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Linux/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 "ath9k.h"
 23 
 24 static const struct platform_device_id ath9k_platform_id_table[] = {
 25         {
 26                 .name = "ath9k",
 27                 .driver_data = AR5416_AR9100_DEVID,
 28         },
 29         {
 30                 .name = "ar933x_wmac",
 31                 .driver_data = AR9300_DEVID_AR9330,
 32         },
 33         {
 34                 .name = "ar934x_wmac",
 35                 .driver_data = AR9300_DEVID_AR9340,
 36         },
 37         {
 38                 .name = "qca955x_wmac",
 39                 .driver_data = AR9300_DEVID_QCA955X,
 40         },
 41         {
 42                 .name = "qca953x_wmac",
 43                 .driver_data = AR9300_DEVID_AR953X,
 44         },
 45         {
 46                 .name = "qca956x_wmac",
 47                 .driver_data = AR9300_DEVID_QCA956X,
 48         },
 49         {},
 50 };
 51 
 52 /* return bus cachesize in 4B word units */
 53 static void ath_ahb_read_cachesize(struct ath_common *common, int *csz)
 54 {
 55         *csz = L1_CACHE_BYTES >> 2;
 56 }
 57 
 58 static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
 59 {
 60         ath_err(common, "%s: eeprom data has to be provided externally\n",
 61                 __func__);
 62         return false;
 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 
 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 (!dev_get_platdata(&pdev->dev)) {
 84                 dev_err(&pdev->dev, "no platform data specified\n");
 85                 return -EINVAL;
 86         }
 87 
 88         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 89         if (res == NULL) {
 90                 dev_err(&pdev->dev, "no memory resource found\n");
 91                 return -ENXIO;
 92         }
 93 
 94         mem = devm_ioremap_nocache(&pdev->dev, res->start, resource_size(res));
 95         if (mem == NULL) {
 96                 dev_err(&pdev->dev, "ioremap failed\n");
 97                 return -ENOMEM;
 98         }
 99 
100         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
101         if (res == NULL) {
102                 dev_err(&pdev->dev, "no IRQ resource found\n");
103                 return -ENXIO;
104         }
105 
106         irq = res->start;
107 
108         ath9k_fill_chanctx_ops();
109         hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
110         if (hw == NULL) {
111                 dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
112                 return -ENOMEM;
113         }
114 
115         SET_IEEE80211_DEV(hw, &pdev->dev);
116         platform_set_drvdata(pdev, hw);
117 
118         sc = hw->priv;
119         sc->hw = hw;
120         sc->dev = &pdev->dev;
121         sc->mem = mem;
122         sc->irq = irq;
123 
124         ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
125         if (ret) {
126                 dev_err(&pdev->dev, "request_irq failed\n");
127                 goto err_free_hw;
128         }
129 
130         ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops);
131         if (ret) {
132                 dev_err(&pdev->dev, "failed to initialize device\n");
133                 goto err_irq;
134         }
135 
136         ah = sc->sc_ah;
137         ath9k_hw_name(ah, hw_name, sizeof(hw_name));
138         wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
139                    hw_name, (unsigned long)mem, irq);
140 
141         return 0;
142 
143  err_irq:
144         free_irq(irq, sc);
145  err_free_hw:
146         ieee80211_free_hw(hw);
147         return ret;
148 }
149 
150 static int ath_ahb_remove(struct platform_device *pdev)
151 {
152         struct ieee80211_hw *hw = platform_get_drvdata(pdev);
153 
154         if (hw) {
155                 struct ath_softc *sc = hw->priv;
156 
157                 ath9k_deinit_device(sc);
158                 free_irq(sc->irq, sc);
159                 ieee80211_free_hw(sc->hw);
160         }
161 
162         return 0;
163 }
164 
165 static struct platform_driver ath_ahb_driver = {
166         .probe      = ath_ahb_probe,
167         .remove     = ath_ahb_remove,
168         .driver         = {
169                 .name   = "ath9k",
170         },
171         .id_table    = ath9k_platform_id_table,
172 };
173 
174 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table);
175 
176 int ath_ahb_init(void)
177 {
178         return platform_driver_register(&ath_ahb_driver);
179 }
180 
181 void ath_ahb_exit(void)
182 {
183         platform_driver_unregister(&ath_ahb_driver);
184 }
185 

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