-/* nsi.c
- * Linux CAN-bus device driver.
- * Written by Arnaud Westenberg email:arnaud@wanadoo.nl
- * This software is released under the GPL-License.
- * Version 0.7 6 Aug 2001
- */
-
-#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 <asm/irq.h>
-
+/**************************************************************************/
+/* File: nsi.c - CAN104 PC/104 card by NSI */
+/* */
+/* LinCAN - (Not only) Linux CAN bus driver */
+/* Copyright (C) 2002-2009 DCE FEE CTU Prague <http://dce.felk.cvut.cz> */
+/* Copyright (C) 2002-2009 Pavel Pisa <pisa@cmp.felk.cvut.cz> */
+/* Funded by OCERA and FRESCOR IST projects */
+/* Based on CAN driver code by Arnaud Westenberg <arnaud@wanadoo.nl> */
+/* */
+/* LinCAN is free software; you can redistribute it and/or modify it */
+/* under terms of the GNU General Public License as published by the */
+/* Free Software Foundation; either version 2, or (at your option) any */
+/* later version. LinCAN is distributed in the hope that it will be */
+/* useful, but WITHOUT ANY WARRANTY; without even the implied warranty */
+/* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU */
+/* General Public License for more details. You should have received a */
+/* copy of the GNU General Public License along with LinCAN; see file */
+/* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, */
+/* Cambridge, MA 02139, USA. */
+/* */
+/* To allow use of LinCAN in the compact embedded systems firmware */
+/* and RT-executives (RTEMS for example), main authors agree with next */
+/* special exception: */
+/* */
+/* Including LinCAN header files in a file, instantiating LinCAN generics */
+/* or templates, or linking other files with LinCAN objects to produce */
+/* an application image/executable, does not by itself cause the */
+/* resulting application image/executable to be covered by */
+/* the GNU General Public License. */
+/* This exception does not however invalidate any other reasons */
+/* why the executable file might be covered by the GNU Public License. */
+/* Publication of enhanced or derived LinCAN files is required although. */
+/**************************************************************************/
+
+#include "../include/can.h"
+#include "../include/can_sysdep.h"
#include "../include/main.h"
#include "../include/nsi.h"
#include "../include/i82527.h"
int nsican_irq=-1;
unsigned long nsican_base=0x0;
+static CAN_DEFINE_SPINLOCK(nsican_port_lock);
+
/* 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.
/* 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
* will have to add the code to reserve this memory as well.
- * The reserved memory starts at io_addr, wich is the module parameter io.
+ * The reserved memory starts at candev->io_addr, wich is the module parameter io.
*/
-int nsi_request_io(unsigned long io_addr)
+int nsi_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;
}
-/* The function template_release_io is used to free the previously reserved
+/* The function template_release_io is used to free the previously reserved
* io-memory. In case you reserved more memory, don't forget to free it here.
*/
-int nsi_release_io(unsigned long io_addr)
+int nsi_release_io(struct candevice_t *candev)
{
- release_region(io_addr,IO_RANGE);
+ can_release_io_region(candev->io_addr,IO_RANGE);
return 0;
}
* hardware specific so I haven't included example code. Don't forget to check
* the reset status of the chip before returning.
*/
-int nsi_reset(int card)
+int nsi_reset(struct candevice_t *candev)
{
- int i;
+ int i;
DEBUGMSG("Resetting nsi hardware ...\n");
/* we don't use template_write_register because we don't use the two first
register of the card but the third in order to make a hard reset */
- outb (1, nsican_base + candevices_p[card]->res_addr);
- outb (0, nsican_base + candevices_p[card]->res_addr);
+ can_outb (1, nsican_base + candev->res_addr);
+ can_outb (0, nsican_base + candev->res_addr);
for (i = 1; i < 1000; i++)
udelay (1000);
-
-
- /* Check hardware reset status */
+
+
+ /* Check hardware reset status */
i=0;
while ( (nsi_read_register(nsican_base+iCPU) & iCPU_RST) && (i<=15)) {
- udelay(20000);
+ mdelay(20);
i++;
}
if (i>=15) {
* 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.
*/
#define RESET_ADDR 0x02
#define NR_82527 1
#define NR_SJA1000 0
-int nsi_init_hw_data(int card)
+int nsi_init_hw_data(struct candevice_t *candev)
{
- candevices_p[card]->res_addr=RESET_ADDR;
- candevices_p[card]->nr_82527_chips=1;
- candevices_p[card]->nr_sja1000_chips=0;
- candevices_p[card]->flags |= PROGRAMMABLE_IRQ;
+ candev->res_addr=RESET_ADDR;
+ candev->nr_82527_chips=1;
+ candev->nr_sja1000_chips=0;
+ candev->nr_all_chips=1;
+ candev->flags |= CANDEV_PROGRAMMABLE_IRQ;
return 0;
}
* 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
+ * of the installed chip. It's likely that this is the same as the candev->io_addr
* argument supplied at module loading time.
* The clock argument holds the chip clock value in Hz.
*/
-#define CHIP_TYPE "i82527"
-int nsi_init_chip_data(int card, int chipnr)
+int nsi_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;
- nsican_irq=candevices_p[card]->chip[chipnr]->chip_irq;
- nsican_base=candevices_p[card]->chip[chipnr]->chip_base_addr;
- candevices_p[card]->chip[chipnr]->int_cpu_reg = iCPU_DSC;
- candevices_p[card]->chip[chipnr]->int_clk_reg = iCLK_SL1;
- candevices_p[card]->chip[chipnr]->int_bus_reg = iBUS_CBY;
+ i82527_fill_chipspecops(candev->chip[chipnr]);
+ candev->chip[chipnr]->chip_base_addr=
+ can_ioport2ioptr(candev->io_addr);
+ candev->chip[chipnr]->clock = 16000000;
+ nsican_irq=candev->chip[chipnr]->chip_irq;
+ nsican_base=candev->chip[chipnr]->chip_base_addr;
+ candev->chip[chipnr]->int_cpu_reg = iCPU_DSC;
+ candev->chip[chipnr]->int_clk_reg = iCLK_SL1;
+ candev->chip[chipnr]->int_bus_reg = iBUS_CBY;
return 0;
}
* 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
+ * 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.
*/
-int nsi_init_obj_data(int chipnr, int objnr)
+int nsi_init_obj_data(struct canchip_t *chip, int objnr)
{
- chips_p[chipnr]->msgobj[objnr]->obj_base_addr=
- chips_p[chipnr]->chip_base_addr+(objnr+1)*0x10;
- chips_p[chipnr]->msgobj[objnr]->flags=0;
-
+ chip->msgobj[objnr]->obj_base_addr=
+ chip->chip_base_addr+(objnr+1)*0x10;
+
return 0;
}
/* 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 leave this
+ * 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.
*/
-int nsi_program_irq(int card)
+int nsi_program_irq(struct candevice_t *candev)
{
return 0;
}
* on the CAN chip. You should only have to edit this function if your hardware
* uses some specific write process.
*/
-void nsi_write_register(unsigned char data, unsigned long address)
+void nsi_write_register(unsigned data, can_ioptr_t address)
{
/* address is an absolute address */
/* the nsi card has two registers, the address register at 0x0
and the data register at 0x01 */
- /* write the relative address on the eight LSB bits
+ /* write the relative address on the eight LSB bits
and the data on the eight MSB bits in one time */
- outw(address-nsican_base + (256 * data), nsican_base);
+ can_outw(address-nsican_base + (256 * data), nsican_base);
}
/* The function template_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.
*/
-unsigned nsi_read_register(unsigned long address)
+unsigned nsi_read_register(can_ioptr_t address)
{
/* this is the same thing that the function write_register.
- We use the two register, we write the address where we
+ We use the two register, we write the address where we
want to read in a first time. In a second time we read the
data */
- unsigned char ret;
-
- disable_irq(nsican_irq);
- outb(address-nsican_base, nsican_base);
- ret=inb(nsican_base+1);
- enable_irq(nsican_irq);
- return ret;
+ unsigned char ret;
+ can_spin_irqflags_t flags;
+
+ can_spin_lock_irqsave(&nsican_port_lock,flags);
+ can_outb(address-nsican_base, nsican_base);
+ ret=can_inb(nsican_base+1);
+ can_spin_unlock_irqrestore(&nsican_port_lock,flags);
+ return ret;
}
projects / lincan.git / blobdiff