// SPDX-License-Identifier: GPL-2.0-or-later /* * Broadcom BCM63xx SPI controller support * * Copyright (C) 2009-2012 Florian Fainelli <[email protected]> * Copyright (C) 2010 Tanguy Bouzeloc <[email protected]> */ #include <linux/kernel.h> #include <linux/clk.h> #include <linux/io.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/spi/spi.h> #include <linux/completion.h> #include <linux/err.h> #include <linux/pm_runtime.h> #include <linux/of.h> #include <linux/reset.h> /* BCM 6338/6348 SPI core */ #define SPI_6348_RSET_SIZE … #define SPI_6348_CMD … #define SPI_6348_INT_STATUS … #define SPI_6348_INT_MASK_ST … #define SPI_6348_INT_MASK … #define SPI_6348_ST … #define SPI_6348_CLK_CFG … #define SPI_6348_FILL_BYTE … #define SPI_6348_MSG_TAIL … #define SPI_6348_RX_TAIL … #define SPI_6348_MSG_CTL … #define SPI_6348_MSG_CTL_WIDTH … #define SPI_6348_MSG_DATA … #define SPI_6348_MSG_DATA_SIZE … #define SPI_6348_RX_DATA … #define SPI_6348_RX_DATA_SIZE … /* BCM 3368/6358/6262/6368 SPI core */ #define SPI_6358_RSET_SIZE … #define SPI_6358_MSG_CTL … #define SPI_6358_MSG_CTL_WIDTH … #define SPI_6358_MSG_DATA … #define SPI_6358_MSG_DATA_SIZE … #define SPI_6358_RX_DATA … #define SPI_6358_RX_DATA_SIZE … #define SPI_6358_CMD … #define SPI_6358_INT_STATUS … #define SPI_6358_INT_MASK_ST … #define SPI_6358_INT_MASK … #define SPI_6358_ST … #define SPI_6358_CLK_CFG … #define SPI_6358_FILL_BYTE … #define SPI_6358_MSG_TAIL … #define SPI_6358_RX_TAIL … /* Shared SPI definitions */ /* Message configuration */ #define SPI_FD_RW … #define SPI_HD_W … #define SPI_HD_R … #define SPI_BYTE_CNT_SHIFT … #define SPI_6348_MSG_TYPE_SHIFT … #define SPI_6358_MSG_TYPE_SHIFT … /* Command */ #define SPI_CMD_NOOP … #define SPI_CMD_SOFT_RESET … #define SPI_CMD_HARD_RESET … #define SPI_CMD_START_IMMEDIATE … #define SPI_CMD_COMMAND_SHIFT … #define SPI_CMD_COMMAND_MASK … #define SPI_CMD_DEVICE_ID_SHIFT … #define SPI_CMD_PREPEND_BYTE_CNT_SHIFT … #define SPI_CMD_ONE_BYTE_SHIFT … #define SPI_CMD_ONE_WIRE_SHIFT … #define SPI_DEV_ID_0 … #define SPI_DEV_ID_1 … #define SPI_DEV_ID_2 … #define SPI_DEV_ID_3 … /* Interrupt mask */ #define SPI_INTR_CMD_DONE … #define SPI_INTR_RX_OVERFLOW … #define SPI_INTR_TX_UNDERFLOW … #define SPI_INTR_TX_OVERFLOW … #define SPI_INTR_RX_UNDERFLOW … #define SPI_INTR_CLEAR_ALL … /* Status */ #define SPI_RX_EMPTY … #define SPI_CMD_BUSY … #define SPI_SERIAL_BUSY … /* Clock configuration */ #define SPI_CLK_20MHZ … #define SPI_CLK_0_391MHZ … #define SPI_CLK_0_781MHZ … #define SPI_CLK_1_563MHZ … #define SPI_CLK_3_125MHZ … #define SPI_CLK_6_250MHZ … #define SPI_CLK_12_50MHZ … #define SPI_CLK_MASK … #define SPI_SSOFFTIME_MASK … #define SPI_SSOFFTIME_SHIFT … #define SPI_BYTE_SWAP … enum bcm63xx_regs_spi { … }; #define BCM63XX_SPI_MAX_PREPEND … #define BCM63XX_SPI_MAX_CS … #define BCM63XX_SPI_BUS_NUM … struct bcm63xx_spi { … }; static inline u8 bcm_spi_readb(struct bcm63xx_spi *bs, unsigned int offset) { … } static inline void bcm_spi_writeb(struct bcm63xx_spi *bs, u8 value, unsigned int offset) { … } static inline void bcm_spi_writew(struct bcm63xx_spi *bs, u16 value, unsigned int offset) { … } static const unsigned int bcm63xx_spi_freq_table[SPI_CLK_MASK][2] = …; static void bcm63xx_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t) { … } /* the spi->mode bits understood by this driver: */ #define MODEBITS … static int bcm63xx_txrx_bufs(struct spi_device *spi, struct spi_transfer *first, unsigned int num_transfers) { … } static int bcm63xx_spi_transfer_one(struct spi_controller *host, struct spi_message *m) { … } /* This driver supports single host mode only. Hence * CMD_DONE is the only interrupt we care about */ static irqreturn_t bcm63xx_spi_interrupt(int irq, void *dev_id) { … } static size_t bcm63xx_spi_max_length(struct spi_device *spi) { … } static const unsigned long bcm6348_spi_reg_offsets[] = …; static const unsigned long bcm6358_spi_reg_offsets[] = …; static const struct platform_device_id bcm63xx_spi_dev_match[] = …; static const struct of_device_id bcm63xx_spi_of_match[] = …; static int bcm63xx_spi_probe(struct platform_device *pdev) { … } static void bcm63xx_spi_remove(struct platform_device *pdev) { … } static int bcm63xx_spi_suspend(struct device *dev) { … } static int bcm63xx_spi_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(bcm63xx_spi_pm_ops, bcm63xx_spi_suspend, bcm63xx_spi_resume); static struct platform_driver bcm63xx_spi_driver = …; module_platform_driver(…) …; MODULE_ALIAS(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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