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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Marvell PATA driver.4 *5 * For the moment we drive the PATA port in legacy mode. That6 * isn't making full use of the device functionality but it is7 * easy to get working.8 *9 * (c) 2006 Red Hat10 */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 active27 * @pdev: PCI device28 *29 * Returns 1 if the PATA port may be active. We know how to check this30 * for the 6145 but not the other devices31 */32 33static 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 begin56 * @link: link57 * @deadline: deadline jiffies for the operation58 *59 * Perform the PATA port setup we need.60 */61 62static 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 74static 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 95static const struct scsi_host_template marvell_sht = {96 ATA_BMDMA_SHT(DRV_NAME),97};98 99static 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 services108 * @pdev: PCI device to register109 * @id: PCI device ID110 *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 120static 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#endif153 return ata_pci_bmdma_init_one(pdev, ppi, &marvell_sht, NULL, 0);154}155 156static 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 167static 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_SLEEP173 .suspend = ata_pci_device_suspend,174 .resume = ata_pci_device_resume,175#endif176};177 178module_pci_driver(marvell_pci_driver);179 180MODULE_AUTHOR("Alan Cox");181MODULE_DESCRIPTION("SCSI low-level driver for Marvell ATA in legacy mode");182MODULE_LICENSE("GPL");183MODULE_DEVICE_TABLE(pci, marvell_pci_tbl);184MODULE_VERSION(DRV_VERSION);185