2 * ---------------------------------------------------------------------------
6 * Implements the f/w related HIP core lib API.
7 * It is part of the porting exercise in Linux.
9 * Also, it contains example code for reading the loader and f/w files
10 * from the userspace and starting the SME in Linux.
12 * Copyright (C) 2005-2009 by Cambridge Silicon Radio Ltd.
14 * Refer to LICENSE.txt included with this source code for details on
17 * ---------------------------------------------------------------------------
19 #include <linux/kmod.h>
20 #include <linux/vmalloc.h>
21 #include <linux/firmware.h>
22 #include <asm/uaccess.h>
23 #include "csr_wifi_hip_unifi.h"
24 #include "csr_wifi_hip_unifi_udi.h"
26 #include "unifi_priv.h"
29 * ---------------------------------------------------------------------------
31 * F/W download. Part of the HIP core API
33 * ---------------------------------------------------------------------------
38 * ---------------------------------------------------------------------------
41 * Returns a structure to be passed in unifi_fw_read().
42 * This structure is an OS specific description of the f/w file.
43 * In the linux implementation it is a buffer with the f/w and its' length.
44 * The HIP driver calls this functions to request for the loader or
46 * The structure pointer can be freed when unifi_fw_read_stop() is called.
49 * ospriv Pointer to driver context.
50 * is_fw Type of firmware to retrieve
51 * info Versions information. Can be used to determine
52 * the appropriate f/w file to load.
55 * O on success, non-zero otherwise.
57 * ---------------------------------------------------------------------------
60 unifi_fw_read_start(void *ospriv, s8 is_fw, const card_info_t *info)
62 unifi_priv_t *priv = (unifi_priv_t*)ospriv;
67 if (is_fw == UNIFI_FW_STA) {
68 /* F/w may have been released after a previous successful download. */
69 if (priv->fw_sta.dl_data == NULL) {
70 unifi_trace(priv, UDBG2, "Attempt reload of sta f/w\n");
71 uf_request_firmware_files(priv, UNIFI_FW_STA);
73 /* Set up callback struct for readfunc() */
74 if (priv->fw_sta.dl_data != NULL) {
80 unifi_error(priv, "downloading firmware... unknown request: %d\n", is_fw);
85 } /* unifi_fw_read_start() */
90 * ---------------------------------------------------------------------------
93 * Called when the HIP driver has finished using the loader or
95 * The firmware buffer may be released now.
98 * ospriv Pointer to driver context.
99 * dlpriv The pointer returned by unifi_fw_read_start()
101 * ---------------------------------------------------------------------------
104 unifi_fw_read_stop(void *ospriv, void *dlpriv)
106 unifi_priv_t *priv = (unifi_priv_t*)ospriv;
107 struct dlpriv *dl_struct = (struct dlpriv *)dlpriv;
110 if (dl_struct != NULL) {
111 if (dl_struct->dl_data != NULL) {
112 unifi_trace(priv, UDBG2, "Release f/w buffer %p, %d bytes\n",
113 dl_struct->dl_data, dl_struct->dl_len);
115 uf_release_firmware(priv, dl_struct);
119 } /* unifi_fw_read_stop() */
123 * ---------------------------------------------------------------------------
124 * unifi_fw_open_buffer
126 * Returns a handle for a buffer dynamically allocated by the driver,
127 * e.g. into which a firmware file may have been converted from another format
128 * which is the case with some production test images.
130 * The handle may then be used by unifi_fw_read() to access the contents of
134 * ospriv Pointer to driver context.
135 * fwbuf Buffer containing firmware image
136 * len Length of buffer in bytes
139 * Handle for buffer, or NULL on error
140 * ---------------------------------------------------------------------------
143 unifi_fw_open_buffer(void *ospriv, void *fwbuf, u32 len)
145 unifi_priv_t *priv = (unifi_priv_t*)ospriv;
152 priv->fw_conv.dl_data = fwbuf;
153 priv->fw_conv.dl_len = len;
154 priv->fw_conv.fw_desc = NULL; /* No OS f/w resource is associated */
157 return &priv->fw_conv;
161 * ---------------------------------------------------------------------------
162 * unifi_fw_close_buffer
164 * Releases any handle for a buffer dynamically allocated by the driver,
165 * e.g. into which a firmware file may have been converted from another format
166 * which is the case with some production test images.
170 * ospriv Pointer to driver context.
171 * fwbuf Buffer containing firmware image
174 * Handle for buffer, or NULL on error
175 * ---------------------------------------------------------------------------
177 void unifi_fw_close_buffer(void *ospriv, void *fwbuf)
182 * ---------------------------------------------------------------------------
185 * The HIP driver calls this function to ask for a part of the loader or
189 * ospriv Pointer to driver context.
190 * arg The pointer returned by unifi_fw_read_start().
191 * offset The offset in the file to return from.
192 * buf A buffer to store the requested data.
193 * len The size of the buf and the size of the requested data.
196 * The number of bytes read from the firmware image, or -ve on error
197 * ---------------------------------------------------------------------------
200 unifi_fw_read(void *ospriv, void *arg, u32 offset, void *buf, u32 len)
202 const struct dlpriv *dlpriv = arg;
204 if (offset >= dlpriv->dl_len) {
209 if ((offset + len) > dlpriv->dl_len) {
210 /* attempt to read past end of file */
214 memcpy(buf, dlpriv->dl_data+offset, len);
218 } /* unifi_fw_read() */
223 #define UNIFIHELPER_INIT_MODE_SMEUSER 2
224 #define UNIFIHELPER_INIT_MODE_NATIVE 1
227 * ---------------------------------------------------------------------------
230 * Ask userspace to send us firmware for download by running
231 * '/usr/sbin/unififw'.
232 * The same script starts the SME userspace application.
233 * Derived from net_run_sbin_hotplug().
236 * priv Pointer to OS private struct.
240 * ---------------------------------------------------------------------------
243 uf_run_unifihelper(unifi_priv_t *priv)
245 #ifdef CONFIG_HOTPLUG
248 char *prog = "/system/bin/unififw";
250 char *prog = "/usr/sbin/unififw";
251 #endif /* ANDROID_BUILD */
253 char *argv[6], *envp[4];
258 #if (defined CSR_SME_USERSPACE) && (!defined CSR_SUPPORT_WEXT)
259 unifi_trace(priv, UDBG1, "SME userspace build: run unifi_helper manually\n");
263 unifi_trace(priv, UDBG1, "starting %s\n", prog);
265 snprintf(inst_str, 8, "%d", priv->instance);
266 #if (defined CSR_SME_USERSPACE)
267 snprintf(init_mode, 8, "%d", UNIFIHELPER_INIT_MODE_SMEUSER);
269 snprintf(init_mode, 8, "%d", UNIFIHELPER_INIT_MODE_NATIVE);
270 #endif /* CSR_SME_USERSPACE */
274 argv[i++] = inst_str;
275 argv[i++] = init_mode;
278 /* Don't add more args without making argv bigger */
280 /* minimal command environment */
282 envp[i++] = "HOME=/";
283 envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
285 /* Don't add more without making envp bigger */
287 unifi_trace(priv, UDBG2, "running %s %s %s\n", argv[0], argv[1], argv[2]);
289 r = call_usermodehelper(argv[0], argv, envp, 0);
293 unifi_trace(priv, UDBG1, "Can't automatically download firmware because kernel does not have HOTPLUG\n");
296 } /* uf_run_unifihelper() */
298 #ifdef CSR_WIFI_SPLIT_PATCH
299 static u8 is_ap_mode(unifi_priv_t *priv)
301 if (priv == NULL || priv->interfacePriv[0] == NULL)
306 /* Test for mode requiring AP patch */
307 return(CSR_WIFI_HIP_IS_AP_FW(priv->interfacePriv[0]->interfaceMode));
312 * ---------------------------------------------------------------------------
313 * uf_request_firmware_files
315 * Get the firmware files from userspace.
318 * priv Pointer to OS private struct.
319 * is_fw type of firmware to load (UNIFI_FW_STA/LOADER)
323 * ---------------------------------------------------------------------------
325 int uf_request_firmware_files(unifi_priv_t *priv, int is_fw)
327 /* uses the default method to get the firmware */
328 const struct firmware *fw_entry;
330 #define UNIFI_MAX_FW_PATH_LEN 32
331 char fw_name[UNIFI_MAX_FW_PATH_LEN];
334 #if (defined CSR_SUPPORT_SME) && (defined CSR_SUPPORT_WEXT)
335 if (priv->mib_data.length) {
336 vfree(priv->mib_data.data);
337 priv->mib_data.data = NULL;
338 priv->mib_data.length = 0;
340 #endif /* CSR_SUPPORT_SME && CSR_SUPPORT_WEXT*/
342 postfix = priv->instance;
344 if (is_fw == UNIFI_FW_STA) {
345 /* Free kernel buffer and reload */
346 uf_release_firmware(priv, &priv->fw_sta);
347 #ifdef CSR_WIFI_SPLIT_PATCH
348 scnprintf(fw_name, UNIFI_MAX_FW_PATH_LEN, "unifi-sdio-%d/%s",
349 postfix, (is_ap_mode(priv) ? "ap.xbv" : "staonly.xbv") );
351 scnprintf(fw_name, UNIFI_MAX_FW_PATH_LEN, "unifi-sdio-%d/%s",
352 postfix, "sta.xbv" );
354 r = request_firmware(&fw_entry, fw_name, priv->unifi_device);
356 priv->fw_sta.dl_data = fw_entry->data;
357 priv->fw_sta.dl_len = fw_entry->size;
358 priv->fw_sta.fw_desc = (void *)fw_entry;
360 unifi_trace(priv, UDBG2, "Firmware file not available\n");
366 } /* uf_request_firmware_files() */
369 * ---------------------------------------------------------------------------
370 * uf_release_firmware_files
372 * Release all buffers used to store firmware files
375 * priv Pointer to OS private struct.
379 * ---------------------------------------------------------------------------
381 int uf_release_firmware_files(unifi_priv_t *priv)
383 uf_release_firmware(priv, &priv->fw_sta);
389 * ---------------------------------------------------------------------------
390 * uf_release_firmware
392 * Release specific buffer used to store firmware
395 * priv Pointer to OS private struct.
396 * to_free Pointer to specific buffer to release
400 * ---------------------------------------------------------------------------
402 int uf_release_firmware(unifi_priv_t *priv, struct dlpriv *to_free)
404 if (to_free != NULL) {
405 if (to_free->fw_desc != NULL) {
406 release_firmware((const struct firmware *)to_free->fw_desc);
408 to_free->fw_desc = NULL;
409 to_free->dl_data = NULL;