diff options
Diffstat (limited to 'arch/blackfin/cpu/serial.c')
| -rw-r--r-- | arch/blackfin/cpu/serial.c | 81 |
1 files changed, 49 insertions, 32 deletions
diff --git a/arch/blackfin/cpu/serial.c b/arch/blackfin/cpu/serial.c index 64340ec67..9847e9f2c 100644 --- a/arch/blackfin/cpu/serial.c +++ b/arch/blackfin/cpu/serial.c @@ -43,7 +43,6 @@ #include <serial.h> #include <linux/compiler.h> #include <asm/blackfin.h> -#include <asm/mach-common/bits/uart.h> DECLARE_GLOBAL_DATA_PTR; @@ -52,8 +51,8 @@ DECLARE_GLOBAL_DATA_PTR; #include "serial.h" #ifdef CONFIG_DEBUG_SERIAL -static uint16_t cached_lsr[256]; -static uint16_t cached_rbr[256]; +static uart_lsr_t cached_lsr[256]; +static uart_lsr_t cached_rbr[256]; static size_t cache_count; /* The LSR is read-to-clear on some parts, so we have to make sure status @@ -61,10 +60,10 @@ static size_t cache_count; * works around anomaly 05000099 at the same time by keeping a cumulative * tally of all the status bits. */ -static uint16_t uart_lsr_save; -static uint16_t uart_lsr_read(uint32_t uart_base) +static uart_lsr_t uart_lsr_save; +static uart_lsr_t uart_lsr_read(uint32_t uart_base) { - uint16_t lsr = bfin_read(&pUART->lsr); + uart_lsr_t lsr = _lsr_read(pUART); uart_lsr_save |= (lsr & (OE|PE|FE|BI)); return lsr | uart_lsr_save; } @@ -72,20 +71,20 @@ static uint16_t uart_lsr_read(uint32_t uart_base) static void uart_lsr_clear(uint32_t uart_base) { uart_lsr_save = 0; - bfin_write(&pUART->lsr, bfin_read(&pUART->lsr) | -1); + _lsr_write(pUART, -1); } #else /* When debugging is disabled, we only care about the DR bit, so if other * bits get set/cleared, we don't really care since we don't read them * anyways (and thus anomaly 05000099 is irrelevant). */ -static inline uint16_t uart_lsr_read(uint32_t uart_base) +static inline uart_lsr_t uart_lsr_read(uint32_t uart_base) { - return bfin_read(&pUART->lsr); + return _lsr_read(pUART); } static void uart_lsr_clear(uint32_t uart_base) { - bfin_write(&pUART->lsr, bfin_read(&pUART->lsr) | -1); + _lsr_write(pUART, -1); } #endif @@ -127,20 +126,14 @@ static int uart_getc(uint32_t uart_base) #ifdef CONFIG_DEBUG_SERIAL /* grab & clear the LSR */ - uint16_t uart_lsr_val = uart_lsr_read(uart_base); + uart_lsr_t uart_lsr_val = uart_lsr_read(uart_base); cached_lsr[cache_count] = uart_lsr_val; cached_rbr[cache_count] = uart_rbr_val; cache_count = (cache_count + 1) % ARRAY_SIZE(cached_lsr); if (uart_lsr_val & (OE|PE|FE|BI)) { - uint16_t dll, dlh; printf("\n[SERIAL ERROR]\n"); - ACCESS_LATCH(); - dll = bfin_read(&pUART->dll); - dlh = bfin_read(&pUART->dlh); - ACCESS_PORT_IER(); - printf("\tDLL=0x%x DLH=0x%x\n", dll, dlh); do { --cache_count; printf("\t%3zu: RBR=0x%02x LSR=0x%02x\n", cache_count, @@ -160,6 +153,8 @@ static int uart_getc(uint32_t uart_base) # define LOOP(x) #endif +#if BFIN_UART_HW_VER < 4 + LOOP( static void uart_loop(uint32_t uart_base, int state) { @@ -178,6 +173,28 @@ static void uart_loop(uint32_t uart_base, int state) } ) +#else + +LOOP( +static void uart_loop(uint32_t uart_base, int state) +{ + u32 control; + + /* Drain the TX fifo first so bytes don't come back */ + while (!(uart_lsr_read(uart_base) & TEMT)) + continue; + + control = bfin_read(&pUART->control); + if (state) + control |= LOOP_ENA | MRTS; + else + control &= ~(LOOP_ENA | MRTS); + bfin_write(&pUART->control, control); +} +) + +#endif + #ifdef CONFIG_SYS_BFIN_UART static void uart_puts(uint32_t uart_base, const char *s) @@ -246,16 +263,16 @@ struct serial_device bfin_serial##n##_device = { \ LOOP(.loop = uart##n##_loop) \ }; -#ifdef UART0_DLL +#ifdef UART0_RBR DECL_BFIN_UART(0) #endif -#ifdef UART1_DLL +#ifdef UART1_RBR DECL_BFIN_UART(1) #endif -#ifdef UART2_DLL +#ifdef UART2_RBR DECL_BFIN_UART(2) #endif -#ifdef UART3_DLL +#ifdef UART3_RBR DECL_BFIN_UART(3) #endif @@ -274,16 +291,16 @@ __weak struct serial_device *default_serial_console(void) void bfin_serial_initialize(void) { -#ifdef UART0_DLL +#ifdef UART0_RBR serial_register(&bfin_serial0_device); #endif -#ifdef UART1_DLL +#ifdef UART1_RBR serial_register(&bfin_serial1_device); #endif -#ifdef UART2_DLL +#ifdef UART2_RBR serial_register(&bfin_serial2_device); #endif -#ifdef UART3_DLL +#ifdef UART3_RBR serial_register(&bfin_serial3_device); #endif } @@ -293,7 +310,7 @@ void bfin_serial_initialize(void) /* Symbol for our assembly to call. */ void serial_set_baud(uint32_t baud) { - serial_early_set_baud(UART_DLL, baud); + serial_early_set_baud(UART_BASE, baud); } /* Symbol for common u-boot code to call. @@ -307,7 +324,7 @@ void serial_setbrg(void) /* Symbol for our assembly to call. */ void serial_initialize(void) { - serial_early_init(UART_DLL); + serial_early_init(UART_BASE); } /* Symbol for common u-boot code to call. */ @@ -315,23 +332,23 @@ int serial_init(void) { serial_initialize(); serial_setbrg(); - uart_lsr_clear(UART_DLL); + uart_lsr_clear(UART_BASE); return 0; } int serial_tstc(void) { - return uart_tstc(UART_DLL); + return uart_tstc(UART_BASE); } int serial_getc(void) { - return uart_getc(UART_DLL); + return uart_getc(UART_BASE); } void serial_putc(const char c) { - uart_putc(UART_DLL, c); + uart_putc(UART_BASE, c); } void serial_puts(const char *s) @@ -343,7 +360,7 @@ void serial_puts(const char *s) LOOP( void serial_loop(int state) { - uart_loop(UART_DLL, state); + uart_loop(UART_BASE, state); } ) |