838364dbb4
Update the readable swr slave registers while taking the regdumps. Change-Id: Id38efceb49b6a223f51c24c6d88865b2116b3d29 Signed-off-by: Ganapathiraju Sarath Varma <quic_ganavarm@quicinc.com>
425 行
9.6 KiB
C
425 行
9.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.
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* Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/component.h>
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#include <soc/soundwire.h>
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#ifdef CONFIG_DEBUG_FS
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#include <linux/debugfs.h>
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#include <linux/uaccess.h>
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#define SWR_SLV_MAX_REG_ADDR 0x2009
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#define SWR_SLV_START_REG_ADDR 0x40
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#define SWR_SLV_MAX_BUF_LEN 20
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#define BYTES_PER_LINE 12
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#define SWR_SLV_RD_BUF_LEN 8
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#define SWR_SLV_WR_BUF_LEN 32
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#define SWR_SLV_MAX_DEVICES 2
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#endif /* CONFIG_DEBUG_FS */
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#define SWR_MAX_RETRY 5
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struct wcd938x_slave_priv {
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struct swr_device *swr_slave;
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#ifdef CONFIG_DEBUG_FS
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struct dentry *debugfs_wcd938x_dent;
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struct dentry *debugfs_peek;
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struct dentry *debugfs_poke;
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struct dentry *debugfs_reg_dump;
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unsigned int read_data;
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#endif
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};
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#ifdef CONFIG_DEBUG_FS
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static int codec_debug_open(struct inode *inode, struct file *file)
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{
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file->private_data = inode->i_private;
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return 0;
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}
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static int get_parameters(char *buf, u32 *param1, int num_of_par)
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{
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char *token = NULL;
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int base = 0, cnt = 0;
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token = strsep(&buf, " ");
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for (cnt = 0; cnt < num_of_par; cnt++) {
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if (token) {
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if ((token[1] == 'x') || (token[1] == 'X'))
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base = 16;
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else
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base = 10;
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if (kstrtou32(token, base, ¶m1[cnt]) != 0)
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return -EINVAL;
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token = strsep(&buf, " ");
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} else {
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return -EINVAL;
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}
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}
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return 0;
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}
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static bool is_swr_slv_reg_readable(int reg)
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{
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int ret = true;
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if (((reg > 0x46) && (reg < 0x4A)) ||
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((reg > 0x4A) && (reg < 0x50)) ||
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((reg > 0x55) && (reg < 0xD0)) ||
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((reg > 0xD0) && (reg < 0xE0)) ||
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((reg > 0xE0) && (reg < 0xF0)) ||
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((reg > 0xF0) && (reg < 0x100)) ||
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((reg > 0x105) && (reg < 0x120)) ||
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((reg > 0x205) && (reg < 0x220)) ||
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((reg > 0x305) && (reg < 0x320)) ||
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((reg > 0x405) && (reg < 0x420)) ||
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((reg > 0x128) && (reg < 0x130)) ||
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((reg > 0x228) && (reg < 0x230)) ||
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((reg > 0x328) && (reg < 0x330)) ||
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((reg > 0x428) && (reg < 0x430)) ||
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((reg > 0x138) && (reg < 0x205)) ||
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((reg > 0x238) && (reg < 0x305)) ||
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((reg > 0x338) && (reg < 0x405)) ||
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((reg > 0x405) && (reg < 0x2000)))
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ret = false;
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return ret;
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}
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static ssize_t wcd938x_swrslave_reg_show(struct swr_device *pdev,
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char __user *ubuf,
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size_t count, loff_t *ppos)
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{
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int i, reg_val, len;
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ssize_t total = 0;
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char tmp_buf[SWR_SLV_MAX_BUF_LEN];
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if (!ubuf || !ppos)
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return 0;
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for (i = (((int) *ppos/BYTES_PER_LINE) + SWR_SLV_START_REG_ADDR);
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i <= SWR_SLV_MAX_REG_ADDR; i++) {
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if (!is_swr_slv_reg_readable(i))
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continue;
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swr_read(pdev, pdev->dev_num, i, ®_val, 1);
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len = snprintf(tmp_buf, sizeof(tmp_buf), "0x%.3x: 0x%.2x\n", i,
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(reg_val & 0xFF));
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if (((total + len) >= count - 1) || (len < 0))
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break;
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if (copy_to_user((ubuf + total), tmp_buf, len)) {
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pr_err_ratelimited("%s: fail to copy reg dump\n", __func__);
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total = -EFAULT;
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goto copy_err;
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}
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total += len;
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*ppos += len;
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}
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copy_err:
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*ppos = SWR_SLV_MAX_REG_ADDR * BYTES_PER_LINE;
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return total;
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}
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static ssize_t codec_debug_dump(struct file *file, char __user *ubuf,
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size_t count, loff_t *ppos)
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{
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struct swr_device *pdev;
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if (!count || !file || !ppos || !ubuf)
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return -EINVAL;
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pdev = file->private_data;
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if (!pdev)
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return -EINVAL;
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if (*ppos < 0)
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return -EINVAL;
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return wcd938x_swrslave_reg_show(pdev, ubuf, count, ppos);
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}
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static ssize_t codec_debug_read(struct file *file, char __user *ubuf,
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size_t count, loff_t *ppos)
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{
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char lbuf[SWR_SLV_RD_BUF_LEN];
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struct swr_device *pdev = NULL;
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struct wcd938x_slave_priv *wcd938x_slave = NULL;
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if (!count || !file || !ppos || !ubuf)
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return -EINVAL;
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pdev = file->private_data;
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if (!pdev)
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return -EINVAL;
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wcd938x_slave = swr_get_dev_data(pdev);
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if (!wcd938x_slave)
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return -EINVAL;
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if (*ppos < 0)
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return -EINVAL;
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snprintf(lbuf, sizeof(lbuf), "0x%x\n",
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(wcd938x_slave->read_data & 0xFF));
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return simple_read_from_buffer(ubuf, count, ppos, lbuf,
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strnlen(lbuf, 7));
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}
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static ssize_t codec_debug_peek_write(struct file *file,
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const char __user *ubuf, size_t cnt, loff_t *ppos)
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{
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char lbuf[SWR_SLV_WR_BUF_LEN];
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int rc = 0;
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u32 param[5];
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struct swr_device *pdev = NULL;
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struct wcd938x_slave_priv *wcd938x_slave = NULL;
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if (!cnt || !file || !ppos || !ubuf)
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return -EINVAL;
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pdev = file->private_data;
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if (!pdev)
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return -EINVAL;
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wcd938x_slave = swr_get_dev_data(pdev);
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if (!wcd938x_slave)
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return -EINVAL;
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if (*ppos < 0)
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return -EINVAL;
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if (cnt > sizeof(lbuf) - 1)
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return -EINVAL;
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rc = copy_from_user(lbuf, ubuf, cnt);
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if (rc)
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return -EFAULT;
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lbuf[cnt] = '\0';
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rc = get_parameters(lbuf, param, 1);
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if (!((param[0] <= SWR_SLV_MAX_REG_ADDR) && (rc == 0)))
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return -EINVAL;
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swr_read(pdev, pdev->dev_num, param[0], &wcd938x_slave->read_data, 1);
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if (rc == 0)
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rc = cnt;
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else
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pr_err_ratelimited("%s: rc = %d\n", __func__, rc);
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return rc;
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}
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static ssize_t codec_debug_write(struct file *file,
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const char __user *ubuf, size_t cnt, loff_t *ppos)
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{
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char lbuf[SWR_SLV_WR_BUF_LEN];
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int rc = 0;
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u32 param[5];
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struct swr_device *pdev;
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if (!file || !ppos || !ubuf)
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return -EINVAL;
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pdev = file->private_data;
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if (!pdev)
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return -EINVAL;
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if (cnt > sizeof(lbuf) - 1)
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return -EINVAL;
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rc = copy_from_user(lbuf, ubuf, cnt);
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if (rc)
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return -EFAULT;
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lbuf[cnt] = '\0';
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rc = get_parameters(lbuf, param, 2);
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if (!((param[0] <= SWR_SLV_MAX_REG_ADDR) &&
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(param[1] <= 0xFF) && (rc == 0)))
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return -EINVAL;
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swr_write(pdev, pdev->dev_num, param[0], ¶m[1]);
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if (rc == 0)
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rc = cnt;
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else
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pr_err_ratelimited("%s: rc = %d\n", __func__, rc);
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return rc;
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}
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static const struct file_operations codec_debug_write_ops = {
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.open = codec_debug_open,
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.write = codec_debug_write,
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};
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static const struct file_operations codec_debug_read_ops = {
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.open = codec_debug_open,
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.read = codec_debug_read,
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.write = codec_debug_peek_write,
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};
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static const struct file_operations codec_debug_dump_ops = {
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.open = codec_debug_open,
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.read = codec_debug_dump,
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};
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#endif
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static int wcd938x_slave_bind(struct device *dev,
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struct device *master, void *data)
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{
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int ret = 0;
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uint8_t devnum = 0;
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struct swr_device *pdev = to_swr_device(dev);
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int retry = SWR_MAX_RETRY;
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if (!pdev) {
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pr_err_ratelimited("%s: invalid swr device handle\n", __func__);
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return -EINVAL;
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}
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do {
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/* Add delay for soundwire enumeration */
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usleep_range(100, 110);
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ret = swr_get_logical_dev_num(pdev, pdev->addr, &devnum);
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} while (ret && --retry);
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if (ret) {
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dev_dbg(&pdev->dev,
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"%s get devnum %d for dev addr %llx failed\n",
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__func__, devnum, pdev->addr);
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ret = -EPROBE_DEFER;
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return ret;
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}
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pdev->dev_num = devnum;
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return ret;
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}
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static void wcd938x_slave_unbind(struct device *dev,
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struct device *master, void *data)
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{
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struct wcd938x_slave_priv *wcd938x_slave = NULL;
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struct swr_device *pdev = to_swr_device(dev);
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wcd938x_slave = swr_get_dev_data(pdev);
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if (!wcd938x_slave) {
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dev_err_ratelimited(&pdev->dev, "%s: wcd938x_slave is NULL\n", __func__);
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return;
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}
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}
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static const struct swr_device_id wcd938x_swr_id[] = {
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{"wcd938x-slave", 0},
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{}
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};
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static const struct of_device_id wcd938x_swr_dt_match[] = {
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{
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.compatible = "qcom,wcd938x-slave",
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},
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{}
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};
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static const struct component_ops wcd938x_slave_comp_ops = {
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.bind = wcd938x_slave_bind,
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.unbind = wcd938x_slave_unbind,
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};
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static int wcd938x_swr_probe(struct swr_device *pdev)
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{
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struct wcd938x_slave_priv *wcd938x_slave = NULL;
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wcd938x_slave = devm_kzalloc(&pdev->dev,
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sizeof(struct wcd938x_slave_priv), GFP_KERNEL);
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if (!wcd938x_slave)
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return -ENOMEM;
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swr_set_dev_data(pdev, wcd938x_slave);
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wcd938x_slave->swr_slave = pdev;
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#ifdef CONFIG_DEBUG_FS
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if (!wcd938x_slave->debugfs_wcd938x_dent) {
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wcd938x_slave->debugfs_wcd938x_dent = debugfs_create_dir(
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dev_name(&pdev->dev), 0);
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if (!IS_ERR(wcd938x_slave->debugfs_wcd938x_dent)) {
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wcd938x_slave->debugfs_peek =
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debugfs_create_file("swrslave_peek",
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S_IFREG | 0444,
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wcd938x_slave->debugfs_wcd938x_dent,
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(void *) pdev,
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&codec_debug_read_ops);
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wcd938x_slave->debugfs_poke =
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debugfs_create_file("swrslave_poke",
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S_IFREG | 0444,
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wcd938x_slave->debugfs_wcd938x_dent,
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(void *) pdev,
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&codec_debug_write_ops);
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wcd938x_slave->debugfs_reg_dump =
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debugfs_create_file(
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"swrslave_reg_dump",
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S_IFREG | 0444,
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wcd938x_slave->debugfs_wcd938x_dent,
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(void *) pdev,
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&codec_debug_dump_ops);
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}
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}
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#endif
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return component_add(&pdev->dev, &wcd938x_slave_comp_ops);
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}
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static int wcd938x_swr_remove(struct swr_device *pdev)
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{
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#ifdef CONFIG_DEBUG_FS
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struct wcd938x_slave_priv *wcd938x_slave = swr_get_dev_data(pdev);
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if (wcd938x_slave) {
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debugfs_remove_recursive(wcd938x_slave->debugfs_wcd938x_dent);
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wcd938x_slave->debugfs_wcd938x_dent = NULL;
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}
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#endif
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component_del(&pdev->dev, &wcd938x_slave_comp_ops);
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swr_set_dev_data(pdev, NULL);
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swr_remove_device(pdev);
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return 0;
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}
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static struct swr_driver wcd938x_slave_driver = {
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.driver = {
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.name = "wcd938x-slave",
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.owner = THIS_MODULE,
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.of_match_table = wcd938x_swr_dt_match,
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},
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.probe = wcd938x_swr_probe,
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.remove = wcd938x_swr_remove,
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.id_table = wcd938x_swr_id,
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};
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static int __init wcd938x_slave_init(void)
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{
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return swr_driver_register(&wcd938x_slave_driver);
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}
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static void __exit wcd938x_slave_exit(void)
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{
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swr_driver_unregister(&wcd938x_slave_driver);
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}
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module_init(wcd938x_slave_init);
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module_exit(wcd938x_slave_exit);
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MODULE_DESCRIPTION("WCD938X Swr Slave driver");
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MODULE_LICENSE("GPL v2");
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