545 lines
14 KiB
C
545 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2024 Christian Marangi <ansuelsmth@gmail.com>
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*/
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#include <linux/bitfield.h>
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#include <linux/cleanup.h>
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#include <linux/delay.h>
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#include <linux/firmware.h>
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#include <linux/i2c.h>
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#include <linux/iopoll.h>
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#include <linux/leds.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <linux/platform_data/leds-lp55xx.h>
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#include <linux/slab.h>
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#include <dt-bindings/leds/leds-lp55xx.h>
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#include "leds-lp55xx-common.h"
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#define LP5569_MAX_LEDS 9
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/* Memory is used like this:
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* 0x00 engine 1 program (4 pages)
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* 0x40 engine 2 program (4 pages)
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* 0x80 engine 3 program (4 pages)
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* 0xc0 engine 1 muxing info (1 page)
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* 0xd0 engine 2 muxing info (1 page)
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* 0xe0 engine 3 muxing info (1 page)
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*/
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#define LP5569_PAGES_PER_ENGINE 4
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#define LP5569_REG_ENABLE 0x00
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#define LP5569_ENABLE BIT(6)
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#define LP5569_REG_EXEC_CTRL 0x01
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#define LP5569_MODE_ENG_SHIFT 2
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#define LP5569_REG_OP_MODE 0x02
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#define LP5569_EXEC_ENG_SHIFT 2
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#define LP5569_REG_ENABLE_LEDS_MSB 0x04
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#define LP5569_REG_ENABLE_LEDS_LSB 0x05
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#define LP5569_REG_LED_CTRL_BASE 0x07
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#define LP5569_FADER_MAPPING_MASK GENMASK(7, 5)
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#define LP5569_REG_LED_PWM_BASE 0x16
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#define LP5569_REG_LED_CURRENT_BASE 0x22
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#define LP5569_REG_MISC 0x2F
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#define LP5569_AUTO_INC BIT(6)
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#define LP5569_PWR_SAVE BIT(5)
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#define LP5569_CP_MODE_MASK GENMASK(4, 3)
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#define LP5569_PWM_PWR_SAVE BIT(2)
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#define LP5569_INTERNAL_CLK BIT(0)
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#define LP5569_REG_MISC2 0x33
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#define LP5569_LED_SHORT_TEST BIT(4)
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#define LP5569_LED_OPEN_TEST BIT(3)
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#define LP5569_REG_STATUS 0x3C
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#define LP5569_MASK_BUSY BIT(7)
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#define LP5569_STARTUP_BUSY BIT(6)
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#define LP5569_ENGINE_BUSY BIT(5)
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#define LP5569_ENGINE1_INT BIT(2)
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#define LP5569_ENGINE2_INT BIT(1)
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#define LP5569_ENGINE3_INT BIT(0)
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#define LP5569_ENG_STATUS_MASK (LP5569_ENGINE1_INT | LP5569_ENGINE2_INT | \
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LP5569_ENGINE3_INT)
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#define LP5569_REG_IO_CONTROL 0x3D
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#define LP5569_CLK_OUTPUT BIT(3)
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#define LP5569_REG_RESET 0x3F
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#define LP5569_RESET 0xFF
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#define LP5569_REG_MASTER_FADER_BASE 0x46
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#define LP5569_REG_CH1_PROG_START 0x4B
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#define LP5569_REG_CH2_PROG_START 0x4C
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#define LP5569_REG_CH3_PROG_START 0x4D
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#define LP5569_REG_PROG_PAGE_SEL 0x4F
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#define LP5569_REG_PROG_MEM 0x50
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#define LP5569_REG_LED_FAULT1 0x81
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#define LP5569_LED_FAULT8 BIT(0)
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#define LP5569_REG_LED_FAULT2 0x82
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#define LP5569_LED_FAULT7 BIT(7)
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#define LP5569_LED_FAULT6 BIT(6)
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#define LP5569_LED_FAULT5 BIT(5)
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#define LP5569_LED_FAULT4 BIT(4)
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#define LP5569_LED_FAULT3 BIT(3)
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#define LP5569_LED_FAULT2 BIT(2)
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#define LP5569_LED_FAULT1 BIT(1)
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#define LP5569_LED_FAULT0 BIT(0)
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#define LP5569_ENG1_PROG_ADDR 0x0
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#define LP5569_ENG2_PROG_ADDR 0x40
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#define LP5569_ENG3_PROG_ADDR 0x80
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#define LP5569_ENG1_MUX_ADDR 0xc0
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#define LP5569_ENG2_MUX_ADDR 0xd0
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#define LP5569_ENG3_MUX_ADDR 0xe0
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#define LP5569_STARTUP_SLEEP 500
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#define LEDn_STATUS_FAULT(n, status) ((status) >> (n) & BIT(0))
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#define LP5569_DEFAULT_CONFIG \
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(LP5569_AUTO_INC | LP5569_PWR_SAVE | LP5569_PWM_PWR_SAVE)
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static void lp5569_run_engine(struct lp55xx_chip *chip, bool start)
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{
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if (!start) {
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lp55xx_stop_engine(chip);
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lp55xx_turn_off_channels(chip);
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return;
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}
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lp55xx_run_engine_common(chip);
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}
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static int lp5569_init_program_engine(struct lp55xx_chip *chip)
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{
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int i;
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int j;
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int ret;
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u8 status;
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/* Precompiled pattern per ENGINE setting LED MUX start and stop addresses */
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static const u8 pattern[][LP55xx_BYTES_PER_PAGE] = {
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{ 0x9c, LP5569_ENG1_MUX_ADDR, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0},
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{ 0x9c, LP5569_ENG2_MUX_ADDR, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0},
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{ 0x9c, LP5569_ENG3_MUX_ADDR, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0},
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};
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/* Setup each ENGINE program start address */
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ret = lp55xx_write(chip, LP5569_REG_CH1_PROG_START, LP5569_ENG1_PROG_ADDR);
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if (ret)
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return ret;
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ret = lp55xx_write(chip, LP5569_REG_CH2_PROG_START, LP5569_ENG2_PROG_ADDR);
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if (ret)
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return ret;
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ret = lp55xx_write(chip, LP5569_REG_CH3_PROG_START, LP5569_ENG3_PROG_ADDR);
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if (ret)
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return ret;
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/* Write precompiled pattern for LED MUX address space for each ENGINE */
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for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) {
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chip->engine_idx = i;
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lp55xx_load_engine(chip);
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for (j = 0; j < LP55xx_BYTES_PER_PAGE; j++) {
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ret = lp55xx_write(chip, LP5569_REG_PROG_MEM + j,
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pattern[i - 1][j]);
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if (ret)
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goto out;
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}
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}
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lp5569_run_engine(chip, true);
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/* Let the programs run for couple of ms and check the engine status */
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usleep_range(3000, 6000);
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lp55xx_read(chip, LP5569_REG_STATUS, &status);
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status = FIELD_GET(LP5569_ENG_STATUS_MASK, status);
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if (status != LP5569_ENG_STATUS_MASK) {
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dev_err(&chip->cl->dev,
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"could not configure LED engine, status = 0x%.2x\n",
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status);
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ret = -EINVAL;
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}
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out:
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lp55xx_stop_all_engine(chip);
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return ret;
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}
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static int lp5569_post_init_device(struct lp55xx_chip *chip)
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{
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int ret;
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u8 val;
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val = LP5569_DEFAULT_CONFIG;
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val |= FIELD_PREP(LP5569_CP_MODE_MASK, chip->pdata->charge_pump_mode);
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ret = lp55xx_write(chip, LP5569_REG_MISC, val);
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if (ret)
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return ret;
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if (chip->pdata->clock_mode == LP55XX_CLOCK_INT) {
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/* Internal clock MUST be configured before CLK output */
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ret = lp55xx_update_bits(chip, LP5569_REG_MISC,
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LP5569_INTERNAL_CLK,
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LP5569_INTERNAL_CLK);
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if (ret)
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return ret;
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ret = lp55xx_update_bits(chip, LP5569_REG_IO_CONTROL,
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LP5569_CLK_OUTPUT,
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LP5569_CLK_OUTPUT);
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if (ret)
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return ret;
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}
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ret = lp55xx_write(chip, LP5569_REG_ENABLE, LP5569_ENABLE);
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if (ret)
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return ret;
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read_poll_timeout(lp55xx_read, ret, !(val & LP5569_STARTUP_BUSY),
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LP5569_STARTUP_SLEEP, LP5569_STARTUP_SLEEP * 10, false,
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chip, LP5569_REG_STATUS, &val);
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return lp5569_init_program_engine(chip);
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}
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static ssize_t lp5569_led_open_test(struct lp55xx_led *led, char *buf)
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{
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struct lp55xx_chip *chip = led->chip;
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struct lp55xx_platform_data *pdata = chip->pdata;
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bool leds_fault[LP5569_MAX_LEDS];
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struct lp55xx_led *led_tmp = led;
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int i, ret, pos = 0;
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u8 status;
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/* Set in STANDBY state */
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ret = lp55xx_write(chip, LP5569_REG_ENABLE, 0);
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if (ret)
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goto exit;
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/* Wait 1ms for device to enter STANDBY state */
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usleep_range(1000, 2000);
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/* Set Charge Pump to 1.5x */
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ret = lp55xx_update_bits(chip, LP5569_REG_MISC,
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FIELD_PREP(LP5569_CP_MODE_MASK, LP55XX_CP_BOOST),
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LP5569_CP_MODE_MASK);
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if (ret)
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goto exit;
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/* Enable LED Open Test */
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ret = lp55xx_update_bits(chip, LP5569_REG_MISC2, LP5569_LED_OPEN_TEST,
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LP5569_LED_OPEN_TEST);
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if (ret)
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goto exit;
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/* Put Device in NORMAL state */
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ret = lp55xx_write(chip, LP5569_REG_ENABLE, LP5569_ENABLE);
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if (ret)
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goto exit;
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/* Wait 500 us for device to enter NORMAL state */
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usleep_range(500, 750);
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/* Enable LED and set to 100% brightness */
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for (i = 0; i < pdata->num_channels; i++) {
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ret = lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led_tmp->chan_nr,
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LED_FULL);
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if (ret)
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goto exit;
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led_tmp++;
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}
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/* Wait 500 us for device to fill status regs */
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usleep_range(500, 750);
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/* Parse status led fault 1 regs */
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ret = lp55xx_read(chip, LP5569_REG_LED_FAULT1, &status);
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if (ret < 0)
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goto exit;
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for (i = 0; i < 8; i++)
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leds_fault[i] = !!((status >> i) & 0x1);
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/* Parse status led fault 2 regs */
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ret = lp55xx_read(chip, LP5569_REG_LED_FAULT2, &status);
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if (ret < 0)
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goto exit;
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for (i = 0; i < 1; i++)
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leds_fault[i + 8] = !!((status >> i) & 0x1);
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/* Report LED fault */
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led_tmp = led;
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for (i = 0; i < pdata->num_channels; i++) {
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if (leds_fault[led_tmp->chan_nr])
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pos += sysfs_emit_at(buf, pos, "LED %d OPEN FAIL\n",
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led_tmp->chan_nr);
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led_tmp++;
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}
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ret = pos;
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exit:
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/* Disable LED Open Test */
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lp55xx_update_bits(chip, LP5569_REG_MISC2, LP5569_LED_OPEN_TEST, 0);
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led_tmp = led;
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for (i = 0; i < pdata->num_channels; i++) {
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lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led_tmp->chan_nr, 0);
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led_tmp++;
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}
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return ret;
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}
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static ssize_t lp5569_led_short_test(struct lp55xx_led *led, char *buf)
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{
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struct lp55xx_chip *chip = led->chip;
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struct lp55xx_platform_data *pdata = chip->pdata;
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bool leds_fault[LP5569_MAX_LEDS];
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struct lp55xx_led *led_tmp = led;
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int i, ret, pos = 0;
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u8 status;
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/* Set in STANDBY state */
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ret = lp55xx_write(chip, LP5569_REG_ENABLE, 0);
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if (ret)
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goto exit;
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/* Wait 1ms for device to enter STANDBY state */
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usleep_range(1000, 2000);
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/* Set Charge Pump to 1x */
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ret = lp55xx_update_bits(chip, LP5569_REG_MISC,
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FIELD_PREP(LP5569_CP_MODE_MASK, LP55XX_CP_BYPASS),
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LP5569_CP_MODE_MASK);
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if (ret)
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goto exit;
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/* Enable LED and set to 100% brightness and current to 100% (25.5mA) */
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for (i = 0; i < pdata->num_channels; i++) {
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ret = lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led_tmp->chan_nr,
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LED_FULL);
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if (ret)
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goto exit;
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ret = lp55xx_write(chip, LP5569_REG_LED_CURRENT_BASE + led_tmp->chan_nr,
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LED_FULL);
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if (ret)
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goto exit;
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led_tmp++;
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}
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/* Put Device in NORMAL state */
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ret = lp55xx_write(chip, LP5569_REG_ENABLE, LP5569_ENABLE);
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if (ret)
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goto exit;
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/* Wait 500 us for device to enter NORMAL state */
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usleep_range(500, 750);
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/* Enable LED Shorted Test */
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ret = lp55xx_update_bits(chip, LP5569_REG_MISC2, LP5569_LED_OPEN_TEST,
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LP5569_LED_SHORT_TEST);
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if (ret)
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goto exit;
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/* Wait 500 us for device to fill status regs */
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usleep_range(500, 750);
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/* Parse status led fault 1 regs */
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ret = lp55xx_read(chip, LP5569_REG_LED_FAULT1, &status);
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if (ret < 0)
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goto exit;
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for (i = 0; i < 8; i++)
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leds_fault[i] = !!LEDn_STATUS_FAULT(i, status);
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/* Parse status led fault 2 regs */
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ret = lp55xx_read(chip, LP5569_REG_LED_FAULT2, &status);
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if (ret < 0)
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goto exit;
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for (i = 0; i < 1; i++)
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leds_fault[i + 8] = !!LEDn_STATUS_FAULT(i, status);
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/* Report LED fault */
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led_tmp = led;
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for (i = 0; i < pdata->num_channels; i++) {
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if (leds_fault[led_tmp->chan_nr])
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pos += sysfs_emit_at(buf, pos, "LED %d SHORTED FAIL\n",
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led_tmp->chan_nr);
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led_tmp++;
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}
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ret = pos;
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exit:
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/* Disable LED Shorted Test */
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lp55xx_update_bits(chip, LP5569_REG_MISC2, LP5569_LED_SHORT_TEST, 0);
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led_tmp = led;
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for (i = 0; i < pdata->num_channels; i++) {
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lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led_tmp->chan_nr, 0);
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led_tmp++;
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}
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return ret;
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}
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static ssize_t lp5569_selftest(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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struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
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struct lp55xx_chip *chip = led->chip;
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int i, pos = 0;
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guard(mutex)(&chip->lock);
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/* Test LED Open */
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pos = lp5569_led_open_test(led, buf);
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if (pos < 0)
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return sprintf(buf, "FAIL\n");
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/* Test LED Shorted */
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pos += lp5569_led_short_test(led, buf);
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if (pos < 0)
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return sprintf(buf, "FAIL\n");
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for (i = 0; i < chip->pdata->num_channels; i++) {
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/* Restore current */
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lp55xx_write(chip, LP5569_REG_LED_CURRENT_BASE + led->chan_nr,
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led->led_current);
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/* Restore brightness */
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lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led->chan_nr,
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led->brightness);
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led++;
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}
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return pos == 0 ? sysfs_emit(buf, "OK\n") : pos;
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}
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LP55XX_DEV_ATTR_ENGINE_MODE(1);
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LP55XX_DEV_ATTR_ENGINE_MODE(2);
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LP55XX_DEV_ATTR_ENGINE_MODE(3);
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LP55XX_DEV_ATTR_ENGINE_LEDS(1);
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LP55XX_DEV_ATTR_ENGINE_LEDS(2);
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LP55XX_DEV_ATTR_ENGINE_LEDS(3);
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LP55XX_DEV_ATTR_ENGINE_LOAD(1);
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LP55XX_DEV_ATTR_ENGINE_LOAD(2);
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LP55XX_DEV_ATTR_ENGINE_LOAD(3);
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static LP55XX_DEV_ATTR_RO(selftest, lp5569_selftest);
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LP55XX_DEV_ATTR_MASTER_FADER(1);
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LP55XX_DEV_ATTR_MASTER_FADER(2);
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LP55XX_DEV_ATTR_MASTER_FADER(3);
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static LP55XX_DEV_ATTR_RW(master_fader_leds, lp55xx_show_master_fader_leds,
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lp55xx_store_master_fader_leds);
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static struct attribute *lp5569_attributes[] = {
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&dev_attr_engine1_mode.attr,
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&dev_attr_engine2_mode.attr,
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&dev_attr_engine3_mode.attr,
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&dev_attr_engine1_load.attr,
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&dev_attr_engine2_load.attr,
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&dev_attr_engine3_load.attr,
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&dev_attr_engine1_leds.attr,
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&dev_attr_engine2_leds.attr,
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&dev_attr_engine3_leds.attr,
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&dev_attr_selftest.attr,
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&dev_attr_master_fader1.attr,
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&dev_attr_master_fader2.attr,
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&dev_attr_master_fader3.attr,
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&dev_attr_master_fader_leds.attr,
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NULL,
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|
};
|
|
|
|
static const struct attribute_group lp5569_group = {
|
|
.attrs = lp5569_attributes,
|
|
};
|
|
|
|
/* Chip specific configurations */
|
|
static struct lp55xx_device_config lp5569_cfg = {
|
|
.reg_op_mode = {
|
|
.addr = LP5569_REG_OP_MODE,
|
|
.shift = LP5569_MODE_ENG_SHIFT,
|
|
},
|
|
.reg_exec = {
|
|
.addr = LP5569_REG_EXEC_CTRL,
|
|
.shift = LP5569_EXEC_ENG_SHIFT,
|
|
},
|
|
.reset = {
|
|
.addr = LP5569_REG_RESET,
|
|
.val = LP5569_RESET,
|
|
},
|
|
.enable = {
|
|
.addr = LP5569_REG_ENABLE,
|
|
.val = LP5569_ENABLE,
|
|
},
|
|
.prog_mem_base = {
|
|
.addr = LP5569_REG_PROG_MEM,
|
|
},
|
|
.reg_led_pwm_base = {
|
|
.addr = LP5569_REG_LED_PWM_BASE,
|
|
},
|
|
.reg_led_current_base = {
|
|
.addr = LP5569_REG_LED_CURRENT_BASE,
|
|
},
|
|
.reg_master_fader_base = {
|
|
.addr = LP5569_REG_MASTER_FADER_BASE,
|
|
},
|
|
.reg_led_ctrl_base = {
|
|
.addr = LP5569_REG_LED_CTRL_BASE,
|
|
},
|
|
.pages_per_engine = LP5569_PAGES_PER_ENGINE,
|
|
.max_channel = LP5569_MAX_LEDS,
|
|
.post_init_device = lp5569_post_init_device,
|
|
.brightness_fn = lp55xx_led_brightness,
|
|
.multicolor_brightness_fn = lp55xx_multicolor_brightness,
|
|
.set_led_current = lp55xx_set_led_current,
|
|
.firmware_cb = lp55xx_firmware_loaded_cb,
|
|
.run_engine = lp5569_run_engine,
|
|
.dev_attr_group = &lp5569_group,
|
|
};
|
|
|
|
static const struct i2c_device_id lp5569_id[] = {
|
|
{ "lp5569", .driver_data = (kernel_ulong_t)&lp5569_cfg, },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, lp5569_id);
|
|
|
|
static const struct of_device_id of_lp5569_leds_match[] = {
|
|
{ .compatible = "ti,lp5569", .data = &lp5569_cfg, },
|
|
{},
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, of_lp5569_leds_match);
|
|
|
|
static struct i2c_driver lp5569_driver = {
|
|
.driver = {
|
|
.name = "lp5569",
|
|
.of_match_table = of_lp5569_leds_match,
|
|
},
|
|
.probe = lp55xx_probe,
|
|
.remove = lp55xx_remove,
|
|
.id_table = lp5569_id,
|
|
};
|
|
|
|
module_i2c_driver(lp5569_driver);
|
|
|
|
MODULE_AUTHOR("Christian Marangi <ansuelsmth@gmail.com>");
|
|
MODULE_DESCRIPTION("LP5569 LED engine");
|
|
MODULE_LICENSE("GPL");
|