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32 /*****************************************************************************/
36 * @addtogroup emacps_v3_1
39 * This file contains the implementation of the ethernet interface reset sequence
42 * MODIFICATION HISTORY:
44 * Ver Who Date Changes
45 * ----- ---- -------- -------------------------------------------------------
46 * 1.05a kpc 28/06/13 First release
47 * 3.00 kvn 02/13/15 Modified code for MISRA-C:2012 compliance.
50 ******************************************************************************/
52 /***************************** Include Files *********************************/
54 #include "xemacps_hw.h"
55 #include "xparameters.h"
57 /************************** Constant Definitions *****************************/
60 /**************************** Type Definitions *******************************/
63 /***************** Macros (Inline Functions) Definitions *********************/
66 /************************** Function Prototypes ******************************/
68 /*****************************************************************************/
70 * This function perform the reset sequence to the given emacps interface by
71 * configuring the appropriate control bits in the emacps specifc registers.
72 * the emacps reset squence involves the following steps
73 * Disable all the interuupts
74 * Clear the status registers
75 * Disable Rx and Tx engines
76 * Update the Tx and Rx descriptor queue registers with reset values
77 * Update the other relevant control registers with reset value
79 * @param BaseAddress of the interface
84 * This function will not modify the slcr registers that are relavant for
86 ******************************************************************************/
87 void XEmacPs_ResetHw(u32 BaseAddr)
91 /* Disable the interrupts */
92 XEmacPs_WriteReg(BaseAddr,XEMACPS_IDR_OFFSET,0x0U);
94 /* Stop transmission,disable loopback and Stop tx and Rx engines */
95 RegVal = XEmacPs_ReadReg(BaseAddr,XEMACPS_NWCTRL_OFFSET);
96 RegVal &= ~((u32)XEMACPS_NWCTRL_TXEN_MASK|
97 (u32)XEMACPS_NWCTRL_RXEN_MASK|
98 (u32)XEMACPS_NWCTRL_HALTTX_MASK|
99 (u32)XEMACPS_NWCTRL_LOOPEN_MASK);
100 /* Clear the statistic registers, flush the packets in DPRAM*/
101 RegVal |= (XEMACPS_NWCTRL_STATCLR_MASK|
102 XEMACPS_NWCTRL_FLUSH_DPRAM_MASK);
103 XEmacPs_WriteReg(BaseAddr,XEMACPS_NWCTRL_OFFSET,RegVal);
104 /* Clear the interrupt status */
105 XEmacPs_WriteReg(BaseAddr,XEMACPS_ISR_OFFSET,XEMACPS_IXR_ALL_MASK);
106 /* Clear the tx status */
107 XEmacPs_WriteReg(BaseAddr,XEMACPS_TXSR_OFFSET,(XEMACPS_TXSR_ERROR_MASK|
108 (u32)XEMACPS_TXSR_TXCOMPL_MASK|
109 (u32)XEMACPS_TXSR_TXGO_MASK));
110 /* Clear the rx status */
111 XEmacPs_WriteReg(BaseAddr,XEMACPS_RXSR_OFFSET,
112 XEMACPS_RXSR_FRAMERX_MASK);
113 /* Clear the tx base address */
114 XEmacPs_WriteReg(BaseAddr,XEMACPS_TXQBASE_OFFSET,0x0U);
115 /* Clear the rx base address */
116 XEmacPs_WriteReg(BaseAddr,XEMACPS_RXQBASE_OFFSET,0x0U);
117 /* Update the network config register with reset value */
118 XEmacPs_WriteReg(BaseAddr,XEMACPS_NWCFG_OFFSET,XEMACPS_NWCFG_RESET_MASK);
119 /* Update the hash address registers with reset value */
120 XEmacPs_WriteReg(BaseAddr,XEMACPS_HASHL_OFFSET,0x0U);
121 XEmacPs_WriteReg(BaseAddr,XEMACPS_HASHH_OFFSET,0x0U);