LXR linux/drivers/serial/8250

   1/*
   2 *      Serial Device Initialisation for Lasi/Asp/Wax/Dino
   3 *
   4 *      (c) Copyright Matthew Wilcox <willy@debian.org> 2001-2002
   5 *
   6 *      This program is free software; you can redistribute it and/or modify
   7 *      it under the terms of the GNU General Public License as published by
   8 *      the Free Software Foundation; either version 2 of the License, or
   9 *      (at your option) any later version.
  10 */
  11
  12#include <linux/errno.h>
  13#include <linux/init.h>
  14#include <linux/interrupt.h>
  15#include <linux/ioport.h>
  16#include <linux/module.h>
  17#include <linux/serial_core.h>
  18#include <linux/signal.h>
  19#include <linux/slab.h>
  20#include <linux/types.h>
  21
  22#include <asm/hardware.h>
  23#include <asm/parisc-device.h>
  24#include <asm/io.h>
  25
  26#include "8250.h"
  27
  28static int __init serial_init_chip(struct parisc_device *dev)
  29{
  30        struct uart_port port;
  31        unsigned long address;
  32        int err;
  33
  34        if (!dev->irq) {
  35                /* We find some unattached serial ports by walking native
  36                 * busses.  These should be silently ignored.  Otherwise,
  37                 * what we have here is a missing parent device, so tell
  38                 * the user what they're missing.
  39                 */
  40                if (parisc_parent(dev)->id.hw_type != HPHW_IOA)
  41                        printk(KERN_INFO
  42                                "Serial: device 0x%lx not configured.\n"
  43                                "Enable support for Wax, Lasi, Asp or Dino.\n",
  44                                dev->hpa.start);
  45                return -ENODEV;
  46        }
  47
  48        address = dev->hpa.start;
  49        if (dev->id.sversion != 0x8d)
  50                address += 0x800;
  51
  52        memset(&port, 0, sizeof(port));
  53        port.iotype     = UPIO_MEM;
  54        /* 7.272727MHz on Lasi.  Assumed the same for Dino, Wax and Timi. */
  55        port.uartclk    = 7272727;
  56        port.mapbase    = address;
  57        port.membase    = ioremap_nocache(address, 16);
  58        port.irq        = dev->irq;
  59        port.flags      = UPF_BOOT_AUTOCONF;
  60        port.dev        = &dev->dev;
  61
  62        err = serial8250_register_port(&port);
  63        if (err < 0) {
  64                printk(KERN_WARNING
  65                        "serial8250_register_port returned error %d\n", err);
  66                iounmap(port.membase);
  67                return err;
  68        }
  69
  70        return 0;
  71}
  72
  73static struct parisc_device_id serial_tbl[] = {
  74        { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 },
  75        { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c },
  76        { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d },
  77        { 0 }
  78};
  79
  80/* Hack.  Some machines have SERIAL_0 attached to Lasi and SERIAL_1
  81 * attached to Dino.  Unfortunately, Dino appears before Lasi in the device
  82 * tree.  To ensure that ttyS0 == SERIAL_0, we register two drivers; one
  83 * which only knows about Lasi and then a second which will find all the
  84 * other serial ports.  HPUX ignores this problem.
  85 */
  86static struct parisc_device_id lasi_tbl[] = {
  87        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03B, 0x0008C }, /* C1xx/C1xxL */
  88        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03C, 0x0008C }, /* B132L */
  89        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03D, 0x0008C }, /* B160L */
  90        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03E, 0x0008C }, /* B132L+ */
  91        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03F, 0x0008C }, /* B180L+ */
  92        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x046, 0x0008C }, /* Rocky2 120 */
  93        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x047, 0x0008C }, /* Rocky2 150 */
  94        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x04E, 0x0008C }, /* Kiji L2 132 */
  95        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x056, 0x0008C }, /* Raven+ */
  96        { 0 }
  97};
  98
  99
 100MODULE_DEVICE_TABLE(parisc, serial_tbl);
 101
 102static struct parisc_driver lasi_driver = {
 103        .name           = "serial_1",
 104        .id_table       = lasi_tbl,
 105        .probe          = serial_init_chip,
 106};
 107
 108static struct parisc_driver serial_driver = {
 109        .name           = "serial",
 110        .id_table       = serial_tbl,
 111        .probe          = serial_init_chip,
 112};
 113
 114static int __init probe_serial_gsc(void)
 115{
 116        register_parisc_driver(&lasi_driver);
 117        register_parisc_driver(&serial_driver);
 118        return 0;
 119}
 120
 121module_init(probe_serial_gsc);
 122
 123MODULE_LICENSE("GPL");
 124