1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2016 Chen-Yu Tsai. All rights reserved.
4 */
5
6#include <linux/clk.h>
7#include <linux/clk-provider.h>
8#include <linux/of_address.h>
9#include <linux/platform_device.h>
10
11#include "ccu_common.h"
12#include "ccu_gate.h"
13#include "ccu_reset.h"
14
15#include "ccu-sun9i-a80-usb.h"
16
17static const struct clk_parent_data clk_parent_hosc[] = {
18	{ .fw_name = "hosc" },
19};
20
21static const struct clk_parent_data clk_parent_bus[] = {
22	{ .fw_name = "bus" },
23};
24
25static SUNXI_CCU_GATE_DATA(bus_hci0_clk, "bus-hci0", clk_parent_bus, 0x0, BIT(1), 0);
26static SUNXI_CCU_GATE_DATA(usb_ohci0_clk, "usb-ohci0", clk_parent_hosc, 0x0, BIT(2), 0);
27static SUNXI_CCU_GATE_DATA(bus_hci1_clk, "bus-hci1", clk_parent_bus, 0x0, BIT(3), 0);
28static SUNXI_CCU_GATE_DATA(bus_hci2_clk, "bus-hci2", clk_parent_bus, 0x0, BIT(5), 0);
29static SUNXI_CCU_GATE_DATA(usb_ohci2_clk, "usb-ohci2", clk_parent_hosc, 0x0, BIT(6), 0);
30
31static SUNXI_CCU_GATE_DATA(usb0_phy_clk, "usb0-phy", clk_parent_hosc, 0x4, BIT(1), 0);
32static SUNXI_CCU_GATE_DATA(usb1_hsic_clk, "usb1-hsic", clk_parent_hosc, 0x4, BIT(2), 0);
33static SUNXI_CCU_GATE_DATA(usb1_phy_clk, "usb1-phy", clk_parent_hosc, 0x4, BIT(3), 0);
34static SUNXI_CCU_GATE_DATA(usb2_hsic_clk, "usb2-hsic", clk_parent_hosc, 0x4, BIT(4), 0);
35static SUNXI_CCU_GATE_DATA(usb2_phy_clk, "usb2-phy", clk_parent_hosc, 0x4, BIT(5), 0);
36static SUNXI_CCU_GATE_DATA(usb_hsic_clk, "usb-hsic", clk_parent_hosc, 0x4, BIT(10), 0);
37
38static struct ccu_common *sun9i_a80_usb_clks[] = {
39	&bus_hci0_clk.common,
40	&usb_ohci0_clk.common,
41	&bus_hci1_clk.common,
42	&bus_hci2_clk.common,
43	&usb_ohci2_clk.common,
44
45	&usb0_phy_clk.common,
46	&usb1_hsic_clk.common,
47	&usb1_phy_clk.common,
48	&usb2_hsic_clk.common,
49	&usb2_phy_clk.common,
50	&usb_hsic_clk.common,
51};
52
53static struct clk_hw_onecell_data sun9i_a80_usb_hw_clks = {
54	.hws	= {
55		[CLK_BUS_HCI0]	= &bus_hci0_clk.common.hw,
56		[CLK_USB_OHCI0]	= &usb_ohci0_clk.common.hw,
57		[CLK_BUS_HCI1]	= &bus_hci1_clk.common.hw,
58		[CLK_BUS_HCI2]	= &bus_hci2_clk.common.hw,
59		[CLK_USB_OHCI2]	= &usb_ohci2_clk.common.hw,
60
61		[CLK_USB0_PHY]	= &usb0_phy_clk.common.hw,
62		[CLK_USB1_HSIC]	= &usb1_hsic_clk.common.hw,
63		[CLK_USB1_PHY]	= &usb1_phy_clk.common.hw,
64		[CLK_USB2_HSIC]	= &usb2_hsic_clk.common.hw,
65		[CLK_USB2_PHY]	= &usb2_phy_clk.common.hw,
66		[CLK_USB_HSIC]	= &usb_hsic_clk.common.hw,
67	},
68	.num	= CLK_NUMBER,
69};
70
71static struct ccu_reset_map sun9i_a80_usb_resets[] = {
72	[RST_USB0_HCI]		= { 0x0, BIT(17) },
73	[RST_USB1_HCI]		= { 0x0, BIT(18) },
74	[RST_USB2_HCI]		= { 0x0, BIT(19) },
75
76	[RST_USB0_PHY]		= { 0x4, BIT(17) },
77	[RST_USB1_HSIC]		= { 0x4, BIT(18) },
78	[RST_USB1_PHY]		= { 0x4, BIT(19) },
79	[RST_USB2_HSIC]		= { 0x4, BIT(20) },
80	[RST_USB2_PHY]		= { 0x4, BIT(21) },
81};
82
83static const struct sunxi_ccu_desc sun9i_a80_usb_clk_desc = {
84	.ccu_clks	= sun9i_a80_usb_clks,
85	.num_ccu_clks	= ARRAY_SIZE(sun9i_a80_usb_clks),
86
87	.hw_clks	= &sun9i_a80_usb_hw_clks,
88
89	.resets		= sun9i_a80_usb_resets,
90	.num_resets	= ARRAY_SIZE(sun9i_a80_usb_resets),
91};
92
93static int sun9i_a80_usb_clk_probe(struct platform_device *pdev)
94{
95	struct resource *res;
96	struct clk *bus_clk;
97	void __iomem *reg;
98	int ret;
99
100	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
101	reg = devm_ioremap_resource(&pdev->dev, res);
102	if (IS_ERR(reg))
103		return PTR_ERR(reg);
104
105	bus_clk = devm_clk_get(&pdev->dev, "bus");
106	if (IS_ERR(bus_clk)) {
107		ret = PTR_ERR(bus_clk);
108		if (ret != -EPROBE_DEFER)
109			dev_err(&pdev->dev, "Couldn't get bus clk: %d\n", ret);
110		return ret;
111	}
112
113	/* The bus clock needs to be enabled for us to access the registers */
114	ret = clk_prepare_enable(bus_clk);
115	if (ret) {
116		dev_err(&pdev->dev, "Couldn't enable bus clk: %d\n", ret);
117		return ret;
118	}
119
120	ret = sunxi_ccu_probe(pdev->dev.of_node, reg,
121			      &sun9i_a80_usb_clk_desc);
122	if (ret)
123		goto err_disable_clk;
124
125	return 0;
126
127err_disable_clk:
128	clk_disable_unprepare(bus_clk);
129	return ret;
130}
131
132static const struct of_device_id sun9i_a80_usb_clk_ids[] = {
133	{ .compatible = "allwinner,sun9i-a80-usb-clks" },
134	{ }
135};
136
137static struct platform_driver sun9i_a80_usb_clk_driver = {
138	.probe	= sun9i_a80_usb_clk_probe,
139	.driver	= {
140		.name	= "sun9i-a80-usb-clks",
141		.of_match_table	= sun9i_a80_usb_clk_ids,
142	},
143};
144builtin_platform_driver(sun9i_a80_usb_clk_driver);
145