diff options
Diffstat (limited to 'arch/blackfin/cpu/serial.h')
| -rw-r--r-- | arch/blackfin/cpu/serial.h | 70 |
1 files changed, 46 insertions, 24 deletions
diff --git a/arch/blackfin/cpu/serial.h b/arch/blackfin/cpu/serial.h index 7999a19..8a076dd 100644 --- a/arch/blackfin/cpu/serial.h +++ b/arch/blackfin/cpu/serial.h @@ -82,26 +82,28 @@ struct bfin_mmr_serial { #define __PASTE_UART(num, pfx, sfx) pfx##num##_##sfx #define _PASTE_UART(num, pfx, sfx) __PASTE_UART(num, pfx, sfx) -#define MMR_UART(mmr) _PASTE_UART(CONFIG_UART_CONSOLE, UART, DLL) -#define P_UART(pin) _PASTE_UART(CONFIG_UART_CONSOLE, P_UART, pin) +#define MMR_UART(n) _PASTE_UART(n, UART, DLL) +#define _P_UART(n, pin) _PASTE_UART(n, P_UART, pin) +#define P_UART(pin) _P_UART(CONFIG_UART_CONSOLE, pin) #ifndef UART_DLL -# define UART_DLL MMR_UART(DLL) +# define UART_DLL MMR_UART(CONFIG_UART_CONSOLE) #else +# define UART0_DLL UART_DLL # if CONFIG_UART_CONSOLE != 0 # error CONFIG_UART_CONSOLE must be 0 on parts with only one UART # endif #endif -#define pUART ((volatile struct bfin_mmr_serial *)UART_DLL) +#define pUART ((volatile struct bfin_mmr_serial *)uart_base) #if BFIN_UART_HW_VER == 2 # define ACCESS_LATCH() # define ACCESS_PORT_IER() #else # define ACCESS_LATCH() \ - bfin_write16(&pUART->lcr, bfin_read16(&pUART->lcr) | DLAB) + bfin_write(&pUART->lcr, bfin_read(&pUART->lcr) | DLAB) # define ACCESS_PORT_IER() \ - bfin_write16(&pUART->lcr, bfin_read16(&pUART->lcr) & ~DLAB) + bfin_write(&pUART->lcr, bfin_read(&pUART->lcr) & ~DLAB) #endif __attribute__((always_inline)) @@ -168,30 +170,47 @@ static inline void serial_do_portmux(void) } __attribute__((always_inline)) -static inline void serial_early_init(void) +static inline int uart_init(uint32_t uart_base) { - /* handle portmux crap on different Blackfins */ - serial_do_portmux(); - /* always enable UART -- avoids anomalies 05000309 and 05000350 */ - bfin_write16(&pUART->gctl, UCEN); + bfin_write(&pUART->gctl, UCEN); /* Set LCR to Word Lengh 8-bit word select */ - bfin_write16(&pUART->lcr, WLS_8); + bfin_write(&pUART->lcr, WLS_8); SSYNC(); + + return 0; } __attribute__((always_inline)) -static inline void serial_early_put_div(uint16_t divisor) +static inline int serial_early_init(uint32_t uart_base) +{ + /* handle portmux crap on different Blackfins */ + serial_do_portmux(); + + return uart_init(uart_base); +} + +__attribute__((always_inline)) +static inline int serial_early_uninit(uint32_t uart_base) +{ + /* disable the UART by clearing UCEN */ + bfin_write(&pUART->gctl, 0); + + return 0; +} + +__attribute__((always_inline)) +static inline void serial_early_put_div(uint32_t uart_base, uint16_t divisor) { /* Set DLAB in LCR to Access DLL and DLH */ ACCESS_LATCH(); SSYNC(); /* Program the divisor to get the baud rate we want */ - bfin_write16(&pUART->dll, LOB(divisor)); - bfin_write16(&pUART->dlh, HIB(divisor)); + bfin_write(&pUART->dll, LOB(divisor)); + bfin_write(&pUART->dlh, HIB(divisor)); SSYNC(); /* Clear DLAB in LCR to Access THR RBR IER */ @@ -202,12 +221,14 @@ static inline void serial_early_put_div(uint16_t divisor) __attribute__((always_inline)) static inline uint16_t serial_early_get_div(void) { + uint32_t uart_base = UART_DLL; + /* Set DLAB in LCR to Access DLL and DLH */ ACCESS_LATCH(); SSYNC(); - uint8_t dll = bfin_read16(&pUART->dll); - uint8_t dlh = bfin_read16(&pUART->dlh); + uint8_t dll = bfin_read(&pUART->dll); + uint8_t dlh = bfin_read(&pUART->dlh); uint16_t divisor = (dlh << 8) | dll; /* Clear DLAB in LCR to Access THR RBR IER */ @@ -223,13 +244,14 @@ static inline uint16_t serial_early_get_div(void) #endif __attribute__((always_inline)) -static inline void serial_early_set_baud(uint32_t baud) +static inline void serial_early_set_baud(uint32_t uart_base, uint32_t baud) { /* Translate from baud into divisor in terms of SCLK. The * weird multiplication is to make sure we over sample just * a little rather than under sample the incoming signals. */ - serial_early_put_div((get_sclk() + (baud * 8)) / (baud * 16) - ANOMALY_05000230); + serial_early_put_div(uart_base, + (get_sclk() + (baud * 8)) / (baud * 16) - ANOMALY_05000230); } #ifndef BFIN_IN_INITCODE @@ -266,16 +288,16 @@ static inline void serial_early_puts(const char *s) */ #ifdef CONFIG_DEBUG_EARLY_SERIAL # define serial_early_puts(str) \ - call _get_pc; \ - jump 1f; \ + .section .rodata; \ + 7: \ .ascii "Early:"; \ .ascii __FILE__; \ .ascii ": "; \ .ascii str; \ .asciz "\n"; \ - .align 4; \ -1: \ - R0 += 2; \ + .previous; \ + R0.L = 7b; \ + R0.H = 7b; \ call _serial_puts; #else # define serial_early_puts(str) |