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authorwdenk <wdenk>2002-11-03 00:38:21 +0000
committerwdenk <wdenk>2002-11-03 00:38:21 +0000
commitfe8c2806cdba70479e351299881a395dc2be7785 (patch)
treea1e8b98a1838cba6e6f5c765d9d85339257c45f5 /board/evb64260/mpsc.c
parentf9087a3213cc245cf9b90436475b5af822bd7579 (diff)
downloadu-boot-linaro-stable-fe8c2806cdba70479e351299881a395dc2be7785.tar.gz
Initial revision
Diffstat (limited to 'board/evb64260/mpsc.c')
-rw-r--r--board/evb64260/mpsc.c864
1 files changed, 864 insertions, 0 deletions
diff --git a/board/evb64260/mpsc.c b/board/evb64260/mpsc.c
new file mode 100644
index 000000000..31a6a0d1d
--- /dev/null
+++ b/board/evb64260/mpsc.c
@@ -0,0 +1,864 @@
+/*
+ * (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);
+#ifdef CONFIG_ZUMA_V2
+ 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);
+
+#ifdef CONFIG_ZUMA_V2
+ /* 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;
+ 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);
+
+ 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_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, 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;
+}