avionic design with actual uboot and tooling
submodule of avionic design uboot bootloader and with included tools to get you started , read readme.md and readme-tk1-loader.md
This commit is contained in:
322
u-boot/board/egnite/ethernut5/ethernut5_pwrman.c
Normal file
322
u-boot/board/egnite/ethernut5/ethernut5_pwrman.c
Normal file
@@ -0,0 +1,322 @@
|
||||
/*
|
||||
* (C) Copyright 2011
|
||||
* egnite GmbH <info@egnite.de>
|
||||
*
|
||||
* SPDX-License-Identifier: GPL-2.0+
|
||||
*/
|
||||
|
||||
/*
|
||||
* Ethernut 5 power management support
|
||||
*
|
||||
* This board may be supplied via USB, IEEE 802.3af PoE or an
|
||||
* auxiliary DC input. An on-board ATmega168 microcontroller,
|
||||
* the so called power management controller or PMC, is used
|
||||
* to select the supply source and to switch on and off certain
|
||||
* energy consuming board components. This allows to reduce the
|
||||
* total stand-by consumption to less than 70mW.
|
||||
*
|
||||
* The main CPU communicates with the PMC via I2C. When
|
||||
* CONFIG_CMD_BSP is defined in the board configuration file,
|
||||
* then the board specific command 'pwrman' becomes available,
|
||||
* which allows to manually deal with the PMC.
|
||||
*
|
||||
* Two distinct registers are provided by the PMC for enabling
|
||||
* and disabling specific features. This avoids the often seen
|
||||
* read-modify-write cycle or shadow register requirement.
|
||||
* Additional registers are available to query the board
|
||||
* status and temperature, the auxiliary voltage and to control
|
||||
* the green user LED that is integrated in the reset switch.
|
||||
*
|
||||
* Note, that the AVR firmware of the PMC is released under BSDL.
|
||||
*
|
||||
* For additional information visit the project home page at
|
||||
* http://www.ethernut.de/
|
||||
*/
|
||||
#include <common.h>
|
||||
#include <asm/arch/at91sam9260.h>
|
||||
#include <asm/arch/at91_common.h>
|
||||
#include <asm/arch/gpio.h>
|
||||
#include <asm/io.h>
|
||||
#include <i2c.h>
|
||||
|
||||
#include "ethernut5_pwrman.h"
|
||||
|
||||
/* PMC firmware version */
|
||||
static int pwrman_major;
|
||||
static int pwrman_minor;
|
||||
|
||||
/*
|
||||
* Enable Ethernut 5 power management.
|
||||
*
|
||||
* This function must be called during board initialization.
|
||||
* While we are using u-boot's I2C subsystem, it may be required
|
||||
* to enable the serial port before calling this function,
|
||||
* in particular when debugging is enabled.
|
||||
*
|
||||
* If board specific commands are not available, we will activate
|
||||
* all board components.
|
||||
*/
|
||||
void ethernut5_power_init(void)
|
||||
{
|
||||
pwrman_minor = i2c_reg_read(PWRMAN_I2C_ADDR, PWRMAN_REG_VERS);
|
||||
pwrman_major = pwrman_minor >> 4;
|
||||
pwrman_minor &= 15;
|
||||
|
||||
#ifndef CONFIG_CMD_BSP
|
||||
/* Do not modify anything, if we do not have a known version. */
|
||||
if (pwrman_major == 2) {
|
||||
/* Without board specific commands we enable all features. */
|
||||
i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_ENA, ~PWRMAN_ETHRST);
|
||||
i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_DIS, PWRMAN_ETHRST);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
/*
|
||||
* Reset Ethernet PHY.
|
||||
*
|
||||
* This function allows the re-configure the PHY after
|
||||
* changing its strap pins.
|
||||
*/
|
||||
void ethernut5_phy_reset(void)
|
||||
{
|
||||
/* Do not modify anything, if we do not have a known version. */
|
||||
if (pwrman_major != 2)
|
||||
return;
|
||||
|
||||
/*
|
||||
* Make sure that the Ethernet clock is enabled and the PHY reset
|
||||
* is disabled for at least 100 us.
|
||||
*/
|
||||
i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_ENA, PWRMAN_ETHCLK);
|
||||
i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_DIS, PWRMAN_ETHRST);
|
||||
udelay(100);
|
||||
|
||||
/*
|
||||
* LAN8710 strap pins are
|
||||
* PA14 => PHY MODE0
|
||||
* PA15 => PHY MODE1
|
||||
* PA17 => PHY MODE2 => 111b all capable
|
||||
* PA18 => PHY ADDR0 => 0b
|
||||
*/
|
||||
at91_set_pio_input(AT91_PIO_PORTA, 14, 1);
|
||||
at91_set_pio_input(AT91_PIO_PORTA, 15, 1);
|
||||
at91_set_pio_input(AT91_PIO_PORTA, 17, 1);
|
||||
at91_set_pio_input(AT91_PIO_PORTA, 18, 0);
|
||||
|
||||
/* Activate PHY reset for 100 us. */
|
||||
i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_ENA, PWRMAN_ETHRST);
|
||||
udelay(100);
|
||||
i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_DIS, PWRMAN_ETHRST);
|
||||
|
||||
at91_set_pio_input(AT91_PIO_PORTA, 14, 1);
|
||||
}
|
||||
|
||||
/*
|
||||
* Output the firmware version we got during initialization.
|
||||
*/
|
||||
void ethernut5_print_version(void)
|
||||
{
|
||||
printf("%u.%u\n", pwrman_major, pwrman_minor);
|
||||
}
|
||||
|
||||
/*
|
||||
* All code below this point is optional and implements
|
||||
* the 'pwrman' command.
|
||||
*/
|
||||
#ifdef CONFIG_CMD_BSP
|
||||
|
||||
/* Human readable names of PMC features */
|
||||
char *pwrman_feat[8] = {
|
||||
"board", "vbin", "vbout", "mmc",
|
||||
"rs232", "ethclk", "ethrst", "wakeup"
|
||||
};
|
||||
|
||||
/*
|
||||
* Print all feature names, that have its related flags enabled.
|
||||
*/
|
||||
static void print_flagged_features(u8 flags)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < 8; i++) {
|
||||
if (flags & (1 << i))
|
||||
printf("%s ", pwrman_feat[i]);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Return flags of a given list of feature names.
|
||||
*
|
||||
* The function stops at the first unknown list entry and
|
||||
* returns the number of detected names as a function result.
|
||||
*/
|
||||
static int feature_flags(char * const names[], int num, u8 *flags)
|
||||
{
|
||||
int i, j;
|
||||
|
||||
*flags = 0;
|
||||
for (i = 0; i < num; i++) {
|
||||
for (j = 0; j < 8; j++) {
|
||||
if (strcmp(pwrman_feat[j], names[i]) == 0) {
|
||||
*flags |= 1 << j;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (j > 7)
|
||||
break;
|
||||
}
|
||||
return i;
|
||||
}
|
||||
|
||||
void ethernut5_print_power(void)
|
||||
{
|
||||
u8 flags;
|
||||
int i;
|
||||
|
||||
flags = i2c_reg_read(PWRMAN_I2C_ADDR, PWRMAN_REG_ENA);
|
||||
for (i = 0; i < 2; i++) {
|
||||
if (flags) {
|
||||
print_flagged_features(flags);
|
||||
printf("%s\n", i ? "off" : "on");
|
||||
}
|
||||
flags = ~flags;
|
||||
}
|
||||
}
|
||||
|
||||
void ethernut5_print_celsius(void)
|
||||
{
|
||||
int val;
|
||||
|
||||
/* Read ADC value from LM50 and return Celsius degrees. */
|
||||
val = i2c_reg_read(PWRMAN_I2C_ADDR, PWRMAN_REG_TEMP);
|
||||
val *= 5000; /* 100mV/degree with 5V reference */
|
||||
val += 128; /* 8 bit resolution */
|
||||
val /= 256;
|
||||
val -= 450; /* Celsius offset, still x10 */
|
||||
/* Output full degrees. */
|
||||
printf("%d\n", (val + 5) / 10);
|
||||
}
|
||||
|
||||
void ethernut5_print_voltage(void)
|
||||
{
|
||||
int val;
|
||||
|
||||
/* Read ADC value from divider and return voltage. */
|
||||
val = i2c_reg_read(PWRMAN_I2C_ADDR, PWRMAN_REG_VAUX);
|
||||
/* Resistors are 100k and 12.1k */
|
||||
val += 5;
|
||||
val *= 180948;
|
||||
val /= 100000;
|
||||
val++;
|
||||
/* Calculation was done in 0.1V units. */
|
||||
printf("%d\n", (val + 5) / 10);
|
||||
}
|
||||
|
||||
/*
|
||||
* Process the board specific 'pwrman' command.
|
||||
*/
|
||||
int do_pwrman(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
||||
{
|
||||
u8 val;
|
||||
int i;
|
||||
|
||||
if (argc == 1) {
|
||||
ethernut5_print_power();
|
||||
} else if (argc == 2 && strcmp(argv[1], "reset") == 0) {
|
||||
at91_set_pio_output(AT91_PIO_PORTB, 8, 1);
|
||||
udelay(100);
|
||||
at91_set_pio_output(AT91_PIO_PORTB, 8, 0);
|
||||
udelay(100000);
|
||||
} else if (argc == 2 && strcmp(argv[1], "temp") == 0) {
|
||||
ethernut5_print_celsius();
|
||||
} else if (argc == 2 && strcmp(argv[1], "vaux") == 0) {
|
||||
ethernut5_print_voltage();
|
||||
} else if (argc == 2 && strcmp(argv[1], "version") == 0) {
|
||||
ethernut5_print_version();
|
||||
} else if (strcmp(argv[1], "led") == 0) {
|
||||
/* Control the green status LED. Blink frequency unit
|
||||
** is 0.1s, very roughly. */
|
||||
if (argc == 2) {
|
||||
/* No more arguments, output current settings. */
|
||||
val = i2c_reg_read(PWRMAN_I2C_ADDR, PWRMAN_REG_LEDCTL);
|
||||
printf("led %u %u\n", val >> 4, val & 15);
|
||||
} else {
|
||||
/* First argument specifies the on-time. */
|
||||
val = (u8) simple_strtoul(argv[2], NULL, 0);
|
||||
val <<= 4;
|
||||
if (argc > 3) {
|
||||
/* Second argument specifies the off-time. */
|
||||
val |= (u8) (simple_strtoul(argv[3], NULL, 0)
|
||||
& 15);
|
||||
}
|
||||
/* Update the LED control register. */
|
||||
i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_LEDCTL, val);
|
||||
}
|
||||
} else {
|
||||
/* We expect a list of features followed an optional status. */
|
||||
argc--;
|
||||
i = feature_flags(&argv[1], argc, &val);
|
||||
if (argc == i) {
|
||||
/* We got a list only, print status. */
|
||||
val &= i2c_reg_read(PWRMAN_I2C_ADDR, PWRMAN_REG_STA);
|
||||
if (val) {
|
||||
if (i > 1)
|
||||
print_flagged_features(val);
|
||||
printf("active\n");
|
||||
} else {
|
||||
printf("inactive\n");
|
||||
}
|
||||
} else {
|
||||
/* More arguments. */
|
||||
if (i == 0) {
|
||||
/* No given feature, use despensibles. */
|
||||
val = PWRMAN_DISPENSIBLE;
|
||||
}
|
||||
if (strcmp(argv[i + 1], "on") == 0) {
|
||||
/* Enable features. */
|
||||
i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_ENA,
|
||||
val);
|
||||
} else if (strcmp(argv[i + 1], "off") == 0) {
|
||||
/* Disable features. */
|
||||
i2c_reg_write(PWRMAN_I2C_ADDR, PWRMAN_REG_DIS,
|
||||
val);
|
||||
} else {
|
||||
printf("Bad parameter %s\n", argv[i + 1]);
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
U_BOOT_CMD(
|
||||
pwrman, CONFIG_SYS_MAXARGS, 1, do_pwrman,
|
||||
"power management",
|
||||
"- print settings\n"
|
||||
"pwrman feature ...\n"
|
||||
" - print status\n"
|
||||
"pwrman [feature ...] on|off\n"
|
||||
" - enable/disable specified or all dispensible features\n"
|
||||
"pwrman led [on-time [off-time]]\n"
|
||||
" - print or set led blink timer\n"
|
||||
"pwrman temp\n"
|
||||
" - print board temperature (Celsius)\n"
|
||||
"pwrman vaux\n"
|
||||
" - print auxiliary input voltage\n"
|
||||
"pwrman reset\n"
|
||||
" - reset power management controller\n"
|
||||
"pwrman version\n"
|
||||
" - print firmware version\n"
|
||||
"\n"
|
||||
" features, (*)=dispensible:\n"
|
||||
" board - 1.8V and 3.3V supply\n"
|
||||
" vbin - supply via USB device connector\n"
|
||||
" vbout - USB host connector supply(*)\n"
|
||||
" mmc - MMC slot supply(*)\n"
|
||||
" rs232 - RS232 driver\n"
|
||||
" ethclk - Ethernet PHY clock(*)\n"
|
||||
" ethrst - Ethernet PHY reset\n"
|
||||
" wakeup - RTC alarm"
|
||||
);
|
||||
#endif /* CONFIG_CMD_BSP */
|
||||
Reference in New Issue
Block a user