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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III4 * flexcop-usb.c - covers the USB part5 * see flexcop.c for copyright information6 */7#define FC_LOG_PREFIX "flexcop_usb"8#include "flexcop-usb.h"9#include "flexcop-common.h"10 11/* Version information */12#define DRIVER_VERSION "0.1"13#define DRIVER_NAME "Technisat/B2C2 FlexCop II/IIb/III Digital TV USB Driver"14#define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@posteo.de>"15 16/* debug */17#ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG18#define dprintk(level, args...) \19 do { if ((debug & (level))) printk(args); } while (0)20 21#define debug_dump(b, l, method) do {\22 int i; \23 for (i = 0; i < l; i++) \24 method("%02x ", b[i]); \25 method("\n"); \26} while (0)27 28#define DEBSTATUS ""29#else30#define dprintk(level, args...) no_printk(args)31#define debug_dump(b, l, method) do { } while (0)32#define DEBSTATUS " (debugging is not enabled)"33#endif34 35static int debug;36module_param(debug, int, 0644);37MODULE_PARM_DESC(debug, "set debugging level (1=info,ts=2,ctrl=4,i2c=8,v8mem=16 (or-able))." DEBSTATUS);38#undef DEBSTATUS39 40#define deb_info(args...) dprintk(0x01, args)41#define deb_ts(args...) dprintk(0x02, args)42#define deb_ctrl(args...) dprintk(0x04, args)43#define deb_i2c(args...) dprintk(0x08, args)44#define deb_v8(args...) dprintk(0x10, args)45 46/* JLP 111700: we will include the 1 bit gap between the upper and lower 3 bits47 * in the IBI address, to make the V8 code simpler.48 * PCI ADDRESS FORMAT: 0x71C -> 0000 0111 0001 1100 (the six bits used)49 * in general: 0000 0HHH 000L LL0050 * IBI ADDRESS FORMAT: RHHH BLLL51 *52 * where R is the read(1)/write(0) bit, B is the busy bit53 * and HHH and LLL are the two sets of three bits from the PCI address.54 */55#define B2C2_FLEX_PCIOFFSET_TO_INTERNALADDR(usPCI) (u8) \56 (((usPCI >> 2) & 0x07) + ((usPCI >> 4) & 0x70))57#define B2C2_FLEX_INTERNALADDR_TO_PCIOFFSET(ucAddr) (u16) \58 (((ucAddr & 0x07) << 2) + ((ucAddr & 0x70) << 4))59 60/*61 * DKT 02022862 * - forget about this VENDOR_BUFFER_SIZE, read and write register63 * deal with DWORD or 4 bytes, that should be should from now on64 * - from now on, we don't support anything older than firm 1.0065 * I eliminated the write register as a 2 trip of writing hi word and lo word66 * and force this to write only 4 bytes at a time.67 * NOTE: this should work with all the firmware from 1.00 and newer68 */69static int flexcop_usb_readwrite_dw(struct flexcop_device *fc, u16 wRegOffsPCI, u32 *val, u8 read)70{71 struct flexcop_usb *fc_usb = fc->bus_specific;72 u8 request = read ? B2C2_USB_READ_REG : B2C2_USB_WRITE_REG;73 u8 request_type = (read ? USB_DIR_IN : USB_DIR_OUT) | USB_TYPE_VENDOR;74 u8 wAddress = B2C2_FLEX_PCIOFFSET_TO_INTERNALADDR(wRegOffsPCI) |75 (read ? 0x80 : 0);76 int ret;77 78 mutex_lock(&fc_usb->data_mutex);79 if (!read)80 memcpy(fc_usb->data, val, sizeof(*val));81 82 ret = usb_control_msg(fc_usb->udev,83 read ? B2C2_USB_CTRL_PIPE_IN : B2C2_USB_CTRL_PIPE_OUT,84 request,85 request_type, /* 0xc0 read or 0x40 write */86 wAddress,87 0,88 fc_usb->data,89 sizeof(u32),90 B2C2_WAIT_FOR_OPERATION_RDW);91 92 if (ret != sizeof(u32)) {93 err("error while %s dword from %d (%d).", read ? "reading" :94 "writing", wAddress, wRegOffsPCI);95 if (ret >= 0)96 ret = -EIO;97 }98 99 if (read && ret >= 0)100 memcpy(val, fc_usb->data, sizeof(*val));101 mutex_unlock(&fc_usb->data_mutex);102 103 return ret;104}105/*106 * DKT 010817 - add support for V8 memory read/write and flash update107 */108static int flexcop_usb_v8_memory_req(struct flexcop_usb *fc_usb,109 flexcop_usb_request_t req, u8 page, u16 wAddress,110 u8 *pbBuffer, u32 buflen)111{112 u8 request_type = USB_TYPE_VENDOR;113 u16 wIndex;114 int nWaitTime, pipe, ret;115 wIndex = page << 8;116 117 if (buflen > sizeof(fc_usb->data)) {118 err("Buffer size bigger than max URB control message\n");119 return -EIO;120 }121 122 switch (req) {123 case B2C2_USB_READ_V8_MEM:124 nWaitTime = B2C2_WAIT_FOR_OPERATION_V8READ;125 request_type |= USB_DIR_IN;126 pipe = B2C2_USB_CTRL_PIPE_IN;127 break;128 case B2C2_USB_WRITE_V8_MEM:129 wIndex |= pbBuffer[0];130 request_type |= USB_DIR_OUT;131 nWaitTime = B2C2_WAIT_FOR_OPERATION_V8WRITE;132 pipe = B2C2_USB_CTRL_PIPE_OUT;133 break;134 case B2C2_USB_FLASH_BLOCK:135 request_type |= USB_DIR_OUT;136 nWaitTime = B2C2_WAIT_FOR_OPERATION_V8FLASH;137 pipe = B2C2_USB_CTRL_PIPE_OUT;138 break;139 default:140 deb_info("unsupported request for v8_mem_req %x.\n", req);141 return -EINVAL;142 }143 deb_v8("v8mem: %02x %02x %04x %04x, len: %d\n", request_type, req,144 wAddress, wIndex, buflen);145 146 mutex_lock(&fc_usb->data_mutex);147 148 if ((request_type & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT)149 memcpy(fc_usb->data, pbBuffer, buflen);150 151 ret = usb_control_msg(fc_usb->udev, pipe,152 req,153 request_type,154 wAddress,155 wIndex,156 fc_usb->data,157 buflen,158 nWaitTime);159 if (ret != buflen)160 ret = -EIO;161 162 if (ret >= 0) {163 ret = 0;164 if ((request_type & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)165 memcpy(pbBuffer, fc_usb->data, buflen);166 }167 168 mutex_unlock(&fc_usb->data_mutex);169 170 debug_dump(pbBuffer, ret, deb_v8);171 return ret;172}173 174#define bytes_left_to_read_on_page(paddr, buflen) \175 ((V8_MEMORY_PAGE_SIZE - (paddr & V8_MEMORY_PAGE_MASK)) > buflen \176 ? buflen : (V8_MEMORY_PAGE_SIZE - (paddr & V8_MEMORY_PAGE_MASK)))177 178static int flexcop_usb_memory_req(struct flexcop_usb *fc_usb,179 flexcop_usb_request_t req, flexcop_usb_mem_page_t page_start,180 u32 addr, int extended, u8 *buf, u32 len)181{182 int ret = 0;183 u16 wMax;184 u32 pagechunk = 0;185 186 switch (req) {187 case B2C2_USB_READ_V8_MEM:188 wMax = USB_MEM_READ_MAX;189 break;190 case B2C2_USB_WRITE_V8_MEM:191 wMax = USB_MEM_WRITE_MAX;192 break;193 case B2C2_USB_FLASH_BLOCK:194 wMax = USB_FLASH_MAX;195 break;196 default:197 return -EINVAL;198 }199 while (len) {200 pagechunk = min(wMax, bytes_left_to_read_on_page(addr, len));201 deb_info("%x\n",202 (addr & V8_MEMORY_PAGE_MASK) |203 (V8_MEMORY_EXTENDED*extended));204 205 ret = flexcop_usb_v8_memory_req(fc_usb, req,206 page_start + (addr / V8_MEMORY_PAGE_SIZE),207 (addr & V8_MEMORY_PAGE_MASK) |208 (V8_MEMORY_EXTENDED*extended),209 buf, pagechunk);210 211 if (ret < 0)212 return ret;213 addr += pagechunk;214 buf += pagechunk;215 len -= pagechunk;216 }217 return 0;218}219 220static int flexcop_usb_get_mac_addr(struct flexcop_device *fc, int extended)221{222 return flexcop_usb_memory_req(fc->bus_specific, B2C2_USB_READ_V8_MEM,223 V8_MEMORY_PAGE_FLASH, 0x1f010, 1,224 fc->dvb_adapter.proposed_mac, 6);225}226 227/* usb i2c stuff */228static int flexcop_usb_i2c_req(struct flexcop_i2c_adapter *i2c,229 flexcop_usb_request_t req, flexcop_usb_i2c_function_t func,230 u8 chipaddr, u8 addr, u8 *buf, u8 buflen)231{232 struct flexcop_usb *fc_usb = i2c->fc->bus_specific;233 u16 wValue, wIndex;234 int nWaitTime, pipe, ret;235 u8 request_type = USB_TYPE_VENDOR;236 237 if (buflen > sizeof(fc_usb->data)) {238 err("Buffer size bigger than max URB control message\n");239 return -EIO;240 }241 242 switch (func) {243 case USB_FUNC_I2C_WRITE:244 case USB_FUNC_I2C_MULTIWRITE:245 case USB_FUNC_I2C_REPEATWRITE:246 /* DKT 020208 - add this to support special case of DiSEqC */247 case USB_FUNC_I2C_CHECKWRITE:248 pipe = B2C2_USB_CTRL_PIPE_OUT;249 nWaitTime = 2000;250 request_type |= USB_DIR_OUT;251 break;252 case USB_FUNC_I2C_READ:253 case USB_FUNC_I2C_REPEATREAD:254 pipe = B2C2_USB_CTRL_PIPE_IN;255 nWaitTime = 2000;256 request_type |= USB_DIR_IN;257 break;258 default:259 deb_info("unsupported function for i2c_req %x\n", func);260 return -EINVAL;261 }262 wValue = (func << 8) | (i2c->port << 4);263 wIndex = (chipaddr << 8 ) | addr;264 265 deb_i2c("i2c %2d: %02x %02x %02x %02x %02x %02x\n",266 func, request_type, req,267 wValue & 0xff, wValue >> 8,268 wIndex & 0xff, wIndex >> 8);269 270 mutex_lock(&fc_usb->data_mutex);271 272 if ((request_type & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT)273 memcpy(fc_usb->data, buf, buflen);274 275 ret = usb_control_msg(fc_usb->udev, pipe,276 req,277 request_type,278 wValue,279 wIndex,280 fc_usb->data,281 buflen,282 nWaitTime);283 284 if (ret != buflen)285 ret = -EIO;286 287 if (ret >= 0) {288 ret = 0;289 if ((request_type & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)290 memcpy(buf, fc_usb->data, buflen);291 }292 293 mutex_unlock(&fc_usb->data_mutex);294 295 return ret;296}297 298/* actual bus specific access functions,299 make sure prototype are/will be equal to pci */300static flexcop_ibi_value flexcop_usb_read_ibi_reg(struct flexcop_device *fc,301 flexcop_ibi_register reg)302{303 flexcop_ibi_value val;304 val.raw = 0;305 flexcop_usb_readwrite_dw(fc, reg, &val.raw, 1);306 return val;307}308 309static int flexcop_usb_write_ibi_reg(struct flexcop_device *fc,310 flexcop_ibi_register reg, flexcop_ibi_value val)311{312 return flexcop_usb_readwrite_dw(fc, reg, &val.raw, 0);313}314 315static int flexcop_usb_i2c_request(struct flexcop_i2c_adapter *i2c,316 flexcop_access_op_t op, u8 chipaddr, u8 addr, u8 *buf, u16 len)317{318 if (op == FC_READ)319 return flexcop_usb_i2c_req(i2c, B2C2_USB_I2C_REQUEST,320 USB_FUNC_I2C_READ, chipaddr, addr, buf, len);321 else322 return flexcop_usb_i2c_req(i2c, B2C2_USB_I2C_REQUEST,323 USB_FUNC_I2C_WRITE, chipaddr, addr, buf, len);324}325 326static void flexcop_usb_process_frame(struct flexcop_usb *fc_usb,327 u8 *buffer, int buffer_length)328{329 u8 *b;330 int l;331 332 deb_ts("tmp_buffer_length=%d, buffer_length=%d\n",333 fc_usb->tmp_buffer_length, buffer_length);334 335 if (fc_usb->tmp_buffer_length > 0) {336 memcpy(fc_usb->tmp_buffer+fc_usb->tmp_buffer_length, buffer,337 buffer_length);338 fc_usb->tmp_buffer_length += buffer_length;339 b = fc_usb->tmp_buffer;340 l = fc_usb->tmp_buffer_length;341 } else {342 b = buffer;343 l = buffer_length;344 }345 346 while (l >= 190) {347 if (*b == 0xff) {348 switch (*(b+1) & 0x03) {349 case 0x01: /* media packet */350 if (*(b+2) == 0x47)351 flexcop_pass_dmx_packets(352 fc_usb->fc_dev, b+2, 1);353 else354 deb_ts("not ts packet %*ph\n", 4, b+2);355 b += 190;356 l -= 190;357 break;358 default:359 deb_ts("wrong packet type\n");360 l = 0;361 break;362 }363 } else {364 deb_ts("wrong header\n");365 l = 0;366 }367 }368 369 if (l > 0)370 memcpy(fc_usb->tmp_buffer, b, l);371 fc_usb->tmp_buffer_length = l;372}373 374static void flexcop_usb_urb_complete(struct urb *urb)375{376 struct flexcop_usb *fc_usb = urb->context;377 int i;378 379 if (urb->actual_length > 0)380 deb_ts("urb completed, bufsize: %d actlen; %d\n",381 urb->transfer_buffer_length, urb->actual_length);382 383 for (i = 0; i < urb->number_of_packets; i++) {384 if (urb->iso_frame_desc[i].status < 0) {385 err("iso frame descriptor %d has an error: %d\n", i,386 urb->iso_frame_desc[i].status);387 } else388 if (urb->iso_frame_desc[i].actual_length > 0) {389 deb_ts("passed %d bytes to the demux\n",390 urb->iso_frame_desc[i].actual_length);391 392 flexcop_usb_process_frame(fc_usb,393 urb->transfer_buffer +394 urb->iso_frame_desc[i].offset,395 urb->iso_frame_desc[i].actual_length);396 }397 urb->iso_frame_desc[i].status = 0;398 urb->iso_frame_desc[i].actual_length = 0;399 }400 usb_submit_urb(urb, GFP_ATOMIC);401}402 403static int flexcop_usb_stream_control(struct flexcop_device *fc, int onoff)404{405 /* submit/kill iso packets */406 return 0;407}408 409static void flexcop_usb_transfer_exit(struct flexcop_usb *fc_usb)410{411 int i;412 for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++)413 if (fc_usb->iso_urb[i] != NULL) {414 deb_ts("unlinking/killing urb no. %d\n", i);415 usb_kill_urb(fc_usb->iso_urb[i]);416 usb_free_urb(fc_usb->iso_urb[i]);417 }418 419 usb_free_coherent(fc_usb->udev, fc_usb->buffer_size,420 fc_usb->iso_buffer, fc_usb->dma_addr);421 422}423 424static int flexcop_usb_transfer_init(struct flexcop_usb *fc_usb)425{426 struct usb_host_interface *alt = fc_usb->uintf->cur_altsetting;427 u16 frame_size;428 int bufsize, i, j, ret;429 int buffer_offset = 0;430 431 frame_size = usb_endpoint_maxp(&alt->endpoint[0].desc);432 bufsize = B2C2_USB_NUM_ISO_URB * B2C2_USB_FRAMES_PER_ISO * frame_size;433 434 deb_ts("creating %d iso-urbs with %d frames each of %d bytes size = %d.\n",435 B2C2_USB_NUM_ISO_URB,436 B2C2_USB_FRAMES_PER_ISO, frame_size, bufsize);437 438 fc_usb->iso_buffer = usb_alloc_coherent(fc_usb->udev,439 bufsize, GFP_KERNEL, &fc_usb->dma_addr);440 if (fc_usb->iso_buffer == NULL)441 return -ENOMEM;442 443 memset(fc_usb->iso_buffer, 0, bufsize);444 fc_usb->buffer_size = bufsize;445 446 /* creating iso urbs */447 for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++) {448 fc_usb->iso_urb[i] = usb_alloc_urb(B2C2_USB_FRAMES_PER_ISO,449 GFP_KERNEL);450 if (fc_usb->iso_urb[i] == NULL) {451 ret = -ENOMEM;452 goto urb_error;453 }454 }455 456 /* initialising and submitting iso urbs */457 for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++) {458 int frame_offset = 0;459 struct urb *urb = fc_usb->iso_urb[i];460 deb_ts("initializing and submitting urb no. %d (buf_offset: %d).\n",461 i, buffer_offset);462 463 urb->dev = fc_usb->udev;464 urb->context = fc_usb;465 urb->complete = flexcop_usb_urb_complete;466 urb->pipe = B2C2_USB_DATA_PIPE;467 urb->transfer_flags = URB_ISO_ASAP;468 urb->interval = 1;469 urb->number_of_packets = B2C2_USB_FRAMES_PER_ISO;470 urb->transfer_buffer_length = frame_size * B2C2_USB_FRAMES_PER_ISO;471 urb->transfer_buffer = fc_usb->iso_buffer + buffer_offset;472 473 buffer_offset += frame_size * B2C2_USB_FRAMES_PER_ISO;474 for (j = 0; j < B2C2_USB_FRAMES_PER_ISO; j++) {475 deb_ts("urb no: %d, frame: %d, frame_offset: %d\n",476 i, j, frame_offset);477 urb->iso_frame_desc[j].offset = frame_offset;478 urb->iso_frame_desc[j].length = frame_size;479 frame_offset += frame_size;480 }481 482 if ((ret = usb_submit_urb(fc_usb->iso_urb[i],GFP_KERNEL))) {483 err("submitting urb %d failed with %d.", i, ret);484 goto urb_error;485 }486 deb_ts("submitted urb no. %d.\n", i);487 }488 489 /* SRAM */490 flexcop_sram_set_dest(fc_usb->fc_dev, FC_SRAM_DEST_MEDIA |491 FC_SRAM_DEST_NET | FC_SRAM_DEST_CAO | FC_SRAM_DEST_CAI,492 FC_SRAM_DEST_TARGET_WAN_USB);493 flexcop_wan_set_speed(fc_usb->fc_dev, FC_WAN_SPEED_8MBITS);494 flexcop_sram_ctrl(fc_usb->fc_dev, 1, 1, 1);495 return 0;496 497urb_error:498 flexcop_usb_transfer_exit(fc_usb);499 return ret;500}501 502static int flexcop_usb_init(struct flexcop_usb *fc_usb)503{504 struct usb_host_interface *alt;505 int ret;506 507 /* use the alternate setting with the largest buffer */508 ret = usb_set_interface(fc_usb->udev, 0, 1);509 if (ret) {510 err("set interface failed.");511 return ret;512 }513 514 alt = fc_usb->uintf->cur_altsetting;515 516 if (alt->desc.bNumEndpoints < 2)517 return -ENODEV;518 if (!usb_endpoint_is_isoc_in(&alt->endpoint[0].desc))519 return -ENODEV;520 521 switch (fc_usb->udev->speed) {522 case USB_SPEED_LOW:523 err("cannot handle USB speed because it is too slow.");524 return -ENODEV;525 break;526 case USB_SPEED_FULL:527 info("running at FULL speed.");528 break;529 case USB_SPEED_HIGH:530 info("running at HIGH speed.");531 break;532 case USB_SPEED_SUPER:533 info("running at SUPER speed.");534 break;535 case USB_SPEED_SUPER_PLUS:536 info("running at SUPER+ speed.");537 break;538 case USB_SPEED_UNKNOWN:539 default:540 err("cannot handle USB speed because it is unknown.");541 return -ENODEV;542 }543 usb_set_intfdata(fc_usb->uintf, fc_usb);544 return 0;545}546 547static void flexcop_usb_exit(struct flexcop_usb *fc_usb)548{549 usb_set_intfdata(fc_usb->uintf, NULL);550}551 552static int flexcop_usb_probe(struct usb_interface *intf,553 const struct usb_device_id *id)554{555 struct usb_device *udev = interface_to_usbdev(intf);556 struct flexcop_usb *fc_usb = NULL;557 struct flexcop_device *fc = NULL;558 int ret;559 560 if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_usb))) == NULL) {561 err("out of memory\n");562 return -ENOMEM;563 }564 565 /* general flexcop init */566 fc_usb = fc->bus_specific;567 fc_usb->fc_dev = fc;568 mutex_init(&fc_usb->data_mutex);569 570 fc->read_ibi_reg = flexcop_usb_read_ibi_reg;571 fc->write_ibi_reg = flexcop_usb_write_ibi_reg;572 fc->i2c_request = flexcop_usb_i2c_request;573 fc->get_mac_addr = flexcop_usb_get_mac_addr;574 575 fc->stream_control = flexcop_usb_stream_control;576 577 fc->pid_filtering = 1;578 fc->bus_type = FC_USB;579 580 fc->dev = &udev->dev;581 fc->owner = THIS_MODULE;582 583 /* bus specific part */584 fc_usb->udev = udev;585 fc_usb->uintf = intf;586 if ((ret = flexcop_usb_init(fc_usb)) != 0)587 goto err_kfree;588 589 /* init flexcop */590 if ((ret = flexcop_device_initialize(fc)) != 0)591 goto err_usb_exit;592 593 /* xfer init */594 if ((ret = flexcop_usb_transfer_init(fc_usb)) != 0)595 goto err_fc_exit;596 597 info("%s successfully initialized and connected.", DRIVER_NAME);598 return 0;599 600err_fc_exit:601 flexcop_device_exit(fc);602err_usb_exit:603 flexcop_usb_exit(fc_usb);604err_kfree:605 flexcop_device_kfree(fc);606 return ret;607}608 609static void flexcop_usb_disconnect(struct usb_interface *intf)610{611 struct flexcop_usb *fc_usb = usb_get_intfdata(intf);612 flexcop_usb_transfer_exit(fc_usb);613 flexcop_device_exit(fc_usb->fc_dev);614 flexcop_usb_exit(fc_usb);615 flexcop_device_kfree(fc_usb->fc_dev);616 info("%s successfully deinitialized and disconnected.", DRIVER_NAME);617}618 619static const struct usb_device_id flexcop_usb_table[] = {620 { USB_DEVICE(0x0af7, 0x0101) },621 { }622};623MODULE_DEVICE_TABLE (usb, flexcop_usb_table);624 625/* usb specific object needed to register this driver with the usb subsystem */626static struct usb_driver flexcop_usb_driver = {627 .name = "b2c2_flexcop_usb",628 .probe = flexcop_usb_probe,629 .disconnect = flexcop_usb_disconnect,630 .id_table = flexcop_usb_table,631};632 633module_usb_driver(flexcop_usb_driver);634 635MODULE_AUTHOR(DRIVER_AUTHOR);636MODULE_DESCRIPTION(DRIVER_NAME);637MODULE_LICENSE("GPL");638