[PATCH 04/15] usb: typec: tcpci: use GENMASK() for TCPC_ROLE_CTRL_CC[12]

From: André Draszik
Date: Wed Jul 10 2024 - 06:40:15 EST

Next message: André Draszik: "[PATCH 06/15] usb: typec: tcpci: use GENMASK() for TCPC_MSG_HDR_INFO_REV"
Previous message: André Draszik: "[PATCH 05/15] usb: typec: tcpci: use GENMASK() for TCPC_ROLE_CTRL_RP_VAL"
In reply to: André Draszik: "[PATCH 05/15] usb: typec: tcpci: use GENMASK() for TCPC_ROLE_CTRL_RP_VAL"
Next in thread: André Draszik: "[PATCH 06/15] usb: typec: tcpci: use GENMASK() for TCPC_MSG_HDR_INFO_REV"
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All this open-coded shifting and masking is quite hard to read, in
particular the if-statement in tcpci_apply_rc().

Declare TCPC_ROLE_CTRL_CC[12] using GENMASK() which allows using
FIELD_GET() and FIELD_PREP() to arguably make the code more legible.

Signed-off-by: André Draszik <andre.draszik@xxxxxxxxxx>
---
drivers/usb/typec/anx7411.c | 5 ++-
drivers/usb/typec/tcpm/tcpci.c | 73 +++++++++++++++-------------------
drivers/usb/typec/tcpm/tcpci_rt1711h.c | 8 ++--
include/linux/usb/tcpci.h | 9 ++---
4 files changed, 43 insertions(+), 52 deletions(-)

diff --git a/drivers/usb/typec/anx7411.c b/drivers/usb/typec/anx7411.c
index b12a07edc71b..78b0d856cfc1 100644
--- a/drivers/usb/typec/anx7411.c
+++ b/drivers/usb/typec/anx7411.c
@@ -6,6 +6,7 @@
* Copyright(c) 2022, Analogix Semiconductor. All rights reserved.
*
*/
+#include <linux/bitfield.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
@@ -884,8 +885,8 @@ static void anx7411_chip_standby(struct anx7411_data *ctx)
OCM_RESET);
ret |= anx7411_reg_write(ctx->tcpc_client, ANALOG_CTRL_10, 0x80);
/* Set TCPC to RD and DRP enable */
- cc1 = TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT;
- cc2 = TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT;
+ cc1 = FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_RD);
+ cc2 = FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_RD);
ret |= anx7411_reg_write(ctx->tcpc_client, TCPC_ROLE_CTRL,
TCPC_ROLE_CTRL_DRP | cc1 | cc2);

diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
index ce11a154c7dc..cd71ece7b956 100644
--- a/drivers/usb/typec/tcpm/tcpci.c
+++ b/drivers/usb/typec/tcpm/tcpci.c
@@ -104,45 +104,42 @@ static int tcpci_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc)

switch (cc) {
case TYPEC_CC_RA:
- reg = (TCPC_ROLE_CTRL_CC_RA << TCPC_ROLE_CTRL_CC1_SHIFT) |
- (TCPC_ROLE_CTRL_CC_RA << TCPC_ROLE_CTRL_CC2_SHIFT);
+ reg = (FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_RA)
+ | FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_RA));
break;
case TYPEC_CC_RD:
- reg = (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) |
- (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT);
+ reg = (FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_RD)
+ | FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_RD));
break;
case TYPEC_CC_RP_DEF:
- reg = (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) |
- (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT) |
- (TCPC_ROLE_CTRL_RP_VAL_DEF <<
- TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+ reg = (FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_RP)
+ | FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_RP)
+ | (TCPC_ROLE_CTRL_RP_VAL_DEF << TCPC_ROLE_CTRL_RP_VAL_SHIFT));
break;
case TYPEC_CC_RP_1_5:
- reg = (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) |
- (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT) |
- (TCPC_ROLE_CTRL_RP_VAL_1_5 <<
- TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+ reg = (FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_RP)
+ | FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_RP)
+ | (TCPC_ROLE_CTRL_RP_VAL_1_5 << TCPC_ROLE_CTRL_RP_VAL_SHIFT));
break;
case TYPEC_CC_RP_3_0:
- reg = (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) |
- (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT) |
- (TCPC_ROLE_CTRL_RP_VAL_3_0 <<
- TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+ reg = (FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_RP)
+ | FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_RP)
+ | (TCPC_ROLE_CTRL_RP_VAL_3_0 << TCPC_ROLE_CTRL_RP_VAL_SHIFT));
break;
case TYPEC_CC_OPEN:
default:
- reg = (TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC1_SHIFT) |
- (TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC2_SHIFT);
+ reg = (FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_OPEN)
+ | FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_OPEN));
break;
}

if (vconn_pres) {
if (polarity == TYPEC_POLARITY_CC2) {
- reg &= ~(TCPC_ROLE_CTRL_CC1_MASK << TCPC_ROLE_CTRL_CC1_SHIFT);
- reg |= (TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC1_SHIFT);
+ reg &= ~TCPC_ROLE_CTRL_CC1;
+ reg |= FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_OPEN);
} else {
- reg &= ~(TCPC_ROLE_CTRL_CC2_MASK << TCPC_ROLE_CTRL_CC2_SHIFT);
- reg |= (TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC2_SHIFT);
+ reg &= ~TCPC_ROLE_CTRL_CC2;
+ reg |= FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_OPEN);
}
}

@@ -168,15 +165,11 @@ static int tcpci_apply_rc(struct tcpc_dev *tcpc, enum typec_cc_status cc,
* APPLY_RC state is when ROLE_CONTROL.CC1 != ROLE_CONTROL.CC2 and vbus autodischarge on
* disconnect is disabled. Bail out when ROLE_CONTROL.CC1 != ROLE_CONTROL.CC2.
*/
- if (((reg & (TCPC_ROLE_CTRL_CC2_MASK << TCPC_ROLE_CTRL_CC2_SHIFT)) >>
- TCPC_ROLE_CTRL_CC2_SHIFT) !=
- ((reg & (TCPC_ROLE_CTRL_CC1_MASK << TCPC_ROLE_CTRL_CC1_SHIFT)) >>
- TCPC_ROLE_CTRL_CC1_SHIFT))
+ if (FIELD_GET(TCPC_ROLE_CTRL_CC2, reg) != FIELD_GET(TCPC_ROLE_CTRL_CC1, reg))
return 0;

return regmap_update_bits(tcpci->regmap, TCPC_ROLE_CTRL, polarity == TYPEC_POLARITY_CC1 ?
- TCPC_ROLE_CTRL_CC2_MASK << TCPC_ROLE_CTRL_CC2_SHIFT :
- TCPC_ROLE_CTRL_CC1_MASK << TCPC_ROLE_CTRL_CC1_SHIFT,
+ TCPC_ROLE_CTRL_CC2 : TCPC_ROLE_CTRL_CC1,
TCPC_ROLE_CTRL_CC_OPEN);
}

@@ -215,11 +208,11 @@ static int tcpci_start_toggling(struct tcpc_dev *tcpc,
}

if (cc == TYPEC_CC_RD)
- reg |= (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) |
- (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT);
+ reg |= (FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_RD)
+ | FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_RD));
else
- reg |= (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) |
- (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT);
+ reg |= (FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_RP)
+ | FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_RP));
ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg);
if (ret < 0)
return ret;
@@ -281,28 +274,28 @@ static int tcpci_set_polarity(struct tcpc_dev *tcpc,
reg = reg & ~TCPC_ROLE_CTRL_DRP;

if (polarity == TYPEC_POLARITY_CC2) {
- reg &= ~(TCPC_ROLE_CTRL_CC2_MASK << TCPC_ROLE_CTRL_CC2_SHIFT);
+ reg &= ~TCPC_ROLE_CTRL_CC2;
/* Local port is source */
if (cc2 == TYPEC_CC_RD)
/* Role control would have the Rp setting when DRP was enabled */
- reg |= TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT;
+ reg |= FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_RP);
else
- reg |= TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT;
+ reg |= FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_RD);
} else {
- reg &= ~(TCPC_ROLE_CTRL_CC1_MASK << TCPC_ROLE_CTRL_CC1_SHIFT);
+ reg &= ~TCPC_ROLE_CTRL_CC1;
/* Local port is source */
if (cc1 == TYPEC_CC_RD)
/* Role control would have the Rp setting when DRP was enabled */
- reg |= TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT;
+ reg |= FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_RP);
else
- reg |= TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT;
+ reg |= FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_RD);
}
}

if (polarity == TYPEC_POLARITY_CC2)
- reg |= TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC1_SHIFT;
+ reg |= FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_OPEN);
else
- reg |= TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC2_SHIFT;
+ reg |= FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_OPEN);
ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg);
if (ret < 0)
return ret;
diff --git a/drivers/usb/typec/tcpm/tcpci_rt1711h.c b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
index c6dbccf6b17a..bdb78d08b5b5 100644
--- a/drivers/usb/typec/tcpm/tcpci_rt1711h.c
+++ b/drivers/usb/typec/tcpm/tcpci_rt1711h.c
@@ -246,11 +246,11 @@ static int rt1711h_start_drp_toggling(struct tcpci *tcpci,
}

if (cc == TYPEC_CC_RD)
- reg |= (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) |
- (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT);
+ reg |= (FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_RD)
+ | FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_RD));
else
- reg |= (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) |
- (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT);
+ reg |= (FIELD_PREP(TCPC_ROLE_CTRL_CC1, TCPC_ROLE_CTRL_CC_RP)
+ | FIELD_PREP(TCPC_ROLE_CTRL_CC2, TCPC_ROLE_CTRL_CC_RP));

ret = rt1711h_write8(chip, TCPC_ROLE_CTRL, reg);
if (ret < 0)
diff --git a/include/linux/usb/tcpci.h b/include/linux/usb/tcpci.h
index 31d21ccf662b..552d074429f0 100644
--- a/include/linux/usb/tcpci.h
+++ b/include/linux/usb/tcpci.h
@@ -68,10 +68,8 @@
#define TCPC_ROLE_CTRL_RP_VAL_DEF 0x0
#define TCPC_ROLE_CTRL_RP_VAL_1_5 0x1
#define TCPC_ROLE_CTRL_RP_VAL_3_0 0x2
-#define TCPC_ROLE_CTRL_CC2_SHIFT 2
-#define TCPC_ROLE_CTRL_CC2_MASK 0x3
-#define TCPC_ROLE_CTRL_CC1_SHIFT 0
-#define TCPC_ROLE_CTRL_CC1_MASK 0x3
+#define TCPC_ROLE_CTRL_CC2 GENMASK(3, 2)
+#define TCPC_ROLE_CTRL_CC1 GENMASK(1, 0)
#define TCPC_ROLE_CTRL_CC_RA 0x0
#define TCPC_ROLE_CTRL_CC_RP 0x1
#define TCPC_ROLE_CTRL_CC_RD 0x2
@@ -176,8 +174,7 @@

#define tcpc_presenting_rd(reg, cc) \
(!(TCPC_ROLE_CTRL_DRP & (reg)) && \
- (((reg) & (TCPC_ROLE_CTRL_## cc ##_MASK << TCPC_ROLE_CTRL_## cc ##_SHIFT)) == \
- (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_## cc ##_SHIFT)))
+ FIELD_GET(TCPC_ROLE_CTRL_## cc, reg) == TCPC_ROLE_CTRL_CC_RD)

struct tcpci;

--
2.45.2.803.g4e1b14247a-goog

Next message: André Draszik: "[PATCH 06/15] usb: typec: tcpci: use GENMASK() for TCPC_MSG_HDR_INFO_REV"
Previous message: André Draszik: "[PATCH 05/15] usb: typec: tcpci: use GENMASK() for TCPC_ROLE_CTRL_RP_VAL"
In reply to: André Draszik: "[PATCH 05/15] usb: typec: tcpci: use GENMASK() for TCPC_ROLE_CTRL_RP_VAL"
Next in thread: André Draszik: "[PATCH 06/15] usb: typec: tcpci: use GENMASK() for TCPC_MSG_HDR_INFO_REV"
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