From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.3 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 279B1C43143 for ; Tue, 2 Oct 2018 17:09:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B6CD22064A for ; Tue, 2 Oct 2018 17:09:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="vgpu02L+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B6CD22064A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728511AbeJBXxZ (ORCPT ); Tue, 2 Oct 2018 19:53:25 -0400 Received: from mail-wm1-f66.google.com ([209.85.128.66]:38547 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726854AbeJBXxZ (ORCPT ); Tue, 2 Oct 2018 19:53:25 -0400 Received: by mail-wm1-f66.google.com with SMTP id 193-v6so2936270wme.3; Tue, 02 Oct 2018 10:08:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=nHrwDkfTlaIJZO5UiEvpw4ozO5Pt0+2LSuj8NKOhTQ4=; b=vgpu02L+FlVGtJdhOZN0v5+zYQGLIFDh2nPDJzO72832IEtAm1RlidryGjpJ3TbmcZ 374a+5mKaJRurXMCyzkJucfR3jQzCudTf8PwSGF7+lElEI3LYejMjjfU8V0FePpmaIEE 3dN5VyfwoIonbF6ejjnFB0l9mRNfpZXmGOKiv/yXF4FMF9yejsMLt5D3rY/kSi2I3R8J wloOWvME41hqF+1W4b4zgG8Ju6mTop5UI8Bn2A7dls1zToSPch60o0TeqmYP/IagVaUL 15GsjX4uTScmKIudB6TRCyXMA0mbLf9qH3zS5lFMupiIrRPxfJt3A+4seBKSgYvRicDh vdzQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=nHrwDkfTlaIJZO5UiEvpw4ozO5Pt0+2LSuj8NKOhTQ4=; b=Fx3pLC6ySfa1HNdrgJgtNen/59yMBMZ9R0ZpWuceEbRRdcegceEhMfte2zJytAuMlI M30+thlXJNSlYnFINBVOVRFrY/AHZunYnisrw5z0kyG3j5TjTD0bonnbnPD1WGUNgiFF ddTmpgXzcpUT8/0RSVHm9XLUjTMC4IL4x2dxyEc9G8P0T9ViGLxQms+MNCyBow8uTGZ8 44ngO/7ymAFr00FL0KPC0YE7JzXxFPfiJ/Fm49LcbP4Ra3R5a5c/KADxLObmkE46SJOM Be9aeFxMSaOoOm7JM2ruy6N1VBpnwAnAios4QhBwR4EYNmM2E39sBI5mBR9oXQGYO2tf aTOg== X-Gm-Message-State: ABuFfojO+ypcfLJYv1qmwl4+woQXNukzRUkcBMLgw7zANPCZcD+CeGVS thnTCU28NarUU9RYt65rz8E= X-Google-Smtp-Source: ACcGV638X7mipuP5JiuC2oWbM4HXJ0zpEupWOOooEeNIPifHx2DQcCOsLO0vt5ZnaGzygxDFvsLsUA== X-Received: by 2002:a1c:d0c8:: with SMTP id h191-v6mr2574935wmg.74.1538500137938; Tue, 02 Oct 2018 10:08:57 -0700 (PDT) Received: from localhost.localdomain (generic-nat1.unisi.it. [193.205.5.2]) by smtp.gmail.com with ESMTPSA id c19-v6sm16799508wre.86.2018.10.02.10.08.56 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 02 Oct 2018 10:08:57 -0700 (PDT) From: ektor5 Cc: hverkuil@xs4all.nl, luca.pisani@udoo.org, jose.abreu@synopsys.com, sean@mess.org, sakari.ailus@linux.intel.com, Ettore Chimenti , Mauro Carvalho Chehab , "David S. Miller" , Greg Kroah-Hartman , Andrew Morton , Arnd Bergmann , Hans Verkuil , Laurent Pinchart , Geert Uytterhoeven , Jacob Chen , Jacopo Mondi , Neil Armstrong , Todor Tomov , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Subject: [PATCH 1/2] media: add SECO cec driver Date: Tue, 2 Oct 2018 18:59:55 +0200 Message-Id: X-Mailer: git-send-email 2.18.0 In-Reply-To: References: To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ettore Chimenti This patch adds support to the CEC device implemented with a STM32 microcontroller in X86 SECO Boards, including UDOO X86. The communication is achieved via Braswell integrated SMBus (i2c-i801). The driver use direct access to the PCI addresses, due to the limitations of the specific driver in presence of ACPI calls. The basic functionalities are tested with success with cec-ctl and cec-compliance. Inspired by cros-ec-cec implementation, attaches to i915 driver cec-notifier. Signed-off-by: Ettore Chimenti --- MAINTAINERS | 6 + drivers/media/platform/Kconfig | 11 + drivers/media/platform/Makefile | 4 + drivers/media/platform/seco-cec/Makefile | 1 + drivers/media/platform/seco-cec/seco-cec.c | 729 +++++++++++++++++++++ drivers/media/platform/seco-cec/seco-cec.h | 132 ++++ 6 files changed, 883 insertions(+) create mode 100644 drivers/media/platform/seco-cec/Makefile create mode 100644 drivers/media/platform/seco-cec/seco-cec.c create mode 100644 drivers/media/platform/seco-cec/seco-cec.h diff --git a/MAINTAINERS b/MAINTAINERS index 4ece30f15777..1062912a5ff4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12972,6 +12972,12 @@ L: sdricohcs-devel@lists.sourceforge.net (subscribers-only) S: Maintained F: drivers/mmc/host/sdricoh_cs.c +SECO BOARDS CEC DRIVER +M: Ettore Chimenti +S: Maintained +F: drivers/media/platform/seco-cec/seco-cec.c +F: drivers/media/platform/seco-cec/seco-cec.h + SECURE COMPUTING M: Kees Cook R: Andy Lutomirski diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig index 94c1fe0e9787..f477764b902a 100644 --- a/drivers/media/platform/Kconfig +++ b/drivers/media/platform/Kconfig @@ -613,6 +613,17 @@ config VIDEO_TEGRA_HDMI_CEC The CEC bus is present in the HDMI connector and enables communication between compatible devices. +config VIDEO_SECO_CEC + tristate "SECO Boards HDMI CEC driver" + depends on (X86 || IA64) || COMPILE_TEST + select CEC_CORE + select CEC_NOTIFIER + help + This is a driver for SECO Boards integrated CEC interface. It uses the + generic CEC framework interface. + CEC bus is present in the HDMI connector and enables communication + between compatible devices. + endif #CEC_PLATFORM_DRIVERS menuconfig SDR_PLATFORM_DRIVERS diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile index 41322ab65802..cc7365c787ba 100644 --- a/drivers/media/platform/Makefile +++ b/drivers/media/platform/Makefile @@ -53,6 +53,10 @@ obj-$(CONFIG_VIDEO_TEGRA_HDMI_CEC) += tegra-cec/ obj-y += stm32/ +obj-$(CONFIG_VIDEO_SECO_CEC) += seco-cec/ + +obj-y += blackfin/ + obj-y += davinci/ obj-$(CONFIG_VIDEO_SH_VOU) += sh_vou.o diff --git a/drivers/media/platform/seco-cec/Makefile b/drivers/media/platform/seco-cec/Makefile new file mode 100644 index 000000000000..a3f2c6bd3ac0 --- /dev/null +++ b/drivers/media/platform/seco-cec/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_VIDEO_SECO_CEC) += seco-cec.o diff --git a/drivers/media/platform/seco-cec/seco-cec.c b/drivers/media/platform/seco-cec/seco-cec.c new file mode 100644 index 000000000000..ba3b7c144a87 --- /dev/null +++ b/drivers/media/platform/seco-cec/seco-cec.c @@ -0,0 +1,729 @@ +// SPDX-License-Identifier: GPL-2.0 AND BSD-3-Clause +/* + * + * CEC driver for SECO X86 Boards + * + * Author: Ettore Chimenti + * Copyright (C) 2018, SECO Srl. + * Copyright (C) 2018, Aidilab Srl. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +/* CEC Framework */ +#include + +#include "seco-cec.h" + +struct secocec_data { + struct device *dev; + struct platform_device *pdev; + struct cec_adapter *cec_adap; + struct cec_notifier *notifier; + int irq; +}; + +#define smb_wr16(cmd, data) smb_word_op(CMD_WORD_DATA, SECOCEC_MICRO_ADDRESS, \ + cmd, data, SMBUS_WRITE, NULL) +#define smb_rd16(cmd, res) smb_word_op(CMD_WORD_DATA, SECOCEC_MICRO_ADDRESS, \ + cmd, 0, SMBUS_READ, res) + +static int smb_word_op(short data_format, u16 slave_addr, u8 cmd, u16 data, + u8 operation, u16 *result) +{ + unsigned int count; + short _data_format; + int ret, status = 0; + + switch (data_format) { + case CMD_BYTE_DATA: + _data_format = BRA_SMB_CMD_BYTE_DATA; + break; + case CMD_WORD_DATA: + _data_format = BRA_SMB_CMD_WORD_DATA; + break; + default: + return -EINVAL; + } + + /* Active wait until ready */ + for (count = 0; count <= SMBTIMEOUT; ++count) { + if (!(inb(HSTS) & BRA_INUSE_STS)) + break; + udelay(SMB_POLL_UDELAY); + } + + if (count > SMBTIMEOUT) { + /* Reset the lock instead of failing */ + outb(0xff, HSTS); + pr_warn("%s: SMBTIMEOUT\n", __func__); + } + + outb(0x00, HCNT); + outb((u8)(slave_addr & 0xfe) | operation, XMIT_SLVA); + outb(cmd, HCMD); + inb(HCNT); + + if (operation == SMBUS_WRITE) { + outb((u8)data, HDAT0); + outb((u8)(data >> 8), HDAT1); + pr_debug("%s: WRITE (0x%02x - count %05d): 0x%04x\n", + __func__, cmd, count, data); + } + + outb(BRA_START + _data_format, HCNT); + + for (count = 0; count <= SMBTIMEOUT; count++) { + if (!(inb(HSTS) & BRA_HOST_BUSY)) + break; + udelay(SMB_POLL_UDELAY); + } + + if (count > SMBTIMEOUT) { + pr_debug("%s: SMBTIMEOUT_1\n", __func__); + status = -EBUSY; + goto err; + } + + ret = inb(HSTS); + if (ret & BRA_HSTS_ERR_MASK) { + pr_debug("%s: HSTS(0x%02X): 0x%X\n", __func__, cmd, ret); + status = -EIO; + goto err; + } + + if (operation == SMBUS_READ) { + *result = ((inb(HDAT0) & 0xff) + ((inb(HDAT1) & 0xff) << 8)); + pr_debug("%s: READ (0x%02x - count %05d): 0x%04x\n", + __func__, cmd, count, *result); + } + +err: + outb(0xff, HSTS); + return status; +} + +static int secocec_adap_enable(struct cec_adapter *adap, bool enable) +{ + struct secocec_data *cec = cec_get_drvdata(adap); + struct device *dev = cec->dev; + u16 val = 0; + int status; + + if (enable) { + /* Clear the status register */ + status = smb_rd16(SECOCEC_STATUS_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_STATUS_REG_1, val); + if (status) + goto err; + + /* Enable the interrupts */ + status = smb_rd16(SECOCEC_ENABLE_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_ENABLE_REG_1, + val | SECOCEC_ENABLE_REG_1_CEC); + if (status) + goto err; + + dev_dbg(dev, "Device enabled"); + + } else { + /* Clear the status register */ + status = smb_rd16(SECOCEC_STATUS_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_STATUS_REG_1, val); + if (status) + goto err; + + /* Disable the interrupts */ + status = smb_rd16(SECOCEC_ENABLE_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_ENABLE_REG_1, val & + ~SECOCEC_ENABLE_REG_1_CEC & + ~SECOCEC_ENABLE_REG_1_IR); + if (status) + goto err; + + dev_dbg(dev, "Device disabled"); + } + + return 0; +err: + dev_err(dev, "Adapter setup failed (%d)", status); + return status; +} + +static int secocec_adap_log_addr(struct cec_adapter *adap, u8 logical_addr) +{ + u16 enable_val = 0; + int status; + + /* Disable device */ + status = smb_rd16(SECOCEC_ENABLE_REG_1, &enable_val); + if (status) + return status; + + status = smb_wr16(SECOCEC_ENABLE_REG_1, + enable_val & ~SECOCEC_ENABLE_REG_1_CEC); + if (status) + return status; + + /* Write logical address */ + status = smb_wr16(SECOCEC_DEVICE_LA, logical_addr); + if (status) + return status; + + /* Re-enable device */ + status = smb_wr16(SECOCEC_ENABLE_REG_1, + enable_val | SECOCEC_ENABLE_REG_1_CEC); + if (status) + return status; + + return 0; +} + +static int secocec_adap_transmit(struct cec_adapter *adap, u8 attempts, + u32 signal_free_time, struct cec_msg *msg) +{ + struct secocec_data *cec = cec_get_drvdata(adap); + struct device *dev = cec->dev; + u16 payload_len, payload_id_len, destination, val = 0; + u8 *payload_msg; + int status; + u8 i; + + /* Device msg len already accounts for header */ + payload_id_len = msg->len - 1; + + /* Send data length */ + status = smb_wr16(SECOCEC_WRITE_DATA_LENGTH, payload_id_len); + if (status) + goto err; + + /* Send Operation ID if present */ + if (payload_id_len > 0) { + status = smb_wr16(SECOCEC_WRITE_OPERATION_ID, msg->msg[1]); + if (status) + goto err; + } + /* Send data if present */ + if (payload_id_len > 1) { + /* Only data; */ + payload_len = msg->len - 2; + payload_msg = &msg->msg[2]; + + /* Copy message into registers */ + for (i = 0; i < payload_len / 2 + payload_len % 2; i++) { + /* hi byte */ + val = payload_msg[(i << 1) + 1] << 8; + + /* lo byte */ + val |= payload_msg[(i << 1)]; + + status = smb_wr16(SECOCEC_WRITE_DATA_00 + i, val); + if (status) + goto err; + } + } + /* Send msg source/destination and fire msg */ + destination = msg->msg[0]; + status = smb_wr16(SECOCEC_WRITE_BYTE0, destination); + if (status) + goto err; + + return 0; + +err: + dev_err(dev, "Transmit failed (%d)", status); + return status; +} + +static int secocec_tx_done(struct cec_adapter *adap, u16 status_val) +{ + int status = 0; + + if (status_val & SECOCEC_STATUS_TX_ERROR_MASK) { + if (status_val & SECOCEC_STATUS_TX_NACK_ERROR) { + cec_transmit_attempt_done(adap, CEC_TX_STATUS_NACK); + status = -EAGAIN; + } else { + cec_transmit_attempt_done(adap, CEC_TX_STATUS_ERROR); + status = -EIO; + } + } else { + cec_transmit_attempt_done(adap, CEC_TX_STATUS_OK); + } + + /* Reset status reg */ + status_val = SECOCEC_STATUS_TX_ERROR_MASK | + SECOCEC_STATUS_MSG_SENT_MASK | + SECOCEC_STATUS_TX_NACK_ERROR; + smb_wr16(SECOCEC_STATUS, status_val); + + return status; +} + +static int secocec_rx_done(struct cec_adapter *adap, u16 status_val) +{ + struct secocec_data *cec = cec_get_drvdata(adap); + struct device *dev = cec->dev; + struct cec_msg msg = { }; + bool flag_overflow = false; + u8 payload_len, i = 0; + u8 *payload_msg; + u16 val = 0; + int status; + + if (status_val & SECOCEC_STATUS_RX_OVERFLOW_MASK) { + dev_warn(dev, "Received more than 16 bytes. Discarding"); + flag_overflow = true; + } + + if (status_val & SECOCEC_STATUS_RX_ERROR_MASK) { + dev_warn(dev, "Message received with errors. Discarding"); + status = -EIO; + goto rxerr; + } + + /* Read message length */ + status = smb_rd16(SECOCEC_READ_DATA_LENGTH, &val); + if (status) + goto err; + + dev_dbg(dev, "Incoming message (payload len %d):", val); + + /* Device msg len already accounts for the header */ + msg.len = min(val + 1, CEC_MAX_MSG_SIZE); + + /* Read logical address */ + status = smb_rd16(SECOCEC_READ_BYTE0, &val); + if (status) + goto err; + + /* device stores source LA and destination */ + msg.msg[0] = val; + + /* Read operation ID if present */ + if (msg.len > 0) { + status = smb_rd16(SECOCEC_READ_OPERATION_ID, &val); + if (status) + goto err; + + msg.msg[1] = val; + } + + /* Read data if present */ + if (msg.len > 1) { + payload_len = msg.len - 2; + payload_msg = &msg.msg[2]; + + /* device stores 2 bytes in every 16-bit val */ + for (i = 0; i < payload_len / 2 + payload_len % 2; i++) { + status = smb_rd16(SECOCEC_READ_DATA_00 + i, &val); + if (status) + goto err; + + /* low byte, skipping header */ + payload_msg[(i << 1)] = val & 0x00ff; + + /* hi byte */ + payload_msg[(i << 1) + 1] = (val & 0xff00) >> 8; + } + } + + cec_received_msg(cec->cec_adap, &msg); + + /* Reset status reg */ + status_val = SECOCEC_STATUS_MSG_RECEIVED_MASK; + if (flag_overflow) + status_val |= SECOCEC_STATUS_RX_OVERFLOW_MASK; + + status = smb_wr16(SECOCEC_STATUS, status_val); + if (status) + goto err; + + dev_dbg(dev, "Message received successfully"); + + return 0; + +rxerr: + /* Reset error reg */ + status_val = SECOCEC_STATUS_MSG_RECEIVED_MASK | + SECOCEC_STATUS_RX_ERROR_MASK; + if (flag_overflow) + status_val |= SECOCEC_STATUS_RX_OVERFLOW_MASK; + smb_wr16(SECOCEC_STATUS, status_val); + +err: + dev_err(dev, "Receive message failed (%d)", status); + return status; +} + +struct cec_adap_ops secocec_cec_adap_ops = { + /* Low-level callbacks */ + .adap_enable = secocec_adap_enable, + .adap_log_addr = secocec_adap_log_addr, + .adap_transmit = secocec_adap_transmit, +}; + +static irqreturn_t secocec_irq_handler(int irq, void *priv) +{ + struct secocec_data *cec = priv; + struct device *dev = cec->dev; + u16 status_val, cec_val, val = 0; + int status; + + /* Read status register */ + status = smb_rd16(SECOCEC_STATUS_REG_1, &status_val); + if (status) + goto err; + + if (status_val & SECOCEC_STATUS_REG_1_CEC) { + dev_dbg(dev, "+++++ CEC Interrupt Caught"); + + /* Read CEC status register */ + status = smb_rd16(SECOCEC_STATUS, &cec_val); + if (status) + goto err; + + if (cec_val & SECOCEC_STATUS_MSG_RECEIVED_MASK) + secocec_rx_done(cec->cec_adap, cec_val); + + if (cec_val & SECOCEC_STATUS_MSG_SENT_MASK) + secocec_tx_done(cec->cec_adap, cec_val); + + if ((~cec_val & SECOCEC_STATUS_MSG_SENT_MASK) && + (~cec_val & SECOCEC_STATUS_MSG_RECEIVED_MASK)) + dev_warn(dev, + "Message not received or sent, but interrupt fired \\_\"._/"); + + val = SECOCEC_STATUS_REG_1_CEC; + } + + if (status_val & SECOCEC_STATUS_REG_1_IR) { + dev_dbg(dev, "IR RC5 Interrupt Caught"); + val |= SECOCEC_STATUS_REG_1_IR; + /* TODO IRDA RX */ + } + + /* Reset status register */ + status = smb_wr16(SECOCEC_STATUS_REG_1, val); + if (status) + goto err; + + dev_dbg(dev, "----- CEC Interrupt Handled"); + + return IRQ_HANDLED; + +err: + dev_err(dev, "IRQ: Read/Write SMBus operation failed (%d)", status); + + /* Reset status register */ + val = SECOCEC_STATUS_REG_1_CEC | SECOCEC_STATUS_REG_1_IR; + smb_wr16(SECOCEC_STATUS_REG_1, val); + + return IRQ_HANDLED; +} + +struct cec_dmi_match { + char *sys_vendor; + char *product_name; + char *devname; + char *conn; +}; + +static const struct cec_dmi_match secocec_dmi_match_table[] = { + /* UDOO X86 */ + { "SECO", "UDOO x86", "0000:00:02.0", "Port B" }, +}; + +static int secocec_cec_get_notifier(struct cec_notifier **notify) +{ + int i; + + for (i = 0 ; i < ARRAY_SIZE(secocec_dmi_match_table) ; ++i) { + const struct cec_dmi_match *m = &secocec_dmi_match_table[i]; + + if (dmi_match(DMI_SYS_VENDOR, m->sys_vendor) && + dmi_match(DMI_PRODUCT_NAME, m->product_name)) { + struct device *d; + + /* Find the device, bail out if not yet registered */ + d = bus_find_device_by_name(&pci_bus_type, NULL, + m->devname); + if (!d) + return -EPROBE_DEFER; + + *notify = cec_notifier_get_conn(d, m->conn); + return 0; + } + } + + return -EINVAL; +} + +static int secocec_acpi_probe(struct secocec_data *sdev) +{ + struct device *dev = sdev->dev; + struct gpio_desc *gpio; + int irq = 0; + + gpio = devm_gpiod_get(dev, NULL, GPIOF_IN); + if (IS_ERR(gpio)) { + dev_err(dev, "Cannot request interrupt gpio"); + return PTR_ERR(gpio); + } + + irq = gpiod_to_irq(gpio); + if (irq < 0) { + dev_err(dev, "Cannot find valid irq"); + return -ENODEV; + } + dev_dbg(dev, "irq-gpio is bound to IRQ %d", irq); + + sdev->irq = irq; + + return 0; +} + +static int secocec_probe(struct platform_device *pdev) +{ + struct secocec_data *secocec; + struct device *dev = &pdev->dev; + u8 cec_caps; + int ret; + u16 val; + + secocec = devm_kzalloc(dev, sizeof(*secocec), GFP_KERNEL); + if (!secocec) + return -ENOMEM; + + dev_set_drvdata(dev, secocec); + + /* Request SMBus regions */ + if (!request_muxed_region(BRA_SMB_BASE_ADDR, 7, "CEC00001")) { + dev_err(dev, "Request memory region failed"); + return -ENXIO; + } + + secocec->pdev = pdev; + secocec->dev = dev; + + if (!has_acpi_companion(dev)) { + dev_dbg(dev, "Cannot find any ACPI companion"); + ret = -ENODEV; + goto err; + } + + ret = secocec_acpi_probe(secocec); + if (ret) { + dev_err(dev, "Cannot assign gpio to IRQ"); + ret = -ENODEV; + goto err; + } + + dev_dbg(dev, "IRQ detected at %d", secocec->irq); + + /* Firmware version check */ + ret = smb_rd16(SECOCEC_VERSION, &val); + if (ret) { + dev_err(dev, "Cannot check fw version"); + goto err; + } + if (val < SECOCEC_LATEST_FW) { + dev_err(dev, "CEC Firmware not supported (v.%04x). Use ver > v.%04x", + val, SECOCEC_LATEST_FW); + ret = -EINVAL; + goto err; + } + +#ifdef CONFIG_CEC_NOTIFIER + ret = secocec_cec_get_notifier(&secocec->notifier); + if (ret) { + dev_err(dev, "no CEC notifier available\n"); + goto err; + } +#endif + + ret = devm_request_threaded_irq(dev, + secocec->irq, + NULL, + secocec_irq_handler, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + dev_name(&pdev->dev), secocec); + + if (ret) { + dev_err(dev, "Cannot request IRQ %d", secocec->irq); + ret = -EIO; + goto err; + } + + /* Allocate CEC adapter */ + cec_caps = CEC_CAP_DEFAULTS; + + secocec->cec_adap = cec_allocate_adapter(&secocec_cec_adap_ops, + secocec, + dev_name(dev), + cec_caps, SECOCEC_MAX_ADDRS); + + if (IS_ERR(secocec->cec_adap)) { + ret = PTR_ERR(secocec->cec_adap); + goto err; + } + + ret = cec_register_adapter(secocec->cec_adap, dev); + if (ret) + goto err_delete_adapter; + + if (secocec->notifier) + cec_register_cec_notifier(secocec->cec_adap, secocec->notifier); + + platform_set_drvdata(pdev, secocec); + + dev_dbg(dev, "Device registered"); + + return ret; + +err_delete_adapter: + cec_delete_adapter(secocec->cec_adap); +err: + dev_err(dev, "%s device probe failed\n", dev_name(dev)); + + return ret; +} + +/* ----------------------------------------------------------------------- */ + +static int secocec_remove(struct platform_device *pdev) +{ + struct secocec_data *secocec = platform_get_drvdata(pdev); + + cec_unregister_adapter(secocec->cec_adap); + + if (secocec->notifier) + cec_notifier_put(secocec->notifier); + + release_region(BRA_SMB_BASE_ADDR, 7); + + dev_dbg(&pdev->dev, "CEC device removed"); + + return 0; +} + +/* ----------------------------------------------------------------------- */ + +#ifdef CONFIG_PM_SLEEP +static int secocec_suspend(struct device *dev) +{ + u16 val; + int status; + + dev_dbg(dev, "Device going to suspend, disabling"); + + /* Clear the status register */ + status = smb_rd16(SECOCEC_STATUS_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_STATUS_REG_1, val); + if (status) + goto err; + + /* Disable the interrupts */ + status = smb_rd16(SECOCEC_ENABLE_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_ENABLE_REG_1, val & + ~SECOCEC_ENABLE_REG_1_CEC & ~SECOCEC_ENABLE_REG_1_IR); + if (status) + goto err; + + return 0; + +err: + dev_err(dev, "Suspend failed (err: %d)", status); + return status; +} + +static int secocec_resume(struct device *dev) +{ + u16 val; + int status; + + dev_dbg(dev, "Resuming device from suspend"); + + /* Clear the status register */ + status = smb_rd16(SECOCEC_STATUS_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_STATUS_REG_1, val); + if (status) + goto err; + + /* Enable the interrupts */ + status = smb_rd16(SECOCEC_ENABLE_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_ENABLE_REG_1, val | SECOCEC_ENABLE_REG_1_CEC); + if (status) + goto err; + + dev_dbg(dev, "Device resumed from suspend"); + + return 0; + +err: + dev_err(dev, "Resume failed (err: %d)", status); + return status; +} + +static SIMPLE_DEV_PM_OPS(secocec_pm_ops, secocec_suspend, secocec_resume); +#define SECOCEC_PM_OPS (&secocec_pm_ops) +#else +#define SECOCEC_PM_OPS NULL +#endif + +#ifdef CONFIG_ACPI +static const struct acpi_device_id secocec_acpi_match[] = { + {"CEC00001", 0}, + {}, +}; + +MODULE_DEVICE_TABLE(acpi, secocec_acpi_match); +#endif + +static struct platform_driver secocec_driver = { + .driver = { + .name = SECOCEC_DEV_NAME, + .acpi_match_table = ACPI_PTR(secocec_acpi_match), + .pm = SECOCEC_PM_OPS, + }, + .probe = secocec_probe, + .remove = secocec_remove, +}; + +module_platform_driver(secocec_driver); + +MODULE_DESCRIPTION("SECO CEC X86 Driver"); +MODULE_AUTHOR("Ettore Chimenti "); +MODULE_LICENSE("Dual BSD/GPL"); diff --git a/drivers/media/platform/seco-cec/seco-cec.h b/drivers/media/platform/seco-cec/seco-cec.h new file mode 100644 index 000000000000..cc7f0cba8e9e --- /dev/null +++ b/drivers/media/platform/seco-cec/seco-cec.h @@ -0,0 +1,132 @@ +/* SPDX-License-Identifier: GPL-2.0 AND BSD-3-Clause */ +/* + * + * SECO X86 Boards CEC register defines + * + * Author: Ettore Chimenti + * Copyright (C) 2018, SECO Srl. + * Copyright (C) 2018, Aidilab Srl. + * + */ + +#ifndef __SECO_CEC_H__ +#define __SECO_CEC_H__ + +#define SECOCEC_MAX_ADDRS 1 +#define SECOCEC_DEV_NAME "secocec" +#define SECOCEC_LATEST_FW 0x0f0b + +#define SMBTIMEOUT 0xffff +#define SMB_POLL_UDELAY 10 + +#define SMBUS_WRITE 0 +#define SMBUS_READ 1 + +#define CMD_BYTE_DATA 0 +#define CMD_WORD_DATA 1 + +/* + * SMBus definitons for Braswell + */ + +#define BRA_DONE_STATUS BIT(7) +#define BRA_INUSE_STS BIT(6) +#define BRA_FAILED_OP BIT(4) +#define BRA_BUS_ERR BIT(3) +#define BRA_DEV_ERR BIT(2) +#define BRA_INTR BIT(1) +#define BRA_HOST_BUSY BIT(0) +#define BRA_HSTS_ERR_MASK (BRA_FAILED_OP | BRA_BUS_ERR | BRA_DEV_ERR) + +#define BRA_PEC_EN BIT(7) +#define BRA_START BIT(6) +#define BRA_LAST__BYTE BIT(5) +#define BRA_INTREN BIT(0) +#define BRA_SMB_CMD (7 << 2) +#define BRA_SMB_CMD_QUICK (0 << 2) +#define BRA_SMB_CMD_BYTE (1 << 2) +#define BRA_SMB_CMD_BYTE_DATA (2 << 2) +#define BRA_SMB_CMD_WORD_DATA (3 << 2) +#define BRA_SMB_CMD_PROCESS_CALL (4 << 2) +#define BRA_SMB_CMD_BLOCK (5 << 2) +#define BRA_SMB_CMD_I2CREAD (6 << 2) +#define BRA_SMB_CMD_BLOCK_PROCESS (7 << 2) + +#define BRA_SMB_BASE_ADDR 0x2040 +#define HSTS (BRA_SMB_BASE_ADDR + 0) +#define HCNT (BRA_SMB_BASE_ADDR + 2) +#define HCMD (BRA_SMB_BASE_ADDR + 3) +#define XMIT_SLVA (BRA_SMB_BASE_ADDR + 4) +#define HDAT0 (BRA_SMB_BASE_ADDR + 5) +#define HDAT1 (BRA_SMB_BASE_ADDR + 6) + +/* + * Microcontroller Address + */ + +#define SECOCEC_MICRO_ADDRESS 0x40 + +/* + * STM32 SMBus Registers + */ + +#define SECOCEC_VERSION 0x00 +#define SECOCEC_ENABLE_REG_1 0x01 +#define SECOCEC_ENABLE_REG_2 0x02 +#define SECOCEC_STATUS_REG_1 0x03 +#define SECOCEC_STATUS_REG_2 0x04 + +#define SECOCEC_STATUS 0x28 +#define SECOCEC_DEVICE_LA 0x29 +#define SECOCEC_READ_OPERATION_ID 0x2a +#define SECOCEC_READ_DATA_LENGTH 0x2b +#define SECOCEC_READ_DATA_00 0x2c +#define SECOCEC_READ_DATA_02 0x2d +#define SECOCEC_READ_DATA_04 0x2e +#define SECOCEC_READ_DATA_06 0x2f +#define SECOCEC_READ_DATA_08 0x30 +#define SECOCEC_READ_DATA_10 0x31 +#define SECOCEC_READ_DATA_12 0x32 +#define SECOCEC_READ_BYTE0 0x33 +#define SECOCEC_WRITE_OPERATION_ID 0x34 +#define SECOCEC_WRITE_DATA_LENGTH 0x35 +#define SECOCEC_WRITE_DATA_00 0x36 +#define SECOCEC_WRITE_DATA_02 0x37 +#define SECOCEC_WRITE_DATA_04 0x38 +#define SECOCEC_WRITE_DATA_06 0x39 +#define SECOCEC_WRITE_DATA_08 0x3a +#define SECOCEC_WRITE_DATA_10 0x3b +#define SECOCEC_WRITE_DATA_12 0x3c +#define SECOCEC_WRITE_BYTE0 0x3d + +#define SECOCEC_IR_READ_DATA 0x3e + +/* + * Enabling register + */ + +#define SECOCEC_ENABLE_REG_1_CEC 0x1000 +#define SECOCEC_ENABLE_REG_1_IR 0x2000 +#define SECOCEC_ENABLE_REG_1_IR_PASSTHROUGH 0x4000 + +/* + * Status register + */ + +#define SECOCEC_STATUS_REG_1_CEC SECOCEC_ENABLE_REG_1_CEC +#define SECOCEC_STATUS_REG_1_IR SECOCEC_ENABLE_REG_1_IR +#define SECOCEC_STATUS_REG_1_IR_PASSTHR SECOCEC_ENABLE_REG_1_IR_PASSTHR + +/* + * Status data + */ + +#define SECOCEC_STATUS_MSG_RECEIVED_MASK BIT(0) +#define SECOCEC_STATUS_RX_ERROR_MASK BIT(1) +#define SECOCEC_STATUS_MSG_SENT_MASK BIT(2) +#define SECOCEC_STATUS_TX_ERROR_MASK BIT(3) + +#define SECOCEC_STATUS_TX_NACK_ERROR BIT(4) +#define SECOCEC_STATUS_RX_OVERFLOW_MASK BIT(5) + +#endif /* __SECO_CEC_H__ */ -- 2.18.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-wm1-f66.google.com ([209.85.128.66]:38547 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726854AbeJBXxZ (ORCPT ); Tue, 2 Oct 2018 19:53:25 -0400 From: ektor5 Cc: hverkuil@xs4all.nl, luca.pisani@udoo.org, jose.abreu@synopsys.com, sean@mess.org, sakari.ailus@linux.intel.com, Ettore Chimenti , Mauro Carvalho Chehab , "David S. Miller" , Greg Kroah-Hartman , Andrew Morton , Arnd Bergmann , Hans Verkuil , Laurent Pinchart , Geert Uytterhoeven , Jacob Chen , Jacopo Mondi , Neil Armstrong , Todor Tomov , linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Subject: [PATCH 1/2] media: add SECO cec driver Date: Tue, 2 Oct 2018 18:59:55 +0200 Message-Id: In-Reply-To: References: To: unlisted-recipients:; (no To-header on input)@bombadil.infradead.org Sender: linux-media-owner@vger.kernel.org List-ID: From: Ettore Chimenti This patch adds support to the CEC device implemented with a STM32 microcontroller in X86 SECO Boards, including UDOO X86. The communication is achieved via Braswell integrated SMBus (i2c-i801). The driver use direct access to the PCI addresses, due to the limitations of the specific driver in presence of ACPI calls. The basic functionalities are tested with success with cec-ctl and cec-compliance. Inspired by cros-ec-cec implementation, attaches to i915 driver cec-notifier. Signed-off-by: Ettore Chimenti --- MAINTAINERS | 6 + drivers/media/platform/Kconfig | 11 + drivers/media/platform/Makefile | 4 + drivers/media/platform/seco-cec/Makefile | 1 + drivers/media/platform/seco-cec/seco-cec.c | 729 +++++++++++++++++++++ drivers/media/platform/seco-cec/seco-cec.h | 132 ++++ 6 files changed, 883 insertions(+) create mode 100644 drivers/media/platform/seco-cec/Makefile create mode 100644 drivers/media/platform/seco-cec/seco-cec.c create mode 100644 drivers/media/platform/seco-cec/seco-cec.h diff --git a/MAINTAINERS b/MAINTAINERS index 4ece30f15777..1062912a5ff4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12972,6 +12972,12 @@ L: sdricohcs-devel@lists.sourceforge.net (subscribers-only) S: Maintained F: drivers/mmc/host/sdricoh_cs.c +SECO BOARDS CEC DRIVER +M: Ettore Chimenti +S: Maintained +F: drivers/media/platform/seco-cec/seco-cec.c +F: drivers/media/platform/seco-cec/seco-cec.h + SECURE COMPUTING M: Kees Cook R: Andy Lutomirski diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig index 94c1fe0e9787..f477764b902a 100644 --- a/drivers/media/platform/Kconfig +++ b/drivers/media/platform/Kconfig @@ -613,6 +613,17 @@ config VIDEO_TEGRA_HDMI_CEC The CEC bus is present in the HDMI connector and enables communication between compatible devices. +config VIDEO_SECO_CEC + tristate "SECO Boards HDMI CEC driver" + depends on (X86 || IA64) || COMPILE_TEST + select CEC_CORE + select CEC_NOTIFIER + help + This is a driver for SECO Boards integrated CEC interface. It uses the + generic CEC framework interface. + CEC bus is present in the HDMI connector and enables communication + between compatible devices. + endif #CEC_PLATFORM_DRIVERS menuconfig SDR_PLATFORM_DRIVERS diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile index 41322ab65802..cc7365c787ba 100644 --- a/drivers/media/platform/Makefile +++ b/drivers/media/platform/Makefile @@ -53,6 +53,10 @@ obj-$(CONFIG_VIDEO_TEGRA_HDMI_CEC) += tegra-cec/ obj-y += stm32/ +obj-$(CONFIG_VIDEO_SECO_CEC) += seco-cec/ + +obj-y += blackfin/ + obj-y += davinci/ obj-$(CONFIG_VIDEO_SH_VOU) += sh_vou.o diff --git a/drivers/media/platform/seco-cec/Makefile b/drivers/media/platform/seco-cec/Makefile new file mode 100644 index 000000000000..a3f2c6bd3ac0 --- /dev/null +++ b/drivers/media/platform/seco-cec/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_VIDEO_SECO_CEC) += seco-cec.o diff --git a/drivers/media/platform/seco-cec/seco-cec.c b/drivers/media/platform/seco-cec/seco-cec.c new file mode 100644 index 000000000000..ba3b7c144a87 --- /dev/null +++ b/drivers/media/platform/seco-cec/seco-cec.c @@ -0,0 +1,729 @@ +// SPDX-License-Identifier: GPL-2.0 AND BSD-3-Clause +/* + * + * CEC driver for SECO X86 Boards + * + * Author: Ettore Chimenti + * Copyright (C) 2018, SECO Srl. + * Copyright (C) 2018, Aidilab Srl. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +/* CEC Framework */ +#include + +#include "seco-cec.h" + +struct secocec_data { + struct device *dev; + struct platform_device *pdev; + struct cec_adapter *cec_adap; + struct cec_notifier *notifier; + int irq; +}; + +#define smb_wr16(cmd, data) smb_word_op(CMD_WORD_DATA, SECOCEC_MICRO_ADDRESS, \ + cmd, data, SMBUS_WRITE, NULL) +#define smb_rd16(cmd, res) smb_word_op(CMD_WORD_DATA, SECOCEC_MICRO_ADDRESS, \ + cmd, 0, SMBUS_READ, res) + +static int smb_word_op(short data_format, u16 slave_addr, u8 cmd, u16 data, + u8 operation, u16 *result) +{ + unsigned int count; + short _data_format; + int ret, status = 0; + + switch (data_format) { + case CMD_BYTE_DATA: + _data_format = BRA_SMB_CMD_BYTE_DATA; + break; + case CMD_WORD_DATA: + _data_format = BRA_SMB_CMD_WORD_DATA; + break; + default: + return -EINVAL; + } + + /* Active wait until ready */ + for (count = 0; count <= SMBTIMEOUT; ++count) { + if (!(inb(HSTS) & BRA_INUSE_STS)) + break; + udelay(SMB_POLL_UDELAY); + } + + if (count > SMBTIMEOUT) { + /* Reset the lock instead of failing */ + outb(0xff, HSTS); + pr_warn("%s: SMBTIMEOUT\n", __func__); + } + + outb(0x00, HCNT); + outb((u8)(slave_addr & 0xfe) | operation, XMIT_SLVA); + outb(cmd, HCMD); + inb(HCNT); + + if (operation == SMBUS_WRITE) { + outb((u8)data, HDAT0); + outb((u8)(data >> 8), HDAT1); + pr_debug("%s: WRITE (0x%02x - count %05d): 0x%04x\n", + __func__, cmd, count, data); + } + + outb(BRA_START + _data_format, HCNT); + + for (count = 0; count <= SMBTIMEOUT; count++) { + if (!(inb(HSTS) & BRA_HOST_BUSY)) + break; + udelay(SMB_POLL_UDELAY); + } + + if (count > SMBTIMEOUT) { + pr_debug("%s: SMBTIMEOUT_1\n", __func__); + status = -EBUSY; + goto err; + } + + ret = inb(HSTS); + if (ret & BRA_HSTS_ERR_MASK) { + pr_debug("%s: HSTS(0x%02X): 0x%X\n", __func__, cmd, ret); + status = -EIO; + goto err; + } + + if (operation == SMBUS_READ) { + *result = ((inb(HDAT0) & 0xff) + ((inb(HDAT1) & 0xff) << 8)); + pr_debug("%s: READ (0x%02x - count %05d): 0x%04x\n", + __func__, cmd, count, *result); + } + +err: + outb(0xff, HSTS); + return status; +} + +static int secocec_adap_enable(struct cec_adapter *adap, bool enable) +{ + struct secocec_data *cec = cec_get_drvdata(adap); + struct device *dev = cec->dev; + u16 val = 0; + int status; + + if (enable) { + /* Clear the status register */ + status = smb_rd16(SECOCEC_STATUS_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_STATUS_REG_1, val); + if (status) + goto err; + + /* Enable the interrupts */ + status = smb_rd16(SECOCEC_ENABLE_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_ENABLE_REG_1, + val | SECOCEC_ENABLE_REG_1_CEC); + if (status) + goto err; + + dev_dbg(dev, "Device enabled"); + + } else { + /* Clear the status register */ + status = smb_rd16(SECOCEC_STATUS_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_STATUS_REG_1, val); + if (status) + goto err; + + /* Disable the interrupts */ + status = smb_rd16(SECOCEC_ENABLE_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_ENABLE_REG_1, val & + ~SECOCEC_ENABLE_REG_1_CEC & + ~SECOCEC_ENABLE_REG_1_IR); + if (status) + goto err; + + dev_dbg(dev, "Device disabled"); + } + + return 0; +err: + dev_err(dev, "Adapter setup failed (%d)", status); + return status; +} + +static int secocec_adap_log_addr(struct cec_adapter *adap, u8 logical_addr) +{ + u16 enable_val = 0; + int status; + + /* Disable device */ + status = smb_rd16(SECOCEC_ENABLE_REG_1, &enable_val); + if (status) + return status; + + status = smb_wr16(SECOCEC_ENABLE_REG_1, + enable_val & ~SECOCEC_ENABLE_REG_1_CEC); + if (status) + return status; + + /* Write logical address */ + status = smb_wr16(SECOCEC_DEVICE_LA, logical_addr); + if (status) + return status; + + /* Re-enable device */ + status = smb_wr16(SECOCEC_ENABLE_REG_1, + enable_val | SECOCEC_ENABLE_REG_1_CEC); + if (status) + return status; + + return 0; +} + +static int secocec_adap_transmit(struct cec_adapter *adap, u8 attempts, + u32 signal_free_time, struct cec_msg *msg) +{ + struct secocec_data *cec = cec_get_drvdata(adap); + struct device *dev = cec->dev; + u16 payload_len, payload_id_len, destination, val = 0; + u8 *payload_msg; + int status; + u8 i; + + /* Device msg len already accounts for header */ + payload_id_len = msg->len - 1; + + /* Send data length */ + status = smb_wr16(SECOCEC_WRITE_DATA_LENGTH, payload_id_len); + if (status) + goto err; + + /* Send Operation ID if present */ + if (payload_id_len > 0) { + status = smb_wr16(SECOCEC_WRITE_OPERATION_ID, msg->msg[1]); + if (status) + goto err; + } + /* Send data if present */ + if (payload_id_len > 1) { + /* Only data; */ + payload_len = msg->len - 2; + payload_msg = &msg->msg[2]; + + /* Copy message into registers */ + for (i = 0; i < payload_len / 2 + payload_len % 2; i++) { + /* hi byte */ + val = payload_msg[(i << 1) + 1] << 8; + + /* lo byte */ + val |= payload_msg[(i << 1)]; + + status = smb_wr16(SECOCEC_WRITE_DATA_00 + i, val); + if (status) + goto err; + } + } + /* Send msg source/destination and fire msg */ + destination = msg->msg[0]; + status = smb_wr16(SECOCEC_WRITE_BYTE0, destination); + if (status) + goto err; + + return 0; + +err: + dev_err(dev, "Transmit failed (%d)", status); + return status; +} + +static int secocec_tx_done(struct cec_adapter *adap, u16 status_val) +{ + int status = 0; + + if (status_val & SECOCEC_STATUS_TX_ERROR_MASK) { + if (status_val & SECOCEC_STATUS_TX_NACK_ERROR) { + cec_transmit_attempt_done(adap, CEC_TX_STATUS_NACK); + status = -EAGAIN; + } else { + cec_transmit_attempt_done(adap, CEC_TX_STATUS_ERROR); + status = -EIO; + } + } else { + cec_transmit_attempt_done(adap, CEC_TX_STATUS_OK); + } + + /* Reset status reg */ + status_val = SECOCEC_STATUS_TX_ERROR_MASK | + SECOCEC_STATUS_MSG_SENT_MASK | + SECOCEC_STATUS_TX_NACK_ERROR; + smb_wr16(SECOCEC_STATUS, status_val); + + return status; +} + +static int secocec_rx_done(struct cec_adapter *adap, u16 status_val) +{ + struct secocec_data *cec = cec_get_drvdata(adap); + struct device *dev = cec->dev; + struct cec_msg msg = { }; + bool flag_overflow = false; + u8 payload_len, i = 0; + u8 *payload_msg; + u16 val = 0; + int status; + + if (status_val & SECOCEC_STATUS_RX_OVERFLOW_MASK) { + dev_warn(dev, "Received more than 16 bytes. Discarding"); + flag_overflow = true; + } + + if (status_val & SECOCEC_STATUS_RX_ERROR_MASK) { + dev_warn(dev, "Message received with errors. Discarding"); + status = -EIO; + goto rxerr; + } + + /* Read message length */ + status = smb_rd16(SECOCEC_READ_DATA_LENGTH, &val); + if (status) + goto err; + + dev_dbg(dev, "Incoming message (payload len %d):", val); + + /* Device msg len already accounts for the header */ + msg.len = min(val + 1, CEC_MAX_MSG_SIZE); + + /* Read logical address */ + status = smb_rd16(SECOCEC_READ_BYTE0, &val); + if (status) + goto err; + + /* device stores source LA and destination */ + msg.msg[0] = val; + + /* Read operation ID if present */ + if (msg.len > 0) { + status = smb_rd16(SECOCEC_READ_OPERATION_ID, &val); + if (status) + goto err; + + msg.msg[1] = val; + } + + /* Read data if present */ + if (msg.len > 1) { + payload_len = msg.len - 2; + payload_msg = &msg.msg[2]; + + /* device stores 2 bytes in every 16-bit val */ + for (i = 0; i < payload_len / 2 + payload_len % 2; i++) { + status = smb_rd16(SECOCEC_READ_DATA_00 + i, &val); + if (status) + goto err; + + /* low byte, skipping header */ + payload_msg[(i << 1)] = val & 0x00ff; + + /* hi byte */ + payload_msg[(i << 1) + 1] = (val & 0xff00) >> 8; + } + } + + cec_received_msg(cec->cec_adap, &msg); + + /* Reset status reg */ + status_val = SECOCEC_STATUS_MSG_RECEIVED_MASK; + if (flag_overflow) + status_val |= SECOCEC_STATUS_RX_OVERFLOW_MASK; + + status = smb_wr16(SECOCEC_STATUS, status_val); + if (status) + goto err; + + dev_dbg(dev, "Message received successfully"); + + return 0; + +rxerr: + /* Reset error reg */ + status_val = SECOCEC_STATUS_MSG_RECEIVED_MASK | + SECOCEC_STATUS_RX_ERROR_MASK; + if (flag_overflow) + status_val |= SECOCEC_STATUS_RX_OVERFLOW_MASK; + smb_wr16(SECOCEC_STATUS, status_val); + +err: + dev_err(dev, "Receive message failed (%d)", status); + return status; +} + +struct cec_adap_ops secocec_cec_adap_ops = { + /* Low-level callbacks */ + .adap_enable = secocec_adap_enable, + .adap_log_addr = secocec_adap_log_addr, + .adap_transmit = secocec_adap_transmit, +}; + +static irqreturn_t secocec_irq_handler(int irq, void *priv) +{ + struct secocec_data *cec = priv; + struct device *dev = cec->dev; + u16 status_val, cec_val, val = 0; + int status; + + /* Read status register */ + status = smb_rd16(SECOCEC_STATUS_REG_1, &status_val); + if (status) + goto err; + + if (status_val & SECOCEC_STATUS_REG_1_CEC) { + dev_dbg(dev, "+++++ CEC Interrupt Caught"); + + /* Read CEC status register */ + status = smb_rd16(SECOCEC_STATUS, &cec_val); + if (status) + goto err; + + if (cec_val & SECOCEC_STATUS_MSG_RECEIVED_MASK) + secocec_rx_done(cec->cec_adap, cec_val); + + if (cec_val & SECOCEC_STATUS_MSG_SENT_MASK) + secocec_tx_done(cec->cec_adap, cec_val); + + if ((~cec_val & SECOCEC_STATUS_MSG_SENT_MASK) && + (~cec_val & SECOCEC_STATUS_MSG_RECEIVED_MASK)) + dev_warn(dev, + "Message not received or sent, but interrupt fired \\_\"._/"); + + val = SECOCEC_STATUS_REG_1_CEC; + } + + if (status_val & SECOCEC_STATUS_REG_1_IR) { + dev_dbg(dev, "IR RC5 Interrupt Caught"); + val |= SECOCEC_STATUS_REG_1_IR; + /* TODO IRDA RX */ + } + + /* Reset status register */ + status = smb_wr16(SECOCEC_STATUS_REG_1, val); + if (status) + goto err; + + dev_dbg(dev, "----- CEC Interrupt Handled"); + + return IRQ_HANDLED; + +err: + dev_err(dev, "IRQ: Read/Write SMBus operation failed (%d)", status); + + /* Reset status register */ + val = SECOCEC_STATUS_REG_1_CEC | SECOCEC_STATUS_REG_1_IR; + smb_wr16(SECOCEC_STATUS_REG_1, val); + + return IRQ_HANDLED; +} + +struct cec_dmi_match { + char *sys_vendor; + char *product_name; + char *devname; + char *conn; +}; + +static const struct cec_dmi_match secocec_dmi_match_table[] = { + /* UDOO X86 */ + { "SECO", "UDOO x86", "0000:00:02.0", "Port B" }, +}; + +static int secocec_cec_get_notifier(struct cec_notifier **notify) +{ + int i; + + for (i = 0 ; i < ARRAY_SIZE(secocec_dmi_match_table) ; ++i) { + const struct cec_dmi_match *m = &secocec_dmi_match_table[i]; + + if (dmi_match(DMI_SYS_VENDOR, m->sys_vendor) && + dmi_match(DMI_PRODUCT_NAME, m->product_name)) { + struct device *d; + + /* Find the device, bail out if not yet registered */ + d = bus_find_device_by_name(&pci_bus_type, NULL, + m->devname); + if (!d) + return -EPROBE_DEFER; + + *notify = cec_notifier_get_conn(d, m->conn); + return 0; + } + } + + return -EINVAL; +} + +static int secocec_acpi_probe(struct secocec_data *sdev) +{ + struct device *dev = sdev->dev; + struct gpio_desc *gpio; + int irq = 0; + + gpio = devm_gpiod_get(dev, NULL, GPIOF_IN); + if (IS_ERR(gpio)) { + dev_err(dev, "Cannot request interrupt gpio"); + return PTR_ERR(gpio); + } + + irq = gpiod_to_irq(gpio); + if (irq < 0) { + dev_err(dev, "Cannot find valid irq"); + return -ENODEV; + } + dev_dbg(dev, "irq-gpio is bound to IRQ %d", irq); + + sdev->irq = irq; + + return 0; +} + +static int secocec_probe(struct platform_device *pdev) +{ + struct secocec_data *secocec; + struct device *dev = &pdev->dev; + u8 cec_caps; + int ret; + u16 val; + + secocec = devm_kzalloc(dev, sizeof(*secocec), GFP_KERNEL); + if (!secocec) + return -ENOMEM; + + dev_set_drvdata(dev, secocec); + + /* Request SMBus regions */ + if (!request_muxed_region(BRA_SMB_BASE_ADDR, 7, "CEC00001")) { + dev_err(dev, "Request memory region failed"); + return -ENXIO; + } + + secocec->pdev = pdev; + secocec->dev = dev; + + if (!has_acpi_companion(dev)) { + dev_dbg(dev, "Cannot find any ACPI companion"); + ret = -ENODEV; + goto err; + } + + ret = secocec_acpi_probe(secocec); + if (ret) { + dev_err(dev, "Cannot assign gpio to IRQ"); + ret = -ENODEV; + goto err; + } + + dev_dbg(dev, "IRQ detected at %d", secocec->irq); + + /* Firmware version check */ + ret = smb_rd16(SECOCEC_VERSION, &val); + if (ret) { + dev_err(dev, "Cannot check fw version"); + goto err; + } + if (val < SECOCEC_LATEST_FW) { + dev_err(dev, "CEC Firmware not supported (v.%04x). Use ver > v.%04x", + val, SECOCEC_LATEST_FW); + ret = -EINVAL; + goto err; + } + +#ifdef CONFIG_CEC_NOTIFIER + ret = secocec_cec_get_notifier(&secocec->notifier); + if (ret) { + dev_err(dev, "no CEC notifier available\n"); + goto err; + } +#endif + + ret = devm_request_threaded_irq(dev, + secocec->irq, + NULL, + secocec_irq_handler, + IRQF_TRIGGER_RISING | IRQF_ONESHOT, + dev_name(&pdev->dev), secocec); + + if (ret) { + dev_err(dev, "Cannot request IRQ %d", secocec->irq); + ret = -EIO; + goto err; + } + + /* Allocate CEC adapter */ + cec_caps = CEC_CAP_DEFAULTS; + + secocec->cec_adap = cec_allocate_adapter(&secocec_cec_adap_ops, + secocec, + dev_name(dev), + cec_caps, SECOCEC_MAX_ADDRS); + + if (IS_ERR(secocec->cec_adap)) { + ret = PTR_ERR(secocec->cec_adap); + goto err; + } + + ret = cec_register_adapter(secocec->cec_adap, dev); + if (ret) + goto err_delete_adapter; + + if (secocec->notifier) + cec_register_cec_notifier(secocec->cec_adap, secocec->notifier); + + platform_set_drvdata(pdev, secocec); + + dev_dbg(dev, "Device registered"); + + return ret; + +err_delete_adapter: + cec_delete_adapter(secocec->cec_adap); +err: + dev_err(dev, "%s device probe failed\n", dev_name(dev)); + + return ret; +} + +/* ----------------------------------------------------------------------- */ + +static int secocec_remove(struct platform_device *pdev) +{ + struct secocec_data *secocec = platform_get_drvdata(pdev); + + cec_unregister_adapter(secocec->cec_adap); + + if (secocec->notifier) + cec_notifier_put(secocec->notifier); + + release_region(BRA_SMB_BASE_ADDR, 7); + + dev_dbg(&pdev->dev, "CEC device removed"); + + return 0; +} + +/* ----------------------------------------------------------------------- */ + +#ifdef CONFIG_PM_SLEEP +static int secocec_suspend(struct device *dev) +{ + u16 val; + int status; + + dev_dbg(dev, "Device going to suspend, disabling"); + + /* Clear the status register */ + status = smb_rd16(SECOCEC_STATUS_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_STATUS_REG_1, val); + if (status) + goto err; + + /* Disable the interrupts */ + status = smb_rd16(SECOCEC_ENABLE_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_ENABLE_REG_1, val & + ~SECOCEC_ENABLE_REG_1_CEC & ~SECOCEC_ENABLE_REG_1_IR); + if (status) + goto err; + + return 0; + +err: + dev_err(dev, "Suspend failed (err: %d)", status); + return status; +} + +static int secocec_resume(struct device *dev) +{ + u16 val; + int status; + + dev_dbg(dev, "Resuming device from suspend"); + + /* Clear the status register */ + status = smb_rd16(SECOCEC_STATUS_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_STATUS_REG_1, val); + if (status) + goto err; + + /* Enable the interrupts */ + status = smb_rd16(SECOCEC_ENABLE_REG_1, &val); + if (status) + goto err; + + status = smb_wr16(SECOCEC_ENABLE_REG_1, val | SECOCEC_ENABLE_REG_1_CEC); + if (status) + goto err; + + dev_dbg(dev, "Device resumed from suspend"); + + return 0; + +err: + dev_err(dev, "Resume failed (err: %d)", status); + return status; +} + +static SIMPLE_DEV_PM_OPS(secocec_pm_ops, secocec_suspend, secocec_resume); +#define SECOCEC_PM_OPS (&secocec_pm_ops) +#else +#define SECOCEC_PM_OPS NULL +#endif + +#ifdef CONFIG_ACPI +static const struct acpi_device_id secocec_acpi_match[] = { + {"CEC00001", 0}, + {}, +}; + +MODULE_DEVICE_TABLE(acpi, secocec_acpi_match); +#endif + +static struct platform_driver secocec_driver = { + .driver = { + .name = SECOCEC_DEV_NAME, + .acpi_match_table = ACPI_PTR(secocec_acpi_match), + .pm = SECOCEC_PM_OPS, + }, + .probe = secocec_probe, + .remove = secocec_remove, +}; + +module_platform_driver(secocec_driver); + +MODULE_DESCRIPTION("SECO CEC X86 Driver"); +MODULE_AUTHOR("Ettore Chimenti "); +MODULE_LICENSE("Dual BSD/GPL"); diff --git a/drivers/media/platform/seco-cec/seco-cec.h b/drivers/media/platform/seco-cec/seco-cec.h new file mode 100644 index 000000000000..cc7f0cba8e9e --- /dev/null +++ b/drivers/media/platform/seco-cec/seco-cec.h @@ -0,0 +1,132 @@ +/* SPDX-License-Identifier: GPL-2.0 AND BSD-3-Clause */ +/* + * + * SECO X86 Boards CEC register defines + * + * Author: Ettore Chimenti + * Copyright (C) 2018, SECO Srl. + * Copyright (C) 2018, Aidilab Srl. + * + */ + +#ifndef __SECO_CEC_H__ +#define __SECO_CEC_H__ + +#define SECOCEC_MAX_ADDRS 1 +#define SECOCEC_DEV_NAME "secocec" +#define SECOCEC_LATEST_FW 0x0f0b + +#define SMBTIMEOUT 0xffff +#define SMB_POLL_UDELAY 10 + +#define SMBUS_WRITE 0 +#define SMBUS_READ 1 + +#define CMD_BYTE_DATA 0 +#define CMD_WORD_DATA 1 + +/* + * SMBus definitons for Braswell + */ + +#define BRA_DONE_STATUS BIT(7) +#define BRA_INUSE_STS BIT(6) +#define BRA_FAILED_OP BIT(4) +#define BRA_BUS_ERR BIT(3) +#define BRA_DEV_ERR BIT(2) +#define BRA_INTR BIT(1) +#define BRA_HOST_BUSY BIT(0) +#define BRA_HSTS_ERR_MASK (BRA_FAILED_OP | BRA_BUS_ERR | BRA_DEV_ERR) + +#define BRA_PEC_EN BIT(7) +#define BRA_START BIT(6) +#define BRA_LAST__BYTE BIT(5) +#define BRA_INTREN BIT(0) +#define BRA_SMB_CMD (7 << 2) +#define BRA_SMB_CMD_QUICK (0 << 2) +#define BRA_SMB_CMD_BYTE (1 << 2) +#define BRA_SMB_CMD_BYTE_DATA (2 << 2) +#define BRA_SMB_CMD_WORD_DATA (3 << 2) +#define BRA_SMB_CMD_PROCESS_CALL (4 << 2) +#define BRA_SMB_CMD_BLOCK (5 << 2) +#define BRA_SMB_CMD_I2CREAD (6 << 2) +#define BRA_SMB_CMD_BLOCK_PROCESS (7 << 2) + +#define BRA_SMB_BASE_ADDR 0x2040 +#define HSTS (BRA_SMB_BASE_ADDR + 0) +#define HCNT (BRA_SMB_BASE_ADDR + 2) +#define HCMD (BRA_SMB_BASE_ADDR + 3) +#define XMIT_SLVA (BRA_SMB_BASE_ADDR + 4) +#define HDAT0 (BRA_SMB_BASE_ADDR + 5) +#define HDAT1 (BRA_SMB_BASE_ADDR + 6) + +/* + * Microcontroller Address + */ + +#define SECOCEC_MICRO_ADDRESS 0x40 + +/* + * STM32 SMBus Registers + */ + +#define SECOCEC_VERSION 0x00 +#define SECOCEC_ENABLE_REG_1 0x01 +#define SECOCEC_ENABLE_REG_2 0x02 +#define SECOCEC_STATUS_REG_1 0x03 +#define SECOCEC_STATUS_REG_2 0x04 + +#define SECOCEC_STATUS 0x28 +#define SECOCEC_DEVICE_LA 0x29 +#define SECOCEC_READ_OPERATION_ID 0x2a +#define SECOCEC_READ_DATA_LENGTH 0x2b +#define SECOCEC_READ_DATA_00 0x2c +#define SECOCEC_READ_DATA_02 0x2d +#define SECOCEC_READ_DATA_04 0x2e +#define SECOCEC_READ_DATA_06 0x2f +#define SECOCEC_READ_DATA_08 0x30 +#define SECOCEC_READ_DATA_10 0x31 +#define SECOCEC_READ_DATA_12 0x32 +#define SECOCEC_READ_BYTE0 0x33 +#define SECOCEC_WRITE_OPERATION_ID 0x34 +#define SECOCEC_WRITE_DATA_LENGTH 0x35 +#define SECOCEC_WRITE_DATA_00 0x36 +#define SECOCEC_WRITE_DATA_02 0x37 +#define SECOCEC_WRITE_DATA_04 0x38 +#define SECOCEC_WRITE_DATA_06 0x39 +#define SECOCEC_WRITE_DATA_08 0x3a +#define SECOCEC_WRITE_DATA_10 0x3b +#define SECOCEC_WRITE_DATA_12 0x3c +#define SECOCEC_WRITE_BYTE0 0x3d + +#define SECOCEC_IR_READ_DATA 0x3e + +/* + * Enabling register + */ + +#define SECOCEC_ENABLE_REG_1_CEC 0x1000 +#define SECOCEC_ENABLE_REG_1_IR 0x2000 +#define SECOCEC_ENABLE_REG_1_IR_PASSTHROUGH 0x4000 + +/* + * Status register + */ + +#define SECOCEC_STATUS_REG_1_CEC SECOCEC_ENABLE_REG_1_CEC +#define SECOCEC_STATUS_REG_1_IR SECOCEC_ENABLE_REG_1_IR +#define SECOCEC_STATUS_REG_1_IR_PASSTHR SECOCEC_ENABLE_REG_1_IR_PASSTHR + +/* + * Status data + */ + +#define SECOCEC_STATUS_MSG_RECEIVED_MASK BIT(0) +#define SECOCEC_STATUS_RX_ERROR_MASK BIT(1) +#define SECOCEC_STATUS_MSG_SENT_MASK BIT(2) +#define SECOCEC_STATUS_TX_ERROR_MASK BIT(3) + +#define SECOCEC_STATUS_TX_NACK_ERROR BIT(4) +#define SECOCEC_STATUS_RX_OVERFLOW_MASK BIT(5) + +#endif /* __SECO_CEC_H__ */ -- 2.18.0