1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/*
* Intel Wireless WiMAX Connection 2400m
* Firmware uploader's SDIO specifics
*
*
* Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*
* Intel Corporation <linux-wimax@intel.com>
* Yanir Lubetkin <yanirx.lubetkin@intel.com>
* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
* - Initial implementation
*
* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
* - Bus generic/specific split for USB
*
* Dirk Brandewie <dirk.j.brandewie@intel.com>
* - Initial implementation for SDIO
*
* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
* - SDIO rehash for changes in the bus-driver model
*
* THE PROCEDURE
*
* See fw.c for the generic description of this procedure.
*
* This file implements only the SDIO specifics. It boils down to how
* to send a command and waiting for an acknowledgement from the
* device. We do polled reads.
*
* COMMAND EXECUTION
*
* THe generic firmware upload code will call i2400m_bus_bm_cmd_send()
* to send commands.
*
* The SDIO devices expects things in 256 byte blocks, so it will pad
* it, compute the checksum (if needed) and pass it to SDIO.
*
* ACK RECEPTION
*
* This works in polling mode -- the fw loader says when to wait for
* data and for that it calls i2400ms_bus_bm_wait_for_ack().
*
* This will poll the device for data until it is received. We need to
* receive at least as much bytes as where asked for (although it'll
* always be a multiple of 256 bytes).
*/
#include <linux/mmc/sdio_func.h>
#include "i2400m-sdio.h"
#define D_SUBMODULE fw
#include "sdio-debug-levels.h"
/*
* Send a boot-mode command to the SDIO function
*
* We use a bounce buffer (i2400m->bm_cmd_buf) because we need to
* touch the header if the RAW flag is not set.
*
* @flags: pass thru from i2400m_bm_cmd()
* @return: cmd_size if ok, < 0 errno code on error.
*
* Note the command is padded to the SDIO block size for the device.
*/
ssize_t i2400ms_bus_bm_cmd_send(struct i2400m *i2400m,
const struct i2400m_bootrom_header *_cmd,
size_t cmd_size, int flags)
{
ssize_t result;
struct device *dev = i2400m_dev(i2400m);
struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
int opcode = _cmd == NULL ? -1 : i2400m_brh_get_opcode(_cmd);
struct i2400m_bootrom_header *cmd;
/* SDIO restriction */
size_t cmd_size_a = ALIGN(cmd_size, I2400MS_BLK_SIZE);
d_fnstart(5, dev, "(i2400m %p cmd %p size %zu)\n",
i2400m, _cmd, cmd_size);
result = -E2BIG;
if (cmd_size > I2400M_BM_CMD_BUF_SIZE)
goto error_too_big;
memcpy(i2400m->bm_cmd_buf, _cmd, cmd_size); /* Prep command */
cmd = i2400m->bm_cmd_buf;
if (cmd_size_a > cmd_size) /* Zero pad space */
memset(i2400m->bm_cmd_buf + cmd_size, 0, cmd_size_a - cmd_size);
if ((flags & I2400M_BM_CMD_RAW) == 0) {
if (WARN_ON(i2400m_brh_get_response_required(cmd) == 0))
dev_warn(dev, "SW BUG: response_required == 0\n");
i2400m_bm_cmd_prepare(cmd);
}
d_printf(4, dev, "BM cmd %d: %zu bytes (%zu padded)\n",
opcode, cmd_size, cmd_size_a);
d_dump(5, dev, cmd, cmd_size);
sdio_claim_host(i2400ms->func); /* Send & check */
result = sdio_memcpy_toio(i2400ms->func, I2400MS_DATA_ADDR,
i2400m->bm_cmd_buf, cmd_size_a);
sdio_release_host(i2400ms->func);
if (result < 0) {
dev_err(dev, "BM cmd %d: cannot send: %ld\n",
opcode, (long) result);
goto error_cmd_send;
}
result = cmd_size;
error_cmd_send:
error_too_big:
d_fnend(5, dev, "(i2400m %p cmd %p size %zu) = %d\n",
i2400m, _cmd, cmd_size, (int) result);
return result;
}
/*
* Read an ack from the device's boot-mode (polling)
*
* @i2400m:
* @_ack: pointer to where to store the read data
* @ack_size: how many bytes we should read
*
* Returns: < 0 errno code on error; otherwise, amount of received bytes.
*
* The ACK for a BM command is always at least sizeof(*ack) bytes, so
* check for that. We don't need to check for device reboots
*
* NOTE: We do an artificial timeout of 1 sec over the SDIO timeout;
* this way we have control over it...there is no way that I know
* of setting an SDIO transaction timeout.
*/
ssize_t i2400ms_bus_bm_wait_for_ack(struct i2400m *i2400m,
struct i2400m_bootrom_header *ack,
size_t ack_size)
{
int result;
ssize_t rx_size;
u64 timeout;
struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
struct sdio_func *func = i2400ms->func;
struct device *dev = &func->dev;
BUG_ON(sizeof(*ack) > ack_size);
d_fnstart(5, dev, "(i2400m %p ack %p size %zu)\n",
i2400m, ack, ack_size);
timeout = get_jiffies_64() + 2 * HZ;
sdio_claim_host(func);
while (1) {
if (time_after64(get_jiffies_64(), timeout)) {
rx_size = -ETIMEDOUT;
dev_err(dev, "timeout waiting for ack data\n");
goto error_timedout;
}
/* Find the RX size, check if it fits or not -- it if
* doesn't fit, fail, as we have no way to dispose of
* the extra data. */
rx_size = __i2400ms_rx_get_size(i2400ms);
if (rx_size < 0)
goto error_rx_get_size;
result = -ENOSPC; /* Check it fits */
if (rx_size < sizeof(*ack)) {
rx_size = -EIO;
dev_err(dev, "HW BUG? received is too small (%zu vs "
"%zu needed)\n", sizeof(*ack), rx_size);
goto error_too_small;
}
if (rx_size > I2400M_BM_ACK_BUF_SIZE) {
dev_err(dev, "SW BUG? BM_ACK_BUF is too small (%u vs "
"%zu needed)\n", I2400M_BM_ACK_BUF_SIZE,
rx_size);
goto error_too_small;
}
/* Read it */
result = sdio_memcpy_fromio(func, i2400m->bm_ack_buf,
I2400MS_DATA_ADDR, rx_size);
if (result == -ETIMEDOUT || result == -ETIME)
continue;
if (result < 0) {
dev_err(dev, "BM SDIO receive (%zu B) failed: %d\n",
rx_size, result);
goto error_read;
} else
break;
}
rx_size = min((ssize_t)ack_size, rx_size);
memcpy(ack, i2400m->bm_ack_buf, rx_size);
error_read:
error_too_small:
error_rx_get_size:
error_timedout:
sdio_release_host(func);
d_fnend(5, dev, "(i2400m %p ack %p size %zu) = %ld\n",
i2400m, ack, ack_size, (long) rx_size);
return rx_size;
}
|
