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1c2a49f6 AV |
1 | /* |
2 | * AHCI SATA platform driver | |
3 | * | |
4 | * Copyright 2004-2005 Red Hat, Inc. | |
5 | * Jeff Garzik <jgarzik@pobox.com> | |
6 | * Copyright 2010 MontaVista Software, LLC. | |
7 | * Anton Vorontsov <avorontsov@ru.mvista.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2, or (at your option) | |
12 | * any later version. | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/device.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/libata.h> | |
22 | #include <linux/ahci_platform.h> | |
23 | #include "ahci.h" | |
24 | ||
25 | static int __init ahci_probe(struct platform_device *pdev) | |
26 | { | |
27 | struct device *dev = &pdev->dev; | |
28 | struct ahci_platform_data *pdata = dev->platform_data; | |
29 | struct ata_port_info pi = { | |
30 | .flags = AHCI_FLAG_COMMON, | |
31 | .pio_mask = ATA_PIO4, | |
32 | .udma_mask = ATA_UDMA6, | |
33 | .port_ops = &ahci_ops, | |
34 | }; | |
35 | const struct ata_port_info *ppi[] = { &pi, NULL }; | |
36 | struct ahci_host_priv *hpriv; | |
37 | struct ata_host *host; | |
38 | struct resource *mem; | |
39 | int irq; | |
40 | int n_ports; | |
41 | int i; | |
42 | int rc; | |
43 | ||
44 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
45 | if (!mem) { | |
46 | dev_err(dev, "no mmio space\n"); | |
47 | return -EINVAL; | |
48 | } | |
49 | ||
50 | irq = platform_get_irq(pdev, 0); | |
51 | if (irq <= 0) { | |
52 | dev_err(dev, "no irq\n"); | |
53 | return -EINVAL; | |
54 | } | |
55 | ||
56 | if (pdata && pdata->init) { | |
57 | rc = pdata->init(dev); | |
58 | if (rc) | |
59 | return rc; | |
60 | } | |
61 | ||
62 | if (pdata && pdata->ata_port_info) | |
63 | pi = *pdata->ata_port_info; | |
64 | ||
65 | hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL); | |
66 | if (!hpriv) { | |
67 | rc = -ENOMEM; | |
68 | goto err0; | |
69 | } | |
70 | ||
71 | hpriv->flags |= (unsigned long)pi.private_data; | |
72 | ||
73 | hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem)); | |
74 | if (!hpriv->mmio) { | |
75 | dev_err(dev, "can't map %pR\n", mem); | |
76 | rc = -ENOMEM; | |
77 | goto err0; | |
78 | } | |
79 | ||
80 | ahci_save_initial_config(dev, hpriv, | |
81 | pdata ? pdata->force_port_map : 0, | |
82 | pdata ? pdata->mask_port_map : 0); | |
83 | ||
84 | /* prepare host */ | |
85 | if (hpriv->cap & HOST_CAP_NCQ) | |
86 | pi.flags |= ATA_FLAG_NCQ; | |
87 | ||
88 | if (hpriv->cap & HOST_CAP_PMP) | |
89 | pi.flags |= ATA_FLAG_PMP; | |
90 | ||
91 | ahci_set_em_messages(hpriv, &pi); | |
92 | ||
93 | /* CAP.NP sometimes indicate the index of the last enabled | |
94 | * port, at other times, that of the last possible port, so | |
95 | * determining the maximum port number requires looking at | |
96 | * both CAP.NP and port_map. | |
97 | */ | |
98 | n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map)); | |
99 | ||
100 | host = ata_host_alloc_pinfo(dev, ppi, n_ports); | |
101 | if (!host) { | |
102 | rc = -ENOMEM; | |
103 | goto err0; | |
104 | } | |
105 | ||
106 | host->private_data = hpriv; | |
107 | ||
108 | if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss) | |
109 | host->flags |= ATA_HOST_PARALLEL_SCAN; | |
110 | else | |
111 | printk(KERN_INFO "ahci: SSS flag set, parallel bus scan disabled\n"); | |
112 | ||
113 | if (pi.flags & ATA_FLAG_EM) | |
114 | ahci_reset_em(host); | |
115 | ||
116 | for (i = 0; i < host->n_ports; i++) { | |
117 | struct ata_port *ap = host->ports[i]; | |
118 | ||
119 | ata_port_desc(ap, "mmio %pR", mem); | |
120 | ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80); | |
121 | ||
122 | /* set initial link pm policy */ | |
123 | ap->pm_policy = NOT_AVAILABLE; | |
124 | ||
125 | /* set enclosure management message type */ | |
126 | if (ap->flags & ATA_FLAG_EM) | |
127 | ap->em_message_type = ahci_em_messages; | |
128 | ||
129 | /* disabled/not-implemented port */ | |
130 | if (!(hpriv->port_map & (1 << i))) | |
131 | ap->ops = &ata_dummy_port_ops; | |
132 | } | |
133 | ||
134 | rc = ahci_reset_controller(host); | |
135 | if (rc) | |
136 | goto err0; | |
137 | ||
138 | ahci_init_controller(host); | |
139 | ahci_print_info(host, "platform"); | |
140 | ||
141 | rc = ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED, | |
142 | &ahci_sht); | |
143 | if (rc) | |
144 | goto err0; | |
145 | ||
146 | return 0; | |
147 | err0: | |
148 | if (pdata && pdata->exit) | |
149 | pdata->exit(dev); | |
150 | return rc; | |
151 | } | |
152 | ||
153 | static int __devexit ahci_remove(struct platform_device *pdev) | |
154 | { | |
155 | struct device *dev = &pdev->dev; | |
156 | struct ahci_platform_data *pdata = dev->platform_data; | |
157 | struct ata_host *host = dev_get_drvdata(dev); | |
158 | ||
159 | ata_host_detach(host); | |
160 | ||
161 | if (pdata && pdata->exit) | |
162 | pdata->exit(dev); | |
163 | ||
164 | return 0; | |
165 | } | |
166 | ||
167 | static struct platform_driver ahci_driver = { | |
168 | .probe = ahci_probe, | |
169 | .remove = __devexit_p(ahci_remove), | |
170 | .driver = { | |
171 | .name = "ahci", | |
172 | .owner = THIS_MODULE, | |
173 | }, | |
174 | }; | |
175 | ||
176 | static int __init ahci_init(void) | |
177 | { | |
178 | return platform_driver_probe(&ahci_driver, ahci_probe); | |
179 | } | |
180 | module_init(ahci_init); | |
181 | ||
182 | static void __exit ahci_exit(void) | |
183 | { | |
184 | platform_driver_unregister(&ahci_driver); | |
185 | } | |
186 | module_exit(ahci_exit); | |
187 | ||
188 | MODULE_DESCRIPTION("AHCI SATA platform driver"); | |
189 | MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); | |
190 | MODULE_LICENSE("GPL"); | |
191 | MODULE_ALIAS("platform:ahci"); |