diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/musb/musb_cppi41.c | 31 |
1 files changed, 26 insertions, 5 deletions
diff --git a/drivers/usb/musb/musb_cppi41.c b/drivers/usb/musb/musb_cppi41.c index b2b1306c01cf..1ec0a4947b6b 100644 --- a/drivers/usb/musb/musb_cppi41.c +++ b/drivers/usb/musb/musb_cppi41.c @@ -30,10 +30,12 @@ #define DA8XX_USB_AUTOREQ 0x14 #define DA8XX_USB_TEARDOWN 0x1c +#define DA8XX_DMA_NUM_CHANNELS 4 + struct cppi41_dma_controller { struct dma_controller controller; - struct cppi41_dma_channel rx_channel[MUSB_DMA_NUM_CHANNELS]; - struct cppi41_dma_channel tx_channel[MUSB_DMA_NUM_CHANNELS]; + struct cppi41_dma_channel *rx_channel; + struct cppi41_dma_channel *tx_channel; struct hrtimer early_tx; struct list_head early_tx_list; u32 rx_mode; @@ -45,6 +47,7 @@ struct cppi41_dma_controller { void (*set_dma_mode)(struct cppi41_dma_channel *cppi41_channel, unsigned int mode); + u8 num_channels; }; static void save_rx_toggle(struct cppi41_dma_channel *cppi41_channel) @@ -483,7 +486,7 @@ static struct dma_channel *cppi41_dma_channel_allocate(struct dma_controller *c, struct cppi41_dma_channel *cppi41_channel = NULL; u8 ch_num = hw_ep->epnum - 1; - if (ch_num >= MUSB_DMA_NUM_CHANNELS) + if (ch_num >= controller->num_channels) return NULL; if (is_tx) @@ -643,7 +646,7 @@ static void cppi41_release_all_dma_chans(struct cppi41_dma_controller *ctrl) struct dma_chan *dc; int i; - for (i = 0; i < MUSB_DMA_NUM_CHANNELS; i++) { + for (i = 0; i < ctrl->num_channels; i++) { dc = ctrl->tx_channel[i].dc; if (dc) dma_release_channel(dc); @@ -695,7 +698,7 @@ static int cppi41_dma_controller_start(struct cppi41_dma_controller *controller) goto err; ret = -EINVAL; - if (port > MUSB_DMA_NUM_CHANNELS || !port) + if (port > controller->num_channels || !port) goto err; if (is_tx) cppi41_channel = &controller->tx_channel[port - 1]; @@ -736,6 +739,8 @@ void cppi41_dma_controller_destroy(struct dma_controller *c) hrtimer_cancel(&controller->early_tx); cppi41_dma_controller_stop(controller); + kfree(controller->rx_channel); + kfree(controller->tx_channel); kfree(controller); } EXPORT_SYMBOL_GPL(cppi41_dma_controller_destroy); @@ -744,6 +749,7 @@ struct dma_controller * cppi41_dma_controller_create(struct musb *musb, void __iomem *base) { struct cppi41_dma_controller *controller; + int channel_size; int ret = 0; if (!musb->controller->parent->of_node) { @@ -770,18 +776,33 @@ cppi41_dma_controller_create(struct musb *musb, void __iomem *base) controller->tdown_reg = DA8XX_USB_TEARDOWN; controller->autoreq_reg = DA8XX_USB_AUTOREQ; controller->set_dma_mode = da8xx_set_dma_mode; + controller->num_channels = DA8XX_DMA_NUM_CHANNELS; } else { controller->tdown_reg = USB_TDOWN; controller->autoreq_reg = USB_CTRL_AUTOREQ; controller->set_dma_mode = cppi41_set_dma_mode; + controller->num_channels = MUSB_DMA_NUM_CHANNELS; } + channel_size = controller->num_channels * + sizeof(struct cppi41_dma_channel); + controller->rx_channel = kzalloc(channel_size, GFP_KERNEL); + if (!controller->rx_channel) + goto rx_channel_alloc_fail; + controller->tx_channel = kzalloc(channel_size, GFP_KERNEL); + if (!controller->tx_channel) + goto tx_channel_alloc_fail; + ret = cppi41_dma_controller_start(controller); if (ret) goto plat_get_fail; return &controller->controller; plat_get_fail: + kfree(controller->tx_channel); +tx_channel_alloc_fail: + kfree(controller->rx_channel); +rx_channel_alloc_fail: kfree(controller); kzalloc_fail: if (ret == -EPROBE_DEFER) |