/* * Broadcom BCM63XX High Speed SPI Controller driver * * Copyright 2000-2010 Broadcom Corporation * Copyright 2012-2013 Jonas Gorski <[email protected]> * * 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/mutex.h> #include <linux/of.h> #include <linux/spi/spi-mem.h> #include <linux/mtd/spi-nor.h> #include <linux/reset.h> #include <linux/pm_runtime.h> #define HSSPI_GLOBAL_CTRL_REG … #define GLOBAL_CTRL_CS_POLARITY_SHIFT … #define GLOBAL_CTRL_CS_POLARITY_MASK … #define GLOBAL_CTRL_PLL_CLK_CTRL_SHIFT … #define GLOBAL_CTRL_PLL_CLK_CTRL_MASK … #define GLOBAL_CTRL_CLK_GATE_SSOFF … #define GLOBAL_CTRL_CLK_POLARITY … #define GLOBAL_CTRL_MOSI_IDLE … #define HSSPI_GLOBAL_EXT_TRIGGER_REG … #define HSSPI_INT_STATUS_REG … #define HSSPI_INT_STATUS_MASKED_REG … #define HSSPI_INT_MASK_REG … #define HSSPI_PINGx_CMD_DONE(i) … #define HSSPI_PINGx_RX_OVER(i) … #define HSSPI_PINGx_TX_UNDER(i) … #define HSSPI_PINGx_POLL_TIMEOUT(i) … #define HSSPI_PINGx_CTRL_INVAL(i) … #define HSSPI_INT_CLEAR_ALL … #define HSSPI_PINGPONG_COMMAND_REG(x) … #define PINGPONG_CMD_COMMAND_MASK … #define PINGPONG_COMMAND_NOOP … #define PINGPONG_COMMAND_START_NOW … #define PINGPONG_COMMAND_START_TRIGGER … #define PINGPONG_COMMAND_HALT … #define PINGPONG_COMMAND_FLUSH … #define PINGPONG_CMD_PROFILE_SHIFT … #define PINGPONG_CMD_SS_SHIFT … #define HSSPI_PINGPONG_STATUS_REG(x) … #define HSSPI_PINGPONG_STATUS_SRC_BUSY … #define HSSPI_PROFILE_CLK_CTRL_REG(x) … #define CLK_CTRL_FREQ_CTRL_MASK … #define CLK_CTRL_SPI_CLK_2X_SEL … #define CLK_CTRL_ACCUM_RST_ON_LOOP … #define HSSPI_PROFILE_SIGNAL_CTRL_REG(x) … #define SIGNAL_CTRL_LATCH_RISING … #define SIGNAL_CTRL_LAUNCH_RISING … #define SIGNAL_CTRL_ASYNC_INPUT_PATH … #define HSSPI_PROFILE_MODE_CTRL_REG(x) … #define MODE_CTRL_MULTIDATA_RD_STRT_SHIFT … #define MODE_CTRL_MULTIDATA_WR_STRT_SHIFT … #define MODE_CTRL_MULTIDATA_RD_SIZE_SHIFT … #define MODE_CTRL_MULTIDATA_WR_SIZE_SHIFT … #define MODE_CTRL_MODE_3WIRE … #define MODE_CTRL_PREPENDBYTE_CNT_SHIFT … #define HSSPI_FIFO_REG(x) … #define HSSPI_OP_MULTIBIT … #define HSSPI_OP_CODE_SHIFT … #define HSSPI_OP_SLEEP … #define HSSPI_OP_READ_WRITE … #define HSSPI_OP_WRITE … #define HSSPI_OP_READ … #define HSSPI_OP_SETIRQ … #define HSSPI_BUFFER_LEN … #define HSSPI_OPCODE_LEN … #define HSSPI_MAX_PREPEND_LEN … /* * Some chip require 30MHz but other require 25MHz. Use smaller value to cover * both cases. */ #define HSSPI_MAX_SYNC_CLOCK … #define HSSPI_SPI_MAX_CS … #define HSSPI_BUS_NUM … #define HSSPI_POLL_STATUS_TIMEOUT_MS … #define HSSPI_WAIT_MODE_POLLING … #define HSSPI_WAIT_MODE_INTR … #define HSSPI_WAIT_MODE_MAX … /* * Default transfer mode is auto. If the msg is prependable, use the prepend * mode. If not, falls back to use the dummy cs workaround mode but limit the * clock to 25MHz to make sure it works in all board design. */ #define HSSPI_XFER_MODE_AUTO … #define HSSPI_XFER_MODE_PREPEND … #define HSSPI_XFER_MODE_DUMMYCS … #define HSSPI_XFER_MODE_MAX … #define bcm63xx_prepend_printk_on_checkfail(bs, fmt, ...) … struct bcm63xx_hsspi { … }; static ssize_t wait_mode_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t wait_mode_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(wait_mode); static ssize_t xfer_mode_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t xfer_mode_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(xfer_mode); static struct attribute *bcm63xx_hsspi_attrs[] = …; static const struct attribute_group bcm63xx_hsspi_group = …; static void bcm63xx_hsspi_set_clk(struct bcm63xx_hsspi *bs, struct spi_device *spi, int hz); static size_t bcm63xx_hsspi_max_message_size(struct spi_device *spi) { … } static int bcm63xx_hsspi_wait_cmd(struct bcm63xx_hsspi *bs) { … } static bool bcm63xx_prepare_prepend_transfer(struct spi_controller *host, struct spi_message *msg, struct spi_transfer *t_prepend) { … } static int bcm63xx_hsspi_do_prepend_txrx(struct spi_device *spi, struct spi_transfer *t) { … } static void bcm63xx_hsspi_set_cs(struct bcm63xx_hsspi *bs, unsigned int cs, bool active) { … } static void bcm63xx_hsspi_set_clk(struct bcm63xx_hsspi *bs, struct spi_device *spi, int hz) { … } static int bcm63xx_hsspi_do_txrx(struct spi_device *spi, struct spi_transfer *t) { … } static int bcm63xx_hsspi_setup(struct spi_device *spi) { … } static int bcm63xx_hsspi_do_dummy_cs_txrx(struct spi_device *spi, struct spi_message *msg) { … } static int bcm63xx_hsspi_transfer_one(struct spi_controller *host, struct spi_message *msg) { … } static bool bcm63xx_hsspi_mem_supports_op(struct spi_mem *mem, const struct spi_mem_op *op) { … } static const struct spi_controller_mem_ops bcm63xx_hsspi_mem_ops = …; static irqreturn_t bcm63xx_hsspi_interrupt(int irq, void *dev_id) { … } static int bcm63xx_hsspi_probe(struct platform_device *pdev) { … } static void bcm63xx_hsspi_remove(struct platform_device *pdev) { … } #ifdef CONFIG_PM_SLEEP static int bcm63xx_hsspi_suspend(struct device *dev) { … } static int bcm63xx_hsspi_resume(struct device *dev) { … } #endif static SIMPLE_DEV_PM_OPS(bcm63xx_hsspi_pm_ops, bcm63xx_hsspi_suspend, bcm63xx_hsspi_resume); static const struct of_device_id bcm63xx_hsspi_of_match[] = …; MODULE_DEVICE_TABLE(of, bcm63xx_hsspi_of_match); static struct platform_driver bcm63xx_hsspi_driver = …; module_platform_driver(…) …; MODULE_ALIAS(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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