diff options
Diffstat (limited to 'arch/powerpc/cpu/ppc4xx')
| -rw-r--r-- | arch/powerpc/cpu/ppc4xx/4xx_uart.c | 821 |
1 files changed, 123 insertions, 698 deletions
diff --git a/arch/powerpc/cpu/ppc4xx/4xx_uart.c b/arch/powerpc/cpu/ppc4xx/4xx_uart.c index 5eaeefe8ea..2660aa84d6 100644 --- a/arch/powerpc/cpu/ppc4xx/4xx_uart.c +++ b/arch/powerpc/cpu/ppc4xx/4xx_uart.c @@ -2,6 +2,9 @@ * (C) Copyright 2000-2006 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * + * (C) Copyright 2010 + * Stefan Roese, DENX Software Engineering, sr@denx.de. + * * See file CREDITS for list of people who contributed to this * project. * @@ -51,14 +54,6 @@ #include <watchdog.h> #include <asm/ppc4xx.h> -#ifdef CONFIG_SERIAL_MULTI -#include <serial.h> -#endif - -#ifdef CONFIG_SERIAL_SOFTWARE_FIFO -#include <malloc.h> -#endif - DECLARE_GLOBAL_DATA_PTR; #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || \ @@ -66,24 +61,6 @@ DECLARE_GLOBAL_DATA_PTR; defined(CONFIG_405EX) || defined(CONFIG_440) #if defined(CONFIG_440) -#if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \ - defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \ - defined(CONFIG_460EX) || defined(CONFIG_460GT) -#define UART0_BASE (CONFIG_SYS_PERIPHERAL_BASE + 0x00000300) -#define UART1_BASE (CONFIG_SYS_PERIPHERAL_BASE + 0x00000400) -#else -#define UART0_BASE (CONFIG_SYS_PERIPHERAL_BASE + 0x00000200) -#define UART1_BASE (CONFIG_SYS_PERIPHERAL_BASE + 0x00000300) -#endif - -#if defined(CONFIG_440SP) || defined(CONFIG_440SPE) -#define UART2_BASE (CONFIG_SYS_PERIPHERAL_BASE + 0x00000600) -#endif - -#if defined(CONFIG_460EX) || defined(CONFIG_460GT) -#define UART2_BASE (CONFIG_SYS_PERIPHERAL_BASE + 0x00000500) -#define UART3_BASE (CONFIG_SYS_PERIPHERAL_BASE + 0x00000600) -#endif #if defined(CONFIG_440GP) #define CR0_MASK 0x3fff0000 @@ -116,16 +93,14 @@ DECLARE_GLOBAL_DATA_PTR; #define MTREG(a, d) mtsdr(a, d) #endif /* #if defined(CONFIG_440GP) */ #elif defined(CONFIG_405EP) || defined(CONFIG_405EZ) -#define UART0_BASE 0xef600300 -#define UART1_BASE 0xef600400 #define UCR0_MASK 0x0000007f #define UCR1_MASK 0x00007f00 #define UCR0_UDIV_POS 0 #define UCR1_UDIV_POS 8 #define UDIV_MAX 127 #elif defined(CONFIG_405EX) -#define UART0_BASE 0xef600200 -#define UART1_BASE 0xef600300 +#define MFREG(a, d) mfsdr(a, d) +#define MTREG(a, d) mtsdr(a, d) #define CR0_MASK 0x000000ff #define CR0_EXTCLK_ENA 0x00800000 #define CR0_UDIV_POS 0 @@ -133,748 +108,198 @@ DECLARE_GLOBAL_DATA_PTR; #define UART0_SDR SDR0_UART0 #define UART1_SDR SDR0_UART1 #else /* CONFIG_405GP || CONFIG_405CR */ -#define UART0_BASE 0xef600300 -#define UART1_BASE 0xef600400 #define CR0_MASK 0x00001fff #define CR0_EXTCLK_ENA 0x000000c0 #define CR0_UDIV_POS 1 #define UDIV_MAX 32 #endif -/* using serial port 0 or 1 as U-Boot console ? */ -#if defined(CONFIG_UART1_CONSOLE) -#define ACTING_UART0_BASE UART1_BASE -#define ACTING_UART1_BASE UART0_BASE -#else -#define ACTING_UART0_BASE UART0_BASE -#define ACTING_UART1_BASE UART1_BASE -#endif - #if defined(CONFIG_405EP) && defined(CONFIG_SYS_EXT_SERIAL_CLOCK) #error "External serial clock not supported on AMCC PPC405EP!" #endif -#define UART_RBR 0x00 -#define UART_THR 0x00 -#define UART_IER 0x01 -#define UART_IIR 0x02 -#define UART_FCR 0x02 -#define UART_LCR 0x03 -#define UART_MCR 0x04 -#define UART_LSR 0x05 -#define UART_MSR 0x06 -#define UART_SCR 0x07 -#define UART_DLL 0x00 -#define UART_DLM 0x01 - -/*-----------------------------------------------------------------------------+ - | Line Status Register. - +-----------------------------------------------------------------------------*/ -#define asyncLSRDataReady1 0x01 -#define asyncLSROverrunError1 0x02 -#define asyncLSRParityError1 0x04 -#define asyncLSRFramingError1 0x08 -#define asyncLSRBreakInterrupt1 0x10 -#define asyncLSRTxHoldEmpty1 0x20 -#define asyncLSRTxShiftEmpty1 0x40 -#define asyncLSRRxFifoError1 0x80 - -#ifdef CONFIG_SERIAL_SOFTWARE_FIFO -/*-----------------------------------------------------------------------------+ - | Fifo - +-----------------------------------------------------------------------------*/ -typedef struct { - char *rx_buffer; - ulong rx_put; - ulong rx_get; -} serial_buffer_t; - -volatile static serial_buffer_t buf_info; -#endif - -static void serial_init_common(u32 base, u32 udiv, u16 bdiv) -{ - PPC4xx_SYS_INFO sys_info; - u8 val; - - get_sys_info(&sys_info); - - /* Correct UART frequency in bd-info struct now that - * the UART divisor is available - */ -#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK - gd->uart_clk = CONFIG_SYS_EXT_SERIAL_CLOCK; -#else - gd->uart_clk = sys_info.freqUART / udiv; -#endif - - out_8((u8 *)base + UART_LCR, 0x80); /* set DLAB bit */ - out_8((u8 *)base + UART_DLL, bdiv); /* set baudrate divisor */ - out_8((u8 *)base + UART_DLM, bdiv >> 8); /* set baudrate divisor */ - out_8((u8 *)base + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */ - out_8((u8 *)base + UART_FCR, 0x00); /* disable FIFO */ - out_8((u8 *)base + UART_MCR, 0x00); /* no modem control DTR RTS */ - val = in_8((u8 *)base + UART_LSR); /* clear line status */ - val = in_8((u8 *)base + UART_RBR); /* read receive buffer */ - out_8((u8 *)base + UART_SCR, 0x00); /* set scratchpad */ - out_8((u8 *)base + UART_IER, 0x00); /* set interrupt enable reg */ -} - -#if (defined(CONFIG_440) || defined(CONFIG_405EX)) && \ - !defined(CONFIG_SYS_EXT_SERIAL_CLOCK) -static void serial_divs (int baudrate, unsigned long *pudiv, - unsigned short *pbdiv) +#if (defined(CONFIG_405EX) || defined(CONFIG_405EZ) || \ + defined(CONFIG_440)) && !defined(CONFIG_SYS_EXT_SERIAL_CLOCK) +/* + * For some SoC's, the cpu clock is on divider chain A, UART on + * divider chain B ... so cpu clock is irrelevant. Get the + * "optimized" values that are subject to the 1/2 opb clock + * constraint. + */ +static u16 serial_bdiv(int baudrate, u32 *udiv) { sys_info_t sysinfo; - unsigned long div; /* total divisor udiv * bdiv */ - unsigned long umin; /* minimum udiv */ - unsigned short diff; /* smallest diff */ - unsigned long udiv; /* best udiv */ - unsigned short idiff; /* current diff */ - unsigned short ibdiv; /* current bdiv */ - unsigned long i; - unsigned long est; /* current estimate */ + u32 div; /* total divisor udiv * bdiv */ + u32 umin; /* minimum udiv */ + u16 diff; /* smallest diff */ + u16 idiff; /* current diff */ + u16 ibdiv; /* current bdiv */ + u32 i; + u32 est; /* current estimate */ + u32 max; +#if defined(CONFIG_405EZ) + u32 cpr_pllc; + u32 plloutb; + u32 reg; +#endif get_sys_info(&sysinfo); - udiv = 32; /* Assume lowest possible serial clk */ - div = sysinfo.freqPLB / (16 * baudrate); /* total divisor */ - umin = sysinfo.pllOpbDiv << 1; /* 2 x OPB divisor */ - diff = 32; /* highest possible */ - - /* i is the test udiv value -- start with the largest - * possible (32) to minimize serial clock and constrain - * search to umin. - */ - for (i = 32; i > umin; i--) { - ibdiv = div / i; - est = i * ibdiv; - idiff = (est > div) ? (est-div) : (div-est); - if (idiff == 0) { - udiv = i; - break; /* can't do better */ - } else if (idiff < diff) { - udiv = i; /* best so far */ - diff = idiff; /* update lowest diff*/ - } - } - - *pudiv = udiv; - *pbdiv = div / udiv; -} - -#elif defined(CONFIG_405EZ) - -static void serial_divs (int baudrate, unsigned long *pudiv, - unsigned short *pbdiv) -{ - sys_info_t sysinfo; - unsigned long div; /* total divisor udiv * bdiv */ - unsigned long umin; /* minimum udiv */ - unsigned short diff; /* smallest diff */ - unsigned long udiv; /* best udiv */ - unsigned short idiff; /* current diff */ - unsigned short ibdiv; /* current bdiv */ - unsigned long i; - unsigned long est; /* current estimate */ - unsigned long plloutb; - unsigned long cpr_pllc; - u32 reg; - +#if defined(CONFIG_405EZ) /* check the pll feedback source */ mfcpr(CPR0_PLLC, cpr_pllc); - - get_sys_info(&sysinfo); - plloutb = ((CONFIG_SYS_CLK_FREQ * ((cpr_pllc & PLLC_SRC_MASK) ? sysinfo.pllFwdDivB : sysinfo.pllFwdDiv) * sysinfo.pllFbkDiv) / sysinfo.pllFwdDivB); - udiv = 256; /* Assume lowest possible serial clk */ div = plloutb / (16 * baudrate); /* total divisor */ umin = (plloutb / get_OPB_freq()) << 1; /* 2 x OPB divisor */ - diff = 256; /* highest possible */ + max = 256; /* highest possible */ +#else /* 405EZ */ + div = sysinfo.freqPLB / (16 * baudrate); /* total divisor */ + umin = sysinfo.pllOpbDiv << 1; /* 2 x OPB divisor */ + max = 32; /* highest possible */ +#endif /* 405EZ */ + + *udiv = diff = max; - /* i is the test udiv value -- start with the largest - * possible (256) to minimize serial clock and constrain + /* + * i is the test udiv value -- start with the largest + * possible (max) to minimize serial clock and constrain * search to umin. */ - for (i = 256; i > umin; i--) { + for (i = max; i > umin; i--) { ibdiv = div / i; est = i * ibdiv; - idiff = (est > div) ? (est-div) : (div-est); + idiff = (est > div) ? (est - div) : (div - est); if (idiff == 0) { - udiv = i; - break; /* can't do better */ + *udiv = i; + break; /* can't do better */ } else if (idiff < diff) { - udiv = i; /* best so far */ - diff = idiff; /* update lowest diff*/ + *udiv = i; /* best so far */ + diff = idiff; /* update lowest diff*/ } } - *pudiv = udiv; +#if defined(CONFIG_405EZ) mfcpr(CPR0_PERD0, reg); reg &= ~0x0000ffff; - reg |= ((udiv - 0) << 8) | (udiv - 0); + reg |= ((*udiv - 0) << 8) | (*udiv - 0); mtcpr(CPR0_PERD0, reg); - *pbdiv = div / udiv; +#endif + + return div / *udiv; } -#endif /* defined(CONFIG_440) && !defined(CONFIG_SYS_EXT_SERIAL_CLK) */ +#endif /* #if (defined(CONFIG_405EP) ... */ /* - * Minimal serial functions needed to use one of the SMC ports - * as serial console interface. + * This function returns the UART clock used by the common + * NS16550 driver. Additionally the SoC internal divisors for + * optimal UART baudrate are configured. */ - -#if defined(CONFIG_440) -int serial_init_dev(unsigned long base) +int get_serial_clock(void) { - unsigned long reg; - unsigned long udiv; - unsigned short bdiv; -#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK - unsigned long tmp; -#endif - - MFREG(UART0_SDR, reg); - reg &= ~CR0_MASK; - -#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK - reg |= CR0_EXTCLK_ENA; - udiv = 1; - tmp = gd->baudrate * 16; - bdiv = (CONFIG_SYS_EXT_SERIAL_CLOCK + tmp / 2) / tmp; -#else - /* For 440, the cpu clock is on divider chain A, UART on divider - * chain B ... so cpu clock is irrelevant. Get the "optimized" - * values that are subject to the 1/2 opb clock constraint - */ - serial_divs (gd->baudrate, &udiv, &bdiv); + u32 clk; + u32 udiv; +#if defined(CONFIG_405CR) || defined(CONFIG_405EP) || defined(CONFIG_405GP) + u32 tmp; #endif - - reg |= (udiv - UDIV_SUBTRACT) << CR0_UDIV_POS; /* set the UART divisor */ - - /* - * Configure input clock to baudrate generator for all - * available serial ports here - */ - MTREG(UART0_SDR, reg); -#if defined(UART1_SDR) - MTREG(UART1_SDR, reg); -#endif -#if defined(UART2_SDR) - MTREG(UART2_SDR, reg); -#endif -#if defined(UART3_SDR) - MTREG(UART3_SDR, reg); +#if !defined(CONFIG_405EZ) + u32 reg; #endif - - serial_init_common(base, udiv, bdiv); - - return (0); -} - -#else /* !defined(CONFIG_440) */ - -int serial_init_dev (unsigned long base) -{ - unsigned long reg; - unsigned long tmp; - unsigned long clk; - unsigned long udiv; - unsigned short bdiv; - -#ifdef CONFIG_405EX - clk = tmp = 0; - mfsdr(UART0_SDR, reg); - reg &= ~CR0_MASK; -#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK - reg |= CR0_EXTCLK_ENA; - udiv = 1; - tmp = gd->baudrate * 16; - bdiv = (CONFIG_SYS_EXT_SERIAL_CLOCK + tmp / 2) / tmp; -#else - serial_divs(gd->baudrate, &udiv, &bdiv); +#if !defined(CONFIG_SYS_EXT_SERIAL_CLOCK) + PPC4xx_SYS_INFO sys_info; #endif - reg |= (udiv - UDIV_SUBTRACT) << CR0_UDIV_POS; /* set the UART divisor */ /* - * Configure input clock to baudrate generator for all - * available serial ports here + * Programming of the internal divisors is SoC specific. + * Let's handle this in some #ifdef's for the SoC's. */ - mtsdr(UART0_SDR, reg); - -#if defined(UART1_SDR) - mtsdr(UART1_SDR, reg); -#endif -#elif defined(CONFIG_405EZ) - serial_divs(gd->baudrate, &udiv, &bdiv); - clk = tmp = reg = 0; -#else -#ifdef CONFIG_405EP - reg = mfdcr(CPC0_UCR) & ~(UCR0_MASK | UCR1_MASK); - clk = gd->cpu_clk; - tmp = CONFIG_SYS_BASE_BAUD * 16; - udiv = (clk + tmp / 2) / tmp; - if (udiv > UDIV_MAX) /* max. n bits for udiv */ - udiv = UDIV_MAX; - reg |= (udiv) << UCR0_UDIV_POS; /* set the UART divisor */ - reg |= (udiv) << UCR1_UDIV_POS; /* set the UART divisor */ - mtdcr (CPC0_UCR, reg); -#else /* CONFIG_405EP */ +#if defined(CONFIG_405CR) || defined(CONFIG_405GP) + tmp = 0; reg = mfdcr(CPC0_CR0) & ~CR0_MASK; #ifdef CONFIG_SYS_EXT_SERIAL_CLOCK clk = CONFIG_SYS_EXT_SERIAL_CLOCK; udiv = 1; reg |= CR0_EXTCLK_ENA; -#else +#else /* CONFIG_SYS_EXT_SERIAL_CLOCK */ clk = gd->cpu_clk; #ifdef CONFIG_SYS_405_UART_ERRATA_59 udiv = 31; /* Errata 59: stuck at 31 */ -#else +#else /* CONFIG_SYS_405_UART_ERRATA_59 */ tmp = CONFIG_SYS_BASE_BAUD * 16; udiv = (clk + tmp / 2) / tmp; if (udiv > UDIV_MAX) /* max. n bits for udiv */ udiv = UDIV_MAX; -#endif -#endif +#endif /* CONFIG_SYS_405_UART_ERRATA_59 */ +#endif /* CONFIG_SYS_EXT_SERIAL_CLOCK */ reg |= (udiv - 1) << CR0_UDIV_POS; /* set the UART divisor */ mtdcr (CPC0_CR0, reg); -#endif /* CONFIG_405EP */ - tmp = gd->baudrate * udiv * 16; - bdiv = (clk + tmp / 2) / tmp; -#endif /* CONFIG_405EX */ - - serial_init_common(base, udiv, bdiv); - - return (0); -} - -#endif /* if defined(CONFIG_440) */ - -void serial_setbrg_dev(unsigned long base) -{ - serial_init_dev(base); -} - -void serial_putc_dev(unsigned long base, const char c) -{ - int i; - - if (c == '\n') - serial_putc_dev(base, '\r'); - - /* check THRE bit, wait for transmiter available */ - for (i = 1; i < 3500; i++) { - if ((in_8((u8 *)base + UART_LSR) & 0x20) == 0x20) - break; - udelay (100); - } - - out_8((u8 *)base + UART_THR, c); /* put character out */ -} - -void serial_puts_dev (unsigned long base, const char *s) -{ - while (*s) - serial_putc_dev (base, *s++); -} - -int serial_getc_dev (unsigned long base) -{ - unsigned char status = 0; - - while (1) { -#if defined(CONFIG_HW_WATCHDOG) - WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ -#endif /* CONFIG_HW_WATCHDOG */ - - status = in_8((u8 *)base + UART_LSR); - if ((status & asyncLSRDataReady1) != 0x0) - break; - - if ((status & ( asyncLSRFramingError1 | - asyncLSROverrunError1 | - asyncLSRParityError1 | - asyncLSRBreakInterrupt1 )) != 0) { - out_8((u8 *)base + UART_LSR, - asyncLSRFramingError1 | - asyncLSROverrunError1 | - asyncLSRParityError1 | - asyncLSRBreakInterrupt1); - } - } - - return (0x000000ff & (int) in_8((u8 *)base)); -} - -int serial_tstc_dev (unsigned long base) -{ - unsigned char status; - - status = in_8((u8 *)base + UART_LSR); - if ((status & asyncLSRDataReady1) != 0x0) - return (1); - - if ((status & ( asyncLSRFramingError1 | - asyncLSROverrunError1 | - asyncLSRParityError1 | - asyncLSRBreakInterrupt1 )) != 0) { - out_8((u8 *)base + UART_LSR, - asyncLSRFramingError1 | - asyncLSROverrunError1 | - asyncLSRParityError1 | - asyncLSRBreakInterrupt1); - } - - return 0; -} - -#ifdef CONFIG_SERIAL_SOFTWARE_FIFO - -void serial_isr (void *arg) -{ - int space; - int c; - const int rx_get = buf_info.rx_get; - int rx_put = buf_info.rx_put; - - if (rx_get <= rx_put) - space = CONFIG_SERIAL_SOFTWARE_FIFO - (rx_put - rx_get); - else - space = rx_get - rx_put; - - while (serial_tstc_dev (ACTING_UART0_BASE)) { - c = serial_getc_dev (ACTING_UART0_BASE); - if (space) { - buf_info.rx_buffer[rx_put++] = c; - space--; - } - if (rx_put == CONFIG_SERIAL_SOFTWARE_FIFO) - rx_put = 0; - if (space < CONFIG_SERIAL_SOFTWARE_FIFO / 4) { - /* Stop flow by setting RTS inactive */ - out_8((u8 *)ACTING_UART0_BASE + UART_MCR, - in_8((u8 *)ACTING_UART0_BASE + UART_MCR) & - (0xFF ^ 0x02)); - } - } - buf_info.rx_put = rx_put; -} - -void serial_buffered_init (void) -{ - serial_puts ("Switching to interrupt driven serial input mode.\n"); - buf_info.rx_buffer = malloc (CONFIG_SERIAL_SOFTWARE_FIFO); - buf_info.rx_put = 0; - buf_info.rx_get = 0; - - if (in_8((u8 *)ACTING_UART0_BASE + UART_MSR) & 0x10) - serial_puts ("Check CTS signal present on serial port: OK.\n"); - else - serial_puts ("WARNING: CTS signal not present on serial port.\n"); - - irq_install_handler ( VECNUM_U0 /*UART0 */ /*int vec */ , - serial_isr /*interrupt_handler_t *handler */ , - (void *) &buf_info /*void *arg */ ); - - /* Enable "RX Data Available" Interrupt on UART */ - out_8(ACTING_UART0_BASE + UART_IER, 0x01); - /* Set DTR active */ - out_8(ACTING_UART0_BASE + UART_MCR, - in_8((u8 *)ACTING_UART0_BASE + UART_MCR) | 0x01); - /* Start flow by setting RTS active */ - out_8(ACTING_UART0_BASE + UART_MCR, - in_8((u8 *)ACTING_UART0_BASE + UART_MCR) | 0x02); - /* Setup UART FIFO: RX trigger level: 4 byte, Enable FIFO */ - out_8(ACTING_UART0_BASE + UART_FCR, (1 << 6) | 1); -} - -void serial_buffered_putc (const char c) -{ - /* Wait for CTS */ -#if defined(CONFIG_HW_WATCHDOG) - while (!(in_8((u8 *)ACTING_UART0_BASE + UART_MSR) & 0x10)) - WATCHDOG_RESET (); -#else - while (!(in_8((u8 *)ACTING_UART0_BASE + UART_MSR) & 0x10)); -#endif - serial_putc (c); -} - -void serial_buffered_puts (const char *s) -{ - serial_puts (s); -} - -int serial_buffered_getc (void) -{ - int space; - int c; - int rx_get = buf_info.rx_get; - int rx_put; - -#if defined(CONFIG_HW_WATCHDOG) - while (rx_get == buf_info.rx_put) - WATCHDOG_RESET (); +#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK + clk = CONFIG_SYS_EXT_SERIAL_CLOCK; #else - while (rx_get == buf_info.rx_put); + clk = CONFIG_SYS_BASE_BAUD * 16; #endif - c = buf_info.rx_buffer[rx_get++]; - if (rx_get == CONFIG_SERIAL_SOFTWARE_FIFO) - rx_get = 0; - buf_info.rx_get = rx_get; - - rx_put = buf_info.rx_put; - if (rx_get <= rx_put) - space = CONFIG_SERIAL_SOFTWARE_FIFO - (rx_put - rx_get); - else - space = rx_get - rx_put; - - if (space > CONFIG_SERIAL_SOFTWARE_FIFO / 2) { - /* Start flow by setting RTS active */ - out_8(ACTING_UART0_BASE + UART_MCR, - in_8((u8 *)ACTING_UART0_BASE + UART_MCR) | 0x02); - } +#endif /* CONFIG_405CR */ - return c; -} +#if defined(CONFIG_405EP) + reg = mfdcr(CPC0_UCR) & ~(UCR0_MASK | UCR1_MASK); + clk = gd->cpu_clk; + tmp = CONFIG_SYS_BASE_BAUD * 16; + udiv = (clk + tmp / 2) / tmp; + if (udiv > UDIV_MAX) /* max. n bits for udiv */ + udiv = UDIV_MAX; + reg |= udiv << UCR0_UDIV_POS; /* set the UART divisor */ + reg |= udiv << UCR1_UDIV_POS; /* set the UART divisor */ + mtdcr(CPC0_UCR, reg); + clk = CONFIG_SYS_BASE_BAUD * 16; +#endif /* CONFIG_405EP */ -int serial_buffered_tstc (void) -{ - return (buf_info.rx_get != buf_info.rx_put) ? 1 : 0; -} +#if defined(CONFIG_405EX) || defined(CONFIG_440) + MFREG(UART0_SDR, reg); + reg &= ~CR0_MASK; -#endif /* CONFIG_SERIAL_SOFTWARE_FIFO */ +#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK + reg |= CR0_EXTCLK_ENA; + udiv = 1; + clk = CONFIG_SYS_EXT_SERIAL_CLOCK; +#else /* CONFIG_SYS_EXT_SERIAL_CLOCK */ + clk = gd->baudrate * serial_bdiv(gd->baudrate, &udiv) * 16; +#endif /* CONFIG_SYS_EXT_SERIAL_CLOCK */ -#if defined(CONFIG_CMD_KGDB) -/* - AS HARNOIS : according to CONFIG_KGDB_SER_INDEX kgdb uses serial port - number 0 or number 1 - - if CONFIG_KGDB_SER_INDEX = 1 => serial port number 0 : - configuration has been already done - - if CONFIG_KGDB_SER_INDEX = 2 => serial port number 1 : - configure port 1 for serial I/O with rate = CONFIG_KGDB_BAUDRATE -*/ -#if (CONFIG_KGDB_SER_INDEX & 2) -void kgdb_serial_init (void) -{ - u8 val; - u16 br_reg; + reg |= (udiv - UDIV_SUBTRACT) << CR0_UDIV_POS; /* set the UART divisor */ - get_clocks (); - br_reg = (((((gd->cpu_clk / 16) / 18) * 10) / CONFIG_KGDB_BAUDRATE) + - 5) / 10; /* - * Init onboard 16550 UART + * Configure input clock to baudrate generator for all + * available serial ports here */ - out_8((u8 *)ACTING_UART1_BASE + UART_LCR, 0x80); /* set DLAB bit */ - out_8((u8 *)ACTING_UART1_BASE + UART_DLL, (br_reg & 0x00ff)); /* set divisor for 9600 baud */ - out_8((u8 *)ACTING_UART1_BASE + UART_DLM, ((br_reg & 0xff00) >> 8)); /* set divisor for 9600 baud */ - out_8((u8 *)ACTING_UART1_BASE + UART_LCR, 0x03); /* line control 8 bits no parity */ - out_8((u8 *)ACTING_UART1_BASE + UART_FCR, 0x00); /* disable FIFO */ - out_8((u8 *)ACTING_UART1_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */ - val = in_8((u8 *)ACTING_UART1_BASE + UART_LSR); /* clear line status */ - val = in_8((u8 *)ACTING_UART1_BASE + UART_RBR); /* read receive buffer */ - out_8((u8 *)ACTING_UART1_BASE + UART_SCR, 0x00); /* set scratchpad */ - out_8((u8 *)ACTING_UART1_BASE + UART_IER, 0x00); /* set interrupt enable reg */ -} - -void putDebugChar (const char c) -{ - if (c == '\n') - serial_putc ('\r'); - - out_8((u8 *)ACTING_UART1_BASE + UART_THR, c); /* put character out */ - - /* check THRE bit, wait for transfer done */ - while ((in_8((u8 *)ACTING_UART1_BASE + UART_LSR) & 0x20) != 0x20); -} - -void putDebugStr (const char *s) -{ - while (*s) - serial_putc (*s++); -} - -int getDebugChar (void) -{ - unsigned char status = 0; - - while (1) { - status = in_8((u8 *)ACTING_UART1_BASE + UART_LSR); - if ((status & asyncLSRDataReady1) != 0x0) - break; - - if ((status & (asyncLSRFramingError1 | - asyncLSROverrunError1 | - asyncLSRParityError1 | - asyncLSRBreakInterrupt1 )) != 0) { - out_8((u8 *)ACTING_UART1_BASE + UART_LSR, - asyncLSRFramingError1 | - asyncLSROverrunError1 | - asyncLSRParityError1 | - asyncLSRBreakInterrupt1); - } - } - - return (0x000000ff & (int) in_8((u8 *)ACTING_UART1_BASE)); -} - -void kgdb_interruptible (int yes) -{ - return; -} - -#else /* ! (CONFIG_KGDB_SER_INDEX & 2) */ - -void kgdb_serial_init (void) -{ - serial_printf ("[on serial] "); -} - -void putDebugChar (int c) -{ - serial_putc (c); -} - -void putDebugStr (const char *str) -{ - serial_puts (str); -} - -int getDebugChar (void) -{ - return serial_getc (); -} - -void kgdb_interruptible (int yes) -{ - return; -} -#endif /* (CONFIG_KGDB_SER_INDEX & 2) */ + MTREG(UART0_SDR, reg); +#if defined(UART1_SDR) + MTREG(UART1_SDR, reg); #endif +#if defined(UART2_SDR) + MTREG(UART2_SDR, reg); +#endif +#if defined(UART3_SDR) + MTREG(UART3_SDR, reg); +#endif +#endif /* CONFIG_405EX ... */ +#if defined(CONFIG_405EZ) + clk = gd->baudrate * serial_bdiv(gd->baudrate, &udiv) * 16; +#endif /* CONFIG_405EZ */ -#if defined(CONFIG_SERIAL_MULTI) -int serial0_init(void) -{ - return (serial_init_dev(UART0_BASE)); -} - -int serial1_init(void) -{ - return (serial_init_dev(UART1_BASE)); -} - -void serial0_setbrg (void) -{ - serial_setbrg_dev(UART0_BASE); -} - -void serial1_setbrg (void) -{ - serial_setbrg_dev(UART1_BASE); -} - -void serial0_putc(const char c) -{ - serial_putc_dev(UART0_BASE,c); -} - -void serial1_putc(const char c) -{ - serial_putc_dev(UART1_BASE, c); -} - -void serial0_puts(const char *s) -{ - serial_puts_dev(UART0_BASE, s); -} - -void serial1_puts(const char *s) -{ - serial_puts_dev(UART1_BASE, s); -} - -int serial0_getc(void) -{ - return(serial_getc_dev(UART0_BASE)); -} - -int serial1_getc(void) -{ - return(serial_getc_dev(UART1_BASE)); -} - -int serial0_tstc(void) -{ - return (serial_tstc_dev(UART0_BASE)); -} - -int serial1_tstc(void) -{ - return (serial_tstc_dev(UART1_BASE)); -} - -struct serial_device serial0_device = -{ - "serial0", - "UART0", - serial0_init, - NULL, - serial0_setbrg, - serial0_getc, - serial0_tstc, - serial0_putc, - serial0_puts, -}; - -struct serial_device serial1_device = -{ - "serial1", - "UART1", - serial1_init, - NULL, - serial1_setbrg, - serial1_getc, - serial1_tstc, - serial1_putc, - serial1_puts, -}; + /* + * Correct UART frequency in bd-info struct now that + * the UART divisor is available + */ +#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK + gd->uart_clk = CONFIG_SYS_EXT_SERIAL_CLOCK; #else -/* - * Wrapper functions - */ -int serial_init(void) -{ - return serial_init_dev(ACTING_UART0_BASE); -} - -void serial_setbrg(void) -{ - serial_setbrg_dev(ACTING_UART0_BASE); -} - -void serial_putc(const char c) -{ - serial_putc_dev(ACTING_UART0_BASE, c); -} - -void serial_puts(const char *s) -{ - serial_puts_dev(ACTING_UART0_BASE, s); -} - -int serial_getc(void) -{ - return serial_getc_dev(ACTING_UART0_BASE); -} + get_sys_info(&sys_info); + gd->uart_clk = sys_info.freqUART / udiv; +#endif -int serial_tstc(void) -{ - return serial_tstc_dev(ACTING_UART0_BASE); + return clk; } -#endif /* CONFIG_SERIAL_MULTI */ - #endif /* CONFIG_405GP || CONFIG_405CR */ |
