soc/intel/alderlake: Refactor PCIE port config

Refactor PCIE port config structure. Make it easier to map from
schematic. We don't have to convert the PCIE ports RP number and
CLK source in devicetree. All the convert will be done by SoC level.

Signed-off-by: Eric Lai <ericr_lai@compal.corp-partner.google.com>
Change-Id: I0b390e43f8e99b19cfad178139b86a2f77d7a57b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48340
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

3 files changed, 75 insertions, 59 deletions

diff --git a/src/soc/intel/alderlake/chip.h b/src/soc/intel/alderlake/chip.h
index 0f932ce132..13e77cf534 100644
--- a/src/soc/intel/alderlake/chip.h
+++ b/src/soc/intel/alderlake/chip.h
@@ -19,10 +19,6 @@
 #define MAX_HD_AUDIO_SNDW_LINKS 4
 #define MAX_HD_AUDIO_SSP_LINKS  6
 
-#define PCIE_CLK_NOTUSED 0xFF
-#define PCIE_CLK_LAN     0x70
-#define PCIE_CLK_FREE    0x80
-
 struct soc_intel_alderlake_config {
 
 	/* Common struct containing soc config data required by common code */
@@ -122,31 +118,9 @@ struct soc_intel_alderlake_config {
 	uint8_t PchHdaIDispLinkFrequency;
 	uint8_t PchHdaIDispCodecDisconnect;
 
-	/* CPU PCIe Root Ports */
-	uint8_t CpuPcieRpEnable[CONFIG_MAX_CPU_ROOT_PORTS];
-
-	/* PCH PCIe Root Ports */
-	uint8_t PchPcieRpEnable[CONFIG_MAX_PCH_ROOT_PORTS];
-	uint8_t PcieRpHotPlug[CONFIG_MAX_PCH_ROOT_PORTS];
-	/* PCIe output clocks type to PCIe devices.
-	 * 0-23: PCH rootport, 0x70: LAN, 0x80: unspecified but in use,
-	 * 0xFF: not used */
-	uint8_t PcieClkSrcUsage[CONFIG_MAX_PCIE_CLOCK_SRC];
-	/* PCIe ClkReq-to-ClkSrc mapping, number of clkreq signal assigned to
-	 * clksrc. */
-	uint8_t PcieClkSrcClkReq[CONFIG_MAX_PCIE_CLOCK_REQ];
-
-	/* Probe CLKREQ# signal before enabling CLKREQ# based power management.*/
-	uint8_t PcieRpClkReqDetect[CONFIG_MAX_PCH_ROOT_PORTS];
-
-	/* PCIe RP L1 substate */
-	enum L1_substates_control PcieRpL1Substates[CONFIG_MAX_PCH_ROOT_PORTS];
-
-	/* PCIe LTR: Enable (1) / Disable (0) */
-	uint8_t PcieRpLtrEnable[CONFIG_MAX_PCH_ROOT_PORTS];
-
-	/* PCIE RP Advanced Error Report: Enable (1) / Disable (0) */
-	uint8_t PcieRpAdvancedErrorReporting[CONFIG_MAX_PCH_ROOT_PORTS];
+	struct pcie_rp_config pch_pcie_rp[CONFIG_MAX_PCH_ROOT_PORTS];
+	struct pcie_rp_config cpu_pcie_rp[CONFIG_MAX_CPU_ROOT_PORTS];
+	uint8_t pcie_clk_config_flag[CONFIG_MAX_PCIE_CLOCK_SRC];
 
 	/* Gfx related */
 	enum {
diff --git a/src/soc/intel/alderlake/fsp_params.c b/src/soc/intel/alderlake/fsp_params.c
index 35f7a3c2e2..6e6f1af94f 100644
--- a/src/soc/intel/alderlake/fsp_params.c
+++ b/src/soc/intel/alderlake/fsp_params.c
@@ -15,6 +15,7 @@
 #include <soc/gpio_soc_defs.h>
 #include <soc/intel/common/vbt.h>
 #include <soc/pci_devs.h>
+#include <soc/pcie.h>
 #include <soc/ramstage.h>
 #include <soc/soc_chip.h>
 #include <string.h>
@@ -93,6 +94,7 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
 	const struct microcode *microcode_file;
 	size_t microcode_len;
 	FSP_S_CONFIG *params = &supd->FspsConfig;
+	uint32_t enable_mask;
 
 	struct device *dev;
 	struct soc_intel_alderlake_config *config;
@@ -270,19 +272,19 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
 	/* Enable Hybrid storage auto detection */
 	params->HybridStorageMode = config->HybridStorageMode;
 
+	enable_mask = pcie_rp_enable_mask(get_pch_pcie_rp_table());
 	for (i = 0; i < CONFIG_MAX_PCH_ROOT_PORTS; i++) {
+		if (!(enable_mask & BIT(i)))
+			continue;
+		const struct pcie_rp_config *rp_cfg = &config->pch_pcie_rp[i];
 		params->PcieRpL1Substates[i] =
-			get_l1_substate_control(config->PcieRpL1Substates[i]);
-		params->PcieRpLtrEnable[i] = config->PcieRpLtrEnable[i];
-		params->PcieRpAdvancedErrorReporting[i] =
-		config->PcieRpAdvancedErrorReporting[i];
-		params->PcieRpHotPlug[i] = config->PcieRpHotPlug[i];
+				get_l1_substate_control(rp_cfg->PcieRpL1Substates);
+		params->PcieRpLtrEnable[i] = !!(rp_cfg->flags & PCIE_RP_LTR);
+		params->PcieRpAdvancedErrorReporting[i] = !!(rp_cfg->flags & PCIE_RP_AER);
+		params->PcieRpHotPlug[i] = !!(rp_cfg->flags & PCIE_RP_HOTPLUG);
+		params->PcieRpClkReqDetect[i] = !!(rp_cfg->flags & PCIE_RP_CLK_REQ_DETECT);
 	}
 
-	/* Enable ClkReqDetect for enabled port */
-	memcpy(params->PcieRpClkReqDetect, config->PcieRpClkReqDetect,
-		sizeof(config->PcieRpClkReqDetect));
-
 	params->PmSupport = 1;
 	params->Hwp = 1;
 	params->Cx = 1;
diff --git a/src/soc/intel/alderlake/romstage/fsp_params.c b/src/soc/intel/alderlake/romstage/fsp_params.c
index 0154cb4848..385246734e 100644
--- a/src/soc/intel/alderlake/romstage/fsp_params.c
+++ b/src/soc/intel/alderlake/romstage/fsp_params.c
@@ -7,20 +7,58 @@
 #include <fsp/util.h>
 #include <intelblocks/cpulib.h>
 #include <intelblocks/mp_init.h>
+#include <intelblocks/pcie_rp.h>
 #include <soc/gpio_soc_defs.h>
 #include <soc/iomap.h>
 #include <soc/msr.h>
 #include <soc/pci_devs.h>
+#include <soc/pcie.h>
 #include <soc/romstage.h>
 #include <soc/soc_chip.h>
 #include <string.h>
 
+#define FSP_CLK_NOTUSED			0xFF
+#define FSP_CLK_LAN			0x70
+#define FSP_CLK_FREE_RUNNING		0x80
+
+#define CPU_PCIE_BASE			0x40
+
+enum pcie_rp_type {
+	PCH_PCIE_RP,
+	CPU_PCIE_RP,
+};
+
+static uint8_t clk_src_to_fsp(enum pcie_rp_type type, int rp_number)
+{
+	assert(type == PCH_PCIE_RP || type == CPU_PCIE_RP);
+
+	if (type == PCH_PCIE_RP)
+		return rp_number;
+	else // type == CPU_PCIE_RP
+		return CPU_PCIE_BASE + rp_number;
+}
+
+static void pcie_rp_init(FSP_M_CONFIG *m_cfg, uint32_t en_mask, enum pcie_rp_type type,
+			const struct pcie_rp_config *cfg, size_t cfg_count)
+{
+	size_t i;
+
+	for (i = 0; i < cfg_count; i++) {
+		if (!(en_mask & BIT(i)))
+			continue;
+		if (cfg[i].flags & PCIE_RP_CLK_SRC_UNUSED)
+			continue;
+		if (!(cfg[i].flags & PCIE_RP_CLK_REQ_UNUSED))
+			m_cfg->PcieClkSrcClkReq[cfg[i].clk_src] = cfg[i].clk_req;
+		m_cfg->PcieClkSrcUsage[cfg[i].clk_src] = clk_src_to_fsp(type, i);
+	}
+}
+
 static void soc_memory_init_params(FSP_M_CONFIG *m_cfg,
 		const struct soc_intel_alderlake_config *config)
 {
-	unsigned int i;
-	uint32_t mask = 0;
 	const struct device *dev;
+	unsigned int i;
 
 	dev = pcidev_path_on_root(SA_DEVFN_IGD);
 	if (!CONFIG(SOC_INTEL_DISABLE_IGD) && is_dev_enabled(dev))
@@ -42,18 +80,6 @@ static void soc_memory_init_params(FSP_M_CONFIG *m_cfg,
 		/* Set CpuRatio to match existing MSR value */
 		m_cfg->CpuRatio = (rdmsr(MSR_FLEX_RATIO).lo >> 8) & 0xff;
 
-	for (i = 0; i < ARRAY_SIZE(config->PchPcieRpEnable); i++) {
-		if (config->PchPcieRpEnable[i])
-			mask |= (1 << i);
-	}
-	m_cfg->PcieRpEnableMask = mask;
-
-	memcpy(m_cfg->PcieClkSrcUsage, config->PcieClkSrcUsage,
-		sizeof(config->PcieClkSrcUsage));
-
-	memcpy(m_cfg->PcieClkSrcClkReq, config->PcieClkSrcClkReq,
-		sizeof(config->PcieClkSrcClkReq));
-
 	m_cfg->PrmrrSize = get_valid_prmrr_size();
 	m_cfg->EnableC6Dram = config->enable_c6dram;
 	/* Disable BIOS Guard */
@@ -116,6 +142,27 @@ static void soc_memory_init_params(FSP_M_CONFIG *m_cfg,
 	m_cfg->PchHdaIDispLinkFrequency = config->PchHdaIDispLinkFrequency;
 	m_cfg->PchHdaIDispCodecDisconnect = config->PchHdaIDispCodecDisconnect;
 
+	/* Disable all PCIe clock sources by default. And set RP irrelevant clock. */
+	for (i = 0; i < CONFIG_MAX_PCIE_CLOCK_SRC; i++) {
+		if (config->pcie_clk_config_flag[i] & PCIE_CLK_FREE_RUNNING)
+			m_cfg->PcieClkSrcUsage[i] = FSP_CLK_FREE_RUNNING;
+		else if (config->pcie_clk_config_flag[i] & PCIE_CLK_LAN)
+			m_cfg->PcieClkSrcUsage[i] = FSP_CLK_LAN;
+		else
+			m_cfg->PcieClkSrcUsage[i] = FSP_CLK_NOTUSED;
+		m_cfg->PcieClkSrcClkReq[i] = FSP_CLK_NOTUSED;
+	}
+
+	/* PCIE ports */
+	m_cfg->PcieRpEnableMask = pcie_rp_enable_mask(get_pch_pcie_rp_table());
+	pcie_rp_init(m_cfg, m_cfg->PcieRpEnableMask, PCH_PCIE_RP, config->pch_pcie_rp,
+			CONFIG_MAX_PCH_ROOT_PORTS);
+
+	/* CPU PCIE ports */
+	m_cfg->CpuPcieRpEnableMask = pcie_rp_enable_mask(get_cpu_pcie_rp_table());
+	pcie_rp_init(m_cfg, m_cfg->CpuPcieRpEnableMask, CPU_PCIE_RP, config->cpu_pcie_rp,
+			CONFIG_MAX_CPU_ROOT_PORTS);
+
 	/* ISH */
 	dev = pcidev_path_on_root(PCH_DEVFN_ISH);
 	m_cfg->PchIshEnable = is_dev_enabled(dev);
@@ -156,13 +203,6 @@ static void soc_memory_init_params(FSP_M_CONFIG *m_cfg,
 	/* Skip CPU replacement check */
 	m_cfg->SkipCpuReplacementCheck = !config->CpuReplacementCheck;
 
-	mask = 0;
-	for (i = 0; i < ARRAY_SIZE(config->CpuPcieRpEnable); i++) {
-		if (config->CpuPcieRpEnable[i])
-			mask |= (1 << i);
-	}
-	m_cfg->CpuPcieRpEnableMask = mask;
-
 	m_cfg->TmeEnable = CONFIG(INTEL_TME);
 
 	/* Skip GPIO configuration from FSP */