1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *  pdc_adma.c - Pacific Digital Corporation ADMA
10  *  as Documentation/driver-api/libata.rst
12  *  Supports ATA disks in single-packet ADMA mode.
41 	ADMA_REGS((ap)->host->iomap[ADMA_MMIO_BAR], ap->port_no)
53 	/* global register offsets */
56 	/* per-channel register offsets */
104 	board_1841_idx		= 0,	/* ADMA 2-port controller */
160 	{ PCI_VDEVICE(PDC, 0x1841), board_1841_idx },
190 	struct adma_port_priv *pp = ap->private_data;  in adma_reinit_engine()
194 	writeb(ATA_NIEN, ap->ioaddr.ctl_addr);  in adma_reinit_engine()
200 	/* set in-FIFO threshold to 0x100 */  in adma_reinit_engine()
204 	writel((u32)pp->pkt_dma, chan + ADMA_CPB_NEXT);  in adma_reinit_engine()
206 	/* set out-FIFO threshold to 0x100 */  in adma_reinit_engine()
229 	writeb(ATA_NIEN, ap->ioaddr.ctl_addr);  in adma_freeze()
246 	struct ata_port *ap = link->ap;  in adma_prereset()
247 	struct adma_port_priv *pp = ap->private_data;  in adma_prereset()
249 	if (pp->state != adma_state_idle) /* healthy paranoia */  in adma_prereset()
250 		pp->state = adma_state_mmio;  in adma_prereset()
259 	struct ata_port *ap = qc->ap;  in adma_fill_sg()
260 	struct adma_port_priv *pp = ap->private_data;  in adma_fill_sg()
261 	u8  *buf = pp->pkt, *last_buf = NULL;  in adma_fill_sg()
263 	u8 pFLAGS = pORD | ((qc->tf.flags & ATA_TFLAG_WRITE) ? pDIRO : 0);  in adma_fill_sg()
266 	for_each_sg(qc->sg, sg, qc->n_elem, si) {  in adma_fill_sg()
280 		buf[i++] = qc->dev->dma_mode & 0xf;  in adma_fill_sg()
285 			(pFLAGS & pEND) ? 0 : cpu_to_le32(pp->pkt_dma + i + 4);  in adma_fill_sg()
300 	struct adma_port_priv *pp = qc->ap->private_data;  in adma_qc_prep()
301 	u8  *buf = pp->pkt;  in adma_qc_prep()
302 	u32 pkt_dma = (u32)pp->pkt_dma;  in adma_qc_prep()
307 	adma_enter_reg_mode(qc->ap);  in adma_qc_prep()
308 	if (qc->tf.protocol != ATA_PROT_DMA)  in adma_qc_prep()
326 	buf[i++] = qc->tf.device;  in adma_qc_prep()
328 	if ((qc->tf.flags & ATA_TFLAG_LBA48)) {  in adma_qc_prep()
329 		buf[i++] = qc->tf.hob_nsect;  in adma_qc_prep()
331 		buf[i++] = qc->tf.hob_lbal;  in adma_qc_prep()
333 		buf[i++] = qc->tf.hob_lbam;  in adma_qc_prep()
335 		buf[i++] = qc->tf.hob_lbah;  in adma_qc_prep()
338 	buf[i++] = qc->tf.nsect;  in adma_qc_prep()
340 	buf[i++] = qc->tf.lbal;  in adma_qc_prep()
342 	buf[i++] = qc->tf.lbam;  in adma_qc_prep()
344 	buf[i++] = qc->tf.lbah;  in adma_qc_prep()
350 	buf[i++] = qc->tf.command;  in adma_qc_prep()
353 	buf[3] = (i >> 3) - 2;				/* cLEN */  in adma_qc_prep()
379 	struct ata_port *ap = qc->ap;  in adma_packet_start()
390 	struct adma_port_priv *pp = qc->ap->private_data;  in adma_qc_issue()
392 	switch (qc->tf.protocol) {  in adma_qc_issue()
394 		pp->state = adma_state_pkt;  in adma_qc_issue()
406 	pp->state = adma_state_mmio;  in adma_qc_issue()
414 	for (port_no = 0; port_no < host->n_ports; ++port_no) {  in adma_intr_pkt()
415 		struct ata_port *ap = host->ports[port_no];  in adma_intr_pkt()
425 		pp = ap->private_data;  in adma_intr_pkt()
426 		if (!pp || pp->state != adma_state_pkt)  in adma_intr_pkt()
428 		qc = ata_qc_from_tag(ap, ap->link.active_tag);  in adma_intr_pkt()
429 		if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) {  in adma_intr_pkt()
431 				qc->err_mask |= AC_ERR_HOST_BUS;  in adma_intr_pkt()
433 				qc->err_mask |= AC_ERR_OTHER;  in adma_intr_pkt()
435 			if (pp->pkt[0] & cATERR)  in adma_intr_pkt()
436 				qc->err_mask |= AC_ERR_DEV;  in adma_intr_pkt()
437 			else if (pp->pkt[0] != cDONE)  in adma_intr_pkt()
438 				qc->err_mask |= AC_ERR_OTHER;  in adma_intr_pkt()
440 			if (!qc->err_mask)  in adma_intr_pkt()
443 				struct ata_eh_info *ehi = &ap->link.eh_info;  in adma_intr_pkt()
446 					"ADMA-status 0x%02X", status);  in adma_intr_pkt()
448 					"pkt[0] 0x%02X", pp->pkt[0]);  in adma_intr_pkt()
450 				if (qc->err_mask == AC_ERR_DEV)  in adma_intr_pkt()
464 	for (port_no = 0; port_no < host->n_ports; ++port_no) {  in adma_intr_mmio()
465 		struct ata_port *ap = host->ports[port_no];  in adma_intr_mmio()
466 		struct adma_port_priv *pp = ap->private_data;  in adma_intr_mmio()
469 		if (!pp || pp->state != adma_state_mmio)  in adma_intr_mmio()
471 		qc = ata_qc_from_tag(ap, ap->link.active_tag);  in adma_intr_mmio()
472 		if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) {  in adma_intr_mmio()
479 				ap->print_id, qc->tf.protocol, status);  in adma_intr_mmio()
482 			pp->state = adma_state_idle;  in adma_intr_mmio()
483 			qc->err_mask |= ac_err_mask(status);  in adma_intr_mmio()
484 			if (!qc->err_mask)  in adma_intr_mmio()
487 				struct ata_eh_info *ehi = &ap->link.eh_info;  in adma_intr_mmio()
491 				if (qc->err_mask == AC_ERR_DEV)  in adma_intr_mmio()
509 	spin_lock(&host->lock);  in adma_intr()
511 	spin_unlock(&host->lock);  in adma_intr()
520 	port->cmd_addr		=  in adma_ata_setup_port()
521 	port->data_addr		= base + 0x000;  in adma_ata_setup_port()
522 	port->error_addr	=  in adma_ata_setup_port()
523 	port->feature_addr	= base + 0x004;  in adma_ata_setup_port()
524 	port->nsect_addr	= base + 0x008;  in adma_ata_setup_port()
525 	port->lbal_addr		= base + 0x00c;  in adma_ata_setup_port()
526 	port->lbam_addr		= base + 0x010;  in adma_ata_setup_port()
527 	port->lbah_addr		= base + 0x014;  in adma_ata_setup_port()
528 	port->device_addr	= base + 0x018;  in adma_ata_setup_port()
529 	port->status_addr	=  in adma_ata_setup_port()
530 	port->command_addr	= base + 0x01c;  in adma_ata_setup_port()
531 	port->altstatus_addr	=  in adma_ata_setup_port()
532 	port->ctl_addr		= base + 0x038;  in adma_ata_setup_port()
537 	struct device *dev = ap->host->dev;  in adma_port_start()
543 		return -ENOMEM;  in adma_port_start()
544 	pp->pkt = dmam_alloc_coherent(dev, ADMA_PKT_BYTES, &pp->pkt_dma,  in adma_port_start()
546 	if (!pp->pkt)  in adma_port_start()
547 		return -ENOMEM;  in adma_port_start()
549 	if ((pp->pkt_dma & 7) != 0) {  in adma_port_start()
550 		printk(KERN_ERR "bad alignment for pp->pkt_dma: %08x\n",  in adma_port_start()
551 						(u32)pp->pkt_dma);  in adma_port_start()
552 		return -ENOMEM;  in adma_port_start()
554 	ap->private_data = pp;  in adma_port_start()
569 	writeb(7, host->iomap[ADMA_MMIO_BAR] + ADMA_MODE_LOCK);  in adma_host_init()
573 		adma_reset_engine(host->ports[port_no]);  in adma_host_init()
579 	unsigned int board_idx = (unsigned int) ent->driver_data;  in adma_ata_init_one()
585 	ata_print_version_once(&pdev->dev, DRV_VERSION);  in adma_ata_init_one()
588 	host = ata_host_alloc_pinfo(&pdev->dev, ppi, ADMA_PORTS);  in adma_ata_init_one()
590 		return -ENOMEM;  in adma_ata_init_one()
598 		return -ENODEV;  in adma_ata_init_one()
603 	host->iomap = pcim_iomap_table(pdev);  in adma_ata_init_one()
604 	mmio_base = host->iomap[ADMA_MMIO_BAR];  in adma_ata_init_one()
606 	rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));  in adma_ata_init_one()
608 		dev_err(&pdev->dev, "32-bit DMA enable failed\n");  in adma_ata_init_one()
613 		struct ata_port *ap = host->ports[port_no];  in adma_ata_init_one()
615 		unsigned int offset = port_base - mmio_base;  in adma_ata_init_one()
617 		adma_ata_setup_port(&ap->ioaddr, port_base);  in adma_ata_init_one()
619 		ata_port_pbar_desc(ap, ADMA_MMIO_BAR, -1, "mmio");  in adma_ata_init_one()
627 	return ata_host_activate(host, pdev->irq, adma_intr, IRQF_SHARED,  in adma_ata_init_one()
634 MODULE_DESCRIPTION("Pacific Digital Corporation ADMA low-level driver");