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https://github.com/Telecominfraproject/OpenCellular.git
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13b555dc63
In preparation for Proto 6 board support which won't be backward compatible, fork the EC for Proto 4 and Proto 5 for people who need to support older boards. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> BRANCH=none BUG=chrome-os-partner:39202 TEST=make buildall Change-Id: I520bbf146cc1c1dc04e55283be57807ec19ebaa1 Reviewed-on: https://chromium-review.googlesource.com/266064 Reviewed-by: Alec Berg <alecaberg@chromium.org> Reviewed-by: Gwendal Grignou <gwendal@chromium.org> Tested-by: Vincent Palatin <vpalatin@chromium.org> Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
261 lines
7.7 KiB
C
261 lines
7.7 KiB
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Lightbar IC interface
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*/
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#include "common.h"
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#include "console.h"
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#include "ec_commands.h"
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#include "i2c.h"
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#include "lb_common.h"
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#include "util.h"
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/* Console output macros */
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#define CPUTS(outstr) cputs(CC_LIGHTBAR, outstr)
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#define CPRINTS(format, args...) cprints(CC_LIGHTBAR, format, ## args)
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/******************************************************************************/
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/* How to talk to the controller */
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/******************************************************************************/
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/* Since there's absolutely nothing we can do about it if an I2C access
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* isn't working, we're completely ignoring any failures. */
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static const uint8_t i2c_addr[] = { 0x54, 0x56 };
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static inline void controller_write(int ctrl_num, uint8_t reg, uint8_t val)
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{
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ctrl_num = ctrl_num % ARRAY_SIZE(i2c_addr);
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i2c_write8(I2C_PORT_LIGHTBAR, i2c_addr[ctrl_num], reg, val);
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}
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static inline uint8_t controller_read(int ctrl_num, uint8_t reg)
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{
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int val = 0;
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ctrl_num = ctrl_num % ARRAY_SIZE(i2c_addr);
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i2c_read8(I2C_PORT_LIGHTBAR, i2c_addr[ctrl_num], reg, &val);
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return val;
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}
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/******************************************************************************/
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/* Controller details. We have an ADP8861 and and ADP8863, but we can treat
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* them identically for our purposes */
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/******************************************************************************/
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#ifdef BOARD_BDS
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/* We need to limit the total current per ISC to no more than 20mA (5mA per
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* color LED, but we have four LEDs in parallel on each ISC). Any more than
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* that runs the risk of damaging the LED component. A value of 0x67 is as high
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* as we want (assuming Square Law), but the blue LED is the least bright, so
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* I've lowered the other colors until they all appear approximately equal
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* brightness when full on. That's still pretty bright and a lot of current
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* drain on the battery, so we'll probably rarely go that high. */
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#define MAX_RED 0x5c
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#define MAX_GREEN 0x30
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#define MAX_BLUE 0x67
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#endif
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#ifdef BOARD_LINK
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/* Link uses seven segments, not four, but keep the same limits anyway */
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#define MAX_RED 0x5c
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#define MAX_GREEN 0x30
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#define MAX_BLUE 0x67
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#endif
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#if defined(BOARD_SAMUS) || defined(BOARD_RYU) || defined(BOARD_RYU_P4P5)
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/* Samus uses completely different LEDs, so the numbers are different. The
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* Samus LEDs can handle much higher currents, but these constants were
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* calibrated to provide uniform intensity at the level used by Link.
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* See crosbug.com/p/33017 before making any changes. */
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#define MAX_RED 0x34
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#define MAX_GREEN 0x2c
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#define MAX_BLUE 0x40
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#endif
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#ifdef BOARD_HOST
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/* For testing only */
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#define MAX_RED 0xff
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#define MAX_GREEN 0xff
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#define MAX_BLUE 0xff
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#endif
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/* How we'd like to see the driver chips initialized. The controllers have some
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* auto-cycling capability, but it's not much use for our purposes. For now,
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* we'll just control all color changes actively. */
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struct initdata_s {
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uint8_t reg;
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uint8_t val;
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};
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static const struct initdata_s init_vals[] = {
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{0x04, 0x00}, /* no backlight function */
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{0x05, 0x3f}, /* xRGBRGB per chip */
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{0x0f, 0x01}, /* square law looks better */
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{0x10, 0x3f}, /* enable independent LEDs */
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{0x11, 0x00}, /* no auto cycling */
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{0x12, 0x00}, /* no auto cycling */
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{0x13, 0x00}, /* instant fade in/out */
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{0x14, 0x00}, /* not using LED 7 */
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{0x15, 0x00}, /* current for LED 6 (blue) */
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{0x16, 0x00}, /* current for LED 5 (red) */
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{0x17, 0x00}, /* current for LED 4 (green) */
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{0x18, 0x00}, /* current for LED 3 (blue) */
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{0x19, 0x00}, /* current for LED 2 (red) */
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{0x1a, 0x00}, /* current for LED 1 (green) */
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};
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static void set_from_array(const struct initdata_s *data, int count)
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{
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int i;
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for (i = 0; i < count; i++) {
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controller_write(0, data[i].reg, data[i].val);
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controller_write(1, data[i].reg, data[i].val);
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}
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}
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/* Controller register lookup tables. */
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static const uint8_t led_to_ctrl[] = { 1, 1, 0, 0 };
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#ifdef BOARD_BDS
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static const uint8_t led_to_isc[] = { 0x18, 0x15, 0x18, 0x15 };
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#endif
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#ifdef BOARD_LINK
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static const uint8_t led_to_isc[] = { 0x18, 0x15, 0x18, 0x15 };
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#endif
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#ifdef BOARD_SAMUS
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static const uint8_t led_to_isc[] = { 0x15, 0x18, 0x15, 0x18 };
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#endif
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#if defined(BOARD_RYU) || defined(BOARD_RYU_P4P5)
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static const uint8_t led_to_isc[] = { 0x18, 0x15, 0x18, 0x15 };
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#endif
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#ifdef BOARD_HOST
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/* For testing only */
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static const uint8_t led_to_isc[] = { 0x15, 0x18, 0x15, 0x18 };
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#endif
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/* Scale 0-255 into max value */
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static inline uint8_t scale_abs(int val, int max)
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{
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return (val * max)/255;
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}
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/* This is the overall brightness control. */
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static int brightness = 0xc0;
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/* So that we can make brightness changes happen instantly, we need to track
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* the current values. The values in the controllers aren't very helpful. */
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static uint8_t current[NUM_LEDS][3];
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/* Scale 0-255 by brightness */
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static inline uint8_t scale(int val, int max)
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{
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return scale_abs((val * brightness)/255, max);
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}
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/* Helper function to set one LED color and remember it for later */
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static void setrgb(int led, int red, int green, int blue)
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{
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int ctrl, bank;
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current[led][0] = red;
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current[led][1] = green;
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current[led][2] = blue;
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ctrl = led_to_ctrl[led];
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bank = led_to_isc[led];
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controller_write(ctrl, bank, scale(blue, MAX_BLUE));
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controller_write(ctrl, bank+1, scale(red, MAX_RED));
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controller_write(ctrl, bank+2, scale(green, MAX_GREEN));
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}
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/* LEDs are numbered 0-3, RGB values should be in 0-255.
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* If you specify too large an LED, it sets them all. */
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void lb_set_rgb(unsigned int led, int red, int green, int blue)
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{
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int i;
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if (led >= NUM_LEDS)
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for (i = 0; i < NUM_LEDS; i++)
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setrgb(i, red, green, blue);
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else
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setrgb(led, red, green, blue);
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}
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/* Get current LED values, if the LED number is in range. */
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int lb_get_rgb(unsigned int led, uint8_t *red, uint8_t *green, uint8_t *blue)
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{
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if (led < 0 || led >= NUM_LEDS)
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return EC_RES_INVALID_PARAM;
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*red = current[led][0];
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*green = current[led][1];
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*blue = current[led][2];
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return EC_RES_SUCCESS;
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}
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/* Change current display brightness (0-255) */
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void lb_set_brightness(unsigned int newval)
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{
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int i;
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CPRINTS("LB_bright 0x%02x", newval);
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brightness = newval;
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for (i = 0; i < NUM_LEDS; i++)
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setrgb(i, current[i][0], current[i][1], current[i][2]);
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}
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/* Get current display brightness (0-255) */
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uint8_t lb_get_brightness(void)
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{
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return brightness;
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}
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/* Initialize the controller ICs after reset */
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void lb_init(void)
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{
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CPRINTS("LB_init_vals");
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set_from_array(init_vals, ARRAY_SIZE(init_vals));
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memset(current, 0, sizeof(current));
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}
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/* Just go into standby mode. No register values should change. */
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void lb_off(void)
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{
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CPRINTS("LB_off");
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controller_write(0, 0x01, 0x00);
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controller_write(1, 0x01, 0x00);
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}
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/* Come out of standby mode. */
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void lb_on(void)
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{
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CPRINTS("LB_on");
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controller_write(0, 0x01, 0x20);
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controller_write(1, 0x01, 0x20);
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}
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static const uint8_t dump_reglist[] = {
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
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0x08, 0x09, 0x0a, 0x0f,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
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0x18, 0x19, 0x1a
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};
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/* Helper for host command to dump controller registers */
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void lb_hc_cmd_dump(struct ec_response_lightbar *out)
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{
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int i;
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uint8_t reg;
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BUILD_ASSERT(ARRAY_SIZE(dump_reglist) ==
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ARRAY_SIZE(out->dump.vals));
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for (i = 0; i < ARRAY_SIZE(dump_reglist); i++) {
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reg = dump_reglist[i];
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out->dump.vals[i].reg = reg;
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out->dump.vals[i].ic0 = controller_read(0, reg);
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out->dump.vals[i].ic1 = controller_read(1, reg);
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}
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}
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/* Helper for host command to write controller registers directly */
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void lb_hc_cmd_reg(const struct ec_params_lightbar *in)
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{
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controller_write(in->reg.ctrl, in->reg.reg, in->reg.value);
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}
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