12  *  Copyright (C) 1998-2002		Andre Hedrick <andre@linux-ide.org>
20  *  as Documentation/driver-api/libata.rst
183  *	port_mmio - Get the MMIO address of PDC2027x extended registers
184  *	@ap: Port
189 	return ap->host->iomap[PDC_MMIO_BAR] + ap->port_no * 0x100 + offset;  in port_mmio()
193  *	dev_mmio - Get the MMIO address of PDC2027x extended registers
194  *	@ap: Port
200 	u8 adj = (adev->devno) ? 0x08 : 0x00;  in dev_mmio()
205  *	pdc2027x_pata_cable_detect - Probe host controller cable detect info
206  *	@ap: Port for which cable detect info is desired
223 	PDPRINTK("No cable or 80-conductor cable on port %d\n", ap->port_no);  in pdc2027x_cable_detect()
227 	printk(KERN_INFO DRV_NAME ": 40-conductor cable detected on port %d\n", ap->port_no);  in pdc2027x_cable_detect()
232  * pdc2027x_port_enabled - Check PDC ATA control register to see whether the port is enabled.
233  * @ap: Port to check
241  *	pdc2027x_prereset - prereset for PATA host controller
253 	/* Check whether port enabled */  in pdc2027x_prereset()
254 	if (!pdc2027x_port_enabled(link->ap))  in pdc2027x_prereset()
255 		return -ENOENT;  in pdc2027x_prereset()
260  *	pdc2720x_mode_filter	-	mode selection filter
272 	if (adev->class != ATA_DEV_ATA || adev->devno == 0 || pair == NULL)  in pdc2027x_mode_filter()
276 	ata_id_c_string(pair->id, model_num, ATA_ID_PROD,  in pdc2027x_mode_filter()
279 	if (strstr(model_num, "Maxtor") == NULL && pair->dma_mode == XFER_UDMA_6)  in pdc2027x_mode_filter()
286  *	pdc2027x_set_piomode - Initialize host controller PATA PIO timings
287  *	@ap: Port to configure
298 	unsigned int pio = adev->pio_mode - XFER_PIO_0;  in pdc2027x_set_piomode()
301 	PDPRINTK("adev->pio_mode[%X]\n", adev->pio_mode);  in pdc2027x_set_piomode()
330  *	pdc2027x_set_dmamode - Initialize host controller PATA UDMA timings
331  *	@ap: Port to configure
341 	unsigned int dma_mode = adev->dma_mode;  in pdc2027x_set_dmamode()
394  *	pdc2027x_set_mode - Set the timing registers back to correct values.
404 	struct ata_port *ap = link->ap;  in pdc2027x_set_mode()
418 		if (dev->xfer_shift == ATA_SHIFT_PIO) {  in pdc2027x_set_mode()
432  *	pdc2027x_check_atapi_dma - Check whether ATAPI DMA can be supported for this command
443 	struct scsi_cmnd *cmd = qc->scsicmd;  in pdc2027x_check_atapi_dma()
444 	u8 *scsicmd = cmd->cmnd;  in pdc2027x_check_atapi_dma()
473  * pdc_read_counter - Read the ctr counter
474  * @host: target ATA host
477 static long pdc_read_counter(struct ata_host *host)  in pdc_read_counter()  argument
479 	void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];  in pdc_read_counter()
498 	 * The 30-bit decreasing counter are read by 2 pieces.  in pdc_read_counter()
503 		retry--;  in pdc_read_counter()
512  * adjust_pll - Adjust the PLL input clock in Hz.
515  * @host: target ATA host
518 static void pdc_adjust_pll(struct ata_host *host, long pll_clock, unsigned int board_idx)  in pdc_adjust_pll()  argument
520 	void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];  in pdc_adjust_pll()
565 	F = (ratio * (R+2)) / 1000 - 2;  in pdc_adjust_pll()
599  * detect_pll_input_clock - Detect the PLL input clock in Hz.
600  * @host: target ATA host
604 static long pdc_detect_pll_input_clock(struct ata_host *host)  in pdc_detect_pll_input_clock()  argument
606 	void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];  in pdc_detect_pll_input_clock()
619 	start_count = pdc_read_counter(host);  in pdc_detect_pll_input_clock()
626 	end_count = pdc_read_counter(host);  in pdc_detect_pll_input_clock()
638 	pll_clock = ((start_count - end_count) & 0x3fffffff) / 100 *  in pdc_detect_pll_input_clock()
648  * pdc_hardware_init - Initialize the hardware.
649  * @host: target ATA host
652 static void pdc_hardware_init(struct ata_host *host, unsigned int board_idx)  in pdc_hardware_init()  argument
658 	 * On some system, where PCI bus is running at non-standard clock rate.  in pdc_hardware_init()
662 	pll_clock = pdc_detect_pll_input_clock(host);  in pdc_hardware_init()
664 	dev_info(host->dev, "PLL input clock %ld kHz\n", pll_clock/1000);  in pdc_hardware_init()
667 	pdc_adjust_pll(host, pll_clock, board_idx);  in pdc_hardware_init()
671  * pdc_ata_setup_port - setup the mmio address
672  * @port: ata ioports to setup
675 static void pdc_ata_setup_port(struct ata_ioports *port, void __iomem *base)  in pdc_ata_setup_port()  argument
677 	port->cmd_addr		=  in pdc_ata_setup_port()
678 	port->data_addr		= base;  in pdc_ata_setup_port()
679 	port->feature_addr	=  in pdc_ata_setup_port()
680 	port->error_addr	= base + 0x05;  in pdc_ata_setup_port()
681 	port->nsect_addr	= base + 0x0a;  in pdc_ata_setup_port()
682 	port->lbal_addr		= base + 0x0f;  in pdc_ata_setup_port()
683 	port->lbam_addr		= base + 0x10;  in pdc_ata_setup_port()
684 	port->lbah_addr		= base + 0x15;  in pdc_ata_setup_port()
685 	port->device_addr	= base + 0x1a;  in pdc_ata_setup_port()
686 	port->command_addr	=  in pdc_ata_setup_port()
687 	port->status_addr	= base + 0x1f;  in pdc_ata_setup_port()
688 	port->altstatus_addr	=  in pdc_ata_setup_port()
689 	port->ctl_addr		= base + 0x81a;  in pdc_ata_setup_port()
693  * pdc2027x_init_one - PCI probe function
707 	unsigned int board_idx = (unsigned int) ent->driver_data;  in pdc2027x_init_one()
710 	struct ata_host *host;  in pdc2027x_init_one()  local
714 	ata_print_version_once(&pdev->dev, DRV_VERSION);  in pdc2027x_init_one()
716 	/* alloc host */  in pdc2027x_init_one()
717 	host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2);  in pdc2027x_init_one()
718 	if (!host)  in pdc2027x_init_one()
719 		return -ENOMEM;  in pdc2027x_init_one()
721 	/* acquire resources and fill host */  in pdc2027x_init_one()
729 	host->iomap = pcim_iomap_table(pdev);  in pdc2027x_init_one()
731 	rc = dma_set_mask(&pdev->dev, ATA_DMA_MASK);  in pdc2027x_init_one()
735 	rc = dma_set_coherent_mask(&pdev->dev, ATA_DMA_MASK);  in pdc2027x_init_one()
739 	mmio_base = host->iomap[PDC_MMIO_BAR];  in pdc2027x_init_one()
742 		struct ata_port *ap = host->ports[i];  in pdc2027x_init_one()
744 		pdc_ata_setup_port(&ap->ioaddr, mmio_base + cmd_offset[i]);  in pdc2027x_init_one()
745 		ap->ioaddr.bmdma_addr = mmio_base + bmdma_offset[i];  in pdc2027x_init_one()
747 		ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");  in pdc2027x_init_one()
754 	pdc_hardware_init(host, board_idx);  in pdc2027x_init_one()
757 	return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,  in pdc2027x_init_one()
764 	struct ata_host *host = pci_get_drvdata(pdev);  in pdc2027x_reinit_one()  local
772 	if (pdev->device == PCI_DEVICE_ID_PROMISE_20268 ||  in pdc2027x_reinit_one()
773 	    pdev->device == PCI_DEVICE_ID_PROMISE_20270)  in pdc2027x_reinit_one()
778 	pdc_hardware_init(host, board_idx);  in pdc2027x_reinit_one()
780 	ata_host_resume(host);  in pdc2027x_reinit_one()