From: Mauro Carvalho Chehab Date: Tue, 28 Jun 2016 14:36:02 +0000 (-0300) Subject: [media] move s5p-cec to staging X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=78fc853b5532b22639e691357fd59aa19833d81a;p=deliverable%2Flinux.git [media] move s5p-cec to staging As the CEC core is currently at staging, it doesn't make any sense to put a dependent driver outside staging. So, move it also to staging. Signed-off-by: Mauro Carvalho Chehab --- diff --git a/MAINTAINERS b/MAINTAINERS index 7f76a3bf069f..962c5b0d2a3d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1647,7 +1647,7 @@ M: Kyungmin Park L: linux-arm-kernel@lists.infradead.org L: linux-media@vger.kernel.org S: Maintained -F: drivers/media/platform/s5p-cec/ +F: drivers/staging/media/platform/s5p-cec/ ARM/SAMSUNG S5P SERIES JPEG CODEC SUPPORT M: Andrzej Pietrasiewicz diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig index 567717583246..382f3937379e 100644 --- a/drivers/media/platform/Kconfig +++ b/drivers/media/platform/Kconfig @@ -108,16 +108,6 @@ config VIDEO_S3C_CAMIF source "drivers/media/platform/soc_camera/Kconfig" source "drivers/media/platform/exynos4-is/Kconfig" source "drivers/media/platform/s5p-tv/Kconfig" - -config VIDEO_SAMSUNG_S5P_CEC - tristate "Samsung S5P CEC driver" - depends on VIDEO_DEV && MEDIA_CEC && (PLAT_S5P || ARCH_EXYNOS || COMPILE_TEST) - ---help--- - This is a driver for Samsung S5P HDMI CEC interface. It uses the - generic CEC framework interface. - CEC bus is present in the HDMI connector and enables communication - between compatible devices. - source "drivers/media/platform/am437x/Kconfig" source "drivers/media/platform/xilinx/Kconfig" source "drivers/media/platform/rcar-vin/Kconfig" diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile index 9a2fe9513282..99cf31542f54 100644 --- a/drivers/media/platform/Makefile +++ b/drivers/media/platform/Makefile @@ -28,7 +28,6 @@ obj-$(CONFIG_VIDEO_MEM2MEM_DEINTERLACE) += m2m-deinterlace.o obj-$(CONFIG_VIDEO_S3C_CAMIF) += s3c-camif/ obj-$(CONFIG_VIDEO_SAMSUNG_EXYNOS4_IS) += exynos4-is/ -obj-$(CONFIG_VIDEO_SAMSUNG_S5P_CEC) += s5p-cec/ obj-$(CONFIG_VIDEO_SAMSUNG_S5P_JPEG) += s5p-jpeg/ obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC) += s5p-mfc/ obj-$(CONFIG_VIDEO_SAMSUNG_S5P_TV) += s5p-tv/ diff --git a/drivers/media/platform/s5p-cec/Makefile b/drivers/media/platform/s5p-cec/Makefile deleted file mode 100644 index 0e2cf457825a..000000000000 --- a/drivers/media/platform/s5p-cec/Makefile +++ /dev/null @@ -1,2 +0,0 @@ -obj-$(CONFIG_VIDEO_SAMSUNG_S5P_CEC) += s5p-cec.o -s5p-cec-y += s5p_cec.o exynos_hdmi_cecctrl.o diff --git a/drivers/media/platform/s5p-cec/exynos_hdmi_cec.h b/drivers/media/platform/s5p-cec/exynos_hdmi_cec.h deleted file mode 100644 index 3e4fc7b05e83..000000000000 --- a/drivers/media/platform/s5p-cec/exynos_hdmi_cec.h +++ /dev/null @@ -1,38 +0,0 @@ -/* drivers/media/platform/s5p-cec/exynos_hdmi_cec.h - * - * Copyright (c) 2010, 2014 Samsung Electronics - * http://www.samsung.com/ - * - * Header file for interface of Samsung Exynos hdmi cec hardware - * - * 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. - */ - -#ifndef _EXYNOS_HDMI_CEC_H_ -#define _EXYNOS_HDMI_CEC_H_ __FILE__ - -#include -#include -#include "s5p_cec.h" - -void s5p_cec_set_divider(struct s5p_cec_dev *cec); -void s5p_cec_enable_rx(struct s5p_cec_dev *cec); -void s5p_cec_mask_rx_interrupts(struct s5p_cec_dev *cec); -void s5p_cec_unmask_rx_interrupts(struct s5p_cec_dev *cec); -void s5p_cec_mask_tx_interrupts(struct s5p_cec_dev *cec); -void s5p_cec_unmask_tx_interrupts(struct s5p_cec_dev *cec); -void s5p_cec_reset(struct s5p_cec_dev *cec); -void s5p_cec_tx_reset(struct s5p_cec_dev *cec); -void s5p_cec_rx_reset(struct s5p_cec_dev *cec); -void s5p_cec_threshold(struct s5p_cec_dev *cec); -void s5p_cec_copy_packet(struct s5p_cec_dev *cec, char *data, - size_t count, u8 retries); -void s5p_cec_set_addr(struct s5p_cec_dev *cec, u32 addr); -u32 s5p_cec_get_status(struct s5p_cec_dev *cec); -void s5p_clr_pending_tx(struct s5p_cec_dev *cec); -void s5p_clr_pending_rx(struct s5p_cec_dev *cec); -void s5p_cec_get_rx_buf(struct s5p_cec_dev *cec, u32 size, u8 *buffer); - -#endif /* _EXYNOS_HDMI_CEC_H_ */ diff --git a/drivers/media/platform/s5p-cec/exynos_hdmi_cecctrl.c b/drivers/media/platform/s5p-cec/exynos_hdmi_cecctrl.c deleted file mode 100644 index ce95e0fcd882..000000000000 --- a/drivers/media/platform/s5p-cec/exynos_hdmi_cecctrl.c +++ /dev/null @@ -1,209 +0,0 @@ -/* drivers/media/platform/s5p-cec/exynos_hdmi_cecctrl.c - * - * Copyright (c) 2009, 2014 Samsung Electronics - * http://www.samsung.com/ - * - * cec ftn file for Samsung TVOUT driver - * - * 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 -#include - -#include "exynos_hdmi_cec.h" -#include "regs-cec.h" - -#define S5P_HDMI_FIN 24000000 -#define CEC_DIV_RATIO 320000 - -#define CEC_MESSAGE_BROADCAST_MASK 0x0F -#define CEC_MESSAGE_BROADCAST 0x0F -#define CEC_FILTER_THRESHOLD 0x15 - -void s5p_cec_set_divider(struct s5p_cec_dev *cec) -{ - u32 div_ratio, div_val; - unsigned int reg; - - div_ratio = S5P_HDMI_FIN / CEC_DIV_RATIO - 1; - - if (regmap_read(cec->pmu, EXYNOS_HDMI_PHY_CONTROL, ®)) { - dev_err(cec->dev, "failed to read phy control\n"); - return; - } - - reg = (reg & ~(0x3FF << 16)) | (div_ratio << 16); - - if (regmap_write(cec->pmu, EXYNOS_HDMI_PHY_CONTROL, reg)) { - dev_err(cec->dev, "failed to write phy control\n"); - return; - } - - div_val = CEC_DIV_RATIO * 0.00005 - 1; - - writeb(0x0, cec->reg + S5P_CEC_DIVISOR_3); - writeb(0x0, cec->reg + S5P_CEC_DIVISOR_2); - writeb(0x0, cec->reg + S5P_CEC_DIVISOR_1); - writeb(div_val, cec->reg + S5P_CEC_DIVISOR_0); -} - -void s5p_cec_enable_rx(struct s5p_cec_dev *cec) -{ - u8 reg; - - reg = readb(cec->reg + S5P_CEC_RX_CTRL); - reg |= S5P_CEC_RX_CTRL_ENABLE; - writeb(reg, cec->reg + S5P_CEC_RX_CTRL); -} - -void s5p_cec_mask_rx_interrupts(struct s5p_cec_dev *cec) -{ - u8 reg; - - reg = readb(cec->reg + S5P_CEC_IRQ_MASK); - reg |= S5P_CEC_IRQ_RX_DONE; - reg |= S5P_CEC_IRQ_RX_ERROR; - writeb(reg, cec->reg + S5P_CEC_IRQ_MASK); -} - -void s5p_cec_unmask_rx_interrupts(struct s5p_cec_dev *cec) -{ - u8 reg; - - reg = readb(cec->reg + S5P_CEC_IRQ_MASK); - reg &= ~S5P_CEC_IRQ_RX_DONE; - reg &= ~S5P_CEC_IRQ_RX_ERROR; - writeb(reg, cec->reg + S5P_CEC_IRQ_MASK); -} - -void s5p_cec_mask_tx_interrupts(struct s5p_cec_dev *cec) -{ - u8 reg; - - reg = readb(cec->reg + S5P_CEC_IRQ_MASK); - reg |= S5P_CEC_IRQ_TX_DONE; - reg |= S5P_CEC_IRQ_TX_ERROR; - writeb(reg, cec->reg + S5P_CEC_IRQ_MASK); - -} - -void s5p_cec_unmask_tx_interrupts(struct s5p_cec_dev *cec) -{ - u8 reg; - - reg = readb(cec->reg + S5P_CEC_IRQ_MASK); - reg &= ~S5P_CEC_IRQ_TX_DONE; - reg &= ~S5P_CEC_IRQ_TX_ERROR; - writeb(reg, cec->reg + S5P_CEC_IRQ_MASK); -} - -void s5p_cec_reset(struct s5p_cec_dev *cec) -{ - u8 reg; - - writeb(S5P_CEC_RX_CTRL_RESET, cec->reg + S5P_CEC_RX_CTRL); - writeb(S5P_CEC_TX_CTRL_RESET, cec->reg + S5P_CEC_TX_CTRL); - - reg = readb(cec->reg + 0xc4); - reg &= ~0x1; - writeb(reg, cec->reg + 0xc4); -} - -void s5p_cec_tx_reset(struct s5p_cec_dev *cec) -{ - writeb(S5P_CEC_TX_CTRL_RESET, cec->reg + S5P_CEC_TX_CTRL); -} - -void s5p_cec_rx_reset(struct s5p_cec_dev *cec) -{ - u8 reg; - - writeb(S5P_CEC_RX_CTRL_RESET, cec->reg + S5P_CEC_RX_CTRL); - - reg = readb(cec->reg + 0xc4); - reg &= ~0x1; - writeb(reg, cec->reg + 0xc4); -} - -void s5p_cec_threshold(struct s5p_cec_dev *cec) -{ - writeb(CEC_FILTER_THRESHOLD, cec->reg + S5P_CEC_RX_FILTER_TH); - writeb(0, cec->reg + S5P_CEC_RX_FILTER_CTRL); -} - -void s5p_cec_copy_packet(struct s5p_cec_dev *cec, char *data, - size_t count, u8 retries) -{ - int i = 0; - u8 reg; - - while (i < count) { - writeb(data[i], cec->reg + (S5P_CEC_TX_BUFF0 + (i * 4))); - i++; - } - - writeb(count, cec->reg + S5P_CEC_TX_BYTES); - reg = readb(cec->reg + S5P_CEC_TX_CTRL); - reg |= S5P_CEC_TX_CTRL_START; - reg &= ~0x70; - reg |= retries << 4; - - if ((data[0] & CEC_MESSAGE_BROADCAST_MASK) == CEC_MESSAGE_BROADCAST) { - dev_dbg(cec->dev, "Broadcast"); - reg |= S5P_CEC_TX_CTRL_BCAST; - } else { - dev_dbg(cec->dev, "No Broadcast"); - reg &= ~S5P_CEC_TX_CTRL_BCAST; - } - - writeb(reg, cec->reg + S5P_CEC_TX_CTRL); - dev_dbg(cec->dev, "cec-tx: cec count (%zu): %*ph", count, - (int)count, data); -} - -void s5p_cec_set_addr(struct s5p_cec_dev *cec, u32 addr) -{ - writeb(addr & 0x0F, cec->reg + S5P_CEC_LOGIC_ADDR); -} - -u32 s5p_cec_get_status(struct s5p_cec_dev *cec) -{ - u32 status = 0; - - status = readb(cec->reg + S5P_CEC_STATUS_0); - status |= readb(cec->reg + S5P_CEC_STATUS_1) << 8; - status |= readb(cec->reg + S5P_CEC_STATUS_2) << 16; - status |= readb(cec->reg + S5P_CEC_STATUS_3) << 24; - - dev_dbg(cec->dev, "status = 0x%x!\n", status); - - return status; -} - -void s5p_clr_pending_tx(struct s5p_cec_dev *cec) -{ - writeb(S5P_CEC_IRQ_TX_DONE | S5P_CEC_IRQ_TX_ERROR, - cec->reg + S5P_CEC_IRQ_CLEAR); -} - -void s5p_clr_pending_rx(struct s5p_cec_dev *cec) -{ - writeb(S5P_CEC_IRQ_RX_DONE | S5P_CEC_IRQ_RX_ERROR, - cec->reg + S5P_CEC_IRQ_CLEAR); -} - -void s5p_cec_get_rx_buf(struct s5p_cec_dev *cec, u32 size, u8 *buffer) -{ - u32 i = 0; - char debug[40]; - - while (i < size) { - buffer[i] = readb(cec->reg + S5P_CEC_RX_BUFF0 + (i * 4)); - sprintf(debug + i * 2, "%02x ", buffer[i]); - i++; - } - dev_dbg(cec->dev, "cec-rx: cec size(%d): %s", size, debug); -} diff --git a/drivers/media/platform/s5p-cec/regs-cec.h b/drivers/media/platform/s5p-cec/regs-cec.h deleted file mode 100644 index b2e7e129920e..000000000000 --- a/drivers/media/platform/s5p-cec/regs-cec.h +++ /dev/null @@ -1,96 +0,0 @@ -/* drivers/media/platform/s5p-cec/regs-cec.h - * - * Copyright (c) 2010 Samsung Electronics - * http://www.samsung.com/ - * - * register header file for Samsung TVOUT driver - * - * 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. - */ - -#ifndef __EXYNOS_REGS__H -#define __EXYNOS_REGS__H - -/* - * Register part - */ -#define S5P_CEC_STATUS_0 (0x0000) -#define S5P_CEC_STATUS_1 (0x0004) -#define S5P_CEC_STATUS_2 (0x0008) -#define S5P_CEC_STATUS_3 (0x000C) -#define S5P_CEC_IRQ_MASK (0x0010) -#define S5P_CEC_IRQ_CLEAR (0x0014) -#define S5P_CEC_LOGIC_ADDR (0x0020) -#define S5P_CEC_DIVISOR_0 (0x0030) -#define S5P_CEC_DIVISOR_1 (0x0034) -#define S5P_CEC_DIVISOR_2 (0x0038) -#define S5P_CEC_DIVISOR_3 (0x003C) - -#define S5P_CEC_TX_CTRL (0x0040) -#define S5P_CEC_TX_BYTES (0x0044) -#define S5P_CEC_TX_STAT0 (0x0060) -#define S5P_CEC_TX_STAT1 (0x0064) -#define S5P_CEC_TX_BUFF0 (0x0080) -#define S5P_CEC_TX_BUFF1 (0x0084) -#define S5P_CEC_TX_BUFF2 (0x0088) -#define S5P_CEC_TX_BUFF3 (0x008C) -#define S5P_CEC_TX_BUFF4 (0x0090) -#define S5P_CEC_TX_BUFF5 (0x0094) -#define S5P_CEC_TX_BUFF6 (0x0098) -#define S5P_CEC_TX_BUFF7 (0x009C) -#define S5P_CEC_TX_BUFF8 (0x00A0) -#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 */ diff --git a/drivers/media/platform/s5p-cec/s5p_cec.c b/drivers/media/platform/s5p-cec/s5p_cec.c deleted file mode 100644 index 3844f3915220..000000000000 --- a/drivers/media/platform/s5p-cec/s5p_cec.c +++ /dev/null @@ -1,295 +0,0 @@ -/* 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#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 "); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Samsung S5P CEC driver"); diff --git a/drivers/media/platform/s5p-cec/s5p_cec.h b/drivers/media/platform/s5p-cec/s5p_cec.h deleted file mode 100644 index 03732c13d19f..000000000000 --- a/drivers/media/platform/s5p-cec/s5p_cec.h +++ /dev/null @@ -1,76 +0,0 @@ -/* 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#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_ */ diff --git a/drivers/staging/media/Kconfig b/drivers/staging/media/Kconfig index 7ce679eb87e1..567078986c94 100644 --- a/drivers/staging/media/Kconfig +++ b/drivers/staging/media/Kconfig @@ -31,6 +31,8 @@ source "drivers/staging/media/omap4iss/Kconfig" source "drivers/staging/media/tw686x-kh/Kconfig" +source "drivers/staging/media/s5p-cec/Kconfig" + # Keep LIRC at the end, as it has sub-menus source "drivers/staging/media/lirc/Kconfig" diff --git a/drivers/staging/media/Makefile b/drivers/staging/media/Makefile index 2d213dd54bc3..989c844f4996 100644 --- a/drivers/staging/media/Makefile +++ b/drivers/staging/media/Makefile @@ -1,5 +1,6 @@ obj-$(CONFIG_I2C_BCM2048) += bcm2048/ obj-$(CONFIG_MEDIA_CEC) += cec/ +obj-$(CONFIG_VIDEO_SAMSUNG_S5P_CEC) += s5p-cec/ obj-$(CONFIG_DVB_CXD2099) += cxd2099/ obj-$(CONFIG_LIRC_STAGING) += lirc/ obj-$(CONFIG_VIDEO_DM365_VPFE) += davinci_vpfe/ diff --git a/drivers/staging/media/s5p-cec/Kconfig b/drivers/staging/media/s5p-cec/Kconfig new file mode 100644 index 000000000000..0315fd7ad0f1 --- /dev/null +++ b/drivers/staging/media/s5p-cec/Kconfig @@ -0,0 +1,9 @@ +config VIDEO_SAMSUNG_S5P_CEC + tristate "Samsung S5P CEC driver" + depends on VIDEO_DEV && MEDIA_CEC && (PLAT_S5P || ARCH_EXYNOS || COMPILE_TEST) + ---help--- + This is a driver for Samsung S5P HDMI CEC interface. It uses the + generic CEC framework interface. + CEC bus is present in the HDMI connector and enables communication + between compatible devices. + diff --git a/drivers/staging/media/s5p-cec/Makefile b/drivers/staging/media/s5p-cec/Makefile new file mode 100644 index 000000000000..0e2cf457825a --- /dev/null +++ b/drivers/staging/media/s5p-cec/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_VIDEO_SAMSUNG_S5P_CEC) += s5p-cec.o +s5p-cec-y += s5p_cec.o exynos_hdmi_cecctrl.o diff --git a/drivers/staging/media/s5p-cec/TODO b/drivers/staging/media/s5p-cec/TODO new file mode 100644 index 000000000000..7162f9ae0d26 --- /dev/null +++ b/drivers/staging/media/s5p-cec/TODO @@ -0,0 +1,3 @@ +There's nothing wrong on this driver, except that it depends on +the media staging core, that it is currently at staging. So, +this should be kept here while the core is not promoted. diff --git a/drivers/staging/media/s5p-cec/exynos_hdmi_cec.h b/drivers/staging/media/s5p-cec/exynos_hdmi_cec.h new file mode 100644 index 000000000000..3e4fc7b05e83 --- /dev/null +++ b/drivers/staging/media/s5p-cec/exynos_hdmi_cec.h @@ -0,0 +1,38 @@ +/* drivers/media/platform/s5p-cec/exynos_hdmi_cec.h + * + * Copyright (c) 2010, 2014 Samsung Electronics + * http://www.samsung.com/ + * + * Header file for interface of Samsung Exynos hdmi cec hardware + * + * 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. + */ + +#ifndef _EXYNOS_HDMI_CEC_H_ +#define _EXYNOS_HDMI_CEC_H_ __FILE__ + +#include +#include +#include "s5p_cec.h" + +void s5p_cec_set_divider(struct s5p_cec_dev *cec); +void s5p_cec_enable_rx(struct s5p_cec_dev *cec); +void s5p_cec_mask_rx_interrupts(struct s5p_cec_dev *cec); +void s5p_cec_unmask_rx_interrupts(struct s5p_cec_dev *cec); +void s5p_cec_mask_tx_interrupts(struct s5p_cec_dev *cec); +void s5p_cec_unmask_tx_interrupts(struct s5p_cec_dev *cec); +void s5p_cec_reset(struct s5p_cec_dev *cec); +void s5p_cec_tx_reset(struct s5p_cec_dev *cec); +void s5p_cec_rx_reset(struct s5p_cec_dev *cec); +void s5p_cec_threshold(struct s5p_cec_dev *cec); +void s5p_cec_copy_packet(struct s5p_cec_dev *cec, char *data, + size_t count, u8 retries); +void s5p_cec_set_addr(struct s5p_cec_dev *cec, u32 addr); +u32 s5p_cec_get_status(struct s5p_cec_dev *cec); +void s5p_clr_pending_tx(struct s5p_cec_dev *cec); +void s5p_clr_pending_rx(struct s5p_cec_dev *cec); +void s5p_cec_get_rx_buf(struct s5p_cec_dev *cec, u32 size, u8 *buffer); + +#endif /* _EXYNOS_HDMI_CEC_H_ */ diff --git a/drivers/staging/media/s5p-cec/exynos_hdmi_cecctrl.c b/drivers/staging/media/s5p-cec/exynos_hdmi_cecctrl.c new file mode 100644 index 000000000000..ce95e0fcd882 --- /dev/null +++ b/drivers/staging/media/s5p-cec/exynos_hdmi_cecctrl.c @@ -0,0 +1,209 @@ +/* drivers/media/platform/s5p-cec/exynos_hdmi_cecctrl.c + * + * Copyright (c) 2009, 2014 Samsung Electronics + * http://www.samsung.com/ + * + * cec ftn file for Samsung TVOUT driver + * + * 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 +#include + +#include "exynos_hdmi_cec.h" +#include "regs-cec.h" + +#define S5P_HDMI_FIN 24000000 +#define CEC_DIV_RATIO 320000 + +#define CEC_MESSAGE_BROADCAST_MASK 0x0F +#define CEC_MESSAGE_BROADCAST 0x0F +#define CEC_FILTER_THRESHOLD 0x15 + +void s5p_cec_set_divider(struct s5p_cec_dev *cec) +{ + u32 div_ratio, div_val; + unsigned int reg; + + div_ratio = S5P_HDMI_FIN / CEC_DIV_RATIO - 1; + + if (regmap_read(cec->pmu, EXYNOS_HDMI_PHY_CONTROL, ®)) { + dev_err(cec->dev, "failed to read phy control\n"); + return; + } + + reg = (reg & ~(0x3FF << 16)) | (div_ratio << 16); + + if (regmap_write(cec->pmu, EXYNOS_HDMI_PHY_CONTROL, reg)) { + dev_err(cec->dev, "failed to write phy control\n"); + return; + } + + div_val = CEC_DIV_RATIO * 0.00005 - 1; + + writeb(0x0, cec->reg + S5P_CEC_DIVISOR_3); + writeb(0x0, cec->reg + S5P_CEC_DIVISOR_2); + writeb(0x0, cec->reg + S5P_CEC_DIVISOR_1); + writeb(div_val, cec->reg + S5P_CEC_DIVISOR_0); +} + +void s5p_cec_enable_rx(struct s5p_cec_dev *cec) +{ + u8 reg; + + reg = readb(cec->reg + S5P_CEC_RX_CTRL); + reg |= S5P_CEC_RX_CTRL_ENABLE; + writeb(reg, cec->reg + S5P_CEC_RX_CTRL); +} + +void s5p_cec_mask_rx_interrupts(struct s5p_cec_dev *cec) +{ + u8 reg; + + reg = readb(cec->reg + S5P_CEC_IRQ_MASK); + reg |= S5P_CEC_IRQ_RX_DONE; + reg |= S5P_CEC_IRQ_RX_ERROR; + writeb(reg, cec->reg + S5P_CEC_IRQ_MASK); +} + +void s5p_cec_unmask_rx_interrupts(struct s5p_cec_dev *cec) +{ + u8 reg; + + reg = readb(cec->reg + S5P_CEC_IRQ_MASK); + reg &= ~S5P_CEC_IRQ_RX_DONE; + reg &= ~S5P_CEC_IRQ_RX_ERROR; + writeb(reg, cec->reg + S5P_CEC_IRQ_MASK); +} + +void s5p_cec_mask_tx_interrupts(struct s5p_cec_dev *cec) +{ + u8 reg; + + reg = readb(cec->reg + S5P_CEC_IRQ_MASK); + reg |= S5P_CEC_IRQ_TX_DONE; + reg |= S5P_CEC_IRQ_TX_ERROR; + writeb(reg, cec->reg + S5P_CEC_IRQ_MASK); + +} + +void s5p_cec_unmask_tx_interrupts(struct s5p_cec_dev *cec) +{ + u8 reg; + + reg = readb(cec->reg + S5P_CEC_IRQ_MASK); + reg &= ~S5P_CEC_IRQ_TX_DONE; + reg &= ~S5P_CEC_IRQ_TX_ERROR; + writeb(reg, cec->reg + S5P_CEC_IRQ_MASK); +} + +void s5p_cec_reset(struct s5p_cec_dev *cec) +{ + u8 reg; + + writeb(S5P_CEC_RX_CTRL_RESET, cec->reg + S5P_CEC_RX_CTRL); + writeb(S5P_CEC_TX_CTRL_RESET, cec->reg + S5P_CEC_TX_CTRL); + + reg = readb(cec->reg + 0xc4); + reg &= ~0x1; + writeb(reg, cec->reg + 0xc4); +} + +void s5p_cec_tx_reset(struct s5p_cec_dev *cec) +{ + writeb(S5P_CEC_TX_CTRL_RESET, cec->reg + S5P_CEC_TX_CTRL); +} + +void s5p_cec_rx_reset(struct s5p_cec_dev *cec) +{ + u8 reg; + + writeb(S5P_CEC_RX_CTRL_RESET, cec->reg + S5P_CEC_RX_CTRL); + + reg = readb(cec->reg + 0xc4); + reg &= ~0x1; + writeb(reg, cec->reg + 0xc4); +} + +void s5p_cec_threshold(struct s5p_cec_dev *cec) +{ + writeb(CEC_FILTER_THRESHOLD, cec->reg + S5P_CEC_RX_FILTER_TH); + writeb(0, cec->reg + S5P_CEC_RX_FILTER_CTRL); +} + +void s5p_cec_copy_packet(struct s5p_cec_dev *cec, char *data, + size_t count, u8 retries) +{ + int i = 0; + u8 reg; + + while (i < count) { + writeb(data[i], cec->reg + (S5P_CEC_TX_BUFF0 + (i * 4))); + i++; + } + + writeb(count, cec->reg + S5P_CEC_TX_BYTES); + reg = readb(cec->reg + S5P_CEC_TX_CTRL); + reg |= S5P_CEC_TX_CTRL_START; + reg &= ~0x70; + reg |= retries << 4; + + if ((data[0] & CEC_MESSAGE_BROADCAST_MASK) == CEC_MESSAGE_BROADCAST) { + dev_dbg(cec->dev, "Broadcast"); + reg |= S5P_CEC_TX_CTRL_BCAST; + } else { + dev_dbg(cec->dev, "No Broadcast"); + reg &= ~S5P_CEC_TX_CTRL_BCAST; + } + + writeb(reg, cec->reg + S5P_CEC_TX_CTRL); + dev_dbg(cec->dev, "cec-tx: cec count (%zu): %*ph", count, + (int)count, data); +} + +void s5p_cec_set_addr(struct s5p_cec_dev *cec, u32 addr) +{ + writeb(addr & 0x0F, cec->reg + S5P_CEC_LOGIC_ADDR); +} + +u32 s5p_cec_get_status(struct s5p_cec_dev *cec) +{ + u32 status = 0; + + status = readb(cec->reg + S5P_CEC_STATUS_0); + status |= readb(cec->reg + S5P_CEC_STATUS_1) << 8; + status |= readb(cec->reg + S5P_CEC_STATUS_2) << 16; + status |= readb(cec->reg + S5P_CEC_STATUS_3) << 24; + + dev_dbg(cec->dev, "status = 0x%x!\n", status); + + return status; +} + +void s5p_clr_pending_tx(struct s5p_cec_dev *cec) +{ + writeb(S5P_CEC_IRQ_TX_DONE | S5P_CEC_IRQ_TX_ERROR, + cec->reg + S5P_CEC_IRQ_CLEAR); +} + +void s5p_clr_pending_rx(struct s5p_cec_dev *cec) +{ + writeb(S5P_CEC_IRQ_RX_DONE | S5P_CEC_IRQ_RX_ERROR, + cec->reg + S5P_CEC_IRQ_CLEAR); +} + +void s5p_cec_get_rx_buf(struct s5p_cec_dev *cec, u32 size, u8 *buffer) +{ + u32 i = 0; + char debug[40]; + + while (i < size) { + buffer[i] = readb(cec->reg + S5P_CEC_RX_BUFF0 + (i * 4)); + sprintf(debug + i * 2, "%02x ", buffer[i]); + i++; + } + dev_dbg(cec->dev, "cec-rx: cec size(%d): %s", size, debug); +} diff --git a/drivers/staging/media/s5p-cec/regs-cec.h b/drivers/staging/media/s5p-cec/regs-cec.h new file mode 100644 index 000000000000..b2e7e129920e --- /dev/null +++ b/drivers/staging/media/s5p-cec/regs-cec.h @@ -0,0 +1,96 @@ +/* drivers/media/platform/s5p-cec/regs-cec.h + * + * Copyright (c) 2010 Samsung Electronics + * http://www.samsung.com/ + * + * register header file for Samsung TVOUT driver + * + * 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. + */ + +#ifndef __EXYNOS_REGS__H +#define __EXYNOS_REGS__H + +/* + * Register part + */ +#define S5P_CEC_STATUS_0 (0x0000) +#define S5P_CEC_STATUS_1 (0x0004) +#define S5P_CEC_STATUS_2 (0x0008) +#define S5P_CEC_STATUS_3 (0x000C) +#define S5P_CEC_IRQ_MASK (0x0010) +#define S5P_CEC_IRQ_CLEAR (0x0014) +#define S5P_CEC_LOGIC_ADDR (0x0020) +#define S5P_CEC_DIVISOR_0 (0x0030) +#define S5P_CEC_DIVISOR_1 (0x0034) +#define S5P_CEC_DIVISOR_2 (0x0038) +#define S5P_CEC_DIVISOR_3 (0x003C) + +#define S5P_CEC_TX_CTRL (0x0040) +#define S5P_CEC_TX_BYTES (0x0044) +#define S5P_CEC_TX_STAT0 (0x0060) +#define S5P_CEC_TX_STAT1 (0x0064) +#define S5P_CEC_TX_BUFF0 (0x0080) +#define S5P_CEC_TX_BUFF1 (0x0084) +#define S5P_CEC_TX_BUFF2 (0x0088) +#define S5P_CEC_TX_BUFF3 (0x008C) +#define S5P_CEC_TX_BUFF4 (0x0090) +#define S5P_CEC_TX_BUFF5 (0x0094) +#define S5P_CEC_TX_BUFF6 (0x0098) +#define S5P_CEC_TX_BUFF7 (0x009C) +#define S5P_CEC_TX_BUFF8 (0x00A0) +#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 */ diff --git a/drivers/staging/media/s5p-cec/s5p_cec.c b/drivers/staging/media/s5p-cec/s5p_cec.c new file mode 100644 index 000000000000..3844f3915220 --- /dev/null +++ b/drivers/staging/media/s5p-cec/s5p_cec.c @@ -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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 "); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Samsung S5P CEC driver"); diff --git a/drivers/staging/media/s5p-cec/s5p_cec.h b/drivers/staging/media/s5p-cec/s5p_cec.h new file mode 100644 index 000000000000..03732c13d19f --- /dev/null +++ b/drivers/staging/media/s5p-cec/s5p_cec.h @@ -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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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_ */