[IRDA]: nsc-ircc: ISAPnP support

This enables PnP support for the nsc-ircc chipset.
Since we can't fetch the chipset cfg_base from the PnP layer, we just use
the PnP information as one more hint when probing the chip.

Signed-off-by: Jean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: Samuel Ortiz <samuel.ortiz@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 151 insertions, 34 deletions

diff --git a/drivers/net/irda/nsc-ircc.c b/drivers/net/irda/nsc-ircc.c
index ee717d0e939e..282414ba22f0 100644
--- a/drivers/net/irda/nsc-ircc.c
+++ b/drivers/net/irda/nsc-ircc.c
@@ -12,6 +12,7 @@
  *     Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>
  *     Copyright (c) 1998 Lichen Wang, <lwang@actisys.com>
  *     Copyright (c) 1998 Actisys Corp., www.actisys.com
+ *     Copyright (c) 2000-2004 Jean Tourrilhes <jt@hpl.hp.com>
  *     All Rights Reserved
  *      
  *     This program is free software; you can redistribute it and/or 
@@ -53,6 +54,7 @@
 #include <linux/init.h>
 #include <linux/rtnetlink.h>
 #include <linux/dma-mapping.h>
+#include <linux/pnp.h>
 
 #include <asm/io.h>
 #include <asm/dma.h>
@@ -78,8 +80,8 @@ static int dongle_id;
 
 /* Use BIOS settions by default, but user may supply module parameters */
 static unsigned int io[]  = { ~0, ~0, ~0, ~0 };
-static unsigned int irq[] = { 0, 0, 0, 0, 0 };
-static unsigned int dma[] = { 0, 0, 0, 0, 0 };
+static unsigned int irq[] = {  0,  0,  0,  0 };
+static unsigned int dma[] = {  0,  0,  0,  0 };
 
 static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info);
 static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info);
@@ -87,6 +89,7 @@ static int nsc_ircc_probe_39x(nsc_chip_t *chip, chipio_t *info);
 static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info);
 static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info);
 static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info);
+static int nsc_ircc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id);
 
 /* These are the known NSC chips */
 static nsc_chip_t chips[] = {
@@ -104,7 +107,6 @@ static nsc_chip_t chips[] = {
         { NULL }
 };
 
-/* Max 4 instances for now */
 static struct nsc_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
 
 static char *dongle_types[] = {
@@ -126,8 +128,24 @@ static char *dongle_types[] = {
         "No dongle connected",
 };
 
+/* PNP probing */
+static chipio_t pnp_info;
+static const struct pnp_device_id nsc_ircc_pnp_table[] = {
+        { .id = "NSC6001", .driver_data = 0 },
+        { .id = "IBM0071", .driver_data = 0 },
+        { }
+};
+
+MODULE_DEVICE_TABLE(pnp, nsc_ircc_pnp_table);
+
+static struct pnp_driver nsc_ircc_pnp_driver = {
+        .name = "nsc-ircc",
+        .id_table = nsc_ircc_pnp_table,
+        .probe = nsc_ircc_pnp_probe,
+};
+
 /* Some prototypes */
-static int  nsc_ircc_open(int i, chipio_t *info);
+static int  nsc_ircc_open(chipio_t *info);
 static int  nsc_ircc_close(struct nsc_ircc_cb *self);
 static int  nsc_ircc_setup(chipio_t *info);
 static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self);
@@ -148,6 +166,10 @@ static int  nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd
 static struct net_device_stats *nsc_ircc_net_get_stats(struct net_device *dev);
 static int nsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data);
 
+/* Globals */
+static int pnp_registered;
+static int pnp_succeeded;
+
 /*
  * Function nsc_ircc_init ()
  *
@@ -158,28 +180,30 @@ static int __init nsc_ircc_init(void)
 {
         chipio_t info;
         nsc_chip_t *chip;
-        int ret = -ENODEV;
+        int ret;
         int cfg_base;
         int cfg, id;
         int reg;
         int i = 0;
 
+        /* Register with PnP subsystem to detect disable ports */
+        ret = pnp_register_driver(&nsc_ircc_pnp_driver);
+
+        if (ret >= 0)
+                pnp_registered = 1;
+
+        ret = -ENODEV;
+
         /* Probe for all the NSC chipsets we know about */
-        for (chip=chips; chip->name ; chip++) {
+        for (chip = chips; chip->name ; chip++) {
                 IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __FUNCTION__,
                            chip->name);
                 
                 /* Try all config registers for this chip */
-                for (cfg=0; cfg<3; cfg++) {
+                for (cfg = 0; cfg < ARRAY_SIZE(chip->cfg); cfg++) {
                         cfg_base = chip->cfg[cfg];
                         if (!cfg_base)
                                 continue;
-                        
-                        memset(&info, 0, sizeof(chipio_t));
-                        info.cfg_base = cfg_base;
-                        info.fir_base = io[i];
-                        info.dma = dma[i];
-                        info.irq = irq[i];
 
                         /* Read index register */
                         reg = inb(cfg_base);
@@ -194,24 +218,64 @@ static int __init nsc_ircc_init(void)
                         if ((id & chip->cid_mask) == chip->cid_value) {
                                 IRDA_DEBUG(2, "%s() Found %s chip, revision=%d\n",
                                            __FUNCTION__, chip->name, id & ~chip->cid_mask);
-                                /* 
-                                 * If the user supplies the base address, then
-                                 * we init the chip, if not we probe the values
-                                 * set by the BIOS
-                                 */                             
-                                if (io[i] < 0x2000) {
-                                        chip->init(chip, &info);
-                                } else
-                                        chip->probe(chip, &info);
 
-                                if (nsc_ircc_open(i, &info) == 0)
-                                        ret = 0;
+                                /*
+                                 * If we found a correct PnP setting,
+                                 * we first try it.
+                                 */
+                                if (pnp_succeeded) {
+                                        memset(&info, 0, sizeof(chipio_t));
+                                        info.cfg_base = cfg_base;
+                                        info.fir_base = pnp_info.fir_base;
+                                        info.dma = pnp_info.dma;
+                                        info.irq = pnp_info.irq;
+
+                                        if (info.fir_base < 0x2000) {
+                                                IRDA_MESSAGE("%s, chip->init\n", driver_name);
+                                                chip->init(chip, &info);
+                                        } else
+                                                chip->probe(chip, &info);
+
+                                        if (nsc_ircc_open(&info) >= 0)
+                                                ret = 0;
+                                }
+
+                                /*
+                                 * Opening based on PnP values failed.
+                                 * Let's fallback to user values, or probe
+                                 * the chip.
+                                 */
+                                if (ret) {
+                                        IRDA_DEBUG(2, "%s, PnP init failed\n", driver_name);
+                                        memset(&info, 0, sizeof(chipio_t));
+                                        info.cfg_base = cfg_base;
+                                        info.fir_base = io[i];
+                                        info.dma = dma[i];
+                                        info.irq = irq[i];
+
+                                        /*
+                                         * If the user supplies the base address, then
+                                         * we init the chip, if not we probe the values
+                                         * set by the BIOS
+                                         */
+                                        if (io[i] < 0x2000) {
+                                                chip->init(chip, &info);
+                                        } else
+                                                chip->probe(chip, &info);
+
+                                        if (nsc_ircc_open(&info) >= 0)
+                                                ret = 0;
+                                }
                                 i++;
                         } else {
                                 IRDA_DEBUG(2, "%s(), Wrong chip id=0x%02x\n", __FUNCTION__, id);
                         }
                 } 
-                
+        }
+
+        if (ret) {
+                pnp_unregister_driver(&nsc_ircc_pnp_driver);
+                pnp_registered = 0;
         }
 
         return ret;
@@ -229,10 +293,15 @@ static void __exit nsc_ircc_cleanup(void)
 
         pm_unregister_all(nsc_ircc_pmproc);
 
-        for (i=0; i < 4; i++) {
+        for (i = 0; i < ARRAY_SIZE(dev_self); i++) {
                 if (dev_self[i])
                         nsc_ircc_close(dev_self[i]);
         }
+
+        if (pnp_registered)
+                pnp_unregister_driver(&nsc_ircc_pnp_driver);
+
+        pnp_registered = 0;
 }
 
 /*
@@ -241,16 +310,27 @@ static void __exit nsc_ircc_cleanup(void)
  *    Open driver instance
  *
  */
-static int __init nsc_ircc_open(int i, chipio_t *info)
+static int __init nsc_ircc_open(chipio_t *info)
 {
         struct net_device *dev;
         struct nsc_ircc_cb *self;
-        struct pm_dev *pmdev;
+        struct pm_dev *pmdev;
         void *ret;
-        int err;
+        int err, chip_index;
 
         IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
 
+
+        for (chip_index = 0; chip_index < ARRAY_SIZE(dev_self); chip_index++) {
+                if (!dev_self[chip_index])
+                        break;
+        }
+
+        if (chip_index == ARRAY_SIZE(dev_self)) {
+                IRDA_ERROR("%s(), maximum number of supported chips reached!\n", __FUNCTION__);
+                return -ENOMEM;
+        }
+
         IRDA_MESSAGE("%s, Found chip at base=0x%03x\n", driver_name,
                      info->cfg_base);
 
@@ -271,8 +351,8 @@ static int __init nsc_ircc_open(int i, chipio_t *info)
         spin_lock_init(&self->lock);
    
         /* Need to store self somewhere */
-        dev_self[i] = self;
-        self->index = i;
+        dev_self[chip_index] = self;
+        self->index = chip_index;
 
         /* Initialize IO */
         self->io.cfg_base  = info->cfg_base;
@@ -351,7 +431,7 @@ static int __init nsc_ircc_open(int i, chipio_t *info)
 
         /* Check if user has supplied a valid dongle id or not */
         if ((dongle_id <= 0) ||
-            (dongle_id >= (sizeof(dongle_types) / sizeof(dongle_types[0]))) ) {
+            (dongle_id >= ARRAY_SIZE(dongle_types))) {
                 dongle_id = nsc_ircc_read_dongle_id(self->io.fir_base);
                 
                 IRDA_MESSAGE("%s, Found dongle: %s\n", driver_name,
@@ -368,7 +448,7 @@ static int __init nsc_ircc_open(int i, chipio_t *info)
         if (pmdev)
                 pmdev->data = self;
 
-        return 0;
+        return chip_index;
  out4:
         dma_free_coherent(NULL, self->tx_buff.truesize,
                           self->tx_buff.head, self->tx_buff_dma);
@@ -379,7 +459,7 @@ static int __init nsc_ircc_open(int i, chipio_t *info)
         release_region(self->io.fir_base, self->io.fir_ext);
  out1:
         free_netdev(dev);
-        dev_self[i] = NULL;
+        dev_self[chip_index] = NULL;
         return err;
 }
 
@@ -806,6 +886,43 @@ static int nsc_ircc_probe_39x(nsc_chip_t *chip, chipio_t *info)
         return 0;
 }
 
+/* PNP probing */
+static int nsc_ircc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id)
+{
+        memset(&pnp_info, 0, sizeof(chipio_t));
+        pnp_info.irq = -1;
+        pnp_info.dma = -1;
+        pnp_succeeded = 1;
+
+        /* There don't seem to be any way to get the cfg_base.
+         * On my box, cfg_base is in the PnP descriptor of the
+         * motherboard. Oh well... Jean II */
+
+        if (pnp_port_valid(dev, 0) &&
+                !(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED))
+                pnp_info.fir_base = pnp_port_start(dev, 0);
+
+        if (pnp_irq_valid(dev, 0) &&
+                !(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED))
+                pnp_info.irq = pnp_irq(dev, 0);
+
+        if (pnp_dma_valid(dev, 0) &&
+                !(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED))
+                pnp_info.dma = pnp_dma(dev, 0);
+
+        IRDA_DEBUG(0, "%s() : From PnP, found firbase 0x%03X ; irq %d ; dma %d.\n",
+                   __FUNCTION__, pnp_info.fir_base, pnp_info.irq, pnp_info.dma);
+
+        if((pnp_info.fir_base == 0) ||
+           (pnp_info.irq == -1) || (pnp_info.dma == -1)) {
+                /* Returning an error will disable the device. Yuck ! */
+                //return -EINVAL;
+                pnp_succeeded = 0;
+        }
+
+        return 0;
+}
+
 /*
  * Function nsc_ircc_setup (info)
  *