>From 2cf160e424cdb4efa29e1078841a649a44f50c79 Mon Sep 17 00:00:00 2001 From: Vimal Singh <vimalsingh@xxxxxx> Date: Wed, 10 Feb 2010 18:22:54 -0800 Subject: [PATCH] omap2/3/4: Introducing 'gpmc-nand.c' for GPMC specific NAND init Introducing 'gpmc-nand.c' for GPMC specific NAND init. For example: GPMC timing parameters and all. This patch also migrates gpmc related calls from 'nand/omap2.c' to 'gpmc-nand.c'. Signed-off-by: Vimal Singh <vimalsingh@xxxxxx> Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx> diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index 492cf16..0b17dca 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -135,5 +135,8 @@ obj-y += usb-ehci.o onenand-$(CONFIG_MTD_ONENAND_OMAP2) := gpmc-onenand.o obj-y += $(onenand-m) $(onenand-y) +nand-$(CONFIG_MTD_NAND_OMAP2) := gpmc-nand.o +obj-y += $(nand-m) $(nand-y) + smc91x-$(CONFIG_SMC91X) := gpmc-smc91x.o obj-y += $(smc91x-m) $(smc91x-y) diff --git a/arch/arm/mach-omap2/gpmc-nand.c b/arch/arm/mach-omap2/gpmc-nand.c new file mode 100644 index 0000000..64d74f0 --- /dev/null +++ b/arch/arm/mach-omap2/gpmc-nand.c @@ -0,0 +1,139 @@ +/* + * gpmc-nand.c + * + * Copyright (C) 2009 Texas Instruments + * Vimal Singh <vimalsingh@xxxxxx> + * + * 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 <asm/mach/flash.h> + +#include <plat/nand.h> +#include <plat/board.h> +#include <plat/gpmc.h> + +#define WR_RD_PIN_MONITORING 0x00600000 + +static struct omap_nand_platform_data *gpmc_nand_data; + +static struct resource gpmc_nand_resource = { + .flags = IORESOURCE_MEM, +}; + +static struct platform_device gpmc_nand_device = { + .name = "omap2-nand", + .id = 0, + .num_resources = 1, + .resource = &gpmc_nand_resource, +}; + +static int omap2_nand_gpmc_retime(void) +{ + struct gpmc_timings t; + int err; + + memset(&t, 0, sizeof(t)); + t.sync_clk = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->sync_clk); + t.cs_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_on); + t.adv_on = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->adv_on); + + /* Read */ + t.adv_rd_off = gpmc_round_ns_to_ticks( + gpmc_nand_data->gpmc_t->adv_rd_off); + t.oe_on = t.adv_on; + t.access = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->access); + t.oe_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->oe_off); + t.cs_rd_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_rd_off); + t.rd_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->rd_cycle); + + /* Write */ + t.adv_wr_off = gpmc_round_ns_to_ticks( + gpmc_nand_data->gpmc_t->adv_wr_off); + t.we_on = t.oe_on; + if (cpu_is_omap34xx()) { + t.wr_data_mux_bus = gpmc_round_ns_to_ticks( + gpmc_nand_data->gpmc_t->wr_data_mux_bus); + t.wr_access = gpmc_round_ns_to_ticks( + gpmc_nand_data->gpmc_t->wr_access); + } + t.we_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->we_off); + t.cs_wr_off = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->cs_wr_off); + t.wr_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->wr_cycle); + + /* Configure GPMC */ + gpmc_cs_write_reg(gpmc_nand_data->cs, GPMC_CS_CONFIG1, + GPMC_CONFIG1_DEVICESIZE(gpmc_nand_data->devsize) | + GPMC_CONFIG1_DEVICETYPE_NAND); + + err = gpmc_cs_set_timings(gpmc_nand_data->cs, &t); + if (err) + return err; + + return 0; +} + +static int gpmc_nand_setup(void) +{ + struct device *dev = &gpmc_nand_device.dev; + + /* Set timings in GPMC */ + if (omap2_nand_gpmc_retime() < 0) { + dev_err(dev, "Unable to set gpmc timings\n"); + return -EINVAL; + } + + return 0; +} + +int __init gpmc_nand_init(struct omap_nand_platform_data *_nand_data) +{ + unsigned int val; + int err = 0; + struct device *dev = &gpmc_nand_device.dev; + + gpmc_nand_data = _nand_data; + gpmc_nand_data->nand_setup = gpmc_nand_setup; + gpmc_nand_device.dev.platform_data = gpmc_nand_data; + + err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE, + &gpmc_nand_data->phys_base); + if (err < 0) { + dev_err(dev, "Cannot request GPMC CS\n"); + return err; + } + + err = gpmc_nand_setup(); + if (err < 0) { + dev_err(dev, "NAND platform setup failed: %d\n", err); + return err; + } + + /* Enable RD PIN Monitoring Reg */ + if (gpmc_nand_data->dev_ready) { + val = gpmc_cs_read_reg(gpmc_nand_data->cs, + GPMC_CS_CONFIG1); + val |= WR_RD_PIN_MONITORING; + gpmc_cs_write_reg(gpmc_nand_data->cs, + GPMC_CS_CONFIG1, val); + } + + err = platform_device_register(&gpmc_nand_device); + if (err < 0) { + dev_err(dev, "Unable to register NAND device\n"); + goto out_free_cs; + } + + return 0; + +out_free_cs: + gpmc_cs_free(gpmc_nand_data->cs); + + return err; +} diff --git a/arch/arm/plat-omap/include/plat/nand.h b/arch/arm/plat-omap/include/plat/nand.h index 631a7be..6ba88d2 100644 --- a/arch/arm/plat-omap/include/plat/nand.h +++ b/arch/arm/plat-omap/include/plat/nand.h @@ -15,10 +15,18 @@ struct omap_nand_platform_data { int cs; int gpio_irq; struct mtd_partition *parts; + struct gpmc_timings *gpmc_t; int nr_parts; - int (*nand_setup)(void __iomem *); + int (*nand_setup)(void); int (*dev_ready)(struct omap_nand_platform_data *); int dma_channel; + unsigned long phys_base; void __iomem *gpmc_cs_baseaddr; void __iomem *gpmc_baseaddr; + int devsize; }; + +/* size (4 KiB) for IO mapping */ +#define NAND_IO_SIZE SZ_4K + +extern int gpmc_nand_init(struct omap_nand_platform_data *d); diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c index 1bb799f..26aec00 100644 --- a/drivers/mtd/nand/omap2.c +++ b/drivers/mtd/nand/omap2.c @@ -30,12 +30,8 @@ #define DRIVER_NAME "omap2-nand" -/* size (4 KiB) for IO mapping */ -#define NAND_IO_SIZE SZ_4K - #define NAND_WP_OFF 0 #define NAND_WP_BIT 0x00000010 -#define WR_RD_PIN_MONITORING 0x00600000 #define GPMC_BUF_FULL 0x00000001 #define GPMC_BUF_EMPTY 0x00000000 @@ -882,8 +878,6 @@ static int __devinit omap_nand_probe(struct platform_device *pdev) struct omap_nand_info *info; struct omap_nand_platform_data *pdata; int err; - unsigned long val; - pdata = pdev->dev.platform_data; if (pdata == NULL) { @@ -905,28 +899,14 @@ static int __devinit omap_nand_probe(struct platform_device *pdev) info->gpmc_cs = pdata->cs; info->gpmc_baseaddr = pdata->gpmc_baseaddr; info->gpmc_cs_baseaddr = pdata->gpmc_cs_baseaddr; + info->phys_base = pdata->phys_base; info->mtd.priv = &info->nand; info->mtd.name = dev_name(&pdev->dev); info->mtd.owner = THIS_MODULE; - err = gpmc_cs_request(info->gpmc_cs, NAND_IO_SIZE, &info->phys_base); - if (err < 0) { - dev_err(&pdev->dev, "Cannot request GPMC CS\n"); - goto out_free_info; - } - - /* Enable RD PIN Monitoring Reg */ - if (pdata->dev_ready) { - val = gpmc_cs_read_reg(info->gpmc_cs, GPMC_CS_CONFIG1); - val |= WR_RD_PIN_MONITORING; - gpmc_cs_write_reg(info->gpmc_cs, GPMC_CS_CONFIG1, val); - } - - val = gpmc_cs_read_reg(info->gpmc_cs, GPMC_CS_CONFIG7); - val &= ~(0xf << 8); - val |= (0xc & 0xf) << 8; - gpmc_cs_write_reg(info->gpmc_cs, GPMC_CS_CONFIG7, val); + info->nand.options |= pdata->devsize ? NAND_BUSWIDTH_16 : 0; + info->nand.options |= NAND_SKIP_BBTSCAN; /* NAND write protect off */ omap_nand_wp(&info->mtd, NAND_WP_OFF); @@ -934,7 +914,7 @@ static int __devinit omap_nand_probe(struct platform_device *pdev) if (!request_mem_region(info->phys_base, NAND_IO_SIZE, pdev->dev.driver->name)) { err = -EBUSY; - goto out_free_cs; + goto out_free_info; } info->nand.IO_ADDR_R = ioremap(info->phys_base, NAND_IO_SIZE); @@ -963,11 +943,6 @@ static int __devinit omap_nand_probe(struct platform_device *pdev) info->nand.chip_delay = 50; } - info->nand.options |= NAND_SKIP_BBTSCAN; - if ((gpmc_cs_read_reg(info->gpmc_cs, GPMC_CS_CONFIG1) & 0x3000) - == 0x1000) - info->nand.options |= NAND_BUSWIDTH_16; - if (use_prefetch) { /* copy the virtual address of nand base for fifo access */ info->nand_pref_fifo_add = info->nand.IO_ADDR_R; @@ -1043,8 +1018,6 @@ static int __devinit omap_nand_probe(struct platform_device *pdev) out_release_mem_region: release_mem_region(info->phys_base, NAND_IO_SIZE); -out_free_cs: - gpmc_cs_free(info->gpmc_cs); out_free_info: kfree(info); -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html