Lines Matching refs:fsl_lpspi

150 static void fsl_lpspi_buf_rx_##type(struct fsl_lpspi_data *fsl_lpspi)	\
152 unsigned int val = readl(fsl_lpspi->base + IMX7ULP_RDR); \
154 if (fsl_lpspi->rx_buf) { \
155 *(type *)fsl_lpspi->rx_buf = val; \
156 fsl_lpspi->rx_buf += sizeof(type); \
161 static void fsl_lpspi_buf_tx_##type(struct fsl_lpspi_data *fsl_lpspi) \
165 if (fsl_lpspi->tx_buf) { \
166 val = *(type *)fsl_lpspi->tx_buf; \
167 fsl_lpspi->tx_buf += sizeof(type); \
170 fsl_lpspi->remain -= sizeof(type); \
171 writel(val, fsl_lpspi->base + IMX7ULP_TDR); \
181 static void fsl_lpspi_intctrl(struct fsl_lpspi_data *fsl_lpspi, in LPSPI_BUF_TX()
184 writel(enable, fsl_lpspi->base + IMX7ULP_IER); in LPSPI_BUF_TX()
217 struct fsl_lpspi_data *fsl_lpspi = in lpspi_prepare_xfer_hardware() local
221 ret = pm_runtime_resume_and_get(fsl_lpspi->dev); in lpspi_prepare_xfer_hardware()
223 dev_err(fsl_lpspi->dev, "failed to enable clock\n"); in lpspi_prepare_xfer_hardware()
232 struct fsl_lpspi_data *fsl_lpspi = in lpspi_unprepare_xfer_hardware() local
235 pm_runtime_mark_last_busy(fsl_lpspi->dev); in lpspi_unprepare_xfer_hardware()
236 pm_runtime_put_autosuspend(fsl_lpspi->dev); in lpspi_unprepare_xfer_hardware()
241 static void fsl_lpspi_write_tx_fifo(struct fsl_lpspi_data *fsl_lpspi) in fsl_lpspi_write_tx_fifo() argument
246 txfifo_cnt = readl(fsl_lpspi->base + IMX7ULP_FSR) & 0xff; in fsl_lpspi_write_tx_fifo()
248 while (txfifo_cnt < fsl_lpspi->txfifosize) { in fsl_lpspi_write_tx_fifo()
249 if (!fsl_lpspi->remain) in fsl_lpspi_write_tx_fifo()
251 fsl_lpspi->tx(fsl_lpspi); in fsl_lpspi_write_tx_fifo()
255 if (txfifo_cnt < fsl_lpspi->txfifosize) { in fsl_lpspi_write_tx_fifo()
256 if (!fsl_lpspi->is_target) { in fsl_lpspi_write_tx_fifo()
257 temp = readl(fsl_lpspi->base + IMX7ULP_TCR); in fsl_lpspi_write_tx_fifo()
259 writel(temp, fsl_lpspi->base + IMX7ULP_TCR); in fsl_lpspi_write_tx_fifo()
262 fsl_lpspi_intctrl(fsl_lpspi, IER_FCIE); in fsl_lpspi_write_tx_fifo()
264 fsl_lpspi_intctrl(fsl_lpspi, IER_TDIE); in fsl_lpspi_write_tx_fifo()
267 static void fsl_lpspi_read_rx_fifo(struct fsl_lpspi_data *fsl_lpspi) in fsl_lpspi_read_rx_fifo() argument
269 while (!(readl(fsl_lpspi->base + IMX7ULP_RSR) & RSR_RXEMPTY)) in fsl_lpspi_read_rx_fifo()
270 fsl_lpspi->rx(fsl_lpspi); in fsl_lpspi_read_rx_fifo()
273 static void fsl_lpspi_set_cmd(struct fsl_lpspi_data *fsl_lpspi) in fsl_lpspi_set_cmd() argument
277 temp |= fsl_lpspi->config.bpw - 1; in fsl_lpspi_set_cmd()
278 temp |= (fsl_lpspi->config.mode & 0x3) << 30; in fsl_lpspi_set_cmd()
279 temp |= (fsl_lpspi->config.chip_select & 0x3) << 24; in fsl_lpspi_set_cmd()
280 if (!fsl_lpspi->is_target) { in fsl_lpspi_set_cmd()
281 temp |= fsl_lpspi->config.prescale << 27; in fsl_lpspi_set_cmd()
287 if (!fsl_lpspi->usedma) { in fsl_lpspi_set_cmd()
289 if (fsl_lpspi->is_first_byte) in fsl_lpspi_set_cmd()
295 writel(temp, fsl_lpspi->base + IMX7ULP_TCR); in fsl_lpspi_set_cmd()
297 dev_dbg(fsl_lpspi->dev, "TCR=0x%x\n", temp); in fsl_lpspi_set_cmd()
300 static void fsl_lpspi_set_watermark(struct fsl_lpspi_data *fsl_lpspi) in fsl_lpspi_set_watermark() argument
304 if (!fsl_lpspi->usedma) in fsl_lpspi_set_watermark()
305 temp = fsl_lpspi->watermark >> 1 | in fsl_lpspi_set_watermark()
306 (fsl_lpspi->watermark >> 1) << 16; in fsl_lpspi_set_watermark()
308 temp = fsl_lpspi->watermark >> 1; in fsl_lpspi_set_watermark()
310 writel(temp, fsl_lpspi->base + IMX7ULP_FCR); in fsl_lpspi_set_watermark()
312 dev_dbg(fsl_lpspi->dev, "FCR=0x%x\n", temp); in fsl_lpspi_set_watermark()
315 static int fsl_lpspi_set_bitrate(struct fsl_lpspi_data *fsl_lpspi) in fsl_lpspi_set_bitrate() argument
317 struct lpspi_config config = fsl_lpspi->config; in fsl_lpspi_set_bitrate()
323 perclk_rate = clk_get_rate(fsl_lpspi->clk_per); in fsl_lpspi_set_bitrate()
324 prescale_max = fsl_lpspi->devtype_data->prescale_max; in fsl_lpspi_set_bitrate()
327 dev_err(fsl_lpspi->dev, in fsl_lpspi_set_bitrate()
333 dev_err(fsl_lpspi->dev, in fsl_lpspi_set_bitrate()
343 fsl_lpspi->config.prescale = prescale; in fsl_lpspi_set_bitrate()
352 fsl_lpspi->base + IMX7ULP_CCR); in fsl_lpspi_set_bitrate()
354 dev_dbg(fsl_lpspi->dev, "perclk=%d, speed=%d, prescale=%d, scldiv=%d\n", in fsl_lpspi_set_bitrate()
365 struct fsl_lpspi_data *fsl_lpspi = in fsl_lpspi_dma_configure() local
368 switch (fsl_lpspi_bytes_per_word(fsl_lpspi->config.bpw)) { in fsl_lpspi_dma_configure()
383 tx.dst_addr = fsl_lpspi->base_phys + IMX7ULP_TDR; in fsl_lpspi_dma_configure()
388 dev_err(fsl_lpspi->dev, "TX dma configuration failed with %d\n", in fsl_lpspi_dma_configure()
394 rx.src_addr = fsl_lpspi->base_phys + IMX7ULP_RDR; in fsl_lpspi_dma_configure()
399 dev_err(fsl_lpspi->dev, "RX dma configuration failed with %d\n", in fsl_lpspi_dma_configure()
407 static int fsl_lpspi_config(struct fsl_lpspi_data *fsl_lpspi) in fsl_lpspi_config() argument
412 if (!fsl_lpspi->is_target) { in fsl_lpspi_config()
413 ret = fsl_lpspi_set_bitrate(fsl_lpspi); in fsl_lpspi_config()
418 fsl_lpspi_set_watermark(fsl_lpspi); in fsl_lpspi_config()
420 if (!fsl_lpspi->is_target) in fsl_lpspi_config()
424 if (fsl_lpspi->config.mode & SPI_CS_HIGH) in fsl_lpspi_config()
426 writel(temp, fsl_lpspi->base + IMX7ULP_CFGR1); in fsl_lpspi_config()
428 temp = readl(fsl_lpspi->base + IMX7ULP_CR); in fsl_lpspi_config()
430 writel(temp, fsl_lpspi->base + IMX7ULP_CR); in fsl_lpspi_config()
433 if (fsl_lpspi->usedma) in fsl_lpspi_config()
435 writel(temp, fsl_lpspi->base + IMX7ULP_DER); in fsl_lpspi_config()
444 struct fsl_lpspi_data *fsl_lpspi = in fsl_lpspi_setup_transfer() local
450 fsl_lpspi->config.mode = spi->mode; in fsl_lpspi_setup_transfer()
451 fsl_lpspi->config.bpw = t->bits_per_word; in fsl_lpspi_setup_transfer()
452 fsl_lpspi->config.speed_hz = t->speed_hz; in fsl_lpspi_setup_transfer()
453 if (fsl_lpspi->is_only_cs1) in fsl_lpspi_setup_transfer()
454 fsl_lpspi->config.chip_select = 1; in fsl_lpspi_setup_transfer()
456 fsl_lpspi->config.chip_select = spi_get_chipselect(spi, 0); in fsl_lpspi_setup_transfer()
458 if (!fsl_lpspi->config.speed_hz) in fsl_lpspi_setup_transfer()
459 fsl_lpspi->config.speed_hz = spi->max_speed_hz; in fsl_lpspi_setup_transfer()
460 if (!fsl_lpspi->config.bpw) in fsl_lpspi_setup_transfer()
461 fsl_lpspi->config.bpw = spi->bits_per_word; in fsl_lpspi_setup_transfer()
464 if (fsl_lpspi->config.bpw <= 8) { in fsl_lpspi_setup_transfer()
465 fsl_lpspi->rx = fsl_lpspi_buf_rx_u8; in fsl_lpspi_setup_transfer()
466 fsl_lpspi->tx = fsl_lpspi_buf_tx_u8; in fsl_lpspi_setup_transfer()
467 } else if (fsl_lpspi->config.bpw <= 16) { in fsl_lpspi_setup_transfer()
468 fsl_lpspi->rx = fsl_lpspi_buf_rx_u16; in fsl_lpspi_setup_transfer()
469 fsl_lpspi->tx = fsl_lpspi_buf_tx_u16; in fsl_lpspi_setup_transfer()
471 fsl_lpspi->rx = fsl_lpspi_buf_rx_u32; in fsl_lpspi_setup_transfer()
472 fsl_lpspi->tx = fsl_lpspi_buf_tx_u32; in fsl_lpspi_setup_transfer()
475 if (t->len <= fsl_lpspi->txfifosize) in fsl_lpspi_setup_transfer()
476 fsl_lpspi->watermark = t->len; in fsl_lpspi_setup_transfer()
478 fsl_lpspi->watermark = fsl_lpspi->txfifosize; in fsl_lpspi_setup_transfer()
481 fsl_lpspi->usedma = true; in fsl_lpspi_setup_transfer()
483 fsl_lpspi->usedma = false; in fsl_lpspi_setup_transfer()
485 return fsl_lpspi_config(fsl_lpspi); in fsl_lpspi_setup_transfer()
490 struct fsl_lpspi_data *fsl_lpspi = in fsl_lpspi_target_abort() local
493 fsl_lpspi->target_aborted = true; in fsl_lpspi_target_abort()
494 if (!fsl_lpspi->usedma) in fsl_lpspi_target_abort()
495 complete(&fsl_lpspi->xfer_done); in fsl_lpspi_target_abort()
497 complete(&fsl_lpspi->dma_tx_completion); in fsl_lpspi_target_abort()
498 complete(&fsl_lpspi->dma_rx_completion); in fsl_lpspi_target_abort()
506 struct fsl_lpspi_data *fsl_lpspi = in fsl_lpspi_wait_for_completion() local
509 if (fsl_lpspi->is_target) { in fsl_lpspi_wait_for_completion()
510 if (wait_for_completion_interruptible(&fsl_lpspi->xfer_done) || in fsl_lpspi_wait_for_completion()
511 fsl_lpspi->target_aborted) { in fsl_lpspi_wait_for_completion()
512 dev_dbg(fsl_lpspi->dev, "interrupted\n"); in fsl_lpspi_wait_for_completion()
516 if (!wait_for_completion_timeout(&fsl_lpspi->xfer_done, HZ)) { in fsl_lpspi_wait_for_completion()
517 dev_dbg(fsl_lpspi->dev, "wait for completion timeout\n"); in fsl_lpspi_wait_for_completion()
525 static int fsl_lpspi_reset(struct fsl_lpspi_data *fsl_lpspi) in fsl_lpspi_reset() argument
529 if (!fsl_lpspi->usedma) { in fsl_lpspi_reset()
531 fsl_lpspi_intctrl(fsl_lpspi, 0); in fsl_lpspi_reset()
536 writel(temp, fsl_lpspi->base + IMX7ULP_SR); in fsl_lpspi_reset()
540 writel(temp, fsl_lpspi->base + IMX7ULP_CR); in fsl_lpspi_reset()
547 struct fsl_lpspi_data *fsl_lpspi = (struct fsl_lpspi_data *)cookie; in fsl_lpspi_dma_rx_callback() local
549 complete(&fsl_lpspi->dma_rx_completion); in fsl_lpspi_dma_rx_callback()
554 struct fsl_lpspi_data *fsl_lpspi = (struct fsl_lpspi_data *)cookie; in fsl_lpspi_dma_tx_callback() local
556 complete(&fsl_lpspi->dma_tx_completion); in fsl_lpspi_dma_tx_callback()
559 static int fsl_lpspi_calculate_timeout(struct fsl_lpspi_data *fsl_lpspi, in fsl_lpspi_calculate_timeout() argument
565 timeout = (8 + 4) * size / fsl_lpspi->config.speed_hz; in fsl_lpspi_calculate_timeout()
575 struct fsl_lpspi_data *fsl_lpspi, in fsl_lpspi_dma_transfer() argument
595 desc_rx->callback_param = (void *)fsl_lpspi; in fsl_lpspi_dma_transfer()
597 reinit_completion(&fsl_lpspi->dma_rx_completion); in fsl_lpspi_dma_transfer()
609 desc_tx->callback_param = (void *)fsl_lpspi; in fsl_lpspi_dma_transfer()
611 reinit_completion(&fsl_lpspi->dma_tx_completion); in fsl_lpspi_dma_transfer()
614 fsl_lpspi->target_aborted = false; in fsl_lpspi_dma_transfer()
616 if (!fsl_lpspi->is_target) { in fsl_lpspi_dma_transfer()
617 transfer_timeout = fsl_lpspi_calculate_timeout(fsl_lpspi, in fsl_lpspi_dma_transfer()
621 timeout = wait_for_completion_timeout(&fsl_lpspi->dma_tx_completion, in fsl_lpspi_dma_transfer()
624 dev_err(fsl_lpspi->dev, "I/O Error in DMA TX\n"); in fsl_lpspi_dma_transfer()
627 fsl_lpspi_reset(fsl_lpspi); in fsl_lpspi_dma_transfer()
631 timeout = wait_for_completion_timeout(&fsl_lpspi->dma_rx_completion, in fsl_lpspi_dma_transfer()
634 dev_err(fsl_lpspi->dev, "I/O Error in DMA RX\n"); in fsl_lpspi_dma_transfer()
637 fsl_lpspi_reset(fsl_lpspi); in fsl_lpspi_dma_transfer()
641 if (wait_for_completion_interruptible(&fsl_lpspi->dma_tx_completion) || in fsl_lpspi_dma_transfer()
642 fsl_lpspi->target_aborted) { in fsl_lpspi_dma_transfer()
643 dev_dbg(fsl_lpspi->dev, in fsl_lpspi_dma_transfer()
647 fsl_lpspi_reset(fsl_lpspi); in fsl_lpspi_dma_transfer()
651 if (wait_for_completion_interruptible(&fsl_lpspi->dma_rx_completion) || in fsl_lpspi_dma_transfer()
652 fsl_lpspi->target_aborted) { in fsl_lpspi_dma_transfer()
653 dev_dbg(fsl_lpspi->dev, in fsl_lpspi_dma_transfer()
657 fsl_lpspi_reset(fsl_lpspi); in fsl_lpspi_dma_transfer()
662 fsl_lpspi_reset(fsl_lpspi); in fsl_lpspi_dma_transfer()
681 struct fsl_lpspi_data *fsl_lpspi, in fsl_lpspi_dma_init() argument
704 init_completion(&fsl_lpspi->dma_rx_completion); in fsl_lpspi_dma_init()
705 init_completion(&fsl_lpspi->dma_tx_completion); in fsl_lpspi_dma_init()
718 struct fsl_lpspi_data *fsl_lpspi = in fsl_lpspi_pio_transfer() local
722 fsl_lpspi->tx_buf = t->tx_buf; in fsl_lpspi_pio_transfer()
723 fsl_lpspi->rx_buf = t->rx_buf; in fsl_lpspi_pio_transfer()
724 fsl_lpspi->remain = t->len; in fsl_lpspi_pio_transfer()
726 reinit_completion(&fsl_lpspi->xfer_done); in fsl_lpspi_pio_transfer()
727 fsl_lpspi->target_aborted = false; in fsl_lpspi_pio_transfer()
729 fsl_lpspi_write_tx_fifo(fsl_lpspi); in fsl_lpspi_pio_transfer()
735 fsl_lpspi_reset(fsl_lpspi); in fsl_lpspi_pio_transfer()
744 struct fsl_lpspi_data *fsl_lpspi = in fsl_lpspi_transfer_one() local
748 fsl_lpspi->is_first_byte = true; in fsl_lpspi_transfer_one()
753 fsl_lpspi_set_cmd(fsl_lpspi); in fsl_lpspi_transfer_one()
754 fsl_lpspi->is_first_byte = false; in fsl_lpspi_transfer_one()
756 if (fsl_lpspi->usedma) in fsl_lpspi_transfer_one()
757 ret = fsl_lpspi_dma_transfer(controller, fsl_lpspi, t); in fsl_lpspi_transfer_one()
769 struct fsl_lpspi_data *fsl_lpspi = dev_id; in fsl_lpspi_isr() local
771 temp_IER = readl(fsl_lpspi->base + IMX7ULP_IER); in fsl_lpspi_isr()
772 fsl_lpspi_intctrl(fsl_lpspi, 0); in fsl_lpspi_isr()
773 temp_SR = readl(fsl_lpspi->base + IMX7ULP_SR); in fsl_lpspi_isr()
775 fsl_lpspi_read_rx_fifo(fsl_lpspi); in fsl_lpspi_isr()
778 fsl_lpspi_write_tx_fifo(fsl_lpspi); in fsl_lpspi_isr()
783 readl(fsl_lpspi->base + IMX7ULP_FSR) & FSR_TXCOUNT) { in fsl_lpspi_isr()
784 writel(SR_FCF, fsl_lpspi->base + IMX7ULP_SR); in fsl_lpspi_isr()
785 fsl_lpspi_intctrl(fsl_lpspi, IER_FCIE); in fsl_lpspi_isr()
790 writel(SR_FCF, fsl_lpspi->base + IMX7ULP_SR); in fsl_lpspi_isr()
791 complete(&fsl_lpspi->xfer_done); in fsl_lpspi_isr()
802 struct fsl_lpspi_data *fsl_lpspi; in fsl_lpspi_runtime_resume() local
805 fsl_lpspi = spi_controller_get_devdata(controller); in fsl_lpspi_runtime_resume()
807 ret = clk_prepare_enable(fsl_lpspi->clk_per); in fsl_lpspi_runtime_resume()
811 ret = clk_prepare_enable(fsl_lpspi->clk_ipg); in fsl_lpspi_runtime_resume()
813 clk_disable_unprepare(fsl_lpspi->clk_per); in fsl_lpspi_runtime_resume()
823 struct fsl_lpspi_data *fsl_lpspi; in fsl_lpspi_runtime_suspend() local
825 fsl_lpspi = spi_controller_get_devdata(controller); in fsl_lpspi_runtime_suspend()
827 clk_disable_unprepare(fsl_lpspi->clk_per); in fsl_lpspi_runtime_suspend()
828 clk_disable_unprepare(fsl_lpspi->clk_ipg); in fsl_lpspi_runtime_suspend()
834 static int fsl_lpspi_init_rpm(struct fsl_lpspi_data *fsl_lpspi) in fsl_lpspi_init_rpm() argument
836 struct device *dev = fsl_lpspi->dev; in fsl_lpspi_init_rpm()
848 struct fsl_lpspi_data *fsl_lpspi; in fsl_lpspi_probe() local
873 fsl_lpspi = spi_controller_get_devdata(controller); in fsl_lpspi_probe()
874 fsl_lpspi->dev = &pdev->dev; in fsl_lpspi_probe()
875 fsl_lpspi->is_target = is_target; in fsl_lpspi_probe()
876 fsl_lpspi->is_only_cs1 = of_property_read_bool((&pdev->dev)->of_node, in fsl_lpspi_probe()
878 fsl_lpspi->devtype_data = devtype_data; in fsl_lpspi_probe()
880 init_completion(&fsl_lpspi->xfer_done); in fsl_lpspi_probe()
882 fsl_lpspi->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); in fsl_lpspi_probe()
883 if (IS_ERR(fsl_lpspi->base)) { in fsl_lpspi_probe()
884 ret = PTR_ERR(fsl_lpspi->base); in fsl_lpspi_probe()
887 fsl_lpspi->base_phys = res->start; in fsl_lpspi_probe()
896 dev_name(&pdev->dev), fsl_lpspi); in fsl_lpspi_probe()
902 fsl_lpspi->clk_per = devm_clk_get(&pdev->dev, "per"); in fsl_lpspi_probe()
903 if (IS_ERR(fsl_lpspi->clk_per)) { in fsl_lpspi_probe()
904 ret = PTR_ERR(fsl_lpspi->clk_per); in fsl_lpspi_probe()
908 fsl_lpspi->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); in fsl_lpspi_probe()
909 if (IS_ERR(fsl_lpspi->clk_ipg)) { in fsl_lpspi_probe()
910 ret = PTR_ERR(fsl_lpspi->clk_ipg); in fsl_lpspi_probe()
915 ret = fsl_lpspi_init_rpm(fsl_lpspi); in fsl_lpspi_probe()
919 ret = pm_runtime_get_sync(fsl_lpspi->dev); in fsl_lpspi_probe()
921 dev_err(fsl_lpspi->dev, "failed to enable clock\n"); in fsl_lpspi_probe()
925 temp = readl(fsl_lpspi->base + IMX7ULP_PARAM); in fsl_lpspi_probe()
926 fsl_lpspi->txfifosize = 1 << (temp & 0x0f); in fsl_lpspi_probe()
927 fsl_lpspi->rxfifosize = 1 << ((temp >> 8) & 0x0f); in fsl_lpspi_probe()
946 if (!fsl_lpspi->is_target) in fsl_lpspi_probe()
949 ret = fsl_lpspi_dma_init(&pdev->dev, fsl_lpspi, controller); in fsl_lpspi_probe()
963 pm_runtime_mark_last_busy(fsl_lpspi->dev); in fsl_lpspi_probe()
964 pm_runtime_put_autosuspend(fsl_lpspi->dev); in fsl_lpspi_probe()
971 pm_runtime_dont_use_autosuspend(fsl_lpspi->dev); in fsl_lpspi_probe()
972 pm_runtime_put_sync(fsl_lpspi->dev); in fsl_lpspi_probe()
973 pm_runtime_disable(fsl_lpspi->dev); in fsl_lpspi_probe()
981 struct fsl_lpspi_data *fsl_lpspi = in fsl_lpspi_remove() local
986 pm_runtime_dont_use_autosuspend(fsl_lpspi->dev); in fsl_lpspi_remove()
987 pm_runtime_disable(fsl_lpspi->dev); in fsl_lpspi_remove()