ssb: Add Gigabit Ethernet driver

This adds the Gigabit Ethernet driver for the SSB
Gigabit Ethernet core. This driver actually is a frontend to
the Tigon3 driver. So the real work is done by tg3.
This device is used in the Linksys WRT350N.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 174 insertions, 0 deletions

diff --git a/include/linux/ssb/ssb_driver_gige.h b/include/linux/ssb/ssb_driver_gige.h
new file mode 100644
index 000000000000..01fbdf5fef22
--- /dev/null
+++ b/include/linux/ssb/ssb_driver_gige.h
@@ -0,0 +1,174 @@
+#ifndef LINUX_SSB_DRIVER_GIGE_H_
+#define LINUX_SSB_DRIVER_GIGE_H_
+
+#include <linux/ssb/ssb.h>
+#include <linux/pci.h>
+#include <linux/spinlock.h>
+
+
+#ifdef CONFIG_SSB_DRIVER_GIGE
+
+
+#define SSB_GIGE_PCIIO			0x0000 /* PCI I/O Registers (1024 bytes) */
+#define SSB_GIGE_RESERVED		0x0400 /* Reserved (1024 bytes) */
+#define SSB_GIGE_PCICFG			0x0800 /* PCI config space (256 bytes) */
+#define SSB_GIGE_SHIM_FLUSHSTAT		0x0C00 /* PCI to OCP: Flush status control (32bit) */
+#define SSB_GIGE_SHIM_FLUSHRDA		0x0C04 /* PCI to OCP: Flush read address (32bit) */
+#define SSB_GIGE_SHIM_FLUSHTO		0x0C08 /* PCI to OCP: Flush timeout counter (32bit) */
+#define SSB_GIGE_SHIM_BARRIER		0x0C0C /* PCI to OCP: Barrier register (32bit) */
+#define SSB_GIGE_SHIM_MAOCPSI		0x0C10 /* PCI to OCP: MaocpSI Control (32bit) */
+#define SSB_GIGE_SHIM_SIOCPMA		0x0C14 /* PCI to OCP: SiocpMa Control (32bit) */
+
+/* TM Status High flags */
+#define SSB_GIGE_TMSHIGH_RGMII		0x00010000 /* Have an RGMII PHY-bus */
+/* TM Status Low flags */
+#define SSB_GIGE_TMSLOW_TXBYPASS	0x00080000 /* TX bypass (no delay) */
+#define SSB_GIGE_TMSLOW_RXBYPASS	0x00100000 /* RX bypass (no delay) */
+#define SSB_GIGE_TMSLOW_DLLEN		0x01000000 /* Enable DLL controls */
+
+/* Boardflags (low) */
+#define SSB_GIGE_BFL_ROBOSWITCH		0x0010
+
+
+#define SSB_GIGE_MEM_RES_NAME		"SSB Broadcom 47xx GigE memory"
+#define SSB_GIGE_IO_RES_NAME		"SSB Broadcom 47xx GigE I/O"
+
+struct ssb_gige {
+	struct ssb_device *dev;
+
+	spinlock_t lock;
+
+	/* True, if the device has an RGMII bus.
+	 * False, if the device has a GMII bus. */
+	bool has_rgmii;
+
+	/* The PCI controller device. */
+	struct pci_controller pci_controller;
+	struct pci_ops pci_ops;
+	struct resource mem_resource;
+	struct resource io_resource;
+};
+
+/* Check whether a PCI device is a SSB Gigabit Ethernet core. */
+extern bool pdev_is_ssb_gige_core(struct pci_dev *pdev);
+
+/* Convert a pci_dev pointer to a ssb_gige pointer. */
+static inline struct ssb_gige * pdev_to_ssb_gige(struct pci_dev *pdev)
+{
+	if (!pdev_is_ssb_gige_core(pdev))
+		return NULL;
+	return container_of(pdev->bus->ops, struct ssb_gige, pci_ops);
+}
+
+/* Returns whether the PHY is connected by an RGMII bus. */
+static inline bool ssb_gige_is_rgmii(struct pci_dev *pdev)
+{
+	struct ssb_gige *dev = pdev_to_ssb_gige(pdev);
+	return (dev ? dev->has_rgmii : 0);
+}
+
+/* Returns whether we have a Roboswitch. */
+static inline bool ssb_gige_have_roboswitch(struct pci_dev *pdev)
+{
+	struct ssb_gige *dev = pdev_to_ssb_gige(pdev);
+	if (dev)
+		return !!(dev->dev->bus->sprom.boardflags_lo &
+			  SSB_GIGE_BFL_ROBOSWITCH);
+	return 0;
+}
+
+/* Returns whether we can only do one DMA at once. */
+static inline bool ssb_gige_one_dma_at_once(struct pci_dev *pdev)
+{
+	struct ssb_gige *dev = pdev_to_ssb_gige(pdev);
+	if (dev)
+		return ((dev->dev->bus->chip_id == 0x4785) &&
+			(dev->dev->bus->chip_rev < 2));
+	return 0;
+}
+
+/* Returns whether we must flush posted writes. */
+static inline bool ssb_gige_must_flush_posted_writes(struct pci_dev *pdev)
+{
+	struct ssb_gige *dev = pdev_to_ssb_gige(pdev);
+	if (dev)
+		return (dev->dev->bus->chip_id == 0x4785);
+	return 0;
+}
+
+extern char * nvram_get(const char *name);
+/* Get the device MAC address */
+static inline void ssb_gige_get_macaddr(struct pci_dev *pdev, u8 *macaddr)
+{
+#ifdef CONFIG_BCM947XX
+	char *res = nvram_get("et0macaddr");
+	if (res)
+		memcpy(macaddr, res, 6);
+#endif
+}
+
+extern int ssb_gige_pcibios_plat_dev_init(struct ssb_device *sdev,
+					  struct pci_dev *pdev);
+extern int ssb_gige_map_irq(struct ssb_device *sdev,
+			    const struct pci_dev *pdev);
+
+/* The GigE driver is not a standalone module, because we don't have support
+ * for unregistering the driver. So we could not unload the module anyway. */
+extern int ssb_gige_init(void);
+static inline void ssb_gige_exit(void)
+{
+	/* Currently we can not unregister the GigE driver,
+	 * because we can not unregister the PCI bridge. */
+	BUG();
+}
+
+
+#else /* CONFIG_SSB_DRIVER_GIGE */
+/* Gigabit Ethernet driver disabled */
+
+
+static inline int ssb_gige_pcibios_plat_dev_init(struct ssb_device *sdev,
+						 struct pci_dev *pdev)
+{
+	return -ENOSYS;
+}
+static inline int ssb_gige_map_irq(struct ssb_device *sdev,
+				   const struct pci_dev *pdev)
+{
+	return -ENOSYS;
+}
+static inline int ssb_gige_init(void)
+{
+	return 0;
+}
+static inline void ssb_gige_exit(void)
+{
+}
+
+static inline bool pdev_is_ssb_gige_core(struct pci_dev *pdev)
+{
+	return 0;
+}
+static inline struct ssb_gige * pdev_to_ssb_gige(struct pci_dev *pdev)
+{
+	return NULL;
+}
+static inline bool ssb_gige_is_rgmii(struct pci_dev *pdev)
+{
+	return 0;
+}
+static inline bool ssb_gige_have_roboswitch(struct pci_dev *pdev)
+{
+	return 0;
+}
+static inline bool ssb_gige_one_dma_at_once(struct pci_dev *pdev)
+{
+	return 0;
+}
+static inline bool ssb_gige_must_flush_posted_writes(struct pci_dev *pdev)
+{
+	return 0;
+}
+
+#endif /* CONFIG_SSB_DRIVER_GIGE */
+#endif /* LINUX_SSB_DRIVER_GIGE_H_ */