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drivers: rk_nand: support global partition table

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The driver will check cmdline mtd partition table first,
if there is no mtd partition table, then the driver will
add nand block device and set gd flag GENHD_FL_EXT_DEVT.

Change-Id: I262c935a2fac89c2a203dac9b8e90133317860f8
Signed-off-by: Zhaoyifeng <zyf@rock-chips.com>
This commit is contained in:
Zhaoyifeng
2017-12-01 11:00:53 +08:00
committed by Tao Huang
parent afc63fcd87
commit 169c390240
1 changed files with 30 additions and 11 deletions
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41
drivers/rk_nand/rk_nand_blk.c
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@@ -468,7 +468,10 @@ static int nand_prase_cmdline_part(struct nand_part *pdisk_part)
unsigned int cap_size = rk_ftl_get_capacity();
char *cmdline;
cmdline = strstr(saved_command_line, "mtdparts=") + 9;
cmdline = strstr(saved_command_line, "mtdparts=");
if (!cmdline)
return 0;
cmdline += 9;
if (!memcmp(cmdline, "rk29xxnand:", strlen("rk29xxnand:"))) {
pbuf = cmdline + strlen("rk29xxnand:");
rknand_get_part(pbuf, pdisk_part, &part_num);
@@ -578,6 +581,7 @@ static int nand_add_dev(struct nand_blk_ops *nandr, struct nand_part *part)
gd->major = nandr->major;
gd->first_minor = (dev->devnum) << nandr->minorbits;
gd->fops = &nand_blktrans_ops;
if (part->name[0])
@@ -599,6 +603,15 @@ static int nand_add_dev(struct nand_blk_ops *nandr, struct nand_part *part)
dev->blkcore_priv = gd;
gd->queue = nandr->rq;
gd->queue->bypass_depth = 1;
if (part->size == rk_ftl_get_capacity()) {
gd->flags = GENHD_FL_EXT_DEVT;
gd->minors = 255;
snprintf(gd->disk_name,
sizeof(gd->disk_name),
"%s%d",
nandr->name,
dev->devnum);
}
if (part->type == PART_NO_ACCESS)
dev->disable_access = 1;
@@ -646,7 +659,8 @@ static int nand_blk_register(struct nand_blk_ops *nandr)
{
struct task_struct *tsk;
int i, ret;
int offset;
u32 offset;
u32 part_size;
rk_nand_schedule_enable_config(1);
nandr->quit = 0;
@@ -681,15 +695,20 @@ static int nand_blk_register(struct nand_blk_ops *nandr)
tsk = kthread_run(nand_blktrans_thread, (void *)nandr, "rknand");
g_max_part_num = nand_prase_cmdline_part(disk_array);
offset = 0;
nandr->last_dev_index = 0;
for (i = 0; i < g_max_part_num; i++) {
pr_info("%10s: 0x%09llx -- 0x%09llx (%llu MB)\n",
disk_array[i].name,
(u64)disk_array[i].offset * 512,
(u64)(disk_array[i].offset + disk_array[i].size) * 512,
(u64)disk_array[i].size / 2048);
nand_add_dev(nandr, &disk_array[i]);
if (g_max_part_num) {
offset = 0;
nandr->last_dev_index = 0;
for (i = 0; i < g_max_part_num; i++) {
part_size = (disk_array[i].offset + disk_array[i].size);
pr_info("%10s: 0x%09llx -- 0x%09llx (%llu MB)\n",
disk_array[i].name,
(u64)disk_array[i].offset * 512,
(u64)part_size * 512,
(u64)disk_array[i].size / 2048);
nand_add_dev(nandr, &disk_array[i]);
}
} else {
nand_blk_add_whole_disk();
}
rknand_create_procfs();