diff options
author | Anton Vorontsov <avorontsov@ru.mvista.com> | 2010-03-04 12:06:06 -0500 |
---|---|---|
committer | Jeff Garzik <jgarzik@redhat.com> | 2010-05-14 17:08:01 -0400 |
commit | 1c2a49f61785ebbcbfb481a2aab659020f0457f7 (patch) | |
tree | bb018719be09387c07345f0954408b3aa8c16a98 /drivers | |
parent | 365cfa1ed5a36f9bcb9f64c9f0f52155af2e9fef (diff) |
ahci: Add platform driver
This can be used for AHCI-compatible interfaces implemented inside
System-On-Chip solutions, or AHCI devices connected via localbus.
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/ata/Kconfig | 8 | ||||
-rw-r--r-- | drivers/ata/Makefile | 1 | ||||
-rw-r--r-- | drivers/ata/ahci_platform.c | 191 |
3 files changed, 200 insertions, 0 deletions
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig index 01c52c415bdc..cbadb9fa1277 100644 --- a/drivers/ata/Kconfig +++ b/drivers/ata/Kconfig | |||
@@ -65,6 +65,14 @@ config SATA_AHCI | |||
65 | 65 | ||
66 | If unsure, say N. | 66 | If unsure, say N. |
67 | 67 | ||
68 | config SATA_AHCI_PLATFORM | ||
69 | tristate "Platform AHCI SATA support" | ||
70 | help | ||
71 | This option enables support for Platform AHCI Serial ATA | ||
72 | controllers. | ||
73 | |||
74 | If unsure, say N. | ||
75 | |||
68 | config SATA_SIL24 | 76 | config SATA_SIL24 |
69 | tristate "Silicon Image 3124/3132 SATA support" | 77 | tristate "Silicon Image 3124/3132 SATA support" |
70 | depends on PCI | 78 | depends on PCI |
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile index 20c5251e7e41..d0a93c4ad3ec 100644 --- a/drivers/ata/Makefile +++ b/drivers/ata/Makefile | |||
@@ -2,6 +2,7 @@ | |||
2 | obj-$(CONFIG_ATA) += libata.o | 2 | obj-$(CONFIG_ATA) += libata.o |
3 | 3 | ||
4 | obj-$(CONFIG_SATA_AHCI) += ahci.o libahci.o | 4 | obj-$(CONFIG_SATA_AHCI) += ahci.o libahci.o |
5 | obj-$(CONFIG_SATA_AHCI_PLATFORM) += ahci_platform.o libahci.o | ||
5 | obj-$(CONFIG_SATA_SVW) += sata_svw.o | 6 | obj-$(CONFIG_SATA_SVW) += sata_svw.o |
6 | obj-$(CONFIG_ATA_PIIX) += ata_piix.o | 7 | obj-$(CONFIG_ATA_PIIX) += ata_piix.o |
7 | obj-$(CONFIG_SATA_PROMISE) += sata_promise.o | 8 | obj-$(CONFIG_SATA_PROMISE) += sata_promise.o |
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c new file mode 100644 index 000000000000..42cdd7363fad --- /dev/null +++ b/drivers/ata/ahci_platform.c | |||
@@ -0,0 +1,191 @@ | |||
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"); | ||