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 }; 40 41 /* return bus cachesize in 4B word units */ 42 static void ath_ahb_read_cachesize(struct ath_common *common, int *csz) 43 { 44 *csz = L1_CACHE_BYTES >> 2; 45 } 46 47 static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data) 48 { 49 struct ath_softc *sc = (struct ath_softc *)common->priv; 50 struct platform_device *pdev = to_platform_device(sc->dev); 51 struct ath9k_platform_data *pdata; 52 53 pdata = (struct ath9k_platform_data *) pdev->dev.platform_data; 54 if (off >= (ARRAY_SIZE(pdata->eeprom_data))) { 55 ath_err(common, 56 "%s: flash read failed, offset %08x is out of range\n", 57 __func__, off); 58 return false; 59 } 60 61 *data = pdata->eeprom_data[off]; 62 return true; 63 } 64 65 static struct ath_bus_ops ath_ahb_bus_ops = { 66 .ath_bus_type = ATH_AHB, 67 .read_cachesize = ath_ahb_read_cachesize, 68 .eeprom_read = ath_ahb_eeprom_read, 69 }; 70 71 static int ath_ahb_probe(struct platform_device *pdev) 72 { 73 void __iomem *mem; 74 struct ath_softc *sc; 75 struct ieee80211_hw *hw; 76 struct resource *res; 77 const struct platform_device_id *id = platform_get_device_id(pdev); 78 int irq; 79 int ret = 0; 80 struct ath_hw *ah; 81 char hw_name[64]; 82 83 if (!pdev->dev.platform_data) { 84 dev_err(&pdev->dev, "no platform data specified\n"); 85 ret = -EINVAL; 86 goto err_out; 87 } 88 89 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 90 if (res == NULL) { 91 dev_err(&pdev->dev, "no memory resource found\n"); 92 ret = -ENXIO; 93 goto err_out; 94 } 95 96 mem = ioremap_nocache(res->start, resource_size(res)); 97 if (mem == NULL) { 98 dev_err(&pdev->dev, "ioremap failed\n"); 99 ret = -ENOMEM; 100 goto err_out; 101 } 102 103 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 104 if (res == NULL) { 105 dev_err(&pdev->dev, "no IRQ resource found\n"); 106 ret = -ENXIO; 107 goto err_iounmap; 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 ret = -ENOMEM; 116 goto err_iounmap; 117 } 118 119 SET_IEEE80211_DEV(hw, &pdev->dev); 120 platform_set_drvdata(pdev, hw); 121 122 sc = hw->priv; 123 sc->hw = hw; 124 sc->dev = &pdev->dev; 125 sc->mem = mem; 126 sc->irq = irq; 127 128 /* Will be cleared in ath9k_start() */ 129 sc->sc_flags |= SC_OP_INVALID; 130 131 ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc); 132 if (ret) { 133 dev_err(&pdev->dev, "request_irq failed\n"); 134 goto err_free_hw; 135 } 136 137 ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops); 138 if (ret) { 139 dev_err(&pdev->dev, "failed to initialize device\n"); 140 goto err_irq; 141 } 142 143 ah = sc->sc_ah; 144 ath9k_hw_name(ah, hw_name, sizeof(hw_name)); 145 wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n", 146 hw_name, (unsigned long)mem, irq); 147 148 return 0; 149 150 err_irq: 151 free_irq(irq, sc); 152 err_free_hw: 153 ieee80211_free_hw(hw); 154 platform_set_drvdata(pdev, NULL); 155 err_iounmap: 156 iounmap(mem); 157 err_out: 158 return ret; 159 } 160 161 static int ath_ahb_remove(struct platform_device *pdev) 162 { 163 struct ieee80211_hw *hw = platform_get_drvdata(pdev); 164 165 if (hw) { 166 struct ath_softc *sc = hw->priv; 167 void __iomem *mem = sc->mem; 168 169 ath9k_deinit_device(sc); 170 free_irq(sc->irq, sc); 171 ieee80211_free_hw(sc->hw); 172 iounmap(mem); 173 platform_set_drvdata(pdev, NULL); 174 } 175 176 return 0; 177 } 178 179 static struct platform_driver ath_ahb_driver = { 180 .probe = ath_ahb_probe, 181 .remove = ath_ahb_remove, 182 .driver = { 183 .name = "ath9k", 184 .owner = THIS_MODULE, 185 }, 186 .id_table = ath9k_platform_id_table, 187 }; 188 189 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table); 190 191 int ath_ahb_init(void) 192 { 193 return platform_driver_register(&ath_ahb_driver); 194 } 195 196 void ath_ahb_exit(void) 197 { 198 platform_driver_unregister(&ath_ahb_driver); 199 } 200