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 "ath9k.h" 23 24 static const struct platform_device_id ath9k_platform_id_table[] = { 25 { 26 .name = "ath9k", 27 .driver_data = AR5416_AR9100_DEVID, 28 }, 29 { 30 .name = "ar933x_wmac", 31 .driver_data = AR9300_DEVID_AR9330, 32 }, 33 { 34 .name = "ar934x_wmac", 35 .driver_data = AR9300_DEVID_AR9340, 36 }, 37 {}, 38 }; 39 40 /* return bus cachesize in 4B word units */ 41 static void ath_ahb_read_cachesize(struct ath_common *common, int *csz) 42 { 43 *csz = L1_CACHE_BYTES >> 2; 44 } 45 46 static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data) 47 { 48 struct ath_softc *sc = (struct ath_softc *)common->priv; 49 struct platform_device *pdev = to_platform_device(sc->dev); 50 struct ath9k_platform_data *pdata; 51 52 pdata = (struct ath9k_platform_data *) pdev->dev.platform_data; 53 if (off >= (ARRAY_SIZE(pdata->eeprom_data))) { 54 ath_err(common, 55 "%s: flash read failed, offset %08x is out of range\n", 56 __func__, off); 57 return false; 58 } 59 60 *data = pdata->eeprom_data[off]; 61 return true; 62 } 63 64 static struct ath_bus_ops ath_ahb_bus_ops = { 65 .ath_bus_type = ATH_AHB, 66 .read_cachesize = ath_ahb_read_cachesize, 67 .eeprom_read = ath_ahb_eeprom_read, 68 }; 69 70 static int ath_ahb_probe(struct platform_device *pdev) 71 { 72 void __iomem *mem; 73 struct ath_softc *sc; 74 struct ieee80211_hw *hw; 75 struct resource *res; 76 const struct platform_device_id *id = platform_get_device_id(pdev); 77 int irq; 78 int ret = 0; 79 struct ath_hw *ah; 80 char hw_name[64]; 81 82 if (!pdev->dev.platform_data) { 83 dev_err(&pdev->dev, "no platform data specified\n"); 84 ret = -EINVAL; 85 goto err_out; 86 } 87 88 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 89 if (res == NULL) { 90 dev_err(&pdev->dev, "no memory resource found\n"); 91 ret = -ENXIO; 92 goto err_out; 93 } 94 95 mem = ioremap_nocache(res->start, resource_size(res)); 96 if (mem == NULL) { 97 dev_err(&pdev->dev, "ioremap failed\n"); 98 ret = -ENOMEM; 99 goto err_out; 100 } 101 102 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 103 if (res == NULL) { 104 dev_err(&pdev->dev, "no IRQ resource found\n"); 105 ret = -ENXIO; 106 goto err_iounmap; 107 } 108 109 irq = res->start; 110 111 hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops); 112 if (hw == NULL) { 113 dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); 114 ret = -ENOMEM; 115 goto err_iounmap; 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 sc->sc_flags |= SC_OP_INVALID; 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, 0x0, &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 platform_set_drvdata(pdev, NULL); 154 err_iounmap: 155 iounmap(mem); 156 err_out: 157 return ret; 158 } 159 160 static int ath_ahb_remove(struct platform_device *pdev) 161 { 162 struct ieee80211_hw *hw = platform_get_drvdata(pdev); 163 164 if (hw) { 165 struct ath_softc *sc = hw->priv; 166 void __iomem *mem = sc->mem; 167 168 ath9k_deinit_device(sc); 169 free_irq(sc->irq, sc); 170 ieee80211_free_hw(sc->hw); 171 iounmap(mem); 172 platform_set_drvdata(pdev, NULL); 173 } 174 175 return 0; 176 } 177 178 static struct platform_driver ath_ahb_driver = { 179 .probe = ath_ahb_probe, 180 .remove = ath_ahb_remove, 181 .driver = { 182 .name = "ath9k", 183 .owner = THIS_MODULE, 184 }, 185 .id_table = ath9k_platform_id_table, 186 }; 187 188 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table); 189 190 int ath_ahb_init(void) 191 { 192 return platform_driver_register(&ath_ahb_driver); 193 } 194 195 void ath_ahb_exit(void) 196 { 197 platform_driver_unregister(&ath_ahb_driver); 198 } 199