2 * (C) Copyright 2007-2009 DENX Software Engineering
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #include <asm/processor.h>
28 DECLARE_GLOBAL_DATA_PTR;
30 #if defined(CONFIG_IDE_RESET)
32 void init_ide_reset (void)
34 volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
35 debug ("init_ide_reset\n");
38 * Clear the reset bit to reset the interface
39 * cf. RefMan MPC5121EE: 28.4.1 Resetting the ATA Bus
41 immr->pata.pata_ata_control = 0;
43 /* Assert the reset bit to enable the interface */
44 immr->pata.pata_ata_control = FSL_ATA_CTRL_ATA_RST_B;
48 void ide_set_reset (int idereset)
50 volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
51 debug ("ide_set_reset(%d)\n", idereset);
54 immr->pata.pata_ata_control = 0;
57 immr->pata.pata_ata_control = FSL_ATA_CTRL_ATA_RST_B;
62 #define CALC_TIMING(t) (t + period - 1) / period
64 int ide_preinit (void)
66 volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
97 debug ("IDE preinit using PATA peripheral at IMMR-ADDR %08x\n",
100 /* Set the reset bit to 1 to enable the interface */
101 immr->pata.pata_ata_control = FSL_ATA_CTRL_ATA_RST_B;
103 /* Init timings : we use PIO mode 0 timings */
104 t = 1000000000 / gd->ips_clk; /* period in ns */
105 cfg.bytes.field1 = 3;
106 cfg.bytes.field2 = 3;
107 cfg.bytes.field3 = (pio_specs.t1 + t) / t;
108 cfg.bytes.field4 = (pio_specs.t2_8 + t) / t;
110 immr->pata.pata_time1 = cfg.config;
112 cfg.bytes.field1 = (pio_specs.t2_8 + t) / t;
113 cfg.bytes.field2 = (pio_specs.tA + t) / t + 2;
114 cfg.bytes.field3 = 1;
115 cfg.bytes.field4 = (pio_specs.t4 + t) / t;
117 immr->pata.pata_time2 = cfg.config;
119 cfg.config = immr->pata.pata_time3;
120 cfg.bytes.field1 = (pio_specs.t9 + t) / t;
122 immr->pata.pata_time3 = cfg.config;
123 debug ("PATA preinit complete.\n");
128 #endif /* defined(CONFIG_IDE_RESET) */