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 | |
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(lock: 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, size: 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, index: 1); |
135 | if (IS_ERR(ptr: 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 | |
157 | hpriv = ahci_platform_get_resources(pdev, flags: 0); |
158 | if (IS_ERR(ptr: hpriv)) |
159 | return PTR_ERR(ptr: 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 | pi_template: ahci_seattle_get_port_info(pdev, hpriv), |
167 | sht: &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 | |