From 819e36b8ceadb1d67db1ffe91b99c5282bfc6159 Mon Sep 17 00:00:00 2001 From: "H. Nikolaus Schaller" Date: Fri, 20 Apr 2012 14:10:36 +0200 Subject: tree moved to a better location --- drivers/onenand.c | 238 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 238 insertions(+) create mode 100644 drivers/onenand.c (limited to 'drivers/onenand.c') diff --git a/drivers/onenand.c b/drivers/onenand.c new file mode 100644 index 0000000..9902a0d --- /dev/null +++ b/drivers/onenand.c @@ -0,0 +1,238 @@ +/* + * (C) Copyright 2005 Samsung Electronis + * Kyungmin Park + * + * 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 + +#include + +#include "onenand_regs.h" + +#define onenand_readw(a) (*(volatile unsigned short *)(a)) +#define onenand_writew(v, a) ((*(volatile unsigned short *)(a)) = (u16) (v)) + +#define SAMSUNG_MFR_ID 0xEC +#define KFM1G16Q2A_DEV_ID 0x30 +#define KFN2G16Q2A_DEV_ID 0x40 + + +#define THIS_ONENAND(a) (ONENAND_ADDR + (a)) + +#define READ_INTERRUPT() \ + onenand_readw(THIS_ONENAND(ONENAND_REG_INTERRUPT)) + +#define READ_CTRL_STATUS() \ + onenand_readw(THIS_ONENAND(ONENAND_REG_CTRL_STATUS)) + +#define READ_ECC_STATUS() \ + onenand_readw(THIS_ONENAND(ONENAND_REG_ECC_STATUS)) + +#define SET_EMIFS_CS_CONFIG(v) \ + (*(volatile unsigned long *)(OMAP_EMIFS_CS_CONFIG) = (v)) + +#define onenand_block_address(block) (block) +#define onenand_sector_address(page) (page << 2) +#define onenand_buffer_address() ((1 << 3) << 8) +#define onenand_bufferram_address(block) (0) + +#if defined(CFG_SYNC_BURST_READ) && defined(CONFIG_OMAP1610) +static inline void set_sync_burst_read(void) +{ + unsigned int value; + value = 0 + | (0x1 << 15) /* Read Mode: Synchronous */ + | (0x4 << 12) /* Burst Read Latency: 4 cycles */ + | (0x4 << 9) /* Burst Length: 8 word */ + | (0x1 << 7) /* RDY signal plarity */ + | (0x1 << 6) /* INT signal plarity */ + | (0x1 << 5) /* I/O buffer enable */ + ; + onenand_writew(value, THIS_ONENAND(ONENAND_REG_SYS_CFG1)); + + value = 0 + | (4 << 16) /* Synchronous Burst Read */ + | (1 << 12) /* PGWST/WELEN */ + | (1 << 8) /* WRWST */ + | (4 << 4) /* RDWST */ + | (1 << 0) /* FCLKDIV => 48MHz */ + ; + SET_EMIFS_CS_CONFIG(value); +} + +static inline void set_async_read(void) +{ + unsigned int value; + value = 0 + | (0x0 << 15) /* Read Mode: Asynchronous */ + | (0x4 << 12) /* Burst Read Latency: 4 cycles */ + | (0x0 << 9) /* Burst Length: continuous */ + | (0x1 << 7) /* RDY signal plarity */ + | (0x1 << 6) /* INT signal plarity */ + | (0x0 << 5) /* I/O buffer disable */ + ; + onenand_writew(value, THIS_ONENAND(ONENAND_REG_SYS_CFG1)); + + value = 0 + | (0 << 16) /* Asynchronous Read */ + | (1 << 12) /* PGWST/WELEN */ + | (1 << 8) /* WRWST */ + | (3 << 4) /* RDWST */ + | (1 << 0) /* FCLKDIV => 48MHz */ + ; + SET_EMIFS_CS_CONFIG(value); +} +#else +#define set_sync_burst_read(...) do { } while (0) +#define set_async_read(...) do { } while (0) +#endif + +int +onenand_chip() +{ + unsigned short mf_id, dev_id; + mf_id = (*(volatile unsigned short *)(THIS_ONENAND(ONENAND_REG_MANUFACTURER_ID))); + dev_id = (*(volatile unsigned short *)(THIS_ONENAND(ONENAND_REG_DEVICE_ID))); + + if(mf_id == SAMSUNG_MFR_ID) { + if (dev_id == KFM1G16Q2A_DEV_ID) { + printf("Detected Samsung MuxOneNAND1G Flash \r\n"); + return 0; + } else if (dev_id == KFN2G16Q2A_DEV_ID) { + printf("Detected Samsung MuxOneNAND2G Flash \r\n"); + return 0; + } else { + printf(" ONENAND Flash unsupported\r\n"); + return 1; + } + } else { + printf("ONENAND Flash Unsupported\r\n"); + return 1; + } +} + +/* read a page with ECC */ +static inline int onenand_read_page(ulong block, ulong page, u_char *buf) +{ + unsigned long *base; + +#ifndef __HAVE_ARCH_MEMCPY32 + unsigned int offset, value; + unsigned long *p; + unsigned int ctrl, ecc; + unsigned short bbmarker; +#endif + + onenand_writew(onenand_block_address(block), + THIS_ONENAND(ONENAND_REG_START_ADDRESS1)); + + onenand_writew(onenand_sector_address(page), + THIS_ONENAND(ONENAND_REG_START_ADDRESS8)); + + onenand_writew(onenand_buffer_address(), + THIS_ONENAND(ONENAND_REG_START_BUFFER)); + + onenand_writew(onenand_bufferram_address(block), + THIS_ONENAND(ONENAND_REG_START_ADDRESS2)); + + onenand_writew(ONENAND_INT_CLEAR, THIS_ONENAND(ONENAND_REG_INTERRUPT)); + + onenand_writew(ONENAND_CMD_READ, THIS_ONENAND(ONENAND_REG_COMMAND)); + +#ifndef __HAVE_ARCH_MEMCPY32 + p = (unsigned long *) buf; +#endif + base = (unsigned long *) (ONENAND_ADDR + ONENAND_DATARAM); + + while (!(READ_INTERRUPT() & ONENAND_INT_MASTER)) + continue; + + ctrl = READ_CTRL_STATUS(); + + if (ctrl & ONENAND_CTRL_ERROR) { + hang(); + } + + if (READ_INTERRUPT() & ONENAND_INT_READ) { + + ecc = READ_ECC_STATUS(); + if (ecc & ONENAND_ECC_2BIT_ALL) { + hang(); + } + + /* Check if the block is bad. Bad block markers */ + /* are stored in spare area of 1st or 2nd page */ + if ((page == 0) || (page == 1)) + { + unsigned long *spareArea = (unsigned long *) (ONENAND_ADDR + ONENAND_SPARERAM); + bbmarker = *spareArea; + /* for bad block markers */ + if (bbmarker != 0xFFFF){ + return 1; + } + } + } + +#ifdef __HAVE_ARCH_MEMCPY32 + /* 32 bytes boundary memory copy */ + memcpy32(buf, base, ONENAND_PAGE_SIZE); +#else + for (offset = 0; offset < (ONENAND_PAGE_SIZE >> 2); offset++) { + value = *(base + offset); + *p++ = value; + } +#endif + + return 0; +} + +#define ONENAND_START_PAGE 0 +#define ONENAND_PAGES_PER_BLOCK 64 + +/** + * onenand_read_block - Read a block data to buf + * @return 0 on sucess + */ + +int onenand_read_block(unsigned char *buf, ulong block) +{ + int page, offset = 0; + + set_sync_burst_read(); + + /* NOTE: you must read page from page 1 of block 0 */ + /* read the block page by page*/ + for (page = ONENAND_START_PAGE; + page < ONENAND_PAGES_PER_BLOCK; page++) { + + if (onenand_read_page(block, page, buf + offset)){ + set_async_read(); + return 1; + } + + offset += ONENAND_PAGE_SIZE; + } + + set_async_read(); + + return 0; +} + -- cgit v1.1