--- /dev/null
+/*
+ * (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 */
Code Review / kvmfornfv.git / blobdiff