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_port *ap, unsigned int sc_reg, u32 *val);
  68 static int sis_scr_write(struct ata_port *ap, 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       = 0x1f,
 101         .mwdma_mask     = 0x7,
 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_port *ap, unsigned int sc_reg, u32 *val)
 138 {
 139         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 140         unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg);
 141         u32 val2 = 0;
 142         u8 pmr;
 143
 144         if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
 145                 return 0xffffffff;
 146
 147         pci_read_config_byte(pdev, SIS_PMR, &pmr);
 148
 149         pci_read_config_dword(pdev, cfg_addr, val);
 150
 151         if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
 152             (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
 153                 pci_read_config_dword(pdev, cfg_addr+0x10, &val2);
 154
 155         *val |= val2;
 156         *val &= 0xfffffffb;     /* avoid problems with powerdowned ports */
 157
 158         return 0;
 159 }
 160
 161 static void sis_scr_cfg_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 162 {
 163         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 164         unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg);
 165         u8 pmr;
 166
 167         if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
 168                 return;
 169
 170         pci_read_config_byte(pdev, SIS_PMR, &pmr);
 171
 172         pci_write_config_dword(pdev, cfg_addr, val);
 173
 174         if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
 175             (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
 176                 pci_write_config_dword(pdev, cfg_addr+0x10, val);
 177 }
 178
 179 static int sis_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
 180 {
 181         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 182         u8 pmr;
 183
 184         if (sc_reg > SCR_CONTROL)
 185                 return -EINVAL;
 186
 187         if (ap->flags & SIS_FLAG_CFGSCR)
 188                 return sis_scr_cfg_read(ap, sc_reg, val);
 189
 190         pci_read_config_byte(pdev, SIS_PMR, &pmr);
 191
 192         *val = ioread32(ap->ioaddr.scr_addr + (sc_reg * 4));
 193
 194         if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
 195             (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
 196                 *val |= ioread32(ap->ioaddr.scr_addr + (sc_reg * 4) + 0x10);
 197
 198         *val &= 0xfffffffb;
 199
 200         return 0;
 201 }
 202
 203 static int sis_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 204 {
 205         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 206         u8 pmr;
 207
 208         if (sc_reg > SCR_CONTROL)
 209                 return -EINVAL;
 210
 211         pci_read_config_byte(pdev, SIS_PMR, &pmr);
 212
 213         if (ap->flags & SIS_FLAG_CFGSCR)
 214                 sis_scr_cfg_write(ap, sc_reg, val);
 215         else {
 216                 iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4));
 217                 if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
 218                     (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
 219                         iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4)+0x10);
 220         }
 221         return 0;
 222 }
 223
 224 static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 225 {
 226         static int printed_version;
 227         struct ata_port_info pi = sis_port_info;
 228         const struct ata_port_info *ppi[] = { &pi, &pi };
 229         struct ata_host *host;
 230         u32 genctl, val;
 231         u8 pmr;
 232         u8 port2_start = 0x20;
 233         int rc;
 234
 235         if (!printed_version++)
 236                 dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
 237
 238         rc = pcim_enable_device(pdev);
 239         if (rc)
 240                 return rc;
 241
 242         /* check and see if the SCRs are in IO space or PCI cfg space */
 243         pci_read_config_dword(pdev, SIS_GENCTL, &genctl);
 244         if ((genctl & GENCTL_IOMAPPED_SCR) == 0)
 245                 pi.flags |= SIS_FLAG_CFGSCR;
 246
 247         /* if hardware thinks SCRs are in IO space, but there are
 248          * no IO resources assigned, change to PCI cfg space.
 249          */
 250         if ((!(pi.flags & SIS_FLAG_CFGSCR)) &&
 251             ((pci_resource_start(pdev, SIS_SCR_PCI_BAR) == 0) ||
 252              (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) {
 253                 genctl &= ~GENCTL_IOMAPPED_SCR;
 254                 pci_write_config_dword(pdev, SIS_GENCTL, genctl);
 255                 pi.flags |= SIS_FLAG_CFGSCR;
 256         }
 257
 258         pci_read_config_byte(pdev, SIS_PMR, &pmr);
 259         switch (ent->device) {
 260         case 0x0180:
 261         case 0x0181:
 262
 263                 /* The PATA-handling is provided by pata_sis */
 264                 switch (pmr & 0x30) {
 265                 case 0x10:
 266                         ppi[1] = &sis_info133_for_sata;
 267                         break;
 268
 269                 case 0x30:
 270                         ppi[0] = &sis_info133_for_sata;
 271                         break;
 272                 }
 273                 if ((pmr & SIS_PMR_COMBINED) == 0) {
 274                         dev_printk(KERN_INFO, &pdev->dev,
 275                                    "Detected SiS 180/181/964 chipset in SATA mode\n");
 276                         port2_start = 64;
 277                 } else {
 278                         dev_printk(KERN_INFO, &pdev->dev,
 279                                    "Detected SiS 180/181 chipset in combined mode\n");
 280                         port2_start = 0;
 281                         pi.flags |= ATA_FLAG_SLAVE_POSS;
 282                 }
 283                 break;
 284
 285         case 0x0182:
 286         case 0x0183:
 287                 pci_read_config_dword(pdev, 0x6C, &val);
 288                 if (val & (1L << 31)) {
 289                         dev_printk(KERN_INFO, &pdev->dev,
 290                                    "Detected SiS 182/965 chipset\n");
 291                         pi.flags |= ATA_FLAG_SLAVE_POSS;
 292                 } else {
 293                         dev_printk(KERN_INFO, &pdev->dev,
 294                                    "Detected SiS 182/965L chipset\n");
 295                 }
 296                 break;
 297
 298         case 0x1182:
 299                 dev_printk(KERN_INFO, &pdev->dev,
 300                            "Detected SiS 1182/966/680 SATA controller\n");
 301                 pi.flags |= ATA_FLAG_SLAVE_POSS;
 302                 break;
 303
 304         case 0x1183:
 305                 dev_printk(KERN_INFO, &pdev->dev,
 306                            "Detected SiS 1183/966/966L/968/680 controller in PATA mode\n");
 307                 ppi[0] = &sis_info133_for_sata;
 308                 ppi[1] = &sis_info133_for_sata;
 309                 break;
 310         }
 311
 312         rc = ata_pci_sff_prepare_host(pdev, ppi, &host);
 313         if (rc)
 314                 return rc;
 315
 316         if (!(pi.flags & SIS_FLAG_CFGSCR)) {
 317                 void __iomem *mmio;
 318
 319                 rc = pcim_iomap_regions(pdev, 1 << SIS_SCR_PCI_BAR, DRV_NAME);
 320                 if (rc)
 321                         return rc;
 322                 mmio = host->iomap[SIS_SCR_PCI_BAR];
 323
 324                 host->ports[0]->ioaddr.scr_addr = mmio;
 325                 host->ports[1]->ioaddr.scr_addr = mmio + port2_start;
 326         }
 327
 328         pci_set_master(pdev);
 329         pci_intx(pdev, 1);
 330         return ata_host_activate(host, pdev->irq, ata_sff_interrupt,
 331                                  IRQF_SHARED, &sis_sht);
 332 }
 333
 334 static int __init sis_init(void)
 335 {
 336         return pci_register_driver(&sis_pci_driver);
 337 }
 338
 339 static void __exit sis_exit(void)
 340 {
 341         pci_unregister_driver(&sis_pci_driver);
 342 }
 343
 344 module_init(sis_init);
 345 module_exit(sis_exit);