1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Marvell PATA driver. 4 * 5 * For the moment we drive the PATA port in legacy mode. That 6 * isn't making full use of the device functionality but it is 7 * easy to get working. 8 * 9 * (c) 2006 Red Hat 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/module.h> 14 #include <linux/pci.h> 15 #include <linux/blkdev.h> 16 #include <linux/delay.h> 17 #include <linux/device.h> 18 #include <scsi/scsi_host.h> 19 #include <linux/libata.h> 20 #include <linux/ata.h> 21 22 #define DRV_NAME "pata_marvell" 23 #define DRV_VERSION "0.1.6" 24 25 /** 26 * marvell_pata_active - check if PATA is active 27 * @pdev: PCI device 28 * 29 * Returns 1 if the PATA port may be active. We know how to check this 30 * for the 6145 but not the other devices 31 */ 32 33 static int marvell_pata_active(struct pci_dev *pdev) 34 { 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 devices = ioread32(barp + 0x0C); 47 pci_iounmap(pdev, barp); 48 49 if (devices & 0x10) 50 return 1; 51 return 0; 52 } 53 54 /** 55 * marvell_pre_reset - probe begin 56 * @link: link 57 * @deadline: deadline jiffies for the operation 58 * 59 * Perform the PATA port setup we need. 60 */ 61 62 static int marvell_pre_reset(struct ata_link *link, unsigned long deadline) 63 { 64 struct ata_port *ap = link->ap; 65 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 66 67 if (pdev->device == 0x6145 && ap->port_no == 0 && 68 !marvell_pata_active(pdev)) /* PATA enable ? */ 69 return -ENOENT; 70 71 return ata_sff_prereset(link, deadline); 72 } 73 74 static int marvell_cable_detect(struct ata_port *ap) 75 { 76 /* Cable type */ 77 switch(ap->port_no) 78 { 79 case 0: 80 if (!ap->ioaddr.bmdma_addr) 81 return ATA_CBL_PATA_UNK; 82 if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1) 83 return ATA_CBL_PATA40; 84 return ATA_CBL_PATA80; 85 case 1: /* Legacy SATA port */ 86 return ATA_CBL_SATA; 87 } 88 89 BUG(); 90 return 0; /* Our BUG macro needs the right markup */ 91 } 92 93 /* No PIO or DMA methods needed for this device */ 94 95 static struct scsi_host_template marvell_sht = { 96 ATA_BMDMA_SHT(DRV_NAME), 97 }; 98 99 static struct ata_port_operations marvell_ops = { 100 .inherits = &ata_bmdma_port_ops, 101 .cable_detect = marvell_cable_detect, 102 .prereset = marvell_pre_reset, 103 }; 104 105 106 /** 107 * marvell_init_one - Register Marvell ATA PCI device with kernel services 108 * @pdev: PCI device to register 109 * @id: PCI device ID 110 * 111 * Called from kernel PCI layer. 112 * 113 * LOCKING: 114 * Inherited from PCI layer (may sleep). 115 * 116 * RETURNS: 117 * Zero on success, or -ERRNO value. 118 */ 119 120 static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id) 121 { 122 static const struct ata_port_info info = { 123 .flags = ATA_FLAG_SLAVE_POSS, 124 125 .pio_mask = ATA_PIO4, 126 .mwdma_mask = ATA_MWDMA2, 127 .udma_mask = ATA_UDMA5, 128 129 .port_ops = &marvell_ops, 130 }; 131 static const struct ata_port_info info_sata = { 132 /* Slave possible as its magically mapped not real */ 133 .flags = ATA_FLAG_SLAVE_POSS, 134 135 .pio_mask = ATA_PIO4, 136 .mwdma_mask = ATA_MWDMA2, 137 .udma_mask = ATA_UDMA6, 138 139 .port_ops = &marvell_ops, 140 }; 141 const struct ata_port_info *ppi[] = { &info, &info_sata }; 142 143 if (pdev->device == 0x6101) 144 ppi[1] = &ata_dummy_port_info; 145 146 #if IS_ENABLED(CONFIG_SATA_AHCI) 147 if (!marvell_pata_active(pdev)) { 148 dev_info(&pdev->dev, 149 "PATA port not active, deferring to AHCI driver.\n"); 150 return -ENODEV; 151 } 152 #endif 153 return ata_pci_bmdma_init_one(pdev, ppi, &marvell_sht, NULL, 0); 154 } 155 156 static const struct pci_device_id marvell_pci_tbl[] = { 157 { PCI_DEVICE(0x11AB, 0x6101), }, 158 { PCI_DEVICE(0x11AB, 0x6121), }, 159 { PCI_DEVICE(0x11AB, 0x6123), }, 160 { PCI_DEVICE(0x11AB, 0x6145), }, 161 { PCI_DEVICE(0x1B4B, 0x91A0), }, 162 { PCI_DEVICE(0x1B4B, 0x91A4), }, 163 164 { } /* terminate list */ 165 }; 166 167 static struct pci_driver marvell_pci_driver = { 168 .name = DRV_NAME, 169 .id_table = marvell_pci_tbl, 170 .probe = marvell_init_one, 171 .remove = ata_pci_remove_one, 172 #ifdef CONFIG_PM_SLEEP 173 .suspend = ata_pci_device_suspend, 174 .resume = ata_pci_device_resume, 175 #endif 176 }; 177 178 module_pci_driver(marvell_pci_driver); 179 180 MODULE_AUTHOR("Alan Cox"); 181 MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode"); 182 MODULE_LICENSE("GPL"); 183 MODULE_DEVICE_TABLE(pci, marvell_pci_tbl); 184 MODULE_VERSION(DRV_VERSION); 185