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usb: musb: musb_cppi41: Fix cppi41_set_dma_mode() for DA8xx 

The way to configure the DMA mode on DA8xx is different from DSPS.
Add a new function to configure DMA mode on DA8xx and use a callback
to call the right function based on the platform.

Cc: stable@vger.kernel.org  # v4.12+
Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
Tested-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexandre Bailon 2017-10-09 22:46:10 -05:00 committed by Greg Kroah-Hartman
parent bfa53e0e36
commit e10c5b0c77
1 changed files with 37 additions and 3 deletions
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40
drivers/usb/musb/musb_cppi41.c
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@ -26,6 +26,7 @@
#define MUSB_DMA_NUM_CHANNELS 15
#define DA8XX_USB_MODE 0x10
#define DA8XX_USB_AUTOREQ 0x14
#define DA8XX_USB_TEARDOWN 0x1c
@ -41,6 +42,9 @@ struct cppi41_dma_controller {
u32 tdown_reg;
u32 autoreq_reg;
void (*set_dma_mode)(struct cppi41_dma_channel *cppi41_channel,
unsigned int mode);
};
static void save_rx_toggle(struct cppi41_dma_channel *cppi41_channel)
@ -355,6 +359,32 @@ static void cppi41_set_dma_mode(struct cppi41_dma_channel *cppi41_channel,
}
}
static void da8xx_set_dma_mode(struct cppi41_dma_channel *cppi41_channel,
unsigned int mode)
{
struct cppi41_dma_controller *controller = cppi41_channel->controller;
struct musb *musb = controller->controller.musb;
unsigned int shift;
u32 port;
u32 new_mode;
u32 old_mode;
old_mode = controller->tx_mode;
port = cppi41_channel->port_num;
shift = (port - 1) * 4;
if (!cppi41_channel->is_tx)
shift += 16;
new_mode = old_mode & ~(3 << shift);
new_mode |= mode << shift;
if (new_mode == old_mode)
return;
controller->tx_mode = new_mode;
musb_writel(musb->ctrl_base, DA8XX_USB_MODE, new_mode);
}
static void cppi41_set_autoreq_mode(struct cppi41_dma_channel *cppi41_channel,
unsigned mode)
{
@ -379,6 +409,7 @@ static bool cppi41_configure_channel(struct dma_channel *channel,
dma_addr_t dma_addr, u32 len)
{
struct cppi41_dma_channel *cppi41_channel = channel->private_data;
struct cppi41_dma_controller *controller = cppi41_channel->controller;
struct dma_chan *dc = cppi41_channel->dc;
struct dma_async_tx_descriptor *dma_desc;
enum dma_transfer_direction direction;
@ -404,7 +435,7 @@ static bool cppi41_configure_channel(struct dma_channel *channel,
musb_writel(musb->ctrl_base,
RNDIS_REG(cppi41_channel->port_num), len);
/* gen rndis */
cppi41_set_dma_mode(cppi41_channel,
controller->set_dma_mode(cppi41_channel,
EP_MODE_DMA_GEN_RNDIS);
/* auto req */
@ -413,14 +444,15 @@ static bool cppi41_configure_channel(struct dma_channel *channel,
} else {
musb_writel(musb->ctrl_base,
RNDIS_REG(cppi41_channel->port_num), 0);
cppi41_set_dma_mode(cppi41_channel,
controller->set_dma_mode(cppi41_channel,
EP_MODE_DMA_TRANSPARENT);
cppi41_set_autoreq_mode(cppi41_channel,
EP_MODE_AUTOREQ_NONE);
}
} else {
/* fallback mode */
cppi41_set_dma_mode(cppi41_channel, EP_MODE_DMA_TRANSPARENT);
controller->set_dma_mode(cppi41_channel,
EP_MODE_DMA_TRANSPARENT);
cppi41_set_autoreq_mode(cppi41_channel, EP_MODE_AUTOREQ_NONE);
len = min_t(u32, packet_sz, len);
}
@ -737,9 +769,11 @@ cppi41_dma_controller_create(struct musb *musb, void __iomem *base)
if (musb->io.quirks & MUSB_DA8XX) {
controller->tdown_reg = DA8XX_USB_TEARDOWN;
controller->autoreq_reg = DA8XX_USB_AUTOREQ;
controller->set_dma_mode = da8xx_set_dma_mode;
} else {
controller->tdown_reg = USB_TDOWN;
controller->autoreq_reg = USB_CTRL_AUTOREQ;
controller->set_dma_mode = cppi41_set_dma_mode;
}
ret = cppi41_dma_controller_start(controller);