ACPI: use macro to replace hard number

[safe/jmp/linux-2.6] / drivers / char / synclink_gt.c

diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c
index 8511e2e..08911ed 100644 (file)
--- a/drivers/char/synclink_gt.c
+++ b/drivers/char/synclink_gt.c
@@ -47,7 +47,6 @@
 
 
 #include <linux/module.h>
-#include <linux/version.h>
 #include <linux/errno.h>
 #include <linux/signal.h>
 #include <linux/sched.h>
@@ -128,17 +127,14 @@ static int slgt_device_count;
 static int ttymajor;
 static int debug_level;
 static int maxframe[MAX_DEVICES];
-static int dosyncppp[MAX_DEVICES];
 
 module_param(ttymajor, int, 0);
 module_param(debug_level, int, 0);
 module_param_array(maxframe, int, NULL, 0);
-module_param_array(dosyncppp, int, NULL, 0);
 
 MODULE_PARM_DESC(ttymajor, "TTY major device number override: 0=auto assigned");
 MODULE_PARM_DESC(debug_level, "Debug syslog output: 0=disabled, 1 to 5=increasing detail");
 MODULE_PARM_DESC(maxframe, "Maximum frame size used by device (4096 to 65535)");
-MODULE_PARM_DESC(dosyncppp, "Enable synchronous net device, 0=disable 1=enable");
 
 /*
  * tty support and callbacks
@@ -303,7 +299,7 @@ struct slgt_info {
        u32 idle_mode;
        u32 max_frame_size;       /* as set by device config */
 
-       unsigned int raw_rx_size;
+       unsigned int rbuf_fill_level;
        unsigned int if_mode;
 
        /* device status */
@@ -349,7 +345,6 @@ struct slgt_info {
        /* SPPP/Cisco HDLC device parts */
 
        int netcount;
-       int dosyncppp;
        spinlock_t netlock;
 #if SYNCLINK_GENERIC_HDLC
        struct net_device *netdev;
@@ -2676,8 +2671,31 @@ static int tx_abort(struct slgt_info *info)
 static int rx_enable(struct slgt_info *info, int enable)
 {
        unsigned long flags;
-       DBGINFO(("%s rx_enable(%d)\n", info->device_name, enable));
+       unsigned int rbuf_fill_level;
+       DBGINFO(("%s rx_enable(%08x)\n", info->device_name, enable));
        spin_lock_irqsave(&info->lock,flags);
+       /*
+        * enable[31..16] = receive DMA buffer fill level
+        * 0 = noop (leave fill level unchanged)
+        * fill level must be multiple of 4 and <= buffer size
+        */
+       rbuf_fill_level = ((unsigned int)enable) >> 16;
+       if (rbuf_fill_level) {
+               if ((rbuf_fill_level > DMABUFSIZE) || (rbuf_fill_level % 4)) {
+                       spin_unlock_irqrestore(&info->lock, flags);
+                       return -EINVAL;
+               }
+               info->rbuf_fill_level = rbuf_fill_level;
+               rx_stop(info); /* restart receiver to use new fill level */
+       }
+
+       /*
+        * enable[1..0] = receiver enable command
+        * 0 = disable
+        * 1 = enable
+        * 2 = enable or force hunt mode if already enabled
+        */
+       enable &= 3;
        if (enable) {
                if (!info->rx_enabled)
                        rx_start(info);
@@ -3382,7 +3400,6 @@ static void add_device(struct slgt_info *info)
        if (info->line < MAX_DEVICES) {
                if (maxframe[info->line])
                        info->max_frame_size = maxframe[info->line];
-               info->dosyncppp = dosyncppp[info->line];
        }
 
        slgt_device_count++;
@@ -3444,7 +3461,7 @@ static struct slgt_info *alloc_dev(int adapter_num, int port_num, struct pci_dev
                info->magic = MGSL_MAGIC;
                INIT_WORK(&info->task, bh_handler);
                info->max_frame_size = 4096;
-               info->raw_rx_size = DMABUFSIZE;
+               info->rbuf_fill_level = DMABUFSIZE;
                info->port.close_delay = 5*HZ/10;
                info->port.closing_wait = 30*HZ;
                init_waitqueue_head(&info->status_event_wait_q);
@@ -4134,7 +4151,7 @@ static void sync_mode(struct slgt_info *info)
         * 01      enable
         * 00      auto-CTS enable
         */
-       val = 0;
+       val = BIT2;
 
        switch(info->params.mode) {
        case MGSL_MODE_MONOSYNC: val |= BIT14 + BIT13; break;
@@ -4447,16 +4464,7 @@ static void free_rbufs(struct slgt_info *info, unsigned int i, unsigned int last
        while(!done) {
                /* reset current buffer for reuse */
                info->rbufs[i].status = 0;
-               switch(info->params.mode) {
-               case MGSL_MODE_RAW:
-               case MGSL_MODE_MONOSYNC:
-               case MGSL_MODE_BISYNC:
-                       set_desc_count(info->rbufs[i], info->raw_rx_size);
-                       break;
-               default:
-                       set_desc_count(info->rbufs[i], DMABUFSIZE);
-               }
-
+               set_desc_count(info->rbufs[i], info->rbuf_fill_level);
                if (i == last)
                        done = 1;
                if (++i == info->rbuf_count)
@@ -4563,7 +4571,7 @@ check_again:
 
        DBGBH(("%s rx frame status=%04X size=%d\n",
                info->device_name, status, framesize));
-       DBGDATA(info, info->rbufs[start].buf, min_t(int, framesize, DMABUFSIZE), "rx");
+       DBGDATA(info, info->rbufs[start].buf, min_t(int, framesize, info->rbuf_fill_level), "rx");
 
        if (framesize) {
                if (!(info->params.crc_type & HDLC_CRC_RETURN_EX)) {
@@ -4583,7 +4591,7 @@ check_again:
                        info->icount.rxok++;
 
                        while(copy_count) {
-                               int partial_count = min(copy_count, DMABUFSIZE);
+                               int partial_count = min_t(int, copy_count, info->rbuf_fill_level);
                                memcpy(p, info->rbufs[i].buf, partial_count);
                                p += partial_count;
                                copy_count -= partial_count;