mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-12 22:33:18 +00:00
c2120fbfbc
The sandburst-specific i2c drivers have been deleted, conflict was just over the SPDX conversion. Conflicts: board/sandburst/common/ppc440gx_i2c.c board/sandburst/common/ppc440gx_i2c.h Signed-off-by: Tom Rini <trini@ti.com>
490 lines
14 KiB
C
490 lines
14 KiB
C
/*
|
|
* (C) Copyright 2007
|
|
* Stefan Roese, DENX Software Engineering, sr@denx.de.
|
|
*
|
|
* (C) Copyright 2001, 2002
|
|
* DENX Software Engineering
|
|
* Wolfgang Denk, wd@denx.de
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
/* define DEBUG for debugging output (obviously ;-)) */
|
|
#if 0
|
|
#define DEBUG
|
|
#endif
|
|
|
|
#include <common.h>
|
|
#include <i2c.h>
|
|
#include <command.h>
|
|
#include <post.h>
|
|
#include <serial.h>
|
|
#include <malloc.h>
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/string.h> /* for strdup */
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static void kbd_init (void);
|
|
static int compare_magic (uchar *kbd_data, uchar *str);
|
|
|
|
/*--------------------- Local macros and constants --------------------*/
|
|
#define _NOT_USED_ 0xFFFFFFFF
|
|
|
|
/*------------------------- dspic io expander -----------------------*/
|
|
#define DSPIC_PON_STATUS_REG 0x80A
|
|
#define DSPIC_PON_INV_STATUS_REG 0x80C
|
|
#define DSPIC_PON_KEY_REG 0x810
|
|
/*------------------------- Keyboard controller -----------------------*/
|
|
/* command codes */
|
|
#define KEYBD_CMD_READ_KEYS 0x01
|
|
#define KEYBD_CMD_READ_VERSION 0x02
|
|
#define KEYBD_CMD_READ_STATUS 0x03
|
|
#define KEYBD_CMD_RESET_ERRORS 0x10
|
|
|
|
/* status codes */
|
|
#define KEYBD_STATUS_MASK 0x3F
|
|
#define KEYBD_STATUS_H_RESET 0x20
|
|
#define KEYBD_STATUS_BROWNOUT 0x10
|
|
#define KEYBD_STATUS_WD_RESET 0x08
|
|
#define KEYBD_STATUS_OVERLOAD 0x04
|
|
#define KEYBD_STATUS_ILLEGAL_WR 0x02
|
|
#define KEYBD_STATUS_ILLEGAL_RD 0x01
|
|
|
|
/* Number of bytes returned from Keyboard Controller */
|
|
#define KEYBD_VERSIONLEN 2 /* version information */
|
|
|
|
/*
|
|
* This is different from the "old" lwmon dsPIC kbd controller
|
|
* implementation. Now the controller still answers with 9 bytes,
|
|
* but the last 3 bytes are always "0x06 0x07 0x08". So we just
|
|
* set the length to compare to 6 instead of 9.
|
|
*/
|
|
#define KEYBD_DATALEN 6 /* normal key scan data */
|
|
|
|
/* maximum number of "magic" key codes that can be assigned */
|
|
|
|
static uchar kbd_addr = CONFIG_SYS_I2C_KEYBD_ADDR;
|
|
static uchar dspic_addr = CONFIG_SYS_I2C_DSPIC_IO_ADDR;
|
|
|
|
static uchar *key_match (uchar *);
|
|
|
|
#define KEYBD_SET_DEBUGMODE '#' /* Magic key to enable debug output */
|
|
|
|
/***********************************************************************
|
|
F* Function: int board_postclk_init (void) P*A*Z*
|
|
*
|
|
P* Parameters: none
|
|
P*
|
|
P* Returnvalue: int
|
|
P* - 0 is always returned.
|
|
*
|
|
Z* Intention: This function is the board_postclk_init() method implementation
|
|
Z* for the lwmon board.
|
|
*
|
|
***********************************************************************/
|
|
int board_postclk_init (void)
|
|
{
|
|
kbd_init();
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void kbd_init (void)
|
|
{
|
|
uchar kbd_data[KEYBD_DATALEN];
|
|
uchar tmp_data[KEYBD_DATALEN];
|
|
uchar val, errcd;
|
|
int i;
|
|
|
|
i2c_set_bus_num(0);
|
|
|
|
gd->arch.kbd_status = 0;
|
|
|
|
/* Forced by PIC. Delays <= 175us loose */
|
|
udelay(1000);
|
|
|
|
/* Read initial keyboard error code */
|
|
val = KEYBD_CMD_READ_STATUS;
|
|
i2c_write (kbd_addr, 0, 0, &val, 1);
|
|
i2c_read (kbd_addr, 0, 0, &errcd, 1);
|
|
/* clear unused bits */
|
|
errcd &= KEYBD_STATUS_MASK;
|
|
/* clear "irrelevant" bits. Recommended by Martin Rajek, LWN */
|
|
errcd &= ~(KEYBD_STATUS_H_RESET|KEYBD_STATUS_BROWNOUT);
|
|
if (errcd) {
|
|
gd->arch.kbd_status |= errcd << 8;
|
|
}
|
|
/* Reset error code and verify */
|
|
val = KEYBD_CMD_RESET_ERRORS;
|
|
i2c_write (kbd_addr, 0, 0, &val, 1);
|
|
udelay(1000); /* delay NEEDED by keyboard PIC !!! */
|
|
|
|
val = KEYBD_CMD_READ_STATUS;
|
|
i2c_write (kbd_addr, 0, 0, &val, 1);
|
|
i2c_read (kbd_addr, 0, 0, &val, 1);
|
|
|
|
val &= KEYBD_STATUS_MASK; /* clear unused bits */
|
|
if (val) { /* permanent error, report it */
|
|
gd->arch.kbd_status |= val;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Read current keyboard state.
|
|
*
|
|
* After the error reset it may take some time before the
|
|
* keyboard PIC picks up a valid keyboard scan - the total
|
|
* scan time is approx. 1.6 ms (information by Martin Rajek,
|
|
* 28 Sep 2002). We read a couple of times for the keyboard
|
|
* to stabilize, using a big enough delay.
|
|
* 10 times should be enough. If the data is still changing,
|
|
* we use what we get :-(
|
|
*/
|
|
|
|
memset (tmp_data, 0xFF, KEYBD_DATALEN); /* impossible value */
|
|
for (i=0; i<10; ++i) {
|
|
val = KEYBD_CMD_READ_KEYS;
|
|
i2c_write (kbd_addr, 0, 0, &val, 1);
|
|
i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
|
|
|
|
if (memcmp(kbd_data, tmp_data, KEYBD_DATALEN) == 0) {
|
|
/* consistent state, done */
|
|
break;
|
|
}
|
|
/* remeber last state, delay, and retry */
|
|
memcpy (tmp_data, kbd_data, KEYBD_DATALEN);
|
|
udelay (5000);
|
|
}
|
|
}
|
|
|
|
|
|
/* Read a register from the dsPIC. */
|
|
int _dspic_read(ushort reg, ushort *data)
|
|
{
|
|
uchar buf[sizeof(*data)];
|
|
int rval;
|
|
|
|
if (i2c_read(dspic_addr, reg, 2, buf, 2))
|
|
return -1;
|
|
|
|
rval = i2c_read(dspic_addr, reg, sizeof(reg), buf, sizeof(*data));
|
|
*data = (buf[0] << 8) | buf[1];
|
|
|
|
return rval;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
F* Function: int misc_init_r (void) P*A*Z*
|
|
*
|
|
P* Parameters: none
|
|
P*
|
|
P* Returnvalue: int
|
|
P* - 0 is always returned, even in the case of a keyboard
|
|
P* error.
|
|
*
|
|
Z* Intention: This function is the misc_init_r() method implementation
|
|
Z* for the lwmon board.
|
|
Z* The keyboard controller is initialized and the result
|
|
Z* of a read copied to the environment variable "keybd".
|
|
Z* If KEYBD_SET_DEBUGMODE is defined, a check is made for
|
|
Z* this key, and if found display to the LCD will be enabled.
|
|
Z* The keys in "keybd" are checked against the magic
|
|
Z* keycommands defined in the environment.
|
|
Z* See also key_match().
|
|
*
|
|
D* Design: wd@denx.de
|
|
C* Coding: wd@denx.de
|
|
V* Verification: dzu@denx.de
|
|
***********************************************************************/
|
|
int misc_init_r_kbd (void)
|
|
{
|
|
uchar kbd_data[KEYBD_DATALEN];
|
|
char keybd_env[2 * KEYBD_DATALEN + 1];
|
|
uchar kbd_init_status = gd->arch.kbd_status >> 8;
|
|
uchar kbd_status = gd->arch.kbd_status;
|
|
uchar val;
|
|
ushort data, inv_data;
|
|
char *str;
|
|
int i;
|
|
|
|
if (kbd_init_status) {
|
|
printf ("KEYBD: Error %02X\n", kbd_init_status);
|
|
}
|
|
if (kbd_status) { /* permanent error, report it */
|
|
printf ("*** Keyboard error code %02X ***\n", kbd_status);
|
|
sprintf (keybd_env, "%02X", kbd_status);
|
|
setenv ("keybd", keybd_env);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Now we know that we have a working keyboard, so disable
|
|
* all output to the LCD except when a key press is detected.
|
|
*/
|
|
|
|
if ((console_assign (stdout, "serial") < 0) ||
|
|
(console_assign (stderr, "serial") < 0)) {
|
|
printf ("Can't assign serial port as output device\n");
|
|
}
|
|
|
|
/* Read Version */
|
|
val = KEYBD_CMD_READ_VERSION;
|
|
i2c_write (kbd_addr, 0, 0, &val, 1);
|
|
i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_VERSIONLEN);
|
|
printf ("KEYBD: Version %d.%d\n", kbd_data[0], kbd_data[1]);
|
|
|
|
/* Read current keyboard state */
|
|
val = KEYBD_CMD_READ_KEYS;
|
|
i2c_write (kbd_addr, 0, 0, &val, 1);
|
|
i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
|
|
|
|
/* read out start key from bse01 received via can */
|
|
_dspic_read(DSPIC_PON_STATUS_REG, &data);
|
|
/* check highbyte from status register */
|
|
if (data > 0xFF) {
|
|
_dspic_read(DSPIC_PON_INV_STATUS_REG, &inv_data);
|
|
|
|
/* check inverse data */
|
|
if ((data+inv_data) == 0xFFFF) {
|
|
/* don't overwrite local key */
|
|
if (kbd_data[1] == 0) {
|
|
/* read key value */
|
|
_dspic_read(DSPIC_PON_KEY_REG, &data);
|
|
str = (char *)&data;
|
|
/* swap bytes */
|
|
kbd_data[1] = str[1];
|
|
kbd_data[2] = str[0];
|
|
printf("CAN received startkey: 0x%X\n", data);
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < KEYBD_DATALEN; ++i) {
|
|
sprintf (keybd_env + i + i, "%02X", kbd_data[i]);
|
|
}
|
|
|
|
setenv ("keybd", keybd_env);
|
|
|
|
str = strdup ((char *)key_match (kbd_data)); /* decode keys */
|
|
#ifdef KEYBD_SET_DEBUGMODE
|
|
if (kbd_data[0] == KEYBD_SET_DEBUGMODE) { /* set debug mode */
|
|
if ((console_assign (stdout, "lcd") < 0) ||
|
|
(console_assign (stderr, "lcd") < 0)) {
|
|
printf ("Can't assign LCD display as output device\n");
|
|
}
|
|
}
|
|
#endif /* KEYBD_SET_DEBUGMODE */
|
|
#ifdef CONFIG_PREBOOT /* automatically configure "preboot" command on key match */
|
|
setenv ("preboot", str); /* set or delete definition */
|
|
#endif /* CONFIG_PREBOOT */
|
|
if (str != NULL) {
|
|
free (str);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
#ifdef CONFIG_PREBOOT
|
|
|
|
static uchar kbd_magic_prefix[] = "key_magic";
|
|
static uchar kbd_command_prefix[] = "key_cmd";
|
|
|
|
static int compare_magic (uchar *kbd_data, uchar *str)
|
|
{
|
|
uchar compare[KEYBD_DATALEN-1];
|
|
char *nxt;
|
|
int i;
|
|
|
|
/* Don't include modifier byte */
|
|
memcpy (compare, kbd_data+1, KEYBD_DATALEN-1);
|
|
|
|
for (; str != NULL; str = (*nxt) ? (uchar *)(nxt+1) : (uchar *)nxt) {
|
|
uchar c;
|
|
int k;
|
|
|
|
c = (uchar) simple_strtoul ((char *)str, (char **) (&nxt), 16);
|
|
|
|
if (str == (uchar *)nxt) { /* invalid character */
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Check if this key matches the input.
|
|
* Set matches to zero, so they match only once
|
|
* and we can find duplicates or extra keys
|
|
*/
|
|
for (k = 0; k < sizeof(compare); ++k) {
|
|
if (compare[k] == '\0') /* only non-zero entries */
|
|
continue;
|
|
if (c == compare[k]) { /* found matching key */
|
|
compare[k] = '\0';
|
|
break;
|
|
}
|
|
}
|
|
if (k == sizeof(compare)) {
|
|
return -1; /* unmatched key */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* A full match leaves no keys in the `compare' array,
|
|
*/
|
|
for (i = 0; i < sizeof(compare); ++i) {
|
|
if (compare[i])
|
|
{
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/***********************************************************************
|
|
F* Function: static uchar *key_match (uchar *kbd_data) P*A*Z*
|
|
*
|
|
P* Parameters: uchar *kbd_data
|
|
P* - The keys to match against our magic definitions
|
|
P*
|
|
P* Returnvalue: uchar *
|
|
P* - != NULL: Pointer to the corresponding command(s)
|
|
P* NULL: No magic is about to happen
|
|
*
|
|
Z* Intention: Check if pressed key(s) match magic sequence,
|
|
Z* and return the command string associated with that key(s).
|
|
Z*
|
|
Z* If no key press was decoded, NULL is returned.
|
|
Z*
|
|
Z* Note: the first character of the argument will be
|
|
Z* overwritten with the "magic charcter code" of the
|
|
Z* decoded key(s), or '\0'.
|
|
Z*
|
|
Z* Note: the string points to static environment data
|
|
Z* and must be saved before you call any function that
|
|
Z* modifies the environment.
|
|
*
|
|
D* Design: wd@denx.de
|
|
C* Coding: wd@denx.de
|
|
V* Verification: dzu@denx.de
|
|
***********************************************************************/
|
|
static uchar *key_match (uchar *kbd_data)
|
|
{
|
|
char magic[sizeof (kbd_magic_prefix) + 1];
|
|
uchar *suffix;
|
|
char *kbd_magic_keys;
|
|
|
|
/*
|
|
* The following string defines the characters that can pe appended
|
|
* to "key_magic" to form the names of environment variables that
|
|
* hold "magic" key codes, i. e. such key codes that can cause
|
|
* pre-boot actions. If the string is empty (""), then only
|
|
* "key_magic" is checked (old behaviour); the string "125" causes
|
|
* checks for "key_magic1", "key_magic2" and "key_magic5", etc.
|
|
*/
|
|
if ((kbd_magic_keys = getenv ("magic_keys")) == NULL)
|
|
kbd_magic_keys = "";
|
|
|
|
/* loop over all magic keys;
|
|
* use '\0' suffix in case of empty string
|
|
*/
|
|
for (suffix=(uchar *)kbd_magic_keys; *suffix || suffix==(uchar *)kbd_magic_keys; ++suffix) {
|
|
sprintf (magic, "%s%c", kbd_magic_prefix, *suffix);
|
|
debug ("### Check magic \"%s\"\n", magic);
|
|
if (compare_magic(kbd_data, (uchar *)getenv(magic)) == 0) {
|
|
char cmd_name[sizeof (kbd_command_prefix) + 1];
|
|
char *cmd;
|
|
|
|
sprintf (cmd_name, "%s%c", kbd_command_prefix, *suffix);
|
|
|
|
cmd = getenv (cmd_name);
|
|
debug ("### Set PREBOOT to $(%s): \"%s\"\n",
|
|
cmd_name, cmd ? cmd : "<<NULL>>");
|
|
*kbd_data = *suffix;
|
|
return ((uchar *)cmd);
|
|
}
|
|
}
|
|
debug ("### Delete PREBOOT\n");
|
|
*kbd_data = '\0';
|
|
return (NULL);
|
|
}
|
|
#endif /* CONFIG_PREBOOT */
|
|
|
|
/***********************************************************************
|
|
F* Function: int do_kbd (cmd_tbl_t *cmdtp, int flag,
|
|
F* int argc, char * const argv[]) P*A*Z*
|
|
*
|
|
P* Parameters: cmd_tbl_t *cmdtp
|
|
P* - Pointer to our command table entry
|
|
P* int flag
|
|
P* - If the CMD_FLAG_REPEAT bit is set, then this call is
|
|
P* a repetition
|
|
P* int argc
|
|
P* - Argument count
|
|
P* char * const argv[]
|
|
P* - Array of the actual arguments
|
|
P*
|
|
P* Returnvalue: int
|
|
P* - 0 is always returned.
|
|
*
|
|
Z* Intention: Implement the "kbd" command.
|
|
Z* The keyboard status is read. The result is printed on
|
|
Z* the console and written into the "keybd" environment
|
|
Z* variable.
|
|
*
|
|
D* Design: wd@denx.de
|
|
C* Coding: wd@denx.de
|
|
V* Verification: dzu@denx.de
|
|
***********************************************************************/
|
|
int do_kbd (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
|
{
|
|
uchar kbd_data[KEYBD_DATALEN];
|
|
char keybd_env[2 * KEYBD_DATALEN + 1];
|
|
uchar val;
|
|
int i;
|
|
|
|
#if 0 /* Done in kbd_init */
|
|
i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
|
|
#endif
|
|
|
|
/* Read keys */
|
|
val = KEYBD_CMD_READ_KEYS;
|
|
i2c_write (kbd_addr, 0, 0, &val, 1);
|
|
i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
|
|
|
|
puts ("Keys:");
|
|
for (i = 0; i < KEYBD_DATALEN; ++i) {
|
|
sprintf (keybd_env + i + i, "%02X", kbd_data[i]);
|
|
printf (" %02x", kbd_data[i]);
|
|
}
|
|
putc ('\n');
|
|
setenv ("keybd", keybd_env);
|
|
return 0;
|
|
}
|
|
|
|
U_BOOT_CMD(
|
|
kbd, 1, 1, do_kbd,
|
|
"read keyboard status",
|
|
""
|
|
);
|
|
|
|
/*----------------------------- Utilities -----------------------------*/
|
|
|
|
#ifdef CONFIG_POST
|
|
/*
|
|
* Returns 1 if keys pressed to start the power-on long-running tests
|
|
* Called from board_init_f().
|
|
*/
|
|
int post_hotkeys_pressed(void)
|
|
{
|
|
uchar kbd_data[KEYBD_DATALEN];
|
|
uchar val;
|
|
|
|
/* Read keys */
|
|
val = KEYBD_CMD_READ_KEYS;
|
|
i2c_write (kbd_addr, 0, 0, &val, 1);
|
|
i2c_read (kbd_addr, 0, 0, kbd_data, KEYBD_DATALEN);
|
|
|
|
return (compare_magic(kbd_data, (uchar *)CONFIG_POST_KEY_MAGIC) == 0);
|
|
}
|
|
#endif
|