3 * Pierre AUBERT, Staubli Faverges, <p.aubert@staubli.com>
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
23 * Init is derived from Linux code.
30 #define CALC_TIMING(t) (t + period - 1) / period
32 #ifdef CONFIG_IDE_RESET
33 extern void init_ide_reset (void);
36 int ide_preinit (void)
38 DECLARE_GLOBAL_DATA_PTR;
39 long period, t0, t1, t2_8, t2_16, t4, ta;
41 struct mpc5xxx_sdma *psdma = (struct mpc5xxx_sdma *) MPC5XXX_SDMA;
43 reg = *(vu_long *) MPC5XXX_GPS_PORT_CONFIG;
44 #if defined(CONFIG_TOTAL5200)
45 /* ATA cs0/1 on i2c2 clk/io */
46 reg = (reg & ~0x03000000ul) | 0x02000000ul;
48 /* ATA cs0/1 on Local Plus cs4/5 */
49 reg = (reg & ~0x03000000ul) | 0x01000000ul;
50 #endif /* CONFIG_TOTAL5200 */
51 *(vu_long *) MPC5XXX_GPS_PORT_CONFIG = reg;
53 /* All sample codes do that... */
54 *(vu_long *) MPC5XXX_ATA_SHARE_COUNT = 0;
56 /* Configure and reset host */
57 *(vu_long *) MPC5XXX_ATA_HOST_CONFIG = MPC5xxx_ATA_HOSTCONF_IORDY |
58 MPC5xxx_ATA_HOSTCONF_SMR | MPC5xxx_ATA_HOSTCONF_FR;
60 *(vu_long *) MPC5XXX_ATA_HOST_CONFIG = MPC5xxx_ATA_HOSTCONF_IORDY;
62 /* Disable prefetch on Commbus */
65 /* Init timings : we use PIO mode 0 timings */
66 period = 1000000000 / gd->ipb_clk; /* period in ns */
68 t0 = CALC_TIMING (600);
69 t2_8 = CALC_TIMING (290);
70 t2_16 = CALC_TIMING (165);
71 reg = (t0 << 24) | (t2_8 << 16) | (t2_16 << 8);
72 *(vu_long *) MPC5XXX_ATA_PIO1 = reg;
74 t4 = CALC_TIMING (30);
75 t1 = CALC_TIMING (70);
76 ta = CALC_TIMING (35);
77 reg = (t4 << 24) | (t1 << 16) | (ta << 8);
79 *(vu_long *) MPC5XXX_ATA_PIO2 = reg;
81 #ifdef CONFIG_IDE_RESET
83 #endif /* CONFIG_IDE_RESET */
87 #endif /* CFG_CMD_IDE */