Commit 0c8219f0 authored by Tony Lindgren's avatar Tony Lindgren
Browse files

omap: Make uncompress code and DEBUG_LL code generic



Define arch_decomp_setup() the same way as some other
architectures do. Use arch_id to configure the debug uart
based on the machine_is by storing it into the uart
scratchpad register for DEBUG_LL code to use.
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 4f2c49fe
......@@ -15,18 +15,76 @@
#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
......
......@@ -15,32 +15,103 @@
#include <plat/serial.h>
#define UART_OFFSET(addr) ((addr) & 0x00ffffff)
.pushsection .data
omap_uart_phys: .word 0
omap_uart_virt: .word 0
omap_uart_lsr: .word 0
.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 */
10: 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 address
ldr \rx, [\rx, #0]
cmp \rx, #0 @ is port configured?
bne 99f @ already configured
/* Check UART1 scratchpad register for uart to use */
mrc p15, 0, \rx, c1, c0
tst \rx, #1 @ MMU enabled?
#ifdef CONFIG_ARCH_OMAP2
moveq \rx, #0x48000000 @ physical base address
movne \rx, #0xfa000000 @ virtual base
orr \rx, \rx, #0x0006a000
#ifdef CONFIG_OMAP_LL_DEBUG_UART2
add \rx, \rx, #0x00002000 @ UART 2
#endif
#ifdef CONFIG_OMAP_LL_DEBUG_UART3
add \rx, \rx, #0x00004000 @ UART 3
#endif
#elif defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_ARCH_OMAP4)
moveq \rx, #0x48000000 @ physical base address
movne \rx, #0xfa000000 @ virtual base
orr \rx, \rx, #0x0006a000
#ifdef CONFIG_OMAP_LL_DEBUG_UART2
add \rx, \rx, #0x00002000 @ UART 2
#endif
#ifdef CONFIG_OMAP_LL_DEBUG_UART3
add \rx, \rx, #0x00fb0000 @ UART 3
add \rx, \rx, #0x00006000
#endif
#endif
orr \rx, \rx, #0x0006a000 @ uart1 on omap2/3/4
ldrb \rx, [\rx, #(UART_SCR << OMAP_PORT_SHIFT)] @ scratchpad
/* Select the UART to use based on the UART1 scratchpad value */
cmp \rx, #0 @ no port configured?
beq 21f @ if none, try to use UART1
cmp \rx, #OMAP2UART1 @ OMAP2/3/4UART1
beq 21f @ configure OMAP2/3/4UART1
cmp \rx, #OMAP2UART2 @ OMAP2/3/4UART2
beq 22f @ configure OMAP2/3/4UART2
cmp \rx, #OMAP2UART3 @ only on 24xx
beq 23f @ configure OMAP2UART3
cmp \rx, #OMAP3UART3 @ only on 34xx
beq 33f @ configure OMAP3UART3
cmp \rx, #OMAP4UART3 @ only on 44xx
beq 43f @ configure OMAP4UART3
cmp \rx, #OMAP3UART4 @ only on 36xx
beq 34f @ configure OMAP3UART4
cmp \rx, #OMAP4UART4 @ only on 44xx
beq 44f @ configure OMAP4UART4
cmp \rx, #ZOOM_UART @ only on zoom2/3
beq 95f @ configure ZOOM_UART
/* Configure the UART offset from the phys/virt base */
21: mov \rx, #UART_OFFSET(OMAP2_UART1_BASE) @ omap2/3/4
b 98f
22: mov \rx, #UART_OFFSET(OMAP2_UART2_BASE) @ omap2/3/4
b 98f
23: mov \rx, #UART_OFFSET(OMAP2_UART3_BASE)
b 98f
33: mov \rx, #UART_OFFSET(OMAP3_UART1_BASE)
add \rx, \rx, #0x00fb0000
add \rx, \rx, #0x00006000 @ OMAP3_UART3_BASE
b 98f
34: mov \rx, #UART_OFFSET(OMAP3_UART1_BASE)
add \rx, \rx, #0x00fb0000
add \rx, \rx, #0x00028000 @ OMAP3_UART4_BASE
b 98f
43: mov \rx, #UART_OFFSET(OMAP4_UART3_BASE)
b 98f
44: mov \rx, #UART_OFFSET(OMAP4_UART4_BASE)
b 98f
95: mov \rx, #ZOOM_UART_BASE
ldr \tmp, =omap_uart_phys
str \rx, [\tmp, #0]
mov \rx, #ZOOM_UART_VIRT
ldr \tmp, =omap_uart_virt
str \rx, [\tmp, #0]
mov \rx, #(UART_LSR << ZOOM_PORT_SHIFT)
ldr \tmp, =omap_uart_lsr
str \rx, [\tmp, #0]
b 10b
/* Store both phys and virt address for the uart */
98: add \rx, \rx, #0x48000000 @ phys base
ldr \tmp, =omap_uart_phys
str \rx, [\tmp, #0]
sub \rx, \rx, #0x48000000 @ phys base
add \rx, \rx, #0xfa000000 @ virt base
ldr \tmp, =omap_uart_virt
str \rx, [\tmp, #0]
mov \rx, #(UART_LSR << OMAP_PORT_SHIFT)
ldr \tmp, =omap_uart_lsr
str \rx, [\tmp, #0]
b 10b
99:
.endm
.macro senduart,rd,rx
......@@ -48,7 +119,9 @@
.endm
.macro busyuart,rd,rx
1001: ldrb \rd, [\rx, #(UART_LSR << OMAP_PORT_SHIFT)]
1001: ldr \rd, =omap_uart_lsr
ldr \rd, [\rd, #0]
ldrb \rd, [\rx, \rd]
and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
bne 1001b
......
......@@ -26,24 +26,49 @@
#define OMAP2_UART3_BASE 0x4806e000
/* OMAP3 serial ports */
#define OMAP3_UART1_BASE 0x4806a000
#define OMAP3_UART2_BASE 0x4806c000
#define OMAP3_UART1_BASE OMAP2_UART1_BASE
#define OMAP3_UART2_BASE OMAP2_UART2_BASE
#define OMAP3_UART3_BASE 0x49020000
#define OMAP3_UART4_BASE 0x49042000 /* Only on 36xx */
/* OMAP4 serial ports */
#define OMAP4_UART1_BASE 0x4806a000
#define OMAP4_UART2_BASE 0x4806c000
#define OMAP4_UART1_BASE OMAP2_UART1_BASE
#define OMAP4_UART2_BASE OMAP2_UART2_BASE
#define OMAP4_UART3_BASE 0x48020000
#define OMAP4_UART4_BASE 0x4806e000
/* External port on Zoom2/3 */
#define ZOOM_UART_BASE 0x10000000
#define ZOOM_UART_VIRT 0xfb000000
#define OMAP_PORT_SHIFT 2
#define OMAP7XX_PORT_SHIFT 0
#define ZOOM_PORT_SHIFT 1
#define OMAP1510_BASE_BAUD (12000000/16)
#define OMAP16XX_BASE_BAUD (48000000/16)
#define OMAP24XX_BASE_BAUD (48000000/16)
/*
* DEBUG_LL port encoding stored into the UART1 scratchpad register by
* decomp_setup in uncompress.h
*/
#define OMAP1UART1 11
#define OMAP1UART2 12
#define OMAP1UART3 13
#define OMAP2UART1 21
#define OMAP2UART2 22
#define OMAP2UART3 23
#define OMAP3UART1 OMAP2UART1
#define OMAP3UART2 OMAP2UART2
#define OMAP3UART3 33
#define OMAP3UART4 34 /* Only on 36xx */
#define OMAP4UART1 OMAP2UART1
#define OMAP4UART2 OMAP2UART2
#define OMAP4UART3 43
#define OMAP4UART4 44
#define ZOOM_UART 95 /* Only on zoom2/3 */
/* This is only used by 8250.c for omap1510 */
#define is_omap_port(pt) ({int __ret = 0; \
if ((pt)->port.mapbase == OMAP1_UART1_BASE || \
......
......@@ -19,71 +19,155 @@
#include <linux/types.h>
#include <linux/serial_reg.h>
#include <asm/mach-types.h>
#include <plat/serial.h>
unsigned int system_rev;
static volatile u8 *uart1_base;
static int uart1_shift;
#define UART_OMAP_MDR1 0x08 /* mode definition register */
#define OMAP_ID_730 0x355F
#define OMAP_ID_850 0x362C
#define ID_MASK 0x7fff
#define check_port(base, shift) ((base[UART_OMAP_MDR1 << shift] & 7) == 0)
#define omap_get_id() ((*(volatile unsigned int *)(0xfffed404)) >> 12) & ID_MASK
static volatile u8 *uart_base;
static int uart_shift;
static void putc(int c)
/*
* Store the DEBUG_LL uart number into UART1 scratchpad register.
* See also debug-macro.S, and serial.c for related code.
*
* Please note that we currently assume that:
* - UART1 clocks are enabled for register access
* - UART1 scratchpad register can be used
*/
static void set_uart1_scratchpad(unsigned char port)
{
volatile u8 * uart = 0;
int shift = 2;
#ifdef CONFIG_MACH_OMAP_PALMTE
return;
#endif
#ifdef CONFIG_ARCH_OMAP
/* Will get removed in the next patch, set to OMAP3 to compile */
#ifdef CONFIG_OMAP_LL_DEBUG_UART3
uart = (volatile u8 *)(OMAP3_UART3_BASE);
#elif defined(CONFIG_OMAP_LL_DEBUG_UART2)
uart = (volatile u8 *)(OMAP3_UART2_BASE);
#elif defined(CONFIG_OMAP_LL_DEBUG_UART1)
uart = (volatile u8 *)(OMAP3_UART1_BASE);
#elif defined(CONFIG_OMAP_LL_DEBUG_NONE)
return;
#else
return;
#endif
#ifdef CONFIG_ARCH_OMAP1
/* Determine which serial port to use */
do {
/* MMU is not on, so cpu_is_omapXXXX() won't work here */
unsigned int omap_id = omap_get_id();
if (omap_id == OMAP_ID_730 || omap_id == OMAP_ID_850)
shift = 0;
uart1_base[UART_SCR << uart1_shift] = port;
}
if (check_port(uart, shift))
break;
/* Silent boot if no serial ports are enabled. */
static void putc(int c)
{
if (!uart_base)
return;
} while (0);
#endif /* CONFIG_ARCH_OMAP1 */
#endif
/*
* Now, xmit each character
*/
while (!(uart[UART_LSR << shift] & UART_LSR_THRE))
while (!(uart_base[UART_LSR << uart_shift] & UART_LSR_THRE))
barrier();
uart[UART_TX << shift] = c;
uart_base[UART_TX << uart_shift] = c;
}
static inline void flush(void)
{
}
/*
* Macros to configure UART1 and debug UART
*/
#define _DEBUG_LL_ENTRY(mach, uart1_phys, uart1_shft, \
dbg_uart, dbg_shft, dbg_id) \
if (machine_is_##mach()) { \
uart1_base = (volatile u8 *)(uart1_phys); \
uart1_shift = (uart1_shft); \
uart_base = (volatile u8 *)(dbg_uart); \
uart_shift = (dbg_shft); \
port = (dbg_id); \
set_uart1_scratchpad(port); \
break; \
}
#define DEBUG_LL_OMAP7XX(p, mach) \
_DEBUG_LL_ENTRY(mach, OMAP1_UART1_BASE, OMAP7XX_PORT_SHIFT, \
OMAP1_UART##p##_BASE, OMAP7XX_PORT_SHIFT, OMAP1UART##p)
#define DEBUG_LL_OMAP1(p, mach) \
_DEBUG_LL_ENTRY(mach, OMAP1_UART1_BASE, OMAP_PORT_SHIFT, \
OMAP1_UART##p##_BASE, OMAP_PORT_SHIFT, OMAP1UART##p)
#define DEBUG_LL_OMAP2(p, mach) \
_DEBUG_LL_ENTRY(mach, OMAP2_UART1_BASE, OMAP_PORT_SHIFT, \
OMAP2_UART##p##_BASE, OMAP_PORT_SHIFT, OMAP2UART##p)
#define DEBUG_LL_OMAP3(p, mach) \
_DEBUG_LL_ENTRY(mach, OMAP3_UART1_BASE, OMAP_PORT_SHIFT, \
OMAP3_UART##p##_BASE, OMAP_PORT_SHIFT, OMAP3UART##p)
#define DEBUG_LL_OMAP4(p, mach) \
_DEBUG_LL_ENTRY(mach, OMAP4_UART1_BASE, OMAP_PORT_SHIFT, \
OMAP4_UART##p##_BASE, OMAP_PORT_SHIFT, OMAP4UART##p)
/* Zoom2/3 shift is different for UART1 and external port */
#define DEBUG_LL_ZOOM(mach) \
_DEBUG_LL_ENTRY(mach, OMAP2_UART1_BASE, OMAP_PORT_SHIFT, \
ZOOM_UART_BASE, ZOOM_PORT_SHIFT, ZOOM_UART)
static inline void __arch_decomp_setup(unsigned long arch_id)
{
int port = 0;
/*
* Initialize the port based on the machine ID from the bootloader.
* Note that we're using macros here instead of switch statement
* as machine_is functions are optimized out for the boards that
* are not selected.
*/
do {
/* omap7xx/8xx based boards using UART1 with shift 0 */
DEBUG_LL_OMAP7XX(1, herald);
DEBUG_LL_OMAP7XX(1, omap_perseus2);
/* omap15xx/16xx based boards using UART1 */
DEBUG_LL_OMAP1(1, ams_delta);
DEBUG_LL_OMAP1(1, nokia770);
DEBUG_LL_OMAP1(1, omap_h2);
DEBUG_LL_OMAP1(1, omap_h3);
DEBUG_LL_OMAP1(1, omap_innovator);
DEBUG_LL_OMAP1(1, omap_osk);
DEBUG_LL_OMAP1(1, omap_palmte);
DEBUG_LL_OMAP1(1, omap_palmz71);
/* omap15xx/16xx based boards using UART2 */
DEBUG_LL_OMAP1(2, omap_palmtt);
/* omap15xx/16xx based boards using UART3 */
DEBUG_LL_OMAP1(3, sx1);
/* omap2 based boards using UART1 */
DEBUG_LL_OMAP2(1, omap2evm);
DEBUG_LL_OMAP2(1, omap_2430sdp);
DEBUG_LL_OMAP2(1, omap_apollon);
DEBUG_LL_OMAP2(1, omap_h4);
/* omap2 based boards using UART3 */
DEBUG_LL_OMAP2(3, nokia_n800);
DEBUG_LL_OMAP2(3, nokia_n810);
DEBUG_LL_OMAP2(3, nokia_n810_wimax);
/* omap3 based boards using UART1 */
DEBUG_LL_OMAP2(1, omap3evm);
DEBUG_LL_OMAP3(1, omap_3430sdp);
DEBUG_LL_OMAP3(1, omap_3630sdp);
/* omap3 based boards using UART3 */
DEBUG_LL_OMAP3(3, cm_t35);
DEBUG_LL_OMAP3(3, igep0020);
DEBUG_LL_OMAP3(3, nokia_rx51);
DEBUG_LL_OMAP3(3, omap3517evm);
DEBUG_LL_OMAP3(3, omap3_beagle);
DEBUG_LL_OMAP3(3, omap3_pandora);
DEBUG_LL_OMAP3(3, omap_ldp);
DEBUG_LL_OMAP3(3, overo);
DEBUG_LL_OMAP3(3, touchbook);
/* omap4 based boards using UART3 */
DEBUG_LL_OMAP4(3, omap_4430sdp);
/* zoom2/3 external uart */
DEBUG_LL_ZOOM(omap_zoom2);
DEBUG_LL_ZOOM(omap_zoom3);
} while (0);
}
#define arch_decomp_setup() __arch_decomp_setup(arch_id)
/*
* nothing to do
*/
#define arch_decomp_setup()
#define arch_decomp_wdog()
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