summaryrefslogtreecommitdiff
path: root/linux/drivers/usb/media/em2820-i2c.c
diff options
context:
space:
mode:
Diffstat (limited to 'linux/drivers/usb/media/em2820-i2c.c')
-rw-r--r--linux/drivers/usb/media/em2820-i2c.c587
1 files changed, 0 insertions, 587 deletions
diff --git a/linux/drivers/usb/media/em2820-i2c.c b/linux/drivers/usb/media/em2820-i2c.c
deleted file mode 100644
index 5f42bb961..000000000
--- a/linux/drivers/usb/media/em2820-i2c.c
+++ /dev/null
@@ -1,587 +0,0 @@
-/*
- em2820-i2c.c - driver for Empia EM2800/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/video_decoder.h>
-
-#include "em2820.h"
-#include <media/tuner.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 dprintk1(lvl,fmt, args...) if (i2c_debug>=lvl) do {\
- printk(fmt, ##args); } while (0)
-#define dprintk2(lvl,fmt, args...) if (i2c_debug>=lvl) do{ \
- printk(KERN_DEBUG "%s at %s: " fmt, \
- dev->name, __FUNCTION__, ##args); } while (0)
-
-/*
- * em2800_i2c_send_max4()
- * send up to 4 bytes to the i2c device
- */
-static int em2800_i2c_send_max4(struct em2820 *dev, unsigned char addr,
- char *buf, int len)
-{
- int ret;
- int write_timeout;
- unsigned char b2[6];
- BUG_ON(len < 1 || len > 4);
- b2[5] = 0x80 + len - 1;
- b2[4] = addr;
- b2[3] = buf[0];
- if (len > 1)
- b2[2] = buf[1];
- if (len > 2)
- b2[1] = buf[2];
- if (len > 3)
- b2[0] = buf[3];
-
- ret = dev->em2820_write_regs(dev, 4 - len, &b2[4 - len], 2 + len);
- if (ret != 2 + len) {
- em2820_warn("writting to i2c device failed (error=%i)\n", ret);
- return -EIO;
- }
- for (write_timeout = EM2800_I2C_WRITE_TIMEOUT; write_timeout > 0;
- write_timeout -= 5) {
- ret = dev->em2820_read_reg(dev, 0x05);
- if (ret == 0x80 + len - 1)
- return len;
- mdelay(5);
- }
- em2820_warn("i2c write timed out\n");
- return -EIO;
-}
-
-/*
- * em2800_i2c_send_bytes()
- */
-static int em2800_i2c_send_bytes(void *data, unsigned char addr, char *buf,
- short len)
-{
- char *bufPtr = buf;
- int ret;
- int wrcount = 0;
- int count;
- int maxLen = 4;
- struct em2820 *dev = (struct em2820 *)data;
- while (len > 0) {
- count = (len > maxLen) ? maxLen : len;
- ret = em2800_i2c_send_max4(dev, addr, bufPtr, count);
- if (ret > 0) {
- len -= count;
- bufPtr += count;
- wrcount += count;
- } else
- return (ret < 0) ? ret : -EFAULT;
- }
- return wrcount;
-}
-
-/*
- * em2800_i2c_check_for_device()
- * check if there is a i2c_device at the supplied address
- */
-static int em2800_i2c_check_for_device(struct em2820 *dev, unsigned char addr)
-{
- char msg;
- int ret;
- int write_timeout;
- msg = addr;
- ret = dev->em2820_write_regs(dev, 0x04, &msg, 1);
- if (ret < 0) {
- em2820_warn("setting i2c device address failed (error=%i)\n",
- ret);
- return ret;
- }
- msg = 0x84;
- ret = dev->em2820_write_regs(dev, 0x05, &msg, 1);
- if (ret < 0) {
- em2820_warn("preparing i2c read failed (error=%i)\n", ret);
- return ret;
- }
- for (write_timeout = EM2800_I2C_WRITE_TIMEOUT; write_timeout > 0;
- write_timeout -= 5) {
- unsigned msg = dev->em2820_read_reg(dev, 0x5);
- if (msg == 0x94)
- return -ENODEV;
- else if (msg == 0x84)
- return 0;
- mdelay(5);
- }
- return -ENODEV;
-}
-
-/*
- * em2800_i2c_recv_bytes()
- * read from the i2c device
- */
-static int em2800_i2c_recv_bytes(struct em2820 *dev, unsigned char addr,
- char *buf, int len)
-{
- int ret;
- /* check for the device and set i2c read address */
- ret = em2800_i2c_check_for_device(dev, addr);
- if (ret) {
- em2820_warn
- ("preparing read at i2c address 0x%x failed (error=%i)\n",
- addr, ret);
- return ret;
- }
- ret = dev->em2820_read_reg_req_len(dev, 0x0, 0x3, buf, len);
- if (ret < 0) {
- em2820_warn("reading from i2c device at 0x%x failed (error=%i)",
- addr, ret);
- return ret;
- }
- return ret;
-}
-
-/*
- * em2820_i2c_send_bytes()
- * untested for more than 4 bytes
- */
-static int em2820_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;
-}
-
-/*
- * em2820_i2c_recv_bytes()
- * read a byte from the i2c device
- */
-static int em2820_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;
-}
-
-/*
- * em2820_i2c_check_for_device()
- * check if there is a i2c_device at the supplied address
- */
-static int em2820_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;
- dprintk2(2,"%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 */
- if (dev->is_em2800)
- rc = em2800_i2c_check_for_device(dev, addr);
- else
- rc = em2820_i2c_check_for_device(dev, addr);
- if (rc < 0) {
- dprintk2(2," no device\n");
- return rc;
- }
-
- } else if (msgs[i].flags & I2C_M_RD) {
- /* read bytes */
- if (dev->is_em2800)
- rc = em2800_i2c_recv_bytes(dev, addr,
- msgs[i].buf,
- msgs[i].len);
- else
- rc = em2820_i2c_recv_bytes(dev, addr,
- msgs[i].buf,
- msgs[i].len);
- if (i2c_debug>=2) {
- for (byte = 0; byte < msgs[i].len; byte++) {
- printk(" %02x", msgs[i].buf[byte]);
- }
- }
- } else {
- /* write bytes */
- if (i2c_debug>=2) {
- for (byte = 0; byte < msgs[i].len; byte++)
- printk(" %02x", msgs[i].buf[byte]);
- }
- if (dev->is_em2800)
- rc = em2800_i2c_send_bytes(dev, addr,
- msgs[i].buf,
- msgs[i].len);
- else
- rc = em2820_i2c_send_bytes(dev, addr,
- msgs[i].buf,
- msgs[i].len,
- i == num - 1);
- if (rc < 0)
- goto err;
- }
- if (i2c_debug>=2)
- printk("\n");
- }
-
- return num;
- err:
- dprintk2(2," 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;
-
- /* Check if board has eeprom */
- err = i2c_master_recv(&dev->i2c_client, &buf, 0);
- if (err < 0)
- return -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;
- }
- printk(KERN_INFO "Table at 0x%02x, strings=0x%04x, 0x%04x, 0x%04x\n",
- em_eeprom->string_idx_table,em_eeprom->string1,
- em_eeprom->string2,em_eeprom->string3);
-
- 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;
-
- 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;
-
- switch (client->addr << 1) {
- case 0x86:
- em2820_i2c_call_clients(dev, TDA9887_SET_CONFIG, &dev->tda9887_conf);
- break;
- case 0x42:
- dprintk1(1,"attach_inform: saa7114 detected.\n");
- break;
- case 0x4a:
- dprintk1(1,"attach_inform: saa7113 detected.\n");
- break;
- case 0xa0:
- dprintk1(1,"attach_inform: eeprom detected.\n");
- break;
- case 0x60:
- case 0x8e:
- {
- struct IR_i2c *ir = i2c_get_clientdata(client);
- dprintk1(1,"attach_inform: IR detected (%s).\n",ir->phys);
- em2820_set_ir(dev,ir);
- break;
- }
- case 0x80:
- case 0x88:
- dprintk1(1,"attach_inform: msp34xx detected.\n");
- break;
- case 0xb8:
- case 0xba:
- dprintk1(1,"attach_inform: tvp5150 detected.\n");
- break;
- default:
- dprintk1(1,"attach inform: detected I2C address %x\n", client->addr << 1);
- dev->tuner_addr = client->addr;
- em2820_set_tuner(-1, client);
- }
-
- return 0;
-}
-
-static struct i2c_algorithm em2820_algo = {
- .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",
- [0x8e >> 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 i2c device @ 0x%x [%s]\n", 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;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-13 20:22:32 +0000