diff options
Diffstat (limited to 'arch/arm/mach-omap2/gpmc-nand.c')
| -rw-r--r-- | arch/arm/mach-omap2/gpmc-nand.c | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/arch/arm/mach-omap2/gpmc-nand.c b/arch/arm/mach-omap2/gpmc-nand.c deleted file mode 100644 index f6ac027..0000000 --- a/arch/arm/mach-omap2/gpmc-nand.c +++ /dev/null @@ -1,154 +0,0 @@ -/* - * gpmc-nand.c - * - * Copyright (C) 2009 Texas Instruments - * Vimal Singh <vimalsingh@ti.com> - * - * 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/kernel.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/omap-gpmc.h> -#include <linux/mtd/nand.h> -#include <linux/platform_data/mtd-nand-omap2.h> - -#include <asm/mach/flash.h> - -#include "soc.h" - -/* minimum size for IO mapping */ -#define NAND_IO_SIZE 4 - -static bool gpmc_hwecc_bch_capable(enum omap_ecc ecc_opt) -{ - /* platforms which support all ECC schemes */ - if (soc_is_am33xx() || soc_is_am43xx() || cpu_is_omap44xx() || - soc_is_omap54xx() || soc_is_dra7xx()) - return 1; - - if (ecc_opt == OMAP_ECC_BCH4_CODE_HW_DETECTION_SW || - ecc_opt == OMAP_ECC_BCH8_CODE_HW_DETECTION_SW) { - if (cpu_is_omap24xx()) - return 0; - else if (cpu_is_omap3630() && (GET_OMAP_REVISION() == 0)) - return 0; - else - return 1; - } - - /* OMAP3xxx do not have ELM engine, so cannot support ECC schemes - * which require H/W based ECC error detection */ - if ((cpu_is_omap34xx() || cpu_is_omap3630()) && - ((ecc_opt == OMAP_ECC_BCH4_CODE_HW) || - (ecc_opt == OMAP_ECC_BCH8_CODE_HW))) - return 0; - - /* legacy platforms support only HAM1 (1-bit Hamming) ECC scheme */ - if (ecc_opt == OMAP_ECC_HAM1_CODE_HW || - ecc_opt == OMAP_ECC_HAM1_CODE_SW) - return 1; - else - return 0; -} - -/* This function will go away once the device-tree convertion is complete */ -static void gpmc_set_legacy(struct omap_nand_platform_data *gpmc_nand_data, - struct gpmc_settings *s) -{ - /* Enable RD PIN Monitoring Reg */ - if (gpmc_nand_data->dev_ready) { - s->wait_on_read = true; - s->wait_on_write = true; - } - - if (gpmc_nand_data->devsize == NAND_BUSWIDTH_16) - s->device_width = GPMC_DEVWIDTH_16BIT; - else - s->device_width = GPMC_DEVWIDTH_8BIT; -} - -int gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data, - struct gpmc_timings *gpmc_t) -{ - int err = 0; - struct gpmc_settings s; - struct platform_device *pdev; - struct resource gpmc_nand_res[] = { - { .flags = IORESOURCE_MEM, }, - { .flags = IORESOURCE_IRQ, }, - { .flags = IORESOURCE_IRQ, }, - }; - - BUG_ON(gpmc_nand_data->cs >= GPMC_CS_NUM); - - err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE, - (unsigned long *)&gpmc_nand_res[0].start); - if (err < 0) { - pr_err("omap2-gpmc: Cannot request GPMC CS %d, error %d\n", - gpmc_nand_data->cs, err); - return err; - } - gpmc_nand_res[0].end = gpmc_nand_res[0].start + NAND_IO_SIZE - 1; - gpmc_nand_res[1].start = gpmc_get_client_irq(GPMC_IRQ_FIFOEVENTENABLE); - gpmc_nand_res[2].start = gpmc_get_client_irq(GPMC_IRQ_COUNT_EVENT); - - memset(&s, 0, sizeof(struct gpmc_settings)); - gpmc_set_legacy(gpmc_nand_data, &s); - - s.device_nand = true; - - if (gpmc_t) { - err = gpmc_cs_set_timings(gpmc_nand_data->cs, gpmc_t, &s); - if (err < 0) { - pr_err("omap2-gpmc: Unable to set gpmc timings: %d\n", - err); - return err; - } - } - - err = gpmc_cs_program_settings(gpmc_nand_data->cs, &s); - if (err < 0) - goto out_free_cs; - - err = gpmc_configure(GPMC_CONFIG_WP, 0); - if (err < 0) - goto out_free_cs; - - if (!gpmc_hwecc_bch_capable(gpmc_nand_data->ecc_opt)) { - pr_err("omap2-nand: Unsupported NAND ECC scheme selected\n"); - err = -EINVAL; - goto out_free_cs; - } - - - pdev = platform_device_alloc("omap2-nand", gpmc_nand_data->cs); - if (pdev) { - err = platform_device_add_resources(pdev, gpmc_nand_res, - ARRAY_SIZE(gpmc_nand_res)); - if (!err) - pdev->dev.platform_data = gpmc_nand_data; - } else { - err = -ENOMEM; - } - if (err) - goto out_free_pdev; - - err = platform_device_add(pdev); - if (err) { - dev_err(&pdev->dev, "Unable to register NAND device\n"); - goto out_free_pdev; - } - - return 0; - -out_free_pdev: - platform_device_put(pdev); -out_free_cs: - gpmc_cs_free(gpmc_nand_data->cs); - - return err; -} |
