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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / misc / pch_phub.c
blob60828af7506a3a539d8b8b88d3594a63170d4bcc
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2011 LAPIS Semiconductor Co., Ltd.
4 */
5
6 #include <linux/module.h>
7 #include <linux/kernel.h>
8 #include <linux/types.h>
9 #include <linux/fs.h>
10 #include <linux/uaccess.h>
11 #include <linux/string.h>
12 #include <linux/pci.h>
13 #include <linux/io.h>
14 #include <linux/delay.h>
15 #include <linux/mutex.h>
16 #include <linux/if_ether.h>
17 #include <linux/ctype.h>
18 #include <linux/dmi.h>
19 #include <linux/of.h>
20
21 #define PHUB_STATUS 0x00 /* Status Register offset */
22 #define PHUB_CONTROL 0x04 /* Control Register offset */
23 #define PHUB_TIMEOUT 0x05 /* Time out value for Status Register */
24 #define PCH_PHUB_ROM_WRITE_ENABLE 0x01 /* Enabling for writing ROM */
25 #define PCH_PHUB_ROM_WRITE_DISABLE 0x00 /* Disabling for writing ROM */
26 #define PCH_PHUB_MAC_START_ADDR_EG20T 0x14 /* MAC data area start address
27 offset */
28 #define PCH_PHUB_MAC_START_ADDR_ML7223 0x20C /* MAC data area start address
29 offset */
30 #define PCH_PHUB_ROM_START_ADDR_EG20T 0x80 /* ROM data area start address offset
31 (Intel EG20T PCH)*/
32 #define PCH_PHUB_ROM_START_ADDR_ML7213 0x400 /* ROM data area start address
33 offset(LAPIS Semicon ML7213)
34 */
35 #define PCH_PHUB_ROM_START_ADDR_ML7223 0x400 /* ROM data area start address
36 offset(LAPIS Semicon ML7223)
37 */
38
39 /* MAX number of INT_REDUCE_CONTROL registers */
40 #define MAX_NUM_INT_REDUCE_CONTROL_REG 128
41 #define PCI_DEVICE_ID_PCH1_PHUB 0x8801
42 #define PCH_MINOR_NOS 1
43 #define CLKCFG_CAN_50MHZ 0x12000000
44 #define CLKCFG_CANCLK_MASK 0xFF000000
45 #define CLKCFG_UART_MASK 0xFFFFFF
46
47 /* CM-iTC */
48 #define CLKCFG_UART_48MHZ (1 << 16)
49 #define CLKCFG_UART_25MHZ (2 << 16)
50 #define CLKCFG_BAUDDIV (2 << 20)
51 #define CLKCFG_PLL2VCO (8 << 9)
52 #define CLKCFG_UARTCLKSEL (1 << 18)
53
54 /* Macros for ML7213 */
55 #define PCI_DEVICE_ID_ROHM_ML7213_PHUB 0x801A
56
57 /* Macros for ML7223 */
58 #define PCI_DEVICE_ID_ROHM_ML7223_mPHUB 0x8012 /* for Bus-m */
59 #define PCI_DEVICE_ID_ROHM_ML7223_nPHUB 0x8002 /* for Bus-n */
60
61 /* Macros for ML7831 */
62 #define PCI_DEVICE_ID_ROHM_ML7831_PHUB 0x8801
63
64 /* SROM ACCESS Macro */
65 #define PCH_WORD_ADDR_MASK (~((1 << 2) - 1))
66
67 /* Registers address offset */
68 #define PCH_PHUB_ID_REG 0x0000
69 #define PCH_PHUB_QUEUE_PRI_VAL_REG 0x0004
70 #define PCH_PHUB_RC_QUEUE_MAXSIZE_REG 0x0008
71 #define PCH_PHUB_BRI_QUEUE_MAXSIZE_REG 0x000C
72 #define PCH_PHUB_COMP_RESP_TIMEOUT_REG 0x0010
73 #define PCH_PHUB_BUS_SLAVE_CONTROL_REG 0x0014
74 #define PCH_PHUB_DEADLOCK_AVOID_TYPE_REG 0x0018
75 #define PCH_PHUB_INTPIN_REG_WPERMIT_REG0 0x0020
76 #define PCH_PHUB_INTPIN_REG_WPERMIT_REG1 0x0024
77 #define PCH_PHUB_INTPIN_REG_WPERMIT_REG2 0x0028
78 #define PCH_PHUB_INTPIN_REG_WPERMIT_REG3 0x002C
79 #define PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE 0x0040
80 #define CLKCFG_REG_OFFSET 0x500
81 #define FUNCSEL_REG_OFFSET 0x508
82
83 #define PCH_PHUB_OROM_SIZE 15360
84
85 /**
86 * struct pch_phub_reg - PHUB register structure
87 * @phub_id_reg: PHUB_ID register val
88 * @q_pri_val_reg: QUEUE_PRI_VAL register val
89 * @rc_q_maxsize_reg: RC_QUEUE_MAXSIZE register val
90 * @bri_q_maxsize_reg: BRI_QUEUE_MAXSIZE register val
91 * @comp_resp_timeout_reg: COMP_RESP_TIMEOUT register val
92 * @bus_slave_control_reg: BUS_SLAVE_CONTROL_REG register val
93 * @deadlock_avoid_type_reg: DEADLOCK_AVOID_TYPE register val
94 * @intpin_reg_wpermit_reg0: INTPIN_REG_WPERMIT register 0 val
95 * @intpin_reg_wpermit_reg1: INTPIN_REG_WPERMIT register 1 val
96 * @intpin_reg_wpermit_reg2: INTPIN_REG_WPERMIT register 2 val
97 * @intpin_reg_wpermit_reg3: INTPIN_REG_WPERMIT register 3 val
98 * @int_reduce_control_reg: INT_REDUCE_CONTROL registers val
99 * @clkcfg_reg: CLK CFG register val
100 * @funcsel_reg: Function select register value
101 * @pch_phub_base_address: Register base address
102 * @pch_phub_extrom_base_address: external rom base address
103 * @pch_mac_start_address: MAC address area start address
104 * @pch_opt_rom_start_address: Option ROM start address
105 * @ioh_type: Save IOH type
106 * @pdev: pointer to pci device struct
107 */
108 struct pch_phub_reg {
109 u32 phub_id_reg;
110 u32 q_pri_val_reg;
111 u32 rc_q_maxsize_reg;
112 u32 bri_q_maxsize_reg;
113 u32 comp_resp_timeout_reg;
114 u32 bus_slave_control_reg;
115 u32 deadlock_avoid_type_reg;
116 u32 intpin_reg_wpermit_reg0;
117 u32 intpin_reg_wpermit_reg1;
118 u32 intpin_reg_wpermit_reg2;
119 u32 intpin_reg_wpermit_reg3;
120 u32 int_reduce_control_reg[MAX_NUM_INT_REDUCE_CONTROL_REG];
121 u32 clkcfg_reg;
122 u32 funcsel_reg;
123 void __iomem *pch_phub_base_address;
124 void __iomem *pch_phub_extrom_base_address;
125 u32 pch_mac_start_address;
126 u32 pch_opt_rom_start_address;
127 int ioh_type;
128 struct pci_dev *pdev;
129 };
130
131 /* SROM SPEC for MAC address assignment offset */
132 static const int pch_phub_mac_offset[ETH_ALEN] = {0x3, 0x2, 0x1, 0x0, 0xb, 0xa};
133
134 static DEFINE_MUTEX(pch_phub_mutex);
135
136 /**
137 * pch_phub_read_modify_write_reg() - Reading modifying and writing register
138 * @reg_addr_offset: Register offset address value.
139 * @data: Writing value.
140 * @mask: Mask value.
141 */
142 static void pch_phub_read_modify_write_reg(struct pch_phub_reg *chip,
143 unsigned int reg_addr_offset,
144 unsigned int data, unsigned int mask)
145 {
146 void __iomem *reg_addr = chip->pch_phub_base_address + reg_addr_offset;
147 iowrite32(((ioread32(reg_addr) & ~mask)) | data, reg_addr);
148 }
149
150 #ifdef CONFIG_PM
151 /* pch_phub_save_reg_conf - saves register configuration */
152 static void pch_phub_save_reg_conf(struct pci_dev *pdev)
153 {
154 unsigned int i;
155 struct pch_phub_reg *chip = pci_get_drvdata(pdev);
156
157 void __iomem *p = chip->pch_phub_base_address;
158
159 chip->phub_id_reg = ioread32(p + PCH_PHUB_ID_REG);
160 chip->q_pri_val_reg = ioread32(p + PCH_PHUB_QUEUE_PRI_VAL_REG);
161 chip->rc_q_maxsize_reg = ioread32(p + PCH_PHUB_RC_QUEUE_MAXSIZE_REG);
162 chip->bri_q_maxsize_reg = ioread32(p + PCH_PHUB_BRI_QUEUE_MAXSIZE_REG);
163 chip->comp_resp_timeout_reg =
164 ioread32(p + PCH_PHUB_COMP_RESP_TIMEOUT_REG);
165 chip->bus_slave_control_reg =
166 ioread32(p + PCH_PHUB_BUS_SLAVE_CONTROL_REG);
167 chip->deadlock_avoid_type_reg =
168 ioread32(p + PCH_PHUB_DEADLOCK_AVOID_TYPE_REG);
169 chip->intpin_reg_wpermit_reg0 =
170 ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG0);
171 chip->intpin_reg_wpermit_reg1 =
172 ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG1);
173 chip->intpin_reg_wpermit_reg2 =
174 ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG2);
175 chip->intpin_reg_wpermit_reg3 =
176 ioread32(p + PCH_PHUB_INTPIN_REG_WPERMIT_REG3);
177 dev_dbg(&pdev->dev, "%s : "
178 "chip->phub_id_reg=%x, "
179 "chip->q_pri_val_reg=%x, "
180 "chip->rc_q_maxsize_reg=%x, "
181 "chip->bri_q_maxsize_reg=%x, "
182 "chip->comp_resp_timeout_reg=%x, "
183 "chip->bus_slave_control_reg=%x, "
184 "chip->deadlock_avoid_type_reg=%x, "
185 "chip->intpin_reg_wpermit_reg0=%x, "
186 "chip->intpin_reg_wpermit_reg1=%x, "
187 "chip->intpin_reg_wpermit_reg2=%x, "
188 "chip->intpin_reg_wpermit_reg3=%x\n", __func__,
189 chip->phub_id_reg,
190 chip->q_pri_val_reg,
191 chip->rc_q_maxsize_reg,
192 chip->bri_q_maxsize_reg,
193 chip->comp_resp_timeout_reg,
194 chip->bus_slave_control_reg,
195 chip->deadlock_avoid_type_reg,
196 chip->intpin_reg_wpermit_reg0,
197 chip->intpin_reg_wpermit_reg1,
198 chip->intpin_reg_wpermit_reg2,
199 chip->intpin_reg_wpermit_reg3);
200 for (i = 0; i < MAX_NUM_INT_REDUCE_CONTROL_REG; i++) {
201 chip->int_reduce_control_reg[i] =
202 ioread32(p + PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE + 4 * i);
203 dev_dbg(&pdev->dev, "%s : "
204 "chip->int_reduce_control_reg[%d]=%x\n",
205 __func__, i, chip->int_reduce_control_reg[i]);
206 }
207 chip->clkcfg_reg = ioread32(p + CLKCFG_REG_OFFSET);
208 if ((chip->ioh_type == 2) || (chip->ioh_type == 4))
209 chip->funcsel_reg = ioread32(p + FUNCSEL_REG_OFFSET);
210 }
211
212 /* pch_phub_restore_reg_conf - restore register configuration */
213 static void pch_phub_restore_reg_conf(struct pci_dev *pdev)
214 {
215 unsigned int i;
216 struct pch_phub_reg *chip = pci_get_drvdata(pdev);
217 void __iomem *p;
218 p = chip->pch_phub_base_address;
219
220 iowrite32(chip->phub_id_reg, p + PCH_PHUB_ID_REG);
221 iowrite32(chip->q_pri_val_reg, p + PCH_PHUB_QUEUE_PRI_VAL_REG);
222 iowrite32(chip->rc_q_maxsize_reg, p + PCH_PHUB_RC_QUEUE_MAXSIZE_REG);
223 iowrite32(chip->bri_q_maxsize_reg, p + PCH_PHUB_BRI_QUEUE_MAXSIZE_REG);
224 iowrite32(chip->comp_resp_timeout_reg,
225 p + PCH_PHUB_COMP_RESP_TIMEOUT_REG);
226 iowrite32(chip->bus_slave_control_reg,
227 p + PCH_PHUB_BUS_SLAVE_CONTROL_REG);
228 iowrite32(chip->deadlock_avoid_type_reg,
229 p + PCH_PHUB_DEADLOCK_AVOID_TYPE_REG);
230 iowrite32(chip->intpin_reg_wpermit_reg0,
231 p + PCH_PHUB_INTPIN_REG_WPERMIT_REG0);
232 iowrite32(chip->intpin_reg_wpermit_reg1,
233 p + PCH_PHUB_INTPIN_REG_WPERMIT_REG1);
234 iowrite32(chip->intpin_reg_wpermit_reg2,
235 p + PCH_PHUB_INTPIN_REG_WPERMIT_REG2);
236 iowrite32(chip->intpin_reg_wpermit_reg3,
237 p + PCH_PHUB_INTPIN_REG_WPERMIT_REG3);
238 dev_dbg(&pdev->dev, "%s : "
239 "chip->phub_id_reg=%x, "
240 "chip->q_pri_val_reg=%x, "
241 "chip->rc_q_maxsize_reg=%x, "
242 "chip->bri_q_maxsize_reg=%x, "
243 "chip->comp_resp_timeout_reg=%x, "
244 "chip->bus_slave_control_reg=%x, "
245 "chip->deadlock_avoid_type_reg=%x, "
246 "chip->intpin_reg_wpermit_reg0=%x, "
247 "chip->intpin_reg_wpermit_reg1=%x, "
248 "chip->intpin_reg_wpermit_reg2=%x, "
249 "chip->intpin_reg_wpermit_reg3=%x\n", __func__,
250 chip->phub_id_reg,
251 chip->q_pri_val_reg,
252 chip->rc_q_maxsize_reg,
253 chip->bri_q_maxsize_reg,
254 chip->comp_resp_timeout_reg,
255 chip->bus_slave_control_reg,
256 chip->deadlock_avoid_type_reg,
257 chip->intpin_reg_wpermit_reg0,
258 chip->intpin_reg_wpermit_reg1,
259 chip->intpin_reg_wpermit_reg2,
260 chip->intpin_reg_wpermit_reg3);
261 for (i = 0; i < MAX_NUM_INT_REDUCE_CONTROL_REG; i++) {
262 iowrite32(chip->int_reduce_control_reg[i],
263 p + PCH_PHUB_INT_REDUCE_CONTROL_REG_BASE + 4 * i);
264 dev_dbg(&pdev->dev, "%s : "
265 "chip->int_reduce_control_reg[%d]=%x\n",
266 __func__, i, chip->int_reduce_control_reg[i]);
267 }
268
269 iowrite32(chip->clkcfg_reg, p + CLKCFG_REG_OFFSET);
270 if ((chip->ioh_type == 2) || (chip->ioh_type == 4))
271 iowrite32(chip->funcsel_reg, p + FUNCSEL_REG_OFFSET);
272 }
273 #endif
274
275 /**
276 * pch_phub_read_serial_rom() - Reading Serial ROM
277 * @offset_address: Serial ROM offset address to read.
278 * @data: Read buffer for specified Serial ROM value.
279 */
280 static void pch_phub_read_serial_rom(struct pch_phub_reg *chip,
281 unsigned int offset_address, u8 *data)
282 {
283 void __iomem *mem_addr = chip->pch_phub_extrom_base_address +
284 offset_address;
285
286 *data = ioread8(mem_addr);
287 }
288
289 /**
290 * pch_phub_write_serial_rom() - Writing Serial ROM
291 * @offset_address: Serial ROM offset address.
292 * @data: Serial ROM value to write.
293 */
294 static int pch_phub_write_serial_rom(struct pch_phub_reg *chip,
295 unsigned int offset_address, u8 data)
296 {
297 void __iomem *mem_addr = chip->pch_phub_extrom_base_address +
298 (offset_address & PCH_WORD_ADDR_MASK);
299 int i;
300 unsigned int word_data;
301 unsigned int pos;
302 unsigned int mask;
303 pos = (offset_address % 4) * 8;
304 mask = ~(0xFF << pos);
305
306 iowrite32(PCH_PHUB_ROM_WRITE_ENABLE,
307 chip->pch_phub_extrom_base_address + PHUB_CONTROL);
308
309 word_data = ioread32(mem_addr);
310 iowrite32((word_data & mask) | (u32)data << pos, mem_addr);
311
312 i = 0;
313 while (ioread8(chip->pch_phub_extrom_base_address +
314 PHUB_STATUS) != 0x00) {
315 msleep(1);
316 if (i == PHUB_TIMEOUT)
317 return -ETIMEDOUT;
318 i++;
319 }
320
321 iowrite32(PCH_PHUB_ROM_WRITE_DISABLE,
322 chip->pch_phub_extrom_base_address + PHUB_CONTROL);
323
324 return 0;
325 }
326
327 /**
328 * pch_phub_read_serial_rom_val() - Read Serial ROM value
329 * @offset_address: Serial ROM address offset value.
330 * @data: Serial ROM value to read.
331 */
332 static void pch_phub_read_serial_rom_val(struct pch_phub_reg *chip,
333 unsigned int offset_address, u8 *data)
334 {
335 unsigned int mem_addr;
336
337 mem_addr = chip->pch_mac_start_address +
338 pch_phub_mac_offset[offset_address];
339
340 pch_phub_read_serial_rom(chip, mem_addr, data);
341 }
342
343 /**
344 * pch_phub_write_serial_rom_val() - writing Serial ROM value
345 * @offset_address: Serial ROM address offset value.
346 * @data: Serial ROM value.
347 */
348 static int pch_phub_write_serial_rom_val(struct pch_phub_reg *chip,
349 unsigned int offset_address, u8 data)
350 {
351 int retval;
352 unsigned int mem_addr;
353
354 mem_addr = chip->pch_mac_start_address +
355 pch_phub_mac_offset[offset_address];
356
357 retval = pch_phub_write_serial_rom(chip, mem_addr, data);
358
359 return retval;
360 }
361
362 /* pch_phub_gbe_serial_rom_conf - makes Serial ROM header format configuration
363 * for Gigabit Ethernet MAC address
364 */
365 static int pch_phub_gbe_serial_rom_conf(struct pch_phub_reg *chip)
366 {
367 int retval;
368
369 retval = pch_phub_write_serial_rom(chip, 0x0b, 0xbc);
370 retval |= pch_phub_write_serial_rom(chip, 0x0a, 0x10);
371 retval |= pch_phub_write_serial_rom(chip, 0x09, 0x01);
372 retval |= pch_phub_write_serial_rom(chip, 0x08, 0x02);
373
374 retval |= pch_phub_write_serial_rom(chip, 0x0f, 0x00);
375 retval |= pch_phub_write_serial_rom(chip, 0x0e, 0x00);
376 retval |= pch_phub_write_serial_rom(chip, 0x0d, 0x00);
377 retval |= pch_phub_write_serial_rom(chip, 0x0c, 0x80);
378
379 retval |= pch_phub_write_serial_rom(chip, 0x13, 0xbc);
380 retval |= pch_phub_write_serial_rom(chip, 0x12, 0x10);
381 retval |= pch_phub_write_serial_rom(chip, 0x11, 0x01);
382 retval |= pch_phub_write_serial_rom(chip, 0x10, 0x18);
383
384 retval |= pch_phub_write_serial_rom(chip, 0x1b, 0xbc);
385 retval |= pch_phub_write_serial_rom(chip, 0x1a, 0x10);
386 retval |= pch_phub_write_serial_rom(chip, 0x19, 0x01);
387 retval |= pch_phub_write_serial_rom(chip, 0x18, 0x19);
388
389 retval |= pch_phub_write_serial_rom(chip, 0x23, 0xbc);
390 retval |= pch_phub_write_serial_rom(chip, 0x22, 0x10);
391 retval |= pch_phub_write_serial_rom(chip, 0x21, 0x01);
392 retval |= pch_phub_write_serial_rom(chip, 0x20, 0x3a);
393
394 retval |= pch_phub_write_serial_rom(chip, 0x27, 0x01);
395 retval |= pch_phub_write_serial_rom(chip, 0x26, 0x00);
396 retval |= pch_phub_write_serial_rom(chip, 0x25, 0x00);
397 retval |= pch_phub_write_serial_rom(chip, 0x24, 0x00);
398
399 return retval;
400 }
401
402 /* pch_phub_gbe_serial_rom_conf_mp - makes SerialROM header format configuration
403 * for Gigabit Ethernet MAC address
404 */
405 static int pch_phub_gbe_serial_rom_conf_mp(struct pch_phub_reg *chip)
406 {
407 int retval;
408 u32 offset_addr;
409
410 offset_addr = 0x200;
411 retval = pch_phub_write_serial_rom(chip, 0x03 + offset_addr, 0xbc);
412 retval |= pch_phub_write_serial_rom(chip, 0x02 + offset_addr, 0x00);
413 retval |= pch_phub_write_serial_rom(chip, 0x01 + offset_addr, 0x40);
414 retval |= pch_phub_write_serial_rom(chip, 0x00 + offset_addr, 0x02);
415
416 retval |= pch_phub_write_serial_rom(chip, 0x07 + offset_addr, 0x00);
417 retval |= pch_phub_write_serial_rom(chip, 0x06 + offset_addr, 0x00);
418 retval |= pch_phub_write_serial_rom(chip, 0x05 + offset_addr, 0x00);
419 retval |= pch_phub_write_serial_rom(chip, 0x04 + offset_addr, 0x80);
420
421 retval |= pch_phub_write_serial_rom(chip, 0x0b + offset_addr, 0xbc);
422 retval |= pch_phub_write_serial_rom(chip, 0x0a + offset_addr, 0x00);
423 retval |= pch_phub_write_serial_rom(chip, 0x09 + offset_addr, 0x40);
424 retval |= pch_phub_write_serial_rom(chip, 0x08 + offset_addr, 0x18);
425
426 retval |= pch_phub_write_serial_rom(chip, 0x13 + offset_addr, 0xbc);
427 retval |= pch_phub_write_serial_rom(chip, 0x12 + offset_addr, 0x00);
428 retval |= pch_phub_write_serial_rom(chip, 0x11 + offset_addr, 0x40);
429 retval |= pch_phub_write_serial_rom(chip, 0x10 + offset_addr, 0x19);
430
431 retval |= pch_phub_write_serial_rom(chip, 0x1b + offset_addr, 0xbc);
432 retval |= pch_phub_write_serial_rom(chip, 0x1a + offset_addr, 0x00);
433 retval |= pch_phub_write_serial_rom(chip, 0x19 + offset_addr, 0x40);
434 retval |= pch_phub_write_serial_rom(chip, 0x18 + offset_addr, 0x3a);
435
436 retval |= pch_phub_write_serial_rom(chip, 0x1f + offset_addr, 0x01);
437 retval |= pch_phub_write_serial_rom(chip, 0x1e + offset_addr, 0x00);
438 retval |= pch_phub_write_serial_rom(chip, 0x1d + offset_addr, 0x00);
439 retval |= pch_phub_write_serial_rom(chip, 0x1c + offset_addr, 0x00);
440
441 return retval;
442 }
443
444 /**
445 * pch_phub_read_gbe_mac_addr() - Read Gigabit Ethernet MAC address
446 * @offset_address: Gigabit Ethernet MAC address offset value.
447 * @data: Buffer of the Gigabit Ethernet MAC address value.
448 */
449 static void pch_phub_read_gbe_mac_addr(struct pch_phub_reg *chip, u8 *data)
450 {
451 int i;
452 for (i = 0; i < ETH_ALEN; i++)
453 pch_phub_read_serial_rom_val(chip, i, &data[i]);
454 }
455
456 /**
457 * pch_phub_write_gbe_mac_addr() - Write MAC address
458 * @offset_address: Gigabit Ethernet MAC address offset value.
459 * @data: Gigabit Ethernet MAC address value.
460 */
461 static int pch_phub_write_gbe_mac_addr(struct pch_phub_reg *chip, u8 *data)
462 {
463 int retval;
464 int i;
465
466 if ((chip->ioh_type == 1) || (chip->ioh_type == 5)) /* EG20T or ML7831*/
467 retval = pch_phub_gbe_serial_rom_conf(chip);
468 else /* ML7223 */
469 retval = pch_phub_gbe_serial_rom_conf_mp(chip);
470 if (retval)
471 return retval;
472
473 for (i = 0; i < ETH_ALEN; i++) {
474 retval = pch_phub_write_serial_rom_val(chip, i, data[i]);
475 if (retval)
476 return retval;
477 }
478
479 return retval;
480 }
481
482 static ssize_t pch_phub_bin_read(struct file *filp, struct kobject *kobj,
483 struct bin_attribute *attr, char *buf,
484 loff_t off, size_t count)
485 {
486 unsigned int rom_signature;
487 unsigned char rom_length;
488 unsigned int tmp;
489 unsigned int addr_offset;
490 unsigned int orom_size;
491 int ret;
492 int err;
493 ssize_t rom_size;
494
495 struct pch_phub_reg *chip = dev_get_drvdata(kobj_to_dev(kobj));
496
497 ret = mutex_lock_interruptible(&pch_phub_mutex);
498 if (ret) {
499 err = -ERESTARTSYS;
500 goto return_err_nomutex;
501 }
502
503 /* Get Rom signature */
504 chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
505 if (!chip->pch_phub_extrom_base_address) {
506 err = -ENODATA;
507 goto exrom_map_err;
508 }
509
510 pch_phub_read_serial_rom(chip, chip->pch_opt_rom_start_address,
511 (unsigned char *)&rom_signature);
512 rom_signature &= 0xff;
513 pch_phub_read_serial_rom(chip, chip->pch_opt_rom_start_address + 1,
514 (unsigned char *)&tmp);
515 rom_signature |= (tmp & 0xff) << 8;
516 if (rom_signature == 0xAA55) {
517 pch_phub_read_serial_rom(chip,
518 chip->pch_opt_rom_start_address + 2,
519 &rom_length);
520 orom_size = rom_length * 512;
521 if (orom_size < off) {
522 addr_offset = 0;
523 goto return_ok;
524 }
525 if (orom_size < count) {
526 addr_offset = 0;
527 goto return_ok;
528 }
529
530 for (addr_offset = 0; addr_offset < count; addr_offset++) {
531 pch_phub_read_serial_rom(chip,
532 chip->pch_opt_rom_start_address + addr_offset + off,
533 &buf[addr_offset]);
534 }
535 } else {
536 err = -ENODATA;
537 goto return_err;
538 }
539 return_ok:
540 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
541 mutex_unlock(&pch_phub_mutex);
542 return addr_offset;
543
544 return_err:
545 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
546 exrom_map_err:
547 mutex_unlock(&pch_phub_mutex);
548 return_err_nomutex:
549 return err;
550 }
551
552 static ssize_t pch_phub_bin_write(struct file *filp, struct kobject *kobj,
553 struct bin_attribute *attr,
554 char *buf, loff_t off, size_t count)
555 {
556 int err;
557 unsigned int addr_offset;
558 int ret;
559 ssize_t rom_size;
560 struct pch_phub_reg *chip = dev_get_drvdata(kobj_to_dev(kobj));
561
562 ret = mutex_lock_interruptible(&pch_phub_mutex);
563 if (ret)
564 return -ERESTARTSYS;
565
566 if (off > PCH_PHUB_OROM_SIZE) {
567 addr_offset = 0;
568 goto return_ok;
569 }
570 if (count > PCH_PHUB_OROM_SIZE) {
571 addr_offset = 0;
572 goto return_ok;
573 }
574
575 chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
576 if (!chip->pch_phub_extrom_base_address) {
577 err = -ENOMEM;
578 goto exrom_map_err;
579 }
580
581 for (addr_offset = 0; addr_offset < count; addr_offset++) {
582 if (PCH_PHUB_OROM_SIZE < off + addr_offset)
583 goto return_ok;
584
585 ret = pch_phub_write_serial_rom(chip,
586 chip->pch_opt_rom_start_address + addr_offset + off,
587 buf[addr_offset]);
588 if (ret) {
589 err = ret;
590 goto return_err;
591 }
592 }
593
594 return_ok:
595 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
596 mutex_unlock(&pch_phub_mutex);
597 return addr_offset;
598
599 return_err:
600 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
601
602 exrom_map_err:
603 mutex_unlock(&pch_phub_mutex);
604 return err;
605 }
606
607 static ssize_t show_pch_mac(struct device *dev, struct device_attribute *attr,
608 char *buf)
609 {
610 u8 mac[8];
611 struct pch_phub_reg *chip = dev_get_drvdata(dev);
612 ssize_t rom_size;
613
614 chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
615 if (!chip->pch_phub_extrom_base_address)
616 return -ENOMEM;
617
618 pch_phub_read_gbe_mac_addr(chip, mac);
619 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
620
621 return sprintf(buf, "%pM\n", mac);
622 }
623
624 static ssize_t store_pch_mac(struct device *dev, struct device_attribute *attr,
625 const char *buf, size_t count)
626 {
627 u8 mac[ETH_ALEN];
628 ssize_t rom_size;
629 struct pch_phub_reg *chip = dev_get_drvdata(dev);
630 int ret;
631
632 if (!mac_pton(buf, mac))
633 return -EINVAL;
634
635 chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
636 if (!chip->pch_phub_extrom_base_address)
637 return -ENOMEM;
638
639 ret = pch_phub_write_gbe_mac_addr(chip, mac);
640 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
641 if (ret)
642 return ret;
643
644 return count;
645 }
646
647 static DEVICE_ATTR(pch_mac, S_IRUGO | S_IWUSR, show_pch_mac, store_pch_mac);
648
649 static const struct bin_attribute pch_bin_attr = {
650 .attr = {
651 .name = "pch_firmware",
652 .mode = S_IRUGO | S_IWUSR,
653 },
654 .size = PCH_PHUB_OROM_SIZE + 1,
655 .read = pch_phub_bin_read,
656 .write = pch_phub_bin_write,
657 };
658
659 static int pch_phub_probe(struct pci_dev *pdev,
660 const struct pci_device_id *id)
661 {
662 int ret;
663 struct pch_phub_reg *chip;
664
665 chip = kzalloc(sizeof(struct pch_phub_reg), GFP_KERNEL);
666 if (chip == NULL)
667 return -ENOMEM;
668
669 ret = pci_enable_device(pdev);
670 if (ret) {
671 dev_err(&pdev->dev,
672 "%s : pci_enable_device FAILED(ret=%d)", __func__, ret);
673 goto err_pci_enable_dev;
674 }
675 dev_dbg(&pdev->dev, "%s : pci_enable_device returns %d\n", __func__,
676 ret);
677
678 ret = pci_request_regions(pdev, KBUILD_MODNAME);
679 if (ret) {
680 dev_err(&pdev->dev,
681 "%s : pci_request_regions FAILED(ret=%d)", __func__, ret);
682 goto err_req_regions;
683 }
684 dev_dbg(&pdev->dev, "%s : "
685 "pci_request_regions returns %d\n", __func__, ret);
686
687 chip->pch_phub_base_address = pci_iomap(pdev, 1, 0);
688
689
690 if (chip->pch_phub_base_address == NULL) {
691 dev_err(&pdev->dev, "%s : pci_iomap FAILED", __func__);
692 ret = -ENOMEM;
693 goto err_pci_iomap;
694 }
695 dev_dbg(&pdev->dev, "%s : pci_iomap SUCCESS and value "
696 "in pch_phub_base_address variable is %p\n", __func__,
697 chip->pch_phub_base_address);
698
699 chip->pdev = pdev; /* Save pci device struct */
700
701 if (id->driver_data == 1) { /* EG20T PCH */
702 const char *board_name;
703 unsigned int prefetch = 0x000affaa;
704
705 if (pdev->dev.of_node)
706 of_property_read_u32(pdev->dev.of_node,
707 "intel,eg20t-prefetch",
708 &prefetch);
709
710 ret = sysfs_create_file(&pdev->dev.kobj,
711 &dev_attr_pch_mac.attr);
712 if (ret)
713 goto err_sysfs_create;
714
715 ret = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
716 if (ret)
717 goto exit_bin_attr;
718
719 pch_phub_read_modify_write_reg(chip,
720 (unsigned int)CLKCFG_REG_OFFSET,
721 CLKCFG_CAN_50MHZ,
722 CLKCFG_CANCLK_MASK);
723
724 /* quirk for CM-iTC board */
725 board_name = dmi_get_system_info(DMI_BOARD_NAME);
726 if (board_name && strstr(board_name, "CM-iTC"))
727 pch_phub_read_modify_write_reg(chip,
728 (unsigned int)CLKCFG_REG_OFFSET,
729 CLKCFG_UART_48MHZ | CLKCFG_BAUDDIV |
730 CLKCFG_PLL2VCO | CLKCFG_UARTCLKSEL,
731 CLKCFG_UART_MASK);
732
733 /* set the prefech value */
734 iowrite32(prefetch, chip->pch_phub_base_address + 0x14);
735 /* set the interrupt delay value */
736 iowrite32(0x25, chip->pch_phub_base_address + 0x44);
737 chip->pch_opt_rom_start_address = PCH_PHUB_ROM_START_ADDR_EG20T;
738 chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_EG20T;
739
740 /* quirk for MIPS Boston platform */
741 if (pdev->dev.of_node) {
742 if (of_machine_is_compatible("img,boston")) {
743 pch_phub_read_modify_write_reg(chip,
744 (unsigned int)CLKCFG_REG_OFFSET,
745 CLKCFG_UART_25MHZ,
746 CLKCFG_UART_MASK);
747 }
748 }
749 } else if (id->driver_data == 2) { /* ML7213 IOH */
750 ret = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
751 if (ret)
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 ret = sysfs_create_file(&pdev->dev.kobj,
774 &dev_attr_pch_mac.attr);
775 if (ret)
776 goto err_sysfs_create;
777 ret = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
778 if (ret)
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 ret = sysfs_create_file(&pdev->dev.kobj,
791 &dev_attr_pch_mac.attr);
792 if (ret)
793 goto err_sysfs_create;
794
795 ret = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
796 if (ret)
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 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 const 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 = pch_phub_remove,
896 .suspend = pch_phub_suspend,
897 .resume = pch_phub_resume
898 };
899
900 module_pci_driver(pch_phub_driver);
901
902 MODULE_DESCRIPTION("Intel EG20T PCH/LAPIS Semiconductor IOH(ML7213/ML7223) PHUB");
903 MODULE_LICENSE("GPL");
Linux with added FPC-III support