From ca11326bd991395bc88921375808e10b0e74e3be Mon Sep 17 00:00:00 2001
From: Shane Smiskol <shane@smiskol.com>
Date: Sun, 9 Oct 2022 12:39:48 -0700
Subject: [PATCH] GM: abstract PCM-related hw check (#1090)

abstract hw check to if pcm_cruise or not
---
 board/safety/safety_gm.h | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/board/safety/safety_gm.h b/board/safety/safety_gm.h
index 038bfe723c..c9560d5ab7 100644
--- a/board/safety/safety_gm.h
+++ b/board/safety/safety_gm.h
@@ -51,6 +51,7 @@ enum {
 };
 
 enum {GM_ASCM, GM_CAM} gm_hw = GM_ASCM;
+bool gm_pcm_cruise = false;
 
 static int gm_rx_hook(CANPacket_t *to_push) {
 
@@ -73,7 +74,7 @@ static int gm_rx_hook(CANPacket_t *to_push) {
     }
 
     // ACC steering wheel buttons (GM_CAM is tied to the PCM)
-    if ((addr == 481) && (gm_hw == GM_ASCM)) {
+    if ((addr == 481) && !gm_pcm_cruise) {
       int button = (GET_BYTE(to_push, 5) & 0x70U) >> 4;
 
       // exit controls on cancel press
@@ -101,7 +102,7 @@ static int gm_rx_hook(CANPacket_t *to_push) {
       gas_pressed = GET_BYTE(to_push, 5) != 0U;
 
       // enter controls on rising edge of ACC, exit controls when ACC off
-      if (gm_hw == GM_CAM) {
+      if (gm_pcm_cruise) {
         bool cruise_engaged = (GET_BYTE(to_push, 1) >> 5) != 0U;
         pcm_cruise_check(cruise_engaged);
       }
@@ -234,7 +235,7 @@ static int gm_tx_hook(CANPacket_t *to_send, bool longitudinal_allowed) {
   }
 
   // BUTTONS: used for resume spamming and cruise cancellation with stock longitudinal
-  if ((addr == 481) && (gm_hw == GM_CAM)) {
+  if ((addr == 481) && gm_pcm_cruise) {
     int button = (GET_BYTE(to_send, 5) >> 4) & 0x7U;
 
     bool allowed_cancel = (button == 6) && cruise_engaged_prev;
@@ -271,6 +272,7 @@ static int gm_fwd_hook(int bus_num, CANPacket_t *to_fwd) {
 
 static const addr_checks* gm_init(uint16_t param) {
   gm_hw = GET_FLAG(param, GM_PARAM_HW_CAM) ? GM_CAM : GM_ASCM;
+  gm_pcm_cruise = gm_hw == GM_CAM;
   return &gm_rx_checks;
 }