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-rw-r--r--drivers/media/pci/pt3/Kconfig10
-rw-r--r--drivers/media/pci/pt3/Makefile8
-rw-r--r--drivers/media/pci/pt3/pt3.c876
-rw-r--r--drivers/media/pci/pt3/pt3.h186
-rw-r--r--drivers/media/pci/pt3/pt3_dma.c225
-rw-r--r--drivers/media/pci/pt3/pt3_i2c.c240
6 files changed, 1545 insertions, 0 deletions
diff --git a/drivers/media/pci/pt3/Kconfig b/drivers/media/pci/pt3/Kconfig
new file mode 100644
index 0000000..16c208a
--- /dev/null
+++ b/drivers/media/pci/pt3/Kconfig
@@ -0,0 +1,10 @@
+config DVB_PT3
+ tristate "Earthsoft PT3 cards"
+ depends on DVB_CORE && PCI && I2C
+ select DVB_TC90522 if MEDIA_SUBDRV_AUTOSELECT
+ select MEDIA_TUNER_QM1D1C0042 if MEDIA_SUBDRV_AUTOSELECT
+ select MEDIA_TUNER_MXL301RF if MEDIA_SUBDRV_AUTOSELECT
+ help
+ Support for Earthsoft PT3 PCIe cards.
+
+ Say Y or M if you own such a device and want to use it.
diff --git a/drivers/media/pci/pt3/Makefile b/drivers/media/pci/pt3/Makefile
new file mode 100644
index 0000000..396f146
--- /dev/null
+++ b/drivers/media/pci/pt3/Makefile
@@ -0,0 +1,8 @@
+
+earth-pt3-objs += pt3.o pt3_i2c.o pt3_dma.o
+
+obj-$(CONFIG_DVB_PT3) += earth-pt3.o
+
+ccflags-y += -Idrivers/media/dvb-core
+ccflags-y += -Idrivers/media/dvb-frontends
+ccflags-y += -Idrivers/media/tuners
diff --git a/drivers/media/pci/pt3/pt3.c b/drivers/media/pci/pt3/pt3.c
new file mode 100644
index 0000000..1fdeac1
--- /dev/null
+++ b/drivers/media/pci/pt3/pt3.c
@@ -0,0 +1,876 @@
+/*
+ * Earthsoft PT3 driver
+ *
+ * Copyright (C) 2014 Akihiro Tsukada <tskd08@gmail.com>
+ *
+ * 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/freezer.h>
+#include <linux/kernel.h>
+#include <linux/kthread.h>
+#include <linux/mutex.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/string.h>
+
+#include "dmxdev.h"
+#include "dvbdev.h"
+#include "dvb_demux.h"
+#include "dvb_frontend.h"
+
+#include "pt3.h"
+
+DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
+
+static bool one_adapter;
+module_param(one_adapter, bool, 0444);
+MODULE_PARM_DESC(one_adapter, "Place FE's together under one adapter.");
+
+static int num_bufs = 4;
+module_param(num_bufs, int, 0444);
+MODULE_PARM_DESC(num_bufs, "Number of DMA buffer (188KiB) per FE.");
+
+
+static const struct i2c_algorithm pt3_i2c_algo = {
+ .master_xfer = &pt3_i2c_master_xfer,
+ .functionality = &pt3_i2c_functionality,
+};
+
+static const struct pt3_adap_config adap_conf[PT3_NUM_FE] = {
+ {
+ .demod_info = {
+ I2C_BOARD_INFO(TC90522_I2C_DEV_SAT, 0x11),
+ },
+ .tuner_info = {
+ I2C_BOARD_INFO("qm1d1c0042", 0x63),
+ },
+ .tuner_cfg.qm1d1c0042 = {
+ .lpf = 1,
+ },
+ .init_freq = 1049480 - 300,
+ },
+ {
+ .demod_info = {
+ I2C_BOARD_INFO(TC90522_I2C_DEV_TER, 0x10),
+ },
+ .tuner_info = {
+ I2C_BOARD_INFO("mxl301rf", 0x62),
+ },
+ .init_freq = 515142857,
+ },
+ {
+ .demod_info = {
+ I2C_BOARD_INFO(TC90522_I2C_DEV_SAT, 0x13),
+ },
+ .tuner_info = {
+ I2C_BOARD_INFO("qm1d1c0042", 0x60),
+ },
+ .tuner_cfg.qm1d1c0042 = {
+ .lpf = 1,
+ },
+ .init_freq = 1049480 + 300,
+ },
+ {
+ .demod_info = {
+ I2C_BOARD_INFO(TC90522_I2C_DEV_TER, 0x12),
+ },
+ .tuner_info = {
+ I2C_BOARD_INFO("mxl301rf", 0x61),
+ },
+ .init_freq = 521142857,
+ },
+};
+
+
+struct reg_val {
+ u8 reg;
+ u8 val;
+};
+
+static int
+pt3_demod_write(struct pt3_adapter *adap, const struct reg_val *data, int num)
+{
+ struct i2c_msg msg;
+ int i, ret;
+
+ ret = 0;
+ msg.addr = adap->i2c_demod->addr;
+ msg.flags = 0;
+ msg.len = 2;
+ for (i = 0; i < num; i++) {
+ msg.buf = (u8 *)&data[i];
+ ret = i2c_transfer(adap->i2c_demod->adapter, &msg, 1);
+ if (ret == 0)
+ ret = -EREMOTE;
+ if (ret < 0)
+ return ret;
+ }
+ return 0;
+}
+
+static inline void pt3_lnb_ctrl(struct pt3_board *pt3, bool on)
+{
+ iowrite32((on ? 0x0f : 0x0c), pt3->regs[0] + REG_SYSTEM_W);
+}
+
+static inline struct pt3_adapter *pt3_find_adapter(struct dvb_frontend *fe)
+{
+ struct pt3_board *pt3;
+ int i;
+
+ if (one_adapter) {
+ pt3 = fe->dvb->priv;
+ for (i = 0; i < PT3_NUM_FE; i++)
+ if (pt3->adaps[i]->fe == fe)
+ return pt3->adaps[i];
+ }
+ return container_of(fe->dvb, struct pt3_adapter, dvb_adap);
+}
+
+/*
+ * all 4 tuners in PT3 are packaged in a can module (Sharp VA4M6JC2103).
+ * it seems that they share the power lines and Amp power line and
+ * adaps[3] controls those powers.
+ */
+static int
+pt3_set_tuner_power(struct pt3_board *pt3, bool tuner_on, bool amp_on)
+{
+ struct reg_val rv = { 0x1e, 0x99 };
+
+ if (tuner_on)
+ rv.val |= 0x40;
+ if (amp_on)
+ rv.val |= 0x04;
+ return pt3_demod_write(pt3->adaps[PT3_NUM_FE - 1], &rv, 1);
+}
+
+static int pt3_set_lna(struct dvb_frontend *fe)
+{
+ struct pt3_adapter *adap;
+ struct pt3_board *pt3;
+ u32 val;
+ int ret;
+
+ /* LNA is shared btw. 2 TERR-tuners */
+
+ adap = pt3_find_adapter(fe);
+ val = fe->dtv_property_cache.lna;
+ if (val == LNA_AUTO || val == adap->cur_lna)
+ return 0;
+
+ pt3 = adap->dvb_adap.priv;
+ if (mutex_lock_interruptible(&pt3->lock))
+ return -ERESTARTSYS;
+ if (val)
+ pt3->lna_on_cnt++;
+ else
+ pt3->lna_on_cnt--;
+
+ if (val && pt3->lna_on_cnt <= 1) {
+ pt3->lna_on_cnt = 1;
+ ret = pt3_set_tuner_power(pt3, true, true);
+ } else if (!val && pt3->lna_on_cnt <= 0) {
+ pt3->lna_on_cnt = 0;
+ ret = pt3_set_tuner_power(pt3, true, false);
+ } else
+ ret = 0;
+ mutex_unlock(&pt3->lock);
+ adap->cur_lna = (val != 0);
+ return ret;
+}
+
+static int pt3_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t volt)
+{
+ struct pt3_adapter *adap;
+ struct pt3_board *pt3;
+ bool on;
+
+ /* LNB power is shared btw. 2 SAT-tuners */
+
+ adap = pt3_find_adapter(fe);
+ on = (volt != SEC_VOLTAGE_OFF);
+ if (on == adap->cur_lnb)
+ return 0;
+ adap->cur_lnb = on;
+ pt3 = adap->dvb_adap.priv;
+ if (mutex_lock_interruptible(&pt3->lock))
+ return -ERESTARTSYS;
+ if (on)
+ pt3->lnb_on_cnt++;
+ else
+ pt3->lnb_on_cnt--;
+
+ if (on && pt3->lnb_on_cnt <= 1) {
+ pt3->lnb_on_cnt = 1;
+ pt3_lnb_ctrl(pt3, true);
+ } else if (!on && pt3->lnb_on_cnt <= 0) {
+ pt3->lnb_on_cnt = 0;
+ pt3_lnb_ctrl(pt3, false);
+ }
+ mutex_unlock(&pt3->lock);
+ return 0;
+}
+
+/* register values used in pt3_fe_init() */
+
+static const struct reg_val init0_sat[] = {
+ { 0x03, 0x01 },
+ { 0x1e, 0x10 },
+};
+static const struct reg_val init0_ter[] = {
+ { 0x01, 0x40 },
+ { 0x1c, 0x10 },
+};
+static const struct reg_val cfg_sat[] = {
+ { 0x1c, 0x15 },
+ { 0x1f, 0x04 },
+};
+static const struct reg_val cfg_ter[] = {
+ { 0x1d, 0x01 },
+};
+
+/*
+ * pt3_fe_init: initialize demod sub modules and ISDB-T tuners all at once.
+ *
+ * As for demod IC (TC90522) and ISDB-T tuners (MxL301RF),
+ * the i2c sequences for init'ing them are not public and hidden in a ROM,
+ * and include the board specific configurations as well.
+ * They are stored in a lump and cannot be taken out / accessed separately,
+ * thus cannot be moved to the FE/tuner driver.
+ */
+static int pt3_fe_init(struct pt3_board *pt3)
+{
+ int i, ret;
+ struct dvb_frontend *fe;
+
+ pt3_i2c_reset(pt3);
+ ret = pt3_init_all_demods(pt3);
+ if (ret < 0) {
+ dev_warn(&pt3->pdev->dev, "Failed to init demod chips.");
+ return ret;
+ }
+
+ /* additional config? */
+ for (i = 0; i < PT3_NUM_FE; i++) {
+ fe = pt3->adaps[i]->fe;
+
+ if (fe->ops.delsys[0] == SYS_ISDBS)
+ ret = pt3_demod_write(pt3->adaps[i],
+ init0_sat, ARRAY_SIZE(init0_sat));
+ else
+ ret = pt3_demod_write(pt3->adaps[i],
+ init0_ter, ARRAY_SIZE(init0_ter));
+ if (ret < 0) {
+ dev_warn(&pt3->pdev->dev,
+ "demod[%d] faild in init sequence0.", i);
+ return ret;
+ }
+ ret = fe->ops.init(fe);
+ if (ret < 0)
+ return ret;
+ }
+
+ usleep_range(2000, 4000);
+ ret = pt3_set_tuner_power(pt3, true, false);
+ if (ret < 0) {
+ dev_warn(&pt3->pdev->dev, "Failed to control tuner module.");
+ return ret;
+ }
+
+ /* output pin configuration */
+ for (i = 0; i < PT3_NUM_FE; i++) {
+ fe = pt3->adaps[i]->fe;
+ if (fe->ops.delsys[0] == SYS_ISDBS)
+ ret = pt3_demod_write(pt3->adaps[i],
+ cfg_sat, ARRAY_SIZE(cfg_sat));
+ else
+ ret = pt3_demod_write(pt3->adaps[i],
+ cfg_ter, ARRAY_SIZE(cfg_ter));
+ if (ret < 0) {
+ dev_warn(&pt3->pdev->dev,
+ "demod[%d] faild in init sequence1.", i);
+ return ret;
+ }
+ }
+ usleep_range(4000, 6000);
+
+ for (i = 0; i < PT3_NUM_FE; i++) {
+ fe = pt3->adaps[i]->fe;
+ if (fe->ops.delsys[0] != SYS_ISDBS)
+ continue;
+ /* init and wake-up ISDB-S tuners */
+ ret = fe->ops.tuner_ops.init(fe);
+ if (ret < 0) {
+ dev_warn(&pt3->pdev->dev,
+ "Failed to init SAT-tuner[%d].", i);
+ return ret;
+ }
+ }
+ ret = pt3_init_all_mxl301rf(pt3);
+ if (ret < 0) {
+ dev_warn(&pt3->pdev->dev, "Failed to init TERR-tuners.");
+ return ret;
+ }
+
+ ret = pt3_set_tuner_power(pt3, true, true);
+ if (ret < 0) {
+ dev_warn(&pt3->pdev->dev, "Failed to control tuner module.");
+ return ret;
+ }
+
+ /* Wake up all tuners and make an initial tuning,
+ * in order to avoid interference among the tuners in the module,
+ * according to the doc from the manufacturer.
+ */
+ for (i = 0; i < PT3_NUM_FE; i++) {
+ fe = pt3->adaps[i]->fe;
+ ret = 0;
+ if (fe->ops.delsys[0] == SYS_ISDBT)
+ ret = fe->ops.tuner_ops.init(fe);
+ /* set only when called from pt3_probe(), not resume() */
+ if (ret == 0 && fe->dtv_property_cache.frequency == 0) {
+ fe->dtv_property_cache.frequency =
+ adap_conf[i].init_freq;
+ ret = fe->ops.tuner_ops.set_params(fe);
+ }
+ if (ret < 0) {
+ dev_warn(&pt3->pdev->dev,
+ "Failed in initial tuning of tuner[%d].", i);
+ return ret;
+ }
+ }
+
+ /* and sleep again, waiting to be opened by users. */
+ for (i = 0; i < PT3_NUM_FE; i++) {
+ fe = pt3->adaps[i]->fe;
+ if (fe->ops.tuner_ops.sleep)
+ ret = fe->ops.tuner_ops.sleep(fe);
+ if (ret < 0)
+ break;
+ if (fe->ops.sleep)
+ ret = fe->ops.sleep(fe);
+ if (ret < 0)
+ break;
+ if (fe->ops.delsys[0] == SYS_ISDBS)
+ fe->ops.set_voltage = &pt3_set_voltage;
+ else
+ fe->ops.set_lna = &pt3_set_lna;
+ }
+ if (i < PT3_NUM_FE) {
+ dev_warn(&pt3->pdev->dev, "FE[%d] failed to standby.", i);
+ return ret;
+ }
+ return 0;
+}
+
+
+static int pt3_attach_fe(struct pt3_board *pt3, int i)
+{
+ struct i2c_board_info info;
+ struct tc90522_config cfg;
+ struct i2c_client *cl;
+ struct dvb_adapter *dvb_adap;
+ int ret;
+
+ info = adap_conf[i].demod_info;
+ cfg = adap_conf[i].demod_cfg;
+ cfg.tuner_i2c = NULL;
+ info.platform_data = &cfg;
+
+ ret = -ENODEV;
+ request_module("tc90522");
+ cl = i2c_new_device(&pt3->i2c_adap, &info);
+ if (!cl || !cl->dev.driver)
+ return -ENODEV;
+ pt3->adaps[i]->i2c_demod = cl;
+ if (!try_module_get(cl->dev.driver->owner))
+ goto err_demod_i2c_unregister_device;
+
+ if (!strncmp(cl->name, TC90522_I2C_DEV_SAT, sizeof(cl->name))) {
+ struct qm1d1c0042_config tcfg;
+
+ tcfg = adap_conf[i].tuner_cfg.qm1d1c0042;
+ tcfg.fe = cfg.fe;
+ info = adap_conf[i].tuner_info;
+ info.platform_data = &tcfg;
+ request_module("qm1d1c0042");
+ cl = i2c_new_device(cfg.tuner_i2c, &info);
+ } else {
+ struct mxl301rf_config tcfg;
+
+ tcfg = adap_conf[i].tuner_cfg.mxl301rf;
+ tcfg.fe = cfg.fe;
+ info = adap_conf[i].tuner_info;
+ info.platform_data = &tcfg;
+ request_module("mxl301rf");
+ cl = i2c_new_device(cfg.tuner_i2c, &info);
+ }
+ if (!cl || !cl->dev.driver)
+ goto err_demod_module_put;
+ pt3->adaps[i]->i2c_tuner = cl;
+ if (!try_module_get(cl->dev.driver->owner))
+ goto err_tuner_i2c_unregister_device;
+
+ dvb_adap = &pt3->adaps[one_adapter ? 0 : i]->dvb_adap;
+ ret = dvb_register_frontend(dvb_adap, cfg.fe);
+ if (ret < 0)
+ goto err_tuner_module_put;
+ pt3->adaps[i]->fe = cfg.fe;
+ return 0;
+
+err_tuner_module_put:
+ module_put(pt3->adaps[i]->i2c_tuner->dev.driver->owner);
+err_tuner_i2c_unregister_device:
+ i2c_unregister_device(pt3->adaps[i]->i2c_tuner);
+err_demod_module_put:
+ module_put(pt3->adaps[i]->i2c_demod->dev.driver->owner);
+err_demod_i2c_unregister_device:
+ i2c_unregister_device(pt3->adaps[i]->i2c_demod);
+
+ return ret;
+}
+
+
+static int pt3_fetch_thread(void *data)
+{
+ struct pt3_adapter *adap = data;
+ ktime_t delay;
+ bool was_frozen;
+
+#define PT3_INITIAL_BUF_DROPS 4
+#define PT3_FETCH_DELAY 10
+#define PT3_FETCH_DELAY_DELTA 2
+
+ pt3_init_dmabuf(adap);
+ adap->num_discard = PT3_INITIAL_BUF_DROPS;
+
+ dev_dbg(adap->dvb_adap.device,
+ "PT3: [%s] started.\n", adap->thread->comm);
+ set_freezable();
+ while (!kthread_freezable_should_stop(&was_frozen)) {
+ if (was_frozen)
+ adap->num_discard = PT3_INITIAL_BUF_DROPS;
+
+ pt3_proc_dma(adap);
+
+ delay = ktime_set(0, PT3_FETCH_DELAY * NSEC_PER_MSEC);
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ freezable_schedule_hrtimeout_range(&delay,
+ PT3_FETCH_DELAY_DELTA * NSEC_PER_MSEC,
+ HRTIMER_MODE_REL);
+ }
+ dev_dbg(adap->dvb_adap.device,
+ "PT3: [%s] exited.\n", adap->thread->comm);
+ adap->thread = NULL;
+ return 0;
+}
+
+static int pt3_start_streaming(struct pt3_adapter *adap)
+{
+ struct task_struct *thread;
+
+ /* start fetching thread */
+ thread = kthread_run(pt3_fetch_thread, adap, "pt3-ad%i-dmx%i",
+ adap->dvb_adap.num, adap->dmxdev.dvbdev->id);
+ if (IS_ERR(thread)) {
+ int ret = PTR_ERR(thread);
+
+ dev_warn(adap->dvb_adap.device,
+ "PT3 (adap:%d, dmx:%d): failed to start kthread.\n",
+ adap->dvb_adap.num, adap->dmxdev.dvbdev->id);
+ return ret;
+ }
+ adap->thread = thread;
+
+ return pt3_start_dma(adap);
+}
+
+static int pt3_stop_streaming(struct pt3_adapter *adap)
+{
+ int ret;
+
+ ret = pt3_stop_dma(adap);
+ if (ret)
+ dev_warn(adap->dvb_adap.device,
+ "PT3: failed to stop streaming of adap:%d/FE:%d\n",
+ adap->dvb_adap.num, adap->fe->id);
+
+ /* kill the fetching thread */
+ ret = kthread_stop(adap->thread);
+ return ret;
+}
+
+static int pt3_start_feed(struct dvb_demux_feed *feed)
+{
+ struct pt3_adapter *adap;
+
+ if (signal_pending(current))
+ return -EINTR;
+
+ adap = container_of(feed->demux, struct pt3_adapter, demux);
+ adap->num_feeds++;
+ if (adap->thread)
+ return 0;
+ if (adap->num_feeds != 1) {
+ dev_warn(adap->dvb_adap.device,
+ "%s: unmatched start/stop_feed in adap:%i/dmx:%i.\n",
+ __func__, adap->dvb_adap.num, adap->dmxdev.dvbdev->id);
+ adap->num_feeds = 1;
+ }
+
+ return pt3_start_streaming(adap);
+
+}
+
+static int pt3_stop_feed(struct dvb_demux_feed *feed)
+{
+ struct pt3_adapter *adap;
+
+ adap = container_of(feed->demux, struct pt3_adapter, demux);
+
+ adap->num_feeds--;
+ if (adap->num_feeds > 0 || !adap->thread)
+ return 0;
+ adap->num_feeds = 0;
+
+ return pt3_stop_streaming(adap);
+}
+
+
+static int pt3_alloc_adapter(struct pt3_board *pt3, int index)
+{
+ int ret;
+ struct pt3_adapter *adap;
+ struct dvb_adapter *da;
+
+ adap = kzalloc(sizeof(*adap), GFP_KERNEL);
+ if (!adap) {
+ dev_err(&pt3->pdev->dev, "failed to alloc mem for adapter.\n");
+ return -ENOMEM;
+ }
+ pt3->adaps[index] = adap;
+ adap->adap_idx = index;
+
+ if (index == 0 || !one_adapter) {
+ ret = dvb_register_adapter(&adap->dvb_adap, "PT3 DVB",
+ THIS_MODULE, &pt3->pdev->dev, adapter_nr);
+ if (ret < 0) {
+ dev_err(&pt3->pdev->dev,
+ "failed to register adapter dev.\n");
+ goto err_mem;
+ }
+ da = &adap->dvb_adap;
+ } else
+ da = &pt3->adaps[0]->dvb_adap;
+
+ adap->dvb_adap.priv = pt3;
+ adap->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
+ adap->demux.priv = adap;
+ adap->demux.feednum = 256;
+ adap->demux.filternum = 256;
+ adap->demux.start_feed = pt3_start_feed;
+ adap->demux.stop_feed = pt3_stop_feed;
+ ret = dvb_dmx_init(&adap->demux);
+ if (ret < 0) {
+ dev_err(&pt3->pdev->dev, "failed to init dmx dev.\n");
+ goto err_adap;
+ }
+
+ adap->dmxdev.filternum = 256;
+ adap->dmxdev.demux = &adap->demux.dmx;
+ ret = dvb_dmxdev_init(&adap->dmxdev, da);
+ if (ret < 0) {
+ dev_err(&pt3->pdev->dev, "failed to init dmxdev.\n");
+ goto err_demux;
+ }
+
+ ret = pt3_alloc_dmabuf(adap);
+ if (ret) {
+ dev_err(&pt3->pdev->dev, "failed to alloc DMA buffers.\n");
+ goto err_dmabuf;
+ }
+
+ return 0;
+
+err_dmabuf:
+ pt3_free_dmabuf(adap);
+ dvb_dmxdev_release(&adap->dmxdev);
+err_demux:
+ dvb_dmx_release(&adap->demux);
+err_adap:
+ if (index == 0 || !one_adapter)
+ dvb_unregister_adapter(da);
+err_mem:
+ kfree(adap);
+ pt3->adaps[index] = NULL;
+ return ret;
+}
+
+static void pt3_cleanup_adapter(struct pt3_board *pt3, int index)
+{
+ struct pt3_adapter *adap;
+ struct dmx_demux *dmx;
+
+ adap = pt3->adaps[index];
+ if (adap == NULL)
+ return;
+
+ /* stop demux kthread */
+ if (adap->thread)
+ pt3_stop_streaming(adap);
+
+ dmx = &adap->demux.dmx;
+ dmx->close(dmx);
+ if (adap->fe) {
+ adap->fe->callback = NULL;
+ if (adap->fe->frontend_priv)
+ dvb_unregister_frontend(adap->fe);
+ if (adap->i2c_tuner) {
+ module_put(adap->i2c_tuner->dev.driver->owner);
+ i2c_unregister_device(adap->i2c_tuner);
+ }
+ if (adap->i2c_demod) {
+ module_put(adap->i2c_demod->dev.driver->owner);
+ i2c_unregister_device(adap->i2c_demod);
+ }
+ }
+ pt3_free_dmabuf(adap);
+ dvb_dmxdev_release(&adap->dmxdev);
+ dvb_dmx_release(&adap->demux);
+ if (index == 0 || !one_adapter)
+ dvb_unregister_adapter(&adap->dvb_adap);
+ kfree(adap);
+ pt3->adaps[index] = NULL;
+}
+
+#ifdef CONFIG_PM_SLEEP
+
+static int pt3_suspend(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct pt3_board *pt3 = pci_get_drvdata(pdev);
+ int i;
+ struct pt3_adapter *adap;
+
+ for (i = 0; i < PT3_NUM_FE; i++) {
+ adap = pt3->adaps[i];
+ if (adap->num_feeds > 0)
+ pt3_stop_dma(adap);
+ dvb_frontend_suspend(adap->fe);
+ pt3_free_dmabuf(adap);
+ }
+
+ pt3_lnb_ctrl(pt3, false);
+ pt3_set_tuner_power(pt3, false, false);
+ return 0;
+}
+
+static int pt3_resume(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct pt3_board *pt3 = pci_get_drvdata(pdev);
+ int i, ret;
+ struct pt3_adapter *adap;
+
+ ret = pt3_fe_init(pt3);
+ if (ret)
+ return ret;
+
+ if (pt3->lna_on_cnt > 0)
+ pt3_set_tuner_power(pt3, true, true);
+ if (pt3->lnb_on_cnt > 0)
+ pt3_lnb_ctrl(pt3, true);
+
+ for (i = 0; i < PT3_NUM_FE; i++) {
+ adap = pt3->adaps[i];
+ dvb_frontend_resume(adap->fe);
+ ret = pt3_alloc_dmabuf(adap);
+ if (ret) {
+ dev_err(&pt3->pdev->dev, "failed to alloc DMA bufs.\n");
+ continue;
+ }
+ if (adap->num_feeds > 0)
+ pt3_start_dma(adap);
+ }
+
+ return 0;
+}
+
+#endif /* CONFIG_PM_SLEEP */
+
+
+static void pt3_remove(struct pci_dev *pdev)
+{
+ struct pt3_board *pt3;
+ int i;
+
+ pt3 = pci_get_drvdata(pdev);
+ for (i = PT3_NUM_FE - 1; i >= 0; i--)
+ pt3_cleanup_adapter(pt3, i);
+ i2c_del_adapter(&pt3->i2c_adap);
+ kfree(pt3->i2c_buf);
+ pci_iounmap(pt3->pdev, pt3->regs[0]);
+ pci_iounmap(pt3->pdev, pt3->regs[1]);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ kfree(pt3);
+}
+
+static int pt3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ u8 rev;
+ u32 ver;
+ int i, ret;
+ struct pt3_board *pt3;
+ struct i2c_adapter *i2c;
+
+ if (pci_read_config_byte(pdev, PCI_REVISION_ID, &rev) || rev != 1)
+ return -ENODEV;
+
+ ret = pci_enable_device(pdev);
+ if (ret < 0)
+ return -ENODEV;
+ pci_set_master(pdev);
+
+ ret = pci_request_regions(pdev, DRV_NAME);
+ if (ret < 0)
+ goto err_disable_device;
+
+ ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
+ if (ret == 0)
+ dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
+ else {
+ ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
+ if (ret == 0)
+ dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+ else {
+ dev_err(&pdev->dev, "Failed to set DMA mask.\n");
+ goto err_release_regions;
+ }
+ dev_info(&pdev->dev, "Use 32bit DMA.\n");
+ }
+
+ pt3 = kzalloc(sizeof(*pt3), GFP_KERNEL);
+ if (!pt3) {
+ dev_err(&pdev->dev, "Failed to alloc mem for this dev.\n");
+ ret = -ENOMEM;
+ goto err_release_regions;
+ }
+ pci_set_drvdata(pdev, pt3);
+ pt3->pdev = pdev;
+ mutex_init(&pt3->lock);
+ pt3->regs[0] = pci_ioremap_bar(pdev, 0);
+ pt3->regs[1] = pci_ioremap_bar(pdev, 2);
+ if (pt3->regs[0] == NULL || pt3->regs[1] == NULL) {
+ dev_err(&pdev->dev, "Failed to ioremap.\n");
+ ret = -ENOMEM;
+ goto err_kfree;
+ }
+
+ ver = ioread32(pt3->regs[0] + REG_VERSION);
+ if ((ver >> 16) != 0x0301) {
+ dev_warn(&pdev->dev, "PT%d, I/F-ver.:%d not supported",
+ ver >> 24, (ver & 0x00ff0000) >> 16);
+ ret = -ENODEV;
+ goto err_iounmap;
+ }
+
+ pt3->num_bufs = clamp_val(num_bufs, MIN_DATA_BUFS, MAX_DATA_BUFS);
+
+ pt3->i2c_buf = kmalloc(sizeof(*pt3->i2c_buf), GFP_KERNEL);
+ if (pt3->i2c_buf == NULL) {
+ dev_err(&pdev->dev, "Failed to alloc mem for i2c.\n");
+ ret = -ENOMEM;
+ goto err_iounmap;
+ }
+ i2c = &pt3->i2c_adap;
+ i2c->owner = THIS_MODULE;
+ i2c->algo = &pt3_i2c_algo;
+ i2c->algo_data = NULL;
+ i2c->dev.parent = &pdev->dev;
+ strlcpy(i2c->name, DRV_NAME, sizeof(i2c->name));
+ i2c_set_adapdata(i2c, pt3);
+ ret = i2c_add_adapter(i2c);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to add i2c adapter.\n");
+ goto err_i2cbuf;
+ }
+
+ for (i = 0; i < PT3_NUM_FE; i++) {
+ ret = pt3_alloc_adapter(pt3, i);
+ if (ret < 0)
+ break;
+
+ ret = pt3_attach_fe(pt3, i);
+ if (ret < 0)
+ break;
+ }
+ if (i < PT3_NUM_FE) {
+ dev_err(&pdev->dev, "Failed to create FE%d.\n", i);
+ goto err_cleanup_adapters;
+ }
+
+ ret = pt3_fe_init(pt3);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to init frontends.\n");
+ i = PT3_NUM_FE - 1;
+ goto err_cleanup_adapters;
+ }
+
+ dev_info(&pdev->dev,
+ "successfully init'ed PT%d (fw:0x%02x, I/F:0x%02x).\n",
+ ver >> 24, (ver >> 8) & 0xff, (ver >> 16) & 0xff);
+ return 0;
+
+err_cleanup_adapters:
+ while (i >= 0)
+ pt3_cleanup_adapter(pt3, i--);
+ i2c_del_adapter(i2c);
+err_i2cbuf:
+ kfree(pt3->i2c_buf);
+err_iounmap:
+ if (pt3->regs[0])
+ pci_iounmap(pdev, pt3->regs[0]);
+ if (pt3->regs[1])
+ pci_iounmap(pdev, pt3->regs[1]);
+err_kfree:
+ kfree(pt3);
+err_release_regions:
+ pci_release_regions(pdev);
+err_disable_device:
+ pci_disable_device(pdev);
+ return ret;
+
+}
+
+static const struct pci_device_id pt3_id_table[] = {
+ { PCI_DEVICE_SUB(0x1172, 0x4c15, 0xee8d, 0x0368) },
+ { },
+};
+MODULE_DEVICE_TABLE(pci, pt3_id_table);
+
+static SIMPLE_DEV_PM_OPS(pt3_pm_ops, pt3_suspend, pt3_resume);
+
+static struct pci_driver pt3_driver = {
+ .name = DRV_NAME,
+ .probe = pt3_probe,
+ .remove = pt3_remove,
+ .id_table = pt3_id_table,
+
+ .driver.pm = &pt3_pm_ops,
+};
+
+module_pci_driver(pt3_driver);
+
+MODULE_DESCRIPTION("Earthsoft PT3 Driver");
+MODULE_AUTHOR("Akihiro TSUKADA");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/pci/pt3/pt3.h b/drivers/media/pci/pt3/pt3.h
new file mode 100644
index 0000000..1b3f2ad
--- /dev/null
+++ b/drivers/media/pci/pt3/pt3.h
@@ -0,0 +1,186 @@
+/*
+ * Earthsoft PT3 driver
+ *
+ * Copyright (C) 2014 Akihiro Tsukada <tskd08@gmail.com>
+ *
+ * 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.
+ */
+
+#ifndef PT3_H
+#define PT3_H
+
+#include <linux/atomic.h>
+#include <linux/types.h>
+
+#include "dvb_demux.h"
+#include "dvb_frontend.h"
+#include "dmxdev.h"
+
+#include "tc90522.h"
+#include "mxl301rf.h"
+#include "qm1d1c0042.h"
+
+#define DRV_NAME KBUILD_MODNAME
+
+#define PT3_NUM_FE 4
+
+/*
+ * register index of the FPGA chip
+ */
+#define REG_VERSION 0x00
+#define REG_BUS 0x04
+#define REG_SYSTEM_W 0x08
+#define REG_SYSTEM_R 0x0c
+#define REG_I2C_W 0x10
+#define REG_I2C_R 0x14
+#define REG_RAM_W 0x18
+#define REG_RAM_R 0x1c
+#define REG_DMA_BASE 0x40 /* regs for FE[i] = REG_DMA_BASE + 0x18 * i */
+#define OFST_DMA_DESC_L 0x00
+#define OFST_DMA_DESC_H 0x04
+#define OFST_DMA_CTL 0x08
+#define OFST_TS_CTL 0x0c
+#define OFST_STATUS 0x10
+#define OFST_TS_ERR 0x14
+
+/*
+ * internal buffer for I2C
+ */
+#define PT3_I2C_MAX 4091
+struct pt3_i2cbuf {
+ u8 data[PT3_I2C_MAX];
+ u8 tmp;
+ u32 num_cmds;
+};
+
+/*
+ * DMA things
+ */
+#define TS_PACKET_SZ 188
+/* DMA transfers must not cross 4GiB, so use one page / transfer */
+#define DATA_XFER_SZ 4096
+#define DATA_BUF_XFERS 47
+/* (num_bufs * DATA_BUF_SZ) % TS_PACKET_SZ must be 0 */
+#define DATA_BUF_SZ (DATA_BUF_XFERS * DATA_XFER_SZ)
+#define MAX_DATA_BUFS 16
+#define MIN_DATA_BUFS 2
+
+#define DESCS_IN_PAGE (PAGE_SIZE / sizeof(struct xfer_desc))
+#define MAX_NUM_XFERS (MAX_DATA_BUFS * DATA_BUF_XFERS)
+#define MAX_DESC_BUFS DIV_ROUND_UP(MAX_NUM_XFERS, DESCS_IN_PAGE)
+
+/* DMA transfer description.
+ * device is passed a pointer to this struct, dma-reads it,
+ * and gets the DMA buffer ring for storing TS data.
+ */
+struct xfer_desc {
+ u32 addr_l; /* bus address of target data buffer */
+ u32 addr_h;
+ u32 size;
+ u32 next_l; /* bus adddress of the next xfer_desc */
+ u32 next_h;
+};
+
+/* A DMA mapping of a page containing xfer_desc's */
+struct xfer_desc_buffer {
+ dma_addr_t b_addr;
+ struct xfer_desc *descs; /* PAGE_SIZE (xfer_desc[DESCS_IN_PAGE]) */
+};
+
+/* A DMA mapping of a data buffer */
+struct dma_data_buffer {
+ dma_addr_t b_addr;
+ u8 *data; /* size: u8[PAGE_SIZE] */
+};
+
+/*
+ * device things
+ */
+struct pt3_adap_config {
+ struct i2c_board_info demod_info;
+ struct tc90522_config demod_cfg;
+
+ struct i2c_board_info tuner_info;
+ union tuner_config {
+ struct qm1d1c0042_config qm1d1c0042;
+ struct mxl301rf_config mxl301rf;
+ } tuner_cfg;
+ u32 init_freq;
+};
+
+struct pt3_adapter {
+ struct dvb_adapter dvb_adap; /* dvb_adap.priv => struct pt3_board */
+ int adap_idx;
+
+ struct dvb_demux demux;
+ struct dmxdev dmxdev;
+ struct dvb_frontend *fe;
+ struct i2c_client *i2c_demod;
+ struct i2c_client *i2c_tuner;
+
+ /* data fetch thread */
+ struct task_struct *thread;
+ int num_feeds;
+
+ bool cur_lna;
+ bool cur_lnb; /* current LNB power status (on/off) */
+
+ /* items below are for DMA */
+ struct dma_data_buffer buffer[MAX_DATA_BUFS];
+ int buf_idx;
+ int buf_ofs;
+ int num_bufs; /* == pt3_board->num_bufs */
+ int num_discard; /* how many access units to discard initially */
+
+ struct xfer_desc_buffer desc_buf[MAX_DESC_BUFS];
+ int num_desc_bufs; /* == num_bufs * DATA_BUF_XFERS / DESCS_IN_PAGE */
+};
+
+
+struct pt3_board {
+ struct pci_dev *pdev;
+ void __iomem *regs[2];
+ /* regs[0]: registers, regs[1]: internal memory, used for I2C */
+
+ struct mutex lock;
+
+ /* LNB power shared among sat-FEs */
+ int lnb_on_cnt; /* LNB power on count */
+
+ /* LNA shared among terr-FEs */
+ int lna_on_cnt; /* booster enabled count */
+
+ int num_bufs; /* number of DMA buffers allocated/mapped per FE */
+
+ struct i2c_adapter i2c_adap;
+ struct pt3_i2cbuf *i2c_buf;
+
+ struct pt3_adapter *adaps[PT3_NUM_FE];
+};
+
+
+/*
+ * prototypes
+ */
+extern int pt3_alloc_dmabuf(struct pt3_adapter *adap);
+extern void pt3_init_dmabuf(struct pt3_adapter *adap);
+extern void pt3_free_dmabuf(struct pt3_adapter *adap);
+extern int pt3_start_dma(struct pt3_adapter *adap);
+extern int pt3_stop_dma(struct pt3_adapter *adap);
+extern int pt3_proc_dma(struct pt3_adapter *adap);
+
+extern int pt3_i2c_master_xfer(struct i2c_adapter *adap,
+ struct i2c_msg *msgs, int num);
+extern u32 pt3_i2c_functionality(struct i2c_adapter *adap);
+extern void pt3_i2c_reset(struct pt3_board *pt3);
+extern int pt3_init_all_demods(struct pt3_board *pt3);
+extern int pt3_init_all_mxl301rf(struct pt3_board *pt3);
+#endif /* PT3_H */
diff --git a/drivers/media/pci/pt3/pt3_dma.c b/drivers/media/pci/pt3/pt3_dma.c
new file mode 100644
index 0000000..f0ce904
--- /dev/null
+++ b/drivers/media/pci/pt3/pt3_dma.c
@@ -0,0 +1,225 @@
+/*
+ * Earthsoft PT3 driver
+ *
+ * Copyright (C) 2014 Akihiro Tsukada <tskd08@gmail.com>
+ *
+ * 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/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+
+#include "pt3.h"
+
+#define PT3_ACCESS_UNIT (TS_PACKET_SZ * 128)
+#define PT3_BUF_CANARY (0x74)
+
+static u32 get_dma_base(int idx)
+{
+ int i;
+
+ i = (idx == 1 || idx == 2) ? 3 - idx : idx;
+ return REG_DMA_BASE + 0x18 * i;
+}
+
+int pt3_stop_dma(struct pt3_adapter *adap)
+{
+ struct pt3_board *pt3 = adap->dvb_adap.priv;
+ u32 base;
+ u32 stat;
+ int retry;
+
+ base = get_dma_base(adap->adap_idx);
+ stat = ioread32(pt3->regs[0] + base + OFST_STATUS);
+ if (!(stat & 0x01))
+ return 0;
+
+ iowrite32(0x02, pt3->regs[0] + base + OFST_DMA_CTL);
+ for (retry = 0; retry < 5; retry++) {
+ stat = ioread32(pt3->regs[0] + base + OFST_STATUS);
+ if (!(stat & 0x01))
+ return 0;
+ msleep(50);
+ }
+ return -EIO;
+}
+
+int pt3_start_dma(struct pt3_adapter *adap)
+{
+ struct pt3_board *pt3 = adap->dvb_adap.priv;
+ u32 base = get_dma_base(adap->adap_idx);
+
+ iowrite32(0x02, pt3->regs[0] + base + OFST_DMA_CTL);
+ iowrite32(lower_32_bits(adap->desc_buf[0].b_addr),
+ pt3->regs[0] + base + OFST_DMA_DESC_L);
+ iowrite32(upper_32_bits(adap->desc_buf[0].b_addr),
+ pt3->regs[0] + base + OFST_DMA_DESC_H);
+ iowrite32(0x01, pt3->regs[0] + base + OFST_DMA_CTL);
+ return 0;
+}
+
+
+static u8 *next_unit(struct pt3_adapter *adap, int *idx, int *ofs)
+{
+ *ofs += PT3_ACCESS_UNIT;
+ if (*ofs >= DATA_BUF_SZ) {
+ *ofs -= DATA_BUF_SZ;
+ (*idx)++;
+ if (*idx == adap->num_bufs)
+ *idx = 0;
+ }
+ return &adap->buffer[*idx].data[*ofs];
+}
+
+int pt3_proc_dma(struct pt3_adapter *adap)
+{
+ int idx, ofs;
+
+ idx = adap->buf_idx;
+ ofs = adap->buf_ofs;
+
+ if (adap->buffer[idx].data[ofs] == PT3_BUF_CANARY)
+ return 0;
+
+ while (*next_unit(adap, &idx, &ofs) != PT3_BUF_CANARY) {
+ u8 *p;
+
+ p = &adap->buffer[adap->buf_idx].data[adap->buf_ofs];
+ if (adap->num_discard > 0)
+ adap->num_discard--;
+ else if (adap->buf_ofs + PT3_ACCESS_UNIT > DATA_BUF_SZ) {
+ dvb_dmx_swfilter_packets(&adap->demux, p,
+ (DATA_BUF_SZ - adap->buf_ofs) / TS_PACKET_SZ);
+ dvb_dmx_swfilter_packets(&adap->demux,
+ adap->buffer[idx].data, ofs / TS_PACKET_SZ);
+ } else
+ dvb_dmx_swfilter_packets(&adap->demux, p,
+ PT3_ACCESS_UNIT / TS_PACKET_SZ);
+
+ *p = PT3_BUF_CANARY;
+ adap->buf_idx = idx;
+ adap->buf_ofs = ofs;
+ }
+ return 0;
+}
+
+void pt3_init_dmabuf(struct pt3_adapter *adap)
+{
+ int idx, ofs;
+ u8 *p;
+
+ idx = 0;
+ ofs = 0;
+ p = adap->buffer[0].data;
+ /* mark the whole buffers as "not written yet" */
+ while (idx < adap->num_bufs) {
+ p[ofs] = PT3_BUF_CANARY;
+ ofs += PT3_ACCESS_UNIT;
+ if (ofs >= DATA_BUF_SZ) {
+ ofs -= DATA_BUF_SZ;
+ idx++;
+ p = adap->buffer[idx].data;
+ }
+ }
+ adap->buf_idx = 0;
+ adap->buf_ofs = 0;
+}
+
+void pt3_free_dmabuf(struct pt3_adapter *adap)
+{
+ struct pt3_board *pt3;
+ int i;
+
+ pt3 = adap->dvb_adap.priv;
+ for (i = 0; i < adap->num_bufs; i++)
+ dma_free_coherent(&pt3->pdev->dev, DATA_BUF_SZ,
+ adap->buffer[i].data, adap->buffer[i].b_addr);
+ adap->num_bufs = 0;
+
+ for (i = 0; i < adap->num_desc_bufs; i++)
+ dma_free_coherent(&pt3->pdev->dev, PAGE_SIZE,
+ adap->desc_buf[i].descs, adap->desc_buf[i].b_addr);
+ adap->num_desc_bufs = 0;
+}
+
+
+int pt3_alloc_dmabuf(struct pt3_adapter *adap)
+{
+ struct pt3_board *pt3;
+ void *p;
+ int i, j;
+ int idx, ofs;
+ int num_desc_bufs;
+ dma_addr_t data_addr, desc_addr;
+ struct xfer_desc *d;
+
+ pt3 = adap->dvb_adap.priv;
+ adap->num_bufs = 0;
+ adap->num_desc_bufs = 0;
+ for (i = 0; i < pt3->num_bufs; i++) {
+ p = dma_alloc_coherent(&pt3->pdev->dev, DATA_BUF_SZ,
+ &adap->buffer[i].b_addr, GFP_KERNEL);
+ if (p == NULL)
+ goto failed;
+ adap->buffer[i].data = p;
+ adap->num_bufs++;
+ }
+ pt3_init_dmabuf(adap);
+
+ /* build circular-linked pointers (xfer_desc) to the data buffers*/
+ idx = 0;
+ ofs = 0;
+ num_desc_bufs =
+ DIV_ROUND_UP(adap->num_bufs * DATA_BUF_XFERS, DESCS_IN_PAGE);
+ for (i = 0; i < num_desc_bufs; i++) {
+ p = dma_alloc_coherent(&pt3->pdev->dev, PAGE_SIZE,
+ &desc_addr, GFP_KERNEL);
+ if (p == NULL)
+ goto failed;
+ adap->num_desc_bufs++;
+ adap->desc_buf[i].descs = p;
+ adap->desc_buf[i].b_addr = desc_addr;
+
+ if (i > 0) {
+ d = &adap->desc_buf[i - 1].descs[DESCS_IN_PAGE - 1];
+ d->next_l = lower_32_bits(desc_addr);
+ d->next_h = upper_32_bits(desc_addr);
+ }
+ for (j = 0; j < DESCS_IN_PAGE; j++) {
+ data_addr = adap->buffer[idx].b_addr + ofs;
+ d = &adap->desc_buf[i].descs[j];
+ d->addr_l = lower_32_bits(data_addr);
+ d->addr_h = upper_32_bits(data_addr);
+ d->size = DATA_XFER_SZ;
+
+ desc_addr += sizeof(struct xfer_desc);
+ d->next_l = lower_32_bits(desc_addr);
+ d->next_h = upper_32_bits(desc_addr);
+
+ ofs += DATA_XFER_SZ;
+ if (ofs >= DATA_BUF_SZ) {
+ ofs -= DATA_BUF_SZ;
+ idx++;
+ if (idx >= adap->num_bufs) {
+ desc_addr = adap->desc_buf[0].b_addr;
+ d->next_l = lower_32_bits(desc_addr);
+ d->next_h = upper_32_bits(desc_addr);
+ return 0;
+ }
+ }
+ }
+ }
+ return 0;
+
+failed:
+ pt3_free_dmabuf(adap);
+ return -ENOMEM;
+}
diff --git a/drivers/media/pci/pt3/pt3_i2c.c b/drivers/media/pci/pt3/pt3_i2c.c
new file mode 100644
index 0000000..ec6a8a2
--- /dev/null
+++ b/drivers/media/pci/pt3/pt3_i2c.c
@@ -0,0 +1,240 @@
+/*
+ * Earthsoft PT3 driver
+ *
+ * Copyright (C) 2014 Akihiro Tsukada <tskd08@gmail.com>
+ *
+ * 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/delay.h>
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/io.h>
+#include <linux/pci.h>
+
+#include "pt3.h"
+
+#define PT3_I2C_BASE 2048
+#define PT3_CMD_ADDR_NORMAL 0
+#define PT3_CMD_ADDR_INIT_DEMOD 4096
+#define PT3_CMD_ADDR_INIT_TUNER (4096 + 2042)
+
+/* masks for I2C status register */
+#define STAT_SEQ_RUNNING 0x1
+#define STAT_SEQ_ERROR 0x6
+#define STAT_NO_SEQ 0x8
+
+#define PT3_I2C_RUN (1 << 16)
+#define PT3_I2C_RESET (1 << 17)
+
+enum ctl_cmd {
+ I_END,
+ I_ADDRESS,
+ I_CLOCK_L,
+ I_CLOCK_H,
+ I_DATA_L,
+ I_DATA_H,
+ I_RESET,
+ I_SLEEP,
+ I_DATA_L_NOP = 0x08,
+ I_DATA_H_NOP = 0x0c,
+ I_DATA_H_READ = 0x0d,
+ I_DATA_H_ACK0 = 0x0e,
+ I_DATA_H_ACK1 = 0x0f,
+};
+
+
+static void cmdbuf_add(struct pt3_i2cbuf *cbuf, enum ctl_cmd cmd)
+{
+ int buf_idx;
+
+ if ((cbuf->num_cmds % 2) == 0)
+ cbuf->tmp = cmd;
+ else {
+ cbuf->tmp |= cmd << 4;
+ buf_idx = cbuf->num_cmds / 2;
+ if (buf_idx < ARRAY_SIZE(cbuf->data))
+ cbuf->data[buf_idx] = cbuf->tmp;
+ }
+ cbuf->num_cmds++;
+}
+
+static void put_end(struct pt3_i2cbuf *cbuf)
+{
+ cmdbuf_add(cbuf, I_END);
+ if (cbuf->num_cmds % 2)
+ cmdbuf_add(cbuf, I_END);
+}
+
+static void put_start(struct pt3_i2cbuf *cbuf)
+{
+ cmdbuf_add(cbuf, I_DATA_H);
+ cmdbuf_add(cbuf, I_CLOCK_H);
+ cmdbuf_add(cbuf, I_DATA_L);
+ cmdbuf_add(cbuf, I_CLOCK_L);
+}
+
+static void put_byte_write(struct pt3_i2cbuf *cbuf, u8 val)
+{
+ u8 mask;
+
+ mask = 0x80;
+ for (mask = 0x80; mask > 0; mask >>= 1)
+ cmdbuf_add(cbuf, (val & mask) ? I_DATA_H_NOP : I_DATA_L_NOP);
+ cmdbuf_add(cbuf, I_DATA_H_ACK0);
+}
+
+static void put_byte_read(struct pt3_i2cbuf *cbuf, u32 size)
+{
+ int i, j;
+
+ for (i = 0; i < size; i++) {
+ for (j = 0; j < 8; j++)
+ cmdbuf_add(cbuf, I_DATA_H_READ);
+ cmdbuf_add(cbuf, (i == size - 1) ? I_DATA_H_NOP : I_DATA_L_NOP);
+ }
+}
+
+static void put_stop(struct pt3_i2cbuf *cbuf)
+{
+ cmdbuf_add(cbuf, I_DATA_L);
+ cmdbuf_add(cbuf, I_CLOCK_H);
+ cmdbuf_add(cbuf, I_DATA_H);
+}
+
+
+/* translates msgs to internal commands for bit-banging */
+static void translate(struct pt3_i2cbuf *cbuf, struct i2c_msg *msgs, int num)
+{
+ int i, j;
+ bool rd;
+
+ cbuf->num_cmds = 0;
+ for (i = 0; i < num; i++) {
+ rd = !!(msgs[i].flags & I2C_M_RD);
+ put_start(cbuf);
+ put_byte_write(cbuf, msgs[i].addr << 1 | rd);
+ if (rd)
+ put_byte_read(cbuf, msgs[i].len);
+ else
+ for (j = 0; j < msgs[i].len; j++)
+ put_byte_write(cbuf, msgs[i].buf[j]);
+ }
+ if (num > 0) {
+ put_stop(cbuf);
+ put_end(cbuf);
+ }
+}
+
+static int wait_i2c_result(struct pt3_board *pt3, u32 *result, int max_wait)
+{
+ int i;
+ u32 v;
+
+ for (i = 0; i < max_wait; i++) {
+ v = ioread32(pt3->regs[0] + REG_I2C_R);
+ if (!(v & STAT_SEQ_RUNNING))
+ break;
+ usleep_range(500, 750);
+ }
+ if (i >= max_wait)
+ return -EIO;
+ if (result)
+ *result = v;
+ return 0;
+}
+
+/* send [pre-]translated i2c msgs stored at addr */
+static int send_i2c_cmd(struct pt3_board *pt3, u32 addr)
+{
+ u32 ret;
+
+ /* make sure that previous transactions had finished */
+ if (wait_i2c_result(pt3, NULL, 50)) {
+ dev_warn(&pt3->pdev->dev, "(%s) prev. transaction stalled\n",
+ __func__);
+ return -EIO;
+ }
+
+ iowrite32(PT3_I2C_RUN | addr, pt3->regs[0] + REG_I2C_W);
+ usleep_range(200, 300);
+ /* wait for the current transaction to finish */
+ if (wait_i2c_result(pt3, &ret, 500) || (ret & STAT_SEQ_ERROR)) {
+ dev_warn(&pt3->pdev->dev, "(%s) failed.\n", __func__);
+ return -EIO;
+ }
+ return 0;
+}
+
+
+/* init commands for each demod are combined into one transaction
+ * and hidden in ROM with the address PT3_CMD_ADDR_INIT_DEMOD.
+ */
+int pt3_init_all_demods(struct pt3_board *pt3)
+{
+ ioread32(pt3->regs[0] + REG_I2C_R);
+ return send_i2c_cmd(pt3, PT3_CMD_ADDR_INIT_DEMOD);
+}
+
+/* init commands for two ISDB-T tuners are hidden in ROM. */
+int pt3_init_all_mxl301rf(struct pt3_board *pt3)
+{
+ usleep_range(1000, 2000);
+ return send_i2c_cmd(pt3, PT3_CMD_ADDR_INIT_TUNER);
+}
+
+void pt3_i2c_reset(struct pt3_board *pt3)
+{
+ iowrite32(PT3_I2C_RESET, pt3->regs[0] + REG_I2C_W);
+}
+
+/*
+ * I2C algorithm
+ */
+int
+pt3_i2c_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
+{
+ struct pt3_board *pt3;
+ struct pt3_i2cbuf *cbuf;
+ int i;
+ void __iomem *p;
+
+ pt3 = i2c_get_adapdata(adap);
+ cbuf = pt3->i2c_buf;
+
+ for (i = 0; i < num; i++)
+ if (msgs[i].flags & I2C_M_RECV_LEN) {
+ dev_warn(&pt3->pdev->dev,
+ "(%s) I2C_M_RECV_LEN not supported.\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ translate(cbuf, msgs, num);
+ memcpy_toio(pt3->regs[1] + PT3_I2C_BASE + PT3_CMD_ADDR_NORMAL / 2,
+ cbuf->data, cbuf->num_cmds);
+
+ if (send_i2c_cmd(pt3, PT3_CMD_ADDR_NORMAL) < 0)
+ return -EIO;
+
+ p = pt3->regs[1] + PT3_I2C_BASE;
+ for (i = 0; i < num; i++)
+ if ((msgs[i].flags & I2C_M_RD) && msgs[i].len > 0) {
+ memcpy_fromio(msgs[i].buf, p, msgs[i].len);
+ p += msgs[i].len;
+ }
+
+ return num;
+}
+
+u32 pt3_i2c_functionality(struct i2c_adapter *adap)
+{
+ return I2C_FUNC_I2C;
+}

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