#define ADV7511_PACKET_GM(x) ADV7511_PACKET(5, x)
#define ADV7511_PACKET_SPARE(x) ADV7511_PACKET(6, x)
+#define ADV7511_REG_CEC_TX_FRAME_HDR 0x00
+#define ADV7511_REG_CEC_TX_FRAME_DATA0 0x01
+#define ADV7511_REG_CEC_TX_FRAME_LEN 0x10
+#define ADV7511_REG_CEC_TX_ENABLE 0x11
+#define ADV7511_REG_CEC_TX_RETRY 0x12
+#define ADV7511_REG_CEC_TX_LOW_DRV_CNT 0x14
+#define ADV7511_REG_CEC_RX_FRAME_HDR 0x15
+#define ADV7511_REG_CEC_RX_FRAME_DATA0 0x16
+#define ADV7511_REG_CEC_RX_FRAME_LEN 0x25
+#define ADV7511_REG_CEC_RX_ENABLE 0x26
+#define ADV7511_REG_CEC_RX_BUFFERS 0x4a
+#define ADV7511_REG_CEC_LOG_ADDR_MASK 0x4b
+#define ADV7511_REG_CEC_LOG_ADDR_0_1 0x4c
+#define ADV7511_REG_CEC_LOG_ADDR_2 0x4d
+#define ADV7511_REG_CEC_CLK_DIV 0x4e
+#define ADV7511_REG_CEC_SOFT_RESET 0x50
+
+#define ADV7533_REG_CEC_OFFSET 0x70
+
enum adv7511_input_clock {
ADV7511_INPUT_CLOCK_1X,
ADV7511_INPUT_CLOCK_2X,
ADV7533,
};
+#define ADV7511_MAX_ADDRS 3
+
struct adv7511 {
struct i2c_client *i2c_main;
struct i2c_client *i2c_edid;
enum adv7511_type type;
struct platform_device *audio_pdev;
+
+ struct cec_adapter *cec_adap;
+ u8 cec_addr[ADV7511_MAX_ADDRS];
+ u8 cec_valid_addrs;
+ bool cec_enabled_adap;
+ struct clk *cec_clk;
+ u32 cec_clk_freq;
};
+#ifdef CONFIG_DRM_I2C_ADV7511_CEC
+int adv7511_cec_init(struct device *dev, struct adv7511 *adv7511,
+ unsigned int offset);
+void adv7511_cec_irq_process(struct adv7511 *adv7511, unsigned int irq1);
+#endif
+
#ifdef CONFIG_DRM_I2C_ADV7533
void adv7533_dsi_power_on(struct adv7511 *adv);
void adv7533_dsi_power_off(struct adv7511 *adv);
void adv7533_mode_set(struct adv7511 *adv, struct drm_display_mode *mode);
int adv7533_patch_registers(struct adv7511 *adv);
-void adv7533_uninit_cec(struct adv7511 *adv);
-int adv7533_init_cec(struct adv7511 *adv);
+int adv7533_patch_cec_registers(struct adv7511 *adv);
int adv7533_attach_dsi(struct adv7511 *adv);
void adv7533_detach_dsi(struct adv7511 *adv);
int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv);
return -ENODEV;
}
-static inline void adv7533_uninit_cec(struct adv7511 *adv)
-{
-}
-
-static inline int adv7533_init_cec(struct adv7511 *adv)
+static inline int adv7533_patch_cec_registers(struct adv7511 *adv)
{
return -ENODEV;
}
--- /dev/null
+/*
+ * adv7511_cec.c - Analog Devices ADV7511/33 cec driver
+ *
+ * Copyright 2017 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+
+#include <media/cec.h>
+
+#include "adv7511.h"
+
+#define ADV7511_INT1_CEC_MASK \
+ (ADV7511_INT1_CEC_TX_READY | ADV7511_INT1_CEC_TX_ARBIT_LOST | \
+ ADV7511_INT1_CEC_TX_RETRY_TIMEOUT | ADV7511_INT1_CEC_RX_READY1)
+
+static void adv_cec_tx_raw_status(struct adv7511 *adv7511, u8 tx_raw_status)
+{
+ unsigned int offset = adv7511->type == ADV7533 ?
+ ADV7533_REG_CEC_OFFSET : 0;
+ unsigned int val;
+
+ if (regmap_read(adv7511->regmap_cec,
+ ADV7511_REG_CEC_TX_ENABLE + offset, &val))
+ return;
+
+ if ((val & 0x01) == 0)
+ return;
+
+ if (tx_raw_status & ADV7511_INT1_CEC_TX_ARBIT_LOST) {
+ cec_transmit_attempt_done(adv7511->cec_adap,
+ CEC_TX_STATUS_ARB_LOST);
+ return;
+ }
+ if (tx_raw_status & ADV7511_INT1_CEC_TX_RETRY_TIMEOUT) {
+ u8 status;
+ u8 err_cnt = 0;
+ u8 nack_cnt = 0;
+ u8 low_drive_cnt = 0;
+ unsigned int cnt;
+
+ /*
+ * We set this status bit since this hardware performs
+ * retransmissions.
+ */
+ status = CEC_TX_STATUS_MAX_RETRIES;
+ if (regmap_read(adv7511->regmap_cec,
+ ADV7511_REG_CEC_TX_LOW_DRV_CNT + offset, &cnt)) {
+ err_cnt = 1;
+ status |= CEC_TX_STATUS_ERROR;
+ } else {
+ nack_cnt = cnt & 0xf;
+ if (nack_cnt)
+ status |= CEC_TX_STATUS_NACK;
+ low_drive_cnt = cnt >> 4;
+ if (low_drive_cnt)
+ status |= CEC_TX_STATUS_LOW_DRIVE;
+ }
+ cec_transmit_done(adv7511->cec_adap, status,
+ 0, nack_cnt, low_drive_cnt, err_cnt);
+ return;
+ }
+ if (tx_raw_status & ADV7511_INT1_CEC_TX_READY) {
+ cec_transmit_attempt_done(adv7511->cec_adap, CEC_TX_STATUS_OK);
+ return;
+ }
+}
+
+void adv7511_cec_irq_process(struct adv7511 *adv7511, unsigned int irq1)
+{
+ unsigned int offset = adv7511->type == ADV7533 ?
+ ADV7533_REG_CEC_OFFSET : 0;
+ const u32 irq_tx_mask = ADV7511_INT1_CEC_TX_READY |
+ ADV7511_INT1_CEC_TX_ARBIT_LOST |
+ ADV7511_INT1_CEC_TX_RETRY_TIMEOUT;
+ struct cec_msg msg = {};
+ unsigned int len;
+ unsigned int val;
+ u8 i;
+
+ if (irq1 & irq_tx_mask)
+ adv_cec_tx_raw_status(adv7511, irq1);
+
+ if (!(irq1 & ADV7511_INT1_CEC_RX_READY1))
+ return;
+
+ if (regmap_read(adv7511->regmap_cec,
+ ADV7511_REG_CEC_RX_FRAME_LEN + offset, &len))
+ return;
+
+ msg.len = len & 0x1f;
+
+ if (msg.len > 16)
+ msg.len = 16;
+
+ if (!msg.len)
+ return;
+
+ for (i = 0; i < msg.len; i++) {
+ regmap_read(adv7511->regmap_cec,
+ i + ADV7511_REG_CEC_RX_FRAME_HDR + offset, &val);
+ msg.msg[i] = val;
+ }
+
+ /* toggle to re-enable rx 1 */
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_RX_BUFFERS + offset, 1);
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_RX_BUFFERS + offset, 0);
+ cec_received_msg(adv7511->cec_adap, &msg);
+}
+
+static int adv7511_cec_adap_enable(struct cec_adapter *adap, bool enable)
+{
+ struct adv7511 *adv7511 = cec_get_drvdata(adap);
+ unsigned int offset = adv7511->type == ADV7533 ?
+ ADV7533_REG_CEC_OFFSET : 0;
+
+ if (adv7511->i2c_cec == NULL)
+ return -EIO;
+
+ if (!adv7511->cec_enabled_adap && enable) {
+ /* power up cec section */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_CLK_DIV + offset,
+ 0x03, 0x01);
+ /* legacy mode and clear all rx buffers */
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_RX_BUFFERS + offset, 0x07);
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_RX_BUFFERS + offset, 0);
+ /* initially disable tx */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_TX_ENABLE + offset, 1, 0);
+ /* enabled irqs: */
+ /* tx: ready */
+ /* tx: arbitration lost */
+ /* tx: retry timeout */
+ /* rx: ready 1 */
+ regmap_update_bits(adv7511->regmap,
+ ADV7511_REG_INT_ENABLE(1), 0x3f,
+ ADV7511_INT1_CEC_MASK);
+ } else if (adv7511->cec_enabled_adap && !enable) {
+ regmap_update_bits(adv7511->regmap,
+ ADV7511_REG_INT_ENABLE(1), 0x3f, 0);
+ /* disable address mask 1-3 */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+ 0x70, 0x00);
+ /* power down cec section */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_CLK_DIV + offset,
+ 0x03, 0x00);
+ adv7511->cec_valid_addrs = 0;
+ }
+ adv7511->cec_enabled_adap = enable;
+ return 0;
+}
+
+static int adv7511_cec_adap_log_addr(struct cec_adapter *adap, u8 addr)
+{
+ struct adv7511 *adv7511 = cec_get_drvdata(adap);
+ unsigned int offset = adv7511->type == ADV7533 ?
+ ADV7533_REG_CEC_OFFSET : 0;
+ unsigned int i, free_idx = ADV7511_MAX_ADDRS;
+
+ if (!adv7511->cec_enabled_adap)
+ return addr == CEC_LOG_ADDR_INVALID ? 0 : -EIO;
+
+ if (addr == CEC_LOG_ADDR_INVALID) {
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+ 0x70, 0);
+ adv7511->cec_valid_addrs = 0;
+ return 0;
+ }
+
+ for (i = 0; i < ADV7511_MAX_ADDRS; i++) {
+ bool is_valid = adv7511->cec_valid_addrs & (1 << i);
+
+ if (free_idx == ADV7511_MAX_ADDRS && !is_valid)
+ free_idx = i;
+ if (is_valid && adv7511->cec_addr[i] == addr)
+ return 0;
+ }
+ if (i == ADV7511_MAX_ADDRS) {
+ i = free_idx;
+ if (i == ADV7511_MAX_ADDRS)
+ return -ENXIO;
+ }
+ adv7511->cec_addr[i] = addr;
+ adv7511->cec_valid_addrs |= 1 << i;
+
+ switch (i) {
+ case 0:
+ /* enable address mask 0 */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+ 0x10, 0x10);
+ /* set address for mask 0 */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_0_1 + offset,
+ 0x0f, addr);
+ break;
+ case 1:
+ /* enable address mask 1 */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+ 0x20, 0x20);
+ /* set address for mask 1 */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_0_1 + offset,
+ 0xf0, addr << 4);
+ break;
+ case 2:
+ /* enable address mask 2 */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_MASK + offset,
+ 0x40, 0x40);
+ /* set address for mask 1 */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_LOG_ADDR_2 + offset,
+ 0x0f, 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 *adv7511 = cec_get_drvdata(adap);
+ unsigned int offset = adv7511->type == ADV7533 ?
+ ADV7533_REG_CEC_OFFSET : 0;
+ 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.
+ */
+ regmap_update_bits(adv7511->regmap_cec,
+ ADV7511_REG_CEC_TX_RETRY + offset,
+ 0x70, max(1, attempts - 1) << 4);
+
+ /* blocking, clear cec tx irq status */
+ regmap_update_bits(adv7511->regmap, ADV7511_REG_INT(1), 0x38, 0x38);
+
+ /* write data */
+ for (i = 0; i < len; i++)
+ regmap_write(adv7511->regmap_cec,
+ i + ADV7511_REG_CEC_TX_FRAME_HDR + offset,
+ msg->msg[i]);
+
+ /* set length (data + header) */
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_TX_FRAME_LEN + offset, len);
+ /* start transmit, enable tx */
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_TX_ENABLE + offset, 0x01);
+ return 0;
+}
+
+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,
+};
+
+static int adv7511_cec_parse_dt(struct device *dev, struct adv7511 *adv7511)
+{
+ adv7511->cec_clk = devm_clk_get(dev, "cec");
+ if (IS_ERR(adv7511->cec_clk)) {
+ int ret = PTR_ERR(adv7511->cec_clk);
+
+ adv7511->cec_clk = NULL;
+ return ret;
+ }
+ clk_prepare_enable(adv7511->cec_clk);
+ adv7511->cec_clk_freq = clk_get_rate(adv7511->cec_clk);
+ return 0;
+}
+
+int adv7511_cec_init(struct device *dev, struct adv7511 *adv7511,
+ unsigned int offset)
+{
+ int ret = adv7511_cec_parse_dt(dev, adv7511);
+
+ if (ret)
+ return ret;
+
+ adv7511->cec_adap = cec_allocate_adapter(&adv7511_cec_adap_ops,
+ adv7511, dev_name(dev), CEC_CAP_DEFAULTS, ADV7511_MAX_ADDRS);
+ if (IS_ERR(adv7511->cec_adap))
+ return PTR_ERR(adv7511->cec_adap);
+
+ regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL + offset, 0);
+ /* cec soft reset */
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_SOFT_RESET + offset, 0x01);
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_SOFT_RESET + offset, 0x00);
+
+ /* legacy mode */
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_RX_BUFFERS + offset, 0x00);
+
+ regmap_write(adv7511->regmap_cec,
+ ADV7511_REG_CEC_CLK_DIV + offset,
+ ((adv7511->cec_clk_freq / 750000) - 1) << 2);
+
+ ret = cec_register_adapter(adv7511->cec_adap, dev);
+ if (ret) {
+ cec_delete_adapter(adv7511->cec_adap);
+ adv7511->cec_adap = NULL;
+ }
+ return ret;
+}
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/slab.h>
+#include <linux/clk.h>
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_edid.h>
+#include <media/cec.h>
+
#include "adv7511.h"
/* ADI recommended values for proper operation. */
*/
regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0),
ADV7511_INT0_EDID_READY | ADV7511_INT0_HPD);
- regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1),
- ADV7511_INT1_DDC_ERROR);
+ regmap_update_bits(adv7511->regmap,
+ ADV7511_REG_INT_ENABLE(1),
+ ADV7511_INT1_DDC_ERROR,
+ ADV7511_INT1_DDC_ERROR);
}
/*
regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
ADV7511_POWER_POWER_DOWN,
ADV7511_POWER_POWER_DOWN);
+ regmap_update_bits(adv7511->regmap,
+ ADV7511_REG_INT_ENABLE(1),
+ ADV7511_INT1_DDC_ERROR, 0);
regcache_mark_dirty(adv7511->regmap);
}
if (adv7511->connector.status != status) {
adv7511->connector.status = status;
+ if (status == connector_status_disconnected)
+ cec_phys_addr_invalidate(adv7511->cec_adap);
drm_kms_helper_hotplug_event(adv7511->connector.dev);
}
}
wake_up_all(&adv7511->wq);
}
+#ifdef CONFIG_DRM_I2C_ADV7511_CEC
+ adv7511_cec_irq_process(adv7511, irq1);
+#endif
+
return 0;
}
kfree(edid);
+ cec_s_phys_addr_from_edid(adv7511->cec_adap, edid);
+
return count;
}
regulator_bulk_disable(adv->num_supplies, adv->supplies);
}
+static bool adv7511_cec_register_volatile(struct device *dev, unsigned int reg)
+{
+ struct i2c_client *i2c = to_i2c_client(dev);
+ struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
+
+ if (adv7511->type == ADV7533)
+ reg -= ADV7533_REG_CEC_OFFSET;
+
+ switch (reg) {
+ case ADV7511_REG_CEC_RX_FRAME_HDR:
+ case ADV7511_REG_CEC_RX_FRAME_DATA0...
+ ADV7511_REG_CEC_RX_FRAME_DATA0 + 14:
+ case ADV7511_REG_CEC_RX_FRAME_LEN:
+ case ADV7511_REG_CEC_RX_BUFFERS:
+ case ADV7511_REG_CEC_TX_LOW_DRV_CNT:
+ return true;
+ }
+
+ return false;
+}
+
+static const struct regmap_config adv7511_cec_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = 0xff,
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_reg = adv7511_cec_register_volatile,
+};
+
+static int adv7511_init_cec_regmap(struct adv7511 *adv)
+{
+ int ret;
+
+ adv->i2c_cec = i2c_new_dummy(adv->i2c_main->adapter,
+ adv->i2c_main->addr - 1);
+ if (!adv->i2c_cec)
+ return -ENOMEM;
+ i2c_set_clientdata(adv->i2c_cec, adv);
+
+ adv->regmap_cec = devm_regmap_init_i2c(adv->i2c_cec,
+ &adv7511_cec_regmap_config);
+ if (IS_ERR(adv->regmap_cec)) {
+ ret = PTR_ERR(adv->regmap_cec);
+ goto err;
+ }
+
+ if (adv->type == ADV7533) {
+ ret = adv7533_patch_cec_registers(adv);
+ if (ret)
+ goto err;
+ }
+
+ return 0;
+err:
+ i2c_unregister_device(adv->i2c_cec);
+ return ret;
+}
+
static int adv7511_parse_dt(struct device_node *np,
struct adv7511_link_config *config)
{
struct device *dev = &i2c->dev;
unsigned int main_i2c_addr = i2c->addr << 1;
unsigned int edid_i2c_addr = main_i2c_addr + 4;
+ unsigned int offset;
unsigned int val;
int ret;
goto uninit_regulators;
}
- if (adv7511->type == ADV7533) {
- ret = adv7533_init_cec(adv7511);
- if (ret)
- goto err_i2c_unregister_edid;
- }
+ ret = adv7511_init_cec_regmap(adv7511);
+ if (ret)
+ goto err_i2c_unregister_edid;
INIT_WORK(&adv7511->hpd_work, adv7511_hpd_work);
goto err_unregister_cec;
}
- /* CEC is unused for now */
- regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL,
- ADV7511_CEC_CTRL_POWER_DOWN);
-
adv7511_power_off(adv7511);
i2c_set_clientdata(i2c, adv7511);
adv7511_audio_init(dev, adv7511);
+ offset = adv7511->type == ADV7533 ? ADV7533_REG_CEC_OFFSET : 0;
+
+#ifdef CONFIG_DRM_I2C_ADV7511_CEC
+ ret = adv7511_cec_init(dev, adv7511, offset);
+ if (ret)
+ goto err_unregister_cec;
+#else
+ regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL + offset,
+ ADV7511_CEC_CTRL_POWER_DOWN);
+#endif
+
return 0;
err_unregister_cec:
- adv7533_uninit_cec(adv7511);
+ i2c_unregister_device(adv7511->i2c_cec);
+ if (adv7511->cec_clk)
+ clk_disable_unprepare(adv7511->cec_clk);
err_i2c_unregister_edid:
i2c_unregister_device(adv7511->i2c_edid);
uninit_regulators:
{
struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
- if (adv7511->type == ADV7533) {
+ if (adv7511->type == ADV7533)
adv7533_detach_dsi(adv7511);
- adv7533_uninit_cec(adv7511);
- }
+ i2c_unregister_device(adv7511->i2c_cec);
+ if (adv7511->cec_clk)
+ clk_disable_unprepare(adv7511->cec_clk);
adv7511_uninit_regulators(adv7511);
adv7511_audio_exit(adv7511);
+ cec_unregister_adapter(adv7511->cec_adap);
+
i2c_unregister_device(adv7511->i2c_edid);
return 0;
projects / platform / kernel / linux-starfive.git / commitdiff