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Staging: octeon-usb: Replaces CVMX_WAIT_FOR_FIELD32 macro with a function

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Replaces CVMX_WAIT_FOR_FIELD32 macro with equivalent function.

Signed-off-by: Georgios Tsotsos <tsotsos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Georgios Tsotsos 2018-08-13 19:25:29 +03:00 committed by Greg Kroah-Hartman
parent c28b6699ac
commit 3e195a80e0
1 changed files with 29 additions and 27 deletions
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56
drivers/staging/octeon-usb/octeon-hcd.c
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@ -377,29 +377,6 @@ struct octeon_hcd {
struct cvmx_usb_tx_fifo nonperiodic; struct cvmx_usb_tx_fifo nonperiodic;
}; };
/* This macro spins on a register waiting for it to reach a condition. */
#define CVMX_WAIT_FOR_FIELD32(address, _union, cond, timeout_usec) \
({int result; \
do { \
u64 done = cvmx_get_cycle() + (u64)timeout_usec * \
octeon_get_clock_rate() / 1000000; \
union _union c; \
\
while (1) { \
c.u32 = cvmx_usb_read_csr32(usb, address); \
\
if (cond) { \
result = 0; \
break; \
} else if (cvmx_get_cycle() > done) { \
result = -1; \
break; \
} else \
__delay(100); \
} \
} while (0); \
result; })
/* /*
* This macro logically sets a single field in a CSR. It does the sequence * This macro logically sets a single field in a CSR. It does the sequence
* read, modify, and write * read, modify, and write
@ -593,6 +570,33 @@ static inline int cvmx_usb_get_data_pid(struct cvmx_usb_pipe *pipe)
return 0; /* Data0 */ return 0; /* Data0 */
} }
/* Loops through register until txfflsh or rxfflsh become zero.*/
static int cvmx_wait_tx_rx(struct octeon_hcd *usb, int fflsh_type)
{
int result;
u64 address = CVMX_USBCX_GRSTCTL(usb->index);
u64 done = cvmx_get_cycle() + 100 *
(u64)octeon_get_clock_rate / 1000000;
union cvmx_usbcx_grstctl c;
while (1) {
c.u32 = cvmx_usb_read_csr32(usb, address);
if (fflsh_type == 0 && c.s.txfflsh == 0) {
result = 0;
break;
} else if (fflsh_type == 1 && c.s.rxfflsh == 0) {
result = 0;
break;
} else if (cvmx_get_cycle() > done) {
result = -1;
break;
}
__delay(100);
}
return result;
}
static void cvmx_fifo_setup(struct octeon_hcd *usb) static void cvmx_fifo_setup(struct octeon_hcd *usb)
{ {
union cvmx_usbcx_ghwcfg3 usbcx_ghwcfg3; union cvmx_usbcx_ghwcfg3 usbcx_ghwcfg3;
@ -634,12 +638,10 @@ static void cvmx_fifo_setup(struct octeon_hcd *usb)
cvmx_usbcx_grstctl, txfnum, 0x10); cvmx_usbcx_grstctl, txfnum, 0x10);
USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index),
cvmx_usbcx_grstctl, txfflsh, 1); cvmx_usbcx_grstctl, txfflsh, 1);
CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_wait_tx_rx(usb, 0);
cvmx_usbcx_grstctl, c.s.txfflsh == 0, 100);
USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), USB_SET_FIELD32(CVMX_USBCX_GRSTCTL(usb->index),
cvmx_usbcx_grstctl, rxfflsh, 1); cvmx_usbcx_grstctl, rxfflsh, 1);
CVMX_WAIT_FOR_FIELD32(CVMX_USBCX_GRSTCTL(usb->index), cvmx_wait_tx_rx(usb, 1);
cvmx_usbcx_grstctl, c.s.rxfflsh == 0, 100);
} }
/** /**