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 | 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(dev: pdev, bar: 5, max: 0x10); |
43 | if (barp == NULL) |
44 | return -ENOMEM; |
45 | |
46 | devices = ioread32(barp + 0x0C); |
47 | pci_iounmap(dev: 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 | |
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 | |
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 | |
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, sht: &marvell_sht, NULL, hflags: 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 | |