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         .module                 = THIS_MODULE,
  90         .name                   = DRV_NAME,
  91         .ioctl                  = ata_scsi_ioctl,
  92         .queuecommand           = ata_scsi_queuecmd,
  93         .can_queue              = ATA_DEF_QUEUE,
  94         .this_id                = ATA_SHT_THIS_ID,
  95         .sg_tablesize           = LIBATA_MAX_PRD,
  96         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
  97         .emulated               = ATA_SHT_EMULATED,
  98         .use_clustering         = ATA_SHT_USE_CLUSTERING,
  99         .proc_name              = DRV_NAME,
 100         .dma_boundary           = ATA_DMA_BOUNDARY,
 101         .slave_configure        = ata_scsi_slave_config,
 102         .slave_destroy          = ata_scsi_slave_destroy,
 103         .bios_param             = ata_std_bios_param,
 104 };
 105
 106 static const struct ata_port_operations sis_ops = {
 107         .tf_load                = ata_tf_load,
 108         .tf_read                = ata_tf_read,
 109         .check_status           = ata_check_status,
 110         .exec_command           = ata_exec_command,
 111         .dev_select             = ata_std_dev_select,
 112         .bmdma_setup            = ata_bmdma_setup,
 113         .bmdma_start            = ata_bmdma_start,
 114         .bmdma_stop             = ata_bmdma_stop,
 115         .bmdma_status           = ata_bmdma_status,
 116         .qc_prep                = ata_qc_prep,
 117         .qc_issue               = ata_qc_issue_prot,
 118         .data_xfer              = ata_data_xfer,
 119         .freeze                 = ata_bmdma_freeze,
 120         .thaw                   = ata_bmdma_thaw,
 121         .error_handler          = ata_bmdma_error_handler,
 122         .post_internal_cmd      = ata_bmdma_post_internal_cmd,
 123         .irq_clear              = ata_bmdma_irq_clear,
 124         .irq_on                 = ata_irq_on,
 125         .scr_read               = sis_scr_read,
 126         .scr_write              = sis_scr_write,
 127         .port_start             = ata_port_start,
 128 };
 129
 130 static const struct ata_port_info sis_port_info = {
 131         .flags          = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
 132         .pio_mask       = 0x1f,
 133         .mwdma_mask     = 0x7,
 134         .udma_mask      = ATA_UDMA6,
 135         .port_ops       = &sis_ops,
 136 };
 137
 138 MODULE_AUTHOR("Uwe Koziolek");
 139 MODULE_DESCRIPTION("low-level driver for Silicon Integratad Systems SATA controller");
 140 MODULE_LICENSE("GPL");
 141 MODULE_DEVICE_TABLE(pci, sis_pci_tbl);
 142 MODULE_VERSION(DRV_VERSION);
 143
 144 static unsigned int get_scr_cfg_addr(struct ata_port *ap, unsigned int sc_reg)
 145 {
 146         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 147         unsigned int addr = SIS_SCR_BASE + (4 * sc_reg);
 148         u8 pmr;
 149
 150         if (ap->port_no)  {
 151                 switch (pdev->device) {
 152                 case 0x0180:
 153                 case 0x0181:
 154                         pci_read_config_byte(pdev, SIS_PMR, &pmr);
 155                         if ((pmr & SIS_PMR_COMBINED) == 0)
 156                                 addr += SIS180_SATA1_OFS;
 157                         break;
 158
 159                 case 0x0182:
 160                 case 0x0183:
 161                 case 0x1182:
 162                         addr += SIS182_SATA1_OFS;
 163                         break;
 164                 }
 165         }
 166         return addr;
 167 }
 168
 169 static u32 sis_scr_cfg_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
 170 {
 171         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 172         unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg);
 173         u32 val2 = 0;
 174         u8 pmr;
 175
 176         if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
 177                 return 0xffffffff;
 178
 179         pci_read_config_byte(pdev, SIS_PMR, &pmr);
 180
 181         pci_read_config_dword(pdev, cfg_addr, val);
 182
 183         if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
 184             (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
 185                 pci_read_config_dword(pdev, cfg_addr+0x10, &val2);
 186
 187         *val |= val2;
 188         *val &= 0xfffffffb;     /* avoid problems with powerdowned ports */
 189
 190         return 0;
 191 }
 192
 193 static void sis_scr_cfg_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 194 {
 195         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 196         unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg);
 197         u8 pmr;
 198
 199         if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
 200                 return;
 201
 202         pci_read_config_byte(pdev, SIS_PMR, &pmr);
 203
 204         pci_write_config_dword(pdev, cfg_addr, val);
 205
 206         if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
 207             (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
 208                 pci_write_config_dword(pdev, cfg_addr+0x10, val);
 209 }
 210
 211 static int sis_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
 212 {
 213         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 214         u8 pmr;
 215
 216         if (sc_reg > SCR_CONTROL)
 217                 return -EINVAL;
 218
 219         if (ap->flags & SIS_FLAG_CFGSCR)
 220                 return sis_scr_cfg_read(ap, sc_reg, val);
 221
 222         pci_read_config_byte(pdev, SIS_PMR, &pmr);
 223
 224         *val = ioread32(ap->ioaddr.scr_addr + (sc_reg * 4));
 225
 226         if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
 227             (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
 228                 *val |= ioread32(ap->ioaddr.scr_addr + (sc_reg * 4) + 0x10);
 229
 230         *val &= 0xfffffffb;
 231
 232         return 0;
 233 }
 234
 235 static int sis_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
 236 {
 237         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 238         u8 pmr;
 239
 240         if (sc_reg > SCR_CONTROL)
 241                 return -EINVAL;
 242
 243         pci_read_config_byte(pdev, SIS_PMR, &pmr);
 244
 245         if (ap->flags & SIS_FLAG_CFGSCR)
 246                 sis_scr_cfg_write(ap, sc_reg, val);
 247         else {
 248                 iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4));
 249                 if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
 250                     (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
 251                         iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4)+0x10);
 252         }
 253         return 0;
 254 }
 255
 256 static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 257 {
 258         static int printed_version;
 259         struct ata_port_info pi = sis_port_info;
 260         const struct ata_port_info *ppi[] = { &pi, &pi };
 261         struct ata_host *host;
 262         u32 genctl, val;
 263         u8 pmr;
 264         u8 port2_start = 0x20;
 265         int rc;
 266
 267         if (!printed_version++)
 268                 dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
 269
 270         rc = pcim_enable_device(pdev);
 271         if (rc)
 272                 return rc;
 273
 274         /* check and see if the SCRs are in IO space or PCI cfg space */
 275         pci_read_config_dword(pdev, SIS_GENCTL, &genctl);
 276         if ((genctl & GENCTL_IOMAPPED_SCR) == 0)
 277                 pi.flags |= SIS_FLAG_CFGSCR;
 278
 279         /* if hardware thinks SCRs are in IO space, but there are
 280          * no IO resources assigned, change to PCI cfg space.
 281          */
 282         if ((!(pi.flags & SIS_FLAG_CFGSCR)) &&
 283             ((pci_resource_start(pdev, SIS_SCR_PCI_BAR) == 0) ||
 284              (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) {
 285                 genctl &= ~GENCTL_IOMAPPED_SCR;
 286                 pci_write_config_dword(pdev, SIS_GENCTL, genctl);
 287                 pi.flags |= SIS_FLAG_CFGSCR;
 288         }
 289
 290         pci_read_config_byte(pdev, SIS_PMR, &pmr);
 291         switch (ent->device) {
 292         case 0x0180:
 293         case 0x0181:
 294
 295                 /* The PATA-handling is provided by pata_sis */
 296                 switch (pmr & 0x30) {
 297                 case 0x10:
 298                         ppi[1] = &sis_info133_for_sata;
 299                         break;
 300
 301                 case 0x30:
 302                         ppi[0] = &sis_info133_for_sata;
 303                         break;
 304                 }
 305                 if ((pmr & SIS_PMR_COMBINED) == 0) {
 306                         dev_printk(KERN_INFO, &pdev->dev,
 307                                    "Detected SiS 180/181/964 chipset in SATA mode\n");
 308                         port2_start = 64;
 309                 } else {
 310                         dev_printk(KERN_INFO, &pdev->dev,
 311                                    "Detected SiS 180/181 chipset in combined mode\n");
 312                         port2_start = 0;
 313                         pi.flags |= ATA_FLAG_SLAVE_POSS;
 314                 }
 315                 break;
 316
 317         case 0x0182:
 318         case 0x0183:
 319                 pci_read_config_dword(pdev, 0x6C, &val);
 320                 if (val & (1L << 31)) {
 321                         dev_printk(KERN_INFO, &pdev->dev,
 322                                    "Detected SiS 182/965 chipset\n");
 323                         pi.flags |= ATA_FLAG_SLAVE_POSS;
 324                 } else {
 325                         dev_printk(KERN_INFO, &pdev->dev,
 326                                    "Detected SiS 182/965L chipset\n");
 327                 }
 328                 break;
 329
 330         case 0x1182:
 331                 dev_printk(KERN_INFO, &pdev->dev,
 332                            "Detected SiS 1182/966/680 SATA controller\n");
 333                 pi.flags |= ATA_FLAG_SLAVE_POSS;
 334                 break;
 335
 336         case 0x1183:
 337                 dev_printk(KERN_INFO, &pdev->dev,
 338                            "Detected SiS 1183/966/966L/968/680 controller in PATA mode\n");
 339                 ppi[0] = &sis_info133_for_sata;
 340                 ppi[1] = &sis_info133_for_sata;
 341                 break;
 342         }
 343
 344         rc = ata_pci_prepare_sff_host(pdev, ppi, &host);
 345         if (rc)
 346                 return rc;
 347
 348         if (!(pi.flags & SIS_FLAG_CFGSCR)) {
 349                 void __iomem *mmio;
 350
 351                 rc = pcim_iomap_regions(pdev, 1 << SIS_SCR_PCI_BAR, DRV_NAME);
 352                 if (rc)
 353                         return rc;
 354                 mmio = host->iomap[SIS_SCR_PCI_BAR];
 355
 356                 host->ports[0]->ioaddr.scr_addr = mmio;
 357                 host->ports[1]->ioaddr.scr_addr = mmio + port2_start;
 358         }
 359
 360         pci_set_master(pdev);
 361         pci_intx(pdev, 1);
 362         return ata_host_activate(host, pdev->irq, ata_interrupt, IRQF_SHARED,
 363                                  &sis_sht);
 364 }
 365
 366 static int __init sis_init(void)
 367 {
 368         return pci_register_driver(&sis_pci_driver);
 369 }
 370
 371 static void __exit sis_exit(void)
 372 {
 373         pci_unregister_driver(&sis_pci_driver);
 374 }
 375
 376 module_init(sis_init);
 377 module_exit(sis_exit);