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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * wl12xx SDIO routines
4 *
5 * Copyright (C) 2005 Texas Instruments Incorporated
6 * Copyright (C) 2008 Google Inc
7 * Copyright (C) 2009 Bob Copeland (me@bobcopeland.com)
8 */
9#include <linux/interrupt.h>
10#include <linux/module.h>
11#include <linux/mod_devicetable.h>
12#include <linux/mmc/sdio_func.h>
13#include <linux/mmc/sdio_ids.h>
14#include <linux/platform_device.h>
15#include <linux/irq.h>
16#include <linux/pm_runtime.h>
17#include <linux/of.h>
18#include <linux/of_irq.h>
19
20#include "wl1251.h"
21
22struct wl1251_sdio {
23 struct sdio_func *func;
24 u32 elp_val;
25};
26
27static struct sdio_func *wl_to_func(struct wl1251 *wl)
28{
29 struct wl1251_sdio *wl_sdio = wl->if_priv;
30 return wl_sdio->func;
31}
32
33static void wl1251_sdio_interrupt(struct sdio_func *func)
34{
35 struct wl1251 *wl = sdio_get_drvdata(func);
36
37 wl1251_debug(DEBUG_IRQ, "IRQ");
38
39 /* FIXME should be synchronous for sdio */
40 ieee80211_queue_work(wl->hw, &wl->irq_work);
41}
42
43static const struct sdio_device_id wl1251_devices[] = {
44 { SDIO_DEVICE(SDIO_VENDOR_ID_TI_WL1251, SDIO_DEVICE_ID_TI_WL1251) },
45 {}
46};
47MODULE_DEVICE_TABLE(sdio, wl1251_devices);
48
49
50static void wl1251_sdio_read(struct wl1251 *wl, int addr,
51 void *buf, size_t len)
52{
53 int ret;
54 struct sdio_func *func = wl_to_func(wl);
55
56 sdio_claim_host(func);
57 ret = sdio_memcpy_fromio(func, buf, addr, len);
58 if (ret)
59 wl1251_error("sdio read failed (%d)", ret);
60 sdio_release_host(func);
61}
62
63static void wl1251_sdio_write(struct wl1251 *wl, int addr,
64 void *buf, size_t len)
65{
66 int ret;
67 struct sdio_func *func = wl_to_func(wl);
68
69 sdio_claim_host(func);
70 ret = sdio_memcpy_toio(func, addr, buf, len);
71 if (ret)
72 wl1251_error("sdio write failed (%d)", ret);
73 sdio_release_host(func);
74}
75
76static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val)
77{
78 int ret = 0;
79 struct wl1251_sdio *wl_sdio = wl->if_priv;
80 struct sdio_func *func = wl_sdio->func;
81
82 /*
83 * The hardware only supports RAW (read after write) access for
84 * reading, regular sdio_readb won't work here (it interprets
85 * the unused bits of CMD52 as write data even if we send read
86 * request).
87 */
88 sdio_claim_host(func);
89 *val = sdio_writeb_readb(func, wl_sdio->elp_val, addr, &ret);
90 sdio_release_host(func);
91
92 if (ret)
93 wl1251_error("sdio_readb failed (%d)", ret);
94}
95
96static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val)
97{
98 int ret = 0;
99 struct wl1251_sdio *wl_sdio = wl->if_priv;
100 struct sdio_func *func = wl_sdio->func;
101
102 sdio_claim_host(func);
103 sdio_writeb(func, val, addr, &ret);
104 sdio_release_host(func);
105
106 if (ret)
107 wl1251_error("sdio_writeb failed (%d)", ret);
108 else
109 wl_sdio->elp_val = val;
110}
111
112static void wl1251_sdio_reset(struct wl1251 *wl)
113{
114}
115
116static void wl1251_sdio_enable_irq(struct wl1251 *wl)
117{
118 struct sdio_func *func = wl_to_func(wl);
119
120 sdio_claim_host(func);
121 sdio_claim_irq(func, wl1251_sdio_interrupt);
122 sdio_release_host(func);
123}
124
125static void wl1251_sdio_disable_irq(struct wl1251 *wl)
126{
127 struct sdio_func *func = wl_to_func(wl);
128
129 sdio_claim_host(func);
130 sdio_release_irq(func);
131 sdio_release_host(func);
132}
133
134/* Interrupts when using dedicated WLAN_IRQ pin */
135static irqreturn_t wl1251_line_irq(int irq, void *cookie)
136{
137 struct wl1251 *wl = cookie;
138
139 ieee80211_queue_work(wl->hw, &wl->irq_work);
140
141 return IRQ_HANDLED;
142}
143
144static void wl1251_enable_line_irq(struct wl1251 *wl)
145{
146 return enable_irq(wl->irq);
147}
148
149static void wl1251_disable_line_irq(struct wl1251 *wl)
150{
151 return disable_irq(wl->irq);
152}
153
154static int wl1251_sdio_set_power(struct wl1251 *wl, bool enable)
155{
156 struct sdio_func *func = wl_to_func(wl);
157 int ret;
158
159 if (enable) {
160 ret = pm_runtime_get_sync(&func->dev);
161 if (ret < 0) {
162 pm_runtime_put_sync(&func->dev);
163 goto out;
164 }
165
166 sdio_claim_host(func);
167 sdio_enable_func(func);
168 sdio_release_host(func);
169 } else {
170 sdio_claim_host(func);
171 sdio_disable_func(func);
172 sdio_release_host(func);
173
174 ret = pm_runtime_put_sync(&func->dev);
175 if (ret < 0)
176 goto out;
177 }
178
179out:
180 return ret;
181}
182
183static struct wl1251_if_operations wl1251_sdio_ops = {
184 .read = wl1251_sdio_read,
185 .write = wl1251_sdio_write,
186 .write_elp = wl1251_sdio_write_elp,
187 .read_elp = wl1251_sdio_read_elp,
188 .reset = wl1251_sdio_reset,
189 .power = wl1251_sdio_set_power,
190};
191
192static int wl1251_sdio_probe(struct sdio_func *func,
193 const struct sdio_device_id *id)
194{
195 int ret;
196 struct wl1251 *wl;
197 struct ieee80211_hw *hw;
198 struct wl1251_sdio *wl_sdio;
199 struct device_node *np = func->dev.of_node;
200
201 hw = wl1251_alloc_hw();
202 if (IS_ERR(hw))
203 return PTR_ERR(hw);
204
205 wl = hw->priv;
206
207 wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL);
208 if (wl_sdio == NULL) {
209 ret = -ENOMEM;
210 goto out_free_hw;
211 }
212
213 sdio_claim_host(func);
214 ret = sdio_enable_func(func);
215 if (ret)
216 goto release;
217
218 sdio_set_block_size(func, 512);
219 sdio_release_host(func);
220
221 SET_IEEE80211_DEV(hw, &func->dev);
222 wl_sdio->func = func;
223 wl->if_priv = wl_sdio;
224 wl->if_ops = &wl1251_sdio_ops;
225
226 if (np) {
227 wl->use_eeprom = of_property_read_bool(np, "ti,wl1251-has-eeprom");
228 wl->irq = of_irq_get(np, 0);
229 if (wl->irq == -EPROBE_DEFER) {
230 ret = -EPROBE_DEFER;
231 goto disable;
232 }
233 }
234
235 if (wl->irq) {
236 irq_set_status_flags(wl->irq, IRQ_NOAUTOEN);
237 ret = request_irq(wl->irq, wl1251_line_irq, 0, "wl1251", wl);
238 if (ret < 0) {
239 wl1251_error("request_irq() failed: %d", ret);
240 goto disable;
241 }
242
243 irq_set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
244
245 wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq;
246 wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq;
247
248 wl1251_info("using dedicated interrupt line");
249 } else {
250 wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq;
251 wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq;
252
253 wl1251_info("using SDIO interrupt");
254 }
255
256 ret = wl1251_init_ieee80211(wl);
257 if (ret)
258 goto out_free_irq;
259
260 sdio_set_drvdata(func, wl);
261
262 /* Tell PM core that we don't need the card to be powered now */
263 pm_runtime_put_noidle(&func->dev);
264
265 return ret;
266
267out_free_irq:
268 if (wl->irq)
269 free_irq(wl->irq, wl);
270disable:
271 sdio_claim_host(func);
272 sdio_disable_func(func);
273release:
274 sdio_release_host(func);
275 kfree(wl_sdio);
276out_free_hw:
277 wl1251_free_hw(wl);
278 return ret;
279}
280
281static void wl1251_sdio_remove(struct sdio_func *func)
282{
283 struct wl1251 *wl = sdio_get_drvdata(func);
284 struct wl1251_sdio *wl_sdio = wl->if_priv;
285
286 /* Undo decrement done above in wl1251_probe */
287 pm_runtime_get_noresume(&func->dev);
288
289 if (wl->irq)
290 free_irq(wl->irq, wl);
291 wl1251_free_hw(wl);
292 kfree(wl_sdio);
293
294 sdio_claim_host(func);
295 sdio_release_irq(func);
296 sdio_disable_func(func);
297 sdio_release_host(func);
298}
299
300static int wl1251_suspend(struct device *dev)
301{
302 /*
303 * Tell MMC/SDIO core it's OK to power down the card
304 * (if it isn't already), but not to remove it completely.
305 */
306 return 0;
307}
308
309static int wl1251_resume(struct device *dev)
310{
311 return 0;
312}
313
314static const struct dev_pm_ops wl1251_sdio_pm_ops = {
315 .suspend = wl1251_suspend,
316 .resume = wl1251_resume,
317};
318
319static struct sdio_driver wl1251_sdio_driver = {
320 .name = "wl1251_sdio",
321 .id_table = wl1251_devices,
322 .probe = wl1251_sdio_probe,
323 .remove = wl1251_sdio_remove,
324 .drv.pm = &wl1251_sdio_pm_ops,
325};
326
327static int __init wl1251_sdio_init(void)
328{
329 int err;
330
331 err = sdio_register_driver(&wl1251_sdio_driver);
332 if (err)
333 wl1251_error("failed to register sdio driver: %d", err);
334 return err;
335}
336
337static void __exit wl1251_sdio_exit(void)
338{
339 sdio_unregister_driver(&wl1251_sdio_driver);
340 wl1251_notice("unloaded");
341}
342
343module_init(wl1251_sdio_init);
344module_exit(wl1251_sdio_exit);
345
346MODULE_DESCRIPTION("TI WL1251 SDIO helpers");
347MODULE_LICENSE("GPL");
348MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1/*
2 * wl12xx SDIO routines
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
16 * 02110-1301 USA
17 *
18 * Copyright (C) 2005 Texas Instruments Incorporated
19 * Copyright (C) 2008 Google Inc
20 * Copyright (C) 2009 Bob Copeland (me@bobcopeland.com)
21 */
22#include <linux/interrupt.h>
23#include <linux/module.h>
24#include <linux/mod_devicetable.h>
25#include <linux/mmc/sdio_func.h>
26#include <linux/mmc/sdio_ids.h>
27#include <linux/platform_device.h>
28#include <linux/wl12xx.h>
29#include <linux/irq.h>
30#include <linux/pm_runtime.h>
31#include <linux/gpio.h>
32
33#include "wl1251.h"
34
35#ifndef SDIO_VENDOR_ID_TI
36#define SDIO_VENDOR_ID_TI 0x104c
37#endif
38
39#ifndef SDIO_DEVICE_ID_TI_WL1251
40#define SDIO_DEVICE_ID_TI_WL1251 0x9066
41#endif
42
43struct wl1251_sdio {
44 struct sdio_func *func;
45 u32 elp_val;
46};
47
48static struct sdio_func *wl_to_func(struct wl1251 *wl)
49{
50 struct wl1251_sdio *wl_sdio = wl->if_priv;
51 return wl_sdio->func;
52}
53
54static void wl1251_sdio_interrupt(struct sdio_func *func)
55{
56 struct wl1251 *wl = sdio_get_drvdata(func);
57
58 wl1251_debug(DEBUG_IRQ, "IRQ");
59
60 /* FIXME should be synchronous for sdio */
61 ieee80211_queue_work(wl->hw, &wl->irq_work);
62}
63
64static const struct sdio_device_id wl1251_devices[] = {
65 { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1251) },
66 {}
67};
68MODULE_DEVICE_TABLE(sdio, wl1251_devices);
69
70
71static void wl1251_sdio_read(struct wl1251 *wl, int addr,
72 void *buf, size_t len)
73{
74 int ret;
75 struct sdio_func *func = wl_to_func(wl);
76
77 sdio_claim_host(func);
78 ret = sdio_memcpy_fromio(func, buf, addr, len);
79 if (ret)
80 wl1251_error("sdio read failed (%d)", ret);
81 sdio_release_host(func);
82}
83
84static void wl1251_sdio_write(struct wl1251 *wl, int addr,
85 void *buf, size_t len)
86{
87 int ret;
88 struct sdio_func *func = wl_to_func(wl);
89
90 sdio_claim_host(func);
91 ret = sdio_memcpy_toio(func, addr, buf, len);
92 if (ret)
93 wl1251_error("sdio write failed (%d)", ret);
94 sdio_release_host(func);
95}
96
97static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val)
98{
99 int ret = 0;
100 struct wl1251_sdio *wl_sdio = wl->if_priv;
101 struct sdio_func *func = wl_sdio->func;
102
103 /*
104 * The hardware only supports RAW (read after write) access for
105 * reading, regular sdio_readb won't work here (it interprets
106 * the unused bits of CMD52 as write data even if we send read
107 * request).
108 */
109 sdio_claim_host(func);
110 *val = sdio_writeb_readb(func, wl_sdio->elp_val, addr, &ret);
111 sdio_release_host(func);
112
113 if (ret)
114 wl1251_error("sdio_readb failed (%d)", ret);
115}
116
117static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val)
118{
119 int ret = 0;
120 struct wl1251_sdio *wl_sdio = wl->if_priv;
121 struct sdio_func *func = wl_sdio->func;
122
123 sdio_claim_host(func);
124 sdio_writeb(func, val, addr, &ret);
125 sdio_release_host(func);
126
127 if (ret)
128 wl1251_error("sdio_writeb failed (%d)", ret);
129 else
130 wl_sdio->elp_val = val;
131}
132
133static void wl1251_sdio_reset(struct wl1251 *wl)
134{
135}
136
137static void wl1251_sdio_enable_irq(struct wl1251 *wl)
138{
139 struct sdio_func *func = wl_to_func(wl);
140
141 sdio_claim_host(func);
142 sdio_claim_irq(func, wl1251_sdio_interrupt);
143 sdio_release_host(func);
144}
145
146static void wl1251_sdio_disable_irq(struct wl1251 *wl)
147{
148 struct sdio_func *func = wl_to_func(wl);
149
150 sdio_claim_host(func);
151 sdio_release_irq(func);
152 sdio_release_host(func);
153}
154
155/* Interrupts when using dedicated WLAN_IRQ pin */
156static irqreturn_t wl1251_line_irq(int irq, void *cookie)
157{
158 struct wl1251 *wl = cookie;
159
160 ieee80211_queue_work(wl->hw, &wl->irq_work);
161
162 return IRQ_HANDLED;
163}
164
165static void wl1251_enable_line_irq(struct wl1251 *wl)
166{
167 return enable_irq(wl->irq);
168}
169
170static void wl1251_disable_line_irq(struct wl1251 *wl)
171{
172 return disable_irq(wl->irq);
173}
174
175static int wl1251_sdio_set_power(struct wl1251 *wl, bool enable)
176{
177 struct sdio_func *func = wl_to_func(wl);
178 int ret;
179
180 if (enable) {
181 /*
182 * Power is controlled by runtime PM, but we still call board
183 * callback in case it wants to do any additional setup,
184 * for example enabling clock buffer for the module.
185 */
186 if (gpio_is_valid(wl->power_gpio))
187 gpio_set_value(wl->power_gpio, true);
188
189
190 ret = pm_runtime_get_sync(&func->dev);
191 if (ret < 0) {
192 pm_runtime_put_sync(&func->dev);
193 goto out;
194 }
195
196 sdio_claim_host(func);
197 sdio_enable_func(func);
198 sdio_release_host(func);
199 } else {
200 sdio_claim_host(func);
201 sdio_disable_func(func);
202 sdio_release_host(func);
203
204 ret = pm_runtime_put_sync(&func->dev);
205 if (ret < 0)
206 goto out;
207
208 if (gpio_is_valid(wl->power_gpio))
209 gpio_set_value(wl->power_gpio, false);
210 }
211
212out:
213 return ret;
214}
215
216static struct wl1251_if_operations wl1251_sdio_ops = {
217 .read = wl1251_sdio_read,
218 .write = wl1251_sdio_write,
219 .write_elp = wl1251_sdio_write_elp,
220 .read_elp = wl1251_sdio_read_elp,
221 .reset = wl1251_sdio_reset,
222 .power = wl1251_sdio_set_power,
223};
224
225static int wl1251_sdio_probe(struct sdio_func *func,
226 const struct sdio_device_id *id)
227{
228 int ret;
229 struct wl1251 *wl;
230 struct ieee80211_hw *hw;
231 struct wl1251_sdio *wl_sdio;
232 const struct wl1251_platform_data *wl1251_board_data;
233
234 hw = wl1251_alloc_hw();
235 if (IS_ERR(hw))
236 return PTR_ERR(hw);
237
238 wl = hw->priv;
239
240 wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL);
241 if (wl_sdio == NULL) {
242 ret = -ENOMEM;
243 goto out_free_hw;
244 }
245
246 sdio_claim_host(func);
247 ret = sdio_enable_func(func);
248 if (ret)
249 goto release;
250
251 sdio_set_block_size(func, 512);
252 sdio_release_host(func);
253
254 SET_IEEE80211_DEV(hw, &func->dev);
255 wl_sdio->func = func;
256 wl->if_priv = wl_sdio;
257 wl->if_ops = &wl1251_sdio_ops;
258
259 wl1251_board_data = wl1251_get_platform_data();
260 if (!IS_ERR(wl1251_board_data)) {
261 wl->power_gpio = wl1251_board_data->power_gpio;
262 wl->irq = wl1251_board_data->irq;
263 wl->use_eeprom = wl1251_board_data->use_eeprom;
264 }
265
266 if (gpio_is_valid(wl->power_gpio)) {
267 ret = devm_gpio_request(&func->dev, wl->power_gpio,
268 "wl1251 power");
269 if (ret) {
270 wl1251_error("Failed to request gpio: %d\n", ret);
271 goto disable;
272 }
273 }
274
275 if (wl->irq) {
276 irq_set_status_flags(wl->irq, IRQ_NOAUTOEN);
277 ret = request_irq(wl->irq, wl1251_line_irq, 0, "wl1251", wl);
278 if (ret < 0) {
279 wl1251_error("request_irq() failed: %d", ret);
280 goto disable;
281 }
282
283 irq_set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
284
285 wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq;
286 wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq;
287
288 wl1251_info("using dedicated interrupt line");
289 } else {
290 wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq;
291 wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq;
292
293 wl1251_info("using SDIO interrupt");
294 }
295
296 ret = wl1251_init_ieee80211(wl);
297 if (ret)
298 goto out_free_irq;
299
300 sdio_set_drvdata(func, wl);
301
302 /* Tell PM core that we don't need the card to be powered now */
303 pm_runtime_put_noidle(&func->dev);
304
305 return ret;
306
307out_free_irq:
308 if (wl->irq)
309 free_irq(wl->irq, wl);
310disable:
311 sdio_claim_host(func);
312 sdio_disable_func(func);
313release:
314 sdio_release_host(func);
315 kfree(wl_sdio);
316out_free_hw:
317 wl1251_free_hw(wl);
318 return ret;
319}
320
321static void wl1251_sdio_remove(struct sdio_func *func)
322{
323 struct wl1251 *wl = sdio_get_drvdata(func);
324 struct wl1251_sdio *wl_sdio = wl->if_priv;
325
326 /* Undo decrement done above in wl1251_probe */
327 pm_runtime_get_noresume(&func->dev);
328
329 if (wl->irq)
330 free_irq(wl->irq, wl);
331 wl1251_free_hw(wl);
332 kfree(wl_sdio);
333
334 sdio_claim_host(func);
335 sdio_release_irq(func);
336 sdio_disable_func(func);
337 sdio_release_host(func);
338}
339
340static int wl1251_suspend(struct device *dev)
341{
342 /*
343 * Tell MMC/SDIO core it's OK to power down the card
344 * (if it isn't already), but not to remove it completely.
345 */
346 return 0;
347}
348
349static int wl1251_resume(struct device *dev)
350{
351 return 0;
352}
353
354static const struct dev_pm_ops wl1251_sdio_pm_ops = {
355 .suspend = wl1251_suspend,
356 .resume = wl1251_resume,
357};
358
359static struct sdio_driver wl1251_sdio_driver = {
360 .name = "wl1251_sdio",
361 .id_table = wl1251_devices,
362 .probe = wl1251_sdio_probe,
363 .remove = wl1251_sdio_remove,
364 .drv.pm = &wl1251_sdio_pm_ops,
365};
366
367static int __init wl1251_sdio_init(void)
368{
369 int err;
370
371 err = sdio_register_driver(&wl1251_sdio_driver);
372 if (err)
373 wl1251_error("failed to register sdio driver: %d", err);
374 return err;
375}
376
377static void __exit wl1251_sdio_exit(void)
378{
379 sdio_unregister_driver(&wl1251_sdio_driver);
380 wl1251_notice("unloaded");
381}
382
383module_init(wl1251_sdio_init);
384module_exit(wl1251_sdio_exit);
385
386MODULE_LICENSE("GPL");
387MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");