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path: root/drivers/usb/musb/musbhsdma.c
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Diffstat (limited to 'drivers/usb/musb/musbhsdma.c')
-rw-r--r--drivers/usb/musb/musbhsdma.c306
1 files changed, 155 insertions, 151 deletions
diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c
index 9ba8fb7fcd24..8c734ef2c1ed 100644
--- a/drivers/usb/musb/musbhsdma.c
+++ b/drivers/usb/musb/musbhsdma.c
@@ -45,8 +45,8 @@
#define MUSB_HSDMA_ADDRESS 0x8
#define MUSB_HSDMA_COUNT 0xc
-#define MUSB_HSDMA_CHANNEL_OFFSET(_bChannel, _offset) \
- (MUSB_HSDMA_BASE + (_bChannel << 4) + _offset)
+#define MUSB_HSDMA_CHANNEL_OFFSET(_bchannel, _offset) \
+ (MUSB_HSDMA_BASE + (_bchannel << 4) + _offset)
/* control register (16-bit): */
#define MUSB_HSDMA_ENABLE_SHIFT 0
@@ -67,23 +67,23 @@
struct musb_dma_controller;
struct musb_dma_channel {
- struct dma_channel Channel;
+ struct dma_channel channel;
struct musb_dma_controller *controller;
- u32 dwStartAddress;
+ u32 start_addr;
u32 len;
- u16 wMaxPacketSize;
- u8 bIndex;
+ u16 max_packet_sz;
+ u8 idx;
u8 epnum;
u8 transmit;
};
struct musb_dma_controller {
- struct dma_controller Controller;
- struct musb_dma_channel aChannel[MUSB_HSDMA_CHANNELS];
- void *pDmaPrivate;
- void __iomem *pCoreBase;
- u8 bChannelCount;
- u8 bmUsedChannels;
+ struct dma_controller controller;
+ struct musb_dma_channel channel[MUSB_HSDMA_CHANNELS];
+ void *private_data;
+ void __iomem *base;
+ u8 channel_count;
+ u8 used_channels;
u8 irq;
};
@@ -93,91 +93,91 @@ static int dma_controller_start(struct dma_controller *c)
return 0;
}
-static void dma_channel_release(struct dma_channel *pChannel);
+static void dma_channel_release(struct dma_channel *channel);
static int dma_controller_stop(struct dma_controller *c)
{
- struct musb_dma_controller *controller =
- container_of(c, struct musb_dma_controller, Controller);
- struct musb *musb = (struct musb *) controller->pDmaPrivate;
- struct dma_channel *pChannel;
- u8 bBit;
+ struct musb_dma_controller *controller = container_of(c,
+ struct musb_dma_controller, controller);
+ struct musb *musb = controller->private_data;
+ struct dma_channel *channel;
+ u8 bit;
- if (controller->bmUsedChannels != 0) {
+ if (controller->used_channels != 0) {
dev_err(musb->controller,
"Stopping DMA controller while channel active\n");
- for (bBit = 0; bBit < MUSB_HSDMA_CHANNELS; bBit++) {
- if (controller->bmUsedChannels & (1 << bBit)) {
- pChannel = &controller->aChannel[bBit].Channel;
- dma_channel_release(pChannel);
+ for (bit = 0; bit < MUSB_HSDMA_CHANNELS; bit++) {
+ if (controller->used_channels & (1 << bit)) {
+ channel = &controller->channel[bit].channel;
+ dma_channel_release(channel);
- if (!controller->bmUsedChannels)
+ if (!controller->used_channels)
break;
}
}
}
+
return 0;
}
static struct dma_channel *dma_channel_allocate(struct dma_controller *c,
struct musb_hw_ep *hw_ep, u8 transmit)
{
- u8 bBit;
- struct dma_channel *pChannel = NULL;
- struct musb_dma_channel *pImplChannel = NULL;
- struct musb_dma_controller *controller =
- container_of(c, struct musb_dma_controller, Controller);
-
- for (bBit = 0; bBit < MUSB_HSDMA_CHANNELS; bBit++) {
- if (!(controller->bmUsedChannels & (1 << bBit))) {
- controller->bmUsedChannels |= (1 << bBit);
- pImplChannel = &(controller->aChannel[bBit]);
- pImplChannel->controller = controller;
- pImplChannel->bIndex = bBit;
- pImplChannel->epnum = hw_ep->epnum;
- pImplChannel->transmit = transmit;
- pChannel = &(pImplChannel->Channel);
- pChannel->private_data = pImplChannel;
- pChannel->status = MUSB_DMA_STATUS_FREE;
- pChannel->max_len = 0x10000;
+ struct musb_dma_controller *controller = container_of(c,
+ struct musb_dma_controller, controller);
+ struct musb_dma_channel *musb_channel = NULL;
+ struct dma_channel *channel = NULL;
+ u8 bit;
+
+ for (bit = 0; bit < MUSB_HSDMA_CHANNELS; bit++) {
+ if (!(controller->used_channels & (1 << bit))) {
+ controller->used_channels |= (1 << bit);
+ musb_channel = &(controller->channel[bit]);
+ musb_channel->controller = controller;
+ musb_channel->idx = bit;
+ musb_channel->epnum = hw_ep->epnum;
+ musb_channel->transmit = transmit;
+ channel = &(musb_channel->channel);
+ channel->private_data = musb_channel;
+ channel->status = MUSB_DMA_STATUS_FREE;
+ channel->max_len = 0x10000;
/* Tx => mode 1; Rx => mode 0 */
- pChannel->desired_mode = transmit;
- pChannel->actual_len = 0;
+ channel->desired_mode = transmit;
+ channel->actual_len = 0;
break;
}
}
- return pChannel;
+
+ return channel;
}
-static void dma_channel_release(struct dma_channel *pChannel)
+static void dma_channel_release(struct dma_channel *channel)
{
- struct musb_dma_channel *pImplChannel =
- (struct musb_dma_channel *) pChannel->private_data;
+ struct musb_dma_channel *musb_channel = channel->private_data;
- pChannel->actual_len = 0;
- pImplChannel->dwStartAddress = 0;
- pImplChannel->len = 0;
+ channel->actual_len = 0;
+ musb_channel->start_addr = 0;
+ musb_channel->len = 0;
- pImplChannel->controller->bmUsedChannels &=
- ~(1 << pImplChannel->bIndex);
+ musb_channel->controller->used_channels &=
+ ~(1 << musb_channel->idx);
- pChannel->status = MUSB_DMA_STATUS_UNKNOWN;
+ channel->status = MUSB_DMA_STATUS_UNKNOWN;
}
-static void configure_channel(struct dma_channel *pChannel,
+static void configure_channel(struct dma_channel *channel,
u16 packet_sz, u8 mode,
dma_addr_t dma_addr, u32 len)
{
- struct musb_dma_channel *pImplChannel =
- (struct musb_dma_channel *) pChannel->private_data;
- struct musb_dma_controller *controller = pImplChannel->controller;
- void __iomem *mbase = controller->pCoreBase;
- u8 bChannel = pImplChannel->bIndex;
+ struct musb_dma_channel *musb_channel = channel->private_data;
+ struct musb_dma_controller *controller = musb_channel->controller;
+ void __iomem *mbase = controller->base;
+ u8 bchannel = musb_channel->idx;
u16 csr = 0;
DBG(4, "%p, pkt_sz %d, addr 0x%x, len %d, mode %d\n",
- pChannel, packet_sz, dma_addr, len, mode);
+ channel, packet_sz, dma_addr, len, mode);
if (mode) {
csr |= 1 << MUSB_HSDMA_MODE1_SHIFT;
@@ -195,180 +195,183 @@ static void configure_channel(struct dma_channel *pChannel,
}
}
- csr |= (pImplChannel->epnum << MUSB_HSDMA_ENDPOINT_SHIFT)
+ csr |= (musb_channel->epnum << MUSB_HSDMA_ENDPOINT_SHIFT)
| (1 << MUSB_HSDMA_ENABLE_SHIFT)
| (1 << MUSB_HSDMA_IRQENABLE_SHIFT)
- | (pImplChannel->transmit
+ | (musb_channel->transmit
? (1 << MUSB_HSDMA_TRANSMIT_SHIFT)
: 0);
/* address/count */
musb_writel(mbase,
- MUSB_HSDMA_CHANNEL_OFFSET(bChannel, MUSB_HSDMA_ADDRESS),
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS),
dma_addr);
musb_writel(mbase,
- MUSB_HSDMA_CHANNEL_OFFSET(bChannel, MUSB_HSDMA_COUNT),
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT),
len);
/* control (this should start things) */
musb_writew(mbase,
- MUSB_HSDMA_CHANNEL_OFFSET(bChannel, MUSB_HSDMA_CONTROL),
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_CONTROL),
csr);
}
-static int dma_channel_program(struct dma_channel *pChannel,
+static int dma_channel_program(struct dma_channel *channel,
u16 packet_sz, u8 mode,
dma_addr_t dma_addr, u32 len)
{
- struct musb_dma_channel *pImplChannel =
- (struct musb_dma_channel *) pChannel->private_data;
+ struct musb_dma_channel *musb_channel = channel->private_data;
DBG(2, "ep%d-%s pkt_sz %d, dma_addr 0x%x length %d, mode %d\n",
- pImplChannel->epnum,
- pImplChannel->transmit ? "Tx" : "Rx",
+ musb_channel->epnum,
+ musb_channel->transmit ? "Tx" : "Rx",
packet_sz, dma_addr, len, mode);
- BUG_ON(pChannel->status == MUSB_DMA_STATUS_UNKNOWN ||
- pChannel->status == MUSB_DMA_STATUS_BUSY);
+ BUG_ON(channel->status == MUSB_DMA_STATUS_UNKNOWN ||
+ channel->status == MUSB_DMA_STATUS_BUSY);
- pChannel->actual_len = 0;
- pImplChannel->dwStartAddress = dma_addr;
- pImplChannel->len = len;
- pImplChannel->wMaxPacketSize = packet_sz;
- pChannel->status = MUSB_DMA_STATUS_BUSY;
+ channel->actual_len = 0;
+ musb_channel->start_addr = dma_addr;
+ musb_channel->len = len;
+ musb_channel->max_packet_sz = packet_sz;
+ channel->status = MUSB_DMA_STATUS_BUSY;
if ((mode == 1) && (len >= packet_sz))
- configure_channel(pChannel, packet_sz, 1, dma_addr, len);
+ configure_channel(channel, packet_sz, 1, dma_addr, len);
else
- configure_channel(pChannel, packet_sz, 0, dma_addr, len);
+ configure_channel(channel, packet_sz, 0, dma_addr, len);
return true;
}
-static int dma_channel_abort(struct dma_channel *pChannel)
+static int dma_channel_abort(struct dma_channel *channel)
{
- struct musb_dma_channel *pImplChannel =
- (struct musb_dma_channel *) pChannel->private_data;
- u8 bChannel = pImplChannel->bIndex;
- void __iomem *mbase = pImplChannel->controller->pCoreBase;
+ struct musb_dma_channel *musb_channel = channel->private_data;
+ void __iomem *mbase = musb_channel->controller->base;
+
+ u8 bchannel = musb_channel->idx;
u16 csr;
- if (pChannel->status == MUSB_DMA_STATUS_BUSY) {
- if (pImplChannel->transmit) {
+ if (channel->status == MUSB_DMA_STATUS_BUSY) {
+ if (musb_channel->transmit) {
csr = musb_readw(mbase,
- MUSB_EP_OFFSET(pImplChannel->epnum,
+ MUSB_EP_OFFSET(musb_channel->epnum,
MUSB_TXCSR));
csr &= ~(MUSB_TXCSR_AUTOSET |
MUSB_TXCSR_DMAENAB |
MUSB_TXCSR_DMAMODE);
musb_writew(mbase,
- MUSB_EP_OFFSET(pImplChannel->epnum,
- MUSB_TXCSR),
+ MUSB_EP_OFFSET(musb_channel->epnum, MUSB_TXCSR),
csr);
} else {
csr = musb_readw(mbase,
- MUSB_EP_OFFSET(pImplChannel->epnum,
+ MUSB_EP_OFFSET(musb_channel->epnum,
MUSB_RXCSR));
csr &= ~(MUSB_RXCSR_AUTOCLEAR |
MUSB_RXCSR_DMAENAB |
MUSB_RXCSR_DMAMODE);
musb_writew(mbase,
- MUSB_EP_OFFSET(pImplChannel->epnum,
- MUSB_RXCSR),
+ MUSB_EP_OFFSET(musb_channel->epnum, MUSB_RXCSR),
csr);
}
musb_writew(mbase,
- MUSB_HSDMA_CHANNEL_OFFSET(bChannel, MUSB_HSDMA_CONTROL),
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_CONTROL),
0);
musb_writel(mbase,
- MUSB_HSDMA_CHANNEL_OFFSET(bChannel, MUSB_HSDMA_ADDRESS),
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_ADDRESS),
0);
musb_writel(mbase,
- MUSB_HSDMA_CHANNEL_OFFSET(bChannel, MUSB_HSDMA_COUNT),
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_COUNT),
0);
- pChannel->status = MUSB_DMA_STATUS_FREE;
+ channel->status = MUSB_DMA_STATUS_FREE;
}
+
return 0;
}
static irqreturn_t dma_controller_irq(int irq, void *private_data)
{
- struct musb_dma_controller *controller =
- (struct musb_dma_controller *)private_data;
- struct musb_dma_channel *pImplChannel;
- struct musb *musb = controller->pDmaPrivate;
- void __iomem *mbase = controller->pCoreBase;
- struct dma_channel *pChannel;
- u8 bChannel;
- u16 csr;
- u32 dwAddress;
- u8 int_hsdma;
+ struct musb_dma_controller *controller = private_data;
+ struct musb *musb = controller->private_data;
+ struct musb_dma_channel *musb_channel;
+ struct dma_channel *channel;
+
+ void __iomem *mbase = controller->base;
+
irqreturn_t retval = IRQ_NONE;
+
unsigned long flags;
+ u8 bchannel;
+ u8 int_hsdma;
+
+ u32 addr;
+ u16 csr;
+
spin_lock_irqsave(&musb->lock, flags);
int_hsdma = musb_readb(mbase, MUSB_HSDMA_INTR);
if (!int_hsdma)
goto done;
- for (bChannel = 0; bChannel < MUSB_HSDMA_CHANNELS; bChannel++) {
- if (int_hsdma & (1 << bChannel)) {
- pImplChannel = (struct musb_dma_channel *)
- &(controller->aChannel[bChannel]);
- pChannel = &pImplChannel->Channel;
+ for (bchannel = 0; bchannel < MUSB_HSDMA_CHANNELS; bchannel++) {
+ if (int_hsdma & (1 << bchannel)) {
+ musb_channel = (struct musb_dma_channel *)
+ &(controller->channel[bchannel]);
+ channel = &musb_channel->channel;
csr = musb_readw(mbase,
- MUSB_HSDMA_CHANNEL_OFFSET(bChannel,
+ MUSB_HSDMA_CHANNEL_OFFSET(bchannel,
MUSB_HSDMA_CONTROL));
- if (csr & (1 << MUSB_HSDMA_BUSERROR_SHIFT))
- pImplChannel->Channel.status =
+ if (csr & (1 << MUSB_HSDMA_BUSERROR_SHIFT)) {
+ musb_channel->channel.status =
MUSB_DMA_STATUS_BUS_ABORT;
- else {
+ } else {
u8 devctl;
- dwAddress = musb_readl(mbase,
+ addr = musb_readl(mbase,
MUSB_HSDMA_CHANNEL_OFFSET(
- bChannel,
+ bchannel,
MUSB_HSDMA_ADDRESS));
- pChannel->actual_len = dwAddress
- - pImplChannel->dwStartAddress;
+ channel->actual_len = addr
+ - musb_channel->start_addr;
DBG(2, "ch %p, 0x%x -> 0x%x (%d / %d) %s\n",
- pChannel, pImplChannel->dwStartAddress,
- dwAddress, pChannel->actual_len,
- pImplChannel->len,
- (pChannel->actual_len
- < pImplChannel->len) ?
+ channel, musb_channel->start_addr,
+ addr, channel->actual_len,
+ musb_channel->len,
+ (channel->actual_len
+ < musb_channel->len) ?
"=> reconfig 0" : "=> complete");
devctl = musb_readb(mbase, MUSB_DEVCTL);
- pChannel->status = MUSB_DMA_STATUS_FREE;
+ channel->status = MUSB_DMA_STATUS_FREE;
/* completed */
if ((devctl & MUSB_DEVCTL_HM)
- && (pImplChannel->transmit)
- && ((pChannel->desired_mode == 0)
- || (pChannel->actual_len &
- (pImplChannel->wMaxPacketSize - 1)))
+ && (musb_channel->transmit)
+ && ((channel->desired_mode == 0)
+ || (channel->actual_len &
+ (musb_channel->max_packet_sz - 1)))
) {
/* Send out the packet */
musb_ep_select(mbase,
- pImplChannel->epnum);
+ musb_channel->epnum);
musb_writew(mbase, MUSB_EP_OFFSET(
- pImplChannel->epnum,
+ musb_channel->epnum,
MUSB_TXCSR),
MUSB_TXCSR_TXPKTRDY);
- } else
+ } else {
musb_dma_completion(
musb,
- pImplChannel->epnum,
- pImplChannel->transmit);
+ musb_channel->epnum,
+ musb_channel->transmit);
+ }
}
}
}
@@ -380,9 +383,9 @@ done:
void dma_controller_destroy(struct dma_controller *c)
{
- struct musb_dma_controller *controller;
+ struct musb_dma_controller *controller = container_of(c,
+ struct musb_dma_controller, controller);
- controller = container_of(c, struct musb_dma_controller, Controller);
if (!controller)
return;
@@ -393,7 +396,7 @@ void dma_controller_destroy(struct dma_controller *c)
}
struct dma_controller *__init
-dma_controller_create(struct musb *musb, void __iomem *pCoreBase)
+dma_controller_create(struct musb *musb, void __iomem *base)
{
struct musb_dma_controller *controller;
struct device *dev = musb->controller;
@@ -405,29 +408,30 @@ dma_controller_create(struct musb *musb, void __iomem *pCoreBase)
return NULL;
}
- controller = kzalloc(sizeof(struct musb_dma_controller), GFP_KERNEL);
+ controller = kzalloc(sizeof(*controller), GFP_KERNEL);
if (!controller)
return NULL;
- controller->bChannelCount = MUSB_HSDMA_CHANNELS;
- controller->pDmaPrivate = musb;
- controller->pCoreBase = pCoreBase;
+ controller->channel_count = MUSB_HSDMA_CHANNELS;
+ controller->private_data = musb;
+ controller->base = base;
- controller->Controller.start = dma_controller_start;
- controller->Controller.stop = dma_controller_stop;
- controller->Controller.channel_alloc = dma_channel_allocate;
- controller->Controller.channel_release = dma_channel_release;
- controller->Controller.channel_program = dma_channel_program;
- controller->Controller.channel_abort = dma_channel_abort;
+ controller->controller.start = dma_controller_start;
+ controller->controller.stop = dma_controller_stop;
+ controller->controller.channel_alloc = dma_channel_allocate;
+ controller->controller.channel_release = dma_channel_release;
+ controller->controller.channel_program = dma_channel_program;
+ controller->controller.channel_abort = dma_channel_abort;
if (request_irq(irq, dma_controller_irq, IRQF_DISABLED,
- musb->controller->bus_id, &controller->Controller)) {
+ musb->controller->bus_id, &controller->controller)) {
dev_err(dev, "request_irq %d failed!\n", irq);
- dma_controller_destroy(&controller->Controller);
+ dma_controller_destroy(&controller->controller);
+
return NULL;
}
controller->irq = irq;
- return &controller->Controller;
+ return &controller->controller;
}