int hal_btif_dma_hw_init(P_MTK_DMA_INFO_STR p_dma_info)
{
int i_ret = 0;
unsigned long base = p_dma_info->base;
P_DMA_VFIFO p_vfifo = p_dma_info->p_vfifo;
P_MTK_BTIF_DMA_VFIFO p_mtk_dma_vfifo = container_of(p_vfifo,
MTK_BTIF_DMA_VFIFO,
vfifo);
if (DMA_DIR_RX == p_dma_info->dir) {
/*Rx DMA*/
/*do hardware reset*/
// BTIF_SET_BIT(RX_DMA_RST(base), DMA_HARD_RST);
// BTIF_CLR_BIT(RX_DMA_RST(base), DMA_HARD_RST);
BTIF_SET_BIT(RX_DMA_RST(base), DMA_WARM_RST);
while((0x01 & BTIF_READ32(RX_DMA_EN(base))));
/*write vfifo base address to VFF_ADDR*/
btif_reg_sync_writel(p_vfifo->phy_addr, RX_DMA_VFF_ADDR(base));
/*write vfifo length to VFF_LEN*/
btif_reg_sync_writel(p_vfifo->vfifo_size, RX_DMA_VFF_LEN(base));
/*write wpt to VFF_WPT*/
btif_reg_sync_writel(p_mtk_dma_vfifo->wpt,
RX_DMA_VFF_WPT(base));
btif_reg_sync_writel(p_mtk_dma_vfifo->rpt,
RX_DMA_VFF_RPT(base));
/*write vff_thre to VFF_THRESHOLD*/
btif_reg_sync_writel(p_vfifo->thre, RX_DMA_VFF_THRE(base));
/*clear Rx DMA's interrupt status*/
BTIF_SET_BIT(RX_DMA_INT_FLAG(base),
RX_DMA_INT_DONE | RX_DMA_INT_THRE);
/*enable Rx IER by default*/
btif_rx_dma_ier_ctrl(p_dma_info, true);
} else {
/*Tx DMA*/
/*do hardware reset*/
// BTIF_SET_BIT(TX_DMA_RST(base), DMA_HARD_RST);
// BTIF_CLR_BIT(TX_DMA_RST(base), DMA_HARD_RST);
BTIF_SET_BIT(TX_DMA_RST(base), DMA_WARM_RST);
while((0x01 & BTIF_READ32(TX_DMA_EN(base))));
/*write vfifo base address to VFF_ADDR*/
btif_reg_sync_writel(p_vfifo->phy_addr, TX_DMA_VFF_ADDR(base));
/*write vfifo length to VFF_LEN*/
btif_reg_sync_writel(p_vfifo->vfifo_size, TX_DMA_VFF_LEN(base));
/*write wpt to VFF_WPT*/
btif_reg_sync_writel(p_mtk_dma_vfifo->wpt,
TX_DMA_VFF_WPT(base));
btif_reg_sync_writel(p_mtk_dma_vfifo->rpt,
TX_DMA_VFF_RPT(base));
/*write vff_thre to VFF_THRESHOLD*/
btif_reg_sync_writel(p_vfifo->thre, TX_DMA_VFF_THRE(base));
BTIF_CLR_BIT(TX_DMA_INT_FLAG(base), TX_DMA_INT_FLAG_MASK);
hal_btif_dma_ier_ctrl(p_dma_info, false);
}
return i_ret;
}
/*****************************************************************************
* FUNCTION
* hal_rx_dma_irq_handler
* DESCRIPTION
* lower level rx interrupt handler
* PARAMETERS
* p_dma_info [IN] pointer to BTIF dma channel's information
* p_buf [IN/OUT] pointer to rx data buffer
* max_len [IN] max length of rx buffer
* RETURNS
* 0 means success, negative means fail
*****************************************************************************/
int hal_rx_dma_irq_handler(P_MTK_DMA_INFO_STR p_dma_info,
unsigned char *p_buf, const unsigned int max_len)
{
int i_ret = -1;
unsigned int valid_len = 0;
unsigned int wpt_wrap = 0;
unsigned int rpt_wrap = 0;
unsigned int wpt = 0;
unsigned int rpt = 0;
unsigned int tail_len = 0;
unsigned int real_len = 0;
unsigned int base = p_dma_info->base;
P_DMA_VFIFO p_vfifo = p_dma_info->p_vfifo;
dma_rx_buf_write rx_cb = p_dma_info->rx_cb;
unsigned char *p_vff_buf = NULL;
unsigned char *vff_base = p_vfifo->p_vir_addr;
unsigned int vff_size = p_vfifo->vfifo_size;
P_MTK_BTIF_DMA_VFIFO p_mtk_vfifo = container_of(p_vfifo,
MTK_BTIF_DMA_VFIFO,
vfifo);
unsigned long flag = 0;
spin_lock_irqsave(&(g_clk_cg_spinlock), flag);
if (0 == clock_is_on(MTK_BTIF_APDMA_CLK_CG)) {
spin_unlock_irqrestore(&(g_clk_cg_spinlock), flag);
BTIF_ERR_FUNC("%s: clock is off before irq handle done!!!\n",
__FILE__);
return i_ret;
}
/*disable DMA Rx IER*/
hal_btif_dma_ier_ctrl(p_dma_info, false);
/*clear Rx DMA's interrupt status*/
BTIF_SET_BIT(RX_DMA_INT_FLAG(base), RX_DMA_INT_DONE | RX_DMA_INT_THRE);
valid_len = BTIF_READ32(RX_DMA_VFF_VALID_SIZE(base));
rpt = BTIF_READ32(RX_DMA_VFF_RPT(base));
wpt = BTIF_READ32(RX_DMA_VFF_WPT(base));
if ((0 == valid_len) && (rpt == wpt)) {
BTIF_DBG_FUNC
("rx interrupt, no data available in Rx DMA, wpt(0x%08x), rpt(0x%08x)\n",
rpt, wpt);
}
i_ret = 0;
while ((0 < valid_len) || (rpt != wpt)) {
rpt_wrap = rpt & DMA_RPT_WRAP;
wpt_wrap = wpt & DMA_WPT_WRAP;
rpt &= DMA_RPT_MASK;
wpt &= DMA_WPT_MASK;
/*calcaute length of available data in vFIFO*/
if (wpt_wrap != p_mtk_vfifo->last_wpt_wrap) {
real_len = wpt + vff_size - rpt;
} else {
real_len = wpt - rpt;
}
if (NULL != rx_cb) {
tail_len = vff_size - rpt;
p_vff_buf = vff_base + rpt;
if (tail_len >= real_len) {
(*rx_cb) (p_dma_info, p_vff_buf, real_len);
} else {
(*rx_cb) (p_dma_info, p_vff_buf, tail_len);
p_vff_buf = vff_base;
(*rx_cb) (p_dma_info, p_vff_buf, real_len -
tail_len);
}
i_ret += real_len;
} else {
BTIF_ERR_FUNC
("no rx_cb found, please check your init process\n");
}
dsb();
rpt += real_len;
if (rpt >= vff_size) {
/*read wrap bit should be revert*/
rpt_wrap ^= DMA_RPT_WRAP;
rpt %= vff_size;
}
rpt |= rpt_wrap;
/*record wpt, last_wpt_wrap, rpt, last_rpt_wrap*/
p_mtk_vfifo->wpt = wpt;
p_mtk_vfifo->last_wpt_wrap = wpt_wrap;
p_mtk_vfifo->rpt = rpt;
p_mtk_vfifo->last_rpt_wrap = rpt_wrap;
/*update rpt information to DMA controller*/
btif_reg_sync_writel(rpt, RX_DMA_VFF_RPT(base));
/*get vff valid size again and check if rx data is processed completely*/
valid_len = BTIF_READ32(RX_DMA_VFF_VALID_SIZE(base));
rpt = BTIF_READ32(RX_DMA_VFF_RPT(base));
wpt = BTIF_READ32(RX_DMA_VFF_WPT(base));
}
/*enable DMA Rx IER*/
hal_btif_dma_ier_ctrl(p_dma_info, true);
spin_unlock_irqrestore(&(g_clk_cg_spinlock), flag);
return i_ret;
}
static int hal_rx_dma_dump_reg(P_MTK_DMA_INFO_STR p_dma_info,
ENUM_BTIF_REG_ID flag)
{
int i_ret = -1;
unsigned int base = p_dma_info->base;
unsigned int int_flag = 0;
unsigned int enable = 0;
unsigned int stop = 0;
unsigned int flush = 0;
unsigned int wpt = 0;
unsigned int rpt = 0;
unsigned int int_buf = 0;
unsigned int valid_size = 0;
/*unsigned long irq_flag = 0;*/
/*spin_lock_irqsave(&(g_clk_cg_spinlock), irq_flag);*/
if (0 == clock_is_on(MTK_BTIF_APDMA_CLK_CG)) {
/*spin_unlock_irqrestore(&(g_clk_cg_spinlock), irq_flag);*/
BTIF_ERR_FUNC("%s: clock is off, this should never happen!!!\n",
__FILE__);
return i_ret;
}
int_flag = BTIF_READ32(RX_DMA_INT_FLAG(base));
enable = BTIF_READ32(RX_DMA_EN(base));
stop = BTIF_READ32(RX_DMA_STOP(base));
flush = BTIF_READ32(RX_DMA_FLUSH(base));
wpt = BTIF_READ32(RX_DMA_VFF_WPT(base));
rpt = BTIF_READ32(RX_DMA_VFF_RPT(base));
int_buf = BTIF_READ32(RX_DMA_INT_BUF_SIZE(base));
valid_size = BTIF_READ32(RX_DMA_VFF_VALID_SIZE(base));
/*spin_unlock_irqrestore(&(g_clk_cg_spinlock), irq_flag);*/
BTIF_INFO_FUNC("DMA's clock is on\n");
BTIF_INFO_FUNC("Rx DMA's base address: 0x%x\n", base);
if (REG_RX_DMA_ALL == flag) {
BTIF_INFO_FUNC("RX_EN(:0x%x\n", enable);
BTIF_INFO_FUNC("RX_STOP:0x%x\n", stop);
BTIF_INFO_FUNC("RX_FLUSH:0x%x\n", flush);
BTIF_INFO_FUNC("INT_FLAG:0x%x\n", int_flag);
BTIF_INFO_FUNC("RX_WPT:0x%x\n", wpt);
BTIF_INFO_FUNC("RX_RPT:0x%x\n", rpt);
BTIF_INFO_FUNC("INT_BUF_SIZE:0x%x\n", int_buf);
BTIF_INFO_FUNC("VALID_SIZE:0x%x\n", valid_size);
BTIF_INFO_FUNC("INT_EN:0x%x\n",
BTIF_READ32(RX_DMA_INT_EN(base)));
BTIF_INFO_FUNC("RX_RST:0x%x\n", BTIF_READ32(RX_DMA_RST(base)));
BTIF_INFO_FUNC("VFF_ADDR:0x%x\n",
BTIF_READ32(RX_DMA_VFF_ADDR(base)));
BTIF_INFO_FUNC("VFF_LEN:0x%x\n",
BTIF_READ32(RX_DMA_VFF_LEN(base)));
BTIF_INFO_FUNC("RX_THRE:0x%x\n",
BTIF_READ32(RX_DMA_VFF_THRE(base)));
BTIF_INFO_FUNC("RX_FLOW_CTRL_THRE:0x%x\n",
BTIF_READ32(RX_DMA_FLOW_CTRL_THRE(base)));
BTIF_INFO_FUNC("LEFT_SIZE:0x%x\n",
BTIF_READ32(RX_DMA_VFF_LEFT_SIZE(base)));
BTIF_INFO_FUNC("DBG_STATUS:0x%x\n",
BTIF_READ32(RX_DMA_DEBUG_STATUS(base)));
i_ret = 0;
} else {
BTIF_WARN_FUNC("unknown flag:%d\n", flag);
}
BTIF_INFO_FUNC("rx dma %s\n", (enable & DMA_EN_BIT) &&
(!(stop && DMA_STOP_BIT)) ? "enabled" : "stoped");
BTIF_INFO_FUNC("data in rx dma is %s by driver\n",
((wpt == rpt) &&
(int_buf == 0)) ? "received" : "not received");
return i_ret;
}