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uboot-1.1.4-kirkwood/board/esd/cpci750/mpsc.c
Olaf Rempel f69754bccc u-boot 1.1.4
2024-01-07 23:57:24 +01:00

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/*
* (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;
}
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