From dabad54949930844d237af4b55c14eaff829c888 Mon Sep 17 00:00:00 2001 From: Aaron Wu Date: Thu, 15 Mar 2018 18:50:11 +0800 Subject: misc: Remove Blackfin DSP echo support Remove Blackfin DSP echo support Signed-off-by: Aaron Wu Signed-off-by: Arnd Bergmann --- drivers/misc/echo/fir.h | 50 ------------------------------------------------- 1 file changed, 50 deletions(-) (limited to 'drivers/misc/echo/fir.h') diff --git a/drivers/misc/echo/fir.h b/drivers/misc/echo/fir.h index 7b9fabf1fea5..4e0f365f0577 100644 --- a/drivers/misc/echo/fir.h +++ b/drivers/misc/echo/fir.h @@ -27,14 +27,6 @@ #define _FIR_H_ /* - Blackfin NOTES & IDEAS: - - A simple dot product function is used to implement the filter. This performs - just one MAC/cycle which is inefficient but was easy to implement as a first - pass. The current Blackfin code also uses an unrolled form of the filter - history to avoid 0 length hardware loop issues. This is wasteful of - memory. - Ideas for improvement: 1/ Rewrite filter for dual MAC inner loop. The issue here is handling @@ -94,21 +86,13 @@ static inline const int16_t *fir16_create(struct fir16_state_t *fir, fir->taps = taps; fir->curr_pos = taps - 1; fir->coeffs = coeffs; -#if defined(__bfin__) - fir->history = kcalloc(2 * taps, sizeof(int16_t), GFP_KERNEL); -#else fir->history = kcalloc(taps, sizeof(int16_t), GFP_KERNEL); -#endif return fir->history; } static inline void fir16_flush(struct fir16_state_t *fir) { -#if defined(__bfin__) - memset(fir->history, 0, 2 * fir->taps * sizeof(int16_t)); -#else memset(fir->history, 0, fir->taps * sizeof(int16_t)); -#endif } static inline void fir16_free(struct fir16_state_t *fir) @@ -116,42 +100,9 @@ static inline void fir16_free(struct fir16_state_t *fir) kfree(fir->history); } -#ifdef __bfin__ -static inline int32_t dot_asm(short *x, short *y, int len) -{ - int dot; - - len--; - - __asm__("I0 = %1;\n\t" - "I1 = %2;\n\t" - "A0 = 0;\n\t" - "R0.L = W[I0++] || R1.L = W[I1++];\n\t" - "LOOP dot%= LC0 = %3;\n\t" - "LOOP_BEGIN dot%=;\n\t" - "A0 += R0.L * R1.L (IS) || R0.L = W[I0++] || R1.L = W[I1++];\n\t" - "LOOP_END dot%=;\n\t" - "A0 += R0.L*R1.L (IS);\n\t" - "R0 = A0;\n\t" - "%0 = R0;\n\t" - : "=&d"(dot) - : "a"(x), "a"(y), "a"(len) - : "I0", "I1", "A1", "A0", "R0", "R1" - ); - - return dot; -} -#endif - static inline int16_t fir16(struct fir16_state_t *fir, int16_t sample) { int32_t y; -#if defined(__bfin__) - fir->history[fir->curr_pos] = sample; - fir->history[fir->curr_pos + fir->taps] = sample; - y = dot_asm((int16_t *) fir->coeffs, &fir->history[fir->curr_pos], - fir->taps); -#else int i; int offset1; int offset2; @@ -165,7 +116,6 @@ static inline int16_t fir16(struct fir16_state_t *fir, int16_t sample) y += fir->coeffs[i] * fir->history[i - offset1]; for (; i >= 0; i--) y += fir->coeffs[i] * fir->history[i + offset2]; -#endif if (fir->curr_pos <= 0) fir->curr_pos = fir->taps; fir->curr_pos--; -- cgit v1.2.3