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, see <http://www.gnu.org/licenses/>.
17 */
18
19 /*
20 Module: rt2x00pci
21 Abstract: rt2x00 generic pci device routines.
22 */
23
24 #include <linux/dma-mapping.h>
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/pci.h>
28 #include <linux/slab.h>
29
30 #include "rt2x00.h"
31 #include "rt2x00pci.h"
32
33 /*
34 * PCI driver handlers.
35 */
rt2x00pci_free_reg(struct rt2x00_dev * rt2x00dev)36 static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
37 {
38 kfree(rt2x00dev->rf);
39 rt2x00dev->rf = NULL;
40
41 kfree(rt2x00dev->eeprom);
42 rt2x00dev->eeprom = NULL;
43
44 if (rt2x00dev->csr.base) {
45 iounmap(rt2x00dev->csr.base);
46 rt2x00dev->csr.base = NULL;
47 }
48 }
49
rt2x00pci_alloc_reg(struct rt2x00_dev * rt2x00dev)50 static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
51 {
52 struct pci_dev *pci_dev = to_pci_dev(rt2x00dev->dev);
53
54 rt2x00dev->csr.base = pci_ioremap_bar(pci_dev, 0);
55 if (!rt2x00dev->csr.base)
56 goto exit;
57
58 rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
59 if (!rt2x00dev->eeprom)
60 goto exit;
61
62 rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
63 if (!rt2x00dev->rf)
64 goto exit;
65
66 return 0;
67
68 exit:
69 rt2x00_probe_err("Failed to allocate registers\n");
70
71 rt2x00pci_free_reg(rt2x00dev);
72
73 return -ENOMEM;
74 }
75
rt2x00pci_probe(struct pci_dev * pci_dev,const struct rt2x00_ops * ops)76 int rt2x00pci_probe(struct pci_dev *pci_dev, const struct rt2x00_ops *ops)
77 {
78 struct ieee80211_hw *hw;
79 struct rt2x00_dev *rt2x00dev;
80 int retval;
81 u16 chip;
82
83 retval = pci_enable_device(pci_dev);
84 if (retval) {
85 rt2x00_probe_err("Enable device failed\n");
86 return retval;
87 }
88
89 retval = pci_request_regions(pci_dev, pci_name(pci_dev));
90 if (retval) {
91 rt2x00_probe_err("PCI request regions failed\n");
92 goto exit_disable_device;
93 }
94
95 pci_set_master(pci_dev);
96
97 if (pci_set_mwi(pci_dev))
98 rt2x00_probe_err("MWI not available\n");
99
100 if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
101 rt2x00_probe_err("PCI DMA not supported\n");
102 retval = -EIO;
103 goto exit_release_regions;
104 }
105
106 hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
107 if (!hw) {
108 rt2x00_probe_err("Failed to allocate hardware\n");
109 retval = -ENOMEM;
110 goto exit_release_regions;
111 }
112
113 pci_set_drvdata(pci_dev, hw);
114
115 rt2x00dev = hw->priv;
116 rt2x00dev->dev = &pci_dev->dev;
117 rt2x00dev->ops = ops;
118 rt2x00dev->hw = hw;
119 rt2x00dev->irq = pci_dev->irq;
120 rt2x00dev->name = ops->name;
121
122 if (pci_is_pcie(pci_dev))
123 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
124 else
125 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI);
126
127 retval = rt2x00pci_alloc_reg(rt2x00dev);
128 if (retval)
129 goto exit_free_device;
130
131 /*
132 * Because rt3290 chip use different efuse offset to read efuse data.
133 * So before read efuse it need to indicate it is the
134 * rt3290 or not.
135 */
136 pci_read_config_word(pci_dev, PCI_DEVICE_ID, &chip);
137 rt2x00dev->chip.rt = chip;
138
139 retval = rt2x00lib_probe_dev(rt2x00dev);
140 if (retval)
141 goto exit_free_reg;
142
143 return 0;
144
145 exit_free_reg:
146 rt2x00pci_free_reg(rt2x00dev);
147
148 exit_free_device:
149 ieee80211_free_hw(hw);
150
151 exit_release_regions:
152 pci_release_regions(pci_dev);
153
154 exit_disable_device:
155 pci_disable_device(pci_dev);
156
157 return retval;
158 }
159 EXPORT_SYMBOL_GPL(rt2x00pci_probe);
160
rt2x00pci_remove(struct pci_dev * pci_dev)161 void rt2x00pci_remove(struct pci_dev *pci_dev)
162 {
163 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
164 struct rt2x00_dev *rt2x00dev = hw->priv;
165
166 /*
167 * Free all allocated data.
168 */
169 rt2x00lib_remove_dev(rt2x00dev);
170 rt2x00pci_free_reg(rt2x00dev);
171 ieee80211_free_hw(hw);
172
173 /*
174 * Free the PCI device data.
175 */
176 pci_disable_device(pci_dev);
177 pci_release_regions(pci_dev);
178 }
179 EXPORT_SYMBOL_GPL(rt2x00pci_remove);
180
181 #ifdef CONFIG_PM
rt2x00pci_suspend(struct pci_dev * pci_dev,pm_message_t state)182 int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
183 {
184 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
185 struct rt2x00_dev *rt2x00dev = hw->priv;
186 int retval;
187
188 retval = rt2x00lib_suspend(rt2x00dev, state);
189 if (retval)
190 return retval;
191
192 pci_save_state(pci_dev);
193 pci_disable_device(pci_dev);
194 return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
195 }
196 EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
197
rt2x00pci_resume(struct pci_dev * pci_dev)198 int rt2x00pci_resume(struct pci_dev *pci_dev)
199 {
200 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
201 struct rt2x00_dev *rt2x00dev = hw->priv;
202
203 if (pci_set_power_state(pci_dev, PCI_D0) ||
204 pci_enable_device(pci_dev)) {
205 rt2x00_err(rt2x00dev, "Failed to resume device\n");
206 return -EIO;
207 }
208
209 pci_restore_state(pci_dev);
210 return rt2x00lib_resume(rt2x00dev);
211 }
212 EXPORT_SYMBOL_GPL(rt2x00pci_resume);
213 #endif /* CONFIG_PM */
214
215 /*
216 * rt2x00pci module information.
217 */
218 MODULE_AUTHOR(DRV_PROJECT);
219 MODULE_VERSION(DRV_VERSION);
220 MODULE_DESCRIPTION("rt2x00 pci library");
221 MODULE_LICENSE("GPL");
222