[PATCH] yenta: auto-tune EnE bridges for CardBus cards

Echo Audio cardbus products are known to be incompatible with EnE bridges.
in order to maybe solve the problem a EnE specific test bit has to be set,
another cleared...but other setups have a good chance to break when just
forcing the bits.  so do the whole thingy automatically.

The patch adds a hook in cb_alloc() that allows special tuning for the
different chipsets.  for ene just match the Echo products and set/clear the
test bits, defaults to do the same thing as w/o the patch to not break
working setups.

Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Cc: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

diff --git a/drivers/pcmcia/cardbus.c b/drivers/pcmcia/cardbus.c
index 1d755e2..3f6d51d 100644 (file)
--- a/drivers/pcmcia/cardbus.c
+++ b/drivers/pcmcia/cardbus.c
@@ -228,6 +228,11 @@ int cb_alloc(struct pcmcia_socket * s)
        pci_bus_size_bridges(bus);
        pci_bus_assign_resources(bus);
        cardbus_assign_irqs(bus, s->pci_irq);
+
+       /* socket specific tune function */
+       if (s->tune_bridge)
+               s->tune_bridge(s, bus);
+
        pci_enable_bridges(bus);
        pci_bus_add_devices(bus);
 

diff --git a/drivers/pcmcia/ti113x.h b/drivers/pcmcia/ti113x.h
index fbe233e..d319f2e 100644 (file)
--- a/drivers/pcmcia/ti113x.h
+++ b/drivers/pcmcia/ti113x.h
@@ -153,6 +153,12 @@
 /* EnE test register */
 #define ENE_TEST_C9                    0xc9    /* 8bit */
 #define ENE_TEST_C9_TLTENABLE          0x02
+#define ENE_TEST_C9_PFENABLE_F0                0x04
+#define ENE_TEST_C9_PFENABLE_F1                0x08
+#define ENE_TEST_C9_PFENABLE           (ENE_TEST_C9_PFENABLE_F0 | ENE_TEST_C9_PFENABLE_F0)
+#define ENE_TEST_C9_WPDISALBLE_F0      0x40
+#define ENE_TEST_C9_WPDISALBLE_F1      0x80
+#define ENE_TEST_C9_WPDISALBLE         (ENE_TEST_C9_WPDISALBLE_F0 | ENE_TEST_C9_WPDISALBLE_F1)
 
 /*
  * Texas Instruments CardBus controller overrides.
@@ -790,16 +796,6 @@ static int ti12xx_override(struct yenta_socket *socket)
        if (val_orig != val)
                config_writel(socket, TI113X_SYSTEM_CONTROL, val);
 
-       /*
-        * for EnE bridges only: clear testbit TLTEnable. this makes the
-        * RME Hammerfall DSP sound card working.
-        */
-       if (socket->dev->vendor == PCI_VENDOR_ID_ENE) {
-               u8 test_c9 = config_readb(socket, ENE_TEST_C9);
-               test_c9 &= ~ENE_TEST_C9_TLTENABLE;
-               config_writeb(socket, ENE_TEST_C9, test_c9);
-       }
-
        /*
         * Yenta expects controllers to use CSCINT to route
         * CSC interrupts to PCI rather than INTVAL.
@@ -841,5 +837,75 @@ static int ti1250_override(struct yenta_socket *socket)
        return ti12xx_override(socket);
 }
 
+
+/**
+ * EnE specific part. EnE bridges are register compatible with TI bridges but
+ * have their own test registers and more important their own little problems.
+ * Some fixup code to make everybody happy (TM).
+ */
+
+/**
+ * set/clear various test bits:
+ * Defaults to clear the bit.
+ * - mask (u8) defines what bits to change
+ * - bits (u8) is the values to change them to
+ * -> it's
+ *     current = (current & ~mask) | bits
+ */
+/* pci ids of devices that wants to have the bit set */
+#define DEVID(_vend,_dev,_subvend,_subdev,mask,bits) {         \
+               .vendor         = _vend,                        \
+               .device         = _dev,                         \
+               .subvendor      = _subvend,                     \
+               .subdevice      = _subdev,                      \
+               .driver_data    = ((mask) << 8 | (bits)),       \
+       }
+static struct pci_device_id ene_tune_tbl[] = {
+       /* Echo Audio products based on motorola DSP56301 and DSP56361 */
+       DEVID(PCI_VENDOR_ID_MOTOROLA, 0x1801, 0xECC0, PCI_ANY_ID,
+               ENE_TEST_C9_TLTENABLE | ENE_TEST_C9_PFENABLE, ENE_TEST_C9_TLTENABLE),
+       DEVID(PCI_VENDOR_ID_MOTOROLA, 0x3410, 0xECC0, PCI_ANY_ID,
+               ENE_TEST_C9_TLTENABLE | ENE_TEST_C9_PFENABLE, ENE_TEST_C9_TLTENABLE),
+
+       {}
+};
+
+static void ene_tune_bridge(struct pcmcia_socket *sock, struct pci_bus *bus)
+{
+       struct yenta_socket *socket = container_of(sock, struct yenta_socket, socket);
+       struct pci_dev *dev;
+       struct pci_device_id *id = NULL;
+       u8 test_c9, old_c9, mask, bits;
+
+       list_for_each_entry(dev, &bus->devices, bus_list) {
+               id = (struct pci_device_id *) pci_match_id(ene_tune_tbl, dev);
+               if (id)
+                       break;
+       }
+
+       test_c9 = old_c9 = config_readb(socket, ENE_TEST_C9);
+       if (id) {
+               mask = (id->driver_data >> 8) & 0xFF;
+               bits = id->driver_data & 0xFF;
+
+               test_c9 = (test_c9 & ~mask) | bits;
+       }
+       else
+               /* default to clear TLTEnable bit, old behaviour */
+               test_c9 &= ~ENE_TEST_C9_TLTENABLE;
+
+       printk(KERN_INFO "yenta EnE: chaning testregister 0xC9, %02x -> %02x\n", old_c9, test_c9);
+       config_writeb(socket, ENE_TEST_C9, test_c9);
+}
+
+
+static int ene_override(struct yenta_socket *socket)
+{
+       /* install tune_bridge() function */
+       socket->socket.tune_bridge = ene_tune_bridge;
+
+       return ti1250_override(socket);
+}
+
 #endif /* _LINUX_TI113X_H */
 

diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c
index ba4d78e..fd2a6f8 100644 (file)
--- a/drivers/pcmcia/yenta_socket.c
+++ b/drivers/pcmcia/yenta_socket.c
@@ -819,6 +819,7 @@ enum {
        CARDBUS_TYPE_TOPIC95,
        CARDBUS_TYPE_TOPIC97,
        CARDBUS_TYPE_O2MICRO,
+       CARDBUS_TYPE_ENE,
 };
 
 /*
@@ -865,6 +866,12 @@ static struct cardbus_type cardbus_type[] = {
                .override       = o2micro_override,
                .restore_state  = o2micro_restore_state,
        },
+       [CARDBUS_TYPE_ENE]      = {
+               .override       = ene_override,
+               .save_state     = ti_save_state,
+               .restore_state  = ti_restore_state,
+               .sock_init      = ti_init,
+       },
 };
 
 
@@ -1265,10 +1272,10 @@ static struct pci_device_id yenta_table [] = {
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1250, TI1250),
        CB_ID(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1410, TI1250),
 
-       CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1211, TI12XX),
-       CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1225, TI12XX),
-       CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1410, TI1250),
-       CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1420, TI12XX),
+       CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1211, ENE),
+       CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1225, ENE),
+       CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1410, ENE),
+       CB_ID(PCI_VENDOR_ID_ENE, PCI_DEVICE_ID_ENE_1420, ENE),
 
        CB_ID(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C465, RICOH),
        CB_ID(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C466, RICOH),

diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index b86a4b7..92efb2c 100644 (file)
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -2187,7 +2187,12 @@
 #define PCI_DEVICE_ID_ENE_1211         0x1211
 #define PCI_DEVICE_ID_ENE_1225         0x1225
 #define PCI_DEVICE_ID_ENE_1410         0x1410
+#define PCI_DEVICE_ID_ENE_710          0x1411
+#define PCI_DEVICE_ID_ENE_712          0x1412
 #define PCI_DEVICE_ID_ENE_1420         0x1420
+#define PCI_DEVICE_ID_ENE_720          0x1421
+#define PCI_DEVICE_ID_ENE_722          0x1422
+
 #define PCI_VENDOR_ID_CHELSIO          0x1425
 
 #define PCI_VENDOR_ID_MIPS             0x153f

diff --git a/include/pcmcia/ss.h b/include/pcmcia/ss.h
index 0f7aacc..c8592c7 100644 (file)
--- a/include/pcmcia/ss.h
+++ b/include/pcmcia/ss.h
@@ -21,6 +21,9 @@
 #include <pcmcia/cs_types.h>
 #include <pcmcia/cs.h>
 #include <pcmcia/bulkmem.h>
+#ifdef CONFIG_CARDBUS
+#include <linux/pci.h>
+#endif
 
 /* Definitions for card status flags for GetStatus */
 #define SS_WRPROT      0x0001
@@ -233,7 +236,11 @@ struct pcmcia_socket {
 
        /* so is power hook */
        int (*power_hook)(struct pcmcia_socket *sock, int operation);
-                           
+#ifdef CONFIG_CARDBUS
+       /* allows tuning the CB bridge before loading driver for the CB card */
+       void (*tune_bridge)(struct pcmcia_socket *sock, struct pci_bus *bus);
+#endif
+
        /* state thread */
        struct semaphore                skt_sem;        /* protects socket h/w state */