MIPS: Alchemy: one kernel for DB1000/DB1500/DB1100

These 3 boards are very similar; with this patch a single kernel image
which runs on all three can be built.

Tested on DB1500 and DB1100.

Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2872/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

5 files changed, 80 insertions, 100 deletions

diff --git a/arch/mips/alchemy/Kconfig b/arch/mips/alchemy/Kconfig
index e1b3be787f80..0faaab24376e 100644
--- a/arch/mips/alchemy/Kconfig
+++ b/arch/mips/alchemy/Kconfig
@@ -27,17 +27,12 @@ config MIPS_MTX1
         select SYS_HAS_EARLY_PRINTK
 
 config MIPS_DB1000
-        bool "Alchemy DB1000 board"
+        bool "Alchemy DB1000/DB1500/DB1100 boards"
         select ALCHEMY_GPIOINT_AU1000
         select DMA_NONCOHERENT
         select HW_HAS_PCI
-        select SYS_SUPPORTS_LITTLE_ENDIAN
-        select SYS_HAS_EARLY_PRINTK
-
-config MIPS_DB1100
-        bool "Alchemy DB1100 board"
-        select ALCHEMY_GPIOINT_AU1000
-        select DMA_NONCOHERENT
+        select MIPS_DISABLE_OBSOLETE_IDE
+        select SYS_SUPPORTS_BIG_ENDIAN
         select SYS_SUPPORTS_LITTLE_ENDIAN
         select SYS_HAS_EARLY_PRINTK
 
@@ -57,16 +52,6 @@ config MIPS_DB1300
         select SYS_SUPPORTS_LITTLE_ENDIAN
         select SYS_HAS_EARLY_PRINTK
 
-config MIPS_DB1500
-        bool "Alchemy DB1500 board"
-        select ALCHEMY_GPIOINT_AU1000
-        select DMA_NONCOHERENT
-        select HW_HAS_PCI
-        select MIPS_DISABLE_OBSOLETE_IDE
-        select SYS_SUPPORTS_BIG_ENDIAN
-        select SYS_SUPPORTS_LITTLE_ENDIAN
-        select SYS_HAS_EARLY_PRINTK
-
 config MIPS_DB1550
         bool "Alchemy DB1550 board"
         select ALCHEMY_GPIOINT_AU1000
diff --git a/arch/mips/alchemy/Platform b/arch/mips/alchemy/Platform
index bbdcc150d04d..33f80e8cbd69 100644
--- a/arch/mips/alchemy/Platform
+++ b/arch/mips/alchemy/Platform
@@ -26,27 +26,13 @@ cflags-$(CONFIG_MIPS_PB1550)	+= -I$(srctree)/arch/mips/include/asm/mach-pb1x00
 load-$(CONFIG_MIPS_PB1550)      += 0xffffffff80100000
 
 #
-# AMD Alchemy Db1000 eval board
+# AMD Alchemy Db1000/Db1500/Db1100 eval boards
 #
 platform-$(CONFIG_MIPS_DB1000)  += alchemy/devboards/
 cflags-$(CONFIG_MIPS_DB1000)    += -I$(srctree)/arch/mips/include/asm/mach-db1x00
 load-$(CONFIG_MIPS_DB1000)      += 0xffffffff80100000
 
 #
-# AMD Alchemy Db1100 eval board
-#
-platform-$(CONFIG_MIPS_DB1100)  += alchemy/devboards/
-cflags-$(CONFIG_MIPS_DB1100)    += -I$(srctree)/arch/mips/include/asm/mach-db1x00
-load-$(CONFIG_MIPS_DB1100)      += 0xffffffff80100000
-
-#
-# AMD Alchemy Db1500 eval board
-#
-platform-$(CONFIG_MIPS_DB1500)  += alchemy/devboards/
-cflags-$(CONFIG_MIPS_DB1500)    += -I$(srctree)/arch/mips/include/asm/mach-db1x00
-load-$(CONFIG_MIPS_DB1500)      += 0xffffffff80100000
-
-#
 # AMD Alchemy Db1550 eval board
 #
 platform-$(CONFIG_MIPS_DB1550)  += alchemy/devboards/
diff --git a/arch/mips/alchemy/devboards/Makefile b/arch/mips/alchemy/devboards/Makefile
index 2fbf17909200..3c37fb303364 100644
--- a/arch/mips/alchemy/devboards/Makefile
+++ b/arch/mips/alchemy/devboards/Makefile
@@ -7,9 +7,7 @@ obj-$(CONFIG_PM)		+= pm.o
 obj-$(CONFIG_MIPS_PB1100)       += pb1100.o
 obj-$(CONFIG_MIPS_PB1500)       += pb1500.o
 obj-$(CONFIG_MIPS_PB1550)       += pb1550.o
-obj-$(CONFIG_MIPS_DB1000)       += db1x00.o
-obj-$(CONFIG_MIPS_DB1100)       += db1x00.o
+obj-$(CONFIG_MIPS_DB1000)       += db1000.o
 obj-$(CONFIG_MIPS_DB1200)       += db1200.o
 obj-$(CONFIG_MIPS_DB1300)       += db1300.o
-obj-$(CONFIG_MIPS_DB1500)       += db1x00.o
 obj-$(CONFIG_MIPS_DB1550)       += db1550.o
diff --git a/arch/mips/alchemy/devboards/db1x00.c b/arch/mips/alchemy/devboards/db1000.c
index 589ae2435cbe..57ed5f1c4919 100644
--- a/arch/mips/alchemy/devboards/db1x00.c
+++ b/arch/mips/alchemy/devboards/db1000.c
@@ -32,28 +32,37 @@
 #include <prom.h>
 #include "platform.h"
 
+#define F_SWAPPED (bcsr_read(BCSR_STATUS) & BCSR_STATUS_DB1000_SWAPBOOT)
+
 struct pci_dev;
 
+static const char *board_type_str(void)
+{
+        switch (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI))) {
+        case BCSR_WHOAMI_DB1000:
+                return "DB1000";
+        case BCSR_WHOAMI_DB1500:
+                return "DB1500";
+        case BCSR_WHOAMI_DB1100:
+                return "DB1100";
+        default:
+                return "(unknown)";
+        }
+}
+
 const char *get_system_type(void)
 {
-        return "Alchemy Db1x00";
+        return board_type_str();
 }
 
 void __init board_setup(void)
 {
-#ifdef CONFIG_MIPS_DB1000
-        printk(KERN_INFO "AMD Alchemy Au1000/Db1000 Board\n");
-#endif
-#ifdef CONFIG_MIPS_DB1500
-        printk(KERN_INFO "AMD Alchemy Au1500/Db1500 Board\n");
-#endif
-#ifdef CONFIG_MIPS_DB1100
-        printk(KERN_INFO "AMD Alchemy Au1100/Db1100 Board\n");
-#endif
         /* initialize board register space */
         bcsr_init(DB1000_BCSR_PHYS_ADDR,
                   DB1000_BCSR_PHYS_ADDR + DB1000_BCSR_HEXLED_OFS);
 
+        printk(KERN_INFO "AMD Alchemy %s Board\n", board_type_str());
+
 #if defined(CONFIG_IRDA) && defined(CONFIG_AU1000_FIR)
         {
                 u32 pin_func;
@@ -72,35 +81,6 @@ void __init board_setup(void)
         alchemy_gpio1_input_enable();
 }
 
-/* DB1xxx PCMCIA interrupt sources:
- * CD0/1        GPIO0/3
- * STSCHG0/1    GPIO1/4
- * CARD0/1      GPIO2/5
- */
-
-#define F_SWAPPED (bcsr_read(BCSR_STATUS) & BCSR_STATUS_DB1000_SWAPBOOT)
-
-#if defined(CONFIG_MIPS_DB1000)
-#define DB1XXX_PCMCIA_CD0       AU1000_GPIO0_INT
-#define DB1XXX_PCMCIA_STSCHG0   AU1000_GPIO1_INT
-#define DB1XXX_PCMCIA_CARD0     AU1000_GPIO2_INT
-#define DB1XXX_PCMCIA_CD1       AU1000_GPIO3_INT
-#define DB1XXX_PCMCIA_STSCHG1   AU1000_GPIO4_INT
-#define DB1XXX_PCMCIA_CARD1     AU1000_GPIO5_INT
-#elif defined(CONFIG_MIPS_DB1100)
-#define DB1XXX_PCMCIA_CD0       AU1100_GPIO0_INT
-#define DB1XXX_PCMCIA_STSCHG0   AU1100_GPIO1_INT
-#define DB1XXX_PCMCIA_CARD0     AU1100_GPIO2_INT
-#define DB1XXX_PCMCIA_CD1       AU1100_GPIO3_INT
-#define DB1XXX_PCMCIA_STSCHG1   AU1100_GPIO4_INT
-#define DB1XXX_PCMCIA_CARD1     AU1100_GPIO5_INT
-#elif defined(CONFIG_MIPS_DB1500)
-#define DB1XXX_PCMCIA_CD0       AU1500_GPIO0_INT
-#define DB1XXX_PCMCIA_STSCHG0   AU1500_GPIO1_INT
-#define DB1XXX_PCMCIA_CARD0     AU1500_GPIO2_INT
-#define DB1XXX_PCMCIA_CD1       AU1500_GPIO3_INT
-#define DB1XXX_PCMCIA_STSCHG1   AU1500_GPIO4_INT
-#define DB1XXX_PCMCIA_CARD1     AU1500_GPIO5_INT
 
 static int db1500_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
 {
@@ -141,13 +121,14 @@ static struct platform_device db1500_pci_host_dev = {
 
 static int __init db1500_pci_init(void)
 {
-        return platform_device_register(&db1500_pci_host_dev);
+        if (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI)) == BCSR_WHOAMI_DB1500)
+                return platform_device_register(&db1500_pci_host_dev);
+        return 0;
 }
 /* must be arch_initcall; MIPS PCI scans busses in a subsys_initcall */
 arch_initcall(db1500_pci_init);
-#endif
 
-#ifdef CONFIG_MIPS_DB1100
+
 static struct resource au1100_lcd_resources[] = {
         [0] = {
                 .start  = AU1100_LCD_PHYS_ADDR,
@@ -173,7 +154,6 @@ static struct platform_device au1100_lcd_device = {
         .num_resources  = ARRAY_SIZE(au1100_lcd_resources),
         .resource       = au1100_lcd_resources,
 };
-#endif
 
 static struct resource alchemy_ac97c_res[] = {
         [0] = {
@@ -214,14 +194,53 @@ static struct platform_device db1x00_audio_dev = {
         .name           = "db1000-audio",
 };
 
-static int __init db1xxx_dev_init(void)
+static struct platform_device *db1x00_devs[] = {
+        &db1x00_codec_dev,
+        &alchemy_ac97c_dma_dev,
+        &alchemy_ac97c_dev,
+        &db1x00_audio_dev,
+};
+
+static struct platform_device *db1100_devs[] = {
+        &au1100_lcd_device,
+};
+
+static int __init db1000_dev_init(void)
 {
-        irq_set_irq_type(DB1XXX_PCMCIA_CD0, IRQ_TYPE_EDGE_BOTH);
-        irq_set_irq_type(DB1XXX_PCMCIA_CD1, IRQ_TYPE_EDGE_BOTH);
-        irq_set_irq_type(DB1XXX_PCMCIA_CARD0, IRQ_TYPE_LEVEL_LOW);
-        irq_set_irq_type(DB1XXX_PCMCIA_CARD1, IRQ_TYPE_LEVEL_LOW);
-        irq_set_irq_type(DB1XXX_PCMCIA_STSCHG0, IRQ_TYPE_LEVEL_LOW);
-        irq_set_irq_type(DB1XXX_PCMCIA_STSCHG1, IRQ_TYPE_LEVEL_LOW);
+        int board = BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI));
+        int c0, c1, d0, d1, s0, s1;
+
+        if (board == BCSR_WHOAMI_DB1500) {
+                c0 = AU1500_GPIO2_INT;
+                c1 = AU1500_GPIO5_INT;
+                d0 = AU1500_GPIO0_INT;
+                d1 = AU1500_GPIO3_INT;
+                s0 = AU1500_GPIO1_INT;
+                s1 = AU1500_GPIO4_INT;
+        } else if (board == BCSR_WHOAMI_DB1100) {
+                c0 = AU1100_GPIO2_INT;
+                c1 = AU1100_GPIO5_INT;
+                d0 = AU1100_GPIO0_INT;
+                d1 = AU1100_GPIO3_INT;
+                s0 = AU1100_GPIO1_INT;
+                s1 = AU1100_GPIO4_INT;
+                platform_add_devices(db1100_devs, ARRAY_SIZE(db1100_devs));
+        } else if (board == BCSR_WHOAMI_DB1000) {
+                c0 = AU1000_GPIO2_INT;
+                c1 = AU1000_GPIO5_INT;
+                d0 = AU1000_GPIO0_INT;
+                d1 = AU1000_GPIO3_INT;
+                s0 = AU1000_GPIO1_INT;
+                s1 = AU1000_GPIO4_INT;
+        } else
+                return 0; /* unknown board, no further dev setup to do */
+
+        irq_set_irq_type(d0, IRQ_TYPE_EDGE_BOTH);
+        irq_set_irq_type(d1, IRQ_TYPE_EDGE_BOTH);
+        irq_set_irq_type(c0, IRQ_TYPE_LEVEL_LOW);
+        irq_set_irq_type(c1, IRQ_TYPE_LEVEL_LOW);
+        irq_set_irq_type(s0, IRQ_TYPE_LEVEL_LOW);
+        irq_set_irq_type(s1, IRQ_TYPE_LEVEL_LOW);
 
         db1x_register_pcmcia_socket(
                 AU1000_PCMCIA_ATTR_PHYS_ADDR,
@@ -230,8 +249,7 @@ static int __init db1xxx_dev_init(void)
                 AU1000_PCMCIA_MEM_PHYS_ADDR  + 0x000400000 - 1,
                 AU1000_PCMCIA_IO_PHYS_ADDR,
                 AU1000_PCMCIA_IO_PHYS_ADDR   + 0x000010000 - 1,
-                DB1XXX_PCMCIA_CARD0, DB1XXX_PCMCIA_CD0,
-                /*DB1XXX_PCMCIA_STSCHG0*/0, 0, 0);
+                c0, d0, /*s0*/0, 0, 0);
 
         db1x_register_pcmcia_socket(
                 AU1000_PCMCIA_ATTR_PHYS_ADDR + 0x004000000,
@@ -240,17 +258,10 @@ static int __init db1xxx_dev_init(void)
                 AU1000_PCMCIA_MEM_PHYS_ADDR  + 0x004400000 - 1,
                 AU1000_PCMCIA_IO_PHYS_ADDR   + 0x004000000,
                 AU1000_PCMCIA_IO_PHYS_ADDR   + 0x004010000 - 1,
-                DB1XXX_PCMCIA_CARD1, DB1XXX_PCMCIA_CD1,
-                /*DB1XXX_PCMCIA_STSCHG1*/0, 0, 1);
-#ifdef CONFIG_MIPS_DB1100
-        platform_device_register(&au1100_lcd_device);
-#endif
-        platform_device_register(&db1x00_codec_dev);
-        platform_device_register(&alchemy_ac97c_dma_dev);
-        platform_device_register(&alchemy_ac97c_dev);
-        platform_device_register(&db1x00_audio_dev);
+                c1, d1, /*s1*/0, 0, 1);
 
+        platform_add_devices(db1x00_devs, ARRAY_SIZE(db1x00_devs));
         db1x_register_norflash(32 << 20, 4 /* 32bit */, F_SWAPPED);
         return 0;
 }
-device_initcall(db1xxx_dev_init);
+device_initcall(db1000_dev_init);
diff --git a/arch/mips/alchemy/devboards/prom.c b/arch/mips/alchemy/devboards/prom.c
index 3a73f9663b0f..93a22107cc41 100644
--- a/arch/mips/alchemy/devboards/prom.c
+++ b/arch/mips/alchemy/devboards/prom.c
@@ -34,8 +34,8 @@
 #include <prom.h>
 
 #if defined(CONFIG_MIPS_DB1000) || \
-    defined(CONFIG_MIPS_PB1100) || defined(CONFIG_MIPS_DB1100) || \
-    defined(CONFIG_MIPS_PB1500) || defined(CONFIG_MIPS_DB1500)
+    defined(CONFIG_MIPS_PB1100) || \
+    defined(CONFIG_MIPS_PB1500)
 #define ALCHEMY_BOARD_DEFAULT_MEMSIZE   0x04000000
 
 #else   /* Au1550/Au1200-based develboards */