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Fix debug uart

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This commit is contained in:
Yule Hou 2018-12-08 04:00:19 +08:00
parent 20040ae70f
commit 71b0975730
5 changed files with 52 additions and 32 deletions
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6
bootloader/main.c
View file

@ -1155,8 +1155,10 @@ void ipl_main()
//Tegra/Horizon configuration goes to 0x80000000+, package2 goes to 0xA9800000, we place our heap in between.
heap_init(0x90020000);
//uart_send(UART_C, (u8 *)0x40000000, 0x10000);
//uart_wait_idle(UART_C, UART_TX_IDLE);
#ifdef DEBUG_UART_PORT
//uart_send(DEBUG_UART_PORT, (u8 *)0x40000000, 0x10000);
//uart_wait_idle(DEBUG_UART_PORT, UART_TX_IDLE);
#endif
// Set bootloader's default configuration.
set_default_configuration();

10
bootloader/soc/hw_init.c
View file

@ -64,8 +64,12 @@ void _config_gpios()
PINMUX_AUX(PINMUX_AUX_GPIO_PE6) = PINMUX_INPUT_ENABLE;
PINMUX_AUX(PINMUX_AUX_GPIO_PH6) = PINMUX_INPUT_ENABLE;
#if !defined (DEBUG_UART_PORT) || DEBUG_UART_PORT != UART_B
gpio_config(GPIO_PORT_G, GPIO_PIN_0, GPIO_MODE_GPIO);
#endif
#if !defined (DEBUG_UART_PORT) || DEBUG_UART_PORT != UART_C
gpio_config(GPIO_PORT_D, GPIO_PIN_1, GPIO_MODE_GPIO);
#endif
gpio_config(GPIO_PORT_E, GPIO_PIN_6, GPIO_MODE_GPIO);
gpio_config(GPIO_PORT_H, GPIO_PIN_6, GPIO_MODE_GPIO);
gpio_output_enable(GPIO_PORT_G, GPIO_PIN_0, GPIO_OUTPUT_DISABLE);
@ -187,8 +191,10 @@ void config_hw()
APB_MISC(APB_MISC_PP_PINMUX_GLOBAL) = 0;
_config_gpios();
//clock_enable_uart(UART_C);
//uart_init(UART_C, 115200);
#ifdef DEBUG_UART_PORT
clock_enable_uart(DEBUG_UART_PORT);
uart_init(DEBUG_UART_PORT, 115200);
#endif
clock_enable_cl_dvfs();

4
bootloader/soc/pinmux.c
View file

@ -19,8 +19,8 @@
void pinmux_config_uart(u32 idx)
{
PINMUX_AUX(PINMUX_AUX_UARTX_RX(idx)) = 0;
PINMUX_AUX(PINMUX_AUX_UARTX_TX(idx)) = PINMUX_INPUT_ENABLE | PINMUX_PULL_UP;
PINMUX_AUX(PINMUX_AUX_UARTX_TX(idx)) = 0;
PINMUX_AUX(PINMUX_AUX_UARTX_RX(idx)) = PINMUX_INPUT_ENABLE | PINMUX_PULL_UP;
PINMUX_AUX(PINMUX_AUX_UARTX_RTS(idx)) = 0;
PINMUX_AUX(PINMUX_AUX_UARTX_CTS(idx)) = PINMUX_INPUT_ENABLE | PINMUX_PULL_DOWN;
}

47
bootloader/soc/uart.c
View file

@ -25,32 +25,37 @@ void uart_init(u32 idx, u32 baud)
{
uart_t *uart = (uart_t *)(UART_BASE + uart_baseoff[idx]);
//Set baud rate.
u32 rate = (8 * baud + 408000000) / (16 * baud);
uart->UART_LCR = 0x80; //Enable DLAB.
uart->UART_THR_DLAB = (u8)rate; //Divisor latch LSB.
uart->UART_IER_DLAB = (u8)(rate >> 8); //Divisor latch MSB.
uart->UART_LCR = 0; //Diable DLAB.
// Make sure no data is being sent.
uart_wait_idle(idx, UART_TX_IDLE);
//Setup UART in fifo mode.
uart->UART_IER_DLAB = 0;
uart->UART_IIR_FCR = 7; //Enable and clear TX and RX FIFOs.
(void)uart->UART_LSR;
// Misc settings.
u32 rate = (8 * baud + 408000000) / (16 * baud);
uart->UART_IER_DLAB = 0; // Disable interrupts.
uart->UART_MCR = 0; // Disable hardware flow control.
uart->UART_LCR = UART_LCR_DLAB | UART_LCR_WORD_LENGTH_8; // Enable DLAB & set 8n1 mode.
uart->UART_THR_DLAB = (u8)rate; // Divisor latch LSB.
uart->UART_IER_DLAB = (u8)(rate >> 8); // Divisor latch MSB.
uart->UART_LCR = UART_LCR_WORD_LENGTH_8; // Diable DLAB.
// Setup and flush fifo.
uart->UART_IIR_FCR = UART_IIR_FCR_EN_FIFO | UART_IIR_FCR_RX_CLR | UART_IIR_FCR_TX_CLR;
usleep(3 * ((baud + 999999) / baud));
uart->UART_LCR = 3; //Set word length 8.
uart->UART_MCR = 0;
uart->UART_MSR = 0;
uart->UART_IRDA_CSR = 0;
uart->UART_RX_FIFO_CFG = 1;
uart->UART_MIE = 0;
uart->UART_ASR = 0;
uart_wait_idle(idx, UART_TX_IDLE | UART_RX_IDLE);
}
void uart_wait_idle(u32 idx, u32 which)
{
uart_t *uart = (uart_t *)(UART_BASE + uart_baseoff[idx]);
while (!(uart->UART_VENDOR_STATUS & which))
;
if (UART_TX_IDLE & which)
{
while (!(uart->UART_LSR & UART_LSR_TMTY))
;
}
if (UART_RX_IDLE & which)
{
while (uart->UART_LSR & UART_LSR_RDR)
;
}
}
void uart_send(u32 idx, u8 *buf, u32 len)
@ -59,7 +64,7 @@ void uart_send(u32 idx, u8 *buf, u32 len)
for (u32 i = 0; i != len; i++)
{
while (uart->UART_LSR & UART_TX_FIFO_FULL)
while (!(uart->UART_LSR & UART_LSR_THRE))
;
uart->UART_THR_DLAB = buf[i];
};
@ -71,7 +76,7 @@ void uart_recv(u32 idx, u8 *buf, u32 len)
for (u32 i = 0; i != len; i++)
{
while (uart->UART_LSR & UART_RX_FIFO_EMPTY)
while (!(uart->UART_LSR & UART_LSR_RDR))
;
buf[i] = uart->UART_THR_DLAB;
};

15
bootloader/soc/uart.h
View file

@ -28,10 +28,17 @@
#define BAUD_115200 115200
#define UART_TX_IDLE 0x00000001
#define UART_RX_IDLE 0x00000002
#define UART_TX_FIFO_FULL 0x100
#define UART_RX_FIFO_EMPTY 0x200
#define UART_TX_IDLE 0x1
#define UART_RX_IDLE 0x2
#define UART_LCR_DLAB 0x80
#define UART_LCR_WORD_LENGTH_8 0x3
#define UART_LSR_RDR 0x1
#define UART_LSR_THRE 0x20
#define UART_LSR_TMTY 0x40
#define UART_IIR_FCR_TX_CLR 0x4
#define UART_IIR_FCR_RX_CLR 0x2
#define UART_IIR_FCR_EN_FIFO 0x1
typedef struct _uart_t
{