--- /dev/null
+/*
+ * Samsung MHL interface driver
+ *
+ * Copyright (C) 2011 Samsung Electronics Co.Ltd
+ * Author: Tomasz Stanislawski <t.stanislaws@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/freezer.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kthread.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/machine.h>
+#include <linux/slab.h>
+
+#include <mach/gpio.h>
+#include <plat/gpio-cfg.h>
+
+#include <media/sii9234.h>
+#include <media/v4l2-subdev.h>
+
+MODULE_AUTHOR("Tomasz Stanislawski <t.stanislaws@samsung.com>");
+MODULE_DESCRIPTION("Samsung MHL interface driver");
+MODULE_LICENSE("GPL");
+
+struct sii9234_context {
+ struct i2c_client *client;
+ struct regulator *power;
+ int gpio_n_reset;
+ struct v4l2_subdev sd;
+};
+
+static inline struct sii9234_context *sd_to_context(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct sii9234_context, sd);
+}
+
+static inline int sii9234_readb(struct i2c_client *client, int addr)
+{
+ return i2c_smbus_read_byte_data(client, addr);
+}
+
+static inline int sii9234_writeb(struct i2c_client *client, int addr, int value)
+{
+ return i2c_smbus_write_byte_data(client, addr, value);
+}
+
+static inline int sii9234_writeb_mask(struct i2c_client *client, int addr,
+ int value, int mask)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(client, addr);
+ if (ret < 0)
+ return ret;
+ ret = (ret & ~mask) | (value & mask);
+ return i2c_smbus_write_byte_data(client, addr, ret);
+}
+
+static inline int sii9234_readb_idx(struct i2c_client *client, int addr)
+{
+ int ret;
+ ret = i2c_smbus_write_byte_data(client, 0xbc, addr >> 8);
+ if (ret < 0)
+ return ret;
+ ret = i2c_smbus_write_byte_data(client, 0xbd, addr & 0xff);
+ if (ret < 0)
+ return ret;
+ return i2c_smbus_read_byte_data(client, 0xbe);
+}
+
+static inline int sii9234_writeb_idx(struct i2c_client *client, int addr,
+ int value)
+{
+ int ret;
+ ret = i2c_smbus_write_byte_data(client, 0xbc, addr >> 8);
+ if (ret < 0)
+ return ret;
+ ret = i2c_smbus_write_byte_data(client, 0xbd, addr & 0xff);
+ if (ret < 0)
+ return ret;
+ ret = i2c_smbus_write_byte_data(client, 0xbe, value);
+ return ret;
+}
+
+static inline int sii9234_writeb_idx_mask(struct i2c_client *client, int addr,
+ int value, int mask)
+{
+ int ret;
+
+ ret = sii9234_readb_idx(client, addr);
+ if (ret < 0)
+ return ret;
+ ret = (ret & ~mask) | (value & mask);
+ return sii9234_writeb_idx(client, addr, ret);
+}
+
+static int sii9234_reset(struct sii9234_context *ctx)
+{
+ struct i2c_client *client = ctx->client;
+ struct device *dev = &client->dev;
+ int ret, tries;
+
+ gpio_direction_output(ctx->gpio_n_reset, 1);
+ mdelay(1);
+ gpio_direction_output(ctx->gpio_n_reset, 0);
+ mdelay(1);
+ gpio_direction_output(ctx->gpio_n_reset, 1);
+ mdelay(1);
+
+ /* going to TTPI mode */
+ ret = sii9234_writeb(client, 0xc7, 0);
+ if (ret < 0) {
+ dev_err(dev, "failed to set TTPI mode\n");
+ return ret;
+ }
+ for (tries = 0; tries < 100 ; ++tries) {
+ ret = sii9234_readb(client, 0x1b);
+ if (ret > 0)
+ break;
+ if (ret < 0) {
+ dev_err(dev, "failed to reset device\n");
+ return -EIO;
+ }
+ mdelay(1);
+ }
+ if (tries == 100) {
+ dev_err(dev, "maximal number of tries reached\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int sii9234_verify_version(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ int family, rev, tpi_rev, dev_id, sub_id, hdcp, id;
+
+ family = sii9234_readb(client, 0x1b);
+ rev = sii9234_readb(client, 0x1c) & 0x0f;
+ tpi_rev = sii9234_readb(client, 0x1d) & 0x7f;
+ dev_id = sii9234_readb_idx(client, 0x0103);
+ sub_id = sii9234_readb_idx(client, 0x0102);
+ hdcp = sii9234_readb(client, 0x30);
+
+ if (family < 0 || rev < 0 || tpi_rev < 0 || dev_id < 0 ||
+ sub_id < 0 || hdcp < 0) {
+ dev_err(dev, "failed to read chip's version\n");
+ return -EIO;
+ }
+
+ id = (dev_id << 8) | sub_id;
+
+ dev_info(dev, "chip: SiL%02x family: %02x, rev: %02x\n",
+ id, family, rev);
+ dev_info(dev, "tpi_rev:%02x, hdcp: %02x\n", tpi_rev, hdcp);
+ if (id != 0x9234) {
+ dev_err(dev, "not supported chip\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static u8 data[][3] = {
+/* setup from driver created by doonsoo45.kim */
+ { 0x01, 0x05, 0x04 }, /* Enable Auto soft reset on SCDT = 0 */
+ { 0x01, 0x08, 0x35 }, /* Power Up TMDS Tx Core */
+ { 0x01, 0x0d, 0x1c }, /* HDMI Transcode mode enable */
+ { 0x01, 0x2b, 0x01 }, /* Enable HDCP Compliance workaround */
+ { 0x01, 0x79, 0x40 }, /* daniel test...MHL_INT */
+ { 0x01, 0x80, 0x34 }, /* Enable Rx PLL Clock Value */
+ { 0x01, 0x90, 0x27 }, /* Enable CBUS discovery */
+ { 0x01, 0x91, 0xe5 }, /* Skip RGND detection */
+ { 0x01, 0x92, 0x46 }, /* Force MHD mode */
+ { 0x01, 0x93, 0xdc }, /* Disable CBUS pull-up during RGND measurement */
+ { 0x01, 0x94, 0x66 }, /* 1.8V CBUS VTH & GND threshold */
+ { 0x01, 0x95, 0x31 }, /* RGND block & single discovery attempt */
+ { 0x01, 0x96, 0x22 }, /* use 1K and 2K setting */
+ { 0x01, 0xa0, 0x10 }, /* SIMG: Term mode */
+ { 0x01, 0xa1, 0xfc }, /* Disable internal Mobile HD driver */
+ { 0x01, 0xa3, 0xfa }, /* SIMG: Output Swing default EB, 3x Clk Mult */
+ { 0x01, 0xa5, 0x80 }, /* SIMG: RGND Hysterisis, 3x mode for Beast */
+ { 0x01, 0xa6, 0x0c }, /* SIMG: Swing Offset */
+ { 0x02, 0x3d, 0x3f }, /* Power up CVCC 1.2V core */
+ { 0x03, 0x00, 0x00 }, /* SIMG: correcting HW default */
+ { 0x03, 0x11, 0x01 }, /* Enable TxPLL Clock */
+ { 0x03, 0x12, 0x15 }, /* Enable Tx Clock Path & Equalizer */
+ { 0x03, 0x13, 0x60 }, /* SIMG: Set termination value */
+ { 0x03, 0x14, 0xf0 }, /* SIMG: Change CKDT level */
+ { 0x03, 0x17, 0x07 }, /* SIMG: PLL Calrefsel */
+ { 0x03, 0x1a, 0x20 }, /* VCO Cal */
+ { 0x03, 0x22, 0xe0 }, /* SIMG: Auto EQ */
+ { 0x03, 0x23, 0xc0 }, /* SIMG: Auto EQ */
+ { 0x03, 0x24, 0xa0 }, /* SIMG: Auto EQ */
+ { 0x03, 0x25, 0x80 }, /* SIMG: Auto EQ */
+ { 0x03, 0x26, 0x60 }, /* SIMG: Auto EQ */
+ { 0x03, 0x27, 0x40 }, /* SIMG: Auto EQ */
+ { 0x03, 0x28, 0x20 }, /* SIMG: Auto EQ */
+ { 0x03, 0x29, 0x00 }, /* SIMG: Auto EQ */
+ { 0x03, 0x31, 0x0b }, /* SIMG: Rx PLL BW value from I2C BW ~ 4MHz */
+ { 0x03, 0x45, 0x06 }, /* SIMG: DPLL Mode */
+ { 0x03, 0x4b, 0x06 }, /* SIMG: Correcting HW default */
+ { 0x03, 0x4c, 0xa0 }, /* Manual zone control */
+ { 0x03, 0x4d, 0x02 }, /* SIMG: PLL Mode Value (order is important) */
+};
+
+static int sii9234_set_internal(struct sii9234_context *ctx)
+{
+ struct i2c_client *client = ctx->client;
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(data); ++i) {
+ int addr = (data[i][0] << 8) | data[i][1];
+ ret = sii9234_writeb_idx(client, addr, data[i][2]);
+ if (ret < 0)
+ return ret;
+ }
+ return 0;
+}
+
+static int sii9234_runtime_suspend(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct sii9234_context *ctx = sd_to_context(sd);
+ struct i2c_client *client = ctx->client;
+
+ dev_info(dev, "suspend start\n");
+
+ sii9234_writeb_mask(client, 0x1e, 3, 3);
+ regulator_disable(ctx->power);
+
+ return 0;
+}
+
+static int sii9234_runtime_resume(struct device *dev)
+{
+ struct v4l2_subdev *sd = dev_get_drvdata(dev);
+ struct sii9234_context *ctx = sd_to_context(sd);
+ struct i2c_client *client = ctx->client;
+ int ret;
+
+ dev_info(dev, "resume start\n");
+ regulator_enable(ctx->power);
+
+ ret = sii9234_reset(ctx);
+ if (ret)
+ goto fail;
+
+ /* enable tpi */
+ ret = sii9234_writeb_mask(client, 0x1e, 1, 0);
+ if (ret < 0)
+ goto fail;
+ ret = sii9234_set_internal(ctx);
+ if (ret < 0)
+ goto fail;
+
+ return 0;
+
+fail:
+ dev_err(dev, "failed to resume\n");
+ regulator_disable(ctx->power);
+
+ return ret;
+}
+
+static const struct dev_pm_ops sii9234_pm_ops = {
+ .runtime_suspend = sii9234_runtime_suspend,
+ .runtime_resume = sii9234_runtime_resume,
+};
+
+static int sii9234_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct sii9234_context *ctx = sd_to_context(sd);
+ int ret;
+
+ if (on)
+ ret = pm_runtime_get_sync(&ctx->client->dev);
+ else
+ ret = pm_runtime_put(&ctx->client->dev);
+ /* only values < 0 indicate errors */
+ return IS_ERR_VALUE(ret) ? ret : 0;
+}
+
+static int sii9234_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct sii9234_context *ctx = sd_to_context(sd);
+
+ /* (dis/en)able TDMS output */
+ sii9234_writeb_mask(ctx->client, 0x1a, enable ? 0 : ~0 , 1 << 4);
+ return 0;
+}
+
+static const struct v4l2_subdev_core_ops sii9234_core_ops = {
+ .s_power = sii9234_s_power,
+};
+
+static const struct v4l2_subdev_video_ops sii9234_video_ops = {
+ .s_stream = sii9234_s_stream,
+};
+
+static const struct v4l2_subdev_ops sii9234_ops = {
+ .core = &sii9234_core_ops,
+ .video = &sii9234_video_ops,
+};
+
+static int __devinit sii9234_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct sii9234_platform_data *pdata = dev->platform_data;
+ struct sii9234_context *ctx;
+ int ret;
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx) {
+ dev_err(dev, "out of memory\n");
+ ret = -ENOMEM;
+ goto fail;
+ }
+ ctx->client = client;
+
+ ctx->power = regulator_get(dev, "hdmi-en");
+ if (IS_ERR(ctx->power)) {
+ dev_err(dev, "failed to acquire regulator hdmi-en\n");
+ ret = PTR_ERR(ctx->power);
+ goto fail_ctx;
+ }
+
+ ctx->gpio_n_reset = pdata->gpio_n_reset;
+ ret = gpio_request(ctx->gpio_n_reset, "MHL_RST");
+ if (ret) {
+ dev_err(dev, "failed to acquire MHL_RST gpio\n");
+ goto fail_power;
+ }
+
+ v4l2_i2c_subdev_init(&ctx->sd, client, &sii9234_ops);
+
+ pm_runtime_enable(dev);
+
+ /* enable device */
+ ret = pm_runtime_get_sync(dev);
+ if (ret)
+ goto fail_pm;
+
+ /* verify chip version */
+ ret = sii9234_verify_version(client);
+ if (ret)
+ goto fail_pm_get;
+
+ /* stop processing */
+ pm_runtime_put(dev);
+
+ dev_info(dev, "probe successful\n");
+
+ return 0;
+
+fail_pm_get:
+ pm_runtime_put_sync(dev);
+
+fail_pm:
+ pm_runtime_disable(dev);
+ gpio_free(ctx->gpio_n_reset);
+
+fail_power:
+ regulator_put(ctx->power);
+
+fail_ctx:
+ kfree(ctx);
+
+fail:
+ dev_err(dev, "probe failed\n");
+
+ return ret;
+}
+
+static int __devexit sii9234_remove(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct sii9234_context *ctx = sd_to_context(sd);
+
+ pm_runtime_disable(dev);
+ gpio_free(ctx->gpio_n_reset);
+ regulator_put(ctx->power);
+ kfree(ctx);
+
+ dev_info(dev, "remove successful\n");
+
+ return 0;
+}
+
+
+static const struct i2c_device_id sii9234_id[] = {
+ { "SII9234", 0 },
+ { },
+};
+
+MODULE_DEVICE_TABLE(i2c, sii9234_id);
+static struct i2c_driver sii9234_driver = {
+ .driver = {
+ .name = "sii9234",
+ .owner = THIS_MODULE,
+ .pm = &sii9234_pm_ops,
+ },
+ .probe = sii9234_probe,
+ .remove = __devexit_p(sii9234_remove),
+ .id_table = sii9234_id,
+};
+
+static int __init sii9234_init(void)
+{
+ return i2c_add_driver(&sii9234_driver);
+}
+module_init(sii9234_init);
+
+static void __exit sii9234_exit(void)
+{
+ i2c_del_driver(&sii9234_driver);
+}
+module_exit(sii9234_exit);
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff