coresight-etm: add CoreSight ETM/PTM driver
This driver manages CoreSight ETM (Embedded Trace Macrocell) that
supports processor tracing. Currently supported version are ARM
ETMv3.x and PTM1.x.
Signed-off-by: Pratik Patel <pratikp@codeaurora.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
coresight-etm3x: adding missing error checking
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/coresight/coresight-etm.h b/drivers/coresight/coresight-etm.h
new file mode 100644
index 0000000..501c5fa
--- /dev/null
+++ b/drivers/coresight/coresight-etm.h
@@ -0,0 +1,251 @@
+/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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 _CORESIGHT_CORESIGHT_ETM_H
+#define _CORESIGHT_CORESIGHT_ETM_H
+
+#include <linux/spinlock.h>
+#include "coresight-priv.h"
+
+/*
+ * Device registers:
+ * 0x000 - 0x2FC: Trace registers
+ * 0x300 - 0x314: Management registers
+ * 0x318 - 0xEFC: Trace registers
+ *
+ * Coresight registers
+ * 0xF00 - 0xF9C: Management registers
+ * 0xFA0 - 0xFA4: Management registers in PFTv1.0
+ * Trace registers in PFTv1.1
+ * 0xFA8 - 0xFFC: Management registers
+ */
+
+/* Trace registers (0x000-0x2FC) */
+#define ETMCR 0x000
+#define ETMCCR 0x004
+#define ETMTRIGGER 0x008
+#define ETMSR 0x010
+#define ETMSCR 0x014
+#define ETMTSSCR 0x018
+#define ETMTECR2 0x01c
+#define ETMTEEVR 0x020
+#define ETMTECR1 0x024
+#define ETMFFLR 0x02c
+#define ETMACVRn(n) (0x040 + (n * 4))
+#define ETMACTRn(n) (0x080 + (n * 4))
+#define ETMCNTRLDVRn(n) (0x140 + (n * 4))
+#define ETMCNTENRn(n) (0x150 + (n * 4))
+#define ETMCNTRLDEVRn(n) (0x160 + (n * 4))
+#define ETMCNTVRn(n) (0x170 + (n * 4))
+#define ETMSQ12EVR 0x180
+#define ETMSQ21EVR 0x184
+#define ETMSQ23EVR 0x188
+#define ETMSQ31EVR 0x18c
+#define ETMSQ32EVR 0x190
+#define ETMSQ13EVR 0x194
+#define ETMSQR 0x19c
+#define ETMEXTOUTEVRn(n) (0x1a0 + (n * 4))
+#define ETMCIDCVRn(n) (0x1b0 + (n * 4))
+#define ETMCIDCMR 0x1bc
+#define ETMIMPSPEC0 0x1c0
+#define ETMIMPSPEC1 0x1c4
+#define ETMIMPSPEC2 0x1c8
+#define ETMIMPSPEC3 0x1cc
+#define ETMIMPSPEC4 0x1d0
+#define ETMIMPSPEC5 0x1d4
+#define ETMIMPSPEC6 0x1d8
+#define ETMIMPSPEC7 0x1dc
+#define ETMSYNCFR 0x1e0
+#define ETMIDR 0x1e4
+#define ETMCCER 0x1e8
+#define ETMEXTINSELR 0x1ec
+#define ETMTESSEICR 0x1f0
+#define ETMEIBCR 0x1f4
+#define ETMTSEVR 0x1f8
+#define ETMAUXCR 0x1fc
+#define ETMTRACEIDR 0x200
+#define ETMVMIDCVR 0x240
+/* Management registers (0x300-0x314) */
+#define ETMOSLAR 0x300
+#define ETMOSLSR 0x304
+#define ETMOSSRR 0x308
+#define ETMPDCR 0x310
+#define ETMPDSR 0x314
+#define ETM_MAX_ADDR_CMP 16
+#define ETM_MAX_CNTR 4
+#define ETM_MAX_CTXID_CMP 3
+
+/* Register definition */
+/* ETMCR - 0x00 */
+#define ETMCR_PWD_DWN BIT(0)
+#define ETMCR_STALL_MODE BIT(7)
+#define ETMCR_ETM_PRG BIT(10)
+#define ETMCR_ETM_EN BIT(11)
+#define ETMCR_CYC_ACC BIT(12)
+#define ETMCR_CTXID_SIZE (BIT(14)|BIT(15))
+#define ETMCR_TIMESTAMP_EN BIT(28)
+/* ETMCCR - 0x04 */
+#define ETMCCR_FIFOFULL BIT(23)
+/* ETMPDCR - 0x310 */
+#define ETMPDCR_PWD_UP BIT(3)
+/* ETMTECR1 - 0x024 */
+#define ETMTECR1_ADDR_COMP_1 BIT(0)
+#define ETMTECR1_INC_EXC BIT(24)
+#define ETMTECR1_START_STOP BIT(25)
+/* ETMCCER - 0x1E8 */
+#define ETMCCER_TIMESTAMP BIT(22)
+
+#define ETM_MODE_EXCLUDE BIT(0)
+#define ETM_MODE_CYCACC BIT(1)
+#define ETM_MODE_STALL BIT(2)
+#define ETM_MODE_TIMESTAMP BIT(3)
+#define ETM_MODE_CTXID BIT(4)
+#define ETM_MODE_ALL 0x1f
+
+#define ETM_SQR_MASK 0x3
+#define ETM_TRACEID_MASK 0x3f
+#define ETM_EVENT_MASK 0x1ffff
+#define ETM_SYNC_MASK 0xfff
+#define ETM_ALL_MASK 0xffffffff
+
+#define ETMSR_PROG_BIT 1
+#define ETM_SEQ_STATE_MAX_VAL (0x2)
+#define PORT_SIZE_MASK (GENMASK(21, 21) | GENMASK(6, 4))
+
+#define ETM_HARD_WIRE_RES_A /* Hard wired, always true */ \
+ ((0x0f << 0) | \
+ /* Resource index A */ \
+ (0x06 << 4))
+
+#define ETM_ADD_COMP_0 /* Single addr comparator 1 */ \
+ ((0x00 << 7) | \
+ /* Resource index B */ \
+ (0x00 << 11))
+
+#define ETM_EVENT_NOT_A BIT(14) /* NOT(A) */
+
+#define ETM_DEFAULT_EVENT_VAL (ETM_HARD_WIRE_RES_A | \
+ ETM_ADD_COMP_0 | \
+ ETM_EVENT_NOT_A)
+/**
+ * struct etm_drvdata - specifics associated to an ETM component
+ * @base: memory mapped base address for this component.
+ * @dev: the device entity associated to this component.
+ * @csdev: component vitals needed by the framework.
+ * @clk: the clock this component is associated to.
+ * @spinlock: only one at a time pls.
+ * @cpu: the cpu this component is affined to.
+ * @port_size: port size as reported by ETMCR bit 4-6 and 21.
+ * @arch: ETM/PTM version number.
+ * @use_cpu14: true if management registers need to be accessed via CP14.
+ * @enable: is this ETM/PTM currently tracing.
+ * @sticky_enable: true if ETM base configuration has been done.
+ * @boot_enable:true if we should start tracing at boot time.
+ * @os_unlock: true if access to management registers is allowed.
+ * @nr_addr_cmp:Number of pairs of address comparators as found in ETMCCR.
+ * @nr_cntr: Number of counters as found in ETMCCR bit 13-15.
+ * @nr_ext_inp: Number of external input as found in ETMCCR bit 17-19.
+ * @nr_ext_out: Number of external output as found in ETMCCR bit 20-22.
+ * @nr_ctxid_cmp: Number of contextID comparators as found in ETMCCR bit 24-25.
+ * @etmccr: value of register ETMCCR.
+ * @etmccer: value of register ETMCCER.
+ * @traceid: value of the current ID for this component.
+ * @mode: controls various modes supported by this ETM/PTM.
+ * @ctrl: used in conjunction with @mode.
+ * @trigger_event: setting for register ETMTRIGGER.
+ * @startstop_ctrl: setting for register ETMTSSCR.
+ * @enable_event: setting for register ETMTEEVR.
+ * @enable_ctrl1: setting for register ETMTECR1.
+ * @fifofull_level: setting for register ETMFFLR.
+ * @addr_idx: index for the address comparator selection.
+ * @addr_val: value for address comparator register.
+ * @addr_acctype: access type for address comparator register.
+ * @addr_type: current status of the comparator register.
+ * @cntr_idx: index for the counter register selection.
+ * @cntr_rld_val: reload value of a counter register.
+ * @cntr_event: control for counter enable register.
+ * @cntr_rld_event: value for counter reload event register.
+ * @cntr_val: counter value register.
+ * @seq_12_event: event causing the transition from 1 to 2.
+ * @seq_21_event: event causing the transition from 2 to 1.
+ * @seq_23_event: event causing the transition from 2 to 3.
+ * @seq_31_event: event causing the transition from 3 to 1.
+ * @seq_32_event: event causing the transition from 3 to 2.
+ * @seq_13_event: event causing the transition from 1 to 3.
+ * @seq_curr_state: current value of the sequencer register.
+ * @ctxid_idx: index for the context ID registers.
+ * @ctxid_val: value for the context ID to trigger on.
+ * @ctxid_mask: mask applicable to all the context IDs.
+ * @sync_freq: Synchronisation frequency.
+ * @timestamp_event: Defines an event that requests the insertion
+ of a timestamp into the trace stream.
+ */
+struct etm_drvdata {
+ void __iomem *base;
+ struct device *dev;
+ struct coresight_device *csdev;
+ struct clk *clk;
+ spinlock_t spinlock;
+ int cpu;
+ int port_size;
+ u8 arch;
+ bool use_cp14;
+ bool enable;
+ bool sticky_enable;
+ bool boot_enable;
+ bool os_unlock;
+ u8 nr_addr_cmp;
+ u8 nr_cntr;
+ u8 nr_ext_inp;
+ u8 nr_ext_out;
+ u8 nr_ctxid_cmp;
+ u32 etmccr;
+ u32 etmccer;
+ u32 traceid;
+ u32 mode;
+ u32 ctrl;
+ u32 trigger_event;
+ u32 startstop_ctrl;
+ u32 enable_event;
+ u32 enable_ctrl1;
+ u32 fifofull_level;
+ u8 addr_idx;
+ u32 addr_val[ETM_MAX_ADDR_CMP];
+ u32 addr_acctype[ETM_MAX_ADDR_CMP];
+ u32 addr_type[ETM_MAX_ADDR_CMP];
+ u8 cntr_idx;
+ u32 cntr_rld_val[ETM_MAX_CNTR];
+ u32 cntr_event[ETM_MAX_CNTR];
+ u32 cntr_rld_event[ETM_MAX_CNTR];
+ u32 cntr_val[ETM_MAX_CNTR];
+ u32 seq_12_event;
+ u32 seq_21_event;
+ u32 seq_23_event;
+ u32 seq_31_event;
+ u32 seq_32_event;
+ u32 seq_13_event;
+ u32 seq_curr_state;
+ u8 ctxid_idx;
+ u32 ctxid_val[ETM_MAX_CTXID_CMP];
+ u32 ctxid_mask;
+ u32 sync_freq;
+ u32 timestamp_event;
+};
+
+enum etm_addr_type {
+ ETM_ADDR_TYPE_NONE,
+ ETM_ADDR_TYPE_SINGLE,
+ ETM_ADDR_TYPE_RANGE,
+ ETM_ADDR_TYPE_START,
+ ETM_ADDR_TYPE_STOP,
+};
+#endif