3 files changed, 1 insertions, 75 deletions

diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c
index 833e011a426f..6f594d2d334f 100644
--- a/drivers/tty/serial/8250.c
+++ b/drivers/tty/serial/8250.c
@@ -461,42 +461,6 @@ static void tsi_serial_out(struct uart_port *p, int offset, int value)
                 writeb(value, p->membase + offset);
 }
 
-/* Save the LCR value so it can be re-written when a Busy Detect IRQ occurs. */
-static inline void dwapb_save_out_value(struct uart_port *p, int offset,
-                                        int value)
-{
-        struct uart_8250_port *up =
-                container_of(p, struct uart_8250_port, port);
-
-        if (offset == UART_LCR)
-                up->lcr = value;
-}
-
-/* Read the IER to ensure any interrupt is cleared before returning from ISR. */
-static inline void dwapb_check_clear_ier(struct uart_port *p, int offset)
-{
-        if (offset == UART_TX || offset == UART_IER)
-                p->serial_in(p, UART_IER);
-}
-
-static void dwapb_serial_out(struct uart_port *p, int offset, int value)
-{
-        int save_offset = offset;
-        offset = map_8250_out_reg(p, offset) << p->regshift;
-        dwapb_save_out_value(p, save_offset, value);
-        writeb(value, p->membase + offset);
-        dwapb_check_clear_ier(p, save_offset);
-}
-
-static void dwapb32_serial_out(struct uart_port *p, int offset, int value)
-{
-        int save_offset = offset;
-        offset = map_8250_out_reg(p, offset) << p->regshift;
-        dwapb_save_out_value(p, save_offset, value);
-        writel(value, p->membase + offset);
-        dwapb_check_clear_ier(p, save_offset);
-}
-
 static unsigned int io_serial_in(struct uart_port *p, int offset)
 {
         offset = map_8250_in_reg(p, offset) << p->regshift;
@@ -542,16 +506,6 @@ static void set_io_from_upio(struct uart_port *p)
                 p->serial_out = tsi_serial_out;
                 break;
 
-        case UPIO_DWAPB:
-                p->serial_in = mem_serial_in;
-                p->serial_out = dwapb_serial_out;
-                break;
-
-        case UPIO_DWAPB32:
-                p->serial_in = mem32_serial_in;
-                p->serial_out = dwapb32_serial_out;
-                break;
-
         default:
                 p->serial_in = io_serial_in;
                 p->serial_out = io_serial_out;
@@ -570,8 +524,6 @@ serial_out_sync(struct uart_8250_port *up, int offset, int value)
         case UPIO_MEM:
         case UPIO_MEM32:
         case UPIO_AU:
-        case UPIO_DWAPB:
-        case UPIO_DWAPB32:
                 p->serial_out(p, offset, value);
                 p->serial_in(p, UART_LCR);      /* safe, no side-effects */
                 break;
@@ -1679,23 +1631,7 @@ static irqreturn_t serial8250_interrupt(int irq, void *dev_id)
                 port = &up->port;
 
                 if (port->handle_irq(port)) {
-
                         handled = 1;
-
-                        end = NULL;
-                } else if ((up->port.iotype == UPIO_DWAPB ||
-                            up->port.iotype == UPIO_DWAPB32) &&
-                          (iir & UART_IIR_BUSY) == UART_IIR_BUSY) {
-                        /* The DesignWare APB UART has an Busy Detect (0x07)
-                         * interrupt meaning an LCR write attempt occurred while the
-                         * UART was busy. The interrupt must be cleared by reading
-                         * the UART status register (USR) and the LCR re-written. */
-                        unsigned int status;
-                        status = *(volatile u32 *)up->port.private_data;
-                        serial_out(up, UART_LCR, up->lcr);
-
-                        handled = 1;
-
                         end = NULL;
                 } else if (end == NULL)
                         end = l;
@@ -2592,8 +2528,6 @@ static int serial8250_request_std_resource(struct uart_8250_port *up)
         case UPIO_TSI:
         case UPIO_MEM32:
         case UPIO_MEM:
-        case UPIO_DWAPB:
-        case UPIO_DWAPB32:
                 if (!up->port.mapbase)
                         break;
 
@@ -2630,8 +2564,6 @@ static void serial8250_release_std_resource(struct uart_8250_port *up)
         case UPIO_TSI:
         case UPIO_MEM32:
         case UPIO_MEM:
-        case UPIO_DWAPB:
-        case UPIO_DWAPB32:
                 if (!up->port.mapbase)
                         break;
 
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 44c29631b724..3844980b397f 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2032,8 +2032,6 @@ uart_report_port(struct uart_driver *drv, struct uart_port *port)
         case UPIO_MEM32:
         case UPIO_AU:
         case UPIO_TSI:
-        case UPIO_DWAPB:
-        case UPIO_DWAPB32:
                 snprintf(address, sizeof(address),
                          "MMIO 0x%llx", (unsigned long long)port->mapbase);
                 break;
@@ -2446,8 +2444,6 @@ int uart_match_port(struct uart_port *port1, struct uart_port *port2)
         case UPIO_MEM32:
         case UPIO_AU:
         case UPIO_TSI:
-        case UPIO_DWAPB:
-        case UPIO_DWAPB32:
                 return (port1->mapbase == port2->mapbase);
         }
         return 0;
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index c31ae43c073d..493773e3b46d 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -318,9 +318,7 @@ struct uart_port {
 #define UPIO_MEM32              (3)
 #define UPIO_AU                 (4)                     /* Au1x00 type IO */
 #define UPIO_TSI                (5)                     /* Tsi108/109 type IO */
-#define UPIO_DWAPB              (6)                     /* DesignWare APB UART */
-#define UPIO_RM9000             (7)                     /* RM9000 type IO */
-#define UPIO_DWAPB32            (8)                     /* DesignWare APB UART (32 bit accesses) */
+#define UPIO_RM9000             (6)                     /* RM9000 type IO */
 
         unsigned int            read_status_mask;       /* driver specific */
         unsigned int            ignore_status_mask;     /* driver specific */