/* pcm3680.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-0.3 17 Jun 2004
*/
-#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 <asm/errno.h>
-#include <asm/io.h>
-
+#include "../include/can.h"
+#include "../include/can_sysdep.h"
#include "../include/main.h"
#include "../include/pcm3680.h"
#include "../include/i82527.h"
#include "../include/sja1000p.h"
-/* Basic hardware io address. This is also stored in the hardware structure but
- * we need it global, else we have to change many internal functions.
- * pcm3680_base_addr is initialized in pcm3680_init_chip_data().
- */
-unsigned int pcm3680_base_addr;
-
/*
* 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 0x200
+#define IO_RANGE 0x400
/**
- * template_request_io: - reserve io memory
- * @io_addr: The reserved memory starts at @io_addr, wich is the module
- * parameter @io.
+ * template_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 template_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/template.c
*/
-int pcm3680_request_io(unsigned long io_addr)
+int pcm3680_request_io(struct candevice_t *candev)
{
- if (check_region(io_addr,IO_RANGE)) {
- CANMSG("Unable to open port: 0x%lx\n",io_addr);
+ unsigned long remap_addr;
+ if (!can_request_mem_region(candev->io_addr,IO_RANGE,DEVICE_NAME " - pcm3680")) {
+ CANMSG("Unable to request IO-memory: 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);
+ if ( !( remap_addr = (long) 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;
}
/**
- * template_release_io - free reserved io-memory
- * @io_addr: Start of the memory range to be released.
+ * template_release_io - free reserved io memory range
+ * @candev: pointer to candevice/board which releases io
*
* The function template_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/template.c
*/
-int pcm3680_release_io(unsigned long io_addr)
+int pcm3680_release_io(struct candevice_t *candev)
{
- release_region(io_addr,IO_RANGE);
-
+ iounmap((void*)candev->dev_base_addr);
+ can_release_mem_region(candev->io_addr,IO_RANGE);
return 0;
}
/**
* template_reset - hardware reset routine
- * @card: Number of the hardware card.
+ * @candev: Pointer to candevice/board structure
*
* The function template_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/template.c
*/
-int pcm3680_reset(int card)
+int pcm3680_reset(struct candevice_t *candev)
{
-// int i=0;
-
-// DEBUGMSG("Resetting pcm3680 hardware ...\n");
-// pcm3680_write_register(0x01, candevices_p[card]->io_addr +
-// 0x100); // Write arbitrary data to reset mem
-// pcm3680_write_register(0x01, candevices_p[card]->io_addr +
-// 0x300); // Write arbitrary data to reset mem
-// udelay(20000);
-
-// pcm3680_write_register(0x00, candevices_p[card]->io_addr + SJACR);
-// pcm3680_write_register(0x00, candevices_p[card]->io_addr + SJACR+0x200);
-
- /* Check hardware reset status chip 0 */
-/* i=0;
- while ( (pcm3680_read_register(candevices_p[card]->io_addr + SJACR)
- & CR_RR) && (i<=15) ) {
- udelay(20000);
- i++;
- }
- if (i>=15) {
- CANMSG("Reset status timeout!\n");
- CANMSG("Please check your hardware.\n");
- return -ENODEV;
- }
- else
- DEBUGMSG("Chip[0] reset status ok.\n");
-*/
- /* Check hardware reset status chip 1 */
-/* i=0;
- while ( (pcm3680_read_register( candevices_p[card]->io_addr + SJACR +
- 0x200) & CR_RR) && (i<=15) ) {
- udelay(20000);
- i++;
- }
- if (i>=15) {
- CANMSG("Reset status timeout!\n");
- CANMSG("Please check your hardware.\n");
- return -ENODEV;
+ int i=0;
+ struct chip_t *chip;
+ int chipnr;
+
+ DEBUGMSG("Resetting pcm3680 hardware ...\n");
+ for(chipnr=0;chipnr<candev->nr_sja1000_chips;chipnr++) {
+ chip=candev->chip[chipnr];
+ pcm3680_write_register(sjaMOD_RM, chip->chip_base_addr+SJAMOD);
+ udelay(1000);
+ pcm3680_write_register(0x00, chip->chip_base_addr + SJAIER);
+ /* Write arbitrary data to reset chip */
+ pcm3680_write_register(0x01, chip->chip_base_addr + 0x100);
+ udelay(1000);
+ i=20;
+ while (pcm3680_read_register(chip->chip_base_addr+SJAMOD)&sjaMOD_RM){
+ if(!i--) return -ENODEV;
+ udelay(1000);
+ pcm3680_write_register(0, chip->chip_base_addr+SJAMOD);
+ }
+ udelay(1000);
+ pcm3680_write_register(sjaCDR_PELICAN, chip->chip_base_addr+SJACDR);
+ pcm3680_write_register(0x00, chip->chip_base_addr + SJAIER);
}
- else
- DEBUGMSG("Chip[1] reset status ok.\n");
-*/
+
return 0;
}
#define RESET_ADDR 0x100
#define NR_82527 0
-#define NR_SJA1000 1
+#define NR_SJA1000 2
/**
- * template_init_hw_data - Initialze hardware cards
- * @card: Number of the hardware card.
+ * template_init_hw_data - Initialize hardware cards
+ * @candev: Pointer to candevice/board structure
*
* The function template_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/template.c
*/
-int pcm3680_init_hw_data(int card)
+int pcm3680_init_hw_data(struct candevice_t *candev)
{
- candevices_p[card]->res_addr=RESET_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=RESET_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 "sja1000p"
/**
* template_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 template_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/template.c
*/
-int pcm3680_init_chip_data(int card, int chipnr)
+int pcm3680_init_chip_data(struct candevice_t *candev, int chipnr)
{
- pcm3680_base_addr = candevices_p[card]->io_addr;
- 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_clk_reg = 0x0;
- candevices_p[card]->chip[chipnr]->int_bus_reg = 0x0;
- candevices_p[card]->chip[chipnr]->sja_cdr_reg = CDR_CBP | CDR_CLK_OFF;
- candevices_p[card]->chip[chipnr]->sja_ocr_reg = OCR_MODE_NORMAL |
- OCR_TX0_LH;
+ candev->chip[chipnr]->chip_type=CHIP_TYPE;
+ candev->chip[chipnr]->chip_base_addr=
+ candev->io_addr + 0x200*chipnr;
+ candev->chip[chipnr]->clock = 16000000;
+ 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;
}
/**
* template_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 template_init_obj_data() is used to initialize the hardware
* Return Value: The function always returns zero
* File: src/template.c
*/
-int pcm3680_init_obj_data(int chipnr, int objnr)
+int pcm3680_init_obj_data(struct chip_t *chip, int objnr)
{
- chips_p[chipnr]->msgobj[objnr]->obj_base_addr=chips_p[chipnr]->chip_base_addr;
- chips_p[chipnr]->msgobj[objnr]->flags=0;
+ chip->msgobj[objnr]->obj_base_addr=chip->chip_base_addr;
return 0;
}
/**
* template_program_irq - program interrupts
- * @card: Number of the hardware card.
+ * @candev: Pointer to candevice/board structure
*
* The function template_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/template.c
*/
-int pcm3680_program_irq(int card)
+int pcm3680_program_irq(struct candevice_t *candev)
{
return 0;
}
* Return Value: The function does not return a value
* File: src/template.c
*/
-void pcm3680_write_register(unsigned char data, unsigned long address)
+void pcm3680_write_register(unsigned data, unsigned long address)
{
writeb(data,address);
}
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