1 // SPDX-License-Identifier: GPL-2.0-only
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
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>
22 #define DRV_NAME "pata_marvell"
23 #define DRV_VERSION "0.1.6"
26 * marvell_pata_active - check if PATA is active
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
33 static int marvell_pata_active(struct pci_dev *pdev)
38 /* We don't yet know how to do this for other devices */
39 if (pdev->device != 0x6145)
42 barp = pci_iomap(pdev, 5, 0x10);
46 devices = ioread32(barp + 0x0C);
47 pci_iounmap(pdev, barp);
55 * marvell_pre_reset - probe begin
57 * @deadline: deadline jiffies for the operation
59 * Perform the PATA port setup we need.
62 static int marvell_pre_reset(struct ata_link *link, unsigned long deadline)
64 struct ata_port *ap = link->ap;
65 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
67 if (pdev->device == 0x6145 && ap->port_no == 0 &&
68 !marvell_pata_active(pdev)) /* PATA enable ? */
71 return ata_sff_prereset(link, deadline);
74 static int marvell_cable_detect(struct ata_port *ap)
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 */
90 return 0; /* Our BUG macro needs the right markup */
93 /* No PIO or DMA methods needed for this device */
95 static const struct scsi_host_template marvell_sht = {
96 ATA_BMDMA_SHT(DRV_NAME),
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,
107 * marvell_init_one - Register Marvell ATA PCI device with kernel services
108 * @pdev: PCI device to register
111 * Called from kernel PCI layer.
114 * Inherited from PCI layer (may sleep).
117 * Zero on success, or -ERRNO value.
120 static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
122 static const struct ata_port_info info = {
123 .flags = ATA_FLAG_SLAVE_POSS,
125 .pio_mask = ATA_PIO4,
126 .mwdma_mask = ATA_MWDMA2,
127 .udma_mask = ATA_UDMA5,
129 .port_ops = &marvell_ops,
131 static const struct ata_port_info info_sata = {
132 /* Slave possible as its magically mapped not real */
133 .flags = ATA_FLAG_SLAVE_POSS,
135 .pio_mask = ATA_PIO4,
136 .mwdma_mask = ATA_MWDMA2,
137 .udma_mask = ATA_UDMA6,
139 .port_ops = &marvell_ops,
141 const struct ata_port_info *ppi[] = { &info, &info_sata };
143 if (pdev->device == 0x6101)
144 ppi[1] = &ata_dummy_port_info;
146 #if IS_ENABLED(CONFIG_SATA_AHCI)
147 if (!marvell_pata_active(pdev)) {
149 "PATA port not active, deferring to AHCI driver.\n");
153 return ata_pci_bmdma_init_one(pdev, ppi, &marvell_sht, NULL, 0);
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), },
164 { } /* terminate list */
167 static struct pci_driver marvell_pci_driver = {
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,
178 module_pci_driver(marvell_pci_driver);
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);