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
82 	{ 0xfb, 0x2b, 0xac }, /* PIO mode 0 */
83 	{ 0x46, 0x29, 0xa4 }, /* PIO mode 1 */
84 	{ 0x23, 0x26, 0x64 }, /* PIO mode 2 */
85 	{ 0x27, 0x0d, 0x35 }, /* PIO mode 3, IORDY on, Prefetch off */
86 	{ 0x23, 0x09, 0x25 }, /* PIO mode 4, IORDY on, Prefetch off */
92 	{ 0xdf, 0x5f }, /* MDMA mode 0 */
93 	{ 0x6b, 0x27 }, /* MDMA mode 1 */
94 	{ 0x69, 0x25 }, /* MDMA mode 2 */
100 	{ 0x4a, 0x0f, 0xd5 }, /* UDMA mode 0 */
101 	{ 0x3a, 0x0a, 0xd0 }, /* UDMA mode 1 */
102 	{ 0x2a, 0x07, 0xcd }, /* UDMA mode 2 */
103 	{ 0x1a, 0x05, 0xcd }, /* UDMA mode 3 */
104 	{ 0x1a, 0x03, 0xcd }, /* UDMA mode 4 */
105 	{ 0x1a, 0x02, 0xcb }, /* UDMA mode 5 */
106 	{ 0x1a, 0x01, 0xcb }, /* UDMA mode 6 */
177  *	port_mmio - Get the MMIO address of PDC2027x extended registers
183 	return ap->host->iomap[PDC_MMIO_BAR] + ap->port_no * 0x100 + offset;  in port_mmio()
187  *	dev_mmio - Get the MMIO address of PDC2027x extended registers
194 	u8 adj = (adev->devno) ? 0x08 : 0x00;  in dev_mmio()
199  *	pdc2027x_pata_cable_detect - Probe host controller cable detect info
217 	PDPRINTK("No cable or 80-conductor cable on port %d\n", ap->port_no);  in pdc2027x_cable_detect()
221 	printk(KERN_INFO DRV_NAME ": 40-conductor cable detected on port %d\n", ap->port_no);  in pdc2027x_cable_detect()
226  * pdc2027x_port_enabled - Check PDC ATA control register to see whether the port is enabled.
235  *	pdc2027x_prereset - prereset for PATA host controller
248 	if (!pdc2027x_port_enabled(link->ap))  in pdc2027x_prereset()
249 		return -ENOENT;  in pdc2027x_prereset()
254  *	pdc2720x_mode_filter	-	mode selection filter
266 	if (adev->class != ATA_DEV_ATA || adev->devno == 0 || pair == NULL)  in pdc2027x_mode_filter()
270 	ata_id_c_string(pair->id, model_num, ATA_ID_PROD,  in pdc2027x_mode_filter()
273 	if (strstr(model_num, "Maxtor") == NULL && pair->dma_mode == XFER_UDMA_6)  in pdc2027x_mode_filter()
280  *	pdc2027x_set_piomode - Initialize host controller PATA PIO timings
284  *	Set PIO mode for device.
292 	unsigned int pio = adev->pio_mode - XFER_PIO_0;  in pdc2027x_set_piomode()  local
295 	PDPRINTK("adev->pio_mode[%X]\n", adev->pio_mode);  in pdc2027x_set_piomode()
298 	if (pio > 4) {  in pdc2027x_set_piomode()
299 		printk(KERN_ERR DRV_NAME ": Unknown pio mode [%d] ignored\n", pio);  in pdc2027x_set_piomode()
304 	/* Set the PIO timing registers using value table for 133MHz */  in pdc2027x_set_piomode()
305 	PDPRINTK("Set pio regs... \n");  in pdc2027x_set_piomode()
309 	ctcr0 |= pdc2027x_pio_timing_tbl[pio].value0 |  in pdc2027x_set_piomode()
310 		(pdc2027x_pio_timing_tbl[pio].value1 << 8);  in pdc2027x_set_piomode()
315 	ctcr1 |= (pdc2027x_pio_timing_tbl[pio].value2 << 24);  in pdc2027x_set_piomode()
318 	PDPRINTK("Set pio regs done\n");  in pdc2027x_set_piomode()
320 	PDPRINTK("Set to pio mode[%u] \n", pio);  in pdc2027x_set_piomode()
324  *	pdc2027x_set_dmamode - Initialize host controller PATA UDMA timings
328  *	Set UDMA mode for device.
335 	unsigned int dma_mode = adev->dma_mode;  in pdc2027x_set_dmamode()
364 		PDPRINTK("Set to udma mode[%u] \n", udma_mode);  in pdc2027x_set_dmamode()
381 		PDPRINTK("Set to mdma mode[%u] \n", mdma_mode);  in pdc2027x_set_dmamode()
383 		printk(KERN_ERR DRV_NAME ": Unknown dma mode [%u] ignored\n", dma_mode);  in pdc2027x_set_dmamode()
388  *	pdc2027x_set_mode - Set the timing registers back to correct values.
398 	struct ata_port *ap = link->ap;  in pdc2027x_set_mode()
410 		 * Enable prefetch if the device support PIO only.  in pdc2027x_set_mode()
412 		if (dev->xfer_shift == ATA_SHIFT_PIO) {  in pdc2027x_set_mode()
426  *	pdc2027x_check_atapi_dma - Check whether ATAPI DMA can be supported for this command
437 	struct scsi_cmnd *cmd = qc->scsicmd;  in pdc2027x_check_atapi_dma()
438 	u8 *scsicmd = cmd->cmnd;  in pdc2027x_check_atapi_dma()
467  * pdc_read_counter - Read the ctr counter
473 	void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];  in pdc_read_counter()
492 	 * The 30-bit decreasing counter are read by 2 pieces.  in pdc_read_counter()
497 		retry--;  in pdc_read_counter()
506  * adjust_pll - Adjust the PLL input clock in Hz.
514 	void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];  in pdc_adjust_pll()
559 	F = (ratio * (R+2)) / 1000 - 2;  in pdc_adjust_pll()
593  * detect_pll_input_clock - Detect the PLL input clock in Hz.
600 	void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR];  in pdc_detect_pll_input_clock()
606 	/* Start the test mode */  in pdc_detect_pll_input_clock()
623 	/* Stop the test mode */  in pdc_detect_pll_input_clock()
632 	pll_clock = ((start_count - end_count) & 0x3fffffff) / 100 *  in pdc_detect_pll_input_clock()
642  * pdc_hardware_init - Initialize the hardware.
652 	 * On some system, where PCI bus is running at non-standard clock rate.  in pdc_hardware_init()
658 	dev_info(host->dev, "PLL input clock %ld kHz\n", pll_clock/1000);  in pdc_hardware_init()
665  * pdc_ata_setup_port - setup the mmio address
671 	port->cmd_addr		=  in pdc_ata_setup_port()
672 	port->data_addr		= base;  in pdc_ata_setup_port()
673 	port->feature_addr	=  in pdc_ata_setup_port()
674 	port->error_addr	= base + 0x05;  in pdc_ata_setup_port()
675 	port->nsect_addr	= base + 0x0a;  in pdc_ata_setup_port()
676 	port->lbal_addr		= base + 0x0f;  in pdc_ata_setup_port()
677 	port->lbam_addr		= base + 0x10;  in pdc_ata_setup_port()
678 	port->lbah_addr		= base + 0x15;  in pdc_ata_setup_port()
679 	port->device_addr	= base + 0x1a;  in pdc_ata_setup_port()
680 	port->command_addr	=  in pdc_ata_setup_port()
681 	port->status_addr	= base + 0x1f;  in pdc_ata_setup_port()
682 	port->altstatus_addr	=  in pdc_ata_setup_port()
683 	port->ctl_addr		= base + 0x81a;  in pdc_ata_setup_port()
687  * pdc2027x_init_one - PCI probe function
701 	unsigned int board_idx = (unsigned int) ent->driver_data;  in pdc2027x_init_one()
708 	ata_print_version_once(&pdev->dev, DRV_VERSION);  in pdc2027x_init_one()
711 	host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2);  in pdc2027x_init_one()
713 		return -ENOMEM;  in pdc2027x_init_one()
723 	host->iomap = pcim_iomap_table(pdev);  in pdc2027x_init_one()
725 	rc = dma_set_mask_and_coherent(&pdev->dev, ATA_DMA_MASK);  in pdc2027x_init_one()
729 	mmio_base = host->iomap[PDC_MMIO_BAR];  in pdc2027x_init_one()
732 		struct ata_port *ap = host->ports[i];  in pdc2027x_init_one()
734 		pdc_ata_setup_port(&ap->ioaddr, mmio_base + cmd_offset[i]);  in pdc2027x_init_one()
735 		ap->ioaddr.bmdma_addr = mmio_base + bmdma_offset[i];  in pdc2027x_init_one()
737 		ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");  in pdc2027x_init_one()
747 	return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,  in pdc2027x_init_one()
762 	if (pdev->device == PCI_DEVICE_ID_PROMISE_20268 ||  in pdc2027x_reinit_one()
763 	    pdev->device == PCI_DEVICE_ID_PROMISE_20270)  in pdc2027x_reinit_one()