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Diffstat (limited to 'board/eltec/bab7xx/dc_srom.c')
-rw-r--r--board/eltec/bab7xx/dc_srom.c291
1 files changed, 291 insertions, 0 deletions
diff --git a/board/eltec/bab7xx/dc_srom.c b/board/eltec/bab7xx/dc_srom.c
new file mode 100644
index 0000000..ef956e6
--- /dev/null
+++ b/board/eltec/bab7xx/dc_srom.c
@@ -0,0 +1,291 @@
+/*
+ * (C) Copyright 2002 ELTEC Elektronik AG
+ * Frank Gottschling <fgottschling@eltec.de>
+ *
+ * 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
+ */
+
+/*
+ * SRom I/O routines.
+ */
+
+#include <common.h>
+#include <pci.h>
+#include "srom.h"
+
+#define SROM_RD 0x00004000 /* Read from Boot ROM */
+#define SROM_WR 0x00002000 /* Write to Boot ROM */
+#define SROM_SR 0x00000800 /* Select Serial ROM when set */
+
+#define DT_IN 0x00000004 /* Serial Data In */
+#define DT_CLK 0x00000002 /* Serial ROM Clock */
+#define DT_CS 0x00000001 /* Serial ROM Chip Select */
+
+static u_int dc_srom_iobase;
+
+/*----------------------------------------------------------------------------*/
+
+static int inl(u_long addr)
+{
+ return le32_to_cpu(*(volatile u_long *)(addr));
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void outl (int command, u_long addr)
+{
+ *(volatile u_long *)(addr) = cpu_to_le32(command);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void sendto_srom(u_int command, u_long addr)
+{
+ outl(command, addr);
+ udelay(1);
+
+ return;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int getfrom_srom(u_long addr)
+{
+ s32 tmp;
+
+ tmp = inl(addr);
+ udelay(1);
+
+ return tmp;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void srom_latch (u_int command, u_long addr)
+{
+ sendto_srom (command, addr);
+ sendto_srom (command | DT_CLK, addr);
+ sendto_srom (command, addr);
+
+ return;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void srom_command_rd (u_int command, u_long addr)
+{
+ srom_latch (command, addr);
+ srom_latch (command, addr);
+ srom_latch ((command & 0x0000ff00) | DT_CS, addr);
+
+ return;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void srom_command_wr (u_int command, u_long addr)
+{
+ srom_latch (command, addr);
+ srom_latch ((command & 0x0000ff00) | DT_CS, addr);
+ srom_latch (command, addr);
+
+ return;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void srom_address(u_int command, u_long addr, u_char offset)
+{
+ int i;
+ signed char a;
+
+ a = (char)(offset << 2);
+ for (i=0; i<6; i++, a <<= 1)
+ {
+ srom_latch(command | ((a < 0) ? DT_IN : 0), addr);
+ }
+ udelay(1);
+
+ i = (getfrom_srom(addr) >> 3) & 0x01;
+
+ return;
+}
+/*----------------------------------------------------------------------------*/
+
+static short srom_data_rd (u_int command, u_long addr)
+{
+ int i;
+ short word = 0;
+ s32 tmp;
+
+ for (i=0; i<16; i++)
+ {
+ sendto_srom(command | DT_CLK, addr);
+ tmp = getfrom_srom(addr);
+ sendto_srom(command, addr);
+
+ word = (word << 1) | ((tmp >> 3) & 0x01);
+ }
+
+ sendto_srom(command & 0x0000ff00, addr);
+
+ return word;
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int srom_data_wr (u_int command, u_long addr, short val)
+{
+ int i;
+ u_long longVal;
+ s32 tmp;
+
+ longVal = (u_long)(le16_to_cpu(val));
+
+ for (i=0; i<16; i++)
+ {
+ tmp = (longVal & 0x8000)>>13;
+
+ sendto_srom (tmp | command, addr);
+ sendto_srom (tmp | command | DT_CLK, addr);
+ sendto_srom (tmp | command, addr);
+
+ longVal = longVal<<1;
+ }
+
+ sendto_srom(command & 0x0000ff00, addr);
+ sendto_srom(command, addr);
+
+ tmp = 100;
+ do
+ {
+ if ((getfrom_srom(dc_srom_iobase) & 0x8) == 0x8)
+ break;
+ udelay(1000);
+ } while (--tmp);
+
+ if (tmp == 0)
+ {
+ printf("Write DEC21143 SRom timed out !\n");
+ return (-1);
+ }
+
+ return 0;
+}
+
+
+/*----------------------------------------------------------------------------*/
+static short srom_rd (u_long addr, u_char offset)
+{
+ sendto_srom (SROM_RD | SROM_SR, addr);
+ srom_latch (SROM_RD | SROM_SR | DT_CS, addr);
+
+ srom_command_rd (SROM_RD | SROM_SR | DT_IN | DT_CS, addr);
+
+ srom_address (SROM_RD | SROM_SR | DT_CS, addr, offset);
+
+ return srom_data_rd (SROM_RD | SROM_SR | DT_CS, addr);
+}
+
+/*----------------------------------------------------------------------------*/
+
+static void srom_wr_enable (u_long addr)
+{
+ int i;
+
+ sendto_srom (SROM_WR | SROM_SR, addr);
+ srom_latch (SROM_WR | SROM_SR | DT_CS, addr);
+
+ srom_latch (SROM_WR | SROM_SR | DT_IN | DT_CS, addr);
+ srom_latch (SROM_WR | SROM_SR | DT_CS, addr);
+ srom_latch (SROM_WR | SROM_SR | DT_CS, addr);
+
+ for (i=0; i<6; i++)
+ {
+ srom_latch (SROM_WR | SROM_SR | DT_IN | DT_CS, addr);
+ }
+}
+
+/*----------------------------------------------------------------------------*/
+
+static int srom_wr (u_long addr, u_char offset, short val)
+{
+ srom_wr_enable (addr);
+
+ sendto_srom (SROM_WR | SROM_SR, addr);
+ srom_latch (SROM_WR | SROM_SR | DT_CS, addr);
+
+ srom_command_wr (SROM_WR | SROM_SR | DT_IN | DT_CS, addr);
+
+ srom_address (SROM_WR | SROM_SR | DT_CS, addr, offset);
+
+ return srom_data_wr (SROM_WR | SROM_SR | DT_CS, addr, val);
+}
+
+/*----------------------------------------------------------------------------*/
+/*
+ * load data from the srom
+ */
+int dc_srom_load (u_short *dest)
+{
+ int offset;
+ short tmp;
+
+ /* get srom iobase from local network controller */
+ pci_read_config_dword(PCI_BDF(0,14,0), PCI_BASE_ADDRESS_1, &dc_srom_iobase);
+ dc_srom_iobase &= PCI_BASE_ADDRESS_MEM_MASK;
+ dc_srom_iobase = pci_mem_to_phys(PCI_BDF(0,14,0), dc_srom_iobase);
+ dc_srom_iobase += 0x48; /* io offset for srom access */
+
+ memset (dest, 0, 128);
+ for (offset=0; offset<64; offset++)
+ {
+ tmp = srom_rd (dc_srom_iobase, offset);
+ *dest++ = le16_to_cpu(tmp);
+ }
+
+ return (0);
+}
+
+/*----------------------------------------------------------------------------*/
+
+/*
+ * store data into the srom
+ */
+int dc_srom_store (u_short *src)
+{
+ int offset;
+
+ /* get srom iobase from local network controller */
+ pci_read_config_dword(PCI_BDF(0,14,0), PCI_BASE_ADDRESS_1, &dc_srom_iobase);
+ dc_srom_iobase &= PCI_BASE_ADDRESS_MEM_MASK;
+ dc_srom_iobase = pci_mem_to_phys(PCI_BDF(0,14,0), dc_srom_iobase);
+ dc_srom_iobase += 0x48; /* io offset for srom access */
+
+ for (offset=0; offset<64; offset++)
+ {
+ if (srom_wr (dc_srom_iobase, offset, *src) == -1)
+ return (-1);
+ src++;
+ }
+
+ return (0);
+}
+
+/*----------------------------------------------------------------------------*/
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