brcm80211: fmac: add USB support for bcm43235/6/8 chipsets

This patch extends the use of the brcmfmac driver with support for
chipsets with a USB host interface. The first chipsets supported are
the bcm43235, bcm43236, and bcm43238 for which firmware has been
submitted.

This driver change has been successfully built for x86, x86_64,
ppc64, arm_le, and mips_be.

It has been tested successfully on x86 and x86_64.

Cc: M. Lambert <lambertm@westman.wave.ca>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Kan Yan <kanyan@broadcom.com>
Reviewed-by: Alwin Beukers <alwin@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/Kconfig

@@ -26,16 +26,25 @@ config BRCMFMAC
 	  it'll be called brcmfmac.ko.
 
 config BRCMFMAC_SDIO
-	bool "SDIO bus interface support for FullMAC"
+	bool "SDIO bus interface support for FullMAC driver"
 	depends on MMC
 	depends on BRCMFMAC
 	select FW_LOADER
 	default y
 	---help---
 	  This option enables the SDIO bus interface support for Broadcom
-	  FullMAC WLAN driver.
-	  Say Y if you want to use brcmfmac for a compatible SDIO interface
-	  wireless card.
+	  IEEE802.11n embedded FullMAC WLAN driver. Say Y if you want to
+	  use the driver for a SDIO wireless card.
+
+config BRCMFMAC_USB
+	bool "USB bus interface support for FullMAC driver"
+	depends on USB
+	depends on BRCMFMAC
+	select FW_LOADER
+	---help---
+	  This option enables the USB bus interface support for Broadcom
+	  IEEE802.11n embedded FullMAC WLAN driver. Say Y if you want to
+	  use the driver for an USB wireless card.
 
 config BRCMDBG
 	bool "Broadcom driver debug functions"

drivers/net/wireless/brcm80211/brcmfmac/Makefile

@@ -19,6 +19,8 @@ ccflags-y += \
 	-Idrivers/net/wireless/brcm80211/brcmfmac	\
 	-Idrivers/net/wireless/brcm80211/include
 
+ccflags-y += -D__CHECK_ENDIAN__
+
 obj-$(CONFIG_BRCMFMAC) += brcmfmac.o
 brcmfmac-objs += \
 		wl_cfg80211.o \
@@ -30,5 +32,5 @@ brcmfmac-$(CONFIG_BRCMFMAC_SDIO) += \
 		bcmsdh.o \
 		bcmsdh_sdmmc.o \
 		sdio_chip.o
-
-ccflags-y += -D__CHECK_ENDIAN__
+brcmfmac-$(CONFIG_BRCMFMAC_USB) += \
+		usb.o

drivers/net/wireless/brcm80211/brcmfmac/dhd_bus.h

@@ -40,8 +40,8 @@ struct dngl_stats {
 struct brcmf_bus {
 	u8 type;		/* bus type */
 	union {
-		/* pointer to sdio private structure */
 		struct brcmf_sdio_dev *sdio;
+		struct brcmf_usbdev *usb;
 	} bus_priv;
 	struct brcmf_pub *drvr;	/* pointer to driver pub structure brcmf_pub */
 	enum brcmf_bus_state state;
@@ -110,5 +110,9 @@ extern int brcmf_add_if(struct device *dev, int ifidx,
 extern void brcmf_sdio_exit(void);
 extern int brcmf_sdio_init(void);
 #endif
+#ifdef CONFIG_BRCMFMAC_USB
+extern void brcmf_usb_exit(void);
+extern int brcmf_usb_init(void);
+#endif
 
 #endif				/* _BRCMF_BUS_H_ */

drivers/net/wireless/brcm80211/brcmfmac/dhd_linux.c

@@ -1190,6 +1190,11 @@ static int __init brcmfmac_init(void)
 	if (ret)
 		goto fail;
 #endif
+#ifdef CONFIG_BRCMFMAC_USB
+	ret = brcmf_usb_init();
+	if (ret)
+		goto fail;
+#endif
 
 fail:
 	return ret;
@@ -1200,6 +1205,9 @@ static void __exit brcmfmac_exit(void)
 #ifdef CONFIG_BRCMFMAC_SDIO
 	brcmf_sdio_exit();
 #endif
+#ifdef CONFIG_BRCMFMAC_USB
+	brcmf_usb_exit();
+#endif
 }
 
 module_init(brcmfmac_init);

drivers/net/wireless/brcm80211/brcmfmac/usb.h

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2011 Broadcom Corporation
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#ifndef BRCMFMAC_USB_H
+#define BRCMFMAC_USB_H
+
+enum brcmf_usb_state {
+	BCMFMAC_USB_STATE_DL_PENDING,
+	BCMFMAC_USB_STATE_DL_DONE,
+	BCMFMAC_USB_STATE_UP,
+	BCMFMAC_USB_STATE_DOWN,
+	BCMFMAC_USB_STATE_PNP_FWDL,
+	BCMFMAC_USB_STATE_DISCONNECT,
+	BCMFMAC_USB_STATE_SLEEP
+};
+
+enum brcmf_usb_pnp_state {
+	BCMFMAC_USB_PNP_DISCONNECT,
+	BCMFMAC_USB_PNP_SLEEP,
+	BCMFMAC_USB_PNP_RESUME,
+};
+
+struct brcmf_stats {
+	u32 tx_errors;
+	u32 tx_packets;
+	u32 tx_multicast;
+	u32 tx_ctlpkts;
+	u32 tx_ctlerrs;
+	u32 tx_dropped;
+	u32 tx_flushed;
+	u32 rx_errors;
+	u32 rx_packets;
+	u32 rx_multicast;
+	u32 rx_ctlpkts;
+	u32 rx_ctlerrs;
+	u32 rx_dropped;
+	u32 rx_flushed;
+
+};
+
+struct brcmf_usb_attrib {
+	int bustype;
+	int vid;
+	int pid;
+	int devid;
+	int chiprev; /* chip revsion number */
+	int mtu;
+	int nchan; /* Data Channels */
+	int has_2nd_bulk_in_ep;
+};
+
+struct brcmf_usbdev_info;
+
+struct brcmf_usbdev {
+	struct brcmf_bus *bus;
+	struct brcmf_usbdev_info *devinfo;
+	enum brcmf_usb_state state;
+	struct brcmf_stats stats;
+	int ntxq, nrxq, rxsize;
+	u32 bus_mtu;
+	struct brcmf_usb_attrib attrib;
+};
+
+/* IO Request Block (IRB) */
+struct brcmf_usbreq {
+	struct list_head list;
+	struct brcmf_usbdev_info *devinfo;
+	struct urb *urb;
+	struct sk_buff  *skb;
+};
+
+#endif /* BRCMFMAC_USB_H */

drivers/net/wireless/brcm80211/brcmfmac/usb_rdl.h

@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2011 Broadcom Corporation
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _USB_RDL_H
+#define _USB_RDL_H
+
+/* Control messages: bRequest values */
+#define DL_GETSTATE	0	/* returns the rdl_state_t struct */
+#define DL_CHECK_CRC	1	/* currently unused */
+#define DL_GO		2	/* execute downloaded image */
+#define DL_START	3	/* initialize dl state */
+#define DL_REBOOT	4	/* reboot the device in 2 seconds */
+#define DL_GETVER	5	/* returns the bootrom_id_t struct */
+#define DL_GO_PROTECTED	6	/* execute the downloaded code and set reset
+				 * event to occur in 2 seconds.  It is the
+				 * responsibility of the downloaded code to
+				 * clear this event
+				 */
+#define DL_EXEC		7	/* jump to a supplied address */
+#define DL_RESETCFG	8	/* To support single enum on dongle
+				 * - Not used by bootloader
+				 */
+#define DL_DEFER_RESP_OK 9	/* Potentially defer the response to setup
+				 * if resp unavailable
+				 */
+
+/* states */
+#define DL_WAITING	0	/* waiting to rx first pkt */
+#define DL_READY	1	/* hdr was good, waiting for more of the
+				 * compressed image */
+#define DL_BAD_HDR	2	/* hdr was corrupted */
+#define DL_BAD_CRC	3	/* compressed image was corrupted */
+#define DL_RUNNABLE	4	/* download was successful,waiting for go cmd */
+#define DL_START_FAIL	5	/* failed to initialize correctly */
+#define DL_NVRAM_TOOBIG	6	/* host specified nvram data exceeds DL_NVRAM
+				 * value */
+#define DL_IMAGE_TOOBIG	7	/* download image too big (exceeds DATA_START
+				 *  for rdl) */
+
+struct rdl_state_le {
+	__le32 state;
+	__le32 bytes;
+};
+
+struct bootrom_id_le {
+	__le32 chip;	/* Chip id */
+	__le32 chiprev;	/* Chip rev */
+	__le32 ramsize;	/* Size of  RAM */
+	__le32 remapbase;	/* Current remap base address */
+	__le32 boardtype;	/* Type of board */
+	__le32 boardrev;	/* Board revision */
+};
+
+#define RDL_CHUNK	1500  /* size of each dl transfer */
+
+#define TRX_OFFSETS_DLFWLEN_IDX	0
+#define TRX_OFFSETS_JUMPTO_IDX	1
+#define TRX_OFFSETS_NVM_LEN_IDX	2
+
+#define TRX_OFFSETS_DLBASE_IDX  0
+
+#endif  /* _USB_RDL_H */