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669a5db4 JG |
1 | /* |
2 | * pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the | |
3 | * PATA port of the controller. The SATA ports are | |
4 | * driven by AHCI in the usual configuration although | |
5 | * this driver can handle other setups if we need it. | |
6 | * | |
ab771630 | 7 | * (c) 2006 Red Hat |
669a5db4 JG |
8 | */ |
9 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/pci.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/blkdev.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/device.h> | |
17 | #include <scsi/scsi_host.h> | |
18 | #include <linux/libata.h> | |
19 | #include <linux/ata.h> | |
20 | ||
21 | #define DRV_NAME "pata_jmicron" | |
8bc3fc47 | 22 | #define DRV_VERSION "0.1.5" |
669a5db4 JG |
23 | |
24 | typedef enum { | |
25 | PORT_PATA0 = 0, | |
26 | PORT_PATA1 = 1, | |
27 | PORT_SATA = 2, | |
28 | } port_type; | |
29 | ||
30 | /** | |
31 | * jmicron_pre_reset - check for 40/80 pin | |
cc0680a5 | 32 | * @link: ATA link |
d4b2bab4 | 33 | * @deadline: deadline jiffies for the operation |
669a5db4 JG |
34 | * |
35 | * Perform the PATA port setup we need. | |
d4b2bab4 | 36 | * |
669a5db4 JG |
37 | * On the Jmicron 361/363 there is a single PATA port that can be mapped |
38 | * either as primary or secondary (or neither). We don't do any policy | |
39 | * and setup here. We assume that has been done by init_one and the | |
40 | * BIOS. | |
41 | */ | |
cc0680a5 | 42 | static int jmicron_pre_reset(struct ata_link *link, unsigned long deadline) |
669a5db4 | 43 | { |
cc0680a5 | 44 | struct ata_port *ap = link->ap; |
669a5db4 JG |
45 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
46 | u32 control; | |
47 | u32 control5; | |
48 | int port_mask = 1<< (4 * ap->port_no); | |
49 | int port = ap->port_no; | |
50 | port_type port_map[2]; | |
51 | ||
52 | /* Check if our port is enabled */ | |
53 | pci_read_config_dword(pdev, 0x40, &control); | |
54 | if ((control & port_mask) == 0) | |
c961922b | 55 | return -ENOENT; |
669a5db4 JG |
56 | |
57 | /* There are two basic mappings. One has the two SATA ports merged | |
58 | as master/slave and the secondary as PATA, the other has only the | |
59 | SATA port mapped */ | |
60 | if (control & (1 << 23)) { | |
61 | port_map[0] = PORT_SATA; | |
62 | port_map[1] = PORT_PATA0; | |
63 | } else { | |
64 | port_map[0] = PORT_SATA; | |
65 | port_map[1] = PORT_SATA; | |
66 | } | |
67 | ||
68 | /* The 365/366 may have this bit set to map the second PATA port | |
69 | as the internal primary channel */ | |
70 | pci_read_config_dword(pdev, 0x80, &control5); | |
71 | if (control5 & (1<<24)) | |
72 | port_map[0] = PORT_PATA1; | |
73 | ||
74 | /* The two ports may then be logically swapped by the firmware */ | |
75 | if (control & (1 << 22)) | |
76 | port = port ^ 1; | |
77 | ||
78 | /* | |
79 | * Now we know which physical port we are talking about we can | |
80 | * actually do our cable checking etc. Thankfully we don't need | |
81 | * to do the plumbing for other cases. | |
82 | */ | |
0706efd6 | 83 | switch (port_map[port]) { |
669a5db4 | 84 | case PORT_PATA0: |
0706efd6 TH |
85 | if ((control & (1 << 5)) == 0) |
86 | return -ENOENT; | |
669a5db4 JG |
87 | if (control & (1 << 3)) /* 40/80 pin primary */ |
88 | ap->cbl = ATA_CBL_PATA40; | |
89 | else | |
90 | ap->cbl = ATA_CBL_PATA80; | |
91 | break; | |
92 | case PORT_PATA1: | |
93 | /* Bit 21 is set if the port is enabled */ | |
94 | if ((control5 & (1 << 21)) == 0) | |
0706efd6 | 95 | return -ENOENT; |
669a5db4 JG |
96 | if (control5 & (1 << 19)) /* 40/80 pin secondary */ |
97 | ap->cbl = ATA_CBL_PATA40; | |
98 | else | |
99 | ap->cbl = ATA_CBL_PATA80; | |
100 | break; | |
101 | case PORT_SATA: | |
102 | ap->cbl = ATA_CBL_SATA; | |
103 | break; | |
104 | } | |
9363c382 | 105 | return ata_sff_prereset(link, deadline); |
669a5db4 JG |
106 | } |
107 | ||
669a5db4 JG |
108 | /* No PIO or DMA methods needed for this device */ |
109 | ||
110 | static struct scsi_host_template jmicron_sht = { | |
68d1d07b | 111 | ATA_BMDMA_SHT(DRV_NAME), |
669a5db4 JG |
112 | }; |
113 | ||
029cfd6b TH |
114 | static struct ata_port_operations jmicron_ops = { |
115 | .inherits = &ata_bmdma_port_ops, | |
887125e3 | 116 | .prereset = jmicron_pre_reset, |
669a5db4 JG |
117 | }; |
118 | ||
119 | ||
120 | /** | |
121 | * jmicron_init_one - Register Jmicron ATA PCI device with kernel services | |
122 | * @pdev: PCI device to register | |
123 | * @ent: Entry in jmicron_pci_tbl matching with @pdev | |
124 | * | |
125 | * Called from kernel PCI layer. | |
126 | * | |
127 | * LOCKING: | |
128 | * Inherited from PCI layer (may sleep). | |
129 | * | |
130 | * RETURNS: | |
131 | * Zero on success, or -ERRNO value. | |
132 | */ | |
133 | ||
134 | static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id) | |
135 | { | |
1626aeb8 | 136 | static const struct ata_port_info info = { |
1d2808fd | 137 | .flags = ATA_FLAG_SLAVE_POSS, |
669a5db4 JG |
138 | |
139 | .pio_mask = 0x1f, | |
140 | .mwdma_mask = 0x07, | |
bf6263a8 | 141 | .udma_mask = ATA_UDMA5, |
669a5db4 JG |
142 | |
143 | .port_ops = &jmicron_ops, | |
144 | }; | |
1626aeb8 | 145 | const struct ata_port_info *ppi[] = { &info, NULL }; |
669a5db4 | 146 | |
9363c382 | 147 | return ata_pci_sff_init_one(pdev, ppi, &jmicron_sht, NULL); |
669a5db4 JG |
148 | } |
149 | ||
150 | static const struct pci_device_id jmicron_pci_tbl[] = { | |
a01f48b8 TH |
151 | { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, |
152 | PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 }, | |
669a5db4 JG |
153 | { } /* terminate list */ |
154 | }; | |
155 | ||
156 | static struct pci_driver jmicron_pci_driver = { | |
157 | .name = DRV_NAME, | |
158 | .id_table = jmicron_pci_tbl, | |
159 | .probe = jmicron_init_one, | |
160 | .remove = ata_pci_remove_one, | |
438ac6d5 | 161 | #ifdef CONFIG_PM |
d39ca896 | 162 | .suspend = ata_pci_device_suspend, |
960627b7 | 163 | .resume = ata_pci_device_resume, |
438ac6d5 | 164 | #endif |
669a5db4 JG |
165 | }; |
166 | ||
167 | static int __init jmicron_init(void) | |
168 | { | |
169 | return pci_register_driver(&jmicron_pci_driver); | |
170 | } | |
171 | ||
172 | static void __exit jmicron_exit(void) | |
173 | { | |
174 | pci_unregister_driver(&jmicron_pci_driver); | |
175 | } | |
176 | ||
177 | module_init(jmicron_init); | |
178 | module_exit(jmicron_exit); | |
179 | ||
180 | MODULE_AUTHOR("Alan Cox"); | |
181 | MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports"); | |
182 | MODULE_LICENSE("GPL"); | |
183 | MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl); | |
184 | MODULE_VERSION(DRV_VERSION); | |
185 |