// SPDX-License-Identifier: GPL-2.0-only
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/*
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* AMD Seattle AHCI SATA driver
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*
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* Copyright (c) 2015, Advanced Micro Devices
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* Author: Brijesh Singh <brijesh.singh@amd.com>
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*
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* based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pm.h>
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#include <linux/device.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/libata.h>
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#include <linux/ahci_platform.h>
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#include <linux/acpi.h>
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#include <linux/pci_ids.h>
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#include "ahci.h"
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/* SGPIO Control Register definition
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*
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* Bit Type Description
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* 31 RW OD7.2 (activity)
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* 30 RW OD7.1 (locate)
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* 29 RW OD7.0 (fault)
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* 28...8 RW OD6.2...OD0.0 (3bits per port, 1 bit per LED)
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* 7 RO SGPIO feature flag
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* 6:4 RO Reserved
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* 3:0 RO Number of ports (0 means no port supported)
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*/
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#define ACTIVITY_BIT_POS(x) (8 + (3 * x))
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#define LOCATE_BIT_POS(x) (ACTIVITY_BIT_POS(x) + 1)
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#define FAULT_BIT_POS(x) (LOCATE_BIT_POS(x) + 1)
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#define ACTIVITY_MASK 0x00010000
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#define LOCATE_MASK 0x00080000
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#define FAULT_MASK 0x00400000
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#define DRV_NAME "ahci-seattle"
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static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
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ssize_t size);
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struct seattle_plat_data {
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void __iomem *sgpio_ctrl;
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};
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static struct ata_port_operations ahci_port_ops = {
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.inherits = &ahci_ops,
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};
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static const struct ata_port_info ahci_port_info = {
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.flags = AHCI_FLAG_COMMON,
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.pio_mask = ATA_PIO4,
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.udma_mask = ATA_UDMA6,
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.port_ops = &ahci_port_ops,
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};
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static struct ata_port_operations ahci_seattle_ops = {
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.inherits = &ahci_ops,
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.transmit_led_message = seattle_transmit_led_message,
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};
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static const struct ata_port_info ahci_port_seattle_info = {
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.flags = AHCI_FLAG_COMMON | ATA_FLAG_EM | ATA_FLAG_SW_ACTIVITY,
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.link_flags = ATA_LFLAG_SW_ACTIVITY,
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.pio_mask = ATA_PIO4,
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.udma_mask = ATA_UDMA6,
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.port_ops = &ahci_seattle_ops,
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};
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static struct scsi_host_template ahci_platform_sht = {
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AHCI_SHT(DRV_NAME),
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};
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static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
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ssize_t size)
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{
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struct ahci_host_priv *hpriv = ap->host->private_data;
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struct ahci_port_priv *pp = ap->private_data;
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struct seattle_plat_data *plat_data = hpriv->plat_data;
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unsigned long flags;
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int pmp;
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struct ahci_em_priv *emp;
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u32 val;
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/* get the slot number from the message */
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pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
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if (pmp >= EM_MAX_SLOTS)
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return -EINVAL;
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emp = &pp->em_priv[pmp];
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val = ioread32(plat_data->sgpio_ctrl);
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if (state & ACTIVITY_MASK)
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val |= 1 << ACTIVITY_BIT_POS((ap->port_no));
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else
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val &= ~(1 << ACTIVITY_BIT_POS((ap->port_no)));
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if (state & LOCATE_MASK)
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val |= 1 << LOCATE_BIT_POS((ap->port_no));
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else
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val &= ~(1 << LOCATE_BIT_POS((ap->port_no)));
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if (state & FAULT_MASK)
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val |= 1 << FAULT_BIT_POS((ap->port_no));
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else
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val &= ~(1 << FAULT_BIT_POS((ap->port_no)));
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iowrite32(val, plat_data->sgpio_ctrl);
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spin_lock_irqsave(ap->lock, flags);
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/* save off new led state for port/slot */
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emp->led_state = state;
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spin_unlock_irqrestore(ap->lock, flags);
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return size;
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}
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static const struct ata_port_info *ahci_seattle_get_port_info(
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struct platform_device *pdev, struct ahci_host_priv *hpriv)
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{
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struct device *dev = &pdev->dev;
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struct seattle_plat_data *plat_data;
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u32 val;
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plat_data = devm_kzalloc(dev, sizeof(*plat_data), GFP_KERNEL);
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if (!plat_data)
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return &ahci_port_info;
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plat_data->sgpio_ctrl = devm_ioremap_resource(dev,
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platform_get_resource(pdev, IORESOURCE_MEM, 1));
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if (IS_ERR(plat_data->sgpio_ctrl))
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return &ahci_port_info;
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val = ioread32(plat_data->sgpio_ctrl);
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if (!(val & 0xf))
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return &ahci_port_info;
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hpriv->em_loc = 0;
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hpriv->em_buf_sz = 4;
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hpriv->em_msg_type = EM_MSG_TYPE_LED;
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hpriv->plat_data = plat_data;
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dev_info(dev, "SGPIO LED control is enabled.\n");
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return &ahci_port_seattle_info;
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}
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static int ahci_seattle_probe(struct platform_device *pdev)
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{
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int rc;
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struct ahci_host_priv *hpriv;
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hpriv = ahci_platform_get_resources(pdev, 0);
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if (IS_ERR(hpriv))
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return PTR_ERR(hpriv);
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rc = ahci_platform_enable_resources(hpriv);
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if (rc)
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return rc;
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rc = ahci_platform_init_host(pdev, hpriv,
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ahci_seattle_get_port_info(pdev, hpriv),
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&ahci_platform_sht);
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if (rc)
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goto disable_resources;
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return 0;
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disable_resources:
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ahci_platform_disable_resources(hpriv);
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return rc;
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}
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static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
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ahci_platform_resume);
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static const struct acpi_device_id ahci_acpi_match[] = {
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{ "AMDI0600", 0 },
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{}
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};
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MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
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static struct platform_driver ahci_seattle_driver = {
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.probe = ahci_seattle_probe,
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.remove = ata_platform_remove_one,
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.driver = {
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.name = DRV_NAME,
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.acpi_match_table = ahci_acpi_match,
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.pm = &ahci_pm_ops,
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},
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};
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module_platform_driver(ahci_seattle_driver);
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MODULE_DESCRIPTION("Seattle AHCI SATA platform driver");
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MODULE_AUTHOR("Brijesh Singh <brijesh.singh@amd.com>");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:" DRV_NAME);
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