| Message ID | 500823C9.1040204@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Dear Chris, Could you merge the this at mmc-utils? If you have any other opinion, plz let me know. Best Regards, Jaehoon Chung On 07/20/2012 12:12 AM, Jaehoon Chung wrote: > This patch added the method to enable the bkops. > In ext_csd register, BKOPS_EN bit is one-time programable. > So if you want to use the bkops, use the this command. > > <usage> > #mmc bkops enable /dev/mmcblk0 > > Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> > Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> > Reviewd-by: Venkatraman S <svenkatr@ti.com> > --- > mmc.c | 5 +++++ > mmc.h | 7 +++++++ > mmc_cmds.c | 39 +++++++++++++++++++++++++++++++++++++++ > mmc_cmds.h | 1 + > 4 files changed, 52 insertions(+), 0 deletions(-) > > diff --git a/mmc.c b/mmc.c > index 379d667..d5ef2bb 100644 > --- a/mmc.c > +++ b/mmc.c > @@ -75,6 +75,11 @@ static struct Command commands[] = { > "Enable the boot partition for the <device>.\nTo receive acknowledgment of boot from the card set <send_ack>\nto 1, else set it to 0.", > NULL > }, > + { do_write_bkops_en, -1, > + "bkops enable", "<device>\n" > + "Enable the eMMC BKOPS feature on <device>.", > + NULL > + }, > { 0, 0, 0, 0 } > }; > > diff --git a/mmc.h b/mmc.h > index 0a521a8..3d77b38 100644 > --- a/mmc.h > +++ b/mmc.h > @@ -31,12 +31,14 @@ > */ > #define EXT_CSD_S_CMD_SET 504 > #define EXT_CSD_HPI_FEATURE 503 > +#define EXT_CSD_BKOPS_SUPPORT 502 /* RO */ > #define EXT_CSD_BOOT_INFO 228 /* R/W */ > #define EXT_CSD_PART_SWITCH_TIME 199 > #define EXT_CSD_BOOT_CFG 179 > #define EXT_CSD_PART_CONFIG 179 > #define EXT_CSD_BOOT_WP 173 > #define EXT_CSD_WR_REL_PARAM 166 > +#define EXT_CSD_BKOPS_EN 163 /* R/W */ > #define EXT_CSD_NATIVE_SECTOR_SIZE 63 /* R */ > #define EXT_CSD_USE_NATIVE_SECTOR 62 /* R/W */ > #define EXT_CSD_DATA_SECTOR_SIZE 61 /* R */ > @@ -48,6 +50,11 @@ > #define EN_REL_WR (1<<2) > > /* > + * BKOPS_EN field definition > + */ > +#define BKOPS_ENABLE (1<<0) > + > +/* > * EXT_CSD field definitions > */ > #define EXT_CSD_HPI_SUPP (1<<0) > diff --git a/mmc_cmds.c b/mmc_cmds.c > index 90619db..4c935e0 100644 > --- a/mmc_cmds.c > +++ b/mmc_cmds.c > @@ -280,6 +280,45 @@ int do_write_boot_en(int nargs, char **argv) > return ret; > } > > +int do_write_bkops_en(int nargs, char **argv) > +{ > + __u8 ext_csd[512], value = 0; > + int fd, ret; > + char *device; > + > + CHECK(nargs != 2, "Usage: mmc bkops enable </path/to/mmcblkX>\n", > + exit(1)); > + > + device = argv[1]; > + > + fd = open(device, O_RDWR); > + if (fd < 0) { > + perror("open"); > + exit(1); > + } > + > + ret = read_extcsd(fd, ext_csd); > + if (ret) { > + fprintf(stderr, "Could not read EXT_CSD from %s\n", device); > + exit(1); > + } > + > + if (!(ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1)) { > + fprintf(stderr, "%s dosen't support BKOPS\n", device); > + exit(1); > + } > + > + ret = write_extcsd_value(fd, EXT_CSD_BKOPS_EN, BKOPS_ENABLE); > + if (ret) { > + fprintf(stderr, "Could not write 0x%02x to " > + "EXT_CSD[%d] in %s\n", > + value, EXT_CSD_BKOPS_EN, device); > + exit(1); > + } > + > + return ret; > +} > + > int do_read_extcsd(int nargs, char **argv) > { > __u8 ext_csd[512], ext_csd_rev, reg; > diff --git a/mmc_cmds.h b/mmc_cmds.h > index 2eb1df5..1dd4324 100644 > --- a/mmc_cmds.h > +++ b/mmc_cmds.h > @@ -21,3 +21,4 @@ int do_writeprotect_get(int nargs, char **argv); > int do_writeprotect_set(int nargs, char **argv); > int do_disable_512B_emulation(int nargs, char **argv); > int do_write_boot_en(int nargs, char **argv); > +int do_write_bkops_en(int nargs, char **argv); > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi, On Fri, Aug 31 2012, Jaehoon Chung wrote: > Dear Chris, > > Could you merge the this at mmc-utils? > If you have any other opinion, plz let me know. Looks good, but I was planning to merge it at the same time as merging the kernel patch -- I think we're waiting on another revision of that? Thanks, - Chris.
On 08/31/2012 06:41 PM, Chris Ball wrote: > Hi, > > On Fri, Aug 31 2012, Jaehoon Chung wrote: >> Dear Chris, >> >> Could you merge the this at mmc-utils? >> If you have any other opinion, plz let me know. > > Looks good, but I was planning to merge it at the same time as merging > the kernel patch -- I think we're waiting on another revision of that? Ok, i agree your planning. Thanks for reply. Best Regards, Jaehoon Chung > > Thanks, > > - Chris. > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/mmc.c b/mmc.c index 379d667..d5ef2bb 100644 --- a/mmc.c +++ b/mmc.c @@ -75,6 +75,11 @@ static struct Command commands[] = { "Enable the boot partition for the <device>.\nTo receive acknowledgment of boot from the card set <send_ack>\nto 1, else set it to 0.", NULL }, + { do_write_bkops_en, -1, + "bkops enable", "<device>\n" + "Enable the eMMC BKOPS feature on <device>.", + NULL + }, { 0, 0, 0, 0 } }; diff --git a/mmc.h b/mmc.h index 0a521a8..3d77b38 100644 --- a/mmc.h +++ b/mmc.h @@ -31,12 +31,14 @@ */ #define EXT_CSD_S_CMD_SET 504 #define EXT_CSD_HPI_FEATURE 503 +#define EXT_CSD_BKOPS_SUPPORT 502 /* RO */ #define EXT_CSD_BOOT_INFO 228 /* R/W */ #define EXT_CSD_PART_SWITCH_TIME 199 #define EXT_CSD_BOOT_CFG 179 #define EXT_CSD_PART_CONFIG 179 #define EXT_CSD_BOOT_WP 173 #define EXT_CSD_WR_REL_PARAM 166 +#define EXT_CSD_BKOPS_EN 163 /* R/W */ #define EXT_CSD_NATIVE_SECTOR_SIZE 63 /* R */ #define EXT_CSD_USE_NATIVE_SECTOR 62 /* R/W */ #define EXT_CSD_DATA_SECTOR_SIZE 61 /* R */ @@ -48,6 +50,11 @@ #define EN_REL_WR (1<<2) /* + * BKOPS_EN field definition + */ +#define BKOPS_ENABLE (1<<0) + +/* * EXT_CSD field definitions */ #define EXT_CSD_HPI_SUPP (1<<0) diff --git a/mmc_cmds.c b/mmc_cmds.c index 90619db..4c935e0 100644 --- a/mmc_cmds.c +++ b/mmc_cmds.c @@ -280,6 +280,45 @@ int do_write_boot_en(int nargs, char **argv) return ret; } +int do_write_bkops_en(int nargs, char **argv) +{ + __u8 ext_csd[512], value = 0; + int fd, ret; + char *device; + + CHECK(nargs != 2, "Usage: mmc bkops enable </path/to/mmcblkX>\n", + exit(1)); + + device = argv[1]; + + fd = open(device, O_RDWR); + if (fd < 0) { + perror("open"); + exit(1); + } + + ret = read_extcsd(fd, ext_csd); + if (ret) { + fprintf(stderr, "Could not read EXT_CSD from %s\n", device); + exit(1); + } + + if (!(ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1)) { + fprintf(stderr, "%s dosen't support BKOPS\n", device); + exit(1); + } + + ret = write_extcsd_value(fd, EXT_CSD_BKOPS_EN, BKOPS_ENABLE); + if (ret) { + fprintf(stderr, "Could not write 0x%02x to " + "EXT_CSD[%d] in %s\n", + value, EXT_CSD_BKOPS_EN, device); + exit(1); + } + + return ret; +} + int do_read_extcsd(int nargs, char **argv) { __u8 ext_csd[512], ext_csd_rev, reg; diff --git a/mmc_cmds.h b/mmc_cmds.h index 2eb1df5..1dd4324 100644 --- a/mmc_cmds.h +++ b/mmc_cmds.h @@ -21,3 +21,4 @@ int do_writeprotect_get(int nargs, char **argv); int do_writeprotect_set(int nargs, char **argv); int do_disable_512B_emulation(int nargs, char **argv); int do_write_boot_en(int nargs, char **argv); +int do_write_bkops_en(int nargs, char **argv);