diff options
Diffstat (limited to 'drivers/media/dvb/mantis/mantis_dma.c')
| -rw-r--r-- | drivers/media/dvb/mantis/mantis_dma.c | 92 |
1 files changed, 35 insertions, 57 deletions
diff --git a/drivers/media/dvb/mantis/mantis_dma.c b/drivers/media/dvb/mantis/mantis_dma.c index 46202a4..c61ca7d 100644 --- a/drivers/media/dvb/mantis/mantis_dma.c +++ b/drivers/media/dvb/mantis/mantis_dma.c @@ -43,13 +43,17 @@ #define RISC_IRQ (0x01 << 24) #define RISC_STATUS(status) ((((~status) & 0x0f) << 20) | ((status & 0x0f) << 16)) -#define RISC_FLUSH() (mantis->risc_pos = 0) -#define RISC_INSTR(opcode) (mantis->risc_cpu[mantis->risc_pos++] = cpu_to_le32(opcode)) +#define RISC_FLUSH(risc_pos) (risc_pos = 0) +#define RISC_INSTR(risc_pos, opcode) (mantis->risc_cpu[risc_pos++] = cpu_to_le32(opcode)) #define MANTIS_BUF_SIZE (64 * 1024) -#define MANTIS_BLOCK_BYTES (MANTIS_BUF_SIZE >> 4) -#define MANTIS_BLOCK_COUNT (1 << 4) -#define MANTIS_RISC_SIZE PAGE_SIZE +#define MANTIS_BLOCK_BYTES (MANTIS_BUF_SIZE / 4) +#define MANTIS_DMA_TR_BYTES (2 * 1024) /* upper limit: 4095 bytes. */ +#define MANTIS_BLOCK_COUNT (MANTIS_BUF_SIZE / MANTIS_BLOCK_BYTES) + +#define MANTIS_DMA_TR_UNITS (MANTIS_BLOCK_BYTES / MANTIS_DMA_TR_BYTES) +/* MANTIS_BUF_SIZE / MANTIS_DMA_TR_UNITS must not exceed MANTIS_RISC_SIZE (4k RISC cmd buffer) */ +#define MANTIS_RISC_SIZE PAGE_SIZE /* RISC program must fit here. */ int mantis_dma_exit(struct mantis_pci *mantis) { @@ -124,27 +128,6 @@ err: return -ENOMEM; } -static inline int mantis_calc_lines(struct mantis_pci *mantis) -{ - mantis->line_bytes = MANTIS_BLOCK_BYTES; - mantis->line_count = MANTIS_BLOCK_COUNT; - - while (mantis->line_bytes > 4095) { - mantis->line_bytes >>= 1; - mantis->line_count <<= 1; - } - - dprintk(MANTIS_DEBUG, 1, "Mantis RISC block bytes=[%d], line bytes=[%d], line count=[%d]", - MANTIS_BLOCK_BYTES, mantis->line_bytes, mantis->line_count); - - if (mantis->line_count > 255) { - dprintk(MANTIS_ERROR, 1, "Buffer size error"); - return -EINVAL; - } - - return 0; -} - int mantis_dma_init(struct mantis_pci *mantis) { int err = 0; @@ -158,12 +141,6 @@ int mantis_dma_init(struct mantis_pci *mantis) goto err; } - err = mantis_calc_lines(mantis); - if (err < 0) { - dprintk(MANTIS_ERROR, 1, "Mantis calc lines failed"); - - goto err; - } return 0; err: @@ -174,31 +151,32 @@ EXPORT_SYMBOL_GPL(mantis_dma_init); static inline void mantis_risc_program(struct mantis_pci *mantis) { u32 buf_pos = 0; - u32 line; + u32 line, step; + u32 risc_pos; dprintk(MANTIS_DEBUG, 1, "Mantis create RISC program"); - RISC_FLUSH(); - - dprintk(MANTIS_DEBUG, 1, "risc len lines %u, bytes per line %u", - mantis->line_count, mantis->line_bytes); - - for (line = 0; line < mantis->line_count; line++) { - dprintk(MANTIS_DEBUG, 1, "RISC PROG line=[%d]", line); - if (!(buf_pos % MANTIS_BLOCK_BYTES)) { - RISC_INSTR(RISC_WRITE | - RISC_IRQ | - RISC_STATUS(((buf_pos / MANTIS_BLOCK_BYTES) + - (MANTIS_BLOCK_COUNT - 1)) % - MANTIS_BLOCK_COUNT) | - mantis->line_bytes); - } else { - RISC_INSTR(RISC_WRITE | mantis->line_bytes); - } - RISC_INSTR(mantis->buf_dma + buf_pos); - buf_pos += mantis->line_bytes; + RISC_FLUSH(risc_pos); + + dprintk(MANTIS_DEBUG, 1, "risc len lines %u, bytes per line %u, bytes per DMA tr %u", + MANTIS_BLOCK_COUNT, MANTIS_BLOCK_BYTES, MANTIS_DMA_TR_BYTES); + + for (line = 0; line < MANTIS_BLOCK_COUNT; line++) { + for (step = 0; step < MANTIS_DMA_TR_UNITS; step++) { + dprintk(MANTIS_DEBUG, 1, "RISC PROG line=[%d], step=[%d]", line, step); + if (step == 0) { + RISC_INSTR(risc_pos, RISC_WRITE | + RISC_IRQ | + RISC_STATUS(line) | + MANTIS_DMA_TR_BYTES); + } else { + RISC_INSTR(risc_pos, RISC_WRITE | MANTIS_DMA_TR_BYTES); + } + RISC_INSTR(risc_pos, mantis->buf_dma + buf_pos); + buf_pos += MANTIS_DMA_TR_BYTES; + } } - RISC_INSTR(RISC_JUMP); - RISC_INSTR(mantis->risc_dma); + RISC_INSTR(risc_pos, RISC_JUMP); + RISC_INSTR(risc_pos, mantis->risc_dma); } void mantis_dma_start(struct mantis_pci *mantis) @@ -210,7 +188,7 @@ void mantis_dma_start(struct mantis_pci *mantis) mmwrite(mmread(MANTIS_GPIF_ADDR) | MANTIS_GPIF_HIFRDWRN, MANTIS_GPIF_ADDR); mmwrite(0, MANTIS_DMA_CTL); - mantis->last_block = mantis->finished_block = 0; + mantis->last_block = mantis->busy_block = 0; mmwrite(mmread(MANTIS_INT_MASK) | MANTIS_INT_RISCI, MANTIS_INT_MASK); @@ -245,9 +223,9 @@ void mantis_dma_xfer(unsigned long data) struct mantis_pci *mantis = (struct mantis_pci *) data; struct mantis_hwconfig *config = mantis->hwconfig; - while (mantis->last_block != mantis->finished_block) { + while (mantis->last_block != mantis->busy_block) { dprintk(MANTIS_DEBUG, 1, "last block=[%d] finished block=[%d]", - mantis->last_block, mantis->finished_block); + mantis->last_block, mantis->busy_block); (config->ts_size ? dvb_dmx_swfilter_204 : dvb_dmx_swfilter) (&mantis->demux, &mantis->buf_cpu[mantis->last_block * MANTIS_BLOCK_BYTES], MANTIS_BLOCK_BYTES); |