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
25static 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 */
54static void ath_ahb_read_cachesize(struct ath_common *common, int *csz)
55{
56 *csz = L1_CACHE_BYTES >> 2;
57}
58
59static 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
66static 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
72static 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(dev: &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(dev: &pdev->dev, offset: res->start, size: 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(priv_data_len: sizeof(struct ath_softc), ops: &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, dev: &pdev->dev);
113 platform_set_drvdata(pdev, data: 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, handler: ath_isr, IRQF_SHARED, name: "ath9k", dev: 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(devid: id->driver_data, sc, bus_ops: &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, len: sizeof(hw_name));
135 wiphy_info(hw->wiphy, "%s mem=0x%p, irq=%d\n",
136 hw_name, 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
147static void 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(hw: sc->hw);
157 }
158}
159
160static struct platform_driver ath_ahb_driver = {
161 .probe = ath_ahb_probe,
162 .remove_new = ath_ahb_remove,
163 .driver = {
164 .name = "ath9k",
165 },
166 .id_table = ath9k_platform_id_table,
167};
168
169MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table);
170
171int ath_ahb_init(void)
172{
173 return platform_driver_register(&ath_ahb_driver);
174}
175
176void ath_ahb_exit(void)
177{
178 platform_driver_unregister(&ath_ahb_driver);
179}
180

source code of linux/drivers/net/wireless/ath/ath9k/ahb.c