blob: 8e9579c0dd623d7a028619a47803bf02b77bc70e (
plain)
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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <device/mmio.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;
write32(&pmc->pwrgate_toggle, 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).
*/
write32(&pmc->cpupwrgood_timer, (TEGRA_PCLK_KHZ * 5));
uint32_t cntrl = read32(&pmc->cntrl);
cntrl &= ~PMC_CNTRL_CPUPWRREQ_POLARITY;
cntrl |= PMC_CNTRL_CPUPWRREQ_OE;
write32(&pmc->cntrl, 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
setbits32(&flow->ram_repair, RAM_REPAIR_REQ);
// Poll for completion
while (!(read32(&flow->ram_repair) & RAM_REPAIR_STS))
;
// Request RAM repair for cluster 1
setbits32(&flow->ram_repair_cluster1, RAM_REPAIR_REQ);
// Poll for completion
while (!(read32(&flow->ram_repair_cluster1) & RAM_REPAIR_STS))
;
}
|
