Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 1 | /* |
Sujith | cee075a | 2009-03-13 09:07:23 +0530 | [diff] [blame] | 2 | * Copyright (c) 2008-2009 Atheros Communications Inc. |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 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> |
Gabor Juhos | 9dbeb91 | 2009-01-14 20:17:08 +0100 | [diff] [blame] | 21 | #include <linux/ath9k_platform.h> |
Sujith | 394cf0a | 2009-02-09 13:26:54 +0530 | [diff] [blame] | 22 | #include "ath9k.h" |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 23 | |
| 24 | /* return bus cachesize in 4B word units */ |
Luis R. Rodriguez | 5bb1279 | 2009-09-14 00:55:09 -0700 | [diff] [blame] | 25 | static void ath_ahb_read_cachesize(struct ath_common *common, int *csz) |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 26 | { |
| 27 | *csz = L1_CACHE_BYTES >> 2; |
| 28 | } |
| 29 | |
Luis R. Rodriguez | 5bb1279 | 2009-09-14 00:55:09 -0700 | [diff] [blame] | 30 | static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data) |
Gabor Juhos | 9dbeb91 | 2009-01-14 20:17:08 +0100 | [diff] [blame] | 31 | { |
Marek Lindner | e307fcf | 2009-10-14 23:04:45 +0800 | [diff] [blame] | 32 | struct ath_softc *sc = (struct ath_softc *)common->priv; |
Gabor Juhos | 9dbeb91 | 2009-01-14 20:17:08 +0100 | [diff] [blame] | 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))) { |
Joe Perches | 3800276 | 2010-12-02 19:12:36 -0800 | [diff] [blame] | 38 | ath_err(common, |
| 39 | "%s: flash read failed, offset %08x is out of range\n", |
| 40 | __func__, off); |
Gabor Juhos | 9dbeb91 | 2009-01-14 20:17:08 +0100 | [diff] [blame] | 41 | return false; |
| 42 | } |
| 43 | |
| 44 | *data = pdata->eeprom_data[off]; |
| 45 | return true; |
| 46 | } |
| 47 | |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 48 | static struct ath_bus_ops ath_ahb_bus_ops = { |
Sujith | 497ad9a | 2010-04-01 10:28:20 +0530 | [diff] [blame] | 49 | .ath_bus_type = ATH_AHB, |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 50 | .read_cachesize = ath_ahb_read_cachesize, |
Gabor Juhos | 9dbeb91 | 2009-01-14 20:17:08 +0100 | [diff] [blame] | 51 | .eeprom_read = ath_ahb_eeprom_read, |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 52 | }; |
| 53 | |
| 54 | static int ath_ahb_probe(struct platform_device *pdev) |
| 55 | { |
| 56 | void __iomem *mem; |
Gabor Juhos | 9251f0b | 2009-03-06 09:57:38 +0100 | [diff] [blame] | 57 | struct ath_wiphy *aphy; |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 58 | struct ath_softc *sc; |
| 59 | struct ieee80211_hw *hw; |
| 60 | struct resource *res; |
| 61 | int irq; |
| 62 | int ret = 0; |
Sujith | cbe61d8 | 2009-02-09 13:27:12 +0530 | [diff] [blame] | 63 | struct ath_hw *ah; |
Luis R. Rodriguez | f934c4d | 2009-10-27 12:59:34 -0400 | [diff] [blame] | 64 | char hw_name[64]; |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 65 | |
Gabor Juhos | 9dbeb91 | 2009-01-14 20:17:08 +0100 | [diff] [blame] | 66 | if (!pdev->dev.platform_data) { |
| 67 | dev_err(&pdev->dev, "no platform data specified\n"); |
| 68 | ret = -EINVAL; |
| 69 | goto err_out; |
| 70 | } |
| 71 | |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 72 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 73 | if (res == NULL) { |
| 74 | dev_err(&pdev->dev, "no memory resource found\n"); |
| 75 | ret = -ENXIO; |
| 76 | goto err_out; |
| 77 | } |
| 78 | |
| 79 | mem = ioremap_nocache(res->start, res->end - res->start + 1); |
| 80 | if (mem == NULL) { |
| 81 | dev_err(&pdev->dev, "ioremap failed\n"); |
| 82 | ret = -ENOMEM; |
| 83 | goto err_out; |
| 84 | } |
| 85 | |
| 86 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 87 | if (res == NULL) { |
| 88 | dev_err(&pdev->dev, "no IRQ resource found\n"); |
| 89 | ret = -ENXIO; |
| 90 | goto err_iounmap; |
| 91 | } |
| 92 | |
| 93 | irq = res->start; |
| 94 | |
Jouni Malinen | bce048d | 2009-03-03 19:23:28 +0200 | [diff] [blame] | 95 | hw = ieee80211_alloc_hw(sizeof(struct ath_wiphy) + |
| 96 | sizeof(struct ath_softc), &ath9k_ops); |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 97 | if (hw == NULL) { |
| 98 | dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); |
| 99 | ret = -ENOMEM; |
| 100 | goto err_iounmap; |
| 101 | } |
| 102 | |
| 103 | SET_IEEE80211_DEV(hw, &pdev->dev); |
| 104 | platform_set_drvdata(pdev, hw); |
| 105 | |
Jouni Malinen | bce048d | 2009-03-03 19:23:28 +0200 | [diff] [blame] | 106 | aphy = hw->priv; |
| 107 | sc = (struct ath_softc *) (aphy + 1); |
| 108 | aphy->sc = sc; |
| 109 | aphy->hw = hw; |
| 110 | sc->pri_wiphy = aphy; |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 111 | sc->hw = hw; |
| 112 | sc->dev = &pdev->dev; |
| 113 | sc->mem = mem; |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 114 | sc->irq = irq; |
| 115 | |
Sujith | 5e4ea1f | 2010-01-14 10:20:57 +0530 | [diff] [blame] | 116 | /* Will be cleared in ath9k_start() */ |
| 117 | sc->sc_flags |= SC_OP_INVALID; |
| 118 | |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 119 | ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc); |
| 120 | if (ret) { |
Luis R. Rodriguez | 580171f | 2009-09-02 17:02:18 -0700 | [diff] [blame] | 121 | dev_err(&pdev->dev, "request_irq failed\n"); |
Sujith | 285f2dd | 2010-01-08 10:36:07 +0530 | [diff] [blame] | 122 | goto err_free_hw; |
| 123 | } |
| 124 | |
| 125 | ret = ath9k_init_device(AR5416_AR9100_DEVID, sc, 0x0, &ath_ahb_bus_ops); |
| 126 | if (ret) { |
| 127 | dev_err(&pdev->dev, "failed to initialize device\n"); |
| 128 | goto err_irq; |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | ah = sc->sc_ah; |
Luis R. Rodriguez | f934c4d | 2009-10-27 12:59:34 -0400 | [diff] [blame] | 132 | ath9k_hw_name(ah, hw_name, sizeof(hw_name)); |
Joe Perches | c96c31e | 2010-07-26 14:39:58 -0700 | [diff] [blame] | 133 | wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n", |
| 134 | hw_name, (unsigned long)mem, irq); |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 135 | |
| 136 | return 0; |
| 137 | |
Sujith | 285f2dd | 2010-01-08 10:36:07 +0530 | [diff] [blame] | 138 | err_irq: |
| 139 | free_irq(irq, sc); |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 140 | err_free_hw: |
| 141 | ieee80211_free_hw(hw); |
| 142 | platform_set_drvdata(pdev, NULL); |
| 143 | err_iounmap: |
| 144 | iounmap(mem); |
| 145 | err_out: |
| 146 | return ret; |
| 147 | } |
| 148 | |
| 149 | static int ath_ahb_remove(struct platform_device *pdev) |
| 150 | { |
| 151 | struct ieee80211_hw *hw = platform_get_drvdata(pdev); |
| 152 | |
| 153 | if (hw) { |
Jouni Malinen | bce048d | 2009-03-03 19:23:28 +0200 | [diff] [blame] | 154 | struct ath_wiphy *aphy = hw->priv; |
| 155 | struct ath_softc *sc = aphy->sc; |
Pavel Roskin | ab5132a | 2010-01-30 21:37:24 -0500 | [diff] [blame] | 156 | void __iomem *mem = sc->mem; |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 157 | |
Sujith | 285f2dd | 2010-01-08 10:36:07 +0530 | [diff] [blame] | 158 | ath9k_deinit_device(sc); |
| 159 | free_irq(sc->irq, sc); |
| 160 | ieee80211_free_hw(sc->hw); |
Pavel Roskin | ab5132a | 2010-01-30 21:37:24 -0500 | [diff] [blame] | 161 | iounmap(mem); |
Gabor Juhos | 09329d3 | 2009-01-14 20:17:07 +0100 | [diff] [blame] | 162 | platform_set_drvdata(pdev, NULL); |
| 163 | } |
| 164 | |
| 165 | return 0; |
| 166 | } |
| 167 | |
| 168 | static struct platform_driver ath_ahb_driver = { |
| 169 | .probe = ath_ahb_probe, |
| 170 | .remove = ath_ahb_remove, |
| 171 | .driver = { |
| 172 | .name = "ath9k", |
| 173 | .owner = THIS_MODULE, |
| 174 | }, |
| 175 | }; |
| 176 | |
| 177 | int ath_ahb_init(void) |
| 178 | { |
| 179 | return platform_driver_register(&ath_ahb_driver); |
| 180 | } |
| 181 | |
| 182 | void ath_ahb_exit(void) |
| 183 | { |
| 184 | platform_driver_unregister(&ath_ahb_driver); |
| 185 | } |