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 #include <asm/serial.h> /* for LASI_BASE_BAUD */
  26
  27 #include "8250.h"
  28
  29 static int __init
  30 serial_init_chip(struct parisc_device *dev)
  31 {
  32         static int serial_line_nr;
  33         struct uart_port port;
  34         unsigned long address;
  35         int err;
  36
  37         if (!dev->irq) {
  38                 /* We find some unattached serial ports by walking native
  39                  * busses.  These should be silently ignored.  Otherwise,
  40                  * what we have here is a missing parent device, so tell
  41                  * the user what they're missing.
  42                  */
  43                 if (parisc_parent(dev)->id.hw_type != HPHW_IOA) {
  44                         printk(KERN_INFO "Serial: device 0x%lx not configured.\n"
  45                                 "Enable support for Wax, Lasi, Asp or Dino.\n", dev->hpa);
  46                 }
  47                 return -ENODEV;
  48         }
  49
  50         address = dev->hpa;
  51         if (dev->id.sversion != 0x8d) {
  52                 address += 0x800;
  53         }
  54
  55         memset(&port, 0, sizeof(struct uart_port));
  56         port.mapbase = address;
  57         port.irq = dev->irq;
  58         port.iotype = UPIO_MEM;
  59         port.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
  60         port.uartclk = LASI_BASE_BAUD * 16;
  61         port.dev = &dev->dev;
  62
  63         err = serial8250_register_port(&port);
  64         if (err < 0) {
  65                 printk(KERN_WARNING "serial8250_register_port returned error %d\n", err);
  66                 return err;
  67         }
  68
  69         return 0;
  70 }
  71
  72 static 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  */
  85 static 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
  99 MODULE_DEVICE_TABLE(parisc, serial_tbl);
 100
 101 static struct parisc_driver lasi_driver = {
 102         .name           = "serial_1",
 103         .id_table       = lasi_tbl,
 104         .probe          = serial_init_chip,
 105 };
 106
 107 static struct parisc_driver serial_driver = {
 108         .name           = "serial",
 109         .id_table       = serial_tbl,
 110         .probe          = serial_init_chip,
 111 };
 112
 113 int __init probe_serial_gsc(void)
 114 {
 115         register_parisc_driver(&lasi_driver);
 116         register_parisc_driver(&serial_driver);
 117         return 0;
 118 }
 119
 120 module_init(probe_serial_gsc);