ia64/linux-2.6.18-xen.hg

view drivers/serial/8250_acorn.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 * linux/drivers/serial/acorn.c
3 *
4 * Copyright (C) 1996-2003 Russell King.
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 version 2 as
8 * published by the Free Software Foundation.
9 */
10 #include <linux/module.h>
11 #include <linux/types.h>
12 #include <linux/tty.h>
13 #include <linux/serial_core.h>
14 #include <linux/errno.h>
15 #include <linux/ioport.h>
16 #include <linux/slab.h>
17 #include <linux/device.h>
18 #include <linux/init.h>
20 #include <asm/io.h>
21 #include <asm/ecard.h>
22 #include <asm/string.h>
24 #include "8250.h"
26 #define MAX_PORTS 3
28 struct serial_card_type {
29 unsigned int num_ports;
30 unsigned int uartclk;
31 unsigned int type;
32 unsigned int offset[MAX_PORTS];
33 };
35 struct serial_card_info {
36 unsigned int num_ports;
37 int ports[MAX_PORTS];
38 };
40 static int __devinit
41 serial_card_probe(struct expansion_card *ec, const struct ecard_id *id)
42 {
43 struct serial_card_info *info;
44 struct serial_card_type *type = id->data;
45 struct uart_port port;
46 unsigned long bus_addr;
47 unsigned char __iomem *virt_addr;
48 unsigned int i;
50 info = kmalloc(sizeof(struct serial_card_info), GFP_KERNEL);
51 if (!info)
52 return -ENOMEM;
54 memset(info, 0, sizeof(struct serial_card_info));
55 info->num_ports = type->num_ports;
57 bus_addr = ecard_resource_start(ec, type->type);
58 virt_addr = ioremap(bus_addr, ecard_resource_len(ec, type->type));
59 if (!virt_addr) {
60 kfree(info);
61 return -ENOMEM;
62 }
64 ecard_set_drvdata(ec, info);
66 memset(&port, 0, sizeof(struct uart_port));
67 port.irq = ec->irq;
68 port.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
69 port.uartclk = type->uartclk;
70 port.iotype = UPIO_MEM;
71 port.regshift = 2;
72 port.dev = &ec->dev;
74 for (i = 0; i < info->num_ports; i ++) {
75 port.membase = virt_addr + type->offset[i];
76 port.mapbase = bus_addr + type->offset[i];
78 info->ports[i] = serial8250_register_port(&port);
79 }
81 return 0;
82 }
84 static void __devexit serial_card_remove(struct expansion_card *ec)
85 {
86 struct serial_card_info *info = ecard_get_drvdata(ec);
87 int i;
89 ecard_set_drvdata(ec, NULL);
91 for (i = 0; i < info->num_ports; i++)
92 if (info->ports[i] > 0)
93 serial8250_unregister_port(info->ports[i]);
95 kfree(info);
96 }
98 static struct serial_card_type atomwide_type = {
99 .num_ports = 3,
100 .uartclk = 7372800,
101 .type = ECARD_RES_IOCSLOW,
102 .offset = { 0x2800, 0x2400, 0x2000 },
103 };
105 static struct serial_card_type serport_type = {
106 .num_ports = 2,
107 .uartclk = 3686400,
108 .type = ECARD_RES_IOCSLOW,
109 .offset = { 0x2000, 0x2020 },
110 };
112 static const struct ecard_id serial_cids[] = {
113 { MANU_ATOMWIDE, PROD_ATOMWIDE_3PSERIAL, &atomwide_type },
114 { MANU_SERPORT, PROD_SERPORT_DSPORT, &serport_type },
115 { 0xffff, 0xffff }
116 };
118 static struct ecard_driver serial_card_driver = {
119 .probe = serial_card_probe,
120 .remove = __devexit_p(serial_card_remove),
121 .id_table = serial_cids,
122 .drv = {
123 .name = "8250_acorn",
124 },
125 };
127 static int __init serial_card_init(void)
128 {
129 return ecard_register_driver(&serial_card_driver);
130 }
132 static void __exit serial_card_exit(void)
133 {
134 ecard_remove_driver(&serial_card_driver);
135 }
137 MODULE_AUTHOR("Russell King");
138 MODULE_DESCRIPTION("Acorn 8250-compatible serial port expansion card driver");
139 MODULE_LICENSE("GPL");
141 module_init(serial_card_init);
142 module_exit(serial_card_exit);