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[u-boot] / drivers / usb / host / ehci-sunxi.c
1 /*
2  * Sunxi ehci glue
3  *
4  * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com>
5  * Copyright (C) 2014 Roman Byshko <rbyshko@gmail.com>
6  *
7  * Based on code from
8  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
9  *
10  * SPDX-License-Identifier:     GPL-2.0+
11  */
12
13 #include <common.h>
14 #include <asm/arch/clock.h>
15 #include <asm/arch/usb_phy.h>
16 #include <asm/io.h>
17 #include <dm.h>
18 #include "ehci.h"
19
20 #ifdef CONFIG_SUNXI_GEN_SUN4I
21 #define BASE_DIST               0x8000
22 #define AHB_CLK_DIST            2
23 #else
24 #define BASE_DIST               0x1000
25 #define AHB_CLK_DIST            1
26 #endif
27
28 struct ehci_sunxi_priv {
29         struct ehci_ctrl ehci;
30         int ahb_gate_mask; /* Mask of ahb_gate0 clk gate bits for this hcd */
31         int phy_index;     /* Index of the usb-phy attached to this hcd */
32 };
33
34 static int ehci_usb_probe(struct udevice *dev)
35 {
36         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
37         struct usb_platdata *plat = dev_get_platdata(dev);
38         struct ehci_sunxi_priv *priv = dev_get_priv(dev);
39         struct ehci_hccr *hccr = (struct ehci_hccr *)dev_get_addr(dev);
40         struct ehci_hcor *hcor;
41         int extra_ahb_gate_mask = 0;
42
43         /*
44          * This should go away once we've moved to the driver model for
45          * clocks resp. phys.
46          */
47         priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0;
48 #if defined(CONFIG_MACH_SUNXI_H3_H5) || defined(CONFIG_MACH_SUN50I)
49         extra_ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_OHCI0;
50 #endif
51         priv->phy_index = ((uintptr_t)hccr - SUNXI_USB1_BASE) / BASE_DIST;
52         priv->ahb_gate_mask <<= priv->phy_index * AHB_CLK_DIST;
53         extra_ahb_gate_mask <<= priv->phy_index * AHB_CLK_DIST;
54         priv->phy_index++; /* Non otg phys start at 1 */
55
56         setbits_le32(&ccm->ahb_gate0,
57                      priv->ahb_gate_mask | extra_ahb_gate_mask);
58 #ifdef CONFIG_SUNXI_GEN_SUN6I
59         setbits_le32(&ccm->ahb_reset0_cfg,
60                      priv->ahb_gate_mask | extra_ahb_gate_mask);
61 #endif
62
63         sunxi_usb_phy_init(priv->phy_index);
64         sunxi_usb_phy_power_on(priv->phy_index);
65
66         hcor = (struct ehci_hcor *)((uintptr_t)hccr +
67                                     HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
68
69         return ehci_register(dev, hccr, hcor, NULL, 0, plat->init_type);
70 }
71
72 static int ehci_usb_remove(struct udevice *dev)
73 {
74         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
75         struct ehci_sunxi_priv *priv = dev_get_priv(dev);
76         int ret;
77
78         ret = ehci_deregister(dev);
79         if (ret)
80                 return ret;
81
82         sunxi_usb_phy_exit(priv->phy_index);
83
84 #ifdef CONFIG_SUNXI_GEN_SUN6I
85         clrbits_le32(&ccm->ahb_reset0_cfg, priv->ahb_gate_mask);
86 #endif
87         clrbits_le32(&ccm->ahb_gate0, priv->ahb_gate_mask);
88
89         return 0;
90 }
91
92 static const struct udevice_id ehci_usb_ids[] = {
93         { .compatible = "allwinner,sun4i-a10-ehci", },
94         { .compatible = "allwinner,sun5i-a13-ehci", },
95         { .compatible = "allwinner,sun6i-a31-ehci", },
96         { .compatible = "allwinner,sun7i-a20-ehci", },
97         { .compatible = "allwinner,sun8i-a23-ehci", },
98         { .compatible = "allwinner,sun8i-a83t-ehci", },
99         { .compatible = "allwinner,sun8i-h3-ehci",  },
100         { .compatible = "allwinner,sun9i-a80-ehci", },
101         { .compatible = "allwinner,sun50i-a64-ehci", },
102         { }
103 };
104
105 U_BOOT_DRIVER(ehci_sunxi) = {
106         .name   = "ehci_sunxi",
107         .id     = UCLASS_USB,
108         .of_match = ehci_usb_ids,
109         .probe = ehci_usb_probe,
110         .remove = ehci_usb_remove,
111         .ops    = &ehci_usb_ops,
112         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
113         .priv_auto_alloc_size = sizeof(struct ehci_sunxi_priv),
114         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
115 };