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- // 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-%d", bus->id, 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);
- }
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