1 // SPDX-License-Identifier: GPL-2.0-or-later
8  *  Copyright (C) 1998-2002		Andre Hedrick <andre@linux-ide.org>
15  *  as Documentation/driver-api/libata.rst
75 	{ 0xfb, 0x2b, 0xac }, /* PIO mode 0 */
76 	{ 0x46, 0x29, 0xa4 }, /* PIO mode 1 */
77 	{ 0x23, 0x26, 0x64 }, /* PIO mode 2 */
78 	{ 0x27, 0x0d, 0x35 }, /* PIO mode 3, IORDY on, Prefetch off */
79 	{ 0x23, 0x09, 0x25 }, /* PIO mode 4, IORDY on, Prefetch off */
85 	{ 0xdf, 0x5f }, /* MDMA mode 0 */
86 	{ 0x6b, 0x27 }, /* MDMA mode 1 */
87 	{ 0x69, 0x25 }, /* MDMA mode 2 */
93 	{ 0x4a, 0x0f, 0xd5 }, /* UDMA mode 0 */
94 	{ 0x3a, 0x0a, 0xd0 }, /* UDMA mode 1 */
95 	{ 0x2a, 0x07, 0xcd }, /* UDMA mode 2 */
96 	{ 0x1a, 0x05, 0xcd }, /* UDMA mode 3 */
97 	{ 0x1a, 0x03, 0xcd }, /* UDMA mode 4 */
98 	{ 0x1a, 0x02, 0xcb }, /* UDMA mode 5 */
99 	{ 0x1a, 0x01, 0xcb }, /* UDMA mode 6 */
170  *	port_mmio - Get the MMIO address of PDC2027x extended registers
176 	return ap->host->iomap[PDC_MMIO_BAR] + ap->port_no * 0x100 + offset;  in port_mmio()
180  *	dev_mmio - Get the MMIO address of PDC2027x extended registers
187 	u8 adj = (adev->devno) ? 0x08 : 0x00;  in dev_mmio()
192  *	pdc2027x_cable_detect - Probe host controller cable detect info
210 	ata_port_dbg(ap, "No cable or 80-conductor cable\n");  in pdc2027x_cable_detect()
214 	ata_port_info(ap, DRV_NAME ":40-conductor cable detected\n");  in pdc2027x_cable_detect()
219  * pdc2027x_port_enabled - Check PDC ATA control register to see whether the port is enabled.
228  *	pdc2027x_prereset - prereset for PATA host controller
241 	if (!pdc2027x_port_enabled(link->ap))  in pdc2027x_prereset()
242 		return -ENOENT;  in pdc2027x_prereset()
247  *	pdc2027x_mode_filter	-	mode selection filter
259 	if (adev->class != ATA_DEV_ATA || adev->devno == 0 || pair == NULL)  in pdc2027x_mode_filter()
263 	ata_id_c_string(pair->id, model_num, ATA_ID_PROD,  in pdc2027x_mode_filter()
266 	if (strstr(model_num, "Maxtor") == NULL && pair->dma_mode == XFER_UDMA_6)  in pdc2027x_mode_filter()
273  *	pdc2027x_set_piomode - Initialize host controller PATA PIO timings
277  *	Set PIO mode for device.
285 	unsigned int pio = adev->pio_mode - XFER_PIO_0;  in pdc2027x_set_piomode()  local
288 	ata_port_dbg(ap, "adev->pio_mode[%X]\n", adev->pio_mode);  in pdc2027x_set_piomode()
291 	if (pio > 4) {  in pdc2027x_set_piomode()
292 		ata_port_err(ap, "Unknown pio mode [%d] ignored\n", pio);  in pdc2027x_set_piomode()
297 	/* Set the PIO timing registers using value table for 133MHz */  in pdc2027x_set_piomode()
298 	ata_port_dbg(ap, "Set pio regs... \n");  in pdc2027x_set_piomode()
302 	ctcr0 |= pdc2027x_pio_timing_tbl[pio].value0 |  in pdc2027x_set_piomode()
303 		(pdc2027x_pio_timing_tbl[pio].value1 << 8);  in pdc2027x_set_piomode()
308 	ctcr1 |= (pdc2027x_pio_timing_tbl[pio].value2 << 24);  in pdc2027x_set_piomode()
311 	ata_port_dbg(ap, "Set to pio mode[%u] \n", pio);  in pdc2027x_set_piomode()
315  *	pdc2027x_set_dmamode - Initialize host controller PATA UDMA timings
319  *	Set UDMA mode for device.
326 	unsigned int dma_mode = adev->dma_mode;  in pdc2027x_set_dmamode()
353 		ata_port_dbg(ap, "Set to udma mode[%u] \n", udma_mode);  in pdc2027x_set_dmamode()
369 		ata_port_dbg(ap, "Set to mdma mode[%u] \n", mdma_mode);  in pdc2027x_set_dmamode()
371 		ata_port_err(ap, "Unknown dma mode [%u] ignored\n", dma_mode);  in pdc2027x_set_dmamode()
376  *	pdc2027x_set_mode - Set the timing registers back to correct values.
386 	struct ata_port *ap = link->ap;  in pdc2027x_set_mode()
398 		 * Enable prefetch if the device support PIO only.  in pdc2027x_set_mode()
400 		if (dev->xfer_shift == ATA_SHIFT_PIO) {  in pdc2027x_set_mode()
414  *	pdc2027x_check_atapi_dma - Check whether ATAPI DMA can be supported for this command
425 	struct scsi_cmnd *cmd = qc->scsicmd;  in pdc2027x_check_atapi_dma()
426 	u8 *scsicmd = cmd->cmnd;  in pdc2027x_check_atapi_dma()
455  * pdc_read_counter - Read the ctr counter
461 	void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];  in pdc_read_counter()
476 	dev_dbg(host->dev, "bccrh [%X] bccrl [%X]\n", bccrh,  bccrl);  in pdc_read_counter()
477 	dev_dbg(host->dev, "bccrhv[%X] bccrlv[%X]\n", bccrhv, bccrlv);  in pdc_read_counter()
480 	 * The 30-bit decreasing counter are read by 2 pieces.  in pdc_read_counter()
485 		retry--;  in pdc_read_counter()
486 		dev_dbg(host->dev, "rereading counter\n");  in pdc_read_counter()
494  * pdc_adjust_pll - Adjust the PLL input clock in Hz.
502 	void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];  in pdc_adjust_pll()
511 		dev_err(host->dev, "Invalid PLL input clock %ldkHz, give up!\n",  in pdc_adjust_pll()
516 	dev_dbg(host->dev, "pout_required is %ld\n", pout_required);  in pdc_adjust_pll()
523 	dev_dbg(host->dev, "pll_ctl[%X]\n", pll_ctl);  in pdc_adjust_pll()
542 		dev_err(host->dev, "Invalid ratio %ld, give up!\n", ratio);  in pdc_adjust_pll()
546 	F = (ratio * (R+2)) / 1000 - 2;  in pdc_adjust_pll()
550 		dev_err(host->dev, "F[%d] invalid!\n", F);  in pdc_adjust_pll()
554 	dev_dbg(host->dev, "F[%d] R[%d] ratio*1000[%ld]\n", F, R, ratio);  in pdc_adjust_pll()
558 	dev_dbg(host->dev, "Writing pll_ctl[%X]\n", pll_ctl);  in pdc_adjust_pll()
572 	dev_dbg(host->dev, "pll_ctl[%X]\n", pll_ctl);  in pdc_adjust_pll()
578  * pdc_detect_pll_input_clock - Detect the PLL input clock in Hz.
585 	void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];  in pdc_detect_pll_input_clock()
591 	/* Start the test mode */  in pdc_detect_pll_input_clock()
593 	dev_dbg(host->dev, "scr[%X]\n", scr);  in pdc_detect_pll_input_clock()
608 	/* Stop the test mode */  in pdc_detect_pll_input_clock()
610 	dev_dbg(host->dev, "scr[%X]\n", scr);  in pdc_detect_pll_input_clock()
617 	pll_clock = ((start_count - end_count) & 0x3fffffff) / 100 *  in pdc_detect_pll_input_clock()
620 	dev_dbg(host->dev, "start[%ld] end[%ld] PLL input clock[%ld]HZ\n",  in pdc_detect_pll_input_clock()
627  * pdc_hardware_init - Initialize the hardware.
637 	 * On some system, where PCI bus is running at non-standard clock rate.  in pdc_hardware_init()
643 	dev_info(host->dev, "PLL input clock %ld kHz\n", pll_clock/1000);  in pdc_hardware_init()
650  * pdc_ata_setup_port - setup the mmio address
656 	port->cmd_addr		=  in pdc_ata_setup_port()
657 	port->data_addr		= base;  in pdc_ata_setup_port()
658 	port->feature_addr	=  in pdc_ata_setup_port()
659 	port->error_addr	= base + 0x05;  in pdc_ata_setup_port()
660 	port->nsect_addr	= base + 0x0a;  in pdc_ata_setup_port()
661 	port->lbal_addr		= base + 0x0f;  in pdc_ata_setup_port()
662 	port->lbam_addr		= base + 0x10;  in pdc_ata_setup_port()
663 	port->lbah_addr		= base + 0x15;  in pdc_ata_setup_port()
664 	port->device_addr	= base + 0x1a;  in pdc_ata_setup_port()
665 	port->command_addr	=  in pdc_ata_setup_port()
666 	port->status_addr	= base + 0x1f;  in pdc_ata_setup_port()
667 	port->altstatus_addr	=  in pdc_ata_setup_port()
668 	port->ctl_addr		= base + 0x81a;  in pdc_ata_setup_port()
672  * pdc2027x_init_one - PCI probe function
686 	unsigned int board_idx = (unsigned int) ent->driver_data;  in pdc2027x_init_one()
693 	ata_print_version_once(&pdev->dev, DRV_VERSION);  in pdc2027x_init_one()
696 	host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2);  in pdc2027x_init_one()
698 		return -ENOMEM;  in pdc2027x_init_one()
708 	host->iomap = pcim_iomap_table(pdev);  in pdc2027x_init_one()
710 	rc = dma_set_mask_and_coherent(&pdev->dev, ATA_DMA_MASK);  in pdc2027x_init_one()
714 	mmio_base = host->iomap[PDC_MMIO_BAR];  in pdc2027x_init_one()
717 		struct ata_port *ap = host->ports[i];  in pdc2027x_init_one()
719 		pdc_ata_setup_port(&ap->ioaddr, mmio_base + cmd_offset[i]);  in pdc2027x_init_one()
720 		ap->ioaddr.bmdma_addr = mmio_base + bmdma_offset[i];  in pdc2027x_init_one()
722 		ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");  in pdc2027x_init_one()
732 	return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,  in pdc2027x_init_one()
747 	if (pdev->device == PCI_DEVICE_ID_PROMISE_20268 ||  in pdc2027x_reinit_one()
748 	    pdev->device == PCI_DEVICE_ID_PROMISE_20270)  in pdc2027x_reinit_one()