MIPS: Alchemy: Basic support for the DB1300 board.

Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2867/
Patchwork: https://patchwork.linux-mips.org/patch/2919/
Patchwork: https://patchwork.linux-mips.org/patch/2928/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 24 insertions, 6 deletions

diff --git a/drivers/pcmcia/Kconfig b/drivers/pcmcia/Kconfig
index c022b5cedcf9..f9e3fb3a285b 100644
--- a/drivers/pcmcia/Kconfig
+++ b/drivers/pcmcia/Kconfig
@@ -161,8 +161,8 @@ config PCMCIA_ALCHEMY_DEVBOARD
         select 64BIT_PHYS_ADDR
         help
           Enable this driver of you want PCMCIA support on your Alchemy
-          Db1000, Db/Pb1100, Db/Pb1500, Db/Pb1550, Db/Pb1200 board.
-          NOT suitable for the PB1000!
+          Db1000, Db/Pb1100, Db/Pb1500, Db/Pb1550, Db/Pb1200, DB1300
+          board.  NOT suitable for the PB1000!
 
           This driver is also available as a module called db1xxx_ss.ko
 
diff --git a/drivers/pcmcia/db1xxx_ss.c b/drivers/pcmcia/db1xxx_ss.c
index 3e49df6d5e3b..5b7c22784aff 100644
--- a/drivers/pcmcia/db1xxx_ss.c
+++ b/drivers/pcmcia/db1xxx_ss.c
@@ -7,7 +7,7 @@
 
 /* This is a fairly generic PCMCIA socket driver suitable for the
  * following Alchemy Development boards:
- *  Db1000, Db/Pb1500, Db/Pb1100, Db/Pb1550, Db/Pb1200.
+ *  Db1000, Db/Pb1500, Db/Pb1100, Db/Pb1550, Db/Pb1200, Db1300
  *
  * The Db1000 is used as a reference:  Per-socket card-, carddetect- and
  *  statuschange IRQs connected to SoC GPIOs, control and status register
@@ -18,6 +18,7 @@
  *      - Pb1100/Pb1500:  single socket only; voltage key bits VS are
  *                        at STATUS[5:4] (instead of STATUS[1:0]).
  *      - Au1200-based:   additional card-eject irqs, irqs not gpios!
+ *      - Db1300:         Db1200-like, no pwr ctrl, single socket (#1).
  */
 
 #include <linux/delay.h>
@@ -59,11 +60,17 @@ struct db1x_pcmcia_sock {
 #define BOARD_TYPE_DEFAULT      0       /* most boards */
 #define BOARD_TYPE_DB1200       1       /* IRQs aren't gpios */
 #define BOARD_TYPE_PB1100       2       /* VS bits slightly different */
+#define BOARD_TYPE_DB1300       3       /* no power control */
         int     board_type;
 };
 
 #define to_db1x_socket(x) container_of(x, struct db1x_pcmcia_sock, socket)
 
+static int db1300_card_inserted(struct db1x_pcmcia_sock *sock)
+{
+        return bcsr_read(BCSR_SIGSTAT) & (1 << 8);
+}
+
 /* DB/PB1200: check CPLD SIGSTATUS register bit 10/12 */
 static int db1200_card_inserted(struct db1x_pcmcia_sock *sock)
 {
@@ -84,6 +91,8 @@ static int db1x_card_inserted(struct db1x_pcmcia_sock *sock)
         switch (sock->board_type) {
         case BOARD_TYPE_DB1200:
                 return db1200_card_inserted(sock);
+        case BOARD_TYPE_DB1300:
+                return db1300_card_inserted(sock);
         default:
                 return db1000_card_inserted(sock);
         }
@@ -160,7 +169,8 @@ static int db1x_pcmcia_setup_irqs(struct db1x_pcmcia_sock *sock)
          * ejection handler have been registered and the currently
          * active one disabled.
          */
-        if (sock->board_type == BOARD_TYPE_DB1200) {
+        if ((sock->board_type == BOARD_TYPE_DB1200) ||
+            (sock->board_type == BOARD_TYPE_DB1300)) {
                 ret = request_irq(sock->insert_irq, db1200_pcmcia_cdirq,
                                   IRQF_DISABLED, "pcmcia_insert", sock);
                 if (ret)
@@ -174,7 +184,7 @@ static int db1x_pcmcia_setup_irqs(struct db1x_pcmcia_sock *sock)
                 }
 
                 /* enable the currently silent one */
-                if (db1200_card_inserted(sock))
+                if (db1x_card_inserted(sock))
                         enable_irq(sock->eject_irq);
                 else
                         enable_irq(sock->insert_irq);
@@ -270,7 +280,8 @@ static int db1x_pcmcia_configure(struct pcmcia_socket *skt,
         }
 
         /* create new voltage code */
-        cr_set |= ((v << 2) | p) << (sock->nr * 8);
+        if (sock->board_type != BOARD_TYPE_DB1300)
+                cr_set |= ((v << 2) | p) << (sock->nr * 8);
 
         changed = state->flags ^ sock->old_flags;
 
@@ -343,6 +354,10 @@ static int db1x_pcmcia_get_status(struct pcmcia_socket *skt,
         /* if Vcc is not zero, we have applied power to a card */
         status |= GET_VCC(cr, sock->nr) ? SS_POWERON : 0;
 
+        /* DB1300: power always on, but don't tell when no card present */
+        if ((sock->board_type == BOARD_TYPE_DB1300) && (status & SS_DETECT))
+                status = SS_POWERON | SS_3VCARD | SS_DETECT;
+
         /* reset de-asserted? then we're ready */
         status |= (GET_RESET(cr, sock->nr)) ? SS_READY : SS_RESET;
 
@@ -419,6 +434,9 @@ static int __devinit db1x_pcmcia_socket_probe(struct platform_device *pdev)
         case BCSR_WHOAMI_PB1200 ... BCSR_WHOAMI_DB1200:
                 sock->board_type = BOARD_TYPE_DB1200;
                 break;
+        case BCSR_WHOAMI_DB1300:
+                sock->board_type = BOARD_TYPE_DB1300;
+                break;
         default:
                 printk(KERN_INFO "db1xxx-ss: unknown board %d!\n", bid);
                 ret = -ENODEV;