1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
4 	Copyright (C) 2004 - 2009 Felix Fietkau <nbd@openwrt.org>
5 	<http://rt2x00.serialmonkey.com>
6 
7  */
8 
9 /*
10 	Module: rt2x00soc
11 	Abstract: rt2x00 generic soc device routines.
12  */
13 
14 #include <linux/bug.h>
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/platform_device.h>
18 #include <linux/slab.h>
19 
20 #include "rt2x00.h"
21 #include "rt2x00soc.h"
22 
23 static void rt2x00soc_free_reg(struct rt2x00_dev *rt2x00dev)
24 {
25 	kfree(rt2x00dev->rf);
26 	rt2x00dev->rf = NULL;
27 
28 	kfree(rt2x00dev->eeprom);
29 	rt2x00dev->eeprom = NULL;
30 
31 	iounmap(rt2x00dev->csr.base);
32 }
33 
34 static int rt2x00soc_alloc_reg(struct rt2x00_dev *rt2x00dev)
35 {
36 	struct platform_device *pdev = to_platform_device(rt2x00dev->dev);
37 	struct resource *res;
38 
39 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
40 	if (!res)
41 		return -ENODEV;
42 
43 	rt2x00dev->csr.base = ioremap(res->start, resource_size(res));
44 	if (!rt2x00dev->csr.base)
45 		return -ENOMEM;
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 	rt2x00soc_free_reg(rt2x00dev);
60 
61 	return -ENOMEM;
62 }
63 
64 int rt2x00soc_probe(struct platform_device *pdev, const struct rt2x00_ops *ops)
65 {
66 	struct ieee80211_hw *hw;
67 	struct rt2x00_dev *rt2x00dev;
68 	int retval;
69 
70 	hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
71 	if (!hw) {
72 		rt2x00_probe_err("Failed to allocate hardware\n");
73 		return -ENOMEM;
74 	}
75 
76 	platform_set_drvdata(pdev, hw);
77 
78 	rt2x00dev = hw->priv;
79 	rt2x00dev->dev = &pdev->dev;
80 	rt2x00dev->ops = ops;
81 	rt2x00dev->hw = hw;
82 	rt2x00dev->irq = platform_get_irq(pdev, 0);
83 	rt2x00dev->name = pdev->dev.driver->name;
84 
85 	rt2x00dev->clk = clk_get(&pdev->dev, NULL);
86 	if (IS_ERR(rt2x00dev->clk))
87 		rt2x00dev->clk = NULL;
88 
89 	rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);
90 
91 	retval = rt2x00soc_alloc_reg(rt2x00dev);
92 	if (retval)
93 		goto exit_free_device;
94 
95 	retval = rt2x00lib_probe_dev(rt2x00dev);
96 	if (retval)
97 		goto exit_free_reg;
98 
99 	return 0;
100 
101 exit_free_reg:
102 	rt2x00soc_free_reg(rt2x00dev);
103 
104 exit_free_device:
105 	ieee80211_free_hw(hw);
106 
107 	return retval;
108 }
109 EXPORT_SYMBOL_GPL(rt2x00soc_probe);
110 
111 int rt2x00soc_remove(struct platform_device *pdev)
112 {
113 	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
114 	struct rt2x00_dev *rt2x00dev = hw->priv;
115 
116 	/*
117 	 * Free all allocated data.
118 	 */
119 	rt2x00lib_remove_dev(rt2x00dev);
120 	rt2x00soc_free_reg(rt2x00dev);
121 	ieee80211_free_hw(hw);
122 
123 	return 0;
124 }
125 EXPORT_SYMBOL_GPL(rt2x00soc_remove);
126 
127 #ifdef CONFIG_PM
128 int rt2x00soc_suspend(struct platform_device *pdev, pm_message_t state)
129 {
130 	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
131 	struct rt2x00_dev *rt2x00dev = hw->priv;
132 
133 	return rt2x00lib_suspend(rt2x00dev, state);
134 }
135 EXPORT_SYMBOL_GPL(rt2x00soc_suspend);
136 
137 int rt2x00soc_resume(struct platform_device *pdev)
138 {
139 	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
140 	struct rt2x00_dev *rt2x00dev = hw->priv;
141 
142 	return rt2x00lib_resume(rt2x00dev);
143 }
144 EXPORT_SYMBOL_GPL(rt2x00soc_resume);
145 #endif /* CONFIG_PM */
146 
147 /*
148  * rt2x00soc module information.
149  */
150 MODULE_AUTHOR(DRV_PROJECT);
151 MODULE_VERSION(DRV_VERSION);
152 MODULE_DESCRIPTION("rt2x00 soc library");
153 MODULE_LICENSE("GPL");
154