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 const 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