1 /*
2 * Copyright (c) 2008-2009 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 "ath9k.h"
23
24 /* return bus cachesize in 4B word units */
25 static void ath_ahb_read_cachesize(struct ath_softc *sc, int *csz)
26 {
27 *csz = L1_CACHE_BYTES >> 2;
28 }
29
30 static void ath_ahb_cleanup(struct ath_softc *sc)
31 {
32 iounmap(sc->mem);
33 }
34
35 static bool ath_ahb_eeprom_read(struct ath_hw *ah, u32 off, u16 *data)
36 {
37 struct ath_softc *sc = ah->ah_sc;
38 struct platform_device *pdev = to_platform_device(sc->dev);
39 struct ath9k_platform_data *pdata;
40
41 pdata = (struct ath9k_platform_data *) pdev->dev.platform_data;
42 if (off >= (ARRAY_SIZE(pdata->eeprom_data))) {
43 DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
44 "%s: flash read failed, offset %08x is out of range\n",
45 __func__, off);
46 return false;
47 }
48
49 *data = pdata->eeprom_data[off];
50 return true;
51 }
52
53 static struct ath_bus_ops ath_ahb_bus_ops = {
54 .read_cachesize = ath_ahb_read_cachesize,
55 .cleanup = ath_ahb_cleanup,
56
57 .eeprom_read = ath_ahb_eeprom_read,
58 };
59
60 static int ath_ahb_probe(struct platform_device *pdev)
61 {
62 void __iomem *mem;
63 struct ath_wiphy *aphy;
64 struct ath_softc *sc;
65 struct ieee80211_hw *hw;
66 struct resource *res;
67 int irq;
68 int ret = 0;
69 struct ath_hw *ah;
70
71 if (!pdev->dev.platform_data) {
72 dev_err(&pdev->dev, "no platform data specified\n");
73 ret = -EINVAL;
74 goto err_out;
75 }
76
77 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
78 if (res == NULL) {
79 dev_err(&pdev->dev, "no memory resource found\n");
80 ret = -ENXIO;
81 goto err_out;
82 }
83
84 mem = ioremap_nocache(res->start, res->end - res->start + 1);
85 if (mem == NULL) {
86 dev_err(&pdev->dev, "ioremap failed\n");
87 ret = -ENOMEM;
88 goto err_out;
89 }
90
91 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
92 if (res == NULL) {
93 dev_err(&pdev->dev, "no IRQ resource found\n");
94 ret = -ENXIO;
95 goto err_iounmap;
96 }
97
98 irq = res->start;
99
100 hw = ieee80211_alloc_hw(sizeof(struct ath_wiphy) +
101 sizeof(struct ath_softc), &ath9k_ops);
102 if (hw == NULL) {
103 dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
104 ret = -ENOMEM;
105 goto err_iounmap;
106 }
107
108 SET_IEEE80211_DEV(hw, &pdev->dev);
109 platform_set_drvdata(pdev, hw);
110
111 aphy = hw->priv;
112 sc = (struct ath_softc *) (aphy + 1);
113 aphy->sc = sc;
114 aphy->hw = hw;
115 sc->pri_wiphy = aphy;
116 sc->hw = hw;
117 sc->dev = &pdev->dev;
118 sc->mem = mem;
119 sc->bus_ops = &ath_ahb_bus_ops;
120 sc->irq = irq;
121
122 ret = ath_attach(AR5416_AR9100_DEVID, sc);
123 if (ret != 0) {
124 dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret);
125 ret = -ENODEV;
126 goto err_free_hw;
127 }
128
129 ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
130 if (ret) {
131 dev_err(&pdev->dev, "request_irq failed, err=%d\n", ret);
132 ret = -EIO;
133 goto err_detach;
134 }
135
136 ah = sc->sc_ah;
137 printk(KERN_INFO
138 "%s: Atheros AR%s MAC/BB Rev:%x, "
139 "AR%s RF Rev:%x, mem=0x%lx, irq=%d\n",
140 wiphy_name(hw->wiphy),
141 ath_mac_bb_name(ah->hw_version.macVersion),
142 ah->hw_version.macRev,
143 ath_rf_name((ah->hw_version.analog5GhzRev & AR_RADIO_SREV_MAJOR)),
144 ah->hw_version.phyRev,
145 (unsigned long)mem, irq);
146
147 return 0;
148
149 err_detach:
150 ath_detach(sc);
151 err_free_hw:
152 ieee80211_free_hw(hw);
153 platform_set_drvdata(pdev, NULL);
154 err_iounmap:
155 iounmap(mem);
156 err_out:
157 return ret;
158 }
159
160 static int ath_ahb_remove(struct platform_device *pdev)
161 {
162 struct ieee80211_hw *hw = platform_get_drvdata(pdev);
163
164 if (hw) {
165 struct ath_wiphy *aphy = hw->priv;
166 struct ath_softc *sc = aphy->sc;
167
168 ath_cleanup(sc);
169 platform_set_drvdata(pdev, NULL);
170 }
171
172 return 0;
173 }
174
175 static struct platform_driver ath_ahb_driver = {
176 .probe = ath_ahb_probe,
177 .remove = ath_ahb_remove,
178 .driver = {
179 .name = "ath9k",
180 .owner = THIS_MODULE,
181 },
182 };
183
184 int ath_ahb_init(void)
185 {
186 return platform_driver_register(&ath_ahb_driver);
187 }
188
189 void ath_ahb_exit(void)
190 {
191 platform_driver_unregister(&ath_ahb_driver);
192 }
193
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