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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * AMD Seattle AHCI SATA driver4 *5 * Copyright (c) 2015, Advanced Micro Devices6 * Author: Brijesh Singh <brijesh.singh@amd.com>7 *8 * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov9 */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 definition23 *24 * Bit Type Description25 * 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 flag30 * 6:4 RO Reserved31 * 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 0x0001000038#define LOCATE_MASK 0x0008000039#define FAULT_MASK 0x0040000040 41#define DRV_NAME "ahci-seattle"42 43static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,44 ssize_t size);45 46struct seattle_plat_data {47 void __iomem *sgpio_ctrl;48};49 50static struct ata_port_operations ahci_port_ops = {51 .inherits = &ahci_ops,52};53 54static 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 61static struct ata_port_operations ahci_seattle_ops = {62 .inherits = &ahci_ops,63 .transmit_led_message = seattle_transmit_led_message,64};65 66static 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 74static const struct scsi_host_template ahci_platform_sht = {75 AHCI_SHT(DRV_NAME),76};77 78static 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 else99 val &= ~(1 << ACTIVITY_BIT_POS((ap->port_no)));100 101 if (state & LOCATE_MASK)102 val |= 1 << LOCATE_BIT_POS((ap->port_no));103 else104 val &= ~(1 << LOCATE_BIT_POS((ap->port_no)));105 106 if (state & FAULT_MASK)107 val |= 1 << FAULT_BIT_POS((ap->port_no));108 else109 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 123static 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);131 if (!plat_data)132 return &ahci_port_info;133 134 plat_data->sgpio_ctrl = devm_platform_ioremap_resource(pdev, 1);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 152static 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, 0);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;172disable_resources:173 ahci_platform_disable_resources(hpriv);174 return rc;175}176 177static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,178 ahci_platform_resume);179 180static const struct acpi_device_id ahci_acpi_match[] = {181 { "AMDI0600", 0 },182 {}183};184MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);185 186static 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};195module_platform_driver(ahci_seattle_driver);196 197MODULE_DESCRIPTION("Seattle AHCI SATA platform driver");198MODULE_AUTHOR("Brijesh Singh <brijesh.singh@amd.com>");199MODULE_LICENSE("GPL");200MODULE_ALIAS("platform:" DRV_NAME);201