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 gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
39 gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
44 #ifdef CONFIG_DRIVER_TI_EMAC
46 /* Read ethernet MAC address from EEPROM for DVEVM compatible boards.
47 * Returns 1 if found, 0 otherwise.
49 int dvevm_read_mac_address(uint8_t *buf)
51 #ifdef CONFIG_SYS_I2C_EEPROM_ADDR
52 /* Read MAC address. */
53 if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0x7F00, CONFIG_SYS_I2C_EEPROM_ADDR_LEN,
54 (uint8_t *) &buf[0], 6))
57 /* Check that MAC address is valid. */
58 if (!is_valid_ether_addr(buf))
64 printf("Read from EEPROM @ 0x%02x failed\n", CONFIG_SYS_I2C_EEPROM_ADDR);
66 #endif /* CONFIG_SYS_I2C_EEPROM_ADDR */
71 /* If there is a MAC address in the environment, and if it is not identical to
72 * the MAC address in the EEPROM, then a warning is printed and the MAC address
73 * from the environment is used.
75 * If there is no MAC address in the environment, then it will be initialized
76 * (silently) from the value in the EEPROM.
78 void dv_configure_mac_address(uint8_t *rom_enetaddr)
81 u_int8_t env_enetaddr[6];
82 char *tmp = getenv("ethaddr");
85 /* Read Ethernet MAC address from the U-Boot environment.
86 * If it is not defined, env_enetaddr[] will be cleared. */
87 for (i = 0; i < 6; i++) {
88 env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
90 tmp = (*end) ? end+1 : end;
93 /* Check if EEPROM and U-Boot environment MAC addresses match. */
94 if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6) != 0 &&
95 memcmp(env_enetaddr, rom_enetaddr, 6) != 0) {
96 printf("Warning: MAC addresses don't match:\n");
97 printf(" EEPROM MAC address: %pM\n", rom_enetaddr);
98 printf(" \"ethaddr\" value: %pM\n", env_enetaddr) ;
99 debug("### Using MAC address from environment\n");
104 /* There is no MAC address in the environment, so we initialize
105 * it from the value in the EEPROM. */
106 sprintf(ethaddr, "%pM", rom_enetaddr) ;
107 debug("### Setting environment from EEPROM MAC address = \"%s\"\n",
109 setenv("ethaddr", ethaddr);
113 #endif /* DAVINCI_EMAC */
116 * Change the setting of a pin multiplexer field.
118 * Takes an array of pinmux settings similar to:
120 * struct pinmux_config uart_pins[] = {
121 * { &davinci_syscfg_regs->pinmux[8], 2, 7 },
122 * { &davinci_syscfg_regs->pinmux[9], 2, 0 }
125 * Stepping through the array, each pinmux[n] register has the given value
126 * set in the pin mux field specified.
128 * The number of pins in the array must be passed (ARRAY_SIZE can provide
129 * this value conveniently).
131 * Returns 0 if all field numbers and values are in the correct range,
134 int davinci_configure_pin_mux(const struct pinmux_config *pins,
139 /* check for invalid pinmux values */
140 for (i = 0; i < n_pins; i++) {
141 if (pins[i].field >= PIN_MUX_NUM_FIELDS ||
142 (pins[i].value & ~PIN_MUX_FIELD_MASK) != 0)
146 /* configure the pinmuxes */
147 for (i = 0; i < n_pins; i++) {
148 const int offset = pins[i].field * PIN_MUX_FIELD_SIZE;
149 const unsigned int value = pins[i].value << offset;
150 const unsigned int mask = PIN_MUX_FIELD_MASK << offset;
151 const dv_reg *mux = pins[i].mux;
153 writel(value | (readl(mux) & (~mask)), mux);
160 * Configure multiple pinmux resources.
162 * Takes an pinmux_resource array of pinmux_config and pin counts:
164 * const struct pinmux_resource pinmuxes[] = {
165 * PINMUX_ITEM(uart_pins),
166 * PINMUX_ITEM(i2c_pins),
169 * The number of items in the array must be passed (ARRAY_SIZE can provide
170 * this value conveniently).
172 * Each item entry is configured in the defined order. If configuration
173 * of any item fails, -1 is returned and none of the following items are
174 * configured. On success, 0 is returned.
176 int davinci_configure_pin_mux_items(const struct pinmux_resource *item,
181 for (i = 0; i < n_items; i++) {
182 if (davinci_configure_pin_mux(item[i].pins,
183 item[i].n_pins) != 0)