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91bc4d31 VB |
1 | /* |
2 | * IXP4XX EHCI Host Controller Driver | |
3 | * | |
d6b52039 | 4 | * Author: Vladimir Barinov <vbarinov@embeddedalley.com> |
91bc4d31 VB |
5 | * |
6 | * Based on "ehci-fsl.c" by Randy Vinson <rvinson@mvista.com> | |
7 | * | |
8 | * 2007 (c) MontaVista Software, Inc. This file is licensed under | |
9 | * the terms of the GNU General Public License version 2. This program | |
10 | * is licensed "as is" without any warranty of any kind, whether express | |
11 | * or implied. | |
12 | */ | |
13 | ||
14 | #include <linux/platform_device.h> | |
15 | ||
16 | static int ixp4xx_ehci_init(struct usb_hcd *hcd) | |
17 | { | |
18 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
19 | int retval = 0; | |
20 | ||
21 | ehci->big_endian_desc = 1; | |
22 | ehci->big_endian_mmio = 1; | |
23 | ||
24 | ehci->caps = hcd->regs + 0x100; | |
25 | ehci->regs = hcd->regs + 0x100 | |
c430131a | 26 | + HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); |
91bc4d31 VB |
27 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); |
28 | ||
a8e51775 | 29 | hcd->has_tt = 1; |
91bc4d31 VB |
30 | ehci_reset(ehci); |
31 | ||
32 | retval = ehci_init(hcd); | |
33 | if (retval) | |
34 | return retval; | |
35 | ||
36 | ehci_port_power(ehci, 0); | |
37 | ||
38 | return retval; | |
39 | } | |
40 | ||
41 | static const struct hc_driver ixp4xx_ehci_hc_driver = { | |
42 | .description = hcd_name, | |
43 | .product_desc = "IXP4XX EHCI Host Controller", | |
44 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
45 | .irq = ehci_irq, | |
46 | .flags = HCD_MEMORY | HCD_USB2, | |
47 | .reset = ixp4xx_ehci_init, | |
48 | .start = ehci_run, | |
49 | .stop = ehci_stop, | |
50 | .shutdown = ehci_shutdown, | |
51 | .urb_enqueue = ehci_urb_enqueue, | |
52 | .urb_dequeue = ehci_urb_dequeue, | |
53 | .endpoint_disable = ehci_endpoint_disable, | |
b18ffd49 | 54 | .endpoint_reset = ehci_endpoint_reset, |
91bc4d31 VB |
55 | .get_frame_number = ehci_get_frame, |
56 | .hub_status_data = ehci_hub_status_data, | |
57 | .hub_control = ehci_hub_control, | |
58 | #if defined(CONFIG_PM) | |
59 | .bus_suspend = ehci_bus_suspend, | |
60 | .bus_resume = ehci_bus_resume, | |
61 | #endif | |
a8e51775 | 62 | .relinquish_port = ehci_relinquish_port, |
3a31155c | 63 | .port_handed_over = ehci_port_handed_over, |
914b7012 AS |
64 | |
65 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, | |
91bc4d31 VB |
66 | }; |
67 | ||
68 | static int ixp4xx_ehci_probe(struct platform_device *pdev) | |
69 | { | |
70 | struct usb_hcd *hcd; | |
71 | const struct hc_driver *driver = &ixp4xx_ehci_hc_driver; | |
72 | struct resource *res; | |
73 | int irq; | |
74 | int retval; | |
75 | ||
76 | if (usb_disabled()) | |
77 | return -ENODEV; | |
78 | ||
79 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
80 | if (!res) { | |
81 | dev_err(&pdev->dev, | |
82 | "Found HC with no IRQ. Check %s setup!\n", | |
7071a3ce | 83 | dev_name(&pdev->dev)); |
91bc4d31 VB |
84 | return -ENODEV; |
85 | } | |
86 | irq = res->start; | |
87 | ||
7071a3ce | 88 | hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); |
91bc4d31 VB |
89 | if (!hcd) { |
90 | retval = -ENOMEM; | |
91 | goto fail_create_hcd; | |
92 | } | |
93 | ||
94 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
95 | if (!res) { | |
96 | dev_err(&pdev->dev, | |
97 | "Found HC with no register addr. Check %s setup!\n", | |
7071a3ce | 98 | dev_name(&pdev->dev)); |
91bc4d31 VB |
99 | retval = -ENODEV; |
100 | goto fail_request_resource; | |
101 | } | |
102 | hcd->rsrc_start = res->start; | |
28f65c11 | 103 | hcd->rsrc_len = resource_size(res); |
91bc4d31 VB |
104 | |
105 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, | |
106 | driver->description)) { | |
107 | dev_dbg(&pdev->dev, "controller already in use\n"); | |
108 | retval = -EBUSY; | |
109 | goto fail_request_resource; | |
110 | } | |
111 | ||
112 | hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); | |
113 | if (hcd->regs == NULL) { | |
114 | dev_dbg(&pdev->dev, "error mapping memory\n"); | |
115 | retval = -EFAULT; | |
116 | goto fail_ioremap; | |
117 | } | |
118 | ||
119 | retval = usb_add_hcd(hcd, irq, IRQF_SHARED); | |
120 | if (retval) | |
121 | goto fail_add_hcd; | |
122 | ||
123 | return retval; | |
124 | ||
125 | fail_add_hcd: | |
126 | iounmap(hcd->regs); | |
127 | fail_ioremap: | |
128 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
129 | fail_request_resource: | |
130 | usb_put_hcd(hcd); | |
131 | fail_create_hcd: | |
7071a3ce | 132 | dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), retval); |
91bc4d31 VB |
133 | return retval; |
134 | } | |
135 | ||
136 | static int ixp4xx_ehci_remove(struct platform_device *pdev) | |
137 | { | |
138 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
139 | ||
140 | usb_remove_hcd(hcd); | |
141 | iounmap(hcd->regs); | |
142 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
143 | usb_put_hcd(hcd); | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
135db048 | 148 | MODULE_ALIAS("platform:ixp4xx-ehci"); |
91bc4d31 VB |
149 | |
150 | static struct platform_driver ixp4xx_ehci_driver = { | |
151 | .probe = ixp4xx_ehci_probe, | |
152 | .remove = ixp4xx_ehci_remove, | |
153 | .driver = { | |
154 | .name = "ixp4xx-ehci", | |
91bc4d31 VB |
155 | }, |
156 | }; |