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authorLinus Torvalds <torvalds@linux-foundation.org>2010-05-25 15:04:17 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-25 15:04:17 -0400
commit702c0b04978ce316ec05f4d0a9c148fac124335b (patch)
tree3908c5821221d950a6b1a7e2e898899e63e7d437 /drivers/serial
parentc19eb8f0d1bd442ed1aff0b413dd822620771c29 (diff)
parentbf6a67ee3427ab142136e03e90d0b67ecbca5ff2 (diff)
Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6
* 'next-spi' of git://git.secretlab.ca/git/linux-2.6: spi/xilinx: Fix compile error spi/davinci: Fix clock prescale factor computation spi: move bitbang txrx utility functions to private header spi/mpc5121: Add SPI master driver for MPC5121 PSC powerpc/mpc5121: move PSC FIFO memory init to platform code spi/ep93xx: implemented driver for Cirrus EP93xx SPI controller Documentation/spi/* compile warning fix spi/omap2_mcspi: Check params before dereference or use spi/omap2_mcspi: add turbo mode support spi/omap2_mcspi: change default DMA_MIN_BYTES value to 160 spi/pl022: fix stop queue procedure spi/pl022: add support for the PL023 derivate spi/pl022: fix up differences between ARM and ST versions spi/spi_mpc8xxx: Do not use map_tx_dma to unmap rx_dma spi/spi_mpc8xxx: Fix QE mode Litte Endian spi/spi_mpc8xxx: fix potential memory corruption.
Diffstat (limited to 'drivers/serial')
-rw-r--r--drivers/serial/mpc52xx_uart.c69
1 files changed, 0 insertions, 69 deletions
diff --git a/drivers/serial/mpc52xx_uart.c b/drivers/serial/mpc52xx_uart.c
index beb4710faeee..84a35f699016 100644
--- a/drivers/serial/mpc52xx_uart.c
+++ b/drivers/serial/mpc52xx_uart.c
@@ -397,34 +397,10 @@ static unsigned long mpc512x_getuartclk(void *p)
397 return mpc5xxx_get_bus_frequency(p); 397 return mpc5xxx_get_bus_frequency(p);
398} 398}
399 399
400#define DEFAULT_FIFO_SIZE 16
401
402static unsigned int __init get_fifo_size(struct device_node *np,
403 char *fifo_name)
404{
405 const unsigned int *fp;
406
407 fp = of_get_property(np, fifo_name, NULL);
408 if (fp)
409 return *fp;
410
411 pr_warning("no %s property in %s node, defaulting to %d\n",
412 fifo_name, np->full_name, DEFAULT_FIFO_SIZE);
413
414 return DEFAULT_FIFO_SIZE;
415}
416
417#define FIFOC(_base) ((struct mpc512x_psc_fifo __iomem *) \
418 ((u32)(_base) + sizeof(struct mpc52xx_psc)))
419
420/* Init PSC FIFO Controller */ 400/* Init PSC FIFO Controller */
421static int __init mpc512x_psc_fifoc_init(void) 401static int __init mpc512x_psc_fifoc_init(void)
422{ 402{
423 struct device_node *np; 403 struct device_node *np;
424 void __iomem *psc;
425 unsigned int tx_fifo_size;
426 unsigned int rx_fifo_size;
427 int fifobase = 0; /* current fifo address in 32 bit words */
428 404
429 np = of_find_compatible_node(NULL, NULL, 405 np = of_find_compatible_node(NULL, NULL,
430 "fsl,mpc5121-psc-fifo"); 406 "fsl,mpc5121-psc-fifo");
@@ -447,51 +423,6 @@ static int __init mpc512x_psc_fifoc_init(void)
447 return -ENODEV; 423 return -ENODEV;
448 } 424 }
449 425
450 for_each_compatible_node(np, NULL, "fsl,mpc5121-psc-uart") {
451 tx_fifo_size = get_fifo_size(np, "fsl,tx-fifo-size");
452 rx_fifo_size = get_fifo_size(np, "fsl,rx-fifo-size");
453
454 /* size in register is in 4 byte units */
455 tx_fifo_size /= 4;
456 rx_fifo_size /= 4;
457 if (!tx_fifo_size)
458 tx_fifo_size = 1;
459 if (!rx_fifo_size)
460 rx_fifo_size = 1;
461
462 psc = of_iomap(np, 0);
463 if (!psc) {
464 pr_err("%s: Can't map %s device\n",
465 __func__, np->full_name);
466 continue;
467 }
468
469 /* FIFO space is 4KiB, check if requested size is available */
470 if ((fifobase + tx_fifo_size + rx_fifo_size) > 0x1000) {
471 pr_err("%s: no fifo space available for %s\n",
472 __func__, np->full_name);
473 iounmap(psc);
474 /*
475 * chances are that another device requests less
476 * fifo space, so we continue.
477 */
478 continue;
479 }
480 /* set tx and rx fifo size registers */
481 out_be32(&FIFOC(psc)->txsz, (fifobase << 16) | tx_fifo_size);
482 fifobase += tx_fifo_size;
483 out_be32(&FIFOC(psc)->rxsz, (fifobase << 16) | rx_fifo_size);
484 fifobase += rx_fifo_size;
485
486 /* reset and enable the slices */
487 out_be32(&FIFOC(psc)->txcmd, 0x80);
488 out_be32(&FIFOC(psc)->txcmd, 0x01);
489 out_be32(&FIFOC(psc)->rxcmd, 0x80);
490 out_be32(&FIFOC(psc)->rxcmd, 0x01);
491
492 iounmap(psc);
493 }
494
495 return 0; 426 return 0;
496} 427}
497 428