powerpc/85xx: Add support for Integrated Flash Controller (IFC)

The Integrated Flash Controller (IFC) is used to access the external
NAND Flash, NOR Flash, EPROM, SRAM and Generic ASIC memories.Four chip
selects are provided in IFC so that maximum of four Flash devices can be
hooked, but only one can be accessed at a given time.

Features supported by IFC are,
        - Functional muxing of pins between NAND, NOR and GPCM
        - Support memory banks of size 64KByte to 4 GBytes
        - Write protection capability (only for NAND and NOR)
        - Provision of Software Reset
        - Flexible Timing programmability for every chip select
        - NAND Machine
                - x8/ x16 NAND Flash Interface
                - SLC and MLC NAND Flash devices support with
                  configurable
                  page sizes of upto 4KB
                - Internal SRAM of 9KB which is directly mapped and
                  availble at
                  boot time for NAND Boot
                - Configurable block size
                - Boot chip select (CS0) available at system reset
        - NOR Machine
                - Data bus width of 8/16/32
                - Compatible with asynchronous NOR Flash
                - Directly memory mapped
                - Supports address data multiplexed (ADM) NOR device
                - Boot chip select (CS0) available at system reset
        - GPCM Machine (NORMAL GPCM Mode)
                - Support for x8/16/32 bit device
                - Compatible with general purpose addressable device
                  e.g. SRAM, ROM
                - External clock is supported with programmable division
                  ratio
        - GPCM Machine (Generic ASIC Mode)
                - Support for x8/16/32 bit device
                - Address and Data are shared on I/O bus
                - Following Address and Data sequences can be supported
                  on I/O bus
                       - 32 bit I/O: AD
                       - 16 bit I/O: AADD
                       - 8 bit I/O : AAAADDDD
                - Configurable Even/Odd Parity on Address/Data bus
                  supported

Signed-off-by: Dipen Dudhat <Dipen.Dudhat@freescale.com>
Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 84 insertions, 0 deletions

diff --git a/arch/powerpc/cpu/mpc8xxx/fsl_ifc.c b/arch/powerpc/cpu/mpc8xxx/fsl_ifc.c
new file mode 100644
index 0000000000..39a455638f
--- /dev/null
+++ b/arch/powerpc/cpu/mpc8xxx/fsl_ifc.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2010-2011 Freescale Semiconductor, Inc.
+ * Author: Dipen Dudhat <dipen.dudhat@freescale.com>
+ *
+ * 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 <asm/fsl_ifc.h>
+
+void print_ifc_regs(void)
+{
+	int i, j;
+
+	printf("IFC Controller Registers\n");
+	for (i = 0; i < FSL_IFC_BANK_COUNT; i++) {
+		printf("CSPR%d:0x%08X\tAMASK%d:0x%08X\tCSOR%d:0x%08X\n",
+			i, get_ifc_cspr(i), i, get_ifc_amask(i),
+			i, get_ifc_csor(i));
+		for (j = 0; j < 4; j++)
+			printf("IFC_FTIM%d:0x%08X\n", j, get_ifc_ftim(i, j));
+	}
+}
+
+void init_early_memctl_regs(void)
+{
+#if defined(CONFIG_SYS_CSPR0) && defined(CONFIG_SYS_CSOR0)
+	set_ifc_cspr(IFC_CS0, CONFIG_SYS_CSPR0);
+	set_ifc_amask(IFC_CS0, CONFIG_SYS_AMASK0);
+	set_ifc_csor(IFC_CS0, CONFIG_SYS_CSOR0);
+
+	set_ifc_ftim(IFC_CS0, IFC_FTIM0, CONFIG_SYS_CS0_FTIM0);
+	set_ifc_ftim(IFC_CS0, IFC_FTIM1, CONFIG_SYS_CS0_FTIM1);
+	set_ifc_ftim(IFC_CS0, IFC_FTIM2, CONFIG_SYS_CS0_FTIM2);
+	set_ifc_ftim(IFC_CS0, IFC_FTIM3, CONFIG_SYS_CS0_FTIM3);
+#endif
+
+#if defined(CONFIG_SYS_CSPR1) && defined(CONFIG_SYS_CSOR1)
+	set_ifc_csor(IFC_CS1, CONFIG_SYS_CSOR1);
+	set_ifc_amask(IFC_CS1, CONFIG_SYS_AMASK1);
+	set_ifc_cspr(IFC_CS1, CONFIG_SYS_CSPR1);
+
+	set_ifc_ftim(IFC_CS1, IFC_FTIM0, CONFIG_SYS_CS1_FTIM0);
+	set_ifc_ftim(IFC_CS1, IFC_FTIM1, CONFIG_SYS_CS1_FTIM1);
+	set_ifc_ftim(IFC_CS1, IFC_FTIM2, CONFIG_SYS_CS1_FTIM2);
+	set_ifc_ftim(IFC_CS1, IFC_FTIM3, CONFIG_SYS_CS1_FTIM3);
+#endif
+
+#if defined(CONFIG_SYS_CSPR2) && defined(CONFIG_SYS_CSOR2)
+	set_ifc_csor(IFC_CS2, CONFIG_SYS_CSOR2);
+	set_ifc_amask(IFC_CS2, CONFIG_SYS_AMASK2);
+	set_ifc_cspr(IFC_CS2, CONFIG_SYS_CSPR2);
+
+	set_ifc_ftim(IFC_CS2, IFC_FTIM0, CONFIG_SYS_CS2_FTIM0);
+	set_ifc_ftim(IFC_CS2, IFC_FTIM1, CONFIG_SYS_CS2_FTIM1);
+	set_ifc_ftim(IFC_CS2, IFC_FTIM2, CONFIG_SYS_CS2_FTIM2);
+	set_ifc_ftim(IFC_CS2, IFC_FTIM3, CONFIG_SYS_CS2_FTIM3);
+
+#endif
+
+#if defined(CONFIG_SYS_CSPR3) && defined(CONFIG_SYS_CSOR3)
+	set_ifc_cspr(IFC_CS3, CONFIG_SYS_CSPR3);
+	set_ifc_amask(IFC_CS3, CONFIG_SYS_AMASK3);
+	set_ifc_csor(IFC_CS3, CONFIG_SYS_CSOR3);
+
+	set_ifc_ftim(IFC_CS3, IFC_FTIM0, CONFIG_SYS_CS3_FTIM0);
+	set_ifc_ftim(IFC_CS3, IFC_FTIM1, CONFIG_SYS_CS3_FTIM1);
+	set_ifc_ftim(IFC_CS3, IFC_FTIM2, CONFIG_SYS_CS3_FTIM2);
+	set_ifc_ftim(IFC_CS3, IFC_FTIM3, CONFIG_SYS_CS3_FTIM3);
+#endif
+}