diff --git a/plat/mediatek/mt8183/drivers/uart/uart.c b/plat/mediatek/mt8183/drivers/uart/uart.c new file mode 100644 index 0000000..3c6a980 --- /dev/null +++ b/plat/mediatek/mt8183/drivers/uart/uart.c @@ -0,0 +1,111 @@ +/* + * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include +#include + +static struct mt_uart uart_save_addr[DRV_SUPPORT_UART_PORTS]; + +static const unsigned int uart_base_addr[DRV_SUPPORT_UART_PORTS] = { + UART0_BASE, + UART1_BASE +}; + +void mt_uart_restore(void) +{ + int uart_idx = UART_PORT0; + struct mt_uart *uart; + unsigned long base; + + /* Must NOT print any debug log before UART restore */ + for (uart_idx = UART_PORT0; uart_idx < HW_SUPPORT_UART_PORTS; + uart_idx++) { + + uart = &uart_save_addr[uart_idx]; + base = uart->base; + + mmio_write_32(UART_LCR(base), UART_LCR_MODE_B); + mmio_write_32(UART_EFR(base), uart->registers.efr); + mmio_write_32(UART_LCR(base), uart->registers.lcr); + mmio_write_32(UART_FCR(base), uart->registers.fcr); + + /* baudrate */ + mmio_write_32(UART_HIGHSPEED(base), uart->registers.highspeed); + mmio_write_32(UART_FRACDIV_L(base), uart->registers.fracdiv_l); + mmio_write_32(UART_FRACDIV_M(base), uart->registers.fracdiv_m); + mmio_write_32(UART_LCR(base), + uart->registers.lcr | UART_LCR_DLAB); + mmio_write_32(UART_DLL(base), uart->registers.dll); + mmio_write_32(UART_DLH(base), uart->registers.dlh); + mmio_write_32(UART_LCR(base), uart->registers.lcr); + mmio_write_32(UART_SAMPLE_COUNT(base), + uart->registers.sample_count); + mmio_write_32(UART_SAMPLE_POINT(base), + uart->registers.sample_point); + mmio_write_32(UART_GUARD(base), uart->registers.guard); + + /* flow control */ + mmio_write_32(UART_ESCAPE_EN(base), uart->registers.escape_en); + mmio_write_32(UART_MCR(base), uart->registers.mcr); + mmio_write_32(UART_IER(base), uart->registers.ier); + mmio_write_32(UART_SCR(base), uart->registers.scr); + } +} + +void mt_uart_save(void) +{ + int uart_idx = UART_PORT0; + struct mt_uart *uart; + unsigned long base; + + for (uart_idx = UART_PORT0; uart_idx < HW_SUPPORT_UART_PORTS; + uart_idx++) { + + uart_save_addr[uart_idx].base = uart_base_addr[uart_idx]; + base = uart_base_addr[uart_idx]; + uart = &uart_save_addr[uart_idx]; + uart->registers.lcr = mmio_read_32(UART_LCR(base)); + + mmio_write_32(UART_LCR(base), UART_LCR_MODE_B); + uart->registers.efr = mmio_read_32(UART_EFR(base)); + mmio_write_32(UART_LCR(base), uart->registers.lcr); + uart->registers.fcr = mmio_read_32(UART_FCR_RD(base)); + + /* baudrate */ + uart->registers.highspeed = mmio_read_32(UART_HIGHSPEED(base)); + uart->registers.fracdiv_l = mmio_read_32(UART_FRACDIV_L(base)); + uart->registers.fracdiv_m = mmio_read_32(UART_FRACDIV_M(base)); + mmio_write_32(UART_LCR(base), + uart->registers.lcr | UART_LCR_DLAB); + uart->registers.dll = mmio_read_32(UART_DLL(base)); + uart->registers.dlh = mmio_read_32(UART_DLH(base)); + mmio_write_32(UART_LCR(base), uart->registers.lcr); + uart->registers.sample_count = mmio_read_32( + UART_SAMPLE_COUNT(base)); + uart->registers.sample_point = mmio_read_32( + UART_SAMPLE_POINT(base)); + uart->registers.guard = mmio_read_32(UART_GUARD(base)); + + /* flow control */ + uart->registers.escape_en = mmio_read_32(UART_ESCAPE_EN(base)); + uart->registers.mcr = mmio_read_32(UART_MCR(base)); + uart->registers.ier = mmio_read_32(UART_IER(base)); + uart->registers.scr = mmio_read_32(UART_SCR(base)); + } +} + +void mt_console_uart_cg(int on) +{ + if (on) + mmio_write_32(UART_CLOCK_GATE_CLR, UART0_CLOCK_GATE_BIT); + else + mmio_write_32(UART_CLOCK_GATE_SET, UART0_CLOCK_GATE_BIT); +} + +int mt_console_uart_cg_status(void) +{ + return mmio_read_32(UART_CLOCK_GATE_STA) & UART0_CLOCK_GATE_BIT; +} diff --git a/plat/mediatek/mt8183/drivers/uart/uart.h b/plat/mediatek/mt8183/drivers/uart/uart.h new file mode 100644 index 0000000..be04c35 --- /dev/null +++ b/plat/mediatek/mt8183/drivers/uart/uart.h @@ -0,0 +1,100 @@ +/* + * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef __UART_H__ +#define __UART_H__ + +#include + +/* UART HW information */ +#define HW_SUPPORT_UART_PORTS 2 +#define DRV_SUPPORT_UART_PORTS 2 + +/* console UART clock cg */ +#define UART_CLOCK_GATE_SET (INFRACFG_AO_BASE + 0x80) +#define UART_CLOCK_GATE_CLR (INFRACFG_AO_BASE + 0x84) +#define UART_CLOCK_GATE_STA (INFRACFG_AO_BASE + 0x90) +#define UART0_CLOCK_GATE_BIT (1U<<22) +#define UART1_CLOCK_GATE_BIT (1U<<23) + +/* UART registers */ +#define UART_RBR(_baseaddr) (_baseaddr + 0x0) +#define UART_THR(_baseaddr) (_baseaddr + 0x0) +#define UART_IER(_baseaddr) (_baseaddr + 0x4) +#define UART_IIR(_baseaddr) (_baseaddr + 0x8) +#define UART_FCR(_baseaddr) (_baseaddr + 0x8) +#define UART_LCR(_baseaddr) (_baseaddr + 0xc) +#define UART_MCR(_baseaddr) (_baseaddr + 0x10) +#define UART_LSR(_baseaddr) (_baseaddr + 0x14) +#define UART_MSR(_baseaddr) (_baseaddr + 0x18) +#define UART_SCR(_baseaddr) (_baseaddr + 0x1c) +#define UART_DLL(_baseaddr) (_baseaddr + 0x0) +#define UART_DLH(_baseaddr) (_baseaddr + 0x4) +#define UART_EFR(_baseaddr) (_baseaddr + 0x8) +#define UART_XON1(_baseaddr) (_baseaddr + 0x10) +#define UART_XON2(_baseaddr) (_baseaddr + 0x14) +#define UART_XOFF1(_baseaddr) (_baseaddr + 0x18) +#define UART_XOFF2(_baseaddr) (_baseaddr + 0x1c) +#define UART_AUTOBAUD(_baseaddr) (_baseaddr + 0x20) +#define UART_HIGHSPEED(_baseaddr) (_baseaddr + 0x24) +#define UART_SAMPLE_COUNT(_baseaddr) (_baseaddr + 0x28) +#define UART_SAMPLE_POINT(_baseaddr) (_baseaddr + 0x2c) +#define UART_AUTOBAUD_REG(_baseaddr) (_baseaddr + 0x30) +#define UART_RATE_FIX_REG(_baseaddr) (_baseaddr + 0x34) +#define UART_AUTO_BAUDSAMPLE(_baseaddr) (_baseaddr + 0x38) +#define UART_GUARD(_baseaddr) (_baseaddr + 0x3c) +#define UART_ESCAPE_DAT(_baseaddr) (_baseaddr + 0x40) +#define UART_ESCAPE_EN(_baseaddr) (_baseaddr + 0x44) +#define UART_SLEEP_EN(_baseaddr) (_baseaddr + 0x48) +#define UART_DMA_EN(_baseaddr) (_baseaddr + 0x4c) +#define UART_RXTRI_AD(_baseaddr) (_baseaddr + 0x50) +#define UART_FRACDIV_L(_baseaddr) (_baseaddr + 0x54) +#define UART_FRACDIV_M(_baseaddr) (_baseaddr + 0x58) +#define UART_FCR_RD(_baseaddr) (_baseaddr + 0x5C) +#define UART_USB_RX_SEL(_baseaddr) (_baseaddr + 0xB0) +#define UART_SLEEP_REQ(_baseaddr) (_baseaddr + 0xB4) +#define UART_SLEEP_ACK(_baseaddr) (_baseaddr + 0xB8) +#define UART_SPM_SEL(_baseaddr) (_baseaddr + 0xBC) +#define UART_LCR_DLAB 0x0080 +#define UART_LCR_MODE_B 0x00bf + +enum uart_port_ID { + UART_PORT0 = 0, + UART_PORT1 +}; + +struct mt_uart_register { + unsigned int dll; + unsigned int dlh; + unsigned int ier; + unsigned int lcr; + unsigned int mcr; + unsigned int fcr; + unsigned int lsr; + unsigned int scr; + unsigned int efr; + unsigned int highspeed; + unsigned int sample_count; + unsigned int sample_point; + unsigned int fracdiv_l; + unsigned int fracdiv_m; + unsigned int escape_en; + unsigned int guard; + unsigned int rx_sel; +}; + +struct mt_uart { + unsigned long base; + struct mt_uart_register registers; +}; + +/* external API */ +void mt_uart_save(void); +void mt_uart_restore(void); +void mt_console_uart_cg(int on); +int mt_console_uart_cg_status(void); + +#endif /* __UART_H__ */ diff --git a/plat/mediatek/mt8183/include/platform_def.h b/plat/mediatek/mt8183/include/platform_def.h index f802ac2..dab265b 100644 --- a/plat/mediatek/mt8183/include/platform_def.h +++ b/plat/mediatek/mt8183/include/platform_def.h @@ -87,6 +87,7 @@ * UART related constants ******************************************************************************/ #define UART0_BASE (IO_PHYS + 0x01002000) +#define UART1_BASE (IO_PHYS + 0x01003000) #define UART_BAUDRATE 115200 #define UART_CLOCK 26000000 diff --git a/plat/mediatek/mt8183/platform.mk b/plat/mediatek/mt8183/platform.mk index 09fd133..3053a87 100644 --- a/plat/mediatek/mt8183/platform.mk +++ b/plat/mediatek/mt8183/platform.mk @@ -13,6 +13,7 @@ -I${MTK_PLAT_SOC}/drivers/gpio/ \ -I${MTK_PLAT_SOC}/drivers/pmic/ \ -I${MTK_PLAT_SOC}/drivers/rtc/ \ + -I${MTK_PLAT_SOC}/drivers/uart/ \ -I${MTK_PLAT_SOC}/include/ PLAT_BL_COMMON_SOURCES := lib/xlat_tables/aarch64/xlat_tables.c \ @@ -47,6 +48,7 @@ ${MTK_PLAT_SOC}/drivers/rtc/rtc.c \ ${MTK_PLAT_SOC}/drivers/spmc/mtspmc.c \ ${MTK_PLAT_SOC}/drivers/gpio/mtgpio.c \ + ${MTK_PLAT_SOC}/drivers/uart/uart.c \ ${MTK_PLAT_SOC}/plat_pm.c \ ${MTK_PLAT_SOC}/plat_topology.c \ ${MTK_PLAT_SOC}/plat_mt_gic.c \