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  */
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 
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 
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 
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 
172 #ifdef CONFIG_PM
173 int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
174 {
175 	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
176 	struct rt2x00_dev *rt2x00dev = hw->priv;
177 	int retval;
178 
179 	retval = rt2x00lib_suspend(rt2x00dev, state);
180 	if (retval)
181 		return retval;
182 
183 	pci_save_state(pci_dev);
184 	pci_disable_device(pci_dev);
185 	return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
186 }
187 EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
188 
189 int rt2x00pci_resume(struct pci_dev *pci_dev)
190 {
191 	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
192 	struct rt2x00_dev *rt2x00dev = hw->priv;
193 
194 	if (pci_set_power_state(pci_dev, PCI_D0) ||
195 	    pci_enable_device(pci_dev)) {
196 		rt2x00_err(rt2x00dev, "Failed to resume device\n");
197 		return -EIO;
198 	}
199 
200 	pci_restore_state(pci_dev);
201 	return rt2x00lib_resume(rt2x00dev);
202 }
203 EXPORT_SYMBOL_GPL(rt2x00pci_resume);
204 #endif /* CONFIG_PM */
205 
206 /*
207  * rt2x00pci module information.
208  */
209 MODULE_AUTHOR(DRV_PROJECT);
210 MODULE_VERSION(DRV_VERSION);
211 MODULE_DESCRIPTION("rt2x00 pci library");
212 MODULE_LICENSE("GPL");
213