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authorDavid Gibson <david@gibson.dropbear.id.au>2007-08-23 13:56:01 +1000
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:51:52 -0700
commit1d3bb996481e116f5f2b127cbd29b83365d2cf62 (patch)
treeb612a1dbf51c920fb5a9758a6d35f9ed37eb927f /drivers/net/ibm_newemac/rgmii.h
parent03233b90b0977d577322a6e1ddd56d9cc570d406 (diff)
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 <david@gibson.dropbear.id.au> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/ibm_newemac/rgmii.h')
-rw-r--r--drivers/net/ibm_newemac/rgmii.h76
1 files changed, 76 insertions, 0 deletions
diff --git a/drivers/net/ibm_newemac/rgmii.h b/drivers/net/ibm_newemac/rgmii.h
new file mode 100644
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+++ b/drivers/net/ibm_newemac/rgmii.h
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+/*
+ * drivers/net/ibm_newemac/rgmii.h
+ *
+ * Driver for PowerPC 4xx on-chip ethernet controller, RGMII bridge support.
+ *
+ * Based on ocp_zmii.h/ibm_emac_zmii.h
+ * Armin Kuster akuster@mvista.com
+ *
+ * Copyright 2004 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * Copyright (c) 2004, 2005 Zultys Technologies.
+ * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *
+ * 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_RGMII_H
+#define __IBM_NEWEMAC_RGMII_H
+
+/* RGMII bridge type */
+#define RGMII_STANDARD 0
+#define RGMII_AXON 1
+
+/* RGMII bridge */
+struct rgmii_regs {
+ u32 fer; /* Function enable register */
+ u32 ssr; /* Speed select register */
+};
+
+/* RGMII device */
+struct rgmii_instance {
+ struct rgmii_regs __iomem *base;
+
+ /* Type of RGMII bridge */
+ int type;
+
+ /* Only one EMAC whacks us at a time */
+ struct mutex lock;
+
+ /* number of EMACs using this RGMII bridge */
+ int users;
+
+ /* OF device instance */
+ struct of_device *ofdev;
+};
+
+#ifdef CONFIG_IBM_NEW_EMAC_RGMII
+
+extern int rgmii_init(void);
+extern void rgmii_exit(void);
+extern int rgmii_attach(struct of_device *ofdev, int input, int mode);
+extern void rgmii_detach(struct of_device *ofdev, int input);
+extern void rgmii_get_mdio(struct of_device *ofdev, int input);
+extern void rgmii_put_mdio(struct of_device *ofdev, int input);
+extern void rgmii_set_speed(struct of_device *ofdev, int input, int speed);
+extern int rgmii_get_regs_len(struct of_device *ofdev);
+extern void *rgmii_dump_regs(struct of_device *ofdev, void *buf);
+
+#else
+
+# define rgmii_init() 0
+# define rgmii_exit() do { } while(0)
+# define rgmii_attach(x,y,z) (-ENXIO)
+# define rgmii_detach(x,y) do { } while(0)
+# define rgmii_get_mdio(o,i) do { } while (0)
+# define rgmii_put_mdio(o,i) do { } while (0)
+# define rgmii_set_speed(x,y,z) do { } while(0)
+# define rgmii_get_regs_len(x) 0
+# define rgmii_dump_regs(x,buf) (buf)
+#endif /* !CONFIG_IBM_NEW_EMAC_RGMII */
+
+#endif /* __IBM_NEWEMAC_RGMII_H */