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author | John Crispin <blogic@openwrt.org> | 2015-07-17 12:48:39 +0000 |
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committer | John Crispin <blogic@openwrt.org> | 2015-07-17 12:48:39 +0000 |
commit | 5557174f793f95c1026b5412e721daa083a77e24 (patch) | |
tree | f7241e26cb7a88d2490021a1c2053c088d4a5256 /target/linux/brcm2708/patches-4.1/0069-rpi-ft5406-Add-touchscreen-driver-for-pi-LCD-display.patch | |
parent | 0ac89d02198acd85904e22559a0936c70fbfb294 (diff) | |
download | master-187ad058-5557174f793f95c1026b5412e721daa083a77e24.tar.gz master-187ad058-5557174f793f95c1026b5412e721daa083a77e24.tar.bz2 master-187ad058-5557174f793f95c1026b5412e721daa083a77e24.zip |
brcm2708: add linux 4.1 support
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46399 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0069-rpi-ft5406-Add-touchscreen-driver-for-pi-LCD-display.patch')
-rw-r--r-- | target/linux/brcm2708/patches-4.1/0069-rpi-ft5406-Add-touchscreen-driver-for-pi-LCD-display.patch | 310 |
1 files changed, 310 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0069-rpi-ft5406-Add-touchscreen-driver-for-pi-LCD-display.patch b/target/linux/brcm2708/patches-4.1/0069-rpi-ft5406-Add-touchscreen-driver-for-pi-LCD-display.patch new file mode 100644 index 0000000000..db36aeb089 --- /dev/null +++ b/target/linux/brcm2708/patches-4.1/0069-rpi-ft5406-Add-touchscreen-driver-for-pi-LCD-display.patch @@ -0,0 +1,310 @@ +From 156ce0fa550bbcb8e63eb60d11ac05cc28c14775 Mon Sep 17 00:00:00 2001 +From: Gordon Hollingworth <gordon@raspberrypi.org> +Date: Tue, 12 May 2015 14:47:56 +0100 +Subject: [PATCH 069/121] rpi-ft5406: Add touchscreen driver for pi LCD display + +--- + drivers/input/touchscreen/Kconfig | 7 + + drivers/input/touchscreen/Makefile | 1 + + drivers/input/touchscreen/rpi-ft5406.c | 258 ++++++++++++++++++++++++++ + include/linux/platform_data/mailbox-bcm2708.h | 1 + + 4 files changed, 267 insertions(+) + create mode 100644 drivers/input/touchscreen/rpi-ft5406.c + +--- a/drivers/input/touchscreen/Kconfig ++++ b/drivers/input/touchscreen/Kconfig +@@ -583,6 +583,13 @@ config TOUCHSCREEN_EDT_FT5X06 + To compile this driver as a module, choose M here: the + module will be called edt-ft5x06. + ++config TOUCHSCREEN_RPI_FT5406 ++ tristate "Raspberry Pi FT5406 driver" ++ depends on ARCH_BCM2708 || ARCH_BCM2709 ++ help ++ Say Y here to enable the Raspberry Pi memory based FT5406 device ++ ++ + config TOUCHSCREEN_MIGOR + tristate "Renesas MIGO-R touchscreen" + depends on SH_MIGOR && I2C +--- a/drivers/input/touchscreen/Makefile ++++ b/drivers/input/touchscreen/Makefile +@@ -29,6 +29,7 @@ obj-$(CONFIG_TOUCHSCREEN_DA9034) += da90 + obj-$(CONFIG_TOUCHSCREEN_DA9052) += da9052_tsi.o + obj-$(CONFIG_TOUCHSCREEN_DYNAPRO) += dynapro.o + obj-$(CONFIG_TOUCHSCREEN_EDT_FT5X06) += edt-ft5x06.o ++obj-$(CONFIG_TOUCHSCREEN_RPI_FT5406) += rpi-ft5406.o + obj-$(CONFIG_TOUCHSCREEN_HAMPSHIRE) += hampshire.o + obj-$(CONFIG_TOUCHSCREEN_GUNZE) += gunze.o + obj-$(CONFIG_TOUCHSCREEN_EETI) += eeti_ts.o +--- /dev/null ++++ b/drivers/input/touchscreen/rpi-ft5406.c +@@ -0,0 +1,258 @@ ++/* ++ * Driver for memory based ft5406 touchscreen ++ * ++ * Copyright (C) 2015 Raspberry Pi ++ * ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++ ++ ++#include <linux/module.h> ++#include <linux/interrupt.h> ++#include <linux/input.h> ++#include <linux/irq.h> ++#include <linux/delay.h> ++#include <linux/slab.h> ++#include <linux/bitops.h> ++#include <linux/input/mt.h> ++#include <linux/kthread.h> ++#include <linux/platform_device.h> ++#include <asm/io.h> ++#include <linux/platform_data/mailbox-bcm2708.h> ++ ++#define MAXIMUM_SUPPORTED_POINTS 10 ++struct ft5406_regs { ++ uint8_t device_mode; ++ uint8_t gesture_id; ++ uint8_t num_points; ++ struct ft5406_touch { ++ uint8_t xh; ++ uint8_t xl; ++ uint8_t yh; ++ uint8_t yl; ++ uint8_t res1; ++ uint8_t res2; ++ } point[MAXIMUM_SUPPORTED_POINTS]; ++}; ++ ++#define SCREEN_WIDTH 800 ++#define SCREEN_HEIGHT 480 ++ ++struct ft5406 { ++ struct platform_device * pdev; ++ struct input_dev * input_dev; ++ void __iomem * ts_base; ++ struct ft5406_regs * regs; ++ struct task_struct * thread; ++}; ++ ++ ++/* tag part of the message */ ++struct vc_msg_tag { ++ uint32_t tag_id; /* the message id */ ++ uint32_t buffer_size; /* size of the buffer (which in this case is always 8 bytes) */ ++ uint32_t data_size; /* amount of data being sent or received */ ++ uint32_t val; /* data buffer */ ++}; ++ ++/* message structure to be sent to videocore */ ++struct vc_msg { ++ uint32_t msg_size; /* simply, sizeof(struct vc_msg) */ ++ uint32_t request_code; /* holds various information like the success and number of bytes returned (refer to mailboxes wiki) */ ++ struct vc_msg_tag tag; /* the tag structure above to make */ ++ uint32_t end_tag; /* an end identifier, should be set to NULL */ ++}; ++ ++/* 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 ++ * 0 - 10 points) ++ */ ++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 ++ msleep(17); ++ memcpy_fromio(®s, ts->regs, sizeof(*ts->regs)); ++ writel(99, &ts->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); ++ ++ 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); ++ input_mt_slot(ts->input_dev, i); ++ input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, 0); ++ modified_ids &= ~(1 << i); ++ } ++ } ++ known_ids = modified_ids; ++ ++ input_mt_report_pointer_emulation(ts->input_dev, true); ++ input_sync(ts->input_dev); ++ } ++ ++ } ++ ++ return 0; ++} ++ ++static int ft5406_probe(struct platform_device *pdev) ++{ ++ int ret; ++ struct input_dev * input_dev = input_allocate_device(); ++ struct vc_msg request; ++ struct ft5406 * ts; ++ ++ dev_info(&pdev->dev, "Probing device\n"); ++ ++ ts = kzalloc(sizeof(struct ft5406), GFP_KERNEL); ++ ++ if (!ts || !input_dev) { ++ ret = -ENOMEM; ++ dev_err(&pdev->dev, "Failed to allocate memory\n"); ++ return ret; ++ } ++ ts->input_dev = input_dev; ++ platform_set_drvdata(pdev, ts); ++ ts->pdev = pdev; ++ ++ input_dev->name = "FT5406 memory based driver"; ++ ++ __set_bit(EV_KEY, input_dev->evbit); ++ __set_bit(EV_SYN, input_dev->evbit); ++ __set_bit(EV_ABS, input_dev->evbit); ++ ++ input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, ++ SCREEN_WIDTH, 0, 0); ++ input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, ++ SCREEN_HEIGHT, 0, 0); ++ ++ input_mt_init_slots(input_dev, MAXIMUM_SUPPORTED_POINTS, INPUT_MT_DIRECT); ++ ++ input_set_drvdata(input_dev, ts); ++ ++ ret = input_register_device(input_dev); ++ if (ret) { ++ dev_err(&pdev->dev, "could not register input device, %d\n", ++ ret); ++ return ret; ++ } ++ ++ memset(&request, 0, sizeof request); ++ ++ request.msg_size = sizeof request; ++ request.request_code = VCMSG_PROCESS_REQUEST; ++ request.tag.tag_id = VCMSG_GET_TOUCHBUF; ++ request.tag.buffer_size = 4; ++ request.tag.data_size = 4; ++ ++ bcm_mailbox_property(&request, sizeof(request)); ++ ++ if(request.request_code == VCMSG_REQUEST_SUCCESSFUL) ++ { ++ dev_dbg(&pdev->dev, "Got TS buffer 0x%x\n", request.tag.val); ++ } ++ else ++ { ++ input_unregister_device(input_dev); ++ kzfree(ts); ++ return -1; ++ } ++ ++ // mmap the physical memory ++ request.tag.val &= ~0xc0000000; ++ ts->ts_base = ioremap(request.tag.val, sizeof(*ts->regs)); ++ if(ts->ts_base == NULL) ++ { ++ dev_err(&pdev->dev, "Failed to map physical address\n"); ++ input_unregister_device(input_dev); ++ kzfree(ts); ++ return -1; ++ } ++ ++ ts->regs = (struct ft5406_regs *) ts->ts_base; ++ ++ // create thread to poll the touch events ++ ts->thread = kthread_run(ft5406_thread, ts, "ft5406"); ++ if(ts->thread == NULL) ++ { ++ dev_err(&pdev->dev, "Failed to create kernel thread"); ++ iounmap(ts->ts_base); ++ input_unregister_device(input_dev); ++ kzfree(ts); ++ } ++ ++ return 0; ++} ++ ++static int ft5406_remove(struct platform_device *pdev) ++{ ++ struct ft5406 *ts = (struct ft5406 *) platform_get_drvdata(pdev); ++ ++ dev_info(&pdev->dev, "Removing rpi-ft5406\n"); ++ ++ kthread_stop(ts->thread); ++ iounmap(ts->ts_base); ++ input_unregister_device(ts->input_dev); ++ kzfree(ts); ++ ++ return 0; ++} ++ ++static const struct of_device_id ft5406_match[] = { ++ { .compatible = "rpi,rpi-ft5406", }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, ft5406_match); ++ ++static struct platform_driver ft5406_driver = { ++ .driver = { ++ .name = "rpi-ft5406", ++ .owner = THIS_MODULE, ++ .of_match_table = ft5406_match, ++ }, ++ .probe = ft5406_probe, ++ .remove = ft5406_remove, ++}; ++ ++module_platform_driver(ft5406_driver); ++ ++MODULE_AUTHOR("Gordon Hollingworth"); ++MODULE_DESCRIPTION("Touchscreen driver for memory based FT5406"); ++MODULE_LICENSE("GPL"); +--- a/include/linux/platform_data/mailbox-bcm2708.h ++++ b/include/linux/platform_data/mailbox-bcm2708.h +@@ -115,6 +115,7 @@ enum { + VCMSG_SET_TRANSFORM = 0x0004800d, + VCMSG_TST_VSYNC = 0x0004400e, + VCMSG_SET_VSYNC = 0x0004800e, ++ VCMSG_GET_TOUCHBUF = 0x0004000f, + VCMSG_SET_CURSOR_INFO = 0x00008010, + VCMSG_SET_CURSOR_STATE = 0x00008011, + }; 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