/* pcccan.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 0.7 6 Aug 2001
+ * Version lincan-0.2 9 Jul 2003
*/
/* This file contains the low level functions for the pcccan-1 card from Gespac.
* You can probably find more information at http://www.gespac.com
*/
-#include <linux/autoconf.h>
-#if defined (CONFIG_MODVERSIONS) && !defined (MODVERSIONS)
-#define MODVERSIONS
-#endif
-
-#if defined (MODVERSIONS)
-#include <linux/modversions.h>
-#endif
-
-#include <linux/ioport.h>
-#include <linux/delay.h>
-#include <linux/sched.h>
-#include <asm/errno.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-
+#include "../include/can.h"
+#include "../include/can_sysdep.h"
#include "../include/main.h"
#include "../include/pcccan.h"
#include "../include/i82527.h"
int pcccan_irq=-1;
unsigned long pcccan_base=0x0;
+static can_spinlock_t pcccan_port_lock=SPIN_LOCK_UNLOCKED;
+
/*
* 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 0x8
/**
- * pcccan_request_io: - reserve io memory
- * @io_addr: The reserved memory starts at @io_addr, wich is the module
- * parameter @io.
+ * pcccan_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 pcccan_request_io() is used to reserve the io-memory. If your
* hardware uses a dedicated memory range as hardware control registers you
* Return Value: The function returns zero on success or %-ENODEV on failure
* File: src/pcccan.c
*/
-int pcccan_request_io(unsigned long io_addr)
+int pcccan_request_io(struct candevice_t *candev)
{
- if (check_region(io_addr,IO_RANGE)) {
- CANMSG("Unable to open port: 0x%lx\n",io_addr);
+ if (!can_request_io_region(candev->io_addr,IO_RANGE,DEVICE_NAME)) {
+ CANMSG("Unable to open port: 0x%lx\n",candev->io_addr);
return -ENODEV;
- }
- else {
- request_region(io_addr,IO_RANGE,DEVICE_NAME);
- DEBUGMSG("Registered IO-memory: 0x%lx - 0x%lx\n", io_addr, io_addr + IO_RANGE - 1);
+ } else {
+ DEBUGMSG("Registered IO-memory: 0x%lx - 0x%lx\n", candev->io_addr, candev->io_addr + IO_RANGE - 1);
}
return 0;
}
/**
- * pcccan_release_io - free reserved io-memory
- * @io_addr: Start of the memory range to be released.
+ * pcccan_elease_io - free reserved io memory range
+ * @candev: pointer to candevice/board which releases io
*
* The function pcccan_release_io() is used to free reserved io-memory.
* In case you have reserved more io memory, don't forget to free it here.
* Return Value: The function always returns zero
* File: src/pcccan.c
*/
-int pcccan_release_io(unsigned long io_addr)
+int pcccan_release_io(struct candevice_t *candev)
{
- release_region(io_addr,IO_RANGE);
+ can_release_io_region(candev->io_addr,IO_RANGE);
return 0;
}
/**
* pcccan_reset - hardware reset routine
- * @card: Number of the hardware card.
+ * @candev: Pointer to candevice/board structure
*
* The function pcccan_reset() is used to give a hardware reset. This is
* rather hardware specific so I haven't included example code. Don't forget to
* Return Value: The function returns zero on success or %-ENODEV on failure
* File: src/pcccan.c
*/
-int pcccan_reset(int card)
+int pcccan_reset(struct candevice_t *candev)
{
int i=0;
DEBUGMSG("Resetting pcccan-1 hardware ...\n");
while (i < 1000000) {
i++;
- outb(0x0,candevices_p[card]->res_addr);
+ outb(0x0,candev->res_addr);
}
/* Check hardware reset status */
i=0;
- outb(iCPU,candevices_p[card]->io_addr+0x1);
- while ( (inb(candevices_p[card]->io_addr+0x2)&0x80) && (i<=15) ) {
+ outb(iCPU,candev->io_addr+0x1);
+ while ( (inb(candev->io_addr+0x2)&0x80) && (i<=15) ) {
udelay(20000);
i++;
}
#define NR_SJA1000 0
/**
- * pcccan_init_hw_data - Initialze hardware cards
- * @card: Number of the hardware card.
+ * pcccan_init_hw_data - Initialize hardware cards
+ * @candev: Pointer to candevice/board structure
*
* The function pcccan_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 %PROGRAMMABLE_IRQ to indicate that
+ * 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/pcccan.c
*/
-int pcccan_init_hw_data(int card)
+int pcccan_init_hw_data(struct candevice_t *candev)
{
- candevices_p[card]->res_addr=candevices_p[card]->io_addr;
- candevices_p[card]->nr_82527_chips=NR_82527;
- candevices_p[card]->nr_sja1000_chips=NR_SJA1000;
- candevices_p[card]->flags |= ~PROGRAMMABLE_IRQ;
+ candev->res_addr=candev->io_addr;
+ candev->nr_82527_chips=NR_82527;
+ candev->nr_sja1000_chips=NR_SJA1000;
+ candev->nr_all_chips=NR_82527+NR_SJA1000;
+ candev->flags &= ~CANDEV_PROGRAMMABLE_IRQ;
return 0;
}
#define CHIP_TYPE "i82527"
/**
* pcccan_init_chip_data - Initialize chips
- * @card: Number of the hardware card
+ * @candev: Pointer to candevice/board structure
* @chipnr: Number of the CAN chip on the hardware card
*
* The function pcccan_init_chip_data() is used to initialize the hardware
* 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:
- * %CDR_CLKOUT_MASK, %CDR_CLK_OFF, %CDR_RXINPEN, %CDR_CBP, %CDR_PELICAN
+ * %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:
- * %OCR_MODE_BIPHASE, %OCR_MODE_TEST, %OCR_MODE_NORMAL, %OCR_MODE_CLOCK,
- * %OCR_TX0_LH, %OCR_TX1_ZZ.
+ * %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.
* Return Value: The function always returns zero
* File: src/pcccan.c
*/
-int pcccan_init_chip_data(int card, int chipnr)
+int pcccan_init_chip_data(struct candevice_t *candev, int chipnr)
{
- candevices_p[card]->chip[chipnr]->chip_type=CHIP_TYPE;
- candevices_p[card]->chip[chipnr]->chip_base_addr=candevices_p[card]->io_addr;
- candevices_p[card]->chip[chipnr]->clock = 16000000;
- candevices_p[card]->chip[chipnr]->int_cpu_reg = iCPU_DSC | iCPU_DMC;
- candevices_p[card]->chip[chipnr]->int_clk_reg = iCLK_SL1 | iCLK_CD0;
- candevices_p[card]->chip[chipnr]->int_bus_reg = iBUS_CBY | iBUS_DR1;
- candevices_p[card]->chip[chipnr]->sja_cdr_reg = 0;
- candevices_p[card]->chip[chipnr]->sja_ocr_reg = 0;
- pcccan_irq=candevices_p[card]->chip[chipnr]->chip_irq;
- pcccan_base=candevices_p[card]->chip[chipnr]->chip_base_addr;
+ candev->chip[chipnr]->chip_type=CHIP_TYPE;
+ candev->chip[chipnr]->chip_base_addr=candev->io_addr;
+ candev->chip[chipnr]->clock = 16000000;
+ candev->chip[chipnr]->int_cpu_reg = iCPU_DSC | iCPU_DMC;
+ candev->chip[chipnr]->int_clk_reg = iCLK_SL1 | iCLK_CD0;
+ candev->chip[chipnr]->int_bus_reg = iBUS_CBY | iBUS_DR1;
+ candev->chip[chipnr]->sja_cdr_reg = 0;
+ candev->chip[chipnr]->sja_ocr_reg = 0;
+ pcccan_irq=candev->chip[chipnr]->chip_irq;
+ pcccan_base=candev->chip[chipnr]->chip_base_addr;
return 0;
}
/**
* pcccan_init_obj_data - Initialize message buffers
- * @chipnr: Number of the CAN chip
+ * @chip: Pointer to chip specific structure
* @objnr: Number of the message buffer
*
* The function pcccan_init_obj_data() is used to initialize the hardware
* Return Value: The function always returns zero
* File: src/pcccan.c
*/
-int pcccan_init_obj_data(int chipnr, int objnr)
+int pcccan_init_obj_data(struct chip_t *chip, int objnr)
{
- chips_p[chipnr]->msgobj[objnr]->obj_base_addr=(objnr+1)*0x10;
- chips_p[chipnr]->msgobj[objnr]->flags=0;
+ chip->msgobj[objnr]->obj_base_addr=(objnr+1)*0x10;
return 0;
}
/**
* pcccan_program_irq - program interrupts
- * @card: Number of the hardware card.
+ * @candev: Pointer to candevice/board structure
*
* The function pcccan_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 %PROGRAMMABLE_IRQ and
+ * 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/pcccan.c
*/
-int pcccan_program_irq(int card)
+int pcccan_program_irq(struct candevice_t *candev)
{
return 0;
}
* Return Value: The function does not return a value
* File: src/pcccan.c
*/
-void pcccan_write_register(unsigned char data, unsigned long address)
+void pcccan_write_register(unsigned data, unsigned long address)
{
- disable_irq(pcccan_irq);
+ can_spin_irqflags_t flags;
+ can_spin_lock_irqsave(&pcccan_port_lock,flags);
outb(address - pcccan_base, pcccan_base+1);
outb(data, pcccan_base+6);
- enable_irq(pcccan_irq);
+ can_spin_unlock_irqrestore(&pcccan_port_lock,flags);
}
/**
unsigned pcccan_read_register(unsigned long address)
{
unsigned ret;
- disable_irq(pcccan_irq);
+ can_spin_irqflags_t flags;
+ can_spin_lock_irqsave(&pcccan_port_lock,flags);
outb(address - pcccan_base, pcccan_base+1);
ret=inb(pcccan_base+2);
- enable_irq(pcccan_irq);
+ can_spin_unlock_irqrestore(&pcccan_port_lock,flags);
return ret;
}
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