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path: root/drivers/media/dvb/frontends/s5h1411.c
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Diffstat (limited to 'drivers/media/dvb/frontends/s5h1411.c')
-rw-r--r--drivers/media/dvb/frontends/s5h1411.c951
1 files changed, 951 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/s5h1411.c b/drivers/media/dvb/frontends/s5h1411.c
new file mode 100644
index 00000000..6cc4b7a9
--- /dev/null
+++ b/drivers/media/dvb/frontends/s5h1411.c
@@ -0,0 +1,951 @@
+/*
+ Samsung S5H1411 VSB/QAM demodulator driver
+
+ Copyright (C) 2008 Steven Toth <stoth@linuxtv.org>
+
+ 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/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include "dvb_frontend.h"
+#include "s5h1411.h"
+
+struct s5h1411_state {
+
+ struct i2c_adapter *i2c;
+
+ /* configuration settings */
+ const struct s5h1411_config *config;
+
+ struct dvb_frontend frontend;
+
+ fe_modulation_t current_modulation;
+ unsigned int first_tune:1;
+
+ u32 current_frequency;
+ int if_freq;
+
+ u8 inversion;
+};
+
+static int debug;
+
+#define dprintk(arg...) do { \
+ if (debug) \
+ printk(arg); \
+ } while (0)
+
+/* Register values to initialise the demod, defaults to VSB */
+static struct init_tab {
+ u8 addr;
+ u8 reg;
+ u16 data;
+} init_tab[] = {
+ { S5H1411_I2C_TOP_ADDR, 0x00, 0x0071, },
+ { S5H1411_I2C_TOP_ADDR, 0x08, 0x0047, },
+ { S5H1411_I2C_TOP_ADDR, 0x1c, 0x0400, },
+ { S5H1411_I2C_TOP_ADDR, 0x1e, 0x0370, },
+ { S5H1411_I2C_TOP_ADDR, 0x1f, 0x342c, },
+ { S5H1411_I2C_TOP_ADDR, 0x24, 0x0231, },
+ { S5H1411_I2C_TOP_ADDR, 0x25, 0x1011, },
+ { S5H1411_I2C_TOP_ADDR, 0x26, 0x0f07, },
+ { S5H1411_I2C_TOP_ADDR, 0x27, 0x0f04, },
+ { S5H1411_I2C_TOP_ADDR, 0x28, 0x070f, },
+ { S5H1411_I2C_TOP_ADDR, 0x29, 0x2820, },
+ { S5H1411_I2C_TOP_ADDR, 0x2a, 0x102e, },
+ { S5H1411_I2C_TOP_ADDR, 0x2b, 0x0220, },
+ { S5H1411_I2C_TOP_ADDR, 0x2e, 0x0d0e, },
+ { S5H1411_I2C_TOP_ADDR, 0x2f, 0x1013, },
+ { S5H1411_I2C_TOP_ADDR, 0x31, 0x171b, },
+ { S5H1411_I2C_TOP_ADDR, 0x32, 0x0e0f, },
+ { S5H1411_I2C_TOP_ADDR, 0x33, 0x0f10, },
+ { S5H1411_I2C_TOP_ADDR, 0x34, 0x170e, },
+ { S5H1411_I2C_TOP_ADDR, 0x35, 0x4b10, },
+ { S5H1411_I2C_TOP_ADDR, 0x36, 0x0f17, },
+ { S5H1411_I2C_TOP_ADDR, 0x3c, 0x1577, },
+ { S5H1411_I2C_TOP_ADDR, 0x3d, 0x081a, },
+ { S5H1411_I2C_TOP_ADDR, 0x3e, 0x77ee, },
+ { S5H1411_I2C_TOP_ADDR, 0x40, 0x1e09, },
+ { S5H1411_I2C_TOP_ADDR, 0x41, 0x0f0c, },
+ { S5H1411_I2C_TOP_ADDR, 0x42, 0x1f10, },
+ { S5H1411_I2C_TOP_ADDR, 0x4d, 0x0509, },
+ { S5H1411_I2C_TOP_ADDR, 0x4e, 0x0a00, },
+ { S5H1411_I2C_TOP_ADDR, 0x50, 0x0000, },
+ { S5H1411_I2C_TOP_ADDR, 0x5b, 0x0000, },
+ { S5H1411_I2C_TOP_ADDR, 0x5c, 0x0008, },
+ { S5H1411_I2C_TOP_ADDR, 0x57, 0x1101, },
+ { S5H1411_I2C_TOP_ADDR, 0x65, 0x007c, },
+ { S5H1411_I2C_TOP_ADDR, 0x68, 0x0512, },
+ { S5H1411_I2C_TOP_ADDR, 0x69, 0x0258, },
+ { S5H1411_I2C_TOP_ADDR, 0x70, 0x0004, },
+ { S5H1411_I2C_TOP_ADDR, 0x71, 0x0007, },
+ { S5H1411_I2C_TOP_ADDR, 0x76, 0x00a9, },
+ { S5H1411_I2C_TOP_ADDR, 0x78, 0x3141, },
+ { S5H1411_I2C_TOP_ADDR, 0x7a, 0x3141, },
+ { S5H1411_I2C_TOP_ADDR, 0xb3, 0x8003, },
+ { S5H1411_I2C_TOP_ADDR, 0xb5, 0xa6bb, },
+ { S5H1411_I2C_TOP_ADDR, 0xb6, 0x0609, },
+ { S5H1411_I2C_TOP_ADDR, 0xb7, 0x2f06, },
+ { S5H1411_I2C_TOP_ADDR, 0xb8, 0x003f, },
+ { S5H1411_I2C_TOP_ADDR, 0xb9, 0x2700, },
+ { S5H1411_I2C_TOP_ADDR, 0xba, 0xfac8, },
+ { S5H1411_I2C_TOP_ADDR, 0xbe, 0x1003, },
+ { S5H1411_I2C_TOP_ADDR, 0xbf, 0x103f, },
+ { S5H1411_I2C_TOP_ADDR, 0xce, 0x2000, },
+ { S5H1411_I2C_TOP_ADDR, 0xcf, 0x0800, },
+ { S5H1411_I2C_TOP_ADDR, 0xd0, 0x0800, },
+ { S5H1411_I2C_TOP_ADDR, 0xd1, 0x0400, },
+ { S5H1411_I2C_TOP_ADDR, 0xd2, 0x0800, },
+ { S5H1411_I2C_TOP_ADDR, 0xd3, 0x2000, },
+ { S5H1411_I2C_TOP_ADDR, 0xd4, 0x3000, },
+ { S5H1411_I2C_TOP_ADDR, 0xdb, 0x4a9b, },
+ { S5H1411_I2C_TOP_ADDR, 0xdc, 0x1000, },
+ { S5H1411_I2C_TOP_ADDR, 0xde, 0x0001, },
+ { S5H1411_I2C_TOP_ADDR, 0xdf, 0x0000, },
+ { S5H1411_I2C_TOP_ADDR, 0xe3, 0x0301, },
+ { S5H1411_I2C_QAM_ADDR, 0xf3, 0x0000, },
+ { S5H1411_I2C_QAM_ADDR, 0xf3, 0x0001, },
+ { S5H1411_I2C_QAM_ADDR, 0x08, 0x0600, },
+ { S5H1411_I2C_QAM_ADDR, 0x18, 0x4201, },
+ { S5H1411_I2C_QAM_ADDR, 0x1e, 0x6476, },
+ { S5H1411_I2C_QAM_ADDR, 0x21, 0x0830, },
+ { S5H1411_I2C_QAM_ADDR, 0x0c, 0x5679, },
+ { S5H1411_I2C_QAM_ADDR, 0x0d, 0x579b, },
+ { S5H1411_I2C_QAM_ADDR, 0x24, 0x0102, },
+ { S5H1411_I2C_QAM_ADDR, 0x31, 0x7488, },
+ { S5H1411_I2C_QAM_ADDR, 0x32, 0x0a08, },
+ { S5H1411_I2C_QAM_ADDR, 0x3d, 0x8689, },
+ { S5H1411_I2C_QAM_ADDR, 0x49, 0x0048, },
+ { S5H1411_I2C_QAM_ADDR, 0x57, 0x2012, },
+ { S5H1411_I2C_QAM_ADDR, 0x5d, 0x7676, },
+ { S5H1411_I2C_QAM_ADDR, 0x04, 0x0400, },
+ { S5H1411_I2C_QAM_ADDR, 0x58, 0x00c0, },
+ { S5H1411_I2C_QAM_ADDR, 0x5b, 0x0100, },
+};
+
+/* VSB SNR lookup table */
+static struct vsb_snr_tab {
+ u16 val;
+ u16 data;
+} vsb_snr_tab[] = {
+ { 0x39f, 300, },
+ { 0x39b, 295, },
+ { 0x397, 290, },
+ { 0x394, 285, },
+ { 0x38f, 280, },
+ { 0x38b, 275, },
+ { 0x387, 270, },
+ { 0x382, 265, },
+ { 0x37d, 260, },
+ { 0x377, 255, },
+ { 0x370, 250, },
+ { 0x36a, 245, },
+ { 0x364, 240, },
+ { 0x35b, 235, },
+ { 0x353, 230, },
+ { 0x349, 225, },
+ { 0x340, 320, },
+ { 0x337, 215, },
+ { 0x327, 210, },
+ { 0x31b, 205, },
+ { 0x310, 200, },
+ { 0x302, 195, },
+ { 0x2f3, 190, },
+ { 0x2e4, 185, },
+ { 0x2d7, 180, },
+ { 0x2cd, 175, },
+ { 0x2bb, 170, },
+ { 0x2a9, 165, },
+ { 0x29e, 160, },
+ { 0x284, 155, },
+ { 0x27a, 150, },
+ { 0x260, 145, },
+ { 0x23a, 140, },
+ { 0x224, 135, },
+ { 0x213, 130, },
+ { 0x204, 125, },
+ { 0x1fe, 120, },
+ { 0, 0, },
+};
+
+/* QAM64 SNR lookup table */
+static struct qam64_snr_tab {
+ u16 val;
+ u16 data;
+} qam64_snr_tab[] = {
+ { 0x0001, 0, },
+ { 0x0af0, 300, },
+ { 0x0d80, 290, },
+ { 0x10a0, 280, },
+ { 0x14b5, 270, },
+ { 0x1590, 268, },
+ { 0x1680, 266, },
+ { 0x17b0, 264, },
+ { 0x18c0, 262, },
+ { 0x19b0, 260, },
+ { 0x1ad0, 258, },
+ { 0x1d00, 256, },
+ { 0x1da0, 254, },
+ { 0x1ef0, 252, },
+ { 0x2050, 250, },
+ { 0x20f0, 249, },
+ { 0x21d0, 248, },
+ { 0x22b0, 247, },
+ { 0x23a0, 246, },
+ { 0x2470, 245, },
+ { 0x24f0, 244, },
+ { 0x25a0, 243, },
+ { 0x26c0, 242, },
+ { 0x27b0, 241, },
+ { 0x28d0, 240, },
+ { 0x29b0, 239, },
+ { 0x2ad0, 238, },
+ { 0x2ba0, 237, },
+ { 0x2c80, 236, },
+ { 0x2d20, 235, },
+ { 0x2e00, 234, },
+ { 0x2f10, 233, },
+ { 0x3050, 232, },
+ { 0x3190, 231, },
+ { 0x3300, 230, },
+ { 0x3340, 229, },
+ { 0x3200, 228, },
+ { 0x3550, 227, },
+ { 0x3610, 226, },
+ { 0x3600, 225, },
+ { 0x3700, 224, },
+ { 0x3800, 223, },
+ { 0x3920, 222, },
+ { 0x3a20, 221, },
+ { 0x3b30, 220, },
+ { 0x3d00, 219, },
+ { 0x3e00, 218, },
+ { 0x4000, 217, },
+ { 0x4100, 216, },
+ { 0x4300, 215, },
+ { 0x4400, 214, },
+ { 0x4600, 213, },
+ { 0x4700, 212, },
+ { 0x4800, 211, },
+ { 0x4a00, 210, },
+ { 0x4b00, 209, },
+ { 0x4d00, 208, },
+ { 0x4f00, 207, },
+ { 0x5050, 206, },
+ { 0x5200, 205, },
+ { 0x53c0, 204, },
+ { 0x5450, 203, },
+ { 0x5650, 202, },
+ { 0x5820, 201, },
+ { 0x6000, 200, },
+ { 0xffff, 0, },
+};
+
+/* QAM256 SNR lookup table */
+static struct qam256_snr_tab {
+ u16 val;
+ u16 data;
+} qam256_snr_tab[] = {
+ { 0x0001, 0, },
+ { 0x0970, 400, },
+ { 0x0a90, 390, },
+ { 0x0b90, 380, },
+ { 0x0d90, 370, },
+ { 0x0ff0, 360, },
+ { 0x1240, 350, },
+ { 0x1345, 348, },
+ { 0x13c0, 346, },
+ { 0x14c0, 344, },
+ { 0x1500, 342, },
+ { 0x1610, 340, },
+ { 0x1700, 338, },
+ { 0x1800, 336, },
+ { 0x18b0, 334, },
+ { 0x1900, 332, },
+ { 0x1ab0, 330, },
+ { 0x1bc0, 328, },
+ { 0x1cb0, 326, },
+ { 0x1db0, 324, },
+ { 0x1eb0, 322, },
+ { 0x2030, 320, },
+ { 0x2200, 318, },
+ { 0x2280, 316, },
+ { 0x2410, 314, },
+ { 0x25b0, 312, },
+ { 0x27a0, 310, },
+ { 0x2840, 308, },
+ { 0x29d0, 306, },
+ { 0x2b10, 304, },
+ { 0x2d30, 302, },
+ { 0x2f20, 300, },
+ { 0x30c0, 298, },
+ { 0x3260, 297, },
+ { 0x32c0, 296, },
+ { 0x3300, 295, },
+ { 0x33b0, 294, },
+ { 0x34b0, 293, },
+ { 0x35a0, 292, },
+ { 0x3650, 291, },
+ { 0x3800, 290, },
+ { 0x3900, 289, },
+ { 0x3a50, 288, },
+ { 0x3b30, 287, },
+ { 0x3cb0, 286, },
+ { 0x3e20, 285, },
+ { 0x3fa0, 284, },
+ { 0x40a0, 283, },
+ { 0x41c0, 282, },
+ { 0x42f0, 281, },
+ { 0x44a0, 280, },
+ { 0x4600, 279, },
+ { 0x47b0, 278, },
+ { 0x4900, 277, },
+ { 0x4a00, 276, },
+ { 0x4ba0, 275, },
+ { 0x4d00, 274, },
+ { 0x4f00, 273, },
+ { 0x5000, 272, },
+ { 0x51f0, 272, },
+ { 0x53a0, 270, },
+ { 0x5520, 269, },
+ { 0x5700, 268, },
+ { 0x5800, 267, },
+ { 0x5a00, 266, },
+ { 0x5c00, 265, },
+ { 0x5d00, 264, },
+ { 0x5f00, 263, },
+ { 0x6000, 262, },
+ { 0x6200, 261, },
+ { 0x6400, 260, },
+ { 0xffff, 0, },
+};
+
+/* 8 bit registers, 16 bit values */
+static int s5h1411_writereg(struct s5h1411_state *state,
+ u8 addr, u8 reg, u16 data)
+{
+ int ret;
+ u8 buf[] = { reg, data >> 8, data & 0xff };
+
+ struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = buf, .len = 3 };
+
+ ret = i2c_transfer(state->i2c, &msg, 1);
+
+ if (ret != 1)
+ printk(KERN_ERR "%s: writereg error 0x%02x 0x%02x 0x%04x, "
+ "ret == %i)\n", __func__, addr, reg, data, ret);
+
+ return (ret != 1) ? -1 : 0;
+}
+
+static u16 s5h1411_readreg(struct s5h1411_state *state, u8 addr, u8 reg)
+{
+ int ret;
+ u8 b0[] = { reg };
+ u8 b1[] = { 0, 0 };
+
+ struct i2c_msg msg[] = {
+ { .addr = addr, .flags = 0, .buf = b0, .len = 1 },
+ { .addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 2 } };
+
+ ret = i2c_transfer(state->i2c, msg, 2);
+
+ if (ret != 2)
+ printk(KERN_ERR "%s: readreg error (ret == %i)\n",
+ __func__, ret);
+ return (b1[0] << 8) | b1[1];
+}
+
+static int s5h1411_softreset(struct dvb_frontend *fe)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+
+ dprintk("%s()\n", __func__);
+
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf7, 0);
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf7, 1);
+ return 0;
+}
+
+static int s5h1411_set_if_freq(struct dvb_frontend *fe, int KHz)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+
+ dprintk("%s(%d KHz)\n", __func__, KHz);
+
+ switch (KHz) {
+ case 3250:
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x38, 0x10d5);
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x39, 0x5342);
+ s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x2c, 0x10d9);
+ break;
+ case 3500:
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x38, 0x1225);
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x39, 0x1e96);
+ s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x2c, 0x1225);
+ break;
+ case 4000:
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x38, 0x14bc);
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x39, 0xb53e);
+ s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x2c, 0x14bd);
+ break;
+ default:
+ dprintk("%s(%d KHz) Invalid, defaulting to 5380\n",
+ __func__, KHz);
+ /* no break, need to continue */
+ case 5380:
+ case 44000:
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x38, 0x1be4);
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x39, 0x3655);
+ s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x2c, 0x1be4);
+ break;
+ }
+
+ state->if_freq = KHz;
+
+ return 0;
+}
+
+static int s5h1411_set_mpeg_timing(struct dvb_frontend *fe, int mode)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+ u16 val;
+
+ dprintk("%s(%d)\n", __func__, mode);
+
+ val = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xbe) & 0xcfff;
+ switch (mode) {
+ case S5H1411_MPEGTIMING_CONTINOUS_INVERTING_CLOCK:
+ val |= 0x0000;
+ break;
+ case S5H1411_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK:
+ dprintk("%s(%d) Mode1 or Defaulting\n", __func__, mode);
+ val |= 0x1000;
+ break;
+ case S5H1411_MPEGTIMING_NONCONTINOUS_INVERTING_CLOCK:
+ val |= 0x2000;
+ break;
+ case S5H1411_MPEGTIMING_NONCONTINOUS_NONINVERTING_CLOCK:
+ val |= 0x3000;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Configure MPEG Signal Timing charactistics */
+ return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xbe, val);
+}
+
+static int s5h1411_set_spectralinversion(struct dvb_frontend *fe, int inversion)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+ u16 val;
+
+ dprintk("%s(%d)\n", __func__, inversion);
+ val = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0x24) & ~0x1000;
+
+ if (inversion == 1)
+ val |= 0x1000; /* Inverted */
+
+ state->inversion = inversion;
+ return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x24, val);
+}
+
+static int s5h1411_set_serialmode(struct dvb_frontend *fe, int serial)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+ u16 val;
+
+ dprintk("%s(%d)\n", __func__, serial);
+ val = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xbd) & ~0x100;
+
+ if (serial == 1)
+ val |= 0x100;
+
+ return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xbd, val);
+}
+
+static int s5h1411_enable_modulation(struct dvb_frontend *fe,
+ fe_modulation_t m)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+
+ dprintk("%s(0x%08x)\n", __func__, m);
+
+ if ((state->first_tune == 0) && (m == state->current_modulation)) {
+ dprintk("%s() Already at desired modulation. Skipping...\n",
+ __func__);
+ return 0;
+ }
+
+ switch (m) {
+ case VSB_8:
+ dprintk("%s() VSB_8\n", __func__);
+ s5h1411_set_if_freq(fe, state->config->vsb_if);
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x00, 0x71);
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf6, 0x00);
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xcd, 0xf1);
+ break;
+ case QAM_64:
+ case QAM_256:
+ case QAM_AUTO:
+ dprintk("%s() QAM_AUTO (64/256)\n", __func__);
+ s5h1411_set_if_freq(fe, state->config->qam_if);
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x00, 0x0171);
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf6, 0x0001);
+ s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x16, 0x1101);
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xcd, 0x00f0);
+ break;
+ default:
+ dprintk("%s() Invalid modulation\n", __func__);
+ return -EINVAL;
+ }
+
+ state->current_modulation = m;
+ state->first_tune = 0;
+ s5h1411_softreset(fe);
+
+ return 0;
+}
+
+static int s5h1411_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+
+ dprintk("%s(%d)\n", __func__, enable);
+
+ if (enable)
+ return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf5, 1);
+ else
+ return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf5, 0);
+}
+
+static int s5h1411_set_gpio(struct dvb_frontend *fe, int enable)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+ u16 val;
+
+ dprintk("%s(%d)\n", __func__, enable);
+
+ val = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xe0) & ~0x02;
+
+ if (enable)
+ return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xe0,
+ val | 0x02);
+ else
+ return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xe0, val);
+}
+
+static int s5h1411_set_powerstate(struct dvb_frontend *fe, int enable)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+
+ dprintk("%s(%d)\n", __func__, enable);
+
+ if (enable)
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf4, 1);
+ else {
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf4, 0);
+ s5h1411_softreset(fe);
+ }
+
+ return 0;
+}
+
+static int s5h1411_sleep(struct dvb_frontend *fe)
+{
+ return s5h1411_set_powerstate(fe, 1);
+}
+
+static int s5h1411_register_reset(struct dvb_frontend *fe)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+
+ dprintk("%s()\n", __func__);
+
+ return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf3, 0);
+}
+
+/* Talk to the demod, set the FEC, GUARD, QAM settings etc */
+static int s5h1411_set_frontend(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ struct s5h1411_state *state = fe->demodulator_priv;
+
+ dprintk("%s(frequency=%d)\n", __func__, p->frequency);
+
+ s5h1411_softreset(fe);
+
+ state->current_frequency = p->frequency;
+
+ s5h1411_enable_modulation(fe, p->modulation);
+
+ if (fe->ops.tuner_ops.set_params) {
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ fe->ops.tuner_ops.set_params(fe);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+ }
+
+ /* Issue a reset to the demod so it knows to resync against the
+ newly tuned frequency */
+ s5h1411_softreset(fe);
+
+ return 0;
+}
+
+/* Reset the demod hardware and reset all of the configuration registers
+ to a default state. */
+static int s5h1411_init(struct dvb_frontend *fe)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+ int i;
+
+ dprintk("%s()\n", __func__);
+
+ s5h1411_set_powerstate(fe, 0);
+ s5h1411_register_reset(fe);
+
+ for (i = 0; i < ARRAY_SIZE(init_tab); i++)
+ s5h1411_writereg(state, init_tab[i].addr,
+ init_tab[i].reg,
+ init_tab[i].data);
+
+ /* The datasheet says that after initialisation, VSB is default */
+ state->current_modulation = VSB_8;
+
+ /* Although the datasheet says it's in VSB, empirical evidence
+ shows problems getting lock on the first tuning request. Make
+ sure we call enable_modulation the first time around */
+ state->first_tune = 1;
+
+ if (state->config->output_mode == S5H1411_SERIAL_OUTPUT)
+ /* Serial */
+ s5h1411_set_serialmode(fe, 1);
+ else
+ /* Parallel */
+ s5h1411_set_serialmode(fe, 0);
+
+ s5h1411_set_spectralinversion(fe, state->config->inversion);
+ s5h1411_set_if_freq(fe, state->config->vsb_if);
+ s5h1411_set_gpio(fe, state->config->gpio);
+ s5h1411_set_mpeg_timing(fe, state->config->mpeg_timing);
+ s5h1411_softreset(fe);
+
+ /* Note: Leaving the I2C gate closed. */
+ s5h1411_i2c_gate_ctrl(fe, 0);
+
+ return 0;
+}
+
+static int s5h1411_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+ u16 reg;
+ u32 tuner_status = 0;
+
+ *status = 0;
+
+ /* Register F2 bit 15 = Master Lock, removed */
+
+ switch (state->current_modulation) {
+ case QAM_64:
+ case QAM_256:
+ reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xf0);
+ if (reg & 0x10) /* QAM FEC Lock */
+ *status |= FE_HAS_SYNC | FE_HAS_LOCK;
+ if (reg & 0x100) /* QAM EQ Lock */
+ *status |= FE_HAS_VITERBI | FE_HAS_CARRIER | FE_HAS_SIGNAL;
+
+ break;
+ case VSB_8:
+ reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xf2);
+ if (reg & 0x1000) /* FEC Lock */
+ *status |= FE_HAS_SYNC | FE_HAS_LOCK;
+ if (reg & 0x2000) /* EQ Lock */
+ *status |= FE_HAS_VITERBI | FE_HAS_CARRIER | FE_HAS_SIGNAL;
+
+ reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0x53);
+ if (reg & 0x1) /* AFC Lock */
+ *status |= FE_HAS_SIGNAL;
+
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (state->config->status_mode) {
+ case S5H1411_DEMODLOCKING:
+ if (*status & FE_HAS_VITERBI)
+ *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
+ break;
+ case S5H1411_TUNERLOCKING:
+ /* Get the tuner status */
+ if (fe->ops.tuner_ops.get_status) {
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 1);
+
+ fe->ops.tuner_ops.get_status(fe, &tuner_status);
+
+ if (fe->ops.i2c_gate_ctrl)
+ fe->ops.i2c_gate_ctrl(fe, 0);
+ }
+ if (tuner_status)
+ *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
+ break;
+ }
+
+ dprintk("%s() status 0x%08x\n", __func__, *status);
+
+ return 0;
+}
+
+static int s5h1411_qam256_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v)
+{
+ int i, ret = -EINVAL;
+ dprintk("%s()\n", __func__);
+
+ for (i = 0; i < ARRAY_SIZE(qam256_snr_tab); i++) {
+ if (v < qam256_snr_tab[i].val) {
+ *snr = qam256_snr_tab[i].data;
+ ret = 0;
+ break;
+ }
+ }
+ return ret;
+}
+
+static int s5h1411_qam64_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v)
+{
+ int i, ret = -EINVAL;
+ dprintk("%s()\n", __func__);
+
+ for (i = 0; i < ARRAY_SIZE(qam64_snr_tab); i++) {
+ if (v < qam64_snr_tab[i].val) {
+ *snr = qam64_snr_tab[i].data;
+ ret = 0;
+ break;
+ }
+ }
+ return ret;
+}
+
+static int s5h1411_vsb_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v)
+{
+ int i, ret = -EINVAL;
+ dprintk("%s()\n", __func__);
+
+ for (i = 0; i < ARRAY_SIZE(vsb_snr_tab); i++) {
+ if (v > vsb_snr_tab[i].val) {
+ *snr = vsb_snr_tab[i].data;
+ ret = 0;
+ break;
+ }
+ }
+ dprintk("%s() snr=%d\n", __func__, *snr);
+ return ret;
+}
+
+static int s5h1411_read_snr(struct dvb_frontend *fe, u16 *snr)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+ u16 reg;
+ dprintk("%s()\n", __func__);
+
+ switch (state->current_modulation) {
+ case QAM_64:
+ reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xf1);
+ return s5h1411_qam64_lookup_snr(fe, snr, reg);
+ case QAM_256:
+ reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xf1);
+ return s5h1411_qam256_lookup_snr(fe, snr, reg);
+ case VSB_8:
+ reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR,
+ 0xf2) & 0x3ff;
+ return s5h1411_vsb_lookup_snr(fe, snr, reg);
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static int s5h1411_read_signal_strength(struct dvb_frontend *fe,
+ u16 *signal_strength)
+{
+ /* borrowed from lgdt330x.c
+ *
+ * Calculate strength from SNR up to 35dB
+ * Even though the SNR can go higher than 35dB,
+ * there is some comfort factor in having a range of
+ * strong signals that can show at 100%
+ */
+ u16 snr;
+ u32 tmp;
+ int ret = s5h1411_read_snr(fe, &snr);
+
+ *signal_strength = 0;
+
+ if (0 == ret) {
+ /* The following calculation method was chosen
+ * purely for the sake of code re-use from the
+ * other demod drivers that use this method */
+
+ /* Convert from SNR in dB * 10 to 8.24 fixed-point */
+ tmp = (snr * ((1 << 24) / 10));
+
+ /* Convert from 8.24 fixed-point to
+ * scale the range 0 - 35*2^24 into 0 - 65535*/
+ if (tmp >= 8960 * 0x10000)
+ *signal_strength = 0xffff;
+ else
+ *signal_strength = tmp / 8960;
+ }
+
+ return ret;
+}
+
+static int s5h1411_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+
+ *ucblocks = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xc9);
+
+ return 0;
+}
+
+static int s5h1411_read_ber(struct dvb_frontend *fe, u32 *ber)
+{
+ return s5h1411_read_ucblocks(fe, ber);
+}
+
+static int s5h1411_get_frontend(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ struct s5h1411_state *state = fe->demodulator_priv;
+
+ p->frequency = state->current_frequency;
+ p->modulation = state->current_modulation;
+
+ return 0;
+}
+
+static int s5h1411_get_tune_settings(struct dvb_frontend *fe,
+ struct dvb_frontend_tune_settings *tune)
+{
+ tune->min_delay_ms = 1000;
+ return 0;
+}
+
+static void s5h1411_release(struct dvb_frontend *fe)
+{
+ struct s5h1411_state *state = fe->demodulator_priv;
+ kfree(state);
+}
+
+static struct dvb_frontend_ops s5h1411_ops;
+
+struct dvb_frontend *s5h1411_attach(const struct s5h1411_config *config,
+ struct i2c_adapter *i2c)
+{
+ struct s5h1411_state *state = NULL;
+ u16 reg;
+
+ /* allocate memory for the internal state */
+ state = kzalloc(sizeof(struct s5h1411_state), GFP_KERNEL);
+ if (state == NULL)
+ goto error;
+
+ /* setup the state */
+ state->config = config;
+ state->i2c = i2c;
+ state->current_modulation = VSB_8;
+ state->inversion = state->config->inversion;
+
+ /* check if the demod exists */
+ reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0x05);
+ if (reg != 0x0066)
+ goto error;
+
+ /* create dvb_frontend */
+ memcpy(&state->frontend.ops, &s5h1411_ops,
+ sizeof(struct dvb_frontend_ops));
+
+ state->frontend.demodulator_priv = state;
+
+ if (s5h1411_init(&state->frontend) != 0) {
+ printk(KERN_ERR "%s: Failed to initialize correctly\n",
+ __func__);
+ goto error;
+ }
+
+ /* Note: Leaving the I2C gate open here. */
+ s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf5, 1);
+
+ /* Put the device into low-power mode until first use */
+ s5h1411_set_powerstate(&state->frontend, 1);
+
+ return &state->frontend;
+
+error:
+ kfree(state);
+ return NULL;
+}
+EXPORT_SYMBOL(s5h1411_attach);
+
+static struct dvb_frontend_ops s5h1411_ops = {
+ .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
+ .info = {
+ .name = "Samsung S5H1411 QAM/8VSB Frontend",
+ .frequency_min = 54000000,
+ .frequency_max = 858000000,
+ .frequency_stepsize = 62500,
+ .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
+ },
+
+ .init = s5h1411_init,
+ .sleep = s5h1411_sleep,
+ .i2c_gate_ctrl = s5h1411_i2c_gate_ctrl,
+ .set_frontend = s5h1411_set_frontend,
+ .get_frontend = s5h1411_get_frontend,
+ .get_tune_settings = s5h1411_get_tune_settings,
+ .read_status = s5h1411_read_status,
+ .read_ber = s5h1411_read_ber,
+ .read_signal_strength = s5h1411_read_signal_strength,
+ .read_snr = s5h1411_read_snr,
+ .read_ucblocks = s5h1411_read_ucblocks,
+ .release = s5h1411_release,
+};
+
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Enable verbose debug messages");
+
+MODULE_DESCRIPTION("Samsung S5H1411 QAM-B/ATSC Demodulator driver");
+MODULE_AUTHOR("Steven Toth");
+MODULE_LICENSE("GPL");
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ */
generated by cgit (git 2.34.1) at 2024-12-22 04:03:42 +0000