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path: root/drivers/net/caif/caif_shm_u5500.c
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Diffstat (limited to 'drivers/net/caif/caif_shm_u5500.c')
-rw-r--r--drivers/net/caif/caif_shm_u5500.c128
1 files changed, 0 insertions, 128 deletions
diff --git a/drivers/net/caif/caif_shm_u5500.c b/drivers/net/caif/caif_shm_u5500.c
deleted file mode 100644
index 89d76b7b325a..000000000000
--- a/drivers/net/caif/caif_shm_u5500.c
+++ /dev/null
@@ -1,128 +0,0 @@
1/*
2 * Copyright (C) ST-Ericsson AB 2010
3 * Contact: Sjur Brendeland / sjur.brandeland@stericsson.com
4 * Author: Amarnath Revanna / amarnath.bangalore.revanna@stericsson.com
5 * License terms: GNU General Public License (GPL) version 2
6 */
7
8#define pr_fmt(fmt) KBUILD_MODNAME ":" fmt
9
10#include <linux/init.h>
11#include <linux/module.h>
12#include <linux/netdevice.h>
13#include <mach/mbox-db5500.h>
14#include <net/caif/caif_shm.h>
15
16MODULE_LICENSE("GPL");
17MODULE_DESCRIPTION("CAIF Shared Memory protocol driver");
18
19#define MAX_SHM_INSTANCES 1
20
21enum {
22 MBX_ACC0,
23 MBX_ACC1,
24 MBX_DSP
25};
26
27static struct shmdev_layer shmdev_lyr[MAX_SHM_INSTANCES];
28
29static unsigned int shm_start;
30static unsigned int shm_size;
31
32module_param(shm_size, uint , 0440);
33MODULE_PARM_DESC(shm_total_size, "Start of SHM shared memory");
34
35module_param(shm_start, uint , 0440);
36MODULE_PARM_DESC(shm_total_start, "Total Size of SHM shared memory");
37
38static int shmdev_send_msg(u32 dev_id, u32 mbx_msg)
39{
40 /* Always block until msg is written successfully */
41 mbox_send(shmdev_lyr[dev_id].hmbx, mbx_msg, true);
42 return 0;
43}
44
45static int shmdev_mbx_setup(void *pshmdrv_cb, struct shmdev_layer *pshm_dev,
46 void *pshm_drv)
47{
48 /*
49 * For UX5500, we have only 1 SHM instance which uses MBX0
50 * for communication with the peer modem
51 */
52 pshm_dev->hmbx = mbox_setup(MBX_ACC0, pshmdrv_cb, pshm_drv);
53
54 if (!pshm_dev->hmbx)
55 return -ENODEV;
56 else
57 return 0;
58}
59
60static int __init caif_shmdev_init(void)
61{
62 int i, result;
63
64 /* Loop is currently overkill, there is only one instance */
65 for (i = 0; i < MAX_SHM_INSTANCES; i++) {
66
67 shmdev_lyr[i].shm_base_addr = shm_start;
68 shmdev_lyr[i].shm_total_sz = shm_size;
69
70 if (((char *)shmdev_lyr[i].shm_base_addr == NULL)
71 || (shmdev_lyr[i].shm_total_sz <= 0)) {
72 pr_warn("ERROR,"
73 "Shared memory Address and/or Size incorrect"
74 ", Bailing out ...\n");
75 result = -EINVAL;
76 goto clean;
77 }
78
79 pr_info("SHM AREA (instance %d) STARTS"
80 " AT %p\n", i, (char *)shmdev_lyr[i].shm_base_addr);
81
82 shmdev_lyr[i].shm_id = i;
83 shmdev_lyr[i].pshmdev_mbxsend = shmdev_send_msg;
84 shmdev_lyr[i].pshmdev_mbxsetup = shmdev_mbx_setup;
85
86 /*
87 * Finally, CAIF core module is called with details in place:
88 * 1. SHM base address
89 * 2. SHM size
90 * 3. MBX handle
91 */
92 result = caif_shmcore_probe(&shmdev_lyr[i]);
93 if (result) {
94 pr_warn("ERROR[%d],"
95 "Could not probe SHM core (instance %d)"
96 " Bailing out ...\n", result, i);
97 goto clean;
98 }
99 }
100
101 return 0;
102
103clean:
104 /*
105 * For now, we assume that even if one instance of SHM fails, we bail
106 * out of the driver support completely. For this, we need to release
107 * any memory allocated and unregister any instance of SHM net device.
108 */
109 for (i = 0; i < MAX_SHM_INSTANCES; i++) {
110 if (shmdev_lyr[i].pshm_netdev)
111 unregister_netdev(shmdev_lyr[i].pshm_netdev);
112 }
113 return result;
114}
115
116static void __exit caif_shmdev_exit(void)
117{
118 int i;
119
120 for (i = 0; i < MAX_SHM_INSTANCES; i++) {
121 caif_shmcore_remove(shmdev_lyr[i].pshm_netdev);
122 kfree((void *)shmdev_lyr[i].shm_base_addr);
123 }
124
125}
126
127module_init(caif_shmdev_init);
128module_exit(caif_shmdev_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-02 17:33:19 -0500