1 /* 2 * bf6xx_sport - Analog Devices BF6XX SPORT driver 3 * 4 * Copyright (c) 2012 Analog Devices Inc. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 */ 19 20 #ifndef _BF6XX_SPORT_H_ 21 #define _BF6XX_SPORT_H_ 22 23 #include <linux/platform_device.h> 24 #include <asm/bfin_sport3.h> 25 26 struct sport_device { 27 struct platform_device *pdev; 28 const unsigned short *pin_req; 29 struct sport_register *tx_regs; 30 struct sport_register *rx_regs; 31 int tx_dma_chan; 32 int rx_dma_chan; 33 int tx_err_irq; 34 int rx_err_irq; 35 36 void (*tx_callback)(void *data); 37 void *tx_data; 38 void (*rx_callback)(void *data); 39 void *rx_data; 40 41 struct dmasg *tx_desc; 42 struct dmasg *rx_desc; 43 unsigned int tx_desc_size; 44 unsigned int rx_desc_size; 45 unsigned char *tx_buf; 46 unsigned char *rx_buf; 47 unsigned int tx_fragsize; 48 unsigned int rx_fragsize; 49 unsigned int tx_frags; 50 unsigned int rx_frags; 51 unsigned int wdsize; 52 }; 53 54 struct sport_params { 55 u32 spctl; 56 u32 div; 57 }; 58 59 struct sport_device *sport_create(struct platform_device *pdev); 60 void sport_delete(struct sport_device *sport); 61 int sport_set_tx_params(struct sport_device *sport, 62 struct sport_params *params); 63 int sport_set_rx_params(struct sport_device *sport, 64 struct sport_params *params); 65 void sport_tx_start(struct sport_device *sport); 66 void sport_rx_start(struct sport_device *sport); 67 void sport_tx_stop(struct sport_device *sport); 68 void sport_rx_stop(struct sport_device *sport); 69 void sport_set_tx_callback(struct sport_device *sport, 70 void (*tx_callback)(void *), void *tx_data); 71 void sport_set_rx_callback(struct sport_device *sport, 72 void (*rx_callback)(void *), void *rx_data); 73 int sport_config_tx_dma(struct sport_device *sport, void *buf, 74 int fragcount, size_t fragsize); 75 int sport_config_rx_dma(struct sport_device *sport, void *buf, 76 int fragcount, size_t fragsize); 77 unsigned long sport_curr_offset_tx(struct sport_device *sport); 78 unsigned long sport_curr_offset_rx(struct sport_device *sport); 79 80 81 82 #endif 83