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95e8522588
linux_dsm_epyc7002/drivers/gpu/drm/bridge/sil-sii8620.c
Maciej Purski 95e8522588 drm/bridge/sii8620: remove HSIC initialization 
HSIC initialization was taken from the vendor code. HSIC in MHL circuit
is not connected, so it is not possible to test it. Tests prove that
without HSIC the device works well. Therefore it can be removed.

Signed-off-by: Maciej Purski <m.purski@samsung.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1511968368-30884-1-git-send-email-m.purski@samsung.com
2018-06-13 16:26:57 +02:00

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/*
* Silicon Image SiI8620 HDMI/MHL bridge driver
*
* Copyright (C) 2015, Samsung Electronics Co., Ltd.
* Andrzej Hajda <a.hajda@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <asm/unaligned.h>
#include <drm/bridge/mhl.h>
#include <drm/drm_crtc.h>
#include <drm/drm_edid.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/extcon.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of_graph.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <media/rc-core.h>
#include "sil-sii8620.h"
#define SII8620_BURST_BUF_LEN 288
#define VAL_RX_HDMI_CTRL2_DEFVAL VAL_RX_HDMI_CTRL2_IDLE_CNT(3)
#define MHL1_MAX_PCLK 75000
#define MHL1_MAX_PCLK_PP_MODE 150000
#define MHL3_MAX_PCLK 200000
#define MHL3_MAX_PCLK_PP_MODE 300000
enum sii8620_mode {
CM_DISCONNECTED,
CM_DISCOVERY,
CM_MHL1,
CM_MHL3,
CM_ECBUS_S
};
enum sii8620_sink_type {
SINK_NONE,
SINK_HDMI,
SINK_DVI
};
enum sii8620_mt_state {
MT_STATE_READY,
MT_STATE_BUSY,
MT_STATE_DONE
};
struct sii8620 {
struct drm_bridge bridge;
struct device *dev;
struct rc_dev *rc_dev;
struct clk *clk_xtal;
struct gpio_desc *gpio_reset;
struct gpio_desc *gpio_int;
struct regulator_bulk_data supplies[2];
struct mutex lock; /* context lock, protects fields below */
int error;
int pixel_clock;
unsigned int use_packed_pixel:1;
int video_code;
enum sii8620_mode mode;
enum sii8620_sink_type sink_type;
u8 cbus_status;
u8 stat[MHL_DST_SIZE];
u8 xstat[MHL_XDS_SIZE];
u8 devcap[MHL_DCAP_SIZE];
u8 xdevcap[MHL_XDC_SIZE];
u8 avif[HDMI_INFOFRAME_SIZE(AVI)];
struct edid *edid;
unsigned int gen2_write_burst:1;
enum sii8620_mt_state mt_state;
struct extcon_dev *extcon;
struct notifier_block extcon_nb;
struct work_struct extcon_wq;
int cable_state;
struct list_head mt_queue;
struct {
int r_size;
int r_count;
int rx_ack;
int rx_count;
u8 rx_buf[32];
int tx_count;
u8 tx_buf[32];
} burst;
};
struct sii8620_mt_msg;
typedef void (*sii8620_mt_msg_cb)(struct sii8620 *ctx,
struct sii8620_mt_msg *msg);
typedef void (*sii8620_cb)(struct sii8620 *ctx, int ret);
struct sii8620_mt_msg {
struct list_head node;
u8 reg[4];
u8 ret;
sii8620_mt_msg_cb send;
sii8620_mt_msg_cb recv;
sii8620_cb continuation;
};
static const u8 sii8620_i2c_page[] = {
0x39, /* Main System */
0x3d, /* TDM and HSIC */
0x49, /* TMDS Receiver, MHL EDID */
0x4d, /* eMSC, HDCP, HSIC */
0x5d, /* MHL Spec */
0x64, /* MHL CBUS */
0x59, /* Hardware TPI (Transmitter Programming Interface) */
0x61, /* eCBUS-S, eCBUS-D */
};
static void sii8620_fetch_edid(struct sii8620 *ctx);
static void sii8620_set_upstream_edid(struct sii8620 *ctx);
static void sii8620_enable_hpd(struct sii8620 *ctx);
static void sii8620_mhl_disconnected(struct sii8620 *ctx);
static void sii8620_disconnect(struct sii8620 *ctx);
static int sii8620_clear_error(struct sii8620 *ctx)
{
int ret = ctx->error;
ctx->error = 0;
return ret;
}
static void sii8620_read_buf(struct sii8620 *ctx, u16 addr, u8 *buf, int len)
{
struct device *dev = ctx->dev;
struct i2c_client *client = to_i2c_client(dev);
u8 data = addr;
struct i2c_msg msg[] = {
{
.addr = sii8620_i2c_page[addr >> 8],
.flags = client->flags,
.len = 1,
.buf = &data
},
{
.addr = sii8620_i2c_page[addr >> 8],
.flags = client->flags | I2C_M_RD,
.len = len,
.buf = buf
},
};
int ret;
if (ctx->error)
return;
ret = i2c_transfer(client->adapter, msg, 2);
dev_dbg(dev, "read at %04x: %*ph, %d\n", addr, len, buf, ret);
if (ret != 2) {
dev_err(dev, "Read at %#06x of %d bytes failed with code %d.\n",
addr, len, ret);
ctx->error = ret < 0 ? ret : -EIO;
}
}
static u8 sii8620_readb(struct sii8620 *ctx, u16 addr)
{
u8 ret;
sii8620_read_buf(ctx, addr, &ret, 1);
return ret;
}
static void sii8620_write_buf(struct sii8620 *ctx, u16 addr, const u8 *buf,
int len)
{
struct device *dev = ctx->dev;
struct i2c_client *client = to_i2c_client(dev);
u8 data[2];
struct i2c_msg msg = {
.addr = sii8620_i2c_page[addr >> 8],
.flags = client->flags,
.len = len + 1,
};
int ret;
if (ctx->error)
return;
if (len > 1) {
msg.buf = kmalloc(len + 1, GFP_KERNEL);
if (!msg.buf) {
ctx->error = -ENOMEM;
return;
}
memcpy(msg.buf + 1, buf, len);
} else {
msg.buf = data;
msg.buf[1] = *buf;
}
msg.buf[0] = addr;
ret = i2c_transfer(client->adapter, &msg, 1);
dev_dbg(dev, "write at %04x: %*ph, %d\n", addr, len, buf, ret);
if (ret != 1) {
dev_err(dev, "Write at %#06x of %*ph failed with code %d.\n",
addr, len, buf, ret);
ctx->error = ret ?: -EIO;
}
if (len > 1)
kfree(msg.buf);
}
#define sii8620_write(ctx, addr, arr...) \
({\
u8 d[] = { arr }; \
sii8620_write_buf(ctx, addr, d, ARRAY_SIZE(d)); \
})
static void __sii8620_write_seq(struct sii8620 *ctx, const u16 *seq, int len)
{
int i;
for (i = 0; i < len; i += 2)
sii8620_write(ctx, seq[i], seq[i + 1]);
}
#define sii8620_write_seq(ctx, seq...) \
({\
const u16 d[] = { seq }; \
__sii8620_write_seq(ctx, d, ARRAY_SIZE(d)); \
})
#define sii8620_write_seq_static(ctx, seq...) \
({\
static const u16 d[] = { seq }; \
__sii8620_write_seq(ctx, d, ARRAY_SIZE(d)); \
})
static void sii8620_setbits(struct sii8620 *ctx, u16 addr, u8 mask, u8 val)
{
val = (val & mask) | (sii8620_readb(ctx, addr) & ~mask);
sii8620_write(ctx, addr, val);
}
static inline bool sii8620_is_mhl3(struct sii8620 *ctx)
{
return ctx->mode >= CM_MHL3;
}
static void sii8620_mt_cleanup(struct sii8620 *ctx)
{
struct sii8620_mt_msg *msg, *n;
list_for_each_entry_safe(msg, n, &ctx->mt_queue, node) {
list_del(&msg->node);
kfree(msg);
}
ctx->mt_state = MT_STATE_READY;
}
static void sii8620_mt_work(struct sii8620 *ctx)
{
struct sii8620_mt_msg *msg;
if (ctx->error)
return;
if (ctx->mt_state == MT_STATE_BUSY || list_empty(&ctx->mt_queue))
return;
if (ctx->mt_state == MT_STATE_DONE) {
ctx->mt_state = MT_STATE_READY;
msg = list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg,
node);
list_del(&msg->node);
if (msg->recv)
msg->recv(ctx, msg);
if (msg->continuation)
msg->continuation(ctx, msg->ret);
kfree(msg);
}
if (ctx->mt_state != MT_STATE_READY || list_empty(&ctx->mt_queue))
return;
ctx->mt_state = MT_STATE_BUSY;
msg = list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg, node);
if (msg->send)
msg->send(ctx, msg);
}
static void sii8620_enable_gen2_write_burst(struct sii8620 *ctx)
{
u8 ctrl = BIT_MDT_RCV_CTRL_MDT_RCV_EN;
if (ctx->gen2_write_burst)
return;
if (ctx->mode >= CM_MHL1)
ctrl |= BIT_MDT_RCV_CTRL_MDT_DELAY_RCV_EN;
sii8620_write_seq(ctx,
REG_MDT_RCV_TIMEOUT, 100,
REG_MDT_RCV_CTRL, ctrl
);
ctx->gen2_write_burst = 1;
}
static void sii8620_disable_gen2_write_burst(struct sii8620 *ctx)
{
if (!ctx->gen2_write_burst)
return;
sii8620_write_seq_static(ctx,
REG_MDT_XMIT_CTRL, 0,
REG_MDT_RCV_CTRL, 0
);
ctx->gen2_write_burst = 0;
}
static void sii8620_start_gen2_write_burst(struct sii8620 *ctx)
{
sii8620_write_seq_static(ctx,
REG_MDT_INT_1_MASK, BIT_MDT_RCV_TIMEOUT
| BIT_MDT_RCV_SM_ABORT_PKT_RCVD | BIT_MDT_RCV_SM_ERROR
| BIT_MDT_XMIT_TIMEOUT | BIT_MDT_XMIT_SM_ABORT_PKT_RCVD
| BIT_MDT_XMIT_SM_ERROR,
REG_MDT_INT_0_MASK, BIT_MDT_XFIFO_EMPTY
| BIT_MDT_IDLE_AFTER_HAWB_DISABLE
| BIT_MDT_RFIFO_DATA_RDY
);
sii8620_enable_gen2_write_burst(ctx);
}
static void sii8620_mt_msc_cmd_send(struct sii8620 *ctx,
struct sii8620_mt_msg *msg)
{
if (msg->reg[0] == MHL_SET_INT &&
msg->reg[1] == MHL_INT_REG(RCHANGE) &&
msg->reg[2] == MHL_INT_RC_FEAT_REQ)
sii8620_enable_gen2_write_burst(ctx);
else
sii8620_disable_gen2_write_burst(ctx);
switch (msg->reg[0]) {
case MHL_WRITE_STAT:
case MHL_SET_INT:
sii8620_write_buf(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg + 1, 2);
sii8620_write(ctx, REG_MSC_COMMAND_START,
BIT_MSC_COMMAND_START_WRITE_STAT);
break;
case MHL_MSC_MSG:
sii8620_write_buf(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg, 3);
sii8620_write(ctx, REG_MSC_COMMAND_START,
BIT_MSC_COMMAND_START_MSC_MSG);
break;
case MHL_READ_DEVCAP_REG:
case MHL_READ_XDEVCAP_REG:
sii8620_write(ctx, REG_MSC_CMD_OR_OFFSET, msg->reg[1]);
sii8620_write(ctx, REG_MSC_COMMAND_START,
BIT_MSC_COMMAND_START_READ_DEVCAP);
break;
default:
dev_err(ctx->dev, "%s: command %#x not supported\n", __func__,
msg->reg[0]);
}
}
static struct sii8620_mt_msg *sii8620_mt_msg_new(struct sii8620 *ctx)
{
struct sii8620_mt_msg *msg = kzalloc(sizeof(*msg), GFP_KERNEL);
if (!msg)
ctx->error = -ENOMEM;
else
list_add_tail(&msg->node, &ctx->mt_queue);
return msg;
}
static void sii8620_mt_set_cont(struct sii8620 *ctx, sii8620_cb cont)
{
struct sii8620_mt_msg *msg;
if (ctx->error)
return;
if (list_empty(&ctx->mt_queue)) {
ctx->error = -EINVAL;
return;
}
msg = list_last_entry(&ctx->mt_queue, struct sii8620_mt_msg, node);
msg->continuation = cont;
}
static void sii8620_mt_msc_cmd(struct sii8620 *ctx, u8 cmd, u8 arg1, u8 arg2)
{
struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx);
if (!msg)
return;
msg->reg[0] = cmd;
msg->reg[1] = arg1;
msg->reg[2] = arg2;
msg->send = sii8620_mt_msc_cmd_send;
}
static void sii8620_mt_write_stat(struct sii8620 *ctx, u8 reg, u8 val)
{
sii8620_mt_msc_cmd(ctx, MHL_WRITE_STAT, reg, val);
}
static inline void sii8620_mt_set_int(struct sii8620 *ctx, u8 irq, u8 mask)
{
sii8620_mt_msc_cmd(ctx, MHL_SET_INT, irq, mask);
}
static void sii8620_mt_msc_msg(struct sii8620 *ctx, u8 cmd, u8 data)
{
sii8620_mt_msc_cmd(ctx, MHL_MSC_MSG, cmd, data);
}
static void sii8620_mt_rap(struct sii8620 *ctx, u8 code)
{
sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RAP, code);
}
static void sii8620_mt_rcpk(struct sii8620 *ctx, u8 code)
{
sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RCPK, code);
}
static void sii8620_mt_rcpe(struct sii8620 *ctx, u8 code)
{
sii8620_mt_msc_msg(ctx, MHL_MSC_MSG_RCPE, code);
}
static void sii8620_mt_read_devcap_send(struct sii8620 *ctx,
struct sii8620_mt_msg *msg)
{
u8 ctrl = BIT_EDID_CTRL_DEVCAP_SELECT_DEVCAP
| BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
| BIT_EDID_CTRL_EDID_MODE_EN;
if (msg->reg[0] == MHL_READ_XDEVCAP)
ctrl |= BIT_EDID_CTRL_XDEVCAP_EN;
sii8620_write_seq(ctx,
REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE,
REG_EDID_CTRL, ctrl,
REG_TPI_CBUS_START, BIT_TPI_CBUS_START_GET_DEVCAP_START
);
}
/* copy src to dst and set changed bits in src */
static void sii8620_update_array(u8 *dst, u8 *src, int count)
{
while (--count >= 0) {
*src ^= *dst;
*dst++ ^= *src++;
}
}
static void sii8620_sink_detected(struct sii8620 *ctx, int ret)
{
static const char * const sink_str[] = {
[SINK_NONE] = "NONE",
[SINK_HDMI] = "HDMI",
[SINK_DVI] = "DVI"
};
char sink_name[20];
struct device *dev = ctx->dev;
if (ret < 0)
return;
sii8620_fetch_edid(ctx);
if (!ctx->edid) {
dev_err(ctx->dev, "Cannot fetch EDID\n");
sii8620_mhl_disconnected(ctx);
return;
}
if (drm_detect_hdmi_monitor(ctx->edid))
ctx->sink_type = SINK_HDMI;
else
ctx->sink_type = SINK_DVI;
drm_edid_get_monitor_name(ctx->edid, sink_name, ARRAY_SIZE(sink_name));
dev_info(dev, "detected sink(type: %s): %s\n",
sink_str[ctx->sink_type], sink_name);
}
static void sii8620_edid_read(struct sii8620 *ctx, int ret)
{
if (ret < 0)
return;
sii8620_set_upstream_edid(ctx);
sii8620_enable_hpd(ctx);
}
static void sii8620_mr_devcap(struct sii8620 *ctx)
{
u8 dcap[MHL_DCAP_SIZE];
struct device *dev = ctx->dev;
sii8620_read_buf(ctx, REG_EDID_FIFO_RD_DATA, dcap, MHL_DCAP_SIZE);
if (ctx->error < 0)
return;
dev_info(dev, "detected dongle MHL %d.%d, ChipID %02x%02x:%02x%02x\n",
dcap[MHL_DCAP_MHL_VERSION] / 16,
dcap[MHL_DCAP_MHL_VERSION] % 16,
dcap[MHL_DCAP_ADOPTER_ID_H], dcap[MHL_DCAP_ADOPTER_ID_L],
dcap[MHL_DCAP_DEVICE_ID_H], dcap[MHL_DCAP_DEVICE_ID_L]);
sii8620_update_array(ctx->devcap, dcap, MHL_DCAP_SIZE);
}
static void sii8620_mr_xdevcap(struct sii8620 *ctx)
{
sii8620_read_buf(ctx, REG_EDID_FIFO_RD_DATA, ctx->xdevcap,
MHL_XDC_SIZE);
}
static void sii8620_mt_read_devcap_recv(struct sii8620 *ctx,
struct sii8620_mt_msg *msg)
{
u8 ctrl = BIT_EDID_CTRL_DEVCAP_SELECT_DEVCAP
| BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
| BIT_EDID_CTRL_EDID_MODE_EN;
if (msg->reg[0] == MHL_READ_XDEVCAP)
ctrl |= BIT_EDID_CTRL_XDEVCAP_EN;
sii8620_write_seq(ctx,
REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE | BIT_INTR9_EDID_DONE
| BIT_INTR9_EDID_ERROR,
REG_EDID_CTRL, ctrl,
REG_EDID_FIFO_ADDR, 0
);
if (msg->reg[0] == MHL_READ_XDEVCAP)
sii8620_mr_xdevcap(ctx);
else
sii8620_mr_devcap(ctx);
}
static void sii8620_mt_read_devcap(struct sii8620 *ctx, bool xdevcap)
{
struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx);
if (!msg)
return;
msg->reg[0] = xdevcap ? MHL_READ_XDEVCAP : MHL_READ_DEVCAP;
msg->send = sii8620_mt_read_devcap_send;
msg->recv = sii8620_mt_read_devcap_recv;
}
static void sii8620_mt_read_devcap_reg_recv(struct sii8620 *ctx,
struct sii8620_mt_msg *msg)
{
u8 reg = msg->reg[1] & 0x7f;
if (msg->reg[1] & 0x80)
ctx->xdevcap[reg] = msg->ret;
else
ctx->devcap[reg] = msg->ret;
}
static void sii8620_mt_read_devcap_reg(struct sii8620 *ctx, u8 reg)
{
struct sii8620_mt_msg *msg = sii8620_mt_msg_new(ctx);
if (!msg)
return;
msg->reg[0] = (reg & 0x80) ? MHL_READ_XDEVCAP_REG : MHL_READ_DEVCAP_REG;
msg->reg[1] = reg;
msg->send = sii8620_mt_msc_cmd_send;
msg->recv = sii8620_mt_read_devcap_reg_recv;
}
static inline void sii8620_mt_read_xdevcap_reg(struct sii8620 *ctx, u8 reg)
{
sii8620_mt_read_devcap_reg(ctx, reg | 0x80);
}
static void *sii8620_burst_get_tx_buf(struct sii8620 *ctx, int len)
{
u8 *buf = &ctx->burst.tx_buf[ctx->burst.tx_count];
int size = len + 2;
if (ctx->burst.tx_count + size > ARRAY_SIZE(ctx->burst.tx_buf)) {
dev_err(ctx->dev, "TX-BLK buffer exhausted\n");
ctx->error = -EINVAL;
return NULL;
}
ctx->burst.tx_count += size;
buf[1] = len;
return buf + 2;
}
static u8 *sii8620_burst_get_rx_buf(struct sii8620 *ctx, int len)
{
u8 *buf = &ctx->burst.rx_buf[ctx->burst.rx_count];
int size = len + 1;
if (ctx->burst.tx_count + size > ARRAY_SIZE(ctx->burst.tx_buf)) {
dev_err(ctx->dev, "RX-BLK buffer exhausted\n");
ctx->error = -EINVAL;
return NULL;
}
ctx->burst.rx_count += size;
buf[0] = len;
return buf + 1;
}
static void sii8620_burst_send(struct sii8620 *ctx)
{
int tx_left = ctx->burst.tx_count;
u8 *d = ctx->burst.tx_buf;
while (tx_left > 0) {
int len = d[1] + 2;
if (ctx->burst.r_count + len > ctx->burst.r_size)
break;
d[0] = min(ctx->burst.rx_ack, 255);
ctx->burst.rx_ack -= d[0];
sii8620_write_buf(ctx, REG_EMSC_XMIT_WRITE_PORT, d, len);
ctx->burst.r_count += len;
tx_left -= len;
d += len;
}
ctx->burst.tx_count = tx_left;
while (ctx->burst.rx_ack > 0) {
u8 b[2] = { min(ctx->burst.rx_ack, 255), 0 };
if (ctx->burst.r_count + 2 > ctx->burst.r_size)
break;
ctx->burst.rx_ack -= b[0];
sii8620_write_buf(ctx, REG_EMSC_XMIT_WRITE_PORT, b, 2);
ctx->burst.r_count += 2;
}
}
static void sii8620_burst_receive(struct sii8620 *ctx)
{
u8 buf[3], *d;
int count;
sii8620_read_buf(ctx, REG_EMSCRFIFOBCNTL, buf, 2);
count = get_unaligned_le16(buf);
while (count > 0) {
int len = min(count, 3);
sii8620_read_buf(ctx, REG_EMSC_RCV_READ_PORT, buf, len);
count -= len;
ctx->burst.rx_ack += len - 1;
ctx->burst.r_count -= buf[1];
if (ctx->burst.r_count < 0)
ctx->burst.r_count = 0;
if (len < 3 || !buf[2])
continue;
len = buf[2];
d = sii8620_burst_get_rx_buf(ctx, len);
if (!d)
continue;
sii8620_read_buf(ctx, REG_EMSC_RCV_READ_PORT, d, len);
count -= len;
ctx->burst.rx_ack += len;
}
}
static void sii8620_burst_tx_rbuf_info(struct sii8620 *ctx, int size)
{
struct mhl_burst_blk_rcv_buffer_info *d =
sii8620_burst_get_tx_buf(ctx, sizeof(*d));
if (!d)
return;
d->id = cpu_to_be16(MHL_BURST_ID_BLK_RCV_BUFFER_INFO);
d->size = cpu_to_le16(size);
}
static u8 sii8620_checksum(void *ptr, int size)
{
u8 *d = ptr, sum = 0;
while (size--)
sum += *d++;
return sum;
}
static void sii8620_mhl_burst_hdr_set(struct mhl3_burst_header *h,
enum mhl_burst_id id)
{
h->id = cpu_to_be16(id);
h->total_entries = 1;
h->sequence_index = 1;
}
static void sii8620_burst_tx_bits_per_pixel_fmt(struct sii8620 *ctx, u8 fmt)
{
struct mhl_burst_bits_per_pixel_fmt *d;
const int size = sizeof(*d) + sizeof(d->desc[0]);
d = sii8620_burst_get_tx_buf(ctx, size);
if (!d)
return;
sii8620_mhl_burst_hdr_set(&d->hdr, MHL_BURST_ID_BITS_PER_PIXEL_FMT);
d->num_entries = 1;
d->desc[0].stream_id = 0;
d->desc[0].pixel_format = fmt;
d->hdr.checksum -= sii8620_checksum(d, size);
}
static void sii8620_burst_rx_all(struct sii8620 *ctx)
{
u8 *d = ctx->burst.rx_buf;
int count = ctx->burst.rx_count;
while (count-- > 0) {
int len = *d++;
int id = get_unaligned_be16(&d[0]);
switch (id) {
case MHL_BURST_ID_BLK_RCV_BUFFER_INFO:
ctx->burst.r_size = get_unaligned_le16(&d[2]);
break;
default:
break;
}
count -= len;
d += len;
}
ctx->burst.rx_count = 0;
}
static void sii8620_fetch_edid(struct sii8620 *ctx)
{
u8 lm_ddc, ddc_cmd, int3, cbus;
unsigned long timeout;
int fetched, i;
int edid_len = EDID_LENGTH;
u8 *edid;
sii8620_readb(ctx, REG_CBUS_STATUS);
lm_ddc = sii8620_readb(ctx, REG_LM_DDC);
ddc_cmd = sii8620_readb(ctx, REG_DDC_CMD);
sii8620_write_seq(ctx,
REG_INTR9_MASK, 0,
REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO,
REG_HDCP2X_POLL_CS, 0x71,
REG_HDCP2X_CTRL_0, BIT_HDCP2X_CTRL_0_HDCP2X_HDCPTX,
REG_LM_DDC, lm_ddc | BIT_LM_DDC_SW_TPI_EN_DISABLED,
);
for (i = 0; i < 256; ++i) {
u8 ddc_stat = sii8620_readb(ctx, REG_DDC_STATUS);
if (!(ddc_stat & BIT_DDC_STATUS_DDC_I2C_IN_PROG))
break;
sii8620_write(ctx, REG_DDC_STATUS,
BIT_DDC_STATUS_DDC_FIFO_EMPTY);
}
sii8620_write(ctx, REG_DDC_ADDR, 0x50 << 1);
edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
if (!edid) {
ctx->error = -ENOMEM;
return;
}
#define FETCH_SIZE 16
for (fetched = 0; fetched < edid_len; fetched += FETCH_SIZE) {
sii8620_readb(ctx, REG_DDC_STATUS);
sii8620_write_seq(ctx,
REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_DDC_CMD_ABORT,
REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_DDC_CMD_CLEAR_FIFO,
REG_DDC_STATUS, BIT_DDC_STATUS_DDC_FIFO_EMPTY
);
sii8620_write_seq(ctx,
REG_DDC_SEGM, fetched >> 8,
REG_DDC_OFFSET, fetched & 0xff,
REG_DDC_DIN_CNT1, FETCH_SIZE,
REG_DDC_DIN_CNT2, 0,
REG_DDC_CMD, ddc_cmd | VAL_DDC_CMD_ENH_DDC_READ_NO_ACK
);
int3 = 0;
timeout = jiffies + msecs_to_jiffies(200);
for (;;) {
cbus = sii8620_readb(ctx, REG_CBUS_STATUS);
if (~cbus & BIT_CBUS_STATUS_CBUS_CONNECTED) {
kfree(edid);
edid = NULL;
goto end;
}
if (int3 & BIT_DDC_CMD_DONE) {
if (sii8620_readb(ctx, REG_DDC_DOUT_CNT)
>= FETCH_SIZE)
break;
} else {
int3 = sii8620_readb(ctx, REG_INTR3);
}
if (time_is_before_jiffies(timeout)) {
ctx->error = -ETIMEDOUT;
dev_err(ctx->dev, "timeout during EDID read\n");
kfree(edid);
edid = NULL;
goto end;
}
usleep_range(10, 20);
}
sii8620_read_buf(ctx, REG_DDC_DATA, edid + fetched, FETCH_SIZE);
if (fetched + FETCH_SIZE == EDID_LENGTH) {
u8 ext = ((struct edid *)edid)->extensions;
if (ext) {
u8 *new_edid;
edid_len += ext * EDID_LENGTH;
new_edid = krealloc(edid, edid_len, GFP_KERNEL);
if (!new_edid) {
kfree(edid);
ctx->error = -ENOMEM;
return;
}
edid = new_edid;
}
}
}
sii8620_write_seq(ctx,
REG_INTR3_MASK, BIT_DDC_CMD_DONE,
REG_LM_DDC, lm_ddc
);
end:
kfree(ctx->edid);
ctx->edid = (struct edid *)edid;
}
static void sii8620_set_upstream_edid(struct sii8620 *ctx)
{
sii8620_setbits(ctx, REG_DPD, BIT_DPD_PDNRX12 | BIT_DPD_PDIDCK_N
| BIT_DPD_PD_MHL_CLK_N, 0xff);
sii8620_write_seq_static(ctx,
REG_RX_HDMI_CTRL3, 0x00,
REG_PKT_FILTER_0, 0xFF,
REG_PKT_FILTER_1, 0xFF,
REG_ALICE0_BW_I2C, 0x06
);
sii8620_setbits(ctx, REG_RX_HDMI_CLR_BUFFER,
BIT_RX_HDMI_CLR_BUFFER_VSI_CLR_EN, 0xff);
sii8620_write_seq_static(ctx,
REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
| BIT_EDID_CTRL_EDID_MODE_EN,
REG_EDID_FIFO_ADDR, 0,
);
sii8620_write_buf(ctx, REG_EDID_FIFO_WR_DATA, (u8 *)ctx->edid,
(ctx->edid->extensions + 1) * EDID_LENGTH);
sii8620_write_seq_static(ctx,
REG_EDID_CTRL, BIT_EDID_CTRL_EDID_PRIME_VALID
| BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO
| BIT_EDID_CTRL_EDID_MODE_EN,
REG_INTR5_MASK, BIT_INTR_SCDT_CHANGE,
REG_INTR9_MASK, 0
);
}
static void sii8620_xtal_set_rate(struct sii8620 *ctx)
{
static const struct {
unsigned int rate;
u8 div;
u8 tp1;
} rates[] = {
{ 19200, 0x04, 0x53 },
{ 20000, 0x04, 0x62 },
{ 24000, 0x05, 0x75 },
{ 30000, 0x06, 0x92 },
{ 38400, 0x0c, 0xbc },
};
unsigned long rate = clk_get_rate(ctx->clk_xtal) / 1000;
int i;
for (i = 0; i < ARRAY_SIZE(rates) - 1; ++i)
if (rate <= rates[i].rate)
break;
if (rate != rates[i].rate)
dev_err(ctx->dev, "xtal clock rate(%lukHz) not supported, setting MHL for %ukHz.\n",
rate, rates[i].rate);
sii8620_write(ctx, REG_DIV_CTL_MAIN, rates[i].div);
sii8620_write(ctx, REG_HDCP2X_TP1, rates[i].tp1);
}
static int sii8620_hw_on(struct sii8620 *ctx)
{
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
if (ret)
return ret;
usleep_range(10000, 20000);
ret = clk_prepare_enable(ctx->clk_xtal);
if (ret)
return ret;
msleep(100);
gpiod_set_value(ctx->gpio_reset, 0);
msleep(100);
return 0;
}
static int sii8620_hw_off(struct sii8620 *ctx)
{
clk_disable_unprepare(ctx->clk_xtal);
gpiod_set_value(ctx->gpio_reset, 1);
return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
}
static void sii8620_cbus_reset(struct sii8620 *ctx)
{
sii8620_write(ctx, REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST
| BIT_PWD_SRST_CBUS_RST_SW_EN);
usleep_range(10000, 20000);
sii8620_write(ctx, REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST_SW_EN);
}
static void sii8620_set_auto_zone(struct sii8620 *ctx)
{
if (ctx->mode != CM_MHL1) {
sii8620_write_seq_static(ctx,
REG_TX_ZONE_CTL1, 0x0,
REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
| BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL
| BIT_MHL_PLL_CTL0_ZONE_MASK_OE
);
} else {
sii8620_write_seq_static(ctx,
REG_TX_ZONE_CTL1, VAL_TX_ZONE_CTL1_TX_ZONE_CTRL_MODE,
REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
| BIT_MHL_PLL_CTL0_ZONE_MASK_OE
);
}
}
static void sii8620_stop_video(struct sii8620 *ctx)
{
u8 uninitialized_var(val);
sii8620_write_seq_static(ctx,
REG_TPI_INTR_EN, 0,
REG_HDCP2X_INTR0_MASK, 0,
REG_TPI_COPP_DATA2, 0,
REG_TPI_INTR_ST0, ~0,
);
switch (ctx->sink_type) {
case SINK_DVI:
val = BIT_TPI_SC_REG_TMDS_OE_POWER_DOWN
| BIT_TPI_SC_TPI_AV_MUTE;
break;
case SINK_HDMI:
default:
val = BIT_TPI_SC_REG_TMDS_OE_POWER_DOWN
| BIT_TPI_SC_TPI_AV_MUTE
| BIT_TPI_SC_TPI_OUTPUT_MODE_0_HDMI;
break;
}
sii8620_write(ctx, REG_TPI_SC, val);
}
static void sii8620_set_format(struct sii8620 *ctx)
{
u8 out_fmt;
if (sii8620_is_mhl3(ctx)) {
sii8620_setbits(ctx, REG_M3_P0CTRL,
BIT_M3_P0CTRL_MHL3_P0_PIXEL_MODE_PACKED,
ctx->use_packed_pixel ? ~0 : 0);
} else {
if (ctx->use_packed_pixel)
sii8620_write_seq_static(ctx,
REG_VID_MODE, BIT_VID_MODE_M1080P,
REG_MHL_TOP_CTL, BIT_MHL_TOP_CTL_MHL_PP_SEL | 1,
REG_MHLTX_CTL6, 0x60
);
else
sii8620_write_seq_static(ctx,
REG_VID_MODE, 0,
REG_MHL_TOP_CTL, 1,
REG_MHLTX_CTL6, 0xa0
);
}
if (ctx->use_packed_pixel)
out_fmt = VAL_TPI_FORMAT(YCBCR422, FULL) |
BIT_TPI_OUTPUT_CSCMODE709;
else
out_fmt = VAL_TPI_FORMAT(RGB, FULL);
sii8620_write_seq(ctx,
REG_TPI_INPUT, VAL_TPI_FORMAT(RGB, FULL),
REG_TPI_OUTPUT, out_fmt,
);
}
static int mhl3_infoframe_init(struct mhl3_infoframe *frame)
{
memset(frame, 0, sizeof(*frame));
frame->version = 3;
frame->hev_format = -1;
return 0;
}
static ssize_t mhl3_infoframe_pack(struct mhl3_infoframe *frame,
void *buffer, size_t size)
{
const int frm_len = HDMI_INFOFRAME_HEADER_SIZE + MHL3_INFOFRAME_SIZE;
u8 *ptr = buffer;
if (size < frm_len)
return -ENOSPC;
memset(buffer, 0, size);
ptr[0] = HDMI_INFOFRAME_TYPE_VENDOR;
ptr[1] = frame->version;
ptr[2] = MHL3_INFOFRAME_SIZE;
ptr[4] = MHL3_IEEE_OUI & 0xff;
ptr[5] = (MHL3_IEEE_OUI >> 8) & 0xff;
ptr[6] = (MHL3_IEEE_OUI >> 16) & 0xff;
ptr[7] = frame->video_format & 0x3;
ptr[7] |= (frame->format_type & 0x7) << 2;
ptr[7] |= frame->sep_audio ? BIT(5) : 0;
if (frame->hev_format >= 0) {
ptr[9] = 1;
ptr[10] = (frame->hev_format >> 8) & 0xff;
ptr[11] = frame->hev_format & 0xff;
}
if (frame->av_delay) {
bool sign = frame->av_delay < 0;
int delay = sign ? -frame->av_delay : frame->av_delay;
ptr[12] = (delay >> 16) & 0xf;
if (sign)
ptr[12] |= BIT(4);
ptr[13] = (delay >> 8) & 0xff;
ptr[14] = delay & 0xff;
}
ptr[3] -= sii8620_checksum(buffer, frm_len);
return frm_len;
}
static void sii8620_set_infoframes(struct sii8620 *ctx)
{
struct mhl3_infoframe mhl_frm;
union hdmi_infoframe frm;
u8 buf[31];
int ret;
if (!sii8620_is_mhl3(ctx) || !ctx->use_packed_pixel) {
sii8620_write(ctx, REG_TPI_SC,
BIT_TPI_SC_TPI_OUTPUT_MODE_0_HDMI);
sii8620_write_buf(ctx, REG_TPI_AVI_CHSUM, ctx->avif + 3,
ARRAY_SIZE(ctx->avif) - 3);
sii8620_write(ctx, REG_PKT_FILTER_0,
BIT_PKT_FILTER_0_DROP_CEA_GAMUT_PKT |
BIT_PKT_FILTER_0_DROP_MPEG_PKT |
BIT_PKT_FILTER_0_DROP_GCP_PKT,
BIT_PKT_FILTER_1_DROP_GEN_PKT);
return;
}
ret = hdmi_avi_infoframe_init(&frm.avi);
frm.avi.colorspace = HDMI_COLORSPACE_YUV422;
frm.avi.active_aspect = HDMI_ACTIVE_ASPECT_PICTURE;
frm.avi.picture_aspect = HDMI_PICTURE_ASPECT_16_9;
frm.avi.colorimetry = HDMI_COLORIMETRY_ITU_709;
frm.avi.video_code = ctx->video_code;
if (!ret)
ret = hdmi_avi_infoframe_pack(&frm.avi, buf, ARRAY_SIZE(buf));
if (ret > 0)
sii8620_write_buf(ctx, REG_TPI_AVI_CHSUM, buf + 3, ret - 3);
sii8620_write(ctx, REG_PKT_FILTER_0,
BIT_PKT_FILTER_0_DROP_CEA_GAMUT_PKT |
BIT_PKT_FILTER_0_DROP_MPEG_PKT |
BIT_PKT_FILTER_0_DROP_AVI_PKT |
BIT_PKT_FILTER_0_DROP_GCP_PKT,
BIT_PKT_FILTER_1_VSI_OVERRIDE_DIS |
BIT_PKT_FILTER_1_DROP_GEN_PKT |
BIT_PKT_FILTER_1_DROP_VSIF_PKT);
sii8620_write(ctx, REG_TPI_INFO_FSEL, BIT_TPI_INFO_FSEL_EN
| BIT_TPI_INFO_FSEL_RPT | VAL_TPI_INFO_FSEL_VSI);
ret = mhl3_infoframe_init(&mhl_frm);
if (!ret)
ret = mhl3_infoframe_pack(&mhl_frm, buf, ARRAY_SIZE(buf));
sii8620_write_buf(ctx, REG_TPI_INFO_B0, buf, ret);
}
static void sii8620_start_video(struct sii8620 *ctx)
{
if (!sii8620_is_mhl3(ctx))
sii8620_stop_video(ctx);
if (ctx->sink_type == SINK_DVI && !sii8620_is_mhl3(ctx)) {
sii8620_write(ctx, REG_RX_HDMI_CTRL2,
VAL_RX_HDMI_CTRL2_DEFVAL);
sii8620_write(ctx, REG_TPI_SC, 0);
return;
}
sii8620_write_seq_static(ctx,
REG_RX_HDMI_CTRL2, VAL_RX_HDMI_CTRL2_DEFVAL
| BIT_RX_HDMI_CTRL2_USE_AV_MUTE,
REG_VID_OVRRD, BIT_VID_OVRRD_PP_AUTO_DISABLE
| BIT_VID_OVRRD_M1080P_OVRRD);
sii8620_set_format(ctx);
if (!sii8620_is_mhl3(ctx)) {
sii8620_mt_write_stat(ctx, MHL_DST_REG(LINK_MODE),
MHL_DST_LM_CLK_MODE_NORMAL | MHL_DST_LM_PATH_ENABLED);
sii8620_set_auto_zone(ctx);
} else {
static const struct {
int max_clk;
u8 zone;
u8 link_rate;
u8 rrp_decode;
} clk_spec[] = {
{ 150000, VAL_TX_ZONE_CTL3_TX_ZONE_1_5GBPS,
MHL_XDS_LINK_RATE_1_5_GBPS, 0x38 },
{ 300000, VAL_TX_ZONE_CTL3_TX_ZONE_3GBPS,
MHL_XDS_LINK_RATE_3_0_GBPS, 0x40 },
{ 600000, VAL_TX_ZONE_CTL3_TX_ZONE_6GBPS,
MHL_XDS_LINK_RATE_6_0_GBPS, 0x40 },
};
u8 p0_ctrl = BIT_M3_P0CTRL_MHL3_P0_PORT_EN;
int clk = ctx->pixel_clock * (ctx->use_packed_pixel ? 2 : 3);
int i;
for (i = 0; i < ARRAY_SIZE(clk_spec) - 1; ++i)
if (clk < clk_spec[i].max_clk)
break;
if (100 * clk >= 98 * clk_spec[i].max_clk)
p0_ctrl |= BIT_M3_P0CTRL_MHL3_P0_UNLIMIT_EN;
sii8620_burst_tx_bits_per_pixel_fmt(ctx, ctx->use_packed_pixel);
sii8620_burst_send(ctx);
sii8620_write_seq(ctx,
REG_MHL_DP_CTL0, 0xf0,
REG_MHL3_TX_ZONE_CTL, clk_spec[i].zone);
sii8620_setbits(ctx, REG_M3_P0CTRL,
BIT_M3_P0CTRL_MHL3_P0_PORT_EN
| BIT_M3_P0CTRL_MHL3_P0_UNLIMIT_EN, p0_ctrl);
sii8620_setbits(ctx, REG_M3_POSTM, MSK_M3_POSTM_RRP_DECODE,
clk_spec[i].rrp_decode);
sii8620_write_seq_static(ctx,
REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE
| BIT_M3_CTRL_H2M_SWRST,
REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE
);
sii8620_mt_write_stat(ctx, MHL_XDS_REG(AVLINK_MODE_CONTROL),
clk_spec[i].link_rate);
}
sii8620_set_infoframes(ctx);
}
static void sii8620_disable_hpd(struct sii8620 *ctx)
{
sii8620_setbits(ctx, REG_EDID_CTRL, BIT_EDID_CTRL_EDID_PRIME_VALID, 0);
sii8620_write_seq_static(ctx,
REG_HPD_CTRL, BIT_HPD_CTRL_HPD_OUT_OVR_EN,
REG_INTR8_MASK, 0
);
}
static void sii8620_enable_hpd(struct sii8620 *ctx)
{
sii8620_setbits(ctx, REG_TMDS_CSTAT_P3,
BIT_TMDS_CSTAT_P3_SCDT_CLR_AVI_DIS
| BIT_TMDS_CSTAT_P3_CLR_AVI, ~0);
sii8620_write_seq_static(ctx,
REG_HPD_CTRL, BIT_HPD_CTRL_HPD_OUT_OVR_EN
| BIT_HPD_CTRL_HPD_HIGH,
);
}
static void sii8620_mhl_discover(struct sii8620 *ctx)
{
sii8620_write_seq_static(ctx,
REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
| BIT_DISC_CTRL9_DISC_PULSE_PROCEED,
REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_5K, VAL_PUP_20K),
REG_CBUS_DISC_INTR0_MASK, BIT_MHL3_EST_INT
| BIT_MHL_EST_INT
| BIT_NOT_MHL_EST_INT
| BIT_CBUS_MHL3_DISCON_INT
| BIT_CBUS_MHL12_DISCON_INT
| BIT_RGND_READY_INT,
REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
| BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL
| BIT_MHL_PLL_CTL0_ZONE_MASK_OE,
REG_MHL_DP_CTL0, BIT_MHL_DP_CTL0_DP_OE
| BIT_MHL_DP_CTL0_TX_OE_OVR,
REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE,
REG_MHL_DP_CTL1, 0xA2,
REG_MHL_DP_CTL2, 0x03,
REG_MHL_DP_CTL3, 0x35,
REG_MHL_DP_CTL5, 0x02,
REG_MHL_DP_CTL6, 0x02,
REG_MHL_DP_CTL7, 0x03,
REG_COC_CTLC, 0xFF,
REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12
| BIT_DPD_OSC_EN | BIT_DPD_PWRON_HSIC,
REG_COC_INTR_MASK, BIT_COC_PLL_LOCK_STATUS_CHANGE
| BIT_COC_CALIBRATION_DONE,
REG_CBUS_INT_1_MASK, BIT_CBUS_MSC_ABORT_RCVD
| BIT_CBUS_CMD_ABORT,
REG_CBUS_INT_0_MASK, BIT_CBUS_MSC_MT_DONE
| BIT_CBUS_HPD_CHG
| BIT_CBUS_MSC_MR_WRITE_STAT
| BIT_CBUS_MSC_MR_MSC_MSG
| BIT_CBUS_MSC_MR_WRITE_BURST
| BIT_CBUS_MSC_MR_SET_INT
| BIT_CBUS_MSC_MT_DONE_NACK
);
}
static void sii8620_peer_specific_init(struct sii8620 *ctx)
{
if (sii8620_is_mhl3(ctx))
sii8620_write_seq_static(ctx,
REG_SYS_CTRL1, BIT_SYS_CTRL1_BLOCK_DDC_BY_HPD,
REG_EMSCINTRMASK1,
BIT_EMSCINTR1_EMSC_TRAINING_COMMA_ERR
);
else
sii8620_write_seq_static(ctx,
REG_HDCP2X_INTR0_MASK, 0x00,
REG_EMSCINTRMASK1, 0x00,
REG_HDCP2X_INTR0, 0xFF,
REG_INTR1, 0xFF,
REG_SYS_CTRL1, BIT_SYS_CTRL1_BLOCK_DDC_BY_HPD
| BIT_SYS_CTRL1_TX_CTRL_HDMI
);
}
#define SII8620_MHL_VERSION 0x32
#define SII8620_SCRATCHPAD_SIZE 16
#define SII8620_INT_STAT_SIZE 0x33
static void sii8620_set_dev_cap(struct sii8620 *ctx)
{
static const u8 devcap[MHL_DCAP_SIZE] = {
[MHL_DCAP_MHL_VERSION] = SII8620_MHL_VERSION,
[MHL_DCAP_CAT] = MHL_DCAP_CAT_SOURCE | MHL_DCAP_CAT_POWER,
[MHL_DCAP_ADOPTER_ID_H] = 0x01,
[MHL_DCAP_ADOPTER_ID_L] = 0x41,
[MHL_DCAP_VID_LINK_MODE] = MHL_DCAP_VID_LINK_RGB444
| MHL_DCAP_VID_LINK_PPIXEL
| MHL_DCAP_VID_LINK_16BPP,
[MHL_DCAP_AUD_LINK_MODE] = MHL_DCAP_AUD_LINK_2CH,
[MHL_DCAP_VIDEO_TYPE] = MHL_DCAP_VT_GRAPHICS,
[MHL_DCAP_LOG_DEV_MAP] = MHL_DCAP_LD_GUI,
[MHL_DCAP_BANDWIDTH] = 0x0f,
[MHL_DCAP_FEATURE_FLAG] = MHL_DCAP_FEATURE_RCP_SUPPORT
| MHL_DCAP_FEATURE_RAP_SUPPORT
| MHL_DCAP_FEATURE_SP_SUPPORT,
[MHL_DCAP_SCRATCHPAD_SIZE] = SII8620_SCRATCHPAD_SIZE,
[MHL_DCAP_INT_STAT_SIZE] = SII8620_INT_STAT_SIZE,
};
static const u8 xdcap[MHL_XDC_SIZE] = {
[MHL_XDC_ECBUS_SPEEDS] = MHL_XDC_ECBUS_S_075
| MHL_XDC_ECBUS_S_8BIT,
[MHL_XDC_TMDS_SPEEDS] = MHL_XDC_TMDS_150
| MHL_XDC_TMDS_300 | MHL_XDC_TMDS_600,
[MHL_XDC_ECBUS_ROLES] = MHL_XDC_DEV_HOST,
[MHL_XDC_LOG_DEV_MAPX] = MHL_XDC_LD_PHONE,
};
sii8620_write_buf(ctx, REG_MHL_DEVCAP_0, devcap, ARRAY_SIZE(devcap));
sii8620_write_buf(ctx, REG_MHL_EXTDEVCAP_0, xdcap, ARRAY_SIZE(xdcap));
}
static void sii8620_mhl_init(struct sii8620 *ctx)
{
sii8620_write_seq_static(ctx,
REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K),
REG_CBUS_MSC_COMPAT_CTRL,
BIT_CBUS_MSC_COMPAT_CTRL_XDEVCAP_EN,
);
sii8620_peer_specific_init(ctx);
sii8620_disable_hpd(ctx);
sii8620_write_seq_static(ctx,
REG_EDID_CTRL, BIT_EDID_CTRL_EDID_FIFO_ADDR_AUTO,
REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
| BIT_DISC_CTRL9_WAKE_PULSE_BYPASS,
REG_TMDS0_CCTRL1, 0x90,
REG_TMDS_CLK_EN, 0x01,
REG_TMDS_CH_EN, 0x11,
REG_BGR_BIAS, 0x87,
REG_ALICE0_ZONE_CTRL, 0xE8,
REG_ALICE0_MODE_CTRL, 0x04,
);
sii8620_setbits(ctx, REG_LM_DDC, BIT_LM_DDC_SW_TPI_EN_DISABLED, 0);
sii8620_write_seq_static(ctx,
REG_TPI_HW_OPT3, 0x76,
REG_TMDS_CCTRL, BIT_TMDS_CCTRL_TMDS_OE,
REG_TPI_DTD_B2, 79,
);
sii8620_set_dev_cap(ctx);
sii8620_write_seq_static(ctx,
REG_MDT_XMIT_TIMEOUT, 100,
REG_MDT_XMIT_CTRL, 0x03,
REG_MDT_XFIFO_STAT, 0x00,
REG_MDT_RCV_TIMEOUT, 100,
REG_CBUS_LINK_CTRL_8, 0x1D,
);
sii8620_start_gen2_write_burst(ctx);
sii8620_write_seq_static(ctx,
REG_BIST_CTRL, 0x00,
REG_COC_CTL1, 0x10,
REG_COC_CTL2, 0x18,
REG_COC_CTLF, 0x07,
REG_COC_CTL11, 0xF8,
REG_COC_CTL17, 0x61,
REG_COC_CTL18, 0x46,
REG_COC_CTL19, 0x15,
REG_COC_CTL1A, 0x01,
REG_MHL_COC_CTL3, BIT_MHL_COC_CTL3_COC_AECHO_EN,
REG_MHL_COC_CTL4, 0x2D,
REG_MHL_COC_CTL5, 0xF9,
REG_MSC_HEARTBEAT_CTRL, 0x27,
);
sii8620_disable_gen2_write_burst(ctx);
sii8620_mt_write_stat(ctx, MHL_DST_REG(VERSION), SII8620_MHL_VERSION);
sii8620_mt_write_stat(ctx, MHL_DST_REG(CONNECTED_RDY),
MHL_DST_CONN_DCAP_RDY | MHL_DST_CONN_XDEVCAPP_SUPP
| MHL_DST_CONN_POW_STAT);
sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE), MHL_INT_RC_DCAP_CHG);
}
static void sii8620_emsc_enable(struct sii8620 *ctx)
{
u8 reg;
sii8620_setbits(ctx, REG_GENCTL, BIT_GENCTL_EMSC_EN
| BIT_GENCTL_CLR_EMSC_RFIFO
| BIT_GENCTL_CLR_EMSC_XFIFO, ~0);
sii8620_setbits(ctx, REG_GENCTL, BIT_GENCTL_CLR_EMSC_RFIFO
| BIT_GENCTL_CLR_EMSC_XFIFO, 0);
sii8620_setbits(ctx, REG_COMMECNT, BIT_COMMECNT_I2C_TO_EMSC_EN, ~0);
reg = sii8620_readb(ctx, REG_EMSCINTR);
sii8620_write(ctx, REG_EMSCINTR, reg);
sii8620_write(ctx, REG_EMSCINTRMASK, BIT_EMSCINTR_SPI_DVLD);
}
static int sii8620_wait_for_fsm_state(struct sii8620 *ctx, u8 state)
{
int i;
for (i = 0; i < 10; ++i) {
u8 s = sii8620_readb(ctx, REG_COC_STAT_0);
if ((s & MSK_COC_STAT_0_FSM_STATE) == state)
return 0;
if (!(s & BIT_COC_STAT_0_PLL_LOCKED))
return -EBUSY;
usleep_range(4000, 6000);
}
return -ETIMEDOUT;
}
static void sii8620_set_mode(struct sii8620 *ctx, enum sii8620_mode mode)
{
int ret;
if (ctx->mode == mode)
return;
switch (mode) {
case CM_MHL1:
sii8620_write_seq_static(ctx,
REG_CBUS_MSC_COMPAT_CTRL, 0x02,
REG_M3_CTRL, VAL_M3_CTRL_MHL1_2_VALUE,
REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12
| BIT_DPD_OSC_EN,
REG_COC_INTR_MASK, 0
);
ctx->mode = mode;
break;
case CM_MHL3:
sii8620_write(ctx, REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE);
ctx->mode = mode;
return;
case CM_ECBUS_S:
sii8620_emsc_enable(ctx);
sii8620_write_seq_static(ctx,
REG_TTXSPINUMS, 4,
REG_TRXSPINUMS, 4,
REG_TTXHSICNUMS, 0x14,
REG_TRXHSICNUMS, 0x14,
REG_TTXTOTNUMS, 0x18,
REG_TRXTOTNUMS, 0x18,
REG_PWD_SRST, BIT_PWD_SRST_COC_DOC_RST
| BIT_PWD_SRST_CBUS_RST_SW_EN,
REG_MHL_COC_CTL1, 0xbd,
REG_PWD_SRST, BIT_PWD_SRST_CBUS_RST_SW_EN,
REG_COC_CTLB, 0x01,
REG_COC_CTL0, 0x5c,
REG_COC_CTL14, 0x03,
REG_COC_CTL15, 0x80,
REG_MHL_DP_CTL6, BIT_MHL_DP_CTL6_DP_TAP1_SGN
| BIT_MHL_DP_CTL6_DP_TAP1_EN
| BIT_MHL_DP_CTL6_DT_PREDRV_FEEDCAP_EN,
REG_MHL_DP_CTL8, 0x03
);
ret = sii8620_wait_for_fsm_state(ctx, 0x03);
sii8620_write_seq_static(ctx,
REG_COC_CTL14, 0x00,
REG_COC_CTL15, 0x80
);
if (!ret)
sii8620_write(ctx, REG_CBUS3_CNVT, 0x85);
else
sii8620_disconnect(ctx);
return;
case CM_DISCONNECTED:
ctx->mode = mode;
break;
default:
dev_err(ctx->dev, "%s mode %d not supported\n", __func__, mode);
break;
}
sii8620_set_auto_zone(ctx);
if (mode != CM_MHL1)
return;
sii8620_write_seq_static(ctx,
REG_MHL_DP_CTL0, 0xBC,
REG_MHL_DP_CTL1, 0xBB,
REG_MHL_DP_CTL3, 0x48,
REG_MHL_DP_CTL5, 0x39,
REG_MHL_DP_CTL2, 0x2A,
REG_MHL_DP_CTL6, 0x2A,
REG_MHL_DP_CTL7, 0x08
);
}
static void sii8620_disconnect(struct sii8620 *ctx)
{
sii8620_disable_gen2_write_burst(ctx);
sii8620_stop_video(ctx);
msleep(100);
sii8620_cbus_reset(ctx);
sii8620_set_mode(ctx, CM_DISCONNECTED);
sii8620_write_seq_static(ctx,
REG_TX_ZONE_CTL1, 0,
REG_MHL_PLL_CTL0, 0x07,
REG_COC_CTL0, 0x40,
REG_CBUS3_CNVT, 0x84,
REG_COC_CTL14, 0x00,
REG_COC_CTL0, 0x40,
REG_HRXCTRL3, 0x07,
REG_MHL_PLL_CTL0, VAL_MHL_PLL_CTL0_HDMI_CLK_RATIO_1X
| BIT_MHL_PLL_CTL0_CRYSTAL_CLK_SEL
| BIT_MHL_PLL_CTL0_ZONE_MASK_OE,
REG_MHL_DP_CTL0, BIT_MHL_DP_CTL0_DP_OE
| BIT_MHL_DP_CTL0_TX_OE_OVR,
REG_MHL_DP_CTL1, 0xBB,
REG_MHL_DP_CTL3, 0x48,
REG_MHL_DP_CTL5, 0x3F,
REG_MHL_DP_CTL2, 0x2F,
REG_MHL_DP_CTL6, 0x2A,
REG_MHL_DP_CTL7, 0x03
);
sii8620_disable_hpd(ctx);
sii8620_write_seq_static(ctx,
REG_M3_CTRL, VAL_M3_CTRL_MHL3_VALUE,
REG_MHL_COC_CTL1, 0x07,
REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K),
REG_DISC_CTRL8, 0x00,
REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
| BIT_DISC_CTRL9_WAKE_PULSE_BYPASS,
REG_INT_CTRL, 0x00,
REG_MSC_HEARTBEAT_CTRL, 0x27,
REG_DISC_CTRL1, 0x25,
REG_CBUS_DISC_INTR0, (u8)~BIT_RGND_READY_INT,
REG_CBUS_DISC_INTR0_MASK, BIT_RGND_READY_INT,
REG_MDT_INT_1, 0xff,
REG_MDT_INT_1_MASK, 0x00,
REG_MDT_INT_0, 0xff,
REG_MDT_INT_0_MASK, 0x00,
REG_COC_INTR, 0xff,
REG_COC_INTR_MASK, 0x00,
REG_TRXINTH, 0xff,
REG_TRXINTMH, 0x00,
REG_CBUS_INT_0, 0xff,
REG_CBUS_INT_0_MASK, 0x00,
REG_CBUS_INT_1, 0xff,
REG_CBUS_INT_1_MASK, 0x00,
REG_EMSCINTR, 0xff,
REG_EMSCINTRMASK, 0x00,
REG_EMSCINTR1, 0xff,
REG_EMSCINTRMASK1, 0x00,
REG_INTR8, 0xff,
REG_INTR8_MASK, 0x00,
REG_TPI_INTR_ST0, 0xff,
REG_TPI_INTR_EN, 0x00,
REG_HDCP2X_INTR0, 0xff,
REG_HDCP2X_INTR0_MASK, 0x00,
REG_INTR9, 0xff,
REG_INTR9_MASK, 0x00,
REG_INTR3, 0xff,
REG_INTR3_MASK, 0x00,
REG_INTR5, 0xff,
REG_INTR5_MASK, 0x00,
REG_INTR2, 0xff,
REG_INTR2_MASK, 0x00,
);
memset(ctx->stat, 0, sizeof(ctx->stat));
memset(ctx->xstat, 0, sizeof(ctx->xstat));
memset(ctx->devcap, 0, sizeof(ctx->devcap));
memset(ctx->xdevcap, 0, sizeof(ctx->xdevcap));
ctx->cbus_status = 0;
ctx->sink_type = SINK_NONE;
kfree(ctx->edid);
ctx->edid = NULL;
sii8620_mt_cleanup(ctx);
}
static void sii8620_mhl_disconnected(struct sii8620 *ctx)
{
sii8620_write_seq_static(ctx,
REG_DISC_CTRL4, VAL_DISC_CTRL4(VAL_PUP_OFF, VAL_PUP_20K),
REG_CBUS_MSC_COMPAT_CTRL,
BIT_CBUS_MSC_COMPAT_CTRL_XDEVCAP_EN
);
sii8620_disconnect(ctx);
}
static void sii8620_irq_disc(struct sii8620 *ctx)
{
u8 stat = sii8620_readb(ctx, REG_CBUS_DISC_INTR0);
if (stat & VAL_CBUS_MHL_DISCON)
sii8620_mhl_disconnected(ctx);
if (stat & BIT_RGND_READY_INT) {
u8 stat2 = sii8620_readb(ctx, REG_DISC_STAT2);
if ((stat2 & MSK_DISC_STAT2_RGND) == VAL_RGND_1K) {
sii8620_mhl_discover(ctx);
} else {
sii8620_write_seq_static(ctx,
REG_DISC_CTRL9, BIT_DISC_CTRL9_WAKE_DRVFLT
| BIT_DISC_CTRL9_NOMHL_EST
| BIT_DISC_CTRL9_WAKE_PULSE_BYPASS,
REG_CBUS_DISC_INTR0_MASK, BIT_RGND_READY_INT
| BIT_CBUS_MHL3_DISCON_INT
| BIT_CBUS_MHL12_DISCON_INT
| BIT_NOT_MHL_EST_INT
);
}
}
if (stat & BIT_MHL_EST_INT)
sii8620_mhl_init(ctx);
sii8620_write(ctx, REG_CBUS_DISC_INTR0, stat);
}
static void sii8620_read_burst(struct sii8620 *ctx)
{
u8 buf[17];
sii8620_read_buf(ctx, REG_MDT_RCV_READ_PORT, buf, ARRAY_SIZE(buf));
sii8620_write(ctx, REG_MDT_RCV_CTRL, BIT_MDT_RCV_CTRL_MDT_RCV_EN |
BIT_MDT_RCV_CTRL_MDT_DELAY_RCV_EN |
BIT_MDT_RCV_CTRL_MDT_RFIFO_CLR_CUR);
sii8620_readb(ctx, REG_MDT_RFIFO_STAT);
}
static void sii8620_irq_g2wb(struct sii8620 *ctx)
{
u8 stat = sii8620_readb(ctx, REG_MDT_INT_0);
if (stat & BIT_MDT_IDLE_AFTER_HAWB_DISABLE)
if (sii8620_is_mhl3(ctx))
sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE),
MHL_INT_RC_FEAT_COMPLETE);
if (stat & BIT_MDT_RFIFO_DATA_RDY)
sii8620_read_burst(ctx);
if (stat & BIT_MDT_XFIFO_EMPTY)
sii8620_write(ctx, REG_MDT_XMIT_CTRL, 0);
sii8620_write(ctx, REG_MDT_INT_0, stat);
}
static void sii8620_status_dcap_ready(struct sii8620 *ctx)
{
enum sii8620_mode mode;
mode = ctx->stat[MHL_DST_VERSION] >= 0x30 ? CM_MHL3 : CM_MHL1;
if (mode > ctx->mode)
sii8620_set_mode(ctx, mode);
sii8620_peer_specific_init(ctx);
sii8620_write(ctx, REG_INTR9_MASK, BIT_INTR9_DEVCAP_DONE
| BIT_INTR9_EDID_DONE | BIT_INTR9_EDID_ERROR);
}
static void sii8620_status_changed_path(struct sii8620 *ctx)
{
if (ctx->stat[MHL_DST_LINK_MODE] & MHL_DST_LM_PATH_ENABLED) {
sii8620_mt_write_stat(ctx, MHL_DST_REG(LINK_MODE),
MHL_DST_LM_CLK_MODE_NORMAL
| MHL_DST_LM_PATH_ENABLED);
if (!sii8620_is_mhl3(ctx))
sii8620_mt_read_devcap(ctx, false);
sii8620_mt_set_cont(ctx, sii8620_sink_detected);
} else {
sii8620_mt_write_stat(ctx, MHL_DST_REG(LINK_MODE),
MHL_DST_LM_CLK_MODE_NORMAL);
}
}
static void sii8620_msc_mr_write_stat(struct sii8620 *ctx)
{
u8 st[MHL_DST_SIZE], xst[MHL_XDS_SIZE];
sii8620_read_buf(ctx, REG_MHL_STAT_0, st, MHL_DST_SIZE);
sii8620_read_buf(ctx, REG_MHL_EXTSTAT_0, xst, MHL_XDS_SIZE);
sii8620_update_array(ctx->stat, st, MHL_DST_SIZE);
sii8620_update_array(ctx->xstat, xst, MHL_XDS_SIZE);
if (ctx->stat[MHL_DST_CONNECTED_RDY] & MHL_DST_CONN_DCAP_RDY)
sii8620_status_dcap_ready(ctx);
if (st[MHL_DST_LINK_MODE] & MHL_DST_LM_PATH_ENABLED)
sii8620_status_changed_path(ctx);
}
static void sii8620_ecbus_up(struct sii8620 *ctx, int ret)
{
if (ret < 0)
return;
sii8620_set_mode(ctx, CM_ECBUS_S);
}
static void sii8620_got_ecbus_speed(struct sii8620 *ctx, int ret)
{
if (ret < 0)
return;
sii8620_mt_write_stat(ctx, MHL_XDS_REG(CURR_ECBUS_MODE),
MHL_XDS_ECBUS_S | MHL_XDS_SLOT_MODE_8BIT);
sii8620_mt_rap(ctx, MHL_RAP_CBUS_MODE_UP);
sii8620_mt_set_cont(ctx, sii8620_ecbus_up);
}
static void sii8620_mhl_burst_emsc_support_set(struct mhl_burst_emsc_support *d,
enum mhl_burst_id id)
{
sii8620_mhl_burst_hdr_set(&d->hdr, MHL_BURST_ID_EMSC_SUPPORT);
d->num_entries = 1;
d->burst_id[0] = cpu_to_be16(id);
}
static void sii8620_send_features(struct sii8620 *ctx)
{
u8 buf[16];
sii8620_write(ctx, REG_MDT_XMIT_CTRL, BIT_MDT_XMIT_CTRL_EN
| BIT_MDT_XMIT_CTRL_FIXED_BURST_LEN);
sii8620_mhl_burst_emsc_support_set((void *)buf,
MHL_BURST_ID_HID_PAYLOAD);
sii8620_write_buf(ctx, REG_MDT_XMIT_WRITE_PORT, buf, ARRAY_SIZE(buf));
}
static bool sii8620_rcp_consume(struct sii8620 *ctx, u8 scancode)
{
bool pressed = !(scancode & MHL_RCP_KEY_RELEASED_MASK);
scancode &= MHL_RCP_KEY_ID_MASK;
if (!ctx->rc_dev) {
dev_dbg(ctx->dev, "RCP input device not initialized\n");
return false;
}
if (pressed)
rc_keydown(ctx->rc_dev, RC_PROTO_CEC, scancode, 0);
else
rc_keyup(ctx->rc_dev);
return true;
}
static void sii8620_msc_mr_set_int(struct sii8620 *ctx)
{
u8 ints[MHL_INT_SIZE];
sii8620_read_buf(ctx, REG_MHL_INT_0, ints, MHL_INT_SIZE);
sii8620_write_buf(ctx, REG_MHL_INT_0, ints, MHL_INT_SIZE);
if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_DCAP_CHG) {
switch (ctx->mode) {
case CM_MHL3:
sii8620_mt_read_xdevcap_reg(ctx, MHL_XDC_ECBUS_SPEEDS);
sii8620_mt_set_cont(ctx, sii8620_got_ecbus_speed);
break;
case CM_ECBUS_S:
sii8620_mt_read_devcap(ctx, true);
break;
default:
break;
}
}
if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_REQ)
sii8620_send_features(ctx);
if (ints[MHL_INT_RCHANGE] & MHL_INT_RC_FEAT_COMPLETE)
sii8620_edid_read(ctx, 0);
}
static struct sii8620_mt_msg *sii8620_msc_msg_first(struct sii8620 *ctx)
{
struct device *dev = ctx->dev;
if (list_empty(&ctx->mt_queue)) {
dev_err(dev, "unexpected MSC MT response\n");
return NULL;
}
return list_first_entry(&ctx->mt_queue, struct sii8620_mt_msg, node);
}
static void sii8620_msc_mt_done(struct sii8620 *ctx)
{
struct sii8620_mt_msg *msg = sii8620_msc_msg_first(ctx);
if (!msg)
return;
msg->ret = sii8620_readb(ctx, REG_MSC_MT_RCVD_DATA0);
ctx->mt_state = MT_STATE_DONE;
}
static void sii8620_msc_mr_msc_msg(struct sii8620 *ctx)
{
struct sii8620_mt_msg *msg;
u8 buf[2];
sii8620_read_buf(ctx, REG_MSC_MR_MSC_MSG_RCVD_1ST_DATA, buf, 2);
switch (buf[0]) {
case MHL_MSC_MSG_RAPK:
msg = sii8620_msc_msg_first(ctx);
if (!msg)
return;
msg->ret = buf[1];
ctx->mt_state = MT_STATE_DONE;
break;
case MHL_MSC_MSG_RCP:
if (!sii8620_rcp_consume(ctx, buf[1]))
sii8620_mt_rcpe(ctx,
MHL_RCPE_STATUS_INEFFECTIVE_KEY_CODE);
sii8620_mt_rcpk(ctx, buf[1]);
break;
default:
dev_err(ctx->dev, "%s message type %d,%d not supported",
__func__, buf[0], buf[1]);
}
}
static void sii8620_irq_msc(struct sii8620 *ctx)
{
u8 stat = sii8620_readb(ctx, REG_CBUS_INT_0);
if (stat & ~BIT_CBUS_HPD_CHG)
sii8620_write(ctx, REG_CBUS_INT_0, stat & ~BIT_CBUS_HPD_CHG);
if (stat & BIT_CBUS_HPD_CHG) {
u8 cbus_stat = sii8620_readb(ctx, REG_CBUS_STATUS);
if ((cbus_stat ^ ctx->cbus_status) & BIT_CBUS_STATUS_CBUS_HPD) {
sii8620_write(ctx, REG_CBUS_INT_0, BIT_CBUS_HPD_CHG);
} else {
stat ^= BIT_CBUS_STATUS_CBUS_HPD;
cbus_stat ^= BIT_CBUS_STATUS_CBUS_HPD;
}
ctx->cbus_status = cbus_stat;
}
if (stat & BIT_CBUS_MSC_MR_WRITE_STAT)
sii8620_msc_mr_write_stat(ctx);
if (stat & BIT_CBUS_MSC_MR_SET_INT)
sii8620_msc_mr_set_int(ctx);
if (stat & BIT_CBUS_MSC_MT_DONE)
sii8620_msc_mt_done(ctx);
if (stat & BIT_CBUS_MSC_MR_MSC_MSG)
sii8620_msc_mr_msc_msg(ctx);
}
static void sii8620_irq_coc(struct sii8620 *ctx)
{
u8 stat = sii8620_readb(ctx, REG_COC_INTR);
if (stat & BIT_COC_CALIBRATION_DONE) {
u8 cstat = sii8620_readb(ctx, REG_COC_STAT_0);
cstat &= BIT_COC_STAT_0_PLL_LOCKED | MSK_COC_STAT_0_FSM_STATE;
if (cstat == (BIT_COC_STAT_0_PLL_LOCKED | 0x02)) {
sii8620_write_seq_static(ctx,
REG_COC_CTLB, 0,
REG_TRXINTMH, BIT_TDM_INTR_SYNC_DATA
| BIT_TDM_INTR_SYNC_WAIT
);
}
}
sii8620_write(ctx, REG_COC_INTR, stat);
}
static void sii8620_irq_merr(struct sii8620 *ctx)
{
u8 stat = sii8620_readb(ctx, REG_CBUS_INT_1);
sii8620_write(ctx, REG_CBUS_INT_1, stat);
}
static void sii8620_irq_edid(struct sii8620 *ctx)
{
u8 stat = sii8620_readb(ctx, REG_INTR9);
sii8620_write(ctx, REG_INTR9, stat);
if (stat & BIT_INTR9_DEVCAP_DONE)
ctx->mt_state = MT_STATE_DONE;
}
static void sii8620_irq_scdt(struct sii8620 *ctx)
{
u8 stat = sii8620_readb(ctx, REG_INTR5);
if (stat & BIT_INTR_SCDT_CHANGE) {
u8 cstat = sii8620_readb(ctx, REG_TMDS_CSTAT_P3);
if (cstat & BIT_TMDS_CSTAT_P3_SCDT)
sii8620_start_video(ctx);
}
sii8620_write(ctx, REG_INTR5, stat);
}
static void sii8620_got_xdevcap(struct sii8620 *ctx, int ret)
{
if (ret < 0)
return;
sii8620_mt_read_devcap(ctx, false);
}
static void sii8620_irq_tdm(struct sii8620 *ctx)
{
u8 stat = sii8620_readb(ctx, REG_TRXINTH);
u8 tdm = sii8620_readb(ctx, REG_TRXSTA2);
if ((tdm & MSK_TDM_SYNCHRONIZED) == VAL_TDM_SYNCHRONIZED) {
ctx->mode = CM_ECBUS_S;
ctx->burst.rx_ack = 0;
ctx->burst.r_size = SII8620_BURST_BUF_LEN;
sii8620_burst_tx_rbuf_info(ctx, SII8620_BURST_BUF_LEN);
sii8620_mt_read_devcap(ctx, true);
sii8620_mt_set_cont(ctx, sii8620_got_xdevcap);
} else {
sii8620_write_seq_static(ctx,
REG_MHL_PLL_CTL2, 0,
REG_MHL_PLL_CTL2, BIT_MHL_PLL_CTL2_CLKDETECT_EN
);
}
sii8620_write(ctx, REG_TRXINTH, stat);
}
static void sii8620_irq_block(struct sii8620 *ctx)
{
u8 stat = sii8620_readb(ctx, REG_EMSCINTR);
if (stat & BIT_EMSCINTR_SPI_DVLD) {
u8 bstat = sii8620_readb(ctx, REG_SPIBURSTSTAT);
if (bstat & BIT_SPIBURSTSTAT_EMSC_NORMAL_MODE)
sii8620_burst_receive(ctx);
}
sii8620_write(ctx, REG_EMSCINTR, stat);
}
static void sii8620_irq_ddc(struct sii8620 *ctx)
{
u8 stat = sii8620_readb(ctx, REG_INTR3);
if (stat & BIT_DDC_CMD_DONE) {
sii8620_write(ctx, REG_INTR3_MASK, 0);
if (sii8620_is_mhl3(ctx))
sii8620_mt_set_int(ctx, MHL_INT_REG(RCHANGE),
MHL_INT_RC_FEAT_REQ);
else
sii8620_edid_read(ctx, 0);
}
sii8620_write(ctx, REG_INTR3, stat);
}
/* endian agnostic, non-volatile version of test_bit */
static bool sii8620_test_bit(unsigned int nr, const u8 *addr)
{
return 1 & (addr[nr / BITS_PER_BYTE] >> (nr % BITS_PER_BYTE));
}
static irqreturn_t sii8620_irq_thread(int irq, void *data)
{
static const struct {
int bit;
void (*handler)(struct sii8620 *ctx);
} irq_vec[] = {
{ BIT_FAST_INTR_STAT_DISC, sii8620_irq_disc },
{ BIT_FAST_INTR_STAT_G2WB, sii8620_irq_g2wb },
{ BIT_FAST_INTR_STAT_COC, sii8620_irq_coc },
{ BIT_FAST_INTR_STAT_TDM, sii8620_irq_tdm },
{ BIT_FAST_INTR_STAT_MSC, sii8620_irq_msc },
{ BIT_FAST_INTR_STAT_MERR, sii8620_irq_merr },
{ BIT_FAST_INTR_STAT_BLOCK, sii8620_irq_block },
{ BIT_FAST_INTR_STAT_EDID, sii8620_irq_edid },
{ BIT_FAST_INTR_STAT_DDC, sii8620_irq_ddc },
{ BIT_FAST_INTR_STAT_SCDT, sii8620_irq_scdt },
};
struct sii8620 *ctx = data;
u8 stats[LEN_FAST_INTR_STAT];
int i, ret;
mutex_lock(&ctx->lock);
sii8620_read_buf(ctx, REG_FAST_INTR_STAT, stats, ARRAY_SIZE(stats));
for (i = 0; i < ARRAY_SIZE(irq_vec); ++i)
if (sii8620_test_bit(irq_vec[i].bit, stats))
irq_vec[i].handler(ctx);
sii8620_burst_rx_all(ctx);
sii8620_mt_work(ctx);
sii8620_burst_send(ctx);
ret = sii8620_clear_error(ctx);
if (ret) {
dev_err(ctx->dev, "Error during IRQ handling, %d.\n", ret);
sii8620_mhl_disconnected(ctx);
}
mutex_unlock(&ctx->lock);
return IRQ_HANDLED;
}
static void sii8620_cable_in(struct sii8620 *ctx)
{
struct device *dev = ctx->dev;
u8 ver[5];
int ret;
ret = sii8620_hw_on(ctx);
if (ret) {
dev_err(dev, "Error powering on, %d.\n", ret);
return;
}
sii8620_read_buf(ctx, REG_VND_IDL, ver, ARRAY_SIZE(ver));
ret = sii8620_clear_error(ctx);
if (ret) {
dev_err(dev, "Error accessing I2C bus, %d.\n", ret);
return;
}
dev_info(dev, "ChipID %02x%02x:%02x%02x rev %02x.\n", ver[1], ver[0],
ver[3], ver[2], ver[4]);
sii8620_write(ctx, REG_DPD,
BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12 | BIT_DPD_OSC_EN);
sii8620_xtal_set_rate(ctx);
sii8620_disconnect(ctx);
sii8620_write_seq_static(ctx,
REG_MHL_CBUS_CTL0, VAL_MHL_CBUS_CTL0_CBUS_DRV_SEL_STRONG
| VAL_MHL_CBUS_CTL0_CBUS_RGND_VBIAS_734,
REG_MHL_CBUS_CTL1, VAL_MHL_CBUS_CTL1_1115_OHM,
REG_DPD, BIT_DPD_PWRON_PLL | BIT_DPD_PDNTX12 | BIT_DPD_OSC_EN,
);
ret = sii8620_clear_error(ctx);
if (ret) {
dev_err(dev, "Error accessing I2C bus, %d.\n", ret);
return;
}
enable_irq(to_i2c_client(ctx->dev)->irq);
}
static void sii8620_init_rcp_input_dev(struct sii8620 *ctx)
{
struct rc_dev *rc_dev;
int ret;
rc_dev = rc_allocate_device(RC_DRIVER_SCANCODE);
if (!rc_dev) {
dev_err(ctx->dev, "Failed to allocate RC device\n");
ctx->error = -ENOMEM;
return;
}
rc_dev->input_phys = "sii8620/input0";
rc_dev->input_id.bustype = BUS_VIRTUAL;
rc_dev->map_name = RC_MAP_CEC;
rc_dev->allowed_protocols = RC_PROTO_BIT_CEC;
rc_dev->driver_name = "sii8620";
rc_dev->device_name = "sii8620";
ret = rc_register_device(rc_dev);
if (ret) {
dev_err(ctx->dev, "Failed to register RC device\n");
ctx->error = ret;
rc_free_device(ctx->rc_dev);
return;
}
ctx->rc_dev = rc_dev;
}
static void sii8620_cable_out(struct sii8620 *ctx)
{
disable_irq(to_i2c_client(ctx->dev)->irq);
sii8620_hw_off(ctx);
}
static void sii8620_extcon_work(struct work_struct *work)
{
struct sii8620 *ctx =
container_of(work, struct sii8620, extcon_wq);
int state = extcon_get_state(ctx->extcon, EXTCON_DISP_MHL);
if (state == ctx->cable_state)
return;
ctx->cable_state = state;
if (state > 0)
sii8620_cable_in(ctx);
else
sii8620_cable_out(ctx);
}
static int sii8620_extcon_notifier(struct notifier_block *self,
unsigned long event, void *ptr)
{
struct sii8620 *ctx =
container_of(self, struct sii8620, extcon_nb);
schedule_work(&ctx->extcon_wq);
return NOTIFY_DONE;
}
static int sii8620_extcon_init(struct sii8620 *ctx)
{
struct extcon_dev *edev;
struct device_node *musb, *muic;
int ret;
/* get micro-USB connector node */
musb = of_graph_get_remote_node(ctx->dev->of_node, 1, -1);
/* next get micro-USB Interface Controller node */
muic = of_get_next_parent(musb);
if (!muic) {
dev_info(ctx->dev, "no extcon found, switching to 'always on' mode\n");
return 0;
}
edev = extcon_find_edev_by_node(muic);
of_node_put(muic);
if (IS_ERR(edev)) {
if (PTR_ERR(edev) == -EPROBE_DEFER)
return -EPROBE_DEFER;
dev_err(ctx->dev, "Invalid or missing extcon\n");
return PTR_ERR(edev);
}
ctx->extcon = edev;
ctx->extcon_nb.notifier_call = sii8620_extcon_notifier;
INIT_WORK(&ctx->extcon_wq, sii8620_extcon_work);
ret = extcon_register_notifier(edev, EXTCON_DISP_MHL, &ctx->extcon_nb);
if (ret) {
dev_err(ctx->dev, "failed to register notifier for MHL\n");
return ret;
}
return 0;
}
static inline struct sii8620 *bridge_to_sii8620(struct drm_bridge *bridge)
{
return container_of(bridge, struct sii8620, bridge);
}
static int sii8620_attach(struct drm_bridge *bridge)
{
struct sii8620 *ctx = bridge_to_sii8620(bridge);
sii8620_init_rcp_input_dev(ctx);
return sii8620_clear_error(ctx);
}
static void sii8620_detach(struct drm_bridge *bridge)
{
struct sii8620 *ctx = bridge_to_sii8620(bridge);
rc_unregister_device(ctx->rc_dev);
}
static int sii8620_is_packing_required(struct sii8620 *ctx,
const struct drm_display_mode *mode)
{
int max_pclk, max_pclk_pp_mode;
if (sii8620_is_mhl3(ctx)) {
max_pclk = MHL3_MAX_PCLK;
max_pclk_pp_mode = MHL3_MAX_PCLK_PP_MODE;
} else {
max_pclk = MHL1_MAX_PCLK;
max_pclk_pp_mode = MHL1_MAX_PCLK_PP_MODE;
}
if (mode->clock < max_pclk)
return 0;
else if (mode->clock < max_pclk_pp_mode)
return 1;
else
return -1;
}
static enum drm_mode_status sii8620_mode_valid(struct drm_bridge *bridge,
const struct drm_display_mode *mode)
{
struct sii8620 *ctx = bridge_to_sii8620(bridge);
int pack_required = sii8620_is_packing_required(ctx, mode);
bool can_pack = ctx->devcap[MHL_DCAP_VID_LINK_MODE] &
MHL_DCAP_VID_LINK_PPIXEL;
switch (pack_required) {
case 0:
return MODE_OK;
case 1:
return (can_pack) ? MODE_OK : MODE_CLOCK_HIGH;
default:
return MODE_CLOCK_HIGH;
}
}
static bool sii8620_mode_fixup(struct drm_bridge *bridge,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct sii8620 *ctx = bridge_to_sii8620(bridge);
mutex_lock(&ctx->lock);
ctx->use_packed_pixel = sii8620_is_packing_required(ctx, adjusted_mode);
ctx->video_code = drm_match_cea_mode(adjusted_mode);
ctx->pixel_clock = adjusted_mode->clock;
mutex_unlock(&ctx->lock);
return true;
}
static const struct drm_bridge_funcs sii8620_bridge_funcs = {
.attach = sii8620_attach,
.detach = sii8620_detach,
.mode_fixup = sii8620_mode_fixup,
.mode_valid = sii8620_mode_valid,
};
static int sii8620_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct sii8620 *ctx;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->dev = dev;
mutex_init(&ctx->lock);
INIT_LIST_HEAD(&ctx->mt_queue);
ctx->clk_xtal = devm_clk_get(dev, "xtal");
if (IS_ERR(ctx->clk_xtal)) {
dev_err(dev, "failed to get xtal clock from DT\n");
return PTR_ERR(ctx->clk_xtal);
}
if (!client->irq) {
dev_err(dev, "no irq provided\n");
return -EINVAL;
}
irq_set_status_flags(client->irq, IRQ_NOAUTOEN);
ret = devm_request_threaded_irq(dev, client->irq, NULL,
sii8620_irq_thread,
IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
"sii8620", ctx);
if (ret < 0) {
dev_err(dev, "failed to install IRQ handler\n");
return ret;
}
ctx->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(ctx->gpio_reset)) {
dev_err(dev, "failed to get reset gpio from DT\n");
return PTR_ERR(ctx->gpio_reset);
}
ctx->supplies[0].supply = "cvcc10";
ctx->supplies[1].supply = "iovcc18";
ret = devm_regulator_bulk_get(dev, 2, ctx->supplies);
if (ret)
return ret;
ret = sii8620_extcon_init(ctx);
if (ret < 0) {
dev_err(ctx->dev, "failed to initialize EXTCON\n");
return ret;
}
i2c_set_clientdata(client, ctx);
ctx->bridge.funcs = &sii8620_bridge_funcs;
ctx->bridge.of_node = dev->of_node;
drm_bridge_add(&ctx->bridge);
if (!ctx->extcon)
sii8620_cable_in(ctx);
return 0;
}
static int sii8620_remove(struct i2c_client *client)
{
struct sii8620 *ctx = i2c_get_clientdata(client);
if (ctx->extcon) {
extcon_unregister_notifier(ctx->extcon, EXTCON_DISP_MHL,
&ctx->extcon_nb);
flush_work(&ctx->extcon_wq);
if (ctx->cable_state > 0)
sii8620_cable_out(ctx);
} else {
sii8620_cable_out(ctx);
}
drm_bridge_remove(&ctx->bridge);
return 0;
}
static const struct of_device_id sii8620_dt_match[] = {
{ .compatible = "sil,sii8620" },
{ },
};
MODULE_DEVICE_TABLE(of, sii8620_dt_match);
static const struct i2c_device_id sii8620_id[] = {
{ "sii8620", 0 },
{ },
};
MODULE_DEVICE_TABLE(i2c, sii8620_id);
static struct i2c_driver sii8620_driver = {
.driver = {
.name = "sii8620",
.of_match_table = of_match_ptr(sii8620_dt_match),
},
.probe = sii8620_probe,
.remove = sii8620_remove,
.id_table = sii8620_id,
};
module_i2c_driver(sii8620_driver);
MODULE_LICENSE("GPL v2");
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