diff options
Diffstat (limited to 'board/egnite/ethernut5/ethernut5_pwrman.c')
-rw-r--r-- | board/egnite/ethernut5/ethernut5_pwrman.c | 323 |
1 files changed, 0 insertions, 323 deletions
diff --git a/board/egnite/ethernut5/ethernut5_pwrman.c b/board/egnite/ethernut5/ethernut5_pwrman.c deleted file mode 100644 index 42e1914a875..00000000000 --- a/board/egnite/ethernut5/ethernut5_pwrman.c +++ /dev/null @@ -1,323 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * (C) Copyright 2011 - * egnite GmbH <info@egnite.de> - */ - -/* - * 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 <command.h> -#include <vsprintf.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 <linux/delay.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(struct cmd_tbl *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 */ |