Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-09-25 08:52:09 +00:00
Code Issues Projects Releases Packages Wiki Activity

mpc8xx/i2c.c: CodungStyle cleanup

Browse source 
Make (mostly) checkpatch-clean

We don't acctually change the code (like convert to use I/O
accessors), so there will be some remaining "Use of volatile"
warnings from checkpatch.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Heiko Schocher <hs@denx.de>
This commit is contained in:
Wolfgang Denk 2011-11-04 15:55:36 +00:00
parent e1196b8005
commit 09e68ffadd
1 changed files with 154 additions and 149 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

303
arch/powerpc/cpu/mpc8xx/i2c.c
View file

@ -50,13 +50,13 @@ DECLARE_GLOBAL_DATA_PTR;
#define MAX_TX_SPACE 256 #define MAX_TX_SPACE 256
#define I2C_RXTX_LEN 128 /* maximum tx/rx buffer length */ #define I2C_RXTX_LEN 128 /* maximum tx/rx buffer length */
typedef struct I2C_BD typedef struct I2C_BD {
{ unsigned short status;
unsigned short status; unsigned short length;
unsigned short length; unsigned char *addr;
unsigned char *addr;
} I2C_BD; } 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_CL 0x0001 /* collision error */
#define BD_I2C_TX_UN 0x0002 /* underflow error */ #define BD_I2C_TX_UN 0x0002 /* underflow error */
@ -65,41 +65,41 @@ typedef struct I2C_BD
#define BD_I2C_RX_ERR BD_SC_OV #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. */ /* This structure keeps track of the bd and buffer space usage. */
typedef struct i2c_state { typedef struct i2c_state {
int rx_idx; /* index to next free Rx BD */ int rx_idx; /* index to next free Rx BD */
int tx_idx; /* index to next free Tx BD */ int tx_idx; /* index to next free Tx BD */
void *rxbd; /* pointer to next free Rx BD */ void *rxbd; /* pointer to next free Rx BD */
void *txbd; /* pointer to next free Tx BD */ void *txbd; /* pointer to next free Tx BD */
int tx_space; /* number of Tx bytes left */ int tx_space; /* number of Tx bytes left */
unsigned char *tx_buf; /* pointer to free Tx area */ unsigned char *tx_buf; /* pointer to free Tx area */
i2c_ecb_t err_cb; /* error callback function */ i2c_ecb_t err_cb; /* error callback function */
} i2c_state_t; } i2c_state_t;
/* flags for i2c_send() and i2c_receive() */ /* flags for i2c_send() and i2c_receive() */
#define I2CF_ENABLE_SECONDARY 0x01 /* secondary_address is valid */ #define I2CF_ENABLE_SECONDARY 0x01 /* secondary_address is valid */
#define I2CF_START_COND 0x02 /* tx: generate start condition */ #define I2CF_START_COND 0x02 /* tx: generate start condition */
#define I2CF_STOP_COND 0x04 /* tx: generate stop condition */ #define I2CF_STOP_COND 0x04 /* tx: generate stop condition */
/* return codes */ /* return codes */
#define I2CERR_NO_BUFFERS 0x01 /* no more BDs or buffer space */ #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_MSG_TOO_LONG 0x02 /* tried to send/receive to much data */
#define I2CERR_TIMEOUT 0x03 /* timeout in i2c_doio() */ #define I2CERR_TIMEOUT 0x03 /* timeout in i2c_doio() */
#define I2CERR_QUEUE_EMPTY 0x04 /* i2c_doio called without send/receive */ #define I2CERR_QUEUE_EMPTY 0x04 /* i2c_doio called without send/receive */
/* error callback flags */ /* error callback flags */
#define I2CECB_RX_ERR 0x10 /* this is a receive error */ #define I2CECB_RX_ERR 0x10 /* this is a receive error */
#define I2CECB_RX_ERR_OV 0x02 /* receive overrun error */ #define I2CECB_RX_ERR_OV 0x02 /* receive overrun error */
#define I2CECB_RX_MASK 0x0f /* mask for error bits */ #define I2CECB_RX_MASK 0x0f /* mask for error bits */
#define I2CECB_TX_ERR 0x20 /* this is a transmit error */ #define I2CECB_TX_ERR 0x20 /* this is a transmit error */
#define I2CECB_TX_CL 0x01 /* transmit collision error */ #define I2CECB_TX_CL 0x01 /* transmit collision error */
#define I2CECB_TX_UN 0x02 /* transmit underflow error */ #define I2CECB_TX_UN 0x02 /* transmit underflow error */
#define I2CECB_TX_NAK 0x04 /* transmit no ack error */ #define I2CECB_TX_NAK 0x04 /* transmit no ack error */
#define I2CECB_TX_MASK 0x0f /* mask for error bits */ #define I2CECB_TX_MASK 0x0f /* mask for error bits */
#define I2CECB_TIMEOUT 0x40 /* this is a timeout error */ #define I2CECB_TIMEOUT 0x40 /* this is a timeout error */
#ifdef DEBUG_I2C #ifdef DEBUG_I2C
#define PRINTD(x) printf x #define PRINTD(x) printf x
@ -115,53 +115,53 @@ typedef struct i2c_state {
*/ */
static inline int static inline int
i2c_roundrate(int hz, int speed, int filter, int modval, 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", PRINTD(("\t[I2C] trying hz=%d, speed=%d, filter=%d, modval=%d\n",
hz, speed, filter, modval)); hz, speed, filter, modval));
div = moddiv * speed; div = moddiv * speed;
brgdiv = (hz + div - 1) / div; brgdiv = (hz + div - 1) / div;
PRINTD(("\t\tmoddiv=%d, brgdiv=%d\n", moddiv, brgdiv)); PRINTD(("\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)) { if ((*brgval < 0) || (*brgval > 255)) {
PRINTD(("\t\trejected brgval=%d\n", *brgval)); PRINTD(("\t\trejected brgval=%d\n", *brgval));
return -1; return -1;
} }
brgdiv = 2 * (*brgval + 3 + (2 * filter)); brgdiv = 2 * (*brgval + 3 + (2 * filter));
div = moddiv * brgdiv ; div = moddiv * brgdiv;
*totspeed = hz / div; *totspeed = hz / div;
PRINTD(("\t\taccepted brgval=%d, totspeed=%d\n", *brgval, *totspeed)); PRINTD(("\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. * Sets the I2C clock predivider and divider to meet required clock speed.
*/ */
static int static int i2c_setrate(int hz, int speed)
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; volatile i2c8xx_t *i2c = (i2c8xx_t *) & immap->im_i2c;
int brgval, int brgval,
modval, /* 0-3 */ modval, /* 0-3 */
bestspeed_diff = speed, bestspeed_diff = speed,
bestspeed_brgval = 0, bestspeed_brgval = 0,
bestspeed_modval = 0, bestspeed_modval = 0,
bestspeed_filter = 0, bestspeed_filter = 0,
totspeed, totspeed,
filter = 0; /* Use this fixed value */ filter = 0; /* Use this fixed value */
for (modval = 0; modval < 4; modval++) { 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; int diff = speed - totspeed;
if ((diff >= 0) && (diff < bestspeed_diff)) { if ((diff >= 0) && (diff < bestspeed_diff)) {
@ -182,21 +182,21 @@ i2c_setrate (int hz, int speed)
bestspeed_brgval, 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; i2c->i2c_i2brg = bestspeed_brgval & 0xff;
PRINTD (("[I2C] i2mod=%08x i2brg=%08x\n", i2c->i2c_i2mod, PRINTD (("[I2C] i2mod=%08x i2brg=%08x\n", i2c->i2c_i2mod,
i2c->i2c_i2brg)); i2c->i2c_i2brg));
return 1; return 1;
} }
void void i2c_init(int speed, int slaveaddr)
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 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 iic_t *iip = (iic_t *)&cp->cp_dparam[PROFF_IIC];
ulong rbase, tbase; ulong rbase, tbase;
volatile I2C_BD *rxbd, *txbd; volatile I2C_BD *rxbd, *txbd;
@ -219,10 +219,10 @@ i2c_init(int speed, int slaveaddr)
#ifdef CONFIG_SYS_ALLOC_DPRAM #ifdef CONFIG_SYS_ALLOC_DPRAM
dpaddr = iip->iic_rbase; dpaddr = iip->iic_rbase;
if (dpaddr == 0) { if (dpaddr == 0) {
/* need to allocate dual port ram */ /* need to allocate dual port ram */
dpaddr = dpram_alloc_align( dpaddr = dpram_alloc_align((NUM_RX_BDS * sizeof(I2C_BD)) +
(NUM_RX_BDS * sizeof(I2C_BD)) + (NUM_TX_BDS * sizeof(I2C_BD)) + (NUM_TX_BDS * sizeof(I2C_BD)) +
MAX_TX_SPACE, 8); MAX_TX_SPACE, 8);
} }
#else #else
dpaddr = CPM_I2C_BASE; dpaddr = CPM_I2C_BASE;
@ -256,19 +256,19 @@ i2c_init(int speed, int slaveaddr)
* divide BRGCLK by 1) * divide BRGCLK by 1)
*/ */
PRINTD(("[I2C] Setting rate...\n")); PRINTD(("[I2C] Setting rate...\n"));
i2c_setrate (gd->cpu_clk, CONFIG_SYS_I2C_SPEED) ; i2c_setrate(gd->cpu_clk, CONFIG_SYS_I2C_SPEED);
/* Set I2C controller in master mode */ /* Set I2C controller in master mode */
i2c->i2c_i2com = 0x01; i2c->i2c_i2com = 0x01;
/* Set SDMA bus arbitration level to 5 (SDCR) */ /* 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 */ /* Initialize Tx/Rx parameters */
iip->iic_rbase = rbase; iip->iic_rbase = rbase;
iip->iic_tbase = tbase; iip->iic_tbase = tbase;
rxbd = (I2C_BD *)((unsigned char *)&cp->cp_dpmem[iip->iic_rbase]); rxbd = (I2C_BD *) ((unsigned char *) &cp->cp_dpmem[iip->iic_rbase]);
txbd = (I2C_BD *)((unsigned char *)&cp->cp_dpmem[iip->iic_tbase]); txbd = (I2C_BD *) ((unsigned char *) &cp->cp_dpmem[iip->iic_tbase]);
PRINTD(("[I2C] rbase = %04x\n", iip->iic_rbase)); PRINTD(("[I2C] rbase = %04x\n", iip->iic_rbase));
PRINTD(("[I2C] tbase = %04x\n", iip->iic_tbase)); PRINTD(("[I2C] tbase = %04x\n", iip->iic_tbase));
@ -286,14 +286,14 @@ i2c_init(int speed, int slaveaddr)
/* /*
* Initialize required parameters if using microcode patch. * Initialize required parameters if using microcode patch.
*/ */
iip->iic_rbptr = iip->iic_rbase; iip->iic_rbptr = iip->iic_rbase;
iip->iic_tbptr = iip->iic_tbase; iip->iic_tbptr = iip->iic_tbase;
iip->iic_rstate = 0; iip->iic_rstate = 0;
iip->iic_tstate = 0; iip->iic_tstate = 0;
#else #else
cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_I2C, CPM_CR_INIT_TRX) | CPM_CR_FLG; cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_I2C, CPM_CR_INIT_TRX) | CPM_CR_FLG;
do { do {
__asm__ __volatile__ ("eieio"); __asm__ __volatile__("eieio");
} while (cp->cp_cpcr & CPM_CR_FLG); } while (cp->cp_cpcr & CPM_CR_FLG);
#endif #endif
@ -302,10 +302,9 @@ i2c_init(int speed, int slaveaddr)
i2c->i2c_i2cmr = 0x00; i2c->i2c_i2cmr = 0x00;
} }
static void static void i2c_newio(i2c_state_t *state)
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 cpm8xx_t *cp = (cpm8xx_t *)&immap->im_cpm;
volatile iic_t *iip = (iic_t *)&cp->cp_dparam[PROFF_IIC]; volatile iic_t *iip = (iic_t *)&cp->cp_dparam[PROFF_IIC];
@ -316,10 +315,10 @@ i2c_newio(i2c_state_t *state)
#endif #endif
state->rx_idx = 0; state->rx_idx = 0;
state->tx_idx = 0; state->tx_idx = 0;
state->rxbd = (void*)&cp->cp_dpmem[iip->iic_rbase]; state->rxbd = (void *)&cp->cp_dpmem[iip->iic_rbase];
state->txbd = (void*)&cp->cp_dpmem[iip->iic_tbase]; state->txbd = (void *)&cp->cp_dpmem[iip->iic_tbase];
state->tx_space = MAX_TX_SPACE; 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; state->err_cb = NULL;
PRINTD(("[I2C] rxbd = %08x\n", (int)state->rxbd)); PRINTD(("[I2C] rxbd = %08x\n", (int)state->rxbd));
@ -334,25 +333,23 @@ static int
i2c_send(i2c_state_t *state, i2c_send(i2c_state_t *state,
unsigned char address, unsigned char address,
unsigned char secondary_address, unsigned char secondary_address,
unsigned int flags, unsigned int flags, unsigned short size, unsigned char *dataout)
unsigned short size,
unsigned char *dataout)
{ {
volatile I2C_BD *txbd; volatile I2C_BD *txbd;
int i,j; int i, j;
PRINTD(("[I2C] i2c_send add=%02d sec=%02d flag=%02d size=%d\n", PRINTD(("[I2C] i2c_send add=%02d sec=%02d flag=%02d size=%d\n",
address, secondary_address, flags, size)); address, secondary_address, flags, size));
/* trying to send message larger than BD */ /* trying to send message larger than BD */
if (size > I2C_RXTX_LEN) if (size > I2C_RXTX_LEN)
return I2CERR_MSG_TOO_LONG; return I2CERR_MSG_TOO_LONG;
/* no more free bds */ /* no more free bds */
if (state->tx_idx >= NUM_TX_BDS || state->tx_space < (2 + size)) 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; txbd->addr = state->tx_buf;
PRINTD(("[I2C] txbd = %08x\n", (int)txbd)); PRINTD(("[I2C] txbd = %08x\n", (int)txbd));
@ -360,43 +357,47 @@ i2c_send(i2c_state_t *state,
if (flags & I2CF_START_COND) { if (flags & I2CF_START_COND) {
PRINTD(("[I2C] Formatting addresses...\n")); PRINTD(("[I2C] Formatting addresses...\n"));
if (flags & I2CF_ENABLE_SECONDARY) { 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[0] = address << 1;
txbd->addr[1] = secondary_address; txbd->addr[1] = secondary_address;
i = 2; i = 2;
} else { } else {
txbd->length = size + 1; /* Length of msg + dest addr */ /* Length of msg + dest addr */
txbd->addr[0] = address << 1; /* Write dest addr to BD */ txbd->length = size + 1;
/* Write dest addr to BD */
txbd->addr[0] = address << 1;
i = 1; i = 1;
} }
} else { } else {
txbd->length = size; /* Length of message */ txbd->length = size; /* Length of message */
i = 0; i = 0;
} }
/* set up txbd */ /* set up txbd */
txbd->status = BD_SC_READY; txbd->status = BD_SC_READY;
if (flags & I2CF_START_COND) if (flags & I2CF_START_COND)
txbd->status |= BD_I2C_TX_START; txbd->status |= BD_I2C_TX_START;
if (flags & I2CF_STOP_COND) 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 */ /* Copy data to send into buffer */
PRINTD(("[I2C] copy data...\n")); PRINTD(("[I2C] copy data...\n"));
for(j = 0; j < size; i++, j++) 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", PRINTD(("[I2C] txbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
txbd->length, txbd->length,
txbd->status, txbd->status,
txbd->addr[0], txbd->addr[0],
txbd->addr[1])); txbd->addr[1]));
/* advance state */ /* advance state */
state->tx_buf += txbd->length; state->tx_buf += txbd->length;
state->tx_space -= txbd->length; state->tx_space -= txbd->length;
state->tx_idx++; state->tx_idx++;
state->txbd = (void*)(txbd + 1); state->txbd = (void *) (txbd + 1);
return 0; return 0;
} }
@ -406,24 +407,24 @@ i2c_receive(i2c_state_t *state,
unsigned char address, unsigned char address,
unsigned char secondary_address, unsigned char secondary_address,
unsigned int flags, unsigned int flags,
unsigned short size_to_expect, unsigned short size_to_expect, unsigned char *datain)
unsigned char *datain)
{ {
volatile I2C_BD *rxbd, *txbd; volatile I2C_BD *rxbd, *txbd;
PRINTD(("[I2C] i2c_receive %02d %02d %02d\n", address, secondary_address, flags)); PRINTD(("[I2C] i2c_receive %02d %02d %02d\n",
address, secondary_address, flags));
/* Expected to receive too much */ /* Expected to receive too much */
if (size_to_expect > I2C_RXTX_LEN) if (size_to_expect > I2C_RXTX_LEN)
return I2CERR_MSG_TOO_LONG; return I2CERR_MSG_TOO_LONG;
/* no more free bds */ /* no more free bds */
if (state->tx_idx >= NUM_TX_BDS || state->rx_idx >= NUM_RX_BDS if (state->tx_idx >= NUM_TX_BDS || state->rx_idx >= NUM_RX_BDS
|| state->tx_space < 2) || state->tx_space < 2)
return I2CERR_NO_BUFFERS; return I2CERR_NO_BUFFERS;
rxbd = (I2C_BD *)state->rxbd; rxbd = (I2C_BD *) state->rxbd;
txbd = (I2C_BD *)state->txbd; txbd = (I2C_BD *) state->txbd;
PRINTD(("[I2C] rxbd = %08x\n", (int)rxbd)); PRINTD(("[I2C] rxbd = %08x\n", (int)rxbd));
PRINTD(("[I2C] txbd = %08x\n", (int)txbd)); PRINTD(("[I2C] txbd = %08x\n", (int)txbd));
@ -433,8 +434,8 @@ i2c_receive(i2c_state_t *state,
/* set up TXBD for destination address */ /* set up TXBD for destination address */
if (flags & I2CF_ENABLE_SECONDARY) { if (flags & I2CF_ENABLE_SECONDARY) {
txbd->length = 2; txbd->length = 2;
txbd->addr[0] = address << 1; /* Write data */ txbd->addr[0] = address << 1; /* Write data */
txbd->addr[1] = secondary_address; /* Internal address */ txbd->addr[1] = secondary_address; /* Internal address */
txbd->status = BD_SC_READY; txbd->status = BD_SC_READY;
} else { } else {
txbd->length = 1 + size_to_expect; txbd->length = 1 + size_to_expect;
@ -455,23 +456,23 @@ i2c_receive(i2c_state_t *state,
} }
PRINTD(("[I2C] txbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n", PRINTD(("[I2C] txbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
txbd->length, txbd->length,
txbd->status, txbd->status,
txbd->addr[0], txbd->addr[0],
txbd->addr[1])); txbd->addr[1]));
PRINTD(("[I2C] rxbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n", PRINTD(("[I2C] rxbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
rxbd->length, rxbd->length,
rxbd->status, rxbd->status,
rxbd->addr[0], rxbd->addr[0],
rxbd->addr[1])); rxbd->addr[1]));
/* advance state */ /* advance state */
state->tx_buf += txbd->length; state->tx_buf += txbd->length;
state->tx_space -= txbd->length; state->tx_space -= txbd->length;
state->tx_idx++; state->tx_idx++;
state->txbd = (void*)(txbd + 1); state->txbd = (void *) (txbd + 1);
state->rx_idx++; state->rx_idx++;
state->rxbd = (void*)(rxbd + 1); state->rxbd = (void *) (rxbd + 1);
return 0; return 0;
} }
@ -479,9 +480,9 @@ i2c_receive(i2c_state_t *state,
static int i2c_doio(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 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 iic_t *iip = (iic_t *)&cp->cp_dparam[PROFF_IIC];
volatile I2C_BD *txbd, *rxbd; volatile I2C_BD *txbd, *rxbd;
volatile int j = 0; volatile int j = 0;
@ -512,22 +513,22 @@ static int i2c_doio(i2c_state_t *state)
if (state->tx_idx > 0) { if (state->tx_idx > 0) {
txbd = ((I2C_BD*)state->txbd) - 1; txbd = ((I2C_BD*)state->txbd) - 1;
PRINTD(("[I2C] Transmitting...(txbd=0x%08lx)\n", (ulong)txbd)); PRINTD(("[I2C] Transmitting...(txbd=0x%08lx)\n", (ulong)txbd));
while((txbd->status & BD_SC_READY) && (j++ < TOUT_LOOP)) { while ((txbd->status & BD_SC_READY) && (j++ < TOUT_LOOP)) {
if (ctrlc()) { if (ctrlc())
return (-1); return (-1);
}
__asm__ __volatile__ ("eieio"); __asm__ __volatile__("eieio");
} }
} }
if ((state->rx_idx > 0) && (j < TOUT_LOOP)) { if ((state->rx_idx > 0) && (j < TOUT_LOOP)) {
rxbd = ((I2C_BD*)state->rxbd) - 1; rxbd = ((I2C_BD*)state->rxbd) - 1;
PRINTD(("[I2C] Receiving...(rxbd=0x%08lx)\n", (ulong)rxbd)); PRINTD(("[I2C] Receiving...(rxbd=0x%08lx)\n", (ulong)rxbd));
while((rxbd->status & BD_SC_EMPTY) && (j++ < TOUT_LOOP)) { while ((rxbd->status & BD_SC_EMPTY) && (j++ < TOUT_LOOP)) {
if (ctrlc()) { if (ctrlc())
return (-1); return (-1);
}
__asm__ __volatile__ ("eieio"); __asm__ __volatile__("eieio");
} }
} }
@ -544,22 +545,24 @@ static int i2c_doio(i2c_state_t *state)
if ((n = state->tx_idx) > 0) { if ((n = state->tx_idx) > 0) {
for (i = 0; i < n; i++) { 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) 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) { if ((n = state->rx_idx) > 0) {
for (i = 0; i < n; i++) { 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) 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) if (j >= TOUT_LOOP)
(*state->err_cb)(I2CECB_TIMEOUT, 0); (*state->err_cb) (I2CECB_TIMEOUT, 0);
} }
return (j >= TOUT_LOOP) ? I2CERR_TIMEOUT : 0; return (j >= TOUT_LOOP) ? I2CERR_TIMEOUT : 0;
@ -567,8 +570,7 @@ static int i2c_doio(i2c_state_t *state)
static int had_tx_nak; static int had_tx_nak;
static void static void i2c_test_callback(int flags, int xnum)
i2c_test_callback(int flags, int xnum)
{ {
if ((flags & I2CECB_TX_ERR) && (flags & I2CECB_TX_NAK)) if ((flags & I2CECB_TX_ERR) && (flags & I2CECB_TX_NAK))
had_tx_nak = 1; had_tx_nak = 1;
@ -587,7 +589,8 @@ int i2c_probe(uchar chip)
state.err_cb = i2c_test_callback; state.err_cb = i2c_test_callback;
had_tx_nak = 0; 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) if (rc != 0)
return (rc); return (rc);
@ -612,8 +615,8 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
xaddr[0] = (addr >> 24) & 0xFF; xaddr[0] = (addr >> 24) & 0xFF;
xaddr[1] = (addr >> 16) & 0xFF; xaddr[1] = (addr >> 16) & 0xFF;
xaddr[2] = (addr >> 8) & 0xFF; xaddr[2] = (addr >> 8) & 0xFF;
xaddr[3] = addr & 0xFF; xaddr[3] = addr & 0xFF;
#ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW #ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW
/* /*
@ -626,12 +629,13 @@ 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 * be one byte because the extra address bits are hidden in the
* chip address. * chip address.
*/ */
chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW); chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
#endif #endif
i2c_newio(&state); 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) { if (rc != 0) {
printf("i2c_read: i2c_send failed (%d)\n", rc); printf("i2c_read: i2c_send failed (%d)\n", rc);
return 1; return 1;
@ -659,8 +663,8 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
xaddr[0] = (addr >> 24) & 0xFF; xaddr[0] = (addr >> 24) & 0xFF;
xaddr[1] = (addr >> 16) & 0xFF; xaddr[1] = (addr >> 16) & 0xFF;
xaddr[2] = (addr >> 8) & 0xFF; xaddr[2] = (addr >> 8) & 0xFF;
xaddr[3] = addr & 0xFF; xaddr[3] = addr & 0xFF;
#ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW #ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW
/* /*
@ -673,12 +677,13 @@ 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 * be one byte because the extra address bits are hidden in the
* chip address. * chip address.
*/ */
chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW); chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
#endif #endif
i2c_newio(&state); 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) { if (rc != 0) {
printf("i2c_write: first i2c_send failed (%d)\n", rc); printf("i2c_write: first i2c_send failed (%d)\n", rc);
return 1; return 1;
@ -698,4 +703,4 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
return 0; return 0;
} }
#endif /* CONFIG_HARD_I2C */ #endif /* CONFIG_HARD_I2C */