diff options
Diffstat (limited to 'cpu/ppc4xx/serial.c')
| -rw-r--r-- | cpu/ppc4xx/serial.c | 263 |
1 files changed, 83 insertions, 180 deletions
diff --git a/cpu/ppc4xx/serial.c b/cpu/ppc4xx/serial.c index ad3ca6e..fab0d95 100644 --- a/cpu/ppc4xx/serial.c +++ b/cpu/ppc4xx/serial.c @@ -264,10 +264,12 @@ int serial_tstc () #endif /* CONFIG_IOP480 */ /*****************************************************************************/ -#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) || defined(CONFIG_405EP) +#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_405EP) || \ + defined(CONFIG_440) #if defined(CONFIG_440) -#if defined(CONFIG_440EP) || defined(CONFIG_440GR) +#if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \ + defined(CONFIG_440EPX) || defined(CONFIG_440GRX) #define UART0_BASE CFG_PERIPHERAL_BASE + 0x00000300 #define UART1_BASE CFG_PERIPHERAL_BASE + 0x00000400 #else @@ -279,15 +281,34 @@ int serial_tstc () #define UART2_BASE CFG_PERIPHERAL_BASE + 0x00000600 #endif -#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || defined(CONFIG_440GR) || defined(CONFIG_440SP) || defined(CONFIG_440SPE) -#define CR0_MASK 0xdfffffff -#define CR0_EXTCLK_ENA 0x00800000 -#define CR0_UDIV_POS 0 -#else +#if defined(CONFIG_440GP) #define CR0_MASK 0x3fff0000 #define CR0_EXTCLK_ENA 0x00600000 #define CR0_UDIV_POS 16 -#endif /* CONFIG_440GX */ +#define UDIV_SUBTRACT 1 +#define UART0_SDR cntrl0 +#define MFREG(a, d) d = mfdcr(a) +#define MTREG(a, d) mtdcr(a, d) +#else /* #if defined(CONFIG_440GP) */ +/* all other 440 PPC's access clock divider via sdr register */ +#define CR0_MASK 0xdfffffff +#define CR0_EXTCLK_ENA 0x00800000 +#define CR0_UDIV_POS 0 +#define UDIV_SUBTRACT 0 +#define UART0_SDR sdr_uart0 +#define UART1_SDR sdr_uart1 +#if defined(CONFIG_440EP) || defined(CONFIG_440EPx) || \ + defined(CONFIG_440GR) || defined(CONFIG_440GRx) || \ + defined(CONFIG_440SP) || defined(CONFIG_440SPe) +#define UART2_SDR sdr_uart2 +#endif +#if defined(CONFIG_440EP) || defined(CONFIG_440EPx) || \ + defined(CONFIG_440GR) || defined(CONFIG_440GRx) +#define UART3_SDR sdr_uart3 +#endif +#define MFREG(a, d) mfsdr(a, d) +#define MTREG(a, d) mtsdr(a, d) +#endif /* #if defined(CONFIG_440GP) */ #elif defined(CONFIG_405EP) #define UART0_BASE 0xef600300 #define UART1_BASE 0xef600400 @@ -309,21 +330,15 @@ int serial_tstc () #if defined(CONFIG_UART1_CONSOLE) #define ACTING_UART0_BASE UART1_BASE #define ACTING_UART1_BASE UART0_BASE -#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || \ - defined(CONFIG_440GR) || defined(CONFIG_440SP) || \ - defined(CONFIG_440SPE) -#define UART0_SDR sdr_uart1 -#define UART1_SDR sdr_uart0 -#endif /* CONFIG_440GX */ #else #define ACTING_UART0_BASE UART0_BASE #define ACTING_UART1_BASE UART1_BASE -#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || \ - defined(CONFIG_440GR) || defined(CONFIG_440SP) || \ - defined(CONFIG_440SPE) -#define UART0_SDR sdr_uart0 -#define UART1_SDR sdr_uart1 -#endif /* CONFIG_440GX */ +#endif + +#if defined(CONFIG_SERIAL_MULTI) +#define UART_BASE dev_base +#else +#define UART_BASE ACTING_UART0_BASE #endif #if defined(CONFIG_405EP) && defined(CFG_EXT_SERIAL_CLOCK) @@ -419,7 +434,7 @@ static void serial_divs (int baudrate, unsigned long *pudiv, *pbdiv = div/udiv; } -#endif /* defined(CONFIG_440) && !defined(CFG_EXT_SERIAL_CLK */ +#endif /* defined(CONFIG_440) && !defined(CFG_EXT_SERIAL_CLK) */ /* * Minimal serial functions needed to use one of the SMC ports @@ -441,23 +456,9 @@ int serial_init(void) unsigned long tmp; #endif -#if defined(CONFIG_440GX) || defined(CONFIG_440SP) || \ - defined(CONFIG_440SPE) -#if defined(CONFIG_SERIAL_MULTI) - if (UART0_BASE == dev_base) { - mfsdr(UART0_SDR,reg); - reg &= ~CR0_MASK; - } else { - mfsdr(UART1_SDR,reg); - reg &= ~CR0_MASK; - } -#else - mfsdr(UART0_SDR,reg); + MFREG(UART0_SDR, reg); reg &= ~CR0_MASK; -#endif -#else - reg = mfdcr(cntrl0) & ~CR0_MASK; -#endif /* CONFIG_440GX */ + #ifdef CFG_EXT_SERIAL_CLOCK reg |= CR0_EXTCLK_ENA; udiv = 1; @@ -471,47 +472,34 @@ int serial_init(void) serial_divs (gd->baudrate, &udiv, &bdiv); #endif -#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || \ - defined(CONFIG_440GR) || defined(CONFIG_440SP) || \ - defined(CONFIG_440SPE) - reg |= udiv << CR0_UDIV_POS; /* set the UART divisor */ -#if defined(CONFIG_SERIAL_MULTI) - if (UART0_BASE == dev_base) { - mtsdr (UART0_SDR,reg); - } else { - mtsdr (UART1_SDR,reg); - } -#else - mtsdr (UART0_SDR,reg); + 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 -#else - reg |= (udiv - 1) << CR0_UDIV_POS; /* set the UART divisor */ - mtdcr (cntrl0, reg); +#if defined(UART2_SDR) + MTREG(UART2_SDR, reg); #endif - -#if defined(CONFIG_SERIAL_MULTI) - out8 (dev_base + UART_LCR, 0x80); /* set DLAB bit */ - out8 (dev_base + UART_DLL, bdiv); /* set baudrate divisor */ - out8 (dev_base + UART_DLM, bdiv >> 8);/* set baudrate divisor */ - out8 (dev_base + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */ - out8 (dev_base + UART_FCR, 0x00); /* disable FIFO */ - out8 (dev_base + UART_MCR, 0x00); /* no modem control DTR RTS */ - val = in8 (dev_base + UART_LSR); /* clear line status */ - val = in8 (dev_base + UART_RBR); /* read receive buffer */ - out8 (dev_base + UART_SCR, 0x00); /* set scratchpad */ - out8 (dev_base + UART_IER, 0x00); /* set interrupt enable reg */ -#else - out8 (ACTING_UART0_BASE + UART_LCR, 0x80); /* set DLAB bit */ - out8 (ACTING_UART0_BASE + UART_DLL, bdiv); /* set baudrate divisor */ - out8 (ACTING_UART0_BASE + UART_DLM, bdiv >> 8);/* set baudrate divisor */ - out8 (ACTING_UART0_BASE + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */ - out8 (ACTING_UART0_BASE + UART_FCR, 0x00); /* disable FIFO */ - out8 (ACTING_UART0_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */ - val = in8 (ACTING_UART0_BASE + UART_LSR); /* clear line status */ - val = in8 (ACTING_UART0_BASE + UART_RBR); /* read receive buffer */ - out8 (ACTING_UART0_BASE + UART_SCR, 0x00); /* set scratchpad */ - out8 (ACTING_UART0_BASE + UART_IER, 0x00); /* set interrupt enable reg */ +#if defined(UART3_SDR) + MTREG(UART3_SDR, reg); #endif + + out8(UART_BASE + UART_LCR, 0x80); /* set DLAB bit */ + out8(UART_BASE + UART_DLL, bdiv); /* set baudrate divisor */ + out8(UART_BASE + UART_DLM, bdiv >> 8); /* set baudrate divisor */ + out8(UART_BASE + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */ + out8(UART_BASE + UART_FCR, 0x00); /* disable FIFO */ + out8(UART_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */ + val = in8(UART_BASE + UART_LSR); /* clear line status */ + val = in8(UART_BASE + UART_RBR); /* read receive buffer */ + out8(UART_BASE + UART_SCR, 0x00); /* set scratchpad */ + out8(UART_BASE + UART_IER, 0x00); /* set interrupt enable reg */ + return (0); } @@ -564,29 +552,17 @@ int serial_init (void) tmp = gd->baudrate * udiv * 16; bdiv = (clk + tmp / 2) / tmp; -#if defined(CONFIG_SERIAL_MULTI) - out8 (dev_base + UART_LCR, 0x80); /* set DLAB bit */ - out8 (dev_base + UART_DLL, bdiv); /* set baudrate divisor */ - out8 (dev_base + UART_DLM, bdiv >> 8);/* set baudrate divisor */ - out8 (dev_base + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */ - out8 (dev_base + UART_FCR, 0x00); /* disable FIFO */ - out8 (dev_base + UART_MCR, 0x00); /* no modem control DTR RTS */ - val = in8 (dev_base + UART_LSR); /* clear line status */ - val = in8 (dev_base + UART_RBR); /* read receive buffer */ - out8 (dev_base + UART_SCR, 0x00); /* set scratchpad */ - out8 (dev_base + UART_IER, 0x00); /* set interrupt enable reg */ -#else - out8 (ACTING_UART0_BASE + UART_LCR, 0x80); /* set DLAB bit */ - out8 (ACTING_UART0_BASE + UART_DLL, bdiv); /* set baudrate divisor */ - out8 (ACTING_UART0_BASE + UART_DLM, bdiv >> 8);/* set baudrate divisor */ - out8 (ACTING_UART0_BASE + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */ - out8 (ACTING_UART0_BASE + UART_FCR, 0x00); /* disable FIFO */ - out8 (ACTING_UART0_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */ - val = in8 (ACTING_UART0_BASE + UART_LSR); /* clear line status */ - val = in8 (ACTING_UART0_BASE + UART_RBR); /* read receive buffer */ - out8 (ACTING_UART0_BASE + UART_SCR, 0x00); /* set scratchpad */ - out8 (ACTING_UART0_BASE + UART_IER, 0x00); /* set interrupt enable reg */ -#endif + out8(UART_BASE + UART_LCR, 0x80); /* set DLAB bit */ + out8(UART_BASE + UART_DLL, bdiv); /* set baudrate divisor */ + out8(UART_BASE + UART_DLM, bdiv >> 8); /* set baudrate divisor */ + out8(UART_BASE + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */ + out8(UART_BASE + UART_FCR, 0x00); /* disable FIFO */ + out8(UART_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */ + val = in8(UART_BASE + UART_LSR); /* clear line status */ + val = in8(UART_BASE + UART_RBR); /* read receive buffer */ + out8(UART_BASE + UART_SCR, 0x00); /* set scratchpad */ + out8(UART_BASE + UART_IER, 0x00); /* set interrupt enable reg */ + return (0); } @@ -598,55 +574,10 @@ void serial_setbrg_dev (unsigned long dev_base) void serial_setbrg (void) #endif { - unsigned long tmp; - unsigned long clk; - unsigned long udiv; - unsigned short bdiv; - -#ifdef CFG_EXT_SERIAL_CLOCK - clk = CFG_EXT_SERIAL_CLOCK; -#else - clk = gd->cpu_clk; -#endif - -#ifdef CONFIG_405EP - udiv = ((mfdcr (cpc0_ucr) & UCR0_MASK) >> UCR0_UDIV_POS); -#else - udiv = ((mfdcr (cntrl0) & 0x3e) >> 1) + 1; -#endif /* CONFIG_405EP */ - -#if !defined(CFG_EXT_SERIAL_CLOCK) && \ - ( defined(CONFIG_440GX) || defined(CONFIG_440EP) || \ - defined(CONFIG_440GR) || defined(CONFIG_440SP) || \ - defined(CONFIG_440SPE) ) - serial_divs (gd->baudrate, &udiv, &bdiv); - tmp = udiv << CR0_UDIV_POS; /* set the UART divisor */ -#if defined(CONFIG_SERIAL_MULTI) - if (UART0_BASE == dev_base) { - mtsdr (UART0_SDR, tmp); - } else { - mtsdr (UART1_SDR, tmp); - } -#else - mtsdr (UART0_SDR, tmp); -#endif - -#else - - tmp = gd->baudrate * udiv * 16; - bdiv = (clk + tmp / 2) / tmp; -#endif /* !defined(CFG_EXT_SERIAL_CLOCK) && (...) */ - #if defined(CONFIG_SERIAL_MULTI) - out8 (dev_base + UART_LCR, 0x80); /* set DLAB bit */ - out8 (dev_base + UART_DLL, bdiv); /* set baudrate divisor */ - out8 (dev_base + UART_DLM, bdiv >> 8);/* set baudrate divisor */ - out8 (dev_base + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */ + serial_init_dev(dev_base); #else - out8 (ACTING_UART0_BASE + UART_LCR, 0x80); /* set DLAB bit */ - out8 (ACTING_UART0_BASE + UART_DLL, bdiv); /* set baudrate divisor */ - out8 (ACTING_UART0_BASE + UART_DLM, bdiv >> 8);/* set baudrate divisor */ - out8 (ACTING_UART0_BASE + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */ + serial_init(); #endif } @@ -667,19 +598,11 @@ void serial_putc (const char c) /* check THRE bit, wait for transmiter available */ for (i = 1; i < 3500; i++) { -#if defined(CONFIG_SERIAL_MULTI) - if ((in8 (dev_base + UART_LSR) & 0x20) == 0x20) -#else - if ((in8 (ACTING_UART0_BASE + UART_LSR) & 0x20) == 0x20) -#endif + if ((in8 (UART_BASE + UART_LSR) & 0x20) == 0x20) break; udelay (100); } -#if defined(CONFIG_SERIAL_MULTI) - out8 (dev_base + UART_THR, c); /* put character out */ -#else - out8 (ACTING_UART0_BASE + UART_THR, c); /* put character out */ -#endif + out8 (UART_BASE + UART_THR, c); /* put character out */ } #if defined(CONFIG_SERIAL_MULTI) @@ -709,11 +632,7 @@ int serial_getc (void) #if defined(CONFIG_HW_WATCHDOG) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ #endif /* CONFIG_HW_WATCHDOG */ -#if defined(CONFIG_SERIAL_MULTI) - status = in8 (dev_base + UART_LSR); -#else - status = in8 (ACTING_UART0_BASE + UART_LSR); -#endif + status = in8 (UART_BASE + UART_LSR); if ((status & asyncLSRDataReady1) != 0x0) { break; } @@ -721,22 +640,14 @@ int serial_getc (void) asyncLSROverrunError1 | asyncLSRParityError1 | asyncLSRBreakInterrupt1 )) != 0) { -#if defined(CONFIG_SERIAL_MULTI) - out8 (dev_base + UART_LSR, -#else - out8 (ACTING_UART0_BASE + UART_LSR, -#endif + out8 (UART_BASE + UART_LSR, asyncLSRFramingError1 | asyncLSROverrunError1 | asyncLSRParityError1 | asyncLSRBreakInterrupt1); } } -#if defined(CONFIG_SERIAL_MULTI) - return (0x000000ff & (int) in8 (dev_base)); -#else - return (0x000000ff & (int) in8 (ACTING_UART0_BASE)); -#endif + return (0x000000ff & (int) in8 (UART_BASE)); } #if defined(CONFIG_SERIAL_MULTI) @@ -747,11 +658,7 @@ int serial_tstc (void) { unsigned char status; -#if defined(CONFIG_SERIAL_MULTI) - status = in8 (dev_base + UART_LSR); -#else - status = in8 (ACTING_UART0_BASE + UART_LSR); -#endif + status = in8 (UART_BASE + UART_LSR); if ((status & asyncLSRDataReady1) != 0x0) { return (1); } @@ -759,11 +666,7 @@ int serial_tstc (void) asyncLSROverrunError1 | asyncLSRParityError1 | asyncLSRBreakInterrupt1 )) != 0) { -#if defined(CONFIG_SERIAL_MULTI) - out8 (dev_base + UART_LSR, -#else - out8 (ACTING_UART0_BASE + UART_LSR, -#endif + out8 (UART_BASE + UART_LSR, asyncLSRFramingError1 | asyncLSROverrunError1 | asyncLSRParityError1 | |