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 */ 25static void ath_ahb_read_cachesize(struct ath_common *common, int *csz) 26{ 27 *csz = L1_CACHE_BYTES >> 2; 28} 29 30static 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_print(common, ATH_DBG_FATAL, 39 "%s: flash read failed, offset %08x " 40 "is out of range\n", 41 __func__, off); 42 return false; 43 } 44 45 *data = pdata->eeprom_data[off]; 46 return true; 47} 48 49static struct ath_bus_ops ath_ahb_bus_ops = { 50 .ath_bus_type = ATH_AHB, 51 .read_cachesize = ath_ahb_read_cachesize, 52 .eeprom_read = ath_ahb_eeprom_read, 53}; 54 55static int ath_ahb_probe(struct platform_device *pdev) 56{ 57 void __iomem *mem; 58 struct ath_wiphy *aphy; 59 struct ath_softc *sc; 60 struct ieee80211_hw *hw; 61 struct resource *res; 62 int irq; 63 int ret = 0; 64 struct ath_hw *ah; 65 char hw_name[64]; 66 67 if (!pdev->dev.platform_data) { 68 dev_err(&pdev->dev, "no platform data specified\n"); 69 ret = -EINVAL; 70 goto err_out; 71 } 72 73 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 74 if (res == NULL) { 75 dev_err(&pdev->dev, "no memory resource found\n"); 76 ret = -ENXIO; 77 goto err_out; 78 } 79 80 mem = ioremap_nocache(res->start, res->end - res->start + 1); 81 if (mem == NULL) { 82 dev_err(&pdev->dev, "ioremap failed\n"); 83 ret = -ENOMEM; 84 goto err_out; 85 } 86 87 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 88 if (res == NULL) { 89 dev_err(&pdev->dev, "no IRQ resource found\n"); 90 ret = -ENXIO; 91 goto err_iounmap; 92 } 93 94 irq = res->start; 95 96 hw = ieee80211_alloc_hw(sizeof(struct ath_wiphy) + 97 sizeof(struct ath_softc), &ath9k_ops); 98 if (hw == NULL) { 99 dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); 100 ret = -ENOMEM; 101 goto err_iounmap; 102 } 103 104 SET_IEEE80211_DEV(hw, &pdev->dev); 105 platform_set_drvdata(pdev, hw); 106 107 aphy = hw->priv; 108 sc = (struct ath_softc *) (aphy + 1); 109 aphy->sc = sc; 110 aphy->hw = hw; 111 sc->pri_wiphy = aphy; 112 sc->hw = hw; 113 sc->dev = &pdev->dev; 114 sc->mem = mem; 115 sc->irq = irq; 116 117 /* Will be cleared in ath9k_start() */ 118 sc->sc_flags |= SC_OP_INVALID; 119 120 ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc); 121 if (ret) { 122 dev_err(&pdev->dev, "request_irq failed\n"); 123 goto err_free_hw; 124 } 125 126 ret = ath9k_init_device(AR5416_AR9100_DEVID, sc, 0x0, &ath_ahb_bus_ops); 127 if (ret) { 128 dev_err(&pdev->dev, "failed to initialize device\n"); 129 goto err_irq; 130 } 131 132 ah = sc->sc_ah; 133 ath9k_hw_name(ah, hw_name, sizeof(hw_name)); 134 wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n", 135 hw_name, (unsigned long)mem, irq); 136 137 return 0; 138 139 err_irq: 140 free_irq(irq, sc); 141 err_free_hw: 142 ieee80211_free_hw(hw); 143 platform_set_drvdata(pdev, NULL); 144 err_iounmap: 145 iounmap(mem); 146 err_out: 147 return ret; 148} 149 150static int ath_ahb_remove(struct platform_device *pdev) 151{ 152 struct ieee80211_hw *hw = platform_get_drvdata(pdev); 153 154 if (hw) { 155 struct ath_wiphy *aphy = hw->priv; 156 struct ath_softc *sc = aphy->sc; 157 void __iomem *mem = sc->mem; 158 159 ath9k_deinit_device(sc); 160 free_irq(sc->irq, sc); 161 ieee80211_free_hw(sc->hw); 162 iounmap(mem); 163 platform_set_drvdata(pdev, NULL); 164 } 165 166 return 0; 167} 168 169static struct platform_driver ath_ahb_driver = { 170 .probe = ath_ahb_probe, 171 .remove = ath_ahb_remove, 172 .driver = { 173 .name = "ath9k", 174 .owner = THIS_MODULE, 175 }, 176}; 177 178int ath_ahb_init(void) 179{ 180 return platform_driver_register(&ath_ahb_driver); 181} 182 183void ath_ahb_exit(void) 184{ 185 platform_driver_unregister(&ath_ahb_driver); 186} 187