Add OTG support
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65
app/sfo.c
65
app/sfo.c
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@ -1,67 +1,82 @@
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#include "sfo.h"
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#include <vitasdk.h>
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#include <string.h>
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#include <stdio.h>
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static uint8_t SFO_BUFFER[0x10000];
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#include <stdlib.h>
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#include "sfo.h"
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#include "io.h"
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#include "err.h"
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int read_sfo_key(char* key, char* out, char* sfo) {
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memset(SFO_BUFFER, 0x00, sizeof(SFO_BUFFER));
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int ret = 0;
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uint64_t sfo_size = get_file_size(sfo);
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if(sfo_size <= 0) ERROR(sfo_size);
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char* sfo_buffer = malloc(sfo_size);
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if(sfo_buffer == NULL) ERROR(-1);
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memset(sfo_buffer, 0x00, sfo_size);
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// open sfo file
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int sfo_fd = sceIoOpen(sfo, SCE_O_RDONLY, 0777);
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if(sfo_fd < 0) return sfo_fd;
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if(sfo_fd < 0) ERROR(sfo_fd);
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// read sfo
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int sfo_size = sceIoRead(sfo_fd, SFO_BUFFER, sizeof(SFO_BUFFER));
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int rd = sceIoRead(sfo_fd, sfo_buffer, sfo_size);
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if(rd != sfo_size) ERROR(-2);
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// close sfo
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sceIoClose(sfo_fd);
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if(sfo_size < 0) return sfo_size;
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if(sfo_size >= sizeof(SFO_BUFFER)) return -1;
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if(sfo_size <= sizeof(sfo_header)) return -2;
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if(sceIoClose(sfo_fd) >= 0)
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sfo_fd = 0;
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if(sfo_size <= sizeof(sfo_header)) ERROR(-3);
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// get sfo header
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sfo_header header;
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memcpy(&header, SFO_BUFFER, sizeof(sfo_header));
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memcpy(&header, sfo_buffer, sizeof(sfo_header));
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if(memcmp(header.magic, "\0PSF", sizeof(header.magic)) != 0) return -3; // check magic
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if(header.count > 200) return -4; // give up if more than 200 keys
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if(sfo_size < (sizeof(sfo_header) + (sizeof(sfo_key) * header.count))) return -5; // check if size is enough for keys + sfo header size
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if(memcmp(header.magic, "\0PSF", sizeof(header.magic)) != 0) ERROR(-4); // check magic
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if(header.count > 200) ERROR(-5); // give up if more than 200 keys
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if(sfo_size < (sizeof(sfo_header) + (sizeof(sfo_key) * header.count))) ERROR(-6); // check if size is enough for keys + sfo header size
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uint32_t ptr = sizeof(sfo_header);
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// read keys
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for(int i = 0; i < header.count; i++)
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{
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if(ptr >= sizeof(SFO_BUFFER)) return -6; // check for overflow
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if(ptr > sfo_size) ERROR(-7); // check for overflow
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char key_name[64];
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char key_value[64];
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sfo_key s_key;
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memcpy(&s_key, SFO_BUFFER+ptr, sizeof(sfo_key));
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memcpy(&s_key, sfo_buffer+ptr, sizeof(sfo_key));
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ptr += sizeof(sfo_key);
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if(s_key.type != PSF_TYPE_STR) continue;
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// calculate location of key in buffer
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int name_offset = header.key_offset + s_key.name_offset;
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if(name_offset > sfo_size) return -7;
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if(name_offset > sfo_size) ERROR(-8);
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int data_offset = header.value_offset + s_key.data_offset;
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if(data_offset > sfo_size) return -8;
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if(data_offset > sfo_size) ERROR(-9);
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// copy the key and value into buffers.
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strncpy(key_name, SFO_BUFFER + name_offset, sizeof(key_name)-1);
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strncpy(key_value, SFO_BUFFER + data_offset, sizeof(key_value)-1);
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strncpy(key_name, sfo_buffer + name_offset, sizeof(key_name)-1);
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strncpy(key_value, sfo_buffer + data_offset, sizeof(key_value)-1);
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if(strncmp(key_name, key, sizeof(key_name)) == 0){
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strncpy(out, key_value, sizeof(key_value)-1);
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return 0;
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ERROR(0);
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}
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}
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return -9;
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error:
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if(sfo_buffer != NULL)
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free(sfo_buffer);
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if(sfo_fd > 0)
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sceIoClose(sfo_fd);
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return ret;
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}
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@ -24,6 +24,7 @@ add_executable(${PROJECT_NAME}
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f00d.c
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io.c
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cobra.c
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otg.c
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format.c
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cmd56.c
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)
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@ -10,7 +10,8 @@ void _start() __attribute__((weak, alias("module_start")));
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int module_start(SceSize argc, const void *args)
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{
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cobra_patch(); // revert cobra blackfin patch
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cmd56_patch(); // patch cmd56 ..
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otg_patch(); // enable otg
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cmd56_patch(); // patch cmd56
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get_module_functions(); // get format stuff
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return SCE_KERNEL_START_SUCCESS;
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@ -20,5 +21,6 @@ int module_stop(SceSize argc, const void *args)
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{
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cobra_unpatch();
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cmd56_unpatch();
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otg_unpatch();
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return SCE_KERNEL_STOP_SUCCESS;
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}
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@ -0,0 +1,92 @@
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#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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// start from here, technically the module is actually in os0 bootimage
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// but cannot start after system already started, unfortunately.
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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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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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}
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@ -0,0 +1,2 @@
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int otg_patch();
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int otg_unpatch();
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