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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]; |
38 | void __iomem *vaddr; |
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; |
48 | unsigned int i; |
49 | |
50 | info = kzalloc(sizeof(struct serial_card_info), GFP_KERNEL); |
51 | if (!info) |
52 | return -ENOMEM; |
53 | |
54 | info->num_ports = type->num_ports; |
55 | |
56 | bus_addr = ecard_resource_start(ec, type->type); |
57 | info->vaddr = ecardm_iomap(ec, type->type, 0, 0); |
58 | if (!info->vaddr) { |
59 | kfree(info); |
60 | return -ENOMEM; |
61 | } |
62 | |
63 | ecard_set_drvdata(ec, info); |
64 | |
65 | memset(&port, 0, sizeof(struct uart_port)); |
66 | port.irq = ec->irq; |
67 | port.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ; |
68 | port.uartclk = type->uartclk; |
69 | port.iotype = UPIO_MEM; |
70 | port.regshift = 2; |
71 | port.dev = &ec->dev; |
72 | |
73 | for (i = 0; i < info->num_ports; i ++) { |
74 | port.membase = info->vaddr + type->offset[i]; |
75 | port.mapbase = bus_addr + type->offset[i]; |
76 | |
77 | info->ports[i] = serial8250_register_port(&port); |
78 | } |
79 | |
80 | return 0; |
81 | } |
82 | |
83 | static void __devexit serial_card_remove(struct expansion_card *ec) |
84 | { |
85 | struct serial_card_info *info = ecard_get_drvdata(ec); |
86 | int i; |
87 | |
88 | ecard_set_drvdata(ec, NULL); |
89 | |
90 | for (i = 0; i < info->num_ports; i++) |
91 | if (info->ports[i] > 0) |
92 | serial8250_unregister_port(info->ports[i]); |
93 | |
94 | kfree(info); |
95 | } |
96 | |
97 | static struct serial_card_type atomwide_type = { |
98 | .num_ports = 3, |
99 | .uartclk = 7372800, |
100 | .type = ECARD_RES_IOCSLOW, |
101 | .offset = { 0x2800, 0x2400, 0x2000 }, |
102 | }; |
103 | |
104 | static struct serial_card_type serport_type = { |
105 | .num_ports = 2, |
106 | .uartclk = 3686400, |
107 | .type = ECARD_RES_IOCSLOW, |
108 | .offset = { 0x2000, 0x2020 }, |
109 | }; |
110 | |
111 | static const struct ecard_id serial_cids[] = { |
112 | { MANU_ATOMWIDE, PROD_ATOMWIDE_3PSERIAL, &atomwide_type }, |
113 | { MANU_SERPORT, PROD_SERPORT_DSPORT, &serport_type }, |
114 | { 0xffff, 0xffff } |
115 | }; |
116 | |
117 | static struct ecard_driver serial_card_driver = { |
118 | .probe = serial_card_probe, |
119 | .remove = __devexit_p(serial_card_remove), |
120 | .id_table = serial_cids, |
121 | .drv = { |
122 | .name = "8250_acorn", |
123 | }, |
124 | }; |
125 | |
126 | static int __init serial_card_init(void) |
127 | { |
128 | return ecard_register_driver(&serial_card_driver); |
129 | } |
130 | |
131 | static void __exit serial_card_exit(void) |
132 | { |
133 | ecard_remove_driver(&serial_card_driver); |
134 | } |
135 | |
136 | MODULE_AUTHOR("Russell King"); |
137 | MODULE_DESCRIPTION("Acorn 8250-compatible serial port expansion card driver"); |
138 | MODULE_LICENSE("GPL"); |
139 | |
140 | module_init(serial_card_init); |
141 | module_exit(serial_card_exit); |
142 |
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