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1/*
2 * AMD Seattle AHCI SATA driver
3 *
4 * Copyright (c) 2015, Advanced Micro Devices
5 * Author: Brijesh Singh <brijesh.singh@amd.com>
6 *
7 * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
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 of the License.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
18
19#include <linux/kernel.h>
20#include <linux/module.h>
21#include <linux/pm.h>
22#include <linux/device.h>
23#include <linux/of_device.h>
24#include <linux/platform_device.h>
25#include <linux/libata.h>
26#include <linux/ahci_platform.h>
27#include <linux/acpi.h>
28#include <linux/pci_ids.h>
29#include "ahci.h"
30
31/* SGPIO Control Register definition
32 *
33 * Bit Type Description
34 * 31 RW OD7.2 (activity)
35 * 30 RW OD7.1 (locate)
36 * 29 RW OD7.0 (fault)
37 * 28...8 RW OD6.2...OD0.0 (3bits per port, 1 bit per LED)
38 * 7 RO SGPIO feature flag
39 * 6:4 RO Reserved
40 * 3:0 RO Number of ports (0 means no port supported)
41 */
42#define ACTIVITY_BIT_POS(x) (8 + (3 * x))
43#define LOCATE_BIT_POS(x) (ACTIVITY_BIT_POS(x) + 1)
44#define FAULT_BIT_POS(x) (LOCATE_BIT_POS(x) + 1)
45
46#define ACTIVITY_MASK 0x00010000
47#define LOCATE_MASK 0x00080000
48#define FAULT_MASK 0x00400000
49
50#define DRV_NAME "ahci-seattle"
51
52static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
53 ssize_t size);
54
55struct seattle_plat_data {
56 void __iomem *sgpio_ctrl;
57};
58
59static struct ata_port_operations ahci_port_ops = {
60 .inherits = &ahci_ops,
61};
62
63static const struct ata_port_info ahci_port_info = {
64 .flags = AHCI_FLAG_COMMON,
65 .pio_mask = ATA_PIO4,
66 .udma_mask = ATA_UDMA6,
67 .port_ops = &ahci_port_ops,
68};
69
70static struct ata_port_operations ahci_seattle_ops = {
71 .inherits = &ahci_ops,
72 .transmit_led_message = seattle_transmit_led_message,
73};
74
75static const struct ata_port_info ahci_port_seattle_info = {
76 .flags = AHCI_FLAG_COMMON | ATA_FLAG_EM | ATA_FLAG_SW_ACTIVITY,
77 .link_flags = ATA_LFLAG_SW_ACTIVITY,
78 .pio_mask = ATA_PIO4,
79 .udma_mask = ATA_UDMA6,
80 .port_ops = &ahci_seattle_ops,
81};
82
83static struct scsi_host_template ahci_platform_sht = {
84 AHCI_SHT(DRV_NAME),
85};
86
87static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
88 ssize_t size)
89{
90 struct ahci_host_priv *hpriv = ap->host->private_data;
91 struct ahci_port_priv *pp = ap->private_data;
92 struct seattle_plat_data *plat_data = hpriv->plat_data;
93 unsigned long flags;
94 int pmp;
95 struct ahci_em_priv *emp;
96 u32 val;
97
98 /* get the slot number from the message */
99 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
100 if (pmp >= EM_MAX_SLOTS)
101 return -EINVAL;
102 emp = &pp->em_priv[pmp];
103
104 val = ioread32(plat_data->sgpio_ctrl);
105 if (state & ACTIVITY_MASK)
106 val |= 1 << ACTIVITY_BIT_POS((ap->port_no));
107 else
108 val &= ~(1 << ACTIVITY_BIT_POS((ap->port_no)));
109
110 if (state & LOCATE_MASK)
111 val |= 1 << LOCATE_BIT_POS((ap->port_no));
112 else
113 val &= ~(1 << LOCATE_BIT_POS((ap->port_no)));
114
115 if (state & FAULT_MASK)
116 val |= 1 << FAULT_BIT_POS((ap->port_no));
117 else
118 val &= ~(1 << FAULT_BIT_POS((ap->port_no)));
119
120 iowrite32(val, plat_data->sgpio_ctrl);
121
122 spin_lock_irqsave(ap->lock, flags);
123
124 /* save off new led state for port/slot */
125 emp->led_state = state;
126
127 spin_unlock_irqrestore(ap->lock, flags);
128
129 return size;
130}
131
132static const struct ata_port_info *ahci_seattle_get_port_info(
133 struct platform_device *pdev, struct ahci_host_priv *hpriv)
134{
135 struct device *dev = &pdev->dev;
136 struct seattle_plat_data *plat_data;
137 u32 val;
138
139 plat_data = devm_kzalloc(dev, sizeof(*plat_data), GFP_KERNEL);
140 if (!plat_data)
141 return &ahci_port_info;
142
143 plat_data->sgpio_ctrl = devm_ioremap_resource(dev,
144 platform_get_resource(pdev, IORESOURCE_MEM, 1));
145 if (IS_ERR(plat_data->sgpio_ctrl))
146 return &ahci_port_info;
147
148 val = ioread32(plat_data->sgpio_ctrl);
149
150 if (!(val & 0xf))
151 return &ahci_port_info;
152
153 hpriv->em_loc = 0;
154 hpriv->em_buf_sz = 4;
155 hpriv->em_msg_type = EM_MSG_TYPE_LED;
156 hpriv->plat_data = plat_data;
157
158 dev_info(dev, "SGPIO LED control is enabled.\n");
159 return &ahci_port_seattle_info;
160}
161
162static int ahci_seattle_probe(struct platform_device *pdev)
163{
164 int rc;
165 struct ahci_host_priv *hpriv;
166
167 hpriv = ahci_platform_get_resources(pdev, 0);
168 if (IS_ERR(hpriv))
169 return PTR_ERR(hpriv);
170
171 rc = ahci_platform_enable_resources(hpriv);
172 if (rc)
173 return rc;
174
175 rc = ahci_platform_init_host(pdev, hpriv,
176 ahci_seattle_get_port_info(pdev, hpriv),
177 &ahci_platform_sht);
178 if (rc)
179 goto disable_resources;
180
181 return 0;
182disable_resources:
183 ahci_platform_disable_resources(hpriv);
184 return rc;
185}
186
187static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
188 ahci_platform_resume);
189
190static const struct acpi_device_id ahci_acpi_match[] = {
191 { "AMDI0600", 0 },
192 {}
193};
194MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
195
196static struct platform_driver ahci_seattle_driver = {
197 .probe = ahci_seattle_probe,
198 .remove = ata_platform_remove_one,
199 .driver = {
200 .name = DRV_NAME,
201 .acpi_match_table = ahci_acpi_match,
202 .pm = &ahci_pm_ops,
203 },
204};
205module_platform_driver(ahci_seattle_driver);
206
207MODULE_DESCRIPTION("Seattle AHCI SATA platform driver");
208MODULE_AUTHOR("Brijesh Singh <brijesh.singh@amd.com>");
209MODULE_LICENSE("GPL");
210MODULE_ALIAS("platform:" DRV_NAME);
211

Warning: That file was not part of the compilation database. It may have many parsing errors.