[PATCH] yenta: make ToPIC95 bridges work with 16bit cards

ToPIC95 brides (and maybe some other too) require to use the ExCA registers
to power up the socket if a 16bit card is pluged.  allow socket drivers to
set a flag so that yenta does just that.  also clean up yenta_get_status()
a bit to use the new yenta_get_power() function.

Side note: ToPIC97 bridges (at least in Rev.5 i have) don't require this.

Ryan Underwood <nemesis-lists@icequake.net> said:

 According to the mail that David Hinds received from a Toshiba engineer,
 ToPIC95 and 97 do require this, and ToPIC100 does not.  Maybe you have a
 later revision.

 For all chips, 16-bit cards can be enabled through ExCA.  So doesn't it
 make sense just to make this the default behavior for all Toshiba chips,
 to avoid corner cases showing up later?

Daniel responded:

 I disagree with ryan to change anything for topic97 bridges.  they work.
 and I couldn't find (read google) any report of a topic97 breaking on
 applying power with the CB registers.

 I'm having several toshba notebooks at work (and home) with topic95,97,100
 bridges.  Only the ones with a topic95 didn't work.

Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 97 insertions, 28 deletions

diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c
index 62fd705203fb..0347a29f297b 100644
--- a/drivers/pcmcia/yenta_socket.c
+++ b/drivers/pcmcia/yenta_socket.c
@@ -184,22 +184,52 @@ static int yenta_get_status(struct pcmcia_socket *sock, unsigned int *value)
         return 0;
 }
 
-static int yenta_Vcc_power(u32 control)
+static void yenta_get_power(struct yenta_socket *socket, socket_state_t *state)
 {
-        switch (control & CB_SC_VCC_MASK) {
-        case CB_SC_VCC_5V: return 50;
-        case CB_SC_VCC_3V: return 33;
-        default: return 0;
-        }
-}
+        if (!(cb_readl(socket, CB_SOCKET_STATE) & CB_CBCARD) &&
+            (socket->flags & YENTA_16BIT_POWER_EXCA)) {
+                u8 reg, vcc, vpp;
+
+                reg = exca_readb(socket, I365_POWER);
+                vcc = reg & I365_VCC_MASK;
+                vpp = reg & I365_VPP1_MASK;
+                state->Vcc = state->Vpp = 0;
+
+                if (socket->flags & YENTA_16BIT_POWER_DF) {
+                        if (vcc == I365_VCC_3V)
+                                state->Vcc = 33;
+                        if (vcc == I365_VCC_5V)
+                                state->Vcc = 50;
+                        if (vpp == I365_VPP1_5V)
+                                state->Vpp = state->Vcc;
+                        if (vpp == I365_VPP1_12V)
+                                state->Vpp = 120;
+                } else {
+                        if (reg & I365_VCC_5V) {
+                                state->Vcc = 50;
+                                if (vpp == I365_VPP1_5V)
+                                        state->Vpp = 50;
+                                if (vpp == I365_VPP1_12V)
+                                        state->Vpp = 120;
+                        }
+                }
+        } else {
+                u32 control;
 
-static int yenta_Vpp_power(u32 control)
-{
-        switch (control & CB_SC_VPP_MASK) {
-        case CB_SC_VPP_12V: return 120;
-        case CB_SC_VPP_5V: return 50;
-        case CB_SC_VPP_3V: return 33;
-        default: return 0;
+                control = cb_readl(socket, CB_SOCKET_CONTROL);
+
+                switch (control & CB_SC_VCC_MASK) {
+                case CB_SC_VCC_5V: state->Vcc = 50; break;
+                case CB_SC_VCC_3V: state->Vcc = 33; break;
+                default: state->Vcc = 0;
+                }
+
+                switch (control & CB_SC_VPP_MASK) {
+                case CB_SC_VPP_12V: state->Vpp = 120; break;
+                case CB_SC_VPP_5V: state->Vpp = 50; break;
+                case CB_SC_VPP_3V: state->Vpp = 33; break;
+                default: state->Vpp = 0;
+                }
         }
 }
 
@@ -211,8 +241,7 @@ static int yenta_get_socket(struct pcmcia_socket *sock, socket_state_t *state)
 
         control = cb_readl(socket, CB_SOCKET_CONTROL);
 
-        state->Vcc = yenta_Vcc_power(control);
-        state->Vpp = yenta_Vpp_power(control);
+        yenta_get_power(socket, state);
         state->io_irq = socket->io_irq;
 
         if (cb_readl(socket, CB_SOCKET_STATE) & CB_CBCARD) {
@@ -246,19 +275,54 @@ static int yenta_get_socket(struct pcmcia_socket *sock, socket_state_t *state)
 
 static void yenta_set_power(struct yenta_socket *socket, socket_state_t *state)
 {
-        u32 reg = 0;    /* CB_SC_STPCLK? */
-        switch (state->Vcc) {
-        case 33: reg = CB_SC_VCC_3V; break;
-        case 50: reg = CB_SC_VCC_5V; break;
-        default: reg = 0; break;
-        }
-        switch (state->Vpp) {
-        case 33:  reg |= CB_SC_VPP_3V; break;
-        case 50:  reg |= CB_SC_VPP_5V; break;
-        case 120: reg |= CB_SC_VPP_12V; break;
+        /* some birdges require to use the ExCA registers to power 16bit cards */
+        if (!(cb_readl(socket, CB_SOCKET_STATE) & CB_CBCARD) &&
+            (socket->flags & YENTA_16BIT_POWER_EXCA)) {
+                u8 reg, old;
+                reg = old = exca_readb(socket, I365_POWER);
+                reg &= ~(I365_VCC_MASK | I365_VPP1_MASK | I365_VPP2_MASK);
+
+                /* i82365SL-DF style */
+                if (socket->flags & YENTA_16BIT_POWER_DF) {
+                        switch (state->Vcc) {
+                        case 33: reg |= I365_VCC_3V; break;
+                        case 50: reg |= I365_VCC_5V; break;
+                        default: reg = 0; break;
+                        }
+                        switch (state->Vpp) {
+                        case 33:
+                        case 50: reg |= I365_VPP1_5V; break;
+                        case 120: reg |= I365_VPP1_12V; break;
+                        }
+                } else {
+                        /* i82365SL-B style */
+                        switch (state->Vcc) {
+                        case 50: reg |= I365_VCC_5V; break;
+                        default: reg = 0; break;
+                        }
+                        switch (state->Vpp) {
+                        case 50: reg |= I365_VPP1_5V | I365_VPP2_5V; break;
+                        case 120: reg |= I365_VPP1_12V | I365_VPP2_12V; break;
+                        }
+                }
+
+                if (reg != old)
+                        exca_writeb(socket, I365_POWER, reg);
+        } else {
+                u32 reg = 0;    /* CB_SC_STPCLK? */
+                switch (state->Vcc) {
+                case 33: reg = CB_SC_VCC_3V; break;
+                case 50: reg = CB_SC_VCC_5V; break;
+                default: reg = 0; break;
+                }
+                switch (state->Vpp) {
+                case 33:  reg |= CB_SC_VPP_3V; break;
+                case 50:  reg |= CB_SC_VPP_5V; break;
+                case 120: reg |= CB_SC_VPP_12V; break;
+                }
+                if (reg != cb_readl(socket, CB_SOCKET_CONTROL))
+                        cb_writel(socket, CB_SOCKET_CONTROL, reg);
         }
-        if (reg != cb_readl(socket, CB_SOCKET_CONTROL))
-                cb_writel(socket, CB_SOCKET_CONTROL, reg);
 }
 
 static int yenta_set_socket(struct pcmcia_socket *sock, socket_state_t *state)
@@ -751,6 +815,7 @@ enum {
         CARDBUS_TYPE_TI12XX,
         CARDBUS_TYPE_TI1250,
         CARDBUS_TYPE_RICOH,
+        CARDBUS_TYPE_TOPIC95,
         CARDBUS_TYPE_TOPIC97,
         CARDBUS_TYPE_O2MICRO,
 };
@@ -789,6 +854,9 @@ static struct cardbus_type cardbus_type[] = {
                 .save_state     = ricoh_save_state,
                 .restore_state  = ricoh_restore_state,
         },
+        [CARDBUS_TYPE_TOPIC95]  = {
+                .override       = topic95_override,
+        },
         [CARDBUS_TYPE_TOPIC97]  = {
                 .override       = topic97_override,
         },
@@ -1196,6 +1264,7 @@ static struct pci_device_id yenta_table [] = {
         CB_ID(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C476, RICOH),
         CB_ID(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_RL5C478, RICOH),
 
+        CB_ID(PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_TOSHIBA_TOPIC95, TOPIC95),
         CB_ID(PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_TOSHIBA_TOPIC97, TOPIC97),
         CB_ID(PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_TOSHIBA_TOPIC100, TOPIC97),