1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * ci_hdrc_pci.c - MIPS USB IP core family device controller |
4 | * |
5 | * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved. |
6 | * |
7 | * Author: David Lopo |
8 | */ |
9 | |
10 | #include <linux/platform_device.h> |
11 | #include <linux/module.h> |
12 | #include <linux/pci.h> |
13 | #include <linux/interrupt.h> |
14 | #include <linux/usb/gadget.h> |
15 | #include <linux/usb/chipidea.h> |
16 | #include <linux/usb/usb_phy_generic.h> |
17 | |
18 | /* driver name */ |
19 | #define UDC_DRIVER_NAME "ci_hdrc_pci" |
20 | |
21 | struct ci_hdrc_pci { |
22 | struct platform_device *ci; |
23 | struct platform_device *phy; |
24 | }; |
25 | |
26 | /****************************************************************************** |
27 | * PCI block |
28 | *****************************************************************************/ |
29 | static struct ci_hdrc_platform_data pci_platdata = { |
30 | .name = UDC_DRIVER_NAME, |
31 | .capoffset = DEF_CAPOFFSET, |
32 | }; |
33 | |
34 | static struct ci_hdrc_platform_data langwell_pci_platdata = { |
35 | .name = UDC_DRIVER_NAME, |
36 | .capoffset = 0, |
37 | }; |
38 | |
39 | static struct ci_hdrc_platform_data penwell_pci_platdata = { |
40 | .name = UDC_DRIVER_NAME, |
41 | .capoffset = 0, |
42 | .power_budget = 200, |
43 | }; |
44 | |
45 | /** |
46 | * ci_hdrc_pci_probe: PCI probe |
47 | * @pdev: USB device controller being probed |
48 | * @id: PCI hotplug ID connecting controller to UDC framework |
49 | * |
50 | * This function returns an error code |
51 | * Allocates basic PCI resources for this USB device controller, and then |
52 | * invokes the udc_probe() method to start the UDC associated with it |
53 | */ |
54 | static int ci_hdrc_pci_probe(struct pci_dev *pdev, |
55 | const struct pci_device_id *id) |
56 | { |
57 | struct ci_hdrc_platform_data *platdata = (void *)id->driver_data; |
58 | struct ci_hdrc_pci *ci; |
59 | struct resource res[3]; |
60 | int retval = 0, nres = 2; |
61 | |
62 | if (!platdata) { |
63 | dev_err(&pdev->dev, "device doesn't provide driver data\n" ); |
64 | return -ENODEV; |
65 | } |
66 | |
67 | ci = devm_kzalloc(dev: &pdev->dev, size: sizeof(*ci), GFP_KERNEL); |
68 | if (!ci) |
69 | return -ENOMEM; |
70 | |
71 | retval = pcim_enable_device(pdev); |
72 | if (retval) |
73 | return retval; |
74 | |
75 | if (!pdev->irq) { |
76 | dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!" ); |
77 | return -ENODEV; |
78 | } |
79 | |
80 | pci_set_master(dev: pdev); |
81 | pci_try_set_mwi(dev: pdev); |
82 | |
83 | /* register a nop PHY */ |
84 | ci->phy = usb_phy_generic_register(); |
85 | if (IS_ERR(ptr: ci->phy)) |
86 | return PTR_ERR(ptr: ci->phy); |
87 | |
88 | memset(res, 0, sizeof(res)); |
89 | res[0].start = pci_resource_start(pdev, 0); |
90 | res[0].end = pci_resource_end(pdev, 0); |
91 | res[0].flags = IORESOURCE_MEM; |
92 | res[1].start = pdev->irq; |
93 | res[1].flags = IORESOURCE_IRQ; |
94 | |
95 | ci->ci = ci_hdrc_add_device(dev: &pdev->dev, res, nres, platdata); |
96 | if (IS_ERR(ptr: ci->ci)) { |
97 | dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n" ); |
98 | usb_phy_generic_unregister(ci->phy); |
99 | return PTR_ERR(ptr: ci->ci); |
100 | } |
101 | |
102 | pci_set_drvdata(pdev, data: ci); |
103 | |
104 | return 0; |
105 | } |
106 | |
107 | /** |
108 | * ci_hdrc_pci_remove: PCI remove |
109 | * @pdev: USB Device Controller being removed |
110 | * |
111 | * Reverses the effect of ci_hdrc_pci_probe(), |
112 | * first invoking the udc_remove() and then releases |
113 | * all PCI resources allocated for this USB device controller |
114 | */ |
115 | static void ci_hdrc_pci_remove(struct pci_dev *pdev) |
116 | { |
117 | struct ci_hdrc_pci *ci = pci_get_drvdata(pdev); |
118 | |
119 | ci_hdrc_remove_device(pdev: ci->ci); |
120 | usb_phy_generic_unregister(ci->phy); |
121 | } |
122 | |
123 | /* |
124 | * PCI device table |
125 | * PCI device structure |
126 | * |
127 | * Check "pci.h" for details |
128 | * |
129 | * Note: ehci-pci driver may try to probe the device first. You have to add an |
130 | * ID to the bypass_pci_id_table in ehci-pci driver to prevent this. |
131 | */ |
132 | static const struct pci_device_id ci_hdrc_pci_id_table[] = { |
133 | { |
134 | PCI_DEVICE(0x153F, 0x1004), |
135 | .driver_data = (kernel_ulong_t)&pci_platdata, |
136 | }, |
137 | { |
138 | PCI_DEVICE(0x153F, 0x1006), |
139 | .driver_data = (kernel_ulong_t)&pci_platdata, |
140 | }, |
141 | { |
142 | PCI_VDEVICE(INTEL, 0x0811), |
143 | .driver_data = (kernel_ulong_t)&langwell_pci_platdata, |
144 | }, |
145 | { |
146 | PCI_VDEVICE(INTEL, 0x0829), |
147 | .driver_data = (kernel_ulong_t)&penwell_pci_platdata, |
148 | }, |
149 | { |
150 | /* Intel Clovertrail */ |
151 | PCI_VDEVICE(INTEL, 0xe006), |
152 | .driver_data = (kernel_ulong_t)&penwell_pci_platdata, |
153 | }, |
154 | { 0 } /* end: all zeroes */ |
155 | }; |
156 | MODULE_DEVICE_TABLE(pci, ci_hdrc_pci_id_table); |
157 | |
158 | static struct pci_driver ci_hdrc_pci_driver = { |
159 | .name = UDC_DRIVER_NAME, |
160 | .id_table = ci_hdrc_pci_id_table, |
161 | .probe = ci_hdrc_pci_probe, |
162 | .remove = ci_hdrc_pci_remove, |
163 | }; |
164 | |
165 | module_pci_driver(ci_hdrc_pci_driver); |
166 | |
167 | MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>" ); |
168 | MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller" ); |
169 | MODULE_LICENSE("GPL" ); |
170 | MODULE_ALIAS("platform:ci13xxx_pci" ); |
171 | |