1 /*
2 * (C) Copyright 2012
3 * Atmel Semiconductor <www.atmel.com>
4 * Written-by: Bo Shen <voice.shen@atmel.com>
5 *
6 * SPDX-License-Identifier: GPL-2.0+
7 */
8
9 #include <common.h>
10 #include <clk.h>
11 #include <dm.h>
12 #include <usb.h>
13 #include <asm/io.h>
14 #include <asm/arch/clk.h>
15
16 #include "ehci.h"
17
18 #if !CONFIG_IS_ENABLED(DM_USB)
19
ehci_hcd_init(int index,enum usb_init_type init,struct ehci_hccr ** hccr,struct ehci_hcor ** hcor)20 int ehci_hcd_init(int index, enum usb_init_type init,
21 struct ehci_hccr **hccr, struct ehci_hcor **hcor)
22 {
23 /* Enable UTMI PLL */
24 if (at91_upll_clk_enable())
25 return -1;
26
27 /* Enable USB Host clock */
28 at91_periph_clk_enable(ATMEL_ID_UHPHS);
29
30 *hccr = (struct ehci_hccr *)ATMEL_BASE_EHCI;
31 *hcor = (struct ehci_hcor *)((uint32_t)*hccr +
32 HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
33
34 return 0;
35 }
36
ehci_hcd_stop(int index)37 int ehci_hcd_stop(int index)
38 {
39 /* Disable USB Host Clock */
40 at91_periph_clk_disable(ATMEL_ID_UHPHS);
41
42 /* Disable UTMI PLL */
43 if (at91_upll_clk_disable())
44 return -1;
45
46 return 0;
47 }
48
49 #else
50
51 struct ehci_atmel_priv {
52 struct ehci_ctrl ehci;
53 };
54
ehci_atmel_enable_clk(struct udevice * dev)55 static int ehci_atmel_enable_clk(struct udevice *dev)
56 {
57 struct clk clk;
58 int ret;
59
60 ret = clk_get_by_index(dev, 0, &clk);
61 if (ret)
62 return ret;
63
64 ret = clk_enable(&clk);
65 if (ret)
66 return ret;
67
68 ret = clk_get_by_index(dev, 1, &clk);
69 if (ret)
70 return -EINVAL;
71
72 ret = clk_enable(&clk);
73 if (ret)
74 return ret;
75
76 clk_free(&clk);
77
78 return 0;
79 }
80
ehci_atmel_probe(struct udevice * dev)81 static int ehci_atmel_probe(struct udevice *dev)
82 {
83 struct ehci_hccr *hccr;
84 struct ehci_hcor *hcor;
85 fdt_addr_t hcd_base;
86 int ret;
87
88 ret = ehci_atmel_enable_clk(dev);
89 if (ret) {
90 debug("Failed to enable USB Host clock\n");
91 return ret;
92 }
93
94 /*
95 * Get the base address for EHCI controller from the device node
96 */
97 hcd_base = devfdt_get_addr(dev);
98 if (hcd_base == FDT_ADDR_T_NONE) {
99 debug("Can't get the EHCI register base address\n");
100 return -ENXIO;
101 }
102
103 hccr = (struct ehci_hccr *)hcd_base;
104 hcor = (struct ehci_hcor *)
105 ((u32)hccr + HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
106
107 debug("echi-atmel: init hccr %x and hcor %x hc_length %d\n",
108 (u32)hccr, (u32)hcor,
109 (u32)HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
110
111 return ehci_register(dev, hccr, hcor, NULL, 0, USB_INIT_HOST);
112 }
113
114 static const struct udevice_id ehci_usb_ids[] = {
115 { .compatible = "atmel,at91sam9g45-ehci", },
116 { }
117 };
118
119 U_BOOT_DRIVER(ehci_atmel) = {
120 .name = "ehci_atmel",
121 .id = UCLASS_USB,
122 .of_match = ehci_usb_ids,
123 .probe = ehci_atmel_probe,
124 .remove = ehci_deregister,
125 .ops = &ehci_usb_ops,
126 .platdata_auto_alloc_size = sizeof(struct usb_platdata),
127 .priv_auto_alloc_size = sizeof(struct ehci_atmel_priv),
128 .flags = DM_FLAG_ALLOC_PRIV_DMA,
129 };
130
131 #endif
132