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https://github.com/AsahiLinux/u-boot
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5b591502f9
The patch adds the EHCI controller for the i.MX31 Soc. Signed-off-by: Stefano Babic <sbabic@denx.de>
130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
/*
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* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* 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 Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <common.h>
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#include <usb.h>
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#include <asm/io.h>
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#include <asm/arch/mx31-regs.h>
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#include <usb/ehci-fsl.h>
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#include <errno.h>
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#include "ehci.h"
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#include "ehci-core.h"
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#define USBCTRL_OTGBASE_OFFSET 0x600
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#define MX31_OTG_SIC_SHIFT 29
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#define MX31_OTG_SIC_MASK (0x3 << MX31_OTG_SIC_SHIFT)
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#define MX31_OTG_PM_BIT (1 << 24)
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#define MX31_H2_SIC_SHIFT 21
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#define MX31_H2_SIC_MASK (0x3 << MX31_H2_SIC_SHIFT)
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#define MX31_H2_PM_BIT (1 << 16)
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#define MX31_H2_DT_BIT (1 << 5)
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#define MX31_H1_SIC_SHIFT 13
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#define MX31_H1_SIC_MASK (0x3 << MX31_H1_SIC_SHIFT)
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#define MX31_H1_PM_BIT (1 << 8)
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#define MX31_H1_DT_BIT (1 << 4)
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static int mxc_set_usbcontrol(int port, unsigned int flags)
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{
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unsigned int v;
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#ifdef CONFIG_MX31
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v = readl(MX31_OTG_BASE_ADDR + USBCTRL_OTGBASE_OFFSET);
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switch (port) {
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case 0: /* OTG port */
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v &= ~(MX31_OTG_SIC_MASK | MX31_OTG_PM_BIT);
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v |= (flags & MXC_EHCI_INTERFACE_MASK)
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<< MX31_OTG_SIC_SHIFT;
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if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
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v |= MX31_OTG_PM_BIT;
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break;
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case 1: /* H1 port */
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v &= ~(MX31_H1_SIC_MASK | MX31_H1_PM_BIT |
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MX31_H1_DT_BIT);
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v |= (flags & MXC_EHCI_INTERFACE_MASK)
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<< MX31_H1_SIC_SHIFT;
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if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
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v |= MX31_H1_PM_BIT;
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if (!(flags & MXC_EHCI_TTL_ENABLED))
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v |= MX31_H1_DT_BIT;
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break;
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case 2: /* H2 port */
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v &= ~(MX31_H2_SIC_MASK | MX31_H2_PM_BIT |
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MX31_H2_DT_BIT);
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v |= (flags & MXC_EHCI_INTERFACE_MASK)
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<< MX31_H2_SIC_SHIFT;
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if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
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v |= MX31_H2_PM_BIT;
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if (!(flags & MXC_EHCI_TTL_ENABLED))
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v |= MX31_H2_DT_BIT;
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break;
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default:
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return -EINVAL;
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}
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writel(v, MX31_OTG_BASE_ADDR +
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USBCTRL_OTGBASE_OFFSET);
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#endif
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return 0;
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}
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int ehci_hcd_init(void)
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{
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u32 tmp;
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struct usb_ehci *ehci;
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struct clock_control_regs *sc_regs =
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(struct clock_control_regs *)CCM_BASE;
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tmp = __raw_readl(&sc_regs->ccmr);
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__raw_writel(__raw_readl(&sc_regs->ccmr) | (1 << 9), &sc_regs->ccmr) ;
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udelay(80);
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/* Take USB2 */
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ehci = (struct usb_ehci *)(MX31_OTG_BASE_ADDR +
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(0x200 * CONFIG_MXC_USB_PORT));
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hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
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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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setbits_le32(&ehci->usbmode, CM_HOST);
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setbits_le32(&ehci->control, USB_EN);
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__raw_writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc);
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mxc_set_usbcontrol(CONFIG_MXC_USB_PORT, CONFIG_MXC_USB_FLAGS);
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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 the EHCI host controller.
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*/
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int ehci_hcd_stop(void)
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{
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return 0;
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}
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