/* define to enable debug messages */
#undef DEBUG_I2C
+DECLARE_GLOBAL_DATA_PTR;
+
/* uSec to wait between polls of the i2c */
#define DELAY_US 100
/* uSec to wait for the CPM to start processing the buffer */
PRINTD(("\t\tmoddiv=%d, brgdiv=%d\n", moddiv, brgdiv));
- *brgval = (brgdiv / 2) - 3 - (2*filter);
+ *brgval = ((brgdiv + 1) / 2) - 3 - (2*filter);
if ((*brgval < 0) || (*brgval > 255)) {
PRINTD(("\t\trejected brgval=%d\n", *brgval));
brgdiv = 2 * (*brgval + 3 + (2 * filter));
div = moddiv * brgdiv ;
- *totspeed = (hz + div - 1) / div;
+ *totspeed = hz / div;
PRINTD(("\t\taccepted brgval=%d, totspeed=%d\n", *brgval, *totspeed));
if ((diff >= 0) && (diff < bestspeed_diff))
{
- bestspeed_diff = diff ;
- bestspeed_modval = modval;
- bestspeed_brgval = brgval;
- bestspeed_filter = filter;
+ bestspeed_diff = diff ;
+ bestspeed_modval = modval;
+ bestspeed_brgval = brgval;
+ bestspeed_filter = filter;
}
}
}
void i2c_init(int speed, int slaveadd)
{
- DECLARE_GLOBAL_DATA_PTR;
-
volatile immap_t *immap = (immap_t *)CFG_IMMR ;
volatile cpm8260_t *cp = (cpm8260_t *)&immap->im_cpm;
volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
volatile I2C_BD *rxbd, *txbd;
uint dpaddr;
-#ifdef CFG_I2C_INIT_BOARD
+#ifdef CFG_I2C_INIT_BOARD
/* call board specific i2c bus reset routine before accessing the */
/* environment, which might be in a chip on that bus. For details */
/* about this problem see doc/I2C_Edge_Conditions. */
/*
* initialise data in dual port ram:
*
- * dpaddr -> parameter ram (64 bytes)
+ * dpaddr -> parameter ram (64 bytes)
* rbase -> rx BD (NUM_RX_BDS * sizeof(I2C_BD) bytes)
* tbase -> tx BD (NUM_TX_BDS * sizeof(I2C_BD) bytes)
* tx buffer (MAX_TX_SPACE bytes)
volatile iic_t *iip;
volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
volatile I2C_BD *txbd, *rxbd;
- int n, i, b, rxcnt = 0, rxtimeo = 0, txcnt = 0, txtimeo = 0, rc = 0;
+ int n, i, b, rxcnt = 0, rxtimeo = 0, txcnt = 0, txtimeo = 0, rc = 0;
uint dpaddr;
PRINTD(("[I2C] i2c_doio\n"));
rxbd = ((I2C_BD*)state->rxbd) - n;
for (i = 0; i < n; i++) {
- rxtimeo += TOUT_LOOP * rxbd->length;
+ rxtimeo += TOUT_LOOP * rxbd->length;
rxbd++;
}
* and the extra bits end up in the "chip address" bit slots.
* This makes a 24WC08 (1Kbyte) chip look like four 256 byte
* chips.
- *
+ *
* Note that we consider the length of the address field to still
* be one byte because the extra address bits are hidden in the
* chip address.
* and the extra bits end up in the "chip address" bit slots.
* This makes a 24WC08 (1Kbyte) chip look like four 256 byte
* chips.
- *
+ *
* Note that we consider the length of the address field to still
* be one byte because the extra address bits are hidden in the
* chip address.
uchar
i2c_reg_read(uchar chip, uchar reg)
{
- char buf;
+ uchar buf;
i2c_read(chip, reg, 1, &buf, 1);