Lines Matching refs:i2c_dev
302 static void dvc_writel(struct tegra_i2c_dev *i2c_dev, u32 val, in dvc_writel() argument
305 writel_relaxed(val, i2c_dev->base + reg); in dvc_writel()
308 static u32 dvc_readl(struct tegra_i2c_dev *i2c_dev, unsigned int reg) in dvc_readl() argument
310 return readl_relaxed(i2c_dev->base + reg); in dvc_readl()
317 static u32 tegra_i2c_reg_addr(struct tegra_i2c_dev *i2c_dev, unsigned int reg) in tegra_i2c_reg_addr() argument
319 if (IS_DVC(i2c_dev)) in tegra_i2c_reg_addr()
321 else if (IS_VI(i2c_dev)) in tegra_i2c_reg_addr()
327 static void i2c_writel(struct tegra_i2c_dev *i2c_dev, u32 val, unsigned int reg) in i2c_writel() argument
329 writel_relaxed(val, i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg)); in i2c_writel()
333 readl_relaxed(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg)); in i2c_writel()
334 else if (IS_VI(i2c_dev)) in i2c_writel()
335 readl_relaxed(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, I2C_INT_STATUS)); in i2c_writel()
338 static u32 i2c_readl(struct tegra_i2c_dev *i2c_dev, unsigned int reg) in i2c_readl() argument
340 return readl_relaxed(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg)); in i2c_readl()
343 static void i2c_writesl(struct tegra_i2c_dev *i2c_dev, void *data, in i2c_writesl() argument
346 writesl(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg), data, len); in i2c_writesl()
349 static void i2c_writesl_vi(struct tegra_i2c_dev *i2c_dev, void *data, in i2c_writesl_vi() argument
361 i2c_writel(i2c_dev, *data32++, reg); in i2c_writesl_vi()
364 static void i2c_readsl(struct tegra_i2c_dev *i2c_dev, void *data, in i2c_readsl() argument
367 readsl(i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg), data, len); in i2c_readsl()
370 static void tegra_i2c_mask_irq(struct tegra_i2c_dev *i2c_dev, u32 mask) in tegra_i2c_mask_irq() argument
374 int_mask = i2c_readl(i2c_dev, I2C_INT_MASK) & ~mask; in tegra_i2c_mask_irq()
375 i2c_writel(i2c_dev, int_mask, I2C_INT_MASK); in tegra_i2c_mask_irq()
378 static void tegra_i2c_unmask_irq(struct tegra_i2c_dev *i2c_dev, u32 mask) in tegra_i2c_unmask_irq() argument
382 int_mask = i2c_readl(i2c_dev, I2C_INT_MASK) | mask; in tegra_i2c_unmask_irq()
383 i2c_writel(i2c_dev, int_mask, I2C_INT_MASK); in tegra_i2c_unmask_irq()
388 struct tegra_i2c_dev *i2c_dev = args; in tegra_i2c_dma_complete() local
390 complete(&i2c_dev->dma_complete); in tegra_i2c_dma_complete()
393 static int tegra_i2c_dma_submit(struct tegra_i2c_dev *i2c_dev, size_t len) in tegra_i2c_dma_submit() argument
398 dev_dbg(i2c_dev->dev, "starting DMA for length: %zu\n", len); in tegra_i2c_dma_submit()
400 reinit_completion(&i2c_dev->dma_complete); in tegra_i2c_dma_submit()
402 dir = i2c_dev->msg_read ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV; in tegra_i2c_dma_submit()
404 dma_desc = dmaengine_prep_slave_single(i2c_dev->dma_chan, i2c_dev->dma_phys, in tegra_i2c_dma_submit()
408 dev_err(i2c_dev->dev, "failed to get %s DMA descriptor\n", in tegra_i2c_dma_submit()
409 i2c_dev->msg_read ? "RX" : "TX"); in tegra_i2c_dma_submit()
414 dma_desc->callback_param = i2c_dev; in tegra_i2c_dma_submit()
417 dma_async_issue_pending(i2c_dev->dma_chan); in tegra_i2c_dma_submit()
422 static void tegra_i2c_release_dma(struct tegra_i2c_dev *i2c_dev) in tegra_i2c_release_dma() argument
424 if (i2c_dev->dma_buf) { in tegra_i2c_release_dma()
425 dma_free_coherent(i2c_dev->dma_dev, i2c_dev->dma_buf_size, in tegra_i2c_release_dma()
426 i2c_dev->dma_buf, i2c_dev->dma_phys); in tegra_i2c_release_dma()
427 i2c_dev->dma_buf = NULL; in tegra_i2c_release_dma()
430 if (i2c_dev->dma_chan) { in tegra_i2c_release_dma()
431 dma_release_channel(i2c_dev->dma_chan); in tegra_i2c_release_dma()
432 i2c_dev->dma_chan = NULL; in tegra_i2c_release_dma()
436 static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev) in tegra_i2c_init_dma() argument
442 if (IS_VI(i2c_dev)) in tegra_i2c_init_dma()
445 if (i2c_dev->hw->has_apb_dma) { in tegra_i2c_init_dma()
447 dev_dbg(i2c_dev->dev, "APB DMA support not enabled\n"); in tegra_i2c_init_dma()
451 dev_dbg(i2c_dev->dev, "GPC DMA support not enabled\n"); in tegra_i2c_init_dma()
460 i2c_dev->dma_chan = dma_request_chan(i2c_dev->dev, "tx"); in tegra_i2c_init_dma()
461 if (IS_ERR(i2c_dev->dma_chan)) { in tegra_i2c_init_dma()
462 err = PTR_ERR(i2c_dev->dma_chan); in tegra_i2c_init_dma()
463 i2c_dev->dma_chan = NULL; in tegra_i2c_init_dma()
467 i2c_dev->dma_dev = i2c_dev->dma_chan->device->dev; in tegra_i2c_init_dma()
468 i2c_dev->dma_buf_size = i2c_dev->hw->quirks->max_write_len + in tegra_i2c_init_dma()
471 dma_buf = dma_alloc_coherent(i2c_dev->dma_dev, i2c_dev->dma_buf_size, in tegra_i2c_init_dma()
474 dev_err(i2c_dev->dev, "failed to allocate DMA buffer\n"); in tegra_i2c_init_dma()
479 i2c_dev->dma_buf = dma_buf; in tegra_i2c_init_dma()
480 i2c_dev->dma_phys = dma_phys; in tegra_i2c_init_dma()
485 tegra_i2c_release_dma(i2c_dev); in tegra_i2c_init_dma()
487 dev_err(i2c_dev->dev, "cannot use DMA: %d\n", err); in tegra_i2c_init_dma()
488 dev_err(i2c_dev->dev, "falling back to PIO\n"); in tegra_i2c_init_dma()
502 static void tegra_dvc_init(struct tegra_i2c_dev *i2c_dev) in tegra_dvc_init() argument
506 val = dvc_readl(i2c_dev, DVC_CTRL_REG3); in tegra_dvc_init()
509 dvc_writel(i2c_dev, val, DVC_CTRL_REG3); in tegra_dvc_init()
511 val = dvc_readl(i2c_dev, DVC_CTRL_REG1); in tegra_dvc_init()
513 dvc_writel(i2c_dev, val, DVC_CTRL_REG1); in tegra_dvc_init()
516 static void tegra_i2c_vi_init(struct tegra_i2c_dev *i2c_dev) in tegra_i2c_vi_init() argument
522 i2c_writel(i2c_dev, value, I2C_INTERFACE_TIMING_0); in tegra_i2c_vi_init()
528 i2c_writel(i2c_dev, value, I2C_INTERFACE_TIMING_1); in tegra_i2c_vi_init()
532 i2c_writel(i2c_dev, value, I2C_HS_INTERFACE_TIMING_0); in tegra_i2c_vi_init()
537 i2c_writel(i2c_dev, value, I2C_HS_INTERFACE_TIMING_1); in tegra_i2c_vi_init()
540 i2c_writel(i2c_dev, value, I2C_BUS_CLEAR_CNFG); in tegra_i2c_vi_init()
542 i2c_writel(i2c_dev, 0x0, I2C_TLOW_SEXT); in tegra_i2c_vi_init()
545 static int tegra_i2c_poll_register(struct tegra_i2c_dev *i2c_dev, in tegra_i2c_poll_register() argument
549 void __iomem *addr = i2c_dev->base + tegra_i2c_reg_addr(i2c_dev, reg); in tegra_i2c_poll_register()
552 if (!i2c_dev->atomic_mode) in tegra_i2c_poll_register()
560 static int tegra_i2c_flush_fifos(struct tegra_i2c_dev *i2c_dev) in tegra_i2c_flush_fifos() argument
565 if (i2c_dev->hw->has_mst_fifo) { in tegra_i2c_flush_fifos()
575 val = i2c_readl(i2c_dev, offset); in tegra_i2c_flush_fifos()
577 i2c_writel(i2c_dev, val, offset); in tegra_i2c_flush_fifos()
579 err = tegra_i2c_poll_register(i2c_dev, offset, mask, 1000, 1000000); in tegra_i2c_flush_fifos()
581 dev_err(i2c_dev->dev, "failed to flush FIFO\n"); in tegra_i2c_flush_fifos()
588 static int tegra_i2c_wait_for_config_load(struct tegra_i2c_dev *i2c_dev) in tegra_i2c_wait_for_config_load() argument
592 if (!i2c_dev->hw->has_config_load_reg) in tegra_i2c_wait_for_config_load()
595 i2c_writel(i2c_dev, I2C_MSTR_CONFIG_LOAD, I2C_CONFIG_LOAD); in tegra_i2c_wait_for_config_load()
597 err = tegra_i2c_poll_register(i2c_dev, I2C_CONFIG_LOAD, 0xffffffff, in tegra_i2c_wait_for_config_load()
600 dev_err(i2c_dev->dev, "failed to load config\n"); in tegra_i2c_wait_for_config_load()
607 static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev) in tegra_i2c_init() argument
610 acpi_handle handle = ACPI_HANDLE(i2c_dev->dev); in tegra_i2c_init()
611 struct i2c_timings *t = &i2c_dev->timings; in tegra_i2c_init()
625 err = reset_control_reset(i2c_dev->rst); in tegra_i2c_init()
629 if (IS_DVC(i2c_dev)) in tegra_i2c_init()
630 tegra_dvc_init(i2c_dev); in tegra_i2c_init()
635 if (i2c_dev->hw->has_multi_master_mode) in tegra_i2c_init()
638 i2c_writel(i2c_dev, val, I2C_CNFG); in tegra_i2c_init()
639 i2c_writel(i2c_dev, 0, I2C_INT_MASK); in tegra_i2c_init()
641 if (IS_VI(i2c_dev)) in tegra_i2c_init()
642 tegra_i2c_vi_init(i2c_dev); in tegra_i2c_init()
647 tlow = i2c_dev->hw->tlow_fast_fastplus_mode; in tegra_i2c_init()
648 thigh = i2c_dev->hw->thigh_fast_fastplus_mode; in tegra_i2c_init()
649 tsu_thd = i2c_dev->hw->setup_hold_time_fast_fast_plus_mode; in tegra_i2c_init()
652 non_hs_mode = i2c_dev->hw->clk_divisor_fast_plus_mode; in tegra_i2c_init()
654 non_hs_mode = i2c_dev->hw->clk_divisor_fast_mode; in tegra_i2c_init()
658 tlow = i2c_dev->hw->tlow_std_mode; in tegra_i2c_init()
659 thigh = i2c_dev->hw->thigh_std_mode; in tegra_i2c_init()
660 tsu_thd = i2c_dev->hw->setup_hold_time_std_mode; in tegra_i2c_init()
661 non_hs_mode = i2c_dev->hw->clk_divisor_std_mode; in tegra_i2c_init()
667 i2c_dev->hw->clk_divisor_hs_mode) | in tegra_i2c_init()
669 i2c_writel(i2c_dev, clk_divisor, I2C_CLK_DIVISOR); in tegra_i2c_init()
671 if (i2c_dev->hw->has_interface_timing_reg) { in tegra_i2c_init()
674 i2c_writel(i2c_dev, val, I2C_INTERFACE_TIMING_0); in tegra_i2c_init()
681 if (i2c_dev->hw->has_interface_timing_reg && tsu_thd) in tegra_i2c_init()
682 i2c_writel(i2c_dev, tsu_thd, I2C_INTERFACE_TIMING_1); in tegra_i2c_init()
686 err = clk_set_rate(i2c_dev->div_clk, in tegra_i2c_init()
689 dev_err(i2c_dev->dev, "failed to set div-clk rate: %d\n", err); in tegra_i2c_init()
693 if (!IS_DVC(i2c_dev) && !IS_VI(i2c_dev)) { in tegra_i2c_init()
694 u32 sl_cfg = i2c_readl(i2c_dev, I2C_SL_CNFG); in tegra_i2c_init()
697 i2c_writel(i2c_dev, sl_cfg, I2C_SL_CNFG); in tegra_i2c_init()
698 i2c_writel(i2c_dev, 0xfc, I2C_SL_ADDR1); in tegra_i2c_init()
699 i2c_writel(i2c_dev, 0x00, I2C_SL_ADDR2); in tegra_i2c_init()
702 err = tegra_i2c_flush_fifos(i2c_dev); in tegra_i2c_init()
706 if (i2c_dev->multimaster_mode && i2c_dev->hw->has_slcg_override_reg) in tegra_i2c_init()
707 i2c_writel(i2c_dev, I2C_MST_CORE_CLKEN_OVR, I2C_CLKEN_OVERRIDE); in tegra_i2c_init()
709 err = tegra_i2c_wait_for_config_load(i2c_dev); in tegra_i2c_init()
716 static int tegra_i2c_disable_packet_mode(struct tegra_i2c_dev *i2c_dev) in tegra_i2c_disable_packet_mode() argument
726 udelay(DIV_ROUND_UP(2 * 1000000, i2c_dev->timings.bus_freq_hz)); in tegra_i2c_disable_packet_mode()
728 cnfg = i2c_readl(i2c_dev, I2C_CNFG); in tegra_i2c_disable_packet_mode()
730 i2c_writel(i2c_dev, cnfg & ~I2C_CNFG_PACKET_MODE_EN, I2C_CNFG); in tegra_i2c_disable_packet_mode()
732 return tegra_i2c_wait_for_config_load(i2c_dev); in tegra_i2c_disable_packet_mode()
735 static int tegra_i2c_empty_rx_fifo(struct tegra_i2c_dev *i2c_dev) in tegra_i2c_empty_rx_fifo() argument
737 size_t buf_remaining = i2c_dev->msg_buf_remaining; in tegra_i2c_empty_rx_fifo()
739 u8 *buf = i2c_dev->msg_buf; in tegra_i2c_empty_rx_fifo()
746 if (WARN_ON_ONCE(!(i2c_dev->msg_buf_remaining))) in tegra_i2c_empty_rx_fifo()
749 if (i2c_dev->hw->has_mst_fifo) { in tegra_i2c_empty_rx_fifo()
750 val = i2c_readl(i2c_dev, I2C_MST_FIFO_STATUS); in tegra_i2c_empty_rx_fifo()
753 val = i2c_readl(i2c_dev, I2C_FIFO_STATUS); in tegra_i2c_empty_rx_fifo()
762 i2c_readsl(i2c_dev, buf, I2C_RX_FIFO, words_to_transfer); in tegra_i2c_empty_rx_fifo()
778 val = i2c_readl(i2c_dev, I2C_RX_FIFO); in tegra_i2c_empty_rx_fifo()
789 i2c_dev->msg_buf_remaining = buf_remaining; in tegra_i2c_empty_rx_fifo()
790 i2c_dev->msg_buf = buf; in tegra_i2c_empty_rx_fifo()
795 static int tegra_i2c_fill_tx_fifo(struct tegra_i2c_dev *i2c_dev) in tegra_i2c_fill_tx_fifo() argument
797 size_t buf_remaining = i2c_dev->msg_buf_remaining; in tegra_i2c_fill_tx_fifo()
799 u8 *buf = i2c_dev->msg_buf; in tegra_i2c_fill_tx_fifo()
802 if (i2c_dev->hw->has_mst_fifo) { in tegra_i2c_fill_tx_fifo()
803 val = i2c_readl(i2c_dev, I2C_MST_FIFO_STATUS); in tegra_i2c_fill_tx_fifo()
806 val = i2c_readl(i2c_dev, I2C_FIFO_STATUS); in tegra_i2c_fill_tx_fifo()
833 i2c_dev->msg_buf_remaining = buf_remaining; in tegra_i2c_fill_tx_fifo()
834 i2c_dev->msg_buf = buf + words_to_transfer * BYTES_PER_FIFO_WORD; in tegra_i2c_fill_tx_fifo()
836 if (IS_VI(i2c_dev)) in tegra_i2c_fill_tx_fifo()
837 i2c_writesl_vi(i2c_dev, buf, I2C_TX_FIFO, words_to_transfer); in tegra_i2c_fill_tx_fifo()
839 i2c_writesl(i2c_dev, buf, I2C_TX_FIFO, words_to_transfer); in tegra_i2c_fill_tx_fifo()
858 i2c_dev->msg_buf_remaining = 0; in tegra_i2c_fill_tx_fifo()
859 i2c_dev->msg_buf = NULL; in tegra_i2c_fill_tx_fifo()
861 i2c_writel(i2c_dev, val, I2C_TX_FIFO); in tegra_i2c_fill_tx_fifo()
870 struct tegra_i2c_dev *i2c_dev = dev_id; in tegra_i2c_isr() local
873 status = i2c_readl(i2c_dev, I2C_INT_STATUS); in tegra_i2c_isr()
876 dev_warn(i2c_dev->dev, "IRQ status 0 %08x %08x %08x\n", in tegra_i2c_isr()
877 i2c_readl(i2c_dev, I2C_PACKET_TRANSFER_STATUS), in tegra_i2c_isr()
878 i2c_readl(i2c_dev, I2C_STATUS), in tegra_i2c_isr()
879 i2c_readl(i2c_dev, I2C_CNFG)); in tegra_i2c_isr()
880 i2c_dev->msg_err |= I2C_ERR_UNKNOWN_INTERRUPT; in tegra_i2c_isr()
885 tegra_i2c_disable_packet_mode(i2c_dev); in tegra_i2c_isr()
887 i2c_dev->msg_err |= I2C_ERR_NO_ACK; in tegra_i2c_isr()
889 i2c_dev->msg_err |= I2C_ERR_ARBITRATION_LOST; in tegra_i2c_isr()
897 if (i2c_dev->hw->supports_bus_clear && (status & I2C_INT_BUS_CLR_DONE)) in tegra_i2c_isr()
900 if (!i2c_dev->dma_mode) { in tegra_i2c_isr()
901 if (i2c_dev->msg_read && (status & I2C_INT_RX_FIFO_DATA_REQ)) { in tegra_i2c_isr()
902 if (tegra_i2c_empty_rx_fifo(i2c_dev)) { in tegra_i2c_isr()
908 i2c_dev->msg_err |= I2C_ERR_RX_BUFFER_OVERFLOW; in tegra_i2c_isr()
913 if (!i2c_dev->msg_read && (status & I2C_INT_TX_FIFO_DATA_REQ)) { in tegra_i2c_isr()
914 if (i2c_dev->msg_buf_remaining) in tegra_i2c_isr()
915 tegra_i2c_fill_tx_fifo(i2c_dev); in tegra_i2c_isr()
917 tegra_i2c_mask_irq(i2c_dev, in tegra_i2c_isr()
922 i2c_writel(i2c_dev, status, I2C_INT_STATUS); in tegra_i2c_isr()
923 if (IS_DVC(i2c_dev)) in tegra_i2c_isr()
924 dvc_writel(i2c_dev, DVC_STATUS_I2C_DONE_INTR, DVC_STATUS); in tegra_i2c_isr()
935 if (i2c_dev->dma_mode) in tegra_i2c_isr()
936 i2c_dev->msg_buf_remaining = 0; in tegra_i2c_isr()
941 if (WARN_ON_ONCE(i2c_dev->msg_buf_remaining)) { in tegra_i2c_isr()
942 i2c_dev->msg_err |= I2C_ERR_UNKNOWN_INTERRUPT; in tegra_i2c_isr()
945 complete(&i2c_dev->msg_complete); in tegra_i2c_isr()
950 tegra_i2c_mask_irq(i2c_dev, in tegra_i2c_isr()
957 if (i2c_dev->hw->supports_bus_clear) in tegra_i2c_isr()
958 tegra_i2c_mask_irq(i2c_dev, I2C_INT_BUS_CLR_DONE); in tegra_i2c_isr()
960 i2c_writel(i2c_dev, status, I2C_INT_STATUS); in tegra_i2c_isr()
962 if (IS_DVC(i2c_dev)) in tegra_i2c_isr()
963 dvc_writel(i2c_dev, DVC_STATUS_I2C_DONE_INTR, DVC_STATUS); in tegra_i2c_isr()
965 if (i2c_dev->dma_mode) { in tegra_i2c_isr()
966 dmaengine_terminate_async(i2c_dev->dma_chan); in tegra_i2c_isr()
967 complete(&i2c_dev->dma_complete); in tegra_i2c_isr()
970 complete(&i2c_dev->msg_complete); in tegra_i2c_isr()
975 static void tegra_i2c_config_fifo_trig(struct tegra_i2c_dev *i2c_dev, in tegra_i2c_config_fifo_trig() argument
982 if (i2c_dev->hw->has_mst_fifo) in tegra_i2c_config_fifo_trig()
987 if (i2c_dev->dma_mode) { in tegra_i2c_config_fifo_trig()
995 if (i2c_dev->msg_read) { in tegra_i2c_config_fifo_trig()
996 reg_offset = tegra_i2c_reg_addr(i2c_dev, I2C_RX_FIFO); in tegra_i2c_config_fifo_trig()
998 slv_config.src_addr = i2c_dev->base_phys + reg_offset; in tegra_i2c_config_fifo_trig()
1002 if (i2c_dev->hw->has_mst_fifo) in tegra_i2c_config_fifo_trig()
1007 reg_offset = tegra_i2c_reg_addr(i2c_dev, I2C_TX_FIFO); in tegra_i2c_config_fifo_trig()
1009 slv_config.dst_addr = i2c_dev->base_phys + reg_offset; in tegra_i2c_config_fifo_trig()
1013 if (i2c_dev->hw->has_mst_fifo) in tegra_i2c_config_fifo_trig()
1020 err = dmaengine_slave_config(i2c_dev->dma_chan, &slv_config); in tegra_i2c_config_fifo_trig()
1022 dev_err(i2c_dev->dev, "DMA config failed: %d\n", err); in tegra_i2c_config_fifo_trig()
1023 dev_err(i2c_dev->dev, "falling back to PIO\n"); in tegra_i2c_config_fifo_trig()
1025 tegra_i2c_release_dma(i2c_dev); in tegra_i2c_config_fifo_trig()
1026 i2c_dev->dma_mode = false; in tegra_i2c_config_fifo_trig()
1032 if (i2c_dev->hw->has_mst_fifo) in tegra_i2c_config_fifo_trig()
1039 i2c_writel(i2c_dev, val, reg); in tegra_i2c_config_fifo_trig()
1042 static unsigned long tegra_i2c_poll_completion(struct tegra_i2c_dev *i2c_dev, in tegra_i2c_poll_completion() argument
1050 u32 status = i2c_readl(i2c_dev, I2C_INT_STATUS); in tegra_i2c_poll_completion()
1053 tegra_i2c_isr(i2c_dev->irq, i2c_dev); in tegra_i2c_poll_completion()
1068 static unsigned long tegra_i2c_wait_completion(struct tegra_i2c_dev *i2c_dev, in tegra_i2c_wait_completion() argument
1074 if (i2c_dev->atomic_mode) { in tegra_i2c_wait_completion()
1075 ret = tegra_i2c_poll_completion(i2c_dev, complete, timeout_ms); in tegra_i2c_wait_completion()
1077 enable_irq(i2c_dev->irq); in tegra_i2c_wait_completion()
1080 disable_irq(i2c_dev->irq); in tegra_i2c_wait_completion()
1093 ret = tegra_i2c_poll_completion(i2c_dev, complete, 0); in tegra_i2c_wait_completion()
1101 struct tegra_i2c_dev *i2c_dev = i2c_get_adapdata(adap); in tegra_i2c_issue_bus_clear() local
1105 reinit_completion(&i2c_dev->msg_complete); in tegra_i2c_issue_bus_clear()
1109 i2c_writel(i2c_dev, val, I2C_BUS_CLEAR_CNFG); in tegra_i2c_issue_bus_clear()
1111 err = tegra_i2c_wait_for_config_load(i2c_dev); in tegra_i2c_issue_bus_clear()
1116 i2c_writel(i2c_dev, val, I2C_BUS_CLEAR_CNFG); in tegra_i2c_issue_bus_clear()
1117 tegra_i2c_unmask_irq(i2c_dev, I2C_INT_BUS_CLR_DONE); in tegra_i2c_issue_bus_clear()
1119 time_left = tegra_i2c_wait_completion(i2c_dev, &i2c_dev->msg_complete, 50); in tegra_i2c_issue_bus_clear()
1120 tegra_i2c_mask_irq(i2c_dev, I2C_INT_BUS_CLR_DONE); in tegra_i2c_issue_bus_clear()
1123 dev_err(i2c_dev->dev, "failed to clear bus\n"); in tegra_i2c_issue_bus_clear()
1127 val = i2c_readl(i2c_dev, I2C_BUS_CLEAR_STATUS); in tegra_i2c_issue_bus_clear()
1129 dev_err(i2c_dev->dev, "un-recovered arbitration lost\n"); in tegra_i2c_issue_bus_clear()
1136 static void tegra_i2c_push_packet_header(struct tegra_i2c_dev *i2c_dev, in tegra_i2c_push_packet_header() argument
1140 u32 *dma_buf = i2c_dev->dma_buf; in tegra_i2c_push_packet_header()
1146 FIELD_PREP(PACKET_HEADER0_CONT_ID, i2c_dev->cont_id) | in tegra_i2c_push_packet_header()
1149 if (i2c_dev->dma_mode && !i2c_dev->msg_read) in tegra_i2c_push_packet_header()
1152 i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO); in tegra_i2c_push_packet_header()
1154 packet_header = i2c_dev->msg_len - 1; in tegra_i2c_push_packet_header()
1156 if (i2c_dev->dma_mode && !i2c_dev->msg_read) in tegra_i2c_push_packet_header()
1159 i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO); in tegra_i2c_push_packet_header()
1181 if (i2c_dev->dma_mode && !i2c_dev->msg_read) in tegra_i2c_push_packet_header()
1184 i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO); in tegra_i2c_push_packet_header()
1187 static int tegra_i2c_error_recover(struct tegra_i2c_dev *i2c_dev, in tegra_i2c_error_recover() argument
1190 if (i2c_dev->msg_err == I2C_ERR_NONE) in tegra_i2c_error_recover()
1193 tegra_i2c_init(i2c_dev); in tegra_i2c_error_recover()
1196 if (i2c_dev->msg_err == I2C_ERR_ARBITRATION_LOST) { in tegra_i2c_error_recover()
1197 if (!i2c_dev->multimaster_mode) in tegra_i2c_error_recover()
1198 return i2c_recover_bus(&i2c_dev->adapter); in tegra_i2c_error_recover()
1203 if (i2c_dev->msg_err == I2C_ERR_NO_ACK) { in tegra_i2c_error_recover()
1213 static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, in tegra_i2c_xfer_msg() argument
1222 err = tegra_i2c_flush_fifos(i2c_dev); in tegra_i2c_xfer_msg()
1226 i2c_dev->msg_buf = msg->buf; in tegra_i2c_xfer_msg()
1227 i2c_dev->msg_len = msg->len; in tegra_i2c_xfer_msg()
1229 i2c_dev->msg_err = I2C_ERR_NONE; in tegra_i2c_xfer_msg()
1230 i2c_dev->msg_read = !!(msg->flags & I2C_M_RD); in tegra_i2c_xfer_msg()
1231 reinit_completion(&i2c_dev->msg_complete); in tegra_i2c_xfer_msg()
1240 i2c_dev->msg_len = 1; in tegra_i2c_xfer_msg()
1242 i2c_dev->msg_buf += 1; in tegra_i2c_xfer_msg()
1243 i2c_dev->msg_len -= 1; in tegra_i2c_xfer_msg()
1247 i2c_dev->msg_buf_remaining = i2c_dev->msg_len; in tegra_i2c_xfer_msg()
1249 if (i2c_dev->msg_read) in tegra_i2c_xfer_msg()
1250 xfer_size = i2c_dev->msg_len; in tegra_i2c_xfer_msg()
1252 xfer_size = i2c_dev->msg_len + I2C_PACKET_HEADER_SIZE; in tegra_i2c_xfer_msg()
1256 i2c_dev->dma_mode = xfer_size > I2C_PIO_MODE_PREFERRED_LEN && in tegra_i2c_xfer_msg()
1257 i2c_dev->dma_buf && !i2c_dev->atomic_mode; in tegra_i2c_xfer_msg()
1259 tegra_i2c_config_fifo_trig(i2c_dev, xfer_size); in tegra_i2c_xfer_msg()
1266 i2c_dev->timings.bus_freq_hz); in tegra_i2c_xfer_msg()
1269 tegra_i2c_unmask_irq(i2c_dev, int_mask); in tegra_i2c_xfer_msg()
1271 if (i2c_dev->dma_mode) { in tegra_i2c_xfer_msg()
1272 if (i2c_dev->msg_read) { in tegra_i2c_xfer_msg()
1273 dma_sync_single_for_device(i2c_dev->dma_dev, in tegra_i2c_xfer_msg()
1274 i2c_dev->dma_phys, in tegra_i2c_xfer_msg()
1277 err = tegra_i2c_dma_submit(i2c_dev, xfer_size); in tegra_i2c_xfer_msg()
1281 dma_sync_single_for_cpu(i2c_dev->dma_dev, in tegra_i2c_xfer_msg()
1282 i2c_dev->dma_phys, in tegra_i2c_xfer_msg()
1287 tegra_i2c_push_packet_header(i2c_dev, msg, end_state); in tegra_i2c_xfer_msg()
1289 if (!i2c_dev->msg_read) { in tegra_i2c_xfer_msg()
1290 if (i2c_dev->dma_mode) { in tegra_i2c_xfer_msg()
1291 memcpy(i2c_dev->dma_buf + I2C_PACKET_HEADER_SIZE, in tegra_i2c_xfer_msg()
1292 msg->buf, i2c_dev->msg_len); in tegra_i2c_xfer_msg()
1294 dma_sync_single_for_device(i2c_dev->dma_dev, in tegra_i2c_xfer_msg()
1295 i2c_dev->dma_phys, in tegra_i2c_xfer_msg()
1298 err = tegra_i2c_dma_submit(i2c_dev, xfer_size); in tegra_i2c_xfer_msg()
1302 tegra_i2c_fill_tx_fifo(i2c_dev); in tegra_i2c_xfer_msg()
1306 if (i2c_dev->hw->has_per_pkt_xfer_complete_irq) in tegra_i2c_xfer_msg()
1309 if (!i2c_dev->dma_mode) { in tegra_i2c_xfer_msg()
1312 else if (i2c_dev->msg_buf_remaining) in tegra_i2c_xfer_msg()
1316 tegra_i2c_unmask_irq(i2c_dev, int_mask); in tegra_i2c_xfer_msg()
1317 dev_dbg(i2c_dev->dev, "unmasked IRQ: %02x\n", in tegra_i2c_xfer_msg()
1318 i2c_readl(i2c_dev, I2C_INT_MASK)); in tegra_i2c_xfer_msg()
1320 if (i2c_dev->dma_mode) { in tegra_i2c_xfer_msg()
1321 time_left = tegra_i2c_wait_completion(i2c_dev, in tegra_i2c_xfer_msg()
1322 &i2c_dev->dma_complete, in tegra_i2c_xfer_msg()
1330 dmaengine_synchronize(i2c_dev->dma_chan); in tegra_i2c_xfer_msg()
1331 dmaengine_terminate_sync(i2c_dev->dma_chan); in tegra_i2c_xfer_msg()
1333 if (!time_left && !completion_done(&i2c_dev->dma_complete)) { in tegra_i2c_xfer_msg()
1334 dev_err(i2c_dev->dev, "DMA transfer timed out\n"); in tegra_i2c_xfer_msg()
1335 tegra_i2c_init(i2c_dev); in tegra_i2c_xfer_msg()
1339 if (i2c_dev->msg_read && i2c_dev->msg_err == I2C_ERR_NONE) { in tegra_i2c_xfer_msg()
1340 dma_sync_single_for_cpu(i2c_dev->dma_dev, in tegra_i2c_xfer_msg()
1341 i2c_dev->dma_phys, in tegra_i2c_xfer_msg()
1344 memcpy(i2c_dev->msg_buf, i2c_dev->dma_buf, i2c_dev->msg_len); in tegra_i2c_xfer_msg()
1348 time_left = tegra_i2c_wait_completion(i2c_dev, &i2c_dev->msg_complete, in tegra_i2c_xfer_msg()
1351 tegra_i2c_mask_irq(i2c_dev, int_mask); in tegra_i2c_xfer_msg()
1354 dev_err(i2c_dev->dev, "I2C transfer timed out\n"); in tegra_i2c_xfer_msg()
1355 tegra_i2c_init(i2c_dev); in tegra_i2c_xfer_msg()
1359 dev_dbg(i2c_dev->dev, "transfer complete: %lu %d %d\n", in tegra_i2c_xfer_msg()
1360 time_left, completion_done(&i2c_dev->msg_complete), in tegra_i2c_xfer_msg()
1361 i2c_dev->msg_err); in tegra_i2c_xfer_msg()
1363 i2c_dev->dma_mode = false; in tegra_i2c_xfer_msg()
1365 err = tegra_i2c_error_recover(i2c_dev, msg); in tegra_i2c_xfer_msg()
1375 struct tegra_i2c_dev *i2c_dev = i2c_get_adapdata(adap); in tegra_i2c_xfer() local
1378 ret = pm_runtime_get_sync(i2c_dev->dev); in tegra_i2c_xfer()
1380 dev_err(i2c_dev->dev, "runtime resume failed %d\n", ret); in tegra_i2c_xfer()
1381 pm_runtime_put_noidle(i2c_dev->dev); in tegra_i2c_xfer()
1397 ret = tegra_i2c_xfer_msg(i2c_dev, &msgs[i], MSG_END_CONTINUE); in tegra_i2c_xfer()
1402 dev_dbg(i2c_dev->dev, "reading %d bytes\n", msgs[i].len); in tegra_i2c_xfer()
1404 ret = tegra_i2c_xfer_msg(i2c_dev, &msgs[i], end_type); in tegra_i2c_xfer()
1409 pm_runtime_put(i2c_dev->dev); in tegra_i2c_xfer()
1417 struct tegra_i2c_dev *i2c_dev = i2c_get_adapdata(adap); in tegra_i2c_xfer_atomic() local
1420 i2c_dev->atomic_mode = true; in tegra_i2c_xfer_atomic()
1422 i2c_dev->atomic_mode = false; in tegra_i2c_xfer_atomic()
1429 struct tegra_i2c_dev *i2c_dev = i2c_get_adapdata(adap); in tegra_i2c_func() local
1433 if (i2c_dev->hw->has_continue_xfer_support) in tegra_i2c_func()
1647 static void tegra_i2c_parse_dt(struct tegra_i2c_dev *i2c_dev) in tegra_i2c_parse_dt() argument
1649 struct device_node *np = i2c_dev->dev->of_node; in tegra_i2c_parse_dt()
1652 i2c_parse_fw_timings(i2c_dev->dev, &i2c_dev->timings, true); in tegra_i2c_parse_dt()
1654 multi_mode = device_property_read_bool(i2c_dev->dev, "multi-master"); in tegra_i2c_parse_dt()
1655 i2c_dev->multimaster_mode = multi_mode; in tegra_i2c_parse_dt()
1659 i2c_dev->is_dvc = true; in tegra_i2c_parse_dt()
1663 i2c_dev->is_vi = true; in tegra_i2c_parse_dt()
1666 static int tegra_i2c_init_reset(struct tegra_i2c_dev *i2c_dev) in tegra_i2c_init_reset() argument
1668 if (ACPI_HANDLE(i2c_dev->dev)) in tegra_i2c_init_reset()
1671 i2c_dev->rst = devm_reset_control_get_exclusive(i2c_dev->dev, "i2c"); in tegra_i2c_init_reset()
1672 if (IS_ERR(i2c_dev->rst)) in tegra_i2c_init_reset()
1673 return dev_err_probe(i2c_dev->dev, PTR_ERR(i2c_dev->rst), in tegra_i2c_init_reset()
1679 static int tegra_i2c_init_clocks(struct tegra_i2c_dev *i2c_dev) in tegra_i2c_init_clocks() argument
1683 if (ACPI_HANDLE(i2c_dev->dev)) in tegra_i2c_init_clocks()
1686 i2c_dev->clocks[i2c_dev->nclocks++].id = "div-clk"; in tegra_i2c_init_clocks()
1688 if (i2c_dev->hw == &tegra20_i2c_hw || i2c_dev->hw == &tegra30_i2c_hw) in tegra_i2c_init_clocks()
1689 i2c_dev->clocks[i2c_dev->nclocks++].id = "fast-clk"; in tegra_i2c_init_clocks()
1691 if (IS_VI(i2c_dev)) in tegra_i2c_init_clocks()
1692 i2c_dev->clocks[i2c_dev->nclocks++].id = "slow"; in tegra_i2c_init_clocks()
1694 err = devm_clk_bulk_get(i2c_dev->dev, i2c_dev->nclocks, in tegra_i2c_init_clocks()
1695 i2c_dev->clocks); in tegra_i2c_init_clocks()
1699 err = clk_bulk_prepare(i2c_dev->nclocks, i2c_dev->clocks); in tegra_i2c_init_clocks()
1703 i2c_dev->div_clk = i2c_dev->clocks[0].clk; in tegra_i2c_init_clocks()
1705 if (!i2c_dev->multimaster_mode) in tegra_i2c_init_clocks()
1708 err = clk_enable(i2c_dev->div_clk); in tegra_i2c_init_clocks()
1710 dev_err(i2c_dev->dev, "failed to enable div-clk: %d\n", err); in tegra_i2c_init_clocks()
1717 clk_bulk_unprepare(i2c_dev->nclocks, i2c_dev->clocks); in tegra_i2c_init_clocks()
1722 static void tegra_i2c_release_clocks(struct tegra_i2c_dev *i2c_dev) in tegra_i2c_release_clocks() argument
1724 if (i2c_dev->multimaster_mode) in tegra_i2c_release_clocks()
1725 clk_disable(i2c_dev->div_clk); in tegra_i2c_release_clocks()
1727 clk_bulk_unprepare(i2c_dev->nclocks, i2c_dev->clocks); in tegra_i2c_release_clocks()
1730 static int tegra_i2c_init_hardware(struct tegra_i2c_dev *i2c_dev) in tegra_i2c_init_hardware() argument
1734 ret = pm_runtime_get_sync(i2c_dev->dev); in tegra_i2c_init_hardware()
1736 dev_err(i2c_dev->dev, "runtime resume failed: %d\n", ret); in tegra_i2c_init_hardware()
1738 ret = tegra_i2c_init(i2c_dev); in tegra_i2c_init_hardware()
1740 pm_runtime_put_sync(i2c_dev->dev); in tegra_i2c_init_hardware()
1747 struct tegra_i2c_dev *i2c_dev; in tegra_i2c_probe() local
1751 i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL); in tegra_i2c_probe()
1752 if (!i2c_dev) in tegra_i2c_probe()
1755 platform_set_drvdata(pdev, i2c_dev); in tegra_i2c_probe()
1757 init_completion(&i2c_dev->msg_complete); in tegra_i2c_probe()
1758 init_completion(&i2c_dev->dma_complete); in tegra_i2c_probe()
1760 i2c_dev->hw = device_get_match_data(&pdev->dev); in tegra_i2c_probe()
1761 i2c_dev->cont_id = pdev->id; in tegra_i2c_probe()
1762 i2c_dev->dev = &pdev->dev; in tegra_i2c_probe()
1764 i2c_dev->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); in tegra_i2c_probe()
1765 if (IS_ERR(i2c_dev->base)) in tegra_i2c_probe()
1766 return PTR_ERR(i2c_dev->base); in tegra_i2c_probe()
1768 i2c_dev->base_phys = res->start; in tegra_i2c_probe()
1774 i2c_dev->irq = err; in tegra_i2c_probe()
1777 irq_set_status_flags(i2c_dev->irq, IRQ_NOAUTOEN); in tegra_i2c_probe()
1779 err = devm_request_threaded_irq(i2c_dev->dev, i2c_dev->irq, in tegra_i2c_probe()
1782 dev_name(i2c_dev->dev), i2c_dev); in tegra_i2c_probe()
1786 tegra_i2c_parse_dt(i2c_dev); in tegra_i2c_probe()
1788 err = tegra_i2c_init_reset(i2c_dev); in tegra_i2c_probe()
1792 err = tegra_i2c_init_clocks(i2c_dev); in tegra_i2c_probe()
1796 err = tegra_i2c_init_dma(i2c_dev); in tegra_i2c_probe()
1809 if (!IS_VI(i2c_dev) && !has_acpi_companion(i2c_dev->dev)) in tegra_i2c_probe()
1810 pm_runtime_irq_safe(i2c_dev->dev); in tegra_i2c_probe()
1812 pm_runtime_enable(i2c_dev->dev); in tegra_i2c_probe()
1814 err = tegra_i2c_init_hardware(i2c_dev); in tegra_i2c_probe()
1818 i2c_set_adapdata(&i2c_dev->adapter, i2c_dev); in tegra_i2c_probe()
1819 i2c_dev->adapter.dev.of_node = i2c_dev->dev->of_node; in tegra_i2c_probe()
1820 i2c_dev->adapter.dev.parent = i2c_dev->dev; in tegra_i2c_probe()
1821 i2c_dev->adapter.retries = 1; in tegra_i2c_probe()
1822 i2c_dev->adapter.timeout = 6 * HZ; in tegra_i2c_probe()
1823 i2c_dev->adapter.quirks = i2c_dev->hw->quirks; in tegra_i2c_probe()
1824 i2c_dev->adapter.owner = THIS_MODULE; in tegra_i2c_probe()
1825 i2c_dev->adapter.class = I2C_CLASS_DEPRECATED; in tegra_i2c_probe()
1826 i2c_dev->adapter.algo = &tegra_i2c_algo; in tegra_i2c_probe()
1827 i2c_dev->adapter.nr = pdev->id; in tegra_i2c_probe()
1828 ACPI_COMPANION_SET(&i2c_dev->adapter.dev, ACPI_COMPANION(&pdev->dev)); in tegra_i2c_probe()
1830 if (i2c_dev->hw->supports_bus_clear) in tegra_i2c_probe()
1831 i2c_dev->adapter.bus_recovery_info = &tegra_i2c_recovery_info; in tegra_i2c_probe()
1833 strscpy(i2c_dev->adapter.name, dev_name(i2c_dev->dev), in tegra_i2c_probe()
1834 sizeof(i2c_dev->adapter.name)); in tegra_i2c_probe()
1836 err = i2c_add_numbered_adapter(&i2c_dev->adapter); in tegra_i2c_probe()
1843 pm_runtime_disable(i2c_dev->dev); in tegra_i2c_probe()
1845 tegra_i2c_release_dma(i2c_dev); in tegra_i2c_probe()
1847 tegra_i2c_release_clocks(i2c_dev); in tegra_i2c_probe()
1854 struct tegra_i2c_dev *i2c_dev = platform_get_drvdata(pdev); in tegra_i2c_remove() local
1856 i2c_del_adapter(&i2c_dev->adapter); in tegra_i2c_remove()
1857 pm_runtime_force_suspend(i2c_dev->dev); in tegra_i2c_remove()
1859 tegra_i2c_release_dma(i2c_dev); in tegra_i2c_remove()
1860 tegra_i2c_release_clocks(i2c_dev); in tegra_i2c_remove()
1865 struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev); in tegra_i2c_runtime_resume() local
1872 err = clk_bulk_enable(i2c_dev->nclocks, i2c_dev->clocks); in tegra_i2c_runtime_resume()
1881 if (IS_VI(i2c_dev)) { in tegra_i2c_runtime_resume()
1882 err = tegra_i2c_init(i2c_dev); in tegra_i2c_runtime_resume()
1890 clk_bulk_disable(i2c_dev->nclocks, i2c_dev->clocks); in tegra_i2c_runtime_resume()
1897 struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev); in tegra_i2c_runtime_suspend() local
1899 clk_bulk_disable(i2c_dev->nclocks, i2c_dev->clocks); in tegra_i2c_runtime_suspend()
1906 struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev); in tegra_i2c_suspend() local
1909 i2c_mark_adapter_suspended(&i2c_dev->adapter); in tegra_i2c_suspend()
1922 struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev); in tegra_i2c_resume() local
1933 err = tegra_i2c_init(i2c_dev); in tegra_i2c_resume()
1948 i2c_mark_adapter_resumed(&i2c_dev->adapter); in tegra_i2c_resume()