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 "0.4.4"
  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         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  39         static const struct pci_bits atiixp_enable_bits[] = {
  40                 { 0x48, 1, 0x01, 0x00 },
  41                 { 0x48, 1, 0x08, 0x00 }
  42         };
  43         u8 udma;
  44
  45         if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no]))
  46                 return -ENOENT;
  47
  48         /* Hack from drivers/ide/pci. Really we want to know how to do the
  49            raw detection not play follow the bios mode guess */
  50         pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ap->port_no, &udma);
  51         if ((udma & 0x07) >= 0x04 || (udma & 0x70) >= 0x40)
  52                 ap->cbl = ATA_CBL_PATA80;
  53         else
  54                 ap->cbl = ATA_CBL_PATA40;
  55         return ata_std_prereset(ap);
  56 }
  57
  58 static void atiixp_error_handler(struct ata_port *ap)
  59 {
  60         ata_bmdma_drive_eh(ap, atiixp_pre_reset, ata_std_softreset, NULL,   ata_std_postreset);
  61 }
  62
  63 /**
  64  *      atiixp_set_pio_timing   -       set initial PIO mode data
  65  *      @ap: ATA interface
  66  *      @adev: ATA device
  67  *
  68  *      Called by both the pio and dma setup functions to set the controller
  69  *      timings for PIO transfers. We must load both the mode number and
  70  *      timing values into the controller.
  71  */
  72
  73 static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio)
  74 {
  75         static u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
  76
  77         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
  78         int dn = 2 * ap->port_no + adev->devno;
  79
  80         /* Check this is correct - the order is odd in both drivers */
  81         int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
  82         u16 pio_mode_data, pio_timing_data;
  83
  84         pci_read_config_word(pdev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
  85         pio_mode_data &= ~(0x7 << (4 * dn));
  86         pio_mode_data |= pio << (4 * dn);
  87         pci_write_config_word(pdev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
  88
  89         pci_read_config_word(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
  90         pio_mode_data &= ~(0xFF << timing_shift);
  91         pio_mode_data |= (pio_timings[pio] << timing_shift);
  92         pci_write_config_word(pdev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
  93 }
  94
  95 /**
  96  *      atiixp_set_piomode      -       set initial PIO mode data
  97  *      @ap: ATA interface
  98  *      @adev: ATA device
  99  *
 100  *      Called to do the PIO mode setup. We use a shared helper for this
 101  *      as the DMA setup must also adjust the PIO timing information.
 102  */
 103
 104 static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev)
 105 {
 106         atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0);
 107 }
 108
 109 /**
 110  *      atiixp_set_dmamode      -       set initial DMA mode data
 111  *      @ap: ATA interface
 112  *      @adev: ATA device
 113  *
 114  *      Called to do the DMA mode setup. We use timing tables for most
 115  *      modes but must tune an appropriate PIO mode to match.
 116  */
 117
 118 static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 119 {
 120         static u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 };
 121
 122         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 123         int dma = adev->dma_mode;
 124         int dn = 2 * ap->port_no + adev->devno;
 125         int wanted_pio;
 126
 127         if (adev->dma_mode >= XFER_UDMA_0) {
 128                 u16 udma_mode_data;
 129
 130                 dma -= XFER_UDMA_0;
 131
 132                 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_MODE, &udma_mode_data);
 133                 udma_mode_data &= ~(0x7 << (4 * dn));
 134                 udma_mode_data |= dma << (4 * dn);
 135                 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_MODE, udma_mode_data);
 136         } else {
 137                 u16 mwdma_timing_data;
 138                 /* Check this is correct - the order is odd in both drivers */
 139                 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
 140
 141                 dma -= XFER_MW_DMA_0;
 142
 143                 pci_read_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, &mwdma_timing_data);
 144                 mwdma_timing_data &= ~(0xFF << timing_shift);
 145                 mwdma_timing_data |= (mwdma_timings[dma] << timing_shift);
 146                 pci_write_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, mwdma_timing_data);
 147         }
 148         /*
 149          *      We must now look at the PIO mode situation. We may need to
 150          *      adjust the PIO mode to keep the timings acceptable
 151          */
 152          if (adev->dma_mode >= XFER_MW_DMA_2)
 153                 wanted_pio = 4;
 154         else if (adev->dma_mode == XFER_MW_DMA_1)
 155                 wanted_pio = 3;
 156         else if (adev->dma_mode == XFER_MW_DMA_0)
 157                 wanted_pio = 0;
 158         else BUG();
 159
 160         if (adev->pio_mode != wanted_pio)
 161                 atiixp_set_pio_timing(ap, adev, wanted_pio);
 162 }
 163
 164 /**
 165  *      atiixp_bmdma_start      -       DMA start callback
 166  *      @qc: Command in progress
 167  *
 168  *      When DMA begins we need to ensure that the UDMA control
 169  *      register for the channel is correctly set.
 170  */
 171
 172 static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
 173 {
 174         struct ata_port *ap = qc->ap;
 175         struct ata_device *adev = qc->dev;
 176
 177         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 178         int dn = (2 * ap->port_no) + adev->devno;
 179         u16 tmp16;
 180
 181         pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 182         if (adev->dma_mode >= XFER_UDMA_0)
 183                 tmp16 |= (1 << dn);
 184         else
 185                 tmp16 &= ~(1 << dn);
 186         pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 187         ata_bmdma_start(qc);
 188 }
 189
 190 /**
 191  *      atiixp_dma_stop -       DMA stop callback
 192  *      @qc: Command in progress
 193  *
 194  *      DMA has completed. Clear the UDMA flag as the next operations will
 195  *      be PIO ones not UDMA data transfer.
 196  */
 197
 198 static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)
 199 {
 200         struct ata_port *ap = qc->ap;
 201         struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 202         int dn = (2 * ap->port_no) + qc->dev->devno;
 203         u16 tmp16;
 204
 205         pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
 206         tmp16 &= ~(1 << dn);
 207         pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
 208         ata_bmdma_stop(qc);
 209 }
 210
 211 static struct scsi_host_template atiixp_sht = {
 212         .module                 = THIS_MODULE,
 213         .name                   = DRV_NAME,
 214         .ioctl                  = ata_scsi_ioctl,
 215         .queuecommand           = ata_scsi_queuecmd,
 216         .can_queue              = ATA_DEF_QUEUE,
 217         .this_id                = ATA_SHT_THIS_ID,
 218         .sg_tablesize           = LIBATA_MAX_PRD,
 219         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
 220         .emulated               = ATA_SHT_EMULATED,
 221         .use_clustering         = ATA_SHT_USE_CLUSTERING,
 222         .proc_name              = DRV_NAME,
 223         .dma_boundary           = ATA_DMA_BOUNDARY,
 224         .slave_configure        = ata_scsi_slave_config,
 225         .slave_destroy          = ata_scsi_slave_destroy,
 226         .bios_param             = ata_std_bios_param,
 227 #ifdef CONFIG_PM
 228         .resume                 = ata_scsi_device_resume,
 229         .suspend                = ata_scsi_device_suspend,
 230 #endif
 231 };
 232
 233 static struct ata_port_operations atiixp_port_ops = {
 234         .port_disable   = ata_port_disable,
 235         .set_piomode    = atiixp_set_piomode,
 236         .set_dmamode    = atiixp_set_dmamode,
 237         .mode_filter    = ata_pci_default_filter,
 238         .tf_load        = ata_tf_load,
 239         .tf_read        = ata_tf_read,
 240         .check_status   = ata_check_status,
 241         .exec_command   = ata_exec_command,
 242         .dev_select     = ata_std_dev_select,
 243
 244         .freeze         = ata_bmdma_freeze,
 245         .thaw           = ata_bmdma_thaw,
 246         .error_handler  = atiixp_error_handler,
 247         .post_internal_cmd = ata_bmdma_post_internal_cmd,
 248
 249         .bmdma_setup    = ata_bmdma_setup,
 250         .bmdma_start    = atiixp_bmdma_start,
 251         .bmdma_stop     = atiixp_bmdma_stop,
 252         .bmdma_status   = ata_bmdma_status,
 253
 254         .qc_prep        = ata_qc_prep,
 255         .qc_issue       = ata_qc_issue_prot,
 256
 257         .data_xfer      = ata_data_xfer,
 258
 259         .irq_handler    = ata_interrupt,
 260         .irq_clear      = ata_bmdma_irq_clear,
 261         .irq_on         = ata_irq_on,
 262         .irq_ack        = ata_irq_ack,
 263
 264         .port_start     = ata_port_start,
 265 };
 266
 267 static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 268 {
 269         static struct ata_port_info info = {
 270                 .sht = &atiixp_sht,
 271                 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 272                 .pio_mask = 0x1f,
 273                 .mwdma_mask = 0x06,     /* No MWDMA0 support */
 274                 .udma_mask = 0x3F,
 275                 .port_ops = &atiixp_port_ops
 276         };
 277         static struct ata_port_info *port_info[2] = { &info, &info };
 278         return ata_pci_init_one(dev, port_info, 2);
 279 }
 280
 281 static const struct pci_device_id atiixp[] = {
 282         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), },
 283         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), },
 284         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), },
 285         { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), },
 286
 287         { },
 288 };
 289
 290 static struct pci_driver atiixp_pci_driver = {
 291         .name           = DRV_NAME,
 292         .id_table       = atiixp,
 293         .probe          = atiixp_init_one,
 294         .remove         = ata_pci_remove_one,
 295 #ifdef CONFIG_PM
 296         .resume         = ata_pci_device_resume,
 297         .suspend        = ata_pci_device_suspend,
 298 #endif
 299 };
 300
 301 static int __init atiixp_init(void)
 302 {
 303         return pci_register_driver(&atiixp_pci_driver);
 304 }
 305
 306
 307 static void __exit atiixp_exit(void)
 308 {
 309         pci_unregister_driver(&atiixp_pci_driver);
 310 }
 311
 312 MODULE_AUTHOR("Alan Cox");
 313 MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
 314 MODULE_LICENSE("GPL");
 315 MODULE_DEVICE_TABLE(pci, atiixp);
 316 MODULE_VERSION(DRV_VERSION);
 317
 318 module_init(atiixp_init);
 319 module_exit(atiixp_exit);