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| author | Wolfgang Grandegger <wg@grandegger.com> | 2008-06-05 13:12:05 +0200 |
|---|---|---|
| committer | Andrew Fleming-AFLEMING <afleming@freescale.com> | 2008-06-10 23:59:44 -0500 |
| commit | d9ee843d54c54776e1fdb86336ce554906a87331 (patch) | |
| tree | 3b0d55c9ed3680defecf3b345ff19305cb315e0f /board/tqc/tqm85xx/tqm85xx.c | |
| parent | 518d5cfe72916323c746af1647764459914f555f (diff) | |
| download | u-boot-imx-d9ee843d54c54776e1fdb86336ce554906a87331.zip u-boot-imx-d9ee843d54c54776e1fdb86336ce554906a87331.tar.gz u-boot-imx-d9ee843d54c54776e1fdb86336ce554906a87331.tar.bz2 | |
TQM85xx: Support for Intel 82527 compatible CAN controller
This patch adds initialization of the UPMC RAM to support up to two
Intel 82527 compatible CAN controller on the TQM85xx modules.
Signed-off-by: Thomas Waehner <thomas.waehner@tqs.de>
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Diffstat (limited to 'board/tqc/tqm85xx/tqm85xx.c')
| -rw-r--r-- | board/tqc/tqm85xx/tqm85xx.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/board/tqc/tqm85xx/tqm85xx.c b/board/tqc/tqm85xx/tqm85xx.c index a45df2b..4fb9c11 100644 --- a/board/tqc/tqm85xx/tqm85xx.c +++ b/board/tqc/tqm85xx/tqm85xx.c @@ -31,6 +31,7 @@ #include <pci.h> #include <asm/processor.h> #include <asm/immap_85xx.h> +#include <asm/io.h> #include <ioports.h> #include <flash.h> @@ -333,6 +334,27 @@ int misc_init_r (void) return 0; } +#ifdef CONFIG_CAN_DRIVER +/* + * Initialize UPMC RAM + */ +static void upmc_write (u_char addr, uint val) +{ + volatile ccsr_lbc_t *lbc = (void *)(CFG_MPC85xx_LBC_ADDR); + + out_be32 (&lbc->mdr, val); + + clrsetbits_be32(&lbc->mcmr, MxMR_MAD_MSK, + MxMR_OP_WARR | (addr & MxMR_MAD_MSK)); + + /* dummy access to perform write */ + out_8 ((void __iomem *)CFG_CAN_BASE, 0); + + /* normal operation */ + clrbits_be32(&lbc->mcmr, MxMR_OP_WARR); +} +#endif /* CONFIG_CAN_DRIVER */ + /* * Initialize Local Bus */ @@ -389,6 +411,41 @@ void local_bus_init (void) gur->lbcdllcr = (((temp_lbcdll & 0xff) << 16) | 0x80000000); asm ("sync;isync;msync"); } + +#ifdef CONFIG_CAN_DRIVER + /* + * According to timing specifications EAD must be + * set if Local Bus Clock is > 83 MHz. + */ + if (lbc_hz > 83) + out_be32 (&lbc->or2, CFG_OR2_CAN | OR_UPM_EAD); + else + out_be32 (&lbc->or2, CFG_OR2_CAN); + out_be32 (&lbc->br2, CFG_BR2_CAN); + + /* LGPL4 is UPWAIT */ + out_be32(&lbc->mcmr, MxMR_DSx_3_CYCL | MxMR_GPL_x4DIS | MxMR_WLFx_3X); + + /* Initialize UPMC for CAN: single read */ + upmc_write (0x00, 0xFFFFED00); + upmc_write (0x01, 0xCCFFCC00); + upmc_write (0x02, 0x00FFCF00); + upmc_write (0x03, 0x00FFCF00); + upmc_write (0x04, 0x00FFDC00); + upmc_write (0x05, 0x00FFCF00); + upmc_write (0x06, 0x00FFED00); + upmc_write (0x07, 0x3FFFCC07); + + /* Initialize UPMC for CAN: single write */ + upmc_write (0x18, 0xFFFFED00); + upmc_write (0x19, 0xCCFFEC00); + upmc_write (0x1A, 0x00FFED80); + upmc_write (0x1B, 0x00FFED80); + upmc_write (0x1C, 0x00FFFC00); + upmc_write (0x1D, 0x0FFFEC00); + upmc_write (0x1E, 0x0FFFEF00); + upmc_write (0x1F, 0x3FFFEC05); +#endif /* CONFIG_CAN_DRIVER */ } #if defined(CONFIG_PCI) |