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
marvell_pata_active(struct pci_dev * pdev)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
marvell_pre_reset(struct ata_link * link,unsigned long deadline)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
marvell_cable_detect(struct ata_port * ap)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 const 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
marvell_init_one(struct pci_dev * pdev,const struct pci_device_id * id)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