/*
*
- * $Id$
*
* Copyright (C) 2005 Mike Isely <isely@pobox.com>
*
*
*/
+#include <linux/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. By doing this we can then make use of existing functionality in
- V4L (e.g. tuner.c) rather than rolling our own.
+ device.
*/
-static unsigned int i2c_scan = 0;
+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 unsigned int pvr2_i2c_client_describe(struct pvr2_i2c_client *cp,
- unsigned int detail,
- char *buf,unsigned int maxlen);
+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 = 1;
+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");
+
+/* Mapping of IR schemes to known I2C addresses - if any */
+static const unsigned char ir_video_addresses[] = {
+ [PVR2_IR_SCHEME_29XXX] = 0x18,
+ [PVR2_IR_SCHEME_24XXX] = 0x18,
+};
static int pvr2_i2c_write(struct pvr2_hdw *hdw, /* Context */
u8 i2c_addr, /* I2C address we're talking to */
memset(hdw->cmd_buffer, 0, sizeof(hdw->cmd_buffer));
/* Set up command buffer for an I2C write */
- hdw->cmd_buffer[0] = 0x08; /* write prefix */
+ 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);
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] = 0x09; /* read prefix */
+ 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). */
}
}
+
+/* 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
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
ret = -EINVAL;
goto done;
}
- if ((msgs[0].flags & I2C_M_NOSTART)) {
- trace_i2c("i2c refusing I2C_M_NOSTART");
- goto done;
- }
if (msgs[0].addr < PVR2_I2C_FUNC_CNT) {
funcp = hdw->i2c_func[msgs[0].addr];
}
cnt = msgs[idx].len;
printk(KERN_INFO
"pvrusb2 i2c xfer %u/%u:"
- " addr=0x%x len=%d %s%s",
+ " addr=0x%x len=%d %s",
idx+1,num,
msgs[idx].addr,
cnt,
(msgs[idx].flags & I2C_M_RD ?
- "read" : "write"),
- (msgs[idx].flags & I2C_M_NOSTART ?
- " nostart" : ""));
+ "read" : "write"));
if ((ret > 0) || !(msgs[idx].flags & I2C_M_RD)) {
if (cnt > 8) cnt = 8;
printk(" [");
return ret;
}
-static int pvr2_i2c_control(struct i2c_adapter *adapter,
- unsigned int cmd, unsigned long arg)
-{
- return 0;
-}
-
static u32 pvr2_i2c_functionality(struct i2c_adapter *adap)
{
- return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C | I2C_FUNC_SMBUS_BYTE_DATA;
-}
-
-static int pvr2_i2c_core_singleton(struct i2c_client *cp,
- unsigned int cmd,void *arg)
-{
- int stat;
- if (!cp) return -EINVAL;
- if (!(cp->driver)) return -EINVAL;
- if (!(cp->driver->command)) return -EINVAL;
- if (!try_module_get(cp->driver->driver.owner)) return -EAGAIN;
- stat = cp->driver->command(cp,cmd,arg);
- module_put(cp->driver->driver.owner);
- return stat;
-}
-
-int pvr2_i2c_client_cmd(struct pvr2_i2c_client *cp,unsigned int cmd,void *arg)
-{
- int stat;
- if (pvrusb2_debug & PVR2_TRACE_I2C_CMD) {
- char buf[100];
- unsigned int cnt;
- cnt = pvr2_i2c_client_describe(cp,PVR2_I2C_DETAIL_DEBUG,
- buf,sizeof(buf));
- pvr2_trace(PVR2_TRACE_I2C_CMD,
- "i2c COMMAND (code=%u 0x%x) to %.*s",
- cmd,cmd,cnt,buf);
- }
- stat = pvr2_i2c_core_singleton(cp->client,cmd,arg);
- if (pvrusb2_debug & PVR2_TRACE_I2C_CMD) {
- char buf[100];
- unsigned int cnt;
- cnt = pvr2_i2c_client_describe(cp,PVR2_I2C_DETAIL_DEBUG,
- buf,sizeof(buf));
- pvr2_trace(PVR2_TRACE_I2C_CMD,
- "i2c COMMAND to %.*s (ret=%d)",cnt,buf,stat);
- }
- return stat;
-}
-
-int pvr2_i2c_core_cmd(struct pvr2_hdw *hdw,unsigned int cmd,void *arg)
-{
- struct list_head *item,*nc;
- struct pvr2_i2c_client *cp;
- int stat = -EINVAL;
-
- if (!hdw) return stat;
-
- mutex_lock(&hdw->i2c_list_lock);
- list_for_each_safe(item,nc,&hdw->i2c_clients) {
- cp = list_entry(item,struct pvr2_i2c_client,list);
- if (!cp->recv_enable) continue;
- mutex_unlock(&hdw->i2c_list_lock);
- stat = pvr2_i2c_client_cmd(cp,cmd,arg);
- mutex_lock(&hdw->i2c_list_lock);
- }
- mutex_unlock(&hdw->i2c_list_lock);
- return stat;
-}
-
-
-static int handler_check(struct pvr2_i2c_client *cp)
-{
- struct pvr2_i2c_handler *hp = cp->handler;
- if (!hp) return 0;
- if (!hp->func_table->check) return 0;
- return hp->func_table->check(hp->func_data) != 0;
-}
-
-#define BUFSIZE 500
-
-void pvr2_i2c_core_sync(struct pvr2_hdw *hdw)
-{
- unsigned long msk;
- unsigned int idx;
- struct list_head *item,*nc;
- struct pvr2_i2c_client *cp;
-
- if (!hdw->i2c_linked) return;
- if (!(hdw->i2c_pend_types & PVR2_I2C_PEND_ALL)) {
- return;
- }
- mutex_lock(&hdw->i2c_list_lock); do {
- pvr2_trace(PVR2_TRACE_I2C_CORE,"i2c: core_sync BEGIN");
- if (hdw->i2c_pend_types & PVR2_I2C_PEND_DETECT) {
- /* One or more I2C clients have attached since we
- last synced. So scan the list and identify the
- new clients. */
- char *buf;
- unsigned int cnt;
- unsigned long amask = 0;
- buf = kmalloc(BUFSIZE,GFP_KERNEL);
- pvr2_trace(PVR2_TRACE_I2C_CORE,"i2c: PEND_DETECT");
- hdw->i2c_pend_types &= ~PVR2_I2C_PEND_DETECT;
- list_for_each(item,&hdw->i2c_clients) {
- cp = list_entry(item,struct pvr2_i2c_client,
- list);
- if (!cp->detected_flag) {
- cp->ctl_mask = 0;
- pvr2_i2c_probe(hdw,cp);
- cp->detected_flag = !0;
- msk = cp->ctl_mask;
- cnt = 0;
- if (buf) {
- cnt = pvr2_i2c_client_describe(
- cp,
- PVR2_I2C_DETAIL_ALL,
- buf,BUFSIZE);
- }
- trace_i2c("Probed: %.*s",cnt,buf);
- if (handler_check(cp)) {
- hdw->i2c_pend_types |=
- PVR2_I2C_PEND_CLIENT;
- }
- cp->pend_mask = msk;
- hdw->i2c_pend_mask |= msk;
- hdw->i2c_pend_types |=
- PVR2_I2C_PEND_REFRESH;
- }
- amask |= cp->ctl_mask;
- }
- hdw->i2c_active_mask = amask;
- if (buf) kfree(buf);
- }
- if (hdw->i2c_pend_types & PVR2_I2C_PEND_STALE) {
- /* Need to do one or more global updates. Arrange
- for this to happen. */
- unsigned long m2;
- pvr2_trace(PVR2_TRACE_I2C_CORE,
- "i2c: PEND_STALE (0x%lx)",
- hdw->i2c_stale_mask);
- hdw->i2c_pend_types &= ~PVR2_I2C_PEND_STALE;
- list_for_each(item,&hdw->i2c_clients) {
- cp = list_entry(item,struct pvr2_i2c_client,
- list);
- m2 = hdw->i2c_stale_mask;
- m2 &= cp->ctl_mask;
- m2 &= ~cp->pend_mask;
- if (m2) {
- pvr2_trace(PVR2_TRACE_I2C_CORE,
- "i2c: cp=%p setting 0x%lx",
- cp,m2);
- cp->pend_mask |= m2;
- }
- }
- hdw->i2c_pend_mask |= hdw->i2c_stale_mask;
- hdw->i2c_stale_mask = 0;
- hdw->i2c_pend_types |= PVR2_I2C_PEND_REFRESH;
- }
- if (hdw->i2c_pend_types & PVR2_I2C_PEND_CLIENT) {
- /* One or more client handlers are asking for an
- update. Run through the list of known clients
- and update each one. */
- pvr2_trace(PVR2_TRACE_I2C_CORE,"i2c: PEND_CLIENT");
- hdw->i2c_pend_types &= ~PVR2_I2C_PEND_CLIENT;
- list_for_each_safe(item,nc,&hdw->i2c_clients) {
- cp = list_entry(item,struct pvr2_i2c_client,
- list);
- if (!cp->handler) continue;
- if (!cp->handler->func_table->update) continue;
- pvr2_trace(PVR2_TRACE_I2C_CORE,
- "i2c: cp=%p update",cp);
- mutex_unlock(&hdw->i2c_list_lock);
- cp->handler->func_table->update(
- cp->handler->func_data);
- mutex_lock(&hdw->i2c_list_lock);
- /* If client's update function set some
- additional pending bits, account for that
- here. */
- if (cp->pend_mask & ~hdw->i2c_pend_mask) {
- hdw->i2c_pend_mask |= cp->pend_mask;
- hdw->i2c_pend_types |=
- PVR2_I2C_PEND_REFRESH;
- }
- }
- }
- if (hdw->i2c_pend_types & PVR2_I2C_PEND_REFRESH) {
- const struct pvr2_i2c_op *opf;
- unsigned long pm;
- /* Some actual updates are pending. Walk through
- each update type and perform it. */
- pvr2_trace(PVR2_TRACE_I2C_CORE,"i2c: PEND_REFRESH"
- " (0x%lx)",hdw->i2c_pend_mask);
- hdw->i2c_pend_types &= ~PVR2_I2C_PEND_REFRESH;
- pm = hdw->i2c_pend_mask;
- hdw->i2c_pend_mask = 0;
- for (idx = 0, msk = 1; pm; idx++, msk <<= 1) {
- if (!(pm & msk)) continue;
- pm &= ~msk;
- list_for_each(item,&hdw->i2c_clients) {
- cp = list_entry(item,
- struct pvr2_i2c_client,
- list);
- if (cp->pend_mask & msk) {
- cp->pend_mask &= ~msk;
- cp->recv_enable = !0;
- } else {
- cp->recv_enable = 0;
- }
- }
- opf = pvr2_i2c_get_op(idx);
- if (!opf) continue;
- mutex_unlock(&hdw->i2c_list_lock);
- opf->update(hdw);
- mutex_lock(&hdw->i2c_list_lock);
- }
- }
- pvr2_trace(PVR2_TRACE_I2C_CORE,"i2c: core_sync END");
- } while (0); mutex_unlock(&hdw->i2c_list_lock);
-}
-
-int pvr2_i2c_core_check_stale(struct pvr2_hdw *hdw)
-{
- unsigned long msk,sm,pm;
- unsigned int idx;
- const struct pvr2_i2c_op *opf;
- struct list_head *item;
- struct pvr2_i2c_client *cp;
- unsigned int pt = 0;
-
- pvr2_trace(PVR2_TRACE_I2C_CORE,"pvr2_i2c_core_check_stale BEGIN");
-
- pm = hdw->i2c_active_mask;
- sm = 0;
- for (idx = 0, msk = 1; pm; idx++, msk <<= 1) {
- if (!(msk & pm)) continue;
- pm &= ~msk;
- opf = pvr2_i2c_get_op(idx);
- if (!opf) continue;
- if (opf->check(hdw)) {
- sm |= msk;
- }
- }
- if (sm) pt |= PVR2_I2C_PEND_STALE;
-
- list_for_each(item,&hdw->i2c_clients) {
- cp = list_entry(item,struct pvr2_i2c_client,list);
- if (!handler_check(cp)) continue;
- pt |= PVR2_I2C_PEND_CLIENT;
- }
-
- if (pt) {
- mutex_lock(&hdw->i2c_list_lock); do {
- hdw->i2c_pend_types |= pt;
- hdw->i2c_stale_mask |= sm;
- hdw->i2c_pend_mask |= hdw->i2c_stale_mask;
- } while (0); mutex_unlock(&hdw->i2c_list_lock);
- }
-
- pvr2_trace(PVR2_TRACE_I2C_CORE,
- "i2c: types=0x%x stale=0x%lx pend=0x%lx",
- hdw->i2c_pend_types,
- hdw->i2c_stale_mask,
- hdw->i2c_pend_mask);
- pvr2_trace(PVR2_TRACE_I2C_CORE,"pvr2_i2c_core_check_stale END");
-
- return (hdw->i2c_pend_types & PVR2_I2C_PEND_ALL) != 0;
-}
-
-static unsigned int pvr2_i2c_client_describe(struct pvr2_i2c_client *cp,
- unsigned int detail,
- char *buf,unsigned int maxlen)
-{
- unsigned int ccnt,bcnt;
- int spcfl = 0;
- const struct pvr2_i2c_op *opf;
-
- ccnt = 0;
- if (detail & PVR2_I2C_DETAIL_DEBUG) {
- bcnt = scnprintf(buf,maxlen,
- "ctxt=%p ctl_mask=0x%lx",
- cp,cp->ctl_mask);
- ccnt += bcnt; buf += bcnt; maxlen -= bcnt;
- spcfl = !0;
- }
- bcnt = scnprintf(buf,maxlen,
- "%s%s @ 0x%x",
- (spcfl ? " " : ""),
- cp->client->name,
- cp->client->addr);
- ccnt += bcnt; buf += bcnt; maxlen -= bcnt;
- if ((detail & PVR2_I2C_DETAIL_HANDLER) &&
- cp->handler && cp->handler->func_table->describe) {
- bcnt = scnprintf(buf,maxlen," (");
- ccnt += bcnt; buf += bcnt; maxlen -= bcnt;
- bcnt = cp->handler->func_table->describe(
- cp->handler->func_data,buf,maxlen);
- ccnt += bcnt; buf += bcnt; maxlen -= bcnt;
- bcnt = scnprintf(buf,maxlen,")");
- ccnt += bcnt; buf += bcnt; maxlen -= bcnt;
- }
- if ((detail & PVR2_I2C_DETAIL_CTLMASK) && cp->ctl_mask) {
- unsigned int idx;
- unsigned long msk,sm;
- int spcfl;
- bcnt = scnprintf(buf,maxlen," [");
- ccnt += bcnt; buf += bcnt; maxlen -= bcnt;
- sm = 0;
- spcfl = 0;
- for (idx = 0, msk = 1; msk; idx++, msk <<= 1) {
- if (!(cp->ctl_mask & msk)) continue;
- opf = pvr2_i2c_get_op(idx);
- if (opf) {
- bcnt = scnprintf(buf,maxlen,"%s%s",
- spcfl ? " " : "",
- opf->name);
- ccnt += bcnt; buf += bcnt; maxlen -= bcnt;
- spcfl = !0;
- } else {
- sm |= msk;
- }
- }
- if (sm) {
- bcnt = scnprintf(buf,maxlen,"%s%lx",
- idx != 0 ? " " : "",sm);
- ccnt += bcnt; buf += bcnt; maxlen -= bcnt;
- }
- bcnt = scnprintf(buf,maxlen,"]");
- ccnt += bcnt; buf += bcnt; maxlen -= bcnt;
- }
- return ccnt;
-}
-
-unsigned int pvr2_i2c_report(struct pvr2_hdw *hdw,
- char *buf,unsigned int maxlen)
-{
- unsigned int ccnt,bcnt;
- struct list_head *item;
- struct pvr2_i2c_client *cp;
- ccnt = 0;
- mutex_lock(&hdw->i2c_list_lock); do {
- list_for_each(item,&hdw->i2c_clients) {
- cp = list_entry(item,struct pvr2_i2c_client,list);
- bcnt = pvr2_i2c_client_describe(
- cp,
- (PVR2_I2C_DETAIL_HANDLER|
- PVR2_I2C_DETAIL_CTLMASK),
- buf,maxlen);
- ccnt += bcnt; buf += bcnt; maxlen -= bcnt;
- bcnt = scnprintf(buf,maxlen,"\n");
- ccnt += bcnt; buf += bcnt; maxlen -= bcnt;
- }
- } while (0); mutex_unlock(&hdw->i2c_list_lock);
- return ccnt;
-}
-
-static int pvr2_i2c_attach_inform(struct i2c_client *client)
-{
- struct pvr2_hdw *hdw = (struct pvr2_hdw *)(client->adapter->algo_data);
- struct pvr2_i2c_client *cp;
- int fl = !(hdw->i2c_pend_types & PVR2_I2C_PEND_ALL);
- cp = kmalloc(sizeof(*cp),GFP_KERNEL);
- trace_i2c("i2c_attach [client=%s @ 0x%x ctxt=%p]",
- client->name,
- client->addr,cp);
- if (!cp) return -ENOMEM;
- memset(cp,0,sizeof(*cp));
- INIT_LIST_HEAD(&cp->list);
- cp->client = client;
- mutex_lock(&hdw->i2c_list_lock); do {
- list_add_tail(&cp->list,&hdw->i2c_clients);
- hdw->i2c_pend_types |= PVR2_I2C_PEND_DETECT;
- } while (0); mutex_unlock(&hdw->i2c_list_lock);
- if (fl) pvr2_hdw_poll_trigger_unlocked(hdw);
- return 0;
-}
-
-static int pvr2_i2c_detach_inform(struct i2c_client *client)
-{
- struct pvr2_hdw *hdw = (struct pvr2_hdw *)(client->adapter->algo_data);
- struct pvr2_i2c_client *cp;
- struct list_head *item,*nc;
- unsigned long amask = 0;
- int foundfl = 0;
- mutex_lock(&hdw->i2c_list_lock); do {
- list_for_each_safe(item,nc,&hdw->i2c_clients) {
- cp = list_entry(item,struct pvr2_i2c_client,list);
- if (cp->client == client) {
- trace_i2c("pvr2_i2c_detach"
- " [client=%s @ 0x%x ctxt=%p]",
- client->name,
- client->addr,cp);
- if (cp->handler &&
- cp->handler->func_table->detach) {
- cp->handler->func_table->detach(
- cp->handler->func_data);
- }
- list_del(&cp->list);
- kfree(cp);
- foundfl = !0;
- continue;
- }
- amask |= cp->ctl_mask;
- }
- hdw->i2c_active_mask = amask;
- } while (0); mutex_unlock(&hdw->i2c_list_lock);
- if (!foundfl) {
- trace_i2c("pvr2_i2c_detach [client=%s @ 0x%x ctxt=<unknown>]",
- client->name,
- client->addr);
- }
- return 0;
+ return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C;
}
static struct i2c_algorithm pvr2_i2c_algo_template = {
.master_xfer = pvr2_i2c_xfer,
- .algo_control = pvr2_i2c_control,
.functionality = pvr2_i2c_functionality,
};
static struct i2c_adapter pvr2_i2c_adap_template = {
.owner = THIS_MODULE,
- .class = I2C_CLASS_TV_ANALOG,
+ .class = 0,
.id = I2C_HW_B_BT848,
- .client_register = pvr2_i2c_attach_inform,
- .client_unregister = pvr2_i2c_detach_inform,
};
-static void do_i2c_scan(struct pvr2_hdw *hdw)
+
+/* 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 i,rc;
+ int rc;
msg[0].addr = 0;
msg[0].flags = I2C_M_RD;
msg[0].len = 0;
msg[0].buf = NULL;
- printk("%s: i2c scan beginning\n",hdw->name);
+ 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++) {
- msg[0].addr = i;
- rc = i2c_transfer(&hdw->i2c_adap,msg,
- sizeof(msg)/sizeof(msg[0]));
- if (rc != 1) continue;
- printk("%s: i2c scan: found device @ 0x%x\n",hdw->name,i);
+ if (do_i2c_probe(hdw, i)) {
+ printk(KERN_INFO "%s: i2c scan: found device @ 0x%x\n",
+ hdw->name, i);
+ }
}
- printk("%s: i2c scan done.\n",hdw->name);
+ 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;
+ unsigned char addr = 0;
+ if (pvr2_disable_ir_video) {
+ pvr2_trace(PVR2_TRACE_INFO,
+ "Automatic binding of ir_video has been disabled.");
+ return;
+ }
+ if (hdw->ir_scheme_active < ARRAY_SIZE(ir_video_addresses)) {
+ addr = ir_video_addresses[hdw->ir_scheme_active];
+ }
+ if (!addr) {
+ /* The device either doesn't support I2C-based IR or we
+ don't know (yet) how to operate IR on the device. */
+ return;
+ }
+ pvr2_trace(PVR2_TRACE_INFO,
+ "Binding ir_video to i2c address 0x%02x.", addr);
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
+ info.addr = addr;
+ i2c_new_device(&hdw->i2c_adap, &info);
}
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.
+ /* 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;
}
- // If however we're dealing with new hardware, insert some hacks in
- // the I2C transfer stack to let things work better.
- if (hdw->hdw_type == PVR2_HDW_TYPE_24XXX) {
- hdw->i2c_func[0x1b] = i2c_hack_wm8775;
+ /* 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_pend_mask = 0;
- hdw->i2c_stale_mask = 0;
- hdw->i2c_active_mask = 0;
- INIT_LIST_HEAD(&hdw->i2c_clients);
- mutex_init(&hdw->i2c_list_lock);
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)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff