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Diffstat (limited to 'firmware/src/picc/openpicc.c')
-rw-r--r--firmware/src/picc/openpicc.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/firmware/src/picc/openpicc.c b/firmware/src/picc/openpicc.c
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index 0000000..7b2b5f2
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+++ b/firmware/src/picc/openpicc.c
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+/* 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
+ ********************************************************************/
+
+/* 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_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;
+}
+
+/********************************************************************
+ * 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)) {
+ poh->flags = OPENPCD_FLAG_ERROR;
+ }
+ 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);
+}
personal git repositories of Harald Welte. Your mileage may vary