1 /* 2 * sata_sis.c - Silicon Integrated Systems SATA 3 * 4 * Maintained by: Uwe Koziolek 5 * Please ALWAYS copy linux-ide@vger.kernel.org 6 * on emails. 7 * 8 * Copyright 2004 Uwe Koziolek 9 * 10 * 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) 14 * any later version. 15 * 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. 20 * 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. 24 * 25 * 26 * libata documentation is available via 'make {ps|pdf}docs', 27 * as Documentation/DocBook/libata.* 28 * 29 * Hardware documentation available under NDA. 30 * 31 */ 32 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> 43 #include "sis.h" 44 45 #define DRV_NAME "sata_sis" 46 #define DRV_VERSION "1.0" 47 48 enum { 49 sis_180 = 0, 50 SIS_SCR_PCI_BAR = 5, 51 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, 59 60 /* random bits */ 61 SIS_FLAG_CFGSCR = (1 << 30), /* host flag: SCRs via PCI cfg */ 62 63 GENCTL_IOMAPPED_SCR = (1 << 26), /* if set, SCRs are in IO space */ 64 }; 65 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); 69 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 */ 77 78 { } /* terminate list */ 79 }; 80 81 static struct pci_driver sis_pci_driver = { 82 .name = DRV_NAME, 83 .id_table = sis_pci_tbl, 84 .probe = sis_init_one, 85 .remove = ata_pci_remove_one, 86 }; 87 88 static struct scsi_host_template sis_sht = { 89 ATA_BMDMA_SHT(DRV_NAME), 90 }; 91 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, 96 }; 97 98 static const struct ata_port_info sis_port_info = { 99 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY, 100 .pio_mask = ATA_PIO4, 101 .mwdma_mask = ATA_MWDMA2, 102 .udma_mask = ATA_UDMA6, 103 .port_ops = &sis_ops, 104 }; 105 106 MODULE_AUTHOR("Uwe Koziolek"); 107 MODULE_DESCRIPTION("low-level driver for Silicon Integratad Systems SATA controller"); 108 MODULE_LICENSE("GPL"); 109 MODULE_DEVICE_TABLE(pci, sis_pci_tbl); 110 MODULE_VERSION(DRV_VERSION); 111 112 static unsigned int get_scr_cfg_addr(struct ata_port *ap, unsigned int sc_reg) 113 { 114 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 115 unsigned int addr = SIS_SCR_BASE + (4 * sc_reg); 116 u8 pmr; 117 118 if (ap->port_no) { 119 switch (pdev->device) { 120 case 0x0180: 121 case 0x0181: 122 pci_read_config_byte(pdev, SIS_PMR, &pmr); 123 if ((pmr & SIS_PMR_COMBINED) == 0) 124 addr += SIS180_SATA1_OFS; 125 break; 126 127 case 0x0182: 128 case 0x0183: 129 case 0x1182: 130 addr += SIS182_SATA1_OFS; 131 break; 132 } 133 } 134 return addr; 135 } 136 137 static u32 sis_scr_cfg_read(struct ata_link *link, 138 unsigned int sc_reg, u32 *val) 139 { 140 struct pci_dev *pdev = to_pci_dev(link->ap->host->dev); 141 unsigned int cfg_addr = get_scr_cfg_addr(link->ap, sc_reg); 142 u32 val2 = 0; 143 u8 pmr; 144 145 if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */ 146 return -EINVAL; 147 148 pci_read_config_byte(pdev, SIS_PMR, &pmr); 149 150 pci_read_config_dword(pdev, cfg_addr, val); 151 152 if ((pdev->device == 0x0182) || (pdev->device == 0x0183) || 153 (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED)) 154 pci_read_config_dword(pdev, cfg_addr+0x10, &val2); 155 156 *val |= val2; 157 *val &= 0xfffffffb; /* avoid problems with powerdowned ports */ 158 159 return 0; 160 } 161 162 static int sis_scr_cfg_write(struct ata_link *link, 163 unsigned int sc_reg, u32 val) 164 { 165 struct pci_dev *pdev = to_pci_dev(link->ap->host->dev); 166 unsigned int cfg_addr = get_scr_cfg_addr(link->ap, sc_reg); 167 u8 pmr; 168 169 if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */ 170 return -EINVAL; 171 172 pci_read_config_byte(pdev, SIS_PMR, &pmr); 173 174 pci_write_config_dword(pdev, cfg_addr, val); 175 176 if ((pdev->device == 0x0182) || (pdev->device == 0x0183) || 177 (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED)) 178 pci_write_config_dword(pdev, cfg_addr+0x10, val); 179 180 return 0; 181 } 182 183 static int sis_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) 184 { 185 struct ata_port *ap = link->ap; 186 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 187 u8 pmr; 188 189 if (sc_reg > SCR_CONTROL) 190 return -EINVAL; 191 192 if (ap->flags & SIS_FLAG_CFGSCR) 193 return sis_scr_cfg_read(link, sc_reg, val); 194 195 pci_read_config_byte(pdev, SIS_PMR, &pmr); 196 197 *val = ioread32(ap->ioaddr.scr_addr + (sc_reg * 4)); 198 199 if ((pdev->device == 0x0182) || (pdev->device == 0x0183) || 200 (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED)) 201 *val |= ioread32(ap->ioaddr.scr_addr + (sc_reg * 4) + 0x10); 202 203 *val &= 0xfffffffb; 204 205 return 0; 206 } 207 208 static int sis_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) 209 { 210 struct ata_port *ap = link->ap; 211 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 212 u8 pmr; 213 214 if (sc_reg > SCR_CONTROL) 215 return -EINVAL; 216 217 pci_read_config_byte(pdev, SIS_PMR, &pmr); 218 219 if (ap->flags & SIS_FLAG_CFGSCR) 220 return sis_scr_cfg_write(link, sc_reg, val); 221 else { 222 iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4)); 223 if ((pdev->device == 0x0182) || (pdev->device == 0x0183) || 224 (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED)) 225 iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4)+0x10); 226 return 0; 227 } 228 } 229 230 static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) 231 { 232 static int printed_version; 233 struct ata_port_info pi = sis_port_info; 234 const struct ata_port_info *ppi[] = { &pi, &pi }; 235 struct ata_host *host; 236 u32 genctl, val; 237 u8 pmr; 238 u8 port2_start = 0x20; 239 int rc; 240 241 if (!printed_version++) 242 dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n"); 243 244 rc = pcim_enable_device(pdev); 245 if (rc) 246 return rc; 247 248 /* check and see if the SCRs are in IO space or PCI cfg space */ 249 pci_read_config_dword(pdev, SIS_GENCTL, &genctl); 250 if ((genctl & GENCTL_IOMAPPED_SCR) == 0) 251 pi.flags |= SIS_FLAG_CFGSCR; 252 253 /* if hardware thinks SCRs are in IO space, but there are 254 * no IO resources assigned, change to PCI cfg space. 255 */ 256 if ((!(pi.flags & SIS_FLAG_CFGSCR)) && 257 ((pci_resource_start(pdev, SIS_SCR_PCI_BAR) == 0) || 258 (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) { 259 genctl &= ~GENCTL_IOMAPPED_SCR; 260 pci_write_config_dword(pdev, SIS_GENCTL, genctl); 261 pi.flags |= SIS_FLAG_CFGSCR; 262 } 263 264 pci_read_config_byte(pdev, SIS_PMR, &pmr); 265 switch (ent->device) { 266 case 0x0180: 267 case 0x0181: 268 269 /* The PATA-handling is provided by pata_sis */ 270 switch (pmr & 0x30) { 271 case 0x10: 272 ppi[1] = &sis_info133_for_sata; 273 break; 274 275 case 0x30: 276 ppi[0] = &sis_info133_for_sata; 277 break; 278 } 279 if ((pmr & SIS_PMR_COMBINED) == 0) { 280 dev_printk(KERN_INFO, &pdev->dev, 281 "Detected SiS 180/181/964 chipset in SATA mode\n"); 282 port2_start = 64; 283 } else { 284 dev_printk(KERN_INFO, &pdev->dev, 285 "Detected SiS 180/181 chipset in combined mode\n"); 286 port2_start = 0; 287 pi.flags |= ATA_FLAG_SLAVE_POSS; 288 } 289 break; 290 291 case 0x0182: 292 case 0x0183: 293 pci_read_config_dword(pdev, 0x6C, &val); 294 if (val & (1L << 31)) { 295 dev_printk(KERN_INFO, &pdev->dev, 296 "Detected SiS 182/965 chipset\n"); 297 pi.flags |= ATA_FLAG_SLAVE_POSS; 298 } else { 299 dev_printk(KERN_INFO, &pdev->dev, 300 "Detected SiS 182/965L chipset\n"); 301 } 302 break; 303 304 case 0x1182: 305 dev_printk(KERN_INFO, &pdev->dev, 306 "Detected SiS 1182/966/680 SATA controller\n"); 307 pi.flags |= ATA_FLAG_SLAVE_POSS; 308 break; 309 310 case 0x1183: 311 dev_printk(KERN_INFO, &pdev->dev, 312 "Detected SiS 1183/966/966L/968/680 controller in PATA mode\n"); 313 ppi[0] = &sis_info133_for_sata; 314 ppi[1] = &sis_info133_for_sata; 315 break; 316 } 317 318 rc = ata_pci_sff_prepare_host(pdev, ppi, &host); 319 if (rc) 320 return rc; 321 322 if (!(pi.flags & SIS_FLAG_CFGSCR)) { 323 void __iomem *mmio; 324 325 rc = pcim_iomap_regions(pdev, 1 << SIS_SCR_PCI_BAR, DRV_NAME); 326 if (rc) 327 return rc; 328 mmio = host->iomap[SIS_SCR_PCI_BAR]; 329 330 host->ports[0]->ioaddr.scr_addr = mmio; 331 host->ports[1]->ioaddr.scr_addr = mmio + port2_start; 332 } 333 334 pci_set_master(pdev); 335 pci_intx(pdev, 1); 336 return ata_host_activate(host, pdev->irq, ata_sff_interrupt, 337 IRQF_SHARED, &sis_sht); 338 } 339 340 static int __init sis_init(void) 341 { 342 return pci_register_driver(&sis_pci_driver); 343 } 344 345 static void __exit sis_exit(void) 346 { 347 pci_unregister_driver(&sis_pci_driver); 348 } 349 350 module_init(sis_init); 351 module_exit(sis_exit); 352