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 "0.4.6"
  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_link *link, unsigned long deadline)
  37 {
  38         struct ata_port *ap = link->ap;
  39         static const struct pci_bits atiixp_enable_bits[] = {
  40                 { 0x48, 1, 0x01, 0x00 },
  41                 { 0x48, 1, 0x08, 0x00 }
  42         };
  43         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  44
  45         if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no]))
  46                 return -ENOENT;
  47
  48         return ata_std_prereset(link, deadline);
  49 }
  50
  51 static void atiixp_error_handler(struct ata_port *ap)
  52 {
  53         ata_bmdma_drive_eh(ap, atiixp_pre_reset, ata_std_softreset, NULL,   ata_std_postreset);
  54 }
  55
  56 static int atiixp_cable_detect(struct ata_port *ap)
  57 {
  58         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  59         u8 udma;
  60
  61         /* Hack from drivers/ide/pci. Really we want to know how to do the
  62            raw detection not play follow the bios mode guess */
  63         pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ap->port_no, &udma);
  64         if ((udma & 0x07) >= 0x04 || (udma & 0x70) >= 0x40)
  65                 return  ATA_CBL_PATA80;
  66         return ATA_CBL_PATA40;
  67 }
  68
  69 /**
  70  *      atiixp_set_pio_timing   -       set initial PIO mode data
  71  *      @ap: ATA interface
  72  *      @adev: ATA device
  73  *
  74  *      Called by both the pio and dma setup functions to set the controller
  75  *      timings for PIO transfers. We must load both the mode number and
  76  *      timing values into the controller.
  77  */
  78
  79 static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio)
  80 {
  81         static u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
  82
  83         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  84         int dn = 2 * ap->port_no + adev->devno;
  85
  86         /* Check this is correct - the order is odd in both drivers */
  87         int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
  88         u16 pio_mode_data, pio_timing_data;
  89
  90         pci_read_config_word(pdev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
  91         pio_mode_data &= ~(0x7 << (4 * dn));
  92         pio_mode_data |= pio << (4 * dn);
  93         pci_write_config_word(pdev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
  94
  95         pci_read_config_word(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
  96         pio_mode_data &= ~(0xFF << timing_shift);
  97         pio_mode_data |= (pio_timings[pio] << timing_shift);
  98         pci_write_config_word(pdev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
  99 }
 100
 101 /**
 102  *      atiixp_set_piomode      -       set initial PIO mode data
 103  *      @ap: ATA interface
 104  *      @adev: ATA device
 105  *
 106  *      Called to do the PIO mode setup. We use a shared helper for this
 107  *      as the DMA setup must also adjust the PIO timing information.
 108  */
 109
 110 static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev)
 111 {
 112         atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0);
 113 }
 114
 115 /**
 116  *      atiixp_set_dmamode      -       set initial DMA mode data
 117  *      @ap: ATA interface
 118  *      @adev: ATA device
 119  *
 120  *      Called to do the DMA mode setup. We use timing tables for most
 121  *      modes but must tune an appropriate PIO mode to match.
 122  */
 123
 124 static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 125 {
 126         static u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 };
 127
 128         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 129         int dma = adev->dma_mode;
 130         int dn = 2 * ap->port_no + adev->devno;
 131         int wanted_pio;
 132
 133         if (adev->dma_mode >= XFER_UDMA_0) {
 134                 u16 udma_mode_data;
 135
 136                 dma -= XFER_UDMA_0;
 137
 138                 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_MODE, &udma_mode_data);
 139                 udma_mode_data &= ~(0x7 << (4 * dn));
 140                 udma_mode_data |= dma << (4 * dn);
 141                 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_MODE, udma_mode_data);
 142         } else {
 143                 u16 mwdma_timing_data;
 144                 /* Check this is correct - the order is odd in both drivers */
 145                 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
 146
 147                 dma -= XFER_MW_DMA_0;
 148
 149                 pci_read_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, &mwdma_timing_data);
 150                 mwdma_timing_data &= ~(0xFF << timing_shift);
 151                 mwdma_timing_data |= (mwdma_timings[dma] << timing_shift);
 152                 pci_write_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, mwdma_timing_data);
 153         }
 154         /*
 155          *      We must now look at the PIO mode situation. We may need to
 156          *      adjust the PIO mode to keep the timings acceptable
 157          */
 158          if (adev->dma_mode >= XFER_MW_DMA_2)
 159                 wanted_pio = 4;
 160         else if (adev->dma_mode == XFER_MW_DMA_1)
 161                 wanted_pio = 3;
 162         else if (adev->dma_mode == XFER_MW_DMA_0)
 163                 wanted_pio = 0;
 164         else BUG();
 165
 166         if (adev->pio_mode != wanted_pio)
 167                 atiixp_set_pio_timing(ap, adev, wanted_pio);
 168 }
 169
 170 /**
 171  *      atiixp_bmdma_start      -       DMA start callback
 172  *      @qc: Command in progress
 173  *
 174  *      When DMA begins we need to ensure that the UDMA control
 175  *      register for the channel is correctly set.
 176  *
 177  *      Note: The host lock held by the libata layer protects
 178  *      us from two channels both trying to set DMA bits at once
 179  */
 180
 181 static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
 182 {
 183         struct ata_port *ap = qc->ap;
 184         struct ata_device *adev = qc->dev;
 185
 186         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 187         int dn = (2 * ap->port_no) + adev->devno;
 188         u16 tmp16;
 189
 190         pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 191         if (adev->dma_mode >= XFER_UDMA_0)
 192                 tmp16 |= (1 << dn);
 193         else
 194                 tmp16 &= ~(1 << dn);
 195         pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 196         ata_bmdma_start(qc);
 197 }
 198
 199 /**
 200  *      atiixp_dma_stop -       DMA stop callback
 201  *      @qc: Command in progress
 202  *
 203  *      DMA has completed. Clear the UDMA flag as the next operations will
 204  *      be PIO ones not UDMA data transfer.
 205  *
 206  *      Note: The host lock held by the libata layer protects
 207  *      us from two channels both trying to set DMA bits at once
 208  */
 209
 210 static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)
 211 {
 212         struct ata_port *ap = qc->ap;
 213         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 214         int dn = (2 * ap->port_no) + qc->dev->devno;
 215         u16 tmp16;
 216
 217         pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 218         tmp16 &= ~(1 << dn);
 219         pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 220         ata_bmdma_stop(qc);
 221 }
 222
 223 static struct scsi_host_template atiixp_sht = {
 224         .module                 = THIS_MODULE,
 225         .name                   = DRV_NAME,
 226         .ioctl                  = ata_scsi_ioctl,
 227         .queuecommand           = ata_scsi_queuecmd,
 228         .can_queue              = ATA_DEF_QUEUE,
 229         .this_id                = ATA_SHT_THIS_ID,
 230         .sg_tablesize           = LIBATA_DUMB_MAX_PRD,
 231         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 232         .emulated               = ATA_SHT_EMULATED,
 233         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 234         .proc_name              = DRV_NAME,
 235         .dma_boundary           = ATA_DMA_BOUNDARY,
 236         .slave_configure        = ata_scsi_slave_config,
 237         .slave_destroy          = ata_scsi_slave_destroy,
 238         .bios_param             = ata_std_bios_param,
 239 };
 240
 241 static struct ata_port_operations atiixp_port_ops = {
 242         .set_piomode    = atiixp_set_piomode,
 243         .set_dmamode    = atiixp_set_dmamode,
 244         .mode_filter    = ata_pci_default_filter,
 245         .tf_load        = ata_tf_load,
 246         .tf_read        = ata_tf_read,
 247         .check_status   = ata_check_status,
 248         .exec_command   = ata_exec_command,
 249         .dev_select     = ata_std_dev_select,
 250
 251         .freeze         = ata_bmdma_freeze,
 252         .thaw           = ata_bmdma_thaw,
 253         .error_handler  = atiixp_error_handler,
 254         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 255         .cable_detect   = atiixp_cable_detect,
 256
 257         .bmdma_setup    = ata_bmdma_setup,
 258         .bmdma_start    = atiixp_bmdma_start,
 259         .bmdma_stop     = atiixp_bmdma_stop,
 260         .bmdma_status   = ata_bmdma_status,
 261
 262         .qc_prep        = ata_dumb_qc_prep,
 263         .qc_issue       = ata_qc_issue_prot,
 264
 265         .data_xfer      = ata_data_xfer,
 266
 267         .irq_handler    = ata_interrupt,
 268         .irq_clear      = ata_bmdma_irq_clear,
 269         .irq_on         = ata_irq_on,
 270
 271         .port_start     = ata_sff_port_start,
 272 };
 273
 274 static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 275 {
 276         static const struct ata_port_info info = {
 277                 .sht = &atiixp_sht,
 278                 .flags = ATA_FLAG_SLAVE_POSS,
 279                 .pio_mask = 0x1f,
 280                 .mwdma_mask = 0x06,     /* No MWDMA0 support */
 281                 .udma_mask = 0x3F,
 282                 .port_ops = &atiixp_port_ops
 283         };
 284         const struct ata_port_info *ppi[] = { &info, NULL };
 285         return ata_pci_init_one(dev, ppi);
 286 }
 287
 288 static const struct pci_device_id atiixp[] = {
 289         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), },
 290         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), },
 291         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), },
 292         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), },
 293         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), },
 294
 295         { },
 296 };
 297
 298 static struct pci_driver atiixp_pci_driver = {
 299         .name           = DRV_NAME,
 300         .id_table       = atiixp,
 301         .probe          = atiixp_init_one,
 302         .remove         = ata_pci_remove_one,
 303 #ifdef CONFIG_PM
 304         .resume         = ata_pci_device_resume,
 305         .suspend        = ata_pci_device_suspend,
 306 #endif
 307 };
 308
 309 static int __init atiixp_init(void)
 310 {
 311         return pci_register_driver(&atiixp_pci_driver);
 312 }
 313
 314
 315 static void __exit atiixp_exit(void)
 316 {
 317         pci_unregister_driver(&atiixp_pci_driver);
 318 }
 319
 320 MODULE_AUTHOR("Alan Cox");
 321 MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
 322 MODULE_LICENSE("GPL");
 323 MODULE_DEVICE_TABLE(pci, atiixp);
 324 MODULE_VERSION(DRV_VERSION);
 325
 326 module_init(atiixp_init);
 327 module_exit(atiixp_exit);