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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/media/video/cx25840/cx25840-firmware.c
1 /* cx25840 firmware functions
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU General Public License
5 * as published by the Free Software Foundation; either version 2
6 * of the License, or (at your option) any later version.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 #include <linux/module.h>
19 #include <linux/i2c.h>
20 #include <linux/i2c-algo-bit.h>
21 #include <linux/firmware.h>
22 #include <media/v4l2-common.h>
23 #include <media/cx25840.h>
25 #include "cx25840-core.h"
27 #define FWFILE "v4l-cx25840.fw"
30 #define FWDEV(x) &((x)->adapter->dev)
32 static int fastfw
= 1;
33 static char *firmware
= FWFILE
;
35 module_param(fastfw
, bool, 0444);
36 module_param(firmware
, charp
, 0444);
38 MODULE_PARM_DESC(fastfw
, "Load firmware fast [0=100MHz 1=333MHz (default)]");
39 MODULE_PARM_DESC(firmware
, "Firmware image [default: " FWFILE
"]");
41 static void set_i2c_delay(struct i2c_client
*client
, int delay
)
43 struct i2c_algo_bit_data
*algod
= client
->adapter
->algo_data
;
45 /* We aren't guaranteed to be using algo_bit,
46 * so avoid the null pointer dereference
47 * and disable the 'fast firmware load' */
49 algod
->udelay
= delay
;
55 static void start_fw_load(struct i2c_client
*client
)
57 /* DL_ADDR_LB=0 DL_ADDR_HB=0 */
58 cx25840_write(client
, 0x800, 0x00);
59 cx25840_write(client
, 0x801, 0x00);
60 // DL_MAP=3 DL_AUTO_INC=0 DL_ENABLE=1
61 cx25840_write(client
, 0x803, 0x0b);
63 cx25840_write(client
, 0x000, 0x20);
66 set_i2c_delay(client
, 3);
69 static void end_fw_load(struct i2c_client
*client
)
72 set_i2c_delay(client
, 10);
75 cx25840_write(client
, 0x000, 0x00);
77 cx25840_write(client
, 0x803, 0x03);
80 static int check_fw_load(struct i2c_client
*client
, int size
)
82 /* DL_ADDR_HB DL_ADDR_LB */
83 int s
= cx25840_read(client
, 0x801) << 8;
84 s
|= cx25840_read(client
, 0x800);
87 v4l_err(client
, "firmware %s load failed\n", firmware
);
91 v4l_info(client
, "loaded %s firmware (%d bytes)\n", firmware
, size
);
95 static int fw_write(struct i2c_client
*client
, u8
* data
, int size
)
99 if ((sent
= i2c_master_send(client
, data
, size
)) < size
) {
102 v4l_err(client
, "333MHz i2c firmware load failed\n");
104 set_i2c_delay(client
, 10);
107 u16 dl_addr
= cx25840_read(client
, 0x801) << 8;
108 dl_addr
|= cx25840_read(client
, 0x800);
110 cx25840_write(client
, 0x801, dl_addr
>> 8);
111 cx25840_write(client
, 0x800, dl_addr
& 0xff);
114 if (i2c_master_send(client
, data
, size
) < size
) {
115 v4l_err(client
, "100MHz i2c firmware load failed\n");
120 v4l_err(client
, "firmware load i2c failure\n");
129 int cx25840_loadfw(struct i2c_client
*client
)
131 const struct firmware
*fw
= NULL
;
133 int size
, send
, retval
;
135 if (request_firmware(&fw
, firmware
, FWDEV(client
)) != 0) {
136 v4l_err(client
, "unable to open firmware %s\n", firmware
);
140 start_fw_load(client
);
144 buffer
[2] = fw
->data
[0];
145 buffer
[3] = fw
->data
[1];
146 retval
= fw_write(client
, buffer
, 4);
149 release_firmware(fw
);
158 send
= size
> (FWSEND
- 2) ? FWSEND
: size
+ 2;
159 retval
= fw_write(client
, ptr
, send
);
162 release_firmware(fw
);
173 release_firmware(fw
);
175 return check_fw_load(client
, size
);