linux-imx

/*

 * Programmable Real-Time Unit Sub System (PRUSS) UIO driver (uio_pruss)

 *

 * This driver exports PRUSS host event out interrupts and PRUSS, L3 RAM,

 * and DDR RAM to user space for applications interacting with PRUSS firmware

 *

 * Copyright (C) 2010-11 Texas Instruments Incorporated - http://www.ti.com/

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License as

 * published by the Free Software Foundation version 2.

 *

 * This program is distributed "as is" WITHOUT ANY WARRANTY of any

 * kind, whether express or implied; without even the implied warranty

 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

#include <linux/device.h>

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/platform_device.h>

#include <linux/uio_driver.h>

#include <linux/platform_data/uio_pruss.h>

#include <linux/io.h>

#include <linux/clk.h>

#include <linux/dma-mapping.h>

#include <linux/sizes.h>

#include <linux/slab.h>

#include <linux/genalloc.h>

​

#define DRV_NAME "pruss_uio"

#define DRV_VERSION "1.0"

​

static int sram_pool_sz = SZ_16K;

module_param(sram_pool_sz, int, 0);

MODULE_PARM_DESC(sram_pool_sz, "sram pool size to allocate ");

​

static int extram_pool_sz = SZ_256K;

module_param(extram_pool_sz, int, 0);

MODULE_PARM_DESC(extram_pool_sz, "external ram pool size to allocate");

​

/*

 * Host event IRQ numbers from PRUSS - PRUSS can generate up to 8 interrupt

 * events to AINTC of ARM host processor - which can be used for IPC b/w PRUSS

 * firmware and user space application, async notification from PRU firmware

 * to user space application

 * 3    PRU_EVTOUT0

 * 4    PRU_EVTOUT1

 * 5    PRU_EVTOUT2

 * 6    PRU_EVTOUT3

 * 7    PRU_EVTOUT4

 * 8    PRU_EVTOUT5

 * 9    PRU_EVTOUT6

 * 10   PRU_EVTOUT7

*/

#define MAX_PRUSS_EVT   8

​

#define PINTC_HIDISR    0x0038

#define PINTC_HIPIR 0x0900

#define HIPIR_NOPEND    0x80000000

#define PINTC_HIER  0x1500

​

struct uio_pruss_dev {