diff mbox series

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

Message ID 20240710-tcpc-cleanup-v1-4-0ec1f41f4263@linaro.org
State New
Headers show
Series usb: typec: tcpci: few TCPCi & TCPCi-Maxim cleanups (mostly genmask()) | expand

Commit Message

André Draszik July 10, 2024, 10:36 a.m. UTC 
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@linaro.org>
---
 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 mbox series

Patch

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;