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/ath9k_platform.h>
22 #include <linux/module.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 };
48
49 /* return bus cachesize in 4B word units */
ath_ahb_read_cachesize(struct ath_common * common,int * csz)50 static void ath_ahb_read_cachesize(struct ath_common *common, int *csz)
51 {
52 *csz = L1_CACHE_BYTES >> 2;
53 }
54
ath_ahb_eeprom_read(struct ath_common * common,u32 off,u16 * data)55 static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
56 {
57 struct ath_softc *sc = (struct ath_softc *)common->priv;
58 struct platform_device *pdev = to_platform_device(sc->dev);
59 struct ath9k_platform_data *pdata;
60
61 pdata = dev_get_platdata(&pdev->dev);
62 if (off >= (ARRAY_SIZE(pdata->eeprom_data))) {
63 ath_err(common,
64 "%s: flash read failed, offset %08x is out of range\n",
65 __func__, off);
66 return false;
67 }
68
69 *data = pdata->eeprom_data[off];
70 return true;
71 }
72
73 static struct ath_bus_ops ath_ahb_bus_ops = {
74 .ath_bus_type = ATH_AHB,
75 .read_cachesize = ath_ahb_read_cachesize,
76 .eeprom_read = ath_ahb_eeprom_read,
77 };
78
ath_ahb_probe(struct platform_device * pdev)79 static int ath_ahb_probe(struct platform_device *pdev)
80 {
81 void __iomem *mem;
82 struct ath_softc *sc;
83 struct ieee80211_hw *hw;
84 struct resource *res;
85 const struct platform_device_id *id = platform_get_device_id(pdev);
86 int irq;
87 int ret = 0;
88 struct ath_hw *ah;
89 char hw_name[64];
90
91 if (!dev_get_platdata(&pdev->dev)) {
92 dev_err(&pdev->dev, "no platform data specified\n");
93 return -EINVAL;
94 }
95
96 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
97 if (res == NULL) {
98 dev_err(&pdev->dev, "no memory resource found\n");
99 return -ENXIO;
100 }
101
102 mem = devm_ioremap_nocache(&pdev->dev, res->start, resource_size(res));
103 if (mem == NULL) {
104 dev_err(&pdev->dev, "ioremap failed\n");
105 return -ENOMEM;
106 }
107
108 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
109 if (res == NULL) {
110 dev_err(&pdev->dev, "no IRQ resource found\n");
111 return -ENXIO;
112 }
113
114 irq = res->start;
115
116 ath9k_fill_chanctx_ops();
117 hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
118 if (hw == NULL) {
119 dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
120 return -ENOMEM;
121 }
122
123 SET_IEEE80211_DEV(hw, &pdev->dev);
124 platform_set_drvdata(pdev, hw);
125
126 sc = hw->priv;
127 sc->hw = hw;
128 sc->dev = &pdev->dev;
129 sc->mem = mem;
130 sc->irq = irq;
131
132 ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
133 if (ret) {
134 dev_err(&pdev->dev, "request_irq failed\n");
135 goto err_free_hw;
136 }
137
138 ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops);
139 if (ret) {
140 dev_err(&pdev->dev, "failed to initialize device\n");
141 goto err_irq;
142 }
143
144 ah = sc->sc_ah;
145 ath9k_hw_name(ah, hw_name, sizeof(hw_name));
146 wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
147 hw_name, (unsigned long)mem, irq);
148
149 return 0;
150
151 err_irq:
152 free_irq(irq, sc);
153 err_free_hw:
154 ieee80211_free_hw(hw);
155 return ret;
156 }
157
ath_ahb_remove(struct platform_device * pdev)158 static int ath_ahb_remove(struct platform_device *pdev)
159 {
160 struct ieee80211_hw *hw = platform_get_drvdata(pdev);
161
162 if (hw) {
163 struct ath_softc *sc = hw->priv;
164
165 ath9k_deinit_device(sc);
166 free_irq(sc->irq, sc);
167 ieee80211_free_hw(sc->hw);
168 }
169
170 return 0;
171 }
172
173 static struct platform_driver ath_ahb_driver = {
174 .probe = ath_ahb_probe,
175 .remove = ath_ahb_remove,
176 .driver = {
177 .name = "ath9k",
178 .owner = THIS_MODULE,
179 },
180 .id_table = ath9k_platform_id_table,
181 };
182
183 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table);
184
ath_ahb_init(void)185 int ath_ahb_init(void)
186 {
187 return platform_driver_register(&ath_ahb_driver);
188 }
189
ath_ahb_exit(void)190 void ath_ahb_exit(void)
191 {
192 platform_driver_unregister(&ath_ahb_driver);
193 }
194