2 * (C) Copyright 2003-2008
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * Mark Jonas, Freescale Semiconductor, mark.jonas@motorola.com.
9 * Martin Krause, TQ-Systems GmbH, martin.krause@tqs.de
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
33 #include <asm/processor.h>
36 #ifndef CONFIG_SYS_RAMBOOT
37 static void sdram_start (int hi_addr)
39 long hi_addr_bit = hi_addr ? 0x01000000 : 0;
41 /* unlock mode register */
42 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000000 | hi_addr_bit;
43 __asm__ volatile ("sync");
45 /* precharge all banks */
46 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit;
47 __asm__ volatile ("sync");
50 /* set mode register: extended mode */
51 *(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_EMODE;
52 __asm__ volatile ("sync");
54 /* set mode register: reset DLL */
55 *(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE | 0x04000000;
56 __asm__ volatile ("sync");
59 /* precharge all banks */
60 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000002 | hi_addr_bit;
61 __asm__ volatile ("sync");
64 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | 0x80000004 | hi_addr_bit;
65 __asm__ volatile ("sync");
67 /* set mode register */
68 *(vu_long *)MPC5XXX_SDRAM_MODE = SDRAM_MODE;
69 __asm__ volatile ("sync");
71 /* normal operation */
72 *(vu_long *)MPC5XXX_SDRAM_CTRL = SDRAM_CONTROL | hi_addr_bit;
73 __asm__ volatile ("sync");
78 * ATTENTION: Although partially referenced initdram does NOT make real use
79 * use of CONFIG_SYS_SDRAM_BASE. The code does not work if CONFIG_SYS_SDRAM_BASE
80 * is something else than 0x00000000.
83 phys_size_t initdram (int board_type)
86 #ifndef CONFIG_SYS_RAMBOOT
90 /* setup SDRAM chip selects */
91 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x0000001c; /* 512MB at 0x0 */
92 *(vu_long *)MPC5XXX_SDRAM_CS1CFG = 0x40000000; /* disabled */
93 __asm__ volatile ("sync");
95 /* setup config registers */
96 *(vu_long *)MPC5XXX_SDRAM_CONFIG1 = SDRAM_CONFIG1;
97 *(vu_long *)MPC5XXX_SDRAM_CONFIG2 = SDRAM_CONFIG2;
98 __asm__ volatile ("sync");
102 *(vu_long *)MPC5XXX_CDM_PORCFG = SDRAM_TAPDELAY;
103 __asm__ volatile ("sync");
106 /* find RAM size using SDRAM CS0 only */
108 test1 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x20000000);
110 test2 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x20000000);
118 /* memory smaller than 1MB is impossible */
119 if (dramsize < (1 << 20)) {
123 /* set SDRAM CS0 size according to the amount of RAM found */
125 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0x13 +
126 __builtin_ffs(dramsize >> 20) - 1;
128 *(vu_long *)MPC5XXX_SDRAM_CS0CFG = 0; /* disabled */
131 *(vu_long *)MPC5XXX_SDRAM_CS1CFG = dramsize; /* disabled */
132 #else /* CONFIG_SYS_RAMBOOT */
134 /* retrieve size of memory connected to SDRAM CS0 */
135 dramsize = *(vu_long *)MPC5XXX_SDRAM_CS0CFG & 0xFF;
136 if (dramsize >= 0x13) {
137 dramsize = (1 << (dramsize - 0x13)) << 20;
142 /* retrieve size of memory connected to SDRAM CS1 */
143 dramsize2 = *(vu_long *)MPC5XXX_SDRAM_CS1CFG & 0xFF;
144 if (dramsize2 >= 0x13) {
145 dramsize2 = (1 << (dramsize2 - 0x13)) << 20;
150 #endif /* CONFIG_SYS_RAMBOOT */
153 * On MPC5200B we need to set the special configuration delay in the
154 * DDR controller. Please refer to Freescale's AN3221 "MPC5200B SDRAM
155 * Initialization and Configuration", 3.3.1 SDelay--MBAR + 0x0190:
157 * "The SDelay should be written to a value of 0x00000004. It is
158 * required to account for changes caused by normal wafer processing
163 if ((SVR_MJREV(svr) >= 2) &&
164 (PVR_MAJ(pvr) == 1) && (PVR_MIN(pvr) == 4)) {
166 *(vu_long *)MPC5XXX_SDRAM_SDELAY = 0x04;
167 __asm__ volatile ("sync");
170 /* return dramsize + dramsize2; */
174 int checkboard (void)
176 puts ("Board: HMI1001\n");
180 #ifdef CONFIG_PREBOOT
182 static uchar kbd_magic_prefix[] = "key_magic";
183 static uchar kbd_command_prefix[] = "key_cmd";
194 struct kbd_data_t* get_keys (struct kbd_data_t *kbd_data)
196 kbd_data->s1 = *((volatile uchar*)(CONFIG_SYS_STATUS1_BASE));
197 kbd_data->s2 = *((volatile uchar*)(CONFIG_SYS_STATUS2_BASE));
202 static int compare_magic (const struct kbd_data_t *kbd_data, char *str)
207 if (s1 >= '0' && s1 <= '9')
209 else if (s1 >= 'a' && s1 <= 'f')
211 else if (s1 >= 'A' && s1 <= 'F')
216 if (((S1_ROT & kbd_data->s1) >> 4) != s1)
219 s2 = (S2_Q | S2_M) & kbd_data->s2;
233 if (s2 == (S2_Q | S2_M))
245 static char *key_match (const struct kbd_data_t *kbd_data)
247 char magic[sizeof (kbd_magic_prefix) + 1];
249 char *kbd_magic_keys;
252 * The following string defines the characters that can be appended
253 * to "key_magic" to form the names of environment variables that
254 * hold "magic" key codes, i. e. such key codes that can cause
255 * pre-boot actions. If the string is empty (""), then only
256 * "key_magic" is checked (old behaviour); the string "125" causes
257 * checks for "key_magic1", "key_magic2" and "key_magic5", etc.
259 if ((kbd_magic_keys = getenv ("magic_keys")) == NULL)
262 /* loop over all magic keys;
263 * use '\0' suffix in case of empty string
265 for (suffix = kbd_magic_keys; *suffix ||
266 suffix == kbd_magic_keys; ++suffix) {
267 sprintf (magic, "%s%c", kbd_magic_prefix, *suffix);
269 if (compare_magic(kbd_data, getenv(magic)) == 0) {
270 char cmd_name[sizeof (kbd_command_prefix) + 1];
273 sprintf (cmd_name, "%s%c", kbd_command_prefix, *suffix);
274 cmd = getenv (cmd_name);
283 #endif /* CONFIG_PREBOOT */
285 int misc_init_r (void)
287 #ifdef CONFIG_PREBOOT
288 struct kbd_data_t kbd_data;
290 char *str = strdup (key_match (get_keys (&kbd_data)));
291 /* Set or delete definition */
292 setenv ("preboot", str);
294 #endif /* CONFIG_PREBOOT */
299 int board_early_init_r (void)
301 *(vu_long *)MPC5XXX_BOOTCS_CFG &= ~0x1; /* clear RO */
302 *(vu_long *)MPC5XXX_BOOTCS_START =
303 *(vu_long *)MPC5XXX_CS0_START = START_REG(CONFIG_SYS_FLASH_BASE);
304 *(vu_long *)MPC5XXX_BOOTCS_STOP =
305 *(vu_long *)MPC5XXX_CS0_STOP = STOP_REG(CONFIG_SYS_FLASH_BASE, CONFIG_SYS_FLASH_SIZE);
309 static struct pci_controller hose;
311 extern void pci_mpc5xxx_init(struct pci_controller *);
313 void pci_init_board(void)
315 pci_mpc5xxx_init(&hose);