diff options
Diffstat (limited to 'drivers/media/video/cx25840/cx25840-firmware.c')
| -rw-r--r-- | drivers/media/video/cx25840/cx25840-firmware.c | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/drivers/media/video/cx25840/cx25840-firmware.c b/drivers/media/video/cx25840/cx25840-firmware.c deleted file mode 100644 index 0b2dceb7410..00000000000 --- a/drivers/media/video/cx25840/cx25840-firmware.c +++ /dev/null @@ -1,137 +0,0 @@ -/* cx25840 firmware functions - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - */ - -#include <linux/module.h> -#include <linux/i2c.h> -#include <linux/firmware.h> -#include <media/v4l2-common.h> -#include <media/cx25840.h> - -#include "cx25840-core.h" - -#define FWFILE "v4l-cx25840.fw" -#define FWFILE_CX23885 "v4l-cx23885-avcore-01.fw" - -/* - * Mike Isely <isely@pobox.com> - The FWSEND parameter controls the - * size of the firmware chunks sent down the I2C bus to the chip. - * Previously this had been set to 1024 but unfortunately some I2C - * implementations can't transfer data in such big gulps. - * Specifically, the pvrusb2 driver has a hard limit of around 60 - * bytes, due to the encapsulation there of I2C traffic into USB - * messages. So we have to significantly reduce this parameter. - */ -#define FWSEND 48 - -#define FWDEV(x) &((x)->dev) - -static char *firmware = FWFILE; - -module_param(firmware, charp, 0444); - -MODULE_PARM_DESC(firmware, "Firmware image [default: " FWFILE "]"); - -static void start_fw_load(struct i2c_client *client) -{ - /* DL_ADDR_LB=0 DL_ADDR_HB=0 */ - cx25840_write(client, 0x800, 0x00); - cx25840_write(client, 0x801, 0x00); - // DL_MAP=3 DL_AUTO_INC=0 DL_ENABLE=1 - cx25840_write(client, 0x803, 0x0b); - /* AUTO_INC_DIS=1 */ - cx25840_write(client, 0x000, 0x20); -} - -static void end_fw_load(struct i2c_client *client) -{ - /* AUTO_INC_DIS=0 */ - cx25840_write(client, 0x000, 0x00); - /* DL_ENABLE=0 */ - cx25840_write(client, 0x803, 0x03); -} - -static int check_fw_load(struct i2c_client *client, int size) -{ - /* DL_ADDR_HB DL_ADDR_LB */ - int s = cx25840_read(client, 0x801) << 8; - s |= cx25840_read(client, 0x800); - - if (size != s) { - v4l_err(client, "firmware %s load failed\n", firmware); - return -EINVAL; - } - - v4l_info(client, "loaded %s firmware (%d bytes)\n", firmware, size); - return 0; -} - -static int fw_write(struct i2c_client *client, const u8 *data, int size) -{ - if (i2c_master_send(client, data, size) < size) { - v4l_err(client, "firmware load i2c failure\n"); - return -ENOSYS; - } - - return 0; -} - -int cx25840_loadfw(struct i2c_client *client) -{ - struct cx25840_state *state = to_state(i2c_get_clientdata(client)); - const struct firmware *fw = NULL; - u8 buffer[FWSEND]; - const u8 *ptr; - int size, retval; - - if (state->is_cx23885) - firmware = FWFILE_CX23885; - - if (request_firmware(&fw, firmware, FWDEV(client)) != 0) { - v4l_err(client, "unable to open firmware %s\n", firmware); - return -EINVAL; - } - - start_fw_load(client); - - buffer[0] = 0x08; - buffer[1] = 0x02; - - size = fw->size; - ptr = fw->data; - while (size > 0) { - int len = min(FWSEND - 2, size); - - memcpy(buffer + 2, ptr, len); - - retval = fw_write(client, buffer, len + 2); - - if (retval < 0) { - release_firmware(fw); - return retval; - } - - size -= len; - ptr += len; - } - - end_fw_load(client); - - size = fw->size; - release_firmware(fw); - - return check_fw_load(client, size); -} |