Add read and write access to a SERDES column in the regs debugfs file
for the Fiber/SERDES registers.
For instance, imagining that the Fiber Control register value is 0x1940,
you can clear the POWER_DOWN bit (11) with:
echo SERDES 0 1140 > /sys/kernel/debug/dsa0/regs
Signed-off-by: Vivien Didelot <vivien.dide...@savoirfairelinux.com>
---
drivers/net/dsa/mv88e6xxx.c | 11 ++++++++---
drivers/net/dsa/mv88e6xxx.h | 4 ++++
2 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index 04e6eb6..f1e9ab4 100644
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c
@@ -1628,16 +1628,18 @@ static int mv88e6xxx_regs_show(struct seq_file *s, void
*p)
struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
int reg, port;
- seq_puts(s, " GLOBAL GLOBAL2 ");
+ seq_puts(s, " GLOBAL GLOBAL2 SERDES ");
for (port = 0 ; port < ps->num_ports; port++)
seq_printf(s, " %2d ", port);
seq_puts(s, "\n");
for (reg = 0; reg < 32; reg++) {
seq_printf(s, "%2x: ", reg);
- seq_printf(s, " %4x %4x ",
+ seq_printf(s, " %4x %4x %4x ",
mv88e6xxx_reg_read(ds, REG_GLOBAL, reg),
- mv88e6xxx_reg_read(ds, REG_GLOBAL2, reg));
+ mv88e6xxx_reg_read(ds, REG_GLOBAL2, reg),
+ mv88e6xxx_phy_page_read(ds, REG_FIBER_SERDES,
+ PAGE_FIBER_SERDES, reg));
for (port = 0 ; port < ps->num_ports; port++)
seq_printf(s, "%4x ",
@@ -1669,6 +1671,9 @@ static ssize_t mv88e6xxx_regs_write(struct file *file,
const char __user *buf,
ret = mv88e6xxx_reg_write(ds, REG_GLOBAL, reg, val);
else if (strcasecmp(name, "GLOBAL2") == 0)
ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, reg, val);
+ else if (strcasecmp(name, "SERDES") == 0)
+ ret = mv88e6xxx_phy_page_write(ds, REG_FIBER_SERDES,
+ PAGE_FIBER_SERDES, reg, val);
else if (kstrtouint(name, 10, &port) == 0 && port < ps->num_ports)
ret = mv88e6xxx_reg_write(ds, REG_PORT(port), reg, val);
else
diff --git a/drivers/net/dsa/mv88e6xxx.h b/drivers/net/dsa/mv88e6xxx.h
index 1bc5a3e..87573c3 100644
--- a/drivers/net/dsa/mv88e6xxx.h
+++ b/drivers/net/dsa/mv88e6xxx.h
@@ -310,6 +310,10 @@
#define GLOBAL2_QOS_WEIGHT 0x1c
#define GLOBAL2_MISC 0x1d
+/* Fiber/SERDES Registers are located at SMI address F, page 1 */
+#define REG_FIBER_SERDES 0x0f
+#define PAGE_FIBER_SERDES 0x01
+
struct mv88e6xxx_priv_state {
/* When using multi-chip addressing, this mutex protects
* access to the indirect access registers. (In single-chip
--
2.4.5
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