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![Nick Thompson](/assets/img/avatar_default.png)
Davinci: Table driven pinmux configuration Add code to allow pinmux_config tables to be grouped and configured as a single resource. This removes multiple calls to the pinmux configuration code from board_init and allows pinmuxes to be individually configured and added by data manipulation only. All related #ifdefs can the be removed from board_init code and since the compiler optimises away statics, #ifdefs can be reduced in the data definitions as well. Signed-off-by: Nick Thompson <nick.thompson@gefanuc.com>
189 lines
5.2 KiB
C
189 lines
5.2 KiB
C
/*
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* Miscelaneous DaVinci functions.
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*
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* Copyright (C) 2009 Nick Thompson, GE Fanuc Ltd, <nick.thompson@gefanuc.com>
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* Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
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* Copyright (C) 2008 Lyrtech <www.lyrtech.com>
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* Copyright (C) 2004 Texas Instruments.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <common.h>
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#include <i2c.h>
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#include <net.h>
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#include <asm/arch/hardware.h>
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#include <asm/io.h>
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#include "misc.h"
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DECLARE_GLOBAL_DATA_PTR;
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int dram_init(void)
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{
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gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
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gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
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return(0);
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}
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#ifdef CONFIG_DRIVER_TI_EMAC
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/* Read ethernet MAC address from EEPROM for DVEVM compatible boards.
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* Returns 1 if found, 0 otherwise.
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*/
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int dvevm_read_mac_address(uint8_t *buf)
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{
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#ifdef CONFIG_SYS_I2C_EEPROM_ADDR
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/* Read MAC address. */
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if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0x7F00, CONFIG_SYS_I2C_EEPROM_ADDR_LEN,
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(uint8_t *) &buf[0], 6))
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goto i2cerr;
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/* Check that MAC address is valid. */
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if (!is_valid_ether_addr(buf))
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goto err;
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return 1; /* Found */
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i2cerr:
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printf("Read from EEPROM @ 0x%02x failed\n", CONFIG_SYS_I2C_EEPROM_ADDR);
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err:
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#endif /* CONFIG_SYS_I2C_EEPROM_ADDR */
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return 0;
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}
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/* If there is a MAC address in the environment, and if it is not identical to
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* the MAC address in the EEPROM, then a warning is printed and the MAC address
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* from the environment is used.
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*
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* If there is no MAC address in the environment, then it will be initialized
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* (silently) from the value in the EEPROM.
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*/
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void dv_configure_mac_address(uint8_t *rom_enetaddr)
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{
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int i;
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u_int8_t env_enetaddr[6];
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char *tmp = getenv("ethaddr");
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char *end;
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/* Read Ethernet MAC address from the U-Boot environment.
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* If it is not defined, env_enetaddr[] will be cleared. */
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for (i = 0; i < 6; i++) {
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env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
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if (tmp)
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tmp = (*end) ? end+1 : end;
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}
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/* Check if EEPROM and U-Boot environment MAC addresses match. */
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if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6) != 0 &&
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memcmp(env_enetaddr, rom_enetaddr, 6) != 0) {
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printf("Warning: MAC addresses don't match:\n");
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printf(" EEPROM MAC address: %pM\n", rom_enetaddr);
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printf(" \"ethaddr\" value: %pM\n", env_enetaddr) ;
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debug("### Using MAC address from environment\n");
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}
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if (!tmp) {
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char ethaddr[20];
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/* There is no MAC address in the environment, so we initialize
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* it from the value in the EEPROM. */
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sprintf(ethaddr, "%pM", rom_enetaddr) ;
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debug("### Setting environment from EEPROM MAC address = \"%s\"\n",
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ethaddr);
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setenv("ethaddr", ethaddr);
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}
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}
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#endif /* DAVINCI_EMAC */
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/*
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* Change the setting of a pin multiplexer field.
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*
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* Takes an array of pinmux settings similar to:
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*
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* struct pinmux_config uart_pins[] = {
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* { &davinci_syscfg_regs->pinmux[8], 2, 7 },
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* { &davinci_syscfg_regs->pinmux[9], 2, 0 }
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* };
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*
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* Stepping through the array, each pinmux[n] register has the given value
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* set in the pin mux field specified.
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*
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* The number of pins in the array must be passed (ARRAY_SIZE can provide
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* this value conveniently).
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*
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* Returns 0 if all field numbers and values are in the correct range,
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* else returns -1.
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*/
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int davinci_configure_pin_mux(const struct pinmux_config *pins,
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const int n_pins)
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{
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int i;
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/* check for invalid pinmux values */
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for (i = 0; i < n_pins; i++) {
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if (pins[i].field >= PIN_MUX_NUM_FIELDS ||
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(pins[i].value & ~PIN_MUX_FIELD_MASK) != 0)
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return -1;
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}
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/* configure the pinmuxes */
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for (i = 0; i < n_pins; i++) {
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const int offset = pins[i].field * PIN_MUX_FIELD_SIZE;
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const unsigned int value = pins[i].value << offset;
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const unsigned int mask = PIN_MUX_FIELD_MASK << offset;
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const dv_reg *mux = pins[i].mux;
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writel(value | (readl(mux) & (~mask)), mux);
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}
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return 0;
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}
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/*
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* Configure multiple pinmux resources.
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*
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* Takes an pinmux_resource array of pinmux_config and pin counts:
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*
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* const struct pinmux_resource pinmuxes[] = {
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* PINMUX_ITEM(uart_pins),
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* PINMUX_ITEM(i2c_pins),
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* };
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*
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* The number of items in the array must be passed (ARRAY_SIZE can provide
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* this value conveniently).
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*
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* Each item entry is configured in the defined order. If configuration
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* of any item fails, -1 is returned and none of the following items are
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* configured. On success, 0 is returned.
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*/
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int davinci_configure_pin_mux_items(const struct pinmux_resource *item,
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const int n_items)
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{
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int i;
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for (i = 0; i < n_items; i++) {
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if (davinci_configure_pin_mux(item[i].pins,
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item[i].n_pins) != 0)
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return -1;
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}
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return 0;
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}
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