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danube eeprom cleanup 

SVN-Revision: 9762
lede-17.01
John Crispin 2007-12-15 00:04:32 +00:00
parent 880d600f71
commit 66fea87684
1 changed files with 21 additions and 76 deletions
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97
target/linux/danube/files/drivers/char/danube_eeprom.c
View File

@ -61,15 +61,6 @@
/* allow the user to set the major device number */
static int danube_eeprom_maj = 0;
static ssize_t danube_eeprom_fops_read (struct file *, char *, size_t, loff_t *);
static ssize_t danube_eeprom_fops_write (struct file *, const char *, size_t,
loff_t *);
static int danube_eeprom_ioctl (struct inode *, struct file *, unsigned int,
unsigned long);
static int danube_eeprom_open (struct inode *, struct file *);
static int danube_eeprom_close (struct inode *, struct file *);
//ifx_ssc.c
extern int ifx_ssc_init (void);
extern int ifx_ssc_open (struct inode *inode, struct file *filp);
extern int ifx_ssc_close (struct inode *inode, struct file *filp);
@ -98,63 +89,30 @@ extern int ifx_ssc_rx (char *rx_buf, unsigned int rx_len);
#define EEPROM_SIZE 512
static int
eeprom_rdsr (char *status)
eeprom_rdsr (void)
{
int ret = 0;
unsigned char cmd = EEPROM_RDSR;
unsigned long flag;
char status;
local_irq_save(flag);
if ((ret = ifx_ssc_cs_low (EEPROM_CS)))
{
local_irq_restore(flag);
goto out;
}
if ((ret = ifx_ssc_txrx (&cmd, 1, status, 1)) < 0)
{
ifx_ssc_cs_high(EEPROM_CS);
local_irq_restore(flag);
goto out;
}
if ((ret = ifx_ssc_cs_high(EEPROM_CS)))
{
local_irq_restore(flag);
goto out;
}
if ((ret = ifx_ssc_cs_low(EEPROM_CS)) == 0)
if ((ret = ifx_ssc_txrx(&cmd, 1, &status, 1)) >= 0)
ret = status & 1;
ifx_ssc_cs_high(EEPROM_CS);
local_irq_restore(flag);
out:
return ret;
}
static inline int
void
eeprom_wip_over (void)
{
int ret = 0;
unsigned char status;
while (1)
{
ret = eeprom_rdsr(&status);
printk("status %x \n", status);
if (ret)
{
printk("read back status fails %d\n", ret);
break;
}
if (((status) & 1) != 0)
printk("read back status not zero %x\n", status);
else
break;
}
return ret;
while (eeprom_rdsr())
printk("waiting for eeprom\n");
}
static int
@ -165,29 +123,16 @@ eeprom_wren (void)
unsigned long flag;
local_irq_save(flag);
if ((ret = ifx_ssc_cs_low(EEPROM_CS)))
{
local_irq_restore(flag);
goto out;
}
if ((ret = ifx_ssc_tx(&cmd, 1)) < 0)
{
ifx_ssc_cs_high(EEPROM_CS);
local_irq_restore(flag);
goto out;
}
if ((ret = ifx_ssc_cs_high(EEPROM_CS)))
{
local_irq_restore(flag);
goto out;
}
if ((ret = ifx_ssc_cs_low(EEPROM_CS)) == 0)
if ((ret = ifx_ssc_tx(&cmd, 1)) >= 0)
ret = 0;
ifx_ssc_cs_high(EEPROM_CS);
local_irq_restore(flag);
eeprom_wip_over();
out:
if (!ret)
eeprom_wip_over();
return ret;
}
@ -388,7 +333,7 @@ danube_eeprom_read (char *buf, size_t len, unsigned int addr)
len = EEPROM_SIZE / 2;
}
if ((ret = ifx_ssc_open ((struct inode *) 0, NULL)))
if ((ret = ifx_ssc_open((struct inode *) 0, NULL)))
{
printk("danube_eeprom_open fails\n");
goto out;
@ -396,26 +341,26 @@ danube_eeprom_read (char *buf, size_t len, unsigned int addr)
data = (unsigned int)IFX_SSC_MODE_RXTX;
if ((ret = ifx_ssc_ioctl ((struct inode *) 0, NULL, IFX_SSC_RXTX_MODE_SET, (unsigned long) &data)))
if ((ret = ifx_ssc_ioctl((struct inode *) 0, NULL, IFX_SSC_RXTX_MODE_SET, (unsigned long) &data)))
{
printk("set RXTX mode fails\n");
goto out;
}
if ((ret = eeprom_wrsr ()))
if ((ret = eeprom_wrsr()))
{
printk("EEPROM reset fails\n");
goto out;
}
if ((ret = eeprom_read (addr, buf, len)))
if ((ret = eeprom_read(addr, buf, len)))
{
printk("eeprom read fails\n");
goto out;
}
out:
if (ifx_ssc_close ((struct inode *) 0, NULL))
if (ifx_ssc_close((struct inode *) 0, NULL))
printk("danube_eeprom_close fails\n");
return len;