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28#include <common.h>
29#include <command.h>
30#include <systemace.h>
31#include <part.h>
32#include <asm/io.h>
33
34
35
36
37
38
39
40
41
42static u32 base = CONFIG_SYS_SYSTEMACE_BASE;
43static u32 width = CONFIG_SYS_SYSTEMACE_WIDTH;
44
45static void ace_writew(u16 val, unsigned off)
46{
47 if (width == 8) {
48#if !defined(__BIG_ENDIAN)
49 writeb(val >> 8, base + off);
50 writeb(val, base + off + 1);
51#else
52 writeb(val, base + off);
53 writeb(val >> 8, base + off + 1);
54#endif
55 } else
56 out16(base + off, val);
57}
58
59static u16 ace_readw(unsigned off)
60{
61 if (width == 8) {
62#if !defined(__BIG_ENDIAN)
63 return (readb(base + off) << 8) | readb(base + off + 1);
64#else
65 return readb(base + off) | (readb(base + off + 1) << 8);
66#endif
67 }
68
69 return in16(base + off);
70}
71
72static unsigned long systemace_read(struct blk_desc *block_dev,
73 unsigned long start, lbaint_t blkcnt,
74 void *buffer);
75
76static struct blk_desc systemace_dev = { 0 };
77
78static int get_cf_lock(void)
79{
80 int retry = 10;
81
82
83 unsigned val = ace_readw(0x18);
84 val |= 0x0002;
85 ace_writew((val & 0xffff), 0x18);
86
87
88 while (!(ace_readw(0x04) & 0x0002)) {
89
90 if (retry < 0)
91 return -1;
92
93 udelay(100000);
94 retry -= 1;
95 }
96
97 return 0;
98}
99
100static void release_cf_lock(void)
101{
102 unsigned val = ace_readw(0x18);
103 val &= ~(0x0002);
104 ace_writew((val & 0xffff), 0x18);
105}
106
107#ifdef CONFIG_PARTITIONS
108struct blk_desc *systemace_get_dev(int dev)
109{
110
111
112 if (systemace_dev.blksz == 0) {
113 systemace_dev.if_type = IF_TYPE_UNKNOWN;
114 systemace_dev.devnum = 0;
115 systemace_dev.part_type = PART_TYPE_UNKNOWN;
116 systemace_dev.type = DEV_TYPE_HARDDISK;
117 systemace_dev.blksz = 512;
118 systemace_dev.log2blksz = LOG2(systemace_dev.blksz);
119 systemace_dev.removable = 1;
120 systemace_dev.block_read = systemace_read;
121
122
123
124
125 ace_writew(width == 8 ? 0 : 0x0001, 0);
126
127 part_init(&systemace_dev);
128
129 }
130
131 return &systemace_dev;
132}
133#endif
134
135
136
137
138
139
140static unsigned long systemace_read(struct blk_desc *block_dev,
141 unsigned long start, lbaint_t blkcnt,
142 void *buffer)
143{
144 int retry;
145 unsigned blk_countdown;
146 unsigned char *dp = buffer;
147 unsigned val;
148
149 if (get_cf_lock() < 0) {
150 unsigned status = ace_readw(0x04);
151
152
153 if (!(status & 0x0010)) {
154 printf("** CompactFlash card not present. **\n");
155 return 0;
156 }
157
158 printf("**** ACE locked away from me (STATUSREG=%04x)\n",
159 status);
160 return 0;
161 }
162#ifdef DEBUG_SYSTEMACE
163 printf("... systemace read %lu sectors at %lu\n", blkcnt, start);
164#endif
165
166 retry = 2000;
167 for (;;) {
168 val = ace_readw(0x04);
169
170
171 if (!(val & 0x0010)) {
172 printf("**** ACE CompactFlash not found.\n");
173 release_cf_lock();
174 return 0;
175 }
176
177
178 if (val & 0x0100)
179 break;
180
181 if (retry < 0) {
182 printf("**** SystemACE not ready.\n");
183 release_cf_lock();
184 return 0;
185 }
186
187 udelay(1000);
188 retry -= 1;
189 }
190
191
192
193
194
195 blk_countdown = blkcnt;
196 while (blk_countdown > 0) {
197 unsigned trans = blk_countdown;
198
199 if (trans > 256)
200 trans = 256;
201
202#ifdef DEBUG_SYSTEMACE
203 printf("... transfer %lu sector in a chunk\n", trans);
204#endif
205
206 ace_writew((start >> 0) & 0xffff, 0x10);
207 ace_writew((start >> 16) & 0x0fff, 0x12);
208
209
210
211
212
213
214 ace_writew((trans & 0xff) | 0x0300, 0x14);
215
216
217
218
219
220#ifndef SYSTEMACE_CONFIG_FPGA
221
222 val = ace_readw(0x18);
223 val |= 0x0080;
224 ace_writew(val, 0x18);
225#endif
226
227 retry = trans * 16;
228 while (retry > 0) {
229 int idx;
230
231
232 while (!(ace_readw(0x04) & 0x0020)) {
233 udelay(100);
234 }
235
236
237 for (idx = 0; idx < 16; idx += 1) {
238 unsigned short val = ace_readw(0x40);
239 *dp++ = val & 0xff;
240 *dp++ = (val >> 8) & 0xff;
241 }
242
243 retry -= 1;
244 }
245
246
247 val = ace_readw(0x18);
248 val &= ~0x0080;
249 ace_writew(val, 0x18);
250
251
252 start += trans;
253 blk_countdown -= trans;
254 }
255
256 release_cf_lock();
257
258 return blkcnt;
259}
260