diff options
Diffstat (limited to 'arch/mips/cpu/xburst/jz4740.c')
| -rw-r--r-- | arch/mips/cpu/xburst/jz4740.c | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/arch/mips/cpu/xburst/jz4740.c b/arch/mips/cpu/xburst/jz4740.c deleted file mode 100644 index 30f35bd..0000000 --- a/arch/mips/cpu/xburst/jz4740.c +++ /dev/null @@ -1,235 +0,0 @@ -/* - * Jz4740 common routines - * Copyright (c) 2006 Ingenic Semiconductor, <jlwei@ingenic.cn> - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <config.h> -#include <common.h> -#include <asm/io.h> -#include <asm/jz4740.h> - -void enable_interrupts(void) -{ -} - -int disable_interrupts(void) -{ - return 0; -} - -/* - * PLL output clock = EXTAL * NF / (NR * NO) - * NF = FD + 2, NR = RD + 2 - * NO = 1 (if OD = 0), NO = 2 (if OD = 1 or 2), NO = 4 (if OD = 3) - */ -void pll_init(void) -{ - struct jz4740_cpm *cpm = (struct jz4740_cpm *)JZ4740_CPM_BASE; - - register unsigned int cfcr, plcr1; - int n2FR[33] = { - 0, 0, 1, 2, 3, 0, 4, 0, 5, 0, 0, 0, 6, 0, 0, 0, - 7, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, - 9 - }; - int div[5] = {1, 3, 3, 3, 3}; /* divisors of I:S:P:L:M */ - int nf, pllout2; - - cfcr = CPM_CPCCR_CLKOEN | - CPM_CPCCR_PCS | - (n2FR[div[0]] << CPM_CPCCR_CDIV_BIT) | - (n2FR[div[1]] << CPM_CPCCR_HDIV_BIT) | - (n2FR[div[2]] << CPM_CPCCR_PDIV_BIT) | - (n2FR[div[3]] << CPM_CPCCR_MDIV_BIT) | - (n2FR[div[4]] << CPM_CPCCR_LDIV_BIT); - - pllout2 = (cfcr & CPM_CPCCR_PCS) ? - CONFIG_SYS_CPU_SPEED : (CONFIG_SYS_CPU_SPEED / 2); - - /* Init USB Host clock, pllout2 must be n*48MHz */ - writel(pllout2 / 48000000 - 1, &cpm->uhccdr); - - nf = CONFIG_SYS_CPU_SPEED * 2 / CONFIG_SYS_EXTAL; - plcr1 = ((nf - 2) << CPM_CPPCR_PLLM_BIT) | /* FD */ - (0 << CPM_CPPCR_PLLN_BIT) | /* RD=0, NR=2 */ - (0 << CPM_CPPCR_PLLOD_BIT) | /* OD=0, NO=1 */ - (0x20 << CPM_CPPCR_PLLST_BIT) | /* PLL stable time */ - CPM_CPPCR_PLLEN; /* enable PLL */ - - /* init PLL */ - writel(cfcr, &cpm->cpccr); - writel(plcr1, &cpm->cppcr); -} - -void sdram_init(void) -{ - struct jz4740_emc *emc = (struct jz4740_emc *)JZ4740_EMC_BASE; - - 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 = CONFIG_SYS_CPU_SPEED; - mem_clk = cpu_clk * div[__cpm_get_cdiv()] / div[__cpm_get_mdiv()]; - - writel(0, &emc->bcr); /* Disable bus release */ - writew(0, &emc->rtcsr); /* 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 */ - writel(dmcr, &emc->dmcr); - writeb(0, JZ4740_EMC_SDMR0 | sdmode); - - /* Wait for precharge, > 200us */ - tmp = (cpu_clk / 1000000) * 1000; - while (tmp--) - ; - - /* Stage 2. Enable auto-refresh */ - writel(dmcr | EMC_DMCR_RFSH, &emc->dmcr); - - tmp = SDRAM_TREF / ns; - tmp = tmp / 64 + 1; - if (tmp > 0xff) - tmp = 0xff; - writew(tmp, &emc->rtcor); - writew(0, &emc->rtcnt); - /* Divisor is 64, CKO/64 */ - writew(EMC_RTCSR_CKS_64, &emc->rtcsr); - - /* Wait for number of auto-refresh cycles */ - tmp = (cpu_clk / 1000000) * 1000; - while (tmp--) - ; - - /* Stage 3. Mode Register Set */ - writel(dmcr0 | EMC_DMCR_RFSH | EMC_DMCR_MRSET, &emc->dmcr); - writeb(0, JZ4740_EMC_SDMR0 | sdmode); - - /* Set back to basic DMCR value */ - writel(dmcr | EMC_DMCR_RFSH | EMC_DMCR_MRSET, &emc->dmcr); - - /* everything is ok now */ -} - -DECLARE_GLOBAL_DATA_PTR; - -void calc_clocks(void) -{ - unsigned int pllout; - unsigned int div[10] = {1, 2, 3, 4, 6, 8, 12, 16, 24, 32}; - - pllout = __cpm_get_pllout(); - - gd->cpu_clk = pllout / div[__cpm_get_cdiv()]; - gd->arch.sys_clk = pllout / div[__cpm_get_hdiv()]; - gd->arch.per_clk = pllout / div[__cpm_get_pdiv()]; - gd->mem_clk = pllout / div[__cpm_get_mdiv()]; - gd->arch.dev_clk = CONFIG_SYS_EXTAL; -} - -void rtc_init(void) -{ - struct jz4740_rtc *rtc = (struct jz4740_rtc *)JZ4740_RTC_BASE; - - while (!(readl(&rtc->rcr) & RTC_RCR_WRDY)) - ; - writel(readl(&rtc->rcr) | RTC_RCR_AE, &rtc->rcr); /* enable alarm */ - - while (!(readl(&rtc->rcr) & RTC_RCR_WRDY)) - ; - writel(0x00007fff, &rtc->rgr); /* type value */ - - while (!(readl(&rtc->rcr) & RTC_RCR_WRDY)) - ; - writel(0x0000ffe0, &rtc->hwfcr); /* Power on delay 2s */ - - while (!(readl(&rtc->rcr) & RTC_RCR_WRDY)) - ; - writel(0x00000fe0, &rtc->hrcr); /* reset delay 125ms */ -} - -/* U-Boot common routines */ -phys_size_t initdram(int board_type) -{ - struct jz4740_emc *emc = (struct jz4740_emc *)JZ4740_EMC_BASE; - u32 dmcr; - u32 rows, cols, dw, banks; - ulong size; - - dmcr = readl(&emc->dmcr); - rows = 11 + ((dmcr & EMC_DMCR_RA_MASK) >> EMC_DMCR_RA_BIT); - cols = 8 + ((dmcr & EMC_DMCR_CA_MASK) >> EMC_DMCR_CA_BIT); - dw = (dmcr & EMC_DMCR_BW) ? 2 : 4; - banks = (dmcr & EMC_DMCR_BA) ? 4 : 2; - - size = (1 << (rows + cols)) * dw * banks; - - return size; -} |