diff options
author | Daisuke Nojiri <dnojiri@chromium.org> | 2015-01-23 10:02:24 -0800 |
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committer | Patrick Georgi <pgeorgi@google.com> | 2015-04-20 18:43:28 +0200 |
commit | c047b107ec138b72f5a4671ba6eb3acd96eaa065 (patch) | |
tree | fe6fff15b53e5a82074d3d3bb138eb7ebdecb8b6 /src/soc/broadcom/cygnus/include | |
parent | 3a2ac88e4052d8ec513ff5d54882f1885fd6ad36 (diff) | |
download | coreboot-c047b107ec138b72f5a4671ba6eb3acd96eaa065.tar.xz |
purin: add ns16550 driver
BUG=chrome-os-partner:35807
BRANCH=broadcom-firmware
TEST=booted b0 board. messages printed on console:
coreboot-bcf5dc0-dirty bootblock Mon Feb 9 13:33:55 PST 2015 starting...
Exception handlers installed.
Change-Id: I271ead2f4fe48b809fd311acd5a27a675dce549e
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: ddff8fb170e775a121150fce065410d2925ad18c
Original-Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Original-Change-Id: Ia6e82fa89547d61745c1473f723897dc3c1296ef
Original-Reviewed-on: https://chromium-review.googlesource.com/251301
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: http://review.coreboot.org/9765
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
Diffstat (limited to 'src/soc/broadcom/cygnus/include')
-rw-r--r-- | src/soc/broadcom/cygnus/include/soc/ns16550.h | 133 |
1 files changed, 51 insertions, 82 deletions
diff --git a/src/soc/broadcom/cygnus/include/soc/ns16550.h b/src/soc/broadcom/cygnus/include/soc/ns16550.h index 51cb5b4a66..12e53c1605 100644 --- a/src/soc/broadcom/cygnus/include/soc/ns16550.h +++ b/src/soc/broadcom/cygnus/include/soc/ns16550.h @@ -1,81 +1,61 @@ /* - * NS16550 Serial Port - * originally from linux source (arch/powerpc/boot/ns16550.h) + * This file is part of the coreboot project. * - * Cleanup and unification - * (C) 2009 by Detlev Zundel, DENX Software Engineering GmbH + * Copyright (C) 2000 Flying Pig Systems + * Copyright (C) 2005 Wind River Systems + * Copyright (C) 2009 DENX Software Engineering GmbH + * Copyright (C) 2015 Google Inc. * - * modified slightly to - * have addresses as offsets from CONFIG_SYS_ISA_BASE - * added a few more definitions - * added prototypes for ns16550.c - * reduced no of com ports to 2 - * modifications (c) Rob Taylor, Flying Pig Systems. 2000. + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. * - * added support for port on 64-bit bus - * by Richard Danter (richard.danter@windriver.com), (C) 2005 Wind River Systems - */ - -/* - * Note that the following macro magic uses the fact that the compiler - * will not allocate storage for arrays of size 0 + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ -#include <linux/types.h> - -#if !defined(CONFIG_SYS_NS16550_REG_SIZE) || (CONFIG_SYS_NS16550_REG_SIZE == 0) -#error "Please define NS16550 registers size." -#elif defined(CONFIG_SYS_NS16550_MEM32) -#define UART_REG(x) u32 x -#elif (CONFIG_SYS_NS16550_REG_SIZE > 0) -#define UART_REG(x) \ - unsigned char prepad_##x[CONFIG_SYS_NS16550_REG_SIZE - 1]; \ - unsigned char x; -#elif (CONFIG_SYS_NS16550_REG_SIZE < 0) -#define UART_REG(x) \ - unsigned char x; \ - unsigned char postpad_##x[-CONFIG_SYS_NS16550_REG_SIZE - 1]; -#endif - -struct NS16550 { - UART_REG(rbr); /* 0 */ - UART_REG(ier); /* 1 */ - UART_REG(fcr); /* 2 */ - UART_REG(lcr); /* 3 */ - UART_REG(mcr); /* 4 */ - UART_REG(lsr); /* 5 */ - UART_REG(msr); /* 6 */ - UART_REG(spr); /* 7 */ -#ifdef CONFIG_SOC_DA8XX - UART_REG(reg8); /* 8 */ - UART_REG(reg9); /* 9 */ - UART_REG(revid1); /* A */ - UART_REG(revid2); /* B */ - UART_REG(pwr_mgmt); /* C */ - UART_REG(mdr1); /* D */ -#else - UART_REG(mdr1); /* 8 */ - UART_REG(reg9); /* 9 */ - UART_REG(regA); /* A */ - UART_REG(regB); /* B */ - UART_REG(regC); /* C */ - UART_REG(regD); /* D */ - UART_REG(regE); /* E */ - UART_REG(uasr); /* F */ - UART_REG(scr); /* 10*/ - UART_REG(ssr); /* 11*/ - UART_REG(reg12); /* 12*/ - UART_REG(osc_12m_sel); /* 13*/ -#endif +#include <stdint.h> + +struct ns16550 { + union { + uint32_t thr; /* Transmit holding register. */ + uint32_t rbr; /* Receive buffer register. */ + uint32_t dll; /* Divisor latch lsb. */ + }; + union { + uint32_t ier; /* Interrupt enable register. */ + uint32_t dlm; /* Divisor latch msb. */ + }; + union { + uint32_t iir; /* Interrupt identification register. */ + uint32_t fcr; /* FIFO control register. */ + }; + uint32_t lcr; /* 3 */ + uint32_t mcr; /* 4 */ + uint32_t lsr; /* 5 */ + uint32_t msr; /* 6 */ + uint32_t spr; /* 7 */ + uint32_t mdr1; /* 8 */ + uint32_t reg9; /* 9 */ + uint32_t regA; /* A */ + uint32_t regB; /* B */ + uint32_t regC; /* C */ + uint32_t regD; /* D */ + uint32_t regE; /* E */ + uint32_t uasr; /* F */ + uint32_t scr; /* 10*/ + uint32_t ssr; /* 11*/ + uint32_t reg12; /* 12*/ + uint32_t osc_12m_sel; /* 13*/ }; -#define thr rbr -#define iir fcr -#define dll rbr -#define dlm ier - -typedef struct NS16550 *NS16550_t; - /* * These are the definitions for the FIFO Control Register */ @@ -163,16 +143,5 @@ typedef struct NS16550 *NS16550_t; #define UART_IER_THRI 0x02 /* Enable Transmitter holding register int. */ #define UART_IER_RDI 0x01 /* Enable receiver data interrupt */ - -#ifdef CONFIG_OMAP1510 -#define OSC_12M_SEL 0x01 /* selects 6.5 * current clk div */ -#endif - -/* useful defaults for LCR */ +/* useful defaults for LCR: 8 data, 1 stop, no parity */ #define UART_LCR_8N1 0x03 - -void NS16550_init(NS16550_t com_port, int baud_divisor); -void NS16550_putc(NS16550_t com_port, char c); -char NS16550_getc(NS16550_t com_port); -int NS16550_tstc(NS16550_t com_port); -void NS16550_reinit(NS16550_t com_port, int baud_divisor); |