| 1 | /* |
| 2 | * Marvell PATA driver. |
| 3 | * |
| 4 | * For the moment we drive the PATA port in legacy mode. That |
| 5 | * isn't making full use of the device functionality but it is |
| 6 | * easy to get working. |
| 7 | * |
| 8 | * (c) 2006 Red Hat |
| 9 | */ |
| 10 | |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/pci.h> |
| 14 | #include <linux/blkdev.h> |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/device.h> |
| 17 | #include <scsi/scsi_host.h> |
| 18 | #include <linux/libata.h> |
| 19 | #include <linux/ata.h> |
| 20 | |
| 21 | #define DRV_NAME "pata_marvell" |
| 22 | #define DRV_VERSION "0.1.6" |
| 23 | |
| 24 | /** |
| 25 | * marvell_pata_active - check if PATA is active |
| 26 | * @pdev: PCI device |
| 27 | * |
| 28 | * Returns 1 if the PATA port may be active. We know how to check this |
| 29 | * for the 6145 but not the other devices |
| 30 | */ |
| 31 | |
| 32 | static int marvell_pata_active(struct pci_dev *pdev) |
| 33 | { |
| 34 | int i; |
| 35 | u32 devices; |
| 36 | void __iomem *barp; |
| 37 | |
| 38 | /* We don't yet know how to do this for other devices */ |
| 39 | if (pdev->device != 0x6145) |
| 40 | return 1; |
| 41 | |
| 42 | barp = pci_iomap(pdev, 5, 0x10); |
| 43 | if (barp == NULL) |
| 44 | return -ENOMEM; |
| 45 | |
| 46 | printk("BAR5:"); |
| 47 | for(i = 0; i <= 0x0F; i++) |
| 48 | printk("%02X:%02X ", i, ioread8(barp + i)); |
| 49 | printk("\n"); |
| 50 | |
| 51 | devices = ioread32(barp + 0x0C); |
| 52 | pci_iounmap(pdev, barp); |
| 53 | |
| 54 | if (devices & 0x10) |
| 55 | return 1; |
| 56 | return 0; |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * marvell_pre_reset - probe begin |
| 61 | * @link: link |
| 62 | * @deadline: deadline jiffies for the operation |
| 63 | * |
| 64 | * Perform the PATA port setup we need. |
| 65 | */ |
| 66 | |
| 67 | static int marvell_pre_reset(struct ata_link *link, unsigned long deadline) |
| 68 | { |
| 69 | struct ata_port *ap = link->ap; |
| 70 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
| 71 | |
| 72 | if (pdev->device == 0x6145 && ap->port_no == 0 && |
| 73 | !marvell_pata_active(pdev)) /* PATA enable ? */ |
| 74 | return -ENOENT; |
| 75 | |
| 76 | return ata_sff_prereset(link, deadline); |
| 77 | } |
| 78 | |
| 79 | static int marvell_cable_detect(struct ata_port *ap) |
| 80 | { |
| 81 | /* Cable type */ |
| 82 | switch(ap->port_no) |
| 83 | { |
| 84 | case 0: |
| 85 | if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1) |
| 86 | return ATA_CBL_PATA40; |
| 87 | return ATA_CBL_PATA80; |
| 88 | case 1: /* Legacy SATA port */ |
| 89 | return ATA_CBL_SATA; |
| 90 | } |
| 91 | |
| 92 | BUG(); |
| 93 | return 0; /* Our BUG macro needs the right markup */ |
| 94 | } |
| 95 | |
| 96 | /* No PIO or DMA methods needed for this device */ |
| 97 | |
| 98 | static struct scsi_host_template marvell_sht = { |
| 99 | ATA_BMDMA_SHT(DRV_NAME), |
| 100 | }; |
| 101 | |
| 102 | static struct ata_port_operations marvell_ops = { |
| 103 | .inherits = &ata_bmdma_port_ops, |
| 104 | .cable_detect = marvell_cable_detect, |
| 105 | .prereset = marvell_pre_reset, |
| 106 | }; |
| 107 | |
| 108 | |
| 109 | /** |
| 110 | * marvell_init_one - Register Marvell ATA PCI device with kernel services |
| 111 | * @pdev: PCI device to register |
| 112 | * @ent: Entry in marvell_pci_tbl matching with @pdev |
| 113 | * |
| 114 | * Called from kernel PCI layer. |
| 115 | * |
| 116 | * LOCKING: |
| 117 | * Inherited from PCI layer (may sleep). |
| 118 | * |
| 119 | * RETURNS: |
| 120 | * Zero on success, or -ERRNO value. |
| 121 | */ |
| 122 | |
| 123 | static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id) |
| 124 | { |
| 125 | static const struct ata_port_info info = { |
| 126 | .flags = ATA_FLAG_SLAVE_POSS, |
| 127 | |
| 128 | .pio_mask = ATA_PIO4, |
| 129 | .mwdma_mask = ATA_MWDMA2, |
| 130 | .udma_mask = ATA_UDMA5, |
| 131 | |
| 132 | .port_ops = &marvell_ops, |
| 133 | }; |
| 134 | static const struct ata_port_info info_sata = { |
| 135 | /* Slave possible as its magically mapped not real */ |
| 136 | .flags = ATA_FLAG_SLAVE_POSS, |
| 137 | |
| 138 | .pio_mask = ATA_PIO4, |
| 139 | .mwdma_mask = ATA_MWDMA2, |
| 140 | .udma_mask = ATA_UDMA6, |
| 141 | |
| 142 | .port_ops = &marvell_ops, |
| 143 | }; |
| 144 | const struct ata_port_info *ppi[] = { &info, &info_sata }; |
| 145 | |
| 146 | if (pdev->device == 0x6101) |
| 147 | ppi[1] = &ata_dummy_port_info; |
| 148 | |
| 149 | #if IS_ENABLED(CONFIG_SATA_AHCI) |
| 150 | if (!marvell_pata_active(pdev)) { |
| 151 | printk(KERN_INFO DRV_NAME ": PATA port not active, deferring to AHCI driver.\n"); |
| 152 | return -ENODEV; |
| 153 | } |
| 154 | #endif |
| 155 | return ata_pci_bmdma_init_one(pdev, ppi, &marvell_sht, NULL, 0); |
| 156 | } |
| 157 | |
| 158 | static const struct pci_device_id marvell_pci_tbl[] = { |
| 159 | { PCI_DEVICE(0x11AB, 0x6101), }, |
| 160 | { PCI_DEVICE(0x11AB, 0x6121), }, |
| 161 | { PCI_DEVICE(0x11AB, 0x6123), }, |
| 162 | { PCI_DEVICE(0x11AB, 0x6145), }, |
| 163 | { PCI_DEVICE(0x1B4B, 0x91A0), }, |
| 164 | { PCI_DEVICE(0x1B4B, 0x91A4), }, |
| 165 | |
| 166 | { } /* terminate list */ |
| 167 | }; |
| 168 | |
| 169 | static struct pci_driver marvell_pci_driver = { |
| 170 | .name = DRV_NAME, |
| 171 | .id_table = marvell_pci_tbl, |
| 172 | .probe = marvell_init_one, |
| 173 | .remove = ata_pci_remove_one, |
| 174 | #ifdef CONFIG_PM_SLEEP |
| 175 | .suspend = ata_pci_device_suspend, |
| 176 | .resume = ata_pci_device_resume, |
| 177 | #endif |
| 178 | }; |
| 179 | |
| 180 | module_pci_driver(marvell_pci_driver); |
| 181 | |
| 182 | MODULE_AUTHOR("Alan Cox"); |
| 183 | MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode"); |
| 184 | MODULE_LICENSE("GPL"); |
| 185 | MODULE_DEVICE_TABLE(pci, marvell_pci_tbl); |
| 186 | MODULE_VERSION(DRV_VERSION); |