1 /* 2 * Copyright (c) 2008-2009 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 "ath9k.h" 23 24 /* return bus cachesize in 4B word units */ 25 static void ath_ahb_read_cachesize(struct ath_common *common, int *csz) 26 { 27 *csz = L1_CACHE_BYTES >> 2; 28 } 29 30 static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data) 31 { 32 struct ath_softc *sc = (struct ath_softc *)common->priv; 33 struct platform_device *pdev = to_platform_device(sc->dev); 34 struct ath9k_platform_data *pdata; 35 36 pdata = (struct ath9k_platform_data *) pdev->dev.platform_data; 37 if (off >= (ARRAY_SIZE(pdata->eeprom_data))) { 38 ath_err(common, 39 "%s: flash read failed, offset %08x is out of range\n", 40 __func__, off); 41 return false; 42 } 43 44 *data = pdata->eeprom_data[off]; 45 return true; 46 } 47 48 static struct ath_bus_ops ath_ahb_bus_ops = { 49 .ath_bus_type = ATH_AHB, 50 .read_cachesize = ath_ahb_read_cachesize, 51 .eeprom_read = ath_ahb_eeprom_read, 52 }; 53 54 static int ath_ahb_probe(struct platform_device *pdev) 55 { 56 void __iomem *mem; 57 struct ath_wiphy *aphy; 58 struct ath_softc *sc; 59 struct ieee80211_hw *hw; 60 struct resource *res; 61 int irq; 62 int ret = 0; 63 struct ath_hw *ah; 64 char hw_name[64]; 65 66 if (!pdev->dev.platform_data) { 67 dev_err(&pdev->dev, "no platform data specified\n"); 68 ret = -EINVAL; 69 goto err_out; 70 } 71 72 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 73 if (res == NULL) { 74 dev_err(&pdev->dev, "no memory resource found\n"); 75 ret = -ENXIO; 76 goto err_out; 77 } 78 79 mem = ioremap_nocache(res->start, res->end - res->start + 1); 80 if (mem == NULL) { 81 dev_err(&pdev->dev, "ioremap failed\n"); 82 ret = -ENOMEM; 83 goto err_out; 84 } 85 86 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 87 if (res == NULL) { 88 dev_err(&pdev->dev, "no IRQ resource found\n"); 89 ret = -ENXIO; 90 goto err_iounmap; 91 } 92 93 irq = res->start; 94 95 hw = ieee80211_alloc_hw(sizeof(struct ath_wiphy) + 96 sizeof(struct ath_softc), &ath9k_ops); 97 if (hw == NULL) { 98 dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); 99 ret = -ENOMEM; 100 goto err_iounmap; 101 } 102 103 SET_IEEE80211_DEV(hw, &pdev->dev); 104 platform_set_drvdata(pdev, hw); 105 106 aphy = hw->priv; 107 sc = (struct ath_softc *) (aphy + 1); 108 aphy->sc = sc; 109 aphy->hw = hw; 110 sc->pri_wiphy = aphy; 111 sc->hw = hw; 112 sc->dev = &pdev->dev; 113 sc->mem = mem; 114 sc->irq = irq; 115 116 /* Will be cleared in ath9k_start() */ 117 sc->sc_flags |= SC_OP_INVALID; 118 119 ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc); 120 if (ret) { 121 dev_err(&pdev->dev, "request_irq failed\n"); 122 goto err_free_hw; 123 } 124 125 ret = ath9k_init_device(AR5416_AR9100_DEVID, sc, 0x0, &ath_ahb_bus_ops); 126 if (ret) { 127 dev_err(&pdev->dev, "failed to initialize device\n"); 128 goto err_irq; 129 } 130 131 ah = sc->sc_ah; 132 ath9k_hw_name(ah, hw_name, sizeof(hw_name)); 133 wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n", 134 hw_name, (unsigned long)mem, irq); 135 136 return 0; 137 138 err_irq: 139 free_irq(irq, sc); 140 err_free_hw: 141 ieee80211_free_hw(hw); 142 platform_set_drvdata(pdev, NULL); 143 err_iounmap: 144 iounmap(mem); 145 err_out: 146 return ret; 147 } 148 149 static int ath_ahb_remove(struct platform_device *pdev) 150 { 151 struct ieee80211_hw *hw = platform_get_drvdata(pdev); 152 153 if (hw) { 154 struct ath_wiphy *aphy = hw->priv; 155 struct ath_softc *sc = aphy->sc; 156 void __iomem *mem = sc->mem; 157 158 ath9k_deinit_device(sc); 159 free_irq(sc->irq, sc); 160 ieee80211_free_hw(sc->hw); 161 iounmap(mem); 162 platform_set_drvdata(pdev, NULL); 163 } 164 165 return 0; 166 } 167 168 static struct platform_driver ath_ahb_driver = { 169 .probe = ath_ahb_probe, 170 .remove = ath_ahb_remove, 171 .driver = { 172 .name = "ath9k", 173 .owner = THIS_MODULE, 174 }, 175 }; 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