1 /* 2 * axi lite register access driver 3 * Xianjun jiao. [email protected]; [email protected] 4 */ 5 6 #include <linux/bitops.h> 7 #include <linux/dmapool.h> 8 #include <linux/dma/xilinx_dma.h> 9 #include <linux/init.h> 10 #include <linux/interrupt.h> 11 #include <linux/io.h> 12 #include <linux/iopoll.h> 13 #include <linux/module.h> 14 #include <linux/of_address.h> 15 #include <linux/of_dma.h> 16 #include <linux/of_platform.h> 17 #include <linux/of_irq.h> 18 #include <linux/slab.h> 19 #include <linux/clk.h> 20 #include <linux/io-64-nonatomic-lo-hi.h> 21 #include <linux/delay.h> 22 23 #include "../hw_def.h" 24 25 static void __iomem *base_addr; // to store driver specific base address needed for mmu to translate virtual address to physical address in our FPGA design 26 27 /* IO accessors */ 28 static inline u32 reg_read(u32 reg) 29 { 30 return ioread32(base_addr + reg); 31 } 32 33 static inline void reg_write(u32 reg, u32 value) 34 { 35 iowrite32(value, base_addr + reg); 36 } 37 38 static inline void OPENOFDM_TX_REG_MULTI_RST_write(u32 Data) { 39 reg_write(OPENOFDM_TX_REG_MULTI_RST_ADDR, Data); 40 } 41 42 static inline void OPENOFDM_TX_REG_INIT_PILOT_STATE_write(u32 Data) { 43 reg_write(OPENOFDM_TX_REG_INIT_PILOT_STATE_ADDR, Data); 44 } 45 46 static inline void OPENOFDM_TX_REG_INIT_DATA_STATE_write(u32 Data) { 47 reg_write(OPENOFDM_TX_REG_INIT_DATA_STATE_ADDR, Data); 48 } 49 50 static const struct of_device_id dev_of_ids[] = { 51 { .compatible = "sdr,openofdm_tx", }, 52 {} 53 }; 54 MODULE_DEVICE_TABLE(of, dev_of_ids); 55 56 static struct openofdm_tx_driver_api openofdm_tx_driver_api_inst; 57 static struct openofdm_tx_driver_api *openofdm_tx_api = &openofdm_tx_driver_api_inst; 58 EXPORT_SYMBOL(openofdm_tx_api); 59 60 static inline u32 hw_init(enum openofdm_tx_mode mode){ 61 int err=0, i; 62 63 printk("%s hw_init mode %d\n", openofdm_tx_compatible_str, mode); 64 65 switch(mode) 66 { 67 case OPENOFDM_TX_TEST: 68 printk("%s hw_init mode OPENOFDM_TX_TEST\n", openofdm_tx_compatible_str); 69 break; 70 71 case OPENOFDM_TX_NORMAL: 72 printk("%s hw_init mode OPENOFDM_TX_NORMAL\n", openofdm_tx_compatible_str); 73 break; 74 75 default: 76 printk("%s hw_init mode %d is wrong!\n", openofdm_tx_compatible_str, mode); 77 err=1; 78 } 79 80 //rst 81 for (i=0;i<8;i++) 82 openofdm_tx_api->OPENOFDM_TX_REG_MULTI_RST_write(0); 83 for (i=0;i<32;i++) 84 openofdm_tx_api->OPENOFDM_TX_REG_MULTI_RST_write(0xFFFFFFFF); 85 for (i=0;i<8;i++) 86 openofdm_tx_api->OPENOFDM_TX_REG_MULTI_RST_write(0); 87 88 openofdm_tx_api->OPENOFDM_TX_REG_INIT_PILOT_STATE_write(0x7F); 89 openofdm_tx_api->OPENOFDM_TX_REG_INIT_DATA_STATE_write(0x7F); 90 91 printk("%s hw_init err %d\n", openofdm_tx_compatible_str, err); 92 return(err); 93 } 94 95 static int dev_probe(struct platform_device *pdev) 96 { 97 struct device_node *np = pdev->dev.of_node; 98 struct resource *io; 99 int err=1; 100 101 printk("\n"); 102 103 if (np) { 104 const struct of_device_id *match; 105 106 match = of_match_node(dev_of_ids, np); 107 if (match) { 108 printk("%s dev_probe match!\n", openofdm_tx_compatible_str); 109 err = 0; 110 } 111 } 112 113 if (err) 114 return err; 115 116 openofdm_tx_api->hw_init=hw_init; 117 118 openofdm_tx_api->reg_read=reg_read; 119 openofdm_tx_api->reg_write=reg_write; 120 121 openofdm_tx_api->OPENOFDM_TX_REG_MULTI_RST_write=OPENOFDM_TX_REG_MULTI_RST_write; 122 openofdm_tx_api->OPENOFDM_TX_REG_INIT_PILOT_STATE_write=OPENOFDM_TX_REG_INIT_PILOT_STATE_write; 123 openofdm_tx_api->OPENOFDM_TX_REG_INIT_DATA_STATE_write=OPENOFDM_TX_REG_INIT_DATA_STATE_write; 124 125 /* Request and map I/O memory */ 126 io = platform_get_resource(pdev, IORESOURCE_MEM, 0); 127 base_addr = devm_ioremap_resource(&pdev->dev, io); 128 if (IS_ERR(base_addr)) 129 return PTR_ERR(base_addr); 130 131 printk("%s dev_probe io start 0x%08x end 0x%08x name %s flags 0x%08x desc 0x%08x\n", openofdm_tx_compatible_str,io->start,io->end,io->name,(u32)io->flags,(u32)io->desc); 132 printk("%s dev_probe base_addr 0x%08x\n", openofdm_tx_compatible_str,(u32)base_addr); 133 printk("%s dev_probe openofdm_tx_driver_api_inst 0x%08x\n", openofdm_tx_compatible_str, (u32)&openofdm_tx_driver_api_inst); 134 printk("%s dev_probe openofdm_tx_api 0x%08x\n", openofdm_tx_compatible_str, (u32)openofdm_tx_api); 135 136 printk("%s dev_probe succeed!\n", openofdm_tx_compatible_str); 137 138 err = hw_init(OPENOFDM_TX_NORMAL); 139 140 return err; 141 } 142 143 static int dev_remove(struct platform_device *pdev) 144 { 145 printk("\n"); 146 147 printk("%s dev_remove base_addr 0x%08x\n", openofdm_tx_compatible_str,(u32)base_addr); 148 printk("%s dev_remove openofdm_tx_driver_api_inst 0x%08x\n", openofdm_tx_compatible_str, (u32)&openofdm_tx_driver_api_inst); 149 printk("%s dev_remove openofdm_tx_api 0x%08x\n", openofdm_tx_compatible_str, (u32)openofdm_tx_api); 150 151 printk("%s dev_remove succeed!\n", openofdm_tx_compatible_str); 152 return 0; 153 } 154 155 static struct platform_driver dev_driver = { 156 .driver = { 157 .name = "sdr,openofdm_tx", 158 .owner = THIS_MODULE, 159 .of_match_table = dev_of_ids, 160 }, 161 .probe = dev_probe, 162 .remove = dev_remove, 163 }; 164 165 module_platform_driver(dev_driver); 166 167 MODULE_AUTHOR("Xianjun Jiao"); 168 MODULE_DESCRIPTION("sdr,openofdm_tx"); 169 MODULE_LICENSE("GPL v2"); 170