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1/*
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>
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/module.h>
20#include <linux/nl80211.h>
21#include <linux/platform_device.h>
22#include <linux/etherdevice.h>
23#include <ath25_platform.h>
24#include "ath5k.h"
25#include "debug.h"
26#include "base.h"
27#include "reg.h"
28
29/* return bus cachesize in 4B word units */
30static void ath5k_ahb_read_cachesize(struct ath_common *common, int *csz)
31{
32 *csz = L1_CACHE_BYTES >> 2;
33}
34
35static bool
36ath5k_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
37{
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;
42
43 eeprom = (u16 *) bcfg->radio;
44 eeprom_end = ((void *) bcfg->config) + BOARD_CONFIG_BUFSZ;
45
46 eeprom += off;
47 if (eeprom > eeprom_end)
48 return false;
49
50 *data = *eeprom;
51 return true;
52}
53
54int ath5k_hw_read_srev(struct ath5k_hw *ah)
55{
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;
59 return 0;
60}
61
62static int ath5k_ahb_eeprom_read_mac(struct ath5k_hw *ah, u8 *mac)
63{
64 struct platform_device *pdev = to_platform_device(ah->dev);
65 struct ar231x_board_config *bcfg = dev_get_platdata(&pdev->dev);
66 u8 *cfg_mac;
67
68 if (to_platform_device(ah->dev)->id == 0)
69 cfg_mac = bcfg->config->wlan0_mac;
70 else
71 cfg_mac = bcfg->config->wlan1_mac;
72
73 memcpy(mac, cfg_mac, ETH_ALEN);
74 return 0;
75}
76
77static 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,
82};
83
84/*Initialization*/
85static int ath_ahb_probe(struct platform_device *pdev)
86{
87 struct ar231x_board_config *bcfg = dev_get_platdata(&pdev->dev);
88 struct ath5k_hw *ah;
89 struct ieee80211_hw *hw;
90 struct resource *res;
91 void __iomem *mem;
92 int irq;
93 int ret = 0;
94 u32 reg;
95
96 if (!dev_get_platdata(&pdev->dev)) {
97 dev_err(&pdev->dev, "no platform data specified\n");
98 ret = -EINVAL;
99 goto err_out;
100 }
101
102 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
103 if (res == NULL) {
104 dev_err(&pdev->dev, "no memory resource found\n");
105 ret = -ENXIO;
106 goto err_out;
107 }
108
109 mem = ioremap(res->start, resource_size(res));
110 if (mem == NULL) {
111 dev_err(&pdev->dev, "ioremap failed\n");
112 ret = -ENOMEM;
113 goto err_out;
114 }
115
116 irq = platform_get_irq(pdev, 0);
117 if (irq < 0) {
118 ret = irq;
119 goto err_iounmap;
120 }
121
122 hw = ieee80211_alloc_hw(sizeof(struct ath5k_hw), &ath5k_hw_ops);
123 if (hw == NULL) {
124 dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
125 ret = -ENOMEM;
126 goto err_iounmap;
127 }
128
129 ah = hw->priv;
130 ah->hw = hw;
131 ah->dev = &pdev->dev;
132 ah->iobase = mem;
133 ah->irq = irq;
134 ah->devid = bcfg->devid;
135
136 if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
137 /* Enable WMAC AHB arbitration */
138 reg = ioread32((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
139 reg |= AR5K_AR2315_AHB_ARB_CTL_WLAN;
140 iowrite32(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
141
142 /* Enable global WMAC swapping */
143 reg = ioread32((void __iomem *) AR5K_AR2315_BYTESWAP);
144 reg |= AR5K_AR2315_BYTESWAP_WMAC;
145 iowrite32(reg, (void __iomem *) AR5K_AR2315_BYTESWAP);
146 } else {
147 /* Enable WMAC DMA access (assuming 5312 or 231x*/
148 /* TODO: check other platforms */
149 reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE);
150 if (to_platform_device(ah->dev)->id == 0)
151 reg |= AR5K_AR5312_ENABLE_WLAN0;
152 else
153 reg |= AR5K_AR5312_ENABLE_WLAN1;
154 iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE);
155
156 /*
157 * On a dual-band AR5312, the multiband radio is only
158 * used as pass-through. Disable 2 GHz support in the
159 * driver for it
160 */
161 if (to_platform_device(ah->dev)->id == 0 &&
162 (bcfg->config->flags & (BD_WLAN0 | BD_WLAN1)) ==
163 (BD_WLAN1 | BD_WLAN0))
164 ah->ah_capabilities.cap_needs_2GHz_ovr = true;
165 else
166 ah->ah_capabilities.cap_needs_2GHz_ovr = false;
167 }
168
169 ret = ath5k_init_ah(ah, &ath_ahb_bus_ops);
170 if (ret != 0) {
171 dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret);
172 ret = -ENODEV;
173 goto err_free_hw;
174 }
175
176 platform_set_drvdata(pdev, hw);
177
178 return 0;
179
180 err_free_hw:
181 ieee80211_free_hw(hw);
182 err_iounmap:
183 iounmap(mem);
184 err_out:
185 return ret;
186}
187
188static void ath_ahb_remove(struct platform_device *pdev)
189{
190 struct ar231x_board_config *bcfg = dev_get_platdata(&pdev->dev);
191 struct ieee80211_hw *hw = platform_get_drvdata(pdev);
192 struct ath5k_hw *ah;
193 u32 reg;
194
195 if (!hw)
196 return;
197
198 ah = hw->priv;
199
200 if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
201 /* Disable WMAC AHB arbitration */
202 reg = ioread32((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
203 reg &= ~AR5K_AR2315_AHB_ARB_CTL_WLAN;
204 iowrite32(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
205 } else {
206 /*Stop DMA access */
207 reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE);
208 if (to_platform_device(ah->dev)->id == 0)
209 reg &= ~AR5K_AR5312_ENABLE_WLAN0;
210 else
211 reg &= ~AR5K_AR5312_ENABLE_WLAN1;
212 iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE);
213 }
214
215 ath5k_deinit_ah(ah);
216 iounmap(ah->iobase);
217 ieee80211_free_hw(hw);
218}
219
220static struct platform_driver ath_ahb_driver = {
221 .probe = ath_ahb_probe,
222 .remove_new = ath_ahb_remove,
223 .driver = {
224 .name = "ar231x-wmac",
225 },
226};
227
228module_platform_driver(ath_ahb_driver);
1/*
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>
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/etherdevice.h>
22#include <linux/export.h>
23#include <ar231x_platform.h>
24#include "ath5k.h"
25#include "debug.h"
26#include "base.h"
27#include "reg.h"
28
29/* return bus cachesize in 4B word units */
30static void ath5k_ahb_read_cachesize(struct ath_common *common, int *csz)
31{
32 *csz = L1_CACHE_BYTES >> 2;
33}
34
35static bool
36ath5k_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
37{
38 struct ath5k_hw *ah = common->priv;
39 struct platform_device *pdev = to_platform_device(ah->dev);
40 struct ar231x_board_config *bcfg = pdev->dev.platform_data;
41 u16 *eeprom, *eeprom_end;
42
43
44
45 bcfg = pdev->dev.platform_data;
46 eeprom = (u16 *) bcfg->radio;
47 eeprom_end = ((void *) bcfg->config) + BOARD_CONFIG_BUFSZ;
48
49 eeprom += off;
50 if (eeprom > eeprom_end)
51 return false;
52
53 *data = *eeprom;
54 return true;
55}
56
57int ath5k_hw_read_srev(struct ath5k_hw *ah)
58{
59 struct platform_device *pdev = to_platform_device(ah->dev);
60 struct ar231x_board_config *bcfg = pdev->dev.platform_data;
61 ah->ah_mac_srev = bcfg->devid;
62 return 0;
63}
64
65static int ath5k_ahb_eeprom_read_mac(struct ath5k_hw *ah, u8 *mac)
66{
67 struct platform_device *pdev = to_platform_device(ah->dev);
68 struct ar231x_board_config *bcfg = pdev->dev.platform_data;
69 u8 *cfg_mac;
70
71 if (to_platform_device(ah->dev)->id == 0)
72 cfg_mac = bcfg->config->wlan0_mac;
73 else
74 cfg_mac = bcfg->config->wlan1_mac;
75
76 memcpy(mac, cfg_mac, ETH_ALEN);
77 return 0;
78}
79
80static const struct ath_bus_ops ath_ahb_bus_ops = {
81 .ath_bus_type = ATH_AHB,
82 .read_cachesize = ath5k_ahb_read_cachesize,
83 .eeprom_read = ath5k_ahb_eeprom_read,
84 .eeprom_read_mac = ath5k_ahb_eeprom_read_mac,
85};
86
87/*Initialization*/
88static int ath_ahb_probe(struct platform_device *pdev)
89{
90 struct ar231x_board_config *bcfg = pdev->dev.platform_data;
91 struct ath5k_hw *ah;
92 struct ieee80211_hw *hw;
93 struct resource *res;
94 void __iomem *mem;
95 int irq;
96 int ret = 0;
97 u32 reg;
98
99 if (!pdev->dev.platform_data) {
100 dev_err(&pdev->dev, "no platform data specified\n");
101 ret = -EINVAL;
102 goto err_out;
103 }
104
105 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
106 if (res == NULL) {
107 dev_err(&pdev->dev, "no memory resource found\n");
108 ret = -ENXIO;
109 goto err_out;
110 }
111
112 mem = ioremap_nocache(res->start, resource_size(res));
113 if (mem == NULL) {
114 dev_err(&pdev->dev, "ioremap failed\n");
115 ret = -ENOMEM;
116 goto err_out;
117 }
118
119 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
120 if (res == NULL) {
121 dev_err(&pdev->dev, "no IRQ resource found\n");
122 ret = -ENXIO;
123 goto err_iounmap;
124 }
125
126 irq = res->start;
127
128 hw = ieee80211_alloc_hw(sizeof(struct ath5k_hw), &ath5k_hw_ops);
129 if (hw == NULL) {
130 dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
131 ret = -ENOMEM;
132 goto err_iounmap;
133 }
134
135 ah = hw->priv;
136 ah->hw = hw;
137 ah->dev = &pdev->dev;
138 ah->iobase = mem;
139 ah->irq = irq;
140 ah->devid = bcfg->devid;
141
142 if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
143 /* Enable WMAC AHB arbitration */
144 reg = ioread32((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
145 reg |= AR5K_AR2315_AHB_ARB_CTL_WLAN;
146 iowrite32(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
147
148 /* Enable global WMAC swapping */
149 reg = ioread32((void __iomem *) AR5K_AR2315_BYTESWAP);
150 reg |= AR5K_AR2315_BYTESWAP_WMAC;
151 iowrite32(reg, (void __iomem *) AR5K_AR2315_BYTESWAP);
152 } else {
153 /* Enable WMAC DMA access (assuming 5312 or 231x*/
154 /* TODO: check other platforms */
155 reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE);
156 if (to_platform_device(ah->dev)->id == 0)
157 reg |= AR5K_AR5312_ENABLE_WLAN0;
158 else
159 reg |= AR5K_AR5312_ENABLE_WLAN1;
160 iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE);
161
162 /*
163 * On a dual-band AR5312, the multiband radio is only
164 * used as pass-through. Disable 2 GHz support in the
165 * driver for it
166 */
167 if (to_platform_device(ah->dev)->id == 0 &&
168 (bcfg->config->flags & (BD_WLAN0 | BD_WLAN1)) ==
169 (BD_WLAN1 | BD_WLAN0))
170 ah->ah_capabilities.cap_needs_2GHz_ovr = true;
171 else
172 ah->ah_capabilities.cap_needs_2GHz_ovr = false;
173 }
174
175 ret = ath5k_init_ah(ah, &ath_ahb_bus_ops);
176 if (ret != 0) {
177 dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret);
178 ret = -ENODEV;
179 goto err_free_hw;
180 }
181
182 platform_set_drvdata(pdev, hw);
183
184 return 0;
185
186 err_free_hw:
187 ieee80211_free_hw(hw);
188 platform_set_drvdata(pdev, NULL);
189 err_iounmap:
190 iounmap(mem);
191 err_out:
192 return ret;
193}
194
195static int ath_ahb_remove(struct platform_device *pdev)
196{
197 struct ar231x_board_config *bcfg = pdev->dev.platform_data;
198 struct ieee80211_hw *hw = platform_get_drvdata(pdev);
199 struct ath5k_hw *ah;
200 u32 reg;
201
202 if (!hw)
203 return 0;
204
205 ah = hw->priv;
206
207 if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
208 /* Disable WMAC AHB arbitration */
209 reg = ioread32((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
210 reg &= ~AR5K_AR2315_AHB_ARB_CTL_WLAN;
211 iowrite32(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
212 } else {
213 /*Stop DMA access */
214 reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE);
215 if (to_platform_device(ah->dev)->id == 0)
216 reg &= ~AR5K_AR5312_ENABLE_WLAN0;
217 else
218 reg &= ~AR5K_AR5312_ENABLE_WLAN1;
219 iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE);
220 }
221
222 ath5k_deinit_ah(ah);
223 iounmap(ah->iobase);
224 platform_set_drvdata(pdev, NULL);
225 ieee80211_free_hw(hw);
226
227 return 0;
228}
229
230static struct platform_driver ath_ahb_driver = {
231 .probe = ath_ahb_probe,
232 .remove = ath_ahb_remove,
233 .driver = {
234 .name = "ar231x-wmac",
235 .owner = THIS_MODULE,
236 },
237};
238
239static int __init
240ath5k_ahb_init(void)
241{
242 return platform_driver_register(&ath_ahb_driver);
243}
244
245static void __exit
246ath5k_ahb_exit(void)
247{
248 platform_driver_unregister(&ath_ahb_driver);
249}
250
251module_init(ath5k_ahb_init);
252module_exit(ath5k_ahb_exit);