diff options
Diffstat (limited to 'board/freescale/common/pixis.c')
| -rw-r--r-- | board/freescale/common/pixis.c | 254 |
1 files changed, 126 insertions, 128 deletions
diff --git a/board/freescale/common/pixis.c b/board/freescale/common/pixis.c index 7210512..119eaf9 100644 --- a/board/freescale/common/pixis.c +++ b/board/freescale/common/pixis.c @@ -1,5 +1,5 @@ /* - * Copyright 2006 Freescale Semiconductor + * Copyright 2006,2010 Freescale Semiconductor * Jeff Brown * Srikanth Srinivasan (srikanth.srinivasan@freescale.com) * @@ -24,33 +24,26 @@ #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: @@ -117,13 +110,13 @@ int set_px_sysclk(ulong sysclk) 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: @@ -133,28 +126,19 @@ int set_px_mpxpll(ulong mpxpll) 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; @@ -178,113 +162,132 @@ int set_px_corepll(ulong corepll) 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; } @@ -296,16 +299,17 @@ U_BOOT_CMD( ); #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 @@ -363,6 +367,7 @@ U_BOOT_CMD( " off - disables SGMII\n" " switch - use switch settings" ); + #endif /* @@ -371,14 +376,13 @@ U_BOOT_CMD( * 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. @@ -412,26 +416,21 @@ static ulong strfractoint(uchar *strptr) 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; @@ -440,7 +439,7 @@ pixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) 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. @@ -493,9 +492,9 @@ pixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) */ read_from_px_regs(0); - if (p_altbank) { + if (p_altbank) read_from_px_regs_altbank(0); - } + clear_altbank(); /* @@ -507,7 +506,7 @@ pixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) 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) @@ -536,11 +535,10 @@ pixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) /* * Reset with watchdog specified. */ - if (p_wd) { + if (p_wd) set_px_go_with_watchdog(); - } else { + else set_px_go(); - } /* * Shouldn't be reached. |