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1da177e4 LT |
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> | |
19 | ||
20 | #include <asm/io.h> | |
21 | #include <asm/ecard.h> | |
22 | #include <asm/string.h> | |
23 | ||
24 | #include "8250.h" | |
25 | ||
26 | #define MAX_PORTS 3 | |
27 | ||
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 | }; | |
34 | ||
35 | struct serial_card_info { | |
36 | unsigned int num_ports; | |
37 | int ports[MAX_PORTS]; | |
f12ad7d5 | 38 | void __iomem *vaddr; |
1da177e4 LT |
39 | }; |
40 | ||
41 | static int __devinit | |
42 | serial_card_probe(struct expansion_card *ec, const struct ecard_id *id) | |
43 | { | |
44 | struct serial_card_info *info; | |
45 | struct serial_card_type *type = id->data; | |
46 | struct uart_port port; | |
47 | unsigned long bus_addr; | |
1da177e4 LT |
48 | unsigned int i; |
49 | ||
50 | info = kmalloc(sizeof(struct serial_card_info), GFP_KERNEL); | |
51 | if (!info) | |
52 | return -ENOMEM; | |
53 | ||
54 | memset(info, 0, sizeof(struct serial_card_info)); | |
55 | info->num_ports = type->num_ports; | |
56 | ||
57 | bus_addr = ecard_resource_start(ec, type->type); | |
f12ad7d5 AL |
58 | info->vaddr = ioremap(bus_addr, ecard_resource_len(ec, type->type)); |
59 | if (!info->vaddr) { | |
1da177e4 LT |
60 | kfree(info); |
61 | return -ENOMEM; | |
62 | } | |
63 | ||
64 | ecard_set_drvdata(ec, info); | |
65 | ||
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; | |
73 | ||
74 | for (i = 0; i < info->num_ports; i ++) { | |
f12ad7d5 | 75 | port.membase = info->vaddr + type->offset[i]; |
1da177e4 LT |
76 | port.mapbase = bus_addr + type->offset[i]; |
77 | ||
78 | info->ports[i] = serial8250_register_port(&port); | |
79 | } | |
80 | ||
81 | return 0; | |
82 | } | |
83 | ||
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; | |
88 | ||
89 | ecard_set_drvdata(ec, NULL); | |
90 | ||
91 | for (i = 0; i < info->num_ports; i++) | |
92 | if (info->ports[i] > 0) | |
93 | serial8250_unregister_port(info->ports[i]); | |
94 | ||
f12ad7d5 | 95 | iounmap(info->vaddr); |
1da177e4 LT |
96 | kfree(info); |
97 | } | |
98 | ||
99 | static struct serial_card_type atomwide_type = { | |
100 | .num_ports = 3, | |
101 | .uartclk = 7372800, | |
102 | .type = ECARD_RES_IOCSLOW, | |
103 | .offset = { 0x2800, 0x2400, 0x2000 }, | |
104 | }; | |
105 | ||
106 | static struct serial_card_type serport_type = { | |
107 | .num_ports = 2, | |
108 | .uartclk = 3686400, | |
109 | .type = ECARD_RES_IOCSLOW, | |
110 | .offset = { 0x2000, 0x2020 }, | |
111 | }; | |
112 | ||
113 | static const struct ecard_id serial_cids[] = { | |
114 | { MANU_ATOMWIDE, PROD_ATOMWIDE_3PSERIAL, &atomwide_type }, | |
115 | { MANU_SERPORT, PROD_SERPORT_DSPORT, &serport_type }, | |
116 | { 0xffff, 0xffff } | |
117 | }; | |
118 | ||
119 | static struct ecard_driver serial_card_driver = { | |
120 | .probe = serial_card_probe, | |
121 | .remove = __devexit_p(serial_card_remove), | |
122 | .id_table = serial_cids, | |
123 | .drv = { | |
124 | .name = "8250_acorn", | |
125 | }, | |
126 | }; | |
127 | ||
128 | static int __init serial_card_init(void) | |
129 | { | |
130 | return ecard_register_driver(&serial_card_driver); | |
131 | } | |
132 | ||
133 | static void __exit serial_card_exit(void) | |
134 | { | |
135 | ecard_remove_driver(&serial_card_driver); | |
136 | } | |
137 | ||
138 | MODULE_AUTHOR("Russell King"); | |
139 | MODULE_DESCRIPTION("Acorn 8250-compatible serial port expansion card driver"); | |
140 | MODULE_LICENSE("GPL"); | |
141 | ||
142 | module_init(serial_card_init); | |
143 | module_exit(serial_card_exit); |