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Diffstat (limited to '')
| -rw-r--r-- | drivers/media/i2c/tc358743.c | 2217 |
1 files changed, 2217 insertions, 0 deletions
diff --git a/drivers/media/i2c/tc358743.c b/drivers/media/i2c/tc358743.c new file mode 100644 index 000000000..200841c1f --- /dev/null +++ b/drivers/media/i2c/tc358743.c @@ -0,0 +1,2217 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * tc358743 - Toshiba HDMI to CSI-2 bridge + * + * Copyright 2015 Cisco Systems, Inc. and/or its affiliates. All rights + * reserved. + */ + +/* + * References (c = chapter, p = page): + * REF_01 - Toshiba, TC358743XBG (H2C), Functional Specification, Rev 0.60 + * REF_02 - Toshiba, TC358743XBG_HDMI-CSI_Tv11p_nm.xls + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/interrupt.h> +#include <linux/timer.h> +#include <linux/of_graph.h> +#include <linux/videodev2.h> +#include <linux/workqueue.h> +#include <linux/v4l2-dv-timings.h> +#include <linux/hdmi.h> +#include <media/cec.h> +#include <media/v4l2-dv-timings.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-event.h> +#include <media/v4l2-fwnode.h> +#include <media/i2c/tc358743.h> + +#include "tc358743_regs.h" + +static int debug; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "debug level (0-3)"); + +MODULE_DESCRIPTION("Toshiba TC358743 HDMI to CSI-2 bridge driver"); +MODULE_AUTHOR("Ramakrishnan Muthukrishnan <ram@rkrishnan.org>"); +MODULE_AUTHOR("Mikhail Khelik <mkhelik@cisco.com>"); +MODULE_AUTHOR("Mats Randgaard <matrandg@cisco.com>"); +MODULE_LICENSE("GPL"); + +#define EDID_NUM_BLOCKS_MAX 8 +#define EDID_BLOCK_SIZE 128 + +#define I2C_MAX_XFER_SIZE (EDID_BLOCK_SIZE + 2) + +#define POLL_INTERVAL_CEC_MS 10 +#define POLL_INTERVAL_MS 1000 + +static const struct v4l2_dv_timings_cap tc358743_timings_cap = { + .type = V4L2_DV_BT_656_1120, + /* keep this initialization for compatibility with GCC < 4.4.6 */ + .reserved = { 0 }, + /* Pixel clock from REF_01 p. 20. Min/max height/width are unknown */ + V4L2_INIT_BT_TIMINGS(640, 1920, 350, 1200, 13000000, 165000000, + V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT | + V4L2_DV_BT_STD_GTF | V4L2_DV_BT_STD_CVT, + V4L2_DV_BT_CAP_PROGRESSIVE | + V4L2_DV_BT_CAP_REDUCED_BLANKING | + V4L2_DV_BT_CAP_CUSTOM) +}; + +struct tc358743_state { + struct tc358743_platform_data pdata; + struct v4l2_mbus_config_mipi_csi2 bus; + struct v4l2_subdev sd; + struct media_pad pad; + struct v4l2_ctrl_handler hdl; + struct i2c_client *i2c_client; + /* CONFCTL is modified in ops and tc358743_hdmi_sys_int_handler */ + struct mutex confctl_mutex; + + /* controls */ + struct v4l2_ctrl *detect_tx_5v_ctrl; + struct v4l2_ctrl *audio_sampling_rate_ctrl; + struct v4l2_ctrl *audio_present_ctrl; + + struct delayed_work delayed_work_enable_hotplug; + + struct timer_list timer; + struct work_struct work_i2c_poll; + + /* edid */ + u8 edid_blocks_written; + + struct v4l2_dv_timings timings; + u32 mbus_fmt_code; + u8 csi_lanes_in_use; + + struct gpio_desc *reset_gpio; + + struct cec_adapter *cec_adap; +}; + +static void tc358743_enable_interrupts(struct v4l2_subdev *sd, + bool cable_connected); +static int tc358743_s_ctrl_detect_tx_5v(struct v4l2_subdev *sd); + +static inline struct tc358743_state *to_state(struct v4l2_subdev *sd) +{ + return container_of(sd, struct tc358743_state, sd); +} + +/* --------------- I2C --------------- */ + +static void i2c_rd(struct v4l2_subdev *sd, u16 reg, u8 *values, u32 n) +{ + struct tc358743_state *state = to_state(sd); + struct i2c_client *client = state->i2c_client; + int err; + u8 buf[2] = { reg >> 8, reg & 0xff }; + struct i2c_msg msgs[] = { + { + .addr = client->addr, + .flags = 0, + .len = 2, + .buf = buf, + }, + { + .addr = client->addr, + .flags = I2C_M_RD, + .len = n, + .buf = values, + }, + }; + + err = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); + if (err != ARRAY_SIZE(msgs)) { + v4l2_err(sd, "%s: reading register 0x%x from 0x%x failed\n", + __func__, reg, client->addr); + } +} + +static void i2c_wr(struct v4l2_subdev *sd, u16 reg, u8 *values, u32 n) +{ + struct tc358743_state *state = to_state(sd); + struct i2c_client *client = state->i2c_client; + int err, i; + struct i2c_msg msg; + u8 data[I2C_MAX_XFER_SIZE]; + + if ((2 + n) > I2C_MAX_XFER_SIZE) { + n = I2C_MAX_XFER_SIZE - 2; + v4l2_warn(sd, "i2c wr reg=%04x: len=%d is too big!\n", + reg, 2 + n); + } + + msg.addr = client->addr; + msg.buf = data; + msg.len = 2 + n; + msg.flags = 0; + + data[0] = reg >> 8; + data[1] = reg & 0xff; + + for (i = 0; i < n; i++) + data[2 + i] = values[i]; + + err = i2c_transfer(client->adapter, &msg, 1); + if (err != 1) { + v4l2_err(sd, "%s: writing register 0x%x from 0x%x failed\n", + __func__, reg, client->addr); + return; + } + + if (debug < 3) + return; + + switch (n) { + case 1: + v4l2_info(sd, "I2C write 0x%04x = 0x%02x", + reg, data[2]); + break; + case 2: + v4l2_info(sd, "I2C write 0x%04x = 0x%02x%02x", + reg, data[3], data[2]); + break; + case 4: + v4l2_info(sd, "I2C write 0x%04x = 0x%02x%02x%02x%02x", + reg, data[5], data[4], data[3], data[2]); + break; + default: + v4l2_info(sd, "I2C write %d bytes from address 0x%04x\n", + n, reg); + } +} + +static noinline u32 i2c_rdreg(struct v4l2_subdev *sd, u16 reg, u32 n) +{ + __le32 val = 0; + + i2c_rd(sd, reg, (u8 __force *)&val, n); + + return le32_to_cpu(val); +} + +static noinline void i2c_wrreg(struct v4l2_subdev *sd, u16 reg, u32 val, u32 n) +{ + __le32 raw = cpu_to_le32(val); + + i2c_wr(sd, reg, (u8 __force *)&raw, n); +} + +static u8 i2c_rd8(struct v4l2_subdev *sd, u16 reg) +{ + return i2c_rdreg(sd, reg, 1); +} + +static void i2c_wr8(struct v4l2_subdev *sd, u16 reg, u8 val) +{ + i2c_wrreg(sd, reg, val, 1); +} + +static void i2c_wr8_and_or(struct v4l2_subdev *sd, u16 reg, + u8 mask, u8 val) +{ + i2c_wrreg(sd, reg, (i2c_rdreg(sd, reg, 1) & mask) | val, 1); +} + +static u16 i2c_rd16(struct v4l2_subdev *sd, u16 reg) +{ + return i2c_rdreg(sd, reg, 2); +} + +static void i2c_wr16(struct v4l2_subdev *sd, u16 reg, u16 val) +{ + i2c_wrreg(sd, reg, val, 2); +} + +static void i2c_wr16_and_or(struct v4l2_subdev *sd, u16 reg, u16 mask, u16 val) +{ + i2c_wrreg(sd, reg, (i2c_rdreg(sd, reg, 2) & mask) | val, 2); +} + +static u32 i2c_rd32(struct v4l2_subdev *sd, u16 reg) +{ + return i2c_rdreg(sd, reg, 4); +} + +static void i2c_wr32(struct v4l2_subdev *sd, u16 reg, u32 val) +{ + i2c_wrreg(sd, reg, val, 4); +} + +/* --------------- STATUS --------------- */ + +static inline bool is_hdmi(struct v4l2_subdev *sd) +{ + return i2c_rd8(sd, SYS_STATUS) & MASK_S_HDMI; +} + +static inline bool tx_5v_power_present(struct v4l2_subdev *sd) +{ + return i2c_rd8(sd, SYS_STATUS) & MASK_S_DDC5V; +} + +static inline bool no_signal(struct v4l2_subdev *sd) +{ + return !(i2c_rd8(sd, SYS_STATUS) & MASK_S_TMDS); +} + +static inline bool no_sync(struct v4l2_subdev *sd) +{ + return !(i2c_rd8(sd, SYS_STATUS) & MASK_S_SYNC); +} + +static inline bool audio_present(struct v4l2_subdev *sd) +{ + return i2c_rd8(sd, AU_STATUS0) & MASK_S_A_SAMPLE; +} + +static int get_audio_sampling_rate(struct v4l2_subdev *sd) +{ + static const int code_to_rate[] = { + 44100, 0, 48000, 32000, 22050, 384000, 24000, 352800, + 88200, 768000, 96000, 705600, 176400, 0, 192000, 0 + }; + + /* Register FS_SET is not cleared when the cable is disconnected */ + if (no_signal(sd)) + return 0; + + return code_to_rate[i2c_rd8(sd, FS_SET) & MASK_FS]; +} + +/* --------------- TIMINGS --------------- */ + +static inline unsigned fps(const struct v4l2_bt_timings *t) +{ + if (!V4L2_DV_BT_FRAME_HEIGHT(t) || !V4L2_DV_BT_FRAME_WIDTH(t)) + return 0; + + return DIV_ROUND_CLOSEST((unsigned)t->pixelclock, + V4L2_DV_BT_FRAME_HEIGHT(t) * V4L2_DV_BT_FRAME_WIDTH(t)); +} + +static int tc358743_get_detected_timings(struct v4l2_subdev *sd, + struct v4l2_dv_timings *timings) +{ + struct v4l2_bt_timings *bt = &timings->bt; + unsigned width, height, frame_width, frame_height, frame_interval, fps; + + memset(timings, 0, sizeof(struct v4l2_dv_timings)); + + if (no_signal(sd)) { + v4l2_dbg(1, debug, sd, "%s: no valid signal\n", __func__); + return -ENOLINK; + } + if (no_sync(sd)) { + v4l2_dbg(1, debug, sd, "%s: no sync on signal\n", __func__); + return -ENOLCK; + } + + timings->type = V4L2_DV_BT_656_1120; + bt->interlaced = i2c_rd8(sd, VI_STATUS1) & MASK_S_V_INTERLACE ? + V4L2_DV_INTERLACED : V4L2_DV_PROGRESSIVE; + + width = ((i2c_rd8(sd, DE_WIDTH_H_HI) & 0x1f) << 8) + + i2c_rd8(sd, DE_WIDTH_H_LO); + height = ((i2c_rd8(sd, DE_WIDTH_V_HI) & 0x1f) << 8) + + i2c_rd8(sd, DE_WIDTH_V_LO); + frame_width = ((i2c_rd8(sd, H_SIZE_HI) & 0x1f) << 8) + + i2c_rd8(sd, H_SIZE_LO); + frame_height = (((i2c_rd8(sd, V_SIZE_HI) & 0x3f) << 8) + + i2c_rd8(sd, V_SIZE_LO)) / 2; + /* frame interval in milliseconds * 10 + * Require SYS_FREQ0 and SYS_FREQ1 are precisely set */ + frame_interval = ((i2c_rd8(sd, FV_CNT_HI) & 0x3) << 8) + + i2c_rd8(sd, FV_CNT_LO); + fps = (frame_interval > 0) ? + DIV_ROUND_CLOSEST(10000, frame_interval) : 0; + + bt->width = width; + bt->height = height; + bt->vsync = frame_height - height; + bt->hsync = frame_width - width; + bt->pixelclock = frame_width * frame_height * fps; + if (bt->interlaced == V4L2_DV_INTERLACED) { + bt->height *= 2; + bt->il_vsync = bt->vsync + 1; + bt->pixelclock /= 2; + } + + return 0; +} + +/* --------------- HOTPLUG / HDCP / EDID --------------- */ + +static void tc358743_delayed_work_enable_hotplug(struct work_struct *work) +{ + struct delayed_work *dwork = to_delayed_work(work); + struct tc358743_state *state = container_of(dwork, + struct tc358743_state, delayed_work_enable_hotplug); + struct v4l2_subdev *sd = &state->sd; + + v4l2_dbg(2, debug, sd, "%s:\n", __func__); + + i2c_wr8_and_or(sd, HPD_CTL, ~MASK_HPD_OUT0, MASK_HPD_OUT0); +} + +static void tc358743_set_hdmi_hdcp(struct v4l2_subdev *sd, bool enable) +{ + v4l2_dbg(2, debug, sd, "%s: %s\n", __func__, enable ? + "enable" : "disable"); + + if (enable) { + i2c_wr8_and_or(sd, HDCP_REG3, ~KEY_RD_CMD, KEY_RD_CMD); + + i2c_wr8_and_or(sd, HDCP_MODE, ~MASK_MANUAL_AUTHENTICATION, 0); + + i2c_wr8_and_or(sd, HDCP_REG1, 0xff, + MASK_AUTH_UNAUTH_SEL_16_FRAMES | + MASK_AUTH_UNAUTH_AUTO); + + i2c_wr8_and_or(sd, HDCP_REG2, ~MASK_AUTO_P3_RESET, + SET_AUTO_P3_RESET_FRAMES(0x0f)); + } else { + i2c_wr8_and_or(sd, HDCP_MODE, ~MASK_MANUAL_AUTHENTICATION, + MASK_MANUAL_AUTHENTICATION); + } +} + +static void tc358743_disable_edid(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + + v4l2_dbg(2, debug, sd, "%s:\n", __func__); + + cancel_delayed_work_sync(&state->delayed_work_enable_hotplug); + + /* DDC access to EDID is also disabled when hotplug is disabled. See + * register DDC_CTL */ + i2c_wr8_and_or(sd, HPD_CTL, ~MASK_HPD_OUT0, 0x0); +} + +static void tc358743_enable_edid(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + + if (state->edid_blocks_written == 0) { + v4l2_dbg(2, debug, sd, "%s: no EDID -> no hotplug\n", __func__); + tc358743_s_ctrl_detect_tx_5v(sd); + return; + } + + v4l2_dbg(2, debug, sd, "%s:\n", __func__); + + /* Enable hotplug after 100 ms. DDC access to EDID is also enabled when + * hotplug is enabled. See register DDC_CTL */ + schedule_delayed_work(&state->delayed_work_enable_hotplug, HZ / 10); + + tc358743_enable_interrupts(sd, true); + tc358743_s_ctrl_detect_tx_5v(sd); +} + +static void tc358743_erase_bksv(struct v4l2_subdev *sd) +{ + int i; + + for (i = 0; i < 5; i++) + i2c_wr8(sd, BKSV + i, 0); +} + +/* --------------- AVI infoframe --------------- */ + +static void print_avi_infoframe(struct v4l2_subdev *sd) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct device *dev = &client->dev; + union hdmi_infoframe frame; + u8 buffer[HDMI_INFOFRAME_SIZE(AVI)]; + + if (!is_hdmi(sd)) { + v4l2_info(sd, "DVI-D signal - AVI infoframe not supported\n"); + return; + } + + i2c_rd(sd, PK_AVI_0HEAD, buffer, HDMI_INFOFRAME_SIZE(AVI)); + + if (hdmi_infoframe_unpack(&frame, buffer, sizeof(buffer)) < 0) { + v4l2_err(sd, "%s: unpack of AVI infoframe failed\n", __func__); + return; + } + + hdmi_infoframe_log(KERN_INFO, dev, &frame); +} + +/* --------------- CTRLS --------------- */ + +static int tc358743_s_ctrl_detect_tx_5v(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + + return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl, + tx_5v_power_present(sd)); +} + +static int tc358743_s_ctrl_audio_sampling_rate(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + + return v4l2_ctrl_s_ctrl(state->audio_sampling_rate_ctrl, + get_audio_sampling_rate(sd)); +} + +static int tc358743_s_ctrl_audio_present(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + + return v4l2_ctrl_s_ctrl(state->audio_present_ctrl, + audio_present(sd)); +} + +static int tc358743_update_controls(struct v4l2_subdev *sd) +{ + int ret = 0; + + ret |= tc358743_s_ctrl_detect_tx_5v(sd); + ret |= tc358743_s_ctrl_audio_sampling_rate(sd); + ret |= tc358743_s_ctrl_audio_present(sd); + + return ret; +} + +/* --------------- INIT --------------- */ + +static void tc358743_reset_phy(struct v4l2_subdev *sd) +{ + v4l2_dbg(1, debug, sd, "%s:\n", __func__); + + i2c_wr8_and_or(sd, PHY_RST, ~MASK_RESET_CTRL, 0); + i2c_wr8_and_or(sd, PHY_RST, ~MASK_RESET_CTRL, MASK_RESET_CTRL); +} + +static void tc358743_reset(struct v4l2_subdev *sd, uint16_t mask) +{ + u16 sysctl = i2c_rd16(sd, SYSCTL); + + i2c_wr16(sd, SYSCTL, sysctl | mask); + i2c_wr16(sd, SYSCTL, sysctl & ~mask); +} + +static inline void tc358743_sleep_mode(struct v4l2_subdev *sd, bool enable) +{ + i2c_wr16_and_or(sd, SYSCTL, ~MASK_SLEEP, + enable ? MASK_SLEEP : 0); +} + +static inline void enable_stream(struct v4l2_subdev *sd, bool enable) +{ + struct tc358743_state *state = to_state(sd); + + v4l2_dbg(3, debug, sd, "%s: %sable\n", + __func__, enable ? "en" : "dis"); + + if (enable) { + /* It is critical for CSI receiver to see lane transition + * LP11->HS. Set to non-continuous mode to enable clock lane + * LP11 state. */ + i2c_wr32(sd, TXOPTIONCNTRL, 0); + /* Set to continuous mode to trigger LP11->HS transition */ + i2c_wr32(sd, TXOPTIONCNTRL, MASK_CONTCLKMODE); + /* Unmute video */ + i2c_wr8(sd, VI_MUTE, MASK_AUTO_MUTE); + } else { + /* Mute video so that all data lanes go to LSP11 state. + * No data is output to CSI Tx block. */ + i2c_wr8(sd, VI_MUTE, MASK_AUTO_MUTE | MASK_VI_MUTE); + } + + mutex_lock(&state->confctl_mutex); + i2c_wr16_and_or(sd, CONFCTL, ~(MASK_VBUFEN | MASK_ABUFEN), + enable ? (MASK_VBUFEN | MASK_ABUFEN) : 0x0); + mutex_unlock(&state->confctl_mutex); +} + +static void tc358743_set_pll(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + struct tc358743_platform_data *pdata = &state->pdata; + u16 pllctl0 = i2c_rd16(sd, PLLCTL0); + u16 pllctl1 = i2c_rd16(sd, PLLCTL1); + u16 pllctl0_new = SET_PLL_PRD(pdata->pll_prd) | + SET_PLL_FBD(pdata->pll_fbd); + u32 hsck = (pdata->refclk_hz / pdata->pll_prd) * pdata->pll_fbd; + + v4l2_dbg(2, debug, sd, "%s:\n", __func__); + + /* Only rewrite when needed (new value or disabled), since rewriting + * triggers another format change event. */ + if ((pllctl0 != pllctl0_new) || ((pllctl1 & MASK_PLL_EN) == 0)) { + u16 pll_frs; + + if (hsck > 500000000) + pll_frs = 0x0; + else if (hsck > 250000000) + pll_frs = 0x1; + else if (hsck > 125000000) + pll_frs = 0x2; + else + pll_frs = 0x3; + + v4l2_dbg(1, debug, sd, "%s: updating PLL clock\n", __func__); + tc358743_sleep_mode(sd, true); + i2c_wr16(sd, PLLCTL0, pllctl0_new); + i2c_wr16_and_or(sd, PLLCTL1, + ~(MASK_PLL_FRS | MASK_RESETB | MASK_PLL_EN), + (SET_PLL_FRS(pll_frs) | MASK_RESETB | + MASK_PLL_EN)); + udelay(10); /* REF_02, Sheet "Source HDMI" */ + i2c_wr16_and_or(sd, PLLCTL1, ~MASK_CKEN, MASK_CKEN); + tc358743_sleep_mode(sd, false); + } +} + +static void tc358743_set_ref_clk(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + struct tc358743_platform_data *pdata = &state->pdata; + u32 sys_freq; + u32 lockdet_ref; + u32 cec_freq; + u16 fh_min; + u16 fh_max; + + BUG_ON(!(pdata->refclk_hz == 26000000 || + pdata->refclk_hz == 27000000 || + pdata->refclk_hz == 42000000)); + + sys_freq = pdata->refclk_hz / 10000; + i2c_wr8(sd, SYS_FREQ0, sys_freq & 0x00ff); + i2c_wr8(sd, SYS_FREQ1, (sys_freq & 0xff00) >> 8); + + i2c_wr8_and_or(sd, PHY_CTL0, ~MASK_PHY_SYSCLK_IND, + (pdata->refclk_hz == 42000000) ? + MASK_PHY_SYSCLK_IND : 0x0); + + fh_min = pdata->refclk_hz / 100000; + i2c_wr8(sd, FH_MIN0, fh_min & 0x00ff); + i2c_wr8(sd, FH_MIN1, (fh_min & 0xff00) >> 8); + + fh_max = (fh_min * 66) / 10; + i2c_wr8(sd, FH_MAX0, fh_max & 0x00ff); + i2c_wr8(sd, FH_MAX1, (fh_max & 0xff00) >> 8); + + lockdet_ref = pdata->refclk_hz / 100; + i2c_wr8(sd, LOCKDET_REF0, lockdet_ref & 0x0000ff); + i2c_wr8(sd, LOCKDET_REF1, (lockdet_ref & 0x00ff00) >> 8); + i2c_wr8(sd, LOCKDET_REF2, (lockdet_ref & 0x0f0000) >> 16); + + i2c_wr8_and_or(sd, NCO_F0_MOD, ~MASK_NCO_F0_MOD, + (pdata->refclk_hz == 27000000) ? + MASK_NCO_F0_MOD_27MHZ : 0x0); + + /* + * Trial and error suggests that the default register value + * of 656 is for a 42 MHz reference clock. Use that to derive + * a new value based on the actual reference clock. + */ + cec_freq = (656 * sys_freq) / 4200; + i2c_wr16(sd, CECHCLK, cec_freq); + i2c_wr16(sd, CECLCLK, cec_freq); +} + +static void tc358743_set_csi_color_space(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + + switch (state->mbus_fmt_code) { + case MEDIA_BUS_FMT_UYVY8_1X16: + v4l2_dbg(2, debug, sd, "%s: YCbCr 422 16-bit\n", __func__); + i2c_wr8_and_or(sd, VOUT_SET2, + ~(MASK_SEL422 | MASK_VOUT_422FIL_100) & 0xff, + MASK_SEL422 | MASK_VOUT_422FIL_100); + i2c_wr8_and_or(sd, VI_REP, ~MASK_VOUT_COLOR_SEL & 0xff, + MASK_VOUT_COLOR_601_YCBCR_LIMITED); + mutex_lock(&state->confctl_mutex); + i2c_wr16_and_or(sd, CONFCTL, ~MASK_YCBCRFMT, + MASK_YCBCRFMT_422_8_BIT); + mutex_unlock(&state->confctl_mutex); + break; + case MEDIA_BUS_FMT_RGB888_1X24: + v4l2_dbg(2, debug, sd, "%s: RGB 888 24-bit\n", __func__); + i2c_wr8_and_or(sd, VOUT_SET2, + ~(MASK_SEL422 | MASK_VOUT_422FIL_100) & 0xff, + 0x00); + i2c_wr8_and_or(sd, VI_REP, ~MASK_VOUT_COLOR_SEL & 0xff, + MASK_VOUT_COLOR_RGB_FULL); + mutex_lock(&state->confctl_mutex); + i2c_wr16_and_or(sd, CONFCTL, ~MASK_YCBCRFMT, 0); + mutex_unlock(&state->confctl_mutex); + break; + default: + v4l2_dbg(2, debug, sd, "%s: Unsupported format code 0x%x\n", + __func__, state->mbus_fmt_code); + } +} + +static unsigned tc358743_num_csi_lanes_needed(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + struct v4l2_bt_timings *bt = &state->timings.bt; + struct tc358743_platform_data *pdata = &state->pdata; + u32 bits_pr_pixel = + (state->mbus_fmt_code == MEDIA_BUS_FMT_UYVY8_1X16) ? 16 : 24; + u32 bps = bt->width * bt->height * fps(bt) * bits_pr_pixel; + u32 bps_pr_lane = (pdata->refclk_hz / pdata->pll_prd) * pdata->pll_fbd; + + return DIV_ROUND_UP(bps, bps_pr_lane); +} + +static void tc358743_set_csi(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + struct tc358743_platform_data *pdata = &state->pdata; + unsigned lanes = tc358743_num_csi_lanes_needed(sd); + + v4l2_dbg(3, debug, sd, "%s:\n", __func__); + + state->csi_lanes_in_use = lanes; + + tc358743_reset(sd, MASK_CTXRST); + + if (lanes < 1) + i2c_wr32(sd, CLW_CNTRL, MASK_CLW_LANEDISABLE); + if (lanes < 1) + i2c_wr32(sd, D0W_CNTRL, MASK_D0W_LANEDISABLE); + if (lanes < 2) + i2c_wr32(sd, D1W_CNTRL, MASK_D1W_LANEDISABLE); + if (lanes < 3) + i2c_wr32(sd, D2W_CNTRL, MASK_D2W_LANEDISABLE); + if (lanes < 4) + i2c_wr32(sd, D3W_CNTRL, MASK_D3W_LANEDISABLE); + + i2c_wr32(sd, LINEINITCNT, pdata->lineinitcnt); + i2c_wr32(sd, LPTXTIMECNT, pdata->lptxtimecnt); + i2c_wr32(sd, TCLK_HEADERCNT, pdata->tclk_headercnt); + i2c_wr32(sd, TCLK_TRAILCNT, pdata->tclk_trailcnt); + i2c_wr32(sd, THS_HEADERCNT, pdata->ths_headercnt); + i2c_wr32(sd, TWAKEUP, pdata->twakeup); + i2c_wr32(sd, TCLK_POSTCNT, pdata->tclk_postcnt); + i2c_wr32(sd, THS_TRAILCNT, pdata->ths_trailcnt); + i2c_wr32(sd, HSTXVREGCNT, pdata->hstxvregcnt); + + i2c_wr32(sd, HSTXVREGEN, + ((lanes > 0) ? MASK_CLM_HSTXVREGEN : 0x0) | + ((lanes > 0) ? MASK_D0M_HSTXVREGEN : 0x0) | + ((lanes > 1) ? MASK_D1M_HSTXVREGEN : 0x0) | + ((lanes > 2) ? MASK_D2M_HSTXVREGEN : 0x0) | + ((lanes > 3) ? MASK_D3M_HSTXVREGEN : 0x0)); + + i2c_wr32(sd, TXOPTIONCNTRL, (state->bus.flags & + V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK) ? 0 : MASK_CONTCLKMODE); + i2c_wr32(sd, STARTCNTRL, MASK_START); + i2c_wr32(sd, CSI_START, MASK_STRT); + + i2c_wr32(sd, CSI_CONFW, MASK_MODE_SET | + MASK_ADDRESS_CSI_CONTROL | + MASK_CSI_MODE | + MASK_TXHSMD | + ((lanes == 4) ? MASK_NOL_4 : + (lanes == 3) ? MASK_NOL_3 : + (lanes == 2) ? MASK_NOL_2 : MASK_NOL_1)); + + i2c_wr32(sd, CSI_CONFW, MASK_MODE_SET | + MASK_ADDRESS_CSI_ERR_INTENA | MASK_TXBRK | MASK_QUNK | + MASK_WCER | MASK_INER); + + i2c_wr32(sd, CSI_CONFW, MASK_MODE_CLEAR | + MASK_ADDRESS_CSI_ERR_HALT | MASK_TXBRK | MASK_QUNK); + + i2c_wr32(sd, CSI_CONFW, MASK_MODE_SET | + MASK_ADDRESS_CSI_INT_ENA | MASK_INTER); +} + +static void tc358743_set_hdmi_phy(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + struct tc358743_platform_data *pdata = &state->pdata; + + /* Default settings from REF_02, sheet "Source HDMI" + * and custom settings as platform data */ + i2c_wr8_and_or(sd, PHY_EN, ~MASK_ENABLE_PHY, 0x0); + i2c_wr8(sd, PHY_CTL1, SET_PHY_AUTO_RST1_US(1600) | + SET_FREQ_RANGE_MODE_CYCLES(1)); + i2c_wr8_and_or(sd, PHY_CTL2, ~MASK_PHY_AUTO_RSTn, + (pdata->hdmi_phy_auto_reset_tmds_detected ? + MASK_PHY_AUTO_RST2 : 0) | + (pdata->hdmi_phy_auto_reset_tmds_in_range ? + MASK_PHY_AUTO_RST3 : 0) | + (pdata->hdmi_phy_auto_reset_tmds_valid ? + MASK_PHY_AUTO_RST4 : 0)); + i2c_wr8(sd, PHY_BIAS, 0x40); + i2c_wr8(sd, PHY_CSQ, SET_CSQ_CNT_LEVEL(0x0a)); + i2c_wr8(sd, AVM_CTL, 45); + i2c_wr8_and_or(sd, HDMI_DET, ~MASK_HDMI_DET_V, + pdata->hdmi_detection_delay << 4); + i2c_wr8_and_or(sd, HV_RST, ~(MASK_H_PI_RST | MASK_V_PI_RST), + (pdata->hdmi_phy_auto_reset_hsync_out_of_range ? + MASK_H_PI_RST : 0) | + (pdata->hdmi_phy_auto_reset_vsync_out_of_range ? + MASK_V_PI_RST : 0)); + i2c_wr8_and_or(sd, PHY_EN, ~MASK_ENABLE_PHY, MASK_ENABLE_PHY); +} + +static void tc358743_set_hdmi_audio(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + + /* Default settings from REF_02, sheet "Source HDMI" */ + i2c_wr8(sd, FORCE_MUTE, 0x00); + i2c_wr8(sd, AUTO_CMD0, MASK_AUTO_MUTE7 | MASK_AUTO_MUTE6 | + MASK_AUTO_MUTE5 | MASK_AUTO_MUTE4 | + MASK_AUTO_MUTE1 | MASK_AUTO_MUTE0); + i2c_wr8(sd, AUTO_CMD1, MASK_AUTO_MUTE9); + i2c_wr8(sd, AUTO_CMD2, MASK_AUTO_PLAY3 | MASK_AUTO_PLAY2); + i2c_wr8(sd, BUFINIT_START, SET_BUFINIT_START_MS(500)); + i2c_wr8(sd, FS_MUTE, 0x00); + i2c_wr8(sd, FS_IMODE, MASK_NLPCM_SMODE | MASK_FS_SMODE); + i2c_wr8(sd, ACR_MODE, MASK_CTS_MODE); + i2c_wr8(sd, ACR_MDF0, MASK_ACR_L2MDF_1976_PPM | MASK_ACR_L1MDF_976_PPM); + i2c_wr8(sd, ACR_MDF1, MASK_ACR_L3MDF_3906_PPM); + i2c_wr8(sd, SDO_MODE1, MASK_SDO_FMT_I2S); + i2c_wr8(sd, DIV_MODE, SET_DIV_DLY_MS(100)); + + mutex_lock(&state->confctl_mutex); + i2c_wr16_and_or(sd, CONFCTL, 0xffff, MASK_AUDCHNUM_2 | + MASK_AUDOUTSEL_I2S | MASK_AUTOINDEX); + mutex_unlock(&state->confctl_mutex); +} + +static void tc358743_set_hdmi_info_frame_mode(struct v4l2_subdev *sd) +{ + /* Default settings from REF_02, sheet "Source HDMI" */ + i2c_wr8(sd, PK_INT_MODE, MASK_ISRC2_INT_MODE | MASK_ISRC_INT_MODE | + MASK_ACP_INT_MODE | MASK_VS_INT_MODE | + MASK_SPD_INT_MODE | MASK_MS_INT_MODE | + MASK_AUD_INT_MODE | MASK_AVI_INT_MODE); + i2c_wr8(sd, NO_PKT_LIMIT, 0x2c); + i2c_wr8(sd, NO_PKT_CLR, 0x53); + i2c_wr8(sd, ERR_PK_LIMIT, 0x01); + i2c_wr8(sd, NO_PKT_LIMIT2, 0x30); + i2c_wr8(sd, NO_GDB_LIMIT, 0x10); +} + +static void tc358743_initial_setup(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + struct tc358743_platform_data *pdata = &state->pdata; + + /* + * IR is not supported by this driver. + * CEC is only enabled if needed. + */ + i2c_wr16_and_or(sd, SYSCTL, ~(MASK_IRRST | MASK_CECRST), + (MASK_IRRST | MASK_CECRST)); + + tc358743_reset(sd, MASK_CTXRST | MASK_HDMIRST); +#ifdef CONFIG_VIDEO_TC358743_CEC + tc358743_reset(sd, MASK_CECRST); +#endif + tc358743_sleep_mode(sd, false); + + i2c_wr16(sd, FIFOCTL, pdata->fifo_level); + + tc358743_set_ref_clk(sd); + + i2c_wr8_and_or(sd, DDC_CTL, ~MASK_DDC5V_MODE, + pdata->ddc5v_delay & MASK_DDC5V_MODE); + i2c_wr8_and_or(sd, EDID_MODE, ~MASK_EDID_MODE, MASK_EDID_MODE_E_DDC); + + tc358743_set_hdmi_phy(sd); + tc358743_set_hdmi_hdcp(sd, pdata->enable_hdcp); + tc358743_set_hdmi_audio(sd); + tc358743_set_hdmi_info_frame_mode(sd); + + /* All CE and IT formats are detected as RGB full range in DVI mode */ + i2c_wr8_and_or(sd, VI_MODE, ~MASK_RGB_DVI, 0); + + i2c_wr8_and_or(sd, VOUT_SET2, ~MASK_VOUTCOLORMODE, + MASK_VOUTCOLORMODE_AUTO); + i2c_wr8(sd, VOUT_SET3, MASK_VOUT_EXTCNT); +} + +/* --------------- CEC --------------- */ + +#ifdef CONFIG_VIDEO_TC358743_CEC +static int tc358743_cec_adap_enable(struct cec_adapter *adap, bool enable) +{ + struct tc358743_state *state = adap->priv; + struct v4l2_subdev *sd = &state->sd; + + i2c_wr32(sd, CECIMSK, enable ? MASK_CECTIM | MASK_CECRIM : 0); + i2c_wr32(sd, CECICLR, MASK_CECTICLR | MASK_CECRICLR); + i2c_wr32(sd, CECEN, enable); + if (enable) + i2c_wr32(sd, CECREN, MASK_CECREN); + return 0; +} + +static int tc358743_cec_adap_monitor_all_enable(struct cec_adapter *adap, + bool enable) +{ + struct tc358743_state *state = adap->priv; + struct v4l2_subdev *sd = &state->sd; + u32 reg; + + reg = i2c_rd32(sd, CECRCTL1); + if (enable) + reg |= MASK_CECOTH; + else + reg &= ~MASK_CECOTH; + i2c_wr32(sd, CECRCTL1, reg); + return 0; +} + +static int tc358743_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr) +{ + struct tc358743_state *state = adap->priv; + struct v4l2_subdev *sd = &state->sd; + unsigned int la = 0; + + if (log_addr != CEC_LOG_ADDR_INVALID) { + la = i2c_rd32(sd, CECADD); + la |= 1 << log_addr; + } + i2c_wr32(sd, CECADD, la); + return 0; +} + +static int tc358743_cec_adap_transmit(struct cec_adapter *adap, u8 attempts, + u32 signal_free_time, struct cec_msg *msg) +{ + struct tc358743_state *state = adap->priv; + struct v4l2_subdev *sd = &state->sd; + unsigned int i; + + i2c_wr32(sd, CECTCTL, + (cec_msg_is_broadcast(msg) ? MASK_CECBRD : 0) | + (signal_free_time - 1)); + for (i = 0; i < msg->len; i++) + i2c_wr32(sd, CECTBUF1 + i * 4, + msg->msg[i] | ((i == msg->len - 1) ? MASK_CECTEOM : 0)); + i2c_wr32(sd, CECTEN, MASK_CECTEN); + return 0; +} + +static const struct cec_adap_ops tc358743_cec_adap_ops = { + .adap_enable = tc358743_cec_adap_enable, + .adap_log_addr = tc358743_cec_adap_log_addr, + .adap_transmit = tc358743_cec_adap_transmit, + .adap_monitor_all_enable = tc358743_cec_adap_monitor_all_enable, +}; + +static void tc358743_cec_handler(struct v4l2_subdev *sd, u16 intstatus, + bool *handled) +{ + struct tc358743_state *state = to_state(sd); + unsigned int cec_rxint, cec_txint; + unsigned int clr = 0; + + cec_rxint = i2c_rd32(sd, CECRSTAT); + cec_txint = i2c_rd32(sd, CECTSTAT); + + if (intstatus & MASK_CEC_RINT) + clr |= MASK_CECRICLR; + if (intstatus & MASK_CEC_TINT) + clr |= MASK_CECTICLR; + i2c_wr32(sd, CECICLR, clr); + + if ((intstatus & MASK_CEC_TINT) && cec_txint) { + if (cec_txint & MASK_CECTIEND) + cec_transmit_attempt_done(state->cec_adap, + CEC_TX_STATUS_OK); + else if (cec_txint & MASK_CECTIAL) + cec_transmit_attempt_done(state->cec_adap, + CEC_TX_STATUS_ARB_LOST); + else if (cec_txint & MASK_CECTIACK) + cec_transmit_attempt_done(state->cec_adap, + CEC_TX_STATUS_NACK); + else if (cec_txint & MASK_CECTIUR) { + /* + * Not sure when this bit is set. Treat + * it as an error for now. + */ + cec_transmit_attempt_done(state->cec_adap, + CEC_TX_STATUS_ERROR); + } + if (handled) + *handled = true; + } + if ((intstatus & MASK_CEC_RINT) && + (cec_rxint & MASK_CECRIEND)) { + struct cec_msg msg = {}; + unsigned int i; + unsigned int v; + + v = i2c_rd32(sd, CECRCTR); + msg.len = v & 0x1f; + if (msg.len > CEC_MAX_MSG_SIZE) + msg.len = CEC_MAX_MSG_SIZE; + for (i = 0; i < msg.len; i++) { + v = i2c_rd32(sd, CECRBUF1 + i * 4); + msg.msg[i] = v & 0xff; + } + cec_received_msg(state->cec_adap, &msg); + if (handled) + *handled = true; + } + i2c_wr16(sd, INTSTATUS, + intstatus & (MASK_CEC_RINT | MASK_CEC_TINT)); +} + +#endif + +/* --------------- IRQ --------------- */ + +static void tc358743_format_change(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + struct v4l2_dv_timings timings; + const struct v4l2_event tc358743_ev_fmt = { + .type = V4L2_EVENT_SOURCE_CHANGE, + .u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION, + }; + + if (tc358743_get_detected_timings(sd, &timings)) { + enable_stream(sd, false); + + v4l2_dbg(1, debug, sd, "%s: No signal\n", + __func__); + } else { + if (!v4l2_match_dv_timings(&state->timings, &timings, 0, false)) + enable_stream(sd, false); + + if (debug) + v4l2_print_dv_timings(sd->name, + "tc358743_format_change: New format: ", + &timings, false); + } + + if (sd->devnode) + v4l2_subdev_notify_event(sd, &tc358743_ev_fmt); +} + +static void tc358743_init_interrupts(struct v4l2_subdev *sd) +{ + u16 i; + + /* clear interrupt status registers */ + for (i = SYS_INT; i <= KEY_INT; i++) + i2c_wr8(sd, i, 0xff); + + i2c_wr16(sd, INTSTATUS, 0xffff); +} + +static void tc358743_enable_interrupts(struct v4l2_subdev *sd, + bool cable_connected) +{ + v4l2_dbg(2, debug, sd, "%s: cable connected = %d\n", __func__, + cable_connected); + + if (cable_connected) { + i2c_wr8(sd, SYS_INTM, ~(MASK_M_DDC | MASK_M_DVI_DET | + MASK_M_HDMI_DET) & 0xff); + i2c_wr8(sd, CLK_INTM, ~MASK_M_IN_DE_CHG); + i2c_wr8(sd, CBIT_INTM, ~(MASK_M_CBIT_FS | MASK_M_AF_LOCK | + MASK_M_AF_UNLOCK) & 0xff); + i2c_wr8(sd, AUDIO_INTM, ~MASK_M_BUFINIT_END); + i2c_wr8(sd, MISC_INTM, ~MASK_M_SYNC_CHG); + } else { + i2c_wr8(sd, SYS_INTM, ~MASK_M_DDC & 0xff); + i2c_wr8(sd, CLK_INTM, 0xff); + i2c_wr8(sd, CBIT_INTM, 0xff); + i2c_wr8(sd, AUDIO_INTM, 0xff); + i2c_wr8(sd, MISC_INTM, 0xff); + } +} + +static void tc358743_hdmi_audio_int_handler(struct v4l2_subdev *sd, + bool *handled) +{ + u8 audio_int_mask = i2c_rd8(sd, AUDIO_INTM); + u8 audio_int = i2c_rd8(sd, AUDIO_INT) & ~audio_int_mask; + + i2c_wr8(sd, AUDIO_INT, audio_int); + + v4l2_dbg(3, debug, sd, "%s: AUDIO_INT = 0x%02x\n", __func__, audio_int); + + tc358743_s_ctrl_audio_sampling_rate(sd); + tc358743_s_ctrl_audio_present(sd); +} + +static void tc358743_csi_err_int_handler(struct v4l2_subdev *sd, bool *handled) +{ + v4l2_err(sd, "%s: CSI_ERR = 0x%x\n", __func__, i2c_rd32(sd, CSI_ERR)); + + i2c_wr32(sd, CSI_INT_CLR, MASK_ICRER); +} + +static void tc358743_hdmi_misc_int_handler(struct v4l2_subdev *sd, + bool *handled) +{ + u8 misc_int_mask = i2c_rd8(sd, MISC_INTM); + u8 misc_int = i2c_rd8(sd, MISC_INT) & ~misc_int_mask; + + i2c_wr8(sd, MISC_INT, misc_int); + + v4l2_dbg(3, debug, sd, "%s: MISC_INT = 0x%02x\n", __func__, misc_int); + + if (misc_int & MASK_I_SYNC_CHG) { + /* Reset the HDMI PHY to try to trigger proper lock on the + * incoming video format. Erase BKSV to prevent that old keys + * are used when a new source is connected. */ + if (no_sync(sd) || no_signal(sd)) { + tc358743_reset_phy(sd); + tc358743_erase_bksv(sd); + } + + tc358743_format_change(sd); + + misc_int &= ~MASK_I_SYNC_CHG; + if (handled) + *handled = true; + } + + if (misc_int) { + v4l2_err(sd, "%s: Unhandled MISC_INT interrupts: 0x%02x\n", + __func__, misc_int); + } +} + +static void tc358743_hdmi_cbit_int_handler(struct v4l2_subdev *sd, + bool *handled) +{ + u8 cbit_int_mask = i2c_rd8(sd, CBIT_INTM); + u8 cbit_int = i2c_rd8(sd, CBIT_INT) & ~cbit_int_mask; + + i2c_wr8(sd, CBIT_INT, cbit_int); + + v4l2_dbg(3, debug, sd, "%s: CBIT_INT = 0x%02x\n", __func__, cbit_int); + + if (cbit_int & MASK_I_CBIT_FS) { + + v4l2_dbg(1, debug, sd, "%s: Audio sample rate changed\n", + __func__); + tc358743_s_ctrl_audio_sampling_rate(sd); + + cbit_int &= ~MASK_I_CBIT_FS; + if (handled) + *handled = true; + } + + if (cbit_int & (MASK_I_AF_LOCK | MASK_I_AF_UNLOCK)) { + + v4l2_dbg(1, debug, sd, "%s: Audio present changed\n", + __func__); + tc358743_s_ctrl_audio_present(sd); + + cbit_int &= ~(MASK_I_AF_LOCK | MASK_I_AF_UNLOCK); + if (handled) + *handled = true; + } + + if (cbit_int) { + v4l2_err(sd, "%s: Unhandled CBIT_INT interrupts: 0x%02x\n", + __func__, cbit_int); + } +} + +static void tc358743_hdmi_clk_int_handler(struct v4l2_subdev *sd, bool *handled) +{ + u8 clk_int_mask = i2c_rd8(sd, CLK_INTM); + u8 clk_int = i2c_rd8(sd, CLK_INT) & ~clk_int_mask; + + /* Bit 7 and bit 6 are set even when they are masked */ + i2c_wr8(sd, CLK_INT, clk_int | 0x80 | MASK_I_OUT_H_CHG); + + v4l2_dbg(3, debug, sd, "%s: CLK_INT = 0x%02x\n", __func__, clk_int); + + if (clk_int & (MASK_I_IN_DE_CHG)) { + + v4l2_dbg(1, debug, sd, "%s: DE size or position has changed\n", + __func__); + + /* If the source switch to a new resolution with the same pixel + * frequency as the existing (e.g. 1080p25 -> 720p50), the + * I_SYNC_CHG interrupt is not always triggered, while the + * I_IN_DE_CHG interrupt seems to work fine. Format change + * notifications are only sent when the signal is stable to + * reduce the number of notifications. */ + if (!no_signal(sd) && !no_sync(sd)) + tc358743_format_change(sd); + + clk_int &= ~(MASK_I_IN_DE_CHG); + if (handled) + *handled = true; + } + + if (clk_int) { + v4l2_err(sd, "%s: Unhandled CLK_INT interrupts: 0x%02x\n", + __func__, clk_int); + } +} + +static void tc358743_hdmi_sys_int_handler(struct v4l2_subdev *sd, bool *handled) +{ + struct tc358743_state *state = to_state(sd); + u8 sys_int_mask = i2c_rd8(sd, SYS_INTM); + u8 sys_int = i2c_rd8(sd, SYS_INT) & ~sys_int_mask; + + i2c_wr8(sd, SYS_INT, sys_int); + + v4l2_dbg(3, debug, sd, "%s: SYS_INT = 0x%02x\n", __func__, sys_int); + + if (sys_int & MASK_I_DDC) { + bool tx_5v = tx_5v_power_present(sd); + + v4l2_dbg(1, debug, sd, "%s: Tx 5V power present: %s\n", + __func__, tx_5v ? "yes" : "no"); + + if (tx_5v) { + tc358743_enable_edid(sd); + } else { + tc358743_enable_interrupts(sd, false); + tc358743_disable_edid(sd); + memset(&state->timings, 0, sizeof(state->timings)); + tc358743_erase_bksv(sd); + tc358743_update_controls(sd); + } + + sys_int &= ~MASK_I_DDC; + if (handled) + *handled = true; + } + + if (sys_int & MASK_I_DVI) { + v4l2_dbg(1, debug, sd, "%s: HDMI->DVI change detected\n", + __func__); + + /* Reset the HDMI PHY to try to trigger proper lock on the + * incoming video format. Erase BKSV to prevent that old keys + * are used when a new source is connected. */ + if (no_sync(sd) || no_signal(sd)) { + tc358743_reset_phy(sd); + tc358743_erase_bksv(sd); + } + + sys_int &= ~MASK_I_DVI; + if (handled) + *handled = true; + } + + if (sys_int & MASK_I_HDMI) { + v4l2_dbg(1, debug, sd, "%s: DVI->HDMI change detected\n", + __func__); + + /* Register is reset in DVI mode (REF_01, c. 6.6.41) */ + i2c_wr8(sd, ANA_CTL, MASK_APPL_PCSX_NORMAL | MASK_ANALOG_ON); + + sys_int &= ~MASK_I_HDMI; + if (handled) + *handled = true; + } + + if (sys_int) { + v4l2_err(sd, "%s: Unhandled SYS_INT interrupts: 0x%02x\n", + __func__, sys_int); + } +} + +/* --------------- CORE OPS --------------- */ + +static int tc358743_log_status(struct v4l2_subdev *sd) +{ + struct tc358743_state *state = to_state(sd); + struct v4l2_dv_timings timings; + uint8_t hdmi_sys_status = i2c_rd8(sd, SYS_STATUS); + uint16_t sysctl = i2c_rd16(sd, SYSCTL); + u8 vi_status3 = i2c_rd8(sd, VI_STATUS3); + const int deep_color_mode[4] = { 8, 10, 12, 16 }; + static const char * const input_color_space[] = { + "RGB", "YCbCr 601", "opRGB", "YCbCr 709", "NA (4)", + "xvYCC 601", "NA(6)", "xvYCC 709", "NA(8)", "sYCC601", + "NA(10)", "NA(11)", "NA(12)", "opYCC 601"}; + + v4l2_info(sd, "-----Chip status-----\n"); + v4l2_info(sd, "Chip ID: 0x%02x\n", + (i2c_rd16(sd, CHIPID) & MASK_CHIPID) >> 8); + v4l2_info(sd, "Chip revision: 0x%02x\n", + i2c_rd16(sd, CHIPID) & MASK_REVID); + v4l2_info(sd, "Reset: IR: %d, CEC: %d, CSI TX: %d, HDMI: %d\n", + !!(sysctl & MASK_IRRST), + !!(sysctl & MASK_CECRST), + !!(sysctl & MASK_CTXRST), + !!(sysctl & MASK_HDMIRST)); + v4l2_info(sd, "Sleep mode: %s\n", sysctl & MASK_SLEEP ? "on" : "off"); + v4l2_info(sd, "Cable detected (+5V power): %s\n", + hdmi_sys_status & MASK_S_DDC5V ? "yes" : "no"); + v4l2_info(sd, "DDC lines enabled: %s\n", + (i2c_rd8(sd, EDID_MODE) & MASK_EDID_MODE_E_DDC) ? + "yes" : "no"); + v4l2_info(sd, "Hotplug enabled: %s\n", + (i2c_rd8(sd, HPD_CTL) & MASK_HPD_OUT0) ? + "yes" : "no"); + v4l2_info(sd, "CEC enabled: %s\n", + (i2c_rd16(sd, CECEN) & MASK_CECEN) ? "yes" : "no"); + v4l2_info(sd, "-----Signal status-----\n"); + v4l2_info(sd, "TMDS signal detected: %s\n", + hdmi_sys_status & MASK_S_TMDS ? "yes" : "no"); + v4l2_info(sd, "Stable sync signal: %s\n", + hdmi_sys_status & MASK_S_SYNC ? "yes" : "no"); + v4l2_info(sd, "PHY PLL locked: %s\n", + hdmi_sys_status & MASK_S_PHY_PLL ? "yes" : "no"); + v4l2_info(sd, "PHY DE detected: %s\n", + hdmi_sys_status & MASK_S_PHY_SCDT ? "yes" : "no"); + + if (tc358743_get_detected_timings(sd, &timings)) { + v4l2_info(sd, "No video detected\n"); + } else { + v4l2_print_dv_timings(sd->name, "Detected format: ", &timings, + true); + } + v4l2_print_dv_timings(sd->name, "Configured format: ", &state->timings, + true); + + v4l2_info(sd, "-----CSI-TX status-----\n"); + v4l2_info(sd, "Lanes needed: %d\n", + tc358743_num_csi_lanes_needed(sd)); + v4l2_info(sd, "Lanes in use: %d\n", + state->csi_lanes_in_use); + v4l2_info(sd, "Waiting for particular sync signal: %s\n", + (i2c_rd16(sd, CSI_STATUS) & MASK_S_WSYNC) ? + "yes" : "no"); + v4l2_info(sd, "Transmit mode: %s\n", + (i2c_rd16(sd, CSI_STATUS) & MASK_S_TXACT) ? + "yes" : "no"); + v4l2_info(sd, "Receive mode: %s\n", + (i2c_rd16(sd, CSI_STATUS) & MASK_S_RXACT) ? + "yes" : "no"); + v4l2_info(sd, "Stopped: %s\n", + (i2c_rd16(sd, CSI_STATUS) & MASK_S_HLT) ? + "yes" : "no"); + v4l2_info(sd, "Color space: %s\n", + state->mbus_fmt_code == MEDIA_BUS_FMT_UYVY8_1X16 ? + "YCbCr 422 16-bit" : + state->mbus_fmt_code == MEDIA_BUS_FMT_RGB888_1X24 ? + "RGB 888 24-bit" : "Unsupported"); + + v4l2_info(sd, "-----%s status-----\n", is_hdmi(sd) ? "HDMI" : "DVI-D"); + v4l2_info(sd, "HDCP encrypted content: %s\n", + hdmi_sys_status & MASK_S_HDCP ? "yes" : "no"); + v4l2_info(sd, "Input color space: %s %s range\n", + input_color_space[(vi_status3 & MASK_S_V_COLOR) >> 1], + (vi_status3 & MASK_LIMITED) ? "limited" : "full"); + if (!is_hdmi(sd)) + return 0; + v4l2_info(sd, "AV Mute: %s\n", hdmi_sys_status & MASK_S_AVMUTE ? "on" : + "off"); + v4l2_info(sd, "Deep color mode: %d-bits per channel\n", + deep_color_mode[(i2c_rd8(sd, VI_STATUS1) & + MASK_S_DEEPCOLOR) >> 2]); + print_avi_infoframe(sd); + + return 0; +} + +#ifdef CONFIG_VIDEO_ADV_DEBUG +static void tc358743_print_register_map(struct v4l2_subdev *sd) +{ + v4l2_info(sd, "0x0000-0x00FF: Global Control Register\n"); + v4l2_info(sd, "0x0100-0x01FF: CSI2-TX PHY Register\n"); + v4l2_info(sd, "0x0200-0x03FF: CSI2-TX PPI Register\n"); + v4l2_info(sd, "0x0400-0x05FF: Reserved\n"); + v4l2_info(sd, "0x0600-0x06FF: CEC Register\n"); + v4l2_info(sd, "0x0700-0x84FF: Reserved\n"); + v4l2_info(sd, "0x8500-0x85FF: HDMIRX System Control Register\n"); + v4l2_info(sd, "0x8600-0x86FF: HDMIRX Audio Control Register\n"); + v4l2_info(sd, "0x8700-0x87FF: HDMIRX InfoFrame packet data Register\n"); + v4l2_info(sd, "0x8800-0x88FF: HDMIRX HDCP Port Register\n"); + v4l2_info(sd, "0x8900-0x89FF: HDMIRX Video Output Port & 3D Register\n"); + v4l2_info(sd, "0x8A00-0x8BFF: Reserved\n"); + v4l2_info(sd, "0x8C00-0x8FFF: HDMIRX EDID-RAM (1024bytes)\n"); + v4l2_info(sd, "0x9000-0x90FF: HDMIRX GBD Extraction Control\n"); + v4l2_info(sd, "0x9100-0x92FF: HDMIRX GBD RAM read\n"); + v4l2_info(sd, "0x9300- : Reserved\n"); +} + +static int tc358743_get_reg_size(u16 address) +{ + /* REF_01 p. 66-72 */ + if (address <= 0x00ff) + return 2; + else if ((address >= 0x0100) && (address <= 0x06FF)) + return 4; + else if ((address >= 0x0700) && (address <= 0x84ff)) + return 2; + else + return 1; +} + +static int tc358743_g_register(struct v4l2_subdev *sd, + struct v4l2_dbg_register *reg) +{ + if (reg->reg > 0xffff) { + tc358743_print_register_map(sd); + return -EINVAL; + } + + reg->size = tc358743_get_reg_size(reg->reg); + + reg->val = i2c_rdreg(sd, reg->reg, reg->size); + + return 0; +} + +static int tc358743_s_register(struct v4l2_subdev *sd, + const struct v4l2_dbg_register *reg) +{ + if (reg->reg > 0xffff) { + tc358743_print_register_map(sd); + return -EINVAL; + } + + /* It should not be possible for the user to enable HDCP with a simple + * v4l2-dbg command. + * + * DO NOT REMOVE THIS unless all other issues with HDCP have been + * resolved. + */ + if (reg->reg == HDCP_MODE || + reg->reg == HDCP_REG1 || + reg->reg == HDCP_REG2 || + reg->reg == HDCP_REG3 || + reg->reg == BCAPS) + return 0; + + i2c_wrreg(sd, (u16)reg->reg, reg->val, + tc358743_get_reg_size(reg->reg)); + + return 0; +} +#endif + +static int tc358743_isr(struct v4l2_subdev *sd, u32 status, bool *handled) +{ + u16 intstatus = i2c_rd16(sd, INTSTATUS); + + v4l2_dbg(1, debug, sd, "%s: IntStatus = 0x%04x\n", __func__, intstatus); + + if (intstatus & MASK_HDMI_INT) { + u8 hdmi_int0 = i2c_rd8(sd, HDMI_INT0); + u8 hdmi_int1 = i2c_rd8(sd, HDMI_INT1); + + if (hdmi_int0 & MASK_I_MISC) + tc358743_hdmi_misc_int_handler(sd, handled); + if (hdmi_int1 & MASK_I_CBIT) + tc358743_hdmi_cbit_int_handler(sd, handled); + if (hdmi_int1 & MASK_I_CLK) + tc358743_hdmi_clk_int_handler(sd, handled); + if (hdmi_int1 & MASK_I_SYS) + tc358743_hdmi_sys_int_handler(sd, handled); + if (hdmi_int1 & MASK_I_AUD) + tc358743_hdmi_audio_int_handler(sd, handled); + + i2c_wr16(sd, INTSTATUS, MASK_HDMI_INT); + intstatus &= ~MASK_HDMI_INT; + } + +#ifdef CONFIG_VIDEO_TC358743_CEC + if (intstatus & (MASK_CEC_RINT | MASK_CEC_TINT)) { + tc358743_cec_handler(sd, intstatus, handled); + i2c_wr16(sd, INTSTATUS, + intstatus & (MASK_CEC_RINT | MASK_CEC_TINT)); + intstatus &= ~(MASK_CEC_RINT | MASK_CEC_TINT); + } +#endif + + if (intstatus & MASK_CSI_INT) { + u32 csi_int = i2c_rd32(sd, CSI_INT); + + if (csi_int & MASK_INTER) + tc358743_csi_err_int_handler(sd, handled); + + i2c_wr16(sd, INTSTATUS, MASK_CSI_INT); + } + + intstatus = i2c_rd16(sd, INTSTATUS); + if (intstatus) { + v4l2_dbg(1, debug, sd, + "%s: Unhandled IntStatus interrupts: 0x%02x\n", + __func__, intstatus); + } + + return 0; +} + +static irqreturn_t tc358743_irq_handler(int irq, void *dev_id) +{ + struct tc358743_state *state = dev_id; + bool handled = false; + + tc358743_isr(&state->sd, 0, &handled); + + return handled ? IRQ_HANDLED : IRQ_NONE; +} + +static void tc358743_irq_poll_timer(struct timer_list *t) +{ + struct tc358743_state *state = from_timer(state, t, timer); + unsigned int msecs; + + schedule_work(&state->work_i2c_poll); + /* + * If CEC is present, then we need to poll more frequently, + * otherwise we will miss CEC messages. + */ + msecs = state->cec_adap ? POLL_INTERVAL_CEC_MS : POLL_INTERVAL_MS; + mod_timer(&state->timer, jiffies + msecs_to_jiffies(msecs)); +} + +static void tc358743_work_i2c_poll(struct work_struct *work) +{ + struct tc358743_state *state = container_of(work, + struct tc358743_state, work_i2c_poll); + bool handled; + + tc358743_isr(&state->sd, 0, &handled); +} + +static int tc358743_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh, + struct v4l2_event_subscription *sub) +{ + switch (sub->type) { + case V4L2_EVENT_SOURCE_CHANGE: + return v4l2_src_change_event_subdev_subscribe(sd, fh, sub); + case V4L2_EVENT_CTRL: + return v4l2_ctrl_subdev_subscribe_event(sd, fh, sub); + default: + return -EINVAL; + } +} + +/* --------------- VIDEO OPS --------------- */ + +static int tc358743_g_input_status(struct v4l2_subdev *sd, u32 *status) +{ + *status = 0; + *status |= no_signal(sd) ? V4L2_IN_ST_NO_SIGNAL : 0; + *status |= no_sync(sd) ? V4L2_IN_ST_NO_SYNC : 0; + + v4l2_dbg(1, debug, sd, "%s: status = 0x%x\n", __func__, *status); + + return 0; +} + +static int tc358743_s_dv_timings(struct v4l2_subdev *sd, + struct v4l2_dv_timings *timings) +{ + struct tc358743_state *state = to_state(sd); + + if (!timings) + return -EINVAL; + + if (debug) + v4l2_print_dv_timings(sd->name, "tc358743_s_dv_timings: ", + timings, false); + + if (v4l2_match_dv_timings(&state->timings, timings, 0, false)) { + v4l2_dbg(1, debug, sd, "%s: no change\n", __func__); + return 0; + } + + if (!v4l2_valid_dv_timings(timings, + &tc358743_timings_cap, NULL, NULL)) { + v4l2_dbg(1, debug, sd, "%s: timings out of range\n", __func__); + return -ERANGE; + } + + state->timings = *timings; + + enable_stream(sd, false); + tc358743_set_pll(sd); + tc358743_set_csi(sd); + + return 0; +} + +static int tc358743_g_dv_timings(struct v4l2_subdev *sd, + struct v4l2_dv_timings *timings) +{ + struct tc358743_state *state = to_state(sd); + + *timings = state->timings; + + return 0; +} + +static int tc358743_enum_dv_timings(struct v4l2_subdev *sd, + struct v4l2_enum_dv_timings *timings) +{ + if (timings->pad != 0) + return -EINVAL; + + return v4l2_enum_dv_timings_cap(timings, + &tc358743_timings_cap, NULL, NULL); +} + +static int tc358743_query_dv_timings(struct v4l2_subdev *sd, + struct v4l2_dv_timings *timings) +{ + int ret; + + ret = tc358743_get_detected_timings(sd, timings); + if (ret) + return ret; + + if (debug) + v4l2_print_dv_timings(sd->name, "tc358743_query_dv_timings: ", + timings, false); + + if (!v4l2_valid_dv_timings(timings, + &tc358743_timings_cap, NULL, NULL)) { + v4l2_dbg(1, debug, sd, "%s: timings out of range\n", __func__); + return -ERANGE; + } + + return 0; +} + +static int tc358743_dv_timings_cap(struct v4l2_subdev *sd, + struct v4l2_dv_timings_cap *cap) +{ + if (cap->pad != 0) + return -EINVAL; + + *cap = tc358743_timings_cap; + + return 0; +} + +static int tc358743_get_mbus_config(struct v4l2_subdev *sd, + unsigned int pad, + struct v4l2_mbus_config *cfg) +{ + struct tc358743_state *state = to_state(sd); + + cfg->type = V4L2_MBUS_CSI2_DPHY; + + /* Support for non-continuous CSI-2 clock is missing in the driver */ + cfg->bus.mipi_csi2.flags = 0; + cfg->bus.mipi_csi2.num_data_lanes = state->csi_lanes_in_use; + + return 0; +} + +static int tc358743_s_stream(struct v4l2_subdev *sd, int enable) +{ + enable_stream(sd, enable); + if (!enable) { + /* Put all lanes in LP-11 state (STOPSTATE) */ + tc358743_set_csi(sd); + } + + return 0; +} + +/* --------------- PAD OPS --------------- */ + +static int tc358743_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_mbus_code_enum *code) +{ + switch (code->index) { + case 0: + code->code = MEDIA_BUS_FMT_RGB888_1X24; + break; + case 1: + code->code = MEDIA_BUS_FMT_UYVY8_1X16; + break; + default: + return -EINVAL; + } + return 0; +} + +static int tc358743_get_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_format *format) +{ + struct tc358743_state *state = to_state(sd); + u8 vi_rep = i2c_rd8(sd, VI_REP); + + if (format->pad != 0) + return -EINVAL; + + format->format.code = state->mbus_fmt_code; + format->format.width = state->timings.bt.width; + format->format.height = state->timings.bt.height; + format->format.field = V4L2_FIELD_NONE; + + switch (vi_rep & MASK_VOUT_COLOR_SEL) { + case MASK_VOUT_COLOR_RGB_FULL: + case MASK_VOUT_COLOR_RGB_LIMITED: + format->format.colorspace = V4L2_COLORSPACE_SRGB; + break; + case MASK_VOUT_COLOR_601_YCBCR_LIMITED: + case MASK_VOUT_COLOR_601_YCBCR_FULL: + format->format.colorspace = V4L2_COLORSPACE_SMPTE170M; + break; + case MASK_VOUT_COLOR_709_YCBCR_FULL: + case MASK_VOUT_COLOR_709_YCBCR_LIMITED: + format->format.colorspace = V4L2_COLORSPACE_REC709; + break; + default: + format->format.colorspace = 0; + break; + } + + return 0; +} + +static int tc358743_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_state *sd_state, + struct v4l2_subdev_format *format) +{ + struct tc358743_state *state = to_state(sd); + + u32 code = format->format.code; /* is overwritten by get_fmt */ + int ret = tc358743_get_fmt(sd, sd_state, format); + + format->format.code = code; + + if (ret) + return ret; + + switch (code) { + case MEDIA_BUS_FMT_RGB888_1X24: + case MEDIA_BUS_FMT_UYVY8_1X16: + break; + default: + return -EINVAL; + } + + if (format->which == V4L2_SUBDEV_FORMAT_TRY) + return 0; + + state->mbus_fmt_code = format->format.code; + + enable_stream(sd, false); + tc358743_set_pll(sd); + tc358743_set_csi(sd); + tc358743_set_csi_color_space(sd); + + return 0; +} + +static int tc358743_g_edid(struct v4l2_subdev *sd, + struct v4l2_subdev_edid *edid) +{ + struct tc358743_state *state = to_state(sd); + + memset(edid->reserved, 0, sizeof(edid->reserved)); + + if (edid->pad != 0) + return -EINVAL; + + if (edid->start_block == 0 && edid->blocks == 0) { + edid->blocks = state->edid_blocks_written; + return 0; + } + + if (state->edid_blocks_written == 0) + return -ENODATA; + + if (edid->start_block >= state->edid_blocks_written || + edid->blocks == 0) + return -EINVAL; + + if (edid->start_block + edid->blocks > state->edid_blocks_written) + edid->blocks = state->edid_blocks_written - edid->start_block; + + i2c_rd(sd, EDID_RAM + (edid->start_block * EDID_BLOCK_SIZE), edid->edid, + edid->blocks * EDID_BLOCK_SIZE); + + return 0; +} + +static int tc358743_s_edid(struct v4l2_subdev *sd, + struct v4l2_subdev_edid *edid) +{ + struct tc358743_state *state = to_state(sd); + u16 edid_len = edid->blocks * EDID_BLOCK_SIZE; + u16 pa; + int err; + int i; + + v4l2_dbg(2, debug, sd, "%s, pad %d, start block %d, blocks %d\n", + __func__, edid->pad, edid->start_block, edid->blocks); + + memset(edid->reserved, 0, sizeof(edid->reserved)); + + if (edid->pad != 0) + return -EINVAL; + + if (edid->start_block != 0) + return -EINVAL; + + if (edid->blocks > EDID_NUM_BLOCKS_MAX) { + edid->blocks = EDID_NUM_BLOCKS_MAX; + return -E2BIG; + } + pa = cec_get_edid_phys_addr(edid->edid, edid->blocks * 128, NULL); + err = v4l2_phys_addr_validate(pa, &pa, NULL); + if (err) + return err; + + cec_phys_addr_invalidate(state->cec_adap); + + tc358743_disable_edid(sd); + + i2c_wr8(sd, EDID_LEN1, edid_len & 0xff); + i2c_wr8(sd, EDID_LEN2, edid_len >> 8); + + if (edid->blocks == 0) { + state->edid_blocks_written = 0; + return 0; + } + + for (i = 0; i < edid_len; i += EDID_BLOCK_SIZE) + i2c_wr(sd, EDID_RAM + i, edid->edid + i, EDID_BLOCK_SIZE); + + state->edid_blocks_written = edid->blocks; + + cec_s_phys_addr(state->cec_adap, pa, false); + + if (tx_5v_power_present(sd)) + tc358743_enable_edid(sd); + + return 0; +} + +/* -------------------------------------------------------------------------- */ + +static const struct v4l2_subdev_core_ops tc358743_core_ops = { + .log_status = tc358743_log_status, +#ifdef CONFIG_VIDEO_ADV_DEBUG + .g_register = tc358743_g_register, + .s_register = tc358743_s_register, +#endif + .interrupt_service_routine = tc358743_isr, + .subscribe_event = tc358743_subscribe_event, + .unsubscribe_event = v4l2_event_subdev_unsubscribe, +}; + +static const struct v4l2_subdev_video_ops tc358743_video_ops = { + .g_input_status = tc358743_g_input_status, + .s_dv_timings = tc358743_s_dv_timings, + .g_dv_timings = tc358743_g_dv_timings, + .query_dv_timings = tc358743_query_dv_timings, + .s_stream = tc358743_s_stream, +}; + +static const struct v4l2_subdev_pad_ops tc358743_pad_ops = { + .enum_mbus_code = tc358743_enum_mbus_code, + .set_fmt = tc358743_set_fmt, + .get_fmt = tc358743_get_fmt, + .get_edid = tc358743_g_edid, + .set_edid = tc358743_s_edid, + .enum_dv_timings = tc358743_enum_dv_timings, + .dv_timings_cap = tc358743_dv_timings_cap, + .get_mbus_config = tc358743_get_mbus_config, +}; + +static const struct v4l2_subdev_ops tc358743_ops = { + .core = &tc358743_core_ops, + .video = &tc358743_video_ops, + .pad = &tc358743_pad_ops, +}; + +/* --------------- CUSTOM CTRLS --------------- */ + +static const struct v4l2_ctrl_config tc358743_ctrl_audio_sampling_rate = { + .id = TC358743_CID_AUDIO_SAMPLING_RATE, + .name = "Audio sampling rate", + .type = V4L2_CTRL_TYPE_INTEGER, + .min = 0, + .max = 768000, + .step = 1, + .def = 0, + .flags = V4L2_CTRL_FLAG_READ_ONLY, +}; + +static const struct v4l2_ctrl_config tc358743_ctrl_audio_present = { + .id = TC358743_CID_AUDIO_PRESENT, + .name = "Audio present", + .type = V4L2_CTRL_TYPE_BOOLEAN, + .min = 0, + .max = 1, + .step = 1, + .def = 0, + .flags = V4L2_CTRL_FLAG_READ_ONLY, +}; + +/* --------------- PROBE / REMOVE --------------- */ + +#ifdef CONFIG_OF +static void tc358743_gpio_reset(struct tc358743_state *state) +{ + usleep_range(5000, 10000); + gpiod_set_value(state->reset_gpio, 1); + usleep_range(1000, 2000); + gpiod_set_value(state->reset_gpio, 0); + msleep(20); +} + +static int tc358743_probe_of(struct tc358743_state *state) +{ + struct device *dev = &state->i2c_client->dev; + struct v4l2_fwnode_endpoint endpoint = { .bus_type = 0 }; + struct device_node *ep; + struct clk *refclk; + u32 bps_pr_lane; + int ret; + + refclk = devm_clk_get(dev, "refclk"); + if (IS_ERR(refclk)) { + if (PTR_ERR(refclk) != -EPROBE_DEFER) + dev_err(dev, "failed to get refclk: %ld\n", + PTR_ERR(refclk)); + return PTR_ERR(refclk); + } + + ep = of_graph_get_next_endpoint(dev->of_node, NULL); + if (!ep) { + dev_err(dev, "missing endpoint node\n"); + return -EINVAL; + } + + ret = v4l2_fwnode_endpoint_alloc_parse(of_fwnode_handle(ep), &endpoint); + if (ret) { + dev_err(dev, "failed to parse endpoint\n"); + goto put_node; + } + + if (endpoint.bus_type != V4L2_MBUS_CSI2_DPHY || + endpoint.bus.mipi_csi2.num_data_lanes == 0 || + endpoint.nr_of_link_frequencies == 0) { + dev_err(dev, "missing CSI-2 properties in endpoint\n"); + ret = -EINVAL; + goto free_endpoint; + } + + if (endpoint.bus.mipi_csi2.num_data_lanes > 4) { + dev_err(dev, "invalid number of lanes\n"); + ret = -EINVAL; + goto free_endpoint; + } + + state->bus = endpoint.bus.mipi_csi2; + + ret = clk_prepare_enable(refclk); + if (ret) { + dev_err(dev, "Failed! to enable clock\n"); + goto free_endpoint; + } + + state->pdata.refclk_hz = clk_get_rate(refclk); + state->pdata.ddc5v_delay = DDC5V_DELAY_100_MS; + state->pdata.enable_hdcp = false; + /* A FIFO level of 16 should be enough for 2-lane 720p60 at 594 MHz. */ + state->pdata.fifo_level = 16; + /* + * The PLL input clock is obtained by dividing refclk by pll_prd. + * It must be between 6 MHz and 40 MHz, lower frequency is better. + */ + switch (state->pdata.refclk_hz) { + case 26000000: + case 27000000: + case 42000000: + state->pdata.pll_prd = state->pdata.refclk_hz / 6000000; + break; + default: + dev_err(dev, "unsupported refclk rate: %u Hz\n", + state->pdata.refclk_hz); + goto disable_clk; + } + + /* + * The CSI bps per lane must be between 62.5 Mbps and 1 Gbps. + * The default is 594 Mbps for 4-lane 1080p60 or 2-lane 720p60. + */ + bps_pr_lane = 2 * endpoint.link_frequencies[0]; + if (bps_pr_lane < 62500000U || bps_pr_lane > 1000000000U) { + dev_err(dev, "unsupported bps per lane: %u bps\n", bps_pr_lane); + ret = -EINVAL; + goto disable_clk; + } + + /* The CSI speed per lane is refclk / pll_prd * pll_fbd */ + state->pdata.pll_fbd = bps_pr_lane / + state->pdata.refclk_hz * state->pdata.pll_prd; + + /* + * FIXME: These timings are from REF_02 for 594 Mbps per lane (297 MHz + * link frequency). In principle it should be possible to calculate + * them based on link frequency and resolution. + */ + if (bps_pr_lane != 594000000U) + dev_warn(dev, "untested bps per lane: %u bps\n", bps_pr_lane); + state->pdata.lineinitcnt = 0xe80; + state->pdata.lptxtimecnt = 0x003; + /* tclk-preparecnt: 3, tclk-zerocnt: 20 */ + state->pdata.tclk_headercnt = 0x1403; + state->pdata.tclk_trailcnt = 0x00; + /* ths-preparecnt: 3, ths-zerocnt: 1 */ + state->pdata.ths_headercnt = 0x0103; + state->pdata.twakeup = 0x4882; + state->pdata.tclk_postcnt = 0x008; + state->pdata.ths_trailcnt = 0x2; + state->pdata.hstxvregcnt = 0; + + state->reset_gpio = devm_gpiod_get_optional(dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(state->reset_gpio)) { + dev_err(dev, "failed to get reset gpio\n"); + ret = PTR_ERR(state->reset_gpio); + goto disable_clk; + } + + if (state->reset_gpio) + tc358743_gpio_reset(state); + + ret = 0; + goto free_endpoint; + +disable_clk: + clk_disable_unprepare(refclk); +free_endpoint: + v4l2_fwnode_endpoint_free(&endpoint); +put_node: + of_node_put(ep); + return ret; +} +#else +static inline int tc358743_probe_of(struct tc358743_state *state) +{ + return -ENODEV; +} +#endif + +static int tc358743_probe(struct i2c_client *client) +{ + static struct v4l2_dv_timings default_timing = + V4L2_DV_BT_CEA_640X480P59_94; + struct tc358743_state *state; + struct tc358743_platform_data *pdata = client->dev.platform_data; + struct v4l2_subdev *sd; + u16 irq_mask = MASK_HDMI_MSK | MASK_CSI_MSK; + int err; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -EIO; + v4l_dbg(1, debug, client, "chip found @ 0x%x (%s)\n", + client->addr << 1, client->adapter->name); + + state = devm_kzalloc(&client->dev, sizeof(struct tc358743_state), + GFP_KERNEL); + if (!state) + return -ENOMEM; + + state->i2c_client = client; + + /* platform data */ + if (pdata) { + state->pdata = *pdata; + state->bus.flags = 0; + } else { + err = tc358743_probe_of(state); + if (err == -ENODEV) + v4l_err(client, "No platform data!\n"); + if (err) + return err; + } + + sd = &state->sd; + v4l2_i2c_subdev_init(sd, client, &tc358743_ops); + sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; + + /* i2c access */ + if ((i2c_rd16(sd, CHIPID) & MASK_CHIPID) != 0) { + v4l2_info(sd, "not a TC358743 on address 0x%x\n", + client->addr << 1); + return -ENODEV; + } + + /* control handlers */ + v4l2_ctrl_handler_init(&state->hdl, 3); + + state->detect_tx_5v_ctrl = v4l2_ctrl_new_std(&state->hdl, NULL, + V4L2_CID_DV_RX_POWER_PRESENT, 0, 1, 0, 0); + + /* custom controls */ + state->audio_sampling_rate_ctrl = v4l2_ctrl_new_custom(&state->hdl, + &tc358743_ctrl_audio_sampling_rate, NULL); + + state->audio_present_ctrl = v4l2_ctrl_new_custom(&state->hdl, + &tc358743_ctrl_audio_present, NULL); + + sd->ctrl_handler = &state->hdl; + if (state->hdl.error) { + err = state->hdl.error; + goto err_hdl; + } + + if (tc358743_update_controls(sd)) { + err = -ENODEV; + goto err_hdl; + } + + state->pad.flags = MEDIA_PAD_FL_SOURCE; + sd->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE; + err = media_entity_pads_init(&sd->entity, 1, &state->pad); + if (err < 0) + goto err_hdl; + + state->mbus_fmt_code = MEDIA_BUS_FMT_RGB888_1X24; + + sd->dev = &client->dev; + err = v4l2_async_register_subdev(sd); + if (err < 0) + goto err_hdl; + + mutex_init(&state->confctl_mutex); + + INIT_DELAYED_WORK(&state->delayed_work_enable_hotplug, + tc358743_delayed_work_enable_hotplug); + +#ifdef CONFIG_VIDEO_TC358743_CEC + state->cec_adap = cec_allocate_adapter(&tc358743_cec_adap_ops, + state, dev_name(&client->dev), + CEC_CAP_DEFAULTS | CEC_CAP_MONITOR_ALL, CEC_MAX_LOG_ADDRS); + if (IS_ERR(state->cec_adap)) { + err = PTR_ERR(state->cec_adap); + goto err_hdl; + } + irq_mask |= MASK_CEC_RMSK | MASK_CEC_TMSK; +#endif + + tc358743_initial_setup(sd); + + tc358743_s_dv_timings(sd, &default_timing); + + tc358743_set_csi_color_space(sd); + + tc358743_init_interrupts(sd); + + if (state->i2c_client->irq) { + err = devm_request_threaded_irq(&client->dev, + state->i2c_client->irq, + NULL, tc358743_irq_handler, + IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + "tc358743", state); + if (err) + goto err_work_queues; + } else { + INIT_WORK(&state->work_i2c_poll, + tc358743_work_i2c_poll); + timer_setup(&state->timer, tc358743_irq_poll_timer, 0); + state->timer.expires = jiffies + + msecs_to_jiffies(POLL_INTERVAL_MS); + add_timer(&state->timer); + } + + err = cec_register_adapter(state->cec_adap, &client->dev); + if (err < 0) { + pr_err("%s: failed to register the cec device\n", __func__); + cec_delete_adapter(state->cec_adap); + state->cec_adap = NULL; + goto err_work_queues; + } + + tc358743_enable_interrupts(sd, tx_5v_power_present(sd)); + i2c_wr16(sd, INTMASK, ~irq_mask); + + err = v4l2_ctrl_handler_setup(sd->ctrl_handler); + if (err) + goto err_work_queues; + + v4l2_info(sd, "%s found @ 0x%x (%s)\n", client->name, + client->addr << 1, client->adapter->name); + + return 0; + +err_work_queues: + cec_unregister_adapter(state->cec_adap); + if (!state->i2c_client->irq) + flush_work(&state->work_i2c_poll); + cancel_delayed_work(&state->delayed_work_enable_hotplug); + mutex_destroy(&state->confctl_mutex); +err_hdl: + media_entity_cleanup(&sd->entity); + v4l2_ctrl_handler_free(&state->hdl); + return err; +} + +static void tc358743_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct tc358743_state *state = to_state(sd); + + if (!state->i2c_client->irq) { + del_timer_sync(&state->timer); + flush_work(&state->work_i2c_poll); + } + cancel_delayed_work_sync(&state->delayed_work_enable_hotplug); + cec_unregister_adapter(state->cec_adap); + v4l2_async_unregister_subdev(sd); + v4l2_device_unregister_subdev(sd); + mutex_destroy(&state->confctl_mutex); + media_entity_cleanup(&sd->entity); + v4l2_ctrl_handler_free(&state->hdl); +} + +static const struct i2c_device_id tc358743_id[] = { + {"tc358743", 0}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, tc358743_id); + +#if IS_ENABLED(CONFIG_OF) +static const struct of_device_id tc358743_of_match[] = { + { .compatible = "toshiba,tc358743" }, + {}, +}; +MODULE_DEVICE_TABLE(of, tc358743_of_match); +#endif + +static struct i2c_driver tc358743_driver = { + .driver = { + .name = "tc358743", + .of_match_table = of_match_ptr(tc358743_of_match), + }, + .probe_new = tc358743_probe, + .remove = tc358743_remove, + .id_table = tc358743_id, +}; + +module_i2c_driver(tc358743_driver); |