// 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);