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-rw-r--r--recipes/gsm/files/0001-Introduce-ports.patch710
1 files changed, 710 insertions, 0 deletions
diff --git a/recipes/gsm/files/0001-Introduce-ports.patch b/recipes/gsm/files/0001-Introduce-ports.patch
new file mode 100644
index 0000000000..ce96ba5c92
--- /dev/null
+++ b/recipes/gsm/files/0001-Introduce-ports.patch
@@ -0,0 +1,710 @@
+From 516d67c679101d1503dbd4c0613bcd6ff1b604e4 Mon Sep 17 00:00:00 2001
+From: Andrzej Zaborowski <balrog@zabor.org>
+Date: Wed, 19 Sep 2007 14:03:28 +0200
+Subject: [PATCH] Introduce ports.
+
+---
+ include/gsmd/atcmd.h | 2 +-
+ include/gsmd/gsmd.h | 7 +-
+ include/gsmd/uart.h | 28 ++++++
+ include/gsmd/vendorplugin.h | 4 +-
+ src/gsmd/Makefile.am | 2 +-
+ src/gsmd/atcmd.c | 177 +++++++++++++++++---------------------
+ src/gsmd/gsmd.c | 64 ++------------
+ src/gsmd/uart.c | 202 +++++++++++++++++++++++++++++++++++++++++++
+ 8 files changed, 328 insertions(+), 158 deletions(-)
+ create mode 100644 include/gsmd/uart.h
+ create mode 100644 src/gsmd/uart.c
+
+diff --git a/include/gsmd/atcmd.h b/include/gsmd/atcmd.h
+index 0d6c62a..a1af6a0 100644
+--- a/include/gsmd/atcmd.h
++++ b/include/gsmd/atcmd.h
+@@ -9,7 +9,7 @@ typedef int atcmd_cb_t(struct gsmd_atcmd *cmd, void *ctx, char *resp);
+
+ extern struct gsmd_atcmd *atcmd_fill(const char *cmd, int rlen, atcmd_cb_t *cb, void *ctx, u_int16_t id);
+ extern int atcmd_submit(struct gsmd *g, struct gsmd_atcmd *cmd);
+-extern int atcmd_init(struct gsmd *g, int sockfd);
++extern int atcmd_init(struct gsmd *g, struct gsmd_port *port);
+ extern void atcmd_drain(int fd);
+
+ #endif /* __GSMD__ */
+diff --git a/include/gsmd/gsmd.h b/include/gsmd/gsmd.h
+index ed334f1..4afdf66 100644
+--- a/include/gsmd/gsmd.h
++++ b/include/gsmd/gsmd.h
+@@ -10,6 +10,7 @@
+ #include <gsmd/machineplugin.h>
+ #include <gsmd/vendorplugin.h>
+ #include <gsmd/select.h>
++#include <gsmd/uart.h>
+ #include <gsmd/state.h>
+
+ void *gsmd_tallocs;
+@@ -52,6 +53,7 @@ enum llparse_state {
+ #define MLPARSE_BUF_SIZE 65535
+
+ struct llparser {
++ struct gsmd_port *port;
+ enum llparse_state state;
+ unsigned int len;
+ unsigned int flags;
+@@ -70,7 +72,7 @@ struct gsmd;
+ struct gsmd {
+ unsigned int flags;
+ int interpreter_ready;
+- struct gsmd_fd gfd_uart;
++ struct gsmd_uart uart;
+ struct gsmd_fd gfd_sock;
+ struct llparser llp;
+ struct llist_head users;
+@@ -81,9 +83,10 @@ struct gsmd {
+ struct gsmd_device_state dev_state;
+
+ struct llist_head operators; /* cached list of operator names */
+- unsigned char *mlbuf; /* ml_parse buffer */
++ char *mlbuf; /* ml_parse buffer */
+ unsigned int mlbuf_len;
+ int mlunsolicited;
++ int clear_to_send;
+ };
+
+ struct gsmd_user {
+diff --git a/include/gsmd/uart.h b/include/gsmd/uart.h
+new file mode 100644
+index 0000000..a006fa7
+--- /dev/null
++++ b/include/gsmd/uart.h
+@@ -0,0 +1,28 @@
++#ifndef __GSMD_UART_H
++#define __GSMD_UART_H
++
++#ifdef __GSMD__
++
++struct gsmd_port {
++ int (*write)(struct gsmd_port *port, const char data[], int len);
++ int (*set_break)(struct gsmd_port *port, int state);
++ /* more parameters here */
++ int (*newdata_cb)(void *opaque, const char data[], int len);
++ void *newdata_opaque;
++};
++
++struct gsmd_uart {
++ struct gsmd_port port;
++ struct gsmd_fd gfd;
++ char txfifo[2048];
++ int tx_start;
++ int tx_len;
++};
++
++extern int set_baudrate(int fd, int baudrate, int hwflow);
++extern void uart_drain(int fd);
++extern int uart_init(struct gsmd_uart *uart, int sockfd);
++
++#endif /* __GSMD__ */
++
++#endif
+diff --git a/include/gsmd/vendorplugin.h b/include/gsmd/vendorplugin.h
+index 1911fef..1c82790 100644
+--- a/include/gsmd/vendorplugin.h
++++ b/include/gsmd/vendorplugin.h
+@@ -11,8 +11,8 @@ struct gsmd_unsolicit;
+
+ struct gsmd_vendor_plugin {
+ struct llist_head list;
+- unsigned char *name;
+- unsigned char *ext_chars;
++ char *name;
++ char *ext_chars;
+ unsigned int num_unsolicit;
+ const struct gsmd_unsolicit *unsolicit;
+ int (*detect)(struct gsmd *g);
+diff --git a/src/gsmd/Makefile.am b/src/gsmd/Makefile.am
+index 9ac45ee..110b757 100644
+--- a/src/gsmd/Makefile.am
++++ b/src/gsmd/Makefile.am
+@@ -13,7 +13,7 @@ sbin_PROGRAMS = gsmd
+ gsmd_CFLAGS = -D PLUGINDIR=\"$(plugindir)\"
+ gsmd_SOURCES = gsmd.c atcmd.c select.c machine.c vendor.c unsolicited.c log.c \
+ usock.c talloc.c timer.c operator_cache.c ext_response.c \
+- sms_cb.c sms_pdu.c
++ sms_cb.c sms_pdu.c uart.c
+ gsmd_LDADD = -ldl
+ gsmd_LDFLAGS = -Wl,--export-dynamic
+
+diff --git a/src/gsmd/atcmd.c b/src/gsmd/atcmd.c
+index 2ef6a10..27dfa41 100644
+--- a/src/gsmd/atcmd.c
++++ b/src/gsmd/atcmd.c
+@@ -159,7 +159,8 @@ static int llparse_byte(struct llparser *llp, char byte)
+ return ret;
+ }
+
+-static int llparse_string(struct llparser *llp, char *buf, unsigned int len)
++static int llparse_string(struct llparser *llp, const char *buf,
++ unsigned int len)
+ {
+ while (len--) {
+ int rc = llparse_byte(llp, *(buf++));
+@@ -187,6 +188,55 @@ static int llparse_init(struct llparser *llp)
+ return 0;
+ }
+
++/* See if we can now send more commands to the port */
++static void atcmd_wake_queue(struct gsmd *g)
++{
++ int len, rc;
++ char *cr;
++
++ /* write pending commands to UART */
++ while (g->interpreter_ready && g->clear_to_send) {
++ struct gsmd_atcmd *pos, *pos2;
++ llist_for_each_entry_safe(pos, pos2, &g->pending_atcmds, list) {
++ cr = strchr(pos->cur, '\n');
++ if (cr)
++ len = cr - pos->cur;
++ else
++ len = pos->buflen;
++ rc = g->llp.port->write(g->llp.port, pos->cur, len);
++ if (rc == 0) {
++ gsmd_log(GSMD_ERROR,
++ "write returns 0, aborting\n");
++ break;
++ }
++ if (cr && rc == len)
++ rc ++; /* Skip the \n */
++ pos->buflen -= rc;
++ pos->cur += rc;
++ g->llp.port->write(g->llp.port, "\r", 1);
++
++ if (!pos->buflen) {
++ /* success: remove from global list of
++ * to-be-sent atcmds */
++ llist_del(&pos->list);
++ /* append to global list of executing atcmds */
++ llist_add_tail(&pos->list, &g->busy_atcmds);
++
++ /* we only send one cmd at the moment */
++ g->clear_to_send = 0;
++ break;
++ } else {
++ /* The write was short or the atcmd has more
++ * lines to send after a "> ". */
++ if (rc < len)
++ break;
++ g->clear_to_send = 0;
++ break;
++ }
++ }
++ }
++}
++
+ /* mid-level parser */
+
+ static int parse_final_result(const char *res)
+@@ -216,6 +266,7 @@ static int ml_parse(const char *buf, int len, void *ctx)
+ g->interpreter_ready = 1;
+ gsmd_initsettings(g);
+ gmsd_alive_start(g);
++ atcmd_wake_queue(g);
+ return 0;
+ }
+
+@@ -316,6 +367,7 @@ static int ml_parse(const char *buf, int len, void *ctx)
+ } else {
+ DEBUGP("Calling cmd->cb()\n");
+ cmd->resp = g->mlbuf;
++ g->mlbuf[g->mlbuf_len] = 0;
+ rc = cmd->cb(cmd, cmd->ctx, cmd->resp);
+ DEBUGP("Clearing mlbuf\n");
+ }
+@@ -370,12 +422,15 @@ static int ml_parse(const char *buf, int len, void *ctx)
+ if (g->mlbuf_len)
+ g->mlbuf[g->mlbuf_len ++] = '\n';
+ DEBUGP("Appending buf to mlbuf\n");
+- if (len > MLPARSE_BUF_SIZE - g->mlbuf_len)
++ if (len > MLPARSE_BUF_SIZE - g->mlbuf_len) {
+ len = MLPARSE_BUF_SIZE - g->mlbuf_len;
++ gsmd_log(GSMD_NOTICE, "g->mlbuf overrun\n");
++ }
+ memcpy(g->mlbuf + g->mlbuf_len, buf, len);
+ g->mlbuf_len += len;
+
+ if (g->mlunsolicited) {
++ g->mlbuf[g->mlbuf_len] = 0;
+ rc = unsolicited_parse(g, g->mlbuf, g->mlbuf_len,
+ strchr(g->mlbuf, ':') + 1);
+ if (rc == -EAGAIN) {
+@@ -422,8 +477,11 @@ final_cb:
+
+ /* if we're finished with current commands, but still have pending
+ * commands: we want to WRITE again */
+- if (llist_empty(&g->busy_atcmds) && !llist_empty(&g->pending_atcmds))
+- g->gfd_uart.when |= GSMD_FD_WRITE;
++ if (llist_empty(&g->busy_atcmds)) {
++ g->clear_to_send = 1;
++ if (!llist_empty(&g->pending_atcmds))
++ atcmd_wake_queue(g);
++ }
+
+ return rc;
+ }
+@@ -433,85 +491,23 @@ static int atcmd_prompt(void *data)
+ {
+ struct gsmd *g = data;
+
+- g->gfd_uart.when |= GSMD_FD_WRITE;
++ g->clear_to_send = 1;
++ atcmd_wake_queue(g);
+ }
+
+ /* callback to be called if [virtual] UART has some data for us */
+-static int atcmd_select_cb(int fd, unsigned int what, void *data)
++static int atcmd_newdata_cb(void *opaque, const char data[], int len)
+ {
+- int len, rc;
+- static char rxbuf[1024];
+- struct gsmd *g = data;
+- char *cr;
+-
+- if (what & GSMD_FD_READ) {
+- memset(rxbuf, 0, sizeof(rxbuf));
+- while ((len = read(fd, rxbuf, sizeof(rxbuf)))) {
+- if (len < 0) {
+- if (errno == EAGAIN)
+- return 0;
+- gsmd_log(GSMD_NOTICE, "ERROR reading from fd %u: %d (%s)\n", fd, len,
+- strerror(errno));
+- return len;
+- }
+- rc = llparse_string(&g->llp, rxbuf, len);
+- if (rc < 0) {
+- gsmd_log(GSMD_ERROR, "ERROR during llparse_string: %d\n", rc);
+- return rc;
+- }
+- }
+- }
+-
+- /* write pending commands to UART */
+- if ((what & GSMD_FD_WRITE) && g->interpreter_ready) {
+- struct gsmd_atcmd *pos, *pos2;
+- llist_for_each_entry_safe(pos, pos2, &g->pending_atcmds, list) {
+- cr = strchr(pos->cur, '\n');
+- if (cr)
+- len = cr - pos->cur;
+- else
+- len = pos->buflen - 1; /* assuming zero-terminated strings */
+- rc = write(fd, pos->cur, len);
+- if (rc == 0) {
+- gsmd_log(GSMD_ERROR, "write returns 0, aborting\n");
+- break;
+- } else if (rc < 0) {
+- gsmd_log(GSMD_ERROR, "error during write to fd %d: %d\n",
+- fd, rc);
+- return rc;
+- }
+- if (!cr || rc == len)
+- rc ++; /* Skip the \n or \0 */
+- pos->buflen -= rc;
+- pos->cur += rc;
+- write(fd, "\r", 1);
+-
+- if (!pos->buflen) {
+- /* success: remove from global list of
+- * to-be-sent atcmds */
+- llist_del(&pos->list);
+- /* append to global list of executing atcmds */
+- llist_add_tail(&pos->list, &g->busy_atcmds);
+-
+- /* we only send one cmd at the moment */
+- break;
+- } else {
+- /* The write was short or the atcmd has more
+- * lines to send after a "> ". */
+- if (rc < len)
+- return 0;
+- break;
+- }
+- }
++ struct gsmd *g = opaque;
++ int rc;
+
+- /* Either pending_atcmds is empty or a command has to wait */
+- g->gfd_uart.when &= ~GSMD_FD_WRITE;
+- }
++ rc = llparse_string(&g->llp, data, len);
++ if (rc < 0)
++ gsmd_log(GSMD_ERROR, "ERROR during llparse_string: %d\n", rc);
+
+- return 0;
++ return rc;
+ }
+
+-
+ struct gsmd_atcmd *atcmd_fill(const char *cmd, int rlen,
+ atcmd_cb_t cb, void *ctx, u_int16_t id)
+ {
+@@ -544,36 +540,18 @@ int atcmd_submit(struct gsmd *g, struct gsmd_atcmd *cmd)
+ {
+ DEBUGP("submitting command `%s'\n", cmd->buf);
+
+- if (llist_empty(&g->pending_atcmds))
+- g->gfd_uart.when |= GSMD_FD_WRITE;
++ llist_empty(&g->pending_atcmds);
+ llist_add_tail(&cmd->list, &g->pending_atcmds);
++ atcmd_wake_queue(g);
+
+ return 0;
+ }
+
+-void atcmd_drain(int fd)
+-{
+- int rc;
+- struct termios t;
+- rc = tcflush(fd, TCIOFLUSH);
+- rc = tcgetattr(fd, &t);
+- DEBUGP("c_iflag = 0x%08x, c_oflag = 0x%08x, c_cflag = 0x%08x, c_lflag = 0x%08x\n",
+- t.c_iflag, t.c_oflag, t.c_cflag, t.c_lflag);
+- t.c_iflag = t.c_oflag = 0;
+- cfmakeraw(&t);
+- rc = tcsetattr(fd, TCSANOW, &t);
+-}
+-
+ /* init atcmd parser */
+-int atcmd_init(struct gsmd *g, int sockfd)
++int atcmd_init(struct gsmd *g, struct gsmd_port *port)
+ {
+ __atcmd_ctx = talloc_named_const(gsmd_tallocs, 1, "atcmds");
+
+- g->gfd_uart.fd = sockfd;
+- g->gfd_uart.when = GSMD_FD_READ;
+- g->gfd_uart.data = g;
+- g->gfd_uart.cb = &atcmd_select_cb;
+-
+ INIT_LLIST_HEAD(&g->pending_atcmds);
+ INIT_LLIST_HEAD(&g->busy_atcmds);
+
+@@ -581,7 +559,9 @@ int atcmd_init(struct gsmd *g, int sockfd)
+
+ g->mlbuf_len = 0;
+ g->mlunsolicited = 0;
++ g->clear_to_send = 1;
+
++ g->llp.port = port;
+ g->llp.cur = g->llp.buf;
+ g->llp.len = sizeof(g->llp.buf);
+ g->llp.cb = &ml_parse;
+@@ -589,5 +569,8 @@ int atcmd_init(struct gsmd *g, int sockfd)
+ g->llp.ctx = g;
+ g->llp.flags = LGSM_ATCMD_F_EXTENDED;
+
+- return gsmd_register_fd(&g->gfd_uart);
++ port->newdata_opaque = g;
++ port->newdata_cb = atcmd_newdata_cb;
++
++ return 0;
+ }
+diff --git a/src/gsmd/gsmd.c b/src/gsmd/gsmd.c
+index 51b4f2c..846bd17 100644
+--- a/src/gsmd/gsmd.c
++++ b/src/gsmd/gsmd.c
+@@ -26,7 +26,6 @@
+ #include <string.h>
+ #include <errno.h>
+ #include <fcntl.h>
+-#include <termios.h>
+ #include <signal.h>
+
+ #define _GNU_SOURCE
+@@ -247,56 +246,6 @@ int gsmd_initsettings(struct gsmd *gsmd)
+ return atcmd_submit(gsmd, cmd);
+ }
+
+-struct bdrt {
+- int bps;
+- u_int32_t b;
+-};
+-
+-static struct bdrt bdrts[] = {
+- { 0, B0 },
+- { 9600, B9600 },
+- { 19200, B19200 },
+- { 38400, B38400 },
+- { 57600, B57600 },
+- { 115200, B115200 },
+- { 230400, B230400 },
+- { 460800, B460800 },
+- { 921600, B921600 },
+-};
+-
+-static int set_baudrate(int fd, int baudrate, int hwflow)
+-{
+- int i;
+- u_int32_t bd = 0;
+- struct termios ti;
+-
+- for (i = 0; i < ARRAY_SIZE(bdrts); i++) {
+- if (bdrts[i].bps == baudrate)
+- bd = bdrts[i].b;
+- }
+- if (bd == 0)
+- return -EINVAL;
+-
+- i = tcgetattr(fd, &ti);
+- if (i < 0)
+- return i;
+-
+- i = cfsetispeed(&ti, B0);
+- if (i < 0)
+- return i;
+-
+- i = cfsetospeed(&ti, bd);
+- if (i < 0)
+- return i;
+-
+- if (hwflow)
+- ti.c_cflag |= CRTSCTS;
+- else
+- ti.c_cflag &= ~CRTSCTS;
+-
+- return tcsetattr(fd, 0, &ti);
+-}
+-
+ static int gsmd_initialize(struct gsmd *g)
+ {
+ INIT_LLIST_HEAD(&g->users);
+@@ -478,14 +427,19 @@ int main(int argc, char **argv)
+ if (wait >= 0)
+ g.interpreter_ready = !wait;
+
+- if (atcmd_init(&g, fd) < 0) {
++ if (uart_init(&g.uart, fd) < 0) {
+ fprintf(stderr, "can't initialize UART device\n");
+ exit(1);
+ }
+
+- write(fd, "\r", 1);
+- sleep(1);
+- atcmd_drain(fd);
++ if (atcmd_init(&g, &g.uart.port) < 0) {
++ fprintf(stderr, "can't initialize AT parser\n");
++ exit(1);
++ }
++ write(fd, "\r", 1);
++ sleep(1);
++
++ uart_drain(fd);
+
+ if (usock_init(&g) < 0) {
+ fprintf(stderr, "can't open unix socket\n");
+diff --git a/src/gsmd/uart.c b/src/gsmd/uart.c
+new file mode 100644
+index 0000000..22a4a5c
+--- /dev/null
++++ b/src/gsmd/uart.c
+@@ -0,0 +1,202 @@
++/* Wrapper for the physical UART in a struct gsmd_port abstraction.
++ *
++ * Copyright (C) 2007 Openmoko, Inc.
++ * Written by Andrzej Zaborowski <andrew@openedhand.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 <string.h>
++#include <fcntl.h>
++#include <termios.h>
++#include <unistd.h>
++#include <errno.h>
++
++#include "gsmd.h"
++
++#include <gsmd/gsmd.h>
++
++void uart_drain(int fd)
++{
++ int rc;
++ struct termios t;
++ rc = tcflush(fd, TCIOFLUSH);
++ rc = tcgetattr(fd, &t);
++ DEBUGP(
++ "c_iflag = 0x%08x, c_oflag = 0x%08x, "
++ "c_cflag = 0x%08x, c_lflag = 0x%08x\n",
++ t.c_iflag, t.c_oflag, t.c_cflag, t.c_lflag);
++ t.c_iflag = t.c_oflag = 0;
++ cfmakeraw(&t);
++ rc = tcsetattr(fd, TCSANOW, &t);
++}
++
++struct bdrt {
++ int bps;
++ u_int32_t b;
++};
++
++static struct bdrt bdrts[] = {
++ { 0, B0 },
++ { 9600, B9600 },
++ { 19200, B19200 },
++ { 38400, B38400 },
++ { 57600, B57600 },
++ { 115200, B115200 },
++ { 230400, B230400 },
++ { 460800, B460800 },
++ { 921600, B921600 },
++};
++
++int set_baudrate(int fd, int baudrate, int hwflow)
++{
++ int i;
++ u_int32_t bd = 0;
++ struct termios ti;
++
++ for (i = 0; i < ARRAY_SIZE(bdrts); i++) {
++ if (bdrts[i].bps == baudrate)
++ bd = bdrts[i].b;
++ }
++ if (bd == 0)
++ return -EINVAL;
++
++ i = tcgetattr(fd, &ti);
++ if (i < 0)
++ return i;
++
++ i = cfsetispeed(&ti, B0);
++ if (i < 0)
++ return i;
++
++ i = cfsetospeed(&ti, bd);
++ if (i < 0)
++ return i;
++
++ if (hwflow)
++ ti.c_cflag |= CRTSCTS;
++ else
++ ti.c_cflag &= ~CRTSCTS;
++
++ return tcsetattr(fd, 0, &ti);
++}
++
++static int uart_select_cb(int fd, unsigned int what, void *data)
++{
++ struct gsmd_uart *uart = (struct gsmd_uart *) data;
++ static char rxbuf[2048];
++ int rc, len;
++
++ if ((what & GSMD_FD_READ) && uart->port.newdata_cb) {
++ while ((len = read(fd, rxbuf, sizeof(rxbuf)))) {
++ if (len < 0) {
++ if (errno == EAGAIN || errno == EINTR)
++ return 0;
++ gsmd_log(GSMD_NOTICE, "ERROR reading from "
++ "fd %u: %d (%s)\n", fd, errno,
++ strerror(errno));
++ return -errno;
++ }
++
++ rc = uart->port.newdata_cb(
++ uart->port.newdata_opaque,
++ rxbuf,
++ len);
++ if (rc < 0)
++ return rc;
++ }
++ }
++
++ /* Write pending data to UART. */
++ if ((what & GSMD_FD_WRITE) && uart->tx_len) {
++ while (uart->tx_start + uart->tx_len >= sizeof(uart->txfifo)) {
++ len = sizeof(uart->txfifo) - uart->tx_start;
++ rc = write(fd, &uart->txfifo[uart->tx_start], len);
++ if (rc < 0 && errno != EINTR) {
++ if (errno == EAGAIN)
++ return 0;
++ gsmd_log(GSMD_NOTICE, "ERROR writing "
++ "fd %u: %d (%s)\n", fd, errno,
++ strerror(errno));
++ return -errno;
++ }
++
++ if (rc > 0) {
++ uart->tx_start += rc;
++ uart->tx_len -= rc;
++ }
++ }
++ uart->tx_start &= sizeof(uart->txfifo) - 1;
++
++ while (uart->tx_len) {
++ rc = write(fd, &uart->txfifo[uart->tx_start],
++ uart->tx_len);
++ if (rc < 0 && errno != EINTR) {
++ if (errno == EAGAIN)
++ return 0;
++ gsmd_log(GSMD_NOTICE, "ERROR writing "
++ "fd %u: %d (%s)\n", fd, errno,
++ strerror(errno));
++ return -errno;
++ }
++
++ if (rc > 0) {
++ uart->tx_start += rc;
++ uart->tx_len -= rc;
++ }
++ }
++
++ /* If we reached here, there's no more data for the moment. */
++ uart->gfd.when &= ~GSMD_FD_WRITE;
++ }
++
++ return 0;
++}
++
++static int uart_write(struct gsmd_port *port, const char data[], int len)
++{
++ struct gsmd_uart *uart = (struct gsmd_uart *) port;
++ int start = (uart->tx_start + uart->tx_len) &
++ (sizeof(uart->txfifo) - 1);
++ int space = sizeof(uart->txfifo) - start;
++
++ if (uart->tx_len + len > sizeof(uart->txfifo))
++ len = sizeof(uart->txfifo) - uart->tx_len;
++
++ if (len)
++ uart->gfd.when |= GSMD_FD_WRITE;
++
++ if (len > space) {
++ memcpy(uart->txfifo + start, data, space);
++ memcpy(uart->txfifo, data + space, len - space);
++ } else
++ memcpy(uart->txfifo + start, data, len);
++
++ uart->tx_len += len;
++ return len;
++}
++
++int uart_init(struct gsmd_uart *uart, int sockfd)
++{
++ uart->gfd.fd = sockfd;
++ uart->gfd.when = GSMD_FD_READ;
++ uart->gfd.data = uart;
++ uart->gfd.cb = &uart_select_cb;
++
++ uart->port.write = uart_write;
++
++ return gsmd_register_fd(&uart->gfd);
++}
+--
+1.5.2.1
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 04:30:35 +0000