+++ /dev/null
-/*
- * Copyright (C) 2013-2015 ROCKCHIP, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/crc32.h>
-#include <linux/delay.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/rockchip/cpu.h>
-#include <linux/rockchip/iomap.h>
-#include <asm/compiler.h>
-#include <asm/psci.h>
-#include <asm/system_info.h>
-#include "efuse.h"
-
-#ifdef CONFIG_ARM
-#define efuse_readl(offset) readl_relaxed(RK_EFUSE_VIRT + offset)
-#define efuse_writel(val, offset) writel_relaxed(val, RK_EFUSE_VIRT + offset)
-#endif
-
-static u8 efuse_buf[32] = {};
-
-struct rockchip_efuse {
- int (*get_leakage)(int ch);
- int (*get_temp)(int ch);
- int efuse_version;
- int process_version;
-};
-
-static struct rockchip_efuse efuse;
-
-#ifdef CONFIG_ARM64
-/****************************secure reg access****************************/
-
-#define SEC_REG_RW_SHT (0x0)
-#define SEC_REG_RD (0x0)
-#define SEC_REG_WR (0x1)
-
-#define SEC_REG_BITS_SHT (0x1)
-#define SEC_REG_32 (0x0)
-#define SEC_REG_64 (0x2)
-
-#define SEC_REG_RD_32 (SEC_REG_RD | SEC_REG_32)
-#define SEC_REG_RD_64 (SEC_REG_RD | SEC_REG_64)
-#define SEC_REG_WR_32 (SEC_REG_WR | SEC_REG_32)
-#define SEC_REG_WR_64 (SEC_REG_WR | SEC_REG_64)
-
-#define PSCI_SIP_ACCESS_REG (0x82000002)
-#define PSCI_SIP_RKTF_VER (0x82000001)
-
-static phys_addr_t efuse_phys;
-
-/*
- * arg2: rd/wr control, bit[0] 0-rd 1-rt, bit[1] 0-32bit, 1-64bit
- * arg1: base addr
- * arg0: read or write val
- * function_id: return fail/succes
- */
-static u32 reg_wr_fn_smc(u64 function_id, u64 arg0, u64 arg1, u64 arg2)
-{
- asm volatile(
- __asmeq("%0", "x0")
- __asmeq("%1", "x1")
- __asmeq("%2", "x2")
- __asmeq("%3", "x3")
- "smc #0\n"
- : "+r" (function_id), "+r" (arg0)
- : "r" (arg1), "r" (arg2));
-
- return function_id;
-}
-
-static u32 reg_rd_fn_smc(u64 function_id, u64 arg0, u64 arg1, u64 arg2,
- u64 *val)
-{
- asm volatile(
- __asmeq("%0", "x0")
- __asmeq("%1", "x1")
- __asmeq("%2", "x2")
- __asmeq("%3", "x3")
- "smc #0\n"
- : "+r" (function_id), "+r" (arg0)
- : "r" (arg1), "r" (arg2));
-
- *val = arg0;
-
- return function_id;
-}
-
-static u32 (*reg_wr_fn)(u64, u64, u64, u64) = reg_wr_fn_smc;
-static u32 (*reg_rd_fn)(u64, u64, u64, u64, u64 *) = reg_rd_fn_smc;
-
-static u32 secure_regs_rd_32(u64 addr_phy)
-{
- u64 val = 0;
-
- reg_rd_fn(PSCI_SIP_ACCESS_REG, 0, addr_phy, SEC_REG_RD_32, &val);
- return val;
-}
-
-static u32 secure_regs_wr_32(u64 addr_phy, u32 val)
-{
- u64 val_64 = val;
-
- return reg_wr_fn(PSCI_SIP_ACCESS_REG, val_64, addr_phy, SEC_REG_WR_32);
-}
-
-static u32 efuse_readl(u32 offset)
-{
- return secure_regs_rd_32(efuse_phys + offset);
-}
-
-static void efuse_writel(u32 val, u32 offset)
-{
- secure_regs_wr_32(efuse_phys + offset, val);
-}
-
-#define RKTF_VER_MAJOR(ver) (((ver) >> 16) & 0xffff)
-#define RKTF_VER_MINOR(ver) ((ver) & 0xffff)
-/* valid ver */
-#define RKTF_VLDVER_MAJOR (1)
-#define RKTF_VLDVER_MINOR (3)
-
-
-static int __init rockchip_tf_ver_check(void)
-{
- u64 val;
- u32 ver_val;
-
- ver_val = reg_rd_fn(PSCI_SIP_RKTF_VER, 0, 0, 0, &val);
- if (ver_val == 0xffffffff)
- goto ver_error;
-
- if ((RKTF_VER_MAJOR(ver_val) >= RKTF_VLDVER_MAJOR) &&
- (RKTF_VER_MINOR(ver_val) >= RKTF_VLDVER_MINOR))
- return 0;
-
-ver_error:
-
- pr_err("read tf version 0x%x!\n", ver_val);
-
- do {
- mdelay(1000);
- pr_err("trusted firmware need to update to(%d.%d) or is invaild!\n",
- RKTF_VLDVER_MAJOR, RKTF_VLDVER_MINOR);
- } while(1);
-
- return 0;
-}
-device_initcall_sync(rockchip_tf_ver_check);
-#endif
-
-static int rk3288_efuse_readregs(u32 addr, u32 length, u8 *buf)
-{
- int ret = length;
-
- if (!length)
- return 0;
- if (!buf)
- return 0;
-
- efuse_writel(EFUSE_CSB, REG_EFUSE_CTRL);
- efuse_writel(EFUSE_LOAD | EFUSE_PGENB, REG_EFUSE_CTRL);
- udelay(2);
- do {
- efuse_writel(efuse_readl(REG_EFUSE_CTRL) &
- (~(EFUSE_A_MASK << EFUSE_A_SHIFT)), REG_EFUSE_CTRL);
- efuse_writel(efuse_readl(REG_EFUSE_CTRL) |
- ((addr & EFUSE_A_MASK) << EFUSE_A_SHIFT),
- REG_EFUSE_CTRL);
- udelay(2);
- efuse_writel(efuse_readl(REG_EFUSE_CTRL) |
- EFUSE_STROBE, REG_EFUSE_CTRL);
- udelay(2);
- *buf = efuse_readl(REG_EFUSE_DOUT);
- efuse_writel(efuse_readl(REG_EFUSE_CTRL) &
- (~EFUSE_STROBE), REG_EFUSE_CTRL);
- udelay(2);
- buf++;
- addr++;
- } while (--length);
- udelay(2);
- efuse_writel(efuse_readl(REG_EFUSE_CTRL) | EFUSE_CSB, REG_EFUSE_CTRL);
- udelay(1);
-
- return ret;
-}
-
-static int __init rk3288_get_efuse_version(void)
-{
- int ret = efuse_buf[4] & (~(0x1 << 3));
- return ret;
-}
-
-static int __init rk3288_get_process_version(void)
-{
- int ret = efuse_buf[6]&0x0f;
-
- return ret;
-}
-
-static int rk3288_get_leakage(int ch)
-{
- if ((ch < 0) || (ch > 2))
- return 0;
-
- return efuse_buf[23+ch];
-}
-
-static void __init rk3288_set_system_serial(void)
-{
- int i;
- u8 buf[16];
-
- for (i = 0; i < 8; i++) {
- buf[i] = efuse_buf[8 + (i << 1)];
- buf[i + 8] = efuse_buf[7 + (i << 1)];
- }
-
- system_serial_low = crc32(0, buf, 8);
- system_serial_high = crc32(system_serial_low, buf + 8, 8);
-}
-
-int rk312x_efuse_readregs(u32 addr, u32 length, u8 *buf)
-{
- int ret = length;
-
- if (!length)
- return 0;
-
- efuse_writel(EFUSE_LOAD, REG_EFUSE_CTRL);
- udelay(2);
- do {
- efuse_writel(efuse_readl(REG_EFUSE_CTRL) &
- (~(EFUSE_A_MASK << RK312X_EFUSE_A_SHIFT)),
- REG_EFUSE_CTRL);
- efuse_writel(efuse_readl(REG_EFUSE_CTRL) |
- ((addr & EFUSE_A_MASK) << RK312X_EFUSE_A_SHIFT),
- REG_EFUSE_CTRL);
- udelay(2);
- efuse_writel(efuse_readl(REG_EFUSE_CTRL) |
- EFUSE_STROBE, REG_EFUSE_CTRL);
- udelay(2);
- *buf = efuse_readl(REG_EFUSE_DOUT);
- efuse_writel(efuse_readl(REG_EFUSE_CTRL) &
- (~EFUSE_STROBE), REG_EFUSE_CTRL);
- udelay(2);
- buf++;
- addr++;
- } while (--length);
- udelay(2);
- efuse_writel(efuse_readl(REG_EFUSE_CTRL) &
- (~EFUSE_LOAD) , REG_EFUSE_CTRL);
- udelay(1);
-
- return ret;
-}
-
-int rockchip_efuse_version(void)
-{
- return efuse.efuse_version;
-}
-
-int rockchip_process_version(void)
-{
- return efuse.process_version;
-}
-
-int rockchip_get_leakage(int ch)
-{
- int ret = 0;
-
- if (efuse.get_leakage) {
- return efuse.get_leakage(ch);
- } else {
- ret = rk3288_efuse_readregs(0, 32, efuse_buf);
- if (ret == 32)
- return efuse_buf[23+ch];
- }
- return 0;
-}
-
-int rockchip_efuse_get_temp_adjust(int ch)
-{
- int temp;
-
- if (efuse_buf[31] & 0x80)
- temp = -(efuse_buf[31] & 0x7f);
- else
- temp = efuse_buf[31];
-
- return temp;
-}
-
-static void __init rk3288_efuse_init(void)
-{
- int ret;
-
- ret = rk3288_efuse_readregs(0, 32, efuse_buf);
- if (ret == 32) {
- efuse.get_leakage = rk3288_get_leakage;
- efuse.efuse_version = rk3288_get_efuse_version();
- efuse.process_version = rk3288_get_process_version();
- rockchip_set_cpu_version((efuse_buf[6] >> 4) & 3);
- rk3288_set_system_serial();
- } else {
- pr_err("failed to read eFuse, return %d\n", ret);
- }
-}
-
-void __init rockchip_efuse_init(void)
-{
- int ret;
-
- if (cpu_is_rk3288() || cpu_is_rk3228()) {
- rk3288_efuse_init();
- } else if (cpu_is_rk312x()) {
- ret = rk312x_efuse_readregs(0, 32, efuse_buf);
- if (ret == 32)
- efuse.get_leakage = rk3288_get_leakage;
- else
- pr_err("failed to read eFuse, return %d\n", ret);
- }
-}
-
-#ifdef CONFIG_ARM64
-static int __init rockchip_efuse_probe(struct platform_device *pdev)
-{
- struct resource *regs;
-
- regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!regs) {
- dev_err(&pdev->dev, "failed to get I/O memory\n");
- return -ENODEV;
- }
- efuse_phys = regs->start;
-
- rk3288_efuse_init();
- return 0;
-}
-
-static const struct of_device_id rockchip_efuse_of_match[] = {
- { .compatible = "rockchip,rk3368-efuse-256", .data = NULL, },
- {},
-};
-
-static struct platform_driver rockchip_efuse_driver = {
- .driver = {
- .name = "efuse",
- .owner = THIS_MODULE,
- .of_match_table = of_match_ptr(rockchip_efuse_of_match),
- },
-};
-
-static int __init rockchip_efuse_module_init(void)
-{
- return platform_driver_probe(&rockchip_efuse_driver,
- rockchip_efuse_probe);
-}
-arch_initcall_sync(rockchip_efuse_module_init);
-#endif
projects / firefly-linux-kernel-4.4.55.git / blobdiff