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5874e88d DE |
1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2014 Daniel Elstner <daniel.kitta@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 | #ifndef LIBSIGROK_HARDWARE_SYSCLK_LWLA_LWLA_H | |
21 | #define LIBSIGROK_HARDWARE_SYSCLK_LWLA_LWLA_H | |
22 | ||
5874e88d DE |
23 | #include <stdint.h> |
24 | #include <libusb.h> | |
25 | #include <glib.h> | |
c1aae900 | 26 | #include <libsigrok/libsigrok.h> |
5874e88d DE |
27 | |
28 | struct sr_usb_dev_inst; | |
29 | ||
e0df15d4 DE |
30 | /* Rotate argument n bits to the left. |
31 | * This construct is an idiom recognized by GCC as bit rotation. | |
32 | */ | |
33 | #define LROTATE(a, n) (((a) << (n)) | ((a) >> (CHAR_BIT * sizeof(a) - (n)))) | |
34 | ||
35 | /* Convert 16-bit little endian LWLA protocol word to machine word order. */ | |
36 | #define LWLA_TO_UINT16(val) GUINT16_FROM_LE(val) | |
37 | ||
38 | /* Convert 32-bit mixed endian LWLA protocol word to machine word order. */ | |
39 | #define LWLA_TO_UINT32(val) LROTATE(GUINT32_FROM_LE(val), 16) | |
40 | ||
41 | /* Convert 16-bit argument to LWLA protocol word. */ | |
5874e88d DE |
42 | #define LWLA_WORD(val) GUINT16_TO_LE(val) |
43 | ||
e0df15d4 DE |
44 | /* Extract 16-bit units in mixed endian order from 32/64-bit value. */ |
45 | #define LWLA_WORD_0(val) GUINT16_TO_LE(((val) >> 16) & 0xFFFF) | |
46 | #define LWLA_WORD_1(val) GUINT16_TO_LE((val) & 0xFFFF) | |
47 | #define LWLA_WORD_2(val) GUINT16_TO_LE(((val) >> 48) & 0xFFFF) | |
48 | #define LWLA_WORD_3(val) GUINT16_TO_LE(((val) >> 32) & 0xFFFF) | |
5874e88d | 49 | |
be64f90b DE |
50 | /* Maximum number of 16-bit words sent at a time during acquisition. |
51 | * Used for allocating the libusb transfer buffer. | |
52 | */ | |
53 | #define MAX_ACQ_SEND_LEN16 64 /* 43 for capture setup plus stuffing */ | |
54 | ||
55 | /* Maximum number of 32-bit words received at a time during acquisition. | |
56 | * This is a multiple of the endpoint buffer size to avoid transfer overflow | |
57 | * conditions. | |
58 | */ | |
59 | #define MAX_ACQ_RECV_LEN32 (2 * 512 / 4) | |
60 | ||
61 | /* Maximum length of a register read/write sequence. | |
62 | */ | |
63 | #define MAX_REG_SEQ_LEN 16 | |
64 | ||
65 | /* Logic datafeed packet size in bytes. | |
66 | * This is a multiple of both 4 and 5 to match any model's unit size | |
67 | * and memory granularity. | |
68 | */ | |
69 | #define PACKET_SIZE (5000 * 4 * 5) | |
70 | ||
5874e88d DE |
71 | /** USB device end points. |
72 | */ | |
be64f90b DE |
73 | enum usb_endpoint { |
74 | EP_COMMAND = 2, | |
75 | EP_CONFIG = 4, | |
76 | EP_REPLY = 6 | LIBUSB_ENDPOINT_IN | |
5874e88d DE |
77 | }; |
78 | ||
79 | /** LWLA protocol command ID codes. | |
80 | */ | |
be64f90b | 81 | enum command_id { |
5874e88d DE |
82 | CMD_READ_REG = 1, |
83 | CMD_WRITE_REG = 2, | |
be64f90b DE |
84 | CMD_READ_MEM32 = 3, |
85 | CMD_READ_MEM36 = 6, | |
86 | CMD_WRITE_LREGS = 7, | |
87 | CMD_READ_LREGS = 8, | |
5874e88d DE |
88 | }; |
89 | ||
90 | /** LWLA capture state flags. | |
be64f90b | 91 | * The bit positions are the same as in the LWLA1016 control register. |
5874e88d DE |
92 | */ |
93 | enum { | |
be64f90b DE |
94 | STATUS_CAPTURING = 1 << 2, |
95 | STATUS_TRIGGERED = 1 << 5, | |
96 | STATUS_MEM_AVAIL = 1 << 6, | |
5874e88d DE |
97 | }; |
98 | ||
be64f90b | 99 | /** LWLA1034 run-length encoding states. |
5874e88d | 100 | */ |
be64f90b DE |
101 | enum rle_state { |
102 | RLE_STATE_DATA, | |
103 | RLE_STATE_LEN | |
586ff70a DE |
104 | }; |
105 | ||
be64f90b | 106 | /** Register address/value pair. |
30f34dbd | 107 | */ |
be64f90b DE |
108 | struct regval { |
109 | unsigned int reg; | |
110 | uint32_t val; | |
30f34dbd DE |
111 | }; |
112 | ||
be64f90b | 113 | /** LWLA sample acquisition and decompression state. |
30f34dbd | 114 | */ |
be64f90b DE |
115 | struct acquisition_state { |
116 | uint64_t samples_max; /* maximum number of samples to process */ | |
117 | uint64_t samples_done; /* number of samples sent to the session bus */ | |
118 | uint64_t duration_max; /* maximum capture duration in milliseconds */ | |
119 | uint64_t duration_now; /* running capture duration since trigger */ | |
120 | ||
121 | uint64_t sample; /* last sample read from capture memory */ | |
122 | uint64_t run_len; /* remaining run length of current sample */ | |
123 | ||
124 | struct libusb_transfer *xfer_in; /* USB in transfer record */ | |
125 | struct libusb_transfer *xfer_out; /* USB out transfer record */ | |
126 | ||
127 | size_t mem_addr_fill; /* capture memory fill level */ | |
128 | size_t mem_addr_done; /* position up to which data was received */ | |
129 | size_t mem_addr_next; /* start address for next async read */ | |
130 | size_t mem_addr_stop; /* end of memory range to be read */ | |
131 | size_t in_index; /* position in read transfer buffer */ | |
132 | size_t out_index; /* position in logic packet buffer */ | |
133 | enum rle_state rle; /* RLE decoding state */ | |
134 | ||
135 | gboolean rle_enabled; /* capturing in timing-state mode */ | |
136 | gboolean clock_boost; /* switch to faster clock during capture */ | |
137 | unsigned int status; /* last received device status */ | |
138 | ||
139 | unsigned int reg_seq_pos; /* index of next register/value pair */ | |
140 | unsigned int reg_seq_len; /* length of register/value sequence */ | |
141 | ||
142 | struct regval reg_sequence[MAX_REG_SEQ_LEN]; /* register buffer */ | |
143 | uint32_t xfer_buf_in[MAX_ACQ_RECV_LEN32]; /* USB in buffer */ | |
144 | uint16_t xfer_buf_out[MAX_ACQ_SEND_LEN16]; /* USB out buffer */ | |
145 | uint8_t out_packet[PACKET_SIZE]; /* logic payload */ | |
30f34dbd DE |
146 | }; |
147 | ||
be64f90b DE |
148 | static inline void lwla_queue_regval(struct acquisition_state *acq, |
149 | unsigned int reg, uint32_t value) | |
150 | { | |
151 | acq->reg_sequence[acq->reg_seq_len].reg = reg; | |
152 | acq->reg_sequence[acq->reg_seq_len].val = value; | |
153 | acq->reg_seq_len++; | |
154 | } | |
5874e88d | 155 | |
8e2d6c9d DE |
156 | SR_PRIV int lwla_send_bitstream(struct sr_context *ctx, |
157 | const struct sr_usb_dev_inst *usb, | |
158 | const char *name); | |
5874e88d DE |
159 | |
160 | SR_PRIV int lwla_send_command(const struct sr_usb_dev_inst *usb, | |
161 | const uint16_t *command, int cmd_len); | |
162 | ||
163 | SR_PRIV int lwla_receive_reply(const struct sr_usb_dev_inst *usb, | |
e0df15d4 | 164 | uint32_t *reply, int reply_len, int expect_len); |
5874e88d DE |
165 | |
166 | SR_PRIV int lwla_read_reg(const struct sr_usb_dev_inst *usb, | |
167 | uint16_t reg, uint32_t *value); | |
168 | ||
169 | SR_PRIV int lwla_write_reg(const struct sr_usb_dev_inst *usb, | |
170 | uint16_t reg, uint32_t value); | |
171 | ||
172 | SR_PRIV int lwla_write_regs(const struct sr_usb_dev_inst *usb, | |
be64f90b | 173 | const struct regval *regvals, int count); |
5874e88d | 174 | |
db24496a | 175 | #endif |