_FALLING;
-+ break;
-+ case SPI_MODE_1:
-+ reg |= SPICFG_RXCLKEDGE_FALLING;
-+ break;
-+ case SPI_MODE_2:
-+ reg |= SPICFG_SPICLKPOL | SPICFG_RXCLKEDGE_FALLING;
-+ break;
-+ case SPI_MODE_3:
-+ reg |= SPICFG_SPICLKPOL | SPICFG_TXCLKEDGE_FALLING;
-+ break;
-+ }
-+ rs->mode = spi->mode;
-+
-+#if 0
-+ /* set spiclk and spiena to tri-state */
-+ reg |= SPICFG_HIZSPI;
-+#endif
-+
-+ /* clock divide */
-+ reg |= rt2880_spi_baudrate_get(spi, spi->max_speed_hz);
-+
-+ rt2880_spi_write(rs, RAMIPS_SPI_CFG, reg);
-+
-+ return 0;
-+}
-+
-+static int rt2880_spi_probe(struct platform_device *pdev)
-+{
-+ struct spi_master *master;
-+ struct rt2880_spi *rs;
-+ void __iomem *base;
-+ struct resource *r;
-+ struct clk *clk;
-+ int ret;
-+
-+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ base = devm_ioremap_resource(&pdev->dev, r);
-+ if (IS_ERR(base))
-+ return PTR_ERR(base);
-+
-+ clk = devm_clk_get(&pdev->dev, NULL);
-+ if (IS_ERR(clk)) {
-+ dev_err(&pdev->dev, "unable to get SYS clock\n");
-+ return PTR_ERR(clk);
-+ }
-+
-+ ret = clk_prepare_enable(clk);
-+ if (ret)
-+ goto err_clk;
-+
-+ master = spi_alloc_master(&pdev->dev, sizeof(*rs));
-+ if (master == NULL) {
-+ dev_dbg(&pdev->dev, "master allocation failed\n");
-+ ret = -ENOMEM;
-+ goto err_clk;
-+ }
-+
-+ master->dev.of_node = pdev->dev.of_node;
-+ master->mode_bits = RT2880_SPI_MODE_BITS;
-+ master->bits_per_word_mask = SPI_BPW_MASK(8);
-+ master->min_speed_hz = clk_get_rate(clk) / 128;
-+ master->max_speed_hz = clk_get_rate(clk) / 2;
-+ master->flags = SPI_MASTER_HALF_DUPLEX;
-+ master->setup = rt2880_spi_setup;
-+ master->prepare_message = rt2880_spi_prepare_message;
-+ master->set_cs = rt2880_spi_set_cs;
-+ master->transfer_one = rt2880_spi_transfer_one,
-+
-+ dev_set_drvdata(&pdev->dev, master);
-+
-+ rs = spi_master_get_devdata(master);
-+ rs->master = master;
-+ rs->base = base;
-+ rs->clk = clk;
-+
-+ if (atomic_inc_return(&hw_reset_count) == 1)
-+ device_reset(&pdev->dev);
-+
-+ ret = devm_spi_register_master(&pdev->dev, master);
-+ if (ret < 0) {
-+ dev_err(&pdev->dev, "devm_spi_register_master error.\n");
-+ goto err_master;
-+ }
-+
-+ return ret;
-+
-+err_master:
-+ spi_master_put(master);
-+ kfree(master);
-+err_clk:
-+ clk_disable_unprepare(clk);
-+
-+ return ret;
-+}
-+
-+static int rt2880_spi_remove(struct platform_device *pdev)
-+{
-+ struct spi_master *master;
-+ struct rt2880_spi *rs;
-+
-+ master = dev_get_drvdata(&pdev->dev);
-+ rs = spi_master_get_devdata(master);
-+
-+ clk_disable_unprepare(rs->clk);
-+ atomic_dec(&hw_reset_count);
-+
-+ return 0;
-+}
-+
-+MODULE_ALIAS("platform:" DRIVER_NAME);
-+
-+static const struct of_device_id rt2880_spi_match[] = {
-+ { .compatible = "ralink,rt2880-spi" },
-+ {},
-+};
-+MODULE_DEVICE_TABLE(of, rt2880_spi_match);
-+
-+static struct platform_driver rt2880_spi_driver = {
-+ .driver = {
-+ .name = DRIVER_NAME,
-+ .owner = THIS_MODULE,
-+ .of_match_table = rt2880_spi_match,
-+ },
-+ .probe = rt2880_spi_probe,
-+ .remove = rt2880_spi_remove,
-+};
-+
-+module_platform_driver(rt2880_spi_driver);
-+
-+MODULE_DESCRIPTION("Ralink SPI driver");
-+MODULE_AUTHOR("Sergiy <piratfm@gmail.com>");
-+MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
-+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 19:20:25 +0000