152 lines
3.8 KiB
C
152 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
// Copyright(c) 2017-2019 Intel Corporation.
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/soundwire/sdw.h>
|
|
#include <linux/soundwire/sdw_registers.h>
|
|
#include "bus.h"
|
|
|
|
static struct dentry *sdw_debugfs_root;
|
|
|
|
void sdw_bus_debugfs_init(struct sdw_bus *bus)
|
|
{
|
|
char name[16];
|
|
|
|
if (!sdw_debugfs_root)
|
|
return;
|
|
|
|
/* create the debugfs master-N */
|
|
snprintf(name, sizeof(name), "master-%d", bus->link_id);
|
|
bus->debugfs = debugfs_create_dir(name, sdw_debugfs_root);
|
|
}
|
|
|
|
void sdw_bus_debugfs_exit(struct sdw_bus *bus)
|
|
{
|
|
debugfs_remove_recursive(bus->debugfs);
|
|
}
|
|
|
|
#define RD_BUF (3 * PAGE_SIZE)
|
|
|
|
static ssize_t sdw_sprintf(struct sdw_slave *slave,
|
|
char *buf, size_t pos, unsigned int reg)
|
|
{
|
|
int value;
|
|
|
|
value = sdw_read(slave, reg);
|
|
|
|
if (value < 0)
|
|
return scnprintf(buf + pos, RD_BUF - pos, "%3x\tXX\n", reg);
|
|
else
|
|
return scnprintf(buf + pos, RD_BUF - pos,
|
|
"%3x\t%2x\n", reg, value);
|
|
}
|
|
|
|
static int sdw_slave_reg_show(struct seq_file *s_file, void *data)
|
|
{
|
|
struct sdw_slave *slave = s_file->private;
|
|
char *buf;
|
|
ssize_t ret;
|
|
int i, j;
|
|
|
|
buf = kzalloc(RD_BUF, GFP_KERNEL);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
ret = scnprintf(buf, RD_BUF, "Register Value\n");
|
|
|
|
/* DP0 non-banked registers */
|
|
ret += scnprintf(buf + ret, RD_BUF - ret, "\nDP0\n");
|
|
for (i = SDW_DP0_INT; i <= SDW_DP0_PREPARECTRL; i++)
|
|
ret += sdw_sprintf(slave, buf, ret, i);
|
|
|
|
/* DP0 Bank 0 registers */
|
|
ret += scnprintf(buf + ret, RD_BUF - ret, "Bank0\n");
|
|
ret += sdw_sprintf(slave, buf, ret, SDW_DP0_CHANNELEN);
|
|
for (i = SDW_DP0_SAMPLECTRL1; i <= SDW_DP0_LANECTRL; i++)
|
|
ret += sdw_sprintf(slave, buf, ret, i);
|
|
|
|
/* DP0 Bank 1 registers */
|
|
ret += scnprintf(buf + ret, RD_BUF - ret, "Bank1\n");
|
|
ret += sdw_sprintf(slave, buf, ret,
|
|
SDW_DP0_CHANNELEN + SDW_BANK1_OFFSET);
|
|
for (i = SDW_DP0_SAMPLECTRL1 + SDW_BANK1_OFFSET;
|
|
i <= SDW_DP0_LANECTRL + SDW_BANK1_OFFSET; i++)
|
|
ret += sdw_sprintf(slave, buf, ret, i);
|
|
|
|
/* SCP registers */
|
|
ret += scnprintf(buf + ret, RD_BUF - ret, "\nSCP\n");
|
|
for (i = SDW_SCP_INT1; i <= SDW_SCP_BANKDELAY; i++)
|
|
ret += sdw_sprintf(slave, buf, ret, i);
|
|
for (i = SDW_SCP_DEVID_0; i <= SDW_SCP_DEVID_5; i++)
|
|
ret += sdw_sprintf(slave, buf, ret, i);
|
|
|
|
/*
|
|
* SCP Bank 0/1 registers are read-only and cannot be
|
|
* retrieved from the Slave. The Master typically keeps track
|
|
* of the current frame size so the information can be found
|
|
* in other places
|
|
*/
|
|
|
|
/* DP1..14 registers */
|
|
for (i = 1; SDW_VALID_PORT_RANGE(i); i++) {
|
|
|
|
/* DPi registers */
|
|
ret += scnprintf(buf + ret, RD_BUF - ret, "\nDP%d\n", i);
|
|
for (j = SDW_DPN_INT(i); j <= SDW_DPN_PREPARECTRL(i); j++)
|
|
ret += sdw_sprintf(slave, buf, ret, j);
|
|
|
|
/* DPi Bank0 registers */
|
|
ret += scnprintf(buf + ret, RD_BUF - ret, "Bank0\n");
|
|
for (j = SDW_DPN_CHANNELEN_B0(i);
|
|
j <= SDW_DPN_LANECTRL_B0(i); j++)
|
|
ret += sdw_sprintf(slave, buf, ret, j);
|
|
|
|
/* DPi Bank1 registers */
|
|
ret += scnprintf(buf + ret, RD_BUF - ret, "Bank1\n");
|
|
for (j = SDW_DPN_CHANNELEN_B1(i);
|
|
j <= SDW_DPN_LANECTRL_B1(i); j++)
|
|
ret += sdw_sprintf(slave, buf, ret, j);
|
|
}
|
|
|
|
seq_printf(s_file, "%s", buf);
|
|
kfree(buf);
|
|
|
|
return 0;
|
|
}
|
|
DEFINE_SHOW_ATTRIBUTE(sdw_slave_reg);
|
|
|
|
void sdw_slave_debugfs_init(struct sdw_slave *slave)
|
|
{
|
|
struct dentry *master;
|
|
struct dentry *d;
|
|
char name[32];
|
|
|
|
master = slave->bus->debugfs;
|
|
|
|
/* create the debugfs slave-name */
|
|
snprintf(name, sizeof(name), "%s", dev_name(&slave->dev));
|
|
d = debugfs_create_dir(name, master);
|
|
|
|
debugfs_create_file("registers", 0400, d, slave, &sdw_slave_reg_fops);
|
|
|
|
slave->debugfs = d;
|
|
}
|
|
|
|
void sdw_slave_debugfs_exit(struct sdw_slave *slave)
|
|
{
|
|
debugfs_remove_recursive(slave->debugfs);
|
|
}
|
|
|
|
void sdw_debugfs_init(void)
|
|
{
|
|
sdw_debugfs_root = debugfs_create_dir("soundwire", NULL);
|
|
}
|
|
|
|
void sdw_debugfs_exit(void)
|
|
{
|
|
debugfs_remove_recursive(sdw_debugfs_root);
|
|
}
|