http://www.nabble.com/file/p25455541/nand_error.bmp nand_error.bmp Hi all, I can't do READID with nand_get_flash_type in the nand_base.c What I get is an error "No NAND device found!!!" My board is freescale mpc8544 with samsung K9K8G08U0A, the device is supposed {NAND 1GiB 3,3V 8-bit", 0xD3, 0, 1024, 0, LP_OPTIONS} .
What I did is copy the nand.c from /board/tqc/tqm85xx/nand.c into /board/freescale/mpc8544ds Add #define CONFIG_CMD_NAND into MPC8544DS.h, setup TLB/LAW/BR/OR for nand flash. Add RAM array of upm into /board/.../nand.c. When booting, I can get the chip select signal put low with scope. Trace the code, it get both dev_id and tmp_id 0x000000ff. Per the /driver/mtd/nand/nand_base.c , /driver/mtd/nand/fsl_upm.c , and /board/.../nand.c .... I break down the upm operation into the upm control(mamr, mar, IO_ADDR_R, IO_ADDR_W) And then, I tried the low level register control under CodeWarrior command window, it's still failed. As below: (CCSRBR = 0xe0000000 , nand_flash_base = 0xff000000) change 0xe0005070 0x30000008 (OP=11, pattern_offset=8) change 0xe0005068 0x90000000 change 0xff000000 0x0 change 0xe0005070 0x0 change 0xe0005070 0x30000010 change 0xe0005068 0x00000000 change 0xff000000 0x0 change 0xe0005070 0x0 change 0xe0005070 0x30000008 change 0xe0005068 0x00000000 change 0xff000000 0x0 change 0xe0005070 0x0 display 0xff000000 I don't know why? Any MARCO I should add ? Or any special operation should I add into nand_base.c ? Please help, thank you. -- View this message in context: http://www.nabble.com/No-NAND-device-found%21%21%21-Freescale-MPC8544%2BSAMSUNG-1GB-Nand-Flash-%2C-please-help%21-tp25455541p25455541.html Sent from the Uboot - Users mailing list archive at Nabble.com. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
