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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 | * | |
7 | * (c) 2006 Red Hat <alan@redhat.com> | |
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 | } | |
cc0680a5 | 105 | return ata_std_prereset(link, deadline); |
669a5db4 JG |
106 | } |
107 | ||
108 | /** | |
109 | * jmicron_error_handler - Setup and error handler | |
110 | * @ap: Port to handle | |
111 | * | |
112 | * LOCKING: | |
113 | * None (inherited from caller). | |
114 | */ | |
115 | ||
116 | static void jmicron_error_handler(struct ata_port *ap) | |
117 | { | |
ef2f2e49 HH |
118 | ata_bmdma_drive_eh(ap, jmicron_pre_reset, ata_std_softreset, NULL, |
119 | ata_std_postreset); | |
669a5db4 JG |
120 | } |
121 | ||
122 | /* No PIO or DMA methods needed for this device */ | |
123 | ||
124 | static struct scsi_host_template jmicron_sht = { | |
68d1d07b | 125 | ATA_BMDMA_SHT(DRV_NAME), |
669a5db4 JG |
126 | }; |
127 | ||
128 | static const struct ata_port_operations jmicron_ops = { | |
669a5db4 JG |
129 | /* Task file is PCI ATA format, use helpers */ |
130 | .tf_load = ata_tf_load, | |
131 | .tf_read = ata_tf_read, | |
132 | .check_status = ata_check_status, | |
133 | .exec_command = ata_exec_command, | |
134 | .dev_select = ata_std_dev_select, | |
135 | ||
6bd99b4e | 136 | .mode_filter = ata_pci_default_filter, |
669a5db4 JG |
137 | .freeze = ata_bmdma_freeze, |
138 | .thaw = ata_bmdma_thaw, | |
139 | .error_handler = jmicron_error_handler, | |
140 | .post_internal_cmd = ata_bmdma_post_internal_cmd, | |
141 | ||
142 | /* BMDMA handling is PCI ATA format, use helpers */ | |
143 | .bmdma_setup = ata_bmdma_setup, | |
144 | .bmdma_start = ata_bmdma_start, | |
145 | .bmdma_stop = ata_bmdma_stop, | |
146 | .bmdma_status = ata_bmdma_status, | |
147 | .qc_prep = ata_qc_prep, | |
148 | .qc_issue = ata_qc_issue_prot, | |
0d5ff566 | 149 | .data_xfer = ata_data_xfer, |
669a5db4 | 150 | |
bda30288 | 151 | /* IRQ-related hooks */ |
669a5db4 JG |
152 | .irq_handler = ata_interrupt, |
153 | .irq_clear = ata_bmdma_irq_clear, | |
246ce3b6 | 154 | .irq_on = ata_irq_on, |
669a5db4 JG |
155 | |
156 | /* Generic PATA PCI ATA helpers */ | |
6bd99b4e | 157 | .port_start = ata_sff_port_start, |
669a5db4 JG |
158 | }; |
159 | ||
160 | ||
161 | /** | |
162 | * jmicron_init_one - Register Jmicron ATA PCI device with kernel services | |
163 | * @pdev: PCI device to register | |
164 | * @ent: Entry in jmicron_pci_tbl matching with @pdev | |
165 | * | |
166 | * Called from kernel PCI layer. | |
167 | * | |
168 | * LOCKING: | |
169 | * Inherited from PCI layer (may sleep). | |
170 | * | |
171 | * RETURNS: | |
172 | * Zero on success, or -ERRNO value. | |
173 | */ | |
174 | ||
175 | static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id) | |
176 | { | |
1626aeb8 | 177 | static const struct ata_port_info info = { |
669a5db4 | 178 | .sht = &jmicron_sht, |
1d2808fd | 179 | .flags = ATA_FLAG_SLAVE_POSS, |
669a5db4 JG |
180 | |
181 | .pio_mask = 0x1f, | |
182 | .mwdma_mask = 0x07, | |
bf6263a8 | 183 | .udma_mask = ATA_UDMA5, |
669a5db4 JG |
184 | |
185 | .port_ops = &jmicron_ops, | |
186 | }; | |
1626aeb8 | 187 | const struct ata_port_info *ppi[] = { &info, NULL }; |
669a5db4 | 188 | |
1626aeb8 | 189 | return ata_pci_init_one(pdev, ppi); |
669a5db4 JG |
190 | } |
191 | ||
192 | static const struct pci_device_id jmicron_pci_tbl[] = { | |
a01f48b8 TH |
193 | { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, |
194 | PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 }, | |
669a5db4 JG |
195 | { } /* terminate list */ |
196 | }; | |
197 | ||
198 | static struct pci_driver jmicron_pci_driver = { | |
199 | .name = DRV_NAME, | |
200 | .id_table = jmicron_pci_tbl, | |
201 | .probe = jmicron_init_one, | |
202 | .remove = ata_pci_remove_one, | |
438ac6d5 | 203 | #ifdef CONFIG_PM |
d39ca896 | 204 | .suspend = ata_pci_device_suspend, |
960627b7 | 205 | .resume = ata_pci_device_resume, |
438ac6d5 | 206 | #endif |
669a5db4 JG |
207 | }; |
208 | ||
209 | static int __init jmicron_init(void) | |
210 | { | |
211 | return pci_register_driver(&jmicron_pci_driver); | |
212 | } | |
213 | ||
214 | static void __exit jmicron_exit(void) | |
215 | { | |
216 | pci_unregister_driver(&jmicron_pci_driver); | |
217 | } | |
218 | ||
219 | module_init(jmicron_init); | |
220 | module_exit(jmicron_exit); | |
221 | ||
222 | MODULE_AUTHOR("Alan Cox"); | |
223 | MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports"); | |
224 | MODULE_LICENSE("GPL"); | |
225 | MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl); | |
226 | MODULE_VERSION(DRV_VERSION); | |
227 |