tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/****************************************************************************
2 *
3 * Driver for the IFX spi modem.
4 *
5 * Copyright (C) 2009, 2010 Intel Corp
6 * Jim Stanley <jim.stanley@intel.com>
7 *
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
21 * USA
22 *
23 *
24 *
25 *****************************************************************************/
26#ifndef _IFX6X60_H
27#define _IFX6X60_H
28
29#define DRVNAME "ifx6x60"
30#define TTYNAME "ttyIFX"
31
32/* #define IFX_THROTTLE_CODE */
33
34#define IFX_SPI_MAX_MINORS 1
35#define IFX_SPI_TRANSFER_SIZE 2048
36#define IFX_SPI_FIFO_SIZE 4096
37
38#define IFX_SPI_HEADER_OVERHEAD 4
39#define IFX_RESET_TIMEOUT msecs_to_jiffies(50)
40
41/* device flags bitfield definitions */
42#define IFX_SPI_STATE_PRESENT 0
43#define IFX_SPI_STATE_IO_IN_PROGRESS 1
44#define IFX_SPI_STATE_IO_READY 2
45#define IFX_SPI_STATE_TIMER_PENDING 3
46
47/* flow control bitfields */
48#define IFX_SPI_DCD 0
49#define IFX_SPI_CTS 1
50#define IFX_SPI_DSR 2
51#define IFX_SPI_RI 3
52#define IFX_SPI_DTR 4
53#define IFX_SPI_RTS 5
54#define IFX_SPI_TX_FC 6
55#define IFX_SPI_RX_FC 7
56#define IFX_SPI_UPDATE 8
57
58#define IFX_SPI_PAYLOAD_SIZE (IFX_SPI_TRANSFER_SIZE - \
59 IFX_SPI_HEADER_OVERHEAD)
60
61#define IFX_SPI_IRQ_TYPE DETECT_EDGE_RISING
62#define IFX_SPI_GPIO_TARGET 0
63#define IFX_SPI_GPIO0 0x105
64
65#define IFX_SPI_STATUS_TIMEOUT (2000*HZ)
66
67/* values for bits in power status byte */
68#define IFX_SPI_POWER_DATA_PENDING 1
69#define IFX_SPI_POWER_SRDY 2
70
71struct ifx_spi_device {
72 /* Our SPI device */
73 struct spi_device *spi_dev;
74
75 /* Port specific data */
76 struct kfifo tx_fifo;
77 spinlock_t fifo_lock;
78 unsigned long signal_state;
79
80 /* TTY Layer logic */
81 struct tty_port tty_port;
82 struct device *tty_dev;
83 int minor;
84
85 /* Low level I/O work */
86 struct tasklet_struct io_work_tasklet;
87 unsigned long flags;
88 dma_addr_t rx_dma;
89 dma_addr_t tx_dma;
90
91 int is_6160; /* Modem type */
92
93 spinlock_t write_lock;
94 int write_pending;
95 spinlock_t power_lock;
96 unsigned char power_status;
97
98 unsigned char *rx_buffer;
99 unsigned char *tx_buffer;
100 dma_addr_t rx_bus;
101 dma_addr_t tx_bus;
102 unsigned char spi_more;
103 unsigned char spi_slave_cts;
104
105 struct timer_list spi_timer;
106
107 struct spi_message spi_msg;
108 struct spi_transfer spi_xfer;
109
110 struct {
111 /* gpio lines */
112 unsigned short srdy; /* slave-ready gpio */
113 unsigned short mrdy; /* master-ready gpio */
114 unsigned short reset; /* modem-reset gpio */
115 unsigned short po; /* modem-on gpio */
116 unsigned short reset_out; /* modem-in-reset gpio */
117 /* state/stats */
118 int unack_srdy_int_nb;
119 } gpio;
120
121 /* modem reset */
122 unsigned long mdm_reset_state;
123#define MR_START 0
124#define MR_INPROGRESS 1
125#define MR_COMPLETE 2
126 wait_queue_head_t mdm_reset_wait;
127};
128
129#endif /* _IFX6X60_H */