--- /dev/null
+/*
+ * Copyright 2006,2010 Freescale Semiconductor
+ * Jeff Brown
+ * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/io.h>
+
+#define pixis_base (u8 *)PIXIS_BASE
+
+/*
+ * Simple board reset.
+ */
+void pixis_reset(void)
+{
+ out_8(pixis_base + PIXIS_RST, 0);
+
+ while (1);
+}
+
+/*
+ * Per table 27, page 58 of MPC8641HPCN spec.
+ */
+static int set_px_sysclk(unsigned long 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;
+
+ out_8(pixis_base + PIXIS_VCLKH, vclkh);
+ out_8(pixis_base + PIXIS_VCLKL, vclkl);
+
+ out_8(pixis_base + PIXIS_AUX, sysclk_aux);
+
+ return 1;
+}
+
+/* Set the CFG_SYSPLL bits
+ *
+ * This only has effect if PX_VCFGEN0[SYSPLL]=1, which is true if
+ * read_from_px_regs() is called.
+ */
+static int set_px_mpxpll(unsigned long mpxpll)
+{
+ switch (mpxpll) {
+ case 2:
+ case 4:
+ case 6:
+ case 8:
+ case 10:
+ case 12:
+ case 14:
+ case 16:
+ clrsetbits_8(pixis_base + PIXIS_VSPEED1, 0x1F, mpxpll);
+ return 1;
+ }
+
+ printf("Unsupported MPXPLL ratio.\n");
+ return 0;
+}
+
+static int set_px_corepll(unsigned long corepll)
+{
+ u8 val;
+
+ switch (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;
+ }
+
+ clrsetbits_8(pixis_base + PIXIS_VSPEED0, 0x1F, val);
+ return 1;
+}
+
+#ifndef CONFIG_SYS_PIXIS_VCFGEN0_ENABLE
+#define CONFIG_SYS_PIXIS_VCFGEN0_ENABLE 0x1C
+#endif
+
+/* Tell the PIXIS where to find the COREPLL, MPXPLL, SYSCLK values
+ *
+ * The PIXIS can be programmed to look at either the on-board dip switches
+ * or various other PIXIS registers to determine the values for COREPLL,
+ * MPXPLL, and SYSCLK.
+ *
+ * CONFIG_SYS_PIXIS_VCFGEN0_ENABLE is the value to write to the PIXIS_VCFGEN0
+ * register that tells the pixis to use the various PIXIS register.
+ */
+static void read_from_px_regs(int set)
+{
+ u8 tmp = in_8(pixis_base + PIXIS_VCFGEN0);
+
+ if (set)
+ tmp = tmp | CONFIG_SYS_PIXIS_VCFGEN0_ENABLE;
+ else
+ tmp = tmp & ~CONFIG_SYS_PIXIS_VCFGEN0_ENABLE;
+
+ out_8(pixis_base + PIXIS_VCFGEN0, tmp);
+}
+
+/* CONFIG_SYS_PIXIS_VBOOT_ENABLE is the value to write to the PX_VCFGEN1
+ * register that tells the pixis to use the PX_VBOOT[LBMAP] register.
+ */
+#ifndef CONFIG_SYS_PIXIS_VBOOT_ENABLE
+#define CONFIG_SYS_PIXIS_VBOOT_ENABLE 0x04
+#endif
+
+/* Configure the source of the boot location
+ *
+ * The PIXIS can be programmed to look at either the on-board dip switches
+ * or the PX_VBOOT[LBMAP] register to determine where we should boot.
+ *
+ * If we want to boot from the alternate boot bank, we need to tell the PIXIS
+ * to ignore the on-board dip switches and use the PX_VBOOT[LBMAP] instead.
+ */
+static void read_from_px_regs_altbank(int set)
+{
+ u8 tmp = in_8(pixis_base + PIXIS_VCFGEN1);
+
+ if (set)
+ tmp = tmp | CONFIG_SYS_PIXIS_VBOOT_ENABLE;
+ else
+ tmp = tmp & ~CONFIG_SYS_PIXIS_VBOOT_ENABLE;
+
+ out_8(pixis_base + PIXIS_VCFGEN1, tmp);
+}
+
+/* CONFIG_SYS_PIXIS_VBOOT_MASK contains the bits to set in VBOOT register that
+ * tells the PIXIS what the alternate flash bank is.
+ *
+ * Note that it's not really a mask. It contains the actual LBMAP bits that
+ * must be set to select the alternate bank. This code assumes that the
+ * primary bank has these bits set to 0, and the alternate bank has these
+ * bits set to 1.
+ */
+#ifndef CONFIG_SYS_PIXIS_VBOOT_MASK
+#define CONFIG_SYS_PIXIS_VBOOT_MASK (0x40)
+#endif
+
+/* Tell the PIXIS to boot from the default flash bank
+ *
+ * Program the default flash bank into the VBOOT register. This register is
+ * used only if PX_VCFGEN1[FLASH]=1.
+ */
+static void clear_altbank(void)
+{
+ clrbits_8(pixis_base + PIXIS_VBOOT, CONFIG_SYS_PIXIS_VBOOT_MASK);
+}
+
+/* Tell the PIXIS to boot from the alternate flash bank
+ *
+ * Program the alternate flash bank into the VBOOT register. This register is
+ * used only if PX_VCFGEN1[FLASH]=1.
+ */
+static void set_altbank(void)
+{
+ setbits_8(pixis_base + PIXIS_VBOOT, CONFIG_SYS_PIXIS_VBOOT_MASK);
+}
+
+/* Reset the board with watchdog disabled.
+ *
+ * This respects the altbank setting.
+ */
+static void set_px_go(void)
+{
+ /* Disable the VELA sequencer and watchdog */
+ clrbits_8(pixis_base + PIXIS_VCTL, 9);
+
+ /* Reboot by starting the VELA sequencer */
+ setbits_8(pixis_base + PIXIS_VCTL, 0x1);
+
+ while (1);
+}
+
+/* Reset the board with watchdog enabled.
+ *
+ * This respects the altbank setting.
+ */
+static void set_px_go_with_watchdog(void)
+{
+ /* Disable the VELA sequencer */
+ clrbits_8(pixis_base + PIXIS_VCTL, 1);
+
+ /* Enable the watchdog and reboot by starting the VELA sequencer */
+ setbits_8(pixis_base + PIXIS_VCTL, 0x9);
+
+ while (1);
+}
+
+/* Disable the watchdog
+ *
+ */
+static int pixis_disable_watchdog_cmd(cmd_tbl_t *cmdtp, int flag, int argc,
+ char * const argv[])
+{
+ /* Disable the VELA sequencer and the watchdog */
+ clrbits_8(pixis_base + PIXIS_VCTL, 9);
+
+ return 0;
+}
+
+U_BOOT_CMD(
+ diswd, 1, 0, pixis_disable_watchdog_cmd,
+ "Disable watchdog timer",
+ ""
+);
+
+#ifdef CONFIG_PIXIS_SGMII_CMD
+
+/* Enable or disable SGMII mode for a TSEC
+ */
+static int pixis_set_sgmii(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ int which_tsec = -1;
+ unsigned char mask;
+ unsigned char switch_mask;
+
+ if ((argc > 2) && (strcmp(argv[1], "all") != 0))
+ which_tsec = simple_strtoul(argv[1], NULL, 0);
+
+ switch (which_tsec) {
+#ifdef CONFIG_TSEC1
+ case 1:
+ mask = PIXIS_VSPEED2_TSEC1SER;
+ switch_mask = PIXIS_VCFGEN1_TSEC1SER;
+ break;
+#endif
+#ifdef CONFIG_TSEC2
+ case 2:
+ mask = PIXIS_VSPEED2_TSEC2SER;
+ switch_mask = PIXIS_VCFGEN1_TSEC2SER;
+ break;
+#endif
+#ifdef CONFIG_TSEC3
+ case 3:
+ mask = PIXIS_VSPEED2_TSEC3SER;
+ switch_mask = PIXIS_VCFGEN1_TSEC3SER;
+ break;
+#endif
+#ifdef CONFIG_TSEC4
+ case 4:
+ mask = PIXIS_VSPEED2_TSEC4SER;
+ switch_mask = PIXIS_VCFGEN1_TSEC4SER;
+ break;
+#endif
+ default:
+ mask = PIXIS_VSPEED2_MASK;
+ switch_mask = PIXIS_VCFGEN1_MASK;
+ break;
+ }
+
+ /* Toggle whether the switches or FPGA control the settings */
+ if (!strcmp(argv[argc - 1], "switch"))
+ clrbits_8(pixis_base + PIXIS_VCFGEN1, switch_mask);
+ else
+ setbits_8(pixis_base + PIXIS_VCFGEN1, switch_mask);
+
+ /* If it's not the switches, enable or disable SGMII, as specified */
+ if (!strcmp(argv[argc - 1], "on"))
+ clrbits_8(pixis_base + PIXIS_VSPEED2, mask);
+ else if (!strcmp(argv[argc - 1], "off"))
+ setbits_8(pixis_base + PIXIS_VSPEED2, mask);
+
+ return 0;
+}
+
+U_BOOT_CMD(
+ pixis_set_sgmii, CONFIG_SYS_MAXARGS, 1, pixis_set_sgmii,
+ "pixis_set_sgmii"
+ " - Enable or disable SGMII mode for a given TSEC \n",
+ "\npixis_set_sgmii [TSEC num] <on|off|switch>\n"
+ " TSEC num: 1,2,3,4 or 'all'. 'all' is default.\n"
+ " on - enables SGMII\n"
+ " off - disables SGMII\n"
+ " switch - use switch settings"
+);
+
+#endif
+
+/*
+ * 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 unsigned long strfractoint(char *strptr)
+{
+ int i, j;
+ int mulconst;
+ int no_dec = 0;
+ unsigned long intval = 0, decval = 0;
+ char 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] != '.') {
+ if (strptr[i] == 0) {
+ no_dec = 1;
+ break;
+ }
+ intarr[i] = strptr[i];
+ 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] >= '0') && (strptr[i] <= '9')) {
+ decarr[j] = strptr[i];
+ i++;
+ j++;
+ }
+
+ decarr[j] = '\0';
+
+ mulconst = 1;
+ for (i = 0; i < j; i++)
+ mulconst *= 10;
+ decval = simple_strtoul(decarr, NULL, 10);
+ }
+
+ intval = simple_strtoul(intarr, NULL, 10);
+ intval = intval * mulconst;
+
+ return intval + decval;
+}
+
+static int pixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ unsigned int i;
+ char *p_cf = NULL;
+ char *p_cf_sysclk = NULL;
+ char *p_cf_corepll = NULL;
+ char *p_cf_mpxpll = NULL;
+ char *p_altbank = NULL;
+ char *p_wd = NULL;
+ int unknown_param = 0;
+
+ /*
+ * No args is a simple reset request.
+ */
+ if (argc <= 1) {
+ pixis_reset();
+ /* not reached */
+ }
+
+ for (i = 1; i < argc; i++) {
+ if (strcmp(argv[i], "cf") == 0) {
+ p_cf = argv[i];
+ if (i + 3 >= argc) {
+ break;
+ }
+ p_cf_sysclk = argv[i+1];
+ p_cf_corepll = argv[i+2];
+ p_cf_mpxpll = argv[i+3];
+ i += 3;
+ continue;
+ }
+
+ if (strcmp(argv[i], "altbank") == 0) {
+ p_altbank = argv[i];
+ continue;
+ }
+
+ if (strcmp(argv[i], "wd") == 0) {
+ p_wd = argv[i];
+ continue;
+ }
+
+ unknown_param = 1;
+ }
+
+ /*
+ * Check that cf has all required parms
+ */
+ if ((p_cf && !(p_cf_sysclk && p_cf_corepll && p_cf_mpxpll))
+ || unknown_param) {
+#ifdef CONFIG_SYS_LONGHELP
+ puts(cmdtp->help);
+ putc('\n');
+#endif
+ return 1;
+ }
+
+ /*
+ * PIXIS seems to be sensitive to the ordering of
+ * the registers that are touched.
+ */
+ read_from_px_regs(0);
+
+ if (p_altbank)
+ read_from_px_regs_altbank(0);
+
+ clear_altbank();
+
+ /*
+ * Clock configuration specified.
+ */
+ if (p_cf) {
+ unsigned long sysclk;
+ unsigned long corepll;
+ unsigned long mpxpll;
+
+ sysclk = simple_strtoul(p_cf_sysclk, NULL, 10);
+ corepll = strfractoint(p_cf_corepll);
+ mpxpll = simple_strtoul(p_cf_mpxpll, NULL, 10);
+
+ if (!(set_px_sysclk(sysclk)
+ && set_px_corepll(corepll)
+ && set_px_mpxpll(mpxpll))) {
+#ifdef CONFIG_SYS_LONGHELP
+ puts(cmdtp->help);
+ putc('\n');
+#endif
+ return 1;
+ }
+ read_from_px_regs(1);
+ }
+
+ /*
+ * Altbank specified
+ *
+ * NOTE CHANGE IN BEHAVIOR: previous code would default
+ * to enabling watchdog if altbank is specified.
+ * Now the watchdog must be enabled explicitly using 'wd'.
+ */
+ if (p_altbank) {
+ set_altbank();
+ read_from_px_regs_altbank(1);
+ }
+
+ /*
+ * Reset with watchdog specified.
+ */
+ if (p_wd)
+ set_px_go_with_watchdog();
+ else
+ set_px_go();
+
+ /*
+ * Shouldn't be reached.
+ */
+ return 0;
+}
+
+
+U_BOOT_CMD(
+ pixis_reset, CONFIG_SYS_MAXARGS, 1, pixis_reset_cmd,
+ "Reset the board using the FPGA sequencer",
+ " 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>"
+);
Code Review / kvmfornfv.git / blobdiff