1 files changed, 124 insertions, 0 deletions
diff --git a/drivers/char/modem_interface/modem_spi_drv.c b/drivers/char/modem_interface/modem_spi_drv.c
new file mode 100644
index 00000000..83573ed8
--- /dev/null
+++ b/drivers/char/modem_interface/modem_spi_drv.c
@@ -0,0 +1,124 @@
+/*
+ *  kernel/driver/char/modem_interface/modem_spi_drv.c
+ *
+ *  Generic modem interface spi API.
+ *
+ *  Author:     Jiayong Yang(Jiayong.Yang@spreadtrum.com)
+ *  Created:    Jul 27, 2012
+ *  Copyright:  Spreadtrum Inc.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/ioctl.h>
+#include <linux/fs.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/wait.h>
+#include <linux/sched.h>
+#include <linux/kthread.h>
+#include <linux/spi/spi.h>
+#include <linux/io.h>
+#include <linux/dma-mapping.h>
+#include <linux/version.h>
+#include <linux/proc_fs.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include "modem_buffer.h"
+#include "modem_interface_driver.h"
+
+extern struct spi_device *sprd_spi_modem_device_register(int master_bus_num,struct spi_board_info *chip);
+
+dma_addr_t spi2_rx_buf_dma_phys;
+dma_addr_t spi2_tx_buf_dma_phys;
+void *spi2_rx_buf_dma_virt;
+void *spi2_tx_buf_dma_virt;
+
+spinlock_t write_spinlock;
+#define SPI_WRITE_DEBUG
+#ifdef SPI_WRITE_DEBUG
+spinlock_t log_spinlock;
+#endif
+
+static struct spi_device *spi_g=NULL;
+
+static int modem_spi_open(void *para)
+{
+	return 0;
+}
+int modem_spi_read(char *buffer,int size)
+{
+	spi_read(spi_g,buffer,size);
+}
+int modem_spi_write(char *buffer,int size)
+{
+	unsigned short *data = buffer;
+	spi_write(spi_g,buffer,size);
+}
+
+static int mux2spi_probe(struct spi_device *spi)
+{
+	int status;
+
+	spi_g = spi;
+	spi_g->mode = SPI_MODE_1;
+	spi_g->max_speed_hz = 1000000;
+	spi_g->bits_per_word = 32;
+
+	spi2_rx_buf_dma_virt =dma_alloc_coherent(NULL, 4096,&spi2_rx_buf_dma_phys, GFP_KERNEL | GFP_DMA);
+
+	if (spi2_rx_buf_dma_virt == NULL){
+		printk(KERN_ERR "spi2_rx_buf_dma_virt alloc fail");
+		return (-ENOMEM);
+	}
+
+	spi2_tx_buf_dma_virt =dma_alloc_coherent(NULL, 4096,&spi2_tx_buf_dma_phys, GFP_KERNEL | GFP_DMA);
+
+	if (spi2_tx_buf_dma_virt == NULL){
+		printk(KERN_ERR "spi2_tx_buf_dma_virt alloc fail");
+		return (-ENOMEM);
+	}
+
+	spin_lock_init(&write_spinlock);
+#ifdef SPI_WRITE_DEBUG
+	spin_lock_init(&log_spinlock);
+#endif
+	status = spi_setup(spi_g);
+
+  ret:
+	return status;
+}
+
+static struct spi_driver mux_spi_drv = {
+	.driver = {
+		.name =         "spi_mux",
+		.bus =          &spi_bus_type,
+		.owner =        THIS_MODULE,
+	},
+	.probe =        mux2spi_probe,
+};
+
+
+static struct modem_device_operation	spi_device_op = {
+	.dev  = MODEM_DEV_SPI,
+	.open = modem_spi_open,
+	.read = modem_spi_read,
+	.write =modem_spi_write
+};
+struct modem_device_operation * modem_spi_drv_init(void)
+{
+	//sprd_spi_modem_device_register(0, NULL);
+	spi_g = NULL;
+	spi_register_driver(&mux_spi_drv);
+	return &spi_device_op;
+}