cpu/mpc5xxx/serial.c - u-boot - Git at Google

 /*
  * (C) Copyright 2000 - 2003
  * 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
  *
  * Hacked for MPC8260 by Murray.Jensen@cmst.csiro.au, 19-Oct-00, with
  * changes based on the file arch/ppc/mbxboot/m8260_tty.c from the
  * Linux/PPC sources (m8260_tty.c had no copyright info in it).
  *
  * Martin Krause, 8 Jun 2006
  * Added CONFIG_SERIAL_MULTI support
  */

 /*
  * Minimal serial functions needed to use one of the PSC ports
  * as serial console interface.
  */

 #include <common.h>
 #include <mpc5xxx.h>

 #if defined (CONFIG_SERIAL_MULTI)
 #include <serial.h>
 #endif

 DECLARE_GLOBAL_DATA_PTR;

 #if defined(CONFIG_PSC_CONSOLE)

 #if CONFIG_PSC_CONSOLE == 1
 #define PSC_BASE MPC5XXX_PSC1
 #elif CONFIG_PSC_CONSOLE == 2
 #define PSC_BASE MPC5XXX_PSC2
 #elif CONFIG_PSC_CONSOLE == 3
 #define PSC_BASE MPC5XXX_PSC3
 #elif defined(CONFIG_MGT5100)
 #error CONFIG_PSC_CONSOLE must be in 1, 2 or 3
 #elif CONFIG_PSC_CONSOLE == 4
 #define PSC_BASE MPC5XXX_PSC4
 #elif CONFIG_PSC_CONSOLE == 5
 #define PSC_BASE MPC5XXX_PSC5
 #elif CONFIG_PSC_CONSOLE == 6
 #define PSC_BASE MPC5XXX_PSC6
 #else
 #error CONFIG_PSC_CONSOLE must be in 1 ... 6
 #endif

 #if defined(CONFIG_SERIAL_MULTI) && !defined(CONFIG_PSC_CONSOLE2)
 #error you must define CONFIG_PSC_CONSOLE2 if CONFIG_SERIAL_MULTI is set
 #endif

 #if defined(CONFIG_SERIAL_MULTI)
 #if CONFIG_PSC_CONSOLE2 == 1
 #define PSC_BASE2 MPC5XXX_PSC1
 #elif CONFIG_PSC_CONSOLE2 == 2
 #define PSC_BASE2 MPC5XXX_PSC2
 #elif CONFIG_PSC_CONSOLE2 == 3
 #define PSC_BASE2 MPC5XXX_PSC3
 #elif defined(CONFIG_MGT5100)
 #error CONFIG_PSC_CONSOLE2 must be in 1, 2 or 3
 #elif CONFIG_PSC_CONSOLE2 == 4
 #define PSC_BASE2 MPC5XXX_PSC4
 #elif CONFIG_PSC_CONSOLE2 == 5
 #define PSC_BASE2 MPC5XXX_PSC5
 #elif CONFIG_PSC_CONSOLE2 == 6
 #define PSC_BASE2 MPC5XXX_PSC6
 #else
 #error CONFIG_PSC_CONSOLE2 must be in 1 ... 6
 #endif
 #endif /* CONFIG_SERIAL_MULTI */

 #if defined(CONFIG_SERIAL_MULTI)
 int serial_init_dev (unsigned long dev_base)
 #else
 int serial_init (void)
 #endif
 {
 #if defined(CONFIG_SERIAL_MULTI)
 	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
 #else
 	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
 #endif
 	unsigned long baseclk;
 	int div;

 	/* reset PSC */
 	psc->command = PSC_SEL_MODE_REG_1;

 	/* select clock sources */
 #if defined(CONFIG_MGT5100)
 	psc->psc_clock_select = 0xdd00;
 	baseclk = (CFG_MPC5XXX_CLKIN + 16) / 32;
 #elif defined(CONFIG_MPC5200)
 	psc->psc_clock_select = 0;
 	baseclk = (gd->ipb_clk + 16) / 32;
 #endif

 	/* switch to UART mode */
 	psc->sicr = 0;

 	/* configure parity, bit length and so on */
 #if defined(CONFIG_MGT5100)
 	psc->mode = PSC_MODE_ERR | PSC_MODE_8_BITS | PSC_MODE_PARNONE;
 #elif defined(CONFIG_MPC5200)
 	psc->mode = PSC_MODE_8_BITS | PSC_MODE_PARNONE;
 #endif
 	psc->mode = PSC_MODE_ONE_STOP;

 	/* set up UART divisor */
 	div = (baseclk + (gd->baudrate/2)) / gd->baudrate;
 	psc->ctur = (div >> 8) & 0xff;
 	psc->ctlr = div & 0xff;

 	/* disable all interrupts */
 	psc->psc_imr = 0;

 	/* reset and enable Rx/Tx */
 	psc->command = PSC_RST_RX;
 	psc->command = PSC_RST_TX;
 	psc->command = PSC_RX_ENABLE | PSC_TX_ENABLE;

 	return (0);
 }

 #if defined(CONFIG_SERIAL_MULTI)
 void serial_putc_dev (unsigned long dev_base, const char c)
 #else
 void serial_putc(const char c)
 #endif
 {
 #if defined(CONFIG_SERIAL_MULTI)
 	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
 #else
 	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
 #endif

 	if (c == '\n')
 #if defined(CONFIG_SERIAL_MULTI)
 		serial_putc_dev (dev_base, '\r');
 #else
 		serial_putc('\r');
 #endif

 	/* Wait for last character to go. */
 	while (!(psc->psc_status & PSC_SR_TXEMP))
 		;

 	psc->psc_buffer_8 = c;
 }

 #if defined(CONFIG_SERIAL_MULTI)
 void serial_puts_dev (unsigned long dev_base, const char *s)
 #else
 void serial_puts (const char *s)
 #endif
 {
 	while (*s) {
 #if defined(CONFIG_SERIAL_MULTI)
 		serial_putc_dev (dev_base, *s++);
 #else
 		serial_putc (*s++);
 #endif
 	}
 }

 #if defined(CONFIG_SERIAL_MULTI)
 int serial_getc_dev (unsigned long dev_base)
 #else
 int serial_getc(void)
 #endif
 {
 #if defined(CONFIG_SERIAL_MULTI)
 	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
 #else
 	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
 #endif

 	/* Wait for a character to arrive. */
 	while (!(psc->psc_status & PSC_SR_RXRDY))
 		;

 	return psc->psc_buffer_8;
 }

 #if defined(CONFIG_SERIAL_MULTI)
 int serial_tstc_dev (unsigned long dev_base)
 #else
 int serial_tstc(void)
 #endif
 {
 #if defined(CONFIG_SERIAL_MULTI)
 	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
 #else
 	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
 #endif

 	return (psc->psc_status & PSC_SR_RXRDY);
 }

 #if defined(CONFIG_SERIAL_MULTI)
 void serial_setbrg_dev (unsigned long dev_base)
 #else
 void serial_setbrg(void)
 #endif
 {
 #if defined(CONFIG_SERIAL_MULTI)
 	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)dev_base;
 #else
 	volatile struct mpc5xxx_psc *psc = (struct mpc5xxx_psc *)PSC_BASE;
 #endif
 	unsigned long baseclk, div;

 #if defined(CONFIG_MGT5100)
 	baseclk = (CFG_MPC5XXX_CLKIN + 16) / 32;
 #elif defined(CONFIG_MPC5200)
 	baseclk = (gd->ipb_clk + 16) / 32;
 #endif

 	/* set up UART divisor */
 	div = (baseclk + (gd->baudrate/2)) / gd->baudrate;
 	psc->ctur = (div >> 8) & 0xFF;
 	psc->ctlr =  div & 0xff;
 }

 #if defined(CONFIG_SERIAL_MULTI)
 int serial0_init(void)
 {
 	return (serial_init_dev(PSC_BASE));
 }

 int serial1_init(void)
 {
 	return (serial_init_dev(PSC_BASE2));
 }
 void serial0_setbrg (void)
 {
 	serial_setbrg_dev(PSC_BASE);
 }
 void serial1_setbrg (void)
 {
 	serial_setbrg_dev(PSC_BASE2);
 }

 void serial0_putc(const char c)
 {
 	serial_putc_dev(PSC_BASE,c);
 }

 void serial1_putc(const char c)
 {
 	serial_putc_dev(PSC_BASE2, c);
 }
 void serial0_puts(const char *s)
 {
 	serial_puts_dev(PSC_BASE, s);
 }

 void serial1_puts(const char *s)
 {
 	serial_puts_dev(PSC_BASE2, s);
 }

 int serial0_getc(void)
 {
 	return(serial_getc_dev(PSC_BASE));
 }

 int serial1_getc(void)
 {
 	return(serial_getc_dev(PSC_BASE2));
 }
 int serial0_tstc(void)
 {
 	return (serial_tstc_dev(PSC_BASE));
 }

 int serial1_tstc(void)
 {
 	return (serial_tstc_dev(PSC_BASE2));
 }

 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,
 };
 #endif /* CONFIG_SERIAL_MULTI */

 #endif /* CONFIG_PSC_CONSOLE */
	/*
	* (C) Copyright 2000 - 2003
	* 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
	*
	* Hacked for MPC8260 by Murray.Jensen@cmst.csiro.au, 19-Oct-00, with
	* changes based on the file arch/ppc/mbxboot/m8260_tty.c from the
	* Linux/PPC sources (m8260_tty.c had no copyright info in it).
	*
	* Martin Krause, 8 Jun 2006
	* Added CONFIG_SERIAL_MULTI support
	*/

	/*
	* Minimal serial functions needed to use one of the PSC ports
	* as serial console interface.
	*/

	#include <common.h>
	#include <mpc5xxx.h>

	#if defined (CONFIG_SERIAL_MULTI)
	#include <serial.h>
	#endif

	DECLARE_GLOBAL_DATA_PTR;

	#if defined(CONFIG_PSC_CONSOLE)

	#if CONFIG_PSC_CONSOLE == 1
	#define PSC_BASE MPC5XXX_PSC1
	#elif CONFIG_PSC_CONSOLE == 2
	#define PSC_BASE MPC5XXX_PSC2
	#elif CONFIG_PSC_CONSOLE == 3
	#define PSC_BASE MPC5XXX_PSC3
	#elif defined(CONFIG_MGT5100)
	#error CONFIG_PSC_CONSOLE must be in 1, 2 or 3
	#elif CONFIG_PSC_CONSOLE == 4
	#define PSC_BASE MPC5XXX_PSC4
	#elif CONFIG_PSC_CONSOLE == 5
	#define PSC_BASE MPC5XXX_PSC5
	#elif CONFIG_PSC_CONSOLE == 6
	#define PSC_BASE MPC5XXX_PSC6
	#else
	#error CONFIG_PSC_CONSOLE must be in 1 ... 6
	#endif

	#if defined(CONFIG_SERIAL_MULTI) && !defined(CONFIG_PSC_CONSOLE2)
	#error you must define CONFIG_PSC_CONSOLE2 if CONFIG_SERIAL_MULTI is set
	#endif

	#if defined(CONFIG_SERIAL_MULTI)
	#if CONFIG_PSC_CONSOLE2 == 1
	#define PSC_BASE2 MPC5XXX_PSC1
	#elif CONFIG_PSC_CONSOLE2 == 2
	#define PSC_BASE2 MPC5XXX_PSC2
	#elif CONFIG_PSC_CONSOLE2 == 3
	#define PSC_BASE2 MPC5XXX_PSC3
	#elif defined(CONFIG_MGT5100)
	#error CONFIG_PSC_CONSOLE2 must be in 1, 2 or 3
	#elif CONFIG_PSC_CONSOLE2 == 4
	#define PSC_BASE2 MPC5XXX_PSC4
	#elif CONFIG_PSC_CONSOLE2 == 5
	#define PSC_BASE2 MPC5XXX_PSC5
	#elif CONFIG_PSC_CONSOLE2 == 6
	#define PSC_BASE2 MPC5XXX_PSC6
	#else
	#error CONFIG_PSC_CONSOLE2 must be in 1 ... 6
	#endif
	#endif /* CONFIG_SERIAL_MULTI */

	#if defined(CONFIG_SERIAL_MULTI)
	int serial_init_dev (unsigned long dev_base)
	#else
	int serial_init (void)
	#endif
	{
	#if defined(CONFIG_SERIAL_MULTI)
	volatile struct mpc5xxx_psc psc = (struct mpc5xxx_psc )dev_base;
	#else
	volatile struct mpc5xxx_psc psc = (struct mpc5xxx_psc )PSC_BASE;
	#endif
	unsigned long baseclk;
	int div;

	/* reset PSC */
	psc->command = PSC_SEL_MODE_REG_1;

	/* select clock sources */
	#if defined(CONFIG_MGT5100)
	psc->psc_clock_select = 0xdd00;
	baseclk = (CFG_MPC5XXX_CLKIN + 16) / 32;
	#elif defined(CONFIG_MPC5200)
	psc->psc_clock_select = 0;
	baseclk = (gd->ipb_clk + 16) / 32;
	#endif

	/* switch to UART mode */
	psc->sicr = 0;

	/* configure parity, bit length and so on */
	#if defined(CONFIG_MGT5100)
	psc->mode = PSC_MODE_ERR \| PSC_MODE_8_BITS \| PSC_MODE_PARNONE;
	#elif defined(CONFIG_MPC5200)
	psc->mode = PSC_MODE_8_BITS \| PSC_MODE_PARNONE;
	#endif
	psc->mode = PSC_MODE_ONE_STOP;

	/* set up UART divisor */
	div = (baseclk + (gd->baudrate/2)) / gd->baudrate;
	psc->ctur = (div >> 8) & 0xff;
	psc->ctlr = div & 0xff;

	/* disable all interrupts */
	psc->psc_imr = 0;

	/* reset and enable Rx/Tx */
	psc->command = PSC_RST_RX;
	psc->command = PSC_RST_TX;
	psc->command = PSC_RX_ENABLE \| PSC_TX_ENABLE;

	return (0);
	}

	#if defined(CONFIG_SERIAL_MULTI)
	void serial_putc_dev (unsigned long dev_base, const char c)
	#else
	void serial_putc(const char c)
	#endif
	{
	#if defined(CONFIG_SERIAL_MULTI)
	volatile struct mpc5xxx_psc psc = (struct mpc5xxx_psc )dev_base;
	#else
	volatile struct mpc5xxx_psc psc = (struct mpc5xxx_psc )PSC_BASE;
	#endif

	if (c == '\n')
	#if defined(CONFIG_SERIAL_MULTI)
	serial_putc_dev (dev_base, '\r');
	#else
	serial_putc('\r');
	#endif

	/* Wait for last character to go. */
	while (!(psc->psc_status & PSC_SR_TXEMP))
	;

	psc->psc_buffer_8 = c;
	}

	#if defined(CONFIG_SERIAL_MULTI)
	void serial_puts_dev (unsigned long dev_base, const char *s)
	#else
	void serial_puts (const char *s)
	#endif
	{
	while (*s) {
	#if defined(CONFIG_SERIAL_MULTI)
	serial_putc_dev (dev_base, *s++);
	#else
	serial_putc (*s++);
	#endif
	}
	}

	#if defined(CONFIG_SERIAL_MULTI)
	int serial_getc_dev (unsigned long dev_base)
	#else
	int serial_getc(void)
	#endif
	{
	#if defined(CONFIG_SERIAL_MULTI)
	volatile struct mpc5xxx_psc psc = (struct mpc5xxx_psc )dev_base;
	#else
	volatile struct mpc5xxx_psc psc = (struct mpc5xxx_psc )PSC_BASE;
	#endif

	/* Wait for a character to arrive. */
	while (!(psc->psc_status & PSC_SR_RXRDY))
	;

	return psc->psc_buffer_8;
	}

	#if defined(CONFIG_SERIAL_MULTI)
	int serial_tstc_dev (unsigned long dev_base)
	#else
	int serial_tstc(void)
	#endif
	{
	#if defined(CONFIG_SERIAL_MULTI)
	volatile struct mpc5xxx_psc psc = (struct mpc5xxx_psc )dev_base;
	#else
	volatile struct mpc5xxx_psc psc = (struct mpc5xxx_psc )PSC_BASE;
	#endif

	return (psc->psc_status & PSC_SR_RXRDY);
	}

	#if defined(CONFIG_SERIAL_MULTI)
	void serial_setbrg_dev (unsigned long dev_base)
	#else
	void serial_setbrg(void)
	#endif
	{
	#if defined(CONFIG_SERIAL_MULTI)
	volatile struct mpc5xxx_psc psc = (struct mpc5xxx_psc )dev_base;
	#else
	volatile struct mpc5xxx_psc psc = (struct mpc5xxx_psc )PSC_BASE;
	#endif
	unsigned long baseclk, div;

	#if defined(CONFIG_MGT5100)
	baseclk = (CFG_MPC5XXX_CLKIN + 16) / 32;
	#elif defined(CONFIG_MPC5200)
	baseclk = (gd->ipb_clk + 16) / 32;
	#endif

	/* set up UART divisor */
	div = (baseclk + (gd->baudrate/2)) / gd->baudrate;
	psc->ctur = (div >> 8) & 0xFF;
	psc->ctlr = div & 0xff;
	}

	#if defined(CONFIG_SERIAL_MULTI)
	int serial0_init(void)
	{
	return (serial_init_dev(PSC_BASE));
	}

	int serial1_init(void)
	{
	return (serial_init_dev(PSC_BASE2));
	}
	void serial0_setbrg (void)
	{
	serial_setbrg_dev(PSC_BASE);
	}
	void serial1_setbrg (void)
	{
	serial_setbrg_dev(PSC_BASE2);
	}

	void serial0_putc(const char c)
	{
	serial_putc_dev(PSC_BASE,c);
	}

	void serial1_putc(const char c)
	{
	serial_putc_dev(PSC_BASE2, c);
	}
	void serial0_puts(const char *s)
	{
	serial_puts_dev(PSC_BASE, s);
	}

	void serial1_puts(const char *s)
	{
	serial_puts_dev(PSC_BASE2, s);
	}

	int serial0_getc(void)
	{
	return(serial_getc_dev(PSC_BASE));
	}

	int serial1_getc(void)
	{
	return(serial_getc_dev(PSC_BASE2));
	}
	int serial0_tstc(void)
	{
	return (serial_tstc_dev(PSC_BASE));
	}

	int serial1_tstc(void)
	{
	return (serial_tstc_dev(PSC_BASE2));
	}

	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,
	};
	#endif /* CONFIG_SERIAL_MULTI */

	#endif /* CONFIG_PSC_CONSOLE */