From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: [V9,4/4] USB: serial: f81232: implement break control From: "Ji-Ze Hong \(Peter Hong\)" Message-Id: <1556587352-19500-4-git-send-email-hpeter+linux_kernel@gmail.com> Date: Tue, 30 Apr 2019 09:22:32 +0800 To: peter_hong@fintek.com.tw, johan@kernel.org, gregkh@linuxfoundation.org Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, "Ji-Ze Hong \(Peter Hong\)" List-ID: SW1wbGVtZW50IEZpbnRlayBGODEyMzIgYnJlYWsgb24vb2ZmIHdpdGggTENSIHJlZ2lzdGVyLgpJ dCdzIHRoZSBzYW1lIHdpdGggMTY1NTBBIExDUiByZWdpc3RlciBsYXlvdXQuCgpTaWduZWQtb2Zm LWJ5OiBKaS1aZSBIb25nIChQZXRlciBIb25nKSA8aHBldGVyK2xpbnV4X2tlcm5lbEBnbWFpbC5j b20+Ci0tLQp2OToKCTE6IG5vIGNoYW5nZQoKdjg6CgkxOiBubyBjaGFuZ2UKCnY3OgoJMTogbm8g Y2hhbmdlCgp2NjoKCTE6IG5vIGNoYW5nZQoKdjU6CgkxOiBubyBjaGFuZ2UKCnY0OgoJMTogbm8g Y2hhbmdlCgp2MzoKCTE6IHVzaW5nIHNoYWRvd19sY3IgdG8gc2F2ZSBMQ1IgaW4gZjgxMjMyX2Jy ZWFrX2N0bCgpCgogZHJpdmVycy91c2Ivc2VyaWFsL2Y4MTIzMi5jIHwgMjkgKysrKysrKysrKysr KysrKysrKysrKystLS0tLS0KIDEgZmlsZSBjaGFuZ2VkLCAyMyBpbnNlcnRpb25zKCspLCA2IGRl bGV0aW9ucygtKQoKZGlmZiAtLWdpdCBhL2RyaXZlcnMvdXNiL3NlcmlhbC9mODEyMzIuYyBiL2Ry aXZlcnMvdXNiL3NlcmlhbC9mODEyMzIuYwppbmRleCA2YTFlNmEyN2NlMTYuLjU2MmM5YmFiZDE0 NCAxMDA2NDQKLS0tIGEvZHJpdmVycy91c2Ivc2VyaWFsL2Y4MTIzMi5jCisrKyBiL2RyaXZlcnMv dXNiL3NlcmlhbC9mODEyMzIuYwpAQCAtNjUsNiArNjUsNyBAQCBzdHJ1Y3QgZjgxMjMyX3ByaXZh dGUgewogCXN0cnVjdCBtdXRleCBsb2NrOwogCXU4IG1vZGVtX2NvbnRyb2w7CiAJdTggbW9kZW1f c3RhdHVzOworCXU4IHNoYWRvd19sY3I7CiAJc3BlZWRfdCBiYXVkX2Jhc2U7CiAJc3RydWN0IHdv cmtfc3RydWN0IGxzcl93b3JrOwogCXN0cnVjdCB3b3JrX3N0cnVjdCBpbnRlcnJ1cHRfd29yazsK QEAgLTM3NywxMyArMzc4LDIzIEBAIHN0YXRpYyB2b2lkIGY4MTIzMl9wcm9jZXNzX3JlYWRfdXJi KHN0cnVjdCB1cmIgKnVyYikKIAogc3RhdGljIHZvaWQgZjgxMjMyX2JyZWFrX2N0bChzdHJ1Y3Qg dHR5X3N0cnVjdCAqdHR5LCBpbnQgYnJlYWtfc3RhdGUpCiB7Ci0JLyogRklYTUUgLSBTdHViYmVk IG91dCBmb3Igbm93ICovCisJc3RydWN0IHVzYl9zZXJpYWxfcG9ydCAqcG9ydCA9IHR0eS0+ZHJp dmVyX2RhdGE7CisJc3RydWN0IGY4MTIzMl9wcml2YXRlICpwcml2ID0gdXNiX2dldF9zZXJpYWxf cG9ydF9kYXRhKHBvcnQpOworCWludCBzdGF0dXM7CiAKLQkvKgotCSAqIGJyZWFrX3N0YXRlID0g LTEgdG8gdHVybiBvbiBicmVhaywgYW5kIDAgdG8gdHVybiBvZmYgYnJlYWsKLQkgKiBzZWUgZHJp dmVycy9jaGFyL3R0eV9pby5jIHRvIHNlZSBpdCB1c2VkLgotCSAqIGxhc3Rfc2V0X2RhdGFfdXJi X3ZhbHVlIE5FVkVSIGhhcyB0aGUgYnJlYWsgYml0IHNldCBpbiBpdC4KLQkgKi8KKwltdXRleF9s b2NrKCZwcml2LT5sb2NrKTsKKworCWlmIChicmVha19zdGF0ZSkKKwkJcHJpdi0+c2hhZG93X2xj ciB8PSBVQVJUX0xDUl9TQkM7CisJZWxzZQorCQlwcml2LT5zaGFkb3dfbGNyICY9IH5VQVJUX0xD Ul9TQkM7CisKKwlzdGF0dXMgPSBmODEyMzJfc2V0X3JlZ2lzdGVyKHBvcnQsIExJTkVfQ09OVFJP TF9SRUdJU1RFUiwKKwkJCQkJcHJpdi0+c2hhZG93X2xjcik7CisJaWYgKHN0YXR1cykKKwkJZGV2 X2VycigmcG9ydC0+ZGV2LCAic2V0IGJyZWFrIGZhaWxlZDogJWRcbiIsIHN0YXR1cyk7CisKKwlt dXRleF91bmxvY2soJnByaXYtPmxvY2spOwogfQogCiBzdGF0aWMgaW50IGY4MTIzMl9maW5kX2Ns ayhzcGVlZF90IGJhdWRyYXRlKQpAQCAtNTE5LDYgKzUzMCw3IEBAIHN0YXRpYyBpbnQgZjgxMjMy X3BvcnRfZGlzYWJsZShzdHJ1Y3QgdXNiX3NlcmlhbF9wb3J0ICpwb3J0KQogc3RhdGljIHZvaWQg ZjgxMjMyX3NldF90ZXJtaW9zKHN0cnVjdCB0dHlfc3RydWN0ICp0dHksCiAJCXN0cnVjdCB1c2Jf c2VyaWFsX3BvcnQgKnBvcnQsIHN0cnVjdCBrdGVybWlvcyAqb2xkX3Rlcm1pb3MpCiB7CisJc3Ry dWN0IGY4MTIzMl9wcml2YXRlICpwcml2ID0gdXNiX2dldF9zZXJpYWxfcG9ydF9kYXRhKHBvcnQp OwogCXU4IG5ld19sY3IgPSAwOwogCWludCBzdGF0dXMgPSAwOwogCXNwZWVkX3QgYmF1ZHJhdGU7 CkBAIC01NzIsMTEgKzU4NCwxNiBAQCBzdGF0aWMgdm9pZCBmODEyMzJfc2V0X3Rlcm1pb3Moc3Ry dWN0IHR0eV9zdHJ1Y3QgKnR0eSwKIAkJYnJlYWs7CiAJfQogCisJbXV0ZXhfbG9jaygmcHJpdi0+ bG9jayk7CisKKwluZXdfbGNyIHw9IChwcml2LT5zaGFkb3dfbGNyICYgVUFSVF9MQ1JfU0JDKTsK IAlzdGF0dXMgPSBmODEyMzJfc2V0X3JlZ2lzdGVyKHBvcnQsIExJTkVfQ09OVFJPTF9SRUdJU1RF UiwgbmV3X2xjcik7CiAJaWYgKHN0YXR1cykgewogCQlkZXZfZXJyKCZwb3J0LT5kZXYsICIlcyBm YWlsZWQgdG8gc2V0IExDUjogJWRcbiIsCiAJCQlfX2Z1bmNfXywgc3RhdHVzKTsKIAl9CisKKwlt dXRleF91bmxvY2soJnByaXYtPmxvY2spOwogfQogCiBzdGF0aWMgaW50IGY4MTIzMl90aW9jbWdl dChzdHJ1Y3QgdHR5X3N0cnVjdCAqdHR5KQo= 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=-8.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 081A5C43219 for ; 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[59.120.186.245]) by smtp.gmail.com with ESMTPSA id s74sm353739pfs.26.2019.04.29.18.22.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 29 Apr 2019 18:22:47 -0700 (PDT) From: "Ji-Ze Hong (Peter Hong)" X-Google-Original-From: "Ji-Ze Hong (Peter Hong)" To: peter_hong@fintek.com.tw, johan@kernel.org, gregkh@linuxfoundation.org Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, "Ji-Ze Hong (Peter Hong)" Subject: [PATCH V9 4/4] USB: serial: f81232: implement break control Date: Tue, 30 Apr 2019 09:22:32 +0800 Message-Id: <1556587352-19500-4-git-send-email-hpeter+linux_kernel@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1556587352-19500-1-git-send-email-hpeter+linux_kernel@gmail.com> References: <1556587352-19500-1-git-send-email-hpeter+linux_kernel@gmail.com> Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Message-ID: <20190430012232.6Zlfxxt6RN__pwRK53yilNwdlVaYucIk0jTzgX4IhjE@z> Implement Fintek F81232 break on/off with LCR register. It's the same with 16550A LCR register layout. Signed-off-by: Ji-Ze Hong (Peter Hong) --- v9: 1: no change v8: 1: no change v7: 1: no change v6: 1: no change v5: 1: no change v4: 1: no change v3: 1: using shadow_lcr to save LCR in f81232_break_ctl() drivers/usb/serial/f81232.c | 29 +++++++++++++++++++++++------ 1 file changed, 23 insertions(+), 6 deletions(-) diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c index 6a1e6a27ce16..562c9babd144 100644 --- a/drivers/usb/serial/f81232.c +++ b/drivers/usb/serial/f81232.c @@ -65,6 +65,7 @@ struct f81232_private { struct mutex lock; u8 modem_control; u8 modem_status; + u8 shadow_lcr; speed_t baud_base; struct work_struct lsr_work; struct work_struct interrupt_work; @@ -377,13 +378,23 @@ static void f81232_process_read_urb(struct urb *urb) static void f81232_break_ctl(struct tty_struct *tty, int break_state) { - /* FIXME - Stubbed out for now */ + struct usb_serial_port *port = tty->driver_data; + struct f81232_private *priv = usb_get_serial_port_data(port); + int status; - /* - * break_state = -1 to turn on break, and 0 to turn off break - * see drivers/char/tty_io.c to see it used. - * last_set_data_urb_value NEVER has the break bit set in it. - */ + mutex_lock(&priv->lock); + + if (break_state) + priv->shadow_lcr |= UART_LCR_SBC; + else + priv->shadow_lcr &= ~UART_LCR_SBC; + + status = f81232_set_register(port, LINE_CONTROL_REGISTER, + priv->shadow_lcr); + if (status) + dev_err(&port->dev, "set break failed: %d\n", status); + + mutex_unlock(&priv->lock); } static int f81232_find_clk(speed_t baudrate) @@ -519,6 +530,7 @@ static int f81232_port_disable(struct usb_serial_port *port) static void f81232_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { + struct f81232_private *priv = usb_get_serial_port_data(port); u8 new_lcr = 0; int status = 0; speed_t baudrate; @@ -572,11 +584,16 @@ static void f81232_set_termios(struct tty_struct *tty, break; } + mutex_lock(&priv->lock); + + new_lcr |= (priv->shadow_lcr & UART_LCR_SBC); status = f81232_set_register(port, LINE_CONTROL_REGISTER, new_lcr); if (status) { dev_err(&port->dev, "%s failed to set LCR: %d\n", __func__, status); } + + mutex_unlock(&priv->lock); } static int f81232_tiocmget(struct tty_struct *tty) -- 2.7.4