1 files changed, 177 insertions, 0 deletions

diff --git a/drivers/media/video/cx23885/cx23885-f300.c b/drivers/media/video/cx23885/cx23885-f300.c
new file mode 100644
index 00000000000..93998f22098
--- /dev/null
+++ b/drivers/media/video/cx23885/cx23885-f300.c
@@ -0,0 +1,177 @@
+/*
+ * Driver for Silicon Labs C8051F300 microcontroller.
+ *
+ * It is used for LNB power control in TeVii S470,
+ * TBS 6920 PCIe DVB-S2 cards.
+ *
+ * Microcontroller connected to cx23885 GPIO pins:
+ * GPIO0 - data         - P0.3 F300
+ * GPIO1 - reset        - P0.2 F300
+ * GPIO2 - clk          - P0.1 F300
+ * GPIO3 - busy         - P0.0 F300
+ *
+ * Copyright (C) 2009 Igor M. Liplianin <liplianin@me.by>
+ *
+ * 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 "cx23885.h"
+
+#define F300_DATA       GPIO_0
+#define F300_RESET      GPIO_1
+#define F300_CLK        GPIO_2
+#define F300_BUSY       GPIO_3
+
+static void f300_set_line(struct cx23885_dev *dev, u32 line, u8 lvl)
+{
+        cx23885_gpio_enable(dev, line, 1);
+        if (lvl == 1)
+                cx23885_gpio_set(dev, line);
+        else
+                cx23885_gpio_clear(dev, line);
+}
+
+static u8 f300_get_line(struct cx23885_dev *dev, u32 line)
+{
+        cx23885_gpio_enable(dev, line, 0);
+
+        return cx23885_gpio_get(dev, line);
+}
+
+static void f300_send_byte(struct cx23885_dev *dev, u8 dta)
+{
+        u8 i;
+
+        for (i = 0; i < 8; i++) {
+                f300_set_line(dev, F300_CLK, 0);
+                udelay(30);
+                f300_set_line(dev, F300_DATA, (dta & 0x80) >> 7);/* msb first */
+                udelay(30);
+                dta <<= 1;
+                f300_set_line(dev, F300_CLK, 1);
+                udelay(30);
+        }
+}
+
+static u8 f300_get_byte(struct cx23885_dev *dev)
+{
+        u8 i, dta = 0;
+
+        for (i = 0; i < 8; i++) {
+                f300_set_line(dev, F300_CLK, 0);
+                udelay(30);
+                dta <<= 1;
+                f300_set_line(dev, F300_CLK, 1);
+                udelay(30);
+                dta |= f300_get_line(dev, F300_DATA);/* msb first */
+
+        }
+
+        return dta;
+}
+
+static u8 f300_xfer(struct dvb_frontend *fe, u8 *buf)
+{
+        struct cx23885_tsport *port = fe->dvb->priv;
+        struct cx23885_dev *dev = port->dev;
+        u8 i, temp, ret = 0;
+
+        temp = buf[0];
+        for (i = 0; i < buf[0]; i++)
+                temp += buf[i + 1];
+        temp = (~temp + 1);/* get check sum */
+        buf[1 + buf[0]] = temp;
+
+        f300_set_line(dev, F300_RESET, 1);
+        f300_set_line(dev, F300_CLK, 1);
+        udelay(30);
+        f300_set_line(dev, F300_DATA, 1);
+        msleep(1);
+
+        /* question: */
+        f300_set_line(dev, F300_RESET, 0);/* begin to send data */
+        msleep(1);
+
+        f300_send_byte(dev, 0xe0);/* the slave address is 0xe0, write */
+        msleep(1);
+
+        temp = buf[0];
+        temp += 2;
+        for (i = 0; i < temp; i++)
+                f300_send_byte(dev, buf[i]);
+
+        f300_set_line(dev, F300_RESET, 1);/* sent data over */
+        f300_set_line(dev, F300_DATA, 1);
+
+        /* answer: */
+        temp = 0;
+        for (i = 0; ((i < 8) & (temp == 0)); i++) {
+                msleep(1);
+                if (f300_get_line(dev, F300_BUSY) == 0)
+                        temp = 1;
+        }
+
+        if (i > 7) {
+                printk(KERN_ERR "%s: timeout, the slave no response\n",
+                                                                __func__);
+                ret = 1; /* timeout, the slave no response */
+        } else { /* the slave not busy, prepare for getting data */
+                f300_set_line(dev, F300_RESET, 0);/*ready...*/
+                msleep(1);
+                f300_send_byte(dev, 0xe1);/* 0xe1 is Read */
+                msleep(1);
+                temp = f300_get_byte(dev);/*get the data length */
+                if (temp > 14)
+                        temp = 14;
+
+                for (i = 0; i < (temp + 1); i++)
+                        f300_get_byte(dev);/* get data to empty buffer */
+
+                f300_set_line(dev, F300_RESET, 1);/* received data over */
+                f300_set_line(dev, F300_DATA, 1);
+        }
+
+        return ret;
+}
+
+int f300_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
+{
+        u8 buf[16];
+
+        buf[0] = 0x05;
+        buf[1] = 0x38;/* write port */
+        buf[2] = 0x01;/* A port, lnb power */
+
+        switch (voltage) {
+        case SEC_VOLTAGE_13:
+                buf[3] = 0x01;/* power on */
+                buf[4] = 0x02;/* B port, H/V */
+                buf[5] = 0x00;/*13V v*/
+                break;
+        case SEC_VOLTAGE_18:
+                buf[3] = 0x01;
+                buf[4] = 0x02;
+                buf[5] = 0x01;/* 18V h*/
+                break;
+        case SEC_VOLTAGE_OFF:
+                buf[3] = 0x00;/* power off */
+                buf[4] = 0x00;
+                buf[5] = 0x00;
+                break;
+        }
+
+        return f300_xfer(fe, buf);
+}