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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/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 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
117 if (res == NULL) {
118 dev_err(&pdev->dev, "no IRQ resource found\n");
119 ret = -ENXIO;
120 goto err_iounmap;
121 }
122
123 irq = res->start;
124
125 hw = ieee80211_alloc_hw(sizeof(struct ath5k_hw), &ath5k_hw_ops);
126 if (hw == NULL) {
127 dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
128 ret = -ENOMEM;
129 goto err_iounmap;
130 }
131
132 ah = hw->priv;
133 ah->hw = hw;
134 ah->dev = &pdev->dev;
135 ah->iobase = mem;
136 ah->irq = irq;
137 ah->devid = bcfg->devid;
138
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);
144
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);
149 } else {
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;
155 else
156 reg |= AR5K_AR5312_ENABLE_WLAN1;
157 iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE);
158
159 /*
160 * On a dual-band AR5312, the multiband radio is only
161 * used as pass-through. Disable 2 GHz support in the
162 * driver for it
163 */
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;
168 else
169 ah->ah_capabilities.cap_needs_2GHz_ovr = false;
170 }
171
172 ret = ath5k_init_ah(ah, &ath_ahb_bus_ops);
173 if (ret != 0) {
174 dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret);
175 ret = -ENODEV;
176 goto err_free_hw;
177 }
178
179 platform_set_drvdata(pdev, hw);
180
181 return 0;
182
183 err_free_hw:
184 ieee80211_free_hw(hw);
185 err_iounmap:
186 iounmap(mem);
187 err_out:
188 return ret;
189}
190
191static int ath_ahb_remove(struct platform_device *pdev)
192{
193 struct ar231x_board_config *bcfg = dev_get_platdata(&pdev->dev);
194 struct ieee80211_hw *hw = platform_get_drvdata(pdev);
195 struct ath5k_hw *ah;
196 u32 reg;
197
198 if (!hw)
199 return 0;
200
201 ah = hw->priv;
202
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);
208 } else {
209 /*Stop DMA access */
210 reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE);
211 if (to_platform_device(ah->dev)->id == 0)
212 reg &= ~AR5K_AR5312_ENABLE_WLAN0;
213 else
214 reg &= ~AR5K_AR5312_ENABLE_WLAN1;
215 iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE);
216 }
217
218 ath5k_deinit_ah(ah);
219 iounmap(ah->iobase);
220 ieee80211_free_hw(hw);
221
222 return 0;
223}
224
225static struct platform_driver ath_ahb_driver = {
226 .probe = ath_ahb_probe,
227 .remove = ath_ahb_remove,
228 .driver = {
229 .name = "ar231x-wmac",
230 },
231};
232
233module_platform_driver(ath_ahb_driver);