diff options
Diffstat (limited to 'cpu/mpc5xxx/ide.c')
| -rw-r--r-- | cpu/mpc5xxx/ide.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/cpu/mpc5xxx/ide.c b/cpu/mpc5xxx/ide.c new file mode 100644 index 0000000..05eb8bc --- /dev/null +++ b/cpu/mpc5xxx/ide.c @@ -0,0 +1,93 @@ +/* + * (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> + +#ifdef CFG_CMD_IDE +#include <mpc5xxx.h> + +#define CALC_TIMING(t) (t + period - 1) / period + +#define GPIO_PSC1_4 0x01000000ul + +int ide_preinit (void) +{ + DECLARE_GLOBAL_DATA_PTR; + 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; + reg = (reg & ~0x03000000ul) | 0x01000000ul; + *(vu_long *) MPC5XXX_GPS_PORT_CONFIG = reg; + + /* All sample codes do that... */ + *(vu_long *) MPC5XXX_ATA_SHARE_COUNT = 0; + + /* 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; + + /* 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; + +#if defined (CONFIG_ICECUBE) && defined (CONFIG_IDE_RESET) + /* Configure PSC1_4 as GPIO output for ATA reset */ + *(vu_long *) MPC5XXX_WU_GPIO_DATA |= GPIO_PSC1_4; + *(vu_long *) MPC5XXX_WU_GPIO_ENABLE |= GPIO_PSC1_4; + *(vu_long *) MPC5XXX_WU_GPIO_DIR |= GPIO_PSC1_4; +#endif /* defined (CONFIG_ICECUBE) && defined (CONFIG_IDE_RESET) */ + + return (0); +} + +#if defined (CONFIG_ICECUBE) && defined (CONFIG_IDE_RESET) +void ide_set_reset (int idereset) +{ + if (idereset) { + *(vu_long *) MPC5XXX_WU_GPIO_DATA &= ~GPIO_PSC1_4; + } else { + *(vu_long *) MPC5XXX_WU_GPIO_DATA |= GPIO_PSC1_4; + } +} +#endif /* defined (CONFIG_ICECUBE) && defined (CONFIG_IDE_RESET) */ +#endif /* CFG_CMD_IDE */ |