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[media] cec: s5p-cec: Add s5p-cec driver
Add CEC interface driver present in the Samsung Exynos range of SoCs. The following files were based on work by SangPil Moon: - exynos_hdmi_cec.h - exynos_hdmi_cecctl.c Signed-off-by: Kamil Debski <kamil@wypas.org> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Kamil Debski
Mauro Carvalho Chehab
parent
257d4eaed3
commit
1bcbf6f4b6
31
Documentation/devicetree/bindings/media/s5p-cec.txt
Normal file
31
Documentation/devicetree/bindings/media/s5p-cec.txt
Normal file
@ -0,0 +1,31 @@
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* Samsung HDMI CEC driver
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The HDMI CEC module is present is Samsung SoCs and its purpose is to
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handle communication between HDMI connected devices over the CEC bus.
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Required properties:
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- compatible : value should be following
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"samsung,s5p-cec"
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- reg : Physical base address of the IP registers and length of memory
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mapped region.
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- interrupts : HDMI CEC interrupt number to the CPU.
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- clocks : from common clock binding: handle to HDMI CEC clock.
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- clock-names : from common clock binding: must contain "hdmicec",
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corresponding to entry in the clocks property.
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- samsung,syscon-phandle - phandle to the PMU system controller
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Example:
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hdmicec: cec@100B0000 {
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compatible = "samsung,s5p-cec";
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reg = <0x100B0000 0x200>;
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interrupts = <0 114 0>;
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clocks = <&clock CLK_HDMI_CEC>;
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clock-names = "hdmicec";
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samsung,syscon-phandle = <&pmu_system_controller>;
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pinctrl-names = "default";
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pinctrl-0 = <&hdmi_cec>;
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status = "okay";
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};
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@ -1642,6 +1642,13 @@ L: linux-media@vger.kernel.org
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S: Maintained
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F: drivers/media/platform/s5p-tv/
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ARM/SAMSUNG S5P SERIES HDMI CEC SUBSYSTEM SUPPORT
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M: Kyungmin Park <kyungmin.park@samsung.com>
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L: linux-arm-kernel@lists.infradead.org
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L: linux-media@vger.kernel.org
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S: Maintained
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F: drivers/media/platform/s5p-cec/
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ARM/SAMSUNG S5P SERIES JPEG CODEC SUPPORT
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M: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
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M: Jacek Anaszewski <j.anaszewski@samsung.com>
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@ -108,6 +108,16 @@ config VIDEO_S3C_CAMIF
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source "drivers/media/platform/soc_camera/Kconfig"
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source "drivers/media/platform/exynos4-is/Kconfig"
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source "drivers/media/platform/s5p-tv/Kconfig"
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config VIDEO_SAMSUNG_S5P_CEC
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tristate "Samsung S5P CEC driver"
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depends on VIDEO_DEV && MEDIA_CEC && (PLAT_S5P || ARCH_EXYNOS || COMPILE_TEST)
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---help---
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This is a driver for Samsung S5P HDMI CEC interface. It uses the
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generic CEC framework interface.
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CEC bus is present in the HDMI connector and enables communication
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between compatible devices.
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source "drivers/media/platform/am437x/Kconfig"
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source "drivers/media/platform/xilinx/Kconfig"
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source "drivers/media/platform/rcar-vin/Kconfig"
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@ -28,6 +28,7 @@ obj-$(CONFIG_VIDEO_MEM2MEM_DEINTERLACE) += m2m-deinterlace.o
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obj-$(CONFIG_VIDEO_S3C_CAMIF) += s3c-camif/
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obj-$(CONFIG_VIDEO_SAMSUNG_EXYNOS4_IS) += exynos4-is/
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obj-$(CONFIG_VIDEO_SAMSUNG_S5P_CEC) += s5p-cec/
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obj-$(CONFIG_VIDEO_SAMSUNG_S5P_JPEG) += s5p-jpeg/
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obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC) += s5p-mfc/
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obj-$(CONFIG_VIDEO_SAMSUNG_S5P_TV) += s5p-tv/
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2
drivers/media/platform/s5p-cec/Makefile
Normal file
2
drivers/media/platform/s5p-cec/Makefile
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@ -0,0 +1,2 @@
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obj-$(CONFIG_VIDEO_SAMSUNG_S5P_CEC) += s5p-cec.o
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s5p-cec-y += s5p_cec.o exynos_hdmi_cecctrl.o
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38
drivers/media/platform/s5p-cec/exynos_hdmi_cec.h
Normal file
38
drivers/media/platform/s5p-cec/exynos_hdmi_cec.h
Normal file
@ -0,0 +1,38 @@
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/* drivers/media/platform/s5p-cec/exynos_hdmi_cec.h
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*
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* Copyright (c) 2010, 2014 Samsung Electronics
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* http://www.samsung.com/
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*
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* Header file for interface of Samsung Exynos hdmi cec hardware
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _EXYNOS_HDMI_CEC_H_
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#define _EXYNOS_HDMI_CEC_H_ __FILE__
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#include <linux/regmap.h>
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#include <linux/miscdevice.h>
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#include "s5p_cec.h"
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void s5p_cec_set_divider(struct s5p_cec_dev *cec);
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void s5p_cec_enable_rx(struct s5p_cec_dev *cec);
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void s5p_cec_mask_rx_interrupts(struct s5p_cec_dev *cec);
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void s5p_cec_unmask_rx_interrupts(struct s5p_cec_dev *cec);
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void s5p_cec_mask_tx_interrupts(struct s5p_cec_dev *cec);
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void s5p_cec_unmask_tx_interrupts(struct s5p_cec_dev *cec);
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void s5p_cec_reset(struct s5p_cec_dev *cec);
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void s5p_cec_tx_reset(struct s5p_cec_dev *cec);
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void s5p_cec_rx_reset(struct s5p_cec_dev *cec);
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void s5p_cec_threshold(struct s5p_cec_dev *cec);
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void s5p_cec_copy_packet(struct s5p_cec_dev *cec, char *data,
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size_t count, u8 retries);
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void s5p_cec_set_addr(struct s5p_cec_dev *cec, u32 addr);
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u32 s5p_cec_get_status(struct s5p_cec_dev *cec);
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void s5p_clr_pending_tx(struct s5p_cec_dev *cec);
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void s5p_clr_pending_rx(struct s5p_cec_dev *cec);
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void s5p_cec_get_rx_buf(struct s5p_cec_dev *cec, u32 size, u8 *buffer);
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#endif /* _EXYNOS_HDMI_CEC_H_ */
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209
drivers/media/platform/s5p-cec/exynos_hdmi_cecctrl.c
Normal file
209
drivers/media/platform/s5p-cec/exynos_hdmi_cecctrl.c
Normal file
@ -0,0 +1,209 @@
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/* drivers/media/platform/s5p-cec/exynos_hdmi_cecctrl.c
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*
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* Copyright (c) 2009, 2014 Samsung Electronics
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* http://www.samsung.com/
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*
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* cec ftn file for Samsung TVOUT driver
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/io.h>
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#include <linux/device.h>
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#include "exynos_hdmi_cec.h"
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#include "regs-cec.h"
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#define S5P_HDMI_FIN 24000000
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#define CEC_DIV_RATIO 320000
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#define CEC_MESSAGE_BROADCAST_MASK 0x0F
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#define CEC_MESSAGE_BROADCAST 0x0F
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#define CEC_FILTER_THRESHOLD 0x15
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void s5p_cec_set_divider(struct s5p_cec_dev *cec)
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{
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u32 div_ratio, div_val;
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unsigned int reg;
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div_ratio = S5P_HDMI_FIN / CEC_DIV_RATIO - 1;
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if (regmap_read(cec->pmu, EXYNOS_HDMI_PHY_CONTROL, ®)) {
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dev_err(cec->dev, "failed to read phy control\n");
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return;
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}
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reg = (reg & ~(0x3FF << 16)) | (div_ratio << 16);
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if (regmap_write(cec->pmu, EXYNOS_HDMI_PHY_CONTROL, reg)) {
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dev_err(cec->dev, "failed to write phy control\n");
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return;
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}
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div_val = CEC_DIV_RATIO * 0.00005 - 1;
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writeb(0x0, cec->reg + S5P_CEC_DIVISOR_3);
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writeb(0x0, cec->reg + S5P_CEC_DIVISOR_2);
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writeb(0x0, cec->reg + S5P_CEC_DIVISOR_1);
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writeb(div_val, cec->reg + S5P_CEC_DIVISOR_0);
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}
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void s5p_cec_enable_rx(struct s5p_cec_dev *cec)
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{
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u8 reg;
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reg = readb(cec->reg + S5P_CEC_RX_CTRL);
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reg |= S5P_CEC_RX_CTRL_ENABLE;
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writeb(reg, cec->reg + S5P_CEC_RX_CTRL);
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}
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void s5p_cec_mask_rx_interrupts(struct s5p_cec_dev *cec)
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{
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u8 reg;
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reg = readb(cec->reg + S5P_CEC_IRQ_MASK);
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reg |= S5P_CEC_IRQ_RX_DONE;
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reg |= S5P_CEC_IRQ_RX_ERROR;
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writeb(reg, cec->reg + S5P_CEC_IRQ_MASK);
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}
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void s5p_cec_unmask_rx_interrupts(struct s5p_cec_dev *cec)
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{
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u8 reg;
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reg = readb(cec->reg + S5P_CEC_IRQ_MASK);
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reg &= ~S5P_CEC_IRQ_RX_DONE;
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reg &= ~S5P_CEC_IRQ_RX_ERROR;
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writeb(reg, cec->reg + S5P_CEC_IRQ_MASK);
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}
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void s5p_cec_mask_tx_interrupts(struct s5p_cec_dev *cec)
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{
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u8 reg;
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reg = readb(cec->reg + S5P_CEC_IRQ_MASK);
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reg |= S5P_CEC_IRQ_TX_DONE;
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reg |= S5P_CEC_IRQ_TX_ERROR;
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writeb(reg, cec->reg + S5P_CEC_IRQ_MASK);
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}
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void s5p_cec_unmask_tx_interrupts(struct s5p_cec_dev *cec)
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{
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u8 reg;
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reg = readb(cec->reg + S5P_CEC_IRQ_MASK);
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reg &= ~S5P_CEC_IRQ_TX_DONE;
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reg &= ~S5P_CEC_IRQ_TX_ERROR;
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writeb(reg, cec->reg + S5P_CEC_IRQ_MASK);
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}
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void s5p_cec_reset(struct s5p_cec_dev *cec)
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{
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u8 reg;
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writeb(S5P_CEC_RX_CTRL_RESET, cec->reg + S5P_CEC_RX_CTRL);
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writeb(S5P_CEC_TX_CTRL_RESET, cec->reg + S5P_CEC_TX_CTRL);
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reg = readb(cec->reg + 0xc4);
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reg &= ~0x1;
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writeb(reg, cec->reg + 0xc4);
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}
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void s5p_cec_tx_reset(struct s5p_cec_dev *cec)
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{
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writeb(S5P_CEC_TX_CTRL_RESET, cec->reg + S5P_CEC_TX_CTRL);
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}
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void s5p_cec_rx_reset(struct s5p_cec_dev *cec)
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{
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u8 reg;
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writeb(S5P_CEC_RX_CTRL_RESET, cec->reg + S5P_CEC_RX_CTRL);
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reg = readb(cec->reg + 0xc4);
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reg &= ~0x1;
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writeb(reg, cec->reg + 0xc4);
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}
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void s5p_cec_threshold(struct s5p_cec_dev *cec)
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{
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writeb(CEC_FILTER_THRESHOLD, cec->reg + S5P_CEC_RX_FILTER_TH);
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writeb(0, cec->reg + S5P_CEC_RX_FILTER_CTRL);
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}
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void s5p_cec_copy_packet(struct s5p_cec_dev *cec, char *data,
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size_t count, u8 retries)
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{
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int i = 0;
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u8 reg;
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while (i < count) {
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writeb(data[i], cec->reg + (S5P_CEC_TX_BUFF0 + (i * 4)));
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i++;
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}
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writeb(count, cec->reg + S5P_CEC_TX_BYTES);
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reg = readb(cec->reg + S5P_CEC_TX_CTRL);
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reg |= S5P_CEC_TX_CTRL_START;
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reg &= ~0x70;
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reg |= retries << 4;
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if ((data[0] & CEC_MESSAGE_BROADCAST_MASK) == CEC_MESSAGE_BROADCAST) {
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dev_dbg(cec->dev, "Broadcast");
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reg |= S5P_CEC_TX_CTRL_BCAST;
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} else {
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dev_dbg(cec->dev, "No Broadcast");
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reg &= ~S5P_CEC_TX_CTRL_BCAST;
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}
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writeb(reg, cec->reg + S5P_CEC_TX_CTRL);
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dev_dbg(cec->dev, "cec-tx: cec count (%zu): %*ph", count,
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(int)count, data);
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}
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void s5p_cec_set_addr(struct s5p_cec_dev *cec, u32 addr)
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{
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writeb(addr & 0x0F, cec->reg + S5P_CEC_LOGIC_ADDR);
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}
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u32 s5p_cec_get_status(struct s5p_cec_dev *cec)
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{
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u32 status = 0;
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status = readb(cec->reg + S5P_CEC_STATUS_0);
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status |= readb(cec->reg + S5P_CEC_STATUS_1) << 8;
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status |= readb(cec->reg + S5P_CEC_STATUS_2) << 16;
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status |= readb(cec->reg + S5P_CEC_STATUS_3) << 24;
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dev_dbg(cec->dev, "status = 0x%x!\n", status);
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return status;
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}
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void s5p_clr_pending_tx(struct s5p_cec_dev *cec)
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{
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writeb(S5P_CEC_IRQ_TX_DONE | S5P_CEC_IRQ_TX_ERROR,
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cec->reg + S5P_CEC_IRQ_CLEAR);
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}
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void s5p_clr_pending_rx(struct s5p_cec_dev *cec)
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{
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writeb(S5P_CEC_IRQ_RX_DONE | S5P_CEC_IRQ_RX_ERROR,
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cec->reg + S5P_CEC_IRQ_CLEAR);
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}
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void s5p_cec_get_rx_buf(struct s5p_cec_dev *cec, u32 size, u8 *buffer)
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{
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u32 i = 0;
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char debug[40];
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while (i < size) {
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buffer[i] = readb(cec->reg + S5P_CEC_RX_BUFF0 + (i * 4));
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sprintf(debug + i * 2, "%02x ", buffer[i]);
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i++;
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}
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dev_dbg(cec->dev, "cec-rx: cec size(%d): %s", size, debug);
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}
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96
drivers/media/platform/s5p-cec/regs-cec.h
Normal file
96
drivers/media/platform/s5p-cec/regs-cec.h
Normal file
@ -0,0 +1,96 @@
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/* drivers/media/platform/s5p-cec/regs-cec.h
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*
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* Copyright (c) 2010 Samsung Electronics
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* http://www.samsung.com/
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*
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* register header file for Samsung TVOUT driver
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
|
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* published by the Free Software Foundation.
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*/
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#ifndef __EXYNOS_REGS__H
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#define __EXYNOS_REGS__H
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/*
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* Register part
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*/
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#define S5P_CEC_STATUS_0 (0x0000)
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#define S5P_CEC_STATUS_1 (0x0004)
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#define S5P_CEC_STATUS_2 (0x0008)
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#define S5P_CEC_STATUS_3 (0x000C)
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#define S5P_CEC_IRQ_MASK (0x0010)
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#define S5P_CEC_IRQ_CLEAR (0x0014)
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#define S5P_CEC_LOGIC_ADDR (0x0020)
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#define S5P_CEC_DIVISOR_0 (0x0030)
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#define S5P_CEC_DIVISOR_1 (0x0034)
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#define S5P_CEC_DIVISOR_2 (0x0038)
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#define S5P_CEC_DIVISOR_3 (0x003C)
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#define S5P_CEC_TX_CTRL (0x0040)
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#define S5P_CEC_TX_BYTES (0x0044)
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#define S5P_CEC_TX_STAT0 (0x0060)
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#define S5P_CEC_TX_STAT1 (0x0064)
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#define S5P_CEC_TX_BUFF0 (0x0080)
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#define S5P_CEC_TX_BUFF1 (0x0084)
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#define S5P_CEC_TX_BUFF2 (0x0088)
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#define S5P_CEC_TX_BUFF3 (0x008C)
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#define S5P_CEC_TX_BUFF4 (0x0090)
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#define S5P_CEC_TX_BUFF5 (0x0094)
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#define S5P_CEC_TX_BUFF6 (0x0098)
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#define S5P_CEC_TX_BUFF7 (0x009C)
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#define S5P_CEC_TX_BUFF8 (0x00A0)
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#define S5P_CEC_TX_BUFF9 (0x00A4)
|
||||
#define S5P_CEC_TX_BUFF10 (0x00A8)
|
||||
#define S5P_CEC_TX_BUFF11 (0x00AC)
|
||||
#define S5P_CEC_TX_BUFF12 (0x00B0)
|
||||
#define S5P_CEC_TX_BUFF13 (0x00B4)
|
||||
#define S5P_CEC_TX_BUFF14 (0x00B8)
|
||||
#define S5P_CEC_TX_BUFF15 (0x00BC)
|
||||
|
||||
#define S5P_CEC_RX_CTRL (0x00C0)
|
||||
#define S5P_CEC_RX_STAT0 (0x00E0)
|
||||
#define S5P_CEC_RX_STAT1 (0x00E4)
|
||||
#define S5P_CEC_RX_BUFF0 (0x0100)
|
||||
#define S5P_CEC_RX_BUFF1 (0x0104)
|
||||
#define S5P_CEC_RX_BUFF2 (0x0108)
|
||||
#define S5P_CEC_RX_BUFF3 (0x010C)
|
||||
#define S5P_CEC_RX_BUFF4 (0x0110)
|
||||
#define S5P_CEC_RX_BUFF5 (0x0114)
|
||||
#define S5P_CEC_RX_BUFF6 (0x0118)
|
||||
#define S5P_CEC_RX_BUFF7 (0x011C)
|
||||
#define S5P_CEC_RX_BUFF8 (0x0120)
|
||||
#define S5P_CEC_RX_BUFF9 (0x0124)
|
||||
#define S5P_CEC_RX_BUFF10 (0x0128)
|
||||
#define S5P_CEC_RX_BUFF11 (0x012C)
|
||||
#define S5P_CEC_RX_BUFF12 (0x0130)
|
||||
#define S5P_CEC_RX_BUFF13 (0x0134)
|
||||
#define S5P_CEC_RX_BUFF14 (0x0138)
|
||||
#define S5P_CEC_RX_BUFF15 (0x013C)
|
||||
|
||||
#define S5P_CEC_RX_FILTER_CTRL (0x0180)
|
||||
#define S5P_CEC_RX_FILTER_TH (0x0184)
|
||||
|
||||
/*
|
||||
* Bit definition part
|
||||
*/
|
||||
#define S5P_CEC_IRQ_TX_DONE (1<<0)
|
||||
#define S5P_CEC_IRQ_TX_ERROR (1<<1)
|
||||
#define S5P_CEC_IRQ_RX_DONE (1<<4)
|
||||
#define S5P_CEC_IRQ_RX_ERROR (1<<5)
|
||||
|
||||
#define S5P_CEC_TX_CTRL_START (1<<0)
|
||||
#define S5P_CEC_TX_CTRL_BCAST (1<<1)
|
||||
#define S5P_CEC_TX_CTRL_RETRY (0x04<<4)
|
||||
#define S5P_CEC_TX_CTRL_RESET (1<<7)
|
||||
|
||||
#define S5P_CEC_RX_CTRL_ENABLE (1<<0)
|
||||
#define S5P_CEC_RX_CTRL_RESET (1<<7)
|
||||
|
||||
#define S5P_CEC_LOGIC_ADDR_MASK (0xF)
|
||||
|
||||
/* PMU Registers for PHY */
|
||||
#define EXYNOS_HDMI_PHY_CONTROL 0x700
|
||||
|
||||
#endif /* __EXYNOS_REGS__H */
|
||||
295
drivers/media/platform/s5p-cec/s5p_cec.c
Normal file
295
drivers/media/platform/s5p-cec/s5p_cec.c
Normal file
@ -0,0 +1,295 @@
|
||||
/* drivers/media/platform/s5p-cec/s5p_cec.c
|
||||
*
|
||||
* Samsung S5P CEC driver
|
||||
*
|
||||
* Copyright (c) 2014 Samsung Electronics Co., Ltd.
|
||||
*
|
||||
* 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 the "cec interface driver for exynos soc" by
|
||||
* SangPil Moon.
|
||||
*/
|
||||
|
||||
#include <linux/clk.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/mfd/syscon.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/pm_runtime.h>
|
||||
#include <linux/timer.h>
|
||||
#include <linux/version.h>
|
||||
#include <linux/workqueue.h>
|
||||
#include <media/cec.h>
|
||||
|
||||
#include "exynos_hdmi_cec.h"
|
||||
#include "regs-cec.h"
|
||||
#include "s5p_cec.h"
|
||||
|
||||
#define CEC_NAME "s5p-cec"
|
||||
|
||||
static int debug;
|
||||
module_param(debug, int, 0644);
|
||||
MODULE_PARM_DESC(debug, "debug level (0-2)");
|
||||
|
||||
static int s5p_cec_adap_enable(struct cec_adapter *adap, bool enable)
|
||||
{
|
||||
struct s5p_cec_dev *cec = adap->priv;
|
||||
int ret;
|
||||
|
||||
if (enable) {
|
||||
ret = pm_runtime_get_sync(cec->dev);
|
||||
|
||||
s5p_cec_reset(cec);
|
||||
|
||||
s5p_cec_set_divider(cec);
|
||||
s5p_cec_threshold(cec);
|
||||
|
||||
s5p_cec_unmask_tx_interrupts(cec);
|
||||
s5p_cec_unmask_rx_interrupts(cec);
|
||||
s5p_cec_enable_rx(cec);
|
||||
} else {
|
||||
s5p_cec_mask_tx_interrupts(cec);
|
||||
s5p_cec_mask_rx_interrupts(cec);
|
||||
pm_runtime_disable(cec->dev);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int s5p_cec_adap_log_addr(struct cec_adapter *adap, u8 addr)
|
||||
{
|
||||
struct s5p_cec_dev *cec = adap->priv;
|
||||
|
||||
s5p_cec_set_addr(cec, addr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int s5p_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
|
||||
u32 signal_free_time, struct cec_msg *msg)
|
||||
{
|
||||
struct s5p_cec_dev *cec = adap->priv;
|
||||
|
||||
/*
|
||||
* Unclear if 0 retries are allowed by the hardware, so have 1 as
|
||||
* the minimum.
|
||||
*/
|
||||
s5p_cec_copy_packet(cec, msg->msg, msg->len, max(1, attempts - 1));
|
||||
return 0;
|
||||
}
|
||||
|
||||
static irqreturn_t s5p_cec_irq_handler(int irq, void *priv)
|
||||
{
|
||||
struct s5p_cec_dev *cec = priv;
|
||||
u32 status = 0;
|
||||
|
||||
status = s5p_cec_get_status(cec);
|
||||
|
||||
dev_dbg(cec->dev, "irq received\n");
|
||||
|
||||
if (status & CEC_STATUS_TX_DONE) {
|
||||
if (status & CEC_STATUS_TX_ERROR) {
|
||||
dev_dbg(cec->dev, "CEC_STATUS_TX_ERROR set\n");
|
||||
cec->tx = STATE_ERROR;
|
||||
} else {
|
||||
dev_dbg(cec->dev, "CEC_STATUS_TX_DONE\n");
|
||||
cec->tx = STATE_DONE;
|
||||
}
|
||||
s5p_clr_pending_tx(cec);
|
||||
}
|
||||
|
||||
if (status & CEC_STATUS_RX_DONE) {
|
||||
if (status & CEC_STATUS_RX_ERROR) {
|
||||
dev_dbg(cec->dev, "CEC_STATUS_RX_ERROR set\n");
|
||||
s5p_cec_rx_reset(cec);
|
||||
s5p_cec_enable_rx(cec);
|
||||
} else {
|
||||
dev_dbg(cec->dev, "CEC_STATUS_RX_DONE set\n");
|
||||
if (cec->rx != STATE_IDLE)
|
||||
dev_dbg(cec->dev, "Buffer overrun (worker did not process previous message)\n");
|
||||
cec->rx = STATE_BUSY;
|
||||
cec->msg.len = status >> 24;
|
||||
cec->msg.rx_status = CEC_RX_STATUS_OK;
|
||||
s5p_cec_get_rx_buf(cec, cec->msg.len,
|
||||
cec->msg.msg);
|
||||
cec->rx = STATE_DONE;
|
||||
s5p_cec_enable_rx(cec);
|
||||
}
|
||||
/* Clear interrupt pending bit */
|
||||
s5p_clr_pending_rx(cec);
|
||||
}
|
||||
return IRQ_WAKE_THREAD;
|
||||
}
|
||||
|
||||
static irqreturn_t s5p_cec_irq_handler_thread(int irq, void *priv)
|
||||
{
|
||||
struct s5p_cec_dev *cec = priv;
|
||||
|
||||
dev_dbg(cec->dev, "irq processing thread\n");
|
||||
switch (cec->tx) {
|
||||
case STATE_DONE:
|
||||
cec_transmit_done(cec->adap, CEC_TX_STATUS_OK, 0, 0, 0, 0);
|
||||
cec->tx = STATE_IDLE;
|
||||
break;
|
||||
case STATE_ERROR:
|
||||
cec_transmit_done(cec->adap,
|
||||
CEC_TX_STATUS_MAX_RETRIES | CEC_TX_STATUS_ERROR,
|
||||
0, 0, 0, 1);
|
||||
cec->tx = STATE_IDLE;
|
||||
break;
|
||||
case STATE_BUSY:
|
||||
dev_err(cec->dev, "state set to busy, this should not occur here\n");
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
switch (cec->rx) {
|
||||
case STATE_DONE:
|
||||
cec_received_msg(cec->adap, &cec->msg);
|
||||
cec->rx = STATE_IDLE;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static const struct cec_adap_ops s5p_cec_adap_ops = {
|
||||
.adap_enable = s5p_cec_adap_enable,
|
||||
.adap_log_addr = s5p_cec_adap_log_addr,
|
||||
.adap_transmit = s5p_cec_adap_transmit,
|
||||
};
|
||||
|
||||
static int s5p_cec_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct resource *res;
|
||||
struct s5p_cec_dev *cec;
|
||||
int ret;
|
||||
|
||||
cec = devm_kzalloc(&pdev->dev, sizeof(*cec), GFP_KERNEL);
|
||||
if (!dev)
|
||||
return -ENOMEM;
|
||||
|
||||
cec->dev = dev;
|
||||
|
||||
cec->irq = platform_get_irq(pdev, 0);
|
||||
if (cec->irq < 0)
|
||||
return cec->irq;
|
||||
|
||||
ret = devm_request_threaded_irq(dev, cec->irq, s5p_cec_irq_handler,
|
||||
s5p_cec_irq_handler_thread, 0, pdev->name, cec);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
cec->clk = devm_clk_get(dev, "hdmicec");
|
||||
if (IS_ERR(cec->clk))
|
||||
return PTR_ERR(cec->clk);
|
||||
|
||||
cec->pmu = syscon_regmap_lookup_by_phandle(dev->of_node,
|
||||
"samsung,syscon-phandle");
|
||||
if (IS_ERR(cec->pmu))
|
||||
return -EPROBE_DEFER;
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
cec->reg = devm_ioremap_resource(dev, res);
|
||||
if (IS_ERR(cec->reg))
|
||||
return PTR_ERR(cec->reg);
|
||||
|
||||
cec->adap = cec_allocate_adapter(&s5p_cec_adap_ops, cec,
|
||||
CEC_NAME,
|
||||
CEC_CAP_PHYS_ADDR | CEC_CAP_LOG_ADDRS | CEC_CAP_TRANSMIT |
|
||||
CEC_CAP_PASSTHROUGH | CEC_CAP_RC,
|
||||
1, &pdev->dev);
|
||||
ret = PTR_ERR_OR_ZERO(cec->adap);
|
||||
if (ret)
|
||||
return ret;
|
||||
ret = cec_register_adapter(cec->adap);
|
||||
if (ret) {
|
||||
cec_delete_adapter(cec->adap);
|
||||
return ret;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, cec);
|
||||
pm_runtime_enable(dev);
|
||||
|
||||
dev_dbg(dev, "successfuly probed\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int s5p_cec_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct s5p_cec_dev *cec = platform_get_drvdata(pdev);
|
||||
|
||||
cec_unregister_adapter(cec->adap);
|
||||
pm_runtime_disable(&pdev->dev);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int s5p_cec_runtime_suspend(struct device *dev)
|
||||
{
|
||||
struct s5p_cec_dev *cec = dev_get_drvdata(dev);
|
||||
|
||||
clk_disable_unprepare(cec->clk);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int s5p_cec_runtime_resume(struct device *dev)
|
||||
{
|
||||
struct s5p_cec_dev *cec = dev_get_drvdata(dev);
|
||||
int ret;
|
||||
|
||||
ret = clk_prepare_enable(cec->clk);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int s5p_cec_suspend(struct device *dev)
|
||||
{
|
||||
if (pm_runtime_suspended(dev))
|
||||
return 0;
|
||||
return s5p_cec_runtime_suspend(dev);
|
||||
}
|
||||
|
||||
static int s5p_cec_resume(struct device *dev)
|
||||
{
|
||||
if (pm_runtime_suspended(dev))
|
||||
return 0;
|
||||
return s5p_cec_runtime_resume(dev);
|
||||
}
|
||||
|
||||
static const struct dev_pm_ops s5p_cec_pm_ops = {
|
||||
SET_SYSTEM_SLEEP_PM_OPS(s5p_cec_suspend, s5p_cec_resume)
|
||||
SET_RUNTIME_PM_OPS(s5p_cec_runtime_suspend, s5p_cec_runtime_resume,
|
||||
NULL)
|
||||
};
|
||||
|
||||
static const struct of_device_id s5p_cec_match[] = {
|
||||
{
|
||||
.compatible = "samsung,s5p-cec",
|
||||
},
|
||||
{},
|
||||
};
|
||||
|
||||
static struct platform_driver s5p_cec_pdrv = {
|
||||
.probe = s5p_cec_probe,
|
||||
.remove = s5p_cec_remove,
|
||||
.driver = {
|
||||
.name = CEC_NAME,
|
||||
.of_match_table = s5p_cec_match,
|
||||
.pm = &s5p_cec_pm_ops,
|
||||
},
|
||||
};
|
||||
|
||||
module_platform_driver(s5p_cec_pdrv);
|
||||
|
||||
MODULE_AUTHOR("Kamil Debski <kamil@wypas.org>");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Samsung S5P CEC driver");
|
||||
76
drivers/media/platform/s5p-cec/s5p_cec.h
Normal file
76
drivers/media/platform/s5p-cec/s5p_cec.h
Normal file
@ -0,0 +1,76 @@
|
||||
/* drivers/media/platform/s5p-cec/s5p_cec.h
|
||||
*
|
||||
* Samsung S5P HDMI CEC driver
|
||||
*
|
||||
* Copyright (c) 2014 Samsung Electronics Co., Ltd.
|
||||
*
|
||||
* 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 _S5P_CEC_H_
|
||||
#define _S5P_CEC_H_ __FILE__
|
||||
|
||||
#include <linux/clk.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/mfd/syscon.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/pm_runtime.h>
|
||||
#include <linux/timer.h>
|
||||
#include <linux/version.h>
|
||||
#include <linux/workqueue.h>
|
||||
#include <media/cec.h>
|
||||
|
||||
#include "exynos_hdmi_cec.h"
|
||||
#include "regs-cec.h"
|
||||
#include "s5p_cec.h"
|
||||
|
||||
#define CEC_NAME "s5p-cec"
|
||||
|
||||
#define CEC_STATUS_TX_RUNNING (1 << 0)
|
||||
#define CEC_STATUS_TX_TRANSFERRING (1 << 1)
|
||||
#define CEC_STATUS_TX_DONE (1 << 2)
|
||||
#define CEC_STATUS_TX_ERROR (1 << 3)
|
||||
#define CEC_STATUS_TX_BYTES (0xFF << 8)
|
||||
#define CEC_STATUS_RX_RUNNING (1 << 16)
|
||||
#define CEC_STATUS_RX_RECEIVING (1 << 17)
|
||||
#define CEC_STATUS_RX_DONE (1 << 18)
|
||||
#define CEC_STATUS_RX_ERROR (1 << 19)
|
||||
#define CEC_STATUS_RX_BCAST (1 << 20)
|
||||
#define CEC_STATUS_RX_BYTES (0xFF << 24)
|
||||
|
||||
#define CEC_WORKER_TX_DONE (1 << 0)
|
||||
#define CEC_WORKER_RX_MSG (1 << 1)
|
||||
|
||||
/* CEC Rx buffer size */
|
||||
#define CEC_RX_BUFF_SIZE 16
|
||||
/* CEC Tx buffer size */
|
||||
#define CEC_TX_BUFF_SIZE 16
|
||||
|
||||
enum cec_state {
|
||||
STATE_IDLE,
|
||||
STATE_BUSY,
|
||||
STATE_DONE,
|
||||
STATE_ERROR
|
||||
};
|
||||
|
||||
struct s5p_cec_dev {
|
||||
struct cec_adapter *adap;
|
||||
struct clk *clk;
|
||||
struct device *dev;
|
||||
struct mutex lock;
|
||||
struct regmap *pmu;
|
||||
int irq;
|
||||
void __iomem *reg;
|
||||
|
||||
enum cec_state rx;
|
||||
enum cec_state tx;
|
||||
struct cec_msg msg;
|
||||
};
|
||||
|
||||
#endif /* _S5P_CEC_H_ */
|
||||
Loading…
Reference in New Issue
Block a user