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
28struct serial_card_type {
29	unsigned int	num_ports;
30	unsigned int	uartclk;
31	unsigned int	type;
32	unsigned int	offset[MAX_PORTS];
33};
34
35struct serial_card_info {
36	unsigned int	num_ports;
37	int		ports[MAX_PORTS];
38	void __iomem *vaddr;
39};
40
41static int
42serial_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
83static 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
97static 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
104static struct serial_card_type serport_type = {
105	.num_ports	= 2,
106	.uartclk	= 3686400,
107	.type		= ECARD_RES_IOCSLOW,
108	.offset		= { 0x2000, 0x2020 },
109};
110
111static 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
117static 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
126static int __init serial_card_init(void)
127{
128	return ecard_register_driver(&serial_card_driver);
129}
130
131static void __exit serial_card_exit(void)
132{
133	ecard_remove_driver(&serial_card_driver);
134}
135
136MODULE_AUTHOR("Russell King");
137MODULE_DESCRIPTION("Acorn 8250-compatible serial port expansion card driver");
138MODULE_LICENSE("GPL");
139
140module_init(serial_card_init);
141module_exit(serial_card_exit);
142