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Use const in PROGRAMMER function arguments where appropriate

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In order to get meaningful const properties for the PROGRAMMER, AVRPART and
AVRMEM arguments, some code needed to be moved around, otherwise a network of
"tainted" assignments risked rendering nothing const:

 - Change void (*enable)(PROGRAMMER *pgm) to void (*enable)(PROGRAMMER *pgm,
   const AVRPART *p); this allows changes in the PROGRAMMER structure after
   the part is known. For example, use TPI, UPDI, PDI functions in that
   programmer appropriate to the part. This used to be done later in the
   process, eg, in the initialize() function, which "taints" all other
   programmer functions wrt const and sometimes requires other finessing with
   flags etc. Much clearer with the modified enable() interface.

 - Move TPI initpgm-type code from initialize() to enable() --- note that
   initpgm() does not have the info at the time when it is called whether or
   not TPI is required

 - buspirate.c: move pgm->flag to PDATA(pgm)->flag (so legitimate
   modification of the flag does not change PROGRAMMER structure)

 - Move AVRPART_INIT_SMC and AVRPART_WRITE bits from the flags field in
   AVRPART to jtagmkII.c's private data flags32 fiels as FLAGS32_INIT_SMC and
   FLAGS32_WRITE bits

 - Move the xbeeResetPin component to private data in stk500.c as this is
   needed by xbee when it saddles on the stk500 code (previously, the flags
   component of the part was re-dedicated to this)

 - Change the way the "chained" private data are used in jtag3.c whilst
   keeping the PROGRAMMER structure read-only otherwise

 - In stk500v2.c move the STK600 pgm update from stk500v2_initialize() to
   stk500v2_enable() so the former keeps the PROGRAMMER structure read-only
   (for const assertion).

 - In usbasp change the code from changing PROGRAMMER functions late to
   dispatching to TPI or regular SPI protocol functions at runtime; reason
   being the decision whether to use TPI protocol is done at run-time
   depending on the capability of the attached programmer

Also fixes Issue #1071, the treatment of default eecr value.
This commit is contained in:
Stefan Rueger
2022-08-17 16:05:28 +01:00
parent dfef8bb0a8
commit c03f4a7925
85 changed files with 1582 additions and 2217 deletions
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11
src/usb_libusb.c
View File

@@ -62,8 +62,7 @@ static int usb_interface;
* The "baud" parameter is meaningless for USB devices, so we reuse it
* to pass the desired USB device ID.
*/
static int usbdev_open(char * port, union pinfo pinfo, union filedescriptor *fd)
{
static int usbdev_open(const char *port, union pinfo pinfo, union filedescriptor *fd) {
char string[256];
char product[256];
struct usb_bus *bus;
@@ -328,7 +327,7 @@ static void usbdev_close(union filedescriptor *fd)
}
static int usbdev_send(union filedescriptor *fd, const unsigned char *bp, size_t mlen)
static int usbdev_send(const union filedescriptor *fd, const unsigned char *bp, size_t mlen)
{
usb_dev_handle *udev = (usb_dev_handle *)fd->usb.handle;
int rv;
@@ -415,7 +414,7 @@ usb_fill_buf(usb_dev_handle *udev, int maxsize, int ep, int use_interrupt_xfer)
return 0;
}
static int usbdev_recv(union filedescriptor *fd, unsigned char *buf, size_t nbytes)
static int usbdev_recv(const union filedescriptor *fd, unsigned char *buf, size_t nbytes)
{
usb_dev_handle *udev = (usb_dev_handle *)fd->usb.handle;
int i, amnt;
@@ -470,7 +469,7 @@ static int usbdev_recv(union filedescriptor *fd, unsigned char *buf, size_t nbyt
*
* This is used for the AVRISP mkII device.
*/
static int usbdev_recv_frame(union filedescriptor *fd, unsigned char *buf, size_t nbytes)
static int usbdev_recv_frame(const union filedescriptor *fd, unsigned char *buf, size_t nbytes)
{
usb_dev_handle *udev = (usb_dev_handle *)fd->usb.handle;
int rv, n;
@@ -570,7 +569,7 @@ static int usbdev_recv_frame(union filedescriptor *fd, unsigned char *buf, size_
return n;
}
static int usbdev_drain(union filedescriptor *fd, int display)
static int usbdev_drain(const union filedescriptor *fd, int display)
{
/*
* There is not much point in trying to flush any data