From: michael Date: Sun, 29 Apr 2007 00:13:50 +0000 (+0000) Subject: first bits for amontec jtagkey X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/usb-driver/commitdiff_plain/8121bc50c29cae60e7ea5b5be5cbafffb8ba3563 first bits for amontec jtagkey --- diff --git a/jtagkey.c b/jtagkey.c new file mode 100644 index 0000000..0078e47 --- /dev/null +++ b/jtagkey.c @@ -0,0 +1,211 @@ +#include +#include +#include "usb-driver.h" +#include "jtagkey.h" + +static struct ftdi_context ftdic; + +int jtagkey_init(unsigned short vid, unsigned short pid) { + int ret = 0; + + if ((ret = ftdi_init(&ftdic)) != 0) { + fprintf(stderr, "unable to initialise libftdi: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); + return ret; + } + + if ((ret = ftdi_usb_open(&ftdic, vid, pid)) != 0) { + fprintf(stderr, "unable to open ftdi device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); + return ret; + } + + if ((ret = ftdi_usb_reset(&ftdic)) != 0) { + fprintf(stderr, "unable reset device: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); + return ret; + } + + if ((ret = ftdi_set_interface(&ftdic, INTERFACE_A)) != 0) { + fprintf(stderr, "unable to set interface: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); + return ret; + } + + if ((ret = ftdi_write_data_set_chunksize(&ftdic, 1)) != 0) { + fprintf(stderr, "unable to set write chunksize: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); + return ret; + } + + if ((ret = ftdi_set_latency_timer(&ftdic, 1)) != 0) { + fprintf(stderr, "unable to set latency timer: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); + return ret; + } + + if ((ret = ftdi_set_baudrate(&ftdic, 230400)) != 0) { + fprintf(stderr, "unable to set baudrate: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); + return ret; + } + + if ((ret = ftdi_set_bitmode(&ftdic, JTAGKEY_TCK|JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_OEn, 1)) != 0) { + fprintf(stderr, "unable to enable bitbang mode: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); + return ret; + } + + if ((ret = ftdi_usb_purge_buffers(&ftdic)) != 0) { + fprintf(stderr, "unable to purge buffers: %d (%s)\n", ret, ftdi_get_error_string(&ftdic)); + return ret; + } + + return ret; +} + +void jtagkey_close() { + ftdi_disable_bitbang(&ftdic); + ftdi_usb_close(&ftdic); + ftdi_deinit(&ftdic); +} + +void jtagkey_state(unsigned char data) { + fprintf(stderr,"Pins high: "); + + if (data & JTAGKEY_TCK) + fprintf(stderr,"TCK "); + + if (data & JTAGKEY_TDI) + fprintf(stderr,"TDI "); + + if (data & JTAGKEY_TDO) + fprintf(stderr,"TDO "); + + if (data & JTAGKEY_TMS) + fprintf(stderr,"TMS "); + + if (data & JTAGKEY_VREF) + fprintf(stderr,"VREF "); + + fprintf(stderr,"\n"); +} + +int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num) { + int ret = 0; + int i; + unsigned long port; + unsigned char val; + static unsigned char last_write = 0; + unsigned char data; + + for (i = 0; i < num; i++) { + DPRINTF("dwPort: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", + (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, + tr[i].fAutoinc, tr[i].dwOptions); + + port = (unsigned long)tr[i].dwPort; + val = tr[i].Data.Byte; + +#ifdef DEBUG + if (tr[i].cmdTrans == 13) + DPRINTF("write byte: %d\n", val); +#endif + + if (port == ppbase + PP_DATA) { + DPRINTF("data port\n"); + + data = 0x00; + switch(tr[i].cmdTrans) { + case PP_READ: + ret = 0; /* We don't support reading of the data port */ + break; + + case PP_WRITE: + if (val & PP_TDI) { + data |= JTAGKEY_TDI; + DPRINTF("TDI\n"); + } else { + DPRINTF("!TDI\n"); + } + if (val & PP_TCK) { + data |= JTAGKEY_TCK; + DPRINTF("TCK\n"); + } else { + DPRINTF("!TCK\n"); + } + if (val & PP_TMS) { + data |= JTAGKEY_TMS; + DPRINTF("TMS\n"); + } else { + DPRINTF("!TMS\n"); + } + if (val & PP_CTRL) { + data |= JTAGKEY_OEn; + DPRINTF("CTRL\n"); + } else { + DPRINTF("!CTRL\n"); + } + ftdi_write_data(&ftdic, &data, 1); + +#if 0 + do { + ftdi_read_pins(&ftdic, &tmp); + } while ((tmp & (JTAGKEY_TDI|JTAGKEY_TMS|JTAGKEY_TCK|JTAGKEY_TDI)) != data); +#endif + + last_write = val; + break; + + default: + fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans); + ret = -1; + break; + } + } else if (port == ppbase + PP_STATUS) { + DPRINTF("status port (last write: %d)\n", last_write); + switch(tr[i].cmdTrans) { + case PP_READ: + ftdi_read_pins(&ftdic, &data); +#ifdef DEBUG + DPRINTF("READ: 0x%x\n", data); + jtagkey_state(data); +#endif + + val = 0x00; + if (data & JTAGKEY_TDO) + val |= PP_TDO; + + if (last_write & 0x40) + val |= 0x20; + else + val |= 0x80; + break; + + case PP_WRITE: + ret = 0; /* Status Port is readonly */ + break; + + default: + fprintf(stderr,"!!!Unsupported TRANSFER command: %lu!!!\n", tr[i].cmdTrans); + ret = -1; + break; + } + } else if (port == ppbase + PP_CONTROL) { + DPRINTF("control port\n"); + } else if ((port == ecpbase + PP_ECP_CFGA) && ecpbase) { + DPRINTF("ECP_CFGA port\n"); + } else if ((port == ecpbase + PP_ECP_CFGB) && ecpbase) { + DPRINTF("ECP_CFGB port\n"); + } else if ((port == ecpbase + PP_ECP_ECR) && ecpbase) { + DPRINTF("ECP_ECR port\n"); + } else { + DPRINTF("access to unsupported address range!\n"); + ret = 0; + } + + tr[i].Data.Byte = val; + + DPRINTF("dwPortReturn: 0x%lx, cmdTrans: %lu, dwbytes: %ld, fautoinc: %ld, dwoptions: %ld\n", + (unsigned long)tr[i].dwPort, tr[i].cmdTrans, tr[i].dwBytes, + tr[i].fAutoinc, tr[i].dwOptions); +#ifdef DEBUG + if (tr[i].cmdTrans == 10) + DPRINTF("read byte: %d\n", tr[i].Data.Byte); +#endif + } + + return ret; +} diff --git a/jtagkey.h b/jtagkey.h new file mode 100644 index 0000000..59a32e2 --- /dev/null +++ b/jtagkey.h @@ -0,0 +1,10 @@ +#define JTAGKEY_TCK 0x01 +#define JTAGKEY_TDI 0x02 +#define JTAGKEY_TDO 0x04 +#define JTAGKEY_TMS 0x08 +#define JTAGKEY_VREF 0x20 +#define JTAGKEY_OEn 0x10 + +int jtagkey_init(unsigned short vid, unsigned short pid); +void jtagkey_close(); +int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num);