drivers/media/usb/dvb-usb-v2/mxl111sf-gpio.c - linux-imx - Git at Google

 /*
  *  mxl111sf-gpio.c - driver for the MaxLinear MXL111SF
  *
  *  Copyright (C) 2010-2014 Michael Krufky <mkrufky@linuxtv.org>
  *
  *  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 "mxl111sf-gpio.h"
 #include "mxl111sf-i2c.h"
 #include "mxl111sf.h"

 /* ------------------------------------------------------------------------- */

 #define MXL_GPIO_MUX_REG_0 0x84
 #define MXL_GPIO_MUX_REG_1 0x89
 #define MXL_GPIO_MUX_REG_2 0x82

 #define MXL_GPIO_DIR_INPUT  0
 #define MXL_GPIO_DIR_OUTPUT 1


 static int mxl111sf_set_gpo_state(struct mxl111sf_state *state, u8 pin, u8 val)
 {
 	int ret;
 	u8 tmp;

 	mxl_debug_adv("(%d, %d)", pin, val);

 	if ((pin > 0) && (pin < 8)) {
 		ret = mxl111sf_read_reg(state, 0x19, &tmp);
 		if (mxl_fail(ret))
 			goto fail;
 		tmp &= ~(1 << (pin - 1));
 		tmp |= (val << (pin - 1));
 		ret = mxl111sf_write_reg(state, 0x19, tmp);
 		if (mxl_fail(ret))
 			goto fail;
 	} else if (pin <= 10) {
 		if (pin == 0)
 			pin += 7;
 		ret = mxl111sf_read_reg(state, 0x30, &tmp);
 		if (mxl_fail(ret))
 			goto fail;
 		tmp &= ~(1 << (pin - 3));
 		tmp |= (val << (pin - 3));
 		ret = mxl111sf_write_reg(state, 0x30, tmp);
 		if (mxl_fail(ret))
 			goto fail;
 	} else
 		ret = -EINVAL;
 fail:
 	return ret;
 }

 static int mxl111sf_get_gpi_state(struct mxl111sf_state *state, u8 pin, u8 *val)
 {
 	int ret;
 	u8 tmp;

 	mxl_debug("(0x%02x)", pin);

 	*val = 0;

 	switch (pin) {
 	case 0:
 	case 1:
 	case 2:
 	case 3:
 		ret = mxl111sf_read_reg(state, 0x23, &tmp);
 		if (mxl_fail(ret))
 			goto fail;
 		*val = (tmp >> (pin + 4)) & 0x01;
 		break;
 	case 4:
 	case 5:
 	case 6:
 	case 7:
 		ret = mxl111sf_read_reg(state, 0x2f, &tmp);
 		if (mxl_fail(ret))
 			goto fail;
 		*val = (tmp >> pin) & 0x01;
 		break;
 	case 8:
 	case 9:
 	case 10:
 		ret = mxl111sf_read_reg(state, 0x22, &tmp);
 		if (mxl_fail(ret))
 			goto fail;
 		*val = (tmp >> (pin - 3)) & 0x01;
 		break;
 	default:
 		return -EINVAL; /* invalid pin */
 	}
 fail:
 	return ret;
 }

 struct mxl_gpio_cfg {
 	u8 pin;
 	u8 dir;
 	u8 val;
 };

 static int mxl111sf_config_gpio_pins(struct mxl111sf_state *state,
 				     struct mxl_gpio_cfg *gpio_cfg)
 {
 	int ret;
 	u8 tmp;

 	mxl_debug_adv("(%d, %d)", gpio_cfg->pin, gpio_cfg->dir);

 	switch (gpio_cfg->pin) {
 	case 0:
 	case 1:
 	case 2:
 	case 3:
 		ret = mxl111sf_read_reg(state, MXL_GPIO_MUX_REG_0, &tmp);
 		if (mxl_fail(ret))
 			goto fail;
 		tmp &= ~(1 << (gpio_cfg->pin + 4));
 		tmp |= (gpio_cfg->dir << (gpio_cfg->pin + 4));
 		ret = mxl111sf_write_reg(state, MXL_GPIO_MUX_REG_0, tmp);
 		if (mxl_fail(ret))
 			goto fail;
 		break;
 	case 4:
 	case 5:
 	case 6:
 	case 7:
 		ret = mxl111sf_read_reg(state, MXL_GPIO_MUX_REG_1, &tmp);
 		if (mxl_fail(ret))
 			goto fail;
 		tmp &= ~(1 << gpio_cfg->pin);
 		tmp |= (gpio_cfg->dir << gpio_cfg->pin);
 		ret = mxl111sf_write_reg(state, MXL_GPIO_MUX_REG_1, tmp);
 		if (mxl_fail(ret))
 			goto fail;
 		break;
 	case 8:
 	case 9:
 	case 10:
 		ret = mxl111sf_read_reg(state, MXL_GPIO_MUX_REG_2, &tmp);
 		if (mxl_fail(ret))
 			goto fail;
 		tmp &= ~(1 << (gpio_cfg->pin - 3));
 		tmp |= (gpio_cfg->dir << (gpio_cfg->pin - 3));
 		ret = mxl111sf_write_reg(state, MXL_GPIO_MUX_REG_2, tmp);
 		if (mxl_fail(ret))
 			goto fail;
 		break;
 	default:
 		return -EINVAL; /* invalid pin */
 	}

 	ret = (MXL_GPIO_DIR_OUTPUT == gpio_cfg->dir) ?
 		mxl111sf_set_gpo_state(state,
 				       gpio_cfg->pin, gpio_cfg->val) :
 		mxl111sf_get_gpi_state(state,
 				       gpio_cfg->pin, &gpio_cfg->val);
 	mxl_fail(ret);
 fail:
 	return ret;
 }

 static int mxl111sf_hw_do_set_gpio(struct mxl111sf_state *state,
 				   int gpio, int direction, int val)
 {
 	struct mxl_gpio_cfg gpio_config = {
 		.pin = gpio,
 		.dir = direction,
 		.val = val,
 	};

 	mxl_debug("(%d, %d, %d)", gpio, direction, val);

 	return mxl111sf_config_gpio_pins(state, &gpio_config);
 }

 /* ------------------------------------------------------------------------- */

 #define PIN_MUX_MPEG_MODE_MASK          0x40   /* 0x17 <6> */
 #define PIN_MUX_MPEG_PAR_EN_MASK        0x01   /* 0x18 <0> */
 #define PIN_MUX_MPEG_SER_EN_MASK        0x02   /* 0x18 <1> */
 #define PIN_MUX_MPG_IN_MUX_MASK         0x80   /* 0x3D <7> */
 #define PIN_MUX_BT656_ENABLE_MASK       0x04   /* 0x12 <2> */
 #define PIN_MUX_I2S_ENABLE_MASK         0x40   /* 0x15 <6> */
 #define PIN_MUX_SPI_MODE_MASK           0x10   /* 0x3D <4> */
 #define PIN_MUX_MCLK_EN_CTRL_MASK       0x10   /* 0x82 <4> */
 #define PIN_MUX_MPSYN_EN_CTRL_MASK      0x20   /* 0x82 <5> */
 #define PIN_MUX_MDVAL_EN_CTRL_MASK      0x40   /* 0x82 <6> */
 #define PIN_MUX_MPERR_EN_CTRL_MASK      0x80   /* 0x82 <7> */
 #define PIN_MUX_MDAT_EN_0_MASK          0x10   /* 0x84 <4> */
 #define PIN_MUX_MDAT_EN_1_MASK          0x20   /* 0x84 <5> */
 #define PIN_MUX_MDAT_EN_2_MASK          0x40   /* 0x84 <6> */
 #define PIN_MUX_MDAT_EN_3_MASK          0x80   /* 0x84 <7> */
 #define PIN_MUX_MDAT_EN_4_MASK          0x10   /* 0x89 <4> */
 #define PIN_MUX_MDAT_EN_5_MASK          0x20   /* 0x89 <5> */
 #define PIN_MUX_MDAT_EN_6_MASK          0x40   /* 0x89 <6> */
 #define PIN_MUX_MDAT_EN_7_MASK          0x80   /* 0x89 <7> */

 int mxl111sf_config_pin_mux_modes(struct mxl111sf_state *state,
 				  enum mxl111sf_mux_config pin_mux_config)
 {
 	u8 r12, r15, r17, r18, r3D, r82, r84, r89;
 	int ret;

 	mxl_debug("(%d)", pin_mux_config);

 	ret = mxl111sf_read_reg(state, 0x17, &r17);
 	if (mxl_fail(ret))
 		goto fail;
 	ret = mxl111sf_read_reg(state, 0x18, &r18);
 	if (mxl_fail(ret))
 		goto fail;
 	ret = mxl111sf_read_reg(state, 0x12, &r12);
 	if (mxl_fail(ret))
 		goto fail;
 	ret = mxl111sf_read_reg(state, 0x15, &r15);
 	if (mxl_fail(ret))
 		goto fail;
 	ret = mxl111sf_read_reg(state, 0x82, &r82);
 	if (mxl_fail(ret))
 		goto fail;
 	ret = mxl111sf_read_reg(state, 0x84, &r84);
 	if (mxl_fail(ret))
 		goto fail;
 	ret = mxl111sf_read_reg(state, 0x89, &r89);
 	if (mxl_fail(ret))
 		goto fail;
 	ret = mxl111sf_read_reg(state, 0x3D, &r3D);
 	if (mxl_fail(ret))
 		goto fail;

 	switch (pin_mux_config) {
 	case PIN_MUX_TS_OUT_PARALLEL:
 		/* mpeg_mode = 1 */
 		r17 |= PIN_MUX_MPEG_MODE_MASK;
 		/* mpeg_par_en = 1 */
 		r18 |= PIN_MUX_MPEG_PAR_EN_MASK;
 		/* mpeg_ser_en = 0 */
 		r18 &= ~PIN_MUX_MPEG_SER_EN_MASK;
 		/* mpg_in_mux = 0 */
 		r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
 		/* bt656_enable = 0 */
 		r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
 		/* i2s_enable = 0 */
 		r15 &= ~PIN_MUX_I2S_ENABLE_MASK;
 		/* spi_mode = 0 */
 		r3D &= ~PIN_MUX_SPI_MODE_MASK;
 		/* mclk_en_ctrl = 1 */
 		r82 |= PIN_MUX_MCLK_EN_CTRL_MASK;
 		/* mperr_en_ctrl = 1 */
 		r82 |= PIN_MUX_MPERR_EN_CTRL_MASK;
 		/* mdval_en_ctrl = 1 */
 		r82 |= PIN_MUX_MDVAL_EN_CTRL_MASK;
 		/* mpsyn_en_ctrl = 1 */
 		r82 |= PIN_MUX_MPSYN_EN_CTRL_MASK;
 		/* mdat_en_ctrl[3:0] = 0xF */
 		r84 |= 0xF0;
 		/* mdat_en_ctrl[7:4] = 0xF */
 		r89 |= 0xF0;
 		break;
 	case PIN_MUX_TS_OUT_SERIAL:
 		/* mpeg_mode = 1 */
 		r17 |= PIN_MUX_MPEG_MODE_MASK;
 		/* mpeg_par_en = 0 */
 		r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
 		/* mpeg_ser_en = 1 */
 		r18 |= PIN_MUX_MPEG_SER_EN_MASK;
 		/* mpg_in_mux = 0 */
 		r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
 		/* bt656_enable = 0 */
 		r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
 		/* i2s_enable = 0 */
 		r15 &= ~PIN_MUX_I2S_ENABLE_MASK;
 		/* spi_mode = 0 */
 		r3D &= ~PIN_MUX_SPI_MODE_MASK;
 		/* mclk_en_ctrl = 1 */
 		r82 |= PIN_MUX_MCLK_EN_CTRL_MASK;
 		/* mperr_en_ctrl = 1 */
 		r82 |= PIN_MUX_MPERR_EN_CTRL_MASK;
 		/* mdval_en_ctrl = 1 */
 		r82 |= PIN_MUX_MDVAL_EN_CTRL_MASK;
 		/* mpsyn_en_ctrl = 1 */
 		r82 |= PIN_MUX_MPSYN_EN_CTRL_MASK;
 		/* mdat_en_ctrl[3:0] = 0xF */
 		r84 |= 0xF0;
 		/* mdat_en_ctrl[7:4] = 0xF */
 		r89 |= 0xF0;
 		break;
 	case PIN_MUX_GPIO_MODE:
 		/* mpeg_mode = 0 */
 		r17 &= ~PIN_MUX_MPEG_MODE_MASK;
 		/* mpeg_par_en = 0 */
 		r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
 		/* mpeg_ser_en = 0 */
 		r18 &= ~PIN_MUX_MPEG_SER_EN_MASK;
 		/* mpg_in_mux = 0 */
 		r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
 		/* bt656_enable = 0 */
 		r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
 		/* i2s_enable = 0 */
 		r15 &= ~PIN_MUX_I2S_ENABLE_MASK;
 		/* spi_mode = 0 */
 		r3D &= ~PIN_MUX_SPI_MODE_MASK;
 		/* mclk_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
 		/* mperr_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
 		/* mdval_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
 		/* mpsyn_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
 		/* mdat_en_ctrl[3:0] = 0x0 */
 		r84 &= 0x0F;
 		/* mdat_en_ctrl[7:4] = 0x0 */
 		r89 &= 0x0F;
 		break;
 	case PIN_MUX_TS_SERIAL_IN_MODE_0:
 		/* mpeg_mode = 0 */
 		r17 &= ~PIN_MUX_MPEG_MODE_MASK;
 		/* mpeg_par_en = 0 */
 		r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
 		/* mpeg_ser_en = 1 */
 		r18 |= PIN_MUX_MPEG_SER_EN_MASK;
 		/* mpg_in_mux = 0 */
 		r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
 		/* bt656_enable = 0 */
 		r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
 		/* i2s_enable = 0 */
 		r15 &= ~PIN_MUX_I2S_ENABLE_MASK;
 		/* spi_mode = 0 */
 		r3D &= ~PIN_MUX_SPI_MODE_MASK;
 		/* mclk_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
 		/* mperr_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
 		/* mdval_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
 		/* mpsyn_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
 		/* mdat_en_ctrl[3:0] = 0x0 */
 		r84 &= 0x0F;
 		/* mdat_en_ctrl[7:4] = 0x0 */
 		r89 &= 0x0F;
 		break;
 	case PIN_MUX_TS_SERIAL_IN_MODE_1:
 		/* mpeg_mode = 0 */
 		r17 &= ~PIN_MUX_MPEG_MODE_MASK;
 		/* mpeg_par_en = 0 */
 		r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
 		/* mpeg_ser_en = 1 */
 		r18 |= PIN_MUX_MPEG_SER_EN_MASK;
 		/* mpg_in_mux = 1 */
 		r3D |= PIN_MUX_MPG_IN_MUX_MASK;
 		/* bt656_enable = 0 */
 		r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
 		/* i2s_enable = 0 */
 		r15 &= ~PIN_MUX_I2S_ENABLE_MASK;
 		/* spi_mode = 0 */
 		r3D &= ~PIN_MUX_SPI_MODE_MASK;
 		/* mclk_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
 		/* mperr_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
 		/* mdval_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
 		/* mpsyn_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
 		/* mdat_en_ctrl[3:0] = 0x0 */
 		r84 &= 0x0F;
 		/* mdat_en_ctrl[7:4] = 0x0 */
 		r89 &= 0x0F;
 		break;
 	case PIN_MUX_TS_SPI_IN_MODE_1:
 		/* mpeg_mode = 0 */
 		r17 &= ~PIN_MUX_MPEG_MODE_MASK;
 		/* mpeg_par_en = 0 */
 		r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
 		/* mpeg_ser_en = 1 */
 		r18 |= PIN_MUX_MPEG_SER_EN_MASK;
 		/* mpg_in_mux = 1 */
 		r3D |= PIN_MUX_MPG_IN_MUX_MASK;
 		/* bt656_enable = 0 */
 		r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
 		/* i2s_enable = 1 */
 		r15 |= PIN_MUX_I2S_ENABLE_MASK;
 		/* spi_mode = 1 */
 		r3D |= PIN_MUX_SPI_MODE_MASK;
 		/* mclk_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
 		/* mperr_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
 		/* mdval_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
 		/* mpsyn_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
 		/* mdat_en_ctrl[3:0] = 0x0 */
 		r84 &= 0x0F;
 		/* mdat_en_ctrl[7:4] = 0x0 */
 		r89 &= 0x0F;
 		break;
 	case PIN_MUX_TS_SPI_IN_MODE_0:
 		/* mpeg_mode = 0 */
 		r17 &= ~PIN_MUX_MPEG_MODE_MASK;
 		/* mpeg_par_en = 0 */
 		r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
 		/* mpeg_ser_en = 1 */
 		r18 |= PIN_MUX_MPEG_SER_EN_MASK;
 		/* mpg_in_mux = 0 */
 		r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
 		/* bt656_enable = 0 */
 		r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
 		/* i2s_enable = 1 */
 		r15 |= PIN_MUX_I2S_ENABLE_MASK;
 		/* spi_mode = 1 */
 		r3D |= PIN_MUX_SPI_MODE_MASK;
 		/* mclk_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
 		/* mperr_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
 		/* mdval_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
 		/* mpsyn_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
 		/* mdat_en_ctrl[3:0] = 0x0 */
 		r84 &= 0x0F;
 		/* mdat_en_ctrl[7:4] = 0x0 */
 		r89 &= 0x0F;
 		break;
 	case PIN_MUX_TS_PARALLEL_IN:
 		/* mpeg_mode = 0 */
 		r17 &= ~PIN_MUX_MPEG_MODE_MASK;
 		/* mpeg_par_en = 1 */
 		r18 |= PIN_MUX_MPEG_PAR_EN_MASK;
 		/* mpeg_ser_en = 0 */
 		r18 &= ~PIN_MUX_MPEG_SER_EN_MASK;
 		/* mpg_in_mux = 0 */
 		r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
 		/* bt656_enable = 0 */
 		r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
 		/* i2s_enable = 0 */
 		r15 &= ~PIN_MUX_I2S_ENABLE_MASK;
 		/* spi_mode = 0 */
 		r3D &= ~PIN_MUX_SPI_MODE_MASK;
 		/* mclk_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
 		/* mperr_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
 		/* mdval_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
 		/* mpsyn_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
 		/* mdat_en_ctrl[3:0] = 0x0 */
 		r84 &= 0x0F;
 		/* mdat_en_ctrl[7:4] = 0x0 */
 		r89 &= 0x0F;
 		break;
 	case PIN_MUX_BT656_I2S_MODE:
 		/* mpeg_mode = 0 */
 		r17 &= ~PIN_MUX_MPEG_MODE_MASK;
 		/* mpeg_par_en = 0 */
 		r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
 		/* mpeg_ser_en = 0 */
 		r18 &= ~PIN_MUX_MPEG_SER_EN_MASK;
 		/* mpg_in_mux = 0 */
 		r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
 		/* bt656_enable = 1 */
 		r12 |= PIN_MUX_BT656_ENABLE_MASK;
 		/* i2s_enable = 1 */
 		r15 |= PIN_MUX_I2S_ENABLE_MASK;
 		/* spi_mode = 0 */
 		r3D &= ~PIN_MUX_SPI_MODE_MASK;
 		/* mclk_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
 		/* mperr_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
 		/* mdval_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
 		/* mpsyn_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
 		/* mdat_en_ctrl[3:0] = 0x0 */
 		r84 &= 0x0F;
 		/* mdat_en_ctrl[7:4] = 0x0 */
 		r89 &= 0x0F;
 		break;
 	case PIN_MUX_DEFAULT:
 	default:
 		/* mpeg_mode = 1 */
 		r17 |= PIN_MUX_MPEG_MODE_MASK;
 		/* mpeg_par_en = 0 */
 		r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
 		/* mpeg_ser_en = 0 */
 		r18 &= ~PIN_MUX_MPEG_SER_EN_MASK;
 		/* mpg_in_mux = 0 */
 		r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
 		/* bt656_enable = 0 */
 		r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
 		/* i2s_enable = 0 */
 		r15 &= ~PIN_MUX_I2S_ENABLE_MASK;
 		/* spi_mode = 0 */
 		r3D &= ~PIN_MUX_SPI_MODE_MASK;
 		/* mclk_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
 		/* mperr_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
 		/* mdval_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
 		/* mpsyn_en_ctrl = 0 */
 		r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
 		/* mdat_en_ctrl[3:0] = 0x0 */
 		r84 &= 0x0F;
 		/* mdat_en_ctrl[7:4] = 0x0 */
 		r89 &= 0x0F;
 		break;
 	}

 	ret = mxl111sf_write_reg(state, 0x17, r17);
 	if (mxl_fail(ret))
 		goto fail;
 	ret = mxl111sf_write_reg(state, 0x18, r18);
 	if (mxl_fail(ret))
 		goto fail;
 	ret = mxl111sf_write_reg(state, 0x12, r12);
 	if (mxl_fail(ret))
 		goto fail;
 	ret = mxl111sf_write_reg(state, 0x15, r15);
 	if (mxl_fail(ret))
 		goto fail;
 	ret = mxl111sf_write_reg(state, 0x82, r82);
 	if (mxl_fail(ret))
 		goto fail;
 	ret = mxl111sf_write_reg(state, 0x84, r84);
 	if (mxl_fail(ret))
 		goto fail;
 	ret = mxl111sf_write_reg(state, 0x89, r89);
 	if (mxl_fail(ret))
 		goto fail;
 	ret = mxl111sf_write_reg(state, 0x3D, r3D);
 	if (mxl_fail(ret))
 		goto fail;
 fail:
 	return ret;
 }

 /* ------------------------------------------------------------------------- */

 static int mxl111sf_hw_set_gpio(struct mxl111sf_state *state, int gpio, int val)
 {
 	return mxl111sf_hw_do_set_gpio(state, gpio, MXL_GPIO_DIR_OUTPUT, val);
 }

 static int mxl111sf_hw_gpio_initialize(struct mxl111sf_state *state)
 {
 	u8 gpioval = 0x07; /* write protect enabled, signal LEDs off */
 	int i, ret;

 	mxl_debug("()");

 	for (i = 3; i < 8; i++) {
 		ret = mxl111sf_hw_set_gpio(state, i, (gpioval >> i) & 0x01);
 		if (mxl_fail(ret))
 			break;
 	}

 	return ret;
 }

 #define PCA9534_I2C_ADDR (0x40 >> 1)
 static int pca9534_set_gpio(struct mxl111sf_state *state, int gpio, int val)
 {
 	u8 w[2] = { 1, 0 };
 	u8 r = 0;
 	struct i2c_msg msg[] = {
 		{ .addr = PCA9534_I2C_ADDR,
 		  .flags = 0, .buf = w, .len = 1 },
 		{ .addr = PCA9534_I2C_ADDR,
 		  .flags = I2C_M_RD, .buf = &r, .len = 1 },
 	};

 	mxl_debug("(%d, %d)", gpio, val);

 	/* read current GPIO levels from flip-flop */
 	i2c_transfer(&state->d->i2c_adap, msg, 2);

 	/* prepare write buffer with current GPIO levels */
 	msg[0].len = 2;
 #if 0
 	w[0] = 1;
 #endif
 	w[1] = r;

 	/* clear the desired GPIO */
 	w[1] &= ~(1 << gpio);

 	/* set the desired GPIO value */
 	w[1] |= ((val ? 1 : 0) << gpio);

 	/* write new GPIO levels to flip-flop */
 	i2c_transfer(&state->d->i2c_adap, &msg[0], 1);

 	return 0;
 }

 static int pca9534_init_port_expander(struct mxl111sf_state *state)
 {
 	u8 w[2] = { 1, 0x07 }; /* write protect enabled, signal LEDs off */

 	struct i2c_msg msg = {
 		.addr = PCA9534_I2C_ADDR,
 		.flags = 0, .buf = w, .len = 2
 	};

 	mxl_debug("()");

 	i2c_transfer(&state->d->i2c_adap, &msg, 1);

 	/* configure all pins as outputs */
 	w[0] = 3;
 	w[1] = 0;

 	i2c_transfer(&state->d->i2c_adap, &msg, 1);

 	return 0;
 }

 int mxl111sf_set_gpio(struct mxl111sf_state *state, int gpio, int val)
 {
 	mxl_debug("(%d, %d)", gpio, val);

 	switch (state->gpio_port_expander) {
 	default:
 		mxl_printk(KERN_ERR,
 			   "gpio_port_expander undefined, assuming PCA9534");
 		/* fall-thru */
 	case mxl111sf_PCA9534:
 		return pca9534_set_gpio(state, gpio, val);
 	case mxl111sf_gpio_hw:
 		return mxl111sf_hw_set_gpio(state, gpio, val);
 	}
 }

 static int mxl111sf_probe_port_expander(struct mxl111sf_state *state)
 {
 	int ret;
 	u8 w = 1;
 	u8 r = 0;
 	struct i2c_msg msg[] = {
 		{ .flags = 0,        .buf = &w, .len = 1 },
 		{ .flags = I2C_M_RD, .buf = &r, .len = 1 },
 	};

 	mxl_debug("()");

 	msg[0].addr = 0x70 >> 1;
 	msg[1].addr = 0x70 >> 1;

 	/* read current GPIO levels from flip-flop */
 	ret = i2c_transfer(&state->d->i2c_adap, msg, 2);
 	if (ret == 2) {
 		state->port_expander_addr = msg[0].addr;
 		state->gpio_port_expander = mxl111sf_PCA9534;
 		mxl_debug("found port expander at 0x%02x",
 			  state->port_expander_addr);
 		return 0;
 	}

 	msg[0].addr = 0x40 >> 1;
 	msg[1].addr = 0x40 >> 1;

 	ret = i2c_transfer(&state->d->i2c_adap, msg, 2);
 	if (ret == 2) {
 		state->port_expander_addr = msg[0].addr;
 		state->gpio_port_expander = mxl111sf_PCA9534;
 		mxl_debug("found port expander at 0x%02x",
 			  state->port_expander_addr);
 		return 0;
 	}
 	state->port_expander_addr = 0xff;
 	state->gpio_port_expander = mxl111sf_gpio_hw;
 	mxl_debug("using hardware gpio");
 	return 0;
 }

 int mxl111sf_init_port_expander(struct mxl111sf_state *state)
 {
 	mxl_debug("()");

 	if (0x00 == state->port_expander_addr)
 		mxl111sf_probe_port_expander(state);

 	switch (state->gpio_port_expander) {
 	default:
 		mxl_printk(KERN_ERR,
 			   "gpio_port_expander undefined, assuming PCA9534");
 		/* fall-thru */
 	case mxl111sf_PCA9534:
 		return pca9534_init_port_expander(state);
 	case mxl111sf_gpio_hw:
 		return mxl111sf_hw_gpio_initialize(state);
 	}
 }

 /* ------------------------------------------------------------------------ */

 int mxl111sf_gpio_mode_switch(struct mxl111sf_state *state, unsigned int mode)
 {
 /*	GPO:
  *	3 - ATSC/MH#   | 1 = ATSC transport, 0 = MH transport      | default 0
  *	4 - ATSC_RST## | 1 = ATSC enable, 0 = ATSC Reset           | default 0
  *	5 - ATSC_EN    | 1 = ATSC power enable, 0 = ATSC power off | default 0
  *	6 - MH_RESET#  | 1 = MH enable, 0 = MH Reset               | default 0
  *	7 - MH_EN      | 1 = MH power enable, 0 = MH power off     | default 0
  */
 	mxl_debug("(%d)", mode);

 	switch (mode) {
 	case MXL111SF_GPIO_MOD_MH:
 		mxl111sf_set_gpio(state, 4, 0);
 		mxl111sf_set_gpio(state, 5, 0);
 		msleep(50);
 		mxl111sf_set_gpio(state, 7, 1);
 		msleep(50);
 		mxl111sf_set_gpio(state, 6, 1);
 		msleep(50);

 		mxl111sf_set_gpio(state, 3, 0);
 		break;
 	case MXL111SF_GPIO_MOD_ATSC:
 		mxl111sf_set_gpio(state, 6, 0);
 		mxl111sf_set_gpio(state, 7, 0);
 		msleep(50);
 		mxl111sf_set_gpio(state, 5, 1);
 		msleep(50);
 		mxl111sf_set_gpio(state, 4, 1);
 		msleep(50);
 		mxl111sf_set_gpio(state, 3, 1);
 		break;
 	default: /* DVBT / STANDBY */
 		mxl111sf_init_port_expander(state);
 		break;
 	}
 	return 0;
 }
	/*
	* mxl111sf-gpio.c - driver for the MaxLinear MXL111SF
	*
	* Copyright (C) 2010-2014 Michael Krufky <mkrufky@linuxtv.org>
	*
	* 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 "mxl111sf-gpio.h"
	#include "mxl111sf-i2c.h"
	#include "mxl111sf.h"

	/* ------------------------------------------------------------------------- */

	#define MXL_GPIO_MUX_REG_0 0x84
	#define MXL_GPIO_MUX_REG_1 0x89
	#define MXL_GPIO_MUX_REG_2 0x82

	#define MXL_GPIO_DIR_INPUT 0
	#define MXL_GPIO_DIR_OUTPUT 1


	static int mxl111sf_set_gpo_state(struct mxl111sf_state *state, u8 pin, u8 val)
	{
	int ret;
	u8 tmp;

	mxl_debug_adv("(%d, %d)", pin, val);

	if ((pin > 0) && (pin < 8)) {
	ret = mxl111sf_read_reg(state, 0x19, &tmp);
	if (mxl_fail(ret))
	goto fail;
	tmp &= ~(1 << (pin - 1));
	tmp \|= (val << (pin - 1));
	ret = mxl111sf_write_reg(state, 0x19, tmp);
	if (mxl_fail(ret))
	goto fail;
	} else if (pin <= 10) {
	if (pin == 0)
	pin += 7;
	ret = mxl111sf_read_reg(state, 0x30, &tmp);
	if (mxl_fail(ret))
	goto fail;
	tmp &= ~(1 << (pin - 3));
	tmp \|= (val << (pin - 3));
	ret = mxl111sf_write_reg(state, 0x30, tmp);
	if (mxl_fail(ret))
	goto fail;
	} else
	ret = -EINVAL;
	fail:
	return ret;
	}

	static int mxl111sf_get_gpi_state(struct mxl111sf_state state, u8 pin, u8 val)
	{
	int ret;
	u8 tmp;

	mxl_debug("(0x%02x)", pin);

	*val = 0;

	switch (pin) {
	case 0:
	case 1:
	case 2:
	case 3:
	ret = mxl111sf_read_reg(state, 0x23, &tmp);
	if (mxl_fail(ret))
	goto fail;
	*val = (tmp >> (pin + 4)) & 0x01;
	break;
	case 4:
	case 5:
	case 6:
	case 7:
	ret = mxl111sf_read_reg(state, 0x2f, &tmp);
	if (mxl_fail(ret))
	goto fail;
	*val = (tmp >> pin) & 0x01;
	break;
	case 8:
	case 9:
	case 10:
	ret = mxl111sf_read_reg(state, 0x22, &tmp);
	if (mxl_fail(ret))
	goto fail;
	*val = (tmp >> (pin - 3)) & 0x01;
	break;
	default:
	return -EINVAL; /* invalid pin */
	}
	fail:
	return ret;
	}

	struct mxl_gpio_cfg {
	u8 pin;
	u8 dir;
	u8 val;
	};

	static int mxl111sf_config_gpio_pins(struct mxl111sf_state *state,
	struct mxl_gpio_cfg *gpio_cfg)
	{
	int ret;
	u8 tmp;

	mxl_debug_adv("(%d, %d)", gpio_cfg->pin, gpio_cfg->dir);

	switch (gpio_cfg->pin) {
	case 0:
	case 1:
	case 2:
	case 3:
	ret = mxl111sf_read_reg(state, MXL_GPIO_MUX_REG_0, &tmp);
	if (mxl_fail(ret))
	goto fail;
	tmp &= ~(1 << (gpio_cfg->pin + 4));
	tmp \|= (gpio_cfg->dir << (gpio_cfg->pin + 4));
	ret = mxl111sf_write_reg(state, MXL_GPIO_MUX_REG_0, tmp);
	if (mxl_fail(ret))
	goto fail;
	break;
	case 4:
	case 5:
	case 6:
	case 7:
	ret = mxl111sf_read_reg(state, MXL_GPIO_MUX_REG_1, &tmp);
	if (mxl_fail(ret))
	goto fail;
	tmp &= ~(1 << gpio_cfg->pin);
	tmp \|= (gpio_cfg->dir << gpio_cfg->pin);
	ret = mxl111sf_write_reg(state, MXL_GPIO_MUX_REG_1, tmp);
	if (mxl_fail(ret))
	goto fail;
	break;
	case 8:
	case 9:
	case 10:
	ret = mxl111sf_read_reg(state, MXL_GPIO_MUX_REG_2, &tmp);
	if (mxl_fail(ret))
	goto fail;
	tmp &= ~(1 << (gpio_cfg->pin - 3));
	tmp \|= (gpio_cfg->dir << (gpio_cfg->pin - 3));
	ret = mxl111sf_write_reg(state, MXL_GPIO_MUX_REG_2, tmp);
	if (mxl_fail(ret))
	goto fail;
	break;
	default:
	return -EINVAL; /* invalid pin */
	}

	ret = (MXL_GPIO_DIR_OUTPUT == gpio_cfg->dir) ?
	mxl111sf_set_gpo_state(state,
	gpio_cfg->pin, gpio_cfg->val) :
	mxl111sf_get_gpi_state(state,
	gpio_cfg->pin, &gpio_cfg->val);
	mxl_fail(ret);
	fail:
	return ret;
	}

	static int mxl111sf_hw_do_set_gpio(struct mxl111sf_state *state,
	int gpio, int direction, int val)
	{
	struct mxl_gpio_cfg gpio_config = {
	.pin = gpio,
	.dir = direction,
	.val = val,
	};

	mxl_debug("(%d, %d, %d)", gpio, direction, val);

	return mxl111sf_config_gpio_pins(state, &gpio_config);
	}

	/* ------------------------------------------------------------------------- */

	#define PIN_MUX_MPEG_MODE_MASK 0x40 /* 0x17 <6> */
	#define PIN_MUX_MPEG_PAR_EN_MASK 0x01 /* 0x18 <0> */
	#define PIN_MUX_MPEG_SER_EN_MASK 0x02 /* 0x18 <1> */
	#define PIN_MUX_MPG_IN_MUX_MASK 0x80 /* 0x3D <7> */
	#define PIN_MUX_BT656_ENABLE_MASK 0x04 /* 0x12 <2> */
	#define PIN_MUX_I2S_ENABLE_MASK 0x40 /* 0x15 <6> */
	#define PIN_MUX_SPI_MODE_MASK 0x10 /* 0x3D <4> */
	#define PIN_MUX_MCLK_EN_CTRL_MASK 0x10 /* 0x82 <4> */
	#define PIN_MUX_MPSYN_EN_CTRL_MASK 0x20 /* 0x82 <5> */
	#define PIN_MUX_MDVAL_EN_CTRL_MASK 0x40 /* 0x82 <6> */
	#define PIN_MUX_MPERR_EN_CTRL_MASK 0x80 /* 0x82 <7> */
	#define PIN_MUX_MDAT_EN_0_MASK 0x10 /* 0x84 <4> */
	#define PIN_MUX_MDAT_EN_1_MASK 0x20 /* 0x84 <5> */
	#define PIN_MUX_MDAT_EN_2_MASK 0x40 /* 0x84 <6> */
	#define PIN_MUX_MDAT_EN_3_MASK 0x80 /* 0x84 <7> */
	#define PIN_MUX_MDAT_EN_4_MASK 0x10 /* 0x89 <4> */
	#define PIN_MUX_MDAT_EN_5_MASK 0x20 /* 0x89 <5> */
	#define PIN_MUX_MDAT_EN_6_MASK 0x40 /* 0x89 <6> */
	#define PIN_MUX_MDAT_EN_7_MASK 0x80 /* 0x89 <7> */

	int mxl111sf_config_pin_mux_modes(struct mxl111sf_state *state,
	enum mxl111sf_mux_config pin_mux_config)
	{
	u8 r12, r15, r17, r18, r3D, r82, r84, r89;
	int ret;

	mxl_debug("(%d)", pin_mux_config);

	ret = mxl111sf_read_reg(state, 0x17, &r17);
	if (mxl_fail(ret))
	goto fail;
	ret = mxl111sf_read_reg(state, 0x18, &r18);
	if (mxl_fail(ret))
	goto fail;
	ret = mxl111sf_read_reg(state, 0x12, &r12);
	if (mxl_fail(ret))
	goto fail;
	ret = mxl111sf_read_reg(state, 0x15, &r15);
	if (mxl_fail(ret))
	goto fail;
	ret = mxl111sf_read_reg(state, 0x82, &r82);
	if (mxl_fail(ret))
	goto fail;
	ret = mxl111sf_read_reg(state, 0x84, &r84);
	if (mxl_fail(ret))
	goto fail;
	ret = mxl111sf_read_reg(state, 0x89, &r89);
	if (mxl_fail(ret))
	goto fail;
	ret = mxl111sf_read_reg(state, 0x3D, &r3D);
	if (mxl_fail(ret))
	goto fail;

	switch (pin_mux_config) {
	case PIN_MUX_TS_OUT_PARALLEL:
	/* mpeg_mode = 1 */
	r17 \|= PIN_MUX_MPEG_MODE_MASK;
	/* mpeg_par_en = 1 */
	r18 \|= PIN_MUX_MPEG_PAR_EN_MASK;
	/* mpeg_ser_en = 0 */
	r18 &= ~PIN_MUX_MPEG_SER_EN_MASK;
	/* mpg_in_mux = 0 */
	r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
	/* bt656_enable = 0 */
	r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
	/* i2s_enable = 0 */
	r15 &= ~PIN_MUX_I2S_ENABLE_MASK;
	/* spi_mode = 0 */
	r3D &= ~PIN_MUX_SPI_MODE_MASK;
	/* mclk_en_ctrl = 1 */
	r82 \|= PIN_MUX_MCLK_EN_CTRL_MASK;
	/* mperr_en_ctrl = 1 */
	r82 \|= PIN_MUX_MPERR_EN_CTRL_MASK;
	/* mdval_en_ctrl = 1 */
	r82 \|= PIN_MUX_MDVAL_EN_CTRL_MASK;
	/* mpsyn_en_ctrl = 1 */
	r82 \|= PIN_MUX_MPSYN_EN_CTRL_MASK;
	/* mdat_en_ctrl[3:0] = 0xF */
	r84 \|= 0xF0;
	/* mdat_en_ctrl[7:4] = 0xF */
	r89 \|= 0xF0;
	break;
	case PIN_MUX_TS_OUT_SERIAL:
	/* mpeg_mode = 1 */
	r17 \|= PIN_MUX_MPEG_MODE_MASK;
	/* mpeg_par_en = 0 */
	r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
	/* mpeg_ser_en = 1 */
	r18 \|= PIN_MUX_MPEG_SER_EN_MASK;
	/* mpg_in_mux = 0 */
	r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
	/* bt656_enable = 0 */
	r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
	/* i2s_enable = 0 */
	r15 &= ~PIN_MUX_I2S_ENABLE_MASK;
	/* spi_mode = 0 */
	r3D &= ~PIN_MUX_SPI_MODE_MASK;
	/* mclk_en_ctrl = 1 */
	r82 \|= PIN_MUX_MCLK_EN_CTRL_MASK;
	/* mperr_en_ctrl = 1 */
	r82 \|= PIN_MUX_MPERR_EN_CTRL_MASK;
	/* mdval_en_ctrl = 1 */
	r82 \|= PIN_MUX_MDVAL_EN_CTRL_MASK;
	/* mpsyn_en_ctrl = 1 */
	r82 \|= PIN_MUX_MPSYN_EN_CTRL_MASK;
	/* mdat_en_ctrl[3:0] = 0xF */
	r84 \|= 0xF0;
	/* mdat_en_ctrl[7:4] = 0xF */
	r89 \|= 0xF0;
	break;
	case PIN_MUX_GPIO_MODE:
	/* mpeg_mode = 0 */
	r17 &= ~PIN_MUX_MPEG_MODE_MASK;
	/* mpeg_par_en = 0 */
	r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
	/* mpeg_ser_en = 0 */
	r18 &= ~PIN_MUX_MPEG_SER_EN_MASK;
	/* mpg_in_mux = 0 */
	r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
	/* bt656_enable = 0 */
	r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
	/* i2s_enable = 0 */
	r15 &= ~PIN_MUX_I2S_ENABLE_MASK;
	/* spi_mode = 0 */
	r3D &= ~PIN_MUX_SPI_MODE_MASK;
	/* mclk_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
	/* mperr_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
	/* mdval_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
	/* mpsyn_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
	/* mdat_en_ctrl[3:0] = 0x0 */
	r84 &= 0x0F;
	/* mdat_en_ctrl[7:4] = 0x0 */
	r89 &= 0x0F;
	break;
	case PIN_MUX_TS_SERIAL_IN_MODE_0:
	/* mpeg_mode = 0 */
	r17 &= ~PIN_MUX_MPEG_MODE_MASK;
	/* mpeg_par_en = 0 */
	r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
	/* mpeg_ser_en = 1 */
	r18 \|= PIN_MUX_MPEG_SER_EN_MASK;
	/* mpg_in_mux = 0 */
	r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
	/* bt656_enable = 0 */
	r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
	/* i2s_enable = 0 */
	r15 &= ~PIN_MUX_I2S_ENABLE_MASK;
	/* spi_mode = 0 */
	r3D &= ~PIN_MUX_SPI_MODE_MASK;
	/* mclk_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
	/* mperr_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
	/* mdval_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
	/* mpsyn_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
	/* mdat_en_ctrl[3:0] = 0x0 */
	r84 &= 0x0F;
	/* mdat_en_ctrl[7:4] = 0x0 */
	r89 &= 0x0F;
	break;
	case PIN_MUX_TS_SERIAL_IN_MODE_1:
	/* mpeg_mode = 0 */
	r17 &= ~PIN_MUX_MPEG_MODE_MASK;
	/* mpeg_par_en = 0 */
	r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
	/* mpeg_ser_en = 1 */
	r18 \|= PIN_MUX_MPEG_SER_EN_MASK;
	/* mpg_in_mux = 1 */
	r3D \|= PIN_MUX_MPG_IN_MUX_MASK;
	/* bt656_enable = 0 */
	r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
	/* i2s_enable = 0 */
	r15 &= ~PIN_MUX_I2S_ENABLE_MASK;
	/* spi_mode = 0 */
	r3D &= ~PIN_MUX_SPI_MODE_MASK;
	/* mclk_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
	/* mperr_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
	/* mdval_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
	/* mpsyn_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
	/* mdat_en_ctrl[3:0] = 0x0 */
	r84 &= 0x0F;
	/* mdat_en_ctrl[7:4] = 0x0 */
	r89 &= 0x0F;
	break;
	case PIN_MUX_TS_SPI_IN_MODE_1:
	/* mpeg_mode = 0 */
	r17 &= ~PIN_MUX_MPEG_MODE_MASK;
	/* mpeg_par_en = 0 */
	r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
	/* mpeg_ser_en = 1 */
	r18 \|= PIN_MUX_MPEG_SER_EN_MASK;
	/* mpg_in_mux = 1 */
	r3D \|= PIN_MUX_MPG_IN_MUX_MASK;
	/* bt656_enable = 0 */
	r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
	/* i2s_enable = 1 */
	r15 \|= PIN_MUX_I2S_ENABLE_MASK;
	/* spi_mode = 1 */
	r3D \|= PIN_MUX_SPI_MODE_MASK;
	/* mclk_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
	/* mperr_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
	/* mdval_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
	/* mpsyn_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
	/* mdat_en_ctrl[3:0] = 0x0 */
	r84 &= 0x0F;
	/* mdat_en_ctrl[7:4] = 0x0 */
	r89 &= 0x0F;
	break;
	case PIN_MUX_TS_SPI_IN_MODE_0:
	/* mpeg_mode = 0 */
	r17 &= ~PIN_MUX_MPEG_MODE_MASK;
	/* mpeg_par_en = 0 */
	r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
	/* mpeg_ser_en = 1 */
	r18 \|= PIN_MUX_MPEG_SER_EN_MASK;
	/* mpg_in_mux = 0 */
	r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
	/* bt656_enable = 0 */
	r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
	/* i2s_enable = 1 */
	r15 \|= PIN_MUX_I2S_ENABLE_MASK;
	/* spi_mode = 1 */
	r3D \|= PIN_MUX_SPI_MODE_MASK;
	/* mclk_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
	/* mperr_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
	/* mdval_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
	/* mpsyn_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
	/* mdat_en_ctrl[3:0] = 0x0 */
	r84 &= 0x0F;
	/* mdat_en_ctrl[7:4] = 0x0 */
	r89 &= 0x0F;
	break;
	case PIN_MUX_TS_PARALLEL_IN:
	/* mpeg_mode = 0 */
	r17 &= ~PIN_MUX_MPEG_MODE_MASK;
	/* mpeg_par_en = 1 */
	r18 \|= PIN_MUX_MPEG_PAR_EN_MASK;
	/* mpeg_ser_en = 0 */
	r18 &= ~PIN_MUX_MPEG_SER_EN_MASK;
	/* mpg_in_mux = 0 */
	r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
	/* bt656_enable = 0 */
	r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
	/* i2s_enable = 0 */
	r15 &= ~PIN_MUX_I2S_ENABLE_MASK;
	/* spi_mode = 0 */
	r3D &= ~PIN_MUX_SPI_MODE_MASK;
	/* mclk_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
	/* mperr_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
	/* mdval_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
	/* mpsyn_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
	/* mdat_en_ctrl[3:0] = 0x0 */
	r84 &= 0x0F;
	/* mdat_en_ctrl[7:4] = 0x0 */
	r89 &= 0x0F;
	break;
	case PIN_MUX_BT656_I2S_MODE:
	/* mpeg_mode = 0 */
	r17 &= ~PIN_MUX_MPEG_MODE_MASK;
	/* mpeg_par_en = 0 */
	r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
	/* mpeg_ser_en = 0 */
	r18 &= ~PIN_MUX_MPEG_SER_EN_MASK;
	/* mpg_in_mux = 0 */
	r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
	/* bt656_enable = 1 */
	r12 \|= PIN_MUX_BT656_ENABLE_MASK;
	/* i2s_enable = 1 */
	r15 \|= PIN_MUX_I2S_ENABLE_MASK;
	/* spi_mode = 0 */
	r3D &= ~PIN_MUX_SPI_MODE_MASK;
	/* mclk_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
	/* mperr_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
	/* mdval_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
	/* mpsyn_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
	/* mdat_en_ctrl[3:0] = 0x0 */
	r84 &= 0x0F;
	/* mdat_en_ctrl[7:4] = 0x0 */
	r89 &= 0x0F;
	break;
	case PIN_MUX_DEFAULT:
	default:
	/* mpeg_mode = 1 */
	r17 \|= PIN_MUX_MPEG_MODE_MASK;
	/* mpeg_par_en = 0 */
	r18 &= ~PIN_MUX_MPEG_PAR_EN_MASK;
	/* mpeg_ser_en = 0 */
	r18 &= ~PIN_MUX_MPEG_SER_EN_MASK;
	/* mpg_in_mux = 0 */
	r3D &= ~PIN_MUX_MPG_IN_MUX_MASK;
	/* bt656_enable = 0 */
	r12 &= ~PIN_MUX_BT656_ENABLE_MASK;
	/* i2s_enable = 0 */
	r15 &= ~PIN_MUX_I2S_ENABLE_MASK;
	/* spi_mode = 0 */
	r3D &= ~PIN_MUX_SPI_MODE_MASK;
	/* mclk_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MCLK_EN_CTRL_MASK;
	/* mperr_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPERR_EN_CTRL_MASK;
	/* mdval_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MDVAL_EN_CTRL_MASK;
	/* mpsyn_en_ctrl = 0 */
	r82 &= ~PIN_MUX_MPSYN_EN_CTRL_MASK;
	/* mdat_en_ctrl[3:0] = 0x0 */
	r84 &= 0x0F;
	/* mdat_en_ctrl[7:4] = 0x0 */
	r89 &= 0x0F;
	break;
	}

	ret = mxl111sf_write_reg(state, 0x17, r17);
	if (mxl_fail(ret))
	goto fail;
	ret = mxl111sf_write_reg(state, 0x18, r18);
	if (mxl_fail(ret))
	goto fail;
	ret = mxl111sf_write_reg(state, 0x12, r12);
	if (mxl_fail(ret))
	goto fail;
	ret = mxl111sf_write_reg(state, 0x15, r15);
	if (mxl_fail(ret))
	goto fail;
	ret = mxl111sf_write_reg(state, 0x82, r82);
	if (mxl_fail(ret))
	goto fail;
	ret = mxl111sf_write_reg(state, 0x84, r84);
	if (mxl_fail(ret))
	goto fail;
	ret = mxl111sf_write_reg(state, 0x89, r89);
	if (mxl_fail(ret))
	goto fail;
	ret = mxl111sf_write_reg(state, 0x3D, r3D);
	if (mxl_fail(ret))
	goto fail;
	fail:
	return ret;
	}

	/* ------------------------------------------------------------------------- */

	static int mxl111sf_hw_set_gpio(struct mxl111sf_state *state, int gpio, int val)
	{
	return mxl111sf_hw_do_set_gpio(state, gpio, MXL_GPIO_DIR_OUTPUT, val);
	}

	static int mxl111sf_hw_gpio_initialize(struct mxl111sf_state *state)
	{
	u8 gpioval = 0x07; /* write protect enabled, signal LEDs off */
	int i, ret;

	mxl_debug("()");

	for (i = 3; i < 8; i++) {
	ret = mxl111sf_hw_set_gpio(state, i, (gpioval >> i) & 0x01);
	if (mxl_fail(ret))
	break;
	}

	return ret;
	}

	#define PCA9534_I2C_ADDR (0x40 >> 1)
	static int pca9534_set_gpio(struct mxl111sf_state *state, int gpio, int val)
	{
	u8 w[2] = { 1, 0 };
	u8 r = 0;
	struct i2c_msg msg[] = {
	{ .addr = PCA9534_I2C_ADDR,
	.flags = 0, .buf = w, .len = 1 },
	{ .addr = PCA9534_I2C_ADDR,
	.flags = I2C_M_RD, .buf = &r, .len = 1 },
	};

	mxl_debug("(%d, %d)", gpio, val);

	/* read current GPIO levels from flip-flop */
	i2c_transfer(&state->d->i2c_adap, msg, 2);

	/* prepare write buffer with current GPIO levels */
	msg[0].len = 2;
	#if 0
	w[0] = 1;
	#endif
	w[1] = r;

	/* clear the desired GPIO */
	w[1] &= ~(1 << gpio);

	/* set the desired GPIO value */
	w[1] \|= ((val ? 1 : 0) << gpio);

	/* write new GPIO levels to flip-flop */
	i2c_transfer(&state->d->i2c_adap, &msg[0], 1);

	return 0;
	}

	static int pca9534_init_port_expander(struct mxl111sf_state *state)
	{
	u8 w[2] = { 1, 0x07 }; /* write protect enabled, signal LEDs off */

	struct i2c_msg msg = {
	.addr = PCA9534_I2C_ADDR,
	.flags = 0, .buf = w, .len = 2
	};

	mxl_debug("()");

	i2c_transfer(&state->d->i2c_adap, &msg, 1);

	/* configure all pins as outputs */
	w[0] = 3;
	w[1] = 0;

	i2c_transfer(&state->d->i2c_adap, &msg, 1);

	return 0;
	}

	int mxl111sf_set_gpio(struct mxl111sf_state *state, int gpio, int val)
	{
	mxl_debug("(%d, %d)", gpio, val);

	switch (state->gpio_port_expander) {
	default:
	mxl_printk(KERN_ERR,
	"gpio_port_expander undefined, assuming PCA9534");
	/* fall-thru */
	case mxl111sf_PCA9534:
	return pca9534_set_gpio(state, gpio, val);
	case mxl111sf_gpio_hw:
	return mxl111sf_hw_set_gpio(state, gpio, val);
	}
	}

	static int mxl111sf_probe_port_expander(struct mxl111sf_state *state)
	{
	int ret;
	u8 w = 1;
	u8 r = 0;
	struct i2c_msg msg[] = {
	{ .flags = 0, .buf = &w, .len = 1 },
	{ .flags = I2C_M_RD, .buf = &r, .len = 1 },
	};

	mxl_debug("()");

	msg[0].addr = 0x70 >> 1;
	msg[1].addr = 0x70 >> 1;

	/* read current GPIO levels from flip-flop */
	ret = i2c_transfer(&state->d->i2c_adap, msg, 2);
	if (ret == 2) {
	state->port_expander_addr = msg[0].addr;
	state->gpio_port_expander = mxl111sf_PCA9534;
	mxl_debug("found port expander at 0x%02x",
	state->port_expander_addr);
	return 0;
	}

	msg[0].addr = 0x40 >> 1;
	msg[1].addr = 0x40 >> 1;

	ret = i2c_transfer(&state->d->i2c_adap, msg, 2);
	if (ret == 2) {
	state->port_expander_addr = msg[0].addr;
	state->gpio_port_expander = mxl111sf_PCA9534;
	mxl_debug("found port expander at 0x%02x",
	state->port_expander_addr);
	return 0;
	}
	state->port_expander_addr = 0xff;
	state->gpio_port_expander = mxl111sf_gpio_hw;
	mxl_debug("using hardware gpio");
	return 0;
	}

	int mxl111sf_init_port_expander(struct mxl111sf_state *state)
	{
	mxl_debug("()");

	if (0x00 == state->port_expander_addr)
	mxl111sf_probe_port_expander(state);

	switch (state->gpio_port_expander) {
	default:
	mxl_printk(KERN_ERR,
	"gpio_port_expander undefined, assuming PCA9534");
	/* fall-thru */
	case mxl111sf_PCA9534:
	return pca9534_init_port_expander(state);
	case mxl111sf_gpio_hw:
	return mxl111sf_hw_gpio_initialize(state);
	}
	}

	/* ------------------------------------------------------------------------ */

	int mxl111sf_gpio_mode_switch(struct mxl111sf_state *state, unsigned int mode)
	{
	/* GPO:
	* 3 - ATSC/MH# \| 1 = ATSC transport, 0 = MH transport \| default 0
	* 4 - ATSC_RST## \| 1 = ATSC enable, 0 = ATSC Reset \| default 0
	* 5 - ATSC_EN \| 1 = ATSC power enable, 0 = ATSC power off \| default 0
	* 6 - MH_RESET# \| 1 = MH enable, 0 = MH Reset \| default 0
	* 7 - MH_EN \| 1 = MH power enable, 0 = MH power off \| default 0
	*/
	mxl_debug("(%d)", mode);

	switch (mode) {
	case MXL111SF_GPIO_MOD_MH:
	mxl111sf_set_gpio(state, 4, 0);
	mxl111sf_set_gpio(state, 5, 0);
	msleep(50);
	mxl111sf_set_gpio(state, 7, 1);
	msleep(50);
	mxl111sf_set_gpio(state, 6, 1);
	msleep(50);

	mxl111sf_set_gpio(state, 3, 0);
	break;
	case MXL111SF_GPIO_MOD_ATSC:
	mxl111sf_set_gpio(state, 6, 0);
	mxl111sf_set_gpio(state, 7, 0);
	msleep(50);
	mxl111sf_set_gpio(state, 5, 1);
	msleep(50);
	mxl111sf_set_gpio(state, 4, 1);
	msleep(50);
	mxl111sf_set_gpio(state, 3, 1);
	break;
	default: /* DVBT / STANDBY */
	mxl111sf_init_port_expander(state);
	break;
	}
	return 0;
	}