2 * wm8350-core.c -- Device access for Wolfson WM8350
4 * Copyright 2007, 2008 Wolfson Microelectronics PLC.
6 * Author: Liam Girdwood, Mark Brown
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/slab.h>
19 #include <linux/bug.h>
20 #include <linux/device.h>
21 #include <linux/delay.h>
22 #include <linux/interrupt.h>
23 #include <linux/regmap.h>
24 #include <linux/workqueue.h>
26 #include <linux/mfd/wm8350/core.h>
27 #include <linux/mfd/wm8350/audio.h>
28 #include <linux/mfd/wm8350/comparator.h>
29 #include <linux/mfd/wm8350/gpio.h>
30 #include <linux/mfd/wm8350/pmic.h>
31 #include <linux/mfd/wm8350/rtc.h>
32 #include <linux/mfd/wm8350/supply.h>
33 #include <linux/mfd/wm8350/wdt.h>
35 #define WM8350_CLOCK_CONTROL_1 0x28
36 #define WM8350_AIF_TEST 0x74
39 #define WM8350_BUS_DEBUG 0
41 #define dump(regs, src) do { \
45 for (i_ = 0; i_ < regs; i_++) \
46 printk(" 0x%4.4x", *src_++); \
50 #define dump(bytes, src)
53 #define WM8350_LOCK_DEBUG 0
55 #define ldbg(format, arg...) printk(format, ## arg)
57 #define ldbg(format, arg...)
63 static DEFINE_MUTEX(reg_lock_mutex);
66 * Safe read, modify, write methods
68 int wm8350_clear_bits(struct wm8350 *wm8350, u16 reg, u16 mask)
70 return regmap_update_bits(wm8350->regmap, reg, mask, 0);
72 EXPORT_SYMBOL_GPL(wm8350_clear_bits);
74 int wm8350_set_bits(struct wm8350 *wm8350, u16 reg, u16 mask)
76 return regmap_update_bits(wm8350->regmap, reg, mask, mask);
78 EXPORT_SYMBOL_GPL(wm8350_set_bits);
80 u16 wm8350_reg_read(struct wm8350 *wm8350, int reg)
85 err = regmap_read(wm8350->regmap, reg, &data);
87 dev_err(wm8350->dev, "read from reg R%d failed\n", reg);
91 EXPORT_SYMBOL_GPL(wm8350_reg_read);
93 int wm8350_reg_write(struct wm8350 *wm8350, int reg, u16 val)
97 ret = regmap_write(wm8350->regmap, reg, val);
100 dev_err(wm8350->dev, "write to reg R%d failed\n", reg);
103 EXPORT_SYMBOL_GPL(wm8350_reg_write);
105 int wm8350_block_read(struct wm8350 *wm8350, int start_reg, int regs,
110 err = regmap_bulk_read(wm8350->regmap, start_reg, dest, regs);
112 dev_err(wm8350->dev, "block read starting from R%d failed\n",
117 EXPORT_SYMBOL_GPL(wm8350_block_read);
119 int wm8350_block_write(struct wm8350 *wm8350, int start_reg, int regs,
124 ret = regmap_bulk_write(wm8350->regmap, start_reg, src, regs);
126 dev_err(wm8350->dev, "block write starting at R%d failed\n",
131 EXPORT_SYMBOL_GPL(wm8350_block_write);
136 * The WM8350 has a hardware lock which can be used to prevent writes to
137 * some registers (generally those which can cause particularly serious
138 * problems if misused). This function enables that lock.
140 int wm8350_reg_lock(struct wm8350 *wm8350)
144 mutex_lock(®_lock_mutex);
148 ret = wm8350_reg_write(wm8350, WM8350_SECURITY, WM8350_LOCK_KEY);
150 dev_err(wm8350->dev, "lock failed\n");
152 wm8350->unlocked = false;
154 mutex_unlock(®_lock_mutex);
158 EXPORT_SYMBOL_GPL(wm8350_reg_lock);
161 * wm8350_reg_unlock()
163 * The WM8350 has a hardware lock which can be used to prevent writes to
164 * some registers (generally those which can cause particularly serious
165 * problems if misused). This function disables that lock so updates
166 * can be performed. For maximum safety this should be done only when
169 int wm8350_reg_unlock(struct wm8350 *wm8350)
173 mutex_lock(®_lock_mutex);
177 ret = wm8350_reg_write(wm8350, WM8350_SECURITY, WM8350_UNLOCK_KEY);
179 dev_err(wm8350->dev, "unlock failed\n");
181 wm8350->unlocked = true;
183 mutex_unlock(®_lock_mutex);
187 EXPORT_SYMBOL_GPL(wm8350_reg_unlock);
189 int wm8350_read_auxadc(struct wm8350 *wm8350, int channel, int scale, int vref)
193 if (channel < WM8350_AUXADC_AUX1 || channel > WM8350_AUXADC_TEMP)
195 if (channel >= WM8350_AUXADC_USB && channel <= WM8350_AUXADC_TEMP
196 && (scale != 0 || vref != 0))
199 mutex_lock(&wm8350->auxadc_mutex);
201 /* Turn on the ADC */
202 reg = wm8350_reg_read(wm8350, WM8350_POWER_MGMT_5);
203 wm8350_reg_write(wm8350, WM8350_POWER_MGMT_5, reg | WM8350_AUXADC_ENA);
208 wm8350_reg_write(wm8350, WM8350_AUX1_READBACK + channel, reg);
211 reg = wm8350_reg_read(wm8350, WM8350_DIGITISER_CONTROL_1);
212 reg |= 1 << channel | WM8350_AUXADC_POLL;
213 wm8350_reg_write(wm8350, WM8350_DIGITISER_CONTROL_1, reg);
215 /* If a late IRQ left the completion signalled then consume
217 try_wait_for_completion(&wm8350->auxadc_done);
219 /* We ignore the result of the completion and just check for a
220 * conversion result, allowing us to soldier on if the IRQ
221 * infrastructure is not set up for the chip. */
222 wait_for_completion_timeout(&wm8350->auxadc_done, msecs_to_jiffies(5));
224 reg = wm8350_reg_read(wm8350, WM8350_DIGITISER_CONTROL_1);
225 if (reg & WM8350_AUXADC_POLL)
226 dev_err(wm8350->dev, "adc chn %d read timeout\n", channel);
228 result = wm8350_reg_read(wm8350,
229 WM8350_AUX1_READBACK + channel);
231 /* Turn off the ADC */
232 reg = wm8350_reg_read(wm8350, WM8350_POWER_MGMT_5);
233 wm8350_reg_write(wm8350, WM8350_POWER_MGMT_5,
234 reg & ~WM8350_AUXADC_ENA);
236 mutex_unlock(&wm8350->auxadc_mutex);
238 return result & WM8350_AUXADC_DATA1_MASK;
240 EXPORT_SYMBOL_GPL(wm8350_read_auxadc);
242 static irqreturn_t wm8350_auxadc_irq(int irq, void *irq_data)
244 struct wm8350 *wm8350 = irq_data;
246 complete(&wm8350->auxadc_done);
252 * Register a client device. This is non-fatal since there is no need to
253 * fail the entire device init due to a single platform device failing.
255 static void wm8350_client_dev_register(struct wm8350 *wm8350,
257 struct platform_device **pdev)
261 *pdev = platform_device_alloc(name, -1);
263 dev_err(wm8350->dev, "Failed to allocate %s\n", name);
267 (*pdev)->dev.parent = wm8350->dev;
268 platform_set_drvdata(*pdev, wm8350);
269 ret = platform_device_add(*pdev);
271 dev_err(wm8350->dev, "Failed to register %s: %d\n", name, ret);
272 platform_device_put(*pdev);
277 int wm8350_device_init(struct wm8350 *wm8350, int irq,
278 struct wm8350_platform_data *pdata)
281 unsigned int id1, id2, mask_rev;
282 unsigned int cust_id, mode, chip_rev;
284 dev_set_drvdata(wm8350->dev, wm8350);
286 /* get WM8350 revision and config mode */
287 ret = regmap_read(wm8350->regmap, WM8350_RESET_ID, &id1);
289 dev_err(wm8350->dev, "Failed to read ID: %d\n", ret);
293 ret = regmap_read(wm8350->regmap, WM8350_ID, &id2);
295 dev_err(wm8350->dev, "Failed to read ID: %d\n", ret);
299 ret = regmap_read(wm8350->regmap, WM8350_REVISION, &mask_rev);
301 dev_err(wm8350->dev, "Failed to read revision: %d\n", ret);
307 "Device with ID %x is not a WM8350\n", id1);
312 mode = id2 & WM8350_CONF_STS_MASK >> 10;
313 cust_id = id2 & WM8350_CUST_ID_MASK;
314 chip_rev = (id2 & WM8350_CHIP_REV_MASK) >> 12;
315 dev_info(wm8350->dev,
316 "CONF_STS %d, CUST_ID %d, MASK_REV %d, CHIP_REV %d\n",
317 mode, cust_id, mask_rev, chip_rev);
320 dev_err(wm8350->dev, "Unsupported CUST_ID\n");
327 wm8350->pmic.max_dcdc = WM8350_DCDC_6;
328 wm8350->pmic.max_isink = WM8350_ISINK_B;
332 dev_info(wm8350->dev, "WM8350 Rev E\n");
335 dev_info(wm8350->dev, "WM8350 Rev F\n");
338 dev_info(wm8350->dev, "WM8350 Rev G\n");
339 wm8350->power.rev_g_coeff = 1;
342 dev_info(wm8350->dev, "WM8350 Rev H\n");
343 wm8350->power.rev_g_coeff = 1;
346 /* For safety we refuse to run on unknown hardware */
347 dev_err(wm8350->dev, "Unknown WM8350 CHIP_REV\n");
354 wm8350->pmic.max_dcdc = WM8350_DCDC_4;
355 wm8350->pmic.max_isink = WM8350_ISINK_A;
359 dev_info(wm8350->dev, "WM8351 Rev A\n");
360 wm8350->power.rev_g_coeff = 1;
364 dev_info(wm8350->dev, "WM8351 Rev B\n");
365 wm8350->power.rev_g_coeff = 1;
369 dev_err(wm8350->dev, "Unknown WM8351 CHIP_REV\n");
376 wm8350->pmic.max_dcdc = WM8350_DCDC_6;
377 wm8350->pmic.max_isink = WM8350_ISINK_B;
381 dev_info(wm8350->dev, "WM8352 Rev A\n");
382 wm8350->power.rev_g_coeff = 1;
386 dev_err(wm8350->dev, "Unknown WM8352 CHIP_REV\n");
393 dev_err(wm8350->dev, "Unknown MASK_REV\n");
398 mutex_init(&wm8350->auxadc_mutex);
399 init_completion(&wm8350->auxadc_done);
401 ret = wm8350_irq_init(wm8350, irq, pdata);
405 if (wm8350->irq_base) {
406 ret = request_threaded_irq(wm8350->irq_base +
407 WM8350_IRQ_AUXADC_DATARDY,
408 NULL, wm8350_auxadc_irq, 0,
411 dev_warn(wm8350->dev,
412 "Failed to request AUXADC IRQ: %d\n", ret);
415 if (pdata && pdata->init) {
416 ret = pdata->init(wm8350);
418 dev_err(wm8350->dev, "Platform init() failed: %d\n",
424 wm8350_reg_write(wm8350, WM8350_SYSTEM_INTERRUPTS_MASK, 0x0);
426 wm8350_client_dev_register(wm8350, "wm8350-codec",
427 &(wm8350->codec.pdev));
428 wm8350_client_dev_register(wm8350, "wm8350-gpio",
429 &(wm8350->gpio.pdev));
430 wm8350_client_dev_register(wm8350, "wm8350-hwmon",
431 &(wm8350->hwmon.pdev));
432 wm8350_client_dev_register(wm8350, "wm8350-power",
433 &(wm8350->power.pdev));
434 wm8350_client_dev_register(wm8350, "wm8350-rtc", &(wm8350->rtc.pdev));
435 wm8350_client_dev_register(wm8350, "wm8350-wdt", &(wm8350->wdt.pdev));
440 wm8350_irq_exit(wm8350);
444 EXPORT_SYMBOL_GPL(wm8350_device_init);
446 void wm8350_device_exit(struct wm8350 *wm8350)
450 for (i = 0; i < ARRAY_SIZE(wm8350->pmic.led); i++)
451 platform_device_unregister(wm8350->pmic.led[i].pdev);
453 for (i = 0; i < ARRAY_SIZE(wm8350->pmic.pdev); i++)
454 platform_device_unregister(wm8350->pmic.pdev[i]);
456 platform_device_unregister(wm8350->wdt.pdev);
457 platform_device_unregister(wm8350->rtc.pdev);
458 platform_device_unregister(wm8350->power.pdev);
459 platform_device_unregister(wm8350->hwmon.pdev);
460 platform_device_unregister(wm8350->gpio.pdev);
461 platform_device_unregister(wm8350->codec.pdev);
463 if (wm8350->irq_base)
464 free_irq(wm8350->irq_base + WM8350_IRQ_AUXADC_DATARDY, wm8350);
466 wm8350_irq_exit(wm8350);
468 EXPORT_SYMBOL_GPL(wm8350_device_exit);
470 MODULE_DESCRIPTION("WM8350 AudioPlus PMIC core driver");
471 MODULE_LICENSE("GPL");