1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
From e2333703373e8b81294da5d1c73c30154f75b082 Mon Sep 17 00:00:00 2001
From: Christian Lamparter <chunkeey@gmail.com>
Date: Fri, 15 Oct 2021 18:56:33 +0200
Subject: [PATCH] ath10k: fetch (pre-)calibration data via nvmem subsystem
On most embedded ath10k devices (like range extenders,
routers, accesspoints, ...) the calibration data is
stored in a easily accessible MTD partitions named
"ART", "caldata", "calibration", etc...
Since commit 4b361cfa8624 ("mtd: core: add OTP nvmem provider support"):
MTD partitions and portions of them can be specified
as potential nvmem-cells which are accessible through
the nvmem subsystem.
This feature - together with an nvmem cell definition either
in the platform data or via device-tree allows drivers to get
the (pre-)calibration data which is required for initializing
the WIFI.
Tested with Netgear EX6150v2 (IPQ4018)
Cc: Robert Marko <robimarko@gmail.com>
Cc: Thibaut Varene <hacks@slashdirt.org>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
---
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -12,6 +12,7 @@
#include <linux/dmi.h>
#include <linux/ctype.h>
#include <linux/pm_qos.h>
+#include <linux/nvmem-consumer.h>
#include <asm/byteorder.h>
#include "core.h"
@@ -935,7 +936,8 @@ static int ath10k_core_get_board_id_from
}
if (ar->cal_mode == ATH10K_PRE_CAL_MODE_DT ||
- ar->cal_mode == ATH10K_PRE_CAL_MODE_FILE)
+ ar->cal_mode == ATH10K_PRE_CAL_MODE_FILE ||
+ ar->cal_mode == ATH10K_PRE_CAL_MODE_NVMEM)
bmi_board_id_param = BMI_PARAM_GET_FLASH_BOARD_ID;
else
bmi_board_id_param = BMI_PARAM_GET_EEPROM_BOARD_ID;
@@ -1726,7 +1728,8 @@ static int ath10k_download_and_run_otp(s
/* As of now pre-cal is valid for 10_4 variants */
if (ar->cal_mode == ATH10K_PRE_CAL_MODE_DT ||
- ar->cal_mode == ATH10K_PRE_CAL_MODE_FILE)
+ ar->cal_mode == ATH10K_PRE_CAL_MODE_FILE ||
+ ar->cal_mode == ATH10K_PRE_CAL_MODE_NVMEM)
bmi_otp_exe_param = BMI_PARAM_FLASH_SECTION_ALL;
ret = ath10k_bmi_execute(ar, address, bmi_otp_exe_param, &result);
@@ -1853,6 +1856,39 @@ out_free:
return ret;
}
+static int ath10k_download_cal_nvmem(struct ath10k *ar, const char *cell_name)
+{
+ struct nvmem_cell *cell;
+ void *buf;
+ size_t len;
+ int ret;
+
+ cell = devm_nvmem_cell_get(ar->dev, cell_name);
+ if (IS_ERR(cell)) {
+ ret = PTR_ERR(cell);
+ return ret;
+ }
+
+ buf = nvmem_cell_read(cell, &len);
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
+
+ if (ar->hw_params.cal_data_len != len) {
+ kfree(buf);
+ ath10k_warn(ar, "invalid calibration data length in nvmem-cell '%s': %zu != %u\n",
+ cell_name, len, ar->hw_params.cal_data_len);
+ return -EMSGSIZE;
+ }
+
+ ret = ath10k_download_board_data(ar, buf, len);
+ kfree(buf);
+ if (ret)
+ ath10k_warn(ar, "failed to download calibration data from nvmem-cell '%s': %d\n",
+ cell_name, ret);
+
+ return ret;
+}
+
int ath10k_core_fetch_firmware_api_n(struct ath10k *ar, const char *name,
struct ath10k_fw_file *fw_file)
{
@@ -2087,6 +2123,18 @@ static int ath10k_core_pre_cal_download(
{
int ret;
+ ret = ath10k_download_cal_nvmem(ar, "pre-calibration");
+ if (ret == 0) {
+ ar->cal_mode = ATH10K_PRE_CAL_MODE_NVMEM;
+ goto success;
+ } else if (ret == -EPROBE_DEFER) {
+ return ret;
+ }
+
+ ath10k_dbg(ar, ATH10K_DBG_BOOT,
+ "boot did not find a pre-calibration nvmem-cell, try file next: %d\n",
+ ret);
+
ret = ath10k_download_cal_file(ar, ar->pre_cal_file);
if (ret == 0) {
ar->cal_mode = ATH10K_PRE_CAL_MODE_FILE;
@@ -2153,6 +2201,18 @@ static int ath10k_download_cal_data(stru
"pre cal download procedure failed, try cal file: %d\n",
ret);
+ ret = ath10k_download_cal_nvmem(ar, "calibration");
+ if (ret == 0) {
+ ar->cal_mode = ATH10K_CAL_MODE_NVMEM;
+ goto done;
+ } else if (ret == -EPROBE_DEFER) {
+ return ret;
+ }
+
+ ath10k_dbg(ar, ATH10K_DBG_BOOT,
+ "boot did not find a calibration nvmem-cell, try file next: %d\n",
+ ret);
+
ret = ath10k_download_cal_file(ar, ar->cal_file);
if (ret == 0) {
ar->cal_mode = ATH10K_CAL_MODE_FILE;
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -877,8 +877,10 @@ enum ath10k_cal_mode {
ATH10K_CAL_MODE_FILE,
ATH10K_CAL_MODE_OTP,
ATH10K_CAL_MODE_DT,
+ ATH10K_CAL_MODE_NVMEM,
ATH10K_PRE_CAL_MODE_FILE,
ATH10K_PRE_CAL_MODE_DT,
+ ATH10K_PRE_CAL_MODE_NVMEM,
ATH10K_CAL_MODE_EEPROM,
};
@@ -898,10 +900,14 @@ static inline const char *ath10k_cal_mod
return "otp";
case ATH10K_CAL_MODE_DT:
return "dt";
+ case ATH10K_CAL_MODE_NVMEM:
+ return "nvmem";
case ATH10K_PRE_CAL_MODE_FILE:
return "pre-cal-file";
case ATH10K_PRE_CAL_MODE_DT:
return "pre-cal-dt";
+ case ATH10K_PRE_CAL_MODE_NVMEM:
+ return "pre-cal-nvmem";
case ATH10K_CAL_MODE_EEPROM:
return "eeprom";
}
|
