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