1 /*drivers/spi/spi-rockchip-test.c -spi test driver
10 /* how to test spi
24 #include <linux/delay.h>
26 #include <linux/dma-mapping.h>
30 #include <linux/spi/spi.h>
36 #include <linux/platform_data/spi-rockchip.h>
45 	struct spi_device *spi;  member
57 	int ret = -1;  in spi_write_slt()
58 	struct spi_device *spi = NULL;  in spi_write_slt()  local
72 		spi = g_spi_test_data[id]->spi;  in spi_write_slt()
77 	ret = spi_sync(spi, &m);  in spi_write_slt()
86 	int ret = -1;  in spi_read_slt()
87 	struct spi_device *spi = NULL;  in spi_read_slt()  local
101 		spi = g_spi_test_data[id]->spi;  in spi_read_slt()
106 	ret = spi_sync(spi, &m);  in spi_read_slt()
116 	int ret = -1;  in spi_write_then_read_slt()
117 	struct spi_device *spi = NULL;  in spi_write_then_read_slt()  local
125 		spi = g_spi_test_data[id]->spi;  in spi_write_then_read_slt()
128 	ret = spi_write_then_read(spi, txbuf, n_tx, rxbuf, n_rx);  in spi_write_then_read_slt()
135 	int ret = -1;  in spi_write_and_read_slt()
136 	struct spi_device *spi = NULL;  in spi_write_and_read_slt()  local
150 		spi = g_spi_test_data[id]->spi;  in spi_write_and_read_slt()
155 	return spi_sync(spi, &m);  in spi_write_and_read_slt()
166 	unsigned long us = 0, bytes = 0;  in spi_test_write()  local
174 		return -EFAULT;  in spi_test_write()
189 	tmp[n - 1] = 0;  in spi_test_write()
193 		struct spi_device *spi = NULL;  in spi_test_write()  local
204 			spi = g_spi_test_data[id]->spi;  in spi_test_write()
206 		spi->max_speed_hz = val;  in spi_test_write()
214 			printk("spi write alloc buf size %d fail\n", size);  in spi_test_write()
226 		us = ktime_to_us(cost_time);  in spi_test_write()
229 		bytes = bytes * 1000 / us;  in spi_test_write()
230 		printk("spi write %d*%d cost %ldus speed:%ldKB/S\n", size, times, us, bytes);  in spi_test_write()
240 			printk("spi read alloc buf size %d fail\n", size);  in spi_test_write()
249 		us = ktime_to_us(cost_time);  in spi_test_write()
252 		bytes = bytes * 1000 / us;  in spi_test_write()
253 		printk("spi read %d*%d cost %ldus speed:%ldKB/S\n", size, times, us, bytes);  in spi_test_write()
254 		print_hex_dump(KERN_ERR, "SPI RX: ",  in spi_test_write()
270 			printk("spi tx alloc buf size %d fail\n", size);  in spi_test_write()
277 			printk("spi rx alloc buf size %d fail\n", size);  in spi_test_write()
288 				printk("spi loop test fail\n");  in spi_test_write()
295 		us = ktime_to_us(cost_time);  in spi_test_write()
298 		bytes = bytes * 1000 / us;  in spi_test_write()
299 		printk("spi loop %d*%d cost %ldus speed:%ldKB/S\n", size, times, us, bytes);  in spi_test_write()
335 static int rockchip_spi_test_probe(struct spi_device *spi)  in rockchip_spi_test_probe()  argument
341 	if (!spi)  in rockchip_spi_test_probe()
342 		return -ENOMEM;  in rockchip_spi_test_probe()
346 		dev_err(&spi->dev, "ERR: no memory for spi_test_data\n");  in rockchip_spi_test_probe()
347 		return -ENOMEM;  in rockchip_spi_test_probe()
349 	spi->bits_per_word = 8;  in rockchip_spi_test_probe()
351 	spi_test_data->spi = spi;  in rockchip_spi_test_probe()
352 	spi_test_data->dev = &spi->dev;  in rockchip_spi_test_probe()
354 	ret = spi_setup(spi);  in rockchip_spi_test_probe()
356 		dev_err(spi_test_data->dev, "ERR: fail to setup spi\n");  in rockchip_spi_test_probe()
357 		return -1;  in rockchip_spi_test_probe()
360 	if (device_property_read_u32(&spi->dev, "id", &id)) {  in rockchip_spi_test_probe()
361 		dev_warn(&spi->dev, "fail to get id, default set 0\n");  in rockchip_spi_test_probe()
367 …=%d,cs=%d,mode=%d,speed=%d\n", __func__, spi->modalias, spi->master->bus_num, spi->chip_select, sp…  in rockchip_spi_test_probe()
372 static int rockchip_spi_test_remove(struct spi_device *spi)  in rockchip_spi_test_remove()  argument
423 MODULE_AUTHOR("Luo Wei <lw@rock-chips.com>");
424 MODULE_AUTHOR("Huibin Hong <hhb@rock-chips.com>");
425 MODULE_DESCRIPTION("ROCKCHIP SPI TEST Driver");
427 MODULE_ALIAS("spi:spi_test");