--- /dev/null
+/*
+ * 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 <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;
+}
#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
struct omap_nand_info *info;
struct omap_nand_platform_data *pdata;
int err;
- unsigned long val;
-
pdata = pdev->dev.platform_data;
if (pdata == NULL) {
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);
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);
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;
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);
projects / karo-tx-linux.git / commitdiff