diff options
Diffstat (limited to 'drivers/media/usb/dvb-usb-v2/mxl111sf-gpio.c')
| -rw-r--r-- | drivers/media/usb/dvb-usb-v2/mxl111sf-gpio.c | 744 |
1 files changed, 744 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 0000000000..ef489c566b --- /dev/null +++ b/drivers/media/usb/dvb-usb-v2/mxl111sf-gpio.c @@ -0,0 +1,744 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * mxl111sf-gpio.c - driver for the MaxLinear MXL111SF + * + * Copyright (C) 2010-2014 Michael Krufky <mkrufky@linuxtv.org> + */ + +#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"); + fallthrough; + 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"); + fallthrough; + 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; +} |