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Message-Id: <1235776054.3164.24.camel@achroite>
Date: Fri, 27 Feb 2009 23:07:33 +0000
From: Ben Hutchings <bhutchings@...arflare.com>
To: David Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org, linux-net-drivers@...arflare.com
Subject: [PATCH 6/9] sfc: Add support for QT2025C PHY
This is a new PHY supporting SFP+ modules, used in the SFN4112F
reference design. It is similar to the QT2022C2 and shares much of
its support code.
Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
---
drivers/net/sfc/falcon.c | 1 +
drivers/net/sfc/net_driver.h | 1 +
drivers/net/sfc/phy.h | 4 +-
drivers/net/sfc/xfp_phy.c | 95 ++++++++++++++++++++++++++++++++++++++----
4 files changed, 91 insertions(+), 10 deletions(-)
diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index d5378e6..9e2f0f0 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -2249,6 +2249,7 @@ static int falcon_probe_phy(struct efx_nic *efx)
efx->phy_op = &falcon_sft9001_phy_ops;
break;
case PHY_TYPE_QT2022C2:
+ case PHY_TYPE_QT2025C:
efx->phy_op = &falcon_xfp_phy_ops;
break;
default:
diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h
index 19930ff..eb768fc 100644
--- a/drivers/net/sfc/net_driver.h
+++ b/drivers/net/sfc/net_driver.h
@@ -450,6 +450,7 @@ enum phy_type {
PHY_TYPE_QT2022C2 = 4,
PHY_TYPE_PM8358 = 6,
PHY_TYPE_SFT9001A = 8,
+ PHY_TYPE_QT2025C = 9,
PHY_TYPE_SFT9001B = 10,
PHY_TYPE_MAX /* Insert any new items before this */
};
diff --git a/drivers/net/sfc/phy.h b/drivers/net/sfc/phy.h
index f6e4722..c1cff9c 100644
--- a/drivers/net/sfc/phy.h
+++ b/drivers/net/sfc/phy.h
@@ -23,11 +23,11 @@ extern void tenxpress_phy_blink(struct efx_nic *efx, bool blink);
extern int sft9001_wait_boot(struct efx_nic *efx);
/****************************************************************************
- * Exported functions from the driver for XFP optical PHYs
+ * AMCC/Quake QT20xx PHYs
*/
extern struct efx_phy_operations falcon_xfp_phy_ops;
-/* The QUAKE XFP PHY provides various H/W control states for LEDs */
+/* These PHYs provide various H/W control states for LEDs */
#define QUAKE_LED_LINK_INVAL (0)
#define QUAKE_LED_LINK_STAT (1)
#define QUAKE_LED_LINK_ACT (2)
diff --git a/drivers/net/sfc/xfp_phy.c b/drivers/net/sfc/xfp_phy.c
index 2df467d..bb1ef77 100644
--- a/drivers/net/sfc/xfp_phy.c
+++ b/drivers/net/sfc/xfp_phy.c
@@ -7,8 +7,8 @@
* by the Free Software Foundation, incorporated herein by reference.
*/
/*
- * Driver for XFP optical PHYs (plus some support specific to the Quake 2022/32)
- * See www.amcc.com for details (search for qt2032)
+ * Driver for SFP+ and XFP optical PHYs plus some support specific to the
+ * AMCC QT20xx adapters; see www.amcc.com for details
*/
#include <linux/timer.h>
@@ -31,6 +31,21 @@
/* Quake-specific MDIO registers */
#define MDIO_QUAKE_LED0_REG (0xD006)
+/* QT2025C only */
+#define PCS_FW_HEARTBEAT_REG 0xd7ee
+#define PCS_FW_HEARTB_LBN 0
+#define PCS_FW_HEARTB_WIDTH 8
+#define PCS_UC8051_STATUS_REG 0xd7fd
+#define PCS_UC_STATUS_LBN 0
+#define PCS_UC_STATUS_WIDTH 8
+#define PCS_UC_STATUS_FW_SAVE 0x20
+#define PMA_PMD_FTX_CTRL2_REG 0xc309
+#define PMA_PMD_FTX_STATIC_LBN 13
+#define PMA_PMD_VEND1_REG 0xc001
+#define PMA_PMD_VEND1_LBTXD_LBN 15
+#define PCS_VEND1_REG 0xc000
+#define PCS_VEND1_LBTXD_LBN 5
+
void xfp_set_led(struct efx_nic *p, int led, int mode)
{
int addr = MDIO_QUAKE_LED0_REG + led;
@@ -45,7 +60,49 @@ struct xfp_phy_data {
#define XFP_MAX_RESET_TIME 500
#define XFP_RESET_WAIT 10
-/* Reset the PHYXS MMD. This is documented (for the Quake PHY) as doing
+static int qt2025c_wait_reset(struct efx_nic *efx)
+{
+ unsigned long timeout = jiffies + 10 * HZ;
+ int phy_id = efx->mii.phy_id;
+ int reg, old_counter = 0;
+
+ /* Wait for firmware heartbeat to start */
+ for (;;) {
+ int counter;
+ reg = mdio_clause45_read(efx, phy_id, MDIO_MMD_PCS,
+ PCS_FW_HEARTBEAT_REG);
+ if (reg < 0)
+ return reg;
+ counter = ((reg >> PCS_FW_HEARTB_LBN) &
+ ((1 << PCS_FW_HEARTB_WIDTH) - 1));
+ if (old_counter == 0)
+ old_counter = counter;
+ else if (counter != old_counter)
+ break;
+ if (time_after(jiffies, timeout))
+ return -ETIMEDOUT;
+ msleep(10);
+ }
+
+ /* Wait for firmware status to look good */
+ for (;;) {
+ reg = mdio_clause45_read(efx, phy_id, MDIO_MMD_PCS,
+ PCS_UC8051_STATUS_REG);
+ if (reg < 0)
+ return reg;
+ if ((reg &
+ ((1 << PCS_UC_STATUS_WIDTH) - 1) << PCS_UC_STATUS_LBN) >=
+ PCS_UC_STATUS_FW_SAVE)
+ break;
+ if (time_after(jiffies, timeout))
+ return -ETIMEDOUT;
+ msleep(100);
+ }
+
+ return 0;
+}
+
+/* Reset the PHYXS MMD. This is documented (for the Quake PHYs) as doing
* a complete soft reset.
*/
static int xfp_reset_phy(struct efx_nic *efx)
@@ -58,6 +115,12 @@ static int xfp_reset_phy(struct efx_nic *efx)
if (rc < 0)
goto fail;
+ if (efx->phy_type == PHY_TYPE_QT2025C) {
+ rc = qt2025c_wait_reset(efx);
+ if (rc < 0)
+ goto fail;
+ }
+
/* Wait 250ms for the PHY to complete bootup */
msleep(250);
@@ -131,12 +194,28 @@ static void xfp_phy_reconfigure(struct efx_nic *efx)
{
struct xfp_phy_data *phy_data = efx->phy_data;
- /* Reset the PHY when moving from tx off to tx on */
- if (!(efx->phy_mode & PHY_MODE_TX_DISABLED) &&
- (phy_data->phy_mode & PHY_MODE_TX_DISABLED))
- xfp_reset_phy(efx);
+ if (efx->phy_type == PHY_TYPE_QT2025C) {
+ /* There are several different register bits which can
+ * disable TX (and save power) on direct-attach cables
+ * or optical transceivers, varying somewhat between
+ * firmware versions. Only 'static mode' appears to
+ * cover everything. */
+ mdio_clause45_set_flag(
+ efx, efx->mii.phy_id, MDIO_MMD_PMAPMD,
+ PMA_PMD_FTX_CTRL2_REG, PMA_PMD_FTX_STATIC_LBN,
+ efx->phy_mode & PHY_MODE_TX_DISABLED ||
+ efx->phy_mode & PHY_MODE_LOW_POWER ||
+ efx->loopback_mode == LOOPBACK_PCS ||
+ efx->loopback_mode == LOOPBACK_PMAPMD);
+ } else {
+ /* Reset the PHY when moving from tx off to tx on */
+ if (!(efx->phy_mode & PHY_MODE_TX_DISABLED) &&
+ (phy_data->phy_mode & PHY_MODE_TX_DISABLED))
+ xfp_reset_phy(efx);
+
+ mdio_clause45_transmit_disable(efx);
+ }
- mdio_clause45_transmit_disable(efx);
mdio_clause45_phy_reconfigure(efx);
phy_data->phy_mode = efx->phy_mode;
--
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
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