drivers/serial/8250_gsc.c

   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
  28 static int __init
  29 serial_init_chip(struct parisc_device *dev)
  30 {
  31         struct uart_port port;
  32         unsigned long address;
  33         int err;
  34
  35         if (!dev->irq) {
  36                 /* We find some unattached serial ports by walking native
  37                  * busses.  These should be silently ignored.  Otherwise,
  38                  * what we have here is a missing parent device, so tell
  39                  * the user what they're missing.
  40                  */
  41                 if (parisc_parent(dev)->id.hw_type != HPHW_IOA) {
  42                         printk(KERN_INFO "Serial: device 0x%lx not configured.\n"
  43                                 "Enable support for Wax, Lasi, Asp or Dino.\n",
  44                                 dev->hpa.start);
  45                 }
  46                 return -ENODEV;
  47         }
  48
  49         address = dev->hpa.start;
  50         if (dev->id.sversion != 0x8d) {
  51                 address += 0x800;
  52         }
  53
  54         memset(&port, 0, sizeof(port));
  55         port.iotype     = UPIO_MEM;
  56         /* 7.272727MHz on Lasi.  Assumed the same for Dino, Wax and Timi. */
  57         port.uartclk    = 7272727;
  58         port.mapbase    = address;
  59         port.membase    = ioremap_nocache(address, 16);
  60         port.irq        = dev->irq;
  61         port.flags      = UPF_BOOT_AUTOCONF;
  62         port.dev        = &dev->dev;
  63
  64         err = serial8250_register_port(&port);
  65         if (err < 0) {
  66                 printk(KERN_WARNING "serial8250_register_port returned error %d\n", err);
  67                 iounmap(port.membase);
  68                 return err;
  69         }
  70
  71         return 0;
  72 }
  73
  74 static struct parisc_device_id serial_tbl[] = {
  75         { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 },
  76         { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c },
  77         { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d },
  78         { 0 }
  79 };
  80
  81 /* Hack.  Some machines have SERIAL_0 attached to Lasi and SERIAL_1
  82  * attached to Dino.  Unfortunately, Dino appears before Lasi in the device
  83  * tree.  To ensure that ttyS0 == SERIAL_0, we register two drivers; one
  84  * which only knows about Lasi and then a second which will find all the
  85  * other serial ports.  HPUX ignores this problem.
  86  */
  87 static struct parisc_device_id lasi_tbl[] = {
  88         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03B, 0x0008C }, /* C1xx/C1xxL */
  89         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03C, 0x0008C }, /* B132L */
  90         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03D, 0x0008C }, /* B160L */
  91         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03E, 0x0008C }, /* B132L+ */
  92         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03F, 0x0008C }, /* B180L+ */
  93         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x046, 0x0008C }, /* Rocky2 120 */
  94         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x047, 0x0008C }, /* Rocky2 150 */
  95         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x04E, 0x0008C }, /* Kiji L2 132 */
  96         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x056, 0x0008C }, /* Raven+ */
  97         { 0 }
  98 };
  99
 100
 101 MODULE_DEVICE_TABLE(parisc, serial_tbl);
 102
 103 static struct parisc_driver lasi_driver = {
 104         .name           = "serial_1",
 105         .id_table       = lasi_tbl,
 106         .probe          = serial_init_chip,
 107 };
 108
 109 static struct parisc_driver serial_driver = {
 110         .name           = "serial",
 111         .id_table       = serial_tbl,
 112         .probe          = serial_init_chip,
 113 };
 114
 115 int __init probe_serial_gsc(void)
 116 {
 117         register_parisc_driver(&lasi_driver);
 118         register_parisc_driver(&serial_driver);
 119         return 0;
 120 }
 121
 122 module_init(probe_serial_gsc);