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Cleanup use of scratch rom for SPI flashing, prepare to implement no-reset flashing process

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This commit is contained in:
Jeremy Soller
2020-02-27 13:21:04 -07:00
parent 14bb3af80b
commit a24f9ed3ae
6 changed files with 182 additions and 152 deletions
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1
src/board/system76/lemp9/scratch.c
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@@ -8,6 +8,7 @@ uint8_t __code __at(SCRATCH_OFFSET) scratch_rom[] = {
#include <scratch.h>
};
// SCAR0 is stored in processor cache, not in xram
volatile uint8_t __xdata __at(0x1040) SCAR0L;
volatile uint8_t __xdata __at(0x1041) SCAR0M;
volatile uint8_t __xdata __at(0x1042) SCAR0H;

101
src/board/system76/lemp9/smfi.c
View File

@@ -22,7 +22,10 @@ volatile uint8_t __xdata __at(0x105C) HRAMW1BA;
volatile uint8_t __xdata __at(0x105D) HRAMW0AAS;
// Host RAM window 1 access allow size
volatile uint8_t __xdata __at(0x105E) HRAMW1AAS;
// Flash control register 3
volatile uint8_t __xdata __at(0x1063) FLHCTRL3;
// EC indirect flash access
volatile uint8_t __xdata __at(0x103B) ECINDAR0;
volatile uint8_t __xdata __at(0x103C) ECINDAR1;
volatile uint8_t __xdata __at(0x103D) ECINDAR2;
@@ -35,51 +38,8 @@ volatile uint8_t __xdata __at(0x1F07) EWDKEYR;
static volatile uint8_t __xdata __at(0xE00) smfi_cmd[256];
static volatile uint8_t __xdata __at(0xF00) smfi_dbg[256];
void smfi_init(void) {
int i;
// Clear command region
for (i = 1; i < ARRAY_SIZE(smfi_cmd); i++) {
smfi_cmd[i] = 0x00;
}
// Clear host command last
smfi_cmd[0] = 0x00;
// Clear debug region
for (i = 1; i < ARRAY_SIZE(smfi_dbg); i++) {
smfi_dbg[i] = 0x00;
}
// Clear tail last
smfi_dbg[0] = 0x00;
// H2RAM window 0 address 0xE00 - 0xEFF, read/write
HRAMW0BA = 0xE0;
HRAMW0AAS = 0x04;
// H2RAM window 1 address 0xF00 - 0xFFF, read/write
HRAMW1BA = 0xF0;
HRAMW1AAS = 0x04;
// Enable H2RAM window 0 and 1 using LPC I/O
HRAMWC |= 0x13;
}
static enum Result cmd_debug(void) {
int i;
for (i = 2; i < ARRAY_SIZE(smfi_cmd); i++) {
uint8_t b = smfi_cmd[i];
if (b == 0) break;
putchar(b);
}
return RES_OK;
}
static enum Result cmd_spi(void) {
static enum Result cmd_spi_scratch(void) __critical {
uint8_t flags = smfi_cmd[2];
#ifdef __SCRATCH__
uint8_t len = smfi_cmd[3];
// Enable chip
@@ -112,12 +72,61 @@ static enum Result cmd_spi(void) {
}
return RES_OK;
}
void smfi_init(void) {
int i;
// Clear command region
for (i = 1; i < ARRAY_SIZE(smfi_cmd); i++) {
smfi_cmd[i] = 0x00;
}
// Clear host command last
smfi_cmd[0] = 0x00;
// Clear debug region
for (i = 1; i < ARRAY_SIZE(smfi_dbg); i++) {
smfi_dbg[i] = 0x00;
}
// Clear tail last
smfi_dbg[0] = 0x00;
// H2RAM window 0 address 0xE00 - 0xEFF, read/write
HRAMW0BA = 0xE0;
HRAMW0AAS = 0x04;
// H2RAM window 1 address 0xF00 - 0xFFF, read/write
HRAMW1BA = 0xF0;
HRAMW1AAS = 0x04;
// Enable H2RAM window 0 and 1 using LPC I/O
HRAMWC |= 0x13;
// Enable backup ROM access
FLHCTRL3 |= (1 << 3);
}
static enum Result cmd_debug(void) {
int i;
for (i = 2; i < ARRAY_SIZE(smfi_cmd); i++) {
uint8_t b = smfi_cmd[i];
if (b == 0) break;
putchar(b);
}
return RES_OK;
}
static enum Result cmd_spi(void) {
#ifdef __SCRATCH__
return cmd_spi_scratch();
#else
if (flags & CMD_SPI_FLAG_SCRATCH) {
if (smfi_cmd[2] & CMD_SPI_FLAG_SCRATCH) {
scratch_trampoline();
}
// Cannot use SPI bus while running EC from SPI, or trampoline failed
// Cannot use follow mode unless running from scratch rom
return RES_ERR;
#endif
}