xref: /openbmc/linux/drivers/net/wireless/ath/ath9k/ahb.c (revision 2a598d0b)
1 /*
2  * Copyright (c) 2008-2011 Atheros Communications Inc.
3  * Copyright (c) 2009 Gabor Juhos <juhosg@openwrt.org>
4  * Copyright (c) 2009 Imre Kaloz <kaloz@openwrt.org>
5  *
6  * Permission to use, copy, modify, and/or distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 
19 #include <linux/nl80211.h>
20 #include <linux/platform_device.h>
21 #include <linux/module.h>
22 #include <linux/mod_devicetable.h>
23 #include "ath9k.h"
24 
25 static const struct platform_device_id ath9k_platform_id_table[] = {
26 	{
27 		.name = "ath9k",
28 		.driver_data = AR5416_AR9100_DEVID,
29 	},
30 	{
31 		.name = "ar933x_wmac",
32 		.driver_data = AR9300_DEVID_AR9330,
33 	},
34 	{
35 		.name = "ar934x_wmac",
36 		.driver_data = AR9300_DEVID_AR9340,
37 	},
38 	{
39 		.name = "qca955x_wmac",
40 		.driver_data = AR9300_DEVID_QCA955X,
41 	},
42 	{
43 		.name = "qca953x_wmac",
44 		.driver_data = AR9300_DEVID_AR953X,
45 	},
46 	{
47 		.name = "qca956x_wmac",
48 		.driver_data = AR9300_DEVID_QCA956X,
49 	},
50 	{},
51 };
52 
53 /* return bus cachesize in 4B word units */
54 static void ath_ahb_read_cachesize(struct ath_common *common, int *csz)
55 {
56 	*csz = L1_CACHE_BYTES >> 2;
57 }
58 
59 static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
60 {
61 	ath_err(common, "%s: eeprom data has to be provided externally\n",
62 		__func__);
63 	return false;
64 }
65 
66 static const struct ath_bus_ops ath_ahb_bus_ops  = {
67 	.ath_bus_type = ATH_AHB,
68 	.read_cachesize = ath_ahb_read_cachesize,
69 	.eeprom_read = ath_ahb_eeprom_read,
70 };
71 
72 static int ath_ahb_probe(struct platform_device *pdev)
73 {
74 	void __iomem *mem;
75 	struct ath_softc *sc;
76 	struct ieee80211_hw *hw;
77 	struct resource *res;
78 	const struct platform_device_id *id = platform_get_device_id(pdev);
79 	int irq;
80 	int ret = 0;
81 	struct ath_hw *ah;
82 	char hw_name[64];
83 
84 	if (!dev_get_platdata(&pdev->dev)) {
85 		dev_err(&pdev->dev, "no platform data specified\n");
86 		return -EINVAL;
87 	}
88 
89 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
90 	if (res == NULL) {
91 		dev_err(&pdev->dev, "no memory resource found\n");
92 		return -ENXIO;
93 	}
94 
95 	mem = devm_ioremap(&pdev->dev, res->start, resource_size(res));
96 	if (mem == NULL) {
97 		dev_err(&pdev->dev, "ioremap failed\n");
98 		return -ENOMEM;
99 	}
100 
101 	irq = platform_get_irq(pdev, 0);
102 	if (irq < 0)
103 		return irq;
104 
105 	ath9k_fill_chanctx_ops();
106 	hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
107 	if (hw == NULL) {
108 		dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
109 		return -ENOMEM;
110 	}
111 
112 	SET_IEEE80211_DEV(hw, &pdev->dev);
113 	platform_set_drvdata(pdev, hw);
114 
115 	sc = hw->priv;
116 	sc->hw = hw;
117 	sc->dev = &pdev->dev;
118 	sc->mem = mem;
119 	sc->irq = irq;
120 
121 	ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
122 	if (ret) {
123 		dev_err(&pdev->dev, "request_irq failed\n");
124 		goto err_free_hw;
125 	}
126 
127 	ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops);
128 	if (ret) {
129 		dev_err(&pdev->dev, "failed to initialize device\n");
130 		goto err_irq;
131 	}
132 
133 	ah = sc->sc_ah;
134 	ath9k_hw_name(ah, hw_name, sizeof(hw_name));
135 	wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
136 		   hw_name, (unsigned long)mem, irq);
137 
138 	return 0;
139 
140  err_irq:
141 	free_irq(irq, sc);
142  err_free_hw:
143 	ieee80211_free_hw(hw);
144 	return ret;
145 }
146 
147 static int ath_ahb_remove(struct platform_device *pdev)
148 {
149 	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
150 
151 	if (hw) {
152 		struct ath_softc *sc = hw->priv;
153 
154 		ath9k_deinit_device(sc);
155 		free_irq(sc->irq, sc);
156 		ieee80211_free_hw(sc->hw);
157 	}
158 
159 	return 0;
160 }
161 
162 static struct platform_driver ath_ahb_driver = {
163 	.probe      = ath_ahb_probe,
164 	.remove     = ath_ahb_remove,
165 	.driver		= {
166 		.name	= "ath9k",
167 	},
168 	.id_table    = ath9k_platform_id_table,
169 };
170 
171 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table);
172 
173 int ath_ahb_init(void)
174 {
175 	return platform_driver_register(&ath_ahb_driver);
176 }
177 
178 void ath_ahb_exit(void)
179 {
180 	platform_driver_unregister(&ath_ahb_driver);
181 }
182