From: Anand Moon <linux.amoon@gmail.com>
To: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org
Cc: Kishon Vijay Abraham I <kishon@ti.com>,
Kukjin Kim <kgene@kernel.org>,
Krzysztof Kozlowski <krzk@kernel.org>,
Anand Moon <linux.amoon@gmail.com>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Subject: [RFC/RFT 3/5] phy: exynos5-usbdrd: UTMI tune signal
Date: Tue, 23 Jul 2019 00:29:36 +0530 [thread overview]
Message-ID: <20190722185938.9043-4-linux.amoon@gmail.com> (raw)
In-Reply-To: <20190722185938.9043-1-linux.amoon@gmail.com>
Tune USB2.0 (UTMI+) TX signal for high speed data transfer.
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
drivers/phy/samsung/phy-exynos5-usbdrd.c | 42 +++++++++++++++++++++---
1 file changed, 37 insertions(+), 5 deletions(-)
diff --git a/drivers/phy/samsung/phy-exynos5-usbdrd.c b/drivers/phy/samsung/phy-exynos5-usbdrd.c
index 135114d51bc1..54a513ca15e4 100644
--- a/drivers/phy/samsung/phy-exynos5-usbdrd.c
+++ b/drivers/phy/samsung/phy-exynos5-usbdrd.c
@@ -33,6 +33,8 @@
#define EXYNOS5_FSEL_24MHZ 0x5
#define EXYNOS5_FSEL_50MHZ 0x7
+#define __set(v, a, b) (((v) << (b)) & GENMASK(a, b))
+
/* EXYNOS5: USB 3.0 DRD PHY registers */
#define EXYNOS5_DRD_LINKSYSTEM 0x04
@@ -108,8 +110,17 @@
#define EXYNOS5_DRD_PHYPARAM0 0x1c
#define PHYPARAM0_REF_USE_PAD BIT(31)
-#define PHYPARAM0_REF_LOSLEVEL_MASK (0x1f << 26)
-#define PHYPARAM0_REF_LOSLEVEL (0x9 << 26)
+#define PHYPARAM0_REF_LOSLEVEL(x) __set(x, 30, 26)
+#define PHYPARAM0_TXVREFTUNE(x) __set(x, 25, 22)
+#define PHYPARAM0_TXISETUNE(x) __set(x, 21, 20)
+#define PHYPARAM0_TXRESTUNE(x) __set(x, 19, 18)
+#define PHYPARAM0_TXPREEMPPULSETUNE BIT(17)
+#define PHYPARAM0_TXPREEMPAMPTUNE(x) __set(x, 16, 15)
+#define PHYPARAM0_TXHSXVTUNE(x) __set(x, 14, 13)
+#define PHYPARAM0_TXFSLSTUNE(x) __set(x, 12, 9)
+#define PHYPARAM0_SQRXTUNE(x) __set(x, 8, 6)
+#define PHYPARAM0_OTGTUNE(x) __set(x, 5, 3)
+#define PHYPARAM0_COMPDISTUNE(x) __set(x, 2, 0)
#define EXYNOS5_DRD_PHYPARAM1 0x20
@@ -365,9 +376,30 @@ static void exynos5_usbdrd_utmi_init(struct exynos5_usbdrd_phy *phy_drd)
u32 reg;
reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0);
- /* Set Loss-of-Signal Detector sensitivity */
- reg &= ~PHYPARAM0_REF_LOSLEVEL_MASK;
- reg |= PHYPARAM0_REF_LOSLEVEL;
+ /* Set Loss-of-Signal Detector sensitivity */
+ reg |= (PHYPARAM0_REF_USE_PAD |
+ /* Sets the sensitivity level for the Loss-of-Signal detector */
+ PHYPARAM0_REF_LOSLEVEL(0x9) |
+ /* Adjusts the high-speed DC level voltage */
+ PHYPARAM0_TXVREFTUNE(0x3) |
+ /* Adjust the rise/fal timie of the high-speed waveform */
+ PHYPARAM0_TXISETUNE(0x1) |
+ /* Adjusts the driver source impedance */
+ PHYPARAM0_TXRESTUNE(0x1) |
+ /* HS Transmitter Pre-Emphasis Duration Control */
+ PHYPARAM0_TXPREEMPPULSETUNE |
+ /* HS Transmitter Pre-Emphasis Current Control */
+ PHYPARAM0_TXPREEMPAMPTUNE(0x0) |
+ /* Transmitter High-Speed Crossover Adjustment */
+ PHYPARAM0_TXHSXVTUNE(0x3) |
+ /* FS/LS Source Impedance Adjustment */
+ PHYPARAM0_TXFSLSTUNE(0x3) |
+ /* Squelch Threshold Adjustment */
+ PHYPARAM0_SQRXTUNE(0x3) |
+ /* VBUS Valid Threshold Adjustment */
+ PHYPARAM0_OTGTUNE(0x6) |
+ /* Disconnect Threshold Adjustment */
+ PHYPARAM0_COMPDISTUNE(0x6));
writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0);
reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1);
--
2.22.0
next prev parent reply other threads:[~2019-07-22 19:00 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-22 18:59 [RFC/RFT 0/5] Exynos USB 3.0 PHY tune setting Anand Moon
2019-07-22 18:59 ` [RFC/RFT 1/5] phy: exynos5-usbdrd: read from correct offset of xhci linksystem Anand Moon
2019-07-24 10:59 ` Krzysztof Kozlowski
2019-07-22 18:59 ` [RFC/RFT 2/5] phy: exynos5-usbdrd: add missing tuning of the phyutmi signal Anand Moon
2019-07-24 11:07 ` Krzysztof Kozlowski
2019-07-22 18:59 ` Anand Moon [this message]
2019-07-24 11:10 ` [RFC/RFT 3/5] phy: exynos5-usbdrd: UTMI tune signal Krzysztof Kozlowski
2019-07-22 18:59 ` [RFC/RFT 4/5] phy: exynos5-usbdrd: PIPE3 " Anand Moon
2019-07-24 11:13 ` Krzysztof Kozlowski
2019-07-22 18:59 ` [RFC/RFT 5/5] phy: exynos5-usbdrd: drop duplicate setting " Anand Moon
2019-07-24 11:14 ` Krzysztof Kozlowski
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190722185938.9043-4-linux.amoon@gmail.com \
--to=linux.amoon@gmail.com \
--cc=b.zolnierkie@samsung.com \
--cc=kgene@kernel.org \
--cc=kishon@ti.com \
--cc=krzk@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-samsung-soc@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).