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/mod_devicetable.h> 20 #include <linux/module.h> 21 #include <linux/nl80211.h> 22 #include <linux/of.h> 23 #include <linux/platform_device.h> 24 25 #include "ath9k.h" 26 27 static const struct of_device_id ath9k_of_match_table[] = { 28 { .compatible = "qca,ar9130-wifi", .data = (void *)AR5416_AR9100_DEVID }, 29 { .compatible = "qca,ar9330-wifi", .data = (void *)AR9300_DEVID_AR9330 }, 30 { .compatible = "qca,ar9340-wifi", .data = (void *)AR9300_DEVID_AR9340 }, 31 { .compatible = "qca,qca9530-wifi", .data = (void *)AR9300_DEVID_AR953X }, 32 { .compatible = "qca,qca9550-wifi", .data = (void *)AR9300_DEVID_QCA955X }, 33 { .compatible = "qca,qca9560-wifi", .data = (void *)AR9300_DEVID_QCA956X }, 34 {}, 35 }; 36 37 /* return bus cachesize in 4B word units */ 38 static void ath_ahb_read_cachesize(struct ath_common *common, int *csz) 39 { 40 *csz = L1_CACHE_BYTES >> 2; 41 } 42 43 static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data) 44 { 45 ath_err(common, "%s: eeprom data has to be provided externally\n", 46 __func__); 47 return false; 48 } 49 50 static const struct ath_bus_ops ath_ahb_bus_ops = { 51 .ath_bus_type = ATH_AHB, 52 .read_cachesize = ath_ahb_read_cachesize, 53 .eeprom_read = ath_ahb_eeprom_read, 54 }; 55 56 static int ath_ahb_probe(struct platform_device *pdev) 57 { 58 struct ieee80211_hw *hw; 59 struct ath_softc *sc; 60 struct ath_hw *ah; 61 void __iomem *mem; 62 char hw_name[64]; 63 u16 dev_id; 64 int irq; 65 int ret; 66 67 mem = devm_platform_ioremap_resource(pdev, 0); 68 if (IS_ERR(mem)) { 69 dev_err(&pdev->dev, "ioremap failed\n"); 70 return PTR_ERR(mem); 71 } 72 73 irq = platform_get_irq(pdev, 0); 74 if (irq < 0) 75 return irq; 76 77 ath9k_fill_chanctx_ops(); 78 hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops); 79 if (hw == NULL) { 80 dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); 81 return -ENOMEM; 82 } 83 84 SET_IEEE80211_DEV(hw, &pdev->dev); 85 platform_set_drvdata(pdev, hw); 86 87 sc = hw->priv; 88 sc->hw = hw; 89 sc->dev = &pdev->dev; 90 sc->mem = mem; 91 sc->irq = irq; 92 93 ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc); 94 if (ret) { 95 dev_err(&pdev->dev, "request_irq failed\n"); 96 goto err_free_hw; 97 } 98 99 dev_id = (u16)(kernel_ulong_t)of_device_get_match_data(&pdev->dev); 100 ret = ath9k_init_device(dev_id, sc, &ath_ahb_bus_ops); 101 if (ret) { 102 dev_err(&pdev->dev, "failed to initialize device\n"); 103 goto err_irq; 104 } 105 106 ah = sc->sc_ah; 107 ath9k_hw_name(ah, hw_name, sizeof(hw_name)); 108 wiphy_info(hw->wiphy, "%s mem=0x%p, irq=%d\n", 109 hw_name, mem, irq); 110 111 return 0; 112 113 err_irq: 114 free_irq(irq, sc); 115 err_free_hw: 116 ieee80211_free_hw(hw); 117 return ret; 118 } 119 120 static void ath_ahb_remove(struct platform_device *pdev) 121 { 122 struct ieee80211_hw *hw = platform_get_drvdata(pdev); 123 124 if (hw) { 125 struct ath_softc *sc = hw->priv; 126 127 ath9k_deinit_device(sc); 128 free_irq(sc->irq, sc); 129 ieee80211_free_hw(sc->hw); 130 } 131 } 132 133 static struct platform_driver ath_ahb_driver = { 134 .probe = ath_ahb_probe, 135 .remove = ath_ahb_remove, 136 .driver = { 137 .name = "ath9k", 138 .of_match_table = ath9k_of_match_table, 139 }, 140 }; 141 142 MODULE_DEVICE_TABLE(of, ath9k_of_match_table); 143 144 int ath_ahb_init(void) 145 { 146 return platform_driver_register(&ath_ahb_driver); 147 } 148 149 void ath_ahb_exit(void) 150 { 151 platform_driver_unregister(&ath_ahb_driver); 152 } 153