/* * (C) Copyright 2004 * Pierre AUBERT, Staubli Faverges, <p.aubert@staubli.com> * * 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 * * Init is derived from Linux code. */ #include <common.h> #if defined(CONFIG_CMD_IDE) #include <mpc5xxx.h> DECLARE_GLOBAL_DATA_PTR; #define CALC_TIMING(t) (t + period - 1) / period #ifdef CONFIG_IDE_RESET extern void init_ide_reset (void); #endif int ide_preinit (void) { long period, t0, t1, t2_8, t2_16, t4, ta; vu_long reg; struct mpc5xxx_sdma *psdma = (struct mpc5xxx_sdma *) MPC5XXX_SDMA; reg = *(vu_long *) MPC5XXX_GPS_PORT_CONFIG; #if defined(CONFIG_SYS_ATA_CS_ON_I2C2) /* ATA cs0/1 on i2c2 clk/io */ reg = (reg & ~0x03000000ul) | 0x02000000ul; #elif defined(CONFIG_SYS_ATA_CS_ON_TIMER01) /* ATA cs0/1 on Timer 0/1 */ reg = (reg & ~0x03000000ul) | 0x03000000ul; #else /* ATA cs0/1 on Local Plus cs4/5 */ reg = (reg & ~0x03000000ul) | 0x01000000ul; #endif /* CONFIG_TOTAL5200 */ *(vu_long *) MPC5XXX_GPS_PORT_CONFIG = reg; /* All sample codes do that... */ *(vu_long *) MPC5XXX_ATA_SHARE_COUNT = 0; #if defined(CONFIG_UC101) /* Configure and reset host */ *(vu_long *) MPC5XXX_ATA_HOST_CONFIG = MPC5xxx_ATA_HOSTCONF_SMR | MPC5xxx_ATA_HOSTCONF_FR; udelay (10); *(vu_long *) MPC5XXX_ATA_HOST_CONFIG = 0; #else /* Configure and reset host */ *(vu_long *) MPC5XXX_ATA_HOST_CONFIG = MPC5xxx_ATA_HOSTCONF_IORDY | MPC5xxx_ATA_HOSTCONF_SMR | MPC5xxx_ATA_HOSTCONF_FR; udelay (10); *(vu_long *) MPC5XXX_ATA_HOST_CONFIG = MPC5xxx_ATA_HOSTCONF_IORDY; #endif /* Disable prefetch on Commbus */ psdma->PtdCntrl |= 1; /* Init timings : we use PIO mode 0 timings */ period = 1000000000 / gd->ipb_clk; /* period in ns */ t0 = CALC_TIMING (600); t2_8 = CALC_TIMING (290); t2_16 = CALC_TIMING (165); reg = (t0 << 24) | (t2_8 << 16) | (t2_16 << 8); *(vu_long *) MPC5XXX_ATA_PIO1 = reg; t4 = CALC_TIMING (30); t1 = CALC_TIMING (70); ta = CALC_TIMING (35); reg = (t4 << 24) | (t1 << 16) | (ta << 8); *(vu_long *) MPC5XXX_ATA_PIO2 = reg; #ifdef CONFIG_IDE_RESET init_ide_reset (); #endif /* CONFIG_IDE_RESET */ return (0); } #endif