Initial import

1 files changed, 757 insertions, 0 deletions

diff --git a/drivers/media/usb/dvb-usb-v2/mxl111sf-gpio.c b/drivers/media/usb/dvb-usb-v2/mxl111sf-gpio.c
new file mode 100644
index 000000000..2180c13a6
--- /dev/null
+++ b/drivers/media/usb/dvb-usb-v2/mxl111sf-gpio.c
@@ -0,0 +1,757 @@
+/*
+ *  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;
+}