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Merge branch 'bugfix/bootloader_freq_check_runtime' into 'master'

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bootloader: check previously used clock frequency at run time

See merge request idf/esp-idf!3827
This commit is contained in:
Angus Gratton 2019-02-27 13:22:47 +08:00
parent fab11e1cec 8cc6226051
commit 80f02cd0ea
3 changed files with 13 additions and 12 deletions
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8
components/bootloader_support/src/bootloader_clock.c
View file

@ -31,14 +31,14 @@ void bootloader_clock_configure()
/* Set CPU to 80MHz. Keep other clocks unmodified. */
int cpu_freq_mhz = 80;
/* On ESP32 rev 0, switching to 80MHz if clock was previously set to
/* On ESP32 rev 0, switching to 80/160 MHz if clock was previously set to
* 240 MHz may cause the chip to lock up (see section 3.5 of the errata
* document). For rev. 0, switch to 240 instead if it was chosen in
* menuconfig.
* document). For rev. 0, switch to 240 instead if it has been enabled
* previously.
*/
uint32_t chip_ver_reg = REG_READ(EFUSE_BLK0_RDATA3_REG);
if ((chip_ver_reg & EFUSE_RD_CHIP_VER_REV1_M) == 0 &&
CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ == 240) {
DPORT_REG_GET_FIELD(DPORT_CPU_PER_CONF_REG, DPORT_CPUPERIOD_SEL) == DPORT_CPUPERIOD_SEL_240) {
cpu_freq_mhz = 240;
}

3
components/soc/esp32/include/soc/dport_reg.h
View file

@ -179,6 +179,9 @@
#define DPORT_CPUPERIOD_SEL_M ((DPORT_CPUPERIOD_SEL_V)<<(DPORT_CPUPERIOD_SEL_S))
#define DPORT_CPUPERIOD_SEL_V 0x3
#define DPORT_CPUPERIOD_SEL_S 0
#define DPORT_CPUPERIOD_SEL_80 0
#define DPORT_CPUPERIOD_SEL_160 1
#define DPORT_CPUPERIOD_SEL_240 2
#define DPORT_PRO_CACHE_CTRL_REG (DR_REG_DPORT_BASE + 0x040)
/* DPORT_PRO_DRAM_HL : R/W ;bitpos:[16] ;default: 1'b0 ; */

14
components/soc/esp32/rtc_clk.c
View file

@ -398,7 +398,6 @@ void rtc_clk_cpu_freq_to_xtal(int freq, int div)
REG_WRITE(APB_CTRL_XTAL_TICK_CONF_REG, freq * MHZ / REF_CLK_FREQ - 1);
/* switch clock source */
REG_SET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_SOC_CLK_SEL, RTC_CNTL_SOC_CLK_SEL_XTL);
DPORT_REG_WRITE(DPORT_CPU_PER_CONF_REG, 0); /* clear DPORT_CPUPERIOD_SEL */
rtc_clk_apb_freq_update(freq * MHZ);
/* lower the voltage */
if (freq <= 2) {
@ -414,7 +413,6 @@ static void rtc_clk_cpu_freq_to_8m()
REG_SET_FIELD(RTC_CNTL_REG, RTC_CNTL_DIG_DBIAS_WAK, DIG_DBIAS_XTAL);
REG_SET_FIELD(APB_CTRL_SYSCLK_CONF_REG, APB_CTRL_PRE_DIV_CNT, 0);
REG_SET_FIELD(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_SOC_CLK_SEL, RTC_CNTL_SOC_CLK_SEL_8M);
DPORT_REG_WRITE(DPORT_CPU_PER_CONF_REG, 0); // clear DPORT_CPUPERIOD_SEL
rtc_clk_apb_freq_update(RTC_FAST_CLK_FREQ_8M);
}
@ -455,14 +453,14 @@ static void rtc_clk_bbpll_enable()
static void rtc_clk_cpu_freq_to_pll_mhz(int cpu_freq_mhz)
{
int dbias = DIG_DBIAS_80M_160M;
int per_conf = 0;
int per_conf = DPORT_CPUPERIOD_SEL_80;
if (cpu_freq_mhz == 80) {
/* nothing to do */
} else if (cpu_freq_mhz == 160) {
per_conf = 1;
per_conf = DPORT_CPUPERIOD_SEL_160;
} else if (cpu_freq_mhz == 240) {
dbias = DIG_DBIAS_240M;
per_conf = 2;
per_conf = DPORT_CPUPERIOD_SEL_240;
} else {
SOC_LOGE(TAG, "invalid frequency");
abort();
@ -690,15 +688,15 @@ void rtc_clk_cpu_freq_get_config(rtc_cpu_freq_config_t* out_config)
case RTC_CNTL_SOC_CLK_SEL_PLL: {
source = RTC_CPU_FREQ_SRC_PLL;
uint32_t cpuperiod_sel = DPORT_REG_GET_FIELD(DPORT_CPU_PER_CONF_REG, DPORT_CPUPERIOD_SEL);
if (cpuperiod_sel == 0) {
if (cpuperiod_sel == DPORT_CPUPERIOD_SEL_80) {
source_freq_mhz = RTC_PLL_FREQ_320M;
div = 4;
freq_mhz = 80;
} else if (cpuperiod_sel == 1) {
} else if (cpuperiod_sel == DPORT_CPUPERIOD_SEL_160) {
source_freq_mhz = RTC_PLL_FREQ_320M;
div = 2;
freq_mhz = 160;
} else if (cpuperiod_sel == 2) {
} else if (cpuperiod_sel == DPORT_CPUPERIOD_SEL_240) {
source_freq_mhz = RTC_PLL_FREQ_480M;
div = 2;
freq_mhz = 240;