Lines Matching full:rs
201 static inline void spi_enable_chip(struct rockchip_spi *rs, bool enable) in spi_enable_chip() argument
203 writel_relaxed((enable ? 1U : 0U), rs->regs + ROCKCHIP_SPI_SSIENR); in spi_enable_chip()
206 static inline void wait_for_tx_idle(struct rockchip_spi *rs, bool target_mode) in wait_for_tx_idle() argument
212 if (!(readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_TARGET_TX_BUSY) && in wait_for_tx_idle()
213 !((readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_BUSY))) in wait_for_tx_idle()
216 if (!(readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_BUSY)) in wait_for_tx_idle()
221 dev_warn(rs->dev, "spi controller is in busy state!\n"); in wait_for_tx_idle()
224 static u32 get_fifo_len(struct rockchip_spi *rs) in get_fifo_len() argument
228 ver = readl_relaxed(rs->regs + ROCKCHIP_SPI_VERSION); in get_fifo_len()
242 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_set_cs() local
252 cs_actual = !!(readl_relaxed(rs->regs + ROCKCHIP_SPI_SER) & 1); in rockchip_spi_set_cs()
254 cs_actual = !!(readl_relaxed(rs->regs + ROCKCHIP_SPI_SER) & in rockchip_spi_set_cs()
261 pm_runtime_get_sync(rs->dev); in rockchip_spi_set_cs()
264 ROCKCHIP_SPI_SET_BITS(rs->regs + ROCKCHIP_SPI_SER, 1); in rockchip_spi_set_cs()
266 ROCKCHIP_SPI_SET_BITS(rs->regs + ROCKCHIP_SPI_SER, in rockchip_spi_set_cs()
270 ROCKCHIP_SPI_CLR_BITS(rs->regs + ROCKCHIP_SPI_SER, 1); in rockchip_spi_set_cs()
272 ROCKCHIP_SPI_CLR_BITS(rs->regs + ROCKCHIP_SPI_SER, in rockchip_spi_set_cs()
276 pm_runtime_put(rs->dev); in rockchip_spi_set_cs()
283 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_handle_err() local
288 spi_enable_chip(rs, false); in rockchip_spi_handle_err()
291 writel_relaxed(0, rs->regs + ROCKCHIP_SPI_IMR); in rockchip_spi_handle_err()
292 writel_relaxed(0xffffffff, rs->regs + ROCKCHIP_SPI_ICR); in rockchip_spi_handle_err()
294 if (atomic_read(&rs->state) & TXDMA) in rockchip_spi_handle_err()
297 if (atomic_read(&rs->state) & RXDMA) in rockchip_spi_handle_err()
301 static void rockchip_spi_pio_writer(struct rockchip_spi *rs) in rockchip_spi_pio_writer() argument
303 u32 tx_free = rs->fifo_len - readl_relaxed(rs->regs + ROCKCHIP_SPI_TXFLR); in rockchip_spi_pio_writer()
304 u32 words = min(rs->tx_left, tx_free); in rockchip_spi_pio_writer()
306 rs->tx_left -= words; in rockchip_spi_pio_writer()
310 if (rs->n_bytes == 1) in rockchip_spi_pio_writer()
311 txw = *(u8 *)rs->tx; in rockchip_spi_pio_writer()
313 txw = *(u16 *)rs->tx; in rockchip_spi_pio_writer()
315 writel_relaxed(txw, rs->regs + ROCKCHIP_SPI_TXDR); in rockchip_spi_pio_writer()
316 rs->tx += rs->n_bytes; in rockchip_spi_pio_writer()
320 static void rockchip_spi_pio_reader(struct rockchip_spi *rs) in rockchip_spi_pio_reader() argument
322 u32 words = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXFLR); in rockchip_spi_pio_reader()
323 u32 rx_left = (rs->rx_left > words) ? rs->rx_left - words : 0; in rockchip_spi_pio_reader()
331 u32 ftl = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXFTLR) + 1; in rockchip_spi_pio_reader()
335 words = rs->rx_left - rx_left; in rockchip_spi_pio_reader()
339 rs->rx_left = rx_left; in rockchip_spi_pio_reader()
341 u32 rxw = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXDR); in rockchip_spi_pio_reader()
343 if (!rs->rx) in rockchip_spi_pio_reader()
346 if (rs->n_bytes == 1) in rockchip_spi_pio_reader()
347 *(u8 *)rs->rx = (u8)rxw; in rockchip_spi_pio_reader()
349 *(u16 *)rs->rx = (u16)rxw; in rockchip_spi_pio_reader()
350 rs->rx += rs->n_bytes; in rockchip_spi_pio_reader()
357 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_isr() local
360 if (rs->cs_inactive && readl_relaxed(rs->regs + ROCKCHIP_SPI_IMR) & INT_CS_INACTIVE) { in rockchip_spi_isr()
362 writel_relaxed(0, rs->regs + ROCKCHIP_SPI_IMR); in rockchip_spi_isr()
363 writel_relaxed(0xffffffff, rs->regs + ROCKCHIP_SPI_ICR); in rockchip_spi_isr()
368 if (rs->tx_left) in rockchip_spi_isr()
369 rockchip_spi_pio_writer(rs); in rockchip_spi_isr()
371 rockchip_spi_pio_reader(rs); in rockchip_spi_isr()
372 if (!rs->rx_left) { in rockchip_spi_isr()
373 spi_enable_chip(rs, false); in rockchip_spi_isr()
374 writel_relaxed(0, rs->regs + ROCKCHIP_SPI_IMR); in rockchip_spi_isr()
375 writel_relaxed(0xffffffff, rs->regs + ROCKCHIP_SPI_ICR); in rockchip_spi_isr()
382 static int rockchip_spi_prepare_irq(struct rockchip_spi *rs, in rockchip_spi_prepare_irq() argument
386 rs->tx = xfer->tx_buf; in rockchip_spi_prepare_irq()
387 rs->rx = xfer->rx_buf; in rockchip_spi_prepare_irq()
388 rs->tx_left = rs->tx ? xfer->len / rs->n_bytes : 0; in rockchip_spi_prepare_irq()
389 rs->rx_left = xfer->len / rs->n_bytes; in rockchip_spi_prepare_irq()
391 writel_relaxed(0xffffffff, rs->regs + ROCKCHIP_SPI_ICR); in rockchip_spi_prepare_irq()
393 spi_enable_chip(rs, true); in rockchip_spi_prepare_irq()
395 if (rs->tx_left) in rockchip_spi_prepare_irq()
396 rockchip_spi_pio_writer(rs); in rockchip_spi_prepare_irq()
398 if (rs->cs_inactive) in rockchip_spi_prepare_irq()
399 writel_relaxed(INT_RF_FULL | INT_CS_INACTIVE, rs->regs + ROCKCHIP_SPI_IMR); in rockchip_spi_prepare_irq()
401 writel_relaxed(INT_RF_FULL, rs->regs + ROCKCHIP_SPI_IMR); in rockchip_spi_prepare_irq()
410 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_dma_rxcb() local
411 int state = atomic_fetch_andnot(RXDMA, &rs->state); in rockchip_spi_dma_rxcb()
413 if (state & TXDMA && !rs->target_abort) in rockchip_spi_dma_rxcb()
416 if (rs->cs_inactive) in rockchip_spi_dma_rxcb()
417 writel_relaxed(0, rs->regs + ROCKCHIP_SPI_IMR); in rockchip_spi_dma_rxcb()
419 spi_enable_chip(rs, false); in rockchip_spi_dma_rxcb()
426 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_dma_txcb() local
427 int state = atomic_fetch_andnot(TXDMA, &rs->state); in rockchip_spi_dma_txcb()
429 if (state & RXDMA && !rs->target_abort) in rockchip_spi_dma_txcb()
433 wait_for_tx_idle(rs, ctlr->target); in rockchip_spi_dma_txcb()
435 spi_enable_chip(rs, false); in rockchip_spi_dma_txcb()
452 static int rockchip_spi_prepare_dma(struct rockchip_spi *rs, in rockchip_spi_prepare_dma() argument
457 atomic_set(&rs->state, 0); in rockchip_spi_prepare_dma()
459 rs->tx = xfer->tx_buf; in rockchip_spi_prepare_dma()
460 rs->rx = xfer->rx_buf; in rockchip_spi_prepare_dma()
466 .src_addr = rs->dma_addr_rx, in rockchip_spi_prepare_dma()
467 .src_addr_width = rs->n_bytes, in rockchip_spi_prepare_dma()
468 .src_maxburst = rockchip_spi_calc_burst_size(xfer->len / rs->n_bytes), in rockchip_spi_prepare_dma()
488 .dst_addr = rs->dma_addr_tx, in rockchip_spi_prepare_dma()
489 .dst_addr_width = rs->n_bytes, in rockchip_spi_prepare_dma()
490 .dst_maxburst = rs->fifo_len / 4, in rockchip_spi_prepare_dma()
511 atomic_or(RXDMA, &rs->state); in rockchip_spi_prepare_dma()
516 if (rs->cs_inactive) in rockchip_spi_prepare_dma()
517 writel_relaxed(INT_CS_INACTIVE, rs->regs + ROCKCHIP_SPI_IMR); in rockchip_spi_prepare_dma()
519 spi_enable_chip(rs, true); in rockchip_spi_prepare_dma()
522 atomic_or(TXDMA, &rs->state); in rockchip_spi_prepare_dma()
531 static int rockchip_spi_config(struct rockchip_spi *rs, in rockchip_spi_config() argument
544 rs->target_abort = false; in rockchip_spi_config()
546 cr0 |= rs->rsd << CR0_RSD_OFFSET; in rockchip_spi_config()
578 dev_err(rs->dev, "unknown bits per word: %d\n", in rockchip_spi_config()
590 writel_relaxed(cr0, rs->regs + ROCKCHIP_SPI_CTRLR0); in rockchip_spi_config()
591 writel_relaxed(cr1, rs->regs + ROCKCHIP_SPI_CTRLR1); in rockchip_spi_config()
597 if ((xfer->len / rs->n_bytes) < rs->fifo_len) in rockchip_spi_config()
598 writel_relaxed(xfer->len / rs->n_bytes - 1, rs->regs + ROCKCHIP_SPI_RXFTLR); in rockchip_spi_config()
600 writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_RXFTLR); in rockchip_spi_config()
602 writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_DMATDLR); in rockchip_spi_config()
603 writel_relaxed(rockchip_spi_calc_burst_size(xfer->len / rs->n_bytes) - 1, in rockchip_spi_config()
604 rs->regs + ROCKCHIP_SPI_DMARDLR); in rockchip_spi_config()
605 writel_relaxed(dmacr, rs->regs + ROCKCHIP_SPI_DMACR); in rockchip_spi_config()
611 writel_relaxed(2 * DIV_ROUND_UP(rs->freq, 2 * xfer->speed_hz), in rockchip_spi_config()
612 rs->regs + ROCKCHIP_SPI_BAUDR); in rockchip_spi_config()
624 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_target_abort() local
630 if (atomic_read(&rs->state) & RXDMA) { in rockchip_spi_target_abort()
634 rs->rx = rs->xfer->rx_buf; in rockchip_spi_target_abort()
635 rs->xfer->len = 0; in rockchip_spi_target_abort()
636 rx_fifo_left = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXFLR); in rockchip_spi_target_abort()
638 readl_relaxed(rs->regs + ROCKCHIP_SPI_RXDR); in rockchip_spi_target_abort()
641 rs->rx += rs->xfer->len - rs->n_bytes * state.residue; in rockchip_spi_target_abort()
645 /* Get the valid data left in rx fifo and set rs->xfer->len real rx size */ in rockchip_spi_target_abort()
646 if (rs->rx) { in rockchip_spi_target_abort()
647 rx_fifo_left = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXFLR); in rockchip_spi_target_abort()
649 u32 rxw = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXDR); in rockchip_spi_target_abort()
651 if (rs->n_bytes == 1) in rockchip_spi_target_abort()
652 *(u8 *)rs->rx = (u8)rxw; in rockchip_spi_target_abort()
654 *(u16 *)rs->rx = (u16)rxw; in rockchip_spi_target_abort()
655 rs->rx += rs->n_bytes; in rockchip_spi_target_abort()
657 rs->xfer->len = (unsigned int)(rs->rx - rs->xfer->rx_buf); in rockchip_spi_target_abort()
661 if (atomic_read(&rs->state) & RXDMA) in rockchip_spi_target_abort()
663 if (atomic_read(&rs->state) & TXDMA) in rockchip_spi_target_abort()
665 atomic_set(&rs->state, 0); in rockchip_spi_target_abort()
666 spi_enable_chip(rs, false); in rockchip_spi_target_abort()
667 rs->target_abort = true; in rockchip_spi_target_abort()
678 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_transfer_one() local
688 WARN_ON(readl_relaxed(rs->regs + ROCKCHIP_SPI_SSIENR) && in rockchip_spi_transfer_one()
689 (readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_BUSY)); in rockchip_spi_transfer_one()
692 dev_err(rs->dev, "No buffer for transfer\n"); in rockchip_spi_transfer_one()
697 dev_err(rs->dev, "Transfer is too long (%d)\n", xfer->len); in rockchip_spi_transfer_one()
701 rs->n_bytes = xfer->bits_per_word <= 8 ? 1 : 2; in rockchip_spi_transfer_one()
702 rs->xfer = xfer; in rockchip_spi_transfer_one()
705 ret = rockchip_spi_config(rs, spi, xfer, use_dma, ctlr->target); in rockchip_spi_transfer_one()
710 return rockchip_spi_prepare_dma(rs, ctlr, xfer); in rockchip_spi_transfer_one()
712 return rockchip_spi_prepare_irq(rs, ctlr, xfer); in rockchip_spi_transfer_one()
719 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_can_dma() local
726 return xfer->len / bytes_per_word >= rs->fifo_len; in rockchip_spi_can_dma()
731 struct rockchip_spi *rs = spi_controller_get_devdata(spi->controller); in rockchip_spi_setup() local
734 if (!spi_get_csgpiod(spi, 0) && (spi->mode & SPI_CS_HIGH) && !rs->cs_high_supported) { in rockchip_spi_setup()
739 pm_runtime_get_sync(rs->dev); in rockchip_spi_setup()
741 cr0 = readl_relaxed(rs->regs + ROCKCHIP_SPI_CTRLR0); in rockchip_spi_setup()
750 writel_relaxed(cr0, rs->regs + ROCKCHIP_SPI_CTRLR0); in rockchip_spi_setup()
752 pm_runtime_put(rs->dev); in rockchip_spi_setup()
761 struct rockchip_spi *rs; in rockchip_spi_probe() local
779 rs = spi_controller_get_devdata(ctlr); in rockchip_spi_probe()
782 rs->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &mem); in rockchip_spi_probe()
783 if (IS_ERR(rs->regs)) { in rockchip_spi_probe()
784 ret = PTR_ERR(rs->regs); in rockchip_spi_probe()
788 rs->apb_pclk = devm_clk_get_enabled(&pdev->dev, "apb_pclk"); in rockchip_spi_probe()
789 if (IS_ERR(rs->apb_pclk)) { in rockchip_spi_probe()
790 ret = dev_err_probe(&pdev->dev, PTR_ERR(rs->apb_pclk), in rockchip_spi_probe()
795 rs->spiclk = devm_clk_get_enabled(&pdev->dev, "spiclk"); in rockchip_spi_probe()
796 if (IS_ERR(rs->spiclk)) { in rockchip_spi_probe()
797 ret = dev_err_probe(&pdev->dev, PTR_ERR(rs->spiclk), in rockchip_spi_probe()
802 spi_enable_chip(rs, false); in rockchip_spi_probe()
813 rs->dev = &pdev->dev; in rockchip_spi_probe()
814 rs->freq = clk_get_rate(rs->spiclk); in rockchip_spi_probe()
819 u32 rsd = DIV_ROUND_CLOSEST(rsd_nsecs * (rs->freq >> 8), 1000000000 >> 8); in rockchip_spi_probe()
821 dev_warn(rs->dev, "%u Hz are too slow to express %u ns delay\n", in rockchip_spi_probe()
822 rs->freq, rsd_nsecs); in rockchip_spi_probe()
825 dev_warn(rs->dev, in rockchip_spi_probe()
827 rs->freq, rsd_nsecs, CR0_RSD_MAX * 1000000000U / rs->freq); in rockchip_spi_probe()
829 rs->rsd = rsd; in rockchip_spi_probe()
832 rs->fifo_len = get_fifo_len(rs); in rockchip_spi_probe()
833 if (!rs->fifo_len) { in rockchip_spi_probe()
863 ctlr->min_speed_hz = rs->freq / BAUDR_SCKDV_MAX; in rockchip_spi_probe()
864 ctlr->max_speed_hz = min(rs->freq / BAUDR_SCKDV_MIN, MAX_SCLK_OUT); in rockchip_spi_probe()
872 ctlr->dma_tx = dma_request_chan(rs->dev, "tx"); in rockchip_spi_probe()
875 ret = dev_warn_probe(rs->dev, PTR_ERR(ctlr->dma_tx), in rockchip_spi_probe()
882 ctlr->dma_rx = dma_request_chan(rs->dev, "rx"); in rockchip_spi_probe()
885 ret = dev_warn_probe(rs->dev, PTR_ERR(ctlr->dma_rx), in rockchip_spi_probe()
893 rs->dma_addr_tx = mem->start + ROCKCHIP_SPI_TXDR; in rockchip_spi_probe()
894 rs->dma_addr_rx = mem->start + ROCKCHIP_SPI_RXDR; in rockchip_spi_probe()
898 switch (readl_relaxed(rs->regs + ROCKCHIP_SPI_VERSION)) { in rockchip_spi_probe()
900 rs->cs_high_supported = true; in rockchip_spi_probe()
903 rs->cs_inactive = true; in rockchip_spi_probe()
905 rs->cs_inactive = false; in rockchip_spi_probe()
908 rs->cs_inactive = false; in rockchip_spi_probe()
992 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_runtime_suspend() local
994 clk_disable_unprepare(rs->spiclk); in rockchip_spi_runtime_suspend()
995 clk_disable_unprepare(rs->apb_pclk); in rockchip_spi_runtime_suspend()
1004 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_runtime_resume() local
1006 ret = clk_prepare_enable(rs->apb_pclk); in rockchip_spi_runtime_resume()
1010 ret = clk_prepare_enable(rs->spiclk); in rockchip_spi_runtime_resume()
1012 clk_disable_unprepare(rs->apb_pclk); in rockchip_spi_runtime_resume()