IIM (IC Identification Module) is the fusebox for the mpc5121. Use #define CONFIG_IIM to turn on the clock for this module use #define CONFIG_CMD_FUSE to add fusebox commands. Fusebox commands include the ability to read the status, read the register cache, override the register cache, program the fuses and sense them. Signed-off-by: Martha Marx <mmarx@silicontkx.com> Signed-off-by: John Rigby <jrigby@freescale.com>master
Martha Marx
16 years ago
committed by
John Rigby
parent
14d19cd1bc
commit
abfbd0ae49
@ -0,0 +1,394 @@ |
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/*
|
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* Copyright 2008 Silicon Turnkey Express, Inc. |
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* Martha Marx <mmarx@silicontkx.com> |
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* |
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* ADS5121 IIM (Fusebox) Interface |
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* |
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* See file CREDITS for list of people who contributed to this |
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* project. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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*/ |
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#include <common.h> |
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#include <command.h> |
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#include <asm/io.h> |
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#ifdef CONFIG_CMD_FUSE |
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DECLARE_GLOBAL_DATA_PTR; |
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static char cur_bank = '1'; |
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char *iim_err_msg(u32 err) |
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{ |
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static char *IIM_errs[] = { |
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"Parity Error in cache", |
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"Explicit Sense Cycle Error", |
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"Write to Locked Register Error", |
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"Read Protect Error", |
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"Override Protect Error", |
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"Write Protect Error"}; |
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int i; |
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if (!err) |
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return ""; |
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for (i = 1; i < 8; i++) |
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if (err & (1 << i)) |
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printf("IIM - %s\n", IIM_errs[i-1]); |
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return ""; |
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} |
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int in_range(int n, int min, int max, char *err, char *usg) |
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{ |
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if (n > max || n < min) { |
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printf(err); |
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printf("Usage:\n%s\n", usg); |
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return 0; |
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} |
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return 1; |
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} |
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int ads5121_fuse_read(int bank, int fstart, int num) |
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{ |
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iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim; |
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u32 *iim_fb, dummy; |
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int f, ctr; |
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out_be32(&iim->err, in_be32(&iim->err)); |
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if (bank == 0) |
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iim_fb = (u32 *)&(iim->fbac0); |
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else |
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iim_fb = (u32 *)&(iim->fbac1); |
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/* try a read to see if Read Protect is set */ |
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dummy = in_be32(&iim_fb[0]); |
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if (in_be32(&iim->err) & IIM_ERR_RPE) { |
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printf("\tRead protect fuse is set\n"); |
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out_be32(&iim->err, IIM_ERR_RPE); |
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return 0; |
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} |
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printf("Reading Bank %d cache\n", bank); |
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for (f = fstart, ctr = 0; num > 0; ctr++, num--, f++) { |
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if (ctr % 4 == 0) |
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printf("F%2d:", f); |
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printf("\t%#04x", (u8)(iim_fb[f])); |
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if (ctr % 4 == 3) |
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printf("\n"); |
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} |
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if (ctr % 4 != 0) |
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printf("\n"); |
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} |
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int ads5121_fuse_override(int bank, int f, u8 val) |
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{ |
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iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim; |
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u32 *iim_fb; |
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u32 iim_stat; |
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int i; |
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out_be32(&iim->err, in_be32(&iim->err)); |
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if (bank == 0) |
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iim_fb = (u32 *)&(iim->fbac0); |
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else |
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iim_fb = (u32 *)&(iim->fbac1); |
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/* try a read to see if Read Protect is set */ |
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iim_stat = in_be32(&iim_fb[0]); |
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if (in_be32(&iim->err) & IIM_ERR_RPE) { |
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printf("Read protect fuse is set on bank %d;" |
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"Override protect may also be set\n", bank); |
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printf("An attempt will be made to override\n"); |
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out_be32(&iim->err, IIM_ERR_RPE); |
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} |
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if (iim_stat & IIM_FBAC_FBOP) { |
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printf("Override protect fuse is set on bank %d\n", bank); |
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return 1; |
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} |
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if (f > IIM_FMAX) /* reset the entire bank */ |
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for (i = 0; i < IIM_FMAX + 1; i++) |
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out_be32(&iim_fb[i], 0); |
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else |
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out_be32(&iim_fb[f], val); |
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return 0; |
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} |
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int ads5121_fuse_prog(cmd_tbl_t *cmdtp, int bank, char *fuseno_bitno) |
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{ |
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iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim; |
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int f, i, bitno; |
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u32 stat, err; |
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f = simple_strtol(fuseno_bitno, NULL, 10); |
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if (f == 0 && fuseno_bitno[0] != '0') |
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f = -1; |
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if (!in_range(f, 0, IIM_FMAX, |
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"<frow> must be between 0-31\n\n", cmdtp->usage)) |
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return 1; |
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bitno = -1; |
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for (i = 0; i < 6; i++) { |
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if (fuseno_bitno[i] == '_') { |
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bitno = simple_strtol(&(fuseno_bitno[i+1]), NULL, 10); |
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if (bitno == 0 && fuseno_bitno[i+1] != '0') |
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bitno = -1; |
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break; |
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} |
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} |
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if (!in_range(bitno, 0, 7, "Bit number ranges from 0-7\n" |
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"Example of <frow_bitno>: \"18_4\" sets bit 4 of row 18\n", |
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cmdtp->usage)) |
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return 1; |
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out_be32(&iim->err, in_be32(&iim->err)); |
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out_be32(&iim->prg_p, IIM_PRG_P_SET); |
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out_be32(&iim->ua, IIM_SET_UA(bank, f)); |
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out_be32(&iim->la, IIM_SET_LA(f, bitno)); |
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#ifdef DEBUG |
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printf("Programming disabled with DEBUG defined \n"); |
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printf(""Set up to pro |
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printf("iim.ua = %x; iim.la = %x\n", iim->ua, iim->la); |
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#else |
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out_be32(&iim->fctl, IIM_FCTL_PROG_PULSE | IIM_FCTL_PROG); |
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do |
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udelay(20); |
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while ((stat = in_be32(&iim->stat)) & IIM_STAT_BUSY); |
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out_be32(&iim->prg_p, 0); |
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err = in_be32(&iim->err); |
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if (stat & IIM_STAT_PRGD) { |
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if (!(err & (IIM_ERR_WPE | IIM_ERR_WPE))) { |
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printf("Fuse is successfully set"); |
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if (err) |
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printf(" - however there are other errors"); |
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printf("\n"); |
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} |
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iim->stat = 0; |
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} |
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if (err) { |
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iim_err_msg(err); |
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out_be32(&iim->err, in_be32(&iim->err)); |
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} |
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#endif |
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} |
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int ads5121_fuse_sense(int bank, int fstart, int num) |
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{ |
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iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim; |
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u32 iim_fbac; |
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u32 stat, err, err_hold = 0; |
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int f, ctr; |
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out_be32(&iim->err, in_be32(&iim->err)); |
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if (bank == 0) |
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iim_fbac = in_be32(&iim->fbac0); |
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else |
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iim_fbac = in_be32(&iim->fbac1); |
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if (iim_fbac & IIM_FBAC_FBESP) { |
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printf("\tSense Protect disallows this operation\n"); |
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out_be32(&iim->err, IIM_FBAC_FBESP); |
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return 1; |
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} |
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err = in_be32(&iim->err); |
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if (err) { |
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iim_err_msg(err); |
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err_hold |= err; |
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} |
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if (err & IIM_ERR_RPE) |
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printf("\tRead protect fuse is set; " |
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"Sense Protect may be set but will be attempted\n"); |
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if (err) |
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out_be32(&iim->err, err); |
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printf("Sensing fuse(s) on Bank %d\n", bank); |
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for (f = fstart, ctr = 0; num > 0; ctr++, f++, num--) { |
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out_be32(&iim->ua, IIM_SET_UA(bank, f)); |
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out_be32(&iim->la, IIM_SET_LA(f, 0)); |
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out_be32(&iim->fctl, IIM_FCTL_ESNS_N); |
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do |
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udelay(20); |
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while ((stat = in_be32(&iim->stat)) & IIM_STAT_BUSY); |
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err = in_be32(&iim->err); |
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if (err & IIM_ERR_SNSE) { |
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iim_err_msg(err); |
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out_be32(&iim->err, IIM_ERR_SNSE); |
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return 1; |
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} |
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if (stat & IIM_STAT_SNSD) { |
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out_be32(&iim->stat, 0); |
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if (ctr % 4 == 0) |
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printf("F%2d:", f); |
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printf("\t%#04x", (u8)iim->sdat); |
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if (ctr % 4 == 3) |
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printf("\n"); |
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} |
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if (err) { |
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err_hold |= err; |
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out_be32(&iim->err, err); |
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} |
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} |
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if (ctr % 4 != 0) |
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printf("\n"); |
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if (err_hold) |
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iim_err_msg(err_hold); |
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return 0; |
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} |
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int ads5121_fuse_stat(int bank) |
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{ |
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iim512x_t *iim = &((immap_t *) CONFIG_SYS_IMMR)->iim; |
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u32 iim_fbac; |
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u32 err; |
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out_be32(&iim->err, in_be32(&iim->err)); |
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if (bank == 0) |
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iim_fbac = in_be32(&iim->fbac0); |
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else |
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iim_fbac = in_be32(&iim->fbac1); |
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err = in_be32(&iim->err); |
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if (err) |
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iim_err_msg(err); |
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if (err & IIM_ERR_RPE || iim_fbac & IIM_FBAC_FBRP) { |
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if (iim_fbac == 0) |
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printf("Since protection settings can't be read - " |
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"try sensing fuse row 0;\n"); |
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return 0; |
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} |
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if (iim_fbac & IIM_PROTECTION) |
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printf("Protection Fuses Bank %d = %#04x:\n", bank, iim_fbac); |
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else if (!(err & IIM_ERR_RPE)) |
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printf("No Protection fuses are set\n"); |
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if (iim_fbac & IIM_FBAC_FBWP) |
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printf("\tWrite Protect fuse is set\n"); |
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if (iim_fbac & IIM_FBAC_FBOP) |
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printf("\tOverride Protect fuse is set\n"); |
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if (iim_fbac & IIM_FBAC_FBESP) |
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printf("\tSense Protect Fuse is set\n"); |
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out_be32(&iim->err, in_be32(&iim->err)); |
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return 0; |
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} |
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int do_ads5121_fuse(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) |
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{ |
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int frow, n, v, bank; |
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if (cur_bank == '0') |
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bank = 0; |
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else |
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bank = 1; |
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switch (argc) { |
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case 0: |
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case 1: |
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printf("Usage:\n%s\n", cmdtp->usage); |
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return 1; |
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case 2: |
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if (strncmp(argv[1], "stat", 4) == 0) |
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return ads5121_fuse_stat(bank); |
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if (strncmp(argv[1], "read", 4) == 0) |
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return ads5121_fuse_read(bank, 0, IIM_FMAX + 1); |
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if (strncmp(argv[1], "sense", 5) == 0) |
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return ads5121_fuse_sense(bank, 0, IIM_FMAX + 1); |
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if (strncmp(argv[1], "ovride", 6) == 0) |
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return ads5121_fuse_override(bank, IIM_FMAX + 1, 0); |
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if (strncmp(argv[1], "bank", 4) == 0) { |
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printf("Active Fuse Bank is %c\n", cur_bank); |
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return 0; |
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} |
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printf("Usage:\n%s\n", cmdtp->usage); |
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return 1; |
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case 3: |
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if (strncmp(argv[1], "bank", 4) == 0) { |
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if (argv[2][0] == '0') |
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cur_bank = '0'; |
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else if (argv[2][0] == '1') |
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cur_bank = '1'; |
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else { |
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printf("Usage:\n%s\n", cmdtp->usage); |
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return 1; |
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} |
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printf("Setting Active Fuse Bank to %c\n", cur_bank); |
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return 0; |
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} |
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if (strncmp(argv[1], "prog", 4) == 0) |
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return ads5121_fuse_prog(cmdtp, bank, argv[2]); |
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frow = (int)simple_strtol(argv[2], NULL, 10); |
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if (frow == 0 && argv[2][0] != '0') |
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frow = -1; |
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if (!in_range(frow, 0, IIM_FMAX, |
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"<frow> must be between 0-31\n\n", cmdtp->usage)) |
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return 1; |
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if (strncmp(argv[1], "read", 4) == 0) |
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return ads5121_fuse_read(bank, frow, 1); |
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if (strncmp(argv[1], "ovride", 6) == 0) |
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return ads5121_fuse_override(bank, frow, 0); |
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if (strncmp(argv[1], "sense", 5) == 0) |
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return ads5121_fuse_sense(bank, frow, 1); |
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printf("Usage:\n%s\n", cmdtp->usage); |
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return 1; |
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case 4: |
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frow = (int)simple_strtol(argv[2], NULL, 10); |
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if (frow == 0 && argv[2][0] != '0') |
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frow = -1; |
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if (!in_range(frow, 0, IIM_FMAX, |
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"<frow> must be between 0-31\n\n", cmdtp->usage)) |
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return 1; |
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if (strncmp(argv[1], "read", 4) == 0) { |
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n = (int)simple_strtol(argv[3], NULL, 10); |
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if (!in_range(frow + n, frow + 1, IIM_FMAX + 1, |
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"<frow>+<n> must be between 1-32\n\n", |
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cmdtp->usage)) |
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return 1; |
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return ads5121_fuse_read(bank, frow, n); |
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} |
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if (strncmp(argv[1], "ovride", 6) == 0) { |
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v = (int)simple_strtol(argv[3], NULL, 10); |
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return ads5121_fuse_override(bank, frow, v); |
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} |
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if (strncmp(argv[1], "sense", 5) == 0) { |
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n = (int)simple_strtol(argv[3], NULL, 10); |
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if (!in_range(frow + n, frow + 1, IIM_FMAX + 1, |
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"<frow>+<n> must be between 1-32\n\n", |
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cmdtp->usage)) |
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return 1; |
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return ads5121_fuse_sense(bank, frow, n); |
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} |
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printf("Usage:\n%s\n", cmdtp->usage); |
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return 1; |
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default: /* at least 5 args */ |
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printf("Usage:\n%s\n", cmdtp->usage); |
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return 1; |
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} |
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} |
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U_BOOT_CMD( |
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fuse, CONFIG_SYS_MAXARGS, 0, do_ads5121_fuse, |
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" - Read, Sense, Override or Program Fuses\n", |
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"bank <n> - sets active Fuse Bank to 0 or 1\n" |
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" no args shows current active bank\n" |
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"fuse stat - print active fuse bank's protection status\n" |
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"fuse read [<frow> [<n>]] - print <n> fuse rows starting at <frow>\n" |
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" no args to print entire bank's fuses\n" |
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"fuse ovride [<frow> [<v>]]- override fuses at <frow> with <v>\n" |
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" no <v> defaults to 0 for the row\n" |
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" no args resets entire bank to 0\n" |
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" NOTE - settings persist until hard reset\n" |
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"fuse sense [<frow>] - senses current fuse at <frow>\n" |
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" no args for entire bank\n" |
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"fuse prog <frow_bit> - program fuse at row <frow>, bit <_bit>\n" |
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" <frow> is 0-31, <bit> is 0-7; eg. 13_2 \n" |
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" WARNING - this is permanent\n" |
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); |
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#endif /* CONFIG_CMD_FUSE */ |
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