diff options
Diffstat (limited to 'board/sheldon/simpc8313/sdram.c')
| -rw-r--r-- | board/sheldon/simpc8313/sdram.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/board/sheldon/simpc8313/sdram.c b/board/sheldon/simpc8313/sdram.c deleted file mode 100644 index 7c12fe8..0000000 --- a/board/sheldon/simpc8313/sdram.c +++ /dev/null @@ -1,177 +0,0 @@ -/* - * Copyright (C) Freescale Semiconductor, Inc. 2006-2007 - * Copyright (C) Sheldon Instruments, Inc. 2008 - * - * Author: Ron Madrid <info@sheldoninst.com> - * - * (C) Copyright 2006 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <mpc83xx.h> -#include <spd_sdram.h> -#include <asm/bitops.h> -#include <asm/io.h> -#include <asm/processor.h> -#include <asm/mmu.h> - -DECLARE_GLOBAL_DATA_PTR; - -static long fixed_sdram(void); - -#if defined(CONFIG_NAND_SPL) -void si_wait_i2c(void) -{ - volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; - - while (!(__raw_readb(&im->i2c[0].sr) & 0x02)) - ; - - __raw_writeb(0x00, &im->i2c[0].sr); - - sync(); - - return; -} - -void si_read_i2c(u32 lbyte, int count, u8 *buffer) -{ - volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; - u32 i; - u8 chip = 0x50 << 1; /* boot sequencer I2C */ - u32 ubyte = (lbyte & 0xff00) >> 8; - - lbyte &= 0xff; - - /* - * Set up controller - */ - __raw_writeb(0x3f, &im->i2c[0].fdr); - __raw_writeb(0x00, &im->i2c[0].adr); - __raw_writeb(0x00, &im->i2c[0].sr); - __raw_writeb(0x00, &im->i2c[0].dr); - - while (__raw_readb(&im->i2c[0].sr) & 0x20) - ; - - /* - * Writing address to device - */ - __raw_writeb(0xb0, &im->i2c[0].cr); - sync(); - __raw_writeb(chip, &im->i2c[0].dr); - si_wait_i2c(); - - __raw_writeb(0xb0, &im->i2c[0].cr); - sync(); - __raw_writeb(ubyte, &im->i2c[0].dr); - si_wait_i2c(); - - __raw_writeb(lbyte, &im->i2c[0].dr); - si_wait_i2c(); - - __raw_writeb(0xb4, &im->i2c[0].cr); - sync(); - __raw_writeb(chip + 1, &im->i2c[0].dr); - si_wait_i2c(); - - __raw_writeb(0xa0, &im->i2c[0].cr); - sync(); - - /* - * Dummy read - */ - __raw_readb(&im->i2c[0].dr); - - si_wait_i2c(); - - /* - * Read actual data - */ - for (i = 0; i < count; i++) - { - if (i == (count - 2)) /* Reached next to last byte, No ACK */ - __raw_writeb(0xa8, &im->i2c[0].cr); - if (i == (count - 1)) /* Reached last byte, STOP */ - __raw_writeb(0x88, &im->i2c[0].cr); - - /* Read byte of data */ - buffer[i] = __raw_readb(&im->i2c[0].dr); - - if (i == (count - 1)) - break; - si_wait_i2c(); - } - - return; -} -#endif /* CONFIG_NAND_SPL */ - -phys_size_t initdram(int board_type) -{ - volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; - volatile fsl_lbc_t *lbc = &im->im_lbc; - u32 msize; - - if ((__raw_readl(&im->sysconf.immrbar) & IMMRBAR_BASE_ADDR) != (u32) im) - return -1; - - /* DDR SDRAM - Main SODIMM */ - __raw_writel(CONFIG_SYS_DDR_BASE & LAWBAR_BAR, &im->sysconf.ddrlaw[0].bar); - - msize = fixed_sdram(); - - /* Local Bus setup lbcr and mrtpr */ - __raw_writel(CONFIG_SYS_LBC_LBCR, &lbc->lbcr); - __raw_writel(CONFIG_SYS_LBC_MRTPR, &lbc->mrtpr); - sync(); - - /* return total bus SDRAM size(bytes) -- DDR */ - return (msize * 1024 * 1024); -} - -/************************************************************************* - * fixed sdram init -- reads values from boot sequencer I2C - ************************************************************************/ -static long fixed_sdram(void) -{ - volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; - u32 msizelog2, msize = 1; -#if defined(CONFIG_NAND_SPL) - u32 i; - const u8 bytecount = 135; - u8 buffer[bytecount]; - u32 addr, data; - - si_read_i2c(0, bytecount, buffer); - - for (i = 18; i < bytecount; i += 7){ - addr = (u32)buffer[i]; - addr <<= 8; - addr |= (u32)buffer[i + 1]; - addr <<= 2; - data = (u32)buffer[i + 2]; - data <<= 8; - data |= (u32)buffer[i + 3]; - data <<= 8; - data |= (u32)buffer[i + 4]; - data <<= 8; - data |= (u32)buffer[i + 5]; - - __raw_writel(data, (u32 *)(CONFIG_SYS_IMMR + addr)); - } - - sync(); - - /* enable DDR controller */ - __raw_writel((__raw_readl(&im->ddr.sdram_cfg) | SDRAM_CFG_MEM_EN), &im->ddr.sdram_cfg); -#endif /* (CONFIG_NAND_SPL) */ - - msizelog2 = ((__raw_readl(&im->sysconf.ddrlaw[0].ar) & LAWAR_SIZE) + 1); - msize <<= (msizelog2 - 20); - - return msize; -} |