diff options
Diffstat (limited to 'arch/arm/cpu/armv7/am33xx')
| -rw-r--r-- | arch/arm/cpu/armv7/am33xx/Kconfig | 40 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/am33xx/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/am33xx/clk_synthesizer.c | 104 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/am33xx/config.mk | 20 |
4 files changed, 166 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/am33xx/Kconfig b/arch/arm/cpu/armv7/am33xx/Kconfig new file mode 100644 index 0000000000..dc51e9b697 --- /dev/null +++ b/arch/arm/cpu/armv7/am33xx/Kconfig @@ -0,0 +1,40 @@ +if AM43XX +config TARGET_AM43XX_EVM + bool "Support am43xx_evm" + select TI_I2C_BOARD_DETECT + help + This option specifies support for the AM43xx + GP and HS EVM development platforms.The AM437x + GP EVM is a standalone test, development, and + evaluation module system that enables developers + to write software and develop hardware around + an AM43xx processor subsystem. + +config ISW_ENTRY_ADDR + hex "Address in memory or XIP flash of bootloader entry point" + help + After any reset, the boot ROM on the AM43XX SOC + searches the boot media for a valid boot image. + For non-XIP devices, the ROM then copies the + image into internal memory. + For all boot modes, after the ROM processes the + boot image it eventually computes the entry + point address depending on the device type + (secure/non-secure), boot media (xip/non-xip) and + image headers. + default 0x402F4000 + +config PUB_ROM_DATA_SIZE + hex "Size in bytes of the L3 SRAM reserved by ROM to store data" + help + During the device boot, the public ROM uses the top of + the public L3 OCMC RAM to store r/w data like stack, + heap, globals etc. When the ROM is copying the boot + image from the boot media into memory, the image must + not spill over into this area. This value can be used + during compile time to determine the maximum size of a + boot image. Once the ROM transfers control to the boot + image, this area is no longer used, and can be reclaimed + for run time use by the boot image. + default 0x8400 +endif diff --git a/arch/arm/cpu/armv7/am33xx/Makefile b/arch/arm/cpu/armv7/am33xx/Makefile index aae3f096b2..6fda4825fc 100644 --- a/arch/arm/cpu/armv7/am33xx/Makefile +++ b/arch/arm/cpu/armv7/am33xx/Makefile @@ -18,3 +18,5 @@ obj-y += ddr.o obj-y += emif4.o obj-y += board.o obj-y += mux.o + +obj-$(CONFIG_CLOCK_SYNTHESIZER) += clk_synthesizer.o diff --git a/arch/arm/cpu/armv7/am33xx/clk_synthesizer.c b/arch/arm/cpu/armv7/am33xx/clk_synthesizer.c new file mode 100644 index 0000000000..316e677c65 --- /dev/null +++ b/arch/arm/cpu/armv7/am33xx/clk_synthesizer.c @@ -0,0 +1,104 @@ +/* + * clk-synthesizer.c + * + * Clock synthesizer apis + * + * Copyright (C) 2016, Texas Instruments, Incorporated - http://www.ti.com/ + * + * SPDX-License-Identifier: GPL-2.0+ + */ + + +#include <common.h> +#include <asm/arch/clk_synthesizer.h> +#include <i2c.h> + +/** + * clk_synthesizer_reg_read - Read register from synthesizer. + * @addr: addr within the i2c device + * buf: Buffer to which value is to be read. + * + * For reading the register from this clock synthesizer, a command needs to + * be send along with enabling byte read more, and then read can happen. + * Returns 0 on success + */ +static int clk_synthesizer_reg_read(int addr, uint8_t *buf) +{ + int rc; + + /* Enable Bye read */ + addr = addr | CLK_SYNTHESIZER_BYTE_MODE; + + /* Send the command byte */ + rc = i2c_write(CLK_SYNTHESIZER_I2C_ADDR, addr, 1, buf, 1); + if (rc) + printf("Failed to send command to clock synthesizer\n"); + + /* Read the Data */ + return i2c_read(CLK_SYNTHESIZER_I2C_ADDR, addr, 1, buf, 1); +} + +/** + * clk_synthesizer_reg_write - Write a value to register in synthesizer. + * @addr: addr within the i2c device + * val: Value to be written in the addr. + * + * Enable the byte read mode in the address and start the i2c transfer. + * Returns 0 on success + */ +static int clk_synthesizer_reg_write(int addr, uint8_t val) +{ + uint8_t cmd[2]; + int rc = 0; + + /* Enable byte write */ + cmd[0] = addr | CLK_SYNTHESIZER_BYTE_MODE; + cmd[1] = val; + + rc = i2c_write(CLK_SYNTHESIZER_I2C_ADDR, addr, 1, cmd, 2); + if (rc) + printf("Clock synthesizer reg write failed at addr = 0x%x\n", + addr); + return rc; +} + +/** + * setup_clock_syntherizer - Program the clock synthesizer to get the desired + * frequency. + * @data: Data containing the desired output + * + * This is a PLL-based high performance synthesizer which gives 3 outputs + * as per the PLL_DIV and load capacitor programmed. + */ +int setup_clock_synthesizer(struct clk_synth *data) +{ + int rc; + uint8_t val; + + rc = i2c_probe(CLK_SYNTHESIZER_I2C_ADDR); + if (rc) { + printf("i2c probe failed at address 0x%x\n", + CLK_SYNTHESIZER_I2C_ADDR); + return rc; + } + + rc = clk_synthesizer_reg_read(CLK_SYNTHESIZER_ID_REG, &val); + if (val != data->id) + return rc; + + /* Crystal Load capacitor selection */ + rc = clk_synthesizer_reg_write(CLK_SYNTHESIZER_XCSEL, data->capacitor); + if (rc) + return rc; + rc = clk_synthesizer_reg_write(CLK_SYNTHESIZER_MUX_REG, data->mux); + if (rc) + return rc; + rc = clk_synthesizer_reg_write(CLK_SYNTHESIZER_PDIV2_REG, data->pdiv2); + if (rc) + return rc; + rc = clk_synthesizer_reg_write(CLK_SYNTHESIZER_PDIV3_REG, data->pdiv3); + if (rc) + return rc; + + return 0; +} diff --git a/arch/arm/cpu/armv7/am33xx/config.mk b/arch/arm/cpu/armv7/am33xx/config.mk index 5294d16708..6d95d327b4 100644 --- a/arch/arm/cpu/armv7/am33xx/config.mk +++ b/arch/arm/cpu/armv7/am33xx/config.mk @@ -3,9 +3,29 @@ # # SPDX-License-Identifier: GPL-2.0+ # + +include $(srctree)/$(CPUDIR)/omap-common/config_secure.mk + ifdef CONFIG_SPL_BUILD +ifeq ($(CONFIG_TI_SECURE_DEVICE),y) +# +# For booting from SPI use +# u-boot-spl_HS_SPI_X-LOADER to program flash +# +# For booting spl from all other media +# use u-boot-spl_HS_ISSW +# +# Refer to README.ti-secure for more info +# +ALL-y += u-boot-spl_HS_ISSW +ALL-$(CONFIG_SPL_SPI_SUPPORT) += u-boot-spl_HS_SPI_X-LOADER +else ALL-y += MLO ALL-$(CONFIG_SPL_SPI_SUPPORT) += MLO.byteswap +endif else +ifeq ($(CONFIG_TI_SECURE_DEVICE),y) +ALL-$(CONFIG_QSPI_BOOT) += u-boot_HS_XIP_X-LOADER +endif ALL-y += u-boot.img endif |