* TX49 NAND supported?
@ 2003-09-11 19:01 Junio C Hamano
2003-09-12 11:02 ` David Woodhouse
0 siblings, 1 reply; 6+ messages in thread
From: Junio C Hamano @ 2003-09-11 19:01 UTC (permalink / raw)
To: linux-mtd
Does anybody have a working tx4925 NAND driver that can be used
with the latest mtd from infradead CVS? I have located a copy
of tx4925ndfmc.c with 2002 timestamp by Toshiba Corporation
(GPLv2) but it appears to use an API incompatible with the
current one. Among other things, it seems to think that struct
nand_chip has fields like IO_ADDR, CTRL_ADDR, CLE, ALE, NCE,
ioread, iowrite, etc, and appears to predate the following
change in include/linux/mtd/nand.h:
* 10-29-2001 TG changed nand_chip structure to support
* hardwarespecific function for accessing
* control lines
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: TX49 NAND supported?
2003-09-11 19:01 Junio C Hamano
@ 2003-09-12 11:02 ` David Woodhouse
2003-09-15 10:10 ` Alice Hennessy
0 siblings, 1 reply; 6+ messages in thread
From: David Woodhouse @ 2003-09-12 11:02 UTC (permalink / raw)
To: Junio C Hamano; +Cc: linux-mtd
On Thu, 2003-09-11 at 12:01 -0700, Junio C Hamano wrote:
> Does anybody have a working tx4925 NAND driver that can be used
> with the latest mtd from infradead CVS? I have located a copy
> of tx4925ndfmc.c with 2002 timestamp by Toshiba Corporation
> (GPLv2) but it appears to use an API incompatible with the
> current one.
At the time I changed the API, I also updated every driver which had
been submitted to me and put in my CVS tree.
If there are drivers out there from people who couldn't be bothered to
do that, they broke.
Please complain to the author of the module in question and ask them why
they didn't let me have a copy.
--
dwmw2
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: TX49 NAND supported?
2003-09-12 11:02 ` David Woodhouse
@ 2003-09-15 10:10 ` Alice Hennessy
2003-09-19 14:09 ` Alice Hennessy
0 siblings, 1 reply; 6+ messages in thread
From: Alice Hennessy @ 2003-09-15 10:10 UTC (permalink / raw)
To: David Woodhouse; +Cc: linux-mtd
David Woodhouse wrote:
> On Thu, 2003-09-11 at 12:01 -0700, Junio C Hamano wrote:
> > Does anybody have a working tx4925 NAND driver that can be used
> > with the latest mtd from infradead CVS? I have located a copy
> > of tx4925ndfmc.c with 2002 timestamp by Toshiba Corporation
> > (GPLv2) but it appears to use an API incompatible with the
> > current one.
>
> At the time I changed the API, I also updated every driver which had
> been submitted to me and put in my CVS tree.
>
> If there are drivers out there from people who couldn't be bothered to
> do that, they broke.
>
> Please complain to the author of the module in question and ask them why
> they didn't let me have a copy.
>
>
> dwmw2
>
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
I'm in the process of updated tx4925ndfmc.c and tx4938ndfmc.c now. I will
submit them
soon. One problem I'm trying to work around is I have had to set and
clear NAND_CTL_SETWP and
NAND_CTL_CLRWP around the writes. Since this isn't already in nand.c, it
seems to be
unique to these chips. I will investigate more to see if I really need to
do this or if I can
move this code into the mapping files.
Alice
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: TX49 NAND supported?
2003-09-15 10:10 ` Alice Hennessy
@ 2003-09-19 14:09 ` Alice Hennessy
0 siblings, 0 replies; 6+ messages in thread
From: Alice Hennessy @ 2003-09-19 14:09 UTC (permalink / raw)
To: David Woodhouse, linux-mtd
[-- Attachment #1: Type: text/plain, Size: 1836 bytes --]
Alice Hennessy wrote:
> David Woodhouse wrote:
>
> > On Thu, 2003-09-11 at 12:01 -0700, Junio C Hamano wrote:
> > > Does anybody have a working tx4925 NAND driver that can be used
> > > with the latest mtd from infradead CVS? I have located a copy
> > > of tx4925ndfmc.c with 2002 timestamp by Toshiba Corporation
> > > (GPLv2) but it appears to use an API incompatible with the
> > > current one.
> >
> > At the time I changed the API, I also updated every driver which had
> > been submitted to me and put in my CVS tree.
> >
> > If there are drivers out there from people who couldn't be bothered to
> > do that, they broke.
> >
> > Please complain to the author of the module in question and ask them why
> > they didn't let me have a copy.
> >
> >
> > dwmw2
> >
> > ______________________________________________________
> > Linux MTD discussion mailing list
> > http://lists.infradead.org/mailman/listinfo/linux-mtd/
>
> I'm in the process of updated tx4925ndfmc.c and tx4938ndfmc.c now. I will
> submit them
> soon. One problem I'm trying to work around is I have had to set and
> clear NAND_CTL_SETWP and
> NAND_CTL_CLRWP around the writes. Since this isn't already in nand.c, it
> seems to be
> unique to these chips. I will investigate more to see if I really need to
> do this or if I can
> move this code into the mapping files.
>
> Alice
>
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
I've attached a patch that brings in new nand files tx4925ndfmc.c and
tx4938ndfmc.c.
The patch also contains a few changes for nand.c so that this->write_byte and
this->read_byte
are used instead of writeb and readb. I've also added one missing case for
NAND_ECC_6_512 so that this->eccsize gets set to 512 properly.
Alice
[-- Attachment #2: tx49_nand.patch --]
[-- Type: text/plain, Size: 23888 bytes --]
--- drivers/mtd/nand/nand.c Wed Jul 23 14:23:15 2003
+++ /home/ahennessy/pending_patches_current/nand.c Fri Sep 19 13:35:15 2003
@@ -208,7 +208,7 @@
struct nand_chip *this = mtd->priv;
for (i=0; i<len; i++)
- writeb(buf[i], this->IO_ADDR_W);
+ this->write_byte(mtd, buf[i]);
}
static void nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
@@ -217,7 +217,7 @@
struct nand_chip *this = mtd->priv;
for (i=0; i<len; i++)
- buf[i] = readb(this->IO_ADDR_R);
+ buf[i] = this->read_byte(mtd);
}
static int nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
@@ -226,7 +226,7 @@
struct nand_chip *this = mtd->priv;
for (i=0; i<len; i++)
- if (buf[i] != readb(this->IO_ADDR_R))
+ if (buf[i] != this->read_byte(mtd))
return i;
return 0;
@@ -1414,6 +1414,7 @@
switch (this->eccmode) {
case NAND_ECC_HW3_512:
+ case NAND_ECC_HW6_512:
if (mtd->oobblock == 256) {
printk (KERN_WARNING "512 byte HW ECC not possible on 256 Byte pagesize, fallback to SW ECC \n");
this->eccmode = NAND_ECC_SOFT;
--- drivers/mtd/nand/Config.in Fri May 23 11:29:34 2003
+++ drivers/mtd/nand/Config.in.new Fri Sep 19 13:47:40 2003
@@ -31,4 +31,12 @@
fi
fi
+if [ "$CONFIG_TOSHIBA_RBTX4925" = "y" ]; then
+ dep_tristate ' SmartMedia Card on Toshiba RBTX4925 reference board' CONFIG_MTD_NAND_TX4925NDFMC $CONFIG_MTD_NAND
+fi
+
+if [ "$CONFIG_TOSHIBA_RBTX4938" = "y" ]; then
+ dep_tristate ' NAND Flash device on Toshiba RBTX4938 reference board' CONFIG_MTD_NAND_TX4938NDFMC $CONFIG_MTD_NAND $CONFIG_TOSHIBA_RBTX4938_MPLEX_NAND
+fi
+
endmenu
--- drivers/mtd/nand/Makefile.common Fri Sep 19 13:45:35 2003
+++ drivers/mtd/nand/Makefile.common.new Fri Sep 19 13:46:00 2003
@@ -12,6 +12,8 @@
obj-$(CONFIG_MTD_NAND_SPIA) += spia.o
obj-$(CONFIG_MTD_NAND_AUTCPU12) += autcpu12.o
obj-$(CONFIG_MTD_NAND_EDB7312) += edb7312.o
+obj-$(CONFIG_MTD_NAND_TX4925NDFMC) += tx4925ndfmc.o
+obj-$(CONFIG_MTD_NAND_TX4938NDFMC) += tx4938ndfmc.o
obj-$(CONFIG_MTD_NAND_IDS) += nand_ids.o
-include $(TOPDIR)/Rules.make
--- drivers/mtd/nand/tx4925ndfmc.c Thu Jan 1 00:00:00 1970
+++ /home/ahennessy/pending_patches_current/tx4925ndfmc.c Fri Sep 19 13:36:46 2003
@@ -0,0 +1,413 @@
+/*
+ * drivers/mtd/tx4925ndfmc.c
+ *
+ * Overview:
+ * This is a device driver for the NAND flash device found on the
+ * Toshiba RBTX4925 reference board, which is a SmartMediaCard. It supports
+ * 16MB, 32MB and 64MB cards.
+ *
+ * Author: MontaVista Software, Inc. source@mvista.com
+ *
+ * Derived from drivers/mtd/autcpu12.c
+ * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
+ *
+ * Copyright (C) 2001 Toshiba Corporation
+ *
+ * 2003 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+#include <asm/tx4925/tx4925_nand.h>
+
+extern struct nand_oobinfo jffs2_oobinfo;
+
+/*
+ * MTD structure for RBTX4925 board
+ */
+static struct mtd_info *tx4925ndfmc_mtd = NULL;
+
+/*
+ * Module stuff
+ */
+#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
+#define tx4925ndfmc_init init_module
+#define tx4925ndfmc_cleanup cleanup_module
+#endif
+
+/*
+ * Define partitions for flash devices
+ */
+
+static struct mtd_partition partition_info16k[] = {
+ { name: "RBTX4925 flash partition 1",
+ offset: 0,
+ size: 8 * 0x00100000 },
+ { name: "RBTX4925 flash partition 2",
+ offset: 8 * 0x00100000,
+ size: 8 * 0x00100000 },
+};
+
+static struct mtd_partition partition_info32k[] = {
+ { name: "RBTX4925 flash partition 1",
+ offset: 0,
+ size: 8 * 0x00100000 },
+ { name: "RBTX4925 flash partition 2",
+ offset: 8 * 0x00100000,
+ size: 24 * 0x00100000 },
+};
+
+static struct mtd_partition partition_info64k[] = {
+ { name: "User FS",
+ offset: 0,
+ size: 16 * 0x00100000 },
+ { name: "RBTX4925 flash partition 2",
+ offset: 16 * 0x00100000,
+ size: 48 * 0x00100000},
+};
+
+static struct mtd_partition partition_info128k[] = {
+ { name: "Skip bad section",
+ offset: 0,
+ size: 16 * 0x00100000 },
+ { name: "User FS",
+ offset: 16 * 0x00100000,
+ size: 112 * 0x00100000 },
+};
+#define NUM_PARTITIONS16K 2
+#define NUM_PARTITIONS32K 2
+#define NUM_PARTITIONS64K 2
+#define NUM_PARTITIONS128K 2
+
+/*
+ * hardware specific access to control-lines
+*/
+static void tx4925ndfmc_hwcontrol(struct mtd_info *mtd, int cmd)
+{
+
+ switch(cmd){
+
+ case NAND_CTL_SETCLE:
+ tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_CLE;
+ break;
+ case NAND_CTL_CLRCLE:
+ tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_CLE;
+ break;
+ case NAND_CTL_SETALE:
+ tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ALE;
+ break;
+ case NAND_CTL_CLRALE:
+ tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ALE;
+ break;
+ case NAND_CTL_SETNCE:
+ tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_CE;
+ break;
+ case NAND_CTL_CLRNCE:
+ tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_CE;
+ break;
+ case NAND_CTL_SETWP:
+ tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_WE;
+ break;
+ case NAND_CTL_CLRWP:
+ tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_WE;
+ break;
+ }
+}
+
+/*
+* read device ready pin
+*/
+static int tx4925ndfmc_device_ready(struct mtd_info *mtd)
+{
+ int ready;
+ ready = (tx4925_ndfmcptr->sr & TX4925_NDSFR_BUSY) ? 0 : 1;
+ return ready;
+}
+void tx4925ndfmc_enable_hwecc(struct mtd_info *mtd, int mode)
+{
+ /* reset first */
+ tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_MASK;
+ tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
+ tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_ENAB;
+}
+static void tx4925ndfmc_disable_ecc(void)
+{
+ tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
+}
+static void tx4925ndfmc_enable_read_ecc(void)
+{
+ tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
+ tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_READ;
+}
+void tx4925ndfmc_readecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code){
+ int i;
+ u_char *ecc = ecc_code;
+ tx4925ndfmc_enable_read_ecc();
+ for (i = 0;i < 6;i++,ecc++)
+ *ecc = tx4925_read_nfmc(&(tx4925_ndfmcptr->dtr));
+ tx4925ndfmc_disable_ecc();
+}
+void tx4925ndfmc_device_setup(void)
+{
+
+ *(unsigned char *)0xbb005000 &= ~0x08;
+
+ /* reset NDFMC */
+ tx4925_ndfmcptr->rstr |= TX4925_NDFRSTR_RST;
+ while (tx4925_ndfmcptr->rstr & TX4925_NDFRSTR_RST);
+
+ /* setup BusSeparete, Hold Time, Strobe Pulse Width */
+ tx4925_ndfmcptr->mcr = TX4925_BSPRT ? TX4925_NDFMCR_BSPRT : 0;
+ tx4925_ndfmcptr->spr = TX4925_HOLD << 4 | TX4925_SPW;
+}
+static u_char tx4925ndfmc_nand_read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+ return tx4925_read_nfmc(this->IO_ADDR_R);
+}
+
+static void tx4925ndfmc_nand_write_byte(struct mtd_info *mtd, u_char byte)
+{
+ struct nand_chip *this = mtd->priv;
+ tx4925_write_nfmc(byte, this->IO_ADDR_W);
+}
+
+/*
+ * Send command to NAND device
+ */
+static void tx4925ndfmc_nand_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
+{
+ register struct nand_chip *this = mtd->priv;
+
+ /* Begin command latch cycle */
+ this->hwcontrol(mtd, NAND_CTL_SETCLE);
+ /*
+ * Write out the command to the device.
+ */
+ if (command == NAND_CMD_SEQIN) {
+ int readcmd;
+
+ if (column >= mtd->oobblock) {
+ /* OOB area */
+ column -= mtd->oobblock;
+ readcmd = NAND_CMD_READOOB;
+ } else if (column < 256) {
+ /* First 256 bytes --> READ0 */
+ readcmd = NAND_CMD_READ0;
+ } else {
+ column -= 256;
+ readcmd = NAND_CMD_READ1;
+ }
+ this->write_byte(mtd, readcmd);
+ }
+ this->write_byte(mtd, command);
+
+ /* Set ALE and clear CLE to start address cycle */
+ this->hwcontrol(mtd, NAND_CTL_CLRCLE);
+
+ if (column != -1 || page_addr != -1) {
+ this->hwcontrol(mtd, NAND_CTL_SETALE);
+
+ /* Serially input address */
+ if (column != -1)
+ this->write_byte(mtd, column);
+ if (page_addr != -1) {
+ this->write_byte(mtd, (unsigned char) (page_addr & 0xff));
+ this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff));
+ /* One more address cycle for higher density devices */
+ if (mtd->size & 0x0c000000)
+ this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0x0f));
+ }
+ /* Latch in address */
+ this->hwcontrol(mtd, NAND_CTL_CLRALE);
+ }
+
+ /*
+ * program and erase have their own busy handlers
+ * status and sequential in needs no delay
+ */
+ switch (command) {
+
+ case NAND_CMD_PAGEPROG:
+ /* Turn off WE */
+ this->hwcontrol (mtd, NAND_CTL_CLRWP);
+ return;
+
+ case NAND_CMD_SEQIN:
+ /* Turn on WE */
+ this->hwcontrol (mtd, NAND_CTL_SETWP);
+ return;
+
+ case NAND_CMD_ERASE1:
+ case NAND_CMD_ERASE2:
+ case NAND_CMD_STATUS:
+ return;
+
+ case NAND_CMD_RESET:
+ if (this->dev_ready)
+ break;
+ this->hwcontrol(mtd, NAND_CTL_SETCLE);
+ this->write_byte(mtd, NAND_CMD_STATUS);
+ this->hwcontrol(mtd, NAND_CTL_CLRCLE);
+ while ( !(this->read_byte(mtd) & 0x40));
+ return;
+
+ /* This applies to read commands */
+ default:
+ /*
+ * If we don't have access to the busy pin, we apply the given
+ * command delay
+ */
+ if (!this->dev_ready) {
+ udelay (this->chip_delay);
+ return;
+ }
+ }
+
+ /* wait until command is processed */
+ while (!this->dev_ready(mtd));
+}
+
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+extern int parse_cmdline_partitions(struct mtd_info *master, struct mtd_partitio
+n **pparts, char *);
+#endif
+
+/*
+ * Main initialization routine
+ */
+extern int nand_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc);
+int __init tx4925ndfmc_init (void)
+{
+ struct nand_chip *this;
+ int err = 0;
+
+ /* Allocate memory for MTD device structure and private data */
+ tx4925ndfmc_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
+ GFP_KERNEL);
+ if (!tx4925ndfmc_mtd) {
+ printk ("Unable to allocate RBTX4925 NAND MTD device structure.\n");
+ err = -ENOMEM;
+ goto out;
+ }
+
+ tx4925ndfmc_device_setup();
+
+ /* io is indirect via a register so don't need to ioremap address */
+
+ /* Get pointer to private data */
+ this = (struct nand_chip *) (&tx4925ndfmc_mtd[1]);
+
+ /* Initialize structures */
+ memset((char *) tx4925ndfmc_mtd, 0, sizeof(struct mtd_info));
+ memset((char *) this, 0, sizeof(struct nand_chip));
+
+ /* Link the private data with the MTD structure */
+ tx4925ndfmc_mtd->priv = this;
+
+ /* Set address of NAND IO lines */
+ this->IO_ADDR_R = (unsigned long)&(tx4925_ndfmcptr->dtr);
+ this->IO_ADDR_W = (unsigned long)&(tx4925_ndfmcptr->dtr);
+ this->hwcontrol = tx4925ndfmc_hwcontrol;
+#define USE_HW_ECC
+//#undef USE_HW_ECC
+#ifdef USE_HW_ECC
+ this->enable_hwecc = tx4925ndfmc_enable_hwecc;
+ this->calculate_ecc = tx4925ndfmc_readecc;
+ this->correct_data = nand_correct_data;
+ this->eccmode = NAND_ECC_HW6_512;
+#else
+ this->eccmode = NAND_ECC_SOFT;
+#endif
+ this->dev_ready = tx4925ndfmc_device_ready;
+ /* 20 us command delay time */
+ this->chip_delay = 20;
+ this->read_byte = tx4925ndfmc_nand_read_byte;
+ this->write_byte = tx4925ndfmc_nand_write_byte;
+ this->cmdfunc = tx4925ndfmc_nand_command;
+
+ /* Scan to find existance of the device */
+ if (nand_scan (tx4925ndfmc_mtd, 1)) {
+ err = -ENXIO;
+ goto out_ior;
+ }
+
+ /* Allocate memory for internal data buffer */
+ this->data_buf = kmalloc (sizeof(u_char) * (tx4925ndfmc_mtd->oobblock + tx4925ndfmc_mtd->oobsize), GFP_KERNEL);
+ if (!this->data_buf) {
+ printk ("Unable to allocate NAND data buffer for RBTX4925.\n");
+ err = -ENOMEM;
+ goto out_ior;
+ }
+
+ /* Register the partitions */
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+ {
+ int mtd_parts_nb = 0;
+ struct mtd_partition *mtd_parts = 0;
+ mtd_parts_nb = parse_cmdline_partitions(tx4925ndfmc_mtd, &mtd_parts, "tx4925ndfmc");
+ if (mtd_parts_nb > 0)
+ add_mtd_partitions(tx4925ndfmc_mtd, mtd_parts, mtd_parts_nb);
+ else
+ add_mtd_device(tx4925ndfmc_mtd);
+ }
+#else /* ifdef CONFIG_MTD_CMDLINE_PARTS */
+ switch(tx4925ndfmc_mtd->size){
+ case 0x01000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info16k, NUM_PARTITIONS16K); break;
+ case 0x02000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info32k, NUM_PARTITIONS32K); break;
+ case 0x04000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info64k, NUM_PARTITIONS64K); break;
+ case 0x08000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info128k, NUM_PARTITIONS128K); break;
+ default: {
+ printk ("Unsupported SmartMedia device\n");
+ err = -ENXIO;
+ goto out_buf;
+ }
+ }
+#endif /* ifdef CONFIG_MTD_CMDLINE_PARTS */
+ goto out;
+
+out_buf:
+ kfree (this->data_buf);
+out_ior:
+out:
+ return err;
+}
+
+module_init(tx4925ndfmc_init);
+
+/*
+ * Clean up routine
+ */
+#ifdef MODULE
+static void __exit tx4925ndfmc_cleanup (void)
+{
+ struct nand_chip *this = (struct nand_chip *) &tx4925ndfmc_mtd[1];
+
+ /* Unregister partitions */
+ del_mtd_partitions(tx4925ndfmc_mtd);
+
+ /* Unregister the device */
+ del_mtd_device (tx4925ndfmc_mtd);
+
+ /* Free internal data buffers */
+ kfree (this->data_buf);
+
+ /* Free the MTD device structure */
+ kfree (tx4925ndfmc_mtd);
+}
+module_exit(tx4925ndfmc_cleanup);
+#endif
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Glue layer for SmartMediaCard on Toshiba RBTX4925");
--- drivers/mtd/nand/tx4938ndfmc.c Thu Jan 1 00:00:00 1970
+++ /home/ahennessy/pending_patches_current/tx4938ndfmc.c Fri Sep 19 13:36:51 2003
@@ -0,0 +1,357 @@
+/*
+ * drivers/mtd/nand/tx4938ndfmc.c
+ *
+ * Overview:
+ * This is a device driver for the NAND flash device connected to
+ * TX4938 internal NAND Memory Controller.
+ * TX4938 NDFMC is almost same as TX4925 NDFMC, but register size are 64 bit.
+ *
+ * Author: source@mvista.com
+ *
+ * Based on spia.c by Steven J. Hill
+ *
+ * Copyright (C) 2000-2001 Toshiba Corporation
+ *
+ * 2003 (c) MontaVista Software, Inc. This file is licensed under the
+ * terms of the GNU General Public License version 2. This program is
+ * licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+#include <linux/config.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/nand_ecc.h>
+#include <linux/mtd/partitions.h>
+#include <asm/io.h>
+#include <asm/bootinfo.h>
+#include <linux/delay.h>
+#include <asm/tx4938/rbtx4938.h>
+
+extern struct nand_oobinfo jffs2_oobinfo;
+
+/*
+ * MTD structure for TX4938 NDFMC
+ */
+static struct mtd_info *tx4938ndfmc_mtd;
+
+/*
+ * Define partitions for flash device
+ */
+#define flush_wb() (void)tx4938_ndfmcptr->mcr;
+
+#define NUM_PARTITIONS 3
+#ifndef CONFIG_MTD_CMDLINE_PARTS
+static struct mtd_partition partition_info[NUM_PARTITIONS] = {
+ {
+ name: "RBTX4938 CIS Area",
+ offset: 0,
+ size: 24 * 0x00004000,
+ mask_flags : MTD_WRITEABLE /* This partition is not writable */
+ },
+ {
+ name: "RBTX4938 kernel image",
+ offset: MTDPART_OFS_APPEND,
+ size: 8 * 0x00100000, /* 8MB */
+ mask_flags : MTD_WRITEABLE /* This partition is not writable */
+ },
+ {
+ name: "Root FS (JFFS2)",
+ offset: MTDPART_OFS_APPEND,
+ size: MTDPART_SIZ_FULL
+ },
+};
+#endif
+
+static void tx4938ndfmc_hwcontrol(struct mtd_info *mtd, int cmd)
+{
+ switch (cmd) {
+ case NAND_CTL_SETCLE:
+ tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_CLE;
+ break;
+ case NAND_CTL_CLRCLE:
+ tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_CLE;
+ break;
+ case NAND_CTL_SETALE:
+ tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_ALE;
+ break;
+ case NAND_CTL_CLRALE:
+ tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_ALE;
+ break;
+ /* TX4938_NDFMCR_CE bit is 0:high 1:low */
+ case NAND_CTL_SETNCE:
+ tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_CE;
+ break;
+ case NAND_CTL_CLRNCE:
+ tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_CE;
+ break;
+ case NAND_CTL_SETWP:
+ tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_WE;
+ break;
+ case NAND_CTL_CLRWP:
+ tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_WE;
+ break;
+ }
+}
+static int tx4938ndfmc_dev_ready(struct mtd_info *mtd)
+{
+ flush_wb();
+ return !(tx4938_ndfmcptr->sr & TX4938_NDFSR_BUSY);
+}
+static void tx4938ndfmc_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code)
+{
+ u32 mcr = tx4938_ndfmcptr->mcr;
+ mcr &= ~TX4938_NDFMCR_ECC_ALL;
+ tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
+ tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_READ;
+ ecc_code[1] = tx4938_ndfmcptr->dtr;
+ ecc_code[0] = tx4938_ndfmcptr->dtr;
+ ecc_code[2] = tx4938_ndfmcptr->dtr;
+ tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
+}
+static void tx4938ndfmc_enable_hwecc(struct mtd_info *mtd, int mode)
+{
+ u32 mcr = tx4938_ndfmcptr->mcr;
+ mcr &= ~TX4938_NDFMCR_ECC_ALL;
+ tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_RESET;
+ tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
+ tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_ON;
+}
+
+static u_char tx4938ndfmc_nand_read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *this = mtd->priv;
+ return tx4938_read_nfmc(this->IO_ADDR_R);
+}
+
+static void tx4938ndfmc_nand_write_byte(struct mtd_info *mtd, u_char byte)
+{
+ struct nand_chip *this = mtd->priv;
+ tx4938_write_nfmc(byte, this->IO_ADDR_W);
+}
+
+/*
+ * Send command to NAND device
+ */
+static void tx4938ndfmc_nand_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
+{
+ register struct nand_chip *this = mtd->priv;
+
+ /* Begin command latch cycle */
+ this->hwcontrol(mtd, NAND_CTL_SETCLE);
+ /*
+ * Write out the command to the device.
+ */
+ if (command == NAND_CMD_SEQIN) {
+ int readcmd;
+
+ if (column >= mtd->oobblock) {
+ /* OOB area */
+ column -= mtd->oobblock;
+ readcmd = NAND_CMD_READOOB;
+ } else if (column < 256) {
+ /* First 256 bytes --> READ0 */
+ readcmd = NAND_CMD_READ0;
+ } else {
+ column -= 256;
+ readcmd = NAND_CMD_READ1;
+ }
+ this->write_byte(mtd, readcmd);
+ }
+ this->write_byte(mtd, command);
+
+ /* Set ALE and clear CLE to start address cycle */
+ this->hwcontrol(mtd, NAND_CTL_CLRCLE);
+
+ if (column != -1 || page_addr != -1) {
+ this->hwcontrol(mtd, NAND_CTL_SETALE);
+
+ /* Serially input address */
+ if (column != -1)
+ this->write_byte(mtd, column);
+ if (page_addr != -1) {
+ this->write_byte(mtd, (unsigned char) (page_addr & 0xff));
+ this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff));
+ /* One more address cycle for higher density devices */
+ if (mtd->size & 0x0c000000)
+ this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0x0f));
+ }
+ /* Latch in address */
+ this->hwcontrol(mtd, NAND_CTL_CLRALE);
+ }
+
+ /*
+ * program and erase have their own busy handlers
+ * status and sequential in needs no delay
+ */
+ switch (command) {
+
+ case NAND_CMD_PAGEPROG:
+ /* Turn off WE */
+ this->hwcontrol (mtd, NAND_CTL_CLRWP);
+ return;
+
+ case NAND_CMD_SEQIN:
+ /* Turn on WE */
+ this->hwcontrol (mtd, NAND_CTL_SETWP);
+ return;
+
+ case NAND_CMD_ERASE1:
+ case NAND_CMD_ERASE2:
+ case NAND_CMD_STATUS:
+ return;
+
+ case NAND_CMD_RESET:
+ if (this->dev_ready)
+ break;
+ this->hwcontrol(mtd, NAND_CTL_SETCLE);
+ this->write_byte(mtd, NAND_CMD_STATUS);
+ this->hwcontrol(mtd, NAND_CTL_CLRCLE);
+ while ( !(this->read_byte(mtd) & 0x40));
+ return;
+
+ /* This applies to read commands */
+ default:
+ /*
+ * If we don't have access to the busy pin, we apply the given
+ * command delay
+ */
+ if (!this->dev_ready) {
+ udelay (this->chip_delay);
+ return;
+ }
+ }
+
+ /* wait until command is processed */
+ while (!this->dev_ready(mtd));
+}
+
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+extern int parse_cmdline_partitions(struct mtd_info *master, struct mtd_partition **pparts, char *);
+#endif
+/*
+ * Main initialization routine
+ */
+int __init tx4938ndfmc_init (void)
+{
+ struct nand_chip *this;
+ int bsprt = 0, hold = 0xf, spw = 0xf;
+ int protected = 0;
+
+ if ((*rbtx4938_piosel_ptr & 0x0c) != 0x08) {
+ printk("TX4938 NDFMC: disabled by IOC PIOSEL\n");
+ return -ENODEV;
+ }
+ bsprt = 1;
+ hold = 2;
+ spw = 9 - 1; /* 8 GBUSCLK = 80ns (@ GBUSCLK 100MHz) */
+
+ if ((tx4938_ccfgptr->pcfg &
+ (TX4938_PCFG_ATA_SEL|TX4938_PCFG_ISA_SEL|TX4938_PCFG_NDF_SEL))
+ != TX4938_PCFG_NDF_SEL) {
+ printk("TX4938 NDFMC: disabled by PCFG.\n");
+ return -ENODEV;
+ }
+
+ /* reset NDFMC */
+ tx4938_ndfmcptr->rstr |= TX4938_NDFRSTR_RST;
+ while (tx4938_ndfmcptr->rstr & TX4938_NDFRSTR_RST)
+ ;
+ /* setup BusSeparete, Hold Time, Strobe Pulse Width */
+ tx4938_ndfmcptr->mcr = bsprt ? TX4938_NDFMCR_BSPRT : 0;
+ tx4938_ndfmcptr->spr = hold << 4 | spw;
+
+ /* Allocate memory for MTD device structure and private data */
+ tx4938ndfmc_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
+ GFP_KERNEL);
+ if (!tx4938ndfmc_mtd) {
+ printk ("Unable to allocate TX4938 NDFMC MTD device structure.\n");
+ return -ENOMEM;
+ }
+
+ /* Get pointer to private data */
+ this = (struct nand_chip *) (&tx4938ndfmc_mtd[1]);
+
+ /* Initialize structures */
+ memset((char *) tx4938ndfmc_mtd, 0, sizeof(struct mtd_info));
+ memset((char *) this, 0, sizeof(struct nand_chip));
+
+ /* Link the private data with the MTD structure */
+ tx4938ndfmc_mtd->priv = this;
+
+ /* Set address of NAND IO lines */
+ this->IO_ADDR_R = (unsigned long)&tx4938_ndfmcptr->dtr;
+ this->IO_ADDR_W = (unsigned long)&tx4938_ndfmcptr->dtr;
+ this->hwcontrol = tx4938ndfmc_hwcontrol;
+ this->dev_ready = tx4938ndfmc_dev_ready;
+ this->calculate_ecc = tx4938ndfmc_calculate_ecc;
+ this->correct_data = nand_correct_data;
+ this->enable_hwecc = tx4938ndfmc_enable_hwecc;
+ this->eccmode = NAND_ECC_HW3_256;
+ this->chip_delay = 100;
+ this->read_byte = tx4938ndfmc_nand_read_byte;
+ this->write_byte = tx4938ndfmc_nand_write_byte;
+ this->cmdfunc = tx4938ndfmc_nand_command;
+
+ /* Scan to find existance of the device */
+ if (nand_scan (tx4938ndfmc_mtd, 1)) {
+ kfree (tx4938ndfmc_mtd);
+ return -ENXIO;
+ }
+
+ /* Allocate memory for internal data buffer */
+ this->data_buf = kmalloc (sizeof(u_char) * (tx4938ndfmc_mtd->oobblock + tx4938ndfmc_mtd->oobsize), GFP_KERNEL);
+ if (!this->data_buf) {
+ printk ("Unable to allocate NAND data buffer for TX4938.\n");
+ kfree (tx4938ndfmc_mtd);
+ return -ENOMEM;
+ }
+
+ if (protected) {
+ printk(KERN_INFO "TX4938 NDFMC: write protected.\n");
+ tx4938ndfmc_mtd->flags &= ~(MTD_WRITEABLE | MTD_ERASEABLE);
+ }
+
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+ {
+ int mtd_parts_nb = 0;
+ struct mtd_partition *mtd_parts = 0;
+ mtd_parts_nb = parse_cmdline_partitions(tx4938ndfmc_mtd, &mtd_parts, "tx4938ndfmc");
+ if (mtd_parts_nb > 0)
+ add_mtd_partitions(tx4938ndfmc_mtd, mtd_parts, mtd_parts_nb);
+ else
+ add_mtd_device(tx4938ndfmc_mtd);
+ }
+#else
+ add_mtd_partitions(tx4938ndfmc_mtd, partition_info, NUM_PARTITIONS );
+#endif
+
+ return 0;
+}
+module_init(tx4938ndfmc_init);
+
+/*
+ * Clean up routine
+ */
+static void __exit tx4938ndfmc_cleanup (void)
+{
+ struct nand_chip *this = (struct nand_chip *) tx4938ndfmc_mtd->priv;
+
+ /* Unregister the device */
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+ del_mtd_partitions(tx4938ndfmc_mtd);
+#endif
+ del_mtd_device (tx4938ndfmc_mtd);
+
+ /* Free the MTD device structure */
+ kfree (tx4938ndfmc_mtd);
+
+ /* Free internal data buffer */
+ kfree (this->data_buf);
+}
+module_exit(tx4938ndfmc_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Board-specific glue layer for NAND flash on TX4938 NDFMC");
^ permalink raw reply [flat|nested] 6+ messages in thread
* TX49 NAND supported?
@ 2003-10-22 21:44 Alice Hennessy
2003-10-23 8:31 ` David Woodhouse
0 siblings, 1 reply; 6+ messages in thread
From: Alice Hennessy @ 2003-10-22 21:44 UTC (permalink / raw)
To: linux-mtd
[-- Attachment #1: Type: text/plain, Size: 288 bytes --]
Hi,
I have the 2 files ready that support nand on
the TX4938 and TX4925 boards. I sent them previously but they got hung
up on the way to the mailing list
(too big?) Anyway, I've made some improvements. There is also a
small change in nand.c to add
a missing case statement.
Alice
[-- Attachment #2: nand.patch --]
[-- Type: text/plain, Size: 425 bytes --]
--- drivers/mtd/nand/nand.c Wed Jul 23 07:23:15 2003
+++ /home/ahennessy/build/mvl-humboldt-tx4938/linux/drivers/mtd/nand/nand.c Wed Oct 22 14:24:21 2003
@@ -1414,6 +1414,7 @@
switch (this->eccmode) {
case NAND_ECC_HW3_512:
+ case NAND_ECC_HW6_512:
if (mtd->oobblock == 256) {
printk (KERN_WARNING "512 byte HW ECC not possible on 256 Byte pagesize, fallback to SW ECC \n");
this->eccmode = NAND_ECC_SOFT;
[-- Attachment #3: tx4925ndfmc.c --]
[-- Type: text/plain, Size: 11859 bytes --]
/*
* drivers/mtd/tx4925ndfmc.c
*
* Overview:
* This is a device driver for the NAND flash device found on the
* Toshiba RBTX4925 reference board, which is a SmartMediaCard. It supports
* 16MB, 32MB and 64MB cards.
*
* Author: MontaVista Software, Inc. source@mvista.com
*
* Derived from drivers/mtd/autcpu12.c
* Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
*
* Copyright (C) 2001 Toshiba Corporation
*
* 2003 (c) MontaVista Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*
*/
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/tx4925/tx4925_nand.h>
extern struct nand_oobinfo jffs2_oobinfo;
/*
* MTD structure for RBTX4925 board
*/
static struct mtd_info *tx4925ndfmc_mtd = NULL;
/*
* Module stuff
*/
#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
#define tx4925ndfmc_init init_module
#define tx4925ndfmc_cleanup cleanup_module
#endif
/*
* Define partitions for flash devices
*/
static struct mtd_partition partition_info16k[] = {
{ name: "RBTX4925 flash partition 1",
offset: 0,
size: 8 * 0x00100000 },
{ name: "RBTX4925 flash partition 2",
offset: 8 * 0x00100000,
size: 8 * 0x00100000 },
};
static struct mtd_partition partition_info32k[] = {
{ name: "RBTX4925 flash partition 1",
offset: 0,
size: 8 * 0x00100000 },
{ name: "RBTX4925 flash partition 2",
offset: 8 * 0x00100000,
size: 24 * 0x00100000 },
};
static struct mtd_partition partition_info64k[] = {
{ name: "User FS",
offset: 0,
size: 16 * 0x00100000 },
{ name: "RBTX4925 flash partition 2",
offset: 16 * 0x00100000,
size: 48 * 0x00100000},
};
static struct mtd_partition partition_info128k[] = {
{ name: "Skip bad section",
offset: 0,
size: 16 * 0x00100000 },
{ name: "User FS",
offset: 16 * 0x00100000,
size: 112 * 0x00100000 },
};
#define NUM_PARTITIONS16K 2
#define NUM_PARTITIONS32K 2
#define NUM_PARTITIONS64K 2
#define NUM_PARTITIONS128K 2
/*
* hardware specific access to control-lines
*/
static void tx4925ndfmc_hwcontrol(struct mtd_info *mtd, int cmd)
{
switch(cmd){
case NAND_CTL_SETCLE:
tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_CLE;
break;
case NAND_CTL_CLRCLE:
tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_CLE;
break;
case NAND_CTL_SETALE:
tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ALE;
break;
case NAND_CTL_CLRALE:
tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ALE;
break;
case NAND_CTL_SETNCE:
tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_CE;
break;
case NAND_CTL_CLRNCE:
tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_CE;
break;
case NAND_CTL_SETWP:
tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_WE;
break;
case NAND_CTL_CLRWP:
tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_WE;
break;
}
}
/*
* read device ready pin
*/
static int tx4925ndfmc_device_ready(struct mtd_info *mtd)
{
int ready;
ready = (tx4925_ndfmcptr->sr & TX4925_NDSFR_BUSY) ? 0 : 1;
return ready;
}
void tx4925ndfmc_enable_hwecc(struct mtd_info *mtd, int mode)
{
/* reset first */
tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_MASK;
tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_ENAB;
}
static void tx4925ndfmc_disable_ecc(void)
{
tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
}
static void tx4925ndfmc_enable_read_ecc(void)
{
tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_READ;
}
void tx4925ndfmc_readecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code){
int i;
u_char *ecc = ecc_code;
tx4925ndfmc_enable_read_ecc();
for (i = 0;i < 6;i++,ecc++)
*ecc = tx4925_read_nfmc(&(tx4925_ndfmcptr->dtr));
tx4925ndfmc_disable_ecc();
}
void tx4925ndfmc_device_setup(void)
{
*(unsigned char *)0xbb005000 &= ~0x08;
/* reset NDFMC */
tx4925_ndfmcptr->rstr |= TX4925_NDFRSTR_RST;
while (tx4925_ndfmcptr->rstr & TX4925_NDFRSTR_RST);
/* setup BusSeparete, Hold Time, Strobe Pulse Width */
tx4925_ndfmcptr->mcr = TX4925_BSPRT ? TX4925_NDFMCR_BSPRT : 0;
tx4925_ndfmcptr->spr = TX4925_HOLD << 4 | TX4925_SPW;
}
static u_char tx4925ndfmc_nand_read_byte(struct mtd_info *mtd)
{
struct nand_chip *this = mtd->priv;
return tx4925_read_nfmc(this->IO_ADDR_R);
}
static void tx4925ndfmc_nand_write_byte(struct mtd_info *mtd, u_char byte)
{
struct nand_chip *this = mtd->priv;
tx4925_write_nfmc(byte, this->IO_ADDR_W);
}
static void tx4925ndfmc_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
{
int i;
struct nand_chip *this = mtd->priv;
for (i=0; i<len; i++)
tx4925_write_nfmc(buf[i], this->IO_ADDR_W);
}
static void tx4925ndfmc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
{
int i;
struct nand_chip *this = mtd->priv;
for (i=0; i<len; i++)
buf[i] = tx4925_read_nfmc(this->IO_ADDR_R);
}
static int tx4925ndfmc_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
{
int i;
struct nand_chip *this = mtd->priv;
for (i=0; i<len; i++)
if (buf[i] != tx4925_read_nfmc(this->IO_ADDR_R))
return i;
return 0;
}
/*
* Send command to NAND device
*/
static void tx4925ndfmc_nand_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
{
register struct nand_chip *this = mtd->priv;
/* Begin command latch cycle */
this->hwcontrol(mtd, NAND_CTL_SETCLE);
/*
* Write out the command to the device.
*/
if (command == NAND_CMD_SEQIN) {
int readcmd;
if (column >= mtd->oobblock) {
/* OOB area */
column -= mtd->oobblock;
readcmd = NAND_CMD_READOOB;
} else if (column < 256) {
/* First 256 bytes --> READ0 */
readcmd = NAND_CMD_READ0;
} else {
column -= 256;
readcmd = NAND_CMD_READ1;
}
this->write_byte(mtd, readcmd);
}
this->write_byte(mtd, command);
/* Set ALE and clear CLE to start address cycle */
this->hwcontrol(mtd, NAND_CTL_CLRCLE);
if (column != -1 || page_addr != -1) {
this->hwcontrol(mtd, NAND_CTL_SETALE);
/* Serially input address */
if (column != -1)
this->write_byte(mtd, column);
if (page_addr != -1) {
this->write_byte(mtd, (unsigned char) (page_addr & 0xff));
this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff));
/* One more address cycle for higher density devices */
if (mtd->size & 0x0c000000)
this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0x0f));
}
/* Latch in address */
this->hwcontrol(mtd, NAND_CTL_CLRALE);
}
/*
* program and erase have their own busy handlers
* status and sequential in needs no delay
*/
switch (command) {
case NAND_CMD_PAGEPROG:
/* Turn off WE */
this->hwcontrol (mtd, NAND_CTL_CLRWP);
return;
case NAND_CMD_SEQIN:
/* Turn on WE */
this->hwcontrol (mtd, NAND_CTL_SETWP);
return;
case NAND_CMD_ERASE1:
case NAND_CMD_ERASE2:
case NAND_CMD_STATUS:
return;
case NAND_CMD_RESET:
if (this->dev_ready)
break;
this->hwcontrol(mtd, NAND_CTL_SETCLE);
this->write_byte(mtd, NAND_CMD_STATUS);
this->hwcontrol(mtd, NAND_CTL_CLRCLE);
while ( !(this->read_byte(mtd) & 0x40));
return;
/* This applies to read commands */
default:
/*
* If we don't have access to the busy pin, we apply the given
* command delay
*/
if (!this->dev_ready) {
udelay (this->chip_delay);
return;
}
}
/* wait until command is processed */
while (!this->dev_ready(mtd));
}
#ifdef CONFIG_MTD_CMDLINE_PARTS
extern int parse_cmdline_partitions(struct mtd_info *master, struct mtd_partitio
n **pparts, char *);
#endif
/*
* Main initialization routine
*/
extern int nand_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc);
int __init tx4925ndfmc_init (void)
{
struct nand_chip *this;
int err = 0;
/* Allocate memory for MTD device structure and private data */
tx4925ndfmc_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
GFP_KERNEL);
if (!tx4925ndfmc_mtd) {
printk ("Unable to allocate RBTX4925 NAND MTD device structure.\n");
err = -ENOMEM;
goto out;
}
tx4925ndfmc_device_setup();
/* io is indirect via a register so don't need to ioremap address */
/* Get pointer to private data */
this = (struct nand_chip *) (&tx4925ndfmc_mtd[1]);
/* Initialize structures */
memset((char *) tx4925ndfmc_mtd, 0, sizeof(struct mtd_info));
memset((char *) this, 0, sizeof(struct nand_chip));
/* Link the private data with the MTD structure */
tx4925ndfmc_mtd->priv = this;
/* Set address of NAND IO lines */
this->IO_ADDR_R = (unsigned long)&(tx4925_ndfmcptr->dtr);
this->IO_ADDR_W = (unsigned long)&(tx4925_ndfmcptr->dtr);
this->hwcontrol = tx4925ndfmc_hwcontrol;
#define USE_HW_ECC
//#undef USE_HW_ECC
#ifdef USE_HW_ECC
this->enable_hwecc = tx4925ndfmc_enable_hwecc;
this->calculate_ecc = tx4925ndfmc_readecc;
this->correct_data = nand_correct_data;
this->eccmode = NAND_ECC_HW6_512;
#else
this->eccmode = NAND_ECC_SOFT;
#endif
this->dev_ready = tx4925ndfmc_device_ready;
/* 20 us command delay time */
this->chip_delay = 20;
this->read_byte = tx4925ndfmc_nand_read_byte;
this->write_byte = tx4925ndfmc_nand_write_byte;
this->cmdfunc = tx4925ndfmc_nand_command;
this->write_buf = tx4925ndfmc_nand_write_buf;
this->read_buf = tx4925ndfmc_nand_read_buf;
this->verify_buf = tx4925ndfmc_nand_verify_buf;
/* Scan to find existance of the device */
if (nand_scan (tx4925ndfmc_mtd, 1)) {
err = -ENXIO;
goto out_ior;
}
/* Allocate memory for internal data buffer */
this->data_buf = kmalloc (sizeof(u_char) * (tx4925ndfmc_mtd->oobblock + tx4925ndfmc_mtd->oobsize), GFP_KERNEL);
if (!this->data_buf) {
printk ("Unable to allocate NAND data buffer for RBTX4925.\n");
err = -ENOMEM;
goto out_ior;
}
/* Register the partitions */
#ifdef CONFIG_MTD_CMDLINE_PARTS
{
int mtd_parts_nb = 0;
struct mtd_partition *mtd_parts = 0;
mtd_parts_nb = parse_cmdline_partitions(tx4925ndfmc_mtd, &mtd_parts, "tx4925ndfmc");
if (mtd_parts_nb > 0)
add_mtd_partitions(tx4925ndfmc_mtd, mtd_parts, mtd_parts_nb);
else
add_mtd_device(tx4925ndfmc_mtd);
}
#else /* ifdef CONFIG_MTD_CMDLINE_PARTS */
switch(tx4925ndfmc_mtd->size){
case 0x01000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info16k, NUM_PARTITIONS16K); break;
case 0x02000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info32k, NUM_PARTITIONS32K); break;
case 0x04000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info64k, NUM_PARTITIONS64K); break;
case 0x08000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info128k, NUM_PARTITIONS128K); break;
default: {
printk ("Unsupported SmartMedia device\n");
err = -ENXIO;
goto out_buf;
}
}
#endif /* ifdef CONFIG_MTD_CMDLINE_PARTS */
goto out;
out_buf:
kfree (this->data_buf);
out_ior:
out:
return err;
}
module_init(tx4925ndfmc_init);
/*
* Clean up routine
*/
#ifdef MODULE
static void __exit tx4925ndfmc_cleanup (void)
{
struct nand_chip *this = (struct nand_chip *) &tx4925ndfmc_mtd[1];
/* Unregister partitions */
del_mtd_partitions(tx4925ndfmc_mtd);
/* Unregister the device */
del_mtd_device (tx4925ndfmc_mtd);
/* Free internal data buffers */
kfree (this->data_buf);
/* Free the MTD device structure */
kfree (tx4925ndfmc_mtd);
}
module_exit(tx4925ndfmc_cleanup);
#endif
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Glue layer for SmartMediaCard on Toshiba RBTX4925");
[-- Attachment #4: tx4938ndfmc.c --]
[-- Type: text/plain, Size: 10464 bytes --]
/*
* drivers/mtd/nand/tx4938ndfmc.c
*
* Overview:
* This is a device driver for the NAND flash device connected to
* TX4938 internal NAND Memory Controller.
* TX4938 NDFMC is almost same as TX4925 NDFMC, but register size are 64 bit.
*
* Author: source@mvista.com
*
* Based on spia.c by Steven J. Hill
*
* Copyright (C) 2000-2001 Toshiba Corporation
*
* 2003 (c) MontaVista Software, Inc. This file is licensed under the
* terms of the GNU General Public License version 2. This program is
* licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#include <linux/config.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/nand_ecc.h>
#include <linux/mtd/partitions.h>
#include <asm/io.h>
#include <asm/bootinfo.h>
#include <linux/delay.h>
#include <asm/tx4938/rbtx4938.h>
extern struct nand_oobinfo jffs2_oobinfo;
/*
* MTD structure for TX4938 NDFMC
*/
static struct mtd_info *tx4938ndfmc_mtd;
/*
* Define partitions for flash device
*/
#define flush_wb() (void)tx4938_ndfmcptr->mcr;
#define NUM_PARTITIONS 3
#ifndef CONFIG_MTD_CMDLINE_PARTS
static struct mtd_partition partition_info[NUM_PARTITIONS] = {
{
name: "RBTX4938 CIS Area",
offset: 0,
size: 24 * 0x00004000,
mask_flags : MTD_WRITEABLE /* This partition is not writable */
},
{
name: "RBTX4938 kernel image",
offset: MTDPART_OFS_APPEND,
size: 8 * 0x00100000, /* 8MB */
mask_flags : MTD_WRITEABLE /* This partition is not writable */
},
{
name: "Root FS (JFFS2)",
offset: MTDPART_OFS_APPEND,
size: MTDPART_SIZ_FULL
},
};
#endif
static void tx4938ndfmc_hwcontrol(struct mtd_info *mtd, int cmd)
{
switch (cmd) {
case NAND_CTL_SETCLE:
tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_CLE;
break;
case NAND_CTL_CLRCLE:
tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_CLE;
break;
case NAND_CTL_SETALE:
tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_ALE;
break;
case NAND_CTL_CLRALE:
tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_ALE;
break;
/* TX4938_NDFMCR_CE bit is 0:high 1:low */
case NAND_CTL_SETNCE:
tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_CE;
break;
case NAND_CTL_CLRNCE:
tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_CE;
break;
case NAND_CTL_SETWP:
tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_WE;
break;
case NAND_CTL_CLRWP:
tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_WE;
break;
}
}
static int tx4938ndfmc_dev_ready(struct mtd_info *mtd)
{
flush_wb();
return !(tx4938_ndfmcptr->sr & TX4938_NDFSR_BUSY);
}
static void tx4938ndfmc_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code)
{
u32 mcr = tx4938_ndfmcptr->mcr;
mcr &= ~TX4938_NDFMCR_ECC_ALL;
tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_READ;
ecc_code[1] = tx4938_ndfmcptr->dtr;
ecc_code[0] = tx4938_ndfmcptr->dtr;
ecc_code[2] = tx4938_ndfmcptr->dtr;
tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
}
static void tx4938ndfmc_enable_hwecc(struct mtd_info *mtd, int mode)
{
u32 mcr = tx4938_ndfmcptr->mcr;
mcr &= ~TX4938_NDFMCR_ECC_ALL;
tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_RESET;
tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_ON;
}
static u_char tx4938ndfmc_nand_read_byte(struct mtd_info *mtd)
{
struct nand_chip *this = mtd->priv;
return tx4938_read_nfmc(this->IO_ADDR_R);
}
static void tx4938ndfmc_nand_write_byte(struct mtd_info *mtd, u_char byte)
{
struct nand_chip *this = mtd->priv;
tx4938_write_nfmc(byte, this->IO_ADDR_W);
}
static void tx4938ndfmc_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
{
int i;
struct nand_chip *this = mtd->priv;
for (i=0; i<len; i++)
tx4938_write_nfmc(buf[i], this->IO_ADDR_W);
}
static void tx4938ndfmc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
{
int i;
struct nand_chip *this = mtd->priv;
for (i=0; i<len; i++)
buf[i] = tx4938_read_nfmc(this->IO_ADDR_R);
}
static int tx4938ndfmc_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
{
int i;
struct nand_chip *this = mtd->priv;
for (i=0; i<len; i++)
if (buf[i] != tx4938_read_nfmc(this->IO_ADDR_R))
return i;
return 0;
}
/*
* Send command to NAND device
*/
static void tx4938ndfmc_nand_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
{
register struct nand_chip *this = mtd->priv;
/* Begin command latch cycle */
this->hwcontrol(mtd, NAND_CTL_SETCLE);
/*
* Write out the command to the device.
*/
if (command == NAND_CMD_SEQIN) {
int readcmd;
if (column >= mtd->oobblock) {
/* OOB area */
column -= mtd->oobblock;
readcmd = NAND_CMD_READOOB;
} else if (column < 256) {
/* First 256 bytes --> READ0 */
readcmd = NAND_CMD_READ0;
} else {
column -= 256;
readcmd = NAND_CMD_READ1;
}
this->write_byte(mtd, readcmd);
}
this->write_byte(mtd, command);
/* Set ALE and clear CLE to start address cycle */
this->hwcontrol(mtd, NAND_CTL_CLRCLE);
if (column != -1 || page_addr != -1) {
this->hwcontrol(mtd, NAND_CTL_SETALE);
/* Serially input address */
if (column != -1)
this->write_byte(mtd, column);
if (page_addr != -1) {
this->write_byte(mtd, (unsigned char) (page_addr & 0xff));
this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff));
/* One more address cycle for higher density devices */
if (mtd->size & 0x0c000000)
this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0x0f));
}
/* Latch in address */
this->hwcontrol(mtd, NAND_CTL_CLRALE);
}
/*
* program and erase have their own busy handlers
* status and sequential in needs no delay
*/
switch (command) {
case NAND_CMD_PAGEPROG:
/* Turn off WE */
this->hwcontrol (mtd, NAND_CTL_CLRWP);
return;
case NAND_CMD_SEQIN:
/* Turn on WE */
this->hwcontrol (mtd, NAND_CTL_SETWP);
return;
case NAND_CMD_ERASE1:
case NAND_CMD_ERASE2:
case NAND_CMD_STATUS:
return;
case NAND_CMD_RESET:
if (this->dev_ready)
break;
this->hwcontrol(mtd, NAND_CTL_SETCLE);
this->write_byte(mtd, NAND_CMD_STATUS);
this->hwcontrol(mtd, NAND_CTL_CLRCLE);
while ( !(this->read_byte(mtd) & 0x40));
return;
/* This applies to read commands */
default:
/*
* If we don't have access to the busy pin, we apply the given
* command delay
*/
if (!this->dev_ready) {
udelay (this->chip_delay);
return;
}
}
/* wait until command is processed */
while (!this->dev_ready(mtd));
}
#ifdef CONFIG_MTD_CMDLINE_PARTS
extern int parse_cmdline_partitions(struct mtd_info *master, struct mtd_partition **pparts, char *);
#endif
/*
* Main initialization routine
*/
int __init tx4938ndfmc_init (void)
{
struct nand_chip *this;
int bsprt = 0, hold = 0xf, spw = 0xf;
int protected = 0;
if ((*rbtx4938_piosel_ptr & 0x0c) != 0x08) {
printk("TX4938 NDFMC: disabled by IOC PIOSEL\n");
return -ENODEV;
}
bsprt = 1;
hold = 2;
spw = 9 - 1; /* 8 GBUSCLK = 80ns (@ GBUSCLK 100MHz) */
if ((tx4938_ccfgptr->pcfg &
(TX4938_PCFG_ATA_SEL|TX4938_PCFG_ISA_SEL|TX4938_PCFG_NDF_SEL))
!= TX4938_PCFG_NDF_SEL) {
printk("TX4938 NDFMC: disabled by PCFG.\n");
return -ENODEV;
}
/* reset NDFMC */
tx4938_ndfmcptr->rstr |= TX4938_NDFRSTR_RST;
while (tx4938_ndfmcptr->rstr & TX4938_NDFRSTR_RST)
;
/* setup BusSeparete, Hold Time, Strobe Pulse Width */
tx4938_ndfmcptr->mcr = bsprt ? TX4938_NDFMCR_BSPRT : 0;
tx4938_ndfmcptr->spr = hold << 4 | spw;
/* Allocate memory for MTD device structure and private data */
tx4938ndfmc_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
GFP_KERNEL);
if (!tx4938ndfmc_mtd) {
printk ("Unable to allocate TX4938 NDFMC MTD device structure.\n");
return -ENOMEM;
}
/* Get pointer to private data */
this = (struct nand_chip *) (&tx4938ndfmc_mtd[1]);
/* Initialize structures */
memset((char *) tx4938ndfmc_mtd, 0, sizeof(struct mtd_info));
memset((char *) this, 0, sizeof(struct nand_chip));
/* Link the private data with the MTD structure */
tx4938ndfmc_mtd->priv = this;
/* Set address of NAND IO lines */
this->IO_ADDR_R = (unsigned long)&tx4938_ndfmcptr->dtr;
this->IO_ADDR_W = (unsigned long)&tx4938_ndfmcptr->dtr;
this->hwcontrol = tx4938ndfmc_hwcontrol;
this->dev_ready = tx4938ndfmc_dev_ready;
this->calculate_ecc = tx4938ndfmc_calculate_ecc;
this->correct_data = nand_correct_data;
this->enable_hwecc = tx4938ndfmc_enable_hwecc;
this->eccmode = NAND_ECC_HW3_256;
this->chip_delay = 100;
this->read_byte = tx4938ndfmc_nand_read_byte;
this->write_byte = tx4938ndfmc_nand_write_byte;
this->cmdfunc = tx4938ndfmc_nand_command;
this->write_buf = tx4938ndfmc_nand_write_buf;
this->read_buf = tx4938ndfmc_nand_read_buf;
this->verify_buf = tx4938ndfmc_nand_verify_buf;
/* Scan to find existance of the device */
if (nand_scan (tx4938ndfmc_mtd, 1)) {
kfree (tx4938ndfmc_mtd);
return -ENXIO;
}
/* Allocate memory for internal data buffer */
this->data_buf = kmalloc (sizeof(u_char) * (tx4938ndfmc_mtd->oobblock + tx4938ndfmc_mtd->oobsize), GFP_KERNEL);
if (!this->data_buf) {
printk ("Unable to allocate NAND data buffer for TX4938.\n");
kfree (tx4938ndfmc_mtd);
return -ENOMEM;
}
if (protected) {
printk(KERN_INFO "TX4938 NDFMC: write protected.\n");
tx4938ndfmc_mtd->flags &= ~(MTD_WRITEABLE | MTD_ERASEABLE);
}
#ifdef CONFIG_MTD_CMDLINE_PARTS
{
int mtd_parts_nb = 0;
struct mtd_partition *mtd_parts = 0;
mtd_parts_nb = parse_cmdline_partitions(tx4938ndfmc_mtd, &mtd_parts, "tx4938ndfmc");
if (mtd_parts_nb > 0)
add_mtd_partitions(tx4938ndfmc_mtd, mtd_parts, mtd_parts_nb);
else
add_mtd_device(tx4938ndfmc_mtd);
}
#else
add_mtd_partitions(tx4938ndfmc_mtd, partition_info, NUM_PARTITIONS );
#endif
return 0;
}
module_init(tx4938ndfmc_init);
/*
* Clean up routine
*/
static void __exit tx4938ndfmc_cleanup (void)
{
struct nand_chip *this = (struct nand_chip *) tx4938ndfmc_mtd->priv;
/* Unregister the device */
#ifdef CONFIG_MTD_CMDLINE_PARTS
del_mtd_partitions(tx4938ndfmc_mtd);
#endif
del_mtd_device (tx4938ndfmc_mtd);
/* Free the MTD device structure */
kfree (tx4938ndfmc_mtd);
/* Free internal data buffer */
kfree (this->data_buf);
}
module_exit(tx4938ndfmc_cleanup);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Board-specific glue layer for NAND flash on TX4938 NDFMC");
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: TX49 NAND supported?
2003-10-22 21:44 TX49 NAND supported? Alice Hennessy
@ 2003-10-23 8:31 ` David Woodhouse
0 siblings, 0 replies; 6+ messages in thread
From: David Woodhouse @ 2003-10-23 8:31 UTC (permalink / raw)
To: Alice Hennessy; +Cc: linux-mtd
On Wed, 2003-10-22 at 14:44 -0700, Alice Hennessy wrote:
There is also a small change in nand.c to add
> a missing case statement.
Applied; thanks. For the tx49 drivers, please could you correct 'MB' to
'MiB' throughout, switch to C99 struct initialisers, add $Id$ and
MODULE_AUTHOR, and also add the appropriate magic to Makefile.common,
Config.in and Kconfig. Thanks.
You have an account and should be able to commit those directly.
--
dwmw2
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2003-10-23 8:31 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2003-10-22 21:44 TX49 NAND supported? Alice Hennessy
2003-10-23 8:31 ` David Woodhouse
-- strict thread matches above, loose matches on Subject: below --
2003-09-11 19:01 Junio C Hamano
2003-09-12 11:02 ` David Woodhouse
2003-09-15 10:10 ` Alice Hennessy
2003-09-19 14:09 ` Alice Hennessy
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