[PATCH] v4l: 716: support for em28xx board family
- Added support for em28xx board family
Signed-off-by: Ludovico Cavedon <cavedon@sssup.it>
Signed-off-by: Markus Rechberger <mrechberger@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/media/video/em28xx/em28xx-i2c.c b/drivers/media/video/em28xx/em28xx-i2c.c
new file mode 100644
index 0000000..95f80a7
--- /dev/null
+++ b/drivers/media/video/em28xx/em28xx-i2c.c
@@ -0,0 +1,443 @@
+/*
+ em2820-i2c.c - driver for Empia EM2820/2840 USB video capture devices
+
+ Copyright (C) 2005 Markus Rechberger <mrechberger@gmail.com>
+ Ludovico Cavedon <cavedon@sssup.it>
+ Mauro Carvalho Chehab <mchehab@brturbo.com.br>
+
+ Based on the em2800 driver from Sascha Sommer <saschasommer@freenet.de>
+
+ 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/module.h>
+#include <linux/kernel.h>
+#include <linux/usb.h>
+#include <linux/i2c.h>
+#include <linux/videodev.h>
+#include <media/tuner.h>
+#include <linux/video_decoder.h>
+
+/* To be moved to compat.h */
+#if !defined(I2C_HW_B_EM2820)
+#define I2C_HW_B_EM2820 I2C_HW_B_BT848
+#endif
+
+#include "em2820.h"
+
+/* ----------------------------------------------------------- */
+
+static unsigned int i2c_scan = 0;
+module_param(i2c_scan, int, 0444);
+MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
+
+static unsigned int i2c_debug = 0;
+module_param(i2c_debug, int, 0644);
+MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
+
+#define dprintk(fmt, args...) if (i2c_debug) do {\
+ printk(KERN_DEBUG "%s: %s: " fmt "\n",\
+ dev->name, __FUNCTION__ , ##args); } while (0)
+#define dprintk1(fmt, args...) if (i2c_debug) do{ \
+ printk(KERN_DEBUG "%s: %s: " fmt, \
+ dev->name, __FUNCTION__ , ##args); } while (0)
+#define dprintk2(fmt, args...) if (i2c_debug) do {\
+ printk(fmt , ##args); } while (0)
+
+/*
+ * i2c_send_bytes()
+ * untested for more than 4 bytes
+ */
+static int i2c_send_bytes(void *data, unsigned char addr, char *buf, short len,
+ int stop)
+{
+ int wrcount = 0;
+ struct em2820 *dev = (struct em2820 *)data;
+
+ wrcount = dev->em2820_write_regs_req(dev, stop ? 2 : 3, addr, buf, len);
+
+ return wrcount;
+}
+
+/*
+ * i2c_recv_byte()
+ * read a byte from the i2c device
+ */
+static int i2c_recv_bytes(struct em2820 *dev, unsigned char addr, char *buf,
+ int len)
+{
+ int ret;
+ ret = dev->em2820_read_reg_req_len(dev, 2, addr, buf, len);
+ if (ret < 0) {
+ em2820_warn("reading i2c device failed (error=%i)\n", ret);
+ return ret;
+ }
+ if (dev->em2820_read_reg(dev, 0x5) != 0)
+ return -ENODEV;
+ return ret;
+}
+
+/*
+ * i2c_check_for_device()
+ * check if there is a i2c_device at the supplied address
+ */
+static int i2c_check_for_device(struct em2820 *dev, unsigned char addr)
+{
+ char msg;
+ int ret;
+ msg = addr;
+
+ ret = dev->em2820_read_reg_req(dev, 2, addr);
+ if (ret < 0) {
+ em2820_warn("reading from i2c device failed (error=%i)\n", ret);
+ return ret;
+ }
+ if (dev->em2820_read_reg(dev, 0x5) != 0)
+ return -ENODEV;
+ return 0;
+}
+
+/*
+ * em2820_i2c_xfer()
+ * the main i2c transfer function
+ */
+static int em2820_i2c_xfer(struct i2c_adapter *i2c_adap,
+ struct i2c_msg msgs[], int num)
+{
+ struct em2820 *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;
+ dprintk1("%s %s addr=%x len=%d:",
+ (msgs[i].flags & I2C_M_RD) ? "read" : "write",
+ i == num - 1 ? "stop" : "nonstop", addr, msgs[i].len);
+ if (!msgs[i].len) { /* no len: check only for device presence */
+ rc = i2c_check_for_device(dev, addr);
+ if (rc < 0) {
+ dprintk2(" no device\n");
+ return rc;
+ }
+
+ }
+ if (msgs[i].flags & I2C_M_RD) {
+ /* read bytes */
+
+ rc = i2c_recv_bytes(dev, addr, msgs[i].buf,
+ msgs[i].len);
+ if (i2c_debug) {
+ for (byte = 0; byte < msgs[i].len; byte++) {
+ printk(" %02x", msgs[i].buf[byte]);
+ }
+ }
+ } else {
+ /* write bytes */
+ if (i2c_debug) {
+ for (byte = 0; byte < msgs[i].len; byte++)
+ printk(" %02x", msgs[i].buf[byte]);
+ }
+ rc = i2c_send_bytes(dev, addr, msgs[i].buf, msgs[i].len,
+ i == num - 1);
+ if (rc < 0)
+ goto err;
+ }
+ if (i2c_debug)
+ printk("\n");
+ }
+
+ return num;
+ err:
+ dprintk2(" ERROR: %i\n", rc);
+ return rc;
+}
+
+static int em2820_i2c_eeprom(struct em2820 *dev, unsigned char *eedata, int len)
+{
+ unsigned char buf, *p = eedata;
+ struct em2820_eeprom *em_eeprom = (void *)eedata;
+ int i, err, size = len, block;
+
+ dev->i2c_client.addr = 0xa0 >> 1;
+ buf = 0;
+ if (1 != (err = i2c_master_send(&dev->i2c_client, &buf, 1))) {
+ printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n",
+ dev->name, err);
+ return -1;
+ }
+ while (size > 0) {
+ if (size > 16)
+ block = 16;
+ else
+ block = size;
+
+ if (block !=
+ (err = i2c_master_recv(&dev->i2c_client, p, block))) {
+ printk(KERN_WARNING
+ "%s: i2c eeprom read error (err=%d)\n",
+ dev->name, err);
+ return -1;
+ }
+ size -= block;
+ p += block;
+ }
+ for (i = 0; i < len; i++) {
+ if (0 == (i % 16))
+ printk(KERN_INFO "%s: i2c eeprom %02x:", dev->name, i);
+ printk(" %02x", eedata[i]);
+ if (15 == (i % 16))
+ printk("\n");
+ }
+
+ printk(KERN_INFO "EEPROM ID= 0x%08x\n", em_eeprom->id);
+ printk(KERN_INFO "Vendor/Product ID= %04x:%04x\n", em_eeprom->vendor_ID,
+ em_eeprom->product_ID);
+
+ switch (em_eeprom->chip_conf >> 4 & 0x3) {
+ case 0:
+ printk(KERN_INFO "No audio on board.\n");
+ break;
+ case 1:
+ printk(KERN_INFO "AC97 audio (5 sample rates)\n");
+ break;
+ case 2:
+ printk(KERN_INFO "I2S audio, sample rate=32k\n");
+ break;
+ case 3:
+ printk(KERN_INFO "I2S audio, 3 sample rates\n");
+ break;
+ }
+
+ if (em_eeprom->chip_conf & 1 << 3)
+ printk(KERN_INFO "USB Remote wakeup capable\n");
+
+ if (em_eeprom->chip_conf & 1 << 2)
+ printk(KERN_INFO "USB Self power capable\n");
+
+ switch (em_eeprom->chip_conf & 0x3) {
+ case 0:
+ printk(KERN_INFO "500mA max power\n");
+ break;
+ case 1:
+ printk(KERN_INFO "400mA max power\n");
+ break;
+ case 2:
+ printk(KERN_INFO "300mA max power\n");
+ break;
+ case 3:
+ printk(KERN_INFO "200mA max power\n");
+ break;
+ }
+
+ return 0;
+}
+
+/* ----------------------------------------------------------- */
+
+/*
+ * algo_control()
+ */
+static int algo_control(struct i2c_adapter *adapter,
+ unsigned int cmd, unsigned long arg)
+{
+ return 0;
+}
+
+/*
+ * functionality()
+ */
+static u32 functionality(struct i2c_adapter *adap)
+{
+ return I2C_FUNC_SMBUS_EMUL;
+}
+
+#ifndef I2C_PEC
+static void inc_use(struct i2c_adapter *adap)
+{
+ MOD_INC_USE_COUNT;
+}
+
+static void dec_use(struct i2c_adapter *adap)
+{
+ MOD_DEC_USE_COUNT;
+}
+#endif
+
+static int em2820_set_tuner(int check_eeprom, struct i2c_client *client)
+{
+ struct em2820 *dev = client->adapter->algo_data;
+
+ struct tuner_setup tun_setup;
+
+ /* tuner */
+ if (dev->has_tuner) {
+ tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
+ tun_setup.type = dev->tuner_type;
+ tun_setup.addr = dev->tuner_addr;
+
+ em2820_i2c_call_clients(dev, TUNER_SET_TYPE_ADDR, &tun_setup);
+ }
+ return (0);
+}
+
+/*
+ * attach_inform()
+ * gets called when a device attaches to the i2c bus
+ * does some basic configuration
+ */
+static int attach_inform(struct i2c_client *client)
+{
+ struct em2820 *dev = client->adapter->algo_data;
+
+ dprintk("address %x", client->addr << 1);
+ switch (client->addr << 1) {
+ case 0x68:
+ em2820_i2c_call_clients(dev, TDA9887_SET_CONFIG, &dev->tda9887_conf);
+ break;
+ case 0x4a:
+ dprintk1("attach_inform: saa7113 detected.\n");
+ break;
+ case 0xa0:
+ dprintk1("attach_inform: eeprom detected.\n");
+ break;
+ case 0x80:
+ case 0x88:
+ dprintk1("attach_inform: msp34xx detected.\n");
+ break;
+ case 0xb8:
+ case 0xba:
+ dprintk1("attach_inform: tvp5150 detected.\n");
+ break;
+ default:
+ dev->tuner_addr = client->addr;
+ em2820_set_tuner(-1, client);
+ }
+
+ return 0;
+}
+
+static struct i2c_algorithm em2820_algo = {
+ .name = "em2820",
+ .id = I2C_HW_B_EM2820,
+ .master_xfer = em2820_i2c_xfer,
+ .algo_control = algo_control,
+ .functionality = functionality,
+};
+
+static struct i2c_adapter em2820_adap_template = {
+#ifdef I2C_PEC
+ .owner = THIS_MODULE,
+#else
+ .inc_use = inc_use,
+ .dec_use = dec_use,
+#endif
+#ifdef I2C_CLASS_TV_ANALOG
+ .class = I2C_CLASS_TV_ANALOG,
+#endif
+ .name = "em2820",
+ .id = I2C_HW_B_EM2820,
+ .algo = &em2820_algo,
+ .client_register = attach_inform,
+};
+
+static struct i2c_client em2820_client_template = {
+ .name = "em2820 internal",
+ .flags = I2C_CLIENT_ALLOW_USE,
+};
+
+/* ----------------------------------------------------------- */
+
+/*
+ * i2c_devs
+ * incomplete list of known devices
+ */
+static char *i2c_devs[128] = {
+ [0x4a >> 1] = "saa7113h",
+ [0x60 >> 1] = "remote IR sensor",
+ [0x86 >> 1] = "tda9887",
+ [0x80 >> 1] = "msp34xx",
+ [0x88 >> 1] = "msp34xx",
+ [0xa0 >> 1] = "eeprom",
+ [0xb8 >> 1] = "tvp5150a",
+ [0xba >> 1] = "tvp5150a",
+ [0xc0 >> 1] = "tuner (analog)",
+ [0xc2 >> 1] = "tuner (analog)",
+ [0xc4 >> 1] = "tuner (analog)",
+ [0xc6 >> 1] = "tuner (analog)",
+};
+
+/*
+ * do_i2c_scan()
+ * check i2c address range for devices
+ */
+static void do_i2c_scan(char *name, struct i2c_client *c)
+{
+ unsigned char buf;
+ int i, rc;
+
+ for (i = 0; i < 128; i++) {
+ c->addr = i;
+ rc = i2c_master_recv(c, &buf, 0);
+ if (rc < 0)
+ continue;
+ printk(KERN_INFO "%s: found device @ 0x%x [%s]", name,
+ i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
+ }
+}
+
+/*
+ * em2820_i2c_call_clients()
+ * send commands to all attached i2c devices
+ */
+void em2820_i2c_call_clients(struct em2820 *dev, unsigned int cmd, void *arg)
+{
+ BUG_ON(NULL == dev->i2c_adap.algo_data);
+ i2c_clients_command(&dev->i2c_adap, cmd, arg);
+}
+
+/*
+ * em2820_i2c_register()
+ * register i2c bus
+ */
+int em2820_i2c_register(struct em2820 *dev)
+{
+ BUG_ON(!dev->em2820_write_regs || !dev->em2820_read_reg);
+ BUG_ON(!dev->em2820_write_regs_req || !dev->em2820_read_reg_req);
+ dev->i2c_adap = em2820_adap_template;
+ dev->i2c_adap.dev.parent = &dev->udev->dev;
+ strcpy(dev->i2c_adap.name, dev->name);
+ dev->i2c_adap.algo_data = dev;
+ i2c_add_adapter(&dev->i2c_adap);
+
+ dev->i2c_client = em2820_client_template;
+ dev->i2c_client.adapter = &dev->i2c_adap;
+
+ em2820_i2c_eeprom(dev, dev->eedata, sizeof(dev->eedata));
+
+ if (i2c_scan)
+ do_i2c_scan(dev->name, &dev->i2c_client);
+ return 0;
+}
+
+/*
+ * em2820_i2c_unregister()
+ * unregister i2c_bus
+ */
+int em2820_i2c_unregister(struct em2820 *dev)
+{
+ i2c_del_adapter(&dev->i2c_adap);
+ return 0;
+}