Martin Roth (martinroth@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/11743
-gerrit
commit cb6af20fab9ab254b673a41334b8677919fc1d21 Author: Martin Roth martinroth@google.com Date: Mon Sep 28 15:27:24 2015 -0600
Add EM100 'hyper term' spi console support in ramstage & smm
The EM100Pro allows the debug console to be sent over the SPI bus. This is not yet working in romstage due to the use of static variables in the SPI driver code. It is also not working on chipsets that have SPI write buffers of less than 10 characters due to the 9 byte command/header length specified by the EM100 protocol.
While this currently works only with the EM100, it seems like it would be useful on any logic analyzer with SPI debug - just filter on command bytes of 0x11.
Change-Id: Icd42ccd96cab0a10a4e70f4b02ecf9de8169564b Signed-off-by: Martin Roth martinroth@google.com --- src/Kconfig | 1 + src/console/Kconfig | 8 ++++ src/console/console.c | 3 ++ src/drivers/spi/Kconfig | 4 ++ src/drivers/spi/Makefile.inc | 5 +++ src/drivers/spi/spiconsole.c | 71 ++++++++++++++++++++++++++++++++ src/include/console/spi.h | 72 +++++++++++++++++++++++++++++++++ src/soc/intel/baytrail/Kconfig | 1 + src/soc/intel/braswell/Kconfig | 1 + src/soc/intel/broadwell/Kconfig | 1 + src/soc/intel/fsp_baytrail/Kconfig | 1 + src/southbridge/intel/lynxpoint/Kconfig | 1 + 12 files changed, 169 insertions(+)
diff --git a/src/Kconfig b/src/Kconfig index 2c75750..868ed08 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -777,6 +777,7 @@ config DEBUG_SMI bool "Output verbose SMI debug messages" default n depends on HAVE_SMI_HANDLER + select SPI_FLASH_SMM if SPI_CONSOLE help This option enables additional SMI related debug messages.
diff --git a/src/console/Kconfig b/src/console/Kconfig index 7d6fa0e..d9a5521 100644 --- a/src/console/Kconfig +++ b/src/console/Kconfig @@ -211,6 +211,14 @@ config CONSOLE_QEMU_DEBUGCON_PORT depends on CONSOLE_QEMU_DEBUGCON default 0x402
+config SPI_CONSOLE + bool "SPI debug console output" + depends on HAVE_SPI_CONSOLE_SUPPORT && !DEBUG_SPI_FLASH + help + Enable support for the debug console on the dediprog EM100Pro. + This is currently working only in ramstage due to how the spi + drivers are written. + choice prompt "Default console log level" default DEFAULT_CONSOLE_LOGLEVEL_8 diff --git a/src/console/console.c b/src/console/console.c index 00c0f1c..855de64 100644 --- a/src/console/console.c +++ b/src/console/console.c @@ -24,6 +24,7 @@ #include <console/streams.h> #include <console/uart.h> #include <console/usb.h> +#include <console/spi.h> #include <rules.h>
void console_hw_init(void) @@ -35,6 +36,7 @@ void console_hw_init(void) __uart_init(); __ne2k_init(); __usbdebug_init(); + __spiconsole_init(); }
void console_tx_byte(unsigned char byte) @@ -54,6 +56,7 @@ void console_tx_byte(unsigned char byte) __uart_tx_byte(byte); __ne2k_tx_byte(byte); __usb_tx_byte(byte); + __spiconsole_tx_byte(byte); }
void console_tx_flush(void) diff --git a/src/drivers/spi/Kconfig b/src/drivers/spi/Kconfig index 4052bb4..dedb88f 100644 --- a/src/drivers/spi/Kconfig +++ b/src/drivers/spi/Kconfig @@ -137,3 +137,7 @@ config SPI_FLASH_FAST_READ_DUAL_OUTPUT_3B to the chip on MOSI and data is received on both MOSI and MISO.
endif # SPI_FLASH + +config HAVE_SPI_CONSOLE_SUPPORT + def_bool n + diff --git a/src/drivers/spi/Makefile.inc b/src/drivers/spi/Makefile.inc index ade34a2..6697c70 100644 --- a/src/drivers/spi/Makefile.inc +++ b/src/drivers/spi/Makefile.inc @@ -1,5 +1,10 @@ # SPI flash driver interface
+ifeq ($(CONFIG_SPI_CONSOLE),y) +ramstage-y += spiconsole.c +smm-$(CONFIG_DEBUG_SMI) += spiconsole.c +endif + ifeq ($(CONFIG_COMMON_CBFS_SPI_WRAPPER),y) bootblock-y += spi_flash.c bootblock-$(CONFIG_SPI_FLASH_EON) += eon.c diff --git a/src/drivers/spi/spiconsole.c b/src/drivers/spi/spiconsole.c new file mode 100644 index 0000000..39a574c --- /dev/null +++ b/src/drivers/spi/spiconsole.c @@ -0,0 +1,71 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2015 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc. + */ + +#include <spi-generic.h> +#include <spi_flash.h> +#include <console/spi.h> + +void spiconsole_init(void) { + spi_init(); + return; +} + +/* + * The EM100 'hyper terminal' specification defines a header of 9 characters. + * Because of this, devices with a spi_crop_chunk of less than 10 characters + * can't be supported by this standard. + * + * To add support in romstage, the static struct here and the ones used by + * spi_xfer will need to be modified - removed, or mapped into cbmem. + * + * Because the Dediprog software expects strings, not single characters, and + * because of the header overhead, this builds up a buffer to send. + */ +void spiconsole_tx_byte(unsigned char c) { + static struct em100_msg msg = { + .header.spi_command = EM100_DEDICATED_CMD, + .header.em100_command = EM100_UFIFO_CMD, + .header.msg_signature = EM100_MSG_SIGNATURE, + .header.msg_type = EM100_MSG_ASCII, + .header.msg_length = 0 + }; + + /* Verify the spi buffer is big enough to send even a single byte */ + if (spi_crop_chunk(0,MAX_MSG_LENGTH) < + sizeof(struct em100_msg_header) + 1) + return; + + msg.data[msg.header.msg_length] = c; + msg.header.msg_length++; + + /* Send the data on newline or when the max spi length is reached */ + if (c == '\n' || (sizeof(struct em100_msg_header) + + msg.header.msg_length == spi_crop_chunk(0, + MAX_MSG_LENGTH))) { + struct spi_slave spi = {.rw = SPI_READ_FLAG}; + + spi_xfer(&spi, &msg, sizeof(struct em100_msg_header) + + msg.header.msg_length, NULL, 0); + + msg.header.msg_length = 0; + } + + return; +} + diff --git a/src/include/console/spi.h b/src/include/console/spi.h new file mode 100644 index 0000000..c47fec5 --- /dev/null +++ b/src/include/console/spi.h @@ -0,0 +1,72 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2015 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc. + */ + +#ifndef CONSOLE_SPI_H +#define CONSOLE_SPI_H 1 + +#include <rules.h> +#include <stdint.h> + +void spiconsole_init(void); +void spiconsole_tx_byte(unsigned char c); + +#define __CONSOLE_SPI_ENABLE__ CONFIG_SPI_CONSOLE && \ + (ENV_RAMSTAGE || (ENV_SMM && CONFIG_DEBUG_SMI)) + +#if __CONSOLE_SPI_ENABLE__ +static inline void __spiconsole_init(void) { spiconsole_init(); } +static inline void __spiconsole_tx_byte(u8 data) { spiconsole_tx_byte(data); } +#else +static inline void __spiconsole_init(void) {} +static inline void __spiconsole_tx_byte(u8 data) {} +#endif /* __CONSOLE_SPI_ENABLE__ */ + +#define MAX_MSG_LENGTH 128 + +#define EM100_DEDICATED_CMD 0x11 +#define EM100_UFIFO_CMD 0xC0 +#define EM100_MSG_SIGNATURE 0x47364440 + +enum em100_message_types { + EM100_MSG_CHECKPOINT_1B = 0x01, + EM100_MSG_CHECKPOINT_2B, + EM100_MSG_CHECKPOINT_4B, + EM100_MSG_HEX, + EM100_MSG_ASCII, + EM100_MSG_TIMESTAMP, + EM100_MSG_LOOKUP +}; + +struct em100_msg_header { + uint8_t spi_command; + uint8_t reserved; + uint8_t em100_command; + uint32_t msg_signature; + uint8_t msg_type; + uint8_t msg_length; +} __attribute__ ((packed)); + +struct em100_msg { + struct em100_msg_header header; + char data[MAX_MSG_LENGTH]; +} __attribute__ ((packed)); + + + +#endif /* CONSOLE_SPI_H */ diff --git a/src/soc/intel/baytrail/Kconfig b/src/soc/intel/baytrail/Kconfig index 921f568..8de32de 100644 --- a/src/soc/intel/baytrail/Kconfig +++ b/src/soc/intel/baytrail/Kconfig @@ -36,6 +36,7 @@ config CPU_SPECIFIC_OPTIONS select UDELAY_TSC select SOC_INTEL_COMMON select HAVE_INTEL_FIRMWARE + select HAVE_SPI_CONSOLE_SUPPORT
config BOOTBLOCK_CPU_INIT string diff --git a/src/soc/intel/braswell/Kconfig b/src/soc/intel/braswell/Kconfig index f76b9b2..5a41056 100644 --- a/src/soc/intel/braswell/Kconfig +++ b/src/soc/intel/braswell/Kconfig @@ -49,6 +49,7 @@ config CPU_SPECIFIC_OPTIONS select UDELAY_TSC select USE_GENERIC_FSP_CAR_INC select HAVE_INTEL_FIRMWARE + select HAVE_SPI_CONSOLE_SUPPORT
config BOOTBLOCK_CPU_INIT string diff --git a/src/soc/intel/broadwell/Kconfig b/src/soc/intel/broadwell/Kconfig index 6561fe2..33644e8 100644 --- a/src/soc/intel/broadwell/Kconfig +++ b/src/soc/intel/broadwell/Kconfig @@ -43,6 +43,7 @@ config CPU_SPECIFIC_OPTIONS select SOC_INTEL_COMMON select HAVE_INTEL_FIRMWARE select SOC_INTEL_COMMON_ACPI_WAKE_SOURCE + select HAVE_SPI_CONSOLE_SUPPORT
config BOOTBLOCK_CPU_INIT string diff --git a/src/soc/intel/fsp_baytrail/Kconfig b/src/soc/intel/fsp_baytrail/Kconfig index d51a238..cc09e1f 100644 --- a/src/soc/intel/fsp_baytrail/Kconfig +++ b/src/soc/intel/fsp_baytrail/Kconfig @@ -48,6 +48,7 @@ config CPU_SPECIFIC_OPTIONS select UDELAY_TSC select SUPPORT_CPU_UCODE_IN_CBFS select HAVE_INTEL_FIRMWARE + select HAVE_SPI_CONSOLE_SUPPORT
config SOC_INTEL_FSP_BAYTRAIL_MD bool diff --git a/src/southbridge/intel/lynxpoint/Kconfig b/src/southbridge/intel/lynxpoint/Kconfig index 3c8ae11..3221cff 100644 --- a/src/southbridge/intel/lynxpoint/Kconfig +++ b/src/southbridge/intel/lynxpoint/Kconfig @@ -33,6 +33,7 @@ config SOUTH_BRIDGE_OPTIONS # dummy select PCIEXP_COMMON_CLOCK select SPI_FLASH select HAVE_INTEL_FIRMWARE + select HAVE_SPI_CONSOLE_SUPPORT
config INTEL_LYNXPOINT_LP bool