1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Altera TSE SGDMA and MSGDMA Linux driver
12 /* No initialization work to do for MSGDMA */
30 	/* Reset Rx mSGDMA */  in msgdma_reset()
31 	csrwr32(MSGDMA_CSR_STAT_MASK, priv->rx_dma_csr,  in msgdma_reset()
33 	csrwr32(MSGDMA_CSR_CTL_RESET, priv->rx_dma_csr,  in msgdma_reset()
38 		if (tse_bit_is_clear(priv->rx_dma_csr, msgdma_csroffs(status),  in msgdma_reset()
41 		udelay(1);  in msgdma_reset()
45 		netif_warn(priv, drv, priv->dev,  in msgdma_reset()
46 			   "TSE Rx mSGDMA resetting bit never cleared!\n");  in msgdma_reset()
49 	csrwr32(MSGDMA_CSR_STAT_MASK, priv->rx_dma_csr, msgdma_csroffs(status));  in msgdma_reset()
51 	/* Reset Tx mSGDMA */  in msgdma_reset()
52 	csrwr32(MSGDMA_CSR_STAT_MASK, priv->tx_dma_csr,  in msgdma_reset()
55 	csrwr32(MSGDMA_CSR_CTL_RESET, priv->tx_dma_csr,  in msgdma_reset()
60 		if (tse_bit_is_clear(priv->tx_dma_csr, msgdma_csroffs(status),  in msgdma_reset()
63 		udelay(1);  in msgdma_reset()
67 		netif_warn(priv, drv, priv->dev,  in msgdma_reset()
68 			   "TSE Tx mSGDMA resetting bit never cleared!\n");  in msgdma_reset()
71 	csrwr32(MSGDMA_CSR_STAT_MASK, priv->tx_dma_csr, msgdma_csroffs(status));  in msgdma_reset()
76 	tse_clear_bit(priv->rx_dma_csr, msgdma_csroffs(control),  in msgdma_disable_rxirq()
82 	tse_set_bit(priv->rx_dma_csr, msgdma_csroffs(control),  in msgdma_enable_rxirq()
88 	tse_clear_bit(priv->tx_dma_csr, msgdma_csroffs(control),  in msgdma_disable_txirq()
94 	tse_set_bit(priv->tx_dma_csr, msgdma_csroffs(control),  in msgdma_enable_txirq()
100 	csrwr32(MSGDMA_CSR_STAT_IRQ, priv->rx_dma_csr, msgdma_csroffs(status));  in msgdma_clear_rxirq()
105 	csrwr32(MSGDMA_CSR_STAT_IRQ, priv->tx_dma_csr, msgdma_csroffs(status));  in msgdma_clear_txirq()
111 	csrwr32(lower_32_bits(buffer->dma_addr), priv->tx_dma_desc,  in msgdma_tx_buffer()
113 	csrwr32(upper_32_bits(buffer->dma_addr), priv->tx_dma_desc,  in msgdma_tx_buffer()
115 	csrwr32(0, priv->tx_dma_desc, msgdma_descroffs(write_addr_lo));  in msgdma_tx_buffer()
116 	csrwr32(0, priv->tx_dma_desc, msgdma_descroffs(write_addr_hi));  in msgdma_tx_buffer()
117 	csrwr32(buffer->len, priv->tx_dma_desc, msgdma_descroffs(len));  in msgdma_tx_buffer()
118 	csrwr32(0, priv->tx_dma_desc, msgdma_descroffs(burst_seq_num));  in msgdma_tx_buffer()
119 	csrwr32(MSGDMA_DESC_TX_STRIDE, priv->tx_dma_desc,  in msgdma_tx_buffer()
121 	csrwr32(MSGDMA_DESC_CTL_TX_SINGLE, priv->tx_dma_desc,  in msgdma_tx_buffer()
133 	inuse = csrrd32(priv->tx_dma_csr, msgdma_csroffs(rw_fill_level))  in msgdma_tx_completions()
138 			      priv->tx_prod - priv->tx_cons - inuse - 1, 0);  in msgdma_tx_completions()
141 		status = csrrd32(priv->tx_dma_csr, msgdma_csroffs(status));  in msgdma_tx_completions()
143 			ready = priv->tx_prod - priv->tx_cons - 1;  in msgdma_tx_completions()
145 			ready = priv->tx_prod - priv->tx_cons;  in msgdma_tx_completions()
150 /* Put buffer to the mSGDMA RX FIFO
155 	u32 len = priv->rx_dma_buf_sz;  in msgdma_add_rx_desc()
156 	dma_addr_t dma_addr = rxbuffer->dma_addr;  in msgdma_add_rx_desc()
164 	csrwr32(0, priv->rx_dma_desc, msgdma_descroffs(read_addr_lo));  in msgdma_add_rx_desc()
165 	csrwr32(0, priv->rx_dma_desc, msgdma_descroffs(read_addr_hi));  in msgdma_add_rx_desc()
166 	csrwr32(lower_32_bits(dma_addr), priv->rx_dma_desc,  in msgdma_add_rx_desc()
168 	csrwr32(upper_32_bits(dma_addr), priv->rx_dma_desc,  in msgdma_add_rx_desc()
170 	csrwr32(len, priv->rx_dma_desc, msgdma_descroffs(len));  in msgdma_add_rx_desc()
171 	csrwr32(0, priv->rx_dma_desc, msgdma_descroffs(burst_seq_num));  in msgdma_add_rx_desc()
172 	csrwr32(0x00010001, priv->rx_dma_desc, msgdma_descroffs(stride));  in msgdma_add_rx_desc()
173 	csrwr32(control, priv->rx_dma_desc, msgdma_descroffs(control));  in msgdma_add_rx_desc()
185 	if (csrrd32(priv->rx_dma_csr, msgdma_csroffs(resp_fill_level))  in msgdma_rx_status()
187 		pktlength = csrrd32(priv->rx_dma_resp,  in msgdma_rx_status()
189 		pktstatus = csrrd32(priv->rx_dma_resp,  in msgdma_rx_status()