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Mon, 22 Jul 2019 11:59:58 -0700 (PDT) From: Anand Moon To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Subject: [RFC/RFT 4/5] phy: exynos5-usbdrd: PIPE3 tune signal Date: Tue, 23 Jul 2019 00:29:37 +0530 Message-Id: <20190722185938.9043-5-linux.amoon@gmail.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190722185938.9043-1-linux.amoon@gmail.com> References: <20190722185938.9043-1-linux.amoon@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190722_115959_565908_0779F930 X-CRM114-Status: GOOD ( 12.25 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bartlomiej Zolnierkiewicz , Kukjin Kim , Krzysztof Kozlowski , Kishon Vijay Abraham I Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Tune USB3.0 (PIPE3) PHY TX signal for high and supper speed data transfer. Signed-off-by: Anand Moon --- drivers/phy/samsung/phy-exynos5-usbdrd.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/drivers/phy/samsung/phy-exynos5-usbdrd.c b/drivers/phy/samsung/phy-exynos5-usbdrd.c index 54a513ca15e4..4f16c4f82ae5 100644 --- a/drivers/phy/samsung/phy-exynos5-usbdrd.c +++ b/drivers/phy/samsung/phy-exynos5-usbdrd.c @@ -124,8 +124,10 @@ #define EXYNOS5_DRD_PHYPARAM1 0x20 -#define PHYPARAM1_PCS_TXDEEMPH_MASK (0x1f << 0) -#define PHYPARAM1_PCS_TXDEEMPH (0x1c) +#define PHYPARAM1_TX0_TERM_OFFSET(x) __set(x, 30, 26) +#define PHYPARAM1_TX_SWING_FULL(x) __set(x, 18, 12) +#define PHYPRAAM1_PCS_TX_DEEMPH_6DB(x) __set(x, 11, 6) +#define PHYPRAAM1_PCS_TX_DEEMPH_3P5DB(x) __set(x, 5, 0) #define EXYNOS5_DRD_PHYTERM 0x24 @@ -360,10 +362,16 @@ static void exynos5_usbdrd_pipe3_init(struct exynos5_usbdrd_phy *phy_drd) { u32 reg; - reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1); /* Set Tx De-Emphasis level */ - reg &= ~PHYPARAM1_PCS_TXDEEMPH_MASK; - reg |= PHYPARAM1_PCS_TXDEEMPH; + reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1); + /* Transmitter Termination Offset */ + reg |= PHYPARAM1_TX0_TERM_OFFSET(0x5) | + /* Tx Amplitude (Full Swing mode) */ + PHYPARAM1_TX_SWING_FULL(0x3F) | + /* Tx De-Emphasis at 6 dB */ + PHYPRAAM1_PCS_TX_DEEMPH_6DB(0x20) | + /* Tx De-Emphasis at 3.5 dB */ + PHYPRAAM1_PCS_TX_DEEMPH_3P5DB(0x15); writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1); reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST); -- 2.22.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel