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authorTony Lindgren <tony@atomide.com>2010-02-15 09:26:07 -0800
committerTony Lindgren <tony@atomide.com>2010-02-15 09:26:07 -0800
commitbe26a3df0b80307bf8f73cea535c112210151bb9 (patch)
tree8e3d90563b6d689ad37500929c05c211153295be /arch/arm/mach-omap1
parent918cae14872c56446415299fc17cf98704c9a537 (diff)
parent61b603b4ee0c70708539e2fa5c3d47f17b7c7849 (diff)
downloadop-kernel-dev-be26a3df0b80307bf8f73cea535c112210151bb9.zip
op-kernel-dev-be26a3df0b80307bf8f73cea535c112210151bb9.tar.gz
Merge branch 'debug-ll' into omap-for-linus
Diffstat (limited to 'arch/arm/mach-omap1')
-rw-r--r--arch/arm/mach-omap1/include/mach/debug-macro.S90
-rw-r--r--arch/arm/mach-omap1/serial.c6
2 files changed, 79 insertions, 17 deletions
diff --git a/arch/arm/mach-omap1/include/mach/debug-macro.S b/arch/arm/mach-omap1/include/mach/debug-macro.S
index aedb746..b6d9584 100644
--- a/arch/arm/mach-omap1/include/mach/debug-macro.S
+++ b/arch/arm/mach-omap1/include/mach/debug-macro.S
@@ -11,18 +11,80 @@
*
*/
- .macro addruart,rx
+#include <linux/serial_reg.h>
+
+#include <plat/serial.h>
+
+ .pushsection .data
+omap_uart_phys: .word 0x0
+omap_uart_virt: .word 0x0
+ .popsection
+
+ /*
+ * Note that this code won't work if the bootloader passes
+ * a wrong machine ID number in r1. To debug, just hardcode
+ * the desired UART phys and virt addresses temporarily into
+ * the omap_uart_phys and omap_uart_virt above.
+ */
+ .macro addruart, rx, tmp
+
+ /* Use omap_uart_phys/virt if already configured */
+9: mrc p15, 0, \rx, c1, c0
+ tst \rx, #1 @ MMU enabled?
+ ldreq \rx, =omap_uart_phys @ physical base address
+ ldrne \rx, =omap_uart_virt @ virtual base
+ ldr \rx, [\rx, #0]
+ cmp \rx, #0 @ is port configured?
+ bne 99f @ already configured
+
+ /* Check 7XX UART1 scratchpad register for uart to use */
+ mrc p15, 0, \rx, c1, c0
+ tst \rx, #1 @ MMU enabled?
+ moveq \rx, #0xff000000 @ physical base address
+ movne \rx, #0xfe000000 @ virtual base
+ orr \rx, \rx, #0x00fb0000 @ OMAP1UART1
+ ldrb \rx, [\rx, #(UART_SCR << OMAP7XX_PORT_SHIFT)]
+ cmp \rx, #0 @ anything in 7XX scratchpad?
+ bne 10f @ found 7XX uart
+
+ /* Check 15xx/16xx UART1 scratchpad register for uart to use */
mrc p15, 0, \rx, c1, c0
tst \rx, #1 @ MMU enabled?
moveq \rx, #0xff000000 @ physical base address
movne \rx, #0xfe000000 @ virtual base
- orr \rx, \rx, #0x00fb0000
-#ifdef CONFIG_OMAP_LL_DEBUG_UART3
- orr \rx, \rx, #0x00009000 @ UART 3
-#endif
-#if defined(CONFIG_OMAP_LL_DEBUG_UART2) || defined(CONFIG_OMAP_LL_DEBUG_UART3)
- orr \rx, \rx, #0x00000800 @ UART 2 & 3
-#endif
+ orr \rx, \rx, #0x00fb0000 @ OMAP1UART1
+ ldrb \rx, [\rx, #(UART_SCR << OMAP_PORT_SHIFT)]
+
+ /* Select the UART to use based on the UART1 scratchpad value */
+10: cmp \rx, #0 @ no port configured?
+ beq 11f @ if none, try to use UART1
+ cmp \rx, #OMAP1UART1
+ beq 11f @ configure OMAP1UART1
+ cmp \rx, #OMAP1UART2
+ beq 12f @ configure OMAP1UART2
+ cmp \rx, #OMAP1UART3
+ beq 13f @ configure OMAP2UART3
+
+ /* Configure the UART offset from the phys/virt base */
+11: mov \rx, #0x00fb0000 @ OMAP1UART1
+ b 98f
+12: mov \rx, #0x00fb0000 @ OMAP1UART1
+ orr \rx, \rx, #0x00000800 @ OMAP1UART2
+ b 98f
+13: mov \rx, #0x00fb0000 @ OMAP1UART1
+ orr \rx, \rx, #0x00000800 @ OMAP1UART2
+ orr \rx, \rx, #0x00009000 @ OMAP1UART3
+
+ /* Store both phys and virt address for the uart */
+98: add \rx, \rx, #0xff000000 @ phys base
+ ldr \tmp, =omap_uart_phys
+ str \rx, [\tmp, #0]
+ sub \rx, \rx, #0xff000000 @ phys base
+ add \rx, \rx, #0xfe000000 @ virt base
+ ldr \tmp, =omap_uart_virt
+ str \rx, [\tmp, #0]
+ b 9b
+99:
.endm
.macro senduart,rd,rx
@@ -30,13 +92,13 @@
.endm
.macro busyuart,rd,rx
-1001: ldrb \rd, [\rx, #(0x5 << 2)] @ OMAP-1510 and friends
- and \rd, \rd, #0x60
- teq \rd, #0x60
+1001: ldrb \rd, [\rx, #(UART_LSR << OMAP_PORT_SHIFT)]
+ and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
+ teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
beq 1002f
- ldrb \rd, [\rx, #(0x5 << 0)] @ OMAP-730 only
- and \rd, \rd, #0x60
- teq \rd, #0x60
+ ldrb \rd, [\rx, #(UART_LSR << OMAP7XX_PORT_SHIFT)]
+ and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
+ teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
bne 1001b
1002:
.endm
diff --git a/arch/arm/mach-omap1/serial.c b/arch/arm/mach-omap1/serial.c
index 6e5207c..349de90 100644
--- a/arch/arm/mach-omap1/serial.c
+++ b/arch/arm/mach-omap1/serial.c
@@ -64,7 +64,7 @@ static void __init omap_serial_reset(struct plat_serial8250_port *p)
static struct plat_serial8250_port serial_platform_data[] = {
{
- .mapbase = OMAP_UART1_BASE,
+ .mapbase = OMAP1_UART1_BASE,
.irq = INT_UART1,
.flags = UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
@@ -72,7 +72,7 @@ static struct plat_serial8250_port serial_platform_data[] = {
.uartclk = OMAP16XX_BASE_BAUD * 16,
},
{
- .mapbase = OMAP_UART2_BASE,
+ .mapbase = OMAP1_UART2_BASE,
.irq = INT_UART2,
.flags = UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
@@ -80,7 +80,7 @@ static struct plat_serial8250_port serial_platform_data[] = {
.uartclk = OMAP16XX_BASE_BAUD * 16,
},
{
- .mapbase = OMAP_UART3_BASE,
+ .mapbase = OMAP1_UART3_BASE,
.irq = INT_UART3,
.flags = UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
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