cpu/ppc4xx/usbdev.c

   1 /*USB 1.1,2.0 device*/
   2
   3 #include <common.h>
   4 #include <asm/processor.h>
   5
   6 #if (defined(CONFIG_440EP) || defined(CONFIG_440EPX)) && defined(CONFIG_CMD_USB)
   7
   8 #include <usb.h>
   9 #include "usbdev.h"
  10 #include <asm/ppc4xx-intvec.h>
  11
  12 #define USB_DT_DEVICE        0x01
  13 #define USB_DT_CONFIG        0x02
  14 #define USB_DT_STRING        0x03
  15 #define USB_DT_INTERFACE     0x04
  16 #define USB_DT_ENDPOINT      0x05
  17
  18 int set_value = -1;
  19
  20 void process_endpoints(unsigned short usb2d0_intrin)
  21 {
  22         /*will hold the packet received */
  23         struct usb_device_descriptor usb_device_packet;
  24         struct usb_config_descriptor usb_config_packet;
  25         struct usb_string_descriptor usb_string_packet;
  26         struct devrequest setup_packet;
  27         unsigned int *setup_packet_pt;
  28         unsigned char *packet_pt = NULL;
  29         int temp, temp1;
  30
  31         int i;
  32
  33         /*printf("{USB device} - endpoint 0x%X \n", usb2d0_intrin); */
  34
  35         /*set usb address, seems to not work unless it is done in the next
  36            interrupt, so that is why it is done this way */
  37         if (set_value != -1)
  38                 *(unsigned char *)USB2D0_FADDR_8 = (unsigned char)set_value;
  39
  40         /*endpoint 1 */
  41         if (usb2d0_intrin & 0x01) {
  42                 setup_packet_pt = (unsigned int *)&setup_packet;
  43
  44                 /*copy packet */
  45                 setup_packet_pt[0] = *(unsigned int *)USB2D0_FIFO_0;
  46                 setup_packet_pt[1] = *(unsigned int *)USB2D0_FIFO_0;
  47                 temp = *(unsigned int *)USB2D0_FIFO_0;
  48                 temp1 = *(unsigned int *)USB2D0_FIFO_0;
  49
  50                 /*do some swapping */
  51                 setup_packet.value = swap_16(setup_packet.value);
  52                 setup_packet.index = swap_16(setup_packet.index);
  53                 setup_packet.length = swap_16(setup_packet.length);
  54
  55                 /*clear rx packet */
  56                 *(unsigned short *)USB2D0_INCSR0_8 = 0x48;
  57
  58                 /*printf("0x%X 0x%X 0x%X 0x%X 0x%X 0x%X 0x%X\n", setup_packet.requesttype,
  59                    setup_packet.request, setup_packet.value,
  60                    setup_packet.index, setup_packet.length, temp, temp1 ); */
  61
  62                 switch (setup_packet.request) {
  63                 case USB_REQ_GET_DESCRIPTOR:
  64
  65                         switch (setup_packet.value >> 8) {
  66                         case USB_DT_DEVICE:
  67                                 /*create packet */
  68                                 usb_device_packet.bLength = 18;
  69                                 usb_device_packet.bDescriptorType =
  70                                     USB_DT_DEVICE;
  71 #ifdef USB_2_0_DEVICE
  72                                 usb_device_packet.bcdUSB = swap_16(0x200);
  73 #else
  74                                 usb_device_packet.bcdUSB = swap_16(0x110);
  75 #endif
  76                                 usb_device_packet.bDeviceClass = 0xff;
  77                                 usb_device_packet.bDeviceSubClass = 0;
  78                                 usb_device_packet.bDeviceProtocol = 0;
  79                                 usb_device_packet.bMaxPacketSize0 = 32;
  80                                 usb_device_packet.idVendor = swap_16(1);
  81                                 usb_device_packet.idProduct = swap_16(2);
  82                                 usb_device_packet.bcdDevice = swap_16(0x300);
  83                                 usb_device_packet.iManufacturer = 1;
  84                                 usb_device_packet.iProduct = 1;
  85                                 usb_device_packet.iSerialNumber = 1;
  86                                 usb_device_packet.bNumConfigurations = 1;
  87
  88                                 /*put packet in fifo */
  89                                 packet_pt = (unsigned char *)&usb_device_packet;
  90                                 break;
  91
  92                         case USB_DT_CONFIG:
  93                                 /*create packet */
  94                                 usb_config_packet.bLength = 9;
  95                                 usb_config_packet.bDescriptorType =
  96                                     USB_DT_CONFIG;
  97                                 usb_config_packet.wTotalLength = swap_16(25);
  98                                 usb_config_packet.bNumInterfaces = 1;
  99                                 usb_config_packet.bConfigurationValue = 1;
 100                                 usb_config_packet.iConfiguration = 0;
 101                                 usb_config_packet.bmAttributes = 0x40;
 102                                 usb_config_packet.MaxPower = 0;
 103
 104                                 /*put packet in fifo */
 105                                 packet_pt = (unsigned char *)&usb_config_packet;
 106                                 break;
 107
 108                         case USB_DT_STRING:
 109                                 /*create packet */
 110                                 usb_string_packet.bLength = 2;
 111                                 usb_string_packet.bDescriptorType =
 112                                     USB_DT_STRING;
 113                                 usb_string_packet.wData[0] = 0x0094;
 114
 115                                 /*put packet in fifo */
 116                                 packet_pt = (unsigned char *)&usb_string_packet;
 117                                 break;
 118                         }
 119
 120                         /*put packet in fifo */
 121                         for (i = 0; i < (setup_packet.length); i++) {
 122                                 *(unsigned char *)USB2D0_FIFO_0 = packet_pt[i];
 123                         }
 124
 125                         /*give tx command */
 126                         *(unsigned short *)USB2D0_INCSR0_8 = 0x0a;
 127
 128                         break;
 129
 130                 case USB_REQ_SET_ADDRESS:
 131
 132                         /*copy usb address */
 133                         set_value = setup_packet.value;
 134
 135                         break;
 136                 }
 137
 138         }
 139 }
 140
 141 void process_other(unsigned char usb2d0_intrusb)
 142 {
 143
 144         /*check for sof */
 145         if (usb2d0_intrusb & 0x08) {
 146                 /*printf("{USB device} - sof detected\n"); */
 147         }
 148
 149         /*check for reset */
 150         if (usb2d0_intrusb & 0x04) {
 151                 /*printf("{USB device} - reset detected\n"); */
 152
 153                 /*copy usb address of zero, need to do this when usb reset */
 154                 set_value = 0;
 155         }
 156
 157         if (usb2d0_intrusb & 0x02) {
 158                 /*printf("{USB device} - resume detected\n"); */
 159         }
 160
 161         if (usb2d0_intrusb & 0x01) {
 162                 /*printf("{USB device} - suspend detected\n"); */
 163         }
 164 }
 165
 166 int usbInt(void)
 167 {
 168         /*Must read these 2 registers and use values to clear interrupts.  If you
 169            do not read them then the interrupt will not be cleared.  If you do not
 170            use the variable the optimizer will not do a read. */
 171         volatile unsigned short usb2d0_intrin =
 172             *(unsigned short *)USB2D0_INTRIN_16;
 173         volatile unsigned char usb2d0_intrusb =
 174             *(unsigned char *)USB2D0_INTRUSB_8;
 175
 176         /*check if there was an endpoint interrupt */
 177         if (usb2d0_intrin != 0) {
 178                 process_endpoints(usb2d0_intrin);
 179         }
 180
 181         /*check for other interrupts */
 182         if (usb2d0_intrusb != 0) {
 183                 process_other(usb2d0_intrusb);
 184         }
 185
 186         return 0;
 187 }
 188
 189 #if defined(CONFIG_440EPX)
 190 void usb_dev_init()
 191 {
 192         printf("USB 2.0 Device init\n");
 193
 194         /*usb dev init */
 195         *(unsigned char *)USB2D0_POWER_8 = 0xa1;        /* 2.0 */
 196
 197         /*enable interrupts */
 198         *(unsigned char *)USB2D0_INTRUSBE_8 = 0x0f;
 199
 200         irq_install_handler(VECNUM_HSB2D, (interrupt_handler_t *) usbInt,
 201                             NULL);
 202 }
 203 #else
 204 void usb_dev_init()
 205 {
 206 #ifdef USB_2_0_DEVICE
 207         printf("USB 2.0 Device init\n");
 208         /*select 2.0 device */
 209         mtsdr(sdr_usb0, 0x0);   /* 2.0 */
 210
 211         /*usb dev init */
 212         *(unsigned char *)USB2D0_POWER_8 = 0xa1;        /* 2.0 */
 213 #else
 214         printf("USB 1.1 Device init\n");
 215         /*select 1.1 device */
 216         mtsdr(sdr_usb0, 0x2);   /* 1.1 */
 217
 218         /*usb dev init */
 219         *(unsigned char *)USB2D0_POWER_8 = 0xc0;        /* 1.1 */
 220 #endif
 221
 222         /*enable interrupts */
 223         *(unsigned char *)USB2D0_INTRUSBE_8 = 0x0f;
 224
 225         irq_install_handler(VECNUM_USBDEV, (interrupt_handler_t *) usbInt,
 226                             NULL);
 227 }
 228 #endif
 229
 230 #endif /* CONFIG_440EP || CONFIG_440EPX */