static int rockchip_spi_test_probe(struct spi_device *spi)
{
int ret;
int i =0;
char txbuf[256],rxbuf[256];
int id = 0;
static struct dw_spi_chip *spi_chip_data;
struct spi_test_data *spi_test_data;
if(!spi)
return -ENOMEM;
if (!spi_chip_data && spi->dev.of_node) {
spi_chip_data = rockchip_spi_parse_dt(&spi->dev);
if (IS_ERR(spi_chip_data))
return -ENOMEM;
}
spi_test_data = (struct spi_test_data *)kzalloc(sizeof(struct spi_test_data), GFP_KERNEL);
if(!spi_test_data){
dev_err(&spi->dev, "ERR: no memory for spi_test_data\n");
return -ENOMEM;
}
spi->bits_per_word = 8;
spi->controller_data = spi_chip_data;
spi_test_data->spi = spi;
spi_test_data->dev = &spi->dev;
ret = spi_setup(spi);
if (ret < 0){
dev_err(spi_test_data->dev, "ERR: fail to setup spi\n");
return -1;
}
if((spi->master->bus_num == 0) && (spi->chip_select == 0))
id = 0;
else if((spi->master->bus_num == 0) && (spi->chip_select == 1))
id = 1;
else if ((spi->master->bus_num == 1) && (spi->chip_select == 0))
id = 2;
else if ((spi->master->bus_num == 1) && (spi->chip_select == 1))
id = 3;
else if ((spi->master->bus_num == 2) && (spi->chip_select == 0))
id = 4;
else if ((spi->master->bus_num == 2) && (spi->chip_select == 1))
id = 5;
g_spi_test_data[id] = spi_test_data;
printk("%s:name=%s,bus_num=%d,cs=%d,mode=%d,speed=%d\n",__func__,spi->modalias, spi->master->bus_num, spi->chip_select, spi->mode, spi->max_speed_hz);
printk("%s:poll_mode=%d, type=%d, enable_dma=%d\n",__func__, spi_chip_data->poll_mode, spi_chip_data->type, spi_chip_data->enable_dma);
return ret;
}
static int rockchip_spi_probe(struct platform_device *pdev)
{
struct resource *mem_res;
struct rockchip_spi_driver_data *sdd;
struct rockchip_spi_info *info = pdev->dev.platform_data;
struct dw_spi *dws;
int ret, irq;
char clk_name[16];
if (!info && pdev->dev.of_node) {
info = rockchip_spi_parse_dt(&pdev->dev);
if (IS_ERR(info))
return PTR_ERR(info);
}
if (!info) {
dev_err(&pdev->dev, "platform_data missing!\n");
return -ENODEV;
}
sdd = kzalloc(sizeof(struct rockchip_spi_driver_data), GFP_KERNEL);
if (!sdd) {
ret = -ENOMEM;
goto err_kfree;
}
sdd->pdev = pdev;
sdd->info = info;
dws = &sdd->dws;
atomic_set(&dws->debug_flag, 0);//debug flag
/* Get basic io resource and map it */
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_warn(&pdev->dev, "Failed to get IRQ: %d\n", irq);
return irq;
}
mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (mem_res == NULL) {
dev_err(&pdev->dev, "Unable to get SPI MEM resource\n");
ret = -ENXIO;
goto err_unmap;
}
dws->regs = ioremap(mem_res->start, (mem_res->end - mem_res->start) + 1);
if (!dws->regs){
ret = -EBUSY;
goto err_unmap;
}
dws->paddr = mem_res->start;
dws->iolen = (mem_res->end - mem_res->start) + 1;
printk(KERN_INFO "dws->regs: %p\n", dws->regs);
//get bus num
if (pdev->dev.of_node) {
ret = of_alias_get_id(pdev->dev.of_node, "spi");
if (ret < 0) {
dev_err(&pdev->dev, "failed to get alias id, errno %d\n",
ret);
goto err_release_mem;
}
info->bus_num = ret;
} else {
info->bus_num = pdev->id;
}
/* Setup clocks */
sdd->clk_spi = devm_clk_get(&pdev->dev, "spi");
if (IS_ERR(sdd->clk_spi)) {
dev_err(&pdev->dev, "Unable to acquire clock 'spi'\n");
ret = PTR_ERR(sdd->clk_spi);
goto err_clk;
}
if (clk_prepare_enable(sdd->clk_spi)) {
dev_err(&pdev->dev, "Couldn't enable clock 'spi'\n");
ret = -EBUSY;
goto err_clk;
}
sprintf(clk_name, "pclk_spi%d", info->src_clk_nr);
sdd->pclk_spi = devm_clk_get(&pdev->dev, clk_name);
if (IS_ERR(sdd->pclk_spi)) {
dev_err(&pdev->dev,
"Unable to acquire clock '%s'\n", clk_name);
ret = PTR_ERR(sdd->pclk_spi);
goto err_pclk;
}
if (clk_prepare_enable(sdd->pclk_spi)) {
dev_err(&pdev->dev, "Couldn't enable clock '%s'\n", clk_name);
ret = -EBUSY;
goto err_pclk;
}
clk_set_rate(sdd->clk_spi, info->spi_freq);
dws->max_freq = clk_get_rate(sdd->clk_spi);
dws->parent_dev = &pdev->dev;
dws->bus_num = info->bus_num;
dws->num_cs = info->num_cs;
dws->irq = irq;
dws->clk_spi = sdd->clk_spi;
dws->pclk_spi = sdd->pclk_spi;
/*
* handling for rockchip paltforms, like dma setup,
* clock rate, FIFO depth.
*/
#ifdef CONFIG_SPI_ROCKCHIP_DMA
ret = dw_spi_dma_init(dws);
if (ret)
printk("%s:fail to init dma\n",__func__);
#endif
ret = dw_spi_add_host(dws);
if (ret)
goto err_release_mem;
platform_set_drvdata(pdev, sdd);
printk("%s:num_cs=%d,irq=%d,freq=%d ok\n",__func__, info->num_cs, irq, dws->max_freq);
return 0;
err_release_mem:
release_mem_region(mem_res->start, (mem_res->end - mem_res->start) + 1);
err_pclk:
clk_disable_unprepare(sdd->pclk_spi);
err_clk:
clk_disable_unprepare(sdd->clk_spi);
err_unmap:
iounmap(dws->regs);
err_kfree:
kfree(sdd);
return ret;
}
