Initial revision

1 files changed, 640 insertions, 0 deletions

diff --git a/cpu/mpc8xx/serial.c b/cpu/mpc8xx/serial.c
new file mode 100644
index 0000000..0690300
--- /dev/null
+++ b/cpu/mpc8xx/serial.c
@@ -0,0 +1,640 @@
+/*
+ * (C) Copyright 2000
+ * 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
+ */
+
+#include <common.h>
+#include <commproc.h>
+#include <command.h>
+
+#if !defined(CONFIG_8xx_CONS_NONE)	/* No Console at all */
+
+#if defined(CONFIG_8xx_CONS_SMC1)	/* Console on SMC1 */
+#define	SMC_INDEX	0
+#undef 	SCC_INDEX
+#define PROFF_SMC	PROFF_SMC1
+#define CPM_CR_CH_SMC	CPM_CR_CH_SMC1
+
+#elif defined(CONFIG_8xx_CONS_SMC2)	/* Console on SMC2 */
+#define SMC_INDEX	1
+#undef 	SCC_INDEX
+#define PROFF_SMC	PROFF_SMC2
+#define CPM_CR_CH_SMC	CPM_CR_CH_SMC2
+
+#elif defined(CONFIG_8xx_CONS_SCC1)	/* Console on SCC1 */
+#undef  SMC_INDEX
+#define SCC_INDEX	0
+#define PROFF_SCC	PROFF_SCC1
+#define CPM_CR_CH_SCC	CPM_CR_CH_SCC1
+
+#elif defined(CONFIG_8xx_CONS_SCC2)	/* Console on SCC2 */
+#undef  SMC_INDEX
+#define SCC_INDEX	1
+#define PROFF_SCC	PROFF_SCC2
+#define CPM_CR_CH_SCC	CPM_CR_CH_SCC2
+
+#elif defined(CONFIG_8xx_CONS_SCC3)	/* Console on SCC3 */
+#undef  SMC_INDEX
+#define SCC_INDEX	2
+#define PROFF_SCC	PROFF_SCC3
+#define CPM_CR_CH_SCC	CPM_CR_CH_SCC3
+
+#elif defined(CONFIG_8xx_CONS_SCC4)	/* Console on SCC4 */
+#undef  SMC_INDEX
+#define SCC_INDEX	3
+#define PROFF_SCC	PROFF_SCC4
+#define CPM_CR_CH_SCC	CPM_CR_CH_SCC4
+
+#else /* CONFIG_8xx_CONS_? */
+#error "console not correctly defined"
+#endif
+
+#if (defined (CONFIG_8xx_CONS_SMC1) || defined (CONFIG_8xx_CONS_SMC2))
+
+/*
+ * Minimal serial functions needed to use one of the SMC ports
+ * as serial console interface.
+ */
+
+int serial_init (void)
+{
+        volatile immap_t *im = (immap_t *)CFG_IMMR;
+	volatile smc_t *sp;
+	volatile smc_uart_t *up;
+	volatile cbd_t *tbdf, *rbdf;
+	volatile cpm8xx_t *cp = &(im->im_cpm);
+#if (!defined(CONFIG_8xx_CONS_SMC1)) && (defined(CONFIG_MPC823) || defined(CONFIG_MPC850))
+	volatile iop8xx_t *ip = (iop8xx_t *)&(im->im_ioport);
+#endif
+	uint	dpaddr;
+
+	/* initialize pointers to SMC */
+
+	sp = (smc_t *) &(cp->cp_smc[SMC_INDEX]);
+	up = (smc_uart_t *) &cp->cp_dparam[PROFF_SMC];
+
+	/* Disable transmitter/receiver.
+	*/
+	sp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
+
+	/* Enable SDMA.
+	*/
+	im->im_siu_conf.sc_sdcr = 1;
+
+	/* clear error conditions */
+#ifdef	CFG_SDSR
+	im->im_sdma.sdma_sdsr = CFG_SDSR;
+#else
+	im->im_sdma.sdma_sdsr = 0x83;
+#endif
+
+	/* clear SDMA interrupt mask */
+#ifdef	CFG_SDMR
+	im->im_sdma.sdma_sdmr = CFG_SDMR;
+#else
+	im->im_sdma.sdma_sdmr = 0x00;
+#endif
+
+#if defined(CONFIG_8xx_CONS_SMC1)
+	/* Use Port B for SMC1 instead of other functions.
+	*/
+	cp->cp_pbpar |=  0x000000c0;
+	cp->cp_pbdir &= ~0x000000c0;
+	cp->cp_pbodr &= ~0x000000c0;
+#else	/* CONFIG_8xx_CONS_SMC2 */
+# if defined(CONFIG_MPC823) || defined(CONFIG_MPC850)
+	/* Use Port A for SMC2 instead of other functions.
+	*/
+	ip->iop_papar |=  0x00c0;
+	ip->iop_padir &= ~0x00c0;
+	ip->iop_paodr &= ~0x00c0;
+# else	/* must be a 860 then */
+	/* Use Port B for SMC2 instead of other functions.
+	*/
+	cp->cp_pbpar |=  0x00000c00;
+	cp->cp_pbdir &= ~0x00000c00;
+	cp->cp_pbodr &= ~0x00000c00;
+# endif
+#endif
+
+#if defined(CONFIG_FADS)
+	/* Enable RS232 */
+#if defined(CONFIG_8xx_CONS_SMC1)
+	*((uint *) BCSR1) &= ~BCSR1_RS232EN_1;
+#else
+	*((uint *) BCSR1) &= ~BCSR1_RS232EN_2;
+#endif
+#endif	/* CONFIG_FADS */
+
+#if defined(CONFIG_RPXLITE) || defined(CONFIG_RPXCLASSIC)
+	/* Enable Monitor Port Transceiver */
+	*((uchar *) BCSR0) |= BCSR0_ENMONXCVR ;
+#endif /* CONFIG_RPXLITE */
+
+	/* Set the physical address of the host memory buffers in
+	 * the buffer descriptors.
+	 */
+
+#ifdef CFG_ALLOC_DPRAM
+	dpaddr = dpram_alloc_align (sizeof(cbd_t)*2 + 2, 8) ;
+#else
+	dpaddr = CPM_SERIAL_BASE ;
+#endif
+
+	/* Allocate space for two buffer descriptors in the DP ram.
+	 * For now, this address seems OK, but it may have to
+	 * change with newer versions of the firmware.
+	 * damm: allocating space after the two buffers for rx/tx data
+	 */
+
+	rbdf = (cbd_t *)&cp->cp_dpmem[dpaddr];
+	rbdf->cbd_bufaddr = (uint) (rbdf+2);
+	rbdf->cbd_sc = 0;
+	tbdf = rbdf + 1;
+	tbdf->cbd_bufaddr = ((uint) (rbdf+2)) + 1;
+	tbdf->cbd_sc = 0;
+
+	/* Set up the uart parameters in the parameter ram.
+	*/
+	up->smc_rbase = dpaddr;
+	up->smc_tbase = dpaddr+sizeof(cbd_t);
+	up->smc_rfcr = SMC_EB;
+	up->smc_tfcr = SMC_EB;
+
+#if defined(CONFIG_MBX)
+	board_serial_init();
+#endif	/* CONFIG_MBX */
+
+	/* Set UART mode, 8 bit, no parity, one stop.
+	 * Enable receive and transmit.
+	 */
+	sp->smc_smcmr = smcr_mk_clen(9) |  SMCMR_SM_UART;
+
+	/* Mask all interrupts and remove anything pending.
+	*/
+	sp->smc_smcm = 0;
+	sp->smc_smce = 0xff;
+
+	/* Set up the baud rate generator.
+	*/
+	serial_setbrg ();
+
+	/* Make the first buffer the only buffer.
+	*/
+	tbdf->cbd_sc |= BD_SC_WRAP;
+	rbdf->cbd_sc |= BD_SC_EMPTY | BD_SC_WRAP;
+
+	/* Single character receive.
+	*/
+	up->smc_mrblr = 1;
+	up->smc_maxidl = 0;
+
+	/* Initialize Tx/Rx parameters.
+	*/
+
+	while (cp->cp_cpcr & CPM_CR_FLG)  /* wait if cp is busy */
+	  ;
+
+	cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SMC, CPM_CR_INIT_TRX) | CPM_CR_FLG;
+
+	while (cp->cp_cpcr & CPM_CR_FLG)  /* wait if cp is busy */
+	  ;
+
+	/* Enable transmitter/receiver.
+	*/
+	sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN;
+
+	return (0);
+}
+
+void
+serial_setbrg (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+        volatile immap_t *im = (immap_t *)CFG_IMMR;
+	volatile cpm8xx_t *cp = &(im->im_cpm);
+
+	/* Set up the baud rate generator.
+	 * See 8xx_io/commproc.c for details.
+	 *
+	 * Wire BRG1 to SMCx
+	 */
+
+	cp->cp_simode = 0x00000000;
+
+	cp->cp_brgc1 =
+		(((gd->cpu_clk / 16 / gd->baudrate)-1) << 1) | CPM_BRG_EN;
+}
+
+void
+serial_putc(const char c)
+{
+	volatile cbd_t		*tbdf;
+	volatile char		*buf;
+	volatile smc_uart_t	*up;
+        volatile immap_t	*im = (immap_t *)CFG_IMMR;
+	volatile cpm8xx_t	*cpmp = &(im->im_cpm);
+
+	if (c == '\n')
+		serial_putc ('\r');
+
+	up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC];
+
+	tbdf = (cbd_t *)&cpmp->cp_dpmem[up->smc_tbase];
+
+	/* Wait for last character to go.
+	*/
+
+	buf = (char *)tbdf->cbd_bufaddr;
+#if 0
+	__asm__("eieio");
+	while (tbdf->cbd_sc & BD_SC_READY)
+		__asm__("eieio");
+#endif
+
+	*buf = c;
+	tbdf->cbd_datlen = 1;
+	tbdf->cbd_sc |= BD_SC_READY;
+	__asm__("eieio");
+#if 1
+	while (tbdf->cbd_sc & BD_SC_READY)
+		__asm__("eieio");
+#endif
+}
+
+int
+serial_getc(void)
+{
+	volatile cbd_t		*rbdf;
+	volatile unsigned char	*buf;
+	volatile smc_uart_t	*up;
+        volatile immap_t	*im = (immap_t *)CFG_IMMR;
+	volatile cpm8xx_t	*cpmp = &(im->im_cpm);
+	unsigned char		c;
+
+	up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC];
+
+	rbdf = (cbd_t *)&cpmp->cp_dpmem[up->smc_rbase];
+
+	/* Wait for character to show up.
+	*/
+	buf = (unsigned char *)rbdf->cbd_bufaddr;
+	while (rbdf->cbd_sc & BD_SC_EMPTY)
+		;
+	c = *buf;
+	rbdf->cbd_sc |= BD_SC_EMPTY;
+
+	return(c);
+}
+
+int
+serial_tstc()
+{
+	volatile cbd_t		*rbdf;
+	volatile smc_uart_t	*up;
+        volatile immap_t	*im = (immap_t *)CFG_IMMR;
+	volatile cpm8xx_t	*cpmp = &(im->im_cpm);
+
+	up = (smc_uart_t *)&cpmp->cp_dparam[PROFF_SMC];
+
+	rbdf = (cbd_t *)&cpmp->cp_dpmem[up->smc_rbase];
+
+	return(!(rbdf->cbd_sc & BD_SC_EMPTY));
+}
+
+#else	/* ! CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2 */
+
+int serial_init (void)
+{
+        volatile immap_t *im = (immap_t *)CFG_IMMR;
+	volatile scc_t *sp;
+	volatile scc_uart_t *up;
+	volatile cbd_t *tbdf, *rbdf;
+	volatile cpm8xx_t *cp = &(im->im_cpm);
+	uint	 dpaddr;
+#if (SCC_INDEX != 2) || !defined(CONFIG_MPC850)
+	volatile iop8xx_t *ip = (iop8xx_t *)&(im->im_ioport);
+#endif
+
+	/* initialize pointers to SCC */
+
+	sp = (scc_t *) &(cp->cp_scc[SCC_INDEX]);
+	up = (scc_uart_t *) &cp->cp_dparam[PROFF_SCC];
+
+#if defined(CONFIG_LWMON) && defined(CONFIG_8xx_CONS_SCC2)
+    {	/* Disable Ethernet, enable Serial */
+	uchar c;
+
+	c = pic_read  (0x61);
+	c &= ~0x40;	/* enable COM3 */
+	c |=  0x80;	/* disable Ethernet */
+	pic_write (0x61, c);
+
+	/* enable RTS2 */
+	cp->cp_pbpar |=  0x2000;
+	cp->cp_pbdat |=  0x2000;
+	cp->cp_pbdir |=  0x2000;
+    }
+#endif	/* CONFIG_LWMON */
+
+	/* Disable transmitter/receiver.
+	*/
+	sp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
+
+#if (SCC_INDEX == 2) && defined(CONFIG_MPC850)
+	/*
+	 * The MPC850 has SCC3 on Port B
+	 */
+	cp->cp_pbpar |=  0x06;
+	cp->cp_pbdir &= ~0x06;
+	cp->cp_pbodr &= ~0x06;
+
+#elif (SCC_INDEX < 2) || !defined(CONFIG_IP860)
+	/*
+	 * Standard configuration for SCC's is on Part A
+	 */
+	ip->iop_papar |=  ((3 << (2 * SCC_INDEX)));
+	ip->iop_padir &= ~((3 << (2 * SCC_INDEX)));
+	ip->iop_paodr &= ~((3 << (2 * SCC_INDEX)));
+#else
+	/*
+	 * The IP860 has SCC3 and SCC4 on Port D
+	 */
+	ip->iop_pdpar |=  ((3 << (2 * SCC_INDEX)));
+#endif
+
+	/* Allocate space for two buffer descriptors in the DP ram.
+	 */
+
+#ifdef CFG_ALLOC_DPRAM
+	dpaddr = dpram_alloc_align (sizeof(cbd_t)*2 + 2, 8) ;
+#else
+	dpaddr = CPM_SERIAL_BASE ;
+#endif
+
+	/* Enable SDMA.
+	*/
+	im->im_siu_conf.sc_sdcr = 0x0001;
+
+	/* Set the physical address of the host memory buffers in
+	 * the buffer descriptors.
+	 */
+
+	rbdf = (cbd_t *)&cp->cp_dpmem[dpaddr];
+	rbdf->cbd_bufaddr = (uint) (rbdf+2);
+	rbdf->cbd_sc = 0;
+	tbdf = rbdf + 1;
+	tbdf->cbd_bufaddr = ((uint) (rbdf+2)) + 1;
+	tbdf->cbd_sc = 0;
+
+	/* Set up the baud rate generator.
+	*/
+	serial_setbrg ();
+
+	/* Set up the uart parameters in the parameter ram.
+	*/
+	up->scc_genscc.scc_rbase = dpaddr;
+	up->scc_genscc.scc_tbase = dpaddr+sizeof(cbd_t);
+
+	/* Initialize Tx/Rx parameters.
+	*/
+	while (cp->cp_cpcr & CPM_CR_FLG)  /* wait if cp is busy */
+		;
+	cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_SCC, CPM_CR_INIT_TRX) | CPM_CR_FLG;
+
+	while (cp->cp_cpcr & CPM_CR_FLG)  /* wait if cp is busy */
+		;
+
+	up->scc_genscc.scc_rfcr  = SCC_EB | 0x05;
+	up->scc_genscc.scc_tfcr  = SCC_EB | 0x05;
+
+	up->scc_genscc.scc_mrblr = 1;	/* Single character receive */
+	up->scc_maxidl = 0;		/* disable max idle */
+	up->scc_brkcr  = 1;		/* send one break character on stop TX */
+	up->scc_parec  = 0;
+	up->scc_frmec  = 0;
+	up->scc_nosec  = 0;
+	up->scc_brkec  = 0;
+	up->scc_uaddr1 = 0;
+	up->scc_uaddr2 = 0;
+	up->scc_toseq  = 0;
+	up->scc_char1  = 0x8000;
+	up->scc_char2  = 0x8000;
+	up->scc_char3  = 0x8000;
+	up->scc_char4  = 0x8000;
+	up->scc_char5  = 0x8000;
+	up->scc_char6  = 0x8000;
+	up->scc_char7  = 0x8000;
+	up->scc_char8  = 0x8000;
+	up->scc_rccm   = 0xc0ff;
+
+	/* Set low latency / small fifo.
+	 */
+	sp->scc_gsmrh = SCC_GSMRH_RFW;
+
+	/* Set SCC(x) clock mode to 16x
+	 * See 8xx_io/commproc.c for details.
+	 *
+	 * Wire BRG1 to SCCn
+	 */
+
+	/* Set UART mode, clock divider 16 on Tx and Rx
+	 */
+	sp->scc_gsmrl |=
+		(SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);
+
+	sp->scc_psmr  |= SCU_PSMR_CL;
+
+	/* Mask all interrupts and remove anything pending.
+	*/
+	sp->scc_sccm = 0;
+	sp->scc_scce = 0xffff;
+	sp->scc_dsr  = 0x7e7e;
+	sp->scc_psmr = 0x3000;
+
+	/* Make the first buffer the only buffer.
+	*/
+	tbdf->cbd_sc |= BD_SC_WRAP;
+	rbdf->cbd_sc |= BD_SC_EMPTY | BD_SC_WRAP;
+
+	/* Enable transmitter/receiver.
+	*/
+	sp->scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
+
+	return (0);
+}
+
+void
+serial_setbrg (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+        volatile immap_t *im = (immap_t *)CFG_IMMR;
+	volatile cpm8xx_t *cp = &(im->im_cpm);
+
+	/* Set up the baud rate generator.
+	 * See 8xx_io/commproc.c for details.
+	 *
+	 * Wire BRG1 to SCCx
+	 */
+
+	cp->cp_sicr &= ~(0x000000FF << (8 * SCC_INDEX));
+	/* no |= needed, since BRG1 is 000 */
+
+	cp->cp_brgc1 =
+		(((gd->cpu_clk / 16 / gd->baudrate)-1) << 1) | CPM_BRG_EN;
+}
+
+void
+serial_putc(const char c)
+{
+	volatile cbd_t		*tbdf;
+	volatile char		*buf;
+	volatile scc_uart_t	*up;
+        volatile immap_t	*im = (immap_t *)CFG_IMMR;
+	volatile cpm8xx_t	*cpmp = &(im->im_cpm);
+
+	if (c == '\n')
+		serial_putc ('\r');
+
+	up = (scc_uart_t *)&cpmp->cp_dparam[PROFF_SCC];
+
+	tbdf = (cbd_t *)&cpmp->cp_dpmem[up->scc_genscc.scc_tbase];
+
+	/* Wait for last character to go.
+	*/
+
+	buf = (char *)tbdf->cbd_bufaddr;
+#if 0
+	__asm__("eieio");
+	while (tbdf->cbd_sc & BD_SC_READY)
+		__asm__("eieio");
+#endif
+
+	*buf = c;
+	tbdf->cbd_datlen = 1;
+	tbdf->cbd_sc |= BD_SC_READY;
+	__asm__("eieio");
+#if 1
+	while (tbdf->cbd_sc & BD_SC_READY)
+		__asm__("eieio");
+#endif
+}
+
+int
+serial_getc(void)
+{
+	volatile cbd_t		*rbdf;
+	volatile unsigned char	*buf;
+	volatile scc_uart_t	*up;
+        volatile immap_t	*im = (immap_t *)CFG_IMMR;
+	volatile cpm8xx_t	*cpmp = &(im->im_cpm);
+	unsigned char		c;
+
+	up = (scc_uart_t *)&cpmp->cp_dparam[PROFF_SCC];
+
+	rbdf = (cbd_t *)&cpmp->cp_dpmem[up->scc_genscc.scc_rbase];
+
+	/* Wait for character to show up.
+	*/
+	buf = (unsigned char *)rbdf->cbd_bufaddr;
+	while (rbdf->cbd_sc & BD_SC_EMPTY)
+		;
+	c = *buf;
+	rbdf->cbd_sc |= BD_SC_EMPTY;
+
+	return(c);
+}
+
+int
+serial_tstc()
+{
+	volatile cbd_t		*rbdf;
+	volatile scc_uart_t	*up;
+        volatile immap_t	*im = (immap_t *)CFG_IMMR;
+	volatile cpm8xx_t	*cpmp = &(im->im_cpm);
+
+	up = (scc_uart_t *)&cpmp->cp_dparam[PROFF_SCC];
+
+	rbdf = (cbd_t *)&cpmp->cp_dpmem[up->scc_genscc.scc_rbase];
+
+	return(!(rbdf->cbd_sc & BD_SC_EMPTY));
+}
+
+#endif	/* CONFIG_8xx_CONS_SMC1, CONFIG_8xx_CONS_SMC2 */
+
+
+void
+serial_puts (const char *s)
+{
+	while (*s) {
+		serial_putc (*s++);
+	}
+}
+
+
+#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
+
+void
+kgdb_serial_init(void)
+{
+#if defined(CONFIG_8xx_CONS_SMC1)
+	serial_printf("[on SMC1] ");
+#elif defined(CONFIG_8xx_CONS_SMC2)
+	serial_printf("[on SMC2] ");
+#elif defined(CONFIG_8xx_CONS_SCC1)
+	serial_printf("[on SCC1] ");
+#elif defined(CONFIG_8xx_CONS_SCC2)
+	serial_printf("[on SCC2] ");
+#elif defined(CONFIG_8xx_CONS_SCC3)
+	serial_printf("[on SCC3] ");
+#elif defined(CONFIG_8xx_CONS_SCC4)
+	serial_printf("[on SCC4] ");
+#endif
+}
+
+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	/* CFG_CMD_KGDB	*/
+
+#endif	/* CONFIG_8xx_CONS_NONE */