[ARM] 2918/1: [update] Base port of Comdial MP1000 platfrom

Patch from Jon Ringle

Updated 2898/1 per comments:
- Removed fixup
- Moved code in mach-mp1000/ to mach-clps711x/
- Cleaned up code in mp1000-seprom.c. Eliminated code that displayed the contents of the eeprom
Please comment.

Signed-off-by: Jon Ringle
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

5 files changed, 303 insertions, 0 deletions

diff --git a/arch/arm/mach-clps711x/Kconfig b/arch/arm/mach-clps711x/Kconfig
index 0793dcf54f2e..d5c155045762 100644
--- a/arch/arm/mach-clps711x/Kconfig
+++ b/arch/arm/mach-clps711x/Kconfig
@@ -69,6 +69,17 @@ config EP72XX_ROM_BOOT
 
           You almost surely want to say N here.
 
+config MACH_MP1000
+        bool "MACH_MP1000"
+        help
+          Say Y if you intend to run the kernel on the Comdial MP1000 platform.
+
+config MP1000_90MHZ
+        bool "MP1000_90MHZ"
+        depends on MACH_MP1000
+        help
+          Say Y if you have the MP1000 configured to be set at 90MHZ rather than 74MHZ
+
 endmenu
 
 endif
diff --git a/arch/arm/mach-clps711x/Makefile b/arch/arm/mach-clps711x/Makefile
index 4a197315f0cf..8a6dc1ccf8fe 100644
--- a/arch/arm/mach-clps711x/Makefile
+++ b/arch/arm/mach-clps711x/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_ARCH_CDB89712) += cdb89712.o
 obj-$(CONFIG_ARCH_CLEP7312) += clep7312.o
 obj-$(CONFIG_ARCH_EDB7211)  += edb7211-arch.o edb7211-mm.o
 obj-$(CONFIG_ARCH_FORTUNET) += fortunet.o
+obj-$(CONFIG_MACH_MP1000)   += mp1000-mach.o mp1000-mm.o mp1000-seprom.o
 obj-$(CONFIG_ARCH_P720T)    += p720t.o
 leds-$(CONFIG_ARCH_P720T)   += p720t-leds.o
 obj-$(CONFIG_LEDS)          += $(leds-y)
diff --git a/arch/arm/mach-clps711x/mp1000-mach.c b/arch/arm/mach-clps711x/mp1000-mach.c
new file mode 100644
index 000000000000..c2816bcde5e7
--- /dev/null
+++ b/arch/arm/mach-clps711x/mp1000-mach.c
@@ -0,0 +1,49 @@
+/*
+ *  linux/arch/arm/mach-mp1000/mp1000.c
+ *
+ *  Copyright (C) 2005 Comdial Corporation
+ *
+ * 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 <linux/init.h>
+#include <linux/types.h>
+#include <linux/string.h>
+
+#include <asm/setup.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/arch/mp1000-seprom.h>
+
+#include "common.h"
+
+extern void mp1000_map_io(void);
+
+static void __init mp1000_init(void)
+{
+    seprom_init();
+}
+
+MACHINE_START(MP1000, "Comdial MP1000")
+        /* Maintainer: Jon Ringle */
+        .phys_ram       = 0xc0000000,
+        .phys_io        = 0x80000000,
+        .io_pg_offst    = ((0xff000000) >> 18) & 0xfffc,
+        .boot_params    = 0xc0015100,
+        .map_io         = mp1000_map_io,
+        .init_irq       = clps711x_init_irq,
+        .init_machine   = mp1000_init,
+        .timer          = &clps711x_timer,
+MACHINE_END
+
diff --git a/arch/arm/mach-clps711x/mp1000-mm.c b/arch/arm/mach-clps711x/mp1000-mm.c
new file mode 100644
index 000000000000..20e810b0ec0c
--- /dev/null
+++ b/arch/arm/mach-clps711x/mp1000-mm.c
@@ -0,0 +1,47 @@
+/*
+ *  linux/arch/arm/mach-mp1000/mm.c
+ *
+ *  Extra MM routines for the MP1000
+ *
+ *  Copyright (C) 2005 Comdial Corporation
+ *
+ * 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 <linux/kernel.h>
+#include <linux/init.h>
+
+#include <asm/hardware.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/sizes.h>
+
+#include <asm/mach/map.h>
+
+extern void clps711x_map_io(void);
+
+static struct map_desc mp1000_io_desc[] __initdata = {
+    { MP1000_EIO_BASE,  MP1000_EIO_START,       MP1000_EIO_SIZE, MT_DEVICE },
+    { MP1000_FIO_BASE,  MP1000_FIO_START,       MP1000_FIO_SIZE, MT_DEVICE },
+    { MP1000_LIO_BASE,  MP1000_LIO_START,       MP1000_LIO_SIZE, MT_DEVICE },
+    { MP1000_NIO_BASE,  MP1000_NIO_START,       MP1000_NIO_SIZE, MT_DEVICE },
+    { MP1000_IDE_BASE,  MP1000_IDE_START,       MP1000_IDE_SIZE, MT_DEVICE },
+    { MP1000_DSP_BASE,  MP1000_DSP_START,       MP1000_DSP_SIZE, MT_DEVICE }
+};
+
+void __init mp1000_map_io(void)
+{
+        clps711x_map_io();
+        iotable_init(mp1000_io_desc, ARRAY_SIZE(mp1000_io_desc));
+}
diff --git a/arch/arm/mach-clps711x/mp1000-seprom.c b/arch/arm/mach-clps711x/mp1000-seprom.c
new file mode 100644
index 000000000000..b22d0bebb851
--- /dev/null
+++ b/arch/arm/mach-clps711x/mp1000-seprom.c
@@ -0,0 +1,195 @@
+/*`
+ * mp1000-seprom.c
+ *
+ *  This file contains the Serial EEPROM code for the MP1000 board
+ *
+ *  Copyright (C) 2005 Comdial Corporation
+ *
+ * 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 <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/hardware.h>
+#include <asm/hardware/clps7111.h>
+#include <asm/arch/mp1000-seprom.h>
+
+/* If SepromInit() can initialize and checksum the seprom successfully, */
+/* then it will point seprom_data_ptr at the shadow copy.  */
+
+static eeprom_struct seprom_data;                       /* shadow copy of seprom content */
+
+eeprom_struct *seprom_data_ptr = 0;             /* 0 => not initialized */
+
+/*
+ * Port D Bit 5 is Chip Select for EEPROM
+ * Port E Bit 0 is Input, Data out from EEPROM
+ * Port E Bit 1 is Output, Data in to EEPROM
+ * Port E Bit 2 is Output, CLK to EEPROM
+ */
+
+static char *port_d_ptr = (char *)(CLPS7111_VIRT_BASE + PDDR);
+static char *port_e_ptr = (char *)(CLPS7111_VIRT_BASE + PEDR);
+
+#define NO_OF_SHORTS    64      // Device is 64 x 16 bits
+#define ENABLE_RW       0
+#define DISABLE_RW      1
+
+static inline void toggle_seprom_clock(void)
+{
+        *port_e_ptr |= HwPortESepromCLK;
+        *port_e_ptr &= ~(HwPortESepromCLK);
+}
+
+static inline void select_eeprom(void)
+{
+        *port_d_ptr |= HwPortDEECS;
+        *port_e_ptr &= ~(HwPortESepromCLK);
+}
+
+static inline void deselect_eeprom(void)
+{
+        *port_d_ptr &= ~(HwPortDEECS);
+        *port_e_ptr &= ~(HwPortESepromDIn);
+}
+
+/*
+ * GetSepromDataPtr - returns pointer to shadow (RAM) copy of seprom
+ *                    and returns 0 if seprom is not initialized or
+ *                    has a checksum error.
+ */
+
+eeprom_struct* get_seprom_ptr(void)
+{
+        return seprom_data_ptr;
+}
+
+unsigned char* get_eeprom_mac_address(void)
+{
+        return seprom_data_ptr->variant.eprom_struct.mac_Address;
+}
+
+/*
+ * ReadSProm, Physically reads data from the Serial PROM
+ */
+static void read_sprom(short address, int length, eeprom_struct *buffer)
+{
+        short data = COMMAND_READ | (address & 0x3F);
+        short bit;
+        int i;
+
+        select_eeprom();
+
+        // Clock in 9 bits of the command
+        for (i = 0, bit = 0x100; i < 9; i++, bit >>= 1) {
+                if (data & bit)
+                        *port_e_ptr |= HwPortESepromDIn;
+                else
+                        *port_e_ptr &= ~(HwPortESepromDIn);
+
+                toggle_seprom_clock();
+        }
+
+        //
+        // Now read one or more shorts of data from the Seprom
+        //
+        while (length-- > 0) {
+                data = 0;
+
+                // Read 16 bits at a time
+                for (i = 0; i < 16; i++) {
+                        data <<= 1;
+                        toggle_seprom_clock();
+                        data |= *port_e_ptr & HwPortESepromDOut;
+
+                }
+
+                buffer->variant.eprom_short_data[address++] = data;
+        }
+
+        deselect_eeprom();
+
+        return;
+}
+
+
+
+/*
+ * ReadSerialPROM
+ *
+ * Input: Pointer to array of 64 x 16 Bits
+ *
+ * Output: if no problem reading data is filled in
+ */
+static void read_serial_prom(eeprom_struct *data)
+{
+        read_sprom(0, 64, data);
+}
+
+
+//
+// Compute Serial EEPROM checksum
+//
+// Input: Pointer to struct with Eprom data
+//
+// Output: The computed Eprom checksum
+//
+static short compute_seprom_checksum(eeprom_struct *data)
+{
+        short checksum = 0;
+        int i;
+
+        for (i = 0; i < 126; i++) {
+                checksum += (short)data->variant.eprom_byte_data[i];
+        }
+
+        return((short)(0x5555 - (checksum & 0xFFFF)));
+}
+
+//
+// Make sure the data port bits for the SEPROM are correctly initialised
+//
+
+void __init seprom_init(void)
+{
+        short checksum;
+
+        // Init Port D
+        *(char *)(CLPS7111_VIRT_BASE + PDDDR) = 0x0;
+        *(char *)(CLPS7111_VIRT_BASE + PDDR) = 0x15;
+
+        // Init Port E
+        *(int *)(CLPS7111_VIRT_BASE + PEDDR) = 0x06;
+        *(int *)(CLPS7111_VIRT_BASE + PEDR) = 0x04;
+
+        //
+        // Make sure that EEPROM struct size never exceeds 128 bytes
+        //
+        if (sizeof(eeprom_struct) > 128) {
+                panic("Serial PROM struct size > 128, aborting read\n");
+        }
+
+        read_serial_prom(&seprom_data);
+
+        checksum = compute_seprom_checksum(&seprom_data);
+
+        if (checksum != seprom_data.variant.eprom_short_data[63]) {
+                panic("Serial EEPROM checksum failed\n");
+        }
+
+        seprom_data_ptr = &seprom_data;
+}
+