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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/**
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* samsung_usb_phy.c - DesignWare USB3 (DWC3) PHY handling file
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*
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* Copyright (C) 2015 Samsung Electronics
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*
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* Author: Joonyoung Shim <jy0922.shim@samsung.com>
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*/
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#include <common.h>
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#include <asm/arch/power.h>
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#include <asm/arch/xhci-exynos.h>
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void exynos5_usb3_phy_init(struct exynos_usb3_phy *phy)
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{
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u32 reg;
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/* Reset USB 3.0 PHY */
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writel(0x0, &phy->phy_reg0);
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clrbits_le32(&phy->phy_param0,
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/* Select PHY CLK source */
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PHYPARAM0_REF_USE_PAD |
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/* Set Loss-of-Signal Detector sensitivity */
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PHYPARAM0_REF_LOSLEVEL_MASK);
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setbits_le32(&phy->phy_param0, PHYPARAM0_REF_LOSLEVEL);
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writel(0x0, &phy->phy_resume);
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/*
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* Setting the Frame length Adj value[6:1] to default 0x20
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* See xHCI 1.0 spec, 5.2.4
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*/
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setbits_le32(&phy->link_system,
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LINKSYSTEM_XHCI_VERSION_CONTROL |
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LINKSYSTEM_FLADJ(0x20));
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/* Set Tx De-Emphasis level */
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clrbits_le32(&phy->phy_param1, PHYPARAM1_PCS_TXDEEMPH_MASK);
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setbits_le32(&phy->phy_param1, PHYPARAM1_PCS_TXDEEMPH);
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setbits_le32(&phy->phy_batchg, PHYBATCHG_UTMI_CLKSEL);
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/* PHYTEST POWERDOWN Control */
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clrbits_le32(&phy->phy_test,
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PHYTEST_POWERDOWN_SSP |
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PHYTEST_POWERDOWN_HSP);
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/* UTMI Power Control */
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writel(PHYUTMI_OTGDISABLE, &phy->phy_utmi);
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/* Use core clock from main PLL */
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reg = PHYCLKRST_REFCLKSEL_EXT_REFCLK |
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/* Default 24Mhz crystal clock */
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PHYCLKRST_FSEL(FSEL_CLKSEL_24M) |
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PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF |
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PHYCLKRST_SSC_REFCLKSEL(0) |
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/* Force PortReset of PHY */
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PHYCLKRST_PORTRESET |
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/* Digital power supply in normal operating mode */
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PHYCLKRST_RETENABLEN |
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/* Enable ref clock for SS function */
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PHYCLKRST_REF_SSP_EN |
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/* Enable spread spectrum */
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PHYCLKRST_SSC_EN |
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/* Power down HS Bias and PLL blocks in suspend mode */
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PHYCLKRST_COMMONONN;
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writel(reg, &phy->phy_clk_rst);
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/* giving time to Phy clock to settle before resetting */
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udelay(10);
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reg &= ~PHYCLKRST_PORTRESET;
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writel(reg, &phy->phy_clk_rst);
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}
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