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-rw-r--r--board/zylonite/nand.c562
1 files changed, 0 insertions, 562 deletions
diff --git a/board/zylonite/nand.c b/board/zylonite/nand.c
deleted file mode 100644
index 71d18a6f5..000000000
--- a/board/zylonite/nand.c
+++ /dev/null
@@ -1,562 +0,0 @@
-/*
- * (C) Copyright 2006 DENX Software Engineering
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-#include <asm/io.h>
-
-#if defined(CONFIG_CMD_NAND)
-
-#include <nand.h>
-#include <asm/arch/pxa-regs.h>
-
-#ifdef CONFIG_SYS_DFC_DEBUG1
-# define DFC_DEBUG1(fmt, args...) printf(fmt, ##args)
-#else
-# define DFC_DEBUG1(fmt, args...)
-#endif
-
-#ifdef CONFIG_SYS_DFC_DEBUG2
-# define DFC_DEBUG2(fmt, args...) printf(fmt, ##args)
-#else
-# define DFC_DEBUG2(fmt, args...)
-#endif
-
-#ifdef CONFIG_SYS_DFC_DEBUG3
-# define DFC_DEBUG3(fmt, args...) printf(fmt, ##args)
-#else
-# define DFC_DEBUG3(fmt, args...)
-#endif
-
-/* These really don't belong here, as they are specific to the NAND Model */
-static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
-
-static struct nand_bbt_descr delta_bbt_descr = {
- .options = 0,
- .offs = 0,
- .len = 2,
- .pattern = scan_ff_pattern
-};
-
-static struct nand_ecclayout delta_oob = {
- .eccbytes = 6,
- .eccpos = {2, 3, 4, 5, 6, 7},
- .oobfree = { {8, 2}, {12, 4} }
-};
-
-/*
- * not required for Monahans DFC
- */
-static void dfc_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
-{
- return;
-}
-
-#if 0
-/* read device ready pin */
-static int dfc_device_ready(struct mtd_info *mtdinfo)
-{
- if(NDSR & NDSR_RDY)
- return 1;
- else
- return 0;
- return 0;
-}
-#endif
-
-/*
- * Write buf to the DFC Controller Data Buffer
- */
-static void dfc_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
-{
- unsigned long bytes_multi = len & 0xfffffffc;
- unsigned long rest = len & 0x3;
- unsigned long *long_buf;
- int i;
-
- DFC_DEBUG2("dfc_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];
- writel(*long_buf, NDDB);
- }
- }
- if(rest) {
- printf("dfc_write_buf: ERROR, writing non 4-byte aligned data.\n");
- }
- return;
-}
-
-
-/* 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;
-
- /* we have to be carefull not to overflow the buffer if len is
- * not a multiple of 4 */
- unsigned long bytes_multi = len & 0xfffffffc;
- unsigned long rest = len & 0x3;
- unsigned long *long_buf;
-
- DFC_DEBUG3("dfc_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) {
- long_buf = (unsigned long*) &buf[i];
- *long_buf = readl(NDDB);
- }
- }
-
- /* ...then the rest */
- if(rest) {
- unsigned long rest_data = NDDB;
- for(j=0;j<rest; j++)
- buf[i+j] = (u_char) ((rest_data>>j) & 0xff);
- }
-
- return;
-}
-
-/*
- * read a word. Not implemented as not used in NAND code.
- */
-static u16 dfc_read_word(struct mtd_info *mtd)
-{
- printf("dfc_read_word: UNIMPLEMENTED.\n");
- return 0;
-}
-
-/* global var, too bad: mk@tbd: move to ->priv pointer */
-static unsigned long read_buf = 0;
-static int bytes_read = -1;
-
-/*
- * 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
- * new command is sent to the chip.
- *
- * WARNING:
- * This function is currently only used to read status and id
- * bytes. For these commands always 8 bytes need to be read from
- * NDDB. So we read and discard these bytes right now. In case this
- * function is used for anything else in the future, we must check
- * what was the last command issued and read the appropriate amount of
- * bytes respectively.
- */
-static u_char dfc_read_byte(struct mtd_info *mtd)
-{
- unsigned char byte;
- unsigned long dummy;
-
- if(bytes_read < 0) {
- read_buf = readl(NDDB);
- dummy = readl(NDDB);
- bytes_read = 0;
- }
- byte = (unsigned char) (read_buf>>(8 * bytes_read++));
- if(bytes_read >= 4)
- bytes_read = -1;
-
- DFC_DEBUG2("dfc_read_byte: byte %u: 0x%x of (0x%x).\n", bytes_read - 1, byte, read_buf);
- return byte;
-}
-
-/* calculate delta between OSCR values start and now */
-static unsigned long get_delta(unsigned long start)
-{
- unsigned long cur = readl(OSCR);
-
- if(cur < start) /* OSCR overflowed */
- return (cur + (start^0xffffffff));
- else
- return (cur - start);
-}
-
-/* delay function, this doesn't belong here */
-static void wait_us(unsigned long us)
-{
- unsigned long start = readl(OSCR);
- us = DIV_ROUND_UP(us * OSCR_CLK_FREQ, 1000);
-
- while (get_delta(start) < us) {
- /* do nothing */
- }
-}
-
-static void dfc_clear_nddb(void)
-{
- writel(readl(NDCR) & ~NDCR_ND_RUN, NDCR);
- wait_us(CONFIG_SYS_NAND_OTHER_TO);
-}
-
-/* wait_event with timeout */
-static unsigned long dfc_wait_event(unsigned long event)
-{
- unsigned long ndsr, timeout, start = readl(OSCR);
-
- if(!event)
- return 0xff000000;
- else if(event & (NDSR_CS0_CMDD | NDSR_CS0_BBD))
- timeout = DIV_ROUND_UP(CONFIG_SYS_NAND_PROG_ERASE_TO
- * OSCR_CLK_FREQ, 1000);
- else
- timeout = DIV_ROUND_UP(CONFIG_SYS_NAND_OTHER_TO
- * OSCR_CLK_FREQ, 1000);
-
- while(1) {
- ndsr = readl(NDSR);
- if(ndsr & event) {
- writel(readl(NDSR) | event, NDSR);
- break;
- }
- if(get_delta(start) > timeout) {
- DFC_DEBUG1("dfc_wait_event: TIMEOUT waiting for event: 0x%lx.\n", event);
- return 0xff000000;
- }
-
- }
- return ndsr;
-}
-
-/* we don't always wan't to do this */
-static void dfc_new_cmd(void)
-{
- int retry = 0;
- unsigned long status;
-
- while(retry++ <= CONFIG_SYS_NAND_SENDCMD_RETRY) {
- /* Clear NDSR */
- writel(0xFFF, NDSR);
-
- /* set NDCR[NDRUN] */
- if (!(readl(NDCR) & NDCR_ND_RUN))
- writel(readl(NDCR) | NDCR_ND_RUN, NDCR);
-
- status = dfc_wait_event(NDSR_WRCMDREQ);
-
- if(status & NDSR_WRCMDREQ)
- return;
-
- DFC_DEBUG2("dfc_new_cmd: FAILED to get WRITECMDREQ, retry: %d.\n", retry);
- dfc_clear_nddb();
- }
- DFC_DEBUG1("dfc_new_cmd: giving up after %d retries.\n", retry);
-}
-
-/* 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)
-{
- unsigned long ndsr=0, event=0;
- int state = this->state;
-
- if(state == FL_WRITING) {
- event = NDSR_CS0_CMDD | NDSR_CS0_BBD;
- } else if(state == FL_ERASING) {
- event = NDSR_CS0_CMDD | NDSR_CS0_BBD;
- }
-
- ndsr = dfc_wait_event(event);
-
- if((ndsr & NDSR_CS0_BBD) || (ndsr & 0xff000000))
- return(0x1); /* Status Read error */
- return 0;
-}
-
-/* cmdfunc send commands to the DFC */
-static void dfc_cmdfunc(struct mtd_info *mtd, unsigned command,
- int column, int page_addr)
-{
- /* register struct nand_chip *this = mtd->priv; */
- unsigned long ndcb0=0, ndcb1=0, ndcb2=0, event=0;
-
- /* clear the ugly byte read buffer */
- bytes_read = -1;
- read_buf = 0;
-
- switch (command) {
- case NAND_CMD_READ0:
- DFC_DEBUG3("dfc_cmdfunc: NAND_CMD_READ0, page_addr: 0x%x, column: 0x%x.\n", page_addr, (column>>1));
- dfc_new_cmd();
- ndcb0 = (NAND_CMD_READ0 | (4<<16));
- column >>= 1; /* adjust for 16 bit bus */
- ndcb1 = (((column>>1) & 0xff) |
- ((page_addr<<8) & 0xff00) |
- ((page_addr<<8) & 0xff0000) |
- ((page_addr<<8) & 0xff000000)); /* make this 0x01000000 ? */
- event = NDSR_RDDREQ;
- goto write_cmd;
- case NAND_CMD_READ1:
- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_READ1 unimplemented!\n");
- goto end;
- case NAND_CMD_READOOB:
- DFC_DEBUG1("dfc_cmdfunc: NAND_CMD_READOOB unimplemented!\n");
- goto end;
- case NAND_CMD_READID:
- dfc_new_cmd();
- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_READID.\n");
- ndcb0 = (NAND_CMD_READID | (3 << 21) | (1 << 16)); /* addr cycles*/
- event = NDSR_RDDREQ;
- goto write_cmd;
- case NAND_CMD_PAGEPROG:
- /* sent as a multicommand in NAND_CMD_SEQIN */
- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_PAGEPROG empty due to multicmd.\n");
- goto end;
- case NAND_CMD_ERASE1:
- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_ERASE1, page_addr: 0x%x, column: 0x%x.\n", page_addr, (column>>1));
- dfc_new_cmd();
- ndcb0 = (0xd060 | (1<<25) | (2<<21) | (1<<19) | (3<<16));
- ndcb1 = (page_addr & 0x00ffffff);
- goto write_cmd;
- case NAND_CMD_ERASE2:
- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_ERASE2 empty due to multicmd.\n");
- goto end;
- case NAND_CMD_SEQIN:
- /* send PAGE_PROG command(0x1080) */
- dfc_new_cmd();
- DFC_DEBUG2("dfc_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) |
- ((page_addr<<8) & 0xff00) |
- ((page_addr<<8) & 0xff0000) |
- ((page_addr<<8) & 0xff000000)); /* make this 0x01000000 ? */
- event = NDSR_WRDREQ;
- goto write_cmd;
- case NAND_CMD_STATUS:
- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_STATUS.\n");
- dfc_new_cmd();
- ndcb0 = NAND_CMD_STATUS | (4<<21);
- event = NDSR_RDDREQ;
- goto write_cmd;
- case NAND_CMD_RESET:
- DFC_DEBUG2("dfc_cmdfunc: NAND_CMD_RESET.\n");
- ndcb0 = NAND_CMD_RESET | (5<<21);
- event = NDSR_CS0_CMDD;
- goto write_cmd;
- default:
- printk("dfc_cmdfunc: error, unsupported command.\n");
- goto end;
- }
-
- write_cmd:
- writel(ndcb0, NDCB0);
- writel(ndcb1, NDCB0);
- writel(ndcb2, NDCB0);
-
- /* wait_event: */
- dfc_wait_event(event);
- end:
- return;
-}
-
-static void dfc_gpio_init(void)
-{
- DFC_DEBUG2("Setting up DFC GPIO's.\n");
-
- /* no idea what is done here, see zylonite.c */
- writel(0x1, GPIO4);
-
- writel(0x00000001, DF_ALE_nWE1);
- writel(0x00000001, DF_ALE_nWE2);
- writel(0x00000001, DF_nCS0);
- writel(0x00000001, DF_nCS1);
- writel(0x00000001, DF_nWE);
- writel(0x00000001, DF_nRE);
- writel(0x00000001, DF_IO0);
- writel(0x00000001, DF_IO8);
- writel(0x00000001, DF_IO1);
- writel(0x00000001, DF_IO9);
- writel(0x00000001, DF_IO2);
- writel(0x00000001, DF_IO10);
- writel(0x00000001, DF_IO3);
- writel(0x00000001, DF_IO11);
- writel(0x00000001, DF_IO4);
- writel(0x00000001, DF_IO12);
- writel(0x00000001, DF_IO5);
- writel(0x00000001, DF_IO13);
- writel(0x00000001, DF_IO6);
- writel(0x00000001, DF_IO14);
- writel(0x00000001, DF_IO7);
- writel(0x00000001, DF_IO15);
-
- writel(0x1901, DF_nWE);
- writel(0x1901, DF_nRE);
- writel(0x1900, DF_CLE_nOE);
- writel(0x1901, DF_ALE_nWE1);
- writel(0x1900, DF_INT_RnB);
-}
-
-/*
- * Board-specific NAND initialization. The following members of the
- * argument are board-specific (per include/linux/mtd/nand_new.h):
- * - IO_ADDR_R?: address to read the 8 I/O lines of the flash device
- * - IO_ADDR_W?: address to write the 8 I/O lines of the flash device
- * - cmd_ctrl: hardwarespecific function for accesing control-lines
- * - 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
- * - 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
- * nand_scan about special functionality. See the defines for further
- * explanation
- * Members with a "?" were not set in the merged testing-NAND branch,
- * so they are not set here either.
- */
-int board_nand_init(struct nand_chip *nand)
-{
- unsigned long tCH, tCS, tWH, tWP, tRH, tRP, tRP_high, tR, tWHR, tAR;
-
- /* set up GPIO Control Registers */
- dfc_gpio_init();
-
- /* turn on the NAND Controller Clock (104 MHz @ D0) */
- writel(readl(CKENA) | (CKENA_4_NAND | CKENA_9_SMC), CKENA);
-
-#undef CONFIG_SYS_TIMING_TIGHT
-#ifndef CONFIG_SYS_TIMING_TIGHT
- tCH = MIN(((unsigned long) (NAND_TIMING_tCH * DFC_CLK_PER_US) + 1),
- DFC_MAX_tCH);
- tCS = MIN(((unsigned long) (NAND_TIMING_tCS * DFC_CLK_PER_US) + 1),
- DFC_MAX_tCS);
- tWH = MIN(((unsigned long) (NAND_TIMING_tWH * DFC_CLK_PER_US) + 1),
- DFC_MAX_tWH);
- tWP = MIN(((unsigned long) (NAND_TIMING_tWP * DFC_CLK_PER_US) + 1),
- DFC_MAX_tWP);
- tRH = MIN(((unsigned long) (NAND_TIMING_tRH * DFC_CLK_PER_US) + 1),
- DFC_MAX_tRH);
- tRP = MIN(((unsigned long) (NAND_TIMING_tRP * DFC_CLK_PER_US) + 1),
- DFC_MAX_tRP);
- tR = MIN(((unsigned long) (NAND_TIMING_tR * DFC_CLK_PER_US) + 1),
- DFC_MAX_tR);
- tWHR = MIN(((unsigned long) (NAND_TIMING_tWHR * DFC_CLK_PER_US) + 1),
- DFC_MAX_tWHR);
- tAR = MIN(((unsigned long) (NAND_TIMING_tAR * DFC_CLK_PER_US) + 1),
- DFC_MAX_tAR);
-#else /* this is the tight timing */
-
- tCH = MIN(((unsigned long) (NAND_TIMING_tCH * DFC_CLK_PER_US)),
- DFC_MAX_tCH);
- tCS = MIN(((unsigned long) (NAND_TIMING_tCS * DFC_CLK_PER_US)),
- DFC_MAX_tCS);
- tWH = MIN(((unsigned long) (NAND_TIMING_tWH * DFC_CLK_PER_US)),
- DFC_MAX_tWH);
- tWP = MIN(((unsigned long) (NAND_TIMING_tWP * DFC_CLK_PER_US)),
- DFC_MAX_tWP);
- tRH = MIN(((unsigned long) (NAND_TIMING_tRH * DFC_CLK_PER_US)),
- DFC_MAX_tRH);
- tRP = MIN(((unsigned long) (NAND_TIMING_tRP * DFC_CLK_PER_US)),
- DFC_MAX_tRP);
- tR = MIN(((unsigned long) (NAND_TIMING_tR * DFC_CLK_PER_US) - tCH - 2),
- DFC_MAX_tR);
- tWHR = MIN(((unsigned long) (NAND_TIMING_tWHR * DFC_CLK_PER_US) - tCH - 2),
- DFC_MAX_tWHR);
- tAR = MIN(((unsigned long) (NAND_TIMING_tAR * DFC_CLK_PER_US) - 2),
- DFC_MAX_tAR);
-#endif /* CONFIG_SYS_TIMING_TIGHT */
-
-
- DFC_DEBUG2("tCH=%u, tCS=%u, tWH=%u, tWP=%u, tRH=%u, tRP=%u, tR=%u, tWHR=%u, tAR=%u.\n", tCH, tCS, tWH, tWP, tRH, tRP, tR, tWHR, tAR);
-
- /* tRP value is split in the register */
- if(tRP & (1 << 4)) {
- tRP_high = 1;
- tRP &= ~(1 << 4);
- } else {
- tRP_high = 0;
- }
-
- writel((tCH << 19) |
- (tCS << 16) |
- (tWH << 11) |
- (tWP << 8) |
- (tRP_high << 6) |
- (tRH << 3) |
- (tRP << 0),
- NDTR0CS0);
-
- writel((tR << 16) |
- (tWHR << 4) |
- (tAR << 0),
- NDTR1CS0);
-
- /* If it doesn't work (unlikely) think about:
- * - ecc enable
- * - chip select don't care
- * - read id byte count
- *
- * Intentionally enabled by not setting bits:
- * - dma (DMA_EN)
- * - page size = 512
- * - cs don't care, see if we can enable later!
- * - row address start position (after second cycle)
- * - pages per block = 32
- * - ND_RDY : clears command buffer
- */
- /* NDCR_NCSX | /\* Chip select busy don't care *\/ */
-
- writel(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 */
- (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 */
- NDCR_CS1_PAGEDM |
- NDCR_CS0_CMDDM | /* ND_CSx command done ir masked */
- NDCR_CS1_CMDDM |
- NDCR_CS0_BBDM | /* ND_CSx bad block detect ir masked */
- NDCR_CS1_BBDM |
- NDCR_DBERRM | /* double bit error ir masked */
- NDCR_SBERRM | /* single bit error ir masked */
- NDCR_WRDREQM | /* write data request ir masked */
- NDCR_RDDREQM | /* read data request ir masked */
- NDCR_WRCMDREQM, /* write command request ir masked */
- NDCR);
-
-
- /* wait 10 us due to cmd buffer clear reset */
- /* wait(10); */
-
- nand->cmd_ctrl = dfc_hwcontrol;
-/* nand->dev_ready = dfc_device_ready; */
- nand->ecc.mode = NAND_ECC_SOFT;
- nand->ecc.layout = &delta_oob;
- nand->options = NAND_BUSWIDTH_16;
- nand->waitfunc = dfc_wait;
- nand->read_byte = dfc_read_byte;
- nand->read_word = dfc_read_word;
- nand->read_buf = dfc_read_buf;
- nand->write_buf = dfc_write_buf;
-
- nand->cmdfunc = dfc_cmdfunc;
- nand->badblock_pattern = &delta_bbt_descr;
- return 0;
-}
-
-#endif
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