[PATCHv3,2/8] mailbox/omap: add support for parsing dt devices

Message ID	1375825216-18119-1-git-send-email-s-anna@ti.com (mailing list archive)
State	New, archived
Headers	show Return-Path: <linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org> From: Suman Anna <s-anna@ti.com> To: Tony Lindgren <tony@atomide.com>, Benoit Cousson <benoit.cousson@linaro.org> Subject: [PATCHv3 2/8] mailbox/omap: add support for parsing dt devices Date: Tue, 6 Aug 2013 16:40:16 -0500 Message-ID: <1375825216-18119-1-git-send-email-s-anna@ti.com> MIME-Version: 1.0 Cc: Ohad Ben-Cohen <ohad@wizery.com>, devicetree@vger.kernel.org, Paul Walmsley <paul@pwsan.com>, Suman Anna <s-anna@ti.com>, Jassi Brar <jaswinder.singh@linaro.org>, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org Precedence: list Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org

diff --git a/Documentation/devicetree/bindings/mailbox/omap-mailbox.txt b/Documentation/devicetree/bindings/mailbox/omap-mailbox.txt new file mode 100644 index 0000000..8ffb08a --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/omap-mailbox.txt @@ -0,0 +1,43 @@ +OMAP2+ Mailbox Driver + +Required properties: +- compatible: Should be one of the following, + "ti,omap2-mailbox" for + OMAP2420, OMAP2430, OMAP3430, OMAP3630 SoCs + "ti,omap4-mailbox" for + OMAP44xx, OMAP54xx, AM33xx, AM43xx, DRA7xx SoCs +- reg: Contains the mailbox register address range (base address + and length) +- interrupts: Contains the interrupt information for the mailbox + device. The format is dependent on which interrupt + controller the OMAP device uses +- ti,hwmods: Name of the hwmod associated with the mailbox +- ti,mbox-num-users: Number of targets (processor devices) that the mailbox device + can interrupt +- ti,mbox-num-fifos: Number of h/w fifos within the mailbox device +- ti,mbox-names: Array of the names of the mailboxes +- ti,mbox-data: Mailbox descriptor data private to each mailbox. The 4 + cells represent the following data, + Cell #1 (tx_id) - mailbox fifo id used for + transmitting messages + Cell #2 (rx_id) - mailbox fifo id on which messages + are received + Cell #3 (irq_id) - irq identifier index number to use + from the interrupts data + Cell #4 (usr_id) - mailbox user id for identifying the + interrupt into the MPU interrupt + controller. + +Example: + +/* OMAP4 */ +mailbox: mailbox@4a0f4000 { + compatible = "ti,omap4-mailbox"; + reg = <0x4a0f4000 0x200>; + interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>; + ti,hwmods = "mailbox"; + ti,mbox-num-users = <3>; + ti,mbox-num-fifos = <8>; + ti,mbox-names = "mbox-ipu", "mbox-dsp"; + ti,mbox-data = <0 1 0 0>, <3 2 0 0>; +}; diff --git a/drivers/mailbox/mailbox-omap2.c b/drivers/mailbox/mailbox-omap2.c index 6c0687c..759f72c 100644 --- a/drivers/mailbox/mailbox-omap2.c +++ b/drivers/mailbox/mailbox-omap2.c @@ -14,6 +14,7 @@ #include <linux/slab.h> #include <linux/clk.h> #include <linux/err.h> +#include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/io.h> #include <linux/pm_runtime.h> @@ -222,6 +223,21 @@ static struct omap_mbox_ops omap2_mbox_ops = { .restore_ctx = omap2_mbox_restore_ctx, }; +static const struct of_device_id omap_mailbox_of_match[] = { + { + .compatible = "ti,omap2-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 omap2_mbox_probe(struct platform_device *pdev) { struct resource *mem; @@ -229,47 +245,127 @@ static int omap2_mbox_probe(struct platform_device *pdev) struct omap_mbox **list, *mbox, *mboxblk; struct omap_mbox2_priv *priv, *privblk; struct omap_mbox_pdata *pdata = pdev->dev.platform_data; - struct omap_mbox_dev_info *info; struct omap_mbox_device *mdev; - int i; - - if (!pdata || !pdata->info_cnt || !pdata->info) { + struct omap_mbox_dev_info *info, *of_info = NULL; + struct device_node *node = pdev->dev.of_node; + int i, j; + u32 info_count = 0, intr_type = 0; + u32 num_users = 0, num_fifos = 0; + u32 dlen, dsize = 4; + u32 *tmp; + const __be32 *mbox_data; + + if (!node && (!pdata || !pdata->info_cnt || !pdata->info)) { pr_err("%s: platform not supported\n", __func__); return -ENODEV; } + if (node) { + intr_type = (u32)of_match_device(omap_mailbox_of_match, + &pdev->dev)->data; + if (intr_type != 0 && intr_type != 1) { + dev_err(&pdev->dev, "invalid match data value\n"); + return -EINVAL; + } + + if (of_property_read_u32(node, "ti,mbox-num-users", + &num_users)) { + dev_err(&pdev->dev, + "no ti,mbox-num-users configuration found\n"); + return -ENODEV; + } + + if (of_property_read_u32(node, "ti,mbox-num-fifos", + &num_fifos)) { + dev_err(&pdev->dev, + "no ti,mbox-num-fifos configuration found\n"); + return -ENODEV; + } + + info_count = of_property_count_strings(node, "ti,mbox-names"); + if (!info_count) { + dev_err(&pdev->dev, "no mbox devices found\n"); + return -ENODEV; + } + + mbox_data = of_get_property(node, "ti,mbox-data", &dlen); + if (!mbox_data) { + dev_err(&pdev->dev, "no mbox device data found\n"); + return -ENODEV; + } + dlen /= sizeof(dsize); + if (dlen != dsize * info_count) { + dev_err(&pdev->dev, "mbox device data is truncated\n"); + return -ENODEV; + } + + of_info = kzalloc(info_count * sizeof(*of_info), GFP_KERNEL); + if (!of_info) + return -ENOMEM; + + i = 0; + while (i < info_count) { + info = of_info + i; + if (of_property_read_string_index(node, + "ti,mbox-names", i, &info->name)) { + dev_err(&pdev->dev, + "mbox_name [%d] read failed\n", i); + ret = -ENODEV; + goto free_of; + } + + tmp = &info->tx_id; + for (j = 0; j < dsize; j++) { + tmp[j] = of_read_number( + mbox_data + j + (i * dsize), 1); + } + i++; + } + } + + if (!node) { /* 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; + } else { + info = of_info; + } + mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); - if (!mdev) - return -ENOMEM; + if (!mdev) { + ret = -ENOMEM; + goto free_of; + } /* allocate one extra for marking end of list */ - list = kzalloc((pdata->info_cnt + 1) * sizeof(*list), GFP_KERNEL); + list = kzalloc((info_count + 1) * sizeof(*list), GFP_KERNEL); if (!list) { ret = -ENOMEM; goto free_mdev; } - mboxblk = mbox = kzalloc(pdata->info_cnt * sizeof(*mbox), GFP_KERNEL); + mboxblk = mbox = kzalloc(info_count * sizeof(*mbox), GFP_KERNEL); if (!mboxblk) { ret = -ENOMEM; goto free_list; } - privblk = priv = kzalloc(pdata->info_cnt * sizeof(*priv), GFP_KERNEL); + privblk = priv = kzalloc(info_count * sizeof(*priv), GFP_KERNEL); if (!privblk) { ret = -ENOMEM; goto free_mboxblk; } - info = pdata->info; - for (i = 0; i < pdata->info_cnt; i++, info++, priv++) { + for (i = 0; i < info_count; i++, info++, priv++) { priv->tx_fifo.msg = MAILBOX_MESSAGE(info->tx_id); priv->tx_fifo.fifo_stat = MAILBOX_FIFOSTATUS(info->tx_id); priv->rx_fifo.msg = MAILBOX_MESSAGE(info->rx_id); priv->rx_fifo.msg_stat = MAILBOX_MSGSTATUS(info->rx_id); priv->notfull_bit = MAILBOX_IRQ_NOTFULL(info->tx_id); priv->newmsg_bit = MAILBOX_IRQ_NEWMSG(info->rx_id); - if (pdata->intr_type) { + if (intr_type) { priv->irqenable = OMAP4_MAILBOX_IRQENABLE(info->usr_id); priv->irqstatus = OMAP4_MAILBOX_IRQSTATUS(info->usr_id); priv->irqdisable = @@ -279,7 +375,7 @@ static int omap2_mbox_probe(struct platform_device *pdev) priv->irqstatus = MAILBOX_IRQSTATUS(info->usr_id); priv->irqdisable = MAILBOX_IRQENABLE(info->usr_id); } - priv->intr_type = pdata->intr_type; + priv->intr_type = intr_type; mbox->priv = priv; mbox->parent = mdev; @@ -307,8 +403,8 @@ static int omap2_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(&pdev->dev, list); if (ret) @@ -317,6 +413,7 @@ static int omap2_mbox_probe(struct platform_device *pdev) pm_runtime_enable(mdev->dev); + kfree(of_info); return 0; unmap_mbox: @@ -329,6 +426,8 @@ free_list: kfree(list); free_mdev: kfree(mdev); +free_of: + kfree(of_info); return ret; } @@ -358,6 +457,7 @@ static struct platform_driver omap2_mbox_driver = { .remove = omap2_mbox_remove, .driver = { .name = "omap-mailbox", + .of_match_table = omap_mailbox_of_match, }, };

[PATCHv3,2/8] mailbox/omap: add support for parsing dt devices

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