Initial revision

2 files changed, 604 insertions, 0 deletions

diff --git a/board/mbx8xx/flash.c b/board/mbx8xx/flash.c
new file mode 100644
index 0000000..e1aa47b
--- /dev/null
+++ b/board/mbx8xx/flash.c
@@ -0,0 +1,408 @@
+/*
+ * (C) Copyright 2000
+ * Marius Groeger <mgroeger@sysgo.de>
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ *
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Flash Routines for AM290[48]0B devices
+ *
+ *--------------------------------------------------------------------
+ * 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
+ */
+
+#include <common.h>
+#include <mpc8xx.h>
+#include "vpd.h"
+
+flash_info_t	flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+
+static ulong flash_get_size (vu_long *addr, flash_info_t *info);
+static int write_word (flash_info_t *info, ulong dest, ulong data);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+    unsigned long size, totsize;
+    int i;
+    ulong addr;
+
+    /* Init: no FLASHes known */
+    for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
+	flash_info[i].flash_id = FLASH_UNKNOWN;
+    }
+
+    totsize = 0;
+    addr = 0xfc000000;
+    for(i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+	size = flash_get_size((vu_long *)addr, &flash_info[i]);
+	if (flash_info[i].flash_id == FLASH_UNKNOWN)
+	  break;
+	totsize += size;
+	addr += size;
+    }
+
+    addr = 0xfe000000;
+    for(i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+
+	size = flash_get_size((vu_long *)addr, &flash_info[i]);
+	if (flash_info[i].flash_id == FLASH_UNKNOWN)
+	  break;
+	totsize += size;
+	addr += size;
+    }
+
+#if CFG_MONITOR_BASE >= CFG_FLASH_BASE
+    /* monitor protection ON by default */
+    flash_protect(FLAG_PROTECT_SET,
+		  CFG_MONITOR_BASE,
+		  CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
+		  &flash_info[0]);
+#endif
+
+    return (totsize);
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info  (flash_info_t *info)
+{
+    int i;
+
+    if (info->flash_id == FLASH_UNKNOWN) {
+	printf ("missing or unknown FLASH type\n");
+	return;
+    }
+
+    switch (info->flash_id >> 16) {
+    case 0x1:
+	printf ("AMD ");
+	break;
+    default:
+	printf ("Unknown Vendor ");
+	break;
+    }
+
+    switch (info->flash_id & FLASH_TYPEMASK) {
+    case AMD_ID_F040B:
+	printf ("AM29F040B (4 Mbit)\n");
+	break;
+    case AMD_ID_F080B:
+	printf ("AM29F080B (8 Mbit)\n");
+	break;
+    case AMD_ID_F016D:
+	printf ("AM29F016D (16 Mbit)\n");
+	break;
+    default:
+	printf ("Unknown Chip Type\n");
+	break;
+    }
+
+    printf ("  Size: %ld MB in %d Sectors\n",
+	    info->size >> 20, info->sector_count);
+
+    printf ("  Sector Start Addresses:");
+    for (i=0; i<info->sector_count; ++i) {
+	if ((i % 5) == 0)
+	  printf ("\n   ");
+	printf (" %08lX%s",
+		info->start[i],
+		info->protect[i] ? " (RO)" : "     "
+		);
+    }
+    printf ("\n");
+    return;
+}
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+
+static ulong flash_get_size (vu_long *addr, flash_info_t *info)
+{
+    short i;
+    ulong vendor, devid;
+    ulong base = (ulong)addr;
+
+    /* Write auto select command: read Manufacturer ID */
+    addr[0x0555] = 0xAAAAAAAA;
+    addr[0x02AA] = 0x55555555;
+    addr[0x0555] = 0x90909090;
+
+    vendor = addr[0];
+    devid = addr[1] & 0xff;
+
+    /* only support AMD */
+    if (vendor != 0x01010101) {
+	return 0;
+    }
+
+    vendor &= 0xf;
+    devid &= 0xff;
+
+    if (devid == AMD_ID_F040B) {
+	info->flash_id     = vendor << 16 | devid;
+	info->sector_count = 8;
+	info->size         = info->sector_count * 0x10000;
+    }
+    else if (devid == AMD_ID_F080B) {
+	info->flash_id     = vendor << 16 | devid;
+	info->sector_count = 16;
+	info->size         = 4 * info->sector_count * 0x10000;
+    }
+    else if (devid == AMD_ID_F016D) {
+	info->flash_id     = vendor << 16 | devid;
+	info->sector_count = 32;
+	info->size         = 4 * info->sector_count * 0x10000;
+    }
+    else {
+	printf ("## Unknown Flash Type: %08lx\n", devid);
+	return 0;
+    }
+
+    /* check for protected sectors */
+    for (i = 0; i < info->sector_count; i++) {
+	/* sector base address */
+	info->start[i] = base + i * (info->size / info->sector_count);
+	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
+	/* D0 = 1 if protected */
+	addr = (volatile unsigned long *)(info->start[i]);
+	info->protect[i] = addr[2] & 1;
+    }
+
+    /*
+     * Prevent writes to uninitialized FLASH.
+     */
+    if (info->flash_id != FLASH_UNKNOWN) {
+	addr = (vu_long *)info->start[0];
+	addr[0] = 0xF0;	/* reset bank */
+    }
+
+    return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int	flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+    vu_long *addr = (vu_long*)(info->start[0]);
+    int flag, prot, sect, l_sect;
+    ulong start, now, last;
+
+    if ((s_first < 0) || (s_first > s_last)) {
+	if (info->flash_id == FLASH_UNKNOWN) {
+	    printf ("- missing\n");
+	} else {
+	    printf ("- no sectors to erase\n");
+	}
+	return 1;
+    }
+
+    prot = 0;
+    for (sect = s_first; sect <= s_last; sect++) {
+	if (info->protect[sect]) {
+	    prot++;
+	}
+    }
+
+    if (prot) {
+	printf ("- Warning: %d protected sectors will not be erased!\n",
+		prot);
+    } else {
+	printf ("\n");
+    }
+
+    l_sect = -1;
+
+    /* Disable interrupts which might cause a timeout here */
+    flag = disable_interrupts();
+
+    addr[0x0555] = 0XAAAAAAAA;
+    addr[0x02AA] = 0x55555555;
+    addr[0x0555] = 0x80808080;
+    addr[0x0555] = 0XAAAAAAAA;
+    addr[0x02AA] = 0x55555555;
+
+    /* Start erase on unprotected sectors */
+    for (sect = s_first; sect<=s_last; sect++) {
+	if (info->protect[sect] == 0) {	/* not protected */
+	    addr = (vu_long*)(info->start[sect]);
+	    addr[0] = 0x30303030;
+	    l_sect = sect;
+	}
+    }
+
+    /* re-enable interrupts if necessary */
+    if (flag)
+      enable_interrupts();
+
+    /* wait at least 80us - let's wait 1 ms */
+    udelay (1000);
+
+    /*
+     * We wait for the last triggered sector
+     */
+    if (l_sect < 0)
+      goto DONE;
+
+    start = get_timer (0);
+    last  = start;
+    addr = (vu_long*)(info->start[l_sect]);
+    while ((addr[0] & 0x80808080) != 0x80808080) {
+	if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
+	    printf ("Timeout\n");
+	    return 1;
+	}
+	/* show that we're waiting */
+	if ((now - last) > 1000) {	/* every second */
+	    serial_putc ('.');
+	    last = now;
+	}
+    }
+
+    DONE:
+    /* reset to read mode */
+    addr = (volatile unsigned long *)info->start[0];
+    addr[0] = 0xF0F0F0F0;	/* reset bank */
+
+    printf (" done\n");
+    return 0;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+    ulong cp, wp, data;
+    int i, l, rc;
+
+    wp = (addr & ~3);	/* get lower word aligned address */
+
+    /*
+     * handle unaligned start bytes
+     */
+    if ((l = addr - wp) != 0) {
+	data = 0;
+	for (i=0, cp=wp; i<l; ++i, ++cp) {
+	    data = (data << 8) | (*(uchar *)cp);
+	}
+	for (; i<4 && cnt>0; ++i) {
+	    data = (data << 8) | *src++;
+	    --cnt;
+	    ++cp;
+	}
+	for (; cnt==0 && i<4; ++i, ++cp) {
+	    data = (data << 8) | (*(uchar *)cp);
+	}
+
+	if ((rc = write_word(info, wp, data)) != 0) {
+	    return (rc);
+	}
+	wp += 4;
+    }
+
+    /*
+     * handle word aligned part
+     */
+    while (cnt >= 4) {
+	data = 0;
+	for (i=0; i<4; ++i) {
+	    data = (data << 8) | *src++;
+	}
+	if ((rc = write_word(info, wp, data)) != 0) {
+	    return (rc);
+	}
+	wp  += 4;
+	cnt -= 4;
+    }
+
+    if (cnt == 0) {
+	return (0);
+    }
+
+    /*
+     * handle unaligned tail bytes
+     */
+    data = 0;
+    for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
+	data = (data << 8) | *src++;
+	--cnt;
+    }
+    for (; i<4; ++i, ++cp) {
+	data = (data << 8) | (*(uchar *)cp);
+    }
+
+    return (write_word(info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_word (flash_info_t *info, ulong dest, ulong data)
+{
+    vu_long *addr = (vu_long*)(info->start[0]);
+    ulong start;
+    int flag;
+
+    /* Check if Flash is (sufficiently) erased */
+    if ((*((vu_long *)dest) & data) != data) {
+	return (2);
+    }
+    /* Disable interrupts which might cause a timeout here */
+    flag = disable_interrupts();
+
+    addr[0x0555] = 0xAAAAAAAA;
+    addr[0x02AA] = 0x55555555;
+    addr[0x0555] = 0xA0A0A0A0;
+
+    *((vu_long *)dest) = data;
+
+    /* re-enable interrupts if necessary */
+    if (flag)
+      enable_interrupts();
+
+    /* data polling for D7 */
+    start = get_timer (0);
+    while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) {
+	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+	    return (1);
+	}
+    }
+    return (0);
+}
+
+/*-----------------------------------------------------------------------
+ */
diff --git a/board/mbx8xx/vpd.c b/board/mbx8xx/vpd.c
new file mode 100644
index 0000000..6f88352
--- /dev/null
+++ b/board/mbx8xx/vpd.c
@@ -0,0 +1,196 @@
+/*
+ * (C) Copyright 2000
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * Code in faintly related to linux/arch/ppc/8xx_io:
+ * MPC8xx CPM I2C interface. Copyright (c) 1999 Dan Malek (dmalek@jlc.net).
+ *
+ * This file implements functions to read the MBX's Vital Product Data
+ * (VPD). I can't use the more general i2c code in mpc8xx/... since I need
+ * the VPD at a time where there is no RAM available yet. Hence the VPD is
+ * read into a special area in the DPRAM (see config_MBX.h::CFG_DPRAMVPD).
+ *
+ * -----------------------------------------------------------------
+ * 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
+ */
+
+#include <common.h>
+#ifdef CONFIG_8xx
+#include <commproc.h>
+#endif
+#include "vpd.h"
+
+/* Location of receive/transmit buffer descriptors
+ * Allocate one transmit bd and one receive bd.
+ * IIC_BD_FREE points to free bd space which we'll use as tx buffer.
+ */
+#define IIC_BD_TX1     (BD_IIC_START + 0*sizeof(cbd_t))
+#define IIC_BD_TX2     (BD_IIC_START + 1*sizeof(cbd_t))
+#define IIC_BD_RX      (BD_IIC_START + 2*sizeof(cbd_t))
+#define IIC_BD_FREE    (BD_IIC_START + 3*sizeof(cbd_t))
+
+/* FIXME -- replace 0x2000 with offsetof */
+#define VPD_P ((vpd_t *)(CFG_IMMR + 0x2000 + CFG_DPRAMVPD))
+
+/* transmit/receive buffers */
+#define IIC_RX_LENGTH 128
+
+#define WITH_MICROCODE_PATCH
+
+vpd_packet_t * vpd_find_packet(u_char ident)
+{
+    vpd_packet_t *packet;
+    vpd_t *vpd = VPD_P;
+
+    packet = (vpd_packet_t *)&vpd->packets;
+    while ((packet->identifier != ident) && packet->identifier != 0xFF)
+    {
+	packet = (vpd_packet_t *)((char *)packet + packet->size + 2);
+    }
+    return packet;
+}
+
+void vpd_init(void)
+{
+    volatile immap_t  *im = (immap_t *)CFG_IMMR;
+    volatile cpm8xx_t *cp = &(im->im_cpm);
+    volatile i2c8xx_t *i2c = (i2c8xx_t *)&(im->im_i2c);
+    volatile iic_t *iip;
+#ifdef WITH_MICROCODE_PATCH
+    ulong reloc = 0;
+#endif
+
+    iip = (iic_t *)&cp->cp_dparam[PROFF_IIC];
+
+    /*
+     * kludge: when running from flash, no microcode patch can be
+     * installed. However, the DPMEM usually contains non-zero
+     * garbage at the relocatable patch base location, so lets clear
+     * it now. This way the rest of the code can support the microcode
+     * patch dynamically.
+     */
+    if ((ulong)vpd_init & 0xff000000)
+      iip->iic_rpbase = 0;
+
+#ifdef WITH_MICROCODE_PATCH
+    /* Check for and use a microcode relocation patch. */
+    if ((reloc = iip->iic_rpbase))
+      iip = (iic_t *)&cp->cp_dpmem[iip->iic_rpbase];
+#endif
+    /* Initialize Port B IIC pins */
+    cp->cp_pbpar |= 0x00000030;
+    cp->cp_pbdir |= 0x00000030;
+    cp->cp_pbodr |= 0x00000030;
+
+    i2c->i2c_i2mod = 0x04;  /* filter clock */
+    i2c->i2c_i2add = 0x34;	/* select an arbitrary (unique) address */
+    i2c->i2c_i2brg = 0x07;  /* make clock run maximum slow	*/
+    i2c->i2c_i2cmr = 0x00;  /* disable interrupts */
+    i2c->i2c_i2cer = 0x1f;  /* clear events */
+    i2c->i2c_i2com = 0x01;  /* configure i2c to work as master */
+
+    if (vpd_read(0xa4, (uchar*)VPD_P, VPD_EEPROM_SIZE, 0) != VPD_EEPROM_SIZE)
+    {
+	hang();
+    }
+}
+
+
+/* Read from I2C.
+ * This is a two step process.  First, we send the "dummy" write
+ * to set the device offset for the read.  Second, we perform
+ * the read operation.
+ */
+int vpd_read(uint iic_device, uchar *buf, int count, int offset)
+{
+    volatile immap_t  *im = (immap_t *)CFG_IMMR;
+    volatile cpm8xx_t *cp = &(im->im_cpm);
+    volatile i2c8xx_t *i2c = (i2c8xx_t *)&(im->im_i2c);
+    volatile iic_t *iip;
+    volatile cbd_t *tbdf1, *tbdf2, *rbdf;
+    uchar *tb;
+    uchar event;
+#ifdef WITH_MICROCODE_PATCH
+    ulong reloc = 0;
+#endif
+
+    iip = (iic_t *)&cp->cp_dparam[PROFF_IIC];
+#ifdef WITH_MICROCODE_PATCH
+    /* Check for and use a microcode relocation patch. */
+    if ((reloc = iip->iic_rpbase))
+      iip = (iic_t *)&cp->cp_dpmem[iip->iic_rpbase];
+#endif
+    tbdf1 = (cbd_t *)&cp->cp_dpmem[IIC_BD_TX1];
+    tbdf2 = (cbd_t *)&cp->cp_dpmem[IIC_BD_TX2];
+    rbdf  = (cbd_t *)&cp->cp_dpmem[IIC_BD_RX];
+
+    /* Send a "dummy write" operation.  This is a write request with
+     * only the offset sent, followed by another start condition.
+     * This will ensure we start reading from the first location
+     * of the EEPROM.
+     */
+    tb = (uchar*)&cp->cp_dpmem[IIC_BD_FREE];
+    tb[0] = iic_device & 0xfe;	/* device address */
+    tb[1] = offset;	        /* offset */
+    tbdf1->cbd_bufaddr = (uint)tb;
+    tbdf1->cbd_datlen = 2;
+    tbdf1->cbd_sc = 0x8400;
+
+    tb += 2;
+    tb[0] = iic_device | 1;	/* device address */
+    tbdf2->cbd_bufaddr = (uint)tb;
+    tbdf2->cbd_datlen = count+1;
+    tbdf2->cbd_sc = 0xbc00;
+
+    rbdf->cbd_bufaddr = (uint)buf;
+    rbdf->cbd_datlen = 0;
+    rbdf->cbd_sc = 0xb000;
+
+    iip->iic_tbase = IIC_BD_TX1;
+    iip->iic_tbptr = IIC_BD_TX1;
+    iip->iic_rbase = IIC_BD_RX;
+    iip->iic_rbptr = IIC_BD_RX;
+    iip->iic_rfcr = 0x15;
+    iip->iic_tfcr = 0x15;
+    iip->iic_mrblr = count;
+    iip->iic_rstate = 0;
+    iip->iic_tstate = 0;
+
+    i2c->i2c_i2cer = 0x1f;  /* clear event mask */
+    i2c->i2c_i2mod |= 1;    /* enable iic operation */
+    i2c->i2c_i2com |= 0x80;	/* start master */
+
+    /* wait for IIC transfer */
+    do {
+	__asm__ volatile ("eieio");
+	event = i2c->i2c_i2cer;
+    } while (event == 0);
+
+    if ((event & 0x10) || (event & 0x04)) {
+	count = -1;
+	goto bailout;
+    }
+
+bailout:
+    i2c->i2c_i2mod &= ~1;   /* turn off iic operation */
+    i2c->i2c_i2cer = 0x1f;  /* clear event mask */
+
+    return count;
+}