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 };
40
41 /* return bus cachesize in 4B word units */
ath_ahb_read_cachesize(struct ath_common * common,int * csz)42 static void ath_ahb_read_cachesize(struct ath_common *common, int *csz)
43 {
44 *csz = L1_CACHE_BYTES >> 2;
45 }
46
ath_ahb_eeprom_read(struct ath_common * common,u32 off,u16 * data)47 static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
48 {
49 struct ath_softc *sc = (struct ath_softc *)common->priv;
50 struct platform_device *pdev = to_platform_device(sc->dev);
51 struct ath9k_platform_data *pdata;
52
53 pdata = (struct ath9k_platform_data *) pdev->dev.platform_data;
54 if (off >= (ARRAY_SIZE(pdata->eeprom_data))) {
55 ath_err(common,
56 "%s: flash read failed, offset %08x is out of range\n",
57 __func__, off);
58 return false;
59 }
60
61 *data = pdata->eeprom_data[off];
62 return true;
63 }
64
65 static struct ath_bus_ops ath_ahb_bus_ops = {
66 .ath_bus_type = ATH_AHB,
67 .read_cachesize = ath_ahb_read_cachesize,
68 .eeprom_read = ath_ahb_eeprom_read,
69 };
70
ath_ahb_probe(struct platform_device * pdev)71 static int ath_ahb_probe(struct platform_device *pdev)
72 {
73 void __iomem *mem;
74 struct ath_softc *sc;
75 struct ieee80211_hw *hw;
76 struct resource *res;
77 const struct platform_device_id *id = platform_get_device_id(pdev);
78 int irq;
79 int ret = 0;
80 struct ath_hw *ah;
81 char hw_name[64];
82
83 if (!pdev->dev.platform_data) {
84 dev_err(&pdev->dev, "no platform data specified\n");
85 ret = -EINVAL;
86 goto err_out;
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 ret = -ENXIO;
93 goto err_out;
94 }
95
96 mem = ioremap_nocache(res->start, resource_size(res));
97 if (mem == NULL) {
98 dev_err(&pdev->dev, "ioremap failed\n");
99 ret = -ENOMEM;
100 goto err_out;
101 }
102
103 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
104 if (res == NULL) {
105 dev_err(&pdev->dev, "no IRQ resource found\n");
106 ret = -ENXIO;
107 goto err_iounmap;
108 }
109
110 irq = res->start;
111
112 hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
113 if (hw == NULL) {
114 dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
115 ret = -ENOMEM;
116 goto err_iounmap;
117 }
118
119 SET_IEEE80211_DEV(hw, &pdev->dev);
120 platform_set_drvdata(pdev, hw);
121
122 sc = hw->priv;
123 sc->hw = hw;
124 sc->dev = &pdev->dev;
125 sc->mem = mem;
126 sc->irq = irq;
127
128 /* Will be cleared in ath9k_start() */
129 sc->sc_flags |= SC_OP_INVALID;
130
131 ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
132 if (ret) {
133 dev_err(&pdev->dev, "request_irq failed\n");
134 goto err_free_hw;
135 }
136
137 ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops);
138 if (ret) {
139 dev_err(&pdev->dev, "failed to initialize device\n");
140 goto err_irq;
141 }
142
143 ah = sc->sc_ah;
144 ath9k_hw_name(ah, hw_name, sizeof(hw_name));
145 wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
146 hw_name, (unsigned long)mem, irq);
147
148 return 0;
149
150 err_irq:
151 free_irq(irq, sc);
152 err_free_hw:
153 ieee80211_free_hw(hw);
154 platform_set_drvdata(pdev, NULL);
155 err_iounmap:
156 iounmap(mem);
157 err_out:
158 return ret;
159 }
160
ath_ahb_remove(struct platform_device * pdev)161 static int ath_ahb_remove(struct platform_device *pdev)
162 {
163 struct ieee80211_hw *hw = platform_get_drvdata(pdev);
164
165 if (hw) {
166 struct ath_softc *sc = hw->priv;
167 void __iomem *mem = sc->mem;
168
169 ath9k_deinit_device(sc);
170 free_irq(sc->irq, sc);
171 ieee80211_free_hw(sc->hw);
172 iounmap(mem);
173 platform_set_drvdata(pdev, NULL);
174 }
175
176 return 0;
177 }
178
179 static struct platform_driver ath_ahb_driver = {
180 .probe = ath_ahb_probe,
181 .remove = ath_ahb_remove,
182 .driver = {
183 .name = "ath9k",
184 .owner = THIS_MODULE,
185 },
186 .id_table = ath9k_platform_id_table,
187 };
188
189 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table);
190
ath_ahb_init(void)191 int ath_ahb_init(void)
192 {
193 return platform_driver_register(&ath_ahb_driver);
194 }
195
ath_ahb_exit(void)196 void ath_ahb_exit(void)
197 {
198 platform_driver_unregister(&ath_ahb_driver);
199 }
200