1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2013 - 2017 Xilinx Inc.
*/
#include <common.h>
#include <asm/io.h>
#include <malloc.h>
#include <asm/arch/hardware.h>
#include <asm/arch/sys_proto.h>
#define SLCR_LOCK_MAGIC 0x767B
#define SLCR_UNLOCK_MAGIC 0xDF0D
#define SLCR_NAND_L2_SEL 0x10
#define SLCR_NAND_L2_SEL_MASK 0x1F
#define SLCR_USB_L1_SEL 0x04
#define SLCR_IDCODE_MASK 0x1F000
#define SLCR_IDCODE_SHIFT 12
/*
* zynq_slcr_mio_get_status - Get the status of MIO peripheral.
*
* @peri_name: Name of the peripheral for checking MIO status
* @get_pins: Pointer to array of get pin for this peripheral
* @num_pins: Number of pins for this peripheral
* @mask: Mask value
* @check_val: Required check value to get the status of periph
*/
struct zynq_slcr_mio_get_status {
const char *peri_name;
const int *get_pins;
int num_pins;
u32 mask;
u32 check_val;
};
static const int nand8_pins[] = {
0, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
};
static const int nand16_pins[] = {
16, 17, 18, 19, 20, 21, 22, 23
};
static const int usb0_pins[] = {
28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39
};
static const int usb1_pins[] = {
40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51
};
static const struct zynq_slcr_mio_get_status mio_periphs[] = {
{
"nand8",
nand8_pins,
ARRAY_SIZE(nand8_pins),
SLCR_NAND_L2_SEL_MASK,
SLCR_NAND_L2_SEL,
},
{
"nand16",
nand16_pins,
ARRAY_SIZE(nand16_pins),
SLCR_NAND_L2_SEL_MASK,
SLCR_NAND_L2_SEL,
},
{
"usb0",
usb0_pins,
ARRAY_SIZE(usb0_pins),
SLCR_USB_L1_SEL,
SLCR_USB_L1_SEL,
},
{
"usb1",
usb1_pins,
ARRAY_SIZE(usb1_pins),
SLCR_USB_L1_SEL,
SLCR_USB_L1_SEL,
},
};
static int slcr_lock = 1; /* 1 means locked, 0 means unlocked */
void zynq_slcr_lock(void)
{
if (!slcr_lock) {
writel(SLCR_LOCK_MAGIC, &slcr_base->slcr_lock);
slcr_lock = 1;
}
}
void zynq_slcr_unlock(void)
{
if (slcr_lock) {
writel(SLCR_UNLOCK_MAGIC, &slcr_base->slcr_unlock);
slcr_lock = 0;
}
}
/* Reset the entire system */
void zynq_slcr_cpu_reset(void)
{
/*
* Unlock the SLCR then reset the system.
* Note that this seems to require raw i/o
* functions or there's a lockup?
*/
zynq_slcr_unlock();
/*
* Clear 0x0F000000 bits of reboot status register to workaround
* the FSBL not loading the bitstream after soft-reboot
* This is a temporary solution until we know more.
*/
clrbits_le32(&slcr_base->reboot_status, 0xF000000);
writel(1, &slcr_base->pss_rst_ctrl);
}
void zynq_slcr_devcfg_disable(void)
{
u32 reg_val;
zynq_slcr_unlock();
/* Disable AXI interface by asserting FPGA resets */
writel(0xF, &slcr_base->fpga_rst_ctrl);
/* Disable Level shifters before setting PS-PL */
reg_val = readl(&slcr_base->lvl_shftr_en);
reg_val &= ~0xF;
writel(reg_val, &slcr_base->lvl_shftr_en);
/* Set Level Shifters DT618760 */
writel(0xA, &slcr_base->lvl_shftr_en);
zynq_slcr_lock();
}
void zynq_slcr_devcfg_enable(void)
{
zynq_slcr_unlock();
/* Set Level Shifters DT618760 */
writel(0xF, &slcr_base->lvl_shftr_en);
/* Enable AXI interface by de-asserting FPGA resets */
writel(0x0, &slcr_base->fpga_rst_ctrl);
zynq_slcr_lock();
}
u32 zynq_slcr_get_boot_mode(void)
{
/* Get the bootmode register value */
return readl(&slcr_base->boot_mode);
}
u32 zynq_slcr_get_idcode(void)
{
return (readl(&slcr_base->pss_idcode) & SLCR_IDCODE_MASK) >>
SLCR_IDCODE_SHIFT;
}
/*
* zynq_slcr_get_mio_pin_status - Get the MIO pin status of peripheral.
*
* @periph: Name of the peripheral
*
* Returns count to indicate the number of pins configured for the
* given @periph.
*/
int zynq_slcr_get_mio_pin_status(const char *periph)
{
const struct zynq_slcr_mio_get_status *mio_ptr;
int val, j;
int mio = 0;
u32 i;
for (i = 0; i < ARRAY_SIZE(mio_periphs); i++) {
if (strcmp(periph, mio_periphs[i].peri_name) == 0) {
mio_ptr = &mio_periphs[i];
for (j = 0; j < mio_ptr->num_pins; j++) {
val = readl(&slcr_base->mio_pin
[mio_ptr->get_pins[j]]);
if ((val & mio_ptr->mask) == mio_ptr->check_val)
mio++;
}
break;
}
}
return mio;
}
|