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/*
* 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 <init.h>
#include <io.h>
#include <linux/mtd/nand.h>
#include <mach/imx-nand.h>
#include <mach/generic.h>
#include <mach/imx-regs.h>
static void __bare_init noinline imx_nandboot_wait_op_done(void *regs)
{
u32 r;
while (1) {
r = readw(regs + NFC_V1_V2_CONFIG2);
if (r & NFC_V1_V2_CONFIG2_INT)
break;
};
r &= ~NFC_V1_V2_CONFIG2_INT;
writew(r, regs + NFC_V1_V2_CONFIG2);
}
/*
* This function issues the specified command to the NAND device and
* waits for completion.
*
* @param cmd command for NAND Flash
*/
static void __bare_init imx_nandboot_send_cmd(void *regs, u16 cmd)
{
writew(cmd, regs + NFC_V1_V2_FLASH_CMD);
writew(NFC_CMD, regs + NFC_V1_V2_CONFIG2);
imx_nandboot_wait_op_done(regs);
}
/*
* This function sends an address (or partial address) to the
* NAND device. The address is used to select the source/destination for
* a NAND command.
*
* @param addr address to be written to NFC.
* @param islast True if this is the last address cycle for command
*/
static void __bare_init noinline imx_nandboot_send_addr(void *regs, u16 addr)
{
writew(addr, regs + NFC_V1_V2_FLASH_ADDR);
writew(NFC_ADDR, regs + NFC_V1_V2_CONFIG2);
/* Wait for operation to complete */
imx_nandboot_wait_op_done(regs);
}
static void __bare_init imx_nandboot_nfc_addr(void *regs, u32 offs, int pagesize_2k)
{
imx_nandboot_send_addr(regs, offs & 0xff);
if (pagesize_2k) {
imx_nandboot_send_addr(regs, offs & 0xff);
imx_nandboot_send_addr(regs, (offs >> 11) & 0xff);
imx_nandboot_send_addr(regs, (offs >> 19) & 0xff);
imx_nandboot_send_addr(regs, (offs >> 27) & 0xff);
imx_nandboot_send_cmd(regs, NAND_CMD_READSTART);
} else {
imx_nandboot_send_addr(regs, (offs >> 9) & 0xff);
imx_nandboot_send_addr(regs, (offs >> 17) & 0xff);
imx_nandboot_send_addr(regs, (offs >> 25) & 0xff);
}
}
static void __bare_init imx_nandboot_send_page(void *regs,
unsigned int ops, int pagesize_2k)
{
int bufs, i;
if (nfc_is_v1() && pagesize_2k)
bufs = 4;
else
bufs = 1;
for (i = 0; i < bufs; i++) {
/* NANDFC buffer 0 is used for page read/write */
writew(i, regs + NFC_V1_V2_BUF_ADDR);
writew(ops, regs + NFC_V1_V2_CONFIG2);
/* Wait for operation to complete */
imx_nandboot_wait_op_done(regs);
}
}
static void __bare_init __memcpy32(void *trg, const void *src, int size)
{
int i;
unsigned int *t = trg;
unsigned const int *s = src;
for (i = 0; i < (size >> 2); i++)
*t++ = *s++;
}
static int __maybe_unused is_pagesize_2k(void)
{
#ifdef CONFIG_ARCH_IMX21
if (readl(IMX_SYSTEM_CTL_BASE + 0x14) & (1 << 5))
return 1;
else
return 0;
#endif
#ifdef CONFIG_ARCH_IMX27
if (readl(IMX_SYSTEM_CTL_BASE + 0x14) & (1 << 5))
return 1;
else
return 0;
#endif
#ifdef CONFIG_ARCH_IMX31
if (readl(IMX_CCM_BASE + CCM_RCSR) & RCSR_NFMS)
return 1;
else
return 0;
#endif
#if defined(CONFIG_ARCH_IMX35) || defined(CONFIG_ARCH_IMX25)
if (readl(IMX_CCM_BASE + CCM_RCSR) & (1 << 8))
return 1;
else
return 0;
#endif
}
void __bare_init imx_nand_load_image(void *dest, int size)
{
u32 tmp, page, block, blocksize, pagesize;
int pagesize_2k = 1;
void *regs, *base, *spare0;
#if defined(CONFIG_NAND_IMX_BOOT_512)
pagesize_2k = 0;
#elif defined(CONFIG_NAND_IMX_BOOT_2K)
pagesize_2k = 1;
#else
pagesize_2k = is_pagesize_2k();
#endif
if (pagesize_2k) {
pagesize = 2048;
blocksize = 128 * 1024;
} else {
pagesize = 512;
blocksize = 16 * 1024;
}
base = (void __iomem *)IMX_NFC_BASE;
if (nfc_is_v21()) {
regs = base + 0x1e00;
spare0 = base + 0x1000;
} else if (nfc_is_v1()) {
regs = base + 0xe00;
spare0 = base + 0x800;
}
imx_nandboot_send_cmd(regs, NAND_CMD_RESET);
/* preset operation */
/* Unlock the internal RAM Buffer */
writew(0x2, regs + NFC_V1_V2_CONFIG);
/* Unlock Block Command for given address range */
writew(0x4, regs + NFC_V1_V2_WRPROT);
tmp = readw(regs + NFC_V1_V2_CONFIG1);
tmp |= NFC_V1_V2_CONFIG1_ECC_EN;
if (nfc_is_v21())
/* currently no support for 218 byte OOB with stronger ECC */
tmp |= NFC_V2_CONFIG1_ECC_MODE_4;
tmp &= ~(NFC_V1_V2_CONFIG1_SP_EN | NFC_V1_V2_CONFIG1_INT_MSK);
writew(tmp, regs + NFC_V1_V2_CONFIG1);
if (nfc_is_v21()) {
if (pagesize_2k)
writew(NFC_V2_SPAS_SPARESIZE(64), regs + NFC_V2_SPAS);
else
writew(NFC_V2_SPAS_SPARESIZE(16), regs + NFC_V2_SPAS);
}
block = page = 0;
while (1) {
page = 0;
while (page * pagesize < blocksize) {
debug("page: %d block: %d dest: %p src "
"0x%08x\n",
page, block, dest,
block * blocksize +
page * pagesize);
imx_nandboot_send_cmd(regs, NAND_CMD_READ0);
imx_nandboot_nfc_addr(regs, block * blocksize +
page * pagesize, pagesize_2k);
imx_nandboot_send_page(regs, NFC_OUTPUT, pagesize_2k);
page++;
if (pagesize_2k) {
if ((readw(spare0) & 0xff) != 0xff)
continue;
} else {
if ((readw(spare0 + 4) & 0xff00) != 0xff00)
continue;
}
__memcpy32(dest, base, pagesize);
dest += pagesize;
size -= pagesize;
if (size <= 0)
return;
}
block++;
}
}
#define CONFIG_NAND_IMX_BOOT_DEBUG
#ifdef CONFIG_NAND_IMX_BOOT_DEBUG
#include <command.h>
static int do_nand_boot_test(struct command *cmdtp, int argc, char *argv[])
{
void *dest;
int size;
if (argc < 3)
return COMMAND_ERROR_USAGE;
dest = (void *)strtoul_suffix(argv[1], NULL, 0);
size = strtoul_suffix(argv[2], NULL, 0);
imx_nand_load_image(dest, size);
return 0;
}
static const __maybe_unused char cmd_nand_boot_test_help[] =
"Usage: nand_boot_test <dest> <size>\n"
"This command loads the booloader from the NAND memory like the reset\n"
"routine does. Its intended for development tests only";
BAREBOX_CMD_START(nand_boot_test)
.cmd = do_nand_boot_test,
.usage = "load bootloader from NAND",
BAREBOX_CMD_HELP(cmd_nand_boot_test_help)
BAREBOX_CMD_END
#endif
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