firmware/drivers/arcotg_udc.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2007 by Barry Wardell
  11  *
  12  * Based on code from the Linux Target Image Builder from Freescale
  13  * available at http://www.bitshrine.org/ and
  14  * http://www.bitshrine.org/gpp/linux-2.6.16-mx31-usb-2.patch
  15  * Adapted for Rockbox in January 2007
  16  * Original file: drivers/usb/gadget/arcotg_udc.c
  17  *
  18  * USB Device Controller Driver
  19  * Driver for ARC OTG USB module in the i.MX31 platform, etc.
  20  *
  21  * Copyright 2004-2006 Freescale Semiconductor, Inc. All Rights Reserved.
  22  *
  23  * Based on mpc-udc.h
  24  * Author: Li Yang (leoli@freescale.com)
  25  *         Jiang Bo (Tanya.jiang@freescale.com)
  26  *
  27  * All files in this archive are subject to the GNU General Public License.
  28  * See the file COPYING in the source tree root for full license agreement.
  29  *
  30  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  31  * KIND, either express or implied.
  32  *
  33  ****************************************************************************/
  34 #include "arcotg_udc.h"
  35 #include "logf.h"
  36
  37 static int timeout;
  38
  39 /* @qh_addr is the aligned virt addr of ep QH addr
  40  * it is used to set endpointlistaddr Reg */
  41 /* was static int dr_controller_setup(void *qh_addr) */
  42 int dr_controller_setup(void)
  43 {
  44 #if 0
  45     struct arc_usb_config *config;
  46
  47     config = udc_controller->config;
  48
  49     /* before here, make sure usb_slave_regs has been initialized */
  50     if (!qh_addr)
  51         return -EINVAL;
  52 #endif
  53
  54     /* Stop and reset the usb controller */
  55     UDC_USBCMD &= ~USB_CMD_RUN_STOP;
  56
  57     UDC_USBCMD |= USB_CMD_CTRL_RESET;
  58
  59     /* Wait for reset to complete */
  60     timeout = 10000000;
  61     while ((UDC_USBCMD & USB_CMD_CTRL_RESET) &&
  62            --timeout) {
  63         continue;
  64     }
  65     if (timeout == 0) {
  66         logf("%s: TIMEOUT", __FUNCTION__);
  67         return -ETIMEDOUT;
  68     }
  69
  70     /* Set the controller as device mode and disable setup lockout */
  71     UDC_USBMODE |= (USB_MODE_CTRL_MODE_DEVICE | USB_MODE_SETUP_LOCK_OFF);
  72
  73     /* Clear the setup status */
  74     UDC_USBSTS = 0;
  75 #if 0
  76     UDC_ENDPOINTLISTADDR = (unsigned int)qh_addr & USB_EP_LIST_ADDRESS_MASK;
  77
  78     VDBG("qh_addr=0x%x epla_reg=0x%8x", qh_addr, UOG_ASYNCLISTADDR);
  79 #endif
  80     UDC_PORTSC1 = (UDC_PORTSC1 & ~PORTSCX_PHY_TYPE_SEL) | PORTSCX_PTS_UTMI;
  81 #if 0
  82     if (config->set_vbus_power)
  83         config->set_vbus_power(0);
  84 #endif
  85
  86     return 0;
  87 }
  88
  89 /* just Enable DR irq reg and Set Dr controller Run */
  90 /* was static void dr_controller_run(struct arcotg_udc *udc) */
  91 void dr_controller_run(void)
  92 {
  93     /*Enable DR irq reg */
  94     UDC_USBINTR = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN |
  95           USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN |
  96           USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
  97 #if 0
  98     /* Clear stopped bit */
  99     udc->stopped = 0;
 100 #endif
 101     /* Set the controller as device mode */
 102     UDC_USBMODE |= USB_MODE_CTRL_MODE_DEVICE;
 103
 104     /* Set controller to Run */
 105     UDC_USBCMD |= USB_CMD_RUN_STOP;
 106
 107     return;
 108 }
 109
 110 /* just Enable DR irq reg and Set Dr controller Run */
 111 /* was static void dr_controller_stop(struct arcotg_udc *udc) */
 112 void dr_controller_stop(void)
 113 {
 114 #if 0
 115    /* if we're in OTG mode, and the Host is currently using the port,
 116     * stop now and don't rip the controller out from under the
 117     * ehci driver
 118     */
 119    if (udc->gadget.is_otg) {
 120        if (!(UDC_OTGSC & OTGSC_STS_USB_ID)) {
 121            logf("Leaving early");
 122            return;
 123        }
 124    }
 125 #endif
 126
 127     /* disable all INTR */
 128     UDC_USBINTR = 0;
 129 #if 0
 130     /* Set stopped bit */
 131     udc->stopped = 1;
 132 #endif
 133     /* Set controller to Stop */
 134     UDC_USBCMD &= ~USB_CMD_RUN_STOP;
 135 }