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1/*
2 * Generic UHCI HCD (Host Controller Driver) for Platform Devices
3 *
4 * Copyright (c) 2011 Tony Prisk <linux@prisktech.co.nz>
5 *
6 * This file is based on uhci-grlib.c
7 * (C) Copyright 2004-2007 Alan Stern, stern@rowland.harvard.edu
8 */
9
10#include <linux/of.h>
11#include <linux/device.h>
12#include <linux/platform_device.h>
13
14static int uhci_platform_init(struct usb_hcd *hcd)
15{
16 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
17
18 uhci->rh_numports = uhci_count_ports(hcd);
19
20 /* Set up pointers to to generic functions */
21 uhci->reset_hc = uhci_generic_reset_hc;
22 uhci->check_and_reset_hc = uhci_generic_check_and_reset_hc;
23
24 /* No special actions need to be taken for the functions below */
25 uhci->configure_hc = NULL;
26 uhci->resume_detect_interrupts_are_broken = NULL;
27 uhci->global_suspend_mode_is_broken = NULL;
28
29 /* Reset if the controller isn't already safely quiescent. */
30 check_and_reset_hc(uhci);
31 return 0;
32}
33
34static const struct hc_driver uhci_platform_hc_driver = {
35 .description = hcd_name,
36 .product_desc = "Generic UHCI Host Controller",
37 .hcd_priv_size = sizeof(struct uhci_hcd),
38
39 /* Generic hardware linkage */
40 .irq = uhci_irq,
41 .flags = HCD_MEMORY | HCD_USB11,
42
43 /* Basic lifecycle operations */
44 .reset = uhci_platform_init,
45 .start = uhci_start,
46#ifdef CONFIG_PM
47 .pci_suspend = NULL,
48 .pci_resume = NULL,
49 .bus_suspend = uhci_rh_suspend,
50 .bus_resume = uhci_rh_resume,
51#endif
52 .stop = uhci_stop,
53
54 .urb_enqueue = uhci_urb_enqueue,
55 .urb_dequeue = uhci_urb_dequeue,
56
57 .endpoint_disable = uhci_hcd_endpoint_disable,
58 .get_frame_number = uhci_hcd_get_frame_number,
59
60 .hub_status_data = uhci_hub_status_data,
61 .hub_control = uhci_hub_control,
62};
63
64static int uhci_hcd_platform_probe(struct platform_device *pdev)
65{
66 struct usb_hcd *hcd;
67 struct uhci_hcd *uhci;
68 struct resource *res;
69 int ret;
70
71 if (usb_disabled())
72 return -ENODEV;
73
74 /*
75 * Right now device-tree probed devices don't get dma_mask set.
76 * Since shared usb code relies on it, set it here for now.
77 * Once we have dma capability bindings this can go away.
78 */
79 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
80 if (ret)
81 return ret;
82
83 hcd = usb_create_hcd(&uhci_platform_hc_driver, &pdev->dev,
84 pdev->name);
85 if (!hcd)
86 return -ENOMEM;
87
88 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
89 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
90 if (IS_ERR(hcd->regs)) {
91 ret = PTR_ERR(hcd->regs);
92 goto err_rmr;
93 }
94 hcd->rsrc_start = res->start;
95 hcd->rsrc_len = resource_size(res);
96
97 uhci = hcd_to_uhci(hcd);
98
99 uhci->regs = hcd->regs;
100
101 ret = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED);
102 if (ret)
103 goto err_rmr;
104
105 device_wakeup_enable(hcd->self.controller);
106 return 0;
107
108err_rmr:
109 usb_put_hcd(hcd);
110
111 return ret;
112}
113
114static int uhci_hcd_platform_remove(struct platform_device *pdev)
115{
116 struct usb_hcd *hcd = platform_get_drvdata(pdev);
117
118 usb_remove_hcd(hcd);
119 usb_put_hcd(hcd);
120
121 return 0;
122}
123
124/* Make sure the controller is quiescent and that we're not using it
125 * any more. This is mainly for the benefit of programs which, like kexec,
126 * expect the hardware to be idle: not doing DMA or generating IRQs.
127 *
128 * This routine may be called in a damaged or failing kernel. Hence we
129 * do not acquire the spinlock before shutting down the controller.
130 */
131static void uhci_hcd_platform_shutdown(struct platform_device *op)
132{
133 struct usb_hcd *hcd = platform_get_drvdata(op);
134
135 uhci_hc_died(hcd_to_uhci(hcd));
136}
137
138static const struct of_device_id platform_uhci_ids[] = {
139 { .compatible = "generic-uhci", },
140 { .compatible = "platform-uhci", },
141 {}
142};
143MODULE_DEVICE_TABLE(of, platform_uhci_ids);
144
145static struct platform_driver uhci_platform_driver = {
146 .probe = uhci_hcd_platform_probe,
147 .remove = uhci_hcd_platform_remove,
148 .shutdown = uhci_hcd_platform_shutdown,
149 .driver = {
150 .name = "platform-uhci",
151 .of_match_table = platform_uhci_ids,
152 },
153};
1/*
2 * Generic UHCI HCD (Host Controller Driver) for Platform Devices
3 *
4 * Copyright (c) 2011 Tony Prisk <linux@prisktech.co.nz>
5 *
6 * This file is based on uhci-grlib.c
7 * (C) Copyright 2004-2007 Alan Stern, stern@rowland.harvard.edu
8 */
9
10#include <linux/of.h>
11#include <linux/platform_device.h>
12
13static int uhci_platform_init(struct usb_hcd *hcd)
14{
15 struct uhci_hcd *uhci = hcd_to_uhci(hcd);
16
17 uhci->rh_numports = uhci_count_ports(hcd);
18
19 /* Set up pointers to to generic functions */
20 uhci->reset_hc = uhci_generic_reset_hc;
21 uhci->check_and_reset_hc = uhci_generic_check_and_reset_hc;
22
23 /* No special actions need to be taken for the functions below */
24 uhci->configure_hc = NULL;
25 uhci->resume_detect_interrupts_are_broken = NULL;
26 uhci->global_suspend_mode_is_broken = NULL;
27
28 /* Reset if the controller isn't already safely quiescent. */
29 check_and_reset_hc(uhci);
30 return 0;
31}
32
33static const struct hc_driver uhci_platform_hc_driver = {
34 .description = hcd_name,
35 .product_desc = "Generic UHCI Host Controller",
36 .hcd_priv_size = sizeof(struct uhci_hcd),
37
38 /* Generic hardware linkage */
39 .irq = uhci_irq,
40 .flags = HCD_MEMORY | HCD_USB11,
41
42 /* Basic lifecycle operations */
43 .reset = uhci_platform_init,
44 .start = uhci_start,
45#ifdef CONFIG_PM
46 .pci_suspend = NULL,
47 .pci_resume = NULL,
48 .bus_suspend = uhci_rh_suspend,
49 .bus_resume = uhci_rh_resume,
50#endif
51 .stop = uhci_stop,
52
53 .urb_enqueue = uhci_urb_enqueue,
54 .urb_dequeue = uhci_urb_dequeue,
55
56 .endpoint_disable = uhci_hcd_endpoint_disable,
57 .get_frame_number = uhci_hcd_get_frame_number,
58
59 .hub_status_data = uhci_hub_status_data,
60 .hub_control = uhci_hub_control,
61};
62
63static int uhci_hcd_platform_probe(struct platform_device *pdev)
64{
65 struct usb_hcd *hcd;
66 struct uhci_hcd *uhci;
67 struct resource *res;
68 int ret;
69
70 if (usb_disabled())
71 return -ENODEV;
72
73 /*
74 * Right now device-tree probed devices don't get dma_mask set.
75 * Since shared usb code relies on it, set it here for now.
76 * Once we have dma capability bindings this can go away.
77 */
78 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
79 if (ret)
80 return ret;
81
82 hcd = usb_create_hcd(&uhci_platform_hc_driver, &pdev->dev,
83 pdev->name);
84 if (!hcd)
85 return -ENOMEM;
86
87 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
88 hcd->rsrc_start = res->start;
89 hcd->rsrc_len = resource_size(res);
90
91 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
92 pr_err("%s: request_mem_region failed\n", __func__);
93 ret = -EBUSY;
94 goto err_rmr;
95 }
96
97 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
98 if (!hcd->regs) {
99 pr_err("%s: ioremap failed\n", __func__);
100 ret = -ENOMEM;
101 goto err_irq;
102 }
103 uhci = hcd_to_uhci(hcd);
104
105 uhci->regs = hcd->regs;
106
107 ret = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED);
108 if (ret)
109 goto err_uhci;
110
111 device_wakeup_enable(hcd->self.controller);
112 return 0;
113
114err_uhci:
115 iounmap(hcd->regs);
116err_irq:
117 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
118err_rmr:
119 usb_put_hcd(hcd);
120
121 return ret;
122}
123
124static int uhci_hcd_platform_remove(struct platform_device *pdev)
125{
126 struct usb_hcd *hcd = platform_get_drvdata(pdev);
127
128 usb_remove_hcd(hcd);
129 iounmap(hcd->regs);
130 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
131 usb_put_hcd(hcd);
132
133 return 0;
134}
135
136/* Make sure the controller is quiescent and that we're not using it
137 * any more. This is mainly for the benefit of programs which, like kexec,
138 * expect the hardware to be idle: not doing DMA or generating IRQs.
139 *
140 * This routine may be called in a damaged or failing kernel. Hence we
141 * do not acquire the spinlock before shutting down the controller.
142 */
143static void uhci_hcd_platform_shutdown(struct platform_device *op)
144{
145 struct usb_hcd *hcd = platform_get_drvdata(op);
146
147 uhci_hc_died(hcd_to_uhci(hcd));
148}
149
150static const struct of_device_id platform_uhci_ids[] = {
151 { .compatible = "generic-uhci", },
152 { .compatible = "platform-uhci", },
153 {}
154};
155
156static struct platform_driver uhci_platform_driver = {
157 .probe = uhci_hcd_platform_probe,
158 .remove = uhci_hcd_platform_remove,
159 .shutdown = uhci_hcd_platform_shutdown,
160 .driver = {
161 .name = "platform-uhci",
162 .owner = THIS_MODULE,
163 .of_match_table = platform_uhci_ids,
164 },
165};