95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
#include "log.h"
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#include <vitasdkkern.h>
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#include <taihen.h>
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#include <stdint.h>
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SceUID sceSysconSetOtgPowerLevelHook = -1;
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static tai_hook_ref_t sceSysconSetOtgPowerLevelHookRef;
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static int return_1() {
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return 1;
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}
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// shamelessly stolen from dots_tb
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static SceUID sceSysconSetOtgPowerLevel_patched(uint32_t *pwr_val) {
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SceUID ret, state;
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ENTER_SYSCALL(state);
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ret = TAI_CONTINUE(SceUID, sceSysconSetOtgPowerLevelHookRef, pwr_val);
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PRINT_STR("sceSysconSetOtgPowerLevel original %x\n", *pwr_val);
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if(*pwr_val == 0x700)
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PRINT_STR("sceSysconSetOtgPowerLevel new %x\n\n", *pwr_val = 0x200);
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EXIT_SYSCALL(state);
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return ret;
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}
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// force load usb mass storage plugin on all devices
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int load_umass() {
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if(ksceKernelSearchModuleByName("SceUsbMass") < 0) {
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tai_hook_ref_t ksceSysrootIsSafeModeHookRef;
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tai_hook_ref_t ksceSblAimgrIsDolceHookRef;
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// temporarily patch isSafeMode and isDolce
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SceUID ksceSysrootIsSafeModeHook = taiHookFunctionExportForKernel(KERNEL_PID,
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&ksceSysrootIsSafeModeHookRef,
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"SceSysmem",
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0x2ED7F97A, // SceSysrootForKernel
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0x834439A7, // ksceSysrootIsSafemode
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return_1);
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PRINT_STR("ksceSysrootIsSafeModeHook 0x%04X\n", ksceSysrootIsSafeModeHook);
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PRINT_STR("ksceSysrootIsSafeModeHookRef 0x%04X\n", ksceSysrootIsSafeModeHookRef);
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SceUID ksceSblAimgrIsDolceHook = taiHookFunctionExportForKernel(KERNEL_PID,
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&ksceSblAimgrIsDolceHookRef,
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"SceSysmem",
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0xFD00C69A, // SceSblAIMgrForDriver
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0x71608CA3, // ksceSblAimgrIsDolce
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return_1);
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PRINT_STR("ksceSblAimgrIsDolceHook 0x%04X\n", ksceSblAimgrIsDolceHook);
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PRINT_STR("ksceSblAimgrIsDolceHookRef 0x%04X\n", ksceSblAimgrIsDolceHookRef);
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// load from the bootimage
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SceUID umass_modid = ksceKernelLoadStartModule("ux0:VitaShell/module/umass.skprx", 0, NULL, 0, NULL, NULL);
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PRINT_STR("Load umass.skprx 0x%04X\n", umass_modid);
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// release hooks
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if(ksceSysrootIsSafeModeHook > 0) taiHookReleaseForKernel(ksceSysrootIsSafeModeHook, ksceSysrootIsSafeModeHookRef);
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if(ksceSblAimgrIsDolceHook > 0) taiHookReleaseForKernel(ksceSblAimgrIsDolceHook, ksceSblAimgrIsDolceHookRef);
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if(umass_modid < 0) return umass_modid;
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}
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else{
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PRINT_STR("umass.skprx already running\n");
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}
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return 0;
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}
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int otg_patch() {
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// improve compatibility with OTG connectors
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sceSysconSetOtgPowerLevelHook = taiHookFunctionImportForKernel(KERNEL_PID,
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&sceSysconSetOtgPowerLevelHookRef,
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"SceUsbServ",
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TAI_ANY_LIBRARY,
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0xD6F6D472, // sceSysconSetOtgPowerLevel
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sceSysconSetOtgPowerLevel_patched);
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PRINT_STR("sceSysconSetOtgPowerLevelHook 0x%04X\n", sceSysconSetOtgPowerLevelHook);
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PRINT_STR("sceSysconSetOtgPowerLevelHookRef 0x%04X\n", sceSysconSetOtgPowerLevelHookRef);
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// allow loading usb storage on regular vita
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load_umass();
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return 0;
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}
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int otg_unpatch() {
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if(sceSysconSetOtgPowerLevelHook >= 0) taiHookReleaseForKernel(sceSysconSetOtgPowerLevelHook, sceSysconSetOtgPowerLevelHookRef);
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return 0;
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} |