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[PATCH] OneNAND: Sync. Burst Read support

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Add OneNAND Sync. Burst Read support
Tested with OMAP platform

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Kyungmin Park
2005-09-03 07:07:19 +01:00
committed by Thomas Gleixner
parent cd5f6346bc
commit 52b0eea73d
5 changed files with 123 additions and 6 deletions
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39
drivers/mtd/onenand/onenand_base.c
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@@ -378,6 +378,35 @@ static int onenand_read_bufferram(struct mtd_info *mtd, int area,
return 0;
}
/**
* onenand_sync_read_bufferram - [OneNAND Interface] Read the bufferram area with Sync. Burst mode
* @param mtd MTD data structure
* @param area BufferRAM area
* @param buffer the databuffer to put/get data
* @param offset offset to read from or write to
* @param count number of bytes to read/write
*
* Read the BufferRAM area with Sync. Burst Mode
*/
static int onenand_sync_read_bufferram(struct mtd_info *mtd, int area,
unsigned char *buffer, int offset, size_t count)
{
struct onenand_chip *this = mtd->priv;
void __iomem *bufferram;
bufferram = this->base + area;
bufferram += onenand_bufferram_offset(mtd, area);
this->mmcontrol(mtd, ONENAND_SYS_CFG1_SYNC_READ);
memcpy(buffer, bufferram + offset, count);
this->mmcontrol(mtd, 0);
return 0;
}
/**
* onenand_write_bufferram - [OneNAND Interface] Write the bufferram area
* @param mtd MTD data structure
@@ -1273,8 +1302,8 @@ static int onenand_check_maf(int manuf)
break;
}
printk(KERN_DEBUG "OneNAND Manufacturer: %s\n",
onenand_manuf_ids[i].name);
printk(KERN_DEBUG "OneNAND Manufacturer: %s (0x%0x)\n",
onenand_manuf_ids[i].name, manuf);
return (i != ONENAND_MFR_UNKNOWN);
}
@@ -1385,6 +1414,12 @@ int onenand_scan(struct mtd_info *mtd, int maxchips)
if (onenand_probe(mtd))
return -ENXIO;
/* Set Sync. Burst Read after probing */
if (this->mmcontrol) {
printk(KERN_INFO "OneNAND Sync. Burst Read support\n");
this->read_bufferram = onenand_sync_read_bufferram;
}
this->state = FL_READY;
init_waitqueue_head(&this->wq);
spin_lock_init(&this->chip_lock);