ec/dell/mec5035: Replace defines with enums

Instead of using defines for command IDs and argument values, use enums
to provide more type safety. This also has the effect of moving the
command IDs to a more central location instead of defines spread out
throughout the header.

Change-Id: I788531e8b70e79541213853f177326d217235ef2
Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82998
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>

2 files changed, 17 insertions, 13 deletions

diff --git a/src/ec/dell/mec5035/mec5035.c b/src/ec/dell/mec5035/mec5035.c
index 68b6b2f7fb..dffbb7960c 100644
--- a/src/ec/dell/mec5035/mec5035.c
+++ b/src/ec/dell/mec5035/mec5035.c
@@ -66,17 +66,17 @@ static enum cb_err write_mailbox_regs(const u8 *data, u8 start, u8 count)
 	return CB_SUCCESS;
 }
 
-static void ec_command(u8 cmd)
+static void ec_command(enum mec5035_cmd cmd)
 {
 	outb(0, MAILBOX_INDEX);
-	outb(cmd, MAILBOX_DATA);
+	outb((u8)cmd, MAILBOX_DATA);
 	wait_ec();
 }
 
-u8 mec5035_mouse_touchpad(u8 setting)
+u8 mec5035_mouse_touchpad(enum ec_mouse_setting setting)
 {
-	u8 buf[15] = {0};
-	write_mailbox_regs(&setting, 2, 1);
+	u8 buf[15] = {(u8)setting};
+	write_mailbox_regs(buf, 2, 1);
 	ec_command(CMD_MOUSE_TP);
 	/* The vendor firmware reads 15 bytes starting at index 1, presumably
 	   to get some sort of return code. Though I don't know for sure if
diff --git a/src/ec/dell/mec5035/mec5035.h b/src/ec/dell/mec5035/mec5035.h
index fa15a9d621..32f791cb01 100644
--- a/src/ec/dell/mec5035/mec5035.h
+++ b/src/ec/dell/mec5035/mec5035.h
@@ -7,16 +7,20 @@
 
 #define NUM_REGISTERS	32
 
+enum mec5035_cmd {
+	CMD_MOUSE_TP = 0x1a,
+	CMD_RADIO_CTRL = 0x2b,
+	CMD_CPU_OK = 0xc2,
+};
+
 /* Touchpad (TP) and mouse related. The EC seems to
    default to 0 which results in the TP not working. */
-#define CMD_MOUSE_TP	0x1a
-#define SERIAL_MOUSE	0 /* Disable TP, force use of a serial mouse */
-#define PS2_MOUSE	1 /* Disable TP when using a PS/2 mouse */
-#define TP_PS2_MOUSE	2 /* Leave TP enabled when using a PS/2 mouse */
-
-#define CMD_CPU_OK	0xc2
+enum ec_mouse_setting {
+	SERIAL_MOUSE = 0, /* Disable TP, force use of a serial mouse */
+	PS2_MOUSE, /* Disable TP when using a PS/2 mouse */
+	TP_PS2_MOUSE /* Leave TP enabled when using a PS/2 mouse */
+};
 
-#define CMD_RADIO_CTRL 0x2b
 #define RADIO_CTRL_NUM_ARGS 3
 enum ec_radio_dev {
 	RADIO_WLAN = 0,
@@ -29,7 +33,7 @@ enum ec_radio_state {
 	RADIO_ON
 };
 
-u8 mec5035_mouse_touchpad(u8 setting);
+u8 mec5035_mouse_touchpad(enum ec_mouse_setting setting);
 void mec5035_cpu_ok(void);
 void mec5035_early_init(void);
 void mec5035_control_radio(enum ec_radio_dev device, enum ec_radio_state state);