tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
3 <http://rt2x00.serialmonkey.com>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the
17 Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21/*
22 Module: rt2x00pci
23 Abstract: rt2x00 generic pci device routines.
24 */
25
26#include <linux/dma-mapping.h>
27#include <linux/kernel.h>
28#include <linux/module.h>
29#include <linux/pci.h>
30#include <linux/slab.h>
31
32#include "rt2x00.h"
33#include "rt2x00pci.h"
34
35/*
36 * PCI driver handlers.
37 */
38static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
39{
40 kfree(rt2x00dev->rf);
41 rt2x00dev->rf = NULL;
42
43 kfree(rt2x00dev->eeprom);
44 rt2x00dev->eeprom = NULL;
45
46 if (rt2x00dev->csr.base) {
47 iounmap(rt2x00dev->csr.base);
48 rt2x00dev->csr.base = NULL;
49 }
50}
51
52static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
53{
54 struct pci_dev *pci_dev = to_pci_dev(rt2x00dev->dev);
55
56 rt2x00dev->csr.base = pci_ioremap_bar(pci_dev, 0);
57 if (!rt2x00dev->csr.base)
58 goto exit;
59
60 rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
61 if (!rt2x00dev->eeprom)
62 goto exit;
63
64 rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
65 if (!rt2x00dev->rf)
66 goto exit;
67
68 return 0;
69
70exit:
71 rt2x00_probe_err("Failed to allocate registers\n");
72
73 rt2x00pci_free_reg(rt2x00dev);
74
75 return -ENOMEM;
76}
77
78int rt2x00pci_probe(struct pci_dev *pci_dev, const struct rt2x00_ops *ops)
79{
80 struct ieee80211_hw *hw;
81 struct rt2x00_dev *rt2x00dev;
82 int retval;
83 u16 chip;
84
85 retval = pci_enable_device(pci_dev);
86 if (retval) {
87 rt2x00_probe_err("Enable device failed\n");
88 return retval;
89 }
90
91 retval = pci_request_regions(pci_dev, pci_name(pci_dev));
92 if (retval) {
93 rt2x00_probe_err("PCI request regions failed\n");
94 goto exit_disable_device;
95 }
96
97 pci_set_master(pci_dev);
98
99 if (pci_set_mwi(pci_dev))
100 rt2x00_probe_err("MWI not available\n");
101
102 if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
103 rt2x00_probe_err("PCI DMA not supported\n");
104 retval = -EIO;
105 goto exit_release_regions;
106 }
107
108 hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
109 if (!hw) {
110 rt2x00_probe_err("Failed to allocate hardware\n");
111 retval = -ENOMEM;
112 goto exit_release_regions;
113 }
114
115 pci_set_drvdata(pci_dev, hw);
116
117 rt2x00dev = hw->priv;
118 rt2x00dev->dev = &pci_dev->dev;
119 rt2x00dev->ops = ops;
120 rt2x00dev->hw = hw;
121 rt2x00dev->irq = pci_dev->irq;
122 rt2x00dev->name = ops->name;
123
124 if (pci_is_pcie(pci_dev))
125 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
126 else
127 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI);
128
129 retval = rt2x00pci_alloc_reg(rt2x00dev);
130 if (retval)
131 goto exit_free_device;
132
133 /*
134 * Because rt3290 chip use different efuse offset to read efuse data.
135 * So before read efuse it need to indicate it is the
136 * rt3290 or not.
137 */
138 pci_read_config_word(pci_dev, PCI_DEVICE_ID, &chip);
139 rt2x00dev->chip.rt = chip;
140
141 retval = rt2x00lib_probe_dev(rt2x00dev);
142 if (retval)
143 goto exit_free_reg;
144
145 return 0;
146
147exit_free_reg:
148 rt2x00pci_free_reg(rt2x00dev);
149
150exit_free_device:
151 ieee80211_free_hw(hw);
152
153exit_release_regions:
154 pci_release_regions(pci_dev);
155
156exit_disable_device:
157 pci_disable_device(pci_dev);
158
159 pci_set_drvdata(pci_dev, NULL);
160
161 return retval;
162}
163EXPORT_SYMBOL_GPL(rt2x00pci_probe);
164
165void rt2x00pci_remove(struct pci_dev *pci_dev)
166{
167 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
168 struct rt2x00_dev *rt2x00dev = hw->priv;
169
170 /*
171 * Free all allocated data.
172 */
173 rt2x00lib_remove_dev(rt2x00dev);
174 rt2x00pci_free_reg(rt2x00dev);
175 ieee80211_free_hw(hw);
176
177 /*
178 * Free the PCI device data.
179 */
180 pci_set_drvdata(pci_dev, NULL);
181 pci_disable_device(pci_dev);
182 pci_release_regions(pci_dev);
183}
184EXPORT_SYMBOL_GPL(rt2x00pci_remove);
185
186#ifdef CONFIG_PM
187int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
188{
189 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
190 struct rt2x00_dev *rt2x00dev = hw->priv;
191 int retval;
192
193 retval = rt2x00lib_suspend(rt2x00dev, state);
194 if (retval)
195 return retval;
196
197 pci_save_state(pci_dev);
198 pci_disable_device(pci_dev);
199 return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
200}
201EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
202
203int rt2x00pci_resume(struct pci_dev *pci_dev)
204{
205 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
206 struct rt2x00_dev *rt2x00dev = hw->priv;
207
208 if (pci_set_power_state(pci_dev, PCI_D0) ||
209 pci_enable_device(pci_dev)) {
210 rt2x00_err(rt2x00dev, "Failed to resume device\n");
211 return -EIO;
212 }
213
214 pci_restore_state(pci_dev);
215 return rt2x00lib_resume(rt2x00dev);
216}
217EXPORT_SYMBOL_GPL(rt2x00pci_resume);
218#endif /* CONFIG_PM */
219
220/*
221 * rt2x00pci module information.
222 */
223MODULE_AUTHOR(DRV_PROJECT);
224MODULE_VERSION(DRV_VERSION);
225MODULE_DESCRIPTION("rt2x00 pci library");
226MODULE_LICENSE("GPL");