fbe5306c02
Add support to dump rouleur swr slave regs. Change-Id: I7bb3664ba4a81ab83dae12534dfe403ac1db6013 Signed-off-by: Aditya Bavanari <abavanar@codeaurora.org>
445 lines
9.9 KiB
C
445 lines
9.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (c) 2020, The Linux Foundation. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/device.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/component.h>
|
|
#include <soc/soundwire.h>
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
#include <linux/debugfs.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
#define SWR_SLV_MAX_REG_ADDR 0x2009
|
|
#define SWR_SLV_START_REG_ADDR 0x40
|
|
#define SWR_SLV_MAX_BUF_LEN 20
|
|
#define BYTES_PER_LINE 12
|
|
#define SWR_SLV_RD_BUF_LEN 8
|
|
#define SWR_SLV_WR_BUF_LEN 32
|
|
#define SWR_SLV_MAX_DEVICES 2
|
|
#endif /* CONFIG_DEBUG_FS */
|
|
|
|
struct rouleur_slave_priv {
|
|
struct swr_device *swr_slave;
|
|
#ifdef CONFIG_DEBUG_FS
|
|
struct dentry *debugfs_rouleur_dent;
|
|
struct dentry *debugfs_peek;
|
|
struct dentry *debugfs_poke;
|
|
struct dentry *debugfs_reg_dump;
|
|
unsigned int read_data;
|
|
#endif
|
|
};
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
static int codec_debug_open(struct inode *inode, struct file *file)
|
|
{
|
|
file->private_data = inode->i_private;
|
|
return 0;
|
|
}
|
|
|
|
static int get_parameters(char *buf, u32 *param1, int num_of_par)
|
|
{
|
|
char *token = NULL;
|
|
int base = 0, cnt = 0;
|
|
|
|
token = strsep(&buf, " ");
|
|
for (cnt = 0; cnt < num_of_par; cnt++) {
|
|
if (token) {
|
|
if ((token[1] == 'x') || (token[1] == 'X'))
|
|
base = 16;
|
|
else
|
|
base = 10;
|
|
|
|
if (kstrtou32(token, base, ¶m1[cnt]) != 0)
|
|
return -EINVAL;
|
|
|
|
token = strsep(&buf, " ");
|
|
} else {
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static bool is_swr_slv_reg_readable(int reg)
|
|
{
|
|
int ret = true;
|
|
|
|
if (((reg > 0x46) && (reg < 0x4A)) ||
|
|
((reg > 0x4A) && (reg < 0x50)) ||
|
|
((reg > 0x55) && (reg < 0xD0)) ||
|
|
((reg > 0xD0) && (reg < 0xE0)) ||
|
|
((reg > 0xE0) && (reg < 0xF0)) ||
|
|
((reg > 0xF0) && (reg < 0x100)) ||
|
|
((reg > 0x105) && (reg < 0x120)) ||
|
|
((reg > 0x205) && (reg < 0x220)) ||
|
|
((reg > 0x305) && (reg < 0x320)) ||
|
|
((reg > 0x405) && (reg < 0x420)) ||
|
|
((reg > 0x128) && (reg < 0x130)) ||
|
|
((reg > 0x228) && (reg < 0x230)) ||
|
|
((reg > 0x328) && (reg < 0x330)) ||
|
|
((reg > 0x428) && (reg < 0x430)) ||
|
|
((reg > 0x138) && (reg < 0x205)) ||
|
|
((reg > 0x238) && (reg < 0x305)) ||
|
|
((reg > 0x338) && (reg < 0x405)) ||
|
|
((reg > 0x405) && (reg < 0xF00)) ||
|
|
((reg > 0xF05) && (reg < 0xF20)) ||
|
|
((reg > 0xF25) && (reg < 0xF30)) ||
|
|
((reg > 0xF35) && (reg < 0x2000)))
|
|
ret = false;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t rouleur_swrslave_reg_show(struct swr_device *pdev,
|
|
char __user *ubuf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
int i, reg_val, len;
|
|
ssize_t total = 0;
|
|
char tmp_buf[SWR_SLV_MAX_BUF_LEN];
|
|
|
|
if (!ubuf || !ppos)
|
|
return 0;
|
|
|
|
for (i = (((int) *ppos/BYTES_PER_LINE) + SWR_SLV_START_REG_ADDR);
|
|
i <= SWR_SLV_MAX_REG_ADDR; i++) {
|
|
if (!is_swr_slv_reg_readable(i))
|
|
continue;
|
|
swr_read(pdev, pdev->dev_num, i, ®_val, 1);
|
|
len = snprintf(tmp_buf, sizeof(tmp_buf), "0x%.3x: 0x%.2x\n", i,
|
|
(reg_val & 0xFF));
|
|
if (len < 0) {
|
|
pr_err("%s: fail to fill the buffer\n", __func__);
|
|
total = -EFAULT;
|
|
goto copy_err;
|
|
}
|
|
if (((total + len) >= count - 1) || (len < 0))
|
|
break;
|
|
if (copy_to_user((ubuf + total), tmp_buf, len)) {
|
|
pr_err("%s: fail to copy reg dump\n", __func__);
|
|
total = -EFAULT;
|
|
goto copy_err;
|
|
}
|
|
total += len;
|
|
*ppos += len;
|
|
}
|
|
|
|
copy_err:
|
|
*ppos = SWR_SLV_MAX_REG_ADDR * BYTES_PER_LINE;
|
|
return total;
|
|
}
|
|
|
|
static ssize_t codec_debug_dump(struct file *file, char __user *ubuf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct swr_device *pdev;
|
|
|
|
if (!count || !file || !ppos || !ubuf)
|
|
return -EINVAL;
|
|
|
|
pdev = file->private_data;
|
|
if (!pdev)
|
|
return -EINVAL;
|
|
|
|
if (*ppos < 0)
|
|
return -EINVAL;
|
|
|
|
return rouleur_swrslave_reg_show(pdev, ubuf, count, ppos);
|
|
}
|
|
|
|
static ssize_t codec_debug_read(struct file *file, char __user *ubuf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
char lbuf[SWR_SLV_RD_BUF_LEN];
|
|
struct swr_device *pdev = NULL;
|
|
struct rouleur_slave_priv *rouleur_slave = NULL;
|
|
|
|
if (!count || !file || !ppos || !ubuf)
|
|
return -EINVAL;
|
|
|
|
pdev = file->private_data;
|
|
if (!pdev)
|
|
return -EINVAL;
|
|
|
|
rouleur_slave = swr_get_dev_data(pdev);
|
|
if (!rouleur_slave)
|
|
return -EINVAL;
|
|
|
|
if (*ppos < 0)
|
|
return -EINVAL;
|
|
|
|
snprintf(lbuf, sizeof(lbuf), "0x%x\n",
|
|
(rouleur_slave->read_data & 0xFF));
|
|
|
|
return simple_read_from_buffer(ubuf, count, ppos, lbuf,
|
|
strnlen(lbuf, 7));
|
|
}
|
|
|
|
static ssize_t codec_debug_peek_write(struct file *file,
|
|
const char __user *ubuf, size_t cnt, loff_t *ppos)
|
|
{
|
|
char lbuf[SWR_SLV_WR_BUF_LEN];
|
|
int rc = 0;
|
|
u32 param[5];
|
|
struct swr_device *pdev = NULL;
|
|
struct rouleur_slave_priv *rouleur_slave = NULL;
|
|
|
|
if (!cnt || !file || !ppos || !ubuf)
|
|
return -EINVAL;
|
|
|
|
pdev = file->private_data;
|
|
if (!pdev)
|
|
return -EINVAL;
|
|
|
|
rouleur_slave = swr_get_dev_data(pdev);
|
|
if (!rouleur_slave)
|
|
return -EINVAL;
|
|
|
|
if (*ppos < 0)
|
|
return -EINVAL;
|
|
|
|
if (cnt > sizeof(lbuf) - 1)
|
|
return -EINVAL;
|
|
|
|
rc = copy_from_user(lbuf, ubuf, cnt);
|
|
if (rc)
|
|
return -EFAULT;
|
|
|
|
lbuf[cnt] = '\0';
|
|
rc = get_parameters(lbuf, param, 1);
|
|
if (!((param[0] <= SWR_SLV_MAX_REG_ADDR) && (rc == 0)))
|
|
return -EINVAL;
|
|
swr_read(pdev, pdev->dev_num, param[0], &rouleur_slave->read_data, 1);
|
|
if (rc == 0)
|
|
rc = cnt;
|
|
else
|
|
pr_err("%s: rc = %d\n", __func__, rc);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static ssize_t codec_debug_write(struct file *file,
|
|
const char __user *ubuf, size_t cnt, loff_t *ppos)
|
|
{
|
|
char lbuf[SWR_SLV_WR_BUF_LEN];
|
|
int rc = 0;
|
|
u32 param[5];
|
|
struct swr_device *pdev;
|
|
|
|
if (!file || !ppos || !ubuf)
|
|
return -EINVAL;
|
|
|
|
pdev = file->private_data;
|
|
if (!pdev)
|
|
return -EINVAL;
|
|
|
|
if (cnt > sizeof(lbuf) - 1)
|
|
return -EINVAL;
|
|
|
|
rc = copy_from_user(lbuf, ubuf, cnt);
|
|
if (rc)
|
|
return -EFAULT;
|
|
|
|
lbuf[cnt] = '\0';
|
|
rc = get_parameters(lbuf, param, 2);
|
|
if (!((param[0] <= SWR_SLV_MAX_REG_ADDR) &&
|
|
(param[1] <= 0xFF) && (rc == 0)))
|
|
return -EINVAL;
|
|
swr_write(pdev, pdev->dev_num, param[0], ¶m[1]);
|
|
if (rc == 0)
|
|
rc = cnt;
|
|
else
|
|
pr_err("%s: rc = %d\n", __func__, rc);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static const struct file_operations codec_debug_write_ops = {
|
|
.open = codec_debug_open,
|
|
.write = codec_debug_write,
|
|
};
|
|
|
|
static const struct file_operations codec_debug_read_ops = {
|
|
.open = codec_debug_open,
|
|
.read = codec_debug_read,
|
|
.write = codec_debug_peek_write,
|
|
};
|
|
|
|
static const struct file_operations codec_debug_dump_ops = {
|
|
.open = codec_debug_open,
|
|
.read = codec_debug_dump,
|
|
};
|
|
#endif
|
|
|
|
static int rouleur_slave_bind(struct device *dev,
|
|
struct device *master, void *data)
|
|
{
|
|
int ret = 0;
|
|
uint8_t devnum = 0;
|
|
struct swr_device *pdev = to_swr_device(dev);
|
|
|
|
if (pdev == NULL) {
|
|
dev_err(dev, "%s: pdev is NULL\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = swr_get_logical_dev_num(pdev, pdev->addr, &devnum);
|
|
if (ret) {
|
|
dev_dbg(&pdev->dev,
|
|
"%s get devnum %d for dev addr %lx failed\n",
|
|
__func__, devnum, pdev->addr);
|
|
swr_remove_device(pdev);
|
|
return ret;
|
|
}
|
|
pdev->dev_num = devnum;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void rouleur_slave_unbind(struct device *dev,
|
|
struct device *master, void *data)
|
|
{
|
|
struct rouleur_slave_priv *rouleur_slave = NULL;
|
|
struct swr_device *pdev = to_swr_device(dev);
|
|
|
|
if (pdev == NULL) {
|
|
dev_err(dev, "%s: pdev is NULL\n", __func__);
|
|
return;
|
|
}
|
|
|
|
rouleur_slave = swr_get_dev_data(pdev);
|
|
if (!rouleur_slave) {
|
|
dev_err(&pdev->dev, "%s: rouleur_slave is NULL\n", __func__);
|
|
return;
|
|
}
|
|
|
|
}
|
|
|
|
static const struct swr_device_id rouleur_swr_id[] = {
|
|
{"rouleur-slave", 0},
|
|
{}
|
|
};
|
|
|
|
static const struct of_device_id rouleur_swr_dt_match[] = {
|
|
{
|
|
.compatible = "qcom,rouleur-slave",
|
|
},
|
|
{}
|
|
};
|
|
|
|
static const struct component_ops rouleur_slave_comp_ops = {
|
|
.bind = rouleur_slave_bind,
|
|
.unbind = rouleur_slave_unbind,
|
|
};
|
|
|
|
static int rouleur_swr_up(struct swr_device *pdev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int rouleur_swr_down(struct swr_device *pdev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int rouleur_swr_reset(struct swr_device *pdev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int rouleur_swr_probe(struct swr_device *pdev)
|
|
{
|
|
struct rouleur_slave_priv *rouleur_slave = NULL;
|
|
|
|
rouleur_slave = devm_kzalloc(&pdev->dev,
|
|
sizeof(struct rouleur_slave_priv), GFP_KERNEL);
|
|
if (!rouleur_slave)
|
|
return -ENOMEM;
|
|
|
|
swr_set_dev_data(pdev, rouleur_slave);
|
|
|
|
rouleur_slave->swr_slave = pdev;
|
|
#ifdef CONFIG_DEBUG_FS
|
|
if (!rouleur_slave->debugfs_rouleur_dent) {
|
|
rouleur_slave->debugfs_rouleur_dent = debugfs_create_dir(
|
|
dev_name(&pdev->dev), 0);
|
|
if (!IS_ERR(rouleur_slave->debugfs_rouleur_dent)) {
|
|
rouleur_slave->debugfs_peek =
|
|
debugfs_create_file("swrslave_peek",
|
|
S_IFREG | 0444,
|
|
rouleur_slave->debugfs_rouleur_dent,
|
|
(void *) pdev,
|
|
&codec_debug_read_ops);
|
|
|
|
rouleur_slave->debugfs_poke =
|
|
debugfs_create_file("swrslave_poke",
|
|
S_IFREG | 0444,
|
|
rouleur_slave->debugfs_rouleur_dent,
|
|
(void *) pdev,
|
|
&codec_debug_write_ops);
|
|
|
|
rouleur_slave->debugfs_reg_dump =
|
|
debugfs_create_file(
|
|
"swrslave_reg_dump",
|
|
S_IFREG | 0444,
|
|
rouleur_slave->debugfs_rouleur_dent,
|
|
(void *) pdev,
|
|
&codec_debug_dump_ops);
|
|
}
|
|
}
|
|
#endif
|
|
return component_add(&pdev->dev, &rouleur_slave_comp_ops);
|
|
}
|
|
|
|
static int rouleur_swr_remove(struct swr_device *pdev)
|
|
{
|
|
#ifdef CONFIG_DEBUG_FS
|
|
struct rouleur_slave_priv *rouleur_slave = swr_get_dev_data(pdev);
|
|
|
|
if (rouleur_slave) {
|
|
debugfs_remove_recursive(rouleur_slave->debugfs_rouleur_dent);
|
|
rouleur_slave->debugfs_rouleur_dent = NULL;
|
|
}
|
|
#endif
|
|
component_del(&pdev->dev, &rouleur_slave_comp_ops);
|
|
swr_set_dev_data(pdev, NULL);
|
|
swr_remove_device(pdev);
|
|
return 0;
|
|
}
|
|
|
|
static struct swr_driver rouleur_slave_driver = {
|
|
.driver = {
|
|
.name = "rouleur-slave",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = rouleur_swr_dt_match,
|
|
},
|
|
.probe = rouleur_swr_probe,
|
|
.remove = rouleur_swr_remove,
|
|
.id_table = rouleur_swr_id,
|
|
.device_up = rouleur_swr_up,
|
|
.device_down = rouleur_swr_down,
|
|
.reset_device = rouleur_swr_reset,
|
|
};
|
|
|
|
static int __init rouleur_slave_init(void)
|
|
{
|
|
return swr_driver_register(&rouleur_slave_driver);
|
|
}
|
|
|
|
static void __exit rouleur_slave_exit(void)
|
|
{
|
|
swr_driver_unregister(&rouleur_slave_driver);
|
|
}
|
|
|
|
module_init(rouleur_slave_init);
|
|
module_exit(rouleur_slave_exit);
|
|
|
|
MODULE_DESCRIPTION("Rouleur Swr Slave driver");
|
|
MODULE_LICENSE("GPL v2");
|