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/* Main state machine and register implementation for OpenPICC
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* (C) 2006 by Harald Welte <hwelte@hmw-consulting.de> */
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#include <sys/types.h>
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#include <openpcd.h>
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#include <openpicc_regs.h>
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#include <openpicc.h>
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#include <os/req_ctx.h>
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#include <os/usb_handler.h>
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#include "opicc_reg.h"
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/********************************************************************
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* OpenPICC Register set
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********************************************************************/
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#ifdef DEBUG
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/* Our registers, including their power-up default values */
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static uint16_t opicc_regs[_OPICC_NUM_REGS] = {
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[OPICC_REG_14443A_UIDLEN] = 4,
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[OPICC_REG_14443A_FDT0] = 1236,
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[OPICC_REG_14443A_FDT1] = 1172,
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[OPICC_REG_14443A_STATE] = ISO14443A_ST_POWEROFF,
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[OPICC_REG_14443A_ATQA] = 0x0001,
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[OPICC_REG_RX_CLK_DIV] = 32,
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[OPICC_REG_RX_CLK_PHASE] = 0,
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[OPICC_REG_RX_CONTROL] = 0,
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[OPICC_REG_TX_CLK_DIV] = 16,
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[OPICC_REG_TX_CONTROL] = 0,
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[OPICC_REG_RX_COMP_LEVEL] = 0,
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};
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uint16_t opicc_reg_read(enum opicc_reg reg)
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{
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if (reg < _OPICC_NUM_REGS)
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return opicc_regs[reg];
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return 0;
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}
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void opicc_reg_write(enum opicc_reg reg, uint16_t val)
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{
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if (reg < _OPICC_NUM_REGS)
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opicc_regs[reg] = val;
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return;
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}
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#endif
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/********************************************************************
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* OpenPICC USB Commandset (access to register set, ...)
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********************************************************************/
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static int opicc_reg_usb_in(struct req_ctx *rctx)
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{
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struct openpcd_hdr *poh = (struct openpcd_hdr *) &rctx->data[0];
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uint16_t *val16 = (uint16_t *) poh->data;
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poh->val = 0;
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rctx->tot_len = sizeof(*poh);
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switch (poh->cmd) {
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case OPENPCD_CMD_PICC_REG_READ:
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*val16 = opicc_reg_read(poh->reg);
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rctx->tot_len += sizeof(uint16_t);
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poh->flags |= OPENPCD_FLAG_RESPOND;
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break;
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case OPENPCD_CMD_PICC_REG_WRITE:
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if (rctx->tot_len < sizeof(*poh) + sizeof(uint16_t)) {
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/* we only have an 8bit write */
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opicc_reg_write(poh->reg, poh->val);
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} else
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opicc_reg_write(poh->reg, *val16);
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break;
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default:
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return USB_ERR(USB_ERR_CMD_UNKNOWN);
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}
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if (poh->flags & OPENPCD_FLAG_RESPOND)
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return USB_RET_RESPOND;
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return 0;
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}
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void opicc_usbapi_init(void)
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{
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usb_hdlr_register(&opicc_reg_usb_in, OPENPCD_CMD_CLS_PICC);
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}
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