Commit 56d95e22 authored by Andrew Lunn's avatar Andrew Lunn Committed by David S. Miller

dsa: mv88x6xxx: Add debugfs interface for scratch registers

Allow the contents of the scratch registers to be shown in debugfs.
Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d35bd876
...@@ -901,6 +901,13 @@ static int _mv88e6xxx_atu_wait(struct dsa_switch *ds) ...@@ -901,6 +901,13 @@ static int _mv88e6xxx_atu_wait(struct dsa_switch *ds)
GLOBAL_ATU_OP_BUSY); GLOBAL_ATU_OP_BUSY);
} }
/* Must be called with SMI lock held */
static int _mv88e6xxx_scratch_wait(struct dsa_switch *ds)
{
return _mv88e6xxx_wait(ds, REG_GLOBAL2, GLOBAL2_SCRATCH_MISC,
GLOBAL2_SCRATCH_BUSY);
}
/* Must be called with SMI mutex held */ /* Must be called with SMI mutex held */
static int _mv88e6xxx_phy_read_indirect(struct dsa_switch *ds, int addr, static int _mv88e6xxx_phy_read_indirect(struct dsa_switch *ds, int addr,
int regnum) int regnum)
...@@ -1825,6 +1832,50 @@ static const struct file_operations mv88e6xxx_device_map_fops = { ...@@ -1825,6 +1832,50 @@ static const struct file_operations mv88e6xxx_device_map_fops = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
}; };
static int mv88e6xxx_scratch_show(struct seq_file *s, void *p)
{
struct dsa_switch *ds = s->private;
struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
int reg, ret;
seq_puts(s, "Register Value\n");
mutex_lock(&ps->smi_mutex);
for (reg = 0; reg < 0x80; reg++) {
ret = _mv88e6xxx_reg_write(
ds, REG_GLOBAL2, GLOBAL2_SCRATCH_MISC,
reg << GLOBAL2_SCRATCH_REGISTER_SHIFT);
if (ret < 0)
goto out;
ret = _mv88e6xxx_scratch_wait(ds);
if (ret < 0)
goto out;
ret = _mv88e6xxx_reg_read(ds, REG_GLOBAL2,
GLOBAL2_SCRATCH_MISC);
seq_printf(s, " %2x %2x\n", reg,
ret & GLOBAL2_SCRATCH_VALUE_MASK);
}
out:
mutex_unlock(&ps->smi_mutex);
return 0;
}
static int mv88e6xxx_scratch_open(struct inode *inode, struct file *file)
{
return single_open(file, mv88e6xxx_scratch_show, inode->i_private);
}
static const struct file_operations mv88e6xxx_scratch_fops = {
.open = mv88e6xxx_scratch_open,
.read = seq_read,
.llseek = no_llseek,
.release = single_release,
.owner = THIS_MODULE,
};
int mv88e6xxx_setup_common(struct dsa_switch *ds) int mv88e6xxx_setup_common(struct dsa_switch *ds)
{ {
struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
...@@ -1853,6 +1904,9 @@ int mv88e6xxx_setup_common(struct dsa_switch *ds) ...@@ -1853,6 +1904,9 @@ int mv88e6xxx_setup_common(struct dsa_switch *ds)
debugfs_create_file("device_map", S_IRUGO, ps->dbgfs, ds, debugfs_create_file("device_map", S_IRUGO, ps->dbgfs, ds,
&mv88e6xxx_device_map_fops); &mv88e6xxx_device_map_fops);
debugfs_create_file("scratch", S_IRUGO, ps->dbgfs, ds,
&mv88e6xxx_scratch_fops);
return 0; return 0;
} }
......
...@@ -297,6 +297,9 @@ ...@@ -297,6 +297,9 @@
#define GLOBAL2_SMI_OP_45_READ_DATA ((2 << 10) | GLOBAL2_SMI_OP_BUSY) #define GLOBAL2_SMI_OP_45_READ_DATA ((2 << 10) | GLOBAL2_SMI_OP_BUSY)
#define GLOBAL2_SMI_DATA 0x19 #define GLOBAL2_SMI_DATA 0x19
#define GLOBAL2_SCRATCH_MISC 0x1a #define GLOBAL2_SCRATCH_MISC 0x1a
#define GLOBAL2_SCRATCH_BUSY BIT(15)
#define GLOBAL2_SCRATCH_REGISTER_SHIFT 8
#define GLOBAL2_SCRATCH_VALUE_MASK 0xff
#define GLOBAL2_WDOG_CONTROL 0x1b #define GLOBAL2_WDOG_CONTROL 0x1b
#define GLOBAL2_QOS_WEIGHT 0x1c #define GLOBAL2_QOS_WEIGHT 0x1c
#define GLOBAL2_MISC 0x1d #define GLOBAL2_MISC 0x1d
......
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