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// SPDX-License-Identifier: GPL-2.0 OR MIT
/* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */
#include <linux/iopoll.h>
#include <linux/device.h>
#include "lima_device.h"
#include "lima_pmu.h"
#include "lima_regs.h"
#define pmu_write(reg, data) writel(data, ip->iomem + reg)
#define pmu_read(reg) readl(ip->iomem + reg)
static int lima_pmu_wait_cmd(struct lima_ip *ip)
{
struct lima_device *dev = ip->dev;
int err;
u32 v;
err = readl_poll_timeout(ip->iomem + LIMA_PMU_INT_RAWSTAT,
v, v & LIMA_PMU_INT_CMD_MASK,
100, 100000);
if (err) {
dev_err(dev->dev, "timeout wait pmu cmd\n");
return err;
}
pmu_write(LIMA_PMU_INT_CLEAR, LIMA_PMU_INT_CMD_MASK);
return 0;
}
static u32 lima_pmu_get_ip_mask(struct lima_ip *ip)
{
struct lima_device *dev = ip->dev;
u32 ret = 0;
int i;
ret |= LIMA_PMU_POWER_GP0_MASK;
if (dev->id == lima_gpu_mali400) {
ret |= LIMA_PMU_POWER_L2_MASK;
for (i = 0; i < 4; i++) {
if (dev->ip[lima_ip_pp0 + i].present)
ret |= LIMA_PMU_POWER_PP_MASK(i);
}
} else {
if (dev->ip[lima_ip_pp0].present)
ret |= LIMA450_PMU_POWER_PP0_MASK;
for (i = lima_ip_pp1; i <= lima_ip_pp3; i++) {
if (dev->ip[i].present) {
ret |= LIMA450_PMU_POWER_PP13_MASK;
break;
}
}
for (i = lima_ip_pp4; i <= lima_ip_pp7; i++) {
if (dev->ip[i].present) {
ret |= LIMA450_PMU_POWER_PP47_MASK;
break;
}
}
}
return ret;
}
static int lima_pmu_hw_init(struct lima_ip *ip)
{
int err;
u32 stat;
pmu_write(LIMA_PMU_INT_MASK, 0);
/* If this value is too low, when in high GPU clk freq,
* GPU will be in unstable state.
*/
pmu_write(LIMA_PMU_SW_DELAY, 0xffff);
/* status reg 1=off 0=on */
stat = pmu_read(LIMA_PMU_STATUS);
/* power up all ip */
if (stat) {
pmu_write(LIMA_PMU_POWER_UP, stat);
err = lima_pmu_wait_cmd(ip);
if (err)
return err;
}
return 0;
}
static void lima_pmu_hw_fini(struct lima_ip *ip)
{
u32 stat;
if (!ip->data.mask)
ip->data.mask = lima_pmu_get_ip_mask(ip);
stat = ~pmu_read(LIMA_PMU_STATUS) & ip->data.mask;
if (stat) {
pmu_write(LIMA_PMU_POWER_DOWN, stat);
/* Don't wait for interrupt on Mali400 if all domains are
* powered off because the HW won't generate an interrupt
* in this case.
*/
if (ip->dev->id == lima_gpu_mali400)
pmu_write(LIMA_PMU_INT_CLEAR, LIMA_PMU_INT_CMD_MASK);
else
lima_pmu_wait_cmd(ip);
}
}
int lima_pmu_resume(struct lima_ip *ip)
{
return lima_pmu_hw_init(ip);
}
void lima_pmu_suspend(struct lima_ip *ip)
{
lima_pmu_hw_fini(ip);
}
int lima_pmu_init(struct lima_ip *ip)
{
return lima_pmu_hw_init(ip);
}
void lima_pmu_fini(struct lima_ip *ip)
{
lima_pmu_hw_fini(ip);
}
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