2 * Copyright (c) 2008-2009 Atheros Communications Inc.
3 * Copyright (c) 2009 Gabor Juhos <juhosg@openwrt.org>
4 * Copyright (c) 2009 Imre Kaloz <kaloz@openwrt.org>
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.
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.
19 #include <linux/nl80211.h>
20 #include <linux/platform_device.h>
21 #include <linux/etherdevice.h>
22 #include <ar231x_platform.h>
28 /* return bus cachesize in 4B word units */
29 static void ath5k_ahb_read_cachesize(struct ath_common *common, int *csz)
31 *csz = L1_CACHE_BYTES >> 2;
35 ath5k_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
37 struct ath5k_hw *ah = common->priv;
38 struct platform_device *pdev = to_platform_device(ah->dev);
39 struct ar231x_board_config *bcfg = pdev->dev.platform_data;
40 u16 *eeprom, *eeprom_end;
44 bcfg = pdev->dev.platform_data;
45 eeprom = (u16 *) bcfg->radio;
46 eeprom_end = ((void *) bcfg->config) + BOARD_CONFIG_BUFSZ;
49 if (eeprom > eeprom_end)
56 int ath5k_hw_read_srev(struct ath5k_hw *ah)
58 struct platform_device *pdev = to_platform_device(ah->dev);
59 struct ar231x_board_config *bcfg = pdev->dev.platform_data;
60 ah->ah_mac_srev = bcfg->devid;
64 static int ath5k_ahb_eeprom_read_mac(struct ath5k_hw *ah, u8 *mac)
66 struct platform_device *pdev = to_platform_device(ah->dev);
67 struct ar231x_board_config *bcfg = pdev->dev.platform_data;
70 if (to_platform_device(ah->dev)->id == 0)
71 cfg_mac = bcfg->config->wlan0_mac;
73 cfg_mac = bcfg->config->wlan1_mac;
75 memcpy(mac, cfg_mac, ETH_ALEN);
79 static const struct ath_bus_ops ath_ahb_bus_ops = {
80 .ath_bus_type = ATH_AHB,
81 .read_cachesize = ath5k_ahb_read_cachesize,
82 .eeprom_read = ath5k_ahb_eeprom_read,
83 .eeprom_read_mac = ath5k_ahb_eeprom_read_mac,
87 static int ath_ahb_probe(struct platform_device *pdev)
89 struct ar231x_board_config *bcfg = pdev->dev.platform_data;
91 struct ieee80211_hw *hw;
98 if (!pdev->dev.platform_data) {
99 dev_err(&pdev->dev, "no platform data specified\n");
104 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
106 dev_err(&pdev->dev, "no memory resource found\n");
111 mem = ioremap_nocache(res->start, resource_size(res));
113 dev_err(&pdev->dev, "ioremap failed\n");
118 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
120 dev_err(&pdev->dev, "no IRQ resource found\n");
127 hw = ieee80211_alloc_hw(sizeof(struct ath5k_hw), &ath5k_hw_ops);
129 dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
136 ah->dev = &pdev->dev;
139 ah->devid = bcfg->devid;
141 if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
142 /* Enable WMAC AHB arbitration */
143 reg = __raw_readl((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
144 reg |= AR5K_AR2315_AHB_ARB_CTL_WLAN;
145 __raw_writel(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
147 /* Enable global WMAC swapping */
148 reg = __raw_readl((void __iomem *) AR5K_AR2315_BYTESWAP);
149 reg |= AR5K_AR2315_BYTESWAP_WMAC;
150 __raw_writel(reg, (void __iomem *) AR5K_AR2315_BYTESWAP);
152 /* Enable WMAC DMA access (assuming 5312 or 231x*/
153 /* TODO: check other platforms */
154 reg = __raw_readl((void __iomem *) AR5K_AR5312_ENABLE);
155 if (to_platform_device(ah->dev)->id == 0)
156 reg |= AR5K_AR5312_ENABLE_WLAN0;
158 reg |= AR5K_AR5312_ENABLE_WLAN1;
159 __raw_writel(reg, (void __iomem *) AR5K_AR5312_ENABLE);
162 * On a dual-band AR5312, the multiband radio is only
163 * used as pass-through. Disable 2 GHz support in the
166 if (to_platform_device(ah->dev)->id == 0 &&
167 (bcfg->config->flags & (BD_WLAN0 | BD_WLAN1)) ==
168 (BD_WLAN1 | BD_WLAN0))
169 __set_bit(ATH_STAT_2G_DISABLED, ah->status);
172 ret = ath5k_init_ah(ah, &ath_ahb_bus_ops);
174 dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret);
179 platform_set_drvdata(pdev, hw);
184 ieee80211_free_hw(hw);
185 platform_set_drvdata(pdev, NULL);
190 static int ath_ahb_remove(struct platform_device *pdev)
192 struct ar231x_board_config *bcfg = pdev->dev.platform_data;
193 struct ieee80211_hw *hw = platform_get_drvdata(pdev);
202 if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
203 /* Disable WMAC AHB arbitration */
204 reg = __raw_readl((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
205 reg &= ~AR5K_AR2315_AHB_ARB_CTL_WLAN;
206 __raw_writel(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
209 reg = __raw_readl((void __iomem *) AR5K_AR5312_ENABLE);
210 if (to_platform_device(ah->dev)->id == 0)
211 reg &= ~AR5K_AR5312_ENABLE_WLAN0;
213 reg &= ~AR5K_AR5312_ENABLE_WLAN1;
214 __raw_writel(reg, (void __iomem *) AR5K_AR5312_ENABLE);
218 platform_set_drvdata(pdev, NULL);
219 ieee80211_free_hw(hw);
224 static struct platform_driver ath_ahb_driver = {
225 .probe = ath_ahb_probe,
226 .remove = ath_ahb_remove,
228 .name = "ar231x-wmac",
229 .owner = THIS_MODULE,
236 return platform_driver_register(&ath_ahb_driver);
242 platform_driver_unregister(&ath_ahb_driver);
245 module_init(ath5k_ahb_init);
246 module_exit(ath5k_ahb_exit);