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0008 #include <linux/kernel.h>
0009 #include <linux/module.h>
0010 #include <linux/pci.h>
0011 #include <linux/blkdev.h>
0012 #include <linux/delay.h>
0013 #include <linux/device.h>
0014 #include <linux/gfp.h>
0015 #include <linux/acpi.h>
0016 #include <linux/libata.h>
0017 #include <linux/ata.h>
0018 #include <scsi/scsi_host.h>
0019
0020 #define DRV_NAME "pata_acpi"
0021 #define DRV_VERSION "0.2.3"
0022
0023 struct pata_acpi {
0024 struct ata_acpi_gtm gtm;
0025 void *last;
0026 unsigned long mask[2];
0027 };
0028
0029
0030
0031
0032
0033
0034
0035
0036
0037 static int pacpi_pre_reset(struct ata_link *link, unsigned long deadline)
0038 {
0039 struct ata_port *ap = link->ap;
0040 struct pata_acpi *acpi = ap->private_data;
0041 if (ACPI_HANDLE(&ap->tdev) == NULL || ata_acpi_gtm(ap, &acpi->gtm) < 0)
0042 return -ENODEV;
0043
0044 return ata_sff_prereset(link, deadline);
0045 }
0046
0047
0048
0049
0050
0051
0052
0053
0054 static int pacpi_cable_detect(struct ata_port *ap)
0055 {
0056 struct pata_acpi *acpi = ap->private_data;
0057
0058 if ((acpi->mask[0] | acpi->mask[1]) & (0xF8 << ATA_SHIFT_UDMA))
0059 return ATA_CBL_PATA80;
0060 else
0061 return ATA_CBL_PATA40;
0062 }
0063
0064
0065
0066
0067
0068
0069
0070
0071
0072
0073 static unsigned long pacpi_discover_modes(struct ata_port *ap, struct ata_device *adev)
0074 {
0075 struct pata_acpi *acpi = ap->private_data;
0076 struct ata_acpi_gtm probe;
0077 unsigned int xfer_mask;
0078
0079 probe = acpi->gtm;
0080
0081 ata_acpi_gtm(ap, &probe);
0082
0083 xfer_mask = ata_acpi_gtm_xfermask(adev, &probe);
0084
0085 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
0086 ap->cbl = ATA_CBL_PATA80;
0087
0088 return xfer_mask;
0089 }
0090
0091
0092
0093
0094
0095
0096
0097
0098
0099
0100 static unsigned int pacpi_mode_filter(struct ata_device *adev, unsigned int mask)
0101 {
0102 struct pata_acpi *acpi = adev->link->ap->private_data;
0103 return mask & acpi->mask[adev->devno];
0104 }
0105
0106
0107
0108
0109
0110
0111
0112 static void pacpi_set_piomode(struct ata_port *ap, struct ata_device *adev)
0113 {
0114 int unit = adev->devno;
0115 struct pata_acpi *acpi = ap->private_data;
0116 const struct ata_timing *t;
0117
0118 if (!(acpi->gtm.flags & 0x10))
0119 unit = 0;
0120
0121
0122 t = ata_timing_find_mode(adev->pio_mode);
0123 acpi->gtm.drive[unit].pio = t->cycle;
0124 ata_acpi_stm(ap, &acpi->gtm);
0125
0126 ata_acpi_gtm(ap, &acpi->gtm);
0127 }
0128
0129
0130
0131
0132
0133
0134
0135 static void pacpi_set_dmamode(struct ata_port *ap, struct ata_device *adev)
0136 {
0137 int unit = adev->devno;
0138 struct pata_acpi *acpi = ap->private_data;
0139 const struct ata_timing *t;
0140
0141 if (!(acpi->gtm.flags & 0x10))
0142 unit = 0;
0143
0144
0145 t = ata_timing_find_mode(adev->dma_mode);
0146 if (adev->dma_mode >= XFER_UDMA_0) {
0147 acpi->gtm.drive[unit].dma = t->udma;
0148 acpi->gtm.flags |= (1 << (2 * unit));
0149 } else {
0150 acpi->gtm.drive[unit].dma = t->cycle;
0151 acpi->gtm.flags &= ~(1 << (2 * unit));
0152 }
0153 ata_acpi_stm(ap, &acpi->gtm);
0154
0155 ata_acpi_gtm(ap, &acpi->gtm);
0156 }
0157
0158
0159
0160
0161
0162
0163
0164
0165
0166
0167 static unsigned int pacpi_qc_issue(struct ata_queued_cmd *qc)
0168 {
0169 struct ata_port *ap = qc->ap;
0170 struct ata_device *adev = qc->dev;
0171 struct pata_acpi *acpi = ap->private_data;
0172
0173 if (acpi->gtm.flags & 0x10)
0174 return ata_bmdma_qc_issue(qc);
0175
0176 if (adev != acpi->last) {
0177 pacpi_set_piomode(ap, adev);
0178 if (ata_dma_enabled(adev))
0179 pacpi_set_dmamode(ap, adev);
0180 acpi->last = adev;
0181 }
0182 return ata_bmdma_qc_issue(qc);
0183 }
0184
0185
0186
0187
0188
0189
0190
0191
0192 static int pacpi_port_start(struct ata_port *ap)
0193 {
0194 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
0195 struct pata_acpi *acpi;
0196
0197 if (ACPI_HANDLE(&ap->tdev) == NULL)
0198 return -ENODEV;
0199
0200 acpi = ap->private_data = devm_kzalloc(&pdev->dev, sizeof(struct pata_acpi), GFP_KERNEL);
0201 if (ap->private_data == NULL)
0202 return -ENOMEM;
0203 acpi->mask[0] = pacpi_discover_modes(ap, &ap->link.device[0]);
0204 acpi->mask[1] = pacpi_discover_modes(ap, &ap->link.device[1]);
0205 return ata_bmdma_port_start(ap);
0206 }
0207
0208 static struct scsi_host_template pacpi_sht = {
0209 ATA_BMDMA_SHT(DRV_NAME),
0210 };
0211
0212 static struct ata_port_operations pacpi_ops = {
0213 .inherits = &ata_bmdma_port_ops,
0214 .qc_issue = pacpi_qc_issue,
0215 .cable_detect = pacpi_cable_detect,
0216 .mode_filter = pacpi_mode_filter,
0217 .set_piomode = pacpi_set_piomode,
0218 .set_dmamode = pacpi_set_dmamode,
0219 .prereset = pacpi_pre_reset,
0220 .port_start = pacpi_port_start,
0221 };
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0237
0238 static int pacpi_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
0239 {
0240 static const struct ata_port_info info = {
0241 .flags = ATA_FLAG_SLAVE_POSS,
0242
0243 .pio_mask = ATA_PIO4,
0244 .mwdma_mask = ATA_MWDMA2,
0245 .udma_mask = ATA_UDMA6,
0246
0247 .port_ops = &pacpi_ops,
0248 };
0249 const struct ata_port_info *ppi[] = { &info, NULL };
0250 if (pdev->vendor == PCI_VENDOR_ID_ATI) {
0251 int rc = pcim_enable_device(pdev);
0252 if (rc < 0)
0253 return rc;
0254 pcim_pin_device(pdev);
0255 }
0256 return ata_pci_bmdma_init_one(pdev, ppi, &pacpi_sht, NULL, 0);
0257 }
0258
0259 static const struct pci_device_id pacpi_pci_tbl[] = {
0260 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1},
0261 { }
0262 };
0263
0264 static struct pci_driver pacpi_pci_driver = {
0265 .name = DRV_NAME,
0266 .id_table = pacpi_pci_tbl,
0267 .probe = pacpi_init_one,
0268 .remove = ata_pci_remove_one,
0269 #ifdef CONFIG_PM_SLEEP
0270 .suspend = ata_pci_device_suspend,
0271 .resume = ata_pci_device_resume,
0272 #endif
0273 };
0274
0275 module_pci_driver(pacpi_pci_driver);
0276
0277 MODULE_AUTHOR("Alan Cox");
0278 MODULE_DESCRIPTION("SCSI low-level driver for ATA in ACPI mode");
0279 MODULE_LICENSE("GPL");
0280 MODULE_DEVICE_TABLE(pci, pacpi_pci_tbl);
0281 MODULE_VERSION(DRV_VERSION);