1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * This file is part of wl1271
4 *
5 * Copyright (C) 2009-2010 Nokia Corporation
6 *
7 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
8 */
9
10 #include <linux/irq.h>
11 #include <linux/module.h>
12 #include <linux/vmalloc.h>
13 #include <linux/platform_device.h>
14 #include <linux/mmc/sdio.h>
15 #include <linux/mmc/sdio_func.h>
16 #include <linux/mmc/sdio_ids.h>
17 #include <linux/mmc/card.h>
18 #include <linux/mmc/host.h>
19 #include <linux/pm_runtime.h>
20 #include <linux/printk.h>
21 #include <linux/of.h>
22 #include <linux/of_irq.h>
23
24 #include "wlcore.h"
25 #include "wl12xx_80211.h"
26 #include "io.h"
27
28 static bool dump;
29
30 struct wl12xx_sdio_glue {
31 struct device *dev;
32 struct platform_device *core;
33 };
34
35 static const struct sdio_device_id wl1271_devices[] = {
36 { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
37 {}
38 };
39 MODULE_DEVICE_TABLE(sdio, wl1271_devices);
40
wl1271_sdio_set_block_size(struct device * child,unsigned int blksz)41 static void wl1271_sdio_set_block_size(struct device *child,
42 unsigned int blksz)
43 {
44 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
45 struct sdio_func *func = dev_to_sdio_func(glue->dev);
46
47 sdio_claim_host(func);
48 sdio_set_block_size(func, blksz);
49 sdio_release_host(func);
50 }
51
wl12xx_sdio_raw_read(struct device * child,int addr,void * buf,size_t len,bool fixed)52 static int __must_check wl12xx_sdio_raw_read(struct device *child, int addr,
53 void *buf, size_t len, bool fixed)
54 {
55 int ret;
56 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
57 struct sdio_func *func = dev_to_sdio_func(glue->dev);
58
59 sdio_claim_host(func);
60
61 if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
62 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
63 dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n",
64 addr, ((u8 *)buf)[0]);
65 } else {
66 if (fixed)
67 ret = sdio_readsb(func, buf, addr, len);
68 else
69 ret = sdio_memcpy_fromio(func, buf, addr, len);
70
71 dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n",
72 addr, len);
73 }
74
75 sdio_release_host(func);
76
77 if (ret)
78 dev_err_ratelimited(child->parent, "sdio read failed (%d)\n", ret);
79
80 if (unlikely(dump)) {
81 printk(KERN_DEBUG "wlcore_sdio: READ from 0x%04x\n", addr);
82 print_hex_dump(KERN_DEBUG, "wlcore_sdio: READ ",
83 DUMP_PREFIX_OFFSET, 16, 1,
84 buf, len, false);
85 }
86
87 return ret;
88 }
89
wl12xx_sdio_raw_write(struct device * child,int addr,void * buf,size_t len,bool fixed)90 static int __must_check wl12xx_sdio_raw_write(struct device *child, int addr,
91 void *buf, size_t len, bool fixed)
92 {
93 int ret;
94 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
95 struct sdio_func *func = dev_to_sdio_func(glue->dev);
96
97 sdio_claim_host(func);
98
99 if (unlikely(dump)) {
100 printk(KERN_DEBUG "wlcore_sdio: WRITE to 0x%04x\n", addr);
101 print_hex_dump(KERN_DEBUG, "wlcore_sdio: WRITE ",
102 DUMP_PREFIX_OFFSET, 16, 1,
103 buf, len, false);
104 }
105
106 if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
107 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
108 dev_dbg(child->parent, "sdio write 52 addr 0x%x, byte 0x%02x\n",
109 addr, ((u8 *)buf)[0]);
110 } else {
111 dev_dbg(child->parent, "sdio write 53 addr 0x%x, %zu bytes\n",
112 addr, len);
113
114 if (fixed)
115 ret = sdio_writesb(func, addr, buf, len);
116 else
117 ret = sdio_memcpy_toio(func, addr, buf, len);
118 }
119
120 sdio_release_host(func);
121
122 if (ret)
123 dev_err_ratelimited(child->parent, "sdio write failed (%d)\n", ret);
124
125 return ret;
126 }
127
wl12xx_sdio_power_on(struct wl12xx_sdio_glue * glue)128 static int wl12xx_sdio_power_on(struct wl12xx_sdio_glue *glue)
129 {
130 int ret;
131 struct sdio_func *func = dev_to_sdio_func(glue->dev);
132 struct mmc_card *card = func->card;
133
134 ret = pm_runtime_resume_and_get(&card->dev);
135 if (ret < 0) {
136 dev_err(glue->dev, "%s: failed to get_sync(%d)\n",
137 __func__, ret);
138
139 return ret;
140 }
141
142 sdio_claim_host(func);
143 /*
144 * To guarantee that the SDIO card is power cycled, as required to make
145 * the FW programming to succeed, let's do a brute force HW reset.
146 */
147 mmc_hw_reset(card);
148
149 sdio_enable_func(func);
150 sdio_release_host(func);
151
152 return 0;
153 }
154
wl12xx_sdio_power_off(struct wl12xx_sdio_glue * glue)155 static int wl12xx_sdio_power_off(struct wl12xx_sdio_glue *glue)
156 {
157 struct sdio_func *func = dev_to_sdio_func(glue->dev);
158 struct mmc_card *card = func->card;
159
160 sdio_claim_host(func);
161 sdio_disable_func(func);
162 sdio_release_host(func);
163
164 /* Let runtime PM know the card is powered off */
165 pm_runtime_put(&card->dev);
166 return 0;
167 }
168
wl12xx_sdio_set_power(struct device * child,bool enable)169 static int wl12xx_sdio_set_power(struct device *child, bool enable)
170 {
171 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
172
173 if (enable)
174 return wl12xx_sdio_power_on(glue);
175 else
176 return wl12xx_sdio_power_off(glue);
177 }
178
179 static struct wl1271_if_operations sdio_ops = {
180 .read = wl12xx_sdio_raw_read,
181 .write = wl12xx_sdio_raw_write,
182 .power = wl12xx_sdio_set_power,
183 .set_block_size = wl1271_sdio_set_block_size,
184 };
185
186 #ifdef CONFIG_OF
187
188 static const struct wilink_family_data wl127x_data = {
189 .name = "wl127x",
190 .nvs_name = "ti-connectivity/wl127x-nvs.bin",
191 };
192
193 static const struct wilink_family_data wl128x_data = {
194 .name = "wl128x",
195 .nvs_name = "ti-connectivity/wl128x-nvs.bin",
196 };
197
198 static const struct wilink_family_data wl18xx_data = {
199 .name = "wl18xx",
200 .cfg_name = "ti-connectivity/wl18xx-conf.bin",
201 .nvs_name = "ti-connectivity/wl1271-nvs.bin",
202 };
203
204 static const struct of_device_id wlcore_sdio_of_match_table[] = {
205 { .compatible = "ti,wl1271", .data = &wl127x_data },
206 { .compatible = "ti,wl1273", .data = &wl127x_data },
207 { .compatible = "ti,wl1281", .data = &wl128x_data },
208 { .compatible = "ti,wl1283", .data = &wl128x_data },
209 { .compatible = "ti,wl1285", .data = &wl128x_data },
210 { .compatible = "ti,wl1801", .data = &wl18xx_data },
211 { .compatible = "ti,wl1805", .data = &wl18xx_data },
212 { .compatible = "ti,wl1807", .data = &wl18xx_data },
213 { .compatible = "ti,wl1831", .data = &wl18xx_data },
214 { .compatible = "ti,wl1835", .data = &wl18xx_data },
215 { .compatible = "ti,wl1837", .data = &wl18xx_data },
216 { }
217 };
218
wlcore_probe_of(struct device * dev,int * irq,int * wakeirq,struct wlcore_platdev_data * pdev_data)219 static int wlcore_probe_of(struct device *dev, int *irq, int *wakeirq,
220 struct wlcore_platdev_data *pdev_data)
221 {
222 struct device_node *np = dev->of_node;
223 const struct of_device_id *of_id;
224
225 of_id = of_match_node(wlcore_sdio_of_match_table, np);
226 if (!of_id)
227 return -ENODEV;
228
229 pdev_data->family = of_id->data;
230
231 *irq = irq_of_parse_and_map(np, 0);
232 if (!*irq) {
233 dev_err(dev, "No irq in platform data\n");
234 return -EINVAL;
235 }
236
237 *wakeirq = irq_of_parse_and_map(np, 1);
238
239 /* optional clock frequency params */
240 of_property_read_u32(np, "ref-clock-frequency",
241 &pdev_data->ref_clock_freq);
242 of_property_read_u32(np, "tcxo-clock-frequency",
243 &pdev_data->tcxo_clock_freq);
244
245 return 0;
246 }
247 #else
wlcore_probe_of(struct device * dev,int * irq,int * wakeirq,struct wlcore_platdev_data * pdev_data)248 static int wlcore_probe_of(struct device *dev, int *irq, int *wakeirq,
249 struct wlcore_platdev_data *pdev_data)
250 {
251 return -ENODATA;
252 }
253 #endif
254
wl1271_probe(struct sdio_func * func,const struct sdio_device_id * id)255 static int wl1271_probe(struct sdio_func *func,
256 const struct sdio_device_id *id)
257 {
258 struct wlcore_platdev_data *pdev_data;
259 struct wl12xx_sdio_glue *glue;
260 struct resource res[2];
261 mmc_pm_flag_t mmcflags;
262 int ret = -ENOMEM;
263 int irq, wakeirq, num_irqs;
264 const char *chip_family;
265
266 /* We are only able to handle the wlan function */
267 if (func->num != 0x02)
268 return -ENODEV;
269
270 pdev_data = devm_kzalloc(&func->dev, sizeof(*pdev_data), GFP_KERNEL);
271 if (!pdev_data)
272 return -ENOMEM;
273
274 pdev_data->if_ops = &sdio_ops;
275
276 glue = devm_kzalloc(&func->dev, sizeof(*glue), GFP_KERNEL);
277 if (!glue)
278 return -ENOMEM;
279
280 glue->dev = &func->dev;
281
282 /* Grab access to FN0 for ELP reg. */
283 func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
284
285 /* Use block mode for transferring over one block size of data */
286 func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
287
288 ret = wlcore_probe_of(&func->dev, &irq, &wakeirq, pdev_data);
289 if (ret)
290 goto out;
291
292 /* if sdio can keep power while host is suspended, enable wow */
293 mmcflags = sdio_get_host_pm_caps(func);
294 dev_dbg(glue->dev, "sdio PM caps = 0x%x\n", mmcflags);
295
296 if (mmcflags & MMC_PM_KEEP_POWER)
297 pdev_data->pwr_in_suspend = true;
298
299 sdio_set_drvdata(func, glue);
300
301 /* Tell PM core that we don't need the card to be powered now */
302 pm_runtime_put_noidle(&func->dev);
303
304 /*
305 * Due to a hardware bug, we can't differentiate wl18xx from
306 * wl12xx, because both report the same device ID. The only
307 * way to differentiate is by checking the SDIO revision,
308 * which is 3.00 on the wl18xx chips.
309 */
310 if (func->card->cccr.sdio_vsn == SDIO_SDIO_REV_3_00)
311 chip_family = "wl18xx";
312 else
313 chip_family = "wl12xx";
314
315 glue->core = platform_device_alloc(chip_family, PLATFORM_DEVID_AUTO);
316 if (!glue->core) {
317 dev_err(glue->dev, "can't allocate platform_device");
318 ret = -ENOMEM;
319 goto out;
320 }
321
322 glue->core->dev.parent = &func->dev;
323
324 memset(res, 0x00, sizeof(res));
325
326 res[0].start = irq;
327 res[0].flags = IORESOURCE_IRQ |
328 irqd_get_trigger_type(irq_get_irq_data(irq));
329 res[0].name = "irq";
330
331
332 if (wakeirq > 0) {
333 res[1].start = wakeirq;
334 res[1].flags = IORESOURCE_IRQ |
335 irqd_get_trigger_type(irq_get_irq_data(wakeirq));
336 res[1].name = "wakeirq";
337 num_irqs = 2;
338 } else {
339 num_irqs = 1;
340 }
341 ret = platform_device_add_resources(glue->core, res, num_irqs);
342 if (ret) {
343 dev_err(glue->dev, "can't add resources\n");
344 goto out_dev_put;
345 }
346
347 ret = platform_device_add_data(glue->core, pdev_data,
348 sizeof(*pdev_data));
349 if (ret) {
350 dev_err(glue->dev, "can't add platform data\n");
351 goto out_dev_put;
352 }
353
354 ret = platform_device_add(glue->core);
355 if (ret) {
356 dev_err(glue->dev, "can't add platform device\n");
357 goto out_dev_put;
358 }
359 return 0;
360
361 out_dev_put:
362 platform_device_put(glue->core);
363
364 out:
365 return ret;
366 }
367
wl1271_remove(struct sdio_func * func)368 static void wl1271_remove(struct sdio_func *func)
369 {
370 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
371
372 /* Undo decrement done above in wl1271_probe */
373 pm_runtime_get_noresume(&func->dev);
374
375 platform_device_unregister(glue->core);
376 }
377
378 #ifdef CONFIG_PM
wl1271_suspend(struct device * dev)379 static int wl1271_suspend(struct device *dev)
380 {
381 /* Tell MMC/SDIO core it's OK to power down the card
382 * (if it isn't already), but not to remove it completely */
383 struct sdio_func *func = dev_to_sdio_func(dev);
384 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
385 struct wl1271 *wl = platform_get_drvdata(glue->core);
386 mmc_pm_flag_t sdio_flags;
387 int ret = 0;
388
389 if (!wl) {
390 dev_err(dev, "no wilink module was probed\n");
391 goto out;
392 }
393
394 dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n",
395 wl->wow_enabled);
396
397 /* check whether sdio should keep power */
398 if (wl->wow_enabled) {
399 sdio_flags = sdio_get_host_pm_caps(func);
400
401 if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
402 dev_err(dev, "can't keep power while host "
403 "is suspended\n");
404 ret = -EINVAL;
405 goto out;
406 }
407
408 /* keep power while host suspended */
409 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
410 if (ret) {
411 dev_err(dev, "error while trying to keep power\n");
412 goto out;
413 }
414 }
415 out:
416 return ret;
417 }
418
wl1271_resume(struct device * dev)419 static int wl1271_resume(struct device *dev)
420 {
421 dev_dbg(dev, "wl1271 resume\n");
422
423 return 0;
424 }
425
426 static const struct dev_pm_ops wl1271_sdio_pm_ops = {
427 .suspend = wl1271_suspend,
428 .resume = wl1271_resume,
429 };
430 #endif
431
432 static struct sdio_driver wl1271_sdio_driver = {
433 .name = "wl1271_sdio",
434 .id_table = wl1271_devices,
435 .probe = wl1271_probe,
436 .remove = wl1271_remove,
437 #ifdef CONFIG_PM
438 .drv = {
439 .pm = &wl1271_sdio_pm_ops,
440 },
441 #endif
442 };
443
444 module_sdio_driver(wl1271_sdio_driver);
445
446 module_param(dump, bool, 0600);
447 MODULE_PARM_DESC(dump, "Enable sdio read/write dumps.");
448
449 MODULE_DESCRIPTION("TI WLAN SDIO helpers");
450 MODULE_LICENSE("GPL");
451 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
452 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
453