/* Main state machine and register implementation for OpenPICC * (C) 2006 by Harald Welte <hwelte@hmw-consulting.de> */ #include <sys/types.h> #include <openpcd.h> #include <openpicc_regs.h> #include <openpicc.h> #include <os/req_ctx.h> #include <os/usb_handler.h> #include "opicc_reg.h" /******************************************************************** * OpenPICC Register set ********************************************************************/ #ifdef DEBUG /* Our registers, including their power-up default values */ static u_int16_t opicc_regs[_OPICC_NUM_REGS] = { [OPICC_REG_14443A_UIDLEN] = 4, [OPICC_REG_14443A_FDT0] = 1236, [OPICC_REG_14443A_FDT1] = 1172, [OPICC_REG_14443A_STATE] = ISO14443A_ST_POWEROFF, [OPICC_REG_14443A_ATQA] = 0x0001, [OPICC_REG_RX_CLK_DIV] = 32, [OPICC_REG_RX_CLK_PHASE] = 0, [OPICC_REG_RX_CONTROL] = 0, [OPICC_REG_TX_CLK_DIV] = 16, [OPICC_REG_TX_CONTROL] = 0, [OPICC_REG_RX_COMP_LEVEL] = 0, }; u_int16_t opicc_reg_read(enum opicc_reg reg) { if (reg < _OPICC_NUM_REGS) return opicc_regs[reg]; return 0; } void opicc_reg_write(enum opicc_reg reg, u_int16_t val) { if (reg < _OPICC_NUM_REGS) opicc_regs[reg] = val; return; } #endif /******************************************************************** * OpenPICC USB Commandset (access to register set, ...) ********************************************************************/ static int opicc_reg_usb_in(struct req_ctx *rctx) { struct openpcd_hdr *poh = (struct openpcd_hdr *) &rctx->data[0]; u_int16_t *val16 = (u_int16_t *) poh->data; poh->val = 0; rctx->tot_len = sizeof(*poh); switch (poh->cmd) { case OPENPCD_CMD_PICC_REG_READ: *val16 = opicc_reg_read(poh->reg); rctx->tot_len += sizeof(u_int16_t); poh->flags |= OPENPCD_FLAG_RESPOND; break; case OPENPCD_CMD_PICC_REG_WRITE: if (rctx->tot_len < sizeof(*poh) + sizeof(u_int16_t)) { /* we only have an 8bit write */ opicc_reg_write(poh->reg, poh->val); } else opicc_reg_write(poh->reg, *val16); break; default: return USB_ERR(USB_ERR_CMD_UNKNOWN); } if (poh->flags & OPENPCD_FLAG_RESPOND) return USB_RET_RESPOND; return 0; } void opicc_usbapi_init(void) { usb_hdlr_register(&opicc_reg_usb_in, OPENPCD_CMD_CLS_PICC); }