bcm53xx: backport USB 3.0 PHY patch cleaning all writes

It doesn't change any bevahior just cleanes up the code.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

2 files changed, 177 insertions, 0 deletions

diff --git a/target/linux/bcm53xx/patches-4.4/071-phy-bcm-ns-usb3-new-driver-for-USB-3.0-PHY-on-Norths.patch b/target/linux/bcm53xx/patches-4.4/071-0001-phy-bcm-ns-usb3-new-driver-for-USB-3.0-PHY-on-Norths.patch
index ad34fc8484..ad34fc8484 100644
--- a/target/linux/bcm53xx/patches-4.4/071-phy-bcm-ns-usb3-new-driver-for-USB-3.0-PHY-on-Norths.patch
+++ b/target/linux/bcm53xx/patches-4.4/071-0001-phy-bcm-ns-usb3-new-driver-for-USB-3.0-PHY-on-Norths.patch
diff --git a/target/linux/bcm53xx/patches-4.4/071-0002-phy-bcm-ns-usb3-split-all-writes-into-reg-val-pairs.patch b/target/linux/bcm53xx/patches-4.4/071-0002-phy-bcm-ns-usb3-split-all-writes-into-reg-val-pairs.patch
new file mode 100644
index 0000000000..ddbec25863
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.4/071-0002-phy-bcm-ns-usb3-split-all-writes-into-reg-val-pairs.patch
@@ -0,0 +1,177 @@
+From fff3364a637796611c06f59a6f2be61685d99bfe Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Sun, 2 Apr 2017 18:55:22 +0200
+Subject: [PATCH] phy: bcm-ns-usb3: split all writes into reg & val pairs
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+So far all the PHY initialization was implemented using some totally
+magic values. There was some pattern there but it wasn't clear what is
+it about.
+
+Thanks to the patch submitted by Broadcom:
+[PATCH 5/6] phy: Add USB3 PHY support for Broadcom NSP SoC
+and the upstream "iproc-mdio" driver we now know there is a MDIO bus
+underneath with PHY(s) and their registers.
+
+It allows us to clean the driver a bit by making all these values less
+magical. The next step is switching to using a proper MDIO layer.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Acked-by: Jon Mason <jon.mason@broadcom.com>
+Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
+---
+ drivers/phy/phy-bcm-ns-usb3.c | 69 ++++++++++++++++++++++++++++++-------------
+ 1 file changed, 49 insertions(+), 20 deletions(-)
+
+--- a/drivers/phy/phy-bcm-ns-usb3.c
++++ b/drivers/phy/phy-bcm-ns-usb3.c
+@@ -2,6 +2,7 @@
+  * Broadcom Northstar USB 3.0 PHY Driver
+  *
+  * Copyright (C) 2016 Rafał Miłecki <rafal@milecki.pl>
++ * Copyright (C) 2016 Broadcom
+  *
+  * All magic values used for initialization (and related comments) were obtained
+  * from Broadcom's SDK:
+@@ -23,6 +24,23 @@
+ 
+ #define BCM_NS_USB3_MII_MNG_TIMEOUT_US	1000	/* usecs */
+ 
++#define BCM_NS_USB3_PHY_BASE_ADDR_REG	0x1f
++#define BCM_NS_USB3_PHY_PLL30_BLOCK	0x8000
++#define BCM_NS_USB3_PHY_TX_PMD_BLOCK	0x8040
++#define BCM_NS_USB3_PHY_PIPE_BLOCK	0x8060
++
++/* Registers of PLL30 block */
++#define BCM_NS_USB3_PLL_CONTROL		0x01
++#define BCM_NS_USB3_PLLA_CONTROL0	0x0a
++#define BCM_NS_USB3_PLLA_CONTROL1	0x0b
++
++/* Registers of TX PMD block */
++#define BCM_NS_USB3_TX_PMD_CONTROL1	0x01
++
++/* Registers of PIPE block */
++#define BCM_NS_USB3_LFPS_CMP		0x02
++#define BCM_NS_USB3_LFPS_DEGLITCH	0x03
++
+ enum bcm_ns_family {
+ 	BCM_NS_UNKNOWN,
+ 	BCM_NS_AX,
+@@ -76,8 +94,10 @@ static inline int bcm_ns_usb3_mii_mng_wa
+ 				    usecs_to_jiffies(BCM_NS_USB3_MII_MNG_TIMEOUT_US));
+ }
+ 
+-static int bcm_ns_usb3_mii_mng_write32(struct bcm_ns_usb3 *usb3, u32 value)
++static int bcm_ns_usb3_mdio_phy_write(struct bcm_ns_usb3 *usb3, u16 reg,
++				      u16 value)
+ {
++	u32 tmp = 0;
+ 	int err;
+ 
+ 	err = bcm_ns_usb3_mii_mng_wait_idle(usb3);
+@@ -86,7 +106,11 @@ static int bcm_ns_usb3_mii_mng_write32(s
+ 		return err;
+ 	}
+ 
+-	writel(value, usb3->ccb_mii + BCMA_CCB_MII_MNG_CMD_DATA);
++	/* TODO: Use a proper MDIO bus layer */
++	tmp |= 0x58020000; /* Magic value for MDIO PHY write */
++	tmp |= reg << 18;
++	tmp |= value;
++	writel(tmp, usb3->ccb_mii + BCMA_CCB_MII_MNG_CMD_DATA);
+ 
+ 	return 0;
+ }
+@@ -102,21 +126,22 @@ static int bcm_ns_usb3_phy_init_ns_bx(st
+ 	udelay(2);
+ 
+ 	/* USB3 PLL Block */
+-	err = bcm_ns_usb3_mii_mng_write32(usb3, 0x587e8000);
++	err = bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PHY_BASE_ADDR_REG,
++					 BCM_NS_USB3_PHY_PLL30_BLOCK);
+ 	if (err < 0)
+ 		return err;
+ 
+ 	/* Assert Ana_Pllseq start */
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x58061000);
++	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PLL_CONTROL, 0x1000);
+ 
+ 	/* Assert CML Divider ratio to 26 */
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x582a6400);
++	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PLLA_CONTROL0, 0x6400);
+ 
+ 	/* Asserting PLL Reset */
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x582ec000);
++	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PLLA_CONTROL1, 0xc000);
+ 
+ 	/* Deaaserting PLL Reset */
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x582e8000);
++	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PLLA_CONTROL1, 0x8000);
+ 
+ 	/* Waiting MII Mgt interface idle */
+ 	bcm_ns_usb3_mii_mng_wait_idle(usb3);
+@@ -125,22 +150,24 @@ static int bcm_ns_usb3_phy_init_ns_bx(st
+ 	writel(0, usb3->dmp + BCMA_RESET_CTL);
+ 
+ 	/* PLL frequency monitor enable */
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x58069000);
++	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PLL_CONTROL, 0x9000);
+ 
+ 	/* PIPE Block */
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x587e8060);
++	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PHY_BASE_ADDR_REG,
++				   BCM_NS_USB3_PHY_PIPE_BLOCK);
+ 
+ 	/* CMPMAX & CMPMINTH setting */
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x580af30d);
++	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_LFPS_CMP, 0xf30d);
+ 
+ 	/* DEGLITCH MIN & MAX setting */
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x580e6302);
++	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_LFPS_DEGLITCH, 0x6302);
+ 
+ 	/* TXPMD block */
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x587e8040);
++	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PHY_BASE_ADDR_REG,
++				   BCM_NS_USB3_PHY_TX_PMD_BLOCK);
+ 
+ 	/* Enabling SSC */
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x58061003);
++	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_TX_PMD_CONTROL1, 0x1003);
+ 
+ 	/* Waiting MII Mgt interface idle */
+ 	bcm_ns_usb3_mii_mng_wait_idle(usb3);
+@@ -159,22 +186,24 @@ static int bcm_ns_usb3_phy_init_ns_ax(st
+ 	udelay(2);
+ 
+ 	/* PLL30 block */
+-	err = bcm_ns_usb3_mii_mng_write32(usb3, 0x587e8000);
++	err = bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PHY_BASE_ADDR_REG,
++					 BCM_NS_USB3_PHY_PLL30_BLOCK);
+ 	if (err < 0)
+ 		return err;
+ 
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x582a6400);
++	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PLLA_CONTROL0, 0x6400);
+ 
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x587e80e0);
++	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PHY_BASE_ADDR_REG, 0x80e0);
+ 
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x580a009c);
++	bcm_ns_usb3_mdio_phy_write(usb3, 0x02, 0x009c);
+ 
+ 	/* Enable SSC */
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x587e8040);
++	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_PHY_BASE_ADDR_REG,
++				   BCM_NS_USB3_PHY_TX_PMD_BLOCK);
+ 
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x580a21d3);
++	bcm_ns_usb3_mdio_phy_write(usb3, 0x02, 0x21d3);
+ 
+-	bcm_ns_usb3_mii_mng_write32(usb3, 0x58061003);
++	bcm_ns_usb3_mdio_phy_write(usb3, BCM_NS_USB3_TX_PMD_CONTROL1, 0x1003);
+ 
+ 	/* Waiting MII Mgt interface idle */
+ 	bcm_ns_usb3_mii_mng_wait_idle(usb3);