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#ifdef CONFIG_64BIT
34	if (!dev->irq && (dev->id.sversion == 0xad))
35		dev->irq = iosapic_serial_irq(dev);
36#endif
37
38	if (!dev->irq) {
39		/* We find some unattached serial ports by walking native
40		 * busses.  These should be silently ignored.  Otherwise,
41		 * what we have here is a missing parent device, so tell
42		 * the user what they're missing.
43		 */
44		if (parisc_parent(dev)->id.hw_type != HPHW_IOA)
45			printk(KERN_INFO
46				"Serial: device 0x%llx not configured.\n"
47				"Enable support for Wax, Lasi, Asp or Dino.\n",
48				(unsigned long long)dev->hpa.start);
49		return -ENODEV;
50	}
51
52	address = dev->hpa.start;
53	if (dev->id.sversion != 0x8d)
54		address += 0x800;
55
56	memset(&uart, 0, sizeof(uart));
57	uart.port.iotype	= UPIO_MEM;
58	/* 7.272727MHz on Lasi.  Assumed the same for Dino, Wax and Timi. */
59	uart.port.uartclk	= (dev->id.sversion != 0xad) ?
60					7272727 : 1843200;
61	uart.port.mapbase	= address;
62	uart.port.membase	= ioremap_nocache(address, 16);
63	uart.port.irq	= dev->irq;
64	uart.port.flags	= UPF_BOOT_AUTOCONF;
65	uart.port.dev	= &dev->dev;
66
67	err = serial8250_register_8250_port(&uart);
68	if (err < 0) {
69		printk(KERN_WARNING
70			"serial8250_register_8250_port returned error %d\n", err);
71		iounmap(uart.port.membase);
72		return err;
73	}
74
75	return 0;
76}
77
78static struct parisc_device_id serial_tbl[] = {
79	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 },
80	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c },
81	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d },
82	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x000ad },
83	{ 0 }
84};
85
86/* Hack.  Some machines have SERIAL_0 attached to Lasi and SERIAL_1
87 * attached to Dino.  Unfortunately, Dino appears before Lasi in the device
88 * tree.  To ensure that ttyS0 == SERIAL_0, we register two drivers; one
89 * which only knows about Lasi and then a second which will find all the
90 * other serial ports.  HPUX ignores this problem.
91 */
92static struct parisc_device_id lasi_tbl[] = {
93	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03B, 0x0008C }, /* C1xx/C1xxL */
94	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03C, 0x0008C }, /* B132L */
95	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03D, 0x0008C }, /* B160L */
96	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03E, 0x0008C }, /* B132L+ */
97	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03F, 0x0008C }, /* B180L+ */
98	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x046, 0x0008C }, /* Rocky2 120 */
99	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x047, 0x0008C }, /* Rocky2 150 */
100	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x04E, 0x0008C }, /* Kiji L2 132 */
101	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x056, 0x0008C }, /* Raven+ */
102	{ 0 }
103};
104
105
106MODULE_DEVICE_TABLE(parisc, serial_tbl);
107
108static struct parisc_driver lasi_driver = {
109	.name		= "serial_1",
110	.id_table	= lasi_tbl,
111	.probe		= serial_init_chip,
112};
113
114static struct parisc_driver serial_driver = {
115	.name		= "serial",
116	.id_table	= serial_tbl,
117	.probe		= serial_init_chip,
118};
119
120static int __init probe_serial_gsc(void)
121{
122	register_parisc_driver(&lasi_driver);
123	register_parisc_driver(&serial_driver);
124	return 0;
125}
126
127module_init(probe_serial_gsc);
128
129MODULE_LICENSE("GPL");
130