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Hugo Villeneuve4e352ef2008-07-11 15:10:13 -04001/*
2 * Miscelaneous DaVinci functions.
3 *
Nick Thompson68bfdc82009-11-12 11:03:23 -05004 * Copyright (C) 2009 Nick Thompson, GE Fanuc Ltd, <nick.thompson@gefanuc.com>
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -04005 * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
6 * Copyright (C) 2008 Lyrtech <www.lyrtech.com>
7 * Copyright (C) 2004 Texas Instruments.
8 *
9 * See file CREDITS for list of people who contributed to this
10 * project.
11 *
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.
16 *
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.
21 *
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.
25 */
26
27#include <common.h>
28#include <i2c.h>
David Brownellc83d2d92009-04-12 22:49:26 -070029#include <net.h>
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -040030#include <asm/arch/hardware.h>
Nick Thompson68bfdc82009-11-12 11:03:23 -050031#include <asm/io.h>
32#include "misc.h"
David Brownell45064002009-05-15 23:47:12 +020033
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -040034DECLARE_GLOBAL_DATA_PTR;
35
Ben Gardiner7618f612010-08-23 09:08:15 -040036#if defined(CONFIG_SYS_ARM_WITHOUT_RELOC)
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -040037int dram_init(void)
38{
39 gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
40 gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
41
42 return(0);
43}
Ben Gardiner7618f612010-08-23 09:08:15 -040044#else
45int dram_init(void)
46{
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);
51 return 0;
52}
53
54void dram_init_banksize(void)
55{
56 gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
57 gd->bd->bi_dram[0].size = gd->ram_size;
58}
59#endif
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -040060
David Brownellc83d2d92009-04-12 22:49:26 -070061#ifdef CONFIG_DRIVER_TI_EMAC
62
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -040063/* Read ethernet MAC address from EEPROM for DVEVM compatible boards.
64 * Returns 1 if found, 0 otherwise.
65 */
66int dvevm_read_mac_address(uint8_t *buf)
67{
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +020068#ifdef CONFIG_SYS_I2C_EEPROM_ADDR
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -040069 /* Read MAC address. */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +020070 if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0x7F00, CONFIG_SYS_I2C_EEPROM_ADDR_LEN,
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -040071 (uint8_t *) &buf[0], 6))
72 goto i2cerr;
73
David Brownellc83d2d92009-04-12 22:49:26 -070074 /* Check that MAC address is valid. */
75 if (!is_valid_ether_addr(buf))
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -040076 goto err;
77
78 return 1; /* Found */
79
80i2cerr:
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +020081 printf("Read from EEPROM @ 0x%02x failed\n", CONFIG_SYS_I2C_EEPROM_ADDR);
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -040082err:
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +020083#endif /* CONFIG_SYS_I2C_EEPROM_ADDR */
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -040084
85 return 0;
86}
87
88/* If there is a MAC address in the environment, and if it is not identical to
David Brownellc83d2d92009-04-12 22:49:26 -070089 * the MAC address in the EEPROM, then a warning is printed and the MAC address
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -040090 * from the environment is used.
91 *
92 * If there is no MAC address in the environment, then it will be initialized
David Brownellc83d2d92009-04-12 22:49:26 -070093 * (silently) from the value in the EEPROM.
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -040094 */
95void dv_configure_mac_address(uint8_t *rom_enetaddr)
96{
97 int i;
98 u_int8_t env_enetaddr[6];
99 char *tmp = getenv("ethaddr");
100 char *end;
101
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;
106 if (tmp)
107 tmp = (*end) ? end+1 : end;
108 }
109
David Brownellc83d2d92009-04-12 22:49:26 -0700110 /* Check if EEPROM and U-Boot environment MAC addresses match. */
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -0400111 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");
David Brownellc83d2d92009-04-12 22:49:26 -0700114 printf(" EEPROM MAC address: %pM\n", rom_enetaddr);
115 printf(" \"ethaddr\" value: %pM\n", env_enetaddr) ;
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -0400116 debug("### Using MAC address from environment\n");
117 }
118 if (!tmp) {
119 char ethaddr[20];
120
121 /* There is no MAC address in the environment, so we initialize
David Brownellc83d2d92009-04-12 22:49:26 -0700122 * it from the value in the EEPROM. */
123 sprintf(ethaddr, "%pM", rom_enetaddr) ;
124 debug("### Setting environment from EEPROM MAC address = \"%s\"\n",
Hugo Villeneuve4e352ef2008-07-11 15:10:13 -0400125 ethaddr);
126 setenv("ethaddr", ethaddr);
127 }
128}
David Brownellc83d2d92009-04-12 22:49:26 -0700129
130#endif /* DAVINCI_EMAC */
Nick Thompson68bfdc82009-11-12 11:03:23 -0500131
132/*
133 * Change the setting of a pin multiplexer field.
134 *
135 * Takes an array of pinmux settings similar to:
136 *
137 * struct pinmux_config uart_pins[] = {
138 * { &davinci_syscfg_regs->pinmux[8], 2, 7 },
139 * { &davinci_syscfg_regs->pinmux[9], 2, 0 }
140 * };
141 *
142 * Stepping through the array, each pinmux[n] register has the given value
143 * set in the pin mux field specified.
144 *
145 * The number of pins in the array must be passed (ARRAY_SIZE can provide
146 * this value conveniently).
147 *
148 * Returns 0 if all field numbers and values are in the correct range,
149 * else returns -1.
150 */
151int davinci_configure_pin_mux(const struct pinmux_config *pins,
152 const int n_pins)
153{
154 int i;
155
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)
160 return -1;
161 }
162
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;
169
170 writel(value | (readl(mux) & (~mask)), mux);
171 }
172
173 return 0;
174}
Nick Thompsonced18552009-12-12 12:10:51 -0500175
176/*
177 * Configure multiple pinmux resources.
178 *
179 * Takes an pinmux_resource array of pinmux_config and pin counts:
180 *
181 * const struct pinmux_resource pinmuxes[] = {
182 * PINMUX_ITEM(uart_pins),
183 * PINMUX_ITEM(i2c_pins),
184 * };
185 *
186 * The number of items in the array must be passed (ARRAY_SIZE can provide
187 * this value conveniently).
188 *
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.
192 */
193int davinci_configure_pin_mux_items(const struct pinmux_resource *item,
194 const int n_items)
195{
196 int i;
197
198 for (i = 0; i < n_items; i++) {
199 if (davinci_configure_pin_mux(item[i].pins,
200 item[i].n_pins) != 0)
201 return -1;
202 }
203
204 return 0;
205}