diff options
Diffstat (limited to 'board/delta/nand.c')
| -rw-r--r-- | board/delta/nand.c | 42 |
1 files changed, 34 insertions, 8 deletions
diff --git a/board/delta/nand.c b/board/delta/nand.c index 9f882a5..88e1902 100644 --- a/board/delta/nand.c +++ b/board/delta/nand.c @@ -31,8 +31,13 @@ /* mk@tbd move this to pxa-regs */ #define OSCR_CLK_FREQ 3.250 /* MHz */ +/* usefull */ #define CFG_DFC_DEBUG1 -#define CFG_DFC_DEBUG2 +/* noisy */ +#undef CFG_DFC_DEBUG2 +/* wild west */ +#undef CFG_DFC_DEBUG3 + #ifdef CFG_DFC_DEBUG1 # define DFC_DEBUG1(fmt, args...) printf(fmt, ##args) @@ -46,6 +51,12 @@ # define DFC_DEBUG2(fmt, args...) #endif +#ifdef CFG_DFC_DEBUG3 +# define DFC_DEBUG3(fmt, args...) printf(fmt, ##args) +#else +# define DFC_DEBUG3(fmt, args...) +#endif + static uint8_t scan_ff_pattern[] = { 0xff, 0xff }; static struct nand_bbt_descr delta_bbt_descr = { @@ -56,7 +67,7 @@ static struct nand_bbt_descr delta_bbt_descr = { }; static struct nand_oobinfo delta_oob = { - .useecc = MTD_NANDECC_AUTOPLACE, + .useecc = MTD_NANDECC_AUTOPL_USR, /* MTD_NANDECC_PLACEONLY, */ .eccbytes = 6, .eccpos = {2, 3, 4, 5, 6, 7}, .oobfree = { {8, 2}, {12, 4} } @@ -90,7 +101,8 @@ static void delta_write_buf(struct mtd_info *mtd, const u_char *buf, int len) unsigned long rest = len & 0x3; unsigned long *long_buf; int i; - + + DFC_DEBUG2("delta_write_buf: writing %d bytes starting with 0x%x.\n", len, *((unsigned long*) buf)); if(bytes_multi) { for(i=0; i<bytes_multi; i+=4) { long_buf = (unsigned long*) &buf[i]; @@ -138,6 +150,7 @@ static void delta_read_buf(struct mtd_info *mtd, u_char* const buf, int len) unsigned long rest = len & 0x3; unsigned long *long_buf; + DFC_DEBUG3("delta_read_buf: reading %d bytes.\n", len); /* if there are any, first copy multiple of 4 bytes */ if(bytes_multi) { for(i=0; i<bytes_multi; i+=4) { @@ -167,6 +180,7 @@ static u16 delta_read_word(struct mtd_info *mtd) /* global var, too bad: mk@tbd: move to ->priv pointer */ static unsigned long read_buf = 0; static int bytes_read = -1; +static unsigned long last_cmd = 0; /* read a byte from NDDB Because we can only read 4 bytes from NDDB at * a time, we buffer the remaining bytes. The buffer is reset when a @@ -176,16 +190,18 @@ static u_char delta_read_byte(struct mtd_info *mtd) { /* struct nand_chip *this = mtd->priv; */ unsigned char byte; + unsigned long dummy; if(bytes_read < 0) { read_buf = NDDB; + dummy = NDDB; bytes_read = 0; } byte = (unsigned char) (read_buf>>(8 * bytes_read++)); if(bytes_read >= 4) bytes_read = -1; - DFC_DEBUG2("delta_read_byte: byte %u: 0x%x of (0x%x).\n", bytes_read, byte, read_buf); + DFC_DEBUG2("delta_read_byte: byte %u: 0x%x of (0x%x).\n", bytes_read - 1, byte, read_buf); return byte; } @@ -330,13 +346,15 @@ static void delta_cmdfunc(struct mtd_info *mtd, unsigned command, /* clear the ugly byte read buffer */ bytes_read = -1; read_buf = 0; - + last_cmd = 0; + /* if command is a double byte cmd, we set bit double cmd bit 19 */ /* command2 = (command>>8) & 0xFF; */ /* ndcb0 = command | ((command2 ? 1 : 0) << 19); *\/ */ switch (command) { case NAND_CMD_READ0: + DFC_DEBUG3("delta_cmdfunc: NAND_CMD_READ0, page_addr: 0x%x, column: 0x%x.\n", page_addr, (column>>1)); delta_new_cmd(); ndcb0 = (NAND_CMD_READ0 | (4<<16)); column >>= 1; /* adjust for 16 bit bus */ @@ -346,7 +364,14 @@ static void delta_cmdfunc(struct mtd_info *mtd, unsigned command, ((page_addr<<8) & 0xff000000)); /* make this 0x01000000 ? */ event = NDSR_RDDREQ; goto write_cmd; + case NAND_CMD_READ1: + DFC_DEBUG2("delta_cmdfunc: NAND_CMD_READ1 unimplemented!\n"); + goto end; + case NAND_CMD_READOOB: + DFC_DEBUG1("delta_cmdfunc: NAND_CMD_READOOB unimplemented!\n"); + goto end; case NAND_CMD_READID: + last_cmd = NAND_CMD_READID; delta_new_cmd(); DFC_DEBUG2("delta_cmdfunc: NAND_CMD_READID.\n"); ndcb0 = (NAND_CMD_READID | (3 << 21) | (1 << 16)); /* addr cycles*/ @@ -357,7 +382,7 @@ static void delta_cmdfunc(struct mtd_info *mtd, unsigned command, DFC_DEBUG2("delta_cmdfunc: NAND_CMD_PAGEPROG empty due to multicmd.\n"); goto end; case NAND_CMD_ERASE1: - DFC_DEBUG2("delta_cmdfunc: NAND_CMD_ERASE1.\n"); + DFC_DEBUG2("delta_cmdfunc: NAND_CMD_ERASE1, page_addr: 0x%x, column: 0x%x.\n", page_addr, (column>>1)); delta_new_cmd(); ndcb0 = (0xd060 | (1<<25) | (2<<21) | (1<<19) | (3<<16)); ndcb1 = (page_addr & 0x00ffffff); @@ -368,7 +393,7 @@ static void delta_cmdfunc(struct mtd_info *mtd, unsigned command, case NAND_CMD_SEQIN: /* send PAGE_PROG command(0x1080) */ delta_new_cmd(); - DFC_DEBUG2("delta_cmdfunc: NAND_CMD_SEQIN/PAGE_PROG.\n"); + DFC_DEBUG2("delta_cmdfunc: NAND_CMD_SEQIN/PAGE_PROG, page_addr: 0x%x, column: 0x%x.\n", page_addr, (column>>1)); ndcb0 = (0x1080 | (1<<25) | (1<<21) | (1<<19) | (4<<16)); column >>= 1; /* adjust for 16 bit bus */ ndcb1 = (((column>>1) & 0xff) | @@ -562,6 +587,7 @@ void board_nand_init(struct nand_chip *nand) #define MIN(x, y) ((x < y) ? x : y) +#undef CFG_TIMING_TIGHT #ifndef CFG_TIMING_TIGHT tCH = MIN(((unsigned long) (NAND_TIMING_tCH * DFC_CLK_PER_US) + 1), DFC_MAX_tCH); @@ -646,7 +672,7 @@ void board_nand_init(struct nand_chip *nand) NDCR = (NDCR_SPARE_EN | /* use the spare area */ NDCR_DWIDTH_C | /* 16bit DFC data bus width */ NDCR_DWIDTH_M | /* 16 bit Flash device data bus width */ - (7 << 16) | /* read id count = 7 ???? mk@tbd */ + (2 << 16) | /* read id count = 7 ???? mk@tbd */ NDCR_ND_ARB_EN | /* enable bus arbiter */ NDCR_RDYM | /* flash device ready ir masked */ NDCR_CS0_PAGEDM | /* ND_nCSx page done ir masked */ |