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Diffstat (limited to 'meta-moblin/packages/linux/linux-moblin-2.6.33.2/linux-2.6.34-moorestown-gtm501l-driver-1.2.patch')
-rw-r--r--meta-moblin/packages/linux/linux-moblin-2.6.33.2/linux-2.6.34-moorestown-gtm501l-driver-1.2.patch2395
1 files changed, 2395 insertions, 0 deletions
diff --git a/meta-moblin/packages/linux/linux-moblin-2.6.33.2/linux-2.6.34-moorestown-gtm501l-driver-1.2.patch b/meta-moblin/packages/linux/linux-moblin-2.6.33.2/linux-2.6.34-moorestown-gtm501l-driver-1.2.patch
new file mode 100644
index 000000000..206e49ed6
--- /dev/null
+++ b/meta-moblin/packages/linux/linux-moblin-2.6.33.2/linux-2.6.34-moorestown-gtm501l-driver-1.2.patch
@@ -0,0 +1,2395 @@
+Index: linux-2.6.33/drivers/spi/Kconfig
+===================================================================
+--- linux-2.6.33.orig/drivers/spi/Kconfig
++++ linux-2.6.33/drivers/spi/Kconfig
+@@ -335,6 +335,10 @@ config SPI_DW_PCI
+ #
+ comment "SPI Protocol Masters"
+
++config SPI_MRST_GTM501
++ tristate "SPI protocol driver for GTM501l"
++ depends on SPI_MRST
++
+ config SPI_SPIDEV
+ tristate "User mode SPI device driver support"
+ depends on EXPERIMENTAL
+Index: linux-2.6.33/drivers/spi/Makefile
+===================================================================
+--- linux-2.6.33.orig/drivers/spi/Makefile
++++ linux-2.6.33/drivers/spi/Makefile
+@@ -43,6 +43,7 @@ obj-$(CONFIG_SPI_SH_MSIOF) += spi_sh_ms
+ obj-$(CONFIG_SPI_STMP3XXX) += spi_stmp.o
+ obj-$(CONFIG_SPI_NUC900) += spi_nuc900.o
+ obj-$(CONFIG_SPI_MRST) += mrst_spi.o
++obj-$(CONFIG_SPI_MRST_GTM501) += gtm501l_spi.o
+
+ # special build for s3c24xx spi driver with fiq support
+ spi_s3c24xx_hw-y := spi_s3c24xx.o
+Index: linux-2.6.33/drivers/spi/gtm501l_spi.c
+===================================================================
+--- /dev/null
++++ linux-2.6.33/drivers/spi/gtm501l_spi.c
+@@ -0,0 +1,2029 @@
++/****************************************************************************
++ *
++ * Driver for the Option GTM501L spi modem.
++ *
++ * Copyright (C) 2008 Option International
++ * Copyright (C) 2008 Filip Aben <f.aben@option.com>
++ * Denis Joseph Barrow <d.barow@option.com>
++ * Jan Dumon <j.dumon@option.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
++ * USA
++ *
++ *
++ *
++ *****************************************************************************/
++
++#include <linux/version.h>
++#include <linux/module.h>
++#include <linux/tty.h>
++#include <linux/device.h>
++#include <linux/spi/spi.h>
++#include <linux/tty.h>
++#include <linux/kfifo.h>
++#include <linux/tty_flip.h>
++#include <linux/workqueue.h>
++#include <linux/timer.h>
++
++#include <linux/interrupt.h>
++#include <linux/irq.h>
++#include <linux/rfkill.h>
++#include <linux/netdevice.h>
++#include <linux/inetdevice.h>
++#include <linux/skbuff.h>
++#include <net/arp.h>
++#include <linux/ip.h>
++#include <linux/dmapool.h>
++#include <linux/gpio.h>
++#include <linux/sysfs.h>
++
++#include <asm/ipc_defs.h>
++
++#ifdef CONFIG_DEBUG_FS
++#include <linux/debugfs.h>
++#include <linux/ktime.h>
++#include <linux/spinlock.h>
++#endif
++
++#include "gtm501l_spi.h"
++#include <linux/spi/mrst_spi.h>
++
++/* various static variables */
++static struct tty_driver *tty_drv;
++static struct ktermios *gtm501l_termios[GTM501L_MAX_MINORS];
++static struct ktermios *gtm501l_termios_locked[GTM501L_MAX_MINORS];
++static struct lock_class_key gtm501l_key;
++static struct gtm501l_port_data *gtm501l_serial_ports[GTM501L_MAX_MINORS];
++
++/* Default port spec */
++static struct gtm501l_port_spec gtm501l_default_port_spec[] = {
++ { 1, GTM501L_PORT_SPEC_SERIAL, "Control" }, /* 0 */
++ { 1, GTM501L_PORT_SPEC_SERIAL, "NetAT" }, /* 1 */
++ { 1, GTM501L_PORT_SPEC_NET, "NetIP" }, /* 2 */
++ { 1, GTM501L_PORT_SPEC_SERIAL, "App" }, /* 3 */
++ { 1, GTM501L_PORT_SPEC_SERIAL, "App2" }, /* 4 */
++ { 1, GTM501L_PORT_SPEC_SERIAL, "PC/SC" }, /* 5 */
++ { 1, GTM501L_PORT_SPEC_SERIAL, "Modem" }, /* 6 */
++ { 1, GTM501L_PORT_SPEC_SERIAL, "Diag" }, /* 7 */
++ { 1, GTM501L_PORT_SPEC_SERIAL, "Logger" }, /* 8 */
++ { 0, GTM501L_PORT_SPEC_SERIAL, "" }, /* 9 */
++ { 1, GTM501L_PORT_SPEC_NET, "NetIP2" }, /* 10 */
++ { 0, GTM501L_PORT_SPEC_SERIAL, "" }, /* 11 */
++ { 0, GTM501L_PORT_SPEC_SERIAL, "" }, /* 12 */
++ { 0, GTM501L_PORT_SPEC_SERIAL, "" }, /* 13 */
++ { 0, GTM501L_PORT_SPEC_SERIAL, "" }, /* 14 */
++ { 0, GTM501L_PORT_SPEC_SERIAL, "" }, /* 15 */
++};
++
++/* Module load parameter */
++static int gpio_in = -1; /* GPIO interrupt input assignment, set default to -1 */
++static int backoff_enabled = 1; /* Enable the backoff timer */
++static int spi_b16 = 1; /* Enable 16bit SPI word length, otherwise use 8bit SPI word length */
++int gtm501l_debug = 0;
++
++/* temp debug variables */
++static int spi_err_count = 0;
++static unsigned int total_tty_write = 0;
++static unsigned int total_spi_write = 0;
++
++static unsigned char scratch_buf[GTM501L_TRANSFER_SIZE];
++
++static int reset_state = 1;
++
++/* prototype declarations */
++static void gtm501l_push_skb(struct gtm501l_port_data *port_data);
++static void gtm501l_net_init(struct net_device *net);
++static void gtm501l_spi_complete(void *ctx);
++static void _gtm501l_set_termios(struct tty_struct *tty, struct ktermios *old);
++static void gtm501l_throttle(struct tty_struct *tty);
++static void gtm501l_create_ports(struct gtm501l_device *gtm_dev,
++ struct gtm501l_port_spec *specs);
++/*static void gtm501l_pmic_init_voltages( void );*/
++static void gtm501l_pmic_set_wwanresetn( unsigned char level );
++static void gtm501l_pmic_set_wwandisablen( unsigned char level );
++
++void gtm501l_debug_printk(const char *function, int line, char *format, ...) {
++ va_list args;
++ int len;
++ char buffer[255];
++
++ len = snprintf(buffer, 255, DRVNAME " [%s:%d] ", function, line);
++
++ va_start(args, format);
++ vsnprintf(buffer + len, 255 - len, format, args);
++ va_end(args);
++
++ printk("%s", buffer);
++}
++
++#define __bswap_16(x) \
++ (__extension__ \
++ ({ register unsigned short int __v, __x = (x); \
++ __asm__ ("rorw $8, %w0" \
++ : "=r" (__v) \
++ : "0" (__x) \
++ : "cc"); \
++ __v; }))
++
++static inline void swap_buf(u16 *buf, int len) {
++ int n;
++ len = (len + 1) / 2;
++ n = (len + 7) / 8;
++ switch (len % 8) {
++ case 0: do { *buf = __bswap_16(*buf); buf++;
++ case 7: *buf = __bswap_16(*buf); buf++;
++ case 6: *buf = __bswap_16(*buf); buf++;
++ case 5: *buf = __bswap_16(*buf); buf++;
++ case 4: *buf = __bswap_16(*buf); buf++;
++ case 3: *buf = __bswap_16(*buf); buf++;
++ case 2: *buf = __bswap_16(*buf); buf++;
++ case 1: *buf = __bswap_16(*buf); buf++;
++ } while (--n > 0);
++ }
++}
++
++#ifdef CONFIG_DEBUG_FS
++
++static ssize_t gtm501l_read_gpio(struct file *file, char __user *user_buf, size_t count, loff_t *ppos)
++{
++ char buf[32];
++ unsigned int len = 0;
++ if (gpio_in >= 0) {
++ len += snprintf(buf+len, sizeof(buf)-len,
++ "GPIO%d = %d\n", gpio_in, (gpio_get_value(gpio_in))?1:0);
++ } else {
++ len += snprintf(buf+len, sizeof(buf)-len,
++ "GPIO unuse\n");
++ }
++ return simple_read_from_buffer(user_buf, count, ppos, buf, len);
++}
++
++static struct file_operations gtm501l_gpio_operations = {
++ .owner = THIS_MODULE,
++ .read = gtm501l_read_gpio,
++};
++
++static ssize_t gtm501l_read_pmic(struct file *file, char __user *user_buf, size_t count, loff_t *ppos)
++{
++ char buf[8];
++ unsigned int len = sprintf(buf, "%d\n", reset_state);
++
++ return simple_read_from_buffer(user_buf, count, ppos, buf, len);
++}
++
++static ssize_t gtm501l_write_pmic(struct file *file, const char __user *user, size_t count, loff_t *offset)
++{
++ reset_state = simple_strtoul(user, NULL, 0);
++ gtm501l_pmic_set_wwanresetn( reset_state );
++ gtm501l_pmic_set_wwandisablen( reset_state );
++ return count;
++}
++
++static struct file_operations gtm501l_pmic_operations = {
++ .owner = THIS_MODULE,
++ .read = gtm501l_read_pmic,
++ .write = gtm501l_write_pmic,
++};
++
++/**
++ * gtm501l_debugfs_init generates all debugfs file nodes.
++ * It initialized the frame statistic structure.
++ */
++static int gtm501l_debugfs_init(struct gtm501l_device *gtm_dev)
++{
++ gtm_dev->debugfs = debugfs_create_dir("gtm501l", NULL);
++ if (!gtm_dev->debugfs)
++ return -ENOMEM;
++
++ debugfs_create_file("gpio", S_IFREG | S_IRUGO,
++ gtm_dev->debugfs, NULL, &gtm501l_gpio_operations);
++ debugfs_create_file("pmic", S_IFREG | S_IRUGO,
++ gtm_dev->debugfs, NULL, &gtm501l_pmic_operations);
++ debugfs_create_u32("backoff_timer", S_IFREG | S_IRUGO,
++ gtm_dev->debugfs, &backoff_enabled);
++ debugfs_create_x32("flags", S_IFREG | S_IRUGO,
++ gtm_dev->debugfs, (unsigned int *)&gtm_dev->flags);
++#ifdef DEBUG
++ debugfs_create_x32("debug", S_IFREG | S_IRUGO,
++ gtm_dev->debugfs, &gtm501l_debug);
++#endif
++
++ return 0;
++}
++
++static void gtm501l_debugfs_remove(struct gtm501l_device *gtm_dev)
++{
++ if (gtm_dev->debugfs)
++ debugfs_remove_recursive(gtm_dev->debugfs);
++}
++#endif
++
++static __be32 gtm501l_get_ip_addr(struct net_device *net)
++{
++ struct in_device *in_dev;
++
++ if ((in_dev = __in_dev_get_rtnl(net)) != NULL) {
++ if(in_dev->ifa_list) {
++ return in_dev->ifa_list->ifa_local;
++ }
++ }
++
++ return 0;
++}
++
++/*
++static void gtm501l_pmic_init_voltages( void )
++{
++ struct ipc_pmic_reg_data reg_data;
++
++ reg_data.num_entries = 3;
++
++ // Set VDDQCNT
++
++ reg_data.pmic_reg_data[0].register_address = 0x037;
++ reg_data.pmic_reg_data[0].value = 0x07;
++
++ // Set YMX3GDCNT
++
++ reg_data.pmic_reg_data[1].register_address = 0x03c;
++ reg_data.pmic_reg_data[1].value = 0x47;
++
++ // Set CLKOUT
++
++ reg_data.pmic_reg_data[2].register_address = 0x021;
++ reg_data.pmic_reg_data[2].value = 0x00;
++ ipc_pmic_register_write(&reg_data, 0);
++
++}
++*/
++
++static void gtm501l_pmic_set_wwanresetn( unsigned char level )
++{
++ struct ipc_pmic_mod_reg_data mod_reg_data;
++
++ // WWAN_RESET_N is connected to COMMS_GPO5
++
++ mod_reg_data.num_entries = 1;
++ mod_reg_data.pmic_mod_reg_data[0].bit_map = 0x20;
++ mod_reg_data.pmic_mod_reg_data[0].register_address = 0x0f4;
++
++ if (level)
++ {
++ mod_reg_data.pmic_mod_reg_data[0].value = 0x20;
++ }
++ else
++ {
++ mod_reg_data.pmic_mod_reg_data[0].value = 0x00;
++ }
++
++ ipc_pmic_register_read_modify(&mod_reg_data);
++}
++
++static void gtm501l_pmic_set_wwandisablen( unsigned char level )
++{
++ struct ipc_pmic_mod_reg_data mod_reg_data;
++
++ // WWAN_DISABLE_N is connected to COMMS_GPO0
++
++ mod_reg_data.num_entries = 1;
++ mod_reg_data.pmic_mod_reg_data[0].bit_map = 0x01;
++ mod_reg_data.pmic_mod_reg_data[0].register_address = 0x0f4;
++
++ if (level)
++ {
++ mod_reg_data.pmic_mod_reg_data[0].value = 0x01;
++ }
++ else
++ {
++ mod_reg_data.pmic_mod_reg_data[0].value = 0x00;
++ }
++
++ ipc_pmic_register_read_modify(&mod_reg_data);
++}
++
++
++static void gtm501l_rx_netchar(struct gtm501l_net *gtm_net,
++ unsigned char *in_buf, int size)
++{
++ struct net_device *net = gtm_net->net;
++ unsigned int temp_bytes;
++ unsigned int buffer_offset = 0, n;
++ unsigned int frame_len;
++ unsigned char *tmp_rx_buf;
++ unsigned char c;
++ int header_invalid;
++
++ while(size) {
++ switch (gtm_net->rx_state) {
++ case WAIT_IP:
++ /* waiting for IP header. */
++ /* wanted bytes - size of ip header */
++ temp_bytes = (size < gtm_net->rx_buf_missing) ?
++ size : gtm_net->rx_buf_missing;
++
++ memcpy(((unsigned char *)(&gtm_net->rx_ip_hdr)) +
++ gtm_net->rx_buf_size, in_buf + buffer_offset,
++ temp_bytes);
++
++ gtm_net->rx_buf_size += temp_bytes;
++ buffer_offset += temp_bytes;
++ gtm_net->rx_buf_missing -= temp_bytes;
++ size -= temp_bytes;
++
++ if (!gtm_net->rx_buf_missing) {
++ /* header is complete allocate an sk_buffer and
++ * continue to WAIT_DATA */
++
++ header_invalid = 0;
++
++ frame_len = ntohs(gtm_net->rx_ip_hdr.tot_len);
++ if ((frame_len > GTM501L_DEFAULT_MRU) ||
++ (frame_len < sizeof(struct iphdr))) {
++ if(!gtm_net->sync_lost)
++ dev_err(&net->dev,
++ "Invalid frame length (%d)\n",
++ frame_len);
++ header_invalid = 1;
++ }
++
++ /* Validate destination address */
++ if (!header_invalid &&
++ (gtm501l_get_ip_addr(net) != gtm_net->rx_ip_hdr.daddr)) {
++ if(!gtm_net->sync_lost)
++ dev_err(&net->dev,
++ "Not our address (" NIPQUAD_FMT ")\n",
++ NIPQUAD(gtm_net->rx_ip_hdr.daddr));
++ header_invalid = 1;
++ }
++
++ if (header_invalid) {
++ /* This header is not valid, roll back
++ * for sizeof(header) bytes - 1 and
++ * wait for sync */
++ gtm_net->rx_state = WAIT_SYNC;
++ n = min(buffer_offset,
++ sizeof(struct iphdr) - 1);
++ buffer_offset -= n;
++ size += n;
++ continue;
++ }
++
++ /* Allocate an sk_buff */
++ gtm_net->rx_skb = dev_alloc_skb(frame_len);
++ if (!gtm_net->rx_skb) {
++ /* We got no receive buffer. */
++ //D1("ddcould not allocate memory");
++ gtm_net->rx_state = WAIT_SYNC;
++ return;
++ }
++
++ if(gtm_net->sync_lost) {
++ dev_info(&net->dev, "Back in sync. (%d stray bytes)\n",
++ gtm_net->sync_lost);
++ gtm_net->sync_lost = 0;
++ }
++
++ /* Here's where it came from */
++ gtm_net->rx_skb->dev = net;
++
++ /* Copy what we got so far. make room for iphdr
++ * after tail. */
++ tmp_rx_buf =
++ skb_put(gtm_net->rx_skb,
++ sizeof(struct iphdr));
++ memcpy(tmp_rx_buf, (char *)&(gtm_net->rx_ip_hdr),
++ sizeof(struct iphdr));
++
++ /* ETH_HLEN */
++ gtm_net->rx_buf_size = sizeof(struct iphdr);
++
++ gtm_net->rx_buf_missing =
++ frame_len - sizeof(struct iphdr);
++ gtm_net->rx_state = WAIT_DATA;
++ }
++ break;
++
++ case WAIT_DATA:
++ temp_bytes = (size < gtm_net->rx_buf_missing)
++ ? size : gtm_net->rx_buf_missing;
++
++ /* Copy the rest of the bytes that are left in the
++ * buffer into the waiting sk_buf. */
++ /* Make room for temp_bytes after tail. */
++ tmp_rx_buf = skb_put(gtm_net->rx_skb, temp_bytes);
++ memcpy(tmp_rx_buf, in_buf + buffer_offset, temp_bytes);
++
++ gtm_net->rx_buf_missing -= temp_bytes;
++ size -= temp_bytes;
++ buffer_offset += temp_bytes;
++ gtm_net->rx_buf_size += temp_bytes;
++ if (!gtm_net->rx_buf_missing) {
++ /* Packet is complete. Inject into stack. */
++ /* We have IP packet here */
++ gtm_net->rx_skb->protocol =
++ __constant_htons(ETH_P_IP);
++ /* don't check it */
++ gtm_net->rx_skb->ip_summed =
++ CHECKSUM_UNNECESSARY;
++
++ skb_reset_mac_header(gtm_net->rx_skb);
++
++ /* Ship it off to the kernel */
++ netif_rx(gtm_net->rx_skb);
++ /* No longer our buffer. */
++ gtm_net->rx_skb = NULL;
++
++ /* update out statistics */
++ STATS(net).rx_packets++;
++ STATS(net).rx_bytes += gtm_net->rx_buf_size;
++
++ gtm_net->rx_buf_size = 0;
++ gtm_net->rx_buf_missing = sizeof(struct iphdr);
++ gtm_net->rx_state = WAIT_IP;
++ }
++ break;
++
++ case WAIT_SYNC:
++ if(!gtm_net->sync_lost) {
++ dev_err(&net->dev, "Lost sync...\n");
++ }
++ gtm_net->sync_lost++;
++ /* Look for the next possible IP header */
++ c = *(in_buf + buffer_offset);
++ if(c >= 0x45 && c <= 0x4f) {
++ /* This might be the begin of a new ip pkt */
++ gtm_net->rx_state = WAIT_IP;
++ gtm_net->rx_buf_size = 0;
++ gtm_net->rx_buf_missing = sizeof(struct iphdr);
++ }
++ else {
++ size--;
++ buffer_offset++;
++ }
++ break;
++
++ default:
++ size--;
++ break;
++ }
++ }
++}
++
++/* mux functions */
++
++/* function that tells you how much characters you can feed to fill your mux buffer*/
++static inline int gtm501l_mux_to_demux(int count)
++{
++ int burst_cnt, remain_cnt;
++ if (count & 0x1) {
++ printk("Error - space in frame can't be an odd number\n");
++ return -1;
++ }
++ /* We've got 2 extra bytes of framing per 512 bytes of data */
++ burst_cnt = (count / (MUX_BURST_SIZE + 2)) * MUX_BURST_SIZE;
++ remain_cnt = count % (MUX_BURST_SIZE + 2);
++
++ if (remain_cnt > 2)
++ return remain_cnt - 2 + burst_cnt;
++ else
++ return burst_cnt + 1;
++}
++
++/* multiplexes the data into the output buffer. output buffer is expected to be large enough to fit the data. */
++static int gtm501l_mux_data(int chan_id, unsigned char *in_buf, int in_size,
++ unsigned char *out_buf)
++{
++ int odd, cnt, result_size = 0;
++
++ /* check for an odd number of bytes */
++ odd = in_size & 0x1;
++
++ /* make it even */
++ in_size &= ~1;
++
++ /* First fill up with as much burst frames as possible */
++ while (in_size) {
++
++ cnt = (in_size >= MUX_BURST_SIZE) ? MUX_BURST_SIZE : in_size;
++ *(out_buf + result_size) =
++ MUX_CONTROL_BYTE(chan_id, MUX_BURST_TRANSFER,
++ MUX_MASTER_TO_SLAVE);
++ //printk("Burst frame %d bytes\n", cnt);
++ result_size++;
++ *(out_buf + result_size) = cnt / 2;
++ result_size++;
++ memcpy(out_buf + result_size, in_buf, cnt);
++ result_size += cnt;
++ in_size -= cnt;
++ in_buf += cnt;
++ }
++
++ /* Then tackle the odd byte */
++ if (odd) {
++ *(out_buf + result_size) =
++ MUX_CONTROL_BYTE(chan_id, MUX_DATA_TRANSFER,
++ MUX_MASTER_TO_SLAVE);
++ result_size++;
++ *(out_buf + result_size) = *in_buf;
++ result_size++;
++
++ }
++
++ return result_size;
++}
++
++/* kfifo put theoretically cannot fail to copy all buffer here */
++void gtm501l_tty_insert_flip_string(struct gtm501l_serial *gtm_ser,
++ unsigned char *chars,size_t size)
++{
++ int chars_inserted;
++ int copylen;
++ struct tty_struct *tty;
++
++ if (gtm_ser && gtm_ser->tty) {
++ tty= gtm_ser->tty;
++ if (test_bit(TTY_THROTTLED, &tty->flags)) {
++ dprintk(DEBUG_TTY, "received %d bytes while throttled\n", size);
++ copylen=kfifo_in(gtm_ser->throttle_fifo,chars,size);
++ if(copylen!=size)
++ dprintk(DEBUG_TTY, "kfifo_put failed got %d expected %d\n",
++ copylen, size);
++ }
++ else {
++ chars_inserted=tty_insert_flip_string(tty, chars, size);
++ if(chars_inserted!=size) {
++
++ size -= chars_inserted;
++ copylen=kfifo_in(gtm_ser->throttle_fifo,
++ &chars[chars_inserted],
++ size);
++ if(copylen!=size)
++ dprintk(DEBUG_TTY, "%s kfifo_put failed got %d expected %d\n",
++ copylen, size);
++ }
++ /* The flip here should force the tty layer
++ * to throttle if neccessary
++ */
++ tty_flip_buffer_push(tty);
++ }
++ }
++
++}
++
++#define PORT_SPEC_FLAGS_ENABLED 0x80
++#define PORT_SPEC_FLAGS_TYPE_MASK 0x7f
++#define PORT_SPEC_FLAGS_SERIAL 0x01
++#define PORT_SPEC_FLAGS_NET 0x02
++
++static void gtm501l_decode_version_info(struct gtm501l_device *gtm_dev,
++ unsigned char *buf, int size)
++{
++ int i = 0, chan, flags;
++ u16 version;
++ u16 framelength;
++ struct gtm501l_port_spec *new_port_spec;
++
++ /* Protocol version */
++ memcpy(&version, buf + i, 2);
++ i += 2;
++
++ if(version != 0 || size != 260) {
++ /* Unknown version or size is wrong.. */
++ return;
++ }
++
++ /* Frame length */
++ memcpy(&framelength, buf + i, 2);
++ i += 2;
++
++ /* Channel descriptors */
++ new_port_spec = kzalloc(sizeof(struct gtm501l_port_spec) * 16, GFP_KERNEL);
++ for(chan = 0; chan < 16; chan++) {
++ flags = buf[i++];
++
++ if(flags | PORT_SPEC_FLAGS_ENABLED) {
++ new_port_spec[chan].enabled = 1;
++ switch(flags & PORT_SPEC_FLAGS_TYPE_MASK) {
++ case PORT_SPEC_FLAGS_SERIAL:
++ new_port_spec[chan].type = GTM501L_PORT_SPEC_SERIAL;
++ break;
++ case PORT_SPEC_FLAGS_NET:
++ new_port_spec[chan].type = GTM501L_PORT_SPEC_NET;
++ break;
++ default:
++ /* Unknown channel type: disable this channel */
++ new_port_spec[chan].enabled = 0;
++ }
++
++ /* Copy the name */
++ memcpy(&new_port_spec[chan].name, buf + i, 15);
++ }
++
++ i += 15;
++ }
++
++ /* Activate the new port spec */
++ gtm501l_create_ports(gtm_dev, new_port_spec);
++ kfree(new_port_spec);
++}
++
++
++/**
++ * gtm501l_demux walks through the received SPI message given in in_buf with the length size and copies all
++ * found data into the opened channels given in the gtm_dev structure. The SPI buffer length must be always
++ * a multiple of 2 bytes!
++ * It returns finally the real found useful data inside the SPI frame length
++ */
++static int gtm501l_demux(struct gtm501l_device *gtm_dev, unsigned char *in_buf,
++ int size)
++{
++ int i = 0, valid = 0, copy;
++ unsigned char temp;
++ struct gtm501l_port_data *port_data;
++ struct gtm501l_serial *gtm_ser = NULL;
++ struct gtm501l_net *gtm_net = NULL;
++ unsigned char old_dcd;
++
++ gtm_dev->empty_transfers++;
++
++ while (i < size) {
++ gtm_ser = NULL;
++ gtm_net = NULL;
++ copy = 0;
++
++ if(spi_b16)
++ swap_buf((u16 *)(in_buf + i), 2);
++
++ /* check for an end of frame sequence */
++ if((in_buf[i]==0) && (in_buf[i+1]==0)) break;
++
++ if(0 && in_buf[i] == 0xFF) { /* TODO: Fill in correct check for version info */
++ copy = in_buf[++i] * 2;
++ i++;
++ if(spi_b16)
++ swap_buf((u16 *)(in_buf + i), copy);
++ gtm501l_decode_version_info(gtm_dev, in_buf + i, copy);
++ i += copy;
++ continue;
++ }
++
++ /* verify valid packet */
++ temp = MUX_DEVICE(in_buf[i]);
++ if (temp != MUX_SLAVE_TO_MASTER) {
++ /*
++ * ##PH: That should never happen and should counted as errorness data
++ */
++ i += 2;
++ continue;
++ }
++
++#ifdef DEBUG
++ if(!valid && (i > 0) && (gtm501l_debug & DEBUG_DEMUX)) {
++ int j;
++ dprintk(DEBUG_DEMUX, "First valid byte found at offset %d\n", i);
++ for(j=0 ; j<i ; j++) printk("%.2X ", in_buf[j]);
++ printk("\n");
++ }
++#endif
++
++ valid = 1;
++
++ //dprintk(DEBUG_DEMUX, "Got valid mux bytes 0x%X 0x%X\n", in_buf[i], in_buf[i+1]);
++
++ /* verify valid channel */
++ temp = MUX_CHANNEL(in_buf[i]);
++ if (temp >= GTM501L_PORT_PER_DEV || !gtm_dev->port_data[temp]) {
++ i += 2;
++ continue;
++ }
++ port_data = gtm_dev->port_data[temp];
++
++ if (port_data->spec.type == GTM501L_PORT_SPEC_NET)
++ gtm_net = &port_data->type.net;
++ else if (port_data->spec.type == GTM501L_PORT_SPEC_SERIAL)
++ gtm_ser = &port_data->type.serial;
++ //dprintk(DEBUG_DEMUX, "For channel %d\n", temp);
++
++ /* start decoding data */
++ temp = MUX_BLOCK_TYPE(in_buf[i]);
++ if (temp == MUX_BURST_TRANSFER) {
++ copy = in_buf[++i] * 2;
++ if( 0 == copy ) copy = MUX_BURST_SIZE;
++ if(spi_b16)
++ swap_buf((u16 *)(in_buf + i + 1), copy);
++ } else if (temp == MUX_DATA_TRANSFER) {
++ copy = 1;
++ }
++
++ if (copy) {
++ gtm_dev->empty_transfers = 0;
++ //dprintk(DEBUG_DEMUX, "\tNeed to copy %d data bytes\n", copy);
++ /* regular data */
++ if( gtm_ser && gtm_ser->tty ) {
++ gtm501l_tty_insert_flip_string(gtm_ser, &in_buf[++i], copy);
++ }
++ else if (gtm_net) {
++/*
++ int j;
++ for(j=i+1;j<(i+1+copy);j++) printk("0x%.2X ", in_buf[j]);
++ printk("\n");
++*/
++ gtm501l_rx_netchar(gtm_net, &in_buf[++i], copy);
++ } else {
++ i++;
++ }
++
++ i += copy;
++ continue;
++ }
++
++ if (temp == MUX_CONTROL_TRANSFER) {
++ //dprintk(DEBUG_DEMUX, "Is a control byte\n");
++ /* control data */
++ temp = in_buf[i + 1];
++ if (MUX_LINK(temp)) {
++ set_bit(GTM501L_TX_FC,
++ &port_data->signal_state);
++ dprintk(DEBUG_DEMUX, "FC set\n");
++ } else {
++ clear_bit(GTM501L_TX_FC,
++ &port_data->signal_state);
++ dprintk(DEBUG_DEMUX, "FC cleared\n");
++ }
++
++ if (gtm_ser) {
++ old_dcd =
++ test_bit(GTM501L_DCD,
++ &port_data->signal_state);
++
++ if (MUX_DCD(temp)) {
++ set_bit(GTM501L_DCD,
++ &port_data->signal_state);
++ dprintk(DEBUG_DEMUX, "DCD set\n");
++ } else {
++ clear_bit(GTM501L_DCD,
++ &port_data->signal_state);
++ dprintk(DEBUG_DEMUX, "DCD cleared\n");
++ }
++ if (MUX_CTS(temp)) {
++ set_bit(GTM501L_CTS,
++ &port_data->signal_state);
++ dprintk(DEBUG_DEMUX, "CTS set\n");
++ } else {
++ clear_bit(GTM501L_CTS,
++ &port_data->signal_state);
++ dprintk(DEBUG_DEMUX, "CTS cleared\n");
++ }
++
++ if (MUX_DSR(temp)) {
++ set_bit(GTM501L_DSR,
++ &port_data->signal_state);
++ dprintk(DEBUG_DEMUX, "DSR set\n");
++ } else {
++ clear_bit(GTM501L_DSR,
++ &port_data->signal_state);
++ dprintk(DEBUG_DEMUX, "DSR cleared\n");
++ }
++
++ if (MUX_RI(temp)) {
++ set_bit(GTM501L_RI,
++ &port_data->signal_state);
++ dprintk(DEBUG_DEMUX, "RI set\n");
++ } else {
++ clear_bit(GTM501L_RI,
++ &port_data->signal_state);
++ dprintk(DEBUG_DEMUX, "RI cleared\n");
++ }
++
++ if (old_dcd
++ && !test_bit(GTM501L_DCD,
++ &port_data->signal_state))
++ if (gtm_ser->tty)
++ tty_hangup(gtm_ser->tty);
++ }
++
++ i += 2;
++ }
++
++ }
++ return i;
++}
++
++static int gtm501l_mux_flow_control(struct gtm501l_port_data *port_data,
++ unsigned char *out_buf)
++{
++ *out_buf =
++ MUX_CONTROL_BYTE(port_data->port_id, MUX_CONTROL_TRANSFER,
++ MUX_MASTER_TO_SLAVE);
++ *(out_buf + 1) =
++ (test_bit(GTM501L_DTR, &port_data->signal_state)
++ ? (1 << MUX_DTR_SHIFT) : 0)
++ | (test_bit(GTM501L_RTS, &port_data->signal_state)
++ ? (1 << MUX_RTS_SHIFT): 0)
++ | (test_bit(GTM501L_RX_FC, &port_data->signal_state)
++ ? (1 << MUX_LINK_SHIFT): 0);
++
++ return 2;
++}
++
++static void gtm501l_timer(unsigned long arg)
++{
++ struct tasklet_struct *tasklet = (struct tasklet_struct *)arg;
++ //printk("Timer fired\n");
++ tasklet_hi_schedule(tasklet);
++}
++
++/* gpio interrupt handler */
++
++static irqreturn_t gtm501l_gpio_interrupt(int irq, void *dev)
++{
++ struct gtm501l_device *gtm_dev = (struct gtm501l_device *)dev;
++ static int count = 0;
++
++ if(!gtm_dev || !test_bit(GTM501L_STATE_PRESENT, &gtm_dev->flags))
++ return IRQ_HANDLED;
++
++ /*
++ * Using the GPE layer it will set the
++ * irq to the requested gpio_in line
++ */
++
++ if(gtm_dev->stats) gtm_dev->stats->wait_finished(gtm_dev->frame_stats);
++
++ if (!(count % 5000))
++ dprintk(DEBUG_GPIO, "Scheduling\n");
++
++ if(!test_bit(GTM501L_STATE_IO_IN_PROGRESS, &gtm_dev->flags)) {
++
++ /* If we received no data for the last x
++ * frames, delay the next transfer */
++ if(gtm_dev->empty_transfers > GTM501L_MAX_EMPTY && backoff_enabled) {
++ if(!timer_pending(&gtm_dev->timer)) {
++ gtm_dev->timer.expires = jiffies + GTM501L_BACKOFF_TIMER;
++ gtm_dev->timer.function = gtm501l_timer;
++ gtm_dev->timer.data = (unsigned long)&gtm_dev->io_work_tasklet;
++ add_timer(&gtm_dev->timer);
++ }
++ }
++ else
++ tasklet_hi_schedule(&gtm_dev->io_work_tasklet);
++ }
++ else set_bit(GTM501L_STATE_IO_READY, &gtm_dev->flags);
++
++ count++;
++
++ return IRQ_HANDLED;
++}
++
++static int gtm501l_prepare_tx_buffer(struct gtm501l_device *gtm_dev)
++{
++ int tx_count = 0;
++ int i, j;
++ unsigned int temp_count;
++ struct gtm501l_port_data *port_data;
++ int round_robin_index;
++ unsigned char *tx_buffer;
++ int len;
++
++ if(gtm_dev->stats) gtm_dev->stats->encode_start_idle_finished(gtm_dev->frame_stats);
++
++ tx_buffer = gtm_dev->tx_buffer[gtm_dev->tx_buffer_used];
++
++ /* First add flow control events for all ports */
++ for (i = 0; i < GTM501L_PORT_PER_DEV; i++) {
++ port_data = gtm_dev->port_data[i];
++ if(!port_data)
++ continue;
++
++ if (test_and_clear_bit (GTM501L_UPDATE, &port_data->signal_state)) {
++ tx_count += gtm501l_mux_flow_control(port_data,
++ tx_buffer + tx_count);
++ }
++ }
++
++ /* assemble data from buffers from all ports */
++ round_robin_index = gtm_dev->round_robin_index;
++ for (j = round_robin_index; j <
++ (GTM501L_PORT_PER_DEV + round_robin_index) ; j++) {
++ i = j % GTM501L_PORT_PER_DEV;
++ port_data = gtm_dev->port_data[i];
++ if(!port_data)
++ continue;
++
++ /* check if this port is flow controlled */
++ if (test_bit(GTM501L_TX_FC, &port_data->signal_state))
++ continue;
++
++ /* check for data to be sent */
++ temp_count = gtm501l_mux_to_demux(GTM501L_TRANSFER_SIZE - tx_count);
++ temp_count = min(kfifo_len(port_data->tx_fifo), temp_count);
++ if (temp_count) {
++ len = kfifo_out(port_data->tx_fifo, scratch_buf, temp_count);
++#ifdef GTM501L_DEBUG
++ sprintf(debug_buff_name, "gtm501l tx buf port %d %d", i, len);
++ GTM501L_BUFFER_DUMP(debug_buff_name, scratch_buf, temp_count);
++#endif
++ tx_count += gtm501l_mux_data(i, scratch_buf, temp_count,
++ tx_buffer + tx_count);
++ total_spi_write += temp_count;
++ gtm_dev->empty_transfers = 0;
++ }
++ if( port_data->spec.type == GTM501L_PORT_SPEC_NET)
++ gtm501l_push_skb(port_data);
++ else if(port_data->type.serial.tty)
++ tty_wakeup(port_data->type.serial.tty);
++ }
++ gtm_dev->round_robin_index = gtm_dev->round_robin_index + 1;
++ if (gtm_dev->round_robin_index == GTM501L_PORT_PER_DEV)
++ gtm_dev->round_robin_index = 0;
++
++ /* End-Of-Frame marker */
++ temp_count = min(2, GTM501L_TRANSFER_SIZE - tx_count);
++ memset(tx_buffer + tx_count, 0, temp_count);
++ tx_count += temp_count;
++
++ if(spi_b16)
++ swap_buf((u16 *)(tx_buffer), tx_count);
++
++ gtm_dev->tx_count = tx_count;
++
++ if(gtm_dev->stats) gtm_dev->stats->encode_finished(gtm_dev->frame_stats, tx_count - temp_count);
++
++ return tx_count;
++}
++
++/* serial functions */
++static void gtm501l_io(unsigned long data)
++{
++ struct gtm501l_device *gtm_dev = (struct gtm501l_device *)data;
++ int retval;
++#ifdef GTM501L_DEBUG
++ char debug_buff_name[80];
++#endif
++
++ if (!test_bit(GTM501L_STATE_PRESENT, &gtm_dev->flags))
++ return;
++
++ if (!test_and_set_bit(GTM501L_STATE_IO_IN_PROGRESS, &gtm_dev->flags)) {
++ gtm501l_prepare_tx_buffer(gtm_dev);
++
++ if(gtm_dev->stats) gtm_dev->stats->transfer_start(gtm_dev->frame_stats);
++
++ spi_message_init(&gtm_dev->spi_msg);
++ gtm_dev->spi_msg.context = gtm_dev;
++ gtm_dev->spi_msg.complete = gtm501l_spi_complete;
++ gtm_dev->spi_msg.is_dma_mapped = 1;
++
++ /* set up our spi transfer */
++ gtm_dev->spi_xfer.len = GTM501L_TRANSFER_SIZE;
++ gtm_dev->spi_xfer.cs_change = 0;
++#if 0
++ gtm_dev->tx_dma[gtm_dev->tx_buffer_used] =
++ dma_map_single(&gtm_dev->spi_dev->dev, gtm_dev->tx_buffer[gtm_dev->tx_buffer_used],
++ GTM501L_TRANSFER_SIZE, DMA_TO_DEVICE);
++ gtm_dev->rx_dma = dma_map_single(&gtm_dev->spi_dev->dev, gtm_dev->rx_buffer,
++ GTM501L_TRANSFER_SIZE, DMA_FROM_DEVICE);
++#else
++ gtm_dev->tx_dma[gtm_dev->tx_buffer_used] = virt_to_phys(gtm_dev->tx_buffer[gtm_dev->tx_buffer_used]);
++ gtm_dev->rx_dma = virt_to_phys(gtm_dev->rx_buffer);
++#endif
++
++ gtm_dev->spi_xfer.tx_dma = gtm_dev->tx_dma[gtm_dev->tx_buffer_used];
++ gtm_dev->spi_xfer.tx_buf = gtm_dev->tx_buffer[gtm_dev->tx_buffer_used];
++ gtm_dev->tx_buffer_used = (++gtm_dev->tx_buffer_used) % 2;
++ gtm_dev->tx_count = 0;
++
++ gtm_dev->spi_xfer.rx_dma = gtm_dev->rx_dma;
++ gtm_dev->spi_xfer.rx_buf = gtm_dev->rx_buffer;
++
++ spi_message_add_tail(&gtm_dev->spi_xfer, &gtm_dev->spi_msg);
++
++ retval = spi_async(gtm_dev->spi_dev, &gtm_dev->spi_msg);
++
++ if (retval) {
++ dprintk(DEBUG_SPI, "ERROR: spi_async failed (%d)\n", retval);
++ clear_bit(GTM501L_STATE_IO_IN_PROGRESS,
++ &gtm_dev->flags);
++ tasklet_hi_schedule(&gtm_dev->io_work_tasklet);
++ return;
++ }
++ } else {
++ dprintk(DEBUG_SPI, "ERROR - gtm501l_io called, but spi still busy\n");
++ }
++
++}
++
++static ssize_t gtm501l_sysfs_channel(struct device *dev, struct device_attribute *attr,
++ char *buf)
++{
++ struct gtm501l_port_data *port_data = NULL;
++ int i;
++
++ /* Look for the port_data matching this device. */
++ if(strcmp("tty", dev->class->name) == 0) {
++ for (i = 0; i < GTM501L_MAX_MINORS; i++) {
++ if (gtm501l_serial_ports[i] &&
++ gtm501l_serial_ports[i]->type.serial.dev == dev) {
++ port_data = gtm501l_serial_ports[i];
++ break;
++ }
++ }
++ }
++ else if(strcmp("net", dev->class->name) == 0) {
++ port_data = net_to_gtm501l_data(to_net_dev(dev));
++ }
++
++ return sprintf(buf, "%s\n", (port_data ? port_data->spec.name : "unknown"));
++}
++
++static DEVICE_ATTR(channel, S_IRUGO, gtm501l_sysfs_channel, NULL);
++
++static void gtm501l_free_port(struct gtm501l_port_data *port_data)
++{
++ /* do device type specific cleanup */
++ if (port_data->spec.type == GTM501L_PORT_SPEC_SERIAL) {
++ /* serial device cleanup */
++ device_remove_file(port_data->type.serial.dev, &dev_attr_channel);
++ gtm501l_serial_ports[port_data->type.serial.minor] = 0;
++ tty_unregister_device(tty_drv, port_data->type.serial.minor);
++ kfifo_free(port_data->type.serial.throttle_fifo);
++ } else if (port_data->spec.type == GTM501L_PORT_SPEC_NET) {
++ /* net device cleanup */
++ device_remove_file(&port_data->type.net.net->dev, &dev_attr_channel);
++ unregister_netdev(port_data->type.net.net);
++ free_netdev(port_data->type.net.net);
++ }
++
++ /* do common device deinitialization */
++ kfifo_free(port_data->tx_fifo);
++ kfree(port_data);
++}
++
++static int gtm501l_get_free_port(void)
++{
++ int i;
++
++ for (i = 0; i < GTM501L_MAX_MINORS; i++) {
++ if (!gtm501l_serial_ports[i])
++ return i;
++ }
++ return -1;
++}
++
++static void gtm501l_create_ports(struct gtm501l_device *gtm_dev,
++ struct gtm501l_port_spec *specs)
++{
++ struct net_device *net;
++ struct gtm501l_serial *gtm_ser;
++ struct gtm501l_port_data *port_data = NULL;
++ int minor = -1;
++ int i;
++ int status;
++
++ for(i = 0; i < GTM501L_PORT_PER_DEV; i++) {
++ port_data = gtm_dev->port_data[i];
++
++ if(port_data) {
++ if(!specs[i].enabled) {
++ /* A port did exist, but it's gone now */
++ gtm501l_free_port(port_data);
++ gtm_dev->port_data[i] = NULL;
++ continue;
++ }
++ else if (specs[i].type == port_data->spec.type) {
++ /* Old and new port are of the same type,
++ * only update the name */
++ memcpy(&port_data->spec.name, &specs[i].name, 16);
++ continue;
++ }
++ else {
++ /* Old and new port have different types */
++ gtm501l_free_port(port_data);
++ gtm_dev->port_data[i] = NULL;
++ }
++ }
++
++ /* If this port is not enabled, skip it */
++ if(!specs[i].enabled) {
++ continue;
++ }
++
++ dprintk(DEBUG_INIT, "%d: (%d) %s\n", i, specs[i].type, specs[i].name);
++
++ port_data = kzalloc(sizeof(struct gtm501l_port_data), GFP_KERNEL);
++ if (!port_data)
++ continue;
++
++ memcpy(&port_data->spec, &specs[i], sizeof(struct gtm501l_port_spec));
++
++ spin_lock_init(&port_data->fifo_lock);
++ lockdep_set_class_and_subclass(&port_data->fifo_lock, &gtm501l_key, 0);
++
++ /* common initialization */
++ port_data->spi_itf = gtm_dev;
++ port_data->port_id = i;
++ port_data->tx_fifo =
++ status = kfifo_alloc(port_data->tx_fifo, GTM501L_FIFO_SIZE, GFP_KERNEL);
++ if (status) {
++ printk(KERN_ERR "GTM501 failed kfifo tx alloc %d\n", status);
++ kfree(port_data);
++ continue;
++ }
++ /* device specific initialization */
++ if (port_data->spec.type == GTM501L_PORT_SPEC_SERIAL) {
++ /* serial device */
++ if ((minor = gtm501l_get_free_port()) == -1) {
++ kfree(port_data);
++ continue;
++ }
++ gtm_ser = &port_data->type.serial;
++ gtm_ser->minor = minor;
++ gtm_ser->dev =
++ tty_register_device(tty_drv, minor,
++ &gtm_dev->spi_dev->dev);
++ if (!gtm_ser->dev) {
++ dprintk(DEBUG_INIT, "Registering tty device failed\n");
++ kfree(port_data);
++ continue;
++ }
++ gtm501l_serial_ports[minor] = port_data;
++ spin_lock_init(&gtm_ser->throttle_fifo_lock);
++ lockdep_set_class_and_subclass(&gtm_ser->throttle_fifo_lock, &gtm501l_key, 0);
++ status = kfifo_alloc(gtm_ser->throttle_fifo, GTM501l_THROTTLE_FIFO_SIZE,
++ GFP_KERNEL);
++ if (status) {
++ tty_unregister_device(tty_drv,
++ gtm_ser->minor);
++ kfree(port_data);
++ continue;
++ }
++
++ if (device_create_file(gtm_ser->dev, &dev_attr_channel))
++ dev_err(gtm_ser->dev, "Could not create sysfs file for channel\n");
++ }
++ else if (port_data->spec.type == GTM501L_PORT_SPEC_NET) {
++ /* net device */
++ net = alloc_netdev(sizeof(struct gtm501l_port_data *), "gtm%d",
++ gtm501l_net_init);
++ if (!net) {
++ kfifo_free(port_data->tx_fifo);
++ kfree(port_data);
++ continue;
++ }
++
++ *((struct gtm501l_port_data **)netdev_priv(net)) = port_data;
++ port_data->type.net.net = net;
++
++ if (register_netdev(net)) {
++ free_netdev(net);
++ kfifo_free(port_data->tx_fifo);
++ kfree(port_data);
++ continue;
++ }
++
++ if (device_create_file(&net->dev, &dev_attr_channel))
++ dev_err(&net->dev, "Could not create sysfs file for channel\n");
++ }
++
++ gtm_dev->port_data[i] = port_data;
++
++ }
++}
++
++static void gtm501l_free_device(struct kref *ref)
++{
++ int i;
++ struct gtm501l_device *gtm_dev =
++ container_of(ref, struct gtm501l_device, ref);
++ struct gtm501l_port_data *port_data;
++
++ tasklet_kill(&gtm_dev->io_work_tasklet);
++
++ for (i = 0; i < GTM501L_PORT_PER_DEV; i++) {
++ port_data = gtm_dev->port_data[i];
++ if(port_data)
++ gtm501l_free_port(port_data);
++ }
++#ifdef CONFIG_DEBUG_FS
++ gtm501l_debugfs_remove(gtm_dev);
++#endif
++ kfree(gtm_dev);
++}
++
++static void gtm501l_spi_complete(void *ctx)
++{
++ struct gtm501l_device *gtm_dev = (struct gtm501l_device *)ctx;
++ unsigned int rx_count = 0;
++
++ if(gtm_dev->stats) {
++ gtm_dev->stats->transfer_finished_wait_start(gtm_dev->frame_stats);
++ gtm_dev->stats->transfer_decode_start(gtm_dev->frame_stats);
++ }
++
++ /* did we get removed meanwhile ? */
++ if (!test_bit(GTM501L_STATE_PRESENT, &gtm_dev->flags))
++ return;
++
++ if (!gtm_dev->spi_msg.status) {
++#if 0
++ dma_unmap_single(&gtm_dev->spi_dev->dev,
++ gtm_dev->tx_dma[(gtm_dev->tx_buffer_used + 1) % 2],
++ GTM501L_TRANSFER_SIZE, DMA_TO_DEVICE);
++ dma_unmap_single(&gtm_dev->spi_dev->dev, gtm_dev->rx_dma,
++ GTM501L_TRANSFER_SIZE, DMA_FROM_DEVICE);
++#endif
++ rx_count = gtm501l_demux(gtm_dev, gtm_dev->rx_buffer,
++ gtm_dev->spi_msg.actual_length);
++ } else {
++ spi_err_count++;
++ printk("SPI transfer error %d - (%d)\n",
++ gtm_dev->spi_msg.status, spi_err_count);
++ }
++
++ if(gtm_dev->stats) gtm_dev->stats->decode_finished_may_idle_start(gtm_dev->frame_stats, rx_count);
++
++ clear_bit(GTM501L_STATE_IO_IN_PROGRESS, &gtm_dev->flags);
++
++ //gtm501l_prepare_tx_buffer(gtm_dev);
++
++ if(test_and_clear_bit(GTM501L_STATE_IO_READY, &gtm_dev->flags))
++ tasklet_hi_schedule(&gtm_dev->io_work_tasklet);
++}
++
++/* char/tty operations */
++
++static void gtm501l_throttle(struct tty_struct *tty)
++{
++ struct gtm501l_port_data *port_data =
++ (struct gtm501l_port_data *)tty->driver_data;
++
++ func_enter();
++
++ if (port_data) {
++ func_exit();
++ return;
++ }
++
++ if(!test_bit(GTM501L_RX_FC, &port_data->signal_state)) {
++ set_bit(GTM501L_RX_FC, &port_data->signal_state);
++ set_bit(GTM501L_UPDATE, &port_data->signal_state);
++ }
++
++ func_exit();
++}
++
++/* To be checked... I can't remember the exact details but the hso driver
++ * needed a hso_unthrottle_tasklet to prevent hso_throttle being
++ * called recursively, I am not sure whether this can happen here.
++ */
++#define UNTHROTTLE_STACK_BUF_SIZE (512)
++static void gtm501l_unthrottle(struct tty_struct *tty)
++{
++ struct gtm501l_port_data *port_data =
++ (struct gtm501l_port_data *)tty->driver_data;
++ struct gtm501l_serial *gtm_ser;
++ int write_length_remaining, curr_write_len;
++ char stack_buff[UNTHROTTLE_STACK_BUF_SIZE];
++ struct gtm501l_device *gtm_dev = port_data->spi_itf;
++
++ func_enter();
++
++ if (!port_data) {
++ func_exit();
++ return;
++ }
++
++ gtm_ser=&port_data->type.serial;
++ write_length_remaining=kfifo_len(gtm_ser->throttle_fifo);
++ while (write_length_remaining) {
++ if (test_bit(TTY_THROTTLED, &tty->flags)) {
++ func_exit();
++ return;
++ }
++ curr_write_len = min(write_length_remaining,
++ UNTHROTTLE_STACK_BUF_SIZE);
++ curr_write_len = kfifo_out(gtm_ser->throttle_fifo,
++ stack_buff, curr_write_len);
++ curr_write_len = tty_insert_flip_string
++ (tty, stack_buff,
++ curr_write_len);
++ write_length_remaining -= curr_write_len;
++ tty_flip_buffer_push(tty);
++ }
++
++ clear_bit(GTM501L_RX_FC, &port_data->signal_state);
++ set_bit(GTM501L_UPDATE, &port_data->signal_state);
++
++ /* If the timer is currently running, stop it and try to initiate a
++ * transfer immediately */
++ if(timer_pending(&gtm_dev->timer)) {
++ del_timer_sync(&gtm_dev->timer);
++ gtm501l_io((unsigned long)gtm_dev);
++ }
++
++ func_exit();
++}
++
++static int gtm501l_tiocmget(struct tty_struct *tty, struct file *filp)
++{
++ unsigned int value;
++ struct gtm501l_port_data *port_data =
++ (struct gtm501l_port_data *)tty->driver_data;
++
++ func_enter();
++
++ if (!port_data) {
++ func_exit();
++ return 0;
++ }
++
++ value =
++ (test_bit(GTM501L_RTS, &port_data->signal_state) ? TIOCM_RTS : 0) |
++ (test_bit(GTM501L_DTR, &port_data->signal_state) ? TIOCM_DTR : 0) |
++ (test_bit(GTM501L_CTS, &port_data->signal_state) ? TIOCM_CTS : 0) |
++ (test_bit(GTM501L_DSR, &port_data->signal_state) ? TIOCM_DSR : 0) |
++ (test_bit(GTM501L_DCD, &port_data->signal_state) ? TIOCM_CAR : 0) |
++ (test_bit(GTM501L_RI, &port_data->signal_state) ? TIOCM_RNG : 0);
++
++ func_exit();
++ return value;
++}
++
++static int gtm501l_tiocmset(struct tty_struct *tty, struct file *filp,
++ unsigned int set, unsigned int clear)
++{
++ struct gtm501l_port_data *port_data =
++ (struct gtm501l_port_data *)tty->driver_data;
++
++ func_enter();
++
++ if (!port_data) {
++ func_exit();
++ return -ENODEV;
++ }
++
++ if (set & TIOCM_RTS)
++ set_bit(GTM501L_RTS, &port_data->signal_state);
++ if (set & TIOCM_DTR)
++ set_bit(GTM501L_DTR, &port_data->signal_state);
++
++ if (clear & TIOCM_RTS)
++ clear_bit(GTM501L_RTS, &port_data->signal_state);
++ if (clear & TIOCM_DTR)
++ clear_bit(GTM501L_DTR, &port_data->signal_state);
++
++ set_bit(GTM501L_UPDATE, &port_data->signal_state);
++
++ func_exit();
++ return 0;
++}
++
++static int gtm501l_open(struct tty_struct *tty, struct file *filp)
++{
++ struct gtm501l_serial *gtm_ser = NULL;
++ struct gtm501l_port_data *port_data;
++
++ func_enter();
++
++ if ((tty->index > GTM501L_MAX_MINORS)
++ || (!gtm501l_serial_ports[tty->index])) {
++ func_exit();
++ return -ENODEV;
++ }
++
++ port_data = gtm501l_serial_ports[tty->index];
++ gtm_ser = &port_data->type.serial;
++
++ if (!test_bit(GTM501L_STATE_PRESENT, &port_data->spi_itf->flags)) {
++ func_exit();
++ return -ENODEV;
++ }
++
++ gtm_ser->open++;
++ tty->driver_data = port_data;
++ tty->low_latency = 1;
++ gtm_ser->tty = tty;
++ _gtm501l_set_termios(tty, NULL);
++
++ /* signal_update_needed flag will be set by tiocmset */
++ clear_bit(GTM501L_RX_FC, &port_data->signal_state);
++ gtm501l_tiocmset(tty, filp, TIOCM_DTR | TIOCM_RTS, 0);
++
++ kref_get(&port_data->spi_itf->ref);
++ func_exit();
++ return 0;
++}
++
++static void gtm501l_close(struct tty_struct *tty, struct file *filp)
++{
++ struct gtm501l_serial *gtm_ser = NULL;
++ struct gtm501l_port_data *port_data =
++ (struct gtm501l_port_data *)tty->driver_data;
++
++ func_enter();
++
++ if ((tty->index > GTM501L_MAX_MINORS) || !port_data) {
++ func_exit();
++ return;
++ }
++
++ gtm_ser = &port_data->type.serial;
++
++ /*
++ * ugh, the refcounting... unfortunately open() & close()'s aren't always executed symmetrically.
++ * There are cases where after a failed open you can still get a close(). We can't handle those
++ * here. File a tty layer bug.
++ */
++ if(--gtm_ser->open >= 0) {
++ kref_put(&port_data->spi_itf->ref, gtm501l_free_device);
++ if( gtm_ser->open == 0) {
++ kfifo_reset(port_data->tx_fifo);
++ /* signal_update_needed flag will be set by tiocmset */
++ set_bit(GTM501L_RX_FC, &port_data->signal_state);
++ gtm501l_tiocmset(tty, filp, 0, TIOCM_DTR | TIOCM_RTS);
++ gtm_ser->tty = NULL;
++ }
++ } else gtm_ser->open = 0;
++
++ func_exit();
++}
++
++static int gtm501l_write(struct tty_struct *tty, const unsigned char *buf,
++ int count)
++{
++ struct gtm501l_port_data *port_data =
++ (struct gtm501l_port_data *)tty->driver_data;
++ struct gtm501l_serial *gtm_ser;
++ unsigned int tx_count;
++ unsigned char *tmp_buf = (unsigned char *)buf;
++ struct gtm501l_device *gtm_dev = port_data->spi_itf;
++
++ func_enter();
++
++ if (!port_data) {
++ func_exit();
++ return -ENODEV;
++ }
++
++ gtm_ser = &port_data->type.serial;
++
++ tx_count = kfifo_in(port_data->tx_fifo, tmp_buf, count);
++ total_tty_write+=tx_count;
++
++ /* If the timer is currently running, stop it and try to initiate a
++ * transfer immediately */
++ if(timer_pending(&gtm_dev->timer)) {
++ del_timer_sync(&gtm_dev->timer);
++ gtm501l_io((unsigned long)gtm_dev);
++ }
++
++ //printk("Write: wrote %d bytes in fifo (total = %d)\n", tx_count, total_tty_write);
++
++ func_exit();
++
++ return tx_count;
++}
++
++static int gtm501l_write_room(struct tty_struct *tty)
++{
++ struct gtm501l_port_data *port_data =
++ (struct gtm501l_port_data *)tty->driver_data;
++
++ if (!port_data) {
++ return -ENODEV;
++ }
++
++ //func_enter();
++
++ return GTM501L_FIFO_SIZE - kfifo_len(port_data->tx_fifo);
++}
++
++static void _gtm501l_set_termios(struct tty_struct *tty, struct ktermios *old)
++{
++ struct gtm501l_port_data *port_data =
++ (struct gtm501l_port_data *)tty->driver_data;
++ struct gtm501l_serial *serial;
++ struct ktermios *termios;
++
++ if ((!tty) || (!tty->termios) || (!port_data)) {
++ printk(KERN_ERR "%s: no tty structures", __func__);
++ return;
++ }
++
++ serial = &port_data->type.serial;
++ /*
++ * * The default requirements for this device are:
++ * */
++ termios = tty->termios;
++ termios->c_iflag &= ~(IGNBRK /* disable ignore break */
++ | BRKINT /* disable break causes interrupt */
++ | PARMRK /* disable mark parity errors */
++ | ISTRIP /* disable clear high bit of input characters */
++ | INLCR /* disable translate NL to CR */
++ | IGNCR /* disable ignore CR */
++ | ICRNL /* disable translate CR to NL */
++ | IXON); /* disable enable XON/XOFF flow control */
++
++ /* disable postprocess output characters */
++ termios->c_oflag &= ~OPOST;
++
++ termios->c_lflag &= ~(ECHO /* disable echo input characters */
++ | ECHONL /* disable echo new line */
++ | ICANON /* disable erase, kill, werase, and rprnt
++ special characters */
++ | ISIG /* disable interrupt, quit, and suspend special
++ characters */
++ | IEXTEN); /* disable non-POSIX special characters */
++
++ termios->c_cflag &= ~(CSIZE /* no size */
++ | PARENB /* disable parity bit */
++ | CBAUD /* clear current baud rate */
++ | CBAUDEX); /* clear current buad rate */
++ termios->c_cflag |= CS8; /* character size 8 bits */
++
++ tty_encode_baud_rate(serial->tty, 115200, 115200);
++ /*
++ * Force low_latency on; otherwise the pushes are scheduled;
++ * this is bad as it opens up the possibility of dropping bytes
++ * on the floor. We don't want to drop bytes on the floor. :)
++ */
++ serial->tty->low_latency = 1;
++ serial->tty->termios->c_cflag |= B115200; /* baud rate 115200 */
++ return;
++}
++
++static void gtm501l_set_termios(struct tty_struct *tty, struct ktermios *old)
++{
++ struct gtm501l_port_data *port_data =
++ (struct gtm501l_port_data *)tty->driver_data;
++ struct gtm501l_serial *serial;
++
++ func_enter();
++
++ if (!port_data) {
++ func_exit();
++ return;
++ }
++ serial = &port_data->type.serial;
++
++ /* the actual setup */
++ if (serial->tty)
++ _gtm501l_set_termios(tty, old);
++ else
++ tty->termios = old;
++
++ /* done */
++ func_exit();
++ return;
++}
++
++static int gtm501l_chars_in_buffer(struct tty_struct *tty)
++{
++ struct gtm501l_port_data *port_data =
++ (struct gtm501l_port_data *)tty->driver_data;
++
++ if (!port_data)
++ return -ENODEV;
++
++ //func_enter();
++
++ return kfifo_len(port_data->tx_fifo);
++}
++
++static struct mrst_spi_chip mrst_gtm501l = {
++ .poll_mode = 0,
++ .enable_dma = 1,
++ .type = SPI_FRF_SPI,
++};
++
++/* spi operations */
++
++static int gtm501l_spi_probe(struct spi_device *spi)
++{
++ struct gtm501l_device *gtm_dev;
++ int i;
++
++ func_enter();
++
++ /* we check here only the SPI mode and correct them, if needed */
++ if (GTM501L_SPI_MODE != (spi->mode & (SPI_CPHA | SPI_CPOL | SPI_CS_HIGH | SPI_LSB_FIRST | SPI_3WIRE))) {
++ pr_warning("%s: SPI mode wrong setup, found %d, correct to %d\n",
++ DRVNAME, spi->mode, GTM501L_SPI_MODE);
++ spi->mode = GTM501L_SPI_MODE | (SPI_LOOP & spi->mode);
++ }
++
++ if (spi->mode & SPI_LOOP) {
++ pr_warning("%s: SPI device in loop back\n", DRVNAME);
++ }
++
++ /* The Bit_per_word and the maximum speed has to be setup by us, the protocol driver */
++ if(spi_b16)
++ spi->bits_per_word = 16;
++ else
++ spi->bits_per_word = 8;
++
++ spi->max_speed_hz = GTM501L_SPI_SPEED;
++
++ spi->controller_data = &mrst_gtm501l;
++
++ if (spi_setup(spi)) {
++ pr_err("%s: SPI setup does wasn't successful\n", DRVNAME);
++ func_exit();
++ return -ENODEV;
++ }
++
++ /* initialize structure to hold our device variables */
++ gtm_dev = kzalloc(sizeof(struct gtm501l_device), GFP_ATOMIC);
++
++ if (!gtm_dev) {
++ func_exit();
++ return -ENOMEM;
++ }
++ gtm_dev->spi_dev = spi;
++ kref_init(&gtm_dev->ref);
++
++ /*initialize transfer and dma buffers */
++ for(i = 0; i < 2; i++) {
++ gtm_dev->tx_buffer[i] = kzalloc(GTM501L_TRANSFER_SIZE, GFP_KERNEL | GFP_DMA);
++ if( 0 == gtm_dev->tx_buffer[i]) {
++ pr_err("%s: DMA-TX[%d] buffer allocation failed\n", DRVNAME, i);
++ func_exit();
++ return -EIO;
++ }
++ }
++ gtm_dev->rx_buffer = kzalloc(GTM501L_TRANSFER_SIZE, GFP_KERNEL | GFP_DMA);
++ if( 0 == gtm_dev->rx_buffer) {
++ pr_err("%s: DMA-RX buffer allocation failed\n", DRVNAME);
++ func_exit();
++ return -EIO;
++ }
++
++ /* create our tty/net ports */
++ gtm501l_create_ports(gtm_dev, gtm501l_default_port_spec);
++
++ spi_set_drvdata(spi, gtm_dev);
++
++ tasklet_init(&gtm_dev->io_work_tasklet,
++ (void (*)(unsigned long))gtm501l_io,
++ (unsigned long)gtm_dev);
++
++ init_timer(&gtm_dev->timer);
++
++#ifdef CONFIG_DEBUG_FS
++ gtm501l_debugfs_init(gtm_dev);
++#endif
++
++ /*
++ * Init GPIO and IRQ, if at least the gpio parameter is set
++ */
++ if (gpio_in < 0)
++ gpio_in = GTM501L_GPIO0;
++
++ if (request_irq(spi->irq, gtm501l_gpio_interrupt, GTM501L_IRQ_TYPE,
++ "option", (void *)gtm_dev)) {
++ kref_put(&gtm_dev->ref, gtm501l_free_device);
++ func_exit();
++ return -EIO;
++ }
++
++ set_bit(GTM501L_STATE_PRESENT, &gtm_dev->flags);
++ /*
++ * Schedule tasklet once in case the gpio is active at probe time.
++ * Otherwise wait for the next interrupt
++ */
++ gtm501l_gpio_interrupt(spi->irq, (void *)gtm_dev);
++
++ func_exit();
++ return 0;
++}
++
++static int gtm501l_spi_remove(struct spi_device *spi)
++{
++ struct gtm501l_device *gtm_dev =
++ (struct gtm501l_device *)spi_get_drvdata(spi);
++
++ func_enter();
++
++ del_timer_sync(&gtm_dev->timer);
++
++ clear_bit(GTM501L_STATE_PRESENT, &gtm_dev->flags);
++ free_irq(spi->irq, gtm_dev);
++ kfree(gtm_dev->tx_buffer[0]);
++ kfree(gtm_dev->tx_buffer[1]);
++ kfree(gtm_dev->rx_buffer);
++ spi_set_drvdata(spi, NULL);
++ kref_put(&gtm_dev->ref, gtm501l_free_device);
++
++ func_exit();
++ return 0;
++}
++
++static void gtm501l_spi_shutdown(struct spi_device *spi)
++{
++ func_enter();
++}
++
++static int gtm501l_spi_suspend(struct spi_device *spi, pm_message_t msg)
++{
++ func_enter();
++ return 0;
++}
++
++static int gtm501l_spi_resume(struct spi_device *spi)
++{
++ func_enter();
++ return 0;
++}
++
++static struct tty_operations gtm501l_serial_ops = {
++ .open = gtm501l_open,
++ .close = gtm501l_close,
++ .write = gtm501l_write,
++ .write_room = gtm501l_write_room,
++ .set_termios = gtm501l_set_termios,
++ .chars_in_buffer = gtm501l_chars_in_buffer,
++ .tiocmget = gtm501l_tiocmget,
++ .tiocmset = gtm501l_tiocmset,
++ .throttle = gtm501l_throttle,
++ .unthrottle = gtm501l_unthrottle
++};
++
++static struct spi_driver gtm501l_spi_driver = {
++ .driver = {
++ .name = "spi_opt_modem",
++ .bus = &spi_bus_type,
++ .owner = THIS_MODULE
++ },
++ .probe = gtm501l_spi_probe,
++ .remove = __devexit_p(gtm501l_spi_remove),
++ .shutdown = gtm501l_spi_shutdown,
++ .suspend = gtm501l_spi_suspend,
++ .resume = gtm501l_spi_resume,
++};
++
++/* module exit point */
++static void __exit gtm501l_exit(void)
++{
++ func_enter();
++ tty_unregister_driver(tty_drv);
++ spi_unregister_driver(&gtm501l_spi_driver);
++ dprintk(DEBUG_CLEANUP, "GTM501L driver removed\n");
++ func_exit();
++}
++
++/* module entry point */
++static int __init gtm501l_init(void)
++{
++ int result = 0;
++
++ func_enter();
++
++/* gtm501l_pmic_init_voltages();*/
++ gtm501l_pmic_set_wwandisablen(1);
++
++ gtm501l_pmic_set_wwanresetn(0);
++ msleep(100);
++ gtm501l_pmic_set_wwanresetn(1);
++
++ memset(gtm501l_serial_ports, 0, sizeof(gtm501l_serial_ports));
++ memset(gtm501l_termios, 0, sizeof(gtm501l_termios));
++ memset(gtm501l_termios_locked, 0, sizeof(gtm501l_termios_locked));
++
++ /* initialize lower-edge tty driver */
++ tty_drv = alloc_tty_driver(GTM501L_MAX_MINORS);
++ if (!tty_drv) {
++ func_exit();
++ return -ENOMEM;
++ }
++
++ tty_drv->magic = TTY_DRIVER_MAGIC;
++ tty_drv->owner = THIS_MODULE;
++ tty_drv->driver_name = "gtm501l";
++ tty_drv->name = "ttyGTM";
++ tty_drv->minor_start = 0;
++ tty_drv->num = GTM501L_MAX_MINORS;
++ tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
++ tty_drv->subtype = SERIAL_TYPE_NORMAL;
++ tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
++ tty_drv->init_termios = tty_std_termios;
++ tty_drv->init_termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
++ tty_drv->termios = gtm501l_termios;
++ tty_drv->termios_locked = gtm501l_termios_locked;
++
++ tty_set_operations(tty_drv, &gtm501l_serial_ops);
++
++ result = tty_register_driver(tty_drv);
++ if (result) {
++ printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
++ __func__, result);
++ func_exit();
++ return result;
++ }
++
++ /*
++ initialize upper-edge spi driver. needs to be done after tty initialization because the spi probe will
++ race
++ */
++ result = spi_register_driver(&gtm501l_spi_driver);
++ if (result) {
++ printk(KERN_ERR "%s - spi_register_driver failed(%d)\n",
++ __func__, result);
++ tty_unregister_driver(tty_drv);
++ func_exit();
++ return result;
++ }
++
++ dprintk(DEBUG_INIT, "GTM501L driver initialized successfully\n");
++ func_exit();
++ return 0;
++}
++
++static int gtm501l_net_open(struct net_device *net)
++{
++ struct gtm501l_port_data *port_data = net_to_gtm501l_data(net);
++
++ func_enter();
++
++ port_data->type.net.rx_state = WAIT_IP;
++ port_data->type.net.sync_lost = 0;
++ port_data->type.net.rx_buf_size = 0;
++ port_data->type.net.rx_buf_missing = sizeof(struct iphdr);
++
++ /* update remote side it's ok to send us data */
++ clear_bit(GTM501L_RX_FC, &port_data->signal_state);
++ set_bit(GTM501L_UPDATE, &port_data->signal_state);
++ netif_start_queue(net);
++ func_exit();
++ return 0;
++}
++
++static int gtm501l_net_close(struct net_device *net)
++{
++ struct gtm501l_port_data *port_data = net_to_gtm501l_data(net);
++
++ func_enter();
++
++ /* stop remote side from sending us data */
++ set_bit(GTM501L_RX_FC, &port_data->signal_state);
++ set_bit(GTM501L_UPDATE, &port_data->signal_state);
++ netif_stop_queue(net);
++ func_exit();
++ return 0;
++}
++
++static void gtm501l_push_skb(struct gtm501l_port_data *port_data)
++{
++ struct gtm501l_net *gtm_net = &port_data->type.net;
++ struct sk_buff *skb = gtm_net->tx_skb;
++ unsigned int len;
++
++ func_enter();
++
++ if (skb && gtm_net->net->flags & IFF_UP) {
++ len = kfifo_in(port_data->tx_fifo, skb->data, skb->len);
++ skb_pull(skb, len);
++ if (skb->len == 0) {
++ // dev_kfree_skb(skb); // TODO: This causes a crash...
++ gtm_net->tx_skb = NULL;
++ netif_start_queue(gtm_net->net);
++ }
++ }
++
++ func_exit();
++}
++
++static int gtm501l_net_start_xmit(struct sk_buff *skb, struct net_device *net)
++{
++ int result = 0;
++ struct gtm501l_port_data *port_data = net_to_gtm501l_data(net);
++ struct gtm501l_net *gtm_net = &port_data->type.net;
++
++ func_enter();
++
++ netif_stop_queue(net);
++
++ if (gtm_net->tx_skb) {
++ printk(KERN_ERR "%s tx_skb not null\n", __func__);
++ result = -EIO;
++ } else {
++ gtm_net->tx_skb = skb;
++ gtm501l_push_skb(port_data);
++ }
++ if (result) {
++ STATS(net).tx_errors++;
++ netif_start_queue(net);
++ } else {
++ STATS(net).tx_packets++;
++ STATS(net).tx_bytes += skb->len;
++ /* And tell the kernel when the last transmit started. */
++ net->trans_start = jiffies;
++ }
++ /* we're done */
++ func_exit();
++ return result;
++}
++
++#ifndef NETDEVICE_HAS_STATS
++static struct net_device_stats *gtm501l_net_get_stats(struct net_device *net)
++{
++ return &STATS(net);
++}
++#endif
++
++/* called when a packet did not ack after watchdogtimeout */
++static void gtm501l_net_tx_timeout(struct net_device *net)
++{
++ func_enter();
++
++ /* Tell syslog we are hosed. */
++ dev_warn(&net->dev, "Tx timed out.\n");
++
++ /* Update statistics */
++ STATS(net).tx_errors++;
++
++ func_exit();
++}
++
++static const struct net_device_ops gtm501l_netdev_ops = {
++ .ndo_open = gtm501l_net_open,
++ .ndo_stop = gtm501l_net_close,
++ .ndo_start_xmit = gtm501l_net_start_xmit,
++#ifndef NETDEVICE_HAS_STATS
++ .ndo_get_stats = gtm501l_net_get_stats,
++#endif
++ .ndo_tx_timeout = gtm501l_net_tx_timeout,
++};
++
++static void gtm501l_net_init(struct net_device *net)
++{
++ func_enter();
++
++ /* fill in the other fields */
++ net->netdev_ops = &gtm501l_netdev_ops;
++ net->watchdog_timeo = GTM501L_NET_TX_TIMEOUT;
++ net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
++ net->type = ARPHRD_NONE;
++ net->mtu = GTM501L_DEFAULT_MTU;
++ net->tx_queue_len = 10;
++
++ func_exit();
++}
++
++struct gtm501l_device *gtm501l_set_stats_ops(struct gtm501_stats_ops *stats)
++{
++ struct gtm501l_device *gtm_dev = NULL;
++ int i;
++
++ /* Look for gtm_dev */
++ for (i = 0; i < GTM501L_MAX_MINORS; i++) {
++ if (gtm501l_serial_ports[i] &&
++ gtm501l_serial_ports[i]->spi_itf) {
++ gtm_dev = gtm501l_serial_ports[i]->spi_itf;
++ break;
++ }
++ }
++
++ if(gtm_dev)
++ gtm_dev->stats = stats;
++
++ return gtm_dev;
++}
++
++/* module definitions */
++module_init(gtm501l_init);
++module_exit(gtm501l_exit);
++
++module_param_named(backoff, backoff_enabled, uint, S_IRUGO);
++MODULE_PARM_DESC(backoff, "Enable (1) or disable (0) backoff timer.");
++
++module_param_named(gpi, gpio_in, uint, S_IRUGO);
++MODULE_PARM_DESC(gpi, "GPIO input base address. (default: -1 => automatic)");
++
++module_param_named(b16, spi_b16, bool, S_IRUGO);
++MODULE_PARM_DESC(b16, "SPI 16Bit/word or 8Bit/word, default 16Bit");
++
++#ifdef DEBUG
++module_param_named(debug, gtm501l_debug, uint, S_IRUGO);
++MODULE_PARM_DESC(debug, "Debug flags");
++#endif
++
++MODULE_AUTHOR("Option Wireless");
++MODULE_DESCRIPTION("GTM501L spi driver");
++MODULE_LICENSE("GPL");
++MODULE_INFO(Version, "0.5pre1-option");
++
++EXPORT_SYMBOL_GPL(gtm501l_debug);
++EXPORT_SYMBOL_GPL(gtm501l_debug_printk);
++EXPORT_SYMBOL_GPL(gtm501l_set_stats_ops);
++
+Index: linux-2.6.33/drivers/spi/gtm501l_spi.h
+===================================================================
+--- /dev/null
++++ linux-2.6.33/drivers/spi/gtm501l_spi.h
+@@ -0,0 +1,329 @@
++/****************************************************************************
++ *
++ * Driver for the Option GTM501L spi modem.
++ *
++ * Copyright (C) 2008 Option International
++ * Copyright (C) 2008 Filip Aben <f.aben@option.com>
++ * Denis Joseph Barrow <d.barow@option.com>
++ * Jan Dumon <j.dumon@option.com>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 as
++ * published by the Free Software Foundation.
++ *
++ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
++ * USA
++ *
++ *
++ *
++ *****************************************************************************/
++
++#ifndef _GTM501L_SPI_H
++#define _GTM501L_SPI_H
++#include <linux/version.h>
++#include <linux/tty.h>
++#include <linux/device.h>
++#include <linux/spi/spi.h>
++
++#include <linux/netdevice.h>
++#include <linux/ip.h>
++
++#define DRVNAME "gtm501l"
++
++#define DEBUG
++
++#ifdef DEBUG
++#define DEBUG_FLOW (1 << 0)
++#define DEBUG_INIT (1 << 1)
++#define DEBUG_CLEANUP (1 << 2)
++#define DEBUG_TTY (1 << 3)
++#define DEBUG_NET (1 << 4)
++#define DEBUG_MUX (1 << 5)
++#define DEBUG_DEMUX (1 << 6)
++#define DEBUG_SPI (1 << 7)
++#define DEBUG_GPIO (1 << 8)
++
++#define dprintk(f, str...) if(gtm501l_debug & f) gtm501l_debug_printk(__func__, __LINE__, str)
++
++#define GTM501L_BUFFER_DUMP(prefix_str,buf,len) \
++ print_hex_dump(KERN_DEBUG,prefix_str, DUMP_PREFIX_OFFSET,16,1,buf,len,1)
++
++void gtm501l_debug_printk(const char *function, int line, char *format, ...);
++extern int gtm501l_debug;
++
++#else
++#define dprintk(f, str...)
++#define GTM501L_BUFFER_DUMP(prefix_str,buf,len)
++#endif
++
++#define func_enter() dprintk(DEBUG_FLOW, "enter\n")
++#define func_exit() dprintk(DEBUG_FLOW, "exit\n")
++
++#define GTM501L_DEFAULT_MTU 1500
++#define GTM501L_DEFAULT_MRU 2500
++#define GTM501L_NET_TX_TIMEOUT (HZ * 10)
++
++#define GTM501L_IRQ_TYPE IRQ_TYPE_EDGE_FALLING
++#define GTM501L_GPIO_TARGET 0
++#define GTM501L_GPIO0 0x3c /* default use Langwell GPIO60 */
++
++/* various macro definitions */
++#define GTM501L_MAX_MINORS 256
++#define GTM501L_PORT_PER_DEV 16
++#define GTM501L_TRANSFER_SIZE 2040
++/* GTM501l_THROTTLE_FIFO_SIZE must be a power of 2
++ * & larger than GTM501L_TRANSFER_SIZE */
++#define GTM501l_THROTTLE_FIFO_SIZE 4096
++#define GTM501L_FIFO_SIZE 4096
++
++/* device flags bitfield definitions */
++#define GTM501L_STATE_PRESENT 0
++#define GTM501L_STATE_IO_IN_PROGRESS 1
++#define GTM501L_STATE_IO_READY 2
++
++#define MUX_CHANNEL(x) ((x >> MUX_CHANNEL_SHIFT) & 0xF)
++#define MUX_CHANNEL_SHIFT 0
++#define MUX_BLOCK_TYPE(x) ((x >> MUX_BLOCK_TYPE_SHIFT) & 0x3)
++#define MUX_BLOCK_TYPE_SHIFT 4
++#define MUX_DEVICE(x) ((x >> MUX_DEVICE_SHIFT) & 0x3)
++#define MUX_DEVICE_SHIFT 6
++#define MUX_BURST_SIZE 512
++
++#define MUX_DATA_TRANSFER 0
++#define MUX_BURST_TRANSFER 1
++#define MUX_CONTROL_TRANSFER 2
++
++#define MUX_CONTROL_BYTE(channel,type,device) ( \
++ (channel<<MUX_CHANNEL_SHIFT) | \
++ (type<<MUX_BLOCK_TYPE_SHIFT) | \
++ (device<<MUX_DEVICE_SHIFT) \
++ )
++
++#define MUX_DCD(x) ((x >> MUX_DCD_SHIFT) & 0x1)
++#define MUX_DCD_SHIFT 0
++#define MUX_CTS(x) ((x >> MUX_CTS_SHIFT) & 0x1)
++#define MUX_CTS_SHIFT 1
++#define MUX_DSR(x) ((x >> MUX_DSR_SHIFT) & 0x1)
++#define MUX_DSR_SHIFT 2
++#define MUX_RI(x) ((x >> MUX_RI_SHIFT) & 0x1)
++#define MUX_RI_SHIFT 3
++#define MUX_DTR(x) ((x >> MUX_DTR_SHIFT) & 0x1)
++#define MUX_DTR_SHIFT 4
++#define MUX_RTS(x) ((x >> MUX_RTS_SHIFT) & 0x1)
++#define MUX_RTS_SHIFT 5
++#define MUX_LINK(x) ((x >> MUX_LINK_SHIFT) & 0x1)
++#define MUX_LINK_SHIFT 7
++
++#define MUX_INVALID 0
++#define MUX_SLAVE_TO_MASTER 1
++#define MUX_MASTER_TO_SLAVE 2
++#define MUX_INVALID2 3
++
++#define GTM501L_SPI_MODE SPI_MODE_1 /* SPI Mode 1 currently used */
++
++#define GTM501L_SPI_SPEED 12500000
++
++/* flow control bitfields */
++#define GTM501L_DCD 0
++#define GTM501L_CTS 1
++#define GTM501L_DSR 2
++#define GTM501L_RI 3
++#define GTM501L_DTR 4
++#define GTM501L_RTS 5
++#define GTM501L_TX_FC 6
++#define GTM501L_RX_FC 7
++#define GTM501L_UPDATE 8
++
++#define GTM501L_MAX_EMPTY 500
++#define GTM501L_BACKOFF_TIMER (HZ / 2)
++
++struct gtm501l_device {
++ struct spi_device *spi_dev;
++ struct kref ref;
++ struct gtm501l_port_data *port_data[GTM501L_PORT_PER_DEV];
++ struct tasklet_struct io_work_tasklet;
++ unsigned long flags;
++ dma_addr_t rx_dma;
++ dma_addr_t tx_dma[2];
++
++ unsigned char *rx_buffer;
++ unsigned char *tx_buffer[2];
++ int tx_buffer_used;
++ int tx_count;
++
++ struct spi_message spi_msg;
++ struct spi_transfer spi_xfer;
++
++ int gpio_irq;
++ int round_robin_index;
++
++ struct timer_list timer;
++ int empty_transfers;
++
++#ifdef CONFIG_DEBUG_FS
++ struct dentry *debugfs; /* debugfs parent directory */
++ struct gtm501l_frame_stats *frame_stats;
++#endif
++
++ struct gtm501_stats_ops *stats;
++};
++
++struct gtm501l_serial {
++ struct device *dev;
++ struct tty_struct *tty;
++ struct kfifo *throttle_fifo;
++ spinlock_t throttle_fifo_lock;
++ int minor;
++ int open;
++};
++
++enum rx_parse_state {
++ syncing,
++ getting_frame_len,
++ filling_skb,
++ WAIT_IP,
++ WAIT_DATA,
++ WAIT_SYNC
++};
++
++#undef NETDEVICE_HAS_STATS
++
++struct gtm501l_net {
++ enum rx_parse_state rx_state;
++ int sync_lost;
++ struct sk_buff *tx_skb;
++ struct sk_buff *rx_skb;
++ unsigned short rx_frame_len;
++ struct net_device *net;
++ unsigned short rx_buf_size;
++ unsigned short rx_buf_missing;
++ struct iphdr rx_ip_hdr;
++#ifndef NETDEVICE_HAS_STATS
++ struct net_device_stats stats;
++#endif
++};
++
++#define GTM501L_PORT_SPEC_SERIAL 0
++#define GTM501L_PORT_SPEC_NET 1
++
++struct gtm501l_port_spec {
++ int enabled;
++ int type;
++ char name[16];
++};
++
++struct gtm501l_port_data {
++ struct gtm501l_device *spi_itf;
++ int port_id;
++ struct gtm501l_port_spec spec;
++ struct kfifo *tx_fifo;
++ spinlock_t fifo_lock;
++ unsigned long signal_state;
++ union {
++ struct gtm501l_serial serial;
++ struct gtm501l_net net;
++ } type;
++};
++
++#define net_to_gtm501l_data(net) *((struct gtm501l_port_data **)netdev_priv(net))
++
++#ifdef NETDEVICE_HAS_STATS
++#define STATS(net) ((net)->stats)
++#else
++#define STATS(net) (((struct gtm501l_port_data *)net_to_gtm501l_data(net))->type.net.stats)
++#endif
++
++#ifdef CONFIG_DEBUG_FS
++
++/**
++ * transfer SPI frame sequence, can be used for global sequence state or for per CPU seq state variable
++ */
++enum gtm501l_fsequence { /* frame sequence start states */
++ none, /* undefined state */
++ idle, /* idle state host driver waits */
++ encode, /* encoding SPI frame */
++ encode_interrupt_decode, /* encoding SPI frame started and interrupts decoding frame */
++ decode, /* decoding SPI frame */
++ decode_interrupt_encode /* decoding SPI frame started and interrupts decoding frame */
++};
++
++/**
++ * job time with the support for interrupt time correction, which me be used only for encoding and decoding time
++ * measurements
++ */
++struct gtm501l_jtime { /* job time */
++ ktime_t start; /* start time for that job */
++ ktime_t correct; /* correction time, if job was interrupted */
++ u32 dt; /* delta time need for that job in us */
++ u32 min_dt; /* min time need for that job is us */
++ u32 max_dt; /* max time need for that job is us */
++ u64 total; /* total time need for that job is us */
++ u32 bug; /* bug counter for negative time delta */
++};
++
++/**
++ * frame statistics
++ */
++struct gtm501l_frame_stats { /* frame transfer statistics */
++ spinlock_t lock; /* lock for that structure */
++ enum gtm501l_fsequence seq[NR_CPUS]; /* current sequence for each CPU separate */
++ struct gtm501l_jtime idle; /* timings for idle, just waiting for the application or GTM501L become busy */
++ struct gtm501l_jtime encode; /* timings for encoding SPI frame */
++ struct gtm501l_jtime transceive; /* timings for tranceiving SPI frame */
++ struct gtm501l_jtime decode; /* timings for decoding SPI frame */
++ struct gtm501l_jtime wait; /* timings for waiting for GTM501L become ready */
++ struct gtm501l_jtime cycle; /* timings for a SPI frame cycle without idle time */
++ struct kfifo *transmit_id_pipe; /* fifo pipe frame id to transmit task */
++ struct kfifo *decode_id_pipe; /* fifo pipe frame id to decode task */
++ struct kfifo *decode_txb_pipe; /* fifo pipe number of transmit byte to decode task for analysis */
++ struct kfifo *decode_dt_pipe; /* fifo pipe SPI frame transfer time to decode task for analysis */
++ u32 transmit_id; /* id and number of transmit SPI frames */
++ u32 receive_id; /* id and number of received SPI frames */
++ u32 encode_start_id; /* id and number of started encoded frames */
++ u32 encode_end_id; /* id and number of finished encoded frames */
++ u32 decode_start_id; /* id and number of started decoded frames */
++ u32 decode_end_id; /* id and number of started decoded frames */
++ u32 idles; /* number of entered idle states */
++ u32 waits; /* number of entered wait states */
++ u32 max_tx_bytes; /* maximum transmitted bytes in a frame */
++ u32 max_rx_bytes; /* maximum received bytes in a frame */
++ u64 total_tx_bytes; /* total transmitted bytes in a frame for calculating average */
++ u64 total_rx_bytes; /* total received bytes in a frame for calculating average */
++ u32 first_tx_bytes; /* first transmitted bytes in a frame for calculating average */
++ u32 first_rx_bytes; /* first received bytes in a frame for calculating average */
++ u32 max_tx_rate; /* maximum transmitted bytes per time rate in bytes/sec */
++ u32 max_rx_rate; /* maximum received bytes per time rate in bytes/sec */
++ u32 encode_pass_decode; /* encode task pass decode task */
++ u32 encode_interrupts_decode; /* encode task interrupts decode task on the same CPU */
++ u32 decode_pass_encode; /* decode task pass encode task */
++ u32 decode_interrupts_encode; /* decode task interrupts encode task on the same CPU */
++ u32 encode_bug; /* number of counted bugs for encode process */
++ int encode_buffers_used; /* number of need encode buffers */
++ u32 decode_bug; /* number of counted bugs for the decode process */
++ int decode_buffers_used; /* number of need decode buffers */
++ struct dentry *debugfs; /* debugfs entry for the frame_stats file */
++};
++
++#endif
++
++struct gtm501_stats_ops {
++ void (*wait_finished)(struct gtm501l_frame_stats *fstats);
++ void (*encode_start_idle_finished)(struct gtm501l_frame_stats *fstats);
++ void (*encode_finished)(struct gtm501l_frame_stats *fstats, unsigned int tx_bytes);
++ void (*transfer_start)(struct gtm501l_frame_stats *fstats);
++ void (*transfer_finished_wait_start)(struct gtm501l_frame_stats *fstats);
++ void (*transfer_decode_start)(struct gtm501l_frame_stats *fstats);
++ void (*decode_finished_may_idle_start)(struct gtm501l_frame_stats *fstats, unsigned int rx_bytes);
++};
++
++/* Prototypes */
++struct gtm501l_device *gtm501l_set_stats_ops(struct gtm501_stats_ops *stats);
++
++#endif
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