1 files changed, 298 insertions, 0 deletions
diff --git a/drivers/ata/sata_sis.c b/drivers/ata/sata_sis.c
new file mode 100644
index 000000000..316237362
--- /dev/null
+++ b/drivers/ata/sata_sis.c
@@ -0,0 +1,298 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  sata_sis.c - Silicon Integrated Systems SATA
+ *
+ *  Maintained by:  Uwe Koziolek
+ *  		    Please ALWAYS copy linux-ide@vger.kernel.org
+ *		    on emails.
+ *
+ *  Copyright 2004 Uwe Koziolek
+ *
+ *  libata documentation is available via 'make {ps|pdf}docs',
+ *  as Documentation/driver-api/libata.rst
+ *
+ *  Hardware documentation available under NDA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+#include "sis.h"
+
+#define DRV_NAME	"sata_sis"
+#define DRV_VERSION	"1.0"
+
+enum {
+	sis_180			= 0,
+	SIS_SCR_PCI_BAR		= 5,
+
+	/* PCI configuration registers */
+	SIS_GENCTL		= 0x54, /* IDE General Control register */
+	SIS_SCR_BASE		= 0xc0, /* sata0 phy SCR registers */
+	SIS180_SATA1_OFS	= 0x10, /* offset from sata0->sata1 phy regs */
+	SIS182_SATA1_OFS	= 0x20, /* offset from sata0->sata1 phy regs */
+	SIS_PMR			= 0x90, /* port mapping register */
+	SIS_PMR_COMBINED	= 0x30,
+
+	/* random bits */
+	SIS_FLAG_CFGSCR		= (1 << 30), /* host flag: SCRs via PCI cfg */
+
+	GENCTL_IOMAPPED_SCR	= (1 << 26), /* if set, SCRs are in IO space */
+};
+
+static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
+static int sis_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
+static int sis_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
+
+static const struct pci_device_id sis_pci_tbl[] = {
+	{ PCI_VDEVICE(SI, 0x0180), sis_180 },	/* SiS 964/180 */
+	{ PCI_VDEVICE(SI, 0x0181), sis_180 },	/* SiS 964/180 */
+	{ PCI_VDEVICE(SI, 0x0182), sis_180 },	/* SiS 965/965L */
+	{ PCI_VDEVICE(SI, 0x0183), sis_180 },	/* SiS 965/965L */
+	{ PCI_VDEVICE(SI, 0x1182), sis_180 },	/* SiS 966/680 */
+	{ PCI_VDEVICE(SI, 0x1183), sis_180 },	/* SiS 966/966L/968/680 */
+
+	{ }	/* terminate list */
+};
+
+static struct pci_driver sis_pci_driver = {
+	.name			= DRV_NAME,
+	.id_table		= sis_pci_tbl,
+	.probe			= sis_init_one,
+	.remove			= ata_pci_remove_one,
+#ifdef CONFIG_PM_SLEEP
+	.suspend		= ata_pci_device_suspend,
+	.resume			= ata_pci_device_resume,
+#endif
+};
+
+static struct scsi_host_template sis_sht = {
+	ATA_BMDMA_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations sis_ops = {
+	.inherits		= &ata_bmdma_port_ops,
+	.scr_read		= sis_scr_read,
+	.scr_write		= sis_scr_write,
+};
+
+static const struct ata_port_info sis_port_info = {
+	.flags		= ATA_FLAG_SATA,
+	.pio_mask	= ATA_PIO4,
+	.mwdma_mask	= ATA_MWDMA2,
+	.udma_mask	= ATA_UDMA6,
+	.port_ops	= &sis_ops,
+};
+
+MODULE_AUTHOR("Uwe Koziolek");
+MODULE_DESCRIPTION("low-level driver for Silicon Integrated Systems SATA controller");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, sis_pci_tbl);
+MODULE_VERSION(DRV_VERSION);
+
+static unsigned int get_scr_cfg_addr(struct ata_link *link, unsigned int sc_reg)
+{
+	struct ata_port *ap = link->ap;
+	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+	unsigned int addr = SIS_SCR_BASE + (4 * sc_reg);
+	u8 pmr;
+
+	if (ap->port_no)  {
+		switch (pdev->device) {
+		case 0x0180:
+		case 0x0181:
+			pci_read_config_byte(pdev, SIS_PMR, &pmr);
+			if ((pmr & SIS_PMR_COMBINED) == 0)
+				addr += SIS180_SATA1_OFS;
+			break;
+
+		case 0x0182:
+		case 0x0183:
+		case 0x1182:
+			addr += SIS182_SATA1_OFS;
+			break;
+		}
+	}
+	if (link->pmp)
+		addr += 0x10;
+
+	return addr;
+}
+
+static u32 sis_scr_cfg_read(struct ata_link *link,
+			    unsigned int sc_reg, u32 *val)
+{
+	struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
+	unsigned int cfg_addr = get_scr_cfg_addr(link, sc_reg);
+
+	if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
+		return -EINVAL;
+
+	pci_read_config_dword(pdev, cfg_addr, val);
+	return 0;
+}
+
+static int sis_scr_cfg_write(struct ata_link *link,
+			     unsigned int sc_reg, u32 val)
+{
+	struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
+	unsigned int cfg_addr = get_scr_cfg_addr(link, sc_reg);
+
+	pci_write_config_dword(pdev, cfg_addr, val);
+	return 0;
+}
+
+static int sis_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
+{
+	struct ata_port *ap = link->ap;
+	void __iomem *base = ap->ioaddr.scr_addr + link->pmp * 0x10;
+
+	if (sc_reg > SCR_CONTROL)
+		return -EINVAL;
+
+	if (ap->flags & SIS_FLAG_CFGSCR)
+		return sis_scr_cfg_read(link, sc_reg, val);
+
+	*val = ioread32(base + sc_reg * 4);
+	return 0;
+}
+
+static int sis_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
+{
+	struct ata_port *ap = link->ap;
+	void __iomem *base = ap->ioaddr.scr_addr + link->pmp * 0x10;
+
+	if (sc_reg > SCR_CONTROL)
+		return -EINVAL;
+
+	if (ap->flags & SIS_FLAG_CFGSCR)
+		return sis_scr_cfg_write(link, sc_reg, val);
+
+	iowrite32(val, base + (sc_reg * 4));
+	return 0;
+}
+
+static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	struct ata_port_info pi = sis_port_info;
+	const struct ata_port_info *ppi[] = { &pi, &pi };
+	struct ata_host *host;
+	u32 genctl, val;
+	u8 pmr;
+	u8 port2_start = 0x20;
+	int i, rc;
+
+	ata_print_version_once(&pdev->dev, DRV_VERSION);
+
+	rc = pcim_enable_device(pdev);
+	if (rc)
+		return rc;
+
+	/* check and see if the SCRs are in IO space or PCI cfg space */
+	pci_read_config_dword(pdev, SIS_GENCTL, &genctl);
+	if ((genctl & GENCTL_IOMAPPED_SCR) == 0)
+		pi.flags |= SIS_FLAG_CFGSCR;
+
+	/* if hardware thinks SCRs are in IO space, but there are
+	 * no IO resources assigned, change to PCI cfg space.
+	 */
+	if ((!(pi.flags & SIS_FLAG_CFGSCR)) &&
+	    ((pci_resource_start(pdev, SIS_SCR_PCI_BAR) == 0) ||
+	     (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) {
+		genctl &= ~GENCTL_IOMAPPED_SCR;
+		pci_write_config_dword(pdev, SIS_GENCTL, genctl);
+		pi.flags |= SIS_FLAG_CFGSCR;
+	}
+
+	pci_read_config_byte(pdev, SIS_PMR, &pmr);
+	switch (ent->device) {
+	case 0x0180:
+	case 0x0181:
+
+		/* The PATA-handling is provided by pata_sis */
+		switch (pmr & 0x30) {
+		case 0x10:
+			ppi[1] = &sis_info133_for_sata;
+			break;
+
+		case 0x30:
+			ppi[0] = &sis_info133_for_sata;
+			break;
+		}
+		if ((pmr & SIS_PMR_COMBINED) == 0) {
+			dev_info(&pdev->dev,
+				 "Detected SiS 180/181/964 chipset in SATA mode\n");
+			port2_start = 64;
+		} else {
+			dev_info(&pdev->dev,
+				 "Detected SiS 180/181 chipset in combined mode\n");
+			port2_start = 0;
+			pi.flags |= ATA_FLAG_SLAVE_POSS;
+		}
+		break;
+
+	case 0x0182:
+	case 0x0183:
+		pci_read_config_dword(pdev, 0x6C, &val);
+		if (val & (1L << 31)) {
+			dev_info(&pdev->dev, "Detected SiS 182/965 chipset\n");
+			pi.flags |= ATA_FLAG_SLAVE_POSS;
+		} else {
+			dev_info(&pdev->dev, "Detected SiS 182/965L chipset\n");
+		}
+		break;
+
+	case 0x1182:
+		dev_info(&pdev->dev,
+			 "Detected SiS 1182/966/680 SATA controller\n");
+		pi.flags |= ATA_FLAG_SLAVE_POSS;
+		break;
+
+	case 0x1183:
+		dev_info(&pdev->dev,
+			 "Detected SiS 1183/966/966L/968/680 controller in PATA mode\n");
+		ppi[0] = &sis_info133_for_sata;
+		ppi[1] = &sis_info133_for_sata;
+		break;
+	}
+
+	rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host);
+	if (rc)
+		return rc;
+
+	for (i = 0; i < 2; i++) {
+		struct ata_port *ap = host->ports[i];
+
+		if (ap->flags & ATA_FLAG_SATA &&
+		    ap->flags & ATA_FLAG_SLAVE_POSS) {
+			rc = ata_slave_link_init(ap);
+			if (rc)
+				return rc;
+		}
+	}
+
+	if (!(pi.flags & SIS_FLAG_CFGSCR)) {
+		void __iomem *mmio;
+
+		rc = pcim_iomap_regions(pdev, 1 << SIS_SCR_PCI_BAR, DRV_NAME);
+		if (rc)
+			return rc;
+		mmio = host->iomap[SIS_SCR_PCI_BAR];
+
+		host->ports[0]->ioaddr.scr_addr = mmio;
+		host->ports[1]->ioaddr.scr_addr = mmio + port2_start;
+	}
+
+	pci_set_master(pdev);
+	pci_intx(pdev, 1);
+	return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
+				 IRQF_SHARED, &sis_sht);
+}
+
+module_pci_driver(sis_pci_driver);