static int altera_mbox_probe(struct platform_device *pdev)
{
struct altera_mbox *mbox;
struct resource *regs;
struct mbox_chan *chans;
int ret;
mbox = devm_kzalloc(&pdev->dev, sizeof(*mbox),
GFP_KERNEL);
if (!mbox)
return -ENOMEM;
/* Allocated one channel */
chans = devm_kzalloc(&pdev->dev, sizeof(*chans), GFP_KERNEL);
if (!chans)
return -ENOMEM;
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mbox->mbox_base = devm_ioremap_resource(&pdev->dev, regs);
if (IS_ERR(mbox->mbox_base))
return PTR_ERR(mbox->mbox_base);
/* Check is it a sender or receiver? */
mbox->is_sender = altera_mbox_is_sender(mbox);
mbox->irq = platform_get_irq(pdev, 0);
if (mbox->irq >= 0)
mbox->intr_mode = true;
mbox->dev = &pdev->dev;
/* Hardware supports only one channel. */
chans[0].con_priv = mbox;
mbox->controller.dev = mbox->dev;
mbox->controller.num_chans = 1;
mbox->controller.chans = chans;
mbox->controller.ops = &altera_mbox_ops;
if (mbox->is_sender) {
if (mbox->intr_mode) {
mbox->controller.txdone_irq = true;
} else {
mbox->controller.txdone_poll = true;
mbox->controller.txpoll_period = MBOX_POLLING_MS;
}
}
ret = mbox_controller_register(&mbox->controller);
if (ret) {
dev_err(&pdev->dev, "Register mailbox failed\n");
goto err;
}
platform_set_drvdata(pdev, mbox);
err:
return ret;
}
static int slimpro_mbox_probe(struct platform_device *pdev)
{
struct slimpro_mbox *ctx;
struct resource *regs;
void __iomem *mb_base;
int rc;
int i;
ctx = devm_kzalloc(&pdev->dev, sizeof(struct slimpro_mbox), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
platform_set_drvdata(pdev, ctx);
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mb_base = devm_ioremap(&pdev->dev, regs->start, resource_size(regs));
if (!mb_base)
return -ENOMEM;
/* Setup mailbox links */
for (i = 0; i < MBOX_CNT; i++) {
ctx->mc[i].irq = platform_get_irq(pdev, i);
if (ctx->mc[i].irq < 0) {
if (i == 0) {
dev_err(&pdev->dev, "no available IRQ\n");
return -EINVAL;
}
dev_info(&pdev->dev, "no IRQ for channel %d\n", i);
break;
}
ctx->mc[i].dev = &pdev->dev;
ctx->mc[i].reg = mb_base + i * MBOX_REG_SET_OFFSET;
ctx->mc[i].chan = &ctx->chans[i];
ctx->chans[i].con_priv = &ctx->mc[i];
}
/* Setup mailbox controller */
ctx->mb_ctrl.dev = &pdev->dev;
ctx->mb_ctrl.chans = ctx->chans;
ctx->mb_ctrl.txdone_irq = true;
ctx->mb_ctrl.ops = &slimpro_mbox_ops;
ctx->mb_ctrl.num_chans = i;
rc = mbox_controller_register(&ctx->mb_ctrl);
if (rc) {
dev_err(&pdev->dev,
"APM X-Gene SLIMpro MailBox register failed:%d\n", rc);
return rc;
}
dev_info(&pdev->dev, "APM X-Gene SLIMpro MailBox registered\n");
return 0;
}
/**
* pcc_mbox_probe - Called when we find a match for the
* PCCT platform device. This is purely used to represent
* the PCCT as a virtual device for registering with the
* generic Mailbox framework.
*
* @pdev: Pointer to platform device returned when a match
* is found.
*
* Return: 0 for Success, else errno.
*/
static int pcc_mbox_probe(struct platform_device *pdev)
{
int ret = 0;
pcc_mbox_ctrl.chans = pcc_mbox_channels;
pcc_mbox_ctrl.ops = &pcc_chan_ops;
pcc_mbox_ctrl.dev = &pdev->dev;
pr_info("Registering PCC driver as Mailbox controller\n");
ret = mbox_controller_register(&pcc_mbox_ctrl);
if (ret) {
pr_err("Err registering PCC as Mailbox controller: %d\n", ret);
ret = -ENODEV;
}
return ret;
}
static int sti_mbox_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
struct mbox_controller *mbox;
struct sti_mbox_device *mdev;
struct device_node *np = pdev->dev.of_node;
struct mbox_chan *chans;
struct resource *res;
int irq;
int ret;
match = of_match_device(sti_mailbox_match, &pdev->dev);
if (!match) {
dev_err(&pdev->dev, "No configuration found\n");
return -ENODEV;
}
pdev->dev.platform_data = (struct sti_mbox_pdata *) match->data;
mdev = devm_kzalloc(&pdev->dev, sizeof(*mdev), GFP_KERNEL);
if (!mdev)
return -ENOMEM;
platform_set_drvdata(pdev, mdev);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mdev->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(mdev->base))
return PTR_ERR(mdev->base);
ret = of_property_read_string(np, "mbox-name", &mdev->name);
if (ret)
mdev->name = np->full_name;
mbox = devm_kzalloc(&pdev->dev, sizeof(*mbox), GFP_KERNEL);
if (!mbox)
return -ENOMEM;
chans = devm_kzalloc(&pdev->dev,
sizeof(*chans) * STI_MBOX_CHAN_MAX, GFP_KERNEL);
if (!chans)
return -ENOMEM;
mdev->dev = &pdev->dev;
mdev->mbox = mbox;
spin_lock_init(&mdev->lock);
/* STi Mailbox does not have a Tx-Done or Tx-Ready IRQ */
mbox->txdone_irq = false;
mbox->txdone_poll = true;
mbox->txpoll_period = 100;
mbox->ops = &sti_mbox_ops;
mbox->dev = mdev->dev;
mbox->of_xlate = sti_mbox_xlate;
mbox->chans = chans;
mbox->num_chans = STI_MBOX_CHAN_MAX;
ret = mbox_controller_register(mbox);
if (ret)
return ret;
/* It's okay for Tx Mailboxes to not supply IRQs */
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_info(&pdev->dev,
"%s: Registered Tx only Mailbox\n", mdev->name);
return 0;
}
ret = devm_request_threaded_irq(&pdev->dev, irq,
sti_mbox_irq_handler,
sti_mbox_thread_handler,
IRQF_ONESHOT, mdev->name, mdev);
if (ret) {
dev_err(&pdev->dev, "Can't claim IRQ %d\n", irq);
mbox_controller_unregister(mbox);
return -EINVAL;
}
dev_info(&pdev->dev, "%s: Registered Tx/Rx Mailbox\n", mdev->name);
return 0;
}
static int stm32_ipcc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct stm32_ipcc *ipcc;
struct resource *res;
unsigned int i;
int ret;
u32 ip_ver;
static const char * const irq_name[] = {"rx", "tx"};
irq_handler_t irq_thread[] = {stm32_ipcc_rx_irq, stm32_ipcc_tx_irq};
if (!np) {
dev_err(dev, "No DT found\n");
return -ENODEV;
}
ipcc = devm_kzalloc(dev, sizeof(*ipcc), GFP_KERNEL);
if (!ipcc)
return -ENOMEM;
/* proc_id */
if (of_property_read_u32(np, "st,proc-id", &ipcc->proc_id)) {
dev_err(dev, "Missing st,proc-id\n");
return -ENODEV;
}
if (ipcc->proc_id >= STM32_MAX_PROCS) {
dev_err(dev, "Invalid proc_id (%d)\n", ipcc->proc_id);
return -EINVAL;
}
/* regs */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ipcc->reg_base = devm_ioremap_resource(dev, res);
if (IS_ERR(ipcc->reg_base))
return PTR_ERR(ipcc->reg_base);
ipcc->reg_proc = ipcc->reg_base + ipcc->proc_id * IPCC_PROC_OFFST;
/* clock */
ipcc->clk = devm_clk_get(dev, NULL);
if (IS_ERR(ipcc->clk))
return PTR_ERR(ipcc->clk);
ret = clk_prepare_enable(ipcc->clk);
if (ret) {
dev_err(dev, "can not enable the clock\n");
return ret;
}
/* irq */
for (i = 0; i < IPCC_IRQ_NUM; i++) {
ipcc->irqs[i] = of_irq_get_byname(dev->of_node, irq_name[i]);
if (ipcc->irqs[i] < 0) {
dev_err(dev, "no IRQ specified %s\n", irq_name[i]);
ret = ipcc->irqs[i];
goto err_clk;
}
ret = devm_request_threaded_irq(dev, ipcc->irqs[i], NULL,
irq_thread[i], IRQF_ONESHOT,
dev_name(dev), ipcc);
if (ret) {
dev_err(dev, "failed to request irq %d (%d)\n", i, ret);
goto err_clk;
}
}
/* mask and enable rx/tx irq */
stm32_ipcc_set_bits(ipcc->reg_proc + IPCC_XMR,
RX_BIT_MASK | TX_BIT_MASK);
stm32_ipcc_set_bits(ipcc->reg_proc + IPCC_XCR, XCR_RXOIE | XCR_TXOIE);
/* wakeup */
if (of_property_read_bool(np, "wakeup-source")) {
ipcc->wkp = of_irq_get_byname(dev->of_node, "wakeup");
if (ipcc->wkp < 0) {
dev_err(dev, "could not get wakeup IRQ\n");
ret = ipcc->wkp;
goto err_clk;
}
device_init_wakeup(dev, true);
ret = dev_pm_set_dedicated_wake_irq(dev, ipcc->wkp);
if (ret) {
dev_err(dev, "Failed to set wake up irq\n");
goto err_init_wkp;
}
} else {
device_init_wakeup(dev, false);
}
/* mailbox controller */
ipcc->n_chans = readl_relaxed(ipcc->reg_base + IPCC_HWCFGR);
ipcc->n_chans &= IPCFGR_CHAN_MASK;
ipcc->controller.dev = dev;
ipcc->controller.txdone_irq = true;
ipcc->controller.ops = &stm32_ipcc_ops;
ipcc->controller.num_chans = ipcc->n_chans;
ipcc->controller.chans = devm_kcalloc(dev, ipcc->controller.num_chans,
sizeof(*ipcc->controller.chans),
GFP_KERNEL);
if (!ipcc->controller.chans) {
ret = -ENOMEM;
goto err_irq_wkp;
}
for (i = 0; i < ipcc->controller.num_chans; i++)
ipcc->controller.chans[i].con_priv = (void *)i;
ret = mbox_controller_register(&ipcc->controller);
if (ret)
goto err_irq_wkp;
platform_set_drvdata(pdev, ipcc);
ip_ver = readl_relaxed(ipcc->reg_base + IPCC_VER);
dev_info(dev, "ipcc rev:%ld.%ld enabled, %d chans, proc %d\n",
FIELD_GET(VER_MAJREV_MASK, ip_ver),
FIELD_GET(VER_MINREV_MASK, ip_ver),
ipcc->controller.num_chans, ipcc->proc_id);
clk_disable_unprepare(ipcc->clk);
return 0;
err_irq_wkp:
if (ipcc->wkp)
dev_pm_clear_wake_irq(dev);
err_init_wkp:
device_init_wakeup(dev, false);
err_clk:
clk_disable_unprepare(ipcc->clk);
return ret;
}