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31 ******************************************************************************/
32 /*****************************************************************************/
37 * This file contains the implementation of the ethernet interface reset sequence
40 * MODIFICATION HISTORY:
42 * Ver Who Date Changes
43 * ----- ---- -------- -------------------------------------------------------
44 * 1.05a kpc 28/06/13 First release
45 * 3.00 kvn 02/13/15 Modified code for MISRA-C:2012 compliance.
48 ******************************************************************************/
50 /***************************** Include Files *********************************/
52 #include "xemacps_hw.h"
53 #include "xparameters.h"
55 /************************** Constant Definitions *****************************/
58 /**************************** Type Definitions *******************************/
61 /***************** Macros (Inline Functions) Definitions *********************/
64 /************************** Function Prototypes ******************************/
66 /*****************************************************************************/
68 * This function perform the reset sequence to the given emacps interface by
69 * configuring the appropriate control bits in the emacps specifc registers.
70 * the emacps reset squence involves the following steps
71 * Disable all the interuupts
72 * Clear the status registers
73 * Disable Rx and Tx engines
74 * Update the Tx and Rx descriptor queue registers with reset values
75 * Update the other relevant control registers with reset value
77 * @param BaseAddress of the interface
82 * This function will not modify the slcr registers that are relavant for
84 ******************************************************************************/
85 void XEmacPs_ResetHw(u32 BaseAddr)
89 /* Disable the interrupts */
90 XEmacPs_WriteReg(BaseAddr,XEMACPS_IDR_OFFSET,0x0U);
92 /* Stop transmission,disable loopback and Stop tx and Rx engines */
93 RegVal = XEmacPs_ReadReg(BaseAddr,XEMACPS_NWCTRL_OFFSET);
94 RegVal &= ~((u32)XEMACPS_NWCTRL_TXEN_MASK|
95 (u32)XEMACPS_NWCTRL_RXEN_MASK|
96 (u32)XEMACPS_NWCTRL_HALTTX_MASK|
97 (u32)XEMACPS_NWCTRL_LOOPEN_MASK);
98 /* Clear the statistic registers, flush the packets in DPRAM*/
99 RegVal |= (XEMACPS_NWCTRL_STATCLR_MASK|
100 XEMACPS_NWCTRL_FLUSH_DPRAM_MASK);
101 XEmacPs_WriteReg(BaseAddr,XEMACPS_NWCTRL_OFFSET,RegVal);
102 /* Clear the interrupt status */
103 XEmacPs_WriteReg(BaseAddr,XEMACPS_ISR_OFFSET,XEMACPS_IXR_ALL_MASK);
104 /* Clear the tx status */
105 XEmacPs_WriteReg(BaseAddr,XEMACPS_TXSR_OFFSET,(XEMACPS_TXSR_ERROR_MASK|
106 (u32)XEMACPS_TXSR_TXCOMPL_MASK|
107 (u32)XEMACPS_TXSR_TXGO_MASK));
108 /* Clear the rx status */
109 XEmacPs_WriteReg(BaseAddr,XEMACPS_RXSR_OFFSET,
110 XEMACPS_RXSR_FRAMERX_MASK);
111 /* Clear the tx base address */
112 XEmacPs_WriteReg(BaseAddr,XEMACPS_TXQBASE_OFFSET,0x0U);
113 /* Clear the rx base address */
114 XEmacPs_WriteReg(BaseAddr,XEMACPS_RXQBASE_OFFSET,0x0U);
115 /* Update the network config register with reset value */
116 XEmacPs_WriteReg(BaseAddr,XEMACPS_NWCFG_OFFSET,XEMACPS_NWCFG_RESET_MASK);
117 /* Update the hash address registers with reset value */
118 XEmacPs_WriteReg(BaseAddr,XEMACPS_HASHL_OFFSET,0x0U);
119 XEmacPs_WriteReg(BaseAddr,XEMACPS_HASHH_OFFSET,0x0U);