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Maxim Levitsky92634122011-03-25 01:56:59 -07001/*
2 * Copyright (C) 2010 - Maxim Levitsky
3 * driver for Ricoh memstick readers
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9
10#ifndef R592_H
11
12#include <linux/memstick.h>
13#include <linux/spinlock.h>
14#include <linux/interrupt.h>
15#include <linux/workqueue.h>
16#include <linux/kfifo.h>
17#include <linux/ctype.h>
18
19/* write to this reg (number,len) triggers TPC execution */
20#define R592_TPC_EXEC 0x00
21#define R592_TPC_EXEC_LEN_SHIFT 16 /* Bits 16..25 are TPC len */
22#define R592_TPC_EXEC_BIG_FIFO (1 << 26) /* If bit 26 is set, large fifo is used (reg 48) */
23#define R592_TPC_EXEC_TPC_SHIFT 28 /* Bits 28..31 are the TPC number */
24
25
26/* Window for small TPC fifo (big endian)*/
27/* reads and writes always are done in 8 byte chunks */
28/* Not used in driver, because large fifo does better job */
29#define R592_SFIFO 0x08
30
31
32/* Status register (ms int, small fifo, IO)*/
33#define R592_STATUS 0x10
34 /* Parallel INT bits */
35#define R592_STATUS_P_CMDNACK (1 << 16) /* INT reg: NACK (parallel mode) */
36#define R592_STATUS_P_BREQ (1 << 17) /* INT reg: card ready (parallel mode)*/
37#define R592_STATUS_P_INTERR (1 << 18) /* INT reg: int error (parallel mode)*/
38#define R592_STATUS_P_CED (1 << 19) /* INT reg: command done (parallel mode) */
39
40 /* Fifo status */
41#define R592_STATUS_SFIFO_FULL (1 << 20) /* Small Fifo almost full (last chunk is written) */
42#define R592_STATUS_SFIFO_EMPTY (1 << 21) /* Small Fifo empty */
43
44 /* Error detection via CRC */
45#define R592_STATUS_SEND_ERR (1 << 24) /* Send failed */
Lucas De Marchi25985ed2011-03-30 22:57:33 -030046#define R592_STATUS_RECV_ERR (1 << 25) /* Receive failed */
Maxim Levitsky92634122011-03-25 01:56:59 -070047
48 /* Card state */
Lucas De Marchi25985ed2011-03-30 22:57:33 -030049#define R592_STATUS_RDY (1 << 28) /* RDY signal received */
Maxim Levitsky92634122011-03-25 01:56:59 -070050#define R592_STATUS_CED (1 << 29) /* INT: Command done (serial mode)*/
Lucas De Marchi25985ed2011-03-30 22:57:33 -030051#define R592_STATUS_SFIFO_INPUT (1 << 30) /* Small fifo received data*/
Maxim Levitsky92634122011-03-25 01:56:59 -070052
53#define R592_SFIFO_SIZE 32 /* total size of small fifo is 32 bytes */
54#define R592_SFIFO_PACKET 8 /* packet size of small fifo */
55
56/* IO control */
57#define R592_IO 0x18
58#define R592_IO_16 (1 << 16) /* Set by default, can be cleared */
59#define R592_IO_18 (1 << 18) /* Set by default, can be cleared */
60#define R592_IO_SERIAL1 (1 << 20) /* Set by default, can be cleared, (cleared on parallel) */
61#define R592_IO_22 (1 << 22) /* Set by default, can be cleared */
62#define R592_IO_DIRECTION (1 << 24) /* TPC direction (1 write 0 read) */
63#define R592_IO_26 (1 << 26) /* Set by default, can be cleared */
64#define R592_IO_SERIAL2 (1 << 30) /* Set by default, can be cleared (cleared on parallel), serial doesn't work if unset */
65#define R592_IO_RESET (1 << 31) /* Reset, sets defaults*/
66
67
68/* Turns hardware on/off */
69#define R592_POWER 0x20 /* bits 0-7 writeable */
70#define R592_POWER_0 (1 << 0) /* set on start, cleared on stop - must be set*/
71#define R592_POWER_1 (1 << 1) /* set on start, cleared on stop - must be set*/
72#define R592_POWER_3 (1 << 3) /* must be clear */
73#define R592_POWER_20 (1 << 5) /* set before switch to parallel */
74
75/* IO mode*/
76#define R592_IO_MODE 0x24
77#define R592_IO_MODE_SERIAL 1
78#define R592_IO_MODE_PARALLEL 3
79
80
81/* IRQ,card detection,large fifo (first word irq status, second enable) */
82/* IRQs are ACKed by clearing the bits */
83#define R592_REG_MSC 0x28
84#define R592_REG_MSC_PRSNT (1 << 1) /* card present (only status)*/
85#define R592_REG_MSC_IRQ_INSERT (1 << 8) /* detect insert / card insered */
86#define R592_REG_MSC_IRQ_REMOVE (1 << 9) /* detect removal / card removed */
87#define R592_REG_MSC_FIFO_EMPTY (1 << 10) /* fifo is empty */
88#define R592_REG_MSC_FIFO_DMA_DONE (1 << 11) /* dma enable / dma done */
89
90#define R592_REG_MSC_FIFO_USER_ORN (1 << 12) /* set if software reads empty fifo (if R592_REG_MSC_FIFO_EMPTY is set) */
91#define R592_REG_MSC_FIFO_MISMATH (1 << 13) /* set if amount of data in fifo doesn't match amount in TPC */
92#define R592_REG_MSC_FIFO_DMA_ERR (1 << 14) /* IO failure */
93#define R592_REG_MSC_LED (1 << 15) /* clear to turn led off (only status)*/
94
95#define DMA_IRQ_ACK_MASK \
96 (R592_REG_MSC_FIFO_DMA_DONE | R592_REG_MSC_FIFO_DMA_ERR)
97
98#define DMA_IRQ_EN_MASK (DMA_IRQ_ACK_MASK << 16)
99
100#define IRQ_ALL_ACK_MASK 0x00007F00
101#define IRQ_ALL_EN_MASK (IRQ_ALL_ACK_MASK << 16)
102
103/* DMA address for large FIFO read/writes*/
104#define R592_FIFO_DMA 0x2C
105
106/* PIO access to large FIFO (512 bytes) (big endian)*/
107#define R592_FIFO_PIO 0x30
108#define R592_LFIFO_SIZE 512 /* large fifo size */
109
110
111/* large FIFO DMA settings */
112#define R592_FIFO_DMA_SETTINGS 0x34
113#define R592_FIFO_DMA_SETTINGS_EN (1 << 0) /* DMA enabled */
114#define R592_FIFO_DMA_SETTINGS_DIR (1 << 1) /* Dma direction (1 read, 0 write) */
115#define R592_FIFO_DMA_SETTINGS_CAP (1 << 24) /* Dma is aviable */
116
117/* Maybe just an delay */
118/* Bits 17..19 are just number */
119/* bit 16 is set, then bit 20 is waited */
120/* time to wait is about 50 spins * 2 ^ (bits 17..19) */
121/* seems to be possible just to ignore */
122/* Probably debug register */
123#define R592_REG38 0x38
124#define R592_REG38_CHANGE (1 << 16) /* Start bit */
125#define R592_REG38_DONE (1 << 20) /* HW set this after the delay */
126#define R592_REG38_SHIFT 17
127
128/* Debug register, written (0xABCDEF00) when error happens - not used*/
129#define R592_REG_3C 0x3C
130
131struct r592_device {
132 struct pci_dev *pci_dev;
133 struct memstick_host *host; /* host backpointer */
134 struct memstick_request *req; /* current request */
135
136 /* Registers, IRQ */
137 void __iomem *mmio;
138 int irq;
139 spinlock_t irq_lock;
140 spinlock_t io_thread_lock;
141 struct timer_list detect_timer;
142
143 struct task_struct *io_thread;
144 bool parallel_mode;
145
146 DECLARE_KFIFO(pio_fifo, u8, sizeof(u32));
147
148 /* DMA area */
149 int dma_capable;
150 int dma_error;
151 struct completion dma_done;
152 void *dummy_dma_page;
153 dma_addr_t dummy_dma_page_physical_address;
154
155};
156
157#define DRV_NAME "r592"
158
159
160#define message(format, ...) \
161 printk(KERN_INFO DRV_NAME ": " format "\n", ## __VA_ARGS__)
162
163#define __dbg(level, format, ...) \
164 do { \
165 if (debug >= level) \
166 printk(KERN_DEBUG DRV_NAME \
167 ": " format "\n", ## __VA_ARGS__); \
168 } while (0)
169
170
171#define dbg(format, ...) __dbg(1, format, ## __VA_ARGS__)
172#define dbg_verbose(format, ...) __dbg(2, format, ## __VA_ARGS__)
173#define dbg_reg(format, ...) __dbg(3, format, ## __VA_ARGS__)
174
175#endif