Linux 6.10-rc3
[sfrench/cifs-2.6.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/module.h>
22 #include <linux/mod_devicetable.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                 .name = "qca956x_wmac",
48                 .driver_data = AR9300_DEVID_QCA956X,
49         },
50         {},
51 };
52
53 /* return bus cachesize in 4B word units */
54 static void ath_ahb_read_cachesize(struct ath_common *common, int *csz)
55 {
56         *csz = L1_CACHE_BYTES >> 2;
57 }
58
59 static 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
66 static 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
72 static 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(&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(&pdev->dev, res->start, 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(sizeof(struct ath_softc), &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, &pdev->dev);
113         platform_set_drvdata(pdev, 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, ath_isr, IRQF_SHARED, "ath9k", 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(id->driver_data, sc, &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, 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
147 static 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(sc->hw);
157         }
158 }
159
160 static 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
169 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table);
170
171 int ath_ahb_init(void)
172 {
173         return platform_driver_register(&ath_ahb_driver);
174 }
175
176 void ath_ahb_exit(void)
177 {
178         platform_driver_unregister(&ath_ahb_driver);
179 }