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path: root/drivers/net/phy/sfp.c
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Diffstat (limited to 'drivers/net/phy/sfp.c')
-rw-r--r--drivers/net/phy/sfp.c70
1 files changed, 44 insertions, 26 deletions
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index baee371bf767..9dfc1c4c954f 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -1,5 +1,5 @@
#include <linux/delay.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
@@ -88,15 +88,12 @@ static const enum gpiod_flags gpio_flags[] = {
#define T_PROBE_INIT msecs_to_jiffies(300)
#define T_PROBE_RETRY msecs_to_jiffies(100)
-/*
- * SFP modules appear to always have their PHY configured for bus address
+/* SFP modules appear to always have their PHY configured for bus address
* 0x56 (which with mdio-i2c, translates to a PHY address of 22).
*/
#define SFP_PHY_ADDR 22
-/*
- * Give this long for the PHY to reset.
- */
+/* Give this long for the PHY to reset. */
#define T_PHY_RESET_MS 50
static DEFINE_MUTEX(sfp_mutex);
@@ -150,10 +147,10 @@ static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state)
/* If the module is present, drive the signals */
if (sfp->gpio[GPIO_TX_DISABLE])
gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE],
- state & SFP_F_TX_DISABLE);
+ state & SFP_F_TX_DISABLE);
if (state & SFP_F_RATE_SELECT)
gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT],
- state & SFP_F_RATE_SELECT);
+ state & SFP_F_RATE_SELECT);
} else {
/* Otherwise, let them float to the pull-ups */
if (sfp->gpio[GPIO_TX_DISABLE])
@@ -164,7 +161,7 @@ static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state)
}
static int sfp__i2c_read(struct i2c_adapter *i2c, u8 bus_addr, u8 dev_addr,
- void *buf, size_t len)
+ void *buf, size_t len)
{
struct i2c_msg msgs[2];
int ret;
@@ -186,7 +183,7 @@ static int sfp__i2c_read(struct i2c_adapter *i2c, u8 bus_addr, u8 dev_addr,
}
static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 addr, void *buf,
- size_t len)
+ size_t len)
{
return sfp__i2c_read(sfp->i2c, a2 ? 0x51 : 0x50, addr, buf, len);
}
@@ -220,7 +217,6 @@ static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c)
return 0;
}
-
/* Interface */
static unsigned int sfp_get_state(struct sfp *sfp)
{
@@ -295,7 +291,8 @@ static void sfp_sm_next(struct sfp *sfp, unsigned int state,
sfp_sm_set_timer(sfp, timeout);
}
-static void sfp_sm_ins_next(struct sfp *sfp, unsigned int state, unsigned int timeout)
+static void sfp_sm_ins_next(struct sfp *sfp, unsigned int state,
+ unsigned int timeout)
{
sfp->sm_mod_state = state;
sfp_sm_set_timer(sfp, timeout);
@@ -354,12 +351,13 @@ static void sfp_sm_link_check_los(struct sfp *sfp)
{
unsigned int los = sfp->state & SFP_F_LOS;
- /* FIXME: what if neither SFP_OPTIONS_LOS_INVERTED nor
- * SFP_OPTIONS_LOS_NORMAL are set? For now, we assume
- * the same as SFP_OPTIONS_LOS_NORMAL set.
+ /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL
+ * are set, we assume that no LOS signal is available.
*/
- if (sfp->id.ext.options & SFP_OPTIONS_LOS_INVERTED)
+ if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED))
los ^= SFP_F_LOS;
+ else if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL)))
+ los = 0;
if (los)
sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0);
@@ -367,10 +365,27 @@ static void sfp_sm_link_check_los(struct sfp *sfp)
sfp_sm_link_up(sfp);
}
+static bool sfp_los_event_active(struct sfp *sfp, unsigned int event)
+{
+ return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) &&
+ event == SFP_E_LOS_LOW) ||
+ (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) &&
+ event == SFP_E_LOS_HIGH);
+}
+
+static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event)
+{
+ return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) &&
+ event == SFP_E_LOS_HIGH) ||
+ (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) &&
+ event == SFP_E_LOS_LOW);
+}
+
static void sfp_sm_fault(struct sfp *sfp, bool warn)
{
if (sfp->sm_retries && !--sfp->sm_retries) {
- dev_err(sfp->dev, "module persistently indicates fault, disabling\n");
+ dev_err(sfp->dev,
+ "module persistently indicates fault, disabling\n");
sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0);
} else {
if (warn)
@@ -461,7 +476,8 @@ static int sfp_sm_mod_probe(struct sfp *sfp)
memcpy(date, sfp->id.ext.datecode, 8);
date[8] = '\0';
- dev_info(sfp->dev, "module %s %s rev %s sn %s dc %s\n", vendor, part, rev, sn, date);
+ dev_info(sfp->dev, "module %s %s rev %s sn %s dc %s\n",
+ vendor, part, rev, sn, date);
/* We only support SFP modules, not the legacy GBIC modules. */
if (sfp->id.base.phys_id != SFP_PHYS_ID_SFP ||
@@ -471,6 +487,11 @@ static int sfp_sm_mod_probe(struct sfp *sfp)
return -EINVAL;
}
+ /* If the module requires address swap mode, warn about it */
+ if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)
+ dev_warn(sfp->dev,
+ "module address swap to access page 0xA2 is not supported.\n");
+
return sfp_module_insert(sfp->sfp_bus, &sfp->id);
}
@@ -582,9 +603,7 @@ static void sfp_sm_event(struct sfp *sfp, unsigned int event)
case SFP_S_WAIT_LOS:
if (event == SFP_E_TX_FAULT)
sfp_sm_fault(sfp, true);
- else if (event ==
- (sfp->id.ext.options & SFP_OPTIONS_LOS_INVERTED ?
- SFP_E_LOS_HIGH : SFP_E_LOS_LOW))
+ else if (sfp_los_event_inactive(sfp, event))
sfp_sm_link_up(sfp);
break;
@@ -592,9 +611,7 @@ static void sfp_sm_event(struct sfp *sfp, unsigned int event)
if (event == SFP_E_TX_FAULT) {
sfp_sm_link_down(sfp);
sfp_sm_fault(sfp, true);
- } else if (event ==
- (sfp->id.ext.options & SFP_OPTIONS_LOS_INVERTED ?
- SFP_E_LOS_LOW : SFP_E_LOS_HIGH)) {
+ } else if (sfp_los_event_active(sfp, event)) {
sfp_sm_link_down(sfp);
sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0);
}
@@ -640,7 +657,8 @@ static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo)
{
/* locking... and check module is present */
- if (sfp->id.ext.sff8472_compliance) {
+ if (sfp->id.ext.sff8472_compliance &&
+ !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) {
modinfo->type = ETH_MODULE_SFF_8472;
modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
} else {
@@ -651,7 +669,7 @@ static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo)
}
static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee,
- u8 *data)
+ u8 *data)
{
unsigned int first, last, len;
int ret;
generated by cgit v1.2.3 (git 2.39.0) at 2024-10-31 10:19:16 +0300