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author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-10-19 21:19:19 +0200 |
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committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-10-19 21:19:19 +0200 |
commit | e05dacd71db0a5da7c1a44bcaab2a8a240b9c233 (patch) | |
tree | 31382cf1c7d62c03126448affb2fc86e8c4aaa8b /drivers/media/pci/cx25821/cx25821-gpio.c | |
parent | xen: arm: comment on why 64-bit xen_pfn_t is safe even on 32 bit (diff) | |
parent | Linux 3.7-rc1 (diff) | |
download | linux-e05dacd71db0a5da7c1a44bcaab2a8a240b9c233.tar.xz linux-e05dacd71db0a5da7c1a44bcaab2a8a240b9c233.zip |
Merge commit 'v3.7-rc1' into stable/for-linus-3.7
* commit 'v3.7-rc1': (10892 commits)
Linux 3.7-rc1
x86, boot: Explicitly include autoconf.h for hostprogs
perf: Fix UAPI fallout
ARM: config: make sure that platforms are ordered by option string
ARM: config: sort select statements alphanumerically
UAPI: (Scripted) Disintegrate include/linux/byteorder
UAPI: (Scripted) Disintegrate include/linux
UAPI: Unexport linux/blk_types.h
UAPI: Unexport part of linux/ppp-comp.h
perf: Handle new rbtree implementation
procfs: don't need a PATH_MAX allocation to hold a string representation of an int
vfs: embed struct filename inside of names_cache allocation if possible
audit: make audit_inode take struct filename
vfs: make path_openat take a struct filename pointer
vfs: turn do_path_lookup into wrapper around struct filename variant
audit: allow audit code to satisfy getname requests from its names_list
vfs: define struct filename and have getname() return it
btrfs: Fix compilation with user namespace support enabled
userns: Fix posix_acl_file_xattr_userns gid conversion
userns: Properly print bluetooth socket uids
...
Diffstat (limited to 'drivers/media/pci/cx25821/cx25821-gpio.c')
-rw-r--r-- | drivers/media/pci/cx25821/cx25821-gpio.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/drivers/media/pci/cx25821/cx25821-gpio.c b/drivers/media/pci/cx25821/cx25821-gpio.c new file mode 100644 index 000000000000..29e43b03c85e --- /dev/null +++ b/drivers/media/pci/cx25821/cx25821-gpio.c @@ -0,0 +1,98 @@ +/* + * Driver for the Conexant CX25821 PCIe bridge + * + * Copyright (C) 2009 Conexant Systems Inc. + * Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com> + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include "cx25821.h" + +/********************* GPIO stuffs *********************/ +void cx25821_set_gpiopin_direction(struct cx25821_dev *dev, + int pin_number, int pin_logic_value) +{ + int bit = pin_number; + u32 gpio_oe_reg = GPIO_LO_OE; + u32 gpio_register = 0; + u32 value = 0; + + /* Check for valid pinNumber */ + if (pin_number >= 47) + return; + + if (pin_number > 31) { + bit = pin_number - 31; + gpio_oe_reg = GPIO_HI_OE; + } + /* Here we will make sure that the GPIOs 0 and 1 are output. keep the + * rest as is */ + gpio_register = cx_read(gpio_oe_reg); + + if (pin_logic_value == 1) + value = gpio_register | Set_GPIO_Bit(bit); + else + value = gpio_register & Clear_GPIO_Bit(bit); + + cx_write(gpio_oe_reg, value); +} +EXPORT_SYMBOL(cx25821_set_gpiopin_direction); + +static void cx25821_set_gpiopin_logicvalue(struct cx25821_dev *dev, + int pin_number, int pin_logic_value) +{ + int bit = pin_number; + u32 gpio_reg = GPIO_LO; + u32 value = 0; + + /* Check for valid pinNumber */ + if (pin_number >= 47) + return; + + /* change to output direction */ + cx25821_set_gpiopin_direction(dev, pin_number, 0); + + if (pin_number > 31) { + bit = pin_number - 31; + gpio_reg = GPIO_HI; + } + + value = cx_read(gpio_reg); + + if (pin_logic_value == 0) + value &= Clear_GPIO_Bit(bit); + else + value |= Set_GPIO_Bit(bit); + + cx_write(gpio_reg, value); +} + +void cx25821_gpio_init(struct cx25821_dev *dev) +{ + if (dev == NULL) + return; + + switch (dev->board) { + case CX25821_BOARD_CONEXANT_ATHENA10: + default: + /* set GPIO 5 to select the path for Medusa/Athena */ + cx25821_set_gpiopin_logicvalue(dev, 5, 1); + mdelay(20); + break; + } + +} |