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a0b907ee FF |
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> | |
fa9bfd61 | 21 | #include <linux/etherdevice.h> |
32b92f4f | 22 | #include <linux/export.h> |
a0b907ee FF |
23 | #include <ar231x_platform.h> |
24 | #include "ath5k.h" | |
25 | #include "debug.h" | |
26 | #include "base.h" | |
27 | #include "reg.h" | |
a0b907ee FF |
28 | |
29 | /* return bus cachesize in 4B word units */ | |
30 | static void ath5k_ahb_read_cachesize(struct ath_common *common, int *csz) | |
31 | { | |
32 | *csz = L1_CACHE_BYTES >> 2; | |
33 | } | |
34 | ||
fda9b7af WD |
35 | static bool |
36 | ath5k_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data) | |
a0b907ee | 37 | { |
e0d687bd PR |
38 | struct ath5k_hw *ah = common->priv; |
39 | struct platform_device *pdev = to_platform_device(ah->dev); | |
a0b907ee FF |
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) | |
fda9b7af | 51 | return false; |
a0b907ee FF |
52 | |
53 | *data = *eeprom; | |
fda9b7af | 54 | return true; |
a0b907ee FF |
55 | } |
56 | ||
57 | int ath5k_hw_read_srev(struct ath5k_hw *ah) | |
58 | { | |
e0d687bd | 59 | struct platform_device *pdev = to_platform_device(ah->dev); |
a0b907ee FF |
60 | struct ar231x_board_config *bcfg = pdev->dev.platform_data; |
61 | ah->ah_mac_srev = bcfg->devid; | |
62 | return 0; | |
63 | } | |
64 | ||
fa9bfd61 FF |
65 | static int ath5k_ahb_eeprom_read_mac(struct ath5k_hw *ah, u8 *mac) |
66 | { | |
e0d687bd | 67 | struct platform_device *pdev = to_platform_device(ah->dev); |
fa9bfd61 FF |
68 | struct ar231x_board_config *bcfg = pdev->dev.platform_data; |
69 | u8 *cfg_mac; | |
70 | ||
e0d687bd | 71 | if (to_platform_device(ah->dev)->id == 0) |
fa9bfd61 FF |
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 | ||
a0b907ee FF |
80 | static 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, | |
fa9bfd61 | 84 | .eeprom_read_mac = ath5k_ahb_eeprom_read_mac, |
a0b907ee FF |
85 | }; |
86 | ||
87 | /*Initialization*/ | |
88 | static int ath_ahb_probe(struct platform_device *pdev) | |
89 | { | |
90 | struct ar231x_board_config *bcfg = pdev->dev.platform_data; | |
e0d687bd | 91 | struct ath5k_hw *ah; |
a0b907ee FF |
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 | ||
9ac47933 | 112 | mem = ioremap_nocache(res->start, resource_size(res)); |
a0b907ee FF |
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; | |
2db0d2ba | 123 | goto err_iounmap; |
a0b907ee FF |
124 | } |
125 | ||
126 | irq = res->start; | |
127 | ||
e0d687bd | 128 | hw = ieee80211_alloc_hw(sizeof(struct ath5k_hw), &ath5k_hw_ops); |
a0b907ee FF |
129 | if (hw == NULL) { |
130 | dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); | |
131 | ret = -ENOMEM; | |
2db0d2ba | 132 | goto err_iounmap; |
a0b907ee FF |
133 | } |
134 | ||
e0d687bd PR |
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; | |
a0b907ee FF |
141 | |
142 | if (bcfg->devid >= AR5K_SREV_AR2315_R6) { | |
143 | /* Enable WMAC AHB arbitration */ | |
cede8b64 | 144 | reg = ioread32((void __iomem *) AR5K_AR2315_AHB_ARB_CTL); |
a0b907ee | 145 | reg |= AR5K_AR2315_AHB_ARB_CTL_WLAN; |
cede8b64 | 146 | iowrite32(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL); |
a0b907ee FF |
147 | |
148 | /* Enable global WMAC swapping */ | |
cede8b64 | 149 | reg = ioread32((void __iomem *) AR5K_AR2315_BYTESWAP); |
a0b907ee | 150 | reg |= AR5K_AR2315_BYTESWAP_WMAC; |
cede8b64 | 151 | iowrite32(reg, (void __iomem *) AR5K_AR2315_BYTESWAP); |
a0b907ee FF |
152 | } else { |
153 | /* Enable WMAC DMA access (assuming 5312 or 231x*/ | |
154 | /* TODO: check other platforms */ | |
cede8b64 | 155 | reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE); |
e0d687bd | 156 | if (to_platform_device(ah->dev)->id == 0) |
a0b907ee FF |
157 | reg |= AR5K_AR5312_ENABLE_WLAN0; |
158 | else | |
159 | reg |= AR5K_AR5312_ENABLE_WLAN1; | |
cede8b64 | 160 | iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE); |
3a9dddea FF |
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 | */ | |
e0d687bd | 167 | if (to_platform_device(ah->dev)->id == 0 && |
e4bbf2f5 PR |
168 | (bcfg->config->flags & (BD_WLAN0 | BD_WLAN1)) == |
169 | (BD_WLAN1 | BD_WLAN0)) | |
86f62d9b NK |
170 | ah->ah_capabilities.cap_needs_2GHz_ovr = true; |
171 | else | |
172 | ah->ah_capabilities.cap_needs_2GHz_ovr = false; | |
a0b907ee FF |
173 | } |
174 | ||
bb1f3ad9 | 175 | ret = ath5k_init_ah(ah, &ath_ahb_bus_ops); |
a0b907ee FF |
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); | |
2db0d2ba JB |
189 | err_iounmap: |
190 | iounmap(mem); | |
a0b907ee FF |
191 | err_out: |
192 | return ret; | |
193 | } | |
194 | ||
195 | static 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); | |
e0d687bd | 199 | struct ath5k_hw *ah; |
a0b907ee FF |
200 | u32 reg; |
201 | ||
202 | if (!hw) | |
203 | return 0; | |
204 | ||
e0d687bd | 205 | ah = hw->priv; |
a0b907ee FF |
206 | |
207 | if (bcfg->devid >= AR5K_SREV_AR2315_R6) { | |
208 | /* Disable WMAC AHB arbitration */ | |
cede8b64 | 209 | reg = ioread32((void __iomem *) AR5K_AR2315_AHB_ARB_CTL); |
a0b907ee | 210 | reg &= ~AR5K_AR2315_AHB_ARB_CTL_WLAN; |
cede8b64 | 211 | iowrite32(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL); |
a0b907ee FF |
212 | } else { |
213 | /*Stop DMA access */ | |
cede8b64 | 214 | reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE); |
e0d687bd | 215 | if (to_platform_device(ah->dev)->id == 0) |
a0b907ee FF |
216 | reg &= ~AR5K_AR5312_ENABLE_WLAN0; |
217 | else | |
218 | reg &= ~AR5K_AR5312_ENABLE_WLAN1; | |
cede8b64 | 219 | iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE); |
a0b907ee FF |
220 | } |
221 | ||
bb1f3ad9 | 222 | ath5k_deinit_ah(ah); |
3708dc24 | 223 | iounmap(ah->iobase); |
a0b907ee | 224 | platform_set_drvdata(pdev, NULL); |
536e5189 | 225 | ieee80211_free_hw(hw); |
a0b907ee FF |
226 | |
227 | return 0; | |
228 | } | |
229 | ||
230 | static 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 | ||
239 | static int __init | |
240 | ath5k_ahb_init(void) | |
241 | { | |
242 | return platform_driver_register(&ath_ahb_driver); | |
243 | } | |
244 | ||
245 | static void __exit | |
246 | ath5k_ahb_exit(void) | |
247 | { | |
248 | platform_driver_unregister(&ath_ahb_driver); | |
249 | } | |
250 | ||
251 | module_init(ath5k_ahb_init); | |
252 | module_exit(ath5k_ahb_exit); |