[ARM] msm: dma support for MSM7X00A

obj-y += io.o idle.o irq.o timer.o

obj-y += io.o idle.o irq.o timer.o dma.o

# Common code for board init

# Common code for board init

obj-y += common.o

obj-y += common.o

/* linux/arch/arm/mach-msm/dma.c

 *

 * Copyright (C) 2007 Google, Inc.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */

#include <asm/io.h>

#include <linux/interrupt.h>

#include <asm/arch/dma.h>

#define MSM_DMOV_CHANNEL_COUNT 16

enum {

	MSM_DMOV_PRINT_ERRORS = 1,

	MSM_DMOV_PRINT_IO = 2,

	MSM_DMOV_PRINT_FLOW = 4

};

static DEFINE_SPINLOCK(msm_dmov_lock);

static struct msm_dmov_cmd active_command;

static struct list_head ready_commands[MSM_DMOV_CHANNEL_COUNT];

static struct list_head active_commands[MSM_DMOV_CHANNEL_COUNT];

unsigned int msm_dmov_print_mask = MSM_DMOV_PRINT_ERRORS;

#define MSM_DMOV_DPRINTF(mask, format, args...) \

	do { \

		if ((mask) & msm_dmov_print_mask) \

			printk(KERN_ERR format, args); \

	} while (0)

#define PRINT_ERROR(format, args...) \

	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_ERRORS, format, args);

#define PRINT_IO(format, args...) \

	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_IO, format, args);

#define PRINT_FLOW(format, args...) \

	MSM_DMOV_DPRINTF(MSM_DMOV_PRINT_FLOW, format, args);

void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd)

{

	unsigned long irq_flags;

	unsigned int status;

	spin_lock_irqsave(&msm_dmov_lock, irq_flags);

	status = readl(DMOV_STATUS(id));

	if (list_empty(&ready_commands[id]) &&

		(status & DMOV_STATUS_CMD_PTR_RDY)) {

#if 0

		if (list_empty(&active_commands[id])) {

			PRINT_FLOW("msm_dmov_enqueue_cmd(%d), enable interrupt\n", id);

			writel(DMOV_CONFIG_IRQ_EN, DMOV_CONFIG(id));

		}

#endif

		PRINT_IO("msm_dmov_enqueue_cmd(%d), start command, status %x\n", id, status);

		list_add_tail(&cmd->list, &active_commands[id]);

		writel(cmd->cmdptr, DMOV_CMD_PTR(id));

	} else {

		if (list_empty(&active_commands[id]))

			PRINT_ERROR("msm_dmov_enqueue_cmd(%d), error datamover stalled, status %x\n", id, status);

		PRINT_IO("msm_dmov_enqueue_cmd(%d), enqueue command, status %x\n", id, status);

		list_add_tail(&cmd->list, &ready_commands[id]);

	}

	spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);

}

struct msm_dmov_exec_cmdptr_cmd {

	struct msm_dmov_cmd dmov_cmd;

	struct completion complete;

	unsigned id;

	unsigned int result;

	unsigned int flush[6];

};

static void dmov_exec_cmdptr_complete_func(struct msm_dmov_cmd *_cmd, unsigned int result)

{

	struct msm_dmov_exec_cmdptr_cmd *cmd = container_of(_cmd, struct msm_dmov_exec_cmdptr_cmd, dmov_cmd);

	cmd->result = result;

	if (result != 0x80000002) {

		cmd->flush[0] = readl(DMOV_FLUSH0(cmd->id));

		cmd->flush[1] = readl(DMOV_FLUSH1(cmd->id));

		cmd->flush[2] = readl(DMOV_FLUSH2(cmd->id));

		cmd->flush[3] = readl(DMOV_FLUSH3(cmd->id));

		cmd->flush[4] = readl(DMOV_FLUSH4(cmd->id));

		cmd->flush[5] = readl(DMOV_FLUSH5(cmd->id));

	}

	complete(&cmd->complete);

}

int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr)

{

	struct msm_dmov_exec_cmdptr_cmd cmd;

	PRINT_FLOW("dmov_exec_cmdptr(%d, %x)\n", id, cmdptr);

	cmd.dmov_cmd.cmdptr = cmdptr;

	cmd.dmov_cmd.complete_func = dmov_exec_cmdptr_complete_func;

	cmd.id = id;

	init_completion(&cmd.complete);

	msm_dmov_enqueue_cmd(id, &cmd.dmov_cmd);

	wait_for_completion(&cmd.complete);

	if (cmd.result != 0x80000002) {

		PRINT_ERROR("dmov_exec_cmdptr(%d): ERROR, result: %x\n", id, cmd.result);

		PRINT_ERROR("dmov_exec_cmdptr(%d):  flush: %x %x %x %x\n",

			id, cmd.flush[0], cmd.flush[1], cmd.flush[2], cmd.flush[3]);

		return -EIO;

	}

	PRINT_FLOW("dmov_exec_cmdptr(%d, %x) done\n", id, cmdptr);

	return 0;

}

static irqreturn_t msm_datamover_irq_handler(int irq, void *dev_id)

{

	unsigned int int_status, mask, id;

	unsigned long irq_flags;

	unsigned int ch_status;

	unsigned int ch_result;

	struct msm_dmov_cmd *cmd;

	spin_lock_irqsave(&msm_dmov_lock, irq_flags);

	int_status = readl(DMOV_ISR); /* read and clear interrupt */

	PRINT_FLOW("msm_datamover_irq_handler: DMOV_ISR %x\n", int_status);

	while (int_status) {

		mask = int_status & -int_status;

		id = fls(mask) - 1;

		PRINT_FLOW("msm_datamover_irq_handler %08x %08x id %d\n", int_status, mask, id);

		int_status &= ~mask;

		ch_status = readl(DMOV_STATUS(id));

		if (!(ch_status & DMOV_STATUS_RSLT_VALID)) {

			PRINT_FLOW("msm_datamover_irq_handler id %d, result not valid %x\n", id, ch_status);

			continue;

		}

		do {

			ch_result = readl(DMOV_RSLT(id));

			if (list_empty(&active_commands[id])) {

				PRINT_ERROR("msm_datamover_irq_handler id %d, got result "

					"with no active command, status %x, result %x\n",

					id, ch_status, ch_result);

				cmd = NULL;

			} else

				cmd = list_entry(active_commands[id].next, typeof(*cmd), list);

			PRINT_FLOW("msm_datamover_irq_handler id %d, status %x, result %x\n", id, ch_status, ch_result);

			if (ch_result & DMOV_RSLT_DONE) {

				PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n",

					id, ch_status);

				PRINT_IO("msm_datamover_irq_handler id %d, got result "

					"for %p, result %x\n", id, cmd, ch_result);

				if (cmd) {

					list_del(&cmd->list);

					cmd->complete_func(cmd, ch_result);

				}

			}

			if (ch_result & DMOV_RSLT_FLUSH) {

				unsigned int flush0 = readl(DMOV_FLUSH0(id));

				PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);

				PRINT_FLOW("msm_datamover_irq_handler id %d, flush, result %x, flush0 %x\n", id, ch_result, flush0);

				if (cmd) {

					list_del(&cmd->list);

					cmd->complete_func(cmd, ch_result);

				}

			}

			if (ch_result & DMOV_RSLT_ERROR) {

				unsigned int flush0 = readl(DMOV_FLUSH0(id));

				PRINT_ERROR("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);

				PRINT_ERROR("msm_datamover_irq_handler id %d, error, result %x, flush0 %x\n", id, ch_result, flush0);

				if (cmd) {

					list_del(&cmd->list);

					cmd->complete_func(cmd, ch_result);

				}

				/* this does not seem to work, once we get an error */

				/* the datamover will no longer accept commands */

				writel(0, DMOV_FLUSH0(id));

			}

			ch_status = readl(DMOV_STATUS(id));

			PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);

			if ((ch_status & DMOV_STATUS_CMD_PTR_RDY) && !list_empty(&ready_commands[id])) {

				cmd = list_entry(ready_commands[id].next, typeof(*cmd), list);

				list_del(&cmd->list);

				list_add_tail(&cmd->list, &active_commands[id]);

				PRINT_FLOW("msm_datamover_irq_handler id %d, start command\n", id);

				writel(cmd->cmdptr, DMOV_CMD_PTR(id));

			}

		} while (ch_status & DMOV_STATUS_RSLT_VALID);

		PRINT_FLOW("msm_datamover_irq_handler id %d, status %x\n", id, ch_status);

	}

	spin_unlock_irqrestore(&msm_dmov_lock, irq_flags);

	return IRQ_HANDLED;

}

static int __init msm_init_datamover(void)

{

	int i;

	for (i = 0; i < MSM_DMOV_CHANNEL_COUNT; i++) {

		INIT_LIST_HEAD(&ready_commands[i]);

		INIT_LIST_HEAD(&active_commands[i]);

		writel(DMOV_CONFIG_IRQ_EN | DMOV_CONFIG_FORCE_TOP_PTR_RSLT | DMOV_CONFIG_FORCE_FLUSH_RSLT, DMOV_CONFIG(i));

	}

	return request_irq(INT_ADM_AARM, msm_datamover_irq_handler, 0, "msmdatamover", NULL);

}

arch_initcall(msm_init_datamover);

/* linux/include/asm-arm/arch-msm/dma.h

 *

 * Copyright (C) 2007 Google, Inc.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */

#ifndef __ASM_ARCH_MSM_DMA_H

#include <linux/list.h>

#include <asm/arch/msm_iomap.h>

struct msm_dmov_cmd {

	struct list_head list;

	unsigned int cmdptr;

	void (*complete_func)(struct msm_dmov_cmd *cmd, unsigned int result);

/*	void (*user_result_func)(struct msm_dmov_cmd *cmd); */

};

void msm_dmov_enqueue_cmd(unsigned id, struct msm_dmov_cmd *cmd);

void msm_dmov_stop_cmd(unsigned id, struct msm_dmov_cmd *cmd);

int msm_dmov_exec_cmd(unsigned id, unsigned int cmdptr);

/* int msm_dmov_exec_cmd_etc(unsigned id, unsigned int cmdptr, int timeout, int interruptible); */

#define DMOV_SD0(off, ch) (MSM_DMOV_BASE + 0x0000 + (off) + ((ch) << 2))

#define DMOV_SD1(off, ch) (MSM_DMOV_BASE + 0x0400 + (off) + ((ch) << 2))

#define DMOV_SD2(off, ch) (MSM_DMOV_BASE + 0x0800 + (off) + ((ch) << 2))

#define DMOV_SD3(off, ch) (MSM_DMOV_BASE + 0x0C00 + (off) + ((ch) << 2))

/* only security domain 3 is available to the ARM11

 * SD0 -> mARM trusted, SD1 -> mARM nontrusted, SD2 -> aDSP, SD3 -> aARM

 */

#define DMOV_CMD_PTR(ch)      DMOV_SD3(0x000, ch)

#define DMOV_CMD_LIST         (0 << 29) /* does not work */

#define DMOV_CMD_PTR_LIST     (1 << 29) /* works */

#define DMOV_CMD_INPUT_CFG    (2 << 29) /* untested */

#define DMOV_CMD_OUTPUT_CFG   (3 << 29) /* untested */

#define DMOV_CMD_ADDR(addr)   ((addr) >> 3)

#define DMOV_RSLT(ch)         DMOV_SD3(0x040, ch)

#define DMOV_RSLT_VALID       (1 << 31) /* 0 == host has empties result fifo */

#define DMOV_RSLT_ERROR       (1 << 3)

#define DMOV_RSLT_FLUSH       (1 << 2)

#define DMOV_RSLT_DONE        (1 << 1)  /* top pointer done */

#define DMOV_RSLT_USER        (1 << 0)  /* command with FR force result */

#define DMOV_FLUSH0(ch)       DMOV_SD3(0x080, ch)

#define DMOV_FLUSH1(ch)       DMOV_SD3(0x0C0, ch)

#define DMOV_FLUSH2(ch)       DMOV_SD3(0x100, ch)

#define DMOV_FLUSH3(ch)       DMOV_SD3(0x140, ch)

#define DMOV_FLUSH4(ch)       DMOV_SD3(0x180, ch)

#define DMOV_FLUSH5(ch)       DMOV_SD3(0x1C0, ch)

#define DMOV_STATUS(ch)       DMOV_SD3(0x200, ch)

#define DMOV_STATUS_RSLT_COUNT(n)    (((n) >> 29))

#define DMOV_STATUS_CMD_COUNT(n)     (((n) >> 27) & 3)

#define DMOV_STATUS_RSLT_VALID       (1 << 1)

#define DMOV_STATUS_CMD_PTR_RDY      (1 << 0)

#define DMOV_ISR              DMOV_SD3(0x380, 0)

#define DMOV_CONFIG(ch)       DMOV_SD3(0x300, ch)

#define DMOV_CONFIG_FORCE_TOP_PTR_RSLT (1 << 2)

#define DMOV_CONFIG_FORCE_FLUSH_RSLT   (1 << 1)

#define DMOV_CONFIG_IRQ_EN             (1 << 0)

/* channel assignments */

#define DMOV_NAND_CHAN        7

#define DMOV_NAND_CRCI_CMD    5

#define DMOV_NAND_CRCI_DATA   4

#define DMOV_SDC1_CHAN        8

#define DMOV_SDC1_CRCI        6

#define DMOV_SDC2_CHAN        8

#define DMOV_SDC2_CRCI        7

#define DMOV_TSIF_CHAN        10

#define DMOV_TSIF_CRCI        10

#define DMOV_USB_CHAN         11

/* no client rate control ifc (eg, ram) */

#define DMOV_NONE_CRCI        0

/* If the CMD_PTR register has CMD_PTR_LIST selected, the data mover

 * is going to walk a list of 32bit pointers as described below.  Each

 * pointer points to a *array* of dmov_s, etc structs.  The last pointer

 * in the list is marked with CMD_PTR_LP.  The last struct in each array

 * is marked with CMD_LC (see below).

 */

#define CMD_PTR_ADDR(addr)  ((addr) >> 3)

#define CMD_PTR_LP          (1 << 31) /* last pointer */

#define CMD_PTR_PT          (3 << 29) /* ? */

/* Single Item Mode */

typedef struct {

	unsigned cmd;

	unsigned src;

	unsigned dst;

	unsigned len;

} dmov_s;

/* Scatter/Gather Mode */

typedef struct {

	unsigned cmd;

	unsigned src_dscr;

	unsigned dst_dscr;

	unsigned _reserved;

} dmov_sg;

/* bits for the cmd field of the above structures */

#define CMD_LC      (1 << 31)  /* last command */

#define CMD_FR      (1 << 22)  /* force result -- does not work? */

#define CMD_OCU     (1 << 21)  /* other channel unblock */

#define CMD_OCB     (1 << 20)  /* other channel block */

#define CMD_TCB     (1 << 19)  /* ? */

#define CMD_DAH     (1 << 18)  /* destination address hold -- does not work?*/

#define CMD_SAH     (1 << 17)  /* source address hold -- does not work? */

#define CMD_MODE_SINGLE     (0 << 0) /* dmov_s structure used */

#define CMD_MODE_SG         (1 << 0) /* untested */

#define CMD_MODE_IND_SG     (2 << 0) /* untested */

#define CMD_MODE_BOX        (3 << 0) /* untested */

#define CMD_DST_SWAP_BYTES  (1 << 14) /* exchange each byte n with byte n+1 */

#define CMD_DST_SWAP_SHORTS (1 << 15) /* exchange each short n with short n+1 */

#define CMD_DST_SWAP_WORDS  (1 << 16) /* exchange each word n with word n+1 */

#define CMD_SRC_SWAP_BYTES  (1 << 11) /* exchange each byte n with byte n+1 */

#define CMD_SRC_SWAP_SHORTS (1 << 12) /* exchange each short n with short n+1 */

#define CMD_SRC_SWAP_WORDS  (1 << 13) /* exchange each word n with word n+1 */

#define CMD_DST_CRCI(n)     (((n) & 15) << 7)

#define CMD_SRC_CRCI(n)     (((n) & 15) << 3)

#endif