1 files changed, 715 insertions, 0 deletions

diff --git a/roms/u-boot/api/api.c b/roms/u-boot/api/api.c
new file mode 100644
index 000000000..89003c161
--- /dev/null
+++ b/roms/u-boot/api/api.c
@@ -0,0 +1,715 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2007 Semihalf
+ *
+ * Written by: Rafal Jaworowski <raj@semihalf.com>
+ */
+
+#include <config.h>
+#include <command.h>
+#include <common.h>
+#include <env.h>
+#include <malloc.h>
+#include <env_internal.h>
+#include <linux/delay.h>
+#include <linux/types.h>
+#include <api_public.h>
+#include <u-boot/crc.h>
+
+#include "api_private.h"
+
+#define DEBUG
+#undef DEBUG
+
+/*****************************************************************************
+ *
+ * This is the API core.
+ *
+ * API_ functions are part of U-Boot code and constitute the lowest level
+ * calls:
+ *
+ *  - they know what values they need as arguments
+ *  - their direct return value pertains to the API_ "shell" itself (0 on
+ *    success, some error code otherwise)
+ *  - if the call returns a value it is buried within arguments
+ *
+ ****************************************************************************/
+
+#ifdef DEBUG
+#define debugf(fmt, args...) do { printf("%s(): ", __func__); printf(fmt, ##args); } while (0)
+#else
+#define debugf(fmt, args...)
+#endif
+
+typedef	int (*cfp_t)(va_list argp);
+
+static int calls_no;
+
+/*
+ * pseudo signature:
+ *
+ * int API_getc(int *c)
+ */
+static int API_getc(va_list ap)
+{
+	int *c;
+
+	if ((c = (int *)va_arg(ap, uintptr_t)) == NULL)
+		return API_EINVAL;
+
+	*c = getchar();
+	return 0;
+}
+
+/*
+ * pseudo signature:
+ *
+ * int API_tstc(int *c)
+ */
+static int API_tstc(va_list ap)
+{
+	int *t;
+
+	if ((t = (int *)va_arg(ap, uintptr_t)) == NULL)
+		return API_EINVAL;
+
+	*t = tstc();
+	return 0;
+}
+
+/*
+ * pseudo signature:
+ *
+ * int API_putc(char *ch)
+ */
+static int API_putc(va_list ap)
+{
+	char *c;
+
+	if ((c = (char *)va_arg(ap, uintptr_t)) == NULL)
+		return API_EINVAL;
+
+	putc(*c);
+	return 0;
+}
+
+/*
+ * pseudo signature:
+ *
+ * int API_puts(char **s)
+ */
+static int API_puts(va_list ap)
+{
+	char *s;
+
+	if ((s = (char *)va_arg(ap, uintptr_t)) == NULL)
+		return API_EINVAL;
+
+	puts(s);
+	return 0;
+}
+
+/*
+ * pseudo signature:
+ *
+ * int API_reset(void)
+ */
+static int API_reset(va_list ap)
+{
+	do_reset(NULL, 0, 0, NULL);
+
+	/* NOT REACHED */
+	return 0;
+}
+
+/*
+ * pseudo signature:
+ *
+ * int API_get_sys_info(struct sys_info *si)
+ *
+ * fill out the sys_info struct containing selected parameters about the
+ * machine
+ */
+static int API_get_sys_info(va_list ap)
+{
+	struct sys_info *si;
+
+	si = (struct sys_info *)va_arg(ap, uintptr_t);
+	if (si == NULL)
+		return API_ENOMEM;
+
+	return (platform_sys_info(si)) ? 0 : API_ENODEV;
+}
+
+/*
+ * pseudo signature:
+ *
+ * int API_udelay(unsigned long *udelay)
+ */
+static int API_udelay(va_list ap)
+{
+	unsigned long *d;
+
+	if ((d = (unsigned long *)va_arg(ap, unsigned long)) == NULL)
+		return API_EINVAL;
+
+	udelay(*d);
+	return 0;
+}
+
+/*
+ * pseudo signature:
+ *
+ * int API_get_timer(unsigned long *current, unsigned long *base)
+ */
+static int API_get_timer(va_list ap)
+{
+	unsigned long *base, *cur;
+
+	cur = (unsigned long *)va_arg(ap, unsigned long);
+	if (cur == NULL)
+		return API_EINVAL;
+
+	base = (unsigned long *)va_arg(ap, unsigned long);
+	if (base == NULL)
+		return API_EINVAL;
+
+	*cur = get_timer(*base);
+	return 0;
+}
+
+
+/*****************************************************************************
+ *
+ * pseudo signature:
+ *
+ * int API_dev_enum(struct device_info *)
+ *
+ *
+ * cookies uniqely identify the previously enumerated device instance and
+ * provide a hint for what to inspect in current enum iteration:
+ *
+ *   - net: &eth_device struct address from list pointed to by eth_devices
+ *
+ *   - storage: struct blk_desc struct address from &ide_dev_desc[n],
+ *     &scsi_dev_desc[n] and similar tables
+ *
+ ****************************************************************************/
+
+static int API_dev_enum(va_list ap)
+{
+	struct device_info *di;
+
+	/* arg is ptr to the device_info struct we are going to fill out */
+	di = (struct device_info *)va_arg(ap, uintptr_t);
+	if (di == NULL)
+		return API_EINVAL;
+
+	if (di->cookie == NULL) {
+		/* start over - clean up enumeration */
+		dev_enum_reset();	/* XXX shouldn't the name contain 'stor'? */
+		debugf("RESTART ENUM\n");
+
+		/* net device enumeration first */
+		if (dev_enum_net(di))
+			return 0;
+	}
+
+	/*
+	 * The hidden assumption is there can only be one active network
+	 * device and it is identified upon enumeration (re)start, so there's
+	 * no point in trying to find network devices in other cases than the
+	 * (re)start and hence the 'next' device can only be storage
+	 */
+	if (!dev_enum_storage(di))
+		/* make sure we mark there are no more devices */
+		di->cookie = NULL;
+
+	return 0;
+}
+
+
+static int API_dev_open(va_list ap)
+{
+	struct device_info *di;
+	int err = 0;
+
+	/* arg is ptr to the device_info struct */
+	di = (struct device_info *)va_arg(ap, uintptr_t);
+	if (di == NULL)
+		return API_EINVAL;
+
+	/* Allow only one consumer of the device at a time */
+	if (di->state == DEV_STA_OPEN)
+		return API_EBUSY;
+
+	if (di->cookie == NULL)
+		return API_ENODEV;
+
+	if (di->type & DEV_TYP_STOR)
+		err = dev_open_stor(di->cookie);
+
+	else if (di->type & DEV_TYP_NET)
+		err = dev_open_net(di->cookie);
+	else
+		err = API_ENODEV;
+
+	if (!err)
+		di->state = DEV_STA_OPEN;
+
+	return err;
+}
+
+
+static int API_dev_close(va_list ap)
+{
+	struct device_info *di;
+	int err = 0;
+
+	/* arg is ptr to the device_info struct */
+	di = (struct device_info *)va_arg(ap, uintptr_t);
+	if (di == NULL)
+		return API_EINVAL;
+
+	if (di->state == DEV_STA_CLOSED)
+		return 0;
+
+	if (di->cookie == NULL)
+		return API_ENODEV;
+
+	if (di->type & DEV_TYP_STOR)
+		err = dev_close_stor(di->cookie);
+
+	else if (di->type & DEV_TYP_NET)
+		err = dev_close_net(di->cookie);
+	else
+		/*
+		 * In case of unknown device we cannot change its state, so
+		 * only return error code
+		 */
+		err = API_ENODEV;
+
+	if (!err)
+		di->state = DEV_STA_CLOSED;
+
+	return err;
+}
+
+
+/*
+ * pseudo signature:
+ *
+ * int API_dev_write(
+ *	struct device_info *di,
+ *	void *buf,
+ *	int *len,
+ *	unsigned long *start
+ * )
+ *
+ * buf:	ptr to buffer from where to get the data to send
+ *
+ * len: ptr to length to be read
+ *      - network: len of packet to be sent (in bytes)
+ *      - storage: # of blocks to write (can vary in size depending on define)
+ *
+ * start: ptr to start block (only used for storage devices, ignored for
+ *        network)
+ */
+static int API_dev_write(va_list ap)
+{
+	struct device_info *di;
+	void *buf;
+	lbasize_t *len_stor, act_len_stor;
+	lbastart_t *start;
+	int *len_net;
+	int err = 0;
+
+	/* 1. arg is ptr to the device_info struct */
+	di = (struct device_info *)va_arg(ap, uintptr_t);
+	if (di == NULL)
+		return API_EINVAL;
+
+	/* XXX should we check if device is open? i.e. the ->state ? */
+
+	if (di->cookie == NULL)
+		return API_ENODEV;
+
+	/* 2. arg is ptr to buffer from where to get data to write */
+	buf = (void *)va_arg(ap, uintptr_t);
+	if (buf == NULL)
+		return API_EINVAL;
+
+	if (di->type & DEV_TYP_STOR) {
+		/* 3. arg - ptr to var with # of blocks to write */
+		len_stor = (lbasize_t *)va_arg(ap, uintptr_t);
+		if (!len_stor)
+			return API_EINVAL;
+		if (*len_stor <= 0)
+			return API_EINVAL;
+
+		/* 4. arg - ptr to var with start block */
+		start = (lbastart_t *)va_arg(ap, uintptr_t);
+
+		act_len_stor = dev_write_stor(di->cookie, buf, *len_stor, *start);
+		if (act_len_stor != *len_stor) {
+			debugf("write @ %llu: done %llu out of %llu blocks",
+				   (uint64_t)blk, (uint64_t)act_len_stor,
+				   (uint64_t)len_stor);
+			return API_EIO;
+		}
+
+	} else if (di->type & DEV_TYP_NET) {
+		/* 3. arg points to the var with length of packet to write */
+		len_net = (int *)va_arg(ap, uintptr_t);
+		if (!len_net)
+			return API_EINVAL;
+		if (*len_net <= 0)
+			return API_EINVAL;
+
+		err = dev_write_net(di->cookie, buf, *len_net);
+
+	} else
+		err = API_ENODEV;
+
+	return err;
+}
+
+
+/*
+ * pseudo signature:
+ *
+ * int API_dev_read(
+ *	struct device_info *di,
+ *	void *buf,
+ *	size_t *len,
+ *	unsigned long *start
+ *	size_t *act_len
+ * )
+ *
+ * buf:	ptr to buffer where to put the read data
+ *
+ * len: ptr to length to be read
+ *      - network: len of packet to read (in bytes)
+ *      - storage: # of blocks to read (can vary in size depending on define)
+ *
+ * start: ptr to start block (only used for storage devices, ignored for
+ *        network)
+ *
+ * act_len: ptr to where to put the len actually read
+ */
+static int API_dev_read(va_list ap)
+{
+	struct device_info *di;
+	void *buf;
+	lbasize_t *len_stor, *act_len_stor;
+	lbastart_t *start;
+	int *len_net, *act_len_net;
+
+	/* 1. arg is ptr to the device_info struct */
+	di = (struct device_info *)va_arg(ap, uintptr_t);
+	if (di == NULL)
+		return API_EINVAL;
+
+	/* XXX should we check if device is open? i.e. the ->state ? */
+
+	if (di->cookie == NULL)
+		return API_ENODEV;
+
+	/* 2. arg is ptr to buffer from where to put the read data */
+	buf = (void *)va_arg(ap, uintptr_t);
+	if (buf == NULL)
+		return API_EINVAL;
+
+	if (di->type & DEV_TYP_STOR) {
+		/* 3. arg - ptr to var with # of blocks to read */
+		len_stor = (lbasize_t *)va_arg(ap, uintptr_t);
+		if (!len_stor)
+			return API_EINVAL;
+		if (*len_stor <= 0)
+			return API_EINVAL;
+
+		/* 4. arg - ptr to var with start block */
+		start = (lbastart_t *)va_arg(ap, uintptr_t);
+
+		/* 5. arg - ptr to var where to put the len actually read */
+		act_len_stor = (lbasize_t *)va_arg(ap, uintptr_t);
+		if (!act_len_stor)
+			return API_EINVAL;
+
+		*act_len_stor = dev_read_stor(di->cookie, buf, *len_stor, *start);
+
+	} else if (di->type & DEV_TYP_NET) {
+
+		/* 3. arg points to the var with length of packet to read */
+		len_net = (int *)va_arg(ap, uintptr_t);
+		if (!len_net)
+			return API_EINVAL;
+		if (*len_net <= 0)
+			return API_EINVAL;
+
+		/* 4. - ptr to var where to put the len actually read */
+		act_len_net = (int *)va_arg(ap, uintptr_t);
+		if (!act_len_net)
+			return API_EINVAL;
+
+		*act_len_net = dev_read_net(di->cookie, buf, *len_net);
+
+	} else
+		return API_ENODEV;
+
+	return 0;
+}
+
+
+/*
+ * pseudo signature:
+ *
+ * int API_env_get(const char *name, char **value)
+ *
+ * name: ptr to name of env var
+ */
+static int API_env_get(va_list ap)
+{
+	char *name, **value;
+
+	if ((name = (char *)va_arg(ap, uintptr_t)) == NULL)
+		return API_EINVAL;
+	if ((value = (char **)va_arg(ap, uintptr_t)) == NULL)
+		return API_EINVAL;
+
+	*value = env_get(name);
+
+	return 0;
+}
+
+/*
+ * pseudo signature:
+ *
+ * int API_env_set(const char *name, const char *value)
+ *
+ * name: ptr to name of env var
+ *
+ * value: ptr to value to be set
+ */
+static int API_env_set(va_list ap)
+{
+	char *name, *value;
+
+	if ((name = (char *)va_arg(ap, uintptr_t)) == NULL)
+		return API_EINVAL;
+	if ((value = (char *)va_arg(ap, uintptr_t)) == NULL)
+		return API_EINVAL;
+
+	env_set(name, value);
+
+	return 0;
+}
+
+/*
+ * pseudo signature:
+ *
+ * int API_env_enum(const char *last, char **next)
+ *
+ * last: ptr to name of env var found in last iteration
+ */
+static int API_env_enum(va_list ap)
+{
+	int i, buflen;
+	char *last, **next, *s;
+	struct env_entry *match, search;
+	static char *var;
+
+	last = (char *)va_arg(ap, unsigned long);
+
+	if ((next = (char **)va_arg(ap, uintptr_t)) == NULL)
+		return API_EINVAL;
+
+	if (last == NULL) {
+		var = NULL;
+		i = 0;
+	} else {
+		var = strdup(last);
+		s = strchr(var, '=');
+		if (s != NULL)
+			*s = 0;
+		search.key = var;
+		i = hsearch_r(search, ENV_FIND, &match, &env_htab, 0);
+		if (i == 0) {
+			i = API_EINVAL;
+			goto done;
+		}
+	}
+
+	/* match the next entry after i */
+	i = hmatch_r("", i, &match, &env_htab);
+	if (i == 0)
+		goto done;
+	buflen = strlen(match->key) + strlen(match->data) + 2;
+	var = realloc(var, buflen);
+	snprintf(var, buflen, "%s=%s", match->key, match->data);
+	*next = var;
+	return 0;
+
+done:
+	free(var);
+	var = NULL;
+	*next = NULL;
+	return i;
+}
+
+/*
+ * pseudo signature:
+ *
+ * int API_display_get_info(int type, struct display_info *di)
+ */
+static int API_display_get_info(va_list ap)
+{
+	int type;
+	struct display_info *di;
+
+	type = va_arg(ap, int);
+	di = va_arg(ap, struct display_info *);
+
+	return display_get_info(type, di);
+}
+
+/*
+ * pseudo signature:
+ *
+ * int API_display_draw_bitmap(ulong bitmap, int x, int y)
+ */
+static int API_display_draw_bitmap(va_list ap)
+{
+	ulong bitmap;
+	int x, y;
+
+	bitmap = va_arg(ap, ulong);
+	x = va_arg(ap, int);
+	y = va_arg(ap, int);
+
+	return display_draw_bitmap(bitmap, x, y);
+}
+
+/*
+ * pseudo signature:
+ *
+ * void API_display_clear(void)
+ */
+static int API_display_clear(va_list ap)
+{
+	display_clear();
+	return 0;
+}
+
+static cfp_t calls_table[API_MAXCALL] = { NULL, };
+
+/*
+ * The main syscall entry point - this is not reentrant, only one call is
+ * serviced until finished.
+ *
+ * e.g. syscall(1, int *, u_int32_t, u_int32_t, u_int32_t, u_int32_t);
+ *
+ * call:	syscall number
+ *
+ * retval:	points to the return value placeholder, this is the place the
+ *		syscall puts its return value, if NULL the caller does not
+ *		expect a return value
+ *
+ * ...		syscall arguments (variable number)
+ *
+ * returns:	0 if the call not found, 1 if serviced
+ */
+int syscall(int call, int *retval, ...)
+{
+	va_list	ap;
+	int rv;
+
+	if (call < 0 || call >= calls_no) {
+		debugf("invalid call #%d\n", call);
+		return 0;
+	}
+
+	if (calls_table[call] == NULL) {
+		debugf("syscall #%d does not have a handler\n", call);
+		return 0;
+	}
+
+	va_start(ap, retval);
+	rv = calls_table[call](ap);
+	if (retval != NULL)
+		*retval = rv;
+
+	return 1;
+}
+
+int api_init(void)
+{
+	struct api_signature *sig;
+
+	/* TODO put this into linker set one day... */
+	calls_table[API_RSVD] = NULL;
+	calls_table[API_GETC] = &API_getc;
+	calls_table[API_PUTC] = &API_putc;
+	calls_table[API_TSTC] = &API_tstc;
+	calls_table[API_PUTS] = &API_puts;
+	calls_table[API_RESET] = &API_reset;
+	calls_table[API_GET_SYS_INFO] = &API_get_sys_info;
+	calls_table[API_UDELAY] = &API_udelay;
+	calls_table[API_GET_TIMER] = &API_get_timer;
+	calls_table[API_DEV_ENUM] = &API_dev_enum;
+	calls_table[API_DEV_OPEN] = &API_dev_open;
+	calls_table[API_DEV_CLOSE] = &API_dev_close;
+	calls_table[API_DEV_READ] = &API_dev_read;
+	calls_table[API_DEV_WRITE] = &API_dev_write;
+	calls_table[API_ENV_GET] = &API_env_get;
+	calls_table[API_ENV_SET] = &API_env_set;
+	calls_table[API_ENV_ENUM] = &API_env_enum;
+	calls_table[API_DISPLAY_GET_INFO] = &API_display_get_info;
+	calls_table[API_DISPLAY_DRAW_BITMAP] = &API_display_draw_bitmap;
+	calls_table[API_DISPLAY_CLEAR] = &API_display_clear;
+	calls_no = API_MAXCALL;
+
+	debugf("API initialized with %d calls\n", calls_no);
+
+	dev_stor_init();
+
+	/*
+	 * Produce the signature so the API consumers can find it
+	 */
+	sig = malloc(sizeof(struct api_signature));
+	if (sig == NULL) {
+		printf("API: could not allocate memory for the signature!\n");
+		return -ENOMEM;
+	}
+
+	env_set_hex("api_address", (unsigned long)sig);
+	debugf("API sig @ 0x%lX\n", (unsigned long)sig);
+	memcpy(sig->magic, API_SIG_MAGIC, 8);
+	sig->version = API_SIG_VERSION;
+	sig->syscall = &syscall;
+	sig->checksum = 0;
+	sig->checksum = crc32(0, (unsigned char *)sig,
+			      sizeof(struct api_signature));
+	debugf("syscall entry: 0x%lX\n", (unsigned long)sig->syscall);
+
+	return 0;
+}
+
+void platform_set_mr(struct sys_info *si, unsigned long start, unsigned long size,
+			int flags)
+{
+	int i;
+
+	if (!si->mr || !size || (flags == 0))
+		return;
+
+	/* find free slot */
+	for (i = 0; i < si->mr_no; i++)
+		if (si->mr[i].flags == 0) {
+			/* insert new mem region */
+			si->mr[i].start = start;
+			si->mr[i].size = size;
+			si->mr[i].flags = flags;
+			return;
+		}
+}