sysmo-bts
/
generic-poky
9
0
Fork 0
Code Pull Requests Releases Activity
generic-poky/meta-moblin/packages/linux/linux-moblin-2.6.33.2/linux-2.6.34-moorestown-gtm...

2396 lines
68 KiB
Diff
Raw Blame History

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
View Git Blame Copy Permalink