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path: root/drivers/serial/8250_acpi.c
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Diffstat (limited to 'drivers/serial/8250_acpi.c')
-rw-r--r--drivers/serial/8250_acpi.c183
1 files changed, 0 insertions, 183 deletions
diff --git a/drivers/serial/8250_acpi.c b/drivers/serial/8250_acpi.c
deleted file mode 100644
index 809f89ab965c..000000000000
--- a/drivers/serial/8250_acpi.c
+++ /dev/null
@@ -1,183 +0,0 @@
1/*
2 * Copyright (c) 2002-2003 Matthew Wilcox for Hewlett-Packard
3 * Copyright (C) 2004 Hewlett-Packard Co
4 * Bjorn Helgaas <bjorn.helgaas@hp.com>
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 as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12#include <linux/acpi.h>
13#include <linux/init.h>
14#include <linux/module.h>
15#include <linux/serial_core.h>
16
17#include <acpi/acpi_bus.h>
18
19#include <asm/io.h>
20
21#include "8250.h"
22
23struct serial_private {
24 int line;
25};
26
27static acpi_status acpi_serial_mmio(struct uart_port *port,
28 struct acpi_resource_address64 *addr)
29{
30 port->mapbase = addr->minimum;
31 port->iotype = UPIO_MEM;
32 port->flags |= UPF_IOREMAP;
33 return AE_OK;
34}
35
36static acpi_status acpi_serial_port(struct uart_port *port,
37 struct acpi_resource_io *io)
38{
39 if (io->address_length) {
40 port->iobase = io->minimum;
41 port->iotype = UPIO_PORT;
42 } else
43 printk(KERN_ERR "%s: zero-length IO port range?\n", __FUNCTION__);
44 return AE_OK;
45}
46
47static acpi_status acpi_serial_ext_irq(struct uart_port *port,
48 struct acpi_resource_extended_irq *ext_irq)
49{
50 int rc;
51
52 if (ext_irq->interrupt_count > 0) {
53 rc = acpi_register_gsi(ext_irq->interrupts[0],
54 ext_irq->triggering, ext_irq->polarity);
55 if (rc < 0)
56 return AE_ERROR;
57 port->irq = rc;
58 }
59 return AE_OK;
60}
61
62static acpi_status acpi_serial_irq(struct uart_port *port,
63 struct acpi_resource_irq *irq)
64{
65 int rc;
66
67 if (irq->interrupt_count > 0) {
68 rc = acpi_register_gsi(irq->interrupts[0],
69 irq->triggering, irq->polarity);
70 if (rc < 0)
71 return AE_ERROR;
72 port->irq = rc;
73 }
74 return AE_OK;
75}
76
77static acpi_status acpi_serial_resource(struct acpi_resource *res, void *data)
78{
79 struct uart_port *port = (struct uart_port *) data;
80 struct acpi_resource_address64 addr;
81 acpi_status status;
82
83 status = acpi_resource_to_address64(res, &addr);
84 if (ACPI_SUCCESS(status))
85 return acpi_serial_mmio(port, &addr);
86 else if (res->type == ACPI_RESOURCE_TYPE_IO)
87 return acpi_serial_port(port, &res->data.io);
88 else if (res->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ)
89 return acpi_serial_ext_irq(port, &res->data.extended_irq);
90 else if (res->type == ACPI_RESOURCE_TYPE_IRQ)
91 return acpi_serial_irq(port, &res->data.irq);
92 return AE_OK;
93}
94
95static int acpi_serial_add(struct acpi_device *device)
96{
97 struct serial_private *priv;
98 acpi_status status;
99 struct uart_port port;
100 int result;
101
102 memset(&port, 0, sizeof(struct uart_port));
103
104 port.uartclk = 1843200;
105 port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF;
106
107 priv = kmalloc(sizeof(struct serial_private), GFP_KERNEL);
108 if (!priv) {
109 result = -ENOMEM;
110 goto fail;
111 }
112 memset(priv, 0, sizeof(*priv));
113
114 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
115 acpi_serial_resource, &port);
116 if (ACPI_FAILURE(status)) {
117 result = -ENODEV;
118 goto fail;
119 }
120
121 if (!port.mapbase && !port.iobase) {
122 printk(KERN_ERR "%s: no iomem or port address in %s _CRS\n",
123 __FUNCTION__, device->pnp.bus_id);
124 result = -ENODEV;
125 goto fail;
126 }
127
128 priv->line = serial8250_register_port(&port);
129 if (priv->line < 0) {
130 printk(KERN_WARNING "Couldn't register serial port %s: %d\n",
131 device->pnp.bus_id, priv->line);
132 result = -ENODEV;
133 goto fail;
134 }
135
136 acpi_driver_data(device) = priv;
137 return 0;
138
139fail:
140 kfree(priv);
141
142 return result;
143}
144
145static int acpi_serial_remove(struct acpi_device *device, int type)
146{
147 struct serial_private *priv;
148
149 if (!device || !acpi_driver_data(device))
150 return -EINVAL;
151
152 priv = acpi_driver_data(device);
153 serial8250_unregister_port(priv->line);
154 kfree(priv);
155
156 return 0;
157}
158
159static struct acpi_driver acpi_serial_driver = {
160 .name = "serial",
161 .class = "",
162 .ids = "PNP0501",
163 .ops = {
164 .add = acpi_serial_add,
165 .remove = acpi_serial_remove,
166 },
167};
168
169static int __init acpi_serial_init(void)
170{
171 return acpi_bus_register_driver(&acpi_serial_driver);
172}
173
174static void __exit acpi_serial_exit(void)
175{
176 acpi_bus_unregister_driver(&acpi_serial_driver);
177}
178
179module_init(acpi_serial_init);
180module_exit(acpi_serial_exit);
181
182MODULE_LICENSE("GPL");
183MODULE_DESCRIPTION("Generic 8250/16x50 ACPI serial driver");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-30 16:08:37 -0500