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1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2015 Christer Ekholm <christerekholm@gmail.com> | |
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 | ||
23 | SR_PRIV int hantek_6xxx_open(struct sr_dev_inst *sdi) | |
24 | { | |
25 | struct dev_context *devc; | |
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 = SR_ERR, i; | |
31 | char connection_id[64]; | |
32 | ||
33 | devc = sdi->priv; | |
34 | usb = sdi->conn; | |
35 | ||
36 | libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist); | |
37 | for (i = 0; devlist[i]; i++) { | |
38 | libusb_get_device_descriptor(devlist[i], &des); | |
39 | ||
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 | if (usb_get_port_path(devlist[i], connection_id, sizeof(connection_id)) < 0) | |
50 | continue; | |
51 | ||
52 | if (strcmp(sdi->connection_id, connection_id)) | |
53 | /* This is not the one. */ | |
54 | continue; | |
55 | } | |
56 | ||
57 | if (!(err = libusb_open(devlist[i], &usb->devhdl))) { | |
58 | if (usb->address == 0xff) { | |
59 | /* | |
60 | * First time we touch this device after firmware upload, | |
61 | * so we don't know the address yet. | |
62 | */ | |
63 | usb->address = libusb_get_device_address(devlist[i]); | |
64 | } | |
65 | ||
66 | sr_info("Opened device on %d.%d (logical) / " | |
67 | "%s (physical) interface %d.", | |
68 | usb->bus, usb->address, | |
69 | sdi->connection_id, USB_INTERFACE); | |
70 | ||
71 | err = SR_OK; | |
72 | } else { | |
73 | sr_err("Failed to open device: %s.", | |
74 | libusb_error_name(err)); | |
75 | err = SR_ERR; | |
76 | } | |
77 | ||
78 | /* If we made it here, we handled the device (somehow). */ | |
79 | break; | |
80 | } | |
81 | ||
82 | libusb_free_device_list(devlist, 1); | |
83 | ||
84 | return err; | |
85 | } | |
86 | ||
87 | SR_PRIV void hantek_6xxx_close(struct sr_dev_inst *sdi) | |
88 | { | |
89 | struct sr_usb_dev_inst *usb; | |
90 | ||
91 | usb = sdi->conn; | |
92 | ||
93 | if (!usb->devhdl) | |
94 | return; | |
95 | ||
96 | sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.", | |
97 | usb->bus, usb->address, sdi->connection_id, USB_INTERFACE); | |
98 | libusb_release_interface(usb->devhdl, USB_INTERFACE); | |
99 | libusb_close(usb->devhdl); | |
100 | usb->devhdl = NULL; | |
101 | sdi->status = SR_ST_INACTIVE; | |
102 | } | |
103 | ||
104 | SR_PRIV int hantek_6xxx_get_channeldata(const struct sr_dev_inst *sdi, | |
105 | libusb_transfer_cb_fn cb, uint32_t data_amount) | |
106 | { | |
107 | struct sr_usb_dev_inst *usb; | |
108 | struct libusb_transfer *transfer; | |
109 | int ret; | |
110 | unsigned char *buf; | |
111 | ||
112 | sr_dbg("Request channel data."); | |
113 | ||
114 | usb = sdi->conn; | |
115 | ||
116 | if (!(buf = g_try_malloc(data_amount))) { | |
117 | sr_err("Failed to malloc USB endpoint buffer."); | |
118 | return SR_ERR_MALLOC; | |
119 | } | |
120 | transfer = libusb_alloc_transfer(0); | |
121 | libusb_fill_bulk_transfer(transfer, usb->devhdl, HANTEK_EP_IN, buf, | |
122 | data_amount, cb, (void *)sdi, 4000); | |
123 | if ((ret = libusb_submit_transfer(transfer)) < 0) { | |
124 | sr_err("Failed to submit transfer: %s.", | |
125 | libusb_error_name(ret)); | |
126 | /* TODO: Free them all. */ | |
127 | libusb_free_transfer(transfer); | |
128 | g_free(buf); | |
129 | return SR_ERR; | |
130 | } | |
131 | ||
132 | return SR_OK; | |
133 | } | |
134 | ||
135 | static uint8_t samplerate_to_reg(uint64_t samplerate) | |
136 | { | |
137 | const uint64_t samplerate_values[] = {SAMPLERATE_VALUES}; | |
138 | const uint8_t samplerate_regs[] = {SAMPLERATE_REGS}; | |
139 | uint32_t i; | |
140 | ||
141 | for (i = 0; i < ARRAY_SIZE(samplerate_values); i++) { | |
142 | if (samplerate_values[i] == samplerate) | |
143 | return samplerate_regs[i]; | |
144 | } | |
145 | ||
146 | sr_err("Failed to convert samplerate: %" PRIu64 ".", samplerate); | |
147 | ||
148 | return samplerate_regs[ARRAY_SIZE(samplerate_values) - 1]; | |
149 | } | |
150 | ||
151 | static uint8_t voltage_to_reg(uint8_t state) | |
152 | { | |
153 | const uint8_t vdiv_reg[] = {VDIV_REG}; | |
154 | ||
155 | if (state < ARRAY_SIZE(vdiv_reg)) { | |
156 | return vdiv_reg[state]; | |
157 | } else { | |
158 | sr_err("Failed to convert vdiv: %d.", state); | |
159 | return vdiv_reg[ARRAY_SIZE(vdiv_reg) - 1]; | |
160 | } | |
161 | } | |
162 | ||
163 | static int write_control(const struct sr_dev_inst *sdi, | |
164 | enum control_requests reg, uint8_t value) | |
165 | { | |
166 | struct sr_usb_dev_inst *usb = sdi->conn; | |
167 | int ret; | |
168 | ||
169 | sr_spew("hantek_6xxx_write_control: 0x%x 0x%x", reg, value); | |
170 | ||
171 | if ((ret = libusb_control_transfer(usb->devhdl, | |
172 | LIBUSB_REQUEST_TYPE_VENDOR, (uint8_t)reg, | |
173 | 0, 0, &value, 1, 100)) <= 0) { | |
174 | sr_err("Failed to control transfer: 0x%x: %s.", reg, | |
175 | libusb_error_name(ret)); | |
176 | return ret; | |
177 | } | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | SR_PRIV int hantek_6xxx_start_data_collecting(const struct sr_dev_inst *sdi) | |
183 | { | |
184 | sr_dbg("trigger"); | |
185 | return write_control(sdi, TRIGGER_REG, 1); | |
186 | } | |
187 | ||
188 | SR_PRIV int hantek_6xxx_stop_data_collecting(const struct sr_dev_inst *sdi) | |
189 | { | |
190 | return write_control(sdi, TRIGGER_REG, 0); | |
191 | } | |
192 | ||
193 | SR_PRIV int hantek_6xxx_update_samplerate(const struct sr_dev_inst *sdi) | |
194 | { | |
195 | struct dev_context *devc = sdi->priv; | |
196 | sr_dbg("update samplerate %d", samplerate_to_reg(devc->samplerate)); | |
197 | ||
198 | return write_control(sdi, SAMPLERATE_REG, samplerate_to_reg(devc->samplerate)); | |
199 | } | |
200 | ||
201 | SR_PRIV int hantek_6xxx_update_vdiv(const struct sr_dev_inst *sdi) | |
202 | { | |
203 | struct dev_context *devc = sdi->priv; | |
204 | int ret1, ret2; | |
205 | ||
206 | sr_dbg("update vdiv %d %d", voltage_to_reg(devc->voltage[0]), | |
207 | voltage_to_reg(devc->voltage[1])); | |
208 | ||
209 | ret1 = write_control(sdi, VDIV_CH1_REG, voltage_to_reg(devc->voltage[0])); | |
210 | ret2 = write_control(sdi, VDIV_CH2_REG, voltage_to_reg(devc->voltage[1])); | |
211 | ||
212 | return MIN(ret1, ret2); | |
213 | } | |
214 | ||
215 | SR_PRIV int hantek_6xxx_update_coupling(const struct sr_dev_inst *sdi) | |
216 | { | |
217 | struct dev_context *devc = sdi->priv; | |
218 | uint8_t coupling = 0xFF & ((devc->coupling[1] << 4) | devc->coupling[0]); | |
219 | ||
220 | if (devc->has_coupling) { | |
221 | sr_dbg("update coupling 0x%x", coupling); | |
222 | return write_control(sdi, COUPLING_REG, coupling); | |
223 | } else { | |
224 | sr_dbg("coupling not supported"); | |
225 | return SR_OK; | |
226 | } | |
227 | } | |
228 | ||
229 | SR_PRIV int hantek_6xxx_update_channels(const struct sr_dev_inst *sdi) | |
230 | { | |
231 | struct dev_context *devc = sdi->priv; | |
232 | uint8_t chan = devc->ch_enabled[1] ? 2 : 1; | |
233 | sr_dbg("update channels amount %d", chan); | |
234 | ||
235 | return write_control(sdi, CHANNELS_REG, chan); | |
236 | } | |
237 | ||
238 | SR_PRIV int hantek_6xxx_init(const struct sr_dev_inst *sdi) | |
239 | { | |
240 | sr_dbg("Initializing"); | |
241 | ||
242 | hantek_6xxx_update_samplerate(sdi); | |
243 | hantek_6xxx_update_vdiv(sdi); | |
244 | hantek_6xxx_update_coupling(sdi); | |
245 | // hantek_6xxx_update_channels(sdi); /* Only 2 channel mode supported. */ | |
246 | ||
247 | return SR_OK; | |
248 | } |