// SPDX-License-Identifier: GPL-2.0-only /* * Copyright © 2009 - Maxim Levitsky * driver for Ricoh xD readers */ #define DRV_NAME … #define pr_fmt(fmt) … #include <linux/kernel.h> #include <linux/module.h> #include <linux/jiffies.h> #include <linux/workqueue.h> #include <linux/interrupt.h> #include <linux/pci.h> #include <linux/pci_ids.h> #include <linux/delay.h> #include <linux/slab.h> #include <asm/byteorder.h> #include <linux/sched.h> #include "sm_common.h" #include "r852.h" static bool r852_enable_dma = …; module_param(r852_enable_dma, bool, S_IRUGO); MODULE_PARM_DESC(…) …; static int debug; module_param(debug, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(…) …; /* read register */ static inline uint8_t r852_read_reg(struct r852_device *dev, int address) { … } /* write register */ static inline void r852_write_reg(struct r852_device *dev, int address, uint8_t value) { … } /* read dword sized register */ static inline uint32_t r852_read_reg_dword(struct r852_device *dev, int address) { … } /* write dword sized register */ static inline void r852_write_reg_dword(struct r852_device *dev, int address, uint32_t value) { … } /* returns pointer to our private structure */ static inline struct r852_device *r852_get_dev(struct mtd_info *mtd) { … } /* check if controller supports dma */ static void r852_dma_test(struct r852_device *dev) { … } /* * Enable dma. Enables ether first or second stage of the DMA, * Expects dev->dma_dir and dev->dma_state be set */ static void r852_dma_enable(struct r852_device *dev) { … } /* * Disable dma, called from the interrupt handler, which specifies * success of the operation via 'error' argument */ static void r852_dma_done(struct r852_device *dev, int error) { … } /* * Wait, till dma is done, which includes both phases of it */ static int r852_dma_wait(struct r852_device *dev) { … } /* * Read/Write one page using dma. Only pages can be read (512 bytes) */ static void r852_do_dma(struct r852_device *dev, uint8_t *buf, int do_read) { … } /* * Program data lines of the nand chip to send data to it */ static void r852_write_buf(struct nand_chip *chip, const uint8_t *buf, int len) { … } /* * Read data lines of the nand chip to retrieve data */ static void r852_read_buf(struct nand_chip *chip, uint8_t *buf, int len) { … } /* * Read one byte from nand chip */ static uint8_t r852_read_byte(struct nand_chip *chip) { … } /* * Control several chip lines & send commands */ static void r852_cmdctl(struct nand_chip *chip, int dat, unsigned int ctrl) { … } /* * Wait till card is ready. * based on nand_wait, but returns errors on DMA error */ static int r852_wait(struct nand_chip *chip) { … } /* * Check if card is ready */ static int r852_ready(struct nand_chip *chip) { … } /* * Set ECC engine mode */ static void r852_ecc_hwctl(struct nand_chip *chip, int mode) { … } /* * Calculate ECC, only used for writes */ static int r852_ecc_calculate(struct nand_chip *chip, const uint8_t *dat, uint8_t *ecc_code) { … } /* * Correct the data using ECC, hw did almost everything for us */ static int r852_ecc_correct(struct nand_chip *chip, uint8_t *dat, uint8_t *read_ecc, uint8_t *calc_ecc) { … } /* * This is copy of nand_read_oob_std * nand_read_oob_syndrome assumes we can send column address - we can't */ static int r852_read_oob(struct nand_chip *chip, int page) { … } /* * Start the nand engine */ static void r852_engine_enable(struct r852_device *dev) { … } /* * Stop the nand engine */ static void r852_engine_disable(struct r852_device *dev) { … } /* * Test if card is present */ static void r852_card_update_present(struct r852_device *dev) { … } /* * Update card detection IRQ state according to current card state * which is read in r852_card_update_present */ static void r852_update_card_detect(struct r852_device *dev) { … } static ssize_t media_type_show(struct device *sys_dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(media_type); /* Detect properties of card in slot */ static void r852_update_media_status(struct r852_device *dev) { … } /* * Register the nand device * Called when the card is detected */ static int r852_register_nand_device(struct r852_device *dev) { … } /* * Unregister the card */ static void r852_unregister_nand_device(struct r852_device *dev) { … } /* Card state updater */ static void r852_card_detect_work(struct work_struct *work) { … } /* Ack + disable IRQ generation */ static void r852_disable_irqs(struct r852_device *dev) { … } /* Interrupt handler */ static irqreturn_t r852_irq(int irq, void *data) { … } static int r852_attach_chip(struct nand_chip *chip) { … } static const struct nand_controller_ops r852_ops = …; static int r852_probe(struct pci_dev *pci_dev, const struct pci_device_id *id) { … } static void r852_remove(struct pci_dev *pci_dev) { … } static void r852_shutdown(struct pci_dev *pci_dev) { … } #ifdef CONFIG_PM_SLEEP static int r852_suspend(struct device *device) { … } static int r852_resume(struct device *device) { … } #endif static const struct pci_device_id r852_pci_id_tbl[] = …; MODULE_DEVICE_TABLE(pci, r852_pci_id_tbl); static SIMPLE_DEV_PM_OPS(r852_pm_ops, r852_suspend, r852_resume); static struct pci_driver r852_pci_driver = …; module_pci_driver(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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