LXR linux/drivers/tty/serial/8250/8250

   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/types.h>
  20
  21#include <asm/hardware.h>
  22#include <asm/parisc-device.h>
  23#include <asm/io.h>
  24
  25#include "8250.h"
  26
  27static int __init serial_init_chip(struct parisc_device *dev)
  28{
  29        struct uart_8250_port uart;
  30        unsigned long address;
  31        int err;
  32
  33        if (!dev->irq) {
  34                /* We find some unattached serial ports by walking native
  35                 * busses.  These should be silently ignored.  Otherwise,
  36                 * what we have here is a missing parent device, so tell
  37                 * the user what they're missing.
  38                 */
  39                if (parisc_parent(dev)->id.hw_type != HPHW_IOA)
  40                        printk(KERN_INFO
  41                                "Serial: device 0x%llx not configured.\n"
  42                                "Enable support for Wax, Lasi, Asp or Dino.\n",
  43                                (unsigned long long)dev->hpa.start);
  44                return -ENODEV;
  45        }
  46
  47        address = dev->hpa.start;
  48        if (dev->id.sversion != 0x8d)
  49                address += 0x800;
  50
  51        memset(&uart, 0, sizeof(uart));
  52        uart.port.iotype        = UPIO_MEM;
  53        /* 7.272727MHz on Lasi.  Assumed the same for Dino, Wax and Timi. */
  54        uart.port.uartclk       = 7272727;
  55        uart.port.mapbase       = address;
  56        uart.port.membase       = ioremap_nocache(address, 16);
  57        uart.port.irq   = dev->irq;
  58        uart.port.flags = UPF_BOOT_AUTOCONF;
  59        uart.port.dev   = &dev->dev;
  60
  61        err = serial8250_register_8250_port(&uart);
  62        if (err < 0) {
  63                printk(KERN_WARNING
  64                        "serial8250_register_8250_port returned error %d\n", err);
  65                iounmap(uart.port.membase);
  66                return err;
  67        }
  68
  69        return 0;
  70}
  71
  72static struct parisc_device_id serial_tbl[] = {
  73        { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 },
  74        { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c },
  75        { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d },
  76        { 0 }
  77};
  78
  79/* Hack.  Some machines have SERIAL_0 attached to Lasi and SERIAL_1
  80 * attached to Dino.  Unfortunately, Dino appears before Lasi in the device
  81 * tree.  To ensure that ttyS0 == SERIAL_0, we register two drivers; one
  82 * which only knows about Lasi and then a second which will find all the
  83 * other serial ports.  HPUX ignores this problem.
  84 */
  85static struct parisc_device_id lasi_tbl[] = {
  86        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03B, 0x0008C }, /* C1xx/C1xxL */
  87        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03C, 0x0008C }, /* B132L */
  88        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03D, 0x0008C }, /* B160L */
  89        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03E, 0x0008C }, /* B132L+ */
  90        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03F, 0x0008C }, /* B180L+ */
  91        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x046, 0x0008C }, /* Rocky2 120 */
  92        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x047, 0x0008C }, /* Rocky2 150 */
  93        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x04E, 0x0008C }, /* Kiji L2 132 */
  94        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x056, 0x0008C }, /* Raven+ */
  95        { 0 }
  96};
  97
  98
  99MODULE_DEVICE_TABLE(parisc, serial_tbl);
 100
 101static struct parisc_driver lasi_driver = {
 102        .name           = "serial_1",
 103        .id_table       = lasi_tbl,
 104        .probe          = serial_init_chip,
 105};
 106
 107static struct parisc_driver serial_driver = {
 108        .name           = "serial",
 109        .id_table       = serial_tbl,
 110        .probe          = serial_init_chip,
 111};
 112
 113static int __init probe_serial_gsc(void)
 114{
 115        register_parisc_driver(&lasi_driver);
 116        register_parisc_driver(&serial_driver);
 117        return 0;
 118}
 119
 120module_init(probe_serial_gsc);
 121
 122MODULE_LICENSE("GPL");
 123