lincan/src/sh7760.c

   1 /* sh7760.c
   2 * Linux CAN-bus device driver.
   3 * This software is released under the GPL-License.
   4 */
   5
   6 #include "../include/can.h"
   7 #include "../include/can_sysdep.h"
   8 #include "../include/main.h"
   9 #include "../include/sh7760.h"
  10 #include "../include/hcan2.h"
  11
  12 int sh7760_request_io(struct candevice_t *candev)
  13 {
  14         if (!can_request_io_region(candev->io_addr, candev->nr_all_chips * IO_RANGE, DEVICE_NAME)) {
  15                 CANMSG("Unable to open port: 0x%lx\n",candev->io_addr);
  16                 return -ENODEV;
  17         }
  18
  19         DEBUGMSG("Registered IO-memory: 0x%lx - 0x%lx\n", candev->io_addr, candev->io_addr + candev->nr_all_chips * IO_RANGE - 1);
  20         return 0;
  21 }
  22
  23 int sh7760_release_io(struct candevice_t *candev)
  24 {
  25         can_release_io_region(candev->io_addr, candev->nr_all_chips * IO_RANGE);
  26
  27         return 0;
  28 }
  29
  30 int sh7760_reset(struct candevice_t *candev)
  31 {
  32         int i;
  33         DEBUGMSG("Resetting HCAN2 chips ...\n");
  34
  35         for (i = 0; i < candev->nr_all_chips; i++)
  36         {
  37             /* !!! Assuming this card has ONLY HCAN2 chips !!! */
  38             if (hcan2_reset_chip(candev->chip[i])) return -ENODEV;
  39         }
  40
  41         return 0;
  42 }
  43
  44 int sh7760_init_hw_data(struct candevice_t *candev)
  45 {
  46         /* candev->res_addr = RESET_ADDR; */
  47         candev->nr_82527_chips = NR_82527;
  48         candev->nr_sja1000_chips = NR_SJA1000;
  49         candev->nr_all_chips = NR_ALL;
  50         /* candev->flags |= CANDEV_PROGRAMMABLE_IRQ; */
  51
  52         return 0;
  53 }
  54 int sh7760_init_chip_data(struct candevice_t *candev, int chipnr)
  55 {
  56         hcan2_fill_chipspecops(candev->chip[chipnr]);
  57
  58         candev->chip[chipnr]->chip_base_addr = can_ioport2ioptr(candev->io_addr) + chipnr * SH7760_CAN_CHIP_OFFSET; /* one chip with 2 interfaces */
  59         candev->chip[chipnr]->clock = SH7760_CAN_CLOCK;
  60         candev->chip[chipnr]->chip_irq = SH7760_CAN_IRQ + chipnr;
  61         candev->chip[chipnr]->hostdevice = candev;
  62
  63         return 0;
  64 }
  65
  66 int sh7760_init_obj_data(struct canchip_t *chip, int objnr)
  67 {
  68         chip->msgobj[objnr]->obj_base_addr = (can_ioptr_t) HCAN2_MB0 + HCAN2_MB_OFFSET * objnr;
  69
  70         return 0;
  71 }
  72
  73 int sh7760_program_irq(struct candevice_t *candev)
  74 {
  75         /* sh7760 doesn't use programmable interrupt */
  76         return 0;
  77 }
  78
  79
  80 void sh7760_write_register(unsigned data, can_ioptr_t address)
  81 {
  82         /* address is an absolute address */
  83         writew(data, address);
  84 }
  85
  86 unsigned sh7760_read_register(can_ioptr_t address)
  87 {
  88         /* address is an absolute address */
  89         return readw(address);
  90 }
  91
  92 int sh7760_register(struct hwspecops_t *hwspecops)
  93 {
  94         hwspecops->request_io = sh7760_request_io;
  95         hwspecops->release_io = sh7760_release_io;
  96         hwspecops->reset = sh7760_reset;
  97         hwspecops->init_hw_data = sh7760_init_hw_data;
  98         hwspecops->init_chip_data = sh7760_init_chip_data;
  99         hwspecops->init_obj_data = sh7760_init_obj_data;
 100         hwspecops->program_irq = sh7760_program_irq;
 101         hwspecops->write_register = sh7760_write_register;
 102         hwspecops->read_register = sh7760_read_register;
 103         return 0;
 104 }