/*
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* drivers/char/dump_reg/dump_reg.c
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*
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* Copyright(c) 2015-2018 Allwinnertech Co., Ltd.
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* http://www.allwinnertech.com
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*
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* Author: Liugang <liugang@allwinnertech.com>
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* Xiafeng <xiafeng@allwinnertech.com>
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*
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* dump registers sysfs driver
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
|
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/kdev_t.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/miscdevice.h>
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#include <linux/seq_file.h>
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#include <asm/memory.h>
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#include "dump_reg.h"
|
|
#ifdef CONFIG_ARM64
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#define SUNXI_IO_PHYS_BASE 0x01000000
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#if defined(CONFIG_ARCH_SUN50IW3) \
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|| defined(CONFIG_ARCH_SUN50IW6) \
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|| defined(CONFIG_ARCH_SUN50IW8) \
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|| defined(CONFIG_ARCH_SUN50IW9) \
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|| defined(CONFIG_ARCH_SUN50IW10)
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#define SUNXI_IO_SIZE (SZ_128M + SZ_16M)
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#else
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#define SUNXI_IO_SIZE SZ_16M /* 16MB(Max) */
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#endif
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#define SUNXI_PLAT_PHYS_OFFSET 0x40000000UL
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#define SUNXI_IOMEM_VASE 0xffffff8000000000UL
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#define SUNXI_IOMEM_SIZE SZ_2G
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#define SUNXI_MEM_PHYS_VASE 0xffffffc000000000UL
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#define PRINT_ADDR_FMT "0x%016lx"
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#else
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#define SUNXI_PLAT_PHYS_OFFSET 0x40000000UL
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#define SUNXI_IO_PHYS_BASE SUNXI_IO_PBASE
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#define SUNXI_MEM_PHYS_VASE PAGE_OFFSET
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#define PRINT_ADDR_FMT "0x%08lx"
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#endif
|
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#undef READ
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#undef WRITE
|
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struct dump_reg {
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unsigned long pst_addr; /* start reg addr */
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unsigned long ped_addr; /* end reg addr */
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void __iomem *vaddr;
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};
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struct dump_struct {
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struct dump_reg dump;
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/* some registers' operate method maybe different */
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void __iomem *(*remap)(phys_addr_t phys_addr, size_t size);
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void (*unmap)(void __iomem *addr);
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void __iomem *(*phys2virt)(struct dump_reg *dump, unsigned long addr);
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u32 (*read)(void __iomem *addr);
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void (*write)(u32 val, void __iomem *addr);
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};
|
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/* for read and write in byte/word mode */
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static unsigned int rw_byte_mode;
|
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/* for dump_reg class */
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static struct dump_reg dump_para;
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static struct write_group *wt_group;
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static struct compare_group *cmp_group;
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static u32 READ(void __iomem *addr)
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{
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if (rw_byte_mode)
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return readb(addr);
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else
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return readl(addr);
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}
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static void WRITE(u32 val, void __iomem *addr)
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{
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if (rw_byte_mode)
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writeb(val, addr);
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else
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writel(val, addr);
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}
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static void __iomem *REMAPIO(phys_addr_t phys_addr, size_t size)
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{
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pr_debug("%s,%d, addr:%p, size:%zx\n", __func__, __LINE__,
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(void *)phys_addr, size);
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return ioremap(phys_addr, size);
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}
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static void UNMAPIO(void __iomem *addr)
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{
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pr_debug("%s,%d, addr:%p\n", __func__, __LINE__, addr);
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|
iounmap(addr);
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}
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static void __iomem *REMAPMEM(phys_addr_t phys_addr, size_t size)
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{
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pr_debug("%s,%d, addr:%p, size:%zx\n", __func__, __LINE__,
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(void *)phys_addr, size);
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return (void __iomem *)phys_to_virt(phys_addr);
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}
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static void __iomem *GET_VADDR(struct dump_reg *dump, unsigned long addr)
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{
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unsigned long offset;
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unsigned long raddr;
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raddr = (unsigned long)(dump->vaddr);
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offset = addr - dump->pst_addr;
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raddr = raddr + offset;
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return (void __iomem *)raddr;
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}
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static const struct dump_struct dump_table[] = {
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{
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.dump = {
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.pst_addr = SUNXI_IO_PHYS_BASE,
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.ped_addr = SUNXI_IO_PHYS_BASE + SUNXI_IO_SIZE,
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.vaddr = NULL,
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},
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.remap = REMAPIO,
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.unmap = UNMAPIO,
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.phys2virt = GET_VADDR,
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.read = READ,
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.write = WRITE,
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},
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{
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.dump = {
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.pst_addr = SUNXI_PLAT_PHYS_OFFSET,
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.ped_addr = SUNXI_PLAT_PHYS_OFFSET + SZ_1G,
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.vaddr = NULL,
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},
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.remap = REMAPMEM,
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.unmap = NULL,
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.phys2virt = GET_VADDR,
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.read = READ,
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.write = WRITE,
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},
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#if defined(SUNXI_IOMEM_VASE)
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{
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.dump = {
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.pst_addr = (unsigned long)SUNXI_IOMEM_VASE,
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.ped_addr =
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(unsigned long)SUNXI_IOMEM_VASE + SUNXI_IOMEM_SIZE,
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.vaddr = NULL,
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},
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.remap = NULL,
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.unmap = NULL,
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.phys2virt = GET_VADDR,
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.read = READ,
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.write = WRITE,
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},
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#endif
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{
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.dump = {
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.pst_addr = SUNXI_MEM_PHYS_VASE,
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#ifdef CONFIG_ARM64
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.ped_addr = SUNXI_MEM_PHYS_VASE + SZ_2G,
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#else
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.ped_addr = SUNXI_MEM_PHYS_VASE + SZ_1G - 1,
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#endif
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.vaddr = NULL,
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},
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.remap = NULL,
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.unmap = NULL,
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.phys2virt = GET_VADDR,
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.read = READ,
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.write = WRITE,
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},
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};
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/**
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* __addr_valid - check if the addr is valid.
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* @addr: addr to judge.
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*
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* return index if the addr is register addr, -ENXIO if not.
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*/
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static int __addr_valid(unsigned long addr)
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{
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int i;
|
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for (i = 0; i < ARRAY_SIZE(dump_table); i++)
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if (addr >= dump_table[i].dump.pst_addr &&
|
addr < dump_table[i].dump.ped_addr)
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return i;
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return -ENXIO;
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}
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/**
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* __dump_regs_ex - dump a range of registers' value, copy to buf.
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* @reg: start and end address of registers.
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* @buf: store the dump info.
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*
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* return bytes written to buf, <=0 indicate err
|
*/
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static ssize_t __dump_regs_ex(struct dump_reg *reg, char *buf, ssize_t len)
|
{
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int index;
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ssize_t cnt = 0;
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unsigned long paddr;
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const struct dump_struct *dump;
|
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reg->pst_addr &= (~0x3UL);
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reg->ped_addr &= (~0x3UL);
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index = __addr_valid(reg->pst_addr);
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if ((index < 0) || (index != __addr_valid(reg->ped_addr)) ||
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(buf == NULL)) {
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pr_err("%s,%d err, invalid para, index:%d, start:0x%lx, end:0x%lx, buf:0x%p\n",
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__func__, __LINE__, index,
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reg->pst_addr, reg->ped_addr, buf);
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return -EIO;
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}
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dump = &dump_table[index];
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if (dump->remap)
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reg->vaddr = dump->remap(reg->pst_addr, reg->ped_addr -
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reg->pst_addr + sizeof(unsigned long));
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else
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reg->vaddr = (void __iomem *)reg->pst_addr;
|
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/* only one to dump, so, we did not print address for
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* open("/sys/class/...") app call
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*/
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if (reg->pst_addr == reg->ped_addr) {
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cnt = sprintf(buf, "0x%08x\n", dump->read(reg->vaddr));
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goto out;
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}
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for (paddr = (reg->pst_addr & ~0x0F); paddr <= reg->ped_addr;
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paddr += 4) {
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if (!(paddr & 0x0F))
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cnt +=
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snprintf(buf + cnt, len - cnt,
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"\n" PRINT_ADDR_FMT ":", paddr);
|
|
if (cnt >= len) {
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pr_warn("Range too large, strings buffer overflow\n");
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cnt = len;
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goto out;
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}
|
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if (paddr < reg->pst_addr)
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/* "0x12345678 ", 11 space */
|
cnt += snprintf(buf + cnt, len - cnt, " ");
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else
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cnt += snprintf(buf + cnt, len - cnt, " 0x%08x",
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dump->read(dump->
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phys2virt(reg, paddr)));
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}
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cnt += snprintf(buf + cnt, len - cnt, "\n");
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pr_debug("%s,%d, start:0x%lx, end:0x%lx, return:%zd\n", __func__,
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__LINE__, reg->pst_addr, reg->ped_addr, cnt);
|
|
out:
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if (dump->unmap)
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dump->unmap(reg->vaddr);
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return cnt;
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}
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/**
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* __parse_dump_str - parse the input string for dump attri.
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* @buf: the input string, eg: "0x01c20000,0x01c20300".
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* @size: buf size.
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* @start: store the start reg's addr parsed from buf, eg 0x01c20000.
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* @end: store the end reg's addr parsed from buf, eg 0x01c20300.
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*
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* return 0 if success, otherwise failed.
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*/
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static int __parse_dump_str(const char *buf, size_t size,
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unsigned long *start, unsigned long *end)
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{
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char *ptr = NULL;
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char *ptr2 = (char *)buf;
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int ret = 0, times = 0;
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/* Support single address mode, some time it haven't ',' */
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next:
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/*
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* Default dump only one register(*start =*end).
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* If ptr is not NULL, we will cover the default value of end.
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*/
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if (times == 1)
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*start = *end;
|
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if (!ptr2 || (ptr2 - buf) >= size)
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goto out;
|
|
ptr = ptr2;
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ptr2 = strnchr(ptr, size - (ptr - buf), ',');
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if (ptr2) {
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*ptr2 = '\0';
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ptr2++;
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}
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ptr = strim(ptr);
|
if (!strlen(ptr))
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goto next;
|
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ret = kstrtoul(ptr, 16, end);
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if (!ret) {
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times++;
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goto next;
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} else
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pr_warn("String syntax errors: \"%s\"\n", ptr);
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out:
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return ret;
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}
|
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/**
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* __write_show - dump a register's value, copy to buf.
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* @pgroup: the addresses to read.
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* @buf: store the dump info.
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*
|
* return bytes written to buf, <=0 indicate err.
|
*/
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static ssize_t __write_show(struct write_group *pgroup, char *buf, ssize_t len)
|
{
|
#ifdef CONFIG_ARM64
|
#define WR_PRINT_FMT "reg to_write after_write\n"
|
#else
|
#define WR_PRINT_FMT "reg to_write after_write\n"
|
#endif
|
#define WR_DATA_FMT PRINT_ADDR_FMT" 0x%08x %s"
|
|
int i = 0;
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ssize_t cnt = 0;
|
unsigned long reg = 0;
|
u32 val;
|
u8 rval_buf[16];
|
struct dump_reg dump_reg;
|
|
if (!pgroup) {
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pr_err("%s,%d err, pgroup is NULL!\n", __func__, __LINE__);
|
goto end;
|
}
|
|
cnt += snprintf(buf, len - cnt, WR_PRINT_FMT);
|
if (cnt > len) {
|
cnt = -EINVAL;
|
goto end;
|
}
|
|
for (i = 0; i < pgroup->num; i++) {
|
reg = pgroup->pitem[i].reg_addr;
|
val = pgroup->pitem[i].val;
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dump_reg.pst_addr = reg;
|
dump_reg.ped_addr = reg;
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if (__dump_regs_ex(&dump_reg, rval_buf, sizeof(rval_buf)) < 0)
|
return -EINVAL;
|
|
cnt +=
|
snprintf(buf + cnt, len - cnt, WR_DATA_FMT, reg, val,
|
rval_buf);
|
if (cnt > len) {
|
cnt = len;
|
goto end;
|
}
|
}
|
|
end:
|
return cnt;
|
}
|
|
/**
|
* __parse_write_str - parse the input string for write attri.
|
* @str: string to be parsed, eg: "0x01c20818 0x55555555".
|
* @reg_addr: store the reg address. eg: 0x01c20818.
|
* @val: store the expect value. eg: 0x55555555.
|
*
|
* return 0 if success, otherwise failed.
|
*/
|
static int __parse_write_str(char *str, unsigned long *reg_addr, u32 *val)
|
{
|
char *ptr = str;
|
char *tstr = NULL;
|
int ret = 0;
|
|
/*
|
* Skip the leading whitespace, find the true split symbol.
|
* And it must be 'address value'.
|
*/
|
tstr = strim(str);
|
ptr = strchr(tstr, ' ');
|
if (!ptr)
|
return -EINVAL;
|
|
/*
|
* Replaced split symbol with a %NUL-terminator temporary.
|
* Will be fixed at end.
|
*/
|
*ptr = '\0';
|
ret = kstrtoul(tstr, 16, reg_addr);
|
if (ret)
|
goto out;
|
|
ret = kstrtou32(skip_spaces(ptr + 1), 16, val);
|
|
out:
|
return ret;
|
}
|
|
/**
|
* __write_item_init - init for write attri. parse input string,
|
* and construct write struct.
|
* @ppgroup: store the struct allocated, the struct contains items parsed from
|
* input buf.
|
* @buf: input string, eg: "0x01c20800 0x00000031,0x01c20818 0x55555555,...".
|
* @size: buf size.
|
*
|
* return 0 if success, otherwise failed.
|
*/
|
static int __write_item_init(struct write_group **ppgroup, const char *buf,
|
size_t size)
|
{
|
char *ptr, *ptr2;
|
unsigned long addr = 0;
|
u32 val;
|
struct write_group *pgroup;
|
|
/* alloc item buffer */
|
pgroup = kmalloc(sizeof(struct write_group), GFP_KERNEL);
|
if (!pgroup)
|
return -ENOMEM;
|
|
pgroup->pitem = kmalloc(sizeof(struct write_item) * MAX_WRITE_ITEM,
|
GFP_KERNEL);
|
if (!pgroup->pitem) {
|
kfree(pgroup);
|
return -ENOMEM;
|
}
|
|
pgroup->num = 0;
|
ptr = (char *)buf;
|
do {
|
ptr2 = strchr(ptr, ',');
|
if (ptr2)
|
*ptr2 = '\0';
|
|
if (!__parse_write_str(ptr, &addr, &val)) {
|
pgroup->pitem[pgroup->num].reg_addr = addr;
|
pgroup->pitem[pgroup->num].val = val;
|
pgroup->num++;
|
} else
|
pr_err("%s: Failed to parse string: %s\n", __func__,
|
ptr);
|
|
if (!ptr2)
|
break;
|
|
ptr = ptr2 + 1;
|
*ptr2 = ',';
|
|
} while (pgroup->num <= MAX_WRITE_ITEM);
|
|
/* free buffer if no valid item */
|
if (pgroup->num == 0) {
|
kfree(pgroup->pitem);
|
kfree(pgroup);
|
return -EINVAL;
|
}
|
|
*ppgroup = pgroup;
|
return 0;
|
}
|
|
/**
|
* __write_item_deinit - reled_addrse memory that cred_addrted by
|
* __write_item_init.
|
* @pgroup: the write struct allocated in __write_item_init.
|
*/
|
static void __write_item_deinit(struct write_group *pgroup)
|
{
|
if (pgroup != NULL) {
|
if (pgroup->pitem != NULL)
|
kfree(pgroup->pitem);
|
kfree(pgroup);
|
}
|
}
|
|
/**
|
* __compare_regs_ex - dump a range of registers' value, copy to buf.
|
* @pgroup: addresses of registers.
|
* @buf: store the dump info.
|
*
|
* return bytes written to buf, <= 0 indicate err.
|
*/
|
static ssize_t __compare_regs_ex(struct compare_group *pgroup, char *buf,
|
ssize_t len)
|
{
|
#ifdef CONFIG_ARM64
|
#define CMP_PRINT_FMT "reg expect actual mask result\n"
|
#else
|
#define CMP_PRINT_FMT "reg expect actual mask result\n"
|
#endif
|
#define CMP_DATAO_FMT PRINT_ADDR_FMT" 0x%08x 0x%08x 0x%08x OK\n"
|
#define CMP_DATAE_FMT PRINT_ADDR_FMT" 0x%08x 0x%08x 0x%08x ERR\n"
|
|
int i;
|
ssize_t cnt = 0;
|
unsigned long reg;
|
u32 expect, actual, mask;
|
u8 actualb[16];
|
struct dump_reg dump_reg;
|
|
if (!pgroup) {
|
pr_err("%s,%d err, pgroup is NULL!\n", __func__, __LINE__);
|
goto end;
|
}
|
|
cnt += snprintf(buf, len - cnt, CMP_PRINT_FMT);
|
if (cnt > len) {
|
cnt = -EINVAL;
|
goto end;
|
}
|
|
for (i = 0; i < pgroup->num; i++) {
|
reg = pgroup->pitem[i].reg_addr;
|
expect = pgroup->pitem[i].val_expect;
|
dump_reg.pst_addr = reg;
|
dump_reg.ped_addr = reg;
|
if (__dump_regs_ex(&dump_reg, actualb, sizeof(actualb)) < 0)
|
return -EINVAL;
|
|
if (kstrtou32(actualb, 16, &actual))
|
return -EINVAL;
|
|
mask = pgroup->pitem[i].val_mask;
|
if ((actual & mask) == (expect & mask))
|
cnt +=
|
snprintf(buf + cnt, len - cnt, CMP_DATAO_FMT, reg,
|
expect, actual, mask);
|
else
|
cnt +=
|
snprintf(buf + cnt, len - cnt, CMP_DATAE_FMT, reg,
|
expect, actual, mask);
|
if (cnt > len) {
|
cnt = -EINVAL;
|
goto end;
|
}
|
}
|
|
end:
|
return cnt;
|
}
|
|
/**
|
* __compare_item_deinit - reled_addrse memory that cred_addrted by
|
* __compare_item_init.
|
* @pgroup: the compare struct allocated in __compare_item_init.
|
*/
|
static void __compare_item_deinit(struct compare_group *pgroup)
|
{
|
if (pgroup) {
|
kfree(pgroup->pitem);
|
kfree(pgroup);
|
}
|
}
|
|
/**
|
* __parse_compare_str - parse the input string for compare attri.
|
* @str: string to be parsed, eg: "0x01c20000 0x80000011 0x00000011".
|
* @reg_addr: store the reg address. eg: 0x01c20000.
|
* @val_expect: store the expect value. eg: 0x80000011.
|
* @val_mask: store the mask value. eg: 0x00000011.
|
*
|
* return 0 if success, otherwise failed.
|
*/
|
static int __parse_compare_str(char *str, unsigned long *reg_addr,
|
u32 *val_expect, u32 *val_mask)
|
{
|
unsigned long result_addr[3] = { 0 };
|
char *ptr = str;
|
char *ptr2 = NULL;
|
int i, ret = 0;
|
|
for (i = 0; i < ARRAY_SIZE(result_addr); i++) {
|
ptr = skip_spaces(ptr);
|
ptr2 = strchr(ptr, ' ');
|
if (ptr2)
|
*ptr2 = '\0';
|
|
ret = kstrtoul(ptr, 16, &result_addr[i]);
|
if (!ptr2)
|
break;
|
|
*ptr2 = ' ';
|
|
if (ret)
|
break;
|
|
ptr = ptr2 + 1;
|
}
|
|
*reg_addr = result_addr[0];
|
*val_expect = (u32) result_addr[1];
|
*val_mask = (u32) result_addr[2];
|
|
return ret;
|
}
|
|
/**
|
* __compare_item_init - init for compare attri. parse input string,
|
* and construct compare struct.
|
* @ppgroup: store the struct allocated, the struct contains items parsed from
|
* input buf.
|
* @buf: input string,
|
* eg: "0x01c20000 0x80000011 0x00000011,0x01c20004 0x0000c0a4 0x0000c0a0,...".
|
* @size: buf size.
|
*
|
* return 0 if success, otherwise failed.
|
*/
|
static int __compare_item_init(struct compare_group **ppgroup,
|
const char *buf, size_t size)
|
{
|
char *ptr, *ptr2;
|
unsigned long addr = 0;
|
u32 val_expect = 0, val_mask = 0;
|
struct compare_group *pgroup = NULL;
|
|
/* alloc item buffer */
|
pgroup = kmalloc(sizeof(struct compare_group), GFP_KERNEL);
|
if (pgroup == NULL)
|
return -EINVAL;
|
|
pgroup->pitem = kmalloc(sizeof(struct compare_item) * MAX_COMPARE_ITEM,
|
GFP_KERNEL);
|
if (pgroup->pitem == NULL) {
|
kfree(pgroup);
|
return -EINVAL;
|
}
|
|
pgroup->num = 0;
|
|
/* get item from buf */
|
ptr = (char *)buf;
|
do {
|
ptr2 = strchr(ptr, ',');
|
if (ptr2)
|
*ptr2 = '\0';
|
|
if (!__parse_compare_str(ptr, &addr, &val_expect, &val_mask)) {
|
pgroup->pitem[pgroup->num].reg_addr = addr;
|
pgroup->pitem[pgroup->num].val_expect = val_expect;
|
pgroup->pitem[pgroup->num].val_mask = val_mask;
|
pgroup->num++;
|
} else
|
pr_err("%s: Failed to parse string: %s\n", __func__,
|
ptr);
|
|
if (!ptr2)
|
break;
|
|
*ptr2 = ',';
|
ptr = ptr2 + 1;
|
|
} while (pgroup->num <= MAX_COMPARE_ITEM);
|
|
/* free buffer if no valid item */
|
if (pgroup->num == 0) {
|
kfree(pgroup->pitem);
|
kfree(pgroup);
|
return -EINVAL;
|
}
|
*ppgroup = pgroup;
|
|
return 0;
|
}
|
|
/**
|
* dump_show - show func of dump attribute.
|
* @dev: class ptr.
|
* @attr: attribute ptr.
|
* @buf: the input buf which contain the start and end reg.
|
* eg: "0x01c20000,0x01c20100\n".
|
*
|
* return size written to the buf, otherwise failed.
|
*/
|
static ssize_t
|
dump_show(struct class *class, struct class_attribute *attr, char *buf)
|
{
|
return __dump_regs_ex(&dump_para, buf, PAGE_SIZE);
|
}
|
|
static ssize_t
|
dump_store(struct class *class, struct class_attribute *attr,
|
const char *buf, size_t count)
|
{
|
int index;
|
unsigned long start_reg = 0;
|
unsigned long end_reg = 0;
|
|
if (__parse_dump_str(buf, count, &start_reg, &end_reg)) {
|
pr_err("%s,%d err, invalid para!\n", __func__, __LINE__);
|
goto err;
|
}
|
|
index = __addr_valid(start_reg);
|
if ((index < 0) || (index != __addr_valid(end_reg))) {
|
pr_err("%s,%d err, invalid para!\n", __func__, __LINE__);
|
goto err;
|
}
|
|
dump_para.pst_addr = start_reg;
|
dump_para.ped_addr = end_reg;
|
pr_debug("%s,%d, start_reg:" PRINT_ADDR_FMT ", end_reg:" PRINT_ADDR_FMT
|
"\n", __func__, __LINE__, start_reg, end_reg);
|
|
return count;
|
|
err:
|
dump_para.pst_addr = 0;
|
dump_para.ped_addr = 0;
|
|
return -EINVAL;
|
}
|
|
static ssize_t
|
write_show(struct class *class, struct class_attribute *attr, char *buf)
|
{
|
/* display write result */
|
return __write_show(wt_group, buf, PAGE_SIZE);
|
}
|
|
static ssize_t
|
write_store(struct class *class, struct class_attribute *attr,
|
const char *buf, size_t count)
|
{
|
int i;
|
int index;
|
unsigned long reg;
|
u32 val;
|
const struct dump_struct *dump;
|
struct dump_reg write_para;
|
|
/* free if not NULL */
|
if (wt_group) {
|
__write_item_deinit(wt_group);
|
wt_group = NULL;
|
}
|
|
/* parse input buf for items that will be dumped */
|
if (__write_item_init(&wt_group, buf, count) < 0)
|
return -EINVAL;
|
|
/**
|
* write reg
|
* it is better if the regs been remaped and unmaped only once,
|
* but we map everytime for the range between min and max address
|
* maybe too large.
|
*/
|
for (i = 0; i < wt_group->num; i++) {
|
reg = wt_group->pitem[i].reg_addr;
|
write_para.pst_addr = reg;
|
val = wt_group->pitem[i].val;
|
index = __addr_valid(reg);
|
dump = &dump_table[index];
|
if (dump->remap)
|
write_para.vaddr = dump->remap(reg, 4);
|
else
|
write_para.vaddr = (void __iomem *)reg;
|
dump->write(val, dump->phys2virt(&write_para, reg));
|
if (dump->unmap)
|
dump->unmap(write_para.vaddr);
|
}
|
|
return count;
|
}
|
|
static ssize_t
|
compare_show(struct class *class, struct class_attribute *attr, char *buf)
|
{
|
/* dump the items */
|
return __compare_regs_ex(cmp_group, buf, PAGE_SIZE);
|
}
|
|
static ssize_t
|
compare_store(struct class *class, struct class_attribute *attr,
|
const char *buf, size_t count)
|
{
|
/* free if struct not null */
|
if (cmp_group) {
|
__compare_item_deinit(cmp_group);
|
cmp_group = NULL;
|
}
|
|
/* parse input buf for items that will be dumped */
|
if (__compare_item_init(&cmp_group, buf, count) < 0)
|
return -EINVAL;
|
|
return count;
|
}
|
|
static ssize_t
|
rw_byte_show(struct class *class, struct class_attribute *attr, char *buf)
|
{
|
return sprintf(buf, "read/write mode: %u(%s)\n", rw_byte_mode,
|
rw_byte_mode ? "byte" : "word");
|
}
|
|
static ssize_t
|
rw_byte_store(struct class *class, struct class_attribute *attr,
|
const char *buf, size_t count)
|
{
|
unsigned long value;
|
int ret;
|
|
ret = kstrtoul(buf, 10, &value);
|
if (!ret && (value > 1)) {
|
pr_err("%s,%d err, invalid para!\n", __func__, __LINE__);
|
goto out;
|
}
|
rw_byte_mode = value;
|
out:
|
return count;
|
}
|
|
static struct class_attribute dump_class_attrs[] = {
|
__ATTR(dump, S_IWUSR | S_IRUGO, dump_show, dump_store),
|
__ATTR(write, S_IWUSR | S_IRUGO, write_show, write_store),
|
__ATTR(compare, S_IWUSR | S_IRUGO, compare_show, compare_store),
|
__ATTR(rw_byte, S_IWUSR | S_IRUGO, rw_byte_show, rw_byte_store),
|
__ATTR_NULL,
|
};
|
|
static struct class dump_class = {
|
.name = "sunxi_dump",
|
.owner = THIS_MODULE,
|
.class_attrs = dump_class_attrs,
|
};
|
|
static int __init dump_class_init(void)
|
{
|
int status;
|
|
status = class_register(&dump_class);
|
if (status < 0)
|
pr_err("%s,%d err, status:%d\n", __func__, __LINE__, status);
|
else
|
pr_info("%s,%d, success\n", __func__, __LINE__);
|
|
return status;
|
}
|
|
postcore_initcall(dump_class_init);
|
|
#ifdef CONFIG_DUMP_REG_MISC
|
/* for dump_reg misc driver */
|
static struct dump_reg misc_dump_para;
|
static struct write_group *misc_wt_group;
|
static struct compare_group *misc_cmp_group;
|
|
static ssize_t
|
misc_dump_show(struct device *dev, struct device_attribute *attr, char *buf)
|
{
|
return __dump_regs_ex(&misc_dump_para, buf, PAGE_SIZE);
|
}
|
|
static ssize_t
|
misc_dump_store(struct device *dev, struct device_attribute *attr,
|
const char *buf, size_t size)
|
{
|
int index;
|
unsigned long start_reg = 0;
|
unsigned long end_reg = 0;
|
|
if (__parse_dump_str(buf, size, &start_reg, &end_reg)) {
|
pr_err("%s,%d err, invalid para!\n", __func__, __LINE__);
|
goto err;
|
}
|
|
index = __addr_valid(start_reg);
|
if ((index < 0) || (index != __addr_valid(end_reg))) {
|
pr_err("%s,%d err, invalid para!\n", __func__, __LINE__);
|
goto err;
|
}
|
|
misc_dump_para.pst_addr = start_reg;
|
misc_dump_para.ped_addr = end_reg;
|
pr_debug("%s,%d, start_reg:" PRINT_ADDR_FMT ", end_reg:" PRINT_ADDR_FMT
|
"\n", __func__, __LINE__, start_reg, end_reg);
|
|
return size;
|
|
err:
|
misc_dump_para.pst_addr = 0;
|
misc_dump_para.ped_addr = 0;
|
|
return -EINVAL;
|
}
|
|
static ssize_t
|
misc_write_show(struct device *dev, struct device_attribute *attr, char *buf)
|
{
|
/* display write result */
|
return __write_show(misc_wt_group, buf, PAGE_SIZE);
|
}
|
|
static ssize_t
|
misc_write_store(struct device *dev, struct device_attribute *attr,
|
const char *buf, size_t size)
|
{
|
int i;
|
int index;
|
unsigned long reg;
|
u32 val;
|
const struct dump_struct *dump;
|
struct dump_reg misc_write_para;
|
|
/* free if not NULL */
|
if (misc_wt_group) {
|
__write_item_deinit(misc_wt_group);
|
misc_wt_group = NULL;
|
}
|
|
/* parse input buf for items that will be dumped */
|
if (__write_item_init(&misc_wt_group, buf, size) < 0)
|
return -EINVAL;
|
|
/**
|
* write reg
|
* it is better if the regs been remaped and unmaped only once,
|
* but we map everytime for the range between min and max address
|
* maybe too large.
|
*/
|
for (i = 0; i < misc_wt_group->num; i++) {
|
reg = misc_wt_group->pitem[i].reg_addr;
|
misc_write_para.pst_addr = reg;
|
val = misc_wt_group->pitem[i].val;
|
index = __addr_valid(reg);
|
dump = &dump_table[index];
|
if (dump->remap)
|
misc_write_para.vaddr = dump->remap(reg, 4);
|
else
|
misc_write_para.vaddr = (void __iomem *)reg;
|
dump->write(val, dump->phys2virt(&misc_write_para, reg));
|
if (dump->unmap)
|
dump->unmap(misc_write_para.vaddr);
|
}
|
|
return size;
|
}
|
|
static ssize_t
|
misc_compare_show(struct device *dev, struct device_attribute *attr, char *buf)
|
{
|
/* dump the items */
|
return __compare_regs_ex(misc_cmp_group, buf, PAGE_SIZE);
|
}
|
|
static ssize_t
|
misc_compare_store(struct device *dev, struct device_attribute *attr,
|
const char *buf, size_t size)
|
{
|
/* free if struct not null */
|
if (misc_cmp_group) {
|
__compare_item_deinit(misc_cmp_group);
|
misc_cmp_group = NULL;
|
}
|
|
/* parse input buf for items that will be dumped */
|
if (__compare_item_init(&misc_cmp_group, buf, size) < 0)
|
return -EINVAL;
|
|
return size;
|
}
|
|
static DEVICE_ATTR(dump, S_IWUSR | S_IRUGO, misc_dump_show, misc_dump_store);
|
static DEVICE_ATTR(write, S_IWUSR | S_IRUGO, misc_write_show, misc_write_store);
|
static DEVICE_ATTR(compare, S_IWUSR | S_IRUGO, misc_compare_show,
|
misc_compare_store);
|
|
static struct attribute *misc_attributes[] = {
|
&dev_attr_dump.attr,
|
&dev_attr_write.attr,
|
&dev_attr_compare.attr,
|
NULL,
|
};
|
|
static struct attribute_group misc_attribute_group = {
|
.name = "rw",
|
.attrs = misc_attributes,
|
};
|
|
static struct miscdevice dump_reg_dev = {
|
.minor = MISC_DYNAMIC_MINOR,
|
.name = "sunxi-reg",
|
};
|
|
static int __init misc_dump_reg_init(void)
|
{
|
int err;
|
|
pr_info("misc dump reg init\n");
|
err = misc_register(&dump_reg_dev);
|
if (err) {
|
pr_err("dump register driver as misc device error!\n");
|
goto exit;
|
}
|
|
err = sysfs_create_group(&dump_reg_dev.this_device->kobj,
|
&misc_attribute_group);
|
if (err)
|
pr_err("dump register sysfs create group failed!\n");
|
|
exit:
|
return err;
|
}
|
|
static void __exit misc_dump_reg_exit(void)
|
{
|
pr_info("misc dump reg exit\n");
|
|
misc_deregister(&dump_reg_dev);
|
|
sysfs_remove_group(&(dump_reg_dev.this_device->kobj),
|
&misc_attribute_group);
|
}
|
|
module_init(misc_dump_reg_init);
|
module_exit(misc_dump_reg_exit);
|
#endif
|
|
MODULE_ALIAS("dump reg driver");
|
MODULE_LICENSE("GPL v2");
|
MODULE_AUTHOR("xiafeng <xiafeng@allwinnertech.com>");
|
MODULE_ALIAS("platform:dump reg");
|
MODULE_DESCRIPTION("dump registers driver");
|
