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-rw-r--r--board/freescale/common/pixis.c472
-rw-r--r--board/freescale/common/pixis.h31
2 files changed, 503 insertions, 0 deletions
diff --git a/board/freescale/common/pixis.c b/board/freescale/common/pixis.c
new file mode 100644
index 0000000..af98157
--- /dev/null
+++ b/board/freescale/common/pixis.c
@@ -0,0 +1,472 @@
+/*
+ * Copyright 2006 Freescale Semiconductor
+ * Jeff Brown
+ * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <watchdog.h>
+#include <asm/cache.h>
+
+#include "pixis.h"
+
+
+static ulong strfractoint(uchar *strptr);
+
+
+/*
+ * Simple board reset.
+ */
+void pixis_reset(void)
+{
+ out8(PIXIS_BASE + PIXIS_RST, 0);
+}
+
+
+/*
+ * Per table 27, page 58 of MPC8641HPCN spec.
+ */
+int set_px_sysclk(ulong sysclk)
+{
+ u8 sysclk_s, sysclk_r, sysclk_v, vclkh, vclkl, sysclk_aux;
+
+ switch (sysclk) {
+ case 33:
+ sysclk_s = 0x04;
+ sysclk_r = 0x04;
+ sysclk_v = 0x07;
+ sysclk_aux = 0x00;
+ break;
+ case 40:
+ sysclk_s = 0x01;
+ sysclk_r = 0x1F;
+ sysclk_v = 0x20;
+ sysclk_aux = 0x01;
+ break;
+ case 50:
+ sysclk_s = 0x01;
+ sysclk_r = 0x1F;
+ sysclk_v = 0x2A;
+ sysclk_aux = 0x02;
+ break;
+ case 66:
+ sysclk_s = 0x01;
+ sysclk_r = 0x04;
+ sysclk_v = 0x04;
+ sysclk_aux = 0x03;
+ break;
+ case 83:
+ sysclk_s = 0x01;
+ sysclk_r = 0x1F;
+ sysclk_v = 0x4B;
+ sysclk_aux = 0x04;
+ break;
+ case 100:
+ sysclk_s = 0x01;
+ sysclk_r = 0x1F;
+ sysclk_v = 0x5C;
+ sysclk_aux = 0x05;
+ break;
+ case 134:
+ sysclk_s = 0x06;
+ sysclk_r = 0x1F;
+ sysclk_v = 0x3B;
+ sysclk_aux = 0x06;
+ break;
+ case 166:
+ sysclk_s = 0x06;
+ sysclk_r = 0x1F;
+ sysclk_v = 0x4B;
+ sysclk_aux = 0x07;
+ break;
+ default:
+ printf("Unsupported SYSCLK frequency.\n");
+ return 0;
+ }
+
+ vclkh = (sysclk_s << 5) | sysclk_r;
+ vclkl = sysclk_v;
+
+ out8(PIXIS_BASE + PIXIS_VCLKH, vclkh);
+ out8(PIXIS_BASE + PIXIS_VCLKL, vclkl);
+
+ out8(PIXIS_BASE + PIXIS_AUX, sysclk_aux);
+
+ return 1;
+}
+
+
+int set_px_mpxpll(ulong mpxpll)
+{
+ u8 tmp;
+ u8 val;
+
+ switch (mpxpll) {
+ case 2:
+ case 4:
+ case 6:
+ case 8:
+ case 10:
+ case 12:
+ case 14:
+ case 16:
+ val = (u8) mpxpll;
+ break;
+ default:
+ printf("Unsupported MPXPLL ratio.\n");
+ return 0;
+ }
+
+ tmp = in8(PIXIS_BASE + PIXIS_VSPEED1);
+ tmp = (tmp & 0xF0) | (val & 0x0F);
+ out8(PIXIS_BASE + PIXIS_VSPEED1, tmp);
+
+ return 1;
+}
+
+
+int set_px_corepll(ulong corepll)
+{
+ u8 tmp;
+ u8 val;
+
+ switch ((int)corepll) {
+ case 20:
+ val = 0x08;
+ break;
+ case 25:
+ val = 0x0C;
+ break;
+ case 30:
+ val = 0x10;
+ break;
+ case 35:
+ val = 0x1C;
+ break;
+ case 40:
+ val = 0x14;
+ break;
+ case 45:
+ val = 0x0E;
+ break;
+ default:
+ printf("Unsupported COREPLL ratio.\n");
+ return 0;
+ }
+
+ tmp = in8(PIXIS_BASE + PIXIS_VSPEED0);
+ tmp = (tmp & 0xE0) | (val & 0x1F);
+ out8(PIXIS_BASE + PIXIS_VSPEED0, tmp);
+
+ return 1;
+}
+
+
+void read_from_px_regs(int set)
+{
+ u8 mask = 0x1C;
+ u8 tmp = in8(PIXIS_BASE + PIXIS_VCFGEN0);
+
+ if (set)
+ tmp = tmp | mask;
+ else
+ tmp = tmp & ~mask;
+ out8(PIXIS_BASE + PIXIS_VCFGEN0, tmp);
+}
+
+
+void read_from_px_regs_altbank(int set)
+{
+ u8 mask = 0x04;
+ u8 tmp = in8(PIXIS_BASE + PIXIS_VCFGEN1);
+
+ if (set)
+ tmp = tmp | mask;
+ else
+ tmp = tmp & ~mask;
+ out8(PIXIS_BASE + PIXIS_VCFGEN1, tmp);
+}
+
+
+void set_altbank(void)
+{
+ u8 tmp;
+
+ tmp = in8(PIXIS_BASE + PIXIS_VBOOT);
+ tmp ^= 0x40;
+
+ out8(PIXIS_BASE + PIXIS_VBOOT, tmp);
+}
+
+
+void set_px_go(void)
+{
+ u8 tmp;
+
+ tmp = in8(PIXIS_BASE + PIXIS_VCTL);
+ tmp = tmp & 0x1E;
+ out8(PIXIS_BASE + PIXIS_VCTL, tmp);
+
+ tmp = in8(PIXIS_BASE + PIXIS_VCTL);
+ tmp = tmp | 0x01;
+ out8(PIXIS_BASE + PIXIS_VCTL, tmp);
+}
+
+
+void set_px_go_with_watchdog(void)
+{
+ u8 tmp;
+
+ tmp = in8(PIXIS_BASE + PIXIS_VCTL);
+ tmp = tmp & 0x1E;
+ out8(PIXIS_BASE + PIXIS_VCTL, tmp);
+
+ tmp = in8(PIXIS_BASE + PIXIS_VCTL);
+ tmp = tmp | 0x09;
+ out8(PIXIS_BASE + PIXIS_VCTL, tmp);
+}
+
+
+int pixis_disable_watchdog_cmd(cmd_tbl_t *cmdtp,
+ int flag, int argc, char *argv[])
+{
+ u8 tmp;
+
+ tmp = in8(PIXIS_BASE + PIXIS_VCTL);
+ tmp = tmp & 0x1E;
+ out8(PIXIS_BASE + PIXIS_VCTL, tmp);
+
+ /* setting VCTL[WDEN] to 0 to disable watch dog */
+ tmp = in8(PIXIS_BASE + PIXIS_VCTL);
+ tmp &= ~0x08;
+ out8(PIXIS_BASE + PIXIS_VCTL, tmp);
+
+ return 0;
+}
+
+U_BOOT_CMD(
+ diswd, 1, 0, pixis_disable_watchdog_cmd,
+ "diswd - Disable watchdog timer \n",
+ NULL);
+
+/*
+ * This function takes the non-integral cpu:mpx pll ratio
+ * and converts it to an integer that can be used to assign
+ * FPGA register values.
+ * input: strptr i.e. argv[2]
+ */
+
+static ulong strfractoint(uchar *strptr)
+{
+ int i, j, retval;
+ int mulconst;
+ int intarr_len = 0, decarr_len = 0, no_dec = 0;
+ ulong intval = 0, decval = 0;
+ uchar intarr[3], decarr[3];
+
+ /* Assign the integer part to intarr[]
+ * If there is no decimal point i.e.
+ * if the ratio is an integral value
+ * simply create the intarr.
+ */
+ i = 0;
+ while (strptr[i] != 46) {
+ if (strptr[i] == 0) {
+ no_dec = 1;
+ break;
+ }
+ intarr[i] = strptr[i];
+ i++;
+ }
+
+ /* Assign length of integer part to intarr_len. */
+ intarr_len = i;
+ intarr[i] = '\0';
+
+ if (no_dec) {
+ /* Currently needed only for single digit corepll ratios */
+ mulconst = 10;
+ decval = 0;
+ } else {
+ j = 0;
+ i++; /* Skipping the decimal point */
+ while ((strptr[i] > 47) && (strptr[i] < 58)) {
+ decarr[j] = strptr[i];
+ i++;
+ j++;
+ }
+
+ decarr_len = j;
+ decarr[j] = '\0';
+
+ mulconst = 1;
+ for (i = 0; i < decarr_len; i++)
+ mulconst *= 10;
+ decval = simple_strtoul(decarr, NULL, 10);
+ }
+
+ intval = simple_strtoul(intarr, NULL, 10);
+ intval = intval * mulconst;
+
+ retval = intval + decval;
+
+ return retval;
+}
+
+
+int
+pixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ ulong val;
+ ulong corepll;
+
+ /*
+ * No args is a simple reset request.
+ */
+ if (argc <= 1) {
+ pixis_reset();
+ /* not reached */
+ }
+
+ if (strcmp(argv[1], "cf") == 0) {
+
+ /*
+ * Reset with frequency changed:
+ * cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>
+ */
+ if (argc < 5) {
+ puts(cmdtp->usage);
+ return 1;
+ }
+
+ read_from_px_regs(0);
+
+ val = set_px_sysclk(simple_strtoul(argv[2], NULL, 10));
+
+ corepll = strfractoint(argv[3]);
+ val = val + set_px_corepll(corepll);
+ val = val + set_px_mpxpll(simple_strtoul(argv[4], NULL, 10));
+ if (val == 3) {
+ puts("Setting registers VCFGEN0 and VCTL\n");
+ read_from_px_regs(1);
+ puts("Resetting board with values from ");
+ puts("VSPEED0, VSPEED1, VCLKH, and VCLKL \n");
+ set_px_go();
+ } else {
+ puts(cmdtp->usage);
+ return 1;
+ }
+
+ while (1) ; /* Not reached */
+
+ } else if (strcmp(argv[1], "altbank") == 0) {
+
+ /*
+ * Reset using alternate flash bank:
+ */
+ if (argv[2] == 0) {
+ /*
+ * Reset from alternate bank without changing
+ * frequency and without watchdog timer enabled.
+ * altbank
+ */
+ read_from_px_regs(0);
+ read_from_px_regs_altbank(0);
+ if (argc > 2) {
+ puts(cmdtp->usage);
+ return 1;
+ }
+ puts("Setting registers VCFGNE1, VBOOT, and VCTL\n");
+ set_altbank();
+ read_from_px_regs_altbank(1);
+ puts("Resetting board to boot from the other bank.\n");
+ set_px_go();
+
+ } else if (strcmp(argv[2], "cf") == 0) {
+ /*
+ * Reset with frequency changed
+ * altbank cf <SYSCLK freq> <COREPLL ratio>
+ * <MPXPLL ratio>
+ */
+ read_from_px_regs(0);
+ read_from_px_regs_altbank(0);
+ val = set_px_sysclk(simple_strtoul(argv[3], NULL, 10));
+ corepll = strfractoint(argv[4]);
+ val = val + set_px_corepll(corepll);
+ val = val + set_px_mpxpll(simple_strtoul(argv[5],
+ NULL, 10));
+ if (val == 3) {
+ puts("Setting registers VCFGEN0, VCFGEN1, VBOOT, and VCTL\n");
+ set_altbank();
+ read_from_px_regs(1);
+ read_from_px_regs_altbank(1);
+ puts("Enabling watchdog timer on the FPGA\n");
+ puts("Resetting board with values from ");
+ puts("VSPEED0, VSPEED1, VCLKH and VCLKL ");
+ puts("to boot from the other bank.\n");
+ set_px_go_with_watchdog();
+ } else {
+ puts(cmdtp->usage);
+ return 1;
+ }
+
+ while (1) ; /* Not reached */
+
+ } else if (strcmp(argv[2], "wd") == 0) {
+ /*
+ * Reset from alternate bank without changing
+ * frequencies but with watchdog timer enabled:
+ * altbank wd
+ */
+ read_from_px_regs(0);
+ read_from_px_regs_altbank(0);
+ puts("Setting registers VCFGEN1, VBOOT, and VCTL\n");
+ set_altbank();
+ read_from_px_regs_altbank(1);
+ puts("Enabling watchdog timer on the FPGA\n");
+ puts("Resetting board to boot from the other bank.\n");
+ set_px_go_with_watchdog();
+ while (1) ; /* Not reached */
+
+ } else {
+ puts(cmdtp->usage);
+ return 1;
+ }
+
+ } else {
+ puts(cmdtp->usage);
+ return 1;
+ }
+
+ return 0;
+}
+
+
+U_BOOT_CMD(
+ pixis_reset, CFG_MAXARGS, 1, pixis_reset_cmd,
+ "pixis_reset - Reset the board using the FPGA sequencer\n",
+ " pixis_reset\n"
+ " pixis_reset [altbank]\n"
+ " pixis_reset altbank wd\n"
+ " pixis_reset altbank cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>\n"
+ " pixis_reset cf <SYSCLK freq> <COREPLL ratio> <MPXPLL ratio>\n"
+ );
diff --git a/board/freescale/common/pixis.h b/board/freescale/common/pixis.h
new file mode 100644
index 0000000..ff62a62
--- /dev/null
+++ b/board/freescale/common/pixis.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2006 Freescale Semiconductor
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+extern void pixis_reset(void);
+extern int set_px_sysclk(ulong sysclk);
+extern int set_px_mpxpll(ulong mpxpll);
+extern int set_px_corepll(ulong corepll);
+extern void read_from_px_regs(int set);
+extern void read_from_px_regs_altbank(int set);
+extern void set_altbank(void);
+extern void set_px_go(void);
+extern void set_px_go_with_watchdog(void);
generated by cgit v1.1 at 2024-12-16 06:50:46 +0000