diff options
author | Michal Simek <monstr@monstr.eu> | 2014-04-25 10:21:04 (GMT) |
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committer | Michal Simek <michal.simek@xilinx.com> | 2014-05-14 05:43:35 (GMT) |
commit | eb8c54bfaabec7b8ba65a054f6c3e37572288ae9 (patch) | |
tree | e85430dc520a89c97c0d1ec4deaf901e9e04b033 /drivers/usb/host/ehci-zynq.c | |
parent | 3cc3fa8672705e609ccd25348438453bd8de07fd (diff) | |
download | u-boot-eb8c54bfaabec7b8ba65a054f6c3e37572288ae9.tar.xz |
ARM: zynq: ehci: Added USB host driver support
Added USB host driver for zynq.
Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'drivers/usb/host/ehci-zynq.c')
-rw-r--r-- | drivers/usb/host/ehci-zynq.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-zynq.c b/drivers/usb/host/ehci-zynq.c new file mode 100644 index 0000000..7770d05 --- /dev/null +++ b/drivers/usb/host/ehci-zynq.c @@ -0,0 +1,104 @@ +/* + * (C) Copyright 2014, Xilinx, Inc + * + * USB Low level initialization(Specific to zynq) + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/arch/hardware.h> +#include <asm/arch/sys_proto.h> +#include <asm/io.h> +#include <usb.h> +#include <usb/ehci-fsl.h> +#include <usb/ulpi.h> + +#include "ehci.h" + +#define ZYNQ_USB_USBCMD_RST 0x0000002 +#define ZYNQ_USB_USBCMD_STOP 0x0000000 +#define ZYNQ_USB_NUM_MIO 12 + +/* + * Create the appropriate control structures to manage + * a new EHCI host controller. + */ +int ehci_hcd_init(int index, enum usb_init_type init, struct ehci_hccr **hccr, + struct ehci_hcor **hcor) +{ + struct usb_ehci *ehci; + struct ulpi_viewport ulpi_vp; + int ret, mio_usb; + /* Used for writing the ULPI data address */ + struct ulpi_regs *ulpi = (struct ulpi_regs *)0; + + if (!index) { + mio_usb = zynq_slcr_get_mio_pin_status("usb0"); + if (mio_usb != ZYNQ_USB_NUM_MIO) { + printf("usb0 wrong num MIO: %d, Index %d\n", mio_usb, + index); + return -1; + } + ehci = (struct usb_ehci *)ZYNQ_USB_BASEADDR0; + } else { + mio_usb = zynq_slcr_get_mio_pin_status("usb1"); + if (mio_usb != ZYNQ_USB_NUM_MIO) { + printf("usb1 wrong num MIO: %d, Index %d\n", mio_usb, + index); + return -1; + } + ehci = (struct usb_ehci *)ZYNQ_USB_BASEADDR1; + } + + *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength); + *hcor = (struct ehci_hcor *)((uint32_t) *hccr + + HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase))); + + ulpi_vp.viewport_addr = (u32)&ehci->ulpi_viewpoint; + ulpi_vp.port_num = 0; + + ret = ulpi_init(&ulpi_vp); + if (ret) { + puts("zynq ULPI viewport init failed\n"); + return -1; + } + + /* ULPI set flags */ + ulpi_write(&ulpi_vp, &ulpi->otg_ctrl, + ULPI_OTG_DP_PULLDOWN | ULPI_OTG_DM_PULLDOWN | + ULPI_OTG_EXTVBUSIND); + ulpi_write(&ulpi_vp, &ulpi->function_ctrl, + ULPI_FC_FULL_SPEED | ULPI_FC_OPMODE_NORMAL | + ULPI_FC_SUSPENDM); + ulpi_write(&ulpi_vp, &ulpi->iface_ctrl, 0); + + /* Set VBus */ + ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set, + ULPI_OTG_DRVVBUS | ULPI_OTG_DRVVBUS_EXT); + + return 0; +} + +/* + * Destroy the appropriate control structures corresponding + * the the EHCI host controller. + */ +int ehci_hcd_stop(int index) +{ + struct usb_ehci *ehci; + + if (!index) + ehci = (struct usb_ehci *)ZYNQ_USB_BASEADDR0; + else + ehci = (struct usb_ehci *)ZYNQ_USB_BASEADDR1; + + /* Stop controller */ + writel(ZYNQ_USB_USBCMD_STOP, &ehci->usbcmd); + udelay(1000); + + /* Initiate controller reset */ + writel(ZYNQ_USB_USBCMD_RST, &ehci->usbcmd); + + return 0; +} |