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
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%llx not configured.\n"
43 "Enable support for Wax, Lasi, Asp or Dino.\n",
44 (unsigned long long)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");