mb/google/nissa/var/craask: Modify GPIOs for NVMe

Modify NVMe clkreq pin to GPP_D7 from GPP_D6.The design change is for
commonality of GPIO settings. To reserve craask GPIO table and add
craaskneto/craaskino's NVMe GPIO setting. In the change, clkreq# will
be 2 and clksrc is still 1.

BUG=b:259211172
TEST=Verify on reworked craask DUT to boot up from NVMe.

Change-Id: If45c1a87144d5370b1ca2525295fb7947639362f
Signed-off-by: Ren Kuo <ren.kuo@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71170
Reviewed-by: Reka Norman <rekanorman@chromium.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Dtrain Hsu <dtrain_hsu@compal.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/brya/variants/craask/fw_config.c

@@ -50,39 +50,16 @@ static const struct pad_config stylus_disable_pads[] = {
 static const struct pad_config nvme_disable_pads[] = {
 	/* B4  : SSD_PERST_L */
 	PAD_NC_LOCK(GPP_B4, NONE, LOCK_CONFIG),
+	/* D7  : SSD_CLKREQ_ODL */
+	PAD_NC(GPP_D7, NONE),
 	/* D11 : EN_PP3300_SSD */
 	PAD_NC_LOCK(GPP_D11, NONE, LOCK_CONFIG),
 	/* E17 : SSD_PLN_L */
 	PAD_NC_LOCK(GPP_E17, NONE, LOCK_CONFIG),
-	/*
-	 * Note: don't disable GPP_D6 = SSD_CLKREQ_ODL, since this is used as
-	 * WWAN_EN on LTE variants.
-	 */
-};
-
-/*
- * GPP_D6 is used as WWAN_EN on LTE variants and SSD_CLKREQ_ODL on NVMe
- * variants (there is no craask variant supporting both LTE and NVMe).
- * In craask/gpio.c, it's set to WWAN_EN since this needs to be done in
- * bootblock. So we override it to SSD_CLKREQ_ODL here for NVMe variants.
- */
-static const struct pad_config nvme_enable_pads[] = {
-	/* D6  : SRCCLKREQ1# ==> SSD_CLKREQ_ODL */
-	PAD_CFG_NF(GPP_D6, NONE, DEEP, NF1),
 };
 
 void fw_config_gpio_padbased_override(struct pad_config *padbased_table)
 {
-	/*
-	 * Since GPP_D6 is used as WWAN_EN on LTE variants and SSD_CLKREQ_ODL on
-	 * NVMe variants, we don't support both together. If there's a variant
-	 * using both in the future, this GPIO handling will need to be updated.
-	 */
-	if (fw_config_probe(FW_CONFIG(DB_USB, DB_1C_LTE)) &&
-	    fw_config_probe(FW_CONFIG(STORAGE, STORAGE_NVME))) {
-		printk(BIOS_ERR, "LTE and NVMe together is not supported on craask\n");
-	}
-
 	if (!fw_config_probe(FW_CONFIG(DB_USB, DB_1C_LTE))) {
 		printk(BIOS_INFO, "Disable LTE-related GPIO pins on craask.\n");
 		gpio_padbased_override(padbased_table, lte_disable_pads,
@@ -107,16 +84,7 @@ void fw_config_gpio_padbased_override(struct pad_config *padbased_table)
 						ARRAY_SIZE(stylus_disable_pads));
 	}
 
-	if (!fw_config_is_provisioned() ||
+	if (fw_config_is_provisioned() && !fw_config_probe(FW_CONFIG(STORAGE, STORAGE_NVME))) {
-	    fw_config_probe(FW_CONFIG(STORAGE, STORAGE_NVME))) {
-		/*
-		 * Note: this must be done after lte_disable_pads, otherwise
-		 * GPP_D6 will be disabled again.
-		 */
-		printk(BIOS_INFO, "Enable NVMe SSD GPIO pins.\n");
-		gpio_padbased_override(padbased_table, nvme_enable_pads,
-						ARRAY_SIZE(nvme_enable_pads));
-	} else {
 		printk(BIOS_INFO, "Disable NVMe SSD GPIO pins.\n");
 		gpio_padbased_override(padbased_table, nvme_disable_pads,
 						ARRAY_SIZE(nvme_disable_pads));

src/mainboard/google/brya/variants/craask/gpio.c

@@ -13,8 +13,8 @@ static const struct pad_config override_gpio_table[] = {
 	PAD_CFG_GPO_LOCK(GPP_B4, 1, LOCK_CONFIG),
 	/* D6  : WWAN_EN */
 	PAD_CFG_GPO(GPP_D6, 1, DEEP),
-	/* D7  : WLAN_CLKREQ_ODL */
+	/* D7  : SRCCLKREQ1# ==> SSD_CLKREQ_ODL */
-	PAD_NC(GPP_D7, NONE),
+	PAD_CFG_NF(GPP_D7, NONE, DEEP, NF1),
 	/* D11 : EN_PP3300_SSD */
 	PAD_CFG_GPO_LOCK(GPP_D11, 1, LOCK_CONFIG),
 	/* E17 : SSD_PLN_L */

src/mainboard/google/brya/variants/craask/overridetree.cb

@@ -447,10 +447,10 @@ chip soc/intel/alderlake
 			probe SD_CARD SD_GL9750S
 		end
 		device ref pcie_rp9 on
-			# Enable NVMe SSD PCIe 9-12 using clk 1
+			# Enable NVMe SSD PCIe 9-12 using clk 2
 			register "pch_pcie_rp[PCH_RP(9)]" = "{
 				.clk_src = 1,
-				.clk_req = 1,
+				.clk_req = 2,
 				.flags = PCIE_RP_LTR | PCIE_RP_AER,
 			}"
 		end