1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * AMD Seattle AHCI SATA driver
4 *
5 * Copyright (c) 2015, Advanced Micro Devices
6 * Author: Brijesh Singh <brijesh.singh@amd.com>
7 *
8 * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
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/platform_device.h>
16 #include <linux/libata.h>
17 #include <linux/ahci_platform.h>
18 #include <linux/acpi.h>
19 #include <linux/pci_ids.h>
20 #include "ahci.h"
21
22 /* SGPIO Control Register definition
23 *
24 * Bit Type Description
25 * 31 RW OD7.2 (activity)
26 * 30 RW OD7.1 (locate)
27 * 29 RW OD7.0 (fault)
28 * 28...8 RW OD6.2...OD0.0 (3bits per port, 1 bit per LED)
29 * 7 RO SGPIO feature flag
30 * 6:4 RO Reserved
31 * 3:0 RO Number of ports (0 means no port supported)
32 */
33 #define ACTIVITY_BIT_POS(x) (8 + (3 * x))
34 #define LOCATE_BIT_POS(x) (ACTIVITY_BIT_POS(x) + 1)
35 #define FAULT_BIT_POS(x) (LOCATE_BIT_POS(x) + 1)
36
37 #define ACTIVITY_MASK 0x00010000
38 #define LOCATE_MASK 0x00080000
39 #define FAULT_MASK 0x00400000
40
41 #define DRV_NAME "ahci-seattle"
42
43 static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
44 ssize_t size);
45
46 struct seattle_plat_data {
47 void __iomem *sgpio_ctrl;
48 };
49
50 static struct ata_port_operations ahci_port_ops = {
51 .inherits = &ahci_ops,
52 };
53
54 static const struct ata_port_info ahci_port_info = {
55 .flags = AHCI_FLAG_COMMON,
56 .pio_mask = ATA_PIO4,
57 .udma_mask = ATA_UDMA6,
58 .port_ops = &ahci_port_ops,
59 };
60
61 static struct ata_port_operations ahci_seattle_ops = {
62 .inherits = &ahci_ops,
63 .transmit_led_message = seattle_transmit_led_message,
64 };
65
66 static const struct ata_port_info ahci_port_seattle_info = {
67 .flags = AHCI_FLAG_COMMON | ATA_FLAG_EM | ATA_FLAG_SW_ACTIVITY,
68 .link_flags = ATA_LFLAG_SW_ACTIVITY,
69 .pio_mask = ATA_PIO4,
70 .udma_mask = ATA_UDMA6,
71 .port_ops = &ahci_seattle_ops,
72 };
73
74 static const struct scsi_host_template ahci_platform_sht = {
75 AHCI_SHT(DRV_NAME),
76 };
77
seattle_transmit_led_message(struct ata_port * ap,u32 state,ssize_t size)78 static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
79 ssize_t size)
80 {
81 struct ahci_host_priv *hpriv = ap->host->private_data;
82 struct ahci_port_priv *pp = ap->private_data;
83 struct seattle_plat_data *plat_data = hpriv->plat_data;
84 unsigned long flags;
85 int pmp;
86 struct ahci_em_priv *emp;
87 u32 val;
88
89 /* get the slot number from the message */
90 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
91 if (pmp >= EM_MAX_SLOTS)
92 return -EINVAL;
93 emp = &pp->em_priv[pmp];
94
95 val = ioread32(plat_data->sgpio_ctrl);
96 if (state & ACTIVITY_MASK)
97 val |= 1 << ACTIVITY_BIT_POS((ap->port_no));
98 else
99 val &= ~(1 << ACTIVITY_BIT_POS((ap->port_no)));
100
101 if (state & LOCATE_MASK)
102 val |= 1 << LOCATE_BIT_POS((ap->port_no));
103 else
104 val &= ~(1 << LOCATE_BIT_POS((ap->port_no)));
105
106 if (state & FAULT_MASK)
107 val |= 1 << FAULT_BIT_POS((ap->port_no));
108 else
109 val &= ~(1 << FAULT_BIT_POS((ap->port_no)));
110
111 iowrite32(val, plat_data->sgpio_ctrl);
112
113 spin_lock_irqsave(ap->lock, flags);
114
115 /* save off new led state for port/slot */
116 emp->led_state = state;
117
118 spin_unlock_irqrestore(ap->lock, flags);
119
120 return size;
121 }
122
ahci_seattle_get_port_info(struct platform_device * pdev,struct ahci_host_priv * hpriv)123 static const struct ata_port_info *ahci_seattle_get_port_info(
124 struct platform_device *pdev, struct ahci_host_priv *hpriv)
125 {
126 struct device *dev = &pdev->dev;
127 struct seattle_plat_data *plat_data;
128 u32 val;
129
130 plat_data = devm_kzalloc(dev, sizeof(*plat_data), GFP_KERNEL);
131 if (!plat_data)
132 return &ahci_port_info;
133
134 plat_data->sgpio_ctrl = devm_platform_ioremap_resource(pdev, 1);
135 if (IS_ERR(plat_data->sgpio_ctrl))
136 return &ahci_port_info;
137
138 val = ioread32(plat_data->sgpio_ctrl);
139
140 if (!(val & 0xf))
141 return &ahci_port_info;
142
143 hpriv->em_loc = 0;
144 hpriv->em_buf_sz = 4;
145 hpriv->em_msg_type = EM_MSG_TYPE_LED;
146 hpriv->plat_data = plat_data;
147
148 dev_info(dev, "SGPIO LED control is enabled.\n");
149 return &ahci_port_seattle_info;
150 }
151
ahci_seattle_probe(struct platform_device * pdev)152 static int ahci_seattle_probe(struct platform_device *pdev)
153 {
154 int rc;
155 struct ahci_host_priv *hpriv;
156
157 hpriv = ahci_platform_get_resources(pdev, 0);
158 if (IS_ERR(hpriv))
159 return PTR_ERR(hpriv);
160
161 rc = ahci_platform_enable_resources(hpriv);
162 if (rc)
163 return rc;
164
165 rc = ahci_platform_init_host(pdev, hpriv,
166 ahci_seattle_get_port_info(pdev, hpriv),
167 &ahci_platform_sht);
168 if (rc)
169 goto disable_resources;
170
171 return 0;
172 disable_resources:
173 ahci_platform_disable_resources(hpriv);
174 return rc;
175 }
176
177 static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
178 ahci_platform_resume);
179
180 static const struct acpi_device_id ahci_acpi_match[] = {
181 { "AMDI0600", 0 },
182 {}
183 };
184 MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
185
186 static struct platform_driver ahci_seattle_driver = {
187 .probe = ahci_seattle_probe,
188 .remove_new = ata_platform_remove_one,
189 .driver = {
190 .name = DRV_NAME,
191 .acpi_match_table = ahci_acpi_match,
192 .pm = &ahci_pm_ops,
193 },
194 };
195 module_platform_driver(ahci_seattle_driver);
196
197 MODULE_DESCRIPTION("Seattle AHCI SATA platform driver");
198 MODULE_AUTHOR("Brijesh Singh <brijesh.singh@amd.com>");
199 MODULE_LICENSE("GPL");
200 MODULE_ALIAS("platform:" DRV_NAME);
201