diff options
Diffstat (limited to 'arch/blackfin/cpu')
| -rw-r--r-- | arch/blackfin/cpu/serial.c | 81 | ||||
| -rw-r--r-- | arch/blackfin/cpu/serial.h | 222 | ||||
| -rw-r--r-- | arch/blackfin/cpu/serial1.h | 348 | ||||
| -rw-r--r-- | arch/blackfin/cpu/serial4.h | 161 |
4 files changed, 574 insertions, 238 deletions
diff --git a/arch/blackfin/cpu/serial.c b/arch/blackfin/cpu/serial.c index 64340ec..9847e9f 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); } ) diff --git a/arch/blackfin/cpu/serial.h b/arch/blackfin/cpu/serial.h index 8a076dd..9200339 100644 --- a/arch/blackfin/cpu/serial.h +++ b/arch/blackfin/cpu/serial.h @@ -3,7 +3,7 @@ * any functions defined here must be always_inline since * initcode cannot have function calls. * - * Copyright (c) 2004-2007 Analog Devices Inc. + * Copyright (c) 2004-2011 Analog Devices Inc. * * Licensed under the GPL-2 or later. */ @@ -12,7 +12,7 @@ #define __BFIN_CPU_SERIAL_H__ #include <asm/blackfin.h> -#include <asm/mach-common/bits/uart.h> +#include <asm/portmux.h> #ifndef CONFIG_UART_CONSOLE # define CONFIG_UART_CONSOLE 0 @@ -24,88 +24,34 @@ # define BFIN_DEBUG_EARLY_SERIAL 0 #endif -#ifndef __ASSEMBLY__ - -#include <asm/portmux.h> - -#define LOB(x) ((x) & 0xFF) -#define HIB(x) (((x) >> 8) & 0xFF) - -#if defined(__ADSPBF50x__) || defined(__ADSPBF54x__) +#if defined(__ADSPBF60x__) +# define BFIN_UART_HW_VER 4 +#elif defined(__ADSPBF50x__) || defined(__ADSPBF54x__) # define BFIN_UART_HW_VER 2 #else # define BFIN_UART_HW_VER 1 #endif -/* - * All Blackfin system MMRs are padded to 32bits even if the register - * itself is only 16bits. So use a helper macro to streamline this. - */ -#define __BFP(m) u16 m; u16 __pad_##m -struct bfin_mmr_serial { -#if BFIN_UART_HW_VER == 2 - __BFP(dll); - __BFP(dlh); - __BFP(gctl); - __BFP(lcr); - __BFP(mcr); - __BFP(lsr); - __BFP(msr); - __BFP(scr); - __BFP(ier_set); - __BFP(ier_clear); - __BFP(thr); - __BFP(rbr); -#else - union { - u16 dll; - u16 thr; - const u16 rbr; - }; - const u16 __spad0; - union { - u16 dlh; - u16 ier; - }; - const u16 __spad1; - const __BFP(iir); - __BFP(lcr); - __BFP(mcr); - __BFP(lsr); - __BFP(msr); - __BFP(scr); - const u32 __spad2; - __BFP(gctl); -#endif -}; -#undef __BFP - #define __PASTE_UART(num, pfx, sfx) pfx##num##_##sfx #define _PASTE_UART(num, pfx, sfx) __PASTE_UART(num, pfx, sfx) -#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(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_base) -#if BFIN_UART_HW_VER == 2 -# define ACCESS_LATCH() -# define ACCESS_PORT_IER() +#ifndef __ASSEMBLY__ +__attribute__((always_inline)) +static inline void serial_do_portmux(void); +#endif + +#if BFIN_UART_HW_VER < 4 +# include "serial1.h" #else -# define ACCESS_LATCH() \ - bfin_write(&pUART->lcr, bfin_read(&pUART->lcr) | DLAB) -# define ACCESS_PORT_IER() \ - bfin_write(&pUART->lcr, bfin_read(&pUART->lcr) & ~DLAB) +# include "serial4.h" #endif +#ifndef __ASSEMBLY__ + __attribute__((always_inline)) static inline void serial_do_portmux(void) { @@ -115,143 +61,7 @@ static inline void serial_do_portmux(void) return; } -#if defined(__ADSPBF50x__) -# define DO_MUX(port, mux_tx, mux_rx, tx, rx) \ - bfin_write_PORT##port##_MUX((bfin_read_PORT##port##_MUX() & ~(PORT_x_MUX_##mux_tx##_MASK | PORT_x_MUX_##mux_rx##_MASK)) | PORT_x_MUX_##mux_tx##_FUNC_1 | PORT_x_MUX_##mux_rx##_FUNC_1); \ - bfin_write_PORT##port##_FER(bfin_read_PORT##port##_FER() | P##port##tx | P##port##rx); - switch (CONFIG_UART_CONSOLE) { - case 0: DO_MUX(G, 7, 7, 12, 13); break; /* Port G; mux 7; PG12 and PG13 */ - case 1: DO_MUX(F, 3, 3, 6, 7); break; /* Port F; mux 3; PF6 and PF7 */ - } - SSYNC(); -#elif defined(__ADSPBF51x__) -# define DO_MUX(port, mux_tx, mux_rx, tx, rx) \ - bfin_write_PORT##port##_MUX((bfin_read_PORT##port##_MUX() & ~(PORT_x_MUX_##mux_tx##_MASK | PORT_x_MUX_##mux_rx##_MASK)) | PORT_x_MUX_##mux_tx##_FUNC_2 | PORT_x_MUX_##mux_rx##_FUNC_2); \ - bfin_write_PORT##port##_FER(bfin_read_PORT##port##_FER() | P##port##tx | P##port##rx); - switch (CONFIG_UART_CONSOLE) { - case 0: DO_MUX(G, 5, 5, 9, 10); break; /* Port G; mux 5; PG9 and PG10 */ - case 1: DO_MUX(F, 2, 3, 14, 15); break; /* Port H; mux 2/3; PH14 and PH15 */ - } - SSYNC(); -#elif defined(__ADSPBF52x__) -# define DO_MUX(port, mux, tx, rx) \ - bfin_write_PORT##port##_MUX((bfin_read_PORT##port##_MUX() & ~PORT_x_MUX_##mux##_MASK) | PORT_x_MUX_##mux##_FUNC_3); \ - bfin_write_PORT##port##_FER(bfin_read_PORT##port##_FER() | P##port##tx | P##port##rx); - switch (CONFIG_UART_CONSOLE) { - case 0: DO_MUX(G, 2, 7, 8); break; /* Port G; mux 2; PG2 and PG8 */ - case 1: DO_MUX(F, 5, 14, 15); break; /* Port F; mux 5; PF14 and PF15 */ - } - SSYNC(); -#elif defined(__ADSPBF537__) || defined(__ADSPBF536__) || defined(__ADSPBF534__) - const uint16_t func[] = { PFDE, PFTE, }; - bfin_write_PORT_MUX(bfin_read_PORT_MUX() & ~func[CONFIG_UART_CONSOLE]); - bfin_write_PORTF_FER(bfin_read_PORTF_FER() | - (1 << P_IDENT(P_UART(RX))) | - (1 << P_IDENT(P_UART(TX)))); - SSYNC(); -#elif defined(__ADSPBF54x__) -# define DO_MUX(port, tx, rx) \ - bfin_write_PORT##port##_MUX((bfin_read_PORT##port##_MUX() & ~(PORT_x_MUX_##tx##_MASK | PORT_x_MUX_##rx##_MASK)) | PORT_x_MUX_##tx##_FUNC_1 | PORT_x_MUX_##rx##_FUNC_1); \ - bfin_write_PORT##port##_FER(bfin_read_PORT##port##_FER() | P##port##tx | P##port##rx); - switch (CONFIG_UART_CONSOLE) { - case 0: DO_MUX(E, 7, 8); break; /* Port E; PE7 and PE8 */ - case 1: DO_MUX(H, 0, 1); break; /* Port H; PH0 and PH1 */ - case 2: DO_MUX(B, 4, 5); break; /* Port B; PB4 and PB5 */ - case 3: DO_MUX(B, 6, 7); break; /* Port B; PB6 and PB7 */ - } - SSYNC(); -#elif defined(__ADSPBF561__) - /* UART pins could be GPIO, but they aren't pin muxed. */ -#else -# if (P_UART(RX) & P_DEFINED) || (P_UART(TX) & P_DEFINED) -# error "missing portmux logic for UART" -# endif -#endif -} - -__attribute__((always_inline)) -static inline int uart_init(uint32_t uart_base) -{ - /* always enable UART -- avoids anomalies 05000309 and 05000350 */ - bfin_write(&pUART->gctl, UCEN); - - /* Set LCR to Word Lengh 8-bit word select */ - bfin_write(&pUART->lcr, WLS_8); - - SSYNC(); - - return 0; -} - -__attribute__((always_inline)) -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_write(&pUART->dll, LOB(divisor)); - bfin_write(&pUART->dlh, HIB(divisor)); - SSYNC(); - - /* Clear DLAB in LCR to Access THR RBR IER */ - ACCESS_PORT_IER(); - SSYNC(); -} - -__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_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 */ - ACCESS_PORT_IER(); - SSYNC(); - - return divisor; -} - -/* We cannot use get_sclk() early on as it uses caches in external memory */ -#if defined(BFIN_IN_INITCODE) || defined(CONFIG_DEBUG_EARLY_SERIAL) -# define get_sclk() (CONFIG_CLKIN_HZ * CONFIG_VCO_MULT / CONFIG_SCLK_DIV) -#endif - -__attribute__((always_inline)) -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(uart_base, - (get_sclk() + (baud * 8)) / (baud * 16) - ANOMALY_05000230); + serial_early_do_portmux(); } #ifndef BFIN_IN_INITCODE diff --git a/arch/blackfin/cpu/serial1.h b/arch/blackfin/cpu/serial1.h new file mode 100644 index 0000000..a20175b --- /dev/null +++ b/arch/blackfin/cpu/serial1.h @@ -0,0 +1,348 @@ +/* + * serial.h - common serial defines for early debug and serial driver. + * any functions defined here must be always_inline since + * initcode cannot have function calls. + * + * Copyright (c) 2004-2011 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#ifndef __BFIN_CPU_SERIAL1_H__ +#define __BFIN_CPU_SERIAL1_H__ + +#include <asm/mach-common/bits/uart.h> + +#ifndef __ASSEMBLY__ + +#define MMR_UART(n) _PASTE_UART(n, UART, DLL) +#ifdef UART_DLL +# 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 UART_BASE MMR_UART(CONFIG_UART_CONSOLE) + +#define LOB(x) ((x) & 0xFF) +#define HIB(x) (((x) >> 8) & 0xFF) + +/* + * All Blackfin system MMRs are padded to 32bits even if the register + * itself is only 16bits. So use a helper macro to streamline this. + */ +struct bfin_mmr_serial { +#if BFIN_UART_HW_VER == 2 + u16 dll; + u16 __pad_0; + u16 dlh; + u16 __pad_1; + u16 gctl; + u16 __pad_2; + u16 lcr; + u16 __pad_3; + u16 mcr; + u16 __pad_4; + u16 lsr; + u16 __pad_5; + u16 msr; + u16 __pad_6; + u16 scr; + u16 __pad_7; + u16 ier_set; + u16 __pad_8; + u16 ier_clear; + u16 __pad_9; + u16 thr; + u16 __pad_10; + u16 rbr; + u16 __pad_11; +#else + union { + u16 dll; + u16 thr; + const u16 rbr; + }; + const u16 __spad0; + union { + u16 dlh; + u16 ier; + }; + const u16 __spad1; + const u16 iir; + u16 __pad_0; + u16 lcr; + u16 __pad_1; + u16 mcr; + u16 __pad_2; + u16 lsr; + u16 __pad_3; + u16 msr; + u16 __pad_4; + u16 scr; + u16 __pad_5; + const u32 __spad2; + u16 gctl; + u16 __pad_6; +#endif +}; + +#define uart_lsr_t uint32_t +#define _lsr_read(p) bfin_read(&p->lsr) +#define _lsr_write(p, v) bfin_write(&p->lsr, v) + +#if BFIN_UART_HW_VER == 2 +# define ACCESS_LATCH() +# define ACCESS_PORT_IER() +#else +# define ACCESS_LATCH() bfin_write_or(&pUART->lcr, DLAB) +# define ACCESS_PORT_IER() bfin_write_and(&pUART->lcr, ~DLAB) +#endif + +__attribute__((always_inline)) +static inline void serial_early_do_mach_portmux(char port, int mux_mask, + int mux_func, int port_pin) +{ + switch (port) { +#if defined(__ADSPBF54x__) + case 'B': + bfin_write_PORTB_MUX((bfin_read_PORTB_MUX() & + ~mux_mask) | mux_func); + bfin_write_PORTB_FER(bfin_read_PORTB_FER() | port_pin); + break; + case 'E': + bfin_write_PORTE_MUX((bfin_read_PORTE_MUX() & + ~mux_mask) | mux_func); + bfin_write_PORTE_FER(bfin_read_PORTE_FER() | port_pin); + break; +#endif +#if defined(__ADSPBF50x__) || defined(__ADSPBF51x__) || defined(__ADSPBF52x__) + case 'F': + bfin_write_PORTF_MUX((bfin_read_PORTF_MUX() & + ~mux_mask) | mux_func); + bfin_write_PORTF_FER(bfin_read_PORTF_FER() | port_pin); + break; + case 'G': + bfin_write_PORTG_MUX((bfin_read_PORTG_MUX() & + ~mux_mask) | mux_func); + bfin_write_PORTG_FER(bfin_read_PORTG_FER() | port_pin); + break; + case 'H': + bfin_write_PORTH_MUX((bfin_read_PORTH_MUX() & + ~mux_mask) | mux_func); + bfin_write_PORTH_FER(bfin_read_PORTH_FER() | port_pin); + break; +#endif + default: + break; + } +} + +__attribute__((always_inline)) +static inline void serial_early_do_portmux(void) +{ +#if defined(__ADSPBF50x__) + switch (CONFIG_UART_CONSOLE) { + case 0: + serial_early_do_mach_portmux('G', PORT_x_MUX_7_MASK, + PORT_x_MUX_7_FUNC_1, PG12); /* TX: G; mux 7; func 1; PG12 */ + serial_early_do_mach_portmux('G', PORT_x_MUX_7_MASK, + PORT_x_MUX_7_FUNC_1, PG13); /* RX: G; mux 7; func 1; PG13 */ + break; + case 1: + serial_early_do_mach_portmux('F', PORT_x_MUX_3_MASK, + PORT_x_MUX_3_FUNC_1, PF7); /* TX: F; mux 3; func 1; PF6 */ + serial_early_do_mach_portmux('F', PORT_x_MUX_3_MASK, + PORT_x_MUX_3_FUNC_1, PF6); /* RX: F; mux 3; func 1; PF7 */ + break; + } +#elif defined(__ADSPBF51x__) + switch (CONFIG_UART_CONSOLE) { + case 0: + serial_early_do_mach_portmux('G', PORT_x_MUX_5_MASK, + PORT_x_MUX_5_FUNC_2, PG9); /* TX: G; mux 5; func 2; PG9 */ + serial_early_do_mach_portmux('G', PORT_x_MUX_5_MASK, + PORT_x_MUX_5_FUNC_2, PG10); /* RX: G; mux 5; func 2; PG10 */ + break; + case 1: + serial_early_do_mach_portmux('H', PORT_x_MUX_3_MASK, + PORT_x_MUX_3_FUNC_2, PH7); /* TX: H; mux 3; func 2; PH6 */ + serial_early_do_mach_portmux('H', PORT_x_MUX_3_MASK, + PORT_x_MUX_3_FUNC_2, PH6); /* RX: H; mux 3; func 2; PH7 */ + break; + } +#elif defined(__ADSPBF52x__) + switch (CONFIG_UART_CONSOLE) { + case 0: + serial_early_do_mach_portmux('G', PORT_x_MUX_2_MASK, + PORT_x_MUX_2_FUNC_3, PG7); /* TX: G; mux 2; func 3; PG7 */ + serial_early_do_mach_portmux('G', PORT_x_MUX_2_MASK, + PORT_x_MUX_2_FUNC_3, PG8); /* RX: G; mux 2; func 3; PG8 */ + break; + case 1: + serial_early_do_mach_portmux('F', PORT_x_MUX_5_MASK, + PORT_x_MUX_5_FUNC_3, PF14); /* TX: F; mux 5; func 3; PF14 */ + serial_early_do_mach_portmux('F', PORT_x_MUX_5_MASK, + PORT_x_MUX_5_FUNC_3, PF15); /* RX: F; mux 5; func 3; PF15 */ + break; + } +#elif defined(__ADSPBF537__) || defined(__ADSPBF536__) || defined(__ADSPBF534__) + const uint16_t func[] = { PFDE, PFTE, }; + bfin_write_PORT_MUX(bfin_read_PORT_MUX() & ~func[CONFIG_UART_CONSOLE]); + bfin_write_PORTF_FER(bfin_read_PORTF_FER() | + (1 << P_IDENT(P_UART(RX))) | + (1 << P_IDENT(P_UART(TX)))); +#elif defined(__ADSPBF54x__) + switch (CONFIG_UART_CONSOLE) { + case 0: + serial_early_do_mach_portmux('E', PORT_x_MUX_7_MASK, + PORT_x_MUX_7_FUNC_1, PE7); /* TX: E; mux 7; func 1; PE7 */ + serial_early_do_mach_portmux('E', PORT_x_MUX_8_MASK, + PORT_x_MUX_8_FUNC_1, PE8); /* RX: E; mux 8; func 1; PE8 */ + break; + case 1: + serial_early_do_mach_portmux('H', PORT_x_MUX_0_MASK, + PORT_x_MUX_0_FUNC_1, PH0); /* TX: H; mux 0; func 1; PH0 */ + serial_early_do_mach_portmux('H', PORT_x_MUX_1_MASK, + PORT_x_MUX_1_FUNC_1, PH1); /* RX: H; mux 1; func 1; PH1 */ + break; + case 2: + serial_early_do_mach_portmux('B', PORT_x_MUX_4_MASK, + PORT_x_MUX_4_FUNC_1, PB4); /* TX: B; mux 4; func 1; PB4 */ + serial_early_do_mach_portmux('B', PORT_x_MUX_5_MASK, + PORT_x_MUX_5_FUNC_1, PB5); /* RX: B; mux 5; func 1; PB5 */ + break; + case 3: + serial_early_do_mach_portmux('B', PORT_x_MUX_6_MASK, + PORT_x_MUX_6_FUNC_1, PB6); /* TX: B; mux 6; func 1; PB6 */ + serial_early_do_mach_portmux('B', PORT_x_MUX_7_MASK, + PORT_x_MUX_7_FUNC_1, PB7); /* RX: B; mux 7; func 1; PB7 */ + break; + } +#elif defined(__ADSPBF561__) + /* UART pins could be GPIO, but they aren't pin muxed. */ +#else +# if (P_UART(RX) & P_DEFINED) || (P_UART(TX) & P_DEFINED) +# error "missing portmux logic for UART" +# endif +#endif + SSYNC(); +} + +__attribute__((always_inline)) +static inline uint32_t uart_sclk(void) +{ +#if defined(BFIN_IN_INITCODE) || defined(CONFIG_DEBUG_EARLY_SERIAL) + /* We cannot use get_sclk() early on as it uses + * caches in external memory + */ + return CONFIG_CLKIN_HZ * CONFIG_VCO_MULT / CONFIG_SCLK_DIV; +#else + return get_sclk(); +#endif +} + +__attribute__((always_inline)) +static inline int uart_init(uint32_t uart_base) +{ + /* always enable UART -- avoids anomalies 05000309 and 05000350 */ + bfin_write(&pUART->gctl, UCEN); + + /* Set LCR to Word Lengh 8-bit word select */ + bfin_write(&pUART->lcr, WLS_8); + + SSYNC(); + + return 0; +} + +__attribute__((always_inline)) +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 int serial_early_enabled(uint32_t uart_base) +{ + return bfin_read(&pUART->gctl) & UCEN; +} + +__attribute__((always_inline)) +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. + */ + uint16_t divisor = (uart_sclk() + (baud * 8)) / (baud * 16) - + ANOMALY_05000230; + + /* Set DLAB in LCR to Access DLL and DLH */ + ACCESS_LATCH(); + SSYNC(); + + /* Program the divisor to get the baud rate we want */ + bfin_write(&pUART->dll, LOB(divisor)); + bfin_write(&pUART->dlh, HIB(divisor)); + SSYNC(); + + /* Clear DLAB in LCR to Access THR RBR IER */ + ACCESS_PORT_IER(); + SSYNC(); +} + +__attribute__((always_inline)) +static inline void serial_early_put_div(uint16_t divisor) +{ + uint32_t uart_base = UART_BASE; + + /* Set DLAB in LCR to Access DLL and DLH */ + ACCESS_LATCH(); + SSYNC(); + + /* Program the divisor to get the baud rate we want */ + bfin_write(&pUART->dll, LOB(divisor)); + bfin_write(&pUART->dlh, HIB(divisor)); + SSYNC(); + + /* Clear DLAB in LCR to Access THR RBR IER */ + ACCESS_PORT_IER(); + SSYNC(); +} + +__attribute__((always_inline)) +static inline uint16_t serial_early_get_div(void) +{ + uint32_t uart_base = UART_BASE; + + /* Set DLAB in LCR to Access DLL and DLH */ + ACCESS_LATCH(); + SSYNC(); + + 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 */ + ACCESS_PORT_IER(); + SSYNC(); + + return divisor; +} + +#endif + +#endif diff --git a/arch/blackfin/cpu/serial4.h b/arch/blackfin/cpu/serial4.h new file mode 100644 index 0000000..887845c --- /dev/null +++ b/arch/blackfin/cpu/serial4.h @@ -0,0 +1,161 @@ +/* + * serial.h - common serial defines for early debug and serial driver. + * any functions defined here must be always_inline since + * initcode cannot have function calls. + * + * Copyright (c) 2004-2011 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#ifndef __BFIN_CPU_SERIAL4_H__ +#define __BFIN_CPU_SERIAL4_H__ + +#include <asm/mach-common/bits/uart4.h> + +#ifndef __ASSEMBLY__ + +#define MMR_UART(n) _PASTE_UART(n, UART, REVID) +#define UART_BASE MMR_UART(CONFIG_UART_CONSOLE) + +struct bfin_mmr_serial { + u32 revid; + u32 control; + u32 status; + u32 scr; + u32 clock; + u32 emask; + u32 emaskst; + u32 emaskcl; + u32 rbr; + u32 thr; + u32 taip; + u32 tsr; + u32 rsr; + u32 txdiv_cnt; + u32 rxdiv_cnt; +}; +#define uart_lsr_t uint32_t +#define _lsr_read(p) bfin_read(&p->status) +#define _lsr_write(p, v) bfin_write(&p->status, v) + +__attribute__((always_inline)) +static inline void serial_early_do_mach_portmux(char port, int mux_mask, + int mux_func, int port_pin) +{ + switch (port) { + case 'D': + bfin_write_PORTD_MUX((bfin_read_PORTD_MUX() & + ~mux_mask) | mux_func); + bfin_write_PORTD_FER_SET(port_pin); + break; + case 'G': + bfin_write_PORTG_MUX((bfin_read_PORTG_MUX() & + ~mux_mask) | mux_func); + bfin_write_PORTG_FER_SET(port_pin); + break; + } +} + +__attribute__((always_inline)) +static inline void serial_early_do_portmux(void) +{ +#if defined(__ADSPBF60x__) + switch (CONFIG_UART_CONSOLE) { + case 0: + serial_early_do_mach_portmux('D', PORT_x_MUX_7_MASK, + PORT_x_MUX_7_FUNC_2, PD7); /* TX: D; mux 7; func 2; PD7 */ + serial_early_do_mach_portmux('D', PORT_x_MUX_8_MASK, + PORT_x_MUX_8_FUNC_2, PD8); /* RX: D; mux 8; func 2; PD8 */ + break; + case 1: + serial_early_do_mach_portmux('G', PORT_x_MUX_15_MASK, + PORT_x_MUX_15_FUNC_1, PG15); /* TX: G; mux 15; func 1; PG15 */ + serial_early_do_mach_portmux('G', PORT_x_MUX_14_MASK, + PORT_x_MUX_14_FUNC_1, PG14); /* RX: G; mux 14; func 1; PG14 */ + break; + } +#else +# if (P_UART(RX) & P_DEFINED) || (P_UART(TX) & P_DEFINED) +# error "missing portmux logic for UART" +# endif +#endif + SSYNC(); +} + +__attribute__((always_inline)) +static inline uint32_t uart_sclk(void) +{ +#if defined(BFIN_IN_INITCODE) || defined(CONFIG_DEBUG_EARLY_SERIAL) + /* We cannot use get_sclk() early on as it uses caches in + * external memory + */ + return CONFIG_CLKIN_HZ * CONFIG_VCO_MULT / CONFIG_SCLK_DIV / + CONFIG_SCLK0_DIV; +#else + return get_sclk0(); +#endif +} + +__attribute__((always_inline)) +static inline int uart_init(uint32_t uart_base) +{ + /* always enable UART to 8-bit mode */ + bfin_write(&pUART->control, UEN | UMOD_UART | WLS_8); + + SSYNC(); + + return 0; +} + +__attribute__((always_inline)) +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 UEN */ + bfin_write(&pUART->control, 0); + + return 0; +} + +__attribute__((always_inline)) +static inline int serial_early_enabled(uint32_t uart_base) +{ + return bfin_read(&pUART->control) & UEN; +} + +__attribute__((always_inline)) +static inline void serial_early_set_baud(uint32_t uart_base, uint32_t baud) +{ + uint32_t divisor = uart_sclk() / (baud * 16); + + /* Program the divisor to get the baud rate we want */ + bfin_write(&pUART->clock, divisor); + SSYNC(); +} + +__attribute__((always_inline)) +static inline void serial_early_put_div(uint32_t divisor) +{ + uint32_t uart_base = UART_BASE; + bfin_write(&pUART->clock, divisor); +} + +__attribute__((always_inline)) +static inline uint32_t serial_early_get_div(void) +{ + uint32_t uart_base = UART_BASE; + return bfin_read(&pUART->clock); +} + +#endif + +#endif |