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Diffstat (limited to 'board/mpc8641hpcn/pixis.c')
| -rw-r--r-- | board/mpc8641hpcn/pixis.c | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/board/mpc8641hpcn/pixis.c b/board/mpc8641hpcn/pixis.c new file mode 100644 index 0000000..f226b3e --- /dev/null +++ b/board/mpc8641hpcn/pixis.c @@ -0,0 +1,324 @@ +/* + * 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 <watchdog.h> +#include <command.h> +#include <asm/cache.h> +#include <mpc86xx.h> + +#include "pixis.h" + + +/* + * 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 disable_watchdog(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, disable_watchdog, + "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] + */ + +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; +} |