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1/*
2 * This file is provided under a dual BSD/GPLv2 license. When using or
3 * redistributing this file, you may do so under either license.
4 *
5 * GPL LICENSE SUMMARY
6 *
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * 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 St - Fifth Floor, Boston, MA 02110-1301 USA.
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
23 */
24
25/* probe_roms - scan for oem parameters */
26
27#include <linux/kernel.h>
28#include <linux/firmware.h>
29#include <linux/uaccess.h>
30#include <linux/efi.h>
31#include <asm/probe_roms.h>
32
33#include "isci.h"
34#include "task.h"
35#include "probe_roms.h"
36
37static efi_char16_t isci_efivar_name[] = {
38 'R', 's', 't', 'S', 'c', 'u', 'O'
39};
40
41struct isci_orom *isci_request_oprom(struct pci_dev *pdev)
42{
43 void __iomem *oprom = pci_map_biosrom(pdev);
44 struct isci_orom *rom = NULL;
45 size_t len, i;
46 int j;
47 char oem_sig[4];
48 struct isci_oem_hdr oem_hdr;
49 u8 *tmp, sum;
50
51 if (!oprom)
52 return NULL;
53
54 len = pci_biosrom_size(pdev);
55 rom = devm_kzalloc(&pdev->dev, sizeof(*rom), GFP_KERNEL);
56 if (!rom) {
57 pci_unmap_biosrom(oprom);
58 dev_warn(&pdev->dev,
59 "Unable to allocate memory for orom\n");
60 return NULL;
61 }
62
63 for (i = 0; i < len && rom; i += ISCI_OEM_SIG_SIZE) {
64 memcpy_fromio(oem_sig, oprom + i, ISCI_OEM_SIG_SIZE);
65
66 /* we think we found the OEM table */
67 if (memcmp(oem_sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) == 0) {
68 size_t copy_len;
69
70 memcpy_fromio(&oem_hdr, oprom + i, sizeof(oem_hdr));
71
72 copy_len = min(oem_hdr.len - sizeof(oem_hdr),
73 sizeof(*rom));
74
75 memcpy_fromio(rom,
76 oprom + i + sizeof(oem_hdr),
77 copy_len);
78
79 /* calculate checksum */
80 tmp = (u8 *)&oem_hdr;
81 for (j = 0, sum = 0; j < sizeof(oem_hdr); j++, tmp++)
82 sum += *tmp;
83
84 tmp = (u8 *)rom;
85 for (j = 0; j < sizeof(*rom); j++, tmp++)
86 sum += *tmp;
87
88 if (sum != 0) {
89 dev_warn(&pdev->dev,
90 "OEM table checksum failed\n");
91 continue;
92 }
93
94 /* keep going if that's not the oem param table */
95 if (memcmp(rom->hdr.signature,
96 ISCI_ROM_SIG,
97 ISCI_ROM_SIG_SIZE) != 0)
98 continue;
99
100 dev_info(&pdev->dev,
101 "OEM parameter table found in OROM\n");
102 break;
103 }
104 }
105
106 if (i >= len) {
107 dev_err(&pdev->dev, "oprom parse error\n");
108 rom = NULL;
109 }
110 pci_unmap_biosrom(oprom);
111
112 return rom;
113}
114
115struct isci_orom *isci_request_firmware(struct pci_dev *pdev, const struct firmware *fw)
116{
117 struct isci_orom *orom = NULL, *data;
118 int i, j;
119
120 if (request_firmware(&fw, ISCI_FW_NAME, &pdev->dev) != 0)
121 return NULL;
122
123 if (fw->size < sizeof(*orom))
124 goto out;
125
126 data = (struct isci_orom *)fw->data;
127
128 if (strncmp(ISCI_ROM_SIG, data->hdr.signature,
129 strlen(ISCI_ROM_SIG)) != 0)
130 goto out;
131
132 orom = devm_kzalloc(&pdev->dev, fw->size, GFP_KERNEL);
133 if (!orom)
134 goto out;
135
136 memcpy(orom, fw->data, fw->size);
137
138 if (is_c0(pdev) || is_c1(pdev))
139 goto out;
140
141 /*
142 * deprecated: override default amp_control for pre-preproduction
143 * silicon revisions
144 */
145 for (i = 0; i < ARRAY_SIZE(orom->ctrl); i++)
146 for (j = 0; j < ARRAY_SIZE(orom->ctrl[i].phys); j++) {
147 orom->ctrl[i].phys[j].afe_tx_amp_control0 = 0xe7c03;
148 orom->ctrl[i].phys[j].afe_tx_amp_control1 = 0xe7c03;
149 orom->ctrl[i].phys[j].afe_tx_amp_control2 = 0xe7c03;
150 orom->ctrl[i].phys[j].afe_tx_amp_control3 = 0xe7c03;
151 }
152 out:
153 release_firmware(fw);
154
155 return orom;
156}
157
158static struct efi *get_efi(void)
159{
160#ifdef CONFIG_EFI
161 return &efi;
162#else
163 return NULL;
164#endif
165}
166
167struct isci_orom *isci_get_efi_var(struct pci_dev *pdev)
168{
169 efi_status_t status;
170 struct isci_orom *rom;
171 struct isci_oem_hdr *oem_hdr;
172 u8 *tmp, sum;
173 int j;
174 unsigned long data_len;
175 u8 *efi_data;
176 u32 efi_attrib = 0;
177
178 data_len = 1024;
179 efi_data = devm_kzalloc(&pdev->dev, data_len, GFP_KERNEL);
180 if (!efi_data) {
181 dev_warn(&pdev->dev,
182 "Unable to allocate memory for EFI data\n");
183 return NULL;
184 }
185
186 rom = (struct isci_orom *)(efi_data + sizeof(struct isci_oem_hdr));
187
188 if (get_efi())
189 status = get_efi()->get_variable(isci_efivar_name,
190 &ISCI_EFI_VENDOR_GUID,
191 &efi_attrib,
192 &data_len,
193 efi_data);
194 else
195 status = EFI_NOT_FOUND;
196
197 if (status != EFI_SUCCESS) {
198 dev_warn(&pdev->dev,
199 "Unable to obtain EFI var data for OEM parms\n");
200 return NULL;
201 }
202
203 oem_hdr = (struct isci_oem_hdr *)efi_data;
204
205 if (memcmp(oem_hdr->sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) != 0) {
206 dev_warn(&pdev->dev,
207 "Invalid OEM header signature\n");
208 return NULL;
209 }
210
211 /* calculate checksum */
212 tmp = (u8 *)efi_data;
213 for (j = 0, sum = 0; j < (sizeof(*oem_hdr) + sizeof(*rom)); j++, tmp++)
214 sum += *tmp;
215
216 if (sum != 0) {
217 dev_warn(&pdev->dev,
218 "OEM table checksum failed\n");
219 return NULL;
220 }
221
222 if (memcmp(rom->hdr.signature,
223 ISCI_ROM_SIG,
224 ISCI_ROM_SIG_SIZE) != 0) {
225 dev_warn(&pdev->dev,
226 "Invalid OEM table signature\n");
227 return NULL;
228 }
229
230 return rom;
231}
1/*
2 * This file is provided under a dual BSD/GPLv2 license. When using or
3 * redistributing this file, you may do so under either license.
4 *
5 * GPL LICENSE SUMMARY
6 *
7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * 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 St - Fifth Floor, Boston, MA 02110-1301 USA.
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
23 */
24
25/* probe_roms - scan for oem parameters */
26
27#include <linux/kernel.h>
28#include <linux/firmware.h>
29#include <linux/uaccess.h>
30#include <linux/efi.h>
31#include <asm/probe_roms.h>
32
33#include "isci.h"
34#include "task.h"
35#include "probe_roms.h"
36
37static efi_char16_t isci_efivar_name[] = {
38 'R', 's', 't', 'S', 'c', 'u', 'O'
39};
40
41struct isci_orom *isci_request_oprom(struct pci_dev *pdev)
42{
43 void __iomem *oprom = pci_map_biosrom(pdev);
44 struct isci_orom *rom = NULL;
45 size_t len, i;
46 int j;
47 char oem_sig[4];
48 struct isci_oem_hdr oem_hdr;
49 u8 *tmp, sum;
50
51 if (!oprom)
52 return NULL;
53
54 len = pci_biosrom_size(pdev);
55 rom = devm_kzalloc(&pdev->dev, sizeof(*rom), GFP_KERNEL);
56 if (!rom) {
57 pci_unmap_biosrom(oprom);
58 dev_warn(&pdev->dev,
59 "Unable to allocate memory for orom\n");
60 return NULL;
61 }
62
63 for (i = 0; i < len && rom; i += ISCI_OEM_SIG_SIZE) {
64 memcpy_fromio(oem_sig, oprom + i, ISCI_OEM_SIG_SIZE);
65
66 /* we think we found the OEM table */
67 if (memcmp(oem_sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) == 0) {
68 size_t copy_len;
69
70 memcpy_fromio(&oem_hdr, oprom + i, sizeof(oem_hdr));
71
72 copy_len = min(oem_hdr.len - sizeof(oem_hdr),
73 sizeof(*rom));
74
75 memcpy_fromio(rom,
76 oprom + i + sizeof(oem_hdr),
77 copy_len);
78
79 /* calculate checksum */
80 tmp = (u8 *)&oem_hdr;
81 for (j = 0, sum = 0; j < sizeof(oem_hdr); j++, tmp++)
82 sum += *tmp;
83
84 tmp = (u8 *)rom;
85 for (j = 0; j < sizeof(*rom); j++, tmp++)
86 sum += *tmp;
87
88 if (sum != 0) {
89 dev_warn(&pdev->dev,
90 "OEM table checksum failed\n");
91 continue;
92 }
93
94 /* keep going if that's not the oem param table */
95 if (memcmp(rom->hdr.signature,
96 ISCI_ROM_SIG,
97 ISCI_ROM_SIG_SIZE) != 0)
98 continue;
99
100 dev_info(&pdev->dev,
101 "OEM parameter table found in OROM\n");
102 break;
103 }
104 }
105
106 if (i >= len) {
107 dev_err(&pdev->dev, "oprom parse error\n");
108 rom = NULL;
109 }
110 pci_unmap_biosrom(oprom);
111
112 return rom;
113}
114
115struct isci_orom *isci_request_firmware(struct pci_dev *pdev, const struct firmware *fw)
116{
117 struct isci_orom *orom = NULL, *data;
118 int i, j;
119
120 if (request_firmware(&fw, ISCI_FW_NAME, &pdev->dev) != 0)
121 return NULL;
122
123 if (fw->size < sizeof(*orom))
124 goto out;
125
126 data = (struct isci_orom *)fw->data;
127
128 if (strncmp(ISCI_ROM_SIG, data->hdr.signature,
129 strlen(ISCI_ROM_SIG)) != 0)
130 goto out;
131
132 orom = devm_kzalloc(&pdev->dev, fw->size, GFP_KERNEL);
133 if (!orom)
134 goto out;
135
136 memcpy(orom, fw->data, fw->size);
137
138 if (is_c0(pdev) || is_c1(pdev))
139 goto out;
140
141 /*
142 * deprecated: override default amp_control for pre-preproduction
143 * silicon revisions
144 */
145 for (i = 0; i < ARRAY_SIZE(orom->ctrl); i++)
146 for (j = 0; j < ARRAY_SIZE(orom->ctrl[i].phys); j++) {
147 orom->ctrl[i].phys[j].afe_tx_amp_control0 = 0xe7c03;
148 orom->ctrl[i].phys[j].afe_tx_amp_control1 = 0xe7c03;
149 orom->ctrl[i].phys[j].afe_tx_amp_control2 = 0xe7c03;
150 orom->ctrl[i].phys[j].afe_tx_amp_control3 = 0xe7c03;
151 }
152 out:
153 release_firmware(fw);
154
155 return orom;
156}
157
158static struct efi *get_efi(void)
159{
160#ifdef CONFIG_EFI
161 return &efi;
162#else
163 return NULL;
164#endif
165}
166
167struct isci_orom *isci_get_efi_var(struct pci_dev *pdev)
168{
169 efi_status_t status;
170 struct isci_orom *rom;
171 struct isci_oem_hdr *oem_hdr;
172 u8 *tmp, sum;
173 int j;
174 unsigned long data_len;
175 u8 *efi_data;
176 u32 efi_attrib = 0;
177
178 data_len = 1024;
179 efi_data = devm_kzalloc(&pdev->dev, data_len, GFP_KERNEL);
180 if (!efi_data) {
181 dev_warn(&pdev->dev,
182 "Unable to allocate memory for EFI data\n");
183 return NULL;
184 }
185
186 rom = (struct isci_orom *)(efi_data + sizeof(struct isci_oem_hdr));
187
188 if (get_efi())
189 status = get_efi()->get_variable(isci_efivar_name,
190 &ISCI_EFI_VENDOR_GUID,
191 &efi_attrib,
192 &data_len,
193 efi_data);
194 else
195 status = EFI_NOT_FOUND;
196
197 if (status != EFI_SUCCESS) {
198 dev_warn(&pdev->dev,
199 "Unable to obtain EFI var data for OEM parms\n");
200 return NULL;
201 }
202
203 oem_hdr = (struct isci_oem_hdr *)efi_data;
204
205 if (memcmp(oem_hdr->sig, ISCI_OEM_SIG, ISCI_OEM_SIG_SIZE) != 0) {
206 dev_warn(&pdev->dev,
207 "Invalid OEM header signature\n");
208 return NULL;
209 }
210
211 /* calculate checksum */
212 tmp = (u8 *)efi_data;
213 for (j = 0, sum = 0; j < (sizeof(*oem_hdr) + sizeof(*rom)); j++, tmp++)
214 sum += *tmp;
215
216 if (sum != 0) {
217 dev_warn(&pdev->dev,
218 "OEM table checksum failed\n");
219 return NULL;
220 }
221
222 if (memcmp(rom->hdr.signature,
223 ISCI_ROM_SIG,
224 ISCI_ROM_SIG_SIZE) != 0) {
225 dev_warn(&pdev->dev,
226 "Invalid OEM table signature\n");
227 return NULL;
228 }
229
230 return rom;
231}