blackfin: bf60x: add serial support

Add serial for bf60x.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Signed-off-by: Sonic Zhang <sonic.adi@gmail.com>

1 files changed, 16 insertions, 206 deletions

diff --git a/arch/blackfin/cpu/serial.h b/arch/blackfin/cpu/serial.h
index 8a076dd..9200339 100644
--- a/arch/blackfin/cpu/serial.h
+++ b/arch/blackfin/cpu/serial.h
@@ -3,7 +3,7 @@
  *            any functions defined here must be always_inline since
  *            initcode cannot have function calls.
  *
- * Copyright (c) 2004-2007 Analog Devices Inc.
+ * Copyright (c) 2004-2011 Analog Devices Inc.
  *
  * Licensed under the GPL-2 or later.
  */
@@ -12,7 +12,7 @@
 #define __BFIN_CPU_SERIAL_H__
 
 #include <asm/blackfin.h>
-#include <asm/mach-common/bits/uart.h>
+#include <asm/portmux.h>
 
 #ifndef CONFIG_UART_CONSOLE
 # define CONFIG_UART_CONSOLE 0
@@ -24,88 +24,34 @@
 # define BFIN_DEBUG_EARLY_SERIAL 0
 #endif
 
-#ifndef __ASSEMBLY__
-
-#include <asm/portmux.h>
-
-#define LOB(x) ((x) & 0xFF)
-#define HIB(x) (((x) >> 8) & 0xFF)
-
-#if defined(__ADSPBF50x__) || defined(__ADSPBF54x__)
+#if defined(__ADSPBF60x__)
+# define BFIN_UART_HW_VER 4
+#elif defined(__ADSPBF50x__) || defined(__ADSPBF54x__)
 # define BFIN_UART_HW_VER 2
 #else
 # define BFIN_UART_HW_VER 1
 #endif
 
-/*
- * All Blackfin system MMRs are padded to 32bits even if the register
- * itself is only 16bits.  So use a helper macro to streamline this.
- */
-#define __BFP(m) u16 m; u16 __pad_##m
-struct bfin_mmr_serial {
-#if BFIN_UART_HW_VER == 2
-	__BFP(dll);
-	__BFP(dlh);
-	__BFP(gctl);
-	__BFP(lcr);
-	__BFP(mcr);
-	__BFP(lsr);
-	__BFP(msr);
-	__BFP(scr);
-	__BFP(ier_set);
-	__BFP(ier_clear);
-	__BFP(thr);
-	__BFP(rbr);
-#else
-	union {
-		u16 dll;
-		u16 thr;
-		const u16 rbr;
-	};
-	const u16 __spad0;
-	union {
-		u16 dlh;
-		u16 ier;
-	};
-	const u16 __spad1;
-	const __BFP(iir);
-	__BFP(lcr);
-	__BFP(mcr);
-	__BFP(lsr);
-	__BFP(msr);
-	__BFP(scr);
-	const u32 __spad2;
-	__BFP(gctl);
-#endif
-};
-#undef __BFP
-
 #define __PASTE_UART(num, pfx, sfx) pfx##num##_##sfx
 #define _PASTE_UART(num, pfx, sfx) __PASTE_UART(num, pfx, sfx)
-#define MMR_UART(n) _PASTE_UART(n, UART, DLL)
 #define _P_UART(n, pin) _PASTE_UART(n, P_UART, pin)
 #define P_UART(pin) _P_UART(CONFIG_UART_CONSOLE, pin)
 
-#ifndef UART_DLL
-# define UART_DLL MMR_UART(CONFIG_UART_CONSOLE)
-#else
-# define UART0_DLL UART_DLL
-# if CONFIG_UART_CONSOLE != 0
-#  error CONFIG_UART_CONSOLE must be 0 on parts with only one UART
-# endif
-#endif
 #define pUART ((volatile struct bfin_mmr_serial *)uart_base)
 
-#if BFIN_UART_HW_VER == 2
-# define ACCESS_LATCH()
-# define ACCESS_PORT_IER()
+#ifndef __ASSEMBLY__
+__attribute__((always_inline))
+static inline void serial_do_portmux(void);
+#endif
+
+#if BFIN_UART_HW_VER < 4
+# include "serial1.h"
 #else
-# define ACCESS_LATCH() \
-	bfin_write(&pUART->lcr, bfin_read(&pUART->lcr) | DLAB)
-# define ACCESS_PORT_IER() \
-	bfin_write(&pUART->lcr, bfin_read(&pUART->lcr) & ~DLAB)
+# include "serial4.h"
 #endif
 
+#ifndef __ASSEMBLY__
+
 __attribute__((always_inline))
 static inline void serial_do_portmux(void)
 {
@@ -115,143 +61,7 @@ static inline void serial_do_portmux(void)
 		return;
 	}
 
-#if defined(__ADSPBF50x__)
-# define DO_MUX(port, mux_tx, mux_rx, tx, rx) \
-	bfin_write_PORT##port##_MUX((bfin_read_PORT##port##_MUX() & ~(PORT_x_MUX_##mux_tx##_MASK | PORT_x_MUX_##mux_rx##_MASK)) | PORT_x_MUX_##mux_tx##_FUNC_1 | PORT_x_MUX_##mux_rx##_FUNC_1); \
-	bfin_write_PORT##port##_FER(bfin_read_PORT##port##_FER() | P##port##tx | P##port##rx);
-	switch (CONFIG_UART_CONSOLE) {
-	case 0: DO_MUX(G, 7, 7, 12, 13); break;	/* Port G; mux 7; PG12 and PG13 */
-	case 1: DO_MUX(F, 3, 3, 6, 7);   break;	/* Port F; mux 3; PF6 and PF7 */
-	}
-	SSYNC();
-#elif defined(__ADSPBF51x__)
-# define DO_MUX(port, mux_tx, mux_rx, tx, rx) \
-	bfin_write_PORT##port##_MUX((bfin_read_PORT##port##_MUX() & ~(PORT_x_MUX_##mux_tx##_MASK | PORT_x_MUX_##mux_rx##_MASK)) | PORT_x_MUX_##mux_tx##_FUNC_2 | PORT_x_MUX_##mux_rx##_FUNC_2); \
-	bfin_write_PORT##port##_FER(bfin_read_PORT##port##_FER() | P##port##tx | P##port##rx);
-	switch (CONFIG_UART_CONSOLE) {
-	case 0: DO_MUX(G, 5, 5, 9, 10);  break;	/* Port G; mux 5; PG9 and PG10 */
-	case 1: DO_MUX(F, 2, 3, 14, 15); break;	/* Port H; mux 2/3; PH14 and PH15 */
-	}
-	SSYNC();
-#elif defined(__ADSPBF52x__)
-# define DO_MUX(port, mux, tx, rx) \
-	bfin_write_PORT##port##_MUX((bfin_read_PORT##port##_MUX() & ~PORT_x_MUX_##mux##_MASK) | PORT_x_MUX_##mux##_FUNC_3); \
-	bfin_write_PORT##port##_FER(bfin_read_PORT##port##_FER() | P##port##tx | P##port##rx);
-	switch (CONFIG_UART_CONSOLE) {
-	case 0: DO_MUX(G, 2, 7, 8);   break;	/* Port G; mux 2; PG2 and PG8 */
-	case 1: DO_MUX(F, 5, 14, 15); break;	/* Port F; mux 5; PF14 and PF15 */
-	}
-	SSYNC();
-#elif defined(__ADSPBF537__) || defined(__ADSPBF536__) || defined(__ADSPBF534__)
-	const uint16_t func[] = { PFDE, PFTE, };
-	bfin_write_PORT_MUX(bfin_read_PORT_MUX() & ~func[CONFIG_UART_CONSOLE]);
-	bfin_write_PORTF_FER(bfin_read_PORTF_FER() |
-	                     (1 << P_IDENT(P_UART(RX))) |
-	                     (1 << P_IDENT(P_UART(TX))));
-	SSYNC();
-#elif defined(__ADSPBF54x__)
-# define DO_MUX(port, tx, rx) \
-	bfin_write_PORT##port##_MUX((bfin_read_PORT##port##_MUX() & ~(PORT_x_MUX_##tx##_MASK | PORT_x_MUX_##rx##_MASK)) | PORT_x_MUX_##tx##_FUNC_1 | PORT_x_MUX_##rx##_FUNC_1); \
-	bfin_write_PORT##port##_FER(bfin_read_PORT##port##_FER() | P##port##tx | P##port##rx);
-	switch (CONFIG_UART_CONSOLE) {
-	case 0: DO_MUX(E, 7, 8); break;	/* Port E; PE7 and PE8 */
-	case 1: DO_MUX(H, 0, 1); break;	/* Port H; PH0 and PH1 */
-	case 2: DO_MUX(B, 4, 5); break;	/* Port B; PB4 and PB5 */
-	case 3: DO_MUX(B, 6, 7); break;	/* Port B; PB6 and PB7 */
-	}
-	SSYNC();
-#elif defined(__ADSPBF561__)
-	/* UART pins could be GPIO, but they aren't pin muxed.  */
-#else
-# if (P_UART(RX) & P_DEFINED) || (P_UART(TX) & P_DEFINED)
-#  error "missing portmux logic for UART"
-# endif
-#endif
-}
-
-__attribute__((always_inline))
-static inline int uart_init(uint32_t uart_base)
-{
-	/* always enable UART -- avoids anomalies 05000309 and 05000350 */
-	bfin_write(&pUART->gctl, UCEN);
-
-	/* Set LCR to Word Lengh 8-bit word select */
-	bfin_write(&pUART->lcr, WLS_8);
-
-	SSYNC();
-
-	return 0;
-}
-
-__attribute__((always_inline))
-static inline int serial_early_init(uint32_t uart_base)
-{
-	/* handle portmux crap on different Blackfins */
-	serial_do_portmux();
-
-	return uart_init(uart_base);
-}
-
-__attribute__((always_inline))
-static inline int serial_early_uninit(uint32_t uart_base)
-{
-	/* disable the UART by clearing UCEN */
-	bfin_write(&pUART->gctl, 0);
-
-	return 0;
-}
-
-__attribute__((always_inline))
-static inline void serial_early_put_div(uint32_t uart_base, uint16_t divisor)
-{
-	/* Set DLAB in LCR to Access DLL and DLH */
-	ACCESS_LATCH();
-	SSYNC();
-
-	/* Program the divisor to get the baud rate we want */
-	bfin_write(&pUART->dll, LOB(divisor));
-	bfin_write(&pUART->dlh, HIB(divisor));
-	SSYNC();
-
-	/* Clear DLAB in LCR to Access THR RBR IER */
-	ACCESS_PORT_IER();
-	SSYNC();
-}
-
-__attribute__((always_inline))
-static inline uint16_t serial_early_get_div(void)
-{
-	uint32_t uart_base = UART_DLL;
-
-	/* Set DLAB in LCR to Access DLL and DLH */
-	ACCESS_LATCH();
-	SSYNC();
-
-	uint8_t dll = bfin_read(&pUART->dll);
-	uint8_t dlh = bfin_read(&pUART->dlh);
-	uint16_t divisor = (dlh << 8) | dll;
-
-	/* Clear DLAB in LCR to Access THR RBR IER */
-	ACCESS_PORT_IER();
-	SSYNC();
-
-	return divisor;
-}
-
-/* We cannot use get_sclk() early on as it uses caches in external memory */
-#if defined(BFIN_IN_INITCODE) || defined(CONFIG_DEBUG_EARLY_SERIAL)
-# define get_sclk() (CONFIG_CLKIN_HZ * CONFIG_VCO_MULT / CONFIG_SCLK_DIV)
-#endif
-
-__attribute__((always_inline))
-static inline void serial_early_set_baud(uint32_t uart_base, uint32_t baud)
-{
-	/* Translate from baud into divisor in terms of SCLK.  The
-	 * weird multiplication is to make sure we over sample just
-	 * a little rather than under sample the incoming signals.
-	 */
-	serial_early_put_div(uart_base,
-		(get_sclk() + (baud * 8)) / (baud * 16) - ANOMALY_05000230);
+	serial_early_do_portmux();
 }
 
 #ifndef BFIN_IN_INITCODE