tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
29static int __init
30serial_init_chip(struct parisc_device *dev)
31{
32 struct uart_port port;
33 unsigned long address;
34 int err;
35
36 if (!dev->irq) {
37 /* We find some unattached serial ports by walking native
38 * busses. These should be silently ignored. Otherwise,
39 * what we have here is a missing parent device, so tell
40 * the user what they're missing.
41 */
42 if (parisc_parent(dev)->id.hw_type != HPHW_IOA) {
43 printk(KERN_INFO "Serial: device 0x%lx not configured.\n"
44 "Enable support for Wax, Lasi, Asp or Dino.\n",
45 dev->hpa.start);
46 }
47 return -ENODEV;
48 }
49
50 address = dev->hpa.start;
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
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
113int __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);