* (C) Copyright 2000-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
- * MA 02110-1301 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <config.h>
#include <asm/blackfin.h>
#include <asm/io.h>
-#include <asm/mach-common/bits/dma.h>
+#include <asm/dma.h>
char *strcpy(char *dest, const char *src)
{
return __res1;
}
-#ifdef bfin_write_MDMA1_D0_IRQ_STATUS
-# define bfin_write_MDMA_D0_IRQ_STATUS bfin_write_MDMA1_D0_IRQ_STATUS
-# define bfin_write_MDMA_D0_START_ADDR bfin_write_MDMA1_D0_START_ADDR
-# define bfin_write_MDMA_D0_X_COUNT bfin_write_MDMA1_D0_X_COUNT
-# define bfin_write_MDMA_D0_X_MODIFY bfin_write_MDMA1_D0_X_MODIFY
-# define bfin_write_MDMA_D0_CONFIG bfin_write_MDMA1_D0_CONFIG
-# define bfin_write_MDMA_S0_START_ADDR bfin_write_MDMA1_S0_START_ADDR
-# define bfin_write_MDMA_S0_X_COUNT bfin_write_MDMA1_S0_X_COUNT
-# define bfin_write_MDMA_S0_X_MODIFY bfin_write_MDMA1_S0_X_MODIFY
-# define bfin_write_MDMA_S0_CONFIG bfin_write_MDMA1_S0_CONFIG
-# define bfin_write_MDMA_D0_IRQ_STATUS bfin_write_MDMA1_D0_IRQ_STATUS
-# define bfin_read_MDMA_D0_IRQ_STATUS bfin_read_MDMA1_D0_IRQ_STATUS
+#ifdef MDMA1_D0_NEXT_DESC_PTR
+# define MDMA_D0_NEXT_DESC_PTR MDMA1_D0_NEXT_DESC_PTR
+# define MDMA_S0_NEXT_DESC_PTR MDMA1_S0_NEXT_DESC_PTR
+#endif
+
+static void dma_calc_size(unsigned long ldst, unsigned long lsrc, size_t count,
+ unsigned long *dshift, unsigned long *bpos)
+{
+ unsigned long limit;
+
+#ifdef MSIZE
+ /* The max memory DMA memory transfer size is 32 bytes. */
+ limit = 5;
+ *dshift = MSIZE_P;
+#else
+ /* The max memory DMA memory transfer size is 4 bytes. */
+ limit = 2;
+ *dshift = WDSIZE_P;
#endif
+
+ *bpos = min(limit, ffs(ldst | lsrc | count)) - 1;
+}
+
/* This version misbehaves for count values of 0 and 2^16+.
* Perhaps we should detect that ? Nowhere do we actually
* use dma memcpy for those types of lengths though ...
*/
void dma_memcpy_nocache(void *dst, const void *src, size_t count)
{
- uint16_t wdsize, mod;
+ struct dma_register *mdma_d0 = (void *)MDMA_D0_NEXT_DESC_PTR;
+ struct dma_register *mdma_s0 = (void *)MDMA_S0_NEXT_DESC_PTR;
+ unsigned long ldst = (unsigned long)dst;
+ unsigned long lsrc = (unsigned long)src;
+ unsigned long dshift, bpos;
+ uint32_t dsize, mod;
/* Disable DMA in case it's still running (older u-boot's did not
* always turn them off). Do it before the if statement below so
* we can be cheap and not do a SSYNC() due to the forced abort.
*/
- bfin_write_MDMA_D0_CONFIG(0);
- bfin_write_MDMA_S0_CONFIG(0);
- bfin_write_MDMA_D0_IRQ_STATUS(DMA_RUN | DMA_DONE | DMA_ERR);
+ bfin_write(&mdma_d0->config, 0);
+ bfin_write(&mdma_s0->config, 0);
+ bfin_write(&mdma_d0->status, DMA_RUN | DMA_DONE | DMA_ERR);
/* Scratchpad cannot be a DMA source or destination */
- if (((unsigned long)src >= L1_SRAM_SCRATCH &&
- (unsigned long)src < L1_SRAM_SCRATCH_END) ||
- ((unsigned long)dst >= L1_SRAM_SCRATCH &&
- (unsigned long)dst < L1_SRAM_SCRATCH_END))
+ if ((lsrc >= L1_SRAM_SCRATCH && lsrc < L1_SRAM_SCRATCH_END) ||
+ (ldst >= L1_SRAM_SCRATCH && ldst < L1_SRAM_SCRATCH_END))
hang();
- if (((unsigned long)dst | (unsigned long)src | count) & 0x1) {
- wdsize = WDSIZE_8;
- mod = 1;
- } else if (((unsigned long)dst | (unsigned long)src | count) & 0x2) {
- wdsize = WDSIZE_16;
- count >>= 1;
- mod = 2;
- } else {
- wdsize = WDSIZE_32;
- count >>= 2;
- mod = 4;
- }
+ dma_calc_size(ldst, lsrc, count, &dshift, &bpos);
+ dsize = bpos << dshift;
+ count >>= bpos;
+ mod = 1 << bpos;
+
+#ifdef PSIZE
+ /* The max memory DMA peripheral transfer size is 4 bytes. */
+ dsize |= min(2, bpos) << PSIZE_P;
+#endif
/* Copy sram functions from sdram to sram */
/* Setup destination start address */
- bfin_write_MDMA_D0_START_ADDR(dst);
+ bfin_write(&mdma_d0->start_addr, ldst);
/* Setup destination xcount */
- bfin_write_MDMA_D0_X_COUNT(count);
+ bfin_write(&mdma_d0->x_count, count);
/* Setup destination xmodify */
- bfin_write_MDMA_D0_X_MODIFY(mod);
+ bfin_write(&mdma_d0->x_modify, mod);
/* Setup Source start address */
- bfin_write_MDMA_S0_START_ADDR(src);
+ bfin_write(&mdma_s0->start_addr, lsrc);
/* Setup Source xcount */
- bfin_write_MDMA_S0_X_COUNT(count);
+ bfin_write(&mdma_s0->x_count, count);
/* Setup Source xmodify */
- bfin_write_MDMA_S0_X_MODIFY(mod);
+ bfin_write(&mdma_s0->x_modify, mod);
/* Enable source DMA */
- bfin_write_MDMA_S0_CONFIG(wdsize | DMAEN);
- bfin_write_MDMA_D0_CONFIG(wdsize | DMAEN | WNR | DI_EN);
+ bfin_write(&mdma_s0->config, dsize | DMAEN);
+ bfin_write(&mdma_d0->config, dsize | DMAEN | WNR | DI_EN);
SSYNC();
- while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE))
+ while (!(bfin_read(&mdma_d0->status) & DMA_DONE))
continue;
- bfin_write_MDMA_D0_IRQ_STATUS(DMA_RUN | DMA_DONE | DMA_ERR);
- bfin_write_MDMA_D0_CONFIG(0);
- bfin_write_MDMA_S0_CONFIG(0);
+ bfin_write(&mdma_d0->status, DMA_RUN | DMA_DONE | DMA_ERR);
+ bfin_write(&mdma_d0->config, 0);
+ bfin_write(&mdma_s0->config, 0);
}
/* We should do a dcache invalidate on the destination after the dma, but since
* we lack such hardware capability, we'll flush/invalidate the destination
projects / karo-tx-uboot.git / blobdiff