1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * sata_sis.c - Silicon Integrated Systems SATA
5 * Maintained by: Uwe Koziolek
6 * Please ALWAYS copy linux-ide@vger.kernel.org
9 * Copyright 2004 Uwe Koziolek
11 * libata documentation is available via 'make {ps|pdf}docs',
12 * as Documentation/driver-api/libata.rst
14 * Hardware documentation available under NDA.
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/pci.h>
20 #include <linux/blkdev.h>
21 #include <linux/delay.h>
22 #include <linux/interrupt.h>
23 #include <linux/device.h>
24 #include <scsi/scsi_host.h>
25 #include <linux/libata.h>
28 #define DRV_NAME "sata_sis"
29 #define DRV_VERSION "1.0"
35 /* PCI configuration registers */
36 SIS_GENCTL = 0x54, /* IDE General Control register */
37 SIS_SCR_BASE = 0xc0, /* sata0 phy SCR registers */
38 SIS180_SATA1_OFS = 0x10, /* offset from sata0->sata1 phy regs */
39 SIS182_SATA1_OFS = 0x20, /* offset from sata0->sata1 phy regs */
40 SIS_PMR = 0x90, /* port mapping register */
41 SIS_PMR_COMBINED = 0x30,
44 SIS_FLAG_CFGSCR = (1 << 30), /* host flag: SCRs via PCI cfg */
46 GENCTL_IOMAPPED_SCR = (1 << 26), /* if set, SCRs are in IO space */
49 static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
50 static int sis_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
51 static int sis_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
53 static const struct pci_device_id sis_pci_tbl[] = {
54 { PCI_VDEVICE(SI, 0x0180), sis_180 }, /* SiS 964/180 */
55 { PCI_VDEVICE(SI, 0x0181), sis_180 }, /* SiS 964/180 */
56 { PCI_VDEVICE(SI, 0x0182), sis_180 }, /* SiS 965/965L */
57 { PCI_VDEVICE(SI, 0x0183), sis_180 }, /* SiS 965/965L */
58 { PCI_VDEVICE(SI, 0x1182), sis_180 }, /* SiS 966/680 */
59 { PCI_VDEVICE(SI, 0x1183), sis_180 }, /* SiS 966/966L/968/680 */
61 { } /* terminate list */
64 static struct pci_driver sis_pci_driver = {
66 .id_table = sis_pci_tbl,
67 .probe = sis_init_one,
68 .remove = ata_pci_remove_one,
69 #ifdef CONFIG_PM_SLEEP
70 .suspend = ata_pci_device_suspend,
71 .resume = ata_pci_device_resume,
75 static const struct scsi_host_template sis_sht = {
76 ATA_BMDMA_SHT(DRV_NAME),
79 static struct ata_port_operations sis_ops = {
80 .inherits = &ata_bmdma_port_ops,
81 .scr_read = sis_scr_read,
82 .scr_write = sis_scr_write,
85 static const struct ata_port_info sis_port_info = {
86 .flags = ATA_FLAG_SATA,
88 .mwdma_mask = ATA_MWDMA2,
89 .udma_mask = ATA_UDMA6,
93 MODULE_AUTHOR("Uwe Koziolek");
94 MODULE_DESCRIPTION("low-level driver for Silicon Integrated Systems SATA controller");
95 MODULE_LICENSE("GPL");
96 MODULE_DEVICE_TABLE(pci, sis_pci_tbl);
97 MODULE_VERSION(DRV_VERSION);
99 static unsigned int get_scr_cfg_addr(struct ata_link *link, unsigned int sc_reg)
101 struct ata_port *ap = link->ap;
102 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
103 unsigned int addr = SIS_SCR_BASE + (4 * sc_reg);
107 switch (pdev->device) {
110 pci_read_config_byte(pdev, SIS_PMR, &pmr);
111 if ((pmr & SIS_PMR_COMBINED) == 0)
112 addr += SIS180_SATA1_OFS;
118 addr += SIS182_SATA1_OFS;
128 static u32 sis_scr_cfg_read(struct ata_link *link,
129 unsigned int sc_reg, u32 *val)
131 struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
132 unsigned int cfg_addr = get_scr_cfg_addr(link, sc_reg);
134 if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
137 pci_read_config_dword(pdev, cfg_addr, val);
141 static int sis_scr_cfg_write(struct ata_link *link,
142 unsigned int sc_reg, u32 val)
144 struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
145 unsigned int cfg_addr = get_scr_cfg_addr(link, sc_reg);
147 pci_write_config_dword(pdev, cfg_addr, val);
151 static int sis_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
153 struct ata_port *ap = link->ap;
154 void __iomem *base = ap->ioaddr.scr_addr + link->pmp * 0x10;
156 if (sc_reg > SCR_CONTROL)
159 if (ap->flags & SIS_FLAG_CFGSCR)
160 return sis_scr_cfg_read(link, sc_reg, val);
162 *val = ioread32(base + sc_reg * 4);
166 static int sis_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
168 struct ata_port *ap = link->ap;
169 void __iomem *base = ap->ioaddr.scr_addr + link->pmp * 0x10;
171 if (sc_reg > SCR_CONTROL)
174 if (ap->flags & SIS_FLAG_CFGSCR)
175 return sis_scr_cfg_write(link, sc_reg, val);
177 iowrite32(val, base + (sc_reg * 4));
181 static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
183 struct ata_port_info pi = sis_port_info;
184 const struct ata_port_info *ppi[] = { &pi, &pi };
185 struct ata_host *host;
188 u8 port2_start = 0x20;
191 ata_print_version_once(&pdev->dev, DRV_VERSION);
193 rc = pcim_enable_device(pdev);
197 /* check and see if the SCRs are in IO space or PCI cfg space */
198 pci_read_config_dword(pdev, SIS_GENCTL, &genctl);
199 if ((genctl & GENCTL_IOMAPPED_SCR) == 0)
200 pi.flags |= SIS_FLAG_CFGSCR;
202 /* if hardware thinks SCRs are in IO space, but there are
203 * no IO resources assigned, change to PCI cfg space.
205 if ((!(pi.flags & SIS_FLAG_CFGSCR)) &&
206 ((pci_resource_start(pdev, SIS_SCR_PCI_BAR) == 0) ||
207 (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) {
208 genctl &= ~GENCTL_IOMAPPED_SCR;
209 pci_write_config_dword(pdev, SIS_GENCTL, genctl);
210 pi.flags |= SIS_FLAG_CFGSCR;
213 pci_read_config_byte(pdev, SIS_PMR, &pmr);
214 switch (ent->device) {
218 /* The PATA-handling is provided by pata_sis */
219 switch (pmr & 0x30) {
221 ppi[1] = &sis_info133_for_sata;
225 ppi[0] = &sis_info133_for_sata;
228 if ((pmr & SIS_PMR_COMBINED) == 0) {
230 "Detected SiS 180/181/964 chipset in SATA mode\n");
234 "Detected SiS 180/181 chipset in combined mode\n");
236 pi.flags |= ATA_FLAG_SLAVE_POSS;
242 pci_read_config_dword(pdev, 0x6C, &val);
243 if (val & (1L << 31)) {
244 dev_info(&pdev->dev, "Detected SiS 182/965 chipset\n");
245 pi.flags |= ATA_FLAG_SLAVE_POSS;
247 dev_info(&pdev->dev, "Detected SiS 182/965L chipset\n");
253 "Detected SiS 1182/966/680 SATA controller\n");
254 pi.flags |= ATA_FLAG_SLAVE_POSS;
259 "Detected SiS 1183/966/966L/968/680 controller in PATA mode\n");
260 ppi[0] = &sis_info133_for_sata;
261 ppi[1] = &sis_info133_for_sata;
265 rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host);
269 for (i = 0; i < 2; i++) {
270 struct ata_port *ap = host->ports[i];
272 if (ap->flags & ATA_FLAG_SATA &&
273 ap->flags & ATA_FLAG_SLAVE_POSS) {
274 rc = ata_slave_link_init(ap);
280 if (!(pi.flags & SIS_FLAG_CFGSCR)) {
283 rc = pcim_iomap_regions(pdev, 1 << SIS_SCR_PCI_BAR, DRV_NAME);
286 mmio = host->iomap[SIS_SCR_PCI_BAR];
288 host->ports[0]->ioaddr.scr_addr = mmio;
289 host->ports[1]->ioaddr.scr_addr = mmio + port2_start;
292 pci_set_master(pdev);
294 return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
295 IRQF_SHARED, &sis_sht);
298 module_pci_driver(sis_pci_driver);