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Diffstat (limited to 'drivers/media/dvb/frontends/s921_module.c')
-rw-r--r--drivers/media/dvb/frontends/s921_module.c190
1 files changed, 190 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/s921_module.c b/drivers/media/dvb/frontends/s921_module.c
new file mode 100644
index 00000000000..3cbb9cb2cf4
--- /dev/null
+++ b/drivers/media/dvb/frontends/s921_module.c
@@ -0,0 +1,190 @@
+/*
+ * Driver for Sharp s921 driver
+ *
+ * Copyright (C) 2008 Markus Rechberger <mrechberger@sundtek.de>
+ *
+ * All rights reserved.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include "dvb_frontend.h"
+#include "s921_module.h"
+#include "s921_core.h"
+
+static unsigned int debug = 0;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug,"s921 debugging (default off)");
+
+#define dprintk(fmt, args...) if (debug) do {\
+ printk("s921 debug: " fmt, ##args); } while (0)
+
+struct s921_state
+{
+ struct dvb_frontend frontend;
+ fe_modulation_t current_modulation;
+ __u32 snr;
+ __u32 current_frequency;
+ __u8 addr;
+ struct s921_isdb_t dev;
+ struct i2c_adapter *i2c;
+};
+
+static int s921_set_parameters(struct dvb_frontend *fe, struct dvb_frontend_parameters *param) {
+ struct s921_state *state = (struct s921_state *)fe->demodulator_priv;
+ struct s921_isdb_t_transmission_mode_params params;
+ struct s921_isdb_t_tune_params tune_params;
+
+ tune_params.frequency = param->frequency;
+ s921_isdb_cmd(&state->dev, ISDB_T_CMD_SET_PARAM, &params);
+ s921_isdb_cmd(&state->dev, ISDB_T_CMD_TUNE, &tune_params);
+ mdelay(100);
+ return 0;
+}
+
+static int s921_init(struct dvb_frontend *fe) {
+ printk("s921 init\n");
+ return 0;
+}
+
+static int s921_sleep(struct dvb_frontend *fe) {
+ printk("s921 sleep\n");
+ return 0;
+}
+
+static int s921_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+ struct s921_state *state = (struct s921_state *)fe->demodulator_priv;
+ unsigned int ret;
+ mdelay(5);
+ s921_isdb_cmd(&state->dev, ISDB_T_CMD_GET_STATUS, &ret);
+ *status = 0;
+
+ printk("status: %02x\n", ret);
+ if (ret == 1) {
+ *status |= FE_HAS_CARRIER;
+ *status |= FE_HAS_VITERBI;
+ *status |= FE_HAS_LOCK;
+ *status |= FE_HAS_SYNC;
+ *status |= FE_HAS_SIGNAL;
+ }
+
+ return 0;
+}
+
+static int s921_read_ber(struct dvb_frontend *fe, __u32 *ber)
+{
+ dprintk("read ber\n");
+ return 0;
+}
+
+static int s921_read_snr(struct dvb_frontend *fe, __u16 *snr)
+{
+ dprintk("read snr\n");
+ return 0;
+}
+
+static int s921_read_ucblocks(struct dvb_frontend *fe, __u32 *ucblocks)
+{
+ dprintk("read ucblocks\n");
+ return 0;
+}
+
+static void s921_release(struct dvb_frontend *fe)
+{
+ struct s921_state *state = (struct s921_state *)fe->demodulator_priv;
+ kfree(state);
+}
+
+static struct dvb_frontend_ops demod_s921={
+ .info = {
+ .name = "SHARP S921",
+ .type = FE_OFDM,
+ .frequency_min = 473143000,
+ .frequency_max = 767143000,
+ .frequency_stepsize = 6000000,
+ .frequency_tolerance = 0,
+ .caps = 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_HIERARCHY_AUTO | FE_CAN_RECOVER |
+ FE_CAN_MUTE_TS
+ },
+ .init = s921_init,
+ .sleep = s921_sleep,
+ .set_frontend = s921_set_parameters,
+ .read_snr = s921_read_snr,
+ .read_ber = s921_read_ber,
+ .read_status = s921_read_status,
+ .read_ucblocks = s921_read_ucblocks,
+ .release = s921_release,
+};
+
+static int s921_write(void *dev, u8 reg, u8 val) {
+ struct s921_state *state = dev;
+ char buf[2]={reg,val};
+ int err;
+ struct i2c_msg i2cmsgs = {
+ .addr = state->addr,
+ .flags = 0,
+ .len = 2,
+ .buf = buf
+ };
+
+ if((err = i2c_transfer(state->i2c, &i2cmsgs, 1))<0) {
+ printk("%s i2c_transfer error %d\n", __FUNCTION__, err);
+ if (err < 0)
+ return err;
+ else
+ return -EREMOTEIO;
+ }
+
+ return 0;
+}
+
+static int s921_read(void *dev, u8 reg) {
+ struct s921_state *state = dev;
+ u8 b1;
+ int ret;
+ struct i2c_msg msg[2] = { { .addr = state->addr,
+ .flags = 0,
+ .buf = &reg, .len = 1 },
+ { .addr = state->addr,
+ .flags = I2C_M_RD,
+ .buf = &b1, .len = 1 } };
+
+ ret = i2c_transfer(state->i2c, msg, 2);
+ if (ret != 2)
+ return ret;
+ return b1;
+}
+
+struct dvb_frontend* s921_attach(const struct s921_config *config,
+ struct i2c_adapter *i2c)
+{
+
+ struct s921_state *state;
+ state = kzalloc(sizeof(struct s921_state), GFP_KERNEL);
+ memset(state, 0x0, sizeof(struct s921_state));
+
+ state->addr = config->i2c_address;
+ state->i2c = i2c;
+ state->dev.i2c_write = &s921_write;
+ state->dev.i2c_read = &s921_read;
+ state->dev.priv_dev = state;
+
+ s921_isdb_cmd(&state->dev, ISDB_T_CMD_INIT, NULL);
+
+ memcpy(&state->frontend.ops, &demod_s921, sizeof(struct dvb_frontend_ops));
+ state->frontend.demodulator_priv = state;
+ return &state->frontend;
+}
+
+EXPORT_SYMBOL_GPL(s921_attach);
+MODULE_AUTHOR("Markus Rechberger <mrechberger@empiatech.com>");
+MODULE_DESCRIPTION("Sharp S921 ISDB-T 1Seg");
+MODULE_LICENSE("GPL");