i2c: Move to Linux like `struct i2c_msg`
Our current struct for I2C segments `i2c_seg` was close to being compa-
tible to the Linux version `i2c_msg`, close to being compatible to SMBus
and close to being readable (e.g. what was `chip` supposed to mean?) but
turned out to be hard to fix.
Instead of extending it in a backwards compatible way (and not touching
current controller drivers), replace it with a Linux source compatible
`struct i2c_msg` and patch all the drivers and users with Coccinelle.
The new `struct i2c_msg` should ease porting drivers from Linux and help
to write SMBus compatible controller drivers.
Beside integer type changes, the field `read` is replaced with a generic
field `flags` and `chip` is renamed to `slave`.
Patched with Coccinelle using the clumsy spatch below and some manual
changes:
* Nested struct initializers and one field access skipped by Coccinelle.
* Removed assumption in the code that I2C_M_RD is 1.
* In `i2c.h`, changed all occurences of `chip` to `slave`.
@@ @@
-struct i2c_seg
+struct i2c_msg
@@ identifier msg; expression e; @@
(
struct i2c_msg msg = {
- .read = 0,
+ .flags = 0,
};
|
struct i2c_msg msg = {
- .read = 1,
+ .flags = I2C_M_RD,
};
|
struct i2c_msg msg = {
- .chip = e,
+ .slave = e,
};
)
@@ struct i2c_msg msg; statement S1, S2; @@
(
-if (msg.read)
+if (msg.flags & I2C_M_RD)
S1 else S2
|
-if (msg.read)
+if (msg.flags & I2C_M_RD)
S1
)
@@ struct i2c_msg *msg; statement S1, S2; @@
(
-if (msg->read)
+if (msg->flags & I2C_M_RD)
S1 else S2
|
-if (msg->read)
+if (msg->flags & I2C_M_RD)
S1
)
@@ struct i2c_msg msg; expression e; @@
(
-msg.read = 0;
+msg.flags = 0;
|
-msg.read = 1;
+msg.flags = I2C_M_RD;
|
-msg.read = e;
+msg.flags = e ? I2C_M_RD : 0;
|
-!!(msg.read)
+(msg.flags & I2C_M_RD)
|
-(msg.read)
+(msg.flags & I2C_M_RD)
)
@@ struct i2c_msg *msg; expression e; @@
(
-msg->read = 0;
+msg->flags = 0;
|
-msg->read = 1;
+msg->flags = I2C_M_RD;
|
-msg->read = e;
+msg->flags = e ? I2C_M_RD : 0;
|
-!!(msg->read)
+(msg->flags & I2C_M_RD)
|
-(msg->read)
+(msg->flags & I2C_M_RD)
)
@@ struct i2c_msg msg; @@
-msg.chip
+msg.slave
@@ struct i2c_msg *msg; expression e; @@
-msg[e].chip
+msg[e].slave
@ slave disable ptr_to_array @ struct i2c_msg *msg; @@
-msg->chip
+msg->slave
Change-Id: Ifd7cabf0a18ffd7a1def25d1d7059b713d0b7ea9
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/20542
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
diff --git a/src/cpu/allwinner/a10/twi.c b/src/cpu/allwinner/a10/twi.c
index 3ef5606..123d34e 100644
--- a/src/cpu/allwinner/a10/twi.c
+++ b/src/cpu/allwinner/a10/twi.c
@@ -185,10 +185,10 @@
return len;
}
-int platform_i2c_transfer(unsigned bus, struct i2c_seg *segments, int count)
+int platform_i2c_transfer(unsigned bus, struct i2c_msg *segments, int count)
{
int i, ret = CB_SUCCESS;
- struct i2c_seg *seg = segments;
+ struct i2c_msg *seg = segments;
struct a1x_twi *twi = (void *)TWI_BASE(bus);
@@ -198,12 +198,12 @@
for (i = 0; i < count; i++) {
seg = segments + i;
- if (seg->read) {
- ret = i2c_read(twi, seg->chip, seg->buf, seg->len);
+ if (seg->flags & I2C_M_RD) {
+ ret = i2c_read(twi, seg->slave, seg->buf, seg->len);
if (ret < 0)
break;
} else {
- ret = i2c_write(twi, seg->chip, seg->buf, seg->len);
+ ret = i2c_write(twi, seg->slave, seg->buf, seg->len);
if (ret < 0)
break;
}
diff --git a/src/device/i2c.c b/src/device/i2c.c
index d4670a0..67470d4 100644
--- a/src/device/i2c.c
+++ b/src/device/i2c.c
@@ -49,7 +49,7 @@
return ops->dev_to_bus(pbus->dev);
}
-int i2c_dev_transfer(struct device *dev, struct i2c_seg *segments, int count)
+int i2c_dev_transfer(struct device *dev, struct i2c_msg *segments, int count)
{
int bus = i2c_dev_find_bus(dev);
if (bus < 0)
diff --git a/src/device/software_i2c.c b/src/device/software_i2c.c
index be7aebe..368d145 100644
--- a/src/device/software_i2c.c
+++ b/src/device/software_i2c.c
@@ -238,19 +238,20 @@
return byte;
}
-int software_i2c_transfer(unsigned bus, struct i2c_seg *segments, int count)
+int software_i2c_transfer(unsigned bus, struct i2c_msg *segments, int count)
{
int i;
- struct i2c_seg *seg;
+ struct i2c_msg *seg;
for (seg = segments; seg - segments < count; seg++) {
if (start_cond(bus) < 0)
return -1;
- if (out_byte(bus, seg->chip << 1 | !!seg->read) < 0)
+ const u8 addr_dir = seg->slave << 1 | !!(seg->flags & I2C_M_RD);
+ if (out_byte(bus, addr_dir) < 0)
return -1;
for (i = 0; i < seg->len; i++) {
int ret;
- if (seg->read) {
+ if (seg->flags & I2C_M_RD) {
ret = in_byte(bus, i < seg->len - 1);
seg->buf[i] = (u8)ret;
} else {
diff --git a/src/drivers/i2c/tpm/tpm.c b/src/drivers/i2c/tpm/tpm.c
index cc44b48..1b078f4 100644
--- a/src/drivers/i2c/tpm/tpm.c
+++ b/src/drivers/i2c/tpm/tpm.c
@@ -144,9 +144,10 @@
* retries should usually not be needed, but are kept just to
* be safe on the safe side.
*/
- struct i2c_seg aseg = { .read = 0, .chip = tpm_dev->addr,
+ struct i2c_msg aseg = { .flags = 0, .slave = tpm_dev->addr,
.buf = &addr, .len = 1 };
- struct i2c_seg dseg = { .read = 1, .chip = tpm_dev->addr,
+ struct i2c_msg dseg = { .flags = I2C_M_RD,
+ .slave = tpm_dev->addr,
.buf = buffer, .len = len };
for (count = 0; count < MAX_COUNT; count++) {
rc = i2c_transfer(tpm_dev->bus, &aseg, 1) ||
diff --git a/src/drivers/i2c/ww_ring/ww_ring.c b/src/drivers/i2c/ww_ring/ww_ring.c
index bfecc60..5fb593c 100644
--- a/src/drivers/i2c/ww_ring/ww_ring.c
+++ b/src/drivers/i2c/ww_ring/ww_ring.c
@@ -111,7 +111,7 @@
* the transfer function ignores errors when accessing the reset register.
*/
-static int ledc_transfer(TiLp55231 *ledc, struct i2c_seg *segs,
+static int ledc_transfer(TiLp55231 *ledc, struct i2c_msg *segs,
int seg_count, int reset)
{
int rv, max_attempts = 2;
@@ -128,7 +128,7 @@
if (!reset)
printk(BIOS_WARNING,
"%s: dev %#x, reg %#x, %s transaction error.\n",
- __func__, segs->chip, segs->buf[0],
+ __func__, segs->slave, segs->buf[0],
seg_count == 1 ? "write" : "read");
else
rv = 0;
@@ -144,7 +144,7 @@
static int ledc_write(TiLp55231 *ledc, uint8_t start_addr,
const uint8_t *data, unsigned count)
{
- struct i2c_seg seg;
+ struct i2c_msg seg;
if (count > (sizeof(ledc->data_buffer) - 1)) {
printk(BIOS_WARNING, "%s: transfer size too large (%d bytes)\n",
@@ -155,8 +155,8 @@
memcpy(ledc->data_buffer + 1, data, count);
ledc->data_buffer[0] = start_addr;
- seg.read = 0;
- seg.chip = ledc->dev_addr;
+ seg.flags = 0;
+ seg.slave = ledc->dev_addr;
seg.buf = ledc->data_buffer;
seg.len = count + 1;
@@ -166,15 +166,15 @@
/* To keep things simple, read is limited to one byte at a time. */
static int ledc_read(TiLp55231 *ledc, uint8_t addr, uint8_t *data)
{
- struct i2c_seg seg[2];
+ struct i2c_msg seg[2];
- seg[0].read = 0;
- seg[0].chip = ledc->dev_addr;
+ seg[0].flags = 0;
+ seg[0].slave = ledc->dev_addr;
seg[0].buf = &addr;
seg[0].len = 1;
- seg[1].read = 1;
- seg[1].chip = ledc->dev_addr;
+ seg[1].flags = I2C_M_RD;
+ seg[1].slave = ledc->dev_addr;
seg[1].buf = data;
seg[1].len = 1;
diff --git a/src/ec/google/chromeec/ec_i2c.c b/src/ec/google/chromeec/ec_i2c.c
index eca1eb9..40bd0bb 100644
--- a/src/ec/google/chromeec/ec_i2c.c
+++ b/src/ec/google/chromeec/ec_i2c.c
@@ -45,20 +45,20 @@
struct i2c_ec {
int bus;
- struct i2c_seg segs[SEGS_PER_CMD];
+ struct i2c_msg segs[SEGS_PER_CMD];
};
static struct i2c_ec ec_dev = {
.bus = CONFIG_EC_GOOGLE_CHROMEEC_I2C_BUS,
.segs[CMD_INDEX] = {
- .read = 0,
- .chip = CONFIG_EC_GOOGLE_CHROMEEC_I2C_CHIP,
+ .flags = 0,
+ .slave = CONFIG_EC_GOOGLE_CHROMEEC_I2C_CHIP,
/* Framing byte to be transferred prior to request. */
.buf = &req_buf.framing_bytes[3],
},
.segs[RESP_INDEX] = {
- .read = 1,
- .chip = CONFIG_EC_GOOGLE_CHROMEEC_I2C_CHIP,
+ .flags = I2C_M_RD,
+ .slave = CONFIG_EC_GOOGLE_CHROMEEC_I2C_CHIP,
/* return code and total length before full response. */
.buf = &resp_buf.framing_bytes[2],
},
@@ -100,7 +100,7 @@
if (i2c_transfer(ec->bus, ec->segs, ARRAY_SIZE(ec->segs)) != 0) {
printk(BIOS_ERR, "%s: Cannot complete read from i2c-%d:%#x\n",
- __func__, ec->bus, ec->segs[0].chip);
+ __func__, ec->bus, ec->segs[0].slave);
return -1;
}
diff --git a/src/include/device/i2c.h b/src/include/device/i2c.h
index 6115bd1..9939bc6 100644
--- a/src/include/device/i2c.h
+++ b/src/include/device/i2c.h
@@ -19,6 +19,41 @@
#include <stdint.h>
#include <stdlib.h>
+/**
+ * struct i2c_msg - an I2C transaction segment beginning with START
+ * @addr: Slave address, either seven or ten bits. When this is a ten
+ * bit address, I2C_M_TEN must be set in @flags.
+ * @flags: I2C_M_RD is handled by all adapters.
+ * @len: Number of data bytes in @buf being read from or written to the
+ * I2C slave address. For read transactions where I2C_M_RECV_LEN
+ * is set, the caller guarantees that this buffer can hold up to
+ * 32 bytes in addition to the initial length byte sent by the
+ * slave (plus, if used, the SMBus PEC).
+ * @buf: The buffer into which data is read, or from which it's written.
+ *
+ * An i2c_msg is the low level representation of one segment of an I2C
+ * transaction. It is visible to drivers in the @i2c_transfer() procedure.
+ *
+ * All I2C adapters implement the standard rules for I2C transactions. Each
+ * transaction begins with a START. That is followed by the slave address,
+ * and a bit encoding read versus write. Then follow all the data bytes,
+ * possibly including a byte with SMBus PEC. The transfer terminates with
+ * a NAK, or when all those bytes have been transferred and ACKed. If this
+ * is the last message in a group, it is followed by a STOP. Otherwise it
+ * is followed by the next @i2c_msg transaction segment, beginning with a
+ * (repeated) START.
+ */
+struct i2c_msg {
+ uint16_t flags;
+#define I2C_M_RD 0x0001 /* read data, from slave to master */
+#define I2C_M_TEN 0x0010 /* this is a ten bit chip address */
+#define I2C_M_RECV_LEN 0x0400 /* length will be first received byte */
+#define I2C_M_NOSTART 0x4000 /* don't send a repeated START */
+ uint16_t slave; /* slave address */
+ uint16_t len; /* msg length */
+ uint8_t *buf; /* pointer to msg data */
+};
+
enum i2c_speed {
I2C_SPEED_STANDARD = 100000,
I2C_SPEED_FAST = 400000,
@@ -32,15 +67,9 @@
I2C_MODE_10_BIT
};
-struct i2c_seg {
- int read;
- uint8_t chip;
- uint8_t *buf;
- int len;
-};
-int platform_i2c_transfer(unsigned int bus, struct i2c_seg *segments,
- int count);
+int platform_i2c_transfer(unsigned int bus, struct i2c_msg *segments,
+ int count);
#define SOFTWARE_I2C_MAX_BUS 10 /* increase as necessary */
@@ -53,15 +82,16 @@
extern struct software_i2c_ops *software_i2c[];
-int software_i2c_transfer(unsigned int bus, struct i2c_seg *segments,
- int count);
-void software_i2c_wedge_ack(unsigned int bus, u8 chip);
-void software_i2c_wedge_read(unsigned int bus, u8 chip, u8 reg, int bit_count);
-void software_i2c_wedge_write(unsigned int bus, u8 chip, u8 reg, int bit_count);
+int software_i2c_transfer(unsigned int bus, struct i2c_msg *segments,
+ int count);
+void software_i2c_wedge_ack(unsigned int bus, u8 slave);
+void software_i2c_wedge_read(unsigned int bus, u8 slave, u8 reg, int bit_count);
+void software_i2c_wedge_write(unsigned int bus, u8 slave, u8 reg,
+ int bit_count);
-int i2c_read_field(unsigned int bus, uint8_t chip, uint8_t reg, uint8_t *data,
+int i2c_read_field(unsigned int bus, uint8_t slave, uint8_t reg, uint8_t *data,
uint8_t mask, uint8_t shift);
-int i2c_write_field(unsigned int bus, uint8_t chip, uint8_t reg, uint8_t data,
+int i2c_write_field(unsigned int bus, uint8_t slave, uint8_t reg, uint8_t data,
uint8_t mask, uint8_t shift);
/*
@@ -70,7 +100,7 @@
* Need this ugly stub to arbitrate since I2C device drivers hardcode
* 'i2c_transfer()' as their entry point.
*/
-static inline int i2c_transfer(unsigned int bus, struct i2c_seg *segments,
+static inline int i2c_transfer(unsigned int bus, struct i2c_msg *segments,
int count)
{
if (CONFIG_SOFTWARE_I2C)
@@ -85,11 +115,11 @@
*
* [start][slave addr][r][data][stop]
*/
-static inline int i2c_read_raw(unsigned int bus, uint8_t chip, uint8_t *data,
+static inline int i2c_read_raw(unsigned int bus, uint8_t slave, uint8_t *data,
int len)
{
- struct i2c_seg seg = {
- .read = 1, .chip = chip, .buf = data, .len = len
+ struct i2c_msg seg = {
+ .flags = I2C_M_RD, .slave = slave, .buf = data, .len = len
};
return i2c_transfer(bus, &seg, 1);
@@ -100,11 +130,11 @@
*
* [start][slave addr][w][data][stop]
*/
-static inline int i2c_write_raw(unsigned int bus, uint8_t chip, uint8_t *data,
+static inline int i2c_write_raw(unsigned int bus, uint8_t slave, uint8_t *data,
int len)
{
- struct i2c_seg seg = {
- .read = 0, .chip = chip, .buf = data, .len = len
+ struct i2c_msg seg = {
+ .flags = 0, .slave = slave, .buf = data, .len = len
};
return i2c_transfer(bus, &seg, 1);
@@ -115,19 +145,19 @@
*
* [start][slave addr][w][register addr][start][slave addr][r][data...][stop]
*/
-static inline int i2c_read_bytes(unsigned int bus, uint8_t chip, uint8_t reg,
+static inline int i2c_read_bytes(unsigned int bus, uint8_t slave, uint8_t reg,
uint8_t *data, int len)
{
- struct i2c_seg seg[2];
+ struct i2c_msg seg[2];
- seg[0].read = 0;
- seg[0].chip = chip;
- seg[0].buf = ®
- seg[0].len = 1;
- seg[1].read = 1;
- seg[1].chip = chip;
- seg[1].buf = data;
- seg[1].len = len;
+ seg[0].flags = 0;
+ seg[0].slave = slave;
+ seg[0].buf = ®
+ seg[0].len = 1;
+ seg[1].flags = I2C_M_RD;
+ seg[1].slave = slave;
+ seg[1].buf = data;
+ seg[1].len = len;
return i2c_transfer(bus, seg, ARRAY_SIZE(seg));
}
@@ -137,19 +167,19 @@
*
* [start][slave addr][w][register addr][start][slave addr][r][data][stop]
*/
-static inline int i2c_readb(unsigned int bus, uint8_t chip, uint8_t reg,
+static inline int i2c_readb(unsigned int bus, uint8_t slave, uint8_t reg,
uint8_t *data)
{
- struct i2c_seg seg[2];
+ struct i2c_msg seg[2];
- seg[0].read = 0;
- seg[0].chip = chip;
- seg[0].buf = ®
- seg[0].len = 1;
- seg[1].read = 1;
- seg[1].chip = chip;
- seg[1].buf = data;
- seg[1].len = 1;
+ seg[0].flags = 0;
+ seg[0].slave = slave;
+ seg[0].buf = ®
+ seg[0].len = 1;
+ seg[1].flags = I2C_M_RD;
+ seg[1].slave = slave;
+ seg[1].buf = data;
+ seg[1].len = 1;
return i2c_transfer(bus, seg, ARRAY_SIZE(seg));
}
@@ -159,16 +189,16 @@
*
* [start][slave addr][w][register addr][data][stop]
*/
-static inline int i2c_writeb(unsigned int bus, uint8_t chip, uint8_t reg,
+static inline int i2c_writeb(unsigned int bus, uint8_t slave, uint8_t reg,
uint8_t data)
{
- struct i2c_seg seg;
+ struct i2c_msg seg;
uint8_t buf[] = {reg, data};
- seg.read = 0;
- seg.chip = chip;
- seg.buf = buf;
- seg.len = ARRAY_SIZE(buf);
+ seg.flags = 0;
+ seg.slave = slave;
+ seg.buf = buf;
+ seg.len = ARRAY_SIZE(buf);
return i2c_transfer(bus, &seg, 1);
}
@@ -188,7 +218,7 @@
int i2c_dev_find_bus(struct device *dev);
/* Variants of I2C helper functions that take a device instead of bus number */
-int i2c_dev_transfer(struct device *dev, struct i2c_seg *segments, int count);
+int i2c_dev_transfer(struct device *dev, struct i2c_msg *segments, int count);
int i2c_dev_readb(struct device *dev, uint8_t reg, uint8_t *data);
int i2c_dev_writeb(struct device *dev, uint8_t reg, uint8_t data);
int i2c_dev_read_bytes(struct device *dev, uint8_t reg, uint8_t *data, int len);
diff --git a/src/soc/broadcom/cygnus/i2c.c b/src/soc/broadcom/cygnus/i2c.c
index fe14000..bc43a88 100644
--- a/src/soc/broadcom/cygnus/i2c.c
+++ b/src/soc/broadcom/cygnus/i2c.c
@@ -103,13 +103,14 @@
I2C_MASTER_RX_FIFO_FLUSH | I2C_MASTER_TX_FIFO_FLUSH);
}
-static int i2c_write(struct cygnus_i2c_regs *reg_addr, struct i2c_seg *segment)
+static int i2c_write(struct cygnus_i2c_regs *reg_addr,
+ struct i2c_msg *segment)
{
uint8_t *data = segment->buf;
unsigned int val, status;
int i, ret;
- write32(®_addr->i2c_master_data_wr, segment->chip << 1);
+ write32(®_addr->i2c_master_data_wr, segment->slave << 1);
for (i = 0; i < segment->len; i++) {
val = data[i];
@@ -150,13 +151,13 @@
return ret;
}
-static int i2c_read(struct cygnus_i2c_regs *reg_addr, struct i2c_seg *segment)
+static int i2c_read(struct cygnus_i2c_regs *reg_addr, struct i2c_msg *segment)
{
uint8_t *data = segment->buf;
int i, ret;
unsigned int status;
- write32(®_addr->i2c_master_data_wr, segment->chip << 1 | 1);
+ write32(®_addr->i2c_master_data_wr, segment->slave << 1 | 1);
/*
* Now we can activate the transfer. Specify the number of bytes to read
@@ -190,7 +191,7 @@
}
static int i2c_do_xfer(struct cygnus_i2c_regs *reg_addr,
- struct i2c_seg *segment)
+ struct i2c_msg *segment)
{
int ret;
@@ -206,7 +207,7 @@
return EBUSY;
}
- if (segment->read)
+ if (segment->flags & I2C_M_RD)
ret = i2c_read(reg_addr, segment);
else
ret = i2c_write(reg_addr, segment);
@@ -214,12 +215,13 @@
return ret;
}
-int platform_i2c_transfer(unsigned bus, struct i2c_seg *segments, int seg_count)
+int platform_i2c_transfer(unsigned bus, struct i2c_msg *segments,
+ int seg_count)
{
int i;
int res = 0;
struct cygnus_i2c_regs *regs = i2c_bus[bus];
- struct i2c_seg *seg = segments;
+ struct i2c_msg *seg = segments;
for (i = 0; i < seg_count; i++, seg++) {
res = i2c_do_xfer(regs, seg);
diff --git a/src/soc/intel/common/block/i2c/lpss_i2c.c b/src/soc/intel/common/block/i2c/lpss_i2c.c
index 5b188f8..711517f 100644
--- a/src/soc/intel/common/block/i2c/lpss_i2c.c
+++ b/src/soc/intel/common/block/i2c/lpss_i2c.c
@@ -258,7 +258,7 @@
/* Transfer one byte of one segment, sending stop bit if requested */
static int lpss_i2c_transfer_byte(struct lpss_i2c_regs *regs,
- struct i2c_seg *segment,
+ struct i2c_msg *segment,
size_t byte, int send_stop)
{
struct stopwatch sw;
@@ -266,7 +266,7 @@
stopwatch_init_usecs_expire(&sw, LPSS_I2C_TIMEOUT_US);
- if (!segment->read) {
+ if (!(segment->flags & I2C_M_RD)) {
/* Write op only: Wait for FIFO not full */
while (!(read32(®s->status) & STATUS_TX_FIFO_NOT_FULL)) {
if (stopwatch_expired(&sw)) {
@@ -283,7 +283,7 @@
write32(®s->cmd_data, cmd);
- if (segment->read) {
+ if (segment->flags & I2C_M_RD) {
/* Read op only: Wait for FIFO data and store it */
while (!(read32(®s->status) & STATUS_RX_FIFO_NOT_EMPTY)) {
if (stopwatch_expired(&sw)) {
@@ -298,7 +298,8 @@
}
/* Global I2C bus handler, defined in include/i2c.h */
-int platform_i2c_transfer(unsigned int bus, struct i2c_seg *segments, int count)
+int platform_i2c_transfer(unsigned int bus, struct i2c_msg *segments,
+ int count)
{
struct stopwatch sw;
struct lpss_i2c_regs *regs;
@@ -325,11 +326,12 @@
while (count--) {
if (CONFIG_SOC_INTEL_COMMON_LPSS_I2C_DEBUG)
printk(BIOS_DEBUG, "i2c %u:%02x %s %d bytes : ",
- bus, segments->chip, segments->read ? "R" : "W",
+ bus, segments->slave,
+ (segments->flags & I2C_M_RD) ? "R" : "W",
segments->len);
/* Set target slave address */
- write32(®s->target_addr, segments->chip);
+ write32(®s->target_addr, segments->slave);
/* Read or write each byte in segment */
for (byte = 0; byte < segments->len; byte++) {
@@ -341,8 +343,9 @@
if (lpss_i2c_transfer_byte(regs, segments, byte,
count == 0) < 0) {
printk(BIOS_ERR, "I2C %s failed: bus %u "
- "addr 0x%02x\n", segments->read ?
- "read" : "write", bus, segments->chip);
+ "addr 0x%02x\n",
+ (segments->flags & I2C_M_RD) ?
+ "read" : "write", bus, segments->slave);
goto out;
}
}
diff --git a/src/soc/intel/quark/i2c.c b/src/soc/intel/quark/i2c.c
index 2601738..e8dba53 100644
--- a/src/soc/intel/quark/i2c.c
+++ b/src/soc/intel/quark/i2c.c
@@ -186,8 +186,8 @@
return bytes_transferred;
}
-int platform_i2c_transfer(unsigned int bus, struct i2c_seg *segment,
- int seg_count)
+int platform_i2c_transfer(unsigned int bus, struct i2c_msg *segment,
+ int seg_count)
{
int bytes_transferred;
uint8_t chip;
@@ -212,9 +212,9 @@
printk(BIOS_ERR,
"I2C segment[%d]: %s 0x%02x %s 0x%p, 0x%08x bytes\n",
index,
- segment[index].read ? "Read from" : "Write to",
- segment[index].chip,
- segment[index].read ? "to " : "from",
+ (segment[index].flags & I2C_M_RD) ? "Read from" : "Write to",
+ segment[index].slave,
+ (segment[index].flags & I2C_M_RD) ? "to " : "from",
segment[index].buf,
segment[index].len);
printk(BIOS_ERR, "I2C %s\n",
@@ -243,7 +243,7 @@
regs->ic_con = cmd;
/* Set the target chip address */
- chip = segment->chip;
+ chip = segment->slave;
regs->ic_tar = chip;
/* Enable the I2C controller */
@@ -270,13 +270,13 @@
total_bytes += length;
ASSERT(segment->buf != NULL);
ASSERT(length >= 1);
- ASSERT(segment->chip == chip);
+ ASSERT(segment->slave == chip);
/* Determine if this is the last segment of the transaction */
stop = (index == seg_count) ? IC_DATA_CMD_STOP : 0;
/* Fill the FIFO with the necessary command bytes */
- if (segment->read) {
+ if (segment->flags & I2C_M_RD) {
/* Place read commands into the FIFO */
rx_buffer = segment->buf;
data_bytes = platform_i2c_read(restart, rx_buffer,
diff --git a/src/soc/mediatek/mt8173/i2c.c b/src/soc/mediatek/mt8173/i2c.c
index f07ffc9..1d541e5 100644
--- a/src/soc/mediatek/mt8173/i2c.c
+++ b/src/soc/mediatek/mt8173/i2c.c
@@ -136,7 +136,7 @@
I2CLOG("addr address %x\n", (uint32_t)regs);
}
-static uint32_t mtk_i2c_transfer(uint8_t bus, struct i2c_seg *seg,
+static uint32_t mtk_i2c_transfer(uint8_t bus, struct i2c_msg *seg,
enum i2c_modes read)
{
uint32_t ret_code = I2C_OK;
@@ -154,7 +154,7 @@
regs = i2c[bus].i2c_regs;
dma_regs = i2c[bus].i2c_dma_regs;
- addr = seg[0].chip;
+ addr = seg[0].slave;
switch (read) {
case I2C_WRITE_MODE:
@@ -305,26 +305,31 @@
return ret_code;
}
-static uint8_t mtk_i2c_should_combine(struct i2c_seg *seg, int left_count)
+static uint8_t mtk_i2c_should_combine(struct i2c_msg *seg, int left_count)
{
- if (left_count >= 2 && seg[0].read == 0 && seg[1].read == 1 &&
- seg[0].chip == seg[1].chip)
+ if (left_count >= 2 &&
+ !(seg[0].flags & I2C_M_RD) &&
+ (seg[1].flags & I2C_M_RD) &&
+ seg[0].slave == seg[1].slave)
return 1;
else
return 0;
}
-int platform_i2c_transfer(unsigned bus, struct i2c_seg *segments, int seg_count)
+int platform_i2c_transfer(unsigned bus, struct i2c_msg *segments,
+ int seg_count)
{
int ret = 0;
int i;
int read;
for (i = 0; i < seg_count; i++) {
- if (mtk_i2c_should_combine(&segments[i], seg_count - i))
+ if (mtk_i2c_should_combine(&segments[i], seg_count - i)) {
read = I2C_WRITE_READ_MODE;
- else
- read = segments[i].read;
+ } else {
+ read = (segments[i].flags & I2C_M_RD) ?
+ I2C_READ_MODE : I2C_WRITE_MODE;
+ }
ret = mtk_i2c_transfer(bus, &segments[i], read);
diff --git a/src/soc/nvidia/tegra/i2c.c b/src/soc/nvidia/tegra/i2c.c
index 926b768..e371a9d 100644
--- a/src/soc/nvidia/tegra/i2c.c
+++ b/src/soc/nvidia/tegra/i2c.c
@@ -187,9 +187,9 @@
return 0;
}
-int platform_i2c_transfer(unsigned bus, struct i2c_seg *segments, int count)
+int platform_i2c_transfer(unsigned bus, struct i2c_msg *segments, int count)
{
- struct i2c_seg *seg = segments;
+ struct i2c_msg *seg = segments;
int i;
if (bus >= g_num_i2c_buses) {
@@ -199,8 +199,9 @@
}
for (i = 0; i < count; seg++, i++) {
- if (i2c_transfer_segment(bus, seg->chip, i < count - 1,
- seg->read, seg->buf, seg->len))
+ if (i2c_transfer_segment(bus, seg->slave, i < count - 1,
+ seg->flags & I2C_M_RD,
+ seg->buf, seg->len))
return -1;
}
return 0;
diff --git a/src/soc/qualcomm/ipq40xx/i2c.c b/src/soc/qualcomm/ipq40xx/i2c.c
index 772bf8b..0cffaac 100644
--- a/src/soc/qualcomm/ipq40xx/i2c.c
+++ b/src/soc/qualcomm/ipq40xx/i2c.c
@@ -155,19 +155,20 @@
return 0;
}
-int platform_i2c_transfer(unsigned bus, struct i2c_seg *segments, int seg_count)
+int platform_i2c_transfer(unsigned bus, struct i2c_msg *segments,
+ int seg_count)
{
- struct i2c_seg *seg = segments;
+ struct i2c_msg *seg = segments;
int ret = 0;
if (i2c_init(bus))
return 1;
while (!ret && seg_count--) {
- if (seg->read)
- ret = i2c_read(bus, seg->chip, seg->buf, seg->len);
+ if (seg->flags & I2C_M_RD)
+ ret = i2c_read(bus, seg->slave, seg->buf, seg->len);
else
- ret = i2c_write(bus, seg->chip, seg->buf, seg->len,
+ ret = i2c_write(bus, seg->slave, seg->buf, seg->len,
(seg_count ? 0 : 1));
seg++;
}
diff --git a/src/soc/qualcomm/ipq806x/i2c.c b/src/soc/qualcomm/ipq806x/i2c.c
index e121ae8..009cb94 100644
--- a/src/soc/qualcomm/ipq806x/i2c.c
+++ b/src/soc/qualcomm/ipq806x/i2c.c
@@ -142,19 +142,20 @@
return 0;
}
-int platform_i2c_transfer(unsigned bus, struct i2c_seg *segments, int seg_count)
+int platform_i2c_transfer(unsigned bus, struct i2c_msg *segments,
+ int seg_count)
{
- struct i2c_seg *seg = segments;
+ struct i2c_msg *seg = segments;
int ret = 0;
if (i2c_init(bus))
return 1;
while (!ret && seg_count--) {
- if (seg->read)
- ret = i2c_read(bus, seg->chip, seg->buf, seg->len);
+ if (seg->flags & I2C_M_RD)
+ ret = i2c_read(bus, seg->slave, seg->buf, seg->len);
else
- ret = i2c_write(bus, seg->chip, seg->buf, seg->len,
+ ret = i2c_write(bus, seg->slave, seg->buf, seg->len,
(seg_count ? 0 : 1));
seg++;
}
diff --git a/src/soc/rockchip/common/i2c.c b/src/soc/rockchip/common/i2c.c
index 032efda..5847f16 100644
--- a/src/soc/rockchip/common/i2c.c
+++ b/src/soc/rockchip/common/i2c.c
@@ -124,7 +124,7 @@
return res;
}
-static int i2c_read(struct rk_i2c_regs *reg_addr, struct i2c_seg segment)
+static int i2c_read(struct rk_i2c_regs *reg_addr, struct i2c_msg segment)
{
int res = 0;
uint8_t *data = segment.buf;
@@ -136,7 +136,7 @@
unsigned int con = 0;
unsigned int i, j;
- write32(®_addr->i2c_mrxaddr, I2C_8BIT | segment.chip << 1 | 1);
+ write32(®_addr->i2c_mrxaddr, I2C_8BIT | segment.slave << 1 | 1);
write32(®_addr->i2c_mrxraddr, 0);
con = I2C_MODE_TRX | I2C_EN | I2C_ACT2NAK;
while (bytes_remaining) {
@@ -182,7 +182,7 @@
return res;
}
-static int i2c_write(struct rk_i2c_regs *reg_addr, struct i2c_seg segment)
+static int i2c_write(struct rk_i2c_regs *reg_addr, struct i2c_msg segment)
{
int res = 0;
uint8_t *data = segment.buf;
@@ -194,7 +194,7 @@
unsigned int j = 1;
u32 txdata = 0;
- txdata |= (segment.chip << 1);
+ txdata |= (segment.slave << 1);
while (bytes_remaining) {
bytes_transferred = MIN(bytes_remaining, 32);
words_transferred = ALIGN_UP(bytes_transferred, 4) / 4;
@@ -239,25 +239,26 @@
return res;
}
-static int i2c_do_xfer(void *reg_addr, struct i2c_seg segment)
+static int i2c_do_xfer(void *reg_addr, struct i2c_msg segment)
{
int res = 0;
if (i2c_send_start(reg_addr))
return I2C_TIMEOUT;
- if (segment.read)
+ if (segment.flags & I2C_M_RD)
res = i2c_read(reg_addr, segment);
else
res = i2c_write(reg_addr, segment);
return i2c_send_stop(reg_addr) || res;
}
-int platform_i2c_transfer(unsigned bus, struct i2c_seg *segments, int seg_count)
+int platform_i2c_transfer(unsigned bus, struct i2c_msg *segments,
+ int seg_count)
{
int i;
int res = 0;
struct rk_i2c_regs *regs = (struct rk_i2c_regs *)(i2c_bus[bus]);
- struct i2c_seg *seg = segments;
+ struct i2c_msg *seg = segments;
for (i = 0; i < seg_count; i++, seg++) {
res = i2c_do_xfer(regs, *seg);
diff --git a/src/soc/samsung/exynos5250/i2c.c b/src/soc/samsung/exynos5250/i2c.c
index 2f3f28f..6319a10 100644
--- a/src/soc/samsung/exynos5250/i2c.c
+++ b/src/soc/samsung/exynos5250/i2c.c
@@ -234,7 +234,8 @@
return 0;
}
-int platform_i2c_transfer(unsigned bus, struct i2c_seg *segments, int seg_count)
+int platform_i2c_transfer(unsigned bus, struct i2c_msg *segments,
+ int seg_count)
{
struct s3c24x0_i2c_bus *i2c = &i2c_busses[bus];
struct i2c_regs *regs = i2c->regs;
@@ -247,12 +248,12 @@
int i;
for (i = 0; i < seg_count; i++) {
- struct i2c_seg *seg = &segments[i];
+ struct i2c_msg *seg = &segments[i];
- res = i2c_send_start(regs, seg->read, seg->chip);
+ res = i2c_send_start(regs, seg->flags & I2C_M_RD, seg->slave);
if (res)
break;
- if (seg->read)
+ if (seg->flags & I2C_M_RD)
res = i2c_recv_buf(regs, seg->buf, seg->len);
else
res = i2c_xmit_buf(regs, seg->buf, seg->len);
diff --git a/src/soc/samsung/exynos5420/i2c.c b/src/soc/samsung/exynos5420/i2c.c
index 9a9b197..ae9560f 100644
--- a/src/soc/samsung/exynos5420/i2c.c
+++ b/src/soc/samsung/exynos5420/i2c.c
@@ -445,11 +445,12 @@
return len ? -1 : 0;
}
-static int hsi2c_segment(struct i2c_seg *seg, struct hsi2c_regs *regs, int stop)
+static int hsi2c_segment(struct i2c_msg *seg, struct hsi2c_regs *regs,
+ int stop)
{
const uint32_t usi_ctl = Hsi2cFuncModeI2c | Hsi2cMaster;
- write32(®s->i2c_addr, HSI2C_SLV_ADDR_MAS(seg->chip));
+ write32(®s->i2c_addr, HSI2C_SLV_ADDR_MAS(seg->slave));
/*
* We really only want to stop after this transaction (I think) if the
@@ -461,7 +462,7 @@
uint32_t autoconf =
seg->len | Hsi2cMasterRun | Hsi2cStopAfterTrans;
- if (seg->read) {
+ if (seg->flags & I2C_M_RD) {
write32(®s->usi_ctl, usi_ctl | Hsi2cRxchon);
write32(®s->i2c_auto_conf, autoconf | Hsi2cReadWrite);
@@ -482,7 +483,7 @@
return 0;
}
-static int hsi2c_transfer(struct i2c_bus *i2c, struct i2c_seg *segments,
+static int hsi2c_transfer(struct i2c_bus *i2c, struct i2c_msg *segments,
int count)
{
struct hsi2c_regs *regs = i2c->hsregs;
@@ -627,7 +628,7 @@
return 0;
}
-int platform_i2c_transfer(unsigned bus, struct i2c_seg *segments, int count)
+int platform_i2c_transfer(unsigned bus, struct i2c_msg *segments, int count)
{
struct i2c_bus *i2c = &i2c_busses[bus];
if (i2c->is_highspeed)
@@ -643,12 +644,12 @@
int i;
for (i = 0; i < count; i++) {
- struct i2c_seg *seg = &segments[i];
+ struct i2c_msg *seg = &segments[i];
- res = i2c_send_start(regs, seg->read, seg->chip);
+ res = i2c_send_start(regs, seg->flags & I2C_M_RD, seg->slave);
if (res)
break;
- if (seg->read)
+ if (seg->flags & I2C_M_RD)
res = i2c_recv_buf(regs, seg->buf, seg->len);
else
res = i2c_xmit_buf(regs, seg->buf, seg->len);