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Diffstat (limited to 'arch/powerpc/cpu/mpc8xx/i2c.c')
-rw-r--r--arch/powerpc/cpu/mpc8xx/i2c.c373
1 files changed, 188 insertions, 185 deletions
diff --git a/arch/powerpc/cpu/mpc8xx/i2c.c b/arch/powerpc/cpu/mpc8xx/i2c.c
index 1ca51fd..3e5ea3a 100644
--- a/arch/powerpc/cpu/mpc8xx/i2c.c
+++ b/arch/powerpc/cpu/mpc8xx/i2c.c
@@ -39,9 +39,6 @@
DECLARE_GLOBAL_DATA_PTR;
-/* define to enable debug messages */
-#undef DEBUG_I2C
-
/* tx/rx timeout (we need the i2c early, so we don't use get_timer()) */
#define TOUT_LOOP 1000000
@@ -50,13 +47,13 @@ DECLARE_GLOBAL_DATA_PTR;
#define MAX_TX_SPACE 256
#define I2C_RXTX_LEN 128 /* maximum tx/rx buffer length */
-typedef struct I2C_BD
-{
- unsigned short status;
- unsigned short length;
- unsigned char *addr;
+typedef struct I2C_BD {
+ unsigned short status;
+ unsigned short length;
+ unsigned char *addr;
} I2C_BD;
-#define BD_I2C_TX_START 0x0400 /* special status for i2c: Start condition */
+
+#define BD_I2C_TX_START 0x0400 /* special status for i2c: Start condition */
#define BD_I2C_TX_CL 0x0001 /* collision error */
#define BD_I2C_TX_UN 0x0002 /* underflow error */
@@ -65,47 +62,41 @@ typedef struct I2C_BD
#define BD_I2C_RX_ERR BD_SC_OV
-typedef void (*i2c_ecb_t)(int, int); /* error callback function */
+typedef void (*i2c_ecb_t) (int, int); /* error callback function */
/* This structure keeps track of the bd and buffer space usage. */
typedef struct i2c_state {
- int rx_idx; /* index to next free Rx BD */
- int tx_idx; /* index to next free Tx BD */
- void *rxbd; /* pointer to next free Rx BD */
- void *txbd; /* pointer to next free Tx BD */
- int tx_space; /* number of Tx bytes left */
- unsigned char *tx_buf; /* pointer to free Tx area */
- i2c_ecb_t err_cb; /* error callback function */
+ int rx_idx; /* index to next free Rx BD */
+ int tx_idx; /* index to next free Tx BD */
+ void *rxbd; /* pointer to next free Rx BD */
+ void *txbd; /* pointer to next free Tx BD */
+ int tx_space; /* number of Tx bytes left */
+ unsigned char *tx_buf; /* pointer to free Tx area */
+ i2c_ecb_t err_cb; /* error callback function */
} i2c_state_t;
/* flags for i2c_send() and i2c_receive() */
-#define I2CF_ENABLE_SECONDARY 0x01 /* secondary_address is valid */
-#define I2CF_START_COND 0x02 /* tx: generate start condition */
-#define I2CF_STOP_COND 0x04 /* tx: generate stop condition */
+#define I2CF_ENABLE_SECONDARY 0x01 /* secondary_address is valid */
+#define I2CF_START_COND 0x02 /* tx: generate start condition */
+#define I2CF_STOP_COND 0x04 /* tx: generate stop condition */
/* return codes */
-#define I2CERR_NO_BUFFERS 0x01 /* no more BDs or buffer space */
-#define I2CERR_MSG_TOO_LONG 0x02 /* tried to send/receive to much data */
-#define I2CERR_TIMEOUT 0x03 /* timeout in i2c_doio() */
-#define I2CERR_QUEUE_EMPTY 0x04 /* i2c_doio called without send/receive */
+#define I2CERR_NO_BUFFERS 0x01 /* no more BDs or buffer space */
+#define I2CERR_MSG_TOO_LONG 0x02 /* tried to send/receive to much data */
+#define I2CERR_TIMEOUT 0x03 /* timeout in i2c_doio() */
+#define I2CERR_QUEUE_EMPTY 0x04 /* i2c_doio called without send/receive */
/* error callback flags */
-#define I2CECB_RX_ERR 0x10 /* this is a receive error */
-#define I2CECB_RX_ERR_OV 0x02 /* receive overrun error */
-#define I2CECB_RX_MASK 0x0f /* mask for error bits */
-#define I2CECB_TX_ERR 0x20 /* this is a transmit error */
-#define I2CECB_TX_CL 0x01 /* transmit collision error */
-#define I2CECB_TX_UN 0x02 /* transmit underflow error */
-#define I2CECB_TX_NAK 0x04 /* transmit no ack error */
-#define I2CECB_TX_MASK 0x0f /* mask for error bits */
-#define I2CECB_TIMEOUT 0x40 /* this is a timeout error */
-
-#ifdef DEBUG_I2C
-#define PRINTD(x) printf x
-#else
-#define PRINTD(x)
-#endif
+#define I2CECB_RX_ERR 0x10 /* this is a receive error */
+#define I2CECB_RX_ERR_OV 0x02 /* receive overrun error */
+#define I2CECB_RX_MASK 0x0f /* mask for error bits */
+#define I2CECB_TX_ERR 0x20 /* this is a transmit error */
+#define I2CECB_TX_CL 0x01 /* transmit collision error */
+#define I2CECB_TX_UN 0x02 /* transmit underflow error */
+#define I2CECB_TX_NAK 0x04 /* transmit no ack error */
+#define I2CECB_TX_MASK 0x0f /* mask for error bits */
+#define I2CECB_TIMEOUT 0x40 /* this is a timeout error */
/*
* Returns the best value of I2BRG to meet desired clock speed of I2C with
@@ -115,53 +106,53 @@ typedef struct i2c_state {
*/
static inline int
i2c_roundrate(int hz, int speed, int filter, int modval,
- int *brgval, int *totspeed)
+ int *brgval, int *totspeed)
{
- int moddiv = 1 << (5-(modval & 3)), brgdiv, div;
+ int moddiv = 1 << (5 - (modval & 3)), brgdiv, div;
- PRINTD(("\t[I2C] trying hz=%d, speed=%d, filter=%d, modval=%d\n",
- hz, speed, filter, modval));
+ debug("\t[I2C] trying hz=%d, speed=%d, filter=%d, modval=%d\n",
+ hz, speed, filter, modval);
- div = moddiv * speed;
- brgdiv = (hz + div - 1) / div;
+ div = moddiv * speed;
+ brgdiv = (hz + div - 1) / div;
- PRINTD(("\t\tmoddiv=%d, brgdiv=%d\n", moddiv, brgdiv));
+ debug("\t\tmoddiv=%d, brgdiv=%d\n", moddiv, brgdiv);
- *brgval = ((brgdiv + 1) / 2) - 3 - (2*filter);
+ *brgval = ((brgdiv + 1) / 2) - 3 - (2 * filter);
- if ((*brgval < 0) || (*brgval > 255)) {
- PRINTD(("\t\trejected brgval=%d\n", *brgval));
- return -1;
- }
+ if ((*brgval < 0) || (*brgval > 255)) {
+ debug("\t\trejected brgval=%d\n", *brgval);
+ return -1;
+ }
- brgdiv = 2 * (*brgval + 3 + (2 * filter));
- div = moddiv * brgdiv ;
- *totspeed = hz / div;
+ brgdiv = 2 * (*brgval + 3 + (2 * filter));
+ div = moddiv * brgdiv;
+ *totspeed = hz / div;
- PRINTD(("\t\taccepted brgval=%d, totspeed=%d\n", *brgval, *totspeed));
+ debug("\t\taccepted brgval=%d, totspeed=%d\n", *brgval, *totspeed);
- return 0;
+ return 0;
}
/*
* Sets the I2C clock predivider and divider to meet required clock speed.
*/
-static int
-i2c_setrate (int hz, int speed)
+static int i2c_setrate(int hz, int speed)
{
- immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
+ immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
volatile i2c8xx_t *i2c = (i2c8xx_t *) & immap->im_i2c;
- int brgval,
- modval, /* 0-3 */
- bestspeed_diff = speed,
- bestspeed_brgval = 0,
- bestspeed_modval = 0,
- bestspeed_filter = 0,
- totspeed,
- filter = 0; /* Use this fixed value */
+ int brgval,
+ modval, /* 0-3 */
+ bestspeed_diff = speed,
+ bestspeed_brgval = 0,
+ bestspeed_modval = 0,
+ bestspeed_filter = 0,
+ totspeed,
+ filter = 0; /* Use this fixed value */
for (modval = 0; modval < 4; modval++) {
- if (i2c_roundrate(hz,speed,filter,modval,&brgval,&totspeed) == 0) {
+ if (i2c_roundrate
+ (hz, speed, filter, modval, &brgval, &totspeed) == 0) {
int diff = speed - totspeed;
if ((diff >= 0) && (diff < bestspeed_diff)) {
@@ -173,30 +164,31 @@ i2c_setrate (int hz, int speed)
}
}
- PRINTD (("[I2C] Best is:\n"));
- PRINTD (("[I2C] CPU=%dhz RATE=%d F=%d I2MOD=%08x I2BRG=%08x DIFF=%dhz\n",
+ debug("[I2C] Best is:\n");
+ debug("[I2C] CPU=%dhz RATE=%d F=%d I2MOD=%08x I2BRG=%08x DIFF=%dhz\n",
hz,
speed,
bestspeed_filter,
bestspeed_modval,
bestspeed_brgval,
- bestspeed_diff));
+ bestspeed_diff);
- i2c->i2c_i2mod |= ((bestspeed_modval & 3) << 1) | (bestspeed_filter << 3);
+ i2c->i2c_i2mod |=
+ ((bestspeed_modval & 3) << 1) | (bestspeed_filter << 3);
i2c->i2c_i2brg = bestspeed_brgval & 0xff;
- PRINTD (("[I2C] i2mod=%08x i2brg=%08x\n", i2c->i2c_i2mod,
- i2c->i2c_i2brg));
+ debug("[I2C] i2mod=%08x i2brg=%08x\n",
+ i2c->i2c_i2mod,
+ i2c->i2c_i2brg);
return 1;
}
-void
-i2c_init(int speed, int slaveaddr)
+void i2c_init(int speed, int slaveaddr)
{
- volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
+ volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
volatile cpm8xx_t *cp = (cpm8xx_t *)&immap->im_cpm;
- volatile i2c8xx_t *i2c = (i2c8xx_t *)&immap->im_i2c;
+ volatile i2c8xx_t *i2c = (i2c8xx_t *)&immap->im_i2c;
volatile iic_t *iip = (iic_t *)&cp->cp_dparam[PROFF_IIC];
ulong rbase, tbase;
volatile I2C_BD *rxbd, *txbd;
@@ -219,10 +211,10 @@ i2c_init(int speed, int slaveaddr)
#ifdef CONFIG_SYS_ALLOC_DPRAM
dpaddr = iip->iic_rbase;
if (dpaddr == 0) {
- /* need to allocate dual port ram */
- dpaddr = dpram_alloc_align(
- (NUM_RX_BDS * sizeof(I2C_BD)) + (NUM_TX_BDS * sizeof(I2C_BD)) +
- MAX_TX_SPACE, 8);
+ /* need to allocate dual port ram */
+ dpaddr = dpram_alloc_align((NUM_RX_BDS * sizeof(I2C_BD)) +
+ (NUM_TX_BDS * sizeof(I2C_BD)) +
+ MAX_TX_SPACE, 8);
}
#else
dpaddr = CPM_I2C_BASE;
@@ -255,25 +247,25 @@ i2c_init(int speed, int slaveaddr)
* and current CPU rate (we assume sccr dfbgr field is 0;
* divide BRGCLK by 1)
*/
- PRINTD(("[I2C] Setting rate...\n"));
- i2c_setrate (gd->cpu_clk, CONFIG_SYS_I2C_SPEED) ;
+ debug("[I2C] Setting rate...\n");
+ i2c_setrate(gd->cpu_clk, CONFIG_SYS_I2C_SPEED);
/* Set I2C controller in master mode */
i2c->i2c_i2com = 0x01;
/* Set SDMA bus arbitration level to 5 (SDCR) */
- immap->im_siu_conf.sc_sdcr = 0x0001 ;
+ immap->im_siu_conf.sc_sdcr = 0x0001;
/* Initialize Tx/Rx parameters */
iip->iic_rbase = rbase;
iip->iic_tbase = tbase;
- rxbd = (I2C_BD *)((unsigned char *)&cp->cp_dpmem[iip->iic_rbase]);
- txbd = (I2C_BD *)((unsigned char *)&cp->cp_dpmem[iip->iic_tbase]);
+ rxbd = (I2C_BD *) ((unsigned char *) &cp->cp_dpmem[iip->iic_rbase]);
+ txbd = (I2C_BD *) ((unsigned char *) &cp->cp_dpmem[iip->iic_tbase]);
- PRINTD(("[I2C] rbase = %04x\n", iip->iic_rbase));
- PRINTD(("[I2C] tbase = %04x\n", iip->iic_tbase));
- PRINTD(("[I2C] rxbd = %08x\n", (int)rxbd));
- PRINTD(("[I2C] txbd = %08x\n", (int)txbd));
+ debug("[I2C] rbase = %04x\n", iip->iic_rbase);
+ debug("[I2C] tbase = %04x\n", iip->iic_tbase);
+ debug("[I2C] rxbd = %08x\n", (int)rxbd);
+ debug("[I2C] txbd = %08x\n", (int)txbd);
/* Set big endian byte order */
iip->iic_tfcr = 0x10;
@@ -286,14 +278,14 @@ i2c_init(int speed, int slaveaddr)
/*
* Initialize required parameters if using microcode patch.
*/
- iip->iic_rbptr = iip->iic_rbase;
- iip->iic_tbptr = iip->iic_tbase;
+ iip->iic_rbptr = iip->iic_rbase;
+ iip->iic_tbptr = iip->iic_tbase;
iip->iic_rstate = 0;
iip->iic_tstate = 0;
#else
cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_I2C, CPM_CR_INIT_TRX) | CPM_CR_FLG;
do {
- __asm__ __volatile__ ("eieio");
+ __asm__ __volatile__("eieio");
} while (cp->cp_cpcr & CPM_CR_FLG);
#endif
@@ -302,29 +294,28 @@ i2c_init(int speed, int slaveaddr)
i2c->i2c_i2cmr = 0x00;
}
-static void
-i2c_newio(i2c_state_t *state)
+static void i2c_newio(i2c_state_t *state)
{
- volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
+ volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
volatile cpm8xx_t *cp = (cpm8xx_t *)&immap->im_cpm;
volatile iic_t *iip = (iic_t *)&cp->cp_dparam[PROFF_IIC];
- PRINTD(("[I2C] i2c_newio\n"));
+ debug("[I2C] i2c_newio\n");
#ifdef CONFIG_SYS_I2C_UCODE_PATCH
iip = (iic_t *)&cp->cp_dpmem[iip->iic_rpbase];
#endif
state->rx_idx = 0;
state->tx_idx = 0;
- state->rxbd = (void*)&cp->cp_dpmem[iip->iic_rbase];
- state->txbd = (void*)&cp->cp_dpmem[iip->iic_tbase];
+ state->rxbd = (void *)&cp->cp_dpmem[iip->iic_rbase];
+ state->txbd = (void *)&cp->cp_dpmem[iip->iic_tbase];
state->tx_space = MAX_TX_SPACE;
- state->tx_buf = (uchar*)state->txbd + NUM_TX_BDS * sizeof(I2C_BD);
+ state->tx_buf = (uchar *)state->txbd + NUM_TX_BDS * sizeof(I2C_BD);
state->err_cb = NULL;
- PRINTD(("[I2C] rxbd = %08x\n", (int)state->rxbd));
- PRINTD(("[I2C] txbd = %08x\n", (int)state->txbd));
- PRINTD(("[I2C] tx_buf = %08x\n", (int)state->tx_buf));
+ debug("[I2C] rxbd = %08x\n", (int)state->rxbd);
+ debug("[I2C] txbd = %08x\n", (int)state->txbd);
+ debug("[I2C] tx_buf = %08x\n", (int)state->tx_buf);
/* clear the buffer memory */
memset((char *)state->tx_buf, 0, MAX_TX_SPACE);
@@ -334,69 +325,71 @@ static int
i2c_send(i2c_state_t *state,
unsigned char address,
unsigned char secondary_address,
- unsigned int flags,
- unsigned short size,
- unsigned char *dataout)
+ unsigned int flags, unsigned short size, unsigned char *dataout)
{
volatile I2C_BD *txbd;
- int i,j;
+ int i, j;
- PRINTD(("[I2C] i2c_send add=%02d sec=%02d flag=%02d size=%d\n",
- address, secondary_address, flags, size));
+ debug("[I2C] i2c_send add=%02d sec=%02d flag=%02d size=%d\n",
+ address, secondary_address, flags, size);
/* trying to send message larger than BD */
if (size > I2C_RXTX_LEN)
- return I2CERR_MSG_TOO_LONG;
+ return I2CERR_MSG_TOO_LONG;
/* no more free bds */
if (state->tx_idx >= NUM_TX_BDS || state->tx_space < (2 + size))
- return I2CERR_NO_BUFFERS;
+ return I2CERR_NO_BUFFERS;
- txbd = (I2C_BD *)state->txbd;
+ txbd = (I2C_BD *) state->txbd;
txbd->addr = state->tx_buf;
- PRINTD(("[I2C] txbd = %08x\n", (int)txbd));
+ debug("[I2C] txbd = %08x\n", (int)txbd);
if (flags & I2CF_START_COND) {
- PRINTD(("[I2C] Formatting addresses...\n"));
+ debug("[I2C] Formatting addresses...\n");
if (flags & I2CF_ENABLE_SECONDARY) {
- txbd->length = size + 2; /* Length of msg + dest addr */
+ /* Length of msg + dest addr */
+ txbd->length = size + 2;
+
txbd->addr[0] = address << 1;
txbd->addr[1] = secondary_address;
i = 2;
} else {
- txbd->length = size + 1; /* Length of msg + dest addr */
- txbd->addr[0] = address << 1; /* Write dest addr to BD */
+ /* Length of msg + dest addr */
+ txbd->length = size + 1;
+ /* Write dest addr to BD */
+ txbd->addr[0] = address << 1;
i = 1;
}
} else {
- txbd->length = size; /* Length of message */
+ txbd->length = size; /* Length of message */
i = 0;
}
/* set up txbd */
txbd->status = BD_SC_READY;
if (flags & I2CF_START_COND)
- txbd->status |= BD_I2C_TX_START;
+ txbd->status |= BD_I2C_TX_START;
if (flags & I2CF_STOP_COND)
- txbd->status |= BD_SC_LAST | BD_SC_WRAP;
+ txbd->status |= BD_SC_LAST | BD_SC_WRAP;
/* Copy data to send into buffer */
- PRINTD(("[I2C] copy data...\n"));
+ debug("[I2C] copy data...\n");
for(j = 0; j < size; i++, j++)
- txbd->addr[i] = dataout[j];
+ txbd->addr[i] = dataout[j];
- PRINTD(("[I2C] txbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
- txbd->length,
- txbd->status,
- txbd->addr[0],
- txbd->addr[1]));
+ debug("[I2C] txbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
+ txbd->length,
+ txbd->status,
+ txbd->addr[0],
+ txbd->addr[1]);
/* advance state */
state->tx_buf += txbd->length;
state->tx_space -= txbd->length;
state->tx_idx++;
- state->txbd = (void*)(txbd + 1);
+ state->txbd = (void *) (txbd + 1);
return 0;
}
@@ -406,35 +399,35 @@ i2c_receive(i2c_state_t *state,
unsigned char address,
unsigned char secondary_address,
unsigned int flags,
- unsigned short size_to_expect,
- unsigned char *datain)
+ unsigned short size_to_expect, unsigned char *datain)
{
volatile I2C_BD *rxbd, *txbd;
- PRINTD(("[I2C] i2c_receive %02d %02d %02d\n", address, secondary_address, flags));
+ debug("[I2C] i2c_receive %02d %02d %02d\n",
+ address, secondary_address, flags);
/* Expected to receive too much */
if (size_to_expect > I2C_RXTX_LEN)
- return I2CERR_MSG_TOO_LONG;
+ return I2CERR_MSG_TOO_LONG;
/* no more free bds */
if (state->tx_idx >= NUM_TX_BDS || state->rx_idx >= NUM_RX_BDS
- || state->tx_space < 2)
- return I2CERR_NO_BUFFERS;
+ || state->tx_space < 2)
+ return I2CERR_NO_BUFFERS;
- rxbd = (I2C_BD *)state->rxbd;
- txbd = (I2C_BD *)state->txbd;
+ rxbd = (I2C_BD *) state->rxbd;
+ txbd = (I2C_BD *) state->txbd;
- PRINTD(("[I2C] rxbd = %08x\n", (int)rxbd));
- PRINTD(("[I2C] txbd = %08x\n", (int)txbd));
+ debug("[I2C] rxbd = %08x\n", (int)rxbd);
+ debug("[I2C] txbd = %08x\n", (int)txbd);
txbd->addr = state->tx_buf;
/* set up TXBD for destination address */
if (flags & I2CF_ENABLE_SECONDARY) {
txbd->length = 2;
- txbd->addr[0] = address << 1; /* Write data */
- txbd->addr[1] = secondary_address; /* Internal address */
+ txbd->addr[0] = address << 1; /* Write data */
+ txbd->addr[1] = secondary_address; /* Internal address */
txbd->status = BD_SC_READY;
} else {
txbd->length = 1 + size_to_expect;
@@ -454,24 +447,24 @@ i2c_receive(i2c_state_t *state,
rxbd->status |= BD_SC_WRAP;
}
- PRINTD(("[I2C] txbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
- txbd->length,
- txbd->status,
- txbd->addr[0],
- txbd->addr[1]));
- PRINTD(("[I2C] rxbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
- rxbd->length,
- rxbd->status,
- rxbd->addr[0],
- rxbd->addr[1]));
+ debug("[I2C] txbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
+ txbd->length,
+ txbd->status,
+ txbd->addr[0],
+ txbd->addr[1]);
+ debug("[I2C] rxbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
+ rxbd->length,
+ rxbd->status,
+ rxbd->addr[0],
+ rxbd->addr[1]);
/* advance state */
state->tx_buf += txbd->length;
state->tx_space -= txbd->length;
state->tx_idx++;
- state->txbd = (void*)(txbd + 1);
+ state->txbd = (void *) (txbd + 1);
state->rx_idx++;
- state->rxbd = (void*)(rxbd + 1);
+ state->rxbd = (void *) (rxbd + 1);
return 0;
}
@@ -479,21 +472,21 @@ i2c_receive(i2c_state_t *state,
static int i2c_doio(i2c_state_t *state)
{
- volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
+ volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
volatile cpm8xx_t *cp = (cpm8xx_t *)&immap->im_cpm;
- volatile i2c8xx_t *i2c = (i2c8xx_t *)&immap->im_i2c;
+ volatile i2c8xx_t *i2c = (i2c8xx_t *)&immap->im_i2c;
volatile iic_t *iip = (iic_t *)&cp->cp_dparam[PROFF_IIC];
volatile I2C_BD *txbd, *rxbd;
volatile int j = 0;
- PRINTD(("[I2C] i2c_doio\n"));
+ debug("[I2C] i2c_doio\n");
#ifdef CONFIG_SYS_I2C_UCODE_PATCH
iip = (iic_t *)&cp->cp_dpmem[iip->iic_rpbase];
#endif
if (state->tx_idx <= 0 && state->rx_idx <= 0) {
- PRINTD(("[I2C] No I/O is queued\n"));
+ debug("[I2C] No I/O is queued\n");
return I2CERR_QUEUE_EMPTY;
}
@@ -501,7 +494,7 @@ static int i2c_doio(i2c_state_t *state)
iip->iic_tbptr = iip->iic_tbase;
/* Enable I2C */
- PRINTD(("[I2C] Enabling I2C...\n"));
+ debug("[I2C] Enabling I2C...\n");
i2c->i2c_i2mod |= 0x01;
/* Begin transmission */
@@ -511,23 +504,29 @@ static int i2c_doio(i2c_state_t *state)
if (state->tx_idx > 0) {
txbd = ((I2C_BD*)state->txbd) - 1;
- PRINTD(("[I2C] Transmitting...(txbd=0x%08lx)\n", (ulong)txbd));
- while((txbd->status & BD_SC_READY) && (j++ < TOUT_LOOP)) {
- if (ctrlc()) {
+
+ debug("[I2C] Transmitting...(txbd=0x%08lx)\n",
+ (ulong)txbd);
+
+ while ((txbd->status & BD_SC_READY) && (j++ < TOUT_LOOP)) {
+ if (ctrlc())
return (-1);
- }
- __asm__ __volatile__ ("eieio");
+
+ __asm__ __volatile__("eieio");
}
}
if ((state->rx_idx > 0) && (j < TOUT_LOOP)) {
rxbd = ((I2C_BD*)state->rxbd) - 1;
- PRINTD(("[I2C] Receiving...(rxbd=0x%08lx)\n", (ulong)rxbd));
- while((rxbd->status & BD_SC_EMPTY) && (j++ < TOUT_LOOP)) {
- if (ctrlc()) {
+
+ debug("[I2C] Receiving...(rxbd=0x%08lx)\n",
+ (ulong)rxbd);
+
+ while ((rxbd->status & BD_SC_EMPTY) && (j++ < TOUT_LOOP)) {
+ if (ctrlc())
return (-1);
- }
- __asm__ __volatile__ ("eieio");
+
+ __asm__ __volatile__("eieio");
}
}
@@ -544,22 +543,24 @@ static int i2c_doio(i2c_state_t *state)
if ((n = state->tx_idx) > 0) {
for (i = 0; i < n; i++) {
- txbd = ((I2C_BD*)state->txbd) - (n - i);
+ txbd = ((I2C_BD *) state->txbd) - (n - i);
if ((b = txbd->status & BD_I2C_TX_ERR) != 0)
- (*state->err_cb)(I2CECB_TX_ERR|b, i);
+ (*state->err_cb) (I2CECB_TX_ERR | b,
+ i);
}
}
if ((n = state->rx_idx) > 0) {
for (i = 0; i < n; i++) {
- rxbd = ((I2C_BD*)state->rxbd) - (n - i);
+ rxbd = ((I2C_BD *) state->rxbd) - (n - i);
if ((b = rxbd->status & BD_I2C_RX_ERR) != 0)
- (*state->err_cb)(I2CECB_RX_ERR|b, i);
+ (*state->err_cb) (I2CECB_RX_ERR | b,
+ i);
}
}
if (j >= TOUT_LOOP)
- (*state->err_cb)(I2CECB_TIMEOUT, 0);
+ (*state->err_cb) (I2CECB_TIMEOUT, 0);
}
return (j >= TOUT_LOOP) ? I2CERR_TIMEOUT : 0;
@@ -567,8 +568,7 @@ static int i2c_doio(i2c_state_t *state)
static int had_tx_nak;
-static void
-i2c_test_callback(int flags, int xnum)
+static void i2c_test_callback(int flags, int xnum)
{
if ((flags & I2CECB_TX_ERR) && (flags & I2CECB_TX_NAK))
had_tx_nak = 1;
@@ -587,7 +587,8 @@ int i2c_probe(uchar chip)
state.err_cb = i2c_test_callback;
had_tx_nak = 0;
- rc = i2c_receive(&state, chip, 0, I2CF_START_COND|I2CF_STOP_COND, 1, buf);
+ rc = i2c_receive(&state, chip, 0, I2CF_START_COND | I2CF_STOP_COND, 1,
+ buf);
if (rc != 0)
return (rc);
@@ -612,8 +613,8 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
xaddr[0] = (addr >> 24) & 0xFF;
xaddr[1] = (addr >> 16) & 0xFF;
- xaddr[2] = (addr >> 8) & 0xFF;
- xaddr[3] = addr & 0xFF;
+ xaddr[2] = (addr >> 8) & 0xFF;
+ xaddr[3] = addr & 0xFF;
#ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW
/*
@@ -626,12 +627,13 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
* be one byte because the extra address bits are hidden in the
* chip address.
*/
- chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
+ chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
#endif
i2c_newio(&state);
- rc = i2c_send(&state, chip, 0, I2CF_START_COND, alen, &xaddr[4-alen]);
+ rc = i2c_send(&state, chip, 0, I2CF_START_COND, alen,
+ &xaddr[4 - alen]);
if (rc != 0) {
printf("i2c_read: i2c_send failed (%d)\n", rc);
return 1;
@@ -659,8 +661,8 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
xaddr[0] = (addr >> 24) & 0xFF;
xaddr[1] = (addr >> 16) & 0xFF;
- xaddr[2] = (addr >> 8) & 0xFF;
- xaddr[3] = addr & 0xFF;
+ xaddr[2] = (addr >> 8) & 0xFF;
+ xaddr[3] = addr & 0xFF;
#ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW
/*
@@ -673,12 +675,13 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
* be one byte because the extra address bits are hidden in the
* chip address.
*/
- chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
+ chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
#endif
i2c_newio(&state);
- rc = i2c_send(&state, chip, 0, I2CF_START_COND, alen, &xaddr[4-alen]);
+ rc = i2c_send(&state, chip, 0, I2CF_START_COND, alen,
+ &xaddr[4 - alen]);
if (rc != 0) {
printf("i2c_write: first i2c_send failed (%d)\n", rc);
return 1;
@@ -698,4 +701,4 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
return 0;
}
-#endif /* CONFIG_HARD_I2C */
+#endif /* CONFIG_HARD_I2C */
generated by cgit v1.1 at 2024-09-12 09:31:46 +0000