diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0139-rpi-ft5406-Use-firmware-API.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.1/0139-rpi-ft5406-Use-firmware-API.patch | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0139-rpi-ft5406-Use-firmware-API.patch b/target/linux/brcm2708/patches-4.1/0139-rpi-ft5406-Use-firmware-API.patch new file mode 100644 index 0000000..eabd2cb --- /dev/null +++ b/target/linux/brcm2708/patches-4.1/0139-rpi-ft5406-Use-firmware-API.patch @@ -0,0 +1,138 @@ +From 193a0cacacc91b8c5c3224d0090f342ccd64f45c Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org> +Date: Tue, 21 Jul 2015 19:09:39 +0200 +Subject: [PATCH 139/148] rpi-ft5406: Use firmware API +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Signed-off-by: Noralf Trønnes <noralf@tronnes.org> +--- + arch/arm/boot/dts/overlays/rpi-ft5406-overlay.dts | 1 + + drivers/input/touchscreen/rpi-ft5406.c | 74 ++++++++++------------- + 2 files changed, 32 insertions(+), 43 deletions(-) + +--- a/arch/arm/boot/dts/overlays/rpi-ft5406-overlay.dts ++++ b/arch/arm/boot/dts/overlays/rpi-ft5406-overlay.dts +@@ -9,6 +9,7 @@ + __overlay__ { + rpi_ft5406: rpi_ft5406 { + compatible = "rpi,rpi-ft5406"; ++ firmware = <&firmware>; + status = "okay"; + }; + }; +--- a/drivers/input/touchscreen/rpi-ft5406.c ++++ b/drivers/input/touchscreen/rpi-ft5406.c +@@ -21,7 +21,7 @@ + #include <linux/kthread.h> + #include <linux/platform_device.h> + #include <asm/io.h> +-#include <linux/platform_data/mailbox-bcm2708.h> ++#include <soc/bcm2835/raspberrypi-firmware.h> + + #define MAXIMUM_SUPPORTED_POINTS 10 + struct ft5406_regs { +@@ -49,23 +49,6 @@ struct ft5406 { + 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 +@@ -136,11 +119,37 @@ static int ft5406_probe(struct platform_ + { + int ret; + struct input_dev * input_dev = input_allocate_device(); +- struct vc_msg request; + struct ft5406 * ts; ++ struct device_node *fw_node; ++ struct rpi_firmware *fw; ++ u32 touchbuf; + + dev_info(&pdev->dev, "Probing device\n"); + ++ fw_node = of_parse_phandle(pdev->dev.of_node, "firmware", 0); ++ if (!fw_node) { ++ dev_err(&pdev->dev, "Missing firmware node\n"); ++ return -ENOENT; ++ } ++ ++ fw = rpi_firmware_get(fw_node); ++ if (!fw) ++ return -EPROBE_DEFER; ++ ++ ret = rpi_firmware_property(fw, RPI_FIRMWARE_FRAMEBUFFER_GET_TOUCHBUF, ++ &touchbuf, sizeof(touchbuf)); ++ if (ret) { ++ dev_err(&pdev->dev, "Failed to get touch buffer\n"); ++ return ret; ++ } ++ ++ if (!touchbuf) { ++ dev_err(&pdev->dev, "Touchscreen not detected\n"); ++ return -ENODEV; ++ } ++ ++ dev_dbg(&pdev->dev, "Got TS buffer 0x%x\n", touchbuf); ++ + ts = kzalloc(sizeof(struct ft5406), GFP_KERNEL); + + if (!ts || !input_dev) { +@@ -174,36 +183,15 @@ static int ft5406_probe(struct platform_ + 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 && request.tag.val != 0) +- { +- 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)); ++ touchbuf &= ~0xc0000000; ++ ts->ts_base = ioremap(touchbuf, 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; ++ return -ENOMEM; + } + + ts->regs = (struct ft5406_regs *) ts->ts_base; |