Loading...
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * AHCI SATA platform driver
4 *
5 * Copyright 2004-2005 Red Hat, Inc.
6 * Jeff Garzik <jgarzik@pobox.com>
7 * Copyright 2010 MontaVista Software, LLC.
8 * Anton Vorontsov <avorontsov@ru.mvista.com>
9 */
10
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/pm.h>
14#include <linux/device.h>
15#include <linux/of_device.h>
16#include <linux/platform_device.h>
17#include <linux/libata.h>
18#include <linux/ahci_platform.h>
19#include <linux/acpi.h>
20#include <linux/pci_ids.h>
21#include "ahci.h"
22
23#define DRV_NAME "ahci"
24
25static const struct ata_port_info ahci_port_info = {
26 .flags = AHCI_FLAG_COMMON,
27 .pio_mask = ATA_PIO4,
28 .udma_mask = ATA_UDMA6,
29 .port_ops = &ahci_platform_ops,
30};
31
32static const struct ata_port_info ahci_port_info_nolpm = {
33 .flags = AHCI_FLAG_COMMON | ATA_FLAG_NO_LPM,
34 .pio_mask = ATA_PIO4,
35 .udma_mask = ATA_UDMA6,
36 .port_ops = &ahci_platform_ops,
37};
38
39static struct scsi_host_template ahci_platform_sht = {
40 AHCI_SHT(DRV_NAME),
41};
42
43static int ahci_probe(struct platform_device *pdev)
44{
45 struct device *dev = &pdev->dev;
46 struct ahci_host_priv *hpriv;
47 const struct ata_port_info *port;
48 int rc;
49
50 hpriv = ahci_platform_get_resources(pdev,
51 AHCI_PLATFORM_GET_RESETS);
52 if (IS_ERR(hpriv))
53 return PTR_ERR(hpriv);
54
55 rc = ahci_platform_enable_resources(hpriv);
56 if (rc)
57 return rc;
58
59 of_property_read_u32(dev->of_node,
60 "ports-implemented", &hpriv->force_port_map);
61
62 if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci"))
63 hpriv->flags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ;
64
65 port = acpi_device_get_match_data(dev);
66 if (!port)
67 port = &ahci_port_info;
68
69 rc = ahci_platform_init_host(pdev, hpriv, port,
70 &ahci_platform_sht);
71 if (rc)
72 goto disable_resources;
73
74 return 0;
75disable_resources:
76 ahci_platform_disable_resources(hpriv);
77 return rc;
78}
79
80static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
81 ahci_platform_resume);
82
83static const struct of_device_id ahci_of_match[] = {
84 { .compatible = "generic-ahci", },
85 /* Keep the following compatibles for device tree compatibility */
86 { .compatible = "snps,spear-ahci", },
87 { .compatible = "ibm,476gtr-ahci", },
88 { .compatible = "snps,dwc-ahci", },
89 { .compatible = "hisilicon,hisi-ahci", },
90 { .compatible = "cavium,octeon-7130-ahci", },
91 {},
92};
93MODULE_DEVICE_TABLE(of, ahci_of_match);
94
95static const struct acpi_device_id ahci_acpi_match[] = {
96 { "APMC0D33", (unsigned long)&ahci_port_info_nolpm },
97 { ACPI_DEVICE_CLASS(PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff) },
98 {},
99};
100MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
101
102static struct platform_driver ahci_driver = {
103 .probe = ahci_probe,
104 .remove = ata_platform_remove_one,
105 .shutdown = ahci_platform_shutdown,
106 .driver = {
107 .name = DRV_NAME,
108 .of_match_table = ahci_of_match,
109 .acpi_match_table = ahci_acpi_match,
110 .pm = &ahci_pm_ops,
111 },
112};
113module_platform_driver(ahci_driver);
114
115MODULE_DESCRIPTION("AHCI SATA platform driver");
116MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
117MODULE_LICENSE("GPL");
118MODULE_ALIAS("platform:ahci");
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/gfp.h>
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
26static struct scsi_host_template ahci_platform_sht = {
27 AHCI_SHT("ahci_platform"),
28};
29
30static 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
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) {
66 dev_err(dev, "can't alloc ahci_host_priv\n");
67 return -ENOMEM;
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);
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;
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
132 /* set enclosure management message type */
133 if (ap->flags & ATA_FLAG_EM)
134 ap->em_message_type = hpriv->em_msg_type;
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,
149 &ahci_platform_sht);
150 if (rc)
151 goto err0;
152
153 return 0;
154err0:
155 if (pdata && pdata->exit)
156 pdata->exit(dev);
157 return rc;
158}
159
160static 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
174static struct platform_driver ahci_driver = {
175 .remove = __devexit_p(ahci_remove),
176 .driver = {
177 .name = "ahci",
178 .owner = THIS_MODULE,
179 },
180};
181
182static int __init ahci_init(void)
183{
184 return platform_driver_probe(&ahci_driver, ahci_probe);
185}
186module_init(ahci_init);
187
188static void __exit ahci_exit(void)
189{
190 platform_driver_unregister(&ahci_driver);
191}
192module_exit(ahci_exit);
193
194MODULE_DESCRIPTION("AHCI SATA platform driver");
195MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
196MODULE_LICENSE("GPL");
197MODULE_ALIAS("platform:ahci");