Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...
[cascardo/linux.git] / drivers / net / wireless / ath / ath9k / ahb.c
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 };
44
45 /* return bus cachesize in 4B word units */
46 static void ath_ahb_read_cachesize(struct ath_common *common, int *csz)
47 {
48         *csz = L1_CACHE_BYTES >> 2;
49 }
50
51 static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
52 {
53         struct ath_softc *sc = (struct ath_softc *)common->priv;
54         struct platform_device *pdev = to_platform_device(sc->dev);
55         struct ath9k_platform_data *pdata;
56
57         pdata = dev_get_platdata(&pdev->dev);
58         if (off >= (ARRAY_SIZE(pdata->eeprom_data))) {
59                 ath_err(common,
60                         "%s: flash read failed, offset %08x is out of range\n",
61                         __func__, off);
62                 return false;
63         }
64
65         *data = pdata->eeprom_data[off];
66         return true;
67 }
68
69 static struct ath_bus_ops ath_ahb_bus_ops  = {
70         .ath_bus_type = ATH_AHB,
71         .read_cachesize = ath_ahb_read_cachesize,
72         .eeprom_read = ath_ahb_eeprom_read,
73 };
74
75 static int ath_ahb_probe(struct platform_device *pdev)
76 {
77         void __iomem *mem;
78         struct ath_softc *sc;
79         struct ieee80211_hw *hw;
80         struct resource *res;
81         const struct platform_device_id *id = platform_get_device_id(pdev);
82         int irq;
83         int ret = 0;
84         struct ath_hw *ah;
85         char hw_name[64];
86
87         if (!dev_get_platdata(&pdev->dev)) {
88                 dev_err(&pdev->dev, "no platform data specified\n");
89                 return -EINVAL;
90         }
91
92         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
93         if (res == NULL) {
94                 dev_err(&pdev->dev, "no memory resource found\n");
95                 return -ENXIO;
96         }
97
98         mem = devm_ioremap_nocache(&pdev->dev, res->start, resource_size(res));
99         if (mem == NULL) {
100                 dev_err(&pdev->dev, "ioremap failed\n");
101                 return -ENOMEM;
102         }
103
104         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
105         if (res == NULL) {
106                 dev_err(&pdev->dev, "no IRQ resource found\n");
107                 return -ENXIO;
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                 return -ENOMEM;
116         }
117
118         SET_IEEE80211_DEV(hw, &pdev->dev);
119         platform_set_drvdata(pdev, hw);
120
121         sc = hw->priv;
122         sc->hw = hw;
123         sc->dev = &pdev->dev;
124         sc->mem = mem;
125         sc->irq = irq;
126
127         /* Will be cleared in ath9k_start() */
128         set_bit(SC_OP_INVALID, &sc->sc_flags);
129
130         ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
131         if (ret) {
132                 dev_err(&pdev->dev, "request_irq failed\n");
133                 goto err_free_hw;
134         }
135
136         ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops);
137         if (ret) {
138                 dev_err(&pdev->dev, "failed to initialize device\n");
139                 goto err_irq;
140         }
141
142         ah = sc->sc_ah;
143         ath9k_hw_name(ah, hw_name, sizeof(hw_name));
144         wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
145                    hw_name, (unsigned long)mem, irq);
146
147         return 0;
148
149  err_irq:
150         free_irq(irq, sc);
151  err_free_hw:
152         ieee80211_free_hw(hw);
153         return ret;
154 }
155
156 static int ath_ahb_remove(struct platform_device *pdev)
157 {
158         struct ieee80211_hw *hw = platform_get_drvdata(pdev);
159
160         if (hw) {
161                 struct ath_softc *sc = hw->priv;
162
163                 ath9k_deinit_device(sc);
164                 free_irq(sc->irq, sc);
165                 ieee80211_free_hw(sc->hw);
166         }
167
168         return 0;
169 }
170
171 static struct platform_driver ath_ahb_driver = {
172         .probe      = ath_ahb_probe,
173         .remove     = ath_ahb_remove,
174         .driver         = {
175                 .name   = "ath9k",
176                 .owner  = THIS_MODULE,
177         },
178         .id_table    = ath9k_platform_id_table,
179 };
180
181 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table);
182
183 int ath_ahb_init(void)
184 {
185         return platform_driver_register(&ath_ahb_driver);
186 }
187
188 void ath_ahb_exit(void)
189 {
190         platform_driver_unregister(&ath_ahb_driver);
191 }