// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2010 - Maxim Levitsky * driver for Ricoh memstick readers */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/freezer.h> #include <linux/jiffies.h> #include <linux/interrupt.h> #include <linux/pci.h> #include <linux/pci_ids.h> #include <linux/delay.h> #include <linux/slab.h> #include <linux/kthread.h> #include <linux/sched.h> #include <linux/highmem.h> #include <asm/byteorder.h> #include <linux/swab.h> #include "r592.h" static bool r592_enable_dma = …; static int debug; static const char *tpc_names[] = …; /** * memstick_debug_get_tpc_name - debug helper that returns string for * a TPC number */ static __maybe_unused const char *memstick_debug_get_tpc_name(int tpc) { … } /* Read a register*/ static inline u32 r592_read_reg(struct r592_device *dev, int address) { … } /* Write a register */ static inline void r592_write_reg(struct r592_device *dev, int address, u32 value) { … } /* Reads a big endian DWORD register */ static inline u32 r592_read_reg_raw_be(struct r592_device *dev, int address) { … } /* Writes a big endian DWORD register */ static inline void r592_write_reg_raw_be(struct r592_device *dev, int address, u32 value) { … } /* Set specific bits in a register (little endian) */ static inline void r592_set_reg_mask(struct r592_device *dev, int address, u32 mask) { … } /* Clear specific bits in a register (little endian) */ static inline void r592_clear_reg_mask(struct r592_device *dev, int address, u32 mask) { … } /* Wait for status bits while checking for errors */ static int r592_wait_status(struct r592_device *dev, u32 mask, u32 wanted_mask) { … } /* Enable/disable device */ static int r592_enable_device(struct r592_device *dev, bool enable) { … } /* Set serial/parallel mode */ static int r592_set_mode(struct r592_device *dev, bool parallel_mode) { … } /* Perform a controller reset without powering down the card */ static void r592_host_reset(struct r592_device *dev) { … } #ifdef CONFIG_PM_SLEEP /* Disable all hardware interrupts */ static void r592_clear_interrupts(struct r592_device *dev) { … } #endif /* Tests if there is an CRC error */ static int r592_test_io_error(struct r592_device *dev) { … } /* Ensure that FIFO is ready for use */ static int r592_test_fifo_empty(struct r592_device *dev) { … } /* Activates the DMA transfer from to FIFO */ static void r592_start_dma(struct r592_device *dev, bool is_write) { … } /* Cleanups DMA related settings */ static void r592_stop_dma(struct r592_device *dev, int error) { … } /* Test if hardware supports DMA */ static void r592_check_dma(struct r592_device *dev) { … } /* Transfers fifo contents in/out using DMA */ static int r592_transfer_fifo_dma(struct r592_device *dev) { … } /* * Writes the FIFO in 4 byte chunks. * If length isn't 4 byte aligned, rest of the data if put to a fifo * to be written later * Use r592_flush_fifo_write to flush that fifo when writing for the * last time */ static void r592_write_fifo_pio(struct r592_device *dev, unsigned char *buffer, int len) { … } /* Flushes the temporary FIFO used to make aligned DWORD writes */ static void r592_flush_fifo_write(struct r592_device *dev) { … } /* * Read a fifo in 4 bytes chunks. * If input doesn't fit the buffer, it places bytes of last dword in spill * buffer, so that they don't get lost on last read, just throw these away. */ static void r592_read_fifo_pio(struct r592_device *dev, unsigned char *buffer, int len) { … } /* Transfers actual data using PIO. */ static int r592_transfer_fifo_pio(struct r592_device *dev) { … } /* Executes one TPC (data is read/written from small or large fifo) */ static void r592_execute_tpc(struct r592_device *dev) { … } /* Main request processing thread */ static int r592_process_thread(void *data) { … } /* Reprogram chip to detect change in card state */ /* eg, if card is detected, arm it to detect removal, and vice versa */ static void r592_update_card_detect(struct r592_device *dev) { … } /* Timer routine that fires 1 second after last card detection event, */ static void r592_detect_timer(struct timer_list *t) { … } /* Interrupt handler */ static irqreturn_t r592_irq(int irq, void *data) { … } /* External inteface: set settings */ static int r592_set_param(struct memstick_host *host, enum memstick_param param, int value) { … } /* External interface: submit requests */ static void r592_submit_req(struct memstick_host *host) { … } static const struct pci_device_id r592_pci_id_tbl[] = …; /* Main entry */ static int r592_probe(struct pci_dev *pdev, const struct pci_device_id *id) { … } static void r592_remove(struct pci_dev *pdev) { … } #ifdef CONFIG_PM_SLEEP static int r592_suspend(struct device *core_dev) { … } static int r592_resume(struct device *core_dev) { … } #endif static SIMPLE_DEV_PM_OPS(r592_pm_ops, r592_suspend, r592_resume); MODULE_DEVICE_TABLE(pci, r592_pci_id_tbl); static struct pci_driver r592_pci_driver = …; module_pci_driver(…) …; module_param_named(enable_dma, r592_enable_dma, bool, S_IRUGO); MODULE_PARM_DESC(…) …; module_param(debug, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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