drivers/ata/sata_sis.c

   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);