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     "2.0"
  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         .can_queue              = ATA_DEF_QUEUE,
  98         .this_id                = ATA_SHT_THIS_ID,
  99         .sg_tablesize           = LIBATA_MAX_PRD,
 100         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 101         .emulated               = ATA_SHT_EMULATED,
 102         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 103         .proc_name              = DRV_NAME,
 104         .dma_boundary           = ATA_DMA_BOUNDARY,
 105         .slave_configure        = ata_scsi_slave_config,
 106         .slave_destroy          = ata_scsi_slave_destroy,
 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         .bmdma_setup            = ata_bmdma_setup,
 120         .bmdma_start            = ata_bmdma_start,
 121         .bmdma_stop             = ata_bmdma_stop,
 122         .bmdma_status           = ata_bmdma_status,
 123
 124         .qc_prep                = ata_qc_prep,
 125         .qc_issue               = ata_qc_issue_prot,
 126         .data_xfer              = ata_pio_data_xfer,
 127
 128         .freeze                 = ata_bmdma_freeze,
 129         .thaw                   = ata_bmdma_thaw,
 130         .error_handler          = ata_bmdma_error_handler,
 131         .post_internal_cmd      = ata_bmdma_post_internal_cmd,
 132
 133         .irq_handler            = ata_interrupt,
 134         .irq_clear              = ata_bmdma_irq_clear,
 135
 136         .scr_read               = svia_scr_read,
 137         .scr_write              = svia_scr_write,
 138
 139         .port_start             = ata_port_start,
 140         .port_stop              = ata_port_stop,
 141         .host_stop              = ata_host_stop,
 142 };
 143
 144 static struct ata_port_info svia_port_info = {
 145         .sht            = &svia_sht,
 146         .host_flags     = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
 147         .pio_mask       = 0x1f,
 148         .mwdma_mask     = 0x07,
 149         .udma_mask      = 0x7f,
 150         .port_ops       = &svia_sata_ops,
 151 };
 152
 153 MODULE_AUTHOR("Jeff Garzik");
 154 MODULE_DESCRIPTION("SCSI low-level driver for VIA SATA controllers");
 155 MODULE_LICENSE("GPL");
 156 MODULE_DEVICE_TABLE(pci, svia_pci_tbl);
 157 MODULE_VERSION(DRV_VERSION);
 158
 159 static u32 svia_scr_read (struct ata_port *ap, unsigned int sc_reg)
 160 {
 161         if (sc_reg > SCR_CONTROL)
 162                 return 0xffffffffU;
 163         return inl(ap->ioaddr.scr_addr + (4 * sc_reg));
 164 }
 165
 166 static void svia_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
 167 {
 168         if (sc_reg > SCR_CONTROL)
 169                 return;
 170         outl(val, ap->ioaddr.scr_addr + (4 * sc_reg));
 171 }
 172
 173 static const unsigned int svia_bar_sizes[] = {
 174         8, 4, 8, 4, 16, 256
 175 };
 176
 177 static const unsigned int vt6421_bar_sizes[] = {
 178         16, 16, 16, 16, 32, 128
 179 };
 180
 181 static unsigned long svia_scr_addr(unsigned long addr, unsigned int port)
 182 {
 183         return addr + (port * 128);
 184 }
 185
 186 static unsigned long vt6421_scr_addr(unsigned long addr, unsigned int port)
 187 {
 188         return addr + (port * 64);
 189 }
 190
 191 static void vt6421_init_addrs(struct ata_probe_ent *probe_ent,
 192                               struct pci_dev *pdev,
 193                               unsigned int port)
 194 {
 195         unsigned long reg_addr = pci_resource_start(pdev, port);
 196         unsigned long bmdma_addr = pci_resource_start(pdev, 4) + (port * 8);
 197         unsigned long scr_addr;
 198
 199         probe_ent->port[port].cmd_addr = reg_addr;
 200         probe_ent->port[port].altstatus_addr =
 201         probe_ent->port[port].ctl_addr = (reg_addr + 8) | ATA_PCI_CTL_OFS;
 202         probe_ent->port[port].bmdma_addr = bmdma_addr;
 203
 204         scr_addr = vt6421_scr_addr(pci_resource_start(pdev, 5), port);
 205         probe_ent->port[port].scr_addr = scr_addr;
 206
 207         ata_std_ports(&probe_ent->port[port]);
 208 }
 209
 210 static struct ata_probe_ent *vt6420_init_probe_ent(struct pci_dev *pdev)
 211 {
 212         struct ata_probe_ent *probe_ent;
 213         struct ata_port_info *ppi = &svia_port_info;
 214
 215         probe_ent = ata_pci_init_native_mode(pdev, &ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
 216         if (!probe_ent)
 217                 return NULL;
 218
 219         probe_ent->port[0].scr_addr =
 220                 svia_scr_addr(pci_resource_start(pdev, 5), 0);
 221         probe_ent->port[1].scr_addr =
 222                 svia_scr_addr(pci_resource_start(pdev, 5), 1);
 223
 224         return probe_ent;
 225 }
 226
 227 static struct ata_probe_ent *vt6421_init_probe_ent(struct pci_dev *pdev)
 228 {
 229         struct ata_probe_ent *probe_ent;
 230         unsigned int i;
 231
 232         probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
 233         if (!probe_ent)
 234                 return NULL;
 235
 236         memset(probe_ent, 0, sizeof(*probe_ent));
 237         probe_ent->dev = pci_dev_to_dev(pdev);
 238         INIT_LIST_HEAD(&probe_ent->node);
 239
 240         probe_ent->sht          = &svia_sht;
 241         probe_ent->host_flags   = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY;
 242         probe_ent->port_ops     = &svia_sata_ops;
 243         probe_ent->n_ports      = N_PORTS;
 244         probe_ent->irq          = pdev->irq;
 245         probe_ent->irq_flags    = IRQF_SHARED;
 246         probe_ent->pio_mask     = 0x1f;
 247         probe_ent->mwdma_mask   = 0x07;
 248         probe_ent->udma_mask    = 0x7f;
 249
 250         for (i = 0; i < N_PORTS; i++)
 251                 vt6421_init_addrs(probe_ent, pdev, i);
 252
 253         return probe_ent;
 254 }
 255
 256 static void svia_configure(struct pci_dev *pdev)
 257 {
 258         u8 tmp8;
 259
 260         pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &tmp8);
 261         dev_printk(KERN_INFO, &pdev->dev, "routed to hard irq line %d\n",
 262                (int) (tmp8 & 0xf0) == 0xf0 ? 0 : tmp8 & 0x0f);
 263
 264         /* make sure SATA channels are enabled */
 265         pci_read_config_byte(pdev, SATA_CHAN_ENAB, &tmp8);
 266         if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
 267                 dev_printk(KERN_DEBUG, &pdev->dev,
 268                            "enabling SATA channels (0x%x)\n",
 269                            (int) tmp8);
 270                 tmp8 |= ALL_PORTS;
 271                 pci_write_config_byte(pdev, SATA_CHAN_ENAB, tmp8);
 272         }
 273
 274         /* make sure interrupts for each channel sent to us */
 275         pci_read_config_byte(pdev, SATA_INT_GATE, &tmp8);
 276         if ((tmp8 & ALL_PORTS) != ALL_PORTS) {
 277                 dev_printk(KERN_DEBUG, &pdev->dev,
 278                            "enabling SATA channel interrupts (0x%x)\n",
 279                            (int) tmp8);
 280                 tmp8 |= ALL_PORTS;
 281                 pci_write_config_byte(pdev, SATA_INT_GATE, tmp8);
 282         }
 283
 284         /* make sure native mode is enabled */
 285         pci_read_config_byte(pdev, SATA_NATIVE_MODE, &tmp8);
 286         if ((tmp8 & NATIVE_MODE_ALL) != NATIVE_MODE_ALL) {
 287                 dev_printk(KERN_DEBUG, &pdev->dev,
 288                            "enabling SATA channel native mode (0x%x)\n",
 289                            (int) tmp8);
 290                 tmp8 |= NATIVE_MODE_ALL;
 291                 pci_write_config_byte(pdev, SATA_NATIVE_MODE, tmp8);
 292         }
 293 }
 294
 295 static int svia_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 296 {
 297         static int printed_version;
 298         unsigned int i;
 299         int rc;
 300         struct ata_probe_ent *probe_ent;
 301         int board_id = (int) ent->driver_data;
 302         const int *bar_sizes;
 303         int pci_dev_busy = 0;
 304         u8 tmp8;
 305
 306         if (!printed_version++)
 307                 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
 308
 309         rc = pci_enable_device(pdev);
 310         if (rc)
 311                 return rc;
 312
 313         rc = pci_request_regions(pdev, DRV_NAME);
 314         if (rc) {
 315                 pci_dev_busy = 1;
 316                 goto err_out;
 317         }
 318
 319         if (board_id == vt6420) {
 320                 pci_read_config_byte(pdev, SATA_PATA_SHARING, &tmp8);
 321                 if (tmp8 & SATA_2DEV) {
 322                         dev_printk(KERN_ERR, &pdev->dev,
 323                                    "SATA master/slave not supported (0x%x)\n",
 324                                    (int) tmp8);
 325                         rc = -EIO;
 326                         goto err_out_regions;
 327                 }
 328
 329                 bar_sizes = &svia_bar_sizes[0];
 330         } else {
 331                 bar_sizes = &vt6421_bar_sizes[0];
 332         }
 333
 334         for (i = 0; i < ARRAY_SIZE(svia_bar_sizes); i++)
 335                 if ((pci_resource_start(pdev, i) == 0) ||
 336                     (pci_resource_len(pdev, i) < bar_sizes[i])) {
 337                         dev_printk(KERN_ERR, &pdev->dev,
 338                                 "invalid PCI BAR %u (sz 0x%llx, val 0x%llx)\n",
 339                                 i,
 340                                 (unsigned long long)pci_resource_start(pdev, i),
 341                                 (unsigned long long)pci_resource_len(pdev, i));
 342                         rc = -ENODEV;
 343                         goto err_out_regions;
 344                 }
 345
 346         rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
 347         if (rc)
 348                 goto err_out_regions;
 349         rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
 350         if (rc)
 351                 goto err_out_regions;
 352
 353         if (board_id == vt6420)
 354                 probe_ent = vt6420_init_probe_ent(pdev);
 355         else
 356                 probe_ent = vt6421_init_probe_ent(pdev);
 357
 358         if (!probe_ent) {
 359                 dev_printk(KERN_ERR, &pdev->dev, "out of memory\n");
 360                 rc = -ENOMEM;
 361                 goto err_out_regions;
 362         }
 363
 364         svia_configure(pdev);
 365
 366         pci_set_master(pdev);
 367
 368         /* FIXME: check ata_device_add return value */
 369         ata_device_add(probe_ent);
 370         kfree(probe_ent);
 371
 372         return 0;
 373
 374 err_out_regions:
 375         pci_release_regions(pdev);
 376 err_out:
 377         if (!pci_dev_busy)
 378                 pci_disable_device(pdev);
 379         return rc;
 380 }
 381
 382 static int __init svia_init(void)
 383 {
 384         return pci_register_driver(&svia_pci_driver);
 385 }
 386
 387 static void __exit svia_exit(void)
 388 {
 389         pci_unregister_driver(&svia_pci_driver);
 390 }
 391
 392 module_init(svia_init);
 393 module_exit(svia_exit);
 394