1 | /* |
---|
2 | * Copyright (c) 2010 embedded brains GmbH. |
---|
3 | * |
---|
4 | * Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia |
---|
5 | * Authors: Eugeny S. Mints <Eugeny.Mints@oktet.ru> |
---|
6 | * |
---|
7 | * The license and distribution terms for this file may be |
---|
8 | * found in the file LICENSE in this distribution or at |
---|
9 | * http://www.rtems.org/license/LICENSE. |
---|
10 | */ |
---|
11 | |
---|
12 | #include <assert.h> |
---|
13 | #include <string.h> |
---|
14 | |
---|
15 | #include <libchip/ide_ctrl_io.h> |
---|
16 | #include <libchip/ide_ctrl_cfg.h> |
---|
17 | #include <libchip/ata_internal.h> |
---|
18 | |
---|
19 | /* ata_process_request_on_init_phase -- |
---|
20 | * Process the ATA request during system initialization. Request |
---|
21 | * processing is syncronous and doesn't use multiprocessing enviroment. |
---|
22 | * |
---|
23 | * PARAMETERS: |
---|
24 | * ctrl_minor - controller identifier |
---|
25 | * areq - ATA request |
---|
26 | * |
---|
27 | * RETURNS: |
---|
28 | * NONE |
---|
29 | */ |
---|
30 | void |
---|
31 | ata_process_request_on_init_phase(rtems_device_minor_number ctrl_minor, |
---|
32 | ata_req_t *areq) |
---|
33 | { |
---|
34 | uint16_t byte;/* emphasize that only 8 low bits is meaningful */ |
---|
35 | uint8_t i; |
---|
36 | #if 0 |
---|
37 | uint8_t dev; |
---|
38 | #endif |
---|
39 | uint16_t val, val1; |
---|
40 | volatile unsigned retries; |
---|
41 | |
---|
42 | assert(areq); |
---|
43 | |
---|
44 | #if 0 |
---|
45 | dev = areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] & |
---|
46 | IDE_REGISTER_DEVICE_HEAD_DEV; |
---|
47 | #endif |
---|
48 | |
---|
49 | ide_controller_write_register(ctrl_minor, IDE_REGISTER_DEVICE_HEAD, |
---|
50 | areq->regs.regs[IDE_REGISTER_DEVICE_HEAD]); |
---|
51 | |
---|
52 | retries = 0; |
---|
53 | do { |
---|
54 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &byte); |
---|
55 | /* If device (on INIT, i.e. it should be idle) is neither |
---|
56 | * busy nor ready something's fishy, i.e., there is probably |
---|
57 | * no device present. |
---|
58 | * I'd like to do a proper timeout but don't know of a portable |
---|
59 | * timeout routine (w/o using multitasking / rtems_task_wake_after()) |
---|
60 | */ |
---|
61 | if ( ! (byte & (IDE_REGISTER_STATUS_BSY | IDE_REGISTER_STATUS_DRDY))) { |
---|
62 | retries++; |
---|
63 | if ( 10000 == retries ) { |
---|
64 | /* probably no drive connected */ |
---|
65 | areq->breq->status = RTEMS_UNSATISFIED; |
---|
66 | return; |
---|
67 | } |
---|
68 | } |
---|
69 | } while ((byte & IDE_REGISTER_STATUS_BSY) || |
---|
70 | (!(byte & IDE_REGISTER_STATUS_DRDY))); |
---|
71 | |
---|
72 | for (i=0; i< ATA_MAX_CMD_REG_OFFSET; i++) |
---|
73 | { |
---|
74 | uint32_t reg = (1 << i); |
---|
75 | if (areq->regs.to_write & reg) |
---|
76 | ide_controller_write_register(ctrl_minor, i, |
---|
77 | areq->regs.regs[i]); |
---|
78 | } |
---|
79 | |
---|
80 | do { |
---|
81 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &byte); |
---|
82 | } while (byte & IDE_REGISTER_STATUS_BSY); |
---|
83 | |
---|
84 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &val); |
---|
85 | ide_controller_read_register(ctrl_minor, IDE_REGISTER_ERROR, &val1); |
---|
86 | |
---|
87 | if (val & IDE_REGISTER_STATUS_ERR) |
---|
88 | { |
---|
89 | areq->breq->status = RTEMS_IO_ERROR; |
---|
90 | return; |
---|
91 | } |
---|
92 | |
---|
93 | switch(areq->type) |
---|
94 | { |
---|
95 | case ATA_COMMAND_TYPE_PIO_IN: |
---|
96 | if (areq->cnt) |
---|
97 | { |
---|
98 | int ccbuf = areq->cbuf; |
---|
99 | ide_controller_read_data_block(ctrl_minor, |
---|
100 | areq->breq->bufs[0].length * areq->cnt, |
---|
101 | areq->breq->bufs, &areq->cbuf, |
---|
102 | &areq->pos); |
---|
103 | ccbuf = areq->cbuf - ccbuf; |
---|
104 | areq->cnt -= ccbuf; |
---|
105 | } |
---|
106 | if (areq->cnt == 0) |
---|
107 | { |
---|
108 | areq->breq->status = RTEMS_SUCCESSFUL; |
---|
109 | } |
---|
110 | else |
---|
111 | { |
---|
112 | /* |
---|
113 | * this shouldn't happend on the initialization |
---|
114 | * phase! |
---|
115 | */ |
---|
116 | rtems_fatal_error_occurred(RTEMS_INTERNAL_ERROR); |
---|
117 | } |
---|
118 | break; |
---|
119 | |
---|
120 | case ATA_COMMAND_TYPE_NON_DATA: |
---|
121 | areq->breq->status = RTEMS_SUCCESSFUL; |
---|
122 | areq->info = val1; |
---|
123 | break; |
---|
124 | |
---|
125 | default: |
---|
126 | areq->breq->status = RTEMS_IO_ERROR; |
---|
127 | break; |
---|
128 | } |
---|
129 | } |
---|
130 | |
---|
131 | void ata_breq_init(blkdev_request1 *breq, uint16_t *sector_buffer) |
---|
132 | { |
---|
133 | memset(breq, 0, sizeof(*breq)); |
---|
134 | |
---|
135 | breq->req.done_arg = breq; |
---|
136 | breq->req.bufnum = 1; |
---|
137 | breq->req.bufs [0].length = ATA_SECTOR_SIZE; |
---|
138 | breq->req.bufs [0].buffer = sector_buffer; |
---|
139 | } |
---|
140 | |
---|
141 | rtems_status_code ata_identify_device( |
---|
142 | rtems_device_minor_number ctrl_minor, |
---|
143 | int dev, |
---|
144 | uint16_t *sector_buffer, |
---|
145 | ata_dev_t *device_entry |
---|
146 | ) |
---|
147 | { |
---|
148 | ata_req_t areq; |
---|
149 | blkdev_request1 breq; |
---|
150 | |
---|
151 | ata_breq_init(&breq, sector_buffer); |
---|
152 | |
---|
153 | /* |
---|
154 | * Issue DEVICE IDENTIFY ATA command and get device |
---|
155 | * configuration |
---|
156 | */ |
---|
157 | memset(&areq, 0, sizeof(ata_req_t)); |
---|
158 | areq.type = ATA_COMMAND_TYPE_PIO_IN; |
---|
159 | areq.regs.to_write = ATA_REGISTERS_VALUE(IDE_REGISTER_COMMAND); |
---|
160 | areq.regs.regs [IDE_REGISTER_COMMAND] = ATA_COMMAND_IDENTIFY_DEVICE; |
---|
161 | areq.regs.to_read = ATA_REGISTERS_VALUE(IDE_REGISTER_STATUS); |
---|
162 | areq.breq = (rtems_blkdev_request *)&breq; |
---|
163 | areq.cnt = breq.req.bufnum; |
---|
164 | areq.regs.regs [IDE_REGISTER_DEVICE_HEAD] |= |
---|
165 | dev << IDE_REGISTER_DEVICE_HEAD_DEV_POS; |
---|
166 | |
---|
167 | /* |
---|
168 | * Process the request. Special processing of requests on |
---|
169 | * initialization phase is needed because at this moment there |
---|
170 | * is no multitasking enviroment |
---|
171 | */ |
---|
172 | ata_process_request_on_init_phase(ctrl_minor, &areq); |
---|
173 | |
---|
174 | /* check status of I/O operation */ |
---|
175 | if (breq.req.status != RTEMS_SUCCESSFUL) { |
---|
176 | return RTEMS_IO_ERROR; |
---|
177 | } |
---|
178 | |
---|
179 | /* |
---|
180 | * Parse returned device configuration and fill in ATA internal |
---|
181 | * device info structure |
---|
182 | */ |
---|
183 | device_entry->cylinders = |
---|
184 | CF_LE_W(sector_buffer[ATA_IDENT_WORD_NUM_OF_CURR_LOG_CLNDS]); |
---|
185 | device_entry->heads = |
---|
186 | CF_LE_W(sector_buffer[ATA_IDENT_WORD_NUM_OF_CURR_LOG_HEADS]); |
---|
187 | device_entry->sectors = |
---|
188 | CF_LE_W(sector_buffer[ATA_IDENT_WORD_NUM_OF_CURR_LOG_SECS]); |
---|
189 | device_entry->lba_sectors = |
---|
190 | CF_LE_W(sector_buffer[ATA_IDENT_WORD_NUM_OF_USR_SECS1]); |
---|
191 | device_entry->lba_sectors <<= 16; |
---|
192 | device_entry->lba_sectors += CF_LE_W(sector_buffer[ATA_IDENT_WORD_NUM_OF_USR_SECS0]); |
---|
193 | device_entry->lba_avaible = |
---|
194 | (CF_LE_W(sector_buffer[ATA_IDENT_WORD_CAPABILITIES]) >> 9) & 0x1; |
---|
195 | |
---|
196 | if ((CF_LE_W(sector_buffer[ATA_IDENT_WORD_FIELD_VALIDITY]) & |
---|
197 | ATA_IDENT_BIT_VALID) == 0) { |
---|
198 | /* no "supported modes" info -> use default */ |
---|
199 | device_entry->mode_active = ATA_MODES_PIO3; |
---|
200 | } else { |
---|
201 | device_entry->modes_available = |
---|
202 | ((CF_LE_W(sector_buffer[64]) & 0x1) ? ATA_MODES_PIO3 : 0) | |
---|
203 | ((CF_LE_W(sector_buffer[64]) & 0x2) ? ATA_MODES_PIO4 : 0) | |
---|
204 | ((CF_LE_W(sector_buffer[63]) & 0x1) ? ATA_MODES_DMA0 : 0) | |
---|
205 | ((CF_LE_W(sector_buffer[63]) & 0x2) ? |
---|
206 | ATA_MODES_DMA0 | ATA_MODES_DMA1 : 0) | |
---|
207 | ((CF_LE_W(sector_buffer[63]) & 0x4) ? |
---|
208 | ATA_MODES_DMA0 | ATA_MODES_DMA1 | ATA_MODES_DMA2 : 0); |
---|
209 | if (device_entry->modes_available == 0) { |
---|
210 | return RTEMS_IO_ERROR; |
---|
211 | } |
---|
212 | } |
---|
213 | |
---|
214 | return RTEMS_SUCCESSFUL; |
---|
215 | } |
---|