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); 187