--- /dev/null
+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);
projects / openwrt / staging / florian.git / blobdiff