1 files changed, 856 insertions, 0 deletions

diff --git a/drivers/media/dvb-frontends/bcm3510.c b/drivers/media/dvb-frontends/bcm3510.c
new file mode 100644
index 000000000000..033cd7ad3ca2
--- /dev/null
+++ b/drivers/media/dvb-frontends/bcm3510.c
@@ -0,0 +1,856 @@
+/*
+ * Support for the Broadcom BCM3510 ATSC demodulator (1st generation Air2PC)
+ *
+ *  Copyright (C) 2001-5, B2C2 inc.
+ *
+ *  GPL/Linux driver written by Patrick Boettcher <patrick.boettcher@desy.de>
+ *
+ *  This driver is "hard-coded" to be used with the 1st generation of
+ *  Technisat/B2C2's Air2PC ATSC PCI/USB cards/boxes. The pll-programming
+ *  (Panasonic CT10S) is located here, which is actually wrong. Unless there is
+ *  another device with a BCM3510, this is no problem.
+ *
+ *  The driver works also with QAM64 DVB-C, but had an unreasonable high
+ *  UNC. (Tested with the Air2PC ATSC 1st generation)
+ *
+ *  You'll need a firmware for this driver in order to get it running. It is
+ *  called "dvb-fe-bcm3510-01.fw".
+ *
+ * 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/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/firmware.h>
+#include <linux/jiffies.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+
+#include "dvb_frontend.h"
+#include "bcm3510.h"
+#include "bcm3510_priv.h"
+
+struct bcm3510_state {
+
+        struct i2c_adapter* i2c;
+        const struct bcm3510_config* config;
+        struct dvb_frontend frontend;
+
+        /* demodulator private data */
+        struct mutex hab_mutex;
+        u8 firmware_loaded:1;
+
+        unsigned long next_status_check;
+        unsigned long status_check_interval;
+        struct bcm3510_hab_cmd_status1 status1;
+        struct bcm3510_hab_cmd_status2 status2;
+};
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "set debugging level (1=info,2=i2c (|-able)).");
+
+#define dprintk(level,x...) if (level & debug) printk(x)
+#define dbufout(b,l,m) {\
+            int i; \
+            for (i = 0; i < l; i++) \
+                m("%02x ",b[i]); \
+}
+#define deb_info(args...) dprintk(0x01,args)
+#define deb_i2c(args...)  dprintk(0x02,args)
+#define deb_hab(args...)  dprintk(0x04,args)
+
+/* transfer functions */
+static int bcm3510_writebytes (struct bcm3510_state *state, u8 reg, u8 *buf, u8 len)
+{
+        u8 b[256];
+        int err;
+        struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = b, .len = len + 1 };
+
+        b[0] = reg;
+        memcpy(&b[1],buf,len);
+
+        deb_i2c("i2c wr %02x: ",reg);
+        dbufout(buf,len,deb_i2c);
+        deb_i2c("\n");
+
+        if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
+
+                deb_info("%s: i2c write error (addr %02x, reg %02x, err == %i)\n",
+                        __func__, state->config->demod_address, reg,  err);
+                return -EREMOTEIO;
+        }
+
+        return 0;
+}
+
+static int bcm3510_readbytes (struct bcm3510_state *state, u8 reg, u8 *buf, u8 len)
+{
+        struct i2c_msg msg[] = {
+                { .addr = state->config->demod_address, .flags = 0,        .buf = &reg, .len = 1 },
+                { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = buf,  .len = len }
+        };
+        int err;
+
+        memset(buf,0,len);
+
+        if ((err = i2c_transfer (state->i2c, msg, 2)) != 2) {
+                deb_info("%s: i2c read error (addr %02x, reg %02x, err == %i)\n",
+                        __func__, state->config->demod_address, reg,  err);
+                return -EREMOTEIO;
+        }
+        deb_i2c("i2c rd %02x: ",reg);
+        dbufout(buf,len,deb_i2c);
+        deb_i2c("\n");
+
+        return 0;
+}
+
+static int bcm3510_writeB(struct bcm3510_state *state, u8 reg, bcm3510_register_value v)
+{
+        return bcm3510_writebytes(state,reg,&v.raw,1);
+}
+
+static int bcm3510_readB(struct bcm3510_state *state, u8 reg, bcm3510_register_value *v)
+{
+        return bcm3510_readbytes(state,reg,&v->raw,1);
+}
+
+/* Host Access Buffer transfers */
+static int bcm3510_hab_get_response(struct bcm3510_state *st, u8 *buf, int len)
+{
+        bcm3510_register_value v;
+        int ret,i;
+
+        v.HABADR_a6.HABADR = 0;
+        if ((ret = bcm3510_writeB(st,0xa6,v)) < 0)
+                return ret;
+
+        for (i = 0; i < len; i++) {
+                if ((ret = bcm3510_readB(st,0xa7,&v)) < 0)
+                        return ret;
+                buf[i] = v.HABDATA_a7;
+        }
+        return 0;
+}
+
+static int bcm3510_hab_send_request(struct bcm3510_state *st, u8 *buf, int len)
+{
+        bcm3510_register_value v,hab;
+        int ret,i;
+        unsigned long t;
+
+/* Check if any previous HAB request still needs to be serviced by the
+ * Acquisition Processor before sending new request */
+        if ((ret = bcm3510_readB(st,0xa8,&v)) < 0)
+                return ret;
+        if (v.HABSTAT_a8.HABR) {
+                deb_info("HAB is running already - clearing it.\n");
+                v.HABSTAT_a8.HABR = 0;
+                bcm3510_writeB(st,0xa8,v);
+//              return -EBUSY;
+        }
+
+/* Send the start HAB Address (automatically incremented after write of
+ * HABDATA) and write the HAB Data */
+        hab.HABADR_a6.HABADR = 0;
+        if ((ret = bcm3510_writeB(st,0xa6,hab)) < 0)
+                return ret;
+
+        for (i = 0; i < len; i++) {
+                hab.HABDATA_a7 = buf[i];
+                if ((ret = bcm3510_writeB(st,0xa7,hab)) < 0)
+                        return ret;
+        }
+
+/* Set the HABR bit to indicate AP request in progress (LBHABR allows HABR to
+ * be written) */
+        v.raw = 0; v.HABSTAT_a8.HABR = 1; v.HABSTAT_a8.LDHABR = 1;
+        if ((ret = bcm3510_writeB(st,0xa8,v)) < 0)
+                return ret;
+
+/* Polling method: Wait until the AP finishes processing the HAB request */
+        t = jiffies + 1*HZ;
+        while (time_before(jiffies, t)) {
+                deb_info("waiting for HAB to complete\n");
+                msleep(10);
+                if ((ret = bcm3510_readB(st,0xa8,&v)) < 0)
+                        return ret;
+
+                if (!v.HABSTAT_a8.HABR)
+                        return 0;
+        }
+
+        deb_info("send_request execution timed out.\n");
+        return -ETIMEDOUT;
+}
+
+static int bcm3510_do_hab_cmd(struct bcm3510_state *st, u8 cmd, u8 msgid, u8 *obuf, u8 olen, u8 *ibuf, u8 ilen)
+{
+        u8 ob[olen+2],ib[ilen+2];
+        int ret = 0;
+
+        ob[0] = cmd;
+        ob[1] = msgid;
+        memcpy(&ob[2],obuf,olen);
+
+        deb_hab("hab snd: ");
+        dbufout(ob,olen+2,deb_hab);
+        deb_hab("\n");
+
+        if (mutex_lock_interruptible(&st->hab_mutex) < 0)
+                return -EAGAIN;
+
+        if ((ret = bcm3510_hab_send_request(st, ob, olen+2)) < 0 ||
+                (ret = bcm3510_hab_get_response(st, ib, ilen+2)) < 0)
+                goto error;
+
+        deb_hab("hab get: ");
+        dbufout(ib,ilen+2,deb_hab);
+        deb_hab("\n");
+
+        memcpy(ibuf,&ib[2],ilen);
+error:
+        mutex_unlock(&st->hab_mutex);
+        return ret;
+}
+
+#if 0
+/* not needed, we use a semaphore to prevent HAB races */
+static int bcm3510_is_ap_ready(struct bcm3510_state *st)
+{
+        bcm3510_register_value ap,hab;
+        int ret;
+
+        if ((ret = bcm3510_readB(st,0xa8,&hab)) < 0 ||
+                (ret = bcm3510_readB(st,0xa2,&ap) < 0))
+                return ret;
+
+        if (ap.APSTAT1_a2.RESET || ap.APSTAT1_a2.IDLE || ap.APSTAT1_a2.STOP || hab.HABSTAT_a8.HABR) {
+                deb_info("AP is busy\n");
+                return -EBUSY;
+        }
+
+        return 0;
+}
+#endif
+
+static int bcm3510_bert_reset(struct bcm3510_state *st)
+{
+        bcm3510_register_value b;
+        int ret;
+
+        if ((ret = bcm3510_readB(st,0xfa,&b)) < 0)
+                return ret;
+
+        b.BERCTL_fa.RESYNC = 0; bcm3510_writeB(st,0xfa,b);
+        b.BERCTL_fa.RESYNC = 1; bcm3510_writeB(st,0xfa,b);
+        b.BERCTL_fa.RESYNC = 0; bcm3510_writeB(st,0xfa,b);
+        b.BERCTL_fa.CNTCTL = 1; b.BERCTL_fa.BITCNT = 1; bcm3510_writeB(st,0xfa,b);
+
+        /* clear residual bit counter TODO  */
+        return 0;
+}
+
+static int bcm3510_refresh_state(struct bcm3510_state *st)
+{
+        if (time_after(jiffies,st->next_status_check)) {
+                bcm3510_do_hab_cmd(st, CMD_STATUS, MSGID_STATUS1, NULL,0, (u8 *)&st->status1, sizeof(st->status1));
+                bcm3510_do_hab_cmd(st, CMD_STATUS, MSGID_STATUS2, NULL,0, (u8 *)&st->status2, sizeof(st->status2));
+                st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;
+        }
+        return 0;
+}
+
+static int bcm3510_read_status(struct dvb_frontend *fe, fe_status_t *status)
+{
+        struct bcm3510_state* st = fe->demodulator_priv;
+        bcm3510_refresh_state(st);
+
+        *status = 0;
+        if (st->status1.STATUS1.RECEIVER_LOCK)
+                *status |= FE_HAS_LOCK | FE_HAS_SYNC;
+
+        if (st->status1.STATUS1.FEC_LOCK)
+                *status |= FE_HAS_VITERBI;
+
+        if (st->status1.STATUS1.OUT_PLL_LOCK)
+                *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
+
+        if (*status & FE_HAS_LOCK)
+                st->status_check_interval = 1500;
+        else /* more frequently checks if no lock has been achieved yet */
+                st->status_check_interval = 500;
+
+        deb_info("real_status: %02x\n",*status);
+        return 0;
+}
+
+static int bcm3510_read_ber(struct dvb_frontend* fe, u32* ber)
+{
+        struct bcm3510_state* st = fe->demodulator_priv;
+        bcm3510_refresh_state(st);
+
+        *ber = (st->status2.LDBER0 << 16) | (st->status2.LDBER1 << 8) | st->status2.LDBER2;
+        return 0;
+}
+
+static int bcm3510_read_unc(struct dvb_frontend* fe, u32* unc)
+{
+        struct bcm3510_state* st = fe->demodulator_priv;
+        bcm3510_refresh_state(st);
+        *unc = (st->status2.LDUERC0 << 8) | st->status2.LDUERC1;
+        return 0;
+}
+
+static int bcm3510_read_signal_strength(struct dvb_frontend* fe, u16* strength)
+{
+        struct bcm3510_state* st = fe->demodulator_priv;
+        s32 t;
+
+        bcm3510_refresh_state(st);
+        t = st->status2.SIGNAL;
+
+        if (t > 190)
+                t = 190;
+        if (t < 90)
+                t = 90;
+
+        t -= 90;
+        t = t * 0xff / 100;
+        /* normalize if necessary */
+        *strength = (t << 8) | t;
+        return 0;
+}
+
+static int bcm3510_read_snr(struct dvb_frontend* fe, u16* snr)
+{
+        struct bcm3510_state* st = fe->demodulator_priv;
+        bcm3510_refresh_state(st);
+
+        *snr = st->status1.SNR_EST0*1000 + ((st->status1.SNR_EST1*1000) >> 8);
+        return 0;
+}
+
+/* tuner frontend programming */
+static int bcm3510_tuner_cmd(struct bcm3510_state* st,u8 bc, u16 n, u8 a)
+{
+        struct bcm3510_hab_cmd_tune c;
+        memset(&c,0,sizeof(struct bcm3510_hab_cmd_tune));
+
+/* I2C Mode disabled,  set 16 control / Data pairs */
+        c.length = 0x10;
+        c.clock_width = 0;
+/* CS1, CS0, DATA, CLK bits control the tuner RF_AGC_SEL pin is set to
+ * logic high (as Configuration) */
+        c.misc = 0x10;
+/* Set duration of the initial state of TUNCTL = 3.34 micro Sec */
+        c.TUNCTL_state = 0x40;
+
+/* PRESCALER DIVIDE RATIO | BC1_2_3_4; (band switch), 1stosc REFERENCE COUNTER REF_S12 and REF_S11 */
+        c.ctl_dat[0].ctrl.size = BITS_8;
+        c.ctl_dat[0].data      = 0x80 | bc;
+
+/* Control DATA pin, 1stosc REFERENCE COUNTER REF_S10 to REF_S3 */
+        c.ctl_dat[1].ctrl.size = BITS_8;
+        c.ctl_dat[1].data      = 4;
+
+/* set CONTROL BIT 1 to 1, 1stosc REFERENCE COUNTER REF_S2 to REF_S1 */
+        c.ctl_dat[2].ctrl.size = BITS_3;
+        c.ctl_dat[2].data      = 0x20;
+
+/* control CS0 pin, pulse byte ? */
+        c.ctl_dat[3].ctrl.size = BITS_3;
+        c.ctl_dat[3].ctrl.clk_off = 1;
+        c.ctl_dat[3].ctrl.cs0  = 1;
+        c.ctl_dat[3].data      = 0x40;
+
+/* PGM_S18 to PGM_S11 */
+        c.ctl_dat[4].ctrl.size = BITS_8;
+        c.ctl_dat[4].data      = n >> 3;
+
+/* PGM_S10 to PGM_S8, SWL_S7 to SWL_S3 */
+        c.ctl_dat[5].ctrl.size = BITS_8;
+        c.ctl_dat[5].data      = ((n & 0x7) << 5) | (a >> 2);
+
+/* SWL_S2 and SWL_S1, set CONTROL BIT 2 to 0 */
+        c.ctl_dat[6].ctrl.size = BITS_3;
+        c.ctl_dat[6].data      = (a << 6) & 0xdf;
+
+/* control CS0 pin, pulse byte ? */
+        c.ctl_dat[7].ctrl.size = BITS_3;
+        c.ctl_dat[7].ctrl.clk_off = 1;
+        c.ctl_dat[7].ctrl.cs0  = 1;
+        c.ctl_dat[7].data      = 0x40;
+
+/* PRESCALER DIVIDE RATIO, 2ndosc REFERENCE COUNTER REF_S12 and REF_S11 */
+        c.ctl_dat[8].ctrl.size = BITS_8;
+        c.ctl_dat[8].data      = 0x80;
+
+/* 2ndosc REFERENCE COUNTER REF_S10 to REF_S3 */
+        c.ctl_dat[9].ctrl.size = BITS_8;
+        c.ctl_dat[9].data      = 0x10;
+
+/* set CONTROL BIT 1 to 1, 2ndosc REFERENCE COUNTER REF_S2 to REF_S1 */
+        c.ctl_dat[10].ctrl.size = BITS_3;
+        c.ctl_dat[10].data      = 0x20;
+
+/* pulse byte */
+        c.ctl_dat[11].ctrl.size = BITS_3;
+        c.ctl_dat[11].ctrl.clk_off = 1;
+        c.ctl_dat[11].ctrl.cs1  = 1;
+        c.ctl_dat[11].data      = 0x40;
+
+/* PGM_S18 to PGM_S11 */
+        c.ctl_dat[12].ctrl.size = BITS_8;
+        c.ctl_dat[12].data      = 0x2a;
+
+/* PGM_S10 to PGM_S8 and SWL_S7 to SWL_S3 */
+        c.ctl_dat[13].ctrl.size = BITS_8;
+        c.ctl_dat[13].data      = 0x8e;
+
+/* SWL_S2 and SWL_S1 and set CONTROL BIT 2 to 0 */
+        c.ctl_dat[14].ctrl.size = BITS_3;
+        c.ctl_dat[14].data      = 0;
+
+/* Pulse Byte */
+        c.ctl_dat[15].ctrl.size = BITS_3;
+        c.ctl_dat[15].ctrl.clk_off = 1;
+        c.ctl_dat[15].ctrl.cs1  = 1;
+        c.ctl_dat[15].data      = 0x40;
+
+        return bcm3510_do_hab_cmd(st,CMD_TUNE, MSGID_TUNE,(u8 *) &c,sizeof(c), NULL, 0);
+}
+
+static int bcm3510_set_freq(struct bcm3510_state* st,u32 freq)
+{
+        u8 bc,a;
+        u16 n;
+        s32 YIntercept,Tfvco1;
+
+        freq /= 1000;
+
+        deb_info("%dkHz:",freq);
+        /* set Band Switch */
+        if (freq <= 168000)
+                bc = 0x1c;
+        else if (freq <= 378000)
+                bc = 0x2c;
+        else
+                bc = 0x30;
+
+        if (freq >= 470000) {
+                freq -= 470001;
+                YIntercept = 18805;
+        } else if (freq >= 90000) {
+                freq -= 90001;
+                YIntercept = 15005;
+        } else if (freq >= 76000){
+                freq -= 76001;
+                YIntercept = 14865;
+        } else {
+                freq -= 54001;
+                YIntercept = 14645;
+        }
+
+        Tfvco1 = (((freq/6000)*60 + YIntercept)*4)/10;
+
+        n = Tfvco1 >> 6;
+        a = Tfvco1 & 0x3f;
+
+        deb_info(" BC1_2_3_4: %x, N: %x A: %x\n", bc, n, a);
+        if (n >= 16 && n <= 2047)
+                return bcm3510_tuner_cmd(st,bc,n,a);
+
+        return -EINVAL;
+}
+
+static int bcm3510_set_frontend(struct dvb_frontend *fe)
+{
+        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+        struct bcm3510_state* st = fe->demodulator_priv;
+        struct bcm3510_hab_cmd_ext_acquire cmd;
+        struct bcm3510_hab_cmd_bert_control bert;
+        int ret;
+
+        memset(&cmd,0,sizeof(cmd));
+        switch (c->modulation) {
+                case QAM_256:
+                        cmd.ACQUIRE0.MODE = 0x1;
+                        cmd.ACQUIRE1.SYM_RATE = 0x1;
+                        cmd.ACQUIRE1.IF_FREQ = 0x1;
+                        break;
+                case QAM_64:
+                        cmd.ACQUIRE0.MODE = 0x2;
+                        cmd.ACQUIRE1.SYM_RATE = 0x2;
+                        cmd.ACQUIRE1.IF_FREQ = 0x1;
+                        break;
+#if 0
+                case QAM_256:
+                        cmd.ACQUIRE0.MODE = 0x3;
+                        break;
+                case QAM_128:
+                        cmd.ACQUIRE0.MODE = 0x4;
+                        break;
+                case QAM_64:
+                        cmd.ACQUIRE0.MODE = 0x5;
+                        break;
+                case QAM_32:
+                        cmd.ACQUIRE0.MODE = 0x6;
+                        break;
+                case QAM_16:
+                        cmd.ACQUIRE0.MODE = 0x7;
+                        break;
+#endif
+                case VSB_8:
+                        cmd.ACQUIRE0.MODE = 0x8;
+                        cmd.ACQUIRE1.SYM_RATE = 0x0;
+                        cmd.ACQUIRE1.IF_FREQ = 0x0;
+                        break;
+                case VSB_16:
+                        cmd.ACQUIRE0.MODE = 0x9;
+                        cmd.ACQUIRE1.SYM_RATE = 0x0;
+                        cmd.ACQUIRE1.IF_FREQ = 0x0;
+                default:
+                        return -EINVAL;
+        };
+        cmd.ACQUIRE0.OFFSET = 0;
+        cmd.ACQUIRE0.NTSCSWEEP = 1;
+        cmd.ACQUIRE0.FA = 1;
+        cmd.ACQUIRE0.BW = 0;
+
+/*      if (enableOffset) {
+                cmd.IF_OFFSET0 = xx;
+                cmd.IF_OFFSET1 = xx;
+
+                cmd.SYM_OFFSET0 = xx;
+                cmd.SYM_OFFSET1 = xx;
+                if (enableNtscSweep) {
+                        cmd.NTSC_OFFSET0;
+                        cmd.NTSC_OFFSET1;
+                }
+        } */
+        bcm3510_do_hab_cmd(st, CMD_ACQUIRE, MSGID_EXT_TUNER_ACQUIRE, (u8 *) &cmd, sizeof(cmd), NULL, 0);
+
+/* doing it with different MSGIDs, data book and source differs */
+        bert.BE = 0;
+        bert.unused = 0;
+        bcm3510_do_hab_cmd(st, CMD_STATE_CONTROL, MSGID_BERT_CONTROL, (u8 *) &bert, sizeof(bert), NULL, 0);
+        bcm3510_do_hab_cmd(st, CMD_STATE_CONTROL, MSGID_BERT_SET, (u8 *) &bert, sizeof(bert), NULL, 0);
+
+        bcm3510_bert_reset(st);
+
+        ret = bcm3510_set_freq(st, c->frequency);
+        if (ret < 0)
+                return ret;
+
+        memset(&st->status1,0,sizeof(st->status1));
+        memset(&st->status2,0,sizeof(st->status2));
+        st->status_check_interval = 500;
+
+/* Give the AP some time */
+        msleep(200);
+
+        return 0;
+}
+
+static int bcm3510_sleep(struct dvb_frontend* fe)
+{
+        return 0;
+}
+
+static int bcm3510_get_tune_settings(struct dvb_frontend *fe, struct dvb_frontend_tune_settings *s)
+{
+        s->min_delay_ms = 1000;
+        s->step_size = 0;
+        s->max_drift = 0;
+        return 0;
+}
+
+static void bcm3510_release(struct dvb_frontend* fe)
+{
+        struct bcm3510_state* state = fe->demodulator_priv;
+        kfree(state);
+}
+
+/* firmware download:
+ * firmware file is build up like this:
+ * 16bit addr, 16bit length, 8byte of length
+ */
+#define BCM3510_DEFAULT_FIRMWARE "dvb-fe-bcm3510-01.fw"
+
+static int bcm3510_write_ram(struct bcm3510_state *st, u16 addr, const u8 *b,
+                             u16 len)
+{
+        int ret = 0,i;
+        bcm3510_register_value vH, vL,vD;
+
+        vH.MADRH_a9 = addr >> 8;
+        vL.MADRL_aa = addr;
+        if ((ret = bcm3510_writeB(st,0xa9,vH)) < 0) return ret;
+        if ((ret = bcm3510_writeB(st,0xaa,vL)) < 0) return ret;
+
+        for (i = 0; i < len; i++) {
+                vD.MDATA_ab = b[i];
+                if ((ret = bcm3510_writeB(st,0xab,vD)) < 0)
+                        return ret;
+        }
+
+        return 0;
+}
+
+static int bcm3510_download_firmware(struct dvb_frontend* fe)
+{
+        struct bcm3510_state* st = fe->demodulator_priv;
+        const struct firmware *fw;
+        u16 addr,len;
+        const u8 *b;
+        int ret,i;
+
+        deb_info("requesting firmware\n");
+        if ((ret = st->config->request_firmware(fe, &fw, BCM3510_DEFAULT_FIRMWARE)) < 0) {
+                err("could not load firmware (%s): %d",BCM3510_DEFAULT_FIRMWARE,ret);
+                return ret;
+        }
+        deb_info("got firmware: %zd\n",fw->size);
+
+        b = fw->data;
+        for (i = 0; i < fw->size;) {
+                addr = le16_to_cpu( *( (u16 *)&b[i] ) );
+                len  = le16_to_cpu( *( (u16 *)&b[i+2] ) );
+                deb_info("firmware chunk, addr: 0x%04x, len: 0x%04x, total length: 0x%04zx\n",addr,len,fw->size);
+                if ((ret = bcm3510_write_ram(st,addr,&b[i+4],len)) < 0) {
+                        err("firmware download failed: %d\n",ret);
+                        return ret;
+                }
+                i += 4 + len;
+        }
+        release_firmware(fw);
+        deb_info("firmware download successfully completed\n");
+        return 0;
+}
+
+static int bcm3510_check_firmware_version(struct bcm3510_state *st)
+{
+        struct bcm3510_hab_cmd_get_version_info ver;
+        bcm3510_do_hab_cmd(st,CMD_GET_VERSION_INFO,MSGID_GET_VERSION_INFO,NULL,0,(u8*)&ver,sizeof(ver));
+
+        deb_info("Version information: 0x%02x 0x%02x 0x%02x 0x%02x\n",
+                ver.microcode_version, ver.script_version, ver.config_version, ver.demod_version);
+
+        if (ver.script_version == BCM3510_DEF_SCRIPT_VERSION &&
+                ver.config_version == BCM3510_DEF_CONFIG_VERSION &&
+                ver.demod_version  == BCM3510_DEF_DEMOD_VERSION)
+                return 0;
+
+        deb_info("version check failed\n");
+        return -ENODEV;
+}
+
+/* (un)resetting the AP */
+static int bcm3510_reset(struct bcm3510_state *st)
+{
+        int ret;
+        unsigned long  t;
+        bcm3510_register_value v;
+
+        bcm3510_readB(st,0xa0,&v); v.HCTL1_a0.RESET = 1;
+        if ((ret = bcm3510_writeB(st,0xa0,v)) < 0)
+                return ret;
+
+    t = jiffies + 3*HZ;
+        while (time_before(jiffies, t)) {
+                msleep(10);
+                if ((ret = bcm3510_readB(st,0xa2,&v)) < 0)
+                        return ret;
+
+                if (v.APSTAT1_a2.RESET)
+                        return 0;
+        }
+        deb_info("reset timed out\n");
+        return -ETIMEDOUT;
+}
+
+static int bcm3510_clear_reset(struct bcm3510_state *st)
+{
+        bcm3510_register_value v;
+        int ret;
+        unsigned long t;
+
+        v.raw = 0;
+        if ((ret = bcm3510_writeB(st,0xa0,v)) < 0)
+                return ret;
+
+    t = jiffies + 3*HZ;
+        while (time_before(jiffies, t)) {
+                msleep(10);
+                if ((ret = bcm3510_readB(st,0xa2,&v)) < 0)
+                        return ret;
+
+                /* verify that reset is cleared */
+                if (!v.APSTAT1_a2.RESET)
+                        return 0;
+        }
+        deb_info("reset clear timed out\n");
+        return -ETIMEDOUT;
+}
+
+static int bcm3510_init_cold(struct bcm3510_state *st)
+{
+        int ret;
+        bcm3510_register_value v;
+
+        /* read Acquisation Processor status register and check it is not in RUN mode */
+        if ((ret = bcm3510_readB(st,0xa2,&v)) < 0)
+                return ret;
+        if (v.APSTAT1_a2.RUN) {
+                deb_info("AP is already running - firmware already loaded.\n");
+                return 0;
+        }
+
+        deb_info("reset?\n");
+        if ((ret = bcm3510_reset(st)) < 0)
+                return ret;
+
+        deb_info("tristate?\n");
+        /* tri-state */
+        v.TSTCTL_2e.CTL = 0;
+        if ((ret = bcm3510_writeB(st,0x2e,v)) < 0)
+                return ret;
+
+        deb_info("firmware?\n");
+        if ((ret = bcm3510_download_firmware(&st->frontend)) < 0 ||
+                (ret = bcm3510_clear_reset(st)) < 0)
+                return ret;
+
+        /* anything left here to Let the acquisition processor begin execution at program counter 0000 ??? */
+
+        return 0;
+}
+
+static int bcm3510_init(struct dvb_frontend* fe)
+{
+        struct bcm3510_state* st = fe->demodulator_priv;
+        bcm3510_register_value j;
+        struct bcm3510_hab_cmd_set_agc c;
+        int ret;
+
+        if ((ret = bcm3510_readB(st,0xca,&j)) < 0)
+                return ret;
+
+        deb_info("JDEC: %02x\n",j.raw);
+
+        switch (j.JDEC_ca.JDEC) {
+                case JDEC_WAIT_AT_RAM:
+                        deb_info("attempting to download firmware\n");
+                        if ((ret = bcm3510_init_cold(st)) < 0)
+                                return ret;
+                case JDEC_EEPROM_LOAD_WAIT: /* fall-through is wanted */
+                        deb_info("firmware is loaded\n");
+                        bcm3510_check_firmware_version(st);
+                        break;
+                default:
+                        return -ENODEV;
+        }
+
+        memset(&c,0,1);
+        c.SEL = 1;
+        bcm3510_do_hab_cmd(st,CMD_AUTO_PARAM,MSGID_SET_RF_AGC_SEL,(u8 *)&c,sizeof(c),NULL,0);
+
+        return 0;
+}
+
+
+static struct dvb_frontend_ops bcm3510_ops;
+
+struct dvb_frontend* bcm3510_attach(const struct bcm3510_config *config,
+                                   struct i2c_adapter *i2c)
+{
+        struct bcm3510_state* state = NULL;
+        int ret;
+        bcm3510_register_value v;
+
+        /* allocate memory for the internal state */
+        state = kzalloc(sizeof(struct bcm3510_state), GFP_KERNEL);
+        if (state == NULL)
+                goto error;
+
+        /* setup the state */
+
+        state->config = config;
+        state->i2c = i2c;
+
+        /* create dvb_frontend */
+        memcpy(&state->frontend.ops, &bcm3510_ops, sizeof(struct dvb_frontend_ops));
+        state->frontend.demodulator_priv = state;
+
+        mutex_init(&state->hab_mutex);
+
+        if ((ret = bcm3510_readB(state,0xe0,&v)) < 0)
+                goto error;
+
+        deb_info("Revision: 0x%1x, Layer: 0x%1x.\n",v.REVID_e0.REV,v.REVID_e0.LAYER);
+
+        if ((v.REVID_e0.REV != 0x1 && v.REVID_e0.LAYER != 0xb) && /* cold */
+                (v.REVID_e0.REV != 0x8 && v.REVID_e0.LAYER != 0x0))   /* warm */
+                goto error;
+
+        info("Revision: 0x%1x, Layer: 0x%1x.",v.REVID_e0.REV,v.REVID_e0.LAYER);
+
+        bcm3510_reset(state);
+
+        return &state->frontend;
+
+error:
+        kfree(state);
+        return NULL;
+}
+EXPORT_SYMBOL(bcm3510_attach);
+
+static struct dvb_frontend_ops bcm3510_ops = {
+        .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
+        .info = {
+                .name = "Broadcom BCM3510 VSB/QAM frontend",
+                .frequency_min =  54000000,
+                .frequency_max = 803000000,
+                /* stepsize is just a guess */
+                .frequency_stepsize = 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_8VSB | FE_CAN_16VSB |
+                        FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_128 | FE_CAN_QAM_256
+        },
+
+        .release = bcm3510_release,
+
+        .init = bcm3510_init,
+        .sleep = bcm3510_sleep,
+
+        .set_frontend = bcm3510_set_frontend,
+        .get_tune_settings = bcm3510_get_tune_settings,
+
+        .read_status = bcm3510_read_status,
+        .read_ber = bcm3510_read_ber,
+        .read_signal_strength = bcm3510_read_signal_strength,
+        .read_snr = bcm3510_read_snr,
+        .read_ucblocks = bcm3510_read_unc,
+};
+
+MODULE_DESCRIPTION("Broadcom BCM3510 ATSC (8VSB/16VSB & ITU J83 AnnexB FEC QAM64/256) demodulator driver");
+MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
+MODULE_LICENSE("GPL");