diff options
author | stroese <stroese> | 2003-05-23 11:25:57 +0000 |
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committer | stroese <stroese> | 2003-05-23 11:25:57 +0000 |
commit | 8749cfb44e072ebaddd918be9907a9f773d31fe3 (patch) | |
tree | 1b3446e8bf5073ec69976916a6b4477f9d8f8819 | |
parent | b867d705b6217fed505dd44cf539699b8a81733d (diff) | |
download | u-boot-8749cfb44e072ebaddd918be9907a9f773d31fe3.zip u-boot-8749cfb44e072ebaddd918be9907a9f773d31fe3.tar.gz u-boot-8749cfb44e072ebaddd918be9907a9f773d31fe3.tar.bz2 |
- PPC405EP support added.
- CONFIG_UART1_CONSOLE added (see README).
-rw-r--r-- | cpu/ppc4xx/serial.c | 169 |
1 files changed, 103 insertions, 66 deletions
diff --git a/cpu/ppc4xx/serial.c b/cpu/ppc4xx/serial.c index 5a6af76..6b0e39a 100644 --- a/cpu/ppc4xx/serial.c +++ b/cpu/ppc4xx/serial.c @@ -266,7 +266,7 @@ int serial_tstc () /*****************************************************************************/ -#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) +#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) || defined(CONFIG_405EP) #if defined(CONFIG_440) #define UART0_BASE CFG_PERIPHERAL_BASE + 0x00000200 @@ -274,13 +274,34 @@ int serial_tstc () #define CR0_MASK 0x3fff0000 #define CR0_EXTCLK_ENA 0x00600000 #define CR0_UDIV_POS 16 -#else -#define UART_BASE_PTR 0xF800FFFC; /* pointer to uart base */ +#elif defined(CONFIG_405EP) +#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 +#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(CFG_EXT_SERIAL_CLOCK) +#error "External serial clock not supported on IBM PPC405EP!" #endif #define UART_RBR 0x00 @@ -299,7 +320,7 @@ int serial_tstc () /*-----------------------------------------------------------------------------+ | Line Status Register. +-----------------------------------------------------------------------------*/ -/*#define asyncLSRport1 UART0_BASE+0x05 */ +/*#define asyncLSRport1 ACTING_UART0_BASE+0x05 */ #define asyncLSRDataReady1 0x01 #define asyncLSROverrunError1 0x02 #define asyncLSRParityError1 0x04 @@ -312,8 +333,8 @@ int serial_tstc () /*-----------------------------------------------------------------------------+ | Miscellanies defines. +-----------------------------------------------------------------------------*/ -/*#define asyncTxBufferport1 UART0_BASE+0x00 */ -/*#define asyncRxBufferport1 UART0_BASE+0x00 */ +/*#define asyncTxBufferport1 ACTING_UART0_BASE+0x00 */ +/*#define asyncRxBufferport1 ACTING_UART0_BASE+0x00 */ #if CONFIG_SERIAL_SOFTWARE_FIFO @@ -412,16 +433,16 @@ int serial_init (void) reg |= (udiv - 1) << CR0_UDIV_POS; /* set the UART divisor */ mtdcr (cntrl0, reg); - out8 (UART0_BASE + UART_LCR, 0x80); /* set DLAB bit */ - out8 (UART0_BASE + UART_DLL, bdiv); /* set baudrate divisor */ - out8 (UART0_BASE + UART_DLM, bdiv >> 8);/* set baudrate divisor */ - out8 (UART0_BASE + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */ - out8 (UART0_BASE + UART_FCR, 0x00); /* disable FIFO */ - out8 (UART0_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */ - val = in8 (UART0_BASE + UART_LSR); /* clear line status */ - val = in8 (UART0_BASE + UART_RBR); /* read receive buffer */ - out8 (UART0_BASE + UART_SCR, 0x00); /* set scratchpad */ - out8 (UART0_BASE + UART_IER, 0x00); /* set interrupt enable reg */ + 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 */ return (0); } @@ -439,6 +460,17 @@ int serial_init (void) unsigned short bdiv; volatile char val; +#ifdef CONFIG_405EP + reg = mfdcr(cpc0_ucr) & ~(UCR0_MASK | UCR1_MASK); + clk = gd->cpu_clk; + tmp = CFG_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 */ reg = mfdcr(cntrl0) & ~CR0_MASK; #ifdef CFG_EXT_SERIAL_CLOCK clk = CFG_EXT_SERIAL_CLOCK; @@ -451,27 +483,27 @@ int serial_init (void) #else tmp = CFG_BASE_BAUD * 16; udiv = (clk + tmp / 2) / tmp; - if (udiv > 32) /* max. 5 bits for udiv */ - udiv = 32; + if (udiv > UDIV_MAX) /* max. n bits for udiv */ + udiv = UDIV_MAX; #endif #endif - reg |= (udiv - 1) << CR0_UDIV_POS; /* set the UART divisor */ mtdcr (cntrl0, reg); +#endif /* CONFIG_405EP */ tmp = gd->baudrate * udiv * 16; bdiv = (clk + tmp / 2) / tmp; - out8 (UART0_BASE + UART_LCR, 0x80); /* set DLAB bit */ - out8 (UART0_BASE + UART_DLL, bdiv); /* set baudrate divisor */ - out8 (UART0_BASE + UART_DLM, bdiv >> 8);/* set baudrate divisor */ - out8 (UART0_BASE + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */ - out8 (UART0_BASE + UART_FCR, 0x00); /* disable FIFO */ - out8 (UART0_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */ - val = in8 (UART0_BASE + UART_LSR); /* clear line status */ - val = in8 (UART0_BASE + UART_RBR); /* read receive buffer */ - out8 (UART0_BASE + UART_SCR, 0x00); /* set scratchpad */ - out8 (UART0_BASE + UART_IER, 0x00); /* set interrupt enable reg */ + 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 */ return (0); } @@ -492,14 +524,19 @@ void serial_setbrg (void) #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 */ tmp = gd->baudrate * udiv * 16; bdiv = (clk + tmp / 2) / tmp; - out8 (UART0_BASE + UART_LCR, 0x80); /* set DLAB bit */ - out8 (UART0_BASE + UART_DLL, bdiv); /* set baudrate divisor */ - out8 (UART0_BASE + UART_DLM, bdiv >> 8);/* set baudrate divisor */ - out8 (UART0_BASE + UART_LCR, 0x03); /* clear DLAB; set 8 bits, no parity */ + 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 */ } @@ -512,11 +549,11 @@ void serial_putc (const char c) /* check THRE bit, wait for transmiter available */ for (i = 1; i < 3500; i++) { - if ((in8 (UART0_BASE + UART_LSR) & 0x20) == 0x20) + if ((in8 (ACTING_UART0_BASE + UART_LSR) & 0x20) == 0x20) break; udelay (100); } - out8 (UART0_BASE + UART_THR, c); /* put character out */ + out8 (ACTING_UART0_BASE + UART_THR, c); /* put character out */ } @@ -536,7 +573,7 @@ int serial_getc () #if defined(CONFIG_HW_WATCHDOG) WATCHDOG_RESET (); /* Reset HW Watchdog, if needed */ #endif /* CONFIG_HW_WATCHDOG */ - status = in8 (UART0_BASE + UART_LSR); + status = in8 (ACTING_UART0_BASE + UART_LSR); if ((status & asyncLSRDataReady1) != 0x0) { break; } @@ -544,14 +581,14 @@ int serial_getc () asyncLSROverrunError1 | asyncLSRParityError1 | asyncLSRBreakInterrupt1 )) != 0) { - out8 (UART0_BASE + UART_LSR, + out8 (ACTING_UART0_BASE + UART_LSR, asyncLSRFramingError1 | asyncLSROverrunError1 | asyncLSRParityError1 | asyncLSRBreakInterrupt1); } } - return (0x000000ff & (int) in8 (UART0_BASE)); + return (0x000000ff & (int) in8 (ACTING_UART0_BASE)); } @@ -559,7 +596,7 @@ int serial_tstc () { unsigned char status; - status = in8 (UART0_BASE + UART_LSR); + status = in8 (ACTING_UART0_BASE + UART_LSR); if ((status & asyncLSRDataReady1) != 0x0) { return (1); } @@ -567,7 +604,7 @@ int serial_tstc () asyncLSROverrunError1 | asyncLSRParityError1 | asyncLSRBreakInterrupt1 )) != 0) { - out8 (UART0_BASE + UART_LSR, + out8 (ACTING_UART0_BASE + UART_LSR, asyncLSRFramingError1 | asyncLSROverrunError1 | asyncLSRParityError1 | @@ -601,8 +638,8 @@ void serial_isr (void *arg) rx_put = 0; if (space < CONFIG_SERIAL_SOFTWARE_FIFO / 4) { /* Stop flow by setting RTS inactive */ - out8 (UART0_BASE + UART_MCR, - in8 (UART0_BASE + UART_MCR) & (0xFF ^ 0x02)); + out8 (ACTING_UART0_BASE + UART_MCR, + in8 (ACTING_UART0_BASE + UART_MCR) & (0xFF ^ 0x02)); } } buf_info.rx_put = rx_put; @@ -615,7 +652,7 @@ void serial_buffered_init (void) buf_info.rx_put = 0; buf_info.rx_get = 0; - if (in8 (UART0_BASE + UART_MSR) & 0x10) { + if (in8 (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"); @@ -626,24 +663,24 @@ void serial_buffered_init (void) (void *) &buf_info /*void *arg */ ); /* Enable "RX Data Available" Interrupt on UART */ - /* out8(UART0_BASE + UART_IER, in8(UART0_BASE + UART_IER) |0x01); */ - out8 (UART0_BASE + UART_IER, 0x01); + /* out8(ACTING_UART0_BASE + UART_IER, in8(ACTING_UART0_BASE + UART_IER) |0x01); */ + out8 (ACTING_UART0_BASE + UART_IER, 0x01); /* Set DTR active */ - out8 (UART0_BASE + UART_MCR, in8 (UART0_BASE + UART_MCR) | 0x01); + out8 (ACTING_UART0_BASE + UART_MCR, in8 (ACTING_UART0_BASE + UART_MCR) | 0x01); /* Start flow by setting RTS active */ - out8 (UART0_BASE + UART_MCR, in8 (UART0_BASE + UART_MCR) | 0x02); + out8 (ACTING_UART0_BASE + UART_MCR, in8 (ACTING_UART0_BASE + UART_MCR) | 0x02); /* Setup UART FIFO: RX trigger level: 4 byte, Enable FIFO */ - out8 (UART0_BASE + UART_FCR, (1 << 6) | 1); + out8 (ACTING_UART0_BASE + UART_FCR, (1 << 6) | 1); } void serial_buffered_putc (const char c) { /* Wait for CTS */ #if defined(CONFIG_HW_WATCHDOG) - while (!(in8 (UART0_BASE + UART_MSR) & 0x10)) + while (!(in8 (ACTING_UART0_BASE + UART_MSR) & 0x10)) WATCHDOG_RESET (); #else - while (!(in8 (UART0_BASE + UART_MSR) & 0x10)); + while (!(in8 (ACTING_UART0_BASE + UART_MSR) & 0x10)); #endif serial_putc (c); } @@ -679,7 +716,7 @@ int serial_buffered_getc (void) } if (space > CONFIG_SERIAL_SOFTWARE_FIFO / 2) { /* Start flow by setting RTS active */ - out8 (UART0_BASE + UART_MCR, in8 (UART0_BASE + UART_MCR) | 0x02); + out8 (ACTING_UART0_BASE + UART_MCR, in8 (ACTING_UART0_BASE + UART_MCR) | 0x02); } return c; @@ -716,16 +753,16 @@ void kgdb_serial_init (void) /* * Init onboard 16550 UART */ - out8 (UART1_BASE + UART_LCR, 0x80); /* set DLAB bit */ - out8 (UART1_BASE + UART_DLL, (br_reg & 0x00ff)); /* set divisor for 9600 baud */ - out8 (UART1_BASE + UART_DLM, ((br_reg & 0xff00) >> 8)); /* set divisor for 9600 baud */ - out8 (UART1_BASE + UART_LCR, 0x03); /* line control 8 bits no parity */ - out8 (UART1_BASE + UART_FCR, 0x00); /* disable FIFO */ - out8 (UART1_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */ - val = in8 (UART1_BASE + UART_LSR); /* clear line status */ - val = in8 (UART1_BASE + UART_RBR); /* read receive buffer */ - out8 (UART1_BASE + UART_SCR, 0x00); /* set scratchpad */ - out8 (UART1_BASE + UART_IER, 0x00); /* set interrupt enable reg */ + out8 (ACTING_UART1_BASE + UART_LCR, 0x80); /* set DLAB bit */ + out8 (ACTING_UART1_BASE + UART_DLL, (br_reg & 0x00ff)); /* set divisor for 9600 baud */ + out8 (ACTING_UART1_BASE + UART_DLM, ((br_reg & 0xff00) >> 8)); /* set divisor for 9600 baud */ + out8 (ACTING_UART1_BASE + UART_LCR, 0x03); /* line control 8 bits no parity */ + out8 (ACTING_UART1_BASE + UART_FCR, 0x00); /* disable FIFO */ + out8 (ACTING_UART1_BASE + UART_MCR, 0x00); /* no modem control DTR RTS */ + val = in8 (ACTING_UART1_BASE + UART_LSR); /* clear line status */ + val = in8 (ACTING_UART1_BASE + UART_RBR); /* read receive buffer */ + out8 (ACTING_UART1_BASE + UART_SCR, 0x00); /* set scratchpad */ + out8 (ACTING_UART1_BASE + UART_IER, 0x00); /* set interrupt enable reg */ } @@ -734,10 +771,10 @@ void putDebugChar (const char c) if (c == '\n') serial_putc ('\r'); - out8 (UART1_BASE + UART_THR, c); /* put character out */ + out8 (ACTING_UART1_BASE + UART_THR, c); /* put character out */ /* check THRE bit, wait for transfer done */ - while ((in8 (UART1_BASE + UART_LSR) & 0x20) != 0x20); + while ((in8 (ACTING_UART1_BASE + UART_LSR) & 0x20) != 0x20); } @@ -754,7 +791,7 @@ int getDebugChar (void) unsigned char status = 0; while (1) { - status = in8 (UART1_BASE + UART_LSR); + status = in8 (ACTING_UART1_BASE + UART_LSR); if ((status & asyncLSRDataReady1) != 0x0) { break; } @@ -762,14 +799,14 @@ int getDebugChar (void) asyncLSROverrunError1 | asyncLSRParityError1 | asyncLSRBreakInterrupt1 )) != 0) { - out8 (UART1_BASE + UART_LSR, + out8 (ACTING_UART1_BASE + UART_LSR, asyncLSRFramingError1 | asyncLSROverrunError1 | asyncLSRParityError1 | asyncLSRBreakInterrupt1); } } - return (0x000000ff & (int) in8 (UART1_BASE)); + return (0x000000ff & (int) in8 (ACTING_UART1_BASE)); } |