* 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.
*/
#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
# define BFIN_DEBUG_EARLY_SERIAL 0
#endif
-#ifndef __ASSEMBLY__
+#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
-#include <asm/portmux.h>
+#define __PASTE_UART(num, pfx, sfx) pfx##num##_##sfx
+#define _PASTE_UART(num, pfx, sfx) __PASTE_UART(num, pfx, sfx)
+#define _P_UART(n, pin) _PASTE_UART(n, P_UART, pin)
+#define P_UART(pin) _P_UART(CONFIG_UART_CONSOLE, pin)
-#define LOB(x) ((x) & 0xFF)
-#define HIB(x) (((x) >> 8) & 0xFF)
+#define pUART ((volatile struct bfin_mmr_serial *)uart_base)
-/*
- * 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 {
-#ifdef __ADSPBF54x__
- __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);
+#ifndef __ASSEMBLY__
+__attribute__((always_inline))
+static inline void serial_do_portmux(void);
#endif
-};
-#undef __BFP
-#ifndef UART_LSR
-# if (CONFIG_UART_CONSOLE == 3)
-# define UART_BASE UART3_DLL
-# elif (CONFIG_UART_CONSOLE == 2)
-# define UART_BASE UART2_DLL
-# elif (CONFIG_UART_CONSOLE == 1)
-# define UART_BASE UART1_DLL
-# elif (CONFIG_UART_CONSOLE == 0)
-# define UART_BASE UART0_DLL
-# endif
+#if BFIN_UART_HW_VER < 4
+# include "serial1.h"
#else
-# if CONFIG_UART_CONSOLE != 0
-# error CONFIG_UART_CONSOLE must be 0 on parts with only one UART
-# endif
-# define UART_BASE UART_DLL
+# include "serial4.h"
#endif
-#define pUART ((volatile struct bfin_mmr_serial *)UART_BASE)
-#ifdef __ADSPBF54x__
-# define ACCESS_LATCH()
-# define ACCESS_PORT_IER()
-#else
-# define ACCESS_LATCH() \
- bfin_write16(&pUART->lcr, bfin_read16(&pUART->lcr) | DLAB)
-# define ACCESS_PORT_IER() \
- bfin_write16(&pUART->lcr, bfin_read16(&pUART->lcr) & ~DLAB)
-#endif
+#ifndef __ASSEMBLY__
__attribute__((always_inline))
static inline void serial_do_portmux(void)
{
if (!BFIN_DEBUG_EARLY_SERIAL) {
- const unsigned short pins[] = {
-#if CONFIG_UART_CONSOLE == 0
- P_UART0_TX, P_UART0_RX,
-#elif CONFIG_UART_CONSOLE == 1
- P_UART1_TX, P_UART1_RX,
-#elif CONFIG_UART_CONSOLE == 2
- P_UART2_TX, P_UART2_RX,
-#elif CONFIG_UART_CONSOLE == 3
- P_UART3_TX, P_UART3_RX,
-#endif
- 0,
- };
+ const unsigned short pins[] = { P_UART(RX), P_UART(TX), 0, };
peripheral_request_list(pins, "bfin-uart");
return;
}
-#if 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__)
-# define DO_MUX(func, tx, rx) \
- bfin_write_PORT_MUX(bfin_read_PORT_MUX() & ~(func)); \
- bfin_write_PORTF_FER(bfin_read_PORTF_FER() | PF##tx | PF##rx);
- switch (CONFIG_UART_CONSOLE) {
- case 0: DO_MUX(PFDE, 0, 1); break;
- case 1: DO_MUX(PFTE, 2, 3); break;
- }
- 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();
-#endif
-}
-
-__attribute__((always_inline))
-static inline void serial_early_init(void)
-{
- /* handle portmux crap on different Blackfins */
- serial_do_portmux();
-
- /* always enable UART -- avoids anomalies 05000309 and 05000350 */
- bfin_write16(&pUART->gctl, UCEN);
-
- /* Set LCR to Word Lengh 8-bit word select */
- bfin_write16(&pUART->lcr, WLS_8);
-
- SSYNC();
-}
-
-__attribute__((always_inline))
-static inline void serial_early_put_div(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_write16(&pUART->dll, LOB(divisor));
- bfin_write16(&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)
-{
- /* Set DLAB in LCR to Access DLL and DLH */
- ACCESS_LATCH();
- SSYNC();
-
- uint8_t dll = bfin_read16(&pUART->dll);
- uint8_t dlh = bfin_read16(&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 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((get_sclk() + (baud * 8)) / (baud * 16) - ANOMALY_05000230);
+ serial_early_do_portmux();
}
#ifndef BFIN_IN_INITCODE
*/
#ifdef CONFIG_DEBUG_EARLY_SERIAL
# define serial_early_puts(str) \
- call _get_pc; \
- jump 1f; \
+ .section .rodata; \
+ 7: \
.ascii "Early:"; \
.ascii __FILE__; \
.ascii ": "; \
.ascii str; \
.asciz "\n"; \
- .align 4; \
-1: \
- R0 += 2; \
+ .previous; \
+ R0.L = 7b; \
+ R0.H = 7b; \
call _serial_puts;
#else
# define serial_early_puts(str)
projects / oweals / u-boot.git / blobdiff