linux/drivers/atm/uPD98402.c

266 lines
6.5 KiB
C
Raw Normal View History

/* drivers/atm/uPD98402.c - NEC uPD98402 (PHY) declarations */
/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/atmdev.h>
#include <linux/sonet.h>
#include <linux/init.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 09:04:11 +01:00
#include <linux/slab.h>
#include <asm/uaccess.h>
#include <linux/atomic.h>
#include "uPD98402.h"
#if 0
#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
#else
#define DPRINTK(format,args...)
#endif
struct uPD98402_priv {
struct k_sonet_stats sonet_stats;/* link diagnostics */
unsigned char framing; /* SONET/SDH framing */
int loop_mode; /* loopback mode */
spinlock_t lock;
};
#define PRIV(dev) ((struct uPD98402_priv *) dev->phy_data)
#define PUT(val,reg) dev->ops->phy_put(dev,val,uPD98402_##reg)
#define GET(reg) dev->ops->phy_get(dev,uPD98402_##reg)
static int fetch_stats(struct atm_dev *dev,struct sonet_stats __user *arg,int zero)
{
struct sonet_stats tmp;
int error = 0;
atomic_add(GET(HECCT),&PRIV(dev)->sonet_stats.uncorr_hcs);
sonet_copy_stats(&PRIV(dev)->sonet_stats,&tmp);
if (arg) error = copy_to_user(arg,&tmp,sizeof(tmp));
if (zero && !error) {
/* unused fields are reported as -1, but we must not "adjust"
them */
tmp.corr_hcs = tmp.tx_cells = tmp.rx_cells = 0;
sonet_subtract_stats(&PRIV(dev)->sonet_stats,&tmp);
}
return error ? -EFAULT : 0;
}
static int set_framing(struct atm_dev *dev,unsigned char framing)
{
static const unsigned char sonet[] = { 1,2,3,0 };
static const unsigned char sdh[] = { 1,0,0,2 };
const char *set;
unsigned long flags;
switch (framing) {
case SONET_FRAME_SONET:
set = sonet;
break;
case SONET_FRAME_SDH:
set = sdh;
break;
default:
return -EINVAL;
}
spin_lock_irqsave(&PRIV(dev)->lock, flags);
PUT(set[0],C11T);
PUT(set[1],C12T);
PUT(set[2],C13T);
PUT((GET(MDR) & ~uPD98402_MDR_SS_MASK) | (set[3] <<
uPD98402_MDR_SS_SHIFT),MDR);
spin_unlock_irqrestore(&PRIV(dev)->lock, flags);
return 0;
}
static int get_sense(struct atm_dev *dev,u8 __user *arg)
{
unsigned long flags;
unsigned char s[3];
spin_lock_irqsave(&PRIV(dev)->lock, flags);
s[0] = GET(C11R);
s[1] = GET(C12R);
s[2] = GET(C13R);
spin_unlock_irqrestore(&PRIV(dev)->lock, flags);
return (put_user(s[0], arg) || put_user(s[1], arg+1) ||
put_user(s[2], arg+2) || put_user(0xff, arg+3) ||
put_user(0xff, arg+4) || put_user(0xff, arg+5)) ? -EFAULT : 0;
}
static int set_loopback(struct atm_dev *dev,int mode)
{
unsigned char mode_reg;
mode_reg = GET(MDR) & ~(uPD98402_MDR_TPLP | uPD98402_MDR_ALP |
uPD98402_MDR_RPLP);
switch (__ATM_LM_XTLOC(mode)) {
case __ATM_LM_NONE:
break;
case __ATM_LM_PHY:
mode_reg |= uPD98402_MDR_TPLP;
break;
case __ATM_LM_ATM:
mode_reg |= uPD98402_MDR_ALP;
break;
default:
return -EINVAL;
}
switch (__ATM_LM_XTRMT(mode)) {
case __ATM_LM_NONE:
break;
case __ATM_LM_PHY:
mode_reg |= uPD98402_MDR_RPLP;
break;
default:
return -EINVAL;
}
PUT(mode_reg,MDR);
PRIV(dev)->loop_mode = mode;
return 0;
}
static int uPD98402_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
{
switch (cmd) {
case SONET_GETSTATZ:
case SONET_GETSTAT:
return fetch_stats(dev,arg, cmd == SONET_GETSTATZ);
case SONET_SETFRAMING:
return set_framing(dev, (int)(unsigned long)arg);
case SONET_GETFRAMING:
return put_user(PRIV(dev)->framing,(int __user *)arg) ?
-EFAULT : 0;
case SONET_GETFRSENSE:
return get_sense(dev,arg);
case ATM_SETLOOP:
return set_loopback(dev, (int)(unsigned long)arg);
case ATM_GETLOOP:
return put_user(PRIV(dev)->loop_mode,(int __user *)arg) ?
-EFAULT : 0;
case ATM_QUERYLOOP:
return put_user(ATM_LM_LOC_PHY | ATM_LM_LOC_ATM |
ATM_LM_RMT_PHY,(int __user *)arg) ? -EFAULT : 0;
default:
return -ENOIOCTLCMD;
}
}
#define ADD_LIMITED(s,v) \
{ atomic_add(GET(v),&PRIV(dev)->sonet_stats.s); \
if (atomic_read(&PRIV(dev)->sonet_stats.s) < 0) \
atomic_set(&PRIV(dev)->sonet_stats.s,INT_MAX); }
static void stat_event(struct atm_dev *dev)
{
unsigned char events;
events = GET(PCR);
if (events & uPD98402_PFM_PFEB) ADD_LIMITED(path_febe,PFECB);
if (events & uPD98402_PFM_LFEB) ADD_LIMITED(line_febe,LECCT);
if (events & uPD98402_PFM_B3E) ADD_LIMITED(path_bip,B3ECT);
if (events & uPD98402_PFM_B2E) ADD_LIMITED(line_bip,B2ECT);
if (events & uPD98402_PFM_B1E) ADD_LIMITED(section_bip,B1ECT);
}
#undef ADD_LIMITED
static void uPD98402_int(struct atm_dev *dev)
{
static unsigned long silence = 0;
unsigned char reason;
while ((reason = GET(PICR))) {
if (reason & uPD98402_INT_LOS)
printk(KERN_NOTICE "%s(itf %d): signal lost\n",
dev->type,dev->number);
if (reason & uPD98402_INT_PFM) stat_event(dev);
if (reason & uPD98402_INT_PCO) {
(void) GET(PCOCR); /* clear interrupt cause */
atomic_add(GET(HECCT),
&PRIV(dev)->sonet_stats.uncorr_hcs);
}
if ((reason & uPD98402_INT_RFO) &&
(time_after(jiffies, silence) || silence == 0)) {
printk(KERN_WARNING "%s(itf %d): uPD98402 receive "
"FIFO overflow\n",dev->type,dev->number);
silence = (jiffies+HZ/2)|1;
}
}
}
static int uPD98402_start(struct atm_dev *dev)
{
DPRINTK("phy_start\n");
if (!(dev->dev_data = kmalloc(sizeof(struct uPD98402_priv),GFP_KERNEL)))
return -ENOMEM;
spin_lock_init(&PRIV(dev)->lock);
memset(&PRIV(dev)->sonet_stats,0,sizeof(struct k_sonet_stats));
(void) GET(PCR); /* clear performance events */
PUT(uPD98402_PFM_FJ,PCMR); /* ignore frequency adj */
(void) GET(PCOCR); /* clear overflows */
PUT(~uPD98402_PCO_HECC,PCOMR);
(void) GET(PICR); /* clear interrupts */
PUT(~(uPD98402_INT_PFM | uPD98402_INT_ALM | uPD98402_INT_RFO |
uPD98402_INT_LOS),PIMR); /* enable them */
(void) fetch_stats(dev,NULL,1); /* clear kernel counters */
atomic_set(&PRIV(dev)->sonet_stats.corr_hcs,-1);
atomic_set(&PRIV(dev)->sonet_stats.tx_cells,-1);
atomic_set(&PRIV(dev)->sonet_stats.rx_cells,-1);
return 0;
}
static int uPD98402_stop(struct atm_dev *dev)
{
/* let SAR driver worry about stopping interrupts */
kfree(PRIV(dev));
return 0;
}
static const struct atmphy_ops uPD98402_ops = {
.start = uPD98402_start,
.ioctl = uPD98402_ioctl,
.interrupt = uPD98402_int,
.stop = uPD98402_stop,
};
int uPD98402_init(struct atm_dev *dev)
{
DPRINTK("phy_init\n");
dev->phy = &uPD98402_ops;
return 0;
}
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(uPD98402_init);
static __init int uPD98402_module_init(void)
{
return 0;
}
module_init(uPD98402_module_init);
/* module_exit not defined so not unloadable */