2 * Miscelaneous DaVinci functions.
4 * Copyright (C) 2009 Nick Thompson, GE Fanuc Ltd, <nick.thompson@gefanuc.com>
5 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
6 * Copyright (C) 2008 Lyrtech <www.lyrtech.com>
7 * Copyright (C) 2004 Texas Instruments.
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 #include <asm/arch/hardware.h>
34 DECLARE_GLOBAL_DATA_PTR;
38 /* dram_init must store complete ramsize in gd->ram_size */
39 gd->ram_size = get_ram_size(
40 (volatile void *)CONFIG_SYS_SDRAM_BASE,
41 CONFIG_MAX_RAM_BANK_SIZE);
45 void dram_init_banksize(void)
47 gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
48 gd->bd->bi_dram[0].size = gd->ram_size;
51 #ifdef CONFIG_DRIVER_TI_EMAC
53 /* Read ethernet MAC address from EEPROM for DVEVM compatible boards.
54 * Returns 1 if found, 0 otherwise.
56 int dvevm_read_mac_address(uint8_t *buf)
58 #ifdef CONFIG_SYS_I2C_EEPROM_ADDR
59 /* Read MAC address. */
60 if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0x7F00, CONFIG_SYS_I2C_EEPROM_ADDR_LEN,
61 (uint8_t *) &buf[0], 6))
64 /* Check that MAC address is valid. */
65 if (!is_valid_ether_addr(buf))
71 printf("Read from EEPROM @ 0x%02x failed\n", CONFIG_SYS_I2C_EEPROM_ADDR);
73 #endif /* CONFIG_SYS_I2C_EEPROM_ADDR */
79 * If there is no MAC address in the environment, then it will be initialized
80 * (silently) from the value in the EEPROM.
82 void davinci_sync_env_enetaddr(uint8_t *rom_enetaddr)
84 uint8_t env_enetaddr[6];
86 eth_getenv_enetaddr_by_index(0, env_enetaddr);
87 if (!memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
88 /* There is no MAC address in the environment, so we initialize
89 * it from the value in the EEPROM. */
90 debug("### Setting environment from EEPROM MAC address = "
93 eth_setenv_enetaddr("ethaddr", rom_enetaddr);
97 #endif /* DAVINCI_EMAC */
100 * Change the setting of a pin multiplexer field.
102 * Takes an array of pinmux settings similar to:
104 * struct pinmux_config uart_pins[] = {
105 * { &davinci_syscfg_regs->pinmux[8], 2, 7 },
106 * { &davinci_syscfg_regs->pinmux[9], 2, 0 }
109 * Stepping through the array, each pinmux[n] register has the given value
110 * set in the pin mux field specified.
112 * The number of pins in the array must be passed (ARRAY_SIZE can provide
113 * this value conveniently).
115 * Returns 0 if all field numbers and values are in the correct range,
118 int davinci_configure_pin_mux(const struct pinmux_config *pins,
123 /* check for invalid pinmux values */
124 for (i = 0; i < n_pins; i++) {
125 if (pins[i].field >= PIN_MUX_NUM_FIELDS ||
126 (pins[i].value & ~PIN_MUX_FIELD_MASK) != 0)
130 /* configure the pinmuxes */
131 for (i = 0; i < n_pins; i++) {
132 const int offset = pins[i].field * PIN_MUX_FIELD_SIZE;
133 const unsigned int value = pins[i].value << offset;
134 const unsigned int mask = PIN_MUX_FIELD_MASK << offset;
135 const dv_reg *mux = pins[i].mux;
137 writel(value | (readl(mux) & (~mask)), mux);
144 * Configure multiple pinmux resources.
146 * Takes an pinmux_resource array of pinmux_config and pin counts:
148 * const struct pinmux_resource pinmuxes[] = {
149 * PINMUX_ITEM(uart_pins),
150 * PINMUX_ITEM(i2c_pins),
153 * The number of items in the array must be passed (ARRAY_SIZE can provide
154 * this value conveniently).
156 * Each item entry is configured in the defined order. If configuration
157 * of any item fails, -1 is returned and none of the following items are
158 * configured. On success, 0 is returned.
160 int davinci_configure_pin_mux_items(const struct pinmux_resource *item,
165 for (i = 0; i < n_items; i++) {
166 if (davinci_configure_pin_mux(item[i].pins,
167 item[i].n_pins) != 0)