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1 /*
2  * Cortina CS4315/CS4340 10G PHY drivers
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  *
6  * Copyright 2014 Freescale Semiconductor, Inc.
7  *
8  */
9
10 #include <config.h>
11 #include <common.h>
12 #include <malloc.h>
13 #include <linux/ctype.h>
14 #include <linux/string.h>
15 #include <linux/err.h>
16 #include <phy.h>
17 #include <cortina.h>
18 #ifdef CONFIG_SYS_CORTINA_FW_IN_NAND
19 #include <nand.h>
20 #elif defined(CONFIG_SYS_CORTINA_FW_IN_SPIFLASH)
21 #include <spi_flash.h>
22 #elif defined(CONFIG_SYS_CORTINA_FW_IN_MMC)
23 #include <mmc.h>
24 #endif
25
26 #ifndef CONFIG_PHYLIB_10G
27 #error The Cortina PHY needs 10G support
28 #endif
29
30 struct cortina_reg_config cortina_reg_cfg[] = {
31         /* CS4315_enable_sr_mode */
32         {VILLA_GLOBAL_MSEQCLKCTRL, 0x8004},
33         {VILLA_MSEQ_OPTIONS, 0xf},
34         {VILLA_MSEQ_PC, 0x0},
35         {VILLA_MSEQ_BANKSELECT,    0x4},
36         {VILLA_LINE_SDS_COMMON_SRX0_RX_CPA, 0x55},
37         {VILLA_LINE_SDS_COMMON_SRX0_RX_LOOP_FILTER, 0x30},
38         {VILLA_DSP_SDS_SERDES_SRX_DFE0_SELECT, 0x1},
39         {VILLA_DSP_SDS_DSP_COEF_DFE0_SELECT, 0x2},
40         {VILLA_LINE_SDS_COMMON_SRX0_RX_CPB, 0x2003},
41         {VILLA_DSP_SDS_SERDES_SRX_FFE_DELAY_CTRL, 0xF047},
42         {VILLA_MSEQ_ENABLE_MSB, 0x0000},
43         {VILLA_MSEQ_SPARE21_LSB, 0x6},
44         {VILLA_MSEQ_RESET_COUNT_LSB, 0x0},
45         {VILLA_MSEQ_SPARE12_MSB, 0x0000},
46         /*
47          * to invert the receiver path, uncomment the next line
48          * write (VILLA_MSEQ_SPARE12_MSB, 0x4000)
49          *
50          * SPARE2_LSB is used to configure the device while in sr mode to
51          * enable power savings and to use the optical module LOS signal.
52          * in power savings mode, the internal prbs checker can not be used.
53          * if the optical module LOS signal is used as an input to the micro
54          * code, then the micro code will wait until the optical module
55          * LOS = 0 before turning on the adaptive equalizer.
56          * Setting SPARE2_LSB bit 0 to 1 places the devie in power savings mode
57          * while setting bit 0 to 0 disables power savings mode.
58          * Setting SPARE2_LSB bit 2 to 0 configures the device to use the
59          * optical module LOS signal while setting bit 2 to 1 configures the
60          * device so that it will ignore the optical module LOS SPARE2_LSB = 0
61          */
62
63         /* enable power savings, ignore optical module LOS */
64         {VILLA_MSEQ_SPARE2_LSB, 0x5},
65
66         {VILLA_MSEQ_SPARE7_LSB, 0x1e},
67         {VILLA_MSEQ_BANKSELECT, 0x4},
68         {VILLA_MSEQ_SPARE9_LSB, 0x2},
69         {VILLA_MSEQ_SPARE3_LSB, 0x0F53},
70         {VILLA_MSEQ_SPARE3_MSB, 0x2006},
71         {VILLA_MSEQ_SPARE8_LSB, 0x3FF7},
72         {VILLA_MSEQ_SPARE8_MSB, 0x0A46},
73         {VILLA_MSEQ_COEF8_FFE0_LSB, 0xD500},
74         {VILLA_MSEQ_COEF8_FFE1_LSB, 0x0200},
75         {VILLA_MSEQ_COEF8_FFE2_LSB, 0xBA00},
76         {VILLA_MSEQ_COEF8_FFE3_LSB, 0x0100},
77         {VILLA_MSEQ_COEF8_FFE4_LSB, 0x0300},
78         {VILLA_MSEQ_COEF8_FFE5_LSB, 0x0300},
79         {VILLA_MSEQ_COEF8_DFE0_LSB, 0x0700},
80         {VILLA_MSEQ_COEF8_DFE0N_LSB, 0x0E00},
81         {VILLA_MSEQ_COEF8_DFE1_LSB, 0x0B00},
82         {VILLA_DSP_SDS_DSP_COEF_LARGE_LEAK, 0x2},
83         {VILLA_DSP_SDS_SERDES_SRX_DAC_ENABLEB_LSB, 0xD000},
84         {VILLA_MSEQ_POWER_DOWN_LSB, 0xFFFF},
85         {VILLA_MSEQ_POWER_DOWN_MSB, 0x0},
86         {VILLA_MSEQ_CAL_RX_SLICER, 0x80},
87         {VILLA_DSP_SDS_SERDES_SRX_DAC_BIAS_SELECT1_MSB, 0x3f},
88         {VILLA_GLOBAL_MSEQCLKCTRL, 0x4},
89         {VILLA_MSEQ_OPTIONS, 0x7},
90
91         /* set up min value for ffe1 */
92         {VILLA_MSEQ_COEF_INIT_SEL, 0x2},
93         {VILLA_DSP_SDS_DSP_PRECODEDINITFFE21, 0x41},
94
95         /* CS4315_sr_rx_pre_eq_set_4in */
96         {VILLA_GLOBAL_MSEQCLKCTRL, 0x8004},
97         {VILLA_MSEQ_OPTIONS, 0xf},
98         {VILLA_MSEQ_BANKSELECT, 0x4},
99         {VILLA_MSEQ_PC, 0x0},
100
101         /* for lengths from 3.5 to 4.5inches */
102         {VILLA_MSEQ_SERDES_PARAM_LSB, 0x0306},
103         {VILLA_MSEQ_SPARE25_LSB, 0x0306},
104         {VILLA_MSEQ_SPARE21_LSB, 0x2},
105         {VILLA_MSEQ_SPARE23_LSB, 0x2},
106         {VILLA_MSEQ_CAL_RX_DFE_EQ, 0x0},
107
108         {VILLA_GLOBAL_MSEQCLKCTRL, 0x4},
109         {VILLA_MSEQ_OPTIONS, 0x7},
110
111         /* CS4315_rx_drive_4inch */
112         /* for length  4inches */
113         {VILLA_GLOBAL_VILLA2_COMPATIBLE, 0x0000},
114         {VILLA_HOST_SDS_COMMON_STX0_TX_OUTPUT_CTRLA, 0x3023},
115         {VILLA_LINE_SDS_COMMON_STX0_TX_OUTPUT_CTRLB, 0xc01E},
116
117         /* CS4315_tx_drive_4inch */
118         /* for length  4inches */
119         {VILLA_GLOBAL_VILLA2_COMPATIBLE, 0x0000},
120         {VILLA_LINE_SDS_COMMON_STX0_TX_OUTPUT_CTRLA, 0x3023},
121         {VILLA_LINE_SDS_COMMON_STX0_TX_OUTPUT_CTRLB, 0xc01E},
122 };
123
124 void cs4340_upload_firmware(struct phy_device *phydev)
125 {
126         char line_temp[0x50] = {0};
127         char reg_addr[0x50] = {0};
128         char reg_data[0x50] = {0};
129         int i, line_cnt = 0, column_cnt = 0;
130         struct cortina_reg_config fw_temp;
131         char *addr = NULL;
132
133 #if defined(CONFIG_SYS_CORTINA_FW_IN_NOR) || \
134         defined(CONFIG_SYS_CORTINA_FW_IN_REMOTE)
135
136         addr = (char *)CONFIG_CORTINA_FW_ADDR;
137 #elif defined(CONFIG_SYS_CORTINA_FW_IN_NAND)
138         int ret;
139         size_t fw_length = CONFIG_CORTINA_FW_LENGTH;
140
141         addr = malloc(CONFIG_CORTINA_FW_LENGTH);
142         ret = nand_read(&nand_info[0], (loff_t)CONFIG_CORTINA_FW_ADDR,
143                        &fw_length, (u_char *)addr);
144         if (ret == -EUCLEAN) {
145                 printf("NAND read of Cortina firmware at 0x%x failed %d\n",
146                        CONFIG_CORTINA_FW_ADDR, ret);
147         }
148 #elif defined(CONFIG_SYS_CORTINA_FW_IN_SPIFLASH)
149         int ret;
150         struct spi_flash *ucode_flash;
151
152         addr = malloc(CONFIG_CORTINA_FW_LENGTH);
153         ucode_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
154                                 CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
155         if (!ucode_flash) {
156                 puts("SF: probe for Cortina ucode failed\n");
157         } else {
158                 ret = spi_flash_read(ucode_flash, CONFIG_CORTINA_FW_ADDR,
159                                      CONFIG_CORTINA_FW_LENGTH, addr);
160                 if (ret)
161                         puts("SF: read for Cortina ucode failed\n");
162                 spi_flash_free(ucode_flash);
163         }
164 #elif defined(CONFIG_SYS_CORTINA_FW_IN_MMC)
165         int dev = CONFIG_SYS_MMC_ENV_DEV;
166         u32 cnt = CONFIG_CORTINA_FW_LENGTH / 512;
167         u32 blk = CONFIG_CORTINA_FW_ADDR / 512;
168         struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
169
170         if (!mmc) {
171                 puts("Failed to find MMC device for Cortina ucode\n");
172         } else {
173                 addr = malloc(CONFIG_CORTINA_FW_LENGTH);
174                 printf("MMC read: dev # %u, block # %u, count %u ...\n",
175                        dev, blk, cnt);
176                 mmc_init(mmc);
177                 (void)mmc->block_dev.block_read(&mmc->block_dev, blk, cnt,
178                                                 addr);
179                 /* flush cache after read */
180                 flush_cache((ulong)addr, cnt * 512);
181         }
182 #endif
183
184         while (*addr != 'Q') {
185                 i = 0;
186
187                 while (*addr != 0x0a) {
188                         line_temp[i++] = *addr++;
189                         if (0x50 < i) {
190                                 printf("Not found Cortina PHY ucode at 0x%p\n",
191                                        (char *)CONFIG_CORTINA_FW_ADDR);
192                                 return;
193                         }
194                 }
195
196                 addr++;  /* skip '\n' */
197                 line_cnt++;
198                 column_cnt = i;
199                 line_temp[column_cnt] = '\0';
200
201                 if (CONFIG_CORTINA_FW_LENGTH < line_cnt)
202                         return;
203
204                 for (i = 0; i < column_cnt; i++) {
205                         if (isspace(line_temp[i++]))
206                                 break;
207                 }
208
209                 memcpy(reg_addr, line_temp, i);
210                 memcpy(reg_data, &line_temp[i], column_cnt - i);
211                 strim(reg_addr);
212                 strim(reg_data);
213                 fw_temp.reg_addr = (simple_strtoul(reg_addr, NULL, 0)) & 0xffff;
214                 fw_temp.reg_value = (simple_strtoul(reg_data, NULL, 0)) &
215                                      0xffff;
216                 phy_write(phydev, 0x00, fw_temp.reg_addr, fw_temp.reg_value);
217         }
218 }
219
220 int cs4340_phy_init(struct phy_device *phydev)
221 {
222         int timeout = 100;  /* 100ms */
223         int reg_value;
224
225         /* step1: BIST test */
226         phy_write(phydev, 0x00, VILLA_GLOBAL_MSEQCLKCTRL,     0x0004);
227         phy_write(phydev, 0x00, VILLA_GLOBAL_LINE_SOFT_RESET, 0x0000);
228         phy_write(phydev, 0x00, VILLA_GLOBAL_BIST_CONTROL,    0x0001);
229         while (--timeout) {
230                 reg_value = phy_read(phydev, 0x00, VILLA_GLOBAL_BIST_STATUS);
231                 if (reg_value & mseq_edc_bist_done) {
232                         if (0 == (reg_value & mseq_edc_bist_fail))
233                                 break;
234                 }
235                 udelay(1000);
236         }
237
238         if (!timeout) {
239                 printf("%s BIST mseq_edc_bist_done timeout!\n", __func__);
240                 return -1;
241         }
242
243         /* setp2: upload ucode */
244         cs4340_upload_firmware(phydev);
245         reg_value = phy_read(phydev, 0x00, VILLA_GLOBAL_DWNLD_CHECKSUM_STATUS);
246         if (reg_value) {
247                 debug("%s checksum status failed.\n", __func__);
248                 return -1;
249         }
250
251         return 0;
252 }
253
254 int cs4340_config(struct phy_device *phydev)
255 {
256         cs4340_phy_init(phydev);
257         return 0;
258 }
259
260 int cs4340_startup(struct phy_device *phydev)
261 {
262         phydev->link = 1;
263
264         /* For now just lie and say it's 10G all the time */
265         phydev->speed = SPEED_10000;
266         phydev->duplex = DUPLEX_FULL;
267         return 0;
268 }
269
270 struct phy_driver cs4340_driver = {
271         .name = "Cortina CS4315/CS4340",
272         .uid = PHY_UID_CS4340,
273         .mask = 0xfffffff0,
274         .features = PHY_10G_FEATURES,
275         .mmds = (MDIO_DEVS_PMAPMD | MDIO_DEVS_PCS |
276                  MDIO_DEVS_PHYXS | MDIO_DEVS_AN |
277                  MDIO_DEVS_VEND1 | MDIO_DEVS_VEND2),
278         .config = &cs4340_config,
279         .startup = &cs4340_startup,
280         .shutdown = &gen10g_shutdown,
281 };
282
283 int phy_cortina_init(void)
284 {
285         phy_register(&cs4340_driver);
286         return 0;
287 }
288
289 int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
290 {
291         int phy_reg;
292         bool is_cortina_phy = false;
293
294         switch (addr) {
295 #ifdef CORTINA_PHY_ADDR1
296         case CORTINA_PHY_ADDR1:
297 #endif
298 #ifdef CORTINA_PHY_ADDR2
299         case CORTINA_PHY_ADDR2:
300 #endif
301 #ifdef CORTINA_PHY_ADDR3
302         case CORTINA_PHY_ADDR3:
303 #endif
304 #ifdef CORTINA_PHY_ADDR4
305         case CORTINA_PHY_ADDR4:
306 #endif
307                 is_cortina_phy = true;
308                 break;
309         default:
310                 break;
311         }
312
313         /* Cortina PHY has non-standard offset of PHY ID registers */
314         if (is_cortina_phy)
315                 phy_reg = bus->read(bus, addr, 0, VILLA_GLOBAL_CHIP_ID_LSB);
316         else
317                 phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
318
319         if (phy_reg < 0)
320                 return -EIO;
321
322         *phy_id = (phy_reg & 0xffff) << 16;
323         if (is_cortina_phy)
324                 phy_reg = bus->read(bus, addr, 0, VILLA_GLOBAL_CHIP_ID_MSB);
325         else
326                 phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
327
328         if (phy_reg < 0)
329                 return -EIO;
330
331         *phy_id |= (phy_reg & 0xffff);
332
333         return 0;
334 }