| /* |
| * |
| * |
| * Copyright (C) 2005 Mike Isely <isely@pobox.com> |
| * |
| * 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 |
| * |
| * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| */ |
| |
| #include <linux/i2c.h> |
| #include <media/ir-kbd-i2c.h> |
| #include "pvrusb2-i2c-core.h" |
| #include "pvrusb2-hdw-internal.h" |
| #include "pvrusb2-debug.h" |
| #include "pvrusb2-fx2-cmd.h" |
| #include "pvrusb2.h" |
| |
| #define trace_i2c(...) pvr2_trace(PVR2_TRACE_I2C,__VA_ARGS__) |
| |
| /* |
| |
| This module attempts to implement a compliant I2C adapter for the pvrusb2 |
| device. |
| |
| */ |
| |
| static unsigned int i2c_scan; |
| module_param(i2c_scan, int, S_IRUGO|S_IWUSR); |
| MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time"); |
| |
| static int ir_mode[PVR_NUM] = { [0 ... PVR_NUM-1] = 1 }; |
| module_param_array(ir_mode, int, NULL, 0444); |
| MODULE_PARM_DESC(ir_mode,"specify: 0=disable IR reception, 1=normal IR"); |
| |
| static int pvr2_disable_ir_video; |
| module_param_named(disable_autoload_ir_video, pvr2_disable_ir_video, |
| int, S_IRUGO|S_IWUSR); |
| MODULE_PARM_DESC(disable_autoload_ir_video, |
| "1=do not try to autoload ir_video IR receiver"); |
| |
| static int pvr2_i2c_write(struct pvr2_hdw *hdw, /* Context */ |
| u8 i2c_addr, /* I2C address we're talking to */ |
| u8 *data, /* Data to write */ |
| u16 length) /* Size of data to write */ |
| { |
| /* Return value - default 0 means success */ |
| int ret; |
| |
| |
| if (!data) length = 0; |
| if (length > (sizeof(hdw->cmd_buffer) - 3)) { |
| pvr2_trace(PVR2_TRACE_ERROR_LEGS, |
| "Killing an I2C write to %u that is too large" |
| " (desired=%u limit=%u)", |
| i2c_addr, |
| length,(unsigned int)(sizeof(hdw->cmd_buffer) - 3)); |
| return -ENOTSUPP; |
| } |
| |
| LOCK_TAKE(hdw->ctl_lock); |
| |
| /* Clear the command buffer (likely to be paranoia) */ |
| memset(hdw->cmd_buffer, 0, sizeof(hdw->cmd_buffer)); |
| |
| /* Set up command buffer for an I2C write */ |
| hdw->cmd_buffer[0] = FX2CMD_I2C_WRITE; /* write prefix */ |
| hdw->cmd_buffer[1] = i2c_addr; /* i2c addr of chip */ |
| hdw->cmd_buffer[2] = length; /* length of what follows */ |
| if (length) memcpy(hdw->cmd_buffer + 3, data, length); |
| |
| /* Do the operation */ |
| ret = pvr2_send_request(hdw, |
| hdw->cmd_buffer, |
| length + 3, |
| hdw->cmd_buffer, |
| 1); |
| if (!ret) { |
| if (hdw->cmd_buffer[0] != 8) { |
| ret = -EIO; |
| if (hdw->cmd_buffer[0] != 7) { |
| trace_i2c("unexpected status" |
| " from i2_write[%d]: %d", |
| i2c_addr,hdw->cmd_buffer[0]); |
| } |
| } |
| } |
| |
| LOCK_GIVE(hdw->ctl_lock); |
| |
| return ret; |
| } |
| |
| static int pvr2_i2c_read(struct pvr2_hdw *hdw, /* Context */ |
| u8 i2c_addr, /* I2C address we're talking to */ |
| u8 *data, /* Data to write */ |
| u16 dlen, /* Size of data to write */ |
| u8 *res, /* Where to put data we read */ |
| u16 rlen) /* Amount of data to read */ |
| { |
| /* Return value - default 0 means success */ |
| int ret; |
| |
| |
| if (!data) dlen = 0; |
| if (dlen > (sizeof(hdw->cmd_buffer) - 4)) { |
| pvr2_trace(PVR2_TRACE_ERROR_LEGS, |
| "Killing an I2C read to %u that has wlen too large" |
| " (desired=%u limit=%u)", |
| i2c_addr, |
| dlen,(unsigned int)(sizeof(hdw->cmd_buffer) - 4)); |
| return -ENOTSUPP; |
| } |
| if (res && (rlen > (sizeof(hdw->cmd_buffer) - 1))) { |
| pvr2_trace(PVR2_TRACE_ERROR_LEGS, |
| "Killing an I2C read to %u that has rlen too large" |
| " (desired=%u limit=%u)", |
| i2c_addr, |
| rlen,(unsigned int)(sizeof(hdw->cmd_buffer) - 1)); |
| return -ENOTSUPP; |
| } |
| |
| LOCK_TAKE(hdw->ctl_lock); |
| |
| /* Clear the command buffer (likely to be paranoia) */ |
| memset(hdw->cmd_buffer, 0, sizeof(hdw->cmd_buffer)); |
| |
| /* Set up command buffer for an I2C write followed by a read */ |
| hdw->cmd_buffer[0] = FX2CMD_I2C_READ; /* read prefix */ |
| hdw->cmd_buffer[1] = dlen; /* arg length */ |
| hdw->cmd_buffer[2] = rlen; /* answer length. Device will send one |
| more byte (status). */ |
| hdw->cmd_buffer[3] = i2c_addr; /* i2c addr of chip */ |
| if (dlen) memcpy(hdw->cmd_buffer + 4, data, dlen); |
| |
| /* Do the operation */ |
| ret = pvr2_send_request(hdw, |
| hdw->cmd_buffer, |
| 4 + dlen, |
| hdw->cmd_buffer, |
| rlen + 1); |
| if (!ret) { |
| if (hdw->cmd_buffer[0] != 8) { |
| ret = -EIO; |
| if (hdw->cmd_buffer[0] != 7) { |
| trace_i2c("unexpected status" |
| " from i2_read[%d]: %d", |
| i2c_addr,hdw->cmd_buffer[0]); |
| } |
| } |
| } |
| |
| /* Copy back the result */ |
| if (res && rlen) { |
| if (ret) { |
| /* Error, just blank out the return buffer */ |
| memset(res, 0, rlen); |
| } else { |
| memcpy(res, hdw->cmd_buffer + 1, rlen); |
| } |
| } |
| |
| LOCK_GIVE(hdw->ctl_lock); |
| |
| return ret; |
| } |
| |
| /* This is the common low level entry point for doing I2C operations to the |
| hardware. */ |
| static int pvr2_i2c_basic_op(struct pvr2_hdw *hdw, |
| u8 i2c_addr, |
| u8 *wdata, |
| u16 wlen, |
| u8 *rdata, |
| u16 rlen) |
| { |
| if (!rdata) rlen = 0; |
| if (!wdata) wlen = 0; |
| if (rlen || !wlen) { |
| return pvr2_i2c_read(hdw,i2c_addr,wdata,wlen,rdata,rlen); |
| } else { |
| return pvr2_i2c_write(hdw,i2c_addr,wdata,wlen); |
| } |
| } |
| |
| |
| /* This is a special entry point for cases of I2C transaction attempts to |
| the IR receiver. The implementation here simulates the IR receiver by |
| issuing a command to the FX2 firmware and using that response to return |
| what the real I2C receiver would have returned. We use this for 24xxx |
| devices, where the IR receiver chip has been removed and replaced with |
| FX2 related logic. */ |
| static int i2c_24xxx_ir(struct pvr2_hdw *hdw, |
| u8 i2c_addr,u8 *wdata,u16 wlen,u8 *rdata,u16 rlen) |
| { |
| u8 dat[4]; |
| unsigned int stat; |
| |
| if (!(rlen || wlen)) { |
| /* This is a probe attempt. Just let it succeed. */ |
| return 0; |
| } |
| |
| /* We don't understand this kind of transaction */ |
| if ((wlen != 0) || (rlen == 0)) return -EIO; |
| |
| if (rlen < 3) { |
| /* Mike Isely <isely@pobox.com> Appears to be a probe |
| attempt from lirc. Just fill in zeroes and return. If |
| we try instead to do the full transaction here, then bad |
| things seem to happen within the lirc driver module |
| (version 0.8.0-7 sources from Debian, when run under |
| vanilla 2.6.17.6 kernel) - and I don't have the patience |
| to chase it down. */ |
| if (rlen > 0) rdata[0] = 0; |
| if (rlen > 1) rdata[1] = 0; |
| return 0; |
| } |
| |
| /* Issue a command to the FX2 to read the IR receiver. */ |
| LOCK_TAKE(hdw->ctl_lock); do { |
| hdw->cmd_buffer[0] = FX2CMD_GET_IR_CODE; |
| stat = pvr2_send_request(hdw, |
| hdw->cmd_buffer,1, |
| hdw->cmd_buffer,4); |
| dat[0] = hdw->cmd_buffer[0]; |
| dat[1] = hdw->cmd_buffer[1]; |
| dat[2] = hdw->cmd_buffer[2]; |
| dat[3] = hdw->cmd_buffer[3]; |
| } while (0); LOCK_GIVE(hdw->ctl_lock); |
| |
| /* Give up if that operation failed. */ |
| if (stat != 0) return stat; |
| |
| /* Mangle the results into something that looks like the real IR |
| receiver. */ |
| rdata[2] = 0xc1; |
| if (dat[0] != 1) { |
| /* No code received. */ |
| rdata[0] = 0; |
| rdata[1] = 0; |
| } else { |
| u16 val; |
| /* Mash the FX2 firmware-provided IR code into something |
| that the normal i2c chip-level driver expects. */ |
| val = dat[1]; |
| val <<= 8; |
| val |= dat[2]; |
| val >>= 1; |
| val &= ~0x0003; |
| val |= 0x8000; |
| rdata[0] = (val >> 8) & 0xffu; |
| rdata[1] = val & 0xffu; |
| } |
| |
| return 0; |
| } |
| |
| /* This is a special entry point that is entered if an I2C operation is |
| attempted to a wm8775 chip on model 24xxx hardware. Autodetect of this |
| part doesn't work, but we know it is really there. So let's look for |
| the autodetect attempt and just return success if we see that. */ |
| static int i2c_hack_wm8775(struct pvr2_hdw *hdw, |
| u8 i2c_addr,u8 *wdata,u16 wlen,u8 *rdata,u16 rlen) |
| { |
| if (!(rlen || wlen)) { |
| // This is a probe attempt. Just let it succeed. |
| return 0; |
| } |
| return pvr2_i2c_basic_op(hdw,i2c_addr,wdata,wlen,rdata,rlen); |
| } |
| |
| /* This is an entry point designed to always fail any attempt to perform a |
| transfer. We use this to cause certain I2C addresses to not be |
| probed. */ |
| static int i2c_black_hole(struct pvr2_hdw *hdw, |
| u8 i2c_addr,u8 *wdata,u16 wlen,u8 *rdata,u16 rlen) |
| { |
| return -EIO; |
| } |
| |
| /* This is a special entry point that is entered if an I2C operation is |
| attempted to a cx25840 chip on model 24xxx hardware. This chip can |
| sometimes wedge itself. Worse still, when this happens msp3400 can |
| falsely detect this part and then the system gets hosed up after msp3400 |
| gets confused and dies. What we want to do here is try to keep msp3400 |
| away and also try to notice if the chip is wedged and send a warning to |
| the system log. */ |
| static int i2c_hack_cx25840(struct pvr2_hdw *hdw, |
| u8 i2c_addr,u8 *wdata,u16 wlen,u8 *rdata,u16 rlen) |
| { |
| int ret; |
| unsigned int subaddr; |
| u8 wbuf[2]; |
| int state = hdw->i2c_cx25840_hack_state; |
| |
| if (!(rlen || wlen)) { |
| // Probe attempt - always just succeed and don't bother the |
| // hardware (this helps to make the state machine further |
| // down somewhat easier). |
| return 0; |
| } |
| |
| if (state == 3) { |
| return pvr2_i2c_basic_op(hdw,i2c_addr,wdata,wlen,rdata,rlen); |
| } |
| |
| /* We're looking for the exact pattern where the revision register |
| is being read. The cx25840 module will always look at the |
| revision register first. Any other pattern of access therefore |
| has to be a probe attempt from somebody else so we'll reject it. |
| Normally we could just let each client just probe the part |
| anyway, but when the cx25840 is wedged, msp3400 will get a false |
| positive and that just screws things up... */ |
| |
| if (wlen == 0) { |
| switch (state) { |
| case 1: subaddr = 0x0100; break; |
| case 2: subaddr = 0x0101; break; |
| default: goto fail; |
| } |
| } else if (wlen == 2) { |
| subaddr = (wdata[0] << 8) | wdata[1]; |
| switch (subaddr) { |
| case 0x0100: state = 1; break; |
| case 0x0101: state = 2; break; |
| default: goto fail; |
| } |
| } else { |
| goto fail; |
| } |
| if (!rlen) goto success; |
| state = 0; |
| if (rlen != 1) goto fail; |
| |
| /* If we get to here then we have a legitimate read for one of the |
| two revision bytes, so pass it through. */ |
| wbuf[0] = subaddr >> 8; |
| wbuf[1] = subaddr; |
| ret = pvr2_i2c_basic_op(hdw,i2c_addr,wbuf,2,rdata,rlen); |
| |
| if ((ret != 0) || (*rdata == 0x04) || (*rdata == 0x0a)) { |
| pvr2_trace(PVR2_TRACE_ERROR_LEGS, |
| "WARNING: Detected a wedged cx25840 chip;" |
| " the device will not work."); |
| pvr2_trace(PVR2_TRACE_ERROR_LEGS, |
| "WARNING: Try power cycling the pvrusb2 device."); |
| pvr2_trace(PVR2_TRACE_ERROR_LEGS, |
| "WARNING: Disabling further access to the device" |
| " to prevent other foul-ups."); |
| // This blocks all further communication with the part. |
| hdw->i2c_func[0x44] = NULL; |
| pvr2_hdw_render_useless(hdw); |
| goto fail; |
| } |
| |
| /* Success! */ |
| pvr2_trace(PVR2_TRACE_CHIPS,"cx25840 appears to be OK."); |
| state = 3; |
| |
| success: |
| hdw->i2c_cx25840_hack_state = state; |
| return 0; |
| |
| fail: |
| hdw->i2c_cx25840_hack_state = state; |
| return -EIO; |
| } |
| |
| /* This is a very, very limited I2C adapter implementation. We can only |
| support what we actually know will work on the device... */ |
| static int pvr2_i2c_xfer(struct i2c_adapter *i2c_adap, |
| struct i2c_msg msgs[], |
| int num) |
| { |
| int ret = -ENOTSUPP; |
| pvr2_i2c_func funcp = NULL; |
| struct pvr2_hdw *hdw = (struct pvr2_hdw *)(i2c_adap->algo_data); |
| |
| if (!num) { |
| ret = -EINVAL; |
| goto done; |
| } |
| if (msgs[0].addr < PVR2_I2C_FUNC_CNT) { |
| funcp = hdw->i2c_func[msgs[0].addr]; |
| } |
| if (!funcp) { |
| ret = -EIO; |
| goto done; |
| } |
| |
| if (num == 1) { |
| if (msgs[0].flags & I2C_M_RD) { |
| /* Simple read */ |
| u16 tcnt,bcnt,offs; |
| if (!msgs[0].len) { |
| /* Length == 0 read. This is a probe. */ |
| if (funcp(hdw,msgs[0].addr,NULL,0,NULL,0)) { |
| ret = -EIO; |
| goto done; |
| } |
| ret = 1; |
| goto done; |
| } |
| /* If the read is short enough we'll do the whole |
| thing atomically. Otherwise we have no choice |
| but to break apart the reads. */ |
| tcnt = msgs[0].len; |
| offs = 0; |
| while (tcnt) { |
| bcnt = tcnt; |
| if (bcnt > sizeof(hdw->cmd_buffer)-1) { |
| bcnt = sizeof(hdw->cmd_buffer)-1; |
| } |
| if (funcp(hdw,msgs[0].addr,NULL,0, |
| msgs[0].buf+offs,bcnt)) { |
| ret = -EIO; |
| goto done; |
| } |
| offs += bcnt; |
| tcnt -= bcnt; |
| } |
| ret = 1; |
| goto done; |
| } else { |
| /* Simple write */ |
| ret = 1; |
| if (funcp(hdw,msgs[0].addr, |
| msgs[0].buf,msgs[0].len,NULL,0)) { |
| ret = -EIO; |
| } |
| goto done; |
| } |
| } else if (num == 2) { |
| if (msgs[0].addr != msgs[1].addr) { |
| trace_i2c("i2c refusing 2 phase transfer with" |
| " conflicting target addresses"); |
| ret = -ENOTSUPP; |
| goto done; |
| } |
| if ((!((msgs[0].flags & I2C_M_RD))) && |
| (msgs[1].flags & I2C_M_RD)) { |
| u16 tcnt,bcnt,wcnt,offs; |
| /* Write followed by atomic read. If the read |
| portion is short enough we'll do the whole thing |
| atomically. Otherwise we have no choice but to |
| break apart the reads. */ |
| tcnt = msgs[1].len; |
| wcnt = msgs[0].len; |
| offs = 0; |
| while (tcnt || wcnt) { |
| bcnt = tcnt; |
| if (bcnt > sizeof(hdw->cmd_buffer)-1) { |
| bcnt = sizeof(hdw->cmd_buffer)-1; |
| } |
| if (funcp(hdw,msgs[0].addr, |
| msgs[0].buf,wcnt, |
| msgs[1].buf+offs,bcnt)) { |
| ret = -EIO; |
| goto done; |
| } |
| offs += bcnt; |
| tcnt -= bcnt; |
| wcnt = 0; |
| } |
| ret = 2; |
| goto done; |
| } else { |
| trace_i2c("i2c refusing complex transfer" |
| " read0=%d read1=%d", |
| (msgs[0].flags & I2C_M_RD), |
| (msgs[1].flags & I2C_M_RD)); |
| } |
| } else { |
| trace_i2c("i2c refusing %d phase transfer",num); |
| } |
| |
| done: |
| if (pvrusb2_debug & PVR2_TRACE_I2C_TRAF) { |
| unsigned int idx,offs,cnt; |
| for (idx = 0; idx < num; idx++) { |
| cnt = msgs[idx].len; |
| printk(KERN_INFO |
| "pvrusb2 i2c xfer %u/%u:" |
| " addr=0x%x len=%d %s", |
| idx+1,num, |
| msgs[idx].addr, |
| cnt, |
| (msgs[idx].flags & I2C_M_RD ? |
| "read" : "write")); |
| if ((ret > 0) || !(msgs[idx].flags & I2C_M_RD)) { |
| if (cnt > 8) cnt = 8; |
| printk(" ["); |
| for (offs = 0; offs < (cnt>8?8:cnt); offs++) { |
| if (offs) printk(" "); |
| printk("%02x",msgs[idx].buf[offs]); |
| } |
| if (offs < cnt) printk(" ..."); |
| printk("]"); |
| } |
| if (idx+1 == num) { |
| printk(" result=%d",ret); |
| } |
| printk("\n"); |
| } |
| if (!num) { |
| printk(KERN_INFO |
| "pvrusb2 i2c xfer null transfer result=%d\n", |
| ret); |
| } |
| } |
| return ret; |
| } |
| |
| static u32 pvr2_i2c_functionality(struct i2c_adapter *adap) |
| { |
| return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C; |
| } |
| |
| static struct i2c_algorithm pvr2_i2c_algo_template = { |
| .master_xfer = pvr2_i2c_xfer, |
| .functionality = pvr2_i2c_functionality, |
| }; |
| |
| static struct i2c_adapter pvr2_i2c_adap_template = { |
| .owner = THIS_MODULE, |
| .class = 0, |
| }; |
| |
| |
| /* Return true if device exists at given address */ |
| static int do_i2c_probe(struct pvr2_hdw *hdw, int addr) |
| { |
| struct i2c_msg msg[1]; |
| int rc; |
| msg[0].addr = 0; |
| msg[0].flags = I2C_M_RD; |
| msg[0].len = 0; |
| msg[0].buf = NULL; |
| msg[0].addr = addr; |
| rc = i2c_transfer(&hdw->i2c_adap, msg, ARRAY_SIZE(msg)); |
| return rc == 1; |
| } |
| |
| static void do_i2c_scan(struct pvr2_hdw *hdw) |
| { |
| int i; |
| printk(KERN_INFO "%s: i2c scan beginning\n", hdw->name); |
| for (i = 0; i < 128; i++) { |
| if (do_i2c_probe(hdw, i)) { |
| printk(KERN_INFO "%s: i2c scan: found device @ 0x%x\n", |
| hdw->name, i); |
| } |
| } |
| printk(KERN_INFO "%s: i2c scan done.\n", hdw->name); |
| } |
| |
| static void pvr2_i2c_register_ir(struct pvr2_hdw *hdw) |
| { |
| struct i2c_board_info info; |
| struct IR_i2c_init_data *init_data = &hdw->ir_init_data; |
| if (pvr2_disable_ir_video) { |
| pvr2_trace(PVR2_TRACE_INFO, |
| "Automatic binding of ir_video has been disabled."); |
| return; |
| } |
| memset(&info, 0, sizeof(struct i2c_board_info)); |
| switch (hdw->ir_scheme_active) { |
| case PVR2_IR_SCHEME_24XXX: /* FX2-controlled IR */ |
| case PVR2_IR_SCHEME_29XXX: /* Original 29xxx device */ |
| init_data->ir_codes = RC_MAP_HAUPPAUGE; |
| init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP; |
| init_data->type = RC_TYPE_RC5; |
| init_data->name = hdw->hdw_desc->description; |
| init_data->polling_interval = 100; /* ms From ir-kbd-i2c */ |
| /* IR Receiver */ |
| info.addr = 0x18; |
| info.platform_data = init_data; |
| strlcpy(info.type, "ir_video", I2C_NAME_SIZE); |
| pvr2_trace(PVR2_TRACE_INFO, "Binding %s to i2c address 0x%02x.", |
| info.type, info.addr); |
| i2c_new_device(&hdw->i2c_adap, &info); |
| break; |
| case PVR2_IR_SCHEME_ZILOG: /* HVR-1950 style */ |
| case PVR2_IR_SCHEME_24XXX_MCE: /* 24xxx MCE device */ |
| init_data->ir_codes = RC_MAP_HAUPPAUGE; |
| init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR; |
| init_data->type = RC_TYPE_RC5; |
| init_data->name = hdw->hdw_desc->description; |
| /* IR Receiver */ |
| info.addr = 0x71; |
| info.platform_data = init_data; |
| strlcpy(info.type, "ir_rx_z8f0811_haup", I2C_NAME_SIZE); |
| pvr2_trace(PVR2_TRACE_INFO, "Binding %s to i2c address 0x%02x.", |
| info.type, info.addr); |
| i2c_new_device(&hdw->i2c_adap, &info); |
| /* IR Trasmitter */ |
| info.addr = 0x70; |
| info.platform_data = init_data; |
| strlcpy(info.type, "ir_tx_z8f0811_haup", I2C_NAME_SIZE); |
| pvr2_trace(PVR2_TRACE_INFO, "Binding %s to i2c address 0x%02x.", |
| info.type, info.addr); |
| i2c_new_device(&hdw->i2c_adap, &info); |
| break; |
| default: |
| /* The device either doesn't support I2C-based IR or we |
| don't know (yet) how to operate IR on the device. */ |
| break; |
| } |
| } |
| |
| void pvr2_i2c_core_init(struct pvr2_hdw *hdw) |
| { |
| unsigned int idx; |
| |
| /* The default action for all possible I2C addresses is just to do |
| the transfer normally. */ |
| for (idx = 0; idx < PVR2_I2C_FUNC_CNT; idx++) { |
| hdw->i2c_func[idx] = pvr2_i2c_basic_op; |
| } |
| |
| /* However, deal with various special cases for 24xxx hardware. */ |
| if (ir_mode[hdw->unit_number] == 0) { |
| printk(KERN_INFO "%s: IR disabled\n",hdw->name); |
| hdw->i2c_func[0x18] = i2c_black_hole; |
| } else if (ir_mode[hdw->unit_number] == 1) { |
| if (hdw->ir_scheme_active == PVR2_IR_SCHEME_24XXX) { |
| /* Set up translation so that our IR looks like a |
| 29xxx device */ |
| hdw->i2c_func[0x18] = i2c_24xxx_ir; |
| } |
| } |
| if (hdw->hdw_desc->flag_has_cx25840) { |
| hdw->i2c_func[0x44] = i2c_hack_cx25840; |
| } |
| if (hdw->hdw_desc->flag_has_wm8775) { |
| hdw->i2c_func[0x1b] = i2c_hack_wm8775; |
| } |
| |
| // Configure the adapter and set up everything else related to it. |
| memcpy(&hdw->i2c_adap,&pvr2_i2c_adap_template,sizeof(hdw->i2c_adap)); |
| memcpy(&hdw->i2c_algo,&pvr2_i2c_algo_template,sizeof(hdw->i2c_algo)); |
| strlcpy(hdw->i2c_adap.name,hdw->name,sizeof(hdw->i2c_adap.name)); |
| hdw->i2c_adap.dev.parent = &hdw->usb_dev->dev; |
| hdw->i2c_adap.algo = &hdw->i2c_algo; |
| hdw->i2c_adap.algo_data = hdw; |
| hdw->i2c_linked = !0; |
| i2c_set_adapdata(&hdw->i2c_adap, &hdw->v4l2_dev); |
| i2c_add_adapter(&hdw->i2c_adap); |
| if (hdw->i2c_func[0x18] == i2c_24xxx_ir) { |
| /* Probe for a different type of IR receiver on this |
| device. This is really the only way to differentiate |
| older 24xxx devices from 24xxx variants that include an |
| IR blaster. If the IR blaster is present, the IR |
| receiver is part of that chip and thus we must disable |
| the emulated IR receiver. */ |
| if (do_i2c_probe(hdw, 0x71)) { |
| pvr2_trace(PVR2_TRACE_INFO, |
| "Device has newer IR hardware;" |
| " disabling unneeded virtual IR device"); |
| hdw->i2c_func[0x18] = NULL; |
| /* Remember that this is a different device... */ |
| hdw->ir_scheme_active = PVR2_IR_SCHEME_24XXX_MCE; |
| } |
| } |
| if (i2c_scan) do_i2c_scan(hdw); |
| |
| pvr2_i2c_register_ir(hdw); |
| } |
| |
| void pvr2_i2c_core_done(struct pvr2_hdw *hdw) |
| { |
| if (hdw->i2c_linked) { |
| i2c_del_adapter(&hdw->i2c_adap); |
| hdw->i2c_linked = 0; |
| } |
| } |
| |
| /* |
| Stuff for Emacs to see, in order to encourage consistent editing style: |
| *** Local Variables: *** |
| *** mode: c *** |
| *** fill-column: 75 *** |
| *** tab-width: 8 *** |
| *** c-basic-offset: 8 *** |
| *** End: *** |
| */ |