From fff3364a637796611c06f59a6f2be61685d99bfe Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Sun, 2 Apr 2017 18:55:22 +0200 Subject: 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 Acked-by: Jon Mason Signed-off-by: Kishon Vijay Abraham I --- drivers/phy/phy-bcm-ns-usb3.c | 69 ++++++++++++++++++++++++++++++------------- 1 file changed, 49 insertions(+), 20 deletions(-) (limited to 'drivers/phy') diff --git a/drivers/phy/phy-bcm-ns-usb3.c b/drivers/phy/phy-bcm-ns-usb3.c index f420fa4..22b5e70 100644 --- 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 + * 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_wait_idle(struct bcm_ns_usb3 *usb3) 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(struct bcm_ns_usb3 *usb3, u32 value) 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(struct bcm_ns_usb3 *usb3) 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(struct bcm_ns_usb3 *usb3) 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(struct bcm_ns_usb3 *usb3) 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); -- cgit v1.1