--- /dev/null
+/*
+ * tm6000-i2c.c - driver for TM5600/TM6000/TM6010 USB video capture devices
+ *
+ * Copyright (C) 2006-2007 Mauro Carvalho Chehab <mchehab@infradead.org>
+ *
+ * Copyright (C) 2007 Michel Ludwig <michel.ludwig@gmail.com>
+ * - Fix SMBus Read Byte command
+ *
+ * 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.
+ *
+ * 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/module.h>
+#include <linux/kernel.h>
+#include <linux/usb.h>
+#include <linux/i2c.h>
+
+#include "tm6000.h"
+#include "tm6000-regs.h"
+#include <media/v4l2-common.h>
+#include <media/tuner.h>
+#include "tuner-xc2028.h"
+
+
+/* ----------------------------------------------------------- */
+
+static unsigned int i2c_debug;
+module_param(i2c_debug, int, 0644);
+MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
+
+#define i2c_dprintk(lvl, fmt, args...) if (i2c_debug >= lvl) do { \
+ printk(KERN_DEBUG "%s at %s: " fmt, \
+ dev->name, __func__, ##args); } while (0)
+
+static int tm6000_i2c_send_regs(struct tm6000_core *dev, unsigned char addr,
+ __u8 reg, char *buf, int len)
+{
+ int rc;
+ unsigned int i2c_packet_limit = 16;
+
+ if (dev->dev_type == TM6010)
+ i2c_packet_limit = 80;
+
+ if (!buf)
+ return -1;
+
+ if (len < 1 || len > i2c_packet_limit) {
+ printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n",
+ len, i2c_packet_limit);
+ return -1;
+ }
+
+ /* capture mutex */
+ rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN,
+ addr | reg << 8, 0, buf, len);
+
+ if (rc < 0) {
+ /* release mutex */
+ return rc;
+ }
+
+ /* release mutex */
+ return rc;
+}
+
+/* Generic read - doesn't work fine with 16bit registers */
+static int tm6000_i2c_recv_regs(struct tm6000_core *dev, unsigned char addr,
+ __u8 reg, char *buf, int len)
+{
+ int rc;
+ u8 b[2];
+ unsigned int i2c_packet_limit = 16;
+
+ if (dev->dev_type == TM6010)
+ i2c_packet_limit = 64;
+
+ if (!buf)
+ return -1;
+
+ if (len < 1 || len > i2c_packet_limit) {
+ printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n",
+ len, i2c_packet_limit);
+ return -1;
+ }
+
+ /* capture mutex */
+ if ((dev->caps.has_zl10353) && (dev->demod_addr << 1 == addr) && (reg % 2 == 0)) {
+ /*
+ * Workaround an I2C bug when reading from zl10353
+ */
+ reg -= 1;
+ len += 1;
+
+ rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, b, len);
+
+ *buf = b[1];
+ } else {
+ rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, buf, len);
+ }
+
+ /* release mutex */
+ return rc;
+}
+
+/*
+ * read from a 16bit register
+ * for example xc2028, xc3028 or xc3028L
+ */
+static int tm6000_i2c_recv_regs16(struct tm6000_core *dev, unsigned char addr,
+ __u16 reg, char *buf, int len)
+{
+ int rc;
+ unsigned char ureg;
+
+ if (!buf || len != 2)
+ return -1;
+
+ /* capture mutex */
+ if (dev->dev_type == TM6010) {
+ ureg = reg & 0xFF;
+ rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN,
+ addr | (reg & 0xFF00), 0, &ureg, 1);
+
+ if (rc < 0) {
+ /* release mutex */
+ return rc;
+ }
+
+ rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE, REQ_35_AFTEK_TUNER_READ,
+ reg, 0, buf, len);
+ } else {
+ rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE, REQ_14_SET_GET_I2C_WR2_RDN,
+ addr, reg, buf, len);
+ }
+
+ /* release mutex */
+ return rc;
+}
+
+static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap,
+ struct i2c_msg msgs[], int num)
+{
+ struct tm6000_core *dev = i2c_adap->algo_data;
+ int addr, rc, i, byte;
+
+ if (num <= 0)
+ return 0;
+ for (i = 0; i < num; i++) {
+ addr = (msgs[i].addr << 1) & 0xff;
+ i2c_dprintk(2, "%s %s addr=0x%x len=%d:",
+ (msgs[i].flags & I2C_M_RD) ? "read" : "write",
+ i == num - 1 ? "stop" : "nonstop", addr, msgs[i].len);
+ if (msgs[i].flags & I2C_M_RD) {
+ /* read request without preceding register selection */
+ /*
+ * The TM6000 only supports a read transaction
+ * immediately after a 1 or 2 byte write to select
+ * a register. We cannot fulfil this request.
+ */
+ i2c_dprintk(2, " read without preceding write not"
+ " supported");
+ rc = -EOPNOTSUPP;
+ goto err;
+ } else if (i + 1 < num && msgs[i].len <= 2 &&
+ (msgs[i + 1].flags & I2C_M_RD) &&
+ msgs[i].addr == msgs[i + 1].addr) {
+ /* 1 or 2 byte write followed by a read */
+ if (i2c_debug >= 2)
+ for (byte = 0; byte < msgs[i].len; byte++)
+ printk(KERN_CONT " %02x", msgs[i].buf[byte]);
+ i2c_dprintk(2, "; joined to read %s len=%d:",
+ i == num - 2 ? "stop" : "nonstop",
+ msgs[i + 1].len);
+
+ if (msgs[i].len == 2) {
+ rc = tm6000_i2c_recv_regs16(dev, addr,
+ msgs[i].buf[0] << 8 | msgs[i].buf[1],
+ msgs[i + 1].buf, msgs[i + 1].len);
+ } else {
+ rc = tm6000_i2c_recv_regs(dev, addr, msgs[i].buf[0],
+ msgs[i + 1].buf, msgs[i + 1].len);
+ }
+
+ i++;
+
+ if (addr == dev->tuner_addr << 1) {
+ tm6000_set_reg(dev, REQ_50_SET_START, 0, 0);
+ tm6000_set_reg(dev, REQ_51_SET_STOP, 0, 0);
+ }
+ if (i2c_debug >= 2)
+ for (byte = 0; byte < msgs[i].len; byte++)
+ printk(KERN_CONT " %02x", msgs[i].buf[byte]);
+ } else {
+ /* write bytes */
+ if (i2c_debug >= 2)
+ for (byte = 0; byte < msgs[i].len; byte++)
+ printk(KERN_CONT " %02x", msgs[i].buf[byte]);
+ rc = tm6000_i2c_send_regs(dev, addr, msgs[i].buf[0],
+ msgs[i].buf + 1, msgs[i].len - 1);
+ }
+ if (i2c_debug >= 2)
+ printk(KERN_CONT "\n");
+ if (rc < 0)
+ goto err;
+ }
+
+ return num;
+err:
+ i2c_dprintk(2, " ERROR: %i\n", rc);
+ return rc;
+}
+
+static int tm6000_i2c_eeprom(struct tm6000_core *dev)
+{
+ int i, rc;
+ unsigned char *p = dev->eedata;
+ unsigned char bytes[17];
+
+ dev->i2c_client.addr = 0xa0 >> 1;
+ dev->eedata_size = 0;
+
+ bytes[16] = '\0';
+ for (i = 0; i < sizeof(dev->eedata); ) {
+ *p = i;
+ rc = tm6000_i2c_recv_regs(dev, 0xa0, i, p, 1);
+ if (rc < 1) {
+ if (p == dev->eedata)
+ goto noeeprom;
+ else {
+ printk(KERN_WARNING
+ "%s: i2c eeprom read error (err=%d)\n",
+ dev->name, rc);
+ }
+ return -EINVAL;
+ }
+ dev->eedata_size++;
+ p++;
+ if (0 == (i % 16))
+ printk(KERN_INFO "%s: i2c eeprom %02x:", dev->name, i);
+ printk(KERN_CONT " %02x", dev->eedata[i]);
+ if ((dev->eedata[i] >= ' ') && (dev->eedata[i] <= 'z'))
+ bytes[i%16] = dev->eedata[i];
+ else
+ bytes[i%16] = '.';
+
+ i++;
+
+ if (0 == (i % 16)) {
+ bytes[16] = '\0';
+ printk(KERN_CONT " %s\n", bytes);
+ }
+ }
+ if (0 != (i%16)) {
+ bytes[i%16] = '\0';
+ for (i %= 16; i < 16; i++)
+ printk(KERN_CONT " ");
+ printk(KERN_CONT " %s\n", bytes);
+ }
+
+ return 0;
+
+noeeprom:
+ printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n",
+ dev->name, rc);
+ return -EINVAL;
+}
+
+/* ----------------------------------------------------------- */
+
+/*
+ * functionality()
+ */
+static u32 functionality(struct i2c_adapter *adap)
+{
+ return I2C_FUNC_SMBUS_EMUL;
+}
+
+static const struct i2c_algorithm tm6000_algo = {
+ .master_xfer = tm6000_i2c_xfer,
+ .functionality = functionality,
+};
+
+/* ----------------------------------------------------------- */
+
+/*
+ * tm6000_i2c_register()
+ * register i2c bus
+ */
+int tm6000_i2c_register(struct tm6000_core *dev)
+{
+ int rc;
+
+ dev->i2c_adap.owner = THIS_MODULE;
+ dev->i2c_adap.algo = &tm6000_algo;
+ dev->i2c_adap.dev.parent = &dev->udev->dev;
+ strlcpy(dev->i2c_adap.name, dev->name, sizeof(dev->i2c_adap.name));
+ dev->i2c_adap.algo_data = dev;
+ i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
+ rc = i2c_add_adapter(&dev->i2c_adap);
+ if (rc)
+ return rc;
+
+ dev->i2c_client.adapter = &dev->i2c_adap;
+ strlcpy(dev->i2c_client.name, "tm6000 internal", I2C_NAME_SIZE);
+ tm6000_i2c_eeprom(dev);
+
+ return 0;
+}
+
+/*
+ * tm6000_i2c_unregister()
+ * unregister i2c_bus
+ */
+int tm6000_i2c_unregister(struct tm6000_core *dev)
+{
+ i2c_del_adapter(&dev->i2c_adap);
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff