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_nocache(&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 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 102 if (res == NULL) { 103 dev_err(&pdev->dev, "no IRQ resource found\n"); 104 return -ENXIO; 105 } 106 107 irq = res->start; 108 109 ath9k_fill_chanctx_ops(); 110 hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops); 111 if (hw == NULL) { 112 dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); 113 return -ENOMEM; 114 } 115 116 SET_IEEE80211_DEV(hw, &pdev->dev); 117 platform_set_drvdata(pdev, hw); 118 119 sc = hw->priv; 120 sc->hw = hw; 121 sc->dev = &pdev->dev; 122 sc->mem = mem; 123 sc->irq = irq; 124 125 ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc); 126 if (ret) { 127 dev_err(&pdev->dev, "request_irq failed\n"); 128 goto err_free_hw; 129 } 130 131 ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops); 132 if (ret) { 133 dev_err(&pdev->dev, "failed to initialize device\n"); 134 goto err_irq; 135 } 136 137 ah = sc->sc_ah; 138 ath9k_hw_name(ah, hw_name, sizeof(hw_name)); 139 wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n", 140 hw_name, (unsigned long)mem, irq); 141 142 return 0; 143 144 err_irq: 145 free_irq(irq, sc); 146 err_free_hw: 147 ieee80211_free_hw(hw); 148 return ret; 149 } 150 151 static int ath_ahb_remove(struct platform_device *pdev) 152 { 153 struct ieee80211_hw *hw = platform_get_drvdata(pdev); 154 155 if (hw) { 156 struct ath_softc *sc = hw->priv; 157 158 ath9k_deinit_device(sc); 159 free_irq(sc->irq, sc); 160 ieee80211_free_hw(sc->hw); 161 } 162 163 return 0; 164 } 165 166 static struct platform_driver ath_ahb_driver = { 167 .probe = ath_ahb_probe, 168 .remove = ath_ahb_remove, 169 .driver = { 170 .name = "ath9k", 171 }, 172 .id_table = ath9k_platform_id_table, 173 }; 174 175 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table); 176 177 int ath_ahb_init(void) 178 { 179 return platform_driver_register(&ath_ahb_driver); 180 } 181 182 void ath_ahb_exit(void) 183 { 184 platform_driver_unregister(&ath_ahb_driver); 185 } 186