52ebc763d8
The direct register access ioctls were defined as kernel internal only, but they are very useful for debugging hardware from userspace and are used as such. Officially export them. VIDIOC_INT_[SG]_REGISTER is renamed to VIDIOC_DBG_[SG]_REGISTER Definition of ioctl and struct v4l2_register is moved from v4l2-common.h to videodev2.h. Types used in struct v4l2_register are changed to the userspace exportable versions (u32 -> __u32, etc). Use of VIDIOC_DBG_S_REGISTER requires CAP_SYS_ADMIN permission, so move the check into the video_ioctl2() dispatcher so it doesn't need to be duplicated in each driver's call-back function. CAP_SYS_ADMIN check is added to pvrusb2 (which doesn't use video_ioctl2). Signed-off-by: Trent Piepho <xyzzy@speakeasy.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
287 lines
7.1 KiB
C
287 lines
7.1 KiB
C
/*
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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 <tadachi@tadachi-net.com>
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* 2003 by Takeru KOMORIYA <komoriya@paken.org>
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* 2006 by Hans Verkuil <hverkuil@xs4all.nl>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/version.h>
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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 <media/v4l2-common.h>
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#include <media/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 = 0;
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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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static unsigned short normal_i2c[] = { 0x24 >> 1, 0x26 >> 1, I2C_CLIENT_END };
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I2C_CLIENT_INSMOD;
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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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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 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 i2c_client *client, u8 reg)
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{
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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 i2c_client *client, u8 reg, u8 val)
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{
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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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v4l_dbg(1, debug, client, "writing reg addr: %02X val: %02X\n", reg, val);
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if (i2c_master_send(client, buf, 2) != 2)
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v4l_err(client, "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 void upd64031a_change(struct i2c_client *client)
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{
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struct upd64031a_state *state = i2c_get_clientdata(client);
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u8 reg = state->regs[R00];
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v4l_dbg(1, debug, client, "changed input or channel\n");
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upd64031a_write(client, R00, reg | 0x10);
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upd64031a_write(client, R00, reg & ~0x10);
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}
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/* ------------------------------------------------------------------------ */
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static int upd64031a_command(struct i2c_client *client, unsigned int cmd, void *arg)
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{
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struct upd64031a_state *state = i2c_get_clientdata(client);
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struct v4l2_routing *route = arg;
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switch (cmd) {
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case VIDIOC_S_FREQUENCY:
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upd64031a_change(client);
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break;
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case VIDIOC_INT_G_VIDEO_ROUTING:
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route->input = (state->gr_mode >> 6) |
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(state->direct_3dycs_connect >> 4) |
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(state->ext_comp_sync >> 1) |
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(state->ext_vert_sync >> 2);
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route->output = 0;
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break;
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case VIDIOC_INT_S_VIDEO_ROUTING:
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{
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u8 r00, r05, r08;
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state->gr_mode = (route->input & 3) << 6;
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state->direct_3dycs_connect = (route->input & 0xc) << 4;
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state->ext_comp_sync = (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
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state->ext_vert_sync = (route->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(client, R00, r00);
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upd64031a_write(client, R05, r05);
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upd64031a_write(client, R08, r08);
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upd64031a_change(client);
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break;
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}
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case VIDIOC_LOG_STATUS:
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v4l_info(client, "Status: SA00=0x%02x SA01=0x%02x\n",
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upd64031a_read(client, 0), upd64031a_read(client, 1));
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break;
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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case VIDIOC_DBG_G_REGISTER:
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{
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struct v4l2_register *reg = arg;
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if (reg->i2c_id != I2C_DRIVERID_UPD64031A)
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return -EINVAL;
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reg->val = upd64031a_read(client, reg->reg & 0xff);
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break;
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}
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case VIDIOC_DBG_S_REGISTER:
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{
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struct v4l2_register *reg = arg;
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u8 addr = reg->reg & 0xff;
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u8 val = reg->val & 0xff;
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if (reg->i2c_id != I2C_DRIVERID_UPD64031A)
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return -EINVAL;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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upd64031a_write(client, addr, val);
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break;
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}
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#endif
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default:
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break;
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}
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return 0;
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}
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/* ------------------------------------------------------------------------ */
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/* i2c implementation */
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static struct i2c_driver i2c_driver;
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static int upd64031a_attach(struct i2c_adapter *adapter, int address, int kind)
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{
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struct i2c_client *client;
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struct upd64031a_state *state;
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int i;
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return 0;
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client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
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if (client == NULL) {
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return -ENOMEM;
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}
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client->addr = address;
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client->adapter = adapter;
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client->driver = &i2c_driver;
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snprintf(client->name, sizeof(client->name) - 1, "uPD64031A");
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v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
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state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
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if (state == NULL) {
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kfree(client);
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return -ENOMEM;
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}
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i2c_set_clientdata(client, state);
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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(client, i, state->regs[i]);
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}
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i2c_attach_client(client);
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return 0;
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}
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static int upd64031a_probe(struct i2c_adapter *adapter)
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{
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if (adapter->class & I2C_CLASS_TV_ANALOG)
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return i2c_probe(adapter, &addr_data, upd64031a_attach);
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return 0;
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}
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static int upd64031a_detach(struct i2c_client *client)
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{
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int err;
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err = i2c_detach_client(client);
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if (err)
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return err;
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kfree(client);
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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/* i2c implementation */
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static struct i2c_driver i2c_driver = {
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.driver = {
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.name = "upd64031a",
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},
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.id = I2C_DRIVERID_UPD64031A,
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.attach_adapter = upd64031a_probe,
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.detach_client = upd64031a_detach,
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.command = upd64031a_command,
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};
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static int __init upd64031a_init_module(void)
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{
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return i2c_add_driver(&i2c_driver);
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}
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static void __exit upd64031a_exit_module(void)
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{
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i2c_del_driver(&i2c_driver);
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}
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module_init(upd64031a_init_module);
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module_exit(upd64031a_exit_module);
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