mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 01:10:04 +00:00
![Colin Ian King](/assets/img/avatar_default.png)
Several arrays are currently on-stack and instead should be made static const. Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
986 lines
24 KiB
C
986 lines
24 KiB
C
/*
|
|
* lp5523.c - LP5523, LP55231 LED Driver
|
|
*
|
|
* Copyright (C) 2010 Nokia Corporation
|
|
* Copyright (C) 2012 Texas Instruments
|
|
*
|
|
* Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
|
|
* Milo(Woogyom) Kim <milo.kim@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
|
* 02110-1301 USA
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/firmware.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/leds.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/of.h>
|
|
#include <linux/platform_data/leds-lp55xx.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include "leds-lp55xx-common.h"
|
|
|
|
#define LP5523_PROGRAM_LENGTH 32 /* bytes */
|
|
/* Memory is used like this:
|
|
0x00 engine 1 program
|
|
0x10 engine 2 program
|
|
0x20 engine 3 program
|
|
0x30 engine 1 muxing info
|
|
0x40 engine 2 muxing info
|
|
0x50 engine 3 muxing info
|
|
*/
|
|
#define LP5523_MAX_LEDS 9
|
|
|
|
/* Registers */
|
|
#define LP5523_REG_ENABLE 0x00
|
|
#define LP5523_REG_OP_MODE 0x01
|
|
#define LP5523_REG_ENABLE_LEDS_MSB 0x04
|
|
#define LP5523_REG_ENABLE_LEDS_LSB 0x05
|
|
#define LP5523_REG_LED_CTRL_BASE 0x06
|
|
#define LP5523_REG_LED_PWM_BASE 0x16
|
|
#define LP5523_REG_LED_CURRENT_BASE 0x26
|
|
#define LP5523_REG_CONFIG 0x36
|
|
#define LP5523_REG_STATUS 0x3A
|
|
#define LP5523_REG_RESET 0x3D
|
|
#define LP5523_REG_LED_TEST_CTRL 0x41
|
|
#define LP5523_REG_LED_TEST_ADC 0x42
|
|
#define LP5523_REG_MASTER_FADER_BASE 0x48
|
|
#define LP5523_REG_CH1_PROG_START 0x4C
|
|
#define LP5523_REG_CH2_PROG_START 0x4D
|
|
#define LP5523_REG_CH3_PROG_START 0x4E
|
|
#define LP5523_REG_PROG_PAGE_SEL 0x4F
|
|
#define LP5523_REG_PROG_MEM 0x50
|
|
|
|
/* Bit description in registers */
|
|
#define LP5523_ENABLE 0x40
|
|
#define LP5523_AUTO_INC 0x40
|
|
#define LP5523_PWR_SAVE 0x20
|
|
#define LP5523_PWM_PWR_SAVE 0x04
|
|
#define LP5523_CP_AUTO 0x18
|
|
#define LP5523_AUTO_CLK 0x02
|
|
|
|
#define LP5523_EN_LEDTEST 0x80
|
|
#define LP5523_LEDTEST_DONE 0x80
|
|
#define LP5523_RESET 0xFF
|
|
#define LP5523_ADC_SHORTCIRC_LIM 80
|
|
#define LP5523_EXT_CLK_USED 0x08
|
|
#define LP5523_ENG_STATUS_MASK 0x07
|
|
|
|
#define LP5523_FADER_MAPPING_MASK 0xC0
|
|
#define LP5523_FADER_MAPPING_SHIFT 6
|
|
|
|
/* Memory Page Selection */
|
|
#define LP5523_PAGE_ENG1 0
|
|
#define LP5523_PAGE_ENG2 1
|
|
#define LP5523_PAGE_ENG3 2
|
|
#define LP5523_PAGE_MUX1 3
|
|
#define LP5523_PAGE_MUX2 4
|
|
#define LP5523_PAGE_MUX3 5
|
|
|
|
/* Program Memory Operations */
|
|
#define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */
|
|
#define LP5523_MODE_ENG2_M 0x0C
|
|
#define LP5523_MODE_ENG3_M 0x03
|
|
#define LP5523_LOAD_ENG1 0x10
|
|
#define LP5523_LOAD_ENG2 0x04
|
|
#define LP5523_LOAD_ENG3 0x01
|
|
|
|
#define LP5523_ENG1_IS_LOADING(mode) \
|
|
((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1)
|
|
#define LP5523_ENG2_IS_LOADING(mode) \
|
|
((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2)
|
|
#define LP5523_ENG3_IS_LOADING(mode) \
|
|
((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3)
|
|
|
|
#define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */
|
|
#define LP5523_EXEC_ENG2_M 0x0C
|
|
#define LP5523_EXEC_ENG3_M 0x03
|
|
#define LP5523_EXEC_M 0x3F
|
|
#define LP5523_RUN_ENG1 0x20
|
|
#define LP5523_RUN_ENG2 0x08
|
|
#define LP5523_RUN_ENG3 0x02
|
|
|
|
#define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led)))
|
|
|
|
enum lp5523_chip_id {
|
|
LP5523,
|
|
LP55231,
|
|
};
|
|
|
|
static int lp5523_init_program_engine(struct lp55xx_chip *chip);
|
|
|
|
static inline void lp5523_wait_opmode_done(void)
|
|
{
|
|
usleep_range(1000, 2000);
|
|
}
|
|
|
|
static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current)
|
|
{
|
|
led->led_current = led_current;
|
|
lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
|
|
led_current);
|
|
}
|
|
|
|
static int lp5523_post_init_device(struct lp55xx_chip *chip)
|
|
{
|
|
int ret;
|
|
|
|
ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Chip startup time is 500 us, 1 - 2 ms gives some margin */
|
|
usleep_range(1000, 2000);
|
|
|
|
ret = lp55xx_write(chip, LP5523_REG_CONFIG,
|
|
LP5523_AUTO_INC | LP5523_PWR_SAVE |
|
|
LP5523_CP_AUTO | LP5523_AUTO_CLK |
|
|
LP5523_PWM_PWR_SAVE);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* turn on all leds */
|
|
ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return lp5523_init_program_engine(chip);
|
|
}
|
|
|
|
static void lp5523_load_engine(struct lp55xx_chip *chip)
|
|
{
|
|
enum lp55xx_engine_index idx = chip->engine_idx;
|
|
static const u8 mask[] = {
|
|
[LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
|
|
[LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
|
|
[LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
|
|
};
|
|
|
|
static const u8 val[] = {
|
|
[LP55XX_ENGINE_1] = LP5523_LOAD_ENG1,
|
|
[LP55XX_ENGINE_2] = LP5523_LOAD_ENG2,
|
|
[LP55XX_ENGINE_3] = LP5523_LOAD_ENG3,
|
|
};
|
|
|
|
lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]);
|
|
|
|
lp5523_wait_opmode_done();
|
|
}
|
|
|
|
static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip)
|
|
{
|
|
enum lp55xx_engine_index idx = chip->engine_idx;
|
|
static const u8 page_sel[] = {
|
|
[LP55XX_ENGINE_1] = LP5523_PAGE_ENG1,
|
|
[LP55XX_ENGINE_2] = LP5523_PAGE_ENG2,
|
|
[LP55XX_ENGINE_3] = LP5523_PAGE_ENG3,
|
|
};
|
|
|
|
lp5523_load_engine(chip);
|
|
|
|
lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]);
|
|
}
|
|
|
|
static void lp5523_stop_all_engines(struct lp55xx_chip *chip)
|
|
{
|
|
lp55xx_write(chip, LP5523_REG_OP_MODE, 0);
|
|
lp5523_wait_opmode_done();
|
|
}
|
|
|
|
static void lp5523_stop_engine(struct lp55xx_chip *chip)
|
|
{
|
|
enum lp55xx_engine_index idx = chip->engine_idx;
|
|
static const u8 mask[] = {
|
|
[LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
|
|
[LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
|
|
[LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
|
|
};
|
|
|
|
lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], 0);
|
|
|
|
lp5523_wait_opmode_done();
|
|
}
|
|
|
|
static void lp5523_turn_off_channels(struct lp55xx_chip *chip)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < LP5523_MAX_LEDS; i++)
|
|
lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0);
|
|
}
|
|
|
|
static void lp5523_run_engine(struct lp55xx_chip *chip, bool start)
|
|
{
|
|
int ret;
|
|
u8 mode;
|
|
u8 exec;
|
|
|
|
/* stop engine */
|
|
if (!start) {
|
|
lp5523_stop_engine(chip);
|
|
lp5523_turn_off_channels(chip);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* To run the engine,
|
|
* operation mode and enable register should updated at the same time
|
|
*/
|
|
|
|
ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode);
|
|
if (ret)
|
|
return;
|
|
|
|
ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec);
|
|
if (ret)
|
|
return;
|
|
|
|
/* change operation mode to RUN only when each engine is loading */
|
|
if (LP5523_ENG1_IS_LOADING(mode)) {
|
|
mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1;
|
|
exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1;
|
|
}
|
|
|
|
if (LP5523_ENG2_IS_LOADING(mode)) {
|
|
mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2;
|
|
exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2;
|
|
}
|
|
|
|
if (LP5523_ENG3_IS_LOADING(mode)) {
|
|
mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3;
|
|
exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3;
|
|
}
|
|
|
|
lp55xx_write(chip, LP5523_REG_OP_MODE, mode);
|
|
lp5523_wait_opmode_done();
|
|
|
|
lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec);
|
|
}
|
|
|
|
static int lp5523_init_program_engine(struct lp55xx_chip *chip)
|
|
{
|
|
int i;
|
|
int j;
|
|
int ret;
|
|
u8 status;
|
|
/* one pattern per engine setting LED MUX start and stop addresses */
|
|
static const u8 pattern[][LP5523_PROGRAM_LENGTH] = {
|
|
{ 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0},
|
|
{ 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0},
|
|
{ 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0},
|
|
};
|
|
|
|
/* hardcode 32 bytes of memory for each engine from program memory */
|
|
ret = lp55xx_write(chip, LP5523_REG_CH1_PROG_START, 0x00);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = lp55xx_write(chip, LP5523_REG_CH2_PROG_START, 0x10);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = lp55xx_write(chip, LP5523_REG_CH3_PROG_START, 0x20);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* write LED MUX address space for each engine */
|
|
for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
|
|
chip->engine_idx = i;
|
|
lp5523_load_engine_and_select_page(chip);
|
|
|
|
for (j = 0; j < LP5523_PROGRAM_LENGTH; j++) {
|
|
ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + j,
|
|
pattern[i - 1][j]);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
lp5523_run_engine(chip, true);
|
|
|
|
/* Let the programs run for couple of ms and check the engine status */
|
|
usleep_range(3000, 6000);
|
|
lp55xx_read(chip, LP5523_REG_STATUS, &status);
|
|
status &= LP5523_ENG_STATUS_MASK;
|
|
|
|
if (status != LP5523_ENG_STATUS_MASK) {
|
|
dev_err(&chip->cl->dev,
|
|
"cound not configure LED engine, status = 0x%.2x\n",
|
|
status);
|
|
ret = -1;
|
|
}
|
|
|
|
out:
|
|
lp5523_stop_all_engines(chip);
|
|
return ret;
|
|
}
|
|
|
|
static int lp5523_update_program_memory(struct lp55xx_chip *chip,
|
|
const u8 *data, size_t size)
|
|
{
|
|
u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
|
|
unsigned cmd;
|
|
char c[3];
|
|
int nrchars;
|
|
int ret;
|
|
int offset = 0;
|
|
int i = 0;
|
|
|
|
while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) {
|
|
/* separate sscanfs because length is working only for %s */
|
|
ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
|
|
if (ret != 1)
|
|
goto err;
|
|
|
|
ret = sscanf(c, "%2x", &cmd);
|
|
if (ret != 1)
|
|
goto err;
|
|
|
|
pattern[i] = (u8)cmd;
|
|
offset += nrchars;
|
|
i++;
|
|
}
|
|
|
|
/* Each instruction is 16bit long. Check that length is even */
|
|
if (i % 2)
|
|
goto err;
|
|
|
|
for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) {
|
|
ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]);
|
|
if (ret)
|
|
return -EINVAL;
|
|
}
|
|
|
|
return size;
|
|
|
|
err:
|
|
dev_err(&chip->cl->dev, "wrong pattern format\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void lp5523_firmware_loaded(struct lp55xx_chip *chip)
|
|
{
|
|
const struct firmware *fw = chip->fw;
|
|
|
|
if (fw->size > LP5523_PROGRAM_LENGTH) {
|
|
dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
|
|
fw->size);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Program memory sequence
|
|
* 1) set engine mode to "LOAD"
|
|
* 2) write firmware data into program memory
|
|
*/
|
|
|
|
lp5523_load_engine_and_select_page(chip);
|
|
lp5523_update_program_memory(chip, fw->data, fw->size);
|
|
}
|
|
|
|
static ssize_t show_engine_mode(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf, int nr)
|
|
{
|
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct lp55xx_chip *chip = led->chip;
|
|
enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode;
|
|
|
|
switch (mode) {
|
|
case LP55XX_ENGINE_RUN:
|
|
return sprintf(buf, "run\n");
|
|
case LP55XX_ENGINE_LOAD:
|
|
return sprintf(buf, "load\n");
|
|
case LP55XX_ENGINE_DISABLED:
|
|
default:
|
|
return sprintf(buf, "disabled\n");
|
|
}
|
|
}
|
|
show_mode(1)
|
|
show_mode(2)
|
|
show_mode(3)
|
|
|
|
static ssize_t store_engine_mode(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len, int nr)
|
|
{
|
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct lp55xx_chip *chip = led->chip;
|
|
struct lp55xx_engine *engine = &chip->engines[nr - 1];
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
chip->engine_idx = nr;
|
|
|
|
if (!strncmp(buf, "run", 3)) {
|
|
lp5523_run_engine(chip, true);
|
|
engine->mode = LP55XX_ENGINE_RUN;
|
|
} else if (!strncmp(buf, "load", 4)) {
|
|
lp5523_stop_engine(chip);
|
|
lp5523_load_engine(chip);
|
|
engine->mode = LP55XX_ENGINE_LOAD;
|
|
} else if (!strncmp(buf, "disabled", 8)) {
|
|
lp5523_stop_engine(chip);
|
|
engine->mode = LP55XX_ENGINE_DISABLED;
|
|
}
|
|
|
|
mutex_unlock(&chip->lock);
|
|
|
|
return len;
|
|
}
|
|
store_mode(1)
|
|
store_mode(2)
|
|
store_mode(3)
|
|
|
|
static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len)
|
|
{
|
|
u16 tmp_mux = 0;
|
|
int i;
|
|
|
|
len = min_t(int, len, LP5523_MAX_LEDS);
|
|
|
|
for (i = 0; i < len; i++) {
|
|
switch (buf[i]) {
|
|
case '1':
|
|
tmp_mux |= (1 << i);
|
|
break;
|
|
case '0':
|
|
break;
|
|
case '\n':
|
|
i = len;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
*mux = tmp_mux;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void lp5523_mux_to_array(u16 led_mux, char *array)
|
|
{
|
|
int i, pos = 0;
|
|
for (i = 0; i < LP5523_MAX_LEDS; i++)
|
|
pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
|
|
|
|
array[pos] = '\0';
|
|
}
|
|
|
|
static ssize_t show_engine_leds(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf, int nr)
|
|
{
|
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct lp55xx_chip *chip = led->chip;
|
|
char mux[LP5523_MAX_LEDS + 1];
|
|
|
|
lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux);
|
|
|
|
return sprintf(buf, "%s\n", mux);
|
|
}
|
|
show_leds(1)
|
|
show_leds(2)
|
|
show_leds(3)
|
|
|
|
static int lp5523_load_mux(struct lp55xx_chip *chip, u16 mux, int nr)
|
|
{
|
|
struct lp55xx_engine *engine = &chip->engines[nr - 1];
|
|
int ret;
|
|
static const u8 mux_page[] = {
|
|
[LP55XX_ENGINE_1] = LP5523_PAGE_MUX1,
|
|
[LP55XX_ENGINE_2] = LP5523_PAGE_MUX2,
|
|
[LP55XX_ENGINE_3] = LP5523_PAGE_MUX3,
|
|
};
|
|
|
|
lp5523_load_engine(chip);
|
|
|
|
ret = lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, mux_page[nr]);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = lp55xx_write(chip, LP5523_REG_PROG_MEM , (u8)(mux >> 8));
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + 1, (u8)(mux));
|
|
if (ret)
|
|
return ret;
|
|
|
|
engine->led_mux = mux;
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t store_engine_leds(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len, int nr)
|
|
{
|
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct lp55xx_chip *chip = led->chip;
|
|
struct lp55xx_engine *engine = &chip->engines[nr - 1];
|
|
u16 mux = 0;
|
|
ssize_t ret;
|
|
|
|
if (lp5523_mux_parse(buf, &mux, len))
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
chip->engine_idx = nr;
|
|
ret = -EINVAL;
|
|
|
|
if (engine->mode != LP55XX_ENGINE_LOAD)
|
|
goto leave;
|
|
|
|
if (lp5523_load_mux(chip, mux, nr))
|
|
goto leave;
|
|
|
|
ret = len;
|
|
leave:
|
|
mutex_unlock(&chip->lock);
|
|
return ret;
|
|
}
|
|
store_leds(1)
|
|
store_leds(2)
|
|
store_leds(3)
|
|
|
|
static ssize_t store_engine_load(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len, int nr)
|
|
{
|
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct lp55xx_chip *chip = led->chip;
|
|
int ret;
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
chip->engine_idx = nr;
|
|
lp5523_load_engine_and_select_page(chip);
|
|
ret = lp5523_update_program_memory(chip, buf, len);
|
|
|
|
mutex_unlock(&chip->lock);
|
|
|
|
return ret;
|
|
}
|
|
store_load(1)
|
|
store_load(2)
|
|
store_load(3)
|
|
|
|
static ssize_t lp5523_selftest(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct lp55xx_chip *chip = led->chip;
|
|
struct lp55xx_platform_data *pdata = chip->pdata;
|
|
int i, ret, pos = 0;
|
|
u8 status, adc, vdd;
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
/* Check that ext clock is really in use if requested */
|
|
if (pdata->clock_mode == LP55XX_CLOCK_EXT) {
|
|
if ((status & LP5523_EXT_CLK_USED) == 0)
|
|
goto fail;
|
|
}
|
|
|
|
/* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */
|
|
lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16);
|
|
usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */
|
|
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
if (!(status & LP5523_LEDTEST_DONE))
|
|
usleep_range(3000, 6000); /* Was not ready. Wait little bit */
|
|
|
|
ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
vdd--; /* There may be some fluctuation in measurement */
|
|
|
|
for (i = 0; i < LP5523_MAX_LEDS; i++) {
|
|
/* Skip non-existing channels */
|
|
if (pdata->led_config[i].led_current == 0)
|
|
continue;
|
|
|
|
/* Set default current */
|
|
lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
|
|
pdata->led_config[i].led_current);
|
|
|
|
lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff);
|
|
/* let current stabilize 2 - 4ms before measurements start */
|
|
usleep_range(2000, 4000);
|
|
lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL,
|
|
LP5523_EN_LEDTEST | i);
|
|
/* ADC conversion time is 2.7 ms typically */
|
|
usleep_range(3000, 6000);
|
|
ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
if (!(status & LP5523_LEDTEST_DONE))
|
|
usleep_range(3000, 6000);/* Was not ready. Wait. */
|
|
|
|
ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM)
|
|
pos += sprintf(buf + pos, "LED %d FAIL\n", i);
|
|
|
|
lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00);
|
|
|
|
/* Restore current */
|
|
lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
|
|
led->led_current);
|
|
led++;
|
|
}
|
|
if (pos == 0)
|
|
pos = sprintf(buf, "OK\n");
|
|
goto release_lock;
|
|
fail:
|
|
pos = sprintf(buf, "FAIL\n");
|
|
|
|
release_lock:
|
|
mutex_unlock(&chip->lock);
|
|
|
|
return pos;
|
|
}
|
|
|
|
#define show_fader(nr) \
|
|
static ssize_t show_master_fader##nr(struct device *dev, \
|
|
struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
return show_master_fader(dev, attr, buf, nr); \
|
|
}
|
|
|
|
#define store_fader(nr) \
|
|
static ssize_t store_master_fader##nr(struct device *dev, \
|
|
struct device_attribute *attr, \
|
|
const char *buf, size_t len) \
|
|
{ \
|
|
return store_master_fader(dev, attr, buf, len, nr); \
|
|
}
|
|
|
|
static ssize_t show_master_fader(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf, int nr)
|
|
{
|
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct lp55xx_chip *chip = led->chip;
|
|
int ret;
|
|
u8 val;
|
|
|
|
mutex_lock(&chip->lock);
|
|
ret = lp55xx_read(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1, &val);
|
|
mutex_unlock(&chip->lock);
|
|
|
|
if (ret == 0)
|
|
ret = sprintf(buf, "%u\n", val);
|
|
|
|
return ret;
|
|
}
|
|
show_fader(1)
|
|
show_fader(2)
|
|
show_fader(3)
|
|
|
|
static ssize_t store_master_fader(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len, int nr)
|
|
{
|
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct lp55xx_chip *chip = led->chip;
|
|
int ret;
|
|
unsigned long val;
|
|
|
|
if (kstrtoul(buf, 0, &val))
|
|
return -EINVAL;
|
|
|
|
if (val > 0xff)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&chip->lock);
|
|
ret = lp55xx_write(chip, LP5523_REG_MASTER_FADER_BASE + nr - 1,
|
|
(u8)val);
|
|
mutex_unlock(&chip->lock);
|
|
|
|
if (ret == 0)
|
|
ret = len;
|
|
|
|
return ret;
|
|
}
|
|
store_fader(1)
|
|
store_fader(2)
|
|
store_fader(3)
|
|
|
|
static ssize_t show_master_fader_leds(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct lp55xx_chip *chip = led->chip;
|
|
int i, ret, pos = 0;
|
|
u8 val;
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
for (i = 0; i < LP5523_MAX_LEDS; i++) {
|
|
ret = lp55xx_read(chip, LP5523_REG_LED_CTRL_BASE + i, &val);
|
|
if (ret)
|
|
goto leave;
|
|
|
|
val = (val & LP5523_FADER_MAPPING_MASK)
|
|
>> LP5523_FADER_MAPPING_SHIFT;
|
|
if (val > 3) {
|
|
ret = -EINVAL;
|
|
goto leave;
|
|
}
|
|
buf[pos++] = val + '0';
|
|
}
|
|
buf[pos++] = '\n';
|
|
ret = pos;
|
|
leave:
|
|
mutex_unlock(&chip->lock);
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t store_master_fader_leds(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct lp55xx_chip *chip = led->chip;
|
|
int i, n, ret;
|
|
u8 val;
|
|
|
|
n = min_t(int, len, LP5523_MAX_LEDS);
|
|
|
|
mutex_lock(&chip->lock);
|
|
|
|
for (i = 0; i < n; i++) {
|
|
if (buf[i] >= '0' && buf[i] <= '3') {
|
|
val = (buf[i] - '0') << LP5523_FADER_MAPPING_SHIFT;
|
|
ret = lp55xx_update_bits(chip,
|
|
LP5523_REG_LED_CTRL_BASE + i,
|
|
LP5523_FADER_MAPPING_MASK,
|
|
val);
|
|
if (ret)
|
|
goto leave;
|
|
} else {
|
|
ret = -EINVAL;
|
|
goto leave;
|
|
}
|
|
}
|
|
ret = len;
|
|
leave:
|
|
mutex_unlock(&chip->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int lp5523_led_brightness(struct lp55xx_led *led)
|
|
{
|
|
struct lp55xx_chip *chip = led->chip;
|
|
int ret;
|
|
|
|
mutex_lock(&chip->lock);
|
|
ret = lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,
|
|
led->brightness);
|
|
mutex_unlock(&chip->lock);
|
|
return ret;
|
|
}
|
|
|
|
static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode);
|
|
static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode);
|
|
static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode);
|
|
static LP55XX_DEV_ATTR_RW(engine1_leds, show_engine1_leds, store_engine1_leds);
|
|
static LP55XX_DEV_ATTR_RW(engine2_leds, show_engine2_leds, store_engine2_leds);
|
|
static LP55XX_DEV_ATTR_RW(engine3_leds, show_engine3_leds, store_engine3_leds);
|
|
static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load);
|
|
static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load);
|
|
static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load);
|
|
static LP55XX_DEV_ATTR_RO(selftest, lp5523_selftest);
|
|
static LP55XX_DEV_ATTR_RW(master_fader1, show_master_fader1,
|
|
store_master_fader1);
|
|
static LP55XX_DEV_ATTR_RW(master_fader2, show_master_fader2,
|
|
store_master_fader2);
|
|
static LP55XX_DEV_ATTR_RW(master_fader3, show_master_fader3,
|
|
store_master_fader3);
|
|
static LP55XX_DEV_ATTR_RW(master_fader_leds, show_master_fader_leds,
|
|
store_master_fader_leds);
|
|
|
|
static struct attribute *lp5523_attributes[] = {
|
|
&dev_attr_engine1_mode.attr,
|
|
&dev_attr_engine2_mode.attr,
|
|
&dev_attr_engine3_mode.attr,
|
|
&dev_attr_engine1_load.attr,
|
|
&dev_attr_engine2_load.attr,
|
|
&dev_attr_engine3_load.attr,
|
|
&dev_attr_engine1_leds.attr,
|
|
&dev_attr_engine2_leds.attr,
|
|
&dev_attr_engine3_leds.attr,
|
|
&dev_attr_selftest.attr,
|
|
&dev_attr_master_fader1.attr,
|
|
&dev_attr_master_fader2.attr,
|
|
&dev_attr_master_fader3.attr,
|
|
&dev_attr_master_fader_leds.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group lp5523_group = {
|
|
.attrs = lp5523_attributes,
|
|
};
|
|
|
|
/* Chip specific configurations */
|
|
static struct lp55xx_device_config lp5523_cfg = {
|
|
.reset = {
|
|
.addr = LP5523_REG_RESET,
|
|
.val = LP5523_RESET,
|
|
},
|
|
.enable = {
|
|
.addr = LP5523_REG_ENABLE,
|
|
.val = LP5523_ENABLE,
|
|
},
|
|
.max_channel = LP5523_MAX_LEDS,
|
|
.post_init_device = lp5523_post_init_device,
|
|
.brightness_fn = lp5523_led_brightness,
|
|
.set_led_current = lp5523_set_led_current,
|
|
.firmware_cb = lp5523_firmware_loaded,
|
|
.run_engine = lp5523_run_engine,
|
|
.dev_attr_group = &lp5523_group,
|
|
};
|
|
|
|
static int lp5523_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
int ret;
|
|
struct lp55xx_chip *chip;
|
|
struct lp55xx_led *led;
|
|
struct lp55xx_platform_data *pdata = dev_get_platdata(&client->dev);
|
|
struct device_node *np = client->dev.of_node;
|
|
|
|
if (!pdata) {
|
|
if (np) {
|
|
pdata = lp55xx_of_populate_pdata(&client->dev, np);
|
|
if (IS_ERR(pdata))
|
|
return PTR_ERR(pdata);
|
|
} else {
|
|
dev_err(&client->dev, "no platform data\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
|
|
if (!chip)
|
|
return -ENOMEM;
|
|
|
|
led = devm_kzalloc(&client->dev,
|
|
sizeof(*led) * pdata->num_channels, GFP_KERNEL);
|
|
if (!led)
|
|
return -ENOMEM;
|
|
|
|
chip->cl = client;
|
|
chip->pdata = pdata;
|
|
chip->cfg = &lp5523_cfg;
|
|
|
|
mutex_init(&chip->lock);
|
|
|
|
i2c_set_clientdata(client, led);
|
|
|
|
ret = lp55xx_init_device(chip);
|
|
if (ret)
|
|
goto err_init;
|
|
|
|
dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
|
|
|
|
ret = lp55xx_register_leds(led, chip);
|
|
if (ret)
|
|
goto err_register_leds;
|
|
|
|
ret = lp55xx_register_sysfs(chip);
|
|
if (ret) {
|
|
dev_err(&client->dev, "registering sysfs failed\n");
|
|
goto err_register_sysfs;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_register_sysfs:
|
|
lp55xx_unregister_leds(led, chip);
|
|
err_register_leds:
|
|
lp55xx_deinit_device(chip);
|
|
err_init:
|
|
return ret;
|
|
}
|
|
|
|
static int lp5523_remove(struct i2c_client *client)
|
|
{
|
|
struct lp55xx_led *led = i2c_get_clientdata(client);
|
|
struct lp55xx_chip *chip = led->chip;
|
|
|
|
lp5523_stop_all_engines(chip);
|
|
lp55xx_unregister_sysfs(chip);
|
|
lp55xx_unregister_leds(led, chip);
|
|
lp55xx_deinit_device(chip);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id lp5523_id[] = {
|
|
{ "lp5523", LP5523 },
|
|
{ "lp55231", LP55231 },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, lp5523_id);
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id of_lp5523_leds_match[] = {
|
|
{ .compatible = "national,lp5523", },
|
|
{ .compatible = "ti,lp55231", },
|
|
{},
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, of_lp5523_leds_match);
|
|
#endif
|
|
|
|
static struct i2c_driver lp5523_driver = {
|
|
.driver = {
|
|
.name = "lp5523x",
|
|
.of_match_table = of_match_ptr(of_lp5523_leds_match),
|
|
},
|
|
.probe = lp5523_probe,
|
|
.remove = lp5523_remove,
|
|
.id_table = lp5523_id,
|
|
};
|
|
|
|
module_i2c_driver(lp5523_driver);
|
|
|
|
MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>");
|
|
MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
|
|
MODULE_DESCRIPTION("LP5523 LED engine");
|
|
MODULE_LICENSE("GPL");
|