summaryrefslogtreecommitdiffstats
path: root/drivers/atm/nicstarmac.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/atm/nicstarmac.c')
-rw-r--r--drivers/atm/nicstarmac.c364
1 files changed, 168 insertions, 196 deletions
diff --git a/drivers/atm/nicstarmac.c b/drivers/atm/nicstarmac.c
index 842e26c45557..f594526f8c6d 100644
--- a/drivers/atm/nicstarmac.c
+++ b/drivers/atm/nicstarmac.c
@@ -13,15 +13,15 @@ typedef void __iomem *virt_addr_t;
#define CYCLE_DELAY 5
-/* This was the original definition
+/*
+ This was the original definition
#define osp_MicroDelay(microsec) \
do { int _i = 4*microsec; while (--_i > 0) { __SLOW_DOWN_IO; }} while (0)
*/
#define osp_MicroDelay(microsec) {unsigned long useconds = (microsec); \
udelay((useconds));}
-
-
-/* The following tables represent the timing diagrams found in
+/*
+ * The following tables represent the timing diagrams found in
* the Data Sheet for the Xicor X25020 EEProm. The #defines below
* represent the bits in the NICStAR's General Purpose register
* that must be toggled for the corresponding actions on the EEProm
@@ -31,86 +31,80 @@ typedef void __iomem *virt_addr_t;
/* Write Data To EEProm from SI line on rising edge of CLK */
/* Read Data From EEProm on falling edge of CLK */
-#define CS_HIGH 0x0002 /* Chip select high */
-#define CS_LOW 0x0000 /* Chip select low (active low)*/
-#define CLK_HIGH 0x0004 /* Clock high */
-#define CLK_LOW 0x0000 /* Clock low */
-#define SI_HIGH 0x0001 /* Serial input data high */
-#define SI_LOW 0x0000 /* Serial input data low */
+#define CS_HIGH 0x0002 /* Chip select high */
+#define CS_LOW 0x0000 /* Chip select low (active low) */
+#define CLK_HIGH 0x0004 /* Clock high */
+#define CLK_LOW 0x0000 /* Clock low */
+#define SI_HIGH 0x0001 /* Serial input data high */
+#define SI_LOW 0x0000 /* Serial input data low */
/* Read Status Register = 0000 0101b */
#if 0
-static u_int32_t rdsrtab[] =
-{
- CS_HIGH | CLK_HIGH,
- CS_LOW | CLK_LOW,
- CLK_HIGH, /* 0 */
- CLK_LOW,
- CLK_HIGH, /* 0 */
- CLK_LOW,
- CLK_HIGH, /* 0 */
- CLK_LOW,
- CLK_HIGH, /* 0 */
- CLK_LOW,
- CLK_HIGH, /* 0 */
- CLK_LOW | SI_HIGH,
- CLK_HIGH | SI_HIGH, /* 1 */
- CLK_LOW | SI_LOW,
- CLK_HIGH, /* 0 */
- CLK_LOW | SI_HIGH,
- CLK_HIGH | SI_HIGH /* 1 */
+static u_int32_t rdsrtab[] = {
+ CS_HIGH | CLK_HIGH,
+ CS_LOW | CLK_LOW,
+ CLK_HIGH, /* 0 */
+ CLK_LOW,
+ CLK_HIGH, /* 0 */
+ CLK_LOW,
+ CLK_HIGH, /* 0 */
+ CLK_LOW,
+ CLK_HIGH, /* 0 */
+ CLK_LOW,
+ CLK_HIGH, /* 0 */
+ CLK_LOW | SI_HIGH,
+ CLK_HIGH | SI_HIGH, /* 1 */
+ CLK_LOW | SI_LOW,
+ CLK_HIGH, /* 0 */
+ CLK_LOW | SI_HIGH,
+ CLK_HIGH | SI_HIGH /* 1 */
};
-#endif /* 0 */
-
+#endif /* 0 */
/* Read from EEPROM = 0000 0011b */
-static u_int32_t readtab[] =
-{
- /*
- CS_HIGH | CLK_HIGH,
- */
- CS_LOW | CLK_LOW,
- CLK_HIGH, /* 0 */
- CLK_LOW,
- CLK_HIGH, /* 0 */
- CLK_LOW,
- CLK_HIGH, /* 0 */
- CLK_LOW,
- CLK_HIGH, /* 0 */
- CLK_LOW,
- CLK_HIGH, /* 0 */
- CLK_LOW,
- CLK_HIGH, /* 0 */
- CLK_LOW | SI_HIGH,
- CLK_HIGH | SI_HIGH, /* 1 */
- CLK_LOW | SI_HIGH,
- CLK_HIGH | SI_HIGH /* 1 */
+static u_int32_t readtab[] = {
+ /*
+ CS_HIGH | CLK_HIGH,
+ */
+ CS_LOW | CLK_LOW,
+ CLK_HIGH, /* 0 */
+ CLK_LOW,
+ CLK_HIGH, /* 0 */
+ CLK_LOW,
+ CLK_HIGH, /* 0 */
+ CLK_LOW,
+ CLK_HIGH, /* 0 */
+ CLK_LOW,
+ CLK_HIGH, /* 0 */
+ CLK_LOW,
+ CLK_HIGH, /* 0 */
+ CLK_LOW | SI_HIGH,
+ CLK_HIGH | SI_HIGH, /* 1 */
+ CLK_LOW | SI_HIGH,
+ CLK_HIGH | SI_HIGH /* 1 */
};
-
/* Clock to read from/write to the eeprom */
-static u_int32_t clocktab[] =
-{
- CLK_LOW,
- CLK_HIGH,
- CLK_LOW,
- CLK_HIGH,
- CLK_LOW,
- CLK_HIGH,
- CLK_LOW,
- CLK_HIGH,
- CLK_LOW,
- CLK_HIGH,
- CLK_LOW,
- CLK_HIGH,
- CLK_LOW,
- CLK_HIGH,
- CLK_LOW,
- CLK_HIGH,
- CLK_LOW
+static u_int32_t clocktab[] = {
+ CLK_LOW,
+ CLK_HIGH,
+ CLK_LOW,
+ CLK_HIGH,
+ CLK_LOW,
+ CLK_HIGH,
+ CLK_LOW,
+ CLK_HIGH,
+ CLK_LOW,
+ CLK_HIGH,
+ CLK_LOW,
+ CLK_HIGH,
+ CLK_LOW,
+ CLK_HIGH,
+ CLK_LOW,
+ CLK_HIGH,
+ CLK_LOW
};
-
#define NICSTAR_REG_WRITE(bs, reg, val) \
while ( readl(bs + STAT) & 0x0200 ) ; \
writel((val),(base)+(reg))
@@ -124,153 +118,131 @@ static u_int32_t clocktab[] =
* register.
*/
#if 0
-u_int32_t
-nicstar_read_eprom_status( virt_addr_t base )
+u_int32_t nicstar_read_eprom_status(virt_addr_t base)
{
- u_int32_t val;
- u_int32_t rbyte;
- int32_t i, j;
-
- /* Send read instruction */
- val = NICSTAR_REG_READ( base, NICSTAR_REG_GENERAL_PURPOSE ) & 0xFFFFFFF0;
-
- for (i=0; i<ARRAY_SIZE(rdsrtab); i++)
- {
- NICSTAR_REG_WRITE( base, NICSTAR_REG_GENERAL_PURPOSE,
- (val | rdsrtab[i]) );
- osp_MicroDelay( CYCLE_DELAY );
- }
-
- /* Done sending instruction - now pull data off of bit 16, MSB first */
- /* Data clocked out of eeprom on falling edge of clock */
-
- rbyte = 0;
- for (i=7, j=0; i>=0; i--)
- {
- NICSTAR_REG_WRITE( base, NICSTAR_REG_GENERAL_PURPOSE,
- (val | clocktab[j++]) );
- rbyte |= (((NICSTAR_REG_READ( base, NICSTAR_REG_GENERAL_PURPOSE)
- & 0x00010000) >> 16) << i);
- NICSTAR_REG_WRITE( base, NICSTAR_REG_GENERAL_PURPOSE,
- (val | clocktab[j++]) );
- osp_MicroDelay( CYCLE_DELAY );
- }
- NICSTAR_REG_WRITE( base, NICSTAR_REG_GENERAL_PURPOSE, 2 );
- osp_MicroDelay( CYCLE_DELAY );
- return rbyte;
+ u_int32_t val;
+ u_int32_t rbyte;
+ int32_t i, j;
+
+ /* Send read instruction */
+ val = NICSTAR_REG_READ(base, NICSTAR_REG_GENERAL_PURPOSE) & 0xFFFFFFF0;
+
+ for (i = 0; i < ARRAY_SIZE(rdsrtab); i++) {
+ NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
+ (val | rdsrtab[i]));
+ osp_MicroDelay(CYCLE_DELAY);
+ }
+
+ /* Done sending instruction - now pull data off of bit 16, MSB first */
+ /* Data clocked out of eeprom on falling edge of clock */
+
+ rbyte = 0;
+ for (i = 7, j = 0; i >= 0; i--) {
+ NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
+ (val | clocktab[j++]));
+ rbyte |= (((NICSTAR_REG_READ(base, NICSTAR_REG_GENERAL_PURPOSE)
+ & 0x00010000) >> 16) << i);
+ NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
+ (val | clocktab[j++]));
+ osp_MicroDelay(CYCLE_DELAY);
+ }
+ NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE, 2);
+ osp_MicroDelay(CYCLE_DELAY);
+ return rbyte;
}
-#endif /* 0 */
-
+#endif /* 0 */
/*
* This routine will clock the Read_data function into the X2520
* eeprom, followed by the address to read from, through the NicSTaR's General
* Purpose register.
*/
-
-static u_int8_t
-read_eprom_byte(virt_addr_t base, u_int8_t offset)
+
+static u_int8_t read_eprom_byte(virt_addr_t base, u_int8_t offset)
{
- u_int32_t val = 0;
- int i,j=0;
- u_int8_t tempread = 0;
-
- val = NICSTAR_REG_READ( base, NICSTAR_REG_GENERAL_PURPOSE ) & 0xFFFFFFF0;
-
- /* Send READ instruction */
- for (i=0; i<ARRAY_SIZE(readtab); i++)
- {
- NICSTAR_REG_WRITE( base, NICSTAR_REG_GENERAL_PURPOSE,
- (val | readtab[i]) );
- osp_MicroDelay( CYCLE_DELAY );
- }
-
- /* Next, we need to send the byte address to read from */
- for (i=7; i>=0; i--)
- {
- NICSTAR_REG_WRITE( base, NICSTAR_REG_GENERAL_PURPOSE,
- (val | clocktab[j++] | ((offset >> i) & 1) ) );
- osp_MicroDelay(CYCLE_DELAY);
- NICSTAR_REG_WRITE( base, NICSTAR_REG_GENERAL_PURPOSE,
- (val | clocktab[j++] | ((offset >> i) & 1) ) );
- osp_MicroDelay( CYCLE_DELAY );
- }
-
- j = 0;
-
- /* Now, we can read data from the eeprom by clocking it in */
- for (i=7; i>=0; i--)
- {
- NICSTAR_REG_WRITE( base, NICSTAR_REG_GENERAL_PURPOSE,
- (val | clocktab[j++]) );
- osp_MicroDelay( CYCLE_DELAY );
- tempread |= (((NICSTAR_REG_READ( base, NICSTAR_REG_GENERAL_PURPOSE )
- & 0x00010000) >> 16) << i);
- NICSTAR_REG_WRITE( base, NICSTAR_REG_GENERAL_PURPOSE,
- (val | clocktab[j++]) );
- osp_MicroDelay( CYCLE_DELAY );
- }
-
- NICSTAR_REG_WRITE( base, NICSTAR_REG_GENERAL_PURPOSE, 2 );
- osp_MicroDelay( CYCLE_DELAY );
- return tempread;
+ u_int32_t val = 0;
+ int i, j = 0;
+ u_int8_t tempread = 0;
+
+ val = NICSTAR_REG_READ(base, NICSTAR_REG_GENERAL_PURPOSE) & 0xFFFFFFF0;
+
+ /* Send READ instruction */
+ for (i = 0; i < ARRAY_SIZE(readtab); i++) {
+ NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
+ (val | readtab[i]));
+ osp_MicroDelay(CYCLE_DELAY);
+ }
+
+ /* Next, we need to send the byte address to read from */
+ for (i = 7; i >= 0; i--) {
+ NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
+ (val | clocktab[j++] | ((offset >> i) & 1)));
+ osp_MicroDelay(CYCLE_DELAY);
+ NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
+ (val | clocktab[j++] | ((offset >> i) & 1)));
+ osp_MicroDelay(CYCLE_DELAY);
+ }
+
+ j = 0;
+
+ /* Now, we can read data from the eeprom by clocking it in */
+ for (i = 7; i >= 0; i--) {
+ NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
+ (val | clocktab[j++]));
+ osp_MicroDelay(CYCLE_DELAY);
+ tempread |=
+ (((NICSTAR_REG_READ(base, NICSTAR_REG_GENERAL_PURPOSE)
+ & 0x00010000) >> 16) << i);
+ NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
+ (val | clocktab[j++]));
+ osp_MicroDelay(CYCLE_DELAY);
+ }
+
+ NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE, 2);
+ osp_MicroDelay(CYCLE_DELAY);
+ return tempread;
}
-
-static void
-nicstar_init_eprom( virt_addr_t base )
+static void nicstar_init_eprom(virt_addr_t base)
{
- u_int32_t val;
+ u_int32_t val;
- /*
- * turn chip select off
- */
- val = NICSTAR_REG_READ(base, NICSTAR_REG_GENERAL_PURPOSE) & 0xFFFFFFF0;
+ /*
+ * turn chip select off
+ */
+ val = NICSTAR_REG_READ(base, NICSTAR_REG_GENERAL_PURPOSE) & 0xFFFFFFF0;
- NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
- (val | CS_HIGH | CLK_HIGH));
- osp_MicroDelay( CYCLE_DELAY );
+ NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
+ (val | CS_HIGH | CLK_HIGH));
+ osp_MicroDelay(CYCLE_DELAY);
- NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
- (val | CS_HIGH | CLK_LOW));
- osp_MicroDelay( CYCLE_DELAY );
+ NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
+ (val | CS_HIGH | CLK_LOW));
+ osp_MicroDelay(CYCLE_DELAY);
- NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
- (val | CS_HIGH | CLK_HIGH));
- osp_MicroDelay( CYCLE_DELAY );
+ NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
+ (val | CS_HIGH | CLK_HIGH));
+ osp_MicroDelay(CYCLE_DELAY);
- NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
- (val | CS_HIGH | CLK_LOW));
- osp_MicroDelay( CYCLE_DELAY );
+ NICSTAR_REG_WRITE(base, NICSTAR_REG_GENERAL_PURPOSE,
+ (val | CS_HIGH | CLK_LOW));
+ osp_MicroDelay(CYCLE_DELAY);
}
-
/*
* This routine will be the interface to the ReadPromByte function
* above.
- */
+ */
static void
-nicstar_read_eprom(
- virt_addr_t base,
- u_int8_t prom_offset,
- u_int8_t *buffer,
- u_int32_t nbytes )
+nicstar_read_eprom(virt_addr_t base,
+ u_int8_t prom_offset, u_int8_t * buffer, u_int32_t nbytes)
{
- u_int i;
-
- for (i=0; i<nbytes; i++)
- {
- buffer[i] = read_eprom_byte( base, prom_offset );
- ++prom_offset;
- osp_MicroDelay( CYCLE_DELAY );
- }
-}
-
+ u_int i;
-/*
-void osp_MicroDelay(int x) {
-
+ for (i = 0; i < nbytes; i++) {
+ buffer[i] = read_eprom_byte(base, prom_offset);
+ ++prom_offset;
+ osp_MicroDelay(CYCLE_DELAY);
+ }
}
-*/
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 00:06:03 +0000