cc1111 debug port access through cp2103 serial chip

diff --git a/Makefile b/Makefile
new file mode 100644 (file)
index 0000000..54fd11f
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,17 @@
+KERNEL=/local/src/linux-2.6-aiko-64
+KINC=$(KERNEL)/drivers/usb/serial
+
+CFLAGS=-g -I$(KINC)
+
+OBJS=ccdbg-command.o ccdbg-io.o cccp.o
+INCS=ccdbg.h cccp.h
+
+PROG=ccdbg
+
+$(PROG): $(OBJS)
+       $(CC) $(CFLAGS) -o $@ $(OBJS)
+
+clean:
+       rm -f $(PROG) $(OBJS)
+
+$(OBJS): $(INCS)

diff --git a/cccp.c b/cccp.c
new file mode 100644 (file)
index 0000000..aff75e8
--- /dev/null
+++ b/cccp.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright © 2008 Keith Packard <keithp@keithp.com>
+ *
+ * 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.
+ *
+ * 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.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ccdbg.h"
+
+void
+cccp_write(struct ccdbg *dbg, uint8_t mask, uint8_t value)
+{
+       uint16_t        set;
+       int             ret;
+
+       set = (mask) | (value << 8);
+       dbg->debug_data = (dbg->debug_data & ~mask) | (value & mask);
+       ret = ioctl(dbg->fd, CP2101_IOCTL_GPIOSET, &set);
+       if (ret < 0)
+               perror("CP2101_IOCTL_GPIOSET");
+}
+
+uint8_t
+cccp_read(struct ccdbg *dbg, uint8_t mask)
+{
+       uint8_t         pull_up;
+       int             ret;
+       uint8_t         get;
+
+       /* tri-state the bits of interest */
+       pull_up = (~dbg->debug_data) & mask;
+       if (pull_up) {
+               cccp_write(dbg, pull_up, pull_up);
+       }
+       ret = ioctl(dbg->fd, CP2101_IOCTL_GPIOGET, &get);
+       if (ret < 0) {
+               perror("CP2101_IOCTL_GPIOGET");
+               get = 0;
+       }
+       return get & mask;
+}
+
+void
+cccp_init(struct ccdbg *dbg)
+{
+       /* set all of the GPIOs to a known state */
+       cccp_write(dbg, 0xf, 0xf);
+       dbg->clock = 1;
+}
+
+void
+cccp_fini(struct ccdbg *dbg)
+{
+       /* set all of the GPIOs to a known state */
+       cccp_write(dbg, 0xf, 0xf);
+       dbg->clock = 1;
+}

diff --git a/cccp.h b/cccp.h
new file mode 100644 (file)
index 0000000..e71aa08
--- /dev/null
+++ b/cccp.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright © 2008 Keith Packard <keithp@keithp.com>
+ *
+ * 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.
+ *
+ * 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.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+/*
+ * Interface for using a CP2103 to talk to a CC1111
+ */
+
+#ifndef _CCCP_H_
+#define _CCCP_H_
+
+void
+cccp_write(struct ccdbg *dbg, uint8_t mask, uint8_t value);
+
+uint8_t
+cccp_read(struct ccdbg *dbg, uint8_t mask);
+
+void
+cccp_init(struct ccdbg *dbg);
+
+#endif /* _CCCP_H_ */

diff --git a/ccdbg-command.c b/ccdbg-command.c
new file mode 100644 (file)
index 0000000..3e42d48
--- /dev/null
+++ b/ccdbg-command.c
@@ -0,0 +1,43 @@
+/*
+ * Copyright © 2008 Keith Packard <keithp@keithp.com>
+ *
+ * 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.
+ *
+ * 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.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ccdbg.h"
+
+void
+ccdbg_reset(struct ccdbg *dbg)
+{
+       /* force two rising clocks while holding RESET_N low */
+       ccdbg_clock_1_0(dbg);
+       cccp_write(dbg, CC_RESET_N, 0);
+       ccdbg_clock_0_1(dbg);
+       ccdbg_clock_1_0(dbg);
+       ccdbg_clock_0_1(dbg);
+       cccp_write(dbg, CC_RESET_N, CC_RESET_N);
+}
+
+uint8_t
+ccdbg_read_status(struct ccdbg *dbg)
+{
+       return ccdbg_cmd_write_read8(dbg, CC_READ_STATUS, NULL, 0);
+}
+
+uint8_t
+ccdbg_rd_config(struct ccdbg *dbg)
+{
+       return ccdbg_cmd_write_read8(dbg, CC_RD_CONFIG, NULL, 0);
+}

diff --git a/ccdbg-io.c b/ccdbg-io.c
new file mode 100644 (file)
index 0000000..2019885
--- /dev/null
+++ b/ccdbg-io.c
@@ -0,0 +1,135 @@
+/*
+ * Copyright © 2008 Keith Packard <keithp@keithp.com>
+ *
+ * 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.
+ *
+ * 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.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ccdbg.h"
+
+void
+ccdbg_quarter_clock(struct ccdbg *dbg)
+{
+       usleep(CC_CLOCK_US / 4);
+}
+
+struct ccdbg *
+ccdbg_open(char *file)
+{
+       struct ccdbg *dbg;
+
+       dbg = calloc(sizeof (struct ccdbg), 1);
+       if (!dbg) {
+               perror("calloc");
+               return NULL;
+       }
+       dbg->fd = open(file, 2);
+       if (dbg->fd < 0) {
+               perror(file);
+               free(dbg);
+               return NULL;
+       }
+       cccp_init(dbg);
+       return dbg;
+}
+
+void
+ccdbg_clock_1_0(struct ccdbg *dbg)
+{
+       ccdbg_quarter_clock(dbg);
+       assert(dbg->clock == 1);
+       cccp_write(dbg, CC_CLOCK, 0);
+       dbg->clock = 0;
+       ccdbg_quarter_clock(dbg);
+}
+
+void
+ccdbg_clock_0_1(struct ccdbg *dbg)
+{
+       ccdbg_quarter_clock(dbg);
+       assert(dbg->clock == 0);
+       cccp_write(dbg, CC_CLOCK, CC_CLOCK);
+       dbg->clock = 1;
+       ccdbg_quarter_clock(dbg);
+}
+
+/*
+ * By convention, every macro function is entered with dbg->clock == 1
+ */
+
+void
+ccdbg_write_bit(struct ccdbg *dbg, uint8_t bit)
+{
+       ccdbg_clock_1_0(dbg);
+       cccp_write(dbg, CC_DATA, bit ? CC_DATA : 0);
+       ccdbg_clock_0_1(dbg);
+}
+
+void
+ccdbg_write_byte(struct ccdbg *dbg, uint8_t byte)
+{
+       int     bit;
+
+       for (bit = 7; bit >= 0; bit--)
+               ccdbg_write_bit(dbg, (byte >> bit) & 1);
+}
+
+uint8_t
+ccdbg_read_bit(struct ccdbg *dbg)
+{
+       uint8_t data;
+
+       ccdbg_clock_1_0(dbg);
+       data = cccp_read(dbg, CC_DATA);
+       ccdbg_clock_0_1(dbg);
+       return data ? 1 : 0;
+}
+
+uint8_t
+ccdbg_read_byte(struct ccdbg *dbg)
+{
+       int     bit;
+       uint8_t byte = 0;
+
+       for (bit = 7; bit >= 0; bit--)
+               byte |= ccdbg_read_bit(dbg) << bit;
+       return byte;
+}
+
+void
+ccdbg_cmd_write(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
+{
+       int     i;
+       ccdbg_write_byte(dbg, cmd);
+       for (i = 0; i < len; i++)
+               ccdbg_write_byte(dbg, data[i]);
+}
+
+uint8_t
+ccdbg_cmd_write_read8(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
+{
+       ccdbg_cmd_write(dbg, cmd, data, len);
+       return ccdbg_read_byte(dbg);
+}
+
+uint16_t
+ccdbg_cmd_write_read16(struct ccdbg *dbg, uint8_t cmd, uint8_t *data, int len)
+{
+       uint8_t byte1, byte0;
+       ccdbg_cmd_write(dbg, cmd, data, len);
+       byte1 = ccdbg_read_byte(dbg); 
+       byte0 = ccdbg_read_byte(dbg);
+       return (byte1 << 8) | byte0;
+}
+

diff --git a/ccdbg.h b/ccdbg.h
new file mode 100644 (file)
index 0000000..8f937bd
--- /dev/null
+++ b/ccdbg.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright © 2008 Keith Packard <keithp@keithp.com>
+ *
+ * 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.
+ *
+ * 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.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#ifndef _CCDBG_H_
+#define _CCDBG_H_
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <cp2101.h>
+
+#define CC_DATA                CP2101_GPIO_MASK(0)
+#define CC_CLOCK       CP2101_GPIO_MASK(1)
+#define CC_RESET_N     CP2101_GPIO_MASK(2)
+
+/* painfully slow for now */
+#define CC_CLOCK_US    (2 * 1000)
+
+struct ccdbg {
+       int     fd;
+       uint8_t debug_data;
+       int     clock;
+};
+
+#include "cccp.h"
+
+#define CC_CHIP_ERASE          0x14
+
+#define CC_WR_CONFIG           0x1d
+#define CC_RD_CONFIG           0x24
+# define CC_CONFIG_TIMERS_OFF          (1 << 3)
+# define CC_CONFIG_DMA_PAUSE           (1 << 2)
+# define CC_CONFIG_TIMER_SUSPEND       (1 << 1)
+# define CC_SET_FLASH_INFO_PAGE                (1 << 0)
+
+#define CC_GET_PC              0x28
+#define CC_READ_STATUS         0x34
+# define CC_STATUS_CHIP_ERASE_DONE     (1 << 7)
+# define CC_STATUS_PCON_IDLE           (1 << 6)
+# define CC_STATUS_CPU_HALTED          (1 << 5)
+# define CC_STATUS_POWER_MODE_0                (1 << 4)
+# define CC_STATUS_HALT_STATUS         (1 << 3)
+# define CC_STATUS_DEBUG_LOCKED                (1 << 2)
+# define CC_STATUS_OSCILLATOR_STABLE   (1 << 1)
+# define CC_STATUS_STACK_OVERFLOW      (1 << 0)
+
+#define CC_SET_HW_BRKPNT       0x3b
+# define CC_HW_BRKPNT_N(n)     ((n) << 3)
+# define CC_HW_BRKPNT_N_MASK   (0x3 << 3)
+# define CC_HW_BRKPNT_ENABLE   (1 << 2)
+
+#define CC_HALT                        0x44
+#define CC_RESUME              0x4c
+#define CC_DEBUG_INSTR(n)      (0x54|(n))
+#define CC_STEP_INSTR          0x5c
+#define CC_STEP_REPLACE                (0x64|(n))
+#define CC_GET_CHIP_ID         0x68
+
+#endif /* _CCDBG_H_ */