drivers/ata/pata_atiixp.c

   1 /*
   2  * pata_atiixp.c        - ATI PATA for new ATA layer
   3  *                        (C) 2005 Red Hat Inc
   4  *                        Alan Cox <alan@redhat.com>
   5  *
   6  * Based on
   7  *
   8  *  linux/drivers/ide/pci/atiixp.c      Version 0.01-bart2      Feb. 26, 2004
   9  *
  10  *  Copyright (C) 2003 ATI Inc. <hyu@ati.com>
  11  *  Copyright (C) 2004 Bartlomiej Zolnierkiewicz
  12  *
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/module.h>
  17 #include <linux/pci.h>
  18 #include <linux/init.h>
  19 #include <linux/blkdev.h>
  20 #include <linux/delay.h>
  21 #include <scsi/scsi_host.h>
  22 #include <linux/libata.h>
  23
  24 #define DRV_NAME "pata_atiixp"
  25 #define DRV_VERSION "0.4.5"
  26
  27 enum {
  28         ATIIXP_IDE_PIO_TIMING   = 0x40,
  29         ATIIXP_IDE_MWDMA_TIMING = 0x44,
  30         ATIIXP_IDE_PIO_CONTROL  = 0x48,
  31         ATIIXP_IDE_PIO_MODE     = 0x4a,
  32         ATIIXP_IDE_UDMA_CONTROL = 0x54,
  33         ATIIXP_IDE_UDMA_MODE    = 0x56
  34 };
  35
  36 static int atiixp_pre_reset(struct ata_port *ap)
  37 {
  38         static const struct pci_bits atiixp_enable_bits[] = {
  39                 { 0x48, 1, 0x01, 0x00 },
  40                 { 0x48, 1, 0x08, 0x00 }
  41         };
  42         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  43
  44         if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no]))
  45                 return -ENOENT;
  46
  47         return ata_std_prereset(ap);
  48 }
  49
  50 static void atiixp_error_handler(struct ata_port *ap)
  51 {
  52         ata_bmdma_drive_eh(ap, atiixp_pre_reset, ata_std_softreset, NULL,   ata_std_postreset);
  53 }
  54
  55 static int atiixp_cable_detect(struct ata_port *ap)
  56 {
  57         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  58         u8 udma;
  59
  60         /* Hack from drivers/ide/pci. Really we want to know how to do the
  61            raw detection not play follow the bios mode guess */
  62         pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ap->port_no, &udma);
  63         if ((udma & 0x07) >= 0x04 || (udma & 0x70) >= 0x40)
  64                 return  ATA_CBL_PATA80;
  65         return ATA_CBL_PATA40;
  66 }
  67
  68 /**
  69  *      atiixp_set_pio_timing   -       set initial PIO mode data
  70  *      @ap: ATA interface
  71  *      @adev: ATA device
  72  *
  73  *      Called by both the pio and dma setup functions to set the controller
  74  *      timings for PIO transfers. We must load both the mode number and
  75  *      timing values into the controller.
  76  */
  77
  78 static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio)
  79 {
  80         static u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
  81
  82         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  83         int dn = 2 * ap->port_no + adev->devno;
  84
  85         /* Check this is correct - the order is odd in both drivers */
  86         int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
  87         u16 pio_mode_data, pio_timing_data;
  88
  89         pci_read_config_word(pdev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
  90         pio_mode_data &= ~(0x7 << (4 * dn));
  91         pio_mode_data |= pio << (4 * dn);
  92         pci_write_config_word(pdev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
  93
  94         pci_read_config_word(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
  95         pio_mode_data &= ~(0xFF << timing_shift);
  96         pio_mode_data |= (pio_timings[pio] << timing_shift);
  97         pci_write_config_word(pdev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
  98 }
  99
 100 /**
 101  *      atiixp_set_piomode      -       set initial PIO mode data
 102  *      @ap: ATA interface
 103  *      @adev: ATA device
 104  *
 105  *      Called to do the PIO mode setup. We use a shared helper for this
 106  *      as the DMA setup must also adjust the PIO timing information.
 107  */
 108
 109 static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev)
 110 {
 111         atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0);
 112 }
 113
 114 /**
 115  *      atiixp_set_dmamode      -       set initial DMA mode data
 116  *      @ap: ATA interface
 117  *      @adev: ATA device
 118  *
 119  *      Called to do the DMA mode setup. We use timing tables for most
 120  *      modes but must tune an appropriate PIO mode to match.
 121  */
 122
 123 static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 124 {
 125         static u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 };
 126
 127         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 128         int dma = adev->dma_mode;
 129         int dn = 2 * ap->port_no + adev->devno;
 130         int wanted_pio;
 131
 132         if (adev->dma_mode >= XFER_UDMA_0) {
 133                 u16 udma_mode_data;
 134
 135                 dma -= XFER_UDMA_0;
 136
 137                 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_MODE, &udma_mode_data);
 138                 udma_mode_data &= ~(0x7 << (4 * dn));
 139                 udma_mode_data |= dma << (4 * dn);
 140                 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_MODE, udma_mode_data);
 141         } else {
 142                 u16 mwdma_timing_data;
 143                 /* Check this is correct - the order is odd in both drivers */
 144                 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
 145
 146                 dma -= XFER_MW_DMA_0;
 147
 148                 pci_read_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, &mwdma_timing_data);
 149                 mwdma_timing_data &= ~(0xFF << timing_shift);
 150                 mwdma_timing_data |= (mwdma_timings[dma] << timing_shift);
 151                 pci_write_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, mwdma_timing_data);
 152         }
 153         /*
 154          *      We must now look at the PIO mode situation. We may need to
 155          *      adjust the PIO mode to keep the timings acceptable
 156          */
 157          if (adev->dma_mode >= XFER_MW_DMA_2)
 158                 wanted_pio = 4;
 159         else if (adev->dma_mode == XFER_MW_DMA_1)
 160                 wanted_pio = 3;
 161         else if (adev->dma_mode == XFER_MW_DMA_0)
 162                 wanted_pio = 0;
 163         else BUG();
 164
 165         if (adev->pio_mode != wanted_pio)
 166                 atiixp_set_pio_timing(ap, adev, wanted_pio);
 167 }
 168
 169 /**
 170  *      atiixp_bmdma_start      -       DMA start callback
 171  *      @qc: Command in progress
 172  *
 173  *      When DMA begins we need to ensure that the UDMA control
 174  *      register for the channel is correctly set.
 175  */
 176
 177 static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
 178 {
 179         struct ata_port *ap = qc->ap;
 180         struct ata_device *adev = qc->dev;
 181
 182         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 183         int dn = (2 * ap->port_no) + adev->devno;
 184         u16 tmp16;
 185
 186         pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 187         if (adev->dma_mode >= XFER_UDMA_0)
 188                 tmp16 |= (1 << dn);
 189         else
 190                 tmp16 &= ~(1 << dn);
 191         pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 192         ata_bmdma_start(qc);
 193 }
 194
 195 /**
 196  *      atiixp_dma_stop -       DMA stop callback
 197  *      @qc: Command in progress
 198  *
 199  *      DMA has completed. Clear the UDMA flag as the next operations will
 200  *      be PIO ones not UDMA data transfer.
 201  */
 202
 203 static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)
 204 {
 205         struct ata_port *ap = qc->ap;
 206         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 207         int dn = (2 * ap->port_no) + qc->dev->devno;
 208         u16 tmp16;
 209
 210         pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 211         tmp16 &= ~(1 << dn);
 212         pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 213         ata_bmdma_stop(qc);
 214 }
 215
 216 static struct scsi_host_template atiixp_sht = {
 217         .module                 = THIS_MODULE,
 218         .name                   = DRV_NAME,
 219         .ioctl                  = ata_scsi_ioctl,
 220         .queuecommand           = ata_scsi_queuecmd,
 221         .can_queue              = ATA_DEF_QUEUE,
 222         .this_id                = ATA_SHT_THIS_ID,
 223         .sg_tablesize           = LIBATA_MAX_PRD,
 224         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 225         .emulated               = ATA_SHT_EMULATED,
 226         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 227         .proc_name              = DRV_NAME,
 228         .dma_boundary           = ATA_DMA_BOUNDARY,
 229         .slave_configure        = ata_scsi_slave_config,
 230         .slave_destroy          = ata_scsi_slave_destroy,
 231         .bios_param             = ata_std_bios_param,
 232 #ifdef CONFIG_PM
 233         .resume                 = ata_scsi_device_resume,
 234         .suspend                = ata_scsi_device_suspend,
 235 #endif
 236 };
 237
 238 static struct ata_port_operations atiixp_port_ops = {
 239         .port_disable   = ata_port_disable,
 240         .set_piomode    = atiixp_set_piomode,
 241         .set_dmamode    = atiixp_set_dmamode,
 242         .mode_filter    = ata_pci_default_filter,
 243         .tf_load        = ata_tf_load,
 244         .tf_read        = ata_tf_read,
 245         .check_status   = ata_check_status,
 246         .exec_command   = ata_exec_command,
 247         .dev_select     = ata_std_dev_select,
 248
 249         .freeze         = ata_bmdma_freeze,
 250         .thaw           = ata_bmdma_thaw,
 251         .error_handler  = atiixp_error_handler,
 252         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 253         .cable_detect   = atiixp_cable_detect,
 254
 255         .bmdma_setup    = ata_bmdma_setup,
 256         .bmdma_start    = atiixp_bmdma_start,
 257         .bmdma_stop     = atiixp_bmdma_stop,
 258         .bmdma_status   = ata_bmdma_status,
 259
 260         .qc_prep        = ata_qc_prep,
 261         .qc_issue       = ata_qc_issue_prot,
 262
 263         .data_xfer      = ata_data_xfer,
 264
 265         .irq_handler    = ata_interrupt,
 266         .irq_clear      = ata_bmdma_irq_clear,
 267         .irq_on         = ata_irq_on,
 268         .irq_ack        = ata_irq_ack,
 269
 270         .port_start     = ata_port_start,
 271 };
 272
 273 static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 274 {
 275         static struct ata_port_info info = {
 276                 .sht = &atiixp_sht,
 277                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 278                 .pio_mask = 0x1f,
 279                 .mwdma_mask = 0x06,     /* No MWDMA0 support */
 280                 .udma_mask = 0x3F,
 281                 .port_ops = &atiixp_port_ops
 282         };
 283         static struct ata_port_info *port_info[2] = { &info, &info };
 284         return ata_pci_init_one(dev, port_info, 2);
 285 }
 286
 287 static const struct pci_device_id atiixp[] = {
 288         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), },
 289         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), },
 290         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), },
 291         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), },
 292
 293         { },
 294 };
 295
 296 static struct pci_driver atiixp_pci_driver = {
 297         .name           = DRV_NAME,
 298         .id_table       = atiixp,
 299         .probe          = atiixp_init_one,
 300         .remove         = ata_pci_remove_one,
 301 #ifdef CONFIG_PM
 302         .resume         = ata_pci_device_resume,
 303         .suspend        = ata_pci_device_suspend,
 304 #endif
 305 };
 306
 307 static int __init atiixp_init(void)
 308 {
 309         return pci_register_driver(&atiixp_pci_driver);
 310 }
 311
 312
 313 static void __exit atiixp_exit(void)
 314 {
 315         pci_unregister_driver(&atiixp_pci_driver);
 316 }
 317
 318 MODULE_AUTHOR("Alan Cox");
 319 MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
 320 MODULE_LICENSE("GPL");
 321 MODULE_DEVICE_TABLE(pci, atiixp);
 322 MODULE_VERSION(DRV_VERSION);
 323
 324 module_init(atiixp_init);
 325 module_exit(atiixp_exit);