Mercurial > flash_v2
diff packages/devs/eth/powerpc/adder/current/src/adder_eth.c @ 432:cc4df9225149
Add Adder platform from Analogue & Micro
| author | gthomas |
|---|---|
| date | Mon, 25 Nov 2002 23:18:41 +0000 |
| parents | |
| children |
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new file mode 100644 --- /dev/null +++ b/packages/devs/eth/powerpc/adder/current/src/adder_eth.c @@ -0,0 +1,279 @@ +//========================================================================== +// +// adder_eth.c +// +// Ethernet device driver specifics for Analogue & Micro Adder (PPC850) +// +//========================================================================== +//####ECOSGPLCOPYRIGHTBEGIN#### +// ------------------------------------------- +// This file is part of eCos, the Embedded Configurable Operating System. +// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. +// Copyright (C) 2002 Gary Thomas +// +// eCos 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 or (at your option) any later version. +// +// eCos 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 eCos; if not, write to the Free Software Foundation, Inc., +// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. +// +// As a special exception, if other files instantiate templates or use macros +// or inline functions from this file, or you compile this file and link it +// with other works to produce a work based on this file, this file does not +// by itself cause the resulting work to be covered by the GNU General Public +// License. However the source code for this file must still be made available +// in accordance with section (3) of the GNU General Public License. +// +// This exception does not invalidate any other reasons why a work based on +// this file might be covered by the GNU General Public License. +// +// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. +// at http://sources.redhat.com/ecos/ecos-license/ +// ------------------------------------------- +//####ECOSGPLCOPYRIGHTEND#### +//####BSDCOPYRIGHTBEGIN#### +// +// ------------------------------------------- +// +// Portions of this software may have been derived from OpenBSD or other sources, +// and are covered by the appropriate copyright disclaimers included herein. +// +// ------------------------------------------- +// +//####BSDCOPYRIGHTEND#### +//========================================================================== +//#####DESCRIPTIONBEGIN#### +// +// Author(s): gthomas +// Contributors: gthomas +// Date: 2002-11-25 +// Purpose: +// Description: platform driver specifics for A&M Adder +// +// +//####DESCRIPTIONEND#### +// +//========================================================================== + +// Ethernet device driver support for PHY on Adder/MPC850 + +#include <pkgconf/system.h> +#include <cyg/infra/cyg_type.h> +#include <cyg/infra/diag.h> + +#include <cyg/hal/hal_arch.h> +#include <cyg/hal/hal_cache.h> +#include <cyg/hal/hal_if.h> +#include <cyg/hal/drv_api.h> + +#include CYGDAT_DEVS_QUICC_ETH_INL // Platform specifics +#include <cyg/hal/quicc/ppc8xx.h> // QUICC structure definitions + +// MII interface +#define MII_Start 0x40000000 +#define MII_Read 0x20000000 +#define MII_Write 0x10000000 +#define MII_Cmd 0x30000000 +#define MII_Phy(phy) (phy << 23) +#define MII_Reg(reg) (reg << 18) +#define MII_TA 0x00020000 + +// Transceiver mode +#define PHY_BMCR 0x00 // Register number +#define PHY_BMCR_RESET 0x8000 +#define PHY_BMCR_LOOPBACK 0x4000 +#define PHY_BMCR_100MB 0x2000 +#define PHY_BMCR_AUTO_NEG 0x1000 +#define PHY_BMCR_POWER_DOWN 0x0800 +#define PHY_BMCR_ISOLATE 0x0400 +#define PHY_BMCR_RESTART 0x0200 +#define PHY_BMCR_FULL_DUPLEX 0x0100 +#define PHY_BMCR_COLL_TEST 0x0080 + +#define PHY_BMSR 0x01 // Status register +#define PHY_BMSR_AUTO_NEG 0x0020 +#define PHY_BMSR_LINK 0x0004 + +// Bits in port D - used for 2 wire MII interface +#define MII_DATA 0x1000 +#define MII_CLOCK 0x0800 + +#define MII_SET_DATA(val) \ + if (val) { \ + eppc->pio_pddat |= MII_DATA; \ + } else { \ + eppc->pio_pddat &= ~MII_DATA; \ + } + +#define MII_GET_DATA() \ + ((eppc->pio_pddat & MII_DATA) != 0) + +#define MII_SET_CLOCK(val) \ + if (val) { \ + eppc->pio_pddat |= MII_CLOCK; \ + } else { \ + eppc->pio_pddat &= ~MII_CLOCK; \ + } + +static cyg_uint32 +phy_cmd(cyg_uint32 cmd) +{ + volatile EPPC *eppc = (volatile EPPC *)eppc_base(); + cyg_uint32 retval; + int i, off; + bool is_read = ((cmd & MII_Cmd) == MII_Read); + + // Set both bits as output + eppc->pio_pddir |= MII_DATA | MII_CLOCK; + + // Preamble + for (i = 0; i < 32; i++) { + MII_SET_CLOCK(0); + MII_SET_DATA(1); + CYGACC_CALL_IF_DELAY_US(1); + MII_SET_CLOCK(1); + CYGACC_CALL_IF_DELAY_US(1); + } + + // Command/data + for (i = 0, off = 31; i < (is_read ? 14 : 32); i++, --off) { + MII_SET_CLOCK(0); + MII_SET_DATA((cmd >> off) & 0x00000001); + CYGACC_CALL_IF_DELAY_US(1); + MII_SET_CLOCK(1); + CYGACC_CALL_IF_DELAY_US(1); + } + + retval = cmd; + + // If read, fetch data register + if (is_read) { + retval >>= 16; + + MII_SET_CLOCK(0); + eppc->pio_pddir &= ~MII_DATA; // Data bit is now input + CYGACC_CALL_IF_DELAY_US(1); + MII_SET_CLOCK(1); + CYGACC_CALL_IF_DELAY_US(1); + MII_SET_CLOCK(0); + CYGACC_CALL_IF_DELAY_US(1); + + for (i = 0, off = 15; i < 16; i++, off--) { + MII_SET_CLOCK(1); + retval <<= 1; + retval |= MII_GET_DATA(); + CYGACC_CALL_IF_DELAY_US(1); + MII_SET_CLOCK(0); + CYGACC_CALL_IF_DELAY_US(1); + } + } + + // Set both bits as output + eppc->pio_pddir |= MII_DATA | MII_CLOCK; + + // Postamble + for (i = 0; i < 32; i++) { + MII_SET_CLOCK(0); + MII_SET_DATA(1); + CYGACC_CALL_IF_DELAY_US(1); + MII_SET_CLOCK(1); + CYGACC_CALL_IF_DELAY_US(1); + } + + return retval; +} + +// +// PHY unit access (via MII channel) +// +static void +phy_write(int reg, int addr, unsigned short data) +{ + phy_cmd(MII_Start | MII_Write | MII_Phy(addr) | MII_Reg(reg) | MII_TA | data); +} + +static bool +phy_read(int reg, int addr, unsigned short *val) +{ + cyg_uint32 ret; + + ret = phy_cmd(MII_Start | MII_Read | MII_Phy(addr) | MII_Reg(reg) | MII_TA); + *val = ret; + return true; +} + +bool +_adder_reset_phy(void) +{ + volatile EPPC *eppc = (volatile EPPC *)eppc_base(); + int phy_timeout = 5*1000; // Wait 5 seconds max for link to clear + bool phy_ok; + unsigned short phy_state = 0; + int phy_unit = -1; + int i; + + // Reset PHY (transceiver) + eppc->pip_pbdat &= ~0x00004000; // Reset PHY chip + CYGACC_CALL_IF_DELAY_US(15000); // > 10ms + eppc->pip_pbdat |= 0x00004000; // Enable PHY chip + + phy_ok = false; + + // Try and discover how this PHY is wired + for (i = 0; i < 0x20; i++) { + phy_read(PHY_BMCR, i, &phy_state); + if ((phy_state & PHY_BMCR_RESET) == 0) { + phy_unit = i; + break; + } + } + if (phy_unit < 0) { + diag_printf("QUICC ETH - Can't locate PHY\n"); + return false; + } else { +#if 0 + diag_printf("QUICC ETH - using PHY %d\n", phy_unit); +#endif + } + if (phy_read(PHY_BMSR, phy_unit, &phy_state)) { + if ((phy_state & PHY_BMSR_LINK) != PHY_BMSR_LINK) { + unsigned short reset_mode; + phy_write(PHY_BMCR, phy_unit, PHY_BMCR_RESET); + for (i = 0; i < 10; i++) { + phy_ok = phy_read(PHY_BMCR, phy_unit, &phy_state); + if (!phy_ok) break; + if (!(phy_state & PHY_BMCR_RESET)) break; + } + if (!phy_ok || (phy_state & PHY_BMCR_RESET)) { + diag_printf("QUICC/ETH: Can't get PHY unit to soft reset: %x\n", phy_state); + return false; + } + reset_mode = PHY_BMCR_RESTART | PHY_BMCR_AUTO_NEG | PHY_BMCR_FULL_DUPLEX; + phy_write(PHY_BMCR, phy_unit, reset_mode); + while (phy_timeout-- >= 0) { + phy_ok = phy_read(PHY_BMSR, phy_unit, &phy_state); + if (phy_ok && (phy_state & PHY_BMSR_LINK)) { + break; + } else { + CYGACC_CALL_IF_DELAY_US(10000); // 10ms + } + } + if (phy_timeout <= 0) { + diag_printf("** QUICC/ETH Warning: PHY LINK UP failed\n"); + } + } + else { + diag_printf("** QUICC/ETH Info: PHY LINK already UP \n"); + } + } + + return phy_ok; +} +
