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xburst-tools/xbboot/target-stage1/board-jz4760.c

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/*
* board.c
*
* Board init routines.
*
* Copyright (C) 2006 Ingenic Semiconductor Inc.
*
*/
#include "common.h"
#include "jz4760.h"
#include "board-jz4760.h"
void nand_init_4760()
{
REG_NEMC_NFCSR |= NEMC_NFCSR_NFE1 | NEMC_NFCSR_NFCE1;
}
void cpm_start_all_4760()
{
__cpm_start_all();
}
/*
* SD0 ~ SD7, SA0 ~ SA5, CS2#, RD#, WR#, WAIT#
*/
#define __gpio_as_nor() \
do { \
/* SD0 ~ SD7, RD#, WR#, CS2#, WAIT# */ \
REG_GPIO_PXFUNS(0) = 0x084300ff; \
REG_GPIO_PXTRGC(0) = 0x084300ff; \
REG_GPIO_PXSELC(0) = 0x084300ff; \
REG_GPIO_PXPES(0) = 0x084300ff; \
/* SA0 ~ SA5 */ \
REG_GPIO_PXFUNS(1) = 0x0000003f; \
REG_GPIO_PXTRGC(1) = 0x0000003f; \
REG_GPIO_PXSELC(1) = 0x0000003f; \
REG_GPIO_PXPES(1) = 0x0000003f; \
} while (0)
void gpio_init_4760()
{
__gpio_as_uart0();
__gpio_as_uart1();
__gpio_as_uart2();
__gpio_as_uart3();
#ifdef CONFIG_FPGA // if the delay isn't added on FPGA, the first line that uart to print will not be normal.
__gpio_as_nor();
{
volatile int i=1000;
while(i--);
}
#endif
__gpio_as_nand_16bit(1);
}
#define MHZ (1000 * 1000)
static inline unsigned int pll_calc_m_n_od(unsigned int speed, unsigned int xtal)
{
const int pll_m_max = 0x7f, pll_m_min = 4;
const int pll_n_max = 0x0f, pll_n_min = 2;
int od[] = {1, 2, 4, 8};
int min_od = 0;
unsigned int plcr_m_n_od = 0;
unsigned int distance;
unsigned int tmp, raw;
int i, j, k;
int m, n;
distance = 0xFFFFFFFF;
for (i = 0; i < sizeof (od) / sizeof(int); i++) {
/* Limit: 500MHZ <= CLK_OUT * OD <= 1500MHZ */
// if (min_od != 0)
// break;
if ((speed * od[i]) < 500 * MHZ || (speed * od[i]) > 1500 * MHZ)
continue;
for (k = pll_n_min; k <= pll_n_max; k++) {
n = k;
/* Limit: 1MHZ <= XIN/N <= 50MHZ */
if ((xtal / n) < (1 * MHZ))
break;
if ((xtal / n) > (15 * MHZ))
continue;
for (j = pll_m_min; j <= pll_m_max; j++) {
m = j*2;
raw = xtal * m / n;
tmp = raw / od[i];
tmp = (tmp > speed) ? (tmp - speed) : (speed - tmp);
if (tmp < distance) {
distance = tmp;
plcr_m_n_od = (j << CPM_CPPCR_PLLM_BIT)
| (k << CPM_CPPCR_PLLN_BIT)
| (i << CPM_CPPCR_PLLOD_BIT);
if (!distance) { /* Match. */
// serial_puts("right value");
return plcr_m_n_od;
}
}
}
min_od = od[i];
}
}
return plcr_m_n_od;
}
/* TODO: pll_init() need modification. */
void pll_init_4760()
{
register unsigned int cfcr, plcr1;
int n2FR[9] = {
0, 0, 1, 2, 3, 0, 4, 0, 5
};
/** divisors,
* for jz4760 ,I:H:H2:P:M:S.
* DIV should be one of [1, 2, 3, 4, 6, 8] like:
* div[6] = {1, 2, 2, 2, 2, 2};
* div[6] = {1, 3, 6, 6, 6, 6};
*/
int div[6] = {1, 2, 4, 4, 4, 4};
cfcr = CPM_CPCCR_PCS |
(n2FR[div[0]] << CPM_CPCCR_CDIV_BIT) |
(n2FR[div[1]] << CPM_CPCCR_HDIV_BIT) |
(n2FR[div[2]] << CPM_CPCCR_H2DIV_BIT) |
(n2FR[div[3]] << CPM_CPCCR_PDIV_BIT) |
(n2FR[div[4]] << CPM_CPCCR_MDIV_BIT) |
(n2FR[div[5]] << CPM_CPCCR_SDIV_BIT);
if (CFG_EXTAL > 16000000)
cfcr |= CPM_CPCCR_ECS;
else
cfcr &= ~CPM_CPCCR_ECS;
/* set CPM_CPCCR_MEM only for ddr1 or ddr2 */
#if defined(CONFIG_DDRC) && (defined(CONFIG_SDRAM_DDR1) || defined(CONFIG_SDRAM_DDR2))
cfcr |= CPM_CPCCR_MEM;
#else
cfcr &= ~CPM_CPCCR_MEM;
#endif
cfcr |= CPM_CPCCR_CE;
plcr1 = pll_calc_m_n_od(CFG_CPU_SPEED, CFG_EXTAL);
plcr1 |= (0x20 << CPM_CPPCR_PLLST_BIT) /* PLL stable time */
| CPM_CPPCR_PLLEN; /* enable PLL */
/* init PLL */
REG_CPM_CPCCR = cfcr;
REG_CPM_CPPCR = plcr1;
while(!(REG_CPM_CPPSR & (1 << 29)));
#ifdef DEBUG
serial_puts("REG_CPM_CPCCR = ");
serial_put_hex(REG_CPM_CPCCR);
serial_puts("REG_CPM_CPPCR = ");
serial_put_hex(REG_CPM_CPPCR);
#endif
}
#if (defined(CONFIG_SDRAM_MDDR)||defined(CONFIG_SDRAM_DDR1)||defined(CONFIG_SDRAM_DDR2))
void jzmemset(void *dest,int ch,int len)
{
unsigned int *d = (unsigned int *)dest;
int i;
int wd;
wd = (ch << 24) | (ch << 16) | (ch << 8) | ch;
for(i = 0;i < len / 32;i++)
{
*d++ = wd;
*d++ = wd;
*d++ = wd;
*d++ = wd;
*d++ = wd;
*d++ = wd;
*d++ = wd;
*d++ = wd;
}
}
unsigned int gen_verify_data(unsigned int i)
{
i = i/4*0x11111111;
return i;
//return 0xffffffff;
}
int initdram(int board_type)
{
u32 ddr_cfg;
u32 rows, cols, dw, banks;
unsigned long size;
ddr_cfg = REG_DDRC_CFG;
rows = 12 + ((ddr_cfg & DDRC_CFG_ROW_MASK) >> DDRC_CFG_ROW_BIT);
cols = 8 + ((ddr_cfg & DDRC_CFG_COL_MASK) >> DDRC_CFG_COL_BIT);
dw = (ddr_cfg & DDRC_CFG_DW) ? 4 : 2;
banks = (ddr_cfg & DDRC_CFG_BA) ? 8 : 4;
size = (1 << (rows + cols)) * dw * banks;
size *= (DDR_CS1EN + DDR_CS0EN);
return size;
}
static int dma_check_result(void *src, void *dst, int size,int print_flag)
{
unsigned int addr1, addr2, i, err = 0;
unsigned int data_expect,dsrc,ddst;
addr1 = (unsigned int)src;
addr2 = (unsigned int)dst;
for (i = 0; i < size; i += 4) {
data_expect = gen_verify_data(i);
dsrc = REG32(addr1);
ddst = REG32(addr2);
if ((dsrc != data_expect) || (ddst != data_expect)) {
#if DEBUG
serial_put_hex(addr2);
serial_puts("data:");
serial_put_hex(data_expect);
serial_puts("src");
serial_put_hex(dsrc);
serial_puts("dst");
serial_put_hex(ddst);
#endif
err = 1;
if(!print_flag)
return 1;
}
addr1 += 4;
addr2 += 4;
}
return err;
}
#if DEBUG
void dump_jz_dma_channel(unsigned int dmanr)
{
if (dmanr > MAX_DMA_NUM)
return;
serial_puts("REG_DDRC_ST \t\t=");
serial_put_hex(REG_DDRC_ST);
serial_puts("DMA Registers, Channel ");
serial_put_hex(dmanr);
serial_puts(" DMACR = ");
serial_put_hex(REG_DMAC_DMACR(dmanr/HALF_DMA_NUM));
serial_puts(" DSAR = ");
serial_put_hex(REG_DMAC_DSAR(dmanr));
serial_puts(" DTAR = ");
serial_put_hex(REG_DMAC_DTAR(dmanr));
serial_puts(" DTCR = ");
serial_put_hex(REG_DMAC_DTCR(dmanr));
serial_puts(" DRSR = ");
serial_put_hex(REG_DMAC_DRSR(dmanr));
serial_puts(" DCCSR = ");
serial_put_hex(REG_DMAC_DCCSR(dmanr));
serial_puts(" DCMD = ");
serial_put_hex(REG_DMAC_DCMD(dmanr));
serial_puts(" DDA = ");
serial_put_hex(REG_DMAC_DDA(dmanr));
serial_puts(" DMADBR = ");
serial_put_hex(REG_DMAC_DMADBR(dmanr/HALF_DMA_NUM));
}
void dma_nodesc_test_single(int dma_chan, int dma_src_addr, int dma_dst_addr, int size)
{
int dma_src_phys_addr, dma_dst_phys_addr;
/* Allocate DMA buffers */
dma_src_phys_addr = dma_src_addr & (~0xa0000000);
dma_dst_phys_addr = dma_dst_addr & (~0xa0000000);
/* Init DMA module */
REG_DMAC_DCCSR(dma_chan) = 0;
REG_DMAC_DRSR(dma_chan) = DMAC_DRSR_RS_AUTO;
REG_DMAC_DSAR(dma_chan) = dma_src_phys_addr;
REG_DMAC_DTAR(dma_chan) = dma_dst_phys_addr;
REG_DMAC_DTCR(dma_chan) = size;
REG_DMAC_DCMD(dma_chan) = DMAC_DCMD_SAI | DMAC_DCMD_DAI | DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32 | DMAC_DCMD_DS_32BIT;
REG_DMAC_DCCSR(dma_chan) = DMAC_DCCSR_NDES | DMAC_DCCSR_EN;
}
static void ddrc_regs_print(void)
{
serial_puts("\nDDRC REGS:\n");
serial_puts("REG_DDRC_ST \t\t=");
serial_put_hex(REG_DDRC_ST);
serial_puts("REG_DDRC_CFG \t\t=");
serial_put_hex( REG_DDRC_CFG);
serial_puts("REG_DDRC_CTRL \t\t=");
serial_put_hex(REG_DDRC_CTRL);
serial_puts("REG_DDRC_LMR \t\t=");
serial_put_hex(REG_DDRC_LMR);
serial_puts("REG_DDRC_TIMING1 \t=");
serial_put_hex(REG_DDRC_TIMING1);
serial_puts("REG_DDRC_TIMING2 \t=");
serial_put_hex(REG_DDRC_TIMING2);
serial_puts("REG_DDRC_REFCNT \t\t=");
serial_put_hex(REG_DDRC_REFCNT);
serial_puts("REG_DDRC_DQS \t\t=");
serial_put_hex(REG_DDRC_DQS);
serial_puts("REG_DDRC_DQS_ADJ \t=");
serial_put_hex(REG_DDRC_DQS_ADJ);
serial_puts("REG_DDRC_MMAP0 \t\t=");
serial_put_hex(REG_DDRC_MMAP0);
serial_puts("REG_DDRC_MMAP1 \t\t=");
serial_put_hex(REG_DDRC_MMAP1);
serial_puts("REG_DDRC_MDELAY \t\t=");
serial_put_hex(REG_DDRC_MDELAY);
serial_puts("REG_EMC_PMEMPS2 \t\t=");
serial_put_hex(REG_EMC_PMEMPS2);
}
static int dma_memcpy_test(int channle_0, int channle_1) {
int i, err = 0, banks;
unsigned int addr, DDR_DMA0_SRC, DDR_DMA0_DST, DDR_DMA1_SRC, DDR_DMA1_DST;
volatile unsigned int tmp;
register unsigned int cpu_clk;
long int memsize, banksize, testsize;
int channel;
#ifndef CONFIG_DDRC
banks = (SDRAM_BANK4 ? 4 : 2) *(CONFIG_NR_DRAM_BANKS);
#else
banks = (DDR_BANK8 ? 8 : 4) *(DDR_CS0EN + DDR_CS1EN);
#endif
memsize = initdram(0);
banksize = memsize/banks;
testsize = 4096;
DDR_DMA0_SRC = DDR_DMA_BASE + banksize*0;
DDR_DMA0_DST = DDR_DMA_BASE + banksize*0 + testsize;
DDR_DMA1_SRC = DDR_DMA_BASE + banksize*(banks - 1) + testsize*2;
DDR_DMA1_DST = DDR_DMA_BASE + banksize*(banks - 1) + testsize*3;
cpu_clk = CFG_CPU_SPEED;
// for(channel = 0; channel < MAX_DMA_NUM; channel++) {
// MDMA
REG_MDMAC_DMACR = DMAC_DMACR_DMAE;
// COMMON DMA
//REG_DMAC_DMACR(0) = DMAC_DMACR_DMAE; /* global DMA enable bit */
//REG_DMAC_DMACR(1) = DMAC_DMACR_DMAE; /* global DMA enable bit */
// Write A0
addr = DDR_DMA0_SRC;
for (i = 0; i < testsize; i += 4) {
*(volatile unsigned int *)addr = (i/4*0x11111111);
//*(volatile unsigned int *)addr = addr;
addr += 4;
}
// Write A2
addr = DDR_DMA1_SRC;
for (i = 0; i < testsize; i += 4) {
*(volatile unsigned int *)addr = (i/4*0x11111111);
//*(volatile unsigned int *)addr = addr;
addr += 4;
}
// MDMA
REG_MDMAC_DMACR = 0;
// COMMON DMA
//REG_DMAC_DMACR(0) = 0;
//REG_DMAC_DMACR(1) = 0;
/* Init target buffer */
jzmemset((void *)DDR_DMA0_DST, 0, testsize);
jzmemset((void *)DDR_DMA1_DST, 0, testsize);
// Set DMA1 for moving data from A0 -> A1
dma_data_move(channle_0, DDR_DMA0_SRC, DDR_DMA0_DST, testsize, DMAC_DCMD_DS_32BYTE);
// Set DMA2 for moving data from A2 -> A3
dma_data_move(channle_1, DDR_DMA1_SRC, DDR_DMA1_DST, testsize, DMAC_DCMD_DS_64BYTE);
// Start DMA0
REG_DMAC_DCCSR(0) = DMAC_DCCSR_NDES | DMAC_DCCSR_EN;
// Wait for DMA0 finishing
while(REG_DMAC_DTCR(0));
// Start DMA1
REG_DMAC_DCCSR(1) = DMAC_DCCSR_NDES | DMAC_DCCSR_EN;
// Read from A1 & check
err = check_result((void *)DDR_DMA0_SRC, (void *)DDR_DMA0_DST, testsize);
REG_DMAC_DCCSR(0) &= ~DMAC_DCCSR_EN; /* disable DMA */
if (err != 0) {
serial_puts("DMA0: err!\n");
//return err;
}
// Wait for DMA1 finishing
while(REG_DMAC_DTCR(1));
// Read from A3 & check
err = check_result((void *)DDR_DMA1_SRC, (void *)DDR_DMA1_DST, testsize);
REG_DMAC_DCCSR(1) &= ~DMAC_DCCSR_EN; /* disable DMA */
if (err != 0) {
serial_puts("DMA1: err!\n");
//return err;
}
serial_puts("TEST PASSED\n\n");
tmp = (cpu_clk / 1000000) * 1;
while (tmp--);
// }
return err;
}
#endif
void dma_nodesc_test(int dma_chan, int dma_src_addr, int dma_dst_addr, int size)
{
int dma_src_phys_addr, dma_dst_phys_addr;
/* Allocate DMA buffers */
dma_src_phys_addr = dma_src_addr & (~0xa0000000);
dma_dst_phys_addr = dma_dst_addr & (~0xa0000000);
/* Init DMA module */
REG_DMAC_DCCSR(dma_chan) = 0;
REG_DMAC_DRSR(dma_chan) = DMAC_DRSR_RS_AUTO;
REG_DMAC_DSAR(dma_chan) = dma_src_phys_addr;
REG_DMAC_DTAR(dma_chan) = dma_dst_phys_addr;
REG_DMAC_DTCR(dma_chan) = size / 32;
REG_DMAC_DCMD(dma_chan) = DMAC_DCMD_SAI | DMAC_DCMD_DAI | DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32 | DMAC_DCMD_DS_32BYTE;
REG_DMAC_DCCSR(dma_chan) = DMAC_DCCSR_NDES | DMAC_DCCSR_EN;
}
#define DDR_DMA_BASE (0xa0000000) /*un-cached*/
#define DMA_CHANNEL0_EN
//#define DMA_CHANNEL1_EN
static int ddr_dma_test(int print_flag) {
int i, err = 0, banks;
int times;
unsigned int addr, DDR_DMA0_SRC, DDR_DMA0_DST, DDR_DMA1_SRC, DDR_DMA1_DST;
volatile unsigned int tmp;
register unsigned int cpu_clk;
long int memsize, banksize, testsize;
REG_DMAC_DMADCKE(0) = 0x3f;
REG_DMAC_DMADCKE(1) = 0x3f;
#ifndef CONFIG_DDRC
banks = (SDRAM_BANK4 ? 4 : 2) *(CONFIG_NR_DRAM_BANKS);
#else
banks = (DDR_BANK8 ? 8 : 4) *(DDR_CS0EN + DDR_CS1EN);
#endif
memsize = initdram(0);
banksize = memsize/banks;
testsize = 4096;
for(times = 0; times < banks; times++) {
#if 0
DDR_DMA0_SRC = DDR_DMA_BASE + banksize*0;
DDR_DMA0_DST = DDR_DMA_BASE + banksize*(banks - 2) + testsize;
DDR_DMA1_SRC = DDR_DMA_BASE + banksize*(banks - 1) + testsize;
DDR_DMA1_DST = DDR_DMA_BASE + banksize*1;
#else
DDR_DMA0_SRC = DDR_DMA_BASE + banksize*times;
DDR_DMA0_DST = DDR_DMA_BASE + banksize*(times+1) - testsize;
DDR_DMA1_SRC = DDR_DMA_BASE + banksize*(banks - 1) + testsize*2;
DDR_DMA1_DST = DDR_DMA_BASE + banksize*(banks - 1) + testsize*3;
#endif
cpu_clk = CFG_CPU_SPEED;
#ifdef DMA_CHANNEL0_EN
addr = DDR_DMA0_SRC;
for (i = 0; i < testsize; i += 4) {
*(volatile unsigned int *)(addr + i) = gen_verify_data(i);
}
#endif
#ifdef DMA_CHANNEL1_EN
addr = DDR_DMA1_SRC;
for (i = 0; i < testsize; i += 4) {
*(volatile unsigned int *)addr = gen_verify_data(i);
addr += 4;
}
#endif
REG_DMAC_DMACR(0) = 0;
// REG_DMAC_DMACR(1) = 0;
/* Init target buffer */
#ifdef DMA_CHANNEL0_EN
jzmemset((void *)DDR_DMA0_DST, 0, testsize);
dma_nodesc_test(0, DDR_DMA0_SRC, DDR_DMA0_DST, testsize);
#endif
#ifdef DMA_CHANNEL1_EN
jzmemset((void *)DDR_DMA1_DST, 0, testsize);
dma_nodesc_test(1, DDR_DMA1_SRC, DDR_DMA1_DST, testsize);
#endif
REG_DMAC_DMACR(0) = DMAC_DMACR_DMAE; /* global DMA enable bit */
// REG_DMAC_DMACR(1) = DMAC_DMACR_DMAE; /* global DMA enable bit */
// while(REG_DMAC_DTCR(0) || REG_DMAC_DTCR(1));
while(REG_DMAC_DTCR(0));
tmp = (cpu_clk / 1000000) * 1;
while (tmp--);
#ifdef DMA_CHANNEL0_EN
err = dma_check_result((void *)DDR_DMA0_SRC, (void *)DDR_DMA0_DST, testsize,print_flag);
REG_DMAC_DCCSR(0) &= ~DMAC_DCCSR_EN; /* disable DMA */
if(err == 0) {
serial_puts("passed:");
serial_put_hex(times);
} else {
serial_put_hex(times);
}
if (err != 0) {
#ifdef DMA_CHANNEL1_EN
REG_DMAC_DCCSR(1) &= ~DMAC_DCCSR_EN; /* disable DMA */
#endif
return err;
}
#endif
#ifdef DMA_CHANNEL1_EN
//err += dma_check_result((void *)DDR_DMA1_SRC, (void *)DDR_DMA1_DST, testsize);
//REG_DMAC_DCCSR(1) &= ~DMAC_DCCSR_EN; /* disable DMA */
#endif
}
return err;
}
void ddr_mem_init(int msel, int hl, int tsel, int arg)
{
volatile int tmp_cnt;
register unsigned int cpu_clk, ddr_twr;
register unsigned int ddrc_cfg_reg=0, init_ddrc_mdelay=0;
cpu_clk = CFG_CPU_SPEED;
#if defined(CONFIG_SDRAM_DDR2) // ddr2
ddrc_cfg_reg = DDRC_CFG_TYPE_DDR2 | (DDR_ROW-12)<<10
| (DDR_COL-8)<<8 | DDR_CS1EN<<7 | DDR_CS0EN<<6
| ((DDR_CL-1) | 0x8)<<2 | DDR_BANK8<<1 | DDR_DW32;
#elif defined(CONFIG_SDRAM_DDR1) // ddr1
ddrc_cfg_reg = DDRC_CFG_BTRUN |DDRC_CFG_TYPE_DDR1
| (DDR_ROW-12)<<10 | (DDR_COL-8)<<8 | DDR_CS1EN<<7 | DDR_CS0EN<<6
| ((DDR_CL_HALF?(DDR_CL&~0x8):((DDR_CL-1)|0x8))<<2)
| DDR_BANK8<<1 | DDR_DW32;
#else // mobile ddr
ddrc_cfg_reg = DDRC_CFG_TYPE_MDDR
| (DDR_ROW-12)<<10 | (DDR_COL-8)<<8 | DDR_CS1EN<<7 | DDR_CS0EN<<6
| ((DDR_CL-1) | 0x8)<<2 | DDR_BANK8<<1 | DDR_DW32;
#endif
ddrc_cfg_reg |= DDRC_CFG_MPRT;
#if defined(CONFIG_FPGA)
init_ddrc_mdelay= tsel<<18 | msel<<16 | hl<<15;
#else
init_ddrc_mdelay= tsel<<18 | msel<<16 | hl<<15 | arg << 14;
#endif
ddr_twr = ((REG_DDRC_TIMING1 & DDRC_TIMING1_TWR_MASK) >> DDRC_TIMING1_TWR_BIT) + 1;
REG_DDRC_CFG = ddrc_cfg_reg;
REG_DDRC_MDELAY = init_ddrc_mdelay | 1 << 6;
/***** init ddrc registers & ddr memory regs ****/
/* AR: auto refresh */
REG_DDRC_LMR = DDRC_LMR_CMD_AUREF | DDRC_LMR_START; //0x11;
/* Wait for DDR_tRP */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
/* Wait for number of auto-refresh cycles */
tmp_cnt = (cpu_clk / 1000000) * 10;
while (tmp_cnt--);
#if defined(CONFIG_SDRAM_DDR2) // ddr1 and mddr
/* Set CKE High */
REG_DDRC_CTRL = DDRC_CTRL_CKE; // ?
/* Wait for number of auto-refresh cycles */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
/* PREA */
REG_DDRC_LMR = DDRC_LMR_CMD_PREC | DDRC_LMR_START; //0x1;
/* Wait for DDR_tRP */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
/* EMR2: extend mode register2 */
REG_DDRC_LMR = DDRC_LMR_BA_EMRS2 | DDRC_LMR_CMD_LMR | DDRC_LMR_START;//0x221;
/* EMR3: extend mode register3 */
REG_DDRC_LMR = DDRC_LMR_BA_EMRS3 | DDRC_LMR_CMD_LMR | DDRC_LMR_START;//0x321;
/* EMR1: extend mode register1 */
REG_DDRC_LMR = (DDR_EMRS1_DQS_DIS << 16) | DDRC_LMR_BA_EMRS1 | DDRC_LMR_CMD_LMR | DDRC_LMR_START;
/* wait DDR_tMRD */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
/* MR - DLL Reset A1A0 burst 2 */
REG_DDRC_LMR = ((ddr_twr-1)<<9 | DDR2_MRS_DLL_RST | DDR_CL<<4 | DDR_MRS_BL_4)<< 16
| DDRC_LMR_BA_MRS | DDRC_LMR_CMD_LMR | DDRC_LMR_START;
/* wait DDR_tMRD */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
/* PREA */
REG_DDRC_LMR = DDRC_LMR_CMD_PREC | DDRC_LMR_START; //0x1;
/* Wait for DDR_tRP */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
/* AR: auto refresh */
REG_DDRC_LMR = DDRC_LMR_CMD_AUREF | DDRC_LMR_START; //0x11;
/* Wait for DDR_tRP */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
REG_DDRC_LMR = DDRC_LMR_CMD_AUREF | DDRC_LMR_START; //0x11;
/* Wait for DDR_tRP */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
/* MR - DLL Reset End */
REG_DDRC_LMR = ((ddr_twr-1)<<9 | DDR_CL<<4 | DDR_MRS_BL_4)<< 16
| DDRC_LMR_BA_MRS | DDRC_LMR_CMD_LMR | DDRC_LMR_START;
/* wait 200 tCK */
tmp_cnt = (cpu_clk / 1000000) * 2;
while (tmp_cnt--);
/* EMR1 - OCD Default */
REG_DDRC_LMR = (DDR_EMRS1_DQS_DIS | DDR_EMRS1_OCD_DFLT) << 16
| DDRC_LMR_BA_EMRS1 | DDRC_LMR_CMD_LMR | DDRC_LMR_START;
/* EMR1 - OCD Exit */
REG_DDRC_LMR = (DDR_EMRS1_DQS_DIS << 16) | DDRC_LMR_BA_EMRS1 | DDRC_LMR_CMD_LMR | DDRC_LMR_START;
/* wait DDR_tMRD */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
#elif defined(CONFIG_SDRAM_DDR1) // ddr1 and mddr
/* set cke high */
REG_DDRC_CTRL = DDRC_CTRL_CKE; // ?
/* Nop command */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
/* PREA all */
// REG_DDRC_LMR = DDRC_LMR_CMD_PREC | DDRC_LMR_START; //0x1;
/* Wait for DDR_tRP */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
/* EMR: extend mode register: enable DLL */
REG_DDRC_LMR = (DDR1_EMRS_OM_NORMAL | DDR1_EMRS_DS_FULL | DDR1_EMRS_DLL_EN) << 16
| DDRC_LMR_BA_N_EMRS | DDRC_LMR_CMD_LMR | DDRC_LMR_START;
/* MR DLL reset */
REG_DDRC_LMR = (DDR1_MRS_OM_DLLRST | (DDR_CL_HALF?(DDR_CL|0x4):DDR_CL)<<4 | DDR_MRS_BL_4)<< 16
| DDRC_LMR_BA_N_MRS | DDRC_LMR_CMD_LMR | DDRC_LMR_START;
/* wait DDR_tXSRD, 200 tCK */
tmp_cnt = (cpu_clk / 1000000) * 2;
while (tmp_cnt--);
/* PREA all */
REG_DDRC_LMR = DDRC_LMR_CMD_PREC | DDRC_LMR_START; //0x1;
REG_DDRC_LMR = DDRC_LMR_CMD_AUREF | DDRC_LMR_START; //0x11;
REG_DDRC_LMR = DDRC_LMR_CMD_AUREF | DDRC_LMR_START; //0x11;
tmp_cnt = (cpu_clk / 1000000) * 15;
while (tmp_cnt--);
/* EMR: extend mode register, clear dll en */
REG_DDRC_LMR = (DDR1_EMRS_OM_NORMAL | DDR1_EMRS_DS_FULL) << 16
| DDRC_LMR_BA_N_EMRS | DDRC_LMR_CMD_LMR | DDRC_LMR_START;
/* wait DDR_tMRD */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
#elif defined(CONFIG_SDRAM_MDDR) // ddr1 and mddr
REG_DDRC_CTRL = DDRC_CTRL_CKE; // ?
/* Wait for number of auto-refresh cycles */
tmp_cnt = (cpu_clk / 1000000) * 20;
while (tmp_cnt--);
/* PREA */
REG_DDRC_LMR = DDRC_LMR_CMD_PREC | DDRC_LMR_START; //0x1;
/* Wait for DDR_tRP */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
/* AR: auto refresh */
REG_DDRC_LMR = DDRC_LMR_CMD_AUREF | DDRC_LMR_START; //0x11;
/* wait DDR_tRFC */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
/* AR: auto refresh */
REG_DDRC_LMR = DDRC_LMR_CMD_AUREF | DDRC_LMR_START; //0x11;
/* wait DDR_tRFC */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
/* MR */
REG_DDRC_LMR = (DDR_CL<<4 | DDR_MRS_BL_4)<< 16
| DDRC_LMR_BA_M_MRS | DDRC_LMR_CMD_LMR | DDRC_LMR_START;
/* wait DDR_tMRD */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
/* EMR: extend mode register */
REG_DDRC_LMR = (DDR_EMRS_DS_HALF | DDR_EMRS_PRSR_ALL) << 16
| DDRC_LMR_BA_M_EMRS | DDRC_LMR_CMD_LMR | DDRC_LMR_START;
/* wait DDR_tMRD */
tmp_cnt = (cpu_clk / 1000000) * 1;
while (tmp_cnt--);
#endif
}
void testallmem()
{
unsigned int i,d;
unsigned int *dat;
dat = (unsigned int *)0xa0000000;
for(i = 0; i < 64*1024*1024;i+=4)
{
*dat = i;
dat++;
}
dat = (unsigned int *)0xa0000000;
for(i = 0; i < 64*1024*1024;i+=4)
{
d = *dat;
if(d != i)
{
serial_puts("errdata:\n");
serial_puts("expect:\n");
serial_put_hex(i);
serial_put_hex(d);
}
dat++;
}
}
#define DDR_DMA_BASE (0xa0000000) /*un-cached*/
void dma_data_move(int dma_chan, int dma_src_addr, int dma_dst_addr, int size, int burst)
{
int dma_src_phys_addr, dma_dst_phys_addr;
/* set addr to uncached */
dma_src_phys_addr = dma_src_addr & ~0xa0000000;
dma_dst_phys_addr = dma_dst_addr & ~0xa0000000;
/* Init DMA module */
REG_DMAC_DCCSR(dma_chan) = 0;
REG_DMAC_DRSR(dma_chan) = DMAC_DRSR_RS_AUTO;
REG_DMAC_DSAR(dma_chan) = dma_src_phys_addr;
REG_DMAC_DTAR(dma_chan) = dma_dst_phys_addr;
REG_DMAC_DTCR(dma_chan) = size / 32;
REG_DMAC_DCMD(dma_chan) = DMAC_DCMD_SAI | DMAC_DCMD_DAI | DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32 | burst;
// REG_DMAC_DCCSR(dma_chan) = DMAC_DCCSR_NDES | DMAC_DCCSR_EN;
}
static int check_result(void *src, void *dst, int size)
{
unsigned int addr1, addr2, i, err = 0;
addr1 = (unsigned int)src;
addr2 = (unsigned int)dst;
for (i = 0; i < size; i += 4) {
if ((*(volatile unsigned int *)addr1 != *(volatile unsigned int *)addr2)
|| (*(volatile unsigned int *)addr1 != (i/4*0x11111111))) {
#ifdef DEBUG
err++;
if (err < 10){
serial_puts("wrong data at");serial_put_hex(addr2);
serial_puts("data");serial_put_hex(i/4*0x11111111);
serial_puts("src");serial_put_hex(*(volatile unsigned int *)addr1);
serial_puts("dst");serial_put_hex(*(volatile unsigned int *)addr2);
}
#else
return 1;
#endif
}
addr1 += 4;
addr2 += 4;
}
return err;
}
#endif
#if (defined(CONFIG_SDRAM_MDDR) || defined(CONFIG_SDRAM_DDR1) || defined(CONFIG_SDRAM_DDR2))
#define DEF_DDR_CVT 0
#define DDR_USE_FIRST_ARGS 0
unsigned int testall = 0;
/* DDR sdram init */
void sdram_init_4760(void)
{
//add driver power
REG_EMC_PMEMPS2 |= (3 << 18);
REG_DMAC_DMADCKE(0) = 0x3f;
REG_DMAC_DMADCKE(1) = 0x3f;
int i, num = 0, tsel = 0, msel, hl;
volatile unsigned int tmp_cnt;
register unsigned int tmp, cpu_clk, mem_clk, ddr_twr, ns, ns_int;
register unsigned int ddrc_timing1_reg=0, ddrc_timing2_reg=0;
register unsigned int init_ddrc_refcnt=0, init_ddrc_dqs=0, init_ddrc_ctrl=0;
register unsigned int memsize, ddrc_mmap0_reg, ddrc_mmap1_reg;
register unsigned int mem_base0, mem_base1, mem_mask0, mem_mask1;
#if defined(CONFIG_FPGA)
int cvt = DEF_DDR_CVT, cvt_cnt0 = 0, cvt_cnt1 = 1;
int max = 0, max0 = 0, max1 = 0, min0 = 0, min1 = 0;
int tsel0 = 0, tsel1 = 0;
struct ddr_delay_sel_t ddr_delay_sel[] = {
{0, 1}, {0, 0}, {1, 1}, {1, 0},
{2, 1}, {2, 0}, {3, 1}, {3, 0}
};
#endif
testall = 0;
cpu_clk = CFG_CPU_SPEED;
#ifdef DEBUG
ddrc_regs_print();
#endif
#if defined(CONFIG_FPGA)
mem_clk = CFG_EXTAL / CFG_DIV;
ns = 7;
#else
mem_clk = __cpm_get_mclk();
ns = 1000000000 / mem_clk; /* ns per tck ns <= real value */
#endif
#ifdef DEBUG
serial_puts("mem_clk = ");
serial_put_hex(mem_clk);
#endif
/* ACTIVE to PRECHARGE command period */
tmp = (DDR_tRAS%ns == 0) ? (DDR_tRAS/ns) : (DDR_tRAS/ns+1);
if (tmp < 1) tmp = 1;
if (tmp > 31) tmp = 31;
ddrc_timing1_reg = ((tmp/2) << DDRC_TIMING1_TRAS_BIT);
/* READ to PRECHARGE command period. */
tmp = (DDR_tRTP%ns == 0) ? (DDR_tRTP/ns) : (DDR_tRTP/ns+1);
if (tmp < 1) tmp = 1;
if (tmp > 4) tmp = 4;
ddrc_timing1_reg |= ((tmp-1) << DDRC_TIMING1_TRTP_BIT);
/* PRECHARGE command period. */
tmp = (DDR_tRP%ns == 0) ? DDR_tRP/ns : (DDR_tRP/ns+1);
if (tmp < 1) tmp = 1;
if (tmp > 8) tmp = 8;
ddrc_timing1_reg |= ((tmp-1) << DDRC_TIMING1_TRP_BIT);
/* ACTIVE to READ or WRITE command period. */
tmp = (DDR_tRCD%ns == 0) ? DDR_tRCD/ns : (DDR_tRCD/ns+1);
if (tmp < 1) tmp = 1;
if (tmp > 8) tmp = 8;
ddrc_timing1_reg |= ((tmp-1) << DDRC_TIMING1_TRCD_BIT);
/* ACTIVE to ACTIVE command period. */
tmp = (DDR_tRC%ns == 0) ? DDR_tRC/ns : (DDR_tRC/ns+1);
if (tmp < 3) tmp = 3;
if (tmp > 31) tmp = 31;
ddrc_timing1_reg |= ((tmp/2) << DDRC_TIMING1_TRC_BIT);
/* ACTIVE bank A to ACTIVE bank B command period. */
tmp = (DDR_tRRD%ns == 0) ? DDR_tRRD/ns : (DDR_tRRD/ns+1);
if (tmp < 2) tmp = 2;
if (tmp > 4) tmp = 4;
ddrc_timing1_reg |= ((tmp-1) << DDRC_TIMING1_TRRD_BIT);
/* WRITE Recovery Time defined by register MR of DDR2 memory */
tmp = (DDR_tWR%ns == 0) ? DDR_tWR/ns : (DDR_tWR/ns+1);
tmp = (tmp < 1) ? 1 : tmp;
tmp = (tmp < 2) ? 2 : tmp;
tmp = (tmp > 6) ? 6 : tmp;
ddrc_timing1_reg |= ((tmp-1) << DDRC_TIMING1_TWR_BIT);
ddr_twr = tmp;
/* WRITE to READ command delay. */
tmp = (DDR_tWTR%ns == 0) ? DDR_tWTR/ns : (DDR_tWTR/ns+1);
if (tmp > 4) tmp = 4;
ddrc_timing1_reg |= ((tmp-1) << DDRC_TIMING1_TWTR_BIT);
/* WRITE to READ command delay. */
tmp = DDR_tWTR/ns;
if (tmp < 1) tmp = 1;
if (tmp > 4) tmp = 4;
ddrc_timing1_reg |= ((tmp-1) << DDRC_TIMING1_TWTR_BIT);
/* AUTO-REFRESH command period. */
tmp = (DDR_tRFC%ns == 0) ? DDR_tRFC/ns : (DDR_tRFC/ns+1);
if (tmp > 31) tmp = 31;
ddrc_timing2_reg = ((tmp/2) << DDRC_TIMING2_TRFC_BIT);
/* Minimum Self-Refresh / Deep-Power-Down time */
tmp = DDR_tMINSR/ns;
if (tmp < 9) tmp = 9;
if (tmp > 129) tmp = 129;
ddrc_timing2_reg |= (((tmp-1)/8-1) << DDRC_TIMING2_TMINSR_BIT);
ddrc_timing2_reg |= (DDR_tXP-1)<<4 | (DDR_tMRD-1);
init_ddrc_refcnt = DDR_CLK_DIV << 1 | DDRC_REFCNT_REF_EN;
ns_int = (1000000000%mem_clk == 0) ?
(1000000000/mem_clk) : (1000000000/mem_clk+1);
tmp = DDR_tREFI/ns_int;
tmp = tmp / (16 * (1 << DDR_CLK_DIV)) - 1;
if (tmp > 0xfff)
tmp = 0xfff;
if (tmp < 1)
tmp = 1;
init_ddrc_refcnt |= tmp << DDRC_REFCNT_CON_BIT;
init_ddrc_dqs = DDRC_DQS_AUTO | DDRC_DQS_DET;
/* precharge power down, disable power down */
/* precharge power down, if set active power down, |= DDRC_CTRL_ACTPD */
init_ddrc_ctrl = DDRC_CTRL_PDT_DIS | DDRC_CTRL_PRET_8 | DDRC_CTRL_UNALIGN | DDRC_CTRL_CKE;
/* Add Jz4760 chip here. Jz4760 chip have no cvt */
#define MAX_TSEL_VALUE 4
#define MAX_DELAY_VALUES 16 /* quars (2) * hls (2) * msels (4) */
int j, index, quar;
int mem_index[MAX_DELAY_VALUES];
#if 0 // probe
jzmemset(mem_index, 0, MAX_DELAY_VALUES);
for (i = 1; i < MAX_TSEL_VALUE; i ++) {
tsel = i;
for (j = 0; j < MAX_DELAY_VALUES; j++) {
msel = j/4;
hl = ((j/2)&1)^1;
quar = j&1;
/* reset ddrc_controller */
REG_DDRC_CTRL = DDRC_CTRL_RESET;
/* Wait for precharge, > 200us */
tmp_cnt = (cpu_clk / 1000000) * 200;
while (tmp_cnt--);
REG_DDRC_CTRL = 0x0;
REG_DDRC_TIMING1 = ddrc_timing1_reg;
REG_DDRC_TIMING2 = ddrc_timing2_reg;
ddr_mem_init(msel, hl, tsel, quar);
memsize = initdram(0);
mem_base0 = DDR_MEM_PHY_BASE >> 24;
mem_base1 = (DDR_MEM_PHY_BASE + memsize / (DDR_CS1EN + DDR_CS0EN)) >> 24;
mem_mask1 = mem_mask0 = 0xff &
~(((memsize/(DDR_CS1EN+DDR_CS0EN) >> 24)
- 1) & DDRC_MMAP_MASK_MASK);
ddrc_mmap0_reg = mem_base0 << DDRC_MMAP_BASE_BIT | mem_mask0;
ddrc_mmap1_reg = mem_base1 << DDRC_MMAP_BASE_BIT | mem_mask1;
REG_DDRC_MMAP0 = ddrc_mmap0_reg;
REG_DDRC_MMAP1 = ddrc_mmap1_reg;
REG_DDRC_REFCNT = init_ddrc_refcnt;
/* Enable DLL Detect */
REG_DDRC_DQS = init_ddrc_dqs;
while(!(REG_DDRC_DQS &( DDRC_DQS_ERROR | DDRC_DQS_READY)));
/* Set CKE High */
REG_DDRC_CTRL = init_ddrc_ctrl;
/* Wait for number of auto-refresh cycles */
tmp_cnt = (cpu_clk / 1000000) * 10;
while (tmp_cnt--);
/* Auto Refresh */
REG_DDRC_LMR = DDRC_LMR_CMD_AUREF | DDRC_LMR_START; //0x11;
/* Wait for number of auto-refresh cycles */
tmp_cnt = (cpu_clk / 1000000) * 10;
while (tmp_cnt--);
tmp_cnt = (cpu_clk / 1000000) * 10;
while (tmp_cnt--);
{
int result = 0;
result = ddr_dma_test(0);
if(result != 0)
serial_puts("FAIL!\n");
#if DEBUG
serial_puts("result:");
serial_put_hex(result);
serial_put_hex(num);
#endif
if(result != 0) {
if (num > 0)
break;
else
continue;
} else { /* test pass */
mem_index[num] = j;
num++;
}
}
}
if (num > 0)
break;
}
if (tsel == 3 && num == 0)
serial_puts("DDR INIT ERROR\n"); /* can't find a suitable mask delay. */
index = 0;
for (i = 0; i < num; i++) {
index += mem_index[i];
serial_put_hex(mem_index[i]);
}
#ifdef DEBUG
serial_puts("index-1:");
serial_put_hex(index);
#endif
if (num)
index /= num;
#endif
msel = index/4;
hl = ((index/2)&1)^1;
quar = index&1;
#ifdef DEBUG
serial_puts("tsel");
serial_put_hex(tsel);
serial_puts("num");
serial_put_hex(num);
serial_puts("index-2:");
serial_put_hex(index);
#endif
/* reset ddrc_controller */
REG_DDRC_CTRL = DDRC_CTRL_RESET;
/* Wait for precharge, > 200us */
tmp_cnt = (cpu_clk / 1000000) * 200;
while (tmp_cnt--);
REG_DDRC_CTRL = 0x0;
REG_DDRC_TIMING1 = ddrc_timing1_reg;
REG_DDRC_TIMING2 = ddrc_timing2_reg;
ddr_mem_init(msel, hl, tsel, quar);
memsize = initdram(0);
mem_base0 = DDR_MEM_PHY_BASE >> 24;
mem_base1 = (DDR_MEM_PHY_BASE + memsize / (DDR_CS1EN + DDR_CS0EN)) >> 24;
mem_mask1 = mem_mask0 = 0xff &
~(((memsize/(DDR_CS1EN+DDR_CS0EN) >> 24)
- 1) & DDRC_MMAP_MASK_MASK);
ddrc_mmap0_reg = mem_base0 << DDRC_MMAP_BASE_BIT | mem_mask0;
ddrc_mmap1_reg = mem_base1 << DDRC_MMAP_BASE_BIT | mem_mask1;
REG_DDRC_MMAP0 = ddrc_mmap0_reg;
REG_DDRC_MMAP1 = ddrc_mmap1_reg;
REG_DDRC_REFCNT = init_ddrc_refcnt;
/* Enable DLL Detect */
REG_DDRC_DQS = init_ddrc_dqs;
/* Set CKE High */
REG_DDRC_CTRL = init_ddrc_ctrl;
/* Wait for number of auto-refresh cycles */
tmp_cnt = (cpu_clk / 1000000) * 10;
while (tmp_cnt--);
/* Auto Refresh */
REG_DDRC_LMR = DDRC_LMR_CMD_AUREF | DDRC_LMR_START; //0x11;
/* Wait for number of auto-refresh cycles */
tmp_cnt = (cpu_clk / 1000000) * 10;
while (tmp_cnt--);
if(testall)
testallmem();
}
#else
void sdram_init_4760(void)
{
register unsigned int dmcr0, dmcr, sdmode, tmp, cpu_clk, mem_clk, ns;
unsigned int cas_latency_sdmr[2] = {
EMC_SDMR_CAS_2,
EMC_SDMR_CAS_3,
};
unsigned int cas_latency_dmcr[2] = {
1 << EMC_DMCR_TCL_BIT, /* CAS latency is 2 */
2 << EMC_DMCR_TCL_BIT /* CAS latency is 3 */
};
int div[] = {1, 2, 3, 4, 6, 8, 12, 16, 24, 32};
cpu_clk = CFG_CPU_SPEED;
mem_clk = cpu_clk * div[__cpm_get_cdiv()] / div[__cpm_get_mdiv()];
REG_EMC_BCR = 0; /* Disable bus release */
REG_EMC_RTCSR = 0; /* Disable clock for counting */
/* Fault DMCR value for mode register setting*/
#define SDRAM_ROW0 11
#define SDRAM_COL0 8
#define SDRAM_BANK40 0
dmcr0 = ((SDRAM_ROW0-11)<<EMC_DMCR_RA_BIT) |
((SDRAM_COL0-8)<<EMC_DMCR_CA_BIT) |
(SDRAM_BANK40<<EMC_DMCR_BA_BIT) |
(SDRAM_BW16<<EMC_DMCR_BW_BIT) |
EMC_DMCR_EPIN |
cas_latency_dmcr[((SDRAM_CASL == 3) ? 1 : 0)];
/* Basic DMCR value */
dmcr = ((SDRAM_ROW-11)<<EMC_DMCR_RA_BIT) |
((SDRAM_COL-8)<<EMC_DMCR_CA_BIT) |
(SDRAM_BANK4<<EMC_DMCR_BA_BIT) |
(SDRAM_BW16<<EMC_DMCR_BW_BIT) |
EMC_DMCR_EPIN |
cas_latency_dmcr[((SDRAM_CASL == 3) ? 1 : 0)];
/* SDRAM timimg */
ns = 1000000000 / mem_clk;
tmp = SDRAM_TRAS/ns;
if (tmp < 4) tmp = 4;
if (tmp > 11) tmp = 11;
dmcr |= ((tmp-4) << EMC_DMCR_TRAS_BIT);
tmp = SDRAM_RCD/ns;
if (tmp > 3) tmp = 3;
dmcr |= (tmp << EMC_DMCR_RCD_BIT);
tmp = SDRAM_TPC/ns;
if (tmp > 7) tmp = 7;
dmcr |= (tmp << EMC_DMCR_TPC_BIT);
tmp = SDRAM_TRWL/ns;
if (tmp > 3) tmp = 3;
dmcr |= (tmp << EMC_DMCR_TRWL_BIT);
tmp = (SDRAM_TRAS + SDRAM_TPC)/ns;
if (tmp > 14) tmp = 14;
dmcr |= (((tmp + 1) >> 1) << EMC_DMCR_TRC_BIT);
/* SDRAM mode value */
sdmode = EMC_SDMR_BT_SEQ |
EMC_SDMR_OM_NORMAL |
EMC_SDMR_BL_4 |
cas_latency_sdmr[((SDRAM_CASL == 3) ? 1 : 0)];
/* Stage 1. Precharge all banks by writing SDMR with DMCR.MRSET=0 */
REG_EMC_DMCR = dmcr;
REG8(EMC_SDMR0|sdmode) = 0;
/* Wait for precharge, > 200us */
tmp = (cpu_clk / 1000000) * 1000;
while (tmp--);
/* Stage 2. Enable auto-refresh */
REG_EMC_DMCR = dmcr | EMC_DMCR_RFSH;
tmp = SDRAM_TREF/ns;
tmp = tmp/64 + 1;
if (tmp > 0xff) tmp = 0xff;
REG_EMC_RTCOR = tmp;
REG_EMC_RTCNT = 0;
REG_EMC_RTCSR = EMC_RTCSR_CKS_64; /* Divisor is 64, CKO/64 */
/* Wait for number of auto-refresh cycles */
tmp = (cpu_clk / 1000000) * 1000;
while (tmp--);
/* Stage 3. Mode Register Set */
REG_EMC_DMCR = dmcr0 | EMC_DMCR_RFSH | EMC_DMCR_MRSET;
REG8(EMC_SDMR0|sdmode) = 0;
/* Set back to basic DMCR value */
REG_EMC_DMCR = dmcr | EMC_DMCR_RFSH | EMC_DMCR_MRSET;
/* everything is ok now */
}
#endif
static void serial_setbrg(void)
{
volatile u8 *uart_lcr = (volatile u8 *)(UART_BASE + OFF_LCR);
volatile u8 *uart_dlhr = (volatile u8 *)(UART_BASE + OFF_DLHR);
volatile u8 *uart_dllr = (volatile u8 *)(UART_BASE + OFF_DLLR);
u32 baud_div, tmp;
baud_div = (CFG_EXTAL / 16 / 57600);
tmp = *uart_lcr;
tmp |= UART_LCR_DLAB;
*uart_lcr = tmp;
*uart_dlhr = (baud_div >> 8) & 0xff;
*uart_dllr = baud_div & 0xff;
tmp &= ~UART_LCR_DLAB;
*uart_lcr = tmp;
}
void serial_init_4760(int uart)
{
UART_BASE = UART0_BASE + uart * UART_OFF;
volatile u8 *uart_fcr = (volatile u8 *)(UART_BASE + OFF_FCR);
volatile u8 *uart_lcr = (volatile u8 *)(UART_BASE + OFF_LCR);
volatile u8 *uart_ier = (volatile u8 *)(UART_BASE + OFF_IER);
volatile u8 *uart_sircr = (volatile u8 *)(UART_BASE + OFF_SIRCR);
/* Disable port interrupts while changing hardware */
*uart_ier = 0;
/* Disable UART unit function */
*uart_fcr = ~UART_FCR_UUE;
/* Set both receiver and transmitter in UART mode (not SIR) */
*uart_sircr = ~(SIRCR_RSIRE | SIRCR_TSIRE);
/* Set databits, stopbits and parity. (8-bit data, 1 stopbit, no parity) */
*uart_lcr = UART_LCR_WLEN_8 | UART_LCR_STOP_1;
/* Set baud rate */
serial_setbrg();
/* Enable UART unit, enable and clear FIFO */
*uart_fcr = UART_FCR_UUE | UART_FCR_FE | UART_FCR_TFLS | UART_FCR_RFLS;
}
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