path: root/drivers/memstick/host/jmb38x_ms.c

/*
 *  jmb38x_ms.c - JMicron jmb38x MemoryStick card reader
 *
 *  Copyright (C) 2008 Alex Dubov <oakad@yahoo.com>
 *
 * 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/spinlock.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/highmem.h>
#include <linux/memstick.h>
#include <linux/slab.h>
#include <linux/module.h>

#define DRIVER_NAME "jmb38x_ms"

static int no_dma;
module_param(no_dma, bool, 0644);

enum {
	DMA_ADDRESS       = 0x00,
	BLOCK             = 0x04,
	DMA_CONTROL       = 0x08,
	TPC_P0            = 0x0c,
	TPC_P1            = 0x10,
	TPC               = 0x14,
	HOST_CONTROL      = 0x18,
	DATA              = 0x1c,
	STATUS            = 0x20,
	INT_STATUS        = 0x24,
	INT_STATUS_ENABLE = 0x28,
	INT_SIGNAL_ENABLE = 0x2c,
	TIMER             = 0x30,
	TIMER_CONTROL     = 0x34,
	PAD_OUTPUT_ENABLE = 0x38,
	PAD_PU_PD         = 0x3c,
	CLOCK_DELAY       = 0x40,
	ADMA_ADDRESS      = 0x44,
	CLOCK_CONTROL     = 0x48,
	LED_CONTROL       = 0x4c,
	VERSION           = 0x50
};

struct jmb38x_ms_host {
	struct jmb38x_ms        *chip;
	void __iomem            *addr;
	spinlock_t              lock;
	struct tasklet_struct   notify;
	int                     id;
	char                    host_id[32];
	int                     irq;
	unsigned int            block_pos;
	unsigned long           timeout_jiffies;
	struct timer_list       timer;
	struct memstick_request *req;
	unsigned char           cmd_flags;
	unsigned char           io_pos;
	unsigned char           ifmode;
	unsigned int            io_word[2];
};

struct jmb38x_ms {
	struct pci_dev        *pdev;
	int                   host_cnt;
	struct memstick_host  *hosts[];
};

#define BLOCK_COUNT_MASK       0xffff0000
#define BLOCK_SIZE_MASK        0x00000fff

#define DMA_CONTROL_ENABLE     0x00000001

#define TPC_DATA_SEL           0x00008000
#define TPC_DIR                0x00004000
#define TPC_WAIT_INT           0x00002000
#define TPC_GET_INT            0x00000800
#define TPC_CODE_SZ_MASK       0x00000700
#define TPC_DATA_SZ_MASK       0x00000007

#define HOST_CONTROL_TDELAY_EN 0x00040000
#define HOST_CONTROL_HW_OC_P   0x00010000
#define HOST_CONTROL_RESET_REQ 0x00008000
#define HOST_CONTROL_REI       0x00004000
#define HOST_CONTROL_LED       0x00000400
#define HOST_CONTROL_FAST_CLK  0x00000200
#define HOST_CONTROL_RESET     0x00000100
#define HOST_CONTROL_POWER_EN  0x00000080
#define HOST_CONTROL_CLOCK_EN  0x00000040
#define HOST_CONTROL_REO       0x00000008
#define HOST_CONTROL_IF_SHIFT  4

#define HOST_CONTROL_IF_SERIAL 0x0
#define HOST_CONTROL_IF_PAR4   0x1
#define HOST_CONTROL_IF_PAR8   0x3

#define STATUS_BUSY             0x00080000
#define STATUS_MS_DAT7          0x00040000
#define STATUS_MS_DAT6          0x00020000
#define STATUS_MS_DAT5          0x00010000
#define STATUS_MS_DAT4          0x00008000
#define STATUS_MS_DAT3          0x00004000
#define STATUS_MS_DAT2          0x00002000
#define STATUS_MS_DAT1          0x00001000
#define STATUS_MS_DAT0          0x00000800
#define STATUS_HAS_MEDIA        0x00000400
#define STATUS_FIFO_EMPTY       0x00000200
#define STATUS_FIFO_FULL        0x00000100
#define STATUS_MS_CED           0x00000080
#define STATUS_MS_ERR           0x00000040
#define STATUS_MS_BRQ           0x00000020
#define STATUS_MS_CNK           0x00000001

#define INT_STATUS_TPC_ERR      0x00080000
#define INT_STATUS_CRC_ERR      0x00040000
#define INT_STATUS_TIMER_TO     0x00020000
#define INT_STATUS_HSK_TO       0x00010000
#define INT_STATUS_ANY_ERR      0x00008000
#define INT_STATUS_FIFO_WRDY    0x00000080
#define INT_STATUS_FIFO_RRDY    0x00000040
#define INT_STATUS_MEDIA_OUT    0x00000010
#define INT_STATUS_MEDIA_IN     0x00000008
#define INT_STATUS_DMA_BOUNDARY 0x00000004
#define INT_STATUS_EOTRAN       0x00000002
#define INT_STATUS_EOTPC        0x00000001

#define INT_STATUS_ALL          0x000f801f

#define PAD_OUTPUT_ENABLE_MS  0x0F3F

#define PAD_PU_PD_OFF         0x7FFF0000
#define PAD_PU_PD_ON_MS_SOCK0 0x5f8f0000
#define PAD_PU_PD_ON_MS_SOCK1 0x0f0f0000

#define CLOCK_CONTROL_BY_MMIO 0x00000008
#define CLOCK_CONTROL_40MHZ   0x00000001
#define CLOCK_CONTROL_50MHZ   0x00000002
#define CLOCK_CONTROL_60MHZ   0x00000010
#define CLOCK_CONTROL_62_5MHZ 0x00000004
#define CLOCK_CONTROL_OFF     0x00000000

#define PCI_CTL_CLOCK_DLY_ADDR   0x000000b0

enum {
	CMD_READY    = 0x01,
	FIFO_READY   = 0x02,
	REG_DATA     = 0x04,
	DMA_DATA     = 0x08
};

static unsigned int jmb38x_ms_read_data(struct jmb38x_ms_host *host,
					unsigned char *buf, unsigned int length)
{
	unsigned int off = 0;

	while (host->io_pos && length) {
		buf[off++] = host->io_word[0] & 0xff;
		host->io_word[0] >>= 8;
		length--;
		host->io_pos--;
	}

	if (!length)
		return off;

	while (!(STATUS_FIFO_EMPTY & readl(host->addr + STATUS))) {
		if (length < 4)
			break;
		*(unsigned int *)(buf + off) = __raw_readl(host->addr + DATA);
		length -= 4;
		off += 4;
	}

	if (length
	    && !(STATUS_FIFO_EMPTY & readl(host->addr + STATUS))) {
		host->io_word