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;
36 #if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
39 gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
40 gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
47 /* dram_init must store complete ramsize in gd->ram_size */
48 gd->ram_size = get_ram_size(
49 (volatile void *)CONFIG_SYS_SDRAM_BASE,
50 CONFIG_MAX_RAM_BANK_SIZE);
54 void dram_init_banksize(void)
56 gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
57 gd->bd->bi_dram[0].size = gd->ram_size;
61 #ifdef CONFIG_DRIVER_TI_EMAC
63 /* Read ethernet MAC address from EEPROM for DVEVM compatible boards.
64 * Returns 1 if found, 0 otherwise.
66 int dvevm_read_mac_address(uint8_t *buf)
68 #ifdef CONFIG_SYS_I2C_EEPROM_ADDR
69 /* Read MAC address. */
70 if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0x7F00, CONFIG_SYS_I2C_EEPROM_ADDR_LEN,
71 (uint8_t *) &buf[0], 6))
74 /* Check that MAC address is valid. */
75 if (!is_valid_ether_addr(buf))
81 printf("Read from EEPROM @ 0x%02x failed\n", CONFIG_SYS_I2C_EEPROM_ADDR);
83 #endif /* CONFIG_SYS_I2C_EEPROM_ADDR */
88 /* If there is a MAC address in the environment, and if it is not identical to
89 * the MAC address in the EEPROM, then a warning is printed and the MAC address
90 * from the environment is used.
92 * If there is no MAC address in the environment, then it will be initialized
93 * (silently) from the value in the EEPROM.
95 void dv_configure_mac_address(uint8_t *rom_enetaddr)
98 u_int8_t env_enetaddr[6];
99 char *tmp = getenv("ethaddr");
102 /* Read Ethernet MAC address from the U-Boot environment.
103 * If it is not defined, env_enetaddr[] will be cleared. */
104 for (i = 0; i < 6; i++) {
105 env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
107 tmp = (*end) ? end+1 : end;
110 /* Check if EEPROM and U-Boot environment MAC addresses match. */
111 if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6) != 0 &&
112 memcmp(env_enetaddr, rom_enetaddr, 6) != 0) {
113 printf("Warning: MAC addresses don't match:\n");
114 printf(" EEPROM MAC address: %pM\n", rom_enetaddr);
115 printf(" \"ethaddr\" value: %pM\n", env_enetaddr) ;
116 debug("### Using MAC address from environment\n");
121 /* There is no MAC address in the environment, so we initialize
122 * it from the value in the EEPROM. */
123 sprintf(ethaddr, "%pM", rom_enetaddr) ;
124 debug("### Setting environment from EEPROM MAC address = \"%s\"\n",
126 setenv("ethaddr", ethaddr);
130 #endif /* DAVINCI_EMAC */
133 * Change the setting of a pin multiplexer field.
135 * Takes an array of pinmux settings similar to:
137 * struct pinmux_config uart_pins[] = {
138 * { &davinci_syscfg_regs->pinmux[8], 2, 7 },
139 * { &davinci_syscfg_regs->pinmux[9], 2, 0 }
142 * Stepping through the array, each pinmux[n] register has the given value
143 * set in the pin mux field specified.
145 * The number of pins in the array must be passed (ARRAY_SIZE can provide
146 * this value conveniently).
148 * Returns 0 if all field numbers and values are in the correct range,
151 int davinci_configure_pin_mux(const struct pinmux_config *pins,
156 /* check for invalid pinmux values */
157 for (i = 0; i < n_pins; i++) {
158 if (pins[i].field >= PIN_MUX_NUM_FIELDS ||
159 (pins[i].value & ~PIN_MUX_FIELD_MASK) != 0)
163 /* configure the pinmuxes */
164 for (i = 0; i < n_pins; i++) {
165 const int offset = pins[i].field * PIN_MUX_FIELD_SIZE;
166 const unsigned int value = pins[i].value << offset;
167 const unsigned int mask = PIN_MUX_FIELD_MASK << offset;
168 const dv_reg *mux = pins[i].mux;
170 writel(value | (readl(mux) & (~mask)), mux);
177 * Configure multiple pinmux resources.
179 * Takes an pinmux_resource array of pinmux_config and pin counts:
181 * const struct pinmux_resource pinmuxes[] = {
182 * PINMUX_ITEM(uart_pins),
183 * PINMUX_ITEM(i2c_pins),
186 * The number of items in the array must be passed (ARRAY_SIZE can provide
187 * this value conveniently).
189 * Each item entry is configured in the defined order. If configuration
190 * of any item fails, -1 is returned and none of the following items are
191 * configured. On success, 0 is returned.
193 int davinci_configure_pin_mux_items(const struct pinmux_resource *item,
198 for (i = 0; i < n_items; i++) {
199 if (davinci_configure_pin_mux(item[i].pins,
200 item[i].n_pins) != 0)