173 lines
6.1 KiB
C
173 lines
6.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2010 - Maxim Levitsky
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* driver for Ricoh memstick readers
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*/
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#ifndef R592_H
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#include <linux/memstick.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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#include <linux/kfifo.h>
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#include <linux/ctype.h>
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/* write to this reg (number,len) triggers TPC execution */
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#define R592_TPC_EXEC 0x00
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#define R592_TPC_EXEC_LEN_SHIFT 16 /* Bits 16..25 are TPC len */
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#define R592_TPC_EXEC_BIG_FIFO (1 << 26) /* If bit 26 is set, large fifo is used (reg 48) */
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#define R592_TPC_EXEC_TPC_SHIFT 28 /* Bits 28..31 are the TPC number */
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/* Window for small TPC fifo (big endian)*/
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/* reads and writes always are done in 8 byte chunks */
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/* Not used in driver, because large fifo does better job */
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#define R592_SFIFO 0x08
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/* Status register (ms int, small fifo, IO)*/
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#define R592_STATUS 0x10
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/* Parallel INT bits */
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#define R592_STATUS_P_CMDNACK (1 << 16) /* INT reg: NACK (parallel mode) */
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#define R592_STATUS_P_BREQ (1 << 17) /* INT reg: card ready (parallel mode)*/
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#define R592_STATUS_P_INTERR (1 << 18) /* INT reg: int error (parallel mode)*/
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#define R592_STATUS_P_CED (1 << 19) /* INT reg: command done (parallel mode) */
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/* Fifo status */
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#define R592_STATUS_SFIFO_FULL (1 << 20) /* Small Fifo almost full (last chunk is written) */
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#define R592_STATUS_SFIFO_EMPTY (1 << 21) /* Small Fifo empty */
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/* Error detection via CRC */
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#define R592_STATUS_SEND_ERR (1 << 24) /* Send failed */
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#define R592_STATUS_RECV_ERR (1 << 25) /* Receive failed */
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/* Card state */
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#define R592_STATUS_RDY (1 << 28) /* RDY signal received */
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#define R592_STATUS_CED (1 << 29) /* INT: Command done (serial mode)*/
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#define R592_STATUS_SFIFO_INPUT (1 << 30) /* Small fifo received data*/
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#define R592_SFIFO_SIZE 32 /* total size of small fifo is 32 bytes */
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#define R592_SFIFO_PACKET 8 /* packet size of small fifo */
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/* IO control */
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#define R592_IO 0x18
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#define R592_IO_16 (1 << 16) /* Set by default, can be cleared */
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#define R592_IO_18 (1 << 18) /* Set by default, can be cleared */
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#define R592_IO_SERIAL1 (1 << 20) /* Set by default, can be cleared, (cleared on parallel) */
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#define R592_IO_22 (1 << 22) /* Set by default, can be cleared */
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#define R592_IO_DIRECTION (1 << 24) /* TPC direction (1 write 0 read) */
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#define R592_IO_26 (1 << 26) /* Set by default, can be cleared */
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#define R592_IO_SERIAL2 (1 << 30) /* Set by default, can be cleared (cleared on parallel), serial doesn't work if unset */
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#define R592_IO_RESET (1 << 31) /* Reset, sets defaults*/
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/* Turns hardware on/off */
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#define R592_POWER 0x20 /* bits 0-7 writeable */
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#define R592_POWER_0 (1 << 0) /* set on start, cleared on stop - must be set*/
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#define R592_POWER_1 (1 << 1) /* set on start, cleared on stop - must be set*/
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#define R592_POWER_3 (1 << 3) /* must be clear */
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#define R592_POWER_20 (1 << 5) /* set before switch to parallel */
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/* IO mode*/
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#define R592_IO_MODE 0x24
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#define R592_IO_MODE_SERIAL 1
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#define R592_IO_MODE_PARALLEL 3
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/* IRQ,card detection,large fifo (first word irq status, second enable) */
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/* IRQs are ACKed by clearing the bits */
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#define R592_REG_MSC 0x28
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#define R592_REG_MSC_PRSNT (1 << 1) /* card present (only status)*/
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#define R592_REG_MSC_IRQ_INSERT (1 << 8) /* detect insert / card insered */
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#define R592_REG_MSC_IRQ_REMOVE (1 << 9) /* detect removal / card removed */
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#define R592_REG_MSC_FIFO_EMPTY (1 << 10) /* fifo is empty */
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#define R592_REG_MSC_FIFO_DMA_DONE (1 << 11) /* dma enable / dma done */
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#define R592_REG_MSC_FIFO_USER_ORN (1 << 12) /* set if software reads empty fifo (if R592_REG_MSC_FIFO_EMPTY is set) */
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#define R592_REG_MSC_FIFO_MISMATH (1 << 13) /* set if amount of data in fifo doesn't match amount in TPC */
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#define R592_REG_MSC_FIFO_DMA_ERR (1 << 14) /* IO failure */
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#define R592_REG_MSC_LED (1 << 15) /* clear to turn led off (only status)*/
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#define DMA_IRQ_ACK_MASK \
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(R592_REG_MSC_FIFO_DMA_DONE | R592_REG_MSC_FIFO_DMA_ERR)
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#define DMA_IRQ_EN_MASK (DMA_IRQ_ACK_MASK << 16)
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#define IRQ_ALL_ACK_MASK 0x00007F00
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#define IRQ_ALL_EN_MASK (IRQ_ALL_ACK_MASK << 16)
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/* DMA address for large FIFO read/writes*/
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#define R592_FIFO_DMA 0x2C
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/* PIO access to large FIFO (512 bytes) (big endian)*/
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#define R592_FIFO_PIO 0x30
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#define R592_LFIFO_SIZE 512 /* large fifo size */
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/* large FIFO DMA settings */
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#define R592_FIFO_DMA_SETTINGS 0x34
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#define R592_FIFO_DMA_SETTINGS_EN (1 << 0) /* DMA enabled */
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#define R592_FIFO_DMA_SETTINGS_DIR (1 << 1) /* Dma direction (1 read, 0 write) */
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#define R592_FIFO_DMA_SETTINGS_CAP (1 << 24) /* Dma is aviable */
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/* Maybe just an delay */
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/* Bits 17..19 are just number */
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/* bit 16 is set, then bit 20 is waited */
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/* time to wait is about 50 spins * 2 ^ (bits 17..19) */
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/* seems to be possible just to ignore */
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/* Probably debug register */
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#define R592_REG38 0x38
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#define R592_REG38_CHANGE (1 << 16) /* Start bit */
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#define R592_REG38_DONE (1 << 20) /* HW set this after the delay */
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#define R592_REG38_SHIFT 17
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/* Debug register, written (0xABCDEF00) when error happens - not used*/
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#define R592_REG_3C 0x3C
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struct r592_device {
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struct pci_dev *pci_dev;
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struct memstick_host *host; /* host backpointer */
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struct memstick_request *req; /* current request */
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/* Registers, IRQ */
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void __iomem *mmio;
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int irq;
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spinlock_t irq_lock;
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spinlock_t io_thread_lock;
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struct timer_list detect_timer;
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struct task_struct *io_thread;
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bool parallel_mode;
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DECLARE_KFIFO(pio_fifo, u8, sizeof(u32));
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/* DMA area */
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int dma_capable;
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int dma_error;
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struct completion dma_done;
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void *dummy_dma_page;
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dma_addr_t dummy_dma_page_physical_address;
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};
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#define DRV_NAME "r592"
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#define message(format, ...) \
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printk(KERN_INFO DRV_NAME ": " format "\n", ## __VA_ARGS__)
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#define __dbg(level, format, ...) \
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do { \
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if (debug >= level) \
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printk(KERN_DEBUG DRV_NAME \
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": " format "\n", ## __VA_ARGS__); \
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} while (0)
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#define dbg(format, ...) __dbg(1, format, ## __VA_ARGS__)
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#define dbg_verbose(format, ...) __dbg(2, format, ## __VA_ARGS__)
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#define dbg_reg(format, ...) __dbg(3, format, ## __VA_ARGS__)
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#endif
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