Commit 89677b27 authored by Michael Jones's avatar Michael Jones Committed by Albert ARIBAUD
Browse files

ARMV7: OMAP: I2C driver: cosmetic: make checkpatch-compatible


Signed-off-by: default avatarMichael Jones <michael.jones@matrix-vision.de>
Acked-by: default avatarHeiko Schocher <hs@denx.de>
Signed-off-by: default avatarSandeep Paulraj <s-paulraj@ti.com>
parent 0607e2b9
......@@ -31,8 +31,8 @@ DECLARE_GLOBAL_DATA_PTR;
#define I2C_TIMEOUT 1000
static void wait_for_bb (void);
static u16 wait_for_pin (void);
static void wait_for_bb(void);
static u16 wait_for_pin(void);
static void flush_fifo(void);
static struct i2c *i2c_base = (struct i2c *)I2C_DEFAULT_BASE;
......@@ -40,7 +40,7 @@ static struct i2c *i2c_base = (struct i2c *)I2C_DEFAULT_BASE;
static unsigned int bus_initialized[I2C_BUS_MAX];
static unsigned int current_bus;
void i2c_init (int speed, int slaveadd)
void i2c_init(int speed, int slaveadd)
{
int psc, fsscll, fssclh;
int hsscll = 0, hssclh = 0;
......@@ -107,9 +107,9 @@ void i2c_init (int speed, int slaveadd)
sclh = (unsigned int)fssclh;
}
if (readw (&i2c_base->con) & I2C_CON_EN) {
writew (0, &i2c_base->con);
udelay (50000);
if (readw(&i2c_base->con) & I2C_CON_EN) {
writew(0, &i2c_base->con);
udelay(50000);
}
writew(0x2, &i2c_base->sysc); /* for ES2 after soft reset */
......@@ -130,35 +130,36 @@ void i2c_init (int speed, int slaveadd)
writew(sclh, &i2c_base->sclh);
/* own address */
writew (slaveadd, &i2c_base->oa);
writew (I2C_CON_EN, &i2c_base->con);
writew(slaveadd, &i2c_base->oa);
writew(I2C_CON_EN, &i2c_base->con);
/* have to enable intrrupts or OMAP i2c module doesn't work */
writew (I2C_IE_XRDY_IE | I2C_IE_RRDY_IE | I2C_IE_ARDY_IE |
writew(I2C_IE_XRDY_IE | I2C_IE_RRDY_IE | I2C_IE_ARDY_IE |
I2C_IE_NACK_IE | I2C_IE_AL_IE, &i2c_base->ie);
udelay (1000);
udelay(1000);
flush_fifo();
writew (0xFFFF, &i2c_base->stat);
writew (0, &i2c_base->cnt);
writew(0xFFFF, &i2c_base->stat);
writew(0, &i2c_base->cnt);
if (gd->flags & GD_FLG_RELOC)
bus_initialized[current_bus] = 1;
}
static int i2c_read_byte (u8 devaddr, u8 regoffset, u8 * value)
static int i2c_read_byte(u8 devaddr, u8 regoffset, u8 *value)
{
int i2c_error = 0;
u16 status;
/* wait until bus not busy */
wait_for_bb ();
wait_for_bb();
/* one byte only */
writew (1, &i2c_base->cnt);
writew(1, &i2c_base->cnt);
/* set slave address */
writew (devaddr, &i2c_base->sa);
writew(devaddr, &i2c_base->sa);
/* no stop bit needed here */
writew (I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX, &i2c_base->con);
writew(I2C_CON_EN | I2C_CON_MST | I2C_CON_STT |
I2C_CON_TRX, &i2c_base->con);
/* send register offset */
while (1) {
......@@ -196,7 +197,7 @@ static int i2c_read_byte (u8 devaddr, u8 regoffset, u8 * value)
}
if (status & I2C_STAT_RRDY) {
#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
defined(CONFIG_OMAP44XX)
defined(CONFIG_OMAP44XX)
*value = readb(&i2c_base->data);
#else
*value = readw(&i2c_base->data);
......@@ -211,8 +212,8 @@ static int i2c_read_byte (u8 devaddr, u8 regoffset, u8 * value)
read_exit:
flush_fifo();
writew (0xFFFF, &i2c_base->stat);
writew (0, &i2c_base->cnt);
writew(0xFFFF, &i2c_base->stat);
writew(0, &i2c_base->cnt);
return i2c_error;
}
......@@ -222,38 +223,37 @@ static void flush_fifo(void)
/* note: if you try and read data when its not there or ready
* you get a bus error
*/
while(1){
while (1) {
stat = readw(&i2c_base->stat);
if(stat == I2C_STAT_RRDY){
if (stat == I2C_STAT_RRDY) {
#if defined(CONFIG_OMAP243X) || defined(CONFIG_OMAP34XX) || \
defined(CONFIG_OMAP44XX)
defined(CONFIG_OMAP44XX)
readb(&i2c_base->data);
#else
readw(&i2c_base->data);
#endif
writew(I2C_STAT_RRDY,&i2c_base->stat);
writew(I2C_STAT_RRDY, &i2c_base->stat);
udelay(1000);
}else
} else
break;
}
}
int i2c_probe (uchar chip)
int i2c_probe(uchar chip)
{
u16 status;
int res = 1; /* default = fail */
if (chip == readw (&i2c_base->oa)) {
if (chip == readw(&i2c_base->oa))
return res;
}
/* wait until bus not busy */
wait_for_bb ();
wait_for_bb();
/* try to write one byte */
writew (1, &i2c_base->cnt);
writew(1, &i2c_base->cnt);
/* set slave address */
writew (chip, &i2c_base->sa);
writew(chip, &i2c_base->sa);
/* stop bit needed here */
writew(I2C_CON_EN | I2C_CON_MST | I2C_CON_STT | I2C_CON_TRX |
I2C_CON_STP, &i2c_base->con);
......@@ -268,29 +268,30 @@ int i2c_probe (uchar chip)
writew(0, &i2c_base->con);
flush_fifo();
writew (0, &i2c_base->cnt); /* don't allow any more data in...we don't want it.*/
/* don't allow any more data in... we don't want it. */
writew(0, &i2c_base->cnt);
writew(0xFFFF, &i2c_base->stat);
return res;
}
int i2c_read (uchar chip, uint addr, int alen, uchar * buffer, int len)
int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
{
int i;
if (alen > 1) {
printf ("I2C read: addr len %d not supported\n", alen);
printf("I2C read: addr len %d not supported\n", alen);
return 1;
}
if (addr + len > 256) {
printf ("I2C read: address out of range\n");
printf("I2C read: address out of range\n");
return 1;
}
for (i = 0; i < len; i++) {
if (i2c_read_byte (chip, addr + i, &buffer[i])) {
printf ("I2C read: I/O error\n");
i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
if (i2c_read_byte(chip, addr + i, &buffer[i])) {
printf("I2C read: I/O error\n");
i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
return 1;
}
}
......@@ -298,7 +299,7 @@ int i2c_read (uchar chip, uint addr, int alen, uchar * buffer, int len)
return 0;
}
int i2c_write (uchar chip, uint addr, int alen, uchar * buffer, int len)
int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
{
int i;
u16 status;
......@@ -374,40 +375,40 @@ write_exit:
return i2c_error;
}
static void wait_for_bb (void)
static void wait_for_bb(void)
{
int timeout = I2C_TIMEOUT;
u16 stat;
writew(0xFFFF, &i2c_base->stat); /* clear current interrupts...*/
while ((stat = readw (&i2c_base->stat) & I2C_STAT_BB) && timeout--) {
writew (stat, &i2c_base->stat);
while ((stat = readw(&i2c_base->stat) & I2C_STAT_BB) && timeout--) {
writew(stat, &i2c_base->stat);
udelay(1000);
}
if (timeout <= 0) {
printf ("timed out in wait_for_bb: I2C_STAT=%x\n",
readw (&i2c_base->stat));
printf("timed out in wait_for_bb: I2C_STAT=%x\n",
readw(&i2c_base->stat));
}
writew(0xFFFF, &i2c_base->stat); /* clear delayed stuff*/
}
static u16 wait_for_pin (void)
static u16 wait_for_pin(void)
{
u16 status;
int timeout = I2C_TIMEOUT;
do {
udelay (1000);
status = readw (&i2c_base->stat);
} while ( !(status &
udelay(1000);
status = readw(&i2c_base->stat);
} while (!(status &
(I2C_STAT_ROVR | I2C_STAT_XUDF | I2C_STAT_XRDY |
I2C_STAT_RRDY | I2C_STAT_ARDY | I2C_STAT_NACK |
I2C_STAT_AL)) && timeout--);
if (timeout <= 0) {
printf ("timed out in wait_for_pin: I2C_STAT=%x\n",
readw (&i2c_base->stat));
printf("timed out in wait_for_pin: I2C_STAT=%x\n",
readw(&i2c_base->stat));
writew(0xFFFF, &i2c_base->stat);
status = 0;
}
......@@ -422,7 +423,7 @@ int i2c_set_bus_num(unsigned int bus)
return -1;
}
#if I2C_BUS_MAX==3
#if I2C_BUS_MAX == 3
if (bus == 2)
i2c_base = (struct i2c *)I2C_BASE3;
else
......@@ -434,7 +435,7 @@ int i2c_set_bus_num(unsigned int bus)
current_bus = bus;
if(!bus_initialized[current_bus])
if (!bus_initialized[current_bus])
i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
return 0;
......
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