From a3f7fe8219654aa90ab2ea9458267e5136a03a01 Mon Sep 17 00:00:00 2001 From: mtk05962 Date: Fri, 16 Oct 2015 13:42:49 +0800 Subject: mt8173: add SPI NOR support BRANCH=none BUG=none TEST=boot oak to kernel on rev1 Change-Id: I0773c81398df445aec16bcfcd0c5a8fe5a588b5c Signed-off-by: Patrick Georgi Original-Commit-Id: ae15c42c2f7d9c2a716e5b6098d85e17279f5eae Original-Change-Id: I65abf810d35ae5e7156cf6f5730117e690183d18 Original-Signed-off-by: mtk05962 Original-Reviewed-on: https://chromium-review.googlesource.com/292693 Original-Commit-Ready: Yidi Lin Original-Tested-by: Yidi Lin Original-Reviewed-by: Julius Werner Reviewed-on: https://review.coreboot.org/13102 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth --- src/soc/mediatek/mt8173/Makefile.inc | 8 +- src/soc/mediatek/mt8173/cbfs.c | 21 --- src/soc/mediatek/mt8173/flash_controller.c | 184 +++++++++++++++++++++ .../mediatek/mt8173/include/soc/flash_controller.h | 80 +++++++++ src/soc/mediatek/mt8173/spi.c | 8 + 5 files changed, 276 insertions(+), 25 deletions(-) delete mode 100644 src/soc/mediatek/mt8173/cbfs.c create mode 100644 src/soc/mediatek/mt8173/flash_controller.c create mode 100644 src/soc/mediatek/mt8173/include/soc/flash_controller.h (limited to 'src/soc/mediatek/mt8173') diff --git a/src/soc/mediatek/mt8173/Makefile.inc b/src/soc/mediatek/mt8173/Makefile.inc index cbc98555fe..97053a5b96 100644 --- a/src/soc/mediatek/mt8173/Makefile.inc +++ b/src/soc/mediatek/mt8173/Makefile.inc @@ -16,7 +16,7 @@ ifeq ($(CONFIG_SOC_MEDIATEK_MT8173),y) bootblock-y += bootblock.c -bootblock-y += cbfs.c +bootblock-$(CONFIG_SPI_FLASH) += flash_controller.c bootblock-y += pll.c bootblock-y += spi.c bootblock-y += timer.c @@ -38,11 +38,11 @@ verstage-$(CONFIG_DRIVERS_UART) += uart.c verstage-y += timer.c verstage-y += wdt.c -verstage-y += cbfs.c +verstage-$(CONFIG_SPI_FLASH) += flash_controller.c ################################################################################ -romstage-y += cbfs.c +romstage-$(CONFIG_SPI_FLASH) += flash_controller.c romstage-y += timer.c romstage-$(CONFIG_DRIVERS_UART) += uart.c @@ -57,7 +57,7 @@ romstage-y += rtc.c ramstage-y += cbmem.c ramstage-y += spi.c -ramstage-y += cbfs.c +ramstage-$(CONFIG_SPI_FLASH) += flash_controller.c ramstage-y += soc.c mtcmos.c ramstage-y += timer.c ramstage-$(CONFIG_DRIVERS_UART) += uart.c diff --git a/src/soc/mediatek/mt8173/cbfs.c b/src/soc/mediatek/mt8173/cbfs.c deleted file mode 100644 index 25348fce66..0000000000 --- a/src/soc/mediatek/mt8173/cbfs.c +++ /dev/null @@ -1,21 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright 2015 MediaTek 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. - */ - -#include - -const struct region_device *boot_device_ro(void) -{ - return NULL; -} diff --git a/src/soc/mediatek/mt8173/flash_controller.c b/src/soc/mediatek/mt8173/flash_controller.c new file mode 100644 index 0000000000..3cd81a226a --- /dev/null +++ b/src/soc/mediatek/mt8173/flash_controller.c @@ -0,0 +1,184 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2015 MediaTek 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. + */ + +/* NOR Flash is clocked with 26MHz, from CLK26M -> TOP_SPINFI_IFR */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define get_nth_byte(d, n) ((d >> (8 * n)) & 0xff) + +static int polling_cmd(u32 val) +{ + struct stopwatch sw; + + stopwatch_init_usecs_expire(&sw, SFLASH_POLLINGREG_US); + + while ((read32(&mt8173_nor->cmd) & val) != 0) { + if (stopwatch_expired(&sw)) + return -1; + } + + return 0; +} + +static int mt8173_nor_execute_cmd(u8 cmdval) +{ + u8 val = cmdval & ~(SFLASH_AUTOINC); + + write8(&mt8173_nor->cmd, cmdval); + return polling_cmd(val); +} + +static int sflashhw_read_flash_status(u8 *value) +{ + if (mt8173_nor_execute_cmd(SFLASH_READSTATUS)) + return -1; + + *value = read8(&mt8173_nor->rdsr); + return 0; +} + +static int wait_for_write_done(void) +{ + struct stopwatch sw; + u8 reg; + + stopwatch_init_usecs_expire(&sw, SFLASH_POLLINGREG_US); + + while (sflashhw_read_flash_status(®) == 0) { + if (!(reg & SFLASH_WRITE_IN_PROGRESS)) + return 0; + if (stopwatch_expired(&sw)) + return -1; + } + + return -1; +} + +/* set serial flash program address */ +static void set_sfpaddr(u32 addr) +{ + write8(&mt8173_nor->radr[2], get_nth_byte(addr, 2)); + write8(&mt8173_nor->radr[1], get_nth_byte(addr, 1)); + write8(&mt8173_nor->radr[0], get_nth_byte(addr, 0)); +} + +static int sector_erase(int offset) +{ + if (wait_for_write_done()) + return -1; + + write8(&mt8173_nor->prgdata[5], SFLASH_OP_WREN); + write8(&mt8173_nor->cnt, 8); + mt8173_nor_execute_cmd(SFLASH_PRG_CMD); + + write8(&mt8173_nor->prgdata[5], SECTOR_ERASE_CMD); + write8(&mt8173_nor->prgdata[4], get_nth_byte(offset, 2)); + write8(&mt8173_nor->prgdata[3], get_nth_byte(offset, 1)); + write8(&mt8173_nor->prgdata[2], get_nth_byte(offset, 0)); + write8(&mt8173_nor->cnt, 32); + mt8173_nor_execute_cmd(SFLASH_PRG_CMD); + + if (wait_for_write_done()) + return -1; + + return 0; +} + +unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len) +{ + return min(65535, buf_len); +} + +static int nor_read(struct spi_flash *flash, u32 addr, size_t len, void *buf) +{ + u8 *buffer = (u8 *)buf; + + set_sfpaddr(addr); + while (len) { + if (mt8173_nor_execute_cmd(SFLASH_RD_TRIGGER | SFLASH_AUTOINC)) + return -1; + + *buffer++ = read8(&mt8173_nor->rdata); + len--; + } + return 0; +} + +static int nor_write(struct spi_flash *flash, u32 addr, size_t len, + const void *buf) +{ + const u8 *buffer = (const u8 *)buf; + + set_sfpaddr(addr); + while (len) { + write8(&mt8173_nor->wdata, *buffer); + if (mt8173_nor_execute_cmd(SFLASH_WR_TRIGGER | SFLASH_AUTOINC)) + return -1; + + if (wait_for_write_done()) + return -1; + buffer++; + len--; + } + return 0; +} + +static int nor_erase(struct spi_flash *flash, u32 offset, size_t len) +{ + int sector_start = offset; + int sector_num = (u32)len / flash->sector_size; + + while (sector_num) { + if (!sector_erase(sector_start)) { + sector_start += flash->sector_size; + sector_num--; + } else { + printk(BIOS_WARNING, "Erase failed at 0x%x!\n", + sector_start); + return -1; + } + } + return 0; +} + +struct spi_flash *mt8173_nor_flash_probe(struct spi_slave *spi) +{ + static struct spi_flash flash = {0}; + + if (flash.spi) + return &flash; + + write32(&mt8173_nor->wrprot, SFLASH_COMMAND_ENABLE); + flash.spi = spi; + flash.name = "mt8173 flash controller"; + flash.write = nor_write; + flash.erase = nor_erase; + flash.read = nor_read; + flash.status = 0; + flash.sector_size = 0x1000; + flash.erase_cmd = SECTOR_ERASE_CMD; + flash.size = CONFIG_ROM_SIZE; + return &flash; +} diff --git a/src/soc/mediatek/mt8173/include/soc/flash_controller.h b/src/soc/mediatek/mt8173/include/soc/flash_controller.h new file mode 100644 index 0000000000..2527d6be6a --- /dev/null +++ b/src/soc/mediatek/mt8173/include/soc/flash_controller.h @@ -0,0 +1,80 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2015 MediaTek 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. + */ + +#ifndef __SOC_MEDIATEK_MT8173_FLASH_CONTROLLER_H__ +#define __SOC_MEDIATEK_MT8173_FLASH_CONTROLLER_H__ + +#include +#include +#include +#include + +enum { + SFLASH_POLLINGREG_US = 500000, + SFLASH_WRBUF_SIZE = 128, + SFLASHNAME_LENGTH = 16, + SFLASH_WRITE_IN_PROGRESS = 1, + SFLASH_COMMAND_ENABLE = 0x30, + + /* NOR flash controller commands */ + SFLASH_RD_TRIGGER = 1 << 0, + SFLASH_READSTATUS = 1 << 1, + SFLASH_PRG_CMD = 1 << 2, + SFLASH_WR_TRIGGER = 1 << 4, + SFLASH_WRITESTATUS = 1 << 5, + SFLASH_AUTOINC = 1 << 7, + /* NOR flash commands */ + SFLASH_OP_WREN = 0x6, + SECTOR_ERASE_CMD = 0x20, + SFLASH_UNPROTECTED = 0x0 +}; + +/* register Offset */ +struct mt8173_nor_regs { + u32 cmd; + u32 cnt; + u32 rdsr; + u32 rdata; + u32 radr[3]; + u32 wdata; + u32 prgdata[6]; + u32 shreg[10]; + u32 cfg[2]; + u32 shreg10; + u32 status[5]; + u32 timing; + u32 flash_cfg; + u32 reserved2[3]; + u32 sf_time; + u32 reserved3; + u32 diff_addr; + u32 del_sel[2]; + u32 intrstus; + u32 intren; + u32 pp_ctl; + u32 cfg3; + u32 chksum_ctl; + u32 chksum; + u32 aaicmd; + u32 wrprot; + u32 radr3; + u32 read_dual; + u32 delsel[3]; +}; +check_member(mt8173_nor_regs, delsel[2], 0xD8); +static struct mt8173_nor_regs * const mt8173_nor = (void *)SFLASH_REG_BASE; + +struct spi_flash *mt8173_nor_flash_probe(struct spi_slave *spi); +#endif /* __SOC_MEDIATEK_MT8173_FLASH_CONTROLLER_H__ */ diff --git a/src/soc/mediatek/mt8173/spi.c b/src/soc/mediatek/mt8173/spi.c index c3c71c3db2..dc674f371e 100644 --- a/src/soc/mediatek/mt8173/spi.c +++ b/src/soc/mediatek/mt8173/spi.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include #include @@ -161,6 +162,7 @@ static void mtk_spi_dump_data(const char *name, const uint8_t *data, struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs) { struct mtk_spi_bus *eslave; + static struct spi_slave slave; switch (bus) { case CONFIG_EC_GOOGLE_CHROMEEC_SPI_BUS: @@ -168,6 +170,12 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs) assert(read32(&eslave->regs->spi_cfg0_reg) != 0); spi_sw_reset(eslave->regs); return &eslave->slave; + case CONFIG_BOOT_MEDIA_SPI_BUS: + slave.bus = bus; + slave.cs = cs; + slave.force_programmer_specific = 1; + slave.programmer_specific_probe = &mt8173_nor_flash_probe; + return &slave; default: die ("wrong bus number.\n"); }; -- cgit v1.2.3