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disk: rkparam: support get partition info from atags 

- for some platform without storage, pre-loader passes partition info by atags.
- search order: mmc/nand -> atags

Change-Id: Ie2699e217999e4772168c96de3b16c084241891e
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
This commit is contained in:
Joseph Chen 2018-09-05 09:28:51 +08:00 committed by Jianhong Chen
parent 7e1a37f59e
commit c7e2486eb2
1 changed files with 97 additions and 4 deletions
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99
disk/part_rkparm.c
View File

@ -6,6 +6,9 @@
#include <common.h>
#include <malloc.h>
#ifdef CONFIG_ROCKCHIP_PRELOADER_ATAGS
#include <asm/arch/rk_atags.h>
#endif
#ifdef HAVE_BLOCK_DEVICE
#define RK_PARAM_OFFSET 0x2000
@ -27,6 +30,13 @@ struct rkparm_part {
static LIST_HEAD(parts_head);
/*
* What's this?
*
* There maybe two different storage media need to use this partition driver,
* e.g. rkand with SD card. So we need a flag info to recognize it.
*/
static int dev_num = -1;
static int rkparm_param_parse(char *param, struct list_head *parts_head,
@ -40,7 +50,7 @@ static int rkparm_param_parse(char *param, struct list_head *parts_head,
unsigned long size, start;
if (!cmdline) {
debug("RKPARM: Invalid parameter part table\n");
debug("RKPARM: Invalid parameter part table from storage\n");
return -EINVAL;
}
@ -96,7 +106,7 @@ static int rkparm_param_parse(char *param, struct list_head *parts_head,
return 0;
}
static int rkparm_init_param(struct blk_desc *dev_desc,
static int rkparm_init_param_from_storage(struct blk_desc *dev_desc,
struct list_head *parts_head)
{
struct rkparm_param *param;
@ -119,7 +129,91 @@ static int rkparm_init_param(struct blk_desc *dev_desc,
}
return rkparm_param_parse(param->params, parts_head, dev_desc);
}
#if defined(CONFIG_ROCKCHIP_PRELOADER_ATAGS) && defined(CONFIG_DM_RAMDISK)
static int rkparm_init_param_from_atags(struct blk_desc *dev_desc,
struct list_head *parts_head)
{
struct rkparm_part *part;
struct tag *t;
u64 start, size;
int i, len;
if (!atags_is_available()) {
debug("%s: can't find ATAGS\n", __func__);
return -ENODATA;
}
t = atags_get_tag(ATAG_RAM_PARTITION);
if (!t) {
debug("%s: can't find ATAGS ramdisk partition\n", __func__);
return -ENODATA;
}
INIT_LIST_HEAD(parts_head);
for (i = 0; i < t->u.ram_part.count; i++) {
part = malloc(sizeof(*part));
if (!part) {
printf("%s: out of memory\n", __func__);
break;
}
len = strlen(t->u.ram_part.part[i].name) + 1;
memcpy((char *)&part->name,
(char *)&t->u.ram_part.part[i].name, len);
start = t->u.ram_part.part[i].start;
size = t->u.ram_part.part[i].size;
if (!IS_ALIGNED(start, dev_desc->blksz)) {
printf("%s: '%s' addr(0x%llx) is not %ld byte aligned\n",
__func__, part->name, start, dev_desc->blksz);
return -EINVAL;
} else if (!IS_ALIGNED(size, dev_desc->blksz)) {
printf("%s: '%s' size(0x%llx) is not %ld byte aligned\n",
__func__, part->name, size, dev_desc->blksz);
return -EINVAL;
}
/* Convert bytes to blksz */
part->start = start / dev_desc->blksz;
part->size = size / dev_desc->blksz;
list_add_tail(&part->node, parts_head);
debug("%s: name=%s, start=0x%lx, size=0x%lx, blksz=0x%lx\n",
__func__, part->name, part->start,
part->size, dev_desc->blksz);
}
dev_num = ((dev_desc->if_type << 8) + dev_desc->devnum);
return 0;
}
#endif
static int rkparm_init_param(struct blk_desc *dev_desc,
struct list_head *parts_head)
{
int ret;
ret = rkparm_init_param_from_storage(dev_desc, parts_head);
if (ret) {
debug("%s: failed to init param from storage\n", __func__);
#if defined(CONFIG_ROCKCHIP_PRELOADER_ATAGS) && defined(CONFIG_DM_RAMDISK)
ret = rkparm_init_param_from_atags(dev_desc, parts_head);
if (ret) {
debug("%s: failed to init param from ram\n", __func__);
return ret;
}
#endif
}
if (ret)
printf("RKPARM: Invalid parameter part table\n");
return ret;
}
static void part_print_rkparm(struct blk_desc *dev_desc)
@ -145,7 +239,6 @@ static void part_print_rkparm(struct blk_desc *dev_desc)
p->start, p->size, p->name);
}
return;
}