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