2 * tm6000-i2c.c - driver for TM5600/TM6000/TM6010 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 /* ----------------------------------------------------------- */
37 static unsigned int i2c_debug;
38 module_param(i2c_debug, int, 0644);
39 MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
41 #define i2c_dprintk(lvl, fmt, args...) if (i2c_debug >= lvl) do { \
42 printk(KERN_DEBUG "%s at %s: " fmt, \
43 dev->name, __FUNCTION__ , ##args); } while (0)
45 static int tm6000_i2c_send_regs(struct tm6000_core *dev, unsigned char addr,
46 __u8 reg, char *buf, int len)
50 unsigned int i2c_packet_limit = 16;
52 if (dev->dev_type == TM6010)
53 i2c_packet_limit = 64;
58 if (len < 1 || len > i2c_packet_limit) {
59 printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n",
60 len, i2c_packet_limit);
65 rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
66 USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN,
67 addr | reg << 8, 0, buf, len);
74 /* Calculate delay time, 14000us for 64 bytes */
75 tsleep = ((len * 200) + 200 + 1000) / 1000;
82 /* Generic read - doesn't work fine with 16bit registers */
83 static int tm6000_i2c_recv_regs(struct tm6000_core *dev, unsigned char addr,
84 __u8 reg, char *buf, int len)
88 unsigned int i2c_packet_limit = 16;
90 if (dev->dev_type == TM6010)
91 i2c_packet_limit = 64;
96 if (len < 1 || len > i2c_packet_limit) {
97 printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n",
98 len, i2c_packet_limit);
103 if ((dev->caps.has_zl10353) && (dev->demod_addr << 1 == addr) && (reg % 2 == 0)) {
105 * Workaround an I2C bug when reading from zl10353
110 rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
111 REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, b, len);
115 rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
116 REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, buf, len);
124 * read from a 16bit register
125 * for example xc2028, xc3028 or xc3028L
127 static int tm6000_i2c_recv_regs16(struct tm6000_core *dev, unsigned char addr,
128 __u16 reg, char *buf, int len)
133 if (!buf || len != 2)
137 if (dev->dev_type == TM6010) {
139 rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
140 USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN,
141 addr | (reg & 0xFF00), 0, &ureg, 1);
149 rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
150 USB_RECIP_DEVICE, REQ_35_AFTEK_TUNER_READ,
153 rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
154 USB_RECIP_DEVICE, REQ_14_SET_GET_I2C_WR2_RDN,
155 addr, reg, buf, len);
162 static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap,
163 struct i2c_msg msgs[], int num)
165 struct tm6000_core *dev = i2c_adap->algo_data;
166 int addr, rc, i, byte;
170 for (i = 0; i < num; i++) {
171 addr = (msgs[i].addr << 1) & 0xff;
172 i2c_dprintk(2, "%s %s addr=0x%x len=%d:",
173 (msgs[i].flags & I2C_M_RD) ? "read" : "write",
174 i == num - 1 ? "stop" : "nonstop", addr, msgs[i].len);
175 if (msgs[i].flags & I2C_M_RD) {
176 /* read request without preceding register selection */
178 * The TM6000 only supports a read transaction
179 * immediately after a 1 or 2 byte write to select
180 * a register. We cannot fulfil this request.
182 i2c_dprintk(2, " read without preceding write not"
186 } else if (i + 1 < num && msgs[i].len <= 2 &&
187 (msgs[i + 1].flags & I2C_M_RD) &&
188 msgs[i].addr == msgs[i + 1].addr) {
189 /* 1 or 2 byte write followed by a read */
191 for (byte = 0; byte < msgs[i].len; byte++)
192 printk(" %02x", msgs[i].buf[byte]);
193 i2c_dprintk(2, "; joined to read %s len=%d:",
194 i == num - 2 ? "stop" : "nonstop",
197 if (msgs[i].len == 2) {
198 rc = tm6000_i2c_recv_regs16(dev, addr,
199 msgs[i].buf[0] << 8 | msgs[i].buf[1],
200 msgs[i + 1].buf, msgs[i + 1].len);
202 rc = tm6000_i2c_recv_regs(dev, addr, msgs[i].buf[0],
203 msgs[i + 1].buf, msgs[i + 1].len);
208 if (addr == dev->tuner_addr << 1) {
209 tm6000_set_reg(dev, REQ_50_SET_START, 0, 0);
210 tm6000_set_reg(dev, REQ_51_SET_STOP, 0, 0);
213 for (byte = 0; byte < msgs[i].len; byte++)
214 printk(" %02x", msgs[i].buf[byte]);
218 for (byte = 0; byte < msgs[i].len; byte++)
219 printk(" %02x", msgs[i].buf[byte]);
220 rc = tm6000_i2c_send_regs(dev, addr, msgs[i].buf[0],
221 msgs[i].buf + 1, msgs[i].len - 1);
223 if (addr == dev->tuner_addr << 1) {
224 tm6000_set_reg(dev, REQ_50_SET_START, 0, 0);
225 tm6000_set_reg(dev, REQ_51_SET_STOP, 0, 0);
236 i2c_dprintk(2, " ERROR: %i\n", rc);
240 static int tm6000_i2c_eeprom(struct tm6000_core *dev,
241 unsigned char *eedata, int len)
244 unsigned char *p = eedata;
245 unsigned char bytes[17];
247 dev->i2c_client.addr = 0xa0 >> 1;
250 for (i = 0; i < len; ) {
252 rc = tm6000_i2c_recv_regs(dev, 0xa0, i, p, 1);
258 "%s: i2c eeprom read error (err=%d)\n",
265 printk(KERN_INFO "%s: i2c eeprom %02x:", dev->name, i);
266 printk(" %02x", eedata[i]);
267 if ((eedata[i] >= ' ') && (eedata[i] <= 'z'))
268 bytes[i%16] = eedata[i];
276 printk(" %s\n", bytes);
281 for (i %= 16; i < 16; i++)
284 printk(" %s\n", bytes);
289 printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n",
294 /* ----------------------------------------------------------- */
299 static u32 functionality(struct i2c_adapter *adap)
301 return I2C_FUNC_SMBUS_EMUL;
304 #define mass_write(addr, reg, data...) \
305 { static const u8 _val[] = data; \
306 rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR, \
307 REQ_16_SET_GET_I2C_WR1_RDN, (reg<<8)+addr, 0x00, (u8 *) _val, \
310 printk(KERN_ERR "Error on line %d: %d\n", __LINE__, rc); \
316 static struct i2c_algorithm tm6000_algo = {
317 .master_xfer = tm6000_i2c_xfer,
318 .functionality = functionality,
321 static struct i2c_adapter tm6000_adap_template = {
322 .owner = THIS_MODULE,
324 .algo = &tm6000_algo,
327 static struct i2c_client tm6000_client_template = {
328 .name = "tm6000 internal",
331 /* ----------------------------------------------------------- */
334 * tm6000_i2c_register()
337 int tm6000_i2c_register(struct tm6000_core *dev)
339 unsigned char eedata[256];
341 dev->i2c_adap = tm6000_adap_template;
342 dev->i2c_adap.dev.parent = &dev->udev->dev;
343 strcpy(dev->i2c_adap.name, dev->name);
344 dev->i2c_adap.algo_data = dev;
345 i2c_add_adapter(&dev->i2c_adap);
347 dev->i2c_client = tm6000_client_template;
348 dev->i2c_client.adapter = &dev->i2c_adap;
350 i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
352 tm6000_i2c_eeprom(dev, eedata, sizeof(eedata));
358 * tm6000_i2c_unregister()
361 int tm6000_i2c_unregister(struct tm6000_core *dev)
363 i2c_del_adapter(&dev->i2c_adap);