tc-dwc-g210-pci.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Synopsys G210 Test Chip driver
  4 *
  5 * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
  6 *
  7 * Authors: Joao Pinto <jpinto@synopsys.com>
  8 */
  9
 10#include <ufs/ufshcd.h>
 11#include "ufshcd-dwc.h"
 12#include "tc-dwc-g210.h"
 13
 14#include <linux/module.h>
 15#include <linux/pci.h>
 16#include <linux/pm_runtime.h>
 17
 18/* Test Chip type expected values */
 19#define TC_G210_20BIT 20
 20#define TC_G210_40BIT 40
 21#define TC_G210_INV 0
 22
 23static int tc_type = TC_G210_INV;
 24module_param(tc_type, int, 0);
 25MODULE_PARM_DESC(tc_type, "Test Chip Type (20 = 20-bit, 40 = 40-bit)");
 26
 27/*
 28 * struct ufs_hba_dwc_vops - UFS DWC specific variant operations
 29 */
 30static struct ufs_hba_variant_ops tc_dwc_g210_pci_hba_vops = {
 31	.name                   = "tc-dwc-g210-pci",
 32	.link_startup_notify	= ufshcd_dwc_link_startup_notify,
 33};
 34
 35/**
 36 * tc_dwc_g210_pci_remove - de-allocate PCI/SCSI host and host memory space
 37 *		data structure memory
 38 * @pdev: pointer to PCI handle
 39 */
 40static void tc_dwc_g210_pci_remove(struct pci_dev *pdev)
 41{
 42	struct ufs_hba *hba = pci_get_drvdata(pdev);
 43
 44	pm_runtime_forbid(&pdev->dev);
 45	pm_runtime_get_noresume(&pdev->dev);
 46	ufshcd_remove(hba);
 47}
 48
 49/**
 50 * tc_dwc_g210_pci_probe - probe routine of the driver
 51 * @pdev: pointer to PCI device handle
 52 * @id: PCI device id
 53 *
 54 * Return: 0 on success, non-zero value on failure.
 55 */
 56static int
 57tc_dwc_g210_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 58{
 59	struct ufs_hba *hba;
 60	void __iomem *mmio_base;
 61	int err;
 62
 63	/* Check Test Chip type and set the specific setup routine */
 64	if (tc_type == TC_G210_20BIT) {
 65		tc_dwc_g210_pci_hba_vops.phy_initialization =
 66						tc_dwc_g210_config_20_bit;
 67	} else if (tc_type == TC_G210_40BIT) {
 68		tc_dwc_g210_pci_hba_vops.phy_initialization =
 69						tc_dwc_g210_config_40_bit;
 70	} else {
 71		dev_err(&pdev->dev, "test chip version not specified\n");
 72		return -EPERM;
 73	}
 74
 75	err = pcim_enable_device(pdev);
 76	if (err) {
 77		dev_err(&pdev->dev, "pcim_enable_device failed\n");
 78		return err;
 79	}
 80
 81	pci_set_master(pdev);
 82
 83	mmio_base = pcim_iomap_region(pdev, 0, UFSHCD);
 84	if (IS_ERR(mmio_base)) {
 85		dev_err(&pdev->dev, "request and iomap failed\n");
 86		return PTR_ERR(mmio_base);
 87	}
 88
 89	err = ufshcd_alloc_host(&pdev->dev, &hba);
 90	if (err) {
 91		dev_err(&pdev->dev, "Allocation failed\n");
 92		return err;
 93	}
 94
 95	hba->vops = &tc_dwc_g210_pci_hba_vops;
 96
 97	err = ufshcd_init(hba, mmio_base, pdev->irq);
 98	if (err) {
 99		dev_err(&pdev->dev, "Initialization failed\n");
100		return err;
101	}
102
103	pm_runtime_put_noidle(&pdev->dev);
104	pm_runtime_allow(&pdev->dev);
105
106	return 0;
107}
108
109static const struct dev_pm_ops tc_dwc_g210_pci_pm_ops = {
110	SET_SYSTEM_SLEEP_PM_OPS(ufshcd_system_suspend, ufshcd_system_resume)
111	SET_RUNTIME_PM_OPS(ufshcd_runtime_suspend, ufshcd_runtime_resume, NULL)
112	.prepare	 = ufshcd_suspend_prepare,
113	.complete	 = ufshcd_resume_complete,
114};
115
116static const struct pci_device_id tc_dwc_g210_pci_tbl[] = {
117	{ PCI_VENDOR_ID_SYNOPSYS, 0xB101, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
118	{ PCI_VENDOR_ID_SYNOPSYS, 0xB102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
119	{ }	/* terminate list */
120};
121
122MODULE_DEVICE_TABLE(pci, tc_dwc_g210_pci_tbl);
123
124static struct pci_driver tc_dwc_g210_pci_driver = {
125	.name = "tc-dwc-g210-pci",
126	.id_table = tc_dwc_g210_pci_tbl,
127	.probe = tc_dwc_g210_pci_probe,
128	.remove = tc_dwc_g210_pci_remove,
129	.driver = {
130		.pm = &tc_dwc_g210_pci_pm_ops
131	},
132};
133
134module_pci_driver(tc_dwc_g210_pci_driver);
135
136MODULE_AUTHOR("Joao Pinto <Joao.Pinto@synopsys.com>");
137MODULE_DESCRIPTION("Synopsys Test Chip G210 PCI glue driver");
138MODULE_LICENSE("Dual BSD/GPL");