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CoolPi-Armbian-Rockchip-RK3.../drivers/soc/rockchip/rockchip_decompress.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2020 Rockchip Electronics Co., Ltd.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/initramfs.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/soc/rockchip/rockchip_decompress.h>
#define DECOM_CTRL 0x0
#define DECOM_ENR 0x4
#define DECOM_RADDR 0x8
#define DECOM_WADDR 0xc
#define DECOM_UDDSL 0x10
#define DECOM_UDDSH 0x14
#define DECOM_TXTHR 0x18
#define DECOM_RXTHR 0x1c
#define DECOM_SLEN 0x20
#define DECOM_STAT 0x24
#define DECOM_ISR 0x28
#define DECOM_IEN 0x2c
#define DECOM_AXI_STAT 0x30
#define DECOM_TSIZEL 0x34
#define DECOM_TSIZEH 0x38
#define DECOM_MGNUM 0x3c
#define DECOM_FRAME 0x40
#define DECOM_DICTID 0x44
#define DECOM_CSL 0x48
#define DECOM_CSH 0x4c
#define DECOM_LMTSL 0x50
#define DECOM_LMTSH 0x54
#define LZ4_HEAD_CSUM_CHECK_EN BIT(1)
#define LZ4_BLOCK_CSUM_CHECK_EN BIT(2)
#define LZ4_CONT_CSUM_CHECK_EN BIT(3)
#define DSOLIEN BIT(19)
#define ZDICTEIEN BIT(18)
#define GCMEIEN BIT(17)
#define GIDEIEN BIT(16)
#define CCCEIEN BIT(15)
#define BCCEIEN BIT(14)
#define HCCEIEN BIT(13)
#define CSEIEN BIT(12)
#define DICTEIEN BIT(11)
#define VNEIEN BIT(10)
#define WNEIEN BIT(9)
#define RDCEIEN BIT(8)
#define WRCEIEN BIT(7)
#define DISEIEN BIT(6)
#define LENEIEN BIT(5)
#define LITEIEN BIT(4)
#define SQMEIEN BIT(3)
#define SLCIEN BIT(2)
#define HDEIEN BIT(1)
#define DSIEN BIT(0)
#define DECOM_STOP BIT(0)
#define DECOM_COMPLETE BIT(0)
#define DECOM_GZIP_MODE BIT(4)
#define DECOM_ZLIB_MODE BIT(5)
#define DECOM_DEFLATE_MODE BIT(0)
#define DECOM_ENABLE 0x1
#define DECOM_DISABLE 0x0
#define DECOM_INT_MASK \
(DSOLIEN | ZDICTEIEN | GCMEIEN | GIDEIEN | \
CCCEIEN | BCCEIEN | HCCEIEN | CSEIEN | \
DICTEIEN | VNEIEN | WNEIEN | RDCEIEN | WRCEIEN | \
DISEIEN | LENEIEN | LITEIEN | SQMEIEN | SLCIEN | \
HDEIEN | DSIEN)
struct rk_decom {
struct device *dev;
int irq;
int num_clocks;
struct clk_bulk_data *clocks;
void __iomem *regs;
phys_addr_t mem_start;
size_t mem_size;
struct reset_control *reset;
};
static struct rk_decom *g_decom;
static DECLARE_WAIT_QUEUE_HEAD(g_decom_wait);
static bool g_decom_complete;
static bool g_decom_noblocking;
static u64 g_decom_data_len;
void __init wait_initrd_hw_decom_done(void)
{
wait_event(g_decom_wait, g_decom_complete);
}
int rk_decom_wait_done(u32 timeout, u64 *decom_len)
{
int ret;
if (!decom_len)
return -EINVAL;
ret = wait_event_timeout(g_decom_wait, g_decom_complete, timeout * HZ);
if (!ret) {
if (g_decom)
clk_bulk_disable_unprepare(g_decom->num_clocks, g_decom->clocks);
return -ETIMEDOUT;
}
*decom_len = g_decom_data_len;
return 0;
}
EXPORT_SYMBOL(rk_decom_wait_done);
static DECLARE_WAIT_QUEUE_HEAD(decom_init_done);
int rk_decom_start(u32 mode, phys_addr_t src, phys_addr_t dst, u32 dst_max_size)
{
int ret;
u32 irq_status;
u32 decom_enr;
u32 decom_mode = rk_get_decom_mode(mode);
wait_event_timeout(decom_init_done, g_decom, HZ);
if (!g_decom)
return -EINVAL;
if (g_decom->mem_start)
pr_info("%s: mode %u src %pa dst %pa max_size %u\n",
__func__, mode, &src, &dst, dst_max_size);
ret = clk_bulk_prepare_enable(g_decom->num_clocks, g_decom->clocks);
if (ret)
return ret;
g_decom_complete = false;
g_decom_data_len = 0;
g_decom_noblocking = rk_get_noblocking_flag(mode);
decom_enr = readl(g_decom->regs + DECOM_ENR);
if (decom_enr & 0x1) {
pr_err("decompress busy\n");
ret = -EBUSY;
goto error;
}
if (g_decom->reset) {
reset_control_assert(g_decom->reset);
udelay(10);
reset_control_deassert(g_decom->reset);
}
irq_status = readl(g_decom->regs + DECOM_ISR);
/* clear interrupts */
if (irq_status)
writel(irq_status, g_decom->regs + DECOM_ISR);
switch (decom_mode) {
case LZ4_MOD:
writel(LZ4_CONT_CSUM_CHECK_EN |
LZ4_HEAD_CSUM_CHECK_EN |
LZ4_BLOCK_CSUM_CHECK_EN |
LZ4_MOD, g_decom->regs + DECOM_CTRL);
break;
case GZIP_MOD:
writel(DECOM_DEFLATE_MODE | DECOM_GZIP_MODE,
g_decom->regs + DECOM_CTRL);
break;
case ZLIB_MOD:
writel(DECOM_DEFLATE_MODE | DECOM_ZLIB_MODE,
g_decom->regs + DECOM_CTRL);
break;
default:
pr_err("undefined mode : %d\n", decom_mode);
ret = -EINVAL;
goto error;
}
writel(src, g_decom->regs + DECOM_RADDR);
writel(dst, g_decom->regs + DECOM_WADDR);
writel(dst_max_size, g_decom->regs + DECOM_LMTSL);
writel(0x0, g_decom->regs + DECOM_LMTSH);
writel(DECOM_INT_MASK, g_decom->regs + DECOM_IEN);
writel(DECOM_ENABLE, g_decom->regs + DECOM_ENR);
return 0;
error:
clk_bulk_disable_unprepare(g_decom->num_clocks, g_decom->clocks);
return ret;
}
EXPORT_SYMBOL(rk_decom_start);
static irqreturn_t rk_decom_irq_handler(int irq, void *priv)
{
struct rk_decom *rk_dec = priv;
u32 irq_status;
u32 decom_status;
irq_status = readl(rk_dec->regs + DECOM_ISR);
/* clear interrupts */
writel(irq_status, rk_dec->regs + DECOM_ISR);
if (irq_status & DECOM_STOP) {
decom_status = readl(rk_dec->regs + DECOM_STAT);
if (decom_status & DECOM_COMPLETE) {
g_decom_complete = true;
g_decom_data_len = readl(rk_dec->regs + DECOM_TSIZEH);
g_decom_data_len = (g_decom_data_len << 32) |
readl(rk_dec->regs + DECOM_TSIZEL);
wake_up(&g_decom_wait);
if (rk_dec->mem_start)
dev_info(rk_dec->dev,
"decom completed, decom_data_len = %llu\n",
g_decom_data_len);
} else {
dev_info(rk_dec->dev,
"decom failed, irq_status = 0x%x, decom_status = 0x%x, try again !\n",
irq_status, decom_status);
print_hex_dump(KERN_WARNING, "", DUMP_PREFIX_OFFSET,
32, 4, rk_dec->regs, 0x128, false);
if (g_decom_noblocking) {
dev_info(rk_dec->dev, "decom failed and exit in noblocking mode.");
writel(DECOM_DISABLE, rk_dec->regs + DECOM_ENR);
writel(0, g_decom->regs + DECOM_IEN);
g_decom_complete = true;
g_decom_data_len = 0;
g_decom_noblocking = false;
wake_up(&g_decom_wait);
} else {
writel(DECOM_ENABLE, rk_dec->regs + DECOM_ENR);
}
}
}
return IRQ_WAKE_THREAD;
}
static irqreturn_t rk_decom_irq_thread(int irq, void *priv)
{
struct rk_decom *rk_dec = priv;
if (g_decom_complete) {
void *start, *end;
if (rk_dec->mem_start) {
/*
* Now it is safe to free reserve memory that
* store the origin ramdisk file
*/
start = phys_to_virt(rk_dec->mem_start);
end = start + rk_dec->mem_size;
free_reserved_area(start, end, -1, "ramdisk gzip archive");
rk_dec->mem_start = 0;
}
clk_bulk_disable_unprepare(rk_dec->num_clocks, rk_dec->clocks);
}
return IRQ_HANDLED;
}
static int __init rockchip_decom_probe(struct platform_device *pdev)
{
struct rk_decom *rk_dec;
struct resource *res = NULL;
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct device_node *mem;
struct resource reg;
int ret = 0;
rk_dec = devm_kzalloc(dev, sizeof(*rk_dec), GFP_KERNEL);
if (!rk_dec)
return -ENOMEM;
rk_dec->dev = dev;
rk_dec->irq = platform_get_irq(pdev, 0);
if (rk_dec->irq < 0) {
dev_err(dev, "failed to get rk_dec irq\n");
return -ENOENT;
}
mem = of_parse_phandle(np, "memory-region", 0);
if (!mem) {
dev_err(dev, "missing \"memory-region\" property\n");
return -ENODEV;
}
ret = of_address_to_resource(mem, 0, &reg);
of_node_put(mem);
if (ret) {
dev_err(dev, "missing \"reg\" property\n");
return -ENODEV;
}
rk_dec->mem_start = reg.start;
rk_dec->mem_size = resource_size(&reg);
rk_dec->num_clocks = devm_clk_bulk_get_all(dev, &rk_dec->clocks);
if (rk_dec->num_clocks < 0) {
dev_err(dev, "failed to get decompress clock\n");
return -ENODEV;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
rk_dec->regs = devm_ioremap_resource(dev, res);
if (IS_ERR(rk_dec->regs)) {
ret = PTR_ERR(rk_dec->regs);
goto disable_clk;
}
dev_set_drvdata(dev, rk_dec);
rk_dec->reset = devm_reset_control_get_exclusive(dev, "dresetn");
if (IS_ERR(rk_dec->reset)) {
ret = PTR_ERR(rk_dec->reset);
if (ret != -ENOENT)
return ret;
dev_dbg(dev, "no reset control found\n");
rk_dec->reset = NULL;
}
ret = devm_request_threaded_irq(dev, rk_dec->irq, rk_decom_irq_handler,
rk_decom_irq_thread, IRQF_ONESHOT,
dev_name(dev), rk_dec);
if (ret < 0) {
dev_err(dev, "failed to attach decompress irq\n");
goto disable_clk;
}
g_decom = rk_dec;
wake_up(&decom_init_done);
return 0;
disable_clk:
clk_bulk_disable_unprepare(rk_dec->num_clocks, rk_dec->clocks);
return ret;
}
#ifdef CONFIG_OF
static const struct of_device_id rockchip_decom_dt_match[] = {
{ .compatible = "rockchip,hw-decompress" },
{},
};
#endif
static struct platform_driver rk_decom_driver = {
.driver = {
.name = "rockchip_hw_decompress",
.of_match_table = rockchip_decom_dt_match,
},
};
static int __init rockchip_hw_decompress_init(void)
{
struct device_node *node;
node = of_find_matching_node(NULL, rockchip_decom_dt_match);
if (node) {
of_platform_device_create(node, NULL, NULL);
of_node_put(node);
return platform_driver_probe(&rk_decom_driver, rockchip_decom_probe);
}
return 0;
}
pure_initcall(rockchip_hw_decompress_init);
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