1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2016 Stefano Babic <sbabic@denx.de>
4 */
5
6 #include <asm/arch/clock.h>
7 #include <asm/arch/imx-regs.h>
8 #include <asm/arch/iomux.h>
9 #include <asm/arch/mx6-pins.h>
10 #include <linux/errno.h>
11 #include <asm/gpio.h>
12 #include <asm/mach-imx/iomux-v3.h>
13 #include <asm/mach-imx/video.h>
14 #include <mmc.h>
15 #include <fsl_esdhc.h>
16 #include <asm/arch/crm_regs.h>
17 #include <asm/io.h>
18 #include <asm/arch/sys_proto.h>
19 #include <spl.h>
20 #include <netdev.h>
21 #include <miiphy.h>
22 #include <micrel.h>
23
24 #include <common.h>
25 #include <malloc.h>
26 #include <fuse.h>
27
28 DECLARE_GLOBAL_DATA_PTR;
29
30 #define UART_PAD_CTRL (PAD_CTL_PUS_100K_UP | \
31 PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | \
32 PAD_CTL_SRE_FAST | PAD_CTL_HYS)
33
34 #define USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE | \
35 PAD_CTL_PUS_22K_UP | PAD_CTL_SPEED_LOW | \
36 PAD_CTL_DSE_80ohm | PAD_CTL_SRE_FAST | PAD_CTL_HYS)
37
38 #define I2C_PAD_CTRL (PAD_CTL_PUS_100K_UP | \
39 PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | PAD_CTL_HYS | \
40 PAD_CTL_ODE | PAD_CTL_SRE_FAST)
41
42 #define ENET_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \
43 PAD_CTL_DSE_40ohm | PAD_CTL_HYS)
44
45 static iomux_v3_cfg_t const uart1_pads[] = {
46 IOMUX_PADS(PAD_CSI0_DAT10__UART1_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)),
47 IOMUX_PADS(PAD_CSI0_DAT11__UART1_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)),
48 };
49
50 static iomux_v3_cfg_t const gpios_pads[] = {
51 IOMUX_PADS(PAD_EIM_A24__GPIO5_IO04 | MUX_PAD_CTRL(NO_PAD_CTRL)),
52 };
53
54 static iomux_v3_cfg_t const usdhc2_pads[] = {
55 IOMUX_PADS(PAD_SD2_CLK__SD2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
56 IOMUX_PADS(PAD_SD2_CMD__SD2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
57 IOMUX_PADS(PAD_SD2_DAT0__SD2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
58 IOMUX_PADS(PAD_SD2_DAT1__SD2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
59 IOMUX_PADS(PAD_SD2_DAT2__SD2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
60 IOMUX_PADS(PAD_SD2_DAT3__SD2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
61 IOMUX_PADS(PAD_NANDF_D0__GPIO2_IO00 | MUX_PAD_CTRL(NO_PAD_CTRL)),/* CD */
62 };
63
64 static iomux_v3_cfg_t const enet_pads[] = {
65 IOMUX_PADS(PAD_ENET_MDIO__ENET_MDIO | MUX_PAD_CTRL(ENET_PAD_CTRL)),
66 IOMUX_PADS(PAD_ENET_MDC__ENET_MDC | MUX_PAD_CTRL(ENET_PAD_CTRL)),
67 IOMUX_PADS(PAD_RGMII_TXC__RGMII_TXC | MUX_PAD_CTRL(ENET_PAD_CTRL)),
68 IOMUX_PADS(PAD_RGMII_TD0__RGMII_TD0 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
69 IOMUX_PADS(PAD_RGMII_TD1__RGMII_TD1 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
70 IOMUX_PADS(PAD_RGMII_TD2__RGMII_TD2 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
71 IOMUX_PADS(PAD_RGMII_TD3__RGMII_TD3 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
72 IOMUX_PADS(PAD_RGMII_RXC__RGMII_RXC | MUX_PAD_CTRL(ENET_PAD_CTRL)),
73 IOMUX_PADS(PAD_RGMII_RD0__RGMII_RD0 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
74 IOMUX_PADS(PAD_RGMII_RD1__RGMII_RD1 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
75 IOMUX_PADS(PAD_RGMII_RD2__RGMII_RD2 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
76 IOMUX_PADS(PAD_RGMII_RD3__RGMII_RD3 | MUX_PAD_CTRL(ENET_PAD_CTRL)),
77 IOMUX_PADS(PAD_ENET_REF_CLK__ENET_TX_CLK |
78 MUX_PAD_CTRL(ENET_PAD_CTRL)),
79 IOMUX_PADS(PAD_RGMII_TX_CTL__RGMII_TX_CTL |
80 MUX_PAD_CTRL(ENET_PAD_CTRL)),
81 IOMUX_PADS(PAD_RGMII_RX_CTL__RGMII_RX_CTL |
82 MUX_PAD_CTRL(ENET_PAD_CTRL)),
83 IOMUX_PADS(PAD_ENET_CRS_DV__GPIO1_IO25 | MUX_PAD_CTRL(NO_PAD_CTRL)),
84 };
85
86 iomux_v3_cfg_t const enet_pads1[] = {
87 /* pin 35 - 1 (PHY_AD2) on reset */
88 IOMUX_PADS(PAD_RGMII_RXC__GPIO6_IO30 | MUX_PAD_CTRL(NO_PAD_CTRL)),
89 /* pin 32 - 1 - (MODE0) all */
90 IOMUX_PADS(PAD_RGMII_RD0__GPIO6_IO25 | MUX_PAD_CTRL(NO_PAD_CTRL)),
91 /* pin 31 - 1 - (MODE1) all */
92 IOMUX_PADS(PAD_RGMII_RD1__GPIO6_IO27 | MUX_PAD_CTRL(NO_PAD_CTRL)),
93 /* pin 28 - 1 - (MODE2) all */
94 IOMUX_PADS(PAD_RGMII_RD2__GPIO6_IO28 | MUX_PAD_CTRL(NO_PAD_CTRL)),
95 /* pin 27 - 1 - (MODE3) all */
96 IOMUX_PADS(PAD_RGMII_RD3__GPIO6_IO29 | MUX_PAD_CTRL(NO_PAD_CTRL)),
97 /* pin 33 - 1 - (CLK125_EN) 125Mhz clockout enabled */
98 IOMUX_PADS(PAD_RGMII_RX_CTL__GPIO6_IO24 | MUX_PAD_CTRL(NO_PAD_CTRL)),
99 /* pin 42 PHY nRST */
100 IOMUX_PADS(PAD_ENET_CRS_DV__GPIO1_IO25 | MUX_PAD_CTRL(NO_PAD_CTRL)),
101 };
102
mx6_rgmii_rework(struct phy_device * phydev)103 static int mx6_rgmii_rework(struct phy_device *phydev)
104 {
105
106 /* min rx data delay */
107 ksz9021_phy_extended_write(phydev, MII_KSZ9021_EXT_RGMII_RX_DATA_SKEW,
108 0x0);
109 /* min tx data delay */
110 ksz9021_phy_extended_write(phydev, MII_KSZ9021_EXT_RGMII_TX_DATA_SKEW,
111 0x0);
112 /* max rx/tx clock delay, min rx/tx control */
113 ksz9021_phy_extended_write(phydev, MII_KSZ9021_EXT_RGMII_CLOCK_SKEW,
114 0xf0f0);
115
116 return 0;
117 }
118
board_phy_config(struct phy_device * phydev)119 int board_phy_config(struct phy_device *phydev)
120 {
121 mx6_rgmii_rework(phydev);
122
123 if (phydev->drv->config)
124 return phydev->drv->config(phydev);
125
126 return 0;
127 }
128
129 #define ENET_NRST IMX_GPIO_NR(1, 25)
130
setup_iomux_enet(void)131 void setup_iomux_enet(void)
132 {
133 SETUP_IOMUX_PADS(enet_pads);
134
135 }
136
board_eth_init(bd_t * bis)137 int board_eth_init(bd_t *bis)
138 {
139 uint32_t base = IMX_FEC_BASE;
140 struct mii_dev *bus = NULL;
141 struct phy_device *phydev = NULL;
142 int ret;
143
144 setup_iomux_enet();
145
146 bus = fec_get_miibus(base, -1);
147 if (!bus)
148 return -EINVAL;
149 /* scan phy */
150 phydev = phy_find_by_mask(bus, (0xf << CONFIG_FEC_MXC_PHYADDR),
151 PHY_INTERFACE_MODE_RGMII);
152
153 if (!phydev) {
154 ret = -EINVAL;
155 goto free_bus;
156 }
157 ret = fec_probe(bis, -1, base, bus, phydev);
158 if (ret)
159 goto free_phydev;
160
161 return 0;
162
163 free_phydev:
164 free(phydev);
165 free_bus:
166 free(bus);
167 return ret;
168 }
169
board_early_init_f(void)170 int board_early_init_f(void)
171 {
172 SETUP_IOMUX_PADS(uart1_pads);
173
174 return 0;
175 }
176
board_init(void)177 int board_init(void)
178 {
179 /* Address of boot parameters */
180 gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
181
182 /* Take in reset the ATMega processor */
183 SETUP_IOMUX_PADS(gpios_pads);
184 gpio_direction_output(IMX_GPIO_NR(5, 4), 0);
185
186 return 0;
187 }
188
dram_init(void)189 int dram_init(void)
190 {
191 gd->ram_size = imx_ddr_size();
192
193 return 0;
194 }
195
196 struct fsl_esdhc_cfg usdhc_cfg[1] = {
197 {USDHC2_BASE_ADDR, 0},
198 };
199
200 #define USDHC2_CD_GPIO IMX_GPIO_NR(2, 0)
board_mmc_getcd(struct mmc * mmc)201 int board_mmc_getcd(struct mmc *mmc)
202 {
203 struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
204 int ret = 0;
205
206 if (cfg->esdhc_base == USDHC2_BASE_ADDR)
207 ret = 1;
208
209 return ret;
210 }
211
board_mmc_init(bd_t * bis)212 int board_mmc_init(bd_t *bis)
213 {
214 int ret;
215
216 SETUP_IOMUX_PADS(usdhc2_pads);
217 gpio_direction_input(USDHC2_CD_GPIO);
218 usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
219 usdhc_cfg[0].max_bus_width = 4;
220
221 ret = fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
222 if (ret) {
223 printf("Warning: failed to initialize mmc dev \n");
224 return ret;
225 }
226
227 return 0;
228 }
229
230 #if defined(CONFIG_SPL_BUILD)
231 #include <asm/arch/mx6-ddr.h>
232
233 /*
234 * Driving strength:
235 * 0x30 == 40 Ohm
236 * 0x28 == 48 Ohm
237 */
238 #define IMX6SDL_DRIVE_STRENGTH 0x230
239
240
241 /* configure MX6SOLO/DUALLITE mmdc DDR io registers */
242 struct mx6sdl_iomux_ddr_regs mx6sdl_ddr_ioregs = {
243 .dram_sdclk_0 = IMX6SDL_DRIVE_STRENGTH,
244 .dram_sdclk_1 = IMX6SDL_DRIVE_STRENGTH,
245 .dram_cas = IMX6SDL_DRIVE_STRENGTH,
246 .dram_ras = IMX6SDL_DRIVE_STRENGTH,
247 .dram_reset = IMX6SDL_DRIVE_STRENGTH,
248 .dram_sdcke0 = IMX6SDL_DRIVE_STRENGTH,
249 .dram_sdcke1 = IMX6SDL_DRIVE_STRENGTH,
250 .dram_sdba2 = 0x00000000,
251 .dram_sdodt0 = IMX6SDL_DRIVE_STRENGTH,
252 .dram_sdodt1 = IMX6SDL_DRIVE_STRENGTH,
253 .dram_sdqs0 = IMX6SDL_DRIVE_STRENGTH,
254 .dram_sdqs1 = IMX6SDL_DRIVE_STRENGTH,
255 .dram_sdqs2 = IMX6SDL_DRIVE_STRENGTH,
256 .dram_sdqs3 = IMX6SDL_DRIVE_STRENGTH,
257 .dram_sdqs4 = IMX6SDL_DRIVE_STRENGTH,
258 .dram_sdqs5 = IMX6SDL_DRIVE_STRENGTH,
259 .dram_sdqs6 = IMX6SDL_DRIVE_STRENGTH,
260 .dram_sdqs7 = IMX6SDL_DRIVE_STRENGTH,
261 .dram_dqm0 = IMX6SDL_DRIVE_STRENGTH,
262 .dram_dqm1 = IMX6SDL_DRIVE_STRENGTH,
263 .dram_dqm2 = IMX6SDL_DRIVE_STRENGTH,
264 .dram_dqm3 = IMX6SDL_DRIVE_STRENGTH,
265 .dram_dqm4 = IMX6SDL_DRIVE_STRENGTH,
266 .dram_dqm5 = IMX6SDL_DRIVE_STRENGTH,
267 .dram_dqm6 = IMX6SDL_DRIVE_STRENGTH,
268 .dram_dqm7 = IMX6SDL_DRIVE_STRENGTH,
269 };
270
271 /* configure MX6SOLO/DUALLITE mmdc GRP io registers */
272 struct mx6sdl_iomux_grp_regs mx6sdl_grp_ioregs = {
273 .grp_ddr_type = 0x000c0000,
274 .grp_ddrmode_ctl = 0x00020000,
275 .grp_ddrpke = 0x00000000,
276 .grp_addds = IMX6SDL_DRIVE_STRENGTH,
277 .grp_ctlds = IMX6SDL_DRIVE_STRENGTH,
278 .grp_ddrmode = 0x00020000,
279 .grp_b0ds = IMX6SDL_DRIVE_STRENGTH,
280 .grp_b1ds = IMX6SDL_DRIVE_STRENGTH,
281 .grp_b2ds = IMX6SDL_DRIVE_STRENGTH,
282 .grp_b3ds = IMX6SDL_DRIVE_STRENGTH,
283 .grp_b4ds = IMX6SDL_DRIVE_STRENGTH,
284 .grp_b5ds = IMX6SDL_DRIVE_STRENGTH,
285 .grp_b6ds = IMX6SDL_DRIVE_STRENGTH,
286 .grp_b7ds = IMX6SDL_DRIVE_STRENGTH,
287 };
288
289 /* MT41K128M16JT-125 */
290 static struct mx6_ddr3_cfg mt41k128m16jt_125 = {
291 /* quad = 1066, duallite = 800 */
292 .mem_speed = 1066,
293 .density = 2,
294 .width = 16,
295 .banks = 8,
296 .rowaddr = 14,
297 .coladdr = 10,
298 .pagesz = 2,
299 .trcd = 1375,
300 .trcmin = 4875,
301 .trasmin = 3500,
302 .SRT = 0,
303 };
304
305 static struct mx6_mmdc_calibration mx6dl_1g_mmdc_calib = {
306 .p0_mpwldectrl0 = 0x0043004E,
307 .p0_mpwldectrl1 = 0x003D003F,
308 .p1_mpwldectrl0 = 0x00230021,
309 .p1_mpwldectrl1 = 0x0028003E,
310 .p0_mpdgctrl0 = 0x42580250,
311 .p0_mpdgctrl1 = 0x0238023C,
312 .p1_mpdgctrl0 = 0x422C0238,
313 .p1_mpdgctrl1 = 0x02180228,
314 .p0_mprddlctl = 0x44464A46,
315 .p1_mprddlctl = 0x44464A42,
316 .p0_mpwrdlctl = 0x36343236,
317 .p1_mpwrdlctl = 0x36343230,
318 };
319
320 /* DDR 64bit 1GB */
321 static struct mx6_ddr_sysinfo mem_qdl = {
322 .dsize = 2,
323 .cs1_mirror = 0,
324 /* config for full 4GB range so that get_mem_size() works */
325 .cs_density = 32,
326 .ncs = 1,
327 .bi_on = 1,
328 .rtt_nom = 1,
329 .rtt_wr = 1,
330 .ralat = 5,
331 .walat = 0,
332 .mif3_mode = 3,
333 .rst_to_cke = 0x23,
334 .sde_to_rst = 0x10,
335 .refsel = 1, /* Refresh cycles at 32KHz */
336 .refr = 7, /* 8 refresh commands per refresh cycle */
337 };
338
ccgr_init(void)339 static void ccgr_init(void)
340 {
341 struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
342
343 /* set the default clock gate to save power */
344 writel(0x00C03F3F, &ccm->CCGR0);
345 writel(0x0030FC03, &ccm->CCGR1);
346 writel(0x0FFFC000, &ccm->CCGR2);
347 writel(0x3FF00000, &ccm->CCGR3);
348 writel(0x00FFF300, &ccm->CCGR4);
349 writel(0xFFFFFFFF, &ccm->CCGR5);
350 writel(0x000003FF, &ccm->CCGR6);
351 }
352
spl_dram_init(void)353 static void spl_dram_init(void)
354 {
355 if (is_cpu_type(MXC_CPU_MX6DL)) {
356 mt41k128m16jt_125.mem_speed = 800;
357 mem_qdl.rtt_nom = 1;
358 mem_qdl.rtt_wr = 1;
359
360 mx6sdl_dram_iocfg(64, &mx6sdl_ddr_ioregs, &mx6sdl_grp_ioregs);
361 mx6_dram_cfg(&mem_qdl, &mx6dl_1g_mmdc_calib, &mt41k128m16jt_125);
362 } else {
363 printf("Wrong CPU for this board\n");
364 return;
365 }
366
367 udelay(100);
368
369 #ifdef CONFIG_MX6_DDRCAL
370
371 /* Perform DDR DRAM calibration */
372 mmdc_do_write_level_calibration(&mem_qdl);
373 mmdc_do_dqs_calibration(&mem_qdl);
374 #endif
375 }
376
check_bootcfg(void)377 static void check_bootcfg(void)
378 {
379 u32 val5, val6;
380
381 fuse_sense(0, 5, &val5);
382 fuse_sense(0, 6, &val6);
383 /* Check if boot from MMC */
384 if (val6 & 0x10) {
385 puts("BT_FUSE_SEL already fused, will do nothing\n");
386 return;
387 }
388 fuse_prog(0, 5, 0x00000840);
389 /* BT_FUSE_SEL */
390 fuse_prog(0, 6, 0x00000010);
391
392 do_reset(NULL, 0, 0, NULL);
393 }
394
board_init_f(ulong dummy)395 void board_init_f(ulong dummy)
396 {
397 ccgr_init();
398
399 /* setup AIPS and disable watchdog */
400 arch_cpu_init();
401
402 gpr_init();
403
404 /* iomux */
405 board_early_init_f();
406
407 /* setup GP timer */
408 timer_init();
409
410 /* UART clocks enabled and gd valid - init serial console */
411 preloader_console_init();
412
413 /* DDR initialization */
414 spl_dram_init();
415
416 /* Set fuses for new boards and reboot if not set */
417 check_bootcfg();
418
419 /* Clear the BSS. */
420 memset(__bss_start, 0, __bss_end - __bss_start);
421
422 /* load/boot image from boot device */
423 board_init_r(NULL, 0);
424 }
425 #endif
426