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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_l2_cache.h"
#include "lima_regs.h"
#define l2_cache_write(reg, data) writel(data, ip->iomem + reg)
#define l2_cache_read(reg) readl(ip->iomem + reg)
static int lima_l2_cache_wait_idle(struct lima_ip *ip)
{
struct lima_device *dev = ip->dev;
int err;
u32 v;
err = readl_poll_timeout(ip->iomem + LIMA_L2_CACHE_STATUS, v,
!(v & LIMA_L2_CACHE_STATUS_COMMAND_BUSY),
0, 1000);
if (err) {
dev_err(dev->dev, "l2 cache wait command timeout\n");
return err;
}
return 0;
}
int lima_l2_cache_flush(struct lima_ip *ip)
{
int ret;
spin_lock(&ip->data.lock);
l2_cache_write(LIMA_L2_CACHE_COMMAND, LIMA_L2_CACHE_COMMAND_CLEAR_ALL);
ret = lima_l2_cache_wait_idle(ip);
spin_unlock(&ip->data.lock);
return ret;
}
int lima_l2_cache_init(struct lima_ip *ip)
{
int i, err;
u32 size;
struct lima_device *dev = ip->dev;
/* l2_cache2 only exists when one of PP4-7 present */
if (ip->id == lima_ip_l2_cache2) {
for (i = lima_ip_pp4; i <= lima_ip_pp7; i++) {
if (dev->ip[i].present)
break;
}
if (i > lima_ip_pp7)
return -ENODEV;
}
spin_lock_init(&ip->data.lock);
size = l2_cache_read(LIMA_L2_CACHE_SIZE);
dev_info(dev->dev, "l2 cache %uK, %u-way, %ubyte cache line, %ubit external bus\n",
1 << (((size >> 16) & 0xff) - 10),
1 << ((size >> 8) & 0xff),
1 << (size & 0xff),
1 << ((size >> 24) & 0xff));
err = lima_l2_cache_flush(ip);
if (err)
return err;
l2_cache_write(LIMA_L2_CACHE_ENABLE,
LIMA_L2_CACHE_ENABLE_ACCESS|LIMA_L2_CACHE_ENABLE_READ_ALLOCATE);
l2_cache_write(LIMA_L2_CACHE_MAX_READS, 0x1c);
return 0;
}
void lima_l2_cache_fini(struct lima_ip *ip)
{
}
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