mirror of https://github.com/joan2937/pigpio
New hardware revision decode
Decode hardware revision from either: 1) 'revision' string in /proc/cpuinfo (legacy) 2) binary number in /proc/device-tree/system/linux,revision The second path is recommended by raspberrypi.org for newer operating systems. See raspberrypi/linux#2110
This commit is contained in:
Guy McSwain
parent
5c1f52215d
commit
714136afe4
246
pigpio.c
246
pigpio.c
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@ -8159,7 +8159,8 @@ static void initReleaseResources(void)
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int initInitialise(void)
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{
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int rev, i, model;
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int i;
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unsigned rev, model;
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struct sockaddr_in server;
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struct sockaddr_in6 server6;
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char * portStr;
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@ -8207,13 +8208,27 @@ int initInitialise(void)
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7=Unknown
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8=Pi3B
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9=Zero
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12=Zero W
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13=Pi3B+
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14=Pi3A+
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17=Pi4B
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*/
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if (model < 2) gpioMask = PI_DEFAULT_UPDATE_MASK_A_B2;
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else if (model < 4) gpioMask = PI_DEFAULT_UPDATE_MASK_APLUS_BPLUS;
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else if (model == 4) gpioMask = PI_DEFAULT_UPDATE_MASK_PI2B;
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else if (model == 6) gpioMask = PI_DEFAULT_UPDATE_MASK_COMPUTE;
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else if (model == 8) gpioMask = PI_DEFAULT_UPDATE_MASK_PI3B;
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else if (model == 9) gpioMask = PI_DEFAULT_UPDATE_MASK_ZERO;
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else if (model == 6
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|| model ==10
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|| model ==16) gpioMask = PI_DEFAULT_UPDATE_MASK_COMPUTE;
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else if (model == 8
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|| model ==13
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|| model ==14) gpioMask = PI_DEFAULT_UPDATE_MASK_PI3B;
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else if (model == 9
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|| model ==12) gpioMask = PI_DEFAULT_UPDATE_MASK_ZERO;
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else if (model ==17) gpioMask = PI_DEFAULT_UPDATE_MASK_PI4B;
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else gpioMask = PI_DEFAULT_UPDATE_MASK_UNKNOWN;
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}
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@ -13431,13 +13446,14 @@ W warranty void if either bit is set
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S 0=old (bits 0-22 are revision number) 1=new (following fields apply)
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M 0=256 1=512 2=1024
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M 0=256 1=512 2=1024 3=2GB 4=4GB
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B 0=Sony 1=Egoman 2=Embest 3=Unknown 4=Embest
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B 0=Sony 1=Egoman 2=Embest 3=Sony Japan 4=Embest 5=Stadium
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P 0=2835, 1=2836, 2=2837
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P 0=2835, 1=2836, 2=2837 3=2711
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T 0=A 1=B 2=A+ 3=B+ 4=Pi2B 5=Alpha 6=Compute Module 7=Unknown 8=Pi3B 9=Zero
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T 0=A 1=B 2=A+ 3=B+ 4=Pi2B 5=Alpha 6=CM1 8=Pi3B 9=Zero a=CM3 c=Zero W
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d=3B+ e=3A+ 10=CM3+ 11=4B
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R PCB board revision
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@ -13455,157 +13471,119 @@ unsigned gpioHardwareRevision(void)
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if (rev) return rev;
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piCores = 0;
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filp = fopen ("/proc/cpuinfo", "r");
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if (filp != NULL)
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{
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while (fgets(buf, sizeof(buf), filp) != NULL)
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{
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if (piCores == 0)
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{
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if (!strncasecmp("model name", buf, 10))
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{
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if (strstr (buf, "ARMv6") != NULL)
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{
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piCores = 1;
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pi_peri_phys = 0x20000000;
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pi_dram_bus = 0x40000000;
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pi_mem_flag = 0x0C;
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}
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else if (strstr (buf, "ARMv7") != NULL)
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{
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piCores = 4;
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pi_peri_phys = 0x3F000000;
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pi_dram_bus = 0xC0000000;
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pi_mem_flag = 0x04;
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}
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else if (strstr (buf, "ARMv8") != NULL)
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{
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piCores = 4;
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pi_peri_phys = 0x3F000000;
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pi_dram_bus = 0xC0000000;
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pi_mem_flag = 0x04;
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}
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}
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}
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if (!strncasecmp("hardware\t: BCM", buf, 14))
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{
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int bcmno = atoi(buf+14);
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if ((bcmno == 2708) ||
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(bcmno == 2709) ||
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(bcmno == 2710) ||
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(bcmno == 2835) ||
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(bcmno == 2836) ||
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(bcmno == 2837))
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{
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pi_ispi = 1;
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}
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}
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if (!strncasecmp("revision\t:", buf, 10))
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{
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if (sscanf(buf+10, "%x%c", &rev, &term) == 2)
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{
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if (term != '\n') rev = 0;
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else rev &= 0xFFFFFF; /* mask out warranty bit */
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switch (rev&0xFFF0) /* just interested in BCM model */
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{
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case 0x3110: /* Pi4B */
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piCores = 4;
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pi_peri_phys = 0xFE000000;
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pi_dram_bus = 0xC0000000;
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pi_mem_flag = 0x04;
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pi_is_2711 = 1;
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pi_ispi = 1;
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clk_osc_freq = CLK_OSC_FREQ_2711;
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clk_plld_freq = CLK_PLLD_FREQ_2711;
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hw_pwm_max_freq = PI_HW_PWM_MAX_FREQ_2711;
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hw_clk_min_freq = PI_HW_CLK_MIN_FREQ_2711;
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hw_clk_max_freq = PI_HW_CLK_MAX_FREQ_2711;
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fclose(filp);
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if (!gpioMaskSet)
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{
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gpioMaskSet = 1;
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gpioMask = PI_DEFAULT_UPDATE_MASK_PI4B;
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}
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return rev;
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break;
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}
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}
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}
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}
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fclose(filp);
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}
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/*
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Raspberry pi 3 running arm64 don't put all the
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information we need in /proc/cpuinfo, but we can
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get it elsewhere.
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*/
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/* (some) arm64 operating systems get revision number here */
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if (!pi_ispi)
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if (rev == 0)
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{
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DBG(DBG_USER, "searching /proc/device-tree for revision");
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filp = fopen ("/proc/device-tree/system/linux,revision", "r");
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if (filp != NULL)
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{
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filp = fopen ("/proc/device-tree/model", "r");
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if (filp != NULL)
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uint32_t tmp;
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if (fread(&tmp,1 , 4, filp) == 4)
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{
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if (fgets(buf, sizeof(buf), filp) != NULL)
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{
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if (!strncmp("Raspberry Pi 3", buf, 14))
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{
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pi_ispi = 1;
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piCores = 4;
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pi_peri_phys = 0x3F000000;
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pi_dram_bus = 0xC0000000;
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pi_mem_flag = 0x04;
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}
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else if (!strncmp("Raspberry Pi 4 Model B", buf, 22))
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{
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pi_ispi = 1;
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piCores = 4;
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pi_peri_phys = 0xFE000000;
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pi_dram_bus = 0xC0000000;
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pi_mem_flag = 0x04;
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pi_is_2711 = 1;
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clk_osc_freq = CLK_OSC_FREQ_2711;
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clk_plld_freq = CLK_PLLD_FREQ_2711;
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hw_pwm_max_freq = PI_HW_PWM_MAX_FREQ_2711;
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hw_clk_min_freq = PI_HW_CLK_MIN_FREQ_2711;
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hw_clk_max_freq = PI_HW_CLK_MAX_FREQ_2711;
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if (!gpioMaskSet)
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{
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gpioMaskSet = 1;
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gpioMask = PI_DEFAULT_UPDATE_MASK_PI4B;
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}
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}
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}
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fclose(filp);
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/*
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for some reason the value returned by reading
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this /proc entry seems to be big endian,
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convert it.
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*/
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rev = ntohl(tmp);
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rev &= 0xFFFFFF; /* mask out warranty bit */
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}
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}
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fclose(filp);
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}
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if (rev == 0)
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piCores = 0;
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pi_ispi = 0;
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rev &= 0xFFFFFF; /* mask out warranty bit */
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/* Decode revision code */
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if ((rev & 0x800000) == 0) /* old rev code */
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{
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if (rev < 16) /* all BCM2835 */
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{
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filp = fopen ("/proc/device-tree/system/linux,revision", "r");
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if (filp != NULL)
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{
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uint32_t tmp;
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if (fread(&tmp,1 , 4, filp) == 4)
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{
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/*
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for some reason the value returned by reading
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this /proc entry seems to be big endian,
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convert it.
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*/
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rev = ntohl(tmp);
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rev &= 0xFFFFFF; /* mask out warranty bit */
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}
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}
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fclose(filp);
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pi_ispi = 1;
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piCores = 1;
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pi_peri_phys = 0x20000000;
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pi_dram_bus = 0x40000000;
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pi_mem_flag = 0x0C;
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}
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else
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{
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DBG(DBG_ALWAYS, "unknown revision=%x", rev);
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rev = 0;
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}
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}
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else /* new rev code */
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{
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switch ((rev >> 12) & 0xF) /* just interested in BCM model */
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{
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case 0x0: /* BCM2835 */
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pi_ispi = 1;
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piCores = 1;
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pi_peri_phys = 0x20000000;
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pi_dram_bus = 0x40000000;
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pi_mem_flag = 0x0C;
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break;
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case 0x1: /* BCM2836 */
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case 0x2: /* BCM2837 */
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pi_ispi = 1;
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piCores = 4;
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pi_peri_phys = 0x3F000000;
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pi_dram_bus = 0xC0000000;
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pi_mem_flag = 0x04;
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break;
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case 0x3: /* BCM2711 */
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pi_ispi = 1;
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piCores = 4;
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pi_peri_phys = 0xFE000000;
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pi_dram_bus = 0xC0000000;
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pi_mem_flag = 0x04;
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pi_is_2711 = 1;
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clk_osc_freq = CLK_OSC_FREQ_2711;
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clk_plld_freq = CLK_PLLD_FREQ_2711;
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hw_pwm_max_freq = PI_HW_PWM_MAX_FREQ_2711;
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hw_clk_min_freq = PI_HW_CLK_MIN_FREQ_2711;
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hw_clk_max_freq = PI_HW_CLK_MAX_FREQ_2711;
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break;
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default:
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DBG(DBG_ALWAYS, "unknown rev code (%x)", rev);
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rev=0;
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pi_ispi = 0;
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break;
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}
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}
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DBG(DBG_USER, "revision=%x", rev);
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DBG(DBG_USER, "pi_peri_phys=%x", pi_peri_phys);
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DBG(DBG_USER, "pi_dram_bus=%x", pi_dram_bus);
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DBG(DBG_USER, "pi_mem_flag=%x", pi_mem_flag);
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return rev;
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}
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