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