2 tm6000-i2c.c - driver for TM5600/TM6000 USB video capture devices
4 Copyright (C) 2006-2007 Mauro Carvalho Chehab <mchehab@infradead.org>
6 Copyright (C) 2007 Michel Ludwig <michel.ludwig@gmail.com>
7 - Fix SMBus Read Byte command
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation version 2
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include <linux/module.h>
24 #include <linux/kernel.h>
25 #include <linux/usb.h>
26 #include <linux/i2c.h>
29 #include "tm6000-regs.h"
30 #include <media/v4l2-common.h>
31 #include <media/tuner.h>
32 #include "tuner-xc2028.h"
35 /*FIXME: Hack to avoid needing to patch i2c-id.h */
36 #define I2C_HW_B_TM6000 I2C_HW_B_EM28XX
37 /* ----------------------------------------------------------- */
39 static unsigned int i2c_scan = 0;
40 module_param(i2c_scan, int, 0444);
41 MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
43 static unsigned int i2c_debug = 0;
44 module_param(i2c_debug, int, 0644);
45 MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
47 #define i2c_dprintk(lvl,fmt, args...) if (i2c_debug>=lvl) do{ \
48 printk(KERN_DEBUG "%s at %s: " fmt, \
49 dev->name, __FUNCTION__ , ##args); } while (0)
52 /* Returns 0 if address is found */
53 static int tm6000_i2c_scan(struct i2c_adapter *i2c_adap, int addr)
55 struct tm6000_core *dev = i2c_adap->algo_data;
58 /* HACK: i2c scan is not working yet */
60 (dev->caps.has_tuner && (addr==dev->tuner_addr)) ||
61 (dev->caps.has_tda9874 && (addr==0xb0)) ||
62 (dev->caps.has_eeprom && (addr==0xa0))
64 printk("Hack: enabling device at addr 0x%02x\n",addr);
73 /* This sends addr + 1 byte with 0 */
74 rc = tm6000_read_write_usb (dev,
75 USB_DIR_IN | USB_TYPE_VENDOR,
76 REQ_16_SET_GET_I2C_WR1_RDN,
83 printk("no device at addr 0x%02x\n",addr);
86 printk("Hack: check on addr 0x%02x returned %d\n",addr,rc);
92 static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap,
93 struct i2c_msg msgs[], int num)
95 struct tm6000_core *dev = i2c_adap->algo_data;
96 int addr, rc, i, byte;
100 for (i = 0; i < num; i++) {
101 addr = (msgs[i].addr << 1) & 0xff;
102 i2c_dprintk(2,"%s %s addr=0x%x len=%d:",
103 (msgs[i].flags & I2C_M_RD) ? "read" : "write",
104 i == num - 1 ? "stop" : "nonstop", addr, msgs[i].len);
107 rc = tm6000_i2c_scan(i2c_adap, addr);
108 } else if (msgs[i].flags & I2C_M_RD) {
109 /* read request without preceding register selection */
111 * The TM6000 only supports a read transaction
112 * immediately after a 1 or 2 byte write to select
113 * a register. We cannot fulfil this request.
115 i2c_dprintk(2, " read without preceding write not"
119 } else if (i + 1 < num && msgs[i].len <= 2 &&
120 (msgs[i + 1].flags & I2C_M_RD) &&
121 msgs[i].addr == msgs[i + 1].addr) {
122 /* 1 or 2 byte write followed by a read */
124 for (byte = 0; byte < msgs[i].len; byte++)
125 printk(" %02x", msgs[i].buf[byte]);
126 i2c_dprintk(2, "; joined to read %s len=%d:",
127 i == num - 2 ? "stop" : "nonstop",
129 rc = tm6000_read_write_usb (dev,
130 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
131 msgs[i].len == 1 ? REQ_16_SET_GET_I2C_WR1_RDN
132 : REQ_14_SET_GET_I2C_WR2_RDN,
133 addr | msgs[i].buf[0] << 8,
134 msgs[i].len == 1 ? 0 : msgs[i].buf[1],
135 msgs[i + 1].buf, msgs[i + 1].len);
138 for (byte = 0; byte < msgs[i].len; byte++)
139 printk(" %02x", msgs[i].buf[byte]);
143 for (byte = 0; byte < msgs[i].len; byte++)
144 printk(" %02x", msgs[i].buf[byte]);
145 rc = tm6000_read_write_usb(dev,
146 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
147 REQ_16_SET_GET_I2C_WR1_RDN,
148 addr | msgs[i].buf[0] << 8, 0,
149 msgs[i].buf + 1, msgs[i].len - 1);
159 i2c_dprintk(2," ERROR: %i\n", rc);
163 static int tm6000_i2c_eeprom(struct tm6000_core *dev,
164 unsigned char *eedata, int len)
167 unsigned char *p = eedata;
168 unsigned char bytes[17];
170 dev->i2c_client.addr = 0xa0 >> 1;
173 for (i = 0; i < len; ) {
175 rc = tm6000_read_write_usb (dev,
176 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
177 REQ_16_SET_GET_I2C_WR1_RDN, 0xa0 | i<<8, 0, p, 1);
183 "%s: i2c eeprom read error (err=%d)\n",
190 printk(KERN_INFO "%s: i2c eeprom %02x:", dev->name, i);
191 printk(" %02x", eedata[i]);
192 if ((eedata[i] >= ' ') && (eedata[i] <= 'z')) {
193 bytes[i%16] = eedata[i];
202 printk(" %s\n", bytes);
207 for (i %= 16; i < 16; i++)
210 printk(" %s\n", bytes);
215 printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n",
220 /* ----------------------------------------------------------- */
225 static int algo_control(struct i2c_adapter *adapter,
226 unsigned int cmd, unsigned long arg)
234 static u32 functionality(struct i2c_adapter *adap)
236 return I2C_FUNC_SMBUS_EMUL;
240 static void inc_use(struct i2c_adapter *adap)
245 static void dec_use(struct i2c_adapter *adap)
251 #define mass_write(addr, reg, data...) \
252 { const static u8 _val[] = data; \
253 rc=tm6000_read_write_usb(dev,USB_DIR_OUT | USB_TYPE_VENDOR, \
254 REQ_16_SET_GET_I2C_WR1_RDN,(reg<<8)+addr, 0x00, (u8 *) _val, \
257 printk(KERN_ERR "Error on line %d: %d\n",__LINE__,rc); \
263 /* Tuner callback to provide the proper gpio changes needed for xc2028 */
265 static int tm6000_tuner_callback(void *ptr, int command, int arg)
268 struct tm6000_core *dev = ptr;
270 if (dev->tuner_type!=TUNER_XC2028)
274 case XC2028_RESET_CLK:
275 tm6000_set_reg (dev, REQ_04_EN_DISABLE_MCU_INT,
278 rc=tm6000_set_reg (dev, REQ_03_SET_GET_MCU_PIN,
283 rc=tm6000_set_reg (dev, REQ_03_SET_GET_MCU_PIN,
286 case XC2028_TUNER_RESET:
287 /* Reset codes during load firmware */
290 tm6000_set_reg (dev, REQ_03_SET_GET_MCU_PIN,
291 dev->tuner_reset_gpio, 0x00);
293 tm6000_set_reg (dev, REQ_03_SET_GET_MCU_PIN,
294 dev->tuner_reset_gpio, 0x01);
298 tm6000_set_reg (dev, REQ_04_EN_DISABLE_MCU_INT,
304 rc=tm6000_set_reg (dev, REQ_03_SET_GET_MCU_PIN,
309 rc=tm6000_set_reg (dev, REQ_03_SET_GET_MCU_PIN,
318 static int attach_inform(struct i2c_client *client)
320 struct tm6000_core *dev = client->adapter->algo_data;
321 struct tuner_setup tun_setup;
323 i2c_dprintk(1, "%s i2c attach [addr=0x%x,client=%s]\n",
324 client->driver->driver.name, client->addr, client->name);
326 switch (client->addr<<1) {
328 request_module("tvaudio");
332 /* If tuner, initialize the tuner part */
333 if ( dev->tuner_addr != client->addr<<1 ) {
337 memset (&tun_setup, 0, sizeof(tun_setup));
339 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
340 tun_setup.type = dev->tuner_type;
341 tun_setup.addr = dev->tuner_addr>>1;
342 tun_setup.tuner_callback = tm6000_tuner_callback;
344 client->driver->command (client,TUNER_SET_TYPE_ADDR, &tun_setup);
349 static struct i2c_algorithm tm6000_algo = {
350 .master_xfer = tm6000_i2c_xfer,
351 .algo_control = algo_control,
352 .functionality = functionality,
355 static struct i2c_adapter tm6000_adap_template = {
357 .owner = THIS_MODULE,
362 .class = I2C_CLASS_TV_ANALOG,
364 .id = I2C_HW_B_TM6000,
365 .algo = &tm6000_algo,
366 .client_register = attach_inform,
369 static struct i2c_client tm6000_client_template = {
370 .name = "tm6000 internal",
373 /* ----------------------------------------------------------- */
377 * incomplete list of known devices
379 static char *i2c_devs[128] = {
380 [0xc2 >> 1] = "tuner (analog)",
385 * check i2c address range for devices
387 static void do_i2c_scan(char *name, struct i2c_client *c)
392 for (i = 0; i < 128; i++) {
394 rc = i2c_master_recv(c, &buf, 0);
397 printk(KERN_INFO "%s: found i2c device @ 0x%x [%s]\n", name,
398 i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
403 * tm6000_i2c_call_clients()
404 * send commands to all attached i2c devices
406 void tm6000_i2c_call_clients(struct tm6000_core *dev, unsigned int cmd, void *arg)
408 BUG_ON(NULL == dev->i2c_adap.algo_data);
409 i2c_clients_command(&dev->i2c_adap, cmd, arg);
413 * tm6000_i2c_register()
416 int tm6000_i2c_register(struct tm6000_core *dev)
418 unsigned char eedata[256];
420 dev->i2c_adap = tm6000_adap_template;
421 dev->i2c_adap.dev.parent = &dev->udev->dev;
422 strcpy(dev->i2c_adap.name, dev->name);
423 dev->i2c_adap.algo_data = dev;
424 i2c_add_adapter(&dev->i2c_adap);
426 dev->i2c_client = tm6000_client_template;
427 dev->i2c_client.adapter = &dev->i2c_adap;
430 do_i2c_scan(dev->name, &dev->i2c_client);
432 tm6000_i2c_eeprom(dev, eedata, sizeof(eedata));
438 * tm6000_i2c_unregister()
441 int tm6000_i2c_unregister(struct tm6000_core *dev)
443 i2c_del_adapter(&dev->i2c_adap);