ia64/linux-2.6.18-xen.hg

view drivers/serial/8250_gsc.c @ 893:f994bfe9b93b

linux/blktap2: reduce TLB flush scope

c/s 885 added very coarse TLB flushing. Since these flushes always
follow single page updates, single page flushes (when available) are
sufficient.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Jun 04 10:32:57 2009 +0100 (2009-06-04)
parents 831230e53067
children
line source
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 */
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>
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 */
27 #include "8250.h"
29 static int __init
30 serial_init_chip(struct parisc_device *dev)
31 {
32 struct uart_port port;
33 unsigned long address;
34 int err;
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 }
50 address = dev->hpa.start;
51 if (dev->id.sversion != 0x8d) {
52 address += 0x800;
53 }
55 memset(&port, 0, sizeof(port));
56 port.iotype = UPIO_MEM;
57 port.uartclk = LASI_BASE_BAUD * 16;
58 port.mapbase = address;
59 port.membase = ioremap_nocache(address, 16);
60 port.irq = dev->irq;
61 port.flags = UPF_BOOT_AUTOCONF;
62 port.dev = &dev->dev;
64 err = serial8250_register_port(&port);
65 if (err < 0) {
66 printk(KERN_WARNING "serial8250_register_port returned error %d\n", err);
67 return err;
68 }
70 return 0;
71 }
73 static 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 };
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 */
86 static 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 };
100 MODULE_DEVICE_TABLE(parisc, serial_tbl);
102 static struct parisc_driver lasi_driver = {
103 .name = "serial_1",
104 .id_table = lasi_tbl,
105 .probe = serial_init_chip,
106 };
108 static struct parisc_driver serial_driver = {
109 .name = "serial",
110 .id_table = serial_tbl,
111 .probe = serial_init_chip,
112 };
114 int __init probe_serial_gsc(void)
115 {
116 register_parisc_driver(&lasi_driver);
117 register_parisc_driver(&serial_driver);
118 return 0;
119 }
121 module_init(probe_serial_gsc);