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2504ba9f | 1 | // SPDX-License-Identifier: GPL-2.0-only |
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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 | |
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9 | */ |
10 | ||
11 | #include <linux/kernel.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/pm.h> | |
14 | #include <linux/device.h> | |
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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 | ||
25df73d9 | 74 | static const struct scsi_host_template ahci_platform_sht = { |
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75 | AHCI_SHT(DRV_NAME), |
76 | }; | |
77 | ||
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 | ||
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); | |
f52a4c74 | 131 | if (!plat_data) |
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132 | return &ahci_port_info; |
133 | ||
04fd6f56 | 134 | plat_data->sgpio_ctrl = devm_platform_ioremap_resource(pdev, 1); |
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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 | ||
152 | static int ahci_seattle_probe(struct platform_device *pdev) | |
153 | { | |
154 | int rc; | |
155 | struct ahci_host_priv *hpriv; | |
156 | ||
16af2d65 | 157 | hpriv = ahci_platform_get_resources(pdev, 0); |
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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, | |
a7eb54d4 | 188 | .remove_new = ata_platform_remove_one, |
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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); |