2 * AMD Seattle AHCI SATA driver
4 * Copyright (c) 2015, Advanced Micro Devices
5 * Author: Brijesh Singh <brijesh.singh@amd.com>
7 * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
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.
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.
19 #include <linux/kernel.h>
20 #include <linux/module.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>
31 /* SGPIO Control Register definition
33 * Bit Type Description
34 * 31 RW OD7.2 (activity)
35 * 30 RW OD7.1 (locate)
37 * 28...8 RW OD6.2...OD0.0 (3bits per port, 1 bit per LED)
38 * 7 RO SGPIO feature flag
40 * 3:0 RO Number of ports (0 means no port supported)
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)
46 #define ACTIVITY_MASK 0x00010000
47 #define LOCATE_MASK 0x00080000
48 #define FAULT_MASK 0x00400000
50 #define DRV_NAME "ahci-seattle"
52 static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
55 struct seattle_plat_data {
56 void __iomem *sgpio_ctrl;
59 static struct ata_port_operations ahci_port_ops = {
60 .inherits = &ahci_ops,
63 static const struct ata_port_info ahci_port_info = {
64 .flags = AHCI_FLAG_COMMON,
66 .udma_mask = ATA_UDMA6,
67 .port_ops = &ahci_port_ops,
70 static struct ata_port_operations ahci_seattle_ops = {
71 .inherits = &ahci_ops,
72 .transmit_led_message = seattle_transmit_led_message,
75 static 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,
79 .udma_mask = ATA_UDMA6,
80 .port_ops = &ahci_seattle_ops,
83 static struct scsi_host_template ahci_platform_sht = {
87 static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
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;
95 struct ahci_em_priv *emp;
98 /* get the slot number from the message */
99 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
100 if (pmp >= EM_MAX_SLOTS)
102 emp = &pp->em_priv[pmp];
104 val = ioread32(plat_data->sgpio_ctrl);
105 if (state & ACTIVITY_MASK)
106 val |= 1 << ACTIVITY_BIT_POS((ap->port_no));
108 val &= ~(1 << ACTIVITY_BIT_POS((ap->port_no)));
110 if (state & LOCATE_MASK)
111 val |= 1 << LOCATE_BIT_POS((ap->port_no));
113 val &= ~(1 << LOCATE_BIT_POS((ap->port_no)));
115 if (state & FAULT_MASK)
116 val |= 1 << FAULT_BIT_POS((ap->port_no));
118 val &= ~(1 << FAULT_BIT_POS((ap->port_no)));
120 iowrite32(val, plat_data->sgpio_ctrl);
122 spin_lock_irqsave(ap->lock, flags);
124 /* save off new led state for port/slot */
125 emp->led_state = state;
127 spin_unlock_irqrestore(ap->lock, flags);
132 static const struct ata_port_info *ahci_seattle_get_port_info(
133 struct platform_device *pdev, struct ahci_host_priv *hpriv)
135 struct device *dev = &pdev->dev;
136 struct seattle_plat_data *plat_data;
139 plat_data = devm_kzalloc(dev, sizeof(*plat_data), GFP_KERNEL);
141 return &ahci_port_info;
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;
148 val = ioread32(plat_data->sgpio_ctrl);
151 return &ahci_port_info;
154 hpriv->em_buf_sz = 4;
155 hpriv->em_msg_type = EM_MSG_TYPE_LED;
156 hpriv->plat_data = plat_data;
158 dev_info(dev, "SGPIO LED control is enabled.\n");
159 return &ahci_port_seattle_info;
162 static int ahci_seattle_probe(struct platform_device *pdev)
165 struct ahci_host_priv *hpriv;
167 hpriv = ahci_platform_get_resources(pdev, 0);
169 return PTR_ERR(hpriv);
171 rc = ahci_platform_enable_resources(hpriv);
175 rc = ahci_platform_init_host(pdev, hpriv,
176 ahci_seattle_get_port_info(pdev, hpriv),
179 goto disable_resources;
183 ahci_platform_disable_resources(hpriv);
187 static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
188 ahci_platform_resume);
190 static const struct acpi_device_id ahci_acpi_match[] = {
194 MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
196 static struct platform_driver ahci_seattle_driver = {
197 .probe = ahci_seattle_probe,
198 .remove = ata_platform_remove_one,
201 .acpi_match_table = ahci_acpi_match,
205 module_platform_driver(ahci_seattle_driver);
207 MODULE_DESCRIPTION("Seattle AHCI SATA platform driver");
208 MODULE_AUTHOR("Brijesh Singh <brijesh.singh@amd.com>");
209 MODULE_LICENSE("GPL");
210 MODULE_ALIAS("platform:" DRV_NAME);