diff options
Diffstat (limited to 'drivers/block/blk-uclass.c')
-rw-r--r-- | drivers/block/blk-uclass.c | 65 |
1 files changed, 57 insertions, 8 deletions
diff --git a/drivers/block/blk-uclass.c b/drivers/block/blk-uclass.c index af3c35f..6145675 100644 --- a/drivers/block/blk-uclass.c +++ b/drivers/block/blk-uclass.c @@ -363,7 +363,7 @@ int blk_next_device(struct udevice **devp) } while (1); } -int blk_get_device(int if_type, int devnum, struct udevice **devp) +int blk_find_device(int if_type, int devnum, struct udevice **devp) { struct uclass *uc; struct udevice *dev; @@ -379,13 +379,24 @@ int blk_get_device(int if_type, int devnum, struct udevice **devp) if_type, devnum, dev->name, desc->if_type, desc->devnum); if (desc->if_type == if_type && desc->devnum == devnum) { *devp = dev; - return device_probe(dev); + return 0; } } return -ENODEV; } +int blk_get_device(int if_type, int devnum, struct udevice **devp) +{ + int ret; + + ret = blk_find_device(if_type, devnum, devp); + if (ret) + return ret; + + return device_probe(*devp); +} + unsigned long blk_dread(struct blk_desc *block_dev, lbaint_t start, lbaint_t blkcnt, void *buffer) { @@ -462,6 +473,44 @@ int blk_find_max_devnum(enum if_type if_type) return max_devnum; } +static int blk_next_free_devnum(enum if_type if_type) +{ + int ret; + + ret = blk_find_max_devnum(if_type); + if (ret == -ENODEV) + return 0; + if (ret < 0) + return ret; + + return ret + 1; +} + +static int blk_claim_devnum(enum if_type if_type, int devnum) +{ + struct udevice *dev; + struct uclass *uc; + int ret; + + ret = uclass_get(UCLASS_BLK, &uc); + if (ret) + return ret; + uclass_foreach_dev(dev, uc) { + struct blk_desc *desc = dev_get_uclass_platdata(dev); + + if (desc->if_type == if_type && desc->devnum == devnum) { + int next = blk_next_free_devnum(if_type); + + if (next < 0) + return next; + desc->devnum = next; + return 0; + } + } + + return -ENOENT; +} + int blk_create_device(struct udevice *parent, const char *drv_name, const char *name, int if_type, int devnum, int blksz, lbaint_t size, struct udevice **devp) @@ -471,14 +520,14 @@ int blk_create_device(struct udevice *parent, const char *drv_name, int ret; if (devnum == -1) { - ret = blk_find_max_devnum(if_type); - if (ret == -ENODEV) - devnum = 0; - else if (ret < 0) + devnum = blk_next_free_devnum(if_type); + } else { + ret = blk_claim_devnum(if_type, devnum); + if (ret < 0 && ret != -ENOENT) return ret; - else - devnum = ret + 1; } + if (devnum < 0) + return devnum; ret = device_bind_driver(parent, drv_name, name, &dev); if (ret) return ret; |