mirror of https://github.com/hak5/openwrt-owl.git
895 lines
24 KiB
Diff
895 lines
24 KiB
Diff
From 910b89499e2db97931afa64b0db1b7d7640af3db Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <pelwell@users.noreply.github.com>
|
|
Date: Tue, 14 Jul 2015 14:32:47 +0100
|
|
Subject: [PATCH 122/148] Merge pull request #1043 from XECDesign/sense-4.0
|
|
|
|
mfd: Add Raspberry Pi Sense HAT core driver
|
|
---
|
|
arch/arm/boot/dts/overlays/Makefile | 1 +
|
|
arch/arm/boot/dts/overlays/README | 6 +
|
|
arch/arm/boot/dts/overlays/rpi-sense-overlay.dts | 47 +++++
|
|
arch/arm/configs/bcm2709_defconfig | 2 +
|
|
arch/arm/configs/bcmrpi_defconfig | 2 +
|
|
drivers/input/joystick/Kconfig | 8 +
|
|
drivers/input/joystick/Makefile | 1 +
|
|
drivers/input/joystick/rpisense-js.c | 153 +++++++++++++++
|
|
drivers/mfd/Kconfig | 8 +
|
|
drivers/mfd/Makefile | 2 +
|
|
drivers/mfd/rpisense-core.c | 157 +++++++++++++++
|
|
drivers/video/fbdev/Kconfig | 13 ++
|
|
drivers/video/fbdev/Makefile | 1 +
|
|
drivers/video/fbdev/rpisense-fb.c | 235 +++++++++++++++++++++++
|
|
include/linux/mfd/rpisense/core.h | 47 +++++
|
|
include/linux/mfd/rpisense/framebuffer.h | 28 +++
|
|
include/linux/mfd/rpisense/joystick.h | 35 ++++
|
|
17 files changed, 746 insertions(+)
|
|
create mode 100644 arch/arm/boot/dts/overlays/rpi-sense-overlay.dts
|
|
create mode 100644 drivers/input/joystick/rpisense-js.c
|
|
create mode 100644 drivers/mfd/rpisense-core.c
|
|
create mode 100644 drivers/video/fbdev/rpisense-fb.c
|
|
create mode 100644 include/linux/mfd/rpisense/core.h
|
|
create mode 100644 include/linux/mfd/rpisense/framebuffer.h
|
|
create mode 100644 include/linux/mfd/rpisense/joystick.h
|
|
|
|
--- a/arch/arm/boot/dts/overlays/Makefile
|
|
+++ b/arch/arm/boot/dts/overlays/Makefile
|
|
@@ -39,6 +39,7 @@ dtb-$(RPI_DT_OVERLAYS) += rpi-dac-overla
|
|
dtb-$(RPI_DT_OVERLAYS) += rpi-display-overlay.dtb
|
|
dtb-$(RPI_DT_OVERLAYS) += rpi-ft5406-overlay.dtb
|
|
dtb-$(RPI_DT_OVERLAYS) += rpi-proto-overlay.dtb
|
|
+dtb-$(RPI_DT_OVERLAYS) += rpi-sense-overlay.dtb
|
|
dtb-$(RPI_DT_OVERLAYS) += sdhost-overlay.dtb
|
|
dtb-$(RPI_DT_OVERLAYS) += spi-bcm2708-overlay.dtb
|
|
dtb-$(RPI_DT_OVERLAYS) += spi-bcm2835-overlay.dtb
|
|
--- a/arch/arm/boot/dts/overlays/README
|
|
+++ b/arch/arm/boot/dts/overlays/README
|
|
@@ -442,6 +442,12 @@ Load: dtoverlay=rpi-proto
|
|
Params: <None>
|
|
|
|
|
|
+Name: rpi-sense
|
|
+Info: Raspberry Pi Sense HAT
|
|
+Load: dtoverlay=rpi-sense
|
|
+Params: <None>
|
|
+
|
|
+
|
|
Name: sdhost
|
|
Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock
|
|
Load: dtoverlay=sdhost,<param>=<val>
|
|
--- /dev/null
|
|
+++ b/arch/arm/boot/dts/overlays/rpi-sense-overlay.dts
|
|
@@ -0,0 +1,47 @@
|
|
+// rpi-sense HAT
|
|
+/dts-v1/;
|
|
+/plugin/;
|
|
+
|
|
+/ {
|
|
+ compatible = "brcm,bcm2708", "brcm,bcm2709";
|
|
+
|
|
+ fragment@0 {
|
|
+ target = <&i2c1>;
|
|
+ __overlay__ {
|
|
+ #address-cells = <1>;
|
|
+ #size-cells = <0>;
|
|
+ status = "okay";
|
|
+
|
|
+ rpi-sense@46 {
|
|
+ compatible = "rpi,rpi-sense";
|
|
+ reg = <0x46>;
|
|
+ keys-int-gpios = <&gpio 23 1>;
|
|
+ status = "okay";
|
|
+ };
|
|
+
|
|
+ lsm9ds1-magn@1c {
|
|
+ compatible = "st,lsm9ds1-magn";
|
|
+ reg = <0x1c>;
|
|
+ status = "okay";
|
|
+ };
|
|
+
|
|
+ lsm9ds1-accel6a {
|
|
+ compatible = "st,lsm9ds1-accel";
|
|
+ reg = <0x6a>;
|
|
+ status = "okay";
|
|
+ };
|
|
+
|
|
+ lps25h-press@5c {
|
|
+ compatible = "st,lps25h-press";
|
|
+ reg = <0x5c>;
|
|
+ status = "okay";
|
|
+ };
|
|
+
|
|
+ hts221-humid@5f {
|
|
+ compatible = "st,hts221-humid";
|
|
+ reg = <0x5f>;
|
|
+ status = "okay";
|
|
+ };
|
|
+ };
|
|
+ };
|
|
+};
|
|
--- a/arch/arm/configs/bcm2709_defconfig
|
|
+++ b/arch/arm/configs/bcm2709_defconfig
|
|
@@ -533,6 +533,7 @@ CONFIG_JOYSTICK_IFORCE=m
|
|
CONFIG_JOYSTICK_IFORCE_USB=y
|
|
CONFIG_JOYSTICK_XPAD=m
|
|
CONFIG_JOYSTICK_XPAD_FF=y
|
|
+CONFIG_JOYSTICK_RPISENSE=m
|
|
CONFIG_INPUT_TOUCHSCREEN=y
|
|
CONFIG_TOUCHSCREEN_ADS7846=m
|
|
CONFIG_TOUCHSCREEN_EGALAX=m
|
|
@@ -789,6 +790,7 @@ CONFIG_VIDEO_MT9V011=m
|
|
CONFIG_FB=y
|
|
CONFIG_FB_BCM2708=y
|
|
CONFIG_FB_SSD1307=m
|
|
+CONFIG_FB_RPISENSE=m
|
|
# CONFIG_BACKLIGHT_GENERIC is not set
|
|
CONFIG_BACKLIGHT_GPIO=m
|
|
CONFIG_FRAMEBUFFER_CONSOLE=y
|
|
--- a/arch/arm/configs/bcmrpi_defconfig
|
|
+++ b/arch/arm/configs/bcmrpi_defconfig
|
|
@@ -526,6 +526,7 @@ CONFIG_JOYSTICK_IFORCE=m
|
|
CONFIG_JOYSTICK_IFORCE_USB=y
|
|
CONFIG_JOYSTICK_XPAD=m
|
|
CONFIG_JOYSTICK_XPAD_FF=y
|
|
+CONFIG_JOYSTICK_RPISENSE=m
|
|
CONFIG_INPUT_TOUCHSCREEN=y
|
|
CONFIG_TOUCHSCREEN_ADS7846=m
|
|
CONFIG_TOUCHSCREEN_EGALAX=m
|
|
@@ -782,6 +783,7 @@ CONFIG_VIDEO_MT9V011=m
|
|
CONFIG_FB=y
|
|
CONFIG_FB_BCM2708=y
|
|
CONFIG_FB_SSD1307=m
|
|
+CONFIG_FB_RPISENSE=m
|
|
# CONFIG_BACKLIGHT_GENERIC is not set
|
|
CONFIG_BACKLIGHT_GPIO=m
|
|
CONFIG_FRAMEBUFFER_CONSOLE=y
|
|
--- a/drivers/input/joystick/Kconfig
|
|
+++ b/drivers/input/joystick/Kconfig
|
|
@@ -329,4 +329,12 @@ config JOYSTICK_MAPLE
|
|
To compile this as a module choose M here: the module will be called
|
|
maplecontrol.
|
|
|
|
+config JOYSTICK_RPISENSE
|
|
+ tristate "Raspberry Pi Sense HAT joystick"
|
|
+ depends on GPIOLIB && INPUT
|
|
+ select MFD_RPISENSE_CORE
|
|
+
|
|
+ help
|
|
+ This is the joystick driver for the Raspberry Pi Sense HAT
|
|
+
|
|
endif
|
|
--- a/drivers/input/joystick/Makefile
|
|
+++ b/drivers/input/joystick/Makefile
|
|
@@ -32,4 +32,5 @@ obj-$(CONFIG_JOYSTICK_WARRIOR) += warri
|
|
obj-$(CONFIG_JOYSTICK_XPAD) += xpad.o
|
|
obj-$(CONFIG_JOYSTICK_ZHENHUA) += zhenhua.o
|
|
obj-$(CONFIG_JOYSTICK_WALKERA0701) += walkera0701.o
|
|
+obj-$(CONFIG_JOYSTICK_RPISENSE) += rpisense-js.o
|
|
|
|
--- /dev/null
|
|
+++ b/drivers/input/joystick/rpisense-js.c
|
|
@@ -0,0 +1,153 @@
|
|
+/*
|
|
+ * Raspberry Pi Sense HAT joystick driver
|
|
+ * http://raspberrypi.org
|
|
+ *
|
|
+ * Copyright (C) 2015 Raspberry Pi
|
|
+ *
|
|
+ * Author: Serge Schneider
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
+ * option) any later version.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#include <linux/module.h>
|
|
+
|
|
+#include <linux/mfd/rpisense/joystick.h>
|
|
+#include <linux/mfd/rpisense/core.h>
|
|
+
|
|
+struct rpisense *rpisense;
|
|
+unsigned char keymap[5] = {KEY_DOWN, KEY_RIGHT, KEY_UP, KEY_ENTER, KEY_LEFT,};
|
|
+
|
|
+static void keys_work_fn(struct work_struct *work)
|
|
+{
|
|
+ int i;
|
|
+ static s32 prev_keys;
|
|
+ struct rpisense_js *rpisense_js = &rpisense->joystick;
|
|
+ s32 keys = rpisense_reg_read(rpisense, RPISENSE_KEYS);
|
|
+ s32 changes = keys ^ prev_keys;
|
|
+
|
|
+ prev_keys = keys;
|
|
+ for (i = 0; i < 5; i++) {
|
|
+ if (changes & 1) {
|
|
+ input_report_key(rpisense_js->keys_dev,
|
|
+ keymap[i], keys & 1);
|
|
+ }
|
|
+ changes >>= 1;
|
|
+ keys >>= 1;
|
|
+ }
|
|
+ input_sync(rpisense_js->keys_dev);
|
|
+}
|
|
+
|
|
+static irqreturn_t keys_irq_handler(int irq, void *pdev)
|
|
+{
|
|
+ struct rpisense_js *rpisense_js = &rpisense->joystick;
|
|
+
|
|
+ schedule_work(&rpisense_js->keys_work_s);
|
|
+ return IRQ_HANDLED;
|
|
+}
|
|
+
|
|
+static int rpisense_js_probe(struct platform_device *pdev)
|
|
+{
|
|
+ int ret;
|
|
+ int i;
|
|
+ struct rpisense_js *rpisense_js;
|
|
+
|
|
+ rpisense = rpisense_get_dev();
|
|
+ rpisense_js = &rpisense->joystick;
|
|
+
|
|
+ INIT_WORK(&rpisense_js->keys_work_s, keys_work_fn);
|
|
+
|
|
+ rpisense_js->keys_dev = input_allocate_device();
|
|
+ if (!rpisense_js->keys_dev) {
|
|
+ dev_err(&pdev->dev, "Could not allocate input device.\n");
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ rpisense_js->keys_dev->evbit[0] = BIT_MASK(EV_KEY);
|
|
+ for (i = 0; i < ARRAY_SIZE(keymap); i++) {
|
|
+ set_bit(keymap[i],
|
|
+ rpisense_js->keys_dev->keybit);
|
|
+ }
|
|
+
|
|
+ rpisense_js->keys_dev->name = "Raspberry Pi Sense HAT Joystick";
|
|
+ rpisense_js->keys_dev->phys = "rpi-sense-joy/input0";
|
|
+ rpisense_js->keys_dev->id.bustype = BUS_I2C;
|
|
+ rpisense_js->keys_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
|
|
+ rpisense_js->keys_dev->keycode = keymap;
|
|
+ rpisense_js->keys_dev->keycodesize = sizeof(unsigned char);
|
|
+ rpisense_js->keys_dev->keycodemax = ARRAY_SIZE(keymap);
|
|
+
|
|
+ ret = input_register_device(rpisense_js->keys_dev);
|
|
+ if (ret) {
|
|
+ dev_err(&pdev->dev, "Could not register input device.\n");
|
|
+ goto err_keys_alloc;
|
|
+ }
|
|
+
|
|
+ ret = gpiod_direction_input(rpisense_js->keys_desc);
|
|
+ if (ret) {
|
|
+ dev_err(&pdev->dev, "Could not set keys-int direction.\n");
|
|
+ goto err_keys_reg;
|
|
+ }
|
|
+
|
|
+ rpisense_js->keys_irq = gpiod_to_irq(rpisense_js->keys_desc);
|
|
+ if (rpisense_js->keys_irq < 0) {
|
|
+ dev_err(&pdev->dev, "Could not determine keys-int IRQ.\n");
|
|
+ ret = rpisense_js->keys_irq;
|
|
+ goto err_keys_reg;
|
|
+ }
|
|
+
|
|
+ ret = devm_request_irq(&pdev->dev, rpisense_js->keys_irq,
|
|
+ keys_irq_handler, IRQF_TRIGGER_RISING,
|
|
+ "keys", &pdev->dev);
|
|
+ if (ret) {
|
|
+ dev_err(&pdev->dev, "IRQ request failed.\n");
|
|
+ goto err_keys_reg;
|
|
+ }
|
|
+ return 0;
|
|
+err_keys_reg:
|
|
+ input_unregister_device(rpisense_js->keys_dev);
|
|
+err_keys_alloc:
|
|
+ input_free_device(rpisense_js->keys_dev);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static int rpisense_js_remove(struct platform_device *pdev)
|
|
+{
|
|
+ struct rpisense_js *rpisense_js = &rpisense->joystick;
|
|
+
|
|
+ input_unregister_device(rpisense_js->keys_dev);
|
|
+ input_free_device(rpisense_js->keys_dev);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+#ifdef CONFIG_OF
|
|
+static const struct of_device_id rpisense_js_id[] = {
|
|
+ { .compatible = "rpi,rpi-sense-js" },
|
|
+ { },
|
|
+};
|
|
+MODULE_DEVICE_TABLE(of, rpisense_js_id);
|
|
+#endif
|
|
+
|
|
+static struct platform_device_id rpisense_js_device_id[] = {
|
|
+ { .name = "rpi-sense-js" },
|
|
+ { },
|
|
+};
|
|
+MODULE_DEVICE_TABLE(platform, rpisense_js_device_id);
|
|
+
|
|
+static struct platform_driver rpisense_js_driver = {
|
|
+ .probe = rpisense_js_probe,
|
|
+ .remove = rpisense_js_remove,
|
|
+ .driver = {
|
|
+ .name = "rpi-sense-js",
|
|
+ .owner = THIS_MODULE,
|
|
+ },
|
|
+};
|
|
+
|
|
+module_platform_driver(rpisense_js_driver);
|
|
+
|
|
+MODULE_DESCRIPTION("Raspberry Pi Sense HAT joystick driver");
|
|
+MODULE_AUTHOR("Serge Schneider <serge@raspberrypi.org>");
|
|
+MODULE_LICENSE("GPL");
|
|
--- a/drivers/mfd/Kconfig
|
|
+++ b/drivers/mfd/Kconfig
|
|
@@ -10,6 +10,14 @@ config MFD_CORE
|
|
select IRQ_DOMAIN
|
|
default n
|
|
|
|
+config MFD_RPISENSE_CORE
|
|
+ tristate "Raspberry Pi Sense HAT core functions"
|
|
+ depends on I2C
|
|
+ select MFD_CORE
|
|
+ help
|
|
+ This is the core driver for the Raspberry Pi Sense HAT. This provides
|
|
+ the necessary functions to communicate with the hardware.
|
|
+
|
|
config MFD_CS5535
|
|
tristate "AMD CS5535 and CS5536 southbridge core functions"
|
|
select MFD_CORE
|
|
--- a/drivers/mfd/Makefile
|
|
+++ b/drivers/mfd/Makefile
|
|
@@ -185,3 +185,5 @@ obj-$(CONFIG_MFD_SKY81452) += sky81452.o
|
|
intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o
|
|
obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o
|
|
obj-$(CONFIG_MFD_MT6397) += mt6397-core.o
|
|
+
|
|
+obj-$(CONFIG_MFD_RPISENSE_CORE) += rpisense-core.o
|
|
--- /dev/null
|
|
+++ b/drivers/mfd/rpisense-core.c
|
|
@@ -0,0 +1,157 @@
|
|
+/*
|
|
+ * Raspberry Pi Sense HAT core driver
|
|
+ * http://raspberrypi.org
|
|
+ *
|
|
+ * Copyright (C) 2015 Raspberry Pi
|
|
+ *
|
|
+ * Author: Serge Schneider
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
+ * option) any later version.
|
|
+ *
|
|
+ * This driver is based on wm8350 implementation.
|
|
+ */
|
|
+
|
|
+#include <linux/module.h>
|
|
+#include <linux/moduleparam.h>
|
|
+#include <linux/err.h>
|
|
+#include <linux/init.h>
|
|
+#include <linux/i2c.h>
|
|
+#include <linux/platform_device.h>
|
|
+#include <linux/mfd/rpisense/core.h>
|
|
+#include <linux/slab.h>
|
|
+
|
|
+struct rpisense *rpisense;
|
|
+
|
|
+static void rpisense_client_dev_register(struct rpisense *rpisense,
|
|
+ const char *name,
|
|
+ struct platform_device **pdev)
|
|
+{
|
|
+ int ret;
|
|
+
|
|
+ *pdev = platform_device_alloc(name, -1);
|
|
+ if (*pdev == NULL) {
|
|
+ dev_err(rpisense->dev, "Failed to allocate %s\n", name);
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ (*pdev)->dev.parent = rpisense->dev;
|
|
+ platform_set_drvdata(*pdev, rpisense);
|
|
+ ret = platform_device_add(*pdev);
|
|
+ if (ret != 0) {
|
|
+ dev_err(rpisense->dev, "Failed to register %s: %d\n",
|
|
+ name, ret);
|
|
+ platform_device_put(*pdev);
|
|
+ *pdev = NULL;
|
|
+ }
|
|
+}
|
|
+
|
|
+static int rpisense_probe(struct i2c_client *i2c,
|
|
+ const struct i2c_device_id *id)
|
|
+{
|
|
+ int ret;
|
|
+ struct rpisense_js *rpisense_js;
|
|
+
|
|
+ rpisense = devm_kzalloc(&i2c->dev, sizeof(struct rpisense), GFP_KERNEL);
|
|
+ if (rpisense == NULL)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ i2c_set_clientdata(i2c, rpisense);
|
|
+ rpisense->dev = &i2c->dev;
|
|
+ rpisense->i2c_client = i2c;
|
|
+
|
|
+ ret = rpisense_reg_read(rpisense, RPISENSE_WAI);
|
|
+ if (ret > 0) {
|
|
+ if (ret != 's')
|
|
+ return -EINVAL;
|
|
+ } else {
|
|
+ return ret;
|
|
+ }
|
|
+ ret = rpisense_reg_read(rpisense, RPISENSE_VER);
|
|
+ if (ret < 0)
|
|
+ return ret;
|
|
+
|
|
+ dev_info(rpisense->dev,
|
|
+ "Raspberry Pi Sense HAT firmware version %i\n", ret);
|
|
+
|
|
+ rpisense_js = &rpisense->joystick;
|
|
+ rpisense_js->keys_desc = devm_gpiod_get(&i2c->dev,
|
|
+ "keys-int", GPIOD_IN);
|
|
+ if (IS_ERR(rpisense_js->keys_desc)) {
|
|
+ dev_warn(&i2c->dev, "Failed to get keys-int descriptor.\n");
|
|
+ rpisense_js->keys_desc = gpio_to_desc(23);
|
|
+ if (rpisense_js->keys_desc == NULL) {
|
|
+ dev_err(&i2c->dev, "GPIO23 fallback failed.\n");
|
|
+ return PTR_ERR(rpisense_js->keys_desc);
|
|
+ }
|
|
+ }
|
|
+ rpisense_client_dev_register(rpisense, "rpi-sense-js",
|
|
+ &(rpisense->joystick.pdev));
|
|
+ rpisense_client_dev_register(rpisense, "rpi-sense-fb",
|
|
+ &(rpisense->framebuffer.pdev));
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int rpisense_remove(struct i2c_client *i2c)
|
|
+{
|
|
+ struct rpisense *rpisense = i2c_get_clientdata(i2c);
|
|
+
|
|
+ platform_device_unregister(rpisense->joystick.pdev);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+struct rpisense *rpisense_get_dev(void)
|
|
+{
|
|
+ return rpisense;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(rpisense_get_dev);
|
|
+
|
|
+s32 rpisense_reg_read(struct rpisense *rpisense, int reg)
|
|
+{
|
|
+ int ret = i2c_smbus_read_byte_data(rpisense->i2c_client, reg);
|
|
+
|
|
+ if (ret < 0)
|
|
+ dev_err(rpisense->dev, "Read from reg %d failed\n", reg);
|
|
+ /* Due to the BCM270x I2C clock stretching bug, some values
|
|
+ * may have MSB set. Clear it to avoid incorrect values.
|
|
+ * */
|
|
+ return ret & 0x7F;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(rpisense_reg_read);
|
|
+
|
|
+int rpisense_block_write(struct rpisense *rpisense, const char *buf, int count)
|
|
+{
|
|
+ int ret = i2c_master_send(rpisense->i2c_client, buf, count);
|
|
+
|
|
+ if (ret < 0)
|
|
+ dev_err(rpisense->dev, "Block write failed\n");
|
|
+ return ret;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(rpisense_block_write);
|
|
+
|
|
+static const struct i2c_device_id rpisense_i2c_id[] = {
|
|
+ { "rpi-sense", 0 },
|
|
+ { }
|
|
+};
|
|
+MODULE_DEVICE_TABLE(i2c, rpisense_i2c_id);
|
|
+
|
|
+
|
|
+static struct i2c_driver rpisense_driver = {
|
|
+ .driver = {
|
|
+ .name = "rpi-sense",
|
|
+ .owner = THIS_MODULE,
|
|
+ },
|
|
+ .probe = rpisense_probe,
|
|
+ .remove = rpisense_remove,
|
|
+ .id_table = rpisense_i2c_id,
|
|
+};
|
|
+
|
|
+module_i2c_driver(rpisense_driver);
|
|
+
|
|
+MODULE_DESCRIPTION("Raspberry Pi Sense HAT core driver");
|
|
+MODULE_AUTHOR("Serge Schneider <serge@raspberrypi.org>");
|
|
+MODULE_LICENSE("GPL");
|
|
+
|
|
--- a/drivers/video/fbdev/Kconfig
|
|
+++ b/drivers/video/fbdev/Kconfig
|
|
@@ -2495,3 +2495,16 @@ config FB_SSD1307
|
|
help
|
|
This driver implements support for the Solomon SSD1307
|
|
OLED controller over I2C.
|
|
+
|
|
+config FB_RPISENSE
|
|
+ tristate "Raspberry Pi Sense HAT framebuffer"
|
|
+ depends on FB
|
|
+ select MFD_RPISENSE_CORE
|
|
+ select FB_SYS_FOPS
|
|
+ select FB_SYS_FILLRECT
|
|
+ select FB_SYS_COPYAREA
|
|
+ select FB_SYS_IMAGEBLIT
|
|
+ select FB_DEFERRED_IO
|
|
+
|
|
+ help
|
|
+ This is the framebuffer driver for the Raspberry Pi Sense HAT
|
|
--- a/drivers/video/fbdev/Makefile
|
|
+++ b/drivers/video/fbdev/Makefile
|
|
@@ -150,6 +150,7 @@ obj-$(CONFIG_FB_DA8XX) += da8xx-fb.o
|
|
obj-$(CONFIG_FB_MXS) += mxsfb.o
|
|
obj-$(CONFIG_FB_SSD1307) += ssd1307fb.o
|
|
obj-$(CONFIG_FB_SIMPLE) += simplefb.o
|
|
+obj-$(CONFIG_FB_RPISENSE) += rpisense-fb.o
|
|
|
|
# the test framebuffer is last
|
|
obj-$(CONFIG_FB_VIRTUAL) += vfb.o
|
|
--- /dev/null
|
|
+++ b/drivers/video/fbdev/rpisense-fb.c
|
|
@@ -0,0 +1,235 @@
|
|
+/*
|
|
+ * Raspberry Pi Sense HAT framebuffer driver
|
|
+ * http://raspberrypi.org
|
|
+ *
|
|
+ * Copyright (C) 2015 Raspberry Pi
|
|
+ *
|
|
+ * Author: Serge Schneider
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
+ * option) any later version.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#include <linux/module.h>
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/errno.h>
|
|
+#include <linux/string.h>
|
|
+#include <linux/mm.h>
|
|
+#include <linux/slab.h>
|
|
+#include <linux/delay.h>
|
|
+#include <linux/fb.h>
|
|
+#include <linux/init.h>
|
|
+
|
|
+#include <linux/mfd/rpisense/framebuffer.h>
|
|
+#include <linux/mfd/rpisense/core.h>
|
|
+
|
|
+struct rpisense *rpisense;
|
|
+
|
|
+struct rpisense_fb_param {
|
|
+ char __iomem *vmem;
|
|
+ u8 *vmem_work;
|
|
+ u32 vmemsize;
|
|
+ u8 gamma[32];
|
|
+};
|
|
+
|
|
+static struct rpisense_fb_param rpisense_fb_param = {
|
|
+ .vmem = NULL,
|
|
+ .vmemsize = 128,
|
|
+ .gamma = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01,
|
|
+ 0x02, 0x02, 0x03, 0x03, 0x04, 0x05, 0x06, 0x07,
|
|
+ 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0E, 0x0F, 0x11,
|
|
+ 0x12, 0x14, 0x15, 0x17, 0x19, 0x1B, 0x1D, 0x1F,},
|
|
+};
|
|
+
|
|
+static struct fb_deferred_io rpisense_fb_defio;
|
|
+
|
|
+static struct fb_fix_screeninfo rpisense_fb_fix = {
|
|
+ .id = "RPi-Sense FB",
|
|
+ .type = FB_TYPE_PACKED_PIXELS,
|
|
+ .visual = FB_VISUAL_TRUECOLOR,
|
|
+ .xpanstep = 0,
|
|
+ .ypanstep = 0,
|
|
+ .ywrapstep = 0,
|
|
+ .accel = FB_ACCEL_NONE,
|
|
+ .line_length = 16,
|
|
+};
|
|
+
|
|
+static struct fb_var_screeninfo rpisense_fb_var = {
|
|
+ .xres = 8,
|
|
+ .yres = 8,
|
|
+ .xres_virtual = 8,
|
|
+ .yres_virtual = 8,
|
|
+ .bits_per_pixel = 16,
|
|
+ .red = {11, 5, 0},
|
|
+ .green = {5, 6, 0},
|
|
+ .blue = {0, 5, 0},
|
|
+};
|
|
+
|
|
+static ssize_t rpisense_fb_write(struct fb_info *info,
|
|
+ const char __user *buf, size_t count,
|
|
+ loff_t *ppos)
|
|
+{
|
|
+ ssize_t res = fb_sys_write(info, buf, count, ppos);
|
|
+
|
|
+ schedule_delayed_work(&info->deferred_work, rpisense_fb_defio.delay);
|
|
+ return res;
|
|
+}
|
|
+
|
|
+static void rpisense_fb_fillrect(struct fb_info *info,
|
|
+ const struct fb_fillrect *rect)
|
|
+{
|
|
+ sys_fillrect(info, rect);
|
|
+ schedule_delayed_work(&info->deferred_work, rpisense_fb_defio.delay);
|
|
+}
|
|
+
|
|
+static void rpisense_fb_copyarea(struct fb_info *info,
|
|
+ const struct fb_copyarea *area)
|
|
+{
|
|
+ sys_copyarea(info, area);
|
|
+ schedule_delayed_work(&info->deferred_work, rpisense_fb_defio.delay);
|
|
+}
|
|
+
|
|
+static void rpisense_fb_imageblit(struct fb_info *info,
|
|
+ const struct fb_image *image)
|
|
+{
|
|
+ sys_imageblit(info, image);
|
|
+ schedule_delayed_work(&info->deferred_work, rpisense_fb_defio.delay);
|
|
+}
|
|
+
|
|
+static void rpisense_fb_deferred_io(struct fb_info *info,
|
|
+ struct list_head *pagelist)
|
|
+{
|
|
+ int i;
|
|
+ int j;
|
|
+ u8 *vmem_work = rpisense_fb_param.vmem_work;
|
|
+ u16 *mem = (u16 *)rpisense_fb_param.vmem;
|
|
+ u8 *gamma = rpisense_fb_param.gamma;
|
|
+
|
|
+ vmem_work[0] = 0;
|
|
+ for (j = 0; j < 8; j++) {
|
|
+ for (i = 0; i < 8; i++) {
|
|
+ vmem_work[(j * 24) + i + 1] =
|
|
+ gamma[(mem[(j * 8) + i] >> 11) & 0x1F];
|
|
+ vmem_work[(j * 24) + (i + 8) + 1] =
|
|
+ gamma[(mem[(j * 8) + i] >> 6) & 0x1F];
|
|
+ vmem_work[(j * 24) + (i + 16) + 1] =
|
|
+ gamma[(mem[(j * 8) + i]) & 0x1F];
|
|
+ }
|
|
+ }
|
|
+ rpisense_block_write(rpisense, vmem_work, 193);
|
|
+}
|
|
+
|
|
+static struct fb_deferred_io rpisense_fb_defio = {
|
|
+ .delay = HZ/100,
|
|
+ .deferred_io = rpisense_fb_deferred_io,
|
|
+};
|
|
+
|
|
+static struct fb_ops rpisense_fb_ops = {
|
|
+ .owner = THIS_MODULE,
|
|
+ .fb_read = fb_sys_read,
|
|
+ .fb_write = rpisense_fb_write,
|
|
+ .fb_fillrect = rpisense_fb_fillrect,
|
|
+ .fb_copyarea = rpisense_fb_copyarea,
|
|
+ .fb_imageblit = rpisense_fb_imageblit,
|
|
+};
|
|
+
|
|
+static int rpisense_fb_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct fb_info *info;
|
|
+ int ret = -ENOMEM;
|
|
+ struct rpisense_fb *rpisense_fb;
|
|
+
|
|
+ rpisense = rpisense_get_dev();
|
|
+ rpisense_fb = &rpisense->framebuffer;
|
|
+
|
|
+ rpisense_fb_param.vmem = vzalloc(rpisense_fb_param.vmemsize);
|
|
+ if (!rpisense_fb_param.vmem)
|
|
+ return ret;
|
|
+
|
|
+ rpisense_fb_param.vmem_work = devm_kmalloc(&pdev->dev, 193, GFP_KERNEL);
|
|
+ if (!rpisense_fb_param.vmem_work)
|
|
+ goto err_malloc;
|
|
+
|
|
+ info = framebuffer_alloc(0, &pdev->dev);
|
|
+ if (!info) {
|
|
+ dev_err(&pdev->dev, "Could not allocate framebuffer.\n");
|
|
+ goto err_malloc;
|
|
+ }
|
|
+ rpisense_fb->info = info;
|
|
+
|
|
+ rpisense_fb_fix.smem_start = (unsigned long)rpisense_fb_param.vmem;
|
|
+ rpisense_fb_fix.smem_len = rpisense_fb_param.vmemsize;
|
|
+
|
|
+ info->fbops = &rpisense_fb_ops;
|
|
+ info->fix = rpisense_fb_fix;
|
|
+ info->var = rpisense_fb_var;
|
|
+ info->fbdefio = &rpisense_fb_defio;
|
|
+ info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB;
|
|
+ info->screen_base = rpisense_fb_param.vmem;
|
|
+ info->screen_size = rpisense_fb_param.vmemsize;
|
|
+
|
|
+ fb_deferred_io_init(info);
|
|
+
|
|
+ ret = register_framebuffer(info);
|
|
+ if (ret < 0) {
|
|
+ dev_err(&pdev->dev, "Could not register framebuffer.\n");
|
|
+ goto err_fballoc;
|
|
+ }
|
|
+
|
|
+ fb_info(info, "%s frame buffer device\n", info->fix.id);
|
|
+ schedule_delayed_work(&info->deferred_work, rpisense_fb_defio.delay);
|
|
+ return 0;
|
|
+err_fballoc:
|
|
+ framebuffer_release(info);
|
|
+err_malloc:
|
|
+ vfree(rpisense_fb_param.vmem);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static int rpisense_fb_remove(struct platform_device *pdev)
|
|
+{
|
|
+ struct rpisense_fb *rpisense_fb = &rpisense->framebuffer;
|
|
+ struct fb_info *info = rpisense_fb->info;
|
|
+
|
|
+ if (info) {
|
|
+ unregister_framebuffer(info);
|
|
+ fb_deferred_io_cleanup(info);
|
|
+ framebuffer_release(info);
|
|
+ vfree(rpisense_fb_param.vmem);
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+#ifdef CONFIG_OF
|
|
+static const struct of_device_id rpisense_fb_id[] = {
|
|
+ { .compatible = "rpi,rpi-sense-fb" },
|
|
+ { },
|
|
+};
|
|
+MODULE_DEVICE_TABLE(of, rpisense_fb_id);
|
|
+#endif
|
|
+
|
|
+static struct platform_device_id rpisense_fb_device_id[] = {
|
|
+ { .name = "rpi-sense-fb" },
|
|
+ { },
|
|
+};
|
|
+MODULE_DEVICE_TABLE(platform, rpisense_fb_device_id);
|
|
+
|
|
+static struct platform_driver rpisense_fb_driver = {
|
|
+ .probe = rpisense_fb_probe,
|
|
+ .remove = rpisense_fb_remove,
|
|
+ .driver = {
|
|
+ .name = "rpi-sense-fb",
|
|
+ .owner = THIS_MODULE,
|
|
+ },
|
|
+};
|
|
+
|
|
+module_platform_driver(rpisense_fb_driver);
|
|
+
|
|
+MODULE_DESCRIPTION("Raspberry Pi Sense HAT framebuffer driver");
|
|
+MODULE_AUTHOR("Serge Schneider <serge@raspberrypi.org>");
|
|
+MODULE_LICENSE("GPL");
|
|
+
|
|
--- /dev/null
|
|
+++ b/include/linux/mfd/rpisense/core.h
|
|
@@ -0,0 +1,47 @@
|
|
+/*
|
|
+ * Raspberry Pi Sense HAT core driver
|
|
+ * http://raspberrypi.org
|
|
+ *
|
|
+ * Copyright (C) 2015 Raspberry Pi
|
|
+ *
|
|
+ * Author: Serge Schneider
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
+ * option) any later version.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#ifndef __LINUX_MFD_RPISENSE_CORE_H_
|
|
+#define __LINUX_MFD_RPISENSE_CORE_H_
|
|
+
|
|
+#include <linux/mfd/rpisense/joystick.h>
|
|
+#include <linux/mfd/rpisense/framebuffer.h>
|
|
+
|
|
+/*
|
|
+ * Register values.
|
|
+ */
|
|
+#define RPISENSE_FB 0x00
|
|
+#define RPISENSE_WAI 0xF0
|
|
+#define RPISENSE_VER 0xF1
|
|
+#define RPISENSE_KEYS 0xF2
|
|
+#define RPISENSE_EE_WP 0xF3
|
|
+
|
|
+#define RPISENSE_ID 's'
|
|
+
|
|
+struct rpisense {
|
|
+ struct device *dev;
|
|
+ struct i2c_client *i2c_client;
|
|
+
|
|
+ /* Client devices */
|
|
+ struct rpisense_js joystick;
|
|
+ struct rpisense_fb framebuffer;
|
|
+};
|
|
+
|
|
+struct rpisense *rpisense_get_dev(void);
|
|
+s32 rpisense_reg_read(struct rpisense *rpisense, int reg);
|
|
+int rpisense_reg_write(struct rpisense *rpisense, int reg, u16 val);
|
|
+int rpisense_block_write(struct rpisense *rpisense, const char *buf, int count);
|
|
+
|
|
+#endif
|
|
--- /dev/null
|
|
+++ b/include/linux/mfd/rpisense/framebuffer.h
|
|
@@ -0,0 +1,28 @@
|
|
+/*
|
|
+ * Raspberry Pi Sense HAT framebuffer driver
|
|
+ * http://raspberrypi.org
|
|
+ *
|
|
+ * Copyright (C) 2015 Raspberry Pi
|
|
+ *
|
|
+ * Author: Serge Schneider
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
+ * option) any later version.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#ifndef __LINUX_RPISENSE_FB_H_
|
|
+#define __LINUX_RPISENSE_FB_H_
|
|
+
|
|
+#include <linux/platform_device.h>
|
|
+
|
|
+struct rpisense;
|
|
+
|
|
+struct rpisense_fb {
|
|
+ struct platform_device *pdev;
|
|
+ struct fb_info *info;
|
|
+};
|
|
+
|
|
+#endif
|
|
--- /dev/null
|
|
+++ b/include/linux/mfd/rpisense/joystick.h
|
|
@@ -0,0 +1,35 @@
|
|
+/*
|
|
+ * Raspberry Pi Sense HAT joystick driver
|
|
+ * http://raspberrypi.org
|
|
+ *
|
|
+ * Copyright (C) 2015 Raspberry Pi
|
|
+ *
|
|
+ * Author: Serge Schneider
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
+ * option) any later version.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#ifndef __LINUX_RPISENSE_JOYSTICK_H_
|
|
+#define __LINUX_RPISENSE_JOYSTICK_H_
|
|
+
|
|
+#include <linux/input.h>
|
|
+#include <linux/interrupt.h>
|
|
+#include <linux/gpio/consumer.h>
|
|
+#include <linux/platform_device.h>
|
|
+
|
|
+struct rpisense;
|
|
+
|
|
+struct rpisense_js {
|
|
+ struct platform_device *pdev;
|
|
+ struct input_dev *keys_dev;
|
|
+ struct gpio_desc *keys_desc;
|
|
+ struct work_struct keys_work_s;
|
|
+ int keys_irq;
|
|
+};
|
|
+
|
|
+
|
|
+#endif
|