|
|
@@ -0,0 +1,338 @@
|
|
|
+/*
|
|
|
+ * (C) Copyright 2011
|
|
|
+ * egnite GmbH <info@egnite.de>
|
|
|
+ *
|
|
|
+ * See file CREDITS for list of people who contributed to this
|
|
|
+ * project.
|
|
|
+ *
|
|
|
+ * This program is free software; you can redistribute it and/or
|
|
|
+ * modify it under the terms of the GNU General Public License as
|
|
|
+ * published by the Free Software Foundation; either version 2 of
|
|
|
+ * the License, or (at your option) any later version.
|
|
|
+ *
|
|
|
+ * This program is distributed in the hope that it will be useful,
|
|
|
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
+ * GNU General Public License for more details.
|
|
|
+ *
|
|
|
+ * You should have received a copy of the GNU General Public License
|
|
|
+ * along with this program; if not, write to the Free Software
|
|
|
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
|
+ * MA 02111-1307 USA
|
|
|
+ */
|
|
|
+
|
|
|
+/*
|
|
|
+ * 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 */
|
Tim Schendekehl