blob: be709bf81e9046c74331911644f6c8a37c5687b7 [file] [log] [blame]
Hugo Villeneuve264bbdd2008-07-11 15:10:13 -04001/*
2 * Miscelaneous DaVinci functions.
3 *
4 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
5 * Copyright (C) 2008 Lyrtech <www.lyrtech.com>
6 * Copyright (C) 2004 Texas Instruments.
7 *
8 * See file CREDITS for list of people who contributed to this
9 * project.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25
26#include <common.h>
27#include <i2c.h>
28#include <asm/arch/hardware.h>
29
30DECLARE_GLOBAL_DATA_PTR;
31
32int dram_init(void)
33{
34 gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
35 gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
36
37 return(0);
38}
39
40static int dv_get_pllm_output(uint32_t pllm)
41{
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020042 return (pllm + 1) * (CONFIG_SYS_HZ_CLOCK / 1000000);
Hugo Villeneuve264bbdd2008-07-11 15:10:13 -040043}
44
45void dv_display_clk_infos(void)
46{
47 printf("ARM Clock: %dMHz\n", dv_get_pllm_output(REG(PLL1_PLLM)) / 2);
48 printf("DDR Clock: %dMHz\n", dv_get_pllm_output(REG(PLL2_PLLM)) /
49 ((REG(PLL2_DIV2) & 0x1f) + 1) / 2);
50}
51
52/* Read ethernet MAC address from EEPROM for DVEVM compatible boards.
53 * Returns 1 if found, 0 otherwise.
54 */
55int dvevm_read_mac_address(uint8_t *buf)
56{
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020057#ifdef CONFIG_SYS_I2C_EEPROM_ADDR
Hugo Villeneuve264bbdd2008-07-11 15:10:13 -040058 /* Read MAC address. */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020059 if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0x7F00, CONFIG_SYS_I2C_EEPROM_ADDR_LEN,
Hugo Villeneuve264bbdd2008-07-11 15:10:13 -040060 (uint8_t *) &buf[0], 6))
61 goto i2cerr;
62
63 /* Check that MAC address is not null. */
64 if (memcmp(buf, "\0\0\0\0\0\0", 6) == 0)
65 goto err;
66
67 return 1; /* Found */
68
69i2cerr:
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020070 printf("Read from EEPROM @ 0x%02x failed\n", CONFIG_SYS_I2C_EEPROM_ADDR);
Hugo Villeneuve264bbdd2008-07-11 15:10:13 -040071err:
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020072#endif /* CONFIG_SYS_I2C_EEPROM_ADDR */
Hugo Villeneuve264bbdd2008-07-11 15:10:13 -040073
74 return 0;
75}
76
77/* If there is a MAC address in the environment, and if it is not identical to
78 * the MAC address in the ROM, then a warning is printed and the MAC address
79 * from the environment is used.
80 *
81 * If there is no MAC address in the environment, then it will be initialized
82 * (silently) from the value in the ROM.
83 */
84void dv_configure_mac_address(uint8_t *rom_enetaddr)
85{
86 int i;
87 u_int8_t env_enetaddr[6];
88 char *tmp = getenv("ethaddr");
89 char *end;
90
91 /* Read Ethernet MAC address from the U-Boot environment.
92 * If it is not defined, env_enetaddr[] will be cleared. */
93 for (i = 0; i < 6; i++) {
94 env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
95 if (tmp)
96 tmp = (*end) ? end+1 : end;
97 }
98
99 /* Check if ROM and U-Boot environment MAC addresses match. */
100 if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6) != 0 &&
101 memcmp(env_enetaddr, rom_enetaddr, 6) != 0) {
102 printf("Warning: MAC addresses don't match:\n");
103 printf(" ROM MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n",
104 rom_enetaddr[0], rom_enetaddr[1],
105 rom_enetaddr[2], rom_enetaddr[3],
106 rom_enetaddr[4], rom_enetaddr[5]);
107 printf(" \"ethaddr\" value: %02X:%02X:%02X:%02X:%02X:%02X\n",
108 env_enetaddr[0], env_enetaddr[1],
109 env_enetaddr[2], env_enetaddr[3],
110 env_enetaddr[4], env_enetaddr[5]) ;
111 debug("### Using MAC address from environment\n");
112 }
113 if (!tmp) {
114 char ethaddr[20];
115
116 /* There is no MAC address in the environment, so we initialize
117 * it from the value in the ROM. */
118 sprintf(ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X",
119 rom_enetaddr[0], rom_enetaddr[1],
120 rom_enetaddr[2], rom_enetaddr[3],
121 rom_enetaddr[4], rom_enetaddr[5]) ;
122 debug("### Setting environment from ROM MAC address = \"%s\"\n",
123 ethaddr);
124 setenv("ethaddr", ethaddr);
125 }
126}