--- /dev/null
+/* 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>
+
+#include "../include/main.h"
+#include "../include/nsi.h"
+#include "../include/i82527.h"
+
+int nsican_irq=-1;
+unsigned long nsican_base=0x0;
+
+/* 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.
+ */
+#define IO_RANGE 0x04
+
+/* 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.
+ */
+int nsi_request_io(unsigned long io_addr)
+{
+
+ if (check_region(io_addr,IO_RANGE)) {
+ CANMSG("Unable to open port: 0x%lx\n",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);
+ }
+ return 0;
+}
+
+/* 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)
+{
+
+ release_region(io_addr,IO_RANGE);
+
+ return 0;
+}
+
+/* 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 check
+ * the reset status of the chip before returning.
+ */
+int nsi_reset(int card)
+{
+ 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);
+ for (i = 1; i < 1000; i++)
+ udelay (1000);
+
+
+ /* Check hardware reset status */
+ i=0;
+ while ( (nsi_read_register(nsican_base+iCPU) & iCPU_RST) && (i<=15)) {
+ udelay(20000);
+ i++;
+ }
+ if (i>=15) {
+ CANMSG("Reset status timeout!\n");
+ CANMSG("Please check your hardware.\n");
+ return -ENODEV;
+ }
+ else
+ DEBUGMSG("Chip0 reset status ok.\n");
+
+ return 0;
+}
+
+/* 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 hardware uses programmable interrupts.
+ */
+#define RESET_ADDR 0x02
+#define NR_82527 1
+#define NR_SJA1000 0
+
+int nsi_init_hw_data(int card)
+ {
+ 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;
+
+ return 0;
+}
+
+/* The function template_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 argument holds the chip clock value in Hz.
+ */
+#define CHIP_TYPE "i82527"
+
+int nsi_init_chip_data(int card, 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;
+
+ return 0;
+}
+
+ /* The function template_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.
+ */
+int nsi_init_obj_data(int chipnr, 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;
+
+ 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
+ * function unedited. Again this function is hardware specific so there's no
+ * example code.
+ */
+int nsi_program_irq(int card)
+{
+ return 0;
+}
+
+/* The function template_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.
+ */
+void nsi_write_register(unsigned char data, unsigned long 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
+ and the data on the eight MSB bits in one time */
+ 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)
+{
+ /* this is the same thing that the function write_register.
+ 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;
+}
+
+
+ /* !!! Don't change this function !!! */
+int nsi_register(struct hwspecops_t *hwspecops)
+{
+ hwspecops->request_io = nsi_request_io;
+ hwspecops->release_io = nsi_release_io;
+ hwspecops->reset = nsi_reset;
+ hwspecops->init_hw_data = nsi_init_hw_data;
+ hwspecops->init_chip_data = nsi_init_chip_data;
+ hwspecops->init_obj_data = nsi_init_obj_data;
+ hwspecops->write_register = nsi_write_register;
+ hwspecops->read_register = nsi_read_register;
+ hwspecops->program_irq = nsi_program_irq;
+ return 0;
+}
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