Lines Matching full:mcspi
3 * OMAP2 McSPI controller driver
30 #include <linux/platform_data/spi-omap2-mcspi.h>
149 struct omap2_mcspi *mcspi = spi_controller_get_devdata(ctlr); in mcspi_write_reg() local
151 writel_relaxed(val, mcspi->base + idx); in mcspi_write_reg()
156 struct omap2_mcspi *mcspi = spi_controller_get_devdata(ctlr); in mcspi_read_reg() local
158 return readl_relaxed(mcspi->base + idx); in mcspi_read_reg()
240 struct omap2_mcspi *mcspi = spi_controller_get_devdata(spi->controller); in omap2_mcspi_set_cs() local
251 int err = pm_runtime_resume_and_get(mcspi->dev); in omap2_mcspi_set_cs()
253 dev_err(mcspi->dev, "failed to get sync: %d\n", err); in omap2_mcspi_set_cs()
266 pm_runtime_mark_last_busy(mcspi->dev); in omap2_mcspi_set_cs()
267 pm_runtime_put_autosuspend(mcspi->dev); in omap2_mcspi_set_cs()
273 struct omap2_mcspi *mcspi = spi_controller_get_devdata(ctlr); in omap2_mcspi_set_mode() local
274 struct omap2_mcspi_regs *ctx = &mcspi->ctx; in omap2_mcspi_set_mode()
298 struct omap2_mcspi *mcspi; in omap2_mcspi_set_fifo() local
303 mcspi = spi_controller_get_devdata(ctlr); in omap2_mcspi_set_fifo()
333 mcspi->fifo_depth = max_fifo_depth; in omap2_mcspi_set_fifo()
346 mcspi->fifo_depth = 0; in omap2_mcspi_set_fifo()
366 static int mcspi_wait_for_completion(struct omap2_mcspi *mcspi, in mcspi_wait_for_completion() argument
369 if (spi_controller_is_target(mcspi->ctlr)) { in mcspi_wait_for_completion()
371 mcspi->target_aborted) in mcspi_wait_for_completion()
383 struct omap2_mcspi *mcspi = spi_controller_get_devdata(spi->controller); in omap2_mcspi_rx_callback() local
384 struct omap2_mcspi_dma *mcspi_dma = &mcspi->dma_channels[spi_get_chipselect(spi, 0)]; in omap2_mcspi_rx_callback()
395 struct omap2_mcspi *mcspi = spi_controller_get_devdata(spi->controller); in omap2_mcspi_tx_callback() local
396 struct omap2_mcspi_dma *mcspi_dma = &mcspi->dma_channels[spi_get_chipselect(spi, 0)]; in omap2_mcspi_tx_callback()
408 struct omap2_mcspi *mcspi; in omap2_mcspi_tx_dma() local
412 mcspi = spi_controller_get_devdata(spi->controller); in omap2_mcspi_tx_dma()
413 mcspi_dma = &mcspi->dma_channels[spi_get_chipselect(spi, 0)]; in omap2_mcspi_tx_dma()
437 struct omap2_mcspi *mcspi; in omap2_mcspi_rx_dma() local
450 mcspi = spi_controller_get_devdata(spi->controller); in omap2_mcspi_rx_dma()
451 mcspi_dma = &mcspi->dma_channels[spi_get_chipselect(spi, 0)]; in omap2_mcspi_rx_dma()
459 if (mcspi->fifo_depth == 0) in omap2_mcspi_rx_dma()
476 * Reduce DMA transfer length by one more if McSPI is in omap2_mcspi_rx_dma()
479 if ((l & OMAP2_MCSPI_CHCONF_TURBO) && mcspi->fifo_depth == 0) in omap2_mcspi_rx_dma()
518 ret = mcspi_wait_for_completion(mcspi, &mcspi_dma->dma_rx_completion); in omap2_mcspi_rx_dma()
519 if (ret || mcspi->target_aborted) { in omap2_mcspi_rx_dma()
528 if (mcspi->fifo_depth > 0) in omap2_mcspi_rx_dma()
582 struct omap2_mcspi *mcspi; in omap2_mcspi_txrx_dma() local
595 mcspi = spi_controller_get_devdata(spi->controller); in omap2_mcspi_txrx_dma()
596 mcspi_dma = &mcspi->dma_channels[spi_get_chipselect(spi, 0)]; in omap2_mcspi_txrx_dma()
622 mcspi->target_aborted = false; in omap2_mcspi_txrx_dma()
625 reinit_completion(&mcspi->txdone); in omap2_mcspi_txrx_dma()
641 ret = mcspi_wait_for_completion(mcspi, &mcspi_dma->dma_tx_completion); in omap2_mcspi_txrx_dma()
642 if (ret || mcspi->target_aborted) { in omap2_mcspi_txrx_dma()
648 if (spi_controller_is_target(mcspi->ctlr)) { in omap2_mcspi_txrx_dma()
649 ret = mcspi_wait_for_completion(mcspi, &mcspi->txdone); in omap2_mcspi_txrx_dma()
650 if (ret || mcspi->target_aborted) in omap2_mcspi_txrx_dma()
654 if (mcspi->fifo_depth > 0) { in omap2_mcspi_txrx_dma()
655 irqstat_reg = mcspi->base + OMAP2_MCSPI_IRQSTATUS; in omap2_mcspi_txrx_dma()
661 mcspi_write_reg(mcspi->ctlr, OMAP2_MCSPI_IRQSTATUS, in omap2_mcspi_txrx_dma()
668 if (mcspi->fifo_depth > 0) { in omap2_mcspi_txrx_dma()
901 struct omap2_mcspi *mcspi; in omap2_mcspi_setup_transfer() local
906 mcspi = spi_controller_get_devdata(spi->controller); in omap2_mcspi_setup_transfer()
916 ref_clk_hz = mcspi->ref_clk_hz; in omap2_mcspi_setup_transfer()
935 if (mcspi->pin_dir == MCSPI_PINDIR_D0_IN_D1_OUT) { in omap2_mcspi_setup_transfer()
994 static int omap2_mcspi_request_dma(struct omap2_mcspi *mcspi, in omap2_mcspi_request_dma() argument
999 mcspi_dma->dma_rx = dma_request_chan(mcspi->dev, in omap2_mcspi_request_dma()
1007 mcspi_dma->dma_tx = dma_request_chan(mcspi->dev, in omap2_mcspi_request_dma()
1025 struct omap2_mcspi *mcspi = spi_controller_get_devdata(ctlr); in omap2_mcspi_release_dma() local
1030 mcspi_dma = &mcspi->dma_channels[i]; in omap2_mcspi_release_dma()
1060 struct omap2_mcspi *mcspi = spi_controller_get_devdata(spi->controller); in omap2_mcspi_setup() local
1061 struct omap2_mcspi_regs *ctx = &mcspi->ctx; in omap2_mcspi_setup()
1068 cs->base = mcspi->base + spi_get_chipselect(spi, 0) * 0x14; in omap2_mcspi_setup()
1069 cs->phys = mcspi->phys + spi_get_chipselect(spi, 0) * 0x14; in omap2_mcspi_setup()
1079 ret = pm_runtime_resume_and_get(mcspi->dev); in omap2_mcspi_setup()
1091 pm_runtime_mark_last_busy(mcspi->dev); in omap2_mcspi_setup()
1092 pm_runtime_put_autosuspend(mcspi->dev); in omap2_mcspi_setup()
1099 struct omap2_mcspi *mcspi = data; in omap2_mcspi_irq_handler() local
1102 irqstat = mcspi_read_reg(mcspi->ctlr, OMAP2_MCSPI_IRQSTATUS); in omap2_mcspi_irq_handler()
1107 mcspi_write_reg(mcspi->ctlr, OMAP2_MCSPI_IRQENABLE, 0); in omap2_mcspi_irq_handler()
1109 complete(&mcspi->txdone); in omap2_mcspi_irq_handler()
1116 struct omap2_mcspi *mcspi = spi_controller_get_devdata(ctlr); in omap2_mcspi_target_abort() local
1117 struct omap2_mcspi_dma *mcspi_dma = mcspi->dma_channels; in omap2_mcspi_target_abort()
1119 mcspi->target_aborted = true; in omap2_mcspi_target_abort()
1122 complete(&mcspi->txdone); in omap2_mcspi_target_abort()
1139 struct omap2_mcspi *mcspi; in omap2_mcspi_transfer_one() local
1147 mcspi = spi_controller_get_devdata(ctlr); in omap2_mcspi_transfer_one()
1148 mcspi_dma = mcspi->dma_channels + spi_get_chipselect(spi, 0); in omap2_mcspi_transfer_one()
1179 chconf = mcspi->ctx.modulctrl; in omap2_mcspi_transfer_one()
1182 mcspi->ctx.modulctrl = in omap2_mcspi_transfer_one()
1233 if (mcspi->fifo_depth > 0) in omap2_mcspi_transfer_one()
1244 chconf = mcspi->ctx.modulctrl; in omap2_mcspi_transfer_one()
1247 mcspi->ctx.modulctrl = in omap2_mcspi_transfer_one()
1256 if (mcspi->fifo_depth > 0 && t) in omap2_mcspi_transfer_one()
1265 struct omap2_mcspi *mcspi = spi_controller_get_devdata(ctlr); in omap2_mcspi_prepare_message() local
1266 struct omap2_mcspi_regs *ctx = &mcspi->ctx; in omap2_mcspi_prepare_message()
1293 struct omap2_mcspi *mcspi = spi_controller_get_devdata(spi->controller); in omap2_mcspi_can_dma() local
1295 &mcspi->dma_channels[spi_get_chipselect(spi, 0)]; in omap2_mcspi_can_dma()
1311 struct omap2_mcspi *mcspi = spi_controller_get_devdata(spi->controller); in omap2_mcspi_max_xfer_size() local
1313 &mcspi->dma_channels[spi_get_chipselect(spi, 0)]; in omap2_mcspi_max_xfer_size()
1315 if (mcspi->max_xfer_len && mcspi_dma->dma_rx) in omap2_mcspi_max_xfer_size()
1316 return mcspi->max_xfer_len; in omap2_mcspi_max_xfer_size()
1321 static int omap2_mcspi_controller_setup(struct omap2_mcspi *mcspi) in omap2_mcspi_controller_setup() argument
1323 struct spi_controller *ctlr = mcspi->ctlr; in omap2_mcspi_controller_setup()
1324 struct omap2_mcspi_regs *ctx = &mcspi->ctx; in omap2_mcspi_controller_setup()
1327 ret = pm_runtime_resume_and_get(mcspi->dev); in omap2_mcspi_controller_setup()
1336 pm_runtime_mark_last_busy(mcspi->dev); in omap2_mcspi_controller_setup()
1337 pm_runtime_put_autosuspend(mcspi->dev); in omap2_mcspi_controller_setup()
1360 struct omap2_mcspi *mcspi = spi_controller_get_devdata(ctlr); in omap_mcspi_runtime_resume() local
1361 struct omap2_mcspi_regs *ctx = &mcspi->ctx; in omap_mcspi_runtime_resume()
1369 /* McSPI: context restore */ in omap_mcspi_runtime_resume()
1409 .compatible = "ti,omap2-mcspi",
1413 .compatible = "ti,omap4-mcspi",
1417 .compatible = "ti,am654-mcspi",
1428 struct omap2_mcspi *mcspi; in omap2_mcspi_probe() local
1436 ctlr = spi_alloc_target(&pdev->dev, sizeof(*mcspi)); in omap2_mcspi_probe()
1438 ctlr = spi_alloc_host(&pdev->dev, sizeof(*mcspi)); in omap2_mcspi_probe()
1458 mcspi = spi_controller_get_devdata(ctlr); in omap2_mcspi_probe()
1459 mcspi->ctlr = ctlr; in omap2_mcspi_probe()
1469 mcspi->pin_dir = MCSPI_PINDIR_D0_OUT_D1_IN; in omap2_mcspi_probe()
1473 mcspi->pin_dir = pdata->pin_dir; in omap2_mcspi_probe()
1477 mcspi->max_xfer_len = pdata->max_xfer_len; in omap2_mcspi_probe()
1481 mcspi->base = devm_platform_get_and_ioremap_resource(pdev, 0, &r); in omap2_mcspi_probe()
1482 if (IS_ERR(mcspi->base)) { in omap2_mcspi_probe()
1483 status = PTR_ERR(mcspi->base); in omap2_mcspi_probe()
1486 mcspi->phys = r->start + regs_offset; in omap2_mcspi_probe()
1487 mcspi->base += regs_offset; in omap2_mcspi_probe()
1489 mcspi->dev = &pdev->dev; in omap2_mcspi_probe()
1491 INIT_LIST_HEAD(&mcspi->ctx.cs); in omap2_mcspi_probe()
1493 mcspi->dma_channels = devm_kcalloc(&pdev->dev, ctlr->num_chipselect, in omap2_mcspi_probe()
1496 if (mcspi->dma_channels == NULL) { in omap2_mcspi_probe()
1502 sprintf(mcspi->dma_channels[i].dma_rx_ch_name, "rx%d", i); in omap2_mcspi_probe()
1503 sprintf(mcspi->dma_channels[i].dma_tx_ch_name, "tx%d", i); in omap2_mcspi_probe()
1505 status = omap2_mcspi_request_dma(mcspi, in omap2_mcspi_probe()
1506 &mcspi->dma_channels[i]); in omap2_mcspi_probe()
1514 init_completion(&mcspi->txdone); in omap2_mcspi_probe()
1517 mcspi); in omap2_mcspi_probe()
1523 mcspi->ref_clk = devm_clk_get_optional_enabled(&pdev->dev, NULL); in omap2_mcspi_probe()
1524 if (mcspi->ref_clk) in omap2_mcspi_probe()
1525 mcspi->ref_clk_hz = clk_get_rate(mcspi->ref_clk); in omap2_mcspi_probe()
1527 mcspi->ref_clk_hz = OMAP2_MCSPI_MAX_FREQ; in omap2_mcspi_probe()
1528 ctlr->max_speed_hz = mcspi->ref_clk_hz; in omap2_mcspi_probe()
1529 ctlr->min_speed_hz = mcspi->ref_clk_hz >> 15; in omap2_mcspi_probe()
1535 status = omap2_mcspi_controller_setup(mcspi); in omap2_mcspi_probe()
1558 struct omap2_mcspi *mcspi = spi_controller_get_devdata(ctlr); in omap2_mcspi_remove() local
1562 pm_runtime_dont_use_autosuspend(mcspi->dev); in omap2_mcspi_remove()
1563 pm_runtime_put_sync(mcspi->dev); in omap2_mcspi_remove()
1573 struct omap2_mcspi *mcspi = spi_controller_get_devdata(ctlr); in omap2_mcspi_suspend() local
1578 dev_warn(mcspi->dev, "%s: failed to set pins: %i\n", in omap2_mcspi_suspend()
1583 dev_warn(mcspi->dev, "%s: controller suspend failed: %i\n", in omap2_mcspi_suspend()
1592 struct omap2_mcspi *mcspi = spi_controller_get_devdata(ctlr); in omap2_mcspi_resume() local
1597 dev_warn(mcspi->dev, "%s: controller resume failed: %i\n", in omap2_mcspi_resume()