mirror of
https://github.com/dborth/snes9xgx.git
synced 2024-12-30 21:21:50 +01:00
123 lines
3.0 KiB
C
123 lines
3.0 KiB
C
#ifdef HW_RVL
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#include <gccore.h>
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static bool retrodeSetup = false;
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static s32 deviceIdRetrode = 0;
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static u8 endpointRetrode = 0;
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static u8 bMaxPacketSizeRetrode = 0;
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static u32 jpRetrode[4];
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static bool isRetrodeGamepad(usb_devdesc devdesc)
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{
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if (devdesc.idVendor != 0x0403 || devdesc.idProduct != 0x97C1 ||
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devdesc.configurations == NULL || devdesc.configurations->interfaces == NULL ||
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devdesc.configurations->interfaces->endpoints == NULL)
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{
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return false;
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}
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return devdesc.configurations->interfaces->bInterfaceSubClass == 0;
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}
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static u8 getEndpoint(usb_devdesc devdesc)
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{
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if (devdesc.configurations == NULL || devdesc.configurations->interfaces == NULL ||
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devdesc.configurations->interfaces->endpoints == NULL)
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{
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return -1;
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}
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return devdesc.configurations->interfaces->endpoints->bEndpointAddress;
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}
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static void openRetrode()
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{
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usb_device_entry dev_entry[8];
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u8 dev_count;
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if (USB_GetDeviceList(dev_entry, 8, USB_CLASS_HID, &dev_count) < 0)
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{
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return;
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}
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// Retrode has two entries in USB_GetDeviceList(), one for gamepads and one for SNES mouse
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for (int i = 0; i < dev_count; ++i)
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{
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s32 fd;
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if (USB_OpenDevice(dev_entry[i].device_id, dev_entry[i].vid, dev_entry[i].pid, &fd) < 0)
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{
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continue;
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}
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usb_devdesc devdesc;
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if (USB_GetDescriptors(fd, &devdesc) < 0 || !isRetrodeGamepad(devdesc))
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{
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USB_CloseDevice(&fd);
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continue;
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}
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deviceIdRetrode = fd;
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endpointRetrode = getEndpoint(devdesc);
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bMaxPacketSizeRetrode = devdesc.bMaxPacketSize0;
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}
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}
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void Retrode_ScanPads()
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{
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if(!retrodeSetup)
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{
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retrodeSetup = true;
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openRetrode();
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}
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if (deviceIdRetrode == 0)
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{
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return;
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}
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uint8_t ATTRIBUTE_ALIGN(32) buf[bMaxPacketSizeRetrode];
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if (USB_ReadIntrMsg(deviceIdRetrode, endpointRetrode, sizeof(buf), buf) != 5)
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{
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return;
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}
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// buf[0] contains the port returned
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// you have to make 4 calls to get the status, even if you are only interested in one port
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// because it is not sure which port is returned first
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// 1 = left SNES
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// 2 = right SNES
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// 3 = left Genesis/MD
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// 4 = right Genesis/MD
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// Retrode gamepad endpoint returns 5 bytes with gamepad events
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u32 jp12 = 0;
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jp12 |= ((buf[2] & 0x9C) == 0x9C) ? PAD_BUTTON_UP : 0;
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jp12 |= ((buf[2] & 0x64) == 0x64) ? PAD_BUTTON_DOWN : 0;
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jp12 |= ((buf[1] & 0x9C) == 0x9C) ? PAD_BUTTON_LEFT : 0;
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jp12 |= ((buf[1] & 0x64) == 0x64) ? PAD_BUTTON_RIGHT : 0;
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jp12 |= (buf[3] & 0x10) ? PAD_BUTTON_A : 0;
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jp12 |= (buf[3] & 0x01) ? PAD_BUTTON_B : 0;
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jp12 |= (buf[3] & 0x20) ? PAD_BUTTON_X : 0;
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jp12 |= (buf[3] & 0x02) ? PAD_BUTTON_Y : 0;
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jp12 |= (buf[3] & 0x40) ? PAD_TRIGGER_L : 0;
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jp12 |= (buf[3] & 0x80) ? PAD_TRIGGER_R : 0;
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jp12 |= (buf[3] & 0x08) ? PAD_BUTTON_START : 0;
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jp12 |= (buf[3] & 0x04) ? PAD_TRIGGER_Z : 0; // SNES select button maps to Z
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// Required, otherwise if the returned port isn't the one we are looking for, jp will be set to zero,
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// and held buttons are not possible w/o saving the state.
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jpRetrode[buf[0] - 1] = jp12;
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}
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u32 Retrode_ButtonsHeld(int chan)
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{
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if (deviceIdRetrode == 0)
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{
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return 0;
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}
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return jpRetrode[chan];
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}
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#endif
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