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path: root/drivers/media/dvb-frontends/cxd2099.c
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Diffstat (limited to 'drivers/media/dvb-frontends/cxd2099.c')
-rw-r--r--drivers/media/dvb-frontends/cxd2099.c704
1 files changed, 704 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/cxd2099.c b/drivers/media/dvb-frontends/cxd2099.c
new file mode 100644
index 000000000000..c0a5849b76bb
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2099.c
@@ -0,0 +1,704 @@
+/*
+ * cxd2099.c: Driver for the CXD2099AR Common Interface Controller
+ *
+ * Copyright (C) 2010-2013 Digital Devices GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 only, as published by the Free Software Foundation.
+ *
+ * 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/slab.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/io.h>
+
+#include "cxd2099.h"
+
+static int buffermode;
+module_param(buffermode, int, 0444);
+MODULE_PARM_DESC(buffermode, "Enable CXD2099AR buffer mode (default: disabled)");
+
+static int read_data(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount);
+
+struct cxd {
+ struct dvb_ca_en50221 en;
+
+ struct cxd2099_cfg cfg;
+ struct i2c_client *client;
+ struct regmap *regmap;
+
+ u8 regs[0x23];
+ u8 lastaddress;
+ u8 clk_reg_f;
+ u8 clk_reg_b;
+ int mode;
+ int ready;
+ int dr;
+ int write_busy;
+ int slot_stat;
+
+ u8 amem[1024];
+ int amem_read;
+
+ int cammode;
+ struct mutex lock; /* device access lock */
+
+ u8 rbuf[1028];
+ u8 wbuf[1028];
+};
+
+static int read_block(struct cxd *ci, u8 adr, u8 *data, u16 n)
+{
+ int status = 0;
+
+ if (ci->lastaddress != adr)
+ status = regmap_write(ci->regmap, 0, adr);
+ if (!status) {
+ ci->lastaddress = adr;
+
+ while (n) {
+ int len = n;
+
+ if (ci->cfg.max_i2c && len > ci->cfg.max_i2c)
+ len = ci->cfg.max_i2c;
+ status = regmap_raw_read(ci->regmap, 1, data, len);
+ if (status)
+ return status;
+ data += len;
+ n -= len;
+ }
+ }
+ return status;
+}
+
+static int read_reg(struct cxd *ci, u8 reg, u8 *val)
+{
+ return read_block(ci, reg, val, 1);
+}
+
+static int read_pccard(struct cxd *ci, u16 address, u8 *data, u8 n)
+{
+ int status;
+ u8 addr[2] = {address & 0xff, address >> 8};
+
+ status = regmap_raw_write(ci->regmap, 2, addr, 2);
+ if (!status)
+ status = regmap_raw_read(ci->regmap, 3, data, n);
+ return status;
+}
+
+static int write_pccard(struct cxd *ci, u16 address, u8 *data, u8 n)
+{
+ int status;
+ u8 addr[2] = {address & 0xff, address >> 8};
+
+ status = regmap_raw_write(ci->regmap, 2, addr, 2);
+ if (!status) {
+ u8 buf[256];
+
+ memcpy(buf, data, n);
+ status = regmap_raw_write(ci->regmap, 3, buf, n);
+ }
+ return status;
+}
+
+static int read_io(struct cxd *ci, u16 address, unsigned int *val)
+{
+ int status;
+ u8 addr[2] = {address & 0xff, address >> 8};
+
+ status = regmap_raw_write(ci->regmap, 2, addr, 2);
+ if (!status)
+ status = regmap_read(ci->regmap, 3, val);
+ return status;
+}
+
+static int write_io(struct cxd *ci, u16 address, u8 val)
+{
+ int status;
+ u8 addr[2] = {address & 0xff, address >> 8};
+
+ status = regmap_raw_write(ci->regmap, 2, addr, 2);
+ if (!status)
+ status = regmap_write(ci->regmap, 3, val);
+ return status;
+}
+
+static int write_regm(struct cxd *ci, u8 reg, u8 val, u8 mask)
+{
+ int status = 0;
+ unsigned int regval;
+
+ if (ci->lastaddress != reg)
+ status = regmap_write(ci->regmap, 0, reg);
+ if (!status && reg >= 6 && reg <= 8 && mask != 0xff) {
+ status = regmap_read(ci->regmap, 1, &regval);
+ ci->regs[reg] = regval;
+ }
+ ci->lastaddress = reg;
+ ci->regs[reg] = (ci->regs[reg] & (~mask)) | val;
+ if (!status)
+ status = regmap_write(ci->regmap, 1, ci->regs[reg]);
+ if (reg == 0x20)
+ ci->regs[reg] &= 0x7f;
+ return status;
+}
+
+static int write_reg(struct cxd *ci, u8 reg, u8 val)
+{
+ return write_regm(ci, reg, val, 0xff);
+}
+
+static int write_block(struct cxd *ci, u8 adr, u8 *data, u16 n)
+{
+ int status = 0;
+ u8 *buf = ci->wbuf;
+
+ if (ci->lastaddress != adr)
+ status = regmap_write(ci->regmap, 0, adr);
+ if (status)
+ return status;
+
+ ci->lastaddress = adr;
+ while (n) {
+ int len = n;
+
+ if (ci->cfg.max_i2c && (len + 1 > ci->cfg.max_i2c))
+ len = ci->cfg.max_i2c - 1;
+ memcpy(buf, data, len);
+ status = regmap_raw_write(ci->regmap, 1, buf, len);
+ if (status)
+ return status;
+ n -= len;
+ data += len;
+ }
+ return status;
+}
+
+static void set_mode(struct cxd *ci, int mode)
+{
+ if (mode == ci->mode)
+ return;
+
+ switch (mode) {
+ case 0x00: /* IO mem */
+ write_regm(ci, 0x06, 0x00, 0x07);
+ break;
+ case 0x01: /* ATT mem */
+ write_regm(ci, 0x06, 0x02, 0x07);
+ break;
+ default:
+ break;
+ }
+ ci->mode = mode;
+}
+
+static void cam_mode(struct cxd *ci, int mode)
+{
+ u8 dummy;
+
+ if (mode == ci->cammode)
+ return;
+
+ switch (mode) {
+ case 0x00:
+ write_regm(ci, 0x20, 0x80, 0x80);
+ break;
+ case 0x01:
+ if (!ci->en.read_data)
+ return;
+ ci->write_busy = 0;
+ dev_info(&ci->client->dev, "enable cam buffer mode\n");
+ write_reg(ci, 0x0d, 0x00);
+ write_reg(ci, 0x0e, 0x01);
+ write_regm(ci, 0x08, 0x40, 0x40);
+ read_reg(ci, 0x12, &dummy);
+ write_regm(ci, 0x08, 0x80, 0x80);
+ break;
+ default:
+ break;
+ }
+ ci->cammode = mode;
+}
+
+static int init(struct cxd *ci)
+{
+ int status;
+
+ mutex_lock(&ci->lock);
+ ci->mode = -1;
+ do {
+ status = write_reg(ci, 0x00, 0x00);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x01, 0x00);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x02, 0x10);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x03, 0x00);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x05, 0xFF);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x06, 0x1F);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x07, 0x1F);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x08, 0x28);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x14, 0x20);
+ if (status < 0)
+ break;
+
+ /* TOSTRT = 8, Mode B (gated clock), falling Edge,
+ * Serial, POL=HIGH, MSB
+ */
+ status = write_reg(ci, 0x0A, 0xA7);
+ if (status < 0)
+ break;
+
+ status = write_reg(ci, 0x0B, 0x33);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x0C, 0x33);
+ if (status < 0)
+ break;
+
+ status = write_regm(ci, 0x14, 0x00, 0x0F);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x15, ci->clk_reg_b);
+ if (status < 0)
+ break;
+ status = write_regm(ci, 0x16, 0x00, 0x0F);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x17, ci->clk_reg_f);
+ if (status < 0)
+ break;
+
+ if (ci->cfg.clock_mode == 2) {
+ /* bitrate*2^13/ 72000 */
+ u32 reg = ((ci->cfg.bitrate << 13) + 71999) / 72000;
+
+ if (ci->cfg.polarity) {
+ status = write_reg(ci, 0x09, 0x6f);
+ if (status < 0)
+ break;
+ } else {
+ status = write_reg(ci, 0x09, 0x6d);
+ if (status < 0)
+ break;
+ }
+ status = write_reg(ci, 0x20, 0x08);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x21, (reg >> 8) & 0xff);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x22, reg & 0xff);
+ if (status < 0)
+ break;
+ } else if (ci->cfg.clock_mode == 1) {
+ if (ci->cfg.polarity) {
+ status = write_reg(ci, 0x09, 0x6f); /* D */
+ if (status < 0)
+ break;
+ } else {
+ status = write_reg(ci, 0x09, 0x6d);
+ if (status < 0)
+ break;
+ }
+ status = write_reg(ci, 0x20, 0x68);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x21, 0x00);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x22, 0x02);
+ if (status < 0)
+ break;
+ } else {
+ if (ci->cfg.polarity) {
+ status = write_reg(ci, 0x09, 0x4f); /* C */
+ if (status < 0)
+ break;
+ } else {
+ status = write_reg(ci, 0x09, 0x4d);
+ if (status < 0)
+ break;
+ }
+ status = write_reg(ci, 0x20, 0x28);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x21, 0x00);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x22, 0x07);
+ if (status < 0)
+ break;
+ }
+
+ status = write_regm(ci, 0x20, 0x80, 0x80);
+ if (status < 0)
+ break;
+ status = write_regm(ci, 0x03, 0x02, 0x02);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x01, 0x04);
+ if (status < 0)
+ break;
+ status = write_reg(ci, 0x00, 0x31);
+ if (status < 0)
+ break;
+
+ /* Put TS in bypass */
+ status = write_regm(ci, 0x09, 0x08, 0x08);
+ if (status < 0)
+ break;
+ ci->cammode = -1;
+ cam_mode(ci, 0);
+ } while (0);
+ mutex_unlock(&ci->lock);
+
+ return 0;
+}
+
+static int read_attribute_mem(struct dvb_ca_en50221 *ca,
+ int slot, int address)
+{
+ struct cxd *ci = ca->data;
+ u8 val;
+
+ mutex_lock(&ci->lock);
+ set_mode(ci, 1);
+ read_pccard(ci, address, &val, 1);
+ mutex_unlock(&ci->lock);
+ return val;
+}
+
+static int write_attribute_mem(struct dvb_ca_en50221 *ca, int slot,
+ int address, u8 value)
+{
+ struct cxd *ci = ca->data;
+
+ mutex_lock(&ci->lock);
+ set_mode(ci, 1);
+ write_pccard(ci, address, &value, 1);
+ mutex_unlock(&ci->lock);
+ return 0;
+}
+
+static int read_cam_control(struct dvb_ca_en50221 *ca,
+ int slot, u8 address)
+{
+ struct cxd *ci = ca->data;
+ unsigned int val;
+
+ mutex_lock(&ci->lock);
+ set_mode(ci, 0);
+ read_io(ci, address, &val);
+ mutex_unlock(&ci->lock);
+ return val;
+}
+
+static int write_cam_control(struct dvb_ca_en50221 *ca, int slot,
+ u8 address, u8 value)
+{
+ struct cxd *ci = ca->data;
+
+ mutex_lock(&ci->lock);
+ set_mode(ci, 0);
+ write_io(ci, address, value);
+ mutex_unlock(&ci->lock);
+ return 0;
+}
+
+static int slot_reset(struct dvb_ca_en50221 *ca, int slot)
+{
+ struct cxd *ci = ca->data;
+
+ if (ci->cammode)
+ read_data(ca, slot, ci->rbuf, 0);
+
+ mutex_lock(&ci->lock);
+ cam_mode(ci, 0);
+ write_reg(ci, 0x00, 0x21);
+ write_reg(ci, 0x06, 0x1F);
+ write_reg(ci, 0x00, 0x31);
+ write_regm(ci, 0x20, 0x80, 0x80);
+ write_reg(ci, 0x03, 0x02);
+ ci->ready = 0;
+ ci->mode = -1;
+ {
+ int i;
+
+ for (i = 0; i < 100; i++) {
+ usleep_range(10000, 11000);
+ if (ci->ready)
+ break;
+ }
+ }
+ mutex_unlock(&ci->lock);
+ return 0;
+}
+
+static int slot_shutdown(struct dvb_ca_en50221 *ca, int slot)
+{
+ struct cxd *ci = ca->data;
+
+ dev_dbg(&ci->client->dev, "%s\n", __func__);
+ if (ci->cammode)
+ read_data(ca, slot, ci->rbuf, 0);
+ mutex_lock(&ci->lock);
+ write_reg(ci, 0x00, 0x21);
+ write_reg(ci, 0x06, 0x1F);
+ msleep(300);
+
+ write_regm(ci, 0x09, 0x08, 0x08);
+ write_regm(ci, 0x20, 0x80, 0x80); /* Reset CAM Mode */
+ write_regm(ci, 0x06, 0x07, 0x07); /* Clear IO Mode */
+
+ ci->mode = -1;
+ ci->write_busy = 0;
+ mutex_unlock(&ci->lock);
+ return 0;
+}
+
+static int slot_ts_enable(struct dvb_ca_en50221 *ca, int slot)
+{
+ struct cxd *ci = ca->data;
+
+ mutex_lock(&ci->lock);
+ write_regm(ci, 0x09, 0x00, 0x08);
+ set_mode(ci, 0);
+ cam_mode(ci, 1);
+ mutex_unlock(&ci->lock);
+ return 0;
+}
+
+static int campoll(struct cxd *ci)
+{
+ u8 istat;
+
+ read_reg(ci, 0x04, &istat);
+ if (!istat)
+ return 0;
+ write_reg(ci, 0x05, istat);
+
+ if (istat & 0x40)
+ ci->dr = 1;
+ if (istat & 0x20)
+ ci->write_busy = 0;
+
+ if (istat & 2) {
+ u8 slotstat;
+
+ read_reg(ci, 0x01, &slotstat);
+ if (!(2 & slotstat)) {
+ if (!ci->slot_stat) {
+ ci->slot_stat |=
+ DVB_CA_EN50221_POLL_CAM_PRESENT;
+ write_regm(ci, 0x03, 0x08, 0x08);
+ }
+
+ } else {
+ if (ci->slot_stat) {
+ ci->slot_stat = 0;
+ write_regm(ci, 0x03, 0x00, 0x08);
+ dev_info(&ci->client->dev, "NO CAM\n");
+ ci->ready = 0;
+ }
+ }
+ if ((istat & 8) &&
+ ci->slot_stat == DVB_CA_EN50221_POLL_CAM_PRESENT) {
+ ci->ready = 1;
+ ci->slot_stat |= DVB_CA_EN50221_POLL_CAM_READY;
+ }
+ }
+ return 0;
+}
+
+static int poll_slot_status(struct dvb_ca_en50221 *ca, int slot, int open)
+{
+ struct cxd *ci = ca->data;
+ u8 slotstat;
+
+ mutex_lock(&ci->lock);
+ campoll(ci);
+ read_reg(ci, 0x01, &slotstat);
+ mutex_unlock(&ci->lock);
+
+ return ci->slot_stat;
+}
+
+static int read_data(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount)
+{
+ struct cxd *ci = ca->data;
+ u8 msb, lsb;
+ u16 len;
+
+ mutex_lock(&ci->lock);
+ campoll(ci);
+ mutex_unlock(&ci->lock);
+
+ if (!ci->dr)
+ return 0;
+
+ mutex_lock(&ci->lock);
+ read_reg(ci, 0x0f, &msb);
+ read_reg(ci, 0x10, &lsb);
+ len = ((u16)msb << 8) | lsb;
+ if (len > ecount || len < 2) {
+ /* read it anyway or cxd may hang */
+ read_block(ci, 0x12, ci->rbuf, len);
+ mutex_unlock(&ci->lock);
+ return -EIO;
+ }
+ read_block(ci, 0x12, ebuf, len);
+ ci->dr = 0;
+ mutex_unlock(&ci->lock);
+ return len;
+}
+
+static int write_data(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount)
+{
+ struct cxd *ci = ca->data;
+
+ if (ci->write_busy)
+ return -EAGAIN;
+ mutex_lock(&ci->lock);
+ write_reg(ci, 0x0d, ecount >> 8);
+ write_reg(ci, 0x0e, ecount & 0xff);
+ write_block(ci, 0x11, ebuf, ecount);
+ ci->write_busy = 1;
+ mutex_unlock(&ci->lock);
+ return ecount;
+}
+
+static struct dvb_ca_en50221 en_templ = {
+ .read_attribute_mem = read_attribute_mem,
+ .write_attribute_mem = write_attribute_mem,
+ .read_cam_control = read_cam_control,
+ .write_cam_control = write_cam_control,
+ .slot_reset = slot_reset,
+ .slot_shutdown = slot_shutdown,
+ .slot_ts_enable = slot_ts_enable,
+ .poll_slot_status = poll_slot_status,
+ .read_data = read_data,
+ .write_data = write_data,
+};
+
+static int cxd2099_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct cxd *ci;
+ struct cxd2099_cfg *cfg = client->dev.platform_data;
+ static const struct regmap_config rm_cfg = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ };
+ unsigned int val;
+ int ret;
+
+ ci = kzalloc(sizeof(*ci), GFP_KERNEL);
+ if (!ci) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ ci->client = client;
+ memcpy(&ci->cfg, cfg, sizeof(ci->cfg));
+
+ ci->regmap = regmap_init_i2c(client, &rm_cfg);
+ if (IS_ERR(ci->regmap)) {
+ ret = PTR_ERR(ci->regmap);
+ goto err_kfree;
+ }
+
+ ret = regmap_read(ci->regmap, 0x00, &val);
+ if (ret < 0) {
+ dev_info(&client->dev, "No CXD2099AR detected at 0x%02x\n",
+ client->addr);
+ goto err_rmexit;
+ }
+
+ mutex_init(&ci->lock);
+ ci->lastaddress = 0xff;
+ ci->clk_reg_b = 0x4a;
+ ci->clk_reg_f = 0x1b;
+
+ ci->en = en_templ;
+ ci->en.data = ci;
+ init(ci);
+ dev_info(&client->dev, "Attached CXD2099AR at 0x%02x\n", client->addr);
+
+ *cfg->en = &ci->en;
+
+ if (!buffermode) {
+ ci->en.read_data = NULL;
+ ci->en.write_data = NULL;
+ } else {
+ dev_info(&client->dev, "Using CXD2099AR buffer mode");
+ }
+
+ i2c_set_clientdata(client, ci);
+
+ return 0;
+
+err_rmexit:
+ regmap_exit(ci->regmap);
+err_kfree:
+ kfree(ci);
+err:
+
+ return ret;
+}
+
+static int cxd2099_remove(struct i2c_client *client)
+{
+ struct cxd *ci = i2c_get_clientdata(client);
+
+ regmap_exit(ci->regmap);
+ kfree(ci);
+
+ return 0;
+}
+
+static const struct i2c_device_id cxd2099_id[] = {
+ {"cxd2099", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, cxd2099_id);
+
+static struct i2c_driver cxd2099_driver = {
+ .driver = {
+ .name = "cxd2099",
+ },
+ .probe = cxd2099_probe,
+ .remove = cxd2099_remove,
+ .id_table = cxd2099_id,
+};
+
+module_i2c_driver(cxd2099_driver);
+
+MODULE_DESCRIPTION("CXD2099AR Common Interface controller driver");
+MODULE_AUTHOR("Ralph Metzler");
+MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2024-06-08 00:01:02 +0000