/* * 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 <linux/byteorder/swab.h> #include <asm/io.h> #include <asm/uaccess.h> #include <linux/i2c.h> #define I2C_NAME(x) (x)->name #include <linux/videodev.h> #include <media/v4l2-common.h> #include <linux/video_decoder.h> #define I2C_VPX3220 0x86 #define VPX3220_DEBUG KERN_DEBUG "vpx3220: " static int debug; module_param(debug, int, 0); MODULE_PARM_DESC(debug, "Debug level (0-1)"); #define dprintk(num, format, args...) \ do { \ if (debug >= num) \ printk(format, ##args); \ } while (0) #define VPX_TIMEOUT_COUNT 10 /* ----------------------------------------------------------------------- */ struct vpx3220 { unsigned char reg[255]; int norm; int input; int enable; int bright; int contrast; int hue; int sat; }; static char *inputs[] = { "internal", "composite", "svideo" }; /* ----------------------------------------------------------------------- */ static inline int vpx3220_write (struct i2c_client *client, u8 reg, u8 value) { 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 i2c_client *client, u8 reg) { return i2c_smbus_read_byte_data(client, reg); } static int vpx3220_fp_status (struct i2c_client *client) { unsigned char status; unsigned int i; for (i = 0; i < VPX_TIMEOUT_COUNT; i++) { status = vpx3220_read(client, 0x29); if (!(status & 4)) return 0; udelay(10); if (need_resched()) cond_resched(); } return -1; } static int vpx3220_fp_write (struct i2c_client *client, u8 fpaddr, u16 data) { /* Write the 16-bit address to the FPWR register */ if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) { dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__); return -1; } if (vpx3220_fp_status(client) < 0) return -1; /* Write the 16-bit data to the FPDAT register */ if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) { dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__); return -1; } return 0; } static u16 vpx3220_fp_read (struct i2c_client *client, u16 fpaddr) { s16 data; /* Write the 16-bit address to the FPRD register */ if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) { dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__); return -1; } if (vpx3220_fp_status(client) < 0) return -1; /* Read the 16-bit data from the FPDAT register */ data = i2c_smbus_read_word_data(client, 0x28); if (data == -1) { dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__); return -1; } return swab16(data); } static int vpx3220_write_block (struct i2c_client *client, const u8 *data, unsigned int len) { u8 reg; int ret = -1; while (len >= 2) { reg = *data++; if ((ret = vpx3220_write(client, reg, *data++)) < 0) break; len -= 2; } return ret; } static int vpx3220_write_fp_block (struct i2c_client *client, const u16 *data, unsigned int len) { u8 reg; int ret = 0; while (len > 1) { reg = *data++; ret |= vpx3220_fp_write(client, 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 void vpx3220_dump_i2c (struct i2c_client *client) { int len = sizeof(init_common); const unsigned char *data = init_common; while (len > 1) { dprintk(1, KERN_DEBUG "vpx3216b i2c reg 0x%02x data 0x%02x\n", *data, vpx3220_read(client, *data)); data += 2; len -= 2; } } static int vpx3220_command (struct i2c_client *client, unsigned int cmd, void *arg) { struct vpx3220 *decoder = i2c_get_clientdata(client); switch (cmd) { case 0: { vpx3220_write_block(client, init_common, sizeof(init_common)); vpx3220_write_fp_block(client, init_fp, sizeof(init_fp) >> 1); switch (decoder->norm) { case VIDEO_MODE_NTSC: vpx3220_write_fp_block(client, init_ntsc, sizeof(init_ntsc) >> 1); break; case VIDEO_MODE_PAL: vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1); break; case VIDEO_MODE_SECAM: vpx3220_write_fp_block(client, init_secam, sizeof(init_secam) >> 1); break; default: vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1); break; } } break; case DECODER_DUMP: { vpx3220_dump_i2c(client); } break; case DECODER_GET_CAPABILITIES: { struct video_decoder_capability *cap = arg; dprintk(1, KERN_DEBUG "%s: DECODER_GET_CAPABILITIES\n", I2C_NAME(client)); cap->flags = VIDEO_DECODER_PAL | VIDEO_DECODER_NTSC | VIDEO_DECODER_SECAM | VIDEO_DECODER_AUTO | VIDEO_DECODER_CCIR; cap->inputs = 3; cap->outputs = 1; } break; case DECODER_GET_STATUS: { int res = 0, status; dprintk(1, KERN_INFO "%s: DECODER_GET_STATUS\n", I2C_NAME(client)); status = vpx3220_fp_read(client, 0x0f3); dprintk(1, KERN_INFO "%s: status: 0x%04x\n", I2C_NAME(client), status); if (status < 0) return status; if ((status & 0x20) == 0) { res |= DECODER_STATUS_GOOD | DECODER_STATUS_COLOR; switch (status & 0x18) { case 0x00: case 0x10: case 0x14: case 0x18: res |= DECODER_STATUS_PAL; break; case 0x08: res |= DECODER_STATUS_SECAM; break; case 0x04: case 0x0c: case 0x1c: res |= DECODER_STATUS_NTSC; break; } } *(int *) arg = res; } break; case DECODER_SET_NORM: { int *iarg = arg, data; int temp_input; /* Here we back up the input selection because it gets overwritten when we fill the registers with the choosen video norm */ temp_input = vpx3220_fp_read(client, 0xf2); dprintk(1, KERN_DEBUG "%s: DECODER_SET_NORM %d\n", I2C_NAME(client), *iarg); switch (*iarg) { case VIDEO_MODE_NTSC: vpx3220_write_fp_block(client, init_ntsc, sizeof(init_ntsc) >> 1); dprintk(1, KERN_INFO "%s: norm switched to NTSC\n", I2C_NAME(client)); break; case VIDEO_MODE_PAL: vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1); dprintk(1, KERN_INFO "%s: norm switched to PAL\n", I2C_NAME(client)); break; case VIDEO_MODE_SECAM: vpx3220_write_fp_block(client, init_secam, sizeof(init_secam) >> 1); dprintk(1, KERN_INFO "%s: norm switched to SECAM\n", I2C_NAME(client)); break; case VIDEO_MODE_AUTO: /* FIXME This is only preliminary support */ data = vpx3220_fp_read(client, 0xf2) & 0x20; vpx3220_fp_write(client, 0xf2, 0x00c0 | data); dprintk(1, KERN_INFO "%s: norm switched to Auto\n", I2C_NAME(client)); break; default: return -EINVAL; } decoder->norm = *iarg; /* And here we set the backed up video input again */ vpx3220_fp_write(client, 0xf2, temp_input | 0x0010); udelay(10); } break; case DECODER_SET_INPUT: { int *iarg = arg, data; /* RJ: *iarg = 0: ST8 (PCTV) input *iarg = 1: COMPOSITE input *iarg = 2: SVHS input */ const int input[3][2] = { {0x0c, 0}, {0x0d, 0}, {0x0e, 1} }; if (*iarg < 0 || *iarg > 2) return -EINVAL; dprintk(1, KERN_INFO "%s: input switched to %s\n", I2C_NAME(client), inputs[*iarg]); vpx3220_write(client, 0x33, input[*iarg][0]); data = vpx3220_fp_read(client, 0xf2) & ~(0x0020); if (data < 0) return data; /* 0x0010 is required to latch the setting */ vpx3220_fp_write(client, 0xf2, data | (input[*iarg][1] << 5) | 0x0010); udelay(10); } break; case DECODER_SET_OUTPUT: { int *iarg = arg; /* not much choice of outputs */ if (*iarg != 0) { return -EINVAL; } } break; case DECODER_ENABLE_OUTPUT: { int *iarg = arg; dprintk(1, KERN_DEBUG "%s: DECODER_ENABLE_OUTPUT %d\n", I2C_NAME(client), *iarg); vpx3220_write(client, 0xf2, (*iarg ? 0x1b : 0x00)); } break; case DECODER_SET_PICTURE: { struct video_picture *pic = arg; if (decoder->bright != pic->brightness) { /* We want -128 to 128 we get 0-65535 */ decoder->bright = pic->brightness; vpx3220_write(client, 0xe6, (decoder->bright - 32768) >> 8); } if (decoder->contrast != pic->contrast) { /* We want 0 to 64 we get 0-65535 */ /* Bit 7 and 8 is for noise shaping */ decoder->contrast = pic->contrast; vpx3220_write(client, 0xe7, (decoder->contrast >> 10) + 192); } if (decoder->sat != pic->colour) { /* We want 0 to 4096 we get 0-65535 */ decoder->sat = pic->colour; vpx3220_fp_write(client, 0xa0, decoder->sat >> 4); } if (decoder->hue != pic->hue) { /* We want -512 to 512 we get 0-65535 */ decoder->hue = pic->hue; vpx3220_fp_write(client, 0x1c, ((decoder->hue - 32768) >> 6) & 0xFFF); } } break; default: return -EINVAL; } return 0; } static int vpx3220_init_client (struct i2c_client *client) { vpx3220_write_block(client, init_common, sizeof(init_common)); vpx3220_write_fp_block(client, init_fp, sizeof(init_fp) >> 1); /* Default to PAL */ vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1); return 0; } /* ----------------------------------------------------------------------- * Client management code */ /* * Generic i2c probe * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' */ static unsigned short normal_i2c[] = { I2C_VPX3220 >> 1, (I2C_VPX3220 >> 1) + 4, I2C_CLIENT_END }; static unsigned short ignore = I2C_CLIENT_END; static struct i2c_client_address_data addr_data = { .normal_i2c = normal_i2c, .probe = &ignore, .ignore = &ignore, }; static struct i2c_driver vpx3220_i2c_driver; static int vpx3220_detach_client (struct i2c_client *client) { struct vpx3220 *decoder = i2c_get_clientdata(client); int err; err = i2c_detach_client(client); if (err) { return err; } kfree(decoder); kfree(client); return 0; } static int vpx3220_detect_client (struct i2c_adapter *adapter, int address, int kind) { int err; struct i2c_client *client; struct vpx3220 *decoder; dprintk(1, VPX3220_DEBUG "%s\n", __func__); /* Check if the adapter supports the needed features */ if (!i2c_check_functionality (adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA)) return 0; client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); if (client == NULL) { return -ENOMEM; } client->addr = address; client->adapter = adapter; client->driver = &vpx3220_i2c_driver; /* Check for manufacture ID and part number */ if (kind < 0) { u8 id; u16 pn; id = vpx3220_read(client, 0x00); if (id != 0xec) { dprintk(1, KERN_INFO "vpx3220_attach: Wrong manufacturer ID (0x%02x)\n", id); kfree(client); return 0; } pn = (vpx3220_read(client, 0x02) << 8) + vpx3220_read(client, 0x01); switch (pn) { case 0x4680: strlcpy(I2C_NAME(client), "vpx3220a", sizeof(I2C_NAME(client))); break; case 0x4260: strlcpy(I2C_NAME(client), "vpx3216b", sizeof(I2C_NAME(client))); break; case 0x4280: strlcpy(I2C_NAME(client), "vpx3214c", sizeof(I2C_NAME(client))); break; default: dprintk(1, KERN_INFO "%s: Wrong part number (0x%04x)\n", __func__, pn); kfree(client); return 0; } } else { strlcpy(I2C_NAME(client), "forced vpx32xx", sizeof(I2C_NAME(client))); } decoder = kzalloc(sizeof(struct vpx3220), GFP_KERNEL); if (decoder == NULL) { kfree(client); return -ENOMEM; } decoder->norm = VIDEO_MODE_PAL; decoder->input = 0; decoder->enable = 1; decoder->bright = 32768; decoder->contrast = 32768; decoder->hue = 32768; decoder->sat = 32768; i2c_set_clientdata(client, decoder); err = i2c_attach_client(client); if (err) { kfree(client); kfree(decoder); return err; } dprintk(1, KERN_INFO "%s: vpx32xx client found at address 0x%02x\n", I2C_NAME(client), client->addr << 1); vpx3220_init_client(client); return 0; } static int vpx3220_attach_adapter (struct i2c_adapter *adapter) { int ret; ret = i2c_probe(adapter, &addr_data, &vpx3220_detect_client); dprintk(1, VPX3220_DEBUG "%s: i2c_probe returned %d\n", __func__, ret); return ret; } /* ----------------------------------------------------------------------- * Driver initialization and cleanup code */ static struct i2c_driver vpx3220_i2c_driver = { .driver = { .name = "vpx3220", }, .id = I2C_DRIVERID_VPX3220, .attach_adapter = vpx3220_attach_adapter, .detach_client = vpx3220_detach_client, .command = vpx3220_command, }; static int __init vpx3220_init (void) { return i2c_add_driver(&vpx3220_i2c_driver); } static void __exit vpx3220_cleanup (void) { i2c_del_driver(&vpx3220_i2c_driver); } module_init(vpx3220_init); module_exit(vpx3220_cleanup); MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video decoder driver"); MODULE_AUTHOR("Laurent Pinchart"); MODULE_LICENSE("GPL");