2  * OMAP Remote Processor driver
7  * Ohad Ben-Cohen <ohad@wizery.com>
11  * Suman Anna <s-anna@ti.com>
12  * Hari Kanigeri <h-kanigeri2@ti.com>
28 #include <linux/dma-mapping.h>
31 #include <linux/omap-mailbox.h>
33 #include <linux/platform_data/remoteproc-omap.h>
39  * struct omap_rproc - omap remote processor state
40  * @mbox: mailbox channel handle
41  * @client: mailbox client to request the mailbox channel
51  * omap_rproc_mbox_callback() - inbound mailbox message handler
52  * @client: mailbox client pointer used for requesting the mailbox channel
53  * @data: mailbox payload
55  * This handler is invoked by omap's mailbox driver whenever a mailbox
56  * message is received. Usually, the mailbox payload simply contains
60  * In addition to virtqueue indices, we also have some out-of-band values
68 	struct device *dev = oproc->rproc->dev.parent;  in omap_rproc_mbox_callback()
69 	const char *name = oproc->rproc->name;  in omap_rproc_mbox_callback()
77 		dev_err(dev, "omap rproc %s crashed\n", name);  in omap_rproc_mbox_callback()
84 		if (rproc_vq_interrupt(oproc->rproc, msg) == IRQ_NONE)  in omap_rproc_mbox_callback()
92 	struct omap_rproc *oproc = rproc->priv;  in omap_rproc_kick()
93 	struct device *dev = rproc->dev.parent;  in omap_rproc_kick()
96 	/* send the index of the triggered virtqueue in the mailbox payload */  in omap_rproc_kick()
97 	ret = mbox_send_message(oproc->mbox, (void *)vqid);  in omap_rproc_kick()
99 		dev_err(dev, "failed to send mailbox message, status = %d\n",  in omap_rproc_kick()
112 	struct omap_rproc *oproc = rproc->priv;  in omap_rproc_start()
113 	struct device *dev = rproc->dev.parent;  in omap_rproc_start()
115 	struct omap_rproc_pdata *pdata = pdev->dev.platform_data;  in omap_rproc_start()
117 	struct mbox_client *client = &oproc->client;  in omap_rproc_start()
119 	if (pdata->set_bootaddr)  in omap_rproc_start()
120 		pdata->set_bootaddr(rproc->bootaddr);  in omap_rproc_start()
122 	client->dev = dev;  in omap_rproc_start()
123 	client->tx_done = NULL;  in omap_rproc_start()
124 	client->rx_callback = omap_rproc_mbox_callback;  in omap_rproc_start()
125 	client->tx_block = false;  in omap_rproc_start()
126 	client->knows_txdone = false;  in omap_rproc_start()
128 	oproc->mbox = omap_mbox_request_channel(client, pdata->mbox_name);  in omap_rproc_start()
129 	if (IS_ERR(oproc->mbox)) {  in omap_rproc_start()
130 		ret = -EBUSY;  in omap_rproc_start()
132 			PTR_ERR(oproc->mbox));  in omap_rproc_start()
137 	 * Ping the remote processor. this is only for sanity-sake;  in omap_rproc_start()
141 	 * will wait in the mailbox fifo until the remote processor is booted.  in omap_rproc_start()
143 	ret = mbox_send_message(oproc->mbox, (void *)RP_MBOX_ECHO_REQUEST);  in omap_rproc_start()
149 	ret = pdata->device_enable(pdev);  in omap_rproc_start()
158 	mbox_free_channel(oproc->mbox);  in omap_rproc_start()
165 	struct device *dev = rproc->dev.parent;  in omap_rproc_stop()
167 	struct omap_rproc_pdata *pdata = pdev->dev.platform_data;  in omap_rproc_stop()
168 	struct omap_rproc *oproc = rproc->priv;  in omap_rproc_stop()
171 	ret = pdata->device_shutdown(pdev);  in omap_rproc_stop()
175 	mbox_free_channel(oproc->mbox);  in omap_rproc_stop()
188 	struct omap_rproc_pdata *pdata = pdev->dev.platform_data;  in omap_rproc_probe()
193 	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));  in omap_rproc_probe()
195 		dev_err(&pdev->dev, "dma_set_coherent_mask: %d\n", ret);  in omap_rproc_probe()
199 	rproc = rproc_alloc(&pdev->dev, pdata->name, &omap_rproc_ops,  in omap_rproc_probe()
200 			    pdata->firmware, sizeof(*oproc));  in omap_rproc_probe()
202 		return -ENOMEM;  in omap_rproc_probe()
204 	oproc = rproc->priv;  in omap_rproc_probe()
205 	oproc->rproc = rproc;  in omap_rproc_probe()
206 	/* All existing OMAP IPU and DSP processors have an MMU */  in omap_rproc_probe()
207 	rproc->has_iommu = true;  in omap_rproc_probe()
236 		.name = "omap-rproc",
243 MODULE_DESCRIPTION("OMAP Remote Processor control driver");