// SPDX-License-Identifier: GPL-2.0-only /* * SPI driver for Nvidia's Tegra20 Serial Flash Controller. * * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. * * Author: Laxman Dewangan <[email protected]> */ #include <linux/clk.h> #include <linux/completion.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/kthread.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/reset.h> #include <linux/spi/spi.h> #define SPI_COMMAND … #define SPI_GO … #define SPI_M_S … #define SPI_ACTIVE_SCLK_MASK … #define SPI_ACTIVE_SCLK_DRIVE_LOW … #define SPI_ACTIVE_SCLK_DRIVE_HIGH … #define SPI_ACTIVE_SCLK_PULL_LOW … #define SPI_ACTIVE_SCLK_PULL_HIGH … #define SPI_CK_SDA_FALLING … #define SPI_CK_SDA_RISING … #define SPI_CK_SDA_MASK … #define SPI_ACTIVE_SDA … #define SPI_ACTIVE_SDA_DRIVE_LOW … #define SPI_ACTIVE_SDA_DRIVE_HIGH … #define SPI_ACTIVE_SDA_PULL_LOW … #define SPI_ACTIVE_SDA_PULL_HIGH … #define SPI_CS_POL_INVERT … #define SPI_TX_EN … #define SPI_RX_EN … #define SPI_CS_VAL_HIGH … #define SPI_CS_VAL_LOW … #define SPI_CS_SW … #define SPI_CS_HW … #define SPI_CS_DELAY_MASK … #define SPI_CS3_EN … #define SPI_CS2_EN … #define SPI_CS1_EN … #define SPI_CS0_EN … #define SPI_CS_MASK … #define SPI_BIT_LENGTH(x) … #define SPI_MODES … #define SPI_STATUS … #define SPI_BSY … #define SPI_RDY … #define SPI_TXF_FLUSH … #define SPI_RXF_FLUSH … #define SPI_RX_UNF … #define SPI_TX_OVF … #define SPI_RXF_EMPTY … #define SPI_RXF_FULL … #define SPI_TXF_EMPTY … #define SPI_TXF_FULL … #define SPI_BLK_CNT(count) … #define SPI_FIFO_ERROR … #define SPI_FIFO_EMPTY … #define SPI_RX_CMP … #define SPI_DMA_CTL … #define SPI_DMA_EN … #define SPI_IE_RXC … #define SPI_IE_TXC … #define SPI_PACKED … #define SPI_RX_TRIG_MASK … #define SPI_RX_TRIG_1W … #define SPI_RX_TRIG_4W … #define SPI_TX_TRIG_MASK … #define SPI_TX_TRIG_1W … #define SPI_TX_TRIG_4W … #define SPI_DMA_BLK_COUNT(count) … #define SPI_TX_FIFO … #define SPI_RX_FIFO … #define DATA_DIR_TX … #define DATA_DIR_RX … #define MAX_CHIP_SELECT … #define SPI_FIFO_DEPTH … #define SPI_DMA_TIMEOUT … struct tegra_sflash_data { … }; static int tegra_sflash_runtime_suspend(struct device *dev); static int tegra_sflash_runtime_resume(struct device *dev); static inline u32 tegra_sflash_readl(struct tegra_sflash_data *tsd, unsigned long reg) { … } static inline void tegra_sflash_writel(struct tegra_sflash_data *tsd, u32 val, unsigned long reg) { … } static void tegra_sflash_clear_status(struct tegra_sflash_data *tsd) { … } static unsigned tegra_sflash_calculate_curr_xfer_param( struct spi_device *spi, struct tegra_sflash_data *tsd, struct spi_transfer *t) { … } static unsigned tegra_sflash_fill_tx_fifo_from_client_txbuf( struct tegra_sflash_data *tsd, struct spi_transfer *t) { … } static int tegra_sflash_read_rx_fifo_to_client_rxbuf( struct tegra_sflash_data *tsd, struct spi_transfer *t) { … } static int tegra_sflash_start_cpu_based_transfer( struct tegra_sflash_data *tsd, struct spi_transfer *t) { … } static int tegra_sflash_start_transfer_one(struct spi_device *spi, struct spi_transfer *t, bool is_first_of_msg, bool is_single_xfer) { … } static int tegra_sflash_transfer_one_message(struct spi_controller *host, struct spi_message *msg) { … } static irqreturn_t handle_cpu_based_xfer(struct tegra_sflash_data *tsd) { … } static irqreturn_t tegra_sflash_isr(int irq, void *context_data) { … } static const struct of_device_id tegra_sflash_of_match[] = …; MODULE_DEVICE_TABLE(of, tegra_sflash_of_match); static int tegra_sflash_probe(struct platform_device *pdev) { … } static void tegra_sflash_remove(struct platform_device *pdev) { … } #ifdef CONFIG_PM_SLEEP static int tegra_sflash_suspend(struct device *dev) { … } static int tegra_sflash_resume(struct device *dev) { … } #endif static int tegra_sflash_runtime_suspend(struct device *dev) { … } static int tegra_sflash_runtime_resume(struct device *dev) { … } static const struct dev_pm_ops slink_pm_ops = …; static struct platform_driver tegra_sflash_driver = …; module_platform_driver(…) …; MODULE_ALIAS(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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