/*
- * Copyright 2006 Freescale Semiconductor
+ * Copyright 2006,2010 Freescale Semiconductor
* Jeff Brown
* Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
*
#include <common.h>
#include <command.h>
-#include <watchdog.h>
-#include <asm/cache.h>
#include <asm/io.h>
-#include "pixis.h"
-
-
-static ulong strfractoint(uchar *strptr);
-
+#define pixis_base (u8 *)PIXIS_BASE
/*
* Simple board reset.
*/
void pixis_reset(void)
{
- u8 *pixis_base = (u8 *)PIXIS_BASE;
out_8(pixis_base + PIXIS_RST, 0);
-}
+ while (1);
+}
/*
* Per table 27, page 58 of MPC8641HPCN spec.
*/
-int set_px_sysclk(ulong sysclk)
+static int set_px_sysclk(unsigned long sysclk)
{
u8 sysclk_s, sysclk_r, sysclk_v, vclkh, vclkl, sysclk_aux;
- u8 *pixis_base = (u8 *)PIXIS_BASE;
switch (sysclk) {
case 33:
return 1;
}
-
-int set_px_mpxpll(ulong mpxpll)
+/* 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)
{
- u8 tmp;
- u8 val;
- u8 *pixis_base = (u8 *)PIXIS_BASE;
-
switch (mpxpll) {
case 2:
case 4:
case 12:
case 14:
case 16:
- val = (u8) mpxpll;
- break;
- default:
- printf("Unsupported MPXPLL ratio.\n");
- return 0;
+ clrsetbits_8(pixis_base + PIXIS_VSPEED1, 0x1F, mpxpll);
+ return 1;
}
- tmp = in_8(pixis_base + PIXIS_VSPEED1);
- tmp = (tmp & 0xF0) | (val & 0x0F);
- out_8(pixis_base + PIXIS_VSPEED1, tmp);
-
- return 1;
+ printf("Unsupported MPXPLL ratio.\n");
+ return 0;
}
-
-int set_px_corepll(ulong corepll)
+static int set_px_corepll(unsigned long corepll)
{
- u8 tmp;
u8 val;
- u8 *pixis_base = (u8 *)PIXIS_BASE;
- switch ((int)corepll) {
+ switch (corepll) {
case 20:
val = 0x08;
break;
return 0;
}
- tmp = in_8(pixis_base + PIXIS_VSPEED0);
- tmp = (tmp & 0xE0) | (val & 0x1F);
- out_8(pixis_base + PIXIS_VSPEED0, tmp);
-
+ clrsetbits_8(pixis_base + PIXIS_VSPEED0, 0x1F, val);
return 1;
}
+#ifndef CONFIG_SYS_PIXIS_VCFGEN0_ENABLE
+#define CONFIG_SYS_PIXIS_VCFGEN0_ENABLE 0x1C
+#endif
-void read_from_px_regs(int set)
+/* 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 *pixis_base = (u8 *)PIXIS_BASE;
- u8 mask = 0x1C; /* COREPLL, MPXPLL, SYSCLK controlled by PIXIS */
u8 tmp = in_8(pixis_base + PIXIS_VCFGEN0);
if (set)
- tmp = tmp | mask;
+ tmp = tmp | CONFIG_SYS_PIXIS_VCFGEN0_ENABLE;
else
- tmp = tmp & ~mask;
+ 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
-void read_from_px_regs_altbank(int set)
+/* 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 *pixis_base = (u8 *)PIXIS_BASE;
- u8 mask = 0x04; /* FLASHBANK and FLASHMAP controlled by PIXIS */
u8 tmp = in_8(pixis_base + PIXIS_VCFGEN1);
if (set)
- tmp = tmp | mask;
+ tmp = tmp | CONFIG_SYS_PIXIS_VBOOT_ENABLE;
else
- tmp = tmp & ~mask;
+ 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
-void clear_altbank(void)
+/* 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)
{
- u8 tmp;
- u8 *pixis_base = (u8 *)PIXIS_BASE;
-
- tmp = in_8(pixis_base + PIXIS_VBOOT);
- tmp &= ~CONFIG_SYS_PIXIS_VBOOT_MASK;
-
- out_8(pixis_base + PIXIS_VBOOT, tmp);
+ clrbits_8(pixis_base + PIXIS_VBOOT, CONFIG_SYS_PIXIS_VBOOT_MASK);
}
-
-void set_altbank(void)
+/* 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)
{
- u8 tmp;
- u8 *pixis_base = (u8 *)PIXIS_BASE;
-
- tmp = in_8(pixis_base + PIXIS_VBOOT);
- tmp |= CONFIG_SYS_PIXIS_VBOOT_MASK;
-
- out_8(pixis_base + PIXIS_VBOOT, tmp);
+ setbits_8(pixis_base + PIXIS_VBOOT, CONFIG_SYS_PIXIS_VBOOT_MASK);
}
-
-void set_px_go(void)
+/* Reset the board with watchdog disabled.
+ *
+ * This respects the altbank setting.
+ */
+static void set_px_go(void)
{
- u8 tmp;
- u8 *pixis_base = (u8 *)PIXIS_BASE;
+ /* Disable the VELA sequencer and watchdog */
+ clrbits_8(pixis_base + PIXIS_VCTL, 9);
- tmp = in_8(pixis_base + PIXIS_VCTL);
- tmp = tmp & 0x1E; /* clear GO bit */
- out_8(pixis_base + PIXIS_VCTL, tmp);
+ /* Reboot by starting the VELA sequencer */
+ setbits_8(pixis_base + PIXIS_VCTL, 0x1);
- tmp = in_8(pixis_base + PIXIS_VCTL);
- tmp = tmp | 0x01; /* set GO bit - start reset sequencer */
- out_8(pixis_base + PIXIS_VCTL, tmp);
+ while (1);
}
-
-void set_px_go_with_watchdog(void)
+/* Reset the board with watchdog enabled.
+ *
+ * This respects the altbank setting.
+ */
+static void set_px_go_with_watchdog(void)
{
- u8 tmp;
- u8 *pixis_base = (u8 *)PIXIS_BASE;
+ /* Disable the VELA sequencer */
+ clrbits_8(pixis_base + PIXIS_VCTL, 1);
- tmp = in_8(pixis_base + PIXIS_VCTL);
- tmp = tmp & 0x1E;
- out_8(pixis_base + PIXIS_VCTL, tmp);
+ /* Enable the watchdog and reboot by starting the VELA sequencer */
+ setbits_8(pixis_base + PIXIS_VCTL, 0x9);
- tmp = in_8(pixis_base + PIXIS_VCTL);
- tmp = tmp | 0x09;
- out_8(pixis_base + PIXIS_VCTL, tmp);
+ while (1);
}
-
-int pixis_disable_watchdog_cmd(cmd_tbl_t *cmdtp,
- int flag, int argc, char *argv[])
+/* Disable the watchdog
+ *
+ */
+static int pixis_disable_watchdog_cmd(cmd_tbl_t *cmdtp, int flag, int argc,
+ char *argv[])
{
- u8 tmp;
- u8 *pixis_base = (u8 *)PIXIS_BASE;
-
- tmp = in_8(pixis_base + PIXIS_VCTL);
- tmp = tmp & 0x1E;
- out_8(pixis_base + PIXIS_VCTL, tmp);
-
- /* setting VCTL[WDEN] to 0 to disable watch dog */
- tmp = in_8(pixis_base + PIXIS_VCTL);
- tmp &= ~0x08;
- out_8(pixis_base + PIXIS_VCTL, tmp);
+ /* Disable the VELA sequencer and the watchdog */
+ clrbits_8(pixis_base + PIXIS_VCTL, 9);
return 0;
}
);
#ifdef CONFIG_PIXIS_SGMII_CMD
-int pixis_set_sgmii(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+
+/* Enable or disable SGMII mode for a TSEC
+ */
+static int pixis_set_sgmii(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
int which_tsec = -1;
- u8 *pixis_base = (u8 *)PIXIS_BASE;
- uchar mask;
- uchar switch_mask;
+ unsigned char mask;
+ unsigned char switch_mask;
- if (argc > 2)
- if (strcmp(argv[1], "all") != 0)
- which_tsec = simple_strtoul(argv[1], NULL, 0);
+ if ((argc > 2) && (strcmp(argv[1], "all") != 0))
+ which_tsec = simple_strtoul(argv[1], NULL, 0);
switch (which_tsec) {
#ifdef CONFIG_TSEC1
" off - disables SGMII\n"
" switch - use switch settings"
);
+
#endif
/*
* FPGA register values.
* input: strptr i.e. argv[2]
*/
-
-static ulong strfractoint(uchar *strptr)
+static unsigned long strfractoint(char *strptr)
{
- int i, j, retval;
+ int i, j;
int mulconst;
- int intarr_len = 0, decarr_len = 0, no_dec = 0;
- ulong intval = 0, decval = 0;
- uchar intarr[3], decarr[3];
+ int intarr_len, 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.
j++;
}
- decarr_len = j;
decarr[j] = '\0';
mulconst = 1;
- for (i = 0; i < decarr_len; i++)
+ for (i = 0; i < j; i++)
mulconst *= 10;
- decval = simple_strtoul((char *)decarr, NULL, 10);
+ decval = simple_strtoul(decarr, NULL, 10);
}
- intval = simple_strtoul((char *)intarr, NULL, 10);
+ intval = simple_strtoul(intarr, NULL, 10);
intval = intval * mulconst;
- retval = intval + decval;
-
- return retval;
+ return intval + decval;
}
-
-int
-pixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+static int pixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
unsigned int i;
char *p_cf = NULL;
char *p_cf_mpxpll = NULL;
char *p_altbank = NULL;
char *p_wd = NULL;
- unsigned int unknown_param = 0;
+ int unknown_param = 0;
/*
* No args is a simple reset request.
*/
read_from_px_regs(0);
- if (p_altbank) {
+ if (p_altbank)
read_from_px_regs_altbank(0);
- }
+
clear_altbank();
/*
unsigned long mpxpll;
sysclk = simple_strtoul(p_cf_sysclk, NULL, 10);
- corepll = strfractoint((uchar *) p_cf_corepll);
+ corepll = strfractoint(p_cf_corepll);
mpxpll = simple_strtoul(p_cf_mpxpll, NULL, 10);
if (!(set_px_sysclk(sysclk)
/*
* Reset with watchdog specified.
*/
- if (p_wd) {
+ if (p_wd)
set_px_go_with_watchdog();
- } else {
+ else
set_px_go();
- }
/*
* Shouldn't be reached.
projects / oweals / u-boot.git / commitdiff