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Diffstat (limited to 'drivers/media/dvb-frontends/stb6100.c')
-rw-r--r--drivers/media/dvb-frontends/stb6100.c565
1 files changed, 565 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/stb6100.c b/drivers/media/dvb-frontends/stb6100.c
new file mode 100644
index 0000000000..c5818a15a0
--- /dev/null
+++ b/drivers/media/dvb-frontends/stb6100.c
@@ -0,0 +1,565 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ STB6100 Silicon Tuner
+ Copyright (C) Manu Abraham (abraham.manu@gmail.com)
+
+ Copyright (C) ST Microelectronics
+
+*/
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#include <media/dvb_frontend.h>
+#include "stb6100.h"
+
+static unsigned int verbose;
+module_param(verbose, int, 0644);
+
+/* Max transfer size done by I2C transfer functions */
+#define MAX_XFER_SIZE 64
+
+#define FE_ERROR 0
+#define FE_NOTICE 1
+#define FE_INFO 2
+#define FE_DEBUG 3
+
+#define dprintk(x, y, z, format, arg...) do { \
+ if (z) { \
+ if ((x > FE_ERROR) && (x > y)) \
+ printk(KERN_ERR "%s: " format "\n", __func__ , ##arg); \
+ else if ((x > FE_NOTICE) && (x > y)) \
+ printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg); \
+ else if ((x > FE_INFO) && (x > y)) \
+ printk(KERN_INFO "%s: " format "\n", __func__ , ##arg); \
+ else if ((x > FE_DEBUG) && (x > y)) \
+ printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg); \
+ } else { \
+ if (x > y) \
+ printk(format, ##arg); \
+ } \
+} while (0)
+
+struct stb6100_lkup {
+ u32 val_low;
+ u32 val_high;
+ u8 reg;
+};
+
+static void stb6100_release(struct dvb_frontend *fe);
+
+static const struct stb6100_lkup lkup[] = {
+ { 0, 950000, 0x0a },
+ { 950000, 1000000, 0x0a },
+ { 1000000, 1075000, 0x0c },
+ { 1075000, 1200000, 0x00 },
+ { 1200000, 1300000, 0x01 },
+ { 1300000, 1370000, 0x02 },
+ { 1370000, 1470000, 0x04 },
+ { 1470000, 1530000, 0x05 },
+ { 1530000, 1650000, 0x06 },
+ { 1650000, 1800000, 0x08 },
+ { 1800000, 1950000, 0x0a },
+ { 1950000, 2150000, 0x0c },
+ { 2150000, 9999999, 0x0c },
+ { 0, 0, 0x00 }
+};
+
+/* Register names for easy debugging. */
+static const char *stb6100_regnames[] = {
+ [STB6100_LD] = "LD",
+ [STB6100_VCO] = "VCO",
+ [STB6100_NI] = "NI",
+ [STB6100_NF_LSB] = "NF",
+ [STB6100_K] = "K",
+ [STB6100_G] = "G",
+ [STB6100_F] = "F",
+ [STB6100_DLB] = "DLB",
+ [STB6100_TEST1] = "TEST1",
+ [STB6100_FCCK] = "FCCK",
+ [STB6100_LPEN] = "LPEN",
+ [STB6100_TEST3] = "TEST3",
+};
+
+/* Template for normalisation, i.e. setting unused or undocumented
+ * bits as required according to the documentation.
+ */
+struct stb6100_regmask {
+ u8 mask;
+ u8 set;
+};
+
+static const struct stb6100_regmask stb6100_template[] = {
+ [STB6100_LD] = { 0xff, 0x00 },
+ [STB6100_VCO] = { 0xff, 0x00 },
+ [STB6100_NI] = { 0xff, 0x00 },
+ [STB6100_NF_LSB] = { 0xff, 0x00 },
+ [STB6100_K] = { 0xc7, 0x38 },
+ [STB6100_G] = { 0xef, 0x10 },
+ [STB6100_F] = { 0x1f, 0xc0 },
+ [STB6100_DLB] = { 0x38, 0xc4 },
+ [STB6100_TEST1] = { 0x00, 0x8f },
+ [STB6100_FCCK] = { 0x40, 0x0d },
+ [STB6100_LPEN] = { 0xf0, 0x0b },
+ [STB6100_TEST3] = { 0x00, 0xde },
+};
+
+/*
+ * Currently unused. Some boards might need it in the future
+ */
+static __always_unused inline void stb6100_normalise_regs(u8 regs[])
+{
+ int i;
+
+ for (i = 0; i < STB6100_NUMREGS; i++)
+ regs[i] = (regs[i] & stb6100_template[i].mask) | stb6100_template[i].set;
+}
+
+static int stb6100_read_regs(struct stb6100_state *state, u8 regs[])
+{
+ int rc;
+ struct i2c_msg msg = {
+ .addr = state->config->tuner_address,
+ .flags = I2C_M_RD,
+ .buf = regs,
+ .len = STB6100_NUMREGS
+ };
+
+ rc = i2c_transfer(state->i2c, &msg, 1);
+ if (unlikely(rc != 1)) {
+ dprintk(verbose, FE_ERROR, 1, "Read (0x%x) err, rc=[%d]",
+ state->config->tuner_address, rc);
+
+ return -EREMOTEIO;
+ }
+ if (unlikely(verbose > FE_DEBUG)) {
+ int i;
+
+ dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x", state->config->tuner_address);
+ for (i = 0; i < STB6100_NUMREGS; i++)
+ dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[i], regs[i]);
+ }
+ return 0;
+}
+
+static int stb6100_read_reg(struct stb6100_state *state, u8 reg)
+{
+ u8 regs[STB6100_NUMREGS];
+
+ struct i2c_msg msg = {
+ .addr = state->config->tuner_address + reg,
+ .flags = I2C_M_RD,
+ .buf = regs,
+ .len = 1
+ };
+
+ i2c_transfer(state->i2c, &msg, 1);
+
+ if (unlikely(reg >= STB6100_NUMREGS)) {
+ dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
+ return -EINVAL;
+ }
+ if (unlikely(verbose > FE_DEBUG)) {
+ dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x", state->config->tuner_address);
+ dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[reg], regs[0]);
+ }
+
+ return (unsigned int)regs[0];
+}
+
+static int stb6100_write_reg_range(struct stb6100_state *state, u8 buf[], int start, int len)
+{
+ int rc;
+ u8 cmdbuf[MAX_XFER_SIZE];
+ struct i2c_msg msg = {
+ .addr = state->config->tuner_address,
+ .flags = 0,
+ .buf = cmdbuf,
+ .len = len + 1
+ };
+
+ if (1 + len > sizeof(cmdbuf)) {
+ printk(KERN_WARNING
+ "%s: i2c wr: len=%d is too big!\n",
+ KBUILD_MODNAME, len);
+ return -EINVAL;
+ }
+
+ if (unlikely(start < 1 || start + len > STB6100_NUMREGS)) {
+ dprintk(verbose, FE_ERROR, 1, "Invalid register range %d:%d",
+ start, len);
+ return -EINVAL;
+ }
+ memcpy(&cmdbuf[1], buf, len);
+ cmdbuf[0] = start;
+
+ if (unlikely(verbose > FE_DEBUG)) {
+ int i;
+
+ dprintk(verbose, FE_DEBUG, 1, " Write @ 0x%02x: [%d:%d]", state->config->tuner_address, start, len);
+ for (i = 0; i < len; i++)
+ dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[start + i], buf[i]);
+ }
+ rc = i2c_transfer(state->i2c, &msg, 1);
+ if (unlikely(rc != 1)) {
+ dprintk(verbose, FE_ERROR, 1, "(0x%x) write err [%d:%d], rc=[%d]",
+ (unsigned int)state->config->tuner_address, start, len, rc);
+ return -EREMOTEIO;
+ }
+ return 0;
+}
+
+static int stb6100_write_reg(struct stb6100_state *state, u8 reg, u8 data)
+{
+ u8 tmp = data; /* see gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 */
+
+ if (unlikely(reg >= STB6100_NUMREGS)) {
+ dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
+ return -EREMOTEIO;
+ }
+ tmp = (tmp & stb6100_template[reg].mask) | stb6100_template[reg].set;
+ return stb6100_write_reg_range(state, &tmp, reg, 1);
+}
+
+
+static int stb6100_get_status(struct dvb_frontend *fe, u32 *status)
+{
+ int rc;
+ struct stb6100_state *state = fe->tuner_priv;
+
+ rc = stb6100_read_reg(state, STB6100_LD);
+ if (rc < 0) {
+ dprintk(verbose, FE_ERROR, 1, "%s failed", __func__);
+ return rc;
+ }
+ return (rc & STB6100_LD_LOCK) ? TUNER_STATUS_LOCKED : 0;
+}
+
+static int stb6100_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
+{
+ int rc;
+ u8 f;
+ u32 bw;
+ struct stb6100_state *state = fe->tuner_priv;
+
+ rc = stb6100_read_reg(state, STB6100_F);
+ if (rc < 0)
+ return rc;
+ f = rc & STB6100_F_F;
+
+ bw = (f + 5) * 2000; /* x2 for ZIF */
+
+ *bandwidth = state->bandwidth = bw * 1000;
+ dprintk(verbose, FE_DEBUG, 1, "bandwidth = %u Hz", state->bandwidth);
+ return 0;
+}
+
+static int stb6100_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
+{
+ u32 tmp;
+ int rc;
+ struct stb6100_state *state = fe->tuner_priv;
+
+ dprintk(verbose, FE_DEBUG, 1, "set bandwidth to %u Hz", bandwidth);
+
+ bandwidth /= 2; /* ZIF */
+
+ if (bandwidth >= 36000000) /* F[4:0] BW/2 max =31+5=36 mhz for F=31 */
+ tmp = 31;
+ else if (bandwidth <= 5000000) /* bw/2 min = 5Mhz for F=0 */
+ tmp = 0;
+ else /* if 5 < bw/2 < 36 */
+ tmp = (bandwidth + 500000) / 1000000 - 5;
+
+ /* Turn on LPF bandwidth setting clock control,
+ * set bandwidth, wait 10ms, turn off.
+ */
+ rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d | STB6100_FCCK_FCCK);
+ if (rc < 0)
+ return rc;
+ rc = stb6100_write_reg(state, STB6100_F, 0xc0 | tmp);
+ if (rc < 0)
+ return rc;
+
+ msleep(5); /* This is dangerous as another (related) thread may start */
+
+ rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
+ if (rc < 0)
+ return rc;
+
+ msleep(10); /* This is dangerous as another (related) thread may start */
+
+ return 0;
+}
+
+static int stb6100_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+ int rc;
+ u32 nint, nfrac, fvco;
+ int psd2, odiv;
+ struct stb6100_state *state = fe->tuner_priv;
+ u8 regs[STB6100_NUMREGS];
+
+ rc = stb6100_read_regs(state, regs);
+ if (rc < 0)
+ return rc;
+
+ odiv = (regs[STB6100_VCO] & STB6100_VCO_ODIV) >> STB6100_VCO_ODIV_SHIFT;
+ psd2 = (regs[STB6100_K] & STB6100_K_PSD2) >> STB6100_K_PSD2_SHIFT;
+ nint = regs[STB6100_NI];
+ nfrac = ((regs[STB6100_K] & STB6100_K_NF_MSB) << 8) | regs[STB6100_NF_LSB];
+ fvco = (nfrac * state->reference >> (9 - psd2)) + (nint * state->reference << psd2);
+ *frequency = state->frequency = fvco >> (odiv + 1);
+
+ dprintk(verbose, FE_DEBUG, 1,
+ "frequency = %u kHz, odiv = %u, psd2 = %u, fxtal = %u kHz, fvco = %u kHz, N(I) = %u, N(F) = %u",
+ state->frequency, odiv, psd2, state->reference, fvco, nint, nfrac);
+ return 0;
+}
+
+
+static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
+{
+ int rc;
+ const struct stb6100_lkup *ptr;
+ struct stb6100_state *state = fe->tuner_priv;
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+
+ u32 srate = 0, fvco, nint, nfrac;
+ u8 regs[STB6100_NUMREGS];
+ u8 g, psd2, odiv;
+
+ dprintk(verbose, FE_DEBUG, 1, "Version 2010-8-14 13:51");
+
+ if (fe->ops.get_frontend) {
+ dprintk(verbose, FE_DEBUG, 1, "Get frontend parameters");
+ fe->ops.get_frontend(fe, p);
+ }
+ srate = p->symbol_rate;
+
+ /* Set up tuner cleanly, LPF calibration on */
+ rc = stb6100_write_reg(state, STB6100_FCCK, 0x4d | STB6100_FCCK_FCCK);
+ if (rc < 0)
+ return rc; /* allow LPF calibration */
+
+ /* PLL Loop disabled, bias on, VCO on, synth on */
+ regs[STB6100_LPEN] = 0xeb;
+ rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
+ if (rc < 0)
+ return rc;
+
+ /* Program the registers with their data values */
+
+ /* VCO divide ratio (LO divide ratio, VCO prescaler enable). */
+ if (frequency <= 1075000)
+ odiv = 1;
+ else
+ odiv = 0;
+
+ /* VCO enabled, search clock off as per LL3.7, 3.4.1 */
+ regs[STB6100_VCO] = 0xe0 | (odiv << STB6100_VCO_ODIV_SHIFT);
+
+ /* OSM */
+ for (ptr = lkup;
+ (ptr->val_high != 0) && !CHKRANGE(frequency, ptr->val_low, ptr->val_high);
+ ptr++);
+
+ if (ptr->val_high == 0) {
+ printk(KERN_ERR "%s: frequency out of range: %u kHz\n", __func__, frequency);
+ return -EINVAL;
+ }
+ regs[STB6100_VCO] = (regs[STB6100_VCO] & ~STB6100_VCO_OSM) | ptr->reg;
+ rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
+ if (rc < 0)
+ return rc;
+
+ if ((frequency > 1075000) && (frequency <= 1325000))
+ psd2 = 0;
+ else
+ psd2 = 1;
+ /* F(VCO) = F(LO) * (ODIV == 0 ? 2 : 4) */
+ fvco = frequency << (1 + odiv);
+ /* N(I) = floor(f(VCO) / (f(XTAL) * (PSD2 ? 2 : 1))) */
+ nint = fvco / (state->reference << psd2);
+ /* N(F) = round(f(VCO) / f(XTAL) * (PSD2 ? 2 : 1) - N(I)) * 2 ^ 9 */
+ nfrac = DIV_ROUND_CLOSEST((fvco - (nint * state->reference << psd2))
+ << (9 - psd2), state->reference);
+
+ /* NI */
+ regs[STB6100_NI] = nint;
+ rc = stb6100_write_reg(state, STB6100_NI, regs[STB6100_NI]);
+ if (rc < 0)
+ return rc;
+
+ /* NF */
+ regs[STB6100_NF_LSB] = nfrac;
+ rc = stb6100_write_reg(state, STB6100_NF_LSB, regs[STB6100_NF_LSB]);
+ if (rc < 0)
+ return rc;
+
+ /* K */
+ regs[STB6100_K] = (0x38 & ~STB6100_K_PSD2) | (psd2 << STB6100_K_PSD2_SHIFT);
+ regs[STB6100_K] = (regs[STB6100_K] & ~STB6100_K_NF_MSB) | ((nfrac >> 8) & STB6100_K_NF_MSB);
+ rc = stb6100_write_reg(state, STB6100_K, regs[STB6100_K]);
+ if (rc < 0)
+ return rc;
+
+ /* G Baseband gain. */
+ if (srate >= 15000000)
+ g = 9; /* +4 dB */
+ else if (srate >= 5000000)
+ g = 11; /* +8 dB */
+ else
+ g = 14; /* +14 dB */
+
+ regs[STB6100_G] = (0x10 & ~STB6100_G_G) | g;
+ regs[STB6100_G] &= ~STB6100_G_GCT; /* mask GCT */
+ regs[STB6100_G] |= (1 << 5); /* 2Vp-p Mode */
+ rc = stb6100_write_reg(state, STB6100_G, regs[STB6100_G]);
+ if (rc < 0)
+ return rc;
+
+ /* F we don't write as it is set up in BW set */
+
+ /* DLB set DC servo loop BW to 160Hz (LLA 3.8 / 2.1) */
+ regs[STB6100_DLB] = 0xcc;
+ rc = stb6100_write_reg(state, STB6100_DLB, regs[STB6100_DLB]);
+ if (rc < 0)
+ return rc;
+
+ dprintk(verbose, FE_DEBUG, 1,
+ "frequency = %u, srate = %u, g = %u, odiv = %u, psd2 = %u, fxtal = %u, osm = %u, fvco = %u, N(I) = %u, N(F) = %u",
+ frequency, srate, (unsigned int)g, (unsigned int)odiv,
+ (unsigned int)psd2, state->reference,
+ ptr->reg, fvco, nint, nfrac);
+
+ /* Set up the test registers */
+ regs[STB6100_TEST1] = 0x8f;
+ rc = stb6100_write_reg(state, STB6100_TEST1, regs[STB6100_TEST1]);
+ if (rc < 0)
+ return rc;
+ regs[STB6100_TEST3] = 0xde;
+ rc = stb6100_write_reg(state, STB6100_TEST3, regs[STB6100_TEST3]);
+ if (rc < 0)
+ return rc;
+
+ /* Bring up tuner according to LLA 3.7 3.4.1, step 2 */
+ regs[STB6100_LPEN] = 0xfb; /* PLL Loop enabled, bias on, VCO on, synth on */
+ rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
+ if (rc < 0)
+ return rc;
+
+ msleep(2);
+
+ /* Bring up tuner according to LLA 3.7 3.4.1, step 3 */
+ regs[STB6100_VCO] &= ~STB6100_VCO_OCK; /* VCO fast search */
+ rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
+ if (rc < 0)
+ return rc;
+
+ msleep(10); /* This is dangerous as another (related) thread may start */ /* wait for LO to lock */
+
+ regs[STB6100_VCO] &= ~STB6100_VCO_OSCH; /* vco search disabled */
+ regs[STB6100_VCO] |= STB6100_VCO_OCK; /* search clock off */
+ rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
+ if (rc < 0)
+ return rc;
+
+ rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
+ if (rc < 0)
+ return rc; /* Stop LPF calibration */
+
+ msleep(10); /* This is dangerous as another (related) thread may start */
+ /* wait for stabilisation, (should not be necessary) */
+ return 0;
+}
+
+static int stb6100_sleep(struct dvb_frontend *fe)
+{
+ /* TODO: power down */
+ return 0;
+}
+
+static int stb6100_init(struct dvb_frontend *fe)
+{
+ struct stb6100_state *state = fe->tuner_priv;
+ int refclk = 27000000; /* Hz */
+
+ /*
+ * iqsense = 1
+ * tunerstep = 125000
+ */
+ state->bandwidth = 36000000; /* Hz */
+ state->reference = refclk / 1000; /* kHz */
+
+ /* Set default bandwidth. Modified, PN 13-May-10 */
+ return 0;
+}
+
+static int stb6100_set_params(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+
+ if (c->frequency > 0)
+ stb6100_set_frequency(fe, c->frequency);
+
+ if (c->bandwidth_hz > 0)
+ stb6100_set_bandwidth(fe, c->bandwidth_hz);
+
+ return 0;
+}
+
+static const struct dvb_tuner_ops stb6100_ops = {
+ .info = {
+ .name = "STB6100 Silicon Tuner",
+ .frequency_min_hz = 950 * MHz,
+ .frequency_max_hz = 2150 * MHz,
+ },
+
+ .init = stb6100_init,
+ .sleep = stb6100_sleep,
+ .get_status = stb6100_get_status,
+ .set_params = stb6100_set_params,
+ .get_frequency = stb6100_get_frequency,
+ .get_bandwidth = stb6100_get_bandwidth,
+ .release = stb6100_release
+};
+
+struct dvb_frontend *stb6100_attach(struct dvb_frontend *fe,
+ const struct stb6100_config *config,
+ struct i2c_adapter *i2c)
+{
+ struct stb6100_state *state = NULL;
+
+ state = kzalloc(sizeof (struct stb6100_state), GFP_KERNEL);
+ if (!state)
+ return NULL;
+
+ state->config = config;
+ state->i2c = i2c;
+ state->frontend = fe;
+ state->reference = config->refclock / 1000; /* kHz */
+ fe->tuner_priv = state;
+ fe->ops.tuner_ops = stb6100_ops;
+
+ printk("%s: Attaching STB6100 \n", __func__);
+ return fe;
+}
+
+static void stb6100_release(struct dvb_frontend *fe)
+{
+ struct stb6100_state *state = fe->tuner_priv;
+
+ fe->tuner_priv = NULL;
+ kfree(state);
+}
+
+EXPORT_SYMBOL_GPL(stb6100_attach);
+MODULE_PARM_DESC(verbose, "Set Verbosity level");
+
+MODULE_AUTHOR("Manu Abraham");
+MODULE_DESCRIPTION("STB6100 Silicon tuner");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-01 08:43:54 +0000