target_phys_addr_t is unwieldly, violates the C standard (_t suffixes are
reserved) and its purpose doesn't match the name (most target_phys_addr_t
addresses are not target specific).  Replace it with a finger-friendly,
standards conformant hwaddr.
Outstanding patchsets can be fixed up with the command
  git rebase -i --exec 'find -name "*.[ch]"
                        | xargs s/target_phys_addr_t/hwaddr/g' origin
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
		
	
		
			
				
	
	
		
			648 lines
		
	
	
		
			17 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			648 lines
		
	
	
		
			17 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
/*
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 * Arm PrimeCell PL041 Advanced Audio Codec Interface
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 *
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 * Copyright (c) 2011
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 * Written by Mathieu Sonet - www.elasticsheep.com
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 *
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 * This code is licensed under the GPL.
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 *
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 * *****************************************************************
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 *
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 * This driver emulates the ARM AACI interface
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 * connected to a LM4549 codec.
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 *
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 * Limitations:
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 * - Supports only a playback on one channel (Versatile/Vexpress)
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 * - Supports only one TX FIFO in compact-mode or non-compact mode.
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 * - Supports playback of 12, 16, 18 and 20 bits samples.
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 * - Record is not supported.
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 * - The PL041 is hardwired to a LM4549 codec.
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 *
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 */
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#include "sysbus.h"
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#include "pl041.h"
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#include "lm4549.h"
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#if 0
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#define PL041_DEBUG_LEVEL 1
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#endif
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#if defined(PL041_DEBUG_LEVEL) && (PL041_DEBUG_LEVEL >= 1)
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#define DBG_L1(fmt, ...) \
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do { printf("pl041: " fmt , ## __VA_ARGS__); } while (0)
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#else
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#define DBG_L1(fmt, ...) \
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do { } while (0)
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#endif
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#if defined(PL041_DEBUG_LEVEL) && (PL041_DEBUG_LEVEL >= 2)
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#define DBG_L2(fmt, ...) \
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do { printf("pl041: " fmt , ## __VA_ARGS__); } while (0)
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#else
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#define DBG_L2(fmt, ...) \
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do { } while (0)
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#endif
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#define MAX_FIFO_DEPTH      (1024)
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#define DEFAULT_FIFO_DEPTH  (8)
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#define SLOT1_RW    (1 << 19)
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/* This FIFO only stores 20-bit samples on 32-bit words.
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   So its level is independent of the selected mode */
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typedef struct {
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    uint32_t level;
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    uint32_t data[MAX_FIFO_DEPTH];
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} pl041_fifo;
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typedef struct {
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    pl041_fifo tx_fifo;
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    uint8_t tx_enabled;
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    uint8_t tx_compact_mode;
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    uint8_t tx_sample_size;
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    pl041_fifo rx_fifo;
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    uint8_t rx_enabled;
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    uint8_t rx_compact_mode;
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    uint8_t rx_sample_size;
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} pl041_channel;
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typedef struct {
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    SysBusDevice busdev;
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    MemoryRegion iomem;
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    qemu_irq irq;
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    uint32_t fifo_depth; /* FIFO depth in non-compact mode */
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    pl041_regfile regs;
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    pl041_channel fifo1;
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    lm4549_state codec;
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} pl041_state;
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static const unsigned char pl041_default_id[8] = {
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    0x41, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1
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};
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#if defined(PL041_DEBUG_LEVEL)
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#define REGISTER(name, offset) #name,
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static const char *pl041_regs_name[] = {
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    #include "pl041.hx"
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};
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#undef REGISTER
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#endif
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#if defined(PL041_DEBUG_LEVEL)
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static const char *get_reg_name(hwaddr offset)
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{
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    if (offset <= PL041_dr1_7) {
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        return pl041_regs_name[offset >> 2];
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    }
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    return "unknown";
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}
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#endif
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static uint8_t pl041_compute_periphid3(pl041_state *s)
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{
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    uint8_t id3 = 1; /* One channel */
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    /* Add the fifo depth information */
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    switch (s->fifo_depth) {
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    case 8:
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        id3 |= 0 << 3;
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        break;
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    case 32:
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        id3 |= 1 << 3;
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        break;
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    case 64:
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        id3 |= 2 << 3;
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        break;
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    case 128:
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        id3 |= 3 << 3;
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        break;
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    case 256:
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        id3 |= 4 << 3;
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        break;
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    case 512:
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        id3 |= 5 << 3;
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        break;
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    case 1024:
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        id3 |= 6 << 3;
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        break;
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    case 2048:
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        id3 |= 7 << 3;
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        break;
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    }
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    return id3;
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}
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static void pl041_reset(pl041_state *s)
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{
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    DBG_L1("pl041_reset\n");
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    memset(&s->regs, 0x00, sizeof(pl041_regfile));
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    s->regs.slfr = SL1TXEMPTY | SL2TXEMPTY | SL12TXEMPTY;
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    s->regs.sr1 = TXFE | RXFE | TXHE;
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    s->regs.isr1 = 0;
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    memset(&s->fifo1, 0x00, sizeof(s->fifo1));
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}
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static void pl041_fifo1_write(pl041_state *s, uint32_t value)
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{
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    pl041_channel *channel = &s->fifo1;
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    pl041_fifo *fifo = &s->fifo1.tx_fifo;
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    /* Push the value in the FIFO */
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    if (channel->tx_compact_mode == 0) {
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        /* Non-compact mode */
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        if (fifo->level < s->fifo_depth) {
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            /* Pad the value with 0 to obtain a 20-bit sample */
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            switch (channel->tx_sample_size) {
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            case 12:
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                value = (value << 8) & 0xFFFFF;
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                break;
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            case 16:
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                value = (value << 4) & 0xFFFFF;
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                break;
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            case 18:
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                value = (value << 2) & 0xFFFFF;
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                break;
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            case 20:
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            default:
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                break;
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            }
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            /* Store the sample in the FIFO */
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            fifo->data[fifo->level++] = value;
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        }
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#if defined(PL041_DEBUG_LEVEL)
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        else {
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            DBG_L1("fifo1 write: overrun\n");
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        }
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#endif
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    } else {
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        /* Compact mode */
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        if ((fifo->level + 2) < s->fifo_depth) {
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            uint32_t i = 0;
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            uint32_t sample = 0;
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            for (i = 0; i < 2; i++) {
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                sample = value & 0xFFFF;
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                value = value >> 16;
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                /* Pad each sample with 0 to obtain a 20-bit sample */
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                switch (channel->tx_sample_size) {
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                case 12:
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                    sample = sample << 8;
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                    break;
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                case 16:
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                default:
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                    sample = sample << 4;
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                    break;
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                }
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                /* Store the sample in the FIFO */
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                fifo->data[fifo->level++] = sample;
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            }
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        }
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#if defined(PL041_DEBUG_LEVEL)
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        else {
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            DBG_L1("fifo1 write: overrun\n");
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        }
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#endif
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    }
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    /* Update the status register */
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    if (fifo->level > 0) {
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        s->regs.sr1 &= ~(TXUNDERRUN | TXFE);
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    }
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    if (fifo->level >= (s->fifo_depth / 2)) {
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        s->regs.sr1 &= ~TXHE;
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    }
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    if (fifo->level >= s->fifo_depth) {
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        s->regs.sr1 |= TXFF;
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    }
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    DBG_L2("fifo1_push sr1 = 0x%08x\n", s->regs.sr1);
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}
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static void pl041_fifo1_transmit(pl041_state *s)
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{
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    pl041_channel *channel = &s->fifo1;
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    pl041_fifo *fifo = &s->fifo1.tx_fifo;
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    uint32_t slots = s->regs.txcr1 & TXSLOT_MASK;
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    uint32_t written_samples;
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    /* Check if FIFO1 transmit is enabled */
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    if ((channel->tx_enabled) && (slots & (TXSLOT3 | TXSLOT4))) {
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        if (fifo->level >= (s->fifo_depth / 2)) {
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            int i;
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            DBG_L1("Transfer FIFO level = %i\n", fifo->level);
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            /* Try to transfer the whole FIFO */
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            for (i = 0; i < (fifo->level / 2); i++) {
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                uint32_t left = fifo->data[i * 2];
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                uint32_t right = fifo->data[i * 2 + 1];
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                 /* Transmit two 20-bit samples to the codec */
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                if (lm4549_write_samples(&s->codec, left, right) == 0) {
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                    DBG_L1("Codec buffer full\n");
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                    break;
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                }
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            }
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            written_samples = i * 2;
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            if (written_samples > 0) {
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                /* Update the FIFO level */
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                fifo->level -= written_samples;
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                /* Move back the pending samples to the start of the FIFO */
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                for (i = 0; i < fifo->level; i++) {
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                    fifo->data[i] = fifo->data[written_samples + i];
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                }
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                /* Update the status register */
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                s->regs.sr1 &= ~TXFF;
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                if (fifo->level <= (s->fifo_depth / 2)) {
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                    s->regs.sr1 |= TXHE;
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                }
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                if (fifo->level == 0) {
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                    s->regs.sr1 |= TXFE | TXUNDERRUN;
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                    DBG_L1("Empty FIFO\n");
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                }
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            }
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        }
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    }
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}
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static void pl041_isr1_update(pl041_state *s)
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{
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    /* Update ISR1 */
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    if (s->regs.sr1 & TXUNDERRUN) {
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        s->regs.isr1 |= URINTR;
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    } else {
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        s->regs.isr1 &= ~URINTR;
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    }
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    if (s->regs.sr1 & TXHE) {
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        s->regs.isr1 |= TXINTR;
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    } else {
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        s->regs.isr1 &= ~TXINTR;
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    }
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    if (!(s->regs.sr1 & TXBUSY) && (s->regs.sr1 & TXFE)) {
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        s->regs.isr1 |= TXCINTR;
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    } else {
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        s->regs.isr1 &= ~TXCINTR;
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    }
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    /* Update the irq state */
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    qemu_set_irq(s->irq, ((s->regs.isr1 & s->regs.ie1) > 0) ? 1 : 0);
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    DBG_L2("Set interrupt sr1 = 0x%08x isr1 = 0x%08x masked = 0x%08x\n",
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           s->regs.sr1, s->regs.isr1, s->regs.isr1 & s->regs.ie1);
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}
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static void pl041_request_data(void *opaque)
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{
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    pl041_state *s = (pl041_state *)opaque;
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    /* Trigger pending transfers */
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    pl041_fifo1_transmit(s);
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    pl041_isr1_update(s);
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}
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static uint64_t pl041_read(void *opaque, hwaddr offset,
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                                unsigned size)
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{
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    pl041_state *s = (pl041_state *)opaque;
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    int value;
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    if ((offset >= PL041_periphid0) && (offset <= PL041_pcellid3)) {
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        if (offset == PL041_periphid3) {
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            value = pl041_compute_periphid3(s);
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        } else {
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            value = pl041_default_id[(offset - PL041_periphid0) >> 2];
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        }
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        DBG_L1("pl041_read [0x%08x] => 0x%08x\n", offset, value);
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        return value;
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    } else if (offset <= PL041_dr4_7) {
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        value = *((uint32_t *)&s->regs + (offset >> 2));
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    } else {
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        DBG_L1("pl041_read: Reserved offset %x\n", (int)offset);
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        return 0;
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    }
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    switch (offset) {
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    case PL041_allints:
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        value = s->regs.isr1 & 0x7F;
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        break;
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    }
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    DBG_L1("pl041_read [0x%08x] %s => 0x%08x\n", offset,
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           get_reg_name(offset), value);
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    return value;
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}
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static void pl041_write(void *opaque, hwaddr offset,
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                             uint64_t value, unsigned size)
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{
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    pl041_state *s = (pl041_state *)opaque;
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    uint16_t control, data;
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    uint32_t result;
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    DBG_L1("pl041_write [0x%08x] %s <= 0x%08x\n", offset,
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           get_reg_name(offset), (unsigned int)value);
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    /* Write the register */
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    if (offset <= PL041_dr4_7) {
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        *((uint32_t *)&s->regs + (offset >> 2)) = value;
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    } else {
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        DBG_L1("pl041_write: Reserved offset %x\n", (int)offset);
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        return;
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    }
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    /* Execute the actions */
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    switch (offset) {
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    case PL041_txcr1:
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    {
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        pl041_channel *channel = &s->fifo1;
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        uint32_t txen = s->regs.txcr1 & TXEN;
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        uint32_t tsize = (s->regs.txcr1 & TSIZE_MASK) >> TSIZE_MASK_BIT;
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        uint32_t compact_mode = (s->regs.txcr1 & TXCOMPACT) ? 1 : 0;
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#if defined(PL041_DEBUG_LEVEL)
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        uint32_t slots = (s->regs.txcr1 & TXSLOT_MASK) >> TXSLOT_MASK_BIT;
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        uint32_t txfen = (s->regs.txcr1 & TXFEN) > 0 ? 1 : 0;
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#endif
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        DBG_L1("=> txen = %i slots = 0x%01x tsize = %i compact = %i "
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               "txfen = %i\n", txen, slots,  tsize, compact_mode, txfen);
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        channel->tx_enabled = txen;
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        channel->tx_compact_mode = compact_mode;
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        switch (tsize) {
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        case 0:
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            channel->tx_sample_size = 16;
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            break;
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        case 1:
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            channel->tx_sample_size = 18;
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            break;
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        case 2:
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            channel->tx_sample_size = 20;
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            break;
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        case 3:
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            channel->tx_sample_size = 12;
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            break;
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        }
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        DBG_L1("TX enabled = %i\n", channel->tx_enabled);
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        DBG_L1("TX compact mode = %i\n", channel->tx_compact_mode);
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        DBG_L1("TX sample width = %i\n", channel->tx_sample_size);
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        /* Check if compact mode is allowed with selected tsize */
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        if (channel->tx_compact_mode == 1) {
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            if ((channel->tx_sample_size == 18) ||
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                (channel->tx_sample_size == 20)) {
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                channel->tx_compact_mode = 0;
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                DBG_L1("Compact mode not allowed with 18/20-bit sample size\n");
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            }
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        }
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        break;
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    }
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    case PL041_sl1tx:
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        s->regs.slfr &= ~SL1TXEMPTY;
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        control = (s->regs.sl1tx >> 12) & 0x7F;
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        data = (s->regs.sl2tx >> 4) & 0xFFFF;
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        if ((s->regs.sl1tx & SLOT1_RW) == 0) {
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            /* Write operation */
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            lm4549_write(&s->codec, control, data);
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        } else {
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            /* Read operation */
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            result = lm4549_read(&s->codec, control);
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						|
 | 
						|
            /* Store the returned value */
 | 
						|
            s->regs.sl1rx = s->regs.sl1tx & ~SLOT1_RW;
 | 
						|
            s->regs.sl2rx = result << 4;
 | 
						|
 | 
						|
            s->regs.slfr &= ~(SL1RXBUSY | SL2RXBUSY);
 | 
						|
            s->regs.slfr |= SL1RXVALID | SL2RXVALID;
 | 
						|
        }
 | 
						|
        break;
 | 
						|
 | 
						|
    case PL041_sl2tx:
 | 
						|
        s->regs.sl2tx = value;
 | 
						|
        s->regs.slfr &= ~SL2TXEMPTY;
 | 
						|
        break;
 | 
						|
 | 
						|
    case PL041_intclr:
 | 
						|
        DBG_L1("=> Clear interrupt intclr = 0x%08x isr1 = 0x%08x\n",
 | 
						|
               s->regs.intclr, s->regs.isr1);
 | 
						|
 | 
						|
        if (s->regs.intclr & TXUEC1) {
 | 
						|
            s->regs.sr1 &= ~TXUNDERRUN;
 | 
						|
        }
 | 
						|
        break;
 | 
						|
 | 
						|
    case PL041_maincr:
 | 
						|
    {
 | 
						|
#if defined(PL041_DEBUG_LEVEL)
 | 
						|
        char debug[] = " AACIFE  SL1RXEN  SL1TXEN";
 | 
						|
        if (!(value & AACIFE)) {
 | 
						|
            debug[0] = '!';
 | 
						|
        }
 | 
						|
        if (!(value & SL1RXEN)) {
 | 
						|
            debug[8] = '!';
 | 
						|
        }
 | 
						|
        if (!(value & SL1TXEN)) {
 | 
						|
            debug[17] = '!';
 | 
						|
        }
 | 
						|
        DBG_L1("%s\n", debug);
 | 
						|
#endif
 | 
						|
 | 
						|
        if ((s->regs.maincr & AACIFE) == 0) {
 | 
						|
            pl041_reset(s);
 | 
						|
        }
 | 
						|
        break;
 | 
						|
    }
 | 
						|
 | 
						|
    case PL041_dr1_0:
 | 
						|
    case PL041_dr1_1:
 | 
						|
    case PL041_dr1_2:
 | 
						|
    case PL041_dr1_3:
 | 
						|
        pl041_fifo1_write(s, value);
 | 
						|
        break;
 | 
						|
    }
 | 
						|
 | 
						|
    /* Transmit the FIFO content */
 | 
						|
    pl041_fifo1_transmit(s);
 | 
						|
 | 
						|
    /* Update the ISR1 register */
 | 
						|
    pl041_isr1_update(s);
 | 
						|
}
 | 
						|
 | 
						|
static void pl041_device_reset(DeviceState *d)
 | 
						|
{
 | 
						|
    pl041_state *s = DO_UPCAST(pl041_state, busdev.qdev, d);
 | 
						|
 | 
						|
    pl041_reset(s);
 | 
						|
}
 | 
						|
 | 
						|
static const MemoryRegionOps pl041_ops = {
 | 
						|
    .read = pl041_read,
 | 
						|
    .write = pl041_write,
 | 
						|
    .endianness = DEVICE_NATIVE_ENDIAN,
 | 
						|
};
 | 
						|
 | 
						|
static int pl041_init(SysBusDevice *dev)
 | 
						|
{
 | 
						|
    pl041_state *s = FROM_SYSBUS(pl041_state, dev);
 | 
						|
 | 
						|
    DBG_L1("pl041_init 0x%08x\n", (uint32_t)s);
 | 
						|
 | 
						|
    /* Check the device properties */
 | 
						|
    switch (s->fifo_depth) {
 | 
						|
    case 8:
 | 
						|
    case 32:
 | 
						|
    case 64:
 | 
						|
    case 128:
 | 
						|
    case 256:
 | 
						|
    case 512:
 | 
						|
    case 1024:
 | 
						|
    case 2048:
 | 
						|
        break;
 | 
						|
    case 16:
 | 
						|
    default:
 | 
						|
        /* NC FIFO depth of 16 is not allowed because its id bits in
 | 
						|
           AACIPERIPHID3 overlap with the id for the default NC FIFO depth */
 | 
						|
        qemu_log_mask(LOG_UNIMP,
 | 
						|
                      "pl041: unsupported non-compact fifo depth [%i]\n",
 | 
						|
                      s->fifo_depth);
 | 
						|
        return -1;
 | 
						|
    }
 | 
						|
 | 
						|
    /* Connect the device to the sysbus */
 | 
						|
    memory_region_init_io(&s->iomem, &pl041_ops, s, "pl041", 0x1000);
 | 
						|
    sysbus_init_mmio(dev, &s->iomem);
 | 
						|
    sysbus_init_irq(dev, &s->irq);
 | 
						|
 | 
						|
    /* Init the codec */
 | 
						|
    lm4549_init(&s->codec, &pl041_request_data, (void *)s);
 | 
						|
 | 
						|
    return 0;
 | 
						|
}
 | 
						|
 | 
						|
static const VMStateDescription vmstate_pl041_regfile = {
 | 
						|
    .name = "pl041_regfile",
 | 
						|
    .version_id = 1,
 | 
						|
    .minimum_version_id = 1,
 | 
						|
    .minimum_version_id_old = 1,
 | 
						|
    .fields      = (VMStateField[]) {
 | 
						|
#define REGISTER(name, offset) VMSTATE_UINT32(name, pl041_regfile),
 | 
						|
        #include "pl041.hx"
 | 
						|
#undef REGISTER
 | 
						|
        VMSTATE_END_OF_LIST()
 | 
						|
    }
 | 
						|
};
 | 
						|
 | 
						|
static const VMStateDescription vmstate_pl041_fifo = {
 | 
						|
    .name = "pl041_fifo",
 | 
						|
    .version_id = 1,
 | 
						|
    .minimum_version_id = 1,
 | 
						|
    .minimum_version_id_old = 1,
 | 
						|
    .fields      = (VMStateField[]) {
 | 
						|
        VMSTATE_UINT32(level, pl041_fifo),
 | 
						|
        VMSTATE_UINT32_ARRAY(data, pl041_fifo, MAX_FIFO_DEPTH),
 | 
						|
        VMSTATE_END_OF_LIST()
 | 
						|
    }
 | 
						|
};
 | 
						|
 | 
						|
static const VMStateDescription vmstate_pl041_channel = {
 | 
						|
    .name = "pl041_channel",
 | 
						|
    .version_id = 1,
 | 
						|
    .minimum_version_id = 1,
 | 
						|
    .minimum_version_id_old = 1,
 | 
						|
    .fields      = (VMStateField[]) {
 | 
						|
        VMSTATE_STRUCT(tx_fifo, pl041_channel, 0,
 | 
						|
                       vmstate_pl041_fifo, pl041_fifo),
 | 
						|
        VMSTATE_UINT8(tx_enabled, pl041_channel),
 | 
						|
        VMSTATE_UINT8(tx_compact_mode, pl041_channel),
 | 
						|
        VMSTATE_UINT8(tx_sample_size, pl041_channel),
 | 
						|
        VMSTATE_STRUCT(rx_fifo, pl041_channel, 0,
 | 
						|
                       vmstate_pl041_fifo, pl041_fifo),
 | 
						|
        VMSTATE_UINT8(rx_enabled, pl041_channel),
 | 
						|
        VMSTATE_UINT8(rx_compact_mode, pl041_channel),
 | 
						|
        VMSTATE_UINT8(rx_sample_size, pl041_channel),
 | 
						|
        VMSTATE_END_OF_LIST()
 | 
						|
    }
 | 
						|
};
 | 
						|
 | 
						|
static const VMStateDescription vmstate_pl041 = {
 | 
						|
    .name = "pl041",
 | 
						|
    .version_id = 1,
 | 
						|
    .minimum_version_id = 1,
 | 
						|
    .fields = (VMStateField[]) {
 | 
						|
        VMSTATE_UINT32(fifo_depth, pl041_state),
 | 
						|
        VMSTATE_STRUCT(regs, pl041_state, 0,
 | 
						|
                       vmstate_pl041_regfile, pl041_regfile),
 | 
						|
        VMSTATE_STRUCT(fifo1, pl041_state, 0,
 | 
						|
                       vmstate_pl041_channel, pl041_channel),
 | 
						|
        VMSTATE_STRUCT(codec, pl041_state, 0,
 | 
						|
                       vmstate_lm4549_state, lm4549_state),
 | 
						|
        VMSTATE_END_OF_LIST()
 | 
						|
    }
 | 
						|
};
 | 
						|
 | 
						|
static Property pl041_device_properties[] = {
 | 
						|
    /* Non-compact FIFO depth property */
 | 
						|
    DEFINE_PROP_UINT32("nc_fifo_depth", pl041_state, fifo_depth, DEFAULT_FIFO_DEPTH),
 | 
						|
    DEFINE_PROP_END_OF_LIST(),
 | 
						|
};
 | 
						|
 | 
						|
static void pl041_device_class_init(ObjectClass *klass, void *data)
 | 
						|
{
 | 
						|
    DeviceClass *dc = DEVICE_CLASS(klass);
 | 
						|
    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 | 
						|
 | 
						|
    k->init = pl041_init;
 | 
						|
    dc->no_user = 1;
 | 
						|
    dc->reset = pl041_device_reset;
 | 
						|
    dc->vmsd = &vmstate_pl041;
 | 
						|
    dc->props = pl041_device_properties;
 | 
						|
}
 | 
						|
 | 
						|
static TypeInfo pl041_device_info = {
 | 
						|
    .name          = "pl041",
 | 
						|
    .parent        = TYPE_SYS_BUS_DEVICE,
 | 
						|
    .instance_size = sizeof(pl041_state),
 | 
						|
    .class_init    = pl041_device_class_init,
 | 
						|
};
 | 
						|
 | 
						|
static void pl041_register_types(void)
 | 
						|
{
 | 
						|
    type_register_static(&pl041_device_info);
 | 
						|
}
 | 
						|
 | 
						|
type_init(pl041_register_types)
 |