diff options
Diffstat (limited to 'drivers/media/video/cx25840/cx25840-firmware.c')
| -rw-r--r-- | drivers/media/video/cx25840/cx25840-firmware.c | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/drivers/media/video/cx25840/cx25840-firmware.c b/drivers/media/video/cx25840/cx25840-firmware.c deleted file mode 100644 index b3169f94ece8..000000000000 --- a/drivers/media/video/cx25840/cx25840-firmware.c +++ /dev/null @@ -1,175 +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" - -/* - * 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 = ""; - -module_param(firmware, charp, 0444); - -MODULE_PARM_DESC(firmware, "Firmware image to load"); - -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); -} - -#define CX2388x_FIRMWARE "v4l-cx23885-avcore-01.fw" -#define CX231xx_FIRMWARE "v4l-cx231xx-avcore-01.fw" -#define CX25840_FIRMWARE "v4l-cx25840.fw" - -static const char *get_fw_name(struct i2c_client *client) -{ - struct cx25840_state *state = to_state(i2c_get_clientdata(client)); - - if (firmware[0]) - return firmware; - if (is_cx2388x(state)) - return CX2388x_FIRMWARE; - if (is_cx231xx(state)) - return CX231xx_FIRMWARE; - return CX25840_FIRMWARE; -} - -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", - get_fw_name(client)); - return -EINVAL; - } - - v4l_info(client, "loaded %s firmware (%d bytes)\n", - get_fw_name(client), 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; - const char *fwname = get_fw_name(client); - int size, retval; - int MAX_BUF_SIZE = FWSEND; - u32 gpio_oe = 0, gpio_da = 0; - - if (is_cx2388x(state)) { - /* Preserve the GPIO OE and output bits */ - gpio_oe = cx25840_read(client, 0x160); - gpio_da = cx25840_read(client, 0x164); - } - - if (is_cx231xx(state) && MAX_BUF_SIZE > 16) { - v4l_err(client, " Firmware download size changed to 16 bytes max length\n"); - MAX_BUF_SIZE = 16; /* cx231xx cannot accept more than 16 bytes at a time */ - } - - if (request_firmware(&fw, fwname, FWDEV(client)) != 0) { - v4l_err(client, "unable to open firmware %s\n", fwname); - return -EINVAL; - } - - start_fw_load(client); - - buffer[0] = 0x08; - buffer[1] = 0x02; - - size = fw->size; - ptr = fw->data; - while (size > 0) { - int len = min(MAX_BUF_SIZE - 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); - - if (is_cx2388x(state)) { - /* Restore GPIO configuration after f/w load */ - cx25840_write(client, 0x160, gpio_oe); - cx25840_write(client, 0x164, gpio_da); - } - - return check_fw_load(client, size); -} - -MODULE_FIRMWARE(CX2388x_FIRMWARE); -MODULE_FIRMWARE(CX231xx_FIRMWARE); -MODULE_FIRMWARE(CX25840_FIRMWARE); - |