1 files changed, 548 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/s921.c b/drivers/media/dvb/frontends/s921.c
new file mode 100644
index 00000000000..ca0103d5f14
--- /dev/null
+++ b/drivers/media/dvb/frontends/s921.c
@@ -0,0 +1,548 @@
+/*
+ *   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 <mchehab@redhat.com>
+ *   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
+ *
+ *   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 version 2.
+ *
+ *   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 <linux/kernel.h>
+#include <asm/div64.h>
+
+#include "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 dvb_frontend_parameters *p)
+{
+        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, fe_status_t *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)
+{
+        fe_status_t     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 dvb_frontend_parameters *p)
+{
+        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, p);
+        if (rc < 0)
+                return rc;
+
+        state->currentfreq = p->frequency;
+
+        return 0;
+}
+
+static int s921_get_frontend(struct dvb_frontend *fe,
+        struct dvb_frontend_parameters *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;
+
+        return 0;
+}
+
+static int s921_tune(struct dvb_frontend *fe,
+                        struct dvb_frontend_parameters *params,
+                        unsigned int mode_flags,
+                        unsigned int *delay,
+                        fe_status_t *status)
+{
+        int rc = 0;
+
+        dprintk("\n");
+
+        if (params != NULL)
+                rc = s921_set_frontend(fe, params);
+
+        if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
+                s921_read_status(fe, status);
+
+        return rc;
+}
+
+static int s921_get_algo(struct dvb_frontend *fe)
+{
+        return 1; /* FE_ALGO_HW */
+}
+
+static void s921_release(struct dvb_frontend *fe)
+{
+        struct s921_state *state = fe->demodulator_priv;
+
+        dprintk("\n");
+        kfree(state);
+}
+
+static 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 == NULL) {
+                rc("Unable to kzalloc\n");
+                goto rcor;
+        }
+
+        /* 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;
+
+rcor:
+        kfree(state);
+
+        return NULL;
+}
+EXPORT_SYMBOL(s921_attach);
+
+static struct dvb_frontend_ops s921_ops = {
+        /* Use dib8000 values per default */
+        .info = {
+                .name = "Sharp S921",
+                .type = FE_OFDM,
+                .frequency_min = 470000000,
+                /*
+                 * 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 = 806000000,
+                .frequency_tolerance = 0,
+                 .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 <mchehab@redhat.com>");
+MODULE_AUTHOR("Douglas Landgraf <dougsland@redhat.com>");
+MODULE_LICENSE("GPL");