diff options
author | Roy Huang <roy.huang@analog.com> | 2007-07-12 22:41:45 +0800 |
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committer | Bryan Wu <bryan.wu@analog.com> | 2007-07-12 22:41:45 +0800 |
commit | 24a07a124198153540f8f43d9e91d16227aba66e (patch) | |
tree | 917b2011e67e224515830833b1151e276b6c6137 /arch/blackfin/mach-bf548/boards/led.S | |
parent | 088eec1192a0ae60fc218796027e622008af36c0 (diff) |
Blackfin arch: initial supporting for BF548-EZKIT
The ADSP-BF54x was specifically designed to meet the needs of convergent multimedia
applications where system performance and cost are essential ingredients. The
integration of multimedia, human interface, and connectivity peripherals combined
with increased system bandwidth and on-chip memory provides customers a platform to
design the most demanding applications.
Since now, ADSP-BF54x will be supported in the Linux kernel and bunch of related drivers
such as USB OTG, ATAPI, NAND flash controller, LCD framebuffer, sound, touch screen will
be submitted later.
Please enjoy the show.
Signed-off-by: Roy Huang <roy.huang@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'arch/blackfin/mach-bf548/boards/led.S')
-rw-r--r-- | arch/blackfin/mach-bf548/boards/led.S | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/arch/blackfin/mach-bf548/boards/led.S b/arch/blackfin/mach-bf548/boards/led.S new file mode 100644 index 000000000000..f47daf3770d0 --- /dev/null +++ b/arch/blackfin/mach-bf548/boards/led.S @@ -0,0 +1,172 @@ +/**************************************************** + * LED1 ---- PG6 LED2 ---- PG7 * + * LED3 ---- PG8 LED4 ---- PG9 * + * LED5 ---- PG10 LED6 ---- PG11 * + ****************************************************/ + +#include <linux/linkage.h> +#include <asm/blackfin.h> + +/* All functions in this file save the registers they uses. + So there is no need to save any registers before calling them. */ + + .text; + +/* Initialize LEDs. */ + +ENTRY(_led_init) + LINK 0; + [--SP] = P0; + [--SP] = R0; + [--SP] = R1; + [--SP] = R2; + R1 = (PG6|PG7|PG8|PG9|PG10|PG11)(Z); + R2 = ~R1; + + P0.H = hi(PORTG_FER); + P0.L = lo(PORTG_FER); + R0 = W[P0](Z); + SSYNC; + R0 = R0 & R2; + W[P0] = R0.L; + SSYNC; + + P0.H = hi(PORTG_DIR_SET); + P0.L = lo(PORTG_DIR_SET); + W[P0] = R1.L; + SSYNC; + + P0.H = hi(PORTG_INEN); + P0.L = lo(PORTG_INEN); + R0 = W[P0](Z); + SSYNC; + R0 = R0 & R2; + W[P0] = R0.L; + SSYNC; + + R2 = [SP++]; + R1 = [SP++]; + R0 = [SP++]; + P0 = [SP++]; + RTS; + .size _led_init, .-_led_init + +/* Set one LED on. Leave other LEDs unchanged. + It expects the LED number passed through R0. */ + +ENTRY(_led_on) + LINK 0; + [--SP] = P0; + [--SP] = R1; + CALL _led_init; + R1 = 1; + R0 += 5; + R1 <<= R0; + P0.H = hi(PORTG_SET); + P0.L = lo(PORTG_SET); + W[P0] = R1.L; + SSYNC; + R1 = [SP++]; + P0 = [SP++]; + UNLINK; + RTS; + .size _led_on, .-_led_on + +/* Set one LED off. Leave other LEDs unchanged. */ + +ENTRY(_led_off) + LINK 0; + [--SP] = P0; + [--SP] = R1; + CALL _led_init; + R1 = 1; + R0 += 5; + R1 <<= R0; + P0.H = hi(PORTG_CLEAR); + P0.L = lo(PORTG_CLEAR); + W[P0] = R1.L; + SSYNC; + R1 = [SP++]; + P0 = [SP++]; + UNLINK; + RTS; + .size _led_off, .-_led_off + +/* Toggle one LED. Leave other LEDs unchanged. */ + +ENTRY(_led_toggle) + LINK 0; + [--SP] = P0; + [--SP] = R1; + CALL _led_init; + R1 = 1; + R0 += 5; + R1 <<= R0; + P0.H = hi(PORTG); + P0.L = lo(PORTG); + R0 = W[P0](Z); + SSYNC; + R0 = R0 ^ R1; + W[P0] = R0.L; + SSYNC; + R1 = [SP++]; + P0 = [SP++]; + UNLINK; + RTS; + .size _led_toggle, .-_led_toggle + +/* Display the number using LEDs in binary format. */ + +ENTRY(_led_disp_num) + LINK 0; + [--SP] = P0; + [--SP] = R1; + [--SP] = R2; + CALL _led_init; + R1 = 0x3f(X); + R0 = R0 & R1; + R2 = 6(X); + R0 <<= R2; + R1 <<= R2; + P0.H = hi(PORTG); + P0.L = lo(PORTG); + R2 = W[P0](Z); + SSYNC; + R1 = ~R1; + R2 = R2 & R1; + R2 = R2 | R0; + W[P0] = R2.L; + SSYNC; + R2 = [SP++]; + R1 = [SP++]; + P0 = [SP++]; + UNLINK; + RTS; + .size _led_disp_num, .-_led_disp_num + +/* Toggle the number using LEDs in binary format. */ + +ENTRY(_led_toggle_num) + LINK 0; + [--SP] = P0; + [--SP] = R1; + [--SP] = R2; + CALL _led_init; + R1 = 0x3f(X); + R0 = R0 & R1; + R1 = 6(X); + R0 <<= R1; + P0.H = hi(PORTG); + P0.L = lo(PORTG); + R1 = W[P0](Z); + SSYNC; + R1 = R1 ^ R0; + W[P0] = R1.L; + SSYNC; + R2 = [SP++]; + R1 = [SP++]; + P0 = [SP++]; + UNLINK; + RTS; + .size _led_toggle_num, .-_led_toggle_num + |