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
247 pm_runtime_get_sync(rs->dev); in rockchip_spi_set_cs()
250 ROCKCHIP_SPI_SET_BITS(rs->regs + ROCKCHIP_SPI_SER, 1); in rockchip_spi_set_cs()
252 ROCKCHIP_SPI_SET_BITS(rs->regs + ROCKCHIP_SPI_SER, in rockchip_spi_set_cs()
256 ROCKCHIP_SPI_CLR_BITS(rs->regs + ROCKCHIP_SPI_SER, 1); in rockchip_spi_set_cs()
258 ROCKCHIP_SPI_CLR_BITS(rs->regs + ROCKCHIP_SPI_SER, in rockchip_spi_set_cs()
262 pm_runtime_put(rs->dev); in rockchip_spi_set_cs()
269 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_handle_err() local
274 spi_enable_chip(rs, false); in rockchip_spi_handle_err()
277 writel_relaxed(0, rs->regs + ROCKCHIP_SPI_IMR); in rockchip_spi_handle_err()
278 writel_relaxed(0xffffffff, rs->regs + ROCKCHIP_SPI_ICR); in rockchip_spi_handle_err()
280 if (atomic_read(&rs->state) & TXDMA) in rockchip_spi_handle_err()
283 if (atomic_read(&rs->state) & RXDMA) in rockchip_spi_handle_err()
287 static void rockchip_spi_pio_writer(struct rockchip_spi *rs) in rockchip_spi_pio_writer() argument
289 u32 tx_free = rs->fifo_len - readl_relaxed(rs->regs + ROCKCHIP_SPI_TXFLR); in rockchip_spi_pio_writer()
290 u32 words = min(rs->tx_left, tx_free); in rockchip_spi_pio_writer()
292 rs->tx_left -= words; in rockchip_spi_pio_writer()
296 if (rs->n_bytes == 1) in rockchip_spi_pio_writer()
297 txw = *(u8 *)rs->tx; in rockchip_spi_pio_writer()
299 txw = *(u16 *)rs->tx; in rockchip_spi_pio_writer()
301 writel_relaxed(txw, rs->regs + ROCKCHIP_SPI_TXDR); in rockchip_spi_pio_writer()
302 rs->tx += rs->n_bytes; in rockchip_spi_pio_writer()
306 static void rockchip_spi_pio_reader(struct rockchip_spi *rs) in rockchip_spi_pio_reader() argument
308 u32 words = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXFLR); in rockchip_spi_pio_reader()
309 u32 rx_left = (rs->rx_left > words) ? rs->rx_left - words : 0; in rockchip_spi_pio_reader()
317 u32 ftl = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXFTLR) + 1; in rockchip_spi_pio_reader()
321 words = rs->rx_left - rx_left; in rockchip_spi_pio_reader()
325 rs->rx_left = rx_left; in rockchip_spi_pio_reader()
327 u32 rxw = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXDR); in rockchip_spi_pio_reader()
329 if (!rs->rx) in rockchip_spi_pio_reader()
332 if (rs->n_bytes == 1) in rockchip_spi_pio_reader()
333 *(u8 *)rs->rx = (u8)rxw; in rockchip_spi_pio_reader()
335 *(u16 *)rs->rx = (u16)rxw; in rockchip_spi_pio_reader()
336 rs->rx += rs->n_bytes; in rockchip_spi_pio_reader()
343 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_isr() local
346 if (rs->cs_inactive && readl_relaxed(rs->regs + ROCKCHIP_SPI_IMR) & INT_CS_INACTIVE) { in rockchip_spi_isr()
348 writel_relaxed(0, rs->regs + ROCKCHIP_SPI_IMR); in rockchip_spi_isr()
349 writel_relaxed(0xffffffff, rs->regs + ROCKCHIP_SPI_ICR); in rockchip_spi_isr()
354 if (rs->tx_left) in rockchip_spi_isr()
355 rockchip_spi_pio_writer(rs); in rockchip_spi_isr()
357 rockchip_spi_pio_reader(rs); in rockchip_spi_isr()
358 if (!rs->rx_left) { in rockchip_spi_isr()
359 spi_enable_chip(rs, false); in rockchip_spi_isr()
360 writel_relaxed(0, rs->regs + ROCKCHIP_SPI_IMR); in rockchip_spi_isr()
361 writel_relaxed(0xffffffff, rs->regs + ROCKCHIP_SPI_ICR); in rockchip_spi_isr()
368 static int rockchip_spi_prepare_irq(struct rockchip_spi *rs, in rockchip_spi_prepare_irq() argument
372 rs->tx = xfer->tx_buf; in rockchip_spi_prepare_irq()
373 rs->rx = xfer->rx_buf; in rockchip_spi_prepare_irq()
374 rs->tx_left = rs->tx ? xfer->len / rs->n_bytes : 0; in rockchip_spi_prepare_irq()
375 rs->rx_left = xfer->len / rs->n_bytes; in rockchip_spi_prepare_irq()
377 writel_relaxed(0xffffffff, rs->regs + ROCKCHIP_SPI_ICR); in rockchip_spi_prepare_irq()
379 spi_enable_chip(rs, true); in rockchip_spi_prepare_irq()
381 if (rs->tx_left) in rockchip_spi_prepare_irq()
382 rockchip_spi_pio_writer(rs); in rockchip_spi_prepare_irq()
384 if (rs->cs_inactive) in rockchip_spi_prepare_irq()
385 writel_relaxed(INT_RF_FULL | INT_CS_INACTIVE, rs->regs + ROCKCHIP_SPI_IMR); in rockchip_spi_prepare_irq()
387 writel_relaxed(INT_RF_FULL, rs->regs + ROCKCHIP_SPI_IMR); in rockchip_spi_prepare_irq()
396 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_dma_rxcb() local
397 int state = atomic_fetch_andnot(RXDMA, &rs->state); in rockchip_spi_dma_rxcb()
399 if (state & TXDMA && !rs->target_abort) in rockchip_spi_dma_rxcb()
402 if (rs->cs_inactive) in rockchip_spi_dma_rxcb()
403 writel_relaxed(0, rs->regs + ROCKCHIP_SPI_IMR); in rockchip_spi_dma_rxcb()
405 spi_enable_chip(rs, false); in rockchip_spi_dma_rxcb()
412 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_dma_txcb() local
413 int state = atomic_fetch_andnot(TXDMA, &rs->state); in rockchip_spi_dma_txcb()
415 if (state & RXDMA && !rs->target_abort) in rockchip_spi_dma_txcb()
419 wait_for_tx_idle(rs, ctlr->target); in rockchip_spi_dma_txcb()
421 spi_enable_chip(rs, false); in rockchip_spi_dma_txcb()
438 static int rockchip_spi_prepare_dma(struct rockchip_spi *rs, in rockchip_spi_prepare_dma() argument
443 atomic_set(&rs->state, 0); in rockchip_spi_prepare_dma()
445 rs->tx = xfer->tx_buf; in rockchip_spi_prepare_dma()
446 rs->rx = xfer->rx_buf; in rockchip_spi_prepare_dma()
452 .src_addr = rs->dma_addr_rx, in rockchip_spi_prepare_dma()
453 .src_addr_width = rs->n_bytes, in rockchip_spi_prepare_dma()
454 .src_maxburst = rockchip_spi_calc_burst_size(xfer->len / rs->n_bytes), in rockchip_spi_prepare_dma()
474 .dst_addr = rs->dma_addr_tx, in rockchip_spi_prepare_dma()
475 .dst_addr_width = rs->n_bytes, in rockchip_spi_prepare_dma()
476 .dst_maxburst = rs->fifo_len / 4, in rockchip_spi_prepare_dma()
497 atomic_or(RXDMA, &rs->state); in rockchip_spi_prepare_dma()
502 if (rs->cs_inactive) in rockchip_spi_prepare_dma()
503 writel_relaxed(INT_CS_INACTIVE, rs->regs + ROCKCHIP_SPI_IMR); in rockchip_spi_prepare_dma()
505 spi_enable_chip(rs, true); in rockchip_spi_prepare_dma()
508 atomic_or(TXDMA, &rs->state); in rockchip_spi_prepare_dma()
517 static int rockchip_spi_config(struct rockchip_spi *rs, in rockchip_spi_config() argument
530 rs->target_abort = false; in rockchip_spi_config()
532 cr0 |= rs->rsd << CR0_RSD_OFFSET; in rockchip_spi_config()
564 dev_err(rs->dev, "unknown bits per word: %d\n", in rockchip_spi_config()
576 writel_relaxed(cr0, rs->regs + ROCKCHIP_SPI_CTRLR0); in rockchip_spi_config()
577 writel_relaxed(cr1, rs->regs + ROCKCHIP_SPI_CTRLR1); in rockchip_spi_config()
583 if ((xfer->len / rs->n_bytes) < rs->fifo_len) in rockchip_spi_config()
584 writel_relaxed(xfer->len / rs->n_bytes - 1, rs->regs + ROCKCHIP_SPI_RXFTLR); in rockchip_spi_config()
586 writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_RXFTLR); in rockchip_spi_config()
588 writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_DMATDLR); in rockchip_spi_config()
589 writel_relaxed(rockchip_spi_calc_burst_size(xfer->len / rs->n_bytes) - 1, in rockchip_spi_config()
590 rs->regs + ROCKCHIP_SPI_DMARDLR); in rockchip_spi_config()
591 writel_relaxed(dmacr, rs->regs + ROCKCHIP_SPI_DMACR); in rockchip_spi_config()
597 writel_relaxed(2 * DIV_ROUND_UP(rs->freq, 2 * xfer->speed_hz), in rockchip_spi_config()
598 rs->regs + ROCKCHIP_SPI_BAUDR); in rockchip_spi_config()
610 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_target_abort() local
616 if (atomic_read(&rs->state) & RXDMA) { in rockchip_spi_target_abort()
620 rs->rx = rs->xfer->rx_buf; in rockchip_spi_target_abort()
621 rs->xfer->len = 0; in rockchip_spi_target_abort()
622 rx_fifo_left = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXFLR); in rockchip_spi_target_abort()
624 readl_relaxed(rs->regs + ROCKCHIP_SPI_RXDR); in rockchip_spi_target_abort()
627 rs->rx += rs->xfer->len - rs->n_bytes * state.residue; in rockchip_spi_target_abort()
631 /* Get the valid data left in rx fifo and set rs->xfer->len real rx size */ in rockchip_spi_target_abort()
632 if (rs->rx) { in rockchip_spi_target_abort()
633 rx_fifo_left = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXFLR); in rockchip_spi_target_abort()
635 u32 rxw = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXDR); in rockchip_spi_target_abort()
637 if (rs->n_bytes == 1) in rockchip_spi_target_abort()
638 *(u8 *)rs->rx = (u8)rxw; in rockchip_spi_target_abort()
640 *(u16 *)rs->rx = (u16)rxw; in rockchip_spi_target_abort()
641 rs->rx += rs->n_bytes; in rockchip_spi_target_abort()
643 rs->xfer->len = (unsigned int)(rs->rx - rs->xfer->rx_buf); in rockchip_spi_target_abort()
647 if (atomic_read(&rs->state) & RXDMA) in rockchip_spi_target_abort()
649 if (atomic_read(&rs->state) & TXDMA) in rockchip_spi_target_abort()
651 atomic_set(&rs->state, 0); in rockchip_spi_target_abort()
652 spi_enable_chip(rs, false); in rockchip_spi_target_abort()
653 rs->target_abort = true; in rockchip_spi_target_abort()
664 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_transfer_one() local
674 WARN_ON(readl_relaxed(rs->regs + ROCKCHIP_SPI_SSIENR) && in rockchip_spi_transfer_one()
675 (readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_BUSY)); in rockchip_spi_transfer_one()
678 dev_err(rs->dev, "No buffer for transfer\n"); in rockchip_spi_transfer_one()
683 dev_err(rs->dev, "Transfer is too long (%d)\n", xfer->len); in rockchip_spi_transfer_one()
687 rs->n_bytes = xfer->bits_per_word <= 8 ? 1 : 2; in rockchip_spi_transfer_one()
688 rs->xfer = xfer; in rockchip_spi_transfer_one()
691 ret = rockchip_spi_config(rs, spi, xfer, use_dma, ctlr->target); in rockchip_spi_transfer_one()
696 return rockchip_spi_prepare_dma(rs, ctlr, xfer); in rockchip_spi_transfer_one()
698 return rockchip_spi_prepare_irq(rs, ctlr, xfer); in rockchip_spi_transfer_one()
705 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_can_dma() local
712 return xfer->len / bytes_per_word >= rs->fifo_len; in rockchip_spi_can_dma()
717 struct rockchip_spi *rs = spi_controller_get_devdata(spi->controller); in rockchip_spi_setup() local
720 if (!spi_get_csgpiod(spi, 0) && (spi->mode & SPI_CS_HIGH) && !rs->cs_high_supported) { in rockchip_spi_setup()
725 pm_runtime_get_sync(rs->dev); in rockchip_spi_setup()
727 cr0 = readl_relaxed(rs->regs + ROCKCHIP_SPI_CTRLR0); in rockchip_spi_setup()
736 writel_relaxed(cr0, rs->regs + ROCKCHIP_SPI_CTRLR0); in rockchip_spi_setup()
738 pm_runtime_put(rs->dev); in rockchip_spi_setup()
746 struct rockchip_spi *rs; in rockchip_spi_probe() local
767 rs = spi_controller_get_devdata(ctlr); in rockchip_spi_probe()
770 rs->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &mem); in rockchip_spi_probe()
771 if (IS_ERR(rs->regs)) { in rockchip_spi_probe()
772 ret = PTR_ERR(rs->regs); in rockchip_spi_probe()
776 rs->apb_pclk = devm_clk_get_enabled(&pdev->dev, "apb_pclk"); in rockchip_spi_probe()
777 if (IS_ERR(rs->apb_pclk)) { in rockchip_spi_probe()
779 ret = PTR_ERR(rs->apb_pclk); in rockchip_spi_probe()
783 rs->spiclk = devm_clk_get_enabled(&pdev->dev, "spiclk"); in rockchip_spi_probe()
784 if (IS_ERR(rs->spiclk)) { in rockchip_spi_probe()
786 ret = PTR_ERR(rs->spiclk); in rockchip_spi_probe()
790 spi_enable_chip(rs, false); in rockchip_spi_probe()
801 rs->dev = &pdev->dev; in rockchip_spi_probe()
802 rs->freq = clk_get_rate(rs->spiclk); in rockchip_spi_probe()
807 u32 rsd = DIV_ROUND_CLOSEST(rsd_nsecs * (rs->freq >> 8), in rockchip_spi_probe()
810 dev_warn(rs->dev, "%u Hz are too slow to express %u ns delay\n", in rockchip_spi_probe()
811 rs->freq, rsd_nsecs); in rockchip_spi_probe()
814 dev_warn(rs->dev, "%u Hz are too fast to express %u ns delay, clamping at %u ns\n", in rockchip_spi_probe()
815 rs->freq, rsd_nsecs, in rockchip_spi_probe()
816 CR0_RSD_MAX * 1000000000U / rs->freq); in rockchip_spi_probe()
818 rs->rsd = rsd; in rockchip_spi_probe()
821 rs->fifo_len = get_fifo_len(rs); in rockchip_spi_probe()
822 if (!rs->fifo_len) { in rockchip_spi_probe()
853 ctlr->min_speed_hz = rs->freq / BAUDR_SCKDV_MAX; in rockchip_spi_probe()
854 ctlr->max_speed_hz = min(rs->freq / BAUDR_SCKDV_MIN, MAX_SCLK_OUT); in rockchip_spi_probe()
862 ctlr->dma_tx = dma_request_chan(rs->dev, "tx"); in rockchip_spi_probe()
869 dev_warn(rs->dev, "Failed to request TX DMA channel\n"); in rockchip_spi_probe()
873 ctlr->dma_rx = dma_request_chan(rs->dev, "rx"); in rockchip_spi_probe()
879 dev_warn(rs->dev, "Failed to request RX DMA channel\n"); in rockchip_spi_probe()
884 rs->dma_addr_tx = mem->start + ROCKCHIP_SPI_TXDR; in rockchip_spi_probe()
885 rs->dma_addr_rx = mem->start + ROCKCHIP_SPI_RXDR; in rockchip_spi_probe()
889 switch (readl_relaxed(rs->regs + ROCKCHIP_SPI_VERSION)) { in rockchip_spi_probe()
891 rs->cs_high_supported = true; in rockchip_spi_probe()
894 rs->cs_inactive = true; in rockchip_spi_probe()
896 rs->cs_inactive = false; in rockchip_spi_probe()
899 rs->cs_inactive = false; in rockchip_spi_probe()
983 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_runtime_suspend() local
985 clk_disable_unprepare(rs->spiclk); in rockchip_spi_runtime_suspend()
986 clk_disable_unprepare(rs->apb_pclk); in rockchip_spi_runtime_suspend()
995 struct rockchip_spi *rs = spi_controller_get_devdata(ctlr); in rockchip_spi_runtime_resume() local
997 ret = clk_prepare_enable(rs->apb_pclk); in rockchip_spi_runtime_resume()
1001 ret = clk_prepare_enable(rs->spiclk); in rockchip_spi_runtime_resume()
1003 clk_disable_unprepare(rs->apb_pclk); in rockchip_spi_runtime_resume()