Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754286AbaGKWFB (ORCPT ); Fri, 11 Jul 2014 18:05:01 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:49536 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751059AbaGKWE7 (ORCPT ); Fri, 11 Jul 2014 18:04:59 -0400 From: Suman Anna To: Tony Lindgren CC: Jassi Brar , Dave Gerlach , Pavel Machek , , , , , Suman Anna , Jassi Brar , Rob Herring Subject: [PATCHv2 2/5] mailbox/omap: add support for parsing dt devices Date: Fri, 11 Jul 2014 17:04:09 -0500 Message-ID: <1405116252-53612-3-git-send-email-s-anna@ti.com> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1405116252-53612-1-git-send-email-s-anna@ti.com> References: <1405116252-53612-1-git-send-email-s-anna@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Logic has been added to the OMAP2+ mailbox code to parse the mailbox dt nodes and construct the different sub-mailboxes associated with the instance. The DT representation of the sub-mailbox devices is different from legacy platform data representation to allow flexibility of interrupt configuration between Tx and Rx fifos (to also possibly allow simplex devices in the future). The DT representation gathers similar information that was being passed previously through the platform data, except for the number of fifos, interrupts and interrupt type information, which are gathered through driver compatible match data. The non-DT support has to be maintained for now to not break OMAP3 legacy boot, and the legacy-style code will be cleaned up once OMAP3 is also converted to DT-boot only. Cc: Jassi Brar Cc: Rob Herring Signed-off-by: Suman Anna --- drivers/mailbox/omap-mailbox.c | 156 ++++++++++++++++++++++++++++++++++------- 1 file changed, 132 insertions(+), 24 deletions(-) diff --git a/drivers/mailbox/omap-mailbox.c b/drivers/mailbox/omap-mailbox.c index a27e00e..73eb0fb 100644 --- a/drivers/mailbox/omap-mailbox.c +++ b/drivers/mailbox/omap-mailbox.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #include #include @@ -94,6 +95,18 @@ struct omap_mbox_device { struct list_head elem; }; +struct omap_mbox_fifo_info { + int tx_id; + int tx_usr; + int tx_irq; + + int rx_id; + int rx_usr; + int rx_irq; + + const char *name; +}; + struct omap_mbox { const char *name; int irq; @@ -587,24 +600,118 @@ static int omap_mbox_unregister(struct omap_mbox_device *mdev) return 0; } +static const struct of_device_id omap_mailbox_of_match[] = { + { + .compatible = "ti,omap2-mailbox", + .data = (void *)MBOX_INTR_CFG_TYPE1, + }, + { + .compatible = "ti,omap3-mailbox", + .data = (void *)MBOX_INTR_CFG_TYPE1, + }, + { + .compatible = "ti,omap4-mailbox", + .data = (void *)MBOX_INTR_CFG_TYPE2, + }, + { + /* end */ + }, +}; +MODULE_DEVICE_TABLE(of, omap_mailbox_of_match); + static int omap_mbox_probe(struct platform_device *pdev) { struct resource *mem; int ret; struct omap_mbox **list, *mbox, *mboxblk; struct omap_mbox_pdata *pdata = pdev->dev.platform_data; - struct omap_mbox_dev_info *info; + struct omap_mbox_dev_info *info = NULL; + struct omap_mbox_fifo_info *finfo, *finfoblk; struct omap_mbox_device *mdev; struct omap_mbox_fifo *fifo; - u32 intr_type; + struct device_node *node = pdev->dev.of_node; + struct device_node *child; + const struct of_device_id *match; + u32 intr_type, info_count; + u32 num_users, num_fifos; + u32 tmp[3]; u32 l; int i; - if (!pdata || !pdata->info_cnt || !pdata->info) { + if (!node && (!pdata || !pdata->info_cnt || !pdata->info)) { pr_err("%s: platform not supported\n", __func__); return -ENODEV; } + if (node) { + match = of_match_device(omap_mailbox_of_match, &pdev->dev); + if (!match) + return -ENODEV; + intr_type = (u32)match->data; + + if (of_property_read_u32(node, "ti,mbox-num-users", + &num_users)) + return -ENODEV; + + if (of_property_read_u32(node, "ti,mbox-num-fifos", + &num_fifos)) + return -ENODEV; + + info_count = of_get_available_child_count(node); + if (!info_count) { + dev_err(&pdev->dev, "no available mbox devices found\n"); + return -ENODEV; + } + } else { /* non-DT device creation */ + info_count = pdata->info_cnt; + info = pdata->info; + intr_type = pdata->intr_type; + num_users = pdata->num_users; + num_fifos = pdata->num_fifos; + } + + finfoblk = devm_kzalloc(&pdev->dev, info_count * sizeof(*finfoblk), + GFP_KERNEL); + if (!finfoblk) + return -ENOMEM; + + finfo = finfoblk; + child = NULL; + for (i = 0; i < info_count; i++, finfo++) { + if (!node) { + finfo->tx_id = info->tx_id; + finfo->rx_id = info->rx_id; + finfo->tx_usr = info->usr_id; + finfo->tx_irq = info->irq_id; + finfo->rx_usr = info->usr_id; + finfo->rx_irq = info->irq_id; + finfo->name = info->name; + info++; + } else { + child = of_get_next_available_child(node, child); + ret = of_property_read_u32_array(child, "ti,mbox-tx", + tmp, ARRAY_SIZE(tmp)); + if (ret) + return ret; + finfo->tx_id = tmp[0]; + finfo->tx_irq = tmp[1]; + finfo->tx_usr = tmp[2]; + + ret = of_property_read_u32_array(child, "ti,mbox-rx", + tmp, ARRAY_SIZE(tmp)); + if (ret) + return ret; + finfo->rx_id = tmp[0]; + finfo->rx_irq = tmp[1]; + finfo->rx_usr = tmp[2]; + + finfo->name = child->name; + } + if (finfo->tx_id >= num_fifos || finfo->rx_id >= num_fifos || + finfo->tx_usr >= num_users || finfo->rx_usr >= num_users) + return -EINVAL; + } + mdev = devm_kzalloc(&pdev->dev, sizeof(*mdev), GFP_KERNEL); if (!mdev) return -ENOMEM; @@ -615,41 +722,40 @@ static int omap_mbox_probe(struct platform_device *pdev) return PTR_ERR(mdev->mbox_base); /* allocate one extra for marking end of list */ - list = devm_kzalloc(&pdev->dev, (pdata->info_cnt + 1) * sizeof(*list), + list = devm_kzalloc(&pdev->dev, (info_count + 1) * sizeof(*list), GFP_KERNEL); if (!list) return -ENOMEM; - mboxblk = devm_kzalloc(&pdev->dev, pdata->info_cnt * sizeof(*mbox), + mboxblk = devm_kzalloc(&pdev->dev, info_count * sizeof(*mbox), GFP_KERNEL); if (!mboxblk) return -ENOMEM; - info = pdata->info; - intr_type = pdata->intr_type; mbox = mboxblk; - for (i = 0; i < pdata->info_cnt; i++, info++) { + finfo = finfoblk; + for (i = 0; i < info_count; i++, finfo++) { fifo = &mbox->tx_fifo; - fifo->msg = MAILBOX_MESSAGE(info->tx_id); - fifo->fifo_stat = MAILBOX_FIFOSTATUS(info->tx_id); - fifo->intr_bit = MAILBOX_IRQ_NOTFULL(info->tx_id); - fifo->irqenable = MAILBOX_IRQENABLE(intr_type, info->usr_id); - fifo->irqstatus = MAILBOX_IRQSTATUS(intr_type, info->usr_id); - fifo->irqdisable = MAILBOX_IRQDISABLE(intr_type, info->usr_id); + fifo->msg = MAILBOX_MESSAGE(finfo->tx_id); + fifo->fifo_stat = MAILBOX_FIFOSTATUS(finfo->tx_id); + fifo->intr_bit = MAILBOX_IRQ_NOTFULL(finfo->tx_id); + fifo->irqenable = MAILBOX_IRQENABLE(intr_type, finfo->tx_usr); + fifo->irqstatus = MAILBOX_IRQSTATUS(intr_type, finfo->tx_usr); + fifo->irqdisable = MAILBOX_IRQDISABLE(intr_type, finfo->tx_usr); fifo = &mbox->rx_fifo; - fifo->msg = MAILBOX_MESSAGE(info->rx_id); - fifo->msg_stat = MAILBOX_MSGSTATUS(info->rx_id); - fifo->intr_bit = MAILBOX_IRQ_NEWMSG(info->rx_id); - fifo->irqenable = MAILBOX_IRQENABLE(intr_type, info->usr_id); - fifo->irqstatus = MAILBOX_IRQSTATUS(intr_type, info->usr_id); - fifo->irqdisable = MAILBOX_IRQDISABLE(intr_type, info->usr_id); + fifo->msg = MAILBOX_MESSAGE(finfo->rx_id); + fifo->msg_stat = MAILBOX_MSGSTATUS(finfo->rx_id); + fifo->intr_bit = MAILBOX_IRQ_NEWMSG(finfo->rx_id); + fifo->irqenable = MAILBOX_IRQENABLE(intr_type, finfo->rx_usr); + fifo->irqstatus = MAILBOX_IRQSTATUS(intr_type, finfo->rx_usr); + fifo->irqdisable = MAILBOX_IRQDISABLE(intr_type, finfo->rx_usr); mbox->intr_type = intr_type; mbox->parent = mdev; - mbox->name = info->name; - mbox->irq = platform_get_irq(pdev, info->irq_id); + mbox->name = finfo->name; + mbox->irq = platform_get_irq(pdev, finfo->tx_irq); if (mbox->irq < 0) return mbox->irq; list[i] = mbox++; @@ -657,8 +763,8 @@ static int omap_mbox_probe(struct platform_device *pdev) mutex_init(&mdev->cfg_lock); mdev->dev = &pdev->dev; - mdev->num_users = pdata->num_users; - mdev->num_fifos = pdata->num_fifos; + mdev->num_users = num_users; + mdev->num_fifos = num_fifos; mdev->mboxes = list; ret = omap_mbox_register(mdev); if (ret) @@ -684,6 +790,7 @@ static int omap_mbox_probe(struct platform_device *pdev) if (ret < 0) goto unregister; + devm_kfree(&pdev->dev, finfoblk); return 0; unregister: @@ -708,6 +815,7 @@ static struct platform_driver omap_mbox_driver = { .driver = { .name = "omap-mailbox", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(omap_mailbox_of_match), }, }; -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/