diff options
Diffstat (limited to 'drivers/usb/gadget/dwc2_udc_otg_phy.c')
-rw-r--r-- | drivers/usb/gadget/dwc2_udc_otg_phy.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/drivers/usb/gadget/dwc2_udc_otg_phy.c b/drivers/usb/gadget/dwc2_udc_otg_phy.c new file mode 100644 index 0000000..eedfe37 --- /dev/null +++ b/drivers/usb/gadget/dwc2_udc_otg_phy.c @@ -0,0 +1,102 @@ +/* + * drivers/usb/gadget/dwc2_udc_otg.c + * Samsung S3C on-chip full/high speed USB OTG 2.0 device controllers + * + * Copyright (C) 2008 for Samsung Electronics + * + * BSP Support for Samsung's UDC driver + * available at: + * git://git.kernel.org/pub/scm/linux/kernel/git/kki_ap/linux-2.6-samsung.git + * + * State machine bugfixes: + * Marek Szyprowski <m.szyprowski@samsung.com> + * + * Ported to u-boot: + * Marek Szyprowski <m.szyprowski@samsung.com> + * Lukasz Majewski <l.majewski@samsumg.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/errno.h> +#include <linux/list.h> +#include <malloc.h> + +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> + +#include <asm/byteorder.h> +#include <asm/unaligned.h> +#include <asm/io.h> + +#include <asm/mach-types.h> + +#include "dwc2_udc_otg_regs.h" +#include "dwc2_udc_otg_priv.h" +#include <usb/lin_gadget_compat.h> + +#include <usb/s3c_udc.h> + +void otg_phy_init(struct dwc2_udc *dev) +{ + unsigned int usb_phy_ctrl = dev->pdata->usb_phy_ctrl; + struct dwc2_usbotg_phy *phy = + (struct dwc2_usbotg_phy *)dev->pdata->regs_phy; + + dev->pdata->phy_control(1); + + /* USB PHY0 Enable */ + printf("USB PHY0 Enable\n"); + + /* Enable PHY */ + writel(readl(usb_phy_ctrl) | USB_PHY_CTRL_EN0, usb_phy_ctrl); + + if (dev->pdata->usb_flags == PHY0_SLEEP) /* C210 Universal */ + writel((readl(&phy->phypwr) + &~(PHY_0_SLEEP | OTG_DISABLE_0 | ANALOG_PWRDOWN) + &~FORCE_SUSPEND_0), &phy->phypwr); + else /* C110 GONI */ + writel((readl(&phy->phypwr) &~(OTG_DISABLE_0 | ANALOG_PWRDOWN) + &~FORCE_SUSPEND_0), &phy->phypwr); + + if (s5p_cpu_id == 0x4412) + writel((readl(&phy->phyclk) & ~(EXYNOS4X12_ID_PULLUP0 | + EXYNOS4X12_COMMON_ON_N0)) | EXYNOS4X12_CLK_SEL_24MHZ, + &phy->phyclk); /* PLL 24Mhz */ + else + writel((readl(&phy->phyclk) & ~(ID_PULLUP0 | COMMON_ON_N0)) | + CLK_SEL_24MHZ, &phy->phyclk); /* PLL 24Mhz */ + + writel((readl(&phy->rstcon) &~(LINK_SW_RST | PHYLNK_SW_RST)) + | PHY_SW_RST0, &phy->rstcon); + udelay(10); + writel(readl(&phy->rstcon) + &~(PHY_SW_RST0 | LINK_SW_RST | PHYLNK_SW_RST), &phy->rstcon); + udelay(10); +} + +void otg_phy_off(struct dwc2_udc *dev) +{ + unsigned int usb_phy_ctrl = dev->pdata->usb_phy_ctrl; + struct dwc2_usbotg_phy *phy = + (struct dwc2_usbotg_phy *)dev->pdata->regs_phy; + + /* reset controller just in case */ + writel(PHY_SW_RST0, &phy->rstcon); + udelay(20); + writel(readl(&phy->phypwr) &~PHY_SW_RST0, &phy->rstcon); + udelay(20); + + writel(readl(&phy->phypwr) | OTG_DISABLE_0 | ANALOG_PWRDOWN + | FORCE_SUSPEND_0, &phy->phypwr); + + writel(readl(usb_phy_ctrl) &~USB_PHY_CTRL_EN0, usb_phy_ctrl); + + writel((readl(&phy->phyclk) & ~(ID_PULLUP0 | COMMON_ON_N0)), + &phy->phyclk); + + udelay(10000); + + dev->pdata->phy_control(0); +} |