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/*
* (C) Copyright 2000, 2001
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* ehnus: change pll frequency.
* Wed Sep 5 11:45:17 CST 2007
* hsun@udtech.com.cn
*/
#include <common.h>
#include <config.h>
#include <command.h>
#include <i2c.h>
#ifdef CONFIG_CMD_EEPROM
#define EEPROM_CONF_OFFSET 0
#define EEPROM_TEST_OFFSET 16
#define EEPROM_SDSTP_PARAM 16
#define PLL_NAME_MAX 12
#define BUF_STEP 8
/* eeprom_wirtes 8Byte per op. */
#define EEPROM_ALTER_FREQ(freq) \
do { \
int __i; \
for (__i = 0; __i < 2; __i++) \
eeprom_write (CONFIG_SYS_I2C_EEPROM_ADDR, \
EEPROM_CONF_OFFSET + __i*BUF_STEP, \
pll_select[freq], \
BUF_STEP + __i*BUF_STEP); \
} while (0)
#define PDEBUG
#ifdef PDEBUG
#define PLL_DEBUG pll_debug(EEPROM_CONF_OFFSET)
#else
#define PLL_DEBUG
#endif
typedef enum {
PLL_ebc20,
PLL_333,
PLL_4001,
PLL_4002,
PLL_533,
PLL_600,
PLL_666, /* For now, kilauea can't support */
RCONF,
WTEST,
PLL_TOTAL
} pll_freq_t;
static const char
pll_name[][PLL_NAME_MAX] = {
"PLL_ebc20",
"PLL_333",
"PLL_400@1",
"PLL_400@2",
"PLL_533",
"PLL_600",
"PLL_666",
"RCONF",
"WTEST",
""
};
/*
* ehnus:
*/
static uchar
pll_select[][EEPROM_SDSTP_PARAM] = {
/* 0: CPU 333MHz EBC 20MHz, for test only */
{
0x8c, 0x12, 0xec, 0x12, 0x88, 0x00, 0x0a, 0x00,
0x40, 0x08, 0x23, 0x50, 0x00, 0x05, 0x00, 0x00
},
/* 0: 333 */
{
0x8c, 0x12, 0xec, 0x12, 0x98, 0x00, 0x0a, 0x00,
0x40, 0x08, 0x23, 0x50, 0x00, 0x05, 0x00, 0x00
},
/* 1: 400_266 */
{
0x8e, 0x0e, 0xe8, 0x13, 0x98, 0x00, 0x0a, 0x00,
0x40, 0x08, 0x23, 0x50, 0x00, 0x05, 0x00, 0x00
},
/* 2: 400 */
{
0x8e, 0x0e, 0xe8, 0x12, 0x98, 0x00, 0x0a, 0x00,
0x40, 0x08, 0x23, 0x50, 0x00, 0x05, 0x00, 0x00
},
/* 3: 533 */
{
0x8e, 0x43, 0x60, 0x13, 0x98, 0x00, 0x0a, 0x00,
0x40, 0x08, 0x23, 0x50, 0x00, 0x05, 0x00, 0x00
},
/* 4: 600 */
{
0x8d, 0x02, 0x34, 0x13, 0x98, 0x00, 0x0a, 0x00,
0x40, 0x08, 0x23, 0x50, 0x00, 0x05, 0x00, 0x00
},
/* 5: 666 */
{
0x8d, 0x03, 0x78, 0x13, 0x98, 0x00, 0x0a, 0x00,
0x40, 0x08, 0x23, 0x50, 0x00, 0x05, 0x00, 0x00
},
{}
};
static uchar
testbuf[EEPROM_SDSTP_PARAM] = {
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff
};
static void
pll_debug(int off)
{
int i;
uchar buffer[EEPROM_SDSTP_PARAM];
memset(buffer, 0, sizeof(buffer));
eeprom_read(CONFIG_SYS_I2C_EEPROM_ADDR, off,
buffer, EEPROM_SDSTP_PARAM);
printf("Debug: SDSTP[0-3] at offset \"0x%02x\" lists as follows: \n", off);
for (i = 0; i < EEPROM_SDSTP_PARAM; i++)
printf("%02x ", buffer[i]);
printf("\n");
}
static void
test_write(void)
{
printf("Debug: test eeprom_write ... ");
/*
* Write twice, 8 bytes per write
*/
eeprom_write (CONFIG_SYS_I2C_EEPROM_ADDR, EEPROM_TEST_OFFSET,
testbuf, 8);
eeprom_write (CONFIG_SYS_I2C_EEPROM_ADDR, EEPROM_TEST_OFFSET+8,
testbuf, 16);
printf("done\n");
pll_debug(EEPROM_TEST_OFFSET);
}
int
do_pll_alter (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
char c = '\0';
pll_freq_t pll_freq;
if (argc < 2)
return cmd_usage(cmdtp);
for (pll_freq = PLL_ebc20; pll_freq < PLL_TOTAL; pll_freq++) {
if (!strcmp(pll_name[pll_freq], argv[1]))
break;
}
switch (pll_freq) {
case PLL_ebc20:
case PLL_333:
case PLL_4001:
case PLL_4002:
case PLL_533:
case PLL_600:
EEPROM_ALTER_FREQ(pll_freq);
break;
case PLL_666: /* not support */
printf("Choose this option will result in a boot failure."
"\nContinue? (Y/N): ");
c = getc(); putc('\n');
if ((c == 'y') || (c == 'Y')) {
EEPROM_ALTER_FREQ(pll_freq);
break;
}
goto ret;
case RCONF:
pll_debug(EEPROM_CONF_OFFSET);
goto ret;
case WTEST:
printf("DEBUG: write test\n");
test_write();
goto ret;
default:
printf("Invalid options\n\n");
return cmd_usage(cmdtp);
}
printf("PLL set to %s, "
"reset the board to take effect\n", pll_name[pll_freq]);
PLL_DEBUG;
ret:
return 0;
}
U_BOOT_CMD(
pllalter, CONFIG_SYS_MAXARGS, 1, do_pll_alter,
"change pll frequence",
"pllalter <selection> - change pll frequence \n\n\
** New freq take effect after reset. ** \n\
----------------------------------------------\n\
PLL_ebc20: Board: AMCC 405EX(r) Evaluation Board\n\
\t Same as PLL_333 \n\
\t except \n\
\t EBC: 20 MHz \n\
----------------------------------------------\n\
PLL_333: Board: AMCC 405EX(r) Evaluation Board\n\
\t VCO: 666 MHz \n\
\t CPU: 333 MHz \n\
\t PLB: 166 MHz \n\
\t OPB: 83 MHz \n\
\t DDR: 83 MHz \n\
------------------------------------------------\n\
PLL_400@1: Board: AMCC 405EX(r) Evaluation Board\n\
\t VCO: 800 MHz \n\
\t CPU: 400 MHz \n\
\t PLB: 133 MHz \n\
\t OPB: 66 MHz \n\
\t DDR: 133 MHz \n\
------------------------------------------------\n\
PLL_400@2: Board: AMCC 405EX(r) Evaluation Board\n\
\t VCO: 800 MHz \n\
\t CPU: 400 MHz \n\
\t PLB: 200 MHz \n\
\t OPB: 100 MHz \n\
\t DDR: 200 MHz \n\
----------------------------------------------\n\
PLL_533: Board: AMCC 405EX(r) Evaluation Board\n\
\t VCO: 1066 MHz \n\
\t CPU: 533 MHz \n\
\t PLB: 177 MHz \n\
\t OPB: 88 MHz \n\
\t DDR: 177 MHz \n\
----------------------------------------------\n\
PLL_600: Board: AMCC 405EX(r) Evaluation Board\n\
\t VCO: 1200 MHz \n\
\t CPU: 600 MHz \n\
\t PLB: 200 MHz \n\
\t OPB: 100 MHz \n\
\t DDR: 200 MHz \n\
----------------------------------------------\n\
PLL_666: Board: AMCC 405EX(r) Evaluation Board\n\
\t VCO: 1333 MHz \n\
\t CPU: 666 MHz \n\
\t PLB: 166 MHz \n\
\t OPB: 83 MHz \n\
\t DDR: 166 MHz \n\
-----------------------------------------------\n\
RCONF: Read current eeprom configuration. \n\
-----------------------------------------------\n\
WTEST: Test EEPROM write with predefined values\n\
-----------------------------------------------"
);
#endif /* CONFIG_CMD_EEPROM */
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