Commit 252c068b authored by Vasanthakumar Thiagarajan's avatar Vasanthakumar Thiagarajan Committed by Kalle Valo

ath6kl: Add debugfs support to write a chip register

To write a value to register:
echo <register_offset>=<register_value> > <degfs_root>/ieee80211/phyX/ath6kl/reg_write

kvalo: rename file to reg_write to follow the style of other debugfs files
Signed-off-by: default avatarVasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
Signed-off-by: default avatarKalle Valo <kvalo@qca.qualcomm.com>
parent f9ea0753
...@@ -478,6 +478,8 @@ struct ath6kl { ...@@ -478,6 +478,8 @@ struct ath6kl {
void *fwlog_tmp; void *fwlog_tmp;
u32 fwlog_mask; u32 fwlog_mask;
unsigned int dbgfs_diag_reg; unsigned int dbgfs_diag_reg;
u32 diag_reg_addr_wr;
u32 diag_reg_val_wr;
} debug; } debug;
#endif /* CONFIG_ATH6KL_DEBUG */ #endif /* CONFIG_ATH6KL_DEBUG */
}; };
......
...@@ -759,6 +759,68 @@ static const struct file_operations fops_lrssi_roam_threshold = { ...@@ -759,6 +759,68 @@ static const struct file_operations fops_lrssi_roam_threshold = {
.llseek = default_llseek, .llseek = default_llseek,
}; };
static ssize_t ath6kl_regwrite_read(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath6kl *ar = file->private_data;
u8 buf[32];
unsigned int len = 0;
len = scnprintf(buf, sizeof(buf), "Addr: 0x%x Val: 0x%x\n",
ar->debug.diag_reg_addr_wr, ar->debug.diag_reg_val_wr);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t ath6kl_regwrite_write(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath6kl *ar = file->private_data;
char buf[32];
char *sptr, *token;
unsigned int len = 0;
u32 reg_addr, reg_val;
len = min(count, sizeof(buf) - 1);
if (copy_from_user(buf, user_buf, len))
return -EFAULT;
buf[len] = '\0';
sptr = buf;
token = strsep(&sptr, "=");
if (!token)
return -EINVAL;
if (kstrtou32(token, 0, &reg_addr))
return -EINVAL;
if (!ath6kl_dbg_is_diag_reg_valid(reg_addr))
return -EINVAL;
if (kstrtou32(sptr, 0, &reg_val))
return -EINVAL;
ar->debug.diag_reg_addr_wr = reg_addr;
ar->debug.diag_reg_val_wr = reg_val;
if (ath6kl_diag_write32(ar, ar->debug.diag_reg_addr_wr,
cpu_to_le32(ar->debug.diag_reg_val_wr)))
return -EIO;
return count;
}
static const struct file_operations fops_diag_reg_write = {
.read = ath6kl_regwrite_read,
.write = ath6kl_regwrite_write,
.open = ath6kl_debugfs_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
int ath6kl_debug_init(struct ath6kl *ar) int ath6kl_debug_init(struct ath6kl *ar)
{ {
ar->debug.fwlog_buf.buf = vmalloc(ATH6KL_FWLOG_SIZE); ar->debug.fwlog_buf.buf = vmalloc(ATH6KL_FWLOG_SIZE);
...@@ -807,6 +869,10 @@ int ath6kl_debug_init(struct ath6kl *ar) ...@@ -807,6 +869,10 @@ int ath6kl_debug_init(struct ath6kl *ar)
debugfs_create_file("lrssi_roam_threshold", S_IRUSR | S_IWUSR, debugfs_create_file("lrssi_roam_threshold", S_IRUSR | S_IWUSR,
ar->debugfs_phy, ar, &fops_lrssi_roam_threshold); ar->debugfs_phy, ar, &fops_lrssi_roam_threshold);
debugfs_create_file("reg_write", S_IRUSR | S_IWUSR,
ar->debugfs_phy, ar, &fops_diag_reg_write);
return 0; return 0;
} }
......
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