1e3037485SYan-Hsuan Chuang // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2e3037485SYan-Hsuan Chuang /* Copyright(c) 2018-2019 Realtek Corporation
3e3037485SYan-Hsuan Chuang */
4e3037485SYan-Hsuan Chuang
55ad4d895STzu-En Huang #include <linux/iopoll.h>
65ad4d895STzu-En Huang
7e3037485SYan-Hsuan Chuang #include "main.h"
8e3037485SYan-Hsuan Chuang #include "efuse.h"
9e3037485SYan-Hsuan Chuang #include "reg.h"
10e3037485SYan-Hsuan Chuang #include "debug.h"
11e3037485SYan-Hsuan Chuang
12e3037485SYan-Hsuan Chuang #define RTW_EFUSE_BANK_WIFI 0x0
13e3037485SYan-Hsuan Chuang
switch_efuse_bank(struct rtw_dev * rtwdev)14e3037485SYan-Hsuan Chuang static void switch_efuse_bank(struct rtw_dev *rtwdev)
15e3037485SYan-Hsuan Chuang {
16e3037485SYan-Hsuan Chuang rtw_write32_mask(rtwdev, REG_LDO_EFUSE_CTRL, BIT_MASK_EFUSE_BANK_SEL,
17e3037485SYan-Hsuan Chuang RTW_EFUSE_BANK_WIFI);
18e3037485SYan-Hsuan Chuang }
19e3037485SYan-Hsuan Chuang
20e3037485SYan-Hsuan Chuang #define invalid_efuse_header(hdr1, hdr2) \
21e3037485SYan-Hsuan Chuang ((hdr1) == 0xff || (((hdr1) & 0x1f) == 0xf && (hdr2) == 0xff))
22e3037485SYan-Hsuan Chuang #define invalid_efuse_content(word_en, i) \
23e3037485SYan-Hsuan Chuang (((word_en) & BIT(i)) != 0x0)
24e3037485SYan-Hsuan Chuang #define get_efuse_blk_idx_2_byte(hdr1, hdr2) \
25e3037485SYan-Hsuan Chuang ((((hdr2) & 0xf0) >> 1) | (((hdr1) >> 5) & 0x07))
26e3037485SYan-Hsuan Chuang #define get_efuse_blk_idx_1_byte(hdr1) \
27e3037485SYan-Hsuan Chuang (((hdr1) & 0xf0) >> 4)
28e3037485SYan-Hsuan Chuang #define block_idx_to_logical_idx(blk_idx, i) \
29e3037485SYan-Hsuan Chuang (((blk_idx) << 3) + ((i) << 1))
30e3037485SYan-Hsuan Chuang
31e3037485SYan-Hsuan Chuang /* efuse header format
32e3037485SYan-Hsuan Chuang *
33e3037485SYan-Hsuan Chuang * | 7 5 4 0 | 7 4 3 0 | 15 8 7 0 |
34e3037485SYan-Hsuan Chuang * block[2:0] 0 1111 block[6:3] word_en[3:0] byte0 byte1
35e3037485SYan-Hsuan Chuang * | header 1 (optional) | header 2 | word N |
36e3037485SYan-Hsuan Chuang *
37e3037485SYan-Hsuan Chuang * word_en: 4 bits each word. 0 -> write; 1 -> not write
38e3037485SYan-Hsuan Chuang * N: 1~4, depends on word_en
39e3037485SYan-Hsuan Chuang */
rtw_dump_logical_efuse_map(struct rtw_dev * rtwdev,u8 * phy_map,u8 * log_map)40e3037485SYan-Hsuan Chuang static int rtw_dump_logical_efuse_map(struct rtw_dev *rtwdev, u8 *phy_map,
41e3037485SYan-Hsuan Chuang u8 *log_map)
42e3037485SYan-Hsuan Chuang {
43e3037485SYan-Hsuan Chuang u32 physical_size = rtwdev->efuse.physical_size;
44e3037485SYan-Hsuan Chuang u32 protect_size = rtwdev->efuse.protect_size;
45e3037485SYan-Hsuan Chuang u32 logical_size = rtwdev->efuse.logical_size;
46e3037485SYan-Hsuan Chuang u32 phy_idx, log_idx;
47e3037485SYan-Hsuan Chuang u8 hdr1, hdr2;
48e3037485SYan-Hsuan Chuang u8 blk_idx;
49e3037485SYan-Hsuan Chuang u8 word_en;
50e3037485SYan-Hsuan Chuang int i;
51e3037485SYan-Hsuan Chuang
52e3037485SYan-Hsuan Chuang for (phy_idx = 0; phy_idx < physical_size - protect_size;) {
53e3037485SYan-Hsuan Chuang hdr1 = phy_map[phy_idx];
54e3037485SYan-Hsuan Chuang hdr2 = phy_map[phy_idx + 1];
55e3037485SYan-Hsuan Chuang if (invalid_efuse_header(hdr1, hdr2))
56e3037485SYan-Hsuan Chuang break;
57e3037485SYan-Hsuan Chuang
58e3037485SYan-Hsuan Chuang if ((hdr1 & 0x1f) == 0xf) {
59e3037485SYan-Hsuan Chuang /* 2-byte header format */
60e3037485SYan-Hsuan Chuang blk_idx = get_efuse_blk_idx_2_byte(hdr1, hdr2);
61e3037485SYan-Hsuan Chuang word_en = hdr2 & 0xf;
62e3037485SYan-Hsuan Chuang phy_idx += 2;
63e3037485SYan-Hsuan Chuang } else {
64e3037485SYan-Hsuan Chuang /* 1-byte header format */
65e3037485SYan-Hsuan Chuang blk_idx = get_efuse_blk_idx_1_byte(hdr1);
66e3037485SYan-Hsuan Chuang word_en = hdr1 & 0xf;
67e3037485SYan-Hsuan Chuang phy_idx += 1;
68e3037485SYan-Hsuan Chuang }
69e3037485SYan-Hsuan Chuang
70e3037485SYan-Hsuan Chuang for (i = 0; i < 4; i++) {
71e3037485SYan-Hsuan Chuang if (invalid_efuse_content(word_en, i))
72e3037485SYan-Hsuan Chuang continue;
73e3037485SYan-Hsuan Chuang
74e3037485SYan-Hsuan Chuang log_idx = block_idx_to_logical_idx(blk_idx, i);
75e3037485SYan-Hsuan Chuang if (phy_idx + 1 > physical_size - protect_size ||
76e3037485SYan-Hsuan Chuang log_idx + 1 > logical_size)
77e3037485SYan-Hsuan Chuang return -EINVAL;
78e3037485SYan-Hsuan Chuang
79e3037485SYan-Hsuan Chuang log_map[log_idx] = phy_map[phy_idx];
80e3037485SYan-Hsuan Chuang log_map[log_idx + 1] = phy_map[phy_idx + 1];
81e3037485SYan-Hsuan Chuang phy_idx += 2;
82e3037485SYan-Hsuan Chuang }
83e3037485SYan-Hsuan Chuang }
84e3037485SYan-Hsuan Chuang return 0;
85e3037485SYan-Hsuan Chuang }
86e3037485SYan-Hsuan Chuang
rtw_dump_physical_efuse_map(struct rtw_dev * rtwdev,u8 * map)87e3037485SYan-Hsuan Chuang static int rtw_dump_physical_efuse_map(struct rtw_dev *rtwdev, u8 *map)
88e3037485SYan-Hsuan Chuang {
89*dcbf179cSPing-Ke Shih const struct rtw_chip_info *chip = rtwdev->chip;
90e3037485SYan-Hsuan Chuang u32 size = rtwdev->efuse.physical_size;
91e3037485SYan-Hsuan Chuang u32 efuse_ctl;
92e3037485SYan-Hsuan Chuang u32 addr;
93e3037485SYan-Hsuan Chuang u32 cnt;
94e3037485SYan-Hsuan Chuang
9544baa97cSPing-Ke Shih rtw_chip_efuse_grant_on(rtwdev);
9644baa97cSPing-Ke Shih
97e3037485SYan-Hsuan Chuang switch_efuse_bank(rtwdev);
98e3037485SYan-Hsuan Chuang
99e3037485SYan-Hsuan Chuang /* disable 2.5V LDO */
100e3037485SYan-Hsuan Chuang chip->ops->cfg_ldo25(rtwdev, false);
101e3037485SYan-Hsuan Chuang
102e3037485SYan-Hsuan Chuang efuse_ctl = rtw_read32(rtwdev, REG_EFUSE_CTRL);
103e3037485SYan-Hsuan Chuang
104e3037485SYan-Hsuan Chuang for (addr = 0; addr < size; addr++) {
105e3037485SYan-Hsuan Chuang efuse_ctl &= ~(BIT_MASK_EF_DATA | BITS_EF_ADDR);
106e3037485SYan-Hsuan Chuang efuse_ctl |= (addr & BIT_MASK_EF_ADDR) << BIT_SHIFT_EF_ADDR;
107e3037485SYan-Hsuan Chuang rtw_write32(rtwdev, REG_EFUSE_CTRL, efuse_ctl & (~BIT_EF_FLAG));
108e3037485SYan-Hsuan Chuang
109e3037485SYan-Hsuan Chuang cnt = 1000000;
110e3037485SYan-Hsuan Chuang do {
111e3037485SYan-Hsuan Chuang udelay(1);
112e3037485SYan-Hsuan Chuang efuse_ctl = rtw_read32(rtwdev, REG_EFUSE_CTRL);
113e3037485SYan-Hsuan Chuang if (--cnt == 0)
114e3037485SYan-Hsuan Chuang return -EBUSY;
115e3037485SYan-Hsuan Chuang } while (!(efuse_ctl & BIT_EF_FLAG));
116e3037485SYan-Hsuan Chuang
117e3037485SYan-Hsuan Chuang *(map + addr) = (u8)(efuse_ctl & BIT_MASK_EF_DATA);
118e3037485SYan-Hsuan Chuang }
119e3037485SYan-Hsuan Chuang
12044baa97cSPing-Ke Shih rtw_chip_efuse_grant_off(rtwdev);
12144baa97cSPing-Ke Shih
122e3037485SYan-Hsuan Chuang return 0;
123e3037485SYan-Hsuan Chuang }
124e3037485SYan-Hsuan Chuang
rtw_read8_physical_efuse(struct rtw_dev * rtwdev,u16 addr,u8 * data)1255ad4d895STzu-En Huang int rtw_read8_physical_efuse(struct rtw_dev *rtwdev, u16 addr, u8 *data)
1265ad4d895STzu-En Huang {
1275ad4d895STzu-En Huang u32 efuse_ctl;
1285ad4d895STzu-En Huang int ret;
1295ad4d895STzu-En Huang
1305ad4d895STzu-En Huang rtw_write32_mask(rtwdev, REG_EFUSE_CTRL, 0x3ff00, addr);
1315ad4d895STzu-En Huang rtw_write32_clr(rtwdev, REG_EFUSE_CTRL, BIT_EF_FLAG);
1325ad4d895STzu-En Huang
1335ad4d895STzu-En Huang ret = read_poll_timeout(rtw_read32, efuse_ctl, efuse_ctl & BIT_EF_FLAG,
1345ad4d895STzu-En Huang 1000, 100000, false, rtwdev, REG_EFUSE_CTRL);
1355ad4d895STzu-En Huang if (ret) {
1365ad4d895STzu-En Huang *data = EFUSE_READ_FAIL;
1375ad4d895STzu-En Huang return ret;
1385ad4d895STzu-En Huang }
1395ad4d895STzu-En Huang
1405ad4d895STzu-En Huang *data = rtw_read8(rtwdev, REG_EFUSE_CTRL);
1415ad4d895STzu-En Huang
1425ad4d895STzu-En Huang return 0;
1435ad4d895STzu-En Huang }
144449be866SZong-Zhe Yang EXPORT_SYMBOL(rtw_read8_physical_efuse);
1455ad4d895STzu-En Huang
rtw_parse_efuse_map(struct rtw_dev * rtwdev)146e3037485SYan-Hsuan Chuang int rtw_parse_efuse_map(struct rtw_dev *rtwdev)
147e3037485SYan-Hsuan Chuang {
148*dcbf179cSPing-Ke Shih const struct rtw_chip_info *chip = rtwdev->chip;
149e3037485SYan-Hsuan Chuang struct rtw_efuse *efuse = &rtwdev->efuse;
150e3037485SYan-Hsuan Chuang u32 phy_size = efuse->physical_size;
151e3037485SYan-Hsuan Chuang u32 log_size = efuse->logical_size;
152e3037485SYan-Hsuan Chuang u8 *phy_map = NULL;
153e3037485SYan-Hsuan Chuang u8 *log_map = NULL;
154e3037485SYan-Hsuan Chuang int ret = 0;
155e3037485SYan-Hsuan Chuang
156e3037485SYan-Hsuan Chuang phy_map = kmalloc(phy_size, GFP_KERNEL);
157e3037485SYan-Hsuan Chuang log_map = kmalloc(log_size, GFP_KERNEL);
158e3037485SYan-Hsuan Chuang if (!phy_map || !log_map) {
159e3037485SYan-Hsuan Chuang ret = -ENOMEM;
160e3037485SYan-Hsuan Chuang goto out_free;
161e3037485SYan-Hsuan Chuang }
162e3037485SYan-Hsuan Chuang
163e3037485SYan-Hsuan Chuang ret = rtw_dump_physical_efuse_map(rtwdev, phy_map);
164e3037485SYan-Hsuan Chuang if (ret) {
165e3037485SYan-Hsuan Chuang rtw_err(rtwdev, "failed to dump efuse physical map\n");
166e3037485SYan-Hsuan Chuang goto out_free;
167e3037485SYan-Hsuan Chuang }
168e3037485SYan-Hsuan Chuang
169e3037485SYan-Hsuan Chuang memset(log_map, 0xff, log_size);
170e3037485SYan-Hsuan Chuang ret = rtw_dump_logical_efuse_map(rtwdev, phy_map, log_map);
171e3037485SYan-Hsuan Chuang if (ret) {
172e3037485SYan-Hsuan Chuang rtw_err(rtwdev, "failed to dump efuse logical map\n");
173e3037485SYan-Hsuan Chuang goto out_free;
174e3037485SYan-Hsuan Chuang }
175e3037485SYan-Hsuan Chuang
176e3037485SYan-Hsuan Chuang ret = chip->ops->read_efuse(rtwdev, log_map);
177e3037485SYan-Hsuan Chuang if (ret) {
178e3037485SYan-Hsuan Chuang rtw_err(rtwdev, "failed to read efuse map\n");
179e3037485SYan-Hsuan Chuang goto out_free;
180e3037485SYan-Hsuan Chuang }
181e3037485SYan-Hsuan Chuang
182e3037485SYan-Hsuan Chuang out_free:
183e3037485SYan-Hsuan Chuang kfree(log_map);
184e3037485SYan-Hsuan Chuang kfree(phy_map);
185e3037485SYan-Hsuan Chuang
186e3037485SYan-Hsuan Chuang return ret;
187e3037485SYan-Hsuan Chuang }
188