/
coresight-tpiu.c
1186 lines (992 loc) · 28.6 KB
/
coresight-tpiu.c
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/* Copyright (c) 2011-2015, 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.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/clk.h>
#include <linux/of_coresight.h>
#include <linux/coresight.h>
#include <linux/regulator/consumer.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/pinctrl/consumer.h>
#include "coresight-priv.h"
#include "coresight-nidnt.h"
#define tpiu_writel(drvdata, val, off) __raw_writel((val), drvdata->base + off)
#define tpiu_readl(drvdata, off) __raw_readl(drvdata->base + off)
#define TPIU_LOCK(drvdata) \
do { \
mb(); \
tpiu_writel(drvdata, 0x0, CORESIGHT_LAR); \
} while (0)
#define TPIU_UNLOCK(drvdata) \
do { \
tpiu_writel(drvdata, CORESIGHT_UNLOCK, CORESIGHT_LAR); \
mb(); \
} while (0)
#define TPIU_SUPP_PORTSZ (0x000)
#define TPIU_CURR_PORTSZ (0x004)
#define TPIU_SUPP_TRIGMODES (0x100)
#define TPIU_TRIG_CNTRVAL (0x104)
#define TPIU_TRIG_MULT (0x108)
#define TPIU_SUPP_TESTPATM (0x200)
#define TPIU_CURR_TESTPATM (0x204)
#define TPIU_TEST_PATREPCNTR (0x208)
#define TPIU_FFSR (0x300)
#define TPIU_FFCR (0x304)
#define TPIU_FSYNC_CNTR (0x308)
#define TPIU_EXTCTL_INPORT (0x400)
#define TPIU_EXTCTL_OUTPORT (0x404)
#define TPIU_ITTRFLINACK (0xEE4)
#define TPIU_ITTRFLIN (0xEE8)
#define TPIU_ITATBDATA0 (0xEEC)
#define TPIU_ITATBCTR2 (0xEF0)
#define TPIU_ITATBCTR1 (0xEF4)
#define TPIU_ITATBCTR0 (0xEF8)
#define TLMM_SDC2_HDRV_PULL_CTL (0X48)
#define TLMM_ETM_MODE (0X14)
enum tpiu_out_mode {
TPIU_OUT_MODE_NONE,
TPIU_OUT_MODE_MICTOR,
TPIU_OUT_MODE_SDC_TRACE,
TPIU_OUT_MODE_SDC_SWDUART,
TPIU_OUT_MODE_SDC_SWDTRC,
TPIU_OUT_MODE_SDC_JTAG,
TPIU_OUT_MODE_SDC_SPMI,
};
enum tpiu_set {
TPIU_SET_NONE,
TPIU_SET_A,
TPIU_SET_B,
};
struct tpiu_drvdata {
void __iomem *base;
struct device *dev;
struct coresight_device *csdev;
struct clk *clk;
struct mutex mutex;
enum tpiu_out_mode out_mode;
struct regulator *reg;
unsigned int reg_low;
unsigned int reg_high;
unsigned int reg_lpm;
unsigned int reg_hpm;
struct regulator *reg_io;
unsigned int reg_low_io;
unsigned int reg_high_io;
unsigned int reg_lpm_io;
unsigned int reg_hpm_io;
enum tpiu_set set;
struct pinctrl *tpiu_pctrl;
bool enable;
bool nidntsw;
bool nidnthw; /* Can support nidnt ps sequence */
bool nidnt_swduart;
bool nidnt_swdtrc;
bool nidnt_jtag;
bool nidnt_spmi;
};
static const char * const str_tpiu_out_mode[] = {
[TPIU_OUT_MODE_NONE] = "none",
[TPIU_OUT_MODE_MICTOR] = "mictor",
[TPIU_OUT_MODE_SDC_TRACE] = "sdc",
[TPIU_OUT_MODE_SDC_SWDUART] = "swduart",
[TPIU_OUT_MODE_SDC_SWDTRC] = "swdtrc",
[TPIU_OUT_MODE_SDC_JTAG] = "jtag",
[TPIU_OUT_MODE_SDC_SPMI] = "spmi",
};
static int nidnt_boot_hw_detect;
module_param_named(nidnt_boot_hw_detect,
nidnt_boot_hw_detect, int, S_IRUGO | S_IWUSR | S_IWGRP);
static void __tpiu_disable(struct tpiu_drvdata *drvdata);
static void __tpiu_disable_to_sdc(struct tpiu_drvdata *drvdata);
static void tpiu_flush_and_stop(struct tpiu_drvdata *drvdata)
{
int count;
uint32_t ffcr;
ffcr = tpiu_readl(drvdata, TPIU_FFCR);
ffcr |= BIT(12);
tpiu_writel(drvdata, ffcr, TPIU_FFCR);
ffcr |= BIT(6);
tpiu_writel(drvdata, ffcr, TPIU_FFCR);
/* Ensure flush completes */
for (count = TIMEOUT_US; BVAL(tpiu_readl(drvdata, TPIU_FFCR), 6) != 0
&& count > 0; count--)
udelay(1);
WARN(count == 0, "timeout while flushing TPIU, TPIU_FFCR: %#x\n",
tpiu_readl(drvdata, TPIU_FFCR));
}
static void __tpiu_enable(struct tpiu_drvdata *drvdata, uint32_t portsz,
uint32_t ffcr)
{
TPIU_UNLOCK(drvdata);
tpiu_writel(drvdata, portsz, TPIU_CURR_PORTSZ);
tpiu_writel(drvdata, ffcr, TPIU_FFCR);
TPIU_LOCK(drvdata);
}
static int __tpiu_enable_seta(struct tpiu_drvdata *drvdata)
{
int ret;
struct pinctrl *pctrl;
struct pinctrl_state *seta_pctrl;
pctrl = devm_pinctrl_get(drvdata->dev);
if (IS_ERR(pctrl)) {
dev_err(drvdata->dev, "pinctrl handle failed for seta\n");
return PTR_ERR(pctrl);
}
seta_pctrl = pinctrl_lookup_state(pctrl, "seta-pctrl");
if (IS_ERR(seta_pctrl)) {
dev_err(drvdata->dev,
"pinctrl get state failed for seta\n");
ret = PTR_ERR(seta_pctrl);
goto err;
}
ret = pinctrl_select_state(pctrl, seta_pctrl);
if (ret) {
dev_err(drvdata->dev,
"pinctrl enable state failed for seta\n");
goto err;
}
drvdata->tpiu_pctrl = pctrl;
return 0;
err:
devm_pinctrl_put(pctrl);
return ret;
}
static int __tpiu_enable_setb(struct tpiu_drvdata *drvdata)
{
int ret;
struct pinctrl *pctrl;
struct pinctrl_state *setb_pctrl;
pctrl = devm_pinctrl_get(drvdata->dev);
if (IS_ERR(pctrl)) {
dev_err(drvdata->dev, "pinctrl handle failed for setb\n");
return PTR_ERR(pctrl);
}
setb_pctrl = pinctrl_lookup_state(pctrl, "setb-pctrl");
if (IS_ERR(setb_pctrl)) {
dev_err(drvdata->dev,
"pinctrl get state failed for setb\n");
ret = PTR_ERR(setb_pctrl);
goto err;
}
ret = pinctrl_select_state(pctrl, setb_pctrl);
if (ret) {
dev_err(drvdata->dev,
"pinctrl enable state failed for setb\n");
goto err;
}
drvdata->tpiu_pctrl = pctrl;
return 0;
err:
devm_pinctrl_put(pctrl);
return ret;
}
static int __tpiu_enable_to_mictor(struct tpiu_drvdata *drvdata)
{
int ret;
if (drvdata->set == TPIU_SET_A) {
ret = __tpiu_enable_seta(drvdata);
if (ret)
return ret;
} else if (drvdata->set == TPIU_SET_B) {
ret = __tpiu_enable_setb(drvdata);
if (ret)
return ret;
}
__tpiu_enable(drvdata, 0x8000, 0x101);
return 0;
}
static int tpiu_reg_set_optimum_mode(struct regulator *reg,
unsigned int reg_hpm)
{
if (regulator_count_voltages(reg) <= 0)
return 0;
return regulator_set_optimum_mode(reg, reg_hpm);
}
static int tpiu_reg_set_voltage(struct regulator *reg, unsigned int reg_low,
unsigned int reg_high)
{
if (regulator_count_voltages(reg) <= 0)
return 0;
return regulator_set_voltage(reg, reg_low, reg_high);
}
static int __tpiu_enable_to_sdc(struct tpiu_drvdata *drvdata)
{
int ret;
if (!drvdata->nidntsw && !drvdata->nidnthw)
return -EINVAL;
if (!drvdata->reg || !drvdata->reg_io)
return -EINVAL;
ret = tpiu_reg_set_optimum_mode(drvdata->reg, drvdata->reg_hpm);
if (ret < 0)
return ret;
ret = tpiu_reg_set_voltage(drvdata->reg, drvdata->reg_low,
drvdata->reg_high);
if (ret)
goto err0;
ret = regulator_enable(drvdata->reg);
if (ret)
goto err1;
ret = tpiu_reg_set_optimum_mode(drvdata->reg_io, drvdata->reg_hpm_io);
if (ret < 0)
goto err2;
ret = tpiu_reg_set_voltage(drvdata->reg_io, drvdata->reg_low_io,
drvdata->reg_high_io);
if (ret)
goto err3;
ret = regulator_enable(drvdata->reg_io);
if (ret)
goto err4;
ret = clk_set_rate(drvdata->clk, CORESIGHT_CLK_RATE_FIXED);
if (ret)
goto err5;
return 0;
err5:
regulator_disable(drvdata->reg_io);
err4:
tpiu_reg_set_voltage(drvdata->reg_io, 0, drvdata->reg_high_io);
err3:
tpiu_reg_set_optimum_mode(drvdata->reg_io, 0);
err2:
regulator_disable(drvdata->reg);
err1:
tpiu_reg_set_voltage(drvdata->reg, 0, drvdata->reg_high);
err0:
tpiu_reg_set_optimum_mode(drvdata->reg, 0);
return ret;
}
static int __tpiu_enable_to_sdc_trace(struct tpiu_drvdata *drvdata)
{
int ret;
ret = __tpiu_enable_to_sdc(drvdata);
if (ret)
return ret;
__tpiu_enable(drvdata, 0x8, 0x103);
if (drvdata->nidnthw) {
ret = coresight_nidnt_config_qdsd_enable(true);
if (ret)
goto err;
ret = coresight_nidnt_config_swoverride(NIDNT_MODE_SDC_TRACE);
if (ret)
goto err;
} else {
coresight_nidnt_writel(0x16D, TLMM_SDC2_HDRV_PULL_CTL);
coresight_nidnt_writel(1, TLMM_ETM_MODE);
}
return 0;
err:
__tpiu_disable(drvdata);
__tpiu_disable_to_sdc(drvdata);
return ret;
}
static int __tpiu_enable_to_sdc_swduart(struct tpiu_drvdata *drvdata)
{
int ret;
/*
* Vote for clk on since tracing may or may not be enabled in
* swduart mode and hence the clk is not guaranteed to be enabled.
*/
ret = clk_prepare_enable(drvdata->clk);
if (ret)
return ret;
ret = __tpiu_enable_to_sdc(drvdata);
if (ret)
goto err0;
/*
* Required sequence to prevent SRST asserstion: set trace to
* continuous mode followed by setting ETM MODE to 1 before switching
* to swd.
*/
__tpiu_enable(drvdata, 0x8, 0x103);
if (drvdata->nidnthw) {
ret = coresight_nidnt_config_qdsd_enable(true);
if (ret)
goto err1;
ret = coresight_nidnt_config_swoverride(NIDNT_MODE_SDC_SWDUART);
if (ret)
goto err1;
} else {
coresight_nidnt_writel(1, TLMM_ETM_MODE);
/* Pull down sdc cmd line */
coresight_nidnt_writel(0x96D, TLMM_SDC2_HDRV_PULL_CTL);
coresight_nidnt_writel(2, TLMM_ETM_MODE);
}
return 0;
err1:
__tpiu_disable(drvdata);
__tpiu_disable_to_sdc(drvdata);
err0:
clk_disable_unprepare(drvdata->clk);
return ret;
}
static int __tpiu_enable_to_sdc_swdtrc(struct tpiu_drvdata *drvdata)
{
int ret;
/*
* Vote for clk on since tracing may or may not be enabled in
* swdtrc mode and hence the clk is not guaranteed to be enabled.
*/
ret = clk_prepare_enable(drvdata->clk);
if (ret)
return ret;
ret = __tpiu_enable_to_sdc(drvdata);
if (ret)
goto err0;
/*
* Required sequence to prevent SRST asserstion: set trace to
* continuous mode followed by setting ETM MODE to 1 before switching
* to swd.
*/
__tpiu_enable(drvdata, 0x2, 0x103);
if (drvdata->nidnthw) {
ret = coresight_nidnt_config_qdsd_enable(true);
if (ret)
goto err1;
ret = coresight_nidnt_config_swoverride(NIDNT_MODE_SDC_SWDTRC);
if (ret)
goto err1;
} else {
coresight_nidnt_writel(1, TLMM_ETM_MODE);
/* Pull down sdc cmd line */
coresight_nidnt_writel(0x96D, TLMM_SDC2_HDRV_PULL_CTL);
coresight_nidnt_writel(3, TLMM_ETM_MODE);
}
return 0;
err1:
__tpiu_disable(drvdata);
__tpiu_disable_to_sdc(drvdata);
err0:
clk_disable_unprepare(drvdata->clk);
return ret;
}
static int __tpiu_enable_to_sdc_jtag(struct tpiu_drvdata *drvdata)
{
int ret;
ret = __tpiu_enable_to_sdc(drvdata);
if (ret)
return ret;
ret = coresight_nidnt_config_qdsd_enable(true);
if (ret)
goto err;
ret = coresight_nidnt_config_swoverride(NIDNT_MODE_SDC_JTAG);
if (ret)
goto err;
return 0;
err:
__tpiu_disable_to_sdc(drvdata);
return ret;
}
static int __tpiu_enable_to_sdc_spmi(struct tpiu_drvdata *drvdata)
{
int ret;
ret = __tpiu_enable_to_sdc(drvdata);
if (ret)
return ret;
ret = coresight_nidnt_config_qdsd_enable(true);
if (ret)
goto err;
ret = coresight_nidnt_config_swoverride(NIDNT_MODE_SDC_SPMI);
if (ret)
goto err;
return 0;
err:
__tpiu_disable_to_sdc(drvdata);
return ret;
}
static int tpiu_enable(struct coresight_device *csdev)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
int ret;
ret = clk_prepare_enable(drvdata->clk);
if (ret)
return ret;
mutex_lock(&drvdata->mutex);
/*
* swd modes are enabled when stored in out_mode to allow debugging
* in swd modes.
*/
if (drvdata->out_mode == TPIU_OUT_MODE_MICTOR)
ret = __tpiu_enable_to_mictor(drvdata);
else if (drvdata->out_mode == TPIU_OUT_MODE_SDC_TRACE)
ret = __tpiu_enable_to_sdc_trace(drvdata);
if (ret)
goto err;
drvdata->enable = true;
mutex_unlock(&drvdata->mutex);
dev_info(drvdata->dev, "TPIU enabled\n");
return 0;
err:
mutex_unlock(&drvdata->mutex);
clk_disable_unprepare(drvdata->clk);
return ret;
}
static void __tpiu_disable(struct tpiu_drvdata *drvdata)
{
TPIU_UNLOCK(drvdata);
tpiu_flush_and_stop(drvdata);
TPIU_LOCK(drvdata);
}
static void __tpiu_disable_seta(struct tpiu_drvdata *drvdata)
{
devm_pinctrl_put(drvdata->tpiu_pctrl);
}
static void __tpiu_disable_setb(struct tpiu_drvdata *drvdata)
{
devm_pinctrl_put(drvdata->tpiu_pctrl);
}
static void __tpiu_disable_to_mictor(struct tpiu_drvdata *drvdata)
{
/* mictor mode needs to be disbled only when tracing is enabled */
if (!drvdata->enable)
return;
__tpiu_disable(drvdata);
if (drvdata->set == TPIU_SET_A)
__tpiu_disable_seta(drvdata);
else if (drvdata->set == TPIU_SET_B)
__tpiu_disable_setb(drvdata);
}
static void __tpiu_disable_to_sdc(struct tpiu_drvdata *drvdata)
{
if (drvdata->nidntsw)
coresight_nidnt_writel(0, TLMM_ETM_MODE);
clk_set_rate(drvdata->clk, CORESIGHT_CLK_RATE_TRACE);
regulator_disable(drvdata->reg);
tpiu_reg_set_voltage(drvdata->reg, 0, drvdata->reg_high);
tpiu_reg_set_optimum_mode(drvdata->reg, 0);
regulator_disable(drvdata->reg_io);
tpiu_reg_set_voltage(drvdata->reg_io, 0, drvdata->reg_high_io);
tpiu_reg_set_optimum_mode(drvdata->reg_io, 0);
}
static void __tpiu_disable_to_sdc_trace(struct tpiu_drvdata *drvdata)
{
/* sdc mode needs to be disabled only when tracing is enabled */
if (!drvdata->enable)
return;
__tpiu_disable(drvdata);
__tpiu_disable_to_sdc(drvdata);
/* re-enable the nidnt hardware detect */
coresight_nidnt_enable_hwdetect();
}
static void __tpiu_disable_to_sdc_swduart(struct tpiu_drvdata *drvdata)
{
__tpiu_disable(drvdata);
__tpiu_disable_to_sdc(drvdata);
clk_disable_unprepare(drvdata->clk);
/* re-enable the nidnt hardware detect */
coresight_nidnt_enable_hwdetect();
}
static void __tpiu_disable_to_sdc_swdtrc(struct tpiu_drvdata *drvdata)
{
__tpiu_disable(drvdata);
__tpiu_disable_to_sdc(drvdata);
clk_disable_unprepare(drvdata->clk);
/* re-enable the nidnt hardware detect */
coresight_nidnt_enable_hwdetect();
}
static void __tpiu_disable_to_sdc_jtag(struct tpiu_drvdata *drvdata)
{
__tpiu_disable_to_sdc(drvdata);
/* re-enable the nidnt hardware detect */
coresight_nidnt_enable_hwdetect();
}
static void __tpiu_disable_to_sdc_spmi(struct tpiu_drvdata *drvdata)
{
__tpiu_disable_to_sdc(drvdata);
/* re-enable the nidnt hardware detect */
coresight_nidnt_enable_hwdetect();
}
static void __tpiu_disable_to_out_mode(struct tpiu_drvdata *drvdata)
{
if (drvdata->out_mode == TPIU_OUT_MODE_MICTOR)
__tpiu_disable_to_mictor(drvdata);
else if (drvdata->out_mode == TPIU_OUT_MODE_SDC_TRACE)
__tpiu_disable_to_sdc_trace(drvdata);
else if (drvdata->out_mode == TPIU_OUT_MODE_SDC_SWDUART)
__tpiu_disable_to_sdc_swduart(drvdata);
else if (drvdata->out_mode == TPIU_OUT_MODE_SDC_SWDTRC)
__tpiu_disable_to_sdc_swdtrc(drvdata);
else if (drvdata->out_mode == TPIU_OUT_MODE_SDC_JTAG)
__tpiu_disable_to_sdc_jtag(drvdata);
else if (drvdata->out_mode == TPIU_OUT_MODE_SDC_SPMI)
__tpiu_disable_to_sdc_spmi(drvdata);
}
static void tpiu_disable(struct coresight_device *csdev)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
mutex_lock(&drvdata->mutex);
if (drvdata->out_mode == TPIU_OUT_MODE_MICTOR)
__tpiu_disable_to_mictor(drvdata);
else if (drvdata->out_mode == TPIU_OUT_MODE_SDC_TRACE)
__tpiu_disable_to_sdc_trace(drvdata);
drvdata->enable = false;
mutex_unlock(&drvdata->mutex);
clk_disable_unprepare(drvdata->clk);
dev_info(drvdata->dev, "TPIU disabled\n");
}
static void tpiu_abort(struct coresight_device *csdev)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
__tpiu_disable(drvdata);
dev_info(drvdata->dev, "TPIU aborted\n");
}
static const struct coresight_ops_sink tpiu_sink_ops = {
.enable = tpiu_enable,
.disable = tpiu_disable,
.abort = tpiu_abort,
};
static ssize_t tpiu_show_out_mode(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(dev->parent);
ssize_t len = 0;
uint32_t reg = 0;
int i;
mutex_lock(&drvdata->mutex);
if (drvdata->nidnthw)
reg = coresight_nidnt_get_status();
if (reg) {
/* check mode if nidnthw is enabled */
len = scnprintf(buf, PAGE_SIZE, "%s\n",
reg == NIDNT_MODE_SDC_SPMI ?
"spmi" : (reg ==
NIDNT_MODE_SDC_SWDUART ? "swduart" :
(reg == NIDNT_MODE_SDC_TRACE ?
"trace" : (reg ==
NIDNT_MODE_SDC_SWDTRC ? "swdtrc" :
(reg == TPIU_OUT_MODE_SDC_JTAG ?
"JTAG" : (reg ==
NIDNT_MODE_SDCARD ? "sdcard" : "mictor"))))));
} else {
/* check sw mode when nidnthw is unavailable or disabled */
for (i = 0; i < ARRAY_SIZE(str_tpiu_out_mode); i++) {
if (drvdata->out_mode == i)
len = scnprintf(buf, PAGE_SIZE, "%s\n",
str_tpiu_out_mode[i]);
}
}
mutex_unlock(&drvdata->mutex);
return len;
}
static ssize_t tpiu_store_out_mode(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(dev->parent);
char str[10] = "";
int ret;
if (strlen(buf) >= 10)
return -EINVAL;
if (sscanf(buf, "%s", str) != 1)
return -EINVAL;
mutex_lock(&drvdata->mutex);
if (!strcmp(str, str_tpiu_out_mode[TPIU_OUT_MODE_MICTOR])) {
if (drvdata->out_mode == TPIU_OUT_MODE_MICTOR)
goto out;
__tpiu_disable_to_out_mode(drvdata);
if (!drvdata->enable) {
drvdata->out_mode = TPIU_OUT_MODE_MICTOR;
goto out;
}
ret = __tpiu_enable_to_mictor(drvdata);
if (ret) {
dev_err(drvdata->dev, "failed to enable mictor\n");
goto err;
}
drvdata->out_mode = TPIU_OUT_MODE_MICTOR;
} else if (!strcmp(str, str_tpiu_out_mode[TPIU_OUT_MODE_SDC_TRACE])) {
if (drvdata->out_mode == TPIU_OUT_MODE_SDC_TRACE)
goto out;
__tpiu_disable_to_out_mode(drvdata);
if (!drvdata->enable) {
drvdata->out_mode = TPIU_OUT_MODE_SDC_TRACE;
goto out;
}
ret = __tpiu_enable_to_sdc_trace(drvdata);
if (ret) {
dev_err(drvdata->dev, "failed to enable sdc\n");
goto err;
}
drvdata->out_mode = TPIU_OUT_MODE_SDC_TRACE;
} else if (!strcmp(str, str_tpiu_out_mode[TPIU_OUT_MODE_SDC_SWDUART])) {
if (!drvdata->nidnt_swduart) {
ret = -EINVAL;
goto err;
}
if (drvdata->out_mode == TPIU_OUT_MODE_SDC_SWDUART)
goto out;
/* Allow enabling swd modes even without tracing enabled */
__tpiu_disable_to_out_mode(drvdata);
ret = __tpiu_enable_to_sdc_swduart(drvdata);
if (ret) {
dev_err(drvdata->dev, "failed to enable swd uart\n");
goto err;
}
drvdata->out_mode = TPIU_OUT_MODE_SDC_SWDUART;
} else if (!strcmp(str, str_tpiu_out_mode[TPIU_OUT_MODE_SDC_SWDTRC])) {
if (!drvdata->nidnt_swdtrc) {
ret = -EINVAL;
goto err;
}
if (drvdata->out_mode == TPIU_OUT_MODE_SDC_SWDTRC)
goto out;
/* Allow enabling swd modes even without tracing enabled */
__tpiu_disable_to_out_mode(drvdata);
ret = __tpiu_enable_to_sdc_swdtrc(drvdata);
if (ret) {
dev_err(drvdata->dev, "failed to enable swd trace\n");
goto err;
}
drvdata->out_mode = TPIU_OUT_MODE_SDC_SWDTRC;
} else if (!strcmp(str, str_tpiu_out_mode[TPIU_OUT_MODE_SDC_JTAG])) {
if (!drvdata->nidnt_jtag) {
ret = -EINVAL;
goto err;
}
if (drvdata->out_mode == TPIU_OUT_MODE_SDC_JTAG)
goto out;
/* Allow enabling swd modes even without tracing enabled */
__tpiu_disable_to_out_mode(drvdata);
ret = __tpiu_enable_to_sdc_jtag(drvdata);
if (ret) {
dev_err(drvdata->dev, "failed to enable JTAG\n");
goto err;
}
drvdata->out_mode = TPIU_OUT_MODE_SDC_JTAG;
} else if (!strcmp(str, str_tpiu_out_mode[TPIU_OUT_MODE_SDC_SPMI])) {
if (!drvdata->nidnt_spmi) {
ret = -EINVAL;
goto err;
}
if (drvdata->out_mode == TPIU_OUT_MODE_SDC_SPMI)
goto out;
/* Allow enabling swd modes even without tracing enabled */
__tpiu_disable_to_out_mode(drvdata);
ret = __tpiu_enable_to_sdc_spmi(drvdata);
if (ret) {
dev_err(drvdata->dev, "failed to enable spmi\n");
goto err;
}
drvdata->out_mode = TPIU_OUT_MODE_SDC_SPMI;
}
out:
mutex_unlock(&drvdata->mutex);
return size;
err:
mutex_unlock(&drvdata->mutex);
return ret;
}
static DEVICE_ATTR(out_mode, S_IRUGO | S_IWUSR, tpiu_show_out_mode,
tpiu_store_out_mode);
static ssize_t tpiu_show_available_out_modes(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(dev->parent);
int i;
ssize_t len = 0;
for (i = 0; i < ARRAY_SIZE(str_tpiu_out_mode); i++) {
if ((i == TPIU_OUT_MODE_SDC_SWDTRC && !drvdata->nidnt_swdtrc)
|| (i == TPIU_OUT_MODE_SDC_SWDUART && !drvdata->nidnt_swduart)
|| (i == TPIU_OUT_MODE_SDC_JTAG && !drvdata->nidnt_jtag)
|| (i == TPIU_OUT_MODE_SDC_SPMI && !drvdata->nidnt_spmi))
continue;
len += scnprintf(buf + len, PAGE_SIZE - len, "%s ",
str_tpiu_out_mode[i]);
}
len += scnprintf(buf + len, PAGE_SIZE - len, "\n");
return len;
}
static DEVICE_ATTR(available_out_modes, S_IRUGO, tpiu_show_available_out_modes,
NULL);
static const struct coresight_ops tpiu_cs_ops = {
.sink_ops = &tpiu_sink_ops,
};
static ssize_t tpiu_show_set(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(dev->parent);
return scnprintf(buf, PAGE_SIZE, "%s\n",
drvdata->set == TPIU_SET_A ?
"a" : "b");
}
static ssize_t tpiu_store_set(struct device *dev, struct device_attribute *attr,
const char *buf, size_t size)
{
struct tpiu_drvdata *drvdata = dev_get_drvdata(dev->parent);
char str[10] = "";
int ret;
if (strlen(buf) >= 10)
return -EINVAL;
if (sscanf(buf, "%s", str) != 1)
return -EINVAL;
mutex_lock(&drvdata->mutex);
if (!strcmp(str, "a")) {
if (drvdata->set == TPIU_SET_A)
goto out;
if (!drvdata->enable || drvdata->out_mode !=
TPIU_OUT_MODE_MICTOR) {
drvdata->set = TPIU_SET_A;
goto out;
}
__tpiu_disable_setb(drvdata);
ret = __tpiu_enable_seta(drvdata);
if (ret) {
dev_err(drvdata->dev, "failed to enable set A\n");
goto err;
}
drvdata->set = TPIU_SET_A;
} else if (!strcmp(str, "b")) {
if (drvdata->set == TPIU_SET_B)
goto out;
if (!drvdata->enable || drvdata->out_mode !=
TPIU_OUT_MODE_MICTOR) {
drvdata->set = TPIU_SET_B;
goto out;
}
__tpiu_disable_seta(drvdata);
ret = __tpiu_enable_setb(drvdata);
if (ret) {
dev_err(drvdata->dev, "failed to enable set B\n");
goto err;
}
drvdata->set = TPIU_SET_B;
}
out:
mutex_unlock(&drvdata->mutex);
return size;
err:
mutex_unlock(&drvdata->mutex);
return ret;
}
static DEVICE_ATTR(set, S_IRUGO | S_IWUSR, tpiu_show_set, tpiu_store_set);
static DEVICE_ATTR(nidnt_timeout_value,
S_IRUGO | S_IWUSR,
coresight_nidnt_show_timeout_value,
coresight_nidnt_store_timeout_value);
static DEVICE_ATTR(nidnt_debounce_value,
S_IRUGO | S_IWUSR,
coresight_nidnt_show_debounce_value,
coresight_nidnt_store_debounce_value);
static struct attribute *tpiu_attrs[] = {
&dev_attr_out_mode.attr,
&dev_attr_available_out_modes.attr,
&dev_attr_set.attr,
&dev_attr_nidnt_timeout_value.attr,
&dev_attr_nidnt_debounce_value.attr,
NULL,
};
static struct attribute_group tpiu_attr_grp = {
.attrs = tpiu_attrs,
};
static const struct attribute_group *tpiu_attr_grps[] = {
&tpiu_attr_grp,
NULL,
};
static int tpiu_parse_of_data(struct platform_device *pdev,
struct tpiu_drvdata *drvdata)
{
struct device_node *node = pdev->dev.of_node;
struct device_node *reg_node = NULL;
struct device *dev = &pdev->dev;
const __be32 *prop;
int len, ret;
reg_node = of_parse_phandle(node, "vdd-supply", 0);
if (reg_node) {
drvdata->reg = devm_regulator_get(dev, "vdd");
if (IS_ERR(drvdata->reg))
return PTR_ERR(drvdata->reg);
prop = of_get_property(node, "qcom,vdd-voltage-level", &len);
if (!prop || (len != (2 * sizeof(__be32)))) {
dev_err(dev, "sdc voltage levels not specified\n");
} else {
drvdata->reg_low = be32_to_cpup(&prop[0]);
drvdata->reg_high = be32_to_cpup(&prop[1]);
}
prop = of_get_property(node, "qcom,vdd-current-level", &len);
if (!prop || (len != (2 * sizeof(__be32)))) {
dev_err(dev, "sdc current levels not specified\n");
} else {
drvdata->reg_lpm = be32_to_cpup(&prop[0]);
drvdata->reg_hpm = be32_to_cpup(&prop[1]);
}
of_node_put(reg_node);
} else {
dev_err(dev, "sdc voltage supply not specified or available\n");
}
reg_node = of_parse_phandle(node, "vdd-io-supply", 0);
if (reg_node) {
drvdata->reg_io = devm_regulator_get(dev, "vdd-io");
if (IS_ERR(drvdata->reg_io))
return PTR_ERR(drvdata->reg_io);
prop = of_get_property(node, "qcom,vdd-io-voltage-level", &len);
if (!prop || (len != (2 * sizeof(__be32)))) {
dev_err(dev, "sdc io voltage levels not specified\n");