sc7280: Add CPUCP firmware support

CPUCP is CPUSS Control Processor. It refers to the firmware for control
CPUSS active power management.

BUG=b:182963902
TEST=Validated on qualcomm sc7280 development board

Change-Id: Idac22c8cb231658616999bc577bdf49f9aa7ae74
Signed-off-by: Ravi Kumar Bokka <rbokka@codeaurora.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49768
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

6 files changed, 100 insertions, 3 deletions

diff --git a/src/soc/qualcomm/sc7280/Makefile.inc b/src/soc/qualcomm/sc7280/Makefile.inc
index 37ed21eaa3dc..72fb57fcaf58 100644
--- a/src/soc/qualcomm/sc7280/Makefile.inc
+++ b/src/soc/qualcomm/sc7280/Makefile.inc
@@ -37,6 +37,7 @@ ramstage-y += soc.c
 ramstage-y += cbmem.c
 ramstage-$(CONFIG_DRIVERS_UART) += ../common/qupv3_uart.c
 ramstage-y += ../common/aop_load_reset.c
+ramstage-y += cpucp_load_reset.c
 
 ################################################################################
 
@@ -112,6 +113,14 @@ $(AOP_CBFS)-compression := $(CBFS_COMPRESS_FLAG)
 cbfs-files-y += $(AOP_CBFS)
 
 ################################################################################
+CPUCP_FILE := $(SC7280_BLOB)/cpucp/cpucp.elf
+CPUCP_CBFS := $(CONFIG_CBFS_PREFIX)/cpucp
+$(CPUCP_CBFS)-file := $(CPUCP_FILE)
+$(CPUCP_CBFS)-type := payload
+$(CPUCP_CBFS)-compression := $(CBFS_COMPRESS_FLAG)
+cbfs-files-y += $(CPUCP_CBFS)
+
+################################################################################
 SHRM_FILE := $(SC7280_BLOB)/shrm/shrm.elf
 SHRM_CBFS := $(CONFIG_CBFS_PREFIX)/shrm
 $(SHRM_CBFS)-file := $(SHRM_FILE)
diff --git a/src/soc/qualcomm/sc7280/cpucp_load_reset.c b/src/soc/qualcomm/sc7280/cpucp_load_reset.c
new file mode 100644
index 000000000000..48b47073acfb
--- /dev/null
+++ b/src/soc/qualcomm/sc7280/cpucp_load_reset.c
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <assert.h>
+#include <delay.h>
+#include <cbfs.h>
+#include <console/console.h>
+#include <soc/mmu.h>
+#include <soc/cpucp.h>
+#include <soc/clock.h>
+#include <device/mmio.h>
+#include <timer.h>
+
+void cpucp_prepare(void)
+{
+	/* allow NS access to EPSS memory*/
+	setbits32(&epss_top->access_override, 0x1);
+
+	/* Enable subsystem clock. Required for CPUCP PDMEM access*/
+	setbits32(&epss_fast->epss_muc_clk_ctrl, 0x1);
+	if (!wait_ms(300, ((read32(&epss_fast->epss_muc_clk_ctrl) & 0x1) != 0x1)))
+		printk(BIOS_ERR, "%s: cannot get CPUCP PDMEM access.\n", __func__);
+}
+
+void cpucp_fw_load_reset(void)
+{
+	struct prog cpucp_fw_prog =
+		PROG_INIT(PROG_PAYLOAD, CONFIG_CBFS_PREFIX "/cpucp");
+
+	cpucp_prepare();
+
+	if (!selfload(&cpucp_fw_prog))
+		die("SOC image: CPUCP load failed");
+
+	printk(BIOS_DEBUG, "SOC:CPUCP image loaded successfully.\n");
+}
diff --git a/src/soc/qualcomm/sc7280/include/soc/addressmap.h b/src/soc/qualcomm/sc7280/include/soc/addressmap.h
index 599d03f7b6fe..8515a048f8d8 100644
--- a/src/soc/qualcomm/sc7280/include/soc/addressmap.h
+++ b/src/soc/qualcomm/sc7280/include/soc/addressmap.h
@@ -55,4 +55,7 @@
 #define QUP_WRAP1_BASE			0x00AC0000
 #define QUP_1_GSI_BASE			0x00A04000
 
+#define EPSSTOP_EPSS_TOP		0x18598000
+#define EPSSFAST_BASE_ADDR		0x18580000
+
 #endif /*  __SOC_QUALCOMM_SC7280_ADDRESS_MAP_H__ */
diff --git a/src/soc/qualcomm/sc7280/include/soc/cpucp.h b/src/soc/qualcomm/sc7280/include/soc/cpucp.h
new file mode 100644
index 000000000000..37ae7d2b5389
--- /dev/null
+++ b/src/soc/qualcomm/sc7280/include/soc/cpucp.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _SOC_QUALCOMM_SC7280_CPUCP_H__
+#define _SOC_QUALCOMM_SC7280_CPUCP_H__
+
+#include <soc/addressmap.h>
+
+struct epsstop_epss_top {
+	uint32_t access_override;
+	uint32_t global_enable;
+	uint32_t trace_bus_ctrl;
+	uint32_t debug_bus_ctrl;
+	uint32_t muc_hang_det_ctrl;
+	uint32_t muc_hang_irq_sts;
+	uint32_t muc_hang_count_threshold;
+	uint32_t muc_hang_count_sts;
+	uint32_t muc_hang_det_sts;
+	uint32_t l3_voting_en;
+};
+
+struct epssfast_epss_fast {
+	uint32_t epss_muc_clk_ctrl;
+	uint32_t muc_rvbar;
+	uint32_t muc_rvbar_ctrl;
+	uint32_t muc_non_secure_dmem_start_addr;
+	uint32_t muc_non_secure_dmem_end_addr;
+	uint32_t reserved_1[2];
+	uint32_t cpr_data_fifo[4];
+	uint32_t reserved_2[4];
+	uint32_t pll_data_fifo[4];
+	uint32_t reserved_3[4];
+	uint32_t gfmux_data_fifo_1[4];
+	uint32_t cpu_pcu_spare_irq_status;
+	uint32_t cpu_pcu_spare_irq_clr;
+	uint32_t cpu_pcu_spare_wait_event;
+	uint32_t seq_mem[256];
+};
+
+static struct epsstop_epss_top *const epss_top = (void *)EPSSTOP_EPSS_TOP;
+static struct epssfast_epss_fast *const epss_fast = (void *)EPSSFAST_BASE_ADDR;
+
+void cpucp_fw_load_reset(void);
+void cpucp_prepare(void);
+
+#endif  // _SOC_QUALCOMM_SC7280_CPUCP_H__
diff --git a/src/soc/qualcomm/sc7280/memlayout.ld b/src/soc/qualcomm/sc7280/memlayout.ld
index 620e5b55db9d..57cdb59cc363 100644
--- a/src/soc/qualcomm/sc7280/memlayout.ld
+++ b/src/soc/qualcomm/sc7280/memlayout.ld
@@ -54,9 +54,10 @@ SECTIONS
 	/* Various hardware/software subsystems make use of this area */
 	REGION(dram_aop,  0x80800000, 0x080000, 0x1000)
 	REGION(dram_soc,  0x80900000, 0x200000, 0x1000)
-	BL31(0x80B00000, 1M)
+	REGION(dram_cpucp,0x80B00000, 0x100000, 0x1000)
 	REGION(dram_wlan, 0x80C00000, 0xC00000, 0x1000)
 	REGION(dram_wpss, 0x9AE00000, 0x1900000, 0x1000)
 	POSTRAM_CBFS_CACHE(0x9F800000, 16M)
 	RAMSTAGE(0xA0800000, 16M)
+	BL31(0xC0000000, 1M)
 }
diff --git a/src/soc/qualcomm/sc7280/soc.c b/src/soc/qualcomm/sc7280/soc.c
index ff2b7cc65045..8d27a46cee86 100644
--- a/src/soc/qualcomm/sc7280/soc.c
+++ b/src/soc/qualcomm/sc7280/soc.c
@@ -5,6 +5,7 @@
 #include <soc/mmu_common.h>
 #include <soc/symbols_common.h>
 #include <soc/aop_common.h>
+#include <soc/cpucp.h>
 
 static void soc_read_resources(struct device *dev)
 {
@@ -13,16 +14,19 @@ static void soc_read_resources(struct device *dev)
 	reserved_ram_resource(dev, 1, (uintptr_t)_dram_soc / KiB,
 				REGION_SIZE(dram_soc) / KiB);
 	reserved_ram_resource(dev, 2, (uintptr_t)_dram_wlan / KiB,
-                               REGION_SIZE(dram_wlan) / KiB);
+				REGION_SIZE(dram_wlan) / KiB);
 	reserved_ram_resource(dev, 3, (uintptr_t)_dram_wpss / KiB,
-                               REGION_SIZE(dram_wpss) / KiB);
+				REGION_SIZE(dram_wpss) / KiB);
 	reserved_ram_resource(dev, 4, (uintptr_t)_dram_aop / KiB,
 				REGION_SIZE(dram_aop) / KiB);
+	reserved_ram_resource(dev, 5, (uintptr_t)_dram_cpucp / KiB,
+				REGION_SIZE(dram_cpucp) / KiB);
 }
 
 static void soc_init(struct device *dev)
 {
 	aop_fw_load_reset();
+	cpucp_fw_load_reset();
 }
 
 static struct device_operations soc_ops = {