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authorJohn W. Linville <linville@tuxdriver.com>2012-07-12 13:44:50 -0400
committerJohn W. Linville <linville@tuxdriver.com>2012-07-12 13:44:50 -0400
commit38a00840638b4932152bca48098dbfa069d942a2 (patch)
treedd12897854f6df8aac237d5fd46551c74be8153a /drivers/net/wimax
parent391e5c22f5f4e55817f8ba18a08ea717ed2d4a1f (diff)
parent2f8684ce7a47c91da7e0ccba2686277c103d02b6 (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
Diffstat (limited to 'drivers/net/wimax')
-rw-r--r--drivers/net/wimax/i2400m/Kconfig22
-rw-r--r--drivers/net/wimax/i2400m/Makefile8
-rw-r--r--drivers/net/wimax/i2400m/driver.c3
-rw-r--r--drivers/net/wimax/i2400m/fw.c3
-rw-r--r--drivers/net/wimax/i2400m/i2400m-sdio.h157
-rw-r--r--drivers/net/wimax/i2400m/i2400m.h13
-rw-r--r--drivers/net/wimax/i2400m/sdio-debug-levels.h22
-rw-r--r--drivers/net/wimax/i2400m/sdio-fw.c210
-rw-r--r--drivers/net/wimax/i2400m/sdio-rx.c301
-rw-r--r--drivers/net/wimax/i2400m/sdio-tx.c177
-rw-r--r--drivers/net/wimax/i2400m/sdio.c602
11 files changed, 8 insertions, 1510 deletions
diff --git a/drivers/net/wimax/i2400m/Kconfig b/drivers/net/wimax/i2400m/Kconfig
index 672de18a776c..71453db14258 100644
--- a/drivers/net/wimax/i2400m/Kconfig
+++ b/drivers/net/wimax/i2400m/Kconfig
@@ -7,9 +7,6 @@ config WIMAX_I2400M
7comment "Enable USB support to see WiMAX USB drivers" 7comment "Enable USB support to see WiMAX USB drivers"
8 depends on USB = n 8 depends on USB = n
9 9
10comment "Enable MMC support to see WiMAX SDIO drivers"
11 depends on MMC = n
12
13config WIMAX_I2400M_USB 10config WIMAX_I2400M_USB
14 tristate "Intel Wireless WiMAX Connection 2400 over USB (including 5x50)" 11 tristate "Intel Wireless WiMAX Connection 2400 over USB (including 5x50)"
15 depends on WIMAX && USB 12 depends on WIMAX && USB
@@ -21,25 +18,6 @@ config WIMAX_I2400M_USB
21 18
22 If unsure, it is safe to select M (module). 19 If unsure, it is safe to select M (module).
23 20
24config WIMAX_I2400M_SDIO
25 tristate "Intel Wireless WiMAX Connection 2400 over SDIO"
26 depends on WIMAX && MMC
27 select WIMAX_I2400M
28 help
29 Select if you have a device based on the Intel WiMAX
30 Connection 2400 over SDIO.
31
32 If unsure, it is safe to select M (module).
33
34config WIMAX_IWMC3200_SDIO
35 bool "Intel Wireless Multicom WiMAX Connection 3200 over SDIO (EXPERIMENTAL)"
36 depends on WIMAX_I2400M_SDIO
37 depends on EXPERIMENTAL
38 select IWMC3200TOP
39 help
40 Select if you have a device based on the Intel Multicom WiMAX
41 Connection 3200 over SDIO.
42
43config WIMAX_I2400M_DEBUG_LEVEL 21config WIMAX_I2400M_DEBUG_LEVEL
44 int "WiMAX i2400m debug level" 22 int "WiMAX i2400m debug level"
45 depends on WIMAX_I2400M 23 depends on WIMAX_I2400M
diff --git a/drivers/net/wimax/i2400m/Makefile b/drivers/net/wimax/i2400m/Makefile
index 5d9e018d31af..f6d19c348082 100644
--- a/drivers/net/wimax/i2400m/Makefile
+++ b/drivers/net/wimax/i2400m/Makefile
@@ -1,7 +1,6 @@
1 1
2obj-$(CONFIG_WIMAX_I2400M) += i2400m.o 2obj-$(CONFIG_WIMAX_I2400M) += i2400m.o
3obj-$(CONFIG_WIMAX_I2400M_USB) += i2400m-usb.o 3obj-$(CONFIG_WIMAX_I2400M_USB) += i2400m-usb.o
4obj-$(CONFIG_WIMAX_I2400M_SDIO) += i2400m-sdio.o
5 4
6i2400m-y := \ 5i2400m-y := \
7 control.o \ 6 control.o \
@@ -21,10 +20,3 @@ i2400m-usb-y := \
21 usb-tx.o \ 20 usb-tx.o \
22 usb-rx.o \ 21 usb-rx.o \
23 usb.o 22 usb.o
24
25
26i2400m-sdio-y := \
27 sdio.o \
28 sdio-tx.o \
29 sdio-fw.o \
30 sdio-rx.o
diff --git a/drivers/net/wimax/i2400m/driver.c b/drivers/net/wimax/i2400m/driver.c
index 47cae7150bc1..850b8bc38bee 100644
--- a/drivers/net/wimax/i2400m/driver.c
+++ b/drivers/net/wimax/i2400m/driver.c
@@ -754,8 +754,7 @@ EXPORT_SYMBOL_GPL(i2400m_error_recovery);
754/* 754/*
755 * Alloc the command and ack buffers for boot mode 755 * Alloc the command and ack buffers for boot mode
756 * 756 *
757 * Get the buffers needed to deal with boot mode messages. These 757 * Get the buffers needed to deal with boot mode messages.
758 * buffers need to be allocated before the sdio receive irq is setup.
759 */ 758 */
760static 759static
761int i2400m_bm_buf_alloc(struct i2400m *i2400m) 760int i2400m_bm_buf_alloc(struct i2400m *i2400m)
diff --git a/drivers/net/wimax/i2400m/fw.c b/drivers/net/wimax/i2400m/fw.c
index d09e44970e63..283237f6f074 100644
--- a/drivers/net/wimax/i2400m/fw.c
+++ b/drivers/net/wimax/i2400m/fw.c
@@ -51,8 +51,7 @@
51 * firmware. Normal hardware takes only signed firmware. 51 * firmware. Normal hardware takes only signed firmware.
52 * 52 *
53 * On boot mode, in USB, we write to the device using the bulk out 53 * On boot mode, in USB, we write to the device using the bulk out
54 * endpoint and read from it in the notification endpoint. In SDIO we 54 * endpoint and read from it in the notification endpoint.
55 * talk to it via the write address and read from the read address.
56 * 55 *
57 * Upon entrance to boot mode, the device sends (preceded with a few 56 * Upon entrance to boot mode, the device sends (preceded with a few
58 * zero length packets (ZLPs) on the notification endpoint in USB) a 57 * zero length packets (ZLPs) on the notification endpoint in USB) a
diff --git a/drivers/net/wimax/i2400m/i2400m-sdio.h b/drivers/net/wimax/i2400m/i2400m-sdio.h
deleted file mode 100644
index 1d63ffdedfde..000000000000
--- a/drivers/net/wimax/i2400m/i2400m-sdio.h
+++ /dev/null
@@ -1,157 +0,0 @@
1/*
2 * Intel Wireless WiMAX Connection 2400m
3 * SDIO-specific i2400m driver definitions
4 *
5 *
6 * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * * Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 * * Neither the name of Intel Corporation nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 *
35 * Intel Corporation <linux-wimax@intel.com>
36 * Brian Bian <brian.bian@intel.com>
37 * Dirk Brandewie <dirk.j.brandewie@intel.com>
38 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
39 * Yanir Lubetkin <yanirx.lubetkin@intel.com>
40 * - Initial implementation
41 *
42 *
43 * This driver implements the bus-specific part of the i2400m for
44 * SDIO. Check i2400m.h for a generic driver description.
45 *
46 * ARCHITECTURE
47 *
48 * This driver sits under the bus-generic i2400m driver, providing the
49 * connection to the device.
50 *
51 * When probed, all the function pointers are setup and then the
52 * bus-generic code called. The generic driver will then use the
53 * provided pointers for uploading firmware (i2400ms_bus_bm*() in
54 * sdio-fw.c) and then setting up the device (i2400ms_dev_*() in
55 * sdio.c).
56 *
57 * Once firmware is uploaded, TX functions (sdio-tx.c) are called when
58 * data is ready for transmission in the TX fifo; then the SDIO IRQ is
59 * fired and data is available (sdio-rx.c), it is sent to the generic
60 * driver for processing with i2400m_rx.
61 */
62
63#ifndef __I2400M_SDIO_H__
64#define __I2400M_SDIO_H__
65
66#include "i2400m.h"
67
68/* Host-Device interface for SDIO */
69enum {
70 I2400M_SDIO_BOOT_RETRIES = 3,
71 I2400MS_BLK_SIZE = 256,
72 I2400MS_PL_SIZE_MAX = 0x3E00,
73
74 I2400MS_DATA_ADDR = 0x0,
75 I2400MS_INTR_STATUS_ADDR = 0x13,
76 I2400MS_INTR_CLEAR_ADDR = 0x13,
77 I2400MS_INTR_ENABLE_ADDR = 0x14,
78 I2400MS_INTR_GET_SIZE_ADDR = 0x2C,
79 /* The number of ticks to wait for the device to signal that
80 * it is ready */
81 I2400MS_INIT_SLEEP_INTERVAL = 100,
82 /* How long to wait for the device to settle after reset */
83 I2400MS_SETTLE_TIME = 40,
84 /* The number of msec to wait for IOR after sending IOE */
85 IWMC3200_IOR_TIMEOUT = 10,
86};
87
88
89/**
90 * struct i2400ms - descriptor for a SDIO connected i2400m
91 *
92 * @i2400m: bus-generic i2400m implementation; has to be first (see
93 * it's documentation in i2400m.h).
94 *
95 * @func: pointer to our SDIO function
96 *
97 * @tx_worker: workqueue struct used to TX data when the bus-generic
98 * code signals packets are pending for transmission to the device.
99 *
100 * @tx_workqueue: workqeueue used for data TX; we don't use the
101 * system's workqueue as that might cause deadlocks with code in
102 * the bus-generic driver. The read/write operation to the queue
103 * is protected with spinlock (tx_lock in struct i2400m) to avoid
104 * the queue being destroyed in the middle of a the queue read/write
105 * operation.
106 *
107 * @debugfs_dentry: dentry for the SDIO specific debugfs files
108 *
109 * Note this value is set to NULL upon destruction; this is
110 * because some routinges use it to determine if we are inside the
111 * probe() path or some other path. When debugfs is disabled,
112 * creation sets the dentry to '(void*) -ENODEV', which is valid
113 * for the test.
114 */
115struct i2400ms {
116 struct i2400m i2400m; /* FIRST! See doc */
117 struct sdio_func *func;
118
119 struct work_struct tx_worker;
120 struct workqueue_struct *tx_workqueue;
121 char tx_wq_name[32];
122
123 struct dentry *debugfs_dentry;
124
125 wait_queue_head_t bm_wfa_wq;
126 int bm_wait_result;
127 size_t bm_ack_size;
128
129 /* Device is any of the iwmc3200 SKUs */
130 unsigned iwmc3200:1;
131};
132
133
134static inline
135void i2400ms_init(struct i2400ms *i2400ms)
136{
137 i2400m_init(&i2400ms->i2400m);
138}
139
140
141extern int i2400ms_rx_setup(struct i2400ms *);
142extern void i2400ms_rx_release(struct i2400ms *);
143
144extern int i2400ms_tx_setup(struct i2400ms *);
145extern void i2400ms_tx_release(struct i2400ms *);
146extern void i2400ms_bus_tx_kick(struct i2400m *);
147
148extern ssize_t i2400ms_bus_bm_cmd_send(struct i2400m *,
149 const struct i2400m_bootrom_header *,
150 size_t, int);
151extern ssize_t i2400ms_bus_bm_wait_for_ack(struct i2400m *,
152 struct i2400m_bootrom_header *,
153 size_t);
154extern void i2400ms_bus_bm_release(struct i2400m *);
155extern int i2400ms_bus_bm_setup(struct i2400m *);
156
157#endif /* #ifndef __I2400M_SDIO_H__ */
diff --git a/drivers/net/wimax/i2400m/i2400m.h b/drivers/net/wimax/i2400m/i2400m.h
index c806d4550212..79c6505b5c20 100644
--- a/drivers/net/wimax/i2400m/i2400m.h
+++ b/drivers/net/wimax/i2400m/i2400m.h
@@ -46,7 +46,7 @@
46 * - bus generic driver (this part) 46 * - bus generic driver (this part)
47 * 47 *
48 * The bus specific driver sets up stuff specific to the bus the 48 * The bus specific driver sets up stuff specific to the bus the
49 * device is connected to (USB, SDIO, PCI, tam-tam...non-authoritative 49 * device is connected to (USB, PCI, tam-tam...non-authoritative
50 * nor binding list) which is basically the device-model management 50 * nor binding list) which is basically the device-model management
51 * (probe/disconnect, etc), moving data from device to kernel and 51 * (probe/disconnect, etc), moving data from device to kernel and
52 * back, doing the power saving details and reseting the device. 52 * back, doing the power saving details and reseting the device.
@@ -238,14 +238,13 @@ struct i2400m_barker_db;
238 * amount needed for loading firmware, where us dev_start/stop setup 238 * amount needed for loading firmware, where us dev_start/stop setup
239 * the rest needed to do full data/control traffic. 239 * the rest needed to do full data/control traffic.
240 * 240 *
241 * @bus_tx_block_size: [fill] SDIO imposes a 256 block size, USB 16, 241 * @bus_tx_block_size: [fill] USB imposes a 16 block size, but other
242 * so we have a tx_blk_size variable that the bus layer sets to 242 * busses will differ. So we have a tx_blk_size variable that the
243 * tell the engine how much of that we need. 243 * bus layer sets to tell the engine how much of that we need.
244 * 244 *
245 * @bus_tx_room_min: [fill] Minimum room required while allocating 245 * @bus_tx_room_min: [fill] Minimum room required while allocating
246 * TX queue's buffer space for message header. SDIO requires 246 * TX queue's buffer space for message header. USB requires
247 * 224 bytes and USB 16 bytes. Refer bus specific driver code 247 * 16 bytes. Refer to bus specific driver code for details.
248 * for details.
249 * 248 *
250 * @bus_pl_size_max: [fill] Maximum payload size. 249 * @bus_pl_size_max: [fill] Maximum payload size.
251 * 250 *
diff --git a/drivers/net/wimax/i2400m/sdio-debug-levels.h b/drivers/net/wimax/i2400m/sdio-debug-levels.h
deleted file mode 100644
index c51998741301..000000000000
--- a/drivers/net/wimax/i2400m/sdio-debug-levels.h
+++ /dev/null
@@ -1,22 +0,0 @@
1/*
2 * debug levels control file for the i2400m module's
3 */
4#ifndef __debug_levels__h__
5#define __debug_levels__h__
6
7/* Maximum compile and run time debug level for all submodules */
8#define D_MODULENAME i2400m_sdio
9#define D_MASTER CONFIG_WIMAX_I2400M_DEBUG_LEVEL
10
11#include <linux/wimax/debug.h>
12
13/* List of all the enabled modules */
14enum d_module {
15 D_SUBMODULE_DECLARE(main),
16 D_SUBMODULE_DECLARE(tx),
17 D_SUBMODULE_DECLARE(rx),
18 D_SUBMODULE_DECLARE(fw)
19};
20
21
22#endif /* #ifndef __debug_levels__h__ */
diff --git a/drivers/net/wimax/i2400m/sdio-fw.c b/drivers/net/wimax/i2400m/sdio-fw.c
deleted file mode 100644
index 8e025418f5be..000000000000
--- a/drivers/net/wimax/i2400m/sdio-fw.c
+++ /dev/null
@@ -1,210 +0,0 @@
1/*
2 * Intel Wireless WiMAX Connection 2400m
3 * Firmware uploader's SDIO specifics
4 *
5 *
6 * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * * Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 * * Neither the name of Intel Corporation nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 *
35 * Intel Corporation <linux-wimax@intel.com>
36 * Yanir Lubetkin <yanirx.lubetkin@intel.com>
37 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
38 * - Initial implementation
39 *
40 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
41 * - Bus generic/specific split for USB
42 *
43 * Dirk Brandewie <dirk.j.brandewie@intel.com>
44 * - Initial implementation for SDIO
45 *
46 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
47 * - SDIO rehash for changes in the bus-driver model
48 *
49 * Dirk Brandewie <dirk.j.brandewie@intel.com>
50 * - Make it IRQ based, not polling
51 *
52 * THE PROCEDURE
53 *
54 * See fw.c for the generic description of this procedure.
55 *
56 * This file implements only the SDIO specifics. It boils down to how
57 * to send a command and waiting for an acknowledgement from the
58 * device.
59 *
60 * All this code is sequential -- all i2400ms_bus_bm_*() functions are
61 * executed in the same thread, except i2400ms_bm_irq() [on its own by
62 * the SDIO driver]. This makes it possible to avoid locking.
63 *
64 * COMMAND EXECUTION
65 *
66 * The generic firmware upload code will call i2400m_bus_bm_cmd_send()
67 * to send commands.
68 *
69 * The SDIO devices expects things in 256 byte blocks, so it will pad
70 * it, compute the checksum (if needed) and pass it to SDIO.
71 *
72 * ACK RECEPTION
73 *
74 * This works in IRQ mode -- the fw loader says when to wait for data
75 * and for that it calls i2400ms_bus_bm_wait_for_ack().
76 *
77 * This checks if there is any data available (RX size > 0); if not,
78 * waits for the IRQ handler to notify about it. Once there is data,
79 * it is read and passed to the caller. Doing it this way we don't
80 * need much coordination/locking, and it makes it much more difficult
81 * for an interrupt to be lost and the wait_for_ack() function getting
82 * stuck even when data is pending.
83 */
84#include <linux/mmc/sdio_func.h>
85#include "i2400m-sdio.h"
86
87
88#define D_SUBMODULE fw
89#include "sdio-debug-levels.h"
90
91
92/*
93 * Send a boot-mode command to the SDIO function
94 *
95 * We use a bounce buffer (i2400m->bm_cmd_buf) because we need to
96 * touch the header if the RAW flag is not set.
97 *
98 * @flags: pass thru from i2400m_bm_cmd()
99 * @return: cmd_size if ok, < 0 errno code on error.
100 *
101 * Note the command is padded to the SDIO block size for the device.
102 */
103ssize_t i2400ms_bus_bm_cmd_send(struct i2400m *i2400m,
104 const struct i2400m_bootrom_header *_cmd,
105 size_t cmd_size, int flags)
106{
107 ssize_t result;
108 struct device *dev = i2400m_dev(i2400m);
109 struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
110 int opcode = _cmd == NULL ? -1 : i2400m_brh_get_opcode(_cmd);
111 struct i2400m_bootrom_header *cmd;
112 /* SDIO restriction */
113 size_t cmd_size_a = ALIGN(cmd_size, I2400MS_BLK_SIZE);
114
115 d_fnstart(5, dev, "(i2400m %p cmd %p size %zu)\n",
116 i2400m, _cmd, cmd_size);
117 result = -E2BIG;
118 if (cmd_size > I2400M_BM_CMD_BUF_SIZE)
119 goto error_too_big;
120
121 if (_cmd != i2400m->bm_cmd_buf)
122 memmove(i2400m->bm_cmd_buf, _cmd, cmd_size);
123 cmd = i2400m->bm_cmd_buf;
124 if (cmd_size_a > cmd_size) /* Zero pad space */
125 memset(i2400m->bm_cmd_buf + cmd_size, 0, cmd_size_a - cmd_size);
126 if ((flags & I2400M_BM_CMD_RAW) == 0) {
127 if (WARN_ON(i2400m_brh_get_response_required(cmd) == 0))
128 dev_warn(dev, "SW BUG: response_required == 0\n");
129 i2400m_bm_cmd_prepare(cmd);
130 }
131 d_printf(4, dev, "BM cmd %d: %zu bytes (%zu padded)\n",
132 opcode, cmd_size, cmd_size_a);
133 d_dump(5, dev, cmd, cmd_size);
134
135 sdio_claim_host(i2400ms->func); /* Send & check */
136 result = sdio_memcpy_toio(i2400ms->func, I2400MS_DATA_ADDR,
137 i2400m->bm_cmd_buf, cmd_size_a);
138 sdio_release_host(i2400ms->func);
139 if (result < 0) {
140 dev_err(dev, "BM cmd %d: cannot send: %ld\n",
141 opcode, (long) result);
142 goto error_cmd_send;
143 }
144 result = cmd_size;
145error_cmd_send:
146error_too_big:
147 d_fnend(5, dev, "(i2400m %p cmd %p size %zu) = %d\n",
148 i2400m, _cmd, cmd_size, (int) result);
149 return result;
150}
151
152
153/*
154 * Read an ack from the device's boot-mode
155 *
156 * @i2400m:
157 * @_ack: pointer to where to store the read data
158 * @ack_size: how many bytes we should read
159 *
160 * Returns: < 0 errno code on error; otherwise, amount of received bytes.
161 *
162 * The ACK for a BM command is always at least sizeof(*ack) bytes, so
163 * check for that. We don't need to check for device reboots
164 *
165 */
166ssize_t i2400ms_bus_bm_wait_for_ack(struct i2400m *i2400m,
167 struct i2400m_bootrom_header *ack,
168 size_t ack_size)
169{
170 ssize_t result;
171 struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
172 struct sdio_func *func = i2400ms->func;
173 struct device *dev = &func->dev;
174 int size;
175
176 BUG_ON(sizeof(*ack) > ack_size);
177
178 d_fnstart(5, dev, "(i2400m %p ack %p size %zu)\n",
179 i2400m, ack, ack_size);
180
181 result = wait_event_timeout(i2400ms->bm_wfa_wq,
182 i2400ms->bm_ack_size != -EINPROGRESS,
183 2 * HZ);
184 if (result == 0) {
185 result = -ETIMEDOUT;
186 dev_err(dev, "BM: error waiting for an ack\n");
187 goto error_timeout;
188 }
189
190 spin_lock(&i2400m->rx_lock);
191 result = i2400ms->bm_ack_size;
192 BUG_ON(result == -EINPROGRESS);
193 if (result < 0) /* so we exit when rx_release() is called */
194 dev_err(dev, "BM: %s failed: %zd\n", __func__, result);
195 else {
196 size = min(ack_size, i2400ms->bm_ack_size);
197 memcpy(ack, i2400m->bm_ack_buf, size);
198 }
199 /*
200 * Remember always to clear the bm_ack_size to -EINPROGRESS
201 * after the RX data is processed
202 */
203 i2400ms->bm_ack_size = -EINPROGRESS;
204 spin_unlock(&i2400m->rx_lock);
205
206error_timeout:
207 d_fnend(5, dev, "(i2400m %p ack %p size %zu) = %zd\n",
208 i2400m, ack, ack_size, result);
209 return result;
210}
diff --git a/drivers/net/wimax/i2400m/sdio-rx.c b/drivers/net/wimax/i2400m/sdio-rx.c
deleted file mode 100644
index fb6396dd115f..000000000000
--- a/drivers/net/wimax/i2400m/sdio-rx.c
+++ /dev/null
@@ -1,301 +0,0 @@
1/*
2 * Intel Wireless WiMAX Connection 2400m
3 * SDIO RX handling
4 *
5 *
6 * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * * Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 * * Neither the name of Intel Corporation nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 *
35 * Intel Corporation <linux-wimax@intel.com>
36 * Dirk Brandewie <dirk.j.brandewie@intel.com>
37 * - Initial implementation
38 *
39 *
40 * This handles the RX path on SDIO.
41 *
42 * The SDIO bus driver calls the "irq" routine when data is available.
43 * This is not a traditional interrupt routine since the SDIO bus
44 * driver calls us from its irq thread context. Because of this
45 * sleeping in the SDIO RX IRQ routine is okay.
46 *
47 * From there on, we obtain the size of the data that is available,
48 * allocate an skb, copy it and then pass it to the generic driver's
49 * RX routine [i2400m_rx()].
50 *
51 * ROADMAP
52 *
53 * i2400ms_irq()
54 * i2400ms_rx()
55 * __i2400ms_rx_get_size()
56 * i2400m_is_boot_barker()
57 * i2400m_rx()
58 *
59 * i2400ms_rx_setup()
60 *
61 * i2400ms_rx_release()
62 */
63#include <linux/workqueue.h>
64#include <linux/wait.h>
65#include <linux/skbuff.h>
66#include <linux/mmc/sdio.h>
67#include <linux/mmc/sdio_func.h>
68#include <linux/slab.h>
69#include "i2400m-sdio.h"
70
71#define D_SUBMODULE rx
72#include "sdio-debug-levels.h"
73
74static const __le32 i2400m_ACK_BARKER[4] = {
75 __constant_cpu_to_le32(I2400M_ACK_BARKER),
76 __constant_cpu_to_le32(I2400M_ACK_BARKER),
77 __constant_cpu_to_le32(I2400M_ACK_BARKER),
78 __constant_cpu_to_le32(I2400M_ACK_BARKER)
79};
80
81
82/*
83 * Read and return the amount of bytes available for RX
84 *
85 * The RX size has to be read like this: byte reads of three
86 * sequential locations; then glue'em together.
87 *
88 * sdio_readl() doesn't work.
89 */
90static ssize_t __i2400ms_rx_get_size(struct i2400ms *i2400ms)
91{
92 int ret, cnt, val;
93 ssize_t rx_size;
94 unsigned xfer_size_addr;
95 struct sdio_func *func = i2400ms->func;
96 struct device *dev = &i2400ms->func->dev;
97
98 d_fnstart(7, dev, "(i2400ms %p)\n", i2400ms);
99 xfer_size_addr = I2400MS_INTR_GET_SIZE_ADDR;
100 rx_size = 0;
101 for (cnt = 0; cnt < 3; cnt++) {
102 val = sdio_readb(func, xfer_size_addr + cnt, &ret);
103 if (ret < 0) {
104 dev_err(dev, "RX: Can't read byte %d of RX size from "
105 "0x%08x: %d\n", cnt, xfer_size_addr + cnt, ret);
106 rx_size = ret;
107 goto error_read;
108 }
109 rx_size = rx_size << 8 | (val & 0xff);
110 }
111 d_printf(6, dev, "RX: rx_size is %ld\n", (long) rx_size);
112error_read:
113 d_fnend(7, dev, "(i2400ms %p) = %ld\n", i2400ms, (long) rx_size);
114 return rx_size;
115}
116
117
118/*
119 * Read data from the device (when in normal)
120 *
121 * Allocate an SKB of the right size, read the data in and then
122 * deliver it to the generic layer.
123 *
124 * We also check for a reboot barker. That means the device died and
125 * we have to reboot it.
126 */
127static
128void i2400ms_rx(struct i2400ms *i2400ms)
129{
130 int ret;
131 struct sdio_func *func = i2400ms->func;
132 struct device *dev = &func->dev;
133 struct i2400m *i2400m = &i2400ms->i2400m;
134 struct sk_buff *skb;
135 ssize_t rx_size;
136
137 d_fnstart(7, dev, "(i2400ms %p)\n", i2400ms);
138 rx_size = __i2400ms_rx_get_size(i2400ms);
139 if (rx_size < 0) {
140 ret = rx_size;
141 goto error_get_size;
142 }
143 /*
144 * Hardware quirk: make sure to clear the INTR status register
145 * AFTER getting the data transfer size.
146 */
147 sdio_writeb(func, 1, I2400MS_INTR_CLEAR_ADDR, &ret);
148
149 ret = -ENOMEM;
150 skb = alloc_skb(rx_size, GFP_ATOMIC);
151 if (NULL == skb) {
152 dev_err(dev, "RX: unable to alloc skb\n");
153 goto error_alloc_skb;
154 }
155 ret = sdio_memcpy_fromio(func, skb->data,
156 I2400MS_DATA_ADDR, rx_size);
157 if (ret < 0) {
158 dev_err(dev, "RX: SDIO data read failed: %d\n", ret);
159 goto error_memcpy_fromio;
160 }
161
162 rmb(); /* make sure we get boot_mode from dev_reset_handle */
163 if (unlikely(i2400m->boot_mode == 1)) {
164 spin_lock(&i2400m->rx_lock);
165 i2400ms->bm_ack_size = rx_size;
166 spin_unlock(&i2400m->rx_lock);
167 memcpy(i2400m->bm_ack_buf, skb->data, rx_size);
168 wake_up(&i2400ms->bm_wfa_wq);
169 d_printf(5, dev, "RX: SDIO boot mode message\n");
170 kfree_skb(skb);
171 goto out;
172 }
173 ret = -EIO;
174 if (unlikely(rx_size < sizeof(__le32))) {
175 dev_err(dev, "HW BUG? only %zu bytes received\n", rx_size);
176 goto error_bad_size;
177 }
178 if (likely(i2400m_is_d2h_barker(skb->data))) {
179 skb_put(skb, rx_size);
180 i2400m_rx(i2400m, skb);
181 } else if (unlikely(i2400m_is_boot_barker(i2400m,
182 skb->data, rx_size))) {
183 ret = i2400m_dev_reset_handle(i2400m, "device rebooted");
184 dev_err(dev, "RX: SDIO reboot barker\n");
185 kfree_skb(skb);
186 } else {
187 i2400m_unknown_barker(i2400m, skb->data, rx_size);
188 kfree_skb(skb);
189 }
190out:
191 d_fnend(7, dev, "(i2400ms %p) = void\n", i2400ms);
192 return;
193
194error_memcpy_fromio:
195 kfree_skb(skb);
196error_alloc_skb:
197error_get_size:
198error_bad_size:
199 d_fnend(7, dev, "(i2400ms %p) = %d\n", i2400ms, ret);
200}
201
202
203/*
204 * Process an interrupt from the SDIO card
205 *
206 * FIXME: need to process other events that are not just ready-to-read
207 *
208 * Checks there is data ready and then proceeds to read it.
209 */
210static
211void i2400ms_irq(struct sdio_func *func)
212{
213 int ret;
214 struct i2400ms *i2400ms = sdio_get_drvdata(func);
215 struct device *dev = &func->dev;
216 int val;
217
218 d_fnstart(6, dev, "(i2400ms %p)\n", i2400ms);
219 val = sdio_readb(func, I2400MS_INTR_STATUS_ADDR, &ret);
220 if (ret < 0) {
221 dev_err(dev, "RX: Can't read interrupt status: %d\n", ret);
222 goto error_no_irq;
223 }
224 if (!val) {
225 dev_err(dev, "RX: BUG? got IRQ but no interrupt ready?\n");
226 goto error_no_irq;
227 }
228 i2400ms_rx(i2400ms);
229error_no_irq:
230 d_fnend(6, dev, "(i2400ms %p) = void\n", i2400ms);
231}
232
233
234/*
235 * Setup SDIO RX
236 *
237 * Hooks up the IRQ handler and then enables IRQs.
238 */
239int i2400ms_rx_setup(struct i2400ms *i2400ms)
240{
241 int result;
242 struct sdio_func *func = i2400ms->func;
243 struct device *dev = &func->dev;
244 struct i2400m *i2400m = &i2400ms->i2400m;
245
246 d_fnstart(5, dev, "(i2400ms %p)\n", i2400ms);
247
248 init_waitqueue_head(&i2400ms->bm_wfa_wq);
249 spin_lock(&i2400m->rx_lock);
250 i2400ms->bm_wait_result = -EINPROGRESS;
251 /*
252 * Before we are about to enable the RX interrupt, make sure
253 * bm_ack_size is cleared to -EINPROGRESS which indicates
254 * no RX interrupt happened yet or the previous interrupt
255 * has been handled, we are ready to take the new interrupt
256 */
257 i2400ms->bm_ack_size = -EINPROGRESS;
258 spin_unlock(&i2400m->rx_lock);
259
260 sdio_claim_host(func);
261 result = sdio_claim_irq(func, i2400ms_irq);
262 if (result < 0) {
263 dev_err(dev, "Cannot claim IRQ: %d\n", result);
264 goto error_irq_claim;
265 }
266 result = 0;
267 sdio_writeb(func, 1, I2400MS_INTR_ENABLE_ADDR, &result);
268 if (result < 0) {
269 sdio_release_irq(func);
270 dev_err(dev, "Failed to enable interrupts %d\n", result);
271 }
272error_irq_claim:
273 sdio_release_host(func);
274 d_fnend(5, dev, "(i2400ms %p) = %d\n", i2400ms, result);
275 return result;
276}
277
278
279/*
280 * Tear down SDIO RX
281 *
282 * Disables IRQs in the device and removes the IRQ handler.
283 */
284void i2400ms_rx_release(struct i2400ms *i2400ms)
285{
286 int result;
287 struct sdio_func *func = i2400ms->func;
288 struct device *dev = &func->dev;
289 struct i2400m *i2400m = &i2400ms->i2400m;
290
291 d_fnstart(5, dev, "(i2400ms %p)\n", i2400ms);
292 spin_lock(&i2400m->rx_lock);
293 i2400ms->bm_ack_size = -EINTR;
294 spin_unlock(&i2400m->rx_lock);
295 wake_up_all(&i2400ms->bm_wfa_wq);
296 sdio_claim_host(func);
297 sdio_writeb(func, 0, I2400MS_INTR_ENABLE_ADDR, &result);
298 sdio_release_irq(func);
299 sdio_release_host(func);
300 d_fnend(5, dev, "(i2400ms %p) = %d\n", i2400ms, result);
301}
diff --git a/drivers/net/wimax/i2400m/sdio-tx.c b/drivers/net/wimax/i2400m/sdio-tx.c
deleted file mode 100644
index b53cd1c80e3e..000000000000
--- a/drivers/net/wimax/i2400m/sdio-tx.c
+++ /dev/null
@@ -1,177 +0,0 @@
1/*
2 * Intel Wireless WiMAX Connection 2400m
3 * SDIO TX transaction backends
4 *
5 *
6 * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * * Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 * * Neither the name of Intel Corporation nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 *
35 * Intel Corporation <linux-wimax@intel.com>
36 * Dirk Brandewie <dirk.j.brandewie@intel.com>
37 * - Initial implementation
38 *
39 *
40 * Takes the TX messages in the i2400m's driver TX FIFO and sends them
41 * to the device until there are no more.
42 *
43 * If we fail sending the message, we just drop it. There isn't much
44 * we can do at this point. Most of the traffic is network, which has
45 * recovery methods for dropped packets.
46 *
47 * The SDIO functions are not atomic, so we can't run from the context
48 * where i2400m->bus_tx_kick() [i2400ms_bus_tx_kick()] is being called
49 * (some times atomic). Thus, the actual TX work is deferred to a
50 * workqueue.
51 *
52 * ROADMAP
53 *
54 * i2400ms_bus_tx_kick()
55 * i2400ms_tx_submit() [through workqueue]
56 *
57 * i2400m_tx_setup()
58 *
59 * i2400m_tx_release()
60 */
61#include <linux/mmc/sdio_func.h>
62#include "i2400m-sdio.h"
63
64#define D_SUBMODULE tx
65#include "sdio-debug-levels.h"
66
67
68/*
69 * Pull TX transations from the TX FIFO and send them to the device
70 * until there are no more.
71 */
72static
73void i2400ms_tx_submit(struct work_struct *ws)
74{
75 int result;
76 struct i2400ms *i2400ms = container_of(ws, struct i2400ms, tx_worker);
77 struct i2400m *i2400m = &i2400ms->i2400m;
78 struct sdio_func *func = i2400ms->func;
79 struct device *dev = &func->dev;
80 struct i2400m_msg_hdr *tx_msg;
81 size_t tx_msg_size;
82
83 d_fnstart(4, dev, "(i2400ms %p, i2400m %p)\n", i2400ms, i2400ms);
84
85 while (NULL != (tx_msg = i2400m_tx_msg_get(i2400m, &tx_msg_size))) {
86 d_printf(2, dev, "TX: submitting %zu bytes\n", tx_msg_size);
87 d_dump(5, dev, tx_msg, tx_msg_size);
88
89 sdio_claim_host(func);
90 result = sdio_memcpy_toio(func, 0, tx_msg, tx_msg_size);
91 sdio_release_host(func);
92
93 i2400m_tx_msg_sent(i2400m);
94
95 if (result < 0) {
96 dev_err(dev, "TX: cannot submit TX; tx_msg @%zu %zu B:"
97 " %d\n", (void *) tx_msg - i2400m->tx_buf,
98 tx_msg_size, result);
99 }
100
101 if (result == -ETIMEDOUT) {
102 i2400m_error_recovery(i2400m);
103 break;
104 }
105 d_printf(2, dev, "TX: %zub submitted\n", tx_msg_size);
106 }
107
108 d_fnend(4, dev, "(i2400ms %p) = void\n", i2400ms);
109}
110
111
112/*
113 * The generic driver notifies us that there is data ready for TX
114 *
115 * Schedule a run of i2400ms_tx_submit() to handle it.
116 */
117void i2400ms_bus_tx_kick(struct i2400m *i2400m)
118{
119 struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
120 struct device *dev = &i2400ms->func->dev;
121 unsigned long flags;
122
123 d_fnstart(3, dev, "(i2400m %p) = void\n", i2400m);
124
125 /* schedule tx work, this is because tx may block, therefore
126 * it has to run in a thread context.
127 */
128 spin_lock_irqsave(&i2400m->tx_lock, flags);
129 if (i2400ms->tx_workqueue != NULL)
130 queue_work(i2400ms->tx_workqueue, &i2400ms->tx_worker);
131 spin_unlock_irqrestore(&i2400m->tx_lock, flags);
132
133 d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
134}
135
136int i2400ms_tx_setup(struct i2400ms *i2400ms)
137{
138 int result;
139 struct device *dev = &i2400ms->func->dev;
140 struct i2400m *i2400m = &i2400ms->i2400m;
141 struct workqueue_struct *tx_workqueue;
142 unsigned long flags;
143
144 d_fnstart(5, dev, "(i2400ms %p)\n", i2400ms);
145
146 INIT_WORK(&i2400ms->tx_worker, i2400ms_tx_submit);
147 snprintf(i2400ms->tx_wq_name, sizeof(i2400ms->tx_wq_name),
148 "%s-tx", i2400m->wimax_dev.name);
149 tx_workqueue =
150 create_singlethread_workqueue(i2400ms->tx_wq_name);
151 if (tx_workqueue == NULL) {
152 dev_err(dev, "TX: failed to create workqueue\n");
153 result = -ENOMEM;
154 } else
155 result = 0;
156 spin_lock_irqsave(&i2400m->tx_lock, flags);
157 i2400ms->tx_workqueue = tx_workqueue;
158 spin_unlock_irqrestore(&i2400m->tx_lock, flags);
159 d_fnend(5, dev, "(i2400ms %p) = %d\n", i2400ms, result);
160 return result;
161}
162
163void i2400ms_tx_release(struct i2400ms *i2400ms)
164{
165 struct i2400m *i2400m = &i2400ms->i2400m;
166 struct workqueue_struct *tx_workqueue;
167 unsigned long flags;
168
169 tx_workqueue = i2400ms->tx_workqueue;
170
171 spin_lock_irqsave(&i2400m->tx_lock, flags);
172 i2400ms->tx_workqueue = NULL;
173 spin_unlock_irqrestore(&i2400m->tx_lock, flags);
174
175 if (tx_workqueue)
176 destroy_workqueue(tx_workqueue);
177}
diff --git a/drivers/net/wimax/i2400m/sdio.c b/drivers/net/wimax/i2400m/sdio.c
deleted file mode 100644
index 21a9edd6e75d..000000000000
--- a/drivers/net/wimax/i2400m/sdio.c
+++ /dev/null
@@ -1,602 +0,0 @@
1/*
2 * Intel Wireless WiMAX Connection 2400m
3 * Linux driver model glue for the SDIO device, reset & fw upload
4 *
5 *
6 * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com>
7 * Dirk Brandewie <dirk.j.brandewie@intel.com>
8 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
9 * Yanir Lubetkin <yanirx.lubetkin@intel.com>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License version
13 * 2 as published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 * 02110-1301, USA.
24 *
25 *
26 * See i2400m-sdio.h for a general description of this driver.
27 *
28 * This file implements driver model glue, and hook ups for the
29 * generic driver to implement the bus-specific functions (device
30 * communication setup/tear down, firmware upload and resetting).
31 *
32 * ROADMAP
33 *
34 * i2400m_probe()
35 * alloc_netdev()
36 * i2400ms_netdev_setup()
37 * i2400ms_init()
38 * i2400m_netdev_setup()
39 * i2400ms_enable_function()
40 * i2400m_setup()
41 *
42 * i2400m_remove()
43 * i2400m_release()
44 * free_netdev(net_dev)
45 *
46 * i2400ms_bus_reset() Called by i2400m_reset
47 * __i2400ms_reset()
48 * __i2400ms_send_barker()
49 */
50
51#include <linux/slab.h>
52#include <linux/debugfs.h>
53#include <linux/mmc/sdio_ids.h>
54#include <linux/mmc/sdio.h>
55#include <linux/mmc/sdio_func.h>
56#include "i2400m-sdio.h"
57#include <linux/wimax/i2400m.h>
58#include <linux/module.h>
59
60#define D_SUBMODULE main
61#include "sdio-debug-levels.h"
62
63/* IOE WiMAX function timeout in seconds */
64static int ioe_timeout = 2;
65module_param(ioe_timeout, int, 0);
66
67static char i2400ms_debug_params[128];
68module_param_string(debug, i2400ms_debug_params, sizeof(i2400ms_debug_params),
69 0644);
70MODULE_PARM_DESC(debug,
71 "String of space-separated NAME:VALUE pairs, where NAMEs "
72 "are the different debug submodules and VALUE are the "
73 "initial debug value to set.");
74
75/* Our firmware file name list */
76static const char *i2400ms_bus_fw_names[] = {
77#define I2400MS_FW_FILE_NAME "i2400m-fw-sdio-1.3.sbcf"
78 I2400MS_FW_FILE_NAME,
79 NULL
80};
81
82
83static const struct i2400m_poke_table i2400ms_pokes[] = {
84 I2400M_FW_POKE(0x6BE260, 0x00000088),
85 I2400M_FW_POKE(0x080550, 0x00000005),
86 I2400M_FW_POKE(0xAE0000, 0x00000000),
87 I2400M_FW_POKE(0x000000, 0x00000000), /* MUST be 0 terminated or bad
88 * things will happen */
89};
90
91/*
92 * Enable the SDIO function
93 *
94 * Tries to enable the SDIO function; might fail if it is still not
95 * ready (in some hardware, the SDIO WiMAX function is only enabled
96 * when we ask it to explicitly doing). Tries until a timeout is
97 * reached.
98 *
99 * The @maxtries argument indicates how many times (at most) it should
100 * be tried to enable the function. 0 means forever. This acts along
101 * with the timeout (ie: it'll stop trying as soon as the maximum
102 * number of tries is reached _or_ as soon as the timeout is reached).
103 *
104 * The reverse of this is...sdio_disable_function()
105 *
106 * Returns: 0 if the SDIO function was enabled, < 0 errno code on
107 * error (-ENODEV when it was unable to enable the function).
108 */
109static
110int i2400ms_enable_function(struct i2400ms *i2400ms, unsigned maxtries)
111{
112 struct sdio_func *func = i2400ms->func;
113 u64 timeout;
114 int err;
115 struct device *dev = &func->dev;
116 unsigned tries = 0;
117
118 d_fnstart(3, dev, "(func %p)\n", func);
119 /* Setup timeout (FIXME: This needs to read the CIS table to
120 * get a real timeout) and then wait for the device to signal
121 * it is ready */
122 timeout = get_jiffies_64() + ioe_timeout * HZ;
123 err = -ENODEV;
124 while (err != 0 && time_before64(get_jiffies_64(), timeout)) {
125 sdio_claim_host(func);
126 /*
127 * There is a sillicon bug on the IWMC3200, where the
128 * IOE timeout will cause problems on Moorestown
129 * platforms (system hang). We explicitly overwrite
130 * func->enable_timeout here to work around the issue.
131 */
132 if (i2400ms->iwmc3200)
133 func->enable_timeout = IWMC3200_IOR_TIMEOUT;
134 err = sdio_enable_func(func);
135 if (0 == err) {
136 sdio_release_host(func);
137 d_printf(2, dev, "SDIO function enabled\n");
138 goto function_enabled;
139 }
140 d_printf(2, dev, "SDIO function failed to enable: %d\n", err);
141 sdio_release_host(func);
142 if (maxtries > 0 && ++tries >= maxtries) {
143 err = -ETIME;
144 break;
145 }
146 msleep(I2400MS_INIT_SLEEP_INTERVAL);
147 }
148 /* If timed out, device is not there yet -- get -ENODEV so
149 * the device driver core will retry later on. */
150 if (err == -ETIME) {
151 dev_err(dev, "Can't enable WiMAX function; "
152 " has the function been enabled?\n");
153 err = -ENODEV;
154 }
155function_enabled:
156 d_fnend(3, dev, "(func %p) = %d\n", func, err);
157 return err;
158}
159
160
161/*
162 * Setup minimal device communication infrastructure needed to at
163 * least be able to update the firmware.
164 *
165 * Note the ugly trick: if we are in the probe path
166 * (i2400ms->debugfs_dentry == NULL), we only retry function
167 * enablement one, to avoid racing with the iwmc3200 top controller.
168 */
169static
170int i2400ms_bus_setup(struct i2400m *i2400m)
171{
172 int result;
173 struct i2400ms *i2400ms =
174 container_of(i2400m, struct i2400ms, i2400m);
175 struct device *dev = i2400m_dev(i2400m);
176 struct sdio_func *func = i2400ms->func;
177 int retries;
178
179 sdio_claim_host(func);
180 result = sdio_set_block_size(func, I2400MS_BLK_SIZE);
181 sdio_release_host(func);
182 if (result < 0) {
183 dev_err(dev, "Failed to set block size: %d\n", result);
184 goto error_set_blk_size;
185 }
186
187 if (i2400ms->iwmc3200 && i2400ms->debugfs_dentry == NULL)
188 retries = 1;
189 else
190 retries = 0;
191 result = i2400ms_enable_function(i2400ms, retries);
192 if (result < 0) {
193 dev_err(dev, "Cannot enable SDIO function: %d\n", result);
194 goto error_func_enable;
195 }
196
197 result = i2400ms_tx_setup(i2400ms);
198 if (result < 0)
199 goto error_tx_setup;
200 result = i2400ms_rx_setup(i2400ms);
201 if (result < 0)
202 goto error_rx_setup;
203 return 0;
204
205error_rx_setup:
206 i2400ms_tx_release(i2400ms);
207error_tx_setup:
208 sdio_claim_host(func);
209 sdio_disable_func(func);
210 sdio_release_host(func);
211error_func_enable:
212error_set_blk_size:
213 return result;
214}
215
216
217/*
218 * Tear down minimal device communication infrastructure needed to at
219 * least be able to update the firmware.
220 */
221static
222void i2400ms_bus_release(struct i2400m *i2400m)
223{
224 struct i2400ms *i2400ms =
225 container_of(i2400m, struct i2400ms, i2400m);
226 struct sdio_func *func = i2400ms->func;
227
228 i2400ms_rx_release(i2400ms);
229 i2400ms_tx_release(i2400ms);
230 sdio_claim_host(func);
231 sdio_disable_func(func);
232 sdio_release_host(func);
233}
234
235
236/*
237 * Setup driver resources needed to communicate with the device
238 *
239 * The fw needs some time to settle, and it was just uploaded,
240 * so give it a break first. I'd prefer to just wait for the device to
241 * send something, but seems the poking we do to enable SDIO stuff
242 * interferes with it, so just give it a break before starting...
243 */
244static
245int i2400ms_bus_dev_start(struct i2400m *i2400m)
246{
247 struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
248 struct sdio_func *func = i2400ms->func;
249 struct device *dev = &func->dev;
250
251 d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
252 msleep(200);
253 d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, 0);
254 return 0;
255}
256
257
258/*
259 * Sends a barker buffer to the device
260 *
261 * This helper will allocate a kmalloced buffer and use it to transmit
262 * (then free it). Reason for this is that the SDIO host controller
263 * expects alignment (unknown exactly which) which the stack won't
264 * really provide and certain arches/host-controller combinations
265 * cannot use stack/vmalloc/text areas for DMA transfers.
266 */
267static
268int __i2400ms_send_barker(struct i2400ms *i2400ms,
269 const __le32 *barker, size_t barker_size)
270{
271 int ret;
272 struct sdio_func *func = i2400ms->func;
273 struct device *dev = &func->dev;
274 void *buffer;
275
276 ret = -ENOMEM;
277 buffer = kmalloc(I2400MS_BLK_SIZE, GFP_KERNEL);
278 if (buffer == NULL)
279 goto error_kzalloc;
280
281 memcpy(buffer, barker, barker_size);
282 sdio_claim_host(func);
283 ret = sdio_memcpy_toio(func, 0, buffer, I2400MS_BLK_SIZE);
284 sdio_release_host(func);
285
286 if (ret < 0)
287 d_printf(0, dev, "E: barker error: %d\n", ret);
288
289 kfree(buffer);
290error_kzalloc:
291 return ret;
292}
293
294
295/*
296 * Reset a device at different levels (warm, cold or bus)
297 *
298 * @i2400ms: device descriptor
299 * @reset_type: soft, warm or bus reset (I2400M_RT_WARM/SOFT/BUS)
300 *
301 * FIXME: not tested -- need to confirm expected effects
302 *
303 * Warm and cold resets get an SDIO reset if they fail (unimplemented)
304 *
305 * Warm reset:
306 *
307 * The device will be fully reset internally, but won't be
308 * disconnected from the bus (so no reenumeration will
309 * happen). Firmware upload will be necessary.
310 *
311 * The device will send a reboot barker that will trigger the driver
312 * to reinitialize the state via __i2400m_dev_reset_handle.
313 *
314 *
315 * Cold and bus reset:
316 *
317 * The device will be fully reset internally, disconnected from the
318 * bus an a reenumeration will happen. Firmware upload will be
319 * necessary. Thus, we don't do any locking or struct
320 * reinitialization, as we are going to be fully disconnected and
321 * reenumerated.
322 *
323 * Note we need to return -ENODEV if a warm reset was requested and we
324 * had to resort to a bus reset. See i2400m_op_reset(), wimax_reset()
325 * and wimax_dev->op_reset.
326 *
327 * WARNING: no driver state saved/fixed
328 */
329static
330int i2400ms_bus_reset(struct i2400m *i2400m, enum i2400m_reset_type rt)
331{
332 int result = 0;
333 struct i2400ms *i2400ms =
334 container_of(i2400m, struct i2400ms, i2400m);
335 struct device *dev = i2400m_dev(i2400m);
336 static const __le32 i2400m_WARM_BOOT_BARKER[4] = {
337 cpu_to_le32(I2400M_WARM_RESET_BARKER),
338 cpu_to_le32(I2400M_WARM_RESET_BARKER),
339 cpu_to_le32(I2400M_WARM_RESET_BARKER),
340 cpu_to_le32(I2400M_WARM_RESET_BARKER),
341 };
342 static const __le32 i2400m_COLD_BOOT_BARKER[4] = {
343 cpu_to_le32(I2400M_COLD_RESET_BARKER),
344 cpu_to_le32(I2400M_COLD_RESET_BARKER),
345 cpu_to_le32(I2400M_COLD_RESET_BARKER),
346 cpu_to_le32(I2400M_COLD_RESET_BARKER),
347 };
348
349 if (rt == I2400M_RT_WARM)
350 result = __i2400ms_send_barker(i2400ms, i2400m_WARM_BOOT_BARKER,
351 sizeof(i2400m_WARM_BOOT_BARKER));
352 else if (rt == I2400M_RT_COLD)
353 result = __i2400ms_send_barker(i2400ms, i2400m_COLD_BOOT_BARKER,
354 sizeof(i2400m_COLD_BOOT_BARKER));
355 else if (rt == I2400M_RT_BUS) {
356do_bus_reset:
357
358 i2400ms_bus_release(i2400m);
359
360 /* Wait for the device to settle */
361 msleep(40);
362
363 result = i2400ms_bus_setup(i2400m);
364 } else
365 BUG();
366 if (result < 0 && rt != I2400M_RT_BUS) {
367 dev_err(dev, "%s reset failed (%d); trying SDIO reset\n",
368 rt == I2400M_RT_WARM ? "warm" : "cold", result);
369 rt = I2400M_RT_BUS;
370 goto do_bus_reset;
371 }
372 return result;
373}
374
375
376static
377void i2400ms_netdev_setup(struct net_device *net_dev)
378{
379 struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
380 struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
381 i2400ms_init(i2400ms);
382 i2400m_netdev_setup(net_dev);
383}
384
385
386/*
387 * Debug levels control; see debug.h
388 */
389struct d_level D_LEVEL[] = {
390 D_SUBMODULE_DEFINE(main),
391 D_SUBMODULE_DEFINE(tx),
392 D_SUBMODULE_DEFINE(rx),
393 D_SUBMODULE_DEFINE(fw),
394};
395size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL);
396
397
398#define __debugfs_register(prefix, name, parent) \
399do { \
400 result = d_level_register_debugfs(prefix, name, parent); \
401 if (result < 0) \
402 goto error; \
403} while (0)
404
405
406static
407int i2400ms_debugfs_add(struct i2400ms *i2400ms)
408{
409 int result;
410 struct dentry *dentry = i2400ms->i2400m.wimax_dev.debugfs_dentry;
411
412 dentry = debugfs_create_dir("i2400m-sdio", dentry);
413 result = PTR_ERR(dentry);
414 if (IS_ERR(dentry)) {
415 if (result == -ENODEV)
416 result = 0; /* No debugfs support */
417 goto error;
418 }
419 i2400ms->debugfs_dentry = dentry;
420 __debugfs_register("dl_", main, dentry);
421 __debugfs_register("dl_", tx, dentry);
422 __debugfs_register("dl_", rx, dentry);
423 __debugfs_register("dl_", fw, dentry);
424
425 return 0;
426
427error:
428 debugfs_remove_recursive(i2400ms->debugfs_dentry);
429 i2400ms->debugfs_dentry = NULL;
430 return result;
431}
432
433
434static struct device_type i2400ms_type = {
435 .name = "wimax",
436};
437
438/*
439 * Probe a i2400m interface and register it
440 *
441 * @func: SDIO function
442 * @id: SDIO device ID
443 * @returns: 0 if ok, < 0 errno code on error.
444 *
445 * Alloc a net device, initialize the bus-specific details and then
446 * calls the bus-generic initialization routine. That will register
447 * the wimax and netdev devices, upload the firmware [using
448 * _bus_bm_*()], call _bus_dev_start() to finalize the setup of the
449 * communication with the device and then will start to talk to it to
450 * finnish setting it up.
451 *
452 * Initialization is tricky; some instances of the hw are packed with
453 * others in a way that requires a third driver that enables the WiMAX
454 * function. In those cases, we can't enable the SDIO function and
455 * we'll return with -ENODEV. When the driver that enables the WiMAX
456 * function does its thing, it has to do a bus_rescan_devices() on the
457 * SDIO bus so this driver is called again to enumerate the WiMAX
458 * function.
459 */
460static
461int i2400ms_probe(struct sdio_func *func,
462 const struct sdio_device_id *id)
463{
464 int result;
465 struct net_device *net_dev;
466 struct device *dev = &func->dev;
467 struct i2400m *i2400m;
468 struct i2400ms *i2400ms;
469
470 /* Allocate instance [calls i2400m_netdev_setup() on it]. */
471 result = -ENOMEM;
472 net_dev = alloc_netdev(sizeof(*i2400ms), "wmx%d",
473 i2400ms_netdev_setup);
474 if (net_dev == NULL) {
475 dev_err(dev, "no memory for network device instance\n");
476 goto error_alloc_netdev;
477 }
478 SET_NETDEV_DEV(net_dev, dev);
479 SET_NETDEV_DEVTYPE(net_dev, &i2400ms_type);
480 i2400m = net_dev_to_i2400m(net_dev);
481 i2400ms = container_of(i2400m, struct i2400ms, i2400m);
482 i2400m->wimax_dev.net_dev = net_dev;
483 i2400ms->func = func;
484 sdio_set_drvdata(func, i2400ms);
485
486 i2400m->bus_tx_block_size = I2400MS_BLK_SIZE;
487 /*
488 * Room required in the TX queue for SDIO message to accommodate
489 * a smallest payload while allocating header space is 224 bytes,
490 * which is the smallest message size(the block size 256 bytes)
491 * minus the smallest message header size(32 bytes).
492 */
493 i2400m->bus_tx_room_min = I2400MS_BLK_SIZE - I2400M_PL_ALIGN * 2;
494 i2400m->bus_pl_size_max = I2400MS_PL_SIZE_MAX;
495 i2400m->bus_setup = i2400ms_bus_setup;
496 i2400m->bus_dev_start = i2400ms_bus_dev_start;
497 i2400m->bus_dev_stop = NULL;
498 i2400m->bus_release = i2400ms_bus_release;
499 i2400m->bus_tx_kick = i2400ms_bus_tx_kick;
500 i2400m->bus_reset = i2400ms_bus_reset;
501 /* The iwmc3200-wimax sometimes requires the driver to try
502 * hard when we paint it into a corner. */
503 i2400m->bus_bm_retries = I2400M_SDIO_BOOT_RETRIES;
504 i2400m->bus_bm_cmd_send = i2400ms_bus_bm_cmd_send;
505 i2400m->bus_bm_wait_for_ack = i2400ms_bus_bm_wait_for_ack;
506 i2400m->bus_fw_names = i2400ms_bus_fw_names;
507 i2400m->bus_bm_mac_addr_impaired = 1;
508 i2400m->bus_bm_pokes_table = &i2400ms_pokes[0];
509
510 switch (func->device) {
511 case SDIO_DEVICE_ID_INTEL_IWMC3200WIMAX:
512 case SDIO_DEVICE_ID_INTEL_IWMC3200WIMAX_2G5:
513 i2400ms->iwmc3200 = 1;
514 break;
515 default:
516 i2400ms->iwmc3200 = 0;
517 }
518
519 result = i2400m_setup(i2400m, I2400M_BRI_NO_REBOOT);
520 if (result < 0) {
521 dev_err(dev, "cannot setup device: %d\n", result);
522 goto error_setup;
523 }
524
525 result = i2400ms_debugfs_add(i2400ms);
526 if (result < 0) {
527 dev_err(dev, "cannot create SDIO debugfs: %d\n",
528 result);
529 goto error_debugfs_add;
530 }
531 return 0;
532
533error_debugfs_add:
534 i2400m_release(i2400m);
535error_setup:
536 sdio_set_drvdata(func, NULL);
537 free_netdev(net_dev);
538error_alloc_netdev:
539 return result;
540}
541
542
543static
544void i2400ms_remove(struct sdio_func *func)
545{
546 struct device *dev = &func->dev;
547 struct i2400ms *i2400ms = sdio_get_drvdata(func);
548 struct i2400m *i2400m = &i2400ms->i2400m;
549 struct net_device *net_dev = i2400m->wimax_dev.net_dev;
550
551 d_fnstart(3, dev, "SDIO func %p\n", func);
552 debugfs_remove_recursive(i2400ms->debugfs_dentry);
553 i2400ms->debugfs_dentry = NULL;
554 i2400m_release(i2400m);
555 sdio_set_drvdata(func, NULL);
556 free_netdev(net_dev);
557 d_fnend(3, dev, "SDIO func %p\n", func);
558}
559
560static
561const struct sdio_device_id i2400ms_sdio_ids[] = {
562 /* Intel: i2400m WiMAX (iwmc3200) over SDIO */
563 { SDIO_DEVICE(SDIO_VENDOR_ID_INTEL,
564 SDIO_DEVICE_ID_INTEL_IWMC3200WIMAX) },
565 { SDIO_DEVICE(SDIO_VENDOR_ID_INTEL,
566 SDIO_DEVICE_ID_INTEL_IWMC3200WIMAX_2G5) },
567 { /* end: all zeroes */ },
568};
569MODULE_DEVICE_TABLE(sdio, i2400ms_sdio_ids);
570
571
572static
573struct sdio_driver i2400m_sdio_driver = {
574 .name = KBUILD_MODNAME,
575 .probe = i2400ms_probe,
576 .remove = i2400ms_remove,
577 .id_table = i2400ms_sdio_ids,
578};
579
580
581static
582int __init i2400ms_driver_init(void)
583{
584 d_parse_params(D_LEVEL, D_LEVEL_SIZE, i2400ms_debug_params,
585 "i2400m_sdio.debug");
586 return sdio_register_driver(&i2400m_sdio_driver);
587}
588module_init(i2400ms_driver_init);
589
590
591static
592void __exit i2400ms_driver_exit(void)
593{
594 sdio_unregister_driver(&i2400m_sdio_driver);
595}
596module_exit(i2400ms_driver_exit);
597
598
599MODULE_AUTHOR("Intel Corporation <linux-wimax@intel.com>");
600MODULE_DESCRIPTION("Intel 2400M WiMAX networking for SDIO");
601MODULE_LICENSE("GPL");
602MODULE_FIRMWARE(I2400MS_FW_FILE_NAME);
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-19 03:40:32 -0500