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https://github.com/brain-hackers/u-boot-brain
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![Vivek Gautam](/assets/img/avatar_default.png)
Enabling the non-dt path for the driver so that we don't get any build errors for non-dt configuration. Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com> Acked-by: Simon Glass <sjg@chromium.org>
191 lines
4.6 KiB
C
191 lines
4.6 KiB
C
/*
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* SAMSUNG EXYNOS USB HOST EHCI Controller
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*
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* Copyright (C) 2012 Samsung Electronics Co.Ltd
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* Vivek Gautam <gautam.vivek@samsung.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#include <common.h>
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#include <fdtdec.h>
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#include <libfdt.h>
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#include <malloc.h>
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#include <usb.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/ehci.h>
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#include <asm/arch/system.h>
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#include <asm/arch/power.h>
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#include <asm-generic/errno.h>
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#include <linux/compat.h>
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#include "ehci.h"
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/* Declare global data pointer */
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* Contains pointers to register base addresses
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* for the usb controller.
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*/
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struct exynos_ehci {
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struct exynos_usb_phy *usb;
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struct ehci_hccr *hcd;
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};
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static struct exynos_ehci exynos;
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#ifdef CONFIG_OF_CONTROL
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static int exynos_usb_parse_dt(const void *blob, struct exynos_ehci *exynos)
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{
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fdt_addr_t addr;
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unsigned int node;
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int depth;
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node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_EHCI);
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if (node <= 0) {
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debug("EHCI: Can't get device node for ehci\n");
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return -ENODEV;
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}
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/*
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* Get the base address for EHCI controller from the device node
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*/
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addr = fdtdec_get_addr(blob, node, "reg");
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if (addr == FDT_ADDR_T_NONE) {
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debug("Can't get the EHCI register address\n");
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return -ENXIO;
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}
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exynos->hcd = (struct ehci_hccr *)addr;
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depth = 0;
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node = fdtdec_next_compatible_subnode(blob, node,
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COMPAT_SAMSUNG_EXYNOS_USB_PHY, &depth);
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if (node <= 0) {
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debug("EHCI: Can't get device node for usb-phy controller\n");
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return -ENODEV;
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}
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/*
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* Get the base address for usbphy from the device node
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*/
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exynos->usb = (struct exynos_usb_phy *)fdtdec_get_addr(blob, node,
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"reg");
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if (exynos->usb == NULL) {
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debug("Can't get the usbphy register address\n");
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return -ENXIO;
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}
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return 0;
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}
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#endif
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/* Setup the EHCI host controller. */
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static void setup_usb_phy(struct exynos_usb_phy *usb)
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{
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set_usbhost_mode(USB20_PHY_CFG_HOST_LINK_EN);
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set_usbhost_phy_ctrl(POWER_USB_HOST_PHY_CTRL_EN);
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clrbits_le32(&usb->usbphyctrl0,
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HOST_CTRL0_FSEL_MASK |
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HOST_CTRL0_COMMONON_N |
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/* HOST Phy setting */
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HOST_CTRL0_PHYSWRST |
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HOST_CTRL0_PHYSWRSTALL |
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HOST_CTRL0_SIDDQ |
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HOST_CTRL0_FORCESUSPEND |
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HOST_CTRL0_FORCESLEEP);
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setbits_le32(&usb->usbphyctrl0,
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/* Setting up the ref freq */
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(CLK_24MHZ << 16) |
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/* HOST Phy setting */
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HOST_CTRL0_LINKSWRST |
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HOST_CTRL0_UTMISWRST);
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udelay(10);
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clrbits_le32(&usb->usbphyctrl0,
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HOST_CTRL0_LINKSWRST |
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HOST_CTRL0_UTMISWRST);
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udelay(20);
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/* EHCI Ctrl setting */
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setbits_le32(&usb->ehcictrl,
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EHCICTRL_ENAINCRXALIGN |
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EHCICTRL_ENAINCR4 |
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EHCICTRL_ENAINCR8 |
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EHCICTRL_ENAINCR16);
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}
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/* Reset the EHCI host controller. */
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static void reset_usb_phy(struct exynos_usb_phy *usb)
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{
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/* HOST_PHY reset */
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setbits_le32(&usb->usbphyctrl0,
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HOST_CTRL0_PHYSWRST |
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HOST_CTRL0_PHYSWRSTALL |
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HOST_CTRL0_SIDDQ |
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HOST_CTRL0_FORCESUSPEND |
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HOST_CTRL0_FORCESLEEP);
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set_usbhost_phy_ctrl(POWER_USB_HOST_PHY_CTRL_DISABLE);
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}
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/*
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* EHCI-initialization
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* Create the appropriate control structures to manage
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* a new EHCI host controller.
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*/
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int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
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{
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struct exynos_ehci *ctx = &exynos;
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#ifdef CONFIG_OF_CONTROL
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if (exynos_usb_parse_dt(gd->fdt_blob, ctx)) {
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debug("Unable to parse device tree for ehci-exynos\n");
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return -ENODEV;
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}
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#else
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ctx->usb = (struct exynos_usb_phy *)samsung_get_base_usb_phy();
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ctx->hcd = (struct ehci_hccr *)samsung_get_base_usb_ehci();
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#endif
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setup_usb_phy(ctx->usb);
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*hccr = ctx->hcd;
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*hcor = (struct ehci_hcor *)((uint32_t) *hccr
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+ HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
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debug("Exynos5-ehci: init hccr %x and hcor %x hc_length %d\n",
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(uint32_t)*hccr, (uint32_t)*hcor,
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(uint32_t)HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
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return 0;
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}
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/*
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* Destroy the appropriate control structures corresponding
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* the EHCI host controller.
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*/
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int ehci_hcd_stop(int index)
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{
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struct exynos_ehci *ctx = &exynos;
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reset_usb_phy(ctx->usb);
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return 0;
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}
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