[media] dvb_usb_v2: Cypress firmware download module

Firmware handling routines for various Cypress chips.
Cypress AN2135
Cypress AN2235
Cypress FX2

These were split out from general DVB USB module by
Patrick Boettcher. I did only small changes.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/dvb/dvb-usb/Kconfig b/drivers/media/dvb/dvb-usb/Kconfig
index 2f6973a..3e75fcd 100644 (file)
--- a/drivers/media/dvb/dvb-usb/Kconfig
+++ b/drivers/media/dvb/dvb-usb/Kconfig
@@ -28,6 +28,10 @@ config DVB_USB_V2
 
          Say Y if you own a USB DVB device.
 
+config DVB_USB_FIRMWARE
+       tristate "Firmware helper routines"
+       depends on DVB_USB
+
 config DVB_USB_DEBUG
        bool "Enable extended debug support for all DVB-USB devices"
        depends on DVB_USB

diff --git a/drivers/media/dvb/dvb-usb/Makefile b/drivers/media/dvb/dvb-usb/Makefile
index 3c73e7b..a0f5be2 100644 (file)
--- a/drivers/media/dvb/dvb-usb/Makefile
+++ b/drivers/media/dvb/dvb-usb/Makefile
@@ -4,6 +4,8 @@ obj-$(CONFIG_DVB_USB) += dvb-usb.o
 dvb_usbv2-objs = dvb_usb_init.o dvb_usb_urb.o dvb_usb_dvb.o dvb_usb_remote.o usb_urb.o
 obj-$(CONFIG_DVB_USB_V2) += dvb_usbv2.o
 
+obj-$(CONFIG_DVB_USB_FIRMWARE) += dvb_usb_firmware.o
+
 dvb-usb-vp7045-objs = vp7045.o vp7045-fe.o
 obj-$(CONFIG_DVB_USB_VP7045) += dvb-usb-vp7045.o
 

diff --git a/drivers/media/dvb/dvb-usb/dvb_usb_firmware.c b/drivers/media/dvb/dvb-usb/dvb_usb_firmware.c
new file mode 100644 (file)
index 0000000..61c3fe9
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/dvb_usb_firmware.c
@@ -0,0 +1,125 @@
+/* dvb_usb_firmware.c is part of the DVB USB library.
+ *
+ * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
+ * see dvb-usb-init.c for copyright information.
+ *
+ * This file contains functions for downloading the firmware to Cypress FX 1
+ * and 2 based devices.
+ *
+ */
+
+#include "dvb_usb.h"
+#include "dvb_usb_firmware.h"
+
+struct usb_cypress_controller {
+       u8 id;
+       const char *name;       /* name of the usb controller */
+       u16 cs_reg;             /* needs to be restarted,
+                                * when the firmware has been downloaded */
+};
+
+static const struct usb_cypress_controller cypress[] = {
+       { .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cs_reg = 0x7f92 },
+       { .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cs_reg = 0x7f92 },
+       { .id = CYPRESS_FX2,    .name = "Cypress FX2",    .cs_reg = 0xe600 },
+};
+
+/*
+ * load a firmware packet to the device
+ */
+static int usb_cypress_writemem(struct usb_device *udev, u16 addr, u8 *data,
+               u8 len)
+{
+       return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+                       0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5000);
+}
+
+int usbv2_cypress_load_firmware(struct usb_device *udev,
+               const struct firmware *fw, int type)
+{
+       struct hexline hx;
+       u8 reset;
+       int ret, pos = 0;
+
+       /* stop the CPU */
+       reset = 1;
+       ret = usb_cypress_writemem(udev, cypress[type].cs_reg, &reset, 1);
+       if (ret != 1)
+               pr_err("%s: could not stop the USB controller CPU",
+                               KBUILD_MODNAME);
+
+       while ((ret = dvb_usbv2_get_hexline(fw, &hx, &pos)) > 0) {
+               pr_debug("%s: writing to address %04x (buffer: %02x %02x)\n",
+                               __func__, hx.addr, hx.len, hx.chk);
+
+               ret = usb_cypress_writemem(udev, hx.addr, hx.data, hx.len);
+               if (ret != hx.len) {
+                       pr_err("%s: error while transferring firmware " \
+                                       "(transferred size=%d, block size=%d)",
+                                       KBUILD_MODNAME, ret, hx.len);
+                       ret = -EINVAL;
+                       break;
+               }
+       }
+       if (ret < 0) {
+               pr_err("%s: firmware download failed at %d with %d",
+                               KBUILD_MODNAME, pos, ret);
+               return ret;
+       }
+
+       if (ret == 0) {
+               /* restart the CPU */
+               reset = 0;
+               if (ret || usb_cypress_writemem(
+                               udev, cypress[type].cs_reg, &reset, 1) != 1) {
+                       pr_err("%s: could not restart the USB controller CPU",
+                                       KBUILD_MODNAME);
+                       ret = -EINVAL;
+               }
+       } else
+               ret = -EIO;
+
+       return ret;
+}
+EXPORT_SYMBOL(usbv2_cypress_load_firmware);
+
+int dvb_usbv2_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 = b[1] | (b[2] << 8);
+       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_usbv2_get_hexline);
+
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_DESCRIPTION("Cypress firmware download");
+MODULE_LICENSE("GPL");

diff --git a/drivers/media/dvb/dvb-usb/dvb_usb_firmware.h b/drivers/media/dvb/dvb-usb/dvb_usb_firmware.h
new file mode 100644 (file)
index 0000000..358d9d0
--- /dev/null
+++ b/drivers/media/dvb/dvb-usb/dvb_usb_firmware.h
@@ -0,0 +1,31 @@
+/* dvb_usb_firmware.c is part of the DVB USB library.
+ *
+ * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
+ * see dvb-usb-init.c for copyright information.
+ *
+ * This file contains functions for downloading the firmware to Cypress FX 1
+ * and 2 based devices.
+ *
+ */
+
+#ifndef DVB_USB_FIRMWARE_H
+#define DVB_USB_FIRMWARE_H
+
+#define CYPRESS_AN2135  0
+#define CYPRESS_AN2235  1
+#define CYPRESS_FX2     2
+
+/* commonly used firmware download types and function */
+struct hexline {
+       u8 len;
+       u32 addr;
+       u8 type;
+       u8 data[255];
+       u8 chk;
+};
+extern int usbv2_cypress_load_firmware(struct usb_device *,
+               const struct firmware *, int);
+extern int dvb_usbv2_get_hexline(const struct firmware *,
+               struct hexline *, int *);
+
+#endif