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238 lines
6.2 KiB
238 lines
6.2 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* upd64031A - NEC Electronics Ghost Reduction for NTSC in Japan |
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* |
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* 2003 by T.Adachi <[email protected]> |
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* 2003 by Takeru KOMORIYA <[email protected]> |
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* 2006 by Hans Verkuil <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/i2c.h> |
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#include <linux/videodev2.h> |
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#include <linux/slab.h> |
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#include <media/v4l2-device.h> |
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#include <media/i2c/upd64031a.h> |
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/* --------------------- read registers functions define -------------------- */ |
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/* bit masks */ |
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#define GR_MODE_MASK 0xc0 |
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#define DIRECT_3DYCS_CONNECT_MASK 0xc0 |
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#define SYNC_CIRCUIT_MASK 0xa0 |
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/* -------------------------------------------------------------------------- */ |
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MODULE_DESCRIPTION("uPD64031A driver"); |
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MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil"); |
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MODULE_LICENSE("GPL"); |
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static int debug; |
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module_param(debug, int, 0644); |
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MODULE_PARM_DESC(debug, "Debug level (0-1)"); |
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enum { |
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R00 = 0, R01, R02, R03, R04, |
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R05, R06, R07, R08, R09, |
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R0A, R0B, R0C, R0D, R0E, R0F, |
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/* unused registers |
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R10, R11, R12, R13, R14, |
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R15, R16, R17, |
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*/ |
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TOT_REGS |
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}; |
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struct upd64031a_state { |
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struct v4l2_subdev sd; |
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u8 regs[TOT_REGS]; |
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u8 gr_mode; |
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u8 direct_3dycs_connect; |
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u8 ext_comp_sync; |
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u8 ext_vert_sync; |
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}; |
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static inline struct upd64031a_state *to_state(struct v4l2_subdev *sd) |
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{ |
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return container_of(sd, struct upd64031a_state, sd); |
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} |
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static u8 upd64031a_init[] = { |
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0x00, 0xb8, 0x48, 0xd2, 0xe6, |
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0x03, 0x10, 0x0b, 0xaf, 0x7f, |
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0x00, 0x00, 0x1d, 0x5e, 0x00, |
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0xd0 |
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}; |
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/* ------------------------------------------------------------------------ */ |
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static u8 upd64031a_read(struct v4l2_subdev *sd, u8 reg) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(sd); |
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u8 buf[2]; |
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if (reg >= sizeof(buf)) |
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return 0xff; |
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i2c_master_recv(client, buf, 2); |
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return buf[reg]; |
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} |
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/* ------------------------------------------------------------------------ */ |
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static void upd64031a_write(struct v4l2_subdev *sd, u8 reg, u8 val) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(sd); |
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u8 buf[2]; |
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buf[0] = reg; |
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buf[1] = val; |
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v4l2_dbg(1, debug, sd, "write reg: %02X val: %02X\n", reg, val); |
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if (i2c_master_send(client, buf, 2) != 2) |
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v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val); |
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} |
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/* ------------------------------------------------------------------------ */ |
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/* The input changed due to new input or channel changed */ |
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static int upd64031a_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *freq) |
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{ |
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struct upd64031a_state *state = to_state(sd); |
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u8 reg = state->regs[R00]; |
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v4l2_dbg(1, debug, sd, "changed input or channel\n"); |
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upd64031a_write(sd, R00, reg | 0x10); |
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upd64031a_write(sd, R00, reg & ~0x10); |
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return 0; |
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} |
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/* ------------------------------------------------------------------------ */ |
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static int upd64031a_s_routing(struct v4l2_subdev *sd, |
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u32 input, u32 output, u32 config) |
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{ |
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struct upd64031a_state *state = to_state(sd); |
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u8 r00, r05, r08; |
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state->gr_mode = (input & 3) << 6; |
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state->direct_3dycs_connect = (input & 0xc) << 4; |
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state->ext_comp_sync = |
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(input & UPD64031A_COMPOSITE_EXTERNAL) << 1; |
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state->ext_vert_sync = |
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(input & UPD64031A_VERTICAL_EXTERNAL) << 2; |
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r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode; |
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r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) | |
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state->ext_comp_sync | state->ext_vert_sync; |
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r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) | |
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state->direct_3dycs_connect; |
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upd64031a_write(sd, R00, r00); |
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upd64031a_write(sd, R05, r05); |
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upd64031a_write(sd, R08, r08); |
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return upd64031a_s_frequency(sd, NULL); |
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} |
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static int upd64031a_log_status(struct v4l2_subdev *sd) |
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{ |
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v4l2_info(sd, "Status: SA00=0x%02x SA01=0x%02x\n", |
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upd64031a_read(sd, 0), upd64031a_read(sd, 1)); |
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return 0; |
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} |
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#ifdef CONFIG_VIDEO_ADV_DEBUG |
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static int upd64031a_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) |
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{ |
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reg->val = upd64031a_read(sd, reg->reg & 0xff); |
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reg->size = 1; |
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return 0; |
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} |
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static int upd64031a_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) |
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{ |
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upd64031a_write(sd, reg->reg & 0xff, reg->val & 0xff); |
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return 0; |
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} |
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#endif |
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/* ----------------------------------------------------------------------- */ |
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static const struct v4l2_subdev_core_ops upd64031a_core_ops = { |
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.log_status = upd64031a_log_status, |
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#ifdef CONFIG_VIDEO_ADV_DEBUG |
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.g_register = upd64031a_g_register, |
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.s_register = upd64031a_s_register, |
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#endif |
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}; |
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static const struct v4l2_subdev_tuner_ops upd64031a_tuner_ops = { |
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.s_frequency = upd64031a_s_frequency, |
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}; |
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static const struct v4l2_subdev_video_ops upd64031a_video_ops = { |
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.s_routing = upd64031a_s_routing, |
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}; |
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static const struct v4l2_subdev_ops upd64031a_ops = { |
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.core = &upd64031a_core_ops, |
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.tuner = &upd64031a_tuner_ops, |
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.video = &upd64031a_video_ops, |
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}; |
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/* ------------------------------------------------------------------------ */ |
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/* i2c implementation */ |
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static int upd64031a_probe(struct i2c_client *client, |
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const struct i2c_device_id *id) |
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{ |
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struct upd64031a_state *state; |
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struct v4l2_subdev *sd; |
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int i; |
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
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return -EIO; |
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v4l_info(client, "chip found @ 0x%x (%s)\n", |
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client->addr << 1, client->adapter->name); |
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state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); |
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if (state == NULL) |
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return -ENOMEM; |
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sd = &state->sd; |
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v4l2_i2c_subdev_init(sd, client, &upd64031a_ops); |
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memcpy(state->regs, upd64031a_init, sizeof(state->regs)); |
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state->gr_mode = UPD64031A_GR_ON << 6; |
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state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4; |
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state->ext_comp_sync = state->ext_vert_sync = 0; |
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for (i = 0; i < TOT_REGS; i++) |
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upd64031a_write(sd, i, state->regs[i]); |
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return 0; |
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} |
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static int upd64031a_remove(struct i2c_client *client) |
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{ |
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struct v4l2_subdev *sd = i2c_get_clientdata(client); |
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v4l2_device_unregister_subdev(sd); |
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return 0; |
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} |
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/* ----------------------------------------------------------------------- */ |
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static const struct i2c_device_id upd64031a_id[] = { |
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{ "upd64031a", 0 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(i2c, upd64031a_id); |
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static struct i2c_driver upd64031a_driver = { |
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.driver = { |
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.name = "upd64031a", |
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}, |
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.probe = upd64031a_probe, |
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.remove = upd64031a_remove, |
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.id_table = upd64031a_id, |
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}; |
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module_i2c_driver(upd64031a_driver);
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