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u-boot/board/tqc/tqm85xx/nand.c
Wolfgang Grandegger 16f2f5a351 Add multi-chip NAND support for the TQM8548 modules 
This patches configures the NAND UPM-FSL driver with multi-chip
support for the Micron MT29F8G08FAB NAND flash memory on the
TQM8548 modules.

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
2009-03-23 15:53:41 -05:00

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/*
* (C) Copyright 2008 Wolfgang Grandegger <wg@denx.de>
*
* (C) Copyright 2006
* Thomas Waehner, TQ-System GmbH, thomas.waehner@tqs.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/processor.h>
#include <asm/immap_85xx.h>
#include <asm/processor.h>
#include <asm/mmu.h>
#include <asm/io.h>
#include <asm/errno.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/fsl_upm.h>
#include <ioports.h>
#include <nand.h>
DECLARE_GLOBAL_DATA_PTR;
extern uint get_lbc_clock (void);
/* index of UPM RAM array run pattern for NAND command cycle */
#define CONFIG_SYS_NAN_UPM_WRITE_CMD_OFS 0x08
/* index of UPM RAM array run pattern for NAND address cycle */
#define CONFIG_SYS_NAND_UPM_WRITE_ADDR_OFS 0x10
/* Structure for table with supported UPM timings */
struct upm_freq {
ulong freq;
const u32 *upm_patt;
uchar gpl4_disable;
uchar ehtr;
uchar ead;
};
/* NAND-FLASH UPM tables for TQM85XX according to TQM8548.pq.timing.101.doc */
/* UPM pattern for bus clock = 25 MHz */
static const u32 upm_patt_25[] = {
/* Offset */ /* UPM Read Single RAM array entry -> NAND Read Data */
/* 0x00 */ 0x0ff32000, 0x0fa32000, 0x3fb32005, 0xfffffc00,
/* 0x04 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write CMD */
/* 0x08 */ 0x00ff2c30, 0x00ff2c30, 0x0fff2c35, 0xfffffc00,
/* 0x0C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write ADDR */
/* 0x10 */ 0x00f3ec30, 0x00f3ec30, 0x0ff3ec35, 0xfffffc00,
/* 0x14 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Single RAM array entry -> NAND Write Data */
/* 0x18 */ 0x00f32c00, 0x00f32c00, 0x0ff32c05, 0xfffffc00,
/* 0x1C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Burst RAM array entry -> unused */
/* 0x20 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x24 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x28 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x2C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Refresh Timer RAM array entry -> unused */
/* 0x30 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x34 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x38 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Exception RAM array entry -> unsused */
/* 0x3C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
};
/* UPM pattern for bus clock = 33.3 MHz */
static const u32 upm_patt_33[] = {
/* Offset */ /* UPM Read Single RAM array entry -> NAND Read Data */
/* 0x00 */ 0x0ff32000, 0x0fa32100, 0x3fb32005, 0xfffffc00,
/* 0x04 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write CMD */
/* 0x08 */ 0x00ff2c30, 0x00ff2c30, 0x0fff2c35, 0xfffffc00,
/* 0x0C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write ADDR */
/* 0x10 */ 0x00f3ec30, 0x00f3ec30, 0x0ff3ec35, 0xfffffc00,
/* 0x14 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Single RAM array entry -> NAND Write Data */
/* 0x18 */ 0x00f32c00, 0x00f32c00, 0x0ff32c05, 0xfffffc00,
/* 0x1C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Burst RAM array entry -> unused */
/* 0x20 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x24 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x28 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x2C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Refresh Timer RAM array entry -> unused */
/* 0x30 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x34 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x38 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Exception RAM array entry -> unsused */
/* 0x3C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
};
/* UPM pattern for bus clock = 41.7 MHz */
static const u32 upm_patt_42[] = {
/* Offset */ /* UPM Read Single RAM array entry -> NAND Read Data */
/* 0x00 */ 0x0ff32000, 0x0fa32100, 0x3fb32005, 0xfffffc00,
/* 0x04 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write CMD */
/* 0x08 */ 0x00ff2c30, 0x00ff2c30, 0x0fff2c35, 0xfffffc00,
/* 0x0C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write ADDR */
/* 0x10 */ 0x00f3ec30, 0x00f3ec30, 0x0ff3ec35, 0xfffffc00,
/* 0x14 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Single RAM array entry -> NAND Write Data */
/* 0x18 */ 0x00f32c00, 0x00f32c00, 0x0ff32c05, 0xfffffc00,
/* 0x1C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Burst RAM array entry -> unused */
/* 0x20 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x24 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x28 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x2C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Refresh Timer RAM array entry -> unused */
/* 0x30 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x34 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x38 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Exception RAM array entry -> unsused */
/* 0x3C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
};
/* UPM pattern for bus clock = 50 MHz */
static const u32 upm_patt_50[] = {
/* Offset */ /* UPM Read Single RAM array entry -> NAND Read Data */
/* 0x00 */ 0x0ff33000, 0x0fa33100, 0x0fa33005, 0xfffffc00,
/* 0x04 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write CMD */
/* 0x08 */ 0x00ff3d30, 0x00ff3c30, 0x0fff3c35, 0xfffffc00,
/* 0x0C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write ADDR */
/* 0x10 */ 0x00f3fd30, 0x00f3fc30, 0x0ff3fc35, 0xfffffc00,
/* 0x14 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Single RAM array entry -> NAND Write Data */
/* 0x18 */ 0x00f33d00, 0x00f33c00, 0x0ff33c05, 0xfffffc00,
/* 0x1C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Burst RAM array entry -> unused */
/* 0x20 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x24 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x28 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x2C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Refresh Timer RAM array entry -> unused */
/* 0x30 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x34 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x38 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Exception RAM array entry -> unsused */
/* 0x3C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
};
/* UPM pattern for bus clock = 66.7 MHz */
static const u32 upm_patt_67[] = {
/* Offset */ /* UPM Read Single RAM array entry -> NAND Read Data */
/* 0x00 */ 0x0ff33000, 0x0fe33000, 0x0fa33100, 0x0fa33000,
/* 0x04 */ 0x0fa33005, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write CMD */
/* 0x08 */ 0x00ff3d30, 0x00ff3c30, 0x0fff3c30, 0x0fff3c35,
/* 0x0C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write ADDR */
/* 0x10 */ 0x00f3fd30, 0x00f3fc30, 0x0ff3fc30, 0x0ff3fc35,
/* 0x14 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Single RAM array entry -> NAND Write Data */
/* 0x18 */ 0x00f33d00, 0x00f33c00, 0x0ff33c00, 0x0ff33c05,
/* 0x1C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Burst RAM array entry -> unused */
/* 0x20 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x24 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x28 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x2C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Refresh Timer RAM array entry -> unused */
/* 0x30 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x34 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x38 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Exception RAM array entry -> unsused */
/* 0x3C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
};
/* UPM pattern for bus clock = 83.3 MHz */
static const u32 upm_patt_83[] = {
/* Offset */ /* UPM Read Single RAM array entry -> NAND Read Data */
/* 0x00 */ 0x0ff33000, 0x0fe33000, 0x0fa33100, 0x0fa33000,
/* 0x04 */ 0x0fa33005, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write CMD */
/* 0x08 */ 0x00ff3e30, 0x00ff3c30, 0x0fff3c30, 0x0fff3c35,
/* 0x0C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write ADDR */
/* 0x10 */ 0x00f3fe30, 0x00f3fc30, 0x0ff3fc30, 0x0ff3fc35,
/* 0x14 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Single RAM array entry -> NAND Write Data */
/* 0x18 */ 0x00f33e00, 0x00f33c00, 0x0ff33c00, 0x0ff33c05,
/* 0x1C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Burst RAM array entry -> unused */
/* 0x20 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x24 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x28 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x2C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Refresh Timer RAM array entry -> unused */
/* 0x30 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x34 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x38 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Exception RAM array entry -> unsused */
/* 0x3C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
};
/* UPM pattern for bus clock = 100 MHz */
static const u32 upm_patt_100[] = {
/* Offset */ /* UPM Read Single RAM array entry -> NAND Read Data */
/* 0x00 */ 0x0ff33100, 0x0fe33000, 0x0fa33200, 0x0fa33000,
/* 0x04 */ 0x0fa33005, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write CMD */
/* 0x08 */ 0x00ff3f30, 0x00ff3c30, 0x0fff3c30, 0x0fff3c35,
/* 0x0C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write ADDR */
/* 0x10 */ 0x00f3ff30, 0x00f3fc30, 0x0ff3fc30, 0x0ff3fc35,
/* 0x14 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Single RAM array entry -> NAND Write Data */
/* 0x18 */ 0x00f33f00, 0x00f33c00, 0x0ff33c00, 0x0ff33c05,
/* 0x1C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Burst RAM array entry -> unused */
/* 0x20 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x24 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x28 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x2C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Refresh Timer RAM array entry -> unused */
/* 0x30 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x34 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x38 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Exception RAM array entry -> unsused */
/* 0x3C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
};
/* UPM pattern for bus clock = 133.3 MHz */
static const u32 upm_patt_133[] = {
/* Offset */ /* UPM Read Single RAM array entry -> NAND Read Data */
/* 0x00 */ 0x0ff33100, 0x0fe33000, 0x0fa33300, 0x0fa33000,
/* 0x04 */ 0x0fa33000, 0x0fa33005, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write CMD */
/* 0x08 */ 0x00ff3f30, 0x00ff3d30, 0x0fff3d30, 0x0fff3c35,
/* 0x0C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write ADDR */
/* 0x10 */ 0x00f3ff30, 0x00f3fd30, 0x0ff3fd30, 0x0ff3fc35,
/* 0x14 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Single RAM array entry -> NAND Write Data */
/* 0x18 */ 0x00f33f00, 0x00f33d00, 0x0ff33d00, 0x0ff33c05,
/* 0x1C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Burst RAM array entry -> unused */
/* 0x20 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x24 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x28 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x2C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Refresh Timer RAM array entry -> unused */
/* 0x30 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x34 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x38 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Exception RAM array entry -> unsused */
/* 0x3C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
};
/* UPM pattern for bus clock = 166.7 MHz */
static const u32 upm_patt_167[] = {
/* Offset */ /* UPM Read Single RAM array entry -> NAND Read Data */
/* 0x00 */ 0x0ff33200, 0x0fe33000, 0x0fa33300, 0x0fa33300,
/* 0x04 */ 0x0fa33005, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write CMD */
/* 0x08 */ 0x00ff3f30, 0x00ff3f30, 0x0fff3e30, 0xffff3c35,
/* 0x0C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Read Burst RAM array entry -> NAND Write ADDR */
/* 0x10 */ 0x00f3ff30, 0x00f3ff30, 0x0ff3fe30, 0x0ff3fc35,
/* 0x14 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Single RAM array entry -> NAND Write Data */
/* 0x18 */ 0x00f33f00, 0x00f33f00, 0x0ff33e00, 0x0ff33c05,
/* 0x1C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* UPM Write Burst RAM array entry -> unused */
/* 0x20 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x24 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x28 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x2C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Refresh Timer RAM array entry -> unused */
/* 0x30 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x34 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc00,
/* 0x38 */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
/* UPM Exception RAM array entry -> unsused */
/* 0x3C */ 0xfffffc00, 0xfffffc00, 0xfffffc00, 0xfffffc01,
};
/* Supported UPM timings */
struct upm_freq upm_freq_table[] = {
/* nominal freq. | ptr to table | GPL4 dis. | EHTR | EAD */
{25000000, upm_patt_25, 1, 0, 0},
{33333333, upm_patt_33, 1, 0, 0},
{41666666, upm_patt_42, 1, 0, 0},
{50000000, upm_patt_50, 0, 0, 0},
{66666666, upm_patt_67, 0, 0, 0},
{83333333, upm_patt_83, 0, 0, 0},
{100000000, upm_patt_100, 0, 1, 1},
{133333333, upm_patt_133, 0, 1, 1},
{166666666, upm_patt_167, 0, 1, 1},
};
#define UPM_FREQS (sizeof(upm_freq_table) / sizeof(struct upm_freq))
volatile const u32 *nand_upm_patt;
/*
* write into UPMB ram
*/
static void upmb_write (u_char addr, ulong val)
{
volatile ccsr_lbc_t *lbc = (void *)(CONFIG_SYS_MPC85xx_LBC_ADDR);
out_be32 (&lbc->mdr, val);
clrsetbits_be32(&lbc->mbmr, MxMR_MAD_MSK,
MxMR_OP_WARR | (addr & MxMR_MAD_MSK));
/* dummy access to perform write */
out_8 ((void __iomem *)CONFIG_SYS_NAND_BASE, 0);
clrbits_be32(&lbc->mbmr, MxMR_OP_WARR);
}
/*
* Initialize UPM for NAND flash access.
*/
static void nand_upm_setup (volatile ccsr_lbc_t *lbc)
{
uint i, j;
uint or3 = CONFIG_SYS_OR3_PRELIM;
uint clock = get_lbc_clock ();
out_be32 (&lbc->br3, 0); /* disable bank and reset all bits */
out_be32 (&lbc->br3, CONFIG_SYS_BR3_PRELIM);
/*
* Search appropriate UPM table for bus clock.
* If the bus clock exceeds a tolerated value, take the UPM timing for
* the next higher supported frequency to ensure that access works
* (even the access may be slower then).
*/
for (i = 0; (i < UPM_FREQS) && (clock > upm_freq_table[i].freq); i++)
;
if (i >= UPM_FREQS)
/* no valid entry found */
/* take last entry with configuration for max. bus clock */
i--;
if (upm_freq_table[i].ehtr) {
/* EHTR must be set due to TQM8548 timing specification */
or3 |= OR_UPM_EHTR;
}
if (upm_freq_table[i].ead)
/* EAD must be set due to TQM8548 timing specification */
or3 |= OR_UPM_EAD;
out_be32 (&lbc->or3, or3);
/* Assign address of table */
nand_upm_patt = upm_freq_table[i].upm_patt;
for (j = 0; j < 64; j++) {
upmb_write (j, *nand_upm_patt);
nand_upm_patt++;
}
/* Put UPM back to normal operation mode */
if (upm_freq_table[i].gpl4_disable)
/* GPL4 must be disabled according to timing specification */
out_be32 (&lbc->mbmr, MxMR_OP_NORM | MxMR_GPL_x4DIS);
return;
}
static struct fsl_upm_nand fun = {
.width = 8,
.upm_cmd_offset = 0x08,
.upm_addr_offset = 0x10,
.upm_mar_chip_offset = CONFIG_SYS_NAND_CS_DIST,
.chip_offset = CONFIG_SYS_NAND_CS_DIST,
.chip_delay = NAND_BIG_DELAY_US,
.wait_flags = FSL_UPM_WAIT_RUN_PATTERN | FSL_UPM_WAIT_WRITE_BUFFER,
};
void board_nand_select_device (struct nand_chip *nand, int chip)
{
}
int board_nand_init (struct nand_chip *nand)
{
volatile ccsr_lbc_t *lbc = (void *)(CONFIG_SYS_MPC85xx_LBC_ADDR);
if (!nand_upm_patt)
nand_upm_setup (lbc);
fun.upm.io_addr = nand->IO_ADDR_R;
fun.upm.mxmr = (void __iomem *)&lbc->mbmr;
fun.upm.mdr = (void __iomem *)&lbc->mdr;
fun.upm.mar = (void __iomem *)&lbc->mar;
return fsl_upm_nand_init (nand, &fun);
}
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