diff options
Diffstat (limited to 'drivers/media/i2c/vpx3220.c')
| -rw-r--r-- | drivers/media/i2c/vpx3220.c | 591 |
1 files changed, 591 insertions, 0 deletions
diff --git a/drivers/media/i2c/vpx3220.c b/drivers/media/i2c/vpx3220.c new file mode 100644 index 0000000..2f67b4c --- /dev/null +++ b/drivers/media/i2c/vpx3220.c @@ -0,0 +1,591 @@ +/* + * vpx3220a, vpx3216b & vpx3214c video decoder driver version 0.0.1 + * + * Copyright (C) 2001 Laurent Pinchart <lpinchart@freegates.be> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <asm/uaccess.h> +#include <linux/i2c.h> +#include <linux/videodev2.h> +#include <media/v4l2-device.h> +#include <media/v4l2-chip-ident.h> +#include <media/v4l2-ctrls.h> + +MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video decoder driver"); +MODULE_AUTHOR("Laurent Pinchart"); +MODULE_LICENSE("GPL"); + +static int debug; +module_param(debug, int, 0); +MODULE_PARM_DESC(debug, "Debug level (0-1)"); + + +#define VPX_TIMEOUT_COUNT 10 + +/* ----------------------------------------------------------------------- */ + +struct vpx3220 { + struct v4l2_subdev sd; + struct v4l2_ctrl_handler hdl; + unsigned char reg[255]; + + v4l2_std_id norm; + int ident; + int input; + int enable; +}; + +static inline struct vpx3220 *to_vpx3220(struct v4l2_subdev *sd) +{ + return container_of(sd, struct vpx3220, sd); +} + +static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) +{ + return &container_of(ctrl->handler, struct vpx3220, hdl)->sd; +} + +static char *inputs[] = { "internal", "composite", "svideo" }; + +/* ----------------------------------------------------------------------- */ + +static inline int vpx3220_write(struct v4l2_subdev *sd, u8 reg, u8 value) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + struct vpx3220 *decoder = i2c_get_clientdata(client); + + decoder->reg[reg] = value; + return i2c_smbus_write_byte_data(client, reg, value); +} + +static inline int vpx3220_read(struct v4l2_subdev *sd, u8 reg) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + + return i2c_smbus_read_byte_data(client, reg); +} + +static int vpx3220_fp_status(struct v4l2_subdev *sd) +{ + unsigned char status; + unsigned int i; + + for (i = 0; i < VPX_TIMEOUT_COUNT; i++) { + status = vpx3220_read(sd, 0x29); + + if (!(status & 4)) + return 0; + + udelay(10); + + if (need_resched()) + cond_resched(); + } + + return -1; +} + +static int vpx3220_fp_write(struct v4l2_subdev *sd, u8 fpaddr, u16 data) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + + /* Write the 16-bit address to the FPWR register */ + if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) { + v4l2_dbg(1, debug, sd, "%s: failed\n", __func__); + return -1; + } + + if (vpx3220_fp_status(sd) < 0) + return -1; + + /* Write the 16-bit data to the FPDAT register */ + if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) { + v4l2_dbg(1, debug, sd, "%s: failed\n", __func__); + return -1; + } + + return 0; +} + +static u16 vpx3220_fp_read(struct v4l2_subdev *sd, u16 fpaddr) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + s16 data; + + /* Write the 16-bit address to the FPRD register */ + if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) { + v4l2_dbg(1, debug, sd, "%s: failed\n", __func__); + return -1; + } + + if (vpx3220_fp_status(sd) < 0) + return -1; + + /* Read the 16-bit data from the FPDAT register */ + data = i2c_smbus_read_word_data(client, 0x28); + if (data == -1) { + v4l2_dbg(1, debug, sd, "%s: failed\n", __func__); + return -1; + } + + return swab16(data); +} + +static int vpx3220_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len) +{ + u8 reg; + int ret = -1; + + while (len >= 2) { + reg = *data++; + ret = vpx3220_write(sd, reg, *data++); + if (ret < 0) + break; + len -= 2; + } + + return ret; +} + +static int vpx3220_write_fp_block(struct v4l2_subdev *sd, + const u16 *data, unsigned int len) +{ + u8 reg; + int ret = 0; + + while (len > 1) { + reg = *data++; + ret |= vpx3220_fp_write(sd, reg, *data++); + len -= 2; + } + + return ret; +} + +/* ---------------------------------------------------------------------- */ + +static const unsigned short init_ntsc[] = { + 0x1c, 0x00, /* NTSC tint angle */ + 0x88, 17, /* Window 1 vertical */ + 0x89, 240, /* Vertical lines in */ + 0x8a, 240, /* Vertical lines out */ + 0x8b, 000, /* Horizontal begin */ + 0x8c, 640, /* Horizontal length */ + 0x8d, 640, /* Number of pixels */ + 0x8f, 0xc00, /* Disable window 2 */ + 0xf0, 0x73, /* 13.5 MHz transport, Forced + * mode, latch windows */ + 0xf2, 0x13, /* NTSC M, composite input */ + 0xe7, 0x1e1, /* Enable vertical standard + * locking @ 240 lines */ +}; + +static const unsigned short init_pal[] = { + 0x88, 23, /* Window 1 vertical begin */ + 0x89, 288, /* Vertical lines in (16 lines + * skipped by the VFE) */ + 0x8a, 288, /* Vertical lines out (16 lines + * skipped by the VFE) */ + 0x8b, 16, /* Horizontal begin */ + 0x8c, 768, /* Horizontal length */ + 0x8d, 784, /* Number of pixels + * Must be >= Horizontal begin + Horizontal length */ + 0x8f, 0xc00, /* Disable window 2 */ + 0xf0, 0x77, /* 13.5 MHz transport, Forced + * mode, latch windows */ + 0xf2, 0x3d1, /* PAL B,G,H,I, composite input */ + 0xe7, 0x241, /* PAL/SECAM set to 288 lines */ +}; + +static const unsigned short init_secam[] = { + 0x88, 23, /* Window 1 vertical begin */ + 0x89, 288, /* Vertical lines in (16 lines + * skipped by the VFE) */ + 0x8a, 288, /* Vertical lines out (16 lines + * skipped by the VFE) */ + 0x8b, 16, /* Horizontal begin */ + 0x8c, 768, /* Horizontal length */ + 0x8d, 784, /* Number of pixels + * Must be >= Horizontal begin + Horizontal length */ + 0x8f, 0xc00, /* Disable window 2 */ + 0xf0, 0x77, /* 13.5 MHz transport, Forced + * mode, latch windows */ + 0xf2, 0x3d5, /* SECAM, composite input */ + 0xe7, 0x241, /* PAL/SECAM set to 288 lines */ +}; + +static const unsigned char init_common[] = { + 0xf2, 0x00, /* Disable all outputs */ + 0x33, 0x0d, /* Luma : VIN2, Chroma : CIN + * (clamp off) */ + 0xd8, 0xa8, /* HREF/VREF active high, VREF + * pulse = 2, Odd/Even flag */ + 0x20, 0x03, /* IF compensation 0dB/oct */ + 0xe0, 0xff, /* Open up all comparators */ + 0xe1, 0x00, + 0xe2, 0x7f, + 0xe3, 0x80, + 0xe4, 0x7f, + 0xe5, 0x80, + 0xe6, 0x00, /* Brightness set to 0 */ + 0xe7, 0xe0, /* Contrast to 1.0, noise shaping + * 10 to 8 2-bit error diffusion */ + 0xe8, 0xf8, /* YUV422, CbCr binary offset, + * ... (p.32) */ + 0xea, 0x18, /* LLC2 connected, output FIFO + * reset with VACTintern */ + 0xf0, 0x8a, /* Half full level to 10, bus + * shuffler [7:0, 23:16, 15:8] */ + 0xf1, 0x18, /* Single clock, sync mode, no + * FE delay, no HLEN counter */ + 0xf8, 0x12, /* Port A, PIXCLK, HF# & FE# + * strength to 2 */ + 0xf9, 0x24, /* Port B, HREF, VREF, PREF & + * ALPHA strength to 4 */ +}; + +static const unsigned short init_fp[] = { + 0x59, 0, + 0xa0, 2070, /* ACC reference */ + 0xa3, 0, + 0xa4, 0, + 0xa8, 30, + 0xb2, 768, + 0xbe, 27, + 0x58, 0, + 0x26, 0, + 0x4b, 0x298, /* PLL gain */ +}; + + +static int vpx3220_init(struct v4l2_subdev *sd, u32 val) +{ + struct vpx3220 *decoder = to_vpx3220(sd); + + vpx3220_write_block(sd, init_common, sizeof(init_common)); + vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1); + if (decoder->norm & V4L2_STD_NTSC) + vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1); + else if (decoder->norm & V4L2_STD_PAL) + vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1); + else if (decoder->norm & V4L2_STD_SECAM) + vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1); + else + vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1); + return 0; +} + +static int vpx3220_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd) +{ + int res = V4L2_IN_ST_NO_SIGNAL, status; + v4l2_std_id std = 0; + + status = vpx3220_fp_read(sd, 0x0f3); + + v4l2_dbg(1, debug, sd, "status: 0x%04x\n", status); + + if (status < 0) + return status; + + if ((status & 0x20) == 0) { + res = 0; + + switch (status & 0x18) { + case 0x00: + case 0x10: + case 0x14: + case 0x18: + std = V4L2_STD_PAL; + break; + + case 0x08: + std = V4L2_STD_SECAM; + break; + + case 0x04: + case 0x0c: + case 0x1c: + std = V4L2_STD_NTSC; + break; + } + } + if (pstd) + *pstd = std; + if (pstatus) + *pstatus = res; + return 0; +} + +static int vpx3220_querystd(struct v4l2_subdev *sd, v4l2_std_id *std) +{ + v4l2_dbg(1, debug, sd, "querystd\n"); + return vpx3220_status(sd, NULL, std); +} + +static int vpx3220_g_input_status(struct v4l2_subdev *sd, u32 *status) +{ + v4l2_dbg(1, debug, sd, "g_input_status\n"); + return vpx3220_status(sd, status, NULL); +} + +static int vpx3220_s_std(struct v4l2_subdev *sd, v4l2_std_id std) +{ + struct vpx3220 *decoder = to_vpx3220(sd); + int temp_input; + + /* Here we back up the input selection because it gets + overwritten when we fill the registers with the + chosen video norm */ + temp_input = vpx3220_fp_read(sd, 0xf2); + + v4l2_dbg(1, debug, sd, "s_std %llx\n", (unsigned long long)std); + if (std & V4L2_STD_NTSC) { + vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1); + v4l2_dbg(1, debug, sd, "norm switched to NTSC\n"); + } else if (std & V4L2_STD_PAL) { + vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1); + v4l2_dbg(1, debug, sd, "norm switched to PAL\n"); + } else if (std & V4L2_STD_SECAM) { + vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1); + v4l2_dbg(1, debug, sd, "norm switched to SECAM\n"); + } else { + return -EINVAL; + } + + decoder->norm = std; + + /* And here we set the backed up video input again */ + vpx3220_fp_write(sd, 0xf2, temp_input | 0x0010); + udelay(10); + return 0; +} + +static int vpx3220_s_routing(struct v4l2_subdev *sd, + u32 input, u32 output, u32 config) +{ + int data; + + /* RJ: input = 0: ST8 (PCTV) input + input = 1: COMPOSITE input + input = 2: SVHS input */ + + const int input_vals[3][2] = { + {0x0c, 0}, + {0x0d, 0}, + {0x0e, 1} + }; + + if (input > 2) + return -EINVAL; + + v4l2_dbg(1, debug, sd, "input switched to %s\n", inputs[input]); + + vpx3220_write(sd, 0x33, input_vals[input][0]); + + data = vpx3220_fp_read(sd, 0xf2) & ~(0x0020); + if (data < 0) + return data; + /* 0x0010 is required to latch the setting */ + vpx3220_fp_write(sd, 0xf2, + data | (input_vals[input][1] << 5) | 0x0010); + + udelay(10); + return 0; +} + +static int vpx3220_s_stream(struct v4l2_subdev *sd, int enable) +{ + v4l2_dbg(1, debug, sd, "s_stream %s\n", enable ? "on" : "off"); + + vpx3220_write(sd, 0xf2, (enable ? 0x1b : 0x00)); + return 0; +} + +static int vpx3220_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct v4l2_subdev *sd = to_sd(ctrl); + + switch (ctrl->id) { + case V4L2_CID_BRIGHTNESS: + vpx3220_write(sd, 0xe6, ctrl->val); + return 0; + case V4L2_CID_CONTRAST: + /* Bit 7 and 8 is for noise shaping */ + vpx3220_write(sd, 0xe7, ctrl->val + 192); + return 0; + case V4L2_CID_SATURATION: + vpx3220_fp_write(sd, 0xa0, ctrl->val); + return 0; + case V4L2_CID_HUE: + vpx3220_fp_write(sd, 0x1c, ctrl->val); + return 0; + } + return -EINVAL; +} + +static int vpx3220_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) +{ + struct vpx3220 *decoder = to_vpx3220(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + + return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0); +} + +/* ----------------------------------------------------------------------- */ + +static const struct v4l2_ctrl_ops vpx3220_ctrl_ops = { + .s_ctrl = vpx3220_s_ctrl, +}; + +static const struct v4l2_subdev_core_ops vpx3220_core_ops = { + .g_chip_ident = vpx3220_g_chip_ident, + .init = vpx3220_init, + .g_ext_ctrls = v4l2_subdev_g_ext_ctrls, + .try_ext_ctrls = v4l2_subdev_try_ext_ctrls, + .s_ext_ctrls = v4l2_subdev_s_ext_ctrls, + .g_ctrl = v4l2_subdev_g_ctrl, + .s_ctrl = v4l2_subdev_s_ctrl, + .queryctrl = v4l2_subdev_queryctrl, + .querymenu = v4l2_subdev_querymenu, + .s_std = vpx3220_s_std, +}; + +static const struct v4l2_subdev_video_ops vpx3220_video_ops = { + .s_routing = vpx3220_s_routing, + .s_stream = vpx3220_s_stream, + .querystd = vpx3220_querystd, + .g_input_status = vpx3220_g_input_status, +}; + +static const struct v4l2_subdev_ops vpx3220_ops = { + .core = &vpx3220_core_ops, + .video = &vpx3220_video_ops, +}; + +/* ----------------------------------------------------------------------- + * Client management code + */ + +static int vpx3220_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct vpx3220 *decoder; + struct v4l2_subdev *sd; + const char *name = NULL; + u8 ver; + u16 pn; + + /* Check if the adapter supports the needed features */ + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA)) + return -ENODEV; + + decoder = kzalloc(sizeof(struct vpx3220), GFP_KERNEL); + if (decoder == NULL) + return -ENOMEM; + sd = &decoder->sd; + v4l2_i2c_subdev_init(sd, client, &vpx3220_ops); + decoder->norm = V4L2_STD_PAL; + decoder->input = 0; + decoder->enable = 1; + v4l2_ctrl_handler_init(&decoder->hdl, 4); + v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops, + V4L2_CID_BRIGHTNESS, -128, 127, 1, 0); + v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops, + V4L2_CID_CONTRAST, 0, 63, 1, 32); + v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops, + V4L2_CID_SATURATION, 0, 4095, 1, 2048); + v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops, + V4L2_CID_HUE, -512, 511, 1, 0); + sd->ctrl_handler = &decoder->hdl; + if (decoder->hdl.error) { + int err = decoder->hdl.error; + + v4l2_ctrl_handler_free(&decoder->hdl); + kfree(decoder); + return err; + } + v4l2_ctrl_handler_setup(&decoder->hdl); + + ver = i2c_smbus_read_byte_data(client, 0x00); + pn = (i2c_smbus_read_byte_data(client, 0x02) << 8) + + i2c_smbus_read_byte_data(client, 0x01); + decoder->ident = V4L2_IDENT_VPX3220A; + if (ver == 0xec) { + switch (pn) { + case 0x4680: + name = "vpx3220a"; + break; + case 0x4260: + name = "vpx3216b"; + decoder->ident = V4L2_IDENT_VPX3216B; + break; + case 0x4280: + name = "vpx3214c"; + decoder->ident = V4L2_IDENT_VPX3214C; + break; + } + } + if (name) + v4l2_info(sd, "%s found @ 0x%x (%s)\n", name, + client->addr << 1, client->adapter->name); + else + v4l2_info(sd, "chip (%02x:%04x) found @ 0x%x (%s)\n", + ver, pn, client->addr << 1, client->adapter->name); + + vpx3220_write_block(sd, init_common, sizeof(init_common)); + vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1); + /* Default to PAL */ + vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1); + return 0; +} + +static int vpx3220_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct vpx3220 *decoder = to_vpx3220(sd); + + v4l2_device_unregister_subdev(sd); + v4l2_ctrl_handler_free(&decoder->hdl); + kfree(decoder); + return 0; +} + +static const struct i2c_device_id vpx3220_id[] = { + { "vpx3220a", 0 }, + { "vpx3216b", 0 }, + { "vpx3214c", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, vpx3220_id); + +static struct i2c_driver vpx3220_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "vpx3220", + }, + .probe = vpx3220_probe, + .remove = vpx3220_remove, + .id_table = vpx3220_id, +}; + +module_i2c_driver(vpx3220_driver); |
