diff options
| author | Kyungmin Park <kyungmin.park@samsung.com> | 2007-12-11 11:23:45 +0900 |
|---|---|---|
| committer | Kyungmin Park <kyungmin.park@samsung.com> | 2008-01-29 17:11:38 +0900 |
| commit | e71f04fc9234b14636887ceb5862755f1690642c (patch) | |
| tree | 9bb52ea8a5115dc6e43b9486c2ac93b7de0c1e4f | |
| parent | b21b72cf33bb212414c1d967850e261b795befa4 (diff) | |
[MTD] [OneNAND] Get correct density from device ID
Use the higher bits for other purpose.
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
| -rw-r--r-- | drivers/mtd/onenand/onenand_base.c | 20 | ||||
| -rw-r--r-- | include/linux/mtd/onenand_regs.h | 1 |
2 files changed, 17 insertions, 4 deletions
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c index c79bc2ef3f5..cf800932999 100644 --- a/drivers/mtd/onenand/onenand_base.c +++ b/drivers/mtd/onenand/onenand_base.c @@ -170,6 +170,18 @@ static int onenand_buffer_address(int dataram1, int sectors, int count) } /** + * onenand_get_density - [DEFAULT] Get OneNAND density + * @param dev_id OneNAND device ID + * + * Get OneNAND density from device ID + */ +static inline int onenand_get_density(int dev_id) +{ + int density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT; + return (density & ONENAND_DEVICE_DENSITY_MASK); +} + +/** * onenand_command - [DEFAULT] Send command to OneNAND device * @param mtd MTD device structure * @param cmd the command to be sent @@ -2146,7 +2158,7 @@ static int onenand_otp_walk(struct mtd_info *mtd, loff_t from, size_t len, *retlen = 0; - density = this->device_id >> ONENAND_DEVICE_DENSITY_SHIFT; + density = onenand_get_density(this->device_id); if (density < ONENAND_DEVICE_DENSITY_512Mb) otp_pages = 20; else @@ -2337,7 +2349,7 @@ static void onenand_check_features(struct mtd_info *mtd) unsigned int density, process; /* Lock scheme depends on density and process */ - density = this->device_id >> ONENAND_DEVICE_DENSITY_SHIFT; + density = onenand_get_density(this->device_id); process = this->version_id >> ONENAND_VERSION_PROCESS_SHIFT; /* Lock scheme */ @@ -2386,7 +2398,7 @@ static void onenand_print_device_info(int device, int version) vcc = device & ONENAND_DEVICE_VCC_MASK; demuxed = device & ONENAND_DEVICE_IS_DEMUX; ddp = device & ONENAND_DEVICE_IS_DDP; - density = device >> ONENAND_DEVICE_DENSITY_SHIFT; + density = onenand_get_density(device); printk(KERN_INFO "%sOneNAND%s %dMB %sV 16-bit (0x%02x)\n", demuxed ? "" : "Muxed ", ddp ? "(DDP)" : "", @@ -2478,7 +2490,7 @@ static int onenand_probe(struct mtd_info *mtd) this->device_id = dev_id; this->version_id = ver_id; - density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT; + density = onenand_get_density(dev_id); this->chipsize = (16 << density) << 20; /* Set density mask. it is used for DDP */ if (ONENAND_IS_DDP(this)) diff --git a/include/linux/mtd/onenand_regs.h b/include/linux/mtd/onenand_regs.h index c46161f4eee..d1b310c92eb 100644 --- a/include/linux/mtd/onenand_regs.h +++ b/include/linux/mtd/onenand_regs.h @@ -67,6 +67,7 @@ /* * Device ID Register F001h (R) */ +#define ONENAND_DEVICE_DENSITY_MASK (0xf) #define ONENAND_DEVICE_DENSITY_SHIFT (4) #define ONENAND_DEVICE_IS_DDP (1 << 3) #define ONENAND_DEVICE_IS_DEMUX (1 << 2) |