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Date: Mon, 1 Dec 2014 16:56:01 -0500
From: Jilai Wang <jilaiw@...eaurora.org>
To: dri-devel@...ts.freedesktop.org
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
robdclark@...il.com, Jilai Wang <jilaiw@...eaurora.org>
Subject: [PATCH 2/2] drm/msm/hdmi: add hdmi hdcp support
Add HDMI HDCP support including HDCP PartI/II/III authentication.
Signed-off-by: Jilai Wang <jilaiw@...eaurora.org>
---
drivers/gpu/drm/msm/Makefile | 1 +
drivers/gpu/drm/msm/hdmi/hdmi.c | 44 +
drivers/gpu/drm/msm/hdmi/hdmi.h | 31 +
drivers/gpu/drm/msm/hdmi/hdmi_audio.c | 1 -
drivers/gpu/drm/msm/hdmi/hdmi_bridge.c | 3 +-
drivers/gpu/drm/msm/hdmi/hdmi_connector.c | 7 +-
drivers/gpu/drm/msm/hdmi/hdmi_hdcp.c | 1600 +++++++++++++++++++++++++++++
7 files changed, 1682 insertions(+), 5 deletions(-)
create mode 100644 drivers/gpu/drm/msm/hdmi/hdmi_hdcp.c
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile
index 6283dcb..9d88ff3 100644
--- a/drivers/gpu/drm/msm/Makefile
+++ b/drivers/gpu/drm/msm/Makefile
@@ -11,6 +11,7 @@ msm-y := \
hdmi/hdmi_audio.o \
hdmi/hdmi_bridge.o \
hdmi/hdmi_connector.o \
+ hdmi/hdmi_hdcp.o \
hdmi/hdmi_i2c.o \
hdmi/hdmi_phy_8960.o \
hdmi/hdmi_phy_8x60.o \
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c
index 9d00dcb..f0111c0 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.c
@@ -20,7 +20,9 @@
void hdmi_set_mode(struct hdmi *hdmi, bool power_on)
{
uint32_t ctrl = 0;
+ unsigned long flags;
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
if (power_on) {
ctrl |= HDMI_CTRL_ENABLE;
if (!hdmi->hdmi_mode) {
@@ -35,6 +37,7 @@ void hdmi_set_mode(struct hdmi *hdmi, bool power_on)
}
hdmi_write(hdmi, REG_HDMI_CTRL, ctrl);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
DBG("HDMI Core: %s, HDMI_CTRL=0x%08x",
power_on ? "Enable" : "Disable", ctrl);
}
@@ -49,6 +52,9 @@ irqreturn_t hdmi_irq(int irq, void *dev_id)
/* Process DDC: */
hdmi_i2c_irq(hdmi->i2c);
+ /* Process HDCP: */
+ hdmi_hdcp_irq(hdmi->hdcp_ctrl);
+
/* TODO audio.. */
return IRQ_HANDLED;
@@ -59,6 +65,16 @@ void hdmi_destroy(struct kref *kref)
struct hdmi *hdmi = container_of(kref, struct hdmi, refcount);
struct hdmi_phy *phy = hdmi->phy;
+ /*
+ * at this point, hpd has been disabled,
+ * after flush workq, it's safe to deinit hdcp
+ */
+ if (hdmi->workq) {
+ flush_workqueue(hdmi->workq);
+ destroy_workqueue(hdmi->workq);
+ }
+ hdmi_hdcp_destroy(hdmi);
+
if (phy)
phy->funcs->destroy(phy);
@@ -75,6 +91,7 @@ struct hdmi *hdmi_init(struct drm_device *dev, struct drm_encoder *encoder)
struct msm_drm_private *priv = dev->dev_private;
struct platform_device *pdev = priv->hdmi_pdev;
struct hdmi_platform_config *config;
+ struct resource *res;
int i, ret;
if (!pdev) {
@@ -97,6 +114,7 @@ struct hdmi *hdmi_init(struct drm_device *dev, struct drm_encoder *encoder)
hdmi->pdev = pdev;
hdmi->config = config;
hdmi->encoder = encoder;
+ spin_lock_init(&hdmi->reg_lock);
hdmi_audio_infoframe_init(&hdmi->audio.infoframe);
@@ -119,6 +137,22 @@ struct hdmi *hdmi_init(struct drm_device *dev, struct drm_encoder *encoder)
goto fail;
}
+ /* HDCP needs physical address of hdmi register */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ config->mmio_name);
+ hdmi->mmio_phy_addr = res->start;
+
+ if (config->qfprom_mmio_name) {
+ hdmi->qfprom_mmio = msm_ioremap(pdev,
+ config->qfprom_mmio_name, "HDMI_QFPROM");
+ if (IS_ERR(hdmi->qfprom_mmio)) {
+ dev_info(&pdev->dev, "can't find qfprom resource\n");
+ hdmi->qfprom_mmio = NULL;
+ }
+ } else {
+ hdmi->qfprom_mmio = NULL;
+ }
+
BUG_ON(config->hpd_reg_cnt > ARRAY_SIZE(hdmi->hpd_regs));
for (i = 0; i < config->hpd_reg_cnt; i++) {
struct regulator *reg;
@@ -181,6 +215,8 @@ struct hdmi *hdmi_init(struct drm_device *dev, struct drm_encoder *encoder)
hdmi->pwr_clks[i] = clk;
}
+ hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0);
+
hdmi->i2c = hdmi_i2c_init(hdmi);
if (IS_ERR(hdmi->i2c)) {
ret = PTR_ERR(hdmi->i2c);
@@ -205,6 +241,13 @@ struct hdmi *hdmi_init(struct drm_device *dev, struct drm_encoder *encoder)
goto fail;
}
+ hdmi->hdcp_ctrl = hdmi_hdcp_init(hdmi);
+ if (IS_ERR(hdmi->hdcp_ctrl)) {
+ ret = PTR_ERR(hdmi->hdcp_ctrl);
+ dev_warn(dev->dev, "failed to init hdcp: %d(disabled)\n", ret);
+ hdmi->hdcp_ctrl = NULL;
+ }
+
if (!config->shared_irq) {
hdmi->irq = platform_get_irq(pdev, 0);
if (hdmi->irq < 0) {
@@ -314,6 +357,7 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data)
}
config.mmio_name = "core_physical";
+ config.qfprom_mmio_name = "qfprom_physical";
config.ddc_clk_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-ddc-clk");
config.ddc_data_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-ddc-data");
config.hpd_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-hpd");
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h
index b981995..10c4ea6 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.h
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.h
@@ -37,6 +37,8 @@ struct hdmi_audio {
int rate;
};
+struct hdmi_hdcp_ctrl;
+
struct hdmi {
struct kref refcount;
@@ -53,6 +55,8 @@ struct hdmi {
unsigned long int pixclock;
void __iomem *mmio;
+ void __iomem *qfprom_mmio;
+ phys_addr_t mmio_phy_addr;
struct regulator *hpd_regs[2];
struct regulator *pwr_regs[2];
@@ -70,12 +74,25 @@ struct hdmi {
bool hdmi_mode; /* are we in hdmi mode? */
int irq;
+ struct workqueue_struct *workq;
+
+ struct hdmi_hdcp_ctrl *hdcp_ctrl;
+
+ /*
+ * spinlock to protect registers shared by different execution
+ * REG_HDMI_CTRL
+ * REG_HDMI_DDC_ARBITRATION
+ * REG_HDMI_HDCP_INT_CTRL
+ * REG_HDMI_HPD_CTRL
+ */
+ spinlock_t reg_lock;
};
/* platform config data (ie. from DT, or pdata) */
struct hdmi_platform_config {
struct hdmi_phy *(*phy_init)(struct hdmi *hdmi);
const char *mmio_name;
+ const char *qfprom_mmio_name;
/* regulators that need to be on for hpd: */
const char **hpd_reg_names;
@@ -115,6 +132,11 @@ static inline u32 hdmi_read(struct hdmi *hdmi, u32 reg)
return msm_readl(hdmi->mmio + reg);
}
+static inline u32 hdmi_qfprom_read(struct hdmi *hdmi, u32 reg)
+{
+ return msm_readl(hdmi->qfprom_mmio + reg);
+}
+
static inline struct hdmi * hdmi_reference(struct hdmi *hdmi)
{
kref_get(&hdmi->refcount);
@@ -179,4 +201,13 @@ void hdmi_i2c_irq(struct i2c_adapter *i2c);
void hdmi_i2c_destroy(struct i2c_adapter *i2c);
struct i2c_adapter *hdmi_i2c_init(struct hdmi *hdmi);
+/*
+ * hdcp
+ */
+void hdmi_hdcp_irq(struct hdmi_hdcp_ctrl *hdcp_ctrl);
+struct hdmi_hdcp_ctrl *hdmi_hdcp_init(struct hdmi *hdmi);
+void hdmi_hdcp_destroy(struct hdmi *hdmi);
+int hdmi_hdcp_on(struct hdmi *hdmi);
+void hdmi_hdcp_off(struct hdmi *hdmi);
+
#endif /* __HDMI_CONNECTOR_H__ */
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_audio.c b/drivers/gpu/drm/msm/hdmi/hdmi_audio.c
index 872485f..df232e2 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_audio.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_audio.c
@@ -203,7 +203,6 @@ int hdmi_audio_update(struct hdmi *hdmi)
audio_config |= HDMI_AUDIO_CFG_FIFO_WATERMARK(4);
audio_config |= HDMI_AUDIO_CFG_ENGINE_ENABLE;
} else {
- hdmi_write(hdmi, REG_HDMI_GC, HDMI_GC_MUTE);
acr_pkt_ctrl &= ~HDMI_ACR_PKT_CTRL_CONT;
acr_pkt_ctrl &= ~HDMI_ACR_PKT_CTRL_SEND;
vbi_pkt_ctrl &= ~HDMI_VBI_PKT_CTRL_GC_ENABLE;
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
index f6cf745..de6bc56 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -106,6 +106,7 @@ static void hdmi_bridge_pre_enable(struct drm_bridge *bridge)
phy->funcs->powerup(phy, hdmi->pixclock);
hdmi_set_mode(hdmi, true);
+ hdmi_hdcp_on(hdmi);
}
static void hdmi_bridge_enable(struct drm_bridge *bridge)
@@ -146,8 +147,6 @@ static void hdmi_bridge_mode_set(struct drm_bridge *bridge,
hdmi->pixclock = mode->clock * 1000;
- hdmi->hdmi_mode = drm_match_cea_mode(mode) > 1;
-
hstart = mode->htotal - mode->hsync_start;
hend = mode->htotal - mode->hsync_start + mode->hdisplay;
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c
index 4aca2a3..4256669 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c
@@ -140,6 +140,7 @@ static int hpd_enable(struct hdmi_connector *hdmi_connector)
struct hdmi_phy *phy = hdmi->phy;
uint32_t hpd_ctrl;
int i, ret;
+ unsigned long flags;
ret = gpio_config(hdmi, true);
if (ret) {
@@ -185,6 +186,7 @@ static int hpd_enable(struct hdmi_connector *hdmi_connector)
HDMI_HPD_INT_CTRL_INT_EN);
/* set timeout to 4.1ms (max) for hardware debounce */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
hpd_ctrl = hdmi_read(hdmi, REG_HDMI_HPD_CTRL);
hpd_ctrl |= HDMI_HPD_CTRL_TIMEOUT(0x1fff);
@@ -193,6 +195,7 @@ static int hpd_enable(struct hdmi_connector *hdmi_connector)
~HDMI_HPD_CTRL_ENABLE & hpd_ctrl);
hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
HDMI_HPD_CTRL_ENABLE | hpd_ctrl);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
return 0;
@@ -248,7 +251,6 @@ hotplug_work(struct work_struct *work)
void hdmi_connector_irq(struct drm_connector *connector)
{
struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
- struct msm_drm_private *priv = connector->dev->dev_private;
struct hdmi *hdmi = hdmi_connector->hdmi;
uint32_t hpd_int_status, hpd_int_ctrl;
@@ -272,7 +274,7 @@ void hdmi_connector_irq(struct drm_connector *connector)
hpd_int_ctrl |= HDMI_HPD_INT_CTRL_INT_CONNECT;
hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl);
- queue_work(priv->wq, &hdmi_connector->hpd_work);
+ queue_work(hdmi->workq, &hdmi_connector->hpd_work);
}
}
@@ -350,6 +352,7 @@ static int hdmi_connector_get_modes(struct drm_connector *connector)
hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
+ hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
drm_mode_connector_update_edid_property(connector, edid);
if (edid) {
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_hdcp.c b/drivers/gpu/drm/msm/hdmi/hdmi_hdcp.c
new file mode 100644
index 0000000..6996466
--- /dev/null
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_hdcp.c
@@ -0,0 +1,1600 @@
+/* Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include "hdmi.h"
+#include <soc/qcom/scm.h>
+
+#define TZ_HDCP_CMD_ID 0x00004401
+#define HDCP_REG_ENABLE 0x01
+#define HDCP_REG_DISABLE 0x00
+#define HDCP_PORT_ADDR 0x74
+
+#define HDCP_INT_CLR (BIT(1) | BIT(5) | BIT(7) | BIT(9) | BIT(13))
+#define HDCP_INT_STATUS (BIT(0) | BIT(4) | BIT(8) | BIT(12))
+
+#define AUTH_WORK_RETRIES_TIME (100)
+#define AUTH_RETRIES_TIME (30)
+
+/* QFPROM Registers for HDMI/HDCP */
+#define QFPROM_RAW_FEAT_CONFIG_ROW0_LSB (0x000000F8)
+#define QFPROM_RAW_FEAT_CONFIG_ROW0_MSB (0x000000FC)
+#define HDCP_KSV_LSB (0x000060D8)
+#define HDCP_KSV_MSB (0x000060DC)
+
+enum DS_TYPE { /* type of downstream device */
+ DS_UNKNOWN,
+ DS_RECEIVER,
+ DS_REPEATER,
+};
+
+enum hdmi_hdcp_state {
+ HDCP_STATE_INACTIVE,
+ HDCP_STATE_AUTHENTICATING,
+ HDCP_STATE_AUTHENTICATED,
+ HDCP_STATE_AUTH_FAIL
+};
+
+struct hdmi_hdcp_reg_data {
+ uint32_t reg_id;
+ uint32_t off;
+ char *name;
+ uint32_t reg_val;
+};
+
+struct hdmi_hdcp_ctrl {
+ struct hdmi *hdmi;
+ uint32_t auth_retries;
+ uint32_t tz_hdcp;
+ enum hdmi_hdcp_state hdcp_state;
+ struct mutex state_mutex;
+ struct delayed_work hdcp_reauth_work;
+ struct delayed_work hdcp_auth_part1_1_work;
+ struct delayed_work hdcp_auth_part1_2_work;
+ struct work_struct hdcp_auth_part1_3_work;
+ struct delayed_work hdcp_auth_part2_1_work;
+ struct delayed_work hdcp_auth_part2_2_work;
+ struct delayed_work hdcp_auth_part2_3_work;
+ struct delayed_work hdcp_auth_part2_4_work;
+ struct work_struct hdcp_auth_prepare_work;
+ uint32_t work_retry_cnt;
+ uint32_t ksv_fifo_w_index;
+
+ /*
+ * store aksv from qfprom
+ */
+ uint8_t aksv[5];
+ bool aksv_valid;
+ uint32_t ds_type;
+ uint8_t bksv[5];
+ uint8_t dev_count;
+ uint8_t depth;
+ uint8_t ksv_list[5 * 127];
+ bool max_cascade_exceeded;
+ bool max_dev_exceeded;
+};
+
+static int hdmi_ddc_read(struct hdmi *hdmi, uint16_t addr, uint8_t offset,
+ uint8_t *data, uint16_t data_len, bool no_align)
+{
+ int rc = 0;
+ int retry = 5;
+ uint8_t *buf = NULL;
+ uint32_t request_len;
+ struct i2c_msg msgs[] = {
+ {
+ .addr = addr >> 1,
+ .flags = 0,
+ .len = 1,
+ .buf = &offset,
+ }, {
+ .addr = addr >> 1,
+ .flags = I2C_M_RD,
+ .len = data_len,
+ .buf = data,
+ }
+ };
+
+ DBG("Start DDC read");
+retry:
+ if (no_align) {
+ rc = i2c_transfer(hdmi->i2c, msgs, 2);
+ } else {
+ request_len = 32 * ((data_len + 31) / 32);
+ buf = kmalloc(request_len, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ msgs[1].buf = buf;
+ rc = i2c_transfer(hdmi->i2c, msgs, 2);
+ }
+
+ retry--;
+ if (rc == 2) {
+ rc = 0;
+ if (!no_align)
+ memcpy(data, buf, data_len);
+ } else if (retry > 0) {
+ goto retry;
+ } else {
+ rc = -EIO;
+ }
+
+ kfree(buf);
+ DBG("End DDC read %d", rc);
+
+ return rc;
+}
+
+static int hdmi_ddc_write(struct hdmi *hdmi, uint16_t addr, uint8_t offset,
+ uint8_t *data, uint16_t data_len)
+{
+ int rc = 0;
+ int retry = 10;
+ uint8_t *buf = NULL;
+ struct i2c_msg msgs[] = {
+ {
+ .addr = addr >> 1,
+ .flags = 0,
+ .len = 1,
+ }
+ };
+
+ DBG("Start DDC write");
+ buf = kmalloc(data_len + 1, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ buf[0] = offset;
+ memcpy(&buf[1], data, data_len);
+ msgs[0].buf = buf;
+ msgs[0].len = data_len + 1;
+retry:
+ rc = i2c_transfer(hdmi->i2c, msgs, 1);
+
+ retry--;
+ if (rc == 1)
+ rc = 0;
+ else if (retry > 0)
+ goto retry;
+ else
+ rc = -EIO;
+
+ kfree(buf);
+ DBG("End DDC write %d", rc);
+
+ return rc;
+}
+
+static int hdmi_hdcp_scm_wr(struct hdmi_hdcp_ctrl *hdcp_ctrl, uint32_t *preg,
+ uint32_t *pdata, uint32_t count)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ struct scm_hdcp_req scm_buf[SCM_HDCP_MAX_REG];
+ uint32_t resp, phy_addr, idx = 0;
+ int i, ret = 0;
+
+ if (count == 0)
+ return 0;
+
+ if (!preg || !pdata) {
+ pr_err("%s: Invalid pointer\n", __func__);
+ return -EINVAL;
+ }
+
+ if (hdcp_ctrl->tz_hdcp) {
+ phy_addr = (uint32_t)hdmi->mmio_phy_addr;
+
+ while (count) {
+ memset(scm_buf, 0, sizeof(scm_buf));
+ for (i = 0; i < count && i < SCM_HDCP_MAX_REG; i++) {
+ scm_buf[i].addr = phy_addr + preg[idx];
+ scm_buf[i].val = pdata[idx];
+ idx++;
+ }
+ ret = scm_call(SCM_SVC_HDCP, SCM_CMD_HDCP,
+ scm_buf, sizeof(scm_buf), &resp, sizeof(resp));
+
+ if (ret || resp) {
+ pr_err("%s: error: scm_call ret = %d, resp = %d\n",
+ __func__, ret, resp);
+ ret = -EINVAL;
+ break;
+ }
+
+ count -= i;
+ }
+ } else {
+ for (i = 0; i < count; i++)
+ hdmi_write(hdmi, preg[i], pdata[i]);
+ }
+
+ return ret;
+}
+
+void hdmi_hdcp_irq(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi;
+ uint32_t regval, hdcp_int_status;
+ unsigned long flags;
+
+ if (!hdcp_ctrl) {
+ DBG("HDCP is disabled");
+ return;
+ }
+
+ hdmi = hdcp_ctrl->hdmi;
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ regval = hdmi_read(hdmi, REG_HDMI_HDCP_INT_CTRL);
+ hdcp_int_status = regval & HDCP_INT_STATUS;
+ if (!hdcp_int_status) {
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+ return;
+ }
+ /* Clear Interrupts */
+ regval |= hdcp_int_status << 1;
+ /* Clear AUTH_FAIL_INFO as well */
+ if (hdcp_int_status & BIT(4))
+ regval |= BIT(7);
+ hdmi_write(hdmi, REG_HDMI_HDCP_INT_CTRL, regval);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ DBG("hdcp irq %x", regval);
+ if (hdcp_int_status & BIT(0)) {
+ /* AUTH_SUCCESS_INT */
+ pr_info("%s:AUTH_SUCCESS_INT received\n", __func__);
+ if (HDCP_STATE_AUTHENTICATING == hdcp_ctrl->hdcp_state)
+ queue_work(hdmi->workq,
+ &hdcp_ctrl->hdcp_auth_part1_3_work);
+ }
+
+ if (hdcp_int_status & BIT(4)) {
+ /* AUTH_FAIL_INT */
+ regval = hdmi_read(hdmi, REG_HDMI_HDCP_LINK0_STATUS);
+ pr_info("%s: AUTH_FAIL_INT rcvd, LINK0_STATUS=0x%08x\n",
+ __func__, regval);
+ if (HDCP_STATE_AUTHENTICATED == hdcp_ctrl->hdcp_state)
+ queue_delayed_work(hdmi->workq,
+ &hdcp_ctrl->hdcp_reauth_work, HZ/2);
+ else if (HDCP_STATE_AUTHENTICATING == hdcp_ctrl->hdcp_state)
+ queue_work(hdmi->workq,
+ &hdcp_ctrl->hdcp_auth_part1_3_work);
+ }
+
+ if (hdcp_int_status & BIT(8)) {
+ /* DDC_XFER_REQ_INT */
+ pr_info("%s:DDC_XFER_REQ_INT received\n", __func__);
+ }
+
+ if (hdcp_int_status & BIT(12)) {
+ /* DDC_XFER_DONE_INT */
+ pr_info("%s:DDC_XFER_DONE received\n", __func__);
+ }
+} /* hdmi_hdcp_isr */
+
+static int hdmi_hdcp_count_one(uint8_t *array, uint8_t len)
+{
+ int i, j, count = 0;
+
+ for (i = 0; i < len; i++)
+ for (j = 0; j < 8; j++)
+ count += (((array[i] >> j) & 0x1) ? 1 : 0);
+
+ return count;
+}
+
+static int hdmi_hdcp_read_validate_aksv(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ uint32_t qfprom_aksv_lsb, qfprom_aksv_msb;
+
+ /* Fetch aksv from QFPROM, this info should be public. */
+ qfprom_aksv_lsb = hdmi_qfprom_read(hdmi, HDCP_KSV_LSB);
+ qfprom_aksv_msb = hdmi_qfprom_read(hdmi, HDCP_KSV_MSB);
+
+ hdcp_ctrl->aksv[0] = qfprom_aksv_lsb & 0xFF;
+ hdcp_ctrl->aksv[1] = (qfprom_aksv_lsb >> 8) & 0xFF;
+ hdcp_ctrl->aksv[2] = (qfprom_aksv_lsb >> 16) & 0xFF;
+ hdcp_ctrl->aksv[3] = (qfprom_aksv_lsb >> 24) & 0xFF;
+ hdcp_ctrl->aksv[4] = qfprom_aksv_msb & 0xFF;
+
+ /* check there are 20 ones in AKSV */
+ if (hdmi_hdcp_count_one(hdcp_ctrl->aksv, 5) != 20) {
+ pr_err("%s: AKSV QFPROM doesn't have 20 1's, 20 0's\n",
+ __func__);
+ pr_err("%s: QFPROM AKSV chk failed (AKSV=%02x%08x)\n",
+ __func__, qfprom_aksv_msb,
+ qfprom_aksv_lsb);
+ return -EINVAL;
+ }
+ DBG("AKSV=%02x%08x", qfprom_aksv_msb, qfprom_aksv_lsb);
+
+ return 0;
+}
+
+static void reset_hdcp_ddc_failures(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int hdcp_ddc_ctrl1_reg;
+ int hdcp_ddc_status;
+ int failure;
+ int nack0;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+
+ /* Check for any DDC transfer failures */
+ hdcp_ddc_status = hdmi_read(hdmi, REG_HDMI_HDCP_DDC_STATUS);
+ failure = (hdcp_ddc_status >> 16) & 0x1;
+ nack0 = (hdcp_ddc_status >> 14) & 0x1;
+ DBG("On Entry: HDCP_DDC_STATUS=0x%x, FAIL=%d, NACK0=%d",
+ hdcp_ddc_status, failure, nack0);
+
+ if (failure == 0x1) {
+ /*
+ * Indicates that the last HDCP HW DDC transfer failed.
+ * This occurs when a transfer is attempted with HDCP DDC
+ * disabled (HDCP_DDC_DISABLE=1) or the number of retries
+ * matches HDCP_DDC_RETRY_CNT.
+ * Failure occurred, let's clear it.
+ */
+ DBG("DDC failure detected.HDCP_DDC_STATUS=0x%08x",
+ hdcp_ddc_status);
+
+ /* First, Disable DDC */
+ hdmi_write(hdmi, REG_HDMI_HDCP_DDC_CTRL_0, BIT(0));
+
+ /* ACK the Failure to Clear it */
+ hdcp_ddc_ctrl1_reg = hdmi_read(hdmi, REG_HDMI_HDCP_DDC_CTRL_1);
+ hdmi_write(hdmi, REG_HDMI_HDCP_DDC_CTRL_1,
+ hdcp_ddc_ctrl1_reg | BIT(0));
+
+ /* Check if the FAILURE got Cleared */
+ hdcp_ddc_status = hdmi_read(hdmi, REG_HDMI_HDCP_DDC_STATUS);
+ hdcp_ddc_status = (hdcp_ddc_status >> 16) & BIT(0);
+ if (hdcp_ddc_status == 0x0)
+ DBG("HDCP DDC Failure cleared");
+ else
+ pr_info("%s: Unable to clear HDCP DDC Failure\n",
+ __func__);
+
+ /* Re-Enable HDCP DDC */
+ hdmi_write(hdmi, REG_HDMI_HDCP_DDC_CTRL_0, 0);
+ }
+
+ if (nack0 == 0x1) {
+ DBG("Before: HDMI_DDC_SW_STATUS=0x%08x",
+ hdmi_read(hdmi, REG_HDMI_DDC_SW_STATUS));
+ /* Reset HDMI DDC software status */
+ hdmi_write(hdmi, REG_HDMI_DDC_CTRL,
+ hdmi_read(hdmi, REG_HDMI_DDC_CTRL) | BIT(3));
+ msleep(20);
+ hdmi_write(hdmi, REG_HDMI_DDC_CTRL,
+ hdmi_read(hdmi, REG_HDMI_DDC_CTRL) & ~(BIT(3)));
+
+ /* Reset HDMI DDC Controller */
+ hdmi_write(hdmi, REG_HDMI_DDC_CTRL,
+ hdmi_read(hdmi, REG_HDMI_DDC_CTRL) | BIT(1));
+ msleep(20);
+ hdmi_write(hdmi, REG_HDMI_DDC_CTRL,
+ hdmi_read(hdmi, REG_HDMI_DDC_CTRL) & ~BIT(1));
+ DBG("After: HDMI_DDC_SW_STATUS=0x%08x",
+ hdmi_read(hdmi, REG_HDMI_DDC_SW_STATUS));
+ }
+
+ hdcp_ddc_status = hdmi_read(hdmi, REG_HDMI_HDCP_DDC_STATUS);
+
+ failure = (hdcp_ddc_status >> 16) & BIT(0);
+ nack0 = (hdcp_ddc_status >> 14) & BIT(0);
+ DBG("On Exit: HDCP_DDC_STATUS=0x%x, FAIL=%d, NACK0=%d",
+ hdcp_ddc_status, failure, nack0);
+}
+
+static void hdmi_hdcp_hw_ddc_clean(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ uint32_t hdcp_ddc_status, ddc_hw_status;
+ uint32_t ddc_xfer_done, ddc_xfer_req, ddc_hw_done;
+ uint32_t ddc_hw_not_ready;
+ uint32_t timeout_count;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+
+ if (hdmi_read(hdmi, REG_HDMI_DDC_HW_STATUS) == 0)
+ return;
+
+ /* Wait to be clean on DDC HW engine */
+ timeout_count = 100;
+ do {
+ hdcp_ddc_status = hdmi_read(hdmi, REG_HDMI_HDCP_DDC_STATUS);
+ ddc_hw_status = hdmi_read(hdmi, REG_HDMI_DDC_HW_STATUS);
+ ddc_xfer_done = hdcp_ddc_status & BIT(10);
+ ddc_xfer_req = hdcp_ddc_status & BIT(4);
+ ddc_hw_done = ddc_hw_status & BIT(3);
+ ddc_hw_not_ready = !ddc_xfer_done ||
+ ddc_xfer_req || !ddc_hw_done;
+
+ DBG("timeout count(%d):ddc hw%sready",
+ timeout_count, ddc_hw_not_ready ? " not " : " ");
+ DBG("hdcp_ddc_status[0x%x], ddc_hw_status[0x%x]",
+ hdcp_ddc_status, ddc_hw_status);
+ if (ddc_hw_not_ready)
+ msleep(20);
+ } while (ddc_hw_not_ready && --timeout_count);
+}
+
+/*
+ * Only retries defined times then abort current authenticating process
+ */
+static int hdmi_msm_if_abort_reauth(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc = 0;
+
+ if (++hdcp_ctrl->auth_retries == AUTH_RETRIES_TIME) {
+ mutex_lock(&hdcp_ctrl->state_mutex);
+ hdcp_ctrl->hdcp_state = HDCP_STATE_INACTIVE;
+ mutex_unlock(&hdcp_ctrl->state_mutex);
+
+ hdcp_ctrl->auth_retries = 0;
+ rc = -ERANGE;
+ }
+
+ return rc;
+}
+
+static void hdmi_hdcp_reauth_work(struct work_struct *work)
+{
+ struct delayed_work *dw = to_delayed_work(work);
+ struct hdmi_hdcp_ctrl *hdcp_ctrl = container_of(dw,
+ struct hdmi_hdcp_ctrl, hdcp_reauth_work);
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ unsigned long flags;
+ int rc;
+
+ DBG("HDCP REAUTH WORK");
+ mutex_lock(&hdcp_ctrl->state_mutex);
+ hdcp_ctrl->hdcp_state = HDCP_STATE_AUTH_FAIL;
+ mutex_unlock(&hdcp_ctrl->state_mutex);
+
+ /*
+ * Disable HPD circuitry.
+ * This is needed to reset the HDCP cipher engine so that when we
+ * attempt a re-authentication, HW would clear the AN0_READY and
+ * AN1_READY bits in HDMI_HDCP_LINK0_STATUS register
+ */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
+ hdmi_read(hdmi, REG_HDMI_HPD_CTRL) & ~BIT(28));
+
+ /* Disable HDCP interrupts */
+ hdmi_write(hdmi, REG_HDMI_HDCP_INT_CTRL, 0);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ hdmi_write(hdmi, REG_HDMI_HDCP_RESET, BIT(0));
+
+ /* Wait to be clean on DDC HW engine */
+ hdmi_hdcp_hw_ddc_clean(hdcp_ctrl);
+
+ /* Disable encryption and disable the HDCP block */
+ hdmi_write(hdmi, REG_HDMI_HDCP_CTRL, 0);
+
+ /* Enable HPD circuitry */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
+ hdmi_read(hdmi, REG_HDMI_HPD_CTRL) | BIT(28));
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ rc = hdmi_msm_if_abort_reauth(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: abort reauthentication!\n", __func__);
+ return;
+ }
+
+ mutex_lock(&hdcp_ctrl->state_mutex);
+ hdcp_ctrl->hdcp_state = HDCP_STATE_AUTHENTICATING;
+ mutex_unlock(&hdcp_ctrl->state_mutex);
+ queue_work(hdmi->workq, &hdcp_ctrl->hdcp_auth_prepare_work);
+}
+
+static void hdmi_hdcp_auth_prepare_work(struct work_struct *work)
+{
+ struct hdmi_hdcp_ctrl *hdcp_ctrl = container_of(work,
+ struct hdmi_hdcp_ctrl, hdcp_auth_prepare_work);
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ uint32_t qfprom_aksv_lsb, qfprom_aksv_msb;
+ uint32_t link0_status;
+ uint32_t regval;
+ unsigned long flags;
+ int ret;
+
+ if (!hdcp_ctrl->aksv_valid) {
+ ret = hdmi_hdcp_read_validate_aksv(hdcp_ctrl);
+ if (ret) {
+ pr_err("%s: ASKV validation failed\n", __func__);
+ mutex_lock(&hdcp_ctrl->state_mutex);
+ hdcp_ctrl->hdcp_state = HDCP_STATE_INACTIVE;
+ mutex_unlock(&hdcp_ctrl->state_mutex);
+ return;
+ }
+ hdcp_ctrl->aksv_valid = true;
+ }
+
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ /* disable HDMI Encrypt */
+ regval = hdmi_read(hdmi, REG_HDMI_CTRL);
+ regval &= ~HDMI_CTRL_ENCRYPTED;
+ hdmi_write(hdmi, REG_HDMI_CTRL, regval);
+
+ /* Enabling Software DDC */
+ regval = hdmi_read(hdmi, REG_HDMI_DDC_ARBITRATION);
+ regval &= ~HDMI_DDC_ARBITRATION_HW_ARBITRATION;
+ hdmi_write(hdmi, REG_HDMI_DDC_ARBITRATION, regval);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ /*
+ * Write AKSV read from QFPROM to the HDCP registers.
+ * This step is needed for HDCP authentication and must be
+ * written before enabling HDCP.
+ */
+ qfprom_aksv_lsb = hdcp_ctrl->aksv[3];
+ qfprom_aksv_lsb = (qfprom_aksv_lsb << 8) | hdcp_ctrl->aksv[2];
+ qfprom_aksv_lsb = (qfprom_aksv_lsb << 8) | hdcp_ctrl->aksv[1];
+ qfprom_aksv_lsb = (qfprom_aksv_lsb << 8) | hdcp_ctrl->aksv[0];
+ qfprom_aksv_msb = hdcp_ctrl->aksv[4];
+ hdmi_write(hdmi, REG_HDMI_HDCP_SW_LOWER_AKSV, qfprom_aksv_lsb);
+ hdmi_write(hdmi, REG_HDMI_HDCP_SW_UPPER_AKSV, qfprom_aksv_msb);
+
+ /*
+ * HDCP setup prior to enabling HDCP_CTRL.
+ * Setup seed values for random number An.
+ */
+ hdmi_write(hdmi, REG_HDMI_HDCP_ENTROPY_CTRL0, 0xB1FFB0FF);
+ hdmi_write(hdmi, REG_HDMI_HDCP_ENTROPY_CTRL1, 0xF00DFACE);
+
+ /* Disable the RngCipher state */
+ hdmi_write(hdmi, REG_HDMI_HDCP_DEBUG_CTRL,
+ hdmi_read(hdmi, REG_HDMI_HDCP_DEBUG_CTRL) & ~(BIT(2)));
+ DBG("HDCP_DEBUG_CTRL=0x%08x",
+ hdmi_read(hdmi, REG_HDMI_HDCP_DEBUG_CTRL));
+
+ /*
+ * Ensure that all register writes are completed before
+ * enabling HDCP cipher
+ */
+ wmb();
+
+ /*
+ * Enable HDCP
+ * This needs to be done as early as possible in order for the
+ * hardware to make An available to read
+ */
+ hdmi_write(hdmi, REG_HDMI_HDCP_CTRL, BIT(0));
+
+ /*
+ * If we had stale values for the An ready bit, it should most
+ * likely be cleared now after enabling HDCP cipher
+ */
+ link0_status = hdmi_read(hdmi, REG_HDMI_HDCP_LINK0_STATUS);
+ DBG("After enabling HDCP Link0_Status=0x%08x", link0_status);
+ if (!(link0_status & (BIT(8) | BIT(9))))
+ DBG("An not ready after enabling HDCP");
+
+ /* Clear any DDC failures from previous tries before enable HDCP*/
+ reset_hdcp_ddc_failures(hdcp_ctrl);
+
+ DBG("Queuing work to start HDCP authentication");
+ hdcp_ctrl->work_retry_cnt = AUTH_WORK_RETRIES_TIME;
+ queue_delayed_work(hdmi->workq,
+ &hdcp_ctrl->hdcp_auth_part1_1_work, HZ/2);
+}
+
+static void hdmi_hdcp_auth_fail(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ uint32_t regval;
+ unsigned long flags;
+
+ DBG("hdcp auth failed, queue reauth work");
+ /* clear HDMI Encrypt */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ regval = hdmi_read(hdmi, REG_HDMI_CTRL);
+ regval &= ~HDMI_CTRL_ENCRYPTED;
+ hdmi_write(hdmi, REG_HDMI_CTRL, regval);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+ queue_delayed_work(hdmi->workq, &hdcp_ctrl->hdcp_reauth_work, HZ/2);
+}
+
+static void hdmi_hdcp_auth_done(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ uint32_t regval;
+ unsigned long flags;
+
+ /*
+ * Disable software DDC before going into part3 to make sure
+ * there is no Arbitration between software and hardware for DDC
+ */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ regval = hdmi_read(hdmi, REG_HDMI_DDC_ARBITRATION);
+ regval |= HDMI_DDC_ARBITRATION_HW_ARBITRATION;
+ hdmi_write(hdmi, REG_HDMI_DDC_ARBITRATION, regval);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ /*
+ * Ensure that the state did not change during authentication.
+ * If it did, it means that deauthenticate/reauthenticate was
+ * called. In that case, this function doesn't need to enable encryption
+ */
+ mutex_lock(&hdcp_ctrl->state_mutex);
+ if (HDCP_STATE_AUTHENTICATING == hdcp_ctrl->hdcp_state) {
+ hdcp_ctrl->hdcp_state = HDCP_STATE_AUTHENTICATED;
+ hdcp_ctrl->auth_retries = 0;
+
+ /* enable HDMI Encrypt */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ regval = hdmi_read(hdmi, REG_HDMI_CTRL);
+ regval |= HDMI_CTRL_ENCRYPTED;
+ hdmi_write(hdmi, REG_HDMI_CTRL, regval);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+ mutex_unlock(&hdcp_ctrl->state_mutex);
+ } else {
+ mutex_unlock(&hdcp_ctrl->state_mutex);
+ DBG("HDCP state changed during authentication");
+ }
+}
+
+/*
+ * hdcp authenticating part 1: 1st
+ * Wait Key/An ready
+ * Read BCAPS from sink
+ * Write BCAPS and AKSV into HDCP engine
+ * Write An and AKSV to sink
+ * Read BKSV from sink and write into HDCP engine
+ */
+static int hdmi_hdcp_check_key_an_ready(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ uint32_t link0_status, an_ready, keys_state;
+
+ link0_status = hdmi_read(hdmi, REG_HDMI_HDCP_LINK0_STATUS);
+ /* Wait for HDCP keys to be checked and validated */
+ keys_state = (link0_status >> 28) & 0x7;
+ if (keys_state != HDCP_KEYS_STATE_VALID) {
+ DBG("Keys not ready(%d). s=%d, l0=%0x08x",
+ hdcp_ctrl->work_retry_cnt,
+ keys_state, link0_status);
+
+ return -EAGAIN;
+ }
+
+ /* Wait for An0 and An1 bit to be ready */
+ an_ready = (link0_status & BIT(8)) && (link0_status & BIT(9));
+ if (!an_ready) {
+ DBG("An not ready(%d). l0_status=0x%08x",
+ hdcp_ctrl->work_retry_cnt, link0_status);
+
+ return -EAGAIN;
+ }
+
+ return 0;
+}
+
+static int hdmi_hdcp_send_aksv_an(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc = 0;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ uint32_t link0_aksv_0, link0_aksv_1;
+ uint32_t link0_an_0, link0_an_1;
+ uint8_t aksv[5];
+ uint8_t an[8];
+
+ /* Read An0 and An1 */
+ link0_an_0 = hdmi_read(hdmi, REG_HDMI_HDCP_RCVPORT_DATA5);
+ link0_an_1 = hdmi_read(hdmi, REG_HDMI_HDCP_RCVPORT_DATA6);
+
+ /* Read AKSV */
+ link0_aksv_0 = hdmi_read(hdmi, REG_HDMI_HDCP_RCVPORT_DATA3);
+ link0_aksv_1 = hdmi_read(hdmi, REG_HDMI_HDCP_RCVPORT_DATA4);
+
+ DBG("Link ASKV=%08x%08x", link0_aksv_0, link0_aksv_1);
+ /* Copy An and AKSV to byte arrays for transmission */
+ aksv[0] = link0_aksv_0 & 0xFF;
+ aksv[1] = (link0_aksv_0 >> 8) & 0xFF;
+ aksv[2] = (link0_aksv_0 >> 16) & 0xFF;
+ aksv[3] = (link0_aksv_0 >> 24) & 0xFF;
+ aksv[4] = link0_aksv_1 & 0xFF;
+
+ an[0] = link0_an_0 & 0xFF;
+ an[1] = (link0_an_0 >> 8) & 0xFF;
+ an[2] = (link0_an_0 >> 16) & 0xFF;
+ an[3] = (link0_an_0 >> 24) & 0xFF;
+ an[4] = link0_an_1 & 0xFF;
+ an[5] = (link0_an_1 >> 8) & 0xFF;
+ an[6] = (link0_an_1 >> 16) & 0xFF;
+ an[7] = (link0_an_1 >> 24) & 0xFF;
+
+ /* Write An to offset 0x18 */
+ rc = hdmi_ddc_write(hdmi, HDCP_PORT_ADDR, 0x18, an, 8);
+ if (rc) {
+ pr_err("%s:An write failed\n", __func__);
+ return rc;
+ }
+ DBG("Link0-An=%08x%08x", link0_an_1, link0_an_0);
+
+ /* Write AKSV to offset 0x10 */
+ rc = hdmi_ddc_write(hdmi, HDCP_PORT_ADDR, 0x10, aksv, 5);
+ if (rc) {
+ pr_err("%s:AKSV write failed\n", __func__);
+ return rc;
+ }
+ DBG("Link0-AKSV=%02x%08x", link0_aksv_1 & 0xFF, link0_aksv_0);
+
+ return 0;
+}
+
+static int hdmi_hdcp_recv_bksv(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc = 0;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ uint32_t link0_bksv_0, link0_bksv_1;
+ uint8_t *bksv = NULL;
+ uint32_t reg[2], data[2];
+
+ bksv = hdcp_ctrl->bksv;
+
+ /* Read BKSV at offset 0x00 */
+ rc = hdmi_ddc_read(hdmi, HDCP_PORT_ADDR, 0x00, bksv, 5, true);
+ if (rc) {
+ pr_err("%s:BKSV read failed\n", __func__);
+ return rc;
+ }
+
+ /* check there are 20 ones in BKSV */
+ if (hdmi_hdcp_count_one(bksv, 5) != 20) {
+ pr_err(": BKSV doesn't have 20 1's and 20 0's\n");
+ pr_err(": BKSV chk fail. BKSV=%02x%02x%02x%02x%02x\n",
+ bksv[4], bksv[3], bksv[2], bksv[1], bksv[0]);
+ return -EINVAL;
+ }
+
+ link0_bksv_0 = bksv[3];
+ link0_bksv_0 = (link0_bksv_0 << 8) | bksv[2];
+ link0_bksv_0 = (link0_bksv_0 << 8) | bksv[1];
+ link0_bksv_0 = (link0_bksv_0 << 8) | bksv[0];
+ link0_bksv_1 = bksv[4];
+ DBG(":BKSV=%02x%08x", link0_bksv_1, link0_bksv_0);
+
+ /* Write BKSV read from sink to HDCP registers */
+ reg[0] = REG_HDMI_HDCP_RCVPORT_DATA0;
+ data[0] = link0_bksv_0;
+ reg[1] = REG_HDMI_HDCP_RCVPORT_DATA1;
+ data[1] = link0_bksv_1;
+ rc = hdmi_hdcp_scm_wr(hdcp_ctrl, reg, data, 2);
+
+ return rc;
+}
+
+static int hdmi_hdcp_recv_bcaps(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc = 0;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ uint32_t reg, data;
+ uint8_t bcaps;
+
+ rc = hdmi_ddc_read(hdmi, HDCP_PORT_ADDR, 0x40, &bcaps, 1, true);
+ if (rc) {
+ pr_err("%s:BCAPS read failed\n", __func__);
+ return rc;
+ }
+ DBG("BCAPS=%02x", bcaps);
+
+ /* receiver (0), repeater (1) */
+ hdcp_ctrl->ds_type = (bcaps & BIT(6)) ? DS_REPEATER : DS_RECEIVER;
+
+ /* Write BCAPS to the hardware */
+ reg = REG_HDMI_HDCP_RCVPORT_DATA12;
+ data = (uint32_t)bcaps;
+ rc = hdmi_hdcp_scm_wr(hdcp_ctrl, ®, &data, 1);
+
+ return rc;
+}
+
+static void hdmi_hdcp_auth_part1_1_work(struct work_struct *work)
+{
+ int rc = 0;
+ struct delayed_work *dw = to_delayed_work(work);
+ struct hdmi_hdcp_ctrl *hdcp_ctrl = container_of(dw,
+ struct hdmi_hdcp_ctrl, hdcp_auth_part1_1_work);
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ unsigned long flags;
+
+ if (HDCP_STATE_AUTHENTICATING != hdcp_ctrl->hdcp_state) {
+ pr_err("%s: invalid state. returning\n", __func__);
+ return;
+ }
+
+ hdcp_ctrl->work_retry_cnt--;
+
+ /*
+ * Wait for AKSV key and An ready
+ */
+ rc = hdmi_hdcp_check_key_an_ready(hdcp_ctrl);
+ if ((rc == -EAGAIN) && hdcp_ctrl->work_retry_cnt) {
+ queue_delayed_work(hdmi->workq,
+ &hdcp_ctrl->hdcp_auth_part1_1_work, HZ/50);
+ return;
+ } else if (rc) {
+ pr_err("%s: Key/An not ready, abort\n", __func__);
+ goto error;
+ }
+
+ /*
+ * Read BCAPS and send to HDCP engine
+ */
+ rc = hdmi_hdcp_recv_bcaps(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: read bcaps error, abort\n", __func__);
+ goto error;
+ }
+
+ /*
+ * 1.1_Features turned off by default.
+ * No need to write AInfo since 1.1_Features is disabled.
+ */
+ hdmi_write(hdmi, REG_HDMI_HDCP_RCVPORT_DATA4, 0);
+
+ /*
+ * Send AKSV and An to sink
+ */
+ rc = hdmi_hdcp_send_aksv_an(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s:An/Aksv write failed\n", __func__);
+ goto error;
+ }
+
+ /* Read BKSV and send to HDCP engine*/
+ rc = hdmi_hdcp_recv_bksv(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s:BKSV Process failed\n", __func__);
+ goto error;
+ }
+
+ /* Enable HDCP interrupts and ack/clear any stale interrupts */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ hdmi_write(hdmi, REG_HDMI_HDCP_INT_CTRL, 0xE6);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ /*
+ * HDCP Compliance Test case 1A-01:
+ * Wait here at least 100ms before reading R0'
+ */
+ hdcp_ctrl->work_retry_cnt = AUTH_WORK_RETRIES_TIME;
+ queue_delayed_work(hdmi->workq,
+ &hdcp_ctrl->hdcp_auth_part1_2_work, HZ/8);
+
+ return;
+error:
+ pr_err("%s: Authentication Part I failed %d\n", __func__, rc);
+ hdmi_hdcp_auth_fail(hdcp_ctrl);
+}
+
+/*
+ * hdcp authenticating part 1: 2nd
+ * read R0' from sink and pass it to HDCP engine
+ */
+static void hdmi_hdcp_auth_part1_2_work(struct work_struct *work)
+{
+ int rc = 0;
+ struct delayed_work *dw = to_delayed_work(work);
+ struct hdmi_hdcp_ctrl *hdcp_ctrl = container_of(dw,
+ struct hdmi_hdcp_ctrl, hdcp_auth_part1_2_work);
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ uint8_t buf[2];
+
+ if (HDCP_STATE_AUTHENTICATING != hdcp_ctrl->hdcp_state) {
+ pr_err("%s: invalid state. returning\n", __func__);
+ return;
+ }
+
+ /* Read R0' at offset 0x08 */
+ rc = hdmi_ddc_read(hdmi, HDCP_PORT_ADDR, 0x08, buf, 2, true);
+ if (rc) {
+ pr_err("%s:R0' read failed\n", __func__);
+ goto error;
+ }
+ DBG("R0'=%02x%02x", buf[1], buf[0]);
+
+ /* Write R0' to HDCP registers and check to see if it is a match */
+ hdmi_write(hdmi, REG_HDMI_HDCP_RCVPORT_DATA2_0,
+ (((uint32_t)buf[1]) << 8) | buf[0]);
+
+ return;
+error:
+ pr_err("%s: Authentication Part I:2 failed %d\n", __func__, rc);
+ hdmi_hdcp_auth_fail(hdcp_ctrl);
+}
+
+/*
+ * hdcp authenticating part 1: 3rd
+ * Wait for authenticating result: R0/R0' are matched or not
+ */
+static void hdmi_hdcp_auth_part1_3_work(struct work_struct *work)
+{
+ struct hdmi_hdcp_ctrl *hdcp_ctrl = container_of(work,
+ struct hdmi_hdcp_ctrl, hdcp_auth_part1_3_work);
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ bool is_match;
+ uint32_t link0_status;
+
+ if (HDCP_STATE_AUTHENTICATING != hdcp_ctrl->hdcp_state) {
+ pr_err("%s: invalid state. returning\n", __func__);
+ return;
+ }
+
+ link0_status = hdmi_read(hdmi, REG_HDMI_HDCP_LINK0_STATUS);
+ is_match = link0_status & BIT(12);
+ if (!is_match) {
+ pr_err("%s: Authentication Part I failed\n", __func__);
+ hdmi_hdcp_auth_fail(hdcp_ctrl);
+ } else {
+ /* Enable HDCP Encryption */
+ hdmi_write(hdmi, REG_HDMI_HDCP_CTRL, BIT(0) | BIT(8));
+ DBG("Authentication Part I successful");
+ if (hdcp_ctrl->ds_type == DS_REPEATER) {
+ /* queue HDCP PartII work */
+ hdcp_ctrl->work_retry_cnt = AUTH_WORK_RETRIES_TIME;
+ queue_delayed_work(hdmi->workq,
+ &hdcp_ctrl->hdcp_auth_part2_1_work, 0);
+ } else {
+ hdmi_hdcp_auth_done(hdcp_ctrl);
+ }
+ }
+}
+
+/*
+ * hdcp authenticating part 2: 1st
+ * wait until sink (repeater)'s ksv fifo ready
+ * read bstatus from sink and write to HDCP engine
+ */
+static int hdmi_hdcp_recv_bstatus(struct hdmi_hdcp_ctrl *hdcp_ctrl,
+ uint8_t bcaps)
+{
+ int rc;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ uint16_t bstatus;
+ bool max_devs_exceeded = false, max_cascade_exceeded = false;
+ uint32_t repeater_cascade_depth = 0, down_stream_devices = 0;
+ uint32_t reg, data;
+ uint8_t buf[2];
+
+ memset(buf, 0, sizeof(buf));
+
+ /* Read BSTATUS at offset 0x41 */
+ rc = hdmi_ddc_read(hdmi, HDCP_PORT_ADDR, 0x41, buf, 2, false);
+ if (rc) {
+ pr_err("%s: BSTATUS read failed\n", __func__);
+ goto error;
+ }
+ bstatus = buf[1];
+ bstatus = (bstatus << 8) | buf[0];
+
+ /* Write BSTATUS and BCAPS to HDCP registers */
+ reg = REG_HDMI_HDCP_RCVPORT_DATA12;
+ data = bcaps | (bstatus << 8);
+ rc = hdmi_hdcp_scm_wr(hdcp_ctrl, ®, &data, 1);
+ if (rc) {
+ pr_err("%s: BSTATUS write failed\n", __func__);
+ goto error;
+ }
+
+ down_stream_devices = bstatus & 0x7F;
+ repeater_cascade_depth = (bstatus >> 8) & 0x7;
+ max_devs_exceeded = (bstatus & BIT(7)) ? true : false;
+ max_cascade_exceeded = (bstatus & BIT(11)) ? true : false;
+
+ if (down_stream_devices == 0) {
+ /*
+ * If no downstream devices are attached to the repeater
+ * then part II fails.
+ * todo: The other approach would be to continue PART II.
+ */
+ pr_err("%s: No downstream devices\n", __func__);
+ rc = -EINVAL;
+ goto error;
+ }
+
+ /*
+ * HDCP Compliance 1B-05:
+ * Check if no. of devices connected to repeater
+ * exceed max_devices_connected from bit 7 of Bstatus.
+ */
+ if (max_devs_exceeded) {
+ pr_err("%s: no. of devs connected exceeds max allowed",
+ __func__);
+ rc = -EINVAL;
+ goto error;
+ }
+
+ /*
+ * HDCP Compliance 1B-06:
+ * Check if no. of cascade connected to repeater
+ * exceed max_cascade_connected from bit 11 of Bstatus.
+ */
+ if (max_cascade_exceeded) {
+ pr_err("%s: no. of cascade conn exceeds max allowed",
+ __func__);
+ rc = -EINVAL;
+ goto error;
+ }
+
+error:
+ hdcp_ctrl->dev_count = down_stream_devices;
+ hdcp_ctrl->max_cascade_exceeded = max_cascade_exceeded;
+ hdcp_ctrl->max_dev_exceeded = max_devs_exceeded;
+ hdcp_ctrl->depth = repeater_cascade_depth;
+ return rc;
+}
+
+static void hdmi_hdcp_auth_part2_1_work(struct work_struct *work)
+{
+ int rc;
+ struct delayed_work *dw = to_delayed_work(work);
+ struct hdmi_hdcp_ctrl *hdcp_ctrl = container_of(dw,
+ struct hdmi_hdcp_ctrl, hdcp_auth_part2_1_work);
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ uint8_t bcaps;
+
+ if (HDCP_STATE_AUTHENTICATING != hdcp_ctrl->hdcp_state) {
+ pr_err("%s: invalid state. returning", __func__);
+ return;
+ }
+
+ hdcp_ctrl->work_retry_cnt--;
+
+ /*
+ * Wait until READY bit is set in BCAPS, as per HDCP specifications
+ * maximum permitted time to check for READY bit is five seconds.
+ */
+ /* Read BCAPS at offset 0x40 */
+ rc = hdmi_ddc_read(hdmi, HDCP_PORT_ADDR, 0x40, &bcaps, 1, false);
+ if (rc) {
+ pr_err("%s: BCAPS read failed\n", __func__);
+ goto error;
+ }
+
+ if (!(bcaps & BIT(5))) {
+ if (hdcp_ctrl->work_retry_cnt) {
+ DBG("ksv fifo (%d) is not ready",
+ hdcp_ctrl->work_retry_cnt);
+ queue_delayed_work(hdmi->workq,
+ &hdcp_ctrl->hdcp_auth_part2_1_work, HZ/20);
+ return;
+ } else {
+ pr_err("%s: timeout to wait ksv ready\n",
+ __func__);
+ rc = -ETIMEDOUT;
+ goto error;
+ }
+ }
+
+ rc = hdmi_hdcp_recv_bstatus(hdcp_ctrl, bcaps);
+ if (rc) {
+ pr_err("%s: bstatus error\n", __func__);
+ goto error;
+ }
+
+ hdcp_ctrl->work_retry_cnt = AUTH_WORK_RETRIES_TIME;
+ queue_delayed_work(hdmi->workq,
+ &hdcp_ctrl->hdcp_auth_part2_2_work, 0);
+
+ return;
+error:
+ pr_err("%s: Authentication Part II failed %d\n", __func__, rc);
+ hdmi_hdcp_auth_fail(hdcp_ctrl);
+}
+
+/*
+ * hdcp authenticating part 2: 2nd
+ * read ksv fifo from sink
+ * transfer V' from sink to HDCP engine
+ * reset SHA engine
+ */
+int hdmi_hdcp_read_v(struct hdmi *hdmi, char *name,
+ uint32_t off, uint32_t *val)
+{
+ int rc = 0;
+ uint8_t buf[4];
+
+ rc = hdmi_ddc_read(hdmi, HDCP_PORT_ADDR, off, buf, 4, true);
+ if (rc) {
+ pr_err("%s: Read %s failed\n", __func__,
+ name);
+ return rc;
+ }
+
+ if (val)
+ *val = (buf[3] << 24 | buf[2] << 16 | buf[1] << 8 | buf[0]);
+
+ DBG("%s: buf[0]=%x, buf[1]=%x, buf[2]=%x, buf[3]=%x", name,
+ buf[0], buf[1], buf[2], buf[3]);
+
+ return rc;
+}
+
+static int hdmi_hdcp_transfer_v_h(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ int rc = 0;
+ struct hdmi_hdcp_reg_data reg_data[] = {
+ {REG_HDMI_HDCP_RCVPORT_DATA7, 0x20, "V' H0"},
+ {REG_HDMI_HDCP_RCVPORT_DATA8, 0x24, "V' H1"},
+ {REG_HDMI_HDCP_RCVPORT_DATA9, 0x28, "V' H2"},
+ {REG_HDMI_HDCP_RCVPORT_DATA10, 0x2C, "V' H3"},
+ {REG_HDMI_HDCP_RCVPORT_DATA11, 0x30, "V' H4"},
+ };
+ struct hdmi_hdcp_reg_data *rd;
+ uint32_t size = ARRAY_SIZE(reg_data);
+ uint32_t reg[ARRAY_SIZE(reg_data)], data[ARRAY_SIZE(reg_data)];
+ int i;
+
+ for (i = 0; i < size; i++) {
+ rd = ®_data[i];
+ rc = hdmi_hdcp_read_v(hdmi, rd->name,
+ rd->off, &data[i]);
+ if (rc)
+ goto error;
+
+ reg[i] = reg_data[i].reg_id;
+ }
+
+ rc = hdmi_hdcp_scm_wr(hdcp_ctrl, reg, data, size);
+
+error:
+ return rc;
+}
+
+static int hdmi_hdcp_recv_ksv_fifo(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int rc;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ uint8_t *ksv_fifo = NULL;
+ uint32_t ksv_bytes;
+
+ ksv_fifo = hdcp_ctrl->ksv_list;
+ ksv_bytes = 5 * hdcp_ctrl->dev_count;
+ memset(ksv_fifo, 0,
+ sizeof(hdcp_ctrl->ksv_list));
+
+ rc = hdmi_ddc_read(hdmi, HDCP_PORT_ADDR, 0x43,
+ ksv_fifo, ksv_bytes, true);
+ if (rc)
+ pr_err("%s: KSV FIFO read failed\n", __func__);
+
+ return rc;
+}
+
+static int hdmi_hdcp_reset_sha_engine(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ uint32_t reg[2], data[2];
+ uint32_t rc = 0;
+
+ reg[0] = REG_HDMI_HDCP_SHA_CTRL;
+ data[0] = HDCP_REG_ENABLE;
+ reg[1] = REG_HDMI_HDCP_SHA_CTRL;
+ data[1] = HDCP_REG_DISABLE;
+
+ rc = hdmi_hdcp_scm_wr(hdcp_ctrl, reg, data, 2);
+
+ return rc;
+}
+
+static void hdmi_hdcp_auth_part2_2_work(struct work_struct *work)
+{
+ int rc;
+ struct delayed_work *dw = to_delayed_work(work);
+ struct hdmi_hdcp_ctrl *hdcp_ctrl = container_of(dw,
+ struct hdmi_hdcp_ctrl, hdcp_auth_part2_2_work);
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+
+ if (HDCP_STATE_AUTHENTICATING != hdcp_ctrl->hdcp_state) {
+ DBG("invalid state. returning");
+ return;
+ }
+
+ hdcp_ctrl->work_retry_cnt--;
+
+ /*
+ * Read KSV FIFO over DDC
+ * Key Selection vector FIFO Used to pull downstream KSVs
+ * from HDCP Repeaters.
+ * All bytes (DEVICE_COUNT * 5) must be read in a single,
+ * auto incrementing access.
+ * All bytes read as 0x00 for HDCP Receivers that are not
+ * HDCP Repeaters (REPEATER == 0).
+ */
+ rc = hdmi_hdcp_recv_ksv_fifo(hdcp_ctrl);
+ if (rc && hdcp_ctrl->work_retry_cnt) {
+ /*
+ * HDCP Compliance Test case 1B-01:
+ * Wait until all the ksv bytes have been
+ * read from the KSV FIFO register.
+ */
+ queue_delayed_work(hdmi->workq,
+ &hdcp_ctrl->hdcp_auth_part2_2_work, HZ/40);
+ return;
+ } else if (rc) {
+ pr_err("%s: error to recv ksv fifo\n", __func__);
+ goto error;
+ }
+
+ rc = hdmi_hdcp_transfer_v_h(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: transfer V failed\n", __func__);
+ goto error;
+ }
+
+ /* reset SHA engine before write ksv fifo */
+ rc = hdmi_hdcp_reset_sha_engine(hdcp_ctrl);
+ if (rc) {
+ pr_err("%s: fail to reset sha engine\n", __func__);
+ goto error;
+ }
+
+ hdcp_ctrl->work_retry_cnt = AUTH_WORK_RETRIES_TIME;
+ hdcp_ctrl->ksv_fifo_w_index = 0;
+ queue_delayed_work(hdmi->workq,
+ &hdcp_ctrl->hdcp_auth_part2_3_work, 0);
+
+ return;
+error:
+ pr_err("%s: Authentication Part II failed\n", __func__);
+ hdmi_hdcp_auth_fail(hdcp_ctrl);
+}
+
+/*
+ * Write KSV FIFO to HDCP_SHA_DATA.
+ * This is done 1 byte at time starting with the LSB.
+ * Once 64 bytes have been written, we need to poll for
+ * HDCP_SHA_BLOCK_DONE before writing any further
+ * If the last byte is written, we need to poll for
+ * HDCP_SHA_COMP_DONE to wait until HW finish
+ */
+static int hdmi_hdcp_write_ksv_fifo(struct hdmi_hdcp_ctrl *hdcp_ctrl)
+{
+ int i;
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ uint32_t ksv_bytes, last_byte = 0;
+ uint8_t *ksv_fifo = NULL;
+ uint32_t reg_val, data, reg;
+ uint32_t rc = 0;
+
+ ksv_bytes = 5 * hdcp_ctrl->dev_count;
+
+ /* Check if need to wait for HW completion */
+ if (hdcp_ctrl->ksv_fifo_w_index) {
+ reg_val = hdmi_read(hdmi, REG_HDMI_HDCP_SHA_STATUS);
+ DBG("HDCP_SHA_STATUS=%08x", reg_val);
+ if (hdcp_ctrl->ksv_fifo_w_index == ksv_bytes) {
+ /* check COMP_DONE if last write */
+ if (reg_val & BIT(4)) {
+ DBG("COMP_DONE");
+ return 0;
+ } else {
+ return -EAGAIN;
+ }
+ } else {
+ /* check BLOCK_DONE if not last write */
+ if (!(reg_val & BIT(0)))
+ return -EAGAIN;
+ else
+ DBG("BLOCK_DONE");
+ }
+ }
+
+ ksv_bytes -= hdcp_ctrl->ksv_fifo_w_index;
+ if (ksv_bytes <= 64)
+ last_byte = 1;
+ else
+ ksv_bytes = 64;
+
+ ksv_fifo = hdcp_ctrl->ksv_list;
+ ksv_fifo += hdcp_ctrl->ksv_fifo_w_index;
+
+ for (i = 0; i < ksv_bytes; i++) {
+ /* Write KSV byte and set DONE bit[0] for last byte*/
+ reg_val = ksv_fifo[i] << 16;
+ if ((i == (ksv_bytes - 1)) && last_byte)
+ reg_val |= BIT(0);
+
+ reg = REG_HDMI_HDCP_SHA_DATA;
+ data = reg_val;
+ rc = hdmi_hdcp_scm_wr(hdcp_ctrl, ®, &data, 1);
+
+ if (rc)
+ return rc;
+ }
+
+ hdcp_ctrl->ksv_fifo_w_index += ksv_bytes;
+
+ /*
+ *return -EAGAIN to notify caller to wait for COMP_DONE or BLOCK_DONE
+ */
+ return -EAGAIN;
+}
+
+/*
+ * hdcp authenticating part 2: 3rd
+ * write ksv fifo into HDCP engine
+ */
+static void hdmi_hdcp_auth_part2_3_work(struct work_struct *work)
+{
+ int rc;
+ struct delayed_work *dw = to_delayed_work(work);
+ struct hdmi_hdcp_ctrl *hdcp_ctrl = container_of(dw,
+ struct hdmi_hdcp_ctrl, hdcp_auth_part2_3_work);
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+
+ if (HDCP_STATE_AUTHENTICATING != hdcp_ctrl->hdcp_state) {
+ DBG("invalid state. returning");
+ return;
+ }
+
+ hdcp_ctrl->work_retry_cnt--;
+
+ rc = hdmi_hdcp_write_ksv_fifo(hdcp_ctrl);
+ if ((rc == -EAGAIN) && hdcp_ctrl->work_retry_cnt) {
+ queue_delayed_work(hdmi->workq,
+ &hdcp_ctrl->hdcp_auth_part2_3_work, HZ/50);
+ return;
+ } else if (rc) {
+ pr_err("%s: error write ksv fifo\n", __func__);
+ goto error;
+ }
+
+ hdcp_ctrl->work_retry_cnt = AUTH_WORK_RETRIES_TIME;
+ queue_delayed_work(hdmi->workq,
+ &hdcp_ctrl->hdcp_auth_part2_4_work, HZ/50);
+
+ return;
+error:
+ pr_err("%s: Authentication Part II failed\n", __func__);
+ hdmi_hdcp_auth_fail(hdcp_ctrl);
+} /* hdmi_hdcp_authentication_part2 */
+
+/*
+ * hdcp authenticating part 2: 4th
+ * Wait for V_MATCHES
+ */
+static void hdmi_hdcp_auth_part2_4_work(struct work_struct *work)
+{
+ int rc = 0;
+ struct delayed_work *dw = to_delayed_work(work);
+ struct hdmi_hdcp_ctrl *hdcp_ctrl = container_of(dw,
+ struct hdmi_hdcp_ctrl, hdcp_auth_part2_4_work);
+ struct hdmi *hdmi = hdcp_ctrl->hdmi;
+ uint32_t link0_status;
+
+ if (HDCP_STATE_AUTHENTICATING != hdcp_ctrl->hdcp_state) {
+ DBG("invalid state. returning");
+ return;
+ }
+
+ hdcp_ctrl->work_retry_cnt--;
+
+ link0_status = hdmi_read(hdmi, REG_HDMI_HDCP_LINK0_STATUS);
+ if (!(link0_status & BIT(20))) {
+ if (hdcp_ctrl->work_retry_cnt) {
+ queue_delayed_work(hdmi->workq,
+ &hdcp_ctrl->hdcp_auth_part2_4_work, HZ/50);
+ return;
+ } else {
+ rc = -ETIMEDOUT;
+ pr_err("%s: HDCP V Match timedout", __func__);
+ }
+ }
+
+ if (rc) {
+ pr_err("%s: Authentication Part II failed\n", __func__);
+ hdmi_hdcp_auth_fail(hdcp_ctrl);
+ } else {
+ pr_info("%s: Authentication Part II successful\n",
+ __func__);
+ hdmi_hdcp_auth_done(hdcp_ctrl);
+ }
+}
+
+int hdmi_hdcp_on(struct hdmi *hdmi)
+{
+ struct hdmi_hdcp_ctrl *hdcp_ctrl = hdmi->hdcp_ctrl;
+ uint32_t regval;
+ unsigned long flags;
+
+ if (!hdcp_ctrl) {
+ pr_warn("%s:hdcp_ctrl is NULL\n", __func__);
+ return 0;
+ }
+
+ if (HDCP_STATE_INACTIVE != hdcp_ctrl->hdcp_state) {
+ DBG("still active or activating. returning");
+ return 0;
+ }
+
+ /* clear HDMI Encrypt */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ regval = hdmi_read(hdmi, REG_HDMI_CTRL);
+ regval &= ~HDMI_CTRL_ENCRYPTED;
+ hdmi_write(hdmi, REG_HDMI_CTRL, regval);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ mutex_lock(&hdcp_ctrl->state_mutex);
+ hdcp_ctrl->hdcp_state = HDCP_STATE_AUTHENTICATING;
+ mutex_unlock(&hdcp_ctrl->state_mutex);
+ hdcp_ctrl->auth_retries = 0;
+ queue_work(hdmi->workq, &hdcp_ctrl->hdcp_auth_prepare_work);
+
+ return 0;
+}
+
+void hdmi_hdcp_off(struct hdmi *hdmi)
+{
+ struct hdmi_hdcp_ctrl *hdcp_ctrl = hdmi->hdcp_ctrl;
+ unsigned long flags;
+ uint32_t regval;
+ int rc = 0;
+
+ if (!hdcp_ctrl) {
+ pr_err("%s:hdcp_ctrl is NULL\n", __func__);
+ return;
+ }
+
+ if (HDCP_STATE_INACTIVE == hdcp_ctrl->hdcp_state) {
+ DBG("hdcp inactive. returning");
+ return;
+ }
+
+ /*
+ * Disable HPD circuitry.
+ * This is needed to reset the HDCP cipher engine so that when we
+ * attempt a re-authentication, HW would clear the AN0_READY and
+ * AN1_READY bits in HDMI_HDCP_LINK0_STATUS register
+ */
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
+ hdmi_read(hdmi, REG_HDMI_HPD_CTRL) & ~BIT(28));
+
+ /*
+ * Disable HDCP interrupts.
+ * Also, need to set the state to inactive here so that any ongoing
+ * reauth works will know that the HDCP session has been turned off.
+ */
+ hdmi_write(hdmi, REG_HDMI_HDCP_INT_CTRL, 0);
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ /*
+ * Cancel any pending auth/reauth attempts.
+ * If one is ongoing, this will wait for it to finish.
+ * No more reauthentication attempts will be scheduled since we
+ * set the current state to inactive.
+ */
+ rc = cancel_work_sync(&hdcp_ctrl->hdcp_auth_prepare_work);
+ if (rc)
+ DBG("Deleted hdcp auth prepare work");
+ rc = cancel_delayed_work_sync(&hdcp_ctrl->hdcp_reauth_work);
+ if (rc)
+ DBG("Deleted hdcp reauth work");
+ rc = cancel_delayed_work_sync(&hdcp_ctrl->hdcp_auth_part1_1_work);
+ if (rc)
+ DBG("Deleted hdcp auth part1_1 work");
+ rc = cancel_delayed_work_sync(&hdcp_ctrl->hdcp_auth_part1_2_work);
+ if (rc)
+ DBG("Deleted hdcp auth part1_2 work");
+ rc = cancel_work_sync(&hdcp_ctrl->hdcp_auth_part1_3_work);
+ if (rc)
+ DBG("Deleted hdcp auth part1_3 work");
+ rc = cancel_delayed_work_sync(&hdcp_ctrl->hdcp_auth_part2_1_work);
+ if (rc)
+ DBG("Deleted hdcp auth part2_1 work");
+ rc = cancel_delayed_work_sync(&hdcp_ctrl->hdcp_auth_part2_2_work);
+ if (rc)
+ DBG("Deleted hdcp auth part2_2 work");
+ rc = cancel_delayed_work_sync(&hdcp_ctrl->hdcp_auth_part2_3_work);
+ if (rc)
+ DBG("Deleted hdcp auth part2_3 work");
+ rc = cancel_delayed_work_sync(&hdcp_ctrl->hdcp_auth_part2_4_work);
+ if (rc)
+ DBG("Deleted hdcp auth part2_4 work");
+
+ /* set state to inactive after all work cancelled */
+ mutex_lock(&hdcp_ctrl->state_mutex);
+ hdcp_ctrl->hdcp_state = HDCP_STATE_INACTIVE;
+ mutex_unlock(&hdcp_ctrl->state_mutex);
+
+ hdmi_write(hdmi, REG_HDMI_HDCP_RESET, BIT(0));
+
+ /* Disable encryption and disable the HDCP block */
+ hdmi_write(hdmi, REG_HDMI_HDCP_CTRL, 0);
+
+ spin_lock_irqsave(&hdmi->reg_lock, flags);
+ regval = hdmi_read(hdmi, REG_HDMI_CTRL);
+ regval &= ~HDMI_CTRL_ENCRYPTED;
+ hdmi_write(hdmi, REG_HDMI_CTRL, regval);
+
+ /* Enable HPD circuitry */
+ hdmi_write(hdmi, REG_HDMI_HPD_CTRL,
+ hdmi_read(hdmi, REG_HDMI_HPD_CTRL) | BIT(28));
+ spin_unlock_irqrestore(&hdmi->reg_lock, flags);
+
+ DBG("HDCP: Off");
+} /* hdmi_hdcp_off */
+
+struct hdmi_hdcp_ctrl *hdmi_hdcp_init(struct hdmi *hdmi)
+{
+ uint32_t scm_buf = TZ_HDCP_CMD_ID;
+ struct hdmi_hdcp_ctrl *hdcp_ctrl;
+ uint32_t ret = 0;
+ uint32_t resp = 0;
+
+ if (!hdmi->qfprom_mmio) {
+ pr_err("%s: HDCP is not supported without qfprom\n",
+ __func__);
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ hdcp_ctrl = kzalloc(sizeof(*hdcp_ctrl), GFP_KERNEL);
+ if (!hdcp_ctrl) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ INIT_WORK(&hdcp_ctrl->hdcp_auth_prepare_work,
+ hdmi_hdcp_auth_prepare_work);
+ INIT_DELAYED_WORK(&hdcp_ctrl->hdcp_reauth_work, hdmi_hdcp_reauth_work);
+ INIT_DELAYED_WORK(&hdcp_ctrl->hdcp_auth_part1_1_work,
+ hdmi_hdcp_auth_part1_1_work);
+ INIT_DELAYED_WORK(&hdcp_ctrl->hdcp_auth_part1_2_work,
+ hdmi_hdcp_auth_part1_2_work);
+ INIT_WORK(&hdcp_ctrl->hdcp_auth_part1_3_work,
+ hdmi_hdcp_auth_part1_3_work);
+ INIT_DELAYED_WORK(&hdcp_ctrl->hdcp_auth_part2_1_work,
+ hdmi_hdcp_auth_part2_1_work);
+ INIT_DELAYED_WORK(&hdcp_ctrl->hdcp_auth_part2_2_work,
+ hdmi_hdcp_auth_part2_2_work);
+ INIT_DELAYED_WORK(&hdcp_ctrl->hdcp_auth_part2_3_work,
+ hdmi_hdcp_auth_part2_3_work);
+ INIT_DELAYED_WORK(&hdcp_ctrl->hdcp_auth_part2_4_work,
+ hdmi_hdcp_auth_part2_4_work);
+
+ hdcp_ctrl->hdmi = hdmi;
+ hdcp_ctrl->hdcp_state = HDCP_STATE_INACTIVE;
+ mutex_init(&hdcp_ctrl->state_mutex);
+ hdcp_ctrl->aksv_valid = false;
+
+ ret = scm_call(SCM_SVC_INFO, SCM_CMD_HDCP, &scm_buf,
+ sizeof(scm_buf), &resp, sizeof(resp));
+ if (ret) {
+ pr_err("%s: error: scm_call ret = %d, resp = %d\n",
+ __func__, ret, resp);
+ goto fail;
+ } else {
+ DBG("tz_hdcp = %d", resp);
+ hdcp_ctrl->tz_hdcp = resp;
+ }
+
+ return hdcp_ctrl;
+fail:
+ kfree(hdcp_ctrl);
+ return ERR_PTR(ret);
+} /* hdmi_hdcp_init */
+
+void hdmi_hdcp_destroy(struct hdmi *hdmi)
+{
+ if (hdmi && hdmi->hdcp_ctrl) {
+ kfree(hdmi->hdcp_ctrl);
+ hdmi->hdcp_ctrl = NULL;
+ }
+}
--
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a Linux Foundation Collaborative Project
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