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Diffstat (limited to 'cpu/ppc4xx/serial.c')
-rw-r--r--cpu/ppc4xx/serial.c263
1 files changed, 83 insertions, 180 deletions
diff --git a/cpu/ppc4xx/serial.c b/cpu/ppc4xx/serial.c
index ad3ca6e81..fab0d9500 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 |
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 01:30:41 +0000