// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2010-2012 Stephane Grosjean <[email protected]> * * CAN driver for PEAK-System PCAN-PC Card * Derived from the PCAN project file driver/src/pcan_pccard.c * Copyright (C) 2006-2010 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/timer.h> #include <linux/io.h> #include <pcmcia/cistpl.h> #include <pcmcia/ds.h> #include <linux/can.h> #include <linux/can/dev.h> #include "sja1000.h" MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; /* PEAK-System PCMCIA driver name */ #define PCC_NAME … #define PCC_CHAN_MAX … #define PCC_CAN_CLOCK … #define PCC_MANF_ID … #define PCC_CARD_ID … #define PCC_CHAN_SIZE … #define PCC_CHAN_OFF(c) … #define PCC_COMN_OFF … #define PCC_COMN_SIZE … /* common area registers */ #define PCC_CCR … #define PCC_CSR … #define PCC_CPR … #define PCC_SPI_DIR … #define PCC_SPI_DOR … #define PCC_SPI_ADR … #define PCC_SPI_IR … #define PCC_FW_MAJOR … #define PCC_FW_MINOR … /* CCR bits */ #define PCC_CCR_CLK_16 … #define PCC_CCR_CLK_10 … #define PCC_CCR_CLK_21 … #define PCC_CCR_CLK_8 … #define PCC_CCR_CLK_MASK … #define PCC_CCR_RST_CHAN(c) … #define PCC_CCR_RST_ALL … #define PCC_CCR_RST_MASK … /* led selection bits */ #define PCC_LED(c) … #define PCC_LED_ALL … /* led state value */ #define PCC_LED_ON … #define PCC_LED_FAST … #define PCC_LED_SLOW … #define PCC_LED_OFF … #define PCC_CCR_LED_CHAN(s, c) … #define PCC_CCR_LED_ON_CHAN(c) … #define PCC_CCR_LED_FAST_CHAN(c) … #define PCC_CCR_LED_SLOW_CHAN(c) … #define PCC_CCR_LED_OFF_CHAN(c) … #define PCC_CCR_LED_MASK_CHAN(c) … #define PCC_CCR_LED_OFF_ALL … #define PCC_CCR_LED_MASK … #define PCC_CCR_INIT … /* CSR bits */ #define PCC_CSR_SPI_BUSY … /* time waiting for SPI busy (prevent from infinite loop) */ #define PCC_SPI_MAX_BUSY_WAIT_MS … /* max count of reading the SPI status register waiting for a change */ /* (prevent from infinite loop) */ #define PCC_WRITE_MAX_LOOP … /* max nb of int handled by that isr in one shot (prevent from infinite loop) */ #define PCC_ISR_MAX_LOOP … /* EEPROM chip instruction set */ /* note: EEPROM Read/Write instructions include A8 bit */ #define PCC_EEP_WRITE(a) … #define PCC_EEP_READ(a) … #define PCC_EEP_WRDI … #define PCC_EEP_RDSR … #define PCC_EEP_WREN … /* EEPROM Status Register bits */ #define PCC_EEP_SR_WEN … #define PCC_EEP_SR_WIP … /* * The board configuration is probably following: * RX1 is connected to ground. * TX1 is not connected. * CLKO is not connected. * Setting the OCR register to 0xDA is a good idea. * This means normal output mode, push-pull and the correct polarity. */ #define PCC_OCR … /* * In the CDR register, you should set CBP to 1. * You will probably also want to set the clock divider value to 7 * (meaning direct oscillator output) because the second SJA1000 chip * is driven by the first one CLKOUT output. */ #define PCC_CDR … struct pcan_channel { … }; /* PCAN-PC Card private structure */ struct pcan_pccard { … }; static struct pcmcia_device_id pcan_table[] = …; MODULE_DEVICE_TABLE(pcmcia, pcan_table); static void pcan_set_leds(struct pcan_pccard *card, u8 mask, u8 state); /* * start timer which controls leds state */ static void pcan_start_led_timer(struct pcan_pccard *card) { … } /* * stop the timer which controls leds state */ static void pcan_stop_led_timer(struct pcan_pccard *card) { … } /* * read a sja1000 register */ static u8 pcan_read_canreg(const struct sja1000_priv *priv, int port) { … } /* * write a sja1000 register */ static void pcan_write_canreg(const struct sja1000_priv *priv, int port, u8 v) { … } /* * read a register from the common area */ static u8 pcan_read_reg(struct pcan_pccard *card, int port) { … } /* * write a register into the common area */ static void pcan_write_reg(struct pcan_pccard *card, int port, u8 v) { … } /* * check whether the card is present by checking its fw version numbers * against values read at probing time. */ static inline int pcan_pccard_present(struct pcan_pccard *card) { … } /* * wait for SPI engine while it is busy */ static int pcan_wait_spi_busy(struct pcan_pccard *card) { … } /* * write data in device eeprom */ static int pcan_write_eeprom(struct pcan_pccard *card, u16 addr, u8 v) { … } static void pcan_set_leds(struct pcan_pccard *card, u8 led_mask, u8 state) { … } /* * enable/disable CAN connectors power */ static inline void pcan_set_can_power(struct pcan_pccard *card, int onoff) { … } /* * set leds state according to channel activity */ static void pcan_led_timer(struct timer_list *t) { … } /* * interrupt service routine */ static irqreturn_t pcan_isr(int irq, void *dev_id) { … } /* * free all resources used by the channels and switch off leds and can power */ static void pcan_free_channels(struct pcan_pccard *card) { … } /* * check if a CAN controller is present at the specified location */ static inline int pcan_channel_present(struct sja1000_priv *priv) { … } static int pcan_add_channels(struct pcan_pccard *card) { … } static int pcan_conf_check(struct pcmcia_device *pdev, void *priv_data) { … } /* * free all resources used by the device */ static void pcan_free(struct pcmcia_device *pdev) { … } /* * setup PCMCIA socket and probe for PEAK-System PC-CARD */ static int pcan_probe(struct pcmcia_device *pdev) { … } /* * release claimed resources */ static void pcan_remove(struct pcmcia_device *pdev) { … } static struct pcmcia_driver pcan_driver = …; module_pcmcia_driver(…);
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