drivers/scsi/sata_via.c

   1 /*
   2  *  sata_via.c - VIA Serial ATA controllers
   3  *
   4  *  Maintained by:  Jeff Garzik <jgarzik@pobox.com>
   5  *                 Please ALWAYS copy linux-ide@vger.kernel.org
   6                    on emails.
   7  *
   8  *  Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
   9  *  Copyright 2003-2004 Jeff Garzik
  10  *
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2, or (at your option)
  15  *  any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; see the file COPYING.  If not, write to
  24  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  25  *
  26  *
  27  *  libata documentation is available via 'make {ps|pdf}docs',
  28  *  as Documentation/DocBook/libata.*
  29  *
  30  *  Hardware documentation available under NDA.
  31  *
  32  *
  33  *  To-do list:
  34  *  - VT6421 PATA support
  35  *
  36  */
  37
  38 #include <linux/kernel.h>
  39 #include <linux/module.h>
  40 #include <linux/pci.h>
  41 #include <linux/init.h>
  42 #include <linux/blkdev.h>
  43 #include <linux/delay.h>
  44 #include <linux/device.h>
  45 #include "scsi.h"
  46 #include <scsi/scsi_host.h>
  47 #include <linux/libata.h>
  48 #include <asm/io.h>
  49
  50 #define DRV_NAME        "sata_via"
  51 #define DRV_VERSION     "1.1"
  52
  53 enum board_ids_enum {
  54         vt6420,
  55         vt6421,
  56 };
  57
  58 enum {
  59         SATA_CHAN_ENAB          = 0x40, /* SATA channel enable */
  60         SATA_INT_GATE           = 0x41, /* SATA interrupt gating */
  61         SATA_NATIVE_MODE        = 0x42, /* Native mode enable */
  62         SATA_PATA_SHARING       = 0x49, /* PATA/SATA sharing func ctrl */
  63
  64         PORT0                   = (1 << 1),
  65         PORT1                   = (1 << 0),
  66         ALL_PORTS               = PORT0 | PORT1,
  67         N_PORTS                 = 2,
  68
  69         NATIVE_MODE_ALL         = (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4),
  70
  71         SATA_EXT_PHY            = (1 << 6), /* 0==use PATA, 1==ext phy */
  72         SATA_2DEV               = (1 << 5), /* SATA is master/slave */
  73 };
  74
  75 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
  76 static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg);
  77 static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
  78
  79 static struct pci_device_id svia_pci_tbl[] = {
  80         { 0x1106, 0x3149, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6420 },
  81         { 0x1106, 0x3249, PCI_ANY_ID, PCI_ANY_ID, 0, 0, vt6421 },
  82
  83         { }     /* terminate list */
  84 };
  85
  86 static struct pci_driver svia_pci_driver = {
  87         .name                   = DRV_NAME,
  88         .id_table               = svia_pci_tbl,
  89         .probe                  = svia_init_one,
  90         .remove                 = ata_pci_remove_one,
  91 };
  92
  93 static Scsi_Host_Template svia_sht = {
  94         .module                 = THIS_MODULE,
  95         .name                   = DRV_NAME,
  96         .ioctl                  = ata_scsi_ioctl,
  97         .queuecommand           = ata_scsi_queuecmd,
  98         .eh_strategy_handler    = ata_scsi_error,
  99         .can_queue              = ATA_DEF_QUEUE,
 100         .this_id                = ATA_SHT_THIS_ID,
 101         .sg_tablesize           = LIBATA_MAX_PRD,
 102         .max_sectors            = ATA_MAX_SECTORS,
 103         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 104         .emulated               = ATA_SHT_EMULATED,
 105         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 106         .proc_name              = DRV_NAME,
 107         .dma_boundary           = ATA_DMA_BOUNDARY,
 108         .slave_configure        = ata_scsi_slave_config,
 109         .bios_param             = ata_std_bios_param,
 110         .ordered_flush          = 1,
 111 };
 112
 113 static const struct ata_port_operations svia_sata_ops = {
 114         .port_disable           = ata_port_disable,
 115
 116         .tf_load                = ata_tf_load,
 117         .tf_read                = ata_tf_read,
 118         .check_status           = ata_check_status,
 119         .exec_command           = ata_exec_command,
 120         .dev_select             = ata_std_dev_select,
 121
 122         .phy_reset              = sata_phy_reset,
 123
 124         .bmdma_setup            = ata_bmdma_setup,
 125         .bmdma_start            = ata_bmdma_start,
 126         .bmdma_stop             = ata_bmdma_stop,
 127         .bmdma_status           = ata_bmdma_status,
 128
 129         .qc_prep                = ata_qc_prep,
 130         .qc_issue               = ata_qc_issue_prot,
 131
 132         .eng_timeout            = ata_eng_timeout,
 133
 134         .irq_handler            = ata_interrupt,
 135         .irq_clear              = ata_bmdma_irq_clear,
 136
 137         .scr_read               = svia_scr_read,
 138         .scr_write              = svia_scr_write,
 139
 140         .port_start             = ata_port_start,
 141         .port_stop              = ata_port_stop,
 142         .host_stop              = ata_host_stop,
 143 };
 144
 145 static struct ata_port_info svia_port_info = {
 146         .sht            = &svia_sht,
 147         .host_flags     = ATA_FLAG_SATA | ATA_FLAG_SRST | ATA_FLAG_NO_LEGACY,
 148         .pio_mask       = 0x1f,
 149         .mwdma_mask     = 0x07,
 150         .udma_mask      = 0x7f,
 151         .port_ops       = &svia_sata_ops,
 152 };
 153
 154 MODULE_AUTHOR("Jeff Garzik");
 155 MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
 156 MODULE_LICENSE("GPL");
 157 MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
 158 MODULE_VERSION(DRV_VERSION);
 159
 160 static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
 161 {
 162         if (sc_reg > SCR_CONTROL)
 163                 return 0xffffffffU;
 164         return inl(ap->ioaddr.scr_addr + (4 * sc_reg));
 165 }
 166
 167 static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
 168 {
 169         if (sc_reg > SCR_CONTROL)
 170                 return;
 171         outl(val, ap->ioaddr.scr_addr + (4 * sc_reg));
 172 }
 173
 174 static const unsigned int svia_bar_sizes[] = {
 175         8, 4, 8, 4, 16, 256
 176 };
 177
 178 static const unsigned int vt6421_bar_sizes[] = {
 179         16, 16, 16, 16, 32, 128
 180 };
 181
 182 static unsigned long svia_scr_addr(unsigned long addr, unsigned int port)
 183 {
 184         return addr + (port * 128);
 185 }
 186
 187 static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port)
 188 {
 189         return addr + (port * 64);
 190 }
 191
 192 static void vt6421_init_addrs(struct ata_probe_ent *probe_ent,
 193                               struct pci_dev *pdev,
 194                               unsigned int port)
 195 {
 196         unsigned long reg_addr = pci_resource_start(pdev, port);
 197         unsigned long bmdma_addr = pci_resource_start(pdev, 4) + (port * 8);
 198         unsigned long scr_addr;
 199
 200         probe_ent->port[port].cmd_addr = reg_addr;
 201         probe_ent->port[port].altstatus_addr =
 202         probe_ent->port[port].ctl_addr = (reg_addr + 8) | ATA_PCI_CTL_OFS;
 203         probe_ent->port[port].bmdma_addr = bmdma_addr;
 204
 205         scr_addr = vt6421_scr_addr(pci_resource_start(pdev, 5), port);
 206         probe_ent->port[port].scr_addr = scr_addr;
 207
 208         ata_std_ports(&probe_ent->port[port]);
 209 }
 210
 211 static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev)
 212 {
 213         struct ata_probe_ent *probe_ent;
 214         struct ata_port_info *ppi = &svia_port_info;
 215
 216         probe_ent = ata_pci_init_native_mode(pdev, &ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
 217         if (!probe_ent)
 218                 return NULL;
 219
 220         probe_ent->port[0].scr_addr =
 221                 svia_scr_addr(pci_resource_start(pdev, 5), 0);
 222         probe_ent->port[1].scr_addr =
 223                 svia_scr_addr(pci_resource_start(pdev, 5), 1);
 224
 225         return probe_ent;
 226 }
 227
 228 static struct ata_probe_ent *vt6421_init_probe_ent(struct pci_dev *pdev)
 229 {
 230         struct ata_probe_ent *probe_ent;
 231         unsigned int i;
 232
 233         probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
 234         if (!probe_ent)
 235                 return NULL;
 236
 237         memset(probe_ent, 0, sizeof(*probe_ent));
 238         probe_ent->dev = pci_dev_to_dev(pdev);
 239         INIT_LIST_HEAD(&probe_ent->node);
 240
 241         probe_ent->sht          = &svia_sht;
 242         probe_ent->host_flags   = ATA_FLAG_SATA | ATA_FLAG_SATA_RESET |
 243                                   ATA_FLAG_NO_LEGACY;
 244         probe_ent->port_ops     = &svia_sata_ops;
 245         probe_ent->n_ports      = N_PORTS;
 246         probe_ent->irq          = pdev->irq;
 247         probe_ent->irq_flags    = SA_SHIRQ;
 248         probe_ent->pio_mask     = 0x1f;
 249         probe_ent->mwdma_mask   = 0x07;
 250         probe_ent->udma_mask    = 0x7f;
 251
 252         for (i = 0; i < N_PORTS; i++)
 253                 vt6421_init_addrs(probe_ent, pdev, i);
 254
 255         return probe_ent;
 256 }
 257
 258 static void svia_configure(struct pci_dev *pdev)
 259 {
 260         u8 tmp8;
 261
 262         pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
 263         dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
 264                (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
 265
 266         /* make sure SATA channels are enabled */
 267         pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
 268         if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
 269                 dev_printk(KERN_DEBUG, &pdev->dev,
 270                            "enabling SATA channels (0x%x)\n",
 271                            (int) tmp8);
 272                 tmp8 |= ALL_PORTS;
 273                 pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
 274         }
 275
 276         /* make sure interrupts for each channel sent to us */
 277         pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
 278         if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
 279                 dev_printk(KERN_DEBUG, &pdev->dev,
 280                            "enabling SATA channel interrupts (0x%x)\n",
 281                            (int) tmp8);
 282                 tmp8 |= ALL_PORTS;
 283                 pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
 284         }
 285
 286         /* make sure native mode is enabled */
 287         pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
 288         if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
 289                 dev_printk(KERN_DEBUG, &pdev->dev,
 290                            "enabling SATA channel native mode (0x%x)\n",
 291                            (int) tmp8);
 292                 tmp8 |= NATIVE_MODE_ALL;
 293                 pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
 294         }
 295 }
 296
 297 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 298 {
 299         static int printed_version;
 300         unsigned int i;
 301         int rc;
 302         struct ata_probe_ent *probe_ent;
 303         int board_id = (int) ent->driver_data;
 304         const int *bar_sizes;
 305         int pci_dev_busy = 0;
 306         u8 tmp8;
 307
 308         if (!printed_version++)
 309                 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
 310
 311         rc = pci_enable_device(pdev);
 312         if (rc)
 313                 return rc;
 314
 315         rc = pci_request_regions(pdev, DRV_NAME);
 316         if (rc) {
 317                 pci_dev_busy = 1;
 318                 goto err_out;
 319         }
 320
 321         if (board_id == vt6420) {
 322                 pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
 323                 if (tmp8 & SATA_2DEV) {
 324                         dev_printk(KERN_ERR, &pdev->dev,
 325                                    "SATA master/slave not supported (0x%x)\n",
 326                                    (int) tmp8);
 327                         rc = -EIO;
 328                         goto err_out_regions;
 329                 }
 330
 331                 bar_sizes = &svia_bar_sizes[0];
 332         } else {
 333                 bar_sizes = &vt6421_bar_sizes[0];
 334         }
 335
 336         for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
 337                 if ((pci_resource_start(pdev, i) == 0) ||
 338                     (pci_resource_len(pdev, i) < bar_sizes[i])) {
 339                         dev_printk(KERN_ERR, &pdev->dev,
 340                                    "invalid PCI BAR %u (sz 0x%lx, val 0x%lx)\n",
 341                                    i,
 342                                    pci_resource_start(pdev, i),
 343                                    pci_resource_len(pdev, i));
 344                         rc = -ENODEV;
 345                         goto err_out_regions;
 346                 }
 347
 348         rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
 349         if (rc)
 350                 goto err_out_regions;
 351         rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
 352         if (rc)
 353                 goto err_out_regions;
 354
 355         if (board_id == vt6420)
 356                 probe_ent = vt6420_init_probe_ent(pdev);
 357         else
 358                 probe_ent = vt6421_init_probe_ent(pdev);
 359
 360         if (!probe_ent) {
 361                 dev_printk(KERN_ERR, &pdev->dev, "out of memory\n");
 362                 rc = -ENOMEM;
 363                 goto err_out_regions;
 364         }
 365
 366         svia_configure(pdev);
 367
 368         pci_set_master(pdev);
 369
 370         /* FIXME: check ata_device_add return value */
 371         ata_device_add(probe_ent);
 372         kfree(probe_ent);
 373
 374         return 0;
 375
 376 err_out_regions:
 377         pci_release_regions(pdev);
 378 err_out:
 379         if (!pci_dev_busy)
 380                 pci_disable_device(pdev);
 381         return rc;
 382 }
 383
 384 static int __init svia_init(void)
 385 {
 386         return pci_module_init(&svia_pci_driver);
 387 }
 388
 389 static void __exit svia_exit(void)
 390 {
 391         pci_unregister_driver(&svia_pci_driver);
 392 }
 393
 394 module_init(svia_init);
 395 module_exit(svia_exit);
 396