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");
198