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Chris Nutter committed 2023-07-08 13:03:17 -07:00
commit 1bf4efd552
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drivers/display_pmu/beryllium/beryllium.c
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/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
*
* This document is the property of Apple Inc.
* It is considered confidential and proprietary.
*
* This document may not be reproduced or transmitted in any form,
* in whole or in part, without the express written permission of
* Apple Inc.
*/
#include <debug.h>
#include <drivers/iic.h>
#include <drivers/display_pmu.h>
#include <lib/devicetree.h>
#include <sys/task.h>
#include <target/gpiodef.h>
#include <target.h>
#define IIC_ADDRESS (0xEE)
#define ADDR_0x08 (0x08)
#define ADDR_0x15 (0x15)
#define ADDR_0x16 (0x16)
#define ADDR_0x17 (0x17)
static bool beryllium_supported;
static uint8_t beryllium_ldo_voltage; // LDO voltage encoding read from Panel
static uint8_t beryllium_boost_voltage; // Boost voltage encoding read from Panel
static bool beryllium_use_updated_voltages; // Set if LDO and Boost voltage override exists
int display_pmu_init(void)
{
uint8_t data[2];
extern bool ipod6_is_beryllium_supported();
if((beryllium_supported = ipod6_is_beryllium_supported()) == false)
goto exit;
#if WITH_HW_DISPLAY_SUMMIT
extern int8_t summit_get_raw_panel_id(uint8_t *raw_panel_id, size_t raw_panel_id_length);
uint8_t raw_panel_id[15];
summit_get_raw_panel_id(raw_panel_id, sizeof(raw_panel_id));
beryllium_ldo_voltage = raw_panel_id[4];
beryllium_boost_voltage = raw_panel_id[5];
beryllium_use_updated_voltages = true;
#endif
// clear AUTO_RESTART bit
// <rdar://problem/15928326> n27a: Beryllium OTP setting for AUTO_RESTART bit is set wrong
data[0] = ADDR_0x15;
RELEASE_ASSERT(iic_read(DISPLAY_PMU_IIC_BUS, IIC_ADDRESS, (const void *)data, 1, (void *)(data + 1), 1, IIC_NORMAL) == 0);
data[1] &= ~(1 << 0);
RELEASE_ASSERT(iic_write(DISPLAY_PMU_IIC_BUS, IIC_ADDRESS, data, 2) == 0);
// clear SHDN bit, this will cause chip to enter IDLE mode after OTP read
data[0] = ADDR_0x08;
data[1] = 0;
RELEASE_ASSERT(iic_write(DISPLAY_PMU_IIC_BUS, IIC_ADDRESS, data, 2) == 0);
// wait 2ms
task_sleep(2);
if (beryllium_use_updated_voltages) {
// set LDO voltage
data[0] = ADDR_0x16;
data[1] = beryllium_ldo_voltage;
RELEASE_ASSERT(iic_write(DISPLAY_PMU_IIC_BUS, IIC_ADDRESS, data, 2) == 0);
// set Boost voltage
data[0] = ADDR_0x17;
data[1] = beryllium_boost_voltage;
RELEASE_ASSERT(iic_write(DISPLAY_PMU_IIC_BUS, IIC_ADDRESS, data, 2) == 0);
}
exit:
return 0;
}
int display_pmu_quiesce(void)
{
uint8_t data[2];
if (beryllium_supported == false)
goto exit;
// set SHDN bit, this will cause chip to go back into shutdown mode
data[0] = ADDR_0x08;
data[1] = 1;
RELEASE_ASSERT(iic_write(DISPLAY_PMU_IIC_BUS, IIC_ADDRESS, data, 2) == 0);
exit:
return 0;
}
#if WITH_DEVICETREE
void display_pmu_update_device_tree(const char *node_string)
{
uint32_t propSize;
char *propName;
void *propData;
DTNode *node;
// Find display-pmu node
if (FindNode(0, node_string, &node)) {
if (beryllium_supported && beryllium_use_updated_voltages) {
propName = "ldo-voltage";
if (FindProperty(node, &propName, &propData, &propSize))
if (propSize >= sizeof(beryllium_ldo_voltage))
*(uint32_t *)propData = beryllium_ldo_voltage;
propName = "boost-voltage";
if (FindProperty(node, &propName, &propData, &propSize))
if (propSize >= sizeof(beryllium_boost_voltage))
*(uint32_t *)propData = beryllium_boost_voltage;
}
else if (!beryllium_supported) {
propName = "not-supported";
if (FindProperty(node, &propName, &propData, &propSize))
if (propSize >= sizeof(bool))
*(bool *)propData = true;
}
}
}
#endif
drivers/display_pmu/beryllium/rules.mk
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# Copyright (C) 2013 Apple Inc. All rights reserved.
#
# This document is the property of Apple Inc.
# It is considered confidential and proprietary.
#
# This document may not be reproduced or transmitted in any form,
# in whole or in part, without the express written permission of
# Apple Inc.
#
LOCAL_DIR := $(GET_LOCAL_DIR)
OPTIONS += \
WITH_HW_DISPLAY_PMU=1 \
WITH_HW_BERYLLIUM=1
ALL_OBJS += \
$(LOCAL_DIR)/beryllium.o
drivers/display_pmu/chestnut/chestnut.c
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/*
* Copyright (C) 2012-2013 Apple Inc. All rights reserved.
*
* This document is the property of Apple Inc.
* It is considered confidential and proprietary.
*
* This document may not be reproduced or transmitted in any form,
* in whole or in part, without the express written permission of
* Apple Inc.
*/
#include <debug.h>
#include <drivers/iic.h>
#include <drivers/display_pmu.h>
#include <lib/devicetree.h>
#include <target/gpiodef.h>
#include <target.h>
#define IIC_ADDRESS (0x4E)
#define DEVICE_ID_0 (0x00)
#define DEVICE_ID_1 (0x01)
#define DEVICE_ID_2 (0x02)
#define REVISION (0x03)
#define STATUS (0x04)
#define ENABLE (0x05)
#define VNEG_CONTROL (0x0F)
#define TI_DEVICE_ID0 (0x007365)
#define TI_DEVICE_ID1 (0x00F365)
#define INTERSIL_DEVICE_ID (0x0BA46E)
uint32_t chestnut_device_id;
uint8_t chestnut_device_revision;
bool chestnut_probed;
bool chestnut_present;
static const char *chestnut_device_string(uint32_t device_id)
{
switch (device_id) {
case TI_DEVICE_ID0:
case TI_DEVICE_ID1:
return "TI";
case INTERSIL_DEVICE_ID:
return "Intersil";
}
return "Unknown";
}
static void chestnut_probe()
{
if (!chestnut_probed) {
// Probe by reading a register
uint8_t data[4] = { 0 };
data[0] = REVISION;
if (iic_read(DISPLAY_PMU_IIC_BUS, IIC_ADDRESS, (const void *)data, 1, (void *)(data + 1), 1, IIC_NORMAL) == 0) {
chestnut_device_revision = data[1];
data[0] = DEVICE_ID_0;
if (iic_read(DISPLAY_PMU_IIC_BUS, IIC_ADDRESS, (const void *)data, 1, (void *)(data + 1), 3, IIC_NORMAL) == 0)
chestnut_device_id = (data[1] << 16) | (data[2] << 8) | data[3];
chestnut_present = true;
}
chestnut_probed = true;
}
if (chestnut_present)
dprintf(DEBUG_CRITICAL, "Display PMU found, 0x%08x, %s-%02x\n", chestnut_device_id, chestnut_device_string(chestnut_device_id), chestnut_device_revision);
else
dprintf(DEBUG_INFO, "Display PMU probe failed\n");
}
#if TARGET_CHESTNUT_USE_LOW_RIPPLE_MODE && !defined(TARGET_CHESTNUT_VNEG_CONTROL)
#define TARGET_CHESTNUT_VNEG_CONTROL 0x07
#endif
int display_pmu_init(void)
{
chestnut_probe();
if (chestnut_present) {
uint8_t data[2];
#if defined(TARGET_CHESTNUT_VNEG_CONTROL)
// Set low-ripple mode for VNEG
// <rdar://problem/12983634> N5x | Set low-ripple mode in Chestnut before Chestnut rails are enabled
data[0] = VNEG_CONTROL;
data[1] = TARGET_CHESTNUT_VNEG_CONTROL;
RELEASE_ASSERT(iic_write(DISPLAY_PMU_IIC_BUS, IIC_ADDRESS, data, 2) == 0);
#endif
// Enable power to the panel
data[0] = ENABLE;
data[1] = 0x3; // Enable Boost (VNEG and VPOS LDOs)
data[1] |= target_get_lcm_ldos();
RELEASE_ASSERT(iic_write(DISPLAY_PMU_IIC_BUS, IIC_ADDRESS, data, 2) == 0);
return 0;
}
return -1;
}
int display_pmu_quiesce(void)
{
if (chestnut_present) {
uint8_t data[2];
// Disable power to the panel
data[0] = ENABLE;
data[1] = 0;
RELEASE_ASSERT(iic_write(DISPLAY_PMU_IIC_BUS, IIC_ADDRESS, data, 2) == 0);
return 0;
}
return -1;
}
#if WITH_DEVICETREE
void display_pmu_update_device_tree(const char *node_string)
{
uint32_t propSize;
char *propName;
void *propData;
DTNode *node;
if (!chestnut_present)
return;
// Find display-pmu node
if (FindNode(0, node_string, &node)) {
// Fill in the probed device info
propName = "device-id";
if (FindProperty(node, &propName, &propData, &propSize))
if (propSize >= sizeof(chestnut_device_id))
*(uint32_t *)propData = chestnut_device_id;
propName = "device-revision";
if (FindProperty(node, &propName, &propData, &propSize))
if (propSize >= sizeof(chestnut_device_revision))
*(uint32_t *)propData = chestnut_device_revision;
propName = "device-string";
if (FindProperty(node, &propName, &propData, &propSize)) {
bzero(propData, propSize);
strlcpy(propData, chestnut_device_string(chestnut_device_id), propSize);
}
}
}
#endif
drivers/display_pmu/chestnut/rules.mk
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# Copyright (C) 2012 Apple Inc. All rights reserved.
#
# This document is the property of Apple Inc.
# It is considered confidential and proprietary.
#
# This document may not be reproduced or transmitted in any form,
# in whole or in part, without the express written permission of
# Apple Inc.
#
LOCAL_DIR := $(GET_LOCAL_DIR)
OPTIONS += \
WITH_HW_DISPLAY_PMU=1 \
WITH_HW_CHESTNUT=1
ALL_OBJS += \
$(LOCAL_DIR)/chestnut.o