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 int i; 36 u32 devices; 37 void __iomem *barp; 38 39 /* We don't yet know how to do this for other devices */ 40 if (pdev->device != 0x6145) 41 return 1; 42 43 barp = pci_iomap(pdev, 5, 0x10); 44 if (barp == NULL) 45 return -ENOMEM; 46 47 printk("BAR5:"); 48 for(i = 0; i <= 0x0F; i++) 49 printk("%02X:%02X ", i, ioread8(barp + i)); 50 printk("\n"); 51 52 devices = ioread32(barp + 0x0C); 53 pci_iounmap(pdev, barp); 54 55 if (devices & 0x10) 56 return 1; 57 return 0; 58 } 59 60 /** 61 * marvell_pre_reset - probe begin 62 * @link: link 63 * @deadline: deadline jiffies for the operation 64 * 65 * Perform the PATA port setup we need. 66 */ 67 68 static int marvell_pre_reset(struct ata_link *link, unsigned long deadline) 69 { 70 struct ata_port *ap = link->ap; 71 struct pci_dev *pdev = to_pci_dev(ap->host->dev); 72 73 if (pdev->device == 0x6145 && ap->port_no == 0 && 74 !marvell_pata_active(pdev)) /* PATA enable ? */ 75 return -ENOENT; 76 77 return ata_sff_prereset(link, deadline); 78 } 79 80 static int marvell_cable_detect(struct ata_port *ap) 81 { 82 /* Cable type */ 83 switch(ap->port_no) 84 { 85 case 0: 86 if (ioread8(ap->ioaddr.bmdma_addr + 1) & 1) 87 return ATA_CBL_PATA40; 88 return ATA_CBL_PATA80; 89 case 1: /* Legacy SATA port */ 90 return ATA_CBL_SATA; 91 } 92 93 BUG(); 94 return 0; /* Our BUG macro needs the right markup */ 95 } 96 97 /* No PIO or DMA methods needed for this device */ 98 99 static struct scsi_host_template marvell_sht = { 100 ATA_BMDMA_SHT(DRV_NAME), 101 }; 102 103 static struct ata_port_operations marvell_ops = { 104 .inherits = &ata_bmdma_port_ops, 105 .cable_detect = marvell_cable_detect, 106 .prereset = marvell_pre_reset, 107 }; 108 109 110 /** 111 * marvell_init_one - Register Marvell ATA PCI device with kernel services 112 * @pdev: PCI device to register 113 * @ent: Entry in marvell_pci_tbl matching with @pdev 114 * 115 * Called from kernel PCI layer. 116 * 117 * LOCKING: 118 * Inherited from PCI layer (may sleep). 119 * 120 * RETURNS: 121 * Zero on success, or -ERRNO value. 122 */ 123 124 static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id) 125 { 126 static const struct ata_port_info info = { 127 .flags = ATA_FLAG_SLAVE_POSS, 128 129 .pio_mask = ATA_PIO4, 130 .mwdma_mask = ATA_MWDMA2, 131 .udma_mask = ATA_UDMA5, 132 133 .port_ops = &marvell_ops, 134 }; 135 static const struct ata_port_info info_sata = { 136 /* Slave possible as its magically mapped not real */ 137 .flags = ATA_FLAG_SLAVE_POSS, 138 139 .pio_mask = ATA_PIO4, 140 .mwdma_mask = ATA_MWDMA2, 141 .udma_mask = ATA_UDMA6, 142 143 .port_ops = &marvell_ops, 144 }; 145 const struct ata_port_info *ppi[] = { &info, &info_sata }; 146 147 if (pdev->device == 0x6101) 148 ppi[1] = &ata_dummy_port_info; 149 150 #if IS_ENABLED(CONFIG_SATA_AHCI) 151 if (!marvell_pata_active(pdev)) { 152 printk(KERN_INFO DRV_NAME ": PATA port not active, deferring to AHCI driver.\n"); 153 return -ENODEV; 154 } 155 #endif 156 return ata_pci_bmdma_init_one(pdev, ppi, &marvell_sht, NULL, 0); 157 } 158 159 static const struct pci_device_id marvell_pci_tbl[] = { 160 { PCI_DEVICE(0x11AB, 0x6101), }, 161 { PCI_DEVICE(0x11AB, 0x6121), }, 162 { PCI_DEVICE(0x11AB, 0x6123), }, 163 { PCI_DEVICE(0x11AB, 0x6145), }, 164 { PCI_DEVICE(0x1B4B, 0x91A0), }, 165 { PCI_DEVICE(0x1B4B, 0x91A4), }, 166 167 { } /* terminate list */ 168 }; 169 170 static struct pci_driver marvell_pci_driver = { 171 .name = DRV_NAME, 172 .id_table = marvell_pci_tbl, 173 .probe = marvell_init_one, 174 .remove = ata_pci_remove_one, 175 #ifdef CONFIG_PM_SLEEP 176 .suspend = ata_pci_device_suspend, 177 .resume = ata_pci_device_resume, 178 #endif 179 }; 180 181 module_pci_driver(marvell_pci_driver); 182 183 MODULE_AUTHOR("Alan Cox"); 184 MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode"); 185 MODULE_LICENSE("GPL"); 186 MODULE_DEVICE_TABLE(pci, marvell_pci_tbl); 187 MODULE_VERSION(DRV_VERSION); 188