1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * linux/drivers/serial/acorn.c |
4 | * |
5 | * Copyright (C) 1996-2003 Russell King. |
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 | |
25 | struct serial_card_type { |
26 | unsigned int num_ports; |
27 | unsigned int uartclk; |
28 | unsigned int type; |
29 | unsigned int offset[MAX_PORTS]; |
30 | }; |
31 | |
32 | struct serial_card_info { |
33 | unsigned int num_ports; |
34 | int ports[MAX_PORTS]; |
35 | void __iomem *vaddr; |
36 | }; |
37 | |
38 | static int |
39 | serial_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(size: 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(objp: 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 | |
80 | static 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(line: info->ports[i]); |
90 | |
91 | kfree(objp: info); |
92 | } |
93 | |
94 | static 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 | |
101 | static struct serial_card_type serport_type = { |
102 | .num_ports = 2, |
103 | .uartclk = 3686400, |
104 | .type = ECARD_RES_IOCSLOW, |
105 | .offset = { 0x2000, 0x2020 }, |
106 | }; |
107 | |
108 | static 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 | |
114 | static 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 | |
123 | static int __init serial_card_init(void) |
124 | { |
125 | return ecard_register_driver(&serial_card_driver); |
126 | } |
127 | |
128 | static void __exit serial_card_exit(void) |
129 | { |
130 | ecard_remove_driver(&serial_card_driver); |
131 | } |
132 | |
133 | MODULE_AUTHOR("Russell King" ); |
134 | MODULE_DESCRIPTION("Acorn 8250-compatible serial port expansion card driver" ); |
135 | MODULE_LICENSE("GPL" ); |
136 | |
137 | module_init(serial_card_init); |
138 | module_exit(serial_card_exit); |
139 | |