DVB (2420): Makes integration of future devices easier
authorPatrick Boettcher <pb@linuxtv.org>
Mon, 9 Jan 2006 17:25:04 +0000 (15:25 -0200)
committerMauro Carvalho Chehab <mchehab@brturbo.com.br>
Mon, 9 Jan 2006 17:25:04 +0000 (15:25 -0200)
- To make the integration of future devices easier
- modified the dvb-usb-part to allow a device-specific firmware download
- added an option to specify whether a device reconnects after a firmware download or not.

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
drivers/media/dvb/dvb-usb/dvb-usb-common.h
drivers/media/dvb/dvb-usb/dvb-usb-firmware.c
drivers/media/dvb/dvb-usb/dvb-usb-init.c
drivers/media/dvb/dvb-usb/dvb-usb.h

index 7300489d3e2420b66bcdf21450394faab5106e22..a3460bf2d9fa56eb1ab4495678a51ede6b0d4b63 100644 (file)
@@ -24,7 +24,7 @@ extern int dvb_usb_disable_rc_polling;
 #define deb_mem(args...)  dprintk(dvb_usb_debug,0x80,args)
 
 /* commonly used  methods */
-extern int usb_cypress_load_firmware(struct usb_device *, const char *, int);
+extern int dvb_usb_download_firmware(struct usb_device *, struct dvb_usb_properties *);
 
 extern int dvb_usb_urb_submit(struct dvb_usb_device *);
 extern int dvb_usb_urb_kill(struct dvb_usb_device *);
index 5244e39770a0e425cc691420240bde8ea1deb715..ab87af99d36fe9b676d498c0c4ab6b799e6b9f5e 100644 (file)
@@ -9,7 +9,6 @@
  */
 #include "dvb-usb-common.h"
 
-#include <linux/firmware.h>
 #include <linux/usb.h>
 
 struct usb_cypress_controller {
@@ -19,9 +18,10 @@ struct usb_cypress_controller {
 };
 
 static struct usb_cypress_controller cypress[] = {
-       { .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cpu_cs_register = 0x7f92 },
-       { .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cpu_cs_register = 0x7f92 },
-       { .id = CYPRESS_FX2,    .name = "Cypress FX2",    .cpu_cs_register = 0xe600 },
+       { .id = DEVICE_SPECIFIC, .name = "Device specific", .cpu_cs_register = 0 },
+       { .id = CYPRESS_AN2135,  .name = "Cypress AN2135",  .cpu_cs_register = 0x7f92 },
+       { .id = CYPRESS_AN2235,  .name = "Cypress AN2235",  .cpu_cs_register = 0x7f92 },
+       { .id = CYPRESS_FX2,     .name = "Cypress FX2",     .cpu_cs_register = 0xe600 },
 };
 
 /*
@@ -33,68 +33,113 @@ static int usb_cypress_writemem(struct usb_device *udev,u16 addr,u8 *data, u8 le
                        0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5*HZ);
 }
 
-int usb_cypress_load_firmware(struct usb_device *udev, const char *filename, int type)
+static int usb_cypress_load_firmware(struct usb_device *udev, const struct firmware *fw, int type)
 {
-       const struct firmware *fw = NULL;
-       u16 addr;
-       u8 *b,*p;
-       int ret = 0,i;
+       struct hexline hx;
+       u8 reset;
+       int ret,pos=0;
 
-       if ((ret = request_firmware(&fw, filename, &udev->dev)) != 0) {
-               err("did not find the firmware file. (%s) "
-                       "Please see linux/Documentation/dvb/ for more details on firmware-problems.",
-                       filename);
+       /* stop the CPU */
+       reset = 1;
+       if ((ret = usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1)) != 1)
+               err("could not stop the USB controller CPU.");
+
+       while ((ret = dvb_usb_get_hexline(fw,&hx,&pos)) > 0) {
+               deb_fw("writing to address 0x%04x (buffer: 0x%02x %02x)\n",hx.addr,hx.len,hx.chk);
+               ret = usb_cypress_writemem(udev,hx.addr,hx.data,hx.len);
+
+               if (ret != hx.len) {
+                       err("error while transferring firmware "
+                               "(transferred size: %d, block size: %d)",
+                               ret,hx.len);
+                       ret = -EINVAL;
+                       break;
+               }
+       }
+       if (ret < 0) {
+               err("firmware download failed at %d with %d",pos,ret);
                return ret;
        }
 
-       info("downloading firmware from file '%s' to the '%s'",filename,cypress[type].name);
-
-       p = kmalloc(fw->size,GFP_KERNEL);
-       if (p != NULL) {
-               u8 reset;
-               /*
-                * you cannot use the fw->data as buffer for
-                * usb_control_msg, a new buffer has to be
-                * created
-                */
-               memcpy(p,fw->data,fw->size);
-
-               /* stop the CPU */
-               reset = 1;
-               if ((ret = usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1)) != 1)
-                       err("could not stop the USB controller CPU.");
-               for(i = 0; p[i+3] == 0 && i < fw->size; ) {
-                       b = (u8 *) &p[i];
-                       addr = cpu_to_le16( *((u16 *) &b[1]) );
-
-                       deb_fw("writing to address 0x%04x (buffer: 0x%02x%02x)\n",addr,b[1],b[2]);
-
-                       ret = usb_cypress_writemem(udev,addr,&b[4],b[0]);
-
-                       if (ret != b[0]) {
-                               err("error while transferring firmware "
-                                       "(transferred size: %d, block size: %d)",
-                                       ret,b[0]);
-                               ret = -EINVAL;
-                               break;
-                       }
-                       i += 5 + b[0];
-               }
-               /* length in ret */
-               if (ret > 0)
-                       ret = 0;
+       if (ret == 0) {
                /* restart the CPU */
                reset = 0;
                if (ret || usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1) != 1) {
                        err("could not restart the USB controller CPU.");
                        ret = -EINVAL;
                }
+       } else
+               ret = -EIO;
 
-               kfree(p);
-       } else {
-               ret = -ENOMEM;
+       return ret;
+}
+
+int dvb_usb_download_firmware(struct usb_device *udev, struct dvb_usb_properties *props)
+{
+       int ret;
+       const struct firmware *fw = NULL;
+
+       if ((ret = request_firmware(&fw, props->firmware, &udev->dev)) != 0) {
+               err("did not find the firmware file. (%s) "
+                       "Please see linux/Documentation/dvb/ for more details on firmware-problems. (%d)",
+                       props->firmware,ret);
+               return ret;
        }
-       release_firmware(fw);
 
+       info("downloading firmware from file '%s'",props->firmware);
+
+       switch (props->usb_ctrl) {
+               case CYPRESS_AN2135:
+               case CYPRESS_AN2235:
+               case CYPRESS_FX2:
+                       ret = usb_cypress_load_firmware(udev, fw, props->usb_ctrl);
+                       break;
+               case DEVICE_SPECIFIC:
+                       if (props->download_firmware)
+                               ret = props->download_firmware(udev,fw);
+                       else {
+                               err("BUG: driver didn't specified a download_firmware-callback, although it claims to have a DEVICE_SPECIFIC one.");
+                               ret = -EINVAL;
+                       }
+                       break;
+               default:
+                       ret = -EINVAL;
+                       break;
+       }
+
+       release_firmware(fw);
        return ret;
 }
+
+int dvb_usb_get_hexline(const struct firmware *fw, struct hexline *hx, int *pos)
+{
+       u8 *b = (u8 *) &fw->data[*pos];
+       int data_offs = 4;
+       if (*pos >= fw->size)
+               return 0;
+
+       memset(hx,0,sizeof(struct hexline));
+
+       hx->len  = b[0];
+
+       if ((*pos + hx->len + 4) >= fw->size)
+               return -EINVAL;
+
+       hx->addr = le16_to_cpu( *((u16 *) &b[1]) );
+       hx->type = b[3];
+
+       if (hx->type == 0x04) {
+               /* b[4] and b[5] are the Extended linear address record data field */
+               hx->addr |= (b[4] << 24) | (b[5] << 16);
+/*             hx->len -= 2;
+               data_offs += 2; */
+       }
+       memcpy(hx->data,&b[data_offs],hx->len);
+       hx->chk = b[hx->len + data_offs];
+
+       *pos += hx->len + 5;
+
+       return *pos;
+}
+EXPORT_SYMBOL(dvb_usb_get_hexline);
+
index dd8e0b94edbab6ae619c1a0d91abc667071b5ffc..2f9c3638adcf58b9d627156291a2ab208d4fa412 100644 (file)
@@ -145,38 +145,40 @@ int dvb_usb_device_init(struct usb_interface *intf, struct dvb_usb_properties
 
        if (cold) {
                info("found a '%s' in cold state, will try to load a firmware",desc->name);
-               ret = usb_cypress_load_firmware(udev,props->firmware,props->usb_ctrl);
-       } else {
-               info("found a '%s' in warm state.",desc->name);
-               d = kmalloc(sizeof(struct dvb_usb_device),GFP_KERNEL);
-               if (d == NULL) {
-                       err("no memory for 'struct dvb_usb_device'");
+               ret = dvb_usb_download_firmware(udev,props);
+               if (!props->no_reconnect)
                        return ret;
+       }
+
+       info("found a '%s' in warm state.",desc->name);
+       d = kmalloc(sizeof(struct dvb_usb_device),GFP_KERNEL);
+       if (d == NULL) {
+               err("no memory for 'struct dvb_usb_device'");
+               return ret;
+       }
+       memset(d,0,sizeof(struct dvb_usb_device));
+
+       d->udev = udev;
+       memcpy(&d->props,props,sizeof(struct dvb_usb_properties));
+       d->desc = desc;
+       d->owner = owner;
+
+       if (d->props.size_of_priv > 0) {
+               d->priv = kmalloc(d->props.size_of_priv,GFP_KERNEL);
+               if (d->priv == NULL) {
+                       err("no memory for priv in 'struct dvb_usb_device'");
+                       kfree(d);
+                       return -ENOMEM;
                }
-               memset(d,0,sizeof(struct dvb_usb_device));
-
-               d->udev = udev;
-               memcpy(&d->props,props,sizeof(struct dvb_usb_properties));
-               d->desc = desc;
-               d->owner = owner;
-
-               if (d->props.size_of_priv > 0) {
-                       d->priv = kmalloc(d->props.size_of_priv,GFP_KERNEL);
-                       if (d->priv == NULL) {
-                               err("no memory for priv in 'struct dvb_usb_device'");
-                               kfree(d);
-                               return -ENOMEM;
-                       }
-                       memset(d->priv,0,d->props.size_of_priv);
-               }
+               memset(d->priv,0,d->props.size_of_priv);
+       }
 
-               usb_set_intfdata(intf, d);
+       usb_set_intfdata(intf, d);
 
-               if (du != NULL)
-                       *du = d;
+       if (du != NULL)
+               *du = d;
 
-               ret = dvb_usb_init(d);
-       }
+       ret = dvb_usb_init(d);
 
        if (ret == 0)
                info("%s successfully initialized and connected.",desc->name);
index b4a1a98006c7d9f8abcf95686cb93db84b401fde..cd510fba60eef64c01417c8b217d1f3d57a9a010 100644 (file)
@@ -12,6 +12,7 @@
 #include <linux/input.h>
 #include <linux/module.h>
 #include <linux/usb.h>
+#include <linux/firmware.h>
 
 #include "dvb_frontend.h"
 #include "dvb_demux.h"
@@ -94,7 +95,11 @@ struct dvb_usb_device;
  * @usb_ctrl: which USB device-side controller is in use. Needed for firmware
  *  download.
  * @firmware: name of the firmware file.
- *
+ * @download_firmware: called to download the firmware when the usb_ctrl is
+ *  DEVICE_SPECIFIC.
+ * @no_reconnect: device doesn't do a reconnect after downloading the firmware,
+    so do the warm initialization right after it
+
  * @size_of_priv: how many bytes shall be allocated for the private field
  *  of struct dvb_usb_device.
  *
@@ -142,11 +147,14 @@ struct dvb_usb_properties {
        int caps;
        int pid_filter_count;
 
-#define CYPRESS_AN2135  0
-#define CYPRESS_AN2235  1
-#define CYPRESS_FX2     2
+#define DEVICE_SPECIFIC 0
+#define CYPRESS_AN2135  1
+#define CYPRESS_AN2235  2
+#define CYPRESS_FX2     3
        int usb_ctrl;
-       const char *firmware;
+       const char firmware[FIRMWARE_NAME_MAX];
+       int (*download_firmware) (struct usb_device *, const struct firmware *);
+       int no_reconnect;
 
        int size_of_priv;
 
@@ -326,5 +334,14 @@ extern int dvb_usb_pll_init_i2c(struct dvb_frontend *);
 extern int dvb_usb_pll_set(struct dvb_frontend *, struct dvb_frontend_parameters *, u8[]);
 extern int dvb_usb_pll_set_i2c(struct dvb_frontend *, struct dvb_frontend_parameters *);
 
+/* commonly used firmware download types and function */
+struct hexline {
+       u8 len;
+       u32 addr;
+       u8 type;
+       u8 data[255];
+       u8 chk;
+};
+extern int dvb_usb_get_hexline(const struct firmware *, struct hexline *, int *);
 
 #endif