From 1d3bb996481e116f5f2b127cbd29b83365d2cf62 Mon Sep 17 00:00:00 2001 From: David Gibson Date: Thu, 23 Aug 2007 13:56:01 +1000 Subject: Device tree aware EMAC driver Based on BenH's earlier work, this is a new version of the EMAC driver for the built-in ethernet found on PowerPC 4xx embedded CPUs. The same ASIC is also found in the Axon bridge chip. This new version is designed to work in the arch/powerpc tree, using the device tree to probe the device, rather than the old and ugly arch/ppc OCP layer. This driver is designed to sit alongside the old driver (that lies in drivers/net/ibm_emac and this one in drivers/net/ibm_newemac). The old driver is left in place to support arch/ppc until arch/ppc itself reaches its final demise (not too long now, with luck). This driver still has a number of things that could do with cleaning up, but I think they can be fixed up after merging. Specifically: - Should be adjusted to properly use the dma mapping API. Axon needs this. - Probe logic needs reworking, in conjuction with the general probing code for of_platform devices. The dependencies here between EMAC, MAL, ZMII etc. make this complicated. At present, it usually works, because we initialize and register the sub-drivers before the EMAC driver itself, and (being in driver code) runs after the devices themselves have been instantiated from the device tree. Signed-off-by: David Gibson Signed-off-by: Jeff Garzik --- drivers/net/ibm_newemac/tah.h | 90 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 90 insertions(+) create mode 100644 drivers/net/ibm_newemac/tah.h (limited to 'drivers/net/ibm_newemac/tah.h') diff --git a/drivers/net/ibm_newemac/tah.h b/drivers/net/ibm_newemac/tah.h new file mode 100644 index 00000000000..bc41853b6e2 --- /dev/null +++ b/drivers/net/ibm_newemac/tah.h @@ -0,0 +1,90 @@ +/* + * drivers/net/ibm_newemac/tah.h + * + * Driver for PowerPC 4xx on-chip ethernet controller, TAH support. + * + * Copyright 2004 MontaVista Software, Inc. + * Matt Porter + * + * Copyright (c) 2005 Eugene Surovegin + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#ifndef __IBM_NEWEMAC_TAH_H +#define __IBM_NEWEMAC_TAH_H + +/* TAH */ +struct tah_regs { + u32 revid; + u32 pad[3]; + u32 mr; + u32 ssr0; + u32 ssr1; + u32 ssr2; + u32 ssr3; + u32 ssr4; + u32 ssr5; + u32 tsr; +}; + + +/* TAH device */ +struct tah_instance { + struct tah_regs __iomem *base; + + /* Only one EMAC whacks us at a time */ + struct mutex lock; + + /* number of EMACs using this TAH */ + int users; + + /* OF device instance */ + struct of_device *ofdev; +}; + + +/* TAH engine */ +#define TAH_MR_CVR 0x80000000 +#define TAH_MR_SR 0x40000000 +#define TAH_MR_ST_256 0x01000000 +#define TAH_MR_ST_512 0x02000000 +#define TAH_MR_ST_768 0x03000000 +#define TAH_MR_ST_1024 0x04000000 +#define TAH_MR_ST_1280 0x05000000 +#define TAH_MR_ST_1536 0x06000000 +#define TAH_MR_TFS_16KB 0x00000000 +#define TAH_MR_TFS_2KB 0x00200000 +#define TAH_MR_TFS_4KB 0x00400000 +#define TAH_MR_TFS_6KB 0x00600000 +#define TAH_MR_TFS_8KB 0x00800000 +#define TAH_MR_TFS_10KB 0x00a00000 +#define TAH_MR_DTFP 0x00100000 +#define TAH_MR_DIG 0x00080000 + +#ifdef CONFIG_IBM_NEW_EMAC_TAH + +extern int tah_init(void); +extern void tah_exit(void); +extern int tah_attach(struct of_device *ofdev, int channel); +extern void tah_detach(struct of_device *ofdev, int channel); +extern void tah_reset(struct of_device *ofdev); +extern int tah_get_regs_len(struct of_device *ofdev); +extern void *tah_dump_regs(struct of_device *ofdev, void *buf); + +#else + +# define tah_init() 0 +# define tah_exit() do { } while(0) +# define tah_attach(x,y) (-ENXIO) +# define tah_detach(x,y) do { } while(0) +# define tah_reset(x) do { } while(0) +# define tah_get_regs_len(x) 0 +# define tah_dump_regs(x,buf) (buf) + +#endif /* !CONFIG_IBM_NEW_EMAC_TAH */ + +#endif /* __IBM_NEWEMAC_TAH_H */ -- cgit v1.2.3