2 * sata_sis.c - Silicon Integrated Systems SATA
4 * Maintained by: Uwe Koziolek
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2004 Uwe Koziolek
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; see the file COPYING. If not, write to
23 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
26 * libata documentation is available via 'make {ps|pdf}docs',
27 * as Documentation/DocBook/libata.*
29 * Hardware documentation available under NDA.
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/pci.h>
36 #include <linux/init.h>
37 #include <linux/blkdev.h>
38 #include <linux/delay.h>
39 #include <linux/interrupt.h>
40 #include <linux/device.h>
41 #include <scsi/scsi_host.h>
42 #include <linux/libata.h>
45 #define DRV_NAME "sata_sis"
46 #define DRV_VERSION "1.0"
52 /* PCI configuration registers */
53 SIS_GENCTL = 0x54, /* IDE General Control register */
54 SIS_SCR_BASE = 0xc0, /* sata0 phy SCR registers */
55 SIS180_SATA1_OFS = 0x10, /* offset from sata0->sata1 phy regs */
56 SIS182_SATA1_OFS = 0x20, /* offset from sata0->sata1 phy regs */
57 SIS_PMR = 0x90, /* port mapping register */
58 SIS_PMR_COMBINED = 0x30,
61 SIS_FLAG_CFGSCR = (1 << 30), /* host flag: SCRs via PCI cfg */
63 GENCTL_IOMAPPED_SCR = (1 << 26), /* if set, SCRs are in IO space */
66 static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
67 static int sis_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
68 static int sis_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
70 static const struct pci_device_id sis_pci_tbl[] = {
71 { PCI_VDEVICE(SI, 0x0180), sis_180 }, /* SiS 964/180 */
72 { PCI_VDEVICE(SI, 0x0181), sis_180 }, /* SiS 964/180 */
73 { PCI_VDEVICE(SI, 0x0182), sis_180 }, /* SiS 965/965L */
74 { PCI_VDEVICE(SI, 0x0183), sis_180 }, /* SiS 965/965L */
75 { PCI_VDEVICE(SI, 0x1182), sis_180 }, /* SiS 966/680 */
76 { PCI_VDEVICE(SI, 0x1183), sis_180 }, /* SiS 966/966L/968/680 */
78 { } /* terminate list */
81 static struct pci_driver sis_pci_driver = {
83 .id_table = sis_pci_tbl,
84 .probe = sis_init_one,
85 .remove = ata_pci_remove_one,
88 static struct scsi_host_template sis_sht = {
89 ATA_BMDMA_SHT(DRV_NAME),
92 static struct ata_port_operations sis_ops = {
93 .inherits = &ata_bmdma_port_ops,
94 .scr_read = sis_scr_read,
95 .scr_write = sis_scr_write,
98 static const struct ata_port_info sis_port_info = {
99 .flags = ATA_FLAG_SATA,
100 .pio_mask = ATA_PIO4,
101 .mwdma_mask = ATA_MWDMA2,
102 .udma_mask = ATA_UDMA6,
103 .port_ops = &sis_ops,
106 MODULE_AUTHOR("Uwe Koziolek");
107 MODULE_DESCRIPTION("low-level driver for Silicon Integrated Systems SATA controller");
108 MODULE_LICENSE("GPL");
109 MODULE_DEVICE_TABLE(pci, sis_pci_tbl);
110 MODULE_VERSION(DRV_VERSION);
112 static unsigned int get_scr_cfg_addr(struct ata_link *link, unsigned int sc_reg)
114 struct ata_port *ap = link->ap;
115 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
116 unsigned int addr = SIS_SCR_BASE + (4 * sc_reg);
120 switch (pdev->device) {
123 pci_read_config_byte(pdev, SIS_PMR, &pmr);
124 if ((pmr & SIS_PMR_COMBINED) == 0)
125 addr += SIS180_SATA1_OFS;
131 addr += SIS182_SATA1_OFS;
141 static u32 sis_scr_cfg_read(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 if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
150 pci_read_config_dword(pdev, cfg_addr, val);
154 static int sis_scr_cfg_write(struct ata_link *link,
155 unsigned int sc_reg, u32 val)
157 struct pci_dev *pdev = to_pci_dev(link->ap->host->dev);
158 unsigned int cfg_addr = get_scr_cfg_addr(link, sc_reg);
160 pci_write_config_dword(pdev, cfg_addr, val);
164 static int sis_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
166 struct ata_port *ap = link->ap;
167 void __iomem *base = ap->ioaddr.scr_addr + link->pmp * 0x10;
169 if (sc_reg > SCR_CONTROL)
172 if (ap->flags & SIS_FLAG_CFGSCR)
173 return sis_scr_cfg_read(link, sc_reg, val);
175 *val = ioread32(base + sc_reg * 4);
179 static int sis_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
181 struct ata_port *ap = link->ap;
182 void __iomem *base = ap->ioaddr.scr_addr + link->pmp * 0x10;
184 if (sc_reg > SCR_CONTROL)
187 if (ap->flags & SIS_FLAG_CFGSCR)
188 return sis_scr_cfg_write(link, sc_reg, val);
190 iowrite32(val, base + (sc_reg * 4));
194 static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
196 struct ata_port_info pi = sis_port_info;
197 const struct ata_port_info *ppi[] = { &pi, &pi };
198 struct ata_host *host;
201 u8 port2_start = 0x20;
204 ata_print_version_once(&pdev->dev, DRV_VERSION);
206 rc = pcim_enable_device(pdev);
210 /* check and see if the SCRs are in IO space or PCI cfg space */
211 pci_read_config_dword(pdev, SIS_GENCTL, &genctl);
212 if ((genctl & GENCTL_IOMAPPED_SCR) == 0)
213 pi.flags |= SIS_FLAG_CFGSCR;
215 /* if hardware thinks SCRs are in IO space, but there are
216 * no IO resources assigned, change to PCI cfg space.
218 if ((!(pi.flags & SIS_FLAG_CFGSCR)) &&
219 ((pci_resource_start(pdev, SIS_SCR_PCI_BAR) == 0) ||
220 (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) {
221 genctl &= ~GENCTL_IOMAPPED_SCR;
222 pci_write_config_dword(pdev, SIS_GENCTL, genctl);
223 pi.flags |= SIS_FLAG_CFGSCR;
226 pci_read_config_byte(pdev, SIS_PMR, &pmr);
227 switch (ent->device) {
231 /* The PATA-handling is provided by pata_sis */
232 switch (pmr & 0x30) {
234 ppi[1] = &sis_info133_for_sata;
238 ppi[0] = &sis_info133_for_sata;
241 if ((pmr & SIS_PMR_COMBINED) == 0) {
243 "Detected SiS 180/181/964 chipset in SATA mode\n");
247 "Detected SiS 180/181 chipset in combined mode\n");
249 pi.flags |= ATA_FLAG_SLAVE_POSS;
255 pci_read_config_dword(pdev, 0x6C, &val);
256 if (val & (1L << 31)) {
257 dev_info(&pdev->dev, "Detected SiS 182/965 chipset\n");
258 pi.flags |= ATA_FLAG_SLAVE_POSS;
260 dev_info(&pdev->dev, "Detected SiS 182/965L chipset\n");
266 "Detected SiS 1182/966/680 SATA controller\n");
267 pi.flags |= ATA_FLAG_SLAVE_POSS;
272 "Detected SiS 1183/966/966L/968/680 controller in PATA mode\n");
273 ppi[0] = &sis_info133_for_sata;
274 ppi[1] = &sis_info133_for_sata;
278 rc = ata_pci_bmdma_prepare_host(pdev, ppi, &host);
282 for (i = 0; i < 2; i++) {
283 struct ata_port *ap = host->ports[i];
285 if (ap->flags & ATA_FLAG_SATA &&
286 ap->flags & ATA_FLAG_SLAVE_POSS) {
287 rc = ata_slave_link_init(ap);
293 if (!(pi.flags & SIS_FLAG_CFGSCR)) {
296 rc = pcim_iomap_regions(pdev, 1 << SIS_SCR_PCI_BAR, DRV_NAME);
299 mmio = host->iomap[SIS_SCR_PCI_BAR];
301 host->ports[0]->ioaddr.scr_addr = mmio;
302 host->ports[1]->ioaddr.scr_addr = mmio + port2_start;
305 pci_set_master(pdev);
307 return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
308 IRQF_SHARED, &sis_sht);
311 module_pci_driver(sis_pci_driver);