MIPS: Alchemy: physmap-flash for all devboards

Replace the devboard NOR MTD mapping driver with physmap-flash support.
Also honor the "swapboot" switch settings wrt. to the layout of the
NOR partitions.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Acked-By: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

8 files changed, 163 insertions, 0 deletions

diff --git a/arch/mips/alchemy/devboards/db1x00/platform.c b/arch/mips/alchemy/devboards/db1x00/platform.c
index 0ac5dd05d3c..62e2a96fe11 100644
--- a/arch/mips/alchemy/devboards/db1x00/platform.c
+++ b/arch/mips/alchemy/devboards/db1x00/platform.c
@@ -22,6 +22,7 @@
 #include <linux/platform_device.h>
 
 #include <asm/mach-au1x00/au1xxx.h>
+#include <asm/mach-db1x00/bcsr.h>
 #include "../platform.h"
 
 /* DB1xxx PCMCIA interrupt sources:
@@ -32,6 +33,7 @@
  */
 
 #define DB1XXX_HAS_PCMCIA
+#define F_SWAPPED (bcsr_read(BCSR_STATUS) & BCSR_STATUS_DB1000_SWAPBOOT)
 
 #if defined(CONFIG_MIPS_DB1000)
 #define DB1XXX_PCMCIA_CD0       AU1000_GPIO0_INT
@@ -40,6 +42,8 @@
 #define DB1XXX_PCMCIA_CD1       AU1000_GPIO3_INT
 #define DB1XXX_PCMCIA_STSCHG1   AU1000_GPIO4_INT
 #define DB1XXX_PCMCIA_CARD1     AU1000_GPIO5_INT
+#define BOARD_FLASH_SIZE        0x02000000 /* 32MB */
+#define BOARD_FLASH_WIDTH       4 /* 32-bits */
 #elif defined(CONFIG_MIPS_DB1100)
 #define DB1XXX_PCMCIA_CD0       AU1100_GPIO0_INT
 #define DB1XXX_PCMCIA_STSCHG0   AU1100_GPIO1_INT
@@ -47,6 +51,8 @@
 #define DB1XXX_PCMCIA_CD1       AU1100_GPIO3_INT
 #define DB1XXX_PCMCIA_STSCHG1   AU1100_GPIO4_INT
 #define DB1XXX_PCMCIA_CARD1     AU1100_GPIO5_INT
+#define BOARD_FLASH_SIZE        0x02000000 /* 32MB */
+#define BOARD_FLASH_WIDTH       4 /* 32-bits */
 #elif defined(CONFIG_MIPS_DB1500)
 #define DB1XXX_PCMCIA_CD0       AU1500_GPIO0_INT
 #define DB1XXX_PCMCIA_STSCHG0   AU1500_GPIO1_INT
@@ -54,6 +60,8 @@
 #define DB1XXX_PCMCIA_CD1       AU1500_GPIO3_INT
 #define DB1XXX_PCMCIA_STSCHG1   AU1500_GPIO4_INT
 #define DB1XXX_PCMCIA_CARD1     AU1500_GPIO5_INT
+#define BOARD_FLASH_SIZE        0x02000000 /* 32MB */
+#define BOARD_FLASH_WIDTH       4 /* 32-bits */
 #elif defined(CONFIG_MIPS_DB1550)
 #define DB1XXX_PCMCIA_CD0       AU1550_GPIO0_INT
 #define DB1XXX_PCMCIA_STSCHG0   AU1550_GPIO21_INT
@@ -61,9 +69,20 @@
 #define DB1XXX_PCMCIA_CD1       AU1550_GPIO1_INT
 #define DB1XXX_PCMCIA_STSCHG1   AU1550_GPIO22_INT
 #define DB1XXX_PCMCIA_CARD1     AU1550_GPIO5_INT
+#define BOARD_FLASH_SIZE        0x08000000 /* 128MB */
+#define BOARD_FLASH_WIDTH       4 /* 32-bits */
 #else
 /* other board: no PCMCIA */
 #undef DB1XXX_HAS_PCMCIA
+#undef F_SWAPPED
+#define F_SWAPPED 0
+#if defined(CONFIG_MIPS_BOSPORUS)
+#define BOARD_FLASH_SIZE        0x01000000 /* 16MB */
+#define BOARD_FLASH_WIDTH       2 /* 16-bits */
+#elif defined(CONFIG_MIPS_MIRAGE)
+#define BOARD_FLASH_SIZE        0x04000000 /* 64MB */
+#define BOARD_FLASH_WIDTH       4 /* 32-bits */
+#endif
 #endif
 
 static int __init db1xxx_dev_init(void)
@@ -93,6 +112,7 @@ static int __init db1xxx_dev_init(void)
                                     0,
                                     1);
 #endif
+        db1x_register_norflash(BOARD_FLASH_SIZE, BOARD_FLASH_WIDTH, F_SWAPPED);
         return 0;
 }
 device_initcall(db1xxx_dev_init);
diff --git a/arch/mips/alchemy/devboards/pb1000/board_setup.c b/arch/mips/alchemy/devboards/pb1000/board_setup.c
index 50fff504ae0..28b8bd278a1 100644
--- a/arch/mips/alchemy/devboards/pb1000/board_setup.c
+++ b/arch/mips/alchemy/devboards/pb1000/board_setup.c
@@ -31,6 +31,7 @@
 #include <asm/mach-pb1x00/pb1000.h>
 #include <prom.h>
 
+#include "../platform.h"
 
 const char *get_system_type(void)
 {
@@ -194,3 +195,9 @@ static int __init pb1000_init_irq(void)
         return 0;
 }
 arch_initcall(pb1000_init_irq);
+
+static int __init pb1000_device_init(void)
+{
+        return db1x_register_norflash(8 * 1024 * 1024, 4, 0);
+}
+device_initcall(pb1000_device_init);
diff --git a/arch/mips/alchemy/devboards/pb1100/platform.c b/arch/mips/alchemy/devboards/pb1100/platform.c
index ec932e773a4..bfc5ab6a121 100644
--- a/arch/mips/alchemy/devboards/pb1100/platform.c
+++ b/arch/mips/alchemy/devboards/pb1100/platform.c
@@ -21,11 +21,14 @@
 #include <linux/init.h>
 
 #include <asm/mach-au1x00/au1000.h>
+#include <asm/mach-db1x00/bcsr.h>
 
 #include "../platform.h"
 
 static int __init pb1100_dev_init(void)
 {
+        int swapped;
+
         /* PCMCIA. single socket, identical to Pb1500 */
         db1x_register_pcmcia_socket(PCMCIA_ATTR_PSEUDO_PHYS,
                                     PCMCIA_ATTR_PSEUDO_PHYS + 0x00040000 - 1,
@@ -38,6 +41,10 @@ static int __init pb1100_dev_init(void)
                                     /*AU1100_GPIO10_INT*/0, /* stschg */
                                     0,                   /* eject */
                                     0);                  /* id */
+
+        swapped = bcsr_read(BCSR_STATUS) &  BCSR_STATUS_DB1000_SWAPBOOT;
+        db1x_register_norflash(64 * 1024 * 1024, 4, swapped);
+
         return 0;
 }
 device_initcall(pb1100_dev_init);
diff --git a/arch/mips/alchemy/devboards/pb1200/platform.c b/arch/mips/alchemy/devboards/pb1200/platform.c
index c8b7ae3f325..736d647ebe0 100644
--- a/arch/mips/alchemy/devboards/pb1200/platform.c
+++ b/arch/mips/alchemy/devboards/pb1200/platform.c
@@ -172,6 +172,8 @@ static struct platform_device *board_platform_devices[] __initdata = {
 
 static int __init board_register_devices(void)
 {
+        int swapped;
+
 #ifdef CONFIG_MIPS_PB1200
         db1x_register_pcmcia_socket(PCMCIA_ATTR_PSEUDO_PHYS,
                                     PCMCIA_ATTR_PSEUDO_PHYS + 0x00040000 - 1,
@@ -222,6 +224,13 @@ static int __init board_register_devices(void)
                                     1);
 #endif
 
+        swapped = bcsr_read(BCSR_STATUS) &  BCSR_STATUS_DB1200_SWAPBOOT;
+#ifdef CONFIG_MIPS_PB1200
+        db1x_register_norflash(128 * 1024 * 1024, 2, swapped);
+#else
+        db1x_register_norflash(64 * 1024 * 1024, 2, swapped);
+#endif
+
         return platform_add_devices(board_platform_devices,
                                     ARRAY_SIZE(board_platform_devices));
 }
diff --git a/arch/mips/alchemy/devboards/pb1500/platform.c b/arch/mips/alchemy/devboards/pb1500/platform.c
index cdce775e213..529acb78925 100644
--- a/arch/mips/alchemy/devboards/pb1500/platform.c
+++ b/arch/mips/alchemy/devboards/pb1500/platform.c
@@ -20,11 +20,14 @@
 
 #include <linux/init.h>
 #include <asm/mach-au1x00/au1000.h>
+#include <asm/mach-db1x00/bcsr.h>
 
 #include "../platform.h"
 
 static int __init pb1500_dev_init(void)
 {
+        int swapped;
+
         /* PCMCIA. single socket, identical to Pb1500 */
         db1x_register_pcmcia_socket(PCMCIA_ATTR_PSEUDO_PHYS,
                                     PCMCIA_ATTR_PSEUDO_PHYS + 0x00040000 - 1,
@@ -37,6 +40,10 @@ static int __init pb1500_dev_init(void)
                                     /*AU1500_GPIO10_INT*/0, /* stschg */
                                     0,                   /* eject */
                                     0);                  /* id */
+
+        swapped = bcsr_read(BCSR_STATUS) &  BCSR_STATUS_DB1000_SWAPBOOT;
+        db1x_register_norflash(64 * 1024 * 1024, 4, swapped);
+
         return 0;
 }
 device_initcall(pb1500_dev_init);
diff --git a/arch/mips/alchemy/devboards/pb1550/platform.c b/arch/mips/alchemy/devboards/pb1550/platform.c
index b496fb6de23..461339166a4 100644
--- a/arch/mips/alchemy/devboards/pb1550/platform.c
+++ b/arch/mips/alchemy/devboards/pb1550/platform.c
@@ -22,11 +22,14 @@
 
 #include <asm/mach-au1x00/au1000.h>
 #include <asm/mach-pb1x00/pb1550.h>
+#include <asm/mach-db1x00/bcsr.h>
 
 #include "../platform.h"
 
 static int __init pb1550_dev_init(void)
 {
+        int swapped;
+
         /* Pb1550, like all others, also has statuschange irqs; however they're
         * wired up on one of the Au1550's shared GPIO201_205 line, which also
         * services the PCMCIA card interrupts.  So we ignore statuschange and
@@ -58,6 +61,9 @@ static int __init pb1550_dev_init(void)
                                     0,
                                     1);
 
+        swapped = bcsr_read(BCSR_STATUS) & BCSR_STATUS_PB1550_SWAPBOOT;
+        db1x_register_norflash(128 * 1024 * 1024, 4, swapped);
+
         return 0;
 }
 device_initcall(pb1550_dev_init);
diff --git a/arch/mips/alchemy/devboards/platform.c b/arch/mips/alchemy/devboards/platform.c
index 48c537cc8ef..7f2bcee7ac3 100644
--- a/arch/mips/alchemy/devboards/platform.c
+++ b/arch/mips/alchemy/devboards/platform.c
@@ -3,6 +3,9 @@
  */
 
 #include <linux/init.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/physmap.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 
@@ -87,3 +90,104 @@ out:
         kfree(sr);
         return ret;
 }
+
+#define YAMON_SIZE      0x00100000
+#define YAMON_ENV_SIZE  0x00040000
+
+int __init db1x_register_norflash(unsigned long size, int width,
+                                  int swapped)
+{
+        struct physmap_flash_data *pfd;
+        struct platform_device *pd;
+        struct mtd_partition *parts;
+        struct resource *res;
+        int ret, i;
+
+        if (size < (8 * 1024 * 1024))
+                return -EINVAL;
+
+        ret = -ENOMEM;
+        parts = kzalloc(sizeof(struct mtd_partition) * 5, GFP_KERNEL);
+        if (!parts)
+                goto out;
+
+        res = kzalloc(sizeof(struct resource), GFP_KERNEL);
+        if (!res)
+                goto out1;
+
+        pfd = kzalloc(sizeof(struct physmap_flash_data), GFP_KERNEL);
+        if (!pfd)
+                goto out2;
+
+        pd = platform_device_alloc("physmap-flash", 0);
+        if (!pd)
+                goto out3;
+
+        /* NOR flash ends at 0x20000000, regardless of size */
+        res->start = 0x20000000 - size;
+        res->end = 0x20000000 - 1;
+        res->flags = IORESOURCE_MEM;
+
+        /* partition setup.  Most Develboards have a switch which allows
+         * to swap the physical locations of the 2 NOR flash banks.
+         */
+        i = 0;
+        if (!swapped) {
+                /* first NOR chip */
+                parts[i].offset = 0;
+                parts[i].name = "User FS";
+                parts[i].size = size / 2;
+                i++;
+        }
+
+        parts[i].offset = MTDPART_OFS_APPEND;
+        parts[i].name = "User FS 2";
+        parts[i].size = (size / 2) - (0x20000000 - 0x1fc00000);
+        i++;
+
+        parts[i].offset = MTDPART_OFS_APPEND;
+        parts[i].name = "YAMON";
+        parts[i].size = YAMON_SIZE;
+        parts[i].mask_flags = MTD_WRITEABLE;
+        i++;
+
+        parts[i].offset = MTDPART_OFS_APPEND;
+        parts[i].name = "raw kernel";
+        parts[i].size = 0x00400000 - YAMON_SIZE - YAMON_ENV_SIZE;
+        i++;
+
+        parts[i].offset = MTDPART_OFS_APPEND;
+        parts[i].name = "YAMON Env";
+        parts[i].size = YAMON_ENV_SIZE;
+        parts[i].mask_flags = MTD_WRITEABLE;
+        i++;
+
+        if (swapped) {
+                parts[i].offset = MTDPART_OFS_APPEND;
+                parts[i].name = "User FS";
+                parts[i].size = size / 2;
+                i++;
+        }
+
+        pfd->width = width;
+        pfd->parts = parts;
+        pfd->nr_parts = 5;
+
+        pd->dev.platform_data = pfd;
+        pd->resource = res;
+        pd->num_resources = 1;
+
+        ret = platform_device_add(pd);
+        if (!ret)
+                return ret;
+
+        platform_device_put(pd);
+out3:
+        kfree(pfd);
+out2:
+        kfree(res);
+out1:
+        kfree(parts);
+out:
+        return ret;
+}
diff --git a/arch/mips/alchemy/devboards/platform.h b/arch/mips/alchemy/devboards/platform.h
index 55ecf7e9258..828c54e3115 100644
--- a/arch/mips/alchemy/devboards/platform.h
+++ b/arch/mips/alchemy/devboards/platform.h
@@ -15,4 +15,7 @@ int __init db1x_register_pcmcia_socket(unsigned long pseudo_attr_start,
                                        int eject_irq,
                                        int id);
 
+int __init db1x_register_norflash(unsigned long size, int width,
+                                  int swapped);
+
 #endif