--- /dev/null
+/*
+ * (C) Copyright 2001
+ * John Clemens <clemens@mclx.com>, Mission Critical Linux, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/*************************************************************************
+ * 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"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* 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)
+{
+ 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, CONFIG_SYS_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)
+{
+ int clock;
+
+ galbrg_disable (channel); /*ok */
+
+#ifdef ZUMA_NTL
+ /* from tclk */
+ clock = (CONFIG_SYS_TCLK / (16 * rate)) - 1;
+#else
+ clock = (CONFIG_SYS_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;
+}
Code Review / kvmfornfv.git / blobdiff