// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2007, 2011 Wolfgang Grandegger <[email protected]> * Copyright (C) 2012 Stephane Grosjean <[email protected]> * * Derived from the PCAN project file driver/src/pcan_pci.c: * * Copyright (C) 2001-2006 PEAK System-Technik GmbH */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/netdevice.h> #include <linux/delay.h> #include <linux/pci.h> #include <linux/io.h> #include <linux/i2c.h> #include <linux/i2c-algo-bit.h> #include <linux/can.h> #include <linux/can/dev.h> #include "sja1000.h" MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; #define DRV_NAME … /* FPGA cards FW version registers */ #define PEAK_VER_REG1 … #define PEAK_VER_REG2 … struct peak_pciec_card; struct peak_pci_chan { … }; #define PEAK_PCI_CAN_CLOCK … #define PEAK_PCI_CDR … #define PEAK_PCI_OCR … /* Important PITA registers */ #define PITA_ICR … #define PITA_GPIOICR … #define PITA_MISC … #define PEAK_PCI_CFG_SIZE … #define PEAK_PCI_CHAN_SIZE … #define PEAK_PCI_VENDOR_ID … #define PEAK_PCI_DEVICE_ID … #define PEAK_PCIEC_DEVICE_ID … #define PEAK_PCIE_DEVICE_ID … #define PEAK_CPCI_DEVICE_ID … #define PEAK_MPCI_DEVICE_ID … #define PEAK_PC_104P_DEVICE_ID … #define PEAK_PCI_104E_DEVICE_ID … #define PEAK_MPCIE_DEVICE_ID … #define PEAK_PCIE_OEM_ID … #define PEAK_PCIEC34_DEVICE_ID … #define PEAK_PCI_CHAN_MAX … static const u16 peak_pci_icr_masks[PEAK_PCI_CHAN_MAX] = …; static const struct pci_device_id peak_pci_tbl[] = …; MODULE_DEVICE_TABLE(pci, peak_pci_tbl); #ifdef CONFIG_CAN_PEAK_PCIEC /* PCAN-ExpressCard needs I2C bit-banging configuration option. */ /* GPIOICR byte access offsets */ #define PITA_GPOUT … #define PITA_GPIN … #define PITA_GPOEN … /* I2C GP bits */ #define PITA_GPIN_SCL … #define PITA_GPIN_SDA … #define PCA9553_1_SLAVEADDR … /* PCA9553 LS0 fields values */ enum { … }; /* LEDs control */ #define PCA9553_ON … #define PCA9553_OFF … #define PCA9553_SLOW … #define PCA9553_FAST … #define PCA9553_LED(c) … #define PCA9553_LED_STATE(s, c) … #define PCA9553_LED_ON(c) … #define PCA9553_LED_OFF(c) … #define PCA9553_LED_SLOW(c) … #define PCA9553_LED_FAST(c) … #define PCA9553_LED_MASK(c) … #define PCA9553_LED_OFF_ALL … #define PCA9553_LS0_INIT … struct peak_pciec_chan { … }; struct peak_pciec_card { … }; /* "normal" pci register write callback is overloaded for leds control */ static void peak_pci_write_reg(const struct sja1000_priv *priv, int port, u8 val); static inline void pita_set_scl_highz(struct peak_pciec_card *card) { … } static inline void pita_set_sda_highz(struct peak_pciec_card *card) { … } static void peak_pciec_init_pita_gpio(struct peak_pciec_card *card) { … } static void pita_setsda(void *data, int state) { … } static void pita_setscl(void *data, int state) { … } static int pita_getsda(void *data) { … } static int pita_getscl(void *data) { … } /* write commands to the LED chip though the I2C-bus of the PCAN-PCIeC */ static int peak_pciec_write_pca9553(struct peak_pciec_card *card, u8 offset, u8 data) { … } /* delayed work callback used to control the LEDs */ static void peak_pciec_led_work(struct work_struct *work) { … } /* set LEDs blinking state */ static void peak_pciec_set_leds(struct peak_pciec_card *card, u8 led_mask, u8 s) { … } /* start one second delayed work to control LEDs */ static void peak_pciec_start_led_work(struct peak_pciec_card *card) { … } /* stop LEDs delayed work */ static void peak_pciec_stop_led_work(struct peak_pciec_card *card) { … } /* initialize the PCA9553 4-bit I2C-bus LED chip */ static int peak_pciec_init_leds(struct peak_pciec_card *card) { … } /* restore LEDs state to off peak_pciec_leds_exit */ static void peak_pciec_leds_exit(struct peak_pciec_card *card) { … } /* normal write sja1000 register method overloaded to catch when controller * is started or stopped, to control leds */ static void peak_pciec_write_reg(const struct sja1000_priv *priv, int port, u8 val) { … } static const struct i2c_algo_bit_data peak_pciec_i2c_bit_ops = …; static int peak_pciec_probe(struct pci_dev *pdev, struct net_device *dev) { … } static void peak_pciec_remove(struct peak_pciec_card *card) { … } #else /* CONFIG_CAN_PEAK_PCIEC */ /* Placebo functions when PCAN-ExpressCard support is not selected */ static inline int peak_pciec_probe(struct pci_dev *pdev, struct net_device *dev) { return -ENODEV; } static inline void peak_pciec_remove(struct peak_pciec_card *card) { } #endif /* CONFIG_CAN_PEAK_PCIEC */ static u8 peak_pci_read_reg(const struct sja1000_priv *priv, int port) { … } static void peak_pci_write_reg(const struct sja1000_priv *priv, int port, u8 val) { … } static void peak_pci_post_irq(const struct sja1000_priv *priv) { … } static int peak_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { … } static void peak_pci_remove(struct pci_dev *pdev) { … } static struct pci_driver peak_pci_driver = …; module_pci_driver(…) …;
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