blob: 139a94a5c1f1e31582d4879b3efc6a9f85e26f0f [file] [log] [blame]
Pavel Herrmann8d1165e11a2012-10-09 07:01:56 +00001/*
2 * (C) Copyright 2000-2011
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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 */
24
25/* Code taken from cmd_ide.c */
26#include <common.h>
27#include <ata.h>
28#include "ide.h"
29
30#ifdef CONFIG_IDE_8xx_DIRECT
31#include <mpc8xx.h>
32#include <pcmcia.h>
33DECLARE_GLOBAL_DATA_PTR;
34
35/* Timings for IDE Interface
36 *
37 * SETUP / LENGTH / HOLD - cycles valid for 50 MHz clk
38 * 70 165 30 PIO-Mode 0, [ns]
39 * 4 9 2 [Cycles]
40 * 50 125 20 PIO-Mode 1, [ns]
41 * 3 7 2 [Cycles]
42 * 30 100 15 PIO-Mode 2, [ns]
43 * 2 6 1 [Cycles]
44 * 30 80 10 PIO-Mode 3, [ns]
45 * 2 5 1 [Cycles]
46 * 25 70 10 PIO-Mode 4, [ns]
47 * 2 4 1 [Cycles]
48 */
49
50static const pio_config_t pio_config_ns[IDE_MAX_PIO_MODE+1] = {
51 /* Setup Length Hold */
52 { 70, 165, 30 }, /* PIO-Mode 0, [ns] */
53 { 50, 125, 20 }, /* PIO-Mode 1, [ns] */
54 { 30, 101, 15 }, /* PIO-Mode 2, [ns] */
55 { 30, 80, 10 }, /* PIO-Mode 3, [ns] */
56 { 25, 70, 10 }, /* PIO-Mode 4, [ns] */
57};
58
59static pio_config_t pio_config_clk[IDE_MAX_PIO_MODE+1];
60
61#ifndef CONFIG_SYS_PIO_MODE
62#define CONFIG_SYS_PIO_MODE 0 /* use a relaxed default */
63#endif
64static int pio_mode = CONFIG_SYS_PIO_MODE;
65
66/* Make clock cycles and always round up */
67
68#define PCMCIA_MK_CLKS(t, T) (((t) * (T) + 999U) / 1000U)
69
70static void set_pcmcia_timing(int pmode)
71{
72 volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
73 volatile pcmconf8xx_t *pcmp = &(immr->im_pcmcia);
74 ulong timings;
75
76 debug("Set timing for PIO Mode %d\n", pmode);
77
78 timings = PCMCIA_SHT(pio_config_clk[pmode].t_hold)
79 | PCMCIA_SST(pio_config_clk[pmode].t_setup)
80 | PCMCIA_SL(pio_config_clk[pmode].t_length);
81
82 /*
83 * IDE 0
84 */
85 pcmp->pcmc_pbr0 = CONFIG_SYS_PCMCIA_PBR0;
86#if (CONFIG_SYS_PCMCIA_POR0 != 0)
87 pcmp->pcmc_por0 = CONFIG_SYS_PCMCIA_POR0 | timings;
88#else
89 pcmp->pcmc_por0 = CONFIG_SYS_PCMCIA_POR0;
90#endif
91 debug("PBR0: %08x POR0: %08x\n", pcmp->pcmc_pbr0, pcmp->pcmc_por0);
92
93 pcmp->pcmc_pbr1 = CONFIG_SYS_PCMCIA_PBR1;
94#if (CONFIG_SYS_PCMCIA_POR1 != 0)
95 pcmp->pcmc_por1 = CONFIG_SYS_PCMCIA_POR1 | timings;
96#else
97 pcmp->pcmc_por1 = CONFIG_SYS_PCMCIA_POR1;
98#endif
99 debug("PBR1: %08x POR1: %08x\n", pcmp->pcmc_pbr1, pcmp->pcmc_por1);
100
101 pcmp->pcmc_pbr2 = CONFIG_SYS_PCMCIA_PBR2;
102#if (CONFIG_SYS_PCMCIA_POR2 != 0)
103 pcmp->pcmc_por2 = CONFIG_SYS_PCMCIA_POR2 | timings;
104#else
105 pcmp->pcmc_por2 = CONFIG_SYS_PCMCIA_POR2;
106#endif
107 debug("PBR2: %08x POR2: %08x\n", pcmp->pcmc_pbr2, pcmp->pcmc_por2);
108
109 pcmp->pcmc_pbr3 = CONFIG_SYS_PCMCIA_PBR3;
110#if (CONFIG_SYS_PCMCIA_POR3 != 0)
111 pcmp->pcmc_por3 = CONFIG_SYS_PCMCIA_POR3 | timings;
112#else
113 pcmp->pcmc_por3 = CONFIG_SYS_PCMCIA_POR3;
114#endif
115 debug("PBR3: %08x POR3: %08x\n", pcmp->pcmc_pbr3, pcmp->pcmc_por3);
116
117 /*
118 * IDE 1
119 */
120 pcmp->pcmc_pbr4 = CONFIG_SYS_PCMCIA_PBR4;
121#if (CONFIG_SYS_PCMCIA_POR4 != 0)
122 pcmp->pcmc_por4 = CONFIG_SYS_PCMCIA_POR4 | timings;
123#else
124 pcmp->pcmc_por4 = CONFIG_SYS_PCMCIA_POR4;
125#endif
126 debug("PBR4: %08x POR4: %08x\n", pcmp->pcmc_pbr4, pcmp->pcmc_por4);
127
128 pcmp->pcmc_pbr5 = CONFIG_SYS_PCMCIA_PBR5;
129#if (CONFIG_SYS_PCMCIA_POR5 != 0)
130 pcmp->pcmc_por5 = CONFIG_SYS_PCMCIA_POR5 | timings;
131#else
132 pcmp->pcmc_por5 = CONFIG_SYS_PCMCIA_POR5;
133#endif
134 debug("PBR5: %08x POR5: %08x\n", pcmp->pcmc_pbr5, pcmp->pcmc_por5);
135
136 pcmp->pcmc_pbr6 = CONFIG_SYS_PCMCIA_PBR6;
137#if (CONFIG_SYS_PCMCIA_POR6 != 0)
138 pcmp->pcmc_por6 = CONFIG_SYS_PCMCIA_POR6 | timings;
139#else
140 pcmp->pcmc_por6 = CONFIG_SYS_PCMCIA_POR6;
141#endif
142 debug("PBR6: %08x POR6: %08x\n", pcmp->pcmc_pbr6, pcmp->pcmc_por6);
143
144 pcmp->pcmc_pbr7 = CONFIG_SYS_PCMCIA_PBR7;
145#if (CONFIG_SYS_PCMCIA_POR7 != 0)
146 pcmp->pcmc_por7 = CONFIG_SYS_PCMCIA_POR7 | timings;
147#else
148 pcmp->pcmc_por7 = CONFIG_SYS_PCMCIA_POR7;
149#endif
150 debug("PBR7: %08x POR7: %08x\n", pcmp->pcmc_pbr7, pcmp->pcmc_por7);
151
152}
153
154int ide_preinit(void)
155{
156 int i;
157 /* Initialize PIO timing tables */
158 for (i = 0; i <= IDE_MAX_PIO_MODE; ++i) {
159 pio_config_clk[i].t_setup =
160 PCMCIA_MK_CLKS(pio_config_ns[i].t_setup, gd->bus_clk);
161 pio_config_clk[i].t_length =
162 PCMCIA_MK_CLKS(pio_config_ns[i].t_length, gd->bus_clk);
163 pio_config_clk[i].t_hold =
164 PCMCIA_MK_CLKS(pio_config_ns[i].t_hold, gd->bus_clk);
165 debug("PIO Mode %d: setup=%2d ns/%d clk" " len=%3d ns/%d clk"
166 " hold=%2d ns/%d clk\n", i, pio_config_ns[i].t_setup,
167 pio_config_clk[i].t_setup, pio_config_ns[i].t_length,
168 pio_config_clk[i].t_length, pio_config_ns[i].t_hold,
169 pio_config_clk[i].t_hold);
170 }
171
172 return 0;
173}
174
175int ide_init_postreset(void)
176{
177 volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
178 volatile pcmconf8xx_t *pcmp = &(immr->im_pcmcia);
179
180 /* PCMCIA / IDE initialization for common mem space */
181 pcmp->pcmc_pgcrb = 0;
182
183 /* start in PIO mode 0 - most relaxed timings */
184 pio_mode = 0;
185 set_pcmcia_timing(pio_mode);
186 return 0;
187}
188#endif /* CONFIG_IDE_8xx_DIRECT */
189
190#ifdef CONFIG_IDE_8xx_PCCARD
191int ide_preinit(void)
192{
193 ide_devices_found = 0;
194 /* initialize the PCMCIA IDE adapter card */
195 pcmcia_on();
196 if (!ide_devices_found)
197 return 1;
198 udelay(1000000);/* 1 s */
199 return 0;
200}
201#endif