[mirror_ubuntu-artful-kernel.git] / drivers / scsi / ufs / tc-dwc-g210-pci.c

/*
 * Synopsys G210 Test Chip driver
 *
 * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
 *
 * Authors: Joao Pinto <jpinto@synopsys.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include "ufshcd.h"
#include "ufshcd-dwc.h"
#include "tc-dwc-g210.h"

#include <linux/pci.h>
#include <linux/pm_runtime.h>

/* Test Chip type expected values */
#define TC_G210_20BIT 20
#define TC_G210_40BIT 40
#define TC_G210_INV 0

static int tc_type = TC_G210_INV;
module_param(tc_type, int, 0);
MODULE_PARM_DESC(tc_type, "Test Chip Type (20 = 20-bit, 40 = 40-bit)");

static int tc_dwc_g210_pci_suspend(struct device *dev)
{
	return ufshcd_system_suspend(dev_get_drvdata(dev));
}

static int tc_dwc_g210_pci_resume(struct device *dev)
{
	return ufshcd_system_resume(dev_get_drvdata(dev));
}

static int tc_dwc_g210_pci_runtime_suspend(struct device *dev)
{
	return ufshcd_runtime_suspend(dev_get_drvdata(dev));
}

static int tc_dwc_g210_pci_runtime_resume(struct device *dev)
{
	return ufshcd_runtime_resume(dev_get_drvdata(dev));
}

static int tc_dwc_g210_pci_runtime_idle(struct device *dev)
{
	return ufshcd_runtime_idle(dev_get_drvdata(dev));
}

/**
 * struct ufs_hba_dwc_vops - UFS DWC specific variant operations
 */
static struct ufs_hba_variant_ops tc_dwc_g210_pci_hba_vops = {
	.name                   = "tc-dwc-g210-pci",
	.link_startup_notify	= ufshcd_dwc_link_startup_notify,
};

/**
 * tc_dwc_g210_pci_shutdown - main function to put the controller in reset state
 * @pdev: pointer to PCI device handle
 */
static void tc_dwc_g210_pci_shutdown(struct pci_dev *pdev)
{
	ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
}

/**
 * tc_dwc_g210_pci_remove - de-allocate PCI/SCSI host and host memory space
 *		data structure memory
 * @pdev - pointer to PCI handle
 */
static void tc_dwc_g210_pci_remove(struct pci_dev *pdev)
{
	struct ufs_hba *hba = pci_get_drvdata(pdev);

	pm_runtime_forbid(&pdev->dev);
	pm_runtime_get_noresume(&pdev->dev);
	ufshcd_remove(hba);
}

/**
 * tc_dwc_g210_pci_probe - probe routine of the driver
 * @pdev: pointer to PCI device handle
 * @id: PCI device id
 *
 * Returns 0 on success, non-zero value on failure
 */
static int
tc_dwc_g210_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
	struct ufs_hba *hba;
	void __iomem *mmio_base;
	int err;

	/* Check Test Chip type and set the specific setup routine */
	if (tc_type == TC_G210_20BIT) {
		tc_dwc_g210_pci_hba_vops.phy_initialization =
						tc_dwc_g210_config_20_bit;
	} else if (tc_type == TC_G210_40BIT) {
		tc_dwc_g210_pci_hba_vops.phy_initialization =
						tc_dwc_g210_config_40_bit;
	} else {
		dev_err(&pdev->dev, "test chip version not specified\n");
		return -EPERM;
	}

	err = pcim_enable_device(pdev);
	if (err) {
		dev_err(&pdev->dev, "pcim_enable_device failed\n");
		return err;
	}

	pci_set_master(pdev);

	err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD);
	if (err < 0) {
		dev_err(&pdev->dev, "request and iomap failed\n");
		return err;
	}

	mmio_base = pcim_iomap_table(pdev)[0];

	err = ufshcd_alloc_host(&pdev->dev, &hba);
	if (err) {
		dev_err(&pdev->dev, "Allocation failed\n");
		return err;
	}

	hba->vops = &tc_dwc_g210_pci_hba_vops;

	err = ufshcd_init(hba, mmio_base, pdev->irq);
	if (err) {
		dev_err(&pdev->dev, "Initialization failed\n");
		return err;
	}

	pci_set_drvdata(pdev, hba);
	pm_runtime_put_noidle(&pdev->dev);
	pm_runtime_allow(&pdev->dev);

	return 0;
}

static const struct dev_pm_ops tc_dwc_g210_pci_pm_ops = {
	.suspend	= tc_dwc_g210_pci_suspend,
	.resume		= tc_dwc_g210_pci_resume,
	.runtime_suspend = tc_dwc_g210_pci_runtime_suspend,
	.runtime_resume  = tc_dwc_g210_pci_runtime_resume,
	.runtime_idle    = tc_dwc_g210_pci_runtime_idle,
};

static const struct pci_device_id tc_dwc_g210_pci_tbl[] = {
	{ PCI_VENDOR_ID_SYNOPSYS, 0xB101, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
	{ PCI_VENDOR_ID_SYNOPSYS, 0xB102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
	{ }	/* terminate list */
};

MODULE_DEVICE_TABLE(pci, tc_dwc_g210_pci_tbl);

static struct pci_driver tc_dwc_g210_pci_driver = {
	.name = "tc-dwc-g210-pci",
	.id_table = tc_dwc_g210_pci_tbl,
	.probe = tc_dwc_g210_pci_probe,
	.remove = tc_dwc_g210_pci_remove,
	.shutdown = tc_dwc_g210_pci_shutdown,
	.driver = {
		.pm = &tc_dwc_g210_pci_pm_ops
	},
};

module_pci_driver(tc_dwc_g210_pci_driver);

MODULE_AUTHOR("Joao Pinto <Joao.Pinto@synopsys.com>");
MODULE_DESCRIPTION("Synopsys Test Chip G210 PCI glue driver");
MODULE_LICENSE("Dual BSD/GPL");
Commit	Line	Data
ec658ea0 JP	1	/*
	2	* Synopsys G210 Test Chip driver
	3	*
	4	* Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
	5	*
	6	* Authors: Joao Pinto <jpinto@synopsys.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include "ufshcd.h"
	14	#include "ufshcd-dwc.h"
	15	#include "tc-dwc-g210.h"
	16
	17	#include <linux/pci.h>
	18	#include <linux/pm_runtime.h>
	19
	20	/* Test Chip type expected values */
	21	#define TC_G210_20BIT 20
	22	#define TC_G210_40BIT 40
	23	#define TC_G210_INV 0
	24
	25	static int tc_type = TC_G210_INV;
	26	module_param(tc_type, int, 0);
	27	MODULE_PARM_DESC(tc_type, "Test Chip Type (20 = 20-bit, 40 = 40-bit)");
	28
	29	static int tc_dwc_g210_pci_suspend(struct device *dev)
	30	{
	31	return ufshcd_system_suspend(dev_get_drvdata(dev));
	32	}
	33
	34	static int tc_dwc_g210_pci_resume(struct device *dev)
	35	{
	36	return ufshcd_system_resume(dev_get_drvdata(dev));
	37	}
	38
	39	static int tc_dwc_g210_pci_runtime_suspend(struct device *dev)
	40	{
	41	return ufshcd_runtime_suspend(dev_get_drvdata(dev));
	42	}
	43
	44	static int tc_dwc_g210_pci_runtime_resume(struct device *dev)
	45	{
	46	return ufshcd_runtime_resume(dev_get_drvdata(dev));
	47	}
	48
	49	static int tc_dwc_g210_pci_runtime_idle(struct device *dev)
	50	{
	51	return ufshcd_runtime_idle(dev_get_drvdata(dev));
	52	}
	53
	54	/**
	55	* struct ufs_hba_dwc_vops - UFS DWC specific variant operations
	56	*/
	57	static struct ufs_hba_variant_ops tc_dwc_g210_pci_hba_vops = {
	58	.name = "tc-dwc-g210-pci",
	59	.link_startup_notify = ufshcd_dwc_link_startup_notify,
	60	};
	61
	62	/**
	63	* tc_dwc_g210_pci_shutdown - main function to put the controller in reset state
	64	* @pdev: pointer to PCI device handle
65	*/
66	static void tc_dwc_g210_pci_shutdown(struct pci_dev *pdev)
67	{
68	ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
69	}
70
71	/**
72	* tc_dwc_g210_pci_remove - de-allocate PCI/SCSI host and host memory space
73	* data structure memory
74	* @pdev - pointer to PCI handle
75	*/
76	static void tc_dwc_g210_pci_remove(struct pci_dev *pdev)
77	{
78	struct ufs_hba *hba = pci_get_drvdata(pdev);
79
80	pm_runtime_forbid(&pdev->dev);
81	pm_runtime_get_noresume(&pdev->dev);
82	ufshcd_remove(hba);
83	}
84
85	/**
86	* tc_dwc_g210_pci_probe - probe routine of the driver
87	* @pdev: pointer to PCI device handle
88	* @id: PCI device id
89	*
90	* Returns 0 on success, non-zero value on failure
91	*/
92	static int
93	tc_dwc_g210_pci_probe(struct pci_dev pdev, const struct pci_device_id id)
94	{
95	struct ufs_hba *hba;
96	void __iomem *mmio_base;
97	int err;
98
99	/* Check Test Chip type and set the specific setup routine */
100	if (tc_type == TC_G210_20BIT) {
101	tc_dwc_g210_pci_hba_vops.phy_initialization =
102	tc_dwc_g210_config_20_bit;
103	} else if (tc_type == TC_G210_40BIT) {
104	tc_dwc_g210_pci_hba_vops.phy_initialization =
105	tc_dwc_g210_config_40_bit;
106	} else {
107	dev_err(&pdev->dev, "test chip version not specified\n");
108	return -EPERM;
109	}
110
111	err = pcim_enable_device(pdev);
112	if (err) {
113	dev_err(&pdev->dev, "pcim_enable_device failed\n");
114	return err;
115	}
116
117	pci_set_master(pdev);
118
119	err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD);
120	if (err < 0) {
121	dev_err(&pdev->dev, "request and iomap failed\n");
122	return err;
123	}
124
125	mmio_base = pcim_iomap_table(pdev)[0];
126
127	err = ufshcd_alloc_host(&pdev->dev, &hba);
128	if (err) {
129	dev_err(&pdev->dev, "Allocation failed\n");
130	return err;
131	}
132
ec658ea0 JP	133	hba->vops = &tc_dwc_g210_pci_hba_vops;
	134
	135	err = ufshcd_init(hba, mmio_base, pdev->irq);
	136	if (err) {
	137	dev_err(&pdev->dev, "Initialization failed\n");
	138	return err;
	139	}
	140
	141	pci_set_drvdata(pdev, hba);
	142	pm_runtime_put_noidle(&pdev->dev);
	143	pm_runtime_allow(&pdev->dev);
	144
	145	return 0;
	146	}
	147
	148	static const struct dev_pm_ops tc_dwc_g210_pci_pm_ops = {
	149	.suspend = tc_dwc_g210_pci_suspend,
	150	.resume = tc_dwc_g210_pci_resume,
	151	.runtime_suspend = tc_dwc_g210_pci_runtime_suspend,
	152	.runtime_resume = tc_dwc_g210_pci_runtime_resume,
	153	.runtime_idle = tc_dwc_g210_pci_runtime_idle,
	154	};
	155
	156	static const struct pci_device_id tc_dwc_g210_pci_tbl[] = {
	157	{ PCI_VENDOR_ID_SYNOPSYS, 0xB101, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
	158	{ PCI_VENDOR_ID_SYNOPSYS, 0xB102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
	159	{ } /* terminate list */
	160	};
	161
	162	MODULE_DEVICE_TABLE(pci, tc_dwc_g210_pci_tbl);
	163
	164	static struct pci_driver tc_dwc_g210_pci_driver = {
	165	.name = "tc-dwc-g210-pci",
	166	.id_table = tc_dwc_g210_pci_tbl,
	167	.probe = tc_dwc_g210_pci_probe,
	168	.remove = tc_dwc_g210_pci_remove,
	169	.shutdown = tc_dwc_g210_pci_shutdown,
	170	.driver = {
	171	.pm = &tc_dwc_g210_pci_pm_ops
	172	},
	173	};
	174
	175	module_pci_driver(tc_dwc_g210_pci_driver);
	176
	177	MODULE_AUTHOR("Joao Pinto <Joao.Pinto@synopsys.com>");
	178	MODULE_DESCRIPTION("Synopsys Test Chip G210 PCI glue driver");
	179	MODULE_LICENSE("Dual BSD/GPL");