diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-30 09:58:16 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-30 09:58:16 -0700 |
commit | 240c3c3424366c8109babd2a0fe80855de511b35 (patch) | |
tree | 72eb8652c8e513715efee1e254644b4b670333fd /drivers/staging/media/solo6x10/solo6x10-eeprom.c | |
parent | 19b344efa35dbc253e2d10403dafe6aafda73c56 (diff) | |
parent | df90e2258950fd631cdbf322c1ee1f22068391aa (diff) |
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull media update from Mauro Carvalho Chehab:
- OF documentation and patches at core and drivers, to be used by for
embedded media systems
- some I2C drivers used on go7007 were rewritten/promoted from staging:
sony-btf-mpx, tw2804, tw9903, tw9906, wis-ov7640, wis-uda1342
- add fimc-is driver (Exynos)
- add a new radio driver: radio-si476x
- add a two new tuners: r820t and tuner_it913x
- split camera code on em28xx driver and add more models
- the cypress firmware load is used outside dvb usb drivers. So, move
it to a common directory to make easier to re-use it
- siano media driver updated to work with sms2270 devices
- several work done in order to promote go7007 and solo6x1x out of
staging (still, there are some pending issues)
- several API compliance fixes at v4l2 drivers that don't behave as
expected
- as usual, lots of driver fixes, improvements, cleanups and new device
addition at the existing drivers.
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (831 commits)
[media] cx88: make core less verbose
[media] em28xx: fix oops at em28xx_dvb_bus_ctrl()
[media] s5c73m3: fix indentation of the help section in Kconfig
[media] cx25821-alsa: get rid of a __must_check warning
[media] cx25821-video: declare cx25821_vidioc_s_std as static
[media] cx25821-video: remove maxw from cx25821_vidioc_try_fmt_vid_cap
[media] r820t: Remove a warning for an unused value
[media] dib0090: Fix a warning at dib0090_set_EFUSE
[media] dib8000: fix a warning
[media] dib8000: Fix sub-channel range
[media] dib8000: store dtv_property_cache in a temp var
[media] dib8000: warning fix: declare internal functions as static
[media] r820t: quiet gcc warning on n_ring
[media] r820t: memory leak in release()
[media] r820t: precendence bug in r820t_xtal_check()
[media] videodev2.h: Remove the unused old V4L1 buffer types
[media] anysee: Grammar s/report the/report to/
[media] anysee: Initialize ret = 0 in anysee_frontend_attach()
[media] media: videobuf2: fix the length check for mmap
[media] em28xx: save isoc endpoint number for DVB only if endpoint has alt settings with xMaxPacketSize != 0
...
Diffstat (limited to 'drivers/staging/media/solo6x10/solo6x10-eeprom.c')
-rw-r--r-- | drivers/staging/media/solo6x10/solo6x10-eeprom.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/drivers/staging/media/solo6x10/solo6x10-eeprom.c b/drivers/staging/media/solo6x10/solo6x10-eeprom.c new file mode 100644 index 000000000000..9d1c9bb53d6b --- /dev/null +++ b/drivers/staging/media/solo6x10/solo6x10-eeprom.c @@ -0,0 +1,154 @@ +/* + * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com> + * + * Original author: + * Ben Collins <bcollins@ubuntu.com> + * + * Additional work by: + * John Brooks <john.brooks@bluecherry.net> + * + * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include <linux/kernel.h> +#include <linux/delay.h> + +#include "solo6x10.h" + +/* Control */ +#define EE_SHIFT_CLK 0x04 +#define EE_CS 0x08 +#define EE_DATA_WRITE 0x02 +#define EE_DATA_READ 0x01 +#define EE_ENB (0x80 | EE_CS) + +#define eeprom_delay() udelay(100) +#if 0 +#define eeprom_delay() solo_reg_read(solo_dev, SOLO_EEPROM_CTRL) +#define eeprom_delay() ({ \ + int i, ret; \ + udelay(100); \ + for (i = ret = 0; i < 1000 && !ret; i++) \ + ret = solo_eeprom_reg_read(solo_dev); \ +}) +#endif +#define ADDR_LEN 6 + +/* Commands */ +#define EE_EWEN_CMD 4 +#define EE_EWDS_CMD 4 +#define EE_WRITE_CMD 5 +#define EE_READ_CMD 6 +#define EE_ERASE_CMD 7 + +static unsigned int solo_eeprom_reg_read(struct solo_dev *solo_dev) +{ + return solo_reg_read(solo_dev, SOLO_EEPROM_CTRL) & EE_DATA_READ; +} + +static void solo_eeprom_reg_write(struct solo_dev *solo_dev, u32 data) +{ + solo_reg_write(solo_dev, SOLO_EEPROM_CTRL, data); + eeprom_delay(); +} + +static void solo_eeprom_cmd(struct solo_dev *solo_dev, int cmd) +{ + int i; + + solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ACCESS_EN); + solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE); + + for (i = 4 + ADDR_LEN; i >= 0; i--) { + int dataval = (cmd & (1 << i)) ? EE_DATA_WRITE : 0; + + solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE | dataval); + solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE | + EE_SHIFT_CLK | dataval); + } + + solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE); +} + +unsigned int solo_eeprom_ewen(struct solo_dev *solo_dev, int w_en) +{ + int ewen_cmd = (w_en ? 0x3f : 0) | (EE_EWEN_CMD << ADDR_LEN); + unsigned int retval = 0; + int i; + + solo_eeprom_cmd(solo_dev, ewen_cmd); + + for (i = 0; i < 16; i++) { + solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE | + EE_SHIFT_CLK); + retval = (retval << 1) | solo_eeprom_reg_read(solo_dev); + solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE); + retval = (retval << 1) | solo_eeprom_reg_read(solo_dev); + } + + solo_eeprom_reg_write(solo_dev, ~EE_CS); + retval = (retval << 1) | solo_eeprom_reg_read(solo_dev); + + return retval; +} + +unsigned short solo_eeprom_read(struct solo_dev *solo_dev, int loc) +{ + int read_cmd = loc | (EE_READ_CMD << ADDR_LEN); + unsigned short retval = 0; + int i; + + solo_eeprom_cmd(solo_dev, read_cmd); + + for (i = 0; i < 16; i++) { + solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE | + EE_SHIFT_CLK); + retval = (retval << 1) | solo_eeprom_reg_read(solo_dev); + solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE); + } + + solo_eeprom_reg_write(solo_dev, ~EE_CS); + + return retval; +} + +int solo_eeprom_write(struct solo_dev *solo_dev, int loc, + unsigned short data) +{ + int write_cmd = loc | (EE_WRITE_CMD << ADDR_LEN); + unsigned int retval; + int i; + + solo_eeprom_cmd(solo_dev, write_cmd); + + for (i = 15; i >= 0; i--) { + unsigned int dataval = (data >> i) & 1; + + solo_eeprom_reg_write(solo_dev, EE_ENB); + solo_eeprom_reg_write(solo_dev, + EE_ENB | (dataval << 1) | EE_SHIFT_CLK); + } + + solo_eeprom_reg_write(solo_dev, EE_ENB); + solo_eeprom_reg_write(solo_dev, ~EE_CS); + solo_eeprom_reg_write(solo_dev, EE_ENB); + + for (i = retval = 0; i < 10000 && !retval; i++) + retval = solo_eeprom_reg_read(solo_dev); + + solo_eeprom_reg_write(solo_dev, ~EE_CS); + + return !retval; +} |