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openwrt/target/linux/bcm27xx/patches-4.19/950-0099-Tidy-up-of-the-ft5406-driver-to-use-DT-2189.patch
Adrian Schmutzler 7d7aa2fd92 brcm2708: rename target to bcm27xx 
This change makes the names of Broadcom targets consistent by using
the common notation based on SoC/CPU ID (which is used internally
anyway), bcmXXXX instead of brcmXXXX.
This is even used for target TITLE in make menuconfig already,
only the short target name used brcm so far.

Despite, since subtargets range from bcm2708 to bcm2711, it seems
appropriate to use bcm27xx instead of bcm2708 (again, as already done
for BOARDNAME).

This also renames the packages brcm2708-userland and brcm2708-gpu-fw.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-02-14 14:10:51 +01:00

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From 67acc12c996ef55038206de9e4220e69bf8dd517 Mon Sep 17 00:00:00 2001
From: James Hughes <JamesH65@users.noreply.github.com>
Date: Thu, 16 Nov 2017 15:56:17 +0000
Subject: [PATCH] Tidy up of the ft5406 driver to use DT (#2189)
Driver was using a fixed resolution, this commit
adds touchscreen size, and coordinate flip and swap
features via device tree overlays.
Adds overrides so the VC4 can adjust the DT parameters
appropriately; there is a newer version of the VC4 side
driver that can now set up the appropriate DT values
if required.
Signed-off-by: James Hughes <james.hughes@raspberrypi.org>
---
drivers/input/touchscreen/rpi-ft5406.c | 218 ++++++++++++++++---------
1 file changed, 145 insertions(+), 73 deletions(-)
--- a/drivers/input/touchscreen/rpi-ft5406.c
+++ b/drivers/input/touchscreen/rpi-ft5406.c
@@ -1,7 +1,7 @@
/*
* Driver for memory based ft5406 touchscreen
*
- * Copyright (C) 2015 Raspberry Pi
+ * Copyright (C) 2015, 2017 Raspberry Pi
*
*
* This program is free software; you can redistribute it and/or modify
@@ -9,7 +9,6 @@
* published by the Free Software Foundation.
*/
-
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/input.h>
@@ -21,11 +20,15 @@
#include <linux/kthread.h>
#include <linux/platform_device.h>
#include <linux/stddef.h>
-#include <asm/io.h>
+#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <soc/bcm2835/raspberrypi-firmware.h>
#define MAXIMUM_SUPPORTED_POINTS 10
+#define FTS_TOUCH_DOWN 0
+#define FTS_TOUCH_UP 1
+#define FTS_TOUCH_CONTACT 2
+
struct ft5406_regs {
uint8_t device_mode;
uint8_t gesture_id;
@@ -35,85 +38,125 @@ struct ft5406_regs {
uint8_t xl;
uint8_t yh;
uint8_t yl;
- uint8_t res1;
- uint8_t res2;
+ uint8_t pressure; /* Not supported */
+ uint8_t area; /* Not supported */
} point[MAXIMUM_SUPPORTED_POINTS];
};
-#define SCREEN_WIDTH 800
-#define SCREEN_HEIGHT 480
+/* These are defaults if the DT entries are missing */
+#define DEFAULT_SCREEN_WIDTH 800
+#define DEFAULT_SCREEN_HEIGHT 480
struct ft5406 {
- struct platform_device * pdev;
- struct input_dev * input_dev;
- void __iomem * ts_base;
- dma_addr_t bus_addr;
- struct task_struct * thread;
+ struct platform_device *pdev;
+ struct input_dev *input_dev;
+ void __iomem *ts_base;
+ dma_addr_t bus_addr;
+ struct task_struct *thread;
+
+ uint16_t max_x;
+ uint16_t max_y;
+ uint8_t hflip;
+ uint8_t vflip;
+ uint8_t xyswap;
};
/* Thread to poll for touchscreen events
- *
+ *
* This thread polls the memory based register copy of the ft5406 registers
* using the number of points register to know whether the copy has been
- * updated (we write 99 to the memory copy, the GPU will write between
+ * updated (we write 99 to the memory copy, the GPU will write between
* 0 - 10 points)
*/
+#define ID_TO_BIT(a) (1 << a)
+
static int ft5406_thread(void *arg)
{
struct ft5406 *ts = (struct ft5406 *) arg;
struct ft5406_regs regs;
int known_ids = 0;
-
- while(!kthread_should_stop())
- {
- // 60fps polling
+
+ while (!kthread_should_stop()) {
+ /* 60fps polling */
msleep_interruptible(17);
memcpy_fromio(&regs, ts->ts_base, sizeof(struct ft5406_regs));
- iowrite8(99, ts->ts_base + offsetof(struct ft5406_regs, num_points));
- // Do not output if theres no new information (num_points is 99)
- // or we have no touch points and don't need to release any
- if(!(regs.num_points == 99 || (regs.num_points == 0 && known_ids == 0)))
- {
+ iowrite8(99,
+ ts->ts_base +
+ offsetof(struct ft5406_regs, num_points));
+
+ /*
+ * Do not output if theres no new information (num_points is 99)
+ * or we have no touch points and don't need to release any
+ */
+ if (!(regs.num_points == 99 ||
+ (regs.num_points == 0 && known_ids == 0))) {
int i;
int modified_ids = 0, released_ids;
- for(i = 0; i < regs.num_points; i++)
- {
- int x = (((int) regs.point[i].xh & 0xf) << 8) + regs.point[i].xl;
- int y = (((int) regs.point[i].yh & 0xf) << 8) + regs.point[i].yl;
- int touchid = (regs.point[i].yh >> 4) & 0xf;
-
- modified_ids |= 1 << touchid;
- if(!((1 << touchid) & known_ids))
- dev_dbg(&ts->pdev->dev, "x = %d, y = %d, touchid = %d\n", x, y, touchid);
-
- input_mt_slot(ts->input_dev, touchid);
- input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, 1);
+ for (i = 0; i < regs.num_points; i++) {
+ int x = (((int) regs.point[i].xh & 0xf) << 8) +
+ regs.point[i].xl;
+ int y = (((int) regs.point[i].yh & 0xf) << 8) +
+ regs.point[i].yl;
+ int touchid = (regs.point[i].yh >> 4) & 0xf;
+ int event_type = (regs.point[i].xh >> 6) & 0x03;
- input_report_abs(ts->input_dev, ABS_MT_POSITION_X, x);
- input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, y);
+ modified_ids |= ID_TO_BIT(touchid);
+ if (event_type == FTS_TOUCH_DOWN ||
+ event_type == FTS_TOUCH_CONTACT) {
+ if (ts->hflip)
+ x = ts->max_x - 1 - x;
+
+ if (ts->vflip)
+ y = ts->max_y - 1 - y;
+
+ if (ts->xyswap)
+ swap(x, y);
+
+ if (!((ID_TO_BIT(touchid)) & known_ids))
+ dev_dbg(&ts->pdev->dev,
+ "x = %d, y = %d, press = %d, touchid = %d\n",
+ x, y,
+ regs.point[i].pressure,
+ touchid);
+
+ input_mt_slot(ts->input_dev, touchid);
+ input_mt_report_slot_state(
+ ts->input_dev,
+ MT_TOOL_FINGER,
+ 1);
+
+ input_report_abs(ts->input_dev,
+ ABS_MT_POSITION_X, x);
+ input_report_abs(ts->input_dev,
+ ABS_MT_POSITION_Y, y);
+ }
}
released_ids = known_ids & ~modified_ids;
- for(i = 0; released_ids && i < MAXIMUM_SUPPORTED_POINTS; i++)
- {
- if(released_ids & (1<<i))
- {
- dev_dbg(&ts->pdev->dev, "Released %d, known = %x modified = %x\n", i, known_ids, modified_ids);
+ for (i = 0;
+ released_ids && i < MAXIMUM_SUPPORTED_POINTS;
+ i++) {
+ if (released_ids & (1<<i)) {
+ dev_dbg(&ts->pdev->dev,
+ "Released %d, known = %x, modified = %x\n",
+ i, known_ids, modified_ids);
input_mt_slot(ts->input_dev, i);
- input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, 0);
- modified_ids &= ~(1 << i);
+ input_mt_report_slot_state(
+ ts->input_dev,
+ MT_TOOL_FINGER,
+ 0);
+ modified_ids &= ~(ID_TO_BIT(i));
}
}
known_ids = modified_ids;
-
+
input_mt_report_pointer_emulation(ts->input_dev, true);
input_sync(ts->input_dev);
}
-
}
-
+
return 0;
}
@@ -122,13 +165,14 @@ static int ft5406_probe(struct platform_
int err = 0;
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
- struct ft5406 * ts;
+ struct ft5406 *ts;
struct device_node *fw_node;
struct rpi_firmware *fw;
u32 touchbuf;
-
+ u32 val;
+
dev_info(dev, "Probing device\n");
-
+
fw_node = of_parse_phandle(np, "firmware", 0);
if (!fw_node) {
dev_err(dev, "Missing firmware node\n");
@@ -151,7 +195,8 @@ static int ft5406_probe(struct platform_
return -ENOMEM;
}
- ts->ts_base = dma_zalloc_coherent(dev, PAGE_SIZE, &ts->bus_addr, GFP_KERNEL);
+ ts->ts_base = dma_zalloc_coherent(dev, PAGE_SIZE, &ts->bus_addr,
+ GFP_KERNEL);
if (!ts->ts_base) {
pr_err("[%s]: failed to dma_alloc_coherent(%ld)\n",
__func__, PAGE_SIZE);
@@ -164,17 +209,22 @@ static int ft5406_probe(struct platform_
&touchbuf, sizeof(touchbuf));
if (err || touchbuf != 0) {
- dev_warn(dev, "Failed to set touchbuf, trying to get err:%x\n", err);
+ dev_warn(dev, "Failed to set touchbuf, trying to get err:%x\n",
+ err);
dma_free_coherent(dev, PAGE_SIZE, ts->ts_base, ts->bus_addr);
ts->ts_base = 0;
ts->bus_addr = 0;
}
if (!ts->ts_base) {
- dev_warn(dev, "set failed, trying get (err:%d touchbuf:%x virt:%p bus:%x)\n", err, touchbuf, ts->ts_base, ts->bus_addr);
-
- err = rpi_firmware_property(fw, RPI_FIRMWARE_FRAMEBUFFER_GET_TOUCHBUF,
- &touchbuf, sizeof(touchbuf));
+ dev_warn(dev,
+ "set failed, trying get (err:%d touchbuf:%x virt:%p bus:%x)\n",
+ err, touchbuf, ts->ts_base, ts->bus_addr);
+
+ err = rpi_firmware_property(
+ fw,
+ RPI_FIRMWARE_FRAMEBUFFER_GET_TOUCHBUF,
+ &touchbuf, sizeof(touchbuf));
if (err) {
dev_err(dev, "Failed to get touch buffer\n");
goto out;
@@ -188,11 +238,10 @@ static int ft5406_probe(struct platform_
dev_dbg(dev, "Got TS buffer 0x%x\n", touchbuf);
- // mmap the physical memory
+ /* mmap the physical memory */
touchbuf &= ~0xc0000000;
ts->ts_base = ioremap(touchbuf, sizeof(struct ft5406_regs));
- if (ts->ts_base == NULL)
- {
+ if (ts->ts_base == NULL) {
dev_err(dev, "Failed to map physical address\n");
err = -ENOMEM;
goto out;
@@ -200,22 +249,46 @@ static int ft5406_probe(struct platform_
}
platform_set_drvdata(pdev, ts);
ts->pdev = pdev;
-
+
ts->input_dev->name = "FT5406 memory based driver";
-
+
+ if (of_property_read_u32(np, "touchscreen-size-x", &val) >= 0)
+ ts->max_x = val;
+ else
+ ts->max_x = DEFAULT_SCREEN_WIDTH;
+
+ if (of_property_read_u32(np, "touchscreen-size-y", &val) >= 0)
+ ts->max_y = val;
+ else
+ ts->max_y = DEFAULT_SCREEN_HEIGHT;
+
+ if (of_property_read_u32(np, "touchscreen-inverted-x", &val) >= 0)
+ ts->hflip = val;
+
+ if (of_property_read_u32(np, "touchscreen-inverted-y", &val) >= 0)
+ ts->vflip = val;
+
+ if (of_property_read_u32(np, "touchscreen-swapped-x-y", &val) >= 0)
+ ts->xyswap = val;
+
+ dev_dbg(dev,
+ "Touchscreen parameters (%d,%d), hflip=%d, vflip=%d, xyswap=%d",
+ ts->max_x, ts->max_y, ts->hflip, ts->vflip, ts->xyswap);
+
__set_bit(EV_KEY, ts->input_dev->evbit);
__set_bit(EV_SYN, ts->input_dev->evbit);
__set_bit(EV_ABS, ts->input_dev->evbit);
input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, 0,
- SCREEN_WIDTH, 0, 0);
+ ts->xyswap ? ts->max_y : ts->max_x, 0, 0);
input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, 0,
- SCREEN_HEIGHT, 0, 0);
+ ts->xyswap ? ts->max_x : ts->max_y, 0, 0);
- input_mt_init_slots(ts->input_dev, MAXIMUM_SUPPORTED_POINTS, INPUT_MT_DIRECT);
+ input_mt_init_slots(ts->input_dev,
+ MAXIMUM_SUPPORTED_POINTS, INPUT_MT_DIRECT);
input_set_drvdata(ts->input_dev, ts);
-
+
err = input_register_device(ts->input_dev);
if (err) {
dev_err(dev, "could not register input device, %d\n",
@@ -223,10 +296,9 @@ static int ft5406_probe(struct platform_
goto out;
}
- // create thread to poll the touch events
+ /* create thread that polls the touch events */
ts->thread = kthread_run(ft5406_thread, ts, "ft5406");
- if(ts->thread == NULL)
- {
+ if (ts->thread == NULL) {
dev_err(dev, "Failed to create kernel thread");
err = -ENOMEM;
goto out;
@@ -254,9 +326,9 @@ static int ft5406_remove(struct platform
{
struct device *dev = &pdev->dev;
struct ft5406 *ts = (struct ft5406 *) platform_get_drvdata(pdev);
-
+
dev_info(dev, "Removing rpi-ft5406\n");
-
+
kthread_stop(ts->thread);
if (ts->bus_addr)
@@ -265,7 +337,7 @@ static int ft5406_remove(struct platform
iounmap(ts->ts_base);
if (ts->input_dev)
input_unregister_device(ts->input_dev);
-
+
return 0;
}
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