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 
23 static int tc_type = TC_G210_INV;
24 module_param(tc_type, int, 0);
25 MODULE_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  */
30 static 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_shutdown - main function to put the controller in reset state
37  * @pdev: pointer to PCI device handle
38  */
tc_dwc_g210_pci_shutdown(struct pci_dev * pdev)39 static void tc_dwc_g210_pci_shutdown(struct pci_dev *pdev)
40 {
41 	ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
42 }
43 
44 /**
45  * tc_dwc_g210_pci_remove - de-allocate PCI/SCSI host and host memory space
46  *		data structure memory
47  * @pdev: pointer to PCI handle
48  */
tc_dwc_g210_pci_remove(struct pci_dev * pdev)49 static void tc_dwc_g210_pci_remove(struct pci_dev *pdev)
50 {
51 	struct ufs_hba *hba = pci_get_drvdata(pdev);
52 
53 	pm_runtime_forbid(&pdev->dev);
54 	pm_runtime_get_noresume(&pdev->dev);
55 	ufshcd_remove(hba);
56 }
57 
58 /**
59  * tc_dwc_g210_pci_probe - probe routine of the driver
60  * @pdev: pointer to PCI device handle
61  * @id: PCI device id
62  *
63  * Returns 0 on success, non-zero value on failure
64  */
65 static int
tc_dwc_g210_pci_probe(struct pci_dev * pdev,const struct pci_device_id * id)66 tc_dwc_g210_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
67 {
68 	struct ufs_hba *hba;
69 	void __iomem *mmio_base;
70 	int err;
71 
72 	/* Check Test Chip type and set the specific setup routine */
73 	if (tc_type == TC_G210_20BIT) {
74 		tc_dwc_g210_pci_hba_vops.phy_initialization =
75 						tc_dwc_g210_config_20_bit;
76 	} else if (tc_type == TC_G210_40BIT) {
77 		tc_dwc_g210_pci_hba_vops.phy_initialization =
78 						tc_dwc_g210_config_40_bit;
79 	} else {
80 		dev_err(&pdev->dev, "test chip version not specified\n");
81 		return -EPERM;
82 	}
83 
84 	err = pcim_enable_device(pdev);
85 	if (err) {
86 		dev_err(&pdev->dev, "pcim_enable_device failed\n");
87 		return err;
88 	}
89 
90 	pci_set_master(pdev);
91 
92 	err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD);
93 	if (err < 0) {
94 		dev_err(&pdev->dev, "request and iomap failed\n");
95 		return err;
96 	}
97 
98 	mmio_base = pcim_iomap_table(pdev)[0];
99 
100 	err = ufshcd_alloc_host(&pdev->dev, &hba);
101 	if (err) {
102 		dev_err(&pdev->dev, "Allocation failed\n");
103 		return err;
104 	}
105 
106 	hba->vops = &tc_dwc_g210_pci_hba_vops;
107 
108 	err = ufshcd_init(hba, mmio_base, pdev->irq);
109 	if (err) {
110 		dev_err(&pdev->dev, "Initialization failed\n");
111 		return err;
112 	}
113 
114 	pm_runtime_put_noidle(&pdev->dev);
115 	pm_runtime_allow(&pdev->dev);
116 
117 	return 0;
118 }
119 
120 static const struct dev_pm_ops tc_dwc_g210_pci_pm_ops = {
121 	SET_SYSTEM_SLEEP_PM_OPS(ufshcd_system_suspend, ufshcd_system_resume)
122 	SET_RUNTIME_PM_OPS(ufshcd_runtime_suspend, ufshcd_runtime_resume, NULL)
123 	.prepare	 = ufshcd_suspend_prepare,
124 	.complete	 = ufshcd_resume_complete,
125 };
126 
127 static const struct pci_device_id tc_dwc_g210_pci_tbl[] = {
128 	{ PCI_VENDOR_ID_SYNOPSYS, 0xB101, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
129 	{ PCI_VENDOR_ID_SYNOPSYS, 0xB102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
130 	{ }	/* terminate list */
131 };
132 
133 MODULE_DEVICE_TABLE(pci, tc_dwc_g210_pci_tbl);
134 
135 static struct pci_driver tc_dwc_g210_pci_driver = {
136 	.name = "tc-dwc-g210-pci",
137 	.id_table = tc_dwc_g210_pci_tbl,
138 	.probe = tc_dwc_g210_pci_probe,
139 	.remove = tc_dwc_g210_pci_remove,
140 	.shutdown = tc_dwc_g210_pci_shutdown,
141 	.driver = {
142 		.pm = &tc_dwc_g210_pci_pm_ops
143 	},
144 };
145 
146 module_pci_driver(tc_dwc_g210_pci_driver);
147 
148 MODULE_AUTHOR("Joao Pinto <Joao.Pinto@synopsys.com>");
149 MODULE_DESCRIPTION("Synopsys Test Chip G210 PCI glue driver");
150 MODULE_LICENSE("Dual BSD/GPL");
151