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