+++ /dev/null
-/* pikronisa.c
- * Linux CAN-bus device driver.
- * Written by Arnaud Westenberg email:arnaud@wanadoo.nl
- * Rewritten for new CAN queues by Pavel Pisa - OCERA team member
- * email:pisa@cmp.felk.cvut.cz
- * This software is released under the GPL-License.
- * Version lincan-0.3 17 Jun 2004
- */
-
-#include "../include/can.h"
-#include "../include/can_sysdep.h"
-#include "../include/main.h"
-#include "../include/pikronisa.h"
-#include "../include/sja1000p.h"
-
-/*
- * IO_RANGE is the io-memory range that gets reserved, please adjust according
- * your hardware. Example: #define IO_RANGE 0x100 for i82527 chips or
- * #define IO_RANGE 0x20 for sja1000 chips in basic CAN mode.
- */
-#define IO_RANGE 0x100
-
-/**
- * pikronisa_request_io: - reserve io or memory range for can board
- * @candev: pointer to candevice/board which asks for io. Field @io_addr
- * of @candev is used in most cases to define start of the range
- *
- * The function pikronisa_request_io() is used to reserve the io-memory. If your
- * hardware uses a dedicated memory range as hardware control registers you
- * will have to add the code to reserve this memory as well.
- * %IO_RANGE is the io-memory range that gets reserved, please adjust according
- * your hardware. Example: #define IO_RANGE 0x100 for i82527 chips or
- * #define IO_RANGE 0x20 for sja1000 chips in basic CAN mode.
- * Return Value: The function returns zero on success or %-ENODEV on failure
- * File: src/pikronisa.c
- */
-int pikronisa_request_io(struct candevice_t *candev)
-{
- can_ioptr_t remap_addr;
-
- if (!can_request_mem_region(candev->io_addr,IO_RANGE,DEVICE_NAME " - pikronisa")) {
- CANMSG("Unable to request IO-memory: 0x%lx\n",candev->io_addr);
- return -ENODEV;
- }
- if ( !( remap_addr = ioremap( candev->io_addr, IO_RANGE ) ) ) {
- CANMSG("Unable to access I/O memory at: 0x%lx\n", candev->io_addr);
- can_release_mem_region(candev->io_addr,IO_RANGE);
- return -ENODEV;
-
- }
- can_base_addr_fixup(candev, remap_addr);
- DEBUGMSG("Registered IO-memory: 0x%lx - 0x%lx\n", candev->io_addr, candev->io_addr + IO_RANGE - 1);
- return 0;
-}
-
-/**
- * pikronisa_elease_io - free reserved io memory range
- * @candev: pointer to candevice/board which releases io
- *
- * The function pikronisa_release_io() is used to free reserved io-memory.
- * In case you have reserved more io memory, don't forget to free it here.
- * IO_RANGE is the io-memory range that gets released, please adjust according
- * your hardware. Example: #define IO_RANGE 0x100 for i82527 chips or
- * #define IO_RANGE 0x20 for sja1000 chips in basic CAN mode.
- * Return Value: The function always returns zero
- * File: src/pikronisa.c
- */
-int pikronisa_release_io(struct candevice_t *candev)
-{
- /* release I/O memory mapping */
- iounmap(candev->dev_base_addr);
- can_release_mem_region(candev->io_addr,IO_RANGE);
-
- return 0;
-}
-
-/**
- * pikronisa_reset - hardware reset routine
- * @candev: Pointer to candevice/board structure
- *
- * The function pikronisa_reset() is used to give a hardware reset. This is
- * rather hardware specific so I haven't included example code. Don't forget to
- * check the reset status of the chip before returning.
- * Return Value: The function returns zero on success or %-ENODEV on failure
- * File: src/pikronisa.c
- */
-int pikronisa_reset(struct candevice_t *candev)
-{
- int i;
- struct canchip_t *chip=candev->chip[0];
- unsigned cdr;
-
- pikronisa_write_register(sjaMOD_RM, chip->chip_base_addr+SJAMOD);
- udelay(1000);
-
- cdr=pikronisa_read_register(chip->chip_base_addr+SJACDR);
- pikronisa_write_register(cdr|sjaCDR_PELICAN, chip->chip_base_addr+SJACDR);
-
- pikronisa_write_register(0, chip->chip_base_addr+SJAIER);
-
- i=20;
- pikronisa_write_register(0, chip->chip_base_addr+SJAMOD);
- while (pikronisa_read_register(chip->chip_base_addr+SJAMOD)&sjaMOD_RM){
- if(!i--) return -ENODEV;
- udelay(1000);
- pikronisa_write_register(0, chip->chip_base_addr+SJAMOD);
- }
-
- cdr=pikronisa_read_register(chip->chip_base_addr+SJACDR);
- pikronisa_write_register(cdr|sjaCDR_PELICAN, chip->chip_base_addr+SJACDR);
-
- pikronisa_write_register(0, chip->chip_base_addr+SJAIER);
-
- return 0;
-}
-
-#define RESET_ADDR 0x0
-#define NR_82527 0
-#define NR_SJA1000 1
-
-/**
- * pikronisa_init_hw_data - Initialize hardware cards
- * @candev: Pointer to candevice/board structure
- *
- * The function pikronisa_init_hw_data() is used to initialize the hardware
- * structure containing information about the installed CAN-board.
- * %RESET_ADDR represents the io-address of the hardware reset register.
- * %NR_82527 represents the number of intel 82527 chips on the board.
- * %NR_SJA1000 represents the number of philips sja1000 chips on the board.
- * The flags entry can currently only be %CANDEV_PROGRAMMABLE_IRQ to indicate that
- * the hardware uses programmable interrupts.
- * Return Value: The function always returns zero
- * File: src/pikronisa.c
- */
-int pikronisa_init_hw_data(struct candevice_t *candev)
-{
- candev->res_addr=RESET_ADDR;
- candev->nr_82527_chips=0;
- candev->nr_sja1000_chips=1;
- candev->nr_all_chips=1;
- candev->flags |= CANDEV_PROGRAMMABLE_IRQ*0;
-
- return 0;
-}
-
-/**
- * pikronisa_init_chip_data - Initialize chips
- * @candev: Pointer to candevice/board structure
- * @chipnr: Number of the CAN chip on the hardware card
- *
- * The function pikronisa_init_chip_data() is used to initialize the hardware
- * structure containing information about the CAN chips.
- * %CHIP_TYPE represents the type of CAN chip. %CHIP_TYPE can be "i82527" or
- * "sja1000".
- * The @chip_base_addr entry represents the start of the 'official' memory map
- * of the installed chip. It's likely that this is the same as the @io_addr
- * argument supplied at module loading time.
- * The @clock entry holds the chip clock value in Hz.
- * The entry @sja_cdr_reg holds hardware specific options for the Clock Divider
- * register. Options defined in the %sja1000.h file:
- * %sjaCDR_CLKOUT_MASK, %sjaCDR_CLK_OFF, %sjaCDR_RXINPEN, %sjaCDR_CBP, %sjaCDR_PELICAN
- * The entry @sja_ocr_reg holds hardware specific options for the Output Control
- * register. Options defined in the %sja1000.h file:
- * %sjaOCR_MODE_BIPHASE, %sjaOCR_MODE_TEST, %sjaOCR_MODE_NORMAL, %sjaOCR_MODE_CLOCK,
- * %sjaOCR_TX0_LH, %sjaOCR_TX1_ZZ.
- * The entry @int_clk_reg holds hardware specific options for the Clock Out
- * register. Options defined in the %i82527.h file:
- * %iCLK_CD0, %iCLK_CD1, %iCLK_CD2, %iCLK_CD3, %iCLK_SL0, %iCLK_SL1.
- * The entry @int_bus_reg holds hardware specific options for the Bus
- * Configuration register. Options defined in the %i82527.h file:
- * %iBUS_DR0, %iBUS_DR1, %iBUS_DT1, %iBUS_POL, %iBUS_CBY.
- * The entry @int_cpu_reg holds hardware specific options for the cpu interface
- * register. Options defined in the %i82527.h file:
- * %iCPU_CEN, %iCPU_MUX, %iCPU_SLP, %iCPU_PWD, %iCPU_DMC, %iCPU_DSC, %iCPU_RST.
- * Return Value: The function always returns zero
- * File: src/pikronisa.c
- */
-int pikronisa_init_chip_data(struct candevice_t *candev, int chipnr)
-{
- /*sja1000_fill_chipspecops(candev->chip[chipnr]);*/
- sja1000p_fill_chipspecops(candev->chip[chipnr]);
-
- candev->chip[chipnr]->chip_base_addr=candev->dev_base_addr;
- candev->chip[chipnr]->clock = 24000000;
- candev->chip[chipnr]->int_clk_reg = 0x0;
- candev->chip[chipnr]->int_bus_reg = 0x0;
- candev->chip[chipnr]->sja_cdr_reg = sjaCDR_CBP | sjaCDR_CLK_OFF;
- candev->chip[chipnr]->sja_ocr_reg = sjaOCR_MODE_NORMAL | sjaOCR_TX0_LH;
-
- return 0;
-}
-
-/**
- * pikronisa_init_obj_data - Initialize message buffers
- * @chip: Pointer to chip specific structure
- * @objnr: Number of the message buffer
- *
- * The function pikronisa_init_obj_data() is used to initialize the hardware
- * structure containing information about the different message objects on the
- * CAN chip. In case of the sja1000 there's only one message object but on the
- * i82527 chip there are 15.
- * The code below is for a i82527 chip and initializes the object base addresses
- * The entry @obj_base_addr represents the first memory address of the message
- * object. In case of the sja1000 @obj_base_addr is taken the same as the chips
- * base address.
- * Unless the hardware uses a segmented memory map, flags can be set zero.
- * Return Value: The function always returns zero
- * File: src/pikronisa.c
- */
-int pikronisa_init_obj_data(struct canchip_t *chip, int objnr)
-{
- chip->msgobj[objnr]->obj_base_addr=chip->chip_base_addr;
- return 0;
-}
-
-/**
- * pikronisa_program_irq - program interrupts
- * @candev: Pointer to candevice/board structure
- *
- * The function pikronisa_program_irq() is used for hardware that uses
- * programmable interrupts. If your hardware doesn't use programmable interrupts
- * you should not set the @candevices_t->flags entry to %CANDEV_PROGRAMMABLE_IRQ and
- * leave this function unedited. Again this function is hardware specific so
- * there's no example code.
- * Return value: The function returns zero on success or %-ENODEV on failure
- * File: src/pikronisa.c
- */
-int pikronisa_program_irq(struct candevice_t *candev)
-{
- return 0;
-}
-
-/**
- * pikronisa_write_register - Low level write register routine
- * @data: data to be written
- * @address: memory address to write to
- *
- * The function pikronisa_write_register() is used to write to hardware registers
- * on the CAN chip. You should only have to edit this function if your hardware
- * uses some specific write process.
- * Return Value: The function does not return a value
- * File: src/pikronisa.c
- */
-void pikronisa_write_register(unsigned data, can_ioptr_t address)
-{
- /*DEBUGMSG("pikronisa_write_register: addr=0x%lx data=0x%x",
- address,data);*/
- can_writeb(data,address);
-}
-
-/**
- * pikronisa_read_register - Low level read register routine
- * @address: memory address to read from
- *
- * The function pikronisa_read_register() is used to read from hardware registers
- * on the CAN chip. You should only have to edit this function if your hardware
- * uses some specific read process.
- * Return Value: The function returns the value stored in @address
- * File: src/pikronisa.c
- */
-unsigned pikronisa_read_register(can_ioptr_t address)
-{
- return can_readb(address);
-}
-
-/* !!! Don't change this function !!! */
-int pikronisa_register(struct hwspecops_t *hwspecops)
-{
- hwspecops->request_io = pikronisa_request_io;
- hwspecops->release_io = pikronisa_release_io;
- hwspecops->reset = pikronisa_reset;
- hwspecops->init_hw_data = pikronisa_init_hw_data;
- hwspecops->init_chip_data = pikronisa_init_chip_data;
- hwspecops->init_obj_data = pikronisa_init_obj_data;
- hwspecops->write_register = pikronisa_write_register;
- hwspecops->read_register = pikronisa_read_register;
- hwspecops->program_irq = pikronisa_program_irq;
- return 0;
-}
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