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502fa841 GJ |
1 | /* |
2 | * Bus Glue for Atheros AR7XXX/AR9XXX built-in EHCI controller. | |
3 | * | |
4 | * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> | |
5 | * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> | |
6 | * | |
7 | * Parts of this file are based on Atheros' 2.6.15 BSP | |
8 | * Copyright (C) 2007 Atheros Communications, Inc. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify it | |
11 | * under the terms of the GNU General Public License version 2 as published | |
12 | * by the Free Software Foundation. | |
13 | */ | |
14 | ||
15 | #include <linux/platform_device.h> | |
16 | ||
17 | enum { | |
18 | EHCI_ATH79_IP_V1 = 0, | |
19 | EHCI_ATH79_IP_V2, | |
20 | }; | |
21 | ||
22 | static const struct platform_device_id ehci_ath79_id_table[] = { | |
23 | { | |
24 | .name = "ar71xx-ehci", | |
25 | .driver_data = EHCI_ATH79_IP_V1, | |
26 | }, | |
27 | { | |
28 | .name = "ar724x-ehci", | |
29 | .driver_data = EHCI_ATH79_IP_V2, | |
30 | }, | |
31 | { | |
32 | .name = "ar913x-ehci", | |
33 | .driver_data = EHCI_ATH79_IP_V2, | |
34 | }, | |
35 | { | |
36 | /* terminating entry */ | |
37 | }, | |
38 | }; | |
39 | ||
40 | MODULE_DEVICE_TABLE(platform, ehci_ath79_id_table); | |
41 | ||
42 | static int ehci_ath79_init(struct usb_hcd *hcd) | |
43 | { | |
44 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
45 | struct platform_device *pdev = to_platform_device(hcd->self.controller); | |
46 | const struct platform_device_id *id; | |
47 | int ret; | |
48 | ||
49 | id = platform_get_device_id(pdev); | |
50 | if (!id) { | |
51 | dev_err(hcd->self.controller, "missing device id\n"); | |
52 | return -EINVAL; | |
53 | } | |
54 | ||
55 | switch (id->driver_data) { | |
56 | case EHCI_ATH79_IP_V1: | |
2f7ac6c1 GJ |
57 | ehci->has_synopsys_hc_bug = 1; |
58 | ||
502fa841 | 59 | ehci->caps = hcd->regs; |
c27d5368 GJ |
60 | ehci->regs = hcd->regs + |
61 | HC_LENGTH(ehci, | |
62 | ehci_readl(ehci, &ehci->caps->hc_capbase)); | |
502fa841 GJ |
63 | break; |
64 | ||
65 | case EHCI_ATH79_IP_V2: | |
66 | hcd->has_tt = 1; | |
67 | ||
68 | ehci->caps = hcd->regs + 0x100; | |
c27d5368 GJ |
69 | ehci->regs = hcd->regs + 0x100 + |
70 | HC_LENGTH(ehci, | |
71 | ehci_readl(ehci, &ehci->caps->hc_capbase)); | |
502fa841 GJ |
72 | break; |
73 | ||
74 | default: | |
75 | BUG(); | |
76 | } | |
77 | ||
78 | dbg_hcs_params(ehci, "reset"); | |
79 | dbg_hcc_params(ehci, "reset"); | |
80 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); | |
81 | ehci->sbrn = 0x20; | |
82 | ||
83 | ehci_reset(ehci); | |
84 | ||
85 | ret = ehci_init(hcd); | |
86 | if (ret) | |
87 | return ret; | |
88 | ||
89 | ehci_port_power(ehci, 0); | |
90 | ||
91 | return 0; | |
92 | } | |
93 | ||
94 | static const struct hc_driver ehci_ath79_hc_driver = { | |
95 | .description = hcd_name, | |
96 | .product_desc = "Atheros built-in EHCI controller", | |
97 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
98 | .irq = ehci_irq, | |
99 | .flags = HCD_MEMORY | HCD_USB2, | |
100 | ||
101 | .reset = ehci_ath79_init, | |
102 | .start = ehci_run, | |
103 | .stop = ehci_stop, | |
104 | .shutdown = ehci_shutdown, | |
105 | ||
106 | .urb_enqueue = ehci_urb_enqueue, | |
107 | .urb_dequeue = ehci_urb_dequeue, | |
108 | .endpoint_disable = ehci_endpoint_disable, | |
109 | .endpoint_reset = ehci_endpoint_reset, | |
110 | ||
111 | .get_frame_number = ehci_get_frame, | |
112 | ||
113 | .hub_status_data = ehci_hub_status_data, | |
114 | .hub_control = ehci_hub_control, | |
115 | ||
116 | .relinquish_port = ehci_relinquish_port, | |
117 | .port_handed_over = ehci_port_handed_over, | |
118 | ||
119 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, | |
120 | }; | |
121 | ||
122 | static int ehci_ath79_probe(struct platform_device *pdev) | |
123 | { | |
124 | struct usb_hcd *hcd; | |
125 | struct resource *res; | |
126 | int irq; | |
127 | int ret; | |
128 | ||
129 | if (usb_disabled()) | |
130 | return -ENODEV; | |
131 | ||
132 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
133 | if (!res) { | |
134 | dev_dbg(&pdev->dev, "no IRQ specified\n"); | |
135 | return -ENODEV; | |
136 | } | |
137 | irq = res->start; | |
138 | ||
139 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
140 | if (!res) { | |
141 | dev_dbg(&pdev->dev, "no base address specified\n"); | |
142 | return -ENODEV; | |
143 | } | |
144 | ||
145 | hcd = usb_create_hcd(&ehci_ath79_hc_driver, &pdev->dev, | |
146 | dev_name(&pdev->dev)); | |
147 | if (!hcd) | |
148 | return -ENOMEM; | |
149 | ||
150 | hcd->rsrc_start = res->start; | |
28f65c11 | 151 | hcd->rsrc_len = resource_size(res); |
502fa841 GJ |
152 | |
153 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
154 | dev_dbg(&pdev->dev, "controller already in use\n"); | |
155 | ret = -EBUSY; | |
156 | goto err_put_hcd; | |
157 | } | |
158 | ||
159 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
160 | if (!hcd->regs) { | |
161 | dev_dbg(&pdev->dev, "error mapping memory\n"); | |
162 | ret = -EFAULT; | |
163 | goto err_release_region; | |
164 | } | |
165 | ||
b5dd18d8 | 166 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
502fa841 GJ |
167 | if (ret) |
168 | goto err_iounmap; | |
169 | ||
170 | return 0; | |
171 | ||
172 | err_iounmap: | |
173 | iounmap(hcd->regs); | |
174 | ||
175 | err_release_region: | |
176 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
177 | err_put_hcd: | |
178 | usb_put_hcd(hcd); | |
179 | return ret; | |
180 | } | |
181 | ||
182 | static int ehci_ath79_remove(struct platform_device *pdev) | |
183 | { | |
184 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
185 | ||
186 | usb_remove_hcd(hcd); | |
187 | iounmap(hcd->regs); | |
188 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
189 | usb_put_hcd(hcd); | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
194 | static struct platform_driver ehci_ath79_driver = { | |
195 | .probe = ehci_ath79_probe, | |
196 | .remove = ehci_ath79_remove, | |
197 | .id_table = ehci_ath79_id_table, | |
198 | .driver = { | |
199 | .owner = THIS_MODULE, | |
200 | .name = "ath79-ehci", | |
201 | } | |
202 | }; | |
203 | ||
204 | MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ath79-ehci"); |