| /* |
| * (C) Copyright 2001-2011 |
| * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| * |
| * Modified during 2001 by |
| * Advanced Communications Technologies (Australia) Pty. Ltd. |
| * Howard Walker, Tuong Vu-Dinh |
| * |
| * (C) Copyright 2001, Stuart Hughes, Lineo Inc, stuarth@lineo.com |
| * Added support for the 16M dram simm on the 8260ads boards |
| * |
| * 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 <common.h> |
| #include <ioports.h> |
| #include <i2c.h> |
| #include <mpc8260.h> |
| #include <pci.h> |
| |
| /* |
| * PBI Page Based Interleaving |
| * PSDMR_PBI page based interleaving |
| * 0 bank based interleaving |
| * External Address Multiplexing (EAMUX) adds a clock to address cycles |
| * (this can help with marginal board layouts) |
| * PSDMR_EAMUX adds a clock |
| * 0 no extra clock |
| * Buffer Command (BUFCMD) adds a clock to command cycles. |
| * PSDMR_BUFCMD adds a clock |
| * 0 no extra clock |
| */ |
| #define CONFIG_PBI 0 |
| #define PESSIMISTIC_SDRAM 0 |
| #define EAMUX 0 /* EST requires EAMUX */ |
| #define BUFCMD 0 |
| |
| |
| /* |
| * I/O Port configuration table |
| * |
| * if conf is 1, then that port pin will be configured at boot time |
| * according to the five values podr/pdir/ppar/psor/pdat for that entry |
| */ |
| |
| const iop_conf_t iop_conf_tab[4][32] = { |
| |
| /* Port A configuration */ |
| { /* conf ppar psor pdir podr pdat */ |
| /* PA31 */ { 0, 1, 0, 1, 0, 0 }, /* FCC1 TxENB */ |
| /* PA30 */ { 0, 1, 0, 0, 0, 0 }, /* FCC1 TxClav */ |
| /* PA29 */ { 0, 1, 0, 1, 0, 0 }, /* FCC1 TxSOC */ |
| /* PA28 */ { 0, 1, 0, 1, 0, 0 }, /* FCC1 RxENB */ |
| /* PA27 */ { 0, 1, 0, 0, 0, 0 }, /* FCC1 RxSOC */ |
| /* PA26 */ { 0, 1, 0, 0, 0, 0 }, /* FCC1 RxClav */ |
| /* PA25 */ { 0, 1, 0, 1, 0, 0 }, /* FCC1 ATMTXD[0] */ |
| /* PA24 */ { 0, 1, 0, 1, 0, 0 }, /* FCC1 ATMTXD[1] */ |
| /* PA23 */ { 0, 1, 0, 1, 0, 0 }, /* FCC1 ATMTXD[2] */ |
| /* PA22 */ { 0, 1, 0, 1, 0, 0 }, /* FCC1 ATMTXD[3] */ |
| /* PA21 */ { 0, 1, 0, 1, 0, 0 }, /* FCC1 ATMTXD[4] */ |
| /* PA20 */ { 0, 1, 0, 1, 0, 0 }, /* FCC1 ATMTXD[5] */ |
| /* PA19 */ { 0, 1, 0, 1, 0, 0 }, /* FCC1 ATMTXD[6] */ |
| /* PA18 */ { 0, 1, 0, 1, 0, 0 }, /* FCC1 ATMTXD[7] */ |
| /* PA17 */ { 0, 1, 0, 0, 0, 0 }, /* FCC1 ATMRXD[7] */ |
| /* PA16 */ { 0, 1, 0, 0, 0, 0 }, /* FCC1 ATMRXD[6] */ |
| /* PA15 */ { 0, 1, 0, 0, 0, 0 }, /* FCC1 ATMRXD[5] */ |
| /* PA14 */ { 0, 1, 0, 0, 0, 0 }, /* FCC1 ATMRXD[4] */ |
| /* PA13 */ { 0, 1, 0, 0, 0, 0 }, /* FCC1 ATMRXD[3] */ |
| /* PA12 */ { 0, 1, 0, 0, 0, 0 }, /* FCC1 ATMRXD[2] */ |
| /* PA11 */ { 0, 1, 0, 0, 0, 0 }, /* FCC1 ATMRXD[1] */ |
| /* PA10 */ { 0, 1, 0, 0, 0, 0 }, /* FCC1 ATMRXD[0] */ |
| /* PA9 */ { 0, 1, 1, 1, 0, 0 }, /* FCC1 L1TXD */ |
| /* PA8 */ { 0, 1, 1, 0, 0, 0 }, /* FCC1 L1RXD */ |
| /* PA7 */ { 0, 0, 0, 1, 0, 0 }, /* PA7 */ |
| /* PA6 */ { 1, 1, 1, 1, 0, 0 }, /* TDM A1 L1RSYNC */ |
| /* PA5 */ { 0, 0, 0, 1, 0, 0 }, /* PA5 */ |
| /* PA4 */ { 0, 0, 0, 1, 0, 0 }, /* PA4 */ |
| /* PA3 */ { 0, 0, 0, 1, 0, 0 }, /* PA3 */ |
| /* PA2 */ { 0, 0, 0, 1, 0, 0 }, /* PA2 */ |
| /* PA1 */ { 1, 0, 0, 0, 0, 0 }, /* FREERUN */ |
| /* PA0 */ { 0, 0, 0, 1, 0, 0 } /* PA0 */ |
| }, |
| |
| /* Port B configuration */ |
| { /* conf ppar psor pdir podr pdat */ |
| /* PB31 */ { 1, 1, 0, 1, 0, 0 }, /* FCC2 MII TX_ER */ |
| /* PB30 */ { 1, 1, 0, 0, 0, 0 }, /* FCC2 MII RX_DV */ |
| /* PB29 */ { 1, 1, 1, 1, 0, 0 }, /* FCC2 MII TX_EN */ |
| /* PB28 */ { 1, 1, 0, 0, 0, 0 }, /* FCC2 MII RX_ER */ |
| /* PB27 */ { 1, 1, 0, 0, 0, 0 }, /* FCC2 MII COL */ |
| /* PB26 */ { 1, 1, 0, 0, 0, 0 }, /* FCC2 MII CRS */ |
| /* PB25 */ { 1, 1, 0, 1, 0, 0 }, /* FCC2 MII TxD[3] */ |
| /* PB24 */ { 1, 1, 0, 1, 0, 0 }, /* FCC2 MII TxD[2] */ |
| /* PB23 */ { 1, 1, 0, 1, 0, 0 }, /* FCC2 MII TxD[1] */ |
| /* PB22 */ { 1, 1, 0, 1, 0, 0 }, /* FCC2 MII TxD[0] */ |
| /* PB21 */ { 1, 1, 0, 0, 0, 0 }, /* FCC2 MII RxD[0] */ |
| /* PB20 */ { 1, 1, 0, 0, 0, 0 }, /* FCC2 MII RxD[1] */ |
| /* PB19 */ { 1, 1, 0, 0, 0, 0 }, /* FCC2 MII RxD[2] */ |
| /* PB18 */ { 1, 1, 0, 0, 0, 0 }, /* FCC2 MII RxD[3] */ |
| /* PB17 */ { 0, 1, 0, 0, 0, 0 }, /* FCC3:RX_DIV */ |
| /* PB16 */ { 0, 1, 0, 0, 0, 0 }, /* FCC3:RX_ERR */ |
| /* PB15 */ { 0, 1, 0, 1, 0, 0 }, /* FCC3:TX_ERR */ |
| /* PB14 */ { 0, 1, 0, 1, 0, 0 }, /* FCC3:TX_EN */ |
| /* PB13 */ { 0, 1, 0, 0, 0, 0 }, /* FCC3:COL */ |
| /* PB12 */ { 0, 1, 0, 0, 0, 0 }, /* FCC3:CRS */ |
| /* PB11 */ { 0, 1, 0, 0, 0, 0 }, /* FCC3:RXD */ |
| /* PB10 */ { 0, 1, 0, 0, 0, 0 }, /* FCC3:RXD */ |
| /* PB9 */ { 0, 1, 0, 0, 0, 0 }, /* FCC3:RXD */ |
| /* PB8 */ { 0, 1, 0, 0, 0, 0 }, /* FCC3:RXD */ |
| /* PB7 */ { 0, 1, 0, 1, 0, 0 }, /* FCC3:TXD */ |
| /* PB6 */ { 0, 1, 0, 1, 0, 0 }, /* FCC3:TXD */ |
| /* PB5 */ { 0, 1, 0, 1, 0, 0 }, /* FCC3:TXD */ |
| /* PB4 */ { 0, 1, 0, 1, 0, 0 }, /* FCC3:TXD */ |
| /* PB3 */ { 0, 0, 0, 0, 0, 0 }, /* pin doesn't exist */ |
| /* PB2 */ { 0, 0, 0, 0, 0, 0 }, /* pin doesn't exist */ |
| /* PB1 */ { 0, 0, 0, 0, 0, 0 }, /* pin doesn't exist */ |
| /* PB0 */ { 0, 0, 0, 0, 0, 0 } /* pin doesn't exist */ |
| }, |
| |
| /* Port C */ |
| { /* conf ppar psor pdir podr pdat */ |
| /* PC31 */ { 0, 0, 0, 1, 0, 0 }, /* PC31 */ |
| /* PC30 */ { 0, 0, 0, 1, 0, 0 }, /* PC30 */ |
| /* PC29 */ { 0, 1, 1, 0, 0, 0 }, /* SCC1 EN *CLSN */ |
| /* PC28 */ { 0, 0, 0, 1, 0, 0 }, /* PC28 */ |
| /* PC27 */ { 0, 0, 0, 1, 0, 0 }, /* UART Clock in */ |
| /* PC26 */ { 0, 0, 0, 1, 0, 0 }, /* PC26 */ |
| /* PC25 */ { 0, 0, 0, 1, 0, 0 }, /* PC25 */ |
| /* PC24 */ { 0, 0, 0, 1, 0, 0 }, /* PC24 */ |
| /* PC23 */ { 0, 1, 0, 1, 0, 0 }, /* ATMTFCLK */ |
| /* PC22 */ { 0, 1, 0, 0, 0, 0 }, /* ATMRFCLK */ |
| /* PC21 */ { 0, 1, 0, 0, 0, 0 }, /* SCC1 EN RXCLK */ |
| /* PC20 */ { 0, 1, 0, 0, 0, 0 }, /* SCC1 EN TXCLK */ |
| /* PC19 */ { 1, 1, 0, 0, 0, 0 }, /* FCC2 MII RX_CLK CLK13 */ |
| /* PC18 */ { 1, 1, 0, 0, 0, 0 }, /* FCC Tx Clock (CLK14) */ |
| /* PC17 */ { 0, 0, 0, 1, 0, 0 }, /* PC17 */ |
| /* PC16 */ { 0, 1, 0, 0, 0, 0 }, /* FCC Tx Clock (CLK16) */ |
| /* PC15 */ { 0, 0, 0, 1, 0, 0 }, /* PC15 */ |
| /* PC14 */ { 0, 1, 0, 0, 0, 0 }, /* SCC1 EN *CD */ |
| /* PC13 */ { 0, 0, 0, 1, 0, 0 }, /* PC13 */ |
| /* PC12 */ { 0, 1, 0, 1, 0, 0 }, /* PC12 */ |
| /* PC11 */ { 0, 0, 0, 1, 0, 0 }, /* LXT971 transmit control */ |
| /* PC10 */ { 1, 0, 0, 1, 0, 0 }, /* LXT970 FETHMDC */ |
| /* PC9 */ { 1, 0, 0, 0, 0, 0 }, /* LXT970 FETHMDIO */ |
| /* PC8 */ { 0, 0, 0, 1, 0, 0 }, /* PC8 */ |
| /* PC7 */ { 0, 0, 0, 1, 0, 0 }, /* PC7 */ |
| /* PC6 */ { 0, 0, 0, 1, 0, 0 }, /* PC6 */ |
| /* PC5 */ { 0, 0, 0, 1, 0, 0 }, /* PC5 */ |
| /* PC4 */ { 0, 0, 0, 1, 0, 0 }, /* PC4 */ |
| /* PC3 */ { 0, 0, 0, 1, 0, 0 }, /* PC3 */ |
| /* PC2 */ { 0, 0, 0, 1, 0, 1 }, /* ENET FDE */ |
| /* PC1 */ { 0, 0, 0, 1, 0, 0 }, /* ENET DSQE */ |
| /* PC0 */ { 0, 0, 0, 1, 0, 0 }, /* ENET LBK */ |
| }, |
| |
| /* Port D */ |
| { /* conf ppar psor pdir podr pdat */ |
| /* PD31 */ { 1, 1, 0, 0, 0, 0 }, /* SCC1 EN RxD */ |
| /* PD30 */ { 1, 1, 1, 1, 0, 0 }, /* SCC1 EN TxD */ |
| /* PD29 */ { 0, 1, 0, 1, 0, 0 }, /* SCC1 EN TENA */ |
| /* PD28 */ { 0, 1, 0, 0, 0, 0 }, /* PD28 */ |
| /* PD27 */ { 0, 1, 1, 1, 0, 0 }, /* PD27 */ |
| /* PD26 */ { 0, 0, 0, 1, 0, 0 }, /* PD26 */ |
| /* PD25 */ { 0, 0, 0, 1, 0, 0 }, /* PD25 */ |
| /* PD24 */ { 0, 0, 0, 1, 0, 0 }, /* PD24 */ |
| /* PD23 */ { 0, 0, 0, 1, 0, 0 }, /* PD23 */ |
| /* PD22 */ { 0, 0, 0, 1, 0, 0 }, /* PD22 */ |
| /* PD21 */ { 0, 0, 0, 1, 0, 0 }, /* PD21 */ |
| /* PD20 */ { 0, 0, 0, 1, 0, 0 }, /* PD20 */ |
| /* PD19 */ { 0, 0, 0, 1, 0, 0 }, /* PD19 */ |
| /* PD18 */ { 0, 0, 0, 1, 0, 0 }, /* PD18 */ |
| /* PD17 */ { 0, 1, 0, 0, 0, 0 }, /* FCC1 ATMRXPRTY */ |
| /* PD16 */ { 0, 1, 0, 1, 0, 0 }, /* FCC1 ATMTXPRTY */ |
| /* PD15 */ { 1, 1, 1, 0, 1, 0 }, /* I2C SDA */ |
| /* PD14 */ { 1, 1, 1, 0, 1, 0 }, /* I2C SCL */ |
| /* PD13 */ { 0, 0, 0, 0, 0, 0 }, /* PD13 */ |
| /* PD12 */ { 0, 0, 0, 0, 0, 0 }, /* PD12 */ |
| /* PD11 */ { 0, 0, 0, 0, 0, 0 }, /* PD11 */ |
| /* PD10 */ { 0, 0, 0, 0, 0, 0 }, /* PD10 */ |
| /* PD9 */ { 1, 1, 0, 1, 0, 0 }, /* SMC1 TXD */ |
| /* PD8 */ { 1, 1, 0, 0, 0, 0 }, /* SMC1 RXD */ |
| /* PD7 */ { 0, 0, 0, 1, 0, 1 }, /* PD7 */ |
| /* PD6 */ { 0, 0, 0, 1, 0, 1 }, /* PD6 */ |
| /* PD5 */ { 0, 0, 0, 1, 0, 1 }, /* PD5 */ |
| /* PD4 */ { 0, 0, 0, 1, 0, 1 }, /* PD4 */ |
| /* PD3 */ { 0, 0, 0, 0, 0, 0 }, /* pin doesn't exist */ |
| /* PD2 */ { 0, 0, 0, 0, 0, 0 }, /* pin doesn't exist */ |
| /* PD1 */ { 0, 0, 0, 0, 0, 0 }, /* pin doesn't exist */ |
| /* PD0 */ { 0, 0, 0, 0, 0, 0 } /* pin doesn't exist */ |
| } |
| }; |
| |
| typedef struct bscr_ { |
| unsigned long bcsr0; |
| unsigned long bcsr1; |
| unsigned long bcsr2; |
| unsigned long bcsr3; |
| unsigned long bcsr4; |
| unsigned long bcsr5; |
| unsigned long bcsr6; |
| unsigned long bcsr7; |
| } bcsr_t; |
| |
| typedef struct pci_ic_s { |
| unsigned long pci_int_stat; |
| unsigned long pci_int_mask; |
| } pci_ic_t; |
| |
| void reset_phy(void) |
| { |
| volatile bcsr_t *bcsr = (bcsr_t *)CONFIG_SYS_BCSR; |
| |
| /* reset the FEC port */ |
| bcsr->bcsr1 &= ~FETH_RST; |
| bcsr->bcsr1 |= FETH_RST; |
| } |
| |
| |
| int board_early_init_f(void) |
| { |
| volatile bcsr_t *bcsr = (bcsr_t *)CONFIG_SYS_BCSR; |
| volatile pci_ic_t *pci_ic = (pci_ic_t *)CONFIG_SYS_PCI_INT; |
| |
| bcsr->bcsr1 = ~FETHIEN & ~RS232EN_1 & ~RS232EN_2; |
| |
| /* mask all PCI interrupts */ |
| pci_ic->pci_int_mask |= 0xfff00000; |
| |
| return 0; |
| } |
| |
| int checkboard(void) |
| { |
| puts("Board: Motorola MPC8266ADS\n"); |
| return 0; |
| } |
| |
| phys_size_t initdram(int board_type) |
| { |
| /* Autoinit part stolen from board/sacsng/sacsng.c */ |
| volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR; |
| volatile memctl8260_t *memctl = &immap->im_memctl; |
| volatile uchar c = 0xff; |
| volatile uchar *ramaddr = (uchar *) (CONFIG_SYS_SDRAM_BASE + 0x8); |
| uint psdmr = CONFIG_SYS_PSDMR; |
| int i; |
| |
| uint psrt = 0x21; /* for no SPD */ |
| uint chipselects = 1; /* for no SPD */ |
| uint sdram_size = CONFIG_SYS_SDRAM_SIZE * 1024 * 1024; /* for no SPD */ |
| uint or = CONFIG_SYS_OR2_PRELIM; /* for no SPD */ |
| uint data_width; |
| uint rows; |
| uint banks; |
| uint cols; |
| uint caslatency; |
| uint width; |
| uint rowst; |
| uint sdam; |
| uint bsma; |
| uint sda10; |
| u_char data; |
| u_char cksum; |
| int j; |
| |
| /* |
| * Keep the compiler from complaining about |
| * potentially uninitialized vars |
| */ |
| data_width = rows = banks = cols = caslatency = 0; |
| |
| /* |
| * Read the SDRAM SPD EEPROM via I2C. |
| */ |
| i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); |
| |
| i2c_read(SDRAM_SPD_ADDR, 0, 1, &data, 1); |
| cksum = data; |
| for (j = 1; j < 64; j++) { /* read only the checksummed bytes */ |
| /* note: the I2C address autoincrements when alen == 0 */ |
| i2c_read(SDRAM_SPD_ADDR, 0, 0, &data, 1); |
| /*printf("addr %d = 0x%02x\n", j, data); */ |
| if (j == 5) |
| chipselects = data & 0x0F; |
| else if (j == 6) |
| data_width = data; |
| else if (j == 7) |
| data_width |= data << 8; |
| else if (j == 3) |
| rows = data & 0x0F; |
| else if (j == 4) |
| cols = data & 0x0F; |
| else if (j == 12) { |
| /* |
| * Refresh rate: this assumes the prescaler is set to |
| * approximately 0.39uSec per tick and the target |
| * refresh period is about 85% of maximum. |
| */ |
| switch (data & 0x7F) { |
| default: |
| case 0: |
| psrt = 0x21; /* 15.625uS */ |
| break; |
| case 1: |
| psrt = 0x07; /* 3.9uS */ |
| break; |
| case 2: |
| psrt = 0x0F; /* 7.8uS */ |
| break; |
| case 3: |
| psrt = 0x43; /* 31.3uS */ |
| break; |
| case 4: |
| psrt = 0x87; /* 62.5uS */ |
| break; |
| case 5: |
| psrt = 0xFF; /* 125uS */ |
| break; |
| } |
| } else if (j == 17) |
| banks = data; |
| else if (j == 18) { |
| caslatency = 3; /* default CL */ |
| #if (PESSIMISTIC_SDRAM) |
| if ((data & 0x04) != 0) |
| caslatency = 3; |
| else if ((data & 0x02) != 0) |
| caslatency = 2; |
| else if ((data & 0x01) != 0) |
| caslatency = 1; |
| #else |
| if ((data & 0x01) != 0) |
| caslatency = 1; |
| else if ((data & 0x02) != 0) |
| caslatency = 2; |
| else if ((data & 0x04) != 0) |
| caslatency = 3; |
| #endif |
| else { |
| printf("WARNING: Unknown CAS latency 0x%02X, using 3\n", |
| data); |
| } |
| } else if (j == 63) { |
| if (data != cksum) { |
| printf("WARNING: Configuration data checksum failure:" |
| " is 0x%02x, calculated 0x%02x\n", |
| data, cksum); |
| } |
| } |
| cksum += data; |
| } |
| |
| /* We don't trust CL less than 2 (only saw it on an old 16MByte DIMM) */ |
| if (caslatency < 2) { |
| printf("CL was %d, forcing to 2\n", caslatency); |
| caslatency = 2; |
| } |
| if (rows > 14) { |
| printf("This doesn't look good, rows = %d, should be <= 14\n", |
| rows); |
| rows = 14; |
| } |
| if (cols > 11) { |
| printf("This doesn't look good, columns = %d, should be <= 11\n", |
| cols); |
| cols = 11; |
| } |
| |
| if ((data_width != 64) && (data_width != 72)) { |
| printf("WARNING: SDRAM width unsupported, is %d, expected 64 or 72.\n", |
| data_width); |
| } |
| width = 3; /* 2^3 = 8 bytes = 64 bits wide */ |
| /* |
| * Convert banks into log2(banks) |
| */ |
| if (banks == 2) |
| banks = 1; |
| else if (banks == 4) |
| banks = 2; |
| else if (banks == 8) |
| banks = 3; |
| |
| |
| sdram_size = 1 << (rows + cols + banks + width); |
| /* hack for high density memory (512MB per CS) */ |
| /* !!!!! Will ONLY work with Page Based Interleave !!!!! |
| ( PSDMR[PBI] = 1 ) |
| */ |
| /* |
| * memory actually has 11 column addresses, but the memory |
| * controller doesn't really care. |
| * |
| * the calculations that follow will however move the rows so |
| * that they are muxed one bit off if you use 11 bit columns. |
| * |
| * The solution is to tell the memory controller the correct |
| * size of the memory but change the number of columns to 10 |
| * afterwards. |
| * |
| * The 11th column addre will still be mucxed correctly onto |
| * the bus. |
| * |
| * Also be aware that the MPC8266ADS board Rev B has not |
| * connected Row address 13 to anything. |
| * |
| * The fix is to connect ADD16 (from U37-47) to SADDR12 (U28-126) |
| */ |
| if (cols > 10) |
| cols = 10; |
| |
| #if (CONFIG_PBI == 0) /* bank-based interleaving */ |
| rowst = ((32 - 6) - (rows + cols + width)) * 2; |
| #else |
| rowst = 32 - (rows + banks + cols + width); |
| #endif |
| |
| or = ~(sdram_size - 1) | /* SDAM address mask */ |
| ((banks - 1) << 13) | /* banks per device */ |
| (rowst << 9) | /* rowst */ |
| ((rows - 9) << 6); /* numr */ |
| |
| |
| /*printf("memctl->memc_or2 = 0x%08x\n", or); */ |
| |
| /* |
| * SDAM specifies the number of columns that are multiplexed |
| * (reference AN2165/D), defined to be (columns - 6) for page |
| * interleave, (columns - 8) for bank interleave. |
| * |
| * BSMA is 14 - max(rows, cols). The bank select lines come |
| * into play above the highest "address" line going into the |
| * the SDRAM. |
| */ |
| #if (CONFIG_PBI == 0) /* bank-based interleaving */ |
| sdam = cols - 8; |
| bsma = ((31 - width) - 14) - ((rows > cols) ? rows : cols); |
| sda10 = sdam + 2; |
| #else |
| sdam = cols + banks - 8; |
| bsma = ((31 - width) - 14) - ((rows > cols) ? rows : cols); |
| sda10 = sdam; |
| #endif |
| #if (PESSIMISTIC_SDRAM) |
| psdmr = (CONFIG_PBI | PSDMR_RFEN | PSDMR_RFRC_16_CLK | |
| PSDMR_PRETOACT_8W | PSDMR_ACTTORW_8W | PSDMR_WRC_4C | |
| PSDMR_EAMUX | PSDMR_BUFCMD) | caslatency | |
| ((caslatency - 1) << 6) | /* LDOTOPRE is CL - 1 */ |
| (sdam << 24) | (bsma << 21) | (sda10 << 18); |
| #else |
| psdmr = (CONFIG_PBI | PSDMR_RFEN | PSDMR_RFRC_7_CLK | |
| PSDMR_PRETOACT_3W | /* 1 for 7E parts (fast PC-133) */ |
| PSDMR_ACTTORW_2W | /* 1 for 7E parts (fast PC-133) */ |
| PSDMR_WRC_1C | /* 1 clock + 7nSec */ |
| EAMUX | BUFCMD) | caslatency | |
| ((caslatency - 1) << 6) | /* LDOTOPRE is CL - 1 */ |
| (sdam << 24) | (bsma << 21) | (sda10 << 18); |
| #endif |
| /*printf("psdmr = 0x%08x\n", psdmr); */ |
| |
| /* |
| * Quote from 8260 UM (10.4.2 SDRAM Power-On Initialization, 10-35): |
| * |
| * "At system reset, initialization software must set up the |
| * programmable parameters in the memory controller banks registers |
| * (ORx, BRx, P/LSDMR). After all memory parameters are configured, |
| * system software should execute the following initialization sequence |
| * for each SDRAM device. |
| * |
| * 1. Issue a PRECHARGE-ALL-BANKS command |
| * 2. Issue eight CBR REFRESH commands |
| * 3. Issue a MODE-SET command to initialize the mode register |
| * |
| * Quote from Micron MT48LC8M16A2 data sheet: |
| * |
| * "...the SDRAM requires a 100uS delay prior to issuing any |
| * command other than a COMMAND INHIBIT or NOP. Starting at some |
| * point during this 100uS period and continuing at least through |
| * the end of this period, COMMAND INHIBIT or NOP commands should |
| * be applied." |
| * |
| * "Once the 100uS delay has been satisfied with at least one COMMAND |
| * INHIBIT or NOP command having been applied, a /PRECHARGE command/ |
| * should be applied. All banks must then be precharged, thereby |
| * placing the device in the all banks idle state." |
| * |
| * "Once in the idle state, /two/ AUTO REFRESH cycles must be |
| * performed. After the AUTO REFRESH cycles are complete, the |
| * SDRAM is ready for mode register programming." |
| * |
| * (/emphasis/ mine, gvb) |
| * |
| * The way I interpret this, Micron start up sequence is: |
| * 1. Issue a PRECHARGE-BANK command (initial precharge) |
| * 2. Issue a PRECHARGE-ALL-BANKS command ("all banks ... precharged") |
| * 3. Issue two (presumably, doing eight is OK) CBR REFRESH commands |
| * 4. Issue a MODE-SET command to initialize the mode register |
| * |
| * -------- |
| * |
| * The initial commands are executed by setting P/LSDMR[OP] and |
| * accessing the SDRAM with a single-byte transaction." |
| * |
| * The appropriate BRx/ORx registers have already been set |
| * when we get here. The SDRAM can be accessed at the address |
| * CONFIG_SYS_SDRAM_BASE. |
| */ |
| |
| memctl->memc_mptpr = CONFIG_SYS_MPTPR; |
| memctl->memc_psrt = psrt; |
| |
| memctl->memc_br2 = CONFIG_SYS_BR2_PRELIM; |
| memctl->memc_or2 = or; |
| |
| memctl->memc_psdmr = psdmr | PSDMR_OP_PREA; |
| *ramaddr = c; |
| |
| memctl->memc_psdmr = psdmr | PSDMR_OP_CBRR; |
| for (i = 0; i < 8; i++) |
| *ramaddr = c; |
| |
| memctl->memc_psdmr = psdmr | PSDMR_OP_MRW; |
| *ramaddr = c; |
| |
| memctl->memc_psdmr = psdmr | PSDMR_OP_NORM | PSDMR_RFEN; |
| *ramaddr = c; |
| |
| /* |
| * Do it a second time for the second set of chips if the DIMM has |
| * two chip selects (double sided). |
| */ |
| if (chipselects > 1) { |
| ramaddr += sdram_size; |
| |
| memctl->memc_br3 = CONFIG_SYS_BR3_PRELIM + sdram_size; |
| memctl->memc_or3 = or; |
| |
| memctl->memc_psdmr = psdmr | PSDMR_OP_PREA; |
| *ramaddr = c; |
| |
| memctl->memc_psdmr = psdmr | PSDMR_OP_CBRR; |
| for (i = 0; i < 8; i++) |
| *ramaddr = c; |
| |
| memctl->memc_psdmr = psdmr | PSDMR_OP_MRW; |
| *ramaddr = c; |
| |
| memctl->memc_psdmr = psdmr | PSDMR_OP_NORM | PSDMR_RFEN; |
| *ramaddr = c; |
| } |
| |
| /* print info */ |
| printf("SDRAM configuration read from SPD\n"); |
| printf("\tSize per side = %dMB\n", sdram_size >> 20); |
| printf("\tOrganization: %d sides, %d banks, %d Columns, %d Rows, Data width = %d bits\n", |
| chipselects, 1 << (banks), cols, rows, data_width); |
| printf("\tRefresh rate = %d, CAS latency = %d", psrt, caslatency); |
| #if (CONFIG_PBI == 0) /* bank-based interleaving */ |
| printf(", Using Bank Based Interleave\n"); |
| #else |
| printf(", Using Page Based Interleave\n"); |
| #endif |
| printf("\tTotal size: "); |
| |
| /* this delay only needed for original 16MB DIMM... |
| * Not needed for any other memory configuration */ |
| if ((sdram_size * chipselects) == (16 * 1024 * 1024)) |
| udelay(250000); |
| |
| return sdram_size * chipselects; |
| } |
| |
| #ifdef CONFIG_PCI |
| struct pci_controller hose; |
| |
| extern void pci_mpc8250_init(struct pci_controller *); |
| |
| void pci_init_board(void) |
| { |
| pci_mpc8250_init(&hose); |
| } |
| #endif |
