From ddd86436f4e3643c04b797f858dab95d5f2e4de9 Mon Sep 17 00:00:00 2001 From: root Date: Fri, 25 Dec 2015 15:00:15 +0000 Subject: fish --- drivers/media/usb/cx231xx/cx231xx-i2c.c | 532 ++++++++++++++++++++++++++++++++ 1 file changed, 532 insertions(+) create mode 100644 drivers/media/usb/cx231xx/cx231xx-i2c.c (limited to 'drivers/media/usb/cx231xx/cx231xx-i2c.c') diff --git a/drivers/media/usb/cx231xx/cx231xx-i2c.c b/drivers/media/usb/cx231xx/cx231xx-i2c.c new file mode 100644 index 0000000..96a5a09 --- /dev/null +++ b/drivers/media/usb/cx231xx/cx231xx-i2c.c @@ -0,0 +1,532 @@ +/* + cx231xx-i2c.c - driver for Conexant Cx23100/101/102 USB video capture devices + + Copyright (C) 2008 + Based on em28xx driver + Based on Cx23885 driver + + 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 +#include +#include +#include +#include +#include + +#include "cx231xx.h" + +/* ----------------------------------------------------------- */ + +static unsigned int i2c_scan; +module_param(i2c_scan, int, 0444); +MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time"); + +static unsigned int i2c_debug; +module_param(i2c_debug, int, 0644); +MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]"); + +#define dprintk1(lvl, fmt, args...) \ +do { \ + if (i2c_debug >= lvl) { \ + printk(fmt, ##args); \ + } \ +} while (0) + +#define dprintk2(lvl, fmt, args...) \ +do { \ + if (i2c_debug >= lvl) { \ + printk(KERN_DEBUG "%s at %s: " fmt, \ + dev->name, __func__ , ##args); \ + } \ +} while (0) + +static inline bool is_tuner(struct cx231xx *dev, struct cx231xx_i2c *bus, + const struct i2c_msg *msg, int tuner_type) +{ + if (bus->nr != dev->board.tuner_i2c_master) + return false; + + if (msg->addr != dev->board.tuner_addr) + return false; + + if (dev->tuner_type != tuner_type) + return false; + + return true; +} + +/* + * cx231xx_i2c_send_bytes() + */ +static int cx231xx_i2c_send_bytes(struct i2c_adapter *i2c_adap, + const struct i2c_msg *msg) +{ + struct cx231xx_i2c *bus = i2c_adap->algo_data; + struct cx231xx *dev = bus->dev; + struct cx231xx_i2c_xfer_data req_data; + int status = 0; + u16 size = 0; + u8 loop = 0; + u8 saddr_len = 1; + u8 *buf_ptr = NULL; + u16 saddr = 0; + u8 need_gpio = 0; + + if (is_tuner(dev, bus, msg, TUNER_XC5000)) { + size = msg->len; + + if (size == 2) { /* register write sub addr */ + /* Just writing sub address will cause problem + * to XC5000. So ignore the request */ + return 0; + } else if (size == 4) { /* register write with sub addr */ + if (msg->len >= 2) + saddr = msg->buf[0] << 8 | msg->buf[1]; + else if (msg->len == 1) + saddr = msg->buf[0]; + + switch (saddr) { + case 0x0000: /* start tuner calibration mode */ + need_gpio = 1; + /* FW Loading is done */ + dev->xc_fw_load_done = 1; + break; + case 0x000D: /* Set signal source */ + case 0x0001: /* Set TV standard - Video */ + case 0x0002: /* Set TV standard - Audio */ + case 0x0003: /* Set RF Frequency */ + need_gpio = 1; + break; + default: + if (dev->xc_fw_load_done) + need_gpio = 1; + break; + } + + if (need_gpio) { + dprintk1(1, + "GPIO WRITE: addr 0x%x, len %d, saddr 0x%x\n", + msg->addr, msg->len, saddr); + + return dev->cx231xx_gpio_i2c_write(dev, + msg->addr, + msg->buf, + msg->len); + } + } + + /* special case for Xc5000 tuner case */ + saddr_len = 1; + + /* adjust the length to correct length */ + size -= saddr_len; + buf_ptr = (u8 *) (msg->buf + 1); + + do { + /* prepare xfer_data struct */ + req_data.dev_addr = msg->addr; + req_data.direction = msg->flags; + req_data.saddr_len = saddr_len; + req_data.saddr_dat = msg->buf[0]; + req_data.buf_size = size > 16 ? 16 : size; + req_data.p_buffer = (u8 *) (buf_ptr + loop * 16); + + bus->i2c_nostop = (size > 16) ? 1 : 0; + bus->i2c_reserve = (loop == 0) ? 0 : 1; + + /* usb send command */ + status = dev->cx231xx_send_usb_command(bus, &req_data); + loop++; + + if (size >= 16) + size -= 16; + else + size = 0; + + } while (size > 0); + + bus->i2c_nostop = 0; + bus->i2c_reserve = 0; + + } else { /* regular case */ + + /* prepare xfer_data struct */ + req_data.dev_addr = msg->addr; + req_data.direction = msg->flags; + req_data.saddr_len = 0; + req_data.saddr_dat = 0; + req_data.buf_size = msg->len; + req_data.p_buffer = msg->buf; + + /* usb send command */ + status = dev->cx231xx_send_usb_command(bus, &req_data); + } + + return status < 0 ? status : 0; +} + +/* + * cx231xx_i2c_recv_bytes() + * read a byte from the i2c device + */ +static int cx231xx_i2c_recv_bytes(struct i2c_adapter *i2c_adap, + const struct i2c_msg *msg) +{ + struct cx231xx_i2c *bus = i2c_adap->algo_data; + struct cx231xx *dev = bus->dev; + struct cx231xx_i2c_xfer_data req_data; + int status = 0; + u16 saddr = 0; + u8 need_gpio = 0; + + if (is_tuner(dev, bus, msg, TUNER_XC5000)) { + if (msg->len == 2) + saddr = msg->buf[0] << 8 | msg->buf[1]; + else if (msg->len == 1) + saddr = msg->buf[0]; + + if (dev->xc_fw_load_done) { + + switch (saddr) { + case 0x0009: /* BUSY check */ + dprintk1(1, + "GPIO R E A D: Special case BUSY check \n"); + /*Try read BUSY register, just set it to zero*/ + msg->buf[0] = 0; + if (msg->len == 2) + msg->buf[1] = 0; + return 0; + case 0x0004: /* read Lock status */ + need_gpio = 1; + break; + + } + + if (need_gpio) { + /* this is a special case to handle Xceive tuner + clock stretch issue with gpio based I2C */ + + dprintk1(1, + "GPIO R E A D: addr 0x%x, len %d, saddr 0x%x\n", + msg->addr, msg->len, + msg->buf[0] << 8 | msg->buf[1]); + + status = + dev->cx231xx_gpio_i2c_write(dev, msg->addr, + msg->buf, + msg->len); + status = + dev->cx231xx_gpio_i2c_read(dev, msg->addr, + msg->buf, + msg->len); + return status; + } + } + + /* prepare xfer_data struct */ + req_data.dev_addr = msg->addr; + req_data.direction = msg->flags; + req_data.saddr_len = msg->len; + req_data.saddr_dat = msg->buf[0] << 8 | msg->buf[1]; + req_data.buf_size = msg->len; + req_data.p_buffer = msg->buf; + + /* usb send command */ + status = dev->cx231xx_send_usb_command(bus, &req_data); + + } else { + + /* prepare xfer_data struct */ + req_data.dev_addr = msg->addr; + req_data.direction = msg->flags; + req_data.saddr_len = 0; + req_data.saddr_dat = 0; + req_data.buf_size = msg->len; + req_data.p_buffer = msg->buf; + + /* usb send command */ + status = dev->cx231xx_send_usb_command(bus, &req_data); + } + + return status < 0 ? status : 0; +} + +/* + * cx231xx_i2c_recv_bytes_with_saddr() + * read a byte from the i2c device + */ +static int cx231xx_i2c_recv_bytes_with_saddr(struct i2c_adapter *i2c_adap, + const struct i2c_msg *msg1, + const struct i2c_msg *msg2) +{ + struct cx231xx_i2c *bus = i2c_adap->algo_data; + struct cx231xx *dev = bus->dev; + struct cx231xx_i2c_xfer_data req_data; + int status = 0; + u16 saddr = 0; + u8 need_gpio = 0; + + if (msg1->len == 2) + saddr = msg1->buf[0] << 8 | msg1->buf[1]; + else if (msg1->len == 1) + saddr = msg1->buf[0]; + + if (is_tuner(dev, bus, msg2, TUNER_XC5000)) { + if ((msg2->len < 16)) { + + dprintk1(1, + "i2c_read: addr 0x%x, len %d, saddr 0x%x, len %d\n", + msg2->addr, msg2->len, saddr, msg1->len); + + switch (saddr) { + case 0x0008: /* read FW load status */ + need_gpio = 1; + break; + case 0x0004: /* read Lock status */ + need_gpio = 1; + break; + } + + if (need_gpio) { + status = + dev->cx231xx_gpio_i2c_write(dev, msg1->addr, + msg1->buf, + msg1->len); + status = + dev->cx231xx_gpio_i2c_read(dev, msg2->addr, + msg2->buf, + msg2->len); + return status; + } + } + } + + /* prepare xfer_data struct */ + req_data.dev_addr = msg2->addr; + req_data.direction = msg2->flags; + req_data.saddr_len = msg1->len; + req_data.saddr_dat = saddr; + req_data.buf_size = msg2->len; + req_data.p_buffer = msg2->buf; + + /* usb send command */ + status = dev->cx231xx_send_usb_command(bus, &req_data); + + return status < 0 ? status : 0; +} + +/* + * cx231xx_i2c_check_for_device() + * check if there is a i2c_device at the supplied address + */ +static int cx231xx_i2c_check_for_device(struct i2c_adapter *i2c_adap, + const struct i2c_msg *msg) +{ + struct cx231xx_i2c *bus = i2c_adap->algo_data; + struct cx231xx *dev = bus->dev; + struct cx231xx_i2c_xfer_data req_data; + int status = 0; + + /* prepare xfer_data struct */ + req_data.dev_addr = msg->addr; + req_data.direction = msg->flags; + req_data.saddr_len = 0; + req_data.saddr_dat = 0; + req_data.buf_size = 0; + req_data.p_buffer = NULL; + + /* usb send command */ + status = dev->cx231xx_send_usb_command(bus, &req_data); + + return status < 0 ? status : 0; +} + +/* + * cx231xx_i2c_xfer() + * the main i2c transfer function + */ +static int cx231xx_i2c_xfer(struct i2c_adapter *i2c_adap, + struct i2c_msg msgs[], int num) +{ + struct cx231xx_i2c *bus = i2c_adap->algo_data; + struct cx231xx *dev = bus->dev; + int addr, rc, i, byte; + + if (num <= 0) + return 0; + mutex_lock(&dev->i2c_lock); + 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 */ + rc = cx231xx_i2c_check_for_device(i2c_adap, &msgs[i]); + if (rc < 0) { + dprintk2(2, " no device\n"); + mutex_unlock(&dev->i2c_lock); + return rc; + } + + } else if (msgs[i].flags & I2C_M_RD) { + /* read bytes */ + rc = cx231xx_i2c_recv_bytes(i2c_adap, &msgs[i]); + if (i2c_debug >= 2) { + for (byte = 0; byte < msgs[i].len; byte++) + printk(" %02x", msgs[i].buf[byte]); + } + } else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) && + msgs[i].addr == msgs[i + 1].addr + && (msgs[i].len <= 2) && (bus->nr < 3)) { + /* read bytes */ + rc = cx231xx_i2c_recv_bytes_with_saddr(i2c_adap, + &msgs[i], + &msgs[i + 1]); + if (i2c_debug >= 2) { + for (byte = 0; byte < msgs[i].len; byte++) + printk(" %02x", msgs[i].buf[byte]); + } + i++; + } else { + /* write bytes */ + if (i2c_debug >= 2) { + for (byte = 0; byte < msgs[i].len; byte++) + printk(" %02x", msgs[i].buf[byte]); + } + rc = cx231xx_i2c_send_bytes(i2c_adap, &msgs[i]); + } + if (rc < 0) + goto err; + if (i2c_debug >= 2) + printk("\n"); + } + mutex_unlock(&dev->i2c_lock); + return num; +err: + dprintk2(2, " ERROR: %i\n", rc); + mutex_unlock(&dev->i2c_lock); + return rc; +} + +/* ----------------------------------------------------------- */ + +/* + * functionality() + */ +static u32 functionality(struct i2c_adapter *adap) +{ + return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C; +} + +static struct i2c_algorithm cx231xx_algo = { + .master_xfer = cx231xx_i2c_xfer, + .functionality = functionality, +}; + +static struct i2c_adapter cx231xx_adap_template = { + .owner = THIS_MODULE, + .name = "cx231xx", + .algo = &cx231xx_algo, +}; + +static struct i2c_client cx231xx_client_template = { + .name = "cx231xx internal", +}; + +/* ----------------------------------------------------------- */ + +/* + * i2c_devs + * incomplete list of known devices + */ +static char *i2c_devs[128] = { + [0x60 >> 1] = "colibri", + [0x88 >> 1] = "hammerhead", + [0x8e >> 1] = "CIR", + [0x32 >> 1] = "GeminiIII", + [0x02 >> 1] = "Aquarius", + [0xa0 >> 1] = "eeprom", + [0xc0 >> 1] = "tuner", + [0xc2 >> 1] = "tuner", +}; + +/* + * cx231xx_do_i2c_scan() + * check i2c address range for devices + */ +void cx231xx_do_i2c_scan(struct cx231xx *dev, struct i2c_client *c) +{ + unsigned char buf; + int i, rc; + + cx231xx_info(": Checking for I2C devices ..\n"); + for (i = 0; i < 128; i++) { + c->addr = i; + rc = i2c_master_recv(c, &buf, 0); + if (rc < 0) + continue; + cx231xx_info("%s: i2c scan: found device @ 0x%x [%s]\n", + dev->name, i << 1, + i2c_devs[i] ? i2c_devs[i] : "???"); + } + cx231xx_info(": Completed Checking for I2C devices.\n"); +} + +/* + * cx231xx_i2c_register() + * register i2c bus + */ +int cx231xx_i2c_register(struct cx231xx_i2c *bus) +{ + struct cx231xx *dev = bus->dev; + + BUG_ON(!dev->cx231xx_send_usb_command); + + bus->i2c_adap = cx231xx_adap_template; + bus->i2c_client = cx231xx_client_template; + bus->i2c_adap.dev.parent = &dev->udev->dev; + + strlcpy(bus->i2c_adap.name, bus->dev->name, sizeof(bus->i2c_adap.name)); + + bus->i2c_adap.algo_data = bus; + i2c_set_adapdata(&bus->i2c_adap, &dev->v4l2_dev); + i2c_add_adapter(&bus->i2c_adap); + + bus->i2c_client.adapter = &bus->i2c_adap; + + if (0 == bus->i2c_rc) { + if (i2c_scan) + cx231xx_do_i2c_scan(dev, &bus->i2c_client); + } else + cx231xx_warn("%s: i2c bus %d register FAILED\n", + dev->name, bus->nr); + + return bus->i2c_rc; +} + +/* + * cx231xx_i2c_unregister() + * unregister i2c_bus + */ +int cx231xx_i2c_unregister(struct cx231xx_i2c *bus) +{ + i2c_del_adapter(&bus->i2c_adap); + return 0; +} -- cgit v1.2.3