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staging: octeon-usb: use list.h for pipes

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Use list.h helpers for pipes.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Aaro Koskinen 2013-10-10 23:25:35 +03:00 committed by Greg Kroah-Hartman
parent f011fefa8a
commit 4a23ee1bd7
1 changed files with 24 additions and 81 deletions
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105
drivers/staging/octeon-usb/octeon-hcd.c
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@ -345,7 +345,7 @@ struct cvmx_usb_transaction {
* and some USB device. It contains a list of pending
* request to the device.
*
* @prev: Pipe before this one in the list
* @node: List node for pipe list
* @next: Pipe after this one in the list
* @head: The first pending transaction
* @tail: The last pending transaction
@ -369,8 +369,7 @@ struct cvmx_usb_transaction {
* complete should be sent on
*/
struct cvmx_usb_pipe {
struct cvmx_usb_pipe *prev;
struct cvmx_usb_pipe *next;
struct list_head node;
struct cvmx_usb_transaction *head;
struct cvmx_usb_transaction *tail;
uint64_t interval;
@ -390,17 +389,6 @@ struct cvmx_usb_pipe {
int8_t split_sc_frame;
};
/**
* struct cvmx_usb_pipe_list
*
* @head: Head of the list, or NULL if empty.
* @tail: Tail if the list, or NULL if empty.
*/
struct cvmx_usb_pipe_list {
struct cvmx_usb_pipe *head;
struct cvmx_usb_pipe *tail;
};
struct cvmx_usb_tx_fifo {
struct {
int channel;
@ -436,8 +424,8 @@ struct cvmx_usb_state {
struct cvmx_usb_pipe *pipe_for_channel[MAX_CHANNELS];
int indent;
struct cvmx_usb_port_status port_status;
struct cvmx_usb_pipe_list idle_pipes;
struct cvmx_usb_pipe_list active_pipes[4];
struct list_head idle_pipes;
struct list_head active_pipes[4];
uint64_t frame_number;
struct cvmx_usb_transaction *active_split;
struct cvmx_usb_tx_fifo periodic;
@ -629,50 +617,6 @@ static int cvmx_usb_get_num_ports(void)
return arch_ports;
}
/**
* Add a pipe to the tail of a list
* @list: List to add pipe to
* @pipe: Pipe to add
*/
static inline void __cvmx_usb_append_pipe(struct cvmx_usb_pipe_list *list, struct cvmx_usb_pipe *pipe)
{
pipe->next = NULL;
pipe->prev = list->tail;
if (list->tail)
list->tail->next = pipe;
else
list->head = pipe;
list->tail = pipe;
}
/**
* Remove a pipe from a list
* @list: List to remove pipe from
* @pipe: Pipe to remove
*/
static inline void __cvmx_usb_remove_pipe(struct cvmx_usb_pipe_list *list, struct cvmx_usb_pipe *pipe)
{
if (list->head == pipe) {
list->head = pipe->next;
pipe->next = NULL;
if (list->head)
list->head->prev = NULL;
else
list->tail = NULL;
} else if (list->tail == pipe) {
list->tail = pipe->prev;
list->tail->next = NULL;
pipe->prev = NULL;
} else {
pipe->prev->next = pipe->next;
pipe->next->prev = pipe->prev;
pipe->prev = NULL;
pipe->next = NULL;
}
}
/**
* Initialize a USB port for use. This must be called before any
* other access to the Octeon USB port is made. The port starts
@ -693,6 +637,7 @@ static int cvmx_usb_initialize(struct cvmx_usb_state *usb,
union cvmx_usbnx_clk_ctl usbn_clk_ctl;
union cvmx_usbnx_usbp_ctl_status usbn_usbp_ctl_status;
enum cvmx_usb_initialize_flags flags = 0;
int i;
/* At first allow 0-1 for the usb port number */
if ((usb_port_number < 0) || (usb_port_number > 1))
@ -728,6 +673,9 @@ static int cvmx_usb_initialize(struct cvmx_usb_state *usb,
/* Initialize the USB state structure */
usb->index = usb_port_number;
INIT_LIST_HEAD(&usb->idle_pipes);
for (i = 0; i < ARRAY_SIZE(usb->active_pipes); i++)
INIT_LIST_HEAD(&usb->active_pipes[i]);
/*
* Power On Reset and PHY Initialization
@ -1003,11 +951,11 @@ static int cvmx_usb_shutdown(struct cvmx_usb_state *usb)
union cvmx_usbnx_clk_ctl usbn_clk_ctl;
/* Make sure all pipes are closed */
if (usb->idle_pipes.head ||
usb->active_pipes[CVMX_USB_TRANSFER_ISOCHRONOUS].head ||
usb->active_pipes[CVMX_USB_TRANSFER_INTERRUPT].head ||
usb->active_pipes[CVMX_USB_TRANSFER_CONTROL].head ||
usb->active_pipes[CVMX_USB_TRANSFER_BULK].head)
if (!list_empty(&usb->idle_pipes) ||
!list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_ISOCHRONOUS]) ||
!list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_INTERRUPT]) ||
!list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_CONTROL]) ||
!list_empty(&usb->active_pipes[CVMX_USB_TRANSFER_BULK]))
return -EBUSY;
/* Disable the clocks and put them in power on reset */
@ -1290,7 +1238,7 @@ static struct cvmx_usb_pipe *cvmx_usb_open_pipe(struct cvmx_usb_state *usb,
pipe->hub_port = hub_port;
pipe->pid_toggle = 0;
pipe->split_sc_frame = -1;
__cvmx_usb_append_pipe(&usb->idle_pipes, pipe);
list_add_tail(&pipe->node, &usb->idle_pipes);
/*
* We don't need to tell the hardware about this pipe yet since
@ -1919,10 +1867,11 @@ static void __cvmx_usb_start_channel(struct cvmx_usb_state *usb,
*
* Returns: Pipe or NULL if none are ready
*/
static struct cvmx_usb_pipe *__cvmx_usb_find_ready_pipe(struct cvmx_usb_state *usb, struct cvmx_usb_pipe_list *list, uint64_t current_frame)
static struct cvmx_usb_pipe *__cvmx_usb_find_ready_pipe(struct cvmx_usb_state *usb, struct list_head *list, uint64_t current_frame)
{
struct cvmx_usb_pipe *pipe = list->head;
while (pipe) {
struct cvmx_usb_pipe *pipe;
list_for_each_entry(pipe, list, node) {
if (!(pipe->flags & __CVMX_USB_PIPE_FLAGS_SCHEDULED) && pipe->head &&
(pipe->next_tx_frame <= current_frame) &&
((pipe->split_sc_frame == -1) || ((((int)current_frame - (int)pipe->split_sc_frame) & 0x7f) < 0x40)) &&
@ -1931,7 +1880,6 @@ static struct cvmx_usb_pipe *__cvmx_usb_find_ready_pipe(struct cvmx_usb_state *u
CVMX_PREFETCH(pipe->head, 0);
return pipe;
}
pipe = pipe->next;
}
return NULL;
}
@ -1998,13 +1946,11 @@ done:
*/
need_sof = 0;
for (ttype = CVMX_USB_TRANSFER_CONTROL; ttype <= CVMX_USB_TRANSFER_INTERRUPT; ttype++) {
pipe = usb->active_pipes[ttype].head;
while (pipe) {
list_for_each_entry(pipe, &usb->active_pipes[ttype], node) {
if (pipe->next_tx_frame > usb->frame_number) {
need_sof = 1;
break;
}
pipe = pipe->next;
}
}
USB_SET_FIELD32(CVMX_USBCX_GINTMSK(usb->index), union cvmx_usbcx_gintmsk, sofmsk, need_sof);
@ -2166,11 +2112,8 @@ static void __cvmx_usb_perform_complete(struct cvmx_usb_state *usb,
transaction->prev->next = transaction->next;
else
pipe->head = transaction->next;
if (!pipe->head) {
__cvmx_usb_remove_pipe(usb->active_pipes + pipe->transfer_type, pipe);
__cvmx_usb_append_pipe(&usb->idle_pipes, pipe);
}
if (!pipe->head)
list_move_tail(&pipe->node, &usb->idle_pipes);
octeon_usb_urb_complete_callback(usb, complete_code, pipe,
transaction,
transaction->actual_bytes,
@ -2247,8 +2190,8 @@ static struct cvmx_usb_transaction *__cvmx_usb_submit_transaction(struct cvmx_us
(usb->frame_number - pipe->next_tx_frame) % pipe->interval;
transaction->prev = NULL;
pipe->head = transaction;
__cvmx_usb_remove_pipe(&usb->idle_pipes, pipe);
__cvmx_usb_append_pipe(usb->active_pipes + pipe->transfer_type, pipe);
list_move_tail(&pipe->node,
&usb->active_pipes[pipe->transfer_type]);
}
pipe->tail = transaction;
@ -2451,7 +2394,7 @@ static int cvmx_usb_close_pipe(struct cvmx_usb_state *usb,
if (unlikely(pipe->head))
return -EBUSY;
__cvmx_usb_remove_pipe(&usb->idle_pipes, pipe);
list_del(&pipe->node);
kfree(pipe);
return 0;