DECLARE_GLOBAL_DATA_PTR;
-static const struct fsl_i2c *i2c_dev[4] = {
- (struct fsl_i2c *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C_OFFSET),
+static const struct fsl_i2c_base *i2c_base[4] = {
+ (struct fsl_i2c_base *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C_OFFSET),
#ifdef CONFIG_SYS_FSL_I2C2_OFFSET
- (struct fsl_i2c *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C2_OFFSET),
+ (struct fsl_i2c_base *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C2_OFFSET),
#endif
#ifdef CONFIG_SYS_FSL_I2C3_OFFSET
- (struct fsl_i2c *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C3_OFFSET),
+ (struct fsl_i2c_base *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C3_OFFSET),
#endif
#ifdef CONFIG_SYS_FSL_I2C4_OFFSET
- (struct fsl_i2c *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C4_OFFSET)
+ (struct fsl_i2c_base *)(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_I2C4_OFFSET)
#endif
};
/**
* Set the I2C bus speed for a given I2C device
*
- * @param dev: the I2C device
+ * @param base: the I2C device registers
* @i2c_clk: I2C bus clock frequency
* @speed: the desired speed of the bus
*
*
* The return value is the actual bus speed that is set.
*/
-static unsigned int set_i2c_bus_speed(const struct fsl_i2c *dev,
+static unsigned int set_i2c_bus_speed(const struct fsl_i2c_base *base,
unsigned int i2c_clk, unsigned int speed)
{
unsigned short divider = min(i2c_clk / speed, (unsigned int)USHRT_MAX);
debug("divider:%d, est_div:%ld, DFSR:%d\n", divider, est_div, dfsr);
debug("FDR:0x%.2x, speed:%d\n", fdr, speed);
#endif
- writeb(dfsr, &dev->dfsrr); /* set default filter */
- writeb(fdr, &dev->fdr); /* set bus speed */
+ writeb(dfsr, &base->dfsrr); /* set default filter */
+ writeb(fdr, &base->fdr); /* set bus speed */
#else
unsigned int i;
fdr = fsl_i2c_speed_map[i].fdr;
speed = i2c_clk / fsl_i2c_speed_map[i].divider;
- writeb(fdr, &dev->fdr); /* set bus speed */
+ writeb(fdr, &base->fdr); /* set bus speed */
break;
}
return gd->arch.i2c1_clk; /* I2C1 clock */
}
-static int fsl_i2c_fixup(const struct fsl_i2c *dev)
+static int fsl_i2c_fixup(const struct fsl_i2c_base *base)
{
const unsigned long long timeout = usec2ticks(CONFIG_I2C_MBB_TIMEOUT);
unsigned long long timeval = 0;
flags = I2C_CR_BIT6;
#endif
- writeb(I2C_CR_MEN | I2C_CR_MSTA, &dev->cr);
+ writeb(I2C_CR_MEN | I2C_CR_MSTA, &base->cr);
timeval = get_ticks();
- while (!(readb(&dev->sr) & I2C_SR_MBB)) {
+ while (!(readb(&base->sr) & I2C_SR_MBB)) {
if ((get_ticks() - timeval) > timeout)
goto err;
}
- if (readb(&dev->sr) & I2C_SR_MAL) {
+ if (readb(&base->sr) & I2C_SR_MAL) {
/* SDA is stuck low */
- writeb(0, &dev->cr);
+ writeb(0, &base->cr);
udelay(100);
- writeb(I2C_CR_MSTA | flags, &dev->cr);
- writeb(I2C_CR_MEN | I2C_CR_MSTA | flags, &dev->cr);
+ writeb(I2C_CR_MSTA | flags, &base->cr);
+ writeb(I2C_CR_MEN | I2C_CR_MSTA | flags, &base->cr);
}
- readb(&dev->dr);
+ readb(&base->dr);
timeval = get_ticks();
- while (!(readb(&dev->sr) & I2C_SR_MIF)) {
+ while (!(readb(&base->sr) & I2C_SR_MIF)) {
if ((get_ticks() - timeval) > timeout)
goto err;
}
ret = 0;
err:
- writeb(I2C_CR_MEN | flags, &dev->cr);
- writeb(0, &dev->sr);
+ writeb(I2C_CR_MEN | flags, &base->cr);
+ writeb(0, &base->sr);
udelay(100);
return ret;
static void fsl_i2c_init(struct i2c_adapter *adap, int speed, int slaveadd)
{
- const struct fsl_i2c *dev;
+ const struct fsl_i2c_base *base;
const unsigned long long timeout = usec2ticks(CONFIG_I2C_MBB_TIMEOUT);
unsigned long long timeval;
*/
i2c_init_board();
#endif
- dev = (struct fsl_i2c *)i2c_dev[adap->hwadapnr];
+ base = (struct fsl_i2c_base *)i2c_base[adap->hwadapnr];
- writeb(0, &dev->cr); /* stop I2C controller */
+ writeb(0, &base->cr); /* stop I2C controller */
udelay(5); /* let it shutdown in peace */
- set_i2c_bus_speed(dev, get_i2c_clock(adap->hwadapnr), speed);
- writeb(slaveadd << 1, &dev->adr);/* write slave address */
- writeb(0x0, &dev->sr); /* clear status register */
- writeb(I2C_CR_MEN, &dev->cr); /* start I2C controller */
+ set_i2c_bus_speed(base, get_i2c_clock(adap->hwadapnr), speed);
+ writeb(slaveadd << 1, &base->adr);/* write slave address */
+ writeb(0x0, &base->sr); /* clear status register */
+ writeb(I2C_CR_MEN, &base->cr); /* start I2C controller */
timeval = get_ticks();
- while (readb(&dev->sr) & I2C_SR_MBB) {
+ while (readb(&base->sr) & I2C_SR_MBB) {
if ((get_ticks() - timeval) < timeout)
continue;
- if (fsl_i2c_fixup(dev))
+ if (fsl_i2c_fixup(base))
debug("i2c_init: BUS#%d failed to init\n",
adap->hwadapnr);
static int
i2c_wait4bus(struct i2c_adapter *adap)
{
- struct fsl_i2c *dev = (struct fsl_i2c *)i2c_dev[adap->hwadapnr];
+ struct fsl_i2c_base *base =
+ (struct fsl_i2c_base *)i2c_base[adap->hwadapnr];
unsigned long long timeval = get_ticks();
const unsigned long long timeout = usec2ticks(CONFIG_I2C_MBB_TIMEOUT);
- while (readb(&dev->sr) & I2C_SR_MBB) {
+ while (readb(&base->sr) & I2C_SR_MBB) {
if ((get_ticks() - timeval) > timeout)
return -1;
}
u32 csr;
unsigned long long timeval = get_ticks();
const unsigned long long timeout = usec2ticks(CONFIG_I2C_TIMEOUT);
- struct fsl_i2c *dev = (struct fsl_i2c *)i2c_dev[adap->hwadapnr];
+ struct fsl_i2c_base *base =
+ (struct fsl_i2c_base *)i2c_base[adap->hwadapnr];
do {
- csr = readb(&dev->sr);
+ csr = readb(&base->sr);
if (!(csr & I2C_SR_MIF))
continue;
/* Read again to allow register to stabilise */
- csr = readb(&dev->sr);
+ csr = readb(&base->sr);
- writeb(0x0, &dev->sr);
+ writeb(0x0, &base->sr);
if (csr & I2C_SR_MAL) {
debug("i2c_wait: MAL\n");
static __inline__ int
i2c_write_addr(struct i2c_adapter *adap, u8 dev, u8 dir, int rsta)
{
- struct fsl_i2c *device = (struct fsl_i2c *)i2c_dev[adap->hwadapnr];
+ struct fsl_i2c_base *base =
+ (struct fsl_i2c_base *)i2c_base[adap->hwadapnr];
writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_MTX
| (rsta ? I2C_CR_RSTA : 0),
- &device->cr);
+ &base->cr);
- writeb((dev << 1) | dir, &device->dr);
+ writeb((dev << 1) | dir, &base->dr);
if (i2c_wait(adap, I2C_WRITE_BIT) < 0)
return 0;
static __inline__ int
__i2c_write(struct i2c_adapter *adap, u8 *data, int length)
{
- struct fsl_i2c *dev = (struct fsl_i2c *)i2c_dev[adap->hwadapnr];
+ struct fsl_i2c_base *base =
+ (struct fsl_i2c_base *)i2c_base[adap->hwadapnr];
int i;
for (i = 0; i < length; i++) {
- writeb(data[i], &dev->dr);
+ writeb(data[i], &base->dr);
if (i2c_wait(adap, I2C_WRITE_BIT) < 0)
break;
static __inline__ int
__i2c_read(struct i2c_adapter *adap, u8 *data, int length)
{
- struct fsl_i2c *dev = (struct fsl_i2c *)i2c_dev[adap->hwadapnr];
+ struct fsl_i2c_base *base =
+ (struct fsl_i2c_base *)i2c_base[adap->hwadapnr];
int i;
writeb(I2C_CR_MEN | I2C_CR_MSTA | ((length == 1) ? I2C_CR_TXAK : 0),
- &dev->cr);
+ &base->cr);
/* dummy read */
- readb(&dev->dr);
+ readb(&base->dr);
for (i = 0; i < length; i++) {
if (i2c_wait(adap, I2C_READ_BIT) < 0)
/* Generate ack on last next to last byte */
if (i == length - 2)
writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_TXAK,
- &dev->cr);
+ &base->cr);
/* Do not generate stop on last byte */
if (i == length - 1)
writeb(I2C_CR_MEN | I2C_CR_MSTA | I2C_CR_MTX,
- &dev->cr);
+ &base->cr);
- data[i] = readb(&dev->dr);
+ data[i] = readb(&base->dr);
}
return i;
fsl_i2c_read(struct i2c_adapter *adap, u8 dev, uint addr, int alen, u8 *data,
int length)
{
- struct fsl_i2c *device = (struct fsl_i2c *)i2c_dev[adap->hwadapnr];
+ struct fsl_i2c_base *base =
+ (struct fsl_i2c_base *)i2c_base[adap->hwadapnr];
int i = -1; /* signal error */
u8 *a = (u8*)&addr;
int len = alen * -1;
i = __i2c_read(adap, data, length);
}
- writeb(I2C_CR_MEN, &device->cr);
+ writeb(I2C_CR_MEN, &base->cr);
if (i2c_wait4bus(adap)) /* Wait until STOP */
debug("i2c_read: wait4bus timed out\n");
fsl_i2c_write(struct i2c_adapter *adap, u8 dev, uint addr, int alen,
u8 *data, int length)
{
- struct fsl_i2c *device = (struct fsl_i2c *)i2c_dev[adap->hwadapnr];
+ struct fsl_i2c_base *base =
+ (struct fsl_i2c_base *)i2c_base[adap->hwadapnr];
int i = -1; /* signal error */
u8 *a = (u8*)&addr;
i = __i2c_write(adap, data, length);
}
- writeb(I2C_CR_MEN, &device->cr);
+ writeb(I2C_CR_MEN, &base->cr);
if (i2c_wait4bus(adap)) /* Wait until STOP */
debug("i2c_write: wait4bus timed out\n");
static int
fsl_i2c_probe(struct i2c_adapter *adap, uchar chip)
{
- struct fsl_i2c *dev = (struct fsl_i2c *)i2c_dev[adap->hwadapnr];
+ struct fsl_i2c_base *base =
+ (struct fsl_i2c_base *)i2c_base[adap->hwadapnr];
/* For unknow reason the controller will ACK when
* probing for a slave with the same address, so skip
* it.
*/
- if (chip == (readb(&dev->adr) >> 1))
+ if (chip == (readb(&base->adr) >> 1))
return -1;
return fsl_i2c_read(adap, chip, 0, 0, NULL, 0);
static unsigned int fsl_i2c_set_bus_speed(struct i2c_adapter *adap,
unsigned int speed)
{
- struct fsl_i2c *dev = (struct fsl_i2c *)i2c_dev[adap->hwadapnr];
+ struct fsl_i2c_base *base =
+ (struct fsl_i2c_base *)i2c_base[adap->hwadapnr];
- writeb(0, &dev->cr); /* stop controller */
- set_i2c_bus_speed(dev, get_i2c_clock(adap->hwadapnr), speed);
- writeb(I2C_CR_MEN, &dev->cr); /* start controller */
+ writeb(0, &base->cr); /* stop controller */
+ set_i2c_bus_speed(base, get_i2c_clock(adap->hwadapnr), speed);
+ writeb(I2C_CR_MEN, &base->cr); /* start controller */
return 0;
}