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authorSuman Anna <s-anna@ti.com>2014-09-10 21:20:59 +0200
committerTony Lindgren <tony@atomide.com>2014-09-11 20:39:14 +0200
commit75288cc66dc478b32e43970dd6913396526504ae (patch)
tree570a96edd8b09de0204e038513ddcbcc4e96cfd4 /drivers
parentDocumentation: dt: add omap mailbox bindings (diff)
downloadlinux-75288cc66dc478b32e43970dd6913396526504ae.tar.xz
linux-75288cc66dc478b32e43970dd6913396526504ae.zip
mailbox/omap: add support for parsing dt devices
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 interrupt type information, which is 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 <jassisinghbrar@gmail.com> Cc: Rob Herring <robh+dt@kernel.org> Signed-off-by: Suman Anna <s-anna@ti.com> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mailbox/omap-mailbox.c156
1 files changed, 132 insertions, 24 deletions
diff --git a/drivers/mailbox/omap-mailbox.c b/drivers/mailbox/omap-mailbox.c
index a27e00e63a8a..bcc7ee129276 100644
--- a/drivers/mailbox/omap-mailbox.c
+++ b/drivers/mailbox/omap-mailbox.c
@@ -31,6 +31,7 @@
#include <linux/err.h>
#include <linux/notifier.h>
#include <linux/module.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/platform_data/mailbox-omap.h>
@@ -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) {
+ 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;
+ } else {
+ 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++;
+ }
+ 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),
},
};