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- /*
- * (C) Copyright 2007-2009 DENX Software Engineering
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
- #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->arch.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) */
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