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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / misc / pch_phub.c
blob10fc4785dba7dd65330a7008db87a4423a0bedd5
1 /*
2 * Copyright (C) 2011 LAPIS Semiconductor Co., Ltd.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
16 */
17
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/types.h>
21 #include <linux/fs.h>
22 #include <linux/uaccess.h>
23 #include <linux/string.h>
24 #include <linux/pci.h>
25 #include <linux/io.h>
26 #include <linux/delay.h>
27 #include <linux/mutex.h>
28 #include <linux/if_ether.h>
29 #include <linux/ctype.h>
30 #include <linux/dmi.h>
31
32 #define PHUB_STATUS 0x00 /* Status Register offset */
33 #define PHUB_CONTROL 0x04 /* Control Register offset */
34 #define PHUB_TIMEOUT 0x05 /* Time out value for Status Register */
35 #define PCH_PHUB_ROM_WRITE_ENABLE 0x01 /* Enabling for writing ROM */
36 #define PCH_PHUB_ROM_WRITE_DISABLE 0x00 /* Disabling for writing ROM */
37 #define PCH_PHUB_MAC_START_ADDR_EG20T 0x14 /* MAC data area start address
38 offset */
39 #define PCH_PHUB_MAC_START_ADDR_ML7223 0x20C /* MAC data area start address
40 offset */
41 #define PCH_PHUB_ROM_START_ADDR_EG20T 0x80 /* ROM data area start address offset
42 (Intel EG20T PCH)*/
43 #define PCH_PHUB_ROM_START_ADDR_ML7213 0x400 /* ROM data area start address
44 offset(LAPIS Semicon ML7213)
45 */
46 #define PCH_PHUB_ROM_START_ADDR_ML7223 0x400 /* ROM data area start address
47 offset(LAPIS Semicon ML7223)
48 */
49
50 /* MAX number of INT_REDUCE_CONTROL registers */
51 #define MAX_NUM_INT_REDUCE_CONTROL_REG 128
52 #define PCI_DEVICE_ID_PCH1_PHUB 0x8801
53 #define PCH_MINOR_NOS 1
54 #define CLKCFG_CAN_50MHZ 0x12000000
55 #define CLKCFG_CANCLK_MASK 0xFF000000
56 #define CLKCFG_UART_MASK 0xFFFFFF
57
58 /* CM-iTC */
59 #define CLKCFG_UART_48MHZ (1 << 16)
60 #define CLKCFG_BAUDDIV (2 << 20)
61 #define CLKCFG_PLL2VCO (8 << 9)
62 #define CLKCFG_UARTCLKSEL (1 << 18)
63
64 /* Macros for ML7213 */
65 #define PCI_VENDOR_ID_ROHM 0x10db
66 #define PCI_DEVICE_ID_ROHM_ML7213_PHUB 0x801A
67
68 /* Macros for ML7213 */
69 #define PCI_VENDOR_ID_ROHM 0x10db
70 #define PCI_DEVICE_ID_ROHM_ML7213_PHUB 0x801A
71
72 /* Macros for ML7223 */
73 #define PCI_DEVICE_ID_ROHM_ML7223_mPHUB 0x8012 /* for Bus-m */
74 #define PCI_DEVICE_ID_ROHM_ML7223_nPHUB 0x8002 /* for Bus-n */
75
76 /* Macros for ML7831 */
77 #define PCI_DEVICE_ID_ROHM_ML7831_PHUB 0x8801
78
79 /* SROM ACCESS Macro */
80 #define PCH_WORD_ADDR_MASK (~((1 << 2) - 1))
81
82 /* Registers address offset */
83 #define PCH_PHUB_ID_REG 0x0000
84 #define PCH_PHUB_QUEUE_PRI_VAL_REG 0x0004
85 #define PCH_PHUB_RC_QUEUE_MAXSIZE_REG 0x0008
86 #define PCH_PHUB_BRI_QUEUE_MAXSIZE_REG 0x000C
87 #define PCH_PHUB_COMP_RESP_TIMEOUT_REG 0x0010
88 #define PCH_PHUB_BUS_SLAVE_CONTROL_REG 0x0014
89 #define PCH_PHUB_DEADLOCK_AVOID_TYPE_REG 0x0018
90 #define PCH_PHUB_INTPIN_REG_WPERMIT_REG0 0x0020
91 #define PCH_PHUB_INTPIN_REG_WPERMIT_REG1 0x0024
92 #define PCH_PHUB_INTPIN_REG_WPERMIT_REG2 0x0028
93 #define PCH_PHUB_INTPIN_REG_WPERMIT_REG3 0x002C
94 #define PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE 0x0040
95 #define CLKCFG_REG_OFFSET 0x500
96 #define FUNCSEL_REG_OFFSET 0x508
97
98 #define PCH_PHUB_OROM_SIZE 15360
99
100 /**
101 * struct pch_phub_reg - PHUB register structure
102 * @phub_id_reg: PHUB_ID register val
103 * @q_pri_val_reg: QUEUE_PRI_VAL register val
104 * @rc_q_maxsize_reg: RC_QUEUE_MAXSIZE register val
105 * @bri_q_maxsize_reg: BRI_QUEUE_MAXSIZE register val
106 * @comp_resp_timeout_reg: COMP_RESP_TIMEOUT register val
107 * @bus_slave_control_reg: BUS_SLAVE_CONTROL_REG register val
108 * @deadlock_avoid_type_reg: DEADLOCK_AVOID_TYPE register val
109 * @intpin_reg_wpermit_reg0: INTPIN_REG_WPERMIT register 0 val
110 * @intpin_reg_wpermit_reg1: INTPIN_REG_WPERMIT register 1 val
111 * @intpin_reg_wpermit_reg2: INTPIN_REG_WPERMIT register 2 val
112 * @intpin_reg_wpermit_reg3: INTPIN_REG_WPERMIT register 3 val
113 * @int_reduce_control_reg: INT_REDUCE_CONTROL registers val
114 * @clkcfg_reg: CLK CFG register val
115 * @funcsel_reg: Function select register value
116 * @pch_phub_base_address: Register base address
117 * @pch_phub_extrom_base_address: external rom base address
118 * @pch_mac_start_address: MAC address area start address
119 * @pch_opt_rom_start_address: Option ROM start address
120 * @ioh_type: Save IOH type
121 * @pdev: pointer to pci device struct
122 */
123 struct pch_phub_reg {
124 u32 phub_id_reg;
125 u32 q_pri_val_reg;
126 u32 rc_q_maxsize_reg;
127 u32 bri_q_maxsize_reg;
128 u32 comp_resp_timeout_reg;
129 u32 bus_slave_control_reg;
130 u32 deadlock_avoid_type_reg;
131 u32 intpin_reg_wpermit_reg0;
132 u32 intpin_reg_wpermit_reg1;
133 u32 intpin_reg_wpermit_reg2;
134 u32 intpin_reg_wpermit_reg3;
135 u32 int_reduce_control_reg[MAX_NUM_INT_REDUCE_CONTROL_REG];
136 u32 clkcfg_reg;
137 u32 funcsel_reg;
138 void __iomem *pch_phub_base_address;
139 void __iomem *pch_phub_extrom_base_address;
140 u32 pch_mac_start_address;
141 u32 pch_opt_rom_start_address;
142 int ioh_type;
143 struct pci_dev *pdev;
144 };
145
146 /* SROM SPEC for MAC address assignment offset */
147 static const int pch_phub_mac_offset[ETH_ALEN] = {0x3, 0x2, 0x1, 0x0, 0xb, 0xa};
148
149 static DEFINE_MUTEX(pch_phub_mutex);
150
151 /**
152 * pch_phub_read_modify_write_reg() - Reading modifying and writing register
153 * @reg_addr_offset: Register offset address value.
154 * @data: Writing value.
155 * @mask: Mask value.
156 */
157 static void pch_phub_read_modify_write_reg(struct pch_phub_reg *chip,
158 unsigned int reg_addr_offset,
159 unsigned int data, unsigned int mask)
160 {
161 void __iomem *reg_addr = chip->pch_phub_base_address + reg_addr_offset;
162 iowrite32(((ioread32(reg_addr) & ~mask)) | data, reg_addr);
163 }
164
165 /* pch_phub_save_reg_conf - saves register configuration */
166 static void pch_phub_save_reg_conf(struct pci_dev *pdev)
167 {
168 unsigned int i;
169 struct pch_phub_reg *chip = pci_get_drvdata(pdev);
170
171 void __iomem *p = chip->pch_phub_base_address;
172
173 chip->phub_id_reg = ioread32(p + PCH_PHUB_ID_REG);
174 chip->q_pri_val_reg = ioread32(p + PCH_PHUB_QUEUE_PRI_VAL_REG);
175 chip->rc_q_maxsize_reg = ioread32(p + PCH_PHUB_RC_QUEUE_MAXSIZE_REG);
176 chip->bri_q_maxsize_reg = ioread32(p + PCH_PHUB_BRI_QUEUE_MAXSIZE_REG);
177 chip->comp_resp_timeout_reg =
178 ioread32(p + PCH_PHUB_COMP_RESP_TIMEOUT_REG);
179 chip->bus_slave_control_reg =
180 ioread32(p + PCH_PHUB_BUS_SLAVE_CONTROL_REG);
181 chip->deadlock_avoid_type_reg =
182 ioread32(p + PCH_PHUB_DEADLOCK_AVOID_TYPE_REG);
183 chip->intpin_reg_wpermit_reg0 =
184 ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG0);
185 chip->intpin_reg_wpermit_reg1 =
186 ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG1);
187 chip->intpin_reg_wpermit_reg2 =
188 ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG2);
189 chip->intpin_reg_wpermit_reg3 =
190 ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG3);
191 dev_dbg(&pdev->dev, "%s : "
192 "chip->phub_id_reg=%x, "
193 "chip->q_pri_val_reg=%x, "
194 "chip->rc_q_maxsize_reg=%x, "
195 "chip->bri_q_maxsize_reg=%x, "
196 "chip->comp_resp_timeout_reg=%x, "
197 "chip->bus_slave_control_reg=%x, "
198 "chip->deadlock_avoid_type_reg=%x, "
199 "chip->intpin_reg_wpermit_reg0=%x, "
200 "chip->intpin_reg_wpermit_reg1=%x, "
201 "chip->intpin_reg_wpermit_reg2=%x, "
202 "chip->intpin_reg_wpermit_reg3=%x\n", __func__,
203 chip->phub_id_reg,
204 chip->q_pri_val_reg,
205 chip->rc_q_maxsize_reg,
206 chip->bri_q_maxsize_reg,
207 chip->comp_resp_timeout_reg,
208 chip->bus_slave_control_reg,
209 chip->deadlock_avoid_type_reg,
210 chip->intpin_reg_wpermit_reg0,
211 chip->intpin_reg_wpermit_reg1,
212 chip->intpin_reg_wpermit_reg2,
213 chip->intpin_reg_wpermit_reg3);
214 for (i = 0; i < MAX_NUM_INT_REDUCE_CONTROL_REG; i++) {
215 chip->int_reduce_control_reg[i] =
216 ioread32(p + PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE + 4 * i);
217 dev_dbg(&pdev->dev, "%s : "
218 "chip->int_reduce_control_reg[%d]=%x\n",
219 __func__, i, chip->int_reduce_control_reg[i]);
220 }
221 chip->clkcfg_reg = ioread32(p + CLKCFG_REG_OFFSET);
222 if ((chip->ioh_type == 2) || (chip->ioh_type == 4))
223 chip->funcsel_reg = ioread32(p + FUNCSEL_REG_OFFSET);
224 }
225
226 /* pch_phub_restore_reg_conf - restore register configuration */
227 static void pch_phub_restore_reg_conf(struct pci_dev *pdev)
228 {
229 unsigned int i;
230 struct pch_phub_reg *chip = pci_get_drvdata(pdev);
231 void __iomem *p;
232 p = chip->pch_phub_base_address;
233
234 iowrite32(chip->phub_id_reg, p + PCH_PHUB_ID_REG);
235 iowrite32(chip->q_pri_val_reg, p + PCH_PHUB_QUEUE_PRI_VAL_REG);
236 iowrite32(chip->rc_q_maxsize_reg, p + PCH_PHUB_RC_QUEUE_MAXSIZE_REG);
237 iowrite32(chip->bri_q_maxsize_reg, p + PCH_PHUB_BRI_QUEUE_MAXSIZE_REG);
238 iowrite32(chip->comp_resp_timeout_reg,
239 p + PCH_PHUB_COMP_RESP_TIMEOUT_REG);
240 iowrite32(chip->bus_slave_control_reg,
241 p + PCH_PHUB_BUS_SLAVE_CONTROL_REG);
242 iowrite32(chip->deadlock_avoid_type_reg,
243 p + PCH_PHUB_DEADLOCK_AVOID_TYPE_REG);
244 iowrite32(chip->intpin_reg_wpermit_reg0,
245 p + PCH_PHUB_INTPIN_REG_WPERMIT_REG0);
246 iowrite32(chip->intpin_reg_wpermit_reg1,
247 p + PCH_PHUB_INTPIN_REG_WPERMIT_REG1);
248 iowrite32(chip->intpin_reg_wpermit_reg2,
249 p + PCH_PHUB_INTPIN_REG_WPERMIT_REG2);
250 iowrite32(chip->intpin_reg_wpermit_reg3,
251 p + PCH_PHUB_INTPIN_REG_WPERMIT_REG3);
252 dev_dbg(&pdev->dev, "%s : "
253 "chip->phub_id_reg=%x, "
254 "chip->q_pri_val_reg=%x, "
255 "chip->rc_q_maxsize_reg=%x, "
256 "chip->bri_q_maxsize_reg=%x, "
257 "chip->comp_resp_timeout_reg=%x, "
258 "chip->bus_slave_control_reg=%x, "
259 "chip->deadlock_avoid_type_reg=%x, "
260 "chip->intpin_reg_wpermit_reg0=%x, "
261 "chip->intpin_reg_wpermit_reg1=%x, "
262 "chip->intpin_reg_wpermit_reg2=%x, "
263 "chip->intpin_reg_wpermit_reg3=%x\n", __func__,
264 chip->phub_id_reg,
265 chip->q_pri_val_reg,
266 chip->rc_q_maxsize_reg,
267 chip->bri_q_maxsize_reg,
268 chip->comp_resp_timeout_reg,
269 chip->bus_slave_control_reg,
270 chip->deadlock_avoid_type_reg,
271 chip->intpin_reg_wpermit_reg0,
272 chip->intpin_reg_wpermit_reg1,
273 chip->intpin_reg_wpermit_reg2,
274 chip->intpin_reg_wpermit_reg3);
275 for (i = 0; i < MAX_NUM_INT_REDUCE_CONTROL_REG; i++) {
276 iowrite32(chip->int_reduce_control_reg[i],
277 p + PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE + 4 * i);
278 dev_dbg(&pdev->dev, "%s : "
279 "chip->int_reduce_control_reg[%d]=%x\n",
280 __func__, i, chip->int_reduce_control_reg[i]);
281 }
282
283 iowrite32(chip->clkcfg_reg, p + CLKCFG_REG_OFFSET);
284 if ((chip->ioh_type == 2) || (chip->ioh_type == 4))
285 iowrite32(chip->funcsel_reg, p + FUNCSEL_REG_OFFSET);
286 }
287
288 /**
289 * pch_phub_read_serial_rom() - Reading Serial ROM
290 * @offset_address: Serial ROM offset address to read.
291 * @data: Read buffer for specified Serial ROM value.
292 */
293 static void pch_phub_read_serial_rom(struct pch_phub_reg *chip,
294 unsigned int offset_address, u8 *data)
295 {
296 void __iomem *mem_addr = chip->pch_phub_extrom_base_address +
297 offset_address;
298
299 *data = ioread8(mem_addr);
300 }
301
302 /**
303 * pch_phub_write_serial_rom() - Writing Serial ROM
304 * @offset_address: Serial ROM offset address.
305 * @data: Serial ROM value to write.
306 */
307 static int pch_phub_write_serial_rom(struct pch_phub_reg *chip,
308 unsigned int offset_address, u8 data)
309 {
310 void __iomem *mem_addr = chip->pch_phub_extrom_base_address +
311 (offset_address & PCH_WORD_ADDR_MASK);
312 int i;
313 unsigned int word_data;
314 unsigned int pos;
315 unsigned int mask;
316 pos = (offset_address % 4) * 8;
317 mask = ~(0xFF << pos);
318
319 iowrite32(PCH_PHUB_ROM_WRITE_ENABLE,
320 chip->pch_phub_extrom_base_address + PHUB_CONTROL);
321
322 word_data = ioread32(mem_addr);
323 iowrite32((word_data & mask) | (u32)data << pos, mem_addr);
324
325 i = 0;
326 while (ioread8(chip->pch_phub_extrom_base_address +
327 PHUB_STATUS) != 0x00) {
328 msleep(1);
329 if (i == PHUB_TIMEOUT)
330 return -ETIMEDOUT;
331 i++;
332 }
333
334 iowrite32(PCH_PHUB_ROM_WRITE_DISABLE,
335 chip->pch_phub_extrom_base_address + PHUB_CONTROL);
336
337 return 0;
338 }
339
340 /**
341 * pch_phub_read_serial_rom_val() - Read Serial ROM value
342 * @offset_address: Serial ROM address offset value.
343 * @data: Serial ROM value to read.
344 */
345 static void pch_phub_read_serial_rom_val(struct pch_phub_reg *chip,
346 unsigned int offset_address, u8 *data)
347 {
348 unsigned int mem_addr;
349
350 mem_addr = chip->pch_mac_start_address +
351 pch_phub_mac_offset[offset_address];
352
353 pch_phub_read_serial_rom(chip, mem_addr, data);
354 }
355
356 /**
357 * pch_phub_write_serial_rom_val() - writing Serial ROM value
358 * @offset_address: Serial ROM address offset value.
359 * @data: Serial ROM value.
360 */
361 static int pch_phub_write_serial_rom_val(struct pch_phub_reg *chip,
362 unsigned int offset_address, u8 data)
363 {
364 int retval;
365 unsigned int mem_addr;
366
367 mem_addr = chip->pch_mac_start_address +
368 pch_phub_mac_offset[offset_address];
369
370 retval = pch_phub_write_serial_rom(chip, mem_addr, data);
371
372 return retval;
373 }
374
375 /* pch_phub_gbe_serial_rom_conf - makes Serial ROM header format configuration
376 * for Gigabit Ethernet MAC address
377 */
378 static int pch_phub_gbe_serial_rom_conf(struct pch_phub_reg *chip)
379 {
380 int retval;
381
382 retval = pch_phub_write_serial_rom(chip, 0x0b, 0xbc);
383 retval |= pch_phub_write_serial_rom(chip, 0x0a, 0x10);
384 retval |= pch_phub_write_serial_rom(chip, 0x09, 0x01);
385 retval |= pch_phub_write_serial_rom(chip, 0x08, 0x02);
386
387 retval |= pch_phub_write_serial_rom(chip, 0x0f, 0x00);
388 retval |= pch_phub_write_serial_rom(chip, 0x0e, 0x00);
389 retval |= pch_phub_write_serial_rom(chip, 0x0d, 0x00);
390 retval |= pch_phub_write_serial_rom(chip, 0x0c, 0x80);
391
392 retval |= pch_phub_write_serial_rom(chip, 0x13, 0xbc);
393 retval |= pch_phub_write_serial_rom(chip, 0x12, 0x10);
394 retval |= pch_phub_write_serial_rom(chip, 0x11, 0x01);
395 retval |= pch_phub_write_serial_rom(chip, 0x10, 0x18);
396
397 retval |= pch_phub_write_serial_rom(chip, 0x1b, 0xbc);
398 retval |= pch_phub_write_serial_rom(chip, 0x1a, 0x10);
399 retval |= pch_phub_write_serial_rom(chip, 0x19, 0x01);
400 retval |= pch_phub_write_serial_rom(chip, 0x18, 0x19);
401
402 retval |= pch_phub_write_serial_rom(chip, 0x23, 0xbc);
403 retval |= pch_phub_write_serial_rom(chip, 0x22, 0x10);
404 retval |= pch_phub_write_serial_rom(chip, 0x21, 0x01);
405 retval |= pch_phub_write_serial_rom(chip, 0x20, 0x3a);
406
407 retval |= pch_phub_write_serial_rom(chip, 0x27, 0x01);
408 retval |= pch_phub_write_serial_rom(chip, 0x26, 0x00);
409 retval |= pch_phub_write_serial_rom(chip, 0x25, 0x00);
410 retval |= pch_phub_write_serial_rom(chip, 0x24, 0x00);
411
412 return retval;
413 }
414
415 /* pch_phub_gbe_serial_rom_conf_mp - makes SerialROM header format configuration
416 * for Gigabit Ethernet MAC address
417 */
418 static int pch_phub_gbe_serial_rom_conf_mp(struct pch_phub_reg *chip)
419 {
420 int retval;
421 u32 offset_addr;
422
423 offset_addr = 0x200;
424 retval = pch_phub_write_serial_rom(chip, 0x03 + offset_addr, 0xbc);
425 retval |= pch_phub_write_serial_rom(chip, 0x02 + offset_addr, 0x00);
426 retval |= pch_phub_write_serial_rom(chip, 0x01 + offset_addr, 0x40);
427 retval |= pch_phub_write_serial_rom(chip, 0x00 + offset_addr, 0x02);
428
429 retval |= pch_phub_write_serial_rom(chip, 0x07 + offset_addr, 0x00);
430 retval |= pch_phub_write_serial_rom(chip, 0x06 + offset_addr, 0x00);
431 retval |= pch_phub_write_serial_rom(chip, 0x05 + offset_addr, 0x00);
432 retval |= pch_phub_write_serial_rom(chip, 0x04 + offset_addr, 0x80);
433
434 retval |= pch_phub_write_serial_rom(chip, 0x0b + offset_addr, 0xbc);
435 retval |= pch_phub_write_serial_rom(chip, 0x0a + offset_addr, 0x00);
436 retval |= pch_phub_write_serial_rom(chip, 0x09 + offset_addr, 0x40);
437 retval |= pch_phub_write_serial_rom(chip, 0x08 + offset_addr, 0x18);
438
439 retval |= pch_phub_write_serial_rom(chip, 0x13 + offset_addr, 0xbc);
440 retval |= pch_phub_write_serial_rom(chip, 0x12 + offset_addr, 0x00);
441 retval |= pch_phub_write_serial_rom(chip, 0x11 + offset_addr, 0x40);
442 retval |= pch_phub_write_serial_rom(chip, 0x10 + offset_addr, 0x19);
443
444 retval |= pch_phub_write_serial_rom(chip, 0x1b + offset_addr, 0xbc);
445 retval |= pch_phub_write_serial_rom(chip, 0x1a + offset_addr, 0x00);
446 retval |= pch_phub_write_serial_rom(chip, 0x19 + offset_addr, 0x40);
447 retval |= pch_phub_write_serial_rom(chip, 0x18 + offset_addr, 0x3a);
448
449 retval |= pch_phub_write_serial_rom(chip, 0x1f + offset_addr, 0x01);
450 retval |= pch_phub_write_serial_rom(chip, 0x1e + offset_addr, 0x00);
451 retval |= pch_phub_write_serial_rom(chip, 0x1d + offset_addr, 0x00);
452 retval |= pch_phub_write_serial_rom(chip, 0x1c + offset_addr, 0x00);
453
454 return retval;
455 }
456
457 /**
458 * pch_phub_read_gbe_mac_addr() - Read Gigabit Ethernet MAC address
459 * @offset_address: Gigabit Ethernet MAC address offset value.
460 * @data: Buffer of the Gigabit Ethernet MAC address value.
461 */
462 static void pch_phub_read_gbe_mac_addr(struct pch_phub_reg *chip, u8 *data)
463 {
464 int i;
465 for (i = 0; i < ETH_ALEN; i++)
466 pch_phub_read_serial_rom_val(chip, i, &data[i]);
467 }
468
469 /**
470 * pch_phub_write_gbe_mac_addr() - Write MAC address
471 * @offset_address: Gigabit Ethernet MAC address offset value.
472 * @data: Gigabit Ethernet MAC address value.
473 */
474 static int pch_phub_write_gbe_mac_addr(struct pch_phub_reg *chip, u8 *data)
475 {
476 int retval;
477 int i;
478
479 if ((chip->ioh_type == 1) || (chip->ioh_type == 5)) /* EG20T or ML7831*/
480 retval = pch_phub_gbe_serial_rom_conf(chip);
481 else /* ML7223 */
482 retval = pch_phub_gbe_serial_rom_conf_mp(chip);
483 if (retval)
484 return retval;
485
486 for (i = 0; i < ETH_ALEN; i++) {
487 retval = pch_phub_write_serial_rom_val(chip, i, data[i]);
488 if (retval)
489 return retval;
490 }
491
492 return retval;
493 }
494
495 static ssize_t pch_phub_bin_read(struct file *filp, struct kobject *kobj,
496 struct bin_attribute *attr, char *buf,
497 loff_t off, size_t count)
498 {
499 unsigned int rom_signature;
500 unsigned char rom_length;
501 unsigned int tmp;
502 unsigned int addr_offset;
503 unsigned int orom_size;
504 int ret;
505 int err;
506 ssize_t rom_size;
507
508 struct pch_phub_reg *chip =
509 dev_get_drvdata(container_of(kobj, struct device, kobj));
510
511 ret = mutex_lock_interruptible(&pch_phub_mutex);
512 if (ret) {
513 err = -ERESTARTSYS;
514 goto return_err_nomutex;
515 }
516
517 /* Get Rom signature */
518 chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
519 if (!chip->pch_phub_extrom_base_address)
520 goto exrom_map_err;
521
522 pch_phub_read_serial_rom(chip, chip->pch_opt_rom_start_address,
523 (unsigned char *)&rom_signature);
524 rom_signature &= 0xff;
525 pch_phub_read_serial_rom(chip, chip->pch_opt_rom_start_address + 1,
526 (unsigned char *)&tmp);
527 rom_signature |= (tmp & 0xff) << 8;
528 if (rom_signature == 0xAA55) {
529 pch_phub_read_serial_rom(chip,
530 chip->pch_opt_rom_start_address + 2,
531 &rom_length);
532 orom_size = rom_length * 512;
533 if (orom_size < off) {
534 addr_offset = 0;
535 goto return_ok;
536 }
537 if (orom_size < count) {
538 addr_offset = 0;
539 goto return_ok;
540 }
541
542 for (addr_offset = 0; addr_offset < count; addr_offset++) {
543 pch_phub_read_serial_rom(chip,
544 chip->pch_opt_rom_start_address + addr_offset + off,
545 &buf[addr_offset]);
546 }
547 } else {
548 err = -ENODATA;
549 goto return_err;
550 }
551 return_ok:
552 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
553 mutex_unlock(&pch_phub_mutex);
554 return addr_offset;
555
556 return_err:
557 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
558 exrom_map_err:
559 mutex_unlock(&pch_phub_mutex);
560 return_err_nomutex:
561 return err;
562 }
563
564 static ssize_t pch_phub_bin_write(struct file *filp, struct kobject *kobj,
565 struct bin_attribute *attr,
566 char *buf, loff_t off, size_t count)
567 {
568 int err;
569 unsigned int addr_offset;
570 int ret;
571 ssize_t rom_size;
572 struct pch_phub_reg *chip =
573 dev_get_drvdata(container_of(kobj, struct device, kobj));
574
575 ret = mutex_lock_interruptible(&pch_phub_mutex);
576 if (ret)
577 return -ERESTARTSYS;
578
579 if (off > PCH_PHUB_OROM_SIZE) {
580 addr_offset = 0;
581 goto return_ok;
582 }
583 if (count > PCH_PHUB_OROM_SIZE) {
584 addr_offset = 0;
585 goto return_ok;
586 }
587
588 chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
589 if (!chip->pch_phub_extrom_base_address) {
590 err = -ENOMEM;
591 goto exrom_map_err;
592 }
593
594 for (addr_offset = 0; addr_offset < count; addr_offset++) {
595 if (PCH_PHUB_OROM_SIZE < off + addr_offset)
596 goto return_ok;
597
598 ret = pch_phub_write_serial_rom(chip,
599 chip->pch_opt_rom_start_address + addr_offset + off,
600 buf[addr_offset]);
601 if (ret) {
602 err = ret;
603 goto return_err;
604 }
605 }
606
607 return_ok:
608 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
609 mutex_unlock(&pch_phub_mutex);
610 return addr_offset;
611
612 return_err:
613 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
614
615 exrom_map_err:
616 mutex_unlock(&pch_phub_mutex);
617 return err;
618 }
619
620 static ssize_t show_pch_mac(struct device *dev, struct device_attribute *attr,
621 char *buf)
622 {
623 u8 mac[8];
624 struct pch_phub_reg *chip = dev_get_drvdata(dev);
625 ssize_t rom_size;
626
627 chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
628 if (!chip->pch_phub_extrom_base_address)
629 return -ENOMEM;
630
631 pch_phub_read_gbe_mac_addr(chip, mac);
632 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
633
634 return sprintf(buf, "%pM\n", mac);
635 }
636
637 static ssize_t store_pch_mac(struct device *dev, struct device_attribute *attr,
638 const char *buf, size_t count)
639 {
640 u8 mac[6];
641 ssize_t rom_size;
642 struct pch_phub_reg *chip = dev_get_drvdata(dev);
643
644 if (count != 18)
645 return -EINVAL;
646
647 sscanf(buf, "%02x:%02x:%02x:%02x:%02x:%02x",
648 (u32 *)&mac[0], (u32 *)&mac[1], (u32 *)&mac[2], (u32 *)&mac[3],
649 (u32 *)&mac[4], (u32 *)&mac[5]);
650
651 chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
652 if (!chip->pch_phub_extrom_base_address)
653 return -ENOMEM;
654
655 pch_phub_write_gbe_mac_addr(chip, mac);
656 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
657
658 return count;
659 }
660
661 static DEVICE_ATTR(pch_mac, S_IRUGO | S_IWUSR, show_pch_mac, store_pch_mac);
662
663 static struct bin_attribute pch_bin_attr = {
664 .attr = {
665 .name = "pch_firmware",
666 .mode = S_IRUGO | S_IWUSR,
667 },
668 .size = PCH_PHUB_OROM_SIZE + 1,
669 .read = pch_phub_bin_read,
670 .write = pch_phub_bin_write,
671 };
672
673 static int __devinit pch_phub_probe(struct pci_dev *pdev,
674 const struct pci_device_id *id)
675 {
676 int retval;
677
678 int ret;
679 struct pch_phub_reg *chip;
680
681 chip = kzalloc(sizeof(struct pch_phub_reg), GFP_KERNEL);
682 if (chip == NULL)
683 return -ENOMEM;
684
685 ret = pci_enable_device(pdev);
686 if (ret) {
687 dev_err(&pdev->dev,
688 "%s : pci_enable_device FAILED(ret=%d)", __func__, ret);
689 goto err_pci_enable_dev;
690 }
691 dev_dbg(&pdev->dev, "%s : pci_enable_device returns %d\n", __func__,
692 ret);
693
694 ret = pci_request_regions(pdev, KBUILD_MODNAME);
695 if (ret) {
696 dev_err(&pdev->dev,
697 "%s : pci_request_regions FAILED(ret=%d)", __func__, ret);
698 goto err_req_regions;
699 }
700 dev_dbg(&pdev->dev, "%s : "
701 "pci_request_regions returns %d\n", __func__, ret);
702
703 chip->pch_phub_base_address = pci_iomap(pdev, 1, 0);
704
705
706 if (chip->pch_phub_base_address == 0) {
707 dev_err(&pdev->dev, "%s : pci_iomap FAILED", __func__);
708 ret = -ENOMEM;
709 goto err_pci_iomap;
710 }
711 dev_dbg(&pdev->dev, "%s : pci_iomap SUCCESS and value "
712 "in pch_phub_base_address variable is %p\n", __func__,
713 chip->pch_phub_base_address);
714
715 chip->pdev = pdev; /* Save pci device struct */
716
717 if (id->driver_data == 1) { /* EG20T PCH */
718 const char *board_name;
719
720 retval = sysfs_create_file(&pdev->dev.kobj,
721 &dev_attr_pch_mac.attr);
722 if (retval)
723 goto err_sysfs_create;
724
725 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
726 if (retval)
727 goto exit_bin_attr;
728
729 pch_phub_read_modify_write_reg(chip,
730 (unsigned int)CLKCFG_REG_OFFSET,
731 CLKCFG_CAN_50MHZ,
732 CLKCFG_CANCLK_MASK);
733
734 /* quirk for CM-iTC board */
735 board_name = dmi_get_system_info(DMI_BOARD_NAME);
736 if (board_name && strstr(board_name, "CM-iTC"))
737 pch_phub_read_modify_write_reg(chip,
738 (unsigned int)CLKCFG_REG_OFFSET,
739 CLKCFG_UART_48MHZ | CLKCFG_BAUDDIV |
740 CLKCFG_PLL2VCO | CLKCFG_UARTCLKSEL,
741 CLKCFG_UART_MASK);
742
743 /* set the prefech value */
744 iowrite32(0x000affaa, chip->pch_phub_base_address + 0x14);
745 /* set the interrupt delay value */
746 iowrite32(0x25, chip->pch_phub_base_address + 0x44);
747 chip->pch_opt_rom_start_address = PCH_PHUB_ROM_START_ADDR_EG20T;
748 chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_EG20T;
749 } else if (id->driver_data == 2) { /* ML7213 IOH */
750 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
751 if (retval)
752 goto err_sysfs_create;
753 /* set the prefech value
754 * Device2(USB OHCI #1/ USB EHCI #1/ USB Device):a
755 * Device4(SDIO #0,1,2):f
756 * Device6(SATA 2):f
757 * Device8(USB OHCI #0/ USB EHCI #0):a
758 */
759 iowrite32(0x000affa0, chip->pch_phub_base_address + 0x14);
760 chip->pch_opt_rom_start_address =\
761 PCH_PHUB_ROM_START_ADDR_ML7213;
762 } else if (id->driver_data == 3) { /* ML7223 IOH Bus-m*/
763 /* set the prefech value
764 * Device8(GbE)
765 */
766 iowrite32(0x000a0000, chip->pch_phub_base_address + 0x14);
767 /* set the interrupt delay value */
768 iowrite32(0x25, chip->pch_phub_base_address + 0x140);
769 chip->pch_opt_rom_start_address =\
770 PCH_PHUB_ROM_START_ADDR_ML7223;
771 chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_ML7223;
772 } else if (id->driver_data == 4) { /* ML7223 IOH Bus-n*/
773 retval = sysfs_create_file(&pdev->dev.kobj,
774 &dev_attr_pch_mac.attr);
775 if (retval)
776 goto err_sysfs_create;
777 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
778 if (retval)
779 goto exit_bin_attr;
780 /* set the prefech value
781 * Device2(USB OHCI #0,1,2,3/ USB EHCI #0):a
782 * Device4(SDIO #0,1):f
783 * Device6(SATA 2):f
784 */
785 iowrite32(0x0000ffa0, chip->pch_phub_base_address + 0x14);
786 chip->pch_opt_rom_start_address =\
787 PCH_PHUB_ROM_START_ADDR_ML7223;
788 chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_ML7223;
789 } else if (id->driver_data == 5) { /* ML7831 */
790 retval = sysfs_create_file(&pdev->dev.kobj,
791 &dev_attr_pch_mac.attr);
792 if (retval)
793 goto err_sysfs_create;
794
795 retval = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
796 if (retval)
797 goto exit_bin_attr;
798
799 /* set the prefech value */
800 iowrite32(0x000affaa, chip->pch_phub_base_address + 0x14);
801 /* set the interrupt delay value */
802 iowrite32(0x25, chip->pch_phub_base_address + 0x44);
803 chip->pch_opt_rom_start_address = PCH_PHUB_ROM_START_ADDR_EG20T;
804 chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_EG20T;
805 }
806
807 chip->ioh_type = id->driver_data;
808 pci_set_drvdata(pdev, chip);
809
810 return 0;
811 exit_bin_attr:
812 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_pch_mac.attr);
813
814 err_sysfs_create:
815 pci_iounmap(pdev, chip->pch_phub_base_address);
816 err_pci_iomap:
817 pci_release_regions(pdev);
818 err_req_regions:
819 pci_disable_device(pdev);
820 err_pci_enable_dev:
821 kfree(chip);
822 dev_err(&pdev->dev, "%s returns %d\n", __func__, ret);
823 return ret;
824 }
825
826 static void __devexit pch_phub_remove(struct pci_dev *pdev)
827 {
828 struct pch_phub_reg *chip = pci_get_drvdata(pdev);
829
830 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_pch_mac.attr);
831 sysfs_remove_bin_file(&pdev->dev.kobj, &pch_bin_attr);
832 pci_iounmap(pdev, chip->pch_phub_base_address);
833 pci_release_regions(pdev);
834 pci_disable_device(pdev);
835 kfree(chip);
836 }
837
838 #ifdef CONFIG_PM
839
840 static int pch_phub_suspend(struct pci_dev *pdev, pm_message_t state)
841 {
842 int ret;
843
844 pch_phub_save_reg_conf(pdev);
845 ret = pci_save_state(pdev);
846 if (ret) {
847 dev_err(&pdev->dev,
848 " %s -pci_save_state returns %d\n", __func__, ret);
849 return ret;
850 }
851 pci_enable_wake(pdev, PCI_D3hot, 0);
852 pci_disable_device(pdev);
853 pci_set_power_state(pdev, pci_choose_state(pdev, state));
854
855 return 0;
856 }
857
858 static int pch_phub_resume(struct pci_dev *pdev)
859 {
860 int ret;
861
862 pci_set_power_state(pdev, PCI_D0);
863 pci_restore_state(pdev);
864 ret = pci_enable_device(pdev);
865 if (ret) {
866 dev_err(&pdev->dev,
867 "%s-pci_enable_device failed(ret=%d) ", __func__, ret);
868 return ret;
869 }
870
871 pci_enable_wake(pdev, PCI_D3hot, 0);
872 pch_phub_restore_reg_conf(pdev);
873
874 return 0;
875 }
876 #else
877 #define pch_phub_suspend NULL
878 #define pch_phub_resume NULL
879 #endif /* CONFIG_PM */
880
881 static struct pci_device_id pch_phub_pcidev_id[] = {
882 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PCH1_PHUB), 1, },
883 { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7213_PHUB), 2, },
884 { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7223_mPHUB), 3, },
885 { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7223_nPHUB), 4, },
886 { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7831_PHUB), 5, },
887 { }
888 };
889 MODULE_DEVICE_TABLE(pci, pch_phub_pcidev_id);
890
891 static struct pci_driver pch_phub_driver = {
892 .name = "pch_phub",
893 .id_table = pch_phub_pcidev_id,
894 .probe = pch_phub_probe,
895 .remove = __devexit_p(pch_phub_remove),
896 .suspend = pch_phub_suspend,
897 .resume = pch_phub_resume
898 };
899
900 static int __init pch_phub_pci_init(void)
901 {
902 return pci_register_driver(&pch_phub_driver);
903 }
904
905 static void __exit pch_phub_pci_exit(void)
906 {
907 pci_unregister_driver(&pch_phub_driver);
908 }
909
910 module_init(pch_phub_pci_init);
911 module_exit(pch_phub_pci_exit);
912
913 MODULE_DESCRIPTION("Intel EG20T PCH/LAPIS Semiconductor IOH(ML7213/ML7223) PHUB");
914 MODULE_LICENSE("GPL");