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Date: Fri, 23 Sep 2011 00:34:40 +0900
From: Namjae Jeon <linkinjeon@...il.com>
To: cjb@...top.org, linux-mmc@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Namjae Jeon <linkinjeon@...il.com>
Subject: [PATCH] mmc : general purpose partition support.
It allows general purpose parition in MMC Device. If it is enable, it will make mmcblk0gp1,gp2,gp3,gp4 partition like this.
>cat /proc/paritition
179 0 847872 mmcblk0
179 192 4096 mmcblk0gp4
179 160 4096 mmcblk0gp3
179 128 4096 mmcblk0gp2
179 96 1052672 mmcblk0gp1
179 64 1024 mmcblk0boot1
179 32 1024 mmcblk0boot0
Signed-off-by: Namjae Jeon <linkinjeon@...il.com>
---
drivers/mmc/card/block.c | 36 ++++++++++++++++++++++++++++++++++++
drivers/mmc/core/mmc.c | 42 ++++++++++++++++++++++++++++++++++++++++++
include/linux/mmc/card.h | 4 ++++
include/linux/mmc/mmc.h | 4 ++++
4 files changed, 86 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 9b90726..074ec55 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1402,6 +1402,42 @@ static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
return ret;
}
+ if (card->ext_csd.gp1_size) {
+ ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_GP1,
+ card->ext_csd.gp1_size >> 9,
+ false,
+ "gp1");
+ if (ret)
+ return ret;
+ }
+
+ if (card->ext_csd.gp2_size) {
+ ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_GP2,
+ card->ext_csd.gp2_size >> 9,
+ false,
+ "gp2");
+ if (ret)
+ return ret;
+ }
+
+ if (card->ext_csd.gp3_size) {
+ ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_GP3,
+ card->ext_csd.gp3_size >> 9,
+ false,
+ "gp3");
+ if (ret)
+ return ret;
+ }
+
+ if (card->ext_csd.gp4_size) {
+ ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_GP4,
+ card->ext_csd.gp4_size >> 9,
+ false,
+ "gp4");
+ if (ret)
+ return ret;
+ }
+
return ret;
}
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 10f5a19..cc31511 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -393,6 +393,48 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
card->ext_csd.enhanced_area_offset = -EINVAL;
card->ext_csd.enhanced_area_size = -EINVAL;
}
+
+ /*
+ * General purpose partition Support
+ */
+
+ if (ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x1) {
+
+ u8 hc_erase_grp_sz =
+ ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+ u8 hc_wp_grp_sz =
+ ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+
+ card->ext_csd.enhanced_area_en = 1;
+
+ card->ext_csd.gp1_size =
+ (ext_csd[145] << 16) + (ext_csd[144] << 8) +
+ ext_csd[143];
+ card->ext_csd.gp1_size *=
+ (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
+ card->ext_csd.gp1_size <<= 19;
+
+ card->ext_csd.gp2_size =
+ (ext_csd[148] << 16) + (ext_csd[147] << 8) +
+ ext_csd[146];
+ card->ext_csd.gp2_size *=
+ (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
+ card->ext_csd.gp2_size <<= 19;
+
+ card->ext_csd.gp3_size =
+ (ext_csd[151] << 16) + (ext_csd[150] << 8) +
+ ext_csd[149];
+ card->ext_csd.gp3_size *=
+ (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
+ card->ext_csd.gp3_size <<= 19;
+
+ card->ext_csd.gp4_size =
+ (ext_csd[154] << 16) + (ext_csd[153] << 8) +
+ ext_csd[152];
+ card->ext_csd.gp4_size *=
+ (size_t)(hc_erase_grp_sz * hc_wp_grp_sz);
+ card->ext_csd.gp4_size <<= 19;
+ }
card->ext_csd.sec_trim_mult =
ext_csd[EXT_CSD_SEC_TRIM_MULT];
card->ext_csd.sec_erase_mult =
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index b460fc2..96a98a7 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -64,6 +64,10 @@ struct mmc_ext_csd {
unsigned long long enhanced_area_offset; /* Units: Byte */
unsigned int enhanced_area_size; /* Units: KB */
unsigned int boot_size; /* in bytes */
+ unsigned int gp1_size; /* in bytes */
+ unsigned int gp2_size; /* in bytes */
+ unsigned int gp3_size; /* in bytes */
+ unsigned int gp4_size; /* in bytes */
u8 raw_partition_support; /* 160 */
u8 raw_erased_mem_count; /* 181 */
u8 raw_ext_csd_structure; /* 194 */
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 5a794cb..380720a 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -303,6 +303,10 @@ struct _mmc_csd {
#define EXT_CSD_PART_CONFIG_ACC_MASK (0x7)
#define EXT_CSD_PART_CONFIG_ACC_BOOT0 (0x1)
#define EXT_CSD_PART_CONFIG_ACC_BOOT1 (0x2)
+#define EXT_CSD_PART_CONFIG_ACC_GP1 (0x4)
+#define EXT_CSD_PART_CONFIG_ACC_GP2 (0x5)
+#define EXT_CSD_PART_CONFIG_ACC_GP3 (0x6)
+#define EXT_CSD_PART_CONFIG_ACC_GP4 (0x7)
#define EXT_CSD_CMD_SET_NORMAL (1<<0)
#define EXT_CSD_CMD_SET_SECURE (1<<1)
--
1.7.4.4
--
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