[deliverable/linux.git] / drivers / ata / ahci_seattle.c

/*
 * 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
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#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 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 (IS_ERR(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);
	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
535dac4a BS	1	/*
	2	* AMD Seattle AHCI SATA driver
	3	*
	4	* Copyright (c) 2015, Advanced Micro Devices
	5	* Author: Brijesh Singh <brijesh.singh@amd.com>
	6	*
	7	* based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
	8	*
	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.
	12	*
	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.
	17	*/
	18
	19	#include <linux/kernel.h>
	20	#include <linux/module.h>
	21	#include <linux/pm.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>
	29	#include "ahci.h"
	30
	31	/* SGPIO Control Register definition
	32	*
	33	* Bit Type Description
	34	* 31 RW OD7.2 (activity)
	35	* 30 RW OD7.1 (locate)
	36	* 29 RW OD7.0 (fault)
	37	* 28...8 RW OD6.2...OD0.0 (3bits per port, 1 bit per LED)
	38	* 7 RO SGPIO feature flag
	39	* 6:4 RO Reserved
	40	* 3:0 RO Number of ports (0 means no port supported)
	41	*/
	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)
	45
	46	#define ACTIVITY_MASK 0x00010000
	47	#define LOCATE_MASK 0x00080000
	48	#define FAULT_MASK 0x00400000
	49
	50	#define DRV_NAME "ahci-seattle"
	51
	52	static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
	53	ssize_t size);
	54
	55	struct seattle_plat_data {
	56	void __iomem *sgpio_ctrl;
	57	};
	58
	59	static struct ata_port_operations ahci_port_ops = {
	60	.inherits = &ahci_ops,
	61	};
	62
	63	static const struct ata_port_info ahci_port_info = {
	64	.flags = AHCI_FLAG_COMMON,
65	.pio_mask = ATA_PIO4,
66	.udma_mask = ATA_UDMA6,
67	.port_ops = &ahci_port_ops,
68	};
69
70	static struct ata_port_operations ahci_seattle_ops = {
71	.inherits = &ahci_ops,
72	.transmit_led_message = seattle_transmit_led_message,
73	};
74
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,
78	.pio_mask = ATA_PIO4,
79	.udma_mask = ATA_UDMA6,
80	.port_ops = &ahci_seattle_ops,
81	};
82
83	static struct scsi_host_template ahci_platform_sht = {
84	AHCI_SHT(DRV_NAME),
85	};
86
87	static ssize_t seattle_transmit_led_message(struct ata_port *ap, u32 state,
88	ssize_t size)
89	{
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;
93	unsigned long flags;
94	int pmp;
95	struct ahci_em_priv *emp;
96	u32 val;
97
98	/* get the slot number from the message */
99	pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
100	if (pmp >= EM_MAX_SLOTS)
101	return -EINVAL;
102	emp = &pp->em_priv[pmp];
103
104	val = ioread32(plat_data->sgpio_ctrl);
105	if (state & ACTIVITY_MASK)
106	val \|= 1 << ACTIVITY_BIT_POS((ap->port_no));
107	else
108	val &= ~(1 << ACTIVITY_BIT_POS((ap->port_no)));
109
110	if (state & LOCATE_MASK)
111	val \|= 1 << LOCATE_BIT_POS((ap->port_no));
112	else
113	val &= ~(1 << LOCATE_BIT_POS((ap->port_no)));
114
115	if (state & FAULT_MASK)
116	val \|= 1 << FAULT_BIT_POS((ap->port_no));
117	else
118	val &= ~(1 << FAULT_BIT_POS((ap->port_no)));
119
120	iowrite32(val, plat_data->sgpio_ctrl);
121
122	spin_lock_irqsave(ap->lock, flags);
123
124	/* save off new led state for port/slot */
125	emp->led_state = state;
126
127	spin_unlock_irqrestore(ap->lock, flags);
128
129	return size;
130	}
131
132	static const struct ata_port_info *ahci_seattle_get_port_info(
133	struct platform_device pdev, struct ahci_host_priv hpriv)
134	{
135	struct device *dev = &pdev->dev;
136	struct seattle_plat_data *plat_data;
137	u32 val;
138
139	plat_data = devm_kzalloc(dev, sizeof(*plat_data), GFP_KERNEL);
140	if (IS_ERR(plat_data))
141	return &ahci_port_info;
142
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;
147
148	val = ioread32(plat_data->sgpio_ctrl);
149
150	if (!(val & 0xf))
151	return &ahci_port_info;
152
153	hpriv->em_loc = 0;
154	hpriv->em_buf_sz = 4;
155	hpriv->em_msg_type = EM_MSG_TYPE_LED;
156	hpriv->plat_data = plat_data;
157
158	dev_info(dev, "SGPIO LED control is enabled.\n");
159	return &ahci_port_seattle_info;
160	}
161
162	static int ahci_seattle_probe(struct platform_device *pdev)
163	{
164	int rc;
165	struct ahci_host_priv *hpriv;
166
167	hpriv = ahci_platform_get_resources(pdev);
168	if (IS_ERR(hpriv))
169	return PTR_ERR(hpriv);
170
171	rc = ahci_platform_enable_resources(hpriv);
172	if (rc)
173	return rc;
174
175	rc = ahci_platform_init_host(pdev, hpriv,
176	ahci_seattle_get_port_info(pdev, hpriv),
177	&ahci_platform_sht);
178	if (rc)
179	goto disable_resources;
180
181	return 0;
182	disable_resources:
183	ahci_platform_disable_resources(hpriv);
184	return rc;
185	}
186
187	static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
188	ahci_platform_resume);
189
190	static const struct acpi_device_id ahci_acpi_match[] = {
191	{ "AMDI0600", 0 },
192	{}
193	};
194	MODULE_DEVICE_TABLE(acpi, ahci_acpi_match);
195
196	static struct platform_driver ahci_seattle_driver = {
197	.probe = ahci_seattle_probe,
198	.remove = ata_platform_remove_one,
199	.driver = {
200	.name = DRV_NAME,
201	.acpi_match_table = ahci_acpi_match,
202	.pm = &ahci_pm_ops,
203	},
204	};
205	module_platform_driver(ahci_seattle_driver);
206
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);