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yaml
---
r: 27767
b: refs/heads/master
c: e0c7d76
h: refs/heads/master
i:
  27765: b8d12d9
  27763: 24e74b6
  27759: c6e3acd
v: v3
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David Woodhouse committed May 13, 2006
1 parent d557d4f commit 31c4e50
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Showing 18 changed files with 1,218 additions and 1,293 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 6943f8af7d6583be57d67bba8b2644371f6a10ca
refs/heads/master: e0c7d7675331140e5186d2d1a0efce1d3877d379
143 changes: 73 additions & 70 deletions trunk/drivers/mtd/nand/au1550nd.c
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Original file line number Diff line number Diff line change
Expand Up @@ -38,22 +38,20 @@
*/
static struct mtd_info *au1550_mtd = NULL;
static void __iomem *p_nand;
static int nand_width = 1; /* default x8*/
static int nand_width = 1; /* default x8 */

/*
* Define partitions for flash device
*/
static const struct mtd_partition partition_info[] = {
{
.name = "NAND FS 0",
.offset = 0,
.size = 8*1024*1024
},
.name = "NAND FS 0",
.offset = 0,
.size = 8 * 1024 * 1024},
{
.name = "NAND FS 1",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL
}
.name = "NAND FS 1",
.offset = MTDPART_OFS_APPEND,
.size = MTDPART_SIZ_FULL}
};

/**
Expand Down Expand Up @@ -157,7 +155,7 @@ static void au_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++) {
for (i = 0; i < len; i++) {
writeb(buf[i], this->IO_ADDR_W);
au_sync();
}
Expand All @@ -176,7 +174,7 @@ static void au_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++) {
for (i = 0; i < len; i++) {
buf[i] = readb(this->IO_ADDR_R);
au_sync();
}
Expand All @@ -195,7 +193,7 @@ static int au_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++) {
for (i = 0; i < len; i++) {
if (buf[i] != readb(this->IO_ADDR_R))
return -EFAULT;
au_sync();
Expand All @@ -219,7 +217,7 @@ static void au_write_buf16(struct mtd_info *mtd, const u_char *buf, int len)
u16 *p = (u16 *) buf;
len >>= 1;

for (i=0; i<len; i++) {
for (i = 0; i < len; i++) {
writew(p[i], this->IO_ADDR_W);
au_sync();
}
Expand All @@ -241,7 +239,7 @@ static void au_read_buf16(struct mtd_info *mtd, u_char *buf, int len)
u16 *p = (u16 *) buf;
len >>= 1;

for (i=0; i<len; i++) {
for (i = 0; i < len; i++) {
p[i] = readw(this->IO_ADDR_R);
au_sync();
}
Expand All @@ -262,7 +260,7 @@ static int au_verify_buf16(struct mtd_info *mtd, const u_char *buf, int len)
u16 *p = (u16 *) buf;
len >>= 1;

for (i=0; i<len; i++) {
for (i = 0; i < len; i++) {
if (p[i] != readw(this->IO_ADDR_R))
return -EFAULT;
au_sync();
Expand All @@ -275,27 +273,35 @@ static void au1550_hwcontrol(struct mtd_info *mtd, int cmd)
{
register struct nand_chip *this = mtd->priv;

switch(cmd){
switch (cmd) {

case NAND_CTL_SETCLE:
this->IO_ADDR_W = p_nand + MEM_STNAND_CMD;
break;

case NAND_CTL_CLRCLE:
this->IO_ADDR_W = p_nand + MEM_STNAND_DATA;
break;

case NAND_CTL_SETCLE: this->IO_ADDR_W = p_nand + MEM_STNAND_CMD; break;
case NAND_CTL_CLRCLE: this->IO_ADDR_W = p_nand + MEM_STNAND_DATA; break;
case NAND_CTL_SETALE:
this->IO_ADDR_W = p_nand + MEM_STNAND_ADDR;
break;

case NAND_CTL_SETALE: this->IO_ADDR_W = p_nand + MEM_STNAND_ADDR; break;
case NAND_CTL_CLRALE:
this->IO_ADDR_W = p_nand + MEM_STNAND_DATA;
/* FIXME: Nobody knows why this is neccecary,
/* FIXME: Nobody knows why this is necessary,
* but it works only that way */
udelay(1);
break;

case NAND_CTL_SETNCE:
/* assert (force assert) chip enable */
au_writel((1<<(4+NAND_CS)) , MEM_STNDCTL); break;
au_writel((1 << (4 + NAND_CS)), MEM_STNDCTL);
break;

case NAND_CTL_CLRNCE:
/* deassert chip enable */
au_writel(0, MEM_STNDCTL); break;
/* deassert chip enable */
au_writel(0, MEM_STNDCTL);
break;
}

Expand All @@ -315,66 +321,63 @@ int au1550_device_ready(struct mtd_info *mtd)
/*
* Main initialization routine
*/
int __init au1xxx_nand_init (void)
int __init au1xxx_nand_init(void)
{
struct nand_chip *this;
u16 boot_swapboot = 0; /* default value */
u16 boot_swapboot = 0; /* default value */
int retval;
u32 mem_staddr;
u32 nand_phys;

/* Allocate memory for MTD device structure and private data */
au1550_mtd = kmalloc (sizeof(struct mtd_info) +
sizeof (struct nand_chip), GFP_KERNEL);
au1550_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
if (!au1550_mtd) {
printk ("Unable to allocate NAND MTD dev structure.\n");
printk("Unable to allocate NAND MTD dev structure.\n");
return -ENOMEM;
}

/* Get pointer to private data */
this = (struct nand_chip *) (&au1550_mtd[1]);
this = (struct nand_chip *)(&au1550_mtd[1]);

/* Initialize structures */
memset((char *) au1550_mtd, 0, sizeof(struct mtd_info));
memset((char *) this, 0, sizeof(struct nand_chip));
memset(au1550_mtd, 0, sizeof(struct mtd_info));
memset(this, 0, sizeof(struct nand_chip));

/* Link the private data with the MTD structure */
au1550_mtd->priv = this;


/* disable interrupts */
au_writel(au_readl(MEM_STNDCTL) & ~(1<<8), MEM_STNDCTL);
au_writel(au_readl(MEM_STNDCTL) & ~(1 << 8), MEM_STNDCTL);

/* disable NAND boot */
au_writel(au_readl(MEM_STNDCTL) & ~(1<<0), MEM_STNDCTL);
au_writel(au_readl(MEM_STNDCTL) & ~(1 << 0), MEM_STNDCTL);

#ifdef CONFIG_MIPS_PB1550
/* set gpio206 high */
au_writel(au_readl(GPIO2_DIR) & ~(1<<6), GPIO2_DIR);
au_writel(au_readl(GPIO2_DIR) & ~(1 << 6), GPIO2_DIR);

boot_swapboot = (au_readl(MEM_STSTAT) & (0x7<<1)) |
((bcsr->status >> 6) & 0x1);
boot_swapboot = (au_readl(MEM_STSTAT) & (0x7 << 1)) | ((bcsr->status >> 6) & 0x1);
switch (boot_swapboot) {
case 0:
case 2:
case 8:
case 0xC:
case 0xD:
/* x16 NAND Flash */
nand_width = 0;
break;
case 1:
case 9:
case 3:
case 0xE:
case 0xF:
/* x8 NAND Flash */
nand_width = 1;
break;
default:
printk("Pb1550 NAND: bad boot:swap\n");
retval = -EINVAL;
goto outmem;
case 0:
case 2:
case 8:
case 0xC:
case 0xD:
/* x16 NAND Flash */
nand_width = 0;
break;
case 1:
case 9:
case 3:
case 0xE:
case 0xF:
/* x8 NAND Flash */
nand_width = 1;
break;
default:
printk("Pb1550 NAND: bad boot:swap\n");
retval = -EINVAL;
goto outmem;
}
#endif

Expand Down Expand Up @@ -424,14 +427,13 @@ int __init au1xxx_nand_init (void)

/* make controller and MTD agree */
if (NAND_CS == 0)
nand_width = au_readl(MEM_STCFG0) & (1<<22);
nand_width = au_readl(MEM_STCFG0) & (1 << 22);
if (NAND_CS == 1)
nand_width = au_readl(MEM_STCFG1) & (1<<22);
nand_width = au_readl(MEM_STCFG1) & (1 << 22);
if (NAND_CS == 2)
nand_width = au_readl(MEM_STCFG2) & (1<<22);
nand_width = au_readl(MEM_STCFG2) & (1 << 22);
if (NAND_CS == 3)
nand_width = au_readl(MEM_STCFG3) & (1<<22);

nand_width = au_readl(MEM_STCFG3) & (1 << 22);

/* Set address of hardware control function */
this->hwcontrol = au1550_hwcontrol;
Expand All @@ -454,7 +456,7 @@ int __init au1xxx_nand_init (void)
this->verify_buf = (!nand_width) ? au_verify_buf16 : au_verify_buf;

/* Scan to find existence of the device */
if (nand_scan (au1550_mtd, 1)) {
if (nand_scan(au1550_mtd, 1)) {
retval = -ENXIO;
goto outio;
}
Expand All @@ -465,10 +467,10 @@ int __init au1xxx_nand_init (void)
return 0;

outio:
iounmap ((void *)p_nand);
iounmap((void *)p_nand);

outmem:
kfree (au1550_mtd);
kfree(au1550_mtd);
return retval;
}

Expand All @@ -478,19 +480,20 @@ module_init(au1xxx_nand_init);
* Clean up routine
*/
#ifdef MODULE
static void __exit au1550_cleanup (void)
static void __exit au1550_cleanup(void)
{
struct nand_chip *this = (struct nand_chip *) &au1550_mtd[1];
struct nand_chip *this = (struct nand_chip *)&au1550_mtd[1];

/* Release resources, unregister device */
nand_release (au1550_mtd);
nand_release(au1550_mtd);

/* Free the MTD device structure */
kfree (au1550_mtd);
kfree(au1550_mtd);

/* Unmap */
iounmap ((void *)p_nand);
iounmap((void *)p_nand);
}

module_exit(au1550_cleanup);
#endif

Expand Down
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