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 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 mem = devm_platform_ioremap_resource(pdev, 0); 89 if (IS_ERR(mem)) { 90 dev_err(&pdev->dev, "ioremap failed\n"); 91 return PTR_ERR(mem); 92 } 93 94 irq = platform_get_irq(pdev, 0); 95 if (irq < 0) 96 return irq; 97 98 ath9k_fill_chanctx_ops(); 99 hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops); 100 if (hw == NULL) { 101 dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); 102 return -ENOMEM; 103 } 104 105 SET_IEEE80211_DEV(hw, &pdev->dev); 106 platform_set_drvdata(pdev, hw); 107 108 sc = hw->priv; 109 sc->hw = hw; 110 sc->dev = &pdev->dev; 111 sc->mem = mem; 112 sc->irq = irq; 113 114 ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc); 115 if (ret) { 116 dev_err(&pdev->dev, "request_irq failed\n"); 117 goto err_free_hw; 118 } 119 120 ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops); 121 if (ret) { 122 dev_err(&pdev->dev, "failed to initialize device\n"); 123 goto err_irq; 124 } 125 126 ah = sc->sc_ah; 127 ath9k_hw_name(ah, hw_name, sizeof(hw_name)); 128 wiphy_info(hw->wiphy, "%s mem=0x%p, irq=%d\n", 129 hw_name, mem, irq); 130 131 return 0; 132 133 err_irq: 134 free_irq(irq, sc); 135 err_free_hw: 136 ieee80211_free_hw(hw); 137 return ret; 138 } 139 140 static void ath_ahb_remove(struct platform_device *pdev) 141 { 142 struct ieee80211_hw *hw = platform_get_drvdata(pdev); 143 144 if (hw) { 145 struct ath_softc *sc = hw->priv; 146 147 ath9k_deinit_device(sc); 148 free_irq(sc->irq, sc); 149 ieee80211_free_hw(sc->hw); 150 } 151 } 152 153 static struct platform_driver ath_ahb_driver = { 154 .probe = ath_ahb_probe, 155 .remove = ath_ahb_remove, 156 .driver = { 157 .name = "ath9k", 158 }, 159 .id_table = ath9k_platform_id_table, 160 }; 161 162 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table); 163 164 int ath_ahb_init(void) 165 { 166 return platform_driver_register(&ath_ahb_driver); 167 } 168 169 void ath_ahb_exit(void) 170 { 171 platform_driver_unregister(&ath_ahb_driver); 172 } 173