Author: ian
Date: Thu Aug 6 19:29:26 2015
New Revision: 286382
URL: https://svnweb.freebsd.org/changeset/base/286382
Log:
Add support to the uftdi driver for reading and writing the serial eeprom
that can be attached to the chips, via ioctl() calls.
Modified:
head/sys/dev/usb/serial/uftdi.c
head/sys/dev/usb/serial/uftdi_reg.h
head/sys/dev/usb/uftdiio.h
Modified: head/sys/dev/usb/serial/uftdi.c
==============================================================================
--- head/sys/dev/usb/serial/uftdi.c Thu Aug 6 19:08:33 2015
(r286381)
+++ head/sys/dev/usb/serial/uftdi.c Thu Aug 6 19:29:26 2015
(r286382)
@@ -1791,6 +1791,82 @@ uftdi_set_error_char(struct ucom_softc *
}
static int
+uftdi_read_eeprom(struct ucom_softc *ucom, struct uftdi_eeio *eeio)
+{
+ struct uftdi_softc *sc = ucom->sc_parent;
+ usb_device_request_t req;
+ usb_error_t err;
+ uint16_t widx, wlength, woffset;
+
+ /* Offset and length must both be evenly divisible by two. */
+ if ((eeio->offset | eeio->length) & 0x01)
+ return (EINVAL);
+
+ woffset = eeio->offset / 2U;
+ wlength = eeio->length / 2U;
+ for (widx = 0; widx < wlength; widx++) {
+ req.bmRequestType = UT_READ_VENDOR_DEVICE;
+ req.bRequest = FTDI_SIO_READ_EEPROM;
+ USETW(req.wIndex, widx + woffset);
+ USETW(req.wLength, 2);
+ USETW(req.wValue, 0);
+ err = usbd_do_request(sc->sc_udev, &sc->sc_mtx, &req,
+ &eeio->data[widx]);
+ if (err != USB_ERR_NORMAL_COMPLETION)
+ return (err);
+ }
+ return (USB_ERR_NORMAL_COMPLETION);
+}
+
+static int
+uftdi_write_eeprom(struct ucom_softc *ucom, struct uftdi_eeio *eeio)
+{
+ struct uftdi_softc *sc = ucom->sc_parent;
+ usb_device_request_t req;
+ usb_error_t err;
+ uint16_t widx, wlength, woffset;
+
+ /* Offset and length must both be evenly divisible by two. */
+ if ((eeio->offset | eeio->length) & 0x01)
+ return (EINVAL);
+
+ woffset = eeio->offset / 2U;
+ wlength = eeio->length / 2U;
+ for (widx = 0; widx < wlength; widx++) {
+ req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
+ req.bRequest = FTDI_SIO_WRITE_EEPROM;
+ USETW(req.wIndex, widx + woffset);
+ USETW(req.wLength, 0);
+ USETW(req.wValue, eeio->data[widx]);
+ err = usbd_do_request(sc->sc_udev, &sc->sc_mtx, &req, NULL);
+ if (err != USB_ERR_NORMAL_COMPLETION)
+ return (err);
+ }
+ return (USB_ERR_NORMAL_COMPLETION);
+}
+
+static int
+uftdi_erase_eeprom(struct ucom_softc *ucom, int confirmation)
+{
+ struct uftdi_softc *sc = ucom->sc_parent;
+ usb_device_request_t req;
+ usb_error_t err;
+
+ /* Small effort to prevent accidental erasure. */
+ if (confirmation != UFTDI_CONFIRM_ERASE)
+ return (EINVAL);
+
+ req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
+ req.bRequest = FTDI_SIO_ERASE_EEPROM;
+ USETW(req.wIndex, 0);
+ USETW(req.wLength, 0);
+ USETW(req.wValue, 0);
+ err = usbd_do_request(sc->sc_udev, &sc->sc_mtx, &req, NULL);
+
+ return (err);
+}
+
+static int
uftdi_ioctl(struct ucom_softc *ucom, uint32_t cmd, caddr_t data,
int flag, struct thread *td)
{
@@ -1833,6 +1909,15 @@ uftdi_ioctl(struct ucom_softc *ucom, uin
*(int *)data = sc->sc_bcdDevice;
err = 0;
break;
+ case UFTDIIOC_READ_EEPROM:
+ err = uftdi_read_eeprom(ucom, (struct uftdi_eeio *)data);
+ break;
+ case UFTDIIOC_WRITE_EEPROM:
+ err = uftdi_write_eeprom(ucom, (struct uftdi_eeio *)data);
+ break;
+ case UFTDIIOC_ERASE_EEPROM:
+ err = uftdi_erase_eeprom(ucom, *(int *)data);
+ break;
default:
return (ENOIOCTL);
}
Modified: head/sys/dev/usb/serial/uftdi_reg.h
==============================================================================
--- head/sys/dev/usb/serial/uftdi_reg.h Thu Aug 6 19:08:33 2015
(r286381)
+++ head/sys/dev/usb/serial/uftdi_reg.h Thu Aug 6 19:29:26 2015
(r286382)
@@ -31,7 +31,10 @@
#define FTDI_SIO_SET_LATENCY 9 /* Set the latency timer */
#define FTDI_SIO_GET_LATENCY 10 /* Read the latency timer */
#define FTDI_SIO_SET_BITMODE 11 /* Set the bit bang I/O mode */
-#define FTDI_SIO_GET_BITMODE 12 /* Read pin states in bit bang
mode */
+#define FTDI_SIO_GET_BITMODE 12 /* Read pin states from any
mode */
+#define FTDI_SIO_READ_EEPROM 144 /* Read eeprom word */
+#define FTDI_SIO_WRITE_EEPROM 145 /* Write eeprom word */
+#define FTDI_SIO_ERASE_EEPROM 146 /* Erase entire eeprom */
/* Port Identifier Table */
#define FTDI_PIT_DEFAULT 0 /* SIOA */
Modified: head/sys/dev/usb/uftdiio.h
==============================================================================
--- head/sys/dev/usb/uftdiio.h Thu Aug 6 19:08:33 2015 (r286381)
+++ head/sys/dev/usb/uftdiio.h Thu Aug 6 19:29:26 2015 (r286382)
@@ -61,6 +61,26 @@ struct uftdi_bitmode
uint8_t iomask;
};
+/*
+ * For UFTDIIOC_READ_EEPROM, UFTDIIOC_WRITE_EEPROM:
+ *
+ * IO is done in 16-bit words at the chip level; offset and length are in
bytes,
+ * but must each be evenly divisible by two.
+ *
+ * It is not necessary to erase before writing. For the FT232R device (only)
+ * you must set the latency timer to 0x77 before doing a series of eeprom
writes
+ * (and restore it to the prior value when done).
+ */
+struct uftdi_eeio
+{
+ uint16_t offset;
+ uint16_t length;
+ uint16_t data[64];
+};
+
+/* Pass this value to confirm that eeprom erase request is not accidental. */
+#define UFTDI_CONFIRM_ERASE 0x26139108
+
#define UFTDIIOC_RESET_IO _IO('c', 0) /* Reset config, flush
fifos.*/
#define UFTDIIOC_RESET_RX _IO('c', 1) /* Flush input fifo. */
#define UFTDIIOC_RESET_TX _IO('c', 2) /* Flush output fifo. */
@@ -71,5 +91,8 @@ struct uftdi_bitmode
#define UFTDIIOC_SET_LATENCY _IOW('c', 7, int) /* 1-255 ms */
#define UFTDIIOC_GET_LATENCY _IOR('c', 8, int)
#define UFTDIIOC_GET_HWREV _IOR('c', 9, int)
+#define UFTDIIOC_READ_EEPROM _IOWR('c', 10, struct uftdi_eeio)
+#define UFTDIIOC_WRITE_EEPROM _IOW('c', 11, struct uftdi_eeio)
+#define UFTDIIOC_ERASE_EEPROM _IOW('c', 12, int)
#endif
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