[PATCH] powerpc: Add support for Xilinx ML403 reference design

Includes fix for Xilinx silicon errata 213

Signed-off-by: Grant C. Likely <grant.likely@secretlab.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>

5 files changed, 241 insertions, 2 deletions

diff --git a/arch/ppc/platforms/4xx/Kconfig b/arch/ppc/platforms/4xx/Kconfig
index 057c7c2ab99..174ddbc9758 100644
--- a/arch/ppc/platforms/4xx/Kconfig
+++ b/arch/ppc/platforms/4xx/Kconfig
@@ -57,6 +57,10 @@ config XILINX_ML300
         help
           This option enables support for the Xilinx ML300 evaluation board.
 
+config XILINX_ML403
+        bool "Xilinx-ML403"
+        help
+          This option enables support for the Xilinx ML403 evaluation board.
 endchoice
 
 choice
@@ -208,9 +212,14 @@ config XILINX_VIRTEX_II_PRO
         depends on XILINX_ML300
         default y
 
+config XILINX_VIRTEX_4_FX
+        bool
+        depends on XILINX_ML403
+        default y
+
 config XILINX_VIRTEX
         bool
-        depends on XILINX_VIRTEX_II_PRO
+        depends on XILINX_VIRTEX_II_PRO || XILINX_VIRTEX_4_FX
         default y
 
 config STB03xxx
@@ -220,7 +229,7 @@ config STB03xxx
 
 config EMBEDDEDBOOT
         bool
-        depends on EP405 || XILINX_ML300
+        depends on EP405 || XILINX_ML300 || XILINX_ML403
         default y
 
 config IBM_OPENBIOS
diff --git a/arch/ppc/platforms/4xx/Makefile b/arch/ppc/platforms/4xx/Makefile
index be4163c8afe..a04a0d0a0f5 100644
--- a/arch/ppc/platforms/4xx/Makefile
+++ b/arch/ppc/platforms/4xx/Makefile
@@ -14,6 +14,7 @@ obj-$(CONFIG_REDWOOD_6)		+= redwood6.o
 obj-$(CONFIG_SYCAMORE)          += sycamore.o
 obj-$(CONFIG_WALNUT)            += walnut.o
 obj-$(CONFIG_XILINX_ML300)      += xilinx_ml300.o
+obj-$(CONFIG_XILINX_ML403)      += xilinx_ml403.o
 
 obj-$(CONFIG_405GP)             += ibm405gp.o
 obj-$(CONFIG_REDWOOD_5)         += ibmstb4.o
@@ -27,3 +28,4 @@ obj-$(CONFIG_440SPE)		+= ppc440spe.o
 obj-$(CONFIG_405EP)             += ibm405ep.o
 obj-$(CONFIG_405GPR)            += ibm405gpr.o
 obj-$(CONFIG_XILINX_VIRTEX)     += virtex.o
+
diff --git a/arch/ppc/platforms/4xx/xilinx_ml403.c b/arch/ppc/platforms/4xx/xilinx_ml403.c
new file mode 100644
index 00000000000..4c0c7e4c111
--- /dev/null
+++ b/arch/ppc/platforms/4xx/xilinx_ml403.c
@@ -0,0 +1,177 @@
+/*
+ * arch/ppc/platforms/4xx/xilinx_ml403.c
+ *
+ * Xilinx ML403 evaluation board initialization
+ *
+ * Author: Grant Likely <grant.likely@secretlab.ca>
+ *
+ * 2005 (c) Secret Lab Technologies Ltd.
+ * 2002-2004 (c) MontaVista Software, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/tty.h>
+#include <linux/serial.h>
+#include <linux/serial_core.h>
+#include <linux/serial_8250.h>
+#include <linux/serialP.h>
+#include <asm/io.h>
+#include <asm/machdep.h>
+#include <asm/ppc_sys.h>
+
+#include <syslib/gen550.h>
+#include <platforms/4xx/xparameters/xparameters.h>
+
+/*
+ * As an overview of how the following functions (platform_init,
+ * ml403_map_io, ml403_setup_arch and ml403_init_IRQ) fit into the
+ * kernel startup procedure, here's a call tree:
+ *
+ * start_here                                   arch/ppc/kernel/head_4xx.S
+ *  early_init                                  arch/ppc/kernel/setup.c
+ *  machine_init                                arch/ppc/kernel/setup.c
+ *    platform_init                             this file
+ *      ppc4xx_init                             arch/ppc/syslib/ppc4xx_setup.c
+ *        parse_bootinfo
+ *          find_bootinfo
+ *        "setup some default ppc_md pointers"
+ *  MMU_init                                    arch/ppc/mm/init.c
+ *    *ppc_md.setup_io_mappings == ml403_map_io this file
+ *      ppc4xx_map_io                           arch/ppc/syslib/ppc4xx_setup.c
+ *  start_kernel                                init/main.c
+ *    setup_arch                                arch/ppc/kernel/setup.c
+ * #if defined(CONFIG_KGDB)
+ *      *ppc_md.kgdb_map_scc() == gen550_kgdb_map_scc
+ * #endif
+ *      *ppc_md.setup_arch == ml403_setup_arch  this file
+ *        ppc4xx_setup_arch                     arch/ppc/syslib/ppc4xx_setup.c
+ *          ppc4xx_find_bridges                 arch/ppc/syslib/ppc405_pci.c
+ *    init_IRQ                                  arch/ppc/kernel/irq.c
+ *      *ppc_md.init_IRQ == ml403_init_IRQ      this file
+ *        ppc4xx_init_IRQ                       arch/ppc/syslib/ppc4xx_setup.c
+ *          ppc4xx_pic_init                     arch/ppc/syslib/xilinx_pic.c
+ */
+
+/* Board specifications structures */
+struct ppc_sys_spec *cur_ppc_sys_spec;
+struct ppc_sys_spec ppc_sys_specs[] = {
+        {
+                /* Only one entry, always assume the same design */
+                .ppc_sys_name   = "Xilinx ML403 Reference Design",
+                .mask           = 0x00000000,
+                .value          = 0x00000000,
+                .num_devices    = 1,
+                .device_list    = (enum ppc_sys_devices[])
+                {
+                        VIRTEX_UART,
+                },
+        },
+};
+
+#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
+
+static volatile unsigned *powerdown_base =
+    (volatile unsigned *) XPAR_POWER_0_POWERDOWN_BASEADDR;
+
+static void
+xilinx_power_off(void)
+{
+        local_irq_disable();
+        out_be32(powerdown_base, XPAR_POWER_0_POWERDOWN_VALUE);
+        while (1) ;
+}
+#endif
+
+void __init
+ml403_map_io(void)
+{
+        ppc4xx_map_io();
+
+#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
+        powerdown_base = ioremap((unsigned long) powerdown_base,
+                                 XPAR_POWER_0_POWERDOWN_HIGHADDR -
+                                 XPAR_POWER_0_POWERDOWN_BASEADDR + 1);
+#endif
+}
+
+/* Early serial support functions */
+static void __init
+ml403_early_serial_init(int num, struct plat_serial8250_port *pdata)
+{
+#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+        struct uart_port serial_req;
+
+        memset(&serial_req, 0, sizeof(serial_req));
+        serial_req.mapbase      = pdata->mapbase;
+        serial_req.membase      = pdata->membase;
+        serial_req.irq          = pdata->irq;
+        serial_req.uartclk      = pdata->uartclk;
+        serial_req.regshift     = pdata->regshift;
+        serial_req.iotype       = pdata->iotype;
+        serial_req.flags        = pdata->flags;
+        gen550_init(num, &serial_req);
+#endif
+}
+
+void __init
+ml403_early_serial_map(void)
+{
+#ifdef CONFIG_SERIAL_8250
+        struct plat_serial8250_port *pdata;
+        int i = 0;
+
+        pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(VIRTEX_UART);
+        while(pdata && pdata->flags)
+        {
+                pdata->membase = ioremap(pdata->mapbase, 0x100);
+                ml403_early_serial_init(i, pdata);
+                pdata++;
+                i++;
+        }
+#endif /* CONFIG_SERIAL_8250 */
+}
+
+void __init
+ml403_setup_arch(void)
+{
+        ml403_early_serial_map();
+        ppc4xx_setup_arch();    /* calls ppc4xx_find_bridges() */
+
+        /* Identify the system */
+        printk(KERN_INFO "Xilinx ML403 Reference System (Virtex-4 FX)\n");
+}
+
+/* Called after board_setup_irq from ppc4xx_init_IRQ(). */
+void __init
+ml403_init_irq(void)
+{
+        ppc4xx_init_IRQ();
+}
+
+void __init
+platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
+              unsigned long r6, unsigned long r7)
+{
+        ppc4xx_init(r3, r4, r5, r6, r7);
+
+        identify_ppc_sys_by_id(mfspr(SPRN_PVR));
+
+        ppc_md.setup_arch = ml403_setup_arch;
+        ppc_md.setup_io_mappings = ml403_map_io;
+        ppc_md.init_IRQ = ml403_init_irq;
+
+#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
+        ppc_md.power_off = xilinx_power_off;
+#endif
+
+#ifdef CONFIG_KGDB
+        ppc_md.early_serial_map = ml403_early_serial_map;
+#endif
+}
+
diff --git a/arch/ppc/platforms/4xx/xilinx_ml403.h b/arch/ppc/platforms/4xx/xilinx_ml403.h
new file mode 100644
index 00000000000..47359695990
--- /dev/null
+++ b/arch/ppc/platforms/4xx/xilinx_ml403.h
@@ -0,0 +1,49 @@
+/*
+ * arch/ppc/platforms/4xx/xilinx_ml403.h
+ *
+ * Include file that defines the Xilinx ML403 reference design
+ *
+ * Author: Grant Likely <grant.likely@secretlab.ca>
+ *
+ * 2005 (c) Secret Lab Technologies Ltd.
+ * 2002-2004 (c) MontaVista Software, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#ifdef __KERNEL__
+#ifndef __ASM_XILINX_ML403_H__
+#define __ASM_XILINX_ML403_H__
+
+/* ML403 has a Xilinx Virtex-4 FPGA with a PPC405 hard core */
+#include <platforms/4xx/virtex.h>
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+
+typedef struct board_info {
+        unsigned int     bi_memsize;            /* DRAM installed, in bytes */
+        unsigned char    bi_enetaddr[6];        /* Local Ethernet MAC address */
+        unsigned int     bi_intfreq;            /* Processor speed, in Hz */
+        unsigned int     bi_busfreq;            /* PLB Bus speed, in Hz */
+        unsigned int     bi_pci_busfreq;        /* PCI Bus speed, in Hz */
+} bd_t;
+
+/* Some 4xx parts use a different timebase frequency from the internal clock.
+*/
+#define bi_tbfreq bi_intfreq
+
+#endif /* !__ASSEMBLY__ */
+
+/* We don't need anything mapped.  Size of zero will accomplish that. */
+#define PPC4xx_ONB_IO_PADDR     0u
+#define PPC4xx_ONB_IO_VADDR     0u
+#define PPC4xx_ONB_IO_SIZE      0u
+
+#define PPC4xx_MACHINE_NAME "Xilinx ML403 Reference Design"
+
+#endif /* __ASM_XILINX_ML403_H__ */
+#endif /* __KERNEL__ */
diff --git a/arch/ppc/platforms/4xx/xparameters/xparameters.h b/arch/ppc/platforms/4xx/xparameters/xparameters.h
index 7b7304379dd..4cf21f25635 100644
--- a/arch/ppc/platforms/4xx/xparameters/xparameters.h
+++ b/arch/ppc/platforms/4xx/xparameters/xparameters.h
@@ -16,6 +16,8 @@
 
 #if defined(CONFIG_XILINX_ML300)
   #include "xparameters_ml300.h"
+#elif defined(CONFIG_XILINX_ML403)
+  #include "xparameters_ml403.h"
 #else
   /* Add other board xparameter includes here before the #else */
   #error No xparameters_*.h file included