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i2c: busses: make use of i2c_8bit_addr_from_msg 

Because it looks neater.

For diolan, this allows factoring out some code that is now common
between if and else.

For eg20t, pch_i2c_writebytes is always called with a write in
msgs->flags, and pch_i2c_readbytes with a read.

For imx, i2c_imx_dma_write and i2c_imx_write are always called with a
write in msgs->flags, and i2c_imx_read with a read.

For qup, qup_i2c_write_tx_fifo_v1 is always called with a write in
qup->msg->flags.

For stu300, also restructure debug output for resends, since that
code as a result is only handling debug output.

Reviewed-by: Guenter Roeck <linux@roeck-us.net> [diolan]
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> [efm32 and imx]
Acked-by: Linus Walleij <linus.walleij@linaro.org> [stu300]
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Peter Rosin 2018-05-16 09:16:47 +02:00 committed by Wolfram Sang
parent ac6d5298f6
commit 30a6475744
18 changed files with 47 additions and 70 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/i2c/busses/i2c-aspeed.c
View File

@ -335,13 +335,12 @@ static void aspeed_i2c_do_start(struct aspeed_i2c_bus *bus)
{
u32 command = ASPEED_I2CD_M_START_CMD | ASPEED_I2CD_M_TX_CMD;
struct i2c_msg *msg = &bus->msgs[bus->msgs_index];
u8 slave_addr = msg->addr << 1;
u8 slave_addr = i2c_8bit_addr_from_msg(msg);
bus->master_state = ASPEED_I2C_MASTER_START;
bus->buf_index = 0;
if (msg->flags & I2C_M_RD) {
slave_addr |= 1;
command |= ASPEED_I2CD_M_RX_CMD;
/* Need to let the hardware know to NACK after RX. */
if (msg->len == 1 && !(msg->flags & I2C_M_RECV_LEN))

5
drivers/i2c/busses/i2c-axxia.c
View File

@ -351,13 +351,15 @@ static int axxia_i2c_xfer_msg(struct axxia_i2c_dev *idev, struct i2c_msg *msg)
* addr_2: addr[7:0]
*/
addr_1 = 0xF0 | ((msg->addr >> 7) & 0x06);
if (i2c_m_rd(msg))
addr_1 |= 1; /* Set the R/nW bit of the address */
addr_2 = msg->addr & 0xFF;
} else {
/* 7-bit address
* addr_1: addr[6:0] | (R/nW)
* addr_2: dont care
*/
addr_1 = (msg->addr << 1) & 0xFF;
addr_1 = i2c_8bit_addr_from_msg(msg);
addr_2 = 0;
}
@ -365,7 +367,6 @@ static int axxia_i2c_xfer_msg(struct axxia_i2c_dev *idev, struct i2c_msg *msg)
/* I2C read transfer */
rx_xfer = i2c_m_recv_len(msg) ? I2C_SMBUS_BLOCK_MAX : msg->len;
tx_xfer = 0;
addr_1 |= 1; /* Set the R/nW bit of the address */
} else {
/* I2C write transfer */
rx_xfer = 0;

11
drivers/i2c/busses/i2c-diolan-u2c.c
View File

@ -360,11 +360,11 @@ static int diolan_usb_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs,
if (ret < 0)
goto abort;
}
ret = diolan_i2c_put_byte_ack(dev,
i2c_8bit_addr_from_msg(pmsg));
if (ret < 0)
goto abort;
if (pmsg->flags & I2C_M_RD) {
ret =
diolan_i2c_put_byte_ack(dev, (pmsg->addr << 1) | 1);
if (ret < 0)
goto abort;
for (j = 0; j < pmsg->len; j++) {
u8 byte;
bool ack = j < pmsg->len - 1;
@ -393,9 +393,6 @@ static int diolan_usb_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs,
pmsg->buf[j] = byte;
}
} else {
ret = diolan_i2c_put_byte_ack(dev, pmsg->addr << 1);
if (ret < 0)
goto abort;
for (j = 0; j < pmsg->len; j++) {
ret = diolan_i2c_put_byte_ack(dev,
pmsg->buf[j]);

3
drivers/i2c/busses/i2c-efm32.c
View File

@ -144,8 +144,7 @@ static void efm32_i2c_send_next_msg(struct efm32_i2c_ddata *ddata)
struct i2c_msg *cur_msg = &ddata->msgs[ddata->current_msg];
efm32_i2c_write32(ddata, REG_CMD, REG_CMD_START);
efm32_i2c_write32(ddata, REG_TXDATA, cur_msg->addr << 1 |
(cur_msg->flags & I2C_M_RD ? 1 : 0));
efm32_i2c_write32(ddata, REG_TXDATA, i2c_8bit_addr_from_msg(cur_msg));
}
static void efm32_i2c_send_next_byte(struct efm32_i2c_ddata *ddata)

5
drivers/i2c/busses/i2c-eg20t.c
View File

@ -414,7 +414,7 @@ static s32 pch_i2c_writebytes(struct i2c_adapter *i2c_adap,
iowrite32(addr_8_lsb, p + PCH_I2CDR);
} else {
/* set 7 bit slave address and R/W bit as 0 */
iowrite32(addr << 1, p + PCH_I2CDR);
iowrite32(i2c_8bit_addr_from_msg(msgs), p + PCH_I2CDR);
if (first)
pch_i2c_start(adap);
}
@ -538,8 +538,7 @@ static s32 pch_i2c_readbytes(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs,
iowrite32(addr_2_msb | TEN_BIT_ADDR_MASK, p + PCH_I2CDR);
} else {
/* 7 address bits + R/W bit */
addr = (((addr) << 1) | (I2C_RD));
iowrite32(addr, p + PCH_I2CDR);
iowrite32(i2c_8bit_addr_from_msg(msgs), p + PCH_I2CDR);
}
/* check if it is the first message */

2
drivers/i2c/busses/i2c-emev2.c
View File

@ -149,7 +149,7 @@ static int __em_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msg,
em_clear_set_bit(priv, 0, I2C_BIT_STT0, I2C_OFS_IICC0);
/* Send slave address and R/W type */
writeb((msg->addr << 1) | read, priv->base + I2C_OFS_IIC0);
writeb(i2c_8bit_addr_from_msg(msg), priv->base + I2C_OFS_IIC0);
/* Wait for transaction */
status = em_i2c_wait_for_event(priv);

9
drivers/i2c/busses/i2c-hix5hd2.c
View File

@ -73,7 +73,6 @@
#define I2C_OVER_INTR BIT(0)
#define HIX5I2C_MAX_FREQ 400000 /* 400k */
#define HIX5I2C_READ_OPERATION 0x01
enum hix5hd2_i2c_state {
HIX5I2C_STAT_RW_ERR = -1,
@ -311,12 +310,8 @@ static void hix5hd2_i2c_message_start(struct hix5hd2_i2c_priv *priv, int stop)
hix5hd2_i2c_clr_all_irq(priv);
hix5hd2_i2c_enable_irq(priv);
if (priv->msg->flags & I2C_M_RD)
writel_relaxed((priv->msg->addr << 1) | HIX5I2C_READ_OPERATION,
priv->regs + HIX5I2C_TXR);
else
writel_relaxed(priv->msg->addr << 1,
priv->regs + HIX5I2C_TXR);
writel_relaxed(i2c_8bit_addr_from_msg(priv->msg),
priv->regs + HIX5I2C_TXR);
writel_relaxed(I2C_WRITE | I2C_START, priv->regs + HIX5I2C_COM);
spin_unlock_irqrestore(&priv->lock, flags);

4
drivers/i2c/busses/i2c-imx-lpi2c.c
View File

@ -180,15 +180,13 @@ static int lpi2c_imx_start(struct lpi2c_imx_struct *lpi2c_imx,
struct i2c_msg *msgs)
{
unsigned int temp;
u8 read;
temp = readl(lpi2c_imx->base + LPI2C_MCR);
temp |= MCR_RRF | MCR_RTF;
writel(temp, lpi2c_imx->base + LPI2C_MCR);
writel(0x7f00, lpi2c_imx->base + LPI2C_MSR);
read = msgs->flags & I2C_M_RD;
temp = (msgs->addr << 1 | read) | (GEN_START << 8);
temp = i2c_8bit_addr_from_msg(msgs) | (GEN_START << 8);
writel(temp, lpi2c_imx->base + LPI2C_MTDR);
return lpi2c_imx_bus_busy(lpi2c_imx);

10
drivers/i2c/busses/i2c-imx.c
View File

@ -621,7 +621,7 @@ static int i2c_imx_dma_write(struct imx_i2c_struct *i2c_imx,
* Write slave address.
* The first byte must be transmitted by the CPU.
*/
imx_i2c_write_reg(msgs->addr << 1, i2c_imx, IMX_I2C_I2DR);
imx_i2c_write_reg(i2c_8bit_addr_from_msg(msgs), i2c_imx, IMX_I2C_I2DR);
reinit_completion(&i2c_imx->dma->cmd_complete);
time_left = wait_for_completion_timeout(
&i2c_imx->dma->cmd_complete,
@ -751,10 +751,10 @@ static int i2c_imx_write(struct imx_i2c_struct *i2c_imx, struct i2c_msg *msgs)
int i, result;
dev_dbg(&i2c_imx->adapter.dev, "<%s> write slave address: addr=0x%x\n",
__func__, msgs->addr << 1);
__func__, i2c_8bit_addr_from_msg(msgs));
/* write slave address */
imx_i2c_write_reg(msgs->addr << 1, i2c_imx, IMX_I2C_I2DR);
imx_i2c_write_reg(i2c_8bit_addr_from_msg(msgs), i2c_imx, IMX_I2C_I2DR);
result = i2c_imx_trx_complete(i2c_imx);
if (result)
return result;
@ -787,10 +787,10 @@ static int i2c_imx_read(struct imx_i2c_struct *i2c_imx, struct i2c_msg *msgs, bo
dev_dbg(&i2c_imx->adapter.dev,
"<%s> write slave address: addr=0x%x\n",
__func__, (msgs->addr << 1) | 0x01);
__func__, i2c_8bit_addr_from_msg(msgs));
/* write slave address */
imx_i2c_write_reg((msgs->addr << 1) | 0x01, i2c_imx, IMX_I2C_I2DR);
imx_i2c_write_reg(i2c_8bit_addr_from_msg(msgs), i2c_imx, IMX_I2C_I2DR);
result = i2c_imx_trx_complete(i2c_imx);
if (result)
return result;

7
drivers/i2c/busses/i2c-kempld.c
View File

@ -124,15 +124,14 @@ static int kempld_i2c_process(struct kempld_i2c_data *i2c)
/* 10 bit address? */
if (i2c->msg->flags & I2C_M_TEN) {
addr = 0xf0 | ((i2c->msg->addr >> 7) & 0x6);
/* Set read bit if necessary */
addr |= (i2c->msg->flags & I2C_M_RD) ? 1 : 0;
i2c->state = STATE_ADDR10;
} else {
addr = (i2c->msg->addr << 1);
addr = i2c_8bit_addr_from_msg(i2c->msg);
i2c->state = STATE_START;
}
/* Set read bit if necessary */
addr |= (i2c->msg->flags & I2C_M_RD) ? 1 : 0;
kempld_write8(pld, KEMPLD_I2C_DATA, addr);
kempld_write8(pld, KEMPLD_I2C_CMD, I2C_CMD_START);

9
drivers/i2c/busses/i2c-mxs.c
View File

@ -180,9 +180,10 @@ static int mxs_i2c_dma_setup_xfer(struct i2c_adapter *adap,
struct dma_async_tx_descriptor *desc;
struct mxs_i2c_dev *i2c = i2c_get_adapdata(adap);
i2c->addr_data = i2c_8bit_addr_from_msg(msg);
if (msg->flags & I2C_M_RD) {
i2c->dma_read = true;
i2c->addr_data = (msg->addr << 1) | I2C_SMBUS_READ;
/*
* SELECT command.
@ -240,7 +241,6 @@ static int mxs_i2c_dma_setup_xfer(struct i2c_adapter *adap,
}
} else {
i2c->dma_read = false;
i2c->addr_data = (msg->addr << 1) | I2C_SMBUS_WRITE;
/*
* WRITE command.
@ -371,7 +371,7 @@ static int mxs_i2c_pio_setup_xfer(struct i2c_adapter *adap,
struct i2c_msg *msg, uint32_t flags)
{
struct mxs_i2c_dev *i2c = i2c_get_adapdata(adap);
uint32_t addr_data = msg->addr << 1;
uint32_t addr_data = i2c_8bit_addr_from_msg(msg);
uint32_t data = 0;
int i, ret, xlen = 0, xmit = 0;
uint32_t start;
@ -411,8 +411,6 @@ static int mxs_i2c_pio_setup_xfer(struct i2c_adapter *adap,
*/
BUG_ON(msg->len > 4);
addr_data |= I2C_SMBUS_READ;
/* SELECT command. */
mxs_i2c_pio_trigger_write_cmd(i2c, MXS_CMD_I2C_SELECT,
addr_data);
@ -450,7 +448,6 @@ static int mxs_i2c_pio_setup_xfer(struct i2c_adapter *adap,
* fast enough. It is possible to transfer arbitrary amount
* of data using PIO write.
*/
addr_data |= I2C_SMBUS_WRITE;
/*
* The LSB of data buffer is the first byte blasted across

5
drivers/i2c/busses/i2c-ocores.c
View File

@ -222,10 +222,7 @@ static int ocores_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
i2c->nmsgs = num;
i2c->state = STATE_START;
oc_setreg(i2c, OCI2C_DATA,
(i2c->msg->addr << 1) |
((i2c->msg->flags & I2C_M_RD) ? 1:0));
oc_setreg(i2c, OCI2C_DATA, i2c_8bit_addr_from_msg(i2c->msg));
oc_setreg(i2c, OCI2C_CMD, OCI2C_CMD_START);
if (wait_event_timeout(i2c->wait, (i2c->state == STATE_ERROR) ||

2
drivers/i2c/busses/i2c-pasemi.c
View File

@ -121,7 +121,7 @@ static int pasemi_i2c_xfer_msg(struct i2c_adapter *adapter,
read = msg->flags & I2C_M_RD ? 1 : 0;
TXFIFO_WR(smbus, MTXFIFO_START | (msg->addr << 1) | read);
TXFIFO_WR(smbus, MTXFIFO_START | i2c_8bit_addr_from_msg(msg));
if (read) {
TXFIFO_WR(smbus, msg->len | MTXFIFO_READ |

2
drivers/i2c/busses/i2c-qup.c
View File

@ -462,7 +462,7 @@ static void qup_i2c_write_tx_fifo_v1(struct qup_i2c_dev *qup)
{
struct qup_i2c_block *blk = &qup->blk;
struct i2c_msg *msg = qup->msg;
u32 addr = msg->addr << 1;
u32 addr = i2c_8bit_addr_from_msg(msg);
u32 qup_tag;
int idx;
u32 val;

2
drivers/i2c/busses/i2c-rcar.c
View File

@ -329,7 +329,7 @@ static void rcar_i2c_prepare_msg(struct rcar_i2c_priv *priv)
if (priv->msgs_left == 1)
priv->flags |= ID_LAST_MSG;
rcar_i2c_write(priv, ICMAR, (priv->msg->addr << 1) | read);
rcar_i2c_write(priv, ICMAR, i2c_8bit_addr_from_msg(priv->msg));
/*
* We don't have a test case but the HW engineers say that the write order
* of ICMSR and ICMCR depends on whether we issue START or REP_START. Since

5
drivers/i2c/busses/i2c-riic.c
View File

@ -167,15 +167,14 @@ static irqreturn_t riic_tdre_isr(int irq, void *data)
return IRQ_NONE;
if (riic->bytes_left == RIIC_INIT_MSG) {
val = !!(riic->msg->flags & I2C_M_RD);
if (val)
if (riic->msg->flags & I2C_M_RD)
/* On read, switch over to receive interrupt */
riic_clear_set_bit(riic, ICIER_TIE, ICIER_RIE, RIIC_ICIER);
else
/* On write, initialize length */
riic->bytes_left = riic->msg->len;
val |= (riic->msg->addr << 1);
val = i2c_8bit_addr_from_msg(riic->msg);
} else {
val = *riic->buf;
riic->buf++;

22
drivers/i2c/busses/i2c-stu300.c
View File

@ -602,20 +602,24 @@ static int stu300_send_address(struct stu300_dev *dev,
u32 val;
int ret;
if (msg->flags & I2C_M_TEN)
if (msg->flags & I2C_M_TEN) {
/* This is probably how 10 bit addresses look */
val = (0xf0 | (((u32) msg->addr & 0x300) >> 7)) &
I2C_DR_D_MASK;
else
val = ((msg->addr << 1) & I2C_DR_D_MASK);
if (msg->flags & I2C_M_RD)
/* This is the direction bit */
val |= 0x01;
} else {
val = i2c_8bit_addr_from_msg(msg);
}
if (msg->flags & I2C_M_RD) {
/* This is the direction bit */
val |= 0x01;
if (resend)
if (resend) {
if (msg->flags & I2C_M_RD)
dev_dbg(&dev->pdev->dev, "read resend\n");
} else if (resend)
dev_dbg(&dev->pdev->dev, "write resend\n");
else
dev_dbg(&dev->pdev->dev, "write resend\n");
}
stu300_wr8(val, dev->virtbase + I2C_DR);
/* For 10bit addressing, await 10bit request (EVENT 9) */

11
drivers/i2c/busses/i2c-xiic.c
View File

@ -143,12 +143,6 @@ struct xiic_i2c {
#define XIIC_TX_RX_INTERRUPTS (XIIC_INTR_RX_FULL_MASK | XIIC_TX_INTERRUPTS)
/* The following constants are used with the following macros to specify the
* operation, a read or write operation.
*/
#define XIIC_READ_OPERATION 1
#define XIIC_WRITE_OPERATION 0
/*
* Tx Fifo upper bit masks.
*/
@ -556,8 +550,7 @@ static void xiic_start_recv(struct xiic_i2c *i2c)
if (!(msg->flags & I2C_M_NOSTART))
/* write the address */
xiic_setreg16(i2c, XIIC_DTR_REG_OFFSET,
(msg->addr << 1) | XIIC_READ_OPERATION |
XIIC_TX_DYN_START_MASK);
i2c_8bit_addr_from_msg(msg) | XIIC_TX_DYN_START_MASK);
xiic_irq_clr_en(i2c, XIIC_INTR_BNB_MASK);
@ -585,7 +578,7 @@ static void xiic_start_send(struct xiic_i2c *i2c)
if (!(msg->flags & I2C_M_NOSTART)) {
/* write the address */
u16 data = ((msg->addr << 1) & 0xfe) | XIIC_WRITE_OPERATION |
u16 data = i2c_8bit_addr_from_msg(msg) |
XIIC_TX_DYN_START_MASK;
if ((i2c->nmsgs == 1) && msg->len == 0)
/* no data and last message -> add STOP */