Add support for usb driver for i.MX7D SoC

Signed-off-by: Adrian Alonso aalonso@freescale.com Signed-off-by: Ye.Li B37916@freescale.com Signed-off-by: Peng Fan Peng.Fan@freescale.com --- Changes for V2: Resend Changes for V3: - Integrate review obserbations - Add comments for fucntions board_ehci_hcd_init/board_ehci_power Changes for V4: - Follow kernel doc comments style

drivers/usb/host/Makefile | 1 + drivers/usb/host/ehci-mx7.c | 113 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 114 insertions(+) create mode 100644 drivers/usb/host/ehci-mx7.c

diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 4d35d3e..7267160 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -36,6 +36,7 @@ obj-$(CONFIG_USB_EHCI_MXC) += ehci-mxc.o obj-$(CONFIG_USB_EHCI_MXS) += ehci-mxs.o obj-$(CONFIG_USB_EHCI_MX5) += ehci-mx5.o obj-$(CONFIG_USB_EHCI_MX6) += ehci-mx6.o +obj-$(CONFIG_USB_EHCI_MX7) += ehci-mx7.o obj-$(CONFIG_USB_EHCI_OMAP) += ehci-omap.o obj-$(CONFIG_USB_EHCI_PPC4XX) += ehci-ppc4xx.o obj-$(CONFIG_USB_EHCI_MARVELL) += ehci-marvell.o diff --git a/drivers/usb/host/ehci-mx7.c b/drivers/usb/host/ehci-mx7.c new file mode 100644 index 0000000..da6b4dc --- /dev/null +++ b/drivers/usb/host/ehci-mx7.c @@ -0,0 +1,113 @@ +/* + * Copyright (c) 2009 Daniel Mack daniel@caiaq.de + * Copyright (C) 2010-2015 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <usb.h> +#include <errno.h> +#include <linux/compiler.h> +#include <usb/ehci-fsl.h> +#include <asm/io.h> +#include <asm/arch/crm_regs.h> +#include <asm/arch/clock.h> +#include <asm/imx-common/iomux-v3.h> + +#include "ehci.h" + +#define USB_NC_OFFSET 0x200 + +#define UCTRL_PM (1 << 9) /* OTG Power Mask */ +#define UCTRL_OVER_CUR_POL (1 << 8) /* OTG Polarity of Overcurrent */ +#define UCTRL_OVER_CUR_DIS (1 << 7) /* Disable OTG Overcurrent Detection */ + +/* USBCMD */ +#define UCMD_RUN_STOP (1 << 0) /* controller run/stop */ +#define UCMD_RESET (1 << 1) /* controller reset */ + +/* Base address for this IP block is 0x02184800 */ +struct usbnc_regs { + u32 ctrl1; + u32 ctrl2; + u32 reserve1[11]; + u32 phy_ctrl2; + u32 reserve2[6]; + u32 adp_cfg1; + u32 reserve3; + u32 adp_status; +}; + +static void usb_oc_config(int index) +{ + struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR + + (0x10000 * index) + USB_NC_OFFSET); + void __iomem *ctrl = (void __iomem *)(&usbnc->ctrl1); + + setbits_le32(ctrl, UCTRL_OVER_CUR_POL); + setbits_le32(ctrl, UCTRL_OVER_CUR_DIS | UCTRL_PM); +} + +/* + * board_ehci_hcd_init - set usb vbus voltage + * @port: usb otg port + * + * Setup iomux pad to setup supply vbus voltage for usb otg port. + * Machine board file overrides board_ehci_hcd_init + */ +int __weak board_ehci_hcd_init(int port) +{ + return 0; +} + +/* + * board_ehci_power - enables/disables usb vbus voltage + * @port: usb otg port + * @on: on/off vbus voltage + * + * Enables/disables supply vbus voltage for usb otg port. + * Machine board file overrides board_ehci_power + * + */ +int __weak board_ehci_power(int port, int on) +{ + return 0; +} + +int ehci_hcd_init(int index, enum usb_init_type init, + struct ehci_hccr **hccr, struct ehci_hcor **hcor) +{ + struct usb_ehci *ehci = (struct usb_ehci *)(USB_BASE_ADDR + + (0x10000 * index)); + + if (index > 3) + return -EINVAL; + enable_usboh3_clk(1); + mdelay(1); + + /* Do board specific initialization */ + board_ehci_hcd_init(index); + + usb_oc_config(index); + + *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength); + *hcor = (struct ehci_hcor *)((uint32_t)*hccr + + HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase))); + + board_ehci_power(index, (init == USB_INIT_DEVICE) ? 0 : 1); + if (init == USB_INIT_DEVICE) + return 0; + setbits_le32(&ehci->usbmode, CM_HOST); + writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc); + setbits_le32(&ehci->portsc, USB_EN); + + mdelay(10); + + return 0; +} + +int ehci_hcd_stop(int index) +{ + return 0; +}