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 .name = "qca955x_wmac", 40 .driver_data = AR9300_DEVID_QCA955X, 41 }, 42 {}, 43 }; 44 45 /* return bus cachesize in 4B word units */ 46 static void ath_ahb_read_cachesize(struct ath_common *common, int *csz) 47 { 48 *csz = L1_CACHE_BYTES >> 2; 49 } 50 51 static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data) 52 { 53 struct ath_softc *sc = (struct ath_softc *)common->priv; 54 struct platform_device *pdev = to_platform_device(sc->dev); 55 struct ath9k_platform_data *pdata; 56 57 pdata = (struct ath9k_platform_data *) pdev->dev.platform_data; 58 if (off >= (ARRAY_SIZE(pdata->eeprom_data))) { 59 ath_err(common, 60 "%s: flash read failed, offset %08x is out of range\n", 61 __func__, off); 62 return false; 63 } 64 65 *data = pdata->eeprom_data[off]; 66 return true; 67 } 68 69 static struct ath_bus_ops ath_ahb_bus_ops = { 70 .ath_bus_type = ATH_AHB, 71 .read_cachesize = ath_ahb_read_cachesize, 72 .eeprom_read = ath_ahb_eeprom_read, 73 }; 74 75 static int ath_ahb_probe(struct platform_device *pdev) 76 { 77 void __iomem *mem; 78 struct ath_softc *sc; 79 struct ieee80211_hw *hw; 80 struct resource *res; 81 const struct platform_device_id *id = platform_get_device_id(pdev); 82 int irq; 83 int ret = 0; 84 struct ath_hw *ah; 85 char hw_name[64]; 86 87 if (!pdev->dev.platform_data) { 88 dev_err(&pdev->dev, "no platform data specified\n"); 89 ret = -EINVAL; 90 goto err_out; 91 } 92 93 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 94 if (res == NULL) { 95 dev_err(&pdev->dev, "no memory resource found\n"); 96 ret = -ENXIO; 97 goto err_out; 98 } 99 100 mem = ioremap_nocache(res->start, resource_size(res)); 101 if (mem == NULL) { 102 dev_err(&pdev->dev, "ioremap failed\n"); 103 ret = -ENOMEM; 104 goto err_out; 105 } 106 107 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 108 if (res == NULL) { 109 dev_err(&pdev->dev, "no IRQ resource found\n"); 110 ret = -ENXIO; 111 goto err_iounmap; 112 } 113 114 irq = res->start; 115 116 hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops); 117 if (hw == NULL) { 118 dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); 119 ret = -ENOMEM; 120 goto err_iounmap; 121 } 122 123 SET_IEEE80211_DEV(hw, &pdev->dev); 124 platform_set_drvdata(pdev, hw); 125 126 sc = hw->priv; 127 sc->hw = hw; 128 sc->dev = &pdev->dev; 129 sc->mem = mem; 130 sc->irq = irq; 131 132 /* Will be cleared in ath9k_start() */ 133 set_bit(SC_OP_INVALID, &sc->sc_flags); 134 135 ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc); 136 if (ret) { 137 dev_err(&pdev->dev, "request_irq failed\n"); 138 goto err_free_hw; 139 } 140 141 ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops); 142 if (ret) { 143 dev_err(&pdev->dev, "failed to initialize device\n"); 144 goto err_irq; 145 } 146 147 ah = sc->sc_ah; 148 ath9k_hw_name(ah, hw_name, sizeof(hw_name)); 149 wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n", 150 hw_name, (unsigned long)mem, irq); 151 152 return 0; 153 154 err_irq: 155 free_irq(irq, sc); 156 err_free_hw: 157 ieee80211_free_hw(hw); 158 platform_set_drvdata(pdev, NULL); 159 err_iounmap: 160 iounmap(mem); 161 err_out: 162 return ret; 163 } 164 165 static int ath_ahb_remove(struct platform_device *pdev) 166 { 167 struct ieee80211_hw *hw = platform_get_drvdata(pdev); 168 169 if (hw) { 170 struct ath_softc *sc = hw->priv; 171 void __iomem *mem = sc->mem; 172 173 ath9k_deinit_device(sc); 174 free_irq(sc->irq, sc); 175 ieee80211_free_hw(sc->hw); 176 iounmap(mem); 177 platform_set_drvdata(pdev, NULL); 178 } 179 180 return 0; 181 } 182 183 static struct platform_driver ath_ahb_driver = { 184 .probe = ath_ahb_probe, 185 .remove = ath_ahb_remove, 186 .driver = { 187 .name = "ath9k", 188 .owner = THIS_MODULE, 189 }, 190 .id_table = ath9k_platform_id_table, 191 }; 192 193 MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table); 194 195 int ath_ahb_init(void) 196 { 197 return platform_driver_register(&ath_ahb_driver); 198 } 199 200 void ath_ahb_exit(void) 201 { 202 platform_driver_unregister(&ath_ahb_driver); 203 } 204