| /* |
| * Support for Legend Silicon GB20600 (a.k.a DMB-TH) demodulator |
| * LGS8913, LGS8GL5, LGS8G75 |
| * experimental support LGS8G42, LGS8G52 |
| * |
| * Copyright (C) 2007-2009 David T.L. Wong <davidtlwong@gmail.com> |
| * Copyright (C) 2008 Sirius International (Hong Kong) Limited |
| * Timothy Lee <timothy.lee@siriushk.com> (for initial work on LGS8GL5) |
| * |
| * 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. |
| * |
| */ |
| |
| #include <asm/div64.h> |
| #include <linux/firmware.h> |
| |
| #include <media/dvb_frontend.h> |
| |
| #include "lgs8gxx.h" |
| #include "lgs8gxx_priv.h" |
| |
| #define dprintk(args...) \ |
| do { \ |
| if (debug) \ |
| printk(KERN_DEBUG "lgs8gxx: " args); \ |
| } while (0) |
| |
| static int debug; |
| static int fake_signal_str = 1; |
| |
| #define LGS8GXX_FIRMWARE "lgs8g75.fw" |
| |
| module_param(debug, int, 0644); |
| MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); |
| |
| module_param(fake_signal_str, int, 0644); |
| MODULE_PARM_DESC(fake_signal_str, "fake signal strength for LGS8913." |
| "Signal strength calculation is slow.(default:on)."); |
| |
| /* LGS8GXX internal helper functions */ |
| |
| static int lgs8gxx_write_reg(struct lgs8gxx_state *priv, u8 reg, u8 data) |
| { |
| int ret; |
| u8 buf[] = { reg, data }; |
| struct i2c_msg msg = { .flags = 0, .buf = buf, .len = 2 }; |
| |
| msg.addr = priv->config->demod_address; |
| if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0) |
| msg.addr += 0x02; |
| |
| if (debug >= 2) |
| dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, data); |
| |
| ret = i2c_transfer(priv->i2c, &msg, 1); |
| |
| if (ret != 1) |
| dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n", |
| __func__, reg, data, ret); |
| |
| return (ret != 1) ? -1 : 0; |
| } |
| |
| static int lgs8gxx_read_reg(struct lgs8gxx_state *priv, u8 reg, u8 *p_data) |
| { |
| int ret; |
| u8 dev_addr; |
| |
| u8 b0[] = { reg }; |
| u8 b1[] = { 0 }; |
| struct i2c_msg msg[] = { |
| { .flags = 0, .buf = b0, .len = 1 }, |
| { .flags = I2C_M_RD, .buf = b1, .len = 1 }, |
| }; |
| |
| dev_addr = priv->config->demod_address; |
| if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0) |
| dev_addr += 0x02; |
| msg[1].addr = msg[0].addr = dev_addr; |
| |
| ret = i2c_transfer(priv->i2c, msg, 2); |
| if (ret != 2) { |
| dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg, ret); |
| return -1; |
| } |
| |
| *p_data = b1[0]; |
| if (debug >= 2) |
| dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, b1[0]); |
| return 0; |
| } |
| |
| static int lgs8gxx_soft_reset(struct lgs8gxx_state *priv) |
| { |
| lgs8gxx_write_reg(priv, 0x02, 0x00); |
| msleep(1); |
| lgs8gxx_write_reg(priv, 0x02, 0x01); |
| msleep(100); |
| |
| return 0; |
| } |
| |
| static int wait_reg_mask(struct lgs8gxx_state *priv, u8 reg, u8 mask, |
| u8 val, u8 delay, u8 tries) |
| { |
| u8 t; |
| int i; |
| |
| for (i = 0; i < tries; i++) { |
| lgs8gxx_read_reg(priv, reg, &t); |
| |
| if ((t & mask) == val) |
| return 0; |
| msleep(delay); |
| } |
| |
| return 1; |
| } |
| |
| static int lgs8gxx_set_ad_mode(struct lgs8gxx_state *priv) |
| { |
| const struct lgs8gxx_config *config = priv->config; |
| u8 if_conf; |
| |
| if_conf = 0x10; /* AGC output on, RF_AGC output off; */ |
| |
| if_conf |= |
| ((config->ext_adc) ? 0x80 : 0x00) | |
| ((config->if_neg_center) ? 0x04 : 0x00) | |
| ((config->if_freq == 0) ? 0x08 : 0x00) | /* Baseband */ |
| ((config->adc_signed) ? 0x02 : 0x00) | |
| ((config->if_neg_edge) ? 0x01 : 0x00); |
| |
| if (config->ext_adc && |
| (config->prod == LGS8GXX_PROD_LGS8G52)) { |
| lgs8gxx_write_reg(priv, 0xBA, 0x40); |
| } |
| |
| lgs8gxx_write_reg(priv, 0x07, if_conf); |
| |
| return 0; |
| } |
| |
| static int lgs8gxx_set_if_freq(struct lgs8gxx_state *priv, u32 freq /*in kHz*/) |
| { |
| u64 val; |
| u32 v32; |
| u32 if_clk; |
| |
| if_clk = priv->config->if_clk_freq; |
| |
| val = freq; |
| if (freq != 0) { |
| val <<= 32; |
| if (if_clk != 0) |
| do_div(val, if_clk); |
| v32 = val & 0xFFFFFFFF; |
| dprintk("Set IF Freq to %dkHz\n", freq); |
| } else { |
| v32 = 0; |
| dprintk("Set IF Freq to baseband\n"); |
| } |
| dprintk("AFC_INIT_FREQ = 0x%08X\n", v32); |
| |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) { |
| lgs8gxx_write_reg(priv, 0x08, 0xFF & (v32)); |
| lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32 >> 8)); |
| lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 16)); |
| lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 24)); |
| } else { |
| lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32)); |
| lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 8)); |
| lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 16)); |
| lgs8gxx_write_reg(priv, 0x0C, 0xFF & (v32 >> 24)); |
| } |
| |
| return 0; |
| } |
| |
| static int lgs8gxx_get_afc_phase(struct lgs8gxx_state *priv) |
| { |
| u64 val; |
| u32 v32 = 0; |
| u8 reg_addr, t; |
| int i; |
| |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) |
| reg_addr = 0x23; |
| else |
| reg_addr = 0x48; |
| |
| for (i = 0; i < 4; i++) { |
| lgs8gxx_read_reg(priv, reg_addr, &t); |
| v32 <<= 8; |
| v32 |= t; |
| reg_addr--; |
| } |
| |
| val = v32; |
| val *= priv->config->if_clk_freq; |
| val >>= 32; |
| dprintk("AFC = %u kHz\n", (u32)val); |
| return 0; |
| } |
| |
| static int lgs8gxx_set_mode_auto(struct lgs8gxx_state *priv) |
| { |
| u8 t; |
| u8 prod = priv->config->prod; |
| |
| if (prod == LGS8GXX_PROD_LGS8913) |
| lgs8gxx_write_reg(priv, 0xC6, 0x01); |
| |
| if (prod == LGS8GXX_PROD_LGS8G75) { |
| lgs8gxx_read_reg(priv, 0x0C, &t); |
| t &= (~0x04); |
| lgs8gxx_write_reg(priv, 0x0C, t | 0x80); |
| lgs8gxx_write_reg(priv, 0x39, 0x00); |
| lgs8gxx_write_reg(priv, 0x3D, 0x04); |
| } else if (prod == LGS8GXX_PROD_LGS8913 || |
| prod == LGS8GXX_PROD_LGS8GL5 || |
| prod == LGS8GXX_PROD_LGS8G42 || |
| prod == LGS8GXX_PROD_LGS8G52 || |
| prod == LGS8GXX_PROD_LGS8G54) { |
| lgs8gxx_read_reg(priv, 0x7E, &t); |
| lgs8gxx_write_reg(priv, 0x7E, t | 0x01); |
| |
| /* clear FEC self reset */ |
| lgs8gxx_read_reg(priv, 0xC5, &t); |
| lgs8gxx_write_reg(priv, 0xC5, t & 0xE0); |
| } |
| |
| if (prod == LGS8GXX_PROD_LGS8913) { |
| /* FEC auto detect */ |
| lgs8gxx_write_reg(priv, 0xC1, 0x03); |
| |
| lgs8gxx_read_reg(priv, 0x7C, &t); |
| t = (t & 0x8C) | 0x03; |
| lgs8gxx_write_reg(priv, 0x7C, t); |
| |
| /* BER test mode */ |
| lgs8gxx_read_reg(priv, 0xC3, &t); |
| t = (t & 0xEF) | 0x10; |
| lgs8gxx_write_reg(priv, 0xC3, t); |
| } |
| |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G52) |
| lgs8gxx_write_reg(priv, 0xD9, 0x40); |
| |
| return 0; |
| } |
| |
| static int lgs8gxx_set_mode_manual(struct lgs8gxx_state *priv) |
| { |
| u8 t; |
| |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) { |
| u8 t2; |
| lgs8gxx_read_reg(priv, 0x0C, &t); |
| t &= (~0x80); |
| lgs8gxx_write_reg(priv, 0x0C, t); |
| |
| lgs8gxx_read_reg(priv, 0x0C, &t); |
| lgs8gxx_read_reg(priv, 0x19, &t2); |
| |
| if (((t&0x03) == 0x01) && (t2&0x01)) { |
| lgs8gxx_write_reg(priv, 0x6E, 0x05); |
| lgs8gxx_write_reg(priv, 0x39, 0x02); |
| lgs8gxx_write_reg(priv, 0x39, 0x03); |
| lgs8gxx_write_reg(priv, 0x3D, 0x05); |
| lgs8gxx_write_reg(priv, 0x3E, 0x28); |
| lgs8gxx_write_reg(priv, 0x53, 0x80); |
| } else { |
| lgs8gxx_write_reg(priv, 0x6E, 0x3F); |
| lgs8gxx_write_reg(priv, 0x39, 0x00); |
| lgs8gxx_write_reg(priv, 0x3D, 0x04); |
| } |
| |
| lgs8gxx_soft_reset(priv); |
| return 0; |
| } |
| |
| /* turn off auto-detect; manual settings */ |
| lgs8gxx_write_reg(priv, 0x7E, 0); |
| if (priv->config->prod == LGS8GXX_PROD_LGS8913) |
| lgs8gxx_write_reg(priv, 0xC1, 0); |
| |
| lgs8gxx_read_reg(priv, 0xC5, &t); |
| t = (t & 0xE0) | 0x06; |
| lgs8gxx_write_reg(priv, 0xC5, t); |
| |
| lgs8gxx_soft_reset(priv); |
| |
| return 0; |
| } |
| |
| static int lgs8gxx_is_locked(struct lgs8gxx_state *priv, u8 *locked) |
| { |
| int ret = 0; |
| u8 t; |
| |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) |
| ret = lgs8gxx_read_reg(priv, 0x13, &t); |
| else |
| ret = lgs8gxx_read_reg(priv, 0x4B, &t); |
| if (ret != 0) |
| return ret; |
| |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) |
| *locked = ((t & 0x80) == 0x80) ? 1 : 0; |
| else |
| *locked = ((t & 0xC0) == 0xC0) ? 1 : 0; |
| return 0; |
| } |
| |
| /* Wait for Code Acquisition Lock */ |
| static int lgs8gxx_wait_ca_lock(struct lgs8gxx_state *priv, u8 *locked) |
| { |
| int ret = 0; |
| u8 reg, mask, val; |
| |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) { |
| reg = 0x13; |
| mask = 0x80; |
| val = 0x80; |
| } else { |
| reg = 0x4B; |
| mask = 0xC0; |
| val = 0xC0; |
| } |
| |
| ret = wait_reg_mask(priv, reg, mask, val, 50, 40); |
| *locked = (ret == 0) ? 1 : 0; |
| |
| return 0; |
| } |
| |
| static int lgs8gxx_is_autodetect_finished(struct lgs8gxx_state *priv, |
| u8 *finished) |
| { |
| int ret = 0; |
| u8 reg, mask, val; |
| |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) { |
| reg = 0x1f; |
| mask = 0xC0; |
| val = 0x80; |
| } else { |
| reg = 0xA4; |
| mask = 0x03; |
| val = 0x01; |
| } |
| |
| ret = wait_reg_mask(priv, reg, mask, val, 10, 20); |
| *finished = (ret == 0) ? 1 : 0; |
| |
| return 0; |
| } |
| |
| static int lgs8gxx_autolock_gi(struct lgs8gxx_state *priv, u8 gi, u8 cpn, |
| u8 *locked) |
| { |
| int err = 0; |
| u8 ad_fini = 0; |
| u8 t1, t2; |
| |
| if (gi == GI_945) |
| dprintk("try GI 945\n"); |
| else if (gi == GI_595) |
| dprintk("try GI 595\n"); |
| else if (gi == GI_420) |
| dprintk("try GI 420\n"); |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) { |
| lgs8gxx_read_reg(priv, 0x0C, &t1); |
| lgs8gxx_read_reg(priv, 0x18, &t2); |
| t1 &= ~(GI_MASK); |
| t1 |= gi; |
| t2 &= 0xFE; |
| t2 |= cpn ? 0x01 : 0x00; |
| lgs8gxx_write_reg(priv, 0x0C, t1); |
| lgs8gxx_write_reg(priv, 0x18, t2); |
| } else { |
| lgs8gxx_write_reg(priv, 0x04, gi); |
| } |
| lgs8gxx_soft_reset(priv); |
| err = lgs8gxx_wait_ca_lock(priv, locked); |
| if (err || !(*locked)) |
| return err; |
| err = lgs8gxx_is_autodetect_finished(priv, &ad_fini); |
| if (err != 0) |
| return err; |
| if (ad_fini) { |
| dprintk("auto detect finished\n"); |
| } else |
| *locked = 0; |
| |
| return 0; |
| } |
| |
| static int lgs8gxx_auto_detect(struct lgs8gxx_state *priv, |
| u8 *detected_param, u8 *gi) |
| { |
| int i, j; |
| int err = 0; |
| u8 locked = 0, tmp_gi; |
| |
| dprintk("%s\n", __func__); |
| |
| lgs8gxx_set_mode_auto(priv); |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) { |
| lgs8gxx_write_reg(priv, 0x67, 0xAA); |
| lgs8gxx_write_reg(priv, 0x6E, 0x3F); |
| } else { |
| /* Guard Interval */ |
| lgs8gxx_write_reg(priv, 0x03, 00); |
| } |
| |
| for (i = 0; i < 2; i++) { |
| for (j = 0; j < 2; j++) { |
| tmp_gi = GI_945; |
| err = lgs8gxx_autolock_gi(priv, GI_945, j, &locked); |
| if (err) |
| goto out; |
| if (locked) |
| goto locked; |
| } |
| for (j = 0; j < 2; j++) { |
| tmp_gi = GI_420; |
| err = lgs8gxx_autolock_gi(priv, GI_420, j, &locked); |
| if (err) |
| goto out; |
| if (locked) |
| goto locked; |
| } |
| tmp_gi = GI_595; |
| err = lgs8gxx_autolock_gi(priv, GI_595, 1, &locked); |
| if (err) |
| goto out; |
| if (locked) |
| goto locked; |
| } |
| |
| locked: |
| if ((err == 0) && (locked == 1)) { |
| u8 t; |
| |
| if (priv->config->prod != LGS8GXX_PROD_LGS8G75) { |
| lgs8gxx_read_reg(priv, 0xA2, &t); |
| *detected_param = t; |
| } else { |
| lgs8gxx_read_reg(priv, 0x1F, &t); |
| *detected_param = t & 0x3F; |
| } |
| |
| if (tmp_gi == GI_945) |
| dprintk("GI 945 locked\n"); |
| else if (tmp_gi == GI_595) |
| dprintk("GI 595 locked\n"); |
| else if (tmp_gi == GI_420) |
| dprintk("GI 420 locked\n"); |
| *gi = tmp_gi; |
| } |
| if (!locked) |
| err = -1; |
| |
| out: |
| return err; |
| } |
| |
| static void lgs8gxx_auto_lock(struct lgs8gxx_state *priv) |
| { |
| s8 err; |
| u8 gi = 0x2; |
| u8 detected_param = 0; |
| |
| err = lgs8gxx_auto_detect(priv, &detected_param, &gi); |
| |
| if (err != 0) { |
| dprintk("lgs8gxx_auto_detect failed\n"); |
| } else |
| dprintk("detected param = 0x%02X\n", detected_param); |
| |
| /* Apply detected parameters */ |
| if (priv->config->prod == LGS8GXX_PROD_LGS8913) { |
| u8 inter_leave_len = detected_param & TIM_MASK ; |
| /* Fix 8913 time interleaver detection bug */ |
| inter_leave_len = (inter_leave_len == TIM_MIDDLE) ? 0x60 : 0x40; |
| detected_param &= CF_MASK | SC_MASK | LGS_FEC_MASK; |
| detected_param |= inter_leave_len; |
| } |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) { |
| u8 t; |
| lgs8gxx_read_reg(priv, 0x19, &t); |
| t &= 0x81; |
| t |= detected_param << 1; |
| lgs8gxx_write_reg(priv, 0x19, t); |
| } else { |
| lgs8gxx_write_reg(priv, 0x7D, detected_param); |
| if (priv->config->prod == LGS8GXX_PROD_LGS8913) |
| lgs8gxx_write_reg(priv, 0xC0, detected_param); |
| } |
| /* lgs8gxx_soft_reset(priv); */ |
| |
| /* Enter manual mode */ |
| lgs8gxx_set_mode_manual(priv); |
| |
| switch (gi) { |
| case GI_945: |
| priv->curr_gi = 945; break; |
| case GI_595: |
| priv->curr_gi = 595; break; |
| case GI_420: |
| priv->curr_gi = 420; break; |
| default: |
| priv->curr_gi = 945; break; |
| } |
| } |
| |
| static int lgs8gxx_set_mpeg_mode(struct lgs8gxx_state *priv, |
| u8 serial, u8 clk_pol, u8 clk_gated) |
| { |
| int ret = 0; |
| u8 t, reg_addr; |
| |
| reg_addr = (priv->config->prod == LGS8GXX_PROD_LGS8G75) ? 0x30 : 0xC2; |
| ret = lgs8gxx_read_reg(priv, reg_addr, &t); |
| if (ret != 0) |
| return ret; |
| |
| t &= 0xF8; |
| t |= serial ? TS_SERIAL : TS_PARALLEL; |
| t |= clk_pol ? TS_CLK_INVERTED : TS_CLK_NORMAL; |
| t |= clk_gated ? TS_CLK_GATED : TS_CLK_FREERUN; |
| |
| ret = lgs8gxx_write_reg(priv, reg_addr, t); |
| if (ret != 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| /* A/D input peak-to-peak voltage range */ |
| static int lgs8g75_set_adc_vpp(struct lgs8gxx_state *priv, |
| u8 sel) |
| { |
| u8 r26 = 0x73, r27 = 0x90; |
| |
| if (priv->config->prod != LGS8GXX_PROD_LGS8G75) |
| return 0; |
| |
| r26 |= (sel & 0x01) << 7; |
| r27 |= (sel & 0x02) >> 1; |
| lgs8gxx_write_reg(priv, 0x26, r26); |
| lgs8gxx_write_reg(priv, 0x27, r27); |
| |
| return 0; |
| } |
| |
| /* LGS8913 demod frontend functions */ |
| |
| static int lgs8913_init(struct lgs8gxx_state *priv) |
| { |
| u8 t; |
| |
| /* LGS8913 specific */ |
| lgs8gxx_write_reg(priv, 0xc1, 0x3); |
| |
| lgs8gxx_read_reg(priv, 0x7c, &t); |
| lgs8gxx_write_reg(priv, 0x7c, (t&0x8c) | 0x3); |
| |
| /* LGS8913 specific */ |
| lgs8gxx_read_reg(priv, 0xc3, &t); |
| lgs8gxx_write_reg(priv, 0xc3, t&0x10); |
| |
| |
| return 0; |
| } |
| |
| static int lgs8g75_init_data(struct lgs8gxx_state *priv) |
| { |
| const struct firmware *fw; |
| int rc; |
| int i; |
| |
| rc = request_firmware(&fw, LGS8GXX_FIRMWARE, &priv->i2c->dev); |
| if (rc) |
| return rc; |
| |
| lgs8gxx_write_reg(priv, 0xC6, 0x40); |
| |
| lgs8gxx_write_reg(priv, 0x3D, 0x04); |
| lgs8gxx_write_reg(priv, 0x39, 0x00); |
| |
| lgs8gxx_write_reg(priv, 0x3A, 0x00); |
| lgs8gxx_write_reg(priv, 0x38, 0x00); |
| lgs8gxx_write_reg(priv, 0x3B, 0x00); |
| lgs8gxx_write_reg(priv, 0x38, 0x00); |
| |
| for (i = 0; i < fw->size; i++) { |
| lgs8gxx_write_reg(priv, 0x38, 0x00); |
| lgs8gxx_write_reg(priv, 0x3A, (u8)(i&0xff)); |
| lgs8gxx_write_reg(priv, 0x3B, (u8)(i>>8)); |
| lgs8gxx_write_reg(priv, 0x3C, fw->data[i]); |
| } |
| |
| lgs8gxx_write_reg(priv, 0x38, 0x00); |
| |
| release_firmware(fw); |
| return 0; |
| } |
| |
| static int lgs8gxx_init(struct dvb_frontend *fe) |
| { |
| struct lgs8gxx_state *priv = |
| (struct lgs8gxx_state *)fe->demodulator_priv; |
| const struct lgs8gxx_config *config = priv->config; |
| u8 data = 0; |
| s8 err; |
| dprintk("%s\n", __func__); |
| |
| lgs8gxx_read_reg(priv, 0, &data); |
| dprintk("reg 0 = 0x%02X\n", data); |
| |
| if (config->prod == LGS8GXX_PROD_LGS8G75) |
| lgs8g75_set_adc_vpp(priv, config->adc_vpp); |
| |
| /* Setup MPEG output format */ |
| err = lgs8gxx_set_mpeg_mode(priv, config->serial_ts, |
| config->ts_clk_pol, |
| config->ts_clk_gated); |
| if (err != 0) |
| return -EIO; |
| |
| if (config->prod == LGS8GXX_PROD_LGS8913) |
| lgs8913_init(priv); |
| lgs8gxx_set_if_freq(priv, priv->config->if_freq); |
| lgs8gxx_set_ad_mode(priv); |
| |
| return 0; |
| } |
| |
| static void lgs8gxx_release(struct dvb_frontend *fe) |
| { |
| struct lgs8gxx_state *state = fe->demodulator_priv; |
| dprintk("%s\n", __func__); |
| |
| kfree(state); |
| } |
| |
| |
| static int lgs8gxx_write(struct dvb_frontend *fe, const u8 buf[], int len) |
| { |
| struct lgs8gxx_state *priv = fe->demodulator_priv; |
| |
| if (len != 2) |
| return -EINVAL; |
| |
| return lgs8gxx_write_reg(priv, buf[0], buf[1]); |
| } |
| |
| static int lgs8gxx_set_fe(struct dvb_frontend *fe) |
| { |
| struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache; |
| struct lgs8gxx_state *priv = fe->demodulator_priv; |
| |
| dprintk("%s\n", __func__); |
| |
| /* set frequency */ |
| if (fe->ops.tuner_ops.set_params) { |
| fe->ops.tuner_ops.set_params(fe); |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 0); |
| } |
| |
| /* start auto lock */ |
| lgs8gxx_auto_lock(priv); |
| |
| msleep(10); |
| |
| /* TODO: get real readings from device */ |
| |
| /* bandwidth */ |
| fe_params->bandwidth_hz = 8000000; |
| |
| fe_params->code_rate_HP = FEC_AUTO; |
| fe_params->code_rate_LP = FEC_AUTO; |
| |
| fe_params->modulation = QAM_AUTO; |
| |
| /* transmission mode */ |
| fe_params->transmission_mode = TRANSMISSION_MODE_AUTO; |
| |
| /* guard interval */ |
| fe_params->guard_interval = GUARD_INTERVAL_AUTO; |
| |
| /* hierarchy */ |
| fe_params->hierarchy = HIERARCHY_NONE; |
| |
| return 0; |
| } |
| |
| static |
| int lgs8gxx_get_tune_settings(struct dvb_frontend *fe, |
| struct dvb_frontend_tune_settings *fesettings) |
| { |
| /* FIXME: copy from tda1004x.c */ |
| fesettings->min_delay_ms = 800; |
| fesettings->step_size = 0; |
| fesettings->max_drift = 0; |
| return 0; |
| } |
| |
| static int lgs8gxx_read_status(struct dvb_frontend *fe, |
| enum fe_status *fe_status) |
| { |
| struct lgs8gxx_state *priv = fe->demodulator_priv; |
| s8 ret; |
| u8 t, locked = 0; |
| |
| dprintk("%s\n", __func__); |
| *fe_status = 0; |
| |
| lgs8gxx_get_afc_phase(priv); |
| lgs8gxx_is_locked(priv, &locked); |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) { |
| if (locked) |
| *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | |
| FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; |
| return 0; |
| } |
| |
| ret = lgs8gxx_read_reg(priv, 0x4B, &t); |
| if (ret != 0) |
| return -EIO; |
| |
| dprintk("Reg 0x4B: 0x%02X\n", t); |
| |
| *fe_status = 0; |
| if (priv->config->prod == LGS8GXX_PROD_LGS8913) { |
| if ((t & 0x40) == 0x40) |
| *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER; |
| if ((t & 0x80) == 0x80) |
| *fe_status |= FE_HAS_VITERBI | FE_HAS_SYNC | |
| FE_HAS_LOCK; |
| } else { |
| if ((t & 0x80) == 0x80) |
| *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | |
| FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; |
| } |
| |
| /* success */ |
| dprintk("%s: fe_status=0x%x\n", __func__, *fe_status); |
| return 0; |
| } |
| |
| static int lgs8gxx_read_signal_agc(struct lgs8gxx_state *priv, u16 *signal) |
| { |
| u16 v; |
| u8 agc_lvl[2], cat; |
| |
| dprintk("%s()\n", __func__); |
| lgs8gxx_read_reg(priv, 0x3F, &agc_lvl[0]); |
| lgs8gxx_read_reg(priv, 0x3E, &agc_lvl[1]); |
| |
| v = agc_lvl[0]; |
| v <<= 8; |
| v |= agc_lvl[1]; |
| |
| dprintk("agc_lvl: 0x%04X\n", v); |
| |
| if (v < 0x100) |
| cat = 0; |
| else if (v < 0x190) |
| cat = 5; |
| else if (v < 0x2A8) |
| cat = 4; |
| else if (v < 0x381) |
| cat = 3; |
| else if (v < 0x400) |
| cat = 2; |
| else if (v == 0x400) |
| cat = 1; |
| else |
| cat = 0; |
| |
| *signal = cat * 65535 / 5; |
| |
| return 0; |
| } |
| |
| static int lgs8913_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal) |
| { |
| u8 t; s8 ret; |
| s16 max_strength = 0; |
| u8 str; |
| u16 i, gi = priv->curr_gi; |
| |
| dprintk("%s\n", __func__); |
| |
| ret = lgs8gxx_read_reg(priv, 0x4B, &t); |
| if (ret != 0) |
| return -EIO; |
| |
| if (fake_signal_str) { |
| if ((t & 0xC0) == 0xC0) { |
| dprintk("Fake signal strength\n"); |
| *signal = 0x7FFF; |
| } else |
| *signal = 0; |
| return 0; |
| } |
| |
| dprintk("gi = %d\n", gi); |
| for (i = 0; i < gi; i++) { |
| |
| if ((i & 0xFF) == 0) |
| lgs8gxx_write_reg(priv, 0x84, 0x03 & (i >> 8)); |
| lgs8gxx_write_reg(priv, 0x83, i & 0xFF); |
| |
| lgs8gxx_read_reg(priv, 0x94, &str); |
| if (max_strength < str) |
| max_strength = str; |
| } |
| |
| *signal = max_strength; |
| dprintk("%s: signal=0x%02X\n", __func__, *signal); |
| |
| lgs8gxx_read_reg(priv, 0x95, &t); |
| dprintk("%s: AVG Noise=0x%02X\n", __func__, t); |
| |
| return 0; |
| } |
| |
| static int lgs8g75_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal) |
| { |
| u8 t; |
| s16 v = 0; |
| |
| dprintk("%s\n", __func__); |
| |
| lgs8gxx_read_reg(priv, 0xB1, &t); |
| v |= t; |
| v <<= 8; |
| lgs8gxx_read_reg(priv, 0xB0, &t); |
| v |= t; |
| |
| *signal = v; |
| dprintk("%s: signal=0x%02X\n", __func__, *signal); |
| |
| return 0; |
| } |
| |
| static int lgs8gxx_read_signal_strength(struct dvb_frontend *fe, u16 *signal) |
| { |
| struct lgs8gxx_state *priv = fe->demodulator_priv; |
| |
| if (priv->config->prod == LGS8GXX_PROD_LGS8913) |
| return lgs8913_read_signal_strength(priv, signal); |
| else if (priv->config->prod == LGS8GXX_PROD_LGS8G75) |
| return lgs8g75_read_signal_strength(priv, signal); |
| else |
| return lgs8gxx_read_signal_agc(priv, signal); |
| } |
| |
| static int lgs8gxx_read_snr(struct dvb_frontend *fe, u16 *snr) |
| { |
| struct lgs8gxx_state *priv = fe->demodulator_priv; |
| u8 t; |
| *snr = 0; |
| |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) |
| lgs8gxx_read_reg(priv, 0x34, &t); |
| else |
| lgs8gxx_read_reg(priv, 0x95, &t); |
| dprintk("AVG Noise=0x%02X\n", t); |
| *snr = 256 - t; |
| *snr <<= 8; |
| dprintk("snr=0x%x\n", *snr); |
| |
| return 0; |
| } |
| |
| static int lgs8gxx_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) |
| { |
| *ucblocks = 0; |
| dprintk("%s: ucblocks=0x%x\n", __func__, *ucblocks); |
| return 0; |
| } |
| |
| static void packet_counter_start(struct lgs8gxx_state *priv) |
| { |
| u8 orig, t; |
| |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) { |
| lgs8gxx_read_reg(priv, 0x30, &orig); |
| orig &= 0xE7; |
| t = orig | 0x10; |
| lgs8gxx_write_reg(priv, 0x30, t); |
| t = orig | 0x18; |
| lgs8gxx_write_reg(priv, 0x30, t); |
| t = orig | 0x10; |
| lgs8gxx_write_reg(priv, 0x30, t); |
| } else { |
| lgs8gxx_write_reg(priv, 0xC6, 0x01); |
| lgs8gxx_write_reg(priv, 0xC6, 0x41); |
| lgs8gxx_write_reg(priv, 0xC6, 0x01); |
| } |
| } |
| |
| static void packet_counter_stop(struct lgs8gxx_state *priv) |
| { |
| u8 t; |
| |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) { |
| lgs8gxx_read_reg(priv, 0x30, &t); |
| t &= 0xE7; |
| lgs8gxx_write_reg(priv, 0x30, t); |
| } else { |
| lgs8gxx_write_reg(priv, 0xC6, 0x81); |
| } |
| } |
| |
| static int lgs8gxx_read_ber(struct dvb_frontend *fe, u32 *ber) |
| { |
| struct lgs8gxx_state *priv = fe->demodulator_priv; |
| u8 reg_err, reg_total, t; |
| u32 total_cnt = 0, err_cnt = 0; |
| int i; |
| |
| dprintk("%s\n", __func__); |
| |
| packet_counter_start(priv); |
| msleep(200); |
| packet_counter_stop(priv); |
| |
| if (priv->config->prod == LGS8GXX_PROD_LGS8G75) { |
| reg_total = 0x28; reg_err = 0x2C; |
| } else { |
| reg_total = 0xD0; reg_err = 0xD4; |
| } |
| |
| for (i = 0; i < 4; i++) { |
| total_cnt <<= 8; |
| lgs8gxx_read_reg(priv, reg_total+3-i, &t); |
| total_cnt |= t; |
| } |
| for (i = 0; i < 4; i++) { |
| err_cnt <<= 8; |
| lgs8gxx_read_reg(priv, reg_err+3-i, &t); |
| err_cnt |= t; |
| } |
| dprintk("error=%d total=%d\n", err_cnt, total_cnt); |
| |
| if (total_cnt == 0) |
| *ber = 0; |
| else |
| *ber = err_cnt * 100 / total_cnt; |
| |
| dprintk("%s: ber=0x%x\n", __func__, *ber); |
| return 0; |
| } |
| |
| static int lgs8gxx_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) |
| { |
| struct lgs8gxx_state *priv = fe->demodulator_priv; |
| |
| if (priv->config->tuner_address == 0) |
| return 0; |
| if (enable) { |
| u8 v = 0x80 | priv->config->tuner_address; |
| return lgs8gxx_write_reg(priv, 0x01, v); |
| } |
| return lgs8gxx_write_reg(priv, 0x01, 0); |
| } |
| |
| static const struct dvb_frontend_ops lgs8gxx_ops = { |
| .delsys = { SYS_DTMB }, |
| .info = { |
| .name = "Legend Silicon LGS8913/LGS8GXX DMB-TH", |
| .frequency_min = 474000000, |
| .frequency_max = 858000000, |
| .frequency_stepsize = 10000, |
| .caps = |
| FE_CAN_FEC_AUTO | |
| FE_CAN_QAM_AUTO | |
| FE_CAN_TRANSMISSION_MODE_AUTO | |
| FE_CAN_GUARD_INTERVAL_AUTO |
| }, |
| |
| .release = lgs8gxx_release, |
| |
| .init = lgs8gxx_init, |
| .write = lgs8gxx_write, |
| .i2c_gate_ctrl = lgs8gxx_i2c_gate_ctrl, |
| |
| .set_frontend = lgs8gxx_set_fe, |
| .get_tune_settings = lgs8gxx_get_tune_settings, |
| |
| .read_status = lgs8gxx_read_status, |
| .read_ber = lgs8gxx_read_ber, |
| .read_signal_strength = lgs8gxx_read_signal_strength, |
| .read_snr = lgs8gxx_read_snr, |
| .read_ucblocks = lgs8gxx_read_ucblocks, |
| }; |
| |
| struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config, |
| struct i2c_adapter *i2c) |
| { |
| struct lgs8gxx_state *priv = NULL; |
| u8 data = 0; |
| |
| dprintk("%s()\n", __func__); |
| |
| if (config == NULL || i2c == NULL) |
| return NULL; |
| |
| priv = kzalloc(sizeof(struct lgs8gxx_state), GFP_KERNEL); |
| if (priv == NULL) |
| goto error_out; |
| |
| priv->config = config; |
| priv->i2c = i2c; |
| |
| /* check if the demod is there */ |
| if (lgs8gxx_read_reg(priv, 0, &data) != 0) { |
| dprintk("%s lgs8gxx not found at i2c addr 0x%02X\n", |
| __func__, priv->config->demod_address); |
| goto error_out; |
| } |
| |
| lgs8gxx_read_reg(priv, 1, &data); |
| |
| memcpy(&priv->frontend.ops, &lgs8gxx_ops, |
| sizeof(struct dvb_frontend_ops)); |
| priv->frontend.demodulator_priv = priv; |
| |
| if (config->prod == LGS8GXX_PROD_LGS8G75) |
| lgs8g75_init_data(priv); |
| |
| return &priv->frontend; |
| |
| error_out: |
| dprintk("%s() error_out\n", __func__); |
| kfree(priv); |
| return NULL; |
| |
| } |
| EXPORT_SYMBOL(lgs8gxx_attach); |
| |
| MODULE_DESCRIPTION("Legend Silicon LGS8913/LGS8GXX DMB-TH demodulator driver"); |
| MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_FIRMWARE(LGS8GXX_FIRMWARE); |
