From 41a523735d6ae81cb7c67f624223b241cabfc35c Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Mon, 7 Sep 2015 08:12:57 -0300 Subject: [media] cec: adv7604: add cec support Add CEC support to the adv7604 driver. Signed-off-by: Hans Verkuil [k.debski@samsung.com: Merged changes from CEC Updates commit by Hans Verkuil] [k.debski@samsung.com: add missing methods cec/io_write_and_or] [k.debski@samsung.com: change adv7604 to adv76xx in added functions] [hansverk@cisco.com: use _clr_set instead of _and_or] Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/Kconfig | 8 ++ drivers/media/i2c/adv7604.c | 332 +++++++++++++++++++++++++++++++++++++++----- 2 files changed, 304 insertions(+), 36 deletions(-) (limited to 'drivers/media/i2c') diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 993dc50..a2c44cb 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -209,6 +209,7 @@ config VIDEO_ADV7604 depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API depends on GPIOLIB || COMPILE_TEST select HDMI + select MEDIA_CEC_EDID ---help--- Support for the Analog Devices ADV7604 video decoder. @@ -218,6 +219,13 @@ config VIDEO_ADV7604 To compile this driver as a module, choose M here: the module will be called adv7604. +config VIDEO_ADV7604_CEC + bool "Enable Analog Devices ADV7604 CEC support" + depends on VIDEO_ADV7604 && MEDIA_CEC + ---help--- + When selected the adv7604 will support the optional + HDMI CEC feature. + config VIDEO_ADV7842 tristate "Analog Devices ADV7842 decoder" depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c index beb2841..3c9f001 100644 --- a/drivers/media/i2c/adv7604.c +++ b/drivers/media/i2c/adv7604.c @@ -40,6 +40,7 @@ #include #include +#include #include #include #include @@ -80,6 +81,8 @@ MODULE_LICENSE("GPL"); #define ADV76XX_OP_SWAP_CB_CR (1 << 0) +#define ADV76XX_MAX_ADDRS (3) + enum adv76xx_type { ADV7604, ADV7611, @@ -184,6 +187,12 @@ struct adv76xx_state { u16 spa_port_a[2]; struct v4l2_fract aspect_ratio; u32 rgb_quantization_range; + + struct cec_adapter *cec_adap; + u8 cec_addr[ADV76XX_MAX_ADDRS]; + u8 cec_valid_addrs; + bool cec_enabled_adap; + struct workqueue_struct *work_queues; struct delayed_work delayed_work_enable_hotplug; bool restart_stdi_once; @@ -381,7 +390,8 @@ static inline int io_write(struct v4l2_subdev *sd, u8 reg, u8 val) return regmap_write(state->regmap[ADV76XX_PAGE_IO], reg, val); } -static inline int io_write_clr_set(struct v4l2_subdev *sd, u8 reg, u8 mask, u8 val) +static inline int io_write_clr_set(struct v4l2_subdev *sd, u8 reg, u8 mask, + u8 val) { return io_write(sd, reg, (io_read(sd, reg) & ~mask) | val); } @@ -414,6 +424,12 @@ static inline int cec_write(struct v4l2_subdev *sd, u8 reg, u8 val) return regmap_write(state->regmap[ADV76XX_PAGE_CEC], reg, val); } +static inline int cec_write_clr_set(struct v4l2_subdev *sd, u8 reg, u8 mask, + u8 val) +{ + return cec_write(sd, reg, (cec_read(sd, reg) & ~mask) | val); +} + static inline int infoframe_read(struct v4l2_subdev *sd, u8 reg) { struct adv76xx_state *state = to_state(sd); @@ -872,9 +888,9 @@ static int adv76xx_s_detect_tx_5v_ctrl(struct v4l2_subdev *sd) { struct adv76xx_state *state = to_state(sd); const struct adv76xx_chip_info *info = state->info; + u16 cable_det = info->read_cable_det(sd); - return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl, - info->read_cable_det(sd)); + return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl, cable_det); } static int find_and_set_predefined_video_timings(struct v4l2_subdev *sd, @@ -1900,6 +1916,210 @@ static int adv76xx_set_format(struct v4l2_subdev *sd, return 0; } +#if IS_ENABLED(CONFIG_VIDEO_ADV7604_CEC) +static void adv76xx_cec_tx_raw_status(struct v4l2_subdev *sd, u8 tx_raw_status) +{ + struct adv76xx_state *state = to_state(sd); + + if ((cec_read(sd, 0x11) & 0x01) == 0) { + v4l2_dbg(1, debug, sd, "%s: tx raw: tx disabled\n", __func__); + return; + } + + if (tx_raw_status & 0x02) { + v4l2_dbg(1, debug, sd, "%s: tx raw: arbitration lost\n", + __func__); + cec_transmit_done(state->cec_adap, CEC_TX_STATUS_ARB_LOST, + 1, 0, 0, 0); + } + if (tx_raw_status & 0x04) { + u8 status; + u8 nack_cnt; + u8 low_drive_cnt; + + v4l2_dbg(1, debug, sd, "%s: tx raw: retry failed\n", __func__); + /* + * We set this status bit since this hardware performs + * retransmissions. + */ + status = CEC_TX_STATUS_MAX_RETRIES; + nack_cnt = cec_read(sd, 0x14) & 0xf; + if (nack_cnt) + status |= CEC_TX_STATUS_NACK; + low_drive_cnt = cec_read(sd, 0x14) >> 4; + if (low_drive_cnt) + status |= CEC_TX_STATUS_LOW_DRIVE; + cec_transmit_done(state->cec_adap, status, + 0, nack_cnt, low_drive_cnt, 0); + return; + } + if (tx_raw_status & 0x01) { + v4l2_dbg(1, debug, sd, "%s: tx raw: ready ok\n", __func__); + cec_transmit_done(state->cec_adap, CEC_TX_STATUS_OK, 0, 0, 0, 0); + return; + } +} + +static void adv76xx_cec_isr(struct v4l2_subdev *sd, bool *handled) +{ + struct adv76xx_state *state = to_state(sd); + u8 cec_irq; + + /* cec controller */ + cec_irq = io_read(sd, 0x4d) & 0x0f; + if (!cec_irq) + return; + + v4l2_dbg(1, debug, sd, "%s: cec: irq 0x%x\n", __func__, cec_irq); + adv76xx_cec_tx_raw_status(sd, cec_irq); + if (cec_irq & 0x08) { + struct cec_msg msg; + + msg.len = cec_read(sd, 0x25) & 0x1f; + if (msg.len > 16) + msg.len = 16; + + if (msg.len) { + u8 i; + + for (i = 0; i < msg.len; i++) + msg.msg[i] = cec_read(sd, i + 0x15); + cec_write(sd, 0x26, 0x01); /* re-enable rx */ + cec_received_msg(state->cec_adap, &msg); + } + } + + /* note: the bit order is swapped between 0x4d and 0x4e */ + cec_irq = ((cec_irq & 0x08) >> 3) | ((cec_irq & 0x04) >> 1) | + ((cec_irq & 0x02) << 1) | ((cec_irq & 0x01) << 3); + io_write(sd, 0x4e, cec_irq); + + if (handled) + *handled = true; +} + +static int adv76xx_cec_adap_enable(struct cec_adapter *adap, bool enable) +{ + struct adv76xx_state *state = adap->priv; + struct v4l2_subdev *sd = &state->sd; + + if (!state->cec_enabled_adap && enable) { + cec_write_clr_set(sd, 0x2a, 0x01, 0x01); /* power up cec */ + cec_write(sd, 0x2c, 0x01); /* cec soft reset */ + cec_write_clr_set(sd, 0x11, 0x01, 0); /* initially disable tx */ + /* enabled irqs: */ + /* tx: ready */ + /* tx: arbitration lost */ + /* tx: retry timeout */ + /* rx: ready */ + io_write_clr_set(sd, 0x50, 0x0f, 0x0f); + cec_write(sd, 0x26, 0x01); /* enable rx */ + } else if (state->cec_enabled_adap && !enable) { + /* disable cec interrupts */ + io_write_clr_set(sd, 0x50, 0x0f, 0x00); + /* disable address mask 1-3 */ + cec_write_clr_set(sd, 0x27, 0x70, 0x00); + /* power down cec section */ + cec_write_clr_set(sd, 0x2a, 0x01, 0x00); + state->cec_valid_addrs = 0; + } + state->cec_enabled_adap = enable; + adv76xx_s_detect_tx_5v_ctrl(sd); + return 0; +} + +static int adv76xx_cec_adap_log_addr(struct cec_adapter *adap, u8 addr) +{ + struct adv76xx_state *state = adap->priv; + struct v4l2_subdev *sd = &state->sd; + unsigned int i, free_idx = ADV76XX_MAX_ADDRS; + + if (!state->cec_enabled_adap) + return addr == CEC_LOG_ADDR_INVALID ? 0 : -EIO; + + if (addr == CEC_LOG_ADDR_INVALID) { + cec_write_clr_set(sd, 0x27, 0x70, 0); + state->cec_valid_addrs = 0; + return 0; + } + + for (i = 0; i < ADV76XX_MAX_ADDRS; i++) { + bool is_valid = state->cec_valid_addrs & (1 << i); + + if (free_idx == ADV76XX_MAX_ADDRS && !is_valid) + free_idx = i; + if (is_valid && state->cec_addr[i] == addr) + return 0; + } + if (i == ADV76XX_MAX_ADDRS) { + i = free_idx; + if (i == ADV76XX_MAX_ADDRS) + return -ENXIO; + } + state->cec_addr[i] = addr; + state->cec_valid_addrs |= 1 << i; + + switch (i) { + case 0: + /* enable address mask 0 */ + cec_write_clr_set(sd, 0x27, 0x10, 0x10); + /* set address for mask 0 */ + cec_write_clr_set(sd, 0x28, 0x0f, addr); + break; + case 1: + /* enable address mask 1 */ + cec_write_clr_set(sd, 0x27, 0x20, 0x20); + /* set address for mask 1 */ + cec_write_clr_set(sd, 0x28, 0xf0, addr << 4); + break; + case 2: + /* enable address mask 2 */ + cec_write_clr_set(sd, 0x27, 0x40, 0x40); + /* set address for mask 1 */ + cec_write_clr_set(sd, 0x29, 0x0f, addr); + break; + } + return 0; +} + +static int adv76xx_cec_adap_transmit(struct cec_adapter *adap, u8 attempts, + u32 signal_free_time, struct cec_msg *msg) +{ + struct adv76xx_state *state = adap->priv; + struct v4l2_subdev *sd = &state->sd; + u8 len = msg->len; + unsigned int i; + + /* + * The number of retries is the number of attempts - 1, but retry + * at least once. It's not clear if a value of 0 is allowed, so + * let's do at least one retry. + */ + cec_write_clr_set(sd, 0x12, 0x70, max(1, attempts - 1) << 4); + + if (len > 16) { + v4l2_err(sd, "%s: len exceeded 16 (%d)\n", __func__, len); + return -EINVAL; + } + + /* write data */ + for (i = 0; i < len; i++) + cec_write(sd, i, msg->msg[i]); + + /* set length (data + header) */ + cec_write(sd, 0x10, len); + /* start transmit, enable tx */ + cec_write(sd, 0x11, 0x01); + return 0; +} + +static const struct cec_adap_ops adv76xx_cec_adap_ops = { + .adap_enable = adv76xx_cec_adap_enable, + .adap_log_addr = adv76xx_cec_adap_log_addr, + .adap_transmit = adv76xx_cec_adap_transmit, +}; +#endif + static int adv76xx_isr(struct v4l2_subdev *sd, u32 status, bool *handled) { struct adv76xx_state *state = to_state(sd); @@ -1945,6 +2165,11 @@ static int adv76xx_isr(struct v4l2_subdev *sd, u32 status, bool *handled) *handled = true; } +#if IS_ENABLED(CONFIG_VIDEO_ADV7604_CEC) + /* cec */ + adv76xx_cec_isr(sd, handled); +#endif + /* tx 5v detect */ tx_5v = irq_reg_0x70 & info->cable_det_mask; if (tx_5v) { @@ -1994,39 +2219,12 @@ static int adv76xx_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid) return 0; } -static int get_edid_spa_location(const u8 *edid) -{ - u8 d; - - if ((edid[0x7e] != 1) || - (edid[0x80] != 0x02) || - (edid[0x81] != 0x03)) { - return -1; - } - - /* search Vendor Specific Data Block (tag 3) */ - d = edid[0x82] & 0x7f; - if (d > 4) { - int i = 0x84; - int end = 0x80 + d; - - do { - u8 tag = edid[i] >> 5; - u8 len = edid[i] & 0x1f; - - if ((tag == 3) && (len >= 5)) - return i + 4; - i += len + 1; - } while (i < end); - } - return -1; -} - static int adv76xx_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid) { struct adv76xx_state *state = to_state(sd); const struct adv76xx_chip_info *info = state->info; - int spa_loc; + unsigned int spa_loc; + u16 pa; int err; int i; @@ -2057,6 +2255,10 @@ static int adv76xx_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid) edid->blocks = 2; return -E2BIG; } + pa = cec_get_edid_phys_addr(edid->edid, edid->blocks * 128, &spa_loc); + err = cec_phys_addr_validate(pa, &pa, NULL); + if (err) + return err; v4l2_dbg(2, debug, sd, "%s: write EDID pad %d, edid.present = 0x%x\n", __func__, edid->pad, state->edid.present); @@ -2066,9 +2268,12 @@ static int adv76xx_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid) adv76xx_set_hpd(state, 0); rep_write_clr_set(sd, info->edid_enable_reg, 0x0f, 0x00); - spa_loc = get_edid_spa_location(edid->edid); - if (spa_loc < 0) - spa_loc = 0xc0; /* Default value [REF_02, p. 116] */ + /* + * Return an error if no location of the source physical address + * was found. + */ + if (spa_loc == 0) + return -EINVAL; switch (edid->pad) { case ADV76XX_PAD_HDMI_PORT_A: @@ -2128,6 +2333,7 @@ static int adv76xx_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid) v4l2_err(sd, "error enabling edid (0x%x)\n", state->edid.present); return -EIO; } + cec_s_phys_addr(state->cec_adap, pa, false); /* enable hotplug after 100 ms */ queue_delayed_work(state->work_queues, @@ -2252,8 +2458,19 @@ static int adv76xx_log_status(struct v4l2_subdev *sd) ((edid_enabled & 0x02) ? "Yes" : "No"), ((edid_enabled & 0x04) ? "Yes" : "No"), ((edid_enabled & 0x08) ? "Yes" : "No")); - v4l2_info(sd, "CEC: %s\n", !!(cec_read(sd, 0x2a) & 0x01) ? + v4l2_info(sd, "CEC: %s\n", state->cec_enabled_adap ? "enabled" : "disabled"); + if (state->cec_enabled_adap) { + int i; + + for (i = 0; i < ADV76XX_MAX_ADDRS; i++) { + bool is_valid = state->cec_valid_addrs & (1 << i); + + if (is_valid) + v4l2_info(sd, "CEC Logical Address: 0x%x\n", + state->cec_addr[i]); + } + } v4l2_info(sd, "-----Signal status-----\n"); cable_det = info->read_cable_det(sd); @@ -2363,6 +2580,24 @@ static int adv76xx_subscribe_event(struct v4l2_subdev *sd, } } +static int adv76xx_registered(struct v4l2_subdev *sd) +{ + struct adv76xx_state *state = to_state(sd); + int err; + + err = cec_register_adapter(state->cec_adap); + if (err) + cec_delete_adapter(state->cec_adap); + return err; +} + +static void adv76xx_unregistered(struct v4l2_subdev *sd) +{ + struct adv76xx_state *state = to_state(sd); + + cec_unregister_adapter(state->cec_adap); +} + /* ----------------------------------------------------------------------- */ static const struct v4l2_ctrl_ops adv76xx_ctrl_ops = { @@ -2406,6 +2641,11 @@ static const struct v4l2_subdev_ops adv76xx_ops = { .pad = &adv76xx_pad_ops, }; +static const struct v4l2_subdev_internal_ops adv76xx_int_ops = { + .registered = adv76xx_registered, + .unregistered = adv76xx_unregistered, +}; + /* -------------------------- custom ctrls ---------------------------------- */ static const struct v4l2_ctrl_config adv7604_ctrl_analog_sampling_phase = { @@ -3069,6 +3309,7 @@ static int adv76xx_probe(struct i2c_client *client, id->name, i2c_adapter_id(client->adapter), client->addr); sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; + sd->internal_ops = &adv76xx_int_ops; /* Configure IO Regmap region */ err = configure_regmap(state, ADV76XX_PAGE_IO); @@ -3212,6 +3453,18 @@ static int adv76xx_probe(struct i2c_client *client, err = adv76xx_core_init(sd); if (err) goto err_entity; + +#if IS_ENABLED(CONFIG_VIDEO_ADV7604_CEC) + state->cec_adap = cec_allocate_adapter(&adv76xx_cec_adap_ops, + state, dev_name(&client->dev), + CEC_CAP_TRANSMIT | CEC_CAP_LOG_ADDRS | + CEC_CAP_PASSTHROUGH | CEC_CAP_RC, ADV76XX_MAX_ADDRS, + &client->dev); + err = PTR_ERR_OR_ZERO(state->cec_adap); + if (err) + goto err_entity; +#endif + v4l2_info(sd, "%s found @ 0x%x (%s)\n", client->name, client->addr << 1, client->adapter->name); @@ -3240,6 +3493,13 @@ static int adv76xx_remove(struct i2c_client *client) struct v4l2_subdev *sd = i2c_get_clientdata(client); struct adv76xx_state *state = to_state(sd); + /* disable interrupts */ + io_write(sd, 0x40, 0); + io_write(sd, 0x41, 0); + io_write(sd, 0x46, 0); + io_write(sd, 0x6e, 0); + io_write(sd, 0x73, 0); + cancel_delayed_work(&state->delayed_work_enable_hotplug); destroy_workqueue(state->work_queues); v4l2_async_unregister_subdev(sd); -- cgit v1.1 From 25c84fb1c957d25b056f2e2cc7b4ed4b2c6e4ed9 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Mon, 7 Sep 2015 08:13:26 -0300 Subject: [media] cec: adv7842: add cec support Add CEC support to the adv7842 driver. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/Kconfig | 8 + drivers/media/i2c/adv7842.c | 368 ++++++++++++++++++++++++++++++++++++-------- 2 files changed, 313 insertions(+), 63 deletions(-) (limited to 'drivers/media/i2c') diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index a2c44cb..0179d10 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -230,6 +230,7 @@ config VIDEO_ADV7842 tristate "Analog Devices ADV7842 decoder" depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API select HDMI + select MEDIA_CEC_EDID ---help--- Support for the Analog Devices ADV7842 video decoder. @@ -239,6 +240,13 @@ config VIDEO_ADV7842 To compile this driver as a module, choose M here: the module will be called adv7842. +config VIDEO_ADV7842_CEC + bool "Enable Analog Devices ADV7842 CEC support" + depends on VIDEO_ADV7842 && MEDIA_CEC + ---help--- + When selected the adv7842 will support the optional + HDMI CEC feature. + config VIDEO_BT819 tristate "BT819A VideoStream decoder" depends on VIDEO_V4L2 && I2C diff --git a/drivers/media/i2c/adv7842.c b/drivers/media/i2c/adv7842.c index ecaacb0..ad7dcfc 100644 --- a/drivers/media/i2c/adv7842.c +++ b/drivers/media/i2c/adv7842.c @@ -39,6 +39,7 @@ #include #include #include +#include #include #include #include @@ -79,6 +80,8 @@ MODULE_LICENSE("GPL"); #define ADV7842_OP_SWAP_CB_CR (1 << 0) +#define ADV7842_MAX_ADDRS (3) + /* ********************************************************************** * @@ -142,6 +145,11 @@ struct adv7842_state { struct v4l2_ctrl *free_run_color_ctrl_manual; struct v4l2_ctrl *free_run_color_ctrl; struct v4l2_ctrl *rgb_quantization_range_ctrl; + + struct cec_adapter *cec_adap; + u8 cec_addr[ADV7842_MAX_ADDRS]; + u8 cec_valid_addrs; + bool cec_enabled_adap; }; /* Unsupported timings. This device cannot support 720p30. */ @@ -418,9 +426,9 @@ static inline int cec_write(struct v4l2_subdev *sd, u8 reg, u8 val) return adv_smbus_write_byte_data(state->i2c_cec, reg, val); } -static inline int cec_write_and_or(struct v4l2_subdev *sd, u8 reg, u8 mask, u8 val) +static inline int cec_write_clr_set(struct v4l2_subdev *sd, u8 reg, u8 mask, u8 val) { - return cec_write(sd, reg, (cec_read(sd, reg) & mask) | val); + return cec_write(sd, reg, (cec_read(sd, reg) & ~mask) | val); } static inline int infoframe_read(struct v4l2_subdev *sd, u8 reg) @@ -696,6 +704,18 @@ adv7842_get_dv_timings_cap(struct v4l2_subdev *sd) /* ----------------------------------------------------------------------- */ +static u16 adv7842_read_cable_det(struct v4l2_subdev *sd) +{ + u8 reg = io_read(sd, 0x6f); + u16 val = 0; + + if (reg & 0x02) + val |= 1; /* port A */ + if (reg & 0x01) + val |= 2; /* port B */ + return val; +} + static void adv7842_delayed_work_enable_hotplug(struct work_struct *work) { struct delayed_work *dwork = to_delayed_work(work); @@ -762,50 +782,18 @@ static int edid_write_vga_segment(struct v4l2_subdev *sd) return 0; } -static int edid_spa_location(const u8 *edid) -{ - u8 d; - - /* - * TODO, improve and update for other CEA extensions - * currently only for 1 segment (256 bytes), - * i.e. 1 extension block and CEA revision 3. - */ - if ((edid[0x7e] != 1) || - (edid[0x80] != 0x02) || - (edid[0x81] != 0x03)) { - return -EINVAL; - } - /* - * search Vendor Specific Data Block (tag 3) - */ - d = edid[0x82] & 0x7f; - if (d > 4) { - int i = 0x84; - int end = 0x80 + d; - do { - u8 tag = edid[i]>>5; - u8 len = edid[i] & 0x1f; - - if ((tag == 3) && (len >= 5)) - return i + 4; - i += len + 1; - } while (i < end); - } - return -EINVAL; -} - static int edid_write_hdmi_segment(struct v4l2_subdev *sd, u8 port) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct adv7842_state *state = to_state(sd); - const u8 *val = state->hdmi_edid.edid; - int spa_loc = edid_spa_location(val); + const u8 *edid = state->hdmi_edid.edid; + int spa_loc; + u16 pa; int err = 0; int i; - v4l2_dbg(2, debug, sd, "%s: write EDID on port %c (spa at 0x%x)\n", - __func__, (port == ADV7842_EDID_PORT_A) ? 'A' : 'B', spa_loc); + v4l2_dbg(2, debug, sd, "%s: write EDID on port %c\n", + __func__, (port == ADV7842_EDID_PORT_A) ? 'A' : 'B'); /* HPA disable on port A and B */ io_write_and_or(sd, 0x20, 0xcf, 0x00); @@ -816,24 +804,33 @@ static int edid_write_hdmi_segment(struct v4l2_subdev *sd, u8 port) if (!state->hdmi_edid.present) return 0; + pa = cec_get_edid_phys_addr(edid, 256, &spa_loc); + err = cec_phys_addr_validate(pa, &pa, NULL); + if (err) + return err; + + /* + * Return an error if no location of the source physical address + * was found. + */ + if (spa_loc == 0) + return -EINVAL; + /* edid segment pointer '0' for HDMI ports */ rep_write_and_or(sd, 0x77, 0xef, 0x00); for (i = 0; !err && i < 256; i += I2C_SMBUS_BLOCK_MAX) err = adv_smbus_write_i2c_block_data(state->i2c_edid, i, - I2C_SMBUS_BLOCK_MAX, val + i); + I2C_SMBUS_BLOCK_MAX, edid + i); if (err) return err; - if (spa_loc < 0) - spa_loc = 0xc0; /* Default value [REF_02, p. 199] */ - if (port == ADV7842_EDID_PORT_A) { - rep_write(sd, 0x72, val[spa_loc]); - rep_write(sd, 0x73, val[spa_loc + 1]); + rep_write(sd, 0x72, edid[spa_loc]); + rep_write(sd, 0x73, edid[spa_loc + 1]); } else { - rep_write(sd, 0x74, val[spa_loc]); - rep_write(sd, 0x75, val[spa_loc + 1]); + rep_write(sd, 0x74, edid[spa_loc]); + rep_write(sd, 0x75, edid[spa_loc + 1]); } rep_write(sd, 0x76, spa_loc & 0xff); rep_write_and_or(sd, 0x77, 0xbf, (spa_loc >> 2) & 0x40); @@ -853,6 +850,7 @@ static int edid_write_hdmi_segment(struct v4l2_subdev *sd, u8 port) (port == ADV7842_EDID_PORT_A) ? 'A' : 'B'); return -EIO; } + cec_s_phys_addr(state->cec_adap, pa, false); /* enable hotplug after 200 ms */ queue_delayed_work(state->work_queues, @@ -983,20 +981,11 @@ static int adv7842_s_register(struct v4l2_subdev *sd, static int adv7842_s_detect_tx_5v_ctrl(struct v4l2_subdev *sd) { struct adv7842_state *state = to_state(sd); - int prev = v4l2_ctrl_g_ctrl(state->detect_tx_5v_ctrl); - u8 reg_io_6f = io_read(sd, 0x6f); - int val = 0; - - if (reg_io_6f & 0x02) - val |= 1; /* port A */ - if (reg_io_6f & 0x01) - val |= 2; /* port B */ + u16 cable_det = adv7842_read_cable_det(sd); - v4l2_dbg(1, debug, sd, "%s: 0x%x -> 0x%x\n", __func__, prev, val); + v4l2_dbg(1, debug, sd, "%s: 0x%x\n", __func__, cable_det); - if (val != prev) - return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl, val); - return 0; + return v4l2_ctrl_s_ctrl(state->detect_tx_5v_ctrl, cable_det); } static int find_and_set_predefined_video_timings(struct v4l2_subdev *sd, @@ -2170,6 +2159,207 @@ static void adv7842_irq_enable(struct v4l2_subdev *sd, bool enable) } } +#if IS_ENABLED(CONFIG_VIDEO_ADV7842_CEC) +static void adv7842_cec_tx_raw_status(struct v4l2_subdev *sd, u8 tx_raw_status) +{ + struct adv7842_state *state = to_state(sd); + + if ((cec_read(sd, 0x11) & 0x01) == 0) { + v4l2_dbg(1, debug, sd, "%s: tx raw: tx disabled\n", __func__); + return; + } + + if (tx_raw_status & 0x02) { + v4l2_dbg(1, debug, sd, "%s: tx raw: arbitration lost\n", + __func__); + cec_transmit_done(state->cec_adap, CEC_TX_STATUS_ARB_LOST, + 1, 0, 0, 0); + return; + } + if (tx_raw_status & 0x04) { + u8 status; + u8 nack_cnt; + u8 low_drive_cnt; + + v4l2_dbg(1, debug, sd, "%s: tx raw: retry failed\n", __func__); + /* + * We set this status bit since this hardware performs + * retransmissions. + */ + status = CEC_TX_STATUS_MAX_RETRIES; + nack_cnt = cec_read(sd, 0x14) & 0xf; + if (nack_cnt) + status |= CEC_TX_STATUS_NACK; + low_drive_cnt = cec_read(sd, 0x14) >> 4; + if (low_drive_cnt) + status |= CEC_TX_STATUS_LOW_DRIVE; + cec_transmit_done(state->cec_adap, status, + 0, nack_cnt, low_drive_cnt, 0); + return; + } + if (tx_raw_status & 0x01) { + v4l2_dbg(1, debug, sd, "%s: tx raw: ready ok\n", __func__); + cec_transmit_done(state->cec_adap, CEC_TX_STATUS_OK, 0, 0, 0, 0); + return; + } +} + +static void adv7842_cec_isr(struct v4l2_subdev *sd, bool *handled) +{ + u8 cec_irq; + + /* cec controller */ + cec_irq = io_read(sd, 0x93) & 0x0f; + if (!cec_irq) + return; + + v4l2_dbg(1, debug, sd, "%s: cec: irq 0x%x\n", __func__, cec_irq); + adv7842_cec_tx_raw_status(sd, cec_irq); + if (cec_irq & 0x08) { + struct adv7842_state *state = to_state(sd); + struct cec_msg msg; + + msg.len = cec_read(sd, 0x25) & 0x1f; + if (msg.len > 16) + msg.len = 16; + + if (msg.len) { + u8 i; + + for (i = 0; i < msg.len; i++) + msg.msg[i] = cec_read(sd, i + 0x15); + cec_write(sd, 0x26, 0x01); /* re-enable rx */ + cec_received_msg(state->cec_adap, &msg); + } + } + + io_write(sd, 0x94, cec_irq); + + if (handled) + *handled = true; +} + +static int adv7842_cec_adap_enable(struct cec_adapter *adap, bool enable) +{ + struct adv7842_state *state = adap->priv; + struct v4l2_subdev *sd = &state->sd; + + if (!state->cec_enabled_adap && enable) { + cec_write_clr_set(sd, 0x2a, 0x01, 0x01); /* power up cec */ + cec_write(sd, 0x2c, 0x01); /* cec soft reset */ + cec_write_clr_set(sd, 0x11, 0x01, 0); /* initially disable tx */ + /* enabled irqs: */ + /* tx: ready */ + /* tx: arbitration lost */ + /* tx: retry timeout */ + /* rx: ready */ + io_write_clr_set(sd, 0x96, 0x0f, 0x0f); + cec_write(sd, 0x26, 0x01); /* enable rx */ + } else if (state->cec_enabled_adap && !enable) { + /* disable cec interrupts */ + io_write_clr_set(sd, 0x96, 0x0f, 0x00); + /* disable address mask 1-3 */ + cec_write_clr_set(sd, 0x27, 0x70, 0x00); + /* power down cec section */ + cec_write_clr_set(sd, 0x2a, 0x01, 0x00); + state->cec_valid_addrs = 0; + } + state->cec_enabled_adap = enable; + return 0; +} + +static int adv7842_cec_adap_log_addr(struct cec_adapter *adap, u8 addr) +{ + struct adv7842_state *state = adap->priv; + struct v4l2_subdev *sd = &state->sd; + unsigned int i, free_idx = ADV7842_MAX_ADDRS; + + if (!state->cec_enabled_adap) + return addr == CEC_LOG_ADDR_INVALID ? 0 : -EIO; + + if (addr == CEC_LOG_ADDR_INVALID) { + cec_write_clr_set(sd, 0x27, 0x70, 0); + state->cec_valid_addrs = 0; + return 0; + } + + for (i = 0; i < ADV7842_MAX_ADDRS; i++) { + bool is_valid = state->cec_valid_addrs & (1 << i); + + if (free_idx == ADV7842_MAX_ADDRS && !is_valid) + free_idx = i; + if (is_valid && state->cec_addr[i] == addr) + return 0; + } + if (i == ADV7842_MAX_ADDRS) { + i = free_idx; + if (i == ADV7842_MAX_ADDRS) + return -ENXIO; + } + state->cec_addr[i] = addr; + state->cec_valid_addrs |= 1 << i; + + switch (i) { + case 0: + /* enable address mask 0 */ + cec_write_clr_set(sd, 0x27, 0x10, 0x10); + /* set address for mask 0 */ + cec_write_clr_set(sd, 0x28, 0x0f, addr); + break; + case 1: + /* enable address mask 1 */ + cec_write_clr_set(sd, 0x27, 0x20, 0x20); + /* set address for mask 1 */ + cec_write_clr_set(sd, 0x28, 0xf0, addr << 4); + break; + case 2: + /* enable address mask 2 */ + cec_write_clr_set(sd, 0x27, 0x40, 0x40); + /* set address for mask 1 */ + cec_write_clr_set(sd, 0x29, 0x0f, addr); + break; + } + return 0; +} + +static int adv7842_cec_adap_transmit(struct cec_adapter *adap, u8 attempts, + u32 signal_free_time, struct cec_msg *msg) +{ + struct adv7842_state *state = adap->priv; + struct v4l2_subdev *sd = &state->sd; + u8 len = msg->len; + unsigned int i; + + /* + * The number of retries is the number of attempts - 1, but retry + * at least once. It's not clear if a value of 0 is allowed, so + * let's do at least one retry. + */ + cec_write_clr_set(sd, 0x12, 0x70, max(1, attempts - 1) << 4); + + if (len > 16) { + v4l2_err(sd, "%s: len exceeded 16 (%d)\n", __func__, len); + return -EINVAL; + } + + /* write data */ + for (i = 0; i < len; i++) + cec_write(sd, i, msg->msg[i]); + + /* set length (data + header) */ + cec_write(sd, 0x10, len); + /* start transmit, enable tx */ + cec_write(sd, 0x11, 0x01); + return 0; +} + +static const struct cec_adap_ops adv7842_cec_adap_ops = { + .adap_enable = adv7842_cec_adap_enable, + .adap_log_addr = adv7842_cec_adap_log_addr, + .adap_transmit = adv7842_cec_adap_transmit, +}; +#endif + static int adv7842_isr(struct v4l2_subdev *sd, u32 status, bool *handled) { struct adv7842_state *state = to_state(sd); @@ -2241,6 +2431,11 @@ static int adv7842_isr(struct v4l2_subdev *sd, u32 status, bool *handled) *handled = true; } +#if IS_ENABLED(CONFIG_VIDEO_ADV7842_CEC) + /* cec */ + adv7842_cec_isr(sd, handled); +#endif + /* tx 5v detect */ if (irq_status[2] & 0x3) { v4l2_dbg(1, debug, sd, "%s: irq tx_5v\n", __func__); @@ -2321,10 +2516,12 @@ static int adv7842_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *e) case ADV7842_EDID_PORT_A: case ADV7842_EDID_PORT_B: memset(&state->hdmi_edid.edid, 0, 256); - if (e->blocks) + if (e->blocks) { state->hdmi_edid.present |= 0x04 << e->pad; - else + } else { state->hdmi_edid.present &= ~(0x04 << e->pad); + adv7842_s_detect_tx_5v_ctrl(sd); + } memcpy(&state->hdmi_edid.edid, e->edid, 128 * e->blocks); err = edid_write_hdmi_segment(sd, e->pad); break; @@ -2509,8 +2706,19 @@ static int adv7842_cp_log_status(struct v4l2_subdev *sd) v4l2_info(sd, "HPD A %s, B %s\n", reg_io_0x21 & 0x02 ? "enabled" : "disabled", reg_io_0x21 & 0x01 ? "enabled" : "disabled"); - v4l2_info(sd, "CEC %s\n", !!(cec_read(sd, 0x2a) & 0x01) ? + v4l2_info(sd, "CEC: %s\n", state->cec_enabled_adap ? "enabled" : "disabled"); + if (state->cec_enabled_adap) { + int i; + + for (i = 0; i < ADV7842_MAX_ADDRS; i++) { + bool is_valid = state->cec_valid_addrs & (1 << i); + + if (is_valid) + v4l2_info(sd, "CEC Logical Address: 0x%x\n", + state->cec_addr[i]); + } + } v4l2_info(sd, "-----Signal status-----\n"); if (state->hdmi_port_a) { @@ -3031,6 +3239,24 @@ static int adv7842_subscribe_event(struct v4l2_subdev *sd, } } +static int adv7842_registered(struct v4l2_subdev *sd) +{ + struct adv7842_state *state = to_state(sd); + int err; + + err = cec_register_adapter(state->cec_adap); + if (err) + cec_delete_adapter(state->cec_adap); + return err; +} + +static void adv7842_unregistered(struct v4l2_subdev *sd) +{ + struct adv7842_state *state = to_state(sd); + + cec_unregister_adapter(state->cec_adap); +} + /* ----------------------------------------------------------------------- */ static const struct v4l2_ctrl_ops adv7842_ctrl_ops = { @@ -3077,6 +3303,11 @@ static const struct v4l2_subdev_ops adv7842_ops = { .pad = &adv7842_pad_ops, }; +static const struct v4l2_subdev_internal_ops adv7842_int_ops = { + .registered = adv7842_registered, + .unregistered = adv7842_unregistered, +}; + /* -------------------------- custom ctrls ---------------------------------- */ static const struct v4l2_ctrl_config adv7842_ctrl_analog_sampling_phase = { @@ -3241,6 +3472,7 @@ static int adv7842_probe(struct i2c_client *client, sd = &state->sd; v4l2_i2c_subdev_init(sd, client, &adv7842_ops); sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS; + sd->internal_ops = &adv7842_int_ops; state->mode = pdata->mode; state->hdmi_port_a = pdata->input == ADV7842_SELECT_HDMI_PORT_A; @@ -3331,6 +3563,17 @@ static int adv7842_probe(struct i2c_client *client, if (err) goto err_entity; +#if IS_ENABLED(CONFIG_VIDEO_ADV7842_CEC) + state->cec_adap = cec_allocate_adapter(&adv7842_cec_adap_ops, + state, dev_name(&client->dev), + CEC_CAP_TRANSMIT | CEC_CAP_LOG_ADDRS | + CEC_CAP_PASSTHROUGH | CEC_CAP_RC, ADV7842_MAX_ADDRS, + &client->dev); + err = PTR_ERR_OR_ZERO(state->cec_adap); + if (err) + goto err_entity; +#endif + v4l2_info(sd, "%s found @ 0x%x (%s)\n", client->name, client->addr << 1, client->adapter->name); return 0; @@ -3355,7 +3598,6 @@ static int adv7842_remove(struct i2c_client *client) struct adv7842_state *state = to_state(sd); adv7842_irq_enable(sd, false); - cancel_delayed_work(&state->delayed_work_enable_hotplug); destroy_workqueue(state->work_queues); v4l2_device_unregister_subdev(sd); -- cgit v1.1 From 257d4eaed38c736da1654048e14ecd2b76bebf03 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Mon, 29 Jun 2015 04:55:35 -0300 Subject: [media] cec: adv7511: add cec support Add CEC support to the adv7511 driver. Signed-off-by: Hans Verkuil [k.debski@samsung.com: Merged changes from CEC Updates commit by Hans Verkuil] Signed-off-by: Kamil Debski Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/Kconfig | 8 + drivers/media/i2c/adv7511.c | 401 +++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 401 insertions(+), 8 deletions(-) (limited to 'drivers/media/i2c') diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 0179d10..ce9006e 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -463,6 +463,7 @@ config VIDEO_ADV7511 tristate "Analog Devices ADV7511 encoder" depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API select HDMI + select MEDIA_CEC_EDID ---help--- Support for the Analog Devices ADV7511 video encoder. @@ -471,6 +472,13 @@ config VIDEO_ADV7511 To compile this driver as a module, choose M here: the module will be called adv7511. +config VIDEO_ADV7511_CEC + bool "Enable Analog Devices ADV7511 CEC support" + depends on VIDEO_ADV7511 && MEDIA_CEC + ---help--- + When selected the adv7511 will support the optional + HDMI CEC feature. + config VIDEO_AD9389B tristate "Analog Devices AD9389B encoder" depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API diff --git a/drivers/media/i2c/adv7511.c b/drivers/media/i2c/adv7511.c index 39271c3..39d409f 100644 --- a/drivers/media/i2c/adv7511.c +++ b/drivers/media/i2c/adv7511.c @@ -33,6 +33,7 @@ #include #include #include +#include static int debug; module_param(debug, int, 0644); @@ -59,6 +60,8 @@ MODULE_LICENSE("GPL v2"); #define ADV7511_MIN_PIXELCLOCK 20000000 #define ADV7511_MAX_PIXELCLOCK 225000000 +#define ADV7511_MAX_ADDRS (3) + /* ********************************************************************** * @@ -90,12 +93,20 @@ struct adv7511_state { struct v4l2_ctrl_handler hdl; int chip_revision; u8 i2c_edid_addr; - u8 i2c_cec_addr; u8 i2c_pktmem_addr; + u8 i2c_cec_addr; + + struct i2c_client *i2c_cec; + struct cec_adapter *cec_adap; + u8 cec_addr[ADV7511_MAX_ADDRS]; + u8 cec_valid_addrs; + bool cec_enabled_adap; + /* Is the adv7511 powered on? */ bool power_on; /* Did we receive hotplug and rx-sense signals? */ bool have_monitor; + bool enabled_irq; /* timings from s_dv_timings */ struct v4l2_dv_timings dv_timings; u32 fmt_code; @@ -227,7 +238,7 @@ static int adv_smbus_read_i2c_block_data(struct i2c_client *client, return ret; } -static inline void adv7511_edid_rd(struct v4l2_subdev *sd, u16 len, u8 *buf) +static void adv7511_edid_rd(struct v4l2_subdev *sd, uint16_t len, uint8_t *buf) { struct adv7511_state *state = get_adv7511_state(sd); int i; @@ -242,6 +253,34 @@ static inline void adv7511_edid_rd(struct v4l2_subdev *sd, u16 len, u8 *buf) v4l2_err(sd, "%s: i2c read error\n", __func__); } +static inline int adv7511_cec_read(struct v4l2_subdev *sd, u8 reg) +{ + struct adv7511_state *state = get_adv7511_state(sd); + + return i2c_smbus_read_byte_data(state->i2c_cec, reg); +} + +static int adv7511_cec_write(struct v4l2_subdev *sd, u8 reg, u8 val) +{ + struct adv7511_state *state = get_adv7511_state(sd); + int ret; + int i; + + for (i = 0; i < 3; i++) { + ret = i2c_smbus_write_byte_data(state->i2c_cec, reg, val); + if (ret == 0) + return 0; + } + v4l2_err(sd, "%s: I2C Write Problem\n", __func__); + return ret; +} + +static inline int adv7511_cec_write_and_or(struct v4l2_subdev *sd, u8 reg, u8 mask, + u8 val) +{ + return adv7511_cec_write(sd, reg, (adv7511_cec_read(sd, reg) & mask) | val); +} + static int adv7511_pktmem_rd(struct v4l2_subdev *sd, u8 reg) { struct adv7511_state *state = get_adv7511_state(sd); @@ -425,16 +464,28 @@ static const struct v4l2_ctrl_ops adv7511_ctrl_ops = { #ifdef CONFIG_VIDEO_ADV_DEBUG static void adv7511_inv_register(struct v4l2_subdev *sd) { + struct adv7511_state *state = get_adv7511_state(sd); + v4l2_info(sd, "0x000-0x0ff: Main Map\n"); + if (state->i2c_cec) + v4l2_info(sd, "0x100-0x1ff: CEC Map\n"); } static int adv7511_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) { + struct adv7511_state *state = get_adv7511_state(sd); + reg->size = 1; switch (reg->reg >> 8) { case 0: reg->val = adv7511_rd(sd, reg->reg & 0xff); break; + case 1: + if (state->i2c_cec) { + reg->val = adv7511_cec_read(sd, reg->reg & 0xff); + break; + } + /* fall through */ default: v4l2_info(sd, "Register %03llx not supported\n", reg->reg); adv7511_inv_register(sd); @@ -445,10 +496,18 @@ static int adv7511_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register * static int adv7511_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) { + struct adv7511_state *state = get_adv7511_state(sd); + switch (reg->reg >> 8) { case 0: adv7511_wr(sd, reg->reg & 0xff, reg->val & 0xff); break; + case 1: + if (state->i2c_cec) { + adv7511_cec_write(sd, reg->reg & 0xff, reg->val & 0xff); + break; + } + /* fall through */ default: v4l2_info(sd, "Register %03llx not supported\n", reg->reg); adv7511_inv_register(sd); @@ -536,6 +595,7 @@ static int adv7511_log_status(struct v4l2_subdev *sd) { struct adv7511_state *state = get_adv7511_state(sd); struct adv7511_state_edid *edid = &state->edid; + int i; static const char * const states[] = { "in reset", @@ -605,7 +665,23 @@ static int adv7511_log_status(struct v4l2_subdev *sd) else v4l2_info(sd, "no timings set\n"); v4l2_info(sd, "i2c edid addr: 0x%x\n", state->i2c_edid_addr); + + if (state->i2c_cec == NULL) + return 0; + v4l2_info(sd, "i2c cec addr: 0x%x\n", state->i2c_cec_addr); + + v4l2_info(sd, "CEC: %s\n", state->cec_enabled_adap ? + "enabled" : "disabled"); + if (state->cec_enabled_adap) { + for (i = 0; i < ADV7511_MAX_ADDRS; i++) { + bool is_valid = state->cec_valid_addrs & (1 << i); + + if (is_valid) + v4l2_info(sd, "CEC Logical Address: 0x%x\n", + state->cec_addr[i]); + } + } v4l2_info(sd, "i2c pktmem addr: 0x%x\n", state->i2c_pktmem_addr); return 0; } @@ -663,15 +739,197 @@ static int adv7511_s_power(struct v4l2_subdev *sd, int on) return true; } +#if IS_ENABLED(CONFIG_VIDEO_ADV7511_CEC) +static int adv7511_cec_adap_enable(struct cec_adapter *adap, bool enable) +{ + struct adv7511_state *state = adap->priv; + struct v4l2_subdev *sd = &state->sd; + + if (state->i2c_cec == NULL) + return -EIO; + + if (!state->cec_enabled_adap && enable) { + /* power up cec section */ + adv7511_cec_write_and_or(sd, 0x4e, 0xfc, 0x01); + /* legacy mode and clear all rx buffers */ + adv7511_cec_write(sd, 0x4a, 0x07); + adv7511_cec_write(sd, 0x4a, 0); + adv7511_cec_write_and_or(sd, 0x11, 0xfe, 0); /* initially disable tx */ + /* enabled irqs: */ + /* tx: ready */ + /* tx: arbitration lost */ + /* tx: retry timeout */ + /* rx: ready 1 */ + if (state->enabled_irq) + adv7511_wr_and_or(sd, 0x95, 0xc0, 0x39); + } else if (state->cec_enabled_adap && !enable) { + if (state->enabled_irq) + adv7511_wr_and_or(sd, 0x95, 0xc0, 0x00); + /* disable address mask 1-3 */ + adv7511_cec_write_and_or(sd, 0x4b, 0x8f, 0x00); + /* power down cec section */ + adv7511_cec_write_and_or(sd, 0x4e, 0xfc, 0x00); + state->cec_valid_addrs = 0; + } + state->cec_enabled_adap = enable; + return 0; +} + +static int adv7511_cec_adap_log_addr(struct cec_adapter *adap, u8 addr) +{ + struct adv7511_state *state = adap->priv; + struct v4l2_subdev *sd = &state->sd; + unsigned int i, free_idx = ADV7511_MAX_ADDRS; + + if (!state->cec_enabled_adap) + return addr == CEC_LOG_ADDR_INVALID ? 0 : -EIO; + + if (addr == CEC_LOG_ADDR_INVALID) { + adv7511_cec_write_and_or(sd, 0x4b, 0x8f, 0); + state->cec_valid_addrs = 0; + return 0; + } + + for (i = 0; i < ADV7511_MAX_ADDRS; i++) { + bool is_valid = state->cec_valid_addrs & (1 << i); + + if (free_idx == ADV7511_MAX_ADDRS && !is_valid) + free_idx = i; + if (is_valid && state->cec_addr[i] == addr) + return 0; + } + if (i == ADV7511_MAX_ADDRS) { + i = free_idx; + if (i == ADV7511_MAX_ADDRS) + return -ENXIO; + } + state->cec_addr[i] = addr; + state->cec_valid_addrs |= 1 << i; + + switch (i) { + case 0: + /* enable address mask 0 */ + adv7511_cec_write_and_or(sd, 0x4b, 0xef, 0x10); + /* set address for mask 0 */ + adv7511_cec_write_and_or(sd, 0x4c, 0xf0, addr); + break; + case 1: + /* enable address mask 1 */ + adv7511_cec_write_and_or(sd, 0x4b, 0xdf, 0x20); + /* set address for mask 1 */ + adv7511_cec_write_and_or(sd, 0x4c, 0x0f, addr << 4); + break; + case 2: + /* enable address mask 2 */ + adv7511_cec_write_and_or(sd, 0x4b, 0xbf, 0x40); + /* set address for mask 1 */ + adv7511_cec_write_and_or(sd, 0x4d, 0xf0, addr); + break; + } + return 0; +} + +static int adv7511_cec_adap_transmit(struct cec_adapter *adap, u8 attempts, + u32 signal_free_time, struct cec_msg *msg) +{ + struct adv7511_state *state = adap->priv; + struct v4l2_subdev *sd = &state->sd; + u8 len = msg->len; + unsigned int i; + + v4l2_dbg(1, debug, sd, "%s: len %d\n", __func__, len); + + if (len > 16) { + v4l2_err(sd, "%s: len exceeded 16 (%d)\n", __func__, len); + return -EINVAL; + } + + /* + * The number of retries is the number of attempts - 1, but retry + * at least once. It's not clear if a value of 0 is allowed, so + * let's do at least one retry. + */ + adv7511_cec_write_and_or(sd, 0x12, ~0x70, max(1, attempts - 1) << 4); + + /* blocking, clear cec tx irq status */ + adv7511_wr_and_or(sd, 0x97, 0xc7, 0x38); + + /* write data */ + for (i = 0; i < len; i++) + adv7511_cec_write(sd, i, msg->msg[i]); + + /* set length (data + header) */ + adv7511_cec_write(sd, 0x10, len); + /* start transmit, enable tx */ + adv7511_cec_write(sd, 0x11, 0x01); + return 0; +} + +static void adv_cec_tx_raw_status(struct v4l2_subdev *sd, u8 tx_raw_status) +{ + struct adv7511_state *state = get_adv7511_state(sd); + + if ((adv7511_cec_read(sd, 0x11) & 0x01) == 0) { + v4l2_dbg(1, debug, sd, "%s: tx raw: tx disabled\n", __func__); + return; + } + + if (tx_raw_status & 0x10) { + v4l2_dbg(1, debug, sd, + "%s: tx raw: arbitration lost\n", __func__); + cec_transmit_done(state->cec_adap, CEC_TX_STATUS_ARB_LOST, + 1, 0, 0, 0); + return; + } + if (tx_raw_status & 0x08) { + u8 status; + u8 nack_cnt; + u8 low_drive_cnt; + + v4l2_dbg(1, debug, sd, "%s: tx raw: retry failed\n", __func__); + /* + * We set this status bit since this hardware performs + * retransmissions. + */ + status = CEC_TX_STATUS_MAX_RETRIES; + nack_cnt = adv7511_cec_read(sd, 0x14) & 0xf; + if (nack_cnt) + status |= CEC_TX_STATUS_NACK; + low_drive_cnt = adv7511_cec_read(sd, 0x14) >> 4; + if (low_drive_cnt) + status |= CEC_TX_STATUS_LOW_DRIVE; + cec_transmit_done(state->cec_adap, status, + 0, nack_cnt, low_drive_cnt, 0); + return; + } + if (tx_raw_status & 0x20) { + v4l2_dbg(1, debug, sd, "%s: tx raw: ready ok\n", __func__); + cec_transmit_done(state->cec_adap, CEC_TX_STATUS_OK, 0, 0, 0, 0); + return; + } +} + +static const struct cec_adap_ops adv7511_cec_adap_ops = { + .adap_enable = adv7511_cec_adap_enable, + .adap_log_addr = adv7511_cec_adap_log_addr, + .adap_transmit = adv7511_cec_adap_transmit, +}; +#endif + /* Enable interrupts */ static void adv7511_set_isr(struct v4l2_subdev *sd, bool enable) { + struct adv7511_state *state = get_adv7511_state(sd); u8 irqs = MASK_ADV7511_HPD_INT | MASK_ADV7511_MSEN_INT; u8 irqs_rd; int retries = 100; v4l2_dbg(2, debug, sd, "%s: %s\n", __func__, enable ? "enable" : "disable"); + if (state->enabled_irq == enable) + return; + state->enabled_irq = enable; + /* The datasheet says that the EDID ready interrupt should be disabled if there is no hotplug. */ if (!enable) @@ -679,6 +937,9 @@ static void adv7511_set_isr(struct v4l2_subdev *sd, bool enable) else if (adv7511_have_hotplug(sd)) irqs |= MASK_ADV7511_EDID_RDY_INT; + adv7511_wr_and_or(sd, 0x95, 0xc0, + (state->cec_enabled_adap && enable) ? 0x39 : 0x00); + /* * This i2c write can fail (approx. 1 in 1000 writes). But it * is essential that this register is correct, so retry it @@ -701,20 +962,53 @@ static void adv7511_set_isr(struct v4l2_subdev *sd, bool enable) static int adv7511_isr(struct v4l2_subdev *sd, u32 status, bool *handled) { u8 irq_status; + u8 cec_irq; /* disable interrupts to prevent a race condition */ adv7511_set_isr(sd, false); irq_status = adv7511_rd(sd, 0x96); + cec_irq = adv7511_rd(sd, 0x97); /* clear detected interrupts */ adv7511_wr(sd, 0x96, irq_status); + adv7511_wr(sd, 0x97, cec_irq); - v4l2_dbg(1, debug, sd, "%s: irq 0x%x\n", __func__, irq_status); + v4l2_dbg(1, debug, sd, "%s: irq 0x%x, cec-irq 0x%x\n", __func__, + irq_status, cec_irq); if (irq_status & (MASK_ADV7511_HPD_INT | MASK_ADV7511_MSEN_INT)) adv7511_check_monitor_present_status(sd); if (irq_status & MASK_ADV7511_EDID_RDY_INT) adv7511_check_edid_status(sd); +#if IS_ENABLED(CONFIG_VIDEO_ADV7511_CEC) + if (cec_irq & 0x38) + adv_cec_tx_raw_status(sd, cec_irq); + + if (cec_irq & 1) { + struct adv7511_state *state = get_adv7511_state(sd); + struct cec_msg msg; + + msg.len = adv7511_cec_read(sd, 0x25) & 0x1f; + + v4l2_dbg(1, debug, sd, "%s: cec msg len %d\n", __func__, + msg.len); + + if (msg.len > 16) + msg.len = 16; + + if (msg.len) { + u8 i; + + for (i = 0; i < msg.len; i++) + msg.msg[i] = adv7511_cec_read(sd, i + 0x15); + + adv7511_cec_write(sd, 0x4a, 1); /* toggle to re-enable rx 1 */ + adv7511_cec_write(sd, 0x4a, 0); + cec_received_msg(state->cec_adap, &msg); + } + } +#endif + /* enable interrupts */ adv7511_set_isr(sd, true); @@ -1183,6 +1477,8 @@ static void adv7511_notify_no_edid(struct v4l2_subdev *sd) /* We failed to read the EDID, so send an event for this. */ ed.present = false; ed.segment = adv7511_rd(sd, 0xc4); + ed.phys_addr = CEC_PHYS_ADDR_INVALID; + cec_s_phys_addr(state->cec_adap, ed.phys_addr, false); v4l2_subdev_notify(sd, ADV7511_EDID_DETECT, (void *)&ed); v4l2_ctrl_s_ctrl(state->have_edid0_ctrl, 0x0); } @@ -1406,13 +1702,16 @@ static bool adv7511_check_edid_status(struct v4l2_subdev *sd) v4l2_dbg(1, debug, sd, "%s: edid complete with %d segment(s)\n", __func__, state->edid.segments); state->edid.complete = true; - + ed.phys_addr = cec_get_edid_phys_addr(state->edid.data, + state->edid.segments * 256, + NULL); /* report when we have all segments but report only for segment 0 */ ed.present = true; ed.segment = 0; state->edid_detect_counter++; + cec_s_phys_addr(state->cec_adap, ed.phys_addr, false); v4l2_subdev_notify(sd, ADV7511_EDID_DETECT, (void *)&ed); return ed.present; } @@ -1420,17 +1719,43 @@ static bool adv7511_check_edid_status(struct v4l2_subdev *sd) return false; } +static int adv7511_registered(struct v4l2_subdev *sd) +{ + struct adv7511_state *state = get_adv7511_state(sd); + int err; + + err = cec_register_adapter(state->cec_adap); + if (err) + cec_delete_adapter(state->cec_adap); + return err; +} + +static void adv7511_unregistered(struct v4l2_subdev *sd) +{ + struct adv7511_state *state = get_adv7511_state(sd); + + cec_unregister_adapter(state->cec_adap); +} + +static const struct v4l2_subdev_internal_ops adv7511_int_ops = { + .registered = adv7511_registered, + .unregistered = adv7511_unregistered, +}; + /* ----------------------------------------------------------------------- */ /* Setup ADV7511 */ static void adv7511_init_setup(struct v4l2_subdev *sd) { struct adv7511_state *state = get_adv7511_state(sd); struct adv7511_state_edid *edid = &state->edid; + u32 cec_clk = state->pdata.cec_clk; + u8 ratio; v4l2_dbg(1, debug, sd, "%s\n", __func__); /* clear all interrupts */ adv7511_wr(sd, 0x96, 0xff); + adv7511_wr(sd, 0x97, 0xff); /* * Stop HPD from resetting a lot of registers. * It might leave the chip in a partly un-initialized state, @@ -1442,6 +1767,25 @@ static void adv7511_init_setup(struct v4l2_subdev *sd) adv7511_set_isr(sd, false); adv7511_s_stream(sd, false); adv7511_s_audio_stream(sd, false); + + if (state->i2c_cec == NULL) + return; + + v4l2_dbg(1, debug, sd, "%s: cec_clk %d\n", __func__, cec_clk); + + /* cec soft reset */ + adv7511_cec_write(sd, 0x50, 0x01); + adv7511_cec_write(sd, 0x50, 0x00); + + /* legacy mode */ + adv7511_cec_write(sd, 0x4a, 0x00); + + if (cec_clk % 750000 != 0) + v4l2_err(sd, "%s: cec_clk %d, not multiple of 750 Khz\n", + __func__, cec_clk); + + ratio = (cec_clk / 750000) - 1; + adv7511_cec_write(sd, 0x4e, ratio << 2); } static int adv7511_probe(struct i2c_client *client, const struct i2c_device_id *id) @@ -1476,6 +1820,7 @@ static int adv7511_probe(struct i2c_client *client, const struct i2c_device_id * client->addr << 1); v4l2_i2c_subdev_init(sd, client, &adv7511_ops); + sd->internal_ops = &adv7511_int_ops; hdl = &state->hdl; v4l2_ctrl_handler_init(hdl, 10); @@ -1516,26 +1861,47 @@ static int adv7511_probe(struct i2c_client *client, const struct i2c_device_id * chip_id[0] = adv7511_rd(sd, 0xf5); chip_id[1] = adv7511_rd(sd, 0xf6); if (chip_id[0] != 0x75 || chip_id[1] != 0x11) { - v4l2_err(sd, "chip_id != 0x7511, read 0x%02x%02x\n", chip_id[0], chip_id[1]); + v4l2_err(sd, "chip_id != 0x7511, read 0x%02x%02x\n", chip_id[0], + chip_id[1]); err = -EIO; goto err_entity; } - state->i2c_edid = i2c_new_dummy(client->adapter, state->i2c_edid_addr >> 1); + state->i2c_edid = i2c_new_dummy(client->adapter, + state->i2c_edid_addr >> 1); if (state->i2c_edid == NULL) { v4l2_err(sd, "failed to register edid i2c client\n"); err = -ENOMEM; goto err_entity; } + adv7511_wr(sd, 0xe1, state->i2c_cec_addr); + if (state->pdata.cec_clk < 3000000 || + state->pdata.cec_clk > 100000000) { + v4l2_err(sd, "%s: cec_clk %u outside range, disabling cec\n", + __func__, state->pdata.cec_clk); + state->pdata.cec_clk = 0; + } + + if (state->pdata.cec_clk) { + state->i2c_cec = i2c_new_dummy(client->adapter, + state->i2c_cec_addr >> 1); + if (state->i2c_cec == NULL) { + v4l2_err(sd, "failed to register cec i2c client\n"); + goto err_unreg_edid; + } + adv7511_wr(sd, 0xe2, 0x00); /* power up cec section */ + } else { + adv7511_wr(sd, 0xe2, 0x01); /* power down cec section */ + } + state->i2c_pktmem = i2c_new_dummy(client->adapter, state->i2c_pktmem_addr >> 1); if (state->i2c_pktmem == NULL) { v4l2_err(sd, "failed to register pktmem i2c client\n"); err = -ENOMEM; - goto err_unreg_edid; + goto err_unreg_cec; } - adv7511_wr(sd, 0xe2, 0x01); /* power down cec section */ state->work_queue = create_singlethread_workqueue(sd->name); if (state->work_queue == NULL) { v4l2_err(sd, "could not create workqueue\n"); @@ -1546,6 +1912,19 @@ static int adv7511_probe(struct i2c_client *client, const struct i2c_device_id * INIT_DELAYED_WORK(&state->edid_handler, adv7511_edid_handler); adv7511_init_setup(sd); + +#if IS_ENABLED(CONFIG_VIDEO_ADV7511_CEC) + state->cec_adap = cec_allocate_adapter(&adv7511_cec_adap_ops, + state, dev_name(&client->dev), CEC_CAP_TRANSMIT | + CEC_CAP_LOG_ADDRS | CEC_CAP_PASSTHROUGH | CEC_CAP_RC, + ADV7511_MAX_ADDRS, &client->dev); + err = PTR_ERR_OR_ZERO(state->cec_adap); + if (err) { + destroy_workqueue(state->work_queue); + goto err_unreg_pktmem; + } +#endif + adv7511_set_isr(sd, true); adv7511_check_monitor_present_status(sd); @@ -1555,6 +1934,9 @@ static int adv7511_probe(struct i2c_client *client, const struct i2c_device_id * err_unreg_pktmem: i2c_unregister_device(state->i2c_pktmem); +err_unreg_cec: + if (state->i2c_cec) + i2c_unregister_device(state->i2c_cec); err_unreg_edid: i2c_unregister_device(state->i2c_edid); err_entity: @@ -1576,9 +1958,12 @@ static int adv7511_remove(struct i2c_client *client) v4l2_dbg(1, debug, sd, "%s removed @ 0x%x (%s)\n", client->name, client->addr << 1, client->adapter->name); + adv7511_set_isr(sd, false); adv7511_init_setup(sd); cancel_delayed_work(&state->edid_handler); i2c_unregister_device(state->i2c_edid); + if (state->i2c_cec) + i2c_unregister_device(state->i2c_cec); i2c_unregister_device(state->i2c_pktmem); destroy_workqueue(state->work_queue); v4l2_device_unregister_subdev(sd); -- cgit v1.1