CPCI750 board support added

1 files changed, 1018 insertions, 0 deletions

diff --git a/board/esd/cpci750/mpsc.c b/board/esd/cpci750/mpsc.c
new file mode 100644
index 0000000..52398b2
--- /dev/null
+++ b/board/esd/cpci750/mpsc.c
@@ -0,0 +1,1018 @@
+/*
+ * (C) Copyright 2001
+ * John Clemens <clemens@mclx.com>, Mission Critical Linux, Inc.
+ *
+ * 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
+ */
+
+/*************************************************************************
+ * changes for Marvell DB64360 eval board 2003 by Ingo Assmus <ingo.assmus@keymile.com>
+ *
+  ************************************************************************/
+
+/*
+ * mpsc.c - driver for console over the MPSC.
+ */
+
+
+#include <common.h>
+#include <config.h>
+#include <asm/cache.h>
+
+#include <malloc.h>
+#include "mpsc.h"
+
+#include "mv_regs.h"
+
+#include "../../Marvell/include/memory.h"
+
+/* Define this if you wish to use the MPSC as a register based UART.
+ * This will force the serial port to not use the SDMA engine at all.
+ */
+
+#undef CONFIG_MPSC_DEBUG_PORT
+
+
+int (*mpsc_putchar) (char ch) = mpsc_putchar_early;
+char (*mpsc_getchar) (void) = mpsc_getchar_debug;
+int (*mpsc_test_char) (void) = mpsc_test_char_debug;
+
+
+static volatile unsigned int *rx_desc_base = NULL;
+static unsigned int rx_desc_index = 0;
+static volatile unsigned int *tx_desc_base = NULL;
+static unsigned int tx_desc_index = 0;
+
+/* local function declarations */
+static int galmpsc_connect (int channel, int connect);
+static int galmpsc_route_rx_clock (int channel, int brg);
+static int galmpsc_route_tx_clock (int channel, int brg);
+static int galmpsc_write_config_regs (int mpsc, int mode);
+static int galmpsc_config_channel_regs (int mpsc);
+static int galmpsc_set_char_length (int mpsc, int value);
+static int galmpsc_set_stop_bit_length (int mpsc, int value);
+static int galmpsc_set_parity (int mpsc, int value);
+static int galmpsc_enter_hunt (int mpsc);
+static int galmpsc_set_brkcnt (int mpsc, int value);
+static int galmpsc_set_tcschar (int mpsc, int value);
+static int galmpsc_set_snoop (int mpsc, int value);
+static int galmpsc_shutdown (int mpsc);
+
+static int galsdma_set_RFT (int channel);
+static int galsdma_set_SFM (int channel);
+static int galsdma_set_rxle (int channel);
+static int galsdma_set_txle (int channel);
+static int galsdma_set_burstsize (int channel, unsigned int value);
+static int galsdma_set_RC (int channel, unsigned int value);
+
+static int galbrg_set_CDV (int channel, int value);
+static int galbrg_enable (int channel);
+static int galbrg_disable (int channel);
+static int galbrg_set_clksrc (int channel, int value);
+static int galbrg_set_CUV (int channel, int value);
+
+static void galsdma_enable_rx (void);
+static int galsdma_set_mem_space (unsigned int memSpace,
+				  unsigned int memSpaceTarget,
+				  unsigned int memSpaceAttr,
+				  unsigned int baseAddress,
+				  unsigned int size);
+
+
+#define SOFTWARE_CACHE_MANAGEMENT
+
+#ifdef SOFTWARE_CACHE_MANAGEMENT
+#define FLUSH_DCACHE(a,b)		 if(dcache_status()){clean_dcache_range((u32)(a),(u32)(b));}
+#define FLUSH_AND_INVALIDATE_DCACHE(a,b) if(dcache_status()){flush_dcache_range((u32)(a),(u32)(b));}
+#define INVALIDATE_DCACHE(a,b)		 if(dcache_status()){invalidate_dcache_range((u32)(a),(u32)(b));}
+#else
+#define FLUSH_DCACHE(a,b)
+#define FLUSH_AND_INVALIDATE_DCACHE(a,b)
+#define INVALIDATE_DCACHE(a,b)
+#endif
+
+#ifdef CONFIG_MPSC_DEBUG_PORT
+static void mpsc_debug_init (void)
+{
+
+	volatile unsigned int temp;
+
+	/* Clear the CFR  (CHR4) */
+	/* Write random 'Z' bit (bit 29) of CHR4 to enable debug uart *UNDOCUMENTED FEATURE* */
+	temp = GTREGREAD (GALMPSC_CHANNELREG_4 + (CHANNEL * GALMPSC_REG_GAP));
+	temp &= 0xffffff00;
+	temp |= BIT29;
+	GT_REG_WRITE (GALMPSC_CHANNELREG_4 + (CHANNEL * GALMPSC_REG_GAP),
+		      temp);
+
+	/* Set the Valid bit 'V' (bit 12) and int generation bit 'INT' (bit 15) */
+	temp = GTREGREAD (GALMPSC_CHANNELREG_5 + (CHANNEL * GALMPSC_REG_GAP));
+	temp |= (BIT12 | BIT15);
+	GT_REG_WRITE (GALMPSC_CHANNELREG_5 + (CHANNEL * GALMPSC_REG_GAP),
+		      temp);
+
+	/* Set int mask */
+	temp = GTREGREAD (GALMPSC_0_INT_MASK);
+	temp |= BIT6;
+	GT_REG_WRITE (GALMPSC_0_INT_MASK, temp);
+}
+#endif
+
+char mpsc_getchar_debug (void)
+{
+	volatile int temp;
+	volatile unsigned int cause;
+
+	cause = GTREGREAD (GALMPSC_0_INT_CAUSE);
+	while ((cause & BIT6) == 0) {
+		cause = GTREGREAD (GALMPSC_0_INT_CAUSE);
+	}
+
+	temp = GTREGREAD (GALMPSC_CHANNELREG_10 +
+			  (CHANNEL * GALMPSC_REG_GAP));
+	/* By writing 1's to the set bits, the register is cleared */
+	GT_REG_WRITE (GALMPSC_CHANNELREG_10 + (CHANNEL * GALMPSC_REG_GAP),
+		      temp);
+	GT_REG_WRITE (GALMPSC_0_INT_CAUSE, cause & ~BIT6);
+	return (temp >> 16) & 0xff;
+}
+
+/* special function for running out of flash.  doesn't modify any
+ * global variables [josh] */
+int mpsc_putchar_early (char ch)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	int mpsc = CHANNEL;
+	int temp =
+		GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP));
+	galmpsc_set_tcschar (mpsc, ch);
+	GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP),
+		      temp | 0x200);
+
+#define MAGIC_FACTOR	(10*1000000)
+
+	udelay (MAGIC_FACTOR / gd->baudrate);
+	return 0;
+}
+
+/* This is used after relocation, see serial.c and mpsc_init2 */
+static int mpsc_putchar_sdma (char ch)
+{
+	volatile unsigned int *p;
+	unsigned int temp;
+
+
+	/* align the descriptor */
+	p = tx_desc_base;
+	memset ((void *) p, 0, 8 * sizeof (unsigned int));
+
+	/* fill one 64 bit buffer */
+	/* word swap, pad with 0 */
+	p[4] = 0;		/* x */
+	p[5] = (unsigned int) ch;	/* x */
+
+	/* CHANGED completely according to GT64260A dox - NTL */
+	p[0] = 0x00010001;	/* 0 */
+	p[1] = DESC_OWNER_BIT | DESC_FIRST | DESC_LAST;	/* 4 */
+	p[2] = 0;		/* 8 */
+	p[3] = (unsigned int) &p[4];	/* c */
+
+#if 0
+	p[9] = DESC_FIRST | DESC_LAST;
+	p[10] = (unsigned int) &p[0];
+	p[11] = (unsigned int) &p[12];
+#endif
+
+	FLUSH_DCACHE (&p[0], &p[8]);
+
+	GT_REG_WRITE (GALSDMA_0_CUR_TX_PTR + (CHANNEL * GALSDMA_REG_DIFF),
+		      (unsigned int) &p[0]);
+	GT_REG_WRITE (GALSDMA_0_FIR_TX_PTR + (CHANNEL * GALSDMA_REG_DIFF),
+		      (unsigned int) &p[0]);
+
+	temp = GTREGREAD (GALSDMA_0_COM_REG + (CHANNEL * GALSDMA_REG_DIFF));
+	temp |= (TX_DEMAND | TX_STOP);
+	GT_REG_WRITE (GALSDMA_0_COM_REG + (CHANNEL * GALSDMA_REG_DIFF), temp);
+
+	INVALIDATE_DCACHE (&p[1], &p[2]);
+
+	while (p[1] & DESC_OWNER_BIT) {
+		udelay (100);
+		INVALIDATE_DCACHE (&p[1], &p[2]);
+	}
+	return 0;
+}
+
+char mpsc_getchar_sdma (void)
+{
+	static unsigned int done = 0;
+	volatile char ch;
+	unsigned int len = 0, idx = 0, temp;
+
+	volatile unsigned int *p;
+
+
+	do {
+		p = &rx_desc_base[rx_desc_index * 8];
+
+		INVALIDATE_DCACHE (&p[0], &p[1]);
+		/* Wait for character */
+		while (p[1] & DESC_OWNER_BIT) {
+			udelay (100);
+			INVALIDATE_DCACHE (&p[0], &p[1]);
+		}
+
+		/* Handle error case */
+		if (p[1] & (1 << 15)) {
+			printf ("oops, error: %08x\n", p[1]);
+
+			temp = GTREGREAD (GALMPSC_CHANNELREG_2 +
+					  (CHANNEL * GALMPSC_REG_GAP));
+			temp |= (1 << 23);
+			GT_REG_WRITE (GALMPSC_CHANNELREG_2 +
+				      (CHANNEL * GALMPSC_REG_GAP), temp);
+
+			/* Can't poll on abort bit, so we just wait. */
+			udelay (100);
+
+			galsdma_enable_rx ();
+		}
+
+		/* Number of bytes left in this descriptor */
+		len = p[0] & 0xffff;
+
+		if (len) {
+			/* Where to look */
+			idx = 5;
+			if (done > 3)
+				idx = 4;
+			if (done > 7)
+				idx = 7;
+			if (done > 11)
+				idx = 6;
+
+			INVALIDATE_DCACHE (&p[idx], &p[idx + 1]);
+			ch = p[idx] & 0xff;
+			done++;
+		}
+
+		if (done < len) {
+			/* this descriptor has more bytes still
+			 * shift down the char we just read, and leave the
+			 * buffer in place for the next time around
+			 */
+			p[idx] = p[idx] >> 8;
+			FLUSH_DCACHE (&p[idx], &p[idx + 1]);
+		}
+
+		if (done == len) {
+			/* nothing left in this descriptor.
+			 * go to next one
+			 */
+			p[1] = DESC_OWNER_BIT | DESC_FIRST | DESC_LAST;
+			p[0] = 0x00100000;
+			FLUSH_DCACHE (&p[0], &p[1]);
+			/* Next descriptor */
+			rx_desc_index = (rx_desc_index + 1) % RX_DESC;
+			done = 0;
+		}
+	} while (len == 0);	/* galileo bug.. len might be zero */
+
+	return ch;
+}
+
+
+int mpsc_test_char_debug (void)
+{
+	if ((GTREGREAD (GALMPSC_0_INT_CAUSE) & BIT6) == 0)
+		return 0;
+	else {
+		return 1;
+	}
+}
+
+
+int mpsc_test_char_sdma (void)
+{
+	volatile unsigned int *p = &rx_desc_base[rx_desc_index * 8];
+
+	INVALIDATE_DCACHE (&p[1], &p[2]);
+
+	if (p[1] & DESC_OWNER_BIT)
+		return 0;
+	else
+		return 1;
+}
+
+int mpsc_init (int baud)
+{
+	/* BRG CONFIG */
+	galbrg_set_baudrate (CHANNEL, baud);
+	galbrg_set_clksrc (CHANNEL, 8);	/* set source=Tclk */
+	galbrg_set_CUV (CHANNEL, 0);	/* set up CountUpValue */
+	galbrg_enable (CHANNEL);	/* Enable BRG */
+
+	/* Set up clock routing */
+	galmpsc_connect (CHANNEL, GALMPSC_CONNECT);	/* connect it */
+
+	galmpsc_route_rx_clock (CHANNEL, CHANNEL);	/* chosse BRG0 for Rx */
+	galmpsc_route_tx_clock (CHANNEL, CHANNEL);	/* chose BRG0 for Tx */
+
+	/* reset MPSC state */
+	galmpsc_shutdown (CHANNEL);
+
+	/* SDMA CONFIG */
+	galsdma_set_burstsize (CHANNEL, L1_CACHE_BYTES / 8);	/* in 64 bit words (8 bytes) */
+	galsdma_set_txle (CHANNEL);
+	galsdma_set_rxle (CHANNEL);
+	galsdma_set_RC (CHANNEL, 0xf);
+	galsdma_set_SFM (CHANNEL);
+	galsdma_set_RFT (CHANNEL);
+
+	/* MPSC CONFIG */
+	galmpsc_write_config_regs (CHANNEL, GALMPSC_UART);
+	galmpsc_config_channel_regs (CHANNEL);
+	galmpsc_set_char_length (CHANNEL, GALMPSC_CHAR_LENGTH_8);	/* 8 */
+	galmpsc_set_parity (CHANNEL, GALMPSC_PARITY_NONE);	/* N */
+	galmpsc_set_stop_bit_length (CHANNEL, GALMPSC_STOP_BITS_1);	/* 1 */
+
+#ifdef CONFIG_MPSC_DEBUG_PORT
+	mpsc_debug_init ();
+#endif
+
+	/* COMM_MPSC CONFIG */
+#ifdef SOFTWARE_CACHE_MANAGEMENT
+	galmpsc_set_snoop (CHANNEL, 0);	/* disable snoop */
+#else
+	galmpsc_set_snoop (CHANNEL, 1);	/* enable snoop */
+#endif
+
+	return 0;
+}
+
+
+void mpsc_sdma_init (void)
+{
+/* Setup SDMA channel0 SDMA_CONFIG_REG*/
+	GT_REG_WRITE (SDMA_CONFIG_REG (0), 0x000020ff);
+
+/*  Enable MPSC-Window0 for DRAM Bank0   */
+	if (galsdma_set_mem_space (MV64360_CUNIT_BASE_ADDR_WIN_0_BIT,
+				   MV64360_SDMA_DRAM_CS_0_TARGET,
+				   0,
+				   memoryGetBankBaseAddress
+				   (CS_0_LOW_DECODE_ADDRESS),
+				   memoryGetBankSize (BANK0)) != true)
+		printf ("%s: SDMA_Window0 memory setup failed !!! \n",
+			__FUNCTION__);
+
+
+/*  Disable MPSC-Window1    */
+	if (galsdma_set_mem_space (MV64360_CUNIT_BASE_ADDR_WIN_1_BIT,
+				   MV64360_SDMA_DRAM_CS_0_TARGET,
+				   0,
+				   memoryGetBankBaseAddress
+				   (CS_1_LOW_DECODE_ADDRESS),
+				   memoryGetBankSize (BANK3)) != true)
+		printf ("%s: SDMA_Window1 memory setup failed !!! \n",
+			__FUNCTION__);
+
+
+/*  Disable MPSC-Window2 */
+	if (galsdma_set_mem_space (MV64360_CUNIT_BASE_ADDR_WIN_2_BIT,
+				   MV64360_SDMA_DRAM_CS_0_TARGET,
+				   0,
+				   memoryGetBankBaseAddress
+				   (CS_2_LOW_DECODE_ADDRESS),
+				   memoryGetBankSize (BANK3)) != true)
+		printf ("%s: SDMA_Window2 memory setup failed !!! \n",
+			__FUNCTION__);
+
+
+/*  Disable MPSC-Window3 */
+	if (galsdma_set_mem_space (MV64360_CUNIT_BASE_ADDR_WIN_3_BIT,
+				   MV64360_SDMA_DRAM_CS_0_TARGET,
+				   0,
+				   memoryGetBankBaseAddress
+				   (CS_3_LOW_DECODE_ADDRESS),
+				   memoryGetBankSize (BANK3)) != true)
+		printf ("%s: SDMA_Window3 memory setup failed !!! \n",
+			__FUNCTION__);
+
+/*  Setup MPSC0 access mode Window0 full access */
+	GT_SET_REG_BITS (MPSC0_ACCESS_PROTECTION_REG,
+			 (MV64360_SDMA_WIN_ACCESS_FULL <<
+			  (MV64360_CUNIT_BASE_ADDR_WIN_0_BIT * 2)));
+
+/*  Setup MPSC1 access mode Window1 full access */
+	GT_SET_REG_BITS (MPSC1_ACCESS_PROTECTION_REG,
+			 (MV64360_SDMA_WIN_ACCESS_FULL <<
+			  (MV64360_CUNIT_BASE_ADDR_WIN_0_BIT * 2)));
+
+/* Setup MPSC internal address space base address 	*/
+	GT_REG_WRITE (CUNIT_INTERNAL_SPACE_BASE_ADDR_REG, CFG_GT_REGS);
+
+/* no high address remap*/
+	GT_REG_WRITE (CUNIT_HIGH_ADDR_REMAP_REG0, 0x00);
+	GT_REG_WRITE (CUNIT_HIGH_ADDR_REMAP_REG1, 0x00);
+
+/* clear interrupt cause register for MPSC (fault register)*/
+	GT_REG_WRITE (CUNIT_INTERRUPT_CAUSE_REG, 0x00);
+}
+
+
+void mpsc_init2 (void)
+{
+	int i;
+
+#ifndef CONFIG_MPSC_DEBUG_PORT
+	mpsc_putchar = mpsc_putchar_sdma;
+	mpsc_getchar = mpsc_getchar_sdma;
+	mpsc_test_char = mpsc_test_char_sdma;
+#endif
+	/* RX descriptors */
+	rx_desc_base = (unsigned int *) malloc (((RX_DESC + 1) * 8) *
+						sizeof (unsigned int));
+
+	/* align descriptors */
+	rx_desc_base = (unsigned int *)
+		(((unsigned int) rx_desc_base + 32) & 0xFFFFFFF0);
+
+	rx_desc_index = 0;
+
+	memset ((void *) rx_desc_base, 0,
+		(RX_DESC * 8) * sizeof (unsigned int));
+
+	for (i = 0; i < RX_DESC; i++) {
+		rx_desc_base[i * 8 + 3] = (unsigned int) &rx_desc_base[i * 8 + 4];	/* Buffer */
+		rx_desc_base[i * 8 + 2] = (unsigned int) &rx_desc_base[(i + 1) * 8];	/* Next descriptor */
+		rx_desc_base[i * 8 + 1] = DESC_OWNER_BIT | DESC_FIRST | DESC_LAST;	/* Command & control */
+		rx_desc_base[i * 8] = 0x00100000;
+	}
+	rx_desc_base[(i - 1) * 8 + 2] = (unsigned int) &rx_desc_base[0];
+
+	FLUSH_DCACHE (&rx_desc_base[0], &rx_desc_base[RX_DESC * 8]);
+	GT_REG_WRITE (GALSDMA_0_CUR_RX_PTR + (CHANNEL * GALSDMA_REG_DIFF),
+		      (unsigned int) &rx_desc_base[0]);
+
+	/* TX descriptors */
+	tx_desc_base = (unsigned int *) malloc (((TX_DESC + 1) * 8) *
+						sizeof (unsigned int));
+
+	/* align descriptors */
+	tx_desc_base = (unsigned int *)
+		(((unsigned int) tx_desc_base + 32) & 0xFFFFFFF0);
+
+	tx_desc_index = -1;
+
+	memset ((void *) tx_desc_base, 0,
+		(TX_DESC * 8) * sizeof (unsigned int));
+
+	for (i = 0; i < TX_DESC; i++) {
+		tx_desc_base[i * 8 + 5] = (unsigned int) 0x23232323;
+		tx_desc_base[i * 8 + 4] = (unsigned int) 0x23232323;
+		tx_desc_base[i * 8 + 3] =
+			(unsigned int) &tx_desc_base[i * 8 + 4];
+		tx_desc_base[i * 8 + 2] =
+			(unsigned int) &tx_desc_base[(i + 1) * 8];
+		tx_desc_base[i * 8 + 1] =
+			DESC_OWNER_BIT | DESC_FIRST | DESC_LAST;
+
+		/* set sbytecnt and shadow byte cnt to 1 */
+		tx_desc_base[i * 8] = 0x00010001;
+	}
+	tx_desc_base[(i - 1) * 8 + 2] = (unsigned int) &tx_desc_base[0];
+
+	FLUSH_DCACHE (&tx_desc_base[0], &tx_desc_base[TX_DESC * 8]);
+
+	udelay (100);
+
+	galsdma_enable_rx ();
+
+	return;
+}
+
+int galbrg_set_baudrate (int channel, int rate)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	int clock;
+
+	galbrg_disable (channel);	/*ok */
+
+#ifdef ZUMA_NTL
+	/* from tclk */
+	clock = (CFG_TCLK / (16 * rate)) - 1;
+#else
+	clock = (CFG_TCLK / (16 * rate)) - 1;
+#endif
+
+	galbrg_set_CDV (channel, clock);	/* set timer Reg. for BRG */
+
+	galbrg_enable (channel);
+
+	gd->baudrate = rate;
+
+	return 0;
+}
+
+/* ------------------------------------------------------------------ */
+
+/* Below are all the private functions that no one else needs */
+
+static int galbrg_set_CDV (int channel, int value)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
+	temp &= 0xFFFF0000;
+	temp |= (value & 0x0000FFFF);
+	GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);
+
+	return 0;
+}
+
+static int galbrg_enable (int channel)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
+	temp |= 0x00010000;
+	GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);
+
+	return 0;
+}
+
+static int galbrg_disable (int channel)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
+	temp &= 0xFFFEFFFF;
+	GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);
+
+	return 0;
+}
+
+static int galbrg_set_clksrc (int channel, int value)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
+	temp &= 0xFFC3FFFF;	/* Bit 18 - 21 (MV 64260 18-22) */
+	temp |= (value << 18);
+	GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);
+	return 0;
+}
+
+static int galbrg_set_CUV (int channel, int value)
+{
+	/* set CountUpValue */
+	GT_REG_WRITE (GALBRG_0_BTREG + (channel * GALBRG_REG_GAP), value);
+
+	return 0;
+}
+
+#if 0
+static int galbrg_reset (int channel)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
+	temp |= 0x20000;
+	GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);
+
+	return 0;
+}
+#endif
+
+static int galsdma_set_RFT (int channel)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
+	temp |= 0x00000001;
+	GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
+		      temp);
+
+	return 0;
+}
+
+static int galsdma_set_SFM (int channel)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
+	temp |= 0x00000002;
+	GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
+		      temp);
+
+	return 0;
+}
+
+static int galsdma_set_rxle (int channel)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
+	temp |= 0x00000040;
+	GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
+		      temp);
+
+	return 0;
+}
+
+static int galsdma_set_txle (int channel)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
+	temp |= 0x00000080;
+	GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
+		      temp);
+
+	return 0;
+}
+
+static int galsdma_set_RC (int channel, unsigned int value)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
+	temp &= ~0x0000003c;
+	temp |= (value << 2);
+	GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
+		      temp);
+
+	return 0;
+}
+
+static int galsdma_set_burstsize (int channel, unsigned int value)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
+	temp &= 0xFFFFCFFF;
+	switch (value) {
+	case 8:
+		GT_REG_WRITE (GALSDMA_0_CONF_REG +
+			      (channel * GALSDMA_REG_DIFF),
+			      (temp | (0x3 << 12)));
+		break;
+
+	case 4:
+		GT_REG_WRITE (GALSDMA_0_CONF_REG +
+			      (channel * GALSDMA_REG_DIFF),
+			      (temp | (0x2 << 12)));
+		break;
+
+	case 2:
+		GT_REG_WRITE (GALSDMA_0_CONF_REG +
+			      (channel * GALSDMA_REG_DIFF),
+			      (temp | (0x1 << 12)));
+		break;
+
+	case 1:
+		GT_REG_WRITE (GALSDMA_0_CONF_REG +
+			      (channel * GALSDMA_REG_DIFF),
+			      (temp | (0x0 << 12)));
+		break;
+
+	default:
+		return -1;
+		break;
+	}
+
+	return 0;
+}
+
+static int galmpsc_connect (int channel, int connect)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALMPSC_ROUTING_REGISTER);
+
+	if ((channel == 0) && connect)
+		temp &= ~0x00000007;
+	else if ((channel == 1) && connect)
+		temp &= ~(0x00000007 << 6);
+	else if ((channel == 0) && !connect)
+		temp |= 0x00000007;
+	else
+		temp |= (0x00000007 << 6);
+
+	/* Just in case... */
+	temp &= 0x3fffffff;
+
+	GT_REG_WRITE (GALMPSC_ROUTING_REGISTER, temp);
+
+	return 0;
+}
+
+static int galmpsc_route_rx_clock (int channel, int brg)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALMPSC_RxC_ROUTE);
+
+	if (channel == 0) {
+		temp &= ~0x0000000F;
+		temp |= brg;
+	} else {
+		temp &= ~0x00000F00;
+		temp |= (brg << 8);
+	}
+
+	GT_REG_WRITE (GALMPSC_RxC_ROUTE, temp);
+
+	return 0;
+}
+
+static int galmpsc_route_tx_clock (int channel, int brg)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALMPSC_TxC_ROUTE);
+
+	if (channel == 0) {
+		temp &= ~0x0000000F;
+		temp |= brg;
+	} else {
+		temp &= ~0x00000F00;
+		temp |= (brg << 8);
+	}
+
+	GT_REG_WRITE (GALMPSC_TxC_ROUTE, temp);
+
+	return 0;
+}
+
+static int galmpsc_write_config_regs (int mpsc, int mode)
+{
+	if (mode == GALMPSC_UART) {
+		/* Main config reg Low (Null modem, Enable Tx/Rx, UART mode) */
+		GT_REG_WRITE (GALMPSC_MCONF_LOW + (mpsc * GALMPSC_REG_GAP),
+			      0x000004c4);
+
+		/* Main config reg High (32x Rx/Tx clock mode, width=8bits */
+		GT_REG_WRITE (GALMPSC_MCONF_HIGH + (mpsc * GALMPSC_REG_GAP),
+			      0x024003f8);
+		/*        22 2222 1111 */
+		/*        54 3210 9876 */
+		/* 0000 0010 0000 0000 */
+		/*       1 */
+		/*       098 7654 3210 */
+		/* 0000 0011 1111 1000 */
+	} else
+		return -1;
+
+	return 0;
+}
+
+static int galmpsc_config_channel_regs (int mpsc)
+{
+	GT_REG_WRITE (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP), 0);
+	GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP), 0);
+	GT_REG_WRITE (GALMPSC_CHANNELREG_3 + (mpsc * GALMPSC_REG_GAP), 1);
+	GT_REG_WRITE (GALMPSC_CHANNELREG_4 + (mpsc * GALMPSC_REG_GAP), 0);
+	GT_REG_WRITE (GALMPSC_CHANNELREG_5 + (mpsc * GALMPSC_REG_GAP), 0);
+	GT_REG_WRITE (GALMPSC_CHANNELREG_6 + (mpsc * GALMPSC_REG_GAP), 0);
+	GT_REG_WRITE (GALMPSC_CHANNELREG_7 + (mpsc * GALMPSC_REG_GAP), 0);
+	GT_REG_WRITE (GALMPSC_CHANNELREG_8 + (mpsc * GALMPSC_REG_GAP), 0);
+	GT_REG_WRITE (GALMPSC_CHANNELREG_9 + (mpsc * GALMPSC_REG_GAP), 0);
+	GT_REG_WRITE (GALMPSC_CHANNELREG_10 + (mpsc * GALMPSC_REG_GAP), 0);
+
+	galmpsc_set_brkcnt (mpsc, 0x3);
+	galmpsc_set_tcschar (mpsc, 0xab);
+
+	return 0;
+}
+
+static int galmpsc_set_brkcnt (int mpsc, int value)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP));
+	temp &= 0x0000FFFF;
+	temp |= (value << 16);
+	GT_REG_WRITE (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP), temp);
+
+	return 0;
+}
+
+static int galmpsc_set_tcschar (int mpsc, int value)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP));
+	temp &= 0xFFFF0000;
+	temp |= value;
+	GT_REG_WRITE (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP), temp);
+
+	return 0;
+}
+
+static int galmpsc_set_char_length (int mpsc, int value)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP));
+	temp &= 0xFFFFCFFF;
+	temp |= (value << 12);
+	GT_REG_WRITE (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP), temp);
+
+	return 0;
+}
+
+static int galmpsc_set_stop_bit_length (int mpsc, int value)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP));
+	temp &= 0xFFFFBFFF;
+	temp |= (value << 14);
+	GT_REG_WRITE (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP), temp);
+
+	return 0;
+}
+
+static int galmpsc_set_parity (int mpsc, int value)
+{
+	unsigned int temp;
+
+	temp = GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP));
+	if (value != -1) {
+		temp &= 0xFFF3FFF3;
+		temp |= ((value << 18) | (value << 2));
+		temp |= ((value << 17) | (value << 1));
+	} else {
+		temp &= 0xFFF1FFF1;
+	}
+
+	GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP), temp);
+
+	return 0;
+}
+
+static int galmpsc_enter_hunt (int mpsc)
+{
+	int temp;
+
+	temp = GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP));
+	temp |= 0x80000000;
+	GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP), temp);
+
+	while (GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP)) &
+	       MPSC_ENTER_HUNT) {
+		udelay (1);
+	}
+	return 0;
+}
+
+
+static int galmpsc_shutdown (int mpsc)
+{
+	unsigned int temp;
+
+	/* cause RX abort (clears RX) */
+	temp = GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP));
+	temp |= MPSC_RX_ABORT | MPSC_TX_ABORT;
+	temp &= ~MPSC_ENTER_HUNT;
+	GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP), temp);
+
+	GT_REG_WRITE (GALSDMA_0_COM_REG, 0);
+	GT_REG_WRITE (GALSDMA_0_COM_REG, SDMA_TX_ABORT | SDMA_RX_ABORT);
+
+	/* shut down the MPSC */
+	GT_REG_WRITE (GALMPSC_MCONF_LOW, 0);
+	GT_REG_WRITE (GALMPSC_MCONF_HIGH, 0);
+	GT_REG_WRITE (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP), 0);
+
+	udelay (100);
+
+	/* shut down the sdma engines. */
+	/* reset config to default */
+	GT_REG_WRITE (GALSDMA_0_CONF_REG, 0x000000fc);
+
+	udelay (100);
+
+	/* clear the SDMA current and first TX and RX pointers */
+	GT_REG_WRITE (GALSDMA_0_CUR_RX_PTR, 0);
+	GT_REG_WRITE (GALSDMA_0_CUR_TX_PTR, 0);
+	GT_REG_WRITE (GALSDMA_0_FIR_TX_PTR, 0);
+
+	udelay (100);
+
+	return 0;
+}
+
+static void galsdma_enable_rx (void)
+{
+	int temp;
+
+	/* Enable RX processing */
+	temp = GTREGREAD (GALSDMA_0_COM_REG + (CHANNEL * GALSDMA_REG_DIFF));
+	temp |= RX_ENABLE;
+	GT_REG_WRITE (GALSDMA_0_COM_REG + (CHANNEL * GALSDMA_REG_DIFF), temp);
+
+	galmpsc_enter_hunt (CHANNEL);
+}
+
+static int galmpsc_set_snoop (int mpsc, int value)
+{
+	int reg =
+		mpsc ? MPSC_1_ADDRESS_CONTROL_LOW :
+		MPSC_0_ADDRESS_CONTROL_LOW;
+	int temp = GTREGREAD (reg);
+
+	if (value)
+		temp |= (1 << 6) | (1 << 14) | (1 << 22) | (1 << 30);
+	else
+		temp &= ~((1 << 6) | (1 << 14) | (1 << 22) | (1 << 30));
+	GT_REG_WRITE (reg, temp);
+	return 0;
+}
+
+/*******************************************************************************
+* galsdma_set_mem_space - Set MV64360 IDMA memory decoding map.
+*
+* DESCRIPTION:
+*       the MV64360 SDMA has its own address decoding map that is de-coupled
+*       from the CPU interface address decoding windows. The SDMA channels
+*       share four address windows. Each region can be individually configured
+*       by this function by associating it to a target interface and setting
+*       base and size values.
+*
+*      NOTE!!!
+*       The size must be in 64Kbyte granularity.
+*       The base address must be aligned to the size.
+*       The size must be a series of 1s followed by a series of zeros
+*
+* OUTPUT:
+*       None.
+*
+* RETURN:
+*       True for success, false otherwise.
+*
+*******************************************************************************/
+
+static int galsdma_set_mem_space (unsigned int memSpace,
+				  unsigned int memSpaceTarget,
+				  unsigned int memSpaceAttr,
+				  unsigned int baseAddress, unsigned int size)
+{
+	unsigned int temp;
+
+	if (size == 0) {
+		GT_RESET_REG_BITS (MV64360_CUNIT_BASE_ADDR_ENABLE_REG,
+				   1 << memSpace);
+		return true;
+	}
+
+	/* The base address must be aligned to the size.  */
+	if (baseAddress % size != 0) {
+		return false;
+	}
+	if (size < 0x10000) {
+		return false;
+	}
+
+	/* Align size and base to 64K */
+	baseAddress &= 0xffff0000;
+	size &= 0xffff0000;
+	temp = size >> 16;
+
+	/* Checking that the size is a sequence of '1' followed by a
+	   sequence of '0' starting from LSB to MSB. */
+	while ((temp > 0) && (temp & 0x1)) {
+		temp = temp >> 1;
+	}
+
+	if (temp != 0) {
+		GT_REG_WRITE (MV64360_CUNIT_BASE_ADDR_REG0 + memSpace * 8,
+			      (baseAddress | memSpaceTarget | memSpaceAttr));
+		GT_REG_WRITE ((MV64360_CUNIT_SIZE0 + memSpace * 8),
+			      (size - 1) & 0xffff0000);
+		GT_RESET_REG_BITS (MV64360_CUNIT_BASE_ADDR_ENABLE_REG,
+				   1 << memSpace);
+	} else {
+		/* An invalid size was specified */
+		return false;
+	}
+	return true;
+}