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leds-lp5523: use generic firmware interface
LP55xx common driver provides generic firmware interface for running a LED pattern. LP5521 and LP5523 have many device attributes for running patterns. This patch cleans up those complex code. Removed device attributes: engine1_mode engine2_mode engine3_mode engine1_load engine2_load engine3_load engine1_leds engine2_leds engine3_leds All device attributes and functions are replaced with two callback functions, 'firmware_cb' and 'run_engine'. New engine functions: lp5523_load/stop/run_engine(), lp5523_update_program_memory() and lp5523_wait_opmode_done() Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Bryan Wu <cooloney@gmail.com>
This commit is contained in:
Milo(Woogyom) Kim
Bryan Wu
parent
9ce7cb170f
commit
db6eaf8388
@ -35,6 +35,7 @@
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#include <linux/workqueue.h>
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#include <linux/slab.h>
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#include <linux/platform_data/leds-lp55xx.h>
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#include <linux/firmware.h>
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#include "leds-lp55xx-common.h"
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@ -108,20 +109,39 @@
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#define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led)))
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#define SHIFT_MASK(id) (((id) - 1) * 2)
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/* Memory Page Selection */
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#define LP5523_PAGE_ENG1 0
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#define LP5523_PAGE_ENG2 1
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#define LP5523_PAGE_ENG3 2
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/* Program Memory Operations */
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#define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */
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#define LP5523_MODE_ENG2_M 0x0C
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#define LP5523_MODE_ENG3_M 0x03
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#define LP5523_LOAD_ENG1 0x10
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#define LP5523_LOAD_ENG2 0x04
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#define LP5523_LOAD_ENG3 0x01
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#define LP5523_ENG1_IS_LOADING(mode) \
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((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1)
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#define LP5523_ENG2_IS_LOADING(mode) \
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((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2)
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#define LP5523_ENG3_IS_LOADING(mode) \
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((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3)
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#define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */
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#define LP5523_EXEC_ENG2_M 0x0C
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#define LP5523_EXEC_ENG3_M 0x03
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#define LP5523_EXEC_M 0x3F
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#define LP5523_RUN_ENG1 0x20
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#define LP5523_RUN_ENG2 0x08
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#define LP5523_RUN_ENG3 0x02
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enum lp5523_chip_id {
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LP5523,
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LP55231,
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};
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struct lp5523_engine {
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int id;
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u8 mode;
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u8 prog_page;
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u8 mux_page;
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u16 led_mux;
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u8 engine_mask;
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};
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struct lp5523_led {
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int id;
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u8 chan_nr;
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@ -135,13 +155,17 @@ struct lp5523_led {
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struct lp5523_chip {
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struct mutex lock; /* Serialize control */
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struct i2c_client *client;
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struct lp5523_engine engines[LP5523_ENGINES];
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struct lp5523_led leds[LP5523_MAX_LEDS];
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struct lp5523_platform_data *pdata;
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u8 num_channels;
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u8 num_leds;
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};
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static inline void lp5523_wait_opmode_done(void)
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{
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usleep_range(1000, 2000);
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}
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static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current)
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{
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led->led_current = led_current;
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@ -149,27 +173,6 @@ static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current)
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led_current);
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}
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static inline struct lp5523_led *cdev_to_led(struct led_classdev *cdev)
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{
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return container_of(cdev, struct lp5523_led, cdev);
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}
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static inline struct lp5523_chip *engine_to_lp5523(struct lp5523_engine *engine)
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{
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return container_of(engine, struct lp5523_chip,
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engines[engine->id - 1]);
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}
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static inline struct lp5523_chip *led_to_lp5523(struct lp5523_led *led)
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{
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return container_of(led, struct lp5523_chip,
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leds[led->id]);
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}
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static void lp5523_set_mode(struct lp5523_engine *engine, u8 mode);
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static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode);
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static int lp5523_load_program(struct lp5523_engine *engine, const u8 *pattern);
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static int lp5523_write(struct i2c_client *client, u8 reg, u8 value)
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{
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return i2c_smbus_write_byte_data(client, reg, value);
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@ -212,178 +215,163 @@ static int lp5523_post_init_device(struct lp55xx_chip *chip)
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return lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
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}
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static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode)
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static void lp5523_load_engine(struct lp55xx_chip *chip)
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{
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struct lp5523_chip *chip = engine_to_lp5523(engine);
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struct i2c_client *client = chip->client;
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int ret;
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u8 engine_state;
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enum lp55xx_engine_index idx = chip->engine_idx;
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u8 mask[] = {
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[LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
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[LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
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[LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
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};
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ret = lp5523_read(client, LP5523_REG_OP_MODE, &engine_state);
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if (ret)
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goto fail;
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u8 val[] = {
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[LP55XX_ENGINE_1] = LP5523_LOAD_ENG1,
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[LP55XX_ENGINE_2] = LP5523_LOAD_ENG2,
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[LP55XX_ENGINE_3] = LP5523_LOAD_ENG3,
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};
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engine_state &= ~(engine->engine_mask);
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u8 page_sel[] = {
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[LP55XX_ENGINE_1] = LP5523_PAGE_ENG1,
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[LP55XX_ENGINE_2] = LP5523_PAGE_ENG2,
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[LP55XX_ENGINE_3] = LP5523_PAGE_ENG3,
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};
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/* set mode only for this engine */
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mode &= engine->engine_mask;
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lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]);
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engine_state |= mode;
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lp5523_wait_opmode_done();
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ret |= lp5523_write(client, LP5523_REG_OP_MODE, engine_state);
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fail:
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return ret;
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lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]);
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}
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static int lp5523_load_mux(struct lp5523_engine *engine, u16 mux)
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static void lp5523_stop_engine(struct lp55xx_chip *chip)
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{
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struct lp5523_chip *chip = engine_to_lp5523(engine);
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struct i2c_client *client = chip->client;
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int ret = 0;
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ret |= lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
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ret |= lp5523_write(client, LP5523_REG_PROG_PAGE_SEL, engine->mux_page);
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ret |= lp5523_write(client, LP5523_REG_PROG_MEM,
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(u8)(mux >> 8));
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ret |= lp5523_write(client, LP5523_REG_PROG_MEM + 1, (u8)(mux));
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engine->led_mux = mux;
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return ret;
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lp55xx_write(chip, LP5523_REG_OP_MODE, 0);
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lp5523_wait_opmode_done();
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}
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static int lp5523_load_program(struct lp5523_engine *engine, const u8 *pattern)
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{
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struct lp5523_chip *chip = engine_to_lp5523(engine);
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struct i2c_client *client = chip->client;
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int ret = 0;
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ret |= lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
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ret |= lp5523_write(client, LP5523_REG_PROG_PAGE_SEL,
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engine->prog_page);
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ret |= i2c_smbus_write_i2c_block_data(client, LP5523_REG_PROG_MEM,
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LP5523_PROGRAM_LENGTH, pattern);
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return ret;
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}
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static int lp5523_run_program(struct lp5523_engine *engine)
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{
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struct lp5523_chip *chip = engine_to_lp5523(engine);
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struct i2c_client *client = chip->client;
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int ret;
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ret = lp5523_write(client, LP5523_REG_ENABLE,
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LP5523_CMD_RUN | LP5523_ENABLE);
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if (ret)
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goto fail;
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ret = lp5523_set_engine_mode(engine, LP5523_CMD_RUN);
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fail:
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return ret;
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}
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static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len)
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static void lp5523_turn_off_channels(struct lp55xx_chip *chip)
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{
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int i;
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u16 tmp_mux = 0;
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len = min_t(int, len, LP5523_MAX_LEDS);
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for (i = 0; i < len; i++) {
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switch (buf[i]) {
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case '1':
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tmp_mux |= (1 << i);
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break;
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case '0':
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break;
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case '\n':
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i = len;
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break;
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default:
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return -1;
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}
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for (i = 0; i < LP5523_MAX_LEDS; i++)
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lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0);
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}
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static void lp5523_run_engine(struct lp55xx_chip *chip, bool start)
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{
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int ret;
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u8 mode;
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u8 exec;
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/* stop engine */
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if (!start) {
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lp5523_stop_engine(chip);
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lp5523_turn_off_channels(chip);
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return;
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}
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*mux = tmp_mux;
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/*
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* To run the engine,
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* operation mode and enable register should updated at the same time
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*/
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ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode);
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if (ret)
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return;
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ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec);
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if (ret)
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return;
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/* change operation mode to RUN only when each engine is loading */
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if (LP5523_ENG1_IS_LOADING(mode)) {
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mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1;
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exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1;
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}
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if (LP5523_ENG2_IS_LOADING(mode)) {
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mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2;
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exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2;
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}
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if (LP5523_ENG3_IS_LOADING(mode)) {
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mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3;
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exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3;
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}
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lp55xx_write(chip, LP5523_REG_OP_MODE, mode);
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lp5523_wait_opmode_done();
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lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec);
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}
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static int lp5523_update_program_memory(struct lp55xx_chip *chip,
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const u8 *data, size_t size)
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{
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u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
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unsigned cmd;
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char c[3];
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int update_size;
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int nrchars;
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int offset = 0;
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int ret;
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int i;
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/* clear program memory before updating */
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for (i = 0; i < LP5523_PROGRAM_LENGTH; i++)
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lp55xx_write(chip, LP5523_REG_PROG_MEM + i, 0);
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i = 0;
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while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) {
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/* separate sscanfs because length is working only for %s */
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ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
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if (ret != 1)
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goto err;
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ret = sscanf(c, "%2x", &cmd);
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if (ret != 1)
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goto err;
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pattern[i] = (u8)cmd;
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offset += nrchars;
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i++;
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}
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/* Each instruction is 16bit long. Check that length is even */
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if (i % 2)
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goto err;
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update_size = i;
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for (i = 0; i < update_size; i++)
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lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]);
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return 0;
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err:
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dev_err(&chip->cl->dev, "wrong pattern format\n");
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return -EINVAL;
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}
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static void lp5523_mux_to_array(u16 led_mux, char *array)
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static void lp5523_firmware_loaded(struct lp55xx_chip *chip)
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{
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int i, pos = 0;
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for (i = 0; i < LP5523_MAX_LEDS; i++)
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pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
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const struct firmware *fw = chip->fw;
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array[pos] = '\0';
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if (fw->size > LP5523_PROGRAM_LENGTH) {
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dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
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fw->size);
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return;
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}
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/*
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* Program momery sequence
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* 1) set engine mode to "LOAD"
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* 2) write firmware data into program memory
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*/
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lp5523_load_engine(chip);
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lp5523_update_program_memory(chip, fw->data, fw->size);
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}
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/*--------------------------------------------------------------*/
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/* Sysfs interface */
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/*--------------------------------------------------------------*/
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static ssize_t show_engine_leds(struct device *dev,
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struct device_attribute *attr,
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char *buf, int nr)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lp5523_chip *chip = i2c_get_clientdata(client);
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char mux[LP5523_MAX_LEDS + 1];
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lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux);
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return sprintf(buf, "%s\n", mux);
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}
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#define show_leds(nr) \
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static ssize_t show_engine##nr##_leds(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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return show_engine_leds(dev, attr, buf, nr); \
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}
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show_leds(1)
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show_leds(2)
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show_leds(3)
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static ssize_t store_engine_leds(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t len, int nr)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lp5523_chip *chip = i2c_get_clientdata(client);
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u16 mux = 0;
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ssize_t ret;
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if (lp5523_mux_parse(buf, &mux, len))
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return -EINVAL;
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mutex_lock(&chip->lock);
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ret = -EINVAL;
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if (chip->engines[nr - 1].mode != LP5523_CMD_LOAD)
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goto leave;
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if (lp5523_load_mux(&chip->engines[nr - 1], mux))
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goto leave;
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ret = len;
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leave:
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mutex_unlock(&chip->lock);
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return ret;
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}
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#define store_leds(nr) \
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static ssize_t store_engine##nr##_leds(struct device *dev, \
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struct device_attribute *attr, \
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const char *buf, size_t len) \
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{ \
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return store_engine_leds(dev, attr, buf, len, nr); \
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}
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store_leds(1)
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store_leds(2)
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store_leds(3)
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static ssize_t lp5523_selftest(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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@ -485,159 +473,10 @@ static void lp5523_led_brightness_work(struct work_struct *work)
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mutex_unlock(&chip->lock);
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}
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static int lp5523_do_store_load(struct lp5523_engine *engine,
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const char *buf, size_t len)
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{
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struct lp5523_chip *chip = engine_to_lp5523(engine);
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struct i2c_client *client = chip->client;
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int ret, nrchars, offset = 0, i = 0;
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char c[3];
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unsigned cmd;
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u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
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if (engine->mode != LP5523_CMD_LOAD)
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return -EINVAL;
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while ((offset < len - 1) && (i < LP5523_PROGRAM_LENGTH)) {
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/* separate sscanfs because length is working only for %s */
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ret = sscanf(buf + offset, "%2s%n ", c, &nrchars);
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ret = sscanf(c, "%2x", &cmd);
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if (ret != 1)
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goto fail;
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pattern[i] = (u8)cmd;
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offset += nrchars;
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i++;
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}
|
||||
|
||||
/* Each instruction is 16bit long. Check that length is even */
|
||||
if (i % 2)
|
||||
goto fail;
|
||||
|
||||
mutex_lock(&chip->lock);
|
||||
ret = lp5523_load_program(engine, pattern);
|
||||
mutex_unlock(&chip->lock);
|
||||
|
||||
if (ret) {
|
||||
dev_err(&client->dev, "failed loading pattern\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
return len;
|
||||
fail:
|
||||
dev_err(&client->dev, "wrong pattern format\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
static ssize_t store_engine_load(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf, size_t len, int nr)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(dev);
|
||||
struct lp5523_chip *chip = i2c_get_clientdata(client);
|
||||
return lp5523_do_store_load(&chip->engines[nr - 1], buf, len);
|
||||
}
|
||||
|
||||
#define store_load(nr) \
|
||||
static ssize_t store_engine##nr##_load(struct device *dev, \
|
||||
struct device_attribute *attr, \
|
||||
const char *buf, size_t len) \
|
||||
{ \
|
||||
return store_engine_load(dev, attr, buf, len, nr); \
|
||||
}
|
||||
store_load(1)
|
||||
store_load(2)
|
||||
store_load(3)
|
||||
|
||||
static ssize_t show_engine_mode(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
char *buf, int nr)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(dev);
|
||||
struct lp5523_chip *chip = i2c_get_clientdata(client);
|
||||
switch (chip->engines[nr - 1].mode) {
|
||||
case LP5523_CMD_RUN:
|
||||
return sprintf(buf, "run\n");
|
||||
case LP5523_CMD_LOAD:
|
||||
return sprintf(buf, "load\n");
|
||||
case LP5523_CMD_DISABLED:
|
||||
return sprintf(buf, "disabled\n");
|
||||
default:
|
||||
return sprintf(buf, "disabled\n");
|
||||
}
|
||||
}
|
||||
|
||||
#define show_mode(nr) \
|
||||
static ssize_t show_engine##nr##_mode(struct device *dev, \
|
||||
struct device_attribute *attr, \
|
||||
char *buf) \
|
||||
{ \
|
||||
return show_engine_mode(dev, attr, buf, nr); \
|
||||
}
|
||||
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 i2c_client *client = to_i2c_client(dev);
|
||||
struct lp5523_chip *chip = i2c_get_clientdata(client);
|
||||
struct lp5523_engine *engine = &chip->engines[nr - 1];
|
||||
mutex_lock(&chip->lock);
|
||||
|
||||
if (!strncmp(buf, "run", 3))
|
||||
lp5523_set_mode(engine, LP5523_CMD_RUN);
|
||||
else if (!strncmp(buf, "load", 4))
|
||||
lp5523_set_mode(engine, LP5523_CMD_LOAD);
|
||||
else if (!strncmp(buf, "disabled", 8))
|
||||
lp5523_set_mode(engine, LP5523_CMD_DISABLED);
|
||||
|
||||
mutex_unlock(&chip->lock);
|
||||
return len;
|
||||
}
|
||||
|
||||
#define store_mode(nr) \
|
||||
static ssize_t store_engine##nr##_mode(struct device *dev, \
|
||||
struct device_attribute *attr, \
|
||||
const char *buf, size_t len) \
|
||||
{ \
|
||||
return store_engine_mode(dev, attr, buf, len, nr); \
|
||||
}
|
||||
store_mode(1)
|
||||
store_mode(2)
|
||||
store_mode(3)
|
||||
|
||||
/* device attributes */
|
||||
static DEVICE_ATTR(engine1_mode, S_IRUGO | S_IWUSR,
|
||||
show_engine1_mode, store_engine1_mode);
|
||||
static DEVICE_ATTR(engine2_mode, S_IRUGO | S_IWUSR,
|
||||
show_engine2_mode, store_engine2_mode);
|
||||
static DEVICE_ATTR(engine3_mode, S_IRUGO | S_IWUSR,
|
||||
show_engine3_mode, store_engine3_mode);
|
||||
static DEVICE_ATTR(engine1_leds, S_IRUGO | S_IWUSR,
|
||||
show_engine1_leds, store_engine1_leds);
|
||||
static DEVICE_ATTR(engine2_leds, S_IRUGO | S_IWUSR,
|
||||
show_engine2_leds, store_engine2_leds);
|
||||
static DEVICE_ATTR(engine3_leds, S_IRUGO | S_IWUSR,
|
||||
show_engine3_leds, store_engine3_leds);
|
||||
static DEVICE_ATTR(engine1_load, S_IWUSR, NULL, store_engine1_load);
|
||||
static DEVICE_ATTR(engine2_load, S_IWUSR, NULL, store_engine2_load);
|
||||
static DEVICE_ATTR(engine3_load, S_IWUSR, NULL, store_engine3_load);
|
||||
static DEVICE_ATTR(selftest, S_IRUGO, lp5523_selftest, NULL);
|
||||
|
||||
static struct attribute *lp5523_attributes[] = {
|
||||
&dev_attr_engine1_mode.attr,
|
||||
&dev_attr_engine2_mode.attr,
|
||||
&dev_attr_engine3_mode.attr,
|
||||
&dev_attr_selftest.attr,
|
||||
&dev_attr_engine1_load.attr,
|
||||
&dev_attr_engine1_leds.attr,
|
||||
&dev_attr_engine2_load.attr,
|
||||
&dev_attr_engine2_leds.attr,
|
||||
&dev_attr_engine3_load.attr,
|
||||
&dev_attr_engine3_leds.attr,
|
||||
NULL,
|
||||
};
|
||||
|
||||
@ -664,36 +503,6 @@ static void lp5523_unregister_sysfs(struct i2c_client *client)
|
||||
sysfs_remove_group(&dev->kobj, &lp5523_group);
|
||||
}
|
||||
|
||||
/*--------------------------------------------------------------*/
|
||||
/* Set chip operating mode */
|
||||
/*--------------------------------------------------------------*/
|
||||
static void lp5523_set_mode(struct lp5523_engine *engine, u8 mode)
|
||||
{
|
||||
/* if in that mode already do nothing, except for run */
|
||||
if (mode == engine->mode && mode != LP5523_CMD_RUN)
|
||||
return;
|
||||
|
||||
switch (mode) {
|
||||
case LP5523_CMD_RUN:
|
||||
lp5523_run_program(engine);
|
||||
break;
|
||||
case LP5523_CMD_LOAD:
|
||||
lp5523_set_engine_mode(engine, LP5523_CMD_DISABLED);
|
||||
lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
|
||||
break;
|
||||
case LP5523_CMD_DISABLED:
|
||||
lp5523_set_engine_mode(engine, LP5523_CMD_DISABLED);
|
||||
break;
|
||||
default:
|
||||
return;
|
||||
}
|
||||
|
||||
engine->mode = mode;
|
||||
}
|
||||
|
||||
/*--------------------------------------------------------------*/
|
||||
/* Probe, Attach, Remove */
|
||||
/*--------------------------------------------------------------*/
|
||||
/* Chip specific configurations */
|
||||
static struct lp55xx_device_config lp5523_cfg = {
|
||||
.reset = {
|
||||
@ -708,6 +517,8 @@ static struct lp55xx_device_config lp5523_cfg = {
|
||||
.post_init_device = lp5523_post_init_device,
|
||||
.brightness_work_fn = lp5523_led_brightness_work,
|
||||
.set_led_current = lp5523_set_led_current,
|
||||
.firmware_cb = lp5523_firmware_loaded,
|
||||
.run_engine = lp5523_run_engine,
|
||||
};
|
||||
|
||||
static int lp5523_probe(struct i2c_client *client,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user