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 }; 44 45 /* return bus cachesize in 4B word units */ 46 static void ath_ahb_read_cachesize(struct ath_common *common, int *csz) 47 { 48 *csz = L1_CACHE_BYTES >> 2; 49 } 50 51 static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data) 52 { 53 struct ath_softc *sc = (struct ath_softc *)common->priv; 54 struct platform_device *pdev = to_platform_device(sc->dev); 55 struct ath9k_platform_data *pdata; 56 57 pdata = dev_get_platdata(&pdev->dev); 58 if (off >= (ARRAY_SIZE(pdata->eeprom_data))) { 59 ath_err(common, 60 "%s: flash read failed, offset %08x is out of range\n", 61 __func__, off); 62 return false; 63 } 64 65 *data = pdata->eeprom_data[off]; 66 return true; 67 } 68 69 static struct ath_bus_ops ath_ahb_bus_ops = { 70 .ath_bus_type = ATH_AHB, 71 .read_cachesize = ath_ahb_read_cachesize, 72 .eeprom_read = ath_ahb_eeprom_read, 73 }; 74 75 static int ath_ahb_probe(struct platform_device *pdev) 76 { 77 void __iomem *mem; 78 struct ath_softc *sc; 79 struct ieee80211_hw *hw; 80 struct resource *res; 81 const struct platform_device_id *id = platform_get_device_id(pdev); 82 int irq; 83 int ret = 0; 84 struct ath_hw *ah; 85 char hw_name[64]; 86 87 if (!dev_get_platdata(&pdev->dev)) { 88 dev_err(&pdev->dev, "no platform data specified\n"); 89 return -EINVAL; 90 } 91 92 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 93 if (res == NULL) { 94 dev_err(&pdev->dev, "no memory resource found\n"); 95 return -ENXIO; 96 } 97 98 mem = devm_ioremap_nocache(&pdev->dev, res->start, resource_size(res)); 99 if (mem == NULL) { 100 dev_err(&pdev->dev, "ioremap failed\n"); 101 return -ENOMEM; 102 } 103 104 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 105 if (res == NULL) { 106 dev_err(&pdev->dev, "no IRQ resource found\n"); 107 return -ENXIO; 108 } 109 110 irq = res->start; 111 112 hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops); 113 if (hw == NULL) { 114 dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); 115 return -ENOMEM; 116 } 117 118 SET_IEEE80211_DEV(hw, &pdev->dev); 119 platform_set_drvdata(pdev, hw); 120 121 sc = hw->priv; 122 sc->hw = hw; 123 sc->dev = &pdev->dev; 124 sc->mem = mem; 125 sc->irq = irq; 126 127 /* Will be cleared in ath9k_start() */ 128 set_bit(SC_OP_INVALID, &sc->sc_flags); 129 130 ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc); 131 if (ret) { 132 dev_err(&pdev->dev, "request_irq failed\n"); 133 goto err_free_hw; 134 } 135 136 ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops); 137 if (ret) { 138 dev_err(&pdev->dev, "failed to initialize device\n"); 139 goto err_irq; 140 } 141 142 ah = sc->sc_ah; 143 ath9k_hw_name(ah, hw_name, sizeof(hw_name)); 144 wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n", 145 hw_name, (unsigned long)mem, irq); 146 147 return 0; 148 149 err_irq: 150 free_irq(irq, sc); 151 err_free_hw: 152 ieee80211_free_hw(hw); 153 return ret; 154 } 155 156 static int ath_ahb_remove(struct platform_device *pdev) 157 { 158 struct ieee80211_hw *hw = platform_get_drvdata(pdev); 159 160 if (hw) { 161 struct ath_softc *sc = hw->priv; 162 163 ath9k_deinit_device(sc); 164 free_irq(sc->irq, sc); 165 ieee80211_free_hw(sc->hw); 166 } 167 168 return 0; 169 } 170 171 static struct platform_driver ath_ahb_driver = { 172 .probe = ath_ahb_probe, 173 .remove = ath_ahb_remove, 174 .driver = { 175 .name = "ath9k", 176 .owner = THIS_MODULE, 177 }, 178 .id_table = ath9k_platform_id_table, 179 }; 180 181 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table); 182 183 int ath_ahb_init(void) 184 { 185 return platform_driver_register(&ath_ahb_driver); 186 } 187 188 void ath_ahb_exit(void) 189 { 190 platform_driver_unregister(&ath_ahb_driver); 191 } 192