Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 262 insertions, 0 deletions

diff --git a/include/asm-v850/v850e_uartb.h b/include/asm-v850/v850e_uartb.h
new file mode 100644
index 000000000000..6d4767d5a835
--- /dev/null
+++ b/include/asm-v850/v850e_uartb.h
@@ -0,0 +1,262 @@
+/*
+ * include/asm-v850/v850e_uartb.h -- V850E on-chip `UARTB' UART
+ *
+ *  Copyright (C) 2001,02,03  NEC Electronics Corporation
+ *  Copyright (C) 2001,02,03  Miles Bader <miles@gnu.org>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License.  See the file COPYING in the main directory of this
+ * archive for more details.
+ *
+ * Written by Miles Bader <miles@gnu.org>
+ */
+
+/* The V850E UARTB is basically a superset of the original V850E UART, but
+   even where it's the same, the names and details have changed a bit.
+   It's similar enough to use the same driver (v850e_uart.c), but the
+   details have been abstracted slightly to do so.  */
+
+#ifndef __V850_V850E_UARTB_H__
+#define __V850_V850E_UARTB_H__
+
+
+/* Raw hardware interface.  */
+
+#define V850E_UARTB_BASE_ADDR(n)	(0xFFFFFA00 + 0x10 * (n))
+
+/* Addresses of specific UART control registers for channel N.  */
+#define V850E_UARTB_CTL0_ADDR(n)	(V850E_UARTB_BASE_ADDR(n) + 0x0)
+#define V850E_UARTB_CTL2_ADDR(n)	(V850E_UARTB_BASE_ADDR(n) + 0x2)
+#define V850E_UARTB_STR_ADDR(n)		(V850E_UARTB_BASE_ADDR(n) + 0x4)
+#define V850E_UARTB_RX_ADDR(n)		(V850E_UARTB_BASE_ADDR(n) + 0x6)
+#define V850E_UARTB_RXAP_ADDR(n)	(V850E_UARTB_BASE_ADDR(n) + 0x6)
+#define V850E_UARTB_TX_ADDR(n)		(V850E_UARTB_BASE_ADDR(n) + 0x8)
+#define V850E_UARTB_FIC0_ADDR(n)	(V850E_UARTB_BASE_ADDR(n) + 0xA)
+#define V850E_UARTB_FIC1_ADDR(n)	(V850E_UARTB_BASE_ADDR(n) + 0xB)
+#define V850E_UARTB_FIC2_ADDR(n)	(V850E_UARTB_BASE_ADDR(n) + 0xC)
+#define V850E_UARTB_FIS0_ADDR(n)	(V850E_UARTB_BASE_ADDR(n) + 0xE)
+#define V850E_UARTB_FIS1_ADDR(n)	(V850E_UARTB_BASE_ADDR(n) + 0xF)
+
+/* UARTB control register 0 (general config).  */
+#define V850E_UARTB_CTL0(n)	(*(volatile u8 *)V850E_UARTB_CTL0_ADDR(n))
+/* Control bits for config registers.  */
+#define V850E_UARTB_CTL0_PWR		0x80	/* clock enable */
+#define V850E_UARTB_CTL0_TXE		0x40	/* transmit enable */
+#define V850E_UARTB_CTL0_RXE		0x20	/* receive enable */
+#define V850E_UARTB_CTL0_DIR		0x10	/*  */
+#define V850E_UARTB_CTL0_PS1		0x08	/* parity */
+#define V850E_UARTB_CTL0_PS0		0x04	/* parity */
+#define V850E_UARTB_CTL0_CL		0x02	/* char len 1:8bit, 0:7bit */
+#define V850E_UARTB_CTL0_SL		0x01	/* stop bit 1:2bit, 0:1bit */
+#define V850E_UARTB_CTL0_PS_MASK	0x0C	/* mask covering parity bits */
+#define V850E_UARTB_CTL0_PS_NONE	0x00	/* no parity */
+#define V850E_UARTB_CTL0_PS_ZERO	0x04	/* zero parity */
+#define V850E_UARTB_CTL0_PS_ODD		0x08	/* odd parity */
+#define V850E_UARTB_CTL0_PS_EVEN	0x0C	/* even parity */
+#define V850E_UARTB_CTL0_CL_8		0x02	/* char len 1:8bit, 0:7bit */
+#define V850E_UARTB_CTL0_SL_2		0x01	/* stop bit 1:2bit, 0:1bit */
+
+/* UARTB control register 2 (clock divider).  */
+#define V850E_UARTB_CTL2(n)	(*(volatile u16 *)V850E_UARTB_CTL2_ADDR(n))
+#define V850E_UARTB_CTL2_MIN	4
+#define V850E_UARTB_CTL2_MAX	0xFFFF
+
+/* UARTB serial interface status register.  */
+#define V850E_UARTB_STR(n)	(*(volatile u8 *)V850E_UARTB_STR_ADDR(n))
+/* Control bits for status registers.  */
+#define V850E_UARTB_STR_TSF	0x80	/* UBTX or FIFO exist data  */
+#define V850E_UARTB_STR_OVF	0x08	/* overflow error */
+#define V850E_UARTB_STR_PE	0x04	/* parity error */
+#define V850E_UARTB_STR_FE	0x02	/* framing error */
+#define V850E_UARTB_STR_OVE	0x01	/* overrun error */
+
+/* UARTB receive data register.  */
+#define V850E_UARTB_RX(n)	(*(volatile u8 *)V850E_UARTB_RX_ADDR(n))
+#define V850E_UARTB_RXAP(n)	(*(volatile u16 *)V850E_UARTB_RXAP_ADDR(n))
+/* Control bits for status registers.  */
+#define V850E_UARTB_RXAP_PEF	0x0200 /* parity error */
+#define V850E_UARTB_RXAP_FEF	0x0100 /* framing error */
+
+/* UARTB transmit data register.  */
+#define V850E_UARTB_TX(n)	(*(volatile u8 *)V850E_UARTB_TX_ADDR(n))
+
+/* UARTB FIFO control register 0.  */
+#define V850E_UARTB_FIC0(n)	(*(volatile u8 *)V850E_UARTB_FIC0_ADDR(n))
+
+/* UARTB FIFO control register 1.  */
+#define V850E_UARTB_FIC1(n)	(*(volatile u8 *)V850E_UARTB_FIC1_ADDR(n))
+
+/* UARTB FIFO control register 2.  */
+#define V850E_UARTB_FIC2(n)	(*(volatile u16 *)V850E_UARTB_FIC2_ADDR(n))
+
+/* UARTB FIFO status register 0.  */
+#define V850E_UARTB_FIS0(n)	(*(volatile u8 *)V850E_UARTB_FIS0_ADDR(n))
+
+/* UARTB FIFO status register 1.  */
+#define V850E_UARTB_FIS1(n)	(*(volatile u8 *)V850E_UARTB_FIS1_ADDR(n))
+
+
+/* Slightly abstract interface used by driver.  */
+
+
+/* Interrupts used by the UART.  */
+
+/* Received when the most recently transmitted character has been sent.  */
+#define V850E_UART_TX_IRQ(chan)		IRQ_INTUBTIT (chan)
+/* Received when a new character has been received.  */
+#define V850E_UART_RX_IRQ(chan)		IRQ_INTUBTIR (chan)
+
+/* Use by serial driver for information purposes.  */
+#define V850E_UART_BASE_ADDR(chan)	V850E_UARTB_BASE_ADDR(chan)
+
+
+/* UART clock generator interface.  */
+
+/* This type encapsulates a particular uart frequency.  */
+typedef u16 v850e_uart_speed_t;
+
+/* Calculate a uart speed from BAUD for this uart.  */
+static inline v850e_uart_speed_t v850e_uart_calc_speed (unsigned baud)
+{
+	v850e_uart_speed_t speed;
+
+	/*
+	 * V850E/ME2 UARTB baud rate is determined by the value of UBCTL2
+	 * fx = V850E_UARTB_BASE_FREQ = CPU_CLOCK_FREQ/4
+	 * baud = fx / 2*speed   [ speed >= 4 ]
+	 */
+	speed = V850E_UARTB_CTL2_MIN;
+	while (((V850E_UARTB_BASE_FREQ / 2) / speed ) > baud)
+		speed++;
+
+	return speed;
+}
+
+/* Return the current speed of uart channel CHAN.  */
+#define v850e_uart_speed(chan)		    V850E_UARTB_CTL2 (chan)
+
+/* Set the current speed of uart channel CHAN.  */
+#define v850e_uart_set_speed(chan, speed)   (V850E_UARTB_CTL2 (chan) = (speed))
+
+/* Return true if SPEED1 and SPEED2 are the same.  */
+#define v850e_uart_speed_eq(speed1, speed2) ((speed1) == (speed2))
+
+/* Minimum baud rate possible.  */
+#define v850e_uart_min_baud() \
+   ((V850E_UARTB_BASE_FREQ / 2) / V850E_UARTB_CTL2_MAX)
+
+/* Maximum baud rate possible.  The error is quite high at max, though.  */
+#define v850e_uart_max_baud() \
+   ((V850E_UARTB_BASE_FREQ / 2) / V850E_UARTB_CTL2_MIN)
+
+/* The `maximum' clock rate the uart can used, which is wanted (though not
+   really used in any useful way) by the serial framework.  */
+#define v850e_uart_max_clock() \
+   (V850E_UARTB_BASE_FREQ / 2)
+
+
+/* UART configuration interface.  */
+
+/* Type of the uart config register; must be a scalar.  */
+typedef u16 v850e_uart_config_t;
+
+/* The uart hardware config register for channel CHAN.  */
+#define V850E_UART_CONFIG(chan)		V850E_UARTB_CTL0 (chan)
+
+/* This config bit set if the uart is enabled.  */
+#define V850E_UART_CONFIG_ENABLED	V850E_UARTB_CTL0_PWR
+/* If the uart _isn't_ enabled, store this value to it to do so.  */
+#define V850E_UART_CONFIG_INIT		V850E_UARTB_CTL0_PWR
+/* Store this config value to disable the uart channel completely.  */
+#define V850E_UART_CONFIG_FINI		0
+
+/* Setting/clearing these bits enable/disable TX/RX, respectively (but
+   otherwise generally leave things running).  */
+#define V850E_UART_CONFIG_RX_ENABLE	V850E_UARTB_CTL0_RXE
+#define V850E_UART_CONFIG_TX_ENABLE	V850E_UARTB_CTL0_TXE
+
+/* These masks define which config bits affect TX/RX modes, respectively.  */
+#define V850E_UART_CONFIG_RX_BITS \
+  (V850E_UARTB_CTL0_PS_MASK | V850E_UARTB_CTL0_CL_8)
+#define V850E_UART_CONFIG_TX_BITS \
+  (V850E_UARTB_CTL0_PS_MASK | V850E_UARTB_CTL0_CL_8 | V850E_UARTB_CTL0_SL_2)
+
+static inline v850e_uart_config_t v850e_uart_calc_config (unsigned cflags)
+{
+	v850e_uart_config_t config = 0;
+
+	/* Figure out new configuration of control register.  */
+	if (cflags & CSTOPB)
+		/* Number of stop bits, 1 or 2.  */
+		config |= V850E_UARTB_CTL0_SL_2;
+	if ((cflags & CSIZE) == CS8)
+		/* Number of data bits, 7 or 8.  */
+		config |= V850E_UARTB_CTL0_CL_8;
+	if (! (cflags & PARENB))
+		/* No parity check/generation.  */
+		config |= V850E_UARTB_CTL0_PS_NONE;
+	else if (cflags & PARODD)
+		/* Odd parity check/generation.  */
+		config |= V850E_UARTB_CTL0_PS_ODD;
+	else
+		/* Even parity check/generation.  */
+		config |= V850E_UARTB_CTL0_PS_EVEN;
+	if (cflags & CREAD)
+		/* Reading enabled.  */
+		config |= V850E_UARTB_CTL0_RXE;
+
+	config |= V850E_UARTB_CTL0_PWR;
+	config |= V850E_UARTB_CTL0_TXE; /* Writing is always enabled.  */
+	config |= V850E_UARTB_CTL0_DIR; /* LSB first.  */
+
+	return config;
+}
+
+/* This should delay as long as necessary for a recently written config
+   setting to settle, before we turn the uart back on.  */
+static inline void
+v850e_uart_config_delay (v850e_uart_config_t config, v850e_uart_speed_t speed)
+{
+	/* The UART may not be reset properly unless we wait at least 2
+	   `basic-clocks' until turning on the TXE/RXE bits again.
+	   A `basic clock' is the clock used by the baud-rate generator,
+	   i.e., the cpu clock divided by the 2^new_clk_divlog2.
+	   The loop takes 2 insns, so loop CYCLES / 2 times.  */
+	register unsigned count = 1 << speed;
+	while (--count != 0)
+		/* nothing */;
+}
+
+
+/* RX/TX interface.  */
+
+/* Return true if all characters awaiting transmission on uart channel N
+   have been transmitted.  */
+#define v850e_uart_xmit_done(n)						      \
+   (! (V850E_UARTB_STR(n) & V850E_UARTB_STR_TSF))
+/* Wait for this to be true.  */
+#define v850e_uart_wait_for_xmit_done(n)				      \
+   do { } while (! v850e_uart_xmit_done (n))
+
+/* Return true if uart channel N is ready to transmit a character.  */
+#define v850e_uart_xmit_ok(n)						      \
+   (v850e_uart_xmit_done(n) && v850e_uart_cts(n))
+/* Wait for this to be true.  */
+#define v850e_uart_wait_for_xmit_ok(n)					      \
+   do { } while (! v850e_uart_xmit_ok (n))
+
+/* Write character CH to uart channel CHAN.  */
+#define v850e_uart_putc(chan, ch)	(V850E_UARTB_TX(chan) = (ch))
+
+/* Return latest character read on channel CHAN.  */
+#define v850e_uart_getc(chan)		V850E_UARTB_RX (chan)
+
+/* Return bit-mask of uart error status.  */
+#define v850e_uart_err(chan)		V850E_UARTB_STR (chan)
+/* Various error bits set in the error result.  */
+#define V850E_UART_ERR_OVERRUN		V850E_UARTB_STR_OVE
+#define V850E_UART_ERR_FRAME		V850E_UARTB_STR_FE
+#define V850E_UART_ERR_PARITY		V850E_UARTB_STR_PE
+
+
+#endif /* __V850_V850E_UARTB_H__ */