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_softc *sc; 58 struct ieee80211_hw *hw; 59 struct resource *res; 60 int irq; 61 int ret = 0; 62 struct ath_hw *ah; 63 char hw_name[64]; 64 65 if (!pdev->dev.platform_data) { 66 dev_err(&pdev->dev, "no platform data specified\n"); 67 ret = -EINVAL; 68 goto err_out; 69 } 70 71 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 72 if (res == NULL) { 73 dev_err(&pdev->dev, "no memory resource found\n"); 74 ret = -ENXIO; 75 goto err_out; 76 } 77 78 mem = ioremap_nocache(res->start, resource_size(res)); 79 if (mem == NULL) { 80 dev_err(&pdev->dev, "ioremap failed\n"); 81 ret = -ENOMEM; 82 goto err_out; 83 } 84 85 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 86 if (res == NULL) { 87 dev_err(&pdev->dev, "no IRQ resource found\n"); 88 ret = -ENXIO; 89 goto err_iounmap; 90 } 91 92 irq = res->start; 93 94 hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops); 95 if (hw == NULL) { 96 dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); 97 ret = -ENOMEM; 98 goto err_iounmap; 99 } 100 101 SET_IEEE80211_DEV(hw, &pdev->dev); 102 platform_set_drvdata(pdev, hw); 103 104 sc = hw->priv; 105 sc->hw = hw; 106 sc->dev = &pdev->dev; 107 sc->mem = mem; 108 sc->irq = irq; 109 110 /* Will be cleared in ath9k_start() */ 111 sc->sc_flags |= SC_OP_INVALID; 112 113 ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc); 114 if (ret) { 115 dev_err(&pdev->dev, "request_irq failed\n"); 116 goto err_free_hw; 117 } 118 119 ret = ath9k_init_device(AR5416_AR9100_DEVID, sc, 0x0, &ath_ahb_bus_ops); 120 if (ret) { 121 dev_err(&pdev->dev, "failed to initialize device\n"); 122 goto err_irq; 123 } 124 125 ah = sc->sc_ah; 126 ath9k_hw_name(ah, hw_name, sizeof(hw_name)); 127 wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n", 128 hw_name, (unsigned long)mem, irq); 129 130 return 0; 131 132 err_irq: 133 free_irq(irq, sc); 134 err_free_hw: 135 ieee80211_free_hw(hw); 136 platform_set_drvdata(pdev, NULL); 137 err_iounmap: 138 iounmap(mem); 139 err_out: 140 return ret; 141 } 142 143 static int ath_ahb_remove(struct platform_device *pdev) 144 { 145 struct ieee80211_hw *hw = platform_get_drvdata(pdev); 146 147 if (hw) { 148 struct ath_softc *sc = hw->priv; 149 void __iomem *mem = sc->mem; 150 151 ath9k_deinit_device(sc); 152 free_irq(sc->irq, sc); 153 ieee80211_free_hw(sc->hw); 154 iounmap(mem); 155 platform_set_drvdata(pdev, NULL); 156 } 157 158 return 0; 159 } 160 161 static struct platform_driver ath_ahb_driver = { 162 .probe = ath_ahb_probe, 163 .remove = ath_ahb_remove, 164 .driver = { 165 .name = "ath9k", 166 .owner = THIS_MODULE, 167 }, 168 }; 169 170 int ath_ahb_init(void) 171 { 172 return platform_driver_register(&ath_ahb_driver); 173 } 174 175 void ath_ahb_exit(void) 176 { 177 platform_driver_unregister(&ath_ahb_driver); 178 } 179