ohci.c

   1 /*
   2        mini - a Free Software replacement for the Nintendo/BroadOn IOS.
   3        ohci hardware support
   4
   5 Copyright (C) 2009     Bernhard Urban <lewurm@gmx.net>
   6 Copyright (C) 2009     Sebastian Falbesoner <sebastian.falbesoner@gmail.com>
   7
   8 # This code is licensed to you under the terms of the GNU GPL, version 2;
   9 # see file COPYING or http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
  10 */
  11
  12 #include "bootmii_ppc.h"
  13 #include "ohci.h"
  14 #include "irq.h"
  15
  16 #define gecko_printf printf
  17 #define dma_addr(address) virt_to_phys(address)
  18
  19
  20 static struct ohci_hcca hcca_oh0;
  21
  22 static void dbg_op_state() {
  23        switch (read32(OHCI0_HC_CONTROL) & OHCI_CTRL_HCFS) {
  24                case OHCI_USB_SUSPEND:
  25                        gecko_printf("ohci-- OHCI_USB_SUSPEND\n");
  26                        break;
  27                case OHCI_USB_RESET:
  28                        gecko_printf("ohci-- OHCI_USB_RESET\n");
  29                        break;
  30                case OHCI_USB_OPER:
  31                        gecko_printf("ohci-- OHCI_USB_OPER\n");
  32                        break;
  33                case OHCI_USB_RESUME:
  34                        gecko_printf("ohci-- OHCI_USB_RESUME\n");
  35                        break;
  36        }
  37 }
  38
  39 void ohci_init() {
  40        gecko_printf("ohci-- init\n");
  41        dbg_op_state();
  42        /*
  43        u32 i = 0;
  44        for(; i <= 0x200; i+=4) {
  45                gecko_printf("0x0d050000 + %X: %X\n", i, read32(0x0d050000+i));
  46                udelay(10000); //'cause usb gecko is lame
  47        }
  48        * see output in ohci.default
  49        */
  50
  51        /* enable interrupts of both usb host controllers */
  52        set32(EHCI_CTL, EHCI_CTL_OH0INTE | EHCI_CTL_OH1INTE | 0xe0000);
  53
  54        /* reset HC */
  55        set32(OHCI0_HC_COMMAND_STATUS, OHCI_HCR);
  56
  57        /* wait max. 30us */
  58        u32 ts = 30;
  59        while ((read32(OHCI0_HC_COMMAND_STATUS) & OHCI_HCR) != 0) {
  60                if(--ts == 0) {
  61                        gecko_printf("ohci-- FAILED");
  62                        return;
  63                }
  64                udelay(1);
  65        }
  66
  67        /* disable interrupts; 2ms timelimit here!
  68           now we're in the SUSPEND state ... must go OPERATIONAL
  69           within 2msec else HC enters RESUME */
  70
  71
  72            u32 cookie = irq_kill();
  73
  74        /* Tell the controller where the control and bulk lists are
  75         * The lists are empty now. */
  76        write32(OHCI0_HC_CTRL_HEAD_ED, 0);
  77        write32(OHCI0_HC_BULK_HEAD_ED, 0);
  78
  79        /* set hcca adress */
  80        write32(OHCI0_HC_HCCA, dma_addr(&hcca_oh0));
  81
  82        /* set periodicstart */
  83 #define FIT (1<<31)
  84        u32 fmInterval = read32(OHCI0_HC_FM_INTERVAL) &0x3fff;
  85        u32 fit = read32(OHCI0_HC_FM_INTERVAL) & FIT;
  86
  87        write32(OHCI0_HC_FM_INTERVAL, read32(OHCI0_HC_FM_INTERVAL) | (fit ^ FIT));
  88        write32(OHCI0_HC_PERIODIC_START, ((9*fmInterval)/10)&0x3fff);
  89
  90        /* testing bla */
  91        if ((read32(OHCI0_HC_FM_INTERVAL) & 0x3fff0000) == 0 || !read32(OHCI0_HC_PERIODIC_START)) {
  92                gecko_printf("ohci-- w00t, fail!! see ohci-hcd.c:669\n");
  93        }
  94
  95        /* start HC operations */
  96        set32(OHCI0_HC_CONTROL, OHCI_CONTROL_INIT | OHCI_USB_OPER);
  97
  98        /* wake on ConnectStatusChange, matching external hubs */
  99        set32(OHCI0_HC_RH_STATUS, RH_HS_DRWE);
 100
 101        /* Choose the interrupts we care about now, others later on demand */
 102        write32(OHCI0_HC_INT_STATUS, ~0);
 103        write32(OHCI0_HC_INT_ENABLE, OHCI_INTR_INIT);
 104
 105
 106        irq_restore(cookie);
 107
 108        dbg_op_state();
 109 }
 110