Lines Matching +full:coexist +full:- +full:gpio +full:- +full:pin
1 // SPDX-License-Identifier: GPL-2.0-or-later
9 #include <linux/clk/clk-conf.h>
13 #include <linux/dma-mapping.h>
15 #include <linux/gpio/consumer.h>
35 #include <linux/spi/spi-mem.h>
51 spi_controller_put(spi->controller); in spidev_release()
52 kfree(spi->driver_override); in spidev_release()
53 free_percpu(spi->pcpu_statistics); in spidev_release()
63 len = acpi_device_modalias(dev, buf, PAGE_SIZE - 1); in modalias_show()
64 if (len != -ENODEV) in modalias_show()
67 return sysfs_emit(buf, "%s%s\n", SPI_MODULE_PREFIX, spi->modalias); in modalias_show()
78 ret = driver_set_override(dev, &spi->driver_override, buf, count); in driver_override_store()
92 len = sysfs_emit(buf, "%s\n", spi->driver_override ? : ""); in driver_override_show()
114 u64_stats_init(&stat->syncp); in spi_alloc_pcpu_stats()
135 start = u64_stats_fetch_begin(&pcpu_stats->syncp); in spi_emit_pcpu_stats()
137 } while (u64_stats_fetch_retry(&pcpu_stats->syncp, start)); in spi_emit_pcpu_stats()
150 return spi_statistics_##field##_show(ctlr->pcpu_statistics, buf); \
161 return spi_statistics_##field##_show(spi->pcpu_statistics, buf); \
198 SPI_STATISTICS_TRANSFER_BYTES_HISTO(0, "0-1");
199 SPI_STATISTICS_TRANSFER_BYTES_HISTO(1, "2-3");
200 SPI_STATISTICS_TRANSFER_BYTES_HISTO(2, "4-7");
201 SPI_STATISTICS_TRANSFER_BYTES_HISTO(3, "8-15");
202 SPI_STATISTICS_TRANSFER_BYTES_HISTO(4, "16-31");
203 SPI_STATISTICS_TRANSFER_BYTES_HISTO(5, "32-63");
204 SPI_STATISTICS_TRANSFER_BYTES_HISTO(6, "64-127");
205 SPI_STATISTICS_TRANSFER_BYTES_HISTO(7, "128-255");
206 SPI_STATISTICS_TRANSFER_BYTES_HISTO(8, "256-511");
207 SPI_STATISTICS_TRANSFER_BYTES_HISTO(9, "512-1023");
208 SPI_STATISTICS_TRANSFER_BYTES_HISTO(10, "1024-2047");
209 SPI_STATISTICS_TRANSFER_BYTES_HISTO(11, "2048-4095");
210 SPI_STATISTICS_TRANSFER_BYTES_HISTO(12, "4096-8191");
211 SPI_STATISTICS_TRANSFER_BYTES_HISTO(13, "8192-16383");
212 SPI_STATISTICS_TRANSFER_BYTES_HISTO(14, "16384-32767");
213 SPI_STATISTICS_TRANSFER_BYTES_HISTO(15, "32768-65535");
317 int l2len = min(fls(xfer->len), SPI_STATISTICS_HISTO_SIZE) - 1; in spi_statistics_add_transfer_stats()
325 u64_stats_update_begin(&stats->syncp); in spi_statistics_add_transfer_stats()
327 u64_stats_inc(&stats->transfers); in spi_statistics_add_transfer_stats()
328 u64_stats_inc(&stats->transfer_bytes_histo[l2len]); in spi_statistics_add_transfer_stats()
330 u64_stats_add(&stats->bytes, xfer->len); in spi_statistics_add_transfer_stats()
332 u64_stats_add(&stats->bytes_tx, xfer->len); in spi_statistics_add_transfer_stats()
334 u64_stats_add(&stats->bytes_rx, xfer->len); in spi_statistics_add_transfer_stats()
336 u64_stats_update_end(&stats->syncp); in spi_statistics_add_transfer_stats()
341 * modalias support makes "modprobe $MODALIAS" new-style hotplug work,
346 while (id->name[0]) { in spi_match_id()
347 if (!strcmp(name, id->name)) in spi_match_id()
356 const struct spi_driver *sdrv = to_spi_driver(sdev->dev.driver); in spi_get_device_id()
358 return spi_match_id(sdrv->id_table, sdev->modalias); in spi_get_device_id()
366 match = device_get_match_data(&sdev->dev); in spi_get_device_match_data()
370 return (const void *)spi_get_device_id(sdev)->driver_data; in spi_get_device_match_data()
380 if (spi->driver_override) in spi_match_device()
381 return strcmp(spi->driver_override, drv->name) == 0; in spi_match_device()
391 if (sdrv->id_table) in spi_match_device()
392 return !!spi_match_id(sdrv->id_table, spi->modalias); in spi_match_device()
394 return strcmp(spi->modalias, drv->name) == 0; in spi_match_device()
403 if (rc != -ENODEV) in spi_uevent()
406 return add_uevent_var(env, "MODALIAS=%s%s", SPI_MODULE_PREFIX, spi->modalias); in spi_uevent()
411 const struct spi_driver *sdrv = to_spi_driver(dev->driver); in spi_probe()
416 ret = of_clk_set_defaults(dev->of_node, false); in spi_probe()
421 spi->irq = of_irq_get(dev->of_node, 0); in spi_probe()
422 else if (is_acpi_device_node(fwnode) && spi->irq < 0) in spi_probe()
423 spi->irq = acpi_dev_gpio_irq_get(to_acpi_device_node(fwnode), 0); in spi_probe()
424 if (spi->irq == -EPROBE_DEFER) in spi_probe()
425 return dev_err_probe(dev, spi->irq, "Failed to get irq\n"); in spi_probe()
426 if (spi->irq < 0) in spi_probe()
427 spi->irq = 0; in spi_probe()
433 if (sdrv->probe) { in spi_probe()
434 ret = sdrv->probe(spi); in spi_probe()
444 const struct spi_driver *sdrv = to_spi_driver(dev->driver); in spi_remove()
446 if (sdrv->remove) in spi_remove()
447 sdrv->remove(to_spi_device(dev)); in spi_remove()
454 if (dev->driver) { in spi_shutdown()
455 const struct spi_driver *sdrv = to_spi_driver(dev->driver); in spi_shutdown()
457 if (sdrv->shutdown) in spi_shutdown()
458 sdrv->shutdown(to_spi_device(dev)); in spi_shutdown()
474 * __spi_register_driver - register a SPI driver
483 sdrv->driver.owner = owner; in __spi_register_driver()
484 sdrv->driver.bus = &spi_bus_type; in __spi_register_driver()
491 if (sdrv->driver.of_match_table) { in __spi_register_driver()
494 for (of_id = sdrv->driver.of_match_table; of_id->compatible[0]; in __spi_register_driver()
499 of_name = strnchr(of_id->compatible, in __spi_register_driver()
500 sizeof(of_id->compatible), ','); in __spi_register_driver()
504 of_name = of_id->compatible; in __spi_register_driver()
506 if (sdrv->id_table) { in __spi_register_driver()
509 spi_id = spi_match_id(sdrv->id_table, of_name); in __spi_register_driver()
513 if (strcmp(sdrv->driver.name, of_name) == 0) in __spi_register_driver()
518 sdrv->driver.name, of_id->compatible); in __spi_register_driver()
522 return driver_register(&sdrv->driver); in __spi_register_driver()
526 /*-------------------------------------------------------------------------*/
530 * would make them board-specific. Similarly with SPI controller drivers.
531 * Device registration normally goes into like arch/.../mach.../board-YYY.c
551 * spi_alloc_device - Allocate a new SPI device
580 spi->pcpu_statistics = spi_alloc_pcpu_stats(NULL); in spi_alloc_device()
581 if (!spi->pcpu_statistics) { in spi_alloc_device()
587 spi->controller = ctlr; in spi_alloc_device()
588 spi->dev.parent = &ctlr->dev; in spi_alloc_device()
589 spi->dev.bus = &spi_bus_type; in spi_alloc_device()
590 spi->dev.release = spidev_release; in spi_alloc_device()
591 spi->mode = ctlr->buswidth_override_bits; in spi_alloc_device()
593 device_initialize(&spi->dev); in spi_alloc_device()
600 struct device *dev = &spi->dev; in spi_dev_set_name()
604 dev_set_name(dev, "spi-%s", acpi_dev_name(to_acpi_device_node(fwnode))); in spi_dev_set_name()
609 dev_set_name(dev, "spi-%pfwP", fwnode); in spi_dev_set_name()
613 dev_set_name(&spi->dev, "%s.%u", dev_name(&spi->controller->dev), in spi_dev_set_name()
619 * logical CS in the spi->chip_select[]. If all the physical CS
622 * CS can be 0. As a solution to this issue initialize all the CS to -1.
623 * Now all the unused logical CS will have -1 physical CS value & can be
626 #define SPI_INVALID_CS ((s8)-1)
645 return -EBUSY; in spi_dev_check_cs()
657 if (spi->controller == new_spi->controller) { in spi_dev_check()
669 if (spi->controller->cleanup) in spi_cleanup()
670 spi->controller->cleanup(spi); in spi_cleanup()
675 struct spi_controller *ctlr = spi->controller; in __spi_add_device()
676 struct device *dev = ctlr->dev.parent; in __spi_add_device()
683 if (is_valid_cs(cs) && cs >= ctlr->num_chipselect) { in __spi_add_device()
685 ctlr->num_chipselect); in __spi_add_device()
686 return -EINVAL; in __spi_add_device()
692 * For example, spi->chip_select[0] != spi->chip_select[1] and so on. in __spi_add_device()
716 !device_is_registered(&ctlr->dev)) { in __spi_add_device()
717 return -ENODEV; in __spi_add_device()
720 if (ctlr->cs_gpiods) { in __spi_add_device()
726 spi_set_csgpiod(spi, idx, ctlr->cs_gpiods[cs]); in __spi_add_device()
733 * using SPI_CS_HIGH can't coexist well otherwise... in __spi_add_device()
738 dev_name(&spi->dev), status); in __spi_add_device()
743 status = device_add(&spi->dev); in __spi_add_device()
746 dev_name(&spi->dev), status); in __spi_add_device()
749 dev_dbg(dev, "registered child %s\n", dev_name(&spi->dev)); in __spi_add_device()
756 * spi_add_device - Add spi_device allocated with spi_alloc_device
766 struct spi_controller *ctlr = spi->controller; in spi_add_device()
772 mutex_lock(&ctlr->add_lock); in spi_add_device()
774 mutex_unlock(&ctlr->add_lock); in spi_add_device()
788 * spi_new_device - instantiate one new SPI device
794 * after board init creates the hard-wired devices. Some development
797 * driver could add devices (which it would learn about out-of-band).
808 * NOTE: caller did any chip->bus_num checks necessary. in spi_new_device()
811 * error-or-pointer (not NULL-or-pointer), troubleshootability in spi_new_device()
819 WARN_ON(strlen(chip->modalias) >= sizeof(proxy->modalias)); in spi_new_device()
821 /* Use provided chip-select for proxy device */ in spi_new_device()
823 spi_set_chipselect(proxy, 0, chip->chip_select); in spi_new_device()
825 proxy->max_speed_hz = chip->max_speed_hz; in spi_new_device()
826 proxy->mode = chip->mode; in spi_new_device()
827 proxy->irq = chip->irq; in spi_new_device()
828 strscpy(proxy->modalias, chip->modalias, sizeof(proxy->modalias)); in spi_new_device()
829 proxy->dev.platform_data = (void *) chip->platform_data; in spi_new_device()
830 proxy->controller_data = chip->controller_data; in spi_new_device()
831 proxy->controller_state = NULL; in spi_new_device()
833 * By default spi->chip_select[0] will hold the physical CS number, in spi_new_device()
834 * so set bit 0 in spi->cs_index_mask. in spi_new_device()
836 proxy->cs_index_mask = BIT(0); in spi_new_device()
838 if (chip->swnode) { in spi_new_device()
839 status = device_add_software_node(&proxy->dev, chip->swnode); in spi_new_device()
841 dev_err(&ctlr->dev, "failed to add software node to '%s': %d\n", in spi_new_device()
842 chip->modalias, status); in spi_new_device()
854 device_remove_software_node(&proxy->dev); in spi_new_device()
861 * spi_unregister_device - unregister a single SPI device
874 fwnode = dev_fwnode(&spi->dev); in spi_unregister_device()
881 device_remove_software_node(&spi->dev); in spi_unregister_device()
882 device_del(&spi->dev); in spi_unregister_device()
884 put_device(&spi->dev); in spi_unregister_device()
893 if (ctlr->bus_num != bi->bus_num) in spi_match_controller_to_boardinfo()
898 dev_err(ctlr->dev.parent, "can't create new device for %s\n", in spi_match_controller_to_boardinfo()
899 bi->modalias); in spi_match_controller_to_boardinfo()
903 * spi_register_board_info - register SPI devices for a given board
908 * Board-specific early init code calls this (probably during arch_initcall)
912 * not make Linux forget about these hard-wired devices.
914 * Other code can also call this, e.g. a particular add-on board might provide
919 * any embedded pointers (platform_data, etc), they're copied as-is.
933 return -ENOMEM; in spi_register_board_info()
938 memcpy(&bi->board_info, info, sizeof(*info)); in spi_register_board_info()
941 list_add_tail(&bi->list, &board_list); in spi_register_board_info()
944 &bi->board_info); in spi_register_board_info()
951 /*-------------------------------------------------------------------------*/
956 * spi_res_alloc - allocate a spi resource that is life-cycle managed
978 INIT_LIST_HEAD(&sres->entry); in spi_res_alloc()
979 sres->release = release; in spi_res_alloc()
981 return sres->data; in spi_res_alloc()
985 * spi_res_free - free an SPI resource
992 WARN_ON(!list_empty(&sres->entry)); in spi_res_free()
997 * spi_res_add - add a spi_res to the spi_message
1005 WARN_ON(!list_empty(&sres->entry)); in spi_res_add()
1006 list_add_tail(&sres->entry, &message->resources); in spi_res_add()
1010 * spi_res_release - release all SPI resources for this message
1018 list_for_each_entry_safe_reverse(res, tmp, &message->resources, entry) { in spi_res_release()
1019 if (res->release) in spi_res_release()
1020 res->release(ctlr, message, res->data); in spi_res_release()
1022 list_del(&res->entry); in spi_res_release()
1028 /*-------------------------------------------------------------------------*/
1031 if (!(spi->cs_index_mask & BIT(idx))) {} else
1039 if (spi->controller->last_cs[idx] == spi_get_chipselect(spi, idx)) in spi_is_last_cs()
1048 * Historically ACPI has no means of the GPIO polarity and in spi_toggle_csgpiod()
1049 * thus the SPISerialBus() resource defines it on the per-chip in spi_toggle_csgpiod()
1050 * basis. In order to avoid a chain of negations, the GPIO in spi_toggle_csgpiod()
1053 * the GPIO CS polarity must be defined Active High to avoid in spi_toggle_csgpiod()
1057 if (is_acpi_device_node(dev_fwnode(&spi->dev))) in spi_toggle_csgpiod()
1060 /* Polarity handled by GPIO library */ in spi_toggle_csgpiod()
1064 spi_delay_exec(&spi->cs_setup, NULL); in spi_toggle_csgpiod()
1066 spi_delay_exec(&spi->cs_inactive, NULL); in spi_toggle_csgpiod()
1078 if (!force && ((enable && spi->controller->last_cs_index_mask == spi->cs_index_mask && in spi_set_cs()
1080 (!enable && spi->controller->last_cs_index_mask == spi->cs_index_mask && in spi_set_cs()
1082 (spi->controller->last_cs_mode_high == (spi->mode & SPI_CS_HIGH))) in spi_set_cs()
1087 spi->controller->last_cs_index_mask = spi->cs_index_mask; in spi_set_cs()
1089 spi->controller->last_cs[idx] = enable ? spi_get_chipselect(spi, 0) : SPI_INVALID_CS; in spi_set_cs()
1090 spi->controller->last_cs_mode_high = spi->mode & SPI_CS_HIGH; in spi_set_cs()
1092 if (spi->mode & SPI_CS_HIGH) in spi_set_cs()
1096 * Handle chip select delays for GPIO based CS or controllers without in spi_set_cs()
1099 if ((spi_is_csgpiod(spi) || !spi->controller->set_cs_timing) && !activate) in spi_set_cs()
1100 spi_delay_exec(&spi->cs_hold, NULL); in spi_set_cs()
1103 if (!(spi->mode & SPI_NO_CS)) { in spi_set_cs()
1109 /* Some SPI masters need both GPIO CS & slave_select */ in spi_set_cs()
1110 if ((spi->controller->flags & SPI_CONTROLLER_GPIO_SS) && in spi_set_cs()
1111 spi->controller->set_cs) in spi_set_cs()
1112 spi->controller->set_cs(spi, !enable); in spi_set_cs()
1113 } else if (spi->controller->set_cs) { in spi_set_cs()
1114 spi->controller->set_cs(spi, !enable); in spi_set_cs()
1117 if (spi_is_csgpiod(spi) || !spi->controller->set_cs_timing) { in spi_set_cs()
1119 spi_delay_exec(&spi->cs_setup, NULL); in spi_set_cs()
1121 spi_delay_exec(&spi->cs_inactive, NULL); in spi_set_cs()
1151 desc_len = min_t(size_t, max_seg_size, ctlr->max_dma_len); in spi_map_buf_attrs()
1154 return -EINVAL; in spi_map_buf_attrs()
1161 sg = &sgt->sgl[0]; in spi_map_buf_attrs()
1172 PAGE_SIZE - offset_in_page(buf))); in spi_map_buf_attrs()
1179 return -ENOMEM; in spi_map_buf_attrs()
1190 len -= min; in spi_map_buf_attrs()
1217 sgt->orig_nents = 0; in spi_unmap_buf_attrs()
1218 sgt->nents = 0; in spi_unmap_buf_attrs()
1233 if (!ctlr->can_dma) in __spi_map_msg()
1236 if (ctlr->dma_tx) in __spi_map_msg()
1237 tx_dev = ctlr->dma_tx->device->dev; in __spi_map_msg()
1238 else if (ctlr->dma_map_dev) in __spi_map_msg()
1239 tx_dev = ctlr->dma_map_dev; in __spi_map_msg()
1241 tx_dev = ctlr->dev.parent; in __spi_map_msg()
1243 if (ctlr->dma_rx) in __spi_map_msg()
1244 rx_dev = ctlr->dma_rx->device->dev; in __spi_map_msg()
1245 else if (ctlr->dma_map_dev) in __spi_map_msg()
1246 rx_dev = ctlr->dma_map_dev; in __spi_map_msg()
1248 rx_dev = ctlr->dev.parent; in __spi_map_msg()
1250 ret = -ENOMSG; in __spi_map_msg()
1251 list_for_each_entry(xfer, &msg->transfers, transfer_list) { in __spi_map_msg()
1255 if (!ctlr->can_dma(ctlr, msg->spi, xfer)) in __spi_map_msg()
1258 if (xfer->tx_buf != NULL) { in __spi_map_msg()
1259 ret = spi_map_buf_attrs(ctlr, tx_dev, &xfer->tx_sg, in __spi_map_msg()
1260 (void *)xfer->tx_buf, in __spi_map_msg()
1261 xfer->len, DMA_TO_DEVICE, in __spi_map_msg()
1266 xfer->tx_sg_mapped = true; in __spi_map_msg()
1269 if (xfer->rx_buf != NULL) { in __spi_map_msg()
1270 ret = spi_map_buf_attrs(ctlr, rx_dev, &xfer->rx_sg, in __spi_map_msg()
1271 xfer->rx_buf, xfer->len, in __spi_map_msg()
1275 &xfer->tx_sg, DMA_TO_DEVICE, in __spi_map_msg()
1281 xfer->rx_sg_mapped = true; in __spi_map_msg()
1288 ctlr->cur_rx_dma_dev = rx_dev; in __spi_map_msg()
1289 ctlr->cur_tx_dma_dev = tx_dev; in __spi_map_msg()
1296 struct device *rx_dev = ctlr->cur_rx_dma_dev; in __spi_unmap_msg()
1297 struct device *tx_dev = ctlr->cur_tx_dma_dev; in __spi_unmap_msg()
1300 list_for_each_entry(xfer, &msg->transfers, transfer_list) { in __spi_unmap_msg()
1304 if (xfer->rx_sg_mapped) in __spi_unmap_msg()
1305 spi_unmap_buf_attrs(ctlr, rx_dev, &xfer->rx_sg, in __spi_unmap_msg()
1307 xfer->rx_sg_mapped = false; in __spi_unmap_msg()
1309 if (xfer->tx_sg_mapped) in __spi_unmap_msg()
1310 spi_unmap_buf_attrs(ctlr, tx_dev, &xfer->tx_sg, in __spi_unmap_msg()
1312 xfer->tx_sg_mapped = false; in __spi_unmap_msg()
1321 struct device *rx_dev = ctlr->cur_rx_dma_dev; in spi_dma_sync_for_device()
1322 struct device *tx_dev = ctlr->cur_tx_dma_dev; in spi_dma_sync_for_device()
1324 if (xfer->tx_sg_mapped) in spi_dma_sync_for_device()
1325 dma_sync_sgtable_for_device(tx_dev, &xfer->tx_sg, DMA_TO_DEVICE); in spi_dma_sync_for_device()
1326 if (xfer->rx_sg_mapped) in spi_dma_sync_for_device()
1327 dma_sync_sgtable_for_device(rx_dev, &xfer->rx_sg, DMA_FROM_DEVICE); in spi_dma_sync_for_device()
1333 struct device *rx_dev = ctlr->cur_rx_dma_dev; in spi_dma_sync_for_cpu()
1334 struct device *tx_dev = ctlr->cur_tx_dma_dev; in spi_dma_sync_for_cpu()
1336 if (xfer->rx_sg_mapped) in spi_dma_sync_for_cpu()
1337 dma_sync_sgtable_for_cpu(rx_dev, &xfer->rx_sg, DMA_FROM_DEVICE); in spi_dma_sync_for_cpu()
1338 if (xfer->tx_sg_mapped) in spi_dma_sync_for_cpu()
1339 dma_sync_sgtable_for_cpu(tx_dev, &xfer->tx_sg, DMA_TO_DEVICE); in spi_dma_sync_for_cpu()
1370 list_for_each_entry(xfer, &msg->transfers, transfer_list) { in spi_unmap_msg()
1375 if (xfer->tx_buf == ctlr->dummy_tx) in spi_unmap_msg()
1376 xfer->tx_buf = NULL; in spi_unmap_msg()
1377 if (xfer->rx_buf == ctlr->dummy_rx) in spi_unmap_msg()
1378 xfer->rx_buf = NULL; in spi_unmap_msg()
1390 if ((ctlr->flags & (SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX)) in spi_map_msg()
1391 && !(msg->spi->mode & SPI_3WIRE)) { in spi_map_msg()
1395 list_for_each_entry(xfer, &msg->transfers, transfer_list) { in spi_map_msg()
1396 if ((ctlr->flags & SPI_CONTROLLER_MUST_TX) && in spi_map_msg()
1397 !xfer->tx_buf) in spi_map_msg()
1398 max_tx = max(xfer->len, max_tx); in spi_map_msg()
1399 if ((ctlr->flags & SPI_CONTROLLER_MUST_RX) && in spi_map_msg()
1400 !xfer->rx_buf) in spi_map_msg()
1401 max_rx = max(xfer->len, max_rx); in spi_map_msg()
1405 tmp = krealloc(ctlr->dummy_tx, max_tx, in spi_map_msg()
1408 return -ENOMEM; in spi_map_msg()
1409 ctlr->dummy_tx = tmp; in spi_map_msg()
1413 tmp = krealloc(ctlr->dummy_rx, max_rx, in spi_map_msg()
1416 return -ENOMEM; in spi_map_msg()
1417 ctlr->dummy_rx = tmp; in spi_map_msg()
1421 list_for_each_entry(xfer, &msg->transfers, in spi_map_msg()
1423 if (!xfer->len) in spi_map_msg()
1425 if (!xfer->tx_buf) in spi_map_msg()
1426 xfer->tx_buf = ctlr->dummy_tx; in spi_map_msg()
1427 if (!xfer->rx_buf) in spi_map_msg()
1428 xfer->rx_buf = ctlr->dummy_rx; in spi_map_msg()
1440 struct spi_statistics __percpu *statm = ctlr->pcpu_statistics; in spi_transfer_wait()
1441 struct spi_statistics __percpu *stats = msg->spi->pcpu_statistics; in spi_transfer_wait()
1442 u32 speed_hz = xfer->speed_hz; in spi_transfer_wait()
1446 if (wait_for_completion_interruptible(&ctlr->xfer_completion)) { in spi_transfer_wait()
1447 dev_dbg(&msg->spi->dev, "SPI transfer interrupted\n"); in spi_transfer_wait()
1448 return -EINTR; in spi_transfer_wait()
1460 ms = 8LL * MSEC_PER_SEC * xfer->len; in spi_transfer_wait()
1471 ms = wait_for_completion_timeout(&ctlr->xfer_completion, in spi_transfer_wait()
1477 dev_err(&msg->spi->dev, in spi_transfer_wait()
1479 return -ETIMEDOUT; in spi_transfer_wait()
1482 if (xfer->error & SPI_TRANS_FAIL_IO) in spi_transfer_wait()
1483 return -EIO; in spi_transfer_wait()
1507 u32 delay = _delay->value; in spi_delay_to_ns()
1508 u32 unit = _delay->unit; in spi_delay_to_ns()
1524 return -EINVAL; in spi_delay_to_ns()
1529 hz = xfer->effective_speed_hz ?: xfer->speed_hz / 2; in spi_delay_to_ns()
1531 return -EINVAL; in spi_delay_to_ns()
1537 return -EINVAL; in spi_delay_to_ns()
1551 return -EINVAL; in spi_delay_exec()
1567 u32 delay = xfer->cs_change_delay.value; in _spi_transfer_cs_change_delay()
1568 u32 unit = xfer->cs_change_delay.unit; in _spi_transfer_cs_change_delay()
1571 /* Return early on "fast" mode - for everything but USECS */ in _spi_transfer_cs_change_delay()
1578 ret = spi_delay_exec(&xfer->cs_change_delay, xfer); in _spi_transfer_cs_change_delay()
1580 dev_err_once(&msg->spi->dev, in _spi_transfer_cs_change_delay()
1595 * spi_transfer_one_message - Default implementation of transfer_one_message()
1607 struct spi_statistics __percpu *statm = ctlr->pcpu_statistics; in spi_transfer_one_message()
1608 struct spi_statistics __percpu *stats = msg->spi->pcpu_statistics; in spi_transfer_one_message()
1610 xfer = list_first_entry(&msg->transfers, struct spi_transfer, transfer_list); in spi_transfer_one_message()
1611 spi_set_cs(msg->spi, !xfer->cs_off, false); in spi_transfer_one_message()
1616 list_for_each_entry(xfer, &msg->transfers, transfer_list) { in spi_transfer_one_message()
1622 if (!ctlr->ptp_sts_supported) { in spi_transfer_one_message()
1623 xfer->ptp_sts_word_pre = 0; in spi_transfer_one_message()
1624 ptp_read_system_prets(xfer->ptp_sts); in spi_transfer_one_message()
1627 if ((xfer->tx_buf || xfer->rx_buf) && xfer->len) { in spi_transfer_one_message()
1628 reinit_completion(&ctlr->xfer_completion); in spi_transfer_one_message()
1632 ret = ctlr->transfer_one(ctlr, msg->spi, xfer); in spi_transfer_one_message()
1636 if ((xfer->tx_sg_mapped || xfer->rx_sg_mapped) && in spi_transfer_one_message()
1637 (xfer->error & SPI_TRANS_FAIL_NO_START)) { in spi_transfer_one_message()
1639 ctlr->fallback = true; in spi_transfer_one_message()
1640 xfer->error &= ~SPI_TRANS_FAIL_NO_START; in spi_transfer_one_message()
1648 dev_err(&msg->spi->dev, in spi_transfer_one_message()
1656 msg->status = ret; in spi_transfer_one_message()
1661 if (xfer->len) in spi_transfer_one_message()
1662 dev_err(&msg->spi->dev, in spi_transfer_one_message()
1664 xfer->len); in spi_transfer_one_message()
1667 if (!ctlr->ptp_sts_supported) { in spi_transfer_one_message()
1668 ptp_read_system_postts(xfer->ptp_sts); in spi_transfer_one_message()
1669 xfer->ptp_sts_word_post = xfer->len; in spi_transfer_one_message()
1674 if (msg->status != -EINPROGRESS) in spi_transfer_one_message()
1679 if (xfer->cs_change) { in spi_transfer_one_message()
1680 if (list_is_last(&xfer->transfer_list, in spi_transfer_one_message()
1681 &msg->transfers)) { in spi_transfer_one_message()
1684 if (!xfer->cs_off) in spi_transfer_one_message()
1685 spi_set_cs(msg->spi, false, false); in spi_transfer_one_message()
1687 if (!list_next_entry(xfer, transfer_list)->cs_off) in spi_transfer_one_message()
1688 spi_set_cs(msg->spi, true, false); in spi_transfer_one_message()
1690 } else if (!list_is_last(&xfer->transfer_list, &msg->transfers) && in spi_transfer_one_message()
1691 xfer->cs_off != list_next_entry(xfer, transfer_list)->cs_off) { in spi_transfer_one_message()
1692 spi_set_cs(msg->spi, xfer->cs_off, false); in spi_transfer_one_message()
1695 msg->actual_length += xfer->len; in spi_transfer_one_message()
1700 spi_set_cs(msg->spi, false, false); in spi_transfer_one_message()
1702 if (msg->status == -EINPROGRESS) in spi_transfer_one_message()
1703 msg->status = ret; in spi_transfer_one_message()
1705 if (msg->status && ctlr->handle_err) in spi_transfer_one_message()
1706 ctlr->handle_err(ctlr, msg); in spi_transfer_one_message()
1714 * spi_finalize_current_transfer - report completion of a transfer
1723 complete(&ctlr->xfer_completion); in spi_finalize_current_transfer()
1729 if (ctlr->auto_runtime_pm) { in spi_idle_runtime_pm()
1730 pm_runtime_mark_last_busy(ctlr->dev.parent); in spi_idle_runtime_pm()
1731 pm_runtime_put_autosuspend(ctlr->dev.parent); in spi_idle_runtime_pm()
1741 if (!was_busy && ctlr->auto_runtime_pm) { in __spi_pump_transfer_message()
1742 ret = pm_runtime_get_sync(ctlr->dev.parent); in __spi_pump_transfer_message()
1744 pm_runtime_put_noidle(ctlr->dev.parent); in __spi_pump_transfer_message()
1745 dev_err(&ctlr->dev, "Failed to power device: %d\n", in __spi_pump_transfer_message()
1748 msg->status = ret; in __spi_pump_transfer_message()
1758 if (!was_busy && ctlr->prepare_transfer_hardware) { in __spi_pump_transfer_message()
1759 ret = ctlr->prepare_transfer_hardware(ctlr); in __spi_pump_transfer_message()
1761 dev_err(&ctlr->dev, in __spi_pump_transfer_message()
1765 if (ctlr->auto_runtime_pm) in __spi_pump_transfer_message()
1766 pm_runtime_put(ctlr->dev.parent); in __spi_pump_transfer_message()
1768 msg->status = ret; in __spi_pump_transfer_message()
1777 if (ctlr->prepare_message) { in __spi_pump_transfer_message()
1778 ret = ctlr->prepare_message(ctlr, msg); in __spi_pump_transfer_message()
1780 dev_err(&ctlr->dev, "failed to prepare message: %d\n", in __spi_pump_transfer_message()
1782 msg->status = ret; in __spi_pump_transfer_message()
1786 msg->prepared = true; in __spi_pump_transfer_message()
1791 msg->status = ret; in __spi_pump_transfer_message()
1796 if (!ctlr->ptp_sts_supported && !ctlr->transfer_one) { in __spi_pump_transfer_message()
1797 list_for_each_entry(xfer, &msg->transfers, transfer_list) { in __spi_pump_transfer_message()
1798 xfer->ptp_sts_word_pre = 0; in __spi_pump_transfer_message()
1799 ptp_read_system_prets(xfer->ptp_sts); in __spi_pump_transfer_message()
1809 * ctlr->cur_msg. in __spi_pump_transfer_message()
1816 WRITE_ONCE(ctlr->cur_msg_incomplete, true); in __spi_pump_transfer_message()
1817 WRITE_ONCE(ctlr->cur_msg_need_completion, false); in __spi_pump_transfer_message()
1818 reinit_completion(&ctlr->cur_msg_completion); in __spi_pump_transfer_message()
1821 ret = ctlr->transfer_one_message(ctlr, msg); in __spi_pump_transfer_message()
1823 dev_err(&ctlr->dev, in __spi_pump_transfer_message()
1828 WRITE_ONCE(ctlr->cur_msg_need_completion, true); in __spi_pump_transfer_message()
1830 if (READ_ONCE(ctlr->cur_msg_incomplete)) in __spi_pump_transfer_message()
1831 wait_for_completion(&ctlr->cur_msg_completion); in __spi_pump_transfer_message()
1837 * __spi_pump_messages - function which processes SPI message queue
1857 mutex_lock(&ctlr->io_mutex); in __spi_pump_messages()
1860 spin_lock_irqsave(&ctlr->queue_lock, flags); in __spi_pump_messages()
1863 if (ctlr->cur_msg) in __spi_pump_messages()
1867 if (list_empty(&ctlr->queue) || !ctlr->running) { in __spi_pump_messages()
1868 if (!ctlr->busy) in __spi_pump_messages()
1871 /* Defer any non-atomic teardown to the thread */ in __spi_pump_messages()
1873 if (!ctlr->dummy_rx && !ctlr->dummy_tx && in __spi_pump_messages()
1874 !ctlr->unprepare_transfer_hardware) { in __spi_pump_messages()
1876 ctlr->busy = false; in __spi_pump_messages()
1877 ctlr->queue_empty = true; in __spi_pump_messages()
1880 kthread_queue_work(ctlr->kworker, in __spi_pump_messages()
1881 &ctlr->pump_messages); in __spi_pump_messages()
1886 ctlr->busy = false; in __spi_pump_messages()
1887 spin_unlock_irqrestore(&ctlr->queue_lock, flags); in __spi_pump_messages()
1889 kfree(ctlr->dummy_rx); in __spi_pump_messages()
1890 ctlr->dummy_rx = NULL; in __spi_pump_messages()
1891 kfree(ctlr->dummy_tx); in __spi_pump_messages()
1892 ctlr->dummy_tx = NULL; in __spi_pump_messages()
1893 if (ctlr->unprepare_transfer_hardware && in __spi_pump_messages()
1894 ctlr->unprepare_transfer_hardware(ctlr)) in __spi_pump_messages()
1895 dev_err(&ctlr->dev, in __spi_pump_messages()
1900 spin_lock_irqsave(&ctlr->queue_lock, flags); in __spi_pump_messages()
1901 ctlr->queue_empty = true; in __spi_pump_messages()
1906 msg = list_first_entry(&ctlr->queue, struct spi_message, queue); in __spi_pump_messages()
1907 ctlr->cur_msg = msg; in __spi_pump_messages()
1909 list_del_init(&msg->queue); in __spi_pump_messages()
1910 if (ctlr->busy) in __spi_pump_messages()
1913 ctlr->busy = true; in __spi_pump_messages()
1914 spin_unlock_irqrestore(&ctlr->queue_lock, flags); in __spi_pump_messages()
1917 kthread_queue_work(ctlr->kworker, &ctlr->pump_messages); in __spi_pump_messages()
1919 ctlr->cur_msg = NULL; in __spi_pump_messages()
1920 ctlr->fallback = false; in __spi_pump_messages()
1922 mutex_unlock(&ctlr->io_mutex); in __spi_pump_messages()
1930 spin_unlock_irqrestore(&ctlr->queue_lock, flags); in __spi_pump_messages()
1931 mutex_unlock(&ctlr->io_mutex); in __spi_pump_messages()
1935 * spi_pump_messages - kthread work function which processes spi message queue
1947 * spi_take_timestamp_pre - helper to collect the beginning of the TX timestamp
1970 if (!xfer->ptp_sts) in spi_take_timestamp_pre()
1973 if (xfer->timestamped) in spi_take_timestamp_pre()
1976 if (progress > xfer->ptp_sts_word_pre) in spi_take_timestamp_pre()
1980 xfer->ptp_sts_word_pre = progress; in spi_take_timestamp_pre()
1983 local_irq_save(ctlr->irq_flags); in spi_take_timestamp_pre()
1987 ptp_read_system_prets(xfer->ptp_sts); in spi_take_timestamp_pre()
1992 * spi_take_timestamp_post - helper to collect the end of the TX timestamp
1996 * @irqs_off: If true, will re-enable IRQs and preemption for the local CPU.
2007 if (!xfer->ptp_sts) in spi_take_timestamp_post()
2010 if (xfer->timestamped) in spi_take_timestamp_post()
2013 if (progress < xfer->ptp_sts_word_post) in spi_take_timestamp_post()
2016 ptp_read_system_postts(xfer->ptp_sts); in spi_take_timestamp_post()
2019 local_irq_restore(ctlr->irq_flags); in spi_take_timestamp_post()
2024 xfer->ptp_sts_word_post = progress; in spi_take_timestamp_post()
2026 xfer->timestamped = 1; in spi_take_timestamp_post()
2031 * spi_set_thread_rt - set the controller to pump at realtime priority
2035 * (by setting the ->rt value before calling spi_register_controller()) or
2047 dev_info(&ctlr->dev, in spi_set_thread_rt()
2049 sched_set_fifo(ctlr->kworker->task); in spi_set_thread_rt()
2054 ctlr->running = false; in spi_init_queue()
2055 ctlr->busy = false; in spi_init_queue()
2056 ctlr->queue_empty = true; in spi_init_queue()
2058 ctlr->kworker = kthread_run_worker(0, dev_name(&ctlr->dev)); in spi_init_queue()
2059 if (IS_ERR(ctlr->kworker)) { in spi_init_queue()
2060 dev_err(&ctlr->dev, "failed to create message pump kworker\n"); in spi_init_queue()
2061 return PTR_ERR(ctlr->kworker); in spi_init_queue()
2064 kthread_init_work(&ctlr->pump_messages, spi_pump_messages); in spi_init_queue()
2073 if (ctlr->rt) in spi_init_queue()
2080 * spi_get_next_queued_message() - called by driver to check for queued
2095 spin_lock_irqsave(&ctlr->queue_lock, flags); in spi_get_next_queued_message()
2096 next = list_first_entry_or_null(&ctlr->queue, struct spi_message, in spi_get_next_queued_message()
2098 spin_unlock_irqrestore(&ctlr->queue_lock, flags); in spi_get_next_queued_message()
2105 * __spi_unoptimize_message - shared implementation of spi_unoptimize_message()
2117 struct spi_controller *ctlr = msg->spi->controller; in __spi_unoptimize_message()
2119 if (ctlr->unoptimize_message) in __spi_unoptimize_message()
2120 ctlr->unoptimize_message(msg); in __spi_unoptimize_message()
2124 msg->optimized = false; in __spi_unoptimize_message()
2125 msg->opt_state = NULL; in __spi_unoptimize_message()
2129 * spi_maybe_unoptimize_message - unoptimize msg not managed by a peripheral
2137 if (!msg->pre_optimized && msg->optimized && in spi_maybe_unoptimize_message()
2138 !msg->spi->controller->defer_optimize_message) in spi_maybe_unoptimize_message()
2143 * spi_finalize_current_message() - the current message is complete
2155 mesg = ctlr->cur_msg; in spi_finalize_current_message()
2157 if (!ctlr->ptp_sts_supported && !ctlr->transfer_one) { in spi_finalize_current_message()
2158 list_for_each_entry(xfer, &mesg->transfers, transfer_list) { in spi_finalize_current_message()
2159 ptp_read_system_postts(xfer->ptp_sts); in spi_finalize_current_message()
2160 xfer->ptp_sts_word_post = xfer->len; in spi_finalize_current_message()
2164 if (unlikely(ctlr->ptp_sts_supported)) in spi_finalize_current_message()
2165 list_for_each_entry(xfer, &mesg->transfers, transfer_list) in spi_finalize_current_message()
2166 WARN_ON_ONCE(xfer->ptp_sts && !xfer->timestamped); in spi_finalize_current_message()
2170 if (mesg->prepared && ctlr->unprepare_message) { in spi_finalize_current_message()
2171 ret = ctlr->unprepare_message(ctlr, mesg); in spi_finalize_current_message()
2173 dev_err(&ctlr->dev, "failed to unprepare message: %d\n", in spi_finalize_current_message()
2178 mesg->prepared = false; in spi_finalize_current_message()
2182 WRITE_ONCE(ctlr->cur_msg_incomplete, false); in spi_finalize_current_message()
2184 if (READ_ONCE(ctlr->cur_msg_need_completion)) in spi_finalize_current_message()
2185 complete(&ctlr->cur_msg_completion); in spi_finalize_current_message()
2189 mesg->state = NULL; in spi_finalize_current_message()
2190 if (mesg->complete) in spi_finalize_current_message()
2191 mesg->complete(mesg->context); in spi_finalize_current_message()
2199 spin_lock_irqsave(&ctlr->queue_lock, flags); in spi_start_queue()
2201 if (ctlr->running || ctlr->busy) { in spi_start_queue()
2202 spin_unlock_irqrestore(&ctlr->queue_lock, flags); in spi_start_queue()
2203 return -EBUSY; in spi_start_queue()
2206 ctlr->running = true; in spi_start_queue()
2207 ctlr->cur_msg = NULL; in spi_start_queue()
2208 spin_unlock_irqrestore(&ctlr->queue_lock, flags); in spi_start_queue()
2210 kthread_queue_work(ctlr->kworker, &ctlr->pump_messages); in spi_start_queue()
2222 * A wait_queue on the ctlr->busy could be used, but then the common in spi_stop_queue()
2227 spin_lock_irqsave(&ctlr->queue_lock, flags); in spi_stop_queue()
2228 if (list_empty(&ctlr->queue) && !ctlr->busy) { in spi_stop_queue()
2229 ctlr->running = false; in spi_stop_queue()
2230 spin_unlock_irqrestore(&ctlr->queue_lock, flags); in spi_stop_queue()
2233 spin_unlock_irqrestore(&ctlr->queue_lock, flags); in spi_stop_queue()
2235 } while (--limit); in spi_stop_queue()
2237 return -EBUSY; in spi_stop_queue()
2253 dev_err(&ctlr->dev, "problem destroying queue\n"); in spi_destroy_queue()
2257 kthread_destroy_worker(ctlr->kworker); in spi_destroy_queue()
2266 struct spi_controller *ctlr = spi->controller; in __spi_queued_transfer()
2269 spin_lock_irqsave(&ctlr->queue_lock, flags); in __spi_queued_transfer()
2271 if (!ctlr->running) { in __spi_queued_transfer()
2272 spin_unlock_irqrestore(&ctlr->queue_lock, flags); in __spi_queued_transfer()
2273 return -ESHUTDOWN; in __spi_queued_transfer()
2275 msg->actual_length = 0; in __spi_queued_transfer()
2276 msg->status = -EINPROGRESS; in __spi_queued_transfer()
2278 list_add_tail(&msg->queue, &ctlr->queue); in __spi_queued_transfer()
2279 ctlr->queue_empty = false; in __spi_queued_transfer()
2280 if (!ctlr->busy && need_pump) in __spi_queued_transfer()
2281 kthread_queue_work(ctlr->kworker, &ctlr->pump_messages); in __spi_queued_transfer()
2283 spin_unlock_irqrestore(&ctlr->queue_lock, flags); in __spi_queued_transfer()
2288 * spi_queued_transfer - transfer function for queued transfers
2303 ctlr->transfer = spi_queued_transfer; in spi_controller_initialize_queue()
2304 if (!ctlr->transfer_one_message) in spi_controller_initialize_queue()
2305 ctlr->transfer_one_message = spi_transfer_one_message; in spi_controller_initialize_queue()
2310 dev_err(&ctlr->dev, "problem initializing queue\n"); in spi_controller_initialize_queue()
2313 ctlr->queued = true; in spi_controller_initialize_queue()
2316 dev_err(&ctlr->dev, "problem starting queue\n"); in spi_controller_initialize_queue()
2329 * spi_flush_queue - Send all pending messages in the queue from the callers'
2334 * sent before doing something. Is used by the spi-mem code to make sure SPI
2336 * before the spi-mem operation.
2340 if (ctlr->transfer == spi_queued_transfer) in spi_flush_queue()
2344 /*-------------------------------------------------------------------------*/
2354 delay->value = DIV_ROUND_UP(value, 1000); in of_spi_parse_dt_cs_delay()
2355 delay->unit = SPI_DELAY_UNIT_USECS; in of_spi_parse_dt_cs_delay()
2357 delay->value = value; in of_spi_parse_dt_cs_delay()
2358 delay->unit = SPI_DELAY_UNIT_NSECS; in of_spi_parse_dt_cs_delay()
2370 if (of_property_read_bool(nc, "spi-cpha")) in of_spi_parse_dt()
2371 spi->mode |= SPI_CPHA; in of_spi_parse_dt()
2372 if (of_property_read_bool(nc, "spi-cpol")) in of_spi_parse_dt()
2373 spi->mode |= SPI_CPOL; in of_spi_parse_dt()
2374 if (of_property_read_bool(nc, "spi-3wire")) in of_spi_parse_dt()
2375 spi->mode |= SPI_3WIRE; in of_spi_parse_dt()
2376 if (of_property_read_bool(nc, "spi-lsb-first")) in of_spi_parse_dt()
2377 spi->mode |= SPI_LSB_FIRST; in of_spi_parse_dt()
2378 if (of_property_read_bool(nc, "spi-cs-high")) in of_spi_parse_dt()
2379 spi->mode |= SPI_CS_HIGH; in of_spi_parse_dt()
2382 if (!of_property_read_u32(nc, "spi-tx-bus-width", &value)) { in of_spi_parse_dt()
2385 spi->mode |= SPI_NO_TX; in of_spi_parse_dt()
2390 spi->mode |= SPI_TX_DUAL; in of_spi_parse_dt()
2393 spi->mode |= SPI_TX_QUAD; in of_spi_parse_dt()
2396 spi->mode |= SPI_TX_OCTAL; in of_spi_parse_dt()
2399 dev_warn(&ctlr->dev, in of_spi_parse_dt()
2400 "spi-tx-bus-width %d not supported\n", in of_spi_parse_dt()
2406 if (!of_property_read_u32(nc, "spi-rx-bus-width", &value)) { in of_spi_parse_dt()
2409 spi->mode |= SPI_NO_RX; in of_spi_parse_dt()
2414 spi->mode |= SPI_RX_DUAL; in of_spi_parse_dt()
2417 spi->mode |= SPI_RX_QUAD; in of_spi_parse_dt()
2420 spi->mode |= SPI_RX_OCTAL; in of_spi_parse_dt()
2423 dev_warn(&ctlr->dev, in of_spi_parse_dt()
2424 "spi-rx-bus-width %d not supported\n", in of_spi_parse_dt()
2432 dev_err(&ctlr->dev, "%pOF is not called 'slave'\n", in of_spi_parse_dt()
2434 return -EINVAL; in of_spi_parse_dt()
2439 if (ctlr->num_chipselect > SPI_CS_CNT_MAX) { in of_spi_parse_dt()
2440 dev_err(&ctlr->dev, "No. of CS is more than max. no. of supported CS\n"); in of_spi_parse_dt()
2441 return -EINVAL; in of_spi_parse_dt()
2450 dev_err(&ctlr->dev, "%pOF has no valid 'reg' property (%d)\n", in of_spi_parse_dt()
2454 if (rc > ctlr->num_chipselect) { in of_spi_parse_dt()
2455 dev_err(&ctlr->dev, "%pOF has number of CS > ctlr->num_chipselect (%d)\n", in of_spi_parse_dt()
2459 if ((of_property_present(nc, "parallel-memories")) && in of_spi_parse_dt()
2460 (!(ctlr->flags & SPI_CONTROLLER_MULTI_CS))) { in of_spi_parse_dt()
2461 dev_err(&ctlr->dev, "SPI controller doesn't support multi CS\n"); in of_spi_parse_dt()
2462 return -EINVAL; in of_spi_parse_dt()
2468 * By default spi->chip_select[0] will hold the physical CS number, in of_spi_parse_dt()
2469 * so set bit 0 in spi->cs_index_mask. in of_spi_parse_dt()
2471 spi->cs_index_mask = BIT(0); in of_spi_parse_dt()
2474 if (!of_property_read_u32(nc, "spi-max-frequency", &value)) in of_spi_parse_dt()
2475 spi->max_speed_hz = value; in of_spi_parse_dt()
2478 of_spi_parse_dt_cs_delay(nc, &spi->cs_setup, "spi-cs-setup-delay-ns"); in of_spi_parse_dt()
2479 of_spi_parse_dt_cs_delay(nc, &spi->cs_hold, "spi-cs-hold-delay-ns"); in of_spi_parse_dt()
2480 of_spi_parse_dt_cs_delay(nc, &spi->cs_inactive, "spi-cs-inactive-delay-ns"); in of_spi_parse_dt()
2494 dev_err(&ctlr->dev, "spi_device alloc error for %pOF\n", nc); in of_register_spi_device()
2495 rc = -ENOMEM; in of_register_spi_device()
2500 rc = of_alias_from_compatible(nc, spi->modalias, in of_register_spi_device()
2501 sizeof(spi->modalias)); in of_register_spi_device()
2503 dev_err(&ctlr->dev, "cannot find modalias for %pOF\n", nc); in of_register_spi_device()
2514 device_set_node(&spi->dev, of_fwnode_handle(nc)); in of_register_spi_device()
2519 dev_err(&ctlr->dev, "spi_device register error %pOF\n", nc); in of_register_spi_device()
2533 * of_register_spi_devices() - Register child devices onto the SPI bus
2544 for_each_available_child_of_node(ctlr->dev.of_node, nc) { in of_register_spi_devices()
2549 dev_warn(&ctlr->dev, in of_register_spi_devices()
2560 * spi_new_ancillary_device() - Register ancillary SPI device
2564 * Register an ancillary SPI device; for example some chips have a chip-select
2574 struct spi_controller *ctlr = spi->controller; in spi_new_ancillary_device()
2581 rc = -ENOMEM; in spi_new_ancillary_device()
2585 strscpy(ancillary->modalias, "dummy", sizeof(ancillary->modalias)); in spi_new_ancillary_device()
2587 /* Use provided chip-select for ancillary device */ in spi_new_ancillary_device()
2592 ancillary->max_speed_hz = spi->max_speed_hz; in spi_new_ancillary_device()
2593 ancillary->mode = spi->mode; in spi_new_ancillary_device()
2595 * By default spi->chip_select[0] will hold the physical CS number, in spi_new_ancillary_device()
2596 * so set bit 0 in spi->cs_index_mask. in spi_new_ancillary_device()
2598 ancillary->cs_index_mask = BIT(0); in spi_new_ancillary_device()
2600 WARN_ON(!mutex_is_locked(&ctlr->add_lock)); in spi_new_ancillary_device()
2605 dev_err(&spi->dev, "failed to register ancillary device\n"); in spi_new_ancillary_device()
2634 if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS) in acpi_spi_count()
2637 sb = &ares->data.spi_serial_bus; in acpi_spi_count()
2638 if (sb->type != ACPI_RESOURCE_SERIAL_TYPE_SPI) in acpi_spi_count()
2647 * acpi_spi_count_resources - Count the number of SpiSerialBus resources
2650 * Return: the number of SpiSerialBus resources in the ACPI-device's
2651 * resource-list; or a negative error code.
2678 && obj->buffer.length >= 4) in acpi_spi_parse_apple_properties()
2679 lookup->max_speed_hz = NSEC_PER_SEC / *(u32 *)obj->buffer.pointer; in acpi_spi_parse_apple_properties()
2682 && obj->buffer.length == 8) in acpi_spi_parse_apple_properties()
2683 lookup->bits_per_word = *(u64 *)obj->buffer.pointer; in acpi_spi_parse_apple_properties()
2686 && obj->buffer.length == 8 && !*(u64 *)obj->buffer.pointer) in acpi_spi_parse_apple_properties()
2687 lookup->mode |= SPI_LSB_FIRST; in acpi_spi_parse_apple_properties()
2690 && obj->buffer.length == 8 && *(u64 *)obj->buffer.pointer) in acpi_spi_parse_apple_properties()
2691 lookup->mode |= SPI_CPOL; in acpi_spi_parse_apple_properties()
2694 && obj->buffer.length == 8 && *(u64 *)obj->buffer.pointer) in acpi_spi_parse_apple_properties()
2695 lookup->mode |= SPI_CPHA; in acpi_spi_parse_apple_properties()
2701 struct spi_controller *ctlr = lookup->ctlr; in acpi_spi_add_resource()
2703 if (ares->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) { in acpi_spi_add_resource()
2708 sb = &ares->data.spi_serial_bus; in acpi_spi_add_resource()
2709 if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_SPI) { in acpi_spi_add_resource()
2711 if (lookup->index != -1 && lookup->n++ != lookup->index) in acpi_spi_add_resource()
2715 sb->resource_source.string_ptr, in acpi_spi_add_resource()
2719 return -ENODEV; in acpi_spi_add_resource()
2722 if (!device_match_acpi_handle(ctlr->dev.parent, parent_handle)) in acpi_spi_add_resource()
2723 return -ENODEV; in acpi_spi_add_resource()
2729 return -ENODEV; in acpi_spi_add_resource()
2733 return -EPROBE_DEFER; in acpi_spi_add_resource()
2735 lookup->ctlr = ctlr; in acpi_spi_add_resource()
2742 * 0 .. max - 1 so we need to ask the driver to in acpi_spi_add_resource()
2745 if (ctlr->fw_translate_cs) { in acpi_spi_add_resource()
2746 int cs = ctlr->fw_translate_cs(ctlr, in acpi_spi_add_resource()
2747 sb->device_selection); in acpi_spi_add_resource()
2750 lookup->chip_select = cs; in acpi_spi_add_resource()
2752 lookup->chip_select = sb->device_selection; in acpi_spi_add_resource()
2755 lookup->max_speed_hz = sb->connection_speed; in acpi_spi_add_resource()
2756 lookup->bits_per_word = sb->data_bit_length; in acpi_spi_add_resource()
2758 if (sb->clock_phase == ACPI_SPI_SECOND_PHASE) in acpi_spi_add_resource()
2759 lookup->mode |= SPI_CPHA; in acpi_spi_add_resource()
2760 if (sb->clock_polarity == ACPI_SPI_START_HIGH) in acpi_spi_add_resource()
2761 lookup->mode |= SPI_CPOL; in acpi_spi_add_resource()
2762 if (sb->device_polarity == ACPI_SPI_ACTIVE_HIGH) in acpi_spi_add_resource()
2763 lookup->mode |= SPI_CS_HIGH; in acpi_spi_add_resource()
2765 } else if (lookup->irq < 0) { in acpi_spi_add_resource()
2769 lookup->irq = r.start; in acpi_spi_add_resource()
2777 * acpi_spi_device_alloc - Allocate a spi device, and fill it in with ACPI information
2787 * If index is set to -1, index is not used.
2788 * Note: If index is -1, ctlr must be set.
2802 if (!ctlr && index == -1) in acpi_spi_device_alloc()
2803 return ERR_PTR(-EINVAL); in acpi_spi_device_alloc()
2806 lookup.irq = -1; in acpi_spi_device_alloc()
2820 ACPI_SUCCESS(acpi_get_parent(adev->handle, &parent_handle)) && in acpi_spi_device_alloc()
2821 device_match_acpi_handle(lookup.ctlr->dev.parent, parent_handle)) { in acpi_spi_device_alloc()
2827 return ERR_PTR(-ENODEV); in acpi_spi_device_alloc()
2831 dev_err(&lookup.ctlr->dev, "failed to allocate SPI device for %s\n", in acpi_spi_device_alloc()
2832 dev_name(&adev->dev)); in acpi_spi_device_alloc()
2833 return ERR_PTR(-ENOMEM); in acpi_spi_device_alloc()
2839 ACPI_COMPANION_SET(&spi->dev, adev); in acpi_spi_device_alloc()
2840 spi->max_speed_hz = lookup.max_speed_hz; in acpi_spi_device_alloc()
2841 spi->mode |= lookup.mode; in acpi_spi_device_alloc()
2842 spi->irq = lookup.irq; in acpi_spi_device_alloc()
2843 spi->bits_per_word = lookup.bits_per_word; in acpi_spi_device_alloc()
2845 * By default spi->chip_select[0] will hold the physical CS number, in acpi_spi_device_alloc()
2846 * so set bit 0 in spi->cs_index_mask. in acpi_spi_device_alloc()
2848 spi->cs_index_mask = BIT(0); in acpi_spi_device_alloc()
2859 if (acpi_bus_get_status(adev) || !adev->status.present || in acpi_register_spi_device()
2863 spi = acpi_spi_device_alloc(ctlr, adev, -1); in acpi_register_spi_device()
2865 if (PTR_ERR(spi) == -ENOMEM) in acpi_register_spi_device()
2871 acpi_set_modalias(adev, acpi_device_hid(adev), spi->modalias, in acpi_register_spi_device()
2872 sizeof(spi->modalias)); in acpi_register_spi_device()
2876 adev->power.flags.ignore_parent = true; in acpi_register_spi_device()
2878 adev->power.flags.ignore_parent = false; in acpi_register_spi_device()
2879 dev_err(&ctlr->dev, "failed to add SPI device %s from ACPI\n", in acpi_register_spi_device()
2880 dev_name(&adev->dev)); in acpi_register_spi_device()
2906 handle = ACPI_HANDLE(ctlr->dev.parent); in acpi_register_spi_devices()
2914 dev_warn(&ctlr->dev, "failed to enumerate SPI slaves\n"); in acpi_register_spi_devices()
2936 * spi_target_abort - abort the ongoing transfer request on an SPI slave
2942 struct spi_controller *ctlr = spi->controller; in spi_target_abort()
2944 if (spi_controller_is_target(ctlr) && ctlr->target_abort) in spi_target_abort()
2945 return ctlr->target_abort(ctlr); in spi_target_abort()
2947 return -ENOTSUPP; in spi_target_abort()
2959 child = device_find_any_child(&ctlr->dev); in slave_show()
2960 ret = sysfs_emit(buf, "%s\n", child ? to_spi_device(child)->modalias : NULL); in slave_show()
2978 return -EINVAL; in slave_store()
2980 child = device_find_any_child(&ctlr->dev); in slave_store()
2991 return -ENOMEM; in slave_store()
2993 strscpy(spi->modalias, name, sizeof(spi->modalias)); in slave_store()
3032 * __spi_alloc_controller - allocate an SPI master or slave controller
3034 * @size: how much zeroed driver-private data to allocate; the pointer to this
3069 device_initialize(&ctlr->dev); in __spi_alloc_controller()
3070 INIT_LIST_HEAD(&ctlr->queue); in __spi_alloc_controller()
3071 spin_lock_init(&ctlr->queue_lock); in __spi_alloc_controller()
3072 spin_lock_init(&ctlr->bus_lock_spinlock); in __spi_alloc_controller()
3073 mutex_init(&ctlr->bus_lock_mutex); in __spi_alloc_controller()
3074 mutex_init(&ctlr->io_mutex); in __spi_alloc_controller()
3075 mutex_init(&ctlr->add_lock); in __spi_alloc_controller()
3076 ctlr->bus_num = -1; in __spi_alloc_controller()
3077 ctlr->num_chipselect = 1; in __spi_alloc_controller()
3078 ctlr->slave = slave; in __spi_alloc_controller()
3080 ctlr->dev.class = &spi_slave_class; in __spi_alloc_controller()
3082 ctlr->dev.class = &spi_master_class; in __spi_alloc_controller()
3083 ctlr->dev.parent = dev; in __spi_alloc_controller()
3084 pm_suspend_ignore_children(&ctlr->dev, true); in __spi_alloc_controller()
3097 * __devm_spi_alloc_controller - resource-managed __spi_alloc_controller()
3099 * @size: how much zeroed driver-private data to allocate
3124 ctlr->devm_allocated = true; in __devm_spi_alloc_controller()
3136 * spi_get_gpio_descs() - grab chip select GPIOs for the master
3137 * @ctlr: The SPI master to grab GPIO descriptors for
3143 struct device *dev = &ctlr->dev; in spi_get_gpio_descs()
3150 if (nb == -ENOENT) in spi_get_gpio_descs()
3155 ctlr->num_chipselect = max_t(int, nb, ctlr->num_chipselect); in spi_get_gpio_descs()
3157 cs = devm_kcalloc(dev, ctlr->num_chipselect, sizeof(*cs), in spi_get_gpio_descs()
3160 return -ENOMEM; in spi_get_gpio_descs()
3161 ctlr->cs_gpiods = cs; in spi_get_gpio_descs()
3178 * If we find a CS GPIO, name it after the device and in spi_get_gpio_descs()
3186 return -ENOMEM; in spi_get_gpio_descs()
3192 if (ctlr->max_native_cs && i >= ctlr->max_native_cs) { in spi_get_gpio_descs()
3194 return -EINVAL; in spi_get_gpio_descs()
3199 ctlr->unused_native_cs = ffs(~native_cs_mask) - 1; in spi_get_gpio_descs()
3201 if ((ctlr->flags & SPI_CONTROLLER_GPIO_SS) && num_cs_gpios && in spi_get_gpio_descs()
3202 ctlr->max_native_cs && ctlr->unused_native_cs >= ctlr->max_native_cs) { in spi_get_gpio_descs()
3204 return -EINVAL; in spi_get_gpio_descs()
3213 * The controller may implement only the high-level SPI-memory like in spi_controller_check_ops()
3216 * If ->mem_ops or ->mem_ops->exec_op is NULL, we request that at least in spi_controller_check_ops()
3217 * one of the ->transfer_xxx() method be implemented. in spi_controller_check_ops()
3219 if (!ctlr->mem_ops || !ctlr->mem_ops->exec_op) { in spi_controller_check_ops()
3220 if (!ctlr->transfer && !ctlr->transfer_one && in spi_controller_check_ops()
3221 !ctlr->transfer_one_message) { in spi_controller_check_ops()
3222 return -EINVAL; in spi_controller_check_ops()
3238 return id == -ENOSPC ? -EBUSY : id; in spi_controller_id_alloc()
3239 ctlr->bus_num = id; in spi_controller_id_alloc()
3244 * spi_register_controller - register SPI host or target controller
3249 * SPI controllers connect to their drivers using some non-SPI bus,
3254 * and board-specific addressing for SPI devices combines those numbers
3268 struct device *dev = ctlr->dev.parent; in spi_register_controller()
3275 return -ENODEV; in spi_register_controller()
3285 if (ctlr->bus_num < 0) in spi_register_controller()
3286 ctlr->bus_num = of_alias_get_id(ctlr->dev.of_node, "spi"); in spi_register_controller()
3287 if (ctlr->bus_num >= 0) { in spi_register_controller()
3288 /* Devices with a fixed bus num must check-in with the num */ in spi_register_controller()
3289 status = spi_controller_id_alloc(ctlr, ctlr->bus_num, ctlr->bus_num + 1); in spi_register_controller()
3293 if (ctlr->bus_num < 0) { in spi_register_controller()
3304 ctlr->bus_lock_flag = 0; in spi_register_controller()
3305 init_completion(&ctlr->xfer_completion); in spi_register_controller()
3306 init_completion(&ctlr->cur_msg_completion); in spi_register_controller()
3307 if (!ctlr->max_dma_len) in spi_register_controller()
3308 ctlr->max_dma_len = INT_MAX; in spi_register_controller()
3314 dev_set_name(&ctlr->dev, "spi%u", ctlr->bus_num); in spi_register_controller()
3316 if (!spi_controller_is_target(ctlr) && ctlr->use_gpio_descriptors) { in spi_register_controller()
3321 * A controller using GPIO descriptors always in spi_register_controller()
3324 ctlr->mode_bits |= SPI_CS_HIGH; in spi_register_controller()
3328 * Even if it's just one always-selected device, there must in spi_register_controller()
3331 if (!ctlr->num_chipselect) { in spi_register_controller()
3332 status = -EINVAL; in spi_register_controller()
3338 ctlr->last_cs[idx] = SPI_INVALID_CS; in spi_register_controller()
3340 status = device_add(&ctlr->dev); in spi_register_controller()
3345 dev_name(&ctlr->dev)); in spi_register_controller()
3349 * need the queueing logic if the driver is only supporting high-level in spi_register_controller()
3352 if (ctlr->transfer) { in spi_register_controller()
3354 } else if (ctlr->transfer_one || ctlr->transfer_one_message) { in spi_register_controller()
3357 device_del(&ctlr->dev); in spi_register_controller()
3362 ctlr->pcpu_statistics = spi_alloc_pcpu_stats(dev); in spi_register_controller()
3363 if (!ctlr->pcpu_statistics) { in spi_register_controller()
3364 dev_err(dev, "Error allocating per-cpu statistics\n"); in spi_register_controller()
3365 status = -ENOMEM; in spi_register_controller()
3370 list_add_tail(&ctlr->list, &spi_controller_list); in spi_register_controller()
3372 spi_match_controller_to_boardinfo(ctlr, &bi->board_info); in spi_register_controller()
3384 idr_remove(&spi_master_idr, ctlr->bus_num); in spi_register_controller()
3396 * devm_spi_register_controller - register managed SPI host or target
3416 return -ENOMEM; in devm_spi_register_controller()
3437 * spi_unregister_controller - unregister SPI master or slave controller
3451 int id = ctlr->bus_num; in spi_unregister_controller()
3455 mutex_lock(&ctlr->add_lock); in spi_unregister_controller()
3457 device_for_each_child(&ctlr->dev, NULL, __unregister); in spi_unregister_controller()
3463 if (ctlr->queued) { in spi_unregister_controller()
3465 dev_err(&ctlr->dev, "queue remove failed\n"); in spi_unregister_controller()
3468 list_del(&ctlr->list); in spi_unregister_controller()
3471 device_del(&ctlr->dev); in spi_unregister_controller()
3480 mutex_unlock(&ctlr->add_lock); in spi_unregister_controller()
3486 if (!ctlr->devm_allocated) in spi_unregister_controller()
3487 put_device(&ctlr->dev); in spi_unregister_controller()
3493 return ctlr->flags & SPI_CONTROLLER_SUSPENDED ? -ESHUTDOWN : 0; in __spi_check_suspended()
3498 mutex_lock(&ctlr->bus_lock_mutex); in __spi_mark_suspended()
3499 ctlr->flags |= SPI_CONTROLLER_SUSPENDED; in __spi_mark_suspended()
3500 mutex_unlock(&ctlr->bus_lock_mutex); in __spi_mark_suspended()
3505 mutex_lock(&ctlr->bus_lock_mutex); in __spi_mark_resumed()
3506 ctlr->flags &= ~SPI_CONTROLLER_SUSPENDED; in __spi_mark_resumed()
3507 mutex_unlock(&ctlr->bus_lock_mutex); in __spi_mark_resumed()
3514 /* Basically no-ops for non-queued controllers */ in spi_controller_suspend()
3515 if (ctlr->queued) { in spi_controller_suspend()
3518 dev_err(&ctlr->dev, "queue stop failed\n"); in spi_controller_suspend()
3532 if (ctlr->queued) { in spi_controller_resume()
3535 dev_err(&ctlr->dev, "queue restart failed\n"); in spi_controller_resume()
3541 /*-------------------------------------------------------------------------*/
3553 if (rxfer->release) in __spi_replace_transfers_release()
3554 rxfer->release(ctlr, msg, res); in __spi_replace_transfers_release()
3557 list_splice(&rxfer->replaced_transfers, rxfer->replaced_after); in __spi_replace_transfers_release()
3560 for (i = 0; i < rxfer->inserted; i++) in __spi_replace_transfers_release()
3561 list_del(&rxfer->inserted_transfers[i].transfer_list); in __spi_replace_transfers_release()
3565 * spi_replace_transfers - replace transfers with several transfers
3593 rxfer = spi_res_alloc(msg->spi, __spi_replace_transfers_release, in spi_replace_transfers()
3598 return ERR_PTR(-ENOMEM); in spi_replace_transfers()
3601 rxfer->release = release; in spi_replace_transfers()
3605 rxfer->extradata = in spi_replace_transfers()
3606 &rxfer->inserted_transfers[insert]; in spi_replace_transfers()
3609 INIT_LIST_HEAD(&rxfer->replaced_transfers); in spi_replace_transfers()
3613 * the @replaced_transfers - it may be spi_message.messages! in spi_replace_transfers()
3615 rxfer->replaced_after = xfer_first->transfer_list.prev; in spi_replace_transfers()
3620 * If the entry after replaced_after it is msg->transfers in spi_replace_transfers()
3624 if (rxfer->replaced_after->next == &msg->transfers) { in spi_replace_transfers()
3625 dev_err(&msg->spi->dev, in spi_replace_transfers()
3628 list_splice(&rxfer->replaced_transfers, in spi_replace_transfers()
3629 rxfer->replaced_after); in spi_replace_transfers()
3635 return ERR_PTR(-EINVAL); in spi_replace_transfers()
3642 list_move_tail(rxfer->replaced_after->next, in spi_replace_transfers()
3643 &rxfer->replaced_transfers); in spi_replace_transfers()
3652 xfer = &rxfer->inserted_transfers[insert - 1 - i]; in spi_replace_transfers()
3658 list_add(&xfer->transfer_list, rxfer->replaced_after); in spi_replace_transfers()
3662 xfer->cs_change = false; in spi_replace_transfers()
3663 xfer->delay.value = 0; in spi_replace_transfers()
3668 rxfer->inserted = insert; in spi_replace_transfers()
3687 count = DIV_ROUND_UP(xfer->len, maxsize); in __spi_split_transfer_maxsize()
3693 xfers = srt->inserted_transfers; in __spi_split_transfer_maxsize()
3718 xfers[i].len = min(maxsize, xfers[i].len - offset); in __spi_split_transfer_maxsize()
3725 *xferp = &xfers[count - 1]; in __spi_split_transfer_maxsize()
3728 SPI_STATISTICS_INCREMENT_FIELD(ctlr->pcpu_statistics, in __spi_split_transfer_maxsize()
3730 SPI_STATISTICS_INCREMENT_FIELD(msg->spi->pcpu_statistics, in __spi_split_transfer_maxsize()
3737 * spi_split_transfers_maxsize - split spi transfers into multiple transfers
3764 list_for_each_entry(xfer, &msg->transfers, transfer_list) { in spi_split_transfers_maxsize()
3765 if (xfer->len > maxsize) { in spi_split_transfers_maxsize()
3779 * spi_split_transfers_maxwords - split SPI transfers into multiple transfers
3805 list_for_each_entry(xfer, &msg->transfers, transfer_list) { in spi_split_transfers_maxwords()
3809 maxsize = maxwords * roundup_pow_of_two(BITS_TO_BYTES(xfer->bits_per_word)); in spi_split_transfers_maxwords()
3810 if (xfer->len > maxsize) { in spi_split_transfers_maxwords()
3822 /*-------------------------------------------------------------------------*/
3832 if (ctlr->bits_per_word_mask) { in __spi_validate_bits_per_word()
3835 return -EINVAL; in __spi_validate_bits_per_word()
3836 if (!(ctlr->bits_per_word_mask & SPI_BPW_MASK(bits_per_word))) in __spi_validate_bits_per_word()
3837 return -EINVAL; in __spi_validate_bits_per_word()
3844 * spi_set_cs_timing - configure CS setup, hold, and inactive delays
3851 struct device *parent = spi->controller->dev.parent; in spi_set_cs_timing()
3854 if (spi->controller->set_cs_timing && !spi_get_csgpiod(spi, 0)) { in spi_set_cs_timing()
3855 if (spi->controller->auto_runtime_pm) { in spi_set_cs_timing()
3859 dev_err(&spi->controller->dev, "Failed to power device: %d\n", in spi_set_cs_timing()
3864 status = spi->controller->set_cs_timing(spi); in spi_set_cs_timing()
3868 status = spi->controller->set_cs_timing(spi); in spi_set_cs_timing()
3875 * spi_setup - setup SPI mode and clock rate
3890 * LSB-first wire encoding, or active-high chipselects.
3903 if ((hweight_long(spi->mode & in spi_setup()
3905 (hweight_long(spi->mode & in spi_setup()
3907 dev_err(&spi->dev, in spi_setup()
3908 "setup: can not select any two of dual, quad and no-rx/tx at the same time\n"); in spi_setup()
3909 return -EINVAL; in spi_setup()
3912 if ((spi->mode & SPI_3WIRE) && (spi->mode & in spi_setup()
3915 return -EINVAL; in spi_setup()
3917 if ((spi->mode & SPI_MOSI_IDLE_LOW) && (spi->mode & SPI_MOSI_IDLE_HIGH)) { in spi_setup()
3918 dev_err(&spi->dev, in spi_setup()
3920 return -EINVAL; in spi_setup()
3928 bad_bits = spi->mode & ~(spi->controller->mode_bits | SPI_CS_WORD | in spi_setup()
3934 dev_warn(&spi->dev, in spi_setup()
3937 spi->mode &= ~ugly_bits; in spi_setup()
3941 dev_err(&spi->dev, "setup: unsupported mode bits %x\n", in spi_setup()
3943 return -EINVAL; in spi_setup()
3946 if (!spi->bits_per_word) { in spi_setup()
3947 spi->bits_per_word = 8; in spi_setup()
3950 * Some controllers may not support the default 8 bits-per-word in spi_setup()
3953 status = __spi_validate_bits_per_word(spi->controller, in spi_setup()
3954 spi->bits_per_word); in spi_setup()
3959 if (spi->controller->max_speed_hz && in spi_setup()
3960 (!spi->max_speed_hz || in spi_setup()
3961 spi->max_speed_hz > spi->controller->max_speed_hz)) in spi_setup()
3962 spi->max_speed_hz = spi->controller->max_speed_hz; in spi_setup()
3964 mutex_lock(&spi->controller->io_mutex); in spi_setup()
3966 if (spi->controller->setup) { in spi_setup()
3967 status = spi->controller->setup(spi); in spi_setup()
3969 mutex_unlock(&spi->controller->io_mutex); in spi_setup()
3970 dev_err(&spi->controller->dev, "Failed to setup device: %d\n", in spi_setup()
3978 mutex_unlock(&spi->controller->io_mutex); in spi_setup()
3982 if (spi->controller->auto_runtime_pm && spi->controller->set_cs) { in spi_setup()
3983 status = pm_runtime_resume_and_get(spi->controller->dev.parent); in spi_setup()
3985 mutex_unlock(&spi->controller->io_mutex); in spi_setup()
3986 dev_err(&spi->controller->dev, "Failed to power device: %d\n", in spi_setup()
3994 * checking for a non-zero return value instead of a negative in spi_setup()
4000 pm_runtime_mark_last_busy(spi->controller->dev.parent); in spi_setup()
4001 pm_runtime_put_autosuspend(spi->controller->dev.parent); in spi_setup()
4006 mutex_unlock(&spi->controller->io_mutex); in spi_setup()
4008 if (spi->rt && !spi->controller->rt) { in spi_setup()
4009 spi->controller->rt = true; in spi_setup()
4010 spi_set_thread_rt(spi->controller); in spi_setup()
4015 dev_dbg(&spi->dev, "setup mode %lu, %s%s%s%s%u bits/w, %u Hz max --> %d\n", in spi_setup()
4016 spi->mode & SPI_MODE_X_MASK, in spi_setup()
4017 (spi->mode & SPI_CS_HIGH) ? "cs_high, " : "", in spi_setup()
4018 (spi->mode & SPI_LSB_FIRST) ? "lsb, " : "", in spi_setup()
4019 (spi->mode & SPI_3WIRE) ? "3wire, " : "", in spi_setup()
4020 (spi->mode & SPI_LOOP) ? "loopback, " : "", in spi_setup()
4021 spi->bits_per_word, spi->max_speed_hz, in spi_setup()
4033 delay1 = spi_delay_to_ns(&xfer->word_delay, xfer); in _spi_xfer_word_delay_update()
4037 delay2 = spi_delay_to_ns(&spi->word_delay, xfer); in _spi_xfer_word_delay_update()
4042 memcpy(&xfer->word_delay, &spi->word_delay, in _spi_xfer_word_delay_update()
4043 sizeof(xfer->word_delay)); in _spi_xfer_word_delay_update()
4050 struct spi_controller *ctlr = spi->controller; in __spi_validate()
4054 if (list_empty(&message->transfers)) in __spi_validate()
4055 return -EINVAL; in __spi_validate()
4057 message->spi = spi; in __spi_validate()
4060 * Half-duplex links include original MicroWire, and ones with in __spi_validate()
4061 * only one data pin like SPI_3WIRE (switches direction) or where in __spi_validate()
4065 if ((ctlr->flags & SPI_CONTROLLER_HALF_DUPLEX) || in __spi_validate()
4066 (spi->mode & SPI_3WIRE)) { in __spi_validate()
4067 unsigned flags = ctlr->flags; in __spi_validate()
4069 list_for_each_entry(xfer, &message->transfers, transfer_list) { in __spi_validate()
4070 if (xfer->rx_buf && xfer->tx_buf) in __spi_validate()
4071 return -EINVAL; in __spi_validate()
4072 if ((flags & SPI_CONTROLLER_NO_TX) && xfer->tx_buf) in __spi_validate()
4073 return -EINVAL; in __spi_validate()
4074 if ((flags & SPI_CONTROLLER_NO_RX) && xfer->rx_buf) in __spi_validate()
4075 return -EINVAL; in __spi_validate()
4087 message->frame_length = 0; in __spi_validate()
4088 list_for_each_entry(xfer, &message->transfers, transfer_list) { in __spi_validate()
4089 xfer->effective_speed_hz = 0; in __spi_validate()
4090 message->frame_length += xfer->len; in __spi_validate()
4091 if (!xfer->bits_per_word) in __spi_validate()
4092 xfer->bits_per_word = spi->bits_per_word; in __spi_validate()
4094 if (!xfer->speed_hz) in __spi_validate()
4095 xfer->speed_hz = spi->max_speed_hz; in __spi_validate()
4097 if (ctlr->max_speed_hz && xfer->speed_hz > ctlr->max_speed_hz) in __spi_validate()
4098 xfer->speed_hz = ctlr->max_speed_hz; in __spi_validate()
4100 if (__spi_validate_bits_per_word(ctlr, xfer->bits_per_word)) in __spi_validate()
4101 return -EINVAL; in __spi_validate()
4105 * where SPI word size should be power-of-two multiple. in __spi_validate()
4107 if (xfer->bits_per_word <= 8) in __spi_validate()
4109 else if (xfer->bits_per_word <= 16) in __spi_validate()
4115 if (xfer->len % w_size) in __spi_validate()
4116 return -EINVAL; in __spi_validate()
4118 if (xfer->speed_hz && ctlr->min_speed_hz && in __spi_validate()
4119 xfer->speed_hz < ctlr->min_speed_hz) in __spi_validate()
4120 return -EINVAL; in __spi_validate()
4122 if (xfer->tx_buf && !xfer->tx_nbits) in __spi_validate()
4123 xfer->tx_nbits = SPI_NBITS_SINGLE; in __spi_validate()
4124 if (xfer->rx_buf && !xfer->rx_nbits) in __spi_validate()
4125 xfer->rx_nbits = SPI_NBITS_SINGLE; in __spi_validate()
4131 if (xfer->tx_buf) { in __spi_validate()
4132 if (spi->mode & SPI_NO_TX) in __spi_validate()
4133 return -EINVAL; in __spi_validate()
4134 if (xfer->tx_nbits != SPI_NBITS_SINGLE && in __spi_validate()
4135 xfer->tx_nbits != SPI_NBITS_DUAL && in __spi_validate()
4136 xfer->tx_nbits != SPI_NBITS_QUAD && in __spi_validate()
4137 xfer->tx_nbits != SPI_NBITS_OCTAL) in __spi_validate()
4138 return -EINVAL; in __spi_validate()
4139 if ((xfer->tx_nbits == SPI_NBITS_DUAL) && in __spi_validate()
4140 !(spi->mode & (SPI_TX_DUAL | SPI_TX_QUAD))) in __spi_validate()
4141 return -EINVAL; in __spi_validate()
4142 if ((xfer->tx_nbits == SPI_NBITS_QUAD) && in __spi_validate()
4143 !(spi->mode & SPI_TX_QUAD)) in __spi_validate()
4144 return -EINVAL; in __spi_validate()
4147 if (xfer->rx_buf) { in __spi_validate()
4148 if (spi->mode & SPI_NO_RX) in __spi_validate()
4149 return -EINVAL; in __spi_validate()
4150 if (xfer->rx_nbits != SPI_NBITS_SINGLE && in __spi_validate()
4151 xfer->rx_nbits != SPI_NBITS_DUAL && in __spi_validate()
4152 xfer->rx_nbits != SPI_NBITS_QUAD && in __spi_validate()
4153 xfer->rx_nbits != SPI_NBITS_OCTAL) in __spi_validate()
4154 return -EINVAL; in __spi_validate()
4155 if ((xfer->rx_nbits == SPI_NBITS_DUAL) && in __spi_validate()
4156 !(spi->mode & (SPI_RX_DUAL | SPI_RX_QUAD))) in __spi_validate()
4157 return -EINVAL; in __spi_validate()
4158 if ((xfer->rx_nbits == SPI_NBITS_QUAD) && in __spi_validate()
4159 !(spi->mode & SPI_RX_QUAD)) in __spi_validate()
4160 return -EINVAL; in __spi_validate()
4164 return -EINVAL; in __spi_validate()
4167 message->status = -EINPROGRESS; in __spi_validate()
4173 * spi_split_transfers - generic handling of transfer splitting
4189 struct spi_controller *ctlr = msg->spi->controller; in spi_split_transfers()
4195 * transfer (indicated by the SPI_CS_WORD flag) or we are using a GPIO in spi_split_transfers()
4196 * for the CS line, we can emulate the CS-per-word hardware function by in spi_split_transfers()
4197 * splitting transfers into one-word transfers and ensuring that in spi_split_transfers()
4200 if ((msg->spi->mode & SPI_CS_WORD) && in spi_split_transfers()
4201 (!(ctlr->mode_bits & SPI_CS_WORD) || spi_is_csgpiod(msg->spi))) { in spi_split_transfers()
4206 list_for_each_entry(xfer, &msg->transfers, transfer_list) { in spi_split_transfers()
4208 if (list_is_last(&xfer->transfer_list, &msg->transfers)) in spi_split_transfers()
4211 xfer->cs_change = 1; in spi_split_transfers()
4215 spi_max_transfer_size(msg->spi)); in spi_split_transfers()
4224 * __spi_optimize_message - shared implementation for spi_optimize_message()
4239 struct spi_controller *ctlr = spi->controller; in __spi_optimize_message()
4250 if (ctlr->optimize_message) { in __spi_optimize_message()
4251 ret = ctlr->optimize_message(msg); in __spi_optimize_message()
4258 msg->optimized = true; in __spi_optimize_message()
4264 * spi_maybe_optimize_message - optimize message if it isn't already pre-optimized
4272 if (spi->controller->defer_optimize_message) { in spi_maybe_optimize_message()
4273 msg->spi = spi; in spi_maybe_optimize_message()
4277 if (msg->pre_optimized) in spi_maybe_optimize_message()
4284 * spi_optimize_message - do any one-time validation and setup for a SPI message
4294 * of updating the contents of any xfer->tx_buf (the pointer can't be changed,
4308 * Pre-optimization is not supported and optimization is deferred e.g. in spi_optimize_message()
4309 * when using spi-mux. in spi_optimize_message()
4311 if (spi->controller->defer_optimize_message) in spi_optimize_message()
4324 msg->pre_optimized = true; in spi_optimize_message()
4331 * spi_unoptimize_message - releases any resources allocated by spi_optimize_message()
4340 if (msg->spi->controller->defer_optimize_message) in spi_unoptimize_message()
4344 msg->pre_optimized = false; in spi_unoptimize_message()
4350 struct spi_controller *ctlr = spi->controller; in __spi_async()
4357 if (!ctlr->transfer) in __spi_async()
4358 return -ENOTSUPP; in __spi_async()
4360 SPI_STATISTICS_INCREMENT_FIELD(ctlr->pcpu_statistics, spi_async); in __spi_async()
4361 SPI_STATISTICS_INCREMENT_FIELD(spi->pcpu_statistics, spi_async); in __spi_async()
4365 if (!ctlr->ptp_sts_supported) { in __spi_async()
4366 list_for_each_entry(xfer, &message->transfers, transfer_list) { in __spi_async()
4367 xfer->ptp_sts_word_pre = 0; in __spi_async()
4368 ptp_read_system_prets(xfer->ptp_sts); in __spi_async()
4372 return ctlr->transfer(spi, message); in __spi_async()
4381 * devm_spi_optimize_message - managed version of spi_optimize_message()
4382 * @dev: the device that manages @msg (usually @spi->dev)
4404 * spi_async - asynchronous SPI transfer
4413 * Before that invocation, the value of message->status is undefined.
4414 * When the callback is issued, message->status holds either zero (to
4436 struct spi_controller *ctlr = spi->controller; in spi_async()
4444 spin_lock_irqsave(&ctlr->bus_lock_spinlock, flags); in spi_async()
4446 if (ctlr->bus_lock_flag) in spi_async()
4447 ret = -EBUSY; in spi_async()
4451 spin_unlock_irqrestore(&ctlr->bus_lock_spinlock, flags); in spi_async()
4462 mutex_lock(&ctlr->io_mutex); in __spi_transfer_message_noqueue()
4464 was_busy = ctlr->busy; in __spi_transfer_message_noqueue()
4466 ctlr->cur_msg = msg; in __spi_transfer_message_noqueue()
4469 dev_err(&ctlr->dev, "noqueue transfer failed\n"); in __spi_transfer_message_noqueue()
4470 ctlr->cur_msg = NULL; in __spi_transfer_message_noqueue()
4471 ctlr->fallback = false; in __spi_transfer_message_noqueue()
4474 kfree(ctlr->dummy_rx); in __spi_transfer_message_noqueue()
4475 ctlr->dummy_rx = NULL; in __spi_transfer_message_noqueue()
4476 kfree(ctlr->dummy_tx); in __spi_transfer_message_noqueue()
4477 ctlr->dummy_tx = NULL; in __spi_transfer_message_noqueue()
4478 if (ctlr->unprepare_transfer_hardware && in __spi_transfer_message_noqueue()
4479 ctlr->unprepare_transfer_hardware(ctlr)) in __spi_transfer_message_noqueue()
4480 dev_err(&ctlr->dev, in __spi_transfer_message_noqueue()
4485 mutex_unlock(&ctlr->io_mutex); in __spi_transfer_message_noqueue()
4488 /*-------------------------------------------------------------------------*/
4506 struct spi_controller *ctlr = spi->controller; in __spi_sync()
4509 dev_warn_once(&spi->dev, "Attempted to sync while suspend\n"); in __spi_sync()
4510 return -ESHUTDOWN; in __spi_sync()
4517 SPI_STATISTICS_INCREMENT_FIELD(ctlr->pcpu_statistics, spi_sync); in __spi_sync()
4518 SPI_STATISTICS_INCREMENT_FIELD(spi->pcpu_statistics, spi_sync); in __spi_sync()
4526 if (READ_ONCE(ctlr->queue_empty) && !ctlr->must_async) { in __spi_sync()
4527 message->actual_length = 0; in __spi_sync()
4528 message->status = -EINPROGRESS; in __spi_sync()
4532 SPI_STATISTICS_INCREMENT_FIELD(ctlr->pcpu_statistics, spi_sync_immediate); in __spi_sync()
4533 SPI_STATISTICS_INCREMENT_FIELD(spi->pcpu_statistics, spi_sync_immediate); in __spi_sync()
4537 return message->status; in __spi_sync()
4546 message->complete = spi_complete; in __spi_sync()
4547 message->context = &done; in __spi_sync()
4549 spin_lock_irqsave(&ctlr->bus_lock_spinlock, flags); in __spi_sync()
4551 spin_unlock_irqrestore(&ctlr->bus_lock_spinlock, flags); in __spi_sync()
4555 status = message->status; in __spi_sync()
4557 message->complete = NULL; in __spi_sync()
4558 message->context = NULL; in __spi_sync()
4564 * spi_sync - blocking/synchronous SPI data transfers
4570 * is non-interruptible, and has no timeout. Low-overhead controller
4575 * frequently-used devices may want to minimize costs of selecting a chip,
4588 mutex_lock(&spi->controller->bus_lock_mutex); in spi_sync()
4590 mutex_unlock(&spi->controller->bus_lock_mutex); in spi_sync()
4597 * spi_sync_locked - version of spi_sync with exclusive bus usage
4603 * is non-interruptible, and has no timeout. Low-overhead controller
4619 * spi_bus_lock - obtain a lock for exclusive SPI bus usage
4624 * is non-interruptible, and has no timeout.
4637 mutex_lock(&ctlr->bus_lock_mutex); in spi_bus_lock()
4639 spin_lock_irqsave(&ctlr->bus_lock_spinlock, flags); in spi_bus_lock()
4640 ctlr->bus_lock_flag = 1; in spi_bus_lock()
4641 spin_unlock_irqrestore(&ctlr->bus_lock_spinlock, flags); in spi_bus_lock()
4650 * spi_bus_unlock - release the lock for exclusive SPI bus usage
4655 * is non-interruptible, and has no timeout.
4664 ctlr->bus_lock_flag = 0; in spi_bus_unlock()
4666 mutex_unlock(&ctlr->bus_lock_mutex); in spi_bus_unlock()
4678 * spi_write_then_read - SPI synchronous write followed by read
4680 * @txbuf: data to be written (need not be DMA-safe)
4682 * @rxbuf: buffer into which data will be read (need not be DMA-safe)
4692 * Performance-sensitive or bulk transfer code should instead use
4693 * spi_{async,sync}() calls with DMA-safe buffers.
4709 * Use preallocated DMA-safe buffer if we can. We can't avoid in spi_write_then_read()
4712 * using the pre-allocated buffer or the transfer is too large. in spi_write_then_read()
4718 return -ENOMEM; in spi_write_then_read()
4752 /*-------------------------------------------------------------------------*/
4787 ctlr = of_find_spi_controller_by_node(rd->dn->parent); in of_spi_notify()
4791 if (of_node_test_and_set_flag(rd->dn, OF_POPULATED)) { in of_spi_notify()
4792 put_device(&ctlr->dev); in of_spi_notify()
4800 rd->dn->fwnode.flags &= ~FWNODE_FLAG_NOT_DEVICE; in of_spi_notify()
4801 spi = of_register_spi_device(ctlr, rd->dn); in of_spi_notify()
4802 put_device(&ctlr->dev); in of_spi_notify()
4806 __func__, rd->dn); in of_spi_notify()
4807 of_node_clear_flag(rd->dn, OF_POPULATED); in of_spi_notify()
4814 if (!of_node_check_flag(rd->dn, OF_POPULATED)) in of_spi_notify()
4818 spi = of_find_spi_device_by_node(rd->dn); in of_spi_notify()
4826 put_device(&spi->dev); in of_spi_notify()
4843 return device_match_acpi_dev(dev->parent, data); in spi_acpi_controller_match()
4884 put_device(&ctlr->dev); in acpi_spi_notify()
4895 put_device(&spi->dev); in acpi_spi_notify()
4915 status = -ENOMEM; in spi_init()