diff options
| author | Wei-Ning Huang <wnhuang@google.com> | 2017-07-26 17:43:46 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2017-09-01 12:39:19 -0700 |
| commit | 235d9a18c14dbfccaa48dd344d88fb3ba4309052 (patch) | |
| tree | 9025147ec32937dbb40922c05320176d688fff8f /chip/stm32/usb_hid.c | |
| parent | 72252db3425a88f404f6d76eb15d02ace06747b7 (diff) | |
| download | chrome-ec-235d9a18c14dbfccaa48dd344d88fb3ba4309052.tar.gz | |
chip/stm32/usb_hid_keyboard: implement keyboard backlight control
Implement keyboard backlight control through HID output report. One
could enable CONFIG_USB_HID_KEYBOARD_BACKLIGHT to enable keyboard
backlight support for a given board. Target board must implement the
`void board_set_backlight(int brightness)` function in order correctly
set backlight.
BRANCH=none
BUG=b:37971411,b:63364143
TEST=with follow up CLs
1. `make BOARD=hammer -j`
2. `echo 10 > /sys/class/leds/hammer\:\:kbd_backlight/brightness`
console shows 'Keyboard backlight set to 10%'
Change-Id: Ibeff510a0d996ddebf61b54ed6b500b02c35564a
Signed-off-by: Wei-Ning Huang <wnhuang@google.com>
Reviewed-on: https://chromium-review.googlesource.com/586348
Commit-Ready: Wei-Ning Huang <wnhuang@chromium.org>
Tested-by: Wei-Ning Huang <wnhuang@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Diffstat (limited to 'chip/stm32/usb_hid.c')
| -rw-r--r-- | chip/stm32/usb_hid.c | 33 |
1 files changed, 24 insertions, 9 deletions
diff --git a/chip/stm32/usb_hid.c b/chip/stm32/usb_hid.c index 4a89d9573c..f24bdd5982 100644 --- a/chip/stm32/usb_hid.c +++ b/chip/stm32/usb_hid.c @@ -28,18 +28,33 @@ void hid_tx(int ep) STM32_USB_EP(ep) = (STM32_USB_EP(ep) & EP_MASK); } -void hid_reset(int ep, usb_uint *hid_ep_buf, int len) +void hid_reset(int ep, usb_uint *hid_ep_tx_buf, int tx_len, + usb_uint *hid_ep_rx_buf, int rx_len) { int i; - /* HID interrupt endpoint 1 */ - btable_ep[ep].tx_addr = usb_sram_addr(hid_ep_buf); - btable_ep[ep].tx_count = len; - for (i = 0; i < (len+1)/2; i++) - hid_ep_buf[i] = 0; - STM32_USB_EP(ep) = (ep << 0) /* Endpoint Address */ | - (3 << 4) /* TX Valid */ | + uint16_t ep_reg; + + btable_ep[ep].tx_addr = usb_sram_addr(hid_ep_tx_buf); + btable_ep[ep].tx_count = tx_len; + + /* STM32 USB SRAM needs to be accessed one U16 at a time */ + for (i = 0; i < DIV_ROUND_UP(tx_len, 2); i++) + hid_ep_tx_buf[i] = 0; + + ep_reg = (ep << 0) /* Endpoint Address */ | + EP_TX_VALID | (3 << 9) /* interrupt EP */ | - (0 << 12) /* RX Disabled */; + EP_RX_DISAB; + + /* Enable RX for output reports */ + if (hid_ep_rx_buf && rx_len > 0) { + btable_ep[ep].rx_addr = usb_sram_addr(hid_ep_rx_buf); + btable_ep[ep].rx_count = ((rx_len + 1) / 2) << 10; + + ep_reg |= EP_RX_VALID; /* RX Valid */ + } + + STM32_USB_EP(ep) = ep_reg; } /* |