1 // SPDX-License-Identifier: GPL-2.0-only
3 * AMD Seattle AHCI SATA driver
5 * Copyright (c) 2015, Advanced Micro Devices
6 * Author: Brijesh Singh <brijesh.singh@amd.com>
8 * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
11 #include <linux/kernel.h>
12 #include <linux/module.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>
22 /* SGPIO Control Register definition
24 * Bit Type Description
25 * 31 RW OD7.2 (activity)
26 * 30 RW OD7.1 (locate)
28 * 28...8 RW OD6.2...OD0.0 (3bits per port, 1 bit per LED)
29 * 7 RO SGPIO feature flag
31 * 3:0 RO Number of ports (0 means no port supported)
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)
37 #define ACTIVITY_MASK 0x00010000
38 #define LOCATE_MASK 0x00080000
39 #define FAULT_MASK 0x00400000
41 #define DRV_NAME "ahci-seattle"
43 static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
46 struct seattle_plat_data {
47 void __iomem *sgpio_ctrl;
50 static struct ata_port_operations ahci_port_ops = {
51 .inherits = &ahci_ops,
54 static const struct ata_port_info ahci_port_info = {
55 .flags = AHCI_FLAG_COMMON,
57 .udma_mask = ATA_UDMA6,
58 .port_ops = &ahci_port_ops,
61 static struct ata_port_operations ahci_seattle_ops = {
62 .inherits = &ahci_ops,
63 .transmit_led_message = seattle_transmit_led_message,
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,
70 .udma_mask = ATA_UDMA6,
71 .port_ops = &ahci_seattle_ops,
74 static const struct scsi_host_template ahci_platform_sht = {
78 static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
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;
86 struct ahci_em_priv *emp;
89 /* get the slot number from the message */
90 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
91 if (pmp >= EM_MAX_SLOTS)
93 emp = &pp->em_priv[pmp];
95 val = ioread32(plat_data->sgpio_ctrl);
96 if (state & ACTIVITY_MASK)
97 val |= 1 << ACTIVITY_BIT_POS((ap->port_no));
99 val &= ~(1 << ACTIVITY_BIT_POS((ap->port_no)));
101 if (state & LOCATE_MASK)
102 val |= 1 << LOCATE_BIT_POS((ap->port_no));
104 val &= ~(1 << LOCATE_BIT_POS((ap->port_no)));
106 if (state & FAULT_MASK)
107 val |= 1 << FAULT_BIT_POS((ap->port_no));
109 val &= ~(1 << FAULT_BIT_POS((ap->port_no)));
111 iowrite32(val, plat_data->sgpio_ctrl);
113 spin_lock_irqsave(ap->lock, flags);
115 /* save off new led state for port/slot */
116 emp->led_state = state;
118 spin_unlock_irqrestore(ap->lock, flags);
123 static const struct ata_port_info *ahci_seattle_get_port_info(
124 struct platform_device *pdev, struct ahci_host_priv *hpriv)
126 struct device *dev = &pdev->dev;
127 struct seattle_plat_data *plat_data;
130 plat_data = devm_kzalloc(dev, sizeof(*plat_data), GFP_KERNEL);
132 return &ahci_port_info;
134 plat_data->sgpio_ctrl = devm_platform_ioremap_resource(pdev, 1);
135 if (IS_ERR(plat_data->sgpio_ctrl))
136 return &ahci_port_info;
138 val = ioread32(plat_data->sgpio_ctrl);
141 return &ahci_port_info;
144 hpriv->em_buf_sz = 4;
145 hpriv->em_msg_type = EM_MSG_TYPE_LED;
146 hpriv->plat_data = plat_data;
148 dev_info(dev, "SGPIO LED control is enabled.\n");
149 return &ahci_port_seattle_info;
152 static int ahci_seattle_probe(struct platform_device *pdev)
155 struct ahci_host_priv *hpriv;
157 hpriv = ahci_platform_get_resources(pdev, 0);
159 return PTR_ERR(hpriv);
161 rc = ahci_platform_enable_resources(hpriv);
165 rc = ahci_platform_init_host(pdev, hpriv,
166 ahci_seattle_get_port_info(pdev, hpriv),
169 goto disable_resources;
173 ahci_platform_disable_resources(hpriv);
177 static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
178 ahci_platform_resume);
180 static const struct acpi_device_id ahci_acpi_match[] = {
184 MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
186 static struct platform_driver ahci_seattle_driver = {
187 .probe = ahci_seattle_probe,
188 .remove_new = ata_platform_remove_one,
191 .acpi_match_table = ahci_acpi_match,
195 module_platform_driver(ahci_seattle_driver);
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);