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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 | }, | |
9d6b204f GJ |
35 | { |
36 | .name = "ar933x-ehci", | |
37 | .driver_data = EHCI_ATH79_IP_V2, | |
38 | }, | |
502fa841 GJ |
39 | { |
40 | /* terminating entry */ | |
41 | }, | |
42 | }; | |
43 | ||
44 | MODULE_DEVICE_TABLE(platform, ehci_ath79_id_table); | |
45 | ||
46 | static int ehci_ath79_init(struct usb_hcd *hcd) | |
47 | { | |
48 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
49 | struct platform_device *pdev = to_platform_device(hcd->self.controller); | |
50 | const struct platform_device_id *id; | |
51 | int ret; | |
52 | ||
53 | id = platform_get_device_id(pdev); | |
54 | if (!id) { | |
55 | dev_err(hcd->self.controller, "missing device id\n"); | |
56 | return -EINVAL; | |
57 | } | |
58 | ||
59 | switch (id->driver_data) { | |
60 | case EHCI_ATH79_IP_V1: | |
2f7ac6c1 GJ |
61 | ehci->has_synopsys_hc_bug = 1; |
62 | ||
502fa841 | 63 | ehci->caps = hcd->regs; |
c27d5368 GJ |
64 | ehci->regs = hcd->regs + |
65 | HC_LENGTH(ehci, | |
66 | ehci_readl(ehci, &ehci->caps->hc_capbase)); | |
502fa841 GJ |
67 | break; |
68 | ||
69 | case EHCI_ATH79_IP_V2: | |
70 | hcd->has_tt = 1; | |
71 | ||
72 | ehci->caps = hcd->regs + 0x100; | |
c27d5368 GJ |
73 | ehci->regs = hcd->regs + 0x100 + |
74 | HC_LENGTH(ehci, | |
75 | ehci_readl(ehci, &ehci->caps->hc_capbase)); | |
502fa841 GJ |
76 | break; |
77 | ||
78 | default: | |
79 | BUG(); | |
80 | } | |
81 | ||
82 | dbg_hcs_params(ehci, "reset"); | |
83 | dbg_hcc_params(ehci, "reset"); | |
84 | ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); | |
85 | ehci->sbrn = 0x20; | |
86 | ||
87 | ehci_reset(ehci); | |
88 | ||
89 | ret = ehci_init(hcd); | |
90 | if (ret) | |
91 | return ret; | |
92 | ||
93 | ehci_port_power(ehci, 0); | |
94 | ||
95 | return 0; | |
96 | } | |
97 | ||
98 | static const struct hc_driver ehci_ath79_hc_driver = { | |
99 | .description = hcd_name, | |
100 | .product_desc = "Atheros built-in EHCI controller", | |
101 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
102 | .irq = ehci_irq, | |
103 | .flags = HCD_MEMORY | HCD_USB2, | |
104 | ||
105 | .reset = ehci_ath79_init, | |
106 | .start = ehci_run, | |
107 | .stop = ehci_stop, | |
108 | .shutdown = ehci_shutdown, | |
109 | ||
110 | .urb_enqueue = ehci_urb_enqueue, | |
111 | .urb_dequeue = ehci_urb_dequeue, | |
112 | .endpoint_disable = ehci_endpoint_disable, | |
113 | .endpoint_reset = ehci_endpoint_reset, | |
114 | ||
115 | .get_frame_number = ehci_get_frame, | |
116 | ||
117 | .hub_status_data = ehci_hub_status_data, | |
118 | .hub_control = ehci_hub_control, | |
119 | ||
120 | .relinquish_port = ehci_relinquish_port, | |
121 | .port_handed_over = ehci_port_handed_over, | |
122 | ||
123 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, | |
124 | }; | |
125 | ||
126 | static int ehci_ath79_probe(struct platform_device *pdev) | |
127 | { | |
128 | struct usb_hcd *hcd; | |
129 | struct resource *res; | |
130 | int irq; | |
131 | int ret; | |
132 | ||
133 | if (usb_disabled()) | |
134 | return -ENODEV; | |
135 | ||
136 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
137 | if (!res) { | |
138 | dev_dbg(&pdev->dev, "no IRQ specified\n"); | |
139 | return -ENODEV; | |
140 | } | |
141 | irq = res->start; | |
142 | ||
143 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
144 | if (!res) { | |
145 | dev_dbg(&pdev->dev, "no base address specified\n"); | |
146 | return -ENODEV; | |
147 | } | |
148 | ||
149 | hcd = usb_create_hcd(&ehci_ath79_hc_driver, &pdev->dev, | |
150 | dev_name(&pdev->dev)); | |
151 | if (!hcd) | |
152 | return -ENOMEM; | |
153 | ||
154 | hcd->rsrc_start = res->start; | |
28f65c11 | 155 | hcd->rsrc_len = resource_size(res); |
502fa841 GJ |
156 | |
157 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | |
158 | dev_dbg(&pdev->dev, "controller already in use\n"); | |
159 | ret = -EBUSY; | |
160 | goto err_put_hcd; | |
161 | } | |
162 | ||
163 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
164 | if (!hcd->regs) { | |
165 | dev_dbg(&pdev->dev, "error mapping memory\n"); | |
166 | ret = -EFAULT; | |
167 | goto err_release_region; | |
168 | } | |
169 | ||
b5dd18d8 | 170 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
502fa841 GJ |
171 | if (ret) |
172 | goto err_iounmap; | |
173 | ||
174 | return 0; | |
175 | ||
176 | err_iounmap: | |
177 | iounmap(hcd->regs); | |
178 | ||
179 | err_release_region: | |
180 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
181 | err_put_hcd: | |
182 | usb_put_hcd(hcd); | |
183 | return ret; | |
184 | } | |
185 | ||
186 | static int ehci_ath79_remove(struct platform_device *pdev) | |
187 | { | |
188 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
189 | ||
190 | usb_remove_hcd(hcd); | |
191 | iounmap(hcd->regs); | |
192 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
193 | usb_put_hcd(hcd); | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | static struct platform_driver ehci_ath79_driver = { | |
199 | .probe = ehci_ath79_probe, | |
200 | .remove = ehci_ath79_remove, | |
201 | .id_table = ehci_ath79_id_table, | |
202 | .driver = { | |
203 | .owner = THIS_MODULE, | |
204 | .name = "ath79-ehci", | |
205 | } | |
206 | }; | |
207 | ||
208 | MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ath79-ehci"); |