19 #include "hci.h"
29 #define HCI_VERSION			0x00	/* HCI Version (in BCD) */
120 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_bus_init()  local
126 	if (hci->cmd == &mipi_i3c_hci_cmd_v1) {  in i3c_hci_bus_init()
127 		ret = mipi_i3c_hci_dat_v1.init(hci);  in i3c_hci_bus_init()
143 	ret = hci->io->init(hci);  in i3c_hci_bus_init()
148 	if (hci->quirks & HCI_QUIRK_RESP_BUF_THLD)  in i3c_hci_bus_init()
149 		amd_set_resp_buf_thld(hci);  in i3c_hci_bus_init()
159 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_bus_cleanup()  local
166 	hci->io->cleanup(hci);  in i3c_hci_bus_cleanup()
167 	if (hci->cmd == &mipi_i3c_hci_cmd_v1)  in i3c_hci_bus_cleanup()
168 		mipi_i3c_hci_dat_v1.cleanup(hci);  in i3c_hci_bus_cleanup()
171 void mipi_i3c_hci_resume(struct i3c_hci *hci)  in mipi_i3c_hci_resume()  argument
177 void mipi_i3c_hci_pio_reset(struct i3c_hci *hci)  in mipi_i3c_hci_pio_reset()  argument
183 void mipi_i3c_hci_dct_index_reset(struct i3c_hci *hci)  in mipi_i3c_hci_dct_index_reset()  argument
191 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_send_ccc_cmd()  local
193 	bool raw = !!(hci->quirks & HCI_QUIRK_RAW_CCC);  in i3c_hci_send_ccc_cmd()
210 		hci->cmd->prep_ccc(hci, xfer, I3C_BROADCAST_ADDR,  in i3c_hci_send_ccc_cmd()
219 		ret = hci->cmd->prep_ccc(hci, &xfer[i], ccc->dests[i].addr,  in i3c_hci_send_ccc_cmd()
232 	ret = hci->io->queue_xfer(hci, xfer, nxfers);  in i3c_hci_send_ccc_cmd()
236 	    hci->io->dequeue_xfer(hci, xfer, nxfers)) {  in i3c_hci_send_ccc_cmd()
268 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_daa()  local
272 	return hci->cmd->perform_daa(hci);  in i3c_hci_daa()
275 static int i3c_hci_alloc_safe_xfer_buf(struct i3c_hci *hci,  in i3c_hci_alloc_safe_xfer_buf()  argument
278 	if (hci->io != &mipi_i3c_hci_dma ||  in i3c_hci_alloc_safe_xfer_buf()
291 static void i3c_hci_free_safe_xfer_buf(struct i3c_hci *hci,  in i3c_hci_free_safe_xfer_buf()  argument
294 	if (hci->io != &mipi_i3c_hci_dma || xfer->bounce_buf == NULL)  in i3c_hci_free_safe_xfer_buf()
308 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_priv_xfers()  local
320 	size_limit = 1U << (16 + FIELD_GET(HC_CAP_MAX_DATA_LENGTH, hci->caps));  in i3c_hci_priv_xfers()
334 		hci->cmd->prep_i3c_xfer(hci, dev, &xfer[i]);  in i3c_hci_priv_xfers()
336 		ret = i3c_hci_alloc_safe_xfer_buf(hci, &xfer[i]);  in i3c_hci_priv_xfers()
344 	ret = hci->io->queue_xfer(hci, xfer, nxfers);  in i3c_hci_priv_xfers()
348 	    hci->io->dequeue_xfer(hci, xfer, nxfers)) {  in i3c_hci_priv_xfers()
363 		i3c_hci_free_safe_xfer_buf(hci, &xfer[i]);  in i3c_hci_priv_xfers()
373 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_i2c_xfers()  local
388 		hci->cmd->prep_i2c_xfer(hci, dev, &xfer[i]);  in i3c_hci_i2c_xfers()
390 		ret = i3c_hci_alloc_safe_xfer_buf(hci, &xfer[i]);  in i3c_hci_i2c_xfers()
398 	ret = hci->io->queue_xfer(hci, xfer, nxfers);  in i3c_hci_i2c_xfers()
402 	    hci->io->dequeue_xfer(hci, xfer, nxfers)) {  in i3c_hci_i2c_xfers()
415 		i3c_hci_free_safe_xfer_buf(hci, &xfer[i]);  in i3c_hci_i2c_xfers()
424 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_attach_i3c_dev()  local
433 	if (hci->cmd == &mipi_i3c_hci_cmd_v1) {  in i3c_hci_attach_i3c_dev()
434 		ret = mipi_i3c_hci_dat_v1.alloc_entry(hci);  in i3c_hci_attach_i3c_dev()
439 		mipi_i3c_hci_dat_v1.set_dynamic_addr(hci, ret,  in i3c_hci_attach_i3c_dev()
450 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_reattach_i3c_dev()  local
455 	if (hci->cmd == &mipi_i3c_hci_cmd_v1)  in i3c_hci_reattach_i3c_dev()
456 		mipi_i3c_hci_dat_v1.set_dynamic_addr(hci, dev_data->dat_idx,  in i3c_hci_reattach_i3c_dev()
464 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_detach_i3c_dev()  local
470 	if (hci->cmd == &mipi_i3c_hci_cmd_v1)  in i3c_hci_detach_i3c_dev()
471 		mipi_i3c_hci_dat_v1.free_entry(hci, dev_data->dat_idx);  in i3c_hci_detach_i3c_dev()
478 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_attach_i2c_dev()  local
484 	if (hci->cmd != &mipi_i3c_hci_cmd_v1)  in i3c_hci_attach_i2c_dev()
489 	ret = mipi_i3c_hci_dat_v1.alloc_entry(hci);  in i3c_hci_attach_i2c_dev()
494 	mipi_i3c_hci_dat_v1.set_static_addr(hci, ret, dev->addr);  in i3c_hci_attach_i2c_dev()
495 	mipi_i3c_hci_dat_v1.set_flags(hci, ret, DAT_0_I2C_DEVICE, 0);  in i3c_hci_attach_i2c_dev()
504 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_detach_i2c_dev()  local
511 		if (hci->cmd == &mipi_i3c_hci_cmd_v1)  in i3c_hci_detach_i2c_dev()
512 			mipi_i3c_hci_dat_v1.free_entry(hci, dev_data->dat_idx);  in i3c_hci_detach_i2c_dev()
521 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_request_ibi()  local
526 		mipi_i3c_hci_dat_v1.set_flags(hci, dat_idx, DAT_0_IBI_PAYLOAD, 0);  in i3c_hci_request_ibi()
528 		mipi_i3c_hci_dat_v1.clear_flags(hci, dat_idx, DAT_0_IBI_PAYLOAD, 0);  in i3c_hci_request_ibi()
529 	return hci->io->request_ibi(hci, dev, req);  in i3c_hci_request_ibi()
535 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_free_ibi()  local
537 	hci->io->free_ibi(hci, dev);  in i3c_hci_free_ibi()
543 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_enable_ibi()  local
546 	mipi_i3c_hci_dat_v1.clear_flags(hci, dev_data->dat_idx, DAT_0_SIR_REJECT, 0);  in i3c_hci_enable_ibi()
553 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_disable_ibi()  local
556 	mipi_i3c_hci_dat_v1.set_flags(hci, dev_data->dat_idx, DAT_0_SIR_REJECT, 0);  in i3c_hci_disable_ibi()
564 	struct i3c_hci *hci = to_i3c_hci(m);  in i3c_hci_recycle_ibi_slot()  local
566 	hci->io->recycle_ibi_slot(hci, dev, slot);  in i3c_hci_recycle_ibi_slot()
590 	struct i3c_hci *hci = dev_id;  in i3c_hci_irq_handler()  local
606 		dev_err(&hci->master.dev, "Host Controller Internal Error\n");  in i3c_hci_irq_handler()
610 	hci->io->irq_handler(hci);  in i3c_hci_irq_handler()
613 		dev_err(&hci->master.dev, "unexpected INTR_STATUS %#x\n", val);  in i3c_hci_irq_handler()
620 static int i3c_hci_init(struct i3c_hci *hci)  in i3c_hci_init()  argument
626 	/* Validate HCI hardware version */  in i3c_hci_init()
628 	hci->version_major = (regval >> 8) & 0xf;  in i3c_hci_init()
629 	hci->version_minor = (regval >> 4) & 0xf;  in i3c_hci_init()
630 	hci->revision = regval & 0xf;  in i3c_hci_init()
631 	dev_notice(&hci->master.dev, "MIPI I3C HCI v%u.%u r%02u\n",  in i3c_hci_init()
632 		   hci->version_major, hci->version_minor, hci->revision);  in i3c_hci_init()
640 		dev_err(&hci->master.dev, "unsupported HCI version\n");  in i3c_hci_init()
644 	hci->caps = reg_read(HC_CAPABILITIES);  in i3c_hci_init()
645 	DBG("caps = %#x", hci->caps);  in i3c_hci_init()
647 	size_in_dwords = hci->version_major < 1 ||  in i3c_hci_init()
648 			 (hci->version_major == 1 && hci->version_minor < 1);  in i3c_hci_init()
652 	hci->DAT_regs = offset ? hci->base_regs + offset : NULL;  in i3c_hci_init()
653 	hci->DAT_entries = FIELD_GET(DAT_TABLE_SIZE, regval);  in i3c_hci_init()
654 	hci->DAT_entry_size = FIELD_GET(DAT_ENTRY_SIZE, regval) ? 0 : 8;  in i3c_hci_init()
656 		hci->DAT_entries = 4 * hci->DAT_entries / hci->DAT_entry_size;  in i3c_hci_init()
657 	dev_info(&hci->master.dev, "DAT: %u %u-bytes entries at offset %#x\n",  in i3c_hci_init()
658 		 hci->DAT_entries, hci->DAT_entry_size, offset);  in i3c_hci_init()
662 	hci->DCT_regs = offset ? hci->base_regs + offset : NULL;  in i3c_hci_init()
663 	hci->DCT_entries = FIELD_GET(DCT_TABLE_SIZE, regval);  in i3c_hci_init()
664 	hci->DCT_entry_size = FIELD_GET(DCT_ENTRY_SIZE, regval) ? 0 : 16;  in i3c_hci_init()
666 		hci->DCT_entries = 4 * hci->DCT_entries / hci->DCT_entry_size;  in i3c_hci_init()
667 	dev_info(&hci->master.dev, "DCT: %u %u-bytes entries at offset %#x\n",  in i3c_hci_init()
668 		 hci->DCT_entries, hci->DCT_entry_size, offset);  in i3c_hci_init()
672 	hci->RHS_regs = offset ? hci->base_regs + offset : NULL;  in i3c_hci_init()
673 	dev_info(&hci->master.dev, "Ring Headers at offset %#x\n", offset);  in i3c_hci_init()
677 	hci->PIO_regs = offset ? hci->base_regs + offset : NULL;  in i3c_hci_init()
678 	dev_info(&hci->master.dev, "PIO section at offset %#x\n", offset);  in i3c_hci_init()
682 	hci->EXTCAPS_regs = offset ? hci->base_regs + offset : NULL;  in i3c_hci_init()
683 	dev_info(&hci->master.dev, "Extended Caps at offset %#x\n", offset);  in i3c_hci_init()
685 	ret = i3c_hci_parse_ext_caps(hci);  in i3c_hci_init()
716 				dev_err(&hci->master.dev, "cannot set BE mode\n");  in i3c_hci_init()
726 				dev_err(&hci->master.dev, "cannot clear BE mode\n");  in i3c_hci_init()
733 	switch (FIELD_GET(HC_CAP_CMD_SIZE, hci->caps)) {  in i3c_hci_init()
735 		hci->cmd = &mipi_i3c_hci_cmd_v1;  in i3c_hci_init()
738 		hci->cmd = &mipi_i3c_hci_cmd_v2;  in i3c_hci_init()
741 		dev_err(&hci->master.dev, "wrong CMD_SIZE capability value\n");  in i3c_hci_init()
745 	mode_selector = hci->version_major > 1 ||  in i3c_hci_init()
746 				(hci->version_major == 1 && hci->version_minor > 0);  in i3c_hci_init()
749 	if (hci->quirks & HCI_QUIRK_PIO_MODE)  in i3c_hci_init()
750 		hci->RHS_regs = NULL;  in i3c_hci_init()
753 	if (hci->RHS_regs) {  in i3c_hci_init()
756 			dev_err(&hci->master.dev, "PIO mode is stuck\n");  in i3c_hci_init()
759 			hci->io = &mipi_i3c_hci_dma;  in i3c_hci_init()
760 			dev_info(&hci->master.dev, "Using DMA\n");  in i3c_hci_init()
765 	if (!hci->io && hci->PIO_regs) {  in i3c_hci_init()
768 			dev_err(&hci->master.dev, "DMA mode is stuck\n");  in i3c_hci_init()
771 			hci->io = &mipi_i3c_hci_pio;  in i3c_hci_init()
772 			dev_info(&hci->master.dev, "Using PIO\n");  in i3c_hci_init()
776 	if (!hci->io) {  in i3c_hci_init()
777 		dev_err(&hci->master.dev, "neither DMA nor PIO can be used\n");  in i3c_hci_init()
784 	if (hci->quirks & HCI_QUIRK_OD_PP_TIMING)  in i3c_hci_init()
785 		amd_set_od_pp_timing(hci);  in i3c_hci_init()
792 	struct i3c_hci *hci;  in i3c_hci_probe()  local
795 	hci = devm_kzalloc(&pdev->dev, sizeof(*hci), GFP_KERNEL);  in i3c_hci_probe()
796 	if (!hci)  in i3c_hci_probe()
798 	hci->base_regs = devm_platform_ioremap_resource(pdev, 0);  in i3c_hci_probe()
799 	if (IS_ERR(hci->base_regs))  in i3c_hci_probe()
800 		return PTR_ERR(hci->base_regs);  in i3c_hci_probe()
802 	platform_set_drvdata(pdev, hci);  in i3c_hci_probe()
804 	hci->master.dev.init_name = dev_name(&pdev->dev);  in i3c_hci_probe()
806 	hci->quirks = (unsigned long)device_get_match_data(&pdev->dev);  in i3c_hci_probe()
808 	ret = i3c_hci_init(hci);  in i3c_hci_probe()
814 			       0, NULL, hci);  in i3c_hci_probe()
818 	ret = i3c_master_register(&hci->master, &pdev->dev,  in i3c_hci_probe()
828 	struct i3c_hci *hci = platform_get_drvdata(pdev);  in i3c_hci_remove()  local
830 	i3c_master_unregister(&hci->master);  in i3c_hci_remove()
834 	{ .compatible = "mipi-i3c-hci", },
849 		.name = "mipi-i3c-hci",
855 MODULE_ALIAS("platform:mipi-i3c-hci");
858 MODULE_DESCRIPTION("MIPI I3C HCI driver");