diff options
Diffstat (limited to 'drivers/modem/m6718_spi/protocol.c')
| -rw-r--r-- | drivers/modem/m6718_spi/protocol.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/modem/m6718_spi/protocol.c b/drivers/modem/m6718_spi/protocol.c index 5f03167d024..6879d58798b 100644 --- a/drivers/modem/m6718_spi/protocol.c +++ b/drivers/modem/m6718_spi/protocol.c @@ -10,6 +10,7 @@ #include <linux/modem/m6718_spi/modem_driver.h> #include "modem_protocol.h" #include "modem_private.h" +#include "modem_util.h" #ifdef CONFIG_MODEM_M6718_SPI_ENABLE_FEATURE_MODEM_STATE #include <linux/workqueue.h> @@ -177,16 +178,53 @@ bool modem_protocol_is_busy(struct spi_device *sdev) return false; } +static void spi_tfr_complete(void *context) +{ + /* TODO: statemachine will be kicked here */ +} + +static irqreturn_t slave_ready_irq(int irq, void *dev) +{ + struct ipc_link_context *context = (struct ipc_link_context *)dev; + struct modem_m6718_spi_link_platform_data *link = context->link; + struct spi_device *sdev = context->sdev; + + if (irq != GPIO_TO_IRQ(link->gpio.int_pin)) { + dev_err(&sdev->dev, + "link %d error: spurious slave irq!", link->id); + return IRQ_NONE; + } + +#ifdef WORKAROUND_DUPLICATED_IRQ + if (link->id != IPC_LINK_AUDIO && pl022_tfr_in_progress(sdev)) { + dev_warn(&sdev->dev, + "link %d warning: slave irq while transfer " + "is active! discarding event\n", link->id); + return IRQ_HANDLED; + } +#endif + /* TODO: statemachine will be kicked here */ + return IRQ_HANDLED; +} + #ifdef CONFIG_MODEM_M6718_SPI_ENABLE_FEATURE_MODEM_STATE static int modem_state_callback(unsigned long unused) { int modem_state = modem_state_get_state(); + struct ipc_link_context *contexts = l1_context.device_context; + u8 i; pr_info("M6718 IPC protocol modemstate reports modem is %s\n", modem_state_to_str(modem_state)); switch (modem_state) { case MODEM_STATE_ON: + /* + * Modem is on, ensure each link is configured and trigger + * a state change on link0 to begin handshake. + */ + for (i = 0; i < IPC_NBR_SUPPORTED_SPI_LINKS; i++) + ipc_util_link_gpio_config(&contexts[i]); /* TODO: statemachine will be kicked here */ break; case MODEM_STATE_OFF: @@ -248,7 +286,10 @@ int modem_protocol_probe(struct spi_device *sdev) context->link = link; context->sdev = sdev; atomic_set(&context->gpio_configured, 0); + atomic_set(&context->state_int, + ipc_util_int_level_inactive(context)); spin_lock_init(&context->sm_lock); + ipc_util_spi_message_init(context, spi_tfr_complete); init_timer(&context->comms_timer); context->comms_timer.function = modem_comms_timeout; context->comms_timer.data = (unsigned long)context; @@ -256,6 +297,11 @@ int modem_protocol_probe(struct spi_device *sdev) context->slave_stable_timer.function = slave_stable_timeout; context->slave_stable_timer.data = (unsigned long)context; + if (!ipc_util_link_gpio_request(context, slave_ready_irq)) + return -ENODEV; + if (!ipc_util_link_gpio_config(context)) + return -ENODEV; + #ifdef CONFIG_MODEM_M6718_SPI_ENABLE_FEATURE_VERIFY_FRAMES context->last_frame = NULL; #endif @@ -283,5 +329,9 @@ int modem_protocol_probe(struct spi_device *sdev) void modem_protocol_exit(void) { + int i; + pr_info("M6718 IPC protocol exit\n"); + for (i = 0; i < IPC_NBR_SUPPORTED_SPI_LINKS; i++) + ipc_util_link_gpio_unconfig(&l1_context.device_context[i]); } |