* (C) Copyright 2000-2006
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
- * See file CREDITS for list of people who contributed to this
- * project.
+ * (C) Copyright 2010
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
*
- * 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
+ * SPDX-License-Identifier: GPL-2.0 IBM-pibs
*/
#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
+#include <asm/ppc4xx.h>
DECLARE_GLOBAL_DATA_PTR;
-#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || \
+#if defined(CONFIG_405GP) || \
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 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
#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
+#else /* CONFIG_405GP */
#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;
- mfcpr(CPC0_PERD0, reg);
+#if defined(CONFIG_405EZ)
+ mfcpr(CPR0_PERD0, reg);
reg &= ~0x0000ffff;
- reg |= ((udiv - 0) << 8) | (udiv - 0);
- mtcpr(CPC0_PERD0, reg);
- *pbdiv = div / udiv;
+ reg |= ((*udiv - 0) << 8) | (*udiv - 0);
+ mtcpr(CPR0_PERD0, reg);
+#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);
-#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);
+ u32 clk;
+ u32 udiv;
+#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_405GP)
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
- tmp = CONFIG_SYS_BASE_BAUD * 16;
- udiv = (clk + tmp / 2) / tmp;
+#else /* CONFIG_SYS_405_UART_ERRATA_59 */
+ {
+ u32 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 ();
+#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK
+ clk = CONFIG_SYS_EXT_SERIAL_CLOCK;
#else
- while (!(in_8((u8 *)ACTING_UART0_BASE + UART_MSR) & 0x10));
+ clk = CONFIG_SYS_BASE_BAUD * 16;
#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 defined(CONFIG_405EP)
+ {
+ u32 tmp = CONFIG_SYS_BASE_BAUD * 16;
- 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);
+ reg = mfdcr(CPC0_UCR) & ~(UCR0_MASK | UCR1_MASK);
+ clk = gd->cpu_clk;
+ 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 */
- return c;
-}
-
-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,
- 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,
-};
+ /*
+ * Correct UART frequency in bd-info struct now that
+ * the UART divisor is available
+ */
+#ifdef CONFIG_SYS_EXT_SERIAL_CLOCK
+ gd->arch.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->arch.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 */
+#endif /* CONFIG_405GP */
projects / people / ms / u-boot.git / blobdiff