summaryrefslogtreecommitdiff
path: root/arch/powerpc/cpu/ppc4xx/4xx_uart.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/cpu/ppc4xx/4xx_uart.c')
-rw-r--r--arch/powerpc/cpu/ppc4xx/4xx_uart.c878
1 files changed, 878 insertions, 0 deletions
diff --git a/arch/powerpc/cpu/ppc4xx/4xx_uart.c b/arch/powerpc/cpu/ppc4xx/4xx_uart.c
new file mode 100644
index 000000000..8de65425c
--- /dev/null
+++ b/arch/powerpc/cpu/ppc4xx/4xx_uart.c
@@ -0,0 +1,878 @@
+/*
+ * (C) Copyright 2000-2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * This source code is dual-licensed. You may use it under the terms of the
+ * GNU General Public License version 2, or under the license below.
+ *
+ * This source code has been made available to you by IBM on an AS-IS
+ * basis. Anyone receiving this source is licensed under IBM
+ * copyrights to use it in any way he or she deems fit, including
+ * copying it, modifying it, compiling it, and redistributing it either
+ * with or without modifications. No license under IBM patents or
+ * patent applications is to be implied by the copyright license.
+ *
+ * Any user of this software should understand that IBM cannot provide
+ * technical support for this software and will not be responsible for
+ * any consequences resulting from the use of this software.
+ *
+ * Any person who transfers this source code or any derivative work
+ * must include the IBM copyright notice, this paragraph, and the
+ * preceding two paragraphs in the transferred software.
+ *
+ * COPYRIGHT I B M CORPORATION 1995
+ * LICENSED MATERIAL - PROGRAM PROPERTY OF I B M
+ */
+
+#include <common.h>
+#include <commproc.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <watchdog.h>
+#include <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) || \
+ defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
+ 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
+#define CR0_EXTCLK_ENA 0x00600000
+#define CR0_UDIV_POS 16
+#define UDIV_SUBTRACT 1
+#define UART0_SDR CPC0_CR0
+#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 SDR0_UART0
+#define UART1_SDR SDR0_UART1
+#if defined(CONFIG_440EP) || defined(CONFIG_440EPX) || \
+ defined(CONFIG_440GR) || defined(CONFIG_440GRX) || \
+ defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
+ defined(CONFIG_460EX) || defined(CONFIG_460GT)
+#define UART2_SDR SDR0_UART2
+#endif
+#if defined(CONFIG_440EP) || defined(CONFIG_440EPX) || \
+ defined(CONFIG_440GR) || defined(CONFIG_440GRX) || \
+ defined(CONFIG_460EX) || defined(CONFIG_460GT)
+#define UART3_SDR SDR0_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) || 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 CR0_MASK 0x000000ff
+#define CR0_EXTCLK_ENA 0x00800000
+#define CR0_UDIV_POS 0
+#define UDIV_SUBTRACT 0
+#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)
+{
+ 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 */
+
+ 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;
+
+ /* 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 */
+
+ /* i is the test udiv value -- start with the largest
+ * possible (256) to minimize serial clock and constrain
+ * search to umin.
+ */
+ for (i = 256; 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;
+ mfcpr(CPC0_PERD0, reg);
+ reg &= ~0x0000ffff;
+ reg |= ((udiv - 0) << 8) | (udiv - 0);
+ mtcpr(CPC0_PERD0, reg);
+ *pbdiv = div / udiv;
+}
+#endif /* defined(CONFIG_440) && !defined(CONFIG_SYS_EXT_SERIAL_CLK) */
+
+/*
+ * Minimal serial functions needed to use one of the SMC ports
+ * as serial console interface.
+ */
+
+#if defined(CONFIG_440)
+int serial_init_dev(unsigned long base)
+{
+ 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);
+#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);
+#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);
+#endif
+ reg |= (udiv - UDIV_SUBTRACT) << CR0_UDIV_POS; /* set the UART divisor */
+
+ /*
+ * Configure input clock to baudrate generator for all
+ * available serial ports here
+ */
+ 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 */
+ 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
+ clk = gd->cpu_clk;
+#ifdef CONFIG_SYS_405_UART_ERRATA_59
+ udiv = 31; /* Errata 59: stuck at 31 */
+#else
+ 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
+ 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 ();
+#else
+ while (rx_get == buf_info.rx_put);
+#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);
+ }
+
+ return c;
+}
+
+int serial_buffered_tstc (void)
+{
+ return (buf_info.rx_get != buf_info.rx_put) ? 1 : 0;
+}
+
+#endif /* CONFIG_SERIAL_SOFTWARE_FIFO */
+
+#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;
+
+ get_clocks ();
+ br_reg = (((((gd->cpu_clk / 16) / 18) * 10) / CONFIG_KGDB_BAUDRATE) +
+ 5) / 10;
+ /*
+ * Init onboard 16550 UART
+ */
+ 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) */
+#endif
+
+
+#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,
+ serial0_setbrg,
+ serial0_getc,
+ serial0_tstc,
+ serial0_putc,
+ serial0_puts,
+};
+
+struct serial_device serial1_device =
+{
+ "serial1",
+ "UART1",
+ serial1_init,
+ serial1_setbrg,
+ serial1_getc,
+ serial1_tstc,
+ serial1_putc,
+ serial1_puts,
+};
+#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);
+}
+
+int serial_tstc(void)
+{
+ return serial_tstc_dev(ACTING_UART0_BASE);
+}
+#endif /* CONFIG_SERIAL_MULTI */
+
+#endif /* CONFIG_405GP || CONFIG_405CR */
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 09:01:00 +0000