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Diffstat (limited to 'board/Marvell/db64460/mpsc.c')
| -rw-r--r-- | board/Marvell/db64460/mpsc.c | 1019 |
1 files changed, 1019 insertions, 0 deletions
diff --git a/board/Marvell/db64460/mpsc.c b/board/Marvell/db64460/mpsc.c new file mode 100644 index 0000000..33fbc49 --- /dev/null +++ b/board/Marvell/db64460/mpsc.c @@ -0,0 +1,1019 @@ +/* + * (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 DB64460 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 "../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_indent: Standard input:229: Warning:old style assignment ambiguity in "=&". Assuming "= &" + +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 (MV64460_CUNIT_BASE_ADDR_WIN_0_BIT, + MV64460_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 (MV64460_CUNIT_BASE_ADDR_WIN_1_BIT, + MV64460_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 (MV64460_CUNIT_BASE_ADDR_WIN_2_BIT, + MV64460_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 (MV64460_CUNIT_BASE_ADDR_WIN_3_BIT, + MV64460_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, + (MV64460_SDMA_WIN_ACCESS_FULL << + (MV64460_CUNIT_BASE_ADDR_WIN_0_BIT * 2))); + +/* Setup MPSC1 access mode Window1 full access */ + GT_SET_REG_BITS (MPSC1_ACCESS_PROTECTION_REG, + (MV64460_SDMA_WIN_ACCESS_FULL << + (MV64460_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 MV64460 IDMA memory decoding map. +* +* DESCRIPTION: +* the MV64460 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 (MV64460_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 (MV64460_CUNIT_BASE_ADDR_REG0 + memSpace * 8, + (baseAddress | memSpaceTarget | memSpaceAttr)); + GT_REG_WRITE ((MV64460_CUNIT_SIZE0 + memSpace * 8), + (size - 1) & 0xffff0000); + GT_RESET_REG_BITS (MV64460_CUNIT_BASE_ADDR_ENABLE_REG, + 1 << memSpace); + } else { + /* An invalid size was specified */ + return false; + } + return true; +} |