[ar71xx] add parallel flash driver
authorGabor Juhos <juhosg@openwrt.org>
Sat, 6 Jun 2009 08:41:47 +0000 (08:41 +0000)
committerGabor Juhos <juhosg@openwrt.org>
Sat, 6 Jun 2009 08:41:47 +0000 (08:41 +0000)
SVN-Revision: 16353

target/linux/ar71xx/config-2.6.28
target/linux/ar71xx/config-2.6.29
target/linux/ar71xx/config-2.6.30
target/linux/ar71xx/files/arch/mips/ar71xx/mach-ap83.c
target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/platform.h
target/linux/ar71xx/files/drivers/mtd/maps/ar91xx_flash.c [new file with mode: 0644]
target/linux/ar71xx/patches-2.6.28/007-ar91xx_flash_driver.patch [new file with mode: 0644]
target/linux/ar71xx/patches-2.6.29/007-ar91xx_flash_driver.patch [new file with mode: 0644]
target/linux/ar71xx/patches-2.6.30/007-ar91xx_flash_driver.patch [new file with mode: 0644]

index 6148e60..824dd3b 100644 (file)
@@ -121,8 +121,8 @@ CONFIG_MIPS_MT_DISABLED=y
 # CONFIG_MIPS_MT_SMP is not set
 # CONFIG_MIPS_MT_SMTC is not set
 # CONFIG_MIPS_SIM is not set
+CONFIG_MTD_AR91XX_FLASH=y
 # CONFIG_MTD_CFI is not set
-# CONFIG_MTD_COMPLEX_MAPPINGS is not set
 CONFIG_MTD_CONCAT=y
 CONFIG_MTD_M25P80=y
 CONFIG_MTD_MYLOADER_PARTS=y
index 9f54da9..e3e75b0 100644 (file)
@@ -126,8 +126,8 @@ CONFIG_MIPS_MT_DISABLED=y
 # CONFIG_MIPS_MT_SMTC is not set
 # CONFIG_MIPS_SIM is not set
 CONFIG_MISC_FILESYSTEMS=y
+CONFIG_MTD_AR91XX_FLASH=y
 # CONFIG_MTD_CFI is not set
-# CONFIG_MTD_COMPLEX_MAPPINGS is not set
 CONFIG_MTD_CONCAT=y
 CONFIG_MTD_M25P80=y
 CONFIG_MTD_NAND=y
index 3d60d4c..b1e0c4e 100644 (file)
@@ -134,8 +134,8 @@ CONFIG_MIPS_MT_DISABLED=y
 # CONFIG_MIPS_MT_SMP is not set
 # CONFIG_MIPS_MT_SMTC is not set
 # CONFIG_MIPS_SIM is not set
+CONFIG_MTD_AR91XX_FLASH=y
 # CONFIG_MTD_CFI is not set
-# CONFIG_MTD_COMPLEX_MAPPINGS is not set
 CONFIG_MTD_CONCAT=y
 CONFIG_MTD_M25P80=y
 CONFIG_MTD_NAND=y
index d5a3032..ed5d1a8 100644 (file)
@@ -68,7 +68,7 @@ static struct mtd_partition ap83_flash_partitions[] = {
 };
 #endif /* CONFIG_MTD_PARTITIONS */
 
-static struct physmap_flash_data ap83_flash_data = {
+static struct ar91xx_flash_platform_data ap83_flash_data = {
        .width          = 2,
 #ifdef CONFIG_MTD_PARTITIONS
         .parts          = ap83_flash_partitions,
@@ -85,7 +85,7 @@ static struct resource ap83_flash_resources[] = {
 };
 
 static struct platform_device ap83_flash_device = {
-       .name           = "physmap-flash",
+       .name           = "ar91xx-flash",
        .id             = -1,
        .resource       = ap83_flash_resources,
        .num_resources  = ARRAY_SIZE(ap83_flash_resources),
index 55c62b7..b008abd 100644 (file)
@@ -16,6 +16,8 @@
 #include <linux/skbuff.h>
 #include <linux/phy.h>
 #include <linux/spi/spi.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
 
 struct ag71xx_platform_data {
        phy_interface_t phy_if_mode;
@@ -51,4 +53,12 @@ struct ar71xx_spi_platform_data {
 #define AR71XX_SPI_CS_INACTIVE 0
 #define AR71XX_SPI_CS_ACTIVE   1
 
+struct ar91xx_flash_platform_data {
+       unsigned int            width;
+#ifdef CONFIG_MTD_PARTITIONS
+       unsigned int            nr_parts;
+       struct mtd_partition    *parts;
+#endif
+};
+
 #endif /* __ASM_MACH_AR71XX_PLATFORM_H */
diff --git a/target/linux/ar71xx/files/drivers/mtd/maps/ar91xx_flash.c b/target/linux/ar71xx/files/drivers/mtd/maps/ar91xx_flash.c
new file mode 100644 (file)
index 0000000..e83a147
--- /dev/null
@@ -0,0 +1,268 @@
+/*
+ * Parallel flash driver for the Atheros AR91xx SoC
+ *
+ * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <linux/io.h>
+
+#include <asm/mach-ar71xx/ar71xx.h>
+#include <asm/mach-ar71xx/platform.h>
+
+#define DRV_NAME       "ar91xx-flash"
+
+struct ar91xx_flash_info {
+       struct mtd_info         *mtd;
+       struct map_info         map;
+#ifdef CONFIG_MTD_PARTITIONS
+       int                     nr_parts;
+       struct mtd_partition    *parts;
+#endif
+};
+
+static map_word ar91xx_flash_read(struct map_info *map, unsigned long ofs)
+{
+       map_word val;
+
+       if (map_bankwidth_is_1(map))
+               val.x[0] = __raw_readb(map->virt + (ofs ^ 3));
+       else if (map_bankwidth_is_2(map))
+               val.x[0] = __raw_readw(map->virt + (ofs ^ 2));
+       else
+               val = map_word_ff(map);
+
+       return val;
+}
+
+static void ar91xx_flash_write(struct map_info *map, map_word d,
+                              unsigned long ofs)
+{
+       if (map_bankwidth_is_1(map))
+               __raw_writeb(d.x[0], map->virt + (ofs ^ 3));
+       else if (map_bankwidth_is_2(map))
+               __raw_writew(d.x[0], map->virt + (ofs ^ 2));
+
+       mb();
+}
+
+static int ar91xx_flash_remove(struct platform_device *pdev)
+{
+       struct ar91xx_flash_platform_data *pdata;
+       struct ar91xx_flash_info *info;
+
+       info = platform_get_drvdata(pdev);
+       if (info == NULL)
+               return 0;
+
+       platform_set_drvdata(pdev, NULL);
+
+       if (info->mtd == NULL)
+               return 0;
+
+       pdata = pdev->dev.platform_data;
+#ifdef CONFIG_MTD_PARTITIONS
+       if (info->nr_parts) {
+               del_mtd_partitions(info->mtd);
+               kfree(info->parts);
+       } else if (pdata->nr_parts) {
+               del_mtd_partitions(info->mtd);
+       } else {
+               del_mtd_device(info->mtd);
+       }
+#else
+       del_mtd_device(info->mtd);
+#endif
+       map_destroy(info->mtd);
+
+       return 0;
+}
+
+static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", NULL };
+#ifdef CONFIG_MTD_PARTITIONS
+static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL };
+#endif
+
+static int ar91xx_flash_probe(struct platform_device *pdev)
+{
+       struct ar91xx_flash_platform_data *pdata;
+       struct ar91xx_flash_info *info;
+       struct resource *res;
+       struct resource *region;
+       const char **probe_type;
+       int err = 0;
+
+       pdata = pdev->dev.platform_data;
+       if (pdata == NULL)
+               return -EINVAL;
+
+       info = devm_kzalloc(&pdev->dev, sizeof(struct ar91xx_flash_info),
+                           GFP_KERNEL);
+       if (info == NULL) {
+               err = -ENOMEM;
+               goto err_out;
+       }
+
+       platform_set_drvdata(pdev, info);
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (res == NULL) {
+               err = -ENOENT;
+               goto err_out;
+       }
+
+       dev_info(&pdev->dev, "%.8llx at %.8llx\n",
+                (unsigned long long)(res->end - res->start + 1),
+                (unsigned long long)res->start);
+
+       region = devm_request_mem_region(&pdev->dev,
+                                        res->start, res->end - res->start + 1,
+                                        dev_name(&pdev->dev));
+       if (region == NULL) {
+               dev_err(&pdev->dev, "could not reserve memory region\n");
+               err = -ENOMEM;
+               goto err_out;
+       }
+
+       info->map.name = dev_name(&pdev->dev);
+       info->map.phys = res->start;
+       info->map.size = res->end - res->start + 1;
+       info->map.bankwidth = pdata->width;
+
+       info->map.virt = devm_ioremap(&pdev->dev, info->map.phys,
+                                     info->map.size);
+       if (info->map.virt == NULL) {
+               dev_err(&pdev->dev, "failed to ioremap flash region\n");
+               err = -EIO;
+               goto err_out;
+       }
+
+       simple_map_init(&info->map);
+       info->map.read = ar91xx_flash_read;
+       info->map.write = ar91xx_flash_write;
+
+       probe_type = rom_probe_types;
+       for (; info->mtd == NULL && *probe_type != NULL; probe_type++)
+               info->mtd = do_map_probe(*probe_type, &info->map);
+
+       if (info->mtd == NULL) {
+               dev_err(&pdev->dev, "map_probe failed\n");
+               err = -ENXIO;
+               goto err_out;
+       }
+
+       info->mtd->owner = THIS_MODULE;
+
+#ifdef CONFIG_MTD_PARTITIONS
+       if (pdata->nr_parts) {
+               dev_info(&pdev->dev, "using static partition mapping\n");
+               add_mtd_partitions(info->mtd, pdata->parts, pdata->nr_parts);
+               return 0;
+       }
+
+       err = parse_mtd_partitions(info->mtd, part_probe_types,
+                                  &info->parts, 0);
+       if (err > 0) {
+               add_mtd_partitions(info->mtd, info->parts, err);
+               return 0;
+       }
+#endif
+
+       add_mtd_device(info->mtd);
+       return 0;
+
+ err_out:
+       ar91xx_flash_remove(pdev);
+       return err;
+}
+
+#ifdef CONFIG_PM
+static int ar91xx_flash_suspend(struct platform_device *dev, pm_message_t state)
+{
+       struct ar91xx_flash_info *info = platform_get_drvdata(dev);
+       int ret = 0;
+
+       if (info->mtd->suspend)
+               ret = info->mtd->suspend(info->mtd);
+
+       if (ret)
+               goto fail;
+
+       return 0;
+
+ fail:
+       if (info->mtd->suspend) {
+               BUG_ON(!info->mtd->resume);
+               info->mtd->resume(info->mtd);
+       }
+
+       return ret;
+}
+
+static int ar91xx_flash_resume(struct platform_device *pdev)
+{
+       struct ar91xx_flash_info *info = platform_get_drvdata(pdev);
+
+       if (info->mtd->resume)
+               info->mtd->resume(info->mtd);
+
+       return 0;
+}
+
+static void ar91xx_flash_shutdown(struct platform_device *pdev)
+{
+       struct ar91xx_flash_info *info = platform_get_drvdata(pdev);
+
+       if (info->mtd->suspend && info->mtd->resume)
+               if (info->mtd->suspend(info->mtd) == 0)
+                       info->mtd->resume(info->mtd);
+}
+#else
+#define ar91xx_flash_suspend   NULL
+#define ar91xx_flash_resume    NULL
+#define ar91xx_flash_shutdown  NULL
+#endif
+
+static struct platform_driver ar91xx_flash_driver = {
+       .probe          = ar91xx_flash_probe,
+       .remove         = ar91xx_flash_remove,
+       .suspend        = ar91xx_flash_suspend,
+       .resume         = ar91xx_flash_resume,
+       .shutdown       = ar91xx_flash_shutdown,
+       .driver         = {
+               .name   = DRV_NAME,
+               .owner  = THIS_MODULE,
+       },
+};
+
+static int __init ar91xx_flash_init(void)
+{
+       return platform_driver_register(&ar91xx_flash_driver);
+}
+
+static void __exit ar91xx_flash_exit(void)
+{
+       platform_driver_unregister(&ar91xx_flash_driver);
+}
+
+module_init(ar91xx_flash_init);
+module_exit(ar91xx_flash_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
+MODULE_DESCRIPTION("Parallel flash driver for the Atheros AR91xx SoC");
+MODULE_ALIAS("platform:" DRV_NAME);
diff --git a/target/linux/ar71xx/patches-2.6.28/007-ar91xx_flash_driver.patch b/target/linux/ar71xx/patches-2.6.28/007-ar91xx_flash_driver.patch
new file mode 100644 (file)
index 0000000..3219ff3
--- /dev/null
@@ -0,0 +1,26 @@
+--- a/drivers/mtd/maps/Kconfig
++++ b/drivers/mtd/maps/Kconfig
+@@ -257,6 +257,13 @@ config MTD_ALCHEMY
+       help
+         Flash memory access on AMD Alchemy Pb/Db/RDK Reference Boards
++config MTD_AR91XX_FLASH
++      tristate "Atheros AR91xx parallel flash support"
++      depends on ATHEROS_AR71XX
++      select MTD_COMPLEX_MAPPINGS
++      help
++        Parallel flash driver for the Atheros AR91xx based boards.
++
+ config MTD_DILNETPC
+       tristate "CFI Flash device mapped on DIL/Net PC"
+       depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT
+--- a/drivers/mtd/maps/Makefile
++++ b/drivers/mtd/maps/Makefile
+@@ -42,6 +42,7 @@ obj-$(CONFIG_MTD_DBOX2)              += dbox2-flash.
+ obj-$(CONFIG_MTD_SOLUTIONENGINE)+= solutionengine.o
+ obj-$(CONFIG_MTD_PCI)         += pci.o
+ obj-$(CONFIG_MTD_ALCHEMY)       += alchemy-flash.o
++obj-$(CONFIG_MTD_AR91XX_FLASH)        += ar91xx_flash.o
+ obj-$(CONFIG_MTD_AUTCPU12)    += autcpu12-nvram.o
+ obj-$(CONFIG_MTD_EDB7312)     += edb7312.o
+ obj-$(CONFIG_MTD_IMPA7)               += impa7.o
diff --git a/target/linux/ar71xx/patches-2.6.29/007-ar91xx_flash_driver.patch b/target/linux/ar71xx/patches-2.6.29/007-ar91xx_flash_driver.patch
new file mode 100644 (file)
index 0000000..943af6e
--- /dev/null
@@ -0,0 +1,26 @@
+--- a/drivers/mtd/maps/Kconfig
++++ b/drivers/mtd/maps/Kconfig
+@@ -268,6 +268,13 @@ config MTD_ALCHEMY
+       help
+         Flash memory access on AMD Alchemy Pb/Db/RDK Reference Boards
++config MTD_AR91XX_FLASH
++      tristate "Atheros AR91xx parallel flash support"
++      depends on ATHEROS_AR71XX
++      select MTD_COMPLEX_MAPPINGS
++      help
++        Parallel flash driver for the Atheros AR91xx based boards.
++
+ config MTD_DILNETPC
+       tristate "CFI Flash device mapped on DIL/Net PC"
+       depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT
+--- a/drivers/mtd/maps/Makefile
++++ b/drivers/mtd/maps/Makefile
+@@ -42,6 +42,7 @@ obj-$(CONFIG_MTD_DBOX2)              += dbox2-flash.
+ obj-$(CONFIG_MTD_SOLUTIONENGINE)+= solutionengine.o
+ obj-$(CONFIG_MTD_PCI)         += pci.o
+ obj-$(CONFIG_MTD_ALCHEMY)       += alchemy-flash.o
++obj-$(CONFIG_MTD_AR91XX_FLASH)        += ar91xx_flash.o
+ obj-$(CONFIG_MTD_AUTCPU12)    += autcpu12-nvram.o
+ obj-$(CONFIG_MTD_EDB7312)     += edb7312.o
+ obj-$(CONFIG_MTD_IMPA7)               += impa7.o
diff --git a/target/linux/ar71xx/patches-2.6.30/007-ar91xx_flash_driver.patch b/target/linux/ar71xx/patches-2.6.30/007-ar91xx_flash_driver.patch
new file mode 100644 (file)
index 0000000..943af6e
--- /dev/null
@@ -0,0 +1,26 @@
+--- a/drivers/mtd/maps/Kconfig
++++ b/drivers/mtd/maps/Kconfig
+@@ -268,6 +268,13 @@ config MTD_ALCHEMY
+       help
+         Flash memory access on AMD Alchemy Pb/Db/RDK Reference Boards
++config MTD_AR91XX_FLASH
++      tristate "Atheros AR91xx parallel flash support"
++      depends on ATHEROS_AR71XX
++      select MTD_COMPLEX_MAPPINGS
++      help
++        Parallel flash driver for the Atheros AR91xx based boards.
++
+ config MTD_DILNETPC
+       tristate "CFI Flash device mapped on DIL/Net PC"
+       depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT
+--- a/drivers/mtd/maps/Makefile
++++ b/drivers/mtd/maps/Makefile
+@@ -42,6 +42,7 @@ obj-$(CONFIG_MTD_DBOX2)              += dbox2-flash.
+ obj-$(CONFIG_MTD_SOLUTIONENGINE)+= solutionengine.o
+ obj-$(CONFIG_MTD_PCI)         += pci.o
+ obj-$(CONFIG_MTD_ALCHEMY)       += alchemy-flash.o
++obj-$(CONFIG_MTD_AR91XX_FLASH)        += ar91xx_flash.o
+ obj-$(CONFIG_MTD_AUTCPU12)    += autcpu12-nvram.o
+ obj-$(CONFIG_MTD_EDB7312)     += edb7312.o
+ obj-$(CONFIG_MTD_IMPA7)               += impa7.o