[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>

diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
index 0f24b4f..b65d3e0 100644 (file)
--- a/arch/avr32/mach-at32ap/at32ap700x.c
+++ b/arch/avr32/mach-at32ap/at32ap700x.c
@@ -1729,6 +1729,58 @@ 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
  * -------------------------------------------------------------------- */

diff --git a/include/asm-avr32/arch-at32ap/board.h b/include/asm-avr32/arch-at32ap/board.h
index a4e2d28..cc5906c 100644 (file)
--- 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 */