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8#include <common.h>
9#include <asm-generic/io.h>
10#include <clk.h>
11#include <dm.h>
12#include <linux/io.h>
13#include <linux/usb/otg.h>
14#include <malloc.h>
15
16#include "core.h"
17
18
19#define USBSS_PID 0x0
20#define USBSS_W1 0x4
21#define USBSS_STATIC_CONFIG 0x8
22#define USBSS_PHY_TEST 0xc
23#define USBSS_DEBUG_CTRL 0x10
24#define USBSS_DEBUG_INFO 0x14
25#define USBSS_DEBUG_LINK_STATE 0x18
26#define USBSS_DEVICE_CTRL 0x1c
27
28
29#define USBSS_W1_PWRUP_RST BIT(0)
30#define USBSS_W1_OVERCURRENT_SEL BIT(8)
31#define USBSS_W1_MODESTRAP_SEL BIT(9)
32#define USBSS_W1_OVERCURRENT BIT(16)
33#define USBSS_W1_MODESTRAP_MASK GENMASK(18, 17)
34#define USBSS_W1_MODESTRAP_SHIFT 17
35#define USBSS_W1_USB2_ONLY BIT(19)
36
37
38#define USBSS1_STATIC_PLL_REF_SEL_MASK GENMASK(8, 5)
39#define USBSS1_STATIC_PLL_REF_SEL_SHIFT 5
40#define USBSS1_STATIC_LOOPBACK_MODE_MASK GENMASK(4, 3)
41#define USBSS1_STATIC_LOOPBACK_MODE_SHIFT 3
42#define USBSS1_STATIC_VBUS_SEL_MASK GENMASK(2, 1)
43#define USBSS1_STATIC_VBUS_SEL_SHIFT 1
44#define USBSS1_STATIC_LANE_REVERSE BIT(0)
45
46
47enum modestrap_mode { USBSS_MODESTRAP_MODE_NONE,
48 USBSS_MODESTRAP_MODE_HOST,
49 USBSS_MODESTRAP_MODE_PERIPHERAL};
50
51struct cdns_ti {
52 struct udevice *dev;
53 void __iomem *usbss;
54 int usb2_only:1;
55 int vbus_divider:1;
56 struct clk *usb2_refclk;
57 struct clk *lpm_clk;
58};
59
60static const int cdns_ti_rate_table[] = {
61 9600,
62 10000,
63 12000,
64 19200,
65 20000,
66 24000,
67 25000,
68 26000,
69 38400,
70 40000,
71 58000,
72 50000,
73 52000,
74};
75
76static inline u32 cdns_ti_readl(struct cdns_ti *data, u32 offset)
77{
78 return readl(data->usbss + offset);
79}
80
81static inline void cdns_ti_writel(struct cdns_ti *data, u32 offset, u32 value)
82{
83 writel(value, data->usbss + offset);
84}
85
86static int cdns_ti_probe(struct udevice *dev)
87{
88 struct cdns_ti *data = dev_get_platdata(dev);
89 struct clk usb2_refclk;
90 int modestrap_mode;
91 unsigned long rate;
92 int rate_code, i;
93 u32 reg;
94 int ret;
95
96 data->dev = dev;
97
98 data->usbss = dev_remap_addr_index(dev, 0);
99 if (!data->usbss)
100 return -EINVAL;
101
102 ret = clk_get_by_name(dev, "usb2_refclk", &usb2_refclk);
103 if (ret) {
104 dev_err(dev, "Failed to get usb2_refclk\n");
105 return ret;
106 }
107
108 rate = clk_get_rate(&usb2_refclk);
109 rate /= 1000;
110 for (i = 0; i < ARRAY_SIZE(cdns_ti_rate_table); i++) {
111 if (cdns_ti_rate_table[i] == rate)
112 break;
113 }
114
115 if (i == ARRAY_SIZE(cdns_ti_rate_table)) {
116 dev_err(dev, "unsupported usb2_refclk rate: %lu KHz\n", rate);
117 return -EINVAL;
118 }
119
120 rate_code = i;
121
122
123 reg = cdns_ti_readl(data, USBSS_W1);
124 reg &= ~USBSS_W1_PWRUP_RST;
125 cdns_ti_writel(data, USBSS_W1, reg);
126
127
128 reg = cdns_ti_readl(data, USBSS_STATIC_CONFIG);
129 reg &= ~USBSS1_STATIC_PLL_REF_SEL_MASK;
130 reg |= rate_code << USBSS1_STATIC_PLL_REF_SEL_SHIFT;
131
132 reg &= ~USBSS1_STATIC_VBUS_SEL_MASK;
133 data->vbus_divider = dev_read_bool(dev, "ti,vbus-divider");
134 if (data->vbus_divider)
135 reg |= 1 << USBSS1_STATIC_VBUS_SEL_SHIFT;
136
137 cdns_ti_writel(data, USBSS_STATIC_CONFIG, reg);
138 reg = cdns_ti_readl(data, USBSS_STATIC_CONFIG);
139
140
141 reg = cdns_ti_readl(data, USBSS_W1);
142 data->usb2_only = dev_read_bool(dev, "ti,usb2-only");
143 if (data->usb2_only)
144 reg |= USBSS_W1_USB2_ONLY;
145
146
147 if (dev_read_bool(dev, "ti,modestrap-host"))
148 modestrap_mode = USBSS_MODESTRAP_MODE_HOST;
149 else if (dev_read_bool(dev, "ti,modestrap-peripheral"))
150 modestrap_mode = USBSS_MODESTRAP_MODE_PERIPHERAL;
151 else
152 modestrap_mode = USBSS_MODESTRAP_MODE_NONE;
153
154 reg |= USBSS_W1_MODESTRAP_SEL;
155 reg &= ~USBSS_W1_MODESTRAP_MASK;
156 reg |= modestrap_mode << USBSS_W1_MODESTRAP_SHIFT;
157 cdns_ti_writel(data, USBSS_W1, reg);
158
159
160 reg |= USBSS_W1_PWRUP_RST;
161 cdns_ti_writel(data, USBSS_W1, reg);
162
163 return 0;
164}
165
166static int cdns_ti_remove(struct udevice *dev)
167{
168 struct cdns_ti *data = dev_get_platdata(dev);
169 u32 reg;
170
171
172 reg = cdns_ti_readl(data, USBSS_W1);
173 reg &= ~USBSS_W1_PWRUP_RST;
174 cdns_ti_writel(data, USBSS_W1, reg);
175
176 return 0;
177}
178
179static const struct udevice_id cdns_ti_of_match[] = {
180 { .compatible = "ti,j721e-usb", },
181 {},
182};
183
184U_BOOT_DRIVER(cdns_ti) = {
185 .name = "cdns-ti",
186 .id = UCLASS_NOP,
187 .of_match = cdns_ti_of_match,
188 .bind = cdns3_bind,
189 .probe = cdns_ti_probe,
190 .remove = cdns_ti_remove,
191 .platdata_auto_alloc_size = sizeof(struct cdns_ti),
192 .flags = DM_FLAG_OS_PREPARE,
193};
194
