[MTD] [NAND] avr32: atmel_nand platform code for AT32AP700x

This function initializes and adds a platform_device for a NAND flash
interface on SMC chip select 3.

Signed-off-by: Håvard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

2 files changed, 65 insertions, 0 deletions

diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
index 0f24b4f85c17..b65d3e0667a8 100644
--- a/arch/avr32/mach-at32ap/at32ap700x.c
+++ b/arch/avr32/mach-at32ap/at32ap700x.c
@@ -1730,6 +1730,58 @@ fail:
 #endif
 
 /* --------------------------------------------------------------------
+ * NAND Flash / SmartMedia
+ * -------------------------------------------------------------------- */
+static struct resource smc_cs3_resource[] __initdata = {
+        {
+                .start  = 0x0c000000,
+                .end    = 0x0fffffff,
+                .flags  = IORESOURCE_MEM,
+        }, {
+                .start  = 0xfff03c00,
+                .end    = 0xfff03fff,
+                .flags  = IORESOURCE_MEM,
+        },
+};
+
+struct platform_device *__init
+at32_add_device_nand(unsigned int id, struct atmel_nand_data *data)
+{
+        struct platform_device *pdev;
+
+        if (id != 0 || !data)
+                return NULL;
+
+        pdev = platform_device_alloc("atmel_nand", id);
+        if (!pdev)
+                goto fail;
+
+        if (platform_device_add_resources(pdev, smc_cs3_resource,
+                                ARRAY_SIZE(smc_cs3_resource)))
+                goto fail;
+
+        if (platform_device_add_data(pdev, data,
+                                sizeof(struct atmel_nand_data)))
+                goto fail;
+
+        set_ebi_sfr_bits(HMATRIX_BIT(CS3A));
+        if (data->enable_pin)
+                at32_select_gpio(data->enable_pin,
+                                AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
+        if (data->rdy_pin)
+                at32_select_gpio(data->rdy_pin, 0);
+        if (data->det_pin)
+                at32_select_gpio(data->det_pin, 0);
+
+        platform_device_add(pdev);
+        return pdev;
+
+fail:
+        platform_device_put(pdev);
+        return NULL;
+}
+
+/* --------------------------------------------------------------------
  * AC97C
  * -------------------------------------------------------------------- */
 static struct resource atmel_ac97c0_resource[] __initdata = {
diff --git a/include/asm-avr32/arch-at32ap/board.h b/include/asm-avr32/arch-at32ap/board.h
index a4e2d28bfb58..cc5906cd7419 100644
--- a/include/asm-avr32/arch-at32ap/board.h
+++ b/include/asm-avr32/arch-at32ap/board.h
@@ -85,4 +85,17 @@ struct platform_device *
 at32_add_device_cf(unsigned int id, unsigned int extint,
                 struct cf_platform_data *data);
 
+/* NAND / SmartMedia */
+struct atmel_nand_data {
+        int     enable_pin;     /* chip enable */
+        int     det_pin;        /* card detect */
+        int     rdy_pin;        /* ready/busy */
+        u8      ale;            /* address line number connected to ALE */
+        u8      cle;            /* address line number connected to CLE */
+        u8      bus_width_16;   /* buswidth is 16 bit */
+        struct mtd_partition *(*partition_info)(int size, int *num_partitions);
+};
+struct platform_device *
+at32_add_device_nand(unsigned int id, struct atmel_nand_data *data);
+
 #endif /* __ASM_ARCH_BOARD_H */