mvebu: add support for SFP

Add patches for SFP support and package it for ClearFog. Tested with a
Juniper SFP module.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Acked-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 204 insertions, 0 deletions

diff --git a/target/linux/mvebu/patches-4.4/123-phy-generate-swphy-registers-on-the-fly.patch b/target/linux/mvebu/patches-4.4/123-phy-generate-swphy-registers-on-the-fly.patch
new file mode 100644
index 0000000000..218b902e7d
--- /dev/null
+++ b/target/linux/mvebu/patches-4.4/123-phy-generate-swphy-registers-on-the-fly.patch
@@ -0,0 +1,204 @@
+From e0f33a88243329da1aa5a90fe10ab25c9fb0a091 Mon Sep 17 00:00:00 2001
+From: Russell King <rmk+kernel@arm.linux.org.uk>
+Date: Sun, 20 Sep 2015 11:28:39 +0100
+Subject: [PATCH 712/744] phy: generate swphy registers on the fly
+
+Generate software phy registers as and when requested, rather than
+duplicating the state in fixed_phy.  This allows us to eliminate
+the duplicate storage of of the same data, which is only different
+in format.
+
+As fixed_phy_update_regs() no longer updates register state, rename
+it to fixed_phy_update().
+
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
+---
+ drivers/net/phy/fixed_phy.c | 31 +++++-------------------------
+ drivers/net/phy/swphy.c     | 47 ++++++++++++++++++++++++++++++++-------------
+ drivers/net/phy/swphy.h     |  2 +-
+ 3 files changed, 40 insertions(+), 40 deletions(-)
+
+--- a/drivers/net/phy/fixed_phy.c
++++ b/drivers/net/phy/fixed_phy.c
+@@ -26,8 +26,6 @@
+ 
+ #include "swphy.h"
+ 
+-#define MII_REGS_NUM 29
+-
+ struct fixed_mdio_bus {
+ 	int irqs[PHY_MAX_ADDR];
+ 	struct mii_bus *mii_bus;
+@@ -36,7 +34,6 @@ struct fixed_mdio_bus {
+ 
+ struct fixed_phy {
+ 	int addr;
+-	u16 regs[MII_REGS_NUM];
+ 	struct phy_device *phydev;
+ 	struct fixed_phy_status status;
+ 	int (*link_update)(struct net_device *, struct fixed_phy_status *);
+@@ -49,12 +46,10 @@ static struct fixed_mdio_bus platform_fm
+ 	.phys = LIST_HEAD_INIT(platform_fmb.phys),
+ };
+ 
+-static void fixed_phy_update_regs(struct fixed_phy *fp)
++static void fixed_phy_update(struct fixed_phy *fp)
+ {
+ 	if (gpio_is_valid(fp->link_gpio))
+ 		fp->status.link = !!gpio_get_value_cansleep(fp->link_gpio);
+-
+-	swphy_update_regs(fp->regs, &fp->status);
+ }
+ 
+ static int fixed_mdio_read(struct mii_bus *bus, int phy_addr, int reg_num)
+@@ -62,29 +57,15 @@ static int fixed_mdio_read(struct mii_bu
+ 	struct fixed_mdio_bus *fmb = bus->priv;
+ 	struct fixed_phy *fp;
+ 
+-	if (reg_num >= MII_REGS_NUM)
+-		return -1;
+-
+-	/* We do not support emulating Clause 45 over Clause 22 register reads
+-	 * return an error instead of bogus data.
+-	 */
+-	switch (reg_num) {
+-	case MII_MMD_CTRL:
+-	case MII_MMD_DATA:
+-		return -1;
+-	default:
+-		break;
+-	}
+-
+ 	list_for_each_entry(fp, &fmb->phys, node) {
+ 		if (fp->addr == phy_addr) {
+ 			/* Issue callback if user registered it. */
+ 			if (fp->link_update) {
+ 				fp->link_update(fp->phydev->attached_dev,
+ 						&fp->status);
+-				fixed_phy_update_regs(fp);
++				fixed_phy_update(fp);
+ 			}
+-			return fp->regs[reg_num];
++			return swphy_read_reg(reg_num, &fp->status);
+ 		}
+ 	}
+ 
+@@ -144,7 +125,7 @@ int fixed_phy_update_state(struct phy_de
+ 			_UPD(pause);
+ 			_UPD(asym_pause);
+ #undef _UPD
+-			fixed_phy_update_regs(fp);
++			fixed_phy_update(fp);
+ 			return 0;
+ 		}
+ 	}
+@@ -169,8 +150,6 @@ int fixed_phy_add(unsigned int irq, int
+ 	if (!fp)
+ 		return -ENOMEM;
+ 
+-	memset(fp->regs, 0xFF,  sizeof(fp->regs[0]) * MII_REGS_NUM);
+-
+ 	fmb->irqs[phy_addr] = irq;
+ 
+ 	fp->addr = phy_addr;
+@@ -184,7 +163,7 @@ int fixed_phy_add(unsigned int irq, int
+ 			goto err_regs;
+ 	}
+ 
+-	fixed_phy_update_regs(fp);
++	fixed_phy_update(fp);
+ 
+ 	list_add_tail(&fp->node, &fmb->phys);
+ 
+--- a/drivers/net/phy/swphy.c
++++ b/drivers/net/phy/swphy.c
+@@ -20,6 +20,8 @@
+ 
+ #include "swphy.h"
+ 
++#define MII_REGS_NUM 29
++
+ struct swmii_regs {
+ 	u16 bmcr;
+ 	u16 bmsr;
+@@ -110,14 +112,13 @@ int swphy_validate_state(const struct fi
+ EXPORT_SYMBOL_GPL(swphy_validate_state);
+ 
+ /**
+- * swphy_update_regs - update MII register array with fixed phy state
+- * @regs: array of 32 registers to update
++ * swphy_read_reg - return a MII register from the fixed phy state
++ * @reg: MII register
+  * @state: fixed phy status
+  *
+- * Update the array of MII registers with the fixed phy link, speed,
+- * duplex and pause mode settings.
++ * Return the MII @reg register generated from the fixed phy state @state.
+  */
+-void swphy_update_regs(u16 *regs, const struct fixed_phy_status *state)
++int swphy_read_reg(int reg, const struct fixed_phy_status *state)
+ {
+ 	int speed_index, duplex_index;
+ 	u16 bmsr = BMSR_ANEGCAPABLE;
+@@ -125,9 +126,12 @@ void swphy_update_regs(u16 *regs, const
+ 	u16 lpagb = 0;
+ 	u16 lpa = 0;
+ 
++	if (reg > MII_REGS_NUM)
++		return -1;
++
+ 	speed_index = swphy_decode_speed(state->speed);
+ 	if (WARN_ON(speed_index < 0))
+-		return;
++		return 0;
+ 
+ 	duplex_index = state->duplex ? SWMII_DUPLEX_FULL : SWMII_DUPLEX_HALF;
+ 
+@@ -147,12 +151,29 @@ void swphy_update_regs(u16 *regs, const
+ 			lpa |= LPA_PAUSE_ASYM;
+ 	}
+ 
+-	regs[MII_PHYSID1] = 0;
+-	regs[MII_PHYSID2] = 0;
++	switch (reg) {
++	case MII_BMCR:
++		return bmcr;
++	case MII_BMSR:
++		return bmsr;
++	case MII_PHYSID1:
++	case MII_PHYSID2:
++		return 0;
++	case MII_LPA:
++		return lpa;
++	case MII_STAT1000:
++		return lpagb;
++
++	/*
++	 * We do not support emulating Clause 45 over Clause 22 register
++	 * reads.  Return an error instead of bogus data.
++	 */
++	case MII_MMD_CTRL:
++	case MII_MMD_DATA:
++		return -1;
+ 
+-	regs[MII_BMSR] = bmsr;
+-	regs[MII_BMCR] = bmcr;
+-	regs[MII_LPA] = lpa;
+-	regs[MII_STAT1000] = lpagb;
++	default:
++		return 0xffff;
++	}
+ }
+-EXPORT_SYMBOL_GPL(swphy_update_regs);
++EXPORT_SYMBOL_GPL(swphy_read_reg);
+--- a/drivers/net/phy/swphy.h
++++ b/drivers/net/phy/swphy.h
+@@ -4,6 +4,6 @@
+ struct fixed_phy_status;
+ 
+ int swphy_validate_state(const struct fixed_phy_status *state);
+-void swphy_update_regs(u16 *regs, const struct fixed_phy_status *state);
++int swphy_read_reg(int reg, const struct fixed_phy_status *state);
+ 
+ #endif