/* Serialport functions for debugging * * Copyright (c) 2000 Axis Communications AB * * Authors: Bjorn Wesen * * Exports: * console_print_etrax(char *buf) * int getDebugChar() * putDebugChar(int) * enableDebugIRQ() * init_etrax_debug() * * $Log: debugport.c,v $ * Revision 1.14 2004/05/17 13:11:29 starvik * Disable DMA until real serial driver is up * * Revision 1.13 2004/05/14 07:58:01 starvik * Merge of changes from 2.4 * * Revision 1.12 2003/09/11 07:29:49 starvik * Merge of Linux 2.6.0-test5 * * Revision 1.11 2003/07/07 09:53:36 starvik * Revert all the 2.5.74 merge changes to make the console work again * * Revision 1.9 2003/02/17 17:07:23 starvik * Solved the problem with corrupted debug output (from Linux 2.4) * * Wait until DMA, FIFO and pipe is empty before and after transmissions * * Buffer data until a FIFO flush can be triggered. * * Revision 1.8 2003/01/22 06:48:36 starvik * Fixed warnings issued by GCC 3.2.1 * * Revision 1.7 2002/12/12 08:26:32 starvik * Don't use C-comments inside CVS comments * * Revision 1.6 2002/12/11 15:42:02 starvik * Extracted v10 (ETRAX 100LX) specific stuff from arch/cris/kernel/ * * Revision 1.5 2002/11/20 06:58:03 starvik * Compiles with kgdb * * Revision 1.4 2002/11/19 14:35:24 starvik * Changes from linux 2.4 * Changed struct initializer syntax to the currently prefered notation * * Revision 1.3 2002/11/06 09:47:03 starvik * Modified for new interrupt macros * * Revision 1.2 2002/01/21 15:21:50 bjornw * Update for kdev_t changes * * Revision 1.6 2001/04/17 13:58:39 orjanf * * Renamed CONFIG_KGDB to CONFIG_ETRAX_KGDB. * * Revision 1.5 2001/03/26 14:22:05 bjornw * Namechange of some config options * * Revision 1.4 2000/10/06 12:37:26 bjornw * Use physical addresses when talking to DMA * * */ #include #include #include #include #include #include #include #include #include /* Get SIMCOUT. */ /* Which serial-port is our debug port ? */ #if defined(CONFIG_ETRAX_DEBUG_PORT0) || defined(CONFIG_ETRAX_DEBUG_PORT_NULL) #define DEBUG_PORT_IDX 0 #define DEBUG_OCMD R_DMA_CH6_CMD #define DEBUG_FIRST R_DMA_CH6_FIRST #define DEBUG_OCLRINT R_DMA_CH6_CLR_INTR #define DEBUG_STATUS R_DMA_CH6_STATUS #define DEBUG_READ R_SERIAL0_READ #define DEBUG_WRITE R_SERIAL0_TR_DATA #define DEBUG_TR_CTRL R_SERIAL0_TR_CTRL #define DEBUG_REC_CTRL R_SERIAL0_REC_CTRL #define DEBUG_IRQ IO_STATE(R_IRQ_MASK1_SET, ser0_data, set) #define DEBUG_DMA_IRQ_CLR IO_STATE(R_IRQ_MASK2_CLR, dma6_descr, clr) #endif #ifdef CONFIG_ETRAX_DEBUG_PORT1 #define DEBUG_PORT_IDX 1 #define DEBUG_OCMD R_DMA_CH8_CMD #define DEBUG_FIRST R_DMA_CH8_FIRST #define DEBUG_OCLRINT R_DMA_CH8_CLR_INTR #define DEBUG_STATUS R_DMA_CH8_STATUS #define DEBUG_READ R_SERIAL1_READ #define DEBUG_WRITE R_SERIAL1_TR_DATA #define DEBUG_TR_CTRL R_SERIAL1_TR_CTRL #define DEBUG_REC_CTRL R_SERIAL1_REC_CTRL #define DEBUG_IRQ IO_STATE(R_IRQ_MASK1_SET, ser1_data, set) #define DEBUG_DMA_IRQ_CLR IO_STATE(R_IRQ_MASK2_CLR, dma8_descr, clr) #endif #ifdef CONFIG_ETRAX_DEBUG_PORT2 #define DEBUG_PORT_IDX 2 #define DEBUG_OCMD R_DMA_CH2_CMD #define DEBUG_FIRST R_DMA_CH2_FIRST #define DEBUG_OCLRINT R_DMA_CH2_CLR_INTR #define DEBUG_STATUS R_DMA_CH2_STATUS #define DEBUG_READ R_SERIAL2_READ #define DEBUG_WRITE R_SERIAL2_TR_DATA #define DEBUG_TR_CTRL R_SERIAL2_TR_CTRL #define DEBUG_REC_CTRL R_SERIAL2_REC_CTRL #define DEBUG_IRQ IO_STATE(R_IRQ_MASK1_SET, ser2_data, set) #define DEBUG_DMA_IRQ_CLR IO_STATE(R_IRQ_MASK2_CLR, dma2_descr, clr) #endif #ifdef CONFIG_ETRAX_DEBUG_PORT3 #define DEBUG_PORT_IDX 3 #define DEBUG_OCMD R_DMA_CH4_CMD #define DEBUG_FIRST R_DMA_CH4_FIRST #define DEBUG_OCLRINT R_DMA_CH4_CLR_INTR #define DEBUG_STATUS R_DMA_CH4_STATUS #define DEBUG_READ R_SERIAL3_READ #define DEBUG_WRITE R_SERIAL3_TR_DATA #define DEBUG_TR_CTRL R_SERIAL3_TR_CTRL #define DEBUG_REC_CTRL R_SERIAL3_REC_CTRL #define DEBUG_IRQ IO_STATE(R_IRQ_MASK1_SET, ser3_data, set) #define DEBUG_DMA_IRQ_CLR IO_STATE(R_IRQ_MASK2_CLR, dma4_descr, clr) #endif #define MIN_SIZE 32 /* Size that triggers the FIFO to flush characters to interface */ static struct tty_driver *serial_driver; typedef int (*debugport_write_function)(int i, const char *buf, unsigned int len); debugport_write_function debug_write_function = NULL; static void console_write_direct(struct console *co, const char *buf, unsigned int len) { int i; /* Send data */ for (i = 0; i < len; i++) { /* Wait until transmitter is ready and send.*/ while(!(*DEBUG_READ & IO_MASK(R_SERIAL0_READ, tr_ready))); *DEBUG_WRITE = buf[i]; } } static void console_write(struct console *co, const char *buf, unsigned int len) { unsigned long flags; #ifdef CONFIG_ETRAX_DEBUG_PORT_NULL /* no debug printout at all */ return; #endif #ifdef CONFIG_SVINTO_SIM /* no use to simulate the serial debug output */ SIMCOUT(buf,len); return; #endif #ifdef CONFIG_ETRAX_KGDB /* kgdb needs to output debug info using the gdb protocol */ putDebugString(buf, len); return; #endif local_irq_save(flags); if (debug_write_function) if (debug_write_function(co->index, buf, len)) return; console_write_direct(co, buf, len); local_irq_restore(flags); } /* legacy function */ void console_print_etrax(const char *buf) { console_write(NULL, buf, strlen(buf)); } /* Use polling to get a single character FROM the debug port */ int getDebugChar(void) { unsigned long readval; do { readval = *DEBUG_READ; } while(!(readval & IO_MASK(R_SERIAL0_READ, data_avail))); return (readval & IO_MASK(R_SERIAL0_READ, data_in)); } /* Use polling to put a single character to the debug port */ void putDebugChar(int val) { while(!(*DEBUG_READ & IO_MASK(R_SERIAL0_READ, tr_ready))) ; ; *DEBUG_WRITE = val; } /* Enable irq for receiving chars on the debug port, used by kgdb */ void enableDebugIRQ(void) { *R_IRQ_MASK1_SET = DEBUG_IRQ; /* use R_VECT_MASK directly, since we really bypass Linux normal * IRQ handling in kgdb anyway, we don't need to use enable_irq */ *R_VECT_MASK_SET = IO_STATE(R_VECT_MASK_SET, serial, set); *DEBUG_REC_CTRL = IO_STATE(R_SERIAL0_REC_CTRL, rec_enable, enable); } static struct tty_driver* console_device(struct console *c, int *index) { *index = c->index; return serial_driver; } static int __init console_setup(struct console *co, char *options) { return 0; } static struct console sercons = { .name = "ttyS", .write = console_write, .read = NULL, .device = console_device, .unblank = NULL, .setup = console_setup, .flags = CON_PRINTBUFFER, .index = DEBUG_PORT_IDX, .cflag = 0, .next = NULL }; /* * Register console (for printk's etc) */ void __init init_etrax_debug(void) { #if CONFIG_ETRAX_DEBUG_PORT_NULL return; #endif #if DEBUG_PORT_IDX == 0 genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma6); genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma6, unused); #elif DEBUG_PORT_IDX == 1 genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma8); genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma8, usb); #elif DEBUG_PORT_IDX == 2 genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma2); genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma2, par0); #elif DEBUG_PORT_IDX == 3 genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma4); genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma4, par1); #endif *R_GEN_CONFIG = genconfig_shadow; register_console(&sercons); } int __init init_console(void) { serial_driver = alloc_tty_driver(1); if (!serial_driver) return -ENOMEM; return 0; }