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 * @chip: Pointer to the PHUB register structure
139 * @reg_addr_offset: Register offset address value.
140 * @data: Writing value.
141 * @mask: Mask value.
142 */
pch_phub_read_modify_write_reg(struct pch_phub_reg * chip,unsigned int reg_addr_offset,unsigned int data,unsigned int mask)143 static void pch_phub_read_modify_write_reg(struct pch_phub_reg *chip,
144 unsigned int reg_addr_offset,
145 unsigned int data, unsigned int mask)
146 {
147 void __iomem *reg_addr = chip->pch_phub_base_address + reg_addr_offset;
148 iowrite32(((ioread32(reg_addr) & ~mask)) | data, reg_addr);
149 }
150
151 /* pch_phub_save_reg_conf - saves register configuration */
pch_phub_save_reg_conf(struct pci_dev * pdev)152 static void __maybe_unused 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 */
pch_phub_restore_reg_conf(struct pci_dev * pdev)213 static void __maybe_unused 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
274 /**
275 * pch_phub_read_serial_rom() - Reading Serial ROM
276 * @chip: Pointer to the PHUB register structure
277 * @offset_address: Serial ROM offset address to read.
278 * @data: Read buffer for specified Serial ROM value.
279 */
pch_phub_read_serial_rom(struct pch_phub_reg * chip,unsigned int offset_address,u8 * data)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 * @chip: Pointer to the PHUB register structure
292 * @offset_address: Serial ROM offset address.
293 * @data: Serial ROM value to write.
294 */
pch_phub_write_serial_rom(struct pch_phub_reg * chip,unsigned int offset_address,u8 data)295 static int pch_phub_write_serial_rom(struct pch_phub_reg *chip,
296 unsigned int offset_address, u8 data)
297 {
298 void __iomem *mem_addr = chip->pch_phub_extrom_base_address +
299 (offset_address & PCH_WORD_ADDR_MASK);
300 int i;
301 unsigned int word_data;
302 unsigned int pos;
303 unsigned int mask;
304 pos = (offset_address % 4) * 8;
305 mask = ~(0xFF << pos);
306
307 iowrite32(PCH_PHUB_ROM_WRITE_ENABLE,
308 chip->pch_phub_extrom_base_address + PHUB_CONTROL);
309
310 word_data = ioread32(mem_addr);
311 iowrite32((word_data & mask) | (u32)data << pos, mem_addr);
312
313 i = 0;
314 while (ioread8(chip->pch_phub_extrom_base_address +
315 PHUB_STATUS) != 0x00) {
316 msleep(1);
317 if (i == PHUB_TIMEOUT)
318 return -ETIMEDOUT;
319 i++;
320 }
321
322 iowrite32(PCH_PHUB_ROM_WRITE_DISABLE,
323 chip->pch_phub_extrom_base_address + PHUB_CONTROL);
324
325 return 0;
326 }
327
328 /**
329 * pch_phub_read_serial_rom_val() - Read Serial ROM value
330 * @chip: Pointer to the PHUB register structure
331 * @offset_address: Serial ROM address offset value.
332 * @data: Serial ROM value to read.
333 */
pch_phub_read_serial_rom_val(struct pch_phub_reg * chip,unsigned int offset_address,u8 * data)334 static void pch_phub_read_serial_rom_val(struct pch_phub_reg *chip,
335 unsigned int offset_address, u8 *data)
336 {
337 unsigned int mem_addr;
338
339 mem_addr = chip->pch_mac_start_address +
340 pch_phub_mac_offset[offset_address];
341
342 pch_phub_read_serial_rom(chip, mem_addr, data);
343 }
344
345 /**
346 * pch_phub_write_serial_rom_val() - writing Serial ROM value
347 * @chip: Pointer to the PHUB register structure
348 * @offset_address: Serial ROM address offset value.
349 * @data: Serial ROM value.
350 */
pch_phub_write_serial_rom_val(struct pch_phub_reg * chip,unsigned int offset_address,u8 data)351 static int pch_phub_write_serial_rom_val(struct pch_phub_reg *chip,
352 unsigned int offset_address, u8 data)
353 {
354 int retval;
355 unsigned int mem_addr;
356
357 mem_addr = chip->pch_mac_start_address +
358 pch_phub_mac_offset[offset_address];
359
360 retval = pch_phub_write_serial_rom(chip, mem_addr, data);
361
362 return retval;
363 }
364
365 /* pch_phub_gbe_serial_rom_conf - makes Serial ROM header format configuration
366 * for Gigabit Ethernet MAC address
367 */
pch_phub_gbe_serial_rom_conf(struct pch_phub_reg * chip)368 static int pch_phub_gbe_serial_rom_conf(struct pch_phub_reg *chip)
369 {
370 int retval;
371
372 retval = pch_phub_write_serial_rom(chip, 0x0b, 0xbc);
373 retval |= pch_phub_write_serial_rom(chip, 0x0a, 0x10);
374 retval |= pch_phub_write_serial_rom(chip, 0x09, 0x01);
375 retval |= pch_phub_write_serial_rom(chip, 0x08, 0x02);
376
377 retval |= pch_phub_write_serial_rom(chip, 0x0f, 0x00);
378 retval |= pch_phub_write_serial_rom(chip, 0x0e, 0x00);
379 retval |= pch_phub_write_serial_rom(chip, 0x0d, 0x00);
380 retval |= pch_phub_write_serial_rom(chip, 0x0c, 0x80);
381
382 retval |= pch_phub_write_serial_rom(chip, 0x13, 0xbc);
383 retval |= pch_phub_write_serial_rom(chip, 0x12, 0x10);
384 retval |= pch_phub_write_serial_rom(chip, 0x11, 0x01);
385 retval |= pch_phub_write_serial_rom(chip, 0x10, 0x18);
386
387 retval |= pch_phub_write_serial_rom(chip, 0x1b, 0xbc);
388 retval |= pch_phub_write_serial_rom(chip, 0x1a, 0x10);
389 retval |= pch_phub_write_serial_rom(chip, 0x19, 0x01);
390 retval |= pch_phub_write_serial_rom(chip, 0x18, 0x19);
391
392 retval |= pch_phub_write_serial_rom(chip, 0x23, 0xbc);
393 retval |= pch_phub_write_serial_rom(chip, 0x22, 0x10);
394 retval |= pch_phub_write_serial_rom(chip, 0x21, 0x01);
395 retval |= pch_phub_write_serial_rom(chip, 0x20, 0x3a);
396
397 retval |= pch_phub_write_serial_rom(chip, 0x27, 0x01);
398 retval |= pch_phub_write_serial_rom(chip, 0x26, 0x00);
399 retval |= pch_phub_write_serial_rom(chip, 0x25, 0x00);
400 retval |= pch_phub_write_serial_rom(chip, 0x24, 0x00);
401
402 return retval;
403 }
404
405 /* pch_phub_gbe_serial_rom_conf_mp - makes SerialROM header format configuration
406 * for Gigabit Ethernet MAC address
407 */
pch_phub_gbe_serial_rom_conf_mp(struct pch_phub_reg * chip)408 static int pch_phub_gbe_serial_rom_conf_mp(struct pch_phub_reg *chip)
409 {
410 int retval;
411 u32 offset_addr;
412
413 offset_addr = 0x200;
414 retval = pch_phub_write_serial_rom(chip, 0x03 + offset_addr, 0xbc);
415 retval |= pch_phub_write_serial_rom(chip, 0x02 + offset_addr, 0x00);
416 retval |= pch_phub_write_serial_rom(chip, 0x01 + offset_addr, 0x40);
417 retval |= pch_phub_write_serial_rom(chip, 0x00 + offset_addr, 0x02);
418
419 retval |= pch_phub_write_serial_rom(chip, 0x07 + offset_addr, 0x00);
420 retval |= pch_phub_write_serial_rom(chip, 0x06 + offset_addr, 0x00);
421 retval |= pch_phub_write_serial_rom(chip, 0x05 + offset_addr, 0x00);
422 retval |= pch_phub_write_serial_rom(chip, 0x04 + offset_addr, 0x80);
423
424 retval |= pch_phub_write_serial_rom(chip, 0x0b + offset_addr, 0xbc);
425 retval |= pch_phub_write_serial_rom(chip, 0x0a + offset_addr, 0x00);
426 retval |= pch_phub_write_serial_rom(chip, 0x09 + offset_addr, 0x40);
427 retval |= pch_phub_write_serial_rom(chip, 0x08 + offset_addr, 0x18);
428
429 retval |= pch_phub_write_serial_rom(chip, 0x13 + offset_addr, 0xbc);
430 retval |= pch_phub_write_serial_rom(chip, 0x12 + offset_addr, 0x00);
431 retval |= pch_phub_write_serial_rom(chip, 0x11 + offset_addr, 0x40);
432 retval |= pch_phub_write_serial_rom(chip, 0x10 + offset_addr, 0x19);
433
434 retval |= pch_phub_write_serial_rom(chip, 0x1b + offset_addr, 0xbc);
435 retval |= pch_phub_write_serial_rom(chip, 0x1a + offset_addr, 0x00);
436 retval |= pch_phub_write_serial_rom(chip, 0x19 + offset_addr, 0x40);
437 retval |= pch_phub_write_serial_rom(chip, 0x18 + offset_addr, 0x3a);
438
439 retval |= pch_phub_write_serial_rom(chip, 0x1f + offset_addr, 0x01);
440 retval |= pch_phub_write_serial_rom(chip, 0x1e + offset_addr, 0x00);
441 retval |= pch_phub_write_serial_rom(chip, 0x1d + offset_addr, 0x00);
442 retval |= pch_phub_write_serial_rom(chip, 0x1c + offset_addr, 0x00);
443
444 return retval;
445 }
446
447 /**
448 * pch_phub_read_gbe_mac_addr() - Read Gigabit Ethernet MAC address
449 * @chip: Pointer to the PHUB register structure
450 * @data: Buffer of the Gigabit Ethernet MAC address value.
451 */
pch_phub_read_gbe_mac_addr(struct pch_phub_reg * chip,u8 * data)452 static void pch_phub_read_gbe_mac_addr(struct pch_phub_reg *chip, u8 *data)
453 {
454 int i;
455 for (i = 0; i < ETH_ALEN; i++)
456 pch_phub_read_serial_rom_val(chip, i, &data[i]);
457 }
458
459 /**
460 * pch_phub_write_gbe_mac_addr() - Write MAC address
461 * @chip: Pointer to the PHUB register structure
462 * @data: Gigabit Ethernet MAC address value.
463 */
pch_phub_write_gbe_mac_addr(struct pch_phub_reg * chip,u8 * data)464 static int pch_phub_write_gbe_mac_addr(struct pch_phub_reg *chip, u8 *data)
465 {
466 int retval;
467 int i;
468
469 if ((chip->ioh_type == 1) || (chip->ioh_type == 5)) /* EG20T or ML7831*/
470 retval = pch_phub_gbe_serial_rom_conf(chip);
471 else /* ML7223 */
472 retval = pch_phub_gbe_serial_rom_conf_mp(chip);
473 if (retval)
474 return retval;
475
476 for (i = 0; i < ETH_ALEN; i++) {
477 retval = pch_phub_write_serial_rom_val(chip, i, data[i]);
478 if (retval)
479 return retval;
480 }
481
482 return retval;
483 }
484
pch_phub_bin_read(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)485 static ssize_t pch_phub_bin_read(struct file *filp, struct kobject *kobj,
486 struct bin_attribute *attr, char *buf,
487 loff_t off, size_t count)
488 {
489 unsigned int rom_signature;
490 unsigned char rom_length;
491 unsigned int tmp;
492 unsigned int addr_offset;
493 unsigned int orom_size;
494 int ret;
495 int err;
496 ssize_t rom_size;
497
498 struct pch_phub_reg *chip = dev_get_drvdata(kobj_to_dev(kobj));
499
500 ret = mutex_lock_interruptible(&pch_phub_mutex);
501 if (ret) {
502 err = -ERESTARTSYS;
503 goto return_err_nomutex;
504 }
505
506 /* Get Rom signature */
507 chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
508 if (!chip->pch_phub_extrom_base_address) {
509 err = -ENODATA;
510 goto exrom_map_err;
511 }
512
513 pch_phub_read_serial_rom(chip, chip->pch_opt_rom_start_address,
514 (unsigned char *)&rom_signature);
515 rom_signature &= 0xff;
516 pch_phub_read_serial_rom(chip, chip->pch_opt_rom_start_address + 1,
517 (unsigned char *)&tmp);
518 rom_signature |= (tmp & 0xff) << 8;
519 if (rom_signature == 0xAA55) {
520 pch_phub_read_serial_rom(chip,
521 chip->pch_opt_rom_start_address + 2,
522 &rom_length);
523 orom_size = rom_length * 512;
524 if (orom_size < off) {
525 addr_offset = 0;
526 goto return_ok;
527 }
528 if (orom_size < count) {
529 addr_offset = 0;
530 goto return_ok;
531 }
532
533 for (addr_offset = 0; addr_offset < count; addr_offset++) {
534 pch_phub_read_serial_rom(chip,
535 chip->pch_opt_rom_start_address + addr_offset + off,
536 &buf[addr_offset]);
537 }
538 } else {
539 err = -ENODATA;
540 goto return_err;
541 }
542 return_ok:
543 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
544 mutex_unlock(&pch_phub_mutex);
545 return addr_offset;
546
547 return_err:
548 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
549 exrom_map_err:
550 mutex_unlock(&pch_phub_mutex);
551 return_err_nomutex:
552 return err;
553 }
554
pch_phub_bin_write(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)555 static ssize_t pch_phub_bin_write(struct file *filp, struct kobject *kobj,
556 struct bin_attribute *attr,
557 char *buf, loff_t off, size_t count)
558 {
559 int err;
560 unsigned int addr_offset;
561 int ret;
562 ssize_t rom_size;
563 struct pch_phub_reg *chip = dev_get_drvdata(kobj_to_dev(kobj));
564
565 ret = mutex_lock_interruptible(&pch_phub_mutex);
566 if (ret)
567 return -ERESTARTSYS;
568
569 if (off > PCH_PHUB_OROM_SIZE) {
570 addr_offset = 0;
571 goto return_ok;
572 }
573 if (count > PCH_PHUB_OROM_SIZE) {
574 addr_offset = 0;
575 goto return_ok;
576 }
577
578 chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
579 if (!chip->pch_phub_extrom_base_address) {
580 err = -ENOMEM;
581 goto exrom_map_err;
582 }
583
584 for (addr_offset = 0; addr_offset < count; addr_offset++) {
585 if (PCH_PHUB_OROM_SIZE < off + addr_offset)
586 goto return_ok;
587
588 ret = pch_phub_write_serial_rom(chip,
589 chip->pch_opt_rom_start_address + addr_offset + off,
590 buf[addr_offset]);
591 if (ret) {
592 err = ret;
593 goto return_err;
594 }
595 }
596
597 return_ok:
598 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
599 mutex_unlock(&pch_phub_mutex);
600 return addr_offset;
601
602 return_err:
603 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
604
605 exrom_map_err:
606 mutex_unlock(&pch_phub_mutex);
607 return err;
608 }
609
show_pch_mac(struct device * dev,struct device_attribute * attr,char * buf)610 static ssize_t show_pch_mac(struct device *dev, struct device_attribute *attr,
611 char *buf)
612 {
613 u8 mac[8];
614 struct pch_phub_reg *chip = dev_get_drvdata(dev);
615 ssize_t rom_size;
616
617 chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
618 if (!chip->pch_phub_extrom_base_address)
619 return -ENOMEM;
620
621 pch_phub_read_gbe_mac_addr(chip, mac);
622 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
623
624 return sprintf(buf, "%pM\n", mac);
625 }
626
store_pch_mac(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)627 static ssize_t store_pch_mac(struct device *dev, struct device_attribute *attr,
628 const char *buf, size_t count)
629 {
630 u8 mac[ETH_ALEN];
631 ssize_t rom_size;
632 struct pch_phub_reg *chip = dev_get_drvdata(dev);
633 int ret;
634
635 if (!mac_pton(buf, mac))
636 return -EINVAL;
637
638 chip->pch_phub_extrom_base_address = pci_map_rom(chip->pdev, &rom_size);
639 if (!chip->pch_phub_extrom_base_address)
640 return -ENOMEM;
641
642 ret = pch_phub_write_gbe_mac_addr(chip, mac);
643 pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address);
644 if (ret)
645 return ret;
646
647 return count;
648 }
649
650 static DEVICE_ATTR(pch_mac, S_IRUGO | S_IWUSR, show_pch_mac, store_pch_mac);
651
652 static const struct bin_attribute pch_bin_attr = {
653 .attr = {
654 .name = "pch_firmware",
655 .mode = S_IRUGO | S_IWUSR,
656 },
657 .size = PCH_PHUB_OROM_SIZE + 1,
658 .read = pch_phub_bin_read,
659 .write = pch_phub_bin_write,
660 };
661
pch_phub_probe(struct pci_dev * pdev,const struct pci_device_id * id)662 static int pch_phub_probe(struct pci_dev *pdev,
663 const struct pci_device_id *id)
664 {
665 int ret;
666 struct pch_phub_reg *chip;
667
668 chip = kzalloc(sizeof(struct pch_phub_reg), GFP_KERNEL);
669 if (chip == NULL)
670 return -ENOMEM;
671
672 ret = pci_enable_device(pdev);
673 if (ret) {
674 dev_err(&pdev->dev,
675 "%s : pci_enable_device FAILED(ret=%d)", __func__, ret);
676 goto err_pci_enable_dev;
677 }
678 dev_dbg(&pdev->dev, "%s : pci_enable_device returns %d\n", __func__,
679 ret);
680
681 ret = pci_request_regions(pdev, KBUILD_MODNAME);
682 if (ret) {
683 dev_err(&pdev->dev,
684 "%s : pci_request_regions FAILED(ret=%d)", __func__, ret);
685 goto err_req_regions;
686 }
687 dev_dbg(&pdev->dev, "%s : "
688 "pci_request_regions returns %d\n", __func__, ret);
689
690 chip->pch_phub_base_address = pci_iomap(pdev, 1, 0);
691
692
693 if (chip->pch_phub_base_address == NULL) {
694 dev_err(&pdev->dev, "%s : pci_iomap FAILED", __func__);
695 ret = -ENOMEM;
696 goto err_pci_iomap;
697 }
698 dev_dbg(&pdev->dev, "%s : pci_iomap SUCCESS and value "
699 "in pch_phub_base_address variable is %p\n", __func__,
700 chip->pch_phub_base_address);
701
702 chip->pdev = pdev; /* Save pci device struct */
703
704 if (id->driver_data == 1) { /* EG20T PCH */
705 const char *board_name;
706 unsigned int prefetch = 0x000affaa;
707
708 if (pdev->dev.of_node)
709 of_property_read_u32(pdev->dev.of_node,
710 "intel,eg20t-prefetch",
711 &prefetch);
712
713 ret = sysfs_create_file(&pdev->dev.kobj,
714 &dev_attr_pch_mac.attr);
715 if (ret)
716 goto err_sysfs_create;
717
718 ret = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
719 if (ret)
720 goto exit_bin_attr;
721
722 pch_phub_read_modify_write_reg(chip,
723 (unsigned int)CLKCFG_REG_OFFSET,
724 CLKCFG_CAN_50MHZ,
725 CLKCFG_CANCLK_MASK);
726
727 /* quirk for CM-iTC board */
728 board_name = dmi_get_system_info(DMI_BOARD_NAME);
729 if (board_name && strstr(board_name, "CM-iTC"))
730 pch_phub_read_modify_write_reg(chip,
731 (unsigned int)CLKCFG_REG_OFFSET,
732 CLKCFG_UART_48MHZ | CLKCFG_BAUDDIV |
733 CLKCFG_PLL2VCO | CLKCFG_UARTCLKSEL,
734 CLKCFG_UART_MASK);
735
736 /* set the prefech value */
737 iowrite32(prefetch, chip->pch_phub_base_address + 0x14);
738 /* set the interrupt delay value */
739 iowrite32(0x25, chip->pch_phub_base_address + 0x44);
740 chip->pch_opt_rom_start_address = PCH_PHUB_ROM_START_ADDR_EG20T;
741 chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_EG20T;
742
743 /* quirk for MIPS Boston platform */
744 if (pdev->dev.of_node) {
745 if (of_machine_is_compatible("img,boston")) {
746 pch_phub_read_modify_write_reg(chip,
747 (unsigned int)CLKCFG_REG_OFFSET,
748 CLKCFG_UART_25MHZ,
749 CLKCFG_UART_MASK);
750 }
751 }
752 } else if (id->driver_data == 2) { /* ML7213 IOH */
753 ret = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
754 if (ret)
755 goto err_sysfs_create;
756 /* set the prefech value
757 * Device2(USB OHCI #1/ USB EHCI #1/ USB Device):a
758 * Device4(SDIO #0,1,2):f
759 * Device6(SATA 2):f
760 * Device8(USB OHCI #0/ USB EHCI #0):a
761 */
762 iowrite32(0x000affa0, chip->pch_phub_base_address + 0x14);
763 chip->pch_opt_rom_start_address =\
764 PCH_PHUB_ROM_START_ADDR_ML7213;
765 } else if (id->driver_data == 3) { /* ML7223 IOH Bus-m*/
766 /* set the prefech value
767 * Device8(GbE)
768 */
769 iowrite32(0x000a0000, chip->pch_phub_base_address + 0x14);
770 /* set the interrupt delay value */
771 iowrite32(0x25, chip->pch_phub_base_address + 0x140);
772 chip->pch_opt_rom_start_address =\
773 PCH_PHUB_ROM_START_ADDR_ML7223;
774 chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_ML7223;
775 } else if (id->driver_data == 4) { /* ML7223 IOH Bus-n*/
776 ret = sysfs_create_file(&pdev->dev.kobj,
777 &dev_attr_pch_mac.attr);
778 if (ret)
779 goto err_sysfs_create;
780 ret = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
781 if (ret)
782 goto exit_bin_attr;
783 /* set the prefech value
784 * Device2(USB OHCI #0,1,2,3/ USB EHCI #0):a
785 * Device4(SDIO #0,1):f
786 * Device6(SATA 2):f
787 */
788 iowrite32(0x0000ffa0, chip->pch_phub_base_address + 0x14);
789 chip->pch_opt_rom_start_address =\
790 PCH_PHUB_ROM_START_ADDR_ML7223;
791 chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_ML7223;
792 } else if (id->driver_data == 5) { /* ML7831 */
793 ret = sysfs_create_file(&pdev->dev.kobj,
794 &dev_attr_pch_mac.attr);
795 if (ret)
796 goto err_sysfs_create;
797
798 ret = sysfs_create_bin_file(&pdev->dev.kobj, &pch_bin_attr);
799 if (ret)
800 goto exit_bin_attr;
801
802 /* set the prefech value */
803 iowrite32(0x000affaa, chip->pch_phub_base_address + 0x14);
804 /* set the interrupt delay value */
805 iowrite32(0x25, chip->pch_phub_base_address + 0x44);
806 chip->pch_opt_rom_start_address = PCH_PHUB_ROM_START_ADDR_EG20T;
807 chip->pch_mac_start_address = PCH_PHUB_MAC_START_ADDR_EG20T;
808 }
809
810 chip->ioh_type = id->driver_data;
811 pci_set_drvdata(pdev, chip);
812
813 return 0;
814 exit_bin_attr:
815 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_pch_mac.attr);
816
817 err_sysfs_create:
818 pci_iounmap(pdev, chip->pch_phub_base_address);
819 err_pci_iomap:
820 pci_release_regions(pdev);
821 err_req_regions:
822 pci_disable_device(pdev);
823 err_pci_enable_dev:
824 kfree(chip);
825 dev_err(&pdev->dev, "%s returns %d\n", __func__, ret);
826 return ret;
827 }
828
pch_phub_remove(struct pci_dev * pdev)829 static void pch_phub_remove(struct pci_dev *pdev)
830 {
831 struct pch_phub_reg *chip = pci_get_drvdata(pdev);
832
833 sysfs_remove_file(&pdev->dev.kobj, &dev_attr_pch_mac.attr);
834 sysfs_remove_bin_file(&pdev->dev.kobj, &pch_bin_attr);
835 pci_iounmap(pdev, chip->pch_phub_base_address);
836 pci_release_regions(pdev);
837 pci_disable_device(pdev);
838 kfree(chip);
839 }
840
pch_phub_suspend(struct device * dev_d)841 static int __maybe_unused pch_phub_suspend(struct device *dev_d)
842 {
843 device_wakeup_disable(dev_d);
844
845 return 0;
846 }
847
pch_phub_resume(struct device * dev_d)848 static int __maybe_unused pch_phub_resume(struct device *dev_d)
849 {
850 device_wakeup_disable(dev_d);
851
852 return 0;
853 }
854
855 static const struct pci_device_id pch_phub_pcidev_id[] = {
856 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PCH1_PHUB), 1, },
857 { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7213_PHUB), 2, },
858 { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7223_mPHUB), 3, },
859 { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7223_nPHUB), 4, },
860 { PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ROHM_ML7831_PHUB), 5, },
861 { }
862 };
863 MODULE_DEVICE_TABLE(pci, pch_phub_pcidev_id);
864
865 static SIMPLE_DEV_PM_OPS(pch_phub_pm_ops, pch_phub_suspend, pch_phub_resume);
866
867 static struct pci_driver pch_phub_driver = {
868 .name = "pch_phub",
869 .id_table = pch_phub_pcidev_id,
870 .probe = pch_phub_probe,
871 .remove = pch_phub_remove,
872 .driver.pm = &pch_phub_pm_ops,
873 };
874
875 module_pci_driver(pch_phub_driver);
876
877 MODULE_DESCRIPTION("Intel EG20T PCH/LAPIS Semiconductor IOH(ML7213/ML7223) PHUB");
878 MODULE_LICENSE("GPL");
879