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/ath9k_platform.h> 22 #include <linux/module.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 }; 48 49 /* return bus cachesize in 4B word units */ 50 static void ath_ahb_read_cachesize(struct ath_common *common, int *csz) 51 { 52 *csz = L1_CACHE_BYTES >> 2; 53 } 54 55 static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data) 56 { 57 struct ath_softc *sc = (struct ath_softc *)common->priv; 58 struct platform_device *pdev = to_platform_device(sc->dev); 59 struct ath9k_platform_data *pdata; 60 61 pdata = dev_get_platdata(&pdev->dev); 62 if (off >= (ARRAY_SIZE(pdata->eeprom_data))) { 63 ath_err(common, 64 "%s: flash read failed, offset %08x is out of range\n", 65 __func__, off); 66 return false; 67 } 68 69 *data = pdata->eeprom_data[off]; 70 return true; 71 } 72 73 static struct ath_bus_ops ath_ahb_bus_ops = { 74 .ath_bus_type = ATH_AHB, 75 .read_cachesize = ath_ahb_read_cachesize, 76 .eeprom_read = ath_ahb_eeprom_read, 77 }; 78 79 static int ath_ahb_probe(struct platform_device *pdev) 80 { 81 void __iomem *mem; 82 struct ath_softc *sc; 83 struct ieee80211_hw *hw; 84 struct resource *res; 85 const struct platform_device_id *id = platform_get_device_id(pdev); 86 int irq; 87 int ret = 0; 88 struct ath_hw *ah; 89 char hw_name[64]; 90 91 if (!dev_get_platdata(&pdev->dev)) { 92 dev_err(&pdev->dev, "no platform data specified\n"); 93 return -EINVAL; 94 } 95 96 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 97 if (res == NULL) { 98 dev_err(&pdev->dev, "no memory resource found\n"); 99 return -ENXIO; 100 } 101 102 mem = devm_ioremap_nocache(&pdev->dev, res->start, resource_size(res)); 103 if (mem == NULL) { 104 dev_err(&pdev->dev, "ioremap failed\n"); 105 return -ENOMEM; 106 } 107 108 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 109 if (res == NULL) { 110 dev_err(&pdev->dev, "no IRQ resource found\n"); 111 return -ENXIO; 112 } 113 114 irq = res->start; 115 116 hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops); 117 if (hw == NULL) { 118 dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); 119 return -ENOMEM; 120 } 121 122 SET_IEEE80211_DEV(hw, &pdev->dev); 123 platform_set_drvdata(pdev, hw); 124 125 sc = hw->priv; 126 sc->hw = hw; 127 sc->dev = &pdev->dev; 128 sc->mem = mem; 129 sc->irq = irq; 130 131 ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc); 132 if (ret) { 133 dev_err(&pdev->dev, "request_irq failed\n"); 134 goto err_free_hw; 135 } 136 137 ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops); 138 if (ret) { 139 dev_err(&pdev->dev, "failed to initialize device\n"); 140 goto err_irq; 141 } 142 143 ah = sc->sc_ah; 144 ath9k_hw_name(ah, hw_name, sizeof(hw_name)); 145 wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n", 146 hw_name, (unsigned long)mem, irq); 147 148 return 0; 149 150 err_irq: 151 free_irq(irq, sc); 152 err_free_hw: 153 ieee80211_free_hw(hw); 154 return ret; 155 } 156 157 static int ath_ahb_remove(struct platform_device *pdev) 158 { 159 struct ieee80211_hw *hw = platform_get_drvdata(pdev); 160 161 if (hw) { 162 struct ath_softc *sc = hw->priv; 163 164 ath9k_deinit_device(sc); 165 free_irq(sc->irq, sc); 166 ieee80211_free_hw(sc->hw); 167 } 168 169 return 0; 170 } 171 172 static struct platform_driver ath_ahb_driver = { 173 .probe = ath_ahb_probe, 174 .remove = ath_ahb_remove, 175 .driver = { 176 .name = "ath9k", 177 .owner = THIS_MODULE, 178 }, 179 .id_table = ath9k_platform_id_table, 180 }; 181 182 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table); 183 184 int ath_ahb_init(void) 185 { 186 return platform_driver_register(&ath_ahb_driver); 187 } 188 189 void ath_ahb_exit(void) 190 { 191 platform_driver_unregister(&ath_ahb_driver); 192 } 193