Commit 5089a143 authored by Andreas Zschunke's avatar Andreas Zschunke Committed by Uwe Hermann

hantek-4032l: Add initial driver implementation.

[Note: This patch is basically a squashed version of the initial driver
commits by Andreas Zschunke <andreas.zschunke@gmx.net>, two fixes by
Andrej Valek <andy@skyrain.eu>, and various coding style / cosmetic
fixes by Uwe Hermann <uwe@hermann-uwe.de> to make the driver a lot more
consistent with the rest of the libsigrok code-base.]
parent 6a25fa42
......@@ -324,18 +324,18 @@ src_libdrivers_la_SOURCES += \
src/hardware/hameg-hmo/protocol.c \
src/hardware/hameg-hmo/api.c
endif
if HW_HANTEK_6XXX
src_libdrivers_la_SOURCES += \
src/hardware/hantek-6xxx/protocol.h \
src/hardware/hantek-6xxx/protocol.c \
src/hardware/hantek-6xxx/api.c
endif
if HW_HANTEK_4032L
src_libdrivers_la_SOURCES += \
src/hardware/hantek-4032l/protocol.h \
src/hardware/hantek-4032l/protocol.c \
src/hardware/hantek-4032l/api.c
endif
if HW_HANTEK_6XXX
src_libdrivers_la_SOURCES += \
src/hardware/hantek-6xxx/protocol.h \
src/hardware/hantek-6xxx/protocol.c \
src/hardware/hantek-6xxx/api.c
endif
if HW_HANTEK_DSO
src_libdrivers_la_SOURCES += \
src/hardware/hantek-dso/protocol.h \
......
......@@ -240,7 +240,7 @@ SR_DRIVER([fx2lafw], [fx2lafw], [libusb])
SR_DRIVER([GMC MH 1x/2x], [gmc-mh-1x-2x], [libserialport])
SR_DRIVER([GW Instek GDS-800], [gwinstek-gds-800], [libserialport])
SR_DRIVER([Hameg HMO], [hameg-hmo], [libserialport])
SR_DRIVER([Hantek 4032L], [hantek-4032l])
SR_DRIVER([Hantek 4032L], [hantek-4032l], [libusb])
SR_DRIVER([Hantek 6xxx], [hantek-6xxx], [libusb])
SR_DRIVER([Hantek DSO], [hantek-dso], [libusb])
SR_DRIVER([HP 3457A], [hp-3457a])
......
/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2016 Andreas Zschunke <andreasz77@gmx.net>
* Copyright (C) 2016 Andreas Zschunke <andreas.zschunke@gmx.net>
* Copyright (C) 2017 Andrej Valek <andy@skyrain.eu>
* Copyright (C) 2017 Uwe Hermann <uwe@hermann-uwe.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
......@@ -20,67 +22,267 @@
#include <config.h>
#include "protocol.h"
SR_PRIV struct sr_dev_driver hantek_4032l_driver_info;
#define USB_INTERFACE 0
#define NUM_CHANNELS 32
static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
{
return std_init(sr_ctx, di, LOG_PREFIX);
}
static const uint32_t scanopts[] = {
SR_CONF_CONN,
};
static const uint32_t drvopts[] = {
SR_CONF_LOGIC_ANALYZER,
};
static const uint32_t devopts[] = {
SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
SR_CONF_CONN | SR_CONF_GET,
SR_CONF_VOLTAGE_THRESHOLD | SR_CONF_SET | SR_CONF_LIST,
};
static const int32_t trigger_matches[] = {
SR_TRIGGER_ZERO,
SR_TRIGGER_ONE,
SR_TRIGGER_RISING,
SR_TRIGGER_FALLING,
SR_TRIGGER_EDGE,
};
static const uint64_t samplerates[] = {
SR_KHZ(1),
SR_KHZ(2),
SR_KHZ(4),
SR_KHZ(8),
SR_KHZ(16),
SR_HZ(31250),
SR_HZ(62500),
SR_KHZ(125),
SR_KHZ(250),
SR_KHZ(500),
SR_KHZ(625),
SR_HZ(781250),
SR_MHZ(1),
SR_KHZ(1250),
SR_HZ(1562500),
SR_MHZ(2),
SR_KHZ(2500),
SR_KHZ(3125),
SR_MHZ(4),
SR_MHZ(5),
SR_KHZ(6250),
SR_MHZ(10),
SR_KHZ(12500),
SR_MHZ(20),
SR_MHZ(25),
SR_MHZ(40),
SR_MHZ(50),
SR_MHZ(80),
SR_MHZ(100),
SR_MHZ(160),
SR_MHZ(200),
SR_MHZ(320),
SR_MHZ(400),
};
static const uint64_t samplerates_hw[] = {
SR_MHZ(100),
SR_MHZ(50),
SR_MHZ(25),
SR_KHZ(12500),
SR_KHZ(6250),
SR_KHZ(3125),
SR_HZ(1562500),
SR_HZ(781250),
SR_MHZ(80),
SR_MHZ(40),
SR_MHZ(20),
SR_MHZ(10),
SR_MHZ(5),
SR_KHZ(2500),
SR_KHZ(1250),
SR_KHZ(625),
SR_MHZ(4),
SR_MHZ(2),
SR_MHZ(1),
SR_KHZ(500),
SR_KHZ(250),
SR_KHZ(125),
SR_HZ(62500),
SR_HZ(31250),
SR_KHZ(16),
SR_KHZ(8),
SR_KHZ(4),
SR_KHZ(2),
SR_KHZ(1),
0,
0,
0,
SR_MHZ(200),
SR_MHZ(160),
SR_MHZ(400),
SR_MHZ(320),
};
SR_PRIV struct sr_dev_driver hantek_4032l_driver_info;
static GSList *scan(struct sr_dev_driver *di, GSList *options)
{
struct drv_context *drvc;
GSList *devices;
(void)options;
struct drv_context *drvc = di->context;
GSList *l, *devices, *conn_devices;
libusb_device **devlist;
struct libusb_device_descriptor des;
const char *conn;
int i;
char connection_id[64];
struct sr_channel_group *cg;
struct sr_dev_inst *sdi;
struct sr_channel *ch;
devices = NULL;
drvc = di->context;
conn_devices = NULL;
drvc->instances = NULL;
conn = NULL;
for (l = options; l; l = l->next) {
struct sr_config *src = l->data;
if (src->key == SR_CONF_CONN) {
conn = g_variant_get_string(src->data, NULL);
break;
}
}
/* TODO: scan for devices, either based on a SR_CONF_CONN option
* or on a USB scan. */
return devices;
}
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 (i = 0; devlist[i]; i++) {
if (conn) {
struct sr_usb_dev_inst *usb = NULL;
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);
if (des.idVendor != H4032L_USB_VENDOR ||
des.idProduct != H4032L_USB_PRODUCT)
continue;
usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
sdi = g_malloc0(sizeof(struct sr_dev_inst));
sdi->driver = &hantek_4032l_driver_info;
sdi->vendor = g_strdup("Hantek");
sdi->model = g_strdup("4032L");
sdi->connection_id = g_strdup(connection_id);
struct sr_channel_group *channel_groups[2];
for (int j = 0; j < 2; j++) {
cg = g_malloc0(sizeof(struct sr_channel_group));
cg->name = g_strdup_printf("%c", 'A' + j);
channel_groups[j] = cg;
sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
}
/* Assemble channel list and add channel to channel groups. */
for (int j = 0; j < NUM_CHANNELS; j++) {
char channel_name[4];
sprintf(channel_name, "%c%d", 'A' + (j & 1), j / 2);
ch = sr_channel_new(sdi, j, SR_CHANNEL_LOGIC, TRUE, channel_name);
cg = channel_groups[j & 1];
cg->channels = g_slist_append(cg->channels, ch);
}
struct dev_context *devc = g_malloc0(sizeof(struct dev_context));
/* Initialize command packet. */
devc->cmd_pkt.magic = H4032L_CMD_PKT_MAGIC;
devc->cmd_pkt.pwm_a = h4032l_voltage2pwm(2.5);
devc->cmd_pkt.pwm_b = h4032l_voltage2pwm(2.5);
devc->cmd_pkt.sample_size = 16384;
devc->cmd_pkt.pre_trigger_size = 1024;
devc->status = H4032L_STATUS_IDLE;
devc->capture_ratio = 5;
devc->usb_transfer = libusb_alloc_transfer(0);
sdi->priv = devc;
devices = g_slist_append(devices, sdi);
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);
}
static GSList *dev_list(const struct sr_dev_driver *di)
{
return ((struct drv_context *)(di->context))->instances;
}
g_slist_free_full(conn_devices, (GDestroyNotify)sr_usb_dev_inst_free);
libusb_free_device_list(devlist, 1);
static int dev_clear(const struct sr_dev_driver *di)
{
return std_dev_clear(di, NULL);
return std_scan_complete(di, devices);
}
static int dev_open(struct sr_dev_inst *sdi)
{
(void)sdi;
struct sr_usb_dev_inst *usb = sdi->conn;
int ret;
/* TODO: get handle from sdi->conn and open it. */
ret = h4032l_dev_open(sdi);
if (ret != SR_OK) {
sr_err("Unable to open device.");
return SR_ERR;
}
sdi->status = SR_ST_ACTIVE;
ret = libusb_claim_interface(usb->devhdl, USB_INTERFACE);
if (ret != 0) {
switch (ret) {
case LIBUSB_ERROR_BUSY:
sr_err("Unable to claim USB interface. Another "
"program or driver has already claimed it.");
break;
case LIBUSB_ERROR_NO_DEVICE:
sr_err("Device has been disconnected.");
break;
default:
sr_err("Unable to claim interface: %s.",
libusb_error_name(ret));
break;
}
return SR_ERR;
}
return SR_OK;
}
static int dev_close(struct sr_dev_inst *sdi)
{
(void)sdi;
struct sr_usb_dev_inst *usb;
/* TODO: get handle from sdi->conn and close it. */
usb = sdi->conn;
sdi->status = SR_ST_INACTIVE;
if (!usb->devhdl)
return SR_ERR_BUG;
return SR_OK;
}
static int cleanup(const struct sr_dev_driver *di)
{
dev_clear(di);
/* TODO: free other driver resources, if any. */
sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
libusb_release_interface(usb->devhdl, USB_INTERFACE);
libusb_close(usb->devhdl);
usb->devhdl = NULL;
return SR_OK;
}
......@@ -88,82 +290,217 @@ static int cleanup(const struct sr_dev_driver *di)
static int config_get(uint32_t key, GVariant **data,
const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
int ret;
struct dev_context *devc = sdi->priv;
struct sr_usb_dev_inst *usb;
(void)sdi;
(void)data;
(void)cg;
ret = SR_OK;
switch (key) {
/* TODO */
case SR_CONF_SAMPLERATE:
*data = g_variant_new_uint64(samplerates_hw[devc->cmd_pkt.sample_rate]);
break;
case SR_CONF_CAPTURE_RATIO:
*data = g_variant_new_uint64(devc->capture_ratio);
break;
case SR_CONF_LIMIT_SAMPLES:
*data = g_variant_new_uint64(devc->cmd_pkt.sample_size);
break;
case SR_CONF_CONN:
if (!sdi || !(usb = sdi->conn))
return SR_ERR_ARG;
*data = g_variant_new_printf("%d.%d", usb->bus, usb->address);
break;
default:
return SR_ERR_NA;
}
return ret;
return SR_OK;
}
static int config_set(uint32_t key, GVariant *data,
const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
int ret;
struct dev_context *devc = sdi->priv;
struct h4032l_cmd_pkt *cmd_pkt = &devc->cmd_pkt;
(void)data;
(void)cg;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
ret = SR_OK;
switch (key) {
/* TODO */
default:
ret = SR_ERR_NA;
case SR_CONF_SAMPLERATE: {
uint64_t sample_rate = g_variant_get_uint64(data);
uint8_t i = 0;
while (i < ARRAY_SIZE(samplerates_hw) && samplerates_hw[i] != sample_rate)
i++;
if (i == ARRAY_SIZE(samplerates_hw) || sample_rate == 0) {
sr_err("invalid sample rate");
return SR_ERR_SAMPLERATE;
}
cmd_pkt->sample_rate = i;
return SR_OK;
}
case SR_CONF_CAPTURE_RATIO:
devc->capture_ratio = g_variant_get_uint64(data);
return SR_OK;
case SR_CONF_LIMIT_SAMPLES: {
uint64_t number_samples = g_variant_get_uint64(data);
number_samples += 511;
number_samples &= 0xfffffe00;
if (number_samples < 2048
|| number_samples > 64 * 1024 * 1024) {
sr_err("invalid sample range 2k...64M: %ld",
number_samples);
return SR_ERR;
}
cmd_pkt->sample_size = number_samples;
return SR_OK;
}
case SR_CONF_VOLTAGE_THRESHOLD: {
double d1, d2;
g_variant_get(data, "(dd)", &d1, &d2);
devc->cmd_pkt.pwm_a = h4032l_voltage2pwm(d1);
devc->cmd_pkt.pwm_b = h4032l_voltage2pwm(d2);
return SR_OK;
}
}
return ret;
return SR_ERR_NA;
}
static int config_list(uint32_t key, GVariant **data,
const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
{
int ret;
(void)sdi;
(void)data;
(void)cg;
ret = SR_OK;
switch (key) {
/* TODO */
case SR_CONF_SCAN_OPTIONS:
case SR_CONF_DEVICE_OPTIONS:
return STD_CONFIG_LIST(key, data, sdi, cg, scanopts, drvopts, devopts);
case SR_CONF_SAMPLERATE:
*data = std_gvar_samplerates(ARRAY_AND_SIZE(samplerates));
break;
case SR_CONF_TRIGGER_MATCH:
*data = std_gvar_array_i32(ARRAY_AND_SIZE(trigger_matches));
break;
case SR_CONF_VOLTAGE_THRESHOLD:
*data = std_gvar_tuple_double(2.5, 2.5);
break;
default:
return SR_ERR_NA;
}
return ret;
return SR_OK;
}
static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
static int dev_acquisition_start(const struct sr_dev_inst *sdi)
{
(void)sdi;
(void)cb_data;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
struct sr_dev_driver *di = sdi->driver;
struct drv_context *drvc = di->context;
struct dev_context *devc = sdi->priv;
struct sr_trigger *trigger = sr_session_trigger_get(sdi->session);
struct h4032l_cmd_pkt *cmd_pkt = &devc->cmd_pkt;
/* Calculate packet ratio. */
cmd_pkt->pre_trigger_size = (cmd_pkt->sample_size * devc->capture_ratio) / 100;
cmd_pkt->trig_flags.enable_trigger1 = 0;
cmd_pkt->trig_flags.enable_trigger2 = 0;
cmd_pkt->trig_flags.trigger_and_logic = 0;
if (trigger && trigger->stages) {
GSList *stages = trigger->stages;
struct sr_trigger_stage *stage1 = stages->data;
if (stages->next) {
sr_err("only one trigger stage supported for now");
return SR_ERR;
}
cmd_pkt->trig_flags.enable_trigger1 = 1;
cmd_pkt->trigger[0].flags.edge_type = H4032L_TRIGGER_EDGE_TYPE_DISABLED;
cmd_pkt->trigger[0].flags.data_range_enabled = 0;
cmd_pkt->trigger[0].flags.time_range_enabled = 0;
cmd_pkt->trigger[0].flags.combined_enabled = 0;
cmd_pkt->trigger[0].flags.data_range_type = H4032L_TRIGGER_DATA_RANGE_TYPE_MAX;
cmd_pkt->trigger[0].data_range_mask = 0;
cmd_pkt->trigger[0].data_range_max = 0;
/* Initialize range mask values. */
uint32_t range_mask = 0;
uint32_t range_value = 0;
GSList *channel = stage1->matches;
while (channel) {
struct sr_trigger_match *match = channel->data;
switch (match->match) {
case SR_TRIGGER_ZERO:
range_mask |= (1 << match->channel->index);
break;
case SR_TRIGGER_ONE:
range_mask |= (1 << match->channel->index);
range_value |= (1 << match->channel->index);
break;
case SR_TRIGGER_RISING:
if (cmd_pkt->trigger[0].flags.edge_type != H4032L_TRIGGER_EDGE_TYPE_DISABLED) {
sr_err("only one trigger signal with fall/rising/edge allowed");
return SR_ERR;
}
cmd_pkt->trigger[0].flags.edge_type = H4032L_TRIGGER_EDGE_TYPE_RISE;
cmd_pkt->trigger[0].flags.edge_signal = match->channel->index;
break;
case SR_TRIGGER_FALLING:
if (cmd_pkt->trigger[0].flags.edge_type != H4032L_TRIGGER_EDGE_TYPE_DISABLED) {
sr_err("only one trigger signal with fall/rising/edge allowed");
return SR_ERR;
}
cmd_pkt->trigger[0].flags.edge_type = H4032L_TRIGGER_EDGE_TYPE_FALL;
cmd_pkt->trigger[0].flags.edge_signal = match->channel->index;
break;
case SR_TRIGGER_EDGE:
if (cmd_pkt->trigger[0].flags.edge_type != H4032L_TRIGGER_EDGE_TYPE_DISABLED) {
sr_err("only one trigger signal with fall/rising/edge allowed");
return SR_ERR;
}
cmd_pkt->trigger[0].flags.edge_type = H4032L_TRIGGER_EDGE_TYPE_TOGGLE;
cmd_pkt->trigger[0].flags.edge_signal = match->channel->index;
break;
default:
sr_err("unknown trigger value");
return SR_ERR;
}
channel = channel->next;
}
/* Compress range mask value and apply range settings. */
if (range_mask) {
cmd_pkt->trigger[0].flags.data_range_enabled = 1;
cmd_pkt->trigger[0].data_range_mask |= (range_mask);
uint32_t new_range_value = 0;
uint32_t bit_mask = 1;
while (range_mask) {
if ((range_mask & 1) != 0) {
new_range_value <<= 1;
if ((range_value & 1) != 0)
new_range_value |= bit_mask;
bit_mask <<= 1;
}
range_mask >>= 1;
range_value >>= 1;
}
cmd_pkt->trigger[0].data_range_max |= range_value;
}
}
/* TODO: configure hardware, reset acquisition state, set up
* callbacks and send header packet. */
usb_source_add(sdi->session, drvc->sr_ctx, 10000,
h4032l_receive_data, sdi->driver->context);
return SR_OK;
/* Start capturing. */
return h4032l_start(sdi);
}
static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
static int dev_acquisition_stop(struct sr_dev_inst *sdi)
{
(void)cb_data;
if (sdi->status != SR_ST_ACTIVE)
return SR_ERR_DEV_CLOSED;
(void)sdi;
/* TODO: stop acquisition. */
......@@ -172,13 +509,13 @@ static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
SR_PRIV struct sr_dev_driver hantek_4032l_driver_info = {
.name = "hantek-4032l",
.longname = "Hantek 4032l",
.longname = "Hantek 4032L",
.api_version = 1,
.init = init,
.cleanup = cleanup,
.init = std_init,
.cleanup = std_cleanup,
.scan = scan,
.dev_list = dev_list,
.dev_clear = dev_clear,
.dev_list = std_dev_list,
.dev_clear = std_dev_clear,
.config_get = config_get,
.config_set = config_set,
.config_list = config_list,
......@@ -188,3 +525,4 @@ SR_PRIV struct sr_dev_driver hantek_4032l_driver_info = {
.dev_acquisition_stop = dev_acquisition_stop,
.context = NULL,
};
SR_REGISTER_DEV_DRIVER(hantek_4032l_driver_info);
/*
* This file is part of the libsigrok project.
*
* Copyright (C) 2016 Andreas Zschunke <andreasz77@gmx.net>
* Copyright (C) 2016 Andreas Zschunke <andreas.zschunke@gmx.net>
* Copyright (C) 2017 Andrej Valek <andy@skyrain.eu>
* Copyright (C) 2017 Uwe Hermann <uwe@hermann-uwe.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
......@@ -20,22 +22,270 @@
#include <config.h>
#include "protocol.h"
SR_PRIV int hantek_4032l_receive_data(int fd, int revents, void *cb_data)
#define H4032L_USB_TIMEOUT 500
enum h4032l_cmd {
CMD_CONFIGURE = 0x2b1a, /* Also arms the logic analyzer. */
CMD_STATUS = 0x4b3a,
CMD_GET = 0x6b5a
};
struct __attribute__((__packed__)) h4032l_status_packet {
uint32_t magic;
uint32_t values;
uint32_t status;
};
SR_PRIV int h4032l_receive_data(int fd, int revents, void *cb_data)
{
const struct sr_dev_inst *sdi;
struct dev_context *devc;
struct timeval tv;
struct drv_context *drvc;
(void)fd;
(void)revents;
drvc = (struct drv_context *)cb_data;
tv.tv_sec = tv.tv_usec = 0;
libusb_handle_events_timeout(drvc->sr_ctx->libusb_ctx, &tv);
if (!(sdi = cb_data))
return TRUE;
return TRUE;
}
if (!(devc = sdi->priv))
return TRUE;
void LIBUSB_CALL h4032l_usb_callback(struct libusb_transfer *transfer)
{
const struct sr_dev_inst *sdi = transfer->user_data;
struct dev_context *devc = sdi->priv;
struct drv_context *drvc = sdi->driver->context;
struct sr_usb_dev_inst *usb = sdi->conn;
gboolean cmd = FALSE;
uint32_t max_samples = 512 / sizeof(uint32_t);
uint32_t *buffer;
struct h4032l_status_packet *status;
struct sr_datafeed_packet packet;
struct sr_datafeed_logic logic;
uint32_t number_samples;
int ret;
if (revents == G_IO_IN) {
/* TODO */
if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
sr_err("%s error: %d.", __func__, transfer->status);
return;
}
return TRUE;
buffer = (uint32_t *)transfer->buffer;
switch (devc->status) {
case H4032L_STATUS_IDLE:
sr_err("USB callback called in idle.");
break;
case H4032L_STATUS_CMD_CONFIGURE:
/* Select status request as next. */
cmd = TRUE;
devc->cmd_pkt.cmd = CMD_STATUS;
devc->status = H4032L_STATUS_CMD_STATUS;
break;
case H4032L_STATUS_CMD_STATUS:
/* Select status request as next. */
devc->status = H4032L_STATUS_RESPONSE_STATUS;
break;
case H4032L_STATUS_RESPONSE_STATUS:
/*
* Check magic and if status is complete, then select
* First Transfer as next.
*/
status = (struct h4032l_status_packet *)transfer->buffer;
if (status->magic != H4032L_STATUS_PACKET_MAGIC) {
devc->status = H4032L_STATUS_CMD_STATUS;
devc->cmd_pkt.cmd = CMD_STATUS;