*/
#include <config.h>
+#include <glib.h>
+#include <string.h>
#include "protocol.h"
+#define BUF_COUNT (8)
+#define BUF_SIZE (16*1024)
+#define BUF_TIMEOUT (1000*1000)
+
SR_PRIV struct sr_dev_driver saleae_logicpro_driver_info;
+static const uint32_t drvopts[] = {
+ SR_CONF_LOGIC_ANALYZER,
+};
+
+static const uint32_t scanopts[] = {
+ SR_CONF_CONN,
+};
+
+static const uint32_t devopts[] = {
+ SR_CONF_CONTINUOUS,
+ SR_CONF_CONN | SR_CONF_GET,
+ SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
+};
+
+static const char *channel_names[] = {
+ "0", "1", "2", "3", "4", "5", "6", "7",
+ "8", "9", "10", "11", "12", "13", "14", "15",
+};
+
+static const uint64_t samplerates[] = {
+ SR_MHZ(1),
+ SR_MHZ(2),
+ SR_KHZ(2500),
+ SR_MHZ(10),
+ SR_MHZ(25),
+ SR_MHZ(50),
+};
+
+static gboolean scan_firmware(libusb_device *dev)
+{
+ struct libusb_device_descriptor des;
+ struct libusb_device_handle *hdl;
+ gboolean ret;
+ unsigned char strdesc[64];
+
+ hdl = NULL;
+ ret = FALSE;
+
+ libusb_get_device_descriptor(dev, &des);
+
+ if (libusb_open(dev, &hdl) != 0)
+ goto out;
+
+ if (libusb_get_string_descriptor_ascii(hdl,
+ des.iManufacturer, strdesc, sizeof(strdesc)) < 0)
+ goto out;
+ if (strcmp((const char *)strdesc, "Saleae"))
+ goto out;
+
+ if (libusb_get_string_descriptor_ascii(hdl,
+ des.iProduct, strdesc, sizeof(strdesc)) < 0)
+ goto out;
+ if (strcmp((const char *)strdesc, "Logic Pro"))
+ goto out;
+
+ ret = TRUE;
+
+out:
+ if (hdl)
+ libusb_close(hdl);
+
+ return ret;
+}
+
static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
struct drv_context *drvc;
- GSList *devices;
-
- (void)options;
+ struct dev_context *devc;
+ struct sr_dev_inst *sdi;
+ GSList *devices, *conn_devices;
+ libusb_device **devlist;
+ struct libusb_device_descriptor des;
+ const char *conn;
+ char connection_id[64];
devices = NULL;
drvc = di->context;
drvc->instances = NULL;
- /* TODO: scan for devices, either based on a SR_CONF_CONN option
- * or on a USB scan. */
+ conn = NULL;
+ for (GSList *l = options; l; l = l->next) {
+ struct sr_config *src = l->data;
+
+ switch (src->key) {
+ case SR_CONF_CONN:
+ conn = g_variant_get_string(src->data, NULL);
+ break;
+ }
+ }
+
+ if (conn)
+ conn_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, conn);
+ else
+ conn_devices = NULL;
+
+ libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist);
+ for (unsigned int i = 0; devlist[i]; i++) {
+ if (conn) {
+ struct sr_usb_dev_inst *usb = NULL;
+ GSList *l;
+
+ for (l = conn_devices; l; l = l->next) {
+ usb = l->data;
+ if (usb->bus == libusb_get_bus_number(devlist[i])
+ && usb->address == libusb_get_device_address(devlist[i]))
+ break;
+ }
+ if (!l)
+ /* This device matched none of the ones that
+ * matched the conn specification. */
+ continue;
+ }
+
+ libusb_get_device_descriptor(devlist[i], &des);
+
+ usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
+
+ if (des.idVendor != 0x21a9 || des.idProduct != 0x1006)
+ continue;
+
+ if (!scan_firmware(devlist[i])) {
+ sr_err("Found a Logic Pro device, but firmware is not loaded (use Saleae application).");
+ continue;
+ }
+
+ sdi = g_malloc0(sizeof(struct sr_dev_inst));
+ sdi->status = SR_ST_INITIALIZING;
+ sdi->vendor = g_strdup("Saleae");
+ sdi->model = g_strdup("Logic Pro 16");
+ sdi->connection_id = g_strdup(connection_id);
+
+ for (unsigned int j = 0; j < ARRAY_SIZE(channel_names); j++)
+ sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE,
+ channel_names[j]);
+
+ sr_dbg("Found a Logic Pro 16 device.");
+ sdi->status = SR_ST_INACTIVE;
+ sdi->inst_type = SR_INST_USB;
+ sdi->conn = sr_usb_dev_inst_new(libusb_get_bus_number(devlist[i]),
+ libusb_get_device_address(devlist[i]), NULL);
+
+ devc = g_malloc0(sizeof(struct dev_context));
+ sdi->priv = devc;
+ devices = g_slist_append(devices, sdi);
+
+ }
+ libusb_free_device_list(devlist, 1);
+ g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
- return devices;
+ return std_scan_complete(di, devices);
}
static int dev_clear(const struct sr_dev_driver *di)
static int dev_open(struct sr_dev_inst *sdi)
{
- (void)sdi;
+ struct sr_dev_driver *di = sdi->driver;
+ struct drv_context *drvc = di->context;
+ struct dev_context *devc = sdi->priv;
+ struct sr_usb_dev_inst *usb = sdi->conn;
+ int ret;
- /* TODO: get handle from sdi->conn and open it. */
+ if (sr_usb_open(drvc->sr_ctx->libusb_ctx, usb) != SR_OK)
+ return SR_ERR;
+
+ if ((ret = libusb_claim_interface(usb->devhdl, 0))) {
+ sr_err("Failed to claim interface: %s.", libusb_error_name(ret));
+ return SR_ERR;
+ }
+
+ /* configure default samplerate */
+ if (devc->dig_samplerate == 0)
+ devc->dig_samplerate = samplerates[3];
sdi->status = SR_ST_ACTIVE;
static int dev_close(struct sr_dev_inst *sdi)
{
- (void)sdi;
+ struct sr_usb_dev_inst *usb = sdi->conn;
- /* TODO: get handle from sdi->conn and close it. */
+ sr_usb_close(usb);
sdi->status = SR_ST_INACTIVE;
}
static int config_get(uint32_t key, GVariant **data,
- const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
+ const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
+ struct sr_usb_dev_inst *usb;
+ struct dev_context *devc;
int ret;
- (void)sdi;
- (void)data;
(void)cg;
ret = SR_OK;
switch (key) {
- /* TODO */
+ case SR_CONF_CONN:
+ if (!sdi || !sdi->conn)
+ return SR_ERR_ARG;
+ usb = sdi->conn;
+ *data = g_variant_new_printf("%d.%d", usb->bus, usb->address);
+ break;
+ case SR_CONF_SAMPLERATE:
+ if (!sdi)
+ return SR_ERR;
+ devc = sdi->priv;
+ *data = g_variant_new_uint64(devc->dig_samplerate);
+ break;
default:
return SR_ERR_NA;
}
}
static int config_set(uint32_t key, GVariant *data,
- const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
+ const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
+ struct dev_context *devc;
int ret;
- (void)data;
(void)cg;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
+ devc = sdi->priv;
ret = SR_OK;
switch (key) {
- /* TODO */
+ case SR_CONF_SAMPLERATE:
+ devc->dig_samplerate = g_variant_get_uint64(data);
+ break;
default:
ret = SR_ERR_NA;
}
}
static int config_list(uint32_t key, GVariant **data,
- const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
+ const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
+ GVariant *gvar;
+ GVariantBuilder gvb;
int ret;
(void)sdi;
- (void)data;
(void)cg;
ret = SR_OK;
switch (key) {
- /* TODO */
+ case SR_CONF_SCAN_OPTIONS:
+ *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
+ scanopts,
+ ARRAY_SIZE(scanopts),
+ sizeof(uint32_t));
+ break;
+ case SR_CONF_DEVICE_OPTIONS:
+ if (!sdi) {
+ *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
+ drvopts,
+ ARRAY_SIZE(drvopts),
+ sizeof(uint32_t));
+ } else {
+ *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
+ devopts,
+ ARRAY_SIZE(devopts),
+ sizeof(uint32_t));
+ }
+ break;
+ case SR_CONF_SAMPLERATE:
+ g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
+ gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"),
+ samplerates, ARRAY_SIZE(samplerates), sizeof(uint64_t));
+ g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
+ *data = g_variant_builder_end(&gvb);
+ break;
default:
return SR_ERR_NA;
}
return ret;
}
+static void dev_acquisition_abort(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc = sdi->priv;
+ unsigned int i;
+
+ for (i = 0; i < devc->num_transfers; i++) {
+ if (devc->transfers[i])
+ libusb_cancel_transfer(devc->transfers[i]);
+ }
+}
+
+static int dev_acquisition_handle(int fd, int revents, void *cb_data)
+{
+ struct sr_dev_inst *sdi = cb_data;
+ struct drv_context *drvc = sdi->driver->context;
+ struct timeval tv = {};
+
+ (void)fd;
+ (void)revents;
+
+ libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
+
+ return TRUE;
+}
+
static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
+ struct dev_context *devc = sdi->priv;
+ struct drv_context *drvc = sdi->driver->context;
+ struct libusb_transfer *transfer;
+ struct sr_usb_dev_inst *usb;
+ uint8_t *buf;
+ unsigned int i, ret;
+
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
- /* TODO: configure hardware, reset acquisition state, set up
- * callbacks and send header packet. */
+ ret = saleae_logicpro_init(sdi);
+ if (ret != SR_OK)
+ return ret;
+
+ ret = saleae_logicpro_prepare(sdi);
+ if (ret != SR_OK)
+ return ret;
+
+ usb = sdi->conn;
+
+ devc->conv_buffer = g_malloc(CONV_BUFFER_SIZE);
+
+ devc->num_transfers = BUF_COUNT;
+ devc->transfers = g_malloc0(sizeof(*devc->transfers) * BUF_COUNT);
+ for (i = 0; i < devc->num_transfers; i++) {
+ buf = g_malloc(BUF_SIZE);
+ transfer = libusb_alloc_transfer(0);
+ libusb_fill_bulk_transfer(transfer, usb->devhdl,
+ 2 | LIBUSB_ENDPOINT_IN, buf, BUF_SIZE,
+ saleae_logicpro_receive_data, (void *)sdi, BUF_TIMEOUT);
+ if ((ret = libusb_submit_transfer(transfer)) != 0) {
+ sr_err("Failed to submit transfer: %s.",
+ libusb_error_name(ret));
+ libusb_free_transfer(transfer);
+ g_free(buf);
+ dev_acquisition_abort(sdi);
+ return SR_ERR;
+ }
+ devc->transfers[i] = transfer;
+ devc->submitted_transfers++;
+ }
+
+ usb_source_add(sdi->session, drvc->sr_ctx, BUF_TIMEOUT, dev_acquisition_handle, (void *)sdi);
+
+ std_session_send_df_header(sdi);
+
+ saleae_logicpro_start(sdi);
+ if (ret != SR_OK)
+ return ret;
return SR_OK;
}
static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
+ struct dev_context *devc = sdi->priv;
+ struct drv_context *drvc = sdi->driver->context;
+
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
- /* TODO: stop acquisition. */
+ saleae_logicpro_stop(sdi);
+
+ std_session_send_df_end(sdi);
+
+ usb_source_remove(sdi->session, drvc->sr_ctx);
+
+ g_free(devc->conv_buffer);
return SR_OK;
}
*/
#include <config.h>
+#include <string.h>
#include "protocol.h"
-SR_PRIV int saleae_logicpro_receive_data(int fd, int revents, void *cb_data)
+#define COMMAND_START_CAPTURE 0x01
+#define COMMAND_STOP_CAPTURE 0x02
+#define COMMAND_READ_EEPROM 0x07
+#define COMMAND_WRITE_REG 0x80
+#define COMMAND_READ_REG 0x81
+#define COMMAND_WRITE_I2C 0x87
+#define COMMAND_READ_I2C 0x88
+#define COMMAND_WAKE_I2C 0x89
+#define COMMAND_READ_FW_VER 0x8b
+
+#define REG_LED_RED 0x0f
+#define REG_LED_GREEN 0x10
+#define REG_LED_BLUE 0x11
+
+static void iterate_lfsr(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc = sdi->priv;
+ uint32_t lfsr = devc->lfsr;
+ int i, max;
+
+ max = (lfsr & 0x1f) + 34;
+ for (i = 0; i <= max; i++) {
+ lfsr = (lfsr >> 1) | \
+ ((lfsr ^ \
+ (lfsr >> 1) ^ \
+ (lfsr >> 21) ^ \
+ (lfsr >> 31) \
+ ) << 31);
+ }
+ sr_dbg("Iterate 0x%08x -> 0x%08x", devc->lfsr, lfsr);
+ devc->lfsr = lfsr;
+}
+
+static void encrypt(const struct sr_dev_inst *sdi, const uint8_t *in, uint8_t *out, uint8_t len)
+{
+ struct dev_context *devc = sdi->priv;
+ uint32_t lfsr = devc->lfsr;
+ uint8_t value, mask;
+ int i;
+
+ for (i = 0; i < len; i++) {
+ value = in[i];
+ mask = lfsr >> (i%4*8);
+ if (i == 0)
+ value = (value & 0x28) | ((value ^ mask) & ~0x28);
+ else
+ value = value ^ mask;
+ out[i] = value;
+ }
+ iterate_lfsr(sdi);
+}
+
+static void decrypt(const struct sr_dev_inst *sdi, uint8_t *data, uint8_t len)
+{
+ struct dev_context *devc = sdi->priv;
+ uint32_t lfsr = devc->lfsr;
+ int i;
+
+ for (i = 0; i < len; i++) {
+ data[i] ^= (lfsr >> (i%4*8));
+ }
+ iterate_lfsr(sdi);
+}
+
+static int transact(const struct sr_dev_inst *sdi,
+ const uint8_t *req, uint8_t req_len,
+ uint8_t *rsp, uint8_t rsp_len)
+{
+ struct sr_usb_dev_inst *usb = sdi->conn;
+ uint8_t *req_enc;
+ uint8_t rsp_dummy[1] = {};
+ int ret, xfer;
+
+ if (req_len < 2 || req_len > 64 || rsp_len > 128 ||
+ !req || (rsp_len > 0 && !rsp))
+ return SR_ERR_ARG;
+
+ req_enc = g_malloc(req_len);
+ encrypt(sdi, req, req_enc, req_len);
+
+ ret = libusb_bulk_transfer(usb->devhdl, 1, req_enc, req_len, &xfer, 1000);
+ if (ret != 0) {
+ sr_dbg("Failed to send request 0x%02x: %s.",
+ req[1], libusb_error_name(ret));
+ return SR_ERR;
+ }
+ if (xfer != req_len) {
+ sr_dbg("Failed to send request 0x%02x: incorrect length "
+ "%d != %d.", req[1], xfer, req_len);
+ return SR_ERR;
+ }
+
+ if (req[0] == 0x20) { // reseed
+ return SR_OK;
+ } else if (rsp_len == 0) {
+ rsp = rsp_dummy;
+ rsp_len = sizeof(rsp_dummy);
+ }
+
+ ret = libusb_bulk_transfer(usb->devhdl, 0x80 | 1, rsp, rsp_len,
+ &xfer, 1000);
+ if (ret != 0) {
+ sr_dbg("Failed to receive response to request 0x%02x: %s.",
+ req[1], libusb_error_name(ret));
+ return SR_ERR;
+ }
+ if (xfer != rsp_len) {
+ sr_dbg("Failed to receive response to request 0x%02x: "
+ "incorrect length %d != %d.", req[1], xfer, rsp_len);
+ return SR_ERR;
+ }
+
+ decrypt(sdi, rsp, rsp_len);
+
+ return SR_OK;
+}
+
+static int reseed(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc = sdi->priv;
+ uint8_t req[] = {0x20, 0x24, 0x4b, 0x35, 0x8e};
+
+ devc->lfsr = 0;
+ return transact(sdi, req, sizeof(req), NULL, 0);
+}
+
+static int write_regs(const struct sr_dev_inst *sdi, uint8_t (*regs)[2], uint8_t cnt)
+{
+ uint8_t req[64];
+ int i;
+
+ if (cnt < 1 || cnt > 30)
+ return SR_ERR_ARG;
+
+ req[0] = 0x00;
+ req[1] = COMMAND_WRITE_REG;
+ req[2] = cnt;
+
+ for (i = 0; i < cnt; i++) {
+ req[3 + 2 * i] = regs[i][0];
+ req[4 + 2 * i] = regs[i][1];
+ }
+
+ return transact(sdi, req, 3 + 2*cnt, NULL, 0);
+}
+
+static int write_reg(const struct sr_dev_inst *sdi,
+ uint8_t address, uint8_t value)
+{
+ uint8_t regs[2] = {address, value};
+
+ return write_regs(sdi, ®s, 1);
+}
+
+static int get_firmware_version(const struct sr_dev_inst *sdi)
{
- const struct sr_dev_inst *sdi;
- struct dev_context *devc;
+ uint8_t req[2] = {0x00, COMMAND_READ_FW_VER};
+ uint8_t rsp[128] = {};
+ int ret;
+
+ ret = transact(sdi, req, sizeof(req), rsp, sizeof(rsp));
+ if (ret == SR_OK) {
+ rsp[63] = 0;
+ sr_dbg("fw-version: %s", rsp);
+ }
+
+ return ret;
+}
- (void)fd;
+static int read_i2c(const struct sr_dev_inst *sdi, uint8_t *data, uint8_t len)
+{
+ uint8_t req[5];
+ uint8_t rsp[1+128];
+ int ret;
- if (!(sdi = cb_data))
- return TRUE;
+ if (len < 1 || len > 128 || !data)
+ return SR_ERR_ARG;
- if (!(devc = sdi->priv))
- return TRUE;
+ req[0] = 0x00;
+ req[1] = COMMAND_READ_I2C;
+ req[2] = 0xc0; // fixed address
+ req[3] = len;
+ req[4] = 0; // len msb?
- if (revents == G_IO_IN) {
- /* TODO */
+ ret = transact(sdi, req, sizeof(req), rsp, 1 + len);
+ if (ret != SR_OK) {
+ return ret;
+ }
+ if (rsp[0] != 0x02) {
+ sr_dbg("Failed to do I2C read (0x%02x).", rsp[0]);
+ return SR_ERR;
}
- return TRUE;
+ memcpy(data, rsp+1, len);
+ return SR_OK;
+}
+
+static int write_i2c(const struct sr_dev_inst *sdi, const uint8_t *data, uint8_t len)
+{
+ uint8_t req[5 + 128];
+ uint8_t rsp[1];
+ int ret;
+
+ if (len < 1 || len > 128 || !data)
+ return SR_ERR_ARG;
+
+ req[0] = 0x00;
+ req[1] = COMMAND_WRITE_I2C;
+ req[2] = 0xc0; // fixed address
+ req[3] = len;
+ req[4] = 0; // len msb?
+ memcpy(req + 5, data, len);
+
+ ret = transact(sdi, req, 5 + len, rsp, sizeof(rsp));
+ if (ret != SR_OK) {
+ return ret;
+ }
+ if (rsp[0] != 0x02) {
+ sr_dbg("Failed to do I2C write (0x%02x).", rsp[0]);
+ return SR_ERR;
+ }
+
+ return SR_OK;
+}
+
+static int wake_i2c(const struct sr_dev_inst *sdi)
+{
+ uint8_t req[] = {0x00, COMMAND_WAKE_I2C};
+ uint8_t rsp[1] = {};
+ uint8_t i2c_rsp[1+1+2] = {};
+ int ret;
+
+ ret = transact(sdi, req, sizeof(req), rsp, sizeof(rsp));
+ if (ret != SR_OK) {
+ return ret;
+ }
+ if (rsp[0] != 0x00) {
+ sr_dbg("Failed to do I2C wake trigger (0x%02x).", rsp[0]);
+ return SR_ERR;
+ }
+
+ ret = read_i2c(sdi, i2c_rsp, sizeof(i2c_rsp));
+ if (ret != SR_OK) {
+ return ret;
+ }
+ if (i2c_rsp[1] != 0x11) {
+ sr_dbg("Failed to do I2C wake read (0x%02x).", i2c_rsp[0]);
+ return SR_ERR;
+ }
+
+ return SR_OK;
+}
+
+static int crypto_random(const struct sr_dev_inst *sdi, uint8_t *data)
+{
+ uint8_t i2c_req[8] = {0x03, 0x07, 0x1b, 0x00, 0x00, 0x00, 0x24, 0xcd};
+ uint8_t i2c_rsp[1+32+2] = {};
+ int ret;
+
+ ret = write_i2c(sdi, i2c_req, sizeof(i2c_req));
+ if (ret != SR_OK) {
+ return ret;
+ }
+
+ g_usleep(100000); // TODO: poll instead
+
+ ret = read_i2c(sdi, i2c_rsp, sizeof(i2c_rsp));
+ if (ret != SR_OK) {
+ return ret;
+ }
+
+ if (data) {
+ memcpy(data, i2c_rsp+1, 32);
+ }
+
+ return SR_OK;
+}
+
+static int crypto_nonce(const struct sr_dev_inst *sdi, uint8_t *data)
+{
+ uint8_t i2c_req[6+20+2] = {0x03, 0x1b, 0x16, 0x00, 0x00, 0x00};
+ uint8_t i2c_rsp[1+32+2] = {};
+ int ret;
+
+ // CRC
+ i2c_req[26] = 0x7d;
+ i2c_req[27] = 0xe0;
+
+ ret = write_i2c(sdi, i2c_req, sizeof(i2c_req));
+ if (ret != SR_OK) {
+ return ret;
+ }
+
+ g_usleep(100000); // TODO: poll instead
+
+ ret = read_i2c(sdi, i2c_rsp, sizeof(i2c_rsp));
+ if (ret != SR_OK) {
+ return ret;
+ }
+
+ if (data) {
+ memcpy(data, i2c_rsp+1, 32);
+ }
+
+ return SR_OK;
+}
+
+static int crypto_sign(const struct sr_dev_inst *sdi, uint8_t *data, uint8_t *crc)
+{
+ uint8_t i2c_req[8] = {0x03, 0x07, 0x41, 0x80, 0x00, 0x00, 0x28, 0x05};
+ uint8_t i2c_rsp[1+64+2] = {};
+ int ret;
+
+ ret = write_i2c(sdi, i2c_req, sizeof(i2c_req));
+ if (ret != SR_OK) {
+ return ret;
+ }
+
+ g_usleep(100000); // TODO: poll instead
+
+ ret = read_i2c(sdi, i2c_rsp, sizeof(i2c_rsp));
+ if (ret != SR_OK) {
+ return ret;
+ }
+
+ memcpy(data, i2c_rsp+1, 64);
+ memcpy(crc, i2c_rsp+1+64, 2);
+
+ return SR_OK;
+}
+
+static int authenticate(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc = sdi->priv;
+ uint8_t random[32] = {};
+ uint8_t nonce[32] = {};
+ uint8_t sig[64] = {};
+ uint8_t sig_crc[64] = {};
+ uint32_t lfsr;
+ int i, ret;
+
+ ret = wake_i2c(sdi);
+ if (ret != SR_OK)
+ return ret;
+
+ ret = crypto_random(sdi, random);
+ if (ret != SR_OK)
+ return ret;
+ sr_dbg("random: 0x%02x 0x%02x 0x%02x 0x%02x", random[0], random[1], random[2], random[3]);
+
+ ret = crypto_nonce(sdi, nonce);
+ if (ret != SR_OK)
+ return ret;
+ sr_dbg("nonce: 0x%02x 0x%02x 0x%02x 0x%02x", nonce[0], nonce[1], nonce[2], nonce[3]);
+
+ ret = crypto_nonce(sdi, nonce);
+ if (ret != SR_OK)
+ return ret;
+ sr_dbg("nonce: 0x%02x 0x%02x 0x%02x 0x%02x", nonce[0], nonce[1], nonce[2], nonce[3]);
+
+ ret = crypto_sign(sdi, sig, sig_crc);
+ if (ret != SR_OK)
+ return ret;
+ sr_dbg("sig: 0x%02x 0x%02x 0x%02x 0x%02x", sig[0], sig[1], sig[2], sig[3]);
+ sr_dbg("sig crc: 0x%02x 0x%02x", sig_crc[0], sig_crc[1]);
+
+ lfsr = 0;
+ for (i = 0; i < 28; i++)
+ lfsr ^= nonce[i] << (8*(i%4));
+ lfsr ^= sig_crc[0] | sig_crc[1] << 8;
+
+ sr_dbg("Authenticate 0x%08x -> 0x%08x", devc->lfsr, lfsr);
+ devc->lfsr = lfsr;
+
+ return SR_OK;
+}
+
+static int set_led(const struct sr_dev_inst *sdi, uint8_t r, uint8_t g, uint8_t b)
+{
+ uint8_t regs[][2] = {
+ {REG_LED_RED, r},
+ {REG_LED_GREEN, g},
+ {REG_LED_BLUE, b},
+ };
+
+ authenticate(sdi);
+
+ return write_regs(sdi, regs, G_N_ELEMENTS(regs));
+}
+
+static int configure_channels(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc = sdi->priv;
+ const struct sr_channel *c;
+ const GSList *l;
+ uint16_t mask;
+
+ devc->dig_channel_cnt = 0;
+ devc->dig_channel_mask = 0;
+ for (l = sdi->channels; l; l = l->next) {
+ c = l->data;
+ if (!c->enabled)
+ continue;
+
+ mask = 1 << c->index;
+ devc->dig_channel_masks[devc->dig_channel_cnt++] = mask;
+ devc->dig_channel_mask |= mask;
+
+ }
+ sr_dbg("%d channels enabled (0x%04x)",
+ devc->dig_channel_cnt,
+ devc->dig_channel_mask);
+
+ return SR_OK;
+}
+
+SR_PRIV int saleae_logicpro_init(const struct sr_dev_inst *sdi)
+{
+ reseed(sdi);
+ get_firmware_version(sdi);
+ /* setting the LED doesn't work yet */
+ /* set_led(sdi, 0x00, 0x00, 0xff); */
+
+ return SR_OK;
+}
+
+SR_PRIV int saleae_logicpro_prepare(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc = sdi->priv;
+ uint8_t regs_unknown[][2] = {
+ {0x03, 0x0f},
+ {0x04, 0x00},
+ {0x05, 0x00},
+ };
+ uint8_t regs_config[][2] = {
+ {0x00, 0x00},
+ {0x08, 0x00}, /* analog channel mask (LSB) */
+ {0x09, 0x00}, /* analog channel mask (MSB) */
+ {0x06, 0x01}, /* digital channel mask (LSB) */
+ {0x07, 0x00}, /* digital channel mask (MSB) */
+ {0x0a, 0x00}, /* analog sample rate? */
+ {0x0b, 0x64}, /* digital sample rate? */
+ {0x0c, 0x00},
+ {0x0d, 0x00}, /* analog mux rate? */
+ {0x0e, 0x01}, /* digital mux rate? */
+ {0x12, 0x04},
+ {0x13, 0x00},
+ {0x14, 0xff}, /* pre-divider? */
+ };
+ uint8_t start_req[] = {0x00, 0x01};
+ uint8_t start_rsp[2] = {};
+
+ configure_channels(sdi);
+
+ /* digital channel mask and muxing */
+ regs_config[3][1] = devc->dig_channel_mask;
+ regs_config[4][1] = devc->dig_channel_mask >> 8;
+ regs_config[9][1] = devc->dig_channel_cnt;
+
+ /* samplerate */
+ switch (devc->dig_samplerate) {
+ case SR_MHZ(1):
+ regs_config[6][1] = 0x64;
+ break;
+ case SR_MHZ(2):
+ regs_config[6][1] = 0x32;
+ break;
+ case SR_KHZ(2500):
+ regs_config[6][1] = 0x28;
+ break;
+ case SR_MHZ(10):
+ regs_config[6][1] = 0x0a;
+ break;
+ case SR_MHZ(25):
+ regs_config[6][1] = 0x04;
+ regs_config[12][1] = 0x80;
+ break;
+ case SR_MHZ(50):
+ regs_config[6][1] = 0x02;
+ regs_config[12][1] = 0x40;
+ break;
+ default:
+ return SR_ERR_ARG;
+ }
+
+ authenticate(sdi);
+
+ write_reg(sdi, 0x15, 0x03);
+ write_regs(sdi, regs_unknown, G_N_ELEMENTS(regs_unknown));
+ write_regs(sdi, regs_config, G_N_ELEMENTS(regs_config));
+
+ transact(sdi, start_req, sizeof(start_req), start_rsp, sizeof(start_rsp));
+
+ return SR_OK;
+}
+
+SR_PRIV int saleae_logicpro_start(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc = sdi->priv;
+
+ devc->conv_size = 0;
+ devc->batch_index = 0;
+
+ write_reg(sdi, 0x00, 0x01);
+
+ return SR_OK;
+}
+
+SR_PRIV int saleae_logicpro_stop(const struct sr_dev_inst *sdi)
+{
+ uint8_t stop_req[] = {0x00, 0x02};
+ uint8_t stop_rsp[2] = {};
+
+ write_reg(sdi, 0x00, 0x00);
+ transact(sdi, stop_req, sizeof(stop_req), stop_rsp, sizeof(stop_rsp));
+
+ return SR_OK;
+}
+
+static void saleae_logicpro_send_data(const struct sr_dev_inst *sdi,
+ void *data, size_t length, size_t unitsize)
+{
+ const struct sr_datafeed_logic logic = {
+ .length = length,
+ .unitsize = unitsize,
+ .data = data
+ };
+
+ const struct sr_datafeed_packet packet = {
+ .type = SR_DF_LOGIC,
+ .payload = &logic
+ };
+
+ sr_session_send(sdi, &packet);
+}
+
+/*
+ * One batch from the device consists of 32 samples per active digital channel.
+ * This stream of batches is packed into USB packets with 16384 bytes each.
+ */
+static void saleae_logicpro_convert_data(const struct sr_dev_inst *sdi,
+ const uint32_t *src, size_t srccnt)
+{
+ struct dev_context *devc = sdi->priv;
+ uint8_t *dst = devc->conv_buffer;
+ uint32_t samples;
+ uint16_t channel_mask;
+ unsigned int sample_index, batch_index;
+ uint16_t *dst_batch;
+
+ /* copy partial batch to the beginning */
+ memcpy(dst, dst+devc->conv_size, CONV_BATCH_SIZE);
+ /* reset converted size */
+ devc->conv_size = 0;
+
+ batch_index = devc->batch_index;
+ while (srccnt--) {
+ samples = *src++;
+ dst_batch = (uint16_t*)dst;
+
+ /* first index of the batch */
+ if (batch_index == 0)
+ memset(dst, 0, CONV_BATCH_SIZE);
+
+ /* convert one channel */
+ channel_mask = devc->dig_channel_masks[batch_index];
+ for (sample_index = 0; sample_index <= 31; sample_index++)
+ if ((samples >> (31-sample_index)) & 1)
+ dst_batch[sample_index] |= channel_mask;
+
+ /* last index of the batch */
+ if (++batch_index == devc->dig_channel_cnt) {
+ devc->conv_size += CONV_BATCH_SIZE;
+ batch_index = 0;
+ dst += CONV_BATCH_SIZE;
+ }
+ }
+ devc->batch_index = batch_index;
+}
+
+SR_PRIV void LIBUSB_CALL saleae_logicpro_receive_data(struct libusb_transfer *transfer)
+{
+ const struct sr_dev_inst *sdi = transfer->user_data;
+ struct dev_context *devc = sdi->priv;
+ int ret;
+
+ switch (transfer->status) {
+ case LIBUSB_TRANSFER_NO_DEVICE:
+ sr_dbg("FIXME no device");
+ return;
+ case LIBUSB_TRANSFER_COMPLETED:
+ case LIBUSB_TRANSFER_TIMED_OUT: /* We may have received some data though. */
+ break;
+ default:
+ // FIXME
+ return;
+ }
+
+ saleae_logicpro_convert_data(sdi, (uint32_t*)transfer->buffer, 16*1024/4);
+ saleae_logicpro_send_data(sdi, devc->conv_buffer, devc->conv_size, 2);
+
+ if ((ret = libusb_submit_transfer(transfer)) != LIBUSB_SUCCESS)
+ sr_dbg("FIXME resubmit failed");
}
projects / libsigrok.git / commitdiff