drivers/scsi/sata_uli.c

   1 /*
   2  *  sata_uli.c - ULi Electronics SATA
   3  *
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2, or (at your option)
   8  *  any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; see the file COPYING.  If not, write to
  17  *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *
  19  *
  20  *  libata documentation is available via 'make {ps|pdf}docs',
  21  *  as Documentation/DocBook/libata.*
  22  *
  23  *  Hardware documentation available under NDA.
  24  *
  25  */
  26
  27 #include <linux/config.h>
  28 #include <linux/kernel.h>
  29 #include <linux/module.h>
  30 #include <linux/pci.h>
  31 #include <linux/init.h>
  32 #include <linux/blkdev.h>
  33 #include <linux/delay.h>
  34 #include <linux/interrupt.h>
  35 #include "scsi.h"
  36 #include <scsi/scsi_host.h>
  37 #include <linux/libata.h>
  38
  39 #define DRV_NAME        "sata_uli"
  40 #define DRV_VERSION     "0.5"
  41
  42 enum {
  43         uli_5289                = 0,
  44         uli_5287                = 1,
  45         uli_5281                = 2,
  46
  47         /* PCI configuration registers */
  48         ULI5287_BASE            = 0x90, /* sata0 phy SCR registers */
  49         ULI5287_OFFS            = 0x10, /* offset from sata0->sata1 phy regs */
  50         ULI5281_BASE            = 0x60, /* sata0 phy SCR  registers */
  51         ULI5281_OFFS            = 0x60, /* offset from sata0->sata1 phy regs */
  52 };
  53
  54 static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
  55 static u32 uli_scr_read (struct ata_port *ap, unsigned int sc_reg);
  56 static void uli_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
  57
  58 static struct pci_device_id uli_pci_tbl[] = {
  59         { PCI_VENDOR_ID_AL, 0x5289, PCI_ANY_ID, PCI_ANY_ID, 0, 0, uli_5289 },
  60         { PCI_VENDOR_ID_AL, 0x5287, PCI_ANY_ID, PCI_ANY_ID, 0, 0, uli_5287 },
  61         { PCI_VENDOR_ID_AL, 0x5281, PCI_ANY_ID, PCI_ANY_ID, 0, 0, uli_5281 },
  62         { }     /* terminate list */
  63 };
  64
  65
  66 static struct pci_driver uli_pci_driver = {
  67         .name                   = DRV_NAME,
  68         .id_table               = uli_pci_tbl,
  69         .probe                  = uli_init_one,
  70         .remove                 = ata_pci_remove_one,
  71 };
  72
  73 static Scsi_Host_Template uli_sht = {
  74         .module                 = THIS_MODULE,
  75         .name                   = DRV_NAME,
  76         .ioctl                  = ata_scsi_ioctl,
  77         .queuecommand           = ata_scsi_queuecmd,
  78         .eh_strategy_handler    = ata_scsi_error,
  79         .can_queue              = ATA_DEF_QUEUE,
  80         .this_id                = ATA_SHT_THIS_ID,
  81         .sg_tablesize           = LIBATA_MAX_PRD,
  82         .max_sectors            = ATA_MAX_SECTORS,
  83         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
  84         .emulated               = ATA_SHT_EMULATED,
  85         .use_clustering         = ATA_SHT_USE_CLUSTERING,
  86         .proc_name              = DRV_NAME,
  87         .dma_boundary           = ATA_DMA_BOUNDARY,
  88         .slave_configure        = ata_scsi_slave_config,
  89         .bios_param             = ata_std_bios_param,
  90         .ordered_flush          = 1,
  91 };
  92
  93 static struct ata_port_operations uli_ops = {
  94         .port_disable           = ata_port_disable,
  95
  96         .tf_load                = ata_tf_load,
  97         .tf_read                = ata_tf_read,
  98         .check_status           = ata_check_status,
  99         .exec_command           = ata_exec_command,
 100         .dev_select             = ata_std_dev_select,
 101
 102         .phy_reset              = sata_phy_reset,
 103
 104         .bmdma_setup            = ata_bmdma_setup,
 105         .bmdma_start            = ata_bmdma_start,
 106         .bmdma_stop             = ata_bmdma_stop,
 107         .bmdma_status           = ata_bmdma_status,
 108         .qc_prep                = ata_qc_prep,
 109         .qc_issue               = ata_qc_issue_prot,
 110
 111         .eng_timeout            = ata_eng_timeout,
 112
 113         .irq_handler            = ata_interrupt,
 114         .irq_clear              = ata_bmdma_irq_clear,
 115
 116         .scr_read               = uli_scr_read,
 117         .scr_write              = uli_scr_write,
 118
 119         .port_start             = ata_port_start,
 120         .port_stop              = ata_port_stop,
 121         .host_stop              = ata_host_stop,
 122 };
 123
 124 static struct ata_port_info uli_port_info = {
 125         .sht            = &uli_sht,
 126         .host_flags     = ATA_FLAG_SATA | ATA_FLAG_SATA_RESET |
 127                           ATA_FLAG_NO_LEGACY,
 128         .pio_mask       = 0x1f,         /* pio0-4 */
 129         .udma_mask      = 0x7f,         /* udma0-6 */
 130         .port_ops       = &uli_ops,
 131 };
 132
 133
 134 MODULE_AUTHOR("Peer Chen");
 135 MODULE_DESCRIPTION("low-level driver for ULi Electronics SATA controller");
 136 MODULE_LICENSE("GPL");
 137 MODULE_DEVICE_TABLE(pci, uli_pci_tbl);
 138 MODULE_VERSION(DRV_VERSION);
 139
 140 static unsigned int get_scr_cfg_addr(struct ata_port *ap, unsigned int sc_reg)
 141 {
 142         return ap->ioaddr.scr_addr + (4 * sc_reg);
 143 }
 144
 145 static u32 uli_scr_cfg_read (struct ata_port *ap, unsigned int sc_reg)
 146 {
 147         struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
 148         unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg);
 149         u32 val;
 150
 151         pci_read_config_dword(pdev, cfg_addr, &val);
 152         return val;
 153 }
 154
 155 static void uli_scr_cfg_write (struct ata_port *ap, unsigned int scr, u32 val)
 156 {
 157         struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
 158         unsigned int cfg_addr = get_scr_cfg_addr(ap, scr);
 159
 160         pci_write_config_dword(pdev, cfg_addr, val);
 161 }
 162
 163 static u32 uli_scr_read (struct ata_port *ap, unsigned int sc_reg)
 164 {
 165         if (sc_reg > SCR_CONTROL)
 166                 return 0xffffffffU;
 167
 168         return uli_scr_cfg_read(ap, sc_reg);
 169 }
 170
 171 static void uli_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
 172 {
 173         if (sc_reg > SCR_CONTROL)       //SCR_CONTROL=2, SCR_ERROR=1, SCR_STATUS=0
 174                 return;
 175
 176         uli_scr_cfg_write(ap, sc_reg, val);
 177 }
 178
 179 /* move to PCI layer, integrate w/ MSI stuff */
 180 static void pci_enable_intx(struct pci_dev *pdev)
 181 {
 182         u16 pci_command;
 183
 184         pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
 185         if (pci_command & PCI_COMMAND_INTX_DISABLE) {
 186                 pci_command &= ~PCI_COMMAND_INTX_DISABLE;
 187                 pci_write_config_word(pdev, PCI_COMMAND, pci_command);
 188         }
 189 }
 190
 191 static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 192 {
 193         struct ata_probe_ent *probe_ent;
 194         struct ata_port_info *ppi;
 195         int rc;
 196         unsigned int board_idx = (unsigned int) ent->driver_data;
 197         int pci_dev_busy = 0;
 198
 199         rc = pci_enable_device(pdev);
 200         if (rc)
 201                 return rc;
 202
 203         rc = pci_request_regions(pdev, DRV_NAME);
 204         if (rc) {
 205                 pci_dev_busy = 1;
 206                 goto err_out;
 207         }
 208
 209         rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
 210         if (rc)
 211                 goto err_out_regions;
 212         rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
 213         if (rc)
 214                 goto err_out_regions;
 215
 216         ppi = &uli_port_info;
 217         probe_ent = ata_pci_init_native_mode(pdev, &ppi);
 218         if (!probe_ent) {
 219                 rc = -ENOMEM;
 220                 goto err_out_regions;
 221         }
 222
 223         switch (board_idx) {
 224         case uli_5287:
 225                 probe_ent->port[0].scr_addr = ULI5287_BASE;
 226                 probe_ent->port[1].scr_addr = ULI5287_BASE + ULI5287_OFFS;
 227                 probe_ent->n_ports = 4;
 228
 229                 probe_ent->port[2].cmd_addr = pci_resource_start(pdev, 0) + 8;
 230                 probe_ent->port[2].altstatus_addr =
 231                 probe_ent->port[2].ctl_addr =
 232                         (pci_resource_start(pdev, 1) | ATA_PCI_CTL_OFS) + 4;
 233                 probe_ent->port[2].bmdma_addr = pci_resource_start(pdev, 4) + 16;
 234                 probe_ent->port[2].scr_addr = ULI5287_BASE + ULI5287_OFFS*4;
 235
 236                 probe_ent->port[3].cmd_addr = pci_resource_start(pdev, 2) + 8;
 237                 probe_ent->port[3].altstatus_addr =
 238                 probe_ent->port[3].ctl_addr =
 239                         (pci_resource_start(pdev, 3) | ATA_PCI_CTL_OFS) + 4;
 240                 probe_ent->port[3].bmdma_addr = pci_resource_start(pdev, 4) + 24;
 241                 probe_ent->port[3].scr_addr = ULI5287_BASE + ULI5287_OFFS*5;
 242
 243                 ata_std_ports(&probe_ent->port[2]);
 244                 ata_std_ports(&probe_ent->port[3]);
 245                 break;
 246
 247         case uli_5289:
 248                 probe_ent->port[0].scr_addr = ULI5287_BASE;
 249                 probe_ent->port[1].scr_addr = ULI5287_BASE + ULI5287_OFFS;
 250                 break;
 251
 252         case uli_5281:
 253                 probe_ent->port[0].scr_addr = ULI5281_BASE;
 254                 probe_ent->port[1].scr_addr = ULI5281_BASE + ULI5281_OFFS;
 255                 break;
 256
 257         default:
 258                 BUG();
 259                 break;
 260         }
 261
 262         pci_set_master(pdev);
 263         pci_enable_intx(pdev);
 264
 265         /* FIXME: check ata_device_add return value */
 266         ata_device_add(probe_ent);
 267         kfree(probe_ent);
 268
 269         return 0;
 270
 271 err_out_regions:
 272         pci_release_regions(pdev);
 273
 274 err_out:
 275         if (!pci_dev_busy)
 276                 pci_disable_device(pdev);
 277         return rc;
 278
 279 }
 280
 281 static int __init uli_init(void)
 282 {
 283         return pci_module_init(&uli_pci_driver);
 284 }
 285
 286 static void __exit uli_exit(void)
 287 {
 288         pci_unregister_driver(&uli_pci_driver);
 289 }
 290
 291
 292 module_init(uli_init);
 293 module_exit(uli_exit);