1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * This is the driver for the MGB4 video grabber card by Digiteq Automotive.
4 *
5 * Copyright (C) 2021-2023 Digiteq Automotive
6 * author: Martin Tuma <martin.tuma@digiteqautomotive.com>
7 *
8 * This is the main driver module. The DMA, I2C and SPI sub-drivers are
9 * initialized here and the input/output v4l2 devices are created.
10 *
11 * The mgb4 card uses different expansion modules for different video sources
12 * (GMSL and FPDL3 for now) so in probe() we detect the module type based on
13 * what we see on the I2C bus and check if it matches the FPGA bitstream (there
14 * are different bitstreams for different expansion modules). When no expansion
15 * module is present, we still let the driver initialize to allow flashing of
16 * the FPGA firmware using the SPI FLASH device. No v4l2 video devices are
17 * created in this case.
18 */
19
20 #include <linux/types.h>
21 #include <linux/module.h>
22 #include <linux/pci.h>
23 #include <linux/platform_device.h>
24 #include <linux/clk.h>
25 #include <linux/clk-provider.h>
26 #include <linux/clkdev.h>
27 #include <linux/i2c.h>
28 #include <linux/delay.h>
29 #include <linux/dma/amd_xdma.h>
30 #include <linux/platform_data/amd_xdma.h>
31 #include <linux/spi/xilinx_spi.h>
32 #include <linux/mtd/mtd.h>
33 #include <linux/hwmon.h>
34 #include <linux/debugfs.h>
35 #include "mgb4_dma.h"
36 #include "mgb4_i2c.h"
37 #include "mgb4_sysfs.h"
38 #include "mgb4_vout.h"
39 #include "mgb4_vin.h"
40 #include "mgb4_trigger.h"
41 #include "mgb4_core.h"
42
43 #define MGB4_USER_IRQS 16
44
45 #define DIGITEQ_VID 0x1ed8
46 #define T100_DID 0x0101
47 #define T200_DID 0x0201
48
49 ATTRIBUTE_GROUPS(mgb4_pci);
50
51 static int flashid;
52
53 static struct xdma_chan_info h2c_chan_info = {
54 .dir = DMA_MEM_TO_DEV,
55 };
56
57 static struct xdma_chan_info c2h_chan_info = {
58 .dir = DMA_DEV_TO_MEM,
59 };
60
61 static struct xspi_platform_data spi_platform_data = {
62 .num_chipselect = 1,
63 .bits_per_word = 8
64 };
65
66 static const struct i2c_board_info extender_info = {
67 I2C_BOARD_INFO("extender", 0x21)
68 };
69
70 #if IS_REACHABLE(CONFIG_HWMON)
temp_is_visible(const void * data,enum hwmon_sensor_types type,u32 attr,int channel)71 static umode_t temp_is_visible(const void *data, enum hwmon_sensor_types type,
72 u32 attr, int channel)
73 {
74 if (type == hwmon_temp &&
75 (attr == hwmon_temp_input || attr == hwmon_temp_label))
76 return 0444;
77 else
78 return 0;
79 }
80
temp_read(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long * val)81 static int temp_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
82 int channel, long *val)
83 {
84 struct mgb4_dev *mgbdev = dev_get_drvdata(dev);
85 u32 val10, raw;
86
87 if (type != hwmon_temp || attr != hwmon_temp_input)
88 return -EOPNOTSUPP;
89
90 raw = mgb4_read_reg(&mgbdev->video, 0xD0);
91 /* register value -> Celsius degrees formula given by Xilinx */
92 val10 = ((((raw >> 20) & 0xFFF) * 503975) - 1118822400) / 409600;
93 *val = val10 * 100;
94
95 return 0;
96 }
97
temp_read_string(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,const char ** str)98 static int temp_read_string(struct device *dev, enum hwmon_sensor_types type,
99 u32 attr, int channel, const char **str)
100 {
101 if (type != hwmon_temp || attr != hwmon_temp_label)
102 return -EOPNOTSUPP;
103
104 *str = "FPGA Temperature";
105
106 return 0;
107 }
108
109 static const struct hwmon_ops temp_ops = {
110 .is_visible = temp_is_visible,
111 .read = temp_read,
112 .read_string = temp_read_string
113 };
114
115 static const struct hwmon_channel_info *temp_channel_info[] = {
116 HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_LABEL),
117 NULL
118 };
119
120 static const struct hwmon_chip_info temp_chip_info = {
121 .ops = &temp_ops,
122 .info = temp_channel_info,
123 };
124 #endif
125
match_i2c_adap(struct device * dev,void * data)126 static int match_i2c_adap(struct device *dev, void *data)
127 {
128 return i2c_verify_adapter(dev) ? 1 : 0;
129 }
130
get_i2c_adap(struct platform_device * pdev)131 static struct i2c_adapter *get_i2c_adap(struct platform_device *pdev)
132 {
133 struct device *dev;
134
135 mutex_lock(&pdev->dev.mutex);
136 dev = device_find_child(&pdev->dev, NULL, match_i2c_adap);
137 mutex_unlock(&pdev->dev.mutex);
138
139 return dev ? to_i2c_adapter(dev) : NULL;
140 }
141
match_spi_adap(struct device * dev,void * data)142 static int match_spi_adap(struct device *dev, void *data)
143 {
144 return to_spi_device(dev) ? 1 : 0;
145 }
146
get_spi_adap(struct platform_device * pdev)147 static struct spi_controller *get_spi_adap(struct platform_device *pdev)
148 {
149 struct device *dev;
150
151 mutex_lock(&pdev->dev.mutex);
152 dev = device_find_child(&pdev->dev, NULL, match_spi_adap);
153 mutex_unlock(&pdev->dev.mutex);
154
155 return dev ? container_of(dev, struct spi_controller, dev) : NULL;
156 }
157
init_spi(struct mgb4_dev * mgbdev,u32 devid)158 static int init_spi(struct mgb4_dev *mgbdev, u32 devid)
159 {
160 struct resource spi_resources[] = {
161 {
162 .start = 0x400,
163 .end = 0x47f,
164 .flags = IORESOURCE_MEM,
165 .name = "io-memory",
166 },
167 {
168 .start = 14,
169 .end = 14,
170 .flags = IORESOURCE_IRQ,
171 .name = "irq",
172 },
173 };
174 struct spi_board_info spi_info = {
175 .max_speed_hz = 10000000,
176 .modalias = "m25p80",
177 .chip_select = 0,
178 .mode = SPI_MODE_3,
179 };
180 struct pci_dev *pdev = mgbdev->pdev;
181 struct device *dev = &pdev->dev;
182 struct spi_controller *ctlr;
183 struct spi_device *spi_dev;
184 u32 irq;
185 int rv, id;
186 resource_size_t mapbase = pci_resource_start(pdev, MGB4_MGB4_BAR_ID);
187
188 request_module("platform:xilinx_spi");
189
190 irq = xdma_get_user_irq(mgbdev->xdev, 14);
191 xdma_enable_user_irq(mgbdev->xdev, irq);
192
193 spi_resources[0].parent = &pdev->resource[MGB4_MGB4_BAR_ID];
194 spi_resources[0].start += mapbase;
195 spi_resources[0].end += mapbase;
196 spi_resources[1].start = irq;
197 spi_resources[1].end = irq;
198
199 id = pci_dev_id(pdev);
200 mgbdev->spi_pdev = platform_device_register_resndata(dev, "xilinx_spi",
201 id, spi_resources,
202 ARRAY_SIZE(spi_resources),
203 &spi_platform_data,
204 sizeof(spi_platform_data));
205 if (IS_ERR(mgbdev->spi_pdev)) {
206 dev_err(dev, "failed to register SPI device\n");
207 return PTR_ERR(mgbdev->spi_pdev);
208 }
209
210 ctlr = get_spi_adap(mgbdev->spi_pdev);
211 if (!ctlr) {
212 dev_err(dev, "failed to get SPI adapter\n");
213 rv = -EINVAL;
214 goto err_pdev;
215 }
216
217 snprintf(mgbdev->fw_part_name, sizeof(mgbdev->fw_part_name),
218 "mgb4-fw.%d", flashid);
219 mgbdev->partitions[0].name = mgbdev->fw_part_name;
220 if (devid == T200_DID) {
221 mgbdev->partitions[0].size = 0x950000;
222 mgbdev->partitions[0].offset = 0x1000000;
223 } else {
224 mgbdev->partitions[0].size = 0x400000;
225 mgbdev->partitions[0].offset = 0x400000;
226 }
227 mgbdev->partitions[0].mask_flags = 0;
228
229 snprintf(mgbdev->data_part_name, sizeof(mgbdev->data_part_name),
230 "mgb4-data.%d", flashid);
231 mgbdev->partitions[1].name = mgbdev->data_part_name;
232 mgbdev->partitions[1].size = 0x10000;
233 mgbdev->partitions[1].offset = 0xFF0000;
234 mgbdev->partitions[1].mask_flags = MTD_CAP_NORFLASH;
235
236 snprintf(mgbdev->flash_name, sizeof(mgbdev->flash_name),
237 "mgb4-flash.%d", flashid);
238 mgbdev->flash_data.name = mgbdev->flash_name;
239 mgbdev->flash_data.parts = mgbdev->partitions;
240 mgbdev->flash_data.nr_parts = ARRAY_SIZE(mgbdev->partitions);
241 mgbdev->flash_data.type = "spi-nor";
242
243 spi_info.platform_data = &mgbdev->flash_data;
244
245 spi_dev = spi_new_device(ctlr, &spi_info);
246 put_device(&ctlr->dev);
247 if (!spi_dev) {
248 dev_err(dev, "failed to create MTD device\n");
249 rv = -EINVAL;
250 goto err_pdev;
251 }
252
253 return 0;
254
255 err_pdev:
256 platform_device_unregister(mgbdev->spi_pdev);
257
258 return rv;
259 }
260
free_spi(struct mgb4_dev * mgbdev)261 static void free_spi(struct mgb4_dev *mgbdev)
262 {
263 platform_device_unregister(mgbdev->spi_pdev);
264 }
265
init_i2c(struct mgb4_dev * mgbdev)266 static int init_i2c(struct mgb4_dev *mgbdev)
267 {
268 struct resource i2c_resources[] = {
269 {
270 .start = 0x200,
271 .end = 0x3ff,
272 .flags = IORESOURCE_MEM,
273 .name = "io-memory",
274 },
275 {
276 .start = 15,
277 .end = 15,
278 .flags = IORESOURCE_IRQ,
279 .name = "irq",
280 },
281 };
282 struct pci_dev *pdev = mgbdev->pdev;
283 struct device *dev = &pdev->dev;
284 char clk_name[16];
285 u32 irq;
286 int rv, id;
287 resource_size_t mapbase = pci_resource_start(pdev, MGB4_MGB4_BAR_ID);
288
289 request_module("platform:xiic-i2c");
290
291 irq = xdma_get_user_irq(mgbdev->xdev, 15);
292 xdma_enable_user_irq(mgbdev->xdev, irq);
293
294 i2c_resources[0].parent = &pdev->resource[MGB4_MGB4_BAR_ID];
295 i2c_resources[0].start += mapbase;
296 i2c_resources[0].end += mapbase;
297 i2c_resources[1].start = irq;
298 i2c_resources[1].end = irq;
299
300 id = pci_dev_id(pdev);
301
302 /* create dummy clock required by the xiic-i2c adapter */
303 snprintf(clk_name, sizeof(clk_name), "xiic-i2c.%d", id);
304 mgbdev->i2c_clk = clk_hw_register_fixed_rate(NULL, clk_name, NULL,
305 0, MGB4_HW_FREQ);
306 if (IS_ERR(mgbdev->i2c_clk)) {
307 dev_err(dev, "failed to register I2C clock\n");
308 return PTR_ERR(mgbdev->i2c_clk);
309 }
310 mgbdev->i2c_cl = clkdev_hw_create(mgbdev->i2c_clk, NULL, "xiic-i2c.%d",
311 id);
312 if (!mgbdev->i2c_cl) {
313 dev_err(dev, "failed to register I2C clockdev\n");
314 rv = -ENOMEM;
315 goto err_clk;
316 }
317
318 mgbdev->i2c_pdev = platform_device_register_resndata(dev, "xiic-i2c",
319 id, i2c_resources,
320 ARRAY_SIZE(i2c_resources),
321 NULL, 0);
322 if (IS_ERR(mgbdev->i2c_pdev)) {
323 dev_err(dev, "failed to register I2C device\n");
324 rv = PTR_ERR(mgbdev->i2c_pdev);
325 goto err_clkdev;
326 }
327
328 mgbdev->i2c_adap = get_i2c_adap(mgbdev->i2c_pdev);
329 if (!mgbdev->i2c_adap) {
330 dev_err(dev, "failed to get I2C adapter\n");
331 rv = -EINVAL;
332 goto err_pdev;
333 }
334
335 mutex_init(&mgbdev->i2c_lock);
336
337 return 0;
338
339 err_pdev:
340 platform_device_unregister(mgbdev->i2c_pdev);
341 err_clkdev:
342 clkdev_drop(mgbdev->i2c_cl);
343 err_clk:
344 clk_hw_unregister(mgbdev->i2c_clk);
345
346 return rv;
347 }
348
free_i2c(struct mgb4_dev * mgbdev)349 static void free_i2c(struct mgb4_dev *mgbdev)
350 {
351 put_device(&mgbdev->i2c_adap->dev);
352 platform_device_unregister(mgbdev->i2c_pdev);
353 clkdev_drop(mgbdev->i2c_cl);
354 clk_hw_unregister(mgbdev->i2c_clk);
355 }
356
get_serial_number(struct mgb4_dev * mgbdev)357 static int get_serial_number(struct mgb4_dev *mgbdev)
358 {
359 struct device *dev = &mgbdev->pdev->dev;
360 struct mtd_info *mtd;
361 size_t rs;
362 int rv;
363
364 mgbdev->serial_number = 0;
365
366 mtd = get_mtd_device_nm(mgbdev->data_part_name);
367 if (IS_ERR(mtd)) {
368 dev_warn(dev, "failed to get data MTD device\n");
369 return -ENOENT;
370 }
371 rv = mtd_read(mtd, 0, sizeof(mgbdev->serial_number), &rs,
372 (u_char *)&mgbdev->serial_number);
373 put_mtd_device(mtd);
374 if (rv < 0 || rs != sizeof(mgbdev->serial_number)) {
375 dev_warn(dev, "error reading MTD device\n");
376 return -EIO;
377 }
378
379 return 0;
380 }
381
get_module_version(struct mgb4_dev * mgbdev)382 static int get_module_version(struct mgb4_dev *mgbdev)
383 {
384 struct device *dev = &mgbdev->pdev->dev;
385 struct mgb4_i2c_client extender;
386 s32 version;
387 u32 fw_version;
388 int rv;
389
390 rv = mgb4_i2c_init(&extender, mgbdev->i2c_adap, &extender_info, 8);
391 if (rv < 0) {
392 dev_err(dev, "failed to create extender I2C device\n");
393 return rv;
394 }
395 version = mgb4_i2c_read_byte(&extender, 0x00);
396 mgb4_i2c_free(&extender);
397 if (version < 0) {
398 dev_err(dev, "error reading module version\n");
399 return -EIO;
400 }
401
402 mgbdev->module_version = ~((u32)version) & 0xff;
403 if (!(MGB4_IS_FPDL3(mgbdev) || MGB4_IS_GMSL(mgbdev))) {
404 dev_err(dev, "unknown module type\n");
405 return -EINVAL;
406 }
407 fw_version = mgb4_read_reg(&mgbdev->video, 0xC4);
408 if (fw_version >> 24 != mgbdev->module_version >> 4) {
409 dev_err(dev, "module/firmware type mismatch\n");
410 return -EINVAL;
411 }
412
413 dev_info(dev, "%s module detected\n",
414 MGB4_IS_FPDL3(mgbdev) ? "FPDL3" : "GMSL");
415
416 return 0;
417 }
418
map_regs(struct pci_dev * pdev,struct resource * res,struct mgb4_regs * regs)419 static int map_regs(struct pci_dev *pdev, struct resource *res,
420 struct mgb4_regs *regs)
421 {
422 int rv;
423 resource_size_t mapbase = pci_resource_start(pdev, MGB4_MGB4_BAR_ID);
424
425 res->start += mapbase;
426 res->end += mapbase;
427
428 rv = mgb4_regs_map(res, regs);
429 if (rv < 0) {
430 dev_err(&pdev->dev, "failed to map %s registers\n", res->name);
431 return rv;
432 }
433
434 return 0;
435 }
436
init_xdma(struct mgb4_dev * mgbdev)437 static int init_xdma(struct mgb4_dev *mgbdev)
438 {
439 struct xdma_platdata data;
440 struct resource res[2] = { 0 };
441 struct dma_slave_map *map;
442 struct pci_dev *pdev = mgbdev->pdev;
443 struct device *dev = &pdev->dev;
444 int i;
445
446 res[0].start = pci_resource_start(pdev, MGB4_XDMA_BAR_ID);
447 res[0].end = pci_resource_end(pdev, MGB4_XDMA_BAR_ID);
448 res[0].flags = IORESOURCE_MEM;
449 res[0].parent = &pdev->resource[MGB4_XDMA_BAR_ID];
450 res[1].start = pci_irq_vector(pdev, 0);
451 res[1].end = res[1].start + MGB4_VIN_DEVICES + MGB4_VOUT_DEVICES
452 + MGB4_USER_IRQS - 1;
453 res[1].flags = IORESOURCE_IRQ;
454
455 data.max_dma_channels = MGB4_VIN_DEVICES + MGB4_VOUT_DEVICES;
456 data.device_map = mgbdev->slave_map;
457 data.device_map_cnt = MGB4_VIN_DEVICES + MGB4_VOUT_DEVICES;
458
459 for (i = 0; i < MGB4_VIN_DEVICES; i++) {
460 sprintf(mgbdev->channel_names[i], "c2h%d", i);
461 map = &data.device_map[i];
462 map->slave = mgbdev->channel_names[i];
463 map->devname = dev_name(dev);
464 map->param = XDMA_FILTER_PARAM(&c2h_chan_info);
465 }
466 for (i = 0; i < MGB4_VOUT_DEVICES; i++) {
467 sprintf(mgbdev->channel_names[i + MGB4_VIN_DEVICES], "h2c%d", i);
468 map = &data.device_map[i + MGB4_VIN_DEVICES];
469 map->slave = mgbdev->channel_names[i + MGB4_VIN_DEVICES];
470 map->devname = dev_name(dev);
471 map->param = XDMA_FILTER_PARAM(&h2c_chan_info);
472 }
473
474 mgbdev->xdev = platform_device_register_resndata(dev, "xdma",
475 PLATFORM_DEVID_AUTO, res,
476 2, &data, sizeof(data));
477 if (IS_ERR(mgbdev->xdev)) {
478 dev_err(dev, "failed to register XDMA device\n");
479 return PTR_ERR(mgbdev->xdev);
480 }
481
482 return 0;
483 }
484
free_xdma(struct mgb4_dev * mgbdev)485 static void free_xdma(struct mgb4_dev *mgbdev)
486 {
487 platform_device_unregister(mgbdev->xdev);
488 }
489
mgb4_probe(struct pci_dev * pdev,const struct pci_device_id * id)490 static int mgb4_probe(struct pci_dev *pdev, const struct pci_device_id *id)
491 {
492 int i, rv;
493 struct mgb4_dev *mgbdev;
494 struct resource video = {
495 .start = 0x0,
496 .end = 0xff,
497 .flags = IORESOURCE_MEM,
498 .name = "mgb4-video",
499 };
500 struct resource cmt = {
501 .start = 0x1000,
502 .end = 0x17ff,
503 .flags = IORESOURCE_MEM,
504 .name = "mgb4-cmt",
505 };
506 int irqs = pci_msix_vec_count(pdev);
507
508 mgbdev = kzalloc(sizeof(*mgbdev), GFP_KERNEL);
509 if (!mgbdev)
510 return -ENOMEM;
511
512 mgbdev->pdev = pdev;
513 pci_set_drvdata(pdev, mgbdev);
514
515 /* PCIe related stuff */
516 rv = pci_enable_device(pdev);
517 if (rv) {
518 dev_err(&pdev->dev, "error enabling PCI device\n");
519 goto err_mgbdev;
520 }
521
522 rv = pcie_capability_set_word(pdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_RELAX_EN);
523 if (rv)
524 dev_warn(&pdev->dev, "error enabling PCIe relaxed ordering\n");
525 rv = pcie_capability_set_word(pdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_EXT_TAG);
526 if (rv)
527 dev_warn(&pdev->dev, "error enabling PCIe extended tag field\n");
528 rv = pcie_set_readrq(pdev, 512);
529 if (rv)
530 dev_warn(&pdev->dev, "error setting PCIe max. memory read size\n");
531 pci_set_master(pdev);
532
533 rv = pci_alloc_irq_vectors(pdev, irqs, irqs, PCI_IRQ_MSIX);
534 if (rv < 0) {
535 dev_err(&pdev->dev, "error allocating MSI-X IRQs\n");
536 goto err_enable_pci;
537 }
538
539 rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
540 if (rv) {
541 dev_err(&pdev->dev, "error setting DMA mask\n");
542 goto err_enable_pci;
543 }
544
545 /* DMA + IRQ engine */
546 rv = init_xdma(mgbdev);
547 if (rv)
548 goto err_alloc_irq;
549 rv = mgb4_dma_channel_init(mgbdev);
550 if (rv)
551 goto err_dma_chan;
552
553 /* mgb4 video registers */
554 rv = map_regs(pdev, &video, &mgbdev->video);
555 if (rv < 0)
556 goto err_dma_chan;
557 /* mgb4 cmt registers */
558 rv = map_regs(pdev, &cmt, &mgbdev->cmt);
559 if (rv < 0)
560 goto err_video_regs;
561
562 /* SPI FLASH */
563 rv = init_spi(mgbdev, id->device);
564 if (rv < 0)
565 goto err_cmt_regs;
566
567 /* I2C controller */
568 rv = init_i2c(mgbdev);
569 if (rv < 0)
570 goto err_spi;
571
572 /* PCI card related sysfs attributes */
573 rv = device_add_groups(&pdev->dev, mgb4_pci_groups);
574 if (rv < 0)
575 goto err_i2c;
576
577 #if IS_REACHABLE(CONFIG_HWMON)
578 /* HWmon (card temperature) */
579 mgbdev->hwmon_dev = hwmon_device_register_with_info(&pdev->dev, "mgb4",
580 mgbdev,
581 &temp_chip_info,
582 NULL);
583 #endif
584
585 #ifdef CONFIG_DEBUG_FS
586 mgbdev->debugfs = debugfs_create_dir(dev_name(&pdev->dev), NULL);
587 #endif
588
589 /* Get card serial number. On systems without MTD flash support we may
590 * get an error thus ignore the return value. An invalid serial number
591 * should not break anything...
592 */
593 if (get_serial_number(mgbdev) < 0)
594 dev_warn(&pdev->dev, "error reading card serial number\n");
595
596 /* Get module type. If no valid module is found, skip the video device
597 * creation part but do not exit with error to allow flashing the card.
598 */
599 rv = get_module_version(mgbdev);
600 if (rv < 0)
601 goto exit;
602
603 /* Video input v4l2 devices */
604 for (i = 0; i < MGB4_VIN_DEVICES; i++)
605 mgbdev->vin[i] = mgb4_vin_create(mgbdev, i);
606
607 /* Video output v4l2 devices */
608 for (i = 0; i < MGB4_VOUT_DEVICES; i++)
609 mgbdev->vout[i] = mgb4_vout_create(mgbdev, i);
610
611 /* Triggers */
612 mgbdev->indio_dev = mgb4_trigger_create(mgbdev);
613
614 exit:
615 flashid++;
616
617 return 0;
618
619 err_i2c:
620 free_i2c(mgbdev);
621 err_spi:
622 free_spi(mgbdev);
623 err_cmt_regs:
624 mgb4_regs_free(&mgbdev->cmt);
625 err_video_regs:
626 mgb4_regs_free(&mgbdev->video);
627 err_dma_chan:
628 mgb4_dma_channel_free(mgbdev);
629 free_xdma(mgbdev);
630 err_alloc_irq:
631 pci_disable_msix(pdev);
632 err_enable_pci:
633 pci_disable_device(pdev);
634 err_mgbdev:
635 kfree(mgbdev);
636
637 return rv;
638 }
639
mgb4_remove(struct pci_dev * pdev)640 static void mgb4_remove(struct pci_dev *pdev)
641 {
642 struct mgb4_dev *mgbdev = pci_get_drvdata(pdev);
643 int i;
644
645 #if IS_REACHABLE(CONFIG_HWMON)
646 hwmon_device_unregister(mgbdev->hwmon_dev);
647 #endif
648
649 if (mgbdev->indio_dev)
650 mgb4_trigger_free(mgbdev->indio_dev);
651
652 for (i = 0; i < MGB4_VOUT_DEVICES; i++)
653 if (mgbdev->vout[i])
654 mgb4_vout_free(mgbdev->vout[i]);
655 for (i = 0; i < MGB4_VIN_DEVICES; i++)
656 if (mgbdev->vin[i])
657 mgb4_vin_free(mgbdev->vin[i]);
658
659 #ifdef CONFIG_DEBUG_FS
660 debugfs_remove_recursive(mgbdev->debugfs);
661 #endif
662
663 device_remove_groups(&mgbdev->pdev->dev, mgb4_pci_groups);
664 free_spi(mgbdev);
665 free_i2c(mgbdev);
666 mgb4_regs_free(&mgbdev->video);
667 mgb4_regs_free(&mgbdev->cmt);
668
669 mgb4_dma_channel_free(mgbdev);
670 free_xdma(mgbdev);
671
672 pci_disable_msix(mgbdev->pdev);
673 pci_disable_device(mgbdev->pdev);
674
675 kfree(mgbdev);
676 }
677
678 static const struct pci_device_id mgb4_pci_ids[] = {
679 { PCI_DEVICE(DIGITEQ_VID, T100_DID), },
680 { PCI_DEVICE(DIGITEQ_VID, T200_DID), },
681 { 0, }
682 };
683 MODULE_DEVICE_TABLE(pci, mgb4_pci_ids);
684
685 static struct pci_driver mgb4_pci_driver = {
686 .name = KBUILD_MODNAME,
687 .id_table = mgb4_pci_ids,
688 .probe = mgb4_probe,
689 .remove = mgb4_remove,
690 };
691
692 module_pci_driver(mgb4_pci_driver);
693
694 MODULE_AUTHOR("Digiteq Automotive s.r.o.");
695 MODULE_DESCRIPTION("Digiteq Automotive MGB4 Driver");
696 MODULE_LICENSE("GPL");
697 MODULE_SOFTDEP("pre: platform:xiic-i2c platform:xilinx_spi spi-nor");
698