/* * (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 */ /* * mpsc.c - driver for console over the MPSC. */ #include <common.h> #include <config.h> #include <asm/cache.h> #include <malloc.h> #include "mpsc.h" int (*mpsc_putchar)(char ch) = mpsc_putchar_early; 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_serial(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 galbrg_reset(int channel); */ #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 /* GT64240A errata: cant read MPSC/BRG registers... so make mirrors in ram for read/modify write */ #define MIRROR_HACK ((struct _tag_mirror_hack *)&(gd->mirror_hack)) #define GT_REG_WRITE_MIRROR_G(a,d) {MIRROR_HACK->a ## _M = d; GT_REG_WRITE(a,d);} #define GTREGREAD_MIRROR_G(a) (MIRROR_HACK->a ## _M) #define GT_REG_WRITE_MIRROR(a,i,g,d) {MIRROR_HACK->a ## _M[i] = d; GT_REG_WRITE(a + (i*g),d);} #define GTREGREAD_MIRROR(a,i,g) (MIRROR_HACK->a ## _M[i]) /* make sure this isn't bigger than 16 long words (u-boot.h) */ struct _tag_mirror_hack { unsigned GALMPSC_PROTOCONF_REG_M[2]; /* 8008 */ unsigned GALMPSC_CHANNELREG_1_M[2]; /* 800c */ unsigned GALMPSC_CHANNELREG_2_M[2]; /* 8010 */ unsigned GALBRG_0_CONFREG_M[2]; /* b200 */ unsigned GALMPSC_ROUTING_REGISTER_M; /* b400 */ unsigned GALMPSC_RxC_ROUTE_M; /* b404 */ unsigned GALMPSC_TxC_ROUTE_M; /* b408 */ unsigned int baudrate; /* current baudrate, for tsc delay calc */ }; /* static struct _tag_mirror_hack *mh = NULL; */ /* 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_MIRROR(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 / MIRROR_HACK->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 | 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) { udelay(100); INVALIDATE_DCACHE(&p[1], &p[2]); } return 0; } char mpsc_getchar(void) { DECLARE_GLOBAL_DATA_PTR; 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){ 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_MIRROR(GALMPSC_CHANNELREG_2,CHANNEL,GALMPSC_REG_GAP); temp |= (1 << 23); GT_REG_WRITE_MIRROR(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 | 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(void) { volatile unsigned int *p=&rx_desc_base[rx_desc_index*8]; INVALIDATE_DCACHE(&p[1], &p[2]); if (p[1] & DESC_OWNER) return 0; else return 1; } int mpsc_init(int baud) { DECLARE_GLOBAL_DATA_PTR; memset(MIRROR_HACK, 0, sizeof(struct _tag_mirror_hack)); MIRROR_HACK->GALMPSC_ROUTING_REGISTER_M=0x3fffffff; /* BRG CONFIG */ galbrg_set_baudrate(CHANNEL, baud); #if defined(CONFIG_ZUMA_V2) || defined(CONFIG_P3G4) galbrg_set_clksrc(CHANNEL,0x8); /* connect TCLK -> BRG */ #else galbrg_set_clksrc(CHANNEL,0); #endif galbrg_set_CUV(CHANNEL, 0); galbrg_enable(CHANNEL); /* Set up clock routing */ galmpsc_connect(CHANNEL, GALMPSC_CONNECT); galmpsc_route_serial(CHANNEL, GALMPSC_CONNECT); galmpsc_route_rx_clock(CHANNEL, CHANNEL); galmpsc_route_tx_clock(CHANNEL, CHANNEL); /* 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 */ /* 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_init2(void) { int i; mpsc_putchar = mpsc_putchar_sdma; /* 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 | 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 | 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); #if defined(CONFIG_ZUMA_V2) || defined(CONFIG_P3G4) /* from tclk */ clock = (CFG_BUS_HZ/(16*rate)) - 1; #else clock = (3686400/(16*rate)) - 1; #endif galbrg_set_CDV(channel, clock); galbrg_enable(channel); MIRROR_HACK->baudrate = rate; return 0; } /* ------------------------------------------------------------------ */ /* Below are all the private functions that no one else needs */ static int galbrg_set_CDV(int channel, int value) { DECLARE_GLOBAL_DATA_PTR; unsigned int temp; temp = GTREGREAD_MIRROR(GALBRG_0_CONFREG, channel, GALBRG_REG_GAP); temp &= 0xFFFF0000; temp |= (value & 0x0000FFFF); GT_REG_WRITE_MIRROR(GALBRG_0_CONFREG,channel,GALBRG_REG_GAP, temp); return 0; } static int galbrg_enable(int channel) { DECLARE_GLOBAL_DATA_PTR; unsigned int temp; temp = GTREGREAD_MIRROR(GALBRG_0_CONFREG, channel, GALBRG_REG_GAP); temp |= 0x00010000; GT_REG_WRITE_MIRROR(GALBRG_0_CONFREG, channel, GALBRG_REG_GAP,temp); return 0; } static int galbrg_disable(int channel) { DECLARE_GLOBAL_DATA_PTR; unsigned int temp; temp = GTREGREAD_MIRROR(GALBRG_0_CONFREG, channel, GALBRG_REG_GAP); temp &= 0xFFFEFFFF; GT_REG_WRITE_MIRROR(GALBRG_0_CONFREG, channel, GALBRG_REG_GAP,temp); return 0; } static int galbrg_set_clksrc(int channel, int value) { DECLARE_GLOBAL_DATA_PTR; unsigned int temp; temp = GTREGREAD_MIRROR(GALBRG_0_CONFREG,channel, GALBRG_REG_GAP); temp &= 0xFF83FFFF; temp |= (value << 18); GT_REG_WRITE_MIRROR(GALBRG_0_CONFREG,channel, GALBRG_REG_GAP,temp); return 0; } static int galbrg_set_CUV(int channel, int value) { 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) { DECLARE_GLOBAL_DATA_PTR; unsigned int temp; temp = GTREGREAD_MIRROR_G(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_MIRROR_G(GALMPSC_ROUTING_REGISTER, temp); return 0; } static int galmpsc_route_serial(int channel, int connect) { unsigned int temp; temp = GTREGREAD(GALMPSC_SERIAL_MULTIPLEX); if ((channel == 0) && connect) temp |= 0x00000100; else if ((channel == 1) && connect) temp |= 0x00001000; else if ((channel == 0) && !connect) temp &= ~0x00000100; else temp &= ~0x00001000; GT_REG_WRITE(GALMPSC_SERIAL_MULTIPLEX,temp); return 0; } static int galmpsc_route_rx_clock(int channel, int brg) { DECLARE_GLOBAL_DATA_PTR; unsigned int temp; temp = GTREGREAD_MIRROR_G(GALMPSC_RxC_ROUTE); if (channel == 0) temp |= brg; else temp |= (brg << 8); GT_REG_WRITE_MIRROR_G(GALMPSC_RxC_ROUTE,temp); return 0; } static int galmpsc_route_tx_clock(int channel, int brg) { DECLARE_GLOBAL_DATA_PTR; unsigned int temp; temp = GTREGREAD_MIRROR_G(GALMPSC_TxC_ROUTE); if (channel == 0) temp |= brg; else temp |= (brg << 8); GT_REG_WRITE_MIRROR_G(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) { DECLARE_GLOBAL_DATA_PTR; GT_REG_WRITE_MIRROR(GALMPSC_CHANNELREG_1,mpsc,GALMPSC_REG_GAP, 0); GT_REG_WRITE_MIRROR(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) { DECLARE_GLOBAL_DATA_PTR; unsigned int temp; temp = GTREGREAD_MIRROR(GALMPSC_CHANNELREG_1,mpsc,GALMPSC_REG_GAP); temp &= 0x0000FFFF; temp |= (value << 16); GT_REG_WRITE_MIRROR(GALMPSC_CHANNELREG_1,mpsc,GALMPSC_REG_GAP, temp); return 0; } static int galmpsc_set_tcschar(int mpsc, int value) { DECLARE_GLOBAL_DATA_PTR; unsigned int temp; temp = GTREGREAD_MIRROR(GALMPSC_CHANNELREG_1,mpsc,GALMPSC_REG_GAP); temp &= 0xFFFF0000; temp |= value; GT_REG_WRITE_MIRROR(GALMPSC_CHANNELREG_1,mpsc,GALMPSC_REG_GAP, temp); return 0; } static int galmpsc_set_char_length(int mpsc, int value) { DECLARE_GLOBAL_DATA_PTR; unsigned int temp; temp = GTREGREAD_MIRROR(GALMPSC_PROTOCONF_REG,mpsc,GALMPSC_REG_GAP); temp &= 0xFFFFCFFF; temp |= (value << 12); GT_REG_WRITE_MIRROR(GALMPSC_PROTOCONF_REG,mpsc,GALMPSC_REG_GAP, temp); return 0; } static int galmpsc_set_stop_bit_length(int mpsc, int value) { DECLARE_GLOBAL_DATA_PTR; unsigned int temp; temp = GTREGREAD_MIRROR(GALMPSC_PROTOCONF_REG,mpsc,GALMPSC_REG_GAP); temp |= (value << 14); GT_REG_WRITE_MIRROR(GALMPSC_PROTOCONF_REG,mpsc,GALMPSC_REG_GAP,temp); return 0; } static int galmpsc_set_parity(int mpsc, int value) { DECLARE_GLOBAL_DATA_PTR; unsigned int temp; temp = GTREGREAD_MIRROR(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_MIRROR(GALMPSC_CHANNELREG_2,mpsc,GALMPSC_REG_GAP, temp); return 0; } static int galmpsc_enter_hunt(int mpsc) { DECLARE_GLOBAL_DATA_PTR; int temp; temp = GTREGREAD_MIRROR(GALMPSC_CHANNELREG_2,mpsc,GALMPSC_REG_GAP); temp |= 0x80000000; GT_REG_WRITE_MIRROR(GALMPSC_CHANNELREG_2,mpsc,GALMPSC_REG_GAP, temp); /* Should Poll on Enter Hunt bit, but the register is write-only */ /* errata suggests pausing 100 system cycles */ udelay(100); return 0; } static int galmpsc_shutdown(int mpsc) { DECLARE_GLOBAL_DATA_PTR; #if 0 unsigned int temp; /* cause RX abort (clears RX) */ temp = GTREGREAD_MIRROR(GALMPSC_CHANNELREG_2,mpsc,GALMPSC_REG_GAP); temp |= MPSC_RX_ABORT | MPSC_TX_ABORT; temp &= ~MPSC_ENTER_HUNT; GT_REG_WRITE_MIRROR(GALMPSC_CHANNELREG_2,mpsc,GALMPSC_REG_GAP,temp); #endif GT_REG_WRITE(GALSDMA_0_COM_REG + CHANNEL * GALSDMA_REG_DIFF, 0); GT_REG_WRITE(GALSDMA_0_COM_REG + CHANNEL * GALSDMA_REG_DIFF, 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_MIRROR(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 + CHANNEL * GALSDMA_REG_DIFF, 0x000000fc); udelay(100); /* clear the SDMA current and first TX and RX pointers */ GT_REG_WRITE(GALSDMA_0_CUR_RX_PTR + CHANNEL * GALSDMA_REG_DIFF, 0); GT_REG_WRITE(GALSDMA_0_CUR_TX_PTR + CHANNEL * GALSDMA_REG_DIFF, 0); GT_REG_WRITE(GALSDMA_0_FIR_TX_PTR + CHANNEL * GALSDMA_REG_DIFF, 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; }