mirror of https://github.com/hak5/openwrt.git
839 lines
23 KiB
Diff
839 lines
23 KiB
Diff
From 2b475b95bcf5487bd23b7a636ce36fae98f6e81a Mon Sep 17 00:00:00 2001
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From: Phil Elwell <pelwell@users.noreply.github.com>
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Date: Tue, 14 Jul 2015 14:32:47 +0100
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Subject: [PATCH] mfd: Add Raspberry Pi Sense HAT core driver
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---
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drivers/input/joystick/Kconfig | 8 +
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drivers/input/joystick/Makefile | 1 +
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drivers/input/joystick/rpisense-js.c | 153 ++++++++++++++++
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drivers/mfd/Kconfig | 8 +
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drivers/mfd/Makefile | 2 +
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drivers/mfd/rpisense-core.c | 157 +++++++++++++++++
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drivers/video/fbdev/Kconfig | 13 ++
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drivers/video/fbdev/Makefile | 1 +
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drivers/video/fbdev/rpisense-fb.c | 293 +++++++++++++++++++++++++++++++
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include/linux/mfd/rpisense/core.h | 47 +++++
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include/linux/mfd/rpisense/framebuffer.h | 32 ++++
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include/linux/mfd/rpisense/joystick.h | 35 ++++
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12 files changed, 750 insertions(+)
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create mode 100644 drivers/input/joystick/rpisense-js.c
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create mode 100644 drivers/mfd/rpisense-core.c
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create mode 100644 drivers/video/fbdev/rpisense-fb.c
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create mode 100644 include/linux/mfd/rpisense/core.h
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create mode 100644 include/linux/mfd/rpisense/framebuffer.h
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create mode 100644 include/linux/mfd/rpisense/joystick.h
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--- a/drivers/input/joystick/Kconfig
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+++ b/drivers/input/joystick/Kconfig
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@@ -330,4 +330,12 @@ config JOYSTICK_MAPLE
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To compile this as a module choose M here: the module will be called
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maplecontrol.
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+config JOYSTICK_RPISENSE
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+ tristate "Raspberry Pi Sense HAT joystick"
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+ depends on GPIOLIB && INPUT
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+ select MFD_RPISENSE_CORE
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+
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+ help
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+ This is the joystick driver for the Raspberry Pi Sense HAT
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+
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endif
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--- a/drivers/input/joystick/Makefile
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+++ b/drivers/input/joystick/Makefile
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@@ -32,4 +32,5 @@ obj-$(CONFIG_JOYSTICK_WARRIOR) += warri
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obj-$(CONFIG_JOYSTICK_XPAD) += xpad.o
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obj-$(CONFIG_JOYSTICK_ZHENHUA) += zhenhua.o
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obj-$(CONFIG_JOYSTICK_WALKERA0701) += walkera0701.o
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+obj-$(CONFIG_JOYSTICK_RPISENSE) += rpisense-js.o
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--- /dev/null
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+++ b/drivers/input/joystick/rpisense-js.c
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@@ -0,0 +1,153 @@
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+/*
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+ * Raspberry Pi Sense HAT joystick driver
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+ * http://raspberrypi.org
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+ *
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+ * Copyright (C) 2015 Raspberry Pi
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+ *
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+ * Author: Serge Schneider
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License as published by the
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+ * Free Software Foundation; either version 2 of the License, or (at your
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+ * option) any later version.
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+ *
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+ */
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+
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+#include <linux/module.h>
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+
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+#include <linux/mfd/rpisense/joystick.h>
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+#include <linux/mfd/rpisense/core.h>
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+
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+static struct rpisense *rpisense;
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+static unsigned char keymap[5] = {KEY_DOWN, KEY_RIGHT, KEY_UP, KEY_ENTER, KEY_LEFT,};
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+
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+static void keys_work_fn(struct work_struct *work)
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+{
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+ int i;
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+ static s32 prev_keys;
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+ struct rpisense_js *rpisense_js = &rpisense->joystick;
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+ s32 keys = rpisense_reg_read(rpisense, RPISENSE_KEYS);
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+ s32 changes = keys ^ prev_keys;
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+
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+ prev_keys = keys;
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+ for (i = 0; i < 5; i++) {
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+ if (changes & 1) {
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+ input_report_key(rpisense_js->keys_dev,
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+ keymap[i], keys & 1);
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+ }
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+ changes >>= 1;
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+ keys >>= 1;
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+ }
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+ input_sync(rpisense_js->keys_dev);
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+}
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+
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+static irqreturn_t keys_irq_handler(int irq, void *pdev)
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+{
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+ struct rpisense_js *rpisense_js = &rpisense->joystick;
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+
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+ schedule_work(&rpisense_js->keys_work_s);
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+ return IRQ_HANDLED;
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+}
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+
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+static int rpisense_js_probe(struct platform_device *pdev)
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+{
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+ int ret;
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+ int i;
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+ struct rpisense_js *rpisense_js;
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+
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+ rpisense = rpisense_get_dev();
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+ rpisense_js = &rpisense->joystick;
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+
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+ INIT_WORK(&rpisense_js->keys_work_s, keys_work_fn);
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+
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+ rpisense_js->keys_dev = input_allocate_device();
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+ if (!rpisense_js->keys_dev) {
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+ dev_err(&pdev->dev, "Could not allocate input device.\n");
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+ return -ENOMEM;
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+ }
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+
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+ rpisense_js->keys_dev->evbit[0] = BIT_MASK(EV_KEY);
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+ for (i = 0; i < ARRAY_SIZE(keymap); i++) {
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+ set_bit(keymap[i],
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+ rpisense_js->keys_dev->keybit);
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+ }
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+
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+ rpisense_js->keys_dev->name = "Raspberry Pi Sense HAT Joystick";
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+ rpisense_js->keys_dev->phys = "rpi-sense-joy/input0";
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+ rpisense_js->keys_dev->id.bustype = BUS_I2C;
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+ rpisense_js->keys_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
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+ rpisense_js->keys_dev->keycode = keymap;
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+ rpisense_js->keys_dev->keycodesize = sizeof(unsigned char);
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+ rpisense_js->keys_dev->keycodemax = ARRAY_SIZE(keymap);
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+
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+ ret = input_register_device(rpisense_js->keys_dev);
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+ if (ret) {
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+ dev_err(&pdev->dev, "Could not register input device.\n");
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+ goto err_keys_alloc;
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+ }
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+
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+ ret = gpiod_direction_input(rpisense_js->keys_desc);
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+ if (ret) {
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+ dev_err(&pdev->dev, "Could not set keys-int direction.\n");
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+ goto err_keys_reg;
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+ }
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+
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+ rpisense_js->keys_irq = gpiod_to_irq(rpisense_js->keys_desc);
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+ if (rpisense_js->keys_irq < 0) {
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+ dev_err(&pdev->dev, "Could not determine keys-int IRQ.\n");
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+ ret = rpisense_js->keys_irq;
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+ goto err_keys_reg;
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+ }
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+
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+ ret = devm_request_irq(&pdev->dev, rpisense_js->keys_irq,
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+ keys_irq_handler, IRQF_TRIGGER_RISING,
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+ "keys", &pdev->dev);
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+ if (ret) {
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+ dev_err(&pdev->dev, "IRQ request failed.\n");
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+ goto err_keys_reg;
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+ }
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+ return 0;
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+err_keys_reg:
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+ input_unregister_device(rpisense_js->keys_dev);
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+err_keys_alloc:
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+ input_free_device(rpisense_js->keys_dev);
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+ return ret;
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+}
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+
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+static int rpisense_js_remove(struct platform_device *pdev)
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+{
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+ struct rpisense_js *rpisense_js = &rpisense->joystick;
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+
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+ input_unregister_device(rpisense_js->keys_dev);
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+ input_free_device(rpisense_js->keys_dev);
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+ return 0;
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+}
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+
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+#ifdef CONFIG_OF
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+static const struct of_device_id rpisense_js_id[] = {
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+ { .compatible = "rpi,rpi-sense-js" },
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+ { },
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+};
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+MODULE_DEVICE_TABLE(of, rpisense_js_id);
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+#endif
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+
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+static struct platform_device_id rpisense_js_device_id[] = {
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+ { .name = "rpi-sense-js" },
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+ { },
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+};
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+MODULE_DEVICE_TABLE(platform, rpisense_js_device_id);
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+
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+static struct platform_driver rpisense_js_driver = {
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+ .probe = rpisense_js_probe,
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+ .remove = rpisense_js_remove,
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+ .driver = {
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+ .name = "rpi-sense-js",
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+ .owner = THIS_MODULE,
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+ },
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+};
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+
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+module_platform_driver(rpisense_js_driver);
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+
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+MODULE_DESCRIPTION("Raspberry Pi Sense HAT joystick driver");
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+MODULE_AUTHOR("Serge Schneider <serge@raspberrypi.org>");
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+MODULE_LICENSE("GPL");
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--- a/drivers/mfd/Kconfig
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+++ b/drivers/mfd/Kconfig
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@@ -10,6 +10,14 @@ config MFD_CORE
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select IRQ_DOMAIN
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default n
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+config MFD_RPISENSE_CORE
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+ tristate "Raspberry Pi Sense HAT core functions"
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+ depends on I2C
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+ select MFD_CORE
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+ help
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+ This is the core driver for the Raspberry Pi Sense HAT. This provides
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+ the necessary functions to communicate with the hardware.
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+
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config MFD_CS5535
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tristate "AMD CS5535 and CS5536 southbridge core functions"
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select MFD_CORE
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--- a/drivers/mfd/Makefile
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+++ b/drivers/mfd/Makefile
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@@ -194,3 +194,5 @@ intel-soc-pmic-objs := intel_soc_pmic_c
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intel-soc-pmic-$(CONFIG_INTEL_PMC_IPC) += intel_soc_pmic_bxtwc.o
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obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o
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obj-$(CONFIG_MFD_MT6397) += mt6397-core.o
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+
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+obj-$(CONFIG_MFD_RPISENSE_CORE) += rpisense-core.o
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--- /dev/null
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+++ b/drivers/mfd/rpisense-core.c
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@@ -0,0 +1,157 @@
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+/*
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+ * Raspberry Pi Sense HAT core driver
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+ * http://raspberrypi.org
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+ *
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+ * Copyright (C) 2015 Raspberry Pi
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+ *
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+ * Author: Serge Schneider
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License as published by the
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+ * Free Software Foundation; either version 2 of the License, or (at your
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+ * option) any later version.
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+ *
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+ * This driver is based on wm8350 implementation.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/moduleparam.h>
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+#include <linux/err.h>
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+#include <linux/init.h>
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+#include <linux/i2c.h>
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+#include <linux/platform_device.h>
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+#include <linux/mfd/rpisense/core.h>
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+#include <linux/slab.h>
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+
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+static struct rpisense *rpisense;
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+
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+static void rpisense_client_dev_register(struct rpisense *rpisense,
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+ const char *name,
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+ struct platform_device **pdev)
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+{
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+ int ret;
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+
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+ *pdev = platform_device_alloc(name, -1);
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+ if (*pdev == NULL) {
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+ dev_err(rpisense->dev, "Failed to allocate %s\n", name);
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+ return;
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+ }
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+
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+ (*pdev)->dev.parent = rpisense->dev;
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+ platform_set_drvdata(*pdev, rpisense);
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+ ret = platform_device_add(*pdev);
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+ if (ret != 0) {
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+ dev_err(rpisense->dev, "Failed to register %s: %d\n",
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+ name, ret);
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+ platform_device_put(*pdev);
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+ *pdev = NULL;
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+ }
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+}
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+
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+static int rpisense_probe(struct i2c_client *i2c,
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+ const struct i2c_device_id *id)
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+{
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+ int ret;
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+ struct rpisense_js *rpisense_js;
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+
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+ rpisense = devm_kzalloc(&i2c->dev, sizeof(struct rpisense), GFP_KERNEL);
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+ if (rpisense == NULL)
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+ return -ENOMEM;
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+
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+ i2c_set_clientdata(i2c, rpisense);
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+ rpisense->dev = &i2c->dev;
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+ rpisense->i2c_client = i2c;
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+
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+ ret = rpisense_reg_read(rpisense, RPISENSE_WAI);
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+ if (ret > 0) {
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+ if (ret != 's')
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+ return -EINVAL;
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+ } else {
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+ return ret;
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+ }
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+ ret = rpisense_reg_read(rpisense, RPISENSE_VER);
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+ if (ret < 0)
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+ return ret;
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+
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+ dev_info(rpisense->dev,
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+ "Raspberry Pi Sense HAT firmware version %i\n", ret);
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+
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+ rpisense_js = &rpisense->joystick;
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+ rpisense_js->keys_desc = devm_gpiod_get(&i2c->dev,
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+ "keys-int", GPIOD_IN);
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+ if (IS_ERR(rpisense_js->keys_desc)) {
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+ dev_warn(&i2c->dev, "Failed to get keys-int descriptor.\n");
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+ rpisense_js->keys_desc = gpio_to_desc(23);
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+ if (rpisense_js->keys_desc == NULL) {
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+ dev_err(&i2c->dev, "GPIO23 fallback failed.\n");
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+ return PTR_ERR(rpisense_js->keys_desc);
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+ }
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+ }
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+ rpisense_client_dev_register(rpisense, "rpi-sense-js",
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+ &(rpisense->joystick.pdev));
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+ rpisense_client_dev_register(rpisense, "rpi-sense-fb",
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+ &(rpisense->framebuffer.pdev));
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+
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+ return 0;
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+}
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+
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+static int rpisense_remove(struct i2c_client *i2c)
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+{
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+ struct rpisense *rpisense = i2c_get_clientdata(i2c);
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+
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+ platform_device_unregister(rpisense->joystick.pdev);
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+ return 0;
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+}
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+
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+struct rpisense *rpisense_get_dev(void)
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+{
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+ return rpisense;
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+}
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+EXPORT_SYMBOL_GPL(rpisense_get_dev);
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+
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+s32 rpisense_reg_read(struct rpisense *rpisense, int reg)
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+{
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+ int ret = i2c_smbus_read_byte_data(rpisense->i2c_client, reg);
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+
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+ if (ret < 0)
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+ dev_err(rpisense->dev, "Read from reg %d failed\n", reg);
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+ /* Due to the BCM270x I2C clock stretching bug, some values
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+ * may have MSB set. Clear it to avoid incorrect values.
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+ * */
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+ return ret & 0x7F;
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+}
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+EXPORT_SYMBOL_GPL(rpisense_reg_read);
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+
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+int rpisense_block_write(struct rpisense *rpisense, const char *buf, int count)
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+{
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+ int ret = i2c_master_send(rpisense->i2c_client, buf, count);
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+
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+ if (ret < 0)
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+ dev_err(rpisense->dev, "Block write failed\n");
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+ return ret;
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+}
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+EXPORT_SYMBOL_GPL(rpisense_block_write);
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+
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+static const struct i2c_device_id rpisense_i2c_id[] = {
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+ { "rpi-sense", 0 },
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+ { }
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+};
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+MODULE_DEVICE_TABLE(i2c, rpisense_i2c_id);
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+
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+
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+static struct i2c_driver rpisense_driver = {
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+ .driver = {
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+ .name = "rpi-sense",
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+ .owner = THIS_MODULE,
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+ },
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+ .probe = rpisense_probe,
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+ .remove = rpisense_remove,
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+ .id_table = rpisense_i2c_id,
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+};
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+
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+module_i2c_driver(rpisense_driver);
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+
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+MODULE_DESCRIPTION("Raspberry Pi Sense HAT core driver");
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+MODULE_AUTHOR("Serge Schneider <serge@raspberrypi.org>");
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+MODULE_LICENSE("GPL");
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+
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--- a/drivers/video/fbdev/Kconfig
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+++ b/drivers/video/fbdev/Kconfig
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@@ -2505,3 +2505,16 @@ config FB_SM712
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This driver is also available as a module. The module will be
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called sm712fb. If you want to compile it as a module, say M
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here and read <file:Documentation/kbuild/modules.txt>.
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+
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+config FB_RPISENSE
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+ tristate "Raspberry Pi Sense HAT framebuffer"
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+ depends on FB
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+ select MFD_RPISENSE_CORE
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+ select FB_SYS_FOPS
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+ select FB_SYS_FILLRECT
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+ select FB_SYS_COPYAREA
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+ select FB_SYS_IMAGEBLIT
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+ select FB_DEFERRED_IO
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+
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+ help
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+ This is the framebuffer driver for the Raspberry Pi Sense HAT
|
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--- a/drivers/video/fbdev/Makefile
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+++ b/drivers/video/fbdev/Makefile
|
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@@ -150,6 +150,7 @@ obj-$(CONFIG_FB_DA8XX) += da8xx-fb.o
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obj-$(CONFIG_FB_MXS) += mxsfb.o
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obj-$(CONFIG_FB_SSD1307) += ssd1307fb.o
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obj-$(CONFIG_FB_SIMPLE) += simplefb.o
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+obj-$(CONFIG_FB_RPISENSE) += rpisense-fb.o
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|
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# the test framebuffer is last
|
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obj-$(CONFIG_FB_VIRTUAL) += vfb.o
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--- /dev/null
|
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+++ b/drivers/video/fbdev/rpisense-fb.c
|
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@@ -0,0 +1,293 @@
|
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+/*
|
|
+ * 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>
|
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+#include <linux/kernel.h>
|
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+#include <linux/errno.h>
|
|
+#include <linux/string.h>
|
|
+#include <linux/mm.h>
|
|
+#include <linux/slab.h>
|
|
+#include <linux/uaccess.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>
|
|
+
|
|
+static bool lowlight;
|
|
+module_param(lowlight, bool, 0);
|
|
+MODULE_PARM_DESC(lowlight, "Reduce LED matrix brightness to one third");
|
|
+
|
|
+static struct rpisense *rpisense;
|
|
+
|
|
+struct rpisense_fb_param {
|
|
+ char __iomem *vmem;
|
|
+ u8 *vmem_work;
|
|
+ u32 vmemsize;
|
|
+ u8 *gamma;
|
|
+};
|
|
+
|
|
+static u8 gamma_default[32] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01,
|
|
+ 0x02, 0x02, 0x03, 0x03, 0x04, 0x05, 0x06, 0x07,
|
|
+ 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0E, 0x0F, 0x11,
|
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+ 0x12, 0x14, 0x15, 0x17, 0x19, 0x1B, 0x1D, 0x1F,};
|
|
+
|
|
+static u8 gamma_low[32] = {0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
|
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+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02,
|
|
+ 0x03, 0x03, 0x03, 0x04, 0x04, 0x05, 0x05, 0x06,
|
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+ 0x06, 0x07, 0x07, 0x08, 0x08, 0x09, 0x0A, 0x0A,};
|
|
+
|
|
+static u8 gamma_user[32];
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|
+
|
|
+static struct rpisense_fb_param rpisense_fb_param = {
|
|
+ .vmem = NULL,
|
|
+ .vmemsize = 128,
|
|
+ .gamma = gamma_default,
|
|
+};
|
|
+
|
|
+static struct fb_deferred_io rpisense_fb_defio;
|
|
+
|
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+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},
|
|
+};
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|
+
|
|
+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 int rpisense_fb_ioctl(struct fb_info *info, unsigned int cmd,
|
|
+ unsigned long arg)
|
|
+{
|
|
+ switch (cmd) {
|
|
+ case SENSEFB_FBIOGET_GAMMA:
|
|
+ if (copy_to_user((void __user *) arg, rpisense_fb_param.gamma,
|
|
+ sizeof(u8[32])))
|
|
+ return -EFAULT;
|
|
+ return 0;
|
|
+ case SENSEFB_FBIOSET_GAMMA:
|
|
+ if (copy_from_user(gamma_user, (void __user *)arg,
|
|
+ sizeof(u8[32])))
|
|
+ return -EFAULT;
|
|
+ rpisense_fb_param.gamma = gamma_user;
|
|
+ schedule_delayed_work(&info->deferred_work,
|
|
+ rpisense_fb_defio.delay);
|
|
+ return 0;
|
|
+ case SENSEFB_FBIORESET_GAMMA:
|
|
+ switch (arg) {
|
|
+ case 0:
|
|
+ rpisense_fb_param.gamma = gamma_default;
|
|
+ break;
|
|
+ case 1:
|
|
+ rpisense_fb_param.gamma = gamma_low;
|
|
+ break;
|
|
+ case 2:
|
|
+ rpisense_fb_param.gamma = gamma_user;
|
|
+ break;
|
|
+ default:
|
|
+ return -EINVAL;
|
|
+ }
|
|
+ schedule_delayed_work(&info->deferred_work,
|
|
+ rpisense_fb_defio.delay);
|
|
+ break;
|
|
+ default:
|
|
+ return -EINVAL;
|
|
+ }
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+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,
|
|
+ .fb_ioctl = rpisense_fb_ioctl,
|
|
+};
|
|
+
|
|
+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;
|
|
+
|
|
+ if (lowlight)
|
|
+ rpisense_fb_param.gamma = gamma_low;
|
|
+
|
|
+ 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 +1,32 @@
|
|
+/*
|
|
+ * 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_
|
|
+
|
|
+#define SENSEFB_FBIO_IOC_MAGIC 0xF1
|
|
+
|
|
+#define SENSEFB_FBIOGET_GAMMA _IO(SENSEFB_FBIO_IOC_MAGIC, 0)
|
|
+#define SENSEFB_FBIOSET_GAMMA _IO(SENSEFB_FBIO_IOC_MAGIC, 1)
|
|
+#define SENSEFB_FBIORESET_GAMMA _IO(SENSEFB_FBIO_IOC_MAGIC, 2)
|
|
+
|
|
+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
|