3 * John Clemens <clemens@mclx.com>, Mission Critical Linux, Inc.
5 * SPDX-License-Identifier: GPL-2.0+
8 /*************************************************************************
9 * changes for Marvell DB64460 eval board 2003 by Ingo Assmus <ingo.assmus@keymile.com>
11 ************************************************************************/
14 * mpsc.c - driver for console over the MPSC.
20 #include <asm/cache.h>
27 #include "../../Marvell/include/memory.h"
29 DECLARE_GLOBAL_DATA_PTR;
31 /* Define this if you wish to use the MPSC as a register based UART.
32 * This will force the serial port to not use the SDMA engine at all.
34 #undef CONFIG_MPSC_DEBUG_PORT
37 int (*mpsc_putchar) (char ch) = mpsc_putchar_early;
38 char (*mpsc_getchar) (void) = mpsc_getchar_debug;
39 int (*mpsc_test_char) (void) = mpsc_test_char_debug;
42 static volatile unsigned int *rx_desc_base = NULL;
43 static unsigned int rx_desc_index = 0;
44 static volatile unsigned int *tx_desc_base = NULL;
45 static unsigned int tx_desc_index = 0;
47 /* local function declarations */
48 static int galmpsc_connect (int channel, int connect);
49 static int galmpsc_route_rx_clock (int channel, int brg);
50 static int galmpsc_route_tx_clock (int channel, int brg);
51 static int galmpsc_write_config_regs (int mpsc, int mode);
52 static int galmpsc_config_channel_regs (int mpsc);
53 static int galmpsc_set_char_length (int mpsc, int value);
54 static int galmpsc_set_stop_bit_length (int mpsc, int value);
55 static int galmpsc_set_parity (int mpsc, int value);
56 static int galmpsc_enter_hunt (int mpsc);
57 static int galmpsc_set_brkcnt (int mpsc, int value);
58 static int galmpsc_set_tcschar (int mpsc, int value);
59 static int galmpsc_set_snoop (int mpsc, int value);
60 static int galmpsc_shutdown (int mpsc);
62 static int galsdma_set_RFT (int channel);
63 static int galsdma_set_SFM (int channel);
64 static int galsdma_set_rxle (int channel);
65 static int galsdma_set_txle (int channel);
66 static int galsdma_set_burstsize (int channel, unsigned int value);
67 static int galsdma_set_RC (int channel, unsigned int value);
69 static int galbrg_set_CDV (int channel, int value);
70 static int galbrg_enable (int channel);
71 static int galbrg_disable (int channel);
72 static int galbrg_set_clksrc (int channel, int value);
73 static int galbrg_set_CUV (int channel, int value);
75 static void galsdma_enable_rx (void);
76 static int galsdma_set_mem_space (unsigned int memSpace,
77 unsigned int memSpaceTarget,
78 unsigned int memSpaceAttr,
79 unsigned int baseAddress,
83 #define SOFTWARE_CACHE_MANAGEMENT
85 #ifdef SOFTWARE_CACHE_MANAGEMENT
86 #define FLUSH_DCACHE(a,b) if(dcache_status()){clean_dcache_range((u32)(a),(u32)(b));}
87 #define FLUSH_AND_INVALIDATE_DCACHE(a,b) if(dcache_status()){flush_dcache_range((u32)(a),(u32)(b));}
88 #define INVALIDATE_DCACHE(a,b) if(dcache_status()){invalidate_dcache_range((u32)(a),(u32)(b));}
90 #define FLUSH_DCACHE(a,b)
91 #define FLUSH_AND_INVALIDATE_DCACHE(a,b)
92 #define INVALIDATE_DCACHE(a,b)
95 #ifdef CONFIG_MPSC_DEBUG_PORT
96 static void mpsc_debug_init (void)
99 volatile unsigned int temp;
101 /* Clear the CFR (CHR4) */
102 /* Write random 'Z' bit (bit 29) of CHR4 to enable debug uart *UNDOCUMENTED FEATURE* */
103 temp = GTREGREAD (GALMPSC_CHANNELREG_4 + (CHANNEL * GALMPSC_REG_GAP));
106 GT_REG_WRITE (GALMPSC_CHANNELREG_4 + (CHANNEL * GALMPSC_REG_GAP),
109 /* Set the Valid bit 'V' (bit 12) and int generation bit 'INT' (bit 15) */
110 temp = GTREGREAD (GALMPSC_CHANNELREG_5 + (CHANNEL * GALMPSC_REG_GAP));
111 temp |= (BIT12 | BIT15);
112 GT_REG_WRITE (GALMPSC_CHANNELREG_5 + (CHANNEL * GALMPSC_REG_GAP),
116 temp = GTREGREAD (GALMPSC_0_INT_MASK);
118 GT_REG_WRITE (GALMPSC_0_INT_MASK, temp);
122 char mpsc_getchar_debug (void)
125 volatile unsigned int cause;
127 cause = GTREGREAD (GALMPSC_0_INT_CAUSE);
128 while ((cause & BIT6) == 0) {
129 cause = GTREGREAD (GALMPSC_0_INT_CAUSE);
132 temp = GTREGREAD (GALMPSC_CHANNELREG_10 +
133 (CHANNEL * GALMPSC_REG_GAP));
134 /* By writing 1's to the set bits, the register is cleared */
135 GT_REG_WRITE (GALMPSC_CHANNELREG_10 + (CHANNEL * GALMPSC_REG_GAP),
137 GT_REG_WRITE (GALMPSC_0_INT_CAUSE, cause & ~BIT6);
138 return (temp >> 16) & 0xff;
141 /* special function for running out of flash. doesn't modify any
142 * global variables [josh] */
143 int mpsc_putchar_early (char ch)
147 GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP));
148 galmpsc_set_tcschar (mpsc, ch);
149 GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP),
152 #define MAGIC_FACTOR (10*1000000)
154 udelay (MAGIC_FACTOR / gd->baudrate);
158 /* This is used after relocation, see serial.c and mpsc_init2 */
159 static int mpsc_putchar_sdma (char ch)
161 volatile unsigned int *p;
165 /* align the descriptor */
167 memset ((void *) p, 0, 8 * sizeof (unsigned int));
169 /* fill one 64 bit buffer */
170 /* word swap, pad with 0 */
172 p[5] = (unsigned int) ch; /* x */
174 /* CHANGED completely according to GT64260A dox - NTL */
175 p[0] = 0x00010001; /* 0 */
176 p[1] = DESC_OWNER_BIT | DESC_FIRST | DESC_LAST; /* 4 */
178 p[3] = (unsigned int) &p[4]; /* c */
181 p[9] = DESC_FIRST | DESC_LAST;
182 p[10] = (unsigned int) &p[0];
183 p[11] = (unsigned int) &p[12];
186 FLUSH_DCACHE (&p[0], &p[8]);
188 GT_REG_WRITE (GALSDMA_0_CUR_TX_PTR + (CHANNEL * GALSDMA_REG_DIFF),
189 (unsigned int) &p[0]);
190 GT_REG_WRITE (GALSDMA_0_FIR_TX_PTR + (CHANNEL * GALSDMA_REG_DIFF),
191 (unsigned int) &p[0]);
193 temp = GTREGREAD (GALSDMA_0_COM_REG + (CHANNEL * GALSDMA_REG_DIFF));
194 temp |= (TX_DEMAND | TX_STOP);
195 GT_REG_WRITE (GALSDMA_0_COM_REG + (CHANNEL * GALSDMA_REG_DIFF), temp);
197 INVALIDATE_DCACHE (&p[1], &p[2]);
199 while (p[1] & DESC_OWNER_BIT) {
201 INVALIDATE_DCACHE (&p[1], &p[2]);
206 char mpsc_getchar_sdma (void)
208 static unsigned int done = 0;
210 unsigned int len = 0, idx = 0, temp;
212 volatile unsigned int *p;
216 p = &rx_desc_base[rx_desc_index * 8];
218 INVALIDATE_DCACHE (&p[0], &p[1]);
219 /* Wait for character */
220 while (p[1] & DESC_OWNER_BIT) {
222 INVALIDATE_DCACHE (&p[0], &p[1]);
225 /* Handle error case */
226 if (p[1] & (1 << 15)) {
227 printf ("oops, error: %08x\n", p[1]);
229 temp = GTREGREAD (GALMPSC_CHANNELREG_2 +
230 (CHANNEL * GALMPSC_REG_GAP));
232 GT_REG_WRITE (GALMPSC_CHANNELREG_2 +
233 (CHANNEL * GALMPSC_REG_GAP), temp);
235 /* Can't poll on abort bit, so we just wait. */
238 galsdma_enable_rx ();
241 /* Number of bytes left in this descriptor */
254 INVALIDATE_DCACHE (&p[idx], &p[idx + 1]);
260 /* this descriptor has more bytes still
261 * shift down the char we just read, and leave the
262 * buffer in place for the next time around
264 p[idx] = p[idx] >> 8;
265 FLUSH_DCACHE (&p[idx], &p[idx + 1]);
269 /* nothing left in this descriptor.
272 p[1] = DESC_OWNER_BIT | DESC_FIRST | DESC_LAST;
274 FLUSH_DCACHE (&p[0], &p[1]);
275 /* Next descriptor */
276 rx_desc_index = (rx_desc_index + 1) % RX_DESC;
279 } while (len == 0); /* galileo bug.. len might be zero */
285 int mpsc_test_char_debug (void)
287 if ((GTREGREAD (GALMPSC_0_INT_CAUSE) & BIT6) == 0)
295 int mpsc_test_char_sdma (void)
297 volatile unsigned int *p = &rx_desc_base[rx_desc_index * 8];
299 INVALIDATE_DCACHE (&p[1], &p[2]);
301 if (p[1] & DESC_OWNER_BIT)
307 int mpsc_init (int baud)
310 galbrg_set_baudrate (CHANNEL, baud);
311 galbrg_set_clksrc (CHANNEL, 8); /* set source=Tclk */
312 galbrg_set_CUV (CHANNEL, 0); /* set up CountUpValue */
313 galbrg_enable (CHANNEL); /* Enable BRG */
315 /* Set up clock routing */
316 galmpsc_connect (CHANNEL, GALMPSC_CONNECT); /* connect it */
318 galmpsc_route_rx_clock (CHANNEL, CHANNEL); /* chosse BRG0 for Rx */
319 galmpsc_route_tx_clock (CHANNEL, CHANNEL); /* chose BRG0 for Tx */
321 /* reset MPSC state */
322 galmpsc_shutdown (CHANNEL);
325 galsdma_set_burstsize (CHANNEL, L1_CACHE_BYTES / 8); /* in 64 bit words (8 bytes) */
326 galsdma_set_txle (CHANNEL);
327 galsdma_set_rxle (CHANNEL);
328 galsdma_set_RC (CHANNEL, 0xf);
329 galsdma_set_SFM (CHANNEL);
330 galsdma_set_RFT (CHANNEL);
333 galmpsc_write_config_regs (CHANNEL, GALMPSC_UART);
334 galmpsc_config_channel_regs (CHANNEL);
335 galmpsc_set_char_length (CHANNEL, GALMPSC_CHAR_LENGTH_8); /* 8 */
336 galmpsc_set_parity (CHANNEL, GALMPSC_PARITY_NONE); /* N */
337 galmpsc_set_stop_bit_length (CHANNEL, GALMPSC_STOP_BITS_1); /* 1 */
339 #ifdef CONFIG_MPSC_DEBUG_PORT
343 /* COMM_MPSC CONFIG */
344 #ifdef SOFTWARE_CACHE_MANAGEMENT
345 galmpsc_set_snoop (CHANNEL, 0); /* disable snoop */
347 galmpsc_set_snoop (CHANNEL, 1); /* enable snoop */
354 void mpsc_sdma_init (void)
356 /* Setup SDMA channel0 SDMA_CONFIG_REG*/
357 GT_REG_WRITE (SDMA_CONFIG_REG (0), 0x000020ff);
359 /* Enable MPSC-Window0 for DRAM Bank 0 */
360 if (galsdma_set_mem_space (MV64460_CUNIT_BASE_ADDR_WIN_0_BIT,
361 MV64460_SDMA_DRAM_CS_0_TARGET,
363 memoryGetBankBaseAddress(0),
364 memoryGetBankSize(0)) != true)
365 printf ("%s: SDMA_Window0 memory setup failed !!! \n",
369 /* Enable MPSC-Window1 for DRAM Bank 1 */
370 if (galsdma_set_mem_space (MV64460_CUNIT_BASE_ADDR_WIN_1_BIT,
371 MV64460_SDMA_DRAM_CS_1_TARGET,
373 memoryGetBankBaseAddress(1),
374 memoryGetBankSize(1)) != true)
375 printf ("%s: SDMA_Window1 memory setup failed !!! \n",
379 /* Disable MPSC-Window2 */
380 if (galsdma_set_mem_space (MV64460_CUNIT_BASE_ADDR_WIN_2_BIT,
381 MV64460_SDMA_DRAM_CS_2_TARGET,
383 memoryGetBankBaseAddress(2),
384 memoryGetBankSize(2)) != true)
385 printf ("%s: SDMA_Window2 memory setup failed !!! \n",
389 /* Disable MPSC-Window3 */
390 if (galsdma_set_mem_space (MV64460_CUNIT_BASE_ADDR_WIN_3_BIT,
391 MV64460_SDMA_DRAM_CS_3_TARGET,
393 memoryGetBankBaseAddress(3),
394 memoryGetBankSize(3)) != true)
395 printf ("%s: SDMA_Window3 memory setup failed !!! \n",
398 /* Setup MPSC0 access mode Window0 full access */
399 GT_SET_REG_BITS (MPSC0_ACCESS_PROTECTION_REG,
400 (MV64460_SDMA_WIN_ACCESS_FULL <<
401 (MV64460_CUNIT_BASE_ADDR_WIN_0_BIT * 2)));
403 /* Setup MPSC1 access mode Window1 full access */
404 GT_SET_REG_BITS (MPSC1_ACCESS_PROTECTION_REG,
405 (MV64460_SDMA_WIN_ACCESS_FULL <<
406 (MV64460_CUNIT_BASE_ADDR_WIN_0_BIT * 2)));
408 /* Setup MPSC internal address space base address */
409 GT_REG_WRITE (CUNIT_INTERNAL_SPACE_BASE_ADDR_REG, CONFIG_SYS_GT_REGS);
411 /* no high address remap*/
412 GT_REG_WRITE (CUNIT_HIGH_ADDR_REMAP_REG0, 0x00);
413 GT_REG_WRITE (CUNIT_HIGH_ADDR_REMAP_REG1, 0x00);
415 /* clear interrupt cause register for MPSC (fault register)*/
416 GT_REG_WRITE (CUNIT_INTERRUPT_CAUSE_REG, 0x00);
420 void mpsc_init2 (void)
424 #ifndef CONFIG_MPSC_DEBUG_PORT
425 mpsc_putchar = mpsc_putchar_sdma;
426 mpsc_getchar = mpsc_getchar_sdma;
427 mpsc_test_char = mpsc_test_char_sdma;
430 rx_desc_base = (unsigned int *) malloc (((RX_DESC + 1) * 8) *
431 sizeof (unsigned int));
433 /* align descriptors */
434 rx_desc_base = (unsigned int *)
435 (((unsigned int) rx_desc_base + 32) & 0xFFFFFFF0);
439 memset ((void *) rx_desc_base, 0,
440 (RX_DESC * 8) * sizeof (unsigned int));
442 for (i = 0; i < RX_DESC; i++) {
443 rx_desc_base[i * 8 + 3] = (unsigned int) &rx_desc_base[i * 8 + 4]; /* Buffer */
444 rx_desc_base[i * 8 + 2] = (unsigned int) &rx_desc_base[(i + 1) * 8]; /* Next descriptor */
445 rx_desc_base[i * 8 + 1] = DESC_OWNER_BIT | DESC_FIRST | DESC_LAST; /* Command & control */
446 rx_desc_base[i * 8] = 0x00100000;
448 rx_desc_base[(i - 1) * 8 + 2] = (unsigned int) &rx_desc_base[0];
450 FLUSH_DCACHE (&rx_desc_base[0], &rx_desc_base[RX_DESC * 8]);
451 GT_REG_WRITE (GALSDMA_0_CUR_RX_PTR + (CHANNEL * GALSDMA_REG_DIFF),
452 (unsigned int) &rx_desc_base[0]);
455 tx_desc_base = (unsigned int *) malloc (((TX_DESC + 1) * 8) *
456 sizeof (unsigned int));
458 /* align descriptors */
459 tx_desc_base = (unsigned int *)
460 (((unsigned int) tx_desc_base + 32) & 0xFFFFFFF0);
464 memset ((void *) tx_desc_base, 0,
465 (TX_DESC * 8) * sizeof (unsigned int));
467 for (i = 0; i < TX_DESC; i++) {
468 tx_desc_base[i * 8 + 5] = (unsigned int) 0x23232323;
469 tx_desc_base[i * 8 + 4] = (unsigned int) 0x23232323;
470 tx_desc_base[i * 8 + 3] =
471 (unsigned int) &tx_desc_base[i * 8 + 4];
472 tx_desc_base[i * 8 + 2] =
473 (unsigned int) &tx_desc_base[(i + 1) * 8];
474 tx_desc_base[i * 8 + 1] =
475 DESC_OWNER_BIT | DESC_FIRST | DESC_LAST;
477 /* set sbytecnt and shadow byte cnt to 1 */
478 tx_desc_base[i * 8] = 0x00010001;
480 tx_desc_base[(i - 1) * 8 + 2] = (unsigned int) &tx_desc_base[0];
482 FLUSH_DCACHE (&tx_desc_base[0], &tx_desc_base[TX_DESC * 8]);
486 galsdma_enable_rx ();
491 int galbrg_set_baudrate (int channel, int rate)
495 galbrg_disable (channel); /*ok */
499 clock = (CONFIG_SYS_TCLK / (16 * rate)) - 1;
501 clock = (CONFIG_SYS_TCLK / (16 * rate)) - 1;
504 galbrg_set_CDV (channel, clock); /* set timer Reg. for BRG */
506 galbrg_enable (channel);
513 /* ------------------------------------------------------------------ */
515 /* Below are all the private functions that no one else needs */
517 static int galbrg_set_CDV (int channel, int value)
521 temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
523 temp |= (value & 0x0000FFFF);
524 GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);
529 static int galbrg_enable (int channel)
533 temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
535 GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);
540 static int galbrg_disable (int channel)
544 temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
546 GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);
551 static int galbrg_set_clksrc (int channel, int value)
555 temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
556 temp &= 0xFFC3FFFF; /* Bit 18 - 21 (MV 64260 18-22) */
557 temp |= (value << 18);
558 GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);
562 static int galbrg_set_CUV (int channel, int value)
564 /* set CountUpValue */
565 GT_REG_WRITE (GALBRG_0_BTREG + (channel * GALBRG_REG_GAP), value);
571 static int galbrg_reset (int channel)
575 temp = GTREGREAD (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP));
577 GT_REG_WRITE (GALBRG_0_CONFREG + (channel * GALBRG_REG_GAP), temp);
583 static int galsdma_set_RFT (int channel)
587 temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
589 GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
595 static int galsdma_set_SFM (int channel)
599 temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
601 GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
607 static int galsdma_set_rxle (int channel)
611 temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
613 GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
619 static int galsdma_set_txle (int channel)
623 temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
625 GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
631 static int galsdma_set_RC (int channel, unsigned int value)
635 temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
637 temp |= (value << 2);
638 GT_REG_WRITE (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF),
644 static int galsdma_set_burstsize (int channel, unsigned int value)
648 temp = GTREGREAD (GALSDMA_0_CONF_REG + (channel * GALSDMA_REG_DIFF));
652 GT_REG_WRITE (GALSDMA_0_CONF_REG +
653 (channel * GALSDMA_REG_DIFF),
654 (temp | (0x3 << 12)));
658 GT_REG_WRITE (GALSDMA_0_CONF_REG +
659 (channel * GALSDMA_REG_DIFF),
660 (temp | (0x2 << 12)));
664 GT_REG_WRITE (GALSDMA_0_CONF_REG +
665 (channel * GALSDMA_REG_DIFF),
666 (temp | (0x1 << 12)));
670 GT_REG_WRITE (GALSDMA_0_CONF_REG +
671 (channel * GALSDMA_REG_DIFF),
672 (temp | (0x0 << 12)));
683 static int galmpsc_connect (int channel, int connect)
687 temp = GTREGREAD (GALMPSC_ROUTING_REGISTER);
689 if ((channel == 0) && connect)
691 else if ((channel == 1) && connect)
692 temp &= ~(0x00000007 << 6);
693 else if ((channel == 0) && !connect)
696 temp |= (0x00000007 << 6);
698 /* Just in case... */
701 GT_REG_WRITE (GALMPSC_ROUTING_REGISTER, temp);
706 static int galmpsc_route_rx_clock (int channel, int brg)
710 temp = GTREGREAD (GALMPSC_RxC_ROUTE);
720 GT_REG_WRITE (GALMPSC_RxC_ROUTE, temp);
725 static int galmpsc_route_tx_clock (int channel, int brg)
729 temp = GTREGREAD (GALMPSC_TxC_ROUTE);
739 GT_REG_WRITE (GALMPSC_TxC_ROUTE, temp);
744 static int galmpsc_write_config_regs (int mpsc, int mode)
746 if (mode == GALMPSC_UART) {
747 /* Main config reg Low (Null modem, Enable Tx/Rx, UART mode) */
748 GT_REG_WRITE (GALMPSC_MCONF_LOW + (mpsc * GALMPSC_REG_GAP),
751 /* Main config reg High (32x Rx/Tx clock mode, width=8bits */
752 GT_REG_WRITE (GALMPSC_MCONF_HIGH + (mpsc * GALMPSC_REG_GAP),
756 /* 0000 0010 0000 0000 */
759 /* 0000 0011 1111 1000 */
766 static int galmpsc_config_channel_regs (int mpsc)
768 GT_REG_WRITE (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP), 0);
769 GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP), 0);
770 GT_REG_WRITE (GALMPSC_CHANNELREG_3 + (mpsc * GALMPSC_REG_GAP), 1);
771 GT_REG_WRITE (GALMPSC_CHANNELREG_4 + (mpsc * GALMPSC_REG_GAP), 0);
772 GT_REG_WRITE (GALMPSC_CHANNELREG_5 + (mpsc * GALMPSC_REG_GAP), 0);
773 GT_REG_WRITE (GALMPSC_CHANNELREG_6 + (mpsc * GALMPSC_REG_GAP), 0);
774 GT_REG_WRITE (GALMPSC_CHANNELREG_7 + (mpsc * GALMPSC_REG_GAP), 0);
775 GT_REG_WRITE (GALMPSC_CHANNELREG_8 + (mpsc * GALMPSC_REG_GAP), 0);
776 GT_REG_WRITE (GALMPSC_CHANNELREG_9 + (mpsc * GALMPSC_REG_GAP), 0);
777 GT_REG_WRITE (GALMPSC_CHANNELREG_10 + (mpsc * GALMPSC_REG_GAP), 0);
779 galmpsc_set_brkcnt (mpsc, 0x3);
780 galmpsc_set_tcschar (mpsc, 0xab);
785 static int galmpsc_set_brkcnt (int mpsc, int value)
789 temp = GTREGREAD (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP));
791 temp |= (value << 16);
792 GT_REG_WRITE (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP), temp);
797 static int galmpsc_set_tcschar (int mpsc, int value)
801 temp = GTREGREAD (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP));
804 GT_REG_WRITE (GALMPSC_CHANNELREG_1 + (mpsc * GALMPSC_REG_GAP), temp);
809 static int galmpsc_set_char_length (int mpsc, int value)
813 temp = GTREGREAD (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP));
815 temp |= (value << 12);
816 GT_REG_WRITE (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP), temp);
821 static int galmpsc_set_stop_bit_length (int mpsc, int value)
825 temp = GTREGREAD (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP));
827 temp |= (value << 14);
828 GT_REG_WRITE (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP), temp);
833 static int galmpsc_set_parity (int mpsc, int value)
837 temp = GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP));
840 temp |= ((value << 18) | (value << 2));
841 temp |= ((value << 17) | (value << 1));
846 GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP), temp);
851 static int galmpsc_enter_hunt (int mpsc)
855 temp = GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP));
857 GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP), temp);
859 while (GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP)) &
867 static int galmpsc_shutdown (int mpsc)
871 /* cause RX abort (clears RX) */
872 temp = GTREGREAD (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP));
873 temp |= MPSC_RX_ABORT | MPSC_TX_ABORT;
874 temp &= ~MPSC_ENTER_HUNT;
875 GT_REG_WRITE (GALMPSC_CHANNELREG_2 + (mpsc * GALMPSC_REG_GAP), temp);
877 GT_REG_WRITE (GALSDMA_0_COM_REG, 0);
878 GT_REG_WRITE (GALSDMA_0_COM_REG, SDMA_TX_ABORT | SDMA_RX_ABORT);
880 /* shut down the MPSC */
881 GT_REG_WRITE (GALMPSC_MCONF_LOW, 0);
882 GT_REG_WRITE (GALMPSC_MCONF_HIGH, 0);
883 GT_REG_WRITE (GALMPSC_PROTOCONF_REG + (mpsc * GALMPSC_REG_GAP), 0);
887 /* shut down the sdma engines. */
888 /* reset config to default */
889 GT_REG_WRITE (GALSDMA_0_CONF_REG, 0x000000fc);
893 /* clear the SDMA current and first TX and RX pointers */
894 GT_REG_WRITE (GALSDMA_0_CUR_RX_PTR, 0);
895 GT_REG_WRITE (GALSDMA_0_CUR_TX_PTR, 0);
896 GT_REG_WRITE (GALSDMA_0_FIR_TX_PTR, 0);
903 static void galsdma_enable_rx (void)
907 /* Enable RX processing */
908 temp = GTREGREAD (GALSDMA_0_COM_REG + (CHANNEL * GALSDMA_REG_DIFF));
910 GT_REG_WRITE (GALSDMA_0_COM_REG + (CHANNEL * GALSDMA_REG_DIFF), temp);
912 galmpsc_enter_hunt (CHANNEL);
915 static int galmpsc_set_snoop (int mpsc, int value)
918 mpsc ? MPSC_1_ADDRESS_CONTROL_LOW :
919 MPSC_0_ADDRESS_CONTROL_LOW;
920 int temp = GTREGREAD (reg);
923 temp |= (1 << 6) | (1 << 14) | (1 << 22) | (1 << 30);
925 temp &= ~((1 << 6) | (1 << 14) | (1 << 22) | (1 << 30));
926 GT_REG_WRITE (reg, temp);
930 /*******************************************************************************
931 * galsdma_set_mem_space - Set MV64460 IDMA memory decoding map.
934 * the MV64460 SDMA has its own address decoding map that is de-coupled
935 * from the CPU interface address decoding windows. The SDMA channels
936 * share four address windows. Each region can be individually configured
937 * by this function by associating it to a target interface and setting
938 * base and size values.
941 * The size must be in 64Kbyte granularity.
942 * The base address must be aligned to the size.
943 * The size must be a series of 1s followed by a series of zeros
949 * true for success, false otherwise.
951 *******************************************************************************/
953 static int galsdma_set_mem_space (unsigned int memSpace,
954 unsigned int memSpaceTarget,
955 unsigned int memSpaceAttr,
956 unsigned int baseAddress, unsigned int size)
961 GT_RESET_REG_BITS (MV64460_CUNIT_BASE_ADDR_ENABLE_REG,
966 /* The base address must be aligned to the size. */
967 if (baseAddress % size != 0) {
970 if (size < 0x10000) {
974 /* Align size and base to 64K */
975 baseAddress &= 0xffff0000;
979 /* Checking that the size is a sequence of '1' followed by a
980 sequence of '0' starting from LSB to MSB. */
981 while ((temp > 0) && (temp & 0x1)) {
986 GT_REG_WRITE (MV64460_CUNIT_BASE_ADDR_REG0 + memSpace * 8,
987 (baseAddress | memSpaceTarget | memSpaceAttr));
988 GT_REG_WRITE ((MV64460_CUNIT_SIZE0 + memSpace * 8),
989 (size - 1) & 0xffff0000);
990 GT_RESET_REG_BITS (MV64460_CUNIT_BASE_ADDR_ENABLE_REG,
993 /* An invalid size was specified */