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6
7#include <linux/module.h>
8#include <linux/types.h>
9#include <linux/tty.h>
10#include <linux/serial_core.h>
11#include <linux/errno.h>
12#include <linux/ioport.h>
13#include <linux/slab.h>
14#include <linux/device.h>
15#include <linux/init.h>
16
17#include <asm/io.h>
18#include <asm/ecard.h>
19#include <asm/string.h>
20
21#include "8250.h"
22
23#define MAX_PORTS 3
24
25struct serial_card_type {
26 unsigned int num_ports;
27 unsigned int uartclk;
28 unsigned int type;
29 unsigned int offset[MAX_PORTS];
30};
31
32struct serial_card_info {
33 unsigned int num_ports;
34 int ports[MAX_PORTS];
35 void __iomem *vaddr;
36};
37
38static int
39serial_card_probe(struct expansion_card *ec, const struct ecard_id *id)
40{
41 struct serial_card_info *info;
42 struct serial_card_type *type = id->data;
43 struct uart_8250_port uart;
44 unsigned long bus_addr;
45 unsigned int i;
46
47 info = kzalloc(sizeof(struct serial_card_info), GFP_KERNEL);
48 if (!info)
49 return -ENOMEM;
50
51 info->num_ports = type->num_ports;
52
53 bus_addr = ecard_resource_start(ec, type->type);
54 info->vaddr = ecardm_iomap(ec, type->type, 0, 0);
55 if (!info->vaddr) {
56 kfree(info);
57 return -ENOMEM;
58 }
59
60 ecard_set_drvdata(ec, info);
61
62 memset(&uart, 0, sizeof(struct uart_8250_port));
63 uart.port.irq = ec->irq;
64 uart.port.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
65 uart.port.uartclk = type->uartclk;
66 uart.port.iotype = UPIO_MEM;
67 uart.port.regshift = 2;
68 uart.port.dev = &ec->dev;
69
70 for (i = 0; i < info->num_ports; i++) {
71 uart.port.membase = info->vaddr + type->offset[i];
72 uart.port.mapbase = bus_addr + type->offset[i];
73
74 info->ports[i] = serial8250_register_8250_port(&uart);
75 }
76
77 return 0;
78}
79
80static void serial_card_remove(struct expansion_card *ec)
81{
82 struct serial_card_info *info = ecard_get_drvdata(ec);
83 int i;
84
85 ecard_set_drvdata(ec, NULL);
86
87 for (i = 0; i < info->num_ports; i++)
88 if (info->ports[i] > 0)
89 serial8250_unregister_port(info->ports[i]);
90
91 kfree(info);
92}
93
94static struct serial_card_type atomwide_type = {
95 .num_ports = 3,
96 .uartclk = 7372800,
97 .type = ECARD_RES_IOCSLOW,
98 .offset = { 0x2800, 0x2400, 0x2000 },
99};
100
101static struct serial_card_type serport_type = {
102 .num_ports = 2,
103 .uartclk = 3686400,
104 .type = ECARD_RES_IOCSLOW,
105 .offset = { 0x2000, 0x2020 },
106};
107
108static const struct ecard_id serial_cids[] = {
109 { MANU_ATOMWIDE, PROD_ATOMWIDE_3PSERIAL, &atomwide_type },
110 { MANU_SERPORT, PROD_SERPORT_DSPORT, &serport_type },
111 { 0xffff, 0xffff }
112};
113
114static struct ecard_driver serial_card_driver = {
115 .probe = serial_card_probe,
116 .remove = serial_card_remove,
117 .id_table = serial_cids,
118 .drv = {
119 .name = "8250_acorn",
120 },
121};
122
123static int __init serial_card_init(void)
124{
125 return ecard_register_driver(&serial_card_driver);
126}
127
128static void __exit serial_card_exit(void)
129{
130 ecard_remove_driver(&serial_card_driver);
131}
132
133MODULE_AUTHOR("Russell King");
134MODULE_DESCRIPTION("Acorn 8250-compatible serial port expansion card driver");
135MODULE_LICENSE("GPL");
136
137module_init(serial_card_init);
138module_exit(serial_card_exit);
139
