/* * (C) Copyright 2007-2009 DENX Software Engineering * * 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 * */ #include <common.h> #include <command.h> #include <asm/io.h> #include <asm/processor.h> DECLARE_GLOBAL_DATA_PTR; #if defined(CONFIG_IDE_RESET) void ide_set_reset (int idereset) { volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; debug ("ide_set_reset(%d)\n", idereset); if (idereset) { out_be32(&im->pata.pata_ata_control, 0); } else { out_be32(&im->pata.pata_ata_control, FSL_ATA_CTRL_ATA_RST_B); } udelay(100); } void init_ide_reset (void) { debug ("init_ide_reset\n"); /* * Clear the reset bit to reset the interface * cf. RefMan MPC5121EE: 28.4.1 Resetting the ATA Bus */ ide_set_reset(1); /* Assert the reset bit to enable the interface */ ide_set_reset(0); } #define CALC_TIMING(t) (t + period - 1) / period int ide_preinit (void) { volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; long t; const struct { short t0; short t1; short t2_8; short t2_16; short t2i; short t4; short t9; short tA; } pio_specs = { .t0 = 600, .t1 = 70, .t2_8 = 290, .t2_16 = 165, .t2i = 0, .t4 = 30, .t9 = 20, .tA = 50, }; union { u32 config; struct { u8 field1; u8 field2; u8 field3; u8 field4; }bytes; } cfg; debug ("IDE preinit using PATA peripheral at IMMR-ADDR %08x\n", (u32)&im->pata); /* Set the reset bit to 1 to enable the interface */ ide_set_reset(0); /* Init timings : we use PIO mode 0 timings */ t = 1000000000 / gd->ips_clk; /* period in ns */ cfg.bytes.field1 = 3; cfg.bytes.field2 = 3; cfg.bytes.field3 = (pio_specs.t1 + t) / t; cfg.bytes.field4 = (pio_specs.t2_8 + t) / t; out_be32(&im->pata.pata_time1, cfg.config); cfg.bytes.field1 = (pio_specs.t2_8 + t) / t; cfg.bytes.field2 = (pio_specs.tA + t) / t + 2; cfg.bytes.field3 = 1; cfg.bytes.field4 = (pio_specs.t4 + t) / t; out_be32(&im->pata.pata_time2, cfg.config); cfg.config = in_be32(&im->pata.pata_time3); cfg.bytes.field1 = (pio_specs.t9 + t) / t; out_be32(&im->pata.pata_time3, cfg.config); debug ("PATA preinit complete.\n"); return 0; } #endif /* defined(CONFIG_IDE_RESET) */