Lines Matching refs:sspi
117 static inline u32 sun6i_spi_read(struct sun6i_spi *sspi, u32 reg) in sun6i_spi_read() argument
119 return readl(sspi->base_addr + reg); in sun6i_spi_read()
122 static inline void sun6i_spi_write(struct sun6i_spi *sspi, u32 reg, u32 value) in sun6i_spi_write() argument
124 writel(value, sspi->base_addr + reg); in sun6i_spi_write()
127 static inline u32 sun6i_spi_get_rx_fifo_count(struct sun6i_spi *sspi) in sun6i_spi_get_rx_fifo_count() argument
129 u32 reg = sun6i_spi_read(sspi, SUN6I_FIFO_STA_REG); in sun6i_spi_get_rx_fifo_count()
134 static inline u32 sun6i_spi_get_tx_fifo_count(struct sun6i_spi *sspi) in sun6i_spi_get_tx_fifo_count() argument
136 u32 reg = sun6i_spi_read(sspi, SUN6I_FIFO_STA_REG); in sun6i_spi_get_tx_fifo_count()
141 static inline void sun6i_spi_disable_interrupt(struct sun6i_spi *sspi, u32 mask) in sun6i_spi_disable_interrupt() argument
143 u32 reg = sun6i_spi_read(sspi, SUN6I_INT_CTL_REG); in sun6i_spi_disable_interrupt()
146 sun6i_spi_write(sspi, SUN6I_INT_CTL_REG, reg); in sun6i_spi_disable_interrupt()
149 static inline void sun6i_spi_drain_fifo(struct sun6i_spi *sspi) in sun6i_spi_drain_fifo() argument
155 len = sun6i_spi_get_rx_fifo_count(sspi); in sun6i_spi_drain_fifo()
158 byte = readb(sspi->base_addr + SUN6I_RXDATA_REG); in sun6i_spi_drain_fifo()
159 if (sspi->rx_buf) in sun6i_spi_drain_fifo()
160 *sspi->rx_buf++ = byte; in sun6i_spi_drain_fifo()
164 static inline void sun6i_spi_fill_fifo(struct sun6i_spi *sspi) in sun6i_spi_fill_fifo() argument
171 cnt = sspi->cfg->fifo_depth - sun6i_spi_get_tx_fifo_count(sspi); in sun6i_spi_fill_fifo()
173 len = min((int)cnt, sspi->len); in sun6i_spi_fill_fifo()
176 byte = sspi->tx_buf ? *sspi->tx_buf++ : 0; in sun6i_spi_fill_fifo()
177 writeb(byte, sspi->base_addr + SUN6I_TXDATA_REG); in sun6i_spi_fill_fifo()
178 sspi->len--; in sun6i_spi_fill_fifo()
184 struct sun6i_spi *sspi = spi_controller_get_devdata(spi->controller); in sun6i_spi_set_cs() local
187 reg = sun6i_spi_read(sspi, SUN6I_TFR_CTL_REG); in sun6i_spi_set_cs()
196 sun6i_spi_write(sspi, SUN6I_TFR_CTL_REG, reg); in sun6i_spi_set_cs()
206 struct sun6i_spi *sspi = param; in sun6i_spi_dma_rx_cb() local
208 complete(&sspi->dma_rx_done); in sun6i_spi_dma_rx_cb()
211 static int sun6i_spi_prepare_dma(struct sun6i_spi *sspi, in sun6i_spi_prepare_dma() argument
215 struct spi_controller *host = sspi->host; in sun6i_spi_prepare_dma()
221 .src_addr = sspi->dma_addr_rx, in sun6i_spi_prepare_dma()
235 rxdesc->callback_param = sspi; in sun6i_spi_prepare_dma()
243 .dst_addr = sspi->dma_addr_tx, in sun6i_spi_prepare_dma()
279 struct sun6i_spi *sspi = spi_controller_get_devdata(host); in sun6i_spi_transfer_one() local
292 reinit_completion(&sspi->done); in sun6i_spi_transfer_one()
293 reinit_completion(&sspi->dma_rx_done); in sun6i_spi_transfer_one()
294 sspi->tx_buf = tfr->tx_buf; in sun6i_spi_transfer_one()
295 sspi->rx_buf = tfr->rx_buf; in sun6i_spi_transfer_one()
296 sspi->len = tfr->len; in sun6i_spi_transfer_one()
300 sun6i_spi_write(sspi, SUN6I_INT_STA_REG, ~0); in sun6i_spi_transfer_one()
303 sun6i_spi_write(sspi, SUN6I_FIFO_CTL_REG, in sun6i_spi_transfer_one()
315 trig_level = sspi->cfg->fifo_depth / 4 * 3; in sun6i_spi_transfer_one()
322 trig_level = sspi->cfg->fifo_depth / 2; in sun6i_spi_transfer_one()
333 sun6i_spi_write(sspi, SUN6I_FIFO_CTL_REG, reg); in sun6i_spi_transfer_one()
339 reg = sun6i_spi_read(sspi, SUN6I_TFR_CTL_REG); in sun6i_spi_transfer_one()
360 if (sspi->rx_buf) { in sun6i_spi_transfer_one()
370 sun6i_spi_write(sspi, SUN6I_TFR_CTL_REG, reg); in sun6i_spi_transfer_one()
372 if (sspi->cfg->has_clk_ctl) { in sun6i_spi_transfer_one()
373 unsigned int mclk_rate = clk_get_rate(sspi->mclk); in sun6i_spi_transfer_one()
377 clk_set_rate(sspi->mclk, 2 * tfr->speed_hz); in sun6i_spi_transfer_one()
378 mclk_rate = clk_get_rate(sspi->mclk); in sun6i_spi_transfer_one()
406 sun6i_spi_write(sspi, SUN6I_CLK_CTL_REG, reg); in sun6i_spi_transfer_one()
408 clk_set_rate(sspi->mclk, tfr->speed_hz); in sun6i_spi_transfer_one()
409 tfr->effective_speed_hz = clk_get_rate(sspi->mclk); in sun6i_spi_transfer_one()
420 reg = sun6i_spi_read(sspi, SUN6I_TFR_CTL_REG); in sun6i_spi_transfer_one()
428 sun6i_spi_write(sspi, SUN6I_TFR_CTL_REG, reg); in sun6i_spi_transfer_one()
432 reg = sun6i_spi_read(sspi, SUN6I_GBL_CTL_REG); in sun6i_spi_transfer_one()
434 sun6i_spi_write(sspi, SUN6I_GBL_CTL_REG, reg); in sun6i_spi_transfer_one()
437 if (sspi->tx_buf) { in sun6i_spi_transfer_one()
457 sun6i_spi_write(sspi, SUN6I_BURST_CTL_CNT_REG, reg); in sun6i_spi_transfer_one()
458 sun6i_spi_write(sspi, SUN6I_BURST_CNT_REG, tfr->len); in sun6i_spi_transfer_one()
459 sun6i_spi_write(sspi, SUN6I_XMIT_CNT_REG, tx_len); in sun6i_spi_transfer_one()
463 sun6i_spi_fill_fifo(sspi); in sun6i_spi_transfer_one()
465 ret = sun6i_spi_prepare_dma(sspi, tfr); in sun6i_spi_transfer_one()
478 if (rx_len > sspi->cfg->fifo_depth) in sun6i_spi_transfer_one()
480 if (tx_len > sspi->cfg->fifo_depth) in sun6i_spi_transfer_one()
484 sun6i_spi_write(sspi, SUN6I_INT_CTL_REG, reg); in sun6i_spi_transfer_one()
487 reg = sun6i_spi_read(sspi, SUN6I_TFR_CTL_REG); in sun6i_spi_transfer_one()
488 sun6i_spi_write(sspi, SUN6I_TFR_CTL_REG, reg | SUN6I_TFR_CTL_XCH); in sun6i_spi_transfer_one()
492 time_left = wait_for_completion_timeout(&sspi->done, in sun6i_spi_transfer_one()
496 sun6i_spi_drain_fifo(sspi); in sun6i_spi_transfer_one()
503 time_left = wait_for_completion_timeout(&sspi->dma_rx_done, in sun6i_spi_transfer_one()
519 sun6i_spi_write(sspi, SUN6I_INT_CTL_REG, 0); in sun6i_spi_transfer_one()
531 struct sun6i_spi *sspi = dev_id; in sun6i_spi_handler() local
532 u32 status = sun6i_spi_read(sspi, SUN6I_INT_STA_REG); in sun6i_spi_handler()
536 sun6i_spi_write(sspi, SUN6I_INT_STA_REG, SUN6I_INT_CTL_TC); in sun6i_spi_handler()
537 complete(&sspi->done); in sun6i_spi_handler()
543 sun6i_spi_drain_fifo(sspi); in sun6i_spi_handler()
545 sun6i_spi_write(sspi, SUN6I_INT_STA_REG, SUN6I_INT_CTL_RF_RDY); in sun6i_spi_handler()
551 sun6i_spi_fill_fifo(sspi); in sun6i_spi_handler()
553 if (!sspi->len) in sun6i_spi_handler()
555 sun6i_spi_disable_interrupt(sspi, SUN6I_INT_CTL_TF_ERQ); in sun6i_spi_handler()
558 sun6i_spi_write(sspi, SUN6I_INT_STA_REG, SUN6I_INT_CTL_TF_ERQ); in sun6i_spi_handler()
569 struct sun6i_spi *sspi = spi_controller_get_devdata(host); in sun6i_spi_runtime_resume() local
572 ret = clk_prepare_enable(sspi->hclk); in sun6i_spi_runtime_resume()
578 ret = clk_prepare_enable(sspi->mclk); in sun6i_spi_runtime_resume()
584 ret = reset_control_deassert(sspi->rstc); in sun6i_spi_runtime_resume()
590 sun6i_spi_write(sspi, SUN6I_GBL_CTL_REG, in sun6i_spi_runtime_resume()
596 clk_disable_unprepare(sspi->mclk); in sun6i_spi_runtime_resume()
598 clk_disable_unprepare(sspi->hclk); in sun6i_spi_runtime_resume()
606 struct sun6i_spi *sspi = spi_controller_get_devdata(host); in sun6i_spi_runtime_suspend() local
608 reset_control_assert(sspi->rstc); in sun6i_spi_runtime_suspend()
609 clk_disable_unprepare(sspi->mclk); in sun6i_spi_runtime_suspend()
610 clk_disable_unprepare(sspi->hclk); in sun6i_spi_runtime_suspend()
619 struct sun6i_spi *sspi = spi_controller_get_devdata(host); in sun6i_spi_can_dma() local
626 return xfer->len > sspi->cfg->fifo_depth; in sun6i_spi_can_dma()
632 struct sun6i_spi *sspi; in sun6i_spi_probe() local
643 sspi = spi_controller_get_devdata(host); in sun6i_spi_probe()
645 sspi->base_addr = devm_platform_get_and_ioremap_resource(pdev, 0, &mem); in sun6i_spi_probe()
646 if (IS_ERR(sspi->base_addr)) { in sun6i_spi_probe()
647 ret = PTR_ERR(sspi->base_addr); in sun6i_spi_probe()
658 0, "sun6i-spi", sspi); in sun6i_spi_probe()
664 sspi->host = host; in sun6i_spi_probe()
665 sspi->cfg = of_device_get_match_data(&pdev->dev); in sun6i_spi_probe()
674 sspi->cfg->mode_bits; in sun6i_spi_probe()
680 sspi->hclk = devm_clk_get(&pdev->dev, "ahb"); in sun6i_spi_probe()
681 if (IS_ERR(sspi->hclk)) { in sun6i_spi_probe()
683 ret = PTR_ERR(sspi->hclk); in sun6i_spi_probe()
687 sspi->mclk = devm_clk_get(&pdev->dev, "mod"); in sun6i_spi_probe()
688 if (IS_ERR(sspi->mclk)) { in sun6i_spi_probe()
690 ret = PTR_ERR(sspi->mclk); in sun6i_spi_probe()
694 init_completion(&sspi->done); in sun6i_spi_probe()
695 init_completion(&sspi->dma_rx_done); in sun6i_spi_probe()
697 sspi->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL); in sun6i_spi_probe()
698 if (IS_ERR(sspi->rstc)) { in sun6i_spi_probe()
700 ret = PTR_ERR(sspi->rstc); in sun6i_spi_probe()
726 sspi->dma_addr_tx = mem->start + SUN6I_TXDATA_REG; in sun6i_spi_probe()
727 sspi->dma_addr_rx = mem->start + SUN6I_RXDATA_REG; in sun6i_spi_probe()