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 <linux/export.h>
23 #include <ath25_platform.h>
29 /* return bus cachesize in 4B word units */
30 static void ath5k_ahb_read_cachesize(struct ath_common *common, int *csz)
32 *csz = L1_CACHE_BYTES >> 2;
36 ath5k_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
38 struct ath5k_hw *ah = common->priv;
39 struct platform_device *pdev = to_platform_device(ah->dev);
40 struct ar231x_board_config *bcfg = dev_get_platdata(&pdev->dev);
41 u16 *eeprom, *eeprom_end;
43 eeprom = (u16 *) bcfg->radio;
44 eeprom_end = ((void *) bcfg->config) + BOARD_CONFIG_BUFSZ;
47 if (eeprom > eeprom_end)
54 int ath5k_hw_read_srev(struct ath5k_hw *ah)
56 struct platform_device *pdev = to_platform_device(ah->dev);
57 struct ar231x_board_config *bcfg = dev_get_platdata(&pdev->dev);
58 ah->ah_mac_srev = bcfg->devid;
62 static int ath5k_ahb_eeprom_read_mac(struct ath5k_hw *ah, u8 *mac)
64 struct platform_device *pdev = to_platform_device(ah->dev);
65 struct ar231x_board_config *bcfg = dev_get_platdata(&pdev->dev);
68 if (to_platform_device(ah->dev)->id == 0)
69 cfg_mac = bcfg->config->wlan0_mac;
71 cfg_mac = bcfg->config->wlan1_mac;
73 memcpy(mac, cfg_mac, ETH_ALEN);
77 static const struct ath_bus_ops ath_ahb_bus_ops = {
78 .ath_bus_type = ATH_AHB,
79 .read_cachesize = ath5k_ahb_read_cachesize,
80 .eeprom_read = ath5k_ahb_eeprom_read,
81 .eeprom_read_mac = ath5k_ahb_eeprom_read_mac,
85 static int ath_ahb_probe(struct platform_device *pdev)
87 struct ar231x_board_config *bcfg = dev_get_platdata(&pdev->dev);
89 struct ieee80211_hw *hw;
96 if (!dev_get_platdata(&pdev->dev)) {
97 dev_err(&pdev->dev, "no platform data specified\n");
102 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
104 dev_err(&pdev->dev, "no memory resource found\n");
109 mem = ioremap_nocache(res->start, resource_size(res));
111 dev_err(&pdev->dev, "ioremap failed\n");
116 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
118 dev_err(&pdev->dev, "no IRQ resource found\n");
125 hw = ieee80211_alloc_hw(sizeof(struct ath5k_hw), &ath5k_hw_ops);
127 dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
134 ah->dev = &pdev->dev;
137 ah->devid = bcfg->devid;
139 if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
140 /* Enable WMAC AHB arbitration */
141 reg = ioread32((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
142 reg |= AR5K_AR2315_AHB_ARB_CTL_WLAN;
143 iowrite32(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
145 /* Enable global WMAC swapping */
146 reg = ioread32((void __iomem *) AR5K_AR2315_BYTESWAP);
147 reg |= AR5K_AR2315_BYTESWAP_WMAC;
148 iowrite32(reg, (void __iomem *) AR5K_AR2315_BYTESWAP);
150 /* Enable WMAC DMA access (assuming 5312 or 231x*/
151 /* TODO: check other platforms */
152 reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE);
153 if (to_platform_device(ah->dev)->id == 0)
154 reg |= AR5K_AR5312_ENABLE_WLAN0;
156 reg |= AR5K_AR5312_ENABLE_WLAN1;
157 iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE);
160 * On a dual-band AR5312, the multiband radio is only
161 * used as pass-through. Disable 2 GHz support in the
164 if (to_platform_device(ah->dev)->id == 0 &&
165 (bcfg->config->flags & (BD_WLAN0 | BD_WLAN1)) ==
166 (BD_WLAN1 | BD_WLAN0))
167 ah->ah_capabilities.cap_needs_2GHz_ovr = true;
169 ah->ah_capabilities.cap_needs_2GHz_ovr = false;
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);
191 static int ath_ahb_remove(struct platform_device *pdev)
193 struct ar231x_board_config *bcfg = dev_get_platdata(&pdev->dev);
194 struct ieee80211_hw *hw = platform_get_drvdata(pdev);
203 if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
204 /* Disable WMAC AHB arbitration */
205 reg = ioread32((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
206 reg &= ~AR5K_AR2315_AHB_ARB_CTL_WLAN;
207 iowrite32(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
210 reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE);
211 if (to_platform_device(ah->dev)->id == 0)
212 reg &= ~AR5K_AR5312_ENABLE_WLAN0;
214 reg &= ~AR5K_AR5312_ENABLE_WLAN1;
215 iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE);
220 ieee80211_free_hw(hw);
225 static struct platform_driver ath_ahb_driver = {
226 .probe = ath_ahb_probe,
227 .remove = ath_ahb_remove,
229 .name = "ar231x-wmac",
233 module_platform_driver(ath_ahb_driver);