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
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_8250_port uart;
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(&uart, 0, sizeof(struct uart_8250_port));
66 	uart.port.irq	= ec->irq;
67 	uart.port.flags	= UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
68 	uart.port.uartclk	= type->uartclk;
69 	uart.port.iotype	= UPIO_MEM;
70 	uart.port.regshift	= 2;
71 	uart.port.dev	= &ec->dev;
72 
73 	for (i = 0; i < info->num_ports; i ++) {
74 		uart.port.membase = info->vaddr + type->offset[i];
75 		uart.port.mapbase = bus_addr + type->offset[i];
76 
77 		info->ports[i] = serial8250_register_8250_port(&uart);
78 	}
79 
80 	return 0;
81 }
82 
83 static void 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		= 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