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1643accd DD |
1 | /* |
2 | * EHCI HCD glue for Cavium Octeon II SOCs. | |
3 | * | |
4 | * Loosely based on ehci-au1xxx.c | |
5 | * | |
6 | * This file is subject to the terms and conditions of the GNU General Public | |
7 | * License. See the file "COPYING" in the main directory of this archive | |
8 | * for more details. | |
9 | * | |
10 | * Copyright (C) 2010 Cavium Networks | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/platform_device.h> | |
15 | ||
16 | #include <asm/octeon/octeon.h> | |
17 | #include <asm/octeon/cvmx-uctlx-defs.h> | |
18 | ||
19 | #define OCTEON_OHCI_HCD_NAME "octeon-ohci" | |
20 | ||
21 | /* Common clock init code. */ | |
22 | void octeon2_usb_clocks_start(void); | |
23 | void octeon2_usb_clocks_stop(void); | |
24 | ||
25 | static void ohci_octeon_hw_start(void) | |
26 | { | |
27 | union cvmx_uctlx_ohci_ctl ohci_ctl; | |
28 | ||
29 | octeon2_usb_clocks_start(); | |
30 | ||
31 | ohci_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_OHCI_CTL(0)); | |
32 | ohci_ctl.s.l2c_addr_msb = 0; | |
33 | ohci_ctl.s.l2c_buff_emod = 1; /* Byte swapped. */ | |
34 | ohci_ctl.s.l2c_desc_emod = 1; /* Byte swapped. */ | |
35 | cvmx_write_csr(CVMX_UCTLX_OHCI_CTL(0), ohci_ctl.u64); | |
36 | ||
37 | } | |
38 | ||
39 | static void ohci_octeon_hw_stop(void) | |
40 | { | |
41 | /* Undo ohci_octeon_start() */ | |
42 | octeon2_usb_clocks_stop(); | |
43 | } | |
44 | ||
45 | static int __devinit ohci_octeon_start(struct usb_hcd *hcd) | |
46 | { | |
47 | struct ohci_hcd *ohci = hcd_to_ohci(hcd); | |
48 | int ret; | |
49 | ||
50 | ret = ohci_init(ohci); | |
51 | ||
52 | if (ret < 0) | |
53 | return ret; | |
54 | ||
55 | ret = ohci_run(ohci); | |
56 | ||
57 | if (ret < 0) { | |
58 | ohci_err(ohci, "can't start %s", hcd->self.bus_name); | |
59 | ohci_stop(hcd); | |
60 | return ret; | |
61 | } | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
66 | static const struct hc_driver ohci_octeon_hc_driver = { | |
67 | .description = hcd_name, | |
68 | .product_desc = "Octeon OHCI", | |
69 | .hcd_priv_size = sizeof(struct ohci_hcd), | |
70 | ||
71 | /* | |
72 | * generic hardware linkage | |
73 | */ | |
74 | .irq = ohci_irq, | |
75 | .flags = HCD_USB11 | HCD_MEMORY, | |
76 | ||
77 | /* | |
78 | * basic lifecycle operations | |
79 | */ | |
80 | .start = ohci_octeon_start, | |
81 | .stop = ohci_stop, | |
82 | .shutdown = ohci_shutdown, | |
83 | ||
84 | /* | |
85 | * managing i/o requests and associated device resources | |
86 | */ | |
87 | .urb_enqueue = ohci_urb_enqueue, | |
88 | .urb_dequeue = ohci_urb_dequeue, | |
89 | .endpoint_disable = ohci_endpoint_disable, | |
90 | ||
91 | /* | |
92 | * scheduling support | |
93 | */ | |
94 | .get_frame_number = ohci_get_frame, | |
95 | ||
96 | /* | |
97 | * root hub support | |
98 | */ | |
99 | .hub_status_data = ohci_hub_status_data, | |
100 | .hub_control = ohci_hub_control, | |
101 | ||
102 | .start_port_reset = ohci_start_port_reset, | |
103 | }; | |
104 | ||
105 | static int ohci_octeon_drv_probe(struct platform_device *pdev) | |
106 | { | |
107 | struct usb_hcd *hcd; | |
108 | struct ohci_hcd *ohci; | |
109 | void *reg_base; | |
110 | struct resource *res_mem; | |
111 | int irq; | |
112 | int ret; | |
113 | ||
114 | if (usb_disabled()) | |
115 | return -ENODEV; | |
116 | ||
117 | irq = platform_get_irq(pdev, 0); | |
118 | if (irq < 0) { | |
119 | dev_err(&pdev->dev, "No irq assigned\n"); | |
120 | return -ENODEV; | |
121 | } | |
122 | ||
123 | res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
124 | if (res_mem == NULL) { | |
125 | dev_err(&pdev->dev, "No register space assigned\n"); | |
126 | return -ENODEV; | |
127 | } | |
128 | ||
129 | /* Ohci is a 32-bit device. */ | |
130 | pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); | |
131 | pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask; | |
132 | ||
133 | hcd = usb_create_hcd(&ohci_octeon_hc_driver, &pdev->dev, "octeon"); | |
134 | if (!hcd) | |
135 | return -ENOMEM; | |
136 | ||
137 | hcd->rsrc_start = res_mem->start; | |
28f65c11 | 138 | hcd->rsrc_len = resource_size(res_mem); |
1643accd DD |
139 | |
140 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, | |
141 | OCTEON_OHCI_HCD_NAME)) { | |
142 | dev_err(&pdev->dev, "request_mem_region failed\n"); | |
143 | ret = -EBUSY; | |
144 | goto err1; | |
145 | } | |
146 | ||
147 | reg_base = ioremap(hcd->rsrc_start, hcd->rsrc_len); | |
148 | if (!reg_base) { | |
149 | dev_err(&pdev->dev, "ioremap failed\n"); | |
150 | ret = -ENOMEM; | |
151 | goto err2; | |
152 | } | |
153 | ||
154 | ohci_octeon_hw_start(); | |
155 | ||
156 | hcd->regs = reg_base; | |
157 | ||
158 | ohci = hcd_to_ohci(hcd); | |
159 | ||
160 | /* Octeon OHCI matches CPU endianness. */ | |
161 | #ifdef __BIG_ENDIAN | |
162 | ohci->flags |= OHCI_QUIRK_BE_MMIO; | |
163 | #endif | |
164 | ||
165 | ohci_hcd_init(ohci); | |
166 | ||
b5dd18d8 | 167 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
1643accd DD |
168 | if (ret) { |
169 | dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret); | |
170 | goto err3; | |
171 | } | |
172 | ||
173 | platform_set_drvdata(pdev, hcd); | |
174 | ||
175 | return 0; | |
176 | ||
177 | err3: | |
178 | ohci_octeon_hw_stop(); | |
179 | ||
180 | iounmap(hcd->regs); | |
181 | err2: | |
182 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
183 | err1: | |
184 | usb_put_hcd(hcd); | |
185 | return ret; | |
186 | } | |
187 | ||
188 | static int ohci_octeon_drv_remove(struct platform_device *pdev) | |
189 | { | |
190 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
191 | ||
192 | usb_remove_hcd(hcd); | |
193 | ||
194 | ohci_octeon_hw_stop(); | |
195 | iounmap(hcd->regs); | |
196 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
197 | usb_put_hcd(hcd); | |
198 | ||
199 | platform_set_drvdata(pdev, NULL); | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
204 | static struct platform_driver ohci_octeon_driver = { | |
205 | .probe = ohci_octeon_drv_probe, | |
206 | .remove = ohci_octeon_drv_remove, | |
207 | .shutdown = usb_hcd_platform_shutdown, | |
208 | .driver = { | |
209 | .name = OCTEON_OHCI_HCD_NAME, | |
210 | .owner = THIS_MODULE, | |
211 | } | |
212 | }; | |
213 | ||
214 | MODULE_ALIAS("platform:" OCTEON_OHCI_HCD_NAME); |