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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
4 <http://rt2x00.serialmonkey.com>
5
6 */
7
8/*
9 Module: rt2x00pci
10 Abstract: rt2x00 generic pci device routines.
11 */
12
13#include <linux/dma-mapping.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/pci.h>
17#include <linux/slab.h>
18
19#include "rt2x00.h"
20#include "rt2x00pci.h"
21
22/*
23 * PCI driver handlers.
24 */
25static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
26{
27 kfree(rt2x00dev->rf);
28 rt2x00dev->rf = NULL;
29
30 kfree(rt2x00dev->eeprom);
31 rt2x00dev->eeprom = NULL;
32
33 if (rt2x00dev->csr.base) {
34 iounmap(rt2x00dev->csr.base);
35 rt2x00dev->csr.base = NULL;
36 }
37}
38
39static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
40{
41 struct pci_dev *pci_dev = to_pci_dev(rt2x00dev->dev);
42
43 rt2x00dev->csr.base = pci_ioremap_bar(pci_dev, 0);
44 if (!rt2x00dev->csr.base)
45 goto exit;
46
47 rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
48 if (!rt2x00dev->eeprom)
49 goto exit;
50
51 rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
52 if (!rt2x00dev->rf)
53 goto exit;
54
55 return 0;
56
57exit:
58 rt2x00_probe_err("Failed to allocate registers\n");
59
60 rt2x00pci_free_reg(rt2x00dev);
61
62 return -ENOMEM;
63}
64
65int rt2x00pci_probe(struct pci_dev *pci_dev, const struct rt2x00_ops *ops)
66{
67 struct ieee80211_hw *hw;
68 struct rt2x00_dev *rt2x00dev;
69 int retval;
70 u16 chip;
71
72 retval = pci_enable_device(pci_dev);
73 if (retval) {
74 rt2x00_probe_err("Enable device failed\n");
75 return retval;
76 }
77
78 retval = pci_request_regions(pci_dev, pci_name(pci_dev));
79 if (retval) {
80 rt2x00_probe_err("PCI request regions failed\n");
81 goto exit_disable_device;
82 }
83
84 pci_set_master(pci_dev);
85
86 if (pci_set_mwi(pci_dev))
87 rt2x00_probe_err("MWI not available\n");
88
89 if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
90 rt2x00_probe_err("PCI DMA not supported\n");
91 retval = -EIO;
92 goto exit_release_regions;
93 }
94
95 hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
96 if (!hw) {
97 rt2x00_probe_err("Failed to allocate hardware\n");
98 retval = -ENOMEM;
99 goto exit_release_regions;
100 }
101
102 pci_set_drvdata(pci_dev, hw);
103
104 rt2x00dev = hw->priv;
105 rt2x00dev->dev = &pci_dev->dev;
106 rt2x00dev->ops = ops;
107 rt2x00dev->hw = hw;
108 rt2x00dev->irq = pci_dev->irq;
109 rt2x00dev->name = ops->name;
110
111 if (pci_is_pcie(pci_dev))
112 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
113 else
114 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI);
115
116 retval = rt2x00pci_alloc_reg(rt2x00dev);
117 if (retval)
118 goto exit_free_device;
119
120 /*
121 * Because rt3290 chip use different efuse offset to read efuse data.
122 * So before read efuse it need to indicate it is the
123 * rt3290 or not.
124 */
125 pci_read_config_word(pci_dev, PCI_DEVICE_ID, &chip);
126 rt2x00dev->chip.rt = chip;
127
128 retval = rt2x00lib_probe_dev(rt2x00dev);
129 if (retval)
130 goto exit_free_reg;
131
132 return 0;
133
134exit_free_reg:
135 rt2x00pci_free_reg(rt2x00dev);
136
137exit_free_device:
138 ieee80211_free_hw(hw);
139
140exit_release_regions:
141 pci_clear_mwi(pci_dev);
142 pci_release_regions(pci_dev);
143
144exit_disable_device:
145 pci_disable_device(pci_dev);
146
147 return retval;
148}
149EXPORT_SYMBOL_GPL(rt2x00pci_probe);
150
151void rt2x00pci_remove(struct pci_dev *pci_dev)
152{
153 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
154 struct rt2x00_dev *rt2x00dev = hw->priv;
155
156 /*
157 * Free all allocated data.
158 */
159 rt2x00lib_remove_dev(rt2x00dev);
160 rt2x00pci_free_reg(rt2x00dev);
161 ieee80211_free_hw(hw);
162
163 /*
164 * Free the PCI device data.
165 */
166 pci_clear_mwi(pci_dev);
167 pci_disable_device(pci_dev);
168 pci_release_regions(pci_dev);
169}
170EXPORT_SYMBOL_GPL(rt2x00pci_remove);
171
172static int __maybe_unused rt2x00pci_suspend(struct device *dev)
173{
174 struct ieee80211_hw *hw = dev_get_drvdata(dev);
175 struct rt2x00_dev *rt2x00dev = hw->priv;
176
177 return rt2x00lib_suspend(rt2x00dev);
178}
179
180static int __maybe_unused rt2x00pci_resume(struct device *dev)
181{
182 struct ieee80211_hw *hw = dev_get_drvdata(dev);
183 struct rt2x00_dev *rt2x00dev = hw->priv;
184
185 return rt2x00lib_resume(rt2x00dev);
186}
187
188SIMPLE_DEV_PM_OPS(rt2x00pci_pm_ops, rt2x00pci_suspend, rt2x00pci_resume);
189EXPORT_SYMBOL_GPL(rt2x00pci_pm_ops);
190
191/*
192 * rt2x00pci module information.
193 */
194MODULE_AUTHOR(DRV_PROJECT);
195MODULE_VERSION(DRV_VERSION);
196MODULE_DESCRIPTION("rt2x00 pci library");
197MODULE_LICENSE("GPL");
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 */
36static 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
50static 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
68exit:
69 rt2x00_probe_err("Failed to allocate registers\n");
70
71 rt2x00pci_free_reg(rt2x00dev);
72
73 return -ENOMEM;
74}
75
76int 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
145exit_free_reg:
146 rt2x00pci_free_reg(rt2x00dev);
147
148exit_free_device:
149 ieee80211_free_hw(hw);
150
151exit_release_regions:
152 pci_clear_mwi(pci_dev);
153 pci_release_regions(pci_dev);
154
155exit_disable_device:
156 pci_disable_device(pci_dev);
157
158 return retval;
159}
160EXPORT_SYMBOL_GPL(rt2x00pci_probe);
161
162void rt2x00pci_remove(struct pci_dev *pci_dev)
163{
164 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
165 struct rt2x00_dev *rt2x00dev = hw->priv;
166
167 /*
168 * Free all allocated data.
169 */
170 rt2x00lib_remove_dev(rt2x00dev);
171 rt2x00pci_free_reg(rt2x00dev);
172 ieee80211_free_hw(hw);
173
174 /*
175 * Free the PCI device data.
176 */
177 pci_clear_mwi(pci_dev);
178 pci_disable_device(pci_dev);
179 pci_release_regions(pci_dev);
180}
181EXPORT_SYMBOL_GPL(rt2x00pci_remove);
182
183#ifdef CONFIG_PM
184int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
185{
186 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
187 struct rt2x00_dev *rt2x00dev = hw->priv;
188 int retval;
189
190 retval = rt2x00lib_suspend(rt2x00dev, state);
191 if (retval)
192 return retval;
193
194 pci_save_state(pci_dev);
195 pci_disable_device(pci_dev);
196 return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
197}
198EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
199
200int rt2x00pci_resume(struct pci_dev *pci_dev)
201{
202 struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
203 struct rt2x00_dev *rt2x00dev = hw->priv;
204
205 if (pci_set_power_state(pci_dev, PCI_D0) ||
206 pci_enable_device(pci_dev)) {
207 rt2x00_err(rt2x00dev, "Failed to resume device\n");
208 return -EIO;
209 }
210
211 pci_restore_state(pci_dev);
212 return rt2x00lib_resume(rt2x00dev);
213}
214EXPORT_SYMBOL_GPL(rt2x00pci_resume);
215#endif /* CONFIG_PM */
216
217/*
218 * rt2x00pci module information.
219 */
220MODULE_AUTHOR(DRV_PROJECT);
221MODULE_VERSION(DRV_VERSION);
222MODULE_DESCRIPTION("rt2x00 pci library");
223MODULE_LICENSE("GPL");