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
serial_init_chip(struct parisc_device * dev)27 static 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
78 static 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 */
92 static 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
106 MODULE_DEVICE_TABLE(parisc, serial_tbl);
107
108 static struct parisc_driver lasi_driver = {
109 .name = "serial_1",
110 .id_table = lasi_tbl,
111 .probe = serial_init_chip,
112 };
113
114 static struct parisc_driver serial_driver = {
115 .name = "serial",
116 .id_table = serial_tbl,
117 .probe = serial_init_chip,
118 };
119
probe_serial_gsc(void)120 static int __init probe_serial_gsc(void)
121 {
122 register_parisc_driver(&lasi_driver);
123 register_parisc_driver(&serial_driver);
124 return 0;
125 }
126
127 module_init(probe_serial_gsc);
128
129 MODULE_LICENSE("GPL");
130