mISDN: Add HFC USB driver

Enable support for USB ISDN TAs with Cologne Chip AG's
HFC-S USB ISDN Controller.

Signed-off-by: Martin Bachem <m.bachem@gmx.de>
Signed-off-by: Karsten Keil <kkeil@suse.de>

drivers/isdn/hardware/mISDN/Kconfig

@@ -23,3 +23,10 @@ config MISDN_HFCMULTI
 	   * HFC-8S (8 S/T interfaces on one chip)
 	   * HFC-E1 (E1 interface for 2Mbit ISDN)
 
+config MISDN_HFCUSB
+	tristate "Support for HFC-S USB based TAs"
+	depends on USB
+	help
+	  Enable support for USB ISDN TAs with Cologne Chip AG's
+	  HFC-S USB ISDN Controller
+

drivers/isdn/hardware/mISDN/Makefile

@@ -5,3 +5,4 @@
 
 obj-$(CONFIG_MISDN_HFCPCI) += hfcpci.o
 obj-$(CONFIG_MISDN_HFCMULTI) += hfcmulti.o
+obj-$(CONFIG_MISDN_HFCUSB) += hfcsusb.o

drivers/isdn/hardware/mISDN/hfcsusb.h

+/*
+ * hfcsusb.h, HFC-S USB mISDN driver
+ */
+
+#ifndef __HFCSUSB_H__
+#define __HFCSUSB_H__
+
+
+#define DRIVER_NAME "HFC-S_USB"
+
+#define DBG_HFC_CALL_TRACE	0x00010000
+#define DBG_HFC_FIFO_VERBOSE	0x00020000
+#define DBG_HFC_USB_VERBOSE	0x00100000
+#define DBG_HFC_URB_INFO	0x00200000
+#define DBG_HFC_URB_ERROR	0x00400000
+
+#define DEFAULT_TRANSP_BURST_SZ 128
+
+#define HFC_CTRL_TIMEOUT	20	/* 5ms timeout writing/reading regs */
+#define CLKDEL_TE		0x0f	/* CLKDEL in TE mode */
+#define CLKDEL_NT		0x6c	/* CLKDEL in NT mode */
+
+/* hfcsusb Layer1 commands */
+#define HFC_L1_ACTIVATE_TE		1
+#define HFC_L1_ACTIVATE_NT		2
+#define HFC_L1_DEACTIVATE_NT		3
+#define HFC_L1_FORCE_DEACTIVATE_TE	4
+
+/* cmd FLAGS in HFCUSB_STATES register */
+#define HFCUSB_LOAD_STATE	0x10
+#define HFCUSB_ACTIVATE		0x20
+#define HFCUSB_DO_ACTION	0x40
+#define HFCUSB_NT_G2_G3		0x80
+
+/* timers */
+#define NT_ACTIVATION_TIMER	0x01	/* enables NT mode activation Timer */
+#define NT_T1_COUNT		10
+
+#define MAX_BCH_SIZE 		2048	/* allowed B-channel packet size */
+
+#define HFCUSB_RX_THRESHOLD 	64	/* threshold for fifo report bit rx */
+#define HFCUSB_TX_THRESHOLD 	96	/* threshold for fifo report bit tx */
+
+#define HFCUSB_CHIP_ID		0x16	/* Chip ID register index */
+#define HFCUSB_CIRM		0x00	/* cirm register index */
+#define HFCUSB_USB_SIZE		0x07	/* int length register */
+#define HFCUSB_USB_SIZE_I	0x06	/* iso length register */
+#define HFCUSB_F_CROSS		0x0b	/* bit order register */
+#define HFCUSB_CLKDEL		0x37	/* bit delay register */
+#define HFCUSB_CON_HDLC		0xfa	/* channel connect register */
+#define HFCUSB_HDLC_PAR		0xfb
+#define HFCUSB_SCTRL		0x31	/* S-bus control register (tx) */
+#define HFCUSB_SCTRL_E		0x32	/* same for E and special funcs */
+#define HFCUSB_SCTRL_R		0x33	/* S-bus control register (rx) */
+#define HFCUSB_F_THRES		0x0c	/* threshold register */
+#define HFCUSB_FIFO		0x0f	/* fifo select register */
+#define HFCUSB_F_USAGE		0x1a	/* fifo usage register */
+#define HFCUSB_MST_MODE0	0x14
+#define HFCUSB_MST_MODE1	0x15
+#define HFCUSB_P_DATA		0x1f
+#define HFCUSB_INC_RES_F	0x0e
+#define HFCUSB_B1_SSL		0x20
+#define HFCUSB_B2_SSL		0x21
+#define HFCUSB_B1_RSL		0x24
+#define HFCUSB_B2_RSL		0x25
+#define HFCUSB_STATES		0x30
+
+
+#define HFCUSB_CHIPID		0x40	/* ID value of HFC-S USB */
+
+/* fifo registers */
+#define HFCUSB_NUM_FIFOS	8	/* maximum number of fifos */
+#define HFCUSB_B1_TX		0	/* index for B1 transmit bulk/int */
+#define HFCUSB_B1_RX		1	/* index for B1 receive bulk/int */
+#define HFCUSB_B2_TX		2
+#define HFCUSB_B2_RX		3
+#define HFCUSB_D_TX		4
+#define HFCUSB_D_RX		5
+#define HFCUSB_PCM_TX		6
+#define HFCUSB_PCM_RX		7
+
+
+#define USB_INT		0
+#define USB_BULK	1
+#define USB_ISOC	2
+
+#define ISOC_PACKETS_D	8
+#define ISOC_PACKETS_B	8
+#define ISO_BUFFER_SIZE	128
+
+/* defines how much ISO packets are handled in one URB */
+static int iso_packets[8] =
+    { ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B, ISOC_PACKETS_B,
+	ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D, ISOC_PACKETS_D
+};
+
+
+/* Fifo flow Control for TX ISO */
+#define SINK_MAX	68
+#define SINK_MIN	48
+#define SINK_DMIN	12
+#define SINK_DMAX	18
+#define BITLINE_INF	(-96*8)
+
+/* HFC-S USB register access by Control-URSs */
+#define write_reg_atomic(a, b, c) \
+	usb_control_msg((a)->dev, (a)->ctrl_out_pipe, 0, 0x40, (c), (b), \
+		0, 0, HFC_CTRL_TIMEOUT)
+#define read_reg_atomic(a, b, c) \
+	usb_control_msg((a)->dev, (a)->ctrl_in_pipe, 1, 0xC0, 0, (b), (c), \
+		1, HFC_CTRL_TIMEOUT)
+#define HFC_CTRL_BUFSIZE 64
+
+struct ctrl_buf {
+	__u8 hfcs_reg;		/* register number */
+	__u8 reg_val;		/* value to be written (or read) */
+};
+
+/*
+ * URB error codes
+ * Used to represent a list of values and their respective symbolic names
+ */
+struct hfcusb_symbolic_list {
+	const int num;
+	const char *name;
+};
+
+static struct hfcusb_symbolic_list urb_errlist[] = {
+	{-ENOMEM, "No memory for allocation of internal structures"},
+	{-ENOSPC, "The host controller's bandwidth is already consumed"},
+	{-ENOENT, "URB was canceled by unlink_urb"},
+	{-EXDEV, "ISO transfer only partially completed"},
+	{-EAGAIN, "Too match scheduled for the future"},
+	{-ENXIO, "URB already queued"},
+	{-EFBIG, "Too much ISO frames requested"},
+	{-ENOSR, "Buffer error (overrun)"},
+	{-EPIPE, "Specified endpoint is stalled (device not responding)"},
+	{-EOVERFLOW, "Babble (bad cable?)"},
+	{-EPROTO, "Bit-stuff error (bad cable?)"},
+	{-EILSEQ, "CRC/Timeout"},
+	{-ETIMEDOUT, "NAK (device does not respond)"},
+	{-ESHUTDOWN, "Device unplugged"},
+	{-1, NULL}
+};
+
+static inline const char *
+symbolic(struct hfcusb_symbolic_list list[], const int num)
+{
+	int i;
+	for (i = 0; list[i].name != NULL; i++)
+		if (list[i].num == num)
+			return list[i].name;
+	return "<unkown USB Error>";
+}
+
+/* USB descriptor need to contain one of the following EndPoint combination: */
+#define CNF_4INT3ISO	1	/* 4 INT IN, 3 ISO OUT */
+#define CNF_3INT3ISO	2	/* 3 INT IN, 3 ISO OUT */
+#define CNF_4ISO3ISO	3	/* 4 ISO IN, 3 ISO OUT */
+#define CNF_3ISO3ISO	4	/* 3 ISO IN, 3 ISO OUT */
+
+#define EP_NUL 1	/* Endpoint at this position not allowed */
+#define EP_NOP 2	/* all type of endpoints allowed at this position */
+#define EP_ISO 3	/* Isochron endpoint mandatory at this position */
+#define EP_BLK 4	/* Bulk endpoint mandatory at this position */
+#define EP_INT 5	/* Interrupt endpoint mandatory at this position */
+
+#define HFC_CHAN_B1	0
+#define HFC_CHAN_B2	1
+#define HFC_CHAN_D	2
+#define HFC_CHAN_E	3
+
+
+/*
+ * List of all supported enpoints configiration sets, used to find the
+ * best matching endpoint configuration within a devices' USB descriptor.
+ * We need at least 3 RX endpoints, and 3 TX endpoints, either
+ * INT-in and ISO-out, or ISO-in and ISO-out)
+ * with 4 RX endpoints even E-Channel logging is possible
+ */
+static int
+validconf[][19] = {
+	/* INT in, ISO out config */
+	{EP_NUL, EP_INT, EP_NUL, EP_INT, EP_NUL, EP_INT, EP_NOP, EP_INT,
+	 EP_ISO, EP_NUL, EP_ISO, EP_NUL, EP_ISO, EP_NUL, EP_NUL, EP_NUL,
+	 CNF_4INT3ISO, 2, 1},
+	{EP_NUL, EP_INT, EP_NUL, EP_INT, EP_NUL, EP_INT, EP_NUL, EP_NUL,
+	 EP_ISO, EP_NUL, EP_ISO, EP_NUL, EP_ISO, EP_NUL, EP_NUL, EP_NUL,
+	 CNF_3INT3ISO, 2, 0},
+	/* ISO in, ISO out config */
+	{EP_NOP, EP_NOP, EP_NOP, EP_NOP, EP_NOP, EP_NOP, EP_NOP, EP_NOP,
+	 EP_ISO, EP_ISO, EP_ISO, EP_ISO, EP_ISO, EP_ISO, EP_NOP, EP_ISO,
+	 CNF_4ISO3ISO, 2, 1},
+	{EP_NUL, EP_NUL, EP_NUL, EP_NUL, EP_NUL, EP_NUL, EP_NUL, EP_NUL,
+	 EP_ISO, EP_ISO, EP_ISO, EP_ISO, EP_ISO, EP_ISO, EP_NUL, EP_NUL,
+	 CNF_3ISO3ISO, 2, 0},
+	{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} /* EOL element */
+};
+
+/* string description of chosen config */
+char *conf_str[] = {
+	"4 Interrupt IN + 3 Isochron OUT",
+	"3 Interrupt IN + 3 Isochron OUT",
+	"4 Isochron IN + 3 Isochron OUT",
+	"3 Isochron IN + 3 Isochron OUT"
+};
+
+
+#define LED_OFF		0	/* no LED support */
+#define LED_SCHEME1	1	/* LED standard scheme */
+#define LED_SCHEME2	2	/* not used yet... */
+
+#define LED_POWER_ON	1
+#define LED_POWER_OFF	2
+#define LED_S0_ON	3
+#define LED_S0_OFF	4
+#define LED_B1_ON	5
+#define LED_B1_OFF	6
+#define LED_B1_DATA	7
+#define LED_B2_ON	8
+#define LED_B2_OFF	9
+#define LED_B2_DATA	10
+
+#define LED_NORMAL	0	/* LEDs are normal */
+#define LED_INVERTED 	1	/* LEDs are inverted */
+
+/* time in ms to perform a Flashing LED when B-Channel has traffic */
+#define LED_TIME      250
+
+
+
+struct hfcsusb;
+struct usb_fifo;
+
+/* structure defining input+output fifos (interrupt/bulk mode) */
+struct iso_urb {
+	struct urb *urb;
+	__u8 buffer[ISO_BUFFER_SIZE];	/* buffer rx/tx USB URB data */
+	struct usb_fifo *owner_fifo;	/* pointer to owner fifo */
+	__u8 indx; /* Fifos's ISO double buffer 0 or 1 ? */
+#ifdef ISO_FRAME_START_DEBUG
+	int start_frames[ISO_FRAME_START_RING_COUNT];
+	__u8 iso_frm_strt_pos; /* index in start_frame[] */
+#endif
+};
+
+struct usb_fifo {
+	int fifonum;		/* fifo index attached to this structure */
+	int active;		/* fifo is currently active */
+	struct hfcsusb *hw;	/* pointer to main structure */
+	int pipe;		/* address of endpoint */
+	__u8 usb_packet_maxlen;	/* maximum length for usb transfer */
+	unsigned int max_size;	/* maximum size of receive/send packet */
+	__u8 intervall;		/* interrupt interval */
+	struct urb *urb;	/* transfer structure for usb routines */
+	__u8 buffer[128];	/* buffer USB INT OUT URB data */
+	int bit_line;		/* how much bits are in the fifo? */
+
+	__u8 usb_transfer_mode; /* switched between ISO and INT */
+	struct iso_urb	iso[2]; /* two urbs to have one always
+					 one pending */
+
+	struct dchannel *dch;	/* link to hfcsusb_t->dch */
+	struct bchannel *bch;	/* link to hfcsusb_t->bch */
+	struct dchannel *ech;	/* link to hfcsusb_t->ech, TODO: E-CHANNEL */
+	int last_urblen;	/* remember length of last packet */
+	__u8 stop_gracefull;	/* stops URB retransmission */
+};
+
+struct hfcsusb {
+	struct list_head	list;
+	struct dchannel		dch;
+	struct bchannel		bch[2];
+	struct dchannel		ech; /* TODO : wait for struct echannel ;) */
+
+	struct usb_device	*dev;		/* our device */
+	struct usb_interface	*intf;		/* used interface */
+	int			if_used;	/* used interface number */
+	int			alt_used;	/* used alternate config */
+	int			cfg_used;	/* configuration index used */
+	int			vend_idx;	/* index in hfcsusb_idtab */
+	int			packet_size;
+	int			iso_packet_size;
+	struct usb_fifo		fifos[HFCUSB_NUM_FIFOS];
+
+	/* control pipe background handling */
+	struct ctrl_buf		ctrl_buff[HFC_CTRL_BUFSIZE];
+	int			ctrl_in_idx, ctrl_out_idx, ctrl_cnt;
+	struct urb		*ctrl_urb;
+	struct usb_ctrlrequest	ctrl_write;
+	struct usb_ctrlrequest	ctrl_read;
+	int			ctrl_paksize;
+	int			ctrl_in_pipe, ctrl_out_pipe;
+	spinlock_t		ctrl_lock; /* lock for ctrl */
+	spinlock_t              lock;
+
+	__u8			threshold_mask;
+	__u8			led_state;
+
+	__u8			protocol;
+	int			nt_timer;
+	int			open;
+	__u8			timers;
+	__u8			initdone;
+	char			name[MISDN_MAX_IDLEN];
+};
+
+/* private vendor specific data */
+struct hfcsusb_vdata {
+	__u8		led_scheme;  /* led display scheme */
+	signed short	led_bits[8]; /* array of 8 possible LED bitmask */
+	char		*vend_name;  /* device name */
+};
+
+
+#define HFC_MAX_TE_LAYER1_STATE 8
+#define HFC_MAX_NT_LAYER1_STATE 4
+
+const char *HFC_TE_LAYER1_STATES[HFC_MAX_TE_LAYER1_STATE + 1] = {
+	"TE F0 - Reset",
+	"TE F1 - Reset",
+	"TE F2 - Sensing",
+	"TE F3 - Deactivated",
+	"TE F4 - Awaiting signal",
+	"TE F5 - Identifying input",
+	"TE F6 - Synchronized",
+	"TE F7 - Activated",
+	"TE F8 - Lost framing",
+};
+
+const char *HFC_NT_LAYER1_STATES[HFC_MAX_NT_LAYER1_STATE + 1] = {
+	"NT G0 - Reset",
+	"NT G1 - Deactive",
+	"NT G2 - Pending activation",
+	"NT G3 - Active",
+	"NT G4 - Pending deactivation",
+};
+
+/* supported devices */
+static struct usb_device_id hfcsusb_idtab[] = {
+	{
+	 USB_DEVICE(0x0959, 0x2bd0),
+	 .driver_info = (unsigned long) &((struct hfcsusb_vdata)
+			  {LED_OFF, {4, 0, 2, 1},
+			   "ISDN USB TA (Cologne Chip HFC-S USB based)"}),
+	},
+	{
+	 USB_DEVICE(0x0675, 0x1688),
+	 .driver_info = (unsigned long) &((struct hfcsusb_vdata)
+			  {LED_SCHEME1, {1, 2, 0, 0},
+			   "DrayTek miniVigor 128 USB ISDN TA"}),
+	},
+	{
+	 USB_DEVICE(0x07b0, 0x0007),
+	 .driver_info = (unsigned long) &((struct hfcsusb_vdata)
+			  {LED_SCHEME1, {0x80, -64, -32, -16},
+			   "Billion tiny USB ISDN TA 128"}),
+	},
+	{
+	 USB_DEVICE(0x0742, 0x2008),
+	 .driver_info = (unsigned long) &((struct hfcsusb_vdata)
+			  {LED_SCHEME1, {4, 0, 2, 1},
+			   "Stollmann USB TA"}),
+	},
+	{
+	 USB_DEVICE(0x0742, 0x2009),
+	 .driver_info = (unsigned long) &((struct hfcsusb_vdata)
+			  {LED_SCHEME1, {4, 0, 2, 1},
+			   "Aceex USB ISDN TA"}),
+	},
+	{
+	 USB_DEVICE(0x0742, 0x200A),
+	 .driver_info = (unsigned long) &((struct hfcsusb_vdata)
+			  {LED_SCHEME1, {4, 0, 2, 1},
+			   "OEM USB ISDN TA"}),
+	},
+	{
+	 USB_DEVICE(0x08e3, 0x0301),
+	 .driver_info = (unsigned long) &((struct hfcsusb_vdata)
+			  {LED_SCHEME1, {2, 0, 1, 4},
+			   "Olitec USB RNIS"}),
+	},
+	{
+	 USB_DEVICE(0x07fa, 0x0846),
+	 .driver_info = (unsigned long) &((struct hfcsusb_vdata)
+			  {LED_SCHEME1, {0x80, -64, -32, -16},
+			   "Bewan Modem RNIS USB"}),
+	},
+	{
+	 USB_DEVICE(0x07fa, 0x0847),
+	 .driver_info = (unsigned long) &((struct hfcsusb_vdata)
+			  {LED_SCHEME1, {0x80, -64, -32, -16},
+			   "Djinn Numeris USB"}),
+	},
+	{
+	 USB_DEVICE(0x07b0, 0x0006),
+	 .driver_info = (unsigned long) &((struct hfcsusb_vdata)
+			  {LED_SCHEME1, {0x80, -64, -32, -16},
+			   "Twister ISDN TA"}),
+	},
+	{
+	 USB_DEVICE(0x071d, 0x1005),
+	 .driver_info = (unsigned long) &((struct hfcsusb_vdata)
+			  {LED_SCHEME1, {0x02, 0, 0x01, 0x04},
+			   "Eicon DIVA USB 4.0"}),
+	},
+	{
+	 USB_DEVICE(0x0586, 0x0102),
+	 .driver_info = (unsigned long) &((struct hfcsusb_vdata)
+			  {LED_SCHEME1, {0x88, -64, -32, -16},
+			   "ZyXEL OMNI.NET USB II"}),
+	},
+	{ }
+};
+
+MODULE_DEVICE_TABLE(usb, hfcsusb_idtab);
+
+#endif	/* __HFCSUSB_H__ */