Hi Jean-Christophe On Tue, Aug 10, 2010 at 09:09:09AM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote: > sorry I do not really see what the comman do so maybe a small doc or > more comment will be nice OK. I'll add a documentation comment and resubmit. baruch > On 09:25 Tue 10 Aug , Baruch Siach wrote: > > This has only been tested on i.MX25, but should work on other i.MX chips with > > IIM. > > > > Signed-off-by: Baruch Siach <baruch@xxxxxxxxxx> > > --- > > commands/Kconfig | 5 ++ > > commands/Makefile | 1 + > > commands/fuse.c | 161 +++++++++++++++++++++++++++++++++++++++++++++++++++++ > > 3 files changed, 167 insertions(+), 0 deletions(-) > > create mode 100644 commands/fuse.c > > > > diff --git a/commands/Kconfig b/commands/Kconfig > > index 9d11a8b..eb3e48e 100644 > > --- a/commands/Kconfig > > +++ b/commands/Kconfig > > @@ -173,6 +173,11 @@ config CMD_MTEST_ALTERNATIVE > > depends on CMD_MTEST > > prompt "alternative mtest implementation" > > > > +config CMD_FUSE_BLOW > > + tristate > > + depends on ARCH_IMX25 || ARCH_IMX35 > > + prompt "fuse_blow" > > + > > endmenu > > > > menu "flash " > > diff --git a/commands/Makefile b/commands/Makefile > > index 276af85..aa1c12e 100644 > > --- a/commands/Makefile > > +++ b/commands/Makefile > > @@ -8,6 +8,7 @@ obj-$(CONFIG_CMD_ECHO) += echo.o > > obj-$(CONFIG_CMD_MEMORY) += mem.o > > obj-$(CONFIG_CMD_LOADS) += s_record.o > > obj-$(CONFIG_CMD_MTEST) += memtest.o > > +obj-$(CONFIG_CMD_FUSE_BLOW) += fuse.o > > obj-$(CONFIG_CMD_EDIT) += edit.o > > obj-$(CONFIG_CMD_EXEC) += exec.o > > obj-$(CONFIG_CMD_SLEEP) += sleep.o > > diff --git a/commands/fuse.c b/commands/fuse.c > > new file mode 100644 > > index 0000000..1c0ccd6 > > --- /dev/null > > +++ b/commands/fuse.c > > @@ -0,0 +1,161 @@ > > +/* > > + * fuse.c - i.MX IIM fusebox programing and sensing > > + * > > + * Copyright (c) 2010 Baruch Siach <baruch@xxxxxxxxxx>, > > + * Orex Computed Radiography > > + * > > + * This program is free software; you can redistribute it and/or modify > > + * it under the terms of the GNU General Public License version 2 > > + * as published by the Free Software Foundation. > > + * > > + * http://www.opensource.org/licenses/gpl-license.html > > + * http://www.gnu.org/copyleft/gpl.html > > + */ > > + > > +#include <common.h> > > +#include <command.h> > > +#include <asm/io.h> > > +#include <mach/imx-regs.h> > > +#include <mach/iim.h> > > + > > +static int do_fuse_blow(struct command *cmdtp, int argc, char *argv[]) > > +{ > > + unsigned int bank, row, value; > > + int bit, ret = 0; > > + u8 err, stat; > > + > > + if (argc != 4) > > + return COMMAND_ERROR_USAGE; > > + > > + bank = simple_strtoul(argv[1], NULL, 0); > > + row = simple_strtoul(argv[2], NULL, 0); > > + value = simple_strtoul(argv[3], NULL, 0); > > + > > + if (bank > 7) { > > + printf("fuse_blow: invalid bank number\n"); > > + return 1; > > + } > > + > > + if (row > 0x3ff) { > > + printf("fuse_blow: invalid row offset\n"); > > + return 1; > > + } > > + > > + if (value > 0xff) { > > + printf("fuse_blow: invalid value\n"); > > + return 1; > > + } > > + > > + /* clear status and error registers */ > > + writeb(3, IMX_IIM_BASE + IIM_STATM); > > + writeb(0xfe, IMX_IIM_BASE + IIM_ERR); > > + > > + /* unprotect fuse programing */ > > + writeb(0xaa, IMX_IIM_BASE + IIM_PREG_P); > > + > > + /* upper half address register */ > > + writeb((bank << 3) | (row >> 7), IMX_IIM_BASE + IIM_UA); > > + > > + for (bit = 0; bit < 8; bit++) { > > + if (((value >> bit) & 1) == 0) > > + continue; > > + > > + /* lower half address register */ > > + writeb(((row << 1) | bit), IMX_IIM_BASE + IIM_LA); > > + > > + /* start fuse programing */ > > + writeb(0x71, IMX_IIM_BASE + IIM_FCTL); > > + > > + /* wait for program done */ > > + while ((readb(IMX_IIM_BASE + IIM_STAT) & 0x80) != 0) > > + ; > > + > > + /* clear program done status */ > > + stat = readb(IMX_IIM_BASE + IIM_STAT); > > + writeb(stat, IMX_IIM_BASE + IIM_STAT); > > + > > + err = readb(IMX_IIM_BASE + IIM_ERR); > > + if (err) { > > + printf("fuse_blow: bit %d program error (0x%02x)\n", > > + bit, err); > > + ret = 1; > > + goto out; > > + } > > + } > > + > > +out: > > + /* protect fuse programing */ > > + writeb(0, IMX_IIM_BASE + IIM_PREG_P); > > + return ret; > > +} > > + > > +static const __maybe_unused char cmd_fuse_blow_help[] = > > +"Usage: fuse_blow <bank> <row> <value>\n" > > +"Blow fuses in <bank> <row> to match <value>\n"; > > + > > +BAREBOX_CMD_START(fuse_blow) > > + .cmd = do_fuse_blow, > > + .usage = "program fuse row", > > + BAREBOX_CMD_HELP(cmd_fuse_blow_help) > > +BAREBOX_CMD_END > > + > > +static int do_fuse_sense(struct command *cmdtp, int argc, char *argv[]) > > +{ > > + unsigned int bank, row; > > + u8 err, stat; > > + > > + if (argc != 3) > > + return COMMAND_ERROR_USAGE; > > + > > + bank = simple_strtoul(argv[1], NULL, 0); > > + row = simple_strtoul(argv[2], NULL, 0); > > + > > + if (bank > 7) { > > + printf("fuse_sense: invalid bank number\n"); > > + return 1; > > + } > > + > > + if (row > 0x3ff) { > > + printf("fuse_sense: invalid row offset\n"); > > + return 1; > > + } > > + > > + /* clear status and error registers */ > > + writeb(3, IMX_IIM_BASE + IIM_STATM); > > + writeb(0xfe, IMX_IIM_BASE + IIM_ERR); > > + > > + /* upper and lower address halves */ > > + writeb((bank << 3) | (row >> 7), IMX_IIM_BASE + IIM_UA); > > + writeb((row << 1) & 0xf8, IMX_IIM_BASE + IIM_LA); > > + > > + /* start fuse sensing */ > > + writeb(0x08, IMX_IIM_BASE + IIM_FCTL); > > + > > + /* wait for sense done */ > > + while ((readb(IMX_IIM_BASE + IIM_STAT) & 0x80) != 0) > > + ; > > + > > + stat = readb(IMX_IIM_BASE + IIM_STAT); > > + writeb(stat, IMX_IIM_BASE + IIM_STAT); > > + > > + err = readb(IMX_IIM_BASE + IIM_ERR); > > + if (err) { > > + printf("fuse_sense: sense error (0x%02x)\n", err); > > + return 1; > > + } > > + > > + printf("bank %u row 0x%02x: 0x%02x\n", bank, row, > > + readb(IMX_IIM_BASE + IIM_SDAT)); > > + > > + return 0; > > +} > > + > > +static const __maybe_unused char cmd_fuse_sense_help[] = > > +"Usage: fuse_sense <bank> <row>\n" > > +"Sense the fuses row at <bank> <row>\n"; > > + > > +BAREBOX_CMD_START(fuse_sense) > > + .cmd = do_fuse_sense, > > + .usage = "sense fuse row", > > + BAREBOX_CMD_HELP(cmd_fuse_sense_help) > > +BAREBOX_CMD_END > > -- > > 1.7.1 -- ~. .~ Tk Open Systems =}------------------------------------------------ooO--U--Ooo------------{= - baruch@xxxxxxxxxx - tel: +972.2.679.5364, http://www.tkos.co.il - _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
