soc/mediatek/mt8196: Add tracker driver
Tracker is a debugging tool, including AP/INFRA/PERI tracker. When bus
timeout occurs, the system reboots and latches some values which could
be used for debug.
Rename VLPCFG_BASE to VLP_CFG_BASE.
TEST=Build pass, When we encounter a bus hang and HW watchdog triggers
a reset to the platform, the tracker will print the
latched information:
[INFO ] **Dump %s aw debug register start**
[INFO ] xxxxxx, 0x1c600000, 0x0, 63
This means that the 63rd entry latch accessing 0x1c600000 has a bus
timeout.
BUG=b:317009620
Signed-off-by: Xiwen Shao <xiwen.shao@mediatek.corp-partner.google.com>
Change-Id: Ib9784a370acec45ce36a800f3955b9cf96651298
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84929
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
diff --git a/src/soc/mediatek/mt8196/Makefile.mk b/src/soc/mediatek/mt8196/Makefile.mk
index 13ba5c3..2af541f 100644
--- a/src/soc/mediatek/mt8196/Makefile.mk
+++ b/src/soc/mediatek/mt8196/Makefile.mk
@@ -19,6 +19,7 @@
bootblock-y += ../common/mmu_operations.c
bootblock-y += mtcmos.c
bootblock-$(CONFIG_PCI) += ../common/pcie.c pcie.c
+bootblock-y += tracker.c
bootblock-y += ../common/wdt.c ../common/wdt_req.c wdt.c
romstage-y += ../common/cbmem.c
diff --git a/src/soc/mediatek/mt8196/bootblock.c b/src/soc/mediatek/mt8196/bootblock.c
index d675a5a..95555d1 100644
--- a/src/soc/mediatek/mt8196/bootblock.c
+++ b/src/soc/mediatek/mt8196/bootblock.c
@@ -8,12 +8,14 @@
#include <soc/mmu_operations.h>
#include <soc/pll.h>
#include <soc/spm_mtcmos.h>
+#include <soc/tracker.h>
#include <soc/wdt.h>
void bootblock_soc_init(void)
{
booker_init();
mtk_mmu_init();
+ bustracker_init();
lastbus_init();
mtk_wdt_init();
mt_pll_init();
diff --git a/src/soc/mediatek/mt8196/include/soc/addressmap.h b/src/soc/mediatek/mt8196/include/soc/addressmap.h
index 3de16fd..dc21f60 100644
--- a/src/soc/mediatek/mt8196/include/soc/addressmap.h
+++ b/src/soc/mediatek/mt8196/include/soc/addressmap.h
@@ -143,7 +143,7 @@
APINFRA_SSR_AO_DEBUG_BASE = IO_PHYS + 0x080F1000,
AUDIO_BASE = IO_PHYS + 0x0A110000,
VLP_AO_BASE = IO_PHYS + 0x0C000000,
- VLPCFG_BASE = IO_PHYS + 0x0C001000,
+ VLP_CFG_BASE = IO_PHYS + 0x0C001000,
SPM_BASE = IO_PHYS + 0x0C004000,
SPM_PBUS_BASE = IO_PHYS + 0x0C00D000,
RGU_BASE = IO_PHYS + 0x0C010000,
diff --git a/src/soc/mediatek/mt8196/include/soc/tracker.h b/src/soc/mediatek/mt8196/include/soc/tracker.h
new file mode 100644
index 0000000..c82ee83
--- /dev/null
+++ b/src/soc/mediatek/mt8196/include/soc/tracker.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
+
+#ifndef SOC_MEDIATEK_MT8196_TRACKER_H
+#define SOC_MEDIATEK_MT8196_TRACKER_H
+
+#include <soc/tracker_common.h>
+#include <stdint.h>
+
+#define BUS_DBG_CON 0x000
+#define BUS_TRACE_CON_AO_PRESCALE 0x8f8
+#define BUS_TRACE_CON_AO_1_PRESCALE 0x9f8
+#define VLP_TRACE_CON_AO_PRESCALE 0x114
+#define BUS_TRACE_CON_1 0x800
+#define BUS_TRACE_CON_AO_1 0x8FC
+#define BUS_TRACE_CON_2 0x900
+#define BUS_TRACE_CON_AO_2 0x9FC
+#define VLP_CON_AO 0x30C
+#define BUS_TRACE_EN 16
+
+#define SYS_TRACK_ENTRY 64
+#define INFRA_ENTRY_NUM 32
+#define VLP_ENTRY_NUM 4
+
+#define AR_TRACK_LOG_OFFSET 0x0200
+#define AR_ENTRY_ID_OFFSET 0x0300
+#define AR_TRACK_L_OFFSET 0x0400
+#define AR_TRACK_H_OFFSET 0x0600
+#define AW_TRACK_LOG_OFFSET 0x0800
+#define AW_ENTRY_ID_OFFSET 0x0900
+#define AW_TRACK_L_OFFSET 0x0A00
+#define AW_TRACK_H_OFFSET 0x0C00
+
+#define BUSTRACKER_TIMEOUT 0x300
+
+enum {
+ TRACKER_SYSTRACKER = 0,
+ TRACKER_INFRATRACKER,
+ TRACKER_VLPSYSTRACKER,
+ TRACKER_NUM,
+};
+
+#endif
diff --git a/src/soc/mediatek/mt8196/tracker.c b/src/soc/mediatek/mt8196/tracker.c
new file mode 100644
index 0000000..1fc03b99
--- /dev/null
+++ b/src/soc/mediatek/mt8196/tracker.c
@@ -0,0 +1,129 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <commonlib/bsd/helpers.h>
+#include <console/console.h>
+#include <device/mmio.h>
+#include <soc/addressmap.h>
+#include <soc/tracker.h>
+
+/*
+ * for systracker:
+ * offset[0] dump from offset 0x100 ~ 0x2F8
+ * offset[1] dump from offset 0x300 ~ 0x4FC
+ *
+ * for infra tracker:
+ * offset[0] dump from offset 0x100 ~ 0x1F8
+ * offset[1] dump from offset 0x300 ~ 0x3FC
+ *
+ * for vlpsys tracker:
+ * offset[0] dump from offset 0x100 ~ 0x2F8
+ * offset[1] dump from offset 0x300 ~ 0x4FC
+ */
+
+static const u32 offsets[] = {
+ AR_TRACK_LOG_OFFSET, AR_ENTRY_ID_OFFSET, AR_TRACK_L_OFFSET,
+ AR_TRACK_H_OFFSET, AW_TRACK_LOG_OFFSET, AW_ENTRY_ID_OFFSET,
+ AW_TRACK_L_OFFSET, AW_TRACK_H_OFFSET,
+};
+
+struct tracker tracker_data[TRACKER_NUM] = {
+ [TRACKER_SYSTRACKER] = {
+ .base_addr = INFRA_TRACKER_BASE,
+ .timeout = BUS_DBG_CON_TIMEOUT,
+ .entry = SYS_TRACK_ENTRY,
+ .offsets = offsets,
+ .offsets_size = ARRAY_SIZE(offsets),
+ .str = "systracker",
+ },
+ [TRACKER_INFRATRACKER] = {
+ .base_addr = INFRA_TRACKER_BASE,
+ .timeout = BUS_DBG_CON_TIMEOUT,
+ .entry = INFRA_ENTRY_NUM,
+ .offsets = offsets,
+ .offsets_size = ARRAY_SIZE(offsets),
+ .str = "infra_tracker",
+ },
+ [TRACKER_VLPSYSTRACKER] = {
+ .base_addr = VLP_TRACKER_BASE,
+ .timeout = BUS_DBG_CON_TIMEOUT,
+ .entry = VLP_ENTRY_NUM,
+ .offsets = offsets,
+ .offsets_size = ARRAY_SIZE(offsets),
+ .str = "vlp_tracker",
+ },
+};
+
+void tracker_setup(void)
+{
+ u32 val;
+ /*
+ * Set infra/peri tracker timeout.
+ * timeout = clock_in_mhz / 15 * timeout_in_us
+ *
+ * timeout: 10ms
+ * ap tracker clock: 26MHz
+ * infra tracker clock: 26MHz
+ * vlp tracker clock: 26MHz
+ */
+ val = 26 / 15 * 10000;
+
+ write32p(BUS_TRACE_MONITOR_BASE + BUS_TRACE_CON_AO_PRESCALE, val);
+ write32p(BUS_TRACE_MONITOR_BASE + BUS_TRACE_CON_AO_1_PRESCALE, val);
+ write32p(VLP_CFG_BASE + VLP_TRACE_CON_AO_PRESCALE, val);
+ /*
+ * Enable infra/peri tracker.
+ * bit[0] - BUS_DBG_EN
+ * bit[1] - TIMEOUT_EN
+ * bit[2] - SLV_ERR_EN
+ * bit[13] - HALT_ON_TIMEOUT_EN
+ * bit[14] - BUS_OT_WEN_CTRL
+ */
+ val = BIT(0) | BIT(1) | BIT(2) | BIT(13) | BIT(14);
+ write32p(VLP_AO_BASE + VLP_CON_AO, val);
+ write32p(BUS_TRACE_MONITOR_BASE + BUS_TRACE_CON_AO_1, val);
+ write32p(BUS_TRACE_MONITOR_BASE + BUS_TRACE_CON_AO_2, val);
+}
+
+static void tracker_dump_data(void)
+{
+ u64 reg_entry;
+ int i, j;
+ uintptr_t reg_log, reg_id, reg_low, reg_high;
+ struct tracker *tra;
+
+ for (j = 0; j < TRACKER_NUM; j++) {
+ tra = &tracker_data[j];
+
+ if (!(read32p(tra->base_addr) & tra->timeout))
+ continue;
+ printk(BIOS_INFO, "**Dump %s ar debug register start**\n", tra->str);
+ for (i = 0; i < tra->entry; i++) {
+ reg_log = tra->base_addr + tra->offsets[0] + i * 4;
+ reg_id = tra->base_addr + tra->offsets[1] + i * 4;
+ reg_low = tra->base_addr + tra->offsets[2] + i * 4;
+ reg_high = tra->base_addr + tra->offsets[3] + i * 4;
+ reg_entry = ((u64)read32p(reg_high)) << 32 | read32p(reg_low);
+ printk(BIOS_INFO, "%#lx:%#x:%#x:%#x:%#x:%#llx\n",
+ reg_low, read32p(reg_log), read32p(reg_id), read32p(reg_low),
+ read32p(reg_high), reg_entry);
+ }
+ printk(BIOS_INFO, "**Dump %s aw debug register start**\n", tra->str);
+ for (i = 0; i < tra->entry; i++) {
+ reg_log = tra->base_addr + tra->offsets[4] + i * 4;
+ reg_id = tra->base_addr + tra->offsets[5] + i * 4;
+ reg_low = tra->base_addr + tra->offsets[6] + i * 4;
+ reg_high = tra->base_addr + tra->offsets[7] + i * 4;
+ reg_entry = ((u64)read32p(reg_high)) << 32 | read32p(reg_low);
+ printk(BIOS_INFO, "%#lx:%#x:%#x:%#x:%#x:%#llx\n",
+ reg_low, read32p(reg_log), read32p(reg_id), read32p(reg_low),
+ read32p(reg_high), reg_entry);
+ }
+ printk(BIOS_INFO, "**Dump %s debug register end**\n", tra->str);
+ }
+}
+
+void bustracker_init(void)
+{
+ tracker_dump_data();
+ tracker_setup();
+}
