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 (ioread8(ap->ioaddr.bmdma_addr + 1) & 1) 81 return ATA_CBL_PATA40; 82 return ATA_CBL_PATA80; 83 case 1: /* Legacy SATA port */ 84 return ATA_CBL_SATA; 85 } 86 87 BUG(); 88 return 0; /* Our BUG macro needs the right markup */ 89 } 90 91 /* No PIO or DMA methods needed for this device */ 92 93 static struct scsi_host_template marvell_sht = { 94 ATA_BMDMA_SHT(DRV_NAME), 95 }; 96 97 static struct ata_port_operations marvell_ops = { 98 .inherits = &ata_bmdma_port_ops, 99 .cable_detect = marvell_cable_detect, 100 .prereset = marvell_pre_reset, 101 }; 102 103 104 /** 105 * marvell_init_one - Register Marvell ATA PCI device with kernel services 106 * @pdev: PCI device to register 107 * @id: PCI device ID 108 * 109 * Called from kernel PCI layer. 110 * 111 * LOCKING: 112 * Inherited from PCI layer (may sleep). 113 * 114 * RETURNS: 115 * Zero on success, or -ERRNO value. 116 */ 117 118 static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id) 119 { 120 static const struct ata_port_info info = { 121 .flags = ATA_FLAG_SLAVE_POSS, 122 123 .pio_mask = ATA_PIO4, 124 .mwdma_mask = ATA_MWDMA2, 125 .udma_mask = ATA_UDMA5, 126 127 .port_ops = &marvell_ops, 128 }; 129 static const struct ata_port_info info_sata = { 130 /* Slave possible as its magically mapped not real */ 131 .flags = ATA_FLAG_SLAVE_POSS, 132 133 .pio_mask = ATA_PIO4, 134 .mwdma_mask = ATA_MWDMA2, 135 .udma_mask = ATA_UDMA6, 136 137 .port_ops = &marvell_ops, 138 }; 139 const struct ata_port_info *ppi[] = { &info, &info_sata }; 140 141 if (pdev->device == 0x6101) 142 ppi[1] = &ata_dummy_port_info; 143 144 #if IS_ENABLED(CONFIG_SATA_AHCI) 145 if (!marvell_pata_active(pdev)) { 146 dev_info(&pdev->dev, 147 "PATA port not active, deferring to AHCI driver.\n"); 148 return -ENODEV; 149 } 150 #endif 151 return ata_pci_bmdma_init_one(pdev, ppi, &marvell_sht, NULL, 0); 152 } 153 154 static const struct pci_device_id marvell_pci_tbl[] = { 155 { PCI_DEVICE(0x11AB, 0x6101), }, 156 { PCI_DEVICE(0x11AB, 0x6121), }, 157 { PCI_DEVICE(0x11AB, 0x6123), }, 158 { PCI_DEVICE(0x11AB, 0x6145), }, 159 { PCI_DEVICE(0x1B4B, 0x91A0), }, 160 { PCI_DEVICE(0x1B4B, 0x91A4), }, 161 162 { } /* terminate list */ 163 }; 164 165 static struct pci_driver marvell_pci_driver = { 166 .name = DRV_NAME, 167 .id_table = marvell_pci_tbl, 168 .probe = marvell_init_one, 169 .remove = ata_pci_remove_one, 170 #ifdef CONFIG_PM_SLEEP 171 .suspend = ata_pci_device_suspend, 172 .resume = ata_pci_device_resume, 173 #endif 174 }; 175 176 module_pci_driver(marvell_pci_driver); 177 178 MODULE_AUTHOR("Alan Cox"); 179 MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode"); 180 MODULE_LICENSE("GPL"); 181 MODULE_DEVICE_TABLE(pci, marvell_pci_tbl); 182 MODULE_VERSION(DRV_VERSION); 183