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1/*
2 * Intel Wireless UWB Link 1480
3 * PHY parameters upload
4 *
5 * Copyright (C) 2005-2006 Intel Corporation
6 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
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 version
10 * 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 * 02110-1301, USA.
21 *
22 *
23 * Code for uploading the PHY parameters to the PHY through the UWB
24 * Radio Control interface.
25 *
26 * We just send the data through the MPI interface using HWA-like
27 * commands and then reset the PHY to make sure it is ok.
28 */
29#include <linux/delay.h>
30#include <linux/device.h>
31#include <linux/firmware.h>
32#include <linux/usb/wusb.h>
33#include "i1480-dfu.h"
34
35
36/**
37 * Write a value array to an address of the MPI interface
38 *
39 * @i1480: Device descriptor
40 * @data: Data array to write
41 * @size: Size of the data array
42 * @returns: 0 if ok, < 0 errno code on error.
43 *
44 * The data array is organized into pairs:
45 *
46 * ADDRESS VALUE
47 *
48 * ADDRESS is BE 16 bit unsigned, VALUE 8 bit unsigned. Size thus has
49 * to be a multiple of three.
50 */
51static
52int i1480_mpi_write(struct i1480 *i1480, const void *data, size_t size)
53{
54 int result;
55 struct i1480_cmd_mpi_write *cmd = i1480->cmd_buf;
56 struct i1480_evt_confirm *reply = i1480->evt_buf;
57
58 BUG_ON(size > 480);
59 result = -ENOMEM;
60 cmd->rccb.bCommandType = i1480_CET_VS1;
61 cmd->rccb.wCommand = cpu_to_le16(i1480_CMD_MPI_WRITE);
62 cmd->size = cpu_to_le16(size);
63 memcpy(cmd->data, data, size);
64 reply->rceb.bEventType = i1480_CET_VS1;
65 reply->rceb.wEvent = i1480_CMD_MPI_WRITE;
66 result = i1480_cmd(i1480, "MPI-WRITE", sizeof(*cmd) + size, sizeof(*reply));
67 if (result < 0)
68 goto out;
69 if (reply->bResultCode != UWB_RC_RES_SUCCESS) {
70 dev_err(i1480->dev, "MPI-WRITE: command execution failed: %d\n",
71 reply->bResultCode);
72 result = -EIO;
73 }
74out:
75 return result;
76}
77
78
79/**
80 * Read a value array to from an address of the MPI interface
81 *
82 * @i1480: Device descriptor
83 * @data: where to place the read array
84 * @srcaddr: Where to read from
85 * @size: Size of the data read array
86 * @returns: 0 if ok, < 0 errno code on error.
87 *
88 * The command data array is organized into pairs ADDR0 ADDR1..., and
89 * the returned data in ADDR0 VALUE0 ADDR1 VALUE1...
90 *
91 * We generate the command array to be a sequential read and then
92 * rearrange the result.
93 *
94 * We use the i1480->cmd_buf for the command, i1480->evt_buf for the reply.
95 *
96 * As the reply has to fit in 512 bytes (i1480->evt_buffer), the max amount
97 * of values we can read is (512 - sizeof(*reply)) / 3
98 */
99static
100int i1480_mpi_read(struct i1480 *i1480, u8 *data, u16 srcaddr, size_t size)
101{
102 int result;
103 struct i1480_cmd_mpi_read *cmd = i1480->cmd_buf;
104 struct i1480_evt_mpi_read *reply = i1480->evt_buf;
105 unsigned cnt;
106
107 memset(i1480->cmd_buf, 0x69, 512);
108 memset(i1480->evt_buf, 0x69, 512);
109
110 BUG_ON(size > (i1480->buf_size - sizeof(*reply)) / 3);
111 result = -ENOMEM;
112 cmd->rccb.bCommandType = i1480_CET_VS1;
113 cmd->rccb.wCommand = cpu_to_le16(i1480_CMD_MPI_READ);
114 cmd->size = cpu_to_le16(3*size);
115 for (cnt = 0; cnt < size; cnt++) {
116 cmd->data[cnt].page = (srcaddr + cnt) >> 8;
117 cmd->data[cnt].offset = (srcaddr + cnt) & 0xff;
118 }
119 reply->rceb.bEventType = i1480_CET_VS1;
120 reply->rceb.wEvent = i1480_CMD_MPI_READ;
121 result = i1480_cmd(i1480, "MPI-READ", sizeof(*cmd) + 2*size,
122 sizeof(*reply) + 3*size);
123 if (result < 0)
124 goto out;
125 if (reply->bResultCode != UWB_RC_RES_SUCCESS) {
126 dev_err(i1480->dev, "MPI-READ: command execution failed: %d\n",
127 reply->bResultCode);
128 result = -EIO;
129 }
130 for (cnt = 0; cnt < size; cnt++) {
131 if (reply->data[cnt].page != (srcaddr + cnt) >> 8)
132 dev_err(i1480->dev, "MPI-READ: page inconsistency at "
133 "index %u: expected 0x%02x, got 0x%02x\n", cnt,
134 (srcaddr + cnt) >> 8, reply->data[cnt].page);
135 if (reply->data[cnt].offset != ((srcaddr + cnt) & 0x00ff))
136 dev_err(i1480->dev, "MPI-READ: offset inconsistency at "
137 "index %u: expected 0x%02x, got 0x%02x\n", cnt,
138 (srcaddr + cnt) & 0x00ff,
139 reply->data[cnt].offset);
140 data[cnt] = reply->data[cnt].value;
141 }
142 result = 0;
143out:
144 return result;
145}
146
147
148/**
149 * Upload a PHY firmware, wait for it to start
150 *
151 * @i1480: Device instance
152 * @fw_name: Name of the file that contains the firmware
153 *
154 * We assume the MAC fw is up and running. This means we can use the
155 * MPI interface to write the PHY firmware. Once done, we issue an
156 * MBOA Reset, which will force the MAC to reset and reinitialize the
157 * PHY. If that works, we are ready to go.
158 *
159 * Max packet size for the MPI write is 512, so the max buffer is 480
160 * (which gives us 160 byte triads of MSB, LSB and VAL for the data).
161 */
162int i1480_phy_fw_upload(struct i1480 *i1480)
163{
164 int result;
165 const struct firmware *fw;
166 const char *data_itr, *data_top;
167 const size_t MAX_BLK_SIZE = 480; /* 160 triads */
168 size_t data_size;
169 u8 phy_stat;
170
171 result = request_firmware(&fw, i1480->phy_fw_name, i1480->dev);
172 if (result < 0)
173 goto out;
174 /* Loop writing data in chunks as big as possible until done. */
175 for (data_itr = fw->data, data_top = data_itr + fw->size;
176 data_itr < data_top; data_itr += MAX_BLK_SIZE) {
177 data_size = min(MAX_BLK_SIZE, (size_t) (data_top - data_itr));
178 result = i1480_mpi_write(i1480, data_itr, data_size);
179 if (result < 0)
180 goto error_mpi_write;
181 }
182 /* Read MPI page 0, offset 6; if 0, PHY was initialized correctly. */
183 result = i1480_mpi_read(i1480, &phy_stat, 0x0006, 1);
184 if (result < 0) {
185 dev_err(i1480->dev, "PHY: can't get status: %d\n", result);
186 goto error_mpi_status;
187 }
188 if (phy_stat != 0) {
189 result = -ENODEV;
190 dev_info(i1480->dev, "error, PHY not ready: %u\n", phy_stat);
191 goto error_phy_status;
192 }
193 dev_info(i1480->dev, "PHY fw '%s': uploaded\n", i1480->phy_fw_name);
194error_phy_status:
195error_mpi_status:
196error_mpi_write:
197 release_firmware(fw);
198 if (result < 0)
199 dev_err(i1480->dev, "PHY fw '%s': failed to upload (%d), "
200 "power cycle device\n", i1480->phy_fw_name, result);
201out:
202 return result;
203}