Lines Matching +full:master +full:- +full:mode
1 // SPDX-License-Identifier: GPL-2.0-only
3 * Driver for the Diolan DLN-2 USB-SPI adapter
81 struct spi_master *master; member
93 u16 mode; member
110 tx.port = dln2->port; in dln2_spi_enable()
114 len -= sizeof(tx.wait_for_completion); in dln2_spi_enable()
120 return dln2_transfer_tx(dln2->pdev, cmd, &tx, len); in dln2_spi_enable()
128 * Ex: cs_mask = 0x03 -> CS0 & CS1 will be selected and the next WR/RD operation
138 tx.port = dln2->port; in dln2_spi_cs_set()
147 return dln2_transfer_tx(dln2->pdev, DLN2_SPI_SET_SS, &tx, sizeof(tx)); in dln2_spi_cs_set()
151 * Select one CS line. The other lines will be un-selected.
169 tx.port = dln2->port; in dln2_spi_cs_enable()
173 return dln2_transfer_tx(dln2->pdev, cmd, &tx, sizeof(tx)); in dln2_spi_cs_enable()
178 u8 cs_mask = GENMASK(dln2->master->num_chipselect - 1, 0); in dln2_spi_cs_enable_all()
194 tx.port = dln2->port; in dln2_spi_get_cs_num()
195 ret = dln2_transfer(dln2->pdev, DLN2_SPI_GET_SS_COUNT, &tx, sizeof(tx), in dln2_spi_get_cs_num()
200 return -EPROTO; in dln2_spi_get_cs_num()
204 dev_dbg(&dln2->pdev->dev, "cs_num = %d\n", *cs_num); in dln2_spi_get_cs_num()
220 tx.port = dln2->port; in dln2_spi_get_speed()
222 ret = dln2_transfer(dln2->pdev, cmd, &tx, sizeof(tx), &rx, &rx_len); in dln2_spi_get_speed()
226 return -EPROTO; in dln2_spi_get_speed()
248 dev_dbg(&dln2->pdev->dev, "freq_min = %d, freq_max = %d\n", in dln2_spi_get_speed_range()
270 tx.port = dln2->port; in dln2_spi_set_speed()
273 ret = dln2_transfer(dln2->pdev, DLN2_SPI_SET_FREQUENCY, &tx, sizeof(tx), in dln2_spi_set_speed()
278 return -EPROTO; in dln2_spi_set_speed()
286 static int dln2_spi_set_mode(struct dln2_spi *dln2, u8 mode) in dln2_spi_set_mode() argument
290 u8 mode; in dln2_spi_set_mode() member
293 tx.port = dln2->port; in dln2_spi_set_mode()
294 tx.mode = mode; in dln2_spi_set_mode()
296 return dln2_transfer_tx(dln2->pdev, DLN2_SPI_SET_MODE, &tx, sizeof(tx)); in dln2_spi_set_mode()
309 tx.port = dln2->port; in dln2_spi_set_bpw()
312 return dln2_transfer_tx(dln2->pdev, DLN2_SPI_SET_FRAME_SIZE, in dln2_spi_set_bpw()
326 } *rx = dln2->buf; in dln2_spi_get_supported_frame_sizes()
330 tx.port = dln2->port; in dln2_spi_get_supported_frame_sizes()
332 ret = dln2_transfer(dln2->pdev, DLN2_SPI_GET_SUPPORTED_FRAME_SIZES, in dln2_spi_get_supported_frame_sizes()
337 return -EPROTO; in dln2_spi_get_supported_frame_sizes()
338 if (rx->count > ARRAY_SIZE(rx->frame_sizes)) in dln2_spi_get_supported_frame_sizes()
339 return -EPROTO; in dln2_spi_get_supported_frame_sizes()
342 for (i = 0; i < rx->count; i++) in dln2_spi_get_supported_frame_sizes()
343 *bpw_mask |= BIT(rx->frame_sizes[i] - 1); in dln2_spi_get_supported_frame_sizes()
345 dev_dbg(&dln2->pdev->dev, "bpw_mask = 0x%X\n", *bpw_mask); in dln2_spi_get_supported_frame_sizes()
367 while (len--) in dln2_spi_copy_to_buf()
374 while (len--) in dln2_spi_copy_to_buf()
400 while (len--) in dln2_spi_copy_from_buf()
407 while (len--) in dln2_spi_copy_from_buf()
426 } __packed *tx = dln2->buf; in dln2_spi_write_one()
432 return -EINVAL; in dln2_spi_write_one()
434 tx->port = dln2->port; in dln2_spi_write_one()
435 tx->size = cpu_to_le16(data_len); in dln2_spi_write_one()
436 tx->attr = attr; in dln2_spi_write_one()
438 dln2_spi_copy_to_buf(tx->buf, data, data_len, dln2->bpw); in dln2_spi_write_one()
440 tx_len = sizeof(*tx) + data_len - DLN2_SPI_MAX_XFER_SIZE; in dln2_spi_write_one()
441 return dln2_transfer_tx(dln2->pdev, DLN2_SPI_WRITE, tx, tx_len); in dln2_spi_write_one()
459 } __packed *rx = dln2->buf; in dln2_spi_read_one()
465 return -EINVAL; in dln2_spi_read_one()
467 tx.port = dln2->port; in dln2_spi_read_one()
471 ret = dln2_transfer(dln2->pdev, DLN2_SPI_READ, &tx, sizeof(tx), in dln2_spi_read_one()
475 if (rx_len < sizeof(rx->size) + data_len) in dln2_spi_read_one()
476 return -EPROTO; in dln2_spi_read_one()
477 if (le16_to_cpu(rx->size) != data_len) in dln2_spi_read_one()
478 return -EPROTO; in dln2_spi_read_one()
480 dln2_spi_copy_from_buf(data, rx->buf, data_len, dln2->bpw); in dln2_spi_read_one()
508 return -EINVAL; in dln2_spi_read_write_one()
511 * Since this is a pseudo full-duplex communication, we're perfectly in dln2_spi_read_write_one()
515 tx = dln2->buf; in dln2_spi_read_write_one()
516 rx = dln2->buf; in dln2_spi_read_write_one()
518 tx->port = dln2->port; in dln2_spi_read_write_one()
519 tx->size = cpu_to_le16(data_len); in dln2_spi_read_write_one()
520 tx->attr = attr; in dln2_spi_read_write_one()
522 dln2_spi_copy_to_buf(tx->buf, tx_data, data_len, dln2->bpw); in dln2_spi_read_write_one()
524 tx_len = sizeof(*tx) + data_len - DLN2_SPI_MAX_XFER_SIZE; in dln2_spi_read_write_one()
527 ret = dln2_transfer(dln2->pdev, DLN2_SPI_READ_WRITE, tx, tx_len, in dln2_spi_read_write_one()
531 if (rx_len < sizeof(rx->size) + data_len) in dln2_spi_read_write_one()
532 return -EPROTO; in dln2_spi_read_write_one()
533 if (le16_to_cpu(rx->size) != data_len) in dln2_spi_read_write_one()
534 return -EPROTO; in dln2_spi_read_write_one()
536 dln2_spi_copy_from_buf(rx_data, rx->buf, data_len, dln2->bpw); in dln2_spi_read_write_one()
562 offset = data_len - remaining; in dln2_spi_rdwr()
578 return -EINVAL; in dln2_spi_rdwr()
584 remaining -= len; in dln2_spi_rdwr()
590 static int dln2_spi_prepare_message(struct spi_master *master, in dln2_spi_prepare_message() argument
594 struct dln2_spi *dln2 = spi_master_get_devdata(master); in dln2_spi_prepare_message()
595 struct spi_device *spi = message->spi; in dln2_spi_prepare_message()
597 if (dln2->cs != spi->chip_select) { in dln2_spi_prepare_message()
598 ret = dln2_spi_cs_set_one(dln2, spi->chip_select); in dln2_spi_prepare_message()
602 dln2->cs = spi->chip_select; in dln2_spi_prepare_message()
609 u8 bpw, u8 mode) in dln2_spi_transfer_setup() argument
614 bus_setup_change = dln2->speed != speed || dln2->mode != mode || in dln2_spi_transfer_setup()
615 dln2->bpw != bpw; in dln2_spi_transfer_setup()
624 if (dln2->speed != speed) { in dln2_spi_transfer_setup()
629 dln2->speed = speed; in dln2_spi_transfer_setup()
632 if (dln2->mode != mode) { in dln2_spi_transfer_setup()
633 ret = dln2_spi_set_mode(dln2, mode & 0x3); in dln2_spi_transfer_setup()
637 dln2->mode = mode; in dln2_spi_transfer_setup()
640 if (dln2->bpw != bpw) { in dln2_spi_transfer_setup()
645 dln2->bpw = bpw; in dln2_spi_transfer_setup()
651 static int dln2_spi_transfer_one(struct spi_master *master, in dln2_spi_transfer_one() argument
655 struct dln2_spi *dln2 = spi_master_get_devdata(master); in dln2_spi_transfer_one()
659 status = dln2_spi_transfer_setup(dln2, xfer->speed_hz, in dln2_spi_transfer_one()
660 xfer->bits_per_word, in dln2_spi_transfer_one()
661 spi->mode); in dln2_spi_transfer_one()
663 dev_err(&dln2->pdev->dev, "Cannot setup transfer\n"); in dln2_spi_transfer_one()
667 if (!xfer->cs_change && !spi_transfer_is_last(master, xfer)) in dln2_spi_transfer_one()
670 status = dln2_spi_rdwr(dln2, xfer->tx_buf, xfer->rx_buf, in dln2_spi_transfer_one()
671 xfer->len, attr); in dln2_spi_transfer_one()
673 dev_err(&dln2->pdev->dev, "write/read failed!\n"); in dln2_spi_transfer_one()
680 struct spi_master *master; in dln2_spi_probe() local
682 struct dln2_platform_data *pdata = dev_get_platdata(&pdev->dev); in dln2_spi_probe()
683 struct device *dev = &pdev->dev; in dln2_spi_probe()
686 master = spi_alloc_master(&pdev->dev, sizeof(*dln2)); in dln2_spi_probe()
687 if (!master) in dln2_spi_probe()
688 return -ENOMEM; in dln2_spi_probe()
690 platform_set_drvdata(pdev, master); in dln2_spi_probe()
692 dln2 = spi_master_get_devdata(master); in dln2_spi_probe()
694 dln2->buf = devm_kmalloc(&pdev->dev, DLN2_SPI_BUF_SIZE, GFP_KERNEL); in dln2_spi_probe()
695 if (!dln2->buf) { in dln2_spi_probe()
696 ret = -ENOMEM; in dln2_spi_probe()
700 dln2->master = master; in dln2_spi_probe()
701 dln2->master->dev.of_node = dev->of_node; in dln2_spi_probe()
702 dln2->pdev = pdev; in dln2_spi_probe()
703 dln2->port = pdata->port; in dln2_spi_probe()
704 /* cs/mode can never be 0xff, so the first transfer will set them */ in dln2_spi_probe()
705 dln2->cs = 0xff; in dln2_spi_probe()
706 dln2->mode = 0xff; in dln2_spi_probe()
711 dev_err(&pdev->dev, "Failed to disable SPI module\n"); in dln2_spi_probe()
715 ret = dln2_spi_get_cs_num(dln2, &master->num_chipselect); in dln2_spi_probe()
717 dev_err(&pdev->dev, "Failed to get number of CS pins\n"); in dln2_spi_probe()
722 &master->min_speed_hz, in dln2_spi_probe()
723 &master->max_speed_hz); in dln2_spi_probe()
725 dev_err(&pdev->dev, "Failed to read bus min/max freqs\n"); in dln2_spi_probe()
730 &master->bits_per_word_mask); in dln2_spi_probe()
732 dev_err(&pdev->dev, "Failed to read supported frame sizes\n"); in dln2_spi_probe()
738 dev_err(&pdev->dev, "Failed to enable CS pins\n"); in dln2_spi_probe()
742 master->bus_num = -1; in dln2_spi_probe()
743 master->mode_bits = SPI_CPOL | SPI_CPHA; in dln2_spi_probe()
744 master->prepare_message = dln2_spi_prepare_message; in dln2_spi_probe()
745 master->transfer_one = dln2_spi_transfer_one; in dln2_spi_probe()
746 master->auto_runtime_pm = true; in dln2_spi_probe()
751 dev_err(&pdev->dev, "Failed to enable SPI module\n"); in dln2_spi_probe()
755 pm_runtime_set_autosuspend_delay(&pdev->dev, in dln2_spi_probe()
757 pm_runtime_use_autosuspend(&pdev->dev); in dln2_spi_probe()
758 pm_runtime_set_active(&pdev->dev); in dln2_spi_probe()
759 pm_runtime_enable(&pdev->dev); in dln2_spi_probe()
761 ret = devm_spi_register_master(&pdev->dev, master); in dln2_spi_probe()
763 dev_err(&pdev->dev, "Failed to register master\n"); in dln2_spi_probe()
770 pm_runtime_disable(&pdev->dev); in dln2_spi_probe()
771 pm_runtime_set_suspended(&pdev->dev); in dln2_spi_probe()
774 dev_err(&pdev->dev, "Failed to disable SPI module\n"); in dln2_spi_probe()
776 spi_master_put(master); in dln2_spi_probe()
783 struct spi_master *master = platform_get_drvdata(pdev); in dln2_spi_remove() local
784 struct dln2_spi *dln2 = spi_master_get_devdata(master); in dln2_spi_remove()
786 pm_runtime_disable(&pdev->dev); in dln2_spi_remove()
789 dev_err(&pdev->dev, "Failed to disable SPI module\n"); in dln2_spi_remove()
798 struct spi_master *master = dev_get_drvdata(dev); in dln2_spi_suspend() local
799 struct dln2_spi *dln2 = spi_master_get_devdata(master); in dln2_spi_suspend()
801 ret = spi_master_suspend(master); in dln2_spi_suspend()
815 dln2->cs = 0xff; in dln2_spi_suspend()
816 dln2->speed = 0; in dln2_spi_suspend()
817 dln2->bpw = 0; in dln2_spi_suspend()
818 dln2->mode = 0xff; in dln2_spi_suspend()
826 struct spi_master *master = dev_get_drvdata(dev); in dln2_spi_resume() local
827 struct dln2_spi *dln2 = spi_master_get_devdata(master); in dln2_spi_resume()
839 return spi_master_resume(master); in dln2_spi_resume()
846 struct spi_master *master = dev_get_drvdata(dev); in dln2_spi_runtime_suspend() local
847 struct dln2_spi *dln2 = spi_master_get_devdata(master); in dln2_spi_runtime_suspend()
854 struct spi_master *master = dev_get_drvdata(dev); in dln2_spi_runtime_resume() local
855 struct dln2_spi *dln2 = spi_master_get_devdata(master); in dln2_spi_runtime_resume()
869 .name = "dln2-spi",
877 MODULE_DESCRIPTION("Driver for the Diolan DLN2 SPI master interface");
880 MODULE_ALIAS("platform:dln2-spi");