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core: make the full 4096 bytes of EEPROM work on Teensy 3.6
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This commit updates QMK’s copy of the the teensy3 Arduino core code with the
necessary changes to make the Teensy 3.6 work.

Aside from different values for the partitioning, HSRUN mode must be left
temporarily while using the EEPROM.

fixes kinx-project/kint#8

related to kinx-project/kint#10
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@stapelberg
stapelberg committed Sep 24, 2021
1 parent c38a730 commit 9df3b9a
Showing 1 changed file with 199 additions and 14 deletions.
213 changes: 199 additions & 14 deletions tmk_core/common/chibios/eeprom_teensy.c
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Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,126 @@
* SOFTWARE.
*/

#if defined(K20x) /* chip selection */
#define SMC_PMSTAT_RUN ((uint8_t)0x01)
#define SMC_PMSTAT_HSRUN ((uint8_t)0x80)

#define F_CPU KINETIS_SYSCLK_FREQUENCY

static int kinetis_hsrun_disable(void) {
#if defined(MK66F18)
if (SMC->PMSTAT == SMC_PMSTAT_HSRUN) {
// First, reduce the CPU clock speed, but do not change
// the peripheral speed (F_BUS). Serial1 & Serial2 baud
// rates will be impacted, but most other peripherals
// will continue functioning at the same speed.
# if F_CPU == 256000000 && F_BUS == 64000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(1, 3, 1, 7); // TODO: TEST
# elif F_CPU == 256000000 && F_BUS == 128000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(1, 1, 1, 7); // TODO: TEST
# elif F_CPU == 240000000 && F_BUS == 60000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(1, 3, 1, 7); // ok
# elif F_CPU == 240000000 && F_BUS == 80000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(2, 2, 2, 8); // ok
# elif F_CPU == 240000000 && F_BUS == 120000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(1, 1, 1, 7); // ok
# elif F_CPU == 216000000 && F_BUS == 54000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(1, 3, 1, 7); // ok
# elif F_CPU == 216000000 && F_BUS == 72000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(2, 2, 2, 8); // ok
# elif F_CPU == 216000000 && F_BUS == 108000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(1, 1, 1, 7); // ok
# elif F_CPU == 192000000 && F_BUS == 48000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(1, 3, 1, 7); // ok
# elif F_CPU == 192000000 && F_BUS == 64000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(2, 2, 2, 8); // ok
# elif F_CPU == 192000000 && F_BUS == 96000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(1, 1, 1, 7); // ok
# elif F_CPU == 180000000 && F_BUS == 60000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(2, 2, 2, 8); // ok
# elif F_CPU == 180000000 && F_BUS == 90000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(1, 1, 1, 7); // ok
# elif F_CPU == 168000000 && F_BUS == 56000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(2, 2, 2, 5); // ok
# elif F_CPU == 144000000 && F_BUS == 48000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(2, 2, 2, 5); // ok
# elif F_CPU == 144000000 && F_BUS == 72000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(1, 1, 1, 5); // ok
# elif F_CPU == 120000000 && F_BUS == 60000000
SIM->CLKDIV1 = SIM_CLKDIV1_OUTDIV1(KINETIS_CLKDIV1_OUTDIV1 - 1) | SIM_CLKDIV1_OUTDIV2(KINETIS_CLKDIV1_OUTDIV2 - 1) |
# if defined(MK66F18)
SIM_CLKDIV1_OUTDIV3(KINETIS_CLKDIV1_OUTDIV3 - 1) |
# endif
SIM_CLKDIV1_OUTDIV4(KINETIS_CLKDIV1_OUTDIV4 - 1);
# else
return 0;
# endif
// Then turn off HSRUN mode
SMC->PMCTRL = SMC_PMCTRL_RUNM_SET(0);
while (SMC->PMSTAT == SMC_PMSTAT_HSRUN)
; // wait
return 1;
}
#endif
return 0;
}

static int kinetis_hsrun_enable(void) {
#if defined(MK66F18)
if (SMC->PMSTAT == SMC_PMSTAT_RUN) {
// Turn HSRUN mode on
SMC->PMCTRL = SMC_PMCTRL_RUNM_SET(3);
while (SMC->PMSTAT != SMC_PMSTAT_HSRUN) {
;
} // wait
// Then configure clock for full speed
# if F_CPU == 256000000 && F_BUS == 64000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 3, 0, 7);
# elif F_CPU == 256000000 && F_BUS == 128000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 1, 0, 7);
# elif F_CPU == 240000000 && F_BUS == 60000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 3, 0, 7);
# elif F_CPU == 240000000 && F_BUS == 80000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 2, 0, 7);
# elif F_CPU == 240000000 && F_BUS == 120000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 1, 0, 7);
# elif F_CPU == 216000000 && F_BUS == 54000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 3, 0, 7);
# elif F_CPU == 216000000 && F_BUS == 72000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 2, 0, 7);
# elif F_CPU == 216000000 && F_BUS == 108000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 1, 0, 7);
# elif F_CPU == 192000000 && F_BUS == 48000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 3, 0, 6);
# elif F_CPU == 192000000 && F_BUS == 64000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 2, 0, 6);
# elif F_CPU == 192000000 && F_BUS == 96000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 1, 0, 6);
# elif F_CPU == 180000000 && F_BUS == 60000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 2, 0, 6);
# elif F_CPU == 180000000 && F_BUS == 90000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 1, 0, 6);
# elif F_CPU == 168000000 && F_BUS == 56000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 2, 0, 5);
# elif F_CPU == 144000000 && F_BUS == 48000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 2, 0, 4);
# elif F_CPU == 144000000 && F_BUS == 72000000
SIM_CLKDIV1 = SIM_CLKDIV1_OUTDIVS(0, 1, 0, 4);
# elif F_CPU == 120000000 && F_BUS == 60000000
SIM->CLKDIV1 = SIM_CLKDIV1_OUTDIV1(KINETIS_CLKDIV1_OUTDIV1 - 1) | SIM_CLKDIV1_OUTDIV2(KINETIS_CLKDIV1_OUTDIV2 - 1) |
# if defined(MK66F18)
SIM_CLKDIV1_OUTDIV3(KINETIS_CLKDIV1_OUTDIV3 - 1) |
# endif
SIM_CLKDIV1_OUTDIV4(KINETIS_CLKDIV1_OUTDIV4 - 1);
# else
return 0;
# endif
return 1;
}
#endif
return 0;
}

#if defined(K20x) || defined(MK66F18) /* chip selection */
/* Teensy 3.0, 3.1, 3.2; mchck; infinity keyboard */

// The EEPROM is really RAM with a hardware-based backup system to
Expand Down Expand Up @@ -69,22 +188,34 @@
//
# define HANDLE_UNALIGNED_WRITES

# if defined(K20x)
# define EEPROM_MAX 2048
# define EEPARTITION 0x03 // all 32K dataflash for EEPROM, none for Data
# define EEESPLIT 0x30 // must be 0x30 on these chips
# elif defined(MK66F18)
# define EEPROM_MAX 4096
# define EEPARTITION 0x05 // 128K dataflash for EEPROM, 128K for Data
# define EEESPLIT 0x10 // best endurance: 0x00 = first 12%, 0x10 = first 25%, 0x30 = all equal
# endif

// Minimum EEPROM Endurance
// ------------------------
# if (EEPROM_SIZE == 2048) // 35000 writes/byte or 70000 writes/word
# define EEESIZE 0x33
# if (EEPROM_SIZE == 4096)
# define EEESIZE 0x02
# elif (EEPROM_SIZE == 2048) // 35000 writes/byte or 70000 writes/word
# define EEESIZE 0x03
# elif (EEPROM_SIZE == 1024) // 75000 writes/byte or 150000 writes/word
# define EEESIZE 0x34
# define EEESIZE 0x04
# elif (EEPROM_SIZE == 512) // 155000 writes/byte or 310000 writes/word
# define EEESIZE 0x35
# define EEESIZE 0x05
# elif (EEPROM_SIZE == 256) // 315000 writes/byte or 630000 writes/word
# define EEESIZE 0x36
# define EEESIZE 0x06
# elif (EEPROM_SIZE == 128) // 635000 writes/byte or 1270000 writes/word
# define EEESIZE 0x37
# define EEESIZE 0x07
# elif (EEPROM_SIZE == 64) // 1275000 writes/byte or 2550000 writes/word
# define EEESIZE 0x38
# define EEESIZE 0x08
# elif (EEPROM_SIZE == 32) // 2555000 writes/byte or 5110000 writes/word
# define EEESIZE 0x39
# define EEESIZE 0x09
# endif

/** \brief eeprom initialization
Expand All @@ -97,15 +228,21 @@ void eeprom_initialize(void) {
uint8_t status;

if (FTFL->FCNFG & FTFL_FCNFG_RAMRDY) {
uint8_t stat = FTFL->FSTAT & 0x70;
if (stat) FTFL->FSTAT = stat;

// FlexRAM is configured as traditional RAM
// We need to reconfigure for EEPROM usage
FTFL->FCCOB0 = 0x80; // PGMPART = Program Partition Command
FTFL->FCCOB4 = EEESIZE; // EEPROM Size
FTFL->FCCOB5 = 0x03; // 0K for Dataflash, 32K for EEPROM backup
kinetis_hsrun_disable();
FTFL->FCCOB0 = FTFE_FCCOB0_CCOBn_SET(0x80); // PGMPART = Program Partition Command
FTFL->FCCOB3 = 0;
FTFL->FCCOB4 = EEESPLIT | EEESIZE;
FTFL->FCCOB5 = EEPARTITION;
__disable_irq();
// do_flash_cmd() must execute from RAM. Luckily the C syntax is simple...
(*((void (*)(volatile uint8_t *))((uint32_t)do_flash_cmd | 1)))(&(FTFL->FSTAT));
__enable_irq();
kinetis_hsrun_enable();
status = FTFL->FSTAT;
if (status & (FTFL_FSTAT_RDCOLERR | FTFL_FSTAT_ACCERR | FTFL_FSTAT_FPVIOL)) {
FTFL->FSTAT = (status & (FTFL_FSTAT_RDCOLERR | FTFL_FSTAT_ACCERR | FTFL_FSTAT_FPVIOL));
Expand All @@ -114,11 +251,11 @@ void eeprom_initialize(void) {
}
// wait for eeprom to become ready (is this really necessary?)
while (!(FTFL->FCNFG & FTFL_FCNFG_EEERDY)) {
if (++count > 20000) break;
if (++count > 200000) break;
}
}

# define FlexRAM ((uint8_t *)0x14000000)
# define FlexRAM ((volatile uint8_t *)0x14000000)

/** \brief eeprom read byte
*
Expand Down Expand Up @@ -195,8 +332,12 @@ void eeprom_write_byte(uint8_t *addr, uint8_t value) {
if (offset >= EEPROM_SIZE) return;
if (!(FTFL->FCNFG & FTFL_FCNFG_EEERDY)) eeprom_initialize();
if (FlexRAM[offset] != value) {
kinetis_hsrun_disable();
uint8_t stat = FTFL->FSTAT & 0x70;
if (stat) FTFL->FSTAT = stat;
FlexRAM[offset] = value;
flexram_wait();
kinetis_hsrun_enable();
}
}

Expand All @@ -213,18 +354,30 @@ void eeprom_write_word(uint16_t *addr, uint16_t value) {
if ((offset & 1) == 0) {
# endif
if (*(uint16_t *)(&FlexRAM[offset]) != value) {
kinetis_hsrun_disable();
uint8_t stat = FTFL->FSTAT & 0x70;
if (stat) FTFL->FSTAT = stat;
*(uint16_t *)(&FlexRAM[offset]) = value;
flexram_wait();
kinetis_hsrun_enable();
}
# ifdef HANDLE_UNALIGNED_WRITES
} else {
if (FlexRAM[offset] != value) {
kinetis_hsrun_disable();
uint8_t stat = FTFL->FSTAT & 0x70;
if (stat) FTFL->FSTAT = stat;
FlexRAM[offset] = value;
flexram_wait();
kinetis_hsrun_enable();
}
if (FlexRAM[offset + 1] != (value >> 8)) {
kinetis_hsrun_disable();
uint8_t stat = FTFL->FSTAT & 0x70;
if (stat) FTFL->FSTAT = stat;
FlexRAM[offset + 1] = value >> 8;
flexram_wait();
kinetis_hsrun_enable();
}
}
# endif
Expand All @@ -244,33 +397,57 @@ void eeprom_write_dword(uint32_t *addr, uint32_t value) {
case 0:
# endif
if (*(uint32_t *)(&FlexRAM[offset]) != value) {
kinetis_hsrun_disable();
uint8_t stat = FTFL->FSTAT & 0x70;
if (stat) FTFL->FSTAT = stat;
*(uint32_t *)(&FlexRAM[offset]) = value;
flexram_wait();
kinetis_hsrun_enable();
}
return;
# ifdef HANDLE_UNALIGNED_WRITES
case 2:
if (*(uint16_t *)(&FlexRAM[offset]) != value) {
kinetis_hsrun_disable();
uint8_t stat = FTFL->FSTAT & 0x70;
if (stat) FTFL->FSTAT = stat;
*(uint16_t *)(&FlexRAM[offset]) = value;
flexram_wait();
kinetis_hsrun_enable();
}
if (*(uint16_t *)(&FlexRAM[offset + 2]) != (value >> 16)) {
kinetis_hsrun_disable();
uint8_t stat = FTFL->FSTAT & 0x70;
if (stat) FTFL->FSTAT = stat;
*(uint16_t *)(&FlexRAM[offset + 2]) = value >> 16;
flexram_wait();
kinetis_hsrun_enable();
}
return;
default:
if (FlexRAM[offset] != value) {
kinetis_hsrun_disable();
uint8_t stat = FTFL->FSTAT & 0x70;
if (stat) FTFL->FSTAT = stat;
FlexRAM[offset] = value;
flexram_wait();
kinetis_hsrun_enable();
}
if (*(uint16_t *)(&FlexRAM[offset + 1]) != (value >> 8)) {
kinetis_hsrun_disable();
uint8_t stat = FTFL->FSTAT & 0x70;
if (stat) FTFL->FSTAT = stat;
*(uint16_t *)(&FlexRAM[offset + 1]) = value >> 8;
flexram_wait();
kinetis_hsrun_enable();
}
if (FlexRAM[offset + 3] != (value >> 24)) {
kinetis_hsrun_disable();
uint8_t stat = FTFL->FSTAT & 0x70;
if (stat) FTFL->FSTAT = stat;
FlexRAM[offset + 3] = value >> 24;
flexram_wait();
kinetis_hsrun_enable();
}
}
# endif
Expand All @@ -288,6 +465,7 @@ void eeprom_write_block(const void *buf, void *addr, uint32_t len) {
if (!(FTFL->FCNFG & FTFL_FCNFG_EEERDY)) eeprom_initialize();
if (len >= EEPROM_SIZE) len = EEPROM_SIZE;
if (offset + len >= EEPROM_SIZE) len = EEPROM_SIZE - offset;
kinetis_hsrun_disable();
while (len > 0) {
uint32_t lsb = offset & 3;
if (lsb == 0 && len >= 4) {
Expand All @@ -298,6 +476,8 @@ void eeprom_write_block(const void *buf, void *addr, uint32_t len) {
val32 |= (*src++ << 16);
val32 |= (*src++ << 24);
if (*(uint32_t *)(&FlexRAM[offset]) != val32) {
uint8_t stat = FTFL->FSTAT & 0x70;
if (stat) FTFL->FSTAT = stat;
*(uint32_t *)(&FlexRAM[offset]) = val32;
flexram_wait();
}
Expand All @@ -309,6 +489,8 @@ void eeprom_write_block(const void *buf, void *addr, uint32_t len) {
val16 = *src++;
val16 |= (*src++ << 8);
if (*(uint16_t *)(&FlexRAM[offset]) != val16) {
uint8_t stat = FTFL->FSTAT & 0x70;
if (stat) FTFL->FSTAT = stat;
*(uint16_t *)(&FlexRAM[offset]) = val16;
flexram_wait();
}
Expand All @@ -318,13 +500,16 @@ void eeprom_write_block(const void *buf, void *addr, uint32_t len) {
// write 8 bits
uint8_t val8 = *src++;
if (FlexRAM[offset] != val8) {
uint8_t stat = FTFL->FSTAT & 0x70;
if (stat) FTFL->FSTAT = stat;
FlexRAM[offset] = val8;
flexram_wait();
}
offset++;
len--;
}
}
kinetis_hsrun_enable();
}

/*
Expand Down

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