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Diffstat (limited to 'board/hermes/hermes.c')
-rw-r--r-- | board/hermes/hermes.c | 637 |
1 files changed, 637 insertions, 0 deletions
diff --git a/board/hermes/hermes.c b/board/hermes/hermes.c new file mode 100644 index 0000000..97a7745 --- /dev/null +++ b/board/hermes/hermes.c @@ -0,0 +1,637 @@ +/* + * (C) Copyright 2000 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * 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 <commproc.h> +#include <mpc8xx.h> + +#ifdef CONFIG_SHOW_BOOT_PROGRESS +# include <status_led.h> +# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg) +#else +# define SHOW_BOOT_PROGRESS(arg) +#endif + +/* ------------------------------------------------------------------------- */ + +static long int dram_size (long int, long int *, long int); +static ulong board_init (void); +static void send_smi_frame (volatile scc_t * sp, volatile cbd_t * bd, + uchar * msg); + +/* ------------------------------------------------------------------------- */ + +#define _NOT_USED_ 0xFFFFFFFF + +const uint sdram_table[] = { + /* + * Single Read. (Offset 0 in UPMA RAM) + */ + 0x1f07fc04, 0xeeaefc04, 0x11adfc04, 0xefbbbc00, + 0x1ff77c47, /* last */ + /* + * SDRAM Initialization (offset 5 in UPMA RAM) + * + * This is no UPM entry point. The following definition uses + * the remaining space to establish an initialization + * sequence, which is executed by a RUN command. + * + */ + 0x1fe77c35, 0xffaffc34, 0x1fa57c35, /* last */ + /* + * Burst Read. (Offset 8 in UPMA RAM) + */ + 0x1f07fc04, 0xeeaefc04, 0x10adfc04, 0xf0affc00, + 0xf0affc00, 0xf1affc00, 0xefbbbc00, 0x1ff77c47, /* last */ + _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, + _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, + /* + * Single Write. (Offset 18 in UPMA RAM) + */ + 0x1f27fc04, 0xeeaebc00, 0x01b93c04, 0x1ff77c47, /* last */ + _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, + /* + * Burst Write. (Offset 20 in UPMA RAM) + */ + 0x1f07fc04, 0xeeaebc00, 0x10ad4c00, 0xf0afcc00, + 0xf0afcc00, 0xe1bb8c06, 0x1ff77c47, /* last */ + _NOT_USED_, + _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, + _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, + /* + * Refresh (Offset 30 in UPMA RAM) + */ + 0x1ff5fc84, 0xfffffc04, 0xfffffc04, 0xfffffc04, + 0xfffffc84, 0xfffffc07, /* last */ + _NOT_USED_, _NOT_USED_, + _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, + /* + * Exception. (Offset 3c in UPMA RAM) + */ + 0x7ffffc07, /* last */ + _NOT_USED_, _NOT_USED_, _NOT_USED_, +}; + +/* ------------------------------------------------------------------------- */ + + +/* + * Check Board Identity: + * + * Test ID string (HERMES...) + * + * Return code for board revision and network speed + */ + +int checkboard (void) +{ + DECLARE_GLOBAL_DATA_PTR; + + unsigned char *s = getenv ("serial#"); + unsigned char *e; + + puts ("Board: "); + + if (!s || strncmp (s, "HERMES", 6)) { + puts ("### No HW ID - assuming HERMES-PRO"); + } else { + for (e = s; *e; ++e) { + if (*e == ' ') + break; + } + + for (; s < e; ++s) { + putc (*s); + } + } + + gd->board_type = board_init (); + + printf (" Rev. %ld.x\n", (gd->board_type >> 16)); + + return (0); +} + +/* ------------------------------------------------------------------------- */ + +long int initdram (int board_type) +{ + volatile immap_t *immap = (immap_t *) CFG_IMMR; + volatile memctl8xx_t *memctl = &immap->im_memctl; + long int size, size8, size9; + + upmconfig (UPMA, (uint *) sdram_table, + sizeof (sdram_table) / sizeof (uint)); + + /* + * Preliminary prescaler for refresh + */ + memctl->memc_mptpr = 0x0400; + + memctl->memc_mar = 0x00000088; + + /* + * Map controller banks 1 to the SDRAM banks at preliminary address + */ + memctl->memc_or1 = CFG_OR1_PRELIM; + memctl->memc_br1 = CFG_BR1_PRELIM; + + /* HERMES-PRO boards have only one bank SDRAM */ + + + udelay (200); + + /* perform SDRAM initializsation sequence */ + + memctl->memc_mamr = 0xD0802114; + memctl->memc_mcr = 0x80002105; + udelay (1); + memctl->memc_mamr = 0xD0802118; + memctl->memc_mcr = 0x80002130; + udelay (1); + memctl->memc_mamr = 0xD0802114; + memctl->memc_mcr = 0x80002106; + + udelay (1000); + + /* + * Check Bank 0 Memory Size for re-configuration + * + * try 8 column mode + */ + size8 = dram_size (CFG_MAMR_8COL, (ulong *) SDRAM_BASE_PRELIM, + SDRAM_MAX_SIZE); + + udelay (1000); + + /* + * try 9 column mode + */ + size9 = dram_size (CFG_MAMR_9COL, (ulong *) SDRAM_BASE_PRELIM, + SDRAM_MAX_SIZE); + + if (size8 < size9) { /* leave configuration at 9 columns */ + size = size9; +/* debug ("SDRAM Bank 0 in 9 column mode: %ld MB\n", size >> 20); */ + } else { /* back to 8 columns */ + size = size8; + memctl->memc_mamr = CFG_MAMR_8COL; + udelay (500); +/* debug ("SDRAM Bank 0 in 8 column mode: %ld MB\n", size >> 20); */ + } + + udelay (1000); + + memctl->memc_or1 = ((-size) & 0xFFFF0000) | SDRAM_TIMING; + memctl->memc_br1 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V; + + udelay (10000); + + return (size); +} + +/* ------------------------------------------------------------------------- */ + +/* + * Check memory range for valid RAM. A simple memory test determines + * the actually available RAM size between addresses `base' and + * `base + maxsize'. Some (not all) hardware errors are detected: + * - short between address lines + * - short between data lines + */ + +static long int dram_size (long int mamr_value, long int *base, + long int maxsize) +{ + volatile immap_t *immap = (immap_t *) CFG_IMMR; + volatile memctl8xx_t *memctl = &immap->im_memctl; + volatile long int *addr; + ulong cnt, val; + ulong save[32]; /* to make test non-destructive */ + unsigned char i = 0; + + memctl->memc_mamr = mamr_value; + + for (cnt = maxsize / sizeof (long); cnt > 0; cnt >>= 1) { + addr = base + cnt; /* pointer arith! */ + + save[i++] = *addr; + *addr = ~cnt; + } + + /* write 0 to base address */ + addr = base; + save[i] = *addr; + *addr = 0; + + /* check at base address */ + if ((val = *addr) != 0) { + *addr = save[i]; + return (0); + } + + for (cnt = 1; cnt <= maxsize / sizeof (long); cnt <<= 1) { + addr = base + cnt; /* pointer arith! */ + + val = *addr; + *addr = save[--i]; + + if (val != (~cnt)) { + return (cnt * sizeof (long)); + } + } + return (maxsize); +} + +/* ------------------------------------------------------------------------- */ + +#define PB_LED_3 0x00020000 /* Status LED's */ +#define PB_LED_2 0x00010000 +#define PB_LED_1 0x00008000 +#define PB_LED_0 0x00004000 + +#define PB_LED_ALL (PB_LED_0 | PB_LED_1 | PB_LED_2 | PB_LED_3) + +#define PC_REP_SPD1 0x00000800 +#define PC_REP_SPD0 0x00000400 + +#define PB_RESET_2081 0x00000020 /* Reset PEB2081 */ + +#define PB_MAI_4 0x00000010 /* Configuration */ +#define PB_MAI_3 0x00000008 +#define PB_MAI_2 0x00000004 +#define PB_MAI_1 0x00000002 +#define PB_MAI_0 0x00000001 + +#define PB_MAI_ALL (PB_MAI_0 | PB_MAI_1 | PB_MAI_2 | PB_MAI_3 | PB_MAI_4) + + +#define PC_REP_MGRPRS 0x0200 +#define PC_REP_SPD 0x0040 /* Select 100 Mbps */ +#define PC_REP_RES 0x0004 +#define PC_BIT14 0x0002 /* ??? */ +#define PC_BIT15 0x0001 /* ??? ENDSL ?? */ + +/* ------------------------------------------------------------------------- */ + +static ulong board_init (void) +{ + volatile immap_t *immr = (immap_t *) CFG_IMMR; + ulong reg, revision, speed = 100; + int ethspeed; + char *s; + + if ((s = getenv ("ethspeed")) != NULL) { + if (strcmp (s, "100") == 0) { + ethspeed = 100; + } else if (strcmp (s, "10") == 0) { + ethspeed = 10; + } else { + ethspeed = 0; + } + } else { + ethspeed = 0; + } + + /* Configure Port B Output Pins => 0x0003cc3F */ + reg = PB_LED_ALL | PC_REP_SPD1 | PC_REP_SPD0 | PB_RESET_2081 | + PB_MAI_ALL; + immr->im_cpm.cp_pbpar &= ~reg; + immr->im_cpm.cp_pbodr &= ~reg; + immr->im_cpm.cp_pbdat &= ~reg; /* all 0 */ + immr->im_cpm.cp_pbdir |= reg; + + /* Check hardware revision */ + if ((immr->im_ioport.iop_pcdat & 0x0003) == 0x0003) { + /* + * Revision 3.x hardware + */ + revision = 3; + + immr->im_ioport.iop_pcdat = 0x0240; + immr->im_ioport.iop_pcdir = (PC_REP_MGRPRS | PC_REP_SPD | PC_REP_RES | PC_BIT14); /* = 0x0246 */ + immr->im_ioport.iop_pcdat |= PC_REP_RES; + } else { + immr->im_ioport.iop_pcdat = 0x0002; + immr->im_ioport.iop_pcdir = (PC_REP_MGRPRS | PC_REP_RES | PC_BIT14 | PC_BIT15); /* = 0x0207 */ + + if ((immr->im_ioport.iop_pcdat & PC_REP_SPD) == 0) { + /* + * Revision 2.x hardware: PC9 connected to PB21 + */ + revision = 2; + + if (ethspeed == 0) { + /* both 10 and 100 Mbps allowed: + * select 10 Mbps and autonegotiation + */ + puts (" [10+100]"); + immr->im_cpm.cp_pbdat = 0; /* SPD1:SPD0 = 0:0 - autonegot. */ + speed = 10; + } else if (ethspeed == 10) { + /* we are asked for 10 Mbps, + * so select 10 Mbps + */ + puts (" [10]"); + immr->im_cpm.cp_pbdat = 0; /* ??? */ + speed = 10; + } else { + /* anything else: + * select 100 Mbps + */ + puts (" [100]"); + immr->im_cpm.cp_pbdat = PC_REP_SPD0 | PC_REP_SPD1; + /* SPD1:SPD0 = 1:1 - 100 Mbps */ + speed = 100; + } + immr->im_ioport.iop_pcdat |= (PC_REP_RES | PC_BIT14); + + /* must be run from RAM */ + /* start_lxt980 (speed); */ + /*************************/ + } else { + /* + * Revision 1.x hardware + */ + revision = 1; + + immr->im_ioport.iop_pcdat = PC_REP_MGRPRS | PC_BIT14; /* = 0x0202 */ + immr->im_ioport.iop_pcdir = (PC_REP_MGRPRS | PC_REP_SPD | PC_REP_RES | PC_BIT14 | PC_BIT15); /* = 0x0247 */ + + if (ethspeed == 0) { + /* both 10 and 100 Mbps allowed: + * select 100 Mbps and autonegotiation + */ + puts (" [10+100]"); + immr->im_cpm.cp_pbdat = 0; /* SPD1:SPD0 = 0:0 - autonegot. */ + immr->im_ioport.iop_pcdat |= PC_REP_SPD; + } else if (ethspeed == 10) { + /* we are asked for 10 Mbps, + * so select 10 Mbps + */ + puts (" [10]"); + immr->im_cpm.cp_pbdat = PC_REP_SPD0; /* SPD1:SPD0 = 0:1 - 10 Mbps */ + } else { + /* anything else: + * select 100 Mbps + */ + puts (" [100]"); + immr->im_cpm.cp_pbdat = PC_REP_SPD0 | PC_REP_SPD1; + /* SPD1:SPD0 = 1:1 - 100 Mbps */ + immr->im_ioport.iop_pcdat |= PC_REP_SPD; + } + + immr->im_ioport.iop_pcdat |= PC_REP_RES; + } + } + SHOW_BOOT_PROGRESS (0x00); + + return ((revision << 16) | (speed & 0xFFFF)); +} + +/* ------------------------------------------------------------------------- */ + +#define SCC_SM 1 /* Index => SCC2 */ +#define PROFF PROFF_SCC2 + +#define SMI_MSGLEN 8 /* Length of SMI Messages */ + +#define PHYGPCR_ADDR 0x109 /* Port Enable */ +#define PHYPCR_ADDR 0x132 /* PHY Port Control Reg. (port 1) */ +#define LEDPCR_ADDR 0x141 /* LED Port Control Reg. */ +#define RPRESET_ADDR 0x144 /* Repeater Reset */ + +#define PHYPCR_SPEED 0x2000 /* on for 100 Mbps, off for 10 Mbps */ +#define PHYPCR_AN 0x1000 /* on to enable Auto-Negotiation */ +#define PHYPCR_REST_AN 0x0200 /* on to restart Auto-Negotiation */ +#define PHYPCR_FDX 0x0100 /* on for Full Duplex, off for HDX */ +#define PHYPCR_COLT 0x0080 /* on to enable COL signal test */ + +/* ------------------------------------------------------------------------- */ + +/* + * Must run from RAM: + * uses parameter RAM area which is used for stack while running from ROM + */ +void hermes_start_lxt980 (int speed) +{ + volatile immap_t *immr = (immap_t *) CFG_IMMR; + volatile cpm8xx_t *cp = (cpm8xx_t *) & (immr->im_cpm); + volatile scc_t *sp = (scc_t *) & (cp->cp_scc[SCC_SM]); + volatile cbd_t *bd; + volatile hdlc_pram_t *hp; + uchar smimsg[SMI_MSGLEN]; + ushort phypcrval; + uint bd_off; + int pnr; + + printf ("LXT9880: %3d Mbps\n", speed); + + immr->im_ioport.iop_paodr |= 0x0008; /* init PAODR: PA12 (TXD2) open drain */ + immr->im_ioport.iop_papar |= 0x400c; /* init PAPAR: TXD2, RXD2, BRGO4 */ + immr->im_ioport.iop_padir &= 0xbff3; /* init PADIR: BRGO4 */ + immr->im_ioport.iop_padir |= 0x4000; + + /* get temporary BD; no need for permanent alloc */ + bd_off = dpram_base_align (8); + + bd = (cbd_t *) (immr->im_cpm.cp_dpmem + bd_off); + + bd->cbd_bufaddr = 0; + bd->cbd_datlen = 0; + bd->cbd_sc = BD_SC_WRAP | BD_SC_LAST | BD_SC_INTRPT | BD_SC_TC; + + /* init. baudrate generator BRG4 */ + cp->cp_brgc4 = (0x00010000 | (50 << 1)); /* output 1 MHz */ + + cp->cp_sicr &= 0xFFFF00FF; /* SICR: mask SCC2 */ + cp->cp_sicr |= 0x00001B00; /* SICR: SCC2 clk BRG4 */ + + /* init SCC_SM register */ + sp->scc_psmr = 0x0000; /* init PSMR: no additional flags */ + sp->scc_todr = 0x0000; + sp->scc_dsr = 0x7e7e; + + /* init. SCC_SM parameter area */ + hp = (hdlc_pram_t *) & cp->cp_dparam[PROFF]; + + hp->tbase = bd_off; /* offset from beginning of DPRAM */ + + hp->rfcr = 0x18; + hp->tfcr = 0x18; + hp->mrblr = 10; + + hp->c_mask = 0x0000f0b8; + hp->c_pres = 0x0000ffff; + + hp->disfc = 0; + hp->crcec = 0; + hp->abtsc = 0; + hp->nmarc = 0; + hp->retrc = 0; + + hp->mflr = 10; + + hp->rfthr = 1; + + hp->hmask = 0; + hp->haddr1 = 0; + hp->haddr2 = 0; + hp->haddr3 = 0; + hp->haddr4 = 0; + + cp->cp_cpcr = SCC_SM << 6 | 0x0001; /* SCC_SM: init TX/RX params */ + while (cp->cp_cpcr & CPM_CR_FLG); + + /* clear all outstanding SCC events */ + sp->scc_scce = ~0; + + /* enable transmitter: GSMR_L: TPL=2(16bits), TPP=3(all ones), ENT */ + sp->scc_gsmrh = 0; + sp->scc_gsmrl |= SCC_GSMRL_TPL_16 | SCC_GSMRL_TPP_ALL1 | + SCC_GSMRL_ENT | SCC_GSMRL_MODE_HDLC; + +#if 0 + smimsg[0] = 0x00; /* CHIP/HUB ID */ + smimsg[1] = 0x38; /* WRITE CMD */ + smimsg[2] = (RPRESET_ADDR << 4) & 0xf0; + smimsg[3] = RPRESET_ADDR >> 4; + smimsg[4] = 0x01; + smimsg[5] = 0x00; + smimsg[6] = 0x00; + smimsg[7] = 0x00; + + send_smi_frame (sp, bd, smimsg); +#endif + + smimsg[0] = 0x7f; /* BROADCAST */ + smimsg[1] = 0x34; /* ASSIGN HUB ID */ + smimsg[2] = 0x00; + smimsg[3] = 0x00; + smimsg[4] = 0x00; /* HUB ID = 0 */ + smimsg[5] = 0x00; + smimsg[6] = 0x00; + smimsg[7] = 0x00; + + send_smi_frame (sp, bd, smimsg); + + smimsg[0] = 0x7f; /* BROADCAST */ + smimsg[1] = 0x3c; /* SET ARBOUT TO 0 */ + smimsg[2] = 0x00; /* ADDRESS = 0 */ + smimsg[3] = 0x00; + smimsg[4] = 0x00; /* DATA = 0 */ + smimsg[5] = 0x00; + smimsg[6] = 0x00; + smimsg[7] = 0x00; + + send_smi_frame (sp, bd, smimsg); + + if (speed == 100) { + phypcrval = PHYPCR_SPEED; /* 100 MBIT, disable autoneg. */ + } else { + phypcrval = 0; /* 10 MBIT, disable autoneg. */ + } + + /* send MSGs */ + for (pnr = 0; pnr < 8; pnr++) { + smimsg[0] = 0x00; /* CHIP/HUB ID */ + smimsg[1] = 0x38; /* WRITE CMD */ + smimsg[2] = ((PHYPCR_ADDR + pnr) << 4) & 0xf0; + smimsg[3] = (PHYPCR_ADDR + pnr) >> 4; + smimsg[4] = (unsigned char) (phypcrval & 0xff); + smimsg[5] = (unsigned char) (phypcrval >> 8); + smimsg[6] = 0x00; + smimsg[7] = 0x00; + + send_smi_frame (sp, bd, smimsg); + } + + smimsg[0] = 0x00; /* CHIP/HUB ID */ + smimsg[1] = 0x38; /* WRITE CMD */ + smimsg[2] = (PHYGPCR_ADDR << 4) & 0xf0; + smimsg[3] = PHYGPCR_ADDR >> 4; + smimsg[4] = 0xff; /* enable port 1-8 */ + smimsg[5] = 0x01; /* enable MII1 (0x01) */ + smimsg[6] = 0x00; + smimsg[7] = 0x00; + + send_smi_frame (sp, bd, smimsg); + + smimsg[0] = 0x00; /* CHIP/HUB ID */ + smimsg[1] = 0x38; /* WRITE CMD */ + smimsg[2] = (LEDPCR_ADDR << 4) & 0xf0; + smimsg[3] = LEDPCR_ADDR >> 4; + smimsg[4] = 0xaa; /* Port 1-8 Conf.bits = 10 (Hardware control) */ + smimsg[5] = 0xaa; + smimsg[6] = 0x00; + smimsg[7] = 0x00; + + send_smi_frame (sp, bd, smimsg); + + /* + * Disable Transmitter (so that we can free the BD, too) + */ + sp->scc_gsmrl &= ~SCC_GSMRL_ENT; +} + +/* ------------------------------------------------------------------------- */ + +static void send_smi_frame (volatile scc_t * sp, volatile cbd_t * bd, + uchar * msg) +{ +#ifdef DEBUG + unsigned hub, chip, cmd, length, addr; + + hub = msg[0] & 0x1F; + chip = msg[0] >> 5; + cmd = msg[1] & 0x1F; + length = (msg[1] >> 5) | ((msg[2] & 0x0F) << 3); + addr = (msg[2] >> 4) | (msg[3] << 4); + + printf ("SMI send: Hub %02x Chip %x Cmd %02x Len %d Addr %03x: " + "%02x %02x %02x %02x\n", + hub, chip, cmd, length, addr, msg[4], msg[5], msg[6], msg[7]); +#endif /* DEBUG */ + + bd->cbd_bufaddr = (uint) msg; + bd->cbd_datlen = SMI_MSGLEN; + bd->cbd_sc |= BD_SC_READY; + + /* wait for msg transmitted */ + while ((sp->scc_scce & 0x0002) == 0); + /* clear all events */ + sp->scc_scce = ~0; +} + +/* ------------------------------------------------------------------------- */ + +void show_boot_progress (int status) +{ + volatile immap_t *immr = (immap_t *) CFG_IMMR; + + status ^= 0x0F; + status = (status & 0x0F) << 14; + immr->im_cpm.cp_pbdat = (immr->im_cpm.cp_pbdat & ~PB_LED_ALL) | status; +} + +/* ------------------------------------------------------------------------- */ |