[linux-block.git] / drivers / ata / ahci_seattle.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * AMD Seattle AHCI SATA driver
 *
 * Copyright (c) 2015, Advanced Micro Devices
 * Author: Brijesh Singh <brijesh.singh@amd.com>
 *
 * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/device.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/libata.h>
#include <linux/ahci_platform.h>
#include <linux/acpi.h>
#include <linux/pci_ids.h>
#include "ahci.h"

/* SGPIO Control Register definition
 *
 * Bit		Type		Description
 * 31		RW		OD7.2 (activity)
 * 30		RW		OD7.1 (locate)
 * 29		RW		OD7.0 (fault)
 * 28...8	RW		OD6.2...OD0.0 (3bits per port, 1 bit per LED)
 * 7		RO		SGPIO feature flag
 * 6:4		RO		Reserved
 * 3:0		RO		Number of ports (0 means no port supported)
 */
#define ACTIVITY_BIT_POS(x)		(8 + (3 * x))
#define LOCATE_BIT_POS(x)		(ACTIVITY_BIT_POS(x) + 1)
#define FAULT_BIT_POS(x)		(LOCATE_BIT_POS(x) + 1)

#define ACTIVITY_MASK			0x00010000
#define LOCATE_MASK			0x00080000
#define FAULT_MASK			0x00400000

#define DRV_NAME "ahci-seattle"

static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
					    ssize_t size);

struct seattle_plat_data {
	void __iomem *sgpio_ctrl;
};

static struct ata_port_operations ahci_port_ops = {
	.inherits		= &ahci_ops,
};

static const struct ata_port_info ahci_port_info = {
	.flags		= AHCI_FLAG_COMMON,
	.pio_mask	= ATA_PIO4,
	.udma_mask	= ATA_UDMA6,
	.port_ops	= &ahci_port_ops,
};

static struct ata_port_operations ahci_seattle_ops = {
	.inherits		= &ahci_ops,
	.transmit_led_message   = seattle_transmit_led_message,
};

static const struct ata_port_info ahci_port_seattle_info = {
	.flags		= AHCI_FLAG_COMMON | ATA_FLAG_EM | ATA_FLAG_SW_ACTIVITY,
	.link_flags	= ATA_LFLAG_SW_ACTIVITY,
	.pio_mask	= ATA_PIO4,
	.udma_mask	= ATA_UDMA6,
	.port_ops	= &ahci_seattle_ops,
};

static const struct scsi_host_template ahci_platform_sht = {
	AHCI_SHT(DRV_NAME),
};

static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
					    ssize_t size)
{
	struct ahci_host_priv *hpriv = ap->host->private_data;
	struct ahci_port_priv *pp = ap->private_data;
	struct seattle_plat_data *plat_data = hpriv->plat_data;
	unsigned long flags;
	int pmp;
	struct ahci_em_priv *emp;
	u32 val;

	/* get the slot number from the message */
	pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
	if (pmp >= EM_MAX_SLOTS)
		return -EINVAL;
	emp = &pp->em_priv[pmp];

	val = ioread32(plat_data->sgpio_ctrl);
	if (state & ACTIVITY_MASK)
		val |= 1 << ACTIVITY_BIT_POS((ap->port_no));
	else
		val &= ~(1 << ACTIVITY_BIT_POS((ap->port_no)));

	if (state & LOCATE_MASK)
		val |= 1 << LOCATE_BIT_POS((ap->port_no));
	else
		val &= ~(1 << LOCATE_BIT_POS((ap->port_no)));

	if (state & FAULT_MASK)
		val |= 1 << FAULT_BIT_POS((ap->port_no));
	else
		val &= ~(1 << FAULT_BIT_POS((ap->port_no)));

	iowrite32(val, plat_data->sgpio_ctrl);

	spin_lock_irqsave(ap->lock, flags);

	/* save off new led state for port/slot */
	emp->led_state = state;

	spin_unlock_irqrestore(ap->lock, flags);

	return size;
}

static const struct ata_port_info *ahci_seattle_get_port_info(
		struct platform_device *pdev, struct ahci_host_priv *hpriv)
{
	struct device *dev = &pdev->dev;
	struct seattle_plat_data *plat_data;
	u32 val;

	plat_data = devm_kzalloc(dev, sizeof(*plat_data), GFP_KERNEL);
	if (!plat_data)
		return &ahci_port_info;

	plat_data->sgpio_ctrl = devm_ioremap_resource(dev,
			      platform_get_resource(pdev, IORESOURCE_MEM, 1));
	if (IS_ERR(plat_data->sgpio_ctrl))
		return &ahci_port_info;

	val = ioread32(plat_data->sgpio_ctrl);

	if (!(val & 0xf))
		return &ahci_port_info;

	hpriv->em_loc = 0;
	hpriv->em_buf_sz = 4;
	hpriv->em_msg_type = EM_MSG_TYPE_LED;
	hpriv->plat_data = plat_data;

	dev_info(dev, "SGPIO LED control is enabled.\n");
	return &ahci_port_seattle_info;
}

static int ahci_seattle_probe(struct platform_device *pdev)
{
	int rc;
	struct ahci_host_priv *hpriv;

	hpriv = ahci_platform_get_resources(pdev, 0);
	if (IS_ERR(hpriv))
		return PTR_ERR(hpriv);

	rc = ahci_platform_enable_resources(hpriv);
	if (rc)
		return rc;

	rc = ahci_platform_init_host(pdev, hpriv,
				     ahci_seattle_get_port_info(pdev, hpriv),
				     &ahci_platform_sht);
	if (rc)
		goto disable_resources;

	return 0;
disable_resources:
	ahci_platform_disable_resources(hpriv);
	return rc;
}

static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
			 ahci_platform_resume);

static const struct acpi_device_id ahci_acpi_match[] = {
	{ "AMDI0600", 0 },
	{}
};
MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);

static struct platform_driver ahci_seattle_driver = {
	.probe = ahci_seattle_probe,
	.remove = ata_platform_remove_one,
	.driver = {
		.name = DRV_NAME,
		.acpi_match_table = ahci_acpi_match,
		.pm = &ahci_pm_ops,
	},
};
module_platform_driver(ahci_seattle_driver);

MODULE_DESCRIPTION("Seattle AHCI SATA platform driver");
MODULE_AUTHOR("Brijesh Singh <brijesh.singh@amd.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
Commit	Line	Data
2504ba9f	1	// SPDX-License-Identifier: GPL-2.0-only
535dac4a BS	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
535dac4a BS	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/of_device.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/libata.h>
	18	#include <linux/ahci_platform.h>
	19	#include <linux/acpi.h>
	20	#include <linux/pci_ids.h>
	21	#include "ahci.h"
	22
	23	/* SGPIO Control Register definition
	24	*
	25	* Bit Type Description
	26	* 31 RW OD7.2 (activity)
	27	* 30 RW OD7.1 (locate)
	28	* 29 RW OD7.0 (fault)
	29	* 28...8 RW OD6.2...OD0.0 (3bits per port, 1 bit per LED)
	30	* 7 RO SGPIO feature flag
	31	* 6:4 RO Reserved
	32	* 3:0 RO Number of ports (0 means no port supported)
	33	*/
	34	#define ACTIVITY_BIT_POS(x) (8 + (3 * x))
	35	#define LOCATE_BIT_POS(x) (ACTIVITY_BIT_POS(x) + 1)
	36	#define FAULT_BIT_POS(x) (LOCATE_BIT_POS(x) + 1)
	37
	38	#define ACTIVITY_MASK 0x00010000
	39	#define LOCATE_MASK 0x00080000
	40	#define FAULT_MASK 0x00400000
	41
	42	#define DRV_NAME "ahci-seattle"
	43
	44	static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
	45	ssize_t size);
	46
	47	struct seattle_plat_data {
	48	void __iomem *sgpio_ctrl;
	49	};
	50
	51	static struct ata_port_operations ahci_port_ops = {
	52	.inherits = &ahci_ops,
	53	};
	54
	55	static const struct ata_port_info ahci_port_info = {
	56	.flags = AHCI_FLAG_COMMON,
	57	.pio_mask = ATA_PIO4,
	58	.udma_mask = ATA_UDMA6,
	59	.port_ops = &ahci_port_ops,
	60	};
	61
	62	static struct ata_port_operations ahci_seattle_ops = {
	63	.inherits = &ahci_ops,
	64	.transmit_led_message = seattle_transmit_led_message,
	65	};
	66
	67	static const struct ata_port_info ahci_port_seattle_info = {
	68	.flags = AHCI_FLAG_COMMON \| ATA_FLAG_EM \| ATA_FLAG_SW_ACTIVITY,
	69	.link_flags = ATA_LFLAG_SW_ACTIVITY,
	70	.pio_mask = ATA_PIO4,
	71	.udma_mask = ATA_UDMA6,
	72	.port_ops = &ahci_seattle_ops,
73	};
74
25df73d9	75	static const struct scsi_host_template ahci_platform_sht = {
535dac4a BS	76	AHCI_SHT(DRV_NAME),
	77	};
	78
	79	static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
	80	ssize_t size)
	81	{
	82	struct ahci_host_priv *hpriv = ap->host->private_data;
	83	struct ahci_port_priv *pp = ap->private_data;
	84	struct seattle_plat_data *plat_data = hpriv->plat_data;
	85	unsigned long flags;
	86	int pmp;
	87	struct ahci_em_priv *emp;
	88	u32 val;
	89
	90	/* get the slot number from the message */
	91	pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
	92	if (pmp >= EM_MAX_SLOTS)
	93	return -EINVAL;
	94	emp = &pp->em_priv[pmp];
	95
	96	val = ioread32(plat_data->sgpio_ctrl);
	97	if (state & ACTIVITY_MASK)
	98	val \|= 1 << ACTIVITY_BIT_POS((ap->port_no));
	99	else
	100	val &= ~(1 << ACTIVITY_BIT_POS((ap->port_no)));
	101
	102	if (state & LOCATE_MASK)
	103	val \|= 1 << LOCATE_BIT_POS((ap->port_no));
	104	else
	105	val &= ~(1 << LOCATE_BIT_POS((ap->port_no)));
	106
	107	if (state & FAULT_MASK)
	108	val \|= 1 << FAULT_BIT_POS((ap->port_no));
	109	else
	110	val &= ~(1 << FAULT_BIT_POS((ap->port_no)));
	111
	112	iowrite32(val, plat_data->sgpio_ctrl);
	113
	114	spin_lock_irqsave(ap->lock, flags);
	115
	116	/* save off new led state for port/slot */
	117	emp->led_state = state;
	118
	119	spin_unlock_irqrestore(ap->lock, flags);
	120
	121	return size;
	122	}
	123
	124	static const struct ata_port_info *ahci_seattle_get_port_info(
	125	struct platform_device pdev, struct ahci_host_priv hpriv)
	126	{
	127	struct device *dev = &pdev->dev;
	128	struct seattle_plat_data *plat_data;
	129	u32 val;
	130
	131	plat_data = devm_kzalloc(dev, sizeof(*plat_data), GFP_KERNEL);
f52a4c74	132	if (!plat_data)
535dac4a BS	133	return &ahci_port_info;
	134
	135	plat_data->sgpio_ctrl = devm_ioremap_resource(dev,
	136	platform_get_resource(pdev, IORESOURCE_MEM, 1));
	137	if (IS_ERR(plat_data->sgpio_ctrl))
	138	return &ahci_port_info;
	139
	140	val = ioread32(plat_data->sgpio_ctrl);
	141
	142	if (!(val & 0xf))
	143	return &ahci_port_info;
	144
	145	hpriv->em_loc = 0;
	146	hpriv->em_buf_sz = 4;
	147	hpriv->em_msg_type = EM_MSG_TYPE_LED;
	148	hpriv->plat_data = plat_data;
	149
	150	dev_info(dev, "SGPIO LED control is enabled.\n");
	151	return &ahci_port_seattle_info;
	152	}
	153
	154	static int ahci_seattle_probe(struct platform_device *pdev)
	155	{
	156	int rc;
	157	struct ahci_host_priv *hpriv;
	158
16af2d65	159	hpriv = ahci_platform_get_resources(pdev, 0);
535dac4a BS	160	if (IS_ERR(hpriv))
	161	return PTR_ERR(hpriv);
	162
	163	rc = ahci_platform_enable_resources(hpriv);
	164	if (rc)
	165	return rc;
	166
	167	rc = ahci_platform_init_host(pdev, hpriv,
	168	ahci_seattle_get_port_info(pdev, hpriv),
	169	&ahci_platform_sht);
	170	if (rc)
	171	goto disable_resources;
	172
	173	return 0;
	174	disable_resources:
	175	ahci_platform_disable_resources(hpriv);
	176	return rc;
	177	}
	178
	179	static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
	180	ahci_platform_resume);
	181
	182	static const struct acpi_device_id ahci_acpi_match[] = {
	183	{ "AMDI0600", 0 },
	184	{}
	185	};
	186	MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
	187
	188	static struct platform_driver ahci_seattle_driver = {
	189	.probe = ahci_seattle_probe,
	190	.remove = ata_platform_remove_one,
	191	.driver = {
	192	.name = DRV_NAME,
	193	.acpi_match_table = ahci_acpi_match,
	194	.pm = &ahci_pm_ops,
	195	},
	196	};
	197	module_platform_driver(ahci_seattle_driver);
	198
	199	MODULE_DESCRIPTION("Seattle AHCI SATA platform driver");
	200	MODULE_AUTHOR("Brijesh Singh <brijesh.singh@amd.com>");
	201	MODULE_LICENSE("GPL");
	202	MODULE_ALIAS("platform:" DRV_NAME);