1.共同修改的地方
(1)kernel\arch\arm\configs\msm8909-1gb-CB03_defconfig
使以下项有效
CONFIG_SERIAL_MSM_HSL=y
CONFIG_SERIAL_MSM_HSL_CONSOLE=y
增加以下项
CONFIG_DEBUG_LL=y
CONFIG_EARLY_PRINTK=y
(2)Root/bootable/bootloader/lk/project/msms8909.mk
确保DEFINES += WITH_DEBUG_UART=1
2.V1.0主板
图1
UART1_TX-------GPIO_4
UART1_RX-------GPIO_5
(3)device\qcom\sepolicy\common\file_contexts----需要make –j4才生效
使以下项有效
/dev/ttyHSL0u:object_r:console_device:s0
(4)kernel\arch\arm\boot\dts\qcom\msm8909-cb03.dtsi
使以下项不生效
spi0 = &spi_0; /* SPI0 controller device*/
使以下项有效
|
1
2
3
4
5
6
7
8
9
|
blsp1_uart1:serial@78af000
{
compatible=
"qcom,msm-lsuart-v14";
reg=
<0x78af000
0x200>;
interrupts=
<0
107
0>;
status=
"disabled";
clocks=
<&clock_gcc clk_gcc_blsp1_uart1_apps_clk>,
<&clock_gcc
clk_gcc_blsp1_ahb_clk>;
clock-names=
"core_clk",
"iface_clk";
};
|
(5)kernel\arch\arm\boot\dts\qcom\msm8909-qrd-cb03.dtsi
使以下项有效
|
1
2
3
4
5
|
&blsp1_uart1
{
status=
"ok";
pinctrl-names=
"default";
pinctrl-0=
<&uart_console_sleep>;
};
|
3.V1.1主板
图2
UART2_TX-------GPIO_20
UART2_RX-------GPIO_21
图3
UART_VDD_EN------I2C扩展IC XRA1201的P6引脚。
所做的修改如下
(1)\bootable\bootloader\lk\platform\msm8909\ msm8909-clock.c
msm_clocks_msm8909[]增加：
|
1
2
|
CLK_LOOKUP("uart2_iface_clk",gcc_blsp1_ahb_clk.c),
CLK_LOOKUP("uart2_core_clk",
gcc_blsp1_uart2_apps_clk.c),
|
(2)bootable\bootloader\lk\target\msm8909\init.c
target_early_init()函数下
|
1
2
3
|
uart_dm_init(1,
0,
BLSP1_UART0_BASE);
改为
uart_dm_init(2,0,
BLSP_UART1_BASE);
|
(3)\bootable\bootloader\lk\platform\msm8909\gpio.c
target_early_init()--->uart_dm_init(id)--->gpio_config_uart_dm()
|
1
2
3
4
5
6
7
8
|
/*
configure rx gpio */
gpio_tlmm_config(5,2,
GPIO_INPUT, GPIO_NO_PULL,
GPIO_8MA,GPIO_DISABLE);
/*configure
tx gpio */
gpio_tlmm_config(4,2,
GPIO_OUTPUT, GPIO_NO_PULL,
GPIO_8MA,GPIO_DISABLE);
#endif
|
改为
|
1
2
3
4
5
6
7
|
/*
configure rx gpio */
gpio_tlmm_config(21,
3,
GPIO_INPUT, GPIO_NO_PULL,
GPIO_8MA,GPIO_DISABLE);
/*configure
tx gpio */
gpio_tlmm_config(20,
3,
GPIO_OUTPUT, GPIO_NO_PULL,
GPIO_8MA,GPIO_DISABLE);
|
(4)\kernel\arch\arm\mach-msm\include\mach\msm_iomap-8909.h
#define MSM_DEBUG_UART_PHYS 0x78AF000改为0x78B0000
(5)device\qcom\sepolicy\common\file_contexts
增加：
/dev/ttyHSL1 u:object_r:console_device:s0
如果有/dev/ttyHSL0 u:object_r:console_device:s0也不影响。
(6)kernel\arch\arm\boot\dts\qcom\msm8909-cb03.dtsi
确保下面有效
|
1
2
3
4
5
6
7
8
9
|
blsp1_uart2:
serial@78b0000
{
compatible=
"qcom,msm-lsuart-v14";
reg=
<0x78b0000
0x200>;
interrupts=
<0
108
0>;
status=
"disabled";
clocks=
<&clock_gcc clk_gcc_blsp1_uart2_apps_clk>,
<&clock_gcc
clk_gcc_blsp1_ahb_clk>;
clock-names=
"core_clk",
"iface_clk";
};
|
同时注释掉blsp1_uart1，因为BLSP1是作为SPI。
(7)\kernel\drivers\misc\msmgpio_ctrl.c
msmgpio_ctrl_probe()增加
gpio_direction_output(pdata->uart1_vcc,1);//确保3.3V供电
这里就算是改为gpio_direction_output(pdata->uart1_vcc,0);也可输出调试信息，这里可能是其他地方有电过来。
(8)msm8909-qrd-skue-cb03.dtsi，比较重要
|
1
2
3
4
5
|
/
{
aliases{
serial1=
&blsp1_uart2;//
should be no serial1, 0 for console
};
};
|
这里确保为采用的串口，下面给出相关介绍
\kernel\Documentation\devicetree\bindings\tty\serial\msm_serial.txt
|
1
2
3
4
5
6
|
Aliases:
An
alias may optionally be used to bind theserial device to a tty device
(ttyHSLx)
with a given line number. Aliasesare of the form serial<n> where <n>
is
an integer representing the line numberto use. On systems with multiple
serial
devices present it is recommendedthat an alias be defined for
each such
device.</n></n>
|
(9)msm8909-pinctrl-cb03.dtsi和msm8909-pinctrl.dtsi
|
1
2
3
4
5
6
7
8
9
10
|
pmx-uartconsole
{
qcom,pins=
<&gp 4>,
<&gp 5>;
qcom,num-grp-pins=
<2>;
qcom,pin-func=
<2>;
label=
"uart-console";
uart_console_sleep:uart-console
{
drive-strength=
<2>;
bias-pull-down;
};
};
|
把这两个文件下的qcom,pins =<&gp 4>, <&gp 5>;改为qcom,pins = <&gp 20>, <&gp 21>;
(10) \device\qcom\msm8909\ BoardConfig.mk
BOARD_KERNEL_CMDLINE :=console=ttyHSL0,115200,n8 androidboot.console=ttyHSL0 androidboot.hardware=qcomuser_debug=31 msm_rtb.filter=0x3F ehci-hcd.park=3androidboot.bootdevice=7824900.sdhci lpm_levels.sleep_disabled=1 earlyprintk
上面的ttyHSL0统一改为ttyHSL1，同时去掉最后面的earlyprintk，否则启动失败信息如下：
|
1
2
3
4
5
|
Android
Bootloader - UART_DM Initialized!!!
[70]
Not able to search the panel:
[80]
Logo config doesn't match with fbconfig. Fall back default
logo
[520]
Channel alloc freed
Uncompressing
Linux... done, booting thekernel.
|
一开机可能就卡在这里，或是多次自动反复重启后停止这里，输出的都是这些信息。只要加上earlyprintk，就有这问题。
(11) kernel\arch\arm\boot\dts\qcom\msm8909-cb03.dtsi
4.V1.0主板和V1.1主板可显示调试信息的差异
V1.0主板可以输出更早启动阶段的调试信息，应该是由UART1改为UART2后，还有一些地方没有改好，如下：
|
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
|
Format:
Log Type - Time(microsec) - Message- Optional Info
Log
Type: B - Since Boot(Power OnReset), D - Delta, S - Statistic
S
-QC_IMAGE_VERSION_STRING=BOOT.BF.3.1.2.C2-00014
S
- IMAGE_VARIANT_STRING=DAASANAZA
S
- OEM_IMAGE_VERSION_STRING=BU3-gongyong5
S
- Boot Config, 0x000000e1
B
- 1566
- PBL, Start
B
- 4542
- bootable_media_detect_entry, Start
B
- 74039
- bootable_media_detect_success, Start
B
- 74043
- elf_loader_entry, Start
B
- 75610
- auth_hash_seg_entry, Start
B
- 75871
- auth_hash_seg_exit, Start
B
- 90062
- elf_segs_hash_verify_entry, Start
B
- 148922
- PBL, End
B
- 170342
- SBL1, Start
B
- 231739
- boot_flash_init, Start
D
- 30
- boot_flash_init, Delta
B
- 238662
- boot_config_data_table_init, Start
D
- 5642
- boot_config_data_table_init, Delta - (0
Bytes)
B
- 249276
- CDT version:3,Platform
ID:11,Major
ID:1,Minor
ID:0,Subtype:12
B
- 257054
- pm_device_init, Start
B
- 260378
- pm_device_init, TEST - MSM8909 detected
B
- 266051
- pm_device_init, INFO - PM8909 is selected
B
- 280783
- PM_SET_VAL:Skip
D
- 22112
- pm_device_init, Delta
B
- 282186
- sbl1_ddr_set_params, Start
B
- 284565
- cpr_init, Start
D
- 0
- cpr_init, Delta
B
- 290207
- Pre_DDR_clock_init, Start
D
- 183
- Pre_DDR_clock_init, Delta
D
- 0
- sbl1_ddr_set_params, Delta
B
- 303139
- pm_driver_init, Start
B
- 309941
- --> Charge init
B
- 3939
- battery voltage
B
- 313448
- boot up
B
- 10
- Current status
D
- 10614
- pm_driver_init, Delta
B
- 325557
- clock_init, Start
D
- 152
- clock_init, Delta
B
- 325923
- Image Load, Start
D
- 22814
- QSEE Image Loaded, Delta - (460120
Bytes)
B
- 348767
- Image Load, Start
D
- 549
- SEC Image Loaded, Delta - (2048
Bytes)
B
- 357063
- sbl1_efs_handle_cookies, Start
D
- 762
- sbl1_efs_handle_cookies, Delta
B
- 363773
- Image Load, Start
D
- 14731
- RPM Image Loaded, Delta - (154076
Bytes)
B
- 378535
- Image Load, Start
D
- 19551
- APPSBL Image Loaded, Delta - (466512
Bytes)
B
- 398147
- QSEE Execution, Start
D
- 335
- QSEE Execution, Delta
B
- 403881
- SBL1, End
D
- 235826
- SBL1, Delta
S
- Throughput, 33000
KB/s (1082756
Bytes, 32538
us)
S
- DDR Frequency, 400
MHz
|