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 .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 struct ath_softc *sc = (struct ath_softc *)common->priv; 62 struct platform_device *pdev = to_platform_device(sc->dev); 63 struct ath9k_platform_data *pdata; 64 65 pdata = dev_get_platdata(&pdev->dev); 66 if (off >= (ARRAY_SIZE(pdata->eeprom_data))) { 67 ath_err(common, 68 "%s: flash read failed, offset %08x is out of range\n", 69 __func__, off); 70 return false; 71 } 72 73 *data = pdata->eeprom_data[off]; 74 return true; 75 } 76 77 static struct ath_bus_ops ath_ahb_bus_ops = { 78 .ath_bus_type = ATH_AHB, 79 .read_cachesize = ath_ahb_read_cachesize, 80 .eeprom_read = ath_ahb_eeprom_read, 81 }; 82 83 static int ath_ahb_probe(struct platform_device *pdev) 84 { 85 void __iomem *mem; 86 struct ath_softc *sc; 87 struct ieee80211_hw *hw; 88 struct resource *res; 89 const struct platform_device_id *id = platform_get_device_id(pdev); 90 int irq; 91 int ret = 0; 92 struct ath_hw *ah; 93 char hw_name[64]; 94 95 if (!dev_get_platdata(&pdev->dev)) { 96 dev_err(&pdev->dev, "no platform data specified\n"); 97 return -EINVAL; 98 } 99 100 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 101 if (res == NULL) { 102 dev_err(&pdev->dev, "no memory resource found\n"); 103 return -ENXIO; 104 } 105 106 mem = devm_ioremap_nocache(&pdev->dev, res->start, resource_size(res)); 107 if (mem == NULL) { 108 dev_err(&pdev->dev, "ioremap failed\n"); 109 return -ENOMEM; 110 } 111 112 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 113 if (res == NULL) { 114 dev_err(&pdev->dev, "no IRQ resource found\n"); 115 return -ENXIO; 116 } 117 118 irq = res->start; 119 120 ath9k_fill_chanctx_ops(); 121 hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops); 122 if (hw == NULL) { 123 dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); 124 return -ENOMEM; 125 } 126 127 SET_IEEE80211_DEV(hw, &pdev->dev); 128 platform_set_drvdata(pdev, hw); 129 130 sc = hw->priv; 131 sc->hw = hw; 132 sc->dev = &pdev->dev; 133 sc->mem = mem; 134 sc->irq = irq; 135 136 ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc); 137 if (ret) { 138 dev_err(&pdev->dev, "request_irq failed\n"); 139 goto err_free_hw; 140 } 141 142 ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops); 143 if (ret) { 144 dev_err(&pdev->dev, "failed to initialize device\n"); 145 goto err_irq; 146 } 147 148 ah = sc->sc_ah; 149 ath9k_hw_name(ah, hw_name, sizeof(hw_name)); 150 wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n", 151 hw_name, (unsigned long)mem, irq); 152 153 return 0; 154 155 err_irq: 156 free_irq(irq, sc); 157 err_free_hw: 158 ieee80211_free_hw(hw); 159 return ret; 160 } 161 162 static int ath_ahb_remove(struct platform_device *pdev) 163 { 164 struct ieee80211_hw *hw = platform_get_drvdata(pdev); 165 166 if (hw) { 167 struct ath_softc *sc = hw->priv; 168 169 ath9k_deinit_device(sc); 170 free_irq(sc->irq, sc); 171 ieee80211_free_hw(sc->hw); 172 } 173 174 return 0; 175 } 176 177 static struct platform_driver ath_ahb_driver = { 178 .probe = ath_ahb_probe, 179 .remove = ath_ahb_remove, 180 .driver = { 181 .name = "ath9k", 182 }, 183 .id_table = ath9k_platform_id_table, 184 }; 185 186 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table); 187 188 int ath_ahb_init(void) 189 { 190 return platform_driver_register(&ath_ahb_driver); 191 } 192 193 void ath_ahb_exit(void) 194 { 195 platform_driver_unregister(&ath_ahb_driver); 196 } 197