UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

[MTD] DiskOnChip: Wait for the command to finish. 

Do not use the ready function here, as it might hang for ever. 
The result will show, whether the chip is there or not

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2005-02-22 21:48:25 +00:00 committed by Thomas Gleixner
parent fdf2fd5274
commit dfd6129440
1 changed files with 9 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/mtd/nand/diskonchip.c
View File

@ -16,7 +16,7 @@
*
* Interface to generic NAND code for M-Systems DiskOnChip devices
*
* $Id: diskonchip.c,v 1.48 2005/01/31 22:22:21 gleixner Exp $
* $Id: diskonchip.c,v 1.49 2005/02/22 21:48:21 gleixner Exp $
*/
#include <linux/kernel.h>
@ -410,7 +410,12 @@ static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr)
doc200x_hwcontrol(mtd, NAND_CTL_SETALE);
this->write_byte(mtd, 0);
doc200x_hwcontrol(mtd, NAND_CTL_CLRALE);
/* We cant' use dev_ready here, but at least we wait for the
* command to complete
*/
udelay(50);
ret = this->read_byte(mtd) << 8;
ret |= this->read_byte(mtd);
@ -429,6 +434,8 @@ static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr)
doc2000_write_byte(mtd, 0);
doc200x_hwcontrol(mtd, NAND_CTL_CLRALE);
udelay(50);
ident.dword = readl(docptr + DoC_2k_CDSN_IO);
if (((ident.byte[0] << 8) | ident.byte[1]) == ret) {
printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n");