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Diffstat (limited to 'arch/arm/mach-omap2/serial.c')
-rw-r--r--arch/arm/mach-omap2/serial.c80
1 files changed, 63 insertions, 17 deletions
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index e10a02df6e1d..b79bc8926cc9 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -23,6 +23,7 @@
#include <linux/serial_reg.h>
#include <linux/clk.h>
#include <linux/io.h>
+#include <linux/delay.h>
#include <plat/common.h>
#include <plat/board.h>
@@ -80,7 +81,6 @@ static LIST_HEAD(uart_list);
static struct plat_serial8250_port serial_platform_data0[] = {
{
- .mapbase = OMAP_UART1_BASE,
.irq = 72,
.flags = UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
@@ -93,7 +93,6 @@ static struct plat_serial8250_port serial_platform_data0[] = {
static struct plat_serial8250_port serial_platform_data1[] = {
{
- .mapbase = OMAP_UART2_BASE,
.irq = 73,
.flags = UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
@@ -106,7 +105,6 @@ static struct plat_serial8250_port serial_platform_data1[] = {
static struct plat_serial8250_port serial_platform_data2[] = {
{
- .mapbase = OMAP_UART3_BASE,
.irq = 74,
.flags = UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
@@ -117,10 +115,9 @@ static struct plat_serial8250_port serial_platform_data2[] = {
}
};
-#ifdef CONFIG_ARCH_OMAP4
+#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
static struct plat_serial8250_port serial_platform_data3[] = {
{
- .mapbase = OMAP_UART4_BASE,
.irq = 70,
.flags = UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
@@ -130,7 +127,26 @@ static struct plat_serial8250_port serial_platform_data3[] = {
.flags = 0
}
};
+
+static inline void omap2_set_globals_uart4(struct omap_globals *omap2_globals)
+{
+ serial_platform_data3[0].mapbase = omap2_globals->uart4_phys;
+}
+#else
+static inline void omap2_set_globals_uart4(struct omap_globals *omap2_globals)
+{
+}
#endif
+
+void __init omap2_set_globals_uart(struct omap_globals *omap2_globals)
+{
+ serial_platform_data0[0].mapbase = omap2_globals->uart1_phys;
+ serial_platform_data1[0].mapbase = omap2_globals->uart2_phys;
+ serial_platform_data2[0].mapbase = omap2_globals->uart3_phys;
+ if (cpu_is_omap3630() || cpu_is_omap44xx())
+ omap2_set_globals_uart4(omap2_globals);
+}
+
static inline unsigned int __serial_read_reg(struct uart_port *up,
int offset)
{
@@ -145,6 +161,13 @@ static inline unsigned int serial_read_reg(struct plat_serial8250_port *up,
return (unsigned int)__raw_readb(up->membase + offset);
}
+static inline void __serial_write_reg(struct uart_port *up, int offset,
+ int value)
+{
+ offset <<= up->regshift;
+ __raw_writeb(value, up->membase + offset);
+}
+
static inline void serial_write_reg(struct plat_serial8250_port *p, int offset,
int value)
{
@@ -574,7 +597,7 @@ static struct omap_uart_state omap_uart[] = {
},
},
},
-#ifdef CONFIG_ARCH_OMAP4
+#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
{
.pdev = {
.name = "serial8250",
@@ -605,6 +628,20 @@ static unsigned int serial_in_override(struct uart_port *up, int offset)
return __serial_read_reg(up, offset);
}
+static void serial_out_override(struct uart_port *up, int offset, int value)
+{
+ unsigned int status, tmout = 10000;
+
+ status = __serial_read_reg(up, UART_LSR);
+ while (!(status & UART_LSR_THRE)) {
+ /* Wait up to 10ms for the character(s) to be sent. */
+ if (--tmout == 0)
+ break;
+ udelay(1);
+ status = __serial_read_reg(up, UART_LSR);
+ }
+ __serial_write_reg(up, offset, value);
+}
void __init omap_serial_early_init(void)
{
int i;
@@ -701,15 +738,19 @@ void __init omap_serial_init_port(int port)
DEV_CREATE_FILE(dev, &dev_attr_sleep_timeout);
}
- /* omap44xx: Never read empty UART fifo
- * omap3xxx: Never read empty UART fifo on UARTs
- * with IP rev >=0x52
- */
- if (cpu_is_omap44xx())
- uart->p->serial_in = serial_in_override;
- else if ((serial_read_reg(uart->p, UART_OMAP_MVER) & 0xFF)
- >= UART_OMAP_NO_EMPTY_FIFO_READ_IP_REV)
- uart->p->serial_in = serial_in_override;
+ /*
+ * omap44xx: Never read empty UART fifo
+ * omap3xxx: Never read empty UART fifo on UARTs
+ * with IP rev >=0x52
+ */
+ if (cpu_is_omap44xx()) {
+ uart->p->serial_in = serial_in_override;
+ uart->p->serial_out = serial_out_override;
+ } else if ((serial_read_reg(uart->p, UART_OMAP_MVER) & 0xFF)
+ >= UART_OMAP_NO_EMPTY_FIFO_READ_IP_REV) {
+ uart->p->serial_in = serial_in_override;
+ uart->p->serial_out = serial_out_override;
+ }
}
/**
@@ -721,8 +762,13 @@ void __init omap_serial_init_port(int port)
*/
void __init omap_serial_init(void)
{
- int i;
+ int i, nr_ports;
+
+ if (!(cpu_is_omap3630() || cpu_is_omap4430()))
+ nr_ports = 3;
+ else
+ nr_ports = ARRAY_SIZE(omap_uart);
- for (i = 0; i < ARRAY_SIZE(omap_uart); i++)
+ for (i = 0; i < nr_ports; i++)
omap_serial_init_port(i);
}