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net: sfp: parse SFP power requirement earlier 

Parse the SFP power requirement earlier, in preparation for moving the
power level setup code.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Russell King 2019-11-10 14:06:39 +00:00 committed by David S. Miller
parent d900954f57
commit ed32abb1ee
1 changed files with 29 additions and 13 deletions
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42
drivers/net/phy/sfp.c
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@ -198,6 +198,8 @@ struct sfp {
unsigned int sm_retries; unsigned int sm_retries;
struct sfp_eeprom_id id; struct sfp_eeprom_id id;
unsigned int module_power_mW;
#if IS_ENABLED(CONFIG_HWMON) #if IS_ENABLED(CONFIG_HWMON)
struct sfp_diag diag; struct sfp_diag diag;
struct device *hwmon_dev; struct device *hwmon_dev;
@ -1374,17 +1376,14 @@ static void sfp_sm_mod_init(struct sfp *sfp)
sfp_sm_probe_phy(sfp); sfp_sm_probe_phy(sfp);
} }
static int sfp_sm_mod_hpower(struct sfp *sfp) static int sfp_module_parse_power(struct sfp *sfp)
{ {
u32 power; u32 power_mW = 1000;
u8 val;
int err;
power = 1000;
if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL))
power = 1500; power_mW = 1500;
if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL))
power = 2000; power_mW = 2000;
if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE && if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE &&
(sfp->id.ext.diagmon & (SFP_DIAGMON_DDM | SFP_DIAGMON_ADDRMODE)) != (sfp->id.ext.diagmon & (SFP_DIAGMON_DDM | SFP_DIAGMON_ADDRMODE)) !=
@ -1393,23 +1392,33 @@ static int sfp_sm_mod_hpower(struct sfp *sfp)
* or requires an address change sequence, so assume that * or requires an address change sequence, so assume that
* the module powers up in the indicated power mode. * the module powers up in the indicated power mode.
*/ */
if (power > sfp->max_power_mW) { if (power_mW > sfp->max_power_mW) {
dev_err(sfp->dev, dev_err(sfp->dev,
"Host does not support %u.%uW modules\n", "Host does not support %u.%uW modules\n",
power / 1000, (power / 100) % 10); power_mW / 1000, (power_mW / 100) % 10);
return -EINVAL; return -EINVAL;
} }
return 0; return 0;
} }
if (power > sfp->max_power_mW) { if (power_mW > sfp->max_power_mW) {
dev_warn(sfp->dev, dev_warn(sfp->dev,
"Host does not support %u.%uW modules, module left in power mode 1\n", "Host does not support %u.%uW modules, module left in power mode 1\n",
power / 1000, (power / 100) % 10); power_mW / 1000, (power_mW / 100) % 10);
return 0; return 0;
} }
if (power <= 1000) sfp->module_power_mW = power_mW;
return 0;
}
static int sfp_sm_mod_hpower(struct sfp *sfp)
{
u8 val;
int err;
if (sfp->module_power_mW <= 1000)
return 0; return 0;
err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val));
@ -1429,7 +1438,8 @@ static int sfp_sm_mod_hpower(struct sfp *sfp)
} }
dev_info(sfp->dev, "Module switched to %u.%uW power level\n", dev_info(sfp->dev, "Module switched to %u.%uW power level\n",
power / 1000, (power / 100) % 10); sfp->module_power_mW / 1000,
(sfp->module_power_mW / 100) % 10);
return T_HPOWER_LEVEL; return T_HPOWER_LEVEL;
err: err:
@ -1516,6 +1526,11 @@ static int sfp_sm_mod_probe(struct sfp *sfp)
dev_warn(sfp->dev, dev_warn(sfp->dev,
"module address swap to access page 0xA2 is not supported.\n"); "module address swap to access page 0xA2 is not supported.\n");
/* Parse the module power requirement */
ret = sfp_module_parse_power(sfp);
if (ret < 0)
return ret;
ret = sfp_hwmon_insert(sfp); ret = sfp_hwmon_insert(sfp);
if (ret < 0) if (ret < 0)
return ret; return ret;
@ -1539,6 +1554,7 @@ static void sfp_sm_mod_remove(struct sfp *sfp)
sfp_module_tx_disable(sfp); sfp_module_tx_disable(sfp);
memset(&sfp->id, 0, sizeof(sfp->id)); memset(&sfp->id, 0, sizeof(sfp->id));
sfp->module_power_mW = 0;
dev_info(sfp->dev, "module removed\n"); dev_info(sfp->dev, "module removed\n");
} }