| wdenk | 132ba5f | 2004-02-27 08:20:54 +0000 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2004 |
| 3 | * Pierre AUBERT, Staubli Faverges, <p.aubert@staubli.com> |
| 4 | * |
| 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of |
| 11 | * the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 21 | * MA 02111-1307 USA |
| 22 | * |
| 23 | * Init is derived from Linux code. |
| 24 | */ |
| 25 | #include <common.h> |
| 26 | |
| 27 | #ifdef CFG_CMD_IDE |
| 28 | #include <mpc5xxx.h> |
| 29 | |
| 30 | #define CALC_TIMING(t) (t + period - 1) / period |
| 31 | |
| wdenk | c3f9d49 | 2004-03-14 00:59:59 +0000 | [diff] [blame^] | 32 | #ifdef CONFIG_IDE_RESET |
| 33 | extern void init_ide_reset (void); |
| 34 | #endif |
| wdenk | 132ba5f | 2004-02-27 08:20:54 +0000 | [diff] [blame] | 35 | |
| 36 | int ide_preinit (void) |
| 37 | { |
| 38 | DECLARE_GLOBAL_DATA_PTR; |
| 39 | long period, t0, t1, t2_8, t2_16, t4, ta; |
| 40 | vu_long reg; |
| 41 | struct mpc5xxx_sdma *psdma = (struct mpc5xxx_sdma *) MPC5XXX_SDMA; |
| 42 | |
| 43 | reg = *(vu_long *) MPC5XXX_GPS_PORT_CONFIG; |
| 44 | reg = (reg & ~0x03000000ul) | 0x01000000ul; |
| 45 | *(vu_long *) MPC5XXX_GPS_PORT_CONFIG = reg; |
| 46 | |
| 47 | /* All sample codes do that... */ |
| 48 | *(vu_long *) MPC5XXX_ATA_SHARE_COUNT = 0; |
| 49 | |
| 50 | /* Configure and reset host */ |
| 51 | *(vu_long *) MPC5XXX_ATA_HOST_CONFIG = MPC5xxx_ATA_HOSTCONF_IORDY | |
| 52 | MPC5xxx_ATA_HOSTCONF_SMR | MPC5xxx_ATA_HOSTCONF_FR; |
| 53 | udelay (10); |
| 54 | *(vu_long *) MPC5XXX_ATA_HOST_CONFIG = MPC5xxx_ATA_HOSTCONF_IORDY; |
| 55 | |
| 56 | /* Disable prefetch on Commbus */ |
| 57 | psdma->PtdCntrl |= 1; |
| 58 | |
| 59 | /* Init timings : we use PIO mode 0 timings */ |
| 60 | period = 1000000000 / gd->ipb_clk; /* period in ns */ |
| 61 | |
| 62 | t0 = CALC_TIMING (600); |
| 63 | t2_8 = CALC_TIMING (290); |
| 64 | t2_16 = CALC_TIMING (165); |
| 65 | reg = (t0 << 24) | (t2_8 << 16) | (t2_16 << 8); |
| 66 | *(vu_long *) MPC5XXX_ATA_PIO1 = reg; |
| 67 | |
| 68 | t4 = CALC_TIMING (30); |
| 69 | t1 = CALC_TIMING (70); |
| 70 | ta = CALC_TIMING (35); |
| 71 | reg = (t4 << 24) | (t1 << 16) | (ta << 8); |
| 72 | |
| 73 | *(vu_long *) MPC5XXX_ATA_PIO2 = reg; |
| 74 | |
| wdenk | c3f9d49 | 2004-03-14 00:59:59 +0000 | [diff] [blame^] | 75 | #ifdef CONFIG_IDE_RESET |
| 76 | init_ide_reset (); |
| 77 | #endif /* CONFIG_IDE_RESET */ |
| wdenk | 132ba5f | 2004-02-27 08:20:54 +0000 | [diff] [blame] | 78 | |
| 79 | return (0); |
| 80 | } |
| wdenk | 132ba5f | 2004-02-27 08:20:54 +0000 | [diff] [blame] | 81 | #endif /* CFG_CMD_IDE */ |