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v1.0.3

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刘可亮
2024-01-27 08:47:24 +08:00
parent d3bd993b5f
commit 9f7ba67007
2345 changed files with 74421 additions and 76616 deletions
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39
bsp/artinchip/drv_bare/uart/uart.c
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@@ -13,6 +13,8 @@
#include <driver.h>
#include <uart.h>
#define AIC_CLK_UART_MAX_FREQ 100000000 /* max 100M*/
#ifndef AIC_CLK_UART0_FREQ
#define AIC_CLK_UART0_FREQ 48000000 /* default 48M*/
#endif
@@ -270,8 +272,10 @@ int uart_config_update(int id, int baudrate)
{
const struct drv_uart_dev_para *p;
u32 data_bits, stop_bits, parity;
int i;
int ret = 0;
int freq, parent_clk_id, parent_freq;
int cmu_div, uart_div, real_baudrate;
u64 err, min_err = baudrate / 40;
int i, ret = 0;
p = NULL;
for (i = 0; i < ARRAY_SIZE(uart_dev_paras); i++) {
@@ -283,6 +287,37 @@ int uart_config_update(int id, int baudrate)
if (!p)
return -ENODEV;
parent_clk_id = hal_clk_get_parent(CLK_UART0 + id);
parent_freq = hal_clk_get_freq(parent_clk_id);
freq = p->clk_freq;
#if defined(AIC_CMU_DRV_V12)
for (cmu_div = 16; cmu_div > 0; cmu_div--) {
#else
for (cmu_div = 32; cmu_div > 0; cmu_div--) {
#endif
if ((parent_freq / cmu_div) > AIC_CLK_UART_MAX_FREQ)
continue;
for (uart_div = 1; uart_div < 65536; uart_div++) {
real_baudrate = parent_freq / (cmu_div * 16 * uart_div);
err = abs(baudrate - real_baudrate);
if (err < min_err) {
freq = parent_freq / cmu_div;
min_err = err;
}
}
}
if (min_err >= (baudrate / 40)) {
printf("Error is too large for this baud rate.\n");
return -1;
}
hal_clk_set_freq(CLK_UART0 + id, freq);
hal_clk_enable(CLK_UART0 + id);
hal_reset_assert(RESET_UART0 + id);
hal_reset_deassert(RESET_UART0 + id);
data_bits = get_data_bits(p->data_bits);
stop_bits = get_stop_bits(p->stop_bits);
parity = get_parity(p->parity);