Commit 077a3804 authored by Yanbo Li's avatar Yanbo Li Committed by Kalle Valo

ath10k: add register access debugfs interface

Debugfs files reg_addr and reg_val are used for reading and writing to the
firmware (target) registers. reg_addr contains the address to be accessed,
which also needs to be set first, and reg_value is when used for reading and
writing the actual value in ASCII.

To read a value from the firmware register 0x100000:

# echo 0x100000 > reg_addr
# cat reg_value
0x00100000:0x000002d3

To write value 0x2400 to address 0x100000:

# echo 0x100000 > reg_addr
# echo  0x2400 > reg_value
#
Signed-off-by: default avatarYanbo Li <yanbol@qti.qualcomm.com>
Signed-off-by: default avatarKalle Valo <kvalo@qca.qualcomm.com>
parent 5d011f5c
......@@ -323,6 +323,7 @@ struct ath10k_debug {
/* protected by conf_mutex */
u32 fw_dbglog_mask;
u32 pktlog_filter;
u32 reg_addr;
u8 htt_max_amsdu;
u8 htt_max_ampdu;
......
......@@ -928,6 +928,125 @@ static const struct file_operations fops_fw_crash_dump = {
.llseek = default_llseek,
};
static ssize_t ath10k_reg_addr_read(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath10k *ar = file->private_data;
u8 buf[32];
unsigned int len = 0;
u32 reg_addr;
mutex_lock(&ar->conf_mutex);
reg_addr = ar->debug.reg_addr;
mutex_unlock(&ar->conf_mutex);
len += scnprintf(buf + len, sizeof(buf) - len, "0x%x\n", reg_addr);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t ath10k_reg_addr_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath10k *ar = file->private_data;
u32 reg_addr;
int ret;
ret = kstrtou32_from_user(user_buf, count, 0, &reg_addr);
if (ret)
return ret;
if (!IS_ALIGNED(reg_addr, 4))
return -EFAULT;
mutex_lock(&ar->conf_mutex);
ar->debug.reg_addr = reg_addr;
mutex_unlock(&ar->conf_mutex);
return count;
}
static const struct file_operations fops_reg_addr = {
.read = ath10k_reg_addr_read,
.write = ath10k_reg_addr_write,
.open = simple_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
static ssize_t ath10k_reg_value_read(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath10k *ar = file->private_data;
u8 buf[48];
unsigned int len;
u32 reg_addr, reg_val;
int ret;
mutex_lock(&ar->conf_mutex);
if (ar->state != ATH10K_STATE_ON &&
ar->state != ATH10K_STATE_UTF) {
ret = -ENETDOWN;
goto exit;
}
reg_addr = ar->debug.reg_addr;
reg_val = ath10k_hif_read32(ar, reg_addr);
len = scnprintf(buf, sizeof(buf), "0x%08x:0x%08x\n", reg_addr, reg_val);
ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
exit:
mutex_unlock(&ar->conf_mutex);
return ret;
}
static ssize_t ath10k_reg_value_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath10k *ar = file->private_data;
u32 reg_addr, reg_val;
int ret;
mutex_lock(&ar->conf_mutex);
if (ar->state != ATH10K_STATE_ON &&
ar->state != ATH10K_STATE_UTF) {
ret = -ENETDOWN;
goto exit;
}
reg_addr = ar->debug.reg_addr;
ret = kstrtou32_from_user(user_buf, count, 0, &reg_val);
if (ret)
goto exit;
ath10k_hif_write32(ar, reg_addr, reg_val);
ret = count;
exit:
mutex_unlock(&ar->conf_mutex);
return ret;
}
static const struct file_operations fops_reg_value = {
.read = ath10k_reg_value_read,
.write = ath10k_reg_value_write,
.open = simple_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
static int ath10k_debug_htt_stats_req(struct ath10k *ar)
{
u64 cookie;
......@@ -1629,6 +1748,12 @@ int ath10k_debug_register(struct ath10k *ar)
debugfs_create_file("fw_crash_dump", S_IRUSR, ar->debug.debugfs_phy,
ar, &fops_fw_crash_dump);
debugfs_create_file("reg_addr", S_IRUSR | S_IWUSR,
ar->debug.debugfs_phy, ar, &fops_reg_addr);
debugfs_create_file("reg_value", S_IRUSR | S_IWUSR,
ar->debug.debugfs_phy, ar, &fops_reg_value);
debugfs_create_file("chip_id", S_IRUSR, ar->debug.debugfs_phy,
ar, &fops_chip_id);
......
......@@ -20,6 +20,7 @@
#include <linux/kernel.h>
#include "core.h"
#include "debug.h"
struct ath10k_hif_sg_item {
u16 transfer_id;
......@@ -84,6 +85,10 @@ struct ath10k_hif_ops {
u16 (*get_free_queue_number)(struct ath10k *ar, u8 pipe_id);
u32 (*read32)(struct ath10k *ar, u32 address);
void (*write32)(struct ath10k *ar, u32 address, u32 value);
/* Power up the device and enter BMI transfer mode for FW download */
int (*power_up)(struct ath10k *ar);
......@@ -187,4 +192,25 @@ static inline int ath10k_hif_resume(struct ath10k *ar)
return ar->hif.ops->resume(ar);
}
static inline u32 ath10k_hif_read32(struct ath10k *ar, u32 address)
{
if (!ar->hif.ops->read32) {
ath10k_warn(ar, "hif read32 not supported\n");
return 0xdeaddead;
}
return ar->hif.ops->read32(ar, address);
}
static inline void ath10k_hif_write32(struct ath10k *ar,
u32 address, u32 data)
{
if (!ar->hif.ops->write32) {
ath10k_warn(ar, "hif write32 not supported\n");
return;
}
ar->hif.ops->write32(ar, address, data);
}
#endif /* _HIF_H_ */
......@@ -1998,6 +1998,8 @@ static const struct ath10k_hif_ops ath10k_pci_hif_ops = {
.get_free_queue_number = ath10k_pci_hif_get_free_queue_number,
.power_up = ath10k_pci_hif_power_up,
.power_down = ath10k_pci_hif_power_down,
.read32 = ath10k_pci_read32,
.write32 = ath10k_pci_write32,
#ifdef CONFIG_PM
.suspend = ath10k_pci_hif_suspend,
.resume = ath10k_pci_hif_resume,
......
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