From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bin Meng Date: Thu, 12 Nov 2015 21:50:55 +0800 Subject: [U-Boot] [PATCH v3 09/12] input: Convert i8042 to driver model In-Reply-To: <1447261548-14304-10-git-send-email-sjg@chromium.org> References: <1447261548-14304-1-git-send-email-sjg@chromium.org> <1447261548-14304-10-git-send-email-sjg@chromium.org> Message-ID: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Thu, Nov 12, 2015 at 1:05 AM, Simon Glass wrote: > Adjust this driver to support driver model. The only users are x86 boards > so this should be safe. > > Signed-off-by: Simon Glass > --- > Reviewed-by: Bin Meng Tested-by: Bin Meng > Changes in v3: None > Changes in v2: None > > drivers/input/Makefile | 2 +- > drivers/input/i8042.c | 109 ++++++++++++++++++++++++++++++++++--------------- > include/i8042.h | 6 --- > 3 files changed, 76 insertions(+), 41 deletions(-) > > diff --git a/drivers/input/Makefile b/drivers/input/Makefile > index 9388dfe..5f15265 100644 > --- a/drivers/input/Makefile > +++ b/drivers/input/Makefile > @@ -7,7 +7,7 @@ > > obj-$(CONFIG_DM_KEYBOARD) += keyboard-uclass.o > > -obj-$(CONFIG_I8042_KBD) += i8042.o > +obj-$(CONFIG_I8042_KEYB) += i8042.o > obj-$(CONFIG_TEGRA_KEYBOARD) += tegra-kbc.o > obj-$(CONFIG_TWL4030_INPUT) += twl4030.o > obj-$(CONFIG_CROS_EC_KEYB) += cros_ec_keyb.o > diff --git a/drivers/input/i8042.c b/drivers/input/i8042.c > index 270805b..e5e2926 100644 > --- a/drivers/input/i8042.c > +++ b/drivers/input/i8042.c > @@ -8,8 +8,11 @@ > /* i8042.c - Intel 8042 keyboard driver routines */ > > #include > +#include > +#include > #include > #include > +#include > #include > > /* defines */ > @@ -17,8 +20,9 @@ > #define out8(p, v) outb(v, p) > > /* locals */ > -static struct input_config config; > -static bool extended; > +struct i8042_kbd_priv { > + bool extended; /* true if an extended keycode is expected next */ > +}; > > static unsigned char ext_key_map[] = { > 0x1c, /* keypad enter */ > @@ -60,12 +64,20 @@ static int kbd_output_full(void) > return kbd_timeout != -1; > } > > -static void kbd_led_set(int flags) > +/** > + * check_leds() - Check the keyboard LEDs and update them it needed > + * > + * @ret: Value to return > + * @return value of @ret > + */ > +static int i8042_kbd_update_leds(struct udevice *dev, int leds) > { > kbd_input_empty(); > out8(I8042_DATA_REG, CMD_SET_KBD_LED); > kbd_input_empty(); > - out8(I8042_DATA_REG, flags & 0x7); > + out8(I8042_DATA_REG, leds & 0x7); > + > + return 0; > } > > static int kbd_write(int reg, int value) > @@ -144,6 +156,8 @@ static int kbd_controller_present(void) > /* > * Implement a weak default function for boards that optionally > * need to skip the i8042 initialization. > + * > + * TODO(sjg at chromium.org): Use device tree for this? > */ > int __weak board_i8042_skip(void) > { > @@ -190,6 +204,8 @@ int i8042_disable(void) > > static int i8042_kbd_check(struct input_config *input) > { > + struct i8042_kbd_priv *priv = dev_get_priv(input->dev); > + > if ((in8(I8042_STS_REG) & STATUS_OBF) == 0) { > return 0; > } else { > @@ -201,15 +217,15 @@ static int i8042_kbd_check(struct input_config *input) > if (scan_code == 0xfa) { > return 0; > } else if (scan_code == 0xe0) { > - extended = true; > + priv->extended = true; > return 0; > } > if (scan_code & 0x80) { > scan_code &= 0x7f; > release = true; > } > - if (extended) { > - extended = false; > + if (priv->extended) { > + priv->extended = false; > for (i = 0; ext_key_map[i]; i++) { > if (ext_key_map[i] == scan_code) { > scan_code = 0x60 + i; > @@ -221,21 +237,23 @@ static int i8042_kbd_check(struct input_config *input) > return 0; > } > > - input_add_keycode(&config, scan_code, release); > + input_add_keycode(input, scan_code, release); > return 1; > } > } > > /* i8042_kbd_init - reset keyboard and init state flags */ > -int i8042_kbd_init(void) > +static int i8042_start(struct udevice *dev) > { > + struct keyboard_priv *uc_priv = dev_get_uclass_priv(dev); > + struct input_config *input = &uc_priv->input; > int keymap, try; > char *penv; > int ret; > > if (!kbd_controller_present() || board_i8042_skip()) { > debug("i8042 keyboard controller is not present\n"); > - return -1; > + return -ENOENT; > } > > /* Init keyboard device (default US layout) */ > @@ -251,42 +269,65 @@ int i8042_kbd_init(void) > return -1; > } > > - ret = input_init(&config, keymap == KBD_GER); > + ret = input_add_tables(input, keymap == KBD_GER); > if (ret) > return ret; > - config.read_keys = i8042_kbd_check; > - input_allow_repeats(&config, true); > > - kbd_led_set(NORMAL); > + i8042_kbd_update_leds(dev, NORMAL); > + debug("%s: started\n", __func__); > > return 0; > } > > /** > - * check_leds() - Check the keyboard LEDs and update them it needed > + * Set up the i8042 keyboard. This is called by the stdio device handler > * > - * @ret: Value to return > - * @return value of @ret > + * We want to do this init when the keyboard is actually used rather than > + * at start-up, since keyboard input may not currently be selected. > + * > + * Once the keyboard starts there will be a period during which we must > + * wait for the keyboard to init. We do this only when a key is first > + * read - see kbd_wait_for_fifo_init(). > + * > + * @return 0 if ok, -ve on error > */ > -static int check_leds(int ret) > +static int i8042_kbd_probe(struct udevice *dev) > { > - int leds; > - > - leds = input_leds_changed(&config); > - if (leds >= 0) > - kbd_led_set(leds); > + struct keyboard_priv *uc_priv = dev_get_uclass_priv(dev); > + struct stdio_dev *sdev = &uc_priv->sdev; > + struct input_config *input = &uc_priv->input; > + int ret; > > - return ret; > -} > + /* Register the device. i8042_start() will be called soon */ > + input->dev = dev; > + input->read_keys = i8042_kbd_check; > + input_allow_repeats(input, true); > + strcpy(sdev->name, "i8042-kbd"); > + ret = input_stdio_register(sdev); > + if (ret) { > + debug("%s: input_stdio_register() failed\n", __func__); > + return ret; > + } > + debug("%s: ready\n", __func__); > > -/* i8042_tstc - test if keyboard input is available */ > -int i8042_tstc(struct stdio_dev *dev) > -{ > - return check_leds(input_tstc(&config)); > + return 0; > } > > -/* i8042_getc - wait till keyboard input is available */ > -int i8042_getc(struct stdio_dev *dev) > -{ > - return check_leds(input_getc(&config)); > -} > +static const struct keyboard_ops i8042_kbd_ops = { > + .start = i8042_start, > + .update_leds = i8042_kbd_update_leds, > +}; > + > +static const struct udevice_id i8042_kbd_ids[] = { > + { .compatible = "intel,i8042-keyboard" }, > + { } > +}; > + > +U_BOOT_DRIVER(i8042_kbd) = { > + .name = "i8042_kbd", > + .id = UCLASS_KEYBOARD, > + .of_match = i8042_kbd_ids, > + .probe = i8042_kbd_probe, > + .ops = &i8042_kbd_ops, > + .priv_auto_alloc_size = sizeof(struct i8042_kbd_priv), > +}; > diff --git a/include/i8042.h b/include/i8042.h > index e0afce1..9723b6a 100644 > --- a/include/i8042.h > +++ b/include/i8042.h > @@ -87,10 +87,4 @@ void i8042_flush(void); > */ > int i8042_disable(void); > > -struct stdio_dev; > - > -int i8042_kbd_init(void); > -int i8042_tstc(struct stdio_dev *dev); > -int i8042_getc(struct stdio_dev *dev); > - > #endif /* _I8042_H_ */ > -- > 2.6.0.rc2.230.g3dd15c0 >