Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 1 | /* |
| 2 | * usb_e1.c |
| 3 | * |
| 4 | * Copyright (C) 2019-2020 Sylvain Munaut <tnt@246tNt.com> |
Harald Welte | f9280b0 | 2022-11-01 21:58:34 +0100 | [diff] [blame^] | 5 | * Copyright (C) 2022 Harald Welte <laforge@osmocom.org> |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 6 | * SPDX-License-Identifier: GPL-3.0-or-later |
| 7 | */ |
| 8 | |
| 9 | #include <stdint.h> |
| 10 | #include <stdbool.h> |
| 11 | #include <string.h> |
| 12 | |
| 13 | #include <no2usb/usb_hw.h> |
| 14 | #include <no2usb/usb_priv.h> |
| 15 | |
| 16 | #include "console.h" |
| 17 | #include "e1.h" |
| 18 | #include "misc.h" |
| 19 | |
| 20 | struct { |
Harald Welte | f9280b0 | 2022-11-01 21:58:34 +0100 | [diff] [blame^] | 21 | bool running[2]; |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 22 | int in_bdi[2]; |
| 23 | } g_usb_e1; |
| 24 | |
| 25 | |
| 26 | /* Hack */ |
| 27 | unsigned int e1_rx_need_data(int chan, unsigned int usb_addr, unsigned int max_len, unsigned int *pos); |
| 28 | unsigned int e1_rx_level(int chan); |
| 29 | uint8_t e1_get_pending_flags(int chan); |
| 30 | /* ---- */ |
| 31 | |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 32 | |
| 33 | void |
| 34 | usb_e1_run(void) |
| 35 | { |
| 36 | int chan; |
| 37 | int bdi; |
| 38 | |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 39 | /* EP[1-2] IN */ |
| 40 | for (chan=0; chan<2; chan++) |
| 41 | { |
Harald Welte | f9280b0 | 2022-11-01 21:58:34 +0100 | [diff] [blame^] | 42 | if (!g_usb_e1.running[chan]) |
| 43 | continue; |
| 44 | |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 45 | bdi = g_usb_e1.in_bdi[chan]; |
| 46 | |
| 47 | while ((usb_ep_regs[1+chan].in.bd[bdi].csr & USB_BD_STATE_MSK) != USB_BD_STATE_RDY_DATA) |
| 48 | { |
| 49 | uint32_t ptr = usb_ep_regs[1+chan].in.bd[bdi].ptr; |
| 50 | uint32_t hdr; |
| 51 | unsigned int pos; |
| 52 | |
| 53 | /* Error check */ |
| 54 | if ((usb_ep_regs[1+chan].in.bd[bdi].csr & USB_BD_STATE_MSK) == USB_BD_STATE_DONE_ERR) |
| 55 | printf("Err EP%d IN\n", 1+chan); |
| 56 | |
| 57 | /* Get some data from E1 */ |
| 58 | int n = e1_rx_level(chan); |
| 59 | |
| 60 | // if (n > 64) |
| 61 | // n = 12; |
| 62 | // else if (n > 32) |
| 63 | // n = 10; |
| 64 | // else if (n > 8) |
| 65 | // n = 8; |
| 66 | if (n > 12) |
| 67 | n = 12; |
| 68 | else if (!n) |
| 69 | break; |
| 70 | |
| 71 | n = e1_rx_need_data(chan, (ptr >> 2) + 1, n, &pos); |
| 72 | |
| 73 | /* Write header */ |
| 74 | /* [31:12] (reserved) */ |
| 75 | /* [11:10] CRC results (first new multiframe present in packet) */ |
| 76 | /* [ 9: 8] CRC results (second new multiframe present in packet) */ |
| 77 | /* [ 7: 5] Multiframe sequence number (first frame of packet) */ |
| 78 | /* [ 4: 0] Position in multi-frame (first frame of packet) */ |
| 79 | hdr = (pos & 0xff) | (e1_get_pending_flags(chan) << 24); |
| 80 | usb_data_write(ptr, &hdr, 4); |
| 81 | usb_ep_regs[1+chan].in.bd[bdi].csr = USB_BD_STATE_RDY_DATA | USB_BD_LEN((n * 32) + 4); |
| 82 | |
| 83 | /* Next BDI */ |
| 84 | bdi ^= 1; |
| 85 | g_usb_e1.in_bdi[chan] = bdi; |
| 86 | } |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | static const struct usb_intf_desc * |
| 91 | _find_intf(const struct usb_conf_desc *conf, uint8_t idx) |
| 92 | { |
| 93 | const struct usb_intf_desc *intf = NULL; |
| 94 | const void *sod, *eod; |
| 95 | |
| 96 | if (!conf) |
| 97 | return NULL; |
| 98 | |
| 99 | sod = conf; |
| 100 | eod = sod + conf->wTotalLength; |
| 101 | |
| 102 | while (1) { |
| 103 | sod = usb_desc_find(sod, eod, USB_DT_INTF); |
| 104 | if (!sod) |
| 105 | break; |
| 106 | |
| 107 | intf = (void*)sod; |
| 108 | if (intf->bInterfaceNumber == idx) |
| 109 | return intf; |
| 110 | |
| 111 | sod = usb_desc_next(sod); |
| 112 | } |
| 113 | |
| 114 | return NULL; |
| 115 | } |
Harald Welte | f9280b0 | 2022-11-01 21:58:34 +0100 | [diff] [blame^] | 116 | |
| 117 | static const struct usb_conf_desc *last_conf; |
| 118 | |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 119 | enum usb_fnd_resp |
| 120 | _e1_set_conf(const struct usb_conf_desc *conf) |
| 121 | { |
| 122 | const struct usb_intf_desc *intf; |
| 123 | |
| 124 | printf("e1 set_conf %08x\n", conf); |
Harald Welte | f9280b0 | 2022-11-01 21:58:34 +0100 | [diff] [blame^] | 125 | |
| 126 | last_conf = conf; |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 127 | if (!conf) |
| 128 | return USB_FND_SUCCESS; |
| 129 | |
| 130 | intf = _find_intf(conf, 0); |
| 131 | if (!intf) |
| 132 | return USB_FND_ERROR; |
| 133 | |
| 134 | printf("e1 set_conf %08x\n", intf); |
| 135 | |
| 136 | usb_ep_boot(intf, 0x81, true); |
| 137 | usb_ep_boot(intf, 0x82, true); |
| 138 | |
| 139 | return USB_FND_SUCCESS; |
| 140 | } |
| 141 | |
Harald Welte | f9280b0 | 2022-11-01 21:58:34 +0100 | [diff] [blame^] | 142 | static void |
| 143 | disable_chan(int chan) |
| 144 | { |
| 145 | /* Already stopped ? */ |
| 146 | if (!g_usb_e1.running[chan]) |
| 147 | return; |
| 148 | |
| 149 | /* Update state */ |
| 150 | g_usb_e1.running[chan] = false; |
| 151 | |
| 152 | /* Stop E1 */ |
| 153 | e1_stop(chan); |
| 154 | |
| 155 | /* Disable end-points */ |
| 156 | usb_ep_regs[chan+1].in.status = 0; |
| 157 | } |
| 158 | |
| 159 | static void |
| 160 | enable_chan(int chan) |
| 161 | { |
| 162 | /* Already running ? */ |
| 163 | if (g_usb_e1.running[chan]) |
| 164 | return; |
| 165 | |
| 166 | /* Update state */ |
| 167 | g_usb_e1.running[chan] = true; |
| 168 | |
| 169 | /* Reset buffer pointers */ |
| 170 | g_usb_e1.in_bdi[chan] = 0; |
| 171 | |
| 172 | /* Configure EP1 IN / EP2 IN */ |
| 173 | usb_ep_regs[chan+1].in.status = USB_EP_TYPE_ISOC | USB_EP_BD_DUAL; /* Type=Isochronous, dual buffered */ |
| 174 | |
| 175 | /* EP1 IN: Prepare two buffers */ |
| 176 | usb_ep_regs[chan+1].in.bd[0].ptr = 256 + (chan * 2 + 0) * 388; |
| 177 | usb_ep_regs[chan+1].in.bd[0].csr = 0; |
| 178 | |
| 179 | usb_ep_regs[chan+1].in.bd[1].ptr = 256 + (chan * 2 + 1) * 388; |
| 180 | usb_ep_regs[chan+1].in.bd[1].csr = 0; |
| 181 | |
| 182 | /* Start E1 */ |
| 183 | e1_start(chan); |
| 184 | } |
| 185 | |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 186 | enum usb_fnd_resp |
| 187 | _e1_set_intf(const struct usb_intf_desc *base, const struct usb_intf_desc *sel) |
| 188 | { |
Harald Welte | f9280b0 | 2022-11-01 21:58:34 +0100 | [diff] [blame^] | 189 | if (!last_conf || last_conf->bConfigurationValue == 1) { |
| 190 | /* Legacy Configuration */ |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 191 | |
Harald Welte | f9280b0 | 2022-11-01 21:58:34 +0100 | [diff] [blame^] | 192 | if (base->bInterfaceNumber != 0) |
| 193 | return USB_FND_CONTINUE; |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 194 | |
Harald Welte | f9280b0 | 2022-11-01 21:58:34 +0100 | [diff] [blame^] | 195 | if (sel->bAlternateSetting == 0) { |
| 196 | disable_chan(0); |
| 197 | disable_chan(1); |
| 198 | } else if (sel->bAlternateSetting == 1) { |
| 199 | enable_chan(0); |
| 200 | enable_chan(1); |
| 201 | } else { |
| 202 | /* Unknown */ |
| 203 | return USB_FND_ERROR; |
| 204 | } |
| 205 | } else if (last_conf && last_conf->bConfigurationValue == 2) { |
| 206 | /* e1d compatible configuration */ |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 207 | |
Harald Welte | f9280b0 | 2022-11-01 21:58:34 +0100 | [diff] [blame^] | 208 | switch (base->bInterfaceNumber) { |
| 209 | case 0: |
| 210 | case 1: |
| 211 | switch (sel->bAlternateSetting) { |
| 212 | case 0: |
| 213 | disable_chan(base->bInterfaceNumber); |
| 214 | break; |
| 215 | case 1: |
| 216 | enable_chan(base->bInterfaceNumber); |
| 217 | break; |
| 218 | default: |
| 219 | /* Unknown */ |
| 220 | return USB_FND_ERROR; |
| 221 | } |
| 222 | break; |
| 223 | default: |
| 224 | return USB_FND_CONTINUE; |
| 225 | } |
| 226 | } else { |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 227 | return USB_FND_ERROR; |
| 228 | } |
| 229 | |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 230 | return USB_FND_SUCCESS; |
| 231 | } |
| 232 | |
| 233 | enum usb_fnd_resp |
| 234 | _e1_get_intf(const struct usb_intf_desc *base, uint8_t *alt) |
| 235 | { |
Harald Welte | f9280b0 | 2022-11-01 21:58:34 +0100 | [diff] [blame^] | 236 | if (!last_conf || last_conf->bConfigurationValue == 1) { |
| 237 | /* Legacy configuration */ |
| 238 | if (base->bInterfaceNumber != 0) |
| 239 | return USB_FND_CONTINUE; |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 240 | |
Harald Welte | f9280b0 | 2022-11-01 21:58:34 +0100 | [diff] [blame^] | 241 | *alt = g_usb_e1.running[0] && g_usb_e1.running[1] ? 1 : 0; |
| 242 | } else if (last_conf && last_conf->bConfigurationValue == 2) { |
| 243 | /* e1d compatible configuration */ |
| 244 | switch (base->bInterfaceNumber) { |
| 245 | case 0: |
| 246 | case 1: |
| 247 | *alt = g_usb_e1.running[base->bInterfaceNumber] ? 1 : 0; |
| 248 | break; |
| 249 | default: |
| 250 | return USB_FND_CONTINUE; |
| 251 | } |
| 252 | } else |
| 253 | return USB_FND_CONTINUE; |
Sylvain Munaut | f5d7bf2 | 2020-09-14 10:23:50 +0200 | [diff] [blame] | 254 | |
| 255 | return USB_FND_SUCCESS; |
| 256 | } |
| 257 | |
| 258 | static struct usb_fn_drv _e1_drv = { |
| 259 | .set_conf = _e1_set_conf, |
| 260 | .set_intf = _e1_set_intf, |
| 261 | .get_intf = _e1_get_intf, |
| 262 | }; |
| 263 | |
| 264 | void |
| 265 | usb_e1_init(void) |
| 266 | { |
| 267 | /* Clear state */ |
| 268 | memset(&g_usb_e1, 0x00, sizeof(g_usb_e1)); |
| 269 | |
| 270 | /* Install driver */ |
| 271 | usb_register_function_driver(&_e1_drv); |
| 272 | } |