Update MTD to that of Linux 2.6.22.1
A lot changed in the Linux MTD code, since it was last ported from
Linux to U-Boot. This patch takes U-Boot NAND support to the level
of Linux 2.6.22.1 and will enable support for very large NAND devices
(4KB pages) and ease the compatibility between U-Boot and Linux
filesystems.
This patch is tested on two custom boards with PPC and ARM
processors running YAFFS in U-Boot and Linux using gcc-4.1.2
cross compilers.
MAKEALL ppc/arm has some issues:
* DOC/OneNand/nand_spl is not building (I have not tried porting
these parts, and since I do not have any HW and I am not familiar
with this code/HW I think its best left to someone else.)
Except for the issues mentioned above, I have ported all drivers
necessary to run MAKEALL ppc/arm without errors and warnings. Many
drivers were trivial to port, but some were not so trivial. The
following drivers must be examined carefully and maybe rewritten to
some degree:
cpu/ppc4xx/ndfc.c
cpu/arm926ejs/davinci/nand.c
board/delta/nand.c
board/zylonite/nand.c
Signed-off-by: William Juul <william.juul@tandberg.com>
Signed-off-by: Stig Olsen <stig.olsen@tandberg.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
diff --git a/board/delta/nand.c b/board/delta/nand.c
index 5024056..51520f5 100644
--- a/board/delta/nand.c
+++ b/board/delta/nand.c
@@ -69,7 +69,7 @@
/*
* not required for Monahans DFC
*/
-static void dfc_hwcontrol(struct mtd_info *mtdinfo, int cmd)
+static void dfc_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
return;
}
@@ -110,30 +110,6 @@
}
-/*
- * These functions are quite problematic for the DFC. Luckily they are
- * not used in the current nand code, except for nand_command, which
- * we've defined our own anyway. The problem is, that we always need
- * to write 4 bytes to the DFC Data Buffer, but in these functions we
- * don't know if to buffer the bytes/half words until we've gathered 4
- * bytes or if to send them straight away.
- *
- * Solution: Don't use these with Mona's DFC and complain loudly.
- */
-static void dfc_write_word(struct mtd_info *mtd, u16 word)
-{
- printf("dfc_write_word: WARNING, this function does not work with the Monahans DFC!\n");
-}
-static void dfc_write_byte(struct mtd_info *mtd, u_char byte)
-{
- printf("dfc_write_byte: WARNING, this function does not work with the Monahans DFC!\n");
-}
-
-/* The original:
- * static void dfc_read_buf(struct mtd_info *mtd, const u_char *buf, int len)
- *
- * Shouldn't this be "u_char * const buf" ?
- */
static void dfc_read_buf(struct mtd_info *mtd, u_char* const buf, int len)
{
int i=0, j;
@@ -168,7 +144,7 @@
*/
static u16 dfc_read_word(struct mtd_info *mtd)
{
- printf("dfc_write_byte: UNIMPLEMENTED.\n");
+ printf("dfc_read_word: UNIMPLEMENTED.\n");
return 0;
}
@@ -289,9 +265,10 @@
/* this function is called after Programm and Erase Operations to
* check for success or failure */
-static int dfc_wait(struct mtd_info *mtd, struct nand_chip *this, int state)
+static int dfc_wait(struct mtd_info *mtd, struct nand_chip *this)
{
unsigned long ndsr=0, event=0;
+ int state = this->state;
if(state == FL_WRITING) {
event = NDSR_CS0_CMDD | NDSR_CS0_BBD;
@@ -439,7 +416,7 @@
* - dev_ready: hardwarespecific function for accesing device ready/busy line
* - enable_hwecc?: function to enable (reset) hardware ecc generator. Must
* only be provided if a hardware ECC is available
- * - eccmode: mode of ecc, see defines
+ * - ecc.mode: mode of ecc, see defines
* - chip_delay: chip dependent delay for transfering data from array to
* read regs (tR)
* - options: various chip options. They can partly be set to inform
@@ -561,20 +538,18 @@
/* wait(10); */
- nand->hwcontrol = dfc_hwcontrol;
+ nand->cmd_ctrl = dfc_hwcontrol;
/* nand->dev_ready = dfc_device_ready; */
- nand->eccmode = NAND_ECC_SOFT;
+ nand->ecc.mode = NAND_ECC_SOFT;
nand->options = NAND_BUSWIDTH_16;
nand->waitfunc = dfc_wait;
nand->read_byte = dfc_read_byte;
- nand->write_byte = dfc_write_byte;
nand->read_word = dfc_read_word;
- nand->write_word = dfc_write_word;
nand->read_buf = dfc_read_buf;
nand->write_buf = dfc_write_buf;
nand->cmdfunc = dfc_cmdfunc;
- nand->autooob = &delta_oob;
+// nand->autooob = &delta_oob;
nand->badblock_pattern = &delta_bbt_descr;
return 0;
}