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
|
/*
* This file is part of the coreboot project.
*
* Copyright 2013 Google Inc.
* Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <arch/io.h>
#include <console/console.h>
#include <soc/addressmap.h>
#include <soc/clock.h>
#include <soc/flow.h>
#include <soc/pmc.h>
#include <soc/power.h>
static struct tegra_pmc_regs * const pmc = (void *)TEGRA_PMC_BASE;
static struct flow_ctlr * const flow = (void *)TEGRA_FLOW_BASE;
static int partition_powered(int id)
{
return read32(&pmc->pwrgate_status) & (0x1 << id);
}
static int partition_clamp_on(int id)
{
return read32(&pmc->clamp_status) & (0x1 << id);
}
static void power_ungate_partition(uint32_t id)
{
printk(BIOS_INFO, "Ungating power partition %d.\n", id);
if (!partition_powered(id)) {
uint32_t pwrgate_toggle = read32(&pmc->pwrgate_toggle);
pwrgate_toggle &= ~(PMC_PWRGATE_TOGGLE_PARTID_MASK);
pwrgate_toggle |= (id << PMC_PWRGATE_TOGGLE_PARTID_SHIFT);
pwrgate_toggle |= PMC_PWRGATE_TOGGLE_START;
writel(pwrgate_toggle, &pmc->pwrgate_toggle);
// Wait for the request to be accepted.
while (read32(&pmc->pwrgate_toggle) & PMC_PWRGATE_TOGGLE_START)
;
printk(BIOS_DEBUG, "Power gate toggle request accepted.\n");
// Wait for the partition to be powered.
while (!partition_powered(id))
;
// Wait for clamp off.
while (partition_clamp_on(id))
;
}
printk(BIOS_INFO, "Ungated power partition %d.\n", id);
}
void power_enable_and_ungate_cpu(void)
{
/*
* Set CPUPWRGOOD_TIMER - APB clock is 1/2 of SCLK (150MHz),
* set it for 5ms as per SysEng (5ms * PCLK_KHZ * 1000 / 1s).
*/
writel((TEGRA_PCLK_KHZ * 5), &pmc->cpupwrgood_timer);
uint32_t cntrl = read32(&pmc->cntrl);
cntrl &= ~PMC_CNTRL_CPUPWRREQ_POLARITY;
cntrl |= PMC_CNTRL_CPUPWRREQ_OE;
writel(cntrl, &pmc->cntrl);
power_ungate_partition(POWER_PARTID_CRAIL);
// Ungate power to the non-core parts of the fast cluster.
power_ungate_partition(POWER_PARTID_C0NC);
// Ungate power to CPU0 in the fast cluster.
power_ungate_partition(POWER_PARTID_CE0);
}
int power_reset_status(void)
{
return read32(&pmc->rst_status) & 0x7;
}
void ram_repair(void)
{
// Request RAM repair for cluster 0
setbits_le32(&flow->ram_repair, RAM_REPAIR_REQ);
// Poll for completion
while (!(read32(&flow->ram_repair) & RAM_REPAIR_STS))
;
// Request RAM repair for cluster 1
setbits_le32(&flow->ram_repair_cluster1, RAM_REPAIR_REQ);
// Poll for completion
while (!(read32(&flow->ram_repair_cluster1) & RAM_REPAIR_STS))
;
}
|
