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[MTD] Refactor NAND hwcontrol to cmd_ctrl

Browse source 
The hwcontrol function enforced a step by step state machine
for any kind of hardware chip access. Let the hardware driver
know which control bits are set and inform it about a change
of the control lines. Let the hardware driver write out the
command and address bytes directly. This gives a peformance
advantage for address bus controlled chips and simplifies the
quirks in the hardware drivers.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2006-05-23 23:25:53 +02:00
parent 3821720d51
commit 7abd3ef987
18 changed files with 419 additions and 532 deletions
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56
drivers/mtd/nand/ams-delta.c
View file

@ -34,13 +34,6 @@ static struct mtd_info *ams_delta_mtd = NULL;
#define NAND_MASK (AMS_DELTA_LATCH2_NAND_NRE | AMS_DELTA_LATCH2_NAND_NWE | AMS_DELTA_LATCH2_NAND_CLE | AMS_DELTA_LATCH2_NAND_ALE | AMS_DELTA_LATCH2_NAND_NCE | AMS_DELTA_LATCH2_NAND_NWP)
#define T_NAND_CTL_CLRALE(iob) ams_delta_latch2_write(AMS_DELTA_LATCH2_NAND_ALE, 0)
#define T_NAND_CTL_SETALE(iob) ams_delta_latch2_write(AMS_DELTA_LATCH2_NAND_ALE, AMS_DELTA_LATCH2_NAND_ALE)
#define T_NAND_CTL_CLRCLE(iob) ams_delta_latch2_write(AMS_DELTA_LATCH2_NAND_CLE, 0)
#define T_NAND_CTL_SETCLE(iob) ams_delta_latch2_write(AMS_DELTA_LATCH2_NAND_CLE, AMS_DELTA_LATCH2_NAND_CLE)
#define T_NAND_CTL_SETNCE(iob) ams_delta_latch2_write(AMS_DELTA_LATCH2_NAND_NCE, 0)
#define T_NAND_CTL_CLRNCE(iob) ams_delta_latch2_write(AMS_DELTA_LATCH2_NAND_NCE, AMS_DELTA_LATCH2_NAND_NCE)
/*
* Define partitions for flash devices
*/
@ -66,25 +59,6 @@ static struct mtd_partition partition_info[] = {
.size = 3 * SZ_256K },
};
/*
* hardware specific access to control-lines
*/
static void ams_delta_hwcontrol(struct mtd_info *mtd, int cmd)
{
switch (cmd) {
case NAND_CTL_SETCLE: T_NAND_CTL_SETCLE(cmd); break;
case NAND_CTL_CLRCLE: T_NAND_CTL_CLRCLE(cmd); break;
case NAND_CTL_SETALE: T_NAND_CTL_SETALE(cmd); break;
case NAND_CTL_CLRALE: T_NAND_CTL_CLRALE(cmd); break;
case NAND_CTL_SETNCE: T_NAND_CTL_SETNCE(cmd); break;
case NAND_CTL_CLRNCE: T_NAND_CTL_CLRNCE(cmd); break;
}
}
static void ams_delta_write_byte(struct mtd_info *mtd, u_char byte)
{
struct nand_chip *this = mtd->priv;
@ -141,6 +115,32 @@ static int ams_delta_verify_buf(struct mtd_info *mtd, const u_char *buf,
return 0;
}
/*
* Command control function
*
* ctrl:
* NAND_NCE: bit 0 -> bit 2
* NAND_CLE: bit 1 -> bit 7
* NAND_ALE: bit 2 -> bit 6
*/
static void ams_delta_hwcontrol(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
if (ctrl & NAND_CTRL_CHANGE) {
unsigned long bits;
bits = (~ctrl & NAND_NCE) << 2;
bits |= (ctrl & NAND_CLE) << 7;
bits |= (ctrl & NAND_ALE) << 6;
ams_delta_latch2_write(0xC2, bits);
}
if (cmd != NAND_CMD_NONE)
ams_delta_write_byte(mtd, cmd);
}
static int ams_delta_nand_ready(struct mtd_info *mtd)
{
return omap_get_gpio_datain(AMS_DELTA_GPIO_PIN_NAND_RB);
@ -183,7 +183,7 @@ static int __init ams_delta_init(void)
this->write_buf = ams_delta_write_buf;
this->read_buf = ams_delta_read_buf;
this->verify_buf = ams_delta_verify_buf;
this->hwcontrol = ams_delta_hwcontrol;
this->cmd_ctrl = ams_delta_hwcontrol;
if (!omap_request_gpio(AMS_DELTA_GPIO_PIN_NAND_RB)) {
this->dev_ready = ams_delta_nand_ready;
} else {
@ -200,7 +200,7 @@ static int __init ams_delta_init(void)
AMS_DELTA_LATCH2_NAND_NCE |
AMS_DELTA_LATCH2_NAND_NWP);
/* Scan to find existance of the device */
/* Scan to find existance of the device */
if (nand_scan(ams_delta_mtd, 1)) {
err = -ENXIO;
goto out_mtd;

25
drivers/mtd/nand/au1550nd.c
View file

@ -269,6 +269,18 @@ static int au_verify_buf16(struct mtd_info *mtd, const u_char *buf, int len)
return 0;
}
/* Select the chip by setting nCE to low */
#define NAND_CTL_SETNCE 1
/* Deselect the chip by setting nCE to high */
#define NAND_CTL_CLRNCE 2
/* Select the command latch by setting CLE to high */
#define NAND_CTL_SETCLE 3
/* Deselect the command latch by setting CLE to low */
#define NAND_CTL_CLRCLE 4
/* Select the address latch by setting ALE to high */
#define NAND_CTL_SETALE 5
/* Deselect the address latch by setting ALE to low */
#define NAND_CTL_CLRALE 6
static void au1550_hwcontrol(struct mtd_info *mtd, int cmd)
{
@ -349,7 +361,7 @@ static void au1550_command(struct mtd_info *mtd, unsigned command, int column, i
ulong flags;
/* Begin command latch cycle */
this->hwcontrol(mtd, NAND_CTL_SETCLE);
au1550_hwcontrol(mtd, NAND_CTL_SETCLE);
/*
* Write out the command to the device.
*/
@ -372,10 +384,10 @@ static void au1550_command(struct mtd_info *mtd, unsigned command, int column, i
this->write_byte(mtd, command);
/* Set ALE and clear CLE to start address cycle */
this->hwcontrol(mtd, NAND_CTL_CLRCLE);
au1550_hwcontrol(mtd, NAND_CTL_CLRCLE);
if (column != -1 || page_addr != -1) {
this->hwcontrol(mtd, NAND_CTL_SETALE);
au1550_hwcontrol(mtd, NAND_CTL_SETALE);
/* Serially input address */
if (column != -1) {
@ -400,7 +412,7 @@ static void au1550_command(struct mtd_info *mtd, unsigned command, int column, i
*/
ce_override = 1;
local_irq_save(flags);
this->hwcontrol(mtd, NAND_CTL_SETNCE);
au1550_hwcontrol(mtd, NAND_CTL_SETNCE);
}
this->write_byte(mtd, (u8)(page_addr >> 8));
@ -410,7 +422,7 @@ static void au1550_command(struct mtd_info *mtd, unsigned command, int column, i
this->write_byte(mtd, (u8)((page_addr >> 16) & 0x0f));
}
/* Latch in address */
this->hwcontrol(mtd, NAND_CTL_CLRALE);
au1550_hwcontrol(mtd, NAND_CTL_CLRALE);
}
/*
@ -443,7 +455,7 @@ static void au1550_command(struct mtd_info *mtd, unsigned command, int column, i
udelay(1);
/* Release -CE and re-enable interrupts. */
this->hwcontrol(mtd, NAND_CTL_CLRNCE);
au1550_hwcontrol(mtd, NAND_CTL_CLRNCE);
local_irq_restore(flags);
return;
}
@ -571,7 +583,6 @@ static int __init au1xxx_nand_init(void)
nand_width = au_readl(MEM_STCFG3) & (1 << 22);
/* Set address of hardware control function */
this->hwcontrol = au1550_hwcontrol;
this->dev_ready = au1550_device_ready;
this->select_chip = au1550_select_chip;
this->cmdfunc = au1550_command;

77
drivers/mtd/nand/autcpu12.c
View file

@ -4,7 +4,7 @@
* Copyright (c) 2002 Thomas Gleixner <tgxl@linutronix.de>
*
* Derived from drivers/mtd/spia.c
* Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
* Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
*
* $Id: autcpu12.c,v 1.23 2005/11/07 11:14:30 gleixner Exp $
*
@ -42,11 +42,6 @@
* MTD structure for AUTCPU12 board
*/
static struct mtd_info *autcpu12_mtd = NULL;
static int autcpu12_io_base = CS89712_VIRT_BASE;
static int autcpu12_fio_pbase = AUTCPU12_PHYS_SMC;
static int autcpu12_fio_ctrl = AUTCPU12_SMC_SELECT_OFFSET;
static int autcpu12_pedr = AUTCPU12_SMC_PORT_OFFSET;
static void __iomem *autcpu12_fio_base;
/*
@ -94,31 +89,42 @@ static struct mtd_partition partition_info128k[] = {
#define NUM_PARTITIONS128K 2
/*
* hardware specific access to control-lines
*/
static void autcpu12_hwcontrol(struct mtd_info *mtd, int cmd)
*
* ALE bit 4 autcpu12_pedr
* CLE bit 5 autcpu12_pedr
* NCE bit 0 fio_ctrl
*
*/
static void autcpu12_hwcontrol(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
switch (cmd) {
struct nand_chip *chip = mtd->priv;
case NAND_CTL_SETCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |= AUTCPU12_SMC_CLE; break;
case NAND_CTL_CLRCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_CLE; break;
if (ctrl & NAND_CTRL_CHANGE) {
void __iomem *addr
unsigned char bits;
case NAND_CTL_SETALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |= AUTCPU12_SMC_ALE; break;
case NAND_CTL_CLRALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_ALE; break;
addr = CS89712_VIRT_BASE + AUTCPU12_SMC_PORT_OFFSET;
bits = (ctrl & NAND_CLE) << 4;
bits |= (ctrl & NAND_ALE) << 2;
writeb((readb(addr) & ~0x30) | bits, addr);
case NAND_CTL_SETNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x01; break;
case NAND_CTL_CLRNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x00; break;
addr = autcpu12_fio_base + AUTCPU12_SMC_SELECT_OFFSET;
writeb((readb(addr) & ~0x1) | (ctrl & NAND_NCE), addr);
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, chip->IO_ADDR_W);
}
/*
* read device ready pin
*/
* read device ready pin
*/
int autcpu12_device_ready(struct mtd_info *mtd)
{
void __iomem *addr = CS89712_VIRT_BASE + AUTCPU12_SMC_PORT_OFFSET;
return ((*(volatile unsigned char *)(autcpu12_io_base + autcpu12_pedr)) & AUTCPU12_SMC_RDY) ? 1 : 0;
return readb(addr) & AUTCPU12_SMC_RDY;
}
/*
@ -130,7 +136,8 @@ static int __init autcpu12_init(void)
int err = 0;
/* Allocate memory for MTD device structure and private data */
autcpu12_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
autcpu12_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip),
GFP_KERNEL);
if (!autcpu12_mtd) {
printk("Unable to allocate AUTCPU12 NAND MTD device structure.\n");
err = -ENOMEM;
@ -138,7 +145,7 @@ static int __init autcpu12_init(void)
}
/* map physical adress */
autcpu12_fio_base = ioremap(autcpu12_fio_pbase, SZ_1K);
autcpu12_fio_base = ioremap(AUTCPU12_PHYS_SMC, SZ_1K);
if (!autcpu12_fio_base) {
printk("Ioremap autcpu12 SmartMedia Card failed\n");
err = -EIO;
@ -159,7 +166,7 @@ static int __init autcpu12_init(void)
/* Set address of NAND IO lines */
this->IO_ADDR_R = autcpu12_fio_base;
this->IO_ADDR_W = autcpu12_fio_base;
this->hwcontrol = autcpu12_hwcontrol;
this->cmd_ctrl = autcpu12_hwcontrol;
this->dev_ready = autcpu12_device_ready;
/* 20 us command delay time */
this->chip_delay = 20;
@ -179,10 +186,22 @@ static int __init autcpu12_init(void)
/* Register the partitions */
switch (autcpu12_mtd->size) {
case SZ_16M: add_mtd_partitions(autcpu12_mtd, partition_info16k, NUM_PARTITIONS16K); break;
case SZ_32M: add_mtd_partitions(autcpu12_mtd, partition_info32k, NUM_PARTITIONS32K); break;
case SZ_64M: add_mtd_partitions(autcpu12_mtd, partition_info64k, NUM_PARTITIONS64K); break;
case SZ_128M: add_mtd_partitions(autcpu12_mtd, partition_info128k, NUM_PARTITIONS128K); break;
case SZ_16M:
add_mtd_partitions(autcpu12_mtd, partition_info16k,
NUM_PARTITIONS16K);
break;
case SZ_32M:
add_mtd_partitions(autcpu12_mtd, partition_info32k,
NUM_PARTITIONS32K);
break;
case SZ_64M:
add_mtd_partitions(autcpu12_mtd, partition_info64k,
NUM_PARTITIONS64K);
break;
case SZ_128M:
add_mtd_partitions(autcpu12_mtd, partition_info128k,
NUM_PARTITIONS128K);
break;
default:
printk("Unsupported SmartMedia device\n");
err = -ENXIO;
@ -191,7 +210,7 @@ static int __init autcpu12_init(void)
goto out;
out_ior:
iounmap((void *)autcpu12_fio_base);
iounmap(autcpu12_fio_base);
out_mtd:
kfree(autcpu12_mtd);
out:
@ -209,7 +228,7 @@ static void __exit autcpu12_cleanup(void)
nand_release(autcpu12_mtd);
/* unmap physical adress */
iounmap((void *)autcpu12_fio_base);
iounmap(autcpu12_fio_base);
/* Free the MTD device structure */
kfree(autcpu12_mtd);

32
drivers/mtd/nand/cs553x_nand.c
View file

@ -131,33 +131,17 @@ static void cs553x_write_byte(struct mtd_info *mtd, u_char byte)
writeb(byte, this->IO_ADDR_W + 0x801);
}
static void cs553x_hwcontrol(struct mtd_info *mtd, int cmd)
static void cs553x_hwcontrol(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
struct nand_chip *this = mtd->priv;
void __iomem *mmio_base = this->IO_ADDR_R;
unsigned char ctl;
switch (cmd) {
case NAND_CTL_SETCLE:
ctl = CS_NAND_CTL_CLE;
break;
case NAND_CTL_CLRCLE:
case NAND_CTL_CLRALE:
case NAND_CTL_SETNCE:
ctl = 0;
break;
case NAND_CTL_SETALE:
ctl = CS_NAND_CTL_ALE;
break;
default:
case NAND_CTL_CLRNCE:
ctl = CS_NAND_CTL_CE;
break;
if (ctrl & NAND_CTRL_CHANGE) {
unsigned char ctl = (ctrl & ~NAND_CTRL_CHANGE ) ^ 0x01;
writeb(ctl, mmio_base + MM_NAND_CTL);
}
writeb(ctl, mmio_base + MM_NAND_CTL);
if (cmd != NAND_CMD_NONE)
cs553x_write_byte(mtd, cmd);
}
static int cs553x_device_ready(struct mtd_info *mtd)
@ -233,7 +217,7 @@ static int __init cs553x_init_one(int cs, int mmio, unsigned long adr)
goto out_mtd;
}
this->hwcontrol = cs553x_hwcontrol;
this->cmd_ctrl = cs553x_hwcontrol;
this->dev_ready = cs553x_device_ready;
this->read_byte = cs553x_read_byte;
this->write_byte = cs553x_write_byte;

77
drivers/mtd/nand/diskonchip.c
View file

@ -95,7 +95,8 @@ static u_char empty_write_ecc[6] = { 0x4b, 0x00, 0xe2, 0x0e, 0x93, 0xf7 };
#define DoC_is_Millennium(doc) ((doc)->ChipID == DOC_ChipID_DocMil)
#define DoC_is_2000(doc) ((doc)->ChipID == DOC_ChipID_Doc2k)
static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd);
static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd,
unsigned int bitmask);
static void doc200x_select_chip(struct mtd_info *mtd, int chip);
static int debug = 0;
@ -402,12 +403,10 @@ static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr)
uint16_t ret;
doc200x_select_chip(mtd, nr);
doc200x_hwcontrol(mtd, NAND_CTL_SETCLE);
this->write_byte(mtd, NAND_CMD_READID);
doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE);
doc200x_hwcontrol(mtd, NAND_CTL_SETALE);
this->write_byte(mtd, 0);
doc200x_hwcontrol(mtd, NAND_CTL_CLRALE);
doc200x_hwcontrol(mtd, NAND_CMD_READID,
NAND_CTRL_CLE | NAND_CTRL_CHANGE);
doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE);
doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
/* We cant' use dev_ready here, but at least we wait for the
* command to complete
@ -425,12 +424,11 @@ static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr)
} ident;
void __iomem *docptr = doc->virtadr;
doc200x_hwcontrol(mtd, NAND_CTL_SETCLE);
doc2000_write_byte(mtd, NAND_CMD_READID);
doc200x_hwcontrol(mtd, NAND_CTL_CLRCLE);
doc200x_hwcontrol(mtd, NAND_CTL_SETALE);
doc2000_write_byte(mtd, 0);
doc200x_hwcontrol(mtd, NAND_CTL_CLRALE);
doc200x_hwcontrol(mtd, NAND_CMD_READID,
NAND_CTRL_CLE | NAND_CTRL_CHANGE);
doc200x_hwcontrol(mtd, 0, NAND_CTRL_ALE | NAND_CTRL_CHANGE);
doc200x_hwcontrol(mtd, NAND_CMD_NONE,
NAND_NCE | NAND_CTRL_CHANGE);
udelay(50);
@ -690,54 +688,37 @@ static void doc200x_select_chip(struct mtd_info *mtd, int chip)
chip -= (floor * doc->chips_per_floor);
/* 11.4.4 -- deassert CE before changing chip */
doc200x_hwcontrol(mtd, NAND_CTL_CLRNCE);
doc200x_hwcontrol(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE);
WriteDOC(floor, docptr, FloorSelect);
WriteDOC(chip, docptr, CDSNDeviceSelect);
doc200x_hwcontrol(mtd, NAND_CTL_SETNCE);
doc200x_hwcontrol(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
doc->curchip = chip;
doc->curfloor = floor;
}
static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd)
#define CDSN_CTRL_MSK (CDSN_CTRL_CE | CDSN_CTRL_CLE | CDSN_CTRL_ALE)
static void doc200x_hwcontrol(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
struct nand_chip *this = mtd->priv;
struct doc_priv *doc = this->priv;
void __iomem *docptr = doc->virtadr;
switch (cmd) {
case NAND_CTL_SETNCE:
doc->CDSNControl |= CDSN_CTRL_CE;
break;
case NAND_CTL_CLRNCE:
doc->CDSNControl &= ~CDSN_CTRL_CE;
break;
case NAND_CTL_SETCLE:
doc->CDSNControl |= CDSN_CTRL_CLE;
break;
case NAND_CTL_CLRCLE:
doc->CDSNControl &= ~CDSN_CTRL_CLE;
break;
case NAND_CTL_SETALE:
doc->CDSNControl |= CDSN_CTRL_ALE;
break;
case NAND_CTL_CLRALE:
doc->CDSNControl &= ~CDSN_CTRL_ALE;
break;
case NAND_CTL_SETWP:
doc->CDSNControl |= CDSN_CTRL_WP;
break;
case NAND_CTL_CLRWP:
doc->CDSNControl &= ~CDSN_CTRL_WP;
break;
if (ctrl & NAND_CTRL_CHANGE) {
doc->CDSNControl &= ~CDSN_CTRL_MSK;
doc->CDSNControl |= ctrl & CDSN_CTRL_MSK;
if (debug)
printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl);
WriteDOC(doc->CDSNControl, docptr, CDSNControl);
/* 11.4.3 -- 4 NOPs after CSDNControl write */
DoC_Delay(doc, 4);
}
if (debug)
printk("hwcontrol(%d): %02x\n", cmd, doc->CDSNControl);
WriteDOC(doc->CDSNControl, docptr, CDSNControl);
/* 11.4.3 -- 4 NOPs after CSDNControl write */
DoC_Delay(doc, 4);
if (cmd != NAND_CMD_NONE)
this->write_byte(mtd, cmd);
}
static void doc2001plus_command(struct mtd_info *mtd, unsigned command, int column, int page_addr)
@ -1510,7 +1491,7 @@ static inline int __init doc2001plus_init(struct mtd_info *mtd)
this->read_buf = doc2001plus_readbuf;
this->verify_buf = doc2001plus_verifybuf;
this->scan_bbt = inftl_scan_bbt;
this->hwcontrol = NULL;
this->cmd_ctrl = NULL;
this->select_chip = doc2001plus_select_chip;
this->cmdfunc = doc2001plus_command;
this->ecc.hwctl = doc2001plus_enable_hwecc;
@ -1670,7 +1651,7 @@ static int __init doc_probe(unsigned long physadr)
nand->priv = doc;
nand->select_chip = doc200x_select_chip;
nand->hwcontrol = doc200x_hwcontrol;
nand->cmd_ctrl = doc200x_hwcontrol;
nand->dev_ready = doc200x_dev_ready;
nand->waitfunc = doc200x_wait;
nand->block_bad = doc200x_block_bad;

36
drivers/mtd/nand/edb7312.c
View file

@ -73,32 +73,26 @@ static struct mtd_partition partition_info[] = {
/*
* hardware specific access to control-lines
*
* NAND_NCE: bit 0 -> bit 7
* NAND_CLE: bit 1 -> bit 4
* NAND_ALE: bit 2 -> bit 5
*/
static void ep7312_hwcontrol(struct mtd_info *mtd, int cmd)
static void ep7312_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
switch (cmd) {
struct nand_chip *chip = mtd->priv;
case NAND_CTL_SETCLE:
clps_writeb(clps_readb(ep7312_pxdr) | 0x10, ep7312_pxdr);
break;
case NAND_CTL_CLRCLE:
clps_writeb(clps_readb(ep7312_pxdr) & ~0x10, ep7312_pxdr);
break;
if (ctrl & NAND_CTRL_CHANGE) {
unsigned char bits;
case NAND_CTL_SETALE:
clps_writeb(clps_readb(ep7312_pxdr) | 0x20, ep7312_pxdr);
break;
case NAND_CTL_CLRALE:
clps_writeb(clps_readb(ep7312_pxdr) & ~0x20, ep7312_pxdr);
break;
bits = (ctrl & (NAND_CLE | NAND_ALE)) << 3;
bits = (ctrl & NAND_NCE) << 7;
case NAND_CTL_SETNCE:
clps_writeb((clps_readb(ep7312_pxdr) | 0x80) & ~0x40, ep7312_pxdr);
break;
case NAND_CTL_CLRNCE:
clps_writeb((clps_readb(ep7312_pxdr) | 0x80) | 0x40, ep7312_pxdr);
break;
clps_writeb((clps_readb(ep7312_pxdr) & 0xB0) | 0x10,
ep7312_pxdr);
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, chip->IO_ADDR_W);
}
/*
@ -159,7 +153,7 @@ static int __init ep7312_init(void)
/* insert callbacks */
this->IO_ADDR_R = ep7312_fio_base;
this->IO_ADDR_W = ep7312_fio_base;
this->hwcontrol = ep7312_hwcontrol;
this->cmd_ctrl = ep7312_hwcontrol;
this->dev_ready = ep7312_device_ready;
/* 15 us command delay time */
this->chip_delay = 15;

38
drivers/mtd/nand/h1910.c
View file

@ -56,36 +56,18 @@ static struct mtd_partition partition_info[] = {
/*
* hardware specific access to control-lines
*
* NAND_NCE: bit 0 - don't care
* NAND_CLE: bit 1 - address bit 2
* NAND_ALE: bit 2 - address bit 3
*/
static void h1910_hwcontrol(struct mtd_info *mtd, int cmd)
static void h1910_hwcontrol(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
struct nand_chip *this = (struct nand_chip *)(mtd->priv);
struct nand_chip *chip = mtd->priv;
switch (cmd) {
case NAND_CTL_SETCLE:
this->IO_ADDR_R |= (1 << 2);
this->IO_ADDR_W |= (1 << 2);
break;
case NAND_CTL_CLRCLE:
this->IO_ADDR_R &= ~(1 << 2);
this->IO_ADDR_W &= ~(1 << 2);
break;
case NAND_CTL_SETALE:
this->IO_ADDR_R |= (1 << 3);
this->IO_ADDR_W |= (1 << 3);
break;
case NAND_CTL_CLRALE:
this->IO_ADDR_R &= ~(1 << 3);
this->IO_ADDR_W &= ~(1 << 3);
break;
case NAND_CTL_SETNCE:
break;
case NAND_CTL_CLRNCE:
break;
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, chip->IO_ADDR_W | ((ctrl & 0x6) << 1));
}
/*
@ -145,7 +127,7 @@ static int __init h1910_init(void)
/* insert callbacks */
this->IO_ADDR_R = nandaddr;
this->IO_ADDR_W = nandaddr;
this->hwcontrol = h1910_hwcontrol;
this->cmd_ctrl = h1910_hwcontrol;
this->dev_ready = NULL; /* unknown whether that was correct or not so we will just do it like this */
/* 15 us command delay time */
this->chip_delay = 50;

115
drivers/mtd/nand/nand_base.c
View file

@ -276,10 +276,10 @@ static void nand_select_chip(struct mtd_info *mtd, int chip)
struct nand_chip *this = mtd->priv;
switch (chip) {
case -1:
this->hwcontrol(mtd, NAND_CTL_CLRNCE);
this->cmd_ctrl(mtd, NAND_CMD_NONE, 0 | NAND_CTRL_CHANGE);
break;
case 0:
this->hwcontrol(mtd, NAND_CTL_SETNCE);
this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
break;
default:
@ -548,13 +548,12 @@ static void nand_wait_ready(struct mtd_info *mtd)
* Send command to NAND device. This function is used for small page
* devices (256/512 Bytes per page)
*/
static void nand_command(struct mtd_info *mtd, unsigned command, int column,
int page_addr)
static void nand_command(struct mtd_info *mtd, unsigned int command,
int column, int page_addr)
{
register struct nand_chip *this = mtd->priv;
int ctrl = NAND_CTRL_CLE | NAND_CTRL_CHANGE;
/* Begin command latch cycle */
this->hwcontrol(mtd, NAND_CTL_SETCLE);
/*
* Write out the command to the device.
*/
@ -572,33 +571,32 @@ static void nand_command(struct mtd_info *mtd, unsigned command, int column,
column -= 256;
readcmd = NAND_CMD_READ1;
}
this->write_byte(mtd, readcmd);
this->cmd_ctrl(mtd, readcmd, ctrl);
ctrl &= ~NAND_CTRL_CHANGE;
}
this->write_byte(mtd, command);
this->cmd_ctrl(mtd, command, ctrl);
/* 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) {
/* Adjust columns for 16 bit buswidth */
if (this->options & NAND_BUSWIDTH_16)
column >>= 1;
this->write_byte(mtd, column);
}
if (page_addr != -1) {
this->write_byte(mtd, (uint8_t)(page_addr & 0xff));
this->write_byte(mtd, (uint8_t)((page_addr >> 8) & 0xff));
/* One more address cycle for devices > 32MiB */
if (this->chipsize > (32 << 20))
this->write_byte(mtd, (uint8_t)((page_addr >> 16) & 0x0f));
}
/* Latch in address */
this->hwcontrol(mtd, NAND_CTL_CLRALE);
/*
* Address cycle, when necessary
*/
ctrl = NAND_CTRL_ALE | NAND_CTRL_CHANGE;
/* Serially input address */
if (column != -1) {
/* Adjust columns for 16 bit buswidth */
if (this->options & NAND_BUSWIDTH_16)
column >>= 1;
this->cmd_ctrl(mtd, column, ctrl);
ctrl &= ~NAND_CTRL_CHANGE;
}
if (page_addr != -1) {
this->cmd_ctrl(mtd, page_addr, ctrl);
ctrl &= ~NAND_CTRL_CHANGE;
this->cmd_ctrl(mtd, page_addr >> 8, ctrl);
/* One more address cycle for devices > 32MiB */
if (this->chipsize > (32 << 20))
this->cmd_ctrl(mtd, page_addr >> 16, ctrl);
}
this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
/*
* program and erase have their own busy handlers
@ -611,15 +609,16 @@ static void nand_command(struct mtd_info *mtd, unsigned command, int column,
case NAND_CMD_ERASE2:
case NAND_CMD_SEQIN:
case NAND_CMD_STATUS:
this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE);
return;
case NAND_CMD_RESET:
if (this->dev_ready)
break;
udelay(this->chip_delay);
this->hwcontrol(mtd, NAND_CTL_SETCLE);
this->write_byte(mtd, NAND_CMD_STATUS);
this->hwcontrol(mtd, NAND_CTL_CLRCLE);
this->cmd_ctrl(mtd, NAND_CMD_STATUS,
NAND_CTRL_CLE | NAND_CTRL_CHANGE);
this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE);
while (!(this->read_byte(mtd) & NAND_STATUS_READY)) ;
return;
@ -648,12 +647,13 @@ static void nand_command(struct mtd_info *mtd, unsigned command, int column,
* @column: the column address for this command, -1 if none
* @page_addr: the page address for this command, -1 if none
*
* Send command to NAND device. This is the version for the new large page devices
* We dont have the separate regions as we have in the small page devices.
* We must emulate NAND_CMD_READOOB to keep the code compatible.
* Send command to NAND device. This is the version for the new large page
* devices We dont have the separate regions as we have in the small page
* devices. We must emulate NAND_CMD_READOOB to keep the code compatible.
*
*/
static void nand_command_lp(struct mtd_info *mtd, unsigned command, int column, int page_addr)
static void nand_command_lp(struct mtd_info *mtd, unsigned int command,
int column, int page_addr)
{
register struct nand_chip *this = mtd->priv;
@ -663,34 +663,33 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned command, int column,
command = NAND_CMD_READ0;
}
/* Begin command latch cycle */
this->hwcontrol(mtd, NAND_CTL_SETCLE);
/* Write out the command to the device. */
this->write_byte(mtd, (command & 0xff));
/* End command latch cycle */
this->hwcontrol(mtd, NAND_CTL_CLRCLE);
/* Command latch cycle */
this->cmd_ctrl(mtd, command & 0xff,
NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
if (column != -1 || page_addr != -1) {
this->hwcontrol(mtd, NAND_CTL_SETALE);
int ctrl = NAND_CTRL_CHANGE | NAND_NCE | NAND_ALE;
/* Serially input address */
if (column != -1) {
/* Adjust columns for 16 bit buswidth */
if (this->options & NAND_BUSWIDTH_16)
column >>= 1;
this->write_byte(mtd, column & 0xff);
this->write_byte(mtd, column >> 8);
this->cmd_ctrl(mtd, column, ctrl);
ctrl &= ~NAND_CTRL_CHANGE;
this->cmd_ctrl(mtd, column >> 8, ctrl);
}
if (page_addr != -1) {
this->write_byte(mtd, (uint8_t)(page_addr & 0xff));
this->write_byte(mtd, (uint8_t)((page_addr >> 8) & 0xff));
this->cmd_ctrl(mtd, page_addr, ctrl);
this->cmd_ctrl(mtd, page_addr >> 8,
NAND_NCE | NAND_ALE);
/* One more address cycle for devices > 128MiB */
if (this->chipsize > (128 << 20))
this->write_byte(mtd, (uint8_t)((page_addr >> 16) & 0xff));
this->cmd_ctrl(mtd, page_addr >> 16,
NAND_NCE | NAND_ALE);
}
/* Latch in address */
this->hwcontrol(mtd, NAND_CTL_CLRALE);
}
this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
/*
* program and erase have their own busy handlers
@ -722,20 +721,14 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned command, int column,
if (this->dev_ready)
break;
udelay(this->chip_delay);
this->hwcontrol(mtd, NAND_CTL_SETCLE);
this->write_byte(mtd, NAND_CMD_STATUS);
this->hwcontrol(mtd, NAND_CTL_CLRCLE);
this->cmd_ctrl(mtd, NAND_CMD_STATUS, NAND_NCE | NAND_CLE);
this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE);
while (!(this->read_byte(mtd) & NAND_STATUS_READY)) ;
return;
case NAND_CMD_READ0:
/* Begin command latch cycle */
this->hwcontrol(mtd, NAND_CTL_SETCLE);
/* Write out the start read command */
this->write_byte(mtd, NAND_CMD_READSTART);
/* End command latch cycle */
this->hwcontrol(mtd, NAND_CTL_CLRCLE);
/* Fall through into ready check */
this->cmd_ctrl(mtd, NAND_CMD_READSTART, NAND_NCE | NAND_CLE);
this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE);
/* This applies to read commands */
default:

76
drivers/mtd/nand/nandsim.c
View file

@ -1071,68 +1071,6 @@ switch_state(struct nandsim *ns)
}
}
static void
ns_hwcontrol(struct mtd_info *mtd, int cmd)
{
struct nandsim *ns = (struct nandsim *)((struct nand_chip *)mtd->priv)->priv;
switch (cmd) {
/* set CLE line high */
case NAND_CTL_SETCLE:
NS_DBG("ns_hwcontrol: start command latch cycles\n");
ns->lines.cle = 1;
break;
/* set CLE line low */
case NAND_CTL_CLRCLE:
NS_DBG("ns_hwcontrol: stop command latch cycles\n");
ns->lines.cle = 0;
break;
/* set ALE line high */
case NAND_CTL_SETALE:
NS_DBG("ns_hwcontrol: start address latch cycles\n");
ns->lines.ale = 1;
break;
/* set ALE line low */
case NAND_CTL_CLRALE:
NS_DBG("ns_hwcontrol: stop address latch cycles\n");
ns->lines.ale = 0;
break;
/* set WP line high */
case NAND_CTL_SETWP:
NS_DBG("ns_hwcontrol: enable write protection\n");
ns->lines.wp = 1;
break;
/* set WP line low */
case NAND_CTL_CLRWP:
NS_DBG("ns_hwcontrol: disable write protection\n");
ns->lines.wp = 0;
break;
/* set CE line low */
case NAND_CTL_SETNCE:
NS_DBG("ns_hwcontrol: enable chip\n");
ns->lines.ce = 1;
break;
/* set CE line high */
case NAND_CTL_CLRNCE:
NS_DBG("ns_hwcontrol: disable chip\n");
ns->lines.ce = 0;
break;
default:
NS_ERR("hwcontrol: unknown command\n");
}
return;
}
static u_char
ns_nand_read_byte(struct mtd_info *mtd)
{
@ -1359,6 +1297,18 @@ ns_nand_write_byte(struct mtd_info *mtd, u_char byte)
return;
}
static void ns_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int bitmask)
{
struct nandsim *ns = ((struct nand_chip *)mtd->priv)->priv;
ns->lines.cle = bitmask & NAND_CLE ? 1 : 0;
ns->lines.ale = bitmask & NAND_ALE ? 1 : 0;
ns->lines.ce = bitmask & NAND_NCE ? 1 : 0;
if (cmd != NAND_CMD_NONE)
ns_nand_write_byte(mtd, cmd);
}
static int
ns_device_ready(struct mtd_info *mtd)
{
@ -1514,7 +1464,7 @@ static int __init ns_init_module(void)
/*
* Register simulator's callbacks.
*/
chip->hwcontrol = ns_hwcontrol;
chip->cmd_ctrl = ns_hwcontrol;
chip->read_byte = ns_nand_read_byte;
chip->dev_ready = ns_device_ready;
chip->write_byte = ns_nand_write_byte;

23
drivers/mtd/nand/ndfc.c
View file

@ -60,22 +60,17 @@ static void ndfc_select_chip(struct mtd_info *mtd, int chip)
writel(ccr, ndfc->ndfcbase + NDFC_CCR);
}
static void ndfc_hwcontrol(struct mtd_info *mtd, int cmd)
static void ndfc_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
struct ndfc_controller *ndfc = &ndfc_ctrl;
struct nand_chip *chip = mtd->priv;
switch (cmd) {
case NAND_CTL_SETCLE:
chip->IO_ADDR_W = ndfc->ndfcbase + NDFC_CMD;
break;
case NAND_CTL_SETALE:
chip->IO_ADDR_W = ndfc->ndfcbase + NDFC_ALE;
break;
default:
chip->IO_ADDR_W = ndfc->ndfcbase + NDFC_DATA;
break;
}
if (cmd == NAND_CMD_NONE)
return;
if (ctrl & NAND_CLE)
writel(cmd & 0xFF, chip->IO_ADDR_W + NDFC_CMD);
else
writel(cmd & 0xFF, chip->IO_ADDR_W + NDFC_ALE);
}
static int ndfc_ready(struct mtd_info *mtd)
@ -158,7 +153,7 @@ static void ndfc_chip_init(struct ndfc_nand_mtd *mtd)
chip->IO_ADDR_R = ndfc->ndfcbase + NDFC_DATA;
chip->IO_ADDR_W = ndfc->ndfcbase + NDFC_DATA;
chip->hwcontrol = ndfc_hwcontrol;
chip->cmd_ctrl = ndfc_hwcontrol;
chip->dev_ready = ndfc_ready;
chip->select_chip = ndfc_select_chip;
chip->chip_delay = 50;

98
drivers/mtd/nand/ppchameleonevb.c
View file

@ -108,54 +108,68 @@ extern int parse_cmdline_partitions(struct mtd_info *master, struct mtd_partitio
/*
* hardware specific access to control-lines
*/
static void ppchameleon_hwcontrol(struct mtd_info *mtdinfo, int cmd)
static void ppchameleon_hwcontrol(struct mtd_info *mtdinfo, int cmd,
unsigned int ctrl)
{
switch (cmd) {
struct nand_chip *chip = mtd->priv;
case NAND_CTL_SETCLE:
MACRO_NAND_CTL_SETCLE((unsigned long)CFG_NAND0_PADDR);
break;
case NAND_CTL_CLRCLE:
MACRO_NAND_CTL_CLRCLE((unsigned long)CFG_NAND0_PADDR);
break;
case NAND_CTL_SETALE:
MACRO_NAND_CTL_SETALE((unsigned long)CFG_NAND0_PADDR);
break;
case NAND_CTL_CLRALE:
MACRO_NAND_CTL_CLRALE((unsigned long)CFG_NAND0_PADDR);
break;
case NAND_CTL_SETNCE:
MACRO_NAND_ENABLE_CE((unsigned long)CFG_NAND0_PADDR);
break;
case NAND_CTL_CLRNCE:
MACRO_NAND_DISABLE_CE((unsigned long)CFG_NAND0_PADDR);
break;
if (ctrl & NAND_CTRL_CHANGE) {
#error Missing headerfiles. No way to fix this. -tglx
switch (cmd) {
case NAND_CTL_SETCLE:
MACRO_NAND_CTL_SETCLE((unsigned long)CFG_NAND0_PADDR);
break;
case NAND_CTL_CLRCLE:
MACRO_NAND_CTL_CLRCLE((unsigned long)CFG_NAND0_PADDR);
break;
case NAND_CTL_SETALE:
MACRO_NAND_CTL_SETALE((unsigned long)CFG_NAND0_PADDR);
break;
case NAND_CTL_CLRALE:
MACRO_NAND_CTL_CLRALE((unsigned long)CFG_NAND0_PADDR);
break;
case NAND_CTL_SETNCE:
MACRO_NAND_ENABLE_CE((unsigned long)CFG_NAND0_PADDR);
break;
case NAND_CTL_CLRNCE:
MACRO_NAND_DISABLE_CE((unsigned long)CFG_NAND0_PADDR);
break;
}
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, chip->IO_ADDR_W);
}
static void ppchameleonevb_hwcontrol(struct mtd_info *mtdinfo, int cmd)
static void ppchameleonevb_hwcontrol(struct mtd_info *mtdinfo, int cmd,
unsigned int ctrl)
{
switch (cmd) {
struct nand_chip *chip = mtd->priv;
case NAND_CTL_SETCLE:
MACRO_NAND_CTL_SETCLE((unsigned long)CFG_NAND1_PADDR);
break;
case NAND_CTL_CLRCLE:
MACRO_NAND_CTL_CLRCLE((unsigned long)CFG_NAND1_PADDR);
break;
case NAND_CTL_SETALE:
MACRO_NAND_CTL_SETALE((unsigned long)CFG_NAND1_PADDR);
break;
case NAND_CTL_CLRALE:
MACRO_NAND_CTL_CLRALE((unsigned long)CFG_NAND1_PADDR);
break;
case NAND_CTL_SETNCE:
MACRO_NAND_ENABLE_CE((unsigned long)CFG_NAND1_PADDR);
break;
case NAND_CTL_CLRNCE:
MACRO_NAND_DISABLE_CE((unsigned long)CFG_NAND1_PADDR);
break;
if (ctrl & NAND_CTRL_CHANGE) {
#error Missing headerfiles. No way to fix this. -tglx
switch (cmd) {
case NAND_CTL_SETCLE:
MACRO_NAND_CTL_SETCLE((unsigned long)CFG_NAND1_PADDR);
break;
case NAND_CTL_CLRCLE:
MACRO_NAND_CTL_CLRCLE((unsigned long)CFG_NAND1_PADDR);
break;
case NAND_CTL_SETALE:
MACRO_NAND_CTL_SETALE((unsigned long)CFG_NAND1_PADDR);
break;
case NAND_CTL_CLRALE:
MACRO_NAND_CTL_CLRALE((unsigned long)CFG_NAND1_PADDR);
break;
case NAND_CTL_SETNCE:
MACRO_NAND_ENABLE_CE((unsigned long)CFG_NAND1_PADDR);
break;
case NAND_CTL_CLRNCE:
MACRO_NAND_DISABLE_CE((unsigned long)CFG_NAND1_PADDR);
break;
}
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, chip->IO_ADDR_W);
}
#ifdef USE_READY_BUSY_PIN
@ -251,7 +265,7 @@ static int __init ppchameleonevb_init(void)
/* insert callbacks */
this->IO_ADDR_R = ppchameleon_fio_base;
this->IO_ADDR_W = ppchameleon_fio_base;
this->hwcontrol = ppchameleon_hwcontrol;
this->cmd_ctrl = ppchameleon_hwcontrol;
#ifdef USE_READY_BUSY_PIN
this->dev_ready = ppchameleon_device_ready;
#endif
@ -351,7 +365,7 @@ static int __init ppchameleonevb_init(void)
/* insert callbacks */
this->IO_ADDR_R = ppchameleonevb_fio_base;
this->IO_ADDR_W = ppchameleonevb_fio_base;
this->hwcontrol = ppchameleonevb_hwcontrol;
this->cmd_ctrl = ppchameleonevb_hwcontrol;
#ifdef USE_READY_BUSY_PIN
this->dev_ready = ppchameleonevb_device_ready;
#endif

34
drivers/mtd/nand/rtc_from4.c
View file

@ -208,32 +208,18 @@ static uint8_t revbits[256] = {
* Address lines (A24-A22), so no action is required here.
*
*/
static void rtc_from4_hwcontrol(struct mtd_info *mtd, int cmd)
static void rtc_from4_hwcontrol(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
struct nand_chip *this = (struct nand_chip *)(mtd->priv);
struct nand_chip *chip = (mtd->priv);
switch (cmd) {
if (cmd == NAND_CMD_NONE)
return;
case NAND_CTL_SETCLE:
this->IO_ADDR_W = (void __iomem *)((unsigned long)this->IO_ADDR_W | RTC_FROM4_CLE);
break;
case NAND_CTL_CLRCLE:
this->IO_ADDR_W = (void __iomem *)((unsigned long)this->IO_ADDR_W & ~RTC_FROM4_CLE);
break;
case NAND_CTL_SETALE:
this->IO_ADDR_W = (void __iomem *)((unsigned long)this->IO_ADDR_W | RTC_FROM4_ALE);
break;
case NAND_CTL_CLRALE:
this->IO_ADDR_W = (void __iomem *)((unsigned long)this->IO_ADDR_W & ~RTC_FROM4_ALE);
break;
case NAND_CTL_SETNCE:
break;
case NAND_CTL_CLRNCE:
break;
}
if (ctrl & NAND_CLE)
writeb(cmd, chip->IO_ADDR_W | RTC_FROM4_CLE);
else
writeb(cmd, chip->IO_ADDR_W | RTC_FROM4_ALE);
}
/*
@ -559,7 +545,7 @@ static int __init rtc_from4_init(void)
this->IO_ADDR_R = rtc_from4_fio_base;
this->IO_ADDR_W = rtc_from4_fio_base;
/* Set address of hardware control function */
this->hwcontrol = rtc_from4_hwcontrol;
this->cmd_ctrl = rtc_from4_hwcontrol;
/* Set address of chip select function */
this->select_chip = rtc_from4_nand_select_chip;
/* command delay time (in us) */

60
drivers/mtd/nand/s3c2410.c
View file

@ -256,60 +256,36 @@ static void s3c2410_nand_select_chip(struct mtd_info *mtd, int chip)
*
*/
static void s3c2410_nand_hwcontrol(struct mtd_info *mtd, int cmd)
static void s3c2410_nand_hwcontrol(struct mtd_info *mtd, int cmd,
unsigend int ctrl)
{
struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
struct nand_chip *chip = mtd->priv;
switch (cmd) {
case NAND_CTL_SETNCE:
case NAND_CTL_CLRNCE:
printk(KERN_ERR "%s: called for NCE\n", __FUNCTION__);
break;
if (cmd == NAND_CMD_NONE)
return;
case NAND_CTL_SETCLE:
chip->IO_ADDR_W = info->regs + S3C2410_NFCMD;
break;
case NAND_CTL_SETALE:
chip->IO_ADDR_W = info->regs + S3C2410_NFADDR;
break;
/* NAND_CTL_CLRCLE: */
/* NAND_CTL_CLRALE: */
default:
chip->IO_ADDR_W = info->regs + S3C2410_NFDATA;
break;
}
if (cmd & NAND_CLE)
writeb(cmd, info->regs + S3C2410_NFCMD);
else
writeb(cmd, info->regs + S3C2410_NFADDR);
}
/* command and control functions */
static void s3c2440_nand_hwcontrol(struct mtd_info *mtd, int cmd)
static void s3c2410_nand_hwcontrol(struct mtd_info *mtd, int cmd,
unsigend int ctrl)
{
struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
struct nand_chip *chip = mtd->priv;
switch (cmd) {
case NAND_CTL_SETNCE:
case NAND_CTL_CLRNCE:
printk(KERN_ERR "%s: called for NCE\n", __FUNCTION__);
break;
if (cmd == NAND_CMD_NONE)
return;
case NAND_CTL_SETCLE:
chip->IO_ADDR_W = info->regs + S3C2440_NFCMD;
break;
case NAND_CTL_SETALE:
chip->IO_ADDR_W = info->regs + S3C2440_NFADDR;
break;
/* NAND_CTL_CLRCLE: */
/* NAND_CTL_CLRALE: */
default:
chip->IO_ADDR_W = info->regs + S3C2440_NFDATA;
break;
}
if (cmd & NAND_CLE)
writeb(cmd, info->regs + S3C2440_NFCMD);
else
writeb(cmd, info->regs + S3C2440_NFADDR);
}
/* s3c2410_nand_devready()
@ -498,7 +474,7 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
chip->IO_ADDR_R = info->regs + S3C2410_NFDATA;
chip->IO_ADDR_W = info->regs + S3C2410_NFDATA;
chip->hwcontrol = s3c2410_nand_hwcontrol;
chip->cmd_ctrl = s3c2410_nand_hwcontrol;
chip->dev_ready = s3c2410_nand_devready;
chip->write_buf = s3c2410_nand_write_buf;
chip->read_buf = s3c2410_nand_read_buf;
@ -511,7 +487,7 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
if (info->is_s3c2440) {
chip->IO_ADDR_R = info->regs + S3C2440_NFDATA;
chip->IO_ADDR_W = info->regs + S3C2440_NFDATA;
chip->hwcontrol = s3c2440_nand_hwcontrol;
chip->cmd_ctrl = s3c2440_nand_hwcontrol;
}
nmtd->info = info;

37
drivers/mtd/nand/sharpsl.c
View file

@ -77,31 +77,26 @@ static struct mtd_partition sharpsl_nand_default_partition_info[] = {
/*
* hardware specific access to control-lines
* ctrl:
* NAND_CNE: bit 0 -> bit 0 & 4
* NAND_CLE: bit 1 -> bit 1
* NAND_ALE: bit 2 -> bit 2
*
*/
static void sharpsl_nand_hwcontrol(struct mtd_info *mtd, int cmd)
static void sharpsl_nand_hwcontrol(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
switch (cmd) {
case NAND_CTL_SETCLE:
writeb(readb(FLASHCTL) | FLCLE, FLASHCTL);
break;
case NAND_CTL_CLRCLE:
writeb(readb(FLASHCTL) & ~FLCLE, FLASHCTL);
break;
struct nand_chip *chip = mtd->priv;
case NAND_CTL_SETALE:
writeb(readb(FLASHCTL) | FLALE, FLASHCTL);
break;
case NAND_CTL_CLRALE:
writeb(readb(FLASHCTL) & ~FLALE, FLASHCTL);
break;
if (ctrl & NAND_CTRL_CHANGE) {
unsigned char bits = ctrl & 0x07;
case NAND_CTL_SETNCE:
writeb(readb(FLASHCTL) & ~(FLCE0 | FLCE1), FLASHCTL);
break;
case NAND_CTL_CLRNCE:
writeb(readb(FLASHCTL) | (FLCE0 | FLCE1), FLASHCTL);
break;
bits |= (ctrl & 0x01) << 4;
writeb((readb(FLASHCTL) & 0x17) | bits, FLASHCTL);
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, chip->IO_ADDR_W);
}
static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
@ -196,7 +191,7 @@ static int __init sharpsl_nand_init(void)
this->IO_ADDR_R = FLASHIO;
this->IO_ADDR_W = FLASHIO;
/* Set address of hardware control function */
this->hwcontrol = sharpsl_nand_hwcontrol;
this->cmd_ctrl = sharpsl_nand_hwcontrol;
this->dev_ready = sharpsl_nand_dev_ready;
/* 15 us command delay time */
this->chip_delay = 15;

27
drivers/mtd/nand/spia.c
View file

@ -82,20 +82,27 @@ static const struct mtd_partition partition_info[] = {
/*
* hardware specific access to control-lines
*/
*
* ctrl:
* NAND_CNE: bit 0 -> bit 2
* NAND_CLE: bit 1 -> bit 0
* NAND_ALE: bit 2 -> bit 1
*/
static void spia_hwcontrol(struct mtd_info *mtd, int cmd)
{
switch (cmd) {
struct nand_chip *chip = mtd->priv;
case NAND_CTL_SETCLE: (*(volatile unsigned char *) (spia_io_base + spia_pedr)) |= 0x01; break;
case NAND_CTL_CLRCLE: (*(volatile unsigned char *) (spia_io_base + spia_pedr)) &= ~0x01; break;
if (ctrl & NAND_CTRL_CHANGE) {
void __iomem *addr = spia_io_base + spia_pedr;
unsigned char bits;
case NAND_CTL_SETALE: (*(volatile unsigned char *) (spia_io_base + spia_pedr)) |= 0x02; break;
case NAND_CTL_CLRALE: (*(volatile unsigned char *) (spia_io_base + spia_pedr)) &= ~0x02; break;
case NAND_CTL_SETNCE: (*(volatile unsigned char *) (spia_io_base + spia_pedr)) &= ~0x04; break;
case NAND_CTL_CLRNCE: (*(volatile unsigned char *) (spia_io_base + spia_pedr)) |= 0x04; break;
bits = (ctrl & NAND_CNE) << 2;
bits |= (ctrl & NAND_CLE | NAND_ALE) >> 1;
writeb((readb(addr) & ~0x7) | bits, addr);
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, chip->IO_ADDR_W);
}
/*
@ -133,7 +140,7 @@ static int __init spia_init(void)
this->IO_ADDR_R = (void __iomem *)spia_fio_base;
this->IO_ADDR_W = (void __iomem *)spia_fio_base;
/* Set address of hardware control function */
this->hwcontrol = spia_hwcontrol;
this->cmd_ctrl = spia_hwcontrol;
/* 15 us command delay time */
this->chip_delay = 15;

65
drivers/mtd/nand/toto.c
View file

@ -32,6 +32,8 @@
#include <asm/arch-omap1510/hardware.h>
#include <asm/arch/gpio.h>
#define CONFIG_NAND_WORKAROUND 1
/*
* MTD structure for TOTO board
*/
@ -39,25 +41,6 @@ static struct mtd_info *toto_mtd = NULL;
static unsigned long toto_io_base = OMAP_FLASH_1_BASE;
#define CONFIG_NAND_WORKAROUND 1
#define NAND_NCE 0x4000
#define NAND_CLE 0x1000
#define NAND_ALE 0x0002
#define NAND_MASK (NAND_CLE | NAND_ALE | NAND_NCE)
#define T_NAND_CTL_CLRALE(iob) gpiosetout(NAND_ALE, 0)
#define T_NAND_CTL_SETALE(iob) gpiosetout(NAND_ALE, NAND_ALE)
#ifdef CONFIG_NAND_WORKAROUND /* "some" dev boards busted, blue wired to rts2 :( */
#define T_NAND_CTL_CLRCLE(iob) gpiosetout(NAND_CLE, 0); rts2setout(2, 2)
#define T_NAND_CTL_SETCLE(iob) gpiosetout(NAND_CLE, NAND_CLE); rts2setout(2, 0)
#else
#define T_NAND_CTL_CLRCLE(iob) gpiosetout(NAND_CLE, 0)
#define T_NAND_CTL_SETCLE(iob) gpiosetout(NAND_CLE, NAND_CLE)
#endif
#define T_NAND_CTL_SETNCE(iob) gpiosetout(NAND_NCE, 0)
#define T_NAND_CTL_CLRNCE(iob) gpiosetout(NAND_NCE, NAND_NCE)
/*
* Define partitions for flash devices
*/
@ -91,25 +74,43 @@ static struct mtd_partition partition_info32M[] = {
#define NUM_PARTITIONS32M 3
#define NUM_PARTITIONS64M 4
/*
* hardware specific access to control-lines
*/
static void toto_hwcontrol(struct mtd_info *mtd, int cmd)
*
* ctrl:
* NAND_NCE: bit 0 -> bit 14 (0x4000)
* NAND_CLE: bit 1 -> bit 12 (0x1000)
* NAND_ALE: bit 2 -> bit 1 (0x0002)
*/
static void toto_hwcontrol(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
struct nand_chip *chip = mtd->priv;
udelay(1); /* hopefully enough time for tc make proceding write to clear */
switch (cmd) {
case NAND_CTL_SETCLE: T_NAND_CTL_SETCLE(cmd); break;
case NAND_CTL_CLRCLE: T_NAND_CTL_CLRCLE(cmd); break;
if (ctrl & NAND_CTRL_CHANGE) {
unsigned long bits;
case NAND_CTL_SETALE: T_NAND_CTL_SETALE(cmd); break;
case NAND_CTL_CLRALE: T_NAND_CTL_CLRALE(cmd); break;
/* hopefully enough time for tc make proceding write to clear */
udelay(1);
case NAND_CTL_SETNCE: T_NAND_CTL_SETNCE(cmd); break;
case NAND_CTL_CLRNCE: T_NAND_CTL_CLRNCE(cmd); break;
bits = (~ctrl & NAND_NCE) << 14;
bits |= (ctrl & NAND_CLE) << 12;
bits |= (ctrl & NAND_ALE) >> 1;
#warning Wild guess as gpiosetout() is nowhere defined in the kernel source - tglx
gpiosetout(0x5002, bits);
#ifdef CONFIG_NAND_WORKAROUND
/* "some" dev boards busted, blue wired to rts2 :( */
rts2setout(2, (ctrl & NAND_CLE) << 1);
#endif
/* allow time to ensure gpio state to over take memory write */
udelay(1);
}
udelay(1); /* allow time to ensure gpio state to over take memory write */
if (cmd != NAND_CMD_NONE)
writeb(cmd, chip->IO_ADDR_W);
}
/*
@ -142,7 +143,7 @@ static int __init toto_init(void)
/* Set address of NAND IO lines */
this->IO_ADDR_R = toto_io_base;
this->IO_ADDR_W = toto_io_base;
this->hwcontrol = toto_hwcontrol;
this->cmd_ctrl = toto_hwcontrol;
this->dev_ready = NULL;
/* 25 us command delay time */
this->chip_delay = 30;

42
drivers/mtd/nand/ts7250.c
View file

@ -83,31 +83,29 @@ static struct mtd_partition partition_info128[] = {
/*
* hardware specific access to control-lines
*
* ctrl:
* NAND_NCE: bit 0 -> bit 2
* NAND_CLE: bit 1 -> bit 1
* NAND_ALE: bit 2 -> bit 0
*/
static void ts7250_hwcontrol(struct mtd_info *mtd, int cmd)
static void ts7250_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
unsigned long ctrl = TS72XX_NAND_CONTROL_VIRT_BASE;
struct nand_chip *chip = mtd->priv;
switch (cmd) {
case NAND_CTL_SETCLE:
__raw_writeb(__raw_readb(ctrl) | 0x2, ctrl);
break;
case NAND_CTL_CLRCLE:
__raw_writeb(__raw_readb(ctrl) & ~0x2, ctrl);
break;
case NAND_CTL_SETALE:
__raw_writeb(__raw_readb(ctrl) | 0x1, ctrl);
break;
case NAND_CTL_CLRALE:
__raw_writeb(__raw_readb(ctrl) & ~0x1, ctrl);
break;
case NAND_CTL_SETNCE:
__raw_writeb(__raw_readb(ctrl) | 0x4, ctrl);
break;
case NAND_CTL_CLRNCE:
__raw_writeb(__raw_readb(ctrl) & ~0x4, ctrl);
break;
if (ctrl & NAND_CTRL_CHANGE) {
unsigned long addr = TS72XX_NAND_CONTROL_VIRT_BASE;
unsigned char bits;
bits = (ctrl & NAND_CNE) << 2;
bits |= ctrl & NAND_CLE;
bits |= (ctrl & NAND_ALE) >> 2;
__raw_writeb((__raw_readb(addr) & ~0x7) | bits, addr);
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, chip->IO_ADDR_W);
}
/*
@ -152,7 +150,7 @@ static int __init ts7250_init(void)
/* insert callbacks */
this->IO_ADDR_R = (void *)TS72XX_NAND_DATA_VIRT_BASE;
this->IO_ADDR_W = (void *)TS72XX_NAND_DATA_VIRT_BASE;
this->hwcontrol = ts7250_hwcontrol;
this->cmd_ctrl = ts7250_hwcontrol;
this->dev_ready = ts7250_device_ready;
this->chip_delay = 15;
this->ecc.mode = NAND_ECC_SOFT;

33
include/linux/mtd/nand.h
View file

@ -50,23 +50,20 @@ extern int nand_write_raw(struct mtd_info *mtd, loff_t to, size_t len,
/*
* Constants for hardware specific CLE/ALE/NCE function
*/
*
* These are bits which can be or'ed to set/clear multiple
* bits in one go.
*/
/* Select the chip by setting nCE to low */
#define NAND_CTL_SETNCE 1
/* Deselect the chip by setting nCE to high */
#define NAND_CTL_CLRNCE 2
#define NAND_NCE 0x01
/* Select the command latch by setting CLE to high */
#define NAND_CTL_SETCLE 3
/* Deselect the command latch by setting CLE to low */
#define NAND_CTL_CLRCLE 4
#define NAND_CLE 0x02
/* Select the address latch by setting ALE to high */
#define NAND_CTL_SETALE 5
/* Deselect the address latch by setting ALE to low */
#define NAND_CTL_CLRALE 6
/* Set write protection by setting WP to high. Not used! */
#define NAND_CTL_SETWP 7
/* Clear write protection by setting WP to low. Not used! */
#define NAND_CTL_CLRWP 8
#define NAND_ALE 0x04
#define NAND_CTRL_CLE (NAND_NCE | NAND_CLE)
#define NAND_CTRL_ALE (NAND_NCE | NAND_ALE)
#define NAND_CTRL_CHANGE 0x80
/*
* Standard NAND flash commands
@ -106,6 +103,8 @@ extern int nand_write_raw(struct mtd_info *mtd, loff_t to, size_t len,
#define NAND_CMD_STATUS_RESET 0x7f
#define NAND_CMD_STATUS_CLEAR 0xff
#define NAND_CMD_NONE -1
/* Status bits */
#define NAND_STATUS_FAIL 0x01
#define NAND_STATUS_FAIL_N1 0x02
@ -263,7 +262,8 @@ struct nand_ecc_ctrl {
* @select_chip: [REPLACEABLE] select chip nr
* @block_bad: [REPLACEABLE] check, if the block is bad
* @block_markbad: [REPLACEABLE] mark the block bad
* @hwcontrol: [BOARDSPECIFIC] hardwarespecific function for accesing control-lines
* @cmd_ctrl: [BOARDSPECIFIC] hardwarespecific funtion for controlling
* ALE/CLE/nCE. Also used to write command and address
* @dev_ready: [BOARDSPECIFIC] hardwarespecific function for accesing device ready/busy line
* If set to NULL no access to ready/busy is available and the ready/busy information
* is read from the chip status register
@ -317,7 +317,8 @@ struct nand_chip {
void (*select_chip)(struct mtd_info *mtd, int chip);
int (*block_bad)(struct mtd_info *mtd, loff_t ofs, int getchip);
int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
void (*hwcontrol)(struct mtd_info *mtd, int cmd);
void (*cmd_ctrl)(struct mtd_info *mtd, int dat,
unsigned int ctrl);
int (*dev_ready)(struct mtd_info *mtd);
void (*cmdfunc)(struct mtd_info *mtd, unsigned command, int column, int page_addr);
int (*waitfunc)(struct mtd_info *mtd, struct nand_chip *this, int state);