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path: root/target/linux/brcm63xx/patches-3.7/426-SPI-MIPS-BCM63XX-Add-HS-SPI-driver.patch
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Diffstat (limited to 'target/linux/brcm63xx/patches-3.7/426-SPI-MIPS-BCM63XX-Add-HS-SPI-driver.patch')
-rw-r--r--target/linux/brcm63xx/patches-3.7/426-SPI-MIPS-BCM63XX-Add-HS-SPI-driver.patch481
1 files changed, 0 insertions, 481 deletions
diff --git a/target/linux/brcm63xx/patches-3.7/426-SPI-MIPS-BCM63XX-Add-HS-SPI-driver.patch b/target/linux/brcm63xx/patches-3.7/426-SPI-MIPS-BCM63XX-Add-HS-SPI-driver.patch
deleted file mode 100644
index 2b213968a1..0000000000
--- a/target/linux/brcm63xx/patches-3.7/426-SPI-MIPS-BCM63XX-Add-HS-SPI-driver.patch
+++ /dev/null
@@ -1,481 +0,0 @@
-From 4b27423676485d05bcd6fc6f3809164fb8f9d22d Mon Sep 17 00:00:00 2001
-From: Jonas Gorski <jonas.gorski@gmail.com>
-Date: Sat, 12 Nov 2011 12:19:55 +0100
-Subject: [PATCH 30/60] SPI: MIPS: BCM63XX: Add HSSPI driver
-
-Add a driver for the High Speed SPI controller found on newer BCM63XX SoCs.
-
-Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
----
- .../include/asm/mach-bcm63xx/bcm63xx_dev_hsspi.h | 2 +
- drivers/spi/Kconfig | 7 +
- drivers/spi/Makefile | 1 +
- drivers/spi/spi-bcm63xx-hsspi.c | 427 ++++++++++++++++++++
- 4 files changed, 437 insertions(+), 0 deletions(-)
- create mode 100644 drivers/spi/spi-bcm63xx-hsspi.c
-
---- a/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_hsspi.h
-+++ b/arch/mips/include/asm/mach-bcm63xx/bcm63xx_dev_hsspi.h
-@@ -17,4 +17,6 @@ struct bcm63xx_hsspi_pdata {
-
- #define HSSPI_PLL_HZ_6328 133333333
-
-+#define HSSPI_BUFFER_LEN 512
-+
- #endif /* BCM63XX_DEV_HSSPI_H */
---- a/drivers/spi/Kconfig
-+++ b/drivers/spi/Kconfig
-@@ -100,6 +100,13 @@ 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
-+ 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
-@@ -15,6 +15,7 @@ obj-$(CONFIG_SPI_ATMEL) += spi-atmel.o
- obj-$(CONFIG_SPI_ATH79) += spi-ath79.o
- obj-$(CONFIG_SPI_AU1550) += spi-au1550.o
- obj-$(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 +1,427 @@
-+/*
-+ * Broadcom BCM63XX High Speed SPI Controller driver
-+ *
-+ * Copyright 2000-2010 Broadcom Corporation
-+ * Copyright 2012 Jonas Gorski <jonas.gorski@gmail.com>
-+ *
-+ * 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 <bcm63xx_regs.h>
-+#include <bcm63xx_dev_hsspi.h>
-+
-+#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_MAX_PREPEND_LEN 15
-+
-+#define HSSPI_MAX_SYNC_CLOCK 30000000
-+
-+struct bcm63xx_hsspi {
-+ struct completion done;
-+ struct spi_transfer *curr_trans;
-+
-+ struct platform_device *pdev;
-+ struct clk *clk;
-+ void __iomem *regs;
-+ u8 __iomem *fifo;
-+
-+ u32 speed_hz;
-+ int irq;
-+};
-+
-+static void bcm63xx_hsspi_set_clk(struct bcm63xx_hsspi *bs, int hz,
-+ int profile)
-+{
-+ u32 reg;
-+
-+ reg = DIV_ROUND_UP(2048, DIV_ROUND_UP(bs->speed_hz, hz));
-+ bcm_hsspi_writel(CLK_CTRL_ACCUM_RST_ON_LOOP | reg,
-+ HSSPI_PROFILE_CLK_CTRL_REG(profile));
-+
-+ reg = bcm_hsspi_readl(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;
-+ bcm_hsspi_writel(reg, HSSPI_PROFILE_SIGNAL_CTRL_REG(profile));
-+}
-+
-+static int bcm63xx_hsspi_do_txrx(struct spi_device *spi,
-+ struct spi_transfer *t1,
-+ struct spi_transfer *t2)
-+{
-+ struct bcm63xx_hsspi *bs = spi_master_get_devdata(spi->master);
-+ u8 chip_select = spi->chip_select;
-+ u16 opcode = 0;
-+ int len, prepend_size = 0;
-+
-+ init_completion(&bs->done);
-+
-+ bs->curr_trans = t2 ? t2 : t1;
-+ bcm63xx_hsspi_set_clk(bs, bs->curr_trans->speed_hz, chip_select);
-+
-+ if (t2 && !t2->tx_buf)
-+ prepend_size = t1->len;
-+
-+ bcm_hsspi_writel(prepend_size << MODE_CTRL_PREPENDBYTE_CNT_SHIFT |
-+ 2 << MODE_CTRL_MULTIDATA_WR_STRT_SHIFT |
-+ 2 << MODE_CTRL_MULTIDATA_RD_STRT_SHIFT | 0xff,
-+ HSSPI_PROFILE_MODE_CTRL_REG(chip_select));
-+
-+ if (t1->rx_buf && t1->tx_buf)
-+ opcode = HSSPI_OP_READ_WRITE;
-+ else if (t1->rx_buf || (t2 && t2->rx_buf))
-+ opcode = HSSPI_OP_READ;
-+ else if (t1->tx_buf)
-+ opcode = HSSPI_OP_WRITE;
-+
-+ if (opcode == HSSPI_OP_READ && t2)
-+ len = t2->len;
-+ else
-+ len = t1->len;
-+
-+ if (t1->tx_buf) {
-+ memcpy_toio(bs->fifo + 2, t1->tx_buf, t1->len);
-+ if (t2 && t2->tx_buf) {
-+ memcpy_toio(bs->fifo + 2 + t1->len,
-+ t2->tx_buf, t2->len);
-+ len += t2->len;
-+ }
-+ }
-+
-+ opcode |= len;
-+ memcpy_toio(bs->fifo, &opcode, sizeof(opcode));
-+
-+ /* enable interrupt */
-+ bcm_hsspi_writel(HSSPI_PING0_CMD_DONE, HSSPI_INT_MASK_REG);
-+
-+ /* start the transfer */
-+ bcm_hsspi_writel(chip_select << PINGPONG_CMD_SS_SHIFT |
-+ chip_select << PINGPONG_CMD_PROFILE_SHIFT |
-+ PINGPONG_COMMAND_START_NOW,
-+ 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;
-+ }
-+
-+ return t1->len + (t2 ? t2->len : 0);
-+}
-+
-+static int bcm63xx_hsspi_setup(struct spi_device *spi)
-+{
-+ u32 reg;
-+
-+ if (spi->bits_per_word != 8)
-+ return -EINVAL;
-+
-+ if (spi->max_speed_hz == 0)
-+ return -EINVAL;
-+
-+ reg = bcm_hsspi_readl(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;
-+ bcm_hsspi_writel(reg, HSSPI_PROFILE_SIGNAL_CTRL_REG(spi->chip_select));
-+
-+ return 0;
-+}
-+
-+static int bcm63xx_hsspi_transfer_one(struct spi_master *master,
-+ struct spi_message *msg)
-+{
-+ struct spi_transfer *t, *prev = NULL;
-+ struct spi_device *spi = msg->spi;
-+ u32 reg;
-+ int ret = -EINVAL;
-+ int len = 0;
-+
-+ /* check if we are able to make these transfers */
-+ list_for_each_entry(t, &msg->transfers, transfer_list) {
-+ if (!t->tx_buf && !t->rx_buf)
-+ goto out;
-+
-+ if (t->speed_hz == 0)
-+ t->speed_hz = spi->max_speed_hz;
-+
-+ if (t->speed_hz > spi->max_speed_hz)
-+ goto out;
-+
-+ if (t->len > HSSPI_BUFFER_LEN)
-+ goto out;
-+
-+ /*
-+ * This controller does not support keeping the chip select
-+ * active between transfers.
-+ * This logic currently supports combining:
-+ * write then read with no cs_change (e.g. m25p80 RDSR)
-+ * write then write with no cs_change (e.g. m25p80 PP)
-+ */
-+ if (prev && prev->tx_buf && !prev->cs_change && !t->cs_change) {
-+ /*
-+ * reject if we have to combine two tx transfers and
-+ * their combined length is bigger than the buffer
-+ */
-+ if (prev->tx_buf && t->tx_buf &&
-+ (prev->len + t->len) > HSSPI_BUFFER_LEN)
-+ goto out;
-+ /*
-+ * reject if we need write more than 15 bytes in read
-+ * then write.
-+ */
-+ if (prev->tx_buf && t->rx_buf &&
-+ prev->len > HSSPI_MAX_PREPEND_LEN)
-+ goto out;
-+ }
-+
-+ }
-+
-+ /* setup clock polarity */
-+ reg = bcm_hsspi_readl(HSSPI_GLOBAL_CTRL_REG);
-+ reg &= ~GLOBAL_CTRL_CLK_POLARITY;
-+ if (spi->mode & SPI_CPOL)
-+ reg |= GLOBAL_CTRL_CLK_POLARITY;
-+ bcm_hsspi_writel(reg, HSSPI_GLOBAL_CTRL_REG);
-+
-+ list_for_each_entry(t, &msg->transfers, transfer_list) {
-+ if (prev && prev->tx_buf && !prev->cs_change && !t->cs_change) {
-+ /* combine write with following transfer */
-+ ret = bcm63xx_hsspi_do_txrx(msg->spi, prev, t);
-+ if (ret < 0)
-+ goto out;
-+
-+ len += ret;
-+ prev = NULL;
-+ continue;
-+ }
-+
-+ /* write the previous pending transfer */
-+ if (prev != NULL) {
-+ ret = bcm63xx_hsspi_do_txrx(msg->spi, prev, NULL);
-+ if (ret < 0)
-+ goto out;
-+
-+ len += ret;
-+ }
-+
-+ prev = t;
-+ }
-+
-+ /* do last pending transfer */
-+ if (prev != NULL) {
-+ ret = bcm63xx_hsspi_do_txrx(msg->spi, prev, NULL);
-+ if (ret < 0)
-+ goto out;
-+ len += ret;
-+ }
-+
-+ msg->actual_length = len;
-+ ret = 0;
-+out:
-+ msg->status = ret;
-+ spi_finalize_current_message(master);
-+ return 0;
-+}
-+
-+static irqreturn_t bcm63xx_hsspi_interrupt(int irq, void *dev_id)
-+{
-+ struct spi_master *master = (struct spi_master *)dev_id;
-+ struct bcm63xx_hsspi *bs = spi_master_get_devdata(master);
-+
-+ if (bcm_hsspi_readl(HSSPI_INT_STATUS_MASKED_REG) == 0)
-+ return IRQ_NONE;
-+
-+ bcm_hsspi_writel(HSSPI_INT_CLEAR_ALL, HSSPI_INT_STATUS_REG);
-+ bcm_hsspi_writel(0, HSSPI_INT_MASK_REG);
-+
-+ if (bs->curr_trans && bs->curr_trans->rx_buf)
-+ memcpy_fromio(bs->curr_trans->rx_buf, bs->fifo,
-+ bs->curr_trans->len);
-+ complete(&bs->done);
-+
-+ return IRQ_HANDLED;
-+}
-+
-+static int __devinit 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 bcm63xx_hsspi_pdata *pdata = pdev->dev.platform_data;
-+ struct clk *clk;
-+ int irq;
-+ int ret;
-+
-+ 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 (!regs) {
-+ dev_err(dev, "unable to ioremap regs\n");
-+ return -ENXIO;
-+ }
-+
-+ clk = clk_get(dev, "hsspi");
-+
-+ if (IS_ERR(clk)) {
-+ ret = PTR_ERR(clk);
-+ goto out_release;
-+ }
-+
-+ 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;
-+
-+ master->bus_num = pdata->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;
-+
-+ bs->speed_hz = pdata->speed_hz;
-+ bs->fifo = (u8 __iomem *)(bs->regs + HSSPI_FIFO_REG(0));
-+
-+ platform_set_drvdata(pdev, master);
-+
-+ bs->curr_trans = NULL;
-+
-+ /* Initialize the hardware */
-+ bcm_hsspi_writel(0, HSSPI_INT_MASK_REG);
-+
-+ /* clean up any pending interrupts */
-+ bcm_hsspi_writel(HSSPI_INT_CLEAR_ALL, HSSPI_INT_STATUS_REG);
-+
-+ bcm_hsspi_writel(bcm_hsspi_readl(HSSPI_GLOBAL_CTRL_REG) |
-+ GLOBAL_CTRL_CLK_GATE_SSOFF,
-+ HSSPI_GLOBAL_CTRL_REG);
-+
-+ ret = devm_request_irq(dev, irq, bcm63xx_hsspi_interrupt, IRQF_SHARED,
-+ pdev->name, master);
-+
-+ if (ret)
-+ goto out_put_master;
-+
-+ /* register and we are done */
-+ ret = spi_register_master(master);
-+ if (ret)
-+ goto out_free_irq;
-+
-+ return 0;
-+
-+out_free_irq:
-+ devm_free_irq(dev, bs->irq, master);
-+out_put_master:
-+ spi_master_put(master);
-+out_disable_clk:
-+ clk_disable_unprepare(clk);
-+ clk_put(clk);
-+out_release:
-+ devm_ioremap_release(dev, regs);
-+
-+ return ret;
-+}
-+
-+
-+static int __exit 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 */
-+ bcm_hsspi_writel(0, HSSPI_INT_MASK_REG);
-+ clk_disable_unprepare(bs->clk);
-+ clk_put(bs->clk);
-+
-+ return 0;
-+}
-+
-+#ifdef CONFIG_PM
-+static int bcm63xx_hsspi_suspend(struct platform_device *pdev,
-+ pm_message_t mesg)
-+{
-+ struct spi_master *master = platform_get_drvdata(pdev);
-+ 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 platform_device *pdev)
-+{
-+ struct spi_master *master = platform_get_drvdata(pdev);
-+ 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 = __exit_p(bcm63xx_hsspi_remove),
-+};
-+
-+module_platform_driver(bcm63xx_hsspi_driver);
-+
-+MODULE_ALIAS("platform:bcm63xx_hsspi");
-+MODULE_DESCRIPTION("Broadcom BCM63xx HS SPI Controller driver");
-+MODULE_AUTHOR("Jonas Gorski <jonas.gorski@gmail.com>");
-+MODULE_LICENSE("GPL");
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