blob: 010657ea7af7822c9f5c1f497ab685067c106f7c [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2018, The Linux Foundation. All rights reserved.
* Copyright (c) 2019-2020. Linaro Limited.
*/
#include <linux/firmware.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <sound/hdmi-codec.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#define EDID_BLOCK_SIZE 128
#define EDID_NUM_BLOCKS 2
struct lt9611uxc {
struct device *dev;
struct drm_bridge bridge;
struct drm_connector connector;
struct regmap *regmap;
/* Protects all accesses to registers by stopping the on-chip MCU */
struct mutex ocm_lock;
struct wait_queue_head wq;
struct work_struct work;
struct device_node *dsi0_node;
struct device_node *dsi1_node;
struct mipi_dsi_device *dsi0;
struct mipi_dsi_device *dsi1;
struct platform_device *audio_pdev;
struct gpio_desc *reset_gpio;
struct gpio_desc *enable_gpio;
struct regulator_bulk_data supplies[2];
struct i2c_client *client;
bool hpd_supported;
bool edid_read;
/* can be accessed from different threads, so protect this with ocm_lock */
bool hdmi_connected;
uint8_t fw_version;
};
#define LT9611_PAGE_CONTROL 0xff
static const struct regmap_range_cfg lt9611uxc_ranges[] = {
{
.name = "register_range",
.range_min = 0,
.range_max = 0xd0ff,
.selector_reg = LT9611_PAGE_CONTROL,
.selector_mask = 0xff,
.selector_shift = 0,
.window_start = 0,
.window_len = 0x100,
},
};
static const struct regmap_config lt9611uxc_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xffff,
.ranges = lt9611uxc_ranges,
.num_ranges = ARRAY_SIZE(lt9611uxc_ranges),
};
struct lt9611uxc_mode {
u16 hdisplay;
u16 vdisplay;
u8 vrefresh;
};
/*
* This chip supports only a fixed set of modes.
* Enumerate them here to check whether the mode is supported.
*/
static struct lt9611uxc_mode lt9611uxc_modes[] = {
{ 1920, 1080, 60 },
{ 1920, 1080, 30 },
{ 1920, 1080, 25 },
{ 1366, 768, 60 },
{ 1360, 768, 60 },
{ 1280, 1024, 60 },
{ 1280, 800, 60 },
{ 1280, 720, 60 },
{ 1280, 720, 50 },
{ 1280, 720, 30 },
{ 1152, 864, 60 },
{ 1024, 768, 60 },
{ 800, 600, 60 },
{ 720, 576, 50 },
{ 720, 480, 60 },
{ 640, 480, 60 },
};
static struct lt9611uxc *bridge_to_lt9611uxc(struct drm_bridge *bridge)
{
return container_of(bridge, struct lt9611uxc, bridge);
}
static struct lt9611uxc *connector_to_lt9611uxc(struct drm_connector *connector)
{
return container_of(connector, struct lt9611uxc, connector);
}
static void lt9611uxc_lock(struct lt9611uxc *lt9611uxc)
{
mutex_lock(&lt9611uxc->ocm_lock);
regmap_write(lt9611uxc->regmap, 0x80ee, 0x01);
}
static void lt9611uxc_unlock(struct lt9611uxc *lt9611uxc)
{
regmap_write(lt9611uxc->regmap, 0x80ee, 0x00);
msleep(50);
mutex_unlock(&lt9611uxc->ocm_lock);
}
static irqreturn_t lt9611uxc_irq_thread_handler(int irq, void *dev_id)
{
struct lt9611uxc *lt9611uxc = dev_id;
unsigned int irq_status = 0;
unsigned int hpd_status = 0;
lt9611uxc_lock(lt9611uxc);
regmap_read(lt9611uxc->regmap, 0xb022, &irq_status);
regmap_read(lt9611uxc->regmap, 0xb023, &hpd_status);
if (irq_status)
regmap_write(lt9611uxc->regmap, 0xb022, 0);
if (irq_status & BIT(0)) {
lt9611uxc->edid_read = !!(hpd_status & BIT(0));
wake_up_all(&lt9611uxc->wq);
}
if (irq_status & BIT(1)) {
lt9611uxc->hdmi_connected = hpd_status & BIT(1);
schedule_work(&lt9611uxc->work);
}
lt9611uxc_unlock(lt9611uxc);
return IRQ_HANDLED;
}
static void lt9611uxc_hpd_work(struct work_struct *work)
{
struct lt9611uxc *lt9611uxc = container_of(work, struct lt9611uxc, work);
bool connected;
if (lt9611uxc->connector.dev) {
if (lt9611uxc->connector.dev->mode_config.funcs)
drm_kms_helper_hotplug_event(lt9611uxc->connector.dev);
} else {
mutex_lock(&lt9611uxc->ocm_lock);
connected = lt9611uxc->hdmi_connected;
mutex_unlock(&lt9611uxc->ocm_lock);
drm_bridge_hpd_notify(&lt9611uxc->bridge,
connected ?
connector_status_connected :
connector_status_disconnected);
}
}
static void lt9611uxc_reset(struct lt9611uxc *lt9611uxc)
{
gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1);
msleep(20);
gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 0);
msleep(20);
gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1);
msleep(300);
}
static void lt9611uxc_assert_5v(struct lt9611uxc *lt9611uxc)
{
if (!lt9611uxc->enable_gpio)
return;
gpiod_set_value_cansleep(lt9611uxc->enable_gpio, 1);
msleep(20);
}
static int lt9611uxc_regulator_init(struct lt9611uxc *lt9611uxc)
{
int ret;
lt9611uxc->supplies[0].supply = "vdd";
lt9611uxc->supplies[1].supply = "vcc";
ret = devm_regulator_bulk_get(lt9611uxc->dev, 2, lt9611uxc->supplies);
if (ret < 0)
return ret;
return regulator_set_load(lt9611uxc->supplies[0].consumer, 200000);
}
static int lt9611uxc_regulator_enable(struct lt9611uxc *lt9611uxc)
{
int ret;
ret = regulator_enable(lt9611uxc->supplies[0].consumer);
if (ret < 0)
return ret;
usleep_range(1000, 10000); /* 50000 according to dtsi */
ret = regulator_enable(lt9611uxc->supplies[1].consumer);
if (ret < 0) {
regulator_disable(lt9611uxc->supplies[0].consumer);
return ret;
}
return 0;
}
static struct lt9611uxc_mode *lt9611uxc_find_mode(const struct drm_display_mode *mode)
{
int i;
for (i = 0; i < ARRAY_SIZE(lt9611uxc_modes); i++) {
if (lt9611uxc_modes[i].hdisplay == mode->hdisplay &&
lt9611uxc_modes[i].vdisplay == mode->vdisplay &&
lt9611uxc_modes[i].vrefresh == drm_mode_vrefresh(mode)) {
return &lt9611uxc_modes[i];
}
}
return NULL;
}
static struct mipi_dsi_device *lt9611uxc_attach_dsi(struct lt9611uxc *lt9611uxc,
struct device_node *dsi_node)
{
const struct mipi_dsi_device_info info = { "lt9611uxc", 0, NULL };
struct mipi_dsi_device *dsi;
struct mipi_dsi_host *host;
int ret;
host = of_find_mipi_dsi_host_by_node(dsi_node);
if (!host) {
dev_err(lt9611uxc->dev, "failed to find dsi host\n");
return ERR_PTR(-EPROBE_DEFER);
}
dsi = mipi_dsi_device_register_full(host, &info);
if (IS_ERR(dsi)) {
dev_err(lt9611uxc->dev, "failed to create dsi device\n");
return dsi;
}
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
MIPI_DSI_MODE_VIDEO_HSE;
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
dev_err(lt9611uxc->dev, "failed to attach dsi to host\n");
mipi_dsi_device_unregister(dsi);
return ERR_PTR(ret);
}
return dsi;
}
static int lt9611uxc_connector_get_modes(struct drm_connector *connector)
{
struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector);
unsigned int count;
struct edid *edid;
edid = lt9611uxc->bridge.funcs->get_edid(&lt9611uxc->bridge, connector);
drm_connector_update_edid_property(connector, edid);
count = drm_add_edid_modes(connector, edid);
kfree(edid);
return count;
}
static enum drm_connector_status lt9611uxc_connector_detect(struct drm_connector *connector,
bool force)
{
struct lt9611uxc *lt9611uxc = connector_to_lt9611uxc(connector);
return lt9611uxc->bridge.funcs->detect(&lt9611uxc->bridge);
}
static enum drm_mode_status lt9611uxc_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
struct lt9611uxc_mode *lt9611uxc_mode = lt9611uxc_find_mode(mode);
return lt9611uxc_mode ? MODE_OK : MODE_BAD;
}
static const struct drm_connector_helper_funcs lt9611uxc_bridge_connector_helper_funcs = {
.get_modes = lt9611uxc_connector_get_modes,
.mode_valid = lt9611uxc_connector_mode_valid,
};
static const struct drm_connector_funcs lt9611uxc_bridge_connector_funcs = {
.fill_modes = drm_helper_probe_single_connector_modes,
.detect = lt9611uxc_connector_detect,
.destroy = drm_connector_cleanup,
.reset = drm_atomic_helper_connector_reset,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static int lt9611uxc_connector_init(struct drm_bridge *bridge, struct lt9611uxc *lt9611uxc)
{
int ret;
if (!bridge->encoder) {
DRM_ERROR("Parent encoder object not found");
return -ENODEV;
}
lt9611uxc->connector.polled = DRM_CONNECTOR_POLL_HPD;
drm_connector_helper_add(&lt9611uxc->connector,
&lt9611uxc_bridge_connector_helper_funcs);
ret = drm_connector_init(bridge->dev, &lt9611uxc->connector,
&lt9611uxc_bridge_connector_funcs,
DRM_MODE_CONNECTOR_HDMIA);
if (ret) {
DRM_ERROR("Failed to initialize connector with drm\n");
return ret;
}
return drm_connector_attach_encoder(&lt9611uxc->connector, bridge->encoder);
}
static void lt9611uxc_bridge_detach(struct drm_bridge *bridge)
{
struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
if (lt9611uxc->dsi1) {
mipi_dsi_detach(lt9611uxc->dsi1);
mipi_dsi_device_unregister(lt9611uxc->dsi1);
}
mipi_dsi_detach(lt9611uxc->dsi0);
mipi_dsi_device_unregister(lt9611uxc->dsi0);
}
static int lt9611uxc_bridge_attach(struct drm_bridge *bridge,
enum drm_bridge_attach_flags flags)
{
struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
int ret;
if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
ret = lt9611uxc_connector_init(bridge, lt9611uxc);
if (ret < 0)
return ret;
}
/* Attach primary DSI */
lt9611uxc->dsi0 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi0_node);
if (IS_ERR(lt9611uxc->dsi0))
return PTR_ERR(lt9611uxc->dsi0);
/* Attach secondary DSI, if specified */
if (lt9611uxc->dsi1_node) {
lt9611uxc->dsi1 = lt9611uxc_attach_dsi(lt9611uxc, lt9611uxc->dsi1_node);
if (IS_ERR(lt9611uxc->dsi1)) {
ret = PTR_ERR(lt9611uxc->dsi1);
goto err_unregister_dsi0;
}
}
return 0;
err_unregister_dsi0:
mipi_dsi_detach(lt9611uxc->dsi0);
mipi_dsi_device_unregister(lt9611uxc->dsi0);
return ret;
}
static enum drm_mode_status
lt9611uxc_bridge_mode_valid(struct drm_bridge *bridge,
const struct drm_display_info *info,
const struct drm_display_mode *mode)
{
struct lt9611uxc_mode *lt9611uxc_mode;
lt9611uxc_mode = lt9611uxc_find_mode(mode);
return lt9611uxc_mode ? MODE_OK : MODE_BAD;
}
static void lt9611uxc_video_setup(struct lt9611uxc *lt9611uxc,
const struct drm_display_mode *mode)
{
u32 h_total, hactive, hsync_len, hfront_porch;
u32 v_total, vactive, vsync_len, vfront_porch;
h_total = mode->htotal;
v_total = mode->vtotal;
hactive = mode->hdisplay;
hsync_len = mode->hsync_end - mode->hsync_start;
hfront_porch = mode->hsync_start - mode->hdisplay;
vactive = mode->vdisplay;
vsync_len = mode->vsync_end - mode->vsync_start;
vfront_porch = mode->vsync_start - mode->vdisplay;
regmap_write(lt9611uxc->regmap, 0xd00d, (u8)(v_total / 256));
regmap_write(lt9611uxc->regmap, 0xd00e, (u8)(v_total % 256));
regmap_write(lt9611uxc->regmap, 0xd00f, (u8)(vactive / 256));
regmap_write(lt9611uxc->regmap, 0xd010, (u8)(vactive % 256));
regmap_write(lt9611uxc->regmap, 0xd011, (u8)(h_total / 256));
regmap_write(lt9611uxc->regmap, 0xd012, (u8)(h_total % 256));
regmap_write(lt9611uxc->regmap, 0xd013, (u8)(hactive / 256));
regmap_write(lt9611uxc->regmap, 0xd014, (u8)(hactive % 256));
regmap_write(lt9611uxc->regmap, 0xd015, (u8)(vsync_len % 256));
regmap_update_bits(lt9611uxc->regmap, 0xd016, 0xf, (u8)(hsync_len / 256));
regmap_write(lt9611uxc->regmap, 0xd017, (u8)(hsync_len % 256));
regmap_update_bits(lt9611uxc->regmap, 0xd018, 0xf, (u8)(vfront_porch / 256));
regmap_write(lt9611uxc->regmap, 0xd019, (u8)(vfront_porch % 256));
regmap_update_bits(lt9611uxc->regmap, 0xd01a, 0xf, (u8)(hfront_porch / 256));
regmap_write(lt9611uxc->regmap, 0xd01b, (u8)(hfront_porch % 256));
}
static void lt9611uxc_bridge_mode_set(struct drm_bridge *bridge,
const struct drm_display_mode *mode,
const struct drm_display_mode *adj_mode)
{
struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
lt9611uxc_lock(lt9611uxc);
lt9611uxc_video_setup(lt9611uxc, mode);
lt9611uxc_unlock(lt9611uxc);
}
static enum drm_connector_status lt9611uxc_bridge_detect(struct drm_bridge *bridge)
{
struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
unsigned int reg_val = 0;
int ret;
bool connected = true;
lt9611uxc_lock(lt9611uxc);
if (lt9611uxc->hpd_supported) {
ret = regmap_read(lt9611uxc->regmap, 0xb023, &reg_val);
if (ret)
dev_err(lt9611uxc->dev, "failed to read hpd status: %d\n", ret);
else
connected = reg_val & BIT(1);
}
lt9611uxc->hdmi_connected = connected;
lt9611uxc_unlock(lt9611uxc);
return connected ? connector_status_connected :
connector_status_disconnected;
}
static int lt9611uxc_wait_for_edid(struct lt9611uxc *lt9611uxc)
{
return wait_event_interruptible_timeout(lt9611uxc->wq, lt9611uxc->edid_read,
msecs_to_jiffies(500));
}
static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
{
struct lt9611uxc *lt9611uxc = data;
int ret;
if (len > EDID_BLOCK_SIZE)
return -EINVAL;
if (block >= EDID_NUM_BLOCKS)
return -EINVAL;
lt9611uxc_lock(lt9611uxc);
regmap_write(lt9611uxc->regmap, 0xb00b, 0x10);
regmap_write(lt9611uxc->regmap, 0xb00a, block * EDID_BLOCK_SIZE);
ret = regmap_noinc_read(lt9611uxc->regmap, 0xb0b0, buf, len);
if (ret)
dev_err(lt9611uxc->dev, "edid read failed: %d\n", ret);
lt9611uxc_unlock(lt9611uxc);
return 0;
};
static struct edid *lt9611uxc_bridge_get_edid(struct drm_bridge *bridge,
struct drm_connector *connector)
{
struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge);
int ret;
ret = lt9611uxc_wait_for_edid(lt9611uxc);
if (ret < 0) {
dev_err(lt9611uxc->dev, "wait for EDID failed: %d\n", ret);
return NULL;
} else if (ret == 0) {
dev_err(lt9611uxc->dev, "wait for EDID timeout\n");
return NULL;
}
return drm_do_get_edid(connector, lt9611uxc_get_edid_block, lt9611uxc);
}
static const struct drm_bridge_funcs lt9611uxc_bridge_funcs = {
.attach = lt9611uxc_bridge_attach,
.detach = lt9611uxc_bridge_detach,
.mode_valid = lt9611uxc_bridge_mode_valid,
.mode_set = lt9611uxc_bridge_mode_set,
.detect = lt9611uxc_bridge_detect,
.get_edid = lt9611uxc_bridge_get_edid,
};
static int lt9611uxc_parse_dt(struct device *dev,
struct lt9611uxc *lt9611uxc)
{
lt9611uxc->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1);
if (!lt9611uxc->dsi0_node) {
dev_err(lt9611uxc->dev, "failed to get remote node for primary dsi\n");
return -ENODEV;
}
lt9611uxc->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1);
return 0;
}
static int lt9611uxc_gpio_init(struct lt9611uxc *lt9611uxc)
{
struct device *dev = lt9611uxc->dev;
lt9611uxc->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(lt9611uxc->reset_gpio)) {
dev_err(dev, "failed to acquire reset gpio\n");
return PTR_ERR(lt9611uxc->reset_gpio);
}
lt9611uxc->enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
if (IS_ERR(lt9611uxc->enable_gpio)) {
dev_err(dev, "failed to acquire enable gpio\n");
return PTR_ERR(lt9611uxc->enable_gpio);
}
return 0;
}
static int lt9611uxc_read_device_rev(struct lt9611uxc *lt9611uxc)
{
unsigned int rev0, rev1, rev2;
int ret;
lt9611uxc_lock(lt9611uxc);
ret = regmap_read(lt9611uxc->regmap, 0x8100, &rev0);
ret |= regmap_read(lt9611uxc->regmap, 0x8101, &rev1);
ret |= regmap_read(lt9611uxc->regmap, 0x8102, &rev2);
if (ret)
dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret);
else
dev_info(lt9611uxc->dev, "LT9611 revision: 0x%02x.%02x.%02x\n", rev0, rev1, rev2);
lt9611uxc_unlock(lt9611uxc);
return ret;
}
static int lt9611uxc_read_version(struct lt9611uxc *lt9611uxc)
{
unsigned int rev;
int ret;
lt9611uxc_lock(lt9611uxc);
ret = regmap_read(lt9611uxc->regmap, 0xb021, &rev);
if (ret)
dev_err(lt9611uxc->dev, "failed to read revision: %d\n", ret);
else
dev_info(lt9611uxc->dev, "LT9611 version: 0x%02x\n", rev);
lt9611uxc_unlock(lt9611uxc);
return ret < 0 ? ret : rev;
}
static int lt9611uxc_hdmi_hw_params(struct device *dev, void *data,
struct hdmi_codec_daifmt *fmt,
struct hdmi_codec_params *hparms)
{
/*
* LT9611UXC will automatically detect rate and sample size, so no need
* to setup anything here.
*/
return 0;
}
static void lt9611uxc_audio_shutdown(struct device *dev, void *data)
{
}
static int lt9611uxc_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
struct device_node *endpoint)
{
struct of_endpoint of_ep;
int ret;
ret = of_graph_parse_endpoint(endpoint, &of_ep);
if (ret < 0)
return ret;
/*
* HDMI sound should be located as reg = <2>
* Then, it is sound port 0
*/
if (of_ep.port == 2)
return 0;
return -EINVAL;
}
static const struct hdmi_codec_ops lt9611uxc_codec_ops = {
.hw_params = lt9611uxc_hdmi_hw_params,
.audio_shutdown = lt9611uxc_audio_shutdown,
.get_dai_id = lt9611uxc_hdmi_i2s_get_dai_id,
};
static int lt9611uxc_audio_init(struct device *dev, struct lt9611uxc *lt9611uxc)
{
struct hdmi_codec_pdata codec_data = {
.ops = &lt9611uxc_codec_ops,
.max_i2s_channels = 2,
.i2s = 1,
.data = lt9611uxc,
};
lt9611uxc->audio_pdev =
platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
PLATFORM_DEVID_AUTO,
&codec_data, sizeof(codec_data));
return PTR_ERR_OR_ZERO(lt9611uxc->audio_pdev);
}
static void lt9611uxc_audio_exit(struct lt9611uxc *lt9611uxc)
{
if (lt9611uxc->audio_pdev) {
platform_device_unregister(lt9611uxc->audio_pdev);
lt9611uxc->audio_pdev = NULL;
}
}
#define LT9611UXC_FW_PAGE_SIZE 32
static void lt9611uxc_firmware_write_page(struct lt9611uxc *lt9611uxc, u16 addr, const u8 *buf)
{
struct reg_sequence seq_write_prepare[] = {
REG_SEQ0(0x805a, 0x04),
REG_SEQ0(0x805a, 0x00),
REG_SEQ0(0x805e, 0xdf),
REG_SEQ0(0x805a, 0x20),
REG_SEQ0(0x805a, 0x00),
REG_SEQ0(0x8058, 0x21),
};
struct reg_sequence seq_write_addr[] = {
REG_SEQ0(0x805b, (addr >> 16) & 0xff),
REG_SEQ0(0x805c, (addr >> 8) & 0xff),
REG_SEQ0(0x805d, addr & 0xff),
REG_SEQ0(0x805a, 0x10),
REG_SEQ0(0x805a, 0x00),
};
regmap_write(lt9611uxc->regmap, 0x8108, 0xbf);
msleep(20);
regmap_write(lt9611uxc->regmap, 0x8108, 0xff);
msleep(20);
regmap_multi_reg_write(lt9611uxc->regmap, seq_write_prepare, ARRAY_SIZE(seq_write_prepare));
regmap_noinc_write(lt9611uxc->regmap, 0x8059, buf, LT9611UXC_FW_PAGE_SIZE);
regmap_multi_reg_write(lt9611uxc->regmap, seq_write_addr, ARRAY_SIZE(seq_write_addr));
msleep(20);
}
static void lt9611uxc_firmware_read_page(struct lt9611uxc *lt9611uxc, u16 addr, char *buf)
{
struct reg_sequence seq_read_page[] = {
REG_SEQ0(0x805a, 0xa0),
REG_SEQ0(0x805a, 0x80),
REG_SEQ0(0x805b, (addr >> 16) & 0xff),
REG_SEQ0(0x805c, (addr >> 8) & 0xff),
REG_SEQ0(0x805d, addr & 0xff),
REG_SEQ0(0x805a, 0x90),
REG_SEQ0(0x805a, 0x80),
REG_SEQ0(0x8058, 0x21),
};
regmap_multi_reg_write(lt9611uxc->regmap, seq_read_page, ARRAY_SIZE(seq_read_page));
regmap_noinc_read(lt9611uxc->regmap, 0x805f, buf, LT9611UXC_FW_PAGE_SIZE);
}
static char *lt9611uxc_firmware_read(struct lt9611uxc *lt9611uxc, size_t size)
{
struct reg_sequence seq_read_setup[] = {
REG_SEQ0(0x805a, 0x84),
REG_SEQ0(0x805a, 0x80),
};
char *readbuf;
u16 offset;
readbuf = kzalloc(ALIGN(size, 32), GFP_KERNEL);
if (!readbuf)
return NULL;
regmap_multi_reg_write(lt9611uxc->regmap, seq_read_setup, ARRAY_SIZE(seq_read_setup));
for (offset = 0;
offset < size;
offset += LT9611UXC_FW_PAGE_SIZE)
lt9611uxc_firmware_read_page(lt9611uxc, offset, &readbuf[offset]);
return readbuf;
}
static int lt9611uxc_firmware_update(struct lt9611uxc *lt9611uxc)
{
int ret;
u16 offset;
size_t remain;
char *readbuf;
const struct firmware *fw;
struct reg_sequence seq_setup[] = {
REG_SEQ0(0x805e, 0xdf),
REG_SEQ0(0x8058, 0x00),
REG_SEQ0(0x8059, 0x50),
REG_SEQ0(0x805a, 0x10),
REG_SEQ0(0x805a, 0x00),
};
struct reg_sequence seq_block_erase[] = {
REG_SEQ0(0x805a, 0x04),
REG_SEQ0(0x805a, 0x00),
REG_SEQ0(0x805b, 0x00),
REG_SEQ0(0x805c, 0x00),
REG_SEQ0(0x805d, 0x00),
REG_SEQ0(0x805a, 0x01),
REG_SEQ0(0x805a, 0x00),
};
ret = request_firmware(&fw, "lt9611uxc_fw.bin", lt9611uxc->dev);
if (ret < 0)
return ret;
dev_info(lt9611uxc->dev, "Updating firmware\n");
lt9611uxc_lock(lt9611uxc);
regmap_multi_reg_write(lt9611uxc->regmap, seq_setup, ARRAY_SIZE(seq_setup));
/*
* Need erase block 2 timess here. Sometimes, block erase can fail.
* This is a workaroud.
*/
regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase));
msleep(3000);
regmap_multi_reg_write(lt9611uxc->regmap, seq_block_erase, ARRAY_SIZE(seq_block_erase));
msleep(3000);
for (offset = 0, remain = fw->size;
remain >= LT9611UXC_FW_PAGE_SIZE;
offset += LT9611UXC_FW_PAGE_SIZE, remain -= LT9611UXC_FW_PAGE_SIZE)
lt9611uxc_firmware_write_page(lt9611uxc, offset, fw->data + offset);
if (remain > 0) {
char buf[LT9611UXC_FW_PAGE_SIZE];
memset(buf, 0xff, LT9611UXC_FW_PAGE_SIZE);
memcpy(buf, fw->data + offset, remain);
lt9611uxc_firmware_write_page(lt9611uxc, offset, buf);
}
msleep(20);
readbuf = lt9611uxc_firmware_read(lt9611uxc, fw->size);
if (!readbuf) {
ret = -ENOMEM;
goto out;
}
if (!memcmp(readbuf, fw->data, fw->size)) {
dev_err(lt9611uxc->dev, "Firmware update failed\n");
print_hex_dump(KERN_ERR, "fw: ", DUMP_PREFIX_OFFSET, 16, 1, readbuf, fw->size, false);
ret = -EINVAL;
} else {
dev_info(lt9611uxc->dev, "Firmware updates successfully\n");
ret = 0;
}
kfree(readbuf);
out:
lt9611uxc_unlock(lt9611uxc);
lt9611uxc_reset(lt9611uxc);
release_firmware(fw);
return ret;
}
static ssize_t lt9611uxc_firmware_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len)
{
struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev);
int ret;
ret = lt9611uxc_firmware_update(lt9611uxc);
if (ret < 0)
return ret;
return len;
}
static ssize_t lt9611uxc_firmware_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct lt9611uxc *lt9611uxc = dev_get_drvdata(dev);
return sysfs_emit(buf, "%02x\n", lt9611uxc->fw_version);
}
static DEVICE_ATTR_RW(lt9611uxc_firmware);
static struct attribute *lt9611uxc_attrs[] = {
&dev_attr_lt9611uxc_firmware.attr,
NULL,
};
static const struct attribute_group lt9611uxc_attr_group = {
.attrs = lt9611uxc_attrs,
};
static const struct attribute_group *lt9611uxc_attr_groups[] = {
&lt9611uxc_attr_group,
NULL,
};
static int lt9611uxc_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct lt9611uxc *lt9611uxc;
struct device *dev = &client->dev;
int ret;
bool fw_updated = false;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(dev, "device doesn't support I2C\n");
return -ENODEV;
}
lt9611uxc = devm_kzalloc(dev, sizeof(*lt9611uxc), GFP_KERNEL);
if (!lt9611uxc)
return -ENOMEM;
lt9611uxc->dev = &client->dev;
lt9611uxc->client = client;
mutex_init(&lt9611uxc->ocm_lock);
lt9611uxc->regmap = devm_regmap_init_i2c(client, &lt9611uxc_regmap_config);
if (IS_ERR(lt9611uxc->regmap)) {
dev_err(lt9611uxc->dev, "regmap i2c init failed\n");
return PTR_ERR(lt9611uxc->regmap);
}
ret = lt9611uxc_parse_dt(&client->dev, lt9611uxc);
if (ret) {
dev_err(dev, "failed to parse device tree\n");
return ret;
}
ret = lt9611uxc_gpio_init(lt9611uxc);
if (ret < 0)
goto err_of_put;
ret = lt9611uxc_regulator_init(lt9611uxc);
if (ret < 0)
goto err_of_put;
lt9611uxc_assert_5v(lt9611uxc);
ret = lt9611uxc_regulator_enable(lt9611uxc);
if (ret)
goto err_of_put;
lt9611uxc_reset(lt9611uxc);
ret = lt9611uxc_read_device_rev(lt9611uxc);
if (ret) {
dev_err(dev, "failed to read chip rev\n");
goto err_disable_regulators;
}
retry:
ret = lt9611uxc_read_version(lt9611uxc);
if (ret < 0) {
dev_err(dev, "failed to read FW version\n");
goto err_disable_regulators;
} else if (ret == 0) {
if (!fw_updated) {
fw_updated = true;
dev_err(dev, "FW version 0, enforcing firmware update\n");
ret = lt9611uxc_firmware_update(lt9611uxc);
if (ret < 0)
goto err_disable_regulators;
else
goto retry;
} else {
dev_err(dev, "FW version 0, update failed\n");
ret = -EOPNOTSUPP;
goto err_disable_regulators;
}
} else if (ret < 0x40) {
dev_info(dev, "FW version 0x%x, HPD not supported\n", ret);
} else {
lt9611uxc->hpd_supported = true;
}
lt9611uxc->fw_version = ret;
init_waitqueue_head(&lt9611uxc->wq);
INIT_WORK(&lt9611uxc->work, lt9611uxc_hpd_work);
ret = devm_request_threaded_irq(dev, client->irq, NULL,
lt9611uxc_irq_thread_handler,
IRQF_ONESHOT, "lt9611uxc", lt9611uxc);
if (ret) {
dev_err(dev, "failed to request irq\n");
goto err_disable_regulators;
}
i2c_set_clientdata(client, lt9611uxc);
lt9611uxc->bridge.funcs = &lt9611uxc_bridge_funcs;
lt9611uxc->bridge.of_node = client->dev.of_node;
lt9611uxc->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID;
if (lt9611uxc->hpd_supported)
lt9611uxc->bridge.ops |= DRM_BRIDGE_OP_HPD;
lt9611uxc->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
drm_bridge_add(&lt9611uxc->bridge);
return lt9611uxc_audio_init(dev, lt9611uxc);
err_disable_regulators:
regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies);
err_of_put:
of_node_put(lt9611uxc->dsi1_node);
of_node_put(lt9611uxc->dsi0_node);
return ret;
}
static int lt9611uxc_remove(struct i2c_client *client)
{
struct lt9611uxc *lt9611uxc = i2c_get_clientdata(client);
disable_irq(client->irq);
flush_scheduled_work();
lt9611uxc_audio_exit(lt9611uxc);
drm_bridge_remove(&lt9611uxc->bridge);
mutex_destroy(&lt9611uxc->ocm_lock);
regulator_bulk_disable(ARRAY_SIZE(lt9611uxc->supplies), lt9611uxc->supplies);
of_node_put(lt9611uxc->dsi1_node);
of_node_put(lt9611uxc->dsi0_node);
return 0;
}
static struct i2c_device_id lt9611uxc_id[] = {
{ "lontium,lt9611uxc", 0 },
{ /* sentinel */ }
};
static const struct of_device_id lt9611uxc_match_table[] = {
{ .compatible = "lontium,lt9611uxc" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, lt9611uxc_match_table);
static struct i2c_driver lt9611uxc_driver = {
.driver = {
.name = "lt9611uxc",
.of_match_table = lt9611uxc_match_table,
.dev_groups = lt9611uxc_attr_groups,
},
.probe = lt9611uxc_probe,
.remove = lt9611uxc_remove,
.id_table = lt9611uxc_id,
};
module_i2c_driver(lt9611uxc_driver);
MODULE_AUTHOR("Dmitry Baryshkov <dmitry.baryshkov@linaro.org>");
MODULE_LICENSE("GPL v2");