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-rw-r--r--target/linux/brcm63xx/patches-3.10/049-spi-add-bcm63xx-HSSPI-driver.patch531
1 files changed, 0 insertions, 531 deletions
diff --git a/target/linux/brcm63xx/patches-3.10/049-spi-add-bcm63xx-HSSPI-driver.patch b/target/linux/brcm63xx/patches-3.10/049-spi-add-bcm63xx-HSSPI-driver.patch
deleted file mode 100644
index a18117b..0000000
--- a/target/linux/brcm63xx/patches-3.10/049-spi-add-bcm63xx-HSSPI-driver.patch
+++ /dev/null
@@ -1,531 +0,0 @@
-From 8e051b79ae3f66dbad96312fe2976401c28d2148 Mon Sep 17 00:00:00 2001
-From: Jonas Gorski <jogo@openwrt.org>
-Date: Sat, 12 Nov 2011 12:19:55 +0100
-Subject: [PATCH 5/5] spi: add bcm63xx HSSPI driver
-
-Add a driver for the High Speed SPI controller found on newer BCM63XX SoCs.
-
-It does feature some new modes like 3-wire or dual spi, but neither of it
-is currently implemented.
-
-Signed-off-by: Jonas Gorski <jogo@openwrt.org>
----
- drivers/spi/Kconfig | 7 +
- drivers/spi/Makefile | 1 +
- drivers/spi/spi-bcm63xx-hsspi.c | 484 ++++++++++++++++++++++++++++++++++++++++
- 3 files changed, 492 insertions(+)
- create mode 100644 drivers/spi/spi-bcm63xx-hsspi.c
-
---- a/drivers/spi/Kconfig
-+++ b/drivers/spi/Kconfig
-@@ -112,6 +112,13 @@ config SPI_BCM63XX
- help
- Enable support for the SPI controller on the Broadcom BCM63xx SoCs.
-
-+config SPI_BCM63XX_HSSPI
-+ tristate "Broadcom BCM63XX HS SPI controller driver"
-+ depends on BCM63XX || COMPILE_TEST
-+ help
-+ This enables support for the High Speed SPI controller present on
-+ newer Broadcom BCM63XX SoCs.
-+
- config SPI_BITBANG
- tristate "Utilities for Bitbanging SPI masters"
- help
---- a/drivers/spi/Makefile
-+++ b/drivers/spi/Makefile
-@@ -16,6 +16,7 @@ obj-$(CONFIG_SPI_ATH79) += spi-ath79.o
- obj-$(CONFIG_SPI_AU1550) += spi-au1550.o
- obj-$(CONFIG_SPI_BCM2835) += spi-bcm2835.o
- obj-$(CONFIG_SPI_BCM63XX) += spi-bcm63xx.o
-+obj-$(CONFIG_SPI_BCM63XX_HSSPI) += spi-bcm63xx-hsspi.o
- obj-$(CONFIG_SPI_BFIN5XX) += spi-bfin5xx.o
- obj-$(CONFIG_SPI_BFIN_SPORT) += spi-bfin-sport.o
- obj-$(CONFIG_SPI_BITBANG) += spi-bitbang.o
---- /dev/null
-+++ b/drivers/spi/spi-bcm63xx-hsspi.c
-@@ -0,0 +1,484 @@
-+/*
-+ * Broadcom BCM63XX High Speed SPI Controller driver
-+ *
-+ * Copyright 2000-2010 Broadcom Corporation
-+ * Copyright 2012-2013 Jonas Gorski <jogo@openwrt.org>
-+ *
-+ * Licensed under the GNU/GPL. See COPYING for details.
-+ */
-+
-+#include <linux/kernel.h>
-+#include <linux/init.h>
-+#include <linux/io.h>
-+#include <linux/clk.h>
-+#include <linux/module.h>
-+#include <linux/platform_device.h>
-+#include <linux/delay.h>
-+#include <linux/dma-mapping.h>
-+#include <linux/err.h>
-+#include <linux/interrupt.h>
-+#include <linux/spi/spi.h>
-+#include <linux/workqueue.h>
-+#include <linux/mutex.h>
-+
-+#define HSSPI_GLOBAL_CTRL_REG 0x0
-+#define GLOBAL_CTRL_CS_POLARITY_SHIFT 0
-+#define GLOBAL_CTRL_CS_POLARITY_MASK 0x000000ff
-+#define GLOBAL_CTRL_PLL_CLK_CTRL_SHIFT 8
-+#define GLOBAL_CTRL_PLL_CLK_CTRL_MASK 0x0000ff00
-+#define GLOBAL_CTRL_CLK_GATE_SSOFF BIT(16)
-+#define GLOBAL_CTRL_CLK_POLARITY BIT(17)
-+#define GLOBAL_CTRL_MOSI_IDLE BIT(18)
-+
-+#define HSSPI_GLOBAL_EXT_TRIGGER_REG 0x4
-+
-+#define HSSPI_INT_STATUS_REG 0x8
-+#define HSSPI_INT_STATUS_MASKED_REG 0xc
-+#define HSSPI_INT_MASK_REG 0x10
-+
-+#define HSSPI_PINGx_CMD_DONE(i) BIT((i * 8) + 0)
-+#define HSSPI_PINGx_RX_OVER(i) BIT((i * 8) + 1)
-+#define HSSPI_PINGx_TX_UNDER(i) BIT((i * 8) + 2)
-+#define HSSPI_PINGx_POLL_TIMEOUT(i) BIT((i * 8) + 3)
-+#define HSSPI_PINGx_CTRL_INVAL(i) BIT((i * 8) + 4)
-+
-+#define HSSPI_INT_CLEAR_ALL 0xff001f1f
-+
-+#define HSSPI_PINGPONG_COMMAND_REG(x) (0x80 + (x) * 0x40)
-+#define PINGPONG_CMD_COMMAND_MASK 0xf
-+#define PINGPONG_COMMAND_NOOP 0
-+#define PINGPONG_COMMAND_START_NOW 1
-+#define PINGPONG_COMMAND_START_TRIGGER 2
-+#define PINGPONG_COMMAND_HALT 3
-+#define PINGPONG_COMMAND_FLUSH 4
-+#define PINGPONG_CMD_PROFILE_SHIFT 8
-+#define PINGPONG_CMD_SS_SHIFT 12
-+
-+#define HSSPI_PINGPONG_STATUS_REG(x) (0x84 + (x) * 0x40)
-+
-+#define HSSPI_PROFILE_CLK_CTRL_REG(x) (0x100 + (x) * 0x20)
-+#define CLK_CTRL_FREQ_CTRL_MASK 0x0000ffff
-+#define CLK_CTRL_SPI_CLK_2X_SEL BIT(14)
-+#define CLK_CTRL_ACCUM_RST_ON_LOOP BIT(15)
-+
-+#define HSSPI_PROFILE_SIGNAL_CTRL_REG(x) (0x104 + (x) * 0x20)
-+#define SIGNAL_CTRL_LATCH_RISING BIT(12)
-+#define SIGNAL_CTRL_LAUNCH_RISING BIT(13)
-+#define SIGNAL_CTRL_ASYNC_INPUT_PATH BIT(16)
-+
-+#define HSSPI_PROFILE_MODE_CTRL_REG(x) (0x108 + (x) * 0x20)
-+#define MODE_CTRL_MULTIDATA_RD_STRT_SHIFT 8
-+#define MODE_CTRL_MULTIDATA_WR_STRT_SHIFT 12
-+#define MODE_CTRL_MULTIDATA_RD_SIZE_SHIFT 16
-+#define MODE_CTRL_MULTIDATA_WR_SIZE_SHIFT 18
-+#define MODE_CTRL_MODE_3WIRE BIT(20)
-+#define MODE_CTRL_PREPENDBYTE_CNT_SHIFT 24
-+
-+#define HSSPI_FIFO_REG(x) (0x200 + (x) * 0x200)
-+
-+
-+#define HSSPI_OP_CODE_SHIFT 13
-+#define HSSPI_OP_SLEEP (0 << HSSPI_OP_CODE_SHIFT)
-+#define HSSPI_OP_READ_WRITE (1 << HSSPI_OP_CODE_SHIFT)
-+#define HSSPI_OP_WRITE (2 << HSSPI_OP_CODE_SHIFT)
-+#define HSSPI_OP_READ (3 << HSSPI_OP_CODE_SHIFT)
-+#define HSSPI_OP_SETIRQ (4 << HSSPI_OP_CODE_SHIFT)
-+
-+#define HSSPI_BUFFER_LEN 512
-+#define HSSPI_OPCODE_LEN 2
-+
-+#define HSSPI_MAX_PREPEND_LEN 15
-+
-+#define HSSPI_MAX_SYNC_CLOCK 30000000
-+
-+#define HSSPI_BUS_NUM 1 /* 0 is legacy SPI */
-+
-+struct bcm63xx_hsspi {
-+ struct completion done;
-+ struct mutex bus_mutex;
-+
-+ struct platform_device *pdev;
-+ struct clk *clk;
-+ void __iomem *regs;
-+ u8 __iomem *fifo;
-+
-+ u32 speed_hz;
-+ u8 cs_polarity;
-+};
-+
-+static void bcm63xx_hsspi_set_cs(struct bcm63xx_hsspi *bs, unsigned cs,
-+ bool active)
-+{
-+ u32 reg;
-+
-+ mutex_lock(&bs->bus_mutex);
-+ reg = __raw_readl(bs->regs + HSSPI_GLOBAL_CTRL_REG);
-+
-+ reg &= ~BIT(cs);
-+ if (active == !(bs->cs_polarity & BIT(cs)))
-+ reg |= BIT(cs);
-+
-+ __raw_writel(reg, bs->regs + HSSPI_GLOBAL_CTRL_REG);
-+ mutex_unlock(&bs->bus_mutex);
-+}
-+
-+static void bcm63xx_hsspi_set_clk(struct bcm63xx_hsspi *bs,
-+ struct spi_device *spi, int hz)
-+{
-+ unsigned profile = spi->chip_select;
-+ u32 reg;
-+
-+ reg = DIV_ROUND_UP(2048, DIV_ROUND_UP(bs->speed_hz, hz));
-+ __raw_writel(CLK_CTRL_ACCUM_RST_ON_LOOP | reg,
-+ bs->regs + HSSPI_PROFILE_CLK_CTRL_REG(profile));
-+
-+ reg = __raw_readl(bs->regs + HSSPI_PROFILE_SIGNAL_CTRL_REG(profile));
-+ if (hz > HSSPI_MAX_SYNC_CLOCK)
-+ reg |= SIGNAL_CTRL_ASYNC_INPUT_PATH;
-+ else
-+ reg &= ~SIGNAL_CTRL_ASYNC_INPUT_PATH;
-+ __raw_writel(reg, bs->regs + HSSPI_PROFILE_SIGNAL_CTRL_REG(profile));
-+
-+ mutex_lock(&bs->bus_mutex);
-+ /* setup clock polarity */
-+ reg = __raw_readl(bs->regs + HSSPI_GLOBAL_CTRL_REG);
-+ reg &= ~GLOBAL_CTRL_CLK_POLARITY;
-+ if (spi->mode & SPI_CPOL)
-+ reg |= GLOBAL_CTRL_CLK_POLARITY;
-+ __raw_writel(reg, bs->regs + HSSPI_GLOBAL_CTRL_REG);
-+ mutex_unlock(&bs->bus_mutex);
-+}
-+
-+static int bcm63xx_hsspi_do_txrx(struct spi_device *spi, struct spi_transfer *t)
-+{
-+ struct bcm63xx_hsspi *bs = spi_master_get_devdata(spi->master);
-+ unsigned chip_select = spi->chip_select;
-+ u16 opcode = 0;
-+ int pending = t->len;
-+ int step_size = HSSPI_BUFFER_LEN;
-+ const u8 *tx = t->tx_buf;
-+ u8 *rx = t->rx_buf;
-+
-+ bcm63xx_hsspi_set_clk(bs, spi, t->speed_hz);
-+ bcm63xx_hsspi_set_cs(bs, spi->chip_select, true);
-+
-+ if (tx && rx)
-+ opcode = HSSPI_OP_READ_WRITE;
-+ else if (tx)
-+ opcode = HSSPI_OP_WRITE;
-+ else if (rx)
-+ opcode = HSSPI_OP_READ;
-+
-+ if (opcode != HSSPI_OP_READ)
-+ step_size -= HSSPI_OPCODE_LEN;
-+
-+ __raw_writel(0 << MODE_CTRL_PREPENDBYTE_CNT_SHIFT |
-+ 2 << MODE_CTRL_MULTIDATA_WR_STRT_SHIFT |
-+ 2 << MODE_CTRL_MULTIDATA_RD_STRT_SHIFT | 0xff,
-+ bs->regs + HSSPI_PROFILE_MODE_CTRL_REG(chip_select));
-+
-+ while (pending > 0) {
-+ int curr_step = min_t(int, step_size, pending);
-+
-+ init_completion(&bs->done);
-+ if (tx) {
-+ memcpy_toio(bs->fifo + HSSPI_OPCODE_LEN, tx, curr_step);
-+ tx += curr_step;
-+ }
-+
-+ __raw_writew(opcode | curr_step, bs->fifo);
-+
-+ /* enable interrupt */
-+ __raw_writel(HSSPI_PINGx_CMD_DONE(0),
-+ bs->regs + HSSPI_INT_MASK_REG);
-+
-+ /* start the transfer */
-+ __raw_writel(!chip_select << PINGPONG_CMD_SS_SHIFT |
-+ chip_select << PINGPONG_CMD_PROFILE_SHIFT |
-+ PINGPONG_COMMAND_START_NOW,
-+ bs->regs + HSSPI_PINGPONG_COMMAND_REG(0));
-+
-+ if (wait_for_completion_timeout(&bs->done, HZ) == 0) {
-+ dev_err(&bs->pdev->dev, "transfer timed out!\n");
-+ return -ETIMEDOUT;
-+ }
-+
-+ if (rx) {
-+ memcpy_fromio(rx, bs->fifo, curr_step);
-+ rx += curr_step;
-+ }
-+
-+ pending -= curr_step;
-+ }
-+
-+ return 0;
-+}
-+
-+static int bcm63xx_hsspi_setup(struct spi_device *spi)
-+{
-+ struct bcm63xx_hsspi *bs = spi_master_get_devdata(spi->master);
-+ u32 reg;
-+
-+ reg = __raw_readl(bs->regs +
-+ HSSPI_PROFILE_SIGNAL_CTRL_REG(spi->chip_select));
-+ reg &= ~(SIGNAL_CTRL_LAUNCH_RISING | SIGNAL_CTRL_LATCH_RISING);
-+ if (spi->mode & SPI_CPHA)
-+ reg |= SIGNAL_CTRL_LAUNCH_RISING;
-+ else
-+ reg |= SIGNAL_CTRL_LATCH_RISING;
-+ __raw_writel(reg, bs->regs +
-+ HSSPI_PROFILE_SIGNAL_CTRL_REG(spi->chip_select));
-+
-+ mutex_lock(&bs->bus_mutex);
-+ reg = __raw_readl(bs->regs + HSSPI_GLOBAL_CTRL_REG);
-+
-+ /* only change actual polarities if there is no transfer */
-+ if ((reg & GLOBAL_CTRL_CS_POLARITY_MASK) == bs->cs_polarity) {
-+ if (spi->mode & SPI_CS_HIGH)
-+ reg |= BIT(spi->chip_select);
-+ else
-+ reg &= ~BIT(spi->chip_select);
-+ __raw_writel(reg, bs->regs + HSSPI_GLOBAL_CTRL_REG);
-+ }
-+
-+ if (spi->mode & SPI_CS_HIGH)
-+ bs->cs_polarity |= BIT(spi->chip_select);
-+ else
-+ bs->cs_polarity &= ~BIT(spi->chip_select);
-+
-+ mutex_unlock(&bs->bus_mutex);
-+
-+ return 0;
-+}
-+
-+static int bcm63xx_hsspi_transfer_one(struct spi_master *master,
-+ struct spi_message *msg)
-+{
-+ struct bcm63xx_hsspi *bs = spi_master_get_devdata(master);
-+ struct spi_transfer *t;
-+ struct spi_device *spi = msg->spi;
-+ int status = -EINVAL;
-+ int dummy_cs;
-+ u32 reg;
-+
-+ /* This controller does not support keeping CS active during idle.
-+ * To work around this, we use the following ugly hack:
-+ *
-+ * a. Invert the target chip select's polarity so it will be active.
-+ * b. Select a "dummy" chip select to use as the hardware target.
-+ * c. Invert the dummy chip select's polarity so it will be inactive
-+ * during the actual transfers.
-+ * d. Tell the hardware to send to the dummy chip select. Thanks to
-+ * the multiplexed nature of SPI the actual target will receive
-+ * the transfer and we see its response.
-+ *
-+ * e. At the end restore the polarities again to their default values.
-+ */
-+
-+ dummy_cs = !spi->chip_select;
-+ bcm63xx_hsspi_set_cs(bs, dummy_cs, true);
-+
-+ list_for_each_entry(t, &msg->transfers, transfer_list) {
-+ status = bcm63xx_hsspi_do_txrx(spi, t);
-+ if (status)
-+ break;
-+
-+ msg->actual_length += t->len;
-+
-+ if (t->delay_usecs)
-+ udelay(t->delay_usecs);
-+
-+ if (t->cs_change)
-+ bcm63xx_hsspi_set_cs(bs, spi->chip_select, false);
-+ }
-+
-+ mutex_lock(&bs->bus_mutex);
-+ reg = __raw_readl(bs->regs + HSSPI_GLOBAL_CTRL_REG);
-+ reg &= ~GLOBAL_CTRL_CS_POLARITY_MASK;
-+ reg |= bs->cs_polarity;
-+ __raw_writel(reg, bs->regs + HSSPI_GLOBAL_CTRL_REG);
-+ mutex_unlock(&bs->bus_mutex);
-+
-+ msg->status = status;
-+ spi_finalize_current_message(master);
-+
-+ return 0;
-+}
-+
-+static irqreturn_t bcm63xx_hsspi_interrupt(int irq, void *dev_id)
-+{
-+ struct bcm63xx_hsspi *bs = (struct bcm63xx_hsspi *)dev_id;
-+
-+ if (__raw_readl(bs->regs + HSSPI_INT_STATUS_MASKED_REG) == 0)
-+ return IRQ_NONE;
-+
-+ __raw_writel(HSSPI_INT_CLEAR_ALL, bs->regs + HSSPI_INT_STATUS_REG);
-+ __raw_writel(0, bs->regs + HSSPI_INT_MASK_REG);
-+
-+ complete(&bs->done);
-+
-+ return IRQ_HANDLED;
-+}
-+
-+static int bcm63xx_hsspi_probe(struct platform_device *pdev)
-+{
-+ struct spi_master *master;
-+ struct bcm63xx_hsspi *bs;
-+ struct resource *res_mem;
-+ void __iomem *regs;
-+ struct device *dev = &pdev->dev;
-+ struct clk *clk;
-+ int irq, ret;
-+ u32 reg, rate;
-+
-+ irq = platform_get_irq(pdev, 0);
-+ if (irq < 0) {
-+ dev_err(dev, "no irq\n");
-+ return -ENXIO;
-+ }
-+
-+ res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+ regs = devm_request_and_ioremap(dev, res_mem);
-+ if (IS_ERR(regs))
-+ return PTR_ERR(regs);
-+
-+ clk = clk_get(dev, "hsspi");
-+
-+ if (IS_ERR(clk))
-+ return PTR_ERR(clk);
-+
-+ rate = clk_get_rate(clk);
-+ if (!rate) {
-+ ret = -EINVAL;
-+ goto out_put_clk;
-+ }
-+
-+ clk_prepare_enable(clk);
-+
-+ master = spi_alloc_master(&pdev->dev, sizeof(*bs));
-+ if (!master) {
-+ ret = -ENOMEM;
-+ goto out_disable_clk;
-+ }
-+
-+ bs = spi_master_get_devdata(master);
-+ bs->pdev = pdev;
-+ bs->clk = clk;
-+ bs->regs = regs;
-+ bs->speed_hz = rate;
-+ bs->fifo = (u8 __iomem *)(bs->regs + HSSPI_FIFO_REG(0));
-+
-+ mutex_init(&bs->bus_mutex);
-+
-+ master->bus_num = HSSPI_BUS_NUM;
-+ master->num_chipselect = 8;
-+ master->setup = bcm63xx_hsspi_setup;
-+ master->transfer_one_message = bcm63xx_hsspi_transfer_one;
-+ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
-+ master->bits_per_word_mask = SPI_BPW_MASK(8);
-+ master->auto_runtime_pm = true;
-+
-+ platform_set_drvdata(pdev, master);
-+
-+ /* Initialize the hardware */
-+ __raw_writel(0, bs->regs + HSSPI_INT_MASK_REG);
-+
-+ /* clean up any pending interrupts */
-+ __raw_writel(HSSPI_INT_CLEAR_ALL, bs->regs + HSSPI_INT_STATUS_REG);
-+
-+ /* read out default CS polarities */
-+ reg = __raw_readl(bs->regs + HSSPI_GLOBAL_CTRL_REG);
-+ bs->cs_polarity = reg & GLOBAL_CTRL_CS_POLARITY_MASK;
-+ __raw_writel(reg | GLOBAL_CTRL_CLK_GATE_SSOFF,
-+ bs->regs + HSSPI_GLOBAL_CTRL_REG);
-+
-+ ret = devm_request_irq(dev, irq, bcm63xx_hsspi_interrupt, IRQF_SHARED,
-+ pdev->name, bs);
-+
-+ if (ret)
-+ goto out_put_master;
-+
-+ /* register and we are done */
-+ ret = spi_register_master(master);
-+ if (ret)
-+ goto out_put_master;
-+
-+ return 0;
-+
-+out_put_master:
-+ spi_master_put(master);
-+out_disable_clk:
-+ clk_disable_unprepare(clk);
-+out_put_clk:
-+ clk_put(clk);
-+
-+ return ret;
-+}
-+
-+
-+static int bcm63xx_hsspi_remove(struct platform_device *pdev)
-+{
-+ struct spi_master *master = platform_get_drvdata(pdev);
-+ struct bcm63xx_hsspi *bs = spi_master_get_devdata(master);
-+
-+ spi_unregister_master(master);
-+
-+ /* reset the hardware and block queue progress */
-+ __raw_writel(0, bs->regs + HSSPI_INT_MASK_REG);
-+ clk_disable_unprepare(bs->clk);
-+ clk_put(bs->clk);
-+
-+ return 0;
-+}
-+
-+#ifdef CONFIG_PM
-+static int bcm63xx_hsspi_suspend(struct device *dev)
-+{
-+ struct spi_master *master = dev_get_drvdata(dev);
-+ struct bcm63xx_hsspi *bs = spi_master_get_devdata(master);
-+
-+ spi_master_suspend(master);
-+ clk_disable(bs->clk);
-+
-+ return 0;
-+}
-+
-+static int bcm63xx_hsspi_resume(struct device *dev)
-+{
-+ struct spi_master *master = dev_get_drvdata(dev);
-+ struct bcm63xx_hsspi *bs = spi_master_get_devdata(master);
-+
-+ clk_enable(bs->clk);
-+ spi_master_resume(master);
-+
-+ return 0;
-+}
-+
-+static const struct dev_pm_ops bcm63xx_hsspi_pm_ops = {
-+ .suspend = bcm63xx_hsspi_suspend,
-+ .resume = bcm63xx_hsspi_resume,
-+};
-+
-+#define BCM63XX_HSSPI_PM_OPS (&bcm63xx_hsspi_pm_ops)
-+#else
-+#define BCM63XX_HSSPI_PM_OPS NULL
-+#endif
-+
-+
-+
-+static struct platform_driver bcm63xx_hsspi_driver = {
-+ .driver = {
-+ .name = "bcm63xx-hsspi",
-+ .owner = THIS_MODULE,
-+ .pm = BCM63XX_HSSPI_PM_OPS,
-+ },
-+ .probe = bcm63xx_hsspi_probe,
-+ .remove = bcm63xx_hsspi_remove,
-+};
-+
-+module_platform_driver(bcm63xx_hsspi_driver);
-+
-+MODULE_ALIAS("platform:bcm63xx_hsspi");
-+MODULE_DESCRIPTION("Broadcom BCM63xx High Speed SPI Controller driver");
-+MODULE_AUTHOR("Jonas Gorski <jogo@openwrt.org>");
-+MODULE_LICENSE("GPL");