diff options
Diffstat (limited to 'drivers/staging/cx25821/cx25821-gpio.c')
| -rw-r--r-- | drivers/staging/cx25821/cx25821-gpio.c | 154 |
1 files changed, 68 insertions, 86 deletions
diff --git a/drivers/staging/cx25821/cx25821-gpio.c b/drivers/staging/cx25821/cx25821-gpio.c index 074c196..e8a37b4 100644 --- a/drivers/staging/cx25821/cx25821-gpio.c +++ b/drivers/staging/cx25821/cx25821-gpio.c @@ -1,116 +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" +/* + * 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) +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; + 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; + 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; + 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); - // 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) ; - } + 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 ); + cx_write(gpio_oe_reg, value); } -static void cx25821_set_gpiopin_logicvalue( struct cx25821_dev *dev, - int pin_number, - int pin_logic_value) +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; - + int bit = pin_number; + u32 gpio_reg = GPIO_LO; + u32 value = 0; // Check for valid pinNumber - if (pin_number >= 47) - return; - - cx25821_set_gpiopin_direction(dev, pin_number, 0); // change to output direction + if (pin_number >= 47) + return; + cx25821_set_gpiopin_direction(dev, pin_number, 0); // change to output direction - if ( pin_number > 31 ) - { - bit = pin_number - 31; - gpio_reg = GPIO_HI; + if (pin_number > 31) { + bit = pin_number - 31; + gpio_reg = GPIO_HI; } - value = cx_read( gpio_reg ); + value = cx_read(gpio_reg); + if (pin_logic_value == 0) { + value &= Clear_GPIO_Bit(bit); + } else { + value |= Set_GPIO_Bit(bit); + } - if (pin_logic_value == 0) - { - value &= Clear_GPIO_Bit(bit); - } - else - { - value |= Set_GPIO_Bit(bit); - } - - cx_write( gpio_reg, value); + cx_write(gpio_reg, value); } void cx25821_gpio_init(struct cx25821_dev *dev) { - if( dev == NULL ) - { - return; + 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; + 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; } } |