The support for DBDMA was never completed. Remove the the code that only
maps spaces without real work.
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/tty/serial/pmac_zilog.c | 38 +--------------------------------
drivers/tty/serial/pmac_zilog.h | 9 --------
2 files changed, 1 insertion(+), 46 deletions(-)
diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index c903085acb8d..2953ff64a892 100644
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -65,9 +65,6 @@
#include "pmac_zilog.h"
-/* Not yet implemented */
-#undef HAS_DBDMA
-
static char version[] __initdata = "pmac_zilog: 0.6 (Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>)";
MODULE_AUTHOR("Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>");
MODULE_DESCRIPTION("Driver for the Mac and PowerMac serial ports.");
@@ -1399,7 +1396,7 @@ static int __init pmz_init_port(struct uart_pmac_port *uap)
char name[1];
} *slots;
int len;
- struct resource r_ports, r_rxdma, r_txdma;
+ struct resource r_ports;
/*
* Request & map chip registers
@@ -1411,35 +1408,6 @@ static int __init pmz_init_port(struct uart_pmac_port *uap)
uap->control_reg = uap->port.membase;
uap->data_reg = uap->control_reg + 0x10;
-
- /*
- * Request & map DBDMA registers
- */
-#ifdef HAS_DBDMA
- if (of_address_to_resource(np, 1, &r_txdma) == 0 &&
- of_address_to_resource(np, 2, &r_rxdma) == 0)
- uap->flags |= PMACZILOG_FLAG_HAS_DMA;
-#else
- memset(&r_txdma, 0, sizeof(struct resource));
- memset(&r_rxdma, 0, sizeof(struct resource));
-#endif
- if (ZS_HAS_DMA(uap)) {
- uap->tx_dma_regs = ioremap(r_txdma.start, 0x100);
- if (uap->tx_dma_regs == NULL) {
- uap->flags &= ~PMACZILOG_FLAG_HAS_DMA;
- goto no_dma;
- }
- uap->rx_dma_regs = ioremap(r_rxdma.start, 0x100);
- if (uap->rx_dma_regs == NULL) {
- iounmap(uap->tx_dma_regs);
- uap->tx_dma_regs = NULL;
- uap->flags &= ~PMACZILOG_FLAG_HAS_DMA;
- goto no_dma;
- }
- uap->tx_dma_irq = irq_of_parse_and_map(np, 1);
- uap->rx_dma_irq = irq_of_parse_and_map(np, 2);
- }
-no_dma:
/*
* Detect port type
@@ -1505,8 +1473,6 @@ static int __init pmz_init_port(struct uart_pmac_port *uap)
of_device_is_compatible(np->parent->parent, "gatwick")) {
/* IRQs on gatwick are offset by 64 */
uap->port.irq = irq_create_mapping(NULL, 64 + 15);
- uap->tx_dma_irq = irq_create_mapping(NULL, 64 + 4);
- uap->rx_dma_irq = irq_create_mapping(NULL, 64 + 5);
}
/* Setup some valid baud rate information in the register
@@ -1526,8 +1492,6 @@ static void pmz_dispose_port(struct uart_pmac_port *uap)
struct device_node *np;
np = uap->node;
- iounmap(uap->rx_dma_regs);
- iounmap(uap->tx_dma_regs);
iounmap(uap->control_reg);
uap->node = NULL;
of_node_put(np);
diff --git a/drivers/tty/serial/pmac_zilog.h b/drivers/tty/serial/pmac_zilog.h
index fa85b0de5c2f..87337b748d6d 100644
--- a/drivers/tty/serial/pmac_zilog.h
+++ b/drivers/tty/serial/pmac_zilog.h
@@ -43,7 +43,6 @@ struct uart_pmac_port {
#define PMACZILOG_FLAG_TX_ACTIVE 0x00000040
#define PMACZILOG_FLAG_IS_IRDA 0x00000100
#define PMACZILOG_FLAG_IS_INTMODEM 0x00000200
-#define PMACZILOG_FLAG_HAS_DMA 0x00000400
#define PMACZILOG_FLAG_RSRC_REQUESTED 0x00000800
#define PMACZILOG_FLAG_IS_OPEN 0x00002000
#define PMACZILOG_FLAG_IS_EXTCLK 0x00008000
@@ -55,13 +54,6 @@ struct uart_pmac_port {
volatile u8 __iomem *control_reg;
volatile u8 __iomem *data_reg;
-#ifdef CONFIG_PPC_PMAC
- unsigned int tx_dma_irq;
- unsigned int rx_dma_irq;
- volatile struct dbdma_regs __iomem *tx_dma_regs;
- volatile struct dbdma_regs __iomem *rx_dma_regs;
-#endif
-
unsigned char irq_name[8];
struct ktermios termios_cache;
@@ -377,7 +369,6 @@ static inline void zssync(struct uart_pmac_port *port)
#define ZS_WANTS_MODEM_STATUS(UP) ((UP)->flags & PMACZILOG_FLAG_MODEM_STATUS)
#define ZS_IS_IRDA(UP) ((UP)->flags & PMACZILOG_FLAG_IS_IRDA)
#define ZS_IS_INTMODEM(UP) ((UP)->flags & PMACZILOG_FLAG_IS_INTMODEM)
-#define ZS_HAS_DMA(UP) ((UP)->flags & PMACZILOG_FLAG_HAS_DMA)
#define ZS_IS_OPEN(UP) ((UP)->flags & PMACZILOG_FLAG_IS_OPEN)
#define ZS_IS_EXTCLK(UP) ((UP)->flags & PMACZILOG_FLAG_IS_EXTCLK)
--
2.36.1
