summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAndrey Petrov <andrey.petrov@intel.com>2016-07-14 17:16:35 -0700
committerAaron Durbin <adurbin@chromium.org>2016-07-19 20:19:51 +0200
commitfcd51ffae86752f2794e1e5998b84f7119b7f091 (patch)
treec7e90d325d36b276c95be4c8407b9fb339f1d354
parent35d42c75648dee229dbf0a8adc0ebfa2ddf81dd4 (diff)
soc/intel/apollolake: Add basic HECI support
Add functions to read Host Firmware Status register and a helper function to determine if CSE is ready. BUG=chrome-os-partner:55055 TEST=none Change-Id: If511a51c04f7e59427d7952fa67b61060e2be404 Signed-off-by: Andrey Petrov <andrey.petrov@intel.com> Reviewed-on: https://review.coreboot.org/15713 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
-rw-r--r--src/soc/intel/apollolake/Makefile.inc4
-rw-r--r--src/soc/intel/apollolake/heci.c36
-rw-r--r--src/soc/intel/apollolake/include/soc/heci.h43
-rw-r--r--src/soc/intel/apollolake/include/soc/pci_devs.h3
4 files changed, 86 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/Makefile.inc b/src/soc/intel/apollolake/Makefile.inc
index c44fc464d5..fda3523454 100644
--- a/src/soc/intel/apollolake/Makefile.inc
+++ b/src/soc/intel/apollolake/Makefile.inc
@@ -13,6 +13,7 @@ bootblock-y += bootblock/cache_as_ram.S
bootblock-y += bootblock/bootblock.c
bootblock-y += car.c
bootblock-y += gpio.c
+bootblock-y += heci.c
bootblock-y += itss.c
bootblock-y += lpc_lib.c
bootblock-y += mmap_boot.c
@@ -24,6 +25,7 @@ bootblock-$(CONFIG_SOC_UART_DEBUG) += uart_early.c
romstage-y += car.c
romstage-$(CONFIG_PLATFORM_USES_FSP2_0) += romstage.c
romstage-y += gpio.c
+romstage-y += heci.c
romstage-y += i2c_early.c
romstage-y += itss.c
romstage-$(CONFIG_SOC_UART_DEBUG) += uart_early.c
@@ -49,6 +51,7 @@ ramstage-y += chip.c
ramstage-y += dsp.c
ramstage-y += gpio.c
ramstage-y += graphics.c
+ramstage-y += heci.c
ramstage-y += i2c.c
ramstage-y += itss.c
ramstage-$(CONFIG_SOC_UART_DEBUG) += uart_early.c
@@ -77,6 +80,7 @@ postcar-y += tsc_freq.c
verstage-y += car.c
verstage-y += i2c_early.c
+verstage-y += heci.c
verstage-y += memmap.c
verstage-y += mmap_boot.c
verstage-$(CONFIG_SOC_UART_DEBUG) += uart_early.c
diff --git a/src/soc/intel/apollolake/heci.c b/src/soc/intel/apollolake/heci.c
new file mode 100644
index 0000000000..468589531c
--- /dev/null
+++ b/src/soc/intel/apollolake/heci.c
@@ -0,0 +1,36 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Intel Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <device/device.h>
+#include <device/pci_def.h>
+#include <device/pci_ops.h>
+#include <soc/heci.h>
+#include <soc/pci_devs.h>
+
+uint32_t heci_fw_sts(void)
+{
+ return pci_read_config32(CSE_DEV, REG_SEC_FW_STS0);
+}
+
+bool heci_cse_normal(void)
+{
+ return ((heci_fw_sts() & MASK_SEC_STATUS) == SEC_STATE_NORMAL);
+}
+
+bool heci_cse_done(void)
+{
+ return (!!(heci_fw_sts() & MASK_SEC_FIRMWARE_COMPLETE));
+}
diff --git a/src/soc/intel/apollolake/include/soc/heci.h b/src/soc/intel/apollolake/include/soc/heci.h
new file mode 100644
index 0000000000..1151321445
--- /dev/null
+++ b/src/soc/intel/apollolake/include/soc/heci.h
@@ -0,0 +1,43 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Intel Corp.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _SOC_APOLLOLAKE_HECI_H_
+#define _SOC_APOLLOLAKE_HECI_H_
+
+enum sec_status {
+ SEC_STATE_RESET = 0,
+ SEC_STATE_INIT,
+ SEC_STATE_RECOVERY,
+ SEC_STATE_UNKNOWN0,
+ SEC_STATE_UNKNOWN1,
+ SEC_STATE_NORMAL,
+ SEC_STATE_DISABLE_WAIT,
+ SEC_STATE_TRANSITION,
+ SEC_STATE_INVALID_CPU
+};
+
+#define REG_SEC_FW_STS0 0x40
+#define MASK_SEC_FIRMWARE_COMPLETE (1 << 9)
+#define MASK_SEC_STATUS 0xf
+
+/* Read Firmware Status register */
+uint32_t heci_fw_sts(void);
+/* Returns true if CSE is in normal status */
+bool heci_cse_normal(void);
+/* Returns true if CSE is done with whatever it was doing */
+bool heci_cse_done(void);
+
+#endif
diff --git a/src/soc/intel/apollolake/include/soc/pci_devs.h b/src/soc/intel/apollolake/include/soc/pci_devs.h
index f29784d974..b7519ed799 100644
--- a/src/soc/intel/apollolake/include/soc/pci_devs.h
+++ b/src/soc/intel/apollolake/include/soc/pci_devs.h
@@ -46,6 +46,9 @@
#define HDA_DEV _PCI_DEV(0xe, 0)
#define HDA_DEVFN _PCI_DEVFN(0xe, 0)
+#define CSE_DEV _PCI_DEV(0xf, 0)
+#define CSE_DEVFN _PCI_DEVFN(0xf, 0)
+
#define ISH_DEV _PCI_DEV(0x11, 0)
#define ISH_DEVFN _PCI_DEVFN(0x11, 0)