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

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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>
This commit is contained in:
Håvard Skinnemoen 2008-06-06 18:04:56 +02:00 committed by David Woodhouse
parent e1677ce4e4
commit 62090a08ab
2 changed files with 65 additions and 0 deletions
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52
arch/avr32/mach-at32ap/at32ap700x.c
View File

@ -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
* -------------------------------------------------------------------- */

13
include/asm-avr32/arch-at32ap/board.h
View File

@ -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 */