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6c6bc80a C |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
f2a66a8e | 4 | * Copyright (C) 2015 Christer Ekholm <christerekholm@gmail.com> |
6c6bc80a C |
5 | * |
6 | * This program is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <config.h> | |
21 | #include "protocol.h" | |
22 | ||
f2a66a8e | 23 | SR_PRIV int hantek_6xxx_open(struct sr_dev_inst *sdi) |
6c6bc80a | 24 | { |
6c6bc80a | 25 | struct dev_context *devc; |
f2a66a8e C |
26 | struct drv_context *drvc = sdi->driver->context; |
27 | struct sr_usb_dev_inst *usb; | |
28 | struct libusb_device_descriptor des; | |
29 | libusb_device **devlist; | |
30 | int err, i; | |
31 | char connection_id[64]; | |
6c6bc80a | 32 | |
f2a66a8e C |
33 | devc = sdi->priv; |
34 | usb = sdi->conn; | |
6c6bc80a | 35 | |
f2a66a8e C |
36 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); |
37 | for (i = 0; devlist[i]; i++) { | |
c940b7a3 | 38 | libusb_get_device_descriptor(devlist[i], &des); |
6c6bc80a | 39 | |
f2a66a8e C |
40 | if (des.idVendor != devc->profile->fw_vid |
41 | || des.idProduct != devc->profile->fw_pid) | |
42 | continue; | |
43 | ||
44 | if ((sdi->status == SR_ST_INITIALIZING) || | |
45 | (sdi->status == SR_ST_INACTIVE)) { | |
46 | /* | |
47 | * Check device by its physical USB bus/port address. | |
48 | */ | |
49 | usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)); | |
50 | if (strcmp(sdi->connection_id, connection_id)) | |
51 | /* This is not the one. */ | |
52 | continue; | |
53 | } | |
54 | ||
55 | if (!(err = libusb_open(devlist[i], &usb->devhdl))) { | |
56 | if (usb->address == 0xff) { | |
57 | /* | |
58 | * First time we touch this device after firmware upload, | |
59 | * so we don't know the address yet. | |
60 | */ | |
61 | usb->address = libusb_get_device_address(devlist[i]); | |
62 | } | |
63 | ||
64 | sdi->status = SR_ST_ACTIVE; | |
65 | sr_info("Opened device on %d.%d (logical) / " | |
66 | "%s (physical) interface %d.", | |
67 | usb->bus, usb->address, | |
68 | sdi->connection_id, USB_INTERFACE); | |
69 | } else { | |
70 | sr_err("Failed to open device: %s.", | |
71 | libusb_error_name(err)); | |
72 | } | |
73 | ||
74 | /* If we made it here, we handled the device (somehow). */ | |
75 | break; | |
6c6bc80a C |
76 | } |
77 | ||
f2a66a8e C |
78 | libusb_free_device_list(devlist, 1); |
79 | ||
80 | if (sdi->status != SR_ST_ACTIVE) | |
81 | return SR_ERR; | |
82 | ||
83 | return SR_OK; | |
84 | } | |
85 | ||
86 | SR_PRIV void hantek_6xxx_close(struct sr_dev_inst *sdi) | |
87 | { | |
88 | struct sr_usb_dev_inst *usb; | |
89 | ||
90 | usb = sdi->conn; | |
91 | ||
92 | if (!usb->devhdl) | |
93 | return; | |
94 | ||
95 | sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.", | |
96 | usb->bus, usb->address, sdi->connection_id, USB_INTERFACE); | |
97 | libusb_release_interface(usb->devhdl, USB_INTERFACE); | |
98 | libusb_close(usb->devhdl); | |
99 | usb->devhdl = NULL; | |
100 | sdi->status = SR_ST_INACTIVE; | |
101 | } | |
102 | ||
103 | SR_PRIV int hantek_6xxx_get_channeldata(const struct sr_dev_inst *sdi, | |
104 | libusb_transfer_cb_fn cb, uint32_t data_amount) | |
105 | { | |
106 | struct sr_usb_dev_inst *usb; | |
107 | struct libusb_transfer *transfer; | |
108 | int ret; | |
109 | unsigned char *buf; | |
110 | ||
111 | sr_dbg("Request channel data."); | |
112 | ||
113 | usb = sdi->conn; | |
114 | ||
115 | if (!(buf = g_try_malloc(data_amount))) { | |
116 | sr_err("Failed to malloc USB endpoint buffer."); | |
117 | return SR_ERR_MALLOC; | |
118 | } | |
119 | transfer = libusb_alloc_transfer(0); | |
120 | libusb_fill_bulk_transfer(transfer, usb->devhdl, HANTEK_EP_IN, buf, | |
121 | data_amount, cb, (void *)sdi, 4000); | |
8d6d7d5d | 122 | if ((ret = libusb_submit_transfer(transfer)) < 0) { |
f2a66a8e C |
123 | sr_err("Failed to submit transfer: %s.", |
124 | libusb_error_name(ret)); | |
125 | /* TODO: Free them all. */ | |
126 | libusb_free_transfer(transfer); | |
127 | g_free(buf); | |
128 | return SR_ERR; | |
129 | } | |
130 | ||
131 | return SR_OK; | |
132 | } | |
133 | ||
134 | static uint8_t samplerate_to_reg(uint64_t samplerate) | |
135 | { | |
136 | const uint64_t samplerate_values[] = {SAMPLERATE_VALUES}; | |
137 | const uint8_t samplerate_regs[] = {SAMPLERATE_REGS}; | |
138 | uint32_t i; | |
139 | ||
140 | for (i = 0; i < ARRAY_SIZE(samplerate_values); i++) { | |
141 | if (samplerate_values[i] == samplerate) | |
142 | return samplerate_regs[i]; | |
143 | } | |
144 | ||
145 | sr_err("Failed to convert samplerate: %" PRIu64 ".", samplerate); | |
146 | ||
147 | return samplerate_regs[ARRAY_SIZE(samplerate_values) - 1]; | |
148 | } | |
149 | ||
150 | static uint8_t voltage_to_reg(uint8_t state) | |
151 | { | |
152 | const uint8_t vdiv_reg[] = {VDIV_REG}; | |
153 | ||
154 | if (state < ARRAY_SIZE(vdiv_reg)) { | |
155 | return vdiv_reg[state]; | |
156 | } else { | |
157 | sr_err("Failed to convert vdiv: %d.", state); | |
158 | return vdiv_reg[ARRAY_SIZE(vdiv_reg) - 1]; | |
159 | } | |
160 | } | |
161 | ||
162 | static int write_control(const struct sr_dev_inst *sdi, | |
163 | enum control_requests reg, uint8_t value) | |
164 | { | |
165 | struct sr_usb_dev_inst *usb = sdi->conn; | |
166 | int ret; | |
167 | ||
168 | sr_spew("hantek_6xxx_write_control: 0x%x 0x%x", reg, value); | |
169 | ||
170 | if ((ret = libusb_control_transfer(usb->devhdl, | |
171 | LIBUSB_REQUEST_TYPE_VENDOR, (uint8_t)reg, | |
172 | 0, 0, &value, 1, 100)) <= 0) { | |
173 | sr_err("Failed to control transfer: 0x%x: %s.", reg, | |
174 | libusb_error_name(ret)); | |
175 | return ret; | |
176 | } | |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
181 | SR_PRIV int hantek_6xxx_start_data_collecting(const struct sr_dev_inst *sdi) | |
182 | { | |
183 | sr_dbg("trigger"); | |
184 | return write_control(sdi, TRIGGER_REG, 1); | |
185 | } | |
186 | ||
187 | SR_PRIV int hantek_6xxx_stop_data_collecting(const struct sr_dev_inst *sdi) | |
188 | { | |
189 | return write_control(sdi, TRIGGER_REG, 0); | |
190 | } | |
191 | ||
192 | SR_PRIV int hantek_6xxx_update_samplerate(const struct sr_dev_inst *sdi) | |
193 | { | |
194 | struct dev_context *devc = sdi->priv; | |
195 | sr_dbg("update samplerate %d", samplerate_to_reg(devc->samplerate)); | |
196 | ||
197 | return write_control(sdi, SAMPLERATE_REG, samplerate_to_reg(devc->samplerate)); | |
198 | } | |
199 | ||
200 | SR_PRIV int hantek_6xxx_update_vdiv(const struct sr_dev_inst *sdi) | |
201 | { | |
202 | struct dev_context *devc = sdi->priv; | |
203 | int ret1, ret2; | |
204 | ||
205 | sr_dbg("update vdiv %d %d", voltage_to_reg(devc->voltage[0]), | |
206 | voltage_to_reg(devc->voltage[1])); | |
207 | ||
208 | ret1 = write_control(sdi, VDIV_CH1_REG, voltage_to_reg(devc->voltage[0])); | |
209 | ret2 = write_control(sdi, VDIV_CH2_REG, voltage_to_reg(devc->voltage[1])); | |
210 | ||
211 | return MIN(ret1, ret2); | |
212 | } | |
213 | ||
cc5ebc8a BL |
214 | SR_PRIV int hantek_6xxx_update_coupling(const struct sr_dev_inst *sdi) |
215 | { | |
216 | struct dev_context *devc = sdi->priv; | |
217 | uint8_t coupling = 0xFF & ((devc->coupling[1] << 4) | devc->coupling[0]); | |
218 | ||
817b7441 EM |
219 | if (devc->has_coupling) { |
220 | sr_dbg("update coupling 0x%x", coupling); | |
221 | return write_control(sdi, COUPLING_REG, coupling); | |
222 | } else { | |
223 | sr_dbg("coupling not supported"); | |
224 | return SR_OK; | |
225 | } | |
cc5ebc8a BL |
226 | } |
227 | ||
f2a66a8e C |
228 | SR_PRIV int hantek_6xxx_update_channels(const struct sr_dev_inst *sdi) |
229 | { | |
230 | struct dev_context *devc = sdi->priv; | |
231 | uint8_t chan = devc->ch_enabled[1] ? 2 : 1; | |
232 | sr_dbg("update channels amount %d", chan); | |
233 | ||
234 | return write_control(sdi, CHANNELS_REG, chan); | |
235 | } | |
236 | ||
237 | SR_PRIV int hantek_6xxx_init(const struct sr_dev_inst *sdi) | |
238 | { | |
239 | sr_dbg("Initializing"); | |
240 | ||
241 | hantek_6xxx_update_samplerate(sdi); | |
242 | hantek_6xxx_update_vdiv(sdi); | |
cc5ebc8a | 243 | hantek_6xxx_update_coupling(sdi); |
f2a66a8e C |
244 | // hantek_6xxx_update_channels(sdi); /* Only 2 channel mode supported. */ |
245 | ||
246 | return SR_OK; | |
6c6bc80a | 247 | } |