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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> | |
fbaf666b | 16 | #include <linux/gfp.h> |
1c2a49f6 AV |
17 | #include <linux/module.h> |
18 | #include <linux/init.h> | |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/device.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/libata.h> | |
23 | #include <linux/ahci_platform.h> | |
24 | #include "ahci.h" | |
25 | ||
fad16e7a TH |
26 | static struct scsi_host_template ahci_platform_sht = { |
27 | AHCI_SHT("ahci_platform"), | |
28 | }; | |
29 | ||
1c2a49f6 AV |
30 | static int __init ahci_probe(struct platform_device *pdev) |
31 | { | |
32 | struct device *dev = &pdev->dev; | |
33 | struct ahci_platform_data *pdata = dev->platform_data; | |
34 | struct ata_port_info pi = { | |
35 | .flags = AHCI_FLAG_COMMON, | |
36 | .pio_mask = ATA_PIO4, | |
37 | .udma_mask = ATA_UDMA6, | |
38 | .port_ops = &ahci_ops, | |
39 | }; | |
40 | const struct ata_port_info *ppi[] = { &pi, NULL }; | |
41 | struct ahci_host_priv *hpriv; | |
42 | struct ata_host *host; | |
43 | struct resource *mem; | |
44 | int irq; | |
45 | int n_ports; | |
46 | int i; | |
47 | int rc; | |
48 | ||
49 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
50 | if (!mem) { | |
51 | dev_err(dev, "no mmio space\n"); | |
52 | return -EINVAL; | |
53 | } | |
54 | ||
55 | irq = platform_get_irq(pdev, 0); | |
56 | if (irq <= 0) { | |
57 | dev_err(dev, "no irq\n"); | |
58 | return -EINVAL; | |
59 | } | |
60 | ||
1c2a49f6 AV |
61 | if (pdata && pdata->ata_port_info) |
62 | pi = *pdata->ata_port_info; | |
63 | ||
64 | hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL); | |
65 | if (!hpriv) { | |
08354809 JB |
66 | dev_err(dev, "can't alloc ahci_host_priv\n"); |
67 | return -ENOMEM; | |
1c2a49f6 AV |
68 | } |
69 | ||
70 | hpriv->flags |= (unsigned long)pi.private_data; | |
71 | ||
72 | hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem)); | |
73 | if (!hpriv->mmio) { | |
74 | dev_err(dev, "can't map %pR\n", mem); | |
08354809 JB |
75 | return -ENOMEM; |
76 | } | |
77 | ||
78 | /* | |
79 | * Some platforms might need to prepare for mmio region access, | |
80 | * which could be done in the following init call. So, the mmio | |
81 | * region shouldn't be accessed before init (if provided) has | |
82 | * returned successfully. | |
83 | */ | |
84 | if (pdata && pdata->init) { | |
85 | rc = pdata->init(dev, hpriv->mmio); | |
86 | if (rc) | |
87 | return rc; | |
1c2a49f6 AV |
88 | } |
89 | ||
90 | ahci_save_initial_config(dev, hpriv, | |
91 | pdata ? pdata->force_port_map : 0, | |
92 | pdata ? pdata->mask_port_map : 0); | |
93 | ||
94 | /* prepare host */ | |
95 | if (hpriv->cap & HOST_CAP_NCQ) | |
96 | pi.flags |= ATA_FLAG_NCQ; | |
97 | ||
98 | if (hpriv->cap & HOST_CAP_PMP) | |
99 | pi.flags |= ATA_FLAG_PMP; | |
100 | ||
101 | ahci_set_em_messages(hpriv, &pi); | |
102 | ||
103 | /* CAP.NP sometimes indicate the index of the last enabled | |
104 | * port, at other times, that of the last possible port, so | |
105 | * determining the maximum port number requires looking at | |
106 | * both CAP.NP and port_map. | |
107 | */ | |
108 | n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map)); | |
109 | ||
110 | host = ata_host_alloc_pinfo(dev, ppi, n_ports); | |
111 | if (!host) { | |
112 | rc = -ENOMEM; | |
113 | goto err0; | |
114 | } | |
115 | ||
116 | host->private_data = hpriv; | |
117 | ||
118 | if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss) | |
119 | host->flags |= ATA_HOST_PARALLEL_SCAN; | |
120 | else | |
121 | printk(KERN_INFO "ahci: SSS flag set, parallel bus scan disabled\n"); | |
122 | ||
123 | if (pi.flags & ATA_FLAG_EM) | |
124 | ahci_reset_em(host); | |
125 | ||
126 | for (i = 0; i < host->n_ports; i++) { | |
127 | struct ata_port *ap = host->ports[i]; | |
128 | ||
129 | ata_port_desc(ap, "mmio %pR", mem); | |
130 | ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80); | |
131 | ||
1c2a49f6 AV |
132 | /* set enclosure management message type */ |
133 | if (ap->flags & ATA_FLAG_EM) | |
55787183 | 134 | ap->em_message_type = hpriv->em_msg_type; |
1c2a49f6 AV |
135 | |
136 | /* disabled/not-implemented port */ | |
137 | if (!(hpriv->port_map & (1 << i))) | |
138 | ap->ops = &ata_dummy_port_ops; | |
139 | } | |
140 | ||
141 | rc = ahci_reset_controller(host); | |
142 | if (rc) | |
143 | goto err0; | |
144 | ||
145 | ahci_init_controller(host); | |
146 | ahci_print_info(host, "platform"); | |
147 | ||
148 | rc = ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED, | |
fad16e7a | 149 | &ahci_platform_sht); |
1c2a49f6 AV |
150 | if (rc) |
151 | goto err0; | |
152 | ||
153 | return 0; | |
154 | err0: | |
155 | if (pdata && pdata->exit) | |
156 | pdata->exit(dev); | |
157 | return rc; | |
158 | } | |
159 | ||
160 | static int __devexit ahci_remove(struct platform_device *pdev) | |
161 | { | |
162 | struct device *dev = &pdev->dev; | |
163 | struct ahci_platform_data *pdata = dev->platform_data; | |
164 | struct ata_host *host = dev_get_drvdata(dev); | |
165 | ||
166 | ata_host_detach(host); | |
167 | ||
168 | if (pdata && pdata->exit) | |
169 | pdata->exit(dev); | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | static struct platform_driver ahci_driver = { | |
1c2a49f6 AV |
175 | .remove = __devexit_p(ahci_remove), |
176 | .driver = { | |
177 | .name = "ahci", | |
178 | .owner = THIS_MODULE, | |
179 | }, | |
180 | }; | |
181 | ||
182 | static int __init ahci_init(void) | |
183 | { | |
184 | return platform_driver_probe(&ahci_driver, ahci_probe); | |
185 | } | |
186 | module_init(ahci_init); | |
187 | ||
188 | static void __exit ahci_exit(void) | |
189 | { | |
190 | platform_driver_unregister(&ahci_driver); | |
191 | } | |
192 | module_exit(ahci_exit); | |
193 | ||
194 | MODULE_DESCRIPTION("AHCI SATA platform driver"); | |
195 | MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); | |
196 | MODULE_LICENSE("GPL"); | |
197 | MODULE_ALIAS("platform:ahci"); |