From patchwork Fri Jan 11 13:13:04 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lee Jones X-Patchwork-Id: 13989 Return-Path: X-Original-To: patchwork@peony.canonical.com Delivered-To: patchwork@peony.canonical.com Received: from fiordland.canonical.com (fiordland.canonical.com [91.189.94.145]) by peony.canonical.com (Postfix) with ESMTP id 030E923E27 for ; Fri, 11 Jan 2013 13:13:53 +0000 (UTC) Received: from mail-vc0-f172.google.com (mail-vc0-f172.google.com [209.85.220.172]) by fiordland.canonical.com (Postfix) with ESMTP id 93171A18C70 for ; Fri, 11 Jan 2013 13:13:52 +0000 (UTC) Received: by mail-vc0-f172.google.com with SMTP id fw7so1403725vcb.31 for ; Fri, 11 Jan 2013 05:13:52 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-received:x-forwarded-to:x-forwarded-for:delivered-to:x-received :received-spf:x-received:from:to:cc:subject:date:message-id:x-mailer :in-reply-to:references:x-gm-message-state; bh=C5uXZCJF9zN5zR8dG/z1xriIu0PUe44krdFq6wOxggg=; b=T/Bzx7KFP29PtRjdqIp7CAzfHbHxhp2ZtuQ8427cwf3hXSbyUcRwQ33hb5KsJamE9B Du0y8Df6HFwzv80lGyslUGTG7avJ6Bqepo1kHIdA1PcZYJX8iFwzptU1tNZtIBQiZac8 impstgGBkBGMShs6OolI8D7WV1HT+k7WMaKLCm4YhZehI+Egs5EpHs42v1JD6ATHeBnO nnuUnWfPoShPfGm9mE6e5it+oSExOA4XwJufGXw1v3w6VGfCuZq+CN/TImSlol7jnL0F 9XnCa8kLwqffM7V3L0Zlfl8ALUDagBomTyrdELhlAWWNPudvvOS3hLxUu6WGb+9+TGPx 3xcA== X-Received: by 10.58.74.168 with SMTP id u8mr964829vev.59.1357910032102; Fri, 11 Jan 2013 05:13:52 -0800 (PST) X-Forwarded-To: linaro-patchwork@canonical.com X-Forwarded-For: patch@linaro.org linaro-patchwork@canonical.com Delivered-To: patches@linaro.org Received: by 10.58.145.101 with SMTP id st5csp111256veb; Fri, 11 Jan 2013 05:13:51 -0800 (PST) X-Received: by 10.180.97.68 with SMTP id dy4mr15206316wib.7.1357910030760; Fri, 11 Jan 2013 05:13:50 -0800 (PST) Received: from mail-we0-f175.google.com (mail-we0-f175.google.com [74.125.82.175]) by mx.google.com with ESMTPS id e11si8696533wjs.0.2013.01.11.05.13.50 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 11 Jan 2013 05:13:50 -0800 (PST) Received-SPF: neutral (google.com: 74.125.82.175 is neither permitted nor denied by best guess record for domain of lee.jones@linaro.org) client-ip=74.125.82.175; Authentication-Results: mx.google.com; spf=neutral (google.com: 74.125.82.175 is neither permitted nor denied by best guess record for domain of lee.jones@linaro.org) smtp.mail=lee.jones@linaro.org Received: by mail-we0-f175.google.com with SMTP id z53so851714wey.34 for ; Fri, 11 Jan 2013 05:13:50 -0800 (PST) X-Received: by 10.180.86.36 with SMTP id m4mr15293177wiz.5.1357910030360; Fri, 11 Jan 2013 05:13:50 -0800 (PST) Received: from localhost.localdomain (cpc1-aztw13-0-0-cust473.18-1.cable.virginmedia.com. [77.102.241.218]) by mx.google.com with ESMTPS id p2sm7204515wic.7.2013.01.11.05.13.48 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 11 Jan 2013 05:13:49 -0800 (PST) From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: arnd@arndb.de, linus.walleij@stericsson.com, cbouatmailru@gmail.com, Marcus Cooper , Lee Jones Subject: [PATCH 16/18] power: ab8500_charger: Adds support for legacy USB chargers Date: Fri, 11 Jan 2013 13:13:04 +0000 Message-Id: <1357909986-9262-17-git-send-email-lee.jones@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1357909986-9262-1-git-send-email-lee.jones@linaro.org> References: <1357909986-9262-1-git-send-email-lee.jones@linaro.org> X-Gm-Message-State: ALoCoQnG74jdKT6GjJmNyKYzuXXHwZmI1Ad0HnHolOcHl9OMoEy6hYohUb2WJmo8004yUdgV+v/O From: Marcus Cooper A Legacy USB charger should be handled directly by the charger driver. Signed-off-by: Lee Jones Signed-off-by: Marcus Cooper Reviewed-by: Karl KOMIEROWSKI Reviewed-by: Jonas ABERG --- drivers/power/ab8500_charger.c | 79 ++++++++++++++++++++++++++++++++-------- 1 file changed, 63 insertions(+), 16 deletions(-) diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c index 2769e91..0957240 100644 --- a/drivers/power/ab8500_charger.c +++ b/drivers/power/ab8500_charger.c @@ -88,6 +88,9 @@ /* Step up/down delay in us */ #define STEP_UDELAY 1000 +/* Wait for enumeration before charging in ms */ +#define WAIT_FOR_USB_ENUMERATION 5 * 1000 + #define CHARGER_STATUS_POLL 10 /* in ms */ /* UsbLineStatus register - usb types */ @@ -201,6 +204,7 @@ struct ab8500_charger_usb_state { * charger is enabled * @vbat Battery voltage * @old_vbat Previously measured battery voltage + * @usb_device_is_unrecognised USB device is unrecognised by the hardware * @autopower Indicate if we should have automatic pwron after pwrloss * @autopower_cfg platform specific power config support for "pwron after pwrloss" * @parent: Pointer to the struct ab8500 @@ -219,6 +223,7 @@ struct ab8500_charger_usb_state { * @check_usbchgnotok_work: Work for checking USB charger not ok status * @kick_wd_work: Work for kicking the charger watchdog in case * of ABB rev 1.* due to the watchog logic bug + * @attach_work: Work for checking the usb enumeration * @ac_charger_attached_work: Work for checking if AC charger is still * connected * @usb_charger_attached_work: Work for checking if USB charger is still @@ -243,6 +248,7 @@ struct ab8500_charger { bool vddadc_en_usb; int vbat; int old_vbat; + bool usb_device_is_unrecognised; bool autopower; bool autopower_cfg; struct ab8500 *parent; @@ -260,6 +266,7 @@ struct ab8500_charger { struct delayed_work check_hw_failure_work; struct delayed_work check_usbchgnotok_work; struct delayed_work kick_wd_work; + struct delayed_work attach_work; struct delayed_work ac_charger_attached_work; struct delayed_work usb_charger_attached_work; struct work_struct ac_work; @@ -597,6 +604,8 @@ static int ab8500_charger_max_usb_curr(struct ab8500_charger *di, { int ret = 0; + di->usb_device_is_unrecognised = false; + switch (link_status) { case USB_STAT_STD_HOST_NC: case USB_STAT_STD_HOST_C_NS: @@ -642,9 +651,15 @@ static int ab8500_charger_max_usb_curr(struct ab8500_charger *di, dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status, di->max_usb_in_curr); break; + case USB_STAT_NOT_CONFIGURED: + if (di->vbus_detected) { + di->usb_device_is_unrecognised = true; + dev_dbg(di->dev, "USB Type - Legacy charger.\n"); + di->max_usb_in_curr = USB_CH_IP_CUR_LVL_1P5; + break; + } case USB_STAT_HM_IDGND: case USB_STAT_NOT_VALID_LINK: - case USB_STAT_NOT_CONFIGURED: dev_err(di->dev, "USB Type - Charging not allowed\n"); di->max_usb_in_curr = USB_CH_IP_CUR_LVL_0P05; ret = -ENXIO; @@ -1912,6 +1927,29 @@ static void ab8500_charger_detect_usb_type_work(struct work_struct *work) } /** + * ab8500_charger_usb_link_attach_work() - delayd work to detect USB type + * @work: pointer to the work_struct structure + * + * Detect the type of USB plugged + */ +static void ab8500_charger_usb_link_attach_work(struct work_struct *work) +{ + struct ab8500_charger *di = + container_of(work, struct ab8500_charger, attach_work.work); + int ret; + + /* Update maximum input current if USB enumeration is not detected */ + if (!di->usb.charger_online) { + ret = ab8500_charger_set_vbus_in_curr(di, di->max_usb_in_curr); + if (ret) + return; + } + + ab8500_charger_set_usb_connected(di, true); + ab8500_power_supply_changed(di, &di->usb_chg.psy); +} + +/** * ab8500_charger_usb_link_status_work() - work to detect USB type * @work: pointer to the work_struct structure * @@ -1937,23 +1975,29 @@ static void ab8500_charger_usb_link_status_work(struct work_struct *work) di->vbus_detected = 0; ab8500_charger_set_usb_connected(di, false); ab8500_power_supply_changed(di, &di->usb_chg.psy); - } else { - di->vbus_detected = 1; - ret = ab8500_charger_read_usb_type(di); - if (!ret) { - /* Update maximum input current */ - ret = ab8500_charger_set_vbus_in_curr(di, - di->max_usb_in_curr); - if (ret) - return; + return; + } - ab8500_charger_set_usb_connected(di, true); - ab8500_power_supply_changed(di, &di->usb_chg.psy); - } else if (ret == -ENXIO) { - /* No valid charger type detected */ - ab8500_charger_set_usb_connected(di, false); - ab8500_power_supply_changed(di, &di->usb_chg.psy); + di->vbus_detected = 1; + ret = ab8500_charger_read_usb_type(di); + if (!ret) { + if (di->usb_device_is_unrecognised) { + dev_dbg(di->dev, + "Potential Legacy Charger device. " + "Delay work for %d msec for USB enum " + "to finish", + WAIT_FOR_USB_ENUMERATION); + queue_delayed_work(di->charger_wq, + &di->attach_work, + msecs_to_jiffies(WAIT_FOR_USB_ENUMERATION)); + } else { + queue_delayed_work(di->charger_wq, + &di->attach_work, 0); } + } else if (ret == -ENXIO) { + /* No valid charger type detected */ + ab8500_charger_set_usb_connected(di, false); + ab8500_power_supply_changed(di, &di->usb_chg.psy); } } @@ -2916,6 +2960,9 @@ static int __devinit ab8500_charger_probe(struct platform_device *pdev) INIT_DEFERRABLE_WORK(&di->check_vbat_work, ab8500_charger_check_vbat_work); + INIT_DELAYED_WORK(&di->attach_work, + ab8500_charger_usb_link_attach_work); + /* Init work for charger detection */ INIT_WORK(&di->usb_link_status_work, ab8500_charger_usb_link_status_work);