summaryrefslogtreecommitdiffstats
path: root/drivers/media/dvb-frontends/s921.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/dvb-frontends/s921.c')
-rw-r--r--drivers/media/dvb-frontends/s921.c535
1 files changed, 535 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/s921.c b/drivers/media/dvb-frontends/s921.c
new file mode 100644
index 0000000000..7e461ac159
--- /dev/null
+++ b/drivers/media/dvb-frontends/s921.c
@@ -0,0 +1,535 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Sharp VA3A5JZ921 One Seg Broadcast Module driver
+ * This device is labeled as just S. 921 at the top of the frontend can
+ *
+ * Copyright (C) 2009-2010 Mauro Carvalho Chehab
+ * Copyright (C) 2009-2010 Douglas Landgraf <dougsland@redhat.com>
+ *
+ * Developed for Leadership SBTVD 1seg device sold in Brazil
+ *
+ * Frontend module based on cx24123 driver, getting some info from
+ * the old s921 driver.
+ *
+ * FIXME: Need to port to DVB v5.2 API
+ */
+
+#include <linux/kernel.h>
+#include <asm/div64.h>
+
+#include <media/dvb_frontend.h>
+#include "s921.h"
+
+static int debug = 1;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");
+
+#define rc(args...) do { \
+ printk(KERN_ERR "s921: " args); \
+} while (0)
+
+#define dprintk(args...) \
+ do { \
+ if (debug) { \
+ printk(KERN_DEBUG "s921: %s: ", __func__); \
+ printk(args); \
+ } \
+ } while (0)
+
+struct s921_state {
+ struct i2c_adapter *i2c;
+ const struct s921_config *config;
+
+ struct dvb_frontend frontend;
+
+ /* The Demod can't easily provide these, we cache them */
+ u32 currentfreq;
+};
+
+/*
+ * Various tuner defaults need to be established for a given frequency kHz.
+ * fixme: The bounds on the bands do not match the doc in real life.
+ * fixme: Some of them have been moved, other might need adjustment.
+ */
+static struct s921_bandselect_val {
+ u32 freq_low;
+ u8 band_reg;
+} s921_bandselect[] = {
+ { 0, 0x7b },
+ { 485140000, 0x5b },
+ { 515140000, 0x3b },
+ { 545140000, 0x1b },
+ { 599140000, 0xfb },
+ { 623140000, 0xdb },
+ { 659140000, 0xbb },
+ { 713140000, 0x9b },
+};
+
+struct regdata {
+ u8 reg;
+ u8 data;
+};
+
+static struct regdata s921_init[] = {
+ { 0x01, 0x80 }, /* Probably, a reset sequence */
+ { 0x01, 0x40 },
+ { 0x01, 0x80 },
+ { 0x01, 0x40 },
+
+ { 0x02, 0x00 },
+ { 0x03, 0x40 },
+ { 0x04, 0x01 },
+ { 0x05, 0x00 },
+ { 0x06, 0x00 },
+ { 0x07, 0x00 },
+ { 0x08, 0x00 },
+ { 0x09, 0x00 },
+ { 0x0a, 0x00 },
+ { 0x0b, 0x5a },
+ { 0x0c, 0x00 },
+ { 0x0d, 0x00 },
+ { 0x0f, 0x00 },
+ { 0x13, 0x1b },
+ { 0x14, 0x80 },
+ { 0x15, 0x40 },
+ { 0x17, 0x70 },
+ { 0x18, 0x01 },
+ { 0x19, 0x12 },
+ { 0x1a, 0x01 },
+ { 0x1b, 0x12 },
+ { 0x1c, 0xa0 },
+ { 0x1d, 0x00 },
+ { 0x1e, 0x0a },
+ { 0x1f, 0x08 },
+ { 0x20, 0x40 },
+ { 0x21, 0xff },
+ { 0x22, 0x4c },
+ { 0x23, 0x4e },
+ { 0x24, 0x4c },
+ { 0x25, 0x00 },
+ { 0x26, 0x00 },
+ { 0x27, 0xf4 },
+ { 0x28, 0x60 },
+ { 0x29, 0x88 },
+ { 0x2a, 0x40 },
+ { 0x2b, 0x40 },
+ { 0x2c, 0xff },
+ { 0x2d, 0x00 },
+ { 0x2e, 0xff },
+ { 0x2f, 0x00 },
+ { 0x30, 0x20 },
+ { 0x31, 0x06 },
+ { 0x32, 0x0c },
+ { 0x34, 0x0f },
+ { 0x37, 0xfe },
+ { 0x38, 0x00 },
+ { 0x39, 0x63 },
+ { 0x3a, 0x10 },
+ { 0x3b, 0x10 },
+ { 0x47, 0x00 },
+ { 0x49, 0xe5 },
+ { 0x4b, 0x00 },
+ { 0x50, 0xc0 },
+ { 0x52, 0x20 },
+ { 0x54, 0x5a },
+ { 0x55, 0x5b },
+ { 0x56, 0x40 },
+ { 0x57, 0x70 },
+ { 0x5c, 0x50 },
+ { 0x5d, 0x00 },
+ { 0x62, 0x17 },
+ { 0x63, 0x2f },
+ { 0x64, 0x6f },
+ { 0x68, 0x00 },
+ { 0x69, 0x89 },
+ { 0x6a, 0x00 },
+ { 0x6b, 0x00 },
+ { 0x6c, 0x00 },
+ { 0x6d, 0x00 },
+ { 0x6e, 0x00 },
+ { 0x70, 0x10 },
+ { 0x71, 0x00 },
+ { 0x75, 0x00 },
+ { 0x76, 0x30 },
+ { 0x77, 0x01 },
+ { 0xaf, 0x00 },
+ { 0xb0, 0xa0 },
+ { 0xb2, 0x3d },
+ { 0xb3, 0x25 },
+ { 0xb4, 0x8b },
+ { 0xb5, 0x4b },
+ { 0xb6, 0x3f },
+ { 0xb7, 0xff },
+ { 0xb8, 0xff },
+ { 0xb9, 0xfc },
+ { 0xba, 0x00 },
+ { 0xbb, 0x00 },
+ { 0xbc, 0x00 },
+ { 0xd0, 0x30 },
+ { 0xe4, 0x84 },
+ { 0xf0, 0x48 },
+ { 0xf1, 0x19 },
+ { 0xf2, 0x5a },
+ { 0xf3, 0x8e },
+ { 0xf4, 0x2d },
+ { 0xf5, 0x07 },
+ { 0xf6, 0x5a },
+ { 0xf7, 0xba },
+ { 0xf8, 0xd7 },
+};
+
+static struct regdata s921_prefreq[] = {
+ { 0x47, 0x60 },
+ { 0x68, 0x00 },
+ { 0x69, 0x89 },
+ { 0xf0, 0x48 },
+ { 0xf1, 0x19 },
+};
+
+static struct regdata s921_postfreq[] = {
+ { 0xf5, 0xae },
+ { 0xf6, 0xb7 },
+ { 0xf7, 0xba },
+ { 0xf8, 0xd7 },
+ { 0x68, 0x0a },
+ { 0x69, 0x09 },
+};
+
+static int s921_i2c_writereg(struct s921_state *state,
+ u8 i2c_addr, int reg, int data)
+{
+ u8 buf[] = { reg, data };
+ struct i2c_msg msg = {
+ .addr = i2c_addr, .flags = 0, .buf = buf, .len = 2
+ };
+ int rc;
+
+ rc = i2c_transfer(state->i2c, &msg, 1);
+ if (rc != 1) {
+ printk("%s: writereg rcor(rc == %i, reg == 0x%02x, data == 0x%02x)\n",
+ __func__, rc, reg, data);
+ return rc;
+ }
+
+ return 0;
+}
+
+static int s921_i2c_writeregdata(struct s921_state *state, u8 i2c_addr,
+ struct regdata *rd, int size)
+{
+ int i, rc;
+
+ for (i = 0; i < size; i++) {
+ rc = s921_i2c_writereg(state, i2c_addr, rd[i].reg, rd[i].data);
+ if (rc < 0)
+ return rc;
+ }
+ return 0;
+}
+
+static int s921_i2c_readreg(struct s921_state *state, u8 i2c_addr, u8 reg)
+{
+ u8 val;
+ int rc;
+ struct i2c_msg msg[] = {
+ { .addr = i2c_addr, .flags = 0, .buf = &reg, .len = 1 },
+ { .addr = i2c_addr, .flags = I2C_M_RD, .buf = &val, .len = 1 }
+ };
+
+ rc = i2c_transfer(state->i2c, msg, 2);
+
+ if (rc != 2) {
+ rc("%s: reg=0x%x (rcor=%d)\n", __func__, reg, rc);
+ return rc;
+ }
+
+ return val;
+}
+
+#define s921_readreg(state, reg) \
+ s921_i2c_readreg(state, state->config->demod_address, reg)
+#define s921_writereg(state, reg, val) \
+ s921_i2c_writereg(state, state->config->demod_address, reg, val)
+#define s921_writeregdata(state, regdata) \
+ s921_i2c_writeregdata(state, state->config->demod_address, \
+ regdata, ARRAY_SIZE(regdata))
+
+static int s921_pll_tune(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ struct s921_state *state = fe->demodulator_priv;
+ int band, rc, i;
+ unsigned long f_offset;
+ u8 f_switch;
+ u64 offset;
+
+ dprintk("frequency=%i\n", p->frequency);
+
+ for (band = 0; band < ARRAY_SIZE(s921_bandselect); band++)
+ if (p->frequency < s921_bandselect[band].freq_low)
+ break;
+ band--;
+
+ if (band < 0) {
+ rc("%s: frequency out of range\n", __func__);
+ return -EINVAL;
+ }
+
+ f_switch = s921_bandselect[band].band_reg;
+
+ offset = ((u64)p->frequency) * 258;
+ do_div(offset, 6000000);
+ f_offset = ((unsigned long)offset) + 2321;
+
+ rc = s921_writeregdata(state, s921_prefreq);
+ if (rc < 0)
+ return rc;
+
+ rc = s921_writereg(state, 0xf2, (f_offset >> 8) & 0xff);
+ if (rc < 0)
+ return rc;
+
+ rc = s921_writereg(state, 0xf3, f_offset & 0xff);
+ if (rc < 0)
+ return rc;
+
+ rc = s921_writereg(state, 0xf4, f_switch);
+ if (rc < 0)
+ return rc;
+
+ rc = s921_writeregdata(state, s921_postfreq);
+ if (rc < 0)
+ return rc;
+
+ for (i = 0 ; i < 6; i++) {
+ rc = s921_readreg(state, 0x80);
+ dprintk("status 0x80: %02x\n", rc);
+ }
+ rc = s921_writereg(state, 0x01, 0x40);
+ if (rc < 0)
+ return rc;
+
+ rc = s921_readreg(state, 0x01);
+ dprintk("status 0x01: %02x\n", rc);
+
+ rc = s921_readreg(state, 0x80);
+ dprintk("status 0x80: %02x\n", rc);
+
+ rc = s921_readreg(state, 0x80);
+ dprintk("status 0x80: %02x\n", rc);
+
+ rc = s921_readreg(state, 0x32);
+ dprintk("status 0x32: %02x\n", rc);
+
+ dprintk("pll tune band=%d, pll=%d\n", f_switch, (int)f_offset);
+
+ return 0;
+}
+
+static int s921_initfe(struct dvb_frontend *fe)
+{
+ struct s921_state *state = fe->demodulator_priv;
+ int rc;
+
+ dprintk("\n");
+
+ rc = s921_writeregdata(state, s921_init);
+ if (rc < 0)
+ return rc;
+
+ return 0;
+}
+
+static int s921_read_status(struct dvb_frontend *fe, enum fe_status *status)
+{
+ struct s921_state *state = fe->demodulator_priv;
+ int regstatus, rc;
+
+ *status = 0;
+
+ rc = s921_readreg(state, 0x81);
+ if (rc < 0)
+ return rc;
+
+ regstatus = rc << 8;
+
+ rc = s921_readreg(state, 0x82);
+ if (rc < 0)
+ return rc;
+
+ regstatus |= rc;
+
+ dprintk("status = %04x\n", regstatus);
+
+ /* Full Sync - We don't know what each bit means on regs 0x81/0x82 */
+ if ((regstatus & 0xff) == 0x40) {
+ *status = FE_HAS_SIGNAL |
+ FE_HAS_CARRIER |
+ FE_HAS_VITERBI |
+ FE_HAS_SYNC |
+ FE_HAS_LOCK;
+ } else if (regstatus & 0x40) {
+ /* This is close to Full Sync, but not enough to get useful info */
+ *status = FE_HAS_SIGNAL |
+ FE_HAS_CARRIER |
+ FE_HAS_VITERBI |
+ FE_HAS_SYNC;
+ }
+
+ return 0;
+}
+
+static int s921_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
+{
+ enum fe_status status;
+ struct s921_state *state = fe->demodulator_priv;
+ int rc;
+
+ /* FIXME: Use the proper register for it... 0x80? */
+ rc = s921_read_status(fe, &status);
+ if (rc < 0)
+ return rc;
+
+ *strength = (status & FE_HAS_LOCK) ? 0xffff : 0;
+
+ dprintk("strength = 0x%04x\n", *strength);
+
+ rc = s921_readreg(state, 0x01);
+ dprintk("status 0x01: %02x\n", rc);
+
+ rc = s921_readreg(state, 0x80);
+ dprintk("status 0x80: %02x\n", rc);
+
+ rc = s921_readreg(state, 0x32);
+ dprintk("status 0x32: %02x\n", rc);
+
+ return 0;
+}
+
+static int s921_set_frontend(struct dvb_frontend *fe)
+{
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ struct s921_state *state = fe->demodulator_priv;
+ int rc;
+
+ dprintk("\n");
+
+ /* FIXME: We don't know how to use non-auto mode */
+
+ rc = s921_pll_tune(fe);
+ if (rc < 0)
+ return rc;
+
+ state->currentfreq = p->frequency;
+
+ return 0;
+}
+
+static int s921_get_frontend(struct dvb_frontend *fe,
+ struct dtv_frontend_properties *p)
+{
+ struct s921_state *state = fe->demodulator_priv;
+
+ /* FIXME: Probably it is possible to get it from regs f1 and f2 */
+ p->frequency = state->currentfreq;
+ p->delivery_system = SYS_ISDBT;
+
+ return 0;
+}
+
+static int s921_tune(struct dvb_frontend *fe,
+ bool re_tune,
+ unsigned int mode_flags,
+ unsigned int *delay,
+ enum fe_status *status)
+{
+ int rc = 0;
+
+ dprintk("\n");
+
+ if (re_tune)
+ rc = s921_set_frontend(fe);
+
+ if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
+ s921_read_status(fe, status);
+
+ return rc;
+}
+
+static enum dvbfe_algo s921_get_algo(struct dvb_frontend *fe)
+{
+ return DVBFE_ALGO_HW;
+}
+
+static void s921_release(struct dvb_frontend *fe)
+{
+ struct s921_state *state = fe->demodulator_priv;
+
+ dprintk("\n");
+ kfree(state);
+}
+
+static const struct dvb_frontend_ops s921_ops;
+
+struct dvb_frontend *s921_attach(const struct s921_config *config,
+ struct i2c_adapter *i2c)
+{
+ /* allocate memory for the internal state */
+ struct s921_state *state =
+ kzalloc(sizeof(struct s921_state), GFP_KERNEL);
+
+ dprintk("\n");
+ if (!state) {
+ rc("Unable to kzalloc\n");
+ return NULL;
+ }
+
+ /* setup the state */
+ state->config = config;
+ state->i2c = i2c;
+
+ /* create dvb_frontend */
+ memcpy(&state->frontend.ops, &s921_ops,
+ sizeof(struct dvb_frontend_ops));
+ state->frontend.demodulator_priv = state;
+
+ return &state->frontend;
+}
+EXPORT_SYMBOL_GPL(s921_attach);
+
+static const struct dvb_frontend_ops s921_ops = {
+ .delsys = { SYS_ISDBT },
+ /* Use dib8000 values per default */
+ .info = {
+ .name = "Sharp S921",
+ .frequency_min_hz = 470 * MHz,
+ /*
+ * Max should be 770MHz instead, according with Sharp docs,
+ * but Leadership doc says it works up to 806 MHz. This is
+ * required to get channel 69, used in Brazil
+ */
+ .frequency_max_hz = 806 * MHz,
+ .caps = FE_CAN_INVERSION_AUTO |
+ FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
+ FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
+ FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
+ FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
+ FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_RECOVER |
+ FE_CAN_HIERARCHY_AUTO,
+ },
+
+ .release = s921_release,
+
+ .init = s921_initfe,
+ .set_frontend = s921_set_frontend,
+ .get_frontend = s921_get_frontend,
+ .read_status = s921_read_status,
+ .read_signal_strength = s921_read_signal_strength,
+ .tune = s921_tune,
+ .get_frontend_algo = s921_get_algo,
+};
+
+MODULE_DESCRIPTION("DVB Frontend module for Sharp S921 hardware");
+MODULE_AUTHOR("Mauro Carvalho Chehab");
+MODULE_AUTHOR("Douglas Landgraf <dougsland@redhat.com>");
+MODULE_LICENSE("GPL");