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 */
rt2x00pci_free_reg(struct rt2x00_dev * rt2x00dev)25 static 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
rt2x00pci_alloc_reg(struct rt2x00_dev * rt2x00dev)39 static 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
57 exit:
58 rt2x00_probe_err("Failed to allocate registers\n");
59
60 rt2x00pci_free_reg(rt2x00dev);
61
62 return -ENOMEM;
63 }
64
rt2x00pci_probe(struct pci_dev * pci_dev,const struct rt2x00_ops * ops)65 int 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
134 exit_free_reg:
135 rt2x00pci_free_reg(rt2x00dev);
136
137 exit_free_device:
138 ieee80211_free_hw(hw);
139
140 exit_release_regions:
141 pci_clear_mwi(pci_dev);
142 pci_release_regions(pci_dev);
143
144 exit_disable_device:
145 pci_disable_device(pci_dev);
146
147 return retval;
148 }
149 EXPORT_SYMBOL_GPL(rt2x00pci_probe);
150
rt2x00pci_remove(struct pci_dev * pci_dev)151 void 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 }
170 EXPORT_SYMBOL_GPL(rt2x00pci_remove);
171
rt2x00pci_suspend(struct device * dev)172 static 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
rt2x00pci_resume(struct device * dev)180 static 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
188 SIMPLE_DEV_PM_OPS(rt2x00pci_pm_ops, rt2x00pci_suspend, rt2x00pci_resume);
189 EXPORT_SYMBOL_GPL(rt2x00pci_pm_ops);
190
191 /*
192 * rt2x00pci module information.
193 */
194 MODULE_AUTHOR(DRV_PROJECT);
195 MODULE_VERSION(DRV_VERSION);
196 MODULE_DESCRIPTION("rt2x00 pci library");
197 MODULE_LICENSE("GPL");
198
