* (C) Copyright 2000 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/cpm_8260.h>
#include <i2c.h>
-/* define to enable debug messages */
-#undef DEBUG_I2C
-
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_I2C_MULTI_BUS)
-static unsigned int i2c_bus_num __attribute__ ((section (".data"))) = 0;
+static unsigned int i2c_bus_num __attribute__ ((section(".data"))) = 0;
#endif /* CONFIG_I2C_MULTI_BUS */
/* uSec to wait between polls of the i2c */
*/
#define TOUT_LOOP 5
-/*-----------------------------------------------------------------------
+/*
* Set default values
*/
#ifndef CONFIG_SYS_I2C_SPEED
#define CONFIG_SYS_I2C_SPEED 50000
#endif
-/*-----------------------------------------------------------------------
- */
-typedef void (*i2c_ecb_t)(int, int, void *); /* error callback function */
+typedef void (*i2c_ecb_t) (int, int, void *); /* 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 */
- void *cb_data; /* private data to be passed */
+ 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 */
+ void *cb_data; /* private data to be passed */
} 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 1 /* no more BDs or buffer space */
-#define I2CERR_MSG_TOO_LONG 2 /* tried to send/receive to much data */
-#define I2CERR_TIMEOUT 3 /* timeout in i2c_doio() */
-#define I2CERR_QUEUE_EMPTY 4 /* i2c_doio called without send/receive */
-#define I2CERR_IO_ERROR 5 /* had an error during comms */
+#define I2CERR_NO_BUFFERS 1 /* no more BDs or buffer space */
+#define I2CERR_MSG_TOO_LONG 2 /* tried to send/receive to much data */
+#define I2CERR_TIMEOUT 3 /* timeout in i2c_doio() */
+#define I2CERR_QUEUE_EMPTY 4 /* i2c_doio called without send/rcv */
+#define I2CERR_IO_ERROR 5 /* had an error during comms */
/* error callback flags */
-#define I2CECB_RX_ERR 0x10 /* this is a receive error */
-#define I2CECB_RX_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 */
+#define I2CECB_RX_ERR 0x10 /* this is a receive error */
+#define I2CECB_RX_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 */
#define ERROR_I2C_NONE 0
#define ERROR_I2C_LENGTH 1
#define NUM_TX_BDS 4
#define MAX_TX_SPACE 256
-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 */
#define BD_I2C_RX_ERR BD_SC_OV
-#ifdef DEBUG_I2C
-#define PRINTD(x) printf x
-#else
-#define PRINTD(x)
-#endif
-
/*
* Returns the best value of I2BRG to meet desired clock speed of I2C with
* input parameters (clock speed, filter, and predivider value).
*/
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;
}
/*
*/
static int i2c_setrate(int hz, int speed)
{
- immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
- volatile i2c8260_t *i2c = (i2c8260_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 */
-
- for (modval = 0; modval < 4; modval++)
- {
- if (i2c_roundrate (hz, speed, filter, modval, &brgval, &totspeed) == 0)
- {
- int diff = speed - totspeed ;
-
- if ((diff >= 0) && (diff < bestspeed_diff))
- {
- bestspeed_diff = diff ;
- bestspeed_modval = modval;
- bestspeed_brgval = brgval;
- bestspeed_filter = filter;
+ immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
+ volatile i2c8260_t *i2c = (i2c8260_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 */
+
+ for (modval = 0; modval < 4; modval++) {
+ if (i2c_roundrate(hz, speed, filter, modval, &brgval, &totspeed)
+ == 0) {
+ int diff = speed - totspeed;
+
+ if ((diff >= 0) && (diff < bestspeed_diff)) {
+ bestspeed_diff = diff;
+ bestspeed_modval = modval;
+ bestspeed_brgval = brgval;
+ bestspeed_filter = filter;
}
}
}
- PRINTD(("[I2C] Best is:\n"));
- PRINTD(("[I2C] CPU=%dhz RATE=%d F=%d I2MOD=%08x I2BRG=%08x DIFF=%dhz\n",
- hz, speed,
- bestspeed_filter, bestspeed_modval, bestspeed_brgval,
- bestspeed_diff));
+ 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);
- i2c->i2c_i2mod |= ((bestspeed_modval & 3) << 1) | (bestspeed_filter << 3);
- i2c->i2c_i2brg = bestspeed_brgval & 0xff;
+ 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 ;
+ return 1;
}
void i2c_init(int speed, int slaveadd)
{
- volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
+ volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
volatile cpm8260_t *cp = (cpm8260_t *)&immap->im_cpm;
- volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
+ volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
volatile iic_t *iip;
ulong rbase, tbase;
volatile I2C_BD *rxbd, *txbd;
uint dpaddr;
#ifdef CONFIG_SYS_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. */
+ /*
+ * 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.
+ */
i2c_init_board();
#endif
- dpaddr = *((unsigned short*)(&immap->im_dprambase[PROFF_I2C_BASE]));
+ dpaddr = immap->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)];
if (dpaddr == 0) {
- /* need to allocate dual port ram */
- dpaddr = m8260_cpm_dpalloc(64 +
- (NUM_RX_BDS * sizeof(I2C_BD)) + (NUM_TX_BDS * sizeof(I2C_BD)) +
- MAX_TX_SPACE, 64);
- *((unsigned short*)(&immap->im_dprambase[PROFF_I2C_BASE])) = dpaddr;
+ /* need to allocate dual port ram */
+ dpaddr = m8260_cpm_dpalloc(64 +
+ (NUM_RX_BDS * sizeof(I2C_BD)) +
+ (NUM_TX_BDS * sizeof(I2C_BD)) +
+ MAX_TX_SPACE, 64);
+ immap->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)] =
+ dpaddr;
}
/*
* 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)
*/
iip = (iic_t *)&immap->im_dprambase[dpaddr];
- memset((void*)iip, 0, sizeof(iic_t));
+ memset((void *)iip, 0, sizeof(iic_t));
rbase = dpaddr + 64;
tbase = rbase + NUM_RX_BDS * sizeof(I2C_BD);
* and current CPU rate (we assume sccr dfbgr field is 0;
* divide BRGCLK by 1)
*/
- PRINTD(("[I2C] Setting rate...\n"));
- i2c_setrate (gd->brg_clk, CONFIG_SYS_I2C_SPEED) ;
+ debug("[I2C] Setting rate...\n");
+ i2c_setrate(gd->arch.brg_clk, CONFIG_SYS_I2C_SPEED);
/* Set I2C controller in master mode */
i2c->i2c_i2com = 0x01;
/* Initialize Tx/Rx parameters */
iip->iic_rbase = rbase;
iip->iic_tbase = tbase;
- rxbd = (I2C_BD *)((unsigned char *)&immap->im_dprambase[iip->iic_rbase]);
- txbd = (I2C_BD *)((unsigned char *)&immap->im_dprambase[iip->iic_tbase]);
+ rxbd = (I2C_BD *)((unsigned char *) &immap->
+ im_dprambase[iip->iic_rbase]);
+ txbd = (I2C_BD *)((unsigned char *) &immap->
+ im_dprambase[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;
/* Set maximum receive size. */
iip->iic_mrblr = I2C_RXTX_LEN;
- cp->cp_cpcr = mk_cr_cmd(CPM_CR_I2C_PAGE,
- CPM_CR_I2C_SBLOCK,
- 0x00,
- CPM_CR_INIT_TRX) | CPM_CR_FLG;
- do {
- __asm__ __volatile__ ("eieio");
- } while (cp->cp_cpcr & CPM_CR_FLG);
+ cp->cp_cpcr = mk_cr_cmd(CPM_CR_I2C_PAGE,
+ CPM_CR_I2C_SBLOCK,
+ 0x00, CPM_CR_INIT_TRX) | CPM_CR_FLG;
+ do {
+ __asm__ __volatile__("eieio");
+ } while (cp->cp_cpcr & CPM_CR_FLG);
/* Clear events and interrupts */
i2c->i2c_i2cer = 0xff;
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 iic_t *iip;
uint dpaddr;
- PRINTD(("[I2C] i2c_newio\n"));
+ debug("[I2C] i2c_newio\n");
- dpaddr = *((unsigned short*)(&immap->im_dprambase[PROFF_I2C_BASE]));
+ dpaddr = immap->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)];
iip = (iic_t *)&immap->im_dprambase[dpaddr];
state->rx_idx = 0;
state->tx_idx = 0;
- state->rxbd = (void*)&immap->im_dprambase[iip->iic_rbase];
- state->txbd = (void*)&immap->im_dprambase[iip->iic_tbase];
+ state->rxbd = (void *)&immap->im_dprambase[iip->iic_rbase];
+ state->txbd = (void *)&immap->im_dprambase[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;
state->cb_data = 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);
+ memset((char *) state->tx_buf, 0, MAX_TX_SPACE);
}
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 char address,
+ unsigned char secondary_address,
+ 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->addr = state->tx_buf;
- PRINTD(("[I2C] txbd = %08x\n", (int)txbd));
-
- if (flags & I2CF_START_COND)
- {
- PRINTD(("[I2C] Formatting addresses...\n"));
- if (flags & I2CF_ENABLE_SECONDARY)
- {
- txbd->length = size + 2; /* Length of message plus dest addresses */
- txbd->addr[0] = address << 1;
- txbd->addr[1] = secondary_address;
- i = 2;
- }
- else
- {
- txbd->length = size + 1; /* Length of message plus dest address */
- txbd->addr[0] = address << 1; /* Write destination address to BD */
- i = 1;
+ debug("[I2C] txbd = %08x\n", (int) txbd);
+
+ if (flags & I2CF_START_COND) {
+ debug("[I2C] Formatting addresses...\n");
+ if (flags & I2CF_ENABLE_SECONDARY) {
+ /* Length of message plus dest addresses */
+ txbd->length = size + 2;
+ txbd->addr[0] = address << 1;
+ txbd->addr[1] = secondary_address;
+ i = 2;
+ } else {
+ /* Length of message plus dest address */
+ txbd->length = size + 1;
+ /* Write destination address to BD */
+ txbd->addr[0] = address << 1;
+ i = 1;
+ }
+ } else {
+ txbd->length = size; /* Length of message */
+ i = 0;
}
- }
- else
- {
- 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"));
- for(j = 0; j < size; i++, j++)
- txbd->addr[i] = dataout[j];
+ debug("[I2C] copy data...\n");
+ for (j = 0; j < size; i++, 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;
}
static
int 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 char address,
+ unsigned char secondary_address,
+ unsigned int flags,
+ 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)
- {
+ 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
- {
+ } else {
txbd->length = 1 + size_to_expect;
txbd->addr[0] = (address << 1) | 0x01;
txbd->status = BD_SC_READY;
rxbd->addr = datain;
txbd->status |= BD_I2C_TX_START;
- if (flags & I2CF_STOP_COND)
- {
+ if (flags & I2CF_STOP_COND) {
txbd->status |= BD_SC_LAST | BD_SC_WRAP;
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;
}
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 iic_t *iip;
- volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
+ 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"));
+ debug("[I2C] i2c_doio\n");
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;
}
- dpaddr = *((unsigned short*)(&immap->im_dprambase[PROFF_I2C_BASE]));
+ dpaddr = immap->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)];
iip = (iic_t *)&immap->im_dprambase[dpaddr];
iip->iic_rbptr = iip->iic_rbase;
iip->iic_tbptr = iip->iic_tbase;
/* Enable I2C */
- PRINTD(("[I2C] Enabling I2C...\n"));
+ debug("[I2C] Enabling I2C...\n");
i2c->i2c_i2mod |= 0x01;
/* Begin transmission */
/* Loop until transmit & receive completed */
- if ((n = state->tx_idx) > 0) {
+ n = state->tx_idx;
+
+ if (n > 0) {
- txbd = ((I2C_BD*)state->txbd) - n;
+ txbd = ((I2C_BD *) state->txbd) - n;
for (i = 0; i < n; i++) {
txtimeo += TOUT_LOOP * txbd->length;
txbd++;
}
- txbd--; /* wait until last in list is done */
+ txbd--; /* wait until last in list is done */
- PRINTD(("[I2C] Transmitting...(txbd=0x%08lx)\n", (ulong)txbd));
+ debug("[I2C] Transmitting...(txbd=0x%08lx)\n",
+ (ulong) txbd);
udelay(START_DELAY_US); /* give it time to start */
- while((txbd->status & BD_SC_READY) && (++txcnt < txtimeo)) {
+ while ((txbd->status & BD_SC_READY) && (++txcnt < txtimeo)) {
udelay(DELAY_US);
if (ctrlc())
- return (-1);
- __asm__ __volatile__ ("eieio");
+ return -1;
+ __asm__ __volatile__("eieio");
}
}
- if (txcnt < txtimeo && (n = state->rx_idx) > 0) {
+ n = state->rx_idx;
- rxbd = ((I2C_BD*)state->rxbd) - n;
+ if (txcnt < txtimeo && n > 0) {
+
+ rxbd = ((I2C_BD *) state->rxbd) - n;
for (i = 0; i < n; i++) {
rxtimeo += TOUT_LOOP * rxbd->length;
rxbd++;
}
- rxbd--; /* wait until last in list is done */
+ rxbd--; /* wait until last in list is done */
- PRINTD(("[I2C] Receiving...(rxbd=0x%08lx)\n", (ulong)rxbd));
+ debug("[I2C] Receiving...(rxbd=0x%08lx)\n", (ulong) rxbd);
udelay(START_DELAY_US); /* give it time to start */
- while((rxbd->status & BD_SC_EMPTY) && (++rxcnt < rxtimeo)) {
+ while ((rxbd->status & BD_SC_EMPTY) && (++rxcnt < rxtimeo)) {
udelay(DELAY_US);
if (ctrlc())
- return (-1);
- __asm__ __volatile__ ("eieio");
+ return -1;
+ __asm__ __volatile__("eieio");
}
}
/* Turn off I2C */
i2c->i2c_i2mod &= ~0x01;
- if ((n = state->tx_idx) > 0) {
+ n = state->tx_idx;
+
+ if (n > 0) {
for (i = 0; i < n; i++) {
- txbd = ((I2C_BD*)state->txbd) - (n - i);
- if ((b = txbd->status & BD_I2C_TX_ERR) != 0) {
+ txbd = ((I2C_BD *) state->txbd) - (n - i);
+ b = txbd->status & BD_I2C_TX_ERR;
+ if (b != 0) {
if (state->err_cb != NULL)
- (*state->err_cb)(I2CECB_TX_ERR|b, i,
- state->cb_data);
+ (*state->err_cb) (I2CECB_TX_ERR | b,
+ i, state->cb_data);
if (rc == 0)
rc = I2CERR_IO_ERROR;
}
}
}
- if ((n = state->rx_idx) > 0) {
+ n = state->rx_idx;
+
+ if (n > 0) {
for (i = 0; i < n; i++) {
- rxbd = ((I2C_BD*)state->rxbd) - (n - i);
- if ((b = rxbd->status & BD_I2C_RX_ERR) != 0) {
+ rxbd = ((I2C_BD *) state->rxbd) - (n - i);
+ b = rxbd->status & BD_I2C_RX_ERR;
+ if (b != 0) {
if (state->err_cb != NULL)
- (*state->err_cb)(I2CECB_RX_ERR|b, i,
- state->cb_data);
+ (*state->err_cb) (I2CECB_RX_ERR | b,
+ i, state->cb_data);
if (rc == 0)
rc = I2CERR_IO_ERROR;
}
}
}
- if ((txtimeo > 0 && txcnt >= txtimeo) || \
+ if ((txtimeo > 0 && txcnt >= txtimeo) ||
(rxtimeo > 0 && rxcnt >= rxtimeo)) {
if (state->err_cb != NULL)
- (*state->err_cb)(I2CECB_TIMEOUT, -1, state->cb_data);
+ (*state->err_cb) (I2CECB_TIMEOUT, -1, state->cb_data);
if (rc == 0)
rc = I2CERR_TIMEOUT;
}
- return (rc);
+ return rc;
}
-static void
-i2c_probe_callback(int flags, int xnum, void *data)
+static void i2c_probe_callback(int flags, int xnum, void *data)
{
/*
* the only acceptable errors are a transmit NAK or a receive
* means the device must have responded to the slave address
* even though the transfer failed
*/
- if (flags == (I2CECB_TX_ERR|I2CECB_TX_NAK))
- *(int *)data |= 1;
- if (flags == (I2CECB_RX_ERR|I2CECB_RX_OV))
- *(int *)data |= 2;
+ if (flags == (I2CECB_TX_ERR | I2CECB_TX_NAK))
+ *(int *) data |= 1;
+ if (flags == (I2CECB_RX_ERR | I2CECB_RX_OV))
+ *(int *) data |= 2;
}
-int
-i2c_probe(uchar chip)
+int i2c_probe(uchar chip)
{
i2c_state_t state;
int rc, err_flag;
state.cb_data = (void *) &err_flag;
err_flag = 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); /* probe failed */
+ return rc; /* probe failed */
rc = i2c_doio(&state);
if (rc == 0)
- return (0); /* device exists - read succeeded */
+ return 0; /* device exists - read succeeded */
if (rc == I2CERR_TIMEOUT)
- return (-1); /* device does not exist - timeout */
+ return -1; /* device does not exist - timeout */
if (rc != I2CERR_IO_ERROR || err_flag == 0)
- return (rc); /* probe failed */
+ return rc; /* probe failed */
if (err_flag & 1)
- return (-1); /* device does not exist - had transmit NAK */
+ return -1; /* device does not exist - had transmit NAK */
- return (0); /* device exists - had receive overrun */
+ return 0; /* device exists - had receive overrun */
}
-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)
{
i2c_state_t state;
uchar xaddr[4];
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
- /*
- * EEPROM chips that implement "address overflow" are ones
- * like Catalyst 24WC04/08/16 which has 9/10/11 bits of 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.
- */
+ /*
+ * EEPROM chips that implement "address overflow" are ones
+ * like Catalyst 24WC04/08/16 which has 9/10/11 bits of 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.
+ */
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;
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)
{
i2c_state_t state;
uchar xaddr[4];
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
- /*
- * EEPROM chips that implement "address overflow" are ones
- * like Catalyst 24WC04/08/16 which has 9/10/11 bits of 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.
- */
+ /*
+ * EEPROM chips that implement "address overflow" are ones
+ * like Catalyst 24WC04/08/16 which has 9/10/11 bits of 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.
+ */
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;
int i2c_set_bus_num(unsigned int bus)
{
-#if defined(CONFIG_I2C_MUX)
- if (bus < CONFIG_SYS_MAX_I2C_BUS) {
- i2c_bus_num = bus;
- } else {
- int ret;
-
- ret = i2x_mux_select_mux(bus);
- if (ret == 0)
- i2c_bus_num = bus;
- else
- return ret;
- }
-#else
if (bus >= CONFIG_SYS_MAX_I2C_BUS)
return -1;
i2c_bus_num = bus;
-#endif
return 0;
}
-#endif /* CONFIG_I2C_MULTI_BUS */
-#endif /* CONFIG_HARD_I2C */
+#endif /* CONFIG_I2C_MULTI_BUS */
+#endif /* CONFIG_HARD_I2C */
projects / karo-tx-uboot.git / blobdiff