mirror of https://gitee.com/openkylin/linux.git
445 lines
10 KiB
C
445 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* wm8350-core.c -- Device access for Wolfson WM8350
|
|
*
|
|
* Copyright 2007, 2008 Wolfson Microelectronics PLC.
|
|
*
|
|
* Author: Liam Girdwood, Mark Brown
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/export.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/bug.h>
|
|
#include <linux/device.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
#include <linux/mfd/wm8350/core.h>
|
|
#include <linux/mfd/wm8350/audio.h>
|
|
#include <linux/mfd/wm8350/comparator.h>
|
|
#include <linux/mfd/wm8350/gpio.h>
|
|
#include <linux/mfd/wm8350/pmic.h>
|
|
#include <linux/mfd/wm8350/rtc.h>
|
|
#include <linux/mfd/wm8350/supply.h>
|
|
#include <linux/mfd/wm8350/wdt.h>
|
|
|
|
#define WM8350_CLOCK_CONTROL_1 0x28
|
|
#define WM8350_AIF_TEST 0x74
|
|
|
|
/* debug */
|
|
#define WM8350_BUS_DEBUG 0
|
|
#if WM8350_BUS_DEBUG
|
|
#define dump(regs, src) do { \
|
|
int i_; \
|
|
u16 *src_ = src; \
|
|
printk(KERN_DEBUG); \
|
|
for (i_ = 0; i_ < regs; i_++) \
|
|
printk(" 0x%4.4x", *src_++); \
|
|
printk("\n"); \
|
|
} while (0);
|
|
#else
|
|
#define dump(bytes, src)
|
|
#endif
|
|
|
|
#define WM8350_LOCK_DEBUG 0
|
|
#if WM8350_LOCK_DEBUG
|
|
#define ldbg(format, arg...) printk(format, ## arg)
|
|
#else
|
|
#define ldbg(format, arg...)
|
|
#endif
|
|
|
|
/*
|
|
* WM8350 Device IO
|
|
*/
|
|
static DEFINE_MUTEX(reg_lock_mutex);
|
|
|
|
/*
|
|
* Safe read, modify, write methods
|
|
*/
|
|
int wm8350_clear_bits(struct wm8350 *wm8350, u16 reg, u16 mask)
|
|
{
|
|
return regmap_update_bits(wm8350->regmap, reg, mask, 0);
|
|
}
|
|
EXPORT_SYMBOL_GPL(wm8350_clear_bits);
|
|
|
|
int wm8350_set_bits(struct wm8350 *wm8350, u16 reg, u16 mask)
|
|
{
|
|
return regmap_update_bits(wm8350->regmap, reg, mask, mask);
|
|
}
|
|
EXPORT_SYMBOL_GPL(wm8350_set_bits);
|
|
|
|
u16 wm8350_reg_read(struct wm8350 *wm8350, int reg)
|
|
{
|
|
unsigned int data;
|
|
int err;
|
|
|
|
err = regmap_read(wm8350->regmap, reg, &data);
|
|
if (err)
|
|
dev_err(wm8350->dev, "read from reg R%d failed\n", reg);
|
|
|
|
return data;
|
|
}
|
|
EXPORT_SYMBOL_GPL(wm8350_reg_read);
|
|
|
|
int wm8350_reg_write(struct wm8350 *wm8350, int reg, u16 val)
|
|
{
|
|
int ret;
|
|
|
|
ret = regmap_write(wm8350->regmap, reg, val);
|
|
|
|
if (ret)
|
|
dev_err(wm8350->dev, "write to reg R%d failed\n", reg);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(wm8350_reg_write);
|
|
|
|
int wm8350_block_read(struct wm8350 *wm8350, int start_reg, int regs,
|
|
u16 *dest)
|
|
{
|
|
int err = 0;
|
|
|
|
err = regmap_bulk_read(wm8350->regmap, start_reg, dest, regs);
|
|
if (err)
|
|
dev_err(wm8350->dev, "block read starting from R%d failed\n",
|
|
start_reg);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(wm8350_block_read);
|
|
|
|
int wm8350_block_write(struct wm8350 *wm8350, int start_reg, int regs,
|
|
u16 *src)
|
|
{
|
|
int ret = 0;
|
|
|
|
ret = regmap_bulk_write(wm8350->regmap, start_reg, src, regs);
|
|
if (ret)
|
|
dev_err(wm8350->dev, "block write starting at R%d failed\n",
|
|
start_reg);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(wm8350_block_write);
|
|
|
|
/**
|
|
* wm8350_reg_lock()
|
|
*
|
|
* The WM8350 has a hardware lock which can be used to prevent writes to
|
|
* some registers (generally those which can cause particularly serious
|
|
* problems if misused). This function enables that lock.
|
|
*
|
|
* @wm8350: pointer to local driver data structure
|
|
*/
|
|
int wm8350_reg_lock(struct wm8350 *wm8350)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(®_lock_mutex);
|
|
|
|
ldbg(__func__);
|
|
|
|
ret = wm8350_reg_write(wm8350, WM8350_SECURITY, WM8350_LOCK_KEY);
|
|
if (ret)
|
|
dev_err(wm8350->dev, "lock failed\n");
|
|
|
|
wm8350->unlocked = false;
|
|
|
|
mutex_unlock(®_lock_mutex);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(wm8350_reg_lock);
|
|
|
|
/**
|
|
* wm8350_reg_unlock()
|
|
*
|
|
* The WM8350 has a hardware lock which can be used to prevent writes to
|
|
* some registers (generally those which can cause particularly serious
|
|
* problems if misused). This function disables that lock so updates
|
|
* can be performed. For maximum safety this should be done only when
|
|
* required.
|
|
*
|
|
* @wm8350: pointer to local driver data structure
|
|
*/
|
|
int wm8350_reg_unlock(struct wm8350 *wm8350)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(®_lock_mutex);
|
|
|
|
ldbg(__func__);
|
|
|
|
ret = wm8350_reg_write(wm8350, WM8350_SECURITY, WM8350_UNLOCK_KEY);
|
|
if (ret)
|
|
dev_err(wm8350->dev, "unlock failed\n");
|
|
|
|
wm8350->unlocked = true;
|
|
|
|
mutex_unlock(®_lock_mutex);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(wm8350_reg_unlock);
|
|
|
|
int wm8350_read_auxadc(struct wm8350 *wm8350, int channel, int scale, int vref)
|
|
{
|
|
u16 reg, result = 0;
|
|
|
|
if (channel < WM8350_AUXADC_AUX1 || channel > WM8350_AUXADC_TEMP)
|
|
return -EINVAL;
|
|
if (channel >= WM8350_AUXADC_USB && channel <= WM8350_AUXADC_TEMP
|
|
&& (scale != 0 || vref != 0))
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&wm8350->auxadc_mutex);
|
|
|
|
/* Turn on the ADC */
|
|
reg = wm8350_reg_read(wm8350, WM8350_POWER_MGMT_5);
|
|
wm8350_reg_write(wm8350, WM8350_POWER_MGMT_5, reg | WM8350_AUXADC_ENA);
|
|
|
|
if (scale || vref) {
|
|
reg = scale << 13;
|
|
reg |= vref << 12;
|
|
wm8350_reg_write(wm8350, WM8350_AUX1_READBACK + channel, reg);
|
|
}
|
|
|
|
reg = wm8350_reg_read(wm8350, WM8350_DIGITISER_CONTROL_1);
|
|
reg |= 1 << channel | WM8350_AUXADC_POLL;
|
|
wm8350_reg_write(wm8350, WM8350_DIGITISER_CONTROL_1, reg);
|
|
|
|
/* If a late IRQ left the completion signalled then consume
|
|
* the completion. */
|
|
try_wait_for_completion(&wm8350->auxadc_done);
|
|
|
|
/* We ignore the result of the completion and just check for a
|
|
* conversion result, allowing us to soldier on if the IRQ
|
|
* infrastructure is not set up for the chip. */
|
|
wait_for_completion_timeout(&wm8350->auxadc_done, msecs_to_jiffies(5));
|
|
|
|
reg = wm8350_reg_read(wm8350, WM8350_DIGITISER_CONTROL_1);
|
|
if (reg & WM8350_AUXADC_POLL)
|
|
dev_err(wm8350->dev, "adc chn %d read timeout\n", channel);
|
|
else
|
|
result = wm8350_reg_read(wm8350,
|
|
WM8350_AUX1_READBACK + channel);
|
|
|
|
/* Turn off the ADC */
|
|
reg = wm8350_reg_read(wm8350, WM8350_POWER_MGMT_5);
|
|
wm8350_reg_write(wm8350, WM8350_POWER_MGMT_5,
|
|
reg & ~WM8350_AUXADC_ENA);
|
|
|
|
mutex_unlock(&wm8350->auxadc_mutex);
|
|
|
|
return result & WM8350_AUXADC_DATA1_MASK;
|
|
}
|
|
EXPORT_SYMBOL_GPL(wm8350_read_auxadc);
|
|
|
|
static irqreturn_t wm8350_auxadc_irq(int irq, void *irq_data)
|
|
{
|
|
struct wm8350 *wm8350 = irq_data;
|
|
|
|
complete(&wm8350->auxadc_done);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*
|
|
* Register a client device. This is non-fatal since there is no need to
|
|
* fail the entire device init due to a single platform device failing.
|
|
*/
|
|
static void wm8350_client_dev_register(struct wm8350 *wm8350,
|
|
const char *name,
|
|
struct platform_device **pdev)
|
|
{
|
|
int ret;
|
|
|
|
*pdev = platform_device_alloc(name, -1);
|
|
if (*pdev == NULL) {
|
|
dev_err(wm8350->dev, "Failed to allocate %s\n", name);
|
|
return;
|
|
}
|
|
|
|
(*pdev)->dev.parent = wm8350->dev;
|
|
platform_set_drvdata(*pdev, wm8350);
|
|
ret = platform_device_add(*pdev);
|
|
if (ret != 0) {
|
|
dev_err(wm8350->dev, "Failed to register %s: %d\n", name, ret);
|
|
platform_device_put(*pdev);
|
|
*pdev = NULL;
|
|
}
|
|
}
|
|
|
|
int wm8350_device_init(struct wm8350 *wm8350, int irq,
|
|
struct wm8350_platform_data *pdata)
|
|
{
|
|
int ret;
|
|
unsigned int id1, id2, mask_rev;
|
|
unsigned int cust_id, mode, chip_rev;
|
|
|
|
dev_set_drvdata(wm8350->dev, wm8350);
|
|
|
|
/* get WM8350 revision and config mode */
|
|
ret = regmap_read(wm8350->regmap, WM8350_RESET_ID, &id1);
|
|
if (ret != 0) {
|
|
dev_err(wm8350->dev, "Failed to read ID: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
ret = regmap_read(wm8350->regmap, WM8350_ID, &id2);
|
|
if (ret != 0) {
|
|
dev_err(wm8350->dev, "Failed to read ID: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
ret = regmap_read(wm8350->regmap, WM8350_REVISION, &mask_rev);
|
|
if (ret != 0) {
|
|
dev_err(wm8350->dev, "Failed to read revision: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
if (id1 != 0x6143) {
|
|
dev_err(wm8350->dev,
|
|
"Device with ID %x is not a WM8350\n", id1);
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
|
|
mode = (id2 & WM8350_CONF_STS_MASK) >> 10;
|
|
cust_id = id2 & WM8350_CUST_ID_MASK;
|
|
chip_rev = (id2 & WM8350_CHIP_REV_MASK) >> 12;
|
|
dev_info(wm8350->dev,
|
|
"CONF_STS %d, CUST_ID %d, MASK_REV %d, CHIP_REV %d\n",
|
|
mode, cust_id, mask_rev, chip_rev);
|
|
|
|
if (cust_id != 0) {
|
|
dev_err(wm8350->dev, "Unsupported CUST_ID\n");
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
|
|
switch (mask_rev) {
|
|
case 0:
|
|
wm8350->pmic.max_dcdc = WM8350_DCDC_6;
|
|
wm8350->pmic.max_isink = WM8350_ISINK_B;
|
|
|
|
switch (chip_rev) {
|
|
case WM8350_REV_E:
|
|
dev_info(wm8350->dev, "WM8350 Rev E\n");
|
|
break;
|
|
case WM8350_REV_F:
|
|
dev_info(wm8350->dev, "WM8350 Rev F\n");
|
|
break;
|
|
case WM8350_REV_G:
|
|
dev_info(wm8350->dev, "WM8350 Rev G\n");
|
|
wm8350->power.rev_g_coeff = 1;
|
|
break;
|
|
case WM8350_REV_H:
|
|
dev_info(wm8350->dev, "WM8350 Rev H\n");
|
|
wm8350->power.rev_g_coeff = 1;
|
|
break;
|
|
default:
|
|
/* For safety we refuse to run on unknown hardware */
|
|
dev_err(wm8350->dev, "Unknown WM8350 CHIP_REV\n");
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
break;
|
|
|
|
case 1:
|
|
wm8350->pmic.max_dcdc = WM8350_DCDC_4;
|
|
wm8350->pmic.max_isink = WM8350_ISINK_A;
|
|
|
|
switch (chip_rev) {
|
|
case 0:
|
|
dev_info(wm8350->dev, "WM8351 Rev A\n");
|
|
wm8350->power.rev_g_coeff = 1;
|
|
break;
|
|
|
|
case 1:
|
|
dev_info(wm8350->dev, "WM8351 Rev B\n");
|
|
wm8350->power.rev_g_coeff = 1;
|
|
break;
|
|
|
|
default:
|
|
dev_err(wm8350->dev, "Unknown WM8351 CHIP_REV\n");
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
wm8350->pmic.max_dcdc = WM8350_DCDC_6;
|
|
wm8350->pmic.max_isink = WM8350_ISINK_B;
|
|
|
|
switch (chip_rev) {
|
|
case 0:
|
|
dev_info(wm8350->dev, "WM8352 Rev A\n");
|
|
wm8350->power.rev_g_coeff = 1;
|
|
break;
|
|
|
|
default:
|
|
dev_err(wm8350->dev, "Unknown WM8352 CHIP_REV\n");
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
dev_err(wm8350->dev, "Unknown MASK_REV\n");
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
|
|
mutex_init(&wm8350->auxadc_mutex);
|
|
init_completion(&wm8350->auxadc_done);
|
|
|
|
ret = wm8350_irq_init(wm8350, irq, pdata);
|
|
if (ret < 0)
|
|
goto err;
|
|
|
|
if (wm8350->irq_base) {
|
|
ret = request_threaded_irq(wm8350->irq_base +
|
|
WM8350_IRQ_AUXADC_DATARDY,
|
|
NULL, wm8350_auxadc_irq,
|
|
IRQF_ONESHOT,
|
|
"auxadc", wm8350);
|
|
if (ret < 0)
|
|
dev_warn(wm8350->dev,
|
|
"Failed to request AUXADC IRQ: %d\n", ret);
|
|
}
|
|
|
|
if (pdata && pdata->init) {
|
|
ret = pdata->init(wm8350);
|
|
if (ret != 0) {
|
|
dev_err(wm8350->dev, "Platform init() failed: %d\n",
|
|
ret);
|
|
goto err_irq;
|
|
}
|
|
}
|
|
|
|
wm8350_reg_write(wm8350, WM8350_SYSTEM_INTERRUPTS_MASK, 0x0);
|
|
|
|
wm8350_client_dev_register(wm8350, "wm8350-codec",
|
|
&(wm8350->codec.pdev));
|
|
wm8350_client_dev_register(wm8350, "wm8350-gpio",
|
|
&(wm8350->gpio.pdev));
|
|
wm8350_client_dev_register(wm8350, "wm8350-hwmon",
|
|
&(wm8350->hwmon.pdev));
|
|
wm8350_client_dev_register(wm8350, "wm8350-power",
|
|
&(wm8350->power.pdev));
|
|
wm8350_client_dev_register(wm8350, "wm8350-rtc", &(wm8350->rtc.pdev));
|
|
wm8350_client_dev_register(wm8350, "wm8350-wdt", &(wm8350->wdt.pdev));
|
|
|
|
return 0;
|
|
|
|
err_irq:
|
|
wm8350_irq_exit(wm8350);
|
|
err:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(wm8350_device_init);
|