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HID: wiimote: Allow direct eeprom access

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The wiimote provides direct access to parts of its eeprom. This implements read
support for small chunks of the eeprom. This isn't very fast but prevents the
reader from blocking the wiimote stream for too long.

Write support is not yet supported as the wiimote breaks if we overwrite its
memory. Use hidraw to reverse-engineer the eeprom before implementing write
support here.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
David Herrmann
2011-11-17 14:12:11 +01:00
committed by Jiri Kosina
parent 43e5e7c60e
commit 1d3452c63d
3 changed files with 85 additions and 8 deletions
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10
drivers/hid/hid-wiimote-core.c
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@@ -320,14 +320,8 @@ static void wiiproto_req_wmem(struct wiimote_data *wdata, bool eeprom,
wiimote_queue(wdata, cmd, sizeof(cmd));
}
#define wiiproto_req_rreg(wdata, os, sz) \
wiiproto_req_rmem((wdata), false, (os), (sz))
#define wiiproto_req_reeprom(wdata, os, sz) \
wiiproto_req_rmem((wdata), true, (os), (sz))
static void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom,
__u32 offset, __u16 size)
void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom, __u32 offset,
__u16 size)
{
__u8 cmd[7];